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OpenCloudOS-Kernel/drivers/spi/spi-cadence-xspi.c

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// SPDX-License-Identifier: GPL-2.0+
// Cadence XSPI flash controller driver
// Copyright (C) 2020-21 Cadence
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi-mem.h>
#include <linux/bitfield.h>
#include <linux/limits.h>
#include <linux/log2.h>
#define CDNS_XSPI_MAGIC_NUM_VALUE 0x6522
#define CDNS_XSPI_MAX_BANKS 8
#define CDNS_XSPI_NAME "cadence-xspi"
/*
* Note: below are additional auxiliary registers to
* configure XSPI controller pin-strap settings
*/
/* PHY DQ timing register */
#define CDNS_XSPI_CCP_PHY_DQ_TIMING 0x0000
/* PHY DQS timing register */
#define CDNS_XSPI_CCP_PHY_DQS_TIMING 0x0004
/* PHY gate loopback control register */
#define CDNS_XSPI_CCP_PHY_GATE_LPBCK_CTRL 0x0008
/* PHY DLL slave control register */
#define CDNS_XSPI_CCP_PHY_DLL_SLAVE_CTRL 0x0010
/* DLL PHY control register */
#define CDNS_XSPI_DLL_PHY_CTRL 0x1034
/* Command registers */
#define CDNS_XSPI_CMD_REG_0 0x0000
#define CDNS_XSPI_CMD_REG_1 0x0004
#define CDNS_XSPI_CMD_REG_2 0x0008
#define CDNS_XSPI_CMD_REG_3 0x000C
#define CDNS_XSPI_CMD_REG_4 0x0010
#define CDNS_XSPI_CMD_REG_5 0x0014
/* Command status registers */
#define CDNS_XSPI_CMD_STATUS_REG 0x0044
/* Controller status register */
#define CDNS_XSPI_CTRL_STATUS_REG 0x0100
#define CDNS_XSPI_INIT_COMPLETED BIT(16)
#define CDNS_XSPI_INIT_LEGACY BIT(9)
#define CDNS_XSPI_INIT_FAIL BIT(8)
#define CDNS_XSPI_CTRL_BUSY BIT(7)
/* Controller interrupt status register */
#define CDNS_XSPI_INTR_STATUS_REG 0x0110
#define CDNS_XSPI_STIG_DONE BIT(23)
#define CDNS_XSPI_SDMA_ERROR BIT(22)
#define CDNS_XSPI_SDMA_TRIGGER BIT(21)
#define CDNS_XSPI_CMD_IGNRD_EN BIT(20)
#define CDNS_XSPI_DDMA_TERR_EN BIT(18)
#define CDNS_XSPI_CDMA_TREE_EN BIT(17)
#define CDNS_XSPI_CTRL_IDLE_EN BIT(16)
#define CDNS_XSPI_TRD_COMP_INTR_STATUS 0x0120
#define CDNS_XSPI_TRD_ERR_INTR_STATUS 0x0130
#define CDNS_XSPI_TRD_ERR_INTR_EN 0x0134
/* Controller interrupt enable register */
#define CDNS_XSPI_INTR_ENABLE_REG 0x0114
#define CDNS_XSPI_INTR_EN BIT(31)
#define CDNS_XSPI_STIG_DONE_EN BIT(23)
#define CDNS_XSPI_SDMA_ERROR_EN BIT(22)
#define CDNS_XSPI_SDMA_TRIGGER_EN BIT(21)
#define CDNS_XSPI_INTR_MASK (CDNS_XSPI_INTR_EN | \
CDNS_XSPI_STIG_DONE_EN | \
CDNS_XSPI_SDMA_ERROR_EN | \
CDNS_XSPI_SDMA_TRIGGER_EN)
/* Controller config register */
#define CDNS_XSPI_CTRL_CONFIG_REG 0x0230
#define CDNS_XSPI_CTRL_WORK_MODE GENMASK(6, 5)
#define CDNS_XSPI_WORK_MODE_DIRECT 0
#define CDNS_XSPI_WORK_MODE_STIG 1
#define CDNS_XSPI_WORK_MODE_ACMD 3
