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TTY/Serial updates for 4.14-rc1 

Here is the big tty/serial driver update for 4.14-rc1.
 
 Well, not all that big, just a number of small serial driver fixes, and
 a new serial driver.  Also in here are some much needed goldfish tty
 driver (emulator) fixes to try to get that codebase under control.
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial updates from Greg KH:
 "Here is the big tty/serial driver update for 4.14-rc1.

  Well, not all that big, just a number of small serial driver fixes,
  and a new serial driver. Also in here are some much needed goldfish
  tty driver (emulator) fixes to try to get that codebase under control.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (94 commits)
  tty: goldfish: Implement support for kernel 'earlycon' parameter
  tty: goldfish: Use streaming DMA for r/w operations on Ranchu platforms
  tty: goldfish: Refactor constants to better reflect their nature
  serial: 8250_port: Remove useless NULL checks
  earlycon: initialise baud field of earlycon device structure
  tty: hvcs: make ktermios const
  pty: show associative slave of ptmx in fdinfo
  tty: n_gsm: Add compat_ioctl
  tty: hvcs: constify vio_device_id
  tty: hvc_vio: constify vio_device_id
  tty: mips_ejtag_fdc: constify mips_cdmm_device_id
  Introduce 8250_men_mcb
  mcb: introduce mcb_get_resource()
  serial: imx: Avoid post-PIO cleanup if TX DMA is started
  tty: serial: imx: disable irq after suspend
  serial: 8250_uniphier: add suspend/resume support
  serial: 8250_uniphier: use CHAR register for canary to detect power-off
  serial: 8250_uniphier: fix serial port index in private data
  serial: 8250: of: Add new port type for MediaTek BTIF controller on MT7622/23 SoC
  dt-bindings: serial: 8250: Add MediaTek BTIF controller bindings
  ...
This commit is contained in:
Linus Torvalds 2017-09-05 10:30:48 -07:00
parent 1a3b85ea36 3840ed9548
commit e63a94f12b
74 changed files with 1628 additions and 306 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/devicetree/bindings/serial/8250.txt
View File

@ -14,6 +14,8 @@ Required properties:
tegra132, or tegra210.
- "nxp,lpc3220-uart"
- "ralink,rt2880-uart"
- For MediaTek BTIF, must contain '"mediatek,<chip>-btif",
"mediatek,mtk-btif"' where <chip> is mt7622, mt7623.
- "altr,16550-FIFO32"
- "altr,16550-FIFO64"
- "altr,16550-FIFO128"

2
Documentation/devicetree/bindings/serial/renesas,sci-serial.txt
View File

@ -41,6 +41,8 @@ Required properties:
- "renesas,hscif-r8a7795" for R8A7795 (R-Car H3) HSCIF compatible UART.
- "renesas,scif-r8a7796" for R8A7796 (R-Car M3-W) SCIF compatible UART.
- "renesas,hscif-r8a7796" for R8A7796 (R-Car M3-W) HSCIF compatible UART.
- "renesas,scif-r8a77995" for R8A77995 (R-Car D3) SCIF compatible UART.
- "renesas,hscif-r8a77995" for R8A77995 (R-Car D3) HSCIF compatible UART.
- "renesas,scifa-sh73a0" for SH73A0 (SH-Mobile AG5) SCIFA compatible UART.
- "renesas,scifb-sh73a0" for SH73A0 (SH-Mobile AG5) SCIFB compatible UART.
- "renesas,rcar-gen1-scif" for R-Car Gen1 SCIF compatible UART,

5
Documentation/devicetree/bindings/serial/rs485.txt
View File

@ -5,14 +5,13 @@ the built-in half-duplex mode.
The properties described hereafter shall be given to a half-duplex capable
UART node.
Required properties:
Optional properties:
- rs485-rts-delay: prop-encoded-array <a b> where:
* a is the delay between rts signal and beginning of data sent in milliseconds.
it corresponds to the delay before sending data.
* b is the delay between end of data sent and rts signal in milliseconds
it corresponds to the delay after sending data and actual release of the line.
Optional properties:
If this property is not specified, <0 0> is assumed.
- linux,rs485-enabled-at-boot-time: empty property telling to enable the rs485
feature at boot time. It can be disabled later with proper ioctl.
- rs485-rx-during-tx: empty property that enables the receiving of data even

17
Documentation/devicetree/bindings/serial/st,stm32-usart.txt
View File

@ -1,12 +1,19 @@
* STMicroelectronics STM32 USART
Required properties:
- compatible: Can be either "st,stm32-usart", "st,stm32-uart",
"st,stm32f7-usart" or "st,stm32f7-uart" depending on whether
the device supports synchronous mode and is compatible with
stm32(f4) or stm32f7.
- compatible: can be either:
- "st,stm32-usart",
- "st,stm32-uart",
- "st,stm32f7-usart",
- "st,stm32f7-uart",
- "st,stm32h7-usart"
- "st,stm32h7-uart".
depending on whether the device supports synchronous mode
and is compatible with stm32(f4), stm32f7 or stm32h7.
- reg: The address and length of the peripheral registers space
- interrupts: The interrupt line of the USART instance
- interrupts:
- The interrupt line for the USART instance,
- An optional wake-up interrupt.
- clocks: The input clock of the USART instance
Optional properties:

20
drivers/mcb/mcb-core.c
View File

@ -417,6 +417,22 @@ void mcb_bus_add_devices(const struct mcb_bus *bus)
}
EXPORT_SYMBOL_GPL(mcb_bus_add_devices);
/**
* mcb_get_resource() - get a resource for a mcb device
* @dev: the mcb device
* @type: the type of resource
*/
struct resource *mcb_get_resource(struct mcb_device *dev, unsigned int type)
{
if (type == IORESOURCE_MEM)
return &dev->mem;
else if (type == IORESOURCE_IRQ)
return &dev->irq;
else
return NULL;
}
EXPORT_SYMBOL_GPL(mcb_get_resource);
/**
* mcb_request_mem() - Request memory
* @dev: The @mcb_device the memory is for
@ -460,7 +476,9 @@ EXPORT_SYMBOL_GPL(mcb_release_mem);
static int __mcb_get_irq(struct mcb_device *dev)
{
struct resource *irq = &dev->irq;
struct resource *irq;
irq = mcb_get_resource(dev, IORESOURCE_IRQ);
return irq->start;
}

3
drivers/tty/Kconfig
View File

@ -392,6 +392,9 @@ config PPC_EARLY_DEBUG_EHV_BC_HANDLE
config GOLDFISH_TTY
tristate "Goldfish TTY Driver"
depends on GOLDFISH
select SERIAL_CORE
select SERIAL_CORE_CONSOLE
select SERIAL_EARLYCON
help
Console and system TTY driver for the Goldfish virtual platform.

2
drivers/tty/ehv_bytechan.c
View File

@ -122,7 +122,7 @@ static int find_console_handle(void)
stdout_irq = irq_of_parse_and_map(np, 0);
if (stdout_irq == NO_IRQ) {
pr_err("ehv-bc: no 'interrupts' property in %s node\n", np->full_name);
pr_err("ehv-bc: no 'interrupts' property in %pOF node\n", np);
return 0;
}

230
drivers/tty/goldfish.c
View File

@ -1,6 +1,7 @@
/*
* Copyright (C) 2007 Google, Inc.
* Copyright (C) 2012 Intel, Inc.
* Copyright (C) 2017 Imagination Technologies Ltd.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
@ -22,21 +23,23 @@
#include <linux/io.h>
#include <linux/module.h>
#include <linux/goldfish.h>
#include <linux/mm.h>
#include <linux/dma-mapping.h>
#include <linux/serial_core.h>
enum {
GOLDFISH_TTY_PUT_CHAR = 0x00,
GOLDFISH_TTY_BYTES_READY = 0x04,
GOLDFISH_TTY_CMD = 0x08,
/* Goldfish tty register's offsets */
#define GOLDFISH_TTY_REG_BYTES_READY 0x04
#define GOLDFISH_TTY_REG_CMD 0x08
#define GOLDFISH_TTY_REG_DATA_PTR 0x10
#define GOLDFISH_TTY_REG_DATA_LEN 0x14
#define GOLDFISH_TTY_REG_DATA_PTR_HIGH 0x18
#define GOLDFISH_TTY_REG_VERSION 0x20
GOLDFISH_TTY_DATA_PTR = 0x10,
GOLDFISH_TTY_DATA_LEN = 0x14,
GOLDFISH_TTY_DATA_PTR_HIGH = 0x18,
GOLDFISH_TTY_CMD_INT_DISABLE = 0,
GOLDFISH_TTY_CMD_INT_ENABLE = 1,
GOLDFISH_TTY_CMD_WRITE_BUFFER = 2,
GOLDFISH_TTY_CMD_READ_BUFFER = 3,
};
/* Goldfish tty commands */
#define GOLDFISH_TTY_CMD_INT_DISABLE 0
#define GOLDFISH_TTY_CMD_INT_ENABLE 1
#define GOLDFISH_TTY_CMD_WRITE_BUFFER 2
#define GOLDFISH_TTY_CMD_READ_BUFFER 3
struct goldfish_tty {
struct tty_port port;
@ -45,6 +48,8 @@ struct goldfish_tty {
u32 irq;
int opencount;
struct console console;
u32 version;
struct device *dev;
};
static DEFINE_MUTEX(goldfish_tty_lock);
@ -53,38 +58,107 @@ static u32 goldfish_tty_line_count = 8;
static u32 goldfish_tty_current_line_count;
static struct goldfish_tty *goldfish_ttys;
static void goldfish_tty_do_write(int line, const char *buf, unsigned count)
static void do_rw_io(struct goldfish_tty *qtty,
unsigned long address,
unsigned int count,
int is_write)
{
unsigned long irq_flags;
struct goldfish_tty *qtty = &goldfish_ttys[line];
void __iomem *base = qtty->base;
spin_lock_irqsave(&qtty->lock, irq_flags);
gf_write_ptr(buf, base + GOLDFISH_TTY_DATA_PTR,
base + GOLDFISH_TTY_DATA_PTR_HIGH);
writel(count, base + GOLDFISH_TTY_DATA_LEN);
writel(GOLDFISH_TTY_CMD_WRITE_BUFFER, base + GOLDFISH_TTY_CMD);
gf_write_ptr((void *)address, base + GOLDFISH_TTY_REG_DATA_PTR,
base + GOLDFISH_TTY_REG_DATA_PTR_HIGH);
writel(count, base + GOLDFISH_TTY_REG_DATA_LEN);
if (is_write)
writel(GOLDFISH_TTY_CMD_WRITE_BUFFER,
base + GOLDFISH_TTY_REG_CMD);
else
writel(GOLDFISH_TTY_CMD_READ_BUFFER,
base + GOLDFISH_TTY_REG_CMD);
spin_unlock_irqrestore(&qtty->lock, irq_flags);
}
static void goldfish_tty_rw(struct goldfish_tty *qtty,
unsigned long addr,
unsigned int count,
int is_write)
{
dma_addr_t dma_handle;
enum dma_data_direction dma_dir;
dma_dir = (is_write ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
if (qtty->version > 0) {
/*
* Goldfish TTY for Ranchu platform uses
* physical addresses and DMA for read/write operations
*/
unsigned long addr_end = addr + count;
while (addr < addr_end) {
unsigned long pg_end = (addr & PAGE_MASK) + PAGE_SIZE;
unsigned long next =
pg_end < addr_end ? pg_end : addr_end;
unsigned long avail = next - addr;
/*
* Map the buffer's virtual address to the DMA address
* so the buffer can be accessed by the device.
*/
dma_handle = dma_map_single(qtty->dev, (void *)addr,
avail, dma_dir);
if (dma_mapping_error(qtty->dev, dma_handle)) {
dev_err(qtty->dev, "tty: DMA mapping error.\n");
return;
}
do_rw_io(qtty, dma_handle, avail, is_write);
/*
* Unmap the previously mapped region after
* the completion of the read/write operation.
*/
dma_unmap_single(qtty->dev, dma_handle, avail, dma_dir);
addr += avail;
}
} else {
/*
* Old style Goldfish TTY used on the Goldfish platform
* uses virtual addresses.
*/
do_rw_io(qtty, addr, count, is_write);
}
}
static void goldfish_tty_do_write(int line, const char *buf,
unsigned int count)
{
struct goldfish_tty *qtty = &goldfish_ttys[line];
unsigned long address = (unsigned long)(void *)buf;
goldfish_tty_rw(qtty, address, count, 1);
}
static irqreturn_t goldfish_tty_interrupt(int irq, void *dev_id)
{
struct goldfish_tty *qtty = dev_id;
void __iomem *base = qtty->base;
unsigned long irq_flags;
unsigned long address;
unsigned char *buf;
u32 count;
count = readl(base + GOLDFISH_TTY_BYTES_READY);
count = readl(base + GOLDFISH_TTY_REG_BYTES_READY);
if (count == 0)
return IRQ_NONE;
count = tty_prepare_flip_string(&qtty->port, &buf, count);
spin_lock_irqsave(&qtty->lock, irq_flags);
gf_write_ptr(buf, base + GOLDFISH_TTY_DATA_PTR,
base + GOLDFISH_TTY_DATA_PTR_HIGH);
writel(count, base + GOLDFISH_TTY_DATA_LEN);
writel(GOLDFISH_TTY_CMD_READ_BUFFER, base + GOLDFISH_TTY_CMD);
spin_unlock_irqrestore(&qtty->lock, irq_flags);
address = (unsigned long)(void *)buf;
goldfish_tty_rw(qtty, address, count, 0);
tty_schedule_flip(&qtty->port);
return IRQ_HANDLED;
}
@ -93,7 +167,7 @@ static int goldfish_tty_activate(struct tty_port *port, struct tty_struct *tty)
{
struct goldfish_tty *qtty = container_of(port, struct goldfish_tty,
port);
writel(GOLDFISH_TTY_CMD_INT_ENABLE, qtty->base + GOLDFISH_TTY_CMD);
writel(GOLDFISH_TTY_CMD_INT_ENABLE, qtty->base + GOLDFISH_TTY_REG_CMD);
return 0;
}
@ -101,7 +175,7 @@ static void goldfish_tty_shutdown(struct tty_port *port)
{
struct goldfish_tty *qtty = container_of(port, struct goldfish_tty,
port);
writel(GOLDFISH_TTY_CMD_INT_DISABLE, qtty->base + GOLDFISH_TTY_CMD);
writel(GOLDFISH_TTY_CMD_INT_DISABLE, qtty->base + GOLDFISH_TTY_REG_CMD);
}
static int goldfish_tty_open(struct tty_struct *tty, struct file *filp)
@ -136,7 +210,7 @@ static int goldfish_tty_chars_in_buffer(struct tty_struct *tty)
{
struct goldfish_tty *qtty = &goldfish_ttys[tty->index];
void __iomem *base = qtty->base;
return readl(base + GOLDFISH_TTY_BYTES_READY);
return readl(base + GOLDFISH_TTY_REG_BYTES_READY);
}
static void goldfish_tty_console_write(struct console *co, const char *b,
@ -227,7 +301,7 @@ static void goldfish_tty_delete_driver(void)
static int goldfish_tty_probe(struct platform_device *pdev)
{
struct goldfish_tty *qtty;
int ret = -EINVAL;
int ret = -ENODEV;
struct resource *r;
struct device *ttydev;
void __iomem *base;
@ -235,16 +309,22 @@ static int goldfish_tty_probe(struct platform_device *pdev)
unsigned int line;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (r == NULL)
return -EINVAL;
if (!r) {
pr_err("goldfish_tty: No MEM resource available!\n");
return -ENOMEM;
}
base = ioremap(r->start, 0x1000);
if (base == NULL)
pr_err("goldfish_tty: unable to remap base\n");
if (!base) {
pr_err("goldfish_tty: Unable to ioremap base!\n");
return -ENOMEM;
}
r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (r == NULL)
if (!r) {
pr_err("goldfish_tty: No IRQ resource available!\n");
goto err_unmap;
}
irq = r->start;
@ -255,13 +335,17 @@ static int goldfish_tty_probe(struct platform_device *pdev)
else
line = pdev->id;
if (line >= goldfish_tty_line_count)
goto err_create_driver_failed;
if (line >= goldfish_tty_line_count) {
pr_err("goldfish_tty: Reached maximum tty number of %d.\n",
goldfish_tty_current_line_count);
ret = -ENOMEM;
goto err_unlock;
}
if (goldfish_tty_current_line_count == 0) {
ret = goldfish_tty_create_driver();
if (ret)
goto err_create_driver_failed;
goto err_unlock;
}
goldfish_tty_current_line_count++;
@ -271,17 +355,45 @@ static int goldfish_tty_probe(struct platform_device *pdev)
qtty->port.ops = &goldfish_port_ops;
qtty->base = base;
qtty->irq = irq;
qtty->dev = &pdev->dev;
writel(GOLDFISH_TTY_CMD_INT_DISABLE, base + GOLDFISH_TTY_CMD);
/*
* Goldfish TTY device used by the Goldfish emulator
* should identify itself with 0, forcing the driver
* to use virtual addresses. Goldfish TTY device
* on Ranchu emulator (qemu2) returns 1 here and
* driver will use physical addresses.
*/
qtty->version = readl(base + GOLDFISH_TTY_REG_VERSION);
/*
* Goldfish TTY device on Ranchu emulator (qemu2)
* will use DMA for read/write IO operations.
*/
if (qtty->version > 0) {
/*
* Initialize dma_mask to 32-bits.
*/
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
if (ret) {
dev_err(&pdev->dev, "No suitable DMA available.\n");
goto err_dec_line_count;
}
}
writel(GOLDFISH_TTY_CMD_INT_DISABLE, base + GOLDFISH_TTY_REG_CMD);
ret = request_irq(irq, goldfish_tty_interrupt, IRQF_SHARED,
"goldfish_tty", qtty);
if (ret)
goto err_request_irq_failed;
"goldfish_tty", qtty);
if (ret) {
pr_err("goldfish_tty: No IRQ available!\n");
goto err_dec_line_count;
}
ttydev = tty_port_register_device(&qtty->port, goldfish_tty_driver,
line, &pdev->dev);
line, &pdev->dev);
if (IS_ERR(ttydev)) {
ret = PTR_ERR(ttydev);
goto err_tty_register_device_failed;
@ -301,11 +413,11 @@ static int goldfish_tty_probe(struct platform_device *pdev)
err_tty_register_device_failed:
free_irq(irq, qtty);
err_request_irq_failed:
err_dec_line_count:
goldfish_tty_current_line_count--;
if (goldfish_tty_current_line_count == 0)
goldfish_tty_delete_driver();
err_create_driver_failed:
err_unlock:
mutex_unlock(&goldfish_tty_lock);
err_unmap:
iounmap(base);
@ -330,6 +442,30 @@ static int goldfish_tty_remove(struct platform_device *pdev)
return 0;
}
static void gf_early_console_putchar(struct uart_port *port, int ch)
{
__raw_writel(ch, port->membase);
}
static void gf_early_write(struct console *con, const char *s, unsigned int n)
{
struct earlycon_device *dev = con->data;
uart_console_write(&dev->port, s, n, gf_early_console_putchar);
}
static int __init gf_earlycon_setup(struct earlycon_device *device,
const char *opt)
{
if (!device->port.membase)
return -ENODEV;
device->con->write = gf_early_write;
return 0;
}
OF_EARLYCON_DECLARE(early_gf_tty, "google,goldfish-tty", gf_earlycon_setup);
static const struct of_device_id goldfish_tty_of_match[] = {
{ .compatible = "google,goldfish-tty", },
{},

