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spi: Updates for v5.4 

The big theme for this release has been performance, we've had a series
 of unrelated overhauls of a few drivers all with a big peformance
 component.  Otherwise it's been relatively quiet, highlights include:
 
  - A big overhaul of the spi-fsl-dspi driver improving the code quality,
    performance and stability from Vladimir Oltean.
  - A big performance enhancement for the bc2835 (Raspberry Pi) driver
    for unidirectional transfers from Lukas Wunner.
  - Improved performance on small transfers for the uniphier driver from
    Keiji Hayashibara.
  - Lots of coccinelle generated cleanups from Yue Haibing.
  - New device support for Freescale ls2080a and Nuvoton NPCM FIU.
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Merge tag 'spi-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "The big theme for this release has been performance, we've had a
  series of unrelated overhauls of a few drivers all with a big
  peformance component.

  Otherwise it's been relatively quiet, highlights include:

   - A big overhaul of the spi-fsl-dspi driver improving the code
     quality, performance and stability from Vladimir Oltean.

   - A big performance enhancement for the bc2835 (Raspberry Pi) driver
     for unidirectional transfers from Lukas Wunner.

   - Improved performance on small transfers for the uniphier driver
     from Keiji Hayashibara.

   - Lots of coccinelle generated cleanups from Yue Haibing.

   - New device support for Freescale ls2080a and Nuvoton NPCM FIU"

* tag 'spi-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (102 commits)
  spi: mediatek: support large PA
  spi: mediatek: add spi support for mt6765 IC
  dt-bindings: spi: update bindings for MT6765 SoC
  spi: bcm2835: Speed up RX-only DMA transfers by zero-filling TX FIFO
  spi: bcm2835: Speed up TX-only DMA transfers by clearing RX FIFO
  dmaengine: bcm2835: Avoid accessing memory when copying zeroes
  spi: bcm2835: Cache CS register value for ->prepare_message()
  dmaengine: bcm2835: Document struct bcm2835_dmadev
  spi: Guarantee cacheline alignment of driver-private data
  dmaengine: bcm2835: Allow reusable descriptors
  dmaengine: bcm2835: Allow cyclic transactions without interrupt
  spi: bcm2835: Drop dma_pending flag
  spi: bcm2835: Work around DONE bit erratum
  spi-gpio: Use PTR_ERR_OR_ZERO() in spi_gpio_request()
  spi: Use an abbreviated pointer to ctlr->cur_msg in __spi_pump_messages
  spi: npcm-fiu: remove set but not used variable 'retlen'
  spi: fsl-spi: use devm_platform_ioremap_resource() to simplify code
  spi: zynq-qspi: use devm_platform_ioremap_resource() to simplify code
  spi: zynqmp: use devm_platform_ioremap_resource() to simplify code
  spi: xlp: use devm_platform_ioremap_resource() to simplify code
  ...
This commit is contained in:
Linus Torvalds 2019-09-16 14:02:43 -07:00
parent c4d11ccb2b b769c5ba8a
commit aa62325dc3
75 changed files with 1931 additions and 884 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
Documentation/devicetree/bindings/spi/nuvoton,npcm-fiu.txt Normal file
View File

@ -0,0 +1,47 @@
* Nuvoton FLASH Interface Unit (FIU) SPI Controller
NPCM FIU supports single, dual and quad communication interface.
The NPCM7XX supports three FIU modules,
FIU0 and FIUx supports two chip selects,
FIU3 support four chip select.
Required properties:
- compatible : "nuvoton,npcm750-fiu" for the NPCM7XX BMC
- #address-cells : should be 1.
- #size-cells : should be 0.
- reg : the first contains the register location and length,
the second contains the memory mapping address and length
- reg-names: Should contain the reg names "control" and "memory"
- clocks : phandle of FIU reference clock.
Required properties in case the pins can be muxed:
- pinctrl-names : a pinctrl state named "default" must be defined.
- pinctrl-0 : phandle referencing pin configuration of the device.
Optional property:
- nuvoton,spix-mode: enable spix-mode for an expansion bus to an ASIC or CPLD.
Aliases:
- All the FIU controller nodes should be represented in the aliases node using
the following format 'fiu{n}' where n is a unique number for the alias.
In the NPCM7XX BMC:
fiu0 represent fiu 0 controller
fiu1 represent fiu 3 controller
fiu2 represent fiu x controller
Example:
fiu3: spi@c00000000 {
compatible = "nuvoton,npcm750-fiu";
#address-cells = <1>;
#size-cells = <0>;
reg = <0xfb000000 0x1000>, <0x80000000 0x10000000>;
reg-names = "control", "memory";
clocks = <&clk NPCM7XX_CLK_AHB>;
pinctrl-names = "default";
pinctrl-0 = <&spi3_pins>;
spi-nor@0 {
...
};
};

2
Documentation/devicetree/bindings/spi/spi-controller.yaml
View File

@ -31,7 +31,7 @@ properties:
If that property is used, the number of chip selects will be
increased automatically with max(cs-gpios, hardware chip selects).
So if, for example, the controller has 2 CS lines, and the
So if, for example, the controller has 4 CS lines, and the
cs-gpios looks like this
cs-gpios = <&gpio1 0 0>, <0>, <&gpio1 1 0>, <&gpio1 2 0>;

9
Documentation/devicetree/bindings/spi/spi-fsl-qspi.txt
View File

@ -3,9 +3,8 @@
Required properties:
- compatible : Should be "fsl,vf610-qspi", "fsl,imx6sx-qspi",
"fsl,imx7d-qspi", "fsl,imx6ul-qspi",
"fsl,ls1021a-qspi"
"fsl,ls1021a-qspi", "fsl,ls2080a-qspi"
or
"fsl,ls2080a-qspi" followed by "fsl,ls1021a-qspi",
"fsl,ls1043a-qspi" followed by "fsl,ls1021a-qspi"
- reg : the first contains the register location and length,
the second contains the memory mapping address and length
@ -34,7 +33,11 @@ qspi0: quadspi@40044000 {
clock-names = "qspi_en", "qspi";
flash0: s25fl128s@0 {
....
#address-cells = <1>;
#size-cells = <1>;
compatible = "spansion,s25fl128s", "jedec,spi-nor";
spi-max-frequency = <50000000>;
reg = <0>;
};
};

1
Documentation/devicetree/bindings/spi/spi-mt65xx.txt
View File

@ -5,6 +5,7 @@ Required properties:
- mediatek,mt2701-spi: for mt2701 platforms
- mediatek,mt2712-spi: for mt2712 platforms
- mediatek,mt6589-spi: for mt6589 platforms
- mediatek,mt6765-spi: for mt6765 platforms
- mediatek,mt7622-spi: for mt7622 platforms
- "mediatek,mt7629-spi", "mediatek,mt7622-spi": for mt7629 platforms
- mediatek,mt8135-spi: for mt8135 platforms

11
Documentation/devicetree/bindings/spi/spi-sprd-adi.txt
View File

@ -25,18 +25,23 @@ data by ADI software channels at the same time, or two parallel routine of setti
ADI registers will make ADI controller registers chaos to lead incorrect results.
Then we need one hardware spinlock to synchronize between the multiple subsystems.
The new version ADI controller supplies multiple master channels for different
subsystem accessing, that means no need to add hardware spinlock to synchronize,
thus change the hardware spinlock support to be optional to keep backward
compatibility.
Required properties:
- compatible: Should be "sprd,sc9860-adi".
- reg: Offset and length of ADI-SPI controller register space.
- hwlocks: Reference to a phandle of a hwlock provider node.
- hwlock-names: Reference to hwlock name strings defined in the same order
as the hwlocks, should be "adi".
- #address-cells: Number of cells required to define a chip select address
on the ADI-SPI bus. Should be set to 1.
- #size-cells: Size of cells required to define a chip select address size
on the ADI-SPI bus. Should be set to 0.
Optional properties:
- hwlocks: Reference to a phandle of a hwlock provider node.
- hwlock-names: Reference to hwlock name strings defined in the same order
as the hwlocks, should be "adi".
- sprd,hw-channels: This is an array of channel values up to 49 channels.
The first value specifies the hardware channel id which is used to
transfer data triggered by hardware automatically, and the second

2
arch/arm/mach-ep93xx/edb93xx.c
View File

@ -103,7 +103,7 @@ static struct spi_board_info edb93xx_spi_board_info[] __initdata = {
};
static struct gpiod_lookup_table edb93xx_spi_cs_gpio_table = {
.dev_id = "ep93xx-spi.0",
.dev_id = "spi0",
.table = {
GPIO_LOOKUP("A", 6, "cs", GPIO_ACTIVE_LOW),
{ },

2
arch/arm/mach-ep93xx/simone.c
View File

@ -73,7 +73,7 @@ static struct spi_board_info simone_spi_devices[] __initdata = {
* v1.3 parts will still work, since the signal on SFRMOUT is automatic.
*/
static struct gpiod_lookup_table simone_spi_cs_gpio_table = {
.dev_id = "ep93xx-spi.0",
.dev_id = "spi0",
.table = {
GPIO_LOOKUP("A", 1, "cs", GPIO_ACTIVE_LOW),
{ },

4
arch/arm/mach-ep93xx/ts72xx.c
View File

@ -267,7 +267,7 @@ static struct spi_board_info bk3_spi_board_info[] __initdata = {
* goes through CPLD
*/
static struct gpiod_lookup_table bk3_spi_cs_gpio_table = {
.dev_id = "ep93xx-spi.0",
.dev_id = "spi0",
.table = {
GPIO_LOOKUP("F", 3, "cs", GPIO_ACTIVE_LOW),
{ },
@ -316,7 +316,7 @@ static struct spi_board_info ts72xx_spi_devices[] __initdata = {
};
static struct gpiod_lookup_table ts72xx_spi_cs_gpio_table = {
.dev_id = "ep93xx-spi.0",
.dev_id = "spi0",
.table = {
/* DIO_17 */
GPIO_LOOKUP("F", 2, "cs", GPIO_ACTIVE_LOW),

2
arch/arm/mach-ep93xx/vision_ep9307.c
View File

@ -242,7 +242,7 @@ static struct spi_board_info vision_spi_board_info[] __initdata = {
};
static struct gpiod_lookup_table vision_spi_cs_gpio_table = {
.dev_id = "ep93xx-spi.0",
.dev_id = "spi0",
.table = {
GPIO_LOOKUP_IDX("A", 6, "cs", 0, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("A", 7, "cs", 1, GPIO_ACTIVE_LOW),

38
drivers/dma/bcm2835-dma.c
View File

@ -37,10 +37,19 @@
#define BCM2835_DMA_MAX_DMA_CHAN_SUPPORTED 14
#define BCM2835_DMA_CHAN_NAME_SIZE 8
/**
* struct bcm2835_dmadev - BCM2835 DMA controller
* @ddev: DMA device
* @base: base address of register map
* @dma_parms: DMA parameters (to convey 1 GByte max segment size to clients)
* @zero_page: bus address of zero page (to detect transactions copying from
* zero page and avoid accessing memory if so)
*/
struct bcm2835_dmadev {
struct dma_device ddev;
void __iomem *base;
struct device_dma_parameters dma_parms;
dma_addr_t zero_page;
};
struct bcm2835_dma_cb {
@ -687,11 +696,12 @@ static struct dma_async_tx_descriptor *bcm2835_dma_prep_dma_cyclic(
size_t period_len, enum dma_transfer_direction direction,
unsigned long flags)
{
struct bcm2835_dmadev *od = to_bcm2835_dma_dev(chan->device);
struct bcm2835_chan *c = to_bcm2835_dma_chan(chan);
struct bcm2835_desc *d;
dma_addr_t src, dst;
u32 info = BCM2835_DMA_WAIT_RESP;
u32 extra = BCM2835_DMA_INT_EN;
u32 extra = 0;
size_t max_len = bcm2835_dma_max_frame_length(c);
size_t frames;
@ -707,6 +717,11 @@ static struct dma_async_tx_descriptor *bcm2835_dma_prep_dma_cyclic(
return NULL;
}
if (flags & DMA_PREP_INTERRUPT)
extra |= BCM2835_DMA_INT_EN;
else
period_len = buf_len;
/*
* warn if buf_len is not a multiple of period_len - this may leed
* to unexpected latencies for interrupts and thus audiable clicks
@ -732,6 +747,10 @@ static struct dma_async_tx_descriptor *bcm2835_dma_prep_dma_cyclic(
dst = c->cfg.dst_addr;
src = buf_addr;
info |= BCM2835_DMA_D_DREQ | BCM2835_DMA_S_INC;
/* non-lite channels can write zeroes w/o accessing memory */
if (buf_addr == od->zero_page && !c->is_lite_channel)
info |= BCM2835_DMA_S_IGNORE;
}
/* calculate number of frames */
@ -778,7 +797,10 @@ static int bcm2835_dma_terminate_all(struct dma_chan *chan)
/* stop DMA activity */
if (c->desc) {
vchan_terminate_vdesc(&c->desc->vd);
if (c->desc->vd.tx.flags & DMA_PREP_INTERRUPT)
vchan_terminate_vdesc(&c->desc->vd);
else
vchan_vdesc_fini(&c->desc->vd);
c->desc = NULL;
bcm2835_dma_abort(c);
}
@ -831,6 +853,9 @@ static void bcm2835_dma_free(struct bcm2835_dmadev *od)
list_del(&c->vc.chan.device_node);
tasklet_kill(&c->vc.task);
}
dma_unmap_page_attrs(od->ddev.dev, od->zero_page, PAGE_SIZE,
DMA_TO_DEVICE, DMA_ATTR_SKIP_CPU_SYNC);
}
static const struct of_device_id bcm2835_dma_of_match[] = {
@ -907,11 +932,20 @@ static int bcm2835_dma_probe(struct platform_device *pdev)
od->ddev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV) |
BIT(DMA_MEM_TO_MEM);
od->ddev.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
od->ddev.descriptor_reuse = true;
od->ddev.dev = &pdev->dev;
INIT_LIST_HEAD(&od->ddev.channels);
platform_set_drvdata(pdev, od);
od->zero_page = dma_map_page_attrs(od->ddev.dev, ZERO_PAGE(0), 0,
PAGE_SIZE, DMA_TO_DEVICE,
DMA_ATTR_SKIP_CPU_SYNC);
if (dma_mapping_error(od->ddev.dev, od->zero_page)) {
dev_err(&pdev->dev, "Failed to map zero page\n");
return -ENOMEM;
}
/* Request DMA channel mask from device tree */
if (of_property_read_u32(pdev->dev.of_node,
"brcm,dma-channel-mask",

2
drivers/platform/chrome/cros_ec_spi.c
View File

@ -706,7 +706,7 @@ static int cros_ec_spi_devm_high_pri_alloc(struct device *dev,
struct cros_ec_spi *ec_spi)
{
struct sched_param sched_priority = {
.sched_priority = MAX_RT_PRIO - 1,
.sched_priority = MAX_RT_PRIO / 2,
};
int err;

10
drivers/spi/Kconfig
View File

@ -433,6 +433,16 @@ config SPI_MT7621
help
This selects a driver for the MediaTek MT7621 SPI Controller.
config SPI_NPCM_FIU
tristate "Nuvoton NPCM FLASH Interface Unit"
depends on ARCH_NPCM || COMPILE_TEST
depends on OF && HAS_IOMEM
help
This enables support for the Flash Interface Unit SPI controller
in master mode.
This driver does not support generic SPI. The implementation only
supports spi-mem interface.
config SPI_NPCM_PSPI
tristate "Nuvoton NPCM PSPI Controller"
depends on ARCH_NPCM || COMPILE_TEST

1
drivers/spi/Makefile
View File

@ -63,6 +63,7 @@ obj-$(CONFIG_SPI_MT65XX) += spi-mt65xx.o
obj-$(CONFIG_SPI_MT7621) += spi-mt7621.o
obj-$(CONFIG_SPI_MXIC) += spi-mxic.o
obj-$(CONFIG_SPI_MXS) += spi-mxs.o
obj-$(CONFIG_SPI_NPCM_FIU) += spi-npcm-fiu.o
obj-$(CONFIG_SPI_NPCM_PSPI) += spi-npcm-pspi.o
obj-$(CONFIG_SPI_NUC900) += spi-nuc900.o
obj-$(CONFIG_SPI_NXP_FLEXSPI) += spi-nxp-fspi.o

1
drivers/spi/atmel-quadspi.c
View File

@ -526,7 +526,6 @@ static int atmel_qspi_probe(struct platform_device *pdev)
/* Request the IRQ */
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "missing IRQ\n");
err = irq;
goto disable_qspick;
}

4
drivers/spi/spi-altera.c
View File

@ -170,7 +170,6 @@ static int altera_spi_probe(struct platform_device *pdev)
{
struct altera_spi *hw;
struct spi_master *master;
struct resource *res;
int err = -ENODEV;
master = spi_alloc_master(&pdev->dev, sizeof(struct altera_spi));
@ -189,8 +188,7 @@ static int altera_spi_probe(struct platform_device *pdev)
hw = spi_master_get_devdata(master);
/* find and map our resources */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hw->base = devm_ioremap_resource(&pdev->dev, res);
hw->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(hw->base)) {
err = PTR_ERR(hw->base);
goto exit;

5
drivers/spi/spi-armada-3700.c
View File

@ -817,7 +817,6 @@ static int a3700_spi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *of_node = dev->of_node;
struct resource *res;
struct spi_master *master;
struct a3700_spi *spi;
u32 num_cs = 0;
@ -855,8 +854,7 @@ static int a3700_spi_probe(struct platform_device *pdev)
spi->master = master;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
spi->base = devm_ioremap_resource(dev, res);
spi->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(spi->base)) {
ret = PTR_ERR(spi->base);
goto error;
@ -864,7 +862,6 @@ static int a3700_spi_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(dev, "could not get irq: %d\n", irq);
ret = -ENXIO;
goto error;
}

4
drivers/spi/spi-ath79.c
View File

@ -139,7 +139,6 @@ static int ath79_spi_probe(struct platform_device *pdev)
struct spi_master *master;
struct ath79_spi *sp;
struct ath79_spi_platform_data *pdata;
struct resource *r;
unsigned long rate;
int ret;
@ -169,8 +168,7 @@ static int ath79_spi_probe(struct platform_device *pdev)
sp->bitbang.txrx_word[SPI_MODE_0] = ath79_spi_txrx_mode0;
sp->bitbang.flags = SPI_CS_HIGH;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
sp->base = devm_ioremap_resource(&pdev->dev, r);
sp->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(sp->base)) {
ret = PTR_ERR(sp->base);
goto err_put_master;

5
drivers/spi/spi-atmel.c
View File

@ -23,6 +23,7 @@
#include <linux/gpio/consumer.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pm_runtime.h>
#include <trace/events/spi.h>
/* SPI register offsets */
#define SPI_CR 0x0000
@ -1409,9 +1410,13 @@ static int atmel_spi_transfer_one_message(struct spi_master *master,
msg->actual_length = 0;
list_for_each_entry(xfer, &msg->transfers, transfer_list) {
trace_spi_transfer_start(msg, xfer);
ret = atmel_spi_one_transfer(master, msg, xfer);
if (ret)
goto msg_done;
trace_spi_transfer_stop(msg, xfer);
}
if (as->use_pdc)