/* SDMA trigger transaction registers */
#define CDNS_XSPI_SDMA_SIZE_REG 0x0240
#define CDNS_XSPI_SDMA_TRD_INFO_REG 0x0244
#define CDNS_XSPI_SDMA_DIR BIT(8)
/* Controller features register */
#define CDNS_XSPI_CTRL_FEATURES_REG 0x0F04
#define CDNS_XSPI_NUM_BANKS GENMASK(25, 24)
#define CDNS_XSPI_DMA_DATA_WIDTH BIT(21)
#define CDNS_XSPI_NUM_THREADS GENMASK(3, 0)
/* Controller version register */
#define CDNS_XSPI_CTRL_VERSION_REG 0x0F00
#define CDNS_XSPI_MAGIC_NUM GENMASK(31, 16)
#define CDNS_XSPI_CTRL_REV GENMASK(7, 0)
/* STIG Profile 1.0 instruction fields (split into registers) */
#define CDNS_XSPI_CMD_INSTR_TYPE GENMASK(6, 0)
#define CDNS_XSPI_CMD_P1_R1_ADDR0 GENMASK(31, 24)
#define CDNS_XSPI_CMD_P1_R2_ADDR1 GENMASK(7, 0)
#define CDNS_XSPI_CMD_P1_R2_ADDR2 GENMASK(15, 8)
#define CDNS_XSPI_CMD_P1_R2_ADDR3 GENMASK(23, 16)
#define CDNS_XSPI_CMD_P1_R2_ADDR4 GENMASK(31, 24)
#define CDNS_XSPI_CMD_P1_R3_ADDR5 GENMASK(7, 0)
#define CDNS_XSPI_CMD_P1_R3_CMD GENMASK(23, 16)
#define CDNS_XSPI_CMD_P1_R3_NUM_ADDR_BYTES GENMASK(30, 28)
#define CDNS_XSPI_CMD_P1_R4_ADDR_IOS GENMASK(1, 0)
#define CDNS_XSPI_CMD_P1_R4_CMD_IOS GENMASK(9, 8)
#define CDNS_XSPI_CMD_P1_R4_BANK GENMASK(14, 12)
/* STIG data sequence instruction fields (split into registers) */
#define CDNS_XSPI_CMD_DSEQ_R2_DCNT_L GENMASK(31, 16)
#define CDNS_XSPI_CMD_DSEQ_R3_DCNT_H GENMASK(15, 0)
#define CDNS_XSPI_CMD_DSEQ_R3_NUM_OF_DUMMY GENMASK(25, 20)
#define CDNS_XSPI_CMD_DSEQ_R4_BANK GENMASK(14, 12)
#define CDNS_XSPI_CMD_DSEQ_R4_DATA_IOS GENMASK(9, 8)
#define CDNS_XSPI_CMD_DSEQ_R4_DIR BIT(4)
/* STIG command status fields */
#define CDNS_XSPI_CMD_STATUS_COMPLETED BIT(15)
#define CDNS_XSPI_CMD_STATUS_FAILED BIT(14)
#define CDNS_XSPI_CMD_STATUS_DQS_ERROR BIT(3)
#define CDNS_XSPI_CMD_STATUS_CRC_ERROR BIT(2)
#define CDNS_XSPI_CMD_STATUS_BUS_ERROR BIT(1)
#define CDNS_XSPI_CMD_STATUS_INV_SEQ_ERROR BIT(0)
#define CDNS_XSPI_STIG_DONE_FLAG BIT(0)
#define CDNS_XSPI_TRD_STATUS 0x0104
/* Helper macros for filling command registers */
#define CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_1(op, data_phase) ( \
FIELD_PREP(CDNS_XSPI_CMD_INSTR_TYPE, (data_phase) ? \
CDNS_XSPI_STIG_INSTR_TYPE_1 : CDNS_XSPI_STIG_INSTR_TYPE_0) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R1_ADDR0, (op)->addr.val & 0xff))
#define CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_2(op) ( \
FIELD_PREP(CDNS_XSPI_CMD_P1_R2_ADDR1, ((op)->addr.val >> 8) & 0xFF) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R2_ADDR2, ((op)->addr.val >> 16) & 0xFF) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R2_ADDR3, ((op)->addr.val >> 24) & 0xFF) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R2_ADDR4, ((op)->addr.val >> 32) & 0xFF))