16
drivers/tty/hvc/hvc_opal.c
View File

@ -179,8 +179,8 @@ static int hvc_opal_probe(struct platform_device *dev)
proto = HV_PROTOCOL_HVSI;
ops = &hvc_opal_hvsi_ops;
} else {
pr_err("hvc_opal: Unknown protocol for %s\n",
dev->dev.of_node->full_name);
pr_err("hvc_opal: Unknown protocol for %pOF\n",
dev->dev.of_node);
return -ENXIO;
}
@ -204,14 +204,14 @@ static int hvc_opal_probe(struct platform_device *dev)
/* Instanciate now to establish a mapping index==vtermno */
hvc_instantiate(termno, termno, ops);
} else {
pr_err("hvc_opal: Device %s has duplicate terminal number #%d\n",
dev->dev.of_node->full_name, termno);
pr_err("hvc_opal: Device %pOF has duplicate terminal number #%d\n",
dev->dev.of_node, termno);
return -ENXIO;
}
pr_info("hvc%d: %s protocol on %s%s\n", termno,
pr_info("hvc%d: %s protocol on %pOF%s\n", termno,
proto == HV_PROTOCOL_RAW ? "raw" : "hvsi",
dev->dev.of_node->full_name,
dev->dev.of_node,
boot ? " (boot console)" : "");
irq = irq_of_parse_and_map(dev->dev.of_node, 0);
@ -222,8 +222,8 @@ static int hvc_opal_probe(struct platform_device *dev)
}
if (!irq) {
pr_err("hvc_opal: Unable to map interrupt for device %s\n",
dev->dev.of_node->full_name);
pr_err("hvc_opal: Unable to map interrupt for device %pOF\n",
dev->dev.of_node);
return irq;
}

8
drivers/tty/hvc/hvc_vio.c
View File

@ -53,7 +53,7 @@
static const char hvc_driver_name[] = "hvc_console";
static struct vio_device_id hvc_driver_table[] = {
static const struct vio_device_id hvc_driver_table[] = {
{"serial", "hvterm1"},
#ifndef HVC_OLD_HVSI
{"serial", "hvterm-protocol"},
@ -312,12 +312,12 @@ static int hvc_vio_probe(struct vio_dev *vdev,
proto = HV_PROTOCOL_HVSI;
ops = &hvterm_hvsi_ops;
} else {
pr_err("hvc_vio: Unknown protocol for %s\n", vdev->dev.of_node->full_name);
pr_err("hvc_vio: Unknown protocol for %pOF\n", vdev->dev.of_node);
return -ENXIO;
}
pr_devel("hvc_vio_probe() device %s, using %s protocol\n",
vdev->dev.of_node->full_name,
pr_devel("hvc_vio_probe() device %pOF, using %s protocol\n",
vdev->dev.of_node,
proto == HV_PROTOCOL_RAW ? "raw" : "hvsi");
/* Is it our boot one ? */

4
drivers/tty/hvc/hvcs.c
View File

@ -189,7 +189,7 @@ MODULE_VERSION(HVCS_DRIVER_VERSION);
* that will cause echoing or we'll go into recursive loop echoing chars back
* and forth with the console drivers.
*/
static struct ktermios hvcs_tty_termios = {
static const struct ktermios hvcs_tty_termios = {
.c_iflag = IGNBRK | IGNPAR,
.c_oflag = OPOST,
.c_cflag = B38400 | CS8 | CREAD | HUPCL,
@ -675,7 +675,7 @@ static int khvcsd(void *unused)
return 0;
}
static struct vio_device_id hvcs_driver_table[] = {
static const struct vio_device_id hvcs_driver_table[] = {
{"serial-server", "hvterm2"},
{ "", "" }
};

2
drivers/tty/isicom.c
View File

@ -150,7 +150,7 @@
static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
static void isicom_remove(struct pci_dev *);
static struct pci_device_id isicom_pci_tbl[] = {
static const struct pci_device_id isicom_pci_tbl[] = {
{ PCI_DEVICE(VENDOR_ID, 0x2028) },
{ PCI_DEVICE(VENDOR_ID, 0x2051) },
{ PCI_DEVICE(VENDOR_ID, 0x2052) },

2
drivers/tty/mips_ejtag_fdc.c
View File

@ -1110,7 +1110,7 @@ out:
return ret;
}
static struct mips_cdmm_device_id mips_ejtag_fdc_tty_ids[] = {
static const struct mips_cdmm_device_id mips_ejtag_fdc_tty_ids[] = {
{ .type = 0xfd },
{ }
};

2
drivers/tty/moxa.c
View File

@ -88,7 +88,7 @@ static char *moxa_brdname[] =
};
#ifdef CONFIG_PCI
static struct pci_device_id moxa_pcibrds[] = {
static const struct pci_device_id moxa_pcibrds[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
.driver_data = MOXA_BOARD_C218_PCI },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),

2
drivers/tty/mxser.c
View File

@ -145,7 +145,7 @@ static const struct mxser_cardinfo mxser_cards[] = {
/* driver_data correspond to the lines in the structure above
see also ISA probe function before you change something */
static struct pci_device_id mxser_pcibrds[] = {
static const struct pci_device_id mxser_pcibrds[] = {
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },

11
drivers/tty/n_gsm.c
View File

@ -2607,6 +2607,14 @@ static int gsmld_ioctl(struct tty_struct *tty, struct file *file,
}
}
#ifdef CONFIG_COMPAT
static long gsmld_compat_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
return gsmld_ioctl(tty, file, cmd, arg);
}
#endif
/*
* Network interface
*
@ -2818,6 +2826,9 @@ static struct tty_ldisc_ops tty_ldisc_packet = {
.flush_buffer = gsmld_flush_buffer,
.read = gsmld_read,
.write = gsmld_write,
#ifdef CONFIG_COMPAT
.compat_ioctl = gsmld_compat_ioctl,
#endif
.ioctl = gsmld_ioctl,
.poll = gsmld_poll,
.receive_buf = gsmld_receive_buf,

8
drivers/tty/pty.c
View File

@ -742,6 +742,11 @@ static void pty_unix98_remove(struct tty_driver *driver, struct tty_struct *tty)
}
}
static void pty_show_fdinfo(struct tty_struct *tty, struct seq_file *m)
{
seq_printf(m, "tty-index:\t%d\n", tty->index);
}
static const struct tty_operations ptm_unix98_ops = {
.lookup = ptm_unix98_lookup,
.install = pty_unix98_install,
@ -756,7 +761,8 @@ static const struct tty_operations ptm_unix98_ops = {
.ioctl = pty_unix98_ioctl,
.compat_ioctl = pty_unix98_compat_ioctl,
.resize = pty_resize,
.cleanup = pty_cleanup
.cleanup = pty_cleanup,
.show_fdinfo = pty_show_fdinfo,
};
static const struct tty_operations pty_unix98_ops = {

2
drivers/tty/serdev/core.c
View File

@ -363,7 +363,7 @@ static int of_serdev_register_devices(struct serdev_controller *ctrl)
if (!of_get_property(node, "compatible", NULL))
continue;
dev_dbg(&ctrl->dev, "adding child %s\n", node->full_name);
dev_dbg(&ctrl->dev, "adding child %pOF\n", node);
serdev = serdev_device_alloc(ctrl);
if (!serdev)

2
drivers/tty/serial/21285.c
View File

@ -334,7 +334,7 @@ static int serial21285_verify_port(struct uart_port *port, struct serial_struct
return ret;
}
static struct uart_ops serial21285_ops = {
static const struct uart_ops serial21285_ops = {
.tx_empty = serial21285_tx_empty,
.get_mctrl = serial21285_get_mctrl,
.set_mctrl = serial21285_set_mctrl,

7
drivers/tty/serial/8250/8250_aspeed_vuart.c
View File

@ -223,12 +223,13 @@ static int aspeed_vuart_probe(struct platform_device *pdev)
if (IS_ERR(vuart->clk)) {
dev_warn(&pdev->dev,
"clk or clock-frequency not defined\n");
return PTR_ERR(vuart->clk);
rc = PTR_ERR(vuart->clk);
goto err_sysfs_remove;
}
rc = clk_prepare_enable(vuart->clk);
if (rc < 0)
return rc;
goto err_sysfs_remove;
clk = clk_get_rate(vuart->clk);
}
@ -286,6 +287,8 @@ static int aspeed_vuart_probe(struct platform_device *pdev)
err_clk_disable:
clk_disable_unprepare(vuart->clk);
irq_dispose_mapping(port.port.irq);
err_sysfs_remove:
sysfs_remove_group(&vuart->dev->kobj, &aspeed_vuart_attr_group);
return rc;
}

16
drivers/tty/serial/8250/8250_core.c
View File

@ -497,6 +497,11 @@ static void univ8250_rsa_support(struct uart_ops *ops)
#define univ8250_rsa_support(x) do { } while (0)
#endif /* CONFIG_SERIAL_8250_RSA */
static inline void serial8250_apply_quirks(struct uart_8250_port *up)
{
up->port.quirks |= skip_txen_test ? UPQ_NO_TXEN_TEST : 0;
}
static void __init serial8250_isa_init_ports(void)
{
struct uart_8250_port *up;
@ -577,9 +582,7 @@ serial8250_register_ports(struct uart_driver *drv, struct device *dev)
up->port.dev = dev;
if (skip_txen_test)
up->port.flags |= UPF_NO_TXEN_TEST;
serial8250_apply_quirks(up);
uart_add_one_port(drv, &up->port);
}
}
@ -1006,9 +1009,6 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
if (up->port.dev)
uart->port.dev = up->port.dev;
if (skip_txen_test)
uart->port.flags |= UPF_NO_TXEN_TEST;
if (up->port.flags & UPF_FIXED_TYPE)
uart->port.type = up->port.type;
@ -1048,6 +1048,7 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
serial8250_isa_config(0, &uart->port,
&uart->capabilities);
serial8250_apply_quirks(uart);
ret = uart_add_one_port(&serial8250_reg,
&uart->port);
if (ret == 0)
@ -1092,11 +1093,10 @@ void serial8250_unregister_port(int line)
uart_remove_one_port(&serial8250_reg, &uart->port);
if (serial8250_isa_devs) {
uart->port.flags &= ~UPF_BOOT_AUTOCONF;
if (skip_txen_test)
uart->port.flags |= UPF_NO_TXEN_TEST;
uart->port.type = PORT_UNKNOWN;
uart->port.dev = &serial8250_isa_devs->dev;
uart->capabilities = 0;
serial8250_apply_quirks(uart);
uart_add_one_port(&serial8250_reg, &uart->port);
} else {
uart->port.dev = NULL;

2
drivers/tty/serial/8250/8250_dw.c
View File

@ -529,7 +529,7 @@ static int dw8250_probe(struct platform_device *pdev)
}
}
data->rst = devm_reset_control_get_optional(dev, NULL);
data->rst = devm_reset_control_get_optional_exclusive(dev, NULL);
if (IS_ERR(data->rst)) {
err = PTR_ERR(data->rst);
goto err_pclk;

8
drivers/tty/serial/8250/8250_early.c
View File

@ -37,7 +37,7 @@
#include <asm/io.h>
#include <asm/serial.h>
static unsigned int __init serial8250_early_in(struct uart_port *port, int offset)
static unsigned int serial8250_early_in(struct uart_port *port, int offset)
{
int reg_offset = offset;
offset <<= port->regshift;
@ -60,7 +60,7 @@ static unsigned int __init serial8250_early_in(struct uart_port *port, int offse
}
}
static void __init serial8250_early_out(struct uart_port *port, int offset, int value)
static void serial8250_early_out(struct uart_port *port, int offset, int value)
{
int reg_offset = offset;
offset <<= port->regshift;
@ -89,7 +89,7 @@ static void __init serial8250_early_out(struct uart_port *port, int offset, int
#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
static void __init serial_putc(struct uart_port *port, int c)
static void serial_putc(struct uart_port *port, int c)
{
unsigned int status;
@ -103,7 +103,7 @@ static void __init serial_putc(struct uart_port *port, int c)
}
}
static void __init early_serial8250_write(struct console *console,
static void early_serial8250_write(struct console *console,
const char *s, unsigned int count)
{
struct earlycon_device *device = console->data;

2
drivers/tty/serial/8250/8250_exar.c
View File

@ -601,7 +601,7 @@ static const struct exar8250_board pbn_exar_XR17V8358 = {
(kernel_ulong_t)&bd \
}
static struct pci_device_id exar_pci_tbl[] = {
static const struct pci_device_id exar_pci_tbl[] = {
CONNECT_DEVICE(XR17C152, UART_2_232, pbn_connect),
CONNECT_DEVICE(XR17C154, UART_4_232, pbn_connect),
CONNECT_DEVICE(XR17C158, UART_8_232, pbn_connect),

8
drivers/tty/serial/8250/8250_ingenic.c
View File

@ -50,17 +50,17 @@ static const struct of_device_id of_match[];
static struct earlycon_device *early_device;
static uint8_t __init early_in(struct uart_port *port, int offset)
static uint8_t early_in(struct uart_port *port, int offset)
{
return readl(port->membase + (offset << 2));
}
static void __init early_out(struct uart_port *port, int offset, uint8_t value)
static void early_out(struct uart_port *port, int offset, uint8_t value)
{
writel(value, port->membase + (offset << 2));
}
static void __init ingenic_early_console_putc(struct uart_port *port, int c)
static void ingenic_early_console_putc(struct uart_port *port, int c)
{
uint8_t lsr;
@ -71,7 +71,7 @@ static void __init ingenic_early_console_putc(struct uart_port *port, int c)
early_out(port, UART_TX, c);
}
static void __init ingenic_early_console_write(struct console *console,
static void ingenic_early_console_write(struct console *console,
const char *s, unsigned int count)
{
uart_console_write(&early_device->port, s, count,