4
drivers/spi/spi-axi-spi-engine.c
View File

@ -460,7 +460,6 @@ static int spi_engine_probe(struct platform_device *pdev)
struct spi_engine *spi_engine;
struct spi_master *master;
unsigned int version;
struct resource *res;
int irq;
int ret;
@ -480,8 +479,7 @@ static int spi_engine_probe(struct platform_device *pdev)
spin_lock_init(&spi_engine->lock);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
spi_engine->base = devm_ioremap_resource(&pdev->dev, res);
spi_engine->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(spi_engine->base)) {
ret = PTR_ERR(spi_engine->base);
goto err_put_master;

5
drivers/spi/spi-bcm-qspi.c
View File

@ -343,7 +343,7 @@ static int bcm_qspi_bspi_set_flex_mode(struct bcm_qspi *qspi,
{
int bpc = 0, bpp = 0;
u8 command = op->cmd.opcode;
int width = op->cmd.buswidth ? op->cmd.buswidth : SPI_NBITS_SINGLE;
int width = op->data.buswidth ? op->data.buswidth : SPI_NBITS_SINGLE;
int addrlen = op->addr.nbytes;
int flex_mode = 1;
@ -897,6 +897,7 @@ static int bcm_qspi_transfer_one(struct spi_master *master,
read_from_hw(qspi, slots);
}
bcm_qspi_enable_bspi(qspi);
return 0;
}
@ -981,7 +982,7 @@ static int bcm_qspi_exec_mem_op(struct spi_mem *mem,
if (mspi_read)
return bcm_qspi_mspi_exec_mem_op(spi, op);
ret = bcm_qspi_bspi_set_mode(qspi, op, -1);
ret = bcm_qspi_bspi_set_mode(qspi, op, 0);
if (!ret)
ret = bcm_qspi_bspi_exec_mem_op(spi, op);

470
drivers/spi/spi-bcm2835.c
View File

@ -25,7 +25,9 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio/machine.h> /* FIXME: using chip internals */
#include <linux/gpio/driver.h> /* FIXME: using chip internals */
#include <linux/of_irq.h>
#include <linux/spi/spi.h>
@ -66,6 +68,7 @@
#define BCM2835_SPI_FIFO_SIZE 64
#define BCM2835_SPI_FIFO_SIZE_3_4 48
#define BCM2835_SPI_DMA_MIN_LENGTH 96
#define BCM2835_SPI_NUM_CS 3 /* raise as necessary */
#define BCM2835_SPI_MODE_BITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH \
| SPI_NO_CS | SPI_3WIRE)
@ -92,7 +95,8 @@ MODULE_PARM_DESC(polling_limit_us,
* @rx_prologue: bytes received without DMA if first RX sglist entry's
* length is not a multiple of 4 (to overcome hardware limitation)
* @tx_spillover: whether @tx_prologue spills over to second TX sglist entry
* @dma_pending: whether a DMA transfer is in progress
* @prepare_cs: precalculated CS register value for ->prepare_message()
* (uses slave-specific clock polarity and phase settings)
* @debugfs_dir: the debugfs directory - neede to remove debugfs when
* unloading the module
* @count_transfer_polling: count of how often polling mode is used
@ -102,6 +106,19 @@ MODULE_PARM_DESC(polling_limit_us,
* These are counted as well in @count_transfer_polling and
* @count_transfer_irq
* @count_transfer_dma: count how often dma mode is used
* @chip_select: SPI slave currently selected
* (used by bcm2835_spi_dma_tx_done() to write @clear_rx_cs)
* @tx_dma_active: whether a TX DMA descriptor is in progress
* @rx_dma_active: whether a RX DMA descriptor is in progress
* (used by bcm2835_spi_dma_tx_done() to handle a race)
* @fill_tx_desc: preallocated TX DMA descriptor used for RX-only transfers
* (cyclically copies from zero page to TX FIFO)
* @fill_tx_addr: bus address of zero page
* @clear_rx_desc: preallocated RX DMA descriptor used for TX-only transfers
* (cyclically clears RX FIFO by writing @clear_rx_cs to CS register)
* @clear_rx_addr: bus address of @clear_rx_cs
* @clear_rx_cs: precalculated CS register value to clear RX FIFO
* (uses slave-specific clock polarity and phase settings)
*/
struct bcm2835_spi {
void __iomem *regs;
@ -115,13 +132,22 @@ struct bcm2835_spi {
int tx_prologue;
int rx_prologue;
unsigned int tx_spillover;
unsigned int dma_pending;
u32 prepare_cs[BCM2835_SPI_NUM_CS];
struct dentry *debugfs_dir;
u64 count_transfer_polling;
u64 count_transfer_irq;
u64 count_transfer_irq_after_polling;
u64 count_transfer_dma;
u8 chip_select;
unsigned int tx_dma_active;
unsigned int rx_dma_active;
struct dma_async_tx_descriptor *fill_tx_desc;
dma_addr_t fill_tx_addr;
struct dma_async_tx_descriptor *clear_rx_desc[BCM2835_SPI_NUM_CS];
dma_addr_t clear_rx_addr;
u32 clear_rx_cs[BCM2835_SPI_NUM_CS] ____cacheline_aligned;
};
#if defined(CONFIG_DEBUG_FS)
@ -319,6 +345,13 @@ static void bcm2835_spi_reset_hw(struct spi_controller *ctlr)
BCM2835_SPI_CS_INTD |
BCM2835_SPI_CS_DMAEN |
BCM2835_SPI_CS_TA);
/*
* Transmission sometimes breaks unless the DONE bit is written at the
* end of every transfer. The spec says it's a RO bit. Either the
* spec is wrong and the bit is actually of type RW1C, or it's a
* hardware erratum.
*/
cs |= BCM2835_SPI_CS_DONE;
/* and reset RX/TX FIFOS */
cs |= BCM2835_SPI_CS_CLEAR_RX | BCM2835_SPI_CS_CLEAR_TX;
@ -448,14 +481,14 @@ static void bcm2835_spi_transfer_prologue(struct spi_controller *ctlr,
bs->rx_prologue = 0;
bs->tx_spillover = false;
if (!sg_is_last(&tfr->tx_sg.sgl[0]))
if (bs->tx_buf && !sg_is_last(&tfr->tx_sg.sgl[0]))
bs->tx_prologue = sg_dma_len(&tfr->tx_sg.sgl[0]) & 3;
if (!sg_is_last(&tfr->rx_sg.sgl[0])) {
if (bs->rx_buf && !sg_is_last(&tfr->rx_sg.sgl[0])) {
bs->rx_prologue = sg_dma_len(&tfr->rx_sg.sgl[0]) & 3;
if (bs->rx_prologue > bs->tx_prologue) {
if (sg_is_last(&tfr->tx_sg.sgl[0])) {
if (!bs->tx_buf || sg_is_last(&tfr->tx_sg.sgl[0])) {
bs->tx_prologue = bs->rx_prologue;
} else {
bs->tx_prologue += 4;
@ -477,7 +510,9 @@ static void bcm2835_spi_transfer_prologue(struct spi_controller *ctlr,
bcm2835_wr_fifo_count(bs, bs->rx_prologue);
bcm2835_wait_tx_fifo_empty(bs);
bcm2835_rd_fifo_count(bs, bs->rx_prologue);
bcm2835_spi_reset_hw(ctlr);
bcm2835_wr(bs, BCM2835_SPI_CS, cs | BCM2835_SPI_CS_CLEAR_RX
| BCM2835_SPI_CS_CLEAR_TX
| BCM2835_SPI_CS_DONE);
dma_sync_single_for_device(ctlr->dma_rx->device->dev,
sg_dma_address(&tfr->rx_sg.sgl[0]),
@ -487,6 +522,9 @@ static void bcm2835_spi_transfer_prologue(struct spi_controller *ctlr,
sg_dma_len(&tfr->rx_sg.sgl[0]) -= bs->rx_prologue;
}
if (!bs->tx_buf)
return;
/*
* Write remaining TX prologue. Adjust first entry in TX sglist.
* Also adjust second entry if prologue spills over to it.
@ -498,7 +536,8 @@ static void bcm2835_spi_transfer_prologue(struct spi_controller *ctlr,
| BCM2835_SPI_CS_DMAEN);
bcm2835_wr_fifo_count(bs, tx_remaining);
bcm2835_wait_tx_fifo_empty(bs);
bcm2835_wr(bs, BCM2835_SPI_CS, cs | BCM2835_SPI_CS_CLEAR_TX);
bcm2835_wr(bs, BCM2835_SPI_CS, cs | BCM2835_SPI_CS_CLEAR_TX
| BCM2835_SPI_CS_DONE);
}
if (likely(!bs->tx_spillover)) {
@ -531,6 +570,9 @@ static void bcm2835_spi_undo_prologue(struct bcm2835_spi *bs)
sg_dma_len(&tfr->rx_sg.sgl[0]) += bs->rx_prologue;
}
if (!bs->tx_buf)
goto out;
if (likely(!bs->tx_spillover)) {
sg_dma_address(&tfr->tx_sg.sgl[0]) -= bs->tx_prologue;
sg_dma_len(&tfr->tx_sg.sgl[0]) += bs->tx_prologue;
@ -539,32 +581,85 @@ static void bcm2835_spi_undo_prologue(struct bcm2835_spi *bs)
sg_dma_address(&tfr->tx_sg.sgl[1]) -= 4;
sg_dma_len(&tfr->tx_sg.sgl[1]) += 4;
}
out:
bs->tx_prologue = 0;
}
static void bcm2835_spi_dma_done(void *data)
/**
* bcm2835_spi_dma_rx_done() - callback for DMA RX channel
* @data: SPI master controller
*
* Used for bidirectional and RX-only transfers.
*/
static void bcm2835_spi_dma_rx_done(void *data)
{
struct spi_controller *ctlr = data;
struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr);
/* reset fifo and HW */
bcm2835_spi_reset_hw(ctlr);
/* and terminate tx-dma as we do not have an irq for it
/* terminate tx-dma as we do not have an irq for it
* because when the rx dma will terminate and this callback
* is called the tx-dma must have finished - can't get to this
* situation otherwise...
*/
if (cmpxchg(&bs->dma_pending, true, false)) {
dmaengine_terminate_async(ctlr->dma_tx);
bcm2835_spi_undo_prologue(bs);
}
dmaengine_terminate_async(ctlr->dma_tx);
bs->tx_dma_active = false;
bs->rx_dma_active = false;
bcm2835_spi_undo_prologue(bs);
/* reset fifo and HW */
bcm2835_spi_reset_hw(ctlr);
/* and mark as completed */;
complete(&ctlr->xfer_completion);
}
/**
* bcm2835_spi_dma_tx_done() - callback for DMA TX channel
* @data: SPI master controller
*
* Used for TX-only transfers.
*/
static void bcm2835_spi_dma_tx_done(void *data)
{
struct spi_controller *ctlr = data;
struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr);
/* busy-wait for TX FIFO to empty */
while (!(bcm2835_rd(bs, BCM2835_SPI_CS) & BCM2835_SPI_CS_DONE))
bcm2835_wr(bs, BCM2835_SPI_CS,
bs->clear_rx_cs[bs->chip_select]);
bs->tx_dma_active = false;
smp_wmb();
/*
* In case of a very short transfer, RX DMA may not have been
* issued yet. The onus is then on bcm2835_spi_transfer_one_dma()
* to terminate it immediately after issuing.
*/
if (cmpxchg(&bs->rx_dma_active, true, false))
dmaengine_terminate_async(ctlr->dma_rx);
bcm2835_spi_undo_prologue(bs);
bcm2835_spi_reset_hw(ctlr);
complete(&ctlr->xfer_completion);
}
/**
* bcm2835_spi_prepare_sg() - prepare and submit DMA descriptor for sglist
* @ctlr: SPI master controller
* @spi: SPI slave
* @tfr: SPI transfer
* @bs: BCM2835 SPI controller
* @is_tx: whether to submit DMA descriptor for TX or RX sglist
*
* Prepare and submit a DMA descriptor for the TX or RX sglist of @tfr.
* Return 0 on success or a negative error number.
*/
static int bcm2835_spi_prepare_sg(struct spi_controller *ctlr,
struct spi_device *spi,
struct spi_transfer *tfr,
struct bcm2835_spi *bs,
bool is_tx)
{
struct dma_chan *chan;
@ -581,8 +676,7 @@ static int bcm2835_spi_prepare_sg(struct spi_controller *ctlr,
chan = ctlr->dma_tx;
nents = tfr->tx_sg.nents;
sgl = tfr->tx_sg.sgl;
flags = 0 /* no tx interrupt */;
flags = tfr->rx_buf ? 0 : DMA_PREP_INTERRUPT;
} else {
dir = DMA_DEV_TO_MEM;
chan = ctlr->dma_rx;
@ -595,10 +689,17 @@ static int bcm2835_spi_prepare_sg(struct spi_controller *ctlr,
if (!desc)
return -EINVAL;
/* set callback for rx */
/*
* Completion is signaled by the RX channel for bidirectional and
* RX-only transfers; else by the TX channel for TX-only transfers.
*/
if (!is_tx) {
desc->callback = bcm2835_spi_dma_done;
desc->callback = bcm2835_spi_dma_rx_done;
desc->callback_param = ctlr;
} else if (!tfr->rx_buf) {
desc->callback = bcm2835_spi_dma_tx_done;
desc->callback_param = ctlr;
bs->chip_select = spi->chip_select;
}
/* submit it to DMA-engine */
@ -607,12 +708,60 @@ static int bcm2835_spi_prepare_sg(struct spi_controller *ctlr,
return dma_submit_error(cookie);
}
/**
* bcm2835_spi_transfer_one_dma() - perform SPI transfer using DMA engine
* @ctlr: SPI master controller
* @spi: SPI slave
* @tfr: SPI transfer
* @cs: CS register
*
* For *bidirectional* transfers (both tx_buf and rx_buf are non-%NULL), set up
* the TX and RX DMA channel to copy between memory and FIFO register.
*
* For *TX-only* transfers (rx_buf is %NULL), copying the RX FIFO's contents to
* memory is pointless. However not reading the RX FIFO isn't an option either
* because transmission is halted once it's full. As a workaround, cyclically
* clear the RX FIFO by setting the CLEAR_RX bit in the CS register.
*
* The CS register value is precalculated in bcm2835_spi_setup(). Normally
* this is called only once, on slave registration. A DMA descriptor to write
* this value is preallocated in bcm2835_dma_init(). All that's left to do
* when performing a TX-only transfer is to submit this descriptor to the RX
* DMA channel. Latency is thereby minimized. The descriptor does not
* generate any interrupts while running. It must be terminated once the
* TX DMA channel is done.
*
* Clearing the RX FIFO is paced by the DREQ signal. The signal is asserted
* when the RX FIFO becomes half full, i.e. 32 bytes. (Tuneable with the DC
* register.) Reading 32 bytes from the RX FIFO would normally require 8 bus
* accesses, whereas clearing it requires only 1 bus access. So an 8-fold
* reduction in bus traffic and thus energy consumption is achieved.
*
* For *RX-only* transfers (tx_buf is %NULL), fill the TX FIFO by cyclically
* copying from the zero page. The DMA descriptor to do this is preallocated
* in bcm2835_dma_init(). It must be terminated once the RX DMA channel is
* done and can then be reused.
*
* The BCM2835 DMA driver autodetects when a transaction copies from the zero
* page and utilizes the DMA controller's ability to synthesize zeroes instead
* of copying them from memory. This reduces traffic on the memory bus. The
* feature is not available on so-called "lite" channels, but normally TX DMA
* is backed by a full-featured channel.
*
* Zero-filling the TX FIFO is paced by the DREQ signal. Unfortunately the
* BCM2835 SPI controller continues to assert DREQ even after the DLEN register
* has been counted down to zero (hardware erratum). Thus, when the transfer
* has finished, the DMA engine zero-fills the TX FIFO until it is half full.
* (Tuneable with the DC register.) So up to 9 gratuitous bus accesses are
* performed at the end of an RX-only transfer.
*/
static int bcm2835_spi_transfer_one_dma(struct spi_controller *ctlr,
struct spi_device *spi,
struct spi_transfer *tfr,
u32 cs)
{
struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr);
dma_cookie_t cookie;
int ret;
/* update usage statistics */
@ -625,16 +774,15 @@ static int bcm2835_spi_transfer_one_dma(struct spi_controller *ctlr,
bcm2835_spi_transfer_prologue(ctlr, tfr, bs, cs);
/* setup tx-DMA */
ret = bcm2835_spi_prepare_sg(ctlr, tfr, true);
if (bs->tx_buf) {
ret = bcm2835_spi_prepare_sg(ctlr, spi, tfr, bs, true);
} else {
cookie = dmaengine_submit(bs->fill_tx_desc);
ret = dma_submit_error(cookie);
}
if (ret)
goto err_reset_hw;
/* start TX early */
dma_async_issue_pending(ctlr->dma_tx);
/* mark as dma pending */
bs->dma_pending = 1;
/* set the DMA length */
bcm2835_wr(bs, BCM2835_SPI_DLEN, bs->tx_len);
@ -642,20 +790,43 @@ static int bcm2835_spi_transfer_one_dma(struct spi_controller *ctlr,
bcm2835_wr(bs, BCM2835_SPI_CS,
cs | BCM2835_SPI_CS_TA | BCM2835_SPI_CS_DMAEN);
bs->tx_dma_active = true;
smp_wmb();
/* start TX early */
dma_async_issue_pending(ctlr->dma_tx);
/* setup rx-DMA late - to run transfers while
* mapping of the rx buffers still takes place
* this saves 10us or more.
*/
ret = bcm2835_spi_prepare_sg(ctlr, tfr, false);
if (bs->rx_buf) {
ret = bcm2835_spi_prepare_sg(ctlr, spi, tfr, bs, false);
} else {
cookie = dmaengine_submit(bs->clear_rx_desc[spi->chip_select]);
ret = dma_submit_error(cookie);
}
if (ret) {
/* need to reset on errors */
dmaengine_terminate_sync(ctlr->dma_tx);
bs->dma_pending = false;
bs->tx_dma_active = false;
goto err_reset_hw;
}
/* start rx dma late */
dma_async_issue_pending(ctlr->dma_rx);
bs->rx_dma_active = true;
smp_mb();
/*
* In case of a very short TX-only transfer, bcm2835_spi_dma_tx_done()
* may run before RX DMA is issued. Terminate RX DMA if so.
*/
if (!bs->rx_buf && !bs->tx_dma_active &&
cmpxchg(&bs->rx_dma_active, true, false)) {
dmaengine_terminate_async(ctlr->dma_rx);
bcm2835_spi_reset_hw(ctlr);
}
/* wait for wakeup in framework */
return 1;
@ -678,26 +849,52 @@ static bool bcm2835_spi_can_dma(struct spi_controller *ctlr,
return true;
}
static void bcm2835_dma_release(struct spi_controller *ctlr)
static void bcm2835_dma_release(struct spi_controller *ctlr,
struct bcm2835_spi *bs)
{
int i;
if (ctlr->dma_tx) {
dmaengine_terminate_sync(ctlr->dma_tx);
if (bs->fill_tx_desc)
dmaengine_desc_free(bs->fill_tx_desc);
if (bs->fill_tx_addr)
dma_unmap_page_attrs(ctlr->dma_tx->device->dev,
bs->fill_tx_addr, sizeof(u32),
DMA_TO_DEVICE,
DMA_ATTR_SKIP_CPU_SYNC);
dma_release_channel(ctlr->dma_tx);
ctlr->dma_tx = NULL;
}
if (ctlr->dma_rx) {
dmaengine_terminate_sync(ctlr->dma_rx);
for (i = 0; i < BCM2835_SPI_NUM_CS; i++)
if (bs->clear_rx_desc[i])
dmaengine_desc_free(bs->clear_rx_desc[i]);
if (bs->clear_rx_addr)
dma_unmap_single(ctlr->dma_rx->device->dev,
bs->clear_rx_addr,
sizeof(bs->clear_rx_cs),
DMA_TO_DEVICE);
dma_release_channel(ctlr->dma_rx);
ctlr->dma_rx = NULL;
}
}
static void bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev)
static void bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev,
struct bcm2835_spi *bs)
{
struct dma_slave_config slave_config;
const __be32 *addr;
dma_addr_t dma_reg_base;
int ret;
int ret, i;
/* base address in dma-space */
addr = of_get_address(ctlr->dev.of_node, 0, NULL, NULL);
@ -719,7 +916,11 @@ static void bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev)
goto err_release;
}
/* configure DMAs */
/*
* The TX DMA channel either copies a transfer's TX buffer to the FIFO
* or, in case of an RX-only transfer, cyclically copies from the zero
* page to the FIFO using a preallocated, reusable descriptor.
*/
slave_config.dst_addr = (u32)(dma_reg_base + BCM2835_SPI_FIFO);
slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
@ -727,17 +928,74 @@ static void bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev)
if (ret)
goto err_config;
bs->fill_tx_addr = dma_map_page_attrs(ctlr->dma_tx->device->dev,
ZERO_PAGE(0), 0, sizeof(u32),
DMA_TO_DEVICE,
DMA_ATTR_SKIP_CPU_SYNC);
if (dma_mapping_error(ctlr->dma_tx->device->dev, bs->fill_tx_addr)) {
dev_err(dev, "cannot map zero page - not using DMA mode\n");
bs->fill_tx_addr = 0;
goto err_release;
}
bs->fill_tx_desc = dmaengine_prep_dma_cyclic(ctlr->dma_tx,
bs->fill_tx_addr,
sizeof(u32), 0,
DMA_MEM_TO_DEV, 0);
if (!bs->fill_tx_desc) {
dev_err(dev, "cannot prepare fill_tx_desc - not using DMA mode\n");
goto err_release;
}
ret = dmaengine_desc_set_reuse(bs->fill_tx_desc);
if (ret) {
dev_err(dev, "cannot reuse fill_tx_desc - not using DMA mode\n");
goto err_release;
}
/*
* The RX DMA channel is used bidirectionally: It either reads the
* RX FIFO or, in case of a TX-only transfer, cyclically writes a
* precalculated value to the CS register to clear the RX FIFO.
*/
slave_config.src_addr = (u32)(dma_reg_base + BCM2835_SPI_FIFO);
slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
slave_config.dst_addr = (u32)(dma_reg_base + BCM2835_SPI_CS);
slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
ret = dmaengine_slave_config(ctlr->dma_rx, &slave_config);
if (ret)
goto err_config;
bs->clear_rx_addr = dma_map_single(ctlr->dma_rx->device->dev,
bs->clear_rx_cs,
sizeof(bs->clear_rx_cs),
DMA_TO_DEVICE);
if (dma_mapping_error(ctlr->dma_rx->device->dev, bs->clear_rx_addr)) {
dev_err(dev, "cannot map clear_rx_cs - not using DMA mode\n");
bs->clear_rx_addr = 0;
goto err_release;
}
for (i = 0; i < BCM2835_SPI_NUM_CS; i++) {
bs->clear_rx_desc[i] = dmaengine_prep_dma_cyclic(ctlr->dma_rx,
bs->clear_rx_addr + i * sizeof(u32),
sizeof(u32), 0,
DMA_MEM_TO_DEV, 0);
if (!bs->clear_rx_desc[i]) {
dev_err(dev, "cannot prepare clear_rx_desc - not using DMA mode\n");
goto err_release;
}
ret = dmaengine_desc_set_reuse(bs->clear_rx_desc[i]);
if (ret) {
dev_err(dev, "cannot reuse clear_rx_desc - not using DMA mode\n");
goto err_release;
}
}
/* all went well, so set can_dma */
ctlr->can_dma = bcm2835_spi_can_dma;
/* need to do TX AND RX DMA, so we need dummy buffers */
ctlr->flags = SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX;
return;
@ -745,7 +1003,7 @@ err_config:
dev_err(dev, "issue configuring dma: %d - not using DMA mode\n",
ret);
err_release:
bcm2835_dma_release(ctlr);
bcm2835_dma_release(ctlr, bs);
err:
return;
}
@ -812,7 +1070,7 @@ static int bcm2835_spi_transfer_one(struct spi_controller *ctlr,
struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr);
unsigned long spi_hz, clk_hz, cdiv, spi_used_hz;
unsigned long hz_per_byte, byte_limit;
u32 cs = bcm2835_rd(bs, BCM2835_SPI_CS);
u32 cs = bs->prepare_cs[spi->chip_select];
/* set clock */
spi_hz = tfr->speed_hz;
@ -834,18 +1092,8 @@ static int bcm2835_spi_transfer_one(struct spi_controller *ctlr,
bcm2835_wr(bs, BCM2835_SPI_CLK, cdiv);
/* handle all the 3-wire mode */
if (spi->mode & SPI_3WIRE && tfr->rx_buf &&
tfr->rx_buf != ctlr->dummy_rx)
if (spi->mode & SPI_3WIRE && tfr->rx_buf)
cs |= BCM2835_SPI_CS_REN;
else
cs &= ~BCM2835_SPI_CS_REN;
/*
* The driver always uses software-controlled GPIO Chip Select.
* Set the hardware-controlled native Chip Select to an invalid
* value to prevent it from interfering.
*/
cs |= BCM2835_SPI_CS_CS_10 | BCM2835_SPI_CS_CS_01;
/* set transmit buffers and length */
bs->tx_buf = tfr->tx_buf;
@ -882,7 +1130,6 @@ static int bcm2835_spi_prepare_message(struct spi_controller *ctlr,
{
struct spi_device *spi = msg->spi;
struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr);
u32 cs = bcm2835_rd(bs, BCM2835_SPI_CS);
int ret;
if (ctlr->can_dma) {
@ -897,14 +1144,11 @@ static int bcm2835_spi_prepare_message(struct spi_controller *ctlr,
return ret;
}
cs &= ~(BCM2835_SPI_CS_CPOL | BCM2835_SPI_CS_CPHA);
if (spi->mode & SPI_CPOL)
cs |= BCM2835_SPI_CS_CPOL;
if (spi->mode & SPI_CPHA)
cs |= BCM2835_SPI_CS_CPHA;
bcm2835_wr(bs, BCM2835_SPI_CS, cs);
/*
* Set up clock polarity before spi_transfer_one_message() asserts
* chip select to avoid a gratuitous clock signal edge.
*/
bcm2835_wr(bs, BCM2835_SPI_CS, bs->prepare_cs[spi->chip_select]);
return 0;
}
@ -915,11 +1159,12 @@ static void bcm2835_spi_handle_err(struct spi_controller *ctlr,
struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr);
/* if an error occurred and we have an active dma, then terminate */
if (cmpxchg(&bs->dma_pending, true, false)) {
dmaengine_terminate_sync(ctlr->dma_tx);
dmaengine_terminate_sync(ctlr->dma_rx);
bcm2835_spi_undo_prologue(bs);
}
dmaengine_terminate_sync(ctlr->dma_tx);
bs->tx_dma_active = false;
dmaengine_terminate_sync(ctlr->dma_rx);
bs->rx_dma_active = false;
bcm2835_spi_undo_prologue(bs);
/* and reset */
bcm2835_spi_reset_hw(ctlr);
}
@ -931,14 +1176,50 @@ static int chip_match_name(struct gpio_chip *chip, void *data)
static int bcm2835_spi_setup(struct spi_device *spi)
{
int err;
struct spi_controller *ctlr = spi->controller;
struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr);
struct gpio_chip *chip;
enum gpio_lookup_flags lflags;
u32 cs;
/*
* Precalculate SPI slave's CS register value for ->prepare_message():
* The driver always uses software-controlled GPIO chip select, hence
* set the hardware-controlled native chip select to an invalid value
* to prevent it from interfering.
*/
cs = BCM2835_SPI_CS_CS_10 | BCM2835_SPI_CS_CS_01;
if (spi->mode & SPI_CPOL)
cs |= BCM2835_SPI_CS_CPOL;
if (spi->mode & SPI_CPHA)
cs |= BCM2835_SPI_CS_CPHA;
bs->prepare_cs[spi->chip_select] = cs;
/*
* Precalculate SPI slave's CS register value to clear RX FIFO
* in case of a TX-only DMA transfer.
*/
if (ctlr->dma_rx) {
bs->clear_rx_cs[spi->chip_select] = cs |
BCM2835_SPI_CS_TA |
BCM2835_SPI_CS_DMAEN |
BCM2835_SPI_CS_CLEAR_RX;
dma_sync_single_for_device(ctlr->dma_rx->device->dev,
bs->clear_rx_addr,
sizeof(bs->clear_rx_cs),
DMA_TO_DEVICE);
}
/*
* sanity checking the native-chipselects
*/
if (spi->mode & SPI_NO_CS)
return 0;
if (gpio_is_valid(spi->cs_gpio))
/*
* The SPI core has successfully requested the CS GPIO line from the
* device tree, so we are done.
*/
if (spi->cs_gpiod)
return 0;
if (spi->chip_select > 1) {
/* error in the case of native CS requested with CS > 1
@ -949,29 +1230,43 @@ static int bcm2835_spi_setup(struct spi_device *spi)
"setup: only two native chip-selects are supported\n");
return -EINVAL;
}
/* now translate native cs to GPIO */
/*
* Translate native CS to GPIO
*
* FIXME: poking around in the gpiolib internals like this is
* not very good practice. Find a way to locate the real problem
* and fix it. Why is the GPIO descriptor in spi->cs_gpiod
* sometimes not assigned correctly? Erroneous device trees?
*/
/* get the gpio chip for the base */
chip = gpiochip_find("pinctrl-bcm2835", chip_match_name);
if (!chip)
return 0;
/* and calculate the real CS */
spi->cs_gpio = chip->base + 8 - spi->chip_select;
/*
* Retrieve the corresponding GPIO line used for CS.
* The inversion semantics will be handled by the GPIO core
* code, so we pass GPIOS_OUT_LOW for "unasserted" and
* the correct flag for inversion semantics. The SPI_CS_HIGH
* on spi->mode cannot be checked for polarity in this case
* as the flag use_gpio_descriptors enforces SPI_CS_HIGH.
*/
if (of_property_read_bool(spi->dev.of_node, "spi-cs-high"))
lflags = GPIO_ACTIVE_HIGH;
else
lflags = GPIO_ACTIVE_LOW;
spi->cs_gpiod = gpiochip_request_own_desc(chip, 8 - spi->chip_select,
DRV_NAME,
lflags,
GPIOD_OUT_LOW);
if (IS_ERR(spi->cs_gpiod))
return PTR_ERR(spi->cs_gpiod);
/* and set up the "mode" and level */
dev_info(&spi->dev, "setting up native-CS%i as GPIO %i\n",
spi->chip_select, spi->cs_gpio);
/* set up GPIO as output and pull to the correct level */
err = gpio_direction_output(spi->cs_gpio,
(spi->mode & SPI_CS_HIGH) ? 0 : 1);
if (err) {
dev_err(&spi->dev,
"could not set CS%i gpio %i as output: %i",
spi->chip_select, spi->cs_gpio, err);
return err;
}
dev_info(&spi->dev, "setting up native-CS%i to use GPIO\n",
spi->chip_select);
return 0;
}
@ -980,18 +1275,19 @@ static int bcm2835_spi_probe(struct platform_device *pdev)
{
struct spi_controller *ctlr;
struct bcm2835_spi *bs;
struct resource *res;
int err;
ctlr = spi_alloc_master(&pdev->dev, sizeof(*bs));
ctlr = spi_alloc_master(&pdev->dev, ALIGN(sizeof(*bs),
dma_get_cache_alignment()));
if (!ctlr)
return -ENOMEM;
platform_set_drvdata(pdev, ctlr);
ctlr->use_gpio_descriptors = true;
ctlr->mode_bits = BCM2835_SPI_MODE_BITS;
ctlr->bits_per_word_mask = SPI_BPW_MASK(8);
ctlr->num_chipselect = 3;
ctlr->num_chipselect = BCM2835_SPI_NUM_CS;
ctlr->setup = bcm2835_spi_setup;
ctlr->transfer_one = bcm2835_spi_transfer_one;
ctlr->handle_err = bcm2835_spi_handle_err;
@ -1000,8 +1296,7 @@ static int bcm2835_spi_probe(struct platform_device *pdev)
bs = spi_controller_get_devdata(ctlr);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
bs->regs = devm_ioremap_resource(&pdev->dev, res);
bs->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(bs->regs)) {
err = PTR_ERR(bs->regs);
goto out_controller_put;
@ -1016,14 +1311,13 @@ static int bcm2835_spi_probe(struct platform_device *pdev)
bs->irq = platform_get_irq(pdev, 0);
if (bs->irq <= 0) {
dev_err(&pdev->dev, "could not get IRQ: %d\n", bs->irq);
err = bs->irq ? bs->irq : -ENODEV;
goto out_controller_put;
}
clk_prepare_enable(bs->clk);
bcm2835_dma_init(ctlr, &pdev->dev);
bcm2835_dma_init(ctlr, &pdev->dev, bs);
/* initialise the hardware with the default polarities */
bcm2835_wr(bs, BCM2835_SPI_CS,
@ -1067,7 +1361,7 @@ static int bcm2835_spi_remove(struct platform_device *pdev)
clk_disable_unprepare(bs->clk);
bcm2835_dma_release(ctlr);
bcm2835_dma_release(ctlr, bs);
return 0;
}

