/*
* Analog Devices SPI3 controller driver
*
- * Copyright (c) 2013 Analog Devices Inc.
+ * Copyright (c) 2014 Analog Devices Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
+#include <linux/spi/adi_spi3.h>
#include <linux/types.h>
-#include <asm/bfin_spi3.h>
-#include <asm/cacheflush.h>
#include <asm/dma.h>
#include <asm/portmux.h>
-enum bfin_spi_state {
+enum adi_spi_state {
START_STATE,
RUNNING_STATE,
DONE_STATE,
ERROR_STATE
};
-struct bfin_spi_master;
+struct adi_spi_master;
-struct bfin_spi_transfer_ops {
- void (*write) (struct bfin_spi_master *);
- void (*read) (struct bfin_spi_master *);
- void (*duplex) (struct bfin_spi_master *);
+struct adi_spi_transfer_ops {
+ void (*write) (struct adi_spi_master *);
+ void (*read) (struct adi_spi_master *);
+ void (*duplex) (struct adi_spi_master *);
};
/* runtime info for spi master */
-struct bfin_spi_master {
+struct adi_spi_master {
/* SPI framework hookup */
struct spi_master *master;
/* Regs base of SPI controller */
- struct bfin_spi_regs __iomem *regs;
+ struct adi_spi_regs __iomem *regs;
/* Pin request list */
u16 *pin_req;
/* Current message transfer state info */
struct spi_message *cur_msg;
struct spi_transfer *cur_transfer;
- struct bfin_spi_device *cur_chip;
+ struct adi_spi_device *cur_chip;
unsigned transfer_len;
/* transfer buffer */
u32 ssel;
unsigned long sclk;
- enum bfin_spi_state state;
+ enum adi_spi_state state;
- const struct bfin_spi_transfer_ops *ops;
+ const struct adi_spi_transfer_ops *ops;
};
-struct bfin_spi_device {
+struct adi_spi_device {
u32 control;
u32 clock;
u32 ssel;
u32 cs_gpio;
u32 tx_dummy_val; /* tx value for rx only transfer */
bool enable_dma;
- const struct bfin_spi_transfer_ops *ops;
+ const struct adi_spi_transfer_ops *ops;
};
-static void bfin_spi_enable(struct bfin_spi_master *drv_data)
+static void adi_spi_enable(struct adi_spi_master *drv_data)
{
- bfin_write_or(&drv_data->regs->control, SPI_CTL_EN);
+ u32 ctl;
+
+ ctl = ioread32(&drv_data->regs->control);
+ ctl |= SPI_CTL_EN;
+ iowrite32(ctl, &drv_data->regs->control);
}
-static void bfin_spi_disable(struct bfin_spi_master *drv_data)
+static void adi_spi_disable(struct adi_spi_master *drv_data)
{
- bfin_write_and(&drv_data->regs->control, ~SPI_CTL_EN);
+ u32 ctl;
+
+ ctl = ioread32(&drv_data->regs->control);
+ ctl &= ~SPI_CTL_EN;
+ iowrite32(ctl, &drv_data->regs->control);
}
/* Caculate the SPI_CLOCK register value based on input HZ */
return spi_clock;
}
-static int bfin_spi_flush(struct bfin_spi_master *drv_data)
+static int adi_spi_flush(struct adi_spi_master *drv_data)
{
unsigned long limit = loops_per_jiffy << 1;
/* wait for stop and clear stat */
- while (!(bfin_read(&drv_data->regs->status) & SPI_STAT_SPIF) && --limit)
+ while (!(ioread32(&drv_data->regs->status) & SPI_STAT_SPIF) && --limit)
cpu_relax();
- bfin_write(&drv_data->regs->status, 0xFFFFFFFF);
+ iowrite32(0xFFFFFFFF, &drv_data->regs->status);
return limit;
}
/* Chip select operation functions for cs_change flag */
-static void bfin_spi_cs_active(struct bfin_spi_master *drv_data, struct bfin_spi_device *chip)
+static void adi_spi_cs_active(struct adi_spi_master *drv_data, struct adi_spi_device *chip)
{
- if (likely(chip->cs < MAX_CTRL_CS))
- bfin_write_and(&drv_data->regs->ssel, ~chip->ssel);
- else
+ if (likely(chip->cs < MAX_CTRL_CS)) {