118
drivers/tty/serial/8250/8250_men_mcb.c Normal file
View File

@ -0,0 +1,118 @@
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mcb.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <uapi/linux/serial_core.h>
struct serial_8250_men_mcb_data {
struct uart_8250_port uart;
int line;
};
/*
* The Z125 16550-compatible UART has no fixed base clock assigned
* So, depending on the board we're on, we need to adjust the
* parameter in order to really set the correct baudrate, and
* do so if possible without user interaction
*/
static u32 men_z125_lookup_uartclk(struct mcb_device *mdev)
{
/* use default value if board is not available below */
u32 clkval = 1041666;
dev_info(&mdev->dev, "%s on board %s\n",
dev_name(&mdev->dev),
mdev->bus->name);
if (strncmp(mdev->bus->name, "F075", 4) == 0)
clkval = 1041666;
else if (strncmp(mdev->bus->name, "F216", 4) == 0)
clkval = 1843200;
else if (strncmp(mdev->bus->name, "G215", 4) == 0)
clkval = 1843200;
else
dev_info(&mdev->dev,
"board not detected, using default uartclk\n");
clkval = clkval << 4;
return clkval;
}
static int serial_8250_men_mcb_probe(struct mcb_device *mdev,
const struct mcb_device_id *id)
{
struct serial_8250_men_mcb_data *data;
struct resource *mem;
data = devm_kzalloc(&mdev->dev,
sizeof(struct serial_8250_men_mcb_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
mcb_set_drvdata(mdev, data);
data->uart.port.dev = mdev->dma_dev;
spin_lock_init(&data->uart.port.lock);
data->uart.port.type = PORT_16550;
data->uart.port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_FIXED_TYPE;
data->uart.port.iotype = UPIO_MEM;
data->uart.port.uartclk = men_z125_lookup_uartclk(mdev);
data->uart.port.regshift = 0;
data->uart.port.fifosize = 60;
mem = mcb_get_resource(mdev, IORESOURCE_MEM);
if (mem == NULL)
return -ENXIO;
data->uart.port.irq = mcb_get_irq(mdev);
data->uart.port.membase = devm_ioremap_resource(&mdev->dev, mem);
if (IS_ERR(data->uart.port.membase))
return PTR_ERR_OR_ZERO(data->uart.port.membase);
data->uart.port.mapbase = (unsigned long) mem->start;
data->uart.port.iobase = data->uart.port.mapbase;
/* ok, register the port */
data->line = serial8250_register_8250_port(&data->uart);
if (data->line < 0)
return data->line;
dev_info(&mdev->dev, "found 16Z125 UART: ttyS%d\n", data->line);
return 0;
}
static void serial_8250_men_mcb_remove(struct mcb_device *mdev)
{
struct serial_8250_men_mcb_data *data = mcb_get_drvdata(mdev);
if (data)
serial8250_unregister_port(data->line);
}
static const struct mcb_device_id serial_8250_men_mcb_ids[] = {
{ .device = 0x7d },
{ }
};
MODULE_DEVICE_TABLE(mcb, serial_8250_men_mcb_ids);
static struct mcb_driver mcb_driver = {
.driver = {
.name = "8250_men_mcb",
.owner = THIS_MODULE,
},
.probe = serial_8250_men_mcb_probe,
.remove = serial_8250_men_mcb_remove,
.id_table = serial_8250_men_mcb_ids,
};
module_mcb_driver(mcb_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("MEN 16z125 8250 UART driver");
MODULE_AUTHOR("Michael Moese <michael.moese@men.de");
MODULE_ALIAS("mcb:16z125");

5
drivers/tty/serial/8250/8250_mtk.c
View File

@ -171,10 +171,7 @@ static int mtk8250_probe_of(struct platform_device *pdev, struct uart_port *p,
}
data->bus_clk = devm_clk_get(&pdev->dev, "bus");
if (IS_ERR(data->bus_clk))
return PTR_ERR(data->bus_clk);
return 0;
return PTR_ERR_OR_ZERO(data->bus_clk);
}
static int mtk8250_probe(struct platform_device *pdev)

60
drivers/tty/serial/8250/8250_of.c
View File

@ -18,6 +18,7 @@
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/pm_runtime.h>
#include <linux/clk.h>
#include <linux/reset.h>
@ -65,6 +66,10 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
int ret;
memset(port, 0, sizeof *port);
pm_runtime_enable(&ofdev->dev);
pm_runtime_get_sync(&ofdev->dev);
if (of_property_read_u32(np, "clock-frequency", &clk)) {
/* Get clk rate through clk driver if present */
@ -72,12 +77,13 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
if (IS_ERR(info->clk)) {
dev_warn(&ofdev->dev,
"clk or clock-frequency not defined\n");
return PTR_ERR(info->clk);
ret = PTR_ERR(info->clk);
goto err_pmruntime;
}
ret = clk_prepare_enable(info->clk);
if (ret < 0)
return ret;
goto err_pmruntime;
clk = clk_get_rate(info->clk);
}
@ -88,7 +94,7 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
ret = of_address_to_resource(np, 0, &resource);
if (ret) {
dev_warn(&ofdev->dev, "invalid address\n");
goto out;
goto err_unprepare;
}
spin_lock_init(&port->lock);
@ -130,23 +136,23 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
dev_warn(&ofdev->dev, "unsupported reg-io-width (%d)\n",
prop);
ret = -EINVAL;
goto out;
goto err_dispose;
}
}
info->rst = devm_reset_control_get_optional_shared(&ofdev->dev, NULL);
if (IS_ERR(info->rst))
goto out;
goto err_dispose;
ret = reset_control_deassert(info->rst);
if (ret)
goto out;
goto err_dispose;
port->type = type;
port->uartclk = clk;
port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP
| UPF_FIXED_PORT | UPF_FIXED_TYPE;
if (of_find_property(np, "no-loopback-test", NULL))
if (of_property_read_bool(np, "no-loopback-test"))
port->flags |= UPF_SKIP_TEST;
port->dev = &ofdev->dev;
@ -167,9 +173,13 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
port->handle_irq = fsl8250_handle_irq;
return 0;
out:
if (info->clk)
clk_disable_unprepare(info->clk);
err_dispose:
irq_dispose_mapping(port->irq);
err_unprepare:
clk_disable_unprepare(info->clk);
err_pmruntime:
pm_runtime_put_sync(&ofdev->dev);
pm_runtime_disable(&ofdev->dev);
return ret;
}
@ -190,7 +200,7 @@ static int of_platform_serial_probe(struct platform_device *ofdev)
if (!match)
return -EINVAL;
if (of_find_property(ofdev->dev.of_node, "used-by-rtas", NULL))
if (of_property_read_bool(ofdev->dev.of_node, "used-by-rtas"))
return -EBUSY;
info = kzalloc(sizeof(*info), GFP_KERNEL);
@ -201,7 +211,7 @@ static int of_platform_serial_probe(struct platform_device *ofdev)
memset(&port8250, 0, sizeof(port8250));
ret = of_platform_serial_setup(ofdev, port_type, &port8250.port, info);
if (ret)
goto out;
goto err_free;
if (port8250.port.fifosize)
port8250.capabilities = UART_CAP_FIFO;
@ -217,15 +227,19 @@ static int of_platform_serial_probe(struct platform_device *ofdev)
ret = serial8250_register_8250_port(&port8250);
if (ret < 0)
goto out;
goto err_dispose;
info->type = port_type;
info->line = ret;
platform_set_drvdata(ofdev, info);
return 0;
out:
kfree(info);
err_dispose:
irq_dispose_mapping(port8250.port.irq);
pm_runtime_put_sync(&ofdev->dev);
pm_runtime_disable(&ofdev->dev);
clk_disable_unprepare(info->clk);
err_free:
kfree(info);
return ret;
}
@ -239,8 +253,9 @@ static int of_platform_serial_remove(struct platform_device *ofdev)
serial8250_unregister_port(info->line);
reset_control_assert(info->rst);
if (info->clk)
clk_disable_unprepare(info->clk);
pm_runtime_put_sync(&ofdev->dev);
pm_runtime_disable(&ofdev->dev);
clk_disable_unprepare(info->clk);
kfree(info);
return 0;
}
@ -254,9 +269,10 @@ static int of_serial_suspend(struct device *dev)
serial8250_suspend_port(info->line);
if (info->clk && (!uart_console(port) || console_suspend_enabled))
if (!uart_console(port) || console_suspend_enabled) {
pm_runtime_put_sync(dev);
clk_disable_unprepare(info->clk);
}
return 0;
}
@ -266,8 +282,10 @@ static int of_serial_resume(struct device *dev)
struct uart_8250_port *port8250 = serial8250_get_port(info->line);
struct uart_port *port = &port8250->port;
if (info->clk && (!uart_console(port) || console_suspend_enabled))
if (!uart_console(port) || console_suspend_enabled) {
pm_runtime_get_sync(dev);
clk_prepare_enable(info->clk);
}
serial8250_resume_port(info->line);
@ -295,6 +313,8 @@ static const struct of_device_id of_platform_serial_table[] = {
.data = (void *)PORT_ALTR_16550_F64, },
{ .compatible = "altr,16550-FIFO128",
.data = (void *)PORT_ALTR_16550_F128, },
{ .compatible = "mediatek,mtk-btif",
.data = (void *)PORT_MTK_BTIF, },
{ .compatible = "mrvl,mmp-uart",
.data = (void *)PORT_XSCALE, },
{ .compatible = "ti,da830-uart", .data = (void *)PORT_DA830, },

43
drivers/tty/serial/8250/8250_pci.c
View File

@ -1548,7 +1548,7 @@ static int skip_tx_en_setup(struct serial_private *priv,
const struct pciserial_board *board,
struct uart_8250_port *port, int idx)
{
port->port.flags |= UPF_NO_TXEN_TEST;
port->port.quirks |= UPQ_NO_TXEN_TEST;
dev_dbg(&priv->dev->dev,
"serial8250: skipping TxEn test for device [%04x:%04x] subsystem [%04x:%04x]\n",
priv->dev->vendor, priv->dev->device,
@ -3384,17 +3384,8 @@ static const struct pci_device_id blacklist[] = {
{ PCI_VDEVICE(COMMTECH, PCI_ANY_ID), },
};
/*
* Given a complete unknown PCI device, try to use some heuristics to
* guess what the configuration might be, based on the pitiful PCI
* serial specs. Returns 0 on success, 1 on failure.
*/
static int
serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board)
static int serial_pci_is_class_communication(struct pci_dev *dev)
{
const struct pci_device_id *bldev;
int num_iomem, num_port, first_port = -1, i;
/*
* If it is not a communications device or the programming
* interface is greater than 6, give up.
@ -3407,6 +3398,13 @@ serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board)
(dev->class & 0xff) > 6)
return -ENODEV;
return 0;
}
static int serial_pci_is_blacklisted(struct pci_dev *dev)
{
const struct pci_device_id *bldev;
/*
* Do not access blacklisted devices that are known not to
* feature serial ports or are handled by other modules.
@ -3419,6 +3417,19 @@ serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board)
return -ENODEV;
}
return 0;
}
/*
* Given a complete unknown PCI device, try to use some heuristics to
* guess what the configuration might be, based on the pitiful PCI
* serial specs. Returns 0 on success, -ENODEV on failure.
*/
static int
serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board)
{
int num_iomem, num_port, first_port = -1, i;
num_iomem = num_port = 0;
for (i = 0; i < PCI_NUM_BAR_RESOURCES; i++) {
if (pci_resource_flags(dev, i) & IORESOURCE_IO) {
@ -3639,6 +3650,14 @@ pciserial_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
board = &pci_boards[ent->driver_data];
rc = serial_pci_is_class_communication(dev);
if (rc)
return rc;
rc = serial_pci_is_blacklisted(dev);
if (rc)
return rc;
rc = pcim_enable_device(dev);
pci_save_state(dev);
if (rc)
@ -3723,7 +3742,7 @@ static int pciserial_resume_one(struct device *dev)
static SIMPLE_DEV_PM_OPS(pciserial_pm_ops, pciserial_suspend_one,
pciserial_resume_one);
static struct pci_device_id serial_pci_tbl[] = {
static const struct pci_device_id serial_pci_tbl[] = {
/* Advantech use PCI_DEVICE_ID_ADVANTECH_PCI3620 (0x3620) as 'PCI_SUBVENDOR_ID' */
{ PCI_VENDOR_ID_ADVANTECH, PCI_DEVICE_ID_ADVANTECH_PCI3620,
PCI_DEVICE_ID_ADVANTECH_PCI3620, 0x0001, 0, 0,

81
drivers/tty/serial/8250/8250_port.c
View File

@ -37,7 +37,7 @@
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/pm_runtime.h>
#include <linux/timer.h>
#include <linux/ktime.h>
#include <asm/io.h>
#include <asm/irq.h>
@ -289,6 +289,14 @@ static const struct serial8250_config uart_config[] = {
.rxtrig_bytes = {1, 4, 8, 14},
.flags = UART_CAP_FIFO | UART_CAP_AFE,
},
[PORT_MTK_BTIF] = {
.name = "MediaTek BTIF",
.fifo_size = 16,
.tx_loadsz = 16,
.fcr = UART_FCR_ENABLE_FIFO |
UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
.flags = UART_CAP_FIFO,
},
};
/* Uart divisor latch read */
@ -553,8 +561,8 @@ static inline void serial8250_em485_rts_after_send(struct uart_8250_port *p)
serial8250_out_MCR(p, mcr);
}
static void serial8250_em485_handle_start_tx(unsigned long arg);
static void serial8250_em485_handle_stop_tx(unsigned long arg);
static enum hrtimer_restart serial8250_em485_handle_start_tx(struct hrtimer *t);
static enum hrtimer_restart serial8250_em485_handle_stop_tx(struct hrtimer *t);
void serial8250_clear_and_reinit_fifos(struct uart_8250_port *p)
{
@ -609,12 +617,14 @@ int serial8250_em485_init(struct uart_8250_port *p)
if (!p->em485)
return -ENOMEM;
setup_timer(&p->em485->stop_tx_timer,
serial8250_em485_handle_stop_tx, (unsigned long)p);
setup_timer(&p->em485->start_tx_timer,
serial8250_em485_handle_start_tx, (unsigned long)p);
hrtimer_init(&p->em485->stop_tx_timer, CLOCK_MONOTONIC,
HRTIMER_MODE_REL);
hrtimer_init(&p->em485->start_tx_timer, CLOCK_MONOTONIC,
HRTIMER_MODE_REL);
p->em485->stop_tx_timer.function = &serial8250_em485_handle_stop_tx;
p->em485->start_tx_timer.function = &serial8250_em485_handle_start_tx;
p->em485->port = p;
p->em485->active_timer = NULL;
serial8250_em485_rts_after_send(p);
return 0;
@ -639,8 +649,8 @@ void serial8250_em485_destroy(struct uart_8250_port *p)
if (!p->em485)
return;
del_timer(&p->em485->start_tx_timer);
del_timer(&p->em485->stop_tx_timer);
hrtimer_cancel(&p->em485->start_tx_timer);
hrtimer_cancel(&p->em485->stop_tx_timer);
kfree(p->em485);
p->em485 = NULL;
@ -1435,22 +1445,33 @@ static void __do_stop_tx_rs485(struct uart_8250_port *p)
serial_port_out(&p->port, UART_IER, p->ier);
}
}
static void serial8250_em485_handle_stop_tx(unsigned long arg)
static enum hrtimer_restart serial8250_em485_handle_stop_tx(struct hrtimer *t)
{
struct uart_8250_port *p = (struct uart_8250_port *)arg;
struct uart_8250_em485 *em485 = p->em485;
struct uart_8250_em485 *em485;
struct uart_8250_port *p;
unsigned long flags;
em485 = container_of(t, struct uart_8250_em485, stop_tx_timer);
p = em485->port;
serial8250_rpm_get(p);
spin_lock_irqsave(&p->port.lock, flags);
if (em485 &&
em485->active_timer == &em485->stop_tx_timer) {
if (em485->active_timer == &em485->stop_tx_timer) {
__do_stop_tx_rs485(p);
em485->active_timer = NULL;
}
spin_unlock_irqrestore(&p->port.lock, flags);
serial8250_rpm_put(p);
return HRTIMER_NORESTART;
}
static void start_hrtimer_ms(struct hrtimer *hrt, unsigned long msec)
{
long sec = msec / 1000;
long nsec = (msec % 1000) * 1000000;
ktime_t t = ktime_set(sec, nsec);
hrtimer_start(hrt, t, HRTIMER_MODE_REL);
}
static void __stop_tx_rs485(struct uart_8250_port *p)
@ -1463,8 +1484,8 @@ static void __stop_tx_rs485(struct uart_8250_port *p)
*/
if (p->port.rs485.delay_rts_after_send > 0) {
em485->active_timer = &em485->stop_tx_timer;
mod_timer(&em485->stop_tx_timer, jiffies +
p->port.rs485.delay_rts_after_send * HZ / 1000);
start_hrtimer_ms(&em485->stop_tx_timer,
p->port.rs485.delay_rts_after_send);
} else {
__do_stop_tx_rs485(p);
}
@ -1494,8 +1515,8 @@ static inline void __stop_tx(struct uart_8250_port *p)
if ((lsr & BOTH_EMPTY) != BOTH_EMPTY)
return;
del_timer(&em485->start_tx_timer);
em485->active_timer = NULL;
hrtimer_cancel(&em485->start_tx_timer);
__stop_tx_rs485(p);
}
@ -1558,8 +1579,9 @@ static inline void start_tx_rs485(struct uart_port *port)
if (!(up->port.rs485.flags & SER_RS485_RX_DURING_TX))
serial8250_stop_rx(&up->port);
del_timer(&em485->stop_tx_timer);
em485->active_timer = NULL;
if (hrtimer_is_queued(&em485->stop_tx_timer))
hrtimer_cancel(&em485->stop_tx_timer);
mcr = serial8250_in_MCR(up);
if (!!(up->port.rs485.flags & SER_RS485_RTS_ON_SEND) !=
@ -1572,8 +1594,8 @@ static inline void start_tx_rs485(struct uart_port *port)
if (up->port.rs485.delay_rts_before_send > 0) {
em485->active_timer = &em485->start_tx_timer;
mod_timer(&em485->start_tx_timer, jiffies +
up->port.rs485.delay_rts_before_send * HZ / 1000);
start_hrtimer_ms(&em485->start_tx_timer,
up->port.rs485.delay_rts_before_send);
return;
}
}
@ -1581,19 +1603,22 @@ static inline void start_tx_rs485(struct uart_port *port)
__start_tx(port);
}
static void serial8250_em485_handle_start_tx(unsigned long arg)
static enum hrtimer_restart serial8250_em485_handle_start_tx(struct hrtimer *t)
{
struct uart_8250_port *p = (struct uart_8250_port *)arg;
struct uart_8250_em485 *em485 = p->em485;
struct uart_8250_em485 *em485;
struct uart_8250_port *p;
unsigned long flags;
em485 = container_of(t, struct uart_8250_em485, start_tx_timer);
p = em485->port;
spin_lock_irqsave(&p->port.lock, flags);
if (em485 &&
em485->active_timer == &em485->start_tx_timer) {
if (em485->active_timer == &em485->start_tx_timer) {
__start_tx(&p->port);
em485->active_timer = NULL;
}
spin_unlock_irqrestore(&p->port.lock, flags);
return HRTIMER_NORESTART;
}
static void serial8250_start_tx(struct uart_port *port)
@ -2304,7 +2329,7 @@ int serial8250_do_startup(struct uart_port *port)
* test if we receive TX irq. This way, we'll never enable
* UART_BUG_TXEN.
*/
if (up->port.flags & UPF_NO_TXEN_TEST)
if (up->port.quirks & UPQ_NO_TXEN_TEST)
goto dont_test_tx_en;
/*