#define CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_3(op) ( \
FIELD_PREP(CDNS_XSPI_CMD_P1_R3_ADDR5, ((op)->addr.val >> 40) & 0xFF) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R3_CMD, (op)->cmd.opcode) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R3_NUM_ADDR_BYTES, (op)->addr.nbytes))
#define CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_4(op, chipsel) ( \
FIELD_PREP(CDNS_XSPI_CMD_P1_R4_ADDR_IOS, ilog2((op)->addr.buswidth)) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R4_CMD_IOS, ilog2((op)->cmd.buswidth)) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R4_BANK, chipsel))
#define CDNS_XSPI_CMD_FLD_DSEQ_CMD_1(op) \
FIELD_PREP(CDNS_XSPI_CMD_INSTR_TYPE, CDNS_XSPI_STIG_INSTR_TYPE_DATA_SEQ)
#define CDNS_XSPI_CMD_FLD_DSEQ_CMD_2(op) \
FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R2_DCNT_L, (op)->data.nbytes & 0xFFFF)
#define CDNS_XSPI_CMD_FLD_DSEQ_CMD_3(op) ( \
FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R3_DCNT_H, \
((op)->data.nbytes >> 16) & 0xffff) | \
FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R3_NUM_OF_DUMMY, (op)->dummy.nbytes * 8))
#define CDNS_XSPI_CMD_FLD_DSEQ_CMD_4(op, chipsel) ( \
FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R4_BANK, chipsel) | \
FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R4_DATA_IOS, \
ilog2((op)->data.buswidth)) | \
FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R4_DIR, \
((op)->data.dir == SPI_MEM_DATA_IN) ? \
CDNS_XSPI_STIG_CMD_DIR_READ : CDNS_XSPI_STIG_CMD_DIR_WRITE))
enum cdns_xspi_stig_instr_type {
CDNS_XSPI_STIG_INSTR_TYPE_0,
CDNS_XSPI_STIG_INSTR_TYPE_1,
CDNS_XSPI_STIG_INSTR_TYPE_DATA_SEQ = 127,
};
enum cdns_xspi_sdma_dir {
CDNS_XSPI_SDMA_DIR_READ,
CDNS_XSPI_SDMA_DIR_WRITE,
};
enum cdns_xspi_stig_cmd_dir {
CDNS_XSPI_STIG_CMD_DIR_READ,
CDNS_XSPI_STIG_CMD_DIR_WRITE,
};
struct cdns_xspi_dev {
struct platform_device *pdev;
struct device *dev;
void __iomem *iobase;
void __iomem *auxbase;
void __iomem *sdmabase;
int irq;
int cur_cs;
unsigned int sdmasize;
struct completion cmd_complete;
struct completion auto_cmd_complete;
struct completion sdma_complete;
bool sdma_error;
void *in_buffer;
const void *out_buffer;
u8 hw_num_banks;
};
static int cdns_xspi_wait_for_controller_idle(struct cdns_xspi_dev *cdns_xspi)
{
u32 ctrl_stat;
return readl_relaxed_poll_timeout(cdns_xspi->iobase +
CDNS_XSPI_CTRL_STATUS_REG,
ctrl_stat,
((ctrl_stat &
CDNS_XSPI_CTRL_BUSY) == 0),
100, 1000);
}
static void cdns_xspi_trigger_command(struct cdns_xspi_dev *cdns_xspi,
u32 cmd_regs[6])
{
writel(cmd_regs[5], cdns_xspi->iobase + CDNS_XSPI_CMD_REG_5);