+ u32 reg;
+ reg = ioread32(&drv_data->regs->ssel);
+ reg &= ~chip->ssel;
+ iowrite32(reg, &drv_data->regs->ssel);
+ } else {
gpio_set_value(chip->cs_gpio, 0);
+ }
}
-static void bfin_spi_cs_deactive(struct bfin_spi_master *drv_data,
- struct bfin_spi_device *chip)
+static void adi_spi_cs_deactive(struct adi_spi_master *drv_data,
+ struct adi_spi_device *chip)
{
- if (likely(chip->cs < MAX_CTRL_CS))
- bfin_write_or(&drv_data->regs->ssel, chip->ssel);
- else
+ if (likely(chip->cs < MAX_CTRL_CS)) {
+ u32 reg;
+ reg = ioread32(&drv_data->regs->ssel);
+ reg |= chip->ssel;
+ iowrite32(reg, &drv_data->regs->ssel);
+ } else {
gpio_set_value(chip->cs_gpio, 1);
+ }
/* Move delay here for consistency */
if (chip->cs_chg_udelay)
}
/* enable or disable the pin muxed by GPIO and SPI CS to work as SPI CS */
-static inline void bfin_spi_cs_enable(struct bfin_spi_master *drv_data,
- struct bfin_spi_device *chip)
+static inline void adi_spi_cs_enable(struct adi_spi_master *drv_data,
+ struct adi_spi_device *chip)
{
- if (chip->cs < MAX_CTRL_CS)
- bfin_write_or(&drv_data->regs->ssel, chip->ssel >> 8);
+ if (chip->cs < MAX_CTRL_CS) {
+ u32 reg;
+ reg = ioread32(&drv_data->regs->ssel);
+ reg |= chip->ssel >> 8;
+ iowrite32(reg, &drv_data->regs->ssel);
+ }
}
-static inline void bfin_spi_cs_disable(struct bfin_spi_master *drv_data,
- struct bfin_spi_device *chip)
+static inline void adi_spi_cs_disable(struct adi_spi_master *drv_data,
+ struct adi_spi_device *chip)
{
- if (chip->cs < MAX_CTRL_CS)
- bfin_write_and(&drv_data->regs->ssel, ~(chip->ssel >> 8));
+ if (chip->cs < MAX_CTRL_CS) {
+ u32 reg;
+ reg = ioread32(&drv_data->regs->ssel);
+ reg &= ~(chip->ssel >> 8);
+ iowrite32(reg, &drv_data->regs->ssel);
+ }
}
/* stop controller and re-config current chip*/
-static void bfin_spi_restore_state(struct bfin_spi_master *drv_data)
+static void adi_spi_restore_state(struct adi_spi_master *drv_data)
{
- struct bfin_spi_device *chip = drv_data->cur_chip;
+ struct adi_spi_device *chip = drv_data->cur_chip;
/* Clear status and disable clock */
- bfin_write(&drv_data->regs->status, 0xFFFFFFFF);
- bfin_write(&drv_data->regs->rx_control, 0x0);
- bfin_write(&drv_data->regs->tx_control, 0x0);
- bfin_spi_disable(drv_data);
-
- SSYNC();
+ iowrite32(0xFFFFFFFF, &drv_data->regs->status);
+ iowrite32(0x0, &drv_data->regs->rx_control);
+ iowrite32(0x0, &drv_data->regs->tx_control);
+ adi_spi_disable(drv_data);
/* Load the registers */
- bfin_write(&drv_data->regs->control, chip->control);
- bfin_write(&drv_data->regs->clock, chip->clock);
+ iowrite32(chip->control, &drv_data->regs->control);
+ iowrite32(chip->clock, &drv_data->regs->clock);
- bfin_spi_enable(drv_data);
+ adi_spi_enable(drv_data);
drv_data->tx_num = drv_data->rx_num = 0;
/* we always choose tx transfer initiate */
- bfin_write(&drv_data->regs->rx_control, SPI_RXCTL_REN);
- bfin_write(&drv_data->regs->tx_control,
- SPI_TXCTL_TEN | SPI_TXCTL_TTI);
- bfin_spi_cs_active(drv_data, chip);
+ iowrite32(SPI_RXCTL_REN, &drv_data->regs->rx_control);
+ iowrite32(SPI_TXCTL_TEN | SPI_TXCTL_TTI, &drv_data->regs->tx_control);
+ adi_spi_cs_active(drv_data, chip);
}
/* discard invalid rx data and empty rfifo */
-static inline void dummy_read(struct bfin_spi_master *drv_data)
+static inline void dummy_read(struct adi_spi_master *drv_data)