63
drivers/tty/serial/8250/8250_uniphier.c
View File

@ -29,12 +29,13 @@
* - MMIO32 (regshift = 2)
* - FCR is not at 2, but 3
* - LCR and MCR are not at 3 and 4, they share 4
* - No SCR (Instead, CHAR can be used as a scratch register)
* - Divisor latch at 9, no divisor latch access bit
*/
#define UNIPHIER_UART_REGSHIFT 2
/* bit[15:8] = CHAR (not used), bit[7:0] = FCR */
/* bit[15:8] = CHAR, bit[7:0] = FCR */
#define UNIPHIER_UART_CHAR_FCR (3 << (UNIPHIER_UART_REGSHIFT))
/* bit[15:8] = LCR, bit[7:0] = MCR */
#define UNIPHIER_UART_LCR_MCR (4 << (UNIPHIER_UART_REGSHIFT))
@ -72,13 +73,18 @@ OF_EARLYCON_DECLARE(uniphier, "socionext,uniphier-uart",
/*
* The register map is slightly different from that of 8250.
* IO callbacks must be overridden for correct access to FCR, LCR, and MCR.
* IO callbacks must be overridden for correct access to FCR, LCR, MCR and SCR.
*/
static unsigned int uniphier_serial_in(struct uart_port *p, int offset)
{
unsigned int valshift = 0;
switch (offset) {
case UART_SCR:
/* No SCR for this hardware. Use CHAR as a scratch register */
valshift = 8;
offset = UNIPHIER_UART_CHAR_FCR;
break;
case UART_LCR:
valshift = 8;
/* fall through */
@ -91,8 +97,8 @@ static unsigned int uniphier_serial_in(struct uart_port *p, int offset)
}
/*
* The return value must be masked with 0xff because LCR and MCR reside
* in the same register that must be accessed by 32-bit write/read.
* The return value must be masked with 0xff because some registers
* share the same offset that must be accessed by 32-bit write/read.
* 8 or 16 bit access to this hardware result in unexpected behavior.
*/
return (readl(p->membase + offset) >> valshift) & 0xff;
@ -101,9 +107,13 @@ static unsigned int uniphier_serial_in(struct uart_port *p, int offset)
static void uniphier_serial_out(struct uart_port *p, int offset, int value)
{
unsigned int valshift = 0;
bool normal = true;
bool normal = false;
switch (offset) {
case UART_SCR:
/* No SCR for this hardware. Use CHAR as a scratch register */
valshift = 8;
/* fall through */
case UART_FCR:
offset = UNIPHIER_UART_CHAR_FCR;
break;
@ -114,10 +124,10 @@ static void uniphier_serial_out(struct uart_port *p, int offset, int value)
/* fall through */
case UART_MCR:
offset = UNIPHIER_UART_LCR_MCR;
normal = false;
break;
default:
offset <<= UNIPHIER_UART_REGSHIFT;
normal = true;
break;
}
@ -169,7 +179,7 @@ static int uniphier_of_serial_setup(struct device *dev, struct uart_port *port,
dev_err(dev, "failed to get alias id\n");
return ret;
}
port->line = priv->line = ret;
port->line = ret;
/* Get clk rate through clk driver */
priv->clk = devm_clk_get(dev, NULL);
@ -249,8 +259,8 @@ static int uniphier_uart_probe(struct platform_device *pdev)
up.dl_read = uniphier_serial_dl_read;
up.dl_write = uniphier_serial_dl_write;
ret = serial8250_register_8250_port(&up);
if (ret < 0) {
priv->line = serial8250_register_8250_port(&up);
if (priv->line < 0) {
dev_err(dev, "failed to register 8250 port\n");
clk_disable_unprepare(priv->clk);
return ret;
@ -271,6 +281,40 @@ static int uniphier_uart_remove(struct platform_device *pdev)
return 0;
}
static int __maybe_unused uniphier_uart_suspend(struct device *dev)
{
struct uniphier8250_priv *priv = dev_get_drvdata(dev);
struct uart_8250_port *up = serial8250_get_port(priv->line);
serial8250_suspend_port(priv->line);
if (!uart_console(&up->port) || console_suspend_enabled)
clk_disable_unprepare(priv->clk);
return 0;
}
static int __maybe_unused uniphier_uart_resume(struct device *dev)
{
struct uniphier8250_priv *priv = dev_get_drvdata(dev);
struct uart_8250_port *up = serial8250_get_port(priv->line);
int ret;
if (!uart_console(&up->port) || console_suspend_enabled) {
ret = clk_prepare_enable(priv->clk);
if (ret)
return ret;
}
serial8250_resume_port(priv->line);
return 0;
}
static const struct dev_pm_ops uniphier_uart_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(uniphier_uart_suspend, uniphier_uart_resume)
};
static const struct of_device_id uniphier_uart_match[] = {
{ .compatible = "socionext,uniphier-uart" },
{ /* sentinel */ }
@ -283,6 +327,7 @@ static struct platform_driver uniphier_uart_platform_driver = {
.driver = {
.name = "uniphier-uart",
.of_match_table = uniphier_uart_match,
.pm = &uniphier_uart_pm_ops,
},
};
module_platform_driver(uniphier_uart_platform_driver);

11
drivers/tty/serial/8250/Kconfig
View File

@ -155,6 +155,17 @@ config SERIAL_8250_CS
If unsure, say N.
config SERIAL_8250_MEN_MCB
tristate "MEN Z125 UART device support"
depends on MCB && SERIAL_8250
help
This enables support for FPGA based UARTs found on many MEN
boards. This driver enables support for the Z125 UARTs.
To compile this driver as a module, chose M here: the
module will be called 8250_men_mcb.
config SERIAL_8250_NR_UARTS
int "Maximum number of 8250/16550 serial ports"
depends on SERIAL_8250

1
drivers/tty/serial/8250/Makefile
View File

@ -23,6 +23,7 @@ obj-$(CONFIG_SERIAL_8250_BOCA) += 8250_boca.o
obj-$(CONFIG_SERIAL_8250_EXAR_ST16C554) += 8250_exar_st16c554.o
obj-$(CONFIG_SERIAL_8250_HUB6) += 8250_hub6.o
obj-$(CONFIG_SERIAL_8250_FSL) += 8250_fsl.o
obj-$(CONFIG_SERIAL_8250_MEN_MCB) += 8250_men_mcb.o
obj-$(CONFIG_SERIAL_8250_DW) += 8250_dw.o
obj-$(CONFIG_SERIAL_8250_EM) += 8250_em.o
obj-$(CONFIG_SERIAL_8250_OMAP) += 8250_omap.o

4
drivers/tty/serial/Kconfig
View File

@ -1689,7 +1689,7 @@ config SERIAL_MVEBU_CONSOLE
Otherwise, say 'N'.
config SERIAL_OWL
bool "Actions Semi Owl serial port support"
tristate "Actions Semi Owl serial port support"
depends on ARCH_ACTIONS || COMPILE_TEST
select SERIAL_CORE
help
@ -1705,7 +1705,7 @@ config SERIAL_OWL_CONSOLE
default y
help
Say 'Y' here if you wish to use Actions Semiconductor S500/S900 UART
as the system console. Only earlycon is implemented currently.
as the system console.
endmenu

2
drivers/tty/serial/amba-pl010.c
View File

@ -814,7 +814,7 @@ static int pl010_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(pl010_dev_pm_ops, pl010_suspend, pl010_resume);
static struct amba_id pl010_ids[] = {
static const struct amba_id pl010_ids[] = {
{
.id = 0x00041010,
.mask = 0x000fffff,

6
drivers/tty/serial/amba-pl011.c
View File

@ -128,7 +128,7 @@ static struct vendor_data vendor_arm = {
.get_fifosize = get_fifosize_arm,
};
static struct vendor_data vendor_sbsa = {
static const struct vendor_data vendor_sbsa = {
.reg_offset = pl011_std_offsets,
.fr_busy = UART01x_FR_BUSY,
.fr_dsr = UART01x_FR_DSR,
@ -143,7 +143,7 @@ static struct vendor_data vendor_sbsa = {
};
#ifdef CONFIG_ACPI_SPCR_TABLE
static struct vendor_data vendor_qdt_qdf2400_e44 = {
static const struct vendor_data vendor_qdt_qdf2400_e44 = {
.reg_offset = pl011_std_offsets,
.fr_busy = UART011_FR_TXFE,
.fr_dsr = UART01x_FR_DSR,
@ -2787,7 +2787,7 @@ static struct platform_driver arm_sbsa_uart_platform_driver = {
},
};
static struct amba_id pl011_ids[] = {
static const struct amba_id pl011_ids[] = {
{
.id = 0x00041011,
.mask = 0x000fffff,

2
drivers/tty/serial/apbuart.c
View File

@ -325,7 +325,7 @@ static int apbuart_verify_port(struct uart_port *port,
return ret;
}
static struct uart_ops grlib_apbuart_ops = {
static const struct uart_ops grlib_apbuart_ops = {
.tx_empty = apbuart_tx_empty,
.set_mctrl = apbuart_set_mctrl,
.get_mctrl = apbuart_get_mctrl,

4
drivers/tty/serial/arc_uart.c
View File

@ -549,8 +549,8 @@ static struct console arc_console = {
.data = &arc_uart_driver
};
static __init void arc_early_serial_write(struct console *con, const char *s,
unsigned int n)
static void arc_early_serial_write(struct console *con, const char *s,
unsigned int n)
{
struct earlycon_device *dev = con->data;

2
drivers/tty/serial/cpm_uart/cpm_uart_core.c
View File

@ -1123,7 +1123,7 @@ static void cpm_put_poll_char(struct uart_port *port,
}
#endif /* CONFIG_CONSOLE_POLL */
static struct uart_ops cpm_uart_pops = {
static const struct uart_ops cpm_uart_pops = {
.tx_empty = cpm_uart_tx_empty,
.set_mctrl = cpm_uart_set_mctrl,
.get_mctrl = cpm_uart_get_mctrl,

7
drivers/tty/serial/earlycon.c
View File

@ -220,7 +220,7 @@ static int __init param_setup_earlycon(char *buf)
if (IS_ENABLED(CONFIG_ACPI_SPCR_TABLE)) {
earlycon_init_is_deferred = true;
return 0;
} else {
} else if (!buf) {
return early_init_dt_scan_chosen_stdout();
}
}
@ -282,7 +282,12 @@ int __init of_setup_earlycon(const struct earlycon_id *match,
}
}
val = of_get_flat_dt_prop(node, "current-speed", NULL);
if (val)
early_console_dev.baud = be32_to_cpu(*val);
if (options) {
early_console_dev.baud = simple_strtoul(options, NULL, 0);
strlcpy(early_console_dev.options, options,
sizeof(early_console_dev.options));
}

76
drivers/tty/serial/fsl_lpuart.c
View File

@ -117,7 +117,7 @@
#define UARTSFIFO_TXOF 0x02
#define UARTSFIFO_RXUF 0x01
/* 32-bit register defination */
/* 32-bit register definition */
#define UARTBAUD 0x00
#define UARTSTAT 0x04
#define UARTCTRL 0x08
@ -521,6 +521,57 @@ static int lpuart_poll_get_char(struct uart_port *port)
return readb(port->membase + UARTDR);
}
static int lpuart32_poll_init(struct uart_port *port)
{
unsigned long flags;
struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
u32 temp;
sport->port.fifosize = 0;
spin_lock_irqsave(&sport->port.lock, flags);
/* Disable Rx & Tx */
writel(0, sport->port.membase + UARTCTRL);
temp = readl(sport->port.membase + UARTFIFO);
/* Enable Rx and Tx FIFO */
writel(temp | UARTFIFO_RXFE | UARTFIFO_TXFE,
sport->port.membase + UARTFIFO);
/* flush Tx and Rx FIFO */
writel(UARTFIFO_TXFLUSH | UARTFIFO_RXFLUSH,
sport->port.membase + UARTFIFO);
/* explicitly clear RDRF */
if (readl(sport->port.membase + UARTSTAT) & UARTSTAT_RDRF) {
readl(sport->port.membase + UARTDATA);
writel(UARTFIFO_RXUF, sport->port.membase + UARTFIFO);
}
/* Enable Rx and Tx */
writel(UARTCTRL_RE | UARTCTRL_TE, sport->port.membase + UARTCTRL);
spin_unlock_irqrestore(&sport->port.lock, flags);
return 0;
}
static void lpuart32_poll_put_char(struct uart_port *port, unsigned char c)
{
while (!(readl(port->membase + UARTSTAT) & UARTSTAT_TDRE))
barrier();
writel(c, port->membase + UARTDATA);
}
static int lpuart32_poll_get_char(struct uart_port *port)
{
if (!(readl(port->membase + UARTSTAT) & UARTSTAT_RDRF))
return NO_POLL_CHAR;
return readl(port->membase + UARTDATA);
}
#endif
static inline void lpuart_transmit_buffer(struct lpuart_port *sport)
@ -1025,6 +1076,11 @@ static int lpuart_config_rs485(struct uart_port *port,
~(UARTMODEM_TXRTSPOL | UARTMODEM_TXRTSE);
writeb(modem, sport->port.membase + UARTMODEM);
/* clear unsupported configurations */
rs485->delay_rts_before_send = 0;
rs485->delay_rts_after_send = 0;
rs485->flags &= ~SER_RS485_RX_DURING_TX;
if (rs485->flags & SER_RS485_ENABLED) {
/* Enable auto RS-485 RTS mode */
modem |= UARTMODEM_TXRTSE;
@ -1782,6 +1838,11 @@ static const struct uart_ops lpuart32_pops = {
.config_port = lpuart_config_port,
.verify_port = lpuart_verify_port,
.flush_buffer = lpuart_flush_buffer,
#if defined(CONFIG_CONSOLE_POLL)
.poll_init = lpuart32_poll_init,
.poll_get_char = lpuart32_poll_get_char,
.poll_put_char = lpuart32_poll_put_char,
#endif
};
static struct lpuart_port *lpuart_ports[UART_NR];
@ -2203,6 +2264,7 @@ static int lpuart_suspend(struct device *dev)
{
struct lpuart_port *sport = dev_get_drvdata(dev);
unsigned long temp;
bool irq_wake;
if (lpuart_is_32(sport)) {
/* disable Rx/Tx and interrupts */
@ -2218,6 +2280,9 @@ static int lpuart_suspend(struct device *dev)
uart_suspend_port(&lpuart_reg, &sport->port);
/* uart_suspend_port() might set wakeup flag */
irq_wake = irqd_is_wakeup_set(irq_get_irq_data(sport->port.irq));
if (sport->lpuart_dma_rx_use) {
/*
* EDMA driver during suspend will forcefully release any
@ -2226,7 +2291,7 @@ static int lpuart_suspend(struct device *dev)
* cannot resume as as expected, hence gracefully release the
* Rx DMA path before suspend and start Rx DMA path on resume.
*/
if (sport->port.irq_wake) {
if (irq_wake) {
del_timer_sync(&sport->lpuart_timer);
lpuart_dma_rx_free(&sport->port);
}
@ -2241,7 +2306,7 @@ static int lpuart_suspend(struct device *dev)
dmaengine_terminate_all(sport->dma_tx_chan);
}
if (sport->port.suspended && !sport->port.irq_wake)
if (sport->port.suspended && !irq_wake)
clk_disable_unprepare(sport->clk);
return 0;
@ -2250,9 +2315,10 @@ static int lpuart_suspend(struct device *dev)
static int lpuart_resume(struct device *dev)
{
struct lpuart_port *sport = dev_get_drvdata(dev);
bool irq_wake = irqd_is_wakeup_set(irq_get_irq_data(sport->port.irq));
unsigned long temp;
if (sport->port.suspended && !sport->port.irq_wake)
if (sport->port.suspended && !irq_wake)
clk_prepare_enable(sport->clk);
if (lpuart_is_32(sport)) {
@ -2269,7 +2335,7 @@ static int lpuart_resume(struct device *dev)
}
if (sport->lpuart_dma_rx_use) {
if (sport->port.irq_wake) {
if (irq_wake) {
if (!lpuart_start_rx_dma(sport))
rx_dma_timer_init(sport);
else