5
drivers/spi/spi-bcm2835aux.c
View File

@ -491,7 +491,6 @@ static int bcm2835aux_spi_probe(struct platform_device *pdev)
{
struct spi_master *master;
struct bcm2835aux_spi *bs;
struct resource *res;
unsigned long clk_hz;
int err;
@ -524,8 +523,7 @@ static int bcm2835aux_spi_probe(struct platform_device *pdev)
bs = spi_master_get_devdata(master);
/* the main area */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
bs->regs = devm_ioremap_resource(&pdev->dev, res);
bs->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(bs->regs)) {
err = PTR_ERR(bs->regs);
goto out_master_put;
@ -540,7 +538,6 @@ static int bcm2835aux_spi_probe(struct platform_device *pdev)
bs->irq = platform_get_irq(pdev, 0);
if (bs->irq <= 0) {
dev_err(&pdev->dev, "could not get IRQ: %d\n", bs->irq);
err = bs->irq ? bs->irq : -ENODEV;
goto out_master_put;
}

8
drivers/spi/spi-bcm63xx-hsspi.c
View File

@ -330,7 +330,6 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev)
{
struct spi_master *master;
struct bcm63xx_hsspi *bs;
struct resource *res_mem;
void __iomem *regs;
struct device *dev = &pdev->dev;
struct clk *clk, *pll_clk = NULL;
@ -338,13 +337,10 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev)
u32 reg, rate, num_cs = HSSPI_SPI_MAX_CS;
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(dev, "no irq: %d\n", irq);
if (irq < 0)
return irq;
}
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
regs = devm_ioremap_resource(dev, res_mem);
regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(regs))
return PTR_ERR(regs);

4
drivers/spi/spi-bcm63xx.c
View File

@ -520,10 +520,8 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
}
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(dev, "no irq: %d\n", irq);
if (irq < 0)
return irq;
}
clk = devm_clk_get(dev, "spi");
if (IS_ERR(clk)) {

5
drivers/spi/spi-cadence.c
View File

@ -474,7 +474,6 @@ static int cdns_spi_probe(struct platform_device *pdev)
int ret = 0, irq;
struct spi_master *master;
struct cdns_spi *xspi;
struct resource *res;
u32 num_cs;
master = spi_alloc_master(&pdev->dev, sizeof(*xspi));
@ -485,8 +484,7 @@ static int cdns_spi_probe(struct platform_device *pdev)
master->dev.of_node = pdev->dev.of_node;
platform_set_drvdata(pdev, master);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
xspi->regs = devm_ioremap_resource(&pdev->dev, res);
xspi->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(xspi->regs)) {
ret = PTR_ERR(xspi->regs);
goto remove_master;
@ -540,7 +538,6 @@ static int cdns_spi_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq <= 0) {
ret = -ENXIO;
dev_err(&pdev->dev, "irq number is invalid\n");
goto clk_dis_all;
}

4
drivers/spi/spi-cavium-octeon.c
View File

@ -18,7 +18,6 @@
static int octeon_spi_probe(struct platform_device *pdev)
{
struct resource *res_mem;
void __iomem *reg_base;
struct spi_master *master;
struct octeon_spi *p;
@ -30,8 +29,7 @@ static int octeon_spi_probe(struct platform_device *pdev)
p = spi_master_get_devdata(master);
platform_set_drvdata(pdev, master);
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
reg_base = devm_ioremap_resource(&pdev->dev, res_mem);
reg_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(reg_base)) {
err = PTR_ERR(reg_base);
goto fail;

4
drivers/spi/spi-clps711x.c
View File

@ -91,7 +91,6 @@ static int spi_clps711x_probe(struct platform_device *pdev)
{
struct spi_clps711x_data *hw;
struct spi_master *master;
struct resource *res;
int irq, ret;
irq = platform_get_irq(pdev, 0);
@ -125,8 +124,7 @@ static int spi_clps711x_probe(struct platform_device *pdev)
goto err_out;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hw->syncio = devm_ioremap_resource(&pdev->dev, res);
hw->syncio = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(hw->syncio)) {
ret = PTR_ERR(hw->syncio);
goto err_out;

4
drivers/spi/spi-coldfire-qspi.c
View File

@ -339,7 +339,6 @@ static int mcfqspi_probe(struct platform_device *pdev)
{
struct spi_master *master;
struct mcfqspi *mcfqspi;
struct resource *res;
struct mcfqspi_platform_data *pdata;
int status;
@ -362,8 +361,7 @@ static int mcfqspi_probe(struct platform_device *pdev)
mcfqspi = spi_master_get_devdata(master);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mcfqspi->iobase = devm_ioremap_resource(&pdev->dev, res);
mcfqspi->iobase = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(mcfqspi->iobase)) {
status = PTR_ERR(mcfqspi->iobase);
goto fail0;