writel(cmd_regs[4], cdns_xspi->iobase + CDNS_XSPI_CMD_REG_4);
writel(cmd_regs[3], cdns_xspi->iobase + CDNS_XSPI_CMD_REG_3);
writel(cmd_regs[2], cdns_xspi->iobase + CDNS_XSPI_CMD_REG_2);
writel(cmd_regs[1], cdns_xspi->iobase + CDNS_XSPI_CMD_REG_1);
writel(cmd_regs[0], cdns_xspi->iobase + CDNS_XSPI_CMD_REG_0);
}
static int cdns_xspi_check_command_status(struct cdns_xspi_dev *cdns_xspi)
{
int ret = 0;
u32 cmd_status = readl(cdns_xspi->iobase + CDNS_XSPI_CMD_STATUS_REG);
if (cmd_status & CDNS_XSPI_CMD_STATUS_COMPLETED) {
if ((cmd_status & CDNS_XSPI_CMD_STATUS_FAILED) != 0) {
if (cmd_status & CDNS_XSPI_CMD_STATUS_DQS_ERROR) {
dev_err(cdns_xspi->dev,
"Incorrect DQS pulses detected\n");
ret = -EPROTO;
}
if (cmd_status & CDNS_XSPI_CMD_STATUS_CRC_ERROR) {
dev_err(cdns_xspi->dev,
"CRC error received\n");
ret = -EPROTO;
}
if (cmd_status & CDNS_XSPI_CMD_STATUS_BUS_ERROR) {
dev_err(cdns_xspi->dev,
"Error resp on system DMA interface\n");
ret = -EPROTO;
}
if (cmd_status & CDNS_XSPI_CMD_STATUS_INV_SEQ_ERROR) {
dev_err(cdns_xspi->dev,
"Invalid command sequence detected\n");
ret = -EPROTO;
}
}
} else {
dev_err(cdns_xspi->dev, "Fatal err - command not completed\n");
ret = -EPROTO;
}
return ret;
}
static void cdns_xspi_set_interrupts(struct cdns_xspi_dev *cdns_xspi,
bool enabled)
{
u32 intr_enable;
intr_enable = readl(cdns_xspi->iobase + CDNS_XSPI_INTR_ENABLE_REG);
if (enabled)
intr_enable |= CDNS_XSPI_INTR_MASK;
else
intr_enable &= ~CDNS_XSPI_INTR_MASK;
writel(intr_enable, cdns_xspi->iobase + CDNS_XSPI_INTR_ENABLE_REG);
}
static int cdns_xspi_controller_init(struct cdns_xspi_dev *cdns_xspi)
{
u32 ctrl_ver;
u32 ctrl_features;
u16 hw_magic_num;
ctrl_ver = readl(cdns_xspi->iobase + CDNS_XSPI_CTRL_VERSION_REG);
hw_magic_num = FIELD_GET(CDNS_XSPI_MAGIC_NUM, ctrl_ver);
if (hw_magic_num != CDNS_XSPI_MAGIC_NUM_VALUE) {
dev_err(cdns_xspi->dev,
"Incorrect XSPI magic number: %x, expected: %x\n",
hw_magic_num, CDNS_XSPI_MAGIC_NUM_VALUE);
return -EIO;
}
ctrl_features = readl(cdns_xspi->iobase + CDNS_XSPI_CTRL_FEATURES_REG);
cdns_xspi->hw_num_banks = FIELD_GET(CDNS_XSPI_NUM_BANKS, ctrl_features);
cdns_xspi_set_interrupts(cdns_xspi, false);
return 0;
}
static void cdns_xspi_sdma_handle(struct cdns_xspi_dev *cdns_xspi)
{
u32 sdma_size, sdma_trd_info;
u8 sdma_dir;
sdma_size = readl(cdns_xspi->iobase + CDNS_XSPI_SDMA_SIZE_REG);
sdma_trd_info = readl(cdns_xspi->iobase + CDNS_XSPI_SDMA_TRD_INFO_REG);
sdma_dir = FIELD_GET(CDNS_XSPI_SDMA_DIR, sdma_trd_info);
switch (sdma_dir) {
case CDNS_XSPI_SDMA_DIR_READ:
ioread8_rep(cdns_xspi->sdmabase,
cdns_xspi->in_buffer, sdma_size);
break;
case CDNS_XSPI_SDMA_DIR_WRITE:
