[PATCH 15/22] spi: remove spi-sh

Christoph Hellwig
2023-01-13T06:30:43Z

Now that arch/sh is removed this driver is dead code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/spi/Kconfig | 6 -
drivers/spi/Makefile | 1 -
drivers/spi/spi-sh.c | 474 -------------------------------------------
3 files changed, 481 deletions(-)
delete mode 100644 drivers/spi/spi-sh.c

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 2c5226adf5e1d3..7508dcef909c78 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -882,12 +882,6 @@ config SPI_SH_MSIOF
help
SPI driver for SuperH and SH Mobile MSIOF blocks.

-config SPI_SH
- tristate "SuperH SPI controller"
- depends on SUPERH || COMPILE_TEST
- help
- SPI driver for SuperH SPI blocks.
-
config SPI_SH_SCI
tristate "SuperH SCI SPI controller"
depends on SUPERH
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index be9ba40ef8d03d..342a7eb5181c9b 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -116,7 +116,6 @@ obj-$(CONFIG_SPI_S3C24XX) += spi-s3c24xx-hw.o
spi-s3c24xx-hw-y := spi-s3c24xx.o
obj-$(CONFIG_SPI_S3C64XX) += spi-s3c64xx.o
obj-$(CONFIG_SPI_SC18IS602) += spi-sc18is602.o
-obj-$(CONFIG_SPI_SH) += spi-sh.o
obj-$(CONFIG_SPI_SH_HSPI) += spi-sh-hspi.o
obj-$(CONFIG_SPI_SH_MSIOF) += spi-sh-msiof.o
obj-$(CONFIG_SPI_SH_SCI) += spi-sh-sci.o
diff --git a/drivers/spi/spi-sh.c b/drivers/spi/spi-sh.c
deleted file mode 100644
index 3e72fad99adfd4..00000000000000
--- a/drivers/spi/spi-sh.c
+++ /dev/null
@@ -1,474 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * SH SPI bus driver
- *
- * Copyright (C) 2011 Renesas Solutions Corp.
- *
- * Based on pxa2xx_spi.c:
- * Copyright (C) 2005 Stephen Street / StreetFire Sound Labs
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <linux/timer.h>
-#include <linux/delay.h>
-#include <linux/list.h>
-#include <linux/workqueue.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/spi/spi.h>
-
-#define SPI_SH_TBR 0x00
-#define SPI_SH_RBR 0x00
-#define SPI_SH_CR1 0x08
-#define SPI_SH_CR2 0x10
-#define SPI_SH_CR3 0x18
-#define SPI_SH_CR4 0x20
-#define SPI_SH_CR5 0x28
-
-/* CR1 */
-#define SPI_SH_TBE 0x80
-#define SPI_SH_TBF 0x40
-#define SPI_SH_RBE 0x20
-#define SPI_SH_RBF 0x10
-#define SPI_SH_PFONRD 0x08
-#define SPI_SH_SSDB 0x04
-#define SPI_SH_SSD 0x02
-#define SPI_SH_SSA 0x01
-
-/* CR2 */
-#define SPI_SH_RSTF 0x80
-#define SPI_SH_LOOPBK 0x40
-#define SPI_SH_CPOL 0x20
-#define SPI_SH_CPHA 0x10
-#define SPI_SH_L1M0 0x08
-
-/* CR3 */
-#define SPI_SH_MAX_BYTE 0xFF
-
-/* CR4 */
-#define SPI_SH_TBEI 0x80
-#define SPI_SH_TBFI 0x40
-#define SPI_SH_RBEI 0x20
-#define SPI_SH_RBFI 0x10
-#define SPI_SH_WPABRT 0x04
-#define SPI_SH_SSS 0x01
-
-/* CR8 */
-#define SPI_SH_P1L0 0x80
-#define SPI_SH_PP1L0 0x40
-#define SPI_SH_MUXI 0x20
-#define SPI_SH_MUXIRQ 0x10
-
-#define SPI_SH_FIFO_SIZE 32
-#define SPI_SH_SEND_TIMEOUT (3 * HZ)
-#define SPI_SH_RECEIVE_TIMEOUT (HZ >> 3)
-
-#undef DEBUG
-
-struct spi_sh_data {
- void __iomem *addr;
- int irq;
- struct spi_master *master;
- unsigned long