{
- while (!(bfin_read(&drv_data->regs->status) & SPI_STAT_RFE))
- bfin_read(&drv_data->regs->rfifo);
+ while (!(ioread32(&drv_data->regs->status) & SPI_STAT_RFE))
+ ioread32(&drv_data->regs->rfifo);
}
-static void bfin_spi_u8_write(struct bfin_spi_master *drv_data)
+static void adi_spi_u8_write(struct adi_spi_master *drv_data)
{
dummy_read(drv_data);
while (drv_data->tx < drv_data->tx_end) {
- bfin_write(&drv_data->regs->tfifo, (*(u8 *)(drv_data->tx++)));
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
+ iowrite32(*(u8 *)(drv_data->tx++), &drv_data->regs->tfifo);
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
cpu_relax();
- bfin_read(&drv_data->regs->rfifo);
+ ioread32(&drv_data->regs->rfifo);
}
}
-static void bfin_spi_u8_read(struct bfin_spi_master *drv_data)
+static void adi_spi_u8_read(struct adi_spi_master *drv_data)
{
u32 tx_val = drv_data->cur_chip->tx_dummy_val;
dummy_read(drv_data);
while (drv_data->rx < drv_data->rx_end) {
- bfin_write(&drv_data->regs->tfifo, tx_val);
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
+ iowrite32(tx_val, &drv_data->regs->tfifo);
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
cpu_relax();
- *(u8 *)(drv_data->rx++) = bfin_read(&drv_data->regs->rfifo);
+ *(u8 *)(drv_data->rx++) = ioread32(&drv_data->regs->rfifo);
}
}
-static void bfin_spi_u8_duplex(struct bfin_spi_master *drv_data)
+static void adi_spi_u8_duplex(struct adi_spi_master *drv_data)
{
dummy_read(drv_data);
while (drv_data->rx < drv_data->rx_end) {
- bfin_write(&drv_data->regs->tfifo, (*(u8 *)(drv_data->tx++)));
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
+ iowrite32(*(u8 *)(drv_data->tx++), &drv_data->regs->tfifo);
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
cpu_relax();
- *(u8 *)(drv_data->rx++) = bfin_read(&drv_data->regs->rfifo);
+ *(u8 *)(drv_data->rx++) = ioread32(&drv_data->regs->rfifo);
}
}
-static const struct bfin_spi_transfer_ops bfin_bfin_spi_transfer_ops_u8 = {
- .write = bfin_spi_u8_write,
- .read = bfin_spi_u8_read,
- .duplex = bfin_spi_u8_duplex,
+static const struct adi_spi_transfer_ops adi_spi_transfer_ops_u8 = {
+ .write = adi_spi_u8_write,
+ .read = adi_spi_u8_read,
+ .duplex = adi_spi_u8_duplex,
};
-static void bfin_spi_u16_write(struct bfin_spi_master *drv_data)
+static void adi_spi_u16_write(struct adi_spi_master *drv_data)
{
dummy_read(drv_data);
while (drv_data->tx < drv_data->tx_end) {
- bfin_write(&drv_data->regs->tfifo, (*(u16 *)drv_data->tx));
+ iowrite32(*(u16 *)drv_data->tx, &drv_data->regs->tfifo);
drv_data->tx += 2;
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
cpu_relax();
- bfin_read(&drv_data->regs->rfifo);
+ ioread32(&drv_data->regs->rfifo);
}
}
-static void bfin_spi_u16_read(struct bfin_spi_master *drv_data)
+static void adi_spi_u16_read(struct adi_spi_master *drv_data)
{
u32 tx_val = drv_data->cur_chip->tx_dummy_val;
dummy_read(drv_data);
while (drv_data->rx < drv_data->rx_end) {
- bfin_write(&drv_data->regs->tfifo, tx_val);
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
+ iowrite32(tx_val, &drv_data->regs->tfifo);
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
cpu_relax();
- *(u16 *)drv_data->rx = bfin_read(&drv_data->regs->rfifo);
+ *(u16 *)drv_data->rx = ioread32(&drv_data->regs->rfifo);
drv_data->rx += 2;
}