20
drivers/tty/serial/imx.c
View File

@ -226,7 +226,6 @@ struct imx_port {
dma_cookie_t rx_cookie;
unsigned int tx_bytes;
unsigned int dma_tx_nents;
wait_queue_head_t dma_wait;
unsigned int saved_reg[10];
bool context_saved;
};
@ -458,7 +457,10 @@ static inline void imx_transmit_buffer(struct imx_port *sport)
}
}
while (!uart_circ_empty(xmit) && !sport->dma_is_txing &&
if (sport->dma_is_txing)
return;
while (!uart_circ_empty(xmit) &&
!(readl(sport->port.membase + uts_reg(sport)) & UTS_TXFULL)) {
/* send xmit->buf[xmit->tail]
* out the port here */
@ -498,20 +500,12 @@ static void dma_tx_callback(void *data)
sport->dma_is_txing = 0;
spin_unlock_irqrestore(&sport->port.lock, flags);
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(&sport->port);
if (waitqueue_active(&sport->dma_wait)) {
wake_up(&sport->dma_wait);
dev_dbg(sport->port.dev, "exit in %s.\n", __func__);
return;
}
spin_lock_irqsave(&sport->port.lock, flags);
if (!uart_circ_empty(xmit) && !uart_tx_stopped(&sport->port))
imx_dma_tx(sport);
spin_unlock_irqrestore(&sport->port.lock, flags);
}
@ -1208,8 +1202,6 @@ static void imx_enable_dma(struct imx_port *sport)
{
unsigned long temp;
init_waitqueue_head(&sport->dma_wait);
/* set UCR1 */
temp = readl(sport->port.membase + UCR1);
temp |= UCR1_RDMAEN | UCR1_TDMAEN | UCR1_ATDMAEN;
@ -2332,6 +2324,7 @@ static int imx_serial_port_suspend(struct device *dev)
serial_imx_enable_wakeup(sport, true);
uart_suspend_port(&imx_reg, &sport->port);
disable_irq(sport->port.irq);
/* Needed to enable clock in suspend_noirq */
return clk_prepare(sport->clk_ipg);
@ -2346,6 +2339,7 @@ static int imx_serial_port_resume(struct device *dev)
serial_imx_enable_wakeup(sport, false);
uart_resume_port(&imx_reg, &sport->port);
enable_irq(sport->port.irq);
clk_unprepare(sport->clk_ipg);

2
drivers/tty/serial/jsm/jsm_driver.c
View File

@ -304,7 +304,7 @@ static void jsm_remove_one(struct pci_dev *pdev)
kfree(brd);
}
static struct pci_device_id jsm_pci_tbl[] = {
static const struct pci_device_id jsm_pci_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },

2
drivers/tty/serial/m32r_sio.c
View File

@ -854,7 +854,7 @@ m32r_sio_verify_port(struct uart_port *port, struct serial_struct *ser)
return 0;
}
static struct uart_ops m32r_sio_pops = {
static const struct uart_ops m32r_sio_pops = {
.tx_empty = m32r_sio_tx_empty,
.set_mctrl = m32r_sio_set_mctrl,
.get_mctrl = m32r_sio_get_mctrl,

2
drivers/tty/serial/meson_uart.c
View File

@ -424,7 +424,7 @@ static void meson_uart_config_port(struct uart_port *port, int flags)
}
}
static struct uart_ops meson_uart_ops = {
static const struct uart_ops meson_uart_ops = {
.set_mctrl = meson_uart_set_mctrl,
.get_mctrl = meson_uart_get_mctrl,
.tx_empty = meson_uart_tx_empty,

14
drivers/tty/serial/mpc52xx_uart.c
View File

@ -1347,7 +1347,7 @@ mpc52xx_uart_verify_port(struct uart_port *port, struct serial_struct *ser)
}
static struct uart_ops mpc52xx_uart_ops = {
static const struct uart_ops mpc52xx_uart_ops = {
.tx_empty = mpc52xx_uart_tx_empty,
.set_mctrl = mpc52xx_uart_set_mctrl,
.get_mctrl = mpc52xx_uart_get_mctrl,
@ -1634,8 +1634,8 @@ mpc52xx_console_setup(struct console *co, char *options)
return -EINVAL;
}
pr_debug("Console on ttyPSC%x is %s\n",
co->index, mpc52xx_uart_nodes[co->index]->full_name);
pr_debug("Console on ttyPSC%x is %pOF\n",
co->index, mpc52xx_uart_nodes[co->index]);
/* Fetch register locations */
ret = of_address_to_resource(np, 0, &res);
@ -1755,8 +1755,8 @@ static int mpc52xx_uart_of_probe(struct platform_device *op)
break;
if (idx >= MPC52xx_PSC_MAXNUM)
return -EINVAL;
pr_debug("Found %s assigned to ttyPSC%x\n",
mpc52xx_uart_nodes[idx]->full_name, idx);
pr_debug("Found %pOF assigned to ttyPSC%x\n",
mpc52xx_uart_nodes[idx], idx);
/* set the uart clock to the input clock of the psc, the different
* prescalers are taken into account in the set_baudrate() methods
@ -1881,8 +1881,8 @@ mpc52xx_uart_of_enumerate(void)
for (i = 0; i < MPC52xx_PSC_MAXNUM; i++) {
if (mpc52xx_uart_nodes[i])
pr_debug("%s assigned to ttyPSC%x\n",
mpc52xx_uart_nodes[i]->full_name, i);
pr_debug("%pOF assigned to ttyPSC%x\n",
mpc52xx_uart_nodes[i], i);
}
}

19
drivers/tty/serial/msm_serial.c
View File

@ -1175,11 +1175,6 @@ static int msm_startup(struct uart_port *port)
snprintf(msm_port->name, sizeof(msm_port->name),
"msm_serial%d", port->line);
ret = request_irq(port->irq, msm_uart_irq, IRQF_TRIGGER_HIGH,
msm_port->name, port);
if (unlikely(ret))
return ret;
msm_init_clock(port);
if (likely(port->fifosize > 12))
@ -1206,7 +1201,21 @@ static int msm_startup(struct uart_port *port)
msm_request_rx_dma(msm_port, msm_port->uart.mapbase);
}
ret = request_irq(port->irq, msm_uart_irq, IRQF_TRIGGER_HIGH,
msm_port->name, port);
if (unlikely(ret))
goto err_irq;
return 0;
err_irq:
if (msm_port->is_uartdm)
msm_release_dma(msm_port);
clk_disable_unprepare(msm_port->pclk);
clk_disable_unprepare(msm_port->clk);
return ret;
}
static void msm_shutdown(struct uart_port *port)

2
drivers/tty/serial/mux.c
View File

@ -427,7 +427,7 @@ static struct console mux_console = {
#define MUX_CONSOLE NULL
#endif
static struct uart_ops mux_pops = {
static const struct uart_ops mux_pops = {
.tx_empty = mux_tx_empty,
.set_mctrl = mux_set_mctrl,
.get_mctrl = mux_get_mctrl,

13
drivers/tty/serial/omap-serial.c
View File

@ -1235,21 +1235,20 @@ out:
#ifdef CONFIG_SERIAL_OMAP_CONSOLE
#ifdef CONFIG_SERIAL_EARLYCON
static unsigned int __init omap_serial_early_in(struct uart_port *port,
int offset)
static unsigned int omap_serial_early_in(struct uart_port *port, int offset)
{
offset <<= port->regshift;
return readw(port->membase + offset);
}
static void __init omap_serial_early_out(struct uart_port *port, int offset,
int value)
static void omap_serial_early_out(struct uart_port *port, int offset,
int value)
{
offset <<= port->regshift;
writew(value, port->membase + offset);
}
static void __init omap_serial_early_putc(struct uart_port *port, int c)
static void omap_serial_early_putc(struct uart_port *port, int c)
{
unsigned int status;
@ -1262,8 +1261,8 @@ static void __init omap_serial_early_putc(struct uart_port *port, int c)
omap_serial_early_out(port, UART_TX, c);
}
static void __init early_omap_serial_write(struct console *console,
const char *s, unsigned int count)
static void early_omap_serial_write(struct console *console, const char *s,
unsigned int count)
{
struct earlycon_device *device = console->data;
struct uart_port *port = &device->port;