18
drivers/spi/spi-dw-mmio.c
View File

@ -79,14 +79,12 @@ static int dw_spi_mscc_init(struct platform_device *pdev,
const char *cpu_syscon, u32 if_si_owner_offset)
{
struct dw_spi_mscc *dwsmscc;
struct resource *res;
dwsmscc = devm_kzalloc(&pdev->dev, sizeof(*dwsmscc), GFP_KERNEL);
if (!dwsmscc)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
dwsmscc->spi_mst = devm_ioremap_resource(&pdev->dev, res);
dwsmscc->spi_mst = devm_platform_ioremap_resource(pdev, 1);
if (IS_ERR(dwsmscc->spi_mst)) {
dev_err(&pdev->dev, "SPI_MST region map failed\n");
return PTR_ERR(dwsmscc->spi_mst);
@ -138,7 +136,6 @@ static int dw_spi_mmio_probe(struct platform_device *pdev)
struct dw_spi_mmio *dwsmmio);
struct dw_spi_mmio *dwsmmio;
struct dw_spi *dws;
struct resource *mem;
int ret;
int num_cs;
@ -150,18 +147,15 @@ static int dw_spi_mmio_probe(struct platform_device *pdev)
dws = &dwsmmio->dws;
/* Get basic io resource and map it */
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
dws->regs = devm_ioremap_resource(&pdev->dev, mem);
dws->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(dws->regs)) {
dev_err(&pdev->dev, "SPI region map failed\n");
return PTR_ERR(dws->regs);
}
dws->irq = platform_get_irq(pdev, 0);
if (dws->irq < 0) {
dev_err(&pdev->dev, "no irq resource?\n");
if (dws->irq < 0)
return dws->irq; /* -ENXIO */
}
dwsmmio->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(dwsmmio->clk))
@ -172,8 +166,10 @@ static int dw_spi_mmio_probe(struct platform_device *pdev)
/* Optional clock needed to access the registers */
dwsmmio->pclk = devm_clk_get_optional(&pdev->dev, "pclk");
if (IS_ERR(dwsmmio->pclk))
return PTR_ERR(dwsmmio->pclk);
if (IS_ERR(dwsmmio->pclk)) {
ret = PTR_ERR(dwsmmio->pclk);
goto out_clk;
}
ret = clk_prepare_enable(dwsmmio->pclk);
if (ret)
goto out_clk;

20
drivers/spi/spi-dw-pci.c
View File

@ -19,6 +19,7 @@ struct spi_pci_desc {
int (*setup)(struct dw_spi *);
u16 num_cs;
u16 bus_num;
u32 max_freq;
};
static struct spi_pci_desc spi_pci_mid_desc_1 = {
@ -33,6 +34,12 @@ static struct spi_pci_desc spi_pci_mid_desc_2 = {
.bus_num = 1,
};
static struct spi_pci_desc spi_pci_ehl_desc = {
.num_cs = 1,
.bus_num = -1,
.max_freq = 100000000,
};
static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct dw_spi *dws;
@ -65,6 +72,7 @@ static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
if (desc) {
dws->num_cs = desc->num_cs;
dws->bus_num = desc->bus_num;
dws->max_freq = desc->max_freq;
if (desc->setup) {
ret = desc->setup(dws);
@ -98,16 +106,14 @@ static void spi_pci_remove(struct pci_dev *pdev)
#ifdef CONFIG_PM_SLEEP
static int spi_suspend(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct dw_spi *dws = pci_get_drvdata(pdev);
struct dw_spi *dws = dev_get_drvdata(dev);
return dw_spi_suspend_host(dws);
}
static int spi_resume(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct dw_spi *dws = pci_get_drvdata(pdev);
struct dw_spi *dws = dev_get_drvdata(dev);
return dw_spi_resume_host(dws);
}
@ -125,8 +131,14 @@ static const struct pci_device_id pci_ids[] = {
{ PCI_VDEVICE(INTEL, 0x0800), (kernel_ulong_t)&spi_pci_mid_desc_1},
/* Intel MID platform SPI controller 2 */
{ PCI_VDEVICE(INTEL, 0x0812), (kernel_ulong_t)&spi_pci_mid_desc_2},
/* Intel Elkhart Lake PSE SPI controllers */
{ PCI_VDEVICE(INTEL, 0x4b84), (kernel_ulong_t)&spi_pci_ehl_desc},
{ PCI_VDEVICE(INTEL, 0x4b85), (kernel_ulong_t)&spi_pci_ehl_desc},
{ PCI_VDEVICE(INTEL, 0x4b86), (kernel_ulong_t)&spi_pci_ehl_desc},
{ PCI_VDEVICE(INTEL, 0x4b87), (kernel_ulong_t)&spi_pci_ehl_desc},
{},
};
MODULE_DEVICE_TABLE(pci, pci_ids);
static struct pci_driver dw_spi_driver = {
.name = DRIVER_NAME,

4
drivers/spi/spi-efm32.c
View File

@ -400,10 +400,8 @@ static int efm32_spi_probe(struct platform_device *pdev)
}
ret = platform_get_irq(pdev, 0);
if (ret <= 0) {
dev_err(&pdev->dev, "failed to get rx irq (%d)\n", ret);
if (ret <= 0)
goto err;
}
ddata->rxirq = ret;

4
drivers/spi/spi-ep93xx.c
View File

@ -656,10 +656,8 @@ static int ep93xx_spi_probe(struct platform_device *pdev)
}
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "failed to get irq resources\n");
if (irq < 0)
return -EBUSY;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {

6
drivers/spi/spi-fsl-cpm.c
View File

@ -305,12 +305,10 @@ int fsl_spi_cpm_init(struct mpc8xxx_spi *mspi)
}
if (mspi->flags & SPI_CPM1) {
struct resource *res;
void *pram;
res = platform_get_resource(to_platform_device(dev),
IORESOURCE_MEM, 1);
pram = devm_ioremap_resource(dev, res);
pram = devm_platform_ioremap_resource(to_platform_device(dev),
1);
if (IS_ERR(pram))
mspi->pram = NULL;
else

678
drivers/spi/spi-fsl-dspi.c
View File

File diff suppressed because it is too large Load Diff

3
drivers/spi/spi-fsl-lib.h
View File

@ -91,9 +91,6 @@ static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg)
struct mpc8xxx_spi_probe_info {
struct fsl_spi_platform_data pdata;
int ngpios;
int *gpios;
bool *alow_flags;
__be32 __iomem *immr_spi_cs;
};

4
drivers/spi/spi-fsl-qspi.c
View File

@ -860,10 +860,8 @@ static int fsl_qspi_probe(struct platform_device *pdev)
/* find the irq */
ret = platform_get_irq(pdev, 0);
if (ret < 0) {
dev_err(dev, "failed to get the irq: %d\n", ret);
if (ret < 0)
goto err_disable_clk;
}
ret = devm_request_irq(dev, ret,
fsl_qspi_irq_handler, 0, pdev->name, q);

193
drivers/spi/spi-fsl-spi.c
View File

@ -18,7 +18,7 @@
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/fsl_devices.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kernel.h>
@ -28,7 +28,6 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_gpio.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
@ -481,32 +480,6 @@ static int fsl_spi_setup(struct spi_device *spi)
return retval;
}
if (mpc8xxx_spi->type == TYPE_GRLIB) {
if (gpio_is_valid(spi->cs_gpio)) {
int desel;
retval = gpio_request(spi->cs_gpio,
dev_name(&spi->dev));
if (retval)
return retval;
desel = !(spi->mode & SPI_CS_HIGH);
retval = gpio_direction_output(spi->cs_gpio, desel);
if (retval) {
gpio_free(spi->cs_gpio);
return retval;
}
} else if (spi->cs_gpio != -ENOENT) {
if (spi->cs_gpio < 0)
return spi->cs_gpio;
return -EINVAL;
}
/* When spi->cs_gpio == -ENOENT, a hole in the phandle list
* indicates to use native chipselect if present, or allow for
* an always selected chip
*/
}
/* Initialize chipselect - might be active for SPI_CS_HIGH mode */
fsl_spi_chipselect(spi, BITBANG_CS_INACTIVE);
@ -515,12 +488,8 @@ static int fsl_spi_setup(struct spi_device *spi)
static void fsl_spi_cleanup(struct spi_device *spi)
{
struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(spi->master);
struct spi_mpc8xxx_cs *cs = spi_get_ctldata(spi);
if (mpc8xxx_spi->type == TYPE_GRLIB && gpio_is_valid(spi->cs_gpio))
gpio_free(spi->cs_gpio);
kfree(cs);
spi_set_ctldata(spi, NULL);
}
@ -586,8 +555,8 @@ static void fsl_spi_grlib_cs_control(struct spi_device *spi, bool on)
u32 slvsel;
u16 cs = spi->chip_select;
if (gpio_is_valid(spi->cs_gpio)) {
gpio_set_value(spi->cs_gpio, on);
if (spi->cs_gpiod) {
gpiod_set_value(spi->cs_gpiod, on);
} else if (cs < mpc8xxx_spi->native_chipselects) {
slvsel = mpc8xxx_spi_read_reg(&reg_base->slvsel);
slvsel = on ? (slvsel | (1 << cs)) : (slvsel & ~(1 << cs));
@ -718,139 +687,19 @@ err:
static void fsl_spi_cs_control(struct spi_device *spi, bool on)
{
struct device *dev = spi->dev.parent->parent;
struct fsl_spi_platform_data *pdata = dev_get_platdata(dev);
struct mpc8xxx_spi_probe_info *pinfo = to_of_pinfo(pdata);
u16 cs = spi->chip_select;
if (cs < pinfo->ngpios) {
int gpio = pinfo->gpios[cs];
bool alow = pinfo->alow_flags[cs];
gpio_set_value(gpio, on ^ alow);
if (spi->cs_gpiod) {
gpiod_set_value(spi->cs_gpiod, on);
} else {
if (WARN_ON_ONCE(cs > pinfo->ngpios || !pinfo->immr_spi_cs))
struct device *dev = spi->dev.parent->parent;
struct fsl_spi_platform_data *pdata = dev_get_platdata(dev);
struct mpc8xxx_spi_probe_info *pinfo = to_of_pinfo(pdata);
if (WARN_ON_ONCE(!pinfo->immr_spi_cs))
return;
iowrite32be(on ? SPI_BOOT_SEL_BIT : 0, pinfo->immr_spi_cs);
}
}
static int of_fsl_spi_get_chipselects(struct device *dev)
{
struct device_node *np = dev->of_node;
struct fsl_spi_platform_data *pdata = dev_get_platdata(dev);
struct mpc8xxx_spi_probe_info *pinfo = to_of_pinfo(pdata);
bool spisel_boot = IS_ENABLED(CONFIG_FSL_SOC) &&
of_property_read_bool(np, "fsl,spisel_boot");
int ngpios;
int i = 0;
int ret;
ngpios = of_gpio_count(np);
ngpios = max(ngpios, 0);
if (ngpios == 0 && !spisel_boot) {
/*
* SPI w/o chip-select line. One SPI device is still permitted
* though.
*/
pdata->max_chipselect = 1;
return 0;
}
pinfo->ngpios = ngpios;
pinfo->gpios = kmalloc_array(ngpios, sizeof(*pinfo->gpios),
GFP_KERNEL);
if (!pinfo->gpios)
return -ENOMEM;
memset(pinfo->gpios, -1, ngpios * sizeof(*pinfo->gpios));
pinfo->alow_flags = kcalloc(ngpios, sizeof(*pinfo->alow_flags),
GFP_KERNEL);
if (!pinfo->alow_flags) {
ret = -ENOMEM;
goto err_alloc_flags;
}
for (; i < ngpios; i++) {
int gpio;
enum of_gpio_flags flags;
gpio = of_get_gpio_flags(np, i, &flags);
if (!gpio_is_valid(gpio)) {
dev_err(dev, "invalid gpio #%d: %d\n", i, gpio);
ret = gpio;
goto err_loop;
}
ret = gpio_request(gpio, dev_name(dev));
if (ret) {
dev_err(dev, "can't request gpio #%d: %d\n", i, ret);
goto err_loop;
}
pinfo->gpios[i] = gpio;
pinfo->alow_flags[i] = flags & OF_GPIO_ACTIVE_LOW;
ret = gpio_direction_output(pinfo->gpios[i],
pinfo->alow_flags[i]);
if (ret) {
dev_err(dev,
"can't set output direction for gpio #%d: %d\n",
i, ret);
goto err_loop;
}
}
#if IS_ENABLED(CONFIG_FSL_SOC)
if (spisel_boot) {
pinfo->immr_spi_cs = ioremap(get_immrbase() + IMMR_SPI_CS_OFFSET, 4);
if (!pinfo->immr_spi_cs) {
ret = -ENOMEM;
i = ngpios - 1;
goto err_loop;
}
}
#endif
pdata->max_chipselect = ngpios + spisel_boot;
pdata->cs_control = fsl_spi_cs_control;
return 0;
err_loop:
while (i >= 0) {
if (gpio_is_valid(pinfo->gpios[i]))
gpio_free(pinfo->gpios[i]);
i--;
}
kfree(pinfo->alow_flags);
pinfo->alow_flags = NULL;
err_alloc_flags:
kfree(pinfo->gpios);
pinfo->gpios = NULL;
return ret;
}
static int of_fsl_spi_free_chipselects(struct device *dev)
{
struct fsl_spi_platform_data *pdata = dev_get_platdata(dev);
struct mpc8xxx_spi_probe_info *pinfo = to_of_pinfo(pdata);
int i;
if (!pinfo->gpios)
return 0;
for (i = 0; i < pdata->max_chipselect; i++) {
if (gpio_is_valid(pinfo->gpios[i]))
gpio_free(pinfo->gpios[i]);
}
kfree(pinfo->gpios);
kfree(pinfo->alow_flags);
return 0;
}
static int of_fsl_spi_probe(struct platform_device *ofdev)
{
struct device *dev = &ofdev->dev;
@ -866,9 +715,21 @@ static int of_fsl_spi_probe(struct platform_device *ofdev)
type = fsl_spi_get_type(&ofdev->dev);
if (type == TYPE_FSL) {
ret = of_fsl_spi_get_chipselects(dev);
if (ret)
goto err;
struct fsl_spi_platform_data *pdata = dev_get_platdata(dev);
#if IS_ENABLED(CONFIG_FSL_SOC)
struct mpc8xxx_spi_probe_info *pinfo = to_of_pinfo(pdata);
bool spisel_boot = of_property_read_bool(np, "fsl,spisel_boot");
if (spisel_boot) {
pinfo->immr_spi_cs = ioremap(get_immrbase() + IMMR_SPI_CS_OFFSET, 4);
if (!pinfo->immr_spi_cs) {
ret = -ENOMEM;
goto err;
}
}
#endif
pdata->cs_control = fsl_spi_cs_control;
}
ret = of_address_to_resource(np, 0, &mem);
@ -891,8 +752,6 @@ static int of_fsl_spi_probe(struct platform_device *ofdev)
err:
irq_dispose_mapping(irq);
if (type == TYPE_FSL)
of_fsl_spi_free_chipselects(dev);
return ret;
}
@ -902,8 +761,6 @@ static int of_fsl_spi_remove(struct platform_device *ofdev)
struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(master);
fsl_spi_cpm_free(mpc8xxx_spi);
if (mpc8xxx_spi->type == TYPE_FSL)
of_fsl_spi_free_chipselects(&ofdev->dev);
return 0;
}

8
drivers/spi/spi-geni-qcom.c
View File

@ -534,18 +534,14 @@ static int spi_geni_probe(struct platform_device *pdev)
int ret, irq;
struct spi_master *spi;
struct spi_geni_master *mas;
struct resource *res;
void __iomem *base;
struct clk *clk;
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "Err getting IRQ %d\n", irq);
if (irq < 0)
return irq;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, res);
base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(base))
return PTR_ERR(base);

5
drivers/spi/spi-gpio.c
View File

@ -290,10 +290,7 @@ static int spi_gpio_request(struct device *dev, struct spi_gpio *spi_gpio)
return PTR_ERR(spi_gpio->miso);
spi_gpio->sck = devm_gpiod_get(dev, "sck", GPIOD_OUT_LOW);
if (IS_ERR(spi_gpio->sck))
return PTR_ERR(spi_gpio->sck);
return 0;
return PTR_ERR_OR_ZERO(spi_gpio->sck);
}
#ifdef CONFIG_OF

12
drivers/spi/spi-lantiq-ssc.c
View File

@ -819,22 +819,16 @@ static int lantiq_ssc_probe(struct platform_device *pdev)
}
rx_irq = platform_get_irq_byname(pdev, LTQ_SPI_RX_IRQ_NAME);
if (rx_irq < 0) {
dev_err(dev, "failed to get %s\n", LTQ_SPI_RX_IRQ_NAME);
if (rx_irq < 0)
return -ENXIO;
}
tx_irq = platform_get_irq_byname(pdev, LTQ_SPI_TX_IRQ_NAME);
if (tx_irq < 0) {
dev_err(dev, "failed to get %s\n", LTQ_SPI_TX_IRQ_NAME);
if (tx_irq < 0)
return -ENXIO;
}
err_irq = platform_get_irq_byname(pdev, LTQ_SPI_ERR_IRQ_NAME);
if (err_irq < 0) {
dev_err(dev, "failed to get %s\n", LTQ_SPI_ERR_IRQ_NAME);
if (err_irq < 0)
return -ENXIO;
}
master = spi_alloc_master(dev, sizeof(struct lantiq_ssc_spi));
if (!master)

4
drivers/spi/spi-lp8841-rtc.c
View File

@ -185,7 +185,6 @@ spi_lp8841_rtc_probe(struct platform_device *pdev)
int ret;
struct spi_master *master;
struct spi_lp8841_rtc *data;
void *iomem;
master = spi_alloc_master(&pdev->dev, sizeof(*data));
if (!master)
@ -207,8 +206,7 @@ spi_lp8841_rtc_probe(struct platform_device *pdev)
data = spi_master_get_devdata(master);
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
data->iomem = devm_ioremap_resource(&pdev->dev, iomem);
data->iomem = devm_platform_ioremap_resource(pdev, 0);
ret = PTR_ERR_OR_ZERO(data->iomem);
if (ret) {
dev_err(&pdev->dev, "failed to get IO address\n");

4
drivers/spi/spi-meson-spicc.c
View File

@ -503,7 +503,6 @@ static int meson_spicc_probe(struct platform_device *pdev)
{
struct spi_master *master;
struct meson_spicc_device *spicc;
struct resource *res;
int ret, irq, rate;
master = spi_alloc_master(&pdev->dev, sizeof(*spicc));
@ -517,8 +516,7 @@ static int meson_spicc_probe(struct platform_device *pdev)
spicc->pdev = pdev;
platform_set_drvdata(pdev, spicc);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
spicc->base = devm_ioremap_resource(&pdev->dev, res);
spicc->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(spicc->base)) {
dev_err(&pdev->dev, "io resource mapping failed\n");
ret = PTR_ERR(spicc->base);