}
-static void bfin_spi_u16_duplex(struct bfin_spi_master *drv_data)
+static void adi_spi_u16_duplex(struct adi_spi_master *drv_data)
{
dummy_read(drv_data);
while (drv_data->rx < drv_data->rx_end) {
- bfin_write(&drv_data->regs->tfifo, (*(u16 *)drv_data->tx));
+ iowrite32(*(u16 *)drv_data->tx, &drv_data->regs->tfifo);
drv_data->tx += 2;
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
cpu_relax();
- *(u16 *)drv_data->rx = bfin_read(&drv_data->regs->rfifo);
+ *(u16 *)drv_data->rx = ioread32(&drv_data->regs->rfifo);
drv_data->rx += 2;
}
}
-static const struct bfin_spi_transfer_ops bfin_bfin_spi_transfer_ops_u16 = {
- .write = bfin_spi_u16_write,
- .read = bfin_spi_u16_read,
- .duplex = bfin_spi_u16_duplex,
+static const struct adi_spi_transfer_ops adi_spi_transfer_ops_u16 = {
+ .write = adi_spi_u16_write,
+ .read = adi_spi_u16_read,
+ .duplex = adi_spi_u16_duplex,
};
-static void bfin_spi_u32_write(struct bfin_spi_master *drv_data)
+static void adi_spi_u32_write(struct adi_spi_master *drv_data)
{
dummy_read(drv_data);
while (drv_data->tx < drv_data->tx_end) {
- bfin_write(&drv_data->regs->tfifo, (*(u32 *)drv_data->tx));
+ iowrite32(*(u32 *)drv_data->tx, &drv_data->regs->tfifo);
drv_data->tx += 4;
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
cpu_relax();
- bfin_read(&drv_data->regs->rfifo);
+ ioread32(&drv_data->regs->rfifo);
}
}
-static void bfin_spi_u32_read(struct bfin_spi_master *drv_data)
+static void adi_spi_u32_read(struct adi_spi_master *drv_data)
{
u32 tx_val = drv_data->cur_chip->tx_dummy_val;
dummy_read(drv_data);
while (drv_data->rx < drv_data->rx_end) {
- bfin_write(&drv_data->regs->tfifo, tx_val);
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
+ iowrite32(tx_val, &drv_data->regs->tfifo);
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
cpu_relax();
- *(u32 *)drv_data->rx = bfin_read(&drv_data->regs->rfifo);
+ *(u32 *)drv_data->rx = ioread32(&drv_data->regs->rfifo);
drv_data->rx += 4;
}
}
-static void bfin_spi_u32_duplex(struct bfin_spi_master *drv_data)
+static void adi_spi_u32_duplex(struct adi_spi_master *drv_data)
{
dummy_read(drv_data);
while (drv_data->rx < drv_data->rx_end) {
- bfin_write(&drv_data->regs->tfifo, (*(u32 *)drv_data->tx));
+ iowrite32(*(u32 *)drv_data->tx, &drv_data->regs->tfifo);
drv_data->tx += 4;
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
cpu_relax();
- *(u32 *)drv_data->rx = bfin_read(&drv_data->regs->rfifo);
+ *(u32 *)drv_data->rx = ioread32(&drv_data->regs->rfifo);
drv_data->rx += 4;
}
}
-static const struct bfin_spi_transfer_ops bfin_bfin_spi_transfer_ops_u32 = {
- .write = bfin_spi_u32_write,
- .read = bfin_spi_u32_read,
- .duplex = bfin_spi_u32_duplex,
+static const struct adi_spi_transfer_ops adi_spi_transfer_ops_u32 = {
+ .write = adi_spi_u32_write,
+ .read = adi_spi_u32_read,
+ .duplex = adi_spi_u32_duplex,
};
/* test if there is more transfer to be done */
-static void bfin_spi_next_transfer(struct bfin_spi_master *drv)
+static void adi_spi_next_transfer(struct adi_spi_master *drv)
{
struct spi_message *msg = drv->cur_msg;
struct spi_transfer *t = drv->cur_transfer;
}
}
-static void bfin_spi_giveback(struct bfin_spi_master *drv_data)
+static void adi_spi_giveback(struct adi_spi_master *drv_data)
{
- struct bfin_spi_device *chip = drv_data->cur_chip;