iowrite8_rep(cdns_xspi->sdmabase,
cdns_xspi->out_buffer, sdma_size);
break;
}
}
static int cdns_xspi_send_stig_command(struct cdns_xspi_dev *cdns_xspi,
const struct spi_mem_op *op,
bool data_phase)
{
u32 cmd_regs[6];
u32 cmd_status;
int ret;
ret = cdns_xspi_wait_for_controller_idle(cdns_xspi);
if (ret < 0)
return -EIO;
writel(FIELD_PREP(CDNS_XSPI_CTRL_WORK_MODE, CDNS_XSPI_WORK_MODE_STIG),
cdns_xspi->iobase + CDNS_XSPI_CTRL_CONFIG_REG);
cdns_xspi_set_interrupts(cdns_xspi, true);
cdns_xspi->sdma_error = false;
memset(cmd_regs, 0, sizeof(cmd_regs));
cmd_regs[1] = CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_1(op, data_phase);
cmd_regs[2] = CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_2(op);
cmd_regs[3] = CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_3(op);
cmd_regs[4] = CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_4(op,
cdns_xspi->cur_cs);
cdns_xspi_trigger_command(cdns_xspi, cmd_regs);
if (data_phase) {
cmd_regs[0] = CDNS_XSPI_STIG_DONE_FLAG;
cmd_regs[1] = CDNS_XSPI_CMD_FLD_DSEQ_CMD_1(op);
cmd_regs[2] = CDNS_XSPI_CMD_FLD_DSEQ_CMD_2(op);
cmd_regs[3] = CDNS_XSPI_CMD_FLD_DSEQ_CMD_3(op);
cmd_regs[4] = CDNS_XSPI_CMD_FLD_DSEQ_CMD_4(op,
cdns_xspi->cur_cs);
cdns_xspi->in_buffer = op->data.buf.in;
cdns_xspi->out_buffer = op->data.buf.out;
cdns_xspi_trigger_command(cdns_xspi, cmd_regs);
wait_for_completion(&cdns_xspi->sdma_complete);
if (cdns_xspi->sdma_error) {
cdns_xspi_set_interrupts(cdns_xspi, false);
return -EIO;
}
cdns_xspi_sdma_handle(cdns_xspi);
}
wait_for_completion(&cdns_xspi->cmd_complete);
cdns_xspi_set_interrupts(cdns_xspi, false);
cmd_status = cdns_xspi_check_command_status(cdns_xspi);
if (cmd_status)
return -EPROTO;
return 0;
}
static int cdns_xspi_mem_op(struct cdns_xspi_dev *cdns_xspi,
struct spi_mem *mem,
const struct spi_mem_op *op)
{
enum spi_mem_data_dir dir = op->data.dir;
if (cdns_xspi->cur_cs != mem->spi->chip_select)
cdns_xspi->cur_cs = mem->spi->chip_select;
return cdns_xspi_send_stig_command(cdns_xspi, op,
(dir != SPI_MEM_NO_DATA));
}
static int cdns_xspi_mem_op_execute(struct spi_mem *mem,
const struct spi_mem_op *op)
{
struct cdns_xspi_dev *cdns_xspi =
spi_master_get_devdata(mem->spi->master);
int ret = 0;
ret = cdns_xspi_mem_op(cdns_xspi, mem, op);
return ret;
}
static int cdns_xspi_adjust_mem_op_size(struct spi_mem *mem, struct spi_mem_op *op)
{
struct cdns_xspi_dev *cdns_xspi =
spi_master_get_devdata(mem->spi->master);
op->data.nbytes = clamp_val(op->data.nbytes, 0, cdns_xspi->sdmasize);
return 0;
}
static const struct spi_controller_mem_ops cadence_xspi_mem_ops = {
.exec_op = cdns_xspi_mem_op_execute,