4
drivers/spi/spi-meson-spifc.c
View File

@ -286,7 +286,6 @@ static int meson_spifc_probe(struct platform_device *pdev)
{
struct spi_master *master;
struct meson_spifc *spifc;
struct resource *res;
void __iomem *base;
unsigned int rate;
int ret = 0;
@ -300,8 +299,7 @@ static int meson_spifc_probe(struct platform_device *pdev)
spifc = spi_master_get_devdata(master);
spifc->dev = &pdev->dev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(spifc->dev, res);
base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(base)) {
ret = PTR_ERR(base);
goto out_err;

54
drivers/spi/spi-mt65xx.c
View File

@ -17,6 +17,7 @@
#include <linux/platform_data/spi-mt65xx.h>
#include <linux/pm_runtime.h>
#include <linux/spi/spi.h>
#include <linux/dma-mapping.h>
#define SPI_CFG0_REG 0x0000
#define SPI_CFG1_REG 0x0004
@ -28,6 +29,8 @@
#define SPI_STATUS0_REG 0x001c
#define SPI_PAD_SEL_REG 0x0024
#define SPI_CFG2_REG 0x0028
#define SPI_TX_SRC_REG_64 0x002c
#define SPI_RX_DST_REG_64 0x0030
#define SPI_CFG0_SCK_HIGH_OFFSET 0
#define SPI_CFG0_SCK_LOW_OFFSET 8
@ -73,6 +76,10 @@
#define MTK_SPI_MAX_FIFO_SIZE 32U
#define MTK_SPI_PACKET_SIZE 1024
#define MTK_SPI_32BITS_MASK (0xffffffff)
#define DMA_ADDR_EXT_BITS (36)
#define DMA_ADDR_DEF_BITS (32)
struct mtk_spi_compatible {
bool need_pad_sel;
@ -80,6 +87,8 @@ struct mtk_spi_compatible {
bool must_tx;
/* some IC design adjust cfg register to enhance time accuracy */
bool enhance_timing;
/* some IC support DMA addr extension */
bool dma_ext;
};
struct mtk_spi {
@ -102,6 +111,13 @@ static const struct mtk_spi_compatible mt2712_compat = {
.must_tx = true,
};
static const struct mtk_spi_compatible mt6765_compat = {
.need_pad_sel = true,
.must_tx = true,
.enhance_timing = true,
.dma_ext = true,
};
static const struct mtk_spi_compatible mt7622_compat = {
.must_tx = true,
.enhance_timing = true,
@ -137,6 +153,9 @@ static const struct of_device_id mtk_spi_of_match[] = {
{ .compatible = "mediatek,mt6589-spi",
.data = (void *)&mtk_common_compat,
},
{ .compatible = "mediatek,mt6765-spi",
.data = (void *)&mt6765_compat,
},
{ .compatible = "mediatek,mt7622-spi",
.data = (void *)&mt7622_compat,
},
@ -371,10 +390,25 @@ static void mtk_spi_setup_dma_addr(struct spi_master *master,
{
struct mtk_spi *mdata = spi_master_get_devdata(master);
if (mdata->tx_sgl)
writel(xfer->tx_dma, mdata->base + SPI_TX_SRC_REG);
if (mdata->rx_sgl)
writel(xfer->rx_dma, mdata->base + SPI_RX_DST_REG);
if (mdata->tx_sgl) {
writel((u32)(xfer->tx_dma & MTK_SPI_32BITS_MASK),
mdata->base + SPI_TX_SRC_REG);
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
if (mdata->dev_comp->dma_ext)
writel((u32)(xfer->tx_dma >> 32),
mdata->base + SPI_TX_SRC_REG_64);
#endif
}
if (mdata->rx_sgl) {
writel((u32)(xfer->rx_dma & MTK_SPI_32BITS_MASK),
mdata->base + SPI_RX_DST_REG);
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
if (mdata->dev_comp->dma_ext)
writel((u32)(xfer->rx_dma >> 32),
mdata->base + SPI_RX_DST_REG_64);
#endif
}
}
static int mtk_spi_fifo_transfer(struct spi_master *master,
@ -586,7 +620,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
struct mtk_spi *mdata;
const struct of_device_id *of_id;
struct resource *res;
int i, irq, ret;
int i, irq, ret, addr_bits;
master = spi_alloc_master(&pdev->dev, sizeof(*mdata));
if (!master) {
@ -664,7 +698,6 @@ static int mtk_spi_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "failed to get irq (%d)\n", irq);
ret = irq;
goto err_put_master;
}
@ -753,6 +786,15 @@ static int mtk_spi_probe(struct platform_device *pdev)
}
}
if (mdata->dev_comp->dma_ext)
addr_bits = DMA_ADDR_EXT_BITS;
else
addr_bits = DMA_ADDR_DEF_BITS;
ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(addr_bits));
if (ret)
dev_notice(&pdev->dev, "SPI dma_set_mask(%d) failed, ret:%d\n",
addr_bits, ret);
return 0;
err_disable_runtime_pm:

4
drivers/spi/spi-mt7621.c
View File

@ -327,7 +327,6 @@ static int mt7621_spi_probe(struct platform_device *pdev)
struct spi_controller *master;
struct mt7621_spi *rs;
void __iomem *base;
struct resource *r;
int status = 0;
struct clk *clk;
int ret;
@ -336,8 +335,7 @@ static int mt7621_spi_probe(struct platform_device *pdev)
if (!match)
return -EINVAL;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, r);
base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(base))
return PTR_ERR(base);

4
drivers/spi/spi-mxs.c
View File

@ -532,7 +532,6 @@ static int mxs_spi_probe(struct platform_device *pdev)
struct spi_master *master;
struct mxs_spi *spi;
struct mxs_ssp *ssp;
struct resource *iores;
struct clk *clk;
void __iomem *base;
int devid, clk_freq;
@ -545,12 +544,11 @@ static int mxs_spi_probe(struct platform_device *pdev)
*/
const int clk_freq_default = 160000000;
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq_err = platform_get_irq(pdev, 0);
if (irq_err < 0)
return irq_err;
base = devm_ioremap_resource(&pdev->dev, iores);
base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(base))
return PTR_ERR(base);