+ struct adi_spi_device *chip = drv_data->cur_chip;
- bfin_spi_cs_deactive(drv_data, chip);
+ adi_spi_cs_deactive(drv_data, chip);
spi_finalize_current_message(drv_data->master);
}
-static int bfin_spi_setup_transfer(struct bfin_spi_master *drv)
+static int adi_spi_setup_transfer(struct adi_spi_master *drv)
{
struct spi_transfer *t = drv->cur_transfer;
u32 cr, cr_width;
switch (t->bits_per_word) {
case 8:
cr_width = SPI_CTL_SIZE08;
- drv->ops = &bfin_bfin_spi_transfer_ops_u8;
+ drv->ops = &adi_spi_transfer_ops_u8;
break;
case 16:
cr_width = SPI_CTL_SIZE16;
- drv->ops = &bfin_bfin_spi_transfer_ops_u16;
+ drv->ops = &adi_spi_transfer_ops_u16;
break;
case 32:
cr_width = SPI_CTL_SIZE32;
- drv->ops = &bfin_bfin_spi_transfer_ops_u32;
+ drv->ops = &adi_spi_transfer_ops_u32;
break;
default:
return -EINVAL;
}
- cr = bfin_read(&drv->regs->control) & ~SPI_CTL_SIZE;
+ cr = ioread32(&drv->regs->control) & ~SPI_CTL_SIZE;
cr |= cr_width;
- bfin_write(&drv->regs->control, cr);
+ iowrite32(cr, &drv->regs->control);
/* speed setup */
- bfin_write(&drv->regs->clock,
- hz_to_spi_clock(drv->sclk, t->speed_hz));
+ iowrite32(hz_to_spi_clock(drv->sclk, t->speed_hz), &drv->regs->clock);
return 0;
}
-static int bfin_spi_dma_xfer(struct bfin_spi_master *drv_data)
+static int adi_spi_dma_xfer(struct adi_spi_master *drv_data)
{
struct spi_transfer *t = drv_data->cur_transfer;
struct spi_message *msg = drv_data->cur_msg;
- struct bfin_spi_device *chip = drv_data->cur_chip;
+ struct adi_spi_device *chip = drv_data->cur_chip;
u32 dma_config;
unsigned long word_count, word_size;
void *tx_buf, *rx_buf;
set_dma_config(drv_data->rx_dma, dma_config | WNR);
enable_dma(drv_data->tx_dma);
enable_dma(drv_data->rx_dma);
- SSYNC();
- bfin_write(&drv_data->regs->rx_control, SPI_RXCTL_REN | SPI_RXCTL_RDR_NE);
- SSYNC();
- bfin_write(&drv_data->regs->tx_control,
- SPI_TXCTL_TEN | SPI_TXCTL_TTI | SPI_TXCTL_TDR_NF);
+ iowrite32(SPI_RXCTL_REN | SPI_RXCTL_RDR_NE,
+ &drv_data->regs->rx_control);
+ iowrite32(SPI_TXCTL_TEN | SPI_TXCTL_TTI | SPI_TXCTL_TDR_NF,
+ &drv_data->regs->tx_control);
return 0;
}
-static int bfin_spi_pio_xfer(struct bfin_spi_master *drv_data)
+static int adi_spi_pio_xfer(struct adi_spi_master *drv_data)
{
struct spi_message *msg = drv_data->cur_msg;
return -EIO;
}
- if (!bfin_spi_flush(drv_data))
+ if (!adi_spi_flush(drv_data))
return -EIO;
msg->actual_length += drv_data->transfer_len;
tasklet_schedule(&drv_data->pump_transfers);
return 0;
}
-static void bfin_spi_pump_transfers(unsigned long data)
+static void adi_spi_pump_transfers(unsigned long data)
{
- struct bfin_spi_master *drv_data = (struct bfin_spi_master *)data;
+ struct adi_spi_master *drv_data = (struct adi_spi_master *)data;
struct spi_message *msg = NULL;
struct spi_transfer *t = NULL;
- struct bfin_spi_device *chip = NULL;
+ struct adi_spi_device *chip = NULL;
int ret;
/* Get current state information */
/* Handle for abort */
if (drv_data->state == ERROR_STATE) {
msg->status = -EIO;
- bfin_spi_giveback(drv_data);
+ adi_spi_giveback(drv_data);
return;
}
if (t->delay_usecs)
udelay(t->delay_usecs);
if (t->cs_change)
- bfin_spi_cs_deactive(drv_data, chip);
- bfin_spi_next_transfer(drv_data);
+ adi_spi_cs_deactive(drv_data, chip);
+ adi_spi_next_transfer(drv_data);
t = drv_data->cur_transfer;
}
/* Handle end of message */