635
drivers/tty/serial/owl-uart.c
View File

@ -20,6 +20,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/clk.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/io.h>
@ -28,22 +29,66 @@
#include <linux/platform_device.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#define OWL_UART_PORT_NUM 7
#define OWL_UART_DEV_NAME "ttyOWL"
#define OWL_UART_CTL 0x000
#define OWL_UART_RXDAT 0x004
#define OWL_UART_TXDAT 0x008
#define OWL_UART_STAT 0x00c
#define OWL_UART_CTL_DWLS_MASK GENMASK(1, 0)
#define OWL_UART_CTL_DWLS_5BITS (0x0 << 0)
#define OWL_UART_CTL_DWLS_6BITS (0x1 << 0)
#define OWL_UART_CTL_DWLS_7BITS (0x2 << 0)
#define OWL_UART_CTL_DWLS_8BITS (0x3 << 0)
#define OWL_UART_CTL_STPS_2BITS BIT(2)
#define OWL_UART_CTL_PRS_MASK GENMASK(6, 4)
#define OWL_UART_CTL_PRS_NONE (0x0 << 4)
#define OWL_UART_CTL_PRS_ODD (0x4 << 4)
#define OWL_UART_CTL_PRS_MARK (0x5 << 4)
#define OWL_UART_CTL_PRS_EVEN (0x6 << 4)
#define OWL_UART_CTL_PRS_SPACE (0x7 << 4)
#define OWL_UART_CTL_AFE BIT(12)
#define OWL_UART_CTL_TRFS_TX BIT(14)
#define OWL_UART_CTL_EN BIT(15)
#define OWL_UART_CTL_RXDE BIT(16)
#define OWL_UART_CTL_TXDE BIT(17)
#define OWL_UART_CTL_RXIE BIT(18)
#define OWL_UART_CTL_TXIE BIT(19)
#define OWL_UART_CTL_LBEN BIT(20)
#define OWL_UART_STAT_RIP BIT(0)
#define OWL_UART_STAT_TIP BIT(1)
#define OWL_UART_STAT_RXER BIT(2)
#define OWL_UART_STAT_TFER BIT(3)
#define OWL_UART_STAT_RXST BIT(4)
#define OWL_UART_STAT_RFEM BIT(5)
#define OWL_UART_STAT_TFFU BIT(6)
#define OWL_UART_STAT_TRFL_MASK (0x1f << 11)
#define OWL_UART_STAT_CTSS BIT(7)
#define OWL_UART_STAT_RTSS BIT(8)
#define OWL_UART_STAT_TFES BIT(10)
#define OWL_UART_STAT_TRFL_MASK GENMASK(16, 11)
#define OWL_UART_STAT_UTBB BIT(17)
static struct uart_driver owl_uart_driver;
struct owl_uart_info {
unsigned int tx_fifosize;
};
struct owl_uart_port {
struct uart_port port;
struct clk *clk;
};
#define to_owl_uart_port(prt) container_of(prt, struct owl_uart_port, prt)
static struct owl_uart_port *owl_uart_ports[OWL_UART_PORT_NUM];
static inline void owl_uart_write(struct uart_port *port, u32 val, unsigned int off)
{
writel(val, port->membase + off);
@ -54,6 +99,397 @@ static inline u32 owl_uart_read(struct uart_port *port, unsigned int off)
return readl(port->membase + off);
}
static void owl_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
u32 ctl;
ctl = owl_uart_read(port, OWL_UART_CTL);
if (mctrl & TIOCM_LOOP)
ctl |= OWL_UART_CTL_LBEN;
else
ctl &= ~OWL_UART_CTL_LBEN;
owl_uart_write(port, ctl, OWL_UART_CTL);
}
static unsigned int owl_uart_get_mctrl(struct uart_port *port)
{
unsigned int mctrl = TIOCM_CAR | TIOCM_DSR;
u32 stat, ctl;
ctl = owl_uart_read(port, OWL_UART_CTL);
stat = owl_uart_read(port, OWL_UART_STAT);
if (stat & OWL_UART_STAT_RTSS)
mctrl |= TIOCM_RTS;
if ((stat & OWL_UART_STAT_CTSS) || !(ctl & OWL_UART_CTL_AFE))
mctrl |= TIOCM_CTS;
return mctrl;
}
static unsigned int owl_uart_tx_empty(struct uart_port *port)
{
unsigned long flags;
u32 val;
unsigned int ret;
spin_lock_irqsave(&port->lock, flags);
val = owl_uart_read(port, OWL_UART_STAT);
ret = (val & OWL_UART_STAT_TFES) ? TIOCSER_TEMT : 0;
spin_unlock_irqrestore(&port->lock, flags);
return ret;
}
static void owl_uart_stop_rx(struct uart_port *port)
{
u32 val;
val = owl_uart_read(port, OWL_UART_CTL);
val &= ~(OWL_UART_CTL_RXIE | OWL_UART_CTL_RXDE);
owl_uart_write(port, val, OWL_UART_CTL);
val = owl_uart_read(port, OWL_UART_STAT);
val |= OWL_UART_STAT_RIP;
owl_uart_write(port, val, OWL_UART_STAT);
}
static void owl_uart_stop_tx(struct uart_port *port)
{
u32 val;
val = owl_uart_read(port, OWL_UART_CTL);
val &= ~(OWL_UART_CTL_TXIE | OWL_UART_CTL_TXDE);
owl_uart_write(port, val, OWL_UART_CTL);
val = owl_uart_read(port, OWL_UART_STAT);
val |= OWL_UART_STAT_TIP;
owl_uart_write(port, val, OWL_UART_STAT);
}
static void owl_uart_start_tx(struct uart_port *port)
{
u32 val;
if (uart_tx_stopped(port)) {
owl_uart_stop_tx(port);
return;
}
val = owl_uart_read(port, OWL_UART_STAT);
val |= OWL_UART_STAT_TIP;
owl_uart_write(port, val, OWL_UART_STAT);
val = owl_uart_read(port, OWL_UART_CTL);
val |= OWL_UART_CTL_TXIE;
owl_uart_write(port, val, OWL_UART_CTL);
}
static void owl_uart_send_chars(struct uart_port *port)
{
struct circ_buf *xmit = &port->state->xmit;
unsigned int ch;
if (uart_tx_stopped(port))
return;
if (port->x_char) {
while (!(owl_uart_read(port, OWL_UART_STAT) & OWL_UART_STAT_TFFU))
cpu_relax();
owl_uart_write(port, port->x_char, OWL_UART_TXDAT);
port->icount.tx++;
port->x_char = 0;
}
while (!(owl_uart_read(port, OWL_UART_STAT) & OWL_UART_STAT_TFFU)) {
if (uart_circ_empty(xmit))
break;
ch = xmit->buf[xmit->tail];
owl_uart_write(port, ch, OWL_UART_TXDAT);
xmit->tail = (xmit->tail + 1) & (SERIAL_XMIT_SIZE - 1);
port->icount.tx++;
}
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
if (uart_circ_empty(xmit))
owl_uart_stop_tx(port);
}
static void owl_uart_receive_chars(struct uart_port *port)
{
u32 stat, val;
val = owl_uart_read(port, OWL_UART_CTL);
val &= ~OWL_UART_CTL_TRFS_TX;
owl_uart_write(port, val, OWL_UART_CTL);
stat = owl_uart_read(port, OWL_UART_STAT);
while (!(stat & OWL_UART_STAT_RFEM)) {
char flag = TTY_NORMAL;
if (stat & OWL_UART_STAT_RXER)
port->icount.overrun++;
if (stat & OWL_UART_STAT_RXST) {
/* We are not able to distinguish the error type. */
port->icount.brk++;
port->icount.frame++;
stat &= port->read_status_mask;
if (stat & OWL_UART_STAT_RXST)
flag = TTY_PARITY;
} else
port->icount.rx++;
val = owl_uart_read(port, OWL_UART_RXDAT);
val &= 0xff;
if ((stat & port->ignore_status_mask) == 0)
tty_insert_flip_char(&port->state->port, val, flag);
stat = owl_uart_read(port, OWL_UART_STAT);
}
spin_unlock(&port->lock);
tty_flip_buffer_push(&port->state->port);
spin_lock(&port->lock);
}
static irqreturn_t owl_uart_irq(int irq, void *dev_id)
{
struct uart_port *port = dev_id;
unsigned long flags;
u32 stat;
spin_lock_irqsave(&port->lock, flags);
stat = owl_uart_read(port, OWL_UART_STAT);
if (stat & OWL_UART_STAT_RIP)
owl_uart_receive_chars(port);
if (stat & OWL_UART_STAT_TIP)
owl_uart_send_chars(port);
stat = owl_uart_read(port, OWL_UART_STAT);
stat |= OWL_UART_STAT_RIP | OWL_UART_STAT_TIP;
owl_uart_write(port, stat, OWL_UART_STAT);
spin_unlock_irqrestore(&port->lock, flags);
return IRQ_HANDLED;
}
static void owl_uart_shutdown(struct uart_port *port)
{
u32 val;
unsigned long flags;
spin_lock_irqsave(&port->lock, flags);
val = owl_uart_read(port, OWL_UART_CTL);
val &= ~(OWL_UART_CTL_TXIE | OWL_UART_CTL_RXIE
| OWL_UART_CTL_TXDE | OWL_UART_CTL_RXDE | OWL_UART_CTL_EN);
owl_uart_write(port, val, OWL_UART_CTL);
spin_unlock_irqrestore(&port->lock, flags);
free_irq(port->irq, port);
}
static int owl_uart_startup(struct uart_port *port)
{
u32 val;
unsigned long flags;
int ret;
ret = request_irq(port->irq, owl_uart_irq, IRQF_TRIGGER_HIGH,
"owl-uart", port);
if (ret)
return ret;
spin_lock_irqsave(&port->lock, flags);
val = owl_uart_read(port, OWL_UART_STAT);
val |= OWL_UART_STAT_RIP | OWL_UART_STAT_TIP
| OWL_UART_STAT_RXER | OWL_UART_STAT_TFER | OWL_UART_STAT_RXST;
owl_uart_write(port, val, OWL_UART_STAT);
val = owl_uart_read(port, OWL_UART_CTL);
val |= OWL_UART_CTL_RXIE | OWL_UART_CTL_TXIE;
val |= OWL_UART_CTL_EN;
owl_uart_write(port, val, OWL_UART_CTL);
spin_unlock_irqrestore(&port->lock, flags);
return 0;
}
static void owl_uart_change_baudrate(struct owl_uart_port *owl_port,
unsigned long baud)
{
clk_set_rate(owl_port->clk, baud * 8);
}
static void owl_uart_set_termios(struct uart_port *port,
struct ktermios *termios,
struct ktermios *old)
{
struct owl_uart_port *owl_port = to_owl_uart_port(port);
unsigned int baud;
u32 ctl;
unsigned long flags;
spin_lock_irqsave(&port->lock, flags);
ctl = owl_uart_read(port, OWL_UART_CTL);
ctl &= ~OWL_UART_CTL_DWLS_MASK;
switch (termios->c_cflag & CSIZE) {
case CS5:
ctl |= OWL_UART_CTL_DWLS_5BITS;
break;
case CS6:
ctl |= OWL_UART_CTL_DWLS_6BITS;
break;
case CS7:
ctl |= OWL_UART_CTL_DWLS_7BITS;
break;
case CS8:
default:
ctl |= OWL_UART_CTL_DWLS_8BITS;
break;
}
if (termios->c_cflag & CSTOPB)
ctl |= OWL_UART_CTL_STPS_2BITS;
else
ctl &= ~OWL_UART_CTL_STPS_2BITS;
ctl &= ~OWL_UART_CTL_PRS_MASK;
if (termios->c_cflag & PARENB) {
if (termios->c_cflag & CMSPAR) {
if (termios->c_cflag & PARODD)
ctl |= OWL_UART_CTL_PRS_MARK;
else
ctl |= OWL_UART_CTL_PRS_SPACE;
} else if (termios->c_cflag & PARODD)
ctl |= OWL_UART_CTL_PRS_ODD;
else
ctl |= OWL_UART_CTL_PRS_EVEN;
} else
ctl |= OWL_UART_CTL_PRS_NONE;
if (termios->c_cflag & CRTSCTS)
ctl |= OWL_UART_CTL_AFE;
else
ctl &= ~OWL_UART_CTL_AFE;
owl_uart_write(port, ctl, OWL_UART_CTL);
baud = uart_get_baud_rate(port, termios, old, 9600, 3200000);
owl_uart_change_baudrate(owl_port, baud);
/* Don't rewrite B0 */
if (tty_termios_baud_rate(termios))
tty_termios_encode_baud_rate(termios, baud, baud);
port->read_status_mask |= OWL_UART_STAT_RXER;
if (termios->c_iflag & INPCK)
port->read_status_mask |= OWL_UART_STAT_RXST;
uart_update_timeout(port, termios->c_cflag, baud);
spin_unlock_irqrestore(&port->lock, flags);
}
static void owl_uart_release_port(struct uart_port *port)
{
struct platform_device *pdev = to_platform_device(port->dev);
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return;
if (port->flags & UPF_IOREMAP) {
devm_release_mem_region(port->dev, port->mapbase,
resource_size(res));
devm_iounmap(port->dev, port->membase);
port->membase = NULL;
}
}
static int owl_uart_request_port(struct uart_port *port)
{
struct platform_device *pdev = to_platform_device(port->dev);
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENXIO;
if (!devm_request_mem_region(port->dev, port->mapbase,
resource_size(res), dev_name(port->dev)))
return -EBUSY;
if (port->flags & UPF_IOREMAP) {
port->membase = devm_ioremap_nocache(port->dev, port->mapbase,
resource_size(res));
if (!port->membase)
return -EBUSY;
}
return 0;
}
static const char *owl_uart_type(struct uart_port *port)
{
return (port->type == PORT_OWL) ? "owl-uart" : NULL;
}
static int owl_uart_verify_port(struct uart_port *port,
struct serial_struct *ser)
{
if (port->type != PORT_OWL)
return -EINVAL;
if (port->irq != ser->irq)
return -EINVAL;
return 0;
}
static void owl_uart_config_port(struct uart_port *port, int flags)
{
if (flags & UART_CONFIG_TYPE) {
port->type = PORT_OWL;
owl_uart_request_port(port);
}
}
static const struct uart_ops owl_uart_ops = {
.set_mctrl = owl_uart_set_mctrl,
.get_mctrl = owl_uart_get_mctrl,
.tx_empty = owl_uart_tx_empty,
.start_tx = owl_uart_start_tx,
.stop_rx = owl_uart_stop_rx,
.stop_tx = owl_uart_stop_tx,
.startup = owl_uart_startup,
.shutdown = owl_uart_shutdown,
.set_termios = owl_uart_set_termios,
.type = owl_uart_type,
.config_port = owl_uart_config_port,
.request_port = owl_uart_request_port,
.release_port = owl_uart_release_port,
.verify_port = owl_uart_verify_port,
};
#ifdef CONFIG_SERIAL_OWL_CONSOLE
static void owl_console_putchar(struct uart_port *port, int ch)
@ -110,6 +546,57 @@ static void owl_uart_port_write(struct uart_port *port, const char *s,
local_irq_restore(flags);
}
static void owl_uart_console_write(struct console *co, const char *s,
u_int count)
{
struct owl_uart_port *owl_port;
owl_port = owl_uart_ports[co->index];
if (!owl_port)
return;
owl_uart_port_write(&owl_port->port, s, count);
}
static int owl_uart_console_setup(struct console *co, char *options)
{
struct owl_uart_port *owl_port;
int baud = 115200;
int bits = 8;
int parity = 'n';
int flow = 'n';
if (co->index < 0 || co->index >= OWL_UART_PORT_NUM)
return -EINVAL;
owl_port = owl_uart_ports[co->index];
if (!owl_port || !owl_port->port.membase)
return -ENODEV;
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
return uart_set_options(&owl_port->port, co, baud, parity, bits, flow);
}
static struct console owl_uart_console = {
.name = OWL_UART_DEV_NAME,
.write = owl_uart_console_write,
.device = uart_console_device,
.setup = owl_uart_console_setup,
.flags = CON_PRINTBUFFER,
.index = -1,
.data = &owl_uart_driver,
};
static int __init owl_uart_console_init(void)
{
register_console(&owl_uart_console);
return 0;
}
console_initcall(owl_uart_console_init);
static void owl_uart_early_console_write(struct console *co,
const char *s,
u_int count)
@ -132,4 +619,148 @@ owl_uart_early_console_setup(struct earlycon_device *device, const char *opt)
OF_EARLYCON_DECLARE(owl, "actions,owl-uart",
owl_uart_early_console_setup);
#endif /* CONFIG_SERIAL_OWL_CONSOLE */
#define OWL_UART_CONSOLE (&owl_uart_console)
#else
#define OWL_UART_CONSOLE NULL
#endif
static struct uart_driver owl_uart_driver = {
.owner = THIS_MODULE,
.driver_name = "owl-uart",
.dev_name = OWL_UART_DEV_NAME,
.nr = OWL_UART_PORT_NUM,
.cons = OWL_UART_CONSOLE,
};
static const struct owl_uart_info owl_s500_info = {
.tx_fifosize = 16,
};
static const struct owl_uart_info owl_s900_info = {
.tx_fifosize = 32,
};
static const struct of_device_id owl_uart_dt_matches[] = {
{ .compatible = "actions,s500-uart", .data = &owl_s500_info },
{ .compatible = "actions,s900-uart", .data = &owl_s900_info },
{ }
};
MODULE_DEVICE_TABLE(of, owl_uart_dt_matches);
static int owl_uart_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
const struct owl_uart_info *info = NULL;
struct resource *res_mem;
struct owl_uart_port *owl_port;
int ret, irq;
if (pdev->dev.of_node) {
pdev->id = of_alias_get_id(pdev->dev.of_node, "serial");
match = of_match_node(owl_uart_dt_matches, pdev->dev.of_node);
if (match)
info = match->data;
}
if (pdev->id < 0 || pdev->id >= OWL_UART_PORT_NUM) {
dev_err(&pdev->dev, "id %d out of range\n", pdev->id);
return -EINVAL;
}
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res_mem) {
dev_err(&pdev->dev, "could not get mem\n");
return -ENODEV;
}
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "could not get irq\n");
return irq;
}
if (owl_uart_ports[pdev->id]) {
dev_err(&pdev->dev, "port %d already allocated\n", pdev->id);
return -EBUSY;
}
owl_port = devm_kzalloc(&pdev->dev, sizeof(*owl_port), GFP_KERNEL);
if (!owl_port)
return -ENOMEM;
owl_port->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(owl_port->clk)) {
dev_err(&pdev->dev, "could not get clk\n");
return PTR_ERR(owl_port->clk);
}
owl_port->port.dev = &pdev->dev;
owl_port->port.line = pdev->id;
owl_port->port.type = PORT_OWL;
owl_port->port.iotype = UPIO_MEM;
owl_port->port.mapbase = res_mem->start;
owl_port->port.irq = irq;
owl_port->port.uartclk = clk_get_rate(owl_port->clk);
if (owl_port->port.uartclk == 0) {
dev_err(&pdev->dev, "clock rate is zero\n");
return -EINVAL;
}
owl_port->port.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_LOW_LATENCY;
owl_port->port.x_char = 0;
owl_port->port.fifosize = (info) ? info->tx_fifosize : 16;
owl_port->port.ops = &owl_uart_ops;
owl_uart_ports[pdev->id] = owl_port;
platform_set_drvdata(pdev, owl_port);
ret = uart_add_one_port(&owl_uart_driver, &owl_port->port);
if (ret)
owl_uart_ports[pdev->id] = NULL;
return ret;
}
static int owl_uart_remove(struct platform_device *pdev)
{
struct owl_uart_port *owl_port = platform_get_drvdata(pdev);
uart_remove_one_port(&owl_uart_driver, &owl_port->port);
owl_uart_ports[pdev->id] = NULL;
return 0;
}
static struct platform_driver owl_uart_platform_driver = {
.probe = owl_uart_probe,
.remove = owl_uart_remove,
.driver = {
.name = "owl-uart",
.of_match_table = owl_uart_dt_matches,
},
};
static int __init owl_uart_init(void)
{
int ret;
ret = uart_register_driver(&owl_uart_driver);
if (ret)
return ret;
ret = platform_driver_register(&owl_uart_platform_driver);
if (ret)
uart_unregister_driver(&owl_uart_driver);
return ret;
}
static void __init owl_uart_exit(void)
{
platform_driver_unregister(&owl_uart_platform_driver);
uart_unregister_driver(&owl_uart_driver);
}
module_init(owl_uart_init);
module_exit(owl_uart_exit);
MODULE_LICENSE("GPL");

38
drivers/tty/serial/pch_uart.c
View File

@ -46,11 +46,6 @@ enum {
PCH_UART_HANDLED_LS_INT_SHIFT,
};
enum {
PCH_UART_8LINE,
PCH_UART_2LINE,
};
#define PCH_UART_DRIVER_DEVICE "ttyPCH"
/* Set the max number of UART port
@ -267,7 +262,7 @@ struct eg20t_port {
/**
* struct pch_uart_driver_data - private data structure for UART-DMA
* @port_type: The number of DMA channel
* @port_type: The type of UART port
* @line_no: UART port line number (0, 1, 2...)
*/
struct pch_uart_driver_data {
@ -290,17 +285,17 @@ enum pch_uart_num_t {
};
static struct pch_uart_driver_data drv_dat[] = {
[pch_et20t_uart0] = {PCH_UART_8LINE, 0},
[pch_et20t_uart1] = {PCH_UART_2LINE, 1},
[pch_et20t_uart2] = {PCH_UART_2LINE, 2},
[pch_et20t_uart3] = {PCH_UART_2LINE, 3},
[pch_ml7213_uart0] = {PCH_UART_8LINE, 0},
[pch_ml7213_uart1] = {PCH_UART_2LINE, 1},
[pch_ml7213_uart2] = {PCH_UART_2LINE, 2},
[pch_ml7223_uart0] = {PCH_UART_8LINE, 0},
[pch_ml7223_uart1] = {PCH_UART_2LINE, 1},
[pch_ml7831_uart0] = {PCH_UART_8LINE, 0},
[pch_ml7831_uart1] = {PCH_UART_2LINE, 1},
[pch_et20t_uart0] = {PORT_PCH_8LINE, 0},
[pch_et20t_uart1] = {PORT_PCH_2LINE, 1},
[pch_et20t_uart2] = {PORT_PCH_2LINE, 2},
[pch_et20t_uart3] = {PORT_PCH_2LINE, 3},
[pch_ml7213_uart0] = {PORT_PCH_8LINE, 0},
[pch_ml7213_uart1] = {PORT_PCH_2LINE, 1},
[pch_ml7213_uart2] = {PORT_PCH_2LINE, 2},
[pch_ml7223_uart0] = {PORT_PCH_8LINE, 0},
[pch_ml7223_uart1] = {PORT_PCH_2LINE, 1},
[pch_ml7831_uart0] = {PORT_PCH_8LINE, 0},
[pch_ml7831_uart1] = {PORT_PCH_2LINE, 1},
};
#ifdef CONFIG_SERIAL_PCH_UART_CONSOLE
@ -1777,10 +1772,10 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
goto init_port_free_txbuf;
switch (port_type) {
case PORT_UNKNOWN:
case PORT_PCH_8LINE:
fifosize = 256; /* EG20T/ML7213: UART0 */
break;
case PORT_8250:
case PORT_PCH_2LINE:
fifosize = 64; /* EG20T:UART1~3 ML7213: UART1~2*/
break;
default:
@ -1804,7 +1799,7 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
priv->fifo_size = fifosize;
priv->uartclk = pch_uart_get_uartclk();
priv->port_type = PORT_MAX_8250 + port_type + 1;
priv->port_type = port_type;
priv->port.dev = &pdev->dev;
priv->port.iobase = iobase;
priv->port.membase = NULL;
@ -1862,8 +1857,7 @@ static void pch_uart_exit_port(struct eg20t_port *priv)
{
#ifdef CONFIG_DEBUG_FS
if (priv->debugfs)
debugfs_remove(priv->debugfs);
debugfs_remove(priv->debugfs);
#endif
uart_remove_one_port(&pch_uart_driver, &priv->port);
free_page((unsigned long)priv->rxbuf.buf);

4
drivers/tty/serial/pmac_zilog.c
View File

@ -1671,8 +1671,8 @@ static int __init pmz_probe(void)
if (!node_a && !node_b) {
of_node_put(node_a);
of_node_put(node_b);
printk(KERN_ERR "pmac_zilog: missing node %c for escc %s\n",
(!node_a) ? 'a' : 'b', node_p->full_name);
printk(KERN_ERR "pmac_zilog: missing node %c for escc %pOF\n",
(!node_a) ? 'a' : 'b', node_p);
continue;
}