769
drivers/spi/spi-npcm-fiu.c Normal file
View File

@ -0,0 +1,769 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2019 Nuvoton Technology corporation.
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/vmalloc.h>
#include <linux/regmap.h>
#include <linux/of_device.h>
#include <linux/spi/spi-mem.h>
#include <linux/mfd/syscon.h>
/* NPCM7xx GCR module */
#define NPCM7XX_INTCR3_OFFSET 0x9C
#define NPCM7XX_INTCR3_FIU_FIX BIT(6)
/* Flash Interface Unit (FIU) Registers */
#define NPCM_FIU_DRD_CFG 0x00
#define NPCM_FIU_DWR_CFG 0x04
#define NPCM_FIU_UMA_CFG 0x08
#define NPCM_FIU_UMA_CTS 0x0C
#define NPCM_FIU_UMA_CMD 0x10
#define NPCM_FIU_UMA_ADDR 0x14
#define NPCM_FIU_PRT_CFG 0x18
#define NPCM_FIU_UMA_DW0 0x20
#define NPCM_FIU_UMA_DW1 0x24
#define NPCM_FIU_UMA_DW2 0x28
#define NPCM_FIU_UMA_DW3 0x2C
#define NPCM_FIU_UMA_DR0 0x30
#define NPCM_FIU_UMA_DR1 0x34
#define NPCM_FIU_UMA_DR2 0x38
#define NPCM_FIU_UMA_DR3 0x3C
#define NPCM_FIU_MAX_REG_LIMIT 0x80
/* FIU Direct Read Configuration Register */
#define NPCM_FIU_DRD_CFG_LCK BIT(31)
#define NPCM_FIU_DRD_CFG_R_BURST GENMASK(25, 24)
#define NPCM_FIU_DRD_CFG_ADDSIZ GENMASK(17, 16)
#define NPCM_FIU_DRD_CFG_DBW GENMASK(13, 12)
#define NPCM_FIU_DRD_CFG_ACCTYPE GENMASK(9, 8)
#define NPCM_FIU_DRD_CFG_RDCMD GENMASK(7, 0)
#define NPCM_FIU_DRD_ADDSIZ_SHIFT 16
#define NPCM_FIU_DRD_DBW_SHIFT 12
#define NPCM_FIU_DRD_ACCTYPE_SHIFT 8
/* FIU Direct Write Configuration Register */
#define NPCM_FIU_DWR_CFG_LCK BIT(31)
#define NPCM_FIU_DWR_CFG_W_BURST GENMASK(25, 24)
#define NPCM_FIU_DWR_CFG_ADDSIZ GENMASK(17, 16)
#define NPCM_FIU_DWR_CFG_ABPCK GENMASK(11, 10)
#define NPCM_FIU_DWR_CFG_DBPCK GENMASK(9, 8)
#define NPCM_FIU_DWR_CFG_WRCMD GENMASK(7, 0)
#define NPCM_FIU_DWR_ADDSIZ_SHIFT 16
#define NPCM_FIU_DWR_ABPCK_SHIFT 10
#define NPCM_FIU_DWR_DBPCK_SHIFT 8
/* FIU UMA Configuration Register */
#define NPCM_FIU_UMA_CFG_LCK BIT(31)
#define NPCM_FIU_UMA_CFG_CMMLCK BIT(30)
#define NPCM_FIU_UMA_CFG_RDATSIZ GENMASK(28, 24)
#define NPCM_FIU_UMA_CFG_DBSIZ GENMASK(23, 21)
#define NPCM_FIU_UMA_CFG_WDATSIZ GENMASK(20, 16)
#define NPCM_FIU_UMA_CFG_ADDSIZ GENMASK(13, 11)
#define NPCM_FIU_UMA_CFG_CMDSIZ BIT(10)
#define NPCM_FIU_UMA_CFG_RDBPCK GENMASK(9, 8)
#define NPCM_FIU_UMA_CFG_DBPCK GENMASK(7, 6)
#define NPCM_FIU_UMA_CFG_WDBPCK GENMASK(5, 4)
#define NPCM_FIU_UMA_CFG_ADBPCK GENMASK(3, 2)
#define NPCM_FIU_UMA_CFG_CMBPCK GENMASK(1, 0)
#define NPCM_FIU_UMA_CFG_ADBPCK_SHIFT 2
#define NPCM_FIU_UMA_CFG_WDBPCK_SHIFT 4
#define NPCM_FIU_UMA_CFG_DBPCK_SHIFT 6
#define NPCM_FIU_UMA_CFG_RDBPCK_SHIFT 8
#define NPCM_FIU_UMA_CFG_ADDSIZ_SHIFT 11
#define NPCM_FIU_UMA_CFG_WDATSIZ_SHIFT 16
#define NPCM_FIU_UMA_CFG_DBSIZ_SHIFT 21
#define NPCM_FIU_UMA_CFG_RDATSIZ_SHIFT 24
/* FIU UMA Control and Status Register */
#define NPCM_FIU_UMA_CTS_RDYIE BIT(25)
#define NPCM_FIU_UMA_CTS_RDYST BIT(24)
#define NPCM_FIU_UMA_CTS_SW_CS BIT(16)
#define NPCM_FIU_UMA_CTS_DEV_NUM GENMASK(9, 8)
#define NPCM_FIU_UMA_CTS_EXEC_DONE BIT(0)
#define NPCM_FIU_UMA_CTS_DEV_NUM_SHIFT 8
/* FIU UMA Command Register */
#define NPCM_FIU_UMA_CMD_DUM3 GENMASK(31, 24)
#define NPCM_FIU_UMA_CMD_DUM2 GENMASK(23, 16)
#define NPCM_FIU_UMA_CMD_DUM1 GENMASK(15, 8)
#define NPCM_FIU_UMA_CMD_CMD GENMASK(7, 0)
/* FIU UMA Address Register */
#define NPCM_FIU_UMA_ADDR_UMA_ADDR GENMASK(31, 0)
#define NPCM_FIU_UMA_ADDR_AB3 GENMASK(31, 24)
#define NPCM_FIU_UMA_ADDR_AB2 GENMASK(23, 16)
#define NPCM_FIU_UMA_ADDR_AB1 GENMASK(15, 8)
#define NPCM_FIU_UMA_ADDR_AB0 GENMASK(7, 0)
/* FIU UMA Write Data Bytes 0-3 Register */
#define NPCM_FIU_UMA_DW0_WB3 GENMASK(31, 24)
#define NPCM_FIU_UMA_DW0_WB2 GENMASK(23, 16)
#define NPCM_FIU_UMA_DW0_WB1 GENMASK(15, 8)
#define NPCM_FIU_UMA_DW0_WB0 GENMASK(7, 0)
/* FIU UMA Write Data Bytes 4-7 Register */
#define NPCM_FIU_UMA_DW1_WB7 GENMASK(31, 24)
#define NPCM_FIU_UMA_DW1_WB6 GENMASK(23, 16)
#define NPCM_FIU_UMA_DW1_WB5 GENMASK(15, 8)
#define NPCM_FIU_UMA_DW1_WB4 GENMASK(7, 0)
/* FIU UMA Write Data Bytes 8-11 Register */
#define NPCM_FIU_UMA_DW2_WB11 GENMASK(31, 24)
#define NPCM_FIU_UMA_DW2_WB10 GENMASK(23, 16)
#define NPCM_FIU_UMA_DW2_WB9 GENMASK(15, 8)
#define NPCM_FIU_UMA_DW2_WB8 GENMASK(7, 0)
/* FIU UMA Write Data Bytes 12-15 Register */
#define NPCM_FIU_UMA_DW3_WB15 GENMASK(31, 24)
#define NPCM_FIU_UMA_DW3_WB14 GENMASK(23, 16)
#define NPCM_FIU_UMA_DW3_WB13 GENMASK(15, 8)
#define NPCM_FIU_UMA_DW3_WB12 GENMASK(7, 0)
/* FIU UMA Read Data Bytes 0-3 Register */
#define NPCM_FIU_UMA_DR0_RB3 GENMASK(31, 24)
#define NPCM_FIU_UMA_DR0_RB2 GENMASK(23, 16)
#define NPCM_FIU_UMA_DR0_RB1 GENMASK(15, 8)
#define NPCM_FIU_UMA_DR0_RB0 GENMASK(7, 0)
/* FIU UMA Read Data Bytes 4-7 Register */
#define NPCM_FIU_UMA_DR1_RB15 GENMASK(31, 24)
#define NPCM_FIU_UMA_DR1_RB14 GENMASK(23, 16)
#define NPCM_FIU_UMA_DR1_RB13 GENMASK(15, 8)
#define NPCM_FIU_UMA_DR1_RB12 GENMASK(7, 0)
/* FIU UMA Read Data Bytes 8-11 Register */
#define NPCM_FIU_UMA_DR2_RB15 GENMASK(31, 24)
#define NPCM_FIU_UMA_DR2_RB14 GENMASK(23, 16)
#define NPCM_FIU_UMA_DR2_RB13 GENMASK(15, 8)
#define NPCM_FIU_UMA_DR2_RB12 GENMASK(7, 0)
/* FIU UMA Read Data Bytes 12-15 Register */
#define NPCM_FIU_UMA_DR3_RB15 GENMASK(31, 24)
#define NPCM_FIU_UMA_DR3_RB14 GENMASK(23, 16)
#define NPCM_FIU_UMA_DR3_RB13 GENMASK(15, 8)
#define NPCM_FIU_UMA_DR3_RB12 GENMASK(7, 0)
/* FIU Read Mode */
enum {
DRD_SINGLE_WIRE_MODE = 0,
DRD_DUAL_IO_MODE = 1,
DRD_QUAD_IO_MODE = 2,
DRD_SPI_X_MODE = 3,
};
enum {
DWR_ABPCK_BIT_PER_CLK = 0,
DWR_ABPCK_2_BIT_PER_CLK = 1,
DWR_ABPCK_4_BIT_PER_CLK = 2,
};
enum {
DWR_DBPCK_BIT_PER_CLK = 0,
DWR_DBPCK_2_BIT_PER_CLK = 1,
DWR_DBPCK_4_BIT_PER_CLK = 2,
};
#define NPCM_FIU_DRD_16_BYTE_BURST 0x3000000
#define NPCM_FIU_DWR_16_BYTE_BURST 0x3000000
#define MAP_SIZE_128MB 0x8000000
#define MAP_SIZE_16MB 0x1000000
#define MAP_SIZE_8MB 0x800000
#define NUM_BITS_IN_BYTE 8
#define FIU_DRD_MAX_DUMMY_NUMBER 3
#define NPCM_MAX_CHIP_NUM 4
#define CHUNK_SIZE 16
#define UMA_MICRO_SEC_TIMEOUT 150
enum {
FIU0 = 0,
FIU3,
FIUX,
};
struct npcm_fiu_info {
char *name;
u32 fiu_id;
u32 max_map_size;
u32 max_cs;
};
struct fiu_data {
const struct npcm_fiu_info *npcm_fiu_data_info;
int fiu_max;
};
static const struct npcm_fiu_info npxm7xx_fiu_info[] = {
{.name = "FIU0", .fiu_id = FIU0,
.max_map_size = MAP_SIZE_128MB, .max_cs = 2},
{.name = "FIU3", .fiu_id = FIU3,
.max_map_size = MAP_SIZE_128MB, .max_cs = 4},
{.name = "FIUX", .fiu_id = FIUX,
.max_map_size = MAP_SIZE_16MB, .max_cs = 2} };
static const struct fiu_data npxm7xx_fiu_data = {
.npcm_fiu_data_info = npxm7xx_fiu_info,
.fiu_max = 3,
};
struct npcm_fiu_spi;
struct npcm_fiu_chip {
void __iomem *flash_region_mapped_ptr;
struct npcm_fiu_spi *fiu;
unsigned long clkrate;
u32 chipselect;
};
struct npcm_fiu_spi {
struct npcm_fiu_chip chip[NPCM_MAX_CHIP_NUM];
const struct npcm_fiu_info *info;
struct spi_mem_op drd_op;
struct resource *res_mem;
struct regmap *regmap;
unsigned long clkrate;
struct device *dev;
struct clk *clk;
bool spix_mode;
};
static const struct regmap_config npcm_mtd_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.max_register = NPCM_FIU_MAX_REG_LIMIT,
};
static void npcm_fiu_set_drd(struct npcm_fiu_spi *fiu,
const struct spi_mem_op *op)
{
regmap_update_bits(fiu->regmap, NPCM_FIU_DRD_CFG,
NPCM_FIU_DRD_CFG_ACCTYPE,
ilog2(op->addr.buswidth) <<
NPCM_FIU_DRD_ACCTYPE_SHIFT);
fiu->drd_op.addr.buswidth = op->addr.buswidth;
regmap_update_bits(fiu->regmap, NPCM_FIU_DRD_CFG,
NPCM_FIU_DRD_CFG_DBW,
((op->dummy.nbytes * ilog2(op->addr.buswidth))
/ NUM_BITS_IN_BYTE) << NPCM_FIU_DRD_DBW_SHIFT);
fiu->drd_op.dummy.nbytes = op->dummy.nbytes;
regmap_update_bits(fiu->regmap, NPCM_FIU_DRD_CFG,
NPCM_FIU_DRD_CFG_RDCMD, op->cmd.opcode);
fiu->drd_op.cmd.opcode = op->cmd.opcode;
regmap_update_bits(fiu->regmap, NPCM_FIU_DRD_CFG,
NPCM_FIU_DRD_CFG_ADDSIZ,
(op->addr.nbytes - 3) << NPCM_FIU_DRD_ADDSIZ_SHIFT);
fiu->drd_op.addr.nbytes = op->addr.nbytes;
}
static ssize_t npcm_fiu_direct_read(struct spi_mem_dirmap_desc *desc,
u64 offs, size_t len, void *buf)
{
struct npcm_fiu_spi *fiu =
spi_controller_get_devdata(desc->mem->spi->master);
struct npcm_fiu_chip *chip = &fiu->chip[desc->mem->spi->chip_select];
void __iomem *src = (void __iomem *)(chip->flash_region_mapped_ptr +
offs);
u8 *buf_rx = buf;
u32 i;
if (fiu->spix_mode) {
for (i = 0 ; i < len ; i++)
*(buf_rx + i) = ioread8(src + i);
} else {
if (desc->info.op_tmpl.addr.buswidth != fiu->drd_op.addr.buswidth ||
desc->info.op_tmpl.dummy.nbytes != fiu->drd_op.dummy.nbytes ||
desc->info.op_tmpl.cmd.opcode != fiu->drd_op.cmd.opcode ||
desc->info.op_tmpl.addr.nbytes != fiu->drd_op.addr.nbytes)
npcm_fiu_set_drd(fiu, &desc->info.op_tmpl);
memcpy_fromio(buf_rx, src, len);
}
return len;
}
static ssize_t npcm_fiu_direct_write(struct spi_mem_dirmap_desc *desc,
u64 offs, size_t len, const void *buf)
{
struct npcm_fiu_spi *fiu =
spi_controller_get_devdata(desc->mem->spi->master);
struct npcm_fiu_chip *chip = &fiu->chip[desc->mem->spi->chip_select];
void __iomem *dst = (void __iomem *)(chip->flash_region_mapped_ptr +
offs);
const u8 *buf_tx = buf;
u32 i;
if (fiu->spix_mode)
for (i = 0 ; i < len ; i++)
iowrite8(*(buf_tx + i), dst + i);
else
memcpy_toio(dst, buf_tx, len);
return len;
}
static int npcm_fiu_uma_read(struct spi_mem *mem,
const struct spi_mem_op *op, u32 addr,
bool is_address_size, u8 *data, u32 data_size)
{
struct npcm_fiu_spi *fiu =
spi_controller_get_devdata(mem->spi->master);
u32 uma_cfg = BIT(10);
u32 data_reg[4];
int ret;
u32 val;
u32 i;
regmap_update_bits(fiu->regmap, NPCM_FIU_UMA_CTS,
NPCM_FIU_UMA_CTS_DEV_NUM,
(mem->spi->chip_select <<
NPCM_FIU_UMA_CTS_DEV_NUM_SHIFT));
regmap_update_bits(fiu->regmap, NPCM_FIU_UMA_CMD,
NPCM_FIU_UMA_CMD_CMD, op->cmd.opcode);
if (is_address_size) {
uma_cfg |= ilog2(op->cmd.buswidth);
uma_cfg |= ilog2(op->addr.buswidth)
<< NPCM_FIU_UMA_CFG_ADBPCK_SHIFT;
uma_cfg |= ilog2(op->dummy.buswidth)
<< NPCM_FIU_UMA_CFG_DBPCK_SHIFT;
uma_cfg |= ilog2(op->data.buswidth)
<< NPCM_FIU_UMA_CFG_RDBPCK_SHIFT;
uma_cfg |= op->dummy.nbytes << NPCM_FIU_UMA_CFG_DBSIZ_SHIFT;
uma_cfg |= op->addr.nbytes << NPCM_FIU_UMA_CFG_ADDSIZ_SHIFT;
regmap_write(fiu->regmap, NPCM_FIU_UMA_ADDR, addr);
} else {
regmap_write(fiu->regmap, NPCM_FIU_UMA_ADDR, 0x0);
}
uma_cfg |= data_size << NPCM_FIU_UMA_CFG_RDATSIZ_SHIFT;
regmap_write(fiu->regmap, NPCM_FIU_UMA_CFG, uma_cfg);
regmap_write_bits(fiu->regmap, NPCM_FIU_UMA_CTS,
NPCM_FIU_UMA_CTS_EXEC_DONE,
NPCM_FIU_UMA_CTS_EXEC_DONE);
ret = regmap_read_poll_timeout(fiu->regmap, NPCM_FIU_UMA_CTS, val,
(!(val & NPCM_FIU_UMA_CTS_EXEC_DONE)), 0,
UMA_MICRO_SEC_TIMEOUT);
if (ret)
return ret;
if (data_size) {
for (i = 0; i < DIV_ROUND_UP(data_size, 4); i++)
regmap_read(fiu->regmap, NPCM_FIU_UMA_DR0 + (i * 4),
&data_reg[i]);
memcpy(data, data_reg, data_size);
}
return 0;
}
static int npcm_fiu_uma_write(struct spi_mem *mem,
const struct spi_mem_op *op, u8 cmd,
bool is_address_size, u8 *data, u32 data_size)
{
struct npcm_fiu_spi *fiu =
spi_controller_get_devdata(mem->spi->master);
u32 uma_cfg = BIT(10);
u32 data_reg[4] = {0};
u32 val;
u32 i;
regmap_update_bits(fiu->regmap, NPCM_FIU_UMA_CTS,
NPCM_FIU_UMA_CTS_DEV_NUM,
(mem->spi->chip_select <<
NPCM_FIU_UMA_CTS_DEV_NUM_SHIFT));
regmap_update_bits(fiu->regmap, NPCM_FIU_UMA_CMD,
NPCM_FIU_UMA_CMD_CMD, cmd);
if (data_size) {
memcpy(data_reg, data, data_size);
for (i = 0; i < DIV_ROUND_UP(data_size, 4); i++)
regmap_write(fiu->regmap, NPCM_FIU_UMA_DW0 + (i * 4),
data_reg[i]);
}
if (is_address_size) {
uma_cfg |= ilog2(op->cmd.buswidth);
uma_cfg |= ilog2(op->addr.buswidth) <<
NPCM_FIU_UMA_CFG_ADBPCK_SHIFT;
uma_cfg |= ilog2(op->data.buswidth) <<
NPCM_FIU_UMA_CFG_WDBPCK_SHIFT;
uma_cfg |= op->addr.nbytes << NPCM_FIU_UMA_CFG_ADDSIZ_SHIFT;
regmap_write(fiu->regmap, NPCM_FIU_UMA_ADDR, op->addr.val);
} else {
regmap_write(fiu->regmap, NPCM_FIU_UMA_ADDR, 0x0);
}
uma_cfg |= (data_size << NPCM_FIU_UMA_CFG_WDATSIZ_SHIFT);
regmap_write(fiu->regmap, NPCM_FIU_UMA_CFG, uma_cfg);
regmap_write_bits(fiu->regmap, NPCM_FIU_UMA_CTS,
NPCM_FIU_UMA_CTS_EXEC_DONE,
NPCM_FIU_UMA_CTS_EXEC_DONE);
return regmap_read_poll_timeout(fiu->regmap, NPCM_FIU_UMA_CTS, val,
(!(val & NPCM_FIU_UMA_CTS_EXEC_DONE)), 0,
UMA_MICRO_SEC_TIMEOUT);
}
static int npcm_fiu_manualwrite(struct spi_mem *mem,
const struct spi_mem_op *op)
{
struct npcm_fiu_spi *fiu =
spi_controller_get_devdata(mem->spi->master);
u8 *data = (u8 *)op->data.buf.out;
u32 num_data_chunks;
u32 remain_data;
u32 idx = 0;
int ret;
num_data_chunks = op->data.nbytes / CHUNK_SIZE;
remain_data = op->data.nbytes % CHUNK_SIZE;
regmap_update_bits(fiu->regmap, NPCM_FIU_UMA_CTS,
NPCM_FIU_UMA_CTS_DEV_NUM,
(mem->spi->chip_select <<
NPCM_FIU_UMA_CTS_DEV_NUM_SHIFT));
regmap_update_bits(fiu->regmap, NPCM_FIU_UMA_CTS,
NPCM_FIU_UMA_CTS_SW_CS, 0);
ret = npcm_fiu_uma_write(mem, op, op->cmd.opcode, true, NULL, 0);
if (ret)
return ret;
/* Starting the data writing loop in multiples of 8 */
for (idx = 0; idx < num_data_chunks; ++idx) {
ret = npcm_fiu_uma_write(mem, op, data[0], false,
&data[1], CHUNK_SIZE - 1);
if (ret)
return ret;
data += CHUNK_SIZE;
}
/* Handling chunk remains */
if (remain_data > 0) {
ret = npcm_fiu_uma_write(mem, op, data[0], false,
&data[1], remain_data - 1);
if (ret)
return ret;
}
regmap_update_bits(fiu->regmap, NPCM_FIU_UMA_CTS,
NPCM_FIU_UMA_CTS_SW_CS, NPCM_FIU_UMA_CTS_SW_CS);
return 0;
}
static int npcm_fiu_read(struct spi_mem *mem, const struct spi_mem_op *op)
{
u8 *data = op->data.buf.in;
int i, readlen, currlen;
u8 *buf_ptr;
u32 addr;
int ret;
i = 0;
currlen = op->data.nbytes;
do {
addr = ((u32)op->addr.val + i);
if (currlen < 16)
readlen = currlen;
else
readlen = 16;
buf_ptr = data + i;
ret = npcm_fiu_uma_read(mem, op, addr, true, buf_ptr,
readlen);
if (ret)
return ret;
i += readlen;
currlen -= 16;
} while (currlen > 0);
return 0;
}
static void npcm_fiux_set_direct_wr(struct npcm_fiu_spi *fiu)
{
regmap_write(fiu->regmap, NPCM_FIU_DWR_CFG,
NPCM_FIU_DWR_16_BYTE_BURST);
regmap_update_bits(fiu->regmap, NPCM_FIU_DWR_CFG,
NPCM_FIU_DWR_CFG_ABPCK,
DWR_ABPCK_4_BIT_PER_CLK << NPCM_FIU_DWR_ABPCK_SHIFT);
regmap_update_bits(fiu->regmap, NPCM_FIU_DWR_CFG,
NPCM_FIU_DWR_CFG_DBPCK,
DWR_DBPCK_4_BIT_PER_CLK << NPCM_FIU_DWR_DBPCK_SHIFT);
}
static void npcm_fiux_set_direct_rd(struct npcm_fiu_spi *fiu)
{
u32 rx_dummy = 0;
regmap_write(fiu->regmap, NPCM_FIU_DRD_CFG,
NPCM_FIU_DRD_16_BYTE_BURST);
regmap_update_bits(fiu->regmap, NPCM_FIU_DRD_CFG,
NPCM_FIU_DRD_CFG_ACCTYPE,
DRD_SPI_X_MODE << NPCM_FIU_DRD_ACCTYPE_SHIFT);
regmap_update_bits(fiu->regmap, NPCM_FIU_DRD_CFG,
NPCM_FIU_DRD_CFG_DBW,
rx_dummy << NPCM_FIU_DRD_DBW_SHIFT);
}
static int npcm_fiu_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
{
struct npcm_fiu_spi *fiu =
spi_controller_get_devdata(mem->spi->master);
struct npcm_fiu_chip *chip = &fiu->chip[mem->spi->chip_select];
int ret = 0;
u8 *buf;
dev_dbg(fiu->dev, "cmd:%#x mode:%d.%d.%d.%d addr:%#llx len:%#x\n",
op->cmd.opcode, op->cmd.buswidth, op->addr.buswidth,
op->dummy.buswidth, op->data.buswidth, op->addr.val,
op->data.nbytes);
if (fiu->spix_mode || op->addr.nbytes > 4)
return -ENOTSUPP;
if (fiu->clkrate != chip->clkrate) {
ret = clk_set_rate(fiu->clk, chip->clkrate);
if (ret < 0)
dev_warn(fiu->dev, "Failed setting %lu frequency, stay at %lu frequency\n",
chip->clkrate, fiu->clkrate);
else
fiu->clkrate = chip->clkrate;
}
if (op->data.dir == SPI_MEM_DATA_IN) {
if (!op->addr.nbytes) {
buf = op->data.buf.in;
ret = npcm_fiu_uma_read(mem, op, op->addr.val, false,
buf, op->data.nbytes);
} else {
ret = npcm_fiu_read(mem, op);
}
} else {
if (!op->addr.nbytes && !op->data.nbytes)
ret = npcm_fiu_uma_write(mem, op, op->cmd.opcode, false,
NULL, 0);
if (op->addr.nbytes && !op->data.nbytes) {
int i;
u8 buf_addr[4];
u32 addr = op->addr.val;
for (i = op->addr.nbytes - 1; i >= 0; i--) {
buf_addr[i] = addr & 0xff;
addr >>= 8;
}
ret = npcm_fiu_uma_write(mem, op, op->cmd.opcode, false,
buf_addr, op->addr.nbytes);
}
if (!op->addr.nbytes && op->data.nbytes)
ret = npcm_fiu_uma_write(mem, op, op->cmd.opcode, false,
(u8 *)op->data.buf.out,
op->data.nbytes);
if (op->addr.nbytes && op->data.nbytes)
ret = npcm_fiu_manualwrite(mem, op);
}
return ret;
}
static int npcm_fiu_dirmap_create(struct spi_mem_dirmap_desc *desc)
{
struct npcm_fiu_spi *fiu =
spi_controller_get_devdata(desc->mem->spi->master);
struct npcm_fiu_chip *chip = &fiu->chip[desc->mem->spi->chip_select];
struct regmap *gcr_regmap;
if (!fiu->res_mem) {
dev_warn(fiu->dev, "Reserved memory not defined, direct read disabled\n");
desc->nodirmap = true;
return 0;
}
if (!fiu->spix_mode &&
desc->info.op_tmpl.data.dir == SPI_MEM_DATA_OUT) {
desc->nodirmap = true;
return 0;
}
if (!chip->flash_region_mapped_ptr) {
chip->flash_region_mapped_ptr =
devm_ioremap_nocache(fiu->dev, (fiu->res_mem->start +
(fiu->info->max_map_size *
desc->mem->spi->chip_select)),
(u32)desc->info.length);
if (!chip->flash_region_mapped_ptr) {
dev_warn(fiu->dev, "Error mapping memory region, direct read disabled\n");
desc->nodirmap = true;
return 0;
}
}
if (of_device_is_compatible(fiu->dev->of_node, "nuvoton,npcm750-fiu")) {
gcr_regmap =
syscon_regmap_lookup_by_compatible("nuvoton,npcm750-gcr");
if (IS_ERR(gcr_regmap)) {
dev_warn(fiu->dev, "Didn't find nuvoton,npcm750-gcr, direct read disabled\n");
desc->nodirmap = true;
return 0;
}
regmap_update_bits(gcr_regmap, NPCM7XX_INTCR3_OFFSET,
NPCM7XX_INTCR3_FIU_FIX,
NPCM7XX_INTCR3_FIU_FIX);
}
if (desc->info.op_tmpl.data.dir == SPI_MEM_DATA_IN) {
if (!fiu->spix_mode)
npcm_fiu_set_drd(fiu, &desc->info.op_tmpl);
else
npcm_fiux_set_direct_rd(fiu);
} else {
npcm_fiux_set_direct_wr(fiu);
}
return 0;
}
static int npcm_fiu_setup(struct spi_device *spi)
{
struct spi_controller *ctrl = spi->master;
struct npcm_fiu_spi *fiu = spi_controller_get_devdata(ctrl);
struct npcm_fiu_chip *chip;
chip = &fiu->chip[spi->chip_select];
chip->fiu = fiu;
chip->chipselect = spi->chip_select;
chip->clkrate = spi->max_speed_hz;
fiu->clkrate = clk_get_rate(fiu->clk);
return 0;
}
static const struct spi_controller_mem_ops npcm_fiu_mem_ops = {
.exec_op = npcm_fiu_exec_op,
.dirmap_create = npcm_fiu_dirmap_create,
.dirmap_read = npcm_fiu_direct_read,
.dirmap_write = npcm_fiu_direct_write,
};
static const struct of_device_id npcm_fiu_dt_ids[] = {
{ .compatible = "nuvoton,npcm750-fiu", .data = &npxm7xx_fiu_data },
{ /* sentinel */ }
};
static int npcm_fiu_probe(struct platform_device *pdev)
{
const struct fiu_data *fiu_data_match;
const struct of_device_id *match;
struct device *dev = &pdev->dev;
struct spi_controller *ctrl;
struct npcm_fiu_spi *fiu;
void __iomem *regbase;
struct resource *res;
int ret;
int id;
ctrl = spi_alloc_master(dev, sizeof(*fiu));
if (!ctrl)
return -ENOMEM;
fiu = spi_controller_get_devdata(ctrl);
match = of_match_device(npcm_fiu_dt_ids, dev);
if (!match || !match->data) {
dev_err(dev, "No compatible OF match\n");
return -ENODEV;
}
fiu_data_match = match->data;
id = of_alias_get_id(dev->of_node, "fiu");
if (id < 0 || id >= fiu_data_match->fiu_max) {
dev_err(dev, "Invalid platform device id: %d\n", id);
return -EINVAL;
}
fiu->info = &fiu_data_match->npcm_fiu_data_info[id];
platform_set_drvdata(pdev, fiu);
fiu->dev = dev;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "control");
regbase = devm_ioremap_resource(dev, res);
if (IS_ERR(regbase))
return PTR_ERR(regbase);
fiu->regmap = devm_regmap_init_mmio(dev, regbase,
&npcm_mtd_regmap_config);
if (IS_ERR(fiu->regmap)) {
dev_err(dev, "Failed to create regmap\n");
return PTR_ERR(fiu->regmap);
}
fiu->res_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"memory");
fiu->clk = devm_clk_get(dev, NULL);
if (IS_ERR(fiu->clk))
return PTR_ERR(fiu->clk);
fiu->spix_mode = of_property_read_bool(dev->of_node,
"nuvoton,spix-mode");
platform_set_drvdata(pdev, fiu);
clk_prepare_enable(fiu->clk);
ctrl->mode_bits = SPI_RX_DUAL | SPI_RX_QUAD
| SPI_TX_DUAL | SPI_TX_QUAD;
ctrl->setup = npcm_fiu_setup;
ctrl->bus_num = -1;
ctrl->mem_ops = &npcm_fiu_mem_ops;
ctrl->num_chipselect = fiu->info->max_cs;
ctrl->dev.of_node = dev->of_node;
ret = devm_spi_register_master(dev, ctrl);
if (ret)
return ret;
return 0;
}
static int npcm_fiu_remove(struct platform_device *pdev)
{
struct npcm_fiu_spi *fiu = platform_get_drvdata(pdev);
clk_disable_unprepare(fiu->clk);
return 0;
}
MODULE_DEVICE_TABLE(of, npcm_fiu_dt_ids);
static struct platform_driver npcm_fiu_driver = {
.driver = {
.name = "NPCM-FIU",
.bus = &platform_bus_type,
.of_match_table = npcm_fiu_dt_ids,
},
.probe = npcm_fiu_probe,
.remove = npcm_fiu_remove,
};
module_platform_driver(npcm_fiu_driver);
MODULE_DESCRIPTION("Nuvoton FLASH Interface Unit SPI Controller Driver");
MODULE_AUTHOR("Tomer Maimon <tomer.maimon@nuvoton.com>");
MODULE_LICENSE("GPL v2");