if (drv_data->state == DONE_STATE) {
msg->status = 0;
- bfin_spi_giveback(drv_data);
+ adi_spi_giveback(drv_data);
return;
}
return;
}
- ret = bfin_spi_setup_transfer(drv_data);
+ ret = adi_spi_setup_transfer(drv_data);
if (ret) {
msg->status = ret;
- bfin_spi_giveback(drv_data);
+ adi_spi_giveback(drv_data);
}
- bfin_write(&drv_data->regs->status, 0xFFFFFFFF);
- bfin_spi_cs_active(drv_data, chip);
+ iowrite32(0xFFFFFFFF, &drv_data->regs->status);
+ adi_spi_cs_active(drv_data, chip);
drv_data->state = RUNNING_STATE;
if (chip->enable_dma)
- ret = bfin_spi_dma_xfer(drv_data);
+ ret = adi_spi_dma_xfer(drv_data);
else
- ret = bfin_spi_pio_xfer(drv_data);
+ ret = adi_spi_pio_xfer(drv_data);
if (ret) {
msg->status = ret;
- bfin_spi_giveback(drv_data);
+ adi_spi_giveback(drv_data);
}
}
-static int bfin_spi_transfer_one_message(struct spi_master *master,
+static int adi_spi_transfer_one_message(struct spi_master *master,
struct spi_message *m)
{
- struct bfin_spi_master *drv_data = spi_master_get_devdata(master);
+ struct adi_spi_master *drv_data = spi_master_get_devdata(master);
drv_data->cur_msg = m;
drv_data->cur_chip = spi_get_ctldata(drv_data->cur_msg->spi);
- bfin_spi_restore_state(drv_data);
+ adi_spi_restore_state(drv_data);
drv_data->state = START_STATE;
drv_data->cur_transfer = list_entry(drv_data->cur_msg->transfers.next,
P_SPI2_SSEL6, P_SPI2_SSEL7},
};
-static int bfin_spi_setup(struct spi_device *spi)
+static int adi_spi_setup(struct spi_device *spi)
{
- struct bfin_spi_master *drv_data = spi_master_get_devdata(spi->master);
- struct bfin_spi_device *chip = spi_get_ctldata(spi);
- u32 bfin_ctl_reg = SPI_CTL_ODM | SPI_CTL_PSSE;
+ struct adi_spi_master *drv_data = spi_master_get_devdata(spi->master);
+ struct adi_spi_device *chip = spi_get_ctldata(spi);
+ u32 ctl_reg = SPI_CTL_ODM | SPI_CTL_PSSE;
int ret = -EINVAL;
if (!chip) {
- struct bfin_spi3_chip *chip_info = spi->controller_data;
+ struct adi_spi3_chip *chip_info = spi->controller_data;
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (!chip) {
return -ENOMEM;
}
if (chip_info) {
- if (chip_info->control & ~bfin_ctl_reg) {
+ if (chip_info->control & ~ctl_reg) {
dev_err(&spi->dev,
"do not set bits that the SPI framework manages\n");
goto error;
chip->enable_dma = chip_info->enable_dma;
}
chip->cs = spi->chip_select;
+
if (chip->cs < MAX_CTRL_CS) {
chip->ssel = (1 << chip->cs) << 8;
ret = peripheral_request(ssel[spi->master->bus_num]
}
/* force a default base state */
- chip->control &= bfin_ctl_reg;
+ chip->control &= ctl_reg;
if (spi->mode & SPI_CPOL)
chip->control |= SPI_CTL_CPOL;
chip->clock = hz_to_spi_clock(drv_data->sclk, spi->max_speed_hz);
- bfin_spi_cs_enable(drv_data, chip);
- bfin_spi_cs_deactive(drv_data, chip);
+ adi_spi_cs_enable(drv_data, chip);
+ adi_spi_cs_deactive(drv_data, chip);
return 0;
error:
return ret;
}
-static void bfin_spi_cleanup(struct spi_device *spi)
+static void adi_spi_cleanup(struct spi_device *spi)
{
- struct bfin_spi_device *chip = spi_get_ctldata(spi);
- struct bfin_spi_master *drv_data = spi_master_get_devdata(spi->master);
+ struct adi_spi_device *chip = spi_get_ctldata(spi);
+ struct adi_spi_master *drv_data = spi_master_get_devdata(spi->master);
if (!chip)
return;
if (chip->cs < MAX_CTRL_CS) {
peripheral_free(ssel[spi->master->bus_num]