2
drivers/tty/serial/serial-tegra.c
View File

@ -1310,7 +1310,7 @@ static int tegra_uart_probe(struct platform_device *pdev)
return PTR_ERR(tup->uart_clk);
}
tup->rst = devm_reset_control_get(&pdev->dev, "serial");
tup->rst = devm_reset_control_get_exclusive(&pdev->dev, "serial");
if (IS_ERR(tup->rst)) {
dev_err(&pdev->dev, "Couldn't get the reset\n");
return PTR_ERR(tup->rst);

47
drivers/tty/serial/serial_core.c
View File

@ -36,7 +36,7 @@
#include <linux/delay.h>
#include <linux/mutex.h>
#include <asm/irq.h>
#include <linux/irq.h>
#include <linux/uaccess.h>
/*
@ -165,6 +165,27 @@ uart_update_mctrl(struct uart_port *port, unsigned int set, unsigned int clear)
#define uart_set_mctrl(port, set) uart_update_mctrl(port, set, 0)
#define uart_clear_mctrl(port, clear) uart_update_mctrl(port, 0, clear)
static void uart_port_dtr_rts(struct uart_port *uport, int raise)
{
int rs485_on = uport->rs485_config &&
(uport->rs485.flags & SER_RS485_ENABLED);
int RTS_after_send = !!(uport->rs485.flags & SER_RS485_RTS_AFTER_SEND);
if (raise) {
if (rs485_on && !RTS_after_send) {
uart_set_mctrl(uport, TIOCM_DTR);
uart_clear_mctrl(uport, TIOCM_RTS);
} else {
uart_set_mctrl(uport, TIOCM_DTR | TIOCM_RTS);
}
} else {
unsigned int clear = TIOCM_DTR;
clear |= (!rs485_on || !RTS_after_send) ? TIOCM_RTS : 0;
uart_clear_mctrl(uport, clear);
}
}
/*
* Startup the port. This will be called once per open. All calls
* will be serialised by the per-port mutex.
@ -214,7 +235,7 @@ static int uart_port_startup(struct tty_struct *tty, struct uart_state *state,
* port is open and ready to respond.
*/
if (init_hw && C_BAUD(tty))
uart_set_mctrl(uport, TIOCM_RTS | TIOCM_DTR);
uart_port_dtr_rts(uport, 1);
}
/*
@ -272,7 +293,7 @@ static void uart_shutdown(struct tty_struct *tty, struct uart_state *state)
uport->cons->cflag = tty->termios.c_cflag;
if (!tty || C_HUPCL(tty))
uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS);
uart_port_dtr_rts(uport, 0);
uart_port_shutdown(port);
}
@ -744,7 +765,7 @@ static int uart_get_info(struct tty_port *port, struct serial_struct *retinfo)
if (HIGH_BITS_OFFSET)
retinfo->port_high = (long) uport->iobase >> HIGH_BITS_OFFSET;
retinfo->irq = uport->irq;
retinfo->flags = uport->flags;
retinfo->flags = (__force int)uport->flags;
retinfo->xmit_fifo_size = uport->fifosize;
retinfo->baud_base = uport->uartclk / 16;
retinfo->close_delay = jiffies_to_msecs(port->close_delay) / 10;
@ -818,7 +839,7 @@ static int uart_set_info(struct tty_struct *tty, struct tty_port *port,
new_info->type != uport->type);
old_flags = uport->flags;
new_flags = new_info->flags;
new_flags = (__force upf_t)new_info->flags;
old_custom_divisor = uport->custom_divisor;
if (!capable(CAP_SYS_ADMIN)) {
@ -1658,7 +1679,7 @@ static int uart_carrier_raised(struct tty_port *port)
return 0;
}
static void uart_dtr_rts(struct tty_port *port, int onoff)
static void uart_dtr_rts(struct tty_port *port, int raise)
{
struct uart_state *state = container_of(port, struct uart_state, port);
struct uart_port *uport;
@ -1666,12 +1687,7 @@ static void uart_dtr_rts(struct tty_port *port, int onoff)
uport = uart_port_ref(state);
if (!uport)
return;
if (onoff)
uart_set_mctrl(uport, TIOCM_DTR | TIOCM_RTS);
else
uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS);
uart_port_dtr_rts(uport, raise);
uart_port_deref(uport);
}
@ -2083,8 +2099,7 @@ int uart_suspend_port(struct uart_driver *drv, struct uart_port *uport)
tty_dev = device_find_child(uport->dev, &match, serial_match_port);
if (tty_dev && device_may_wakeup(tty_dev)) {
if (!enable_irq_wake(uport->irq))
uport->irq_wake = 1;
enable_irq_wake(uport->irq);
put_device(tty_dev);
mutex_unlock(&port->mutex);
return 0;
@ -2147,10 +2162,8 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *uport)
tty_dev = device_find_child(uport->dev, &match, serial_match_port);
if (!uport->suspended && device_may_wakeup(tty_dev)) {
if (uport->irq_wake) {
if (irqd_is_wakeup_set(irq_get_irq_data((uport->irq))))
disable_irq_wake(uport->irq);
uport->irq_wake = 0;
}
put_device(tty_dev);
mutex_unlock(&port->mutex);
return 0;

3
drivers/tty/serial/sh-sci.c
View File

@ -3073,8 +3073,7 @@ static struct plat_sci_port *sci_parse_dt(struct platform_device *pdev,
p->type = SCI_OF_TYPE(match->data);
p->regtype = SCI_OF_REGTYPE(match->data);
if (of_find_property(np, "uart-has-rtscts", NULL))
sp->has_rtscts = true;
sp->has_rtscts = of_property_read_bool(np, "uart-has-rtscts");
return p;
}

8
drivers/tty/serial/sprd_serial.c
View File

@ -63,6 +63,7 @@
/* interrupt clear register */
#define SPRD_ICLR 0x0014
#define SPRD_ICLR_TIMEOUT BIT(13)
/* line control register */
#define SPRD_LCR 0x0018
@ -298,7 +299,8 @@ static irqreturn_t sprd_handle_irq(int irq, void *dev_id)
return IRQ_NONE;
}
serial_out(port, SPRD_ICLR, ~0);
if (ims & SPRD_IMSR_TIMEOUT)
serial_out(port, SPRD_ICLR, SPRD_ICLR_TIMEOUT);
if (ims & (SPRD_IMSR_RX_FIFO_FULL |
SPRD_IMSR_BREAK_DETECT | SPRD_IMSR_TIMEOUT))
@ -729,8 +731,8 @@ static int sprd_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "not provide irq resource\n");
return -ENODEV;
dev_err(&pdev->dev, "not provide irq resource: %d\n", irq);
return irq;
}
up->irq = irq;

2
drivers/tty/serial/st-asc.c
View File

@ -310,7 +310,7 @@ static void asc_receive_chars(struct uart_port *port)
if (mode == ASC_CTL_MODE_8BIT || mode == ASC_CTL_MODE_8BIT_PAR)
ignore_pe = true;
if (port->irq_wake)
if (irqd_is_wakeup_set(irq_get_irq_data(port->irq)))
pm_wakeup_event(tport->tty->dev, 0);
while ((status = asc_in(port, ASC_STA)) & ASC_STA_RBF) {

125
drivers/tty/serial/stm32-usart.c
View File

@ -1,5 +1,6 @@
/*
* Copyright (C) Maxime Coquelin 2015
* Copyright (C) STMicroelectronics SA 2017
* Authors: Maxime Coquelin <mcoquelin.stm32@gmail.com>
* Gerald Baeza <gerald.baeza@st.com>
* License terms: GNU General Public License (GPL), version 2
@ -25,6 +26,7 @@
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/pm_wakeirq.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
#include <linux/spinlock.h>
@ -110,14 +112,13 @@ static void stm32_receive_chars(struct uart_port *port, bool threaded)
unsigned long c;
u32 sr;
char flag;
static int last_res = RX_BUF_L;
if (port->irq_wake)
if (irqd_is_wakeup_set(irq_get_irq_data(port->irq)))
pm_wakeup_event(tport->tty->dev, 0);
while (stm32_pending_rx(port, &sr, &last_res, threaded)) {
while (stm32_pending_rx(port, &sr, &stm32_port->last_res, threaded)) {
sr |= USART_SR_DUMMY_RX;
c = stm32_get_char(port, &sr, &last_res);
c = stm32_get_char(port, &sr, &stm32_port->last_res);
flag = TTY_NORMAL;
port->icount.rx++;
@ -202,7 +203,7 @@ static void stm32_transmit_chars_pio(struct uart_port *port)
ret = readl_relaxed_poll_timeout_atomic(port->membase + ofs->isr,
isr,
(isr & USART_SR_TXE),
10, 100);
10, 100000);
if (ret)
dev_err(port->dev, "tx empty not set\n");
@ -326,6 +327,10 @@ static irqreturn_t stm32_interrupt(int irq, void *ptr)
sr = readl_relaxed(port->membase + ofs->isr);
if ((sr & USART_SR_WUF) && (ofs->icr != UNDEF_REG))
writel_relaxed(USART_ICR_WUCF,
port->membase + ofs->icr);
if ((sr & USART_SR_RXNE) && !(stm32_port->rx_ch))
stm32_receive_chars(port, false);
@ -442,6 +447,7 @@ static int stm32_startup(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
struct stm32_usart_config *cfg = &stm32_port->info->cfg;
const char *name = to_platform_device(port->dev)->name;
u32 val;
int ret;
@ -452,7 +458,18 @@ static int stm32_startup(struct uart_port *port)
if (ret)
return ret;
if (cfg->has_wakeup && stm32_port->wakeirq >= 0) {
ret = dev_pm_set_dedicated_wake_irq(port->dev,
stm32_port->wakeirq);
if (ret) {
free_irq(port->irq, port);
return ret;
}
}
val = USART_CR1_RXNEIE | USART_CR1_TE | USART_CR1_RE;
if (stm32_port->fifoen)
val |= USART_CR1_FIFOEN;
stm32_set_bits(port, ofs->cr1, val);
return 0;
@ -467,8 +484,11 @@ static void stm32_shutdown(struct uart_port *port)
val = USART_CR1_TXEIE | USART_CR1_RXNEIE | USART_CR1_TE | USART_CR1_RE;
val |= BIT(cfg->uart_enable_bit);
if (stm32_port->fifoen)
val |= USART_CR1_FIFOEN;
stm32_clr_bits(port, ofs->cr1, val);
dev_pm_clear_wake_irq(port->dev);
free_irq(port->irq, port);
}
@ -496,6 +516,8 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
cr1 = USART_CR1_TE | USART_CR1_RE | USART_CR1_RXNEIE;
cr1 |= BIT(cfg->uart_enable_bit);
if (stm32_port->fifoen)
cr1 |= USART_CR1_FIFOEN;
cr2 = 0;
cr3 = 0;
@ -518,7 +540,7 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
port->status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS);
if (cflag & CRTSCTS) {
port->status |= UPSTAT_AUTOCTS | UPSTAT_AUTORTS;
cr3 |= USART_CR3_CTSE;
cr3 |= USART_CR3_CTSE | USART_CR3_RTSE;
}
usartdiv = DIV_ROUND_CLOSEST(port->uartclk, baud);
@ -659,6 +681,8 @@ static int stm32_init_port(struct stm32_port *stm32port,
port->ops = &stm32_uart_ops;
port->dev = &pdev->dev;
port->irq = platform_get_irq(pdev, 0);
stm32port->wakeirq = platform_get_irq(pdev, 1);
stm32port->fifoen = stm32port->info->cfg.has_fifo;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
port->membase = devm_ioremap_resource(&pdev->dev, res);
@ -678,8 +702,10 @@ static int stm32_init_port(struct stm32_port *stm32port,
return ret;
stm32port->port.uartclk = clk_get_rate(stm32port->clk);
if (!stm32port->port.uartclk)
if (!stm32port->port.uartclk) {
clk_disable_unprepare(stm32port->clk);
ret = -EINVAL;
}
return ret;
}
@ -693,8 +719,10 @@ static struct stm32_port *stm32_of_get_stm32_port(struct platform_device *pdev)
return NULL;
id = of_alias_get_id(np, "serial");
if (id < 0)
id = 0;
if (id < 0) {
dev_err(&pdev->dev, "failed to get alias id, errno %d\n", id);
return NULL;
}
if (WARN_ON(id >= STM32_MAX_PORTS))
return NULL;
@ -702,6 +730,7 @@ static struct stm32_port *stm32_of_get_stm32_port(struct platform_device *pdev)
stm32_ports[id].hw_flow_control = of_property_read_bool(np,
"st,hw-flow-ctrl");
stm32_ports[id].port.line = id;
stm32_ports[id].last_res = RX_BUF_L;
return &stm32_ports[id];
}
@ -711,6 +740,8 @@ static const struct of_device_id stm32_match[] = {
{ .compatible = "st,stm32-uart", .data = &stm32f4_info},
{ .compatible = "st,stm32f7-usart", .data = &stm32f7_info},
{ .compatible = "st,stm32f7-uart", .data = &stm32f7_info},
{ .compatible = "st,stm32h7-usart", .data = &stm32h7_info},
{ .compatible = "st,stm32h7-uart", .data = &stm32h7_info},
{},
};
@ -860,9 +891,15 @@ static int stm32_serial_probe(struct platform_device *pdev)
if (ret)
return ret;
if (stm32port->info->cfg.has_wakeup && stm32port->wakeirq >= 0) {
ret = device_init_wakeup(&pdev->dev, true);
if (ret)
goto err_uninit;
}
ret = uart_add_one_port(&stm32_usart_driver, &stm32port->port);
if (ret)
return ret;
goto err_nowup;
ret = stm32_of_dma_rx_probe(stm32port, pdev);
if (ret)
@ -875,6 +912,15 @@ static int stm32_serial_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, &stm32port->port);
return 0;
err_nowup:
if (stm32port->info->cfg.has_wakeup && stm32port->wakeirq >= 0)
device_init_wakeup(&pdev->dev, false);
err_uninit:
clk_disable_unprepare(stm32port->clk);
return ret;
}
static int stm32_serial_remove(struct platform_device *pdev)
@ -882,6 +928,7 @@ static int stm32_serial_remove(struct platform_device *pdev)
struct uart_port *port = platform_get_drvdata(pdev);
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
struct stm32_usart_config *cfg = &stm32_port->info->cfg;
stm32_clr_bits(port, ofs->cr3, USART_CR3_DMAR);
@ -903,6 +950,9 @@ static int stm32_serial_remove(struct platform_device *pdev)
TX_BUF_L, stm32_port->tx_buf,
stm32_port->tx_dma_buf);
if (cfg->has_wakeup && stm32_port->wakeirq >= 0)
device_init_wakeup(&pdev->dev, false);
clk_disable_unprepare(stm32_port->clk);
return uart_remove_one_port(&stm32_usart_driver, port);
@ -1008,11 +1058,66 @@ static struct uart_driver stm32_usart_driver = {
.cons = STM32_SERIAL_CONSOLE,
};
#ifdef CONFIG_PM_SLEEP
static void stm32_serial_enable_wakeup(struct uart_port *port, bool enable)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
struct stm32_usart_config *cfg = &stm32_port->info->cfg;
u32 val;
if (!cfg->has_wakeup || stm32_port->wakeirq < 0)
return;
if (enable) {
stm32_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
stm32_set_bits(port, ofs->cr1, USART_CR1_UESM);
val = readl_relaxed(port->membase + ofs->cr3);
val &= ~USART_CR3_WUS_MASK;
/* Enable Wake up interrupt from low power on start bit */
val |= USART_CR3_WUS_START_BIT | USART_CR3_WUFIE;
writel_relaxed(val, port->membase + ofs->cr3);
stm32_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
} else {
stm32_clr_bits(port, ofs->cr1, USART_CR1_UESM);
}
}
static int stm32_serial_suspend(struct device *dev)
{
struct uart_port *port = dev_get_drvdata(dev);
uart_suspend_port(&stm32_usart_driver, port);
if (device_may_wakeup(dev))
stm32_serial_enable_wakeup(port, true);
else
stm32_serial_enable_wakeup(port, false);
return 0;
}
static int stm32_serial_resume(struct device *dev)
{
struct uart_port *port = dev_get_drvdata(dev);
if (device_may_wakeup(dev))
stm32_serial_enable_wakeup(port, false);
return uart_resume_port(&stm32_usart_driver, port);
}
#endif /* CONFIG_PM_SLEEP */
static const struct dev_pm_ops stm32_serial_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(stm32_serial_suspend, stm32_serial_resume)
};
static struct platform_driver stm32_serial_driver = {
.probe = stm32_serial_probe,
.remove = stm32_serial_remove,
.driver = {
.name = DRIVER_NAME,
.pm = &stm32_serial_pm_ops,
.of_match_table = of_match_ptr(stm32_match),
},
};