.adjust_op_size = cdns_xspi_adjust_mem_op_size,
};
static irqreturn_t cdns_xspi_irq_handler(int this_irq, void *dev)
{
struct cdns_xspi_dev *cdns_xspi = dev;
u32 irq_status;
irqreturn_t result = IRQ_NONE;
irq_status = readl(cdns_xspi->iobase + CDNS_XSPI_INTR_STATUS_REG);
writel(irq_status, cdns_xspi->iobase + CDNS_XSPI_INTR_STATUS_REG);
if (irq_status &
(CDNS_XSPI_SDMA_ERROR | CDNS_XSPI_SDMA_TRIGGER |
CDNS_XSPI_STIG_DONE)) {
if (irq_status & CDNS_XSPI_SDMA_ERROR) {
dev_err(cdns_xspi->dev,
"Slave DMA transaction error\n");
cdns_xspi->sdma_error = true;
complete(&cdns_xspi->sdma_complete);
}
if (irq_status & CDNS_XSPI_SDMA_TRIGGER)
complete(&cdns_xspi->sdma_complete);
if (irq_status & CDNS_XSPI_STIG_DONE)
complete(&cdns_xspi->cmd_complete);
result = IRQ_HANDLED;
}
irq_status = readl(cdns_xspi->iobase + CDNS_XSPI_TRD_COMP_INTR_STATUS);
if (irq_status) {
writel(irq_status,
cdns_xspi->iobase + CDNS_XSPI_TRD_COMP_INTR_STATUS);
complete(&cdns_xspi->auto_cmd_complete);
result = IRQ_HANDLED;
}
return result;
}
static int cdns_xspi_of_get_plat_data(struct platform_device *pdev)
{
struct device_node *node_prop = pdev->dev.of_node;
struct device_node *node_child;
unsigned int cs;
for_each_child_of_node(node_prop, node_child) {
if (!of_device_is_available(node_child))
continue;
if (of_property_read_u32(node_child, "reg", &cs)) {
dev_err(&pdev->dev, "Couldn't get memory chip select\n");
of_node_put(node_child);
return -ENXIO;
} else if (cs >= CDNS_XSPI_MAX_BANKS) {
dev_err(&pdev->dev, "reg (cs) parameter value too large\n");
of_node_put(node_child);
return -ENXIO;
}
}
return 0;
}
static void cdns_xspi_print_phy_config(struct cdns_xspi_dev *cdns_xspi)
{
struct device *dev = cdns_xspi->dev;
dev_info(dev, "PHY configuration\n");
dev_info(dev, " * xspi_dll_phy_ctrl: %08x\n",
readl(cdns_xspi->iobase + CDNS_XSPI_DLL_PHY_CTRL));
dev_info(dev, " * phy_dq_timing: %08x\n",
readl(cdns_xspi->auxbase + CDNS_XSPI_CCP_PHY_DQ_TIMING));
dev_info(dev, " * phy_dqs_timing: %08x\n",
readl(cdns_xspi->auxbase + CDNS_XSPI_CCP_PHY_DQS_TIMING));
dev_info(dev, " * phy_gate_loopback_ctrl: %08x\n",
readl(cdns_xspi->auxbase + CDNS_XSPI_CCP_PHY_GATE_LPBCK_CTRL));
dev_info(dev, " * phy_dll_slave_ctrl: %08x\n",
readl(cdns_xspi->auxbase + CDNS_XSPI_CCP_PHY_DLL_SLAVE_CTRL));
}
static int cdns_xspi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct spi_master *master = NULL;
struct cdns_xspi_dev *cdns_xspi = NULL;
struct resource *res;
int ret;
master = devm_spi_alloc_master(dev, sizeof(*cdns_xspi));
if (!master)
return -ENOMEM;
master->mode_bits = SPI_3WIRE | SPI_TX_DUAL | SPI_TX_QUAD |
SPI_RX_DUAL | SPI_RX_QUAD | SPI_TX_OCTAL | SPI_RX_OCTAL |