[chip->cs-1]);
- bfin_spi_cs_disable(drv_data, chip);
+ adi_spi_cs_disable(drv_data, chip);
} else {
gpio_free(chip->cs_gpio);
}
spi_set_ctldata(spi, NULL);
}
-static irqreturn_t bfin_spi_tx_dma_isr(int irq, void *dev_id)
+static irqreturn_t adi_spi_tx_dma_isr(int irq, void *dev_id)
{
- struct bfin_spi_master *drv_data = dev_id;
+ struct adi_spi_master *drv_data = dev_id;
u32 dma_stat = get_dma_curr_irqstat(drv_data->tx_dma);
+ u32 tx_ctl;
clear_dma_irqstat(drv_data->tx_dma);
if (dma_stat & DMA_DONE) {
if (drv_data->tx)
drv_data->state = ERROR_STATE;
}
- bfin_write_and(&drv_data->regs->tx_control, ~SPI_TXCTL_TDR_NF);
+ tx_ctl = ioread32(&drv_data->regs->tx_control);
+ tx_ctl &= ~SPI_TXCTL_TDR_NF;
+ iowrite32(tx_ctl, &drv_data->regs->tx_control);
return IRQ_HANDLED;
}
-static irqreturn_t bfin_spi_rx_dma_isr(int irq, void *dev_id)
+static irqreturn_t adi_spi_rx_dma_isr(int irq, void *dev_id)
{
- struct bfin_spi_master *drv_data = dev_id;
+ struct adi_spi_master *drv_data = dev_id;
struct spi_message *msg = drv_data->cur_msg;
u32 dma_stat = get_dma_curr_irqstat(drv_data->rx_dma);
dev_err(&drv_data->master->dev,
"spi rx dma error: %d\n", dma_stat);
}
- bfin_write(&drv_data->regs->tx_control, 0);
- bfin_write(&drv_data->regs->rx_control, 0);
+ iowrite32(0, &drv_data->regs->tx_control);
+ iowrite32(0, &drv_data->regs->rx_control);
if (drv_data->rx_num != drv_data->tx_num)
dev_dbg(&drv_data->master->dev,
"dma interrupt missing: tx=%d,rx=%d\n",
return IRQ_HANDLED;
}
-static int bfin_spi_probe(struct platform_device *pdev)
+static int adi_spi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct bfin_spi3_master *info = dev_get_platdata(dev);
+ struct adi_spi3_master *info = dev_get_platdata(dev);
struct spi_master *master;
- struct bfin_spi_master *drv_data;
+ struct adi_spi_master *drv_data;
struct resource *mem, *res;
unsigned int tx_dma, rx_dma;
unsigned long sclk;
master->bus_num = pdev->id;
master->num_chipselect = info->num_chipselect;
- master->cleanup = bfin_spi_cleanup;
- master->setup = bfin_spi_setup;
- master->transfer_one_message = bfin_spi_transfer_one_message;
+ master->cleanup = adi_spi_cleanup;
+ master->setup = adi_spi_setup;
+ master->transfer_one_message = adi_spi_transfer_one_message;
master->bits_per_word_mask = SPI_BPW_MASK(32) | SPI_BPW_MASK(16) |
SPI_BPW_MASK(8);
dev_err(dev, "can not request SPI TX DMA channel\n");
goto err_put_master;
}
- set_dma_callback(tx_dma, bfin_spi_tx_dma_isr, drv_data);
+ set_dma_callback(tx_dma, adi_spi_tx_dma_isr, drv_data);
ret = request_dma(rx_dma, "SPI_RX_DMA");
if (ret) {
dev_err(dev, "can not request SPI RX DMA channel\n");
goto err_free_tx_dma;
}
- set_dma_callback(drv_data->rx_dma, bfin_spi_rx_dma_isr, drv_data);
+ set_dma_callback(drv_data->rx_dma, adi_spi_rx_dma_isr, drv_data);
/* request CLK, MOSI and MISO */
- ret = peripheral_request_list(drv_data->pin_req, "bfin-spi3");
+ ret = peripheral_request_list(drv_data->pin_req, "adi-spi3");
if (ret < 0) {
dev_err(dev, "can not request spi pins\n");
goto err_free_rx_dma;
}
- bfin_write(&drv_data->regs->control, SPI_CTL_MSTR | SPI_CTL_CPHA);
- bfin_write(&drv_data->regs->ssel, 0x0000FE00);
- bfin_write(&drv_data->regs->delay, 0x0);
+ iowrite32(SPI_CTL_MSTR | SPI_CTL_CPHA, &drv_data->regs->control);
+ iowrite32(0x0000FE00, &drv_data->regs->ssel);