5
drivers/spi/spi-npcm-pspi.c
View File

@ -341,7 +341,6 @@ static int npcm_pspi_probe(struct platform_device *pdev)
{
struct npcm_pspi *priv;
struct spi_master *master;
struct resource *res;
unsigned long clk_hz;
struct device_node *np = pdev->dev.of_node;
int num_cs, i;
@ -368,8 +367,7 @@ static int npcm_pspi_probe(struct platform_device *pdev)
priv->is_save_param = false;
priv->id = pdev->id;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
priv->base = devm_ioremap_resource(&pdev->dev, res);
priv->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(priv->base)) {
ret = PTR_ERR(priv->base);
goto out_master_put;
@ -388,7 +386,6 @@ static int npcm_pspi_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "failed to get IRQ\n");
ret = irq;
goto out_disable_clk;
}

5
drivers/spi/spi-nuc900.c
View File

@ -327,7 +327,6 @@ static int nuc900_spi_probe(struct platform_device *pdev)
{
struct nuc900_spi *hw;
struct spi_master *master;
struct resource *res;
int err = 0;
master = spi_alloc_master(&pdev->dev, sizeof(struct nuc900_spi));
@ -358,8 +357,7 @@ static int nuc900_spi_probe(struct platform_device *pdev)
hw->bitbang.chipselect = nuc900_spi_chipsel;
hw->bitbang.txrx_bufs = nuc900_spi_txrx;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hw->regs = devm_ioremap_resource(&pdev->dev, res);
hw->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(hw->regs)) {
err = PTR_ERR(hw->regs);
goto err_pdata;
@ -367,7 +365,6 @@ static int nuc900_spi_probe(struct platform_device *pdev)
hw->irq = platform_get_irq(pdev, 0);
if (hw->irq < 0) {
dev_err(&pdev->dev, "No IRQ specified\n");
err = -ENOENT;
goto err_pdata;
}

4
drivers/spi/spi-nxp-fspi.c
View File

@ -1007,10 +1007,8 @@ static int nxp_fspi_probe(struct platform_device *pdev)
/* find the irq */
ret = platform_get_irq(pdev, 0);
if (ret < 0) {
dev_err(dev, "failed to get the irq: %d\n", ret);
if (ret < 0)
goto err_disable_clk;
}
ret = devm_request_irq(dev, ret,
nxp_fspi_irq_handler, 0, pdev->name, f);

4
drivers/spi/spi-oc-tiny.c
View File

@ -240,7 +240,6 @@ static int tiny_spi_probe(struct platform_device *pdev)
struct tiny_spi_platform_data *platp = dev_get_platdata(&pdev->dev);
struct tiny_spi *hw;
struct spi_master *master;
struct resource *res;
unsigned int i;
int err = -ENODEV;
@ -264,8 +263,7 @@ static int tiny_spi_probe(struct platform_device *pdev)
hw->bitbang.txrx_bufs = tiny_spi_txrx_bufs;
/* find and map our resources */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hw->base = devm_ioremap_resource(&pdev->dev, res);
hw->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(hw->base)) {
err = PTR_ERR(hw->base);
goto exit;

5
drivers/spi/spi-pic32-sqi.c
View File

@ -570,7 +570,6 @@ static int pic32_sqi_probe(struct platform_device *pdev)
{
struct spi_master *master;
struct pic32_sqi *sqi;
struct resource *reg;
int ret;
master = spi_alloc_master(&pdev->dev, sizeof(*sqi));
@ -580,8 +579,7 @@ static int pic32_sqi_probe(struct platform_device *pdev)
sqi = spi_master_get_devdata(master);
sqi->master = master;
reg = platform_get_resource(pdev, IORESOURCE_MEM, 0);
sqi->regs = devm_ioremap_resource(&pdev->dev, reg);
sqi->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(sqi->regs)) {
ret = PTR_ERR(sqi->regs);
goto err_free_master;
@ -590,7 +588,6 @@ static int pic32_sqi_probe(struct platform_device *pdev)
/* irq */
sqi->irq = platform_get_irq(pdev, 0);
if (sqi->irq < 0) {
dev_err(&pdev->dev, "no irq found\n");
ret = sqi->irq;
goto err_free_master;
}

12
drivers/spi/spi-pic32.c
View File

@ -711,22 +711,16 @@ static int pic32_spi_hw_probe(struct platform_device *pdev,
/* get irq resources: err-irq, rx-irq, tx-irq */
pic32s->fault_irq = platform_get_irq_byname(pdev, "fault");
if (pic32s->fault_irq < 0) {
dev_err(&pdev->dev, "fault-irq not found\n");
if (pic32s->fault_irq < 0)
return pic32s->fault_irq;
}
pic32s->rx_irq = platform_get_irq_byname(pdev, "rx");
if (pic32s->rx_irq < 0) {
dev_err(&pdev->dev, "rx-irq not found\n");
if (pic32s->rx_irq < 0)
return pic32s->rx_irq;
}
pic32s->tx_irq = platform_get_irq_byname(pdev, "tx");
if (pic32s->tx_irq < 0) {
dev_err(&pdev->dev, "tx-irq not found\n");
if (pic32s->tx_irq < 0)
return pic32s->tx_irq;
}
/* get clock */
pic32s->clk = devm_clk_get(&pdev->dev, "mck0");

8
drivers/spi/spi-qcom-qspi.c
View File

@ -424,7 +424,6 @@ static int qcom_qspi_probe(struct platform_device *pdev)
{
int ret;
struct device *dev;
struct resource *res;
struct spi_master *master;
struct qcom_qspi *ctrl;
@ -440,8 +439,7 @@ static int qcom_qspi_probe(struct platform_device *pdev)
spin_lock_init(&ctrl->lock);
ctrl->dev = dev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ctrl->base = devm_ioremap_resource(dev, res);
ctrl->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(ctrl->base)) {
ret = PTR_ERR(ctrl->base);
goto exit_probe_master_put;
@ -454,10 +452,8 @@ static int qcom_qspi_probe(struct platform_device *pdev)
goto exit_probe_master_put;
ret = platform_get_irq(pdev, 0);
if (ret < 0) {
dev_err(dev, "Failed to get irq %d\n", ret);
if (ret < 0)
goto exit_probe_master_put;
}
ret = devm_request_irq(dev, ret, qcom_qspi_irq,
IRQF_TRIGGER_HIGH, dev_name(dev), ctrl);
if (ret) {

4
drivers/spi/spi-rb4xx.c
View File

@ -135,12 +135,10 @@ static int rb4xx_spi_probe(struct platform_device *pdev)
struct spi_master *master;
struct clk *ahb_clk;
struct rb4xx_spi *rbspi;
struct resource *r;
int err;
void __iomem *spi_base;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
spi_base = devm_ioremap_resource(&pdev->dev, r);
spi_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(spi_base))
return PTR_ERR(spi_base);

5
drivers/spi/spi-s3c24xx.c
View File

@ -487,7 +487,6 @@ static int s3c24xx_spi_probe(struct platform_device *pdev)
struct s3c2410_spi_info *pdata;
struct s3c24xx_spi *hw;
struct spi_master *master;
struct resource *res;
int err = 0;
master = spi_alloc_master(&pdev->dev, sizeof(struct s3c24xx_spi));
@ -536,8 +535,7 @@ static int s3c24xx_spi_probe(struct platform_device *pdev)
dev_dbg(hw->dev, "bitbang at %p\n", &hw->bitbang);
/* find and map our resources */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hw->regs = devm_ioremap_resource(&pdev->dev, res);
hw->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(hw->regs)) {
err = PTR_ERR(hw->regs);
goto err_no_pdata;
@ -545,7 +543,6 @@ static int s3c24xx_spi_probe(struct platform_device *pdev)
hw->irq = platform_get_irq(pdev, 0);
if (hw->irq < 0) {
dev_err(&pdev->dev, "No IRQ specified\n");
err = -ENOENT;
goto err_no_pdata;
}

5
drivers/spi/spi-sh-msiof.c
View File

@ -1297,7 +1297,6 @@ static void sh_msiof_release_dma(struct sh_msiof_spi_priv *p)
static int sh_msiof_spi_probe(struct platform_device *pdev)
{
struct resource *r;
struct spi_controller *ctlr;
const struct sh_msiof_chipdata *chipdata;
struct sh_msiof_spi_info *info;
@ -1346,13 +1345,11 @@ static int sh_msiof_spi_probe(struct platform_device *pdev)
i = platform_get_irq(pdev, 0);
if (i < 0) {
dev_err(&pdev->dev, "cannot get IRQ\n");
ret = i;
goto err1;
}
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
p->mapbase = devm_ioremap_resource(&pdev->dev, r);
p->mapbase = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(p->mapbase)) {
ret = PTR_ERR(p->mapbase);
goto err1;

4
drivers/spi/spi-sh.c
View File

@ -437,10 +437,8 @@ static int spi_sh_probe(struct platform_device *pdev)
}
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "platform_get_irq error: %d\n", irq);
if (irq < 0)
return irq;
}
master = spi_alloc_master(&pdev->dev, sizeof(struct spi_sh_data));
if (master == NULL) {

5
drivers/spi/spi-sifive.c
View File

@ -292,7 +292,6 @@ sifive_spi_transfer_one(struct spi_master *master, struct spi_device *device,
static int sifive_spi_probe(struct platform_device *pdev)
{
struct sifive_spi *spi;
struct resource *res;
int ret, irq, num_cs;
u32 cs_bits, max_bits_per_word;
struct spi_master *master;
@ -307,8 +306,7 @@ static int sifive_spi_probe(struct platform_device *pdev)
init_completion(&spi->done);
platform_set_drvdata(pdev, master);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
spi->regs = devm_ioremap_resource(&pdev->dev, res);
spi->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(spi->regs)) {
ret = PTR_ERR(spi->regs);
goto put_master;
@ -323,7 +321,6 @@ static int sifive_spi_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "Unable to find interrupt\n");
ret = irq;
goto put_master;
}

4
drivers/spi/spi-sirf.c
View File

@ -1070,7 +1070,6 @@ static int spi_sirfsoc_probe(struct platform_device *pdev)
{
struct sirfsoc_spi *sspi;
struct spi_master *master;
struct resource *mem_res;
const struct sirf_spi_comp_data *spi_comp_data;
int irq;
int ret;
@ -1097,8 +1096,7 @@ static int spi_sirfsoc_probe(struct platform_device *pdev)
sspi->fifo_level_chk_mask = (sspi->fifo_size / 4) - 1;
sspi->dat_max_frm_len = spi_comp_data->dat_max_frm_len;
sspi->fifo_size = spi_comp_data->fifo_size;
mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
sspi->base = devm_ioremap_resource(&pdev->dev, mem_res);
sspi->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(sspi->base)) {
ret = PTR_ERR(sspi->base);
goto free_master;

1
drivers/spi/spi-slave-mt27xx.c
View File

@ -410,7 +410,6 @@ static int mtk_spi_slave_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "failed to get irq (%d)\n", irq);
ret = irq;
goto err_put_ctlr;
}

90
drivers/spi/spi-sprd-adi.c
View File

@ -86,6 +86,7 @@
#define BIT_WDG_EN BIT(2)
/* Definition of PMIC reset status register */
#define HWRST_STATUS_SECURITY 0x02
#define HWRST_STATUS_RECOVERY 0x20
#define HWRST_STATUS_NORMAL 0x40
#define HWRST_STATUS_ALARM 0x50
@ -97,6 +98,8 @@
#define HWRST_STATUS_AUTODLOADER 0xa0
#define HWRST_STATUS_IQMODE 0xb0
#define HWRST_STATUS_SPRDISK 0xc0
#define HWRST_STATUS_FACTORYTEST 0xe0
#define HWRST_STATUS_WATCHDOG 0xf0
/* Use default timeout 50 ms that converts to watchdog values */
#define WDG_LOAD_VAL ((50 * 1000) / 32768)
@ -162,14 +165,16 @@ static int sprd_adi_read(struct sprd_adi *sadi, u32 reg_paddr, u32 *read_val)
int read_timeout = ADI_READ_TIMEOUT;
unsigned long flags;
u32 val, rd_addr;
int ret;
int ret = 0;
ret = hwspin_lock_timeout_irqsave(sadi->hwlock,
ADI_HWSPINLOCK_TIMEOUT,
&flags);
if (ret) {
dev_err(sadi->dev, "get the hw lock failed\n");
return ret;
if (sadi->hwlock) {
ret = hwspin_lock_timeout_irqsave(sadi->hwlock,
ADI_HWSPINLOCK_TIMEOUT,
&flags);
if (ret) {
dev_err(sadi->dev, "get the hw lock failed\n");
return ret;
}
}
/*
@ -216,7 +221,8 @@ static int sprd_adi_read(struct sprd_adi *sadi, u32 reg_paddr, u32 *read_val)
*read_val = val & RD_VALUE_MASK;
out:
hwspin_unlock_irqrestore(sadi->hwlock, &flags);
if (sadi->hwlock)
hwspin_unlock_irqrestore(sadi->hwlock, &flags);
return ret;
}
@ -227,12 +233,14 @@ static int sprd_adi_write(struct sprd_adi *sadi, u32 reg_paddr, u32 val)
unsigned long flags;
int ret;
ret = hwspin_lock_timeout_irqsave(sadi->hwlock,
ADI_HWSPINLOCK_TIMEOUT,
&flags);
if (ret) {
dev_err(sadi->dev, "get the hw lock failed\n");
return ret;
if (sadi->hwlock) {
ret = hwspin_lock_timeout_irqsave(sadi->hwlock,
ADI_HWSPINLOCK_TIMEOUT,
&flags);
if (ret) {
dev_err(sadi->dev, "get the hw lock failed\n");
return ret;
}
}
ret = sprd_adi_drain_fifo(sadi);
@ -258,7 +266,8 @@ static int sprd_adi_write(struct sprd_adi *sadi, u32 reg_paddr, u32 val)
}
out:
hwspin_unlock_irqrestore(sadi->hwlock, &flags);
if (sadi->hwlock)
hwspin_unlock_irqrestore(sadi->hwlock, &flags);
return ret;
}
@ -307,6 +316,18 @@ static int sprd_adi_transfer_one(struct spi_controller *ctlr,
return 0;
}
static void sprd_adi_set_wdt_rst_mode(struct sprd_adi *sadi)
{
#ifdef CONFIG_SPRD_WATCHDOG
u32 val;
/* Set default watchdog reboot mode */
sprd_adi_read(sadi, sadi->slave_pbase + PMIC_RST_STATUS, &val);
val |= HWRST_STATUS_WATCHDOG;
sprd_adi_write(sadi, sadi->slave_pbase + PMIC_RST_STATUS, val);
#endif
}
static int sprd_adi_restart_handler(struct notifier_block *this,
unsigned long mode, void *cmd)
{
@ -336,11 +357,16 @@ static int sprd_adi_restart_handler(struct notifier_block *this,
reboot_mode = HWRST_STATUS_IQMODE;
else if (!strncmp(cmd, "sprdisk", 7))
reboot_mode = HWRST_STATUS_SPRDISK;
else if (!strncmp(cmd, "tospanic", 8))
reboot_mode = HWRST_STATUS_SECURITY;
else if (!strncmp(cmd, "factorytest", 11))
reboot_mode = HWRST_STATUS_FACTORYTEST;
else
reboot_mode = HWRST_STATUS_NORMAL;
/* Record the reboot mode */
sprd_adi_read(sadi, sadi->slave_pbase + PMIC_RST_STATUS, &val);
val &= ~HWRST_STATUS_WATCHDOG;
val |= reboot_mode;
sprd_adi_write(sadi, sadi->slave_pbase + PMIC_RST_STATUS, val);
@ -380,9 +406,6 @@ static void sprd_adi_hw_init(struct sprd_adi *sadi)
const __be32 *list;
u32 tmp;
/* Address bits select default 12 bits */
writel_relaxed(0, sadi->base + REG_ADI_CTRL0);
/* Set all channels as default priority */
writel_relaxed(0, sadi->base + REG_ADI_CHN_PRIL);
writel_relaxed(0, sadi->base + REG_ADI_CHN_PRIH);
@ -459,19 +482,30 @@ static int sprd_adi_probe(struct platform_device *pdev)
sadi->slave_pbase = res->start + ADI_SLAVE_OFFSET;
sadi->ctlr = ctlr;
sadi->dev = &pdev->dev;
ret = of_hwspin_lock_get_id_byname(np, "adi");
if (ret < 0) {
dev_err(&pdev->dev, "can not get the hardware spinlock\n");
goto put_ctlr;
}
sadi->hwlock = devm_hwspin_lock_request_specific(&pdev->dev, ret);
if (!sadi->hwlock) {
ret = -ENXIO;
goto put_ctlr;
ret = of_hwspin_lock_get_id(np, 0);
if (ret > 0 || (IS_ENABLED(CONFIG_HWSPINLOCK) && ret == 0)) {
sadi->hwlock =
devm_hwspin_lock_request_specific(&pdev->dev, ret);
if (!sadi->hwlock) {
ret = -ENXIO;
goto put_ctlr;
}
} else {
switch (ret) {
case -ENOENT:
dev_info(&pdev->dev, "no hardware spinlock supplied\n");
break;
default:
dev_err(&pdev->dev,
"failed to find hwlock id, %d\n", ret);
/* fall-through */
case -EPROBE_DEFER:
goto put_ctlr;
}
}
sprd_adi_hw_init(sadi);
sprd_adi_set_wdt_rst_mode(sadi);
ctlr->dev.of_node = pdev->dev.of_node;
ctlr->bus_num = pdev->id;

4
drivers/spi/spi-sprd.c
View File

@ -843,10 +843,8 @@ static int sprd_spi_irq_init(struct platform_device *pdev, struct sprd_spi *ss)
int ret;
ss->irq = platform_get_irq(pdev, 0);
if (ss->irq < 0) {
dev_err(&pdev->dev, "failed to get irq resource\n");
if (ss->irq < 0)
return ss->irq;
}
ret = devm_request_irq(&pdev->dev, ss->irq, sprd_spi_handle_irq,
0, pdev->name, ss);

4
drivers/spi/spi-st-ssc4.c
View File

@ -298,7 +298,6 @@ static int spi_st_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct spi_master *master;
struct resource *res;
struct spi_st *spi_st;
int irq, ret = 0;
u32 var;
@ -331,8 +330,7 @@ static int spi_st_probe(struct platform_device *pdev)
init_completion(&spi_st->done);
/* Get resources */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
spi_st->base = devm_ioremap_resource(&pdev->dev, res);
spi_st->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(spi_st->base)) {
ret = PTR_ERR(spi_st->base);
goto clk_disable;