37
drivers/tty/serial/stm32-usart.h
View File

@ -1,5 +1,6 @@
/*
* Copyright (C) Maxime Coquelin 2015
* Copyright (C) STMicroelectronics SA 2017
* Authors: Maxime Coquelin <mcoquelin.stm32@gmail.com>
* Gerald Baeza <gerald_baeza@yahoo.fr>
* License terms: GNU General Public License (GPL), version 2
@ -24,6 +25,8 @@ struct stm32_usart_offsets {
struct stm32_usart_config {
u8 uart_enable_bit; /* USART_CR1_UE */
bool has_7bits_data;
bool has_wakeup;
bool has_fifo;
};
struct stm32_usart_info {
@ -74,6 +77,28 @@ struct stm32_usart_info stm32f7_info = {
}
};
struct stm32_usart_info stm32h7_info = {
.ofs = {
.cr1 = 0x00,
.cr2 = 0x04,
.cr3 = 0x08,
.brr = 0x0c,
.gtpr = 0x10,
.rtor = 0x14,
.rqr = 0x18,
.isr = 0x1c,
.icr = 0x20,
.rdr = 0x24,
.tdr = 0x28,
},
.cfg = {
.uart_enable_bit = 0,
.has_7bits_data = true,
.has_wakeup = true,
.has_fifo = true,
}
};
/* USART_SR (F4) / USART_ISR (F7) */
#define USART_SR_PE BIT(0)
#define USART_SR_FE BIT(1)
@ -93,6 +118,7 @@ struct stm32_usart_info stm32f7_info = {
#define USART_SR_BUSY BIT(16) /* F7 */
#define USART_SR_CMF BIT(17) /* F7 */
#define USART_SR_SBKF BIT(18) /* F7 */
#define USART_SR_WUF BIT(20) /* H7 */
#define USART_SR_TEACK BIT(21) /* F7 */
#define USART_SR_ERR_MASK (USART_SR_LBD | USART_SR_ORE | \
USART_SR_FE | USART_SR_PE)
@ -113,6 +139,7 @@ struct stm32_usart_info stm32f7_info = {
/* USART_CR1 */
#define USART_CR1_SBK BIT(0)
#define USART_CR1_RWU BIT(1) /* F4 */
#define USART_CR1_UESM BIT(1) /* H7 */
#define USART_CR1_RE BIT(2)
#define USART_CR1_TE BIT(3)
#define USART_CR1_IDLEIE BIT(4)
@ -134,6 +161,7 @@ struct stm32_usart_info stm32f7_info = {
#define USART_CR1_EOBIE BIT(27) /* F7 */
#define USART_CR1_M1 BIT(28) /* F7 */
#define USART_CR1_IE_MASK (GENMASK(8, 4) | BIT(14) | BIT(26) | BIT(27))
#define USART_CR1_FIFOEN BIT(29) /* H7 */
/* USART_CR2 */
#define USART_CR2_ADD_MASK GENMASK(3, 0) /* F4 */
@ -175,6 +203,9 @@ struct stm32_usart_info stm32f7_info = {
#define USART_CR3_DEM BIT(14) /* F7 */
#define USART_CR3_DEP BIT(15) /* F7 */
#define USART_CR3_SCARCNT_MASK GENMASK(19, 17) /* F7 */
#define USART_CR3_WUS_MASK GENMASK(21, 20) /* H7 */
#define USART_CR3_WUS_START_BIT BIT(21) /* H7 */
#define USART_CR3_WUFIE BIT(22) /* H7 */
/* USART_GTPR */
#define USART_GTPR_PSC_MASK GENMASK(7, 0)
@ -203,9 +234,10 @@ struct stm32_usart_info stm32f7_info = {
#define USART_ICR_RTOCF BIT(11) /* F7 */
#define USART_ICR_EOBCF BIT(12) /* F7 */
#define USART_ICR_CMCF BIT(17) /* F7 */
#define USART_ICR_WUCF BIT(20) /* H7 */
#define STM32_SERIAL_NAME "ttyS"
#define STM32_MAX_PORTS 6
#define STM32_MAX_PORTS 8
#define RX_BUF_L 200 /* dma rx buffer length */
#define RX_BUF_P RX_BUF_L /* dma rx buffer period */
@ -221,8 +253,11 @@ struct stm32_port {
struct dma_chan *tx_ch; /* dma tx channel */
dma_addr_t tx_dma_buf; /* dma tx buffer bus address */
unsigned char *tx_buf; /* dma tx buffer cpu address */
int last_res;
bool tx_dma_busy; /* dma tx busy */
bool hw_flow_control;
bool fifoen;
int wakeirq;
};
static struct stm32_port stm32_ports[STM32_MAX_PORTS];

2
drivers/tty/serial/sunsab.c
View File

@ -819,7 +819,7 @@ static int sunsab_verify_port(struct uart_port *port, struct serial_struct *ser)
return -EINVAL;
}
static struct uart_ops sunsab_pops = {
static const struct uart_ops sunsab_pops = {
.tx_empty = sunsab_tx_empty,
.set_mctrl = sunsab_set_mctrl,
.get_mctrl = sunsab_get_mctrl,

6
drivers/tty/serial/sunsu.c
View File

@ -958,7 +958,7 @@ sunsu_type(struct uart_port *port)
return uart_config[type].name;
}
static struct uart_ops sunsu_pops = {
static const struct uart_ops sunsu_pops = {
.tx_empty = sunsu_tx_empty,
.set_mctrl = sunsu_set_mctrl,
.get_mctrl = sunsu_get_mctrl,
@ -1212,8 +1212,8 @@ static int sunsu_kbd_ms_init(struct uart_sunsu_port *up)
if (up->port.type == PORT_UNKNOWN)
return -ENODEV;
printk("%s: %s port at %llx, irq %u\n",
up->port.dev->of_node->full_name,
printk("%pOF: %s port at %llx, irq %u\n",
up->port.dev->of_node,
(up->su_type == SU_PORT_KBD) ? "Keyboard" : "Mouse",
(unsigned long long) up->port.mapbase,
up->port.irq);

2
drivers/tty/serial/ucc_uart.c
View File

@ -1085,7 +1085,7 @@ static int qe_uart_verify_port(struct uart_port *port,
*
* Details on these functions can be found in Documentation/serial/driver
*/
static struct uart_ops qe_uart_pops = {
static const struct uart_ops qe_uart_pops = {
.tx_empty = qe_uart_tx_empty,
.set_mctrl = qe_uart_set_mctrl,
.get_mctrl = qe_uart_get_mctrl,

2
drivers/tty/serial/xilinx_uartps.c
View File

@ -1163,7 +1163,7 @@ static void cdns_uart_console_putchar(struct uart_port *port, int ch)
writel(ch, port->membase + CDNS_UART_FIFO);
}
static void __init cdns_early_write(struct console *con, const char *s,
static void cdns_early_write(struct console *con, const char *s,
unsigned n)
{
struct earlycon_device *dev = con->data;

2
drivers/tty/synclink.c
View File

@ -884,7 +884,7 @@ static int synclink_init_one (struct pci_dev *dev,
const struct pci_device_id *ent);
static void synclink_remove_one (struct pci_dev *dev);
static struct pci_device_id synclink_pci_tbl[] = {
static const struct pci_device_id synclink_pci_tbl[] = {
{ PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_USC, PCI_ANY_ID, PCI_ANY_ID, },
{ PCI_VENDOR_ID_MICROGATE, 0x0210, PCI_ANY_ID, PCI_ANY_ID, },
{ 0, }, /* terminate list */

2
drivers/tty/synclink_gt.c
View File

@ -95,7 +95,7 @@ MODULE_LICENSE("GPL");
#define MGSL_MAGIC 0x5401
#define MAX_DEVICES 32
static struct pci_device_id pci_table[] = {
static const struct pci_device_id pci_table[] = {
{PCI_VENDOR_ID_MICROGATE, SYNCLINK_GT_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
{PCI_VENDOR_ID_MICROGATE, SYNCLINK_GT2_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
{PCI_VENDOR_ID_MICROGATE, SYNCLINK_GT4_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},

2
drivers/tty/synclinkmp.c
View File

@ -479,7 +479,7 @@ static char *driver_version = "$Revision: 4.38 $";
static int synclinkmp_init_one(struct pci_dev *dev,const struct pci_device_id *ent);
static void synclinkmp_remove_one(struct pci_dev *dev);
static struct pci_device_id synclinkmp_pci_tbl[] = {
static const struct pci_device_id synclinkmp_pci_tbl[] = {
{ PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_SCA, PCI_ANY_ID, PCI_ANY_ID, },
{ 0, }, /* terminate list */
};

26
drivers/tty/tty_buffer.c
View File

@ -361,6 +361,32 @@ int tty_insert_flip_string_flags(struct tty_port *port,
}
EXPORT_SYMBOL(tty_insert_flip_string_flags);
/**
* __tty_insert_flip_char - Add one character to the tty buffer
* @port: tty port
* @ch: character
* @flag: flag byte
*
* Queue a single byte to the tty buffering, with an optional flag.
* This is the slow path of tty_insert_flip_char.
*/
int __tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag)
{
struct tty_buffer *tb;
int flags = (flag == TTY_NORMAL) ? TTYB_NORMAL : 0;
if (!__tty_buffer_request_room(port, 1, flags))
return 0;
tb = port->buf.tail;
if (~tb->flags & TTYB_NORMAL)
*flag_buf_ptr(tb, tb->used) = flag;
*char_buf_ptr(tb, tb->used++) = ch;
return 1;
}
EXPORT_SYMBOL(__tty_insert_flip_char);
/**
* tty_schedule_flip - push characters to ldisc
* @port: tty port to push from

9
drivers/tty/tty_io.c
View File

@ -462,6 +462,14 @@ static int hung_up_tty_fasync(int fd, struct file *file, int on)
return -ENOTTY;
}
static void tty_show_fdinfo(struct seq_file *m, struct file *file)
{
struct tty_struct *tty = file_tty(file);
if (tty && tty->ops && tty->ops->show_fdinfo)
tty->ops->show_fdinfo(tty, m);
}
static const struct file_operations tty_fops = {
.llseek = no_llseek,
.read = tty_read,
@ -472,6 +480,7 @@ static const struct file_operations tty_fops = {
.open = tty_open,
.release = tty_release,
.fasync = tty_fasync,
.show_fdinfo = tty_show_fdinfo,
};
static const struct file_operations console_fops = {

2
include/linux/mcb.h
View File

@ -136,5 +136,7 @@ extern struct resource *mcb_request_mem(struct mcb_device *dev,
const char *name);
extern void mcb_release_mem(struct resource *mem);
extern int mcb_get_irq(struct mcb_device *dev);
extern struct resource *mcb_get_resource(struct mcb_device *dev,
unsigned int type);
#endif /* _LINUX_MCB_H */

7
include/linux/serial_8250.h
View File

@ -80,9 +80,10 @@ struct uart_8250_ops {
};
struct uart_8250_em485 {
struct timer_list start_tx_timer; /* "rs485 start tx" timer */
struct timer_list stop_tx_timer; /* "rs485 stop tx" timer */
struct timer_list *active_timer; /* pointer to active timer */
struct hrtimer start_tx_timer; /* "rs485 start tx" timer */
struct hrtimer stop_tx_timer; /* "rs485 stop tx" timer */
struct hrtimer *active_timer; /* pointer to active timer */
struct uart_8250_port *port; /* for hrtimer callbacks */
};
/*

10
include/linux/serial_core.h
View File

@ -20,7 +20,7 @@
#ifndef LINUX_SERIAL_CORE_H
#define LINUX_SERIAL_CORE_H
#include <linux/bitops.h>
#include <linux/compiler.h>
#include <linux/interrupt.h>
#include <linux/circ_buf.h>
@ -144,7 +144,7 @@ struct uart_port {
unsigned char x_char; /* xon/xoff char */
unsigned char regshift; /* reg offset shift */
unsigned char iotype; /* io access style */
unsigned char unused1;
unsigned char quirks; /* internal quirks */
#define UPIO_PORT (SERIAL_IO_PORT) /* 8b I/O port access */
#define UPIO_HUB6 (SERIAL_IO_HUB6) /* Hub6 ISA card */
@ -155,6 +155,9 @@ struct uart_port {
#define UPIO_MEM32BE (SERIAL_IO_MEM32BE) /* 32b big endian */
#define UPIO_MEM16 (SERIAL_IO_MEM16) /* 16b little endian */
/* quirks must be updated while holding port mutex */
#define UPQ_NO_TXEN_TEST BIT(0)
unsigned int read_status_mask; /* driver specific */
unsigned int ignore_status_mask; /* driver specific */
struct uart_state *state; /* pointer to parent state */
@ -175,7 +178,6 @@ struct uart_port {
* [for bit definitions in the UPF_CHANGE_MASK]
*
* Bits [0..UPF_LAST_USER] are userspace defined/visible/changeable
* except bit 15 (UPF_NO_TXEN_TEST) which is masked off.
* The remaining bits are serial-core specific and not modifiable by
* userspace.
*/
@ -192,7 +194,6 @@ struct uart_port {
#define UPF_SPD_SHI ((__force upf_t) ASYNC_SPD_SHI /* 12 */ )
#define UPF_LOW_LATENCY ((__force upf_t) ASYNC_LOW_LATENCY /* 13 */ )
#define UPF_BUGGY_UART ((__force upf_t) ASYNC_BUGGY_UART /* 14 */ )
#define UPF_NO_TXEN_TEST ((__force upf_t) (1 << 15))
#define UPF_MAGIC_MULTIPLIER ((__force upf_t) ASYNC_MAGIC_MULTIPLIER /* 16 */ )
#define UPF_NO_THRE_TEST ((__force upf_t) (1 << 19))
@ -246,7 +247,6 @@ struct uart_port {
struct device *dev; /* parent device */
unsigned char hub6; /* this should be in the 8250 driver */
unsigned char suspended;
unsigned char irq_wake;
unsigned char unused[2];
const char *name; /* port name */
struct attribute_group *attr_group; /* port specific attributes */

2
include/linux/tty_driver.h
View File

@ -243,6 +243,7 @@
#include <linux/list.h>
#include <linux/cdev.h>
#include <linux/termios.h>
#include <linux/seq_file.h>
struct tty_struct;
struct tty_driver;
@ -285,6 +286,7 @@ struct tty_operations {
int (*set_termiox)(struct tty_struct *tty, struct termiox *tnew);
int (*get_icount)(struct tty_struct *tty,
struct serial_icounter_struct *icount);
void (*show_fdinfo)(struct tty_struct *tty, struct seq_file *m);
#ifdef CONFIG_CONSOLE_POLL
int (*poll_init)(struct tty_driver *driver, int line, char *options);
int (*poll_get_char)(struct tty_driver *driver, int line);

3
include/linux/tty_flip.h
View File

@ -12,6 +12,7 @@ extern int tty_prepare_flip_string(struct tty_port *port,
unsigned char **chars, size_t size);
extern void tty_flip_buffer_push(struct tty_port *port);
void tty_schedule_flip(struct tty_port *port);
int __tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag);
static inline int tty_insert_flip_char(struct tty_port *port,
unsigned char ch, char flag)
@ -26,7 +27,7 @@ static inline int tty_insert_flip_char(struct tty_port *port,
*char_buf_ptr(tb, tb->used++) = ch;
return 1;
}
return tty_insert_flip_string_flags(port, &ch, &flag, 1);
return __tty_insert_flip_char(port, ch, flag);
}
static inline int tty_insert_flip_string(struct tty_port *port,

14
include/uapi/linux/serial_core.h
View File

@ -56,8 +56,6 @@
#define PORT_ALTR_16550_F128 28 /* Altera 16550 UART with 128 FIFOs */
#define PORT_RT2880 29 /* Ralink RT2880 internal UART */
#define PORT_16550A_FSL64 30 /* Freescale 16550 UART with 64 FIFOs */
#define PORT_DA830 31 /* TI DA8xx/66AK2x */
#define PORT_MAX_8250 31 /* max port ID */
/*
* ARM specific type numbers. These are not currently guaranteed
@ -70,12 +68,17 @@
#define PORT_CLPS711X 33
#define PORT_SA1100 34
#define PORT_UART00 35
#define PORT_OWL 36
#define PORT_21285 37
/* Sparc type numbers. */
#define PORT_SUNZILOG 38
#define PORT_SUNSAB 39
/* Intel EG20 */
#define PORT_PCH_8LINE 44
#define PORT_PCH_2LINE 45
/* DEC */
#define PORT_DZ 46
#define PORT_ZS 47
@ -205,8 +208,8 @@
/* MAX310X */
#define PORT_MAX310X 94
/* High Speed UART for Medfield */
#define PORT_MFD 95
/* TI DA8xx/66AK2x */
#define PORT_DA830 95
/* TI OMAP-UART */
#define PORT_OMAP 96
@ -271,4 +274,7 @@
/* MPS2 UART */
#define PORT_MPS2UART 116
/* MediaTek BTIF */
#define PORT_MTK_BTIF 117
#endif /* _UAPILINUX_SERIAL_CORE_H */