+ iowrite32(0x0, &drv_data->regs->delay);
tasklet_init(&drv_data->pump_transfers,
- bfin_spi_pump_transfers, (unsigned long)drv_data);
+ adi_spi_pump_transfers, (unsigned long)drv_data);
/* register with the SPI framework */
ret = devm_spi_register_master(dev, master);
if (ret) {
return ret;
}
-static int bfin_spi_remove(struct platform_device *pdev)
+static int adi_spi_remove(struct platform_device *pdev)
{
struct spi_master *master = platform_get_drvdata(pdev);
- struct bfin_spi_master *drv_data = spi_master_get_devdata(master);
-
- bfin_spi_disable(drv_data);
+ struct adi_spi_master *drv_data = spi_master_get_devdata(master);
+ adi_spi_disable(drv_data);
peripheral_free_list(drv_data->pin_req);
free_dma(drv_data->rx_dma);
free_dma(drv_data->tx_dma);
-
return 0;
}
#ifdef CONFIG_PM
-static int bfin_spi_suspend(struct device *dev)
+static int adi_spi_suspend(struct device *dev)
{
struct spi_master *master = dev_get_drvdata(dev);
- struct bfin_spi_master *drv_data = spi_master_get_devdata(master);
+ struct adi_spi_master *drv_data = spi_master_get_devdata(master);
spi_master_suspend(master);
- drv_data->control = bfin_read(&drv_data->regs->control);
- drv_data->ssel = bfin_read(&drv_data->regs->ssel);
+ drv_data->control = ioread32(&drv_data->regs->control);
+ drv_data->ssel = ioread32(&drv_data->regs->ssel);
- bfin_write(&drv_data->regs->control, SPI_CTL_MSTR | SPI_CTL_CPHA);
- bfin_write(&drv_data->regs->ssel, 0x0000FE00);
+ iowrite32(SPI_CTL_MSTR | SPI_CTL_CPHA, &drv_data->regs->control);
+ iowrite32(0x0000FE00, &drv_data->regs->ssel);
dma_disable_irq(drv_data->rx_dma);
dma_disable_irq(drv_data->tx_dma);
return 0;
}
-static int bfin_spi_resume(struct device *dev)
+static int adi_spi_resume(struct device *dev)
{
struct spi_master *master = dev_get_drvdata(dev);
- struct bfin_spi_master *drv_data = spi_master_get_devdata(master);
+ struct adi_spi_master *drv_data = spi_master_get_devdata(master);
int ret = 0;
/* bootrom may modify spi and dma status when resume in spi boot mode */
dma_enable_irq(drv_data->rx_dma);
dma_enable_irq(drv_data->tx_dma);
- bfin_write(&drv_data->regs->control, drv_data->control);
- bfin_write(&drv_data->regs->ssel, drv_data->ssel);
+ iowrite32(drv_data->control, &drv_data->regs->control);
+ iowrite32(drv_data->ssel, &drv_data->regs->ssel);
ret = spi_master_resume(master);
if (ret) {
return ret;
}
#endif
-static const struct dev_pm_ops bfin_spi_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(bfin_spi_suspend, bfin_spi_resume)
+static const struct dev_pm_ops adi_spi_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(adi_spi_suspend, adi_spi_resume)
};
-MODULE_ALIAS("platform:bfin-spi3");
-static struct platform_driver bfin_spi_driver = {
+MODULE_ALIAS("platform:adi-spi3");
+static struct platform_driver adi_spi_driver = {
.driver = {
- .name = "bfin-spi3",
+ .name = "adi-spi3",
.owner = THIS_MODULE,
- .pm = &bfin_spi_pm_ops,
+ .pm = &adi_spi_pm_ops,
},
- .remove = bfin_spi_remove,
+ .remove = adi_spi_remove,
};
-module_platform_driver_probe(bfin_spi_driver, bfin_spi_probe);
+module_platform_driver_probe(adi_spi_driver, adi_spi_probe);
MODULE_DESCRIPTION("Analog Devices SPI3 controller driver");
MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
projects / users / hch / dma-mapping.git / commitdiff