SPI_MODE_0 | SPI_MODE_3;
master->mem_ops = &cadence_xspi_mem_ops;
master->dev.of_node = pdev->dev.of_node;
master->bus_num = -1;
platform_set_drvdata(pdev, master);
cdns_xspi = spi_master_get_devdata(master);
cdns_xspi->pdev = pdev;
cdns_xspi->dev = &pdev->dev;
cdns_xspi->cur_cs = 0;
init_completion(&cdns_xspi->cmd_complete);
init_completion(&cdns_xspi->auto_cmd_complete);
init_completion(&cdns_xspi->sdma_complete);
ret = cdns_xspi_of_get_plat_data(pdev);
if (ret)
return -ENODEV;
cdns_xspi->iobase = devm_platform_ioremap_resource_byname(pdev, "io");
if (IS_ERR(cdns_xspi->iobase)) {
dev_err(dev, "Failed to remap controller base address\n");
return PTR_ERR(cdns_xspi->iobase);
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sdma");
cdns_xspi->sdmabase = devm_ioremap_resource(dev, res);
if (IS_ERR(cdns_xspi->sdmabase)) {
dev_err(dev, "Failed to remap SDMA address\n");
return PTR_ERR(cdns_xspi->sdmabase);
}
cdns_xspi->sdmasize = resource_size(res);
cdns_xspi->auxbase = devm_platform_ioremap_resource_byname(pdev, "aux");
if (IS_ERR(cdns_xspi->auxbase)) {
dev_err(dev, "Failed to remap AUX address\n");
return PTR_ERR(cdns_xspi->auxbase);
}
cdns_xspi->irq = platform_get_irq(pdev, 0);
if (cdns_xspi->irq < 0)
return -ENXIO;
ret = devm_request_irq(dev, cdns_xspi->irq, cdns_xspi_irq_handler,
IRQF_SHARED, pdev->name, cdns_xspi);
if (ret) {
dev_err(dev, "Failed to request IRQ: %d\n", cdns_xspi->irq);
return ret;
}
cdns_xspi_print_phy_config(cdns_xspi);
ret = cdns_xspi_controller_init(cdns_xspi);
if (ret) {
dev_err(dev, "Failed to initialize controller\n");
return ret;
}
master->num_chipselect = 1 << cdns_xspi->hw_num_banks;
ret = devm_spi_register_master(dev, master);
if (ret) {
dev_err(dev, "Failed to register SPI master\n");
return ret;
}
dev_info(dev, "Successfully registered SPI master\n");
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id cdns_xspi_of_match[] = {
{
.compatible = "cdns,xspi-nor",
},
{ /* end of table */}
};
MODULE_DEVICE_TABLE(of, cdns_xspi_of_match);
#else
#define cdns_xspi_of_match NULL
#endif /* CONFIG_OF */
static struct platform_driver cdns_xspi_platform_driver = {
.probe = cdns_xspi_probe,
.remove = NULL,
.driver = {
.name = CDNS_XSPI_NAME,
.of_match_table = cdns_xspi_of_match,
},
};
module_platform_driver(cdns_xspi_platform_driver);
MODULE_DESCRIPTION("Cadence XSPI Controller Driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" CDNS_XSPI_NAME);
MODULE_AUTHOR("Konrad Kociolek <konrad@cadence.com>");
MODULE_AUTHOR("Jayshri Pawar <jpawar@cadence.com>");
MODULE_AUTHOR("Parshuram Thombare <pthombar@cadence.com>");
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