5
drivers/spi/spi-stm32-qspi.c
View File

@ -570,11 +570,8 @@ static int stm32_qspi_probe(struct platform_device *pdev)
}
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
if (irq != -EPROBE_DEFER)
dev_err(dev, "IRQ error missing or invalid\n");
if (irq < 0)
return irq;
}
ret = devm_request_irq(dev, irq, stm32_qspi_irq, 0,
dev_name(dev), qspi);

5
drivers/spi/spi-sun4i.c
View File

@ -428,7 +428,6 @@ static int sun4i_spi_probe(struct platform_device *pdev)
{
struct spi_master *master;
struct sun4i_spi *sspi;
struct resource *res;
int ret = 0, irq;
master = spi_alloc_master(&pdev->dev, sizeof(struct sun4i_spi));
@ -440,8 +439,7 @@ static int sun4i_spi_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, master);
sspi = spi_master_get_devdata(master);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
sspi->base_addr = devm_ioremap_resource(&pdev->dev, res);
sspi->base_addr = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(sspi->base_addr)) {
ret = PTR_ERR(sspi->base_addr);
goto err_free_master;
@ -449,7 +447,6 @@ static int sun4i_spi_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "No spi IRQ specified\n");
ret = -ENXIO;
goto err_free_master;
}

5
drivers/spi/spi-sun6i.c
View File

@ -435,7 +435,6 @@ static int sun6i_spi_probe(struct platform_device *pdev)
{
struct spi_master *master;
struct sun6i_spi *sspi;
struct resource *res;
int ret = 0, irq;
master = spi_alloc_master(&pdev->dev, sizeof(struct sun6i_spi));
@ -447,8 +446,7 @@ static int sun6i_spi_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, master);
sspi = spi_master_get_devdata(master);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
sspi->base_addr = devm_ioremap_resource(&pdev->dev, res);
sspi->base_addr = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(sspi->base_addr)) {
ret = PTR_ERR(sspi->base_addr);
goto err_free_master;
@ -456,7 +454,6 @@ static int sun6i_spi_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "No spi IRQ specified\n");
ret = -ENXIO;
goto err_free_master;
}

2
drivers/spi/spi-synquacer.c
View File

@ -670,7 +670,6 @@ static int synquacer_spi_probe(struct platform_device *pdev)
rx_irq = platform_get_irq(pdev, 0);
if (rx_irq <= 0) {
dev_err(&pdev->dev, "get rx_irq failed (%d)\n", rx_irq);
ret = rx_irq;
goto put_spi;
}
@ -685,7 +684,6 @@ static int synquacer_spi_probe(struct platform_device *pdev)
tx_irq = platform_get_irq(pdev, 1);
if (tx_irq <= 0) {
dev_err(&pdev->dev, "get tx_irq failed (%d)\n", tx_irq);
ret = tx_irq;
goto put_spi;
}

4
drivers/spi/spi-tegra20-sflash.c
View File

@ -419,7 +419,6 @@ static int tegra_sflash_probe(struct platform_device *pdev)
{
struct spi_master *master;
struct tegra_sflash_data *tsd;
struct resource *r;
int ret;
const struct of_device_id *match;
@ -451,8 +450,7 @@ static int tegra_sflash_probe(struct platform_device *pdev)
&master->max_speed_hz))
master->max_speed_hz = 25000000; /* 25MHz */
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
tsd->base = devm_ioremap_resource(&pdev->dev, r);
tsd->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(tsd->base)) {
ret = PTR_ERR(tsd->base);
goto exit_free_master;

1
drivers/spi/spi-ti-qspi.c
View File

@ -717,7 +717,6 @@ static int ti_qspi_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "no irq resource?\n");
ret = irq;
goto free_master;
}

90
drivers/spi/spi-uniphier.c
View File

@ -7,6 +7,7 @@
#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
@ -16,6 +17,7 @@
#include <asm/unaligned.h>
#define SSI_TIMEOUT_MS 2000
#define SSI_POLL_TIMEOUT_US 200
#define SSI_MAX_CLK_DIVIDER 254
#define SSI_MIN_CLK_DIVIDER 4
@ -214,6 +216,7 @@ static void uniphier_spi_setup_transfer(struct spi_device *spi,
if (!priv->is_save_param || priv->mode != spi->mode) {
uniphier_spi_set_mode(spi);
priv->mode = spi->mode;
priv->is_save_param = false;
}
if (!priv->is_save_param || priv->bits_per_word != t->bits_per_word) {
@ -226,8 +229,7 @@ static void uniphier_spi_setup_transfer(struct spi_device *spi,
priv->speed_hz = t->speed_hz;
}
if (!priv->is_save_param)
priv->is_save_param = true;
priv->is_save_param = true;
/* reset FIFOs */
val = SSI_FC_TXFFL | SSI_FC_RXFFL;
@ -290,21 +292,23 @@ static void uniphier_spi_recv(struct uniphier_spi_priv *priv)
static void uniphier_spi_fill_tx_fifo(struct uniphier_spi_priv *priv)
{
unsigned int tx_count;
unsigned int fifo_threshold, fill_bytes;
u32 val;
tx_count = DIV_ROUND_UP(priv->tx_bytes,
fifo_threshold = DIV_ROUND_UP(priv->rx_bytes,
bytes_per_word(priv->bits_per_word));
tx_count = min(tx_count, SSI_FIFO_DEPTH);
fifo_threshold = min(fifo_threshold, SSI_FIFO_DEPTH);
fill_bytes = fifo_threshold - (priv->rx_bytes - priv->tx_bytes);
/* set fifo threshold */
val = readl(priv->base + SSI_FC);
val &= ~(SSI_FC_TXFTH_MASK | SSI_FC_RXFTH_MASK);
val |= FIELD_PREP(SSI_FC_TXFTH_MASK, tx_count);
val |= FIELD_PREP(SSI_FC_RXFTH_MASK, tx_count);
val |= FIELD_PREP(SSI_FC_TXFTH_MASK, fifo_threshold);
val |= FIELD_PREP(SSI_FC_RXFTH_MASK, fifo_threshold);
writel(val, priv->base + SSI_FC);
while (tx_count--)
while (fill_bytes--)
uniphier_spi_send(priv);
}
@ -323,20 +327,14 @@ static void uniphier_spi_set_cs(struct spi_device *spi, bool enable)
writel(val, priv->base + SSI_FPS);
}
static int uniphier_spi_transfer_one(struct spi_master *master,
struct spi_device *spi,
struct spi_transfer *t)
static int uniphier_spi_transfer_one_irq(struct spi_master *master,
struct spi_device *spi,
struct spi_transfer *t)
{
struct uniphier_spi_priv *priv = spi_master_get_devdata(master);
struct device *dev = master->dev.parent;
unsigned long time_left;
/* Terminate and return success for 0 byte length transfer */
if (!t->len)
return 0;
uniphier_spi_setup_transfer(spi, t);
reinit_completion(&priv->xfer_done);
uniphier_spi_fill_tx_fifo(priv);
@ -356,6 +354,59 @@ static int uniphier_spi_transfer_one(struct spi_master *master,
return priv->error;
}
static int uniphier_spi_transfer_one_poll(struct spi_master *master,
struct spi_device *spi,
struct spi_transfer *t)
{
struct uniphier_spi_priv *priv = spi_master_get_devdata(master);
int loop = SSI_POLL_TIMEOUT_US * 10;
while (priv->tx_bytes) {
uniphier_spi_fill_tx_fifo(priv);
while ((priv->rx_bytes - priv->tx_bytes) > 0) {
while (!(readl(priv->base + SSI_SR) & SSI_SR_RNE)
&& loop--)
ndelay(100);
if (loop == -1)
goto irq_transfer;
uniphier_spi_recv(priv);
}
}
return 0;
irq_transfer:
return uniphier_spi_transfer_one_irq(master, spi, t);
}
static int uniphier_spi_transfer_one(struct spi_master *master,
struct spi_device *spi,
struct spi_transfer *t)
{
struct uniphier_spi_priv *priv = spi_master_get_devdata(master);
unsigned long threshold;
/* Terminate and return success for 0 byte length transfer */
if (!t->len)
return 0;
uniphier_spi_setup_transfer(spi, t);
/*
* If the transfer operation will take longer than
* SSI_POLL_TIMEOUT_US, it should use irq.
*/
threshold = DIV_ROUND_UP(SSI_POLL_TIMEOUT_US * priv->speed_hz,
USEC_PER_SEC * BITS_PER_BYTE);
if (t->len > threshold)
return uniphier_spi_transfer_one_irq(master, spi, t);
else
return uniphier_spi_transfer_one_poll(master, spi, t);
}
static int uniphier_spi_prepare_transfer_hardware(struct spi_master *master)
{
struct uniphier_spi_priv *priv = spi_master_get_devdata(master);
@ -419,7 +470,6 @@ static int uniphier_spi_probe(struct platform_device *pdev)
{
struct uniphier_spi_priv *priv;
struct spi_master *master;
struct resource *res;
unsigned long clk_rate;
int irq;
int ret;
@ -434,8 +484,7 @@ static int uniphier_spi_probe(struct platform_device *pdev)
priv->master = master;
priv->is_save_param = false;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
priv->base = devm_ioremap_resource(&pdev->dev, res);
priv->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(priv->base)) {
ret = PTR_ERR(priv->base);
goto out_master_put;
@ -454,7 +503,6 @@ static int uniphier_spi_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "failed to get IRQ\n");
ret = irq;
goto out_disable_clk;
}

8
drivers/spi/spi-xlp.c
View File

@ -370,7 +370,6 @@ static int xlp_spi_probe(struct platform_device *pdev)
{
struct spi_master *master;
struct xlp_spi_priv *xspi;
struct resource *res;
struct clk *clk;
int irq, err;
@ -378,16 +377,13 @@ static int xlp_spi_probe(struct platform_device *pdev)
if (!xspi)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
xspi->base = devm_ioremap_resource(&pdev->dev, res);
xspi->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(xspi->base))
return PTR_ERR(xspi->base);
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "no IRQ resource found: %d\n", irq);
if (irq < 0)
return irq;
}
err = devm_request_irq(&pdev->dev, irq, xlp_spi_interrupt, 0,
pdev->name, xspi);
if (err) {

7
drivers/spi/spi-zynq-qspi.c
View File

@ -620,7 +620,6 @@ static int zynq_qspi_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct zynq_qspi *xqspi;
struct resource *res;
u32 num_cs;
ctlr = spi_alloc_master(&pdev->dev, sizeof(*xqspi));
@ -630,8 +629,7 @@ static int zynq_qspi_probe(struct platform_device *pdev)
xqspi = spi_controller_get_devdata(ctlr);
xqspi->dev = dev;
platform_set_drvdata(pdev, xqspi);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
xqspi->regs = devm_ioremap_resource(&pdev->dev, res);
xqspi->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(xqspi->regs)) {
ret = PTR_ERR(xqspi->regs);
goto remove_master;
@ -671,7 +669,6 @@ static int zynq_qspi_probe(struct platform_device *pdev)
xqspi->irq = platform_get_irq(pdev, 0);
if (xqspi->irq <= 0) {
ret = -ENXIO;
dev_err(&pdev->dev, "irq resource not found\n");
goto remove_master;
}
ret = devm_request_irq(&pdev->dev, xqspi->irq, zynq_qspi_irq,
@ -695,7 +692,7 @@ static int zynq_qspi_probe(struct platform_device *pdev)
ctlr->setup = zynq_qspi_setup_op;
ctlr->max_speed_hz = clk_get_rate(xqspi->refclk) / 2;
ctlr->dev.of_node = np;
ret = spi_register_controller(ctlr);
ret = devm_spi_register_controller(&pdev->dev, ctlr);
if (ret) {
dev_err(&pdev->dev, "spi_register_master failed\n");
goto clk_dis_all;

5
drivers/spi/spi-zynqmp-gqspi.c
View File

@ -1016,7 +1016,6 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
int ret = 0;
struct spi_master *master;
struct zynqmp_qspi *xqspi;
struct resource *res;
struct device *dev = &pdev->dev;
eemi_ops = zynqmp_pm_get_eemi_ops();
@ -1031,8 +1030,7 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
master->dev.of_node = pdev->dev.of_node;
platform_set_drvdata(pdev, master);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
xqspi->regs = devm_ioremap_resource(&pdev->dev, res);
xqspi->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(xqspi->regs)) {
ret = PTR_ERR(xqspi->regs);
goto remove_master;
@ -1077,7 +1075,6 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
xqspi->irq = platform_get_irq(pdev, 0);
if (xqspi->irq <= 0) {
ret = -ENXIO;
dev_err(dev, "irq resource not found\n");
goto clk_dis_all;
}
ret = devm_request_irq(&pdev->dev, xqspi->irq, zynqmp_qspi_irq,

53
drivers/spi/spi.c
View File

@ -1265,8 +1265,9 @@ EXPORT_SYMBOL_GPL(spi_finalize_current_transfer);
*/
static void __spi_pump_messages(struct spi_controller *ctlr, bool in_kthread)
{
unsigned long flags;
struct spi_message *msg;
bool was_busy = false;
unsigned long flags;
int ret;
/* Lock queue */
@ -1325,10 +1326,10 @@ static void __spi_pump_messages(struct spi_controller *ctlr, bool in_kthread)
}
/* Extract head of queue */
ctlr->cur_msg =
list_first_entry(&ctlr->queue, struct spi_message, queue);
msg = list_first_entry(&ctlr->queue, struct spi_message, queue);
ctlr->cur_msg = msg;
list_del_init(&ctlr->cur_msg->queue);
list_del_init(&msg->queue);
if (ctlr->busy)
was_busy = true;
else
@ -1361,7 +1362,7 @@ static void __spi_pump_messages(struct spi_controller *ctlr, bool in_kthread)
if (ctlr->auto_runtime_pm)
pm_runtime_put(ctlr->dev.parent);
ctlr->cur_msg->status = ret;
msg->status = ret;
spi_finalize_current_message(ctlr);
mutex_unlock(&ctlr->io_mutex);
@ -1369,28 +1370,28 @@ static void __spi_pump_messages(struct spi_controller *ctlr, bool in_kthread)
}
}
trace_spi_message_start(ctlr->cur_msg);
trace_spi_message_start(msg);
if (ctlr->prepare_message) {
ret = ctlr->prepare_message(ctlr, ctlr->cur_msg);
ret = ctlr->prepare_message(ctlr, msg);
if (ret) {
dev_err(&ctlr->dev, "failed to prepare message: %d\n",
ret);
ctlr->cur_msg->status = ret;
msg->status = ret;
spi_finalize_current_message(ctlr);
goto out;
}
ctlr->cur_msg_prepared = true;
}
ret = spi_map_msg(ctlr, ctlr->cur_msg);
ret = spi_map_msg(ctlr, msg);
if (ret) {
ctlr->cur_msg->status = ret;
msg->status = ret;
spi_finalize_current_message(ctlr);
goto out;
}
ret = ctlr->transfer_one_message(ctlr, ctlr->cur_msg);
ret = ctlr->transfer_one_message(ctlr, msg);
if (ret) {
dev_err(&ctlr->dev,
"failed to transfer one message from queue\n");
@ -1434,7 +1435,7 @@ static void spi_pump_messages(struct kthread_work *work)
*/
static void spi_set_thread_rt(struct spi_controller *ctlr)
{
struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };
struct sched_param param = { .sched_priority = MAX_RT_PRIO / 2 };
dev_info(&ctlr->dev,
"will run message pump with realtime priority\n");
@ -2105,8 +2106,8 @@ static int match_true(struct device *dev, void *data)
return 1;
}
static ssize_t spi_slave_show(struct device *dev,
struct device_attribute *attr, char *buf)
static ssize_t slave_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct spi_controller *ctlr = container_of(dev, struct spi_controller,
dev);
@ -2117,9 +2118,8 @@ static ssize_t spi_slave_show(struct device *dev,
child ? to_spi_device(child)->modalias : NULL);
}
static ssize_t spi_slave_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
static ssize_t slave_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct spi_controller *ctlr = container_of(dev, struct spi_controller,
dev);
@ -2157,7 +2157,7 @@ static ssize_t spi_slave_store(struct device *dev,
return count;
}
static DEVICE_ATTR(slave, 0644, spi_slave_show, spi_slave_store);
static DEVICE_ATTR_RW(slave);
static struct attribute *spi_slave_attrs[] = {
&dev_attr_slave.attr,
@ -2188,8 +2188,10 @@ extern struct class spi_slave_class; /* dummy */
* __spi_alloc_controller - allocate an SPI master or slave controller
* @dev: the controller, possibly using the platform_bus
* @size: how much zeroed driver-private data to allocate; the pointer to this
* memory is in the driver_data field of the returned device,
* accessible with spi_controller_get_devdata().
* memory is in the driver_data field of the returned device, accessible
* with spi_controller_get_devdata(); the memory is cacheline aligned;
* drivers granting DMA access to portions of their private data need to
* round up @size using ALIGN(size, dma_get_cache_alignment()).
* @slave: flag indicating whether to allocate an SPI master (false) or SPI
* slave (true) controller
* Context: can sleep
@ -2211,11 +2213,12 @@ struct spi_controller *__spi_alloc_controller(struct device *dev,
unsigned int size, bool slave)
{
struct spi_controller *ctlr;
size_t ctlr_size = ALIGN(sizeof(*ctlr), dma_get_cache_alignment());
if (!dev)
return NULL;
ctlr = kzalloc(size + sizeof(*ctlr), GFP_KERNEL);
ctlr = kzalloc(size + ctlr_size, GFP_KERNEL);
if (!ctlr)
return NULL;
@ -2229,14 +2232,14 @@ struct spi_controller *__spi_alloc_controller(struct device *dev,
ctlr->dev.class = &spi_master_class;
ctlr->dev.parent = dev;
pm_suspend_ignore_children(&ctlr->dev, true);
spi_controller_set_devdata(ctlr, &ctlr[1]);
spi_controller_set_devdata(ctlr, (void *)ctlr + ctlr_size);
return ctlr;
}
EXPORT_SYMBOL_GPL(__spi_alloc_controller);
#ifdef CONFIG_OF
static int of_spi_register_master(struct spi_controller *ctlr)
static int of_spi_get_gpio_numbers(struct spi_controller *ctlr)
{
int nb, i, *cs;
struct device_node *np = ctlr->dev.of_node;
@ -2269,7 +2272,7 @@ static int of_spi_register_master(struct spi_controller *ctlr)
return 0;
}
#else
static int of_spi_register_master(struct spi_controller *ctlr)
static int of_spi_get_gpio_numbers(struct spi_controller *ctlr)
{
return 0;
}
@ -2456,7 +2459,7 @@ int spi_register_controller(struct spi_controller *ctlr)
ctlr->mode_bits |= SPI_CS_HIGH;
} else {
/* Legacy code path for GPIOs from DT */
status = of_spi_register_master(ctlr);
status = of_spi_get_gpio_numbers(ctlr);
if (status)
return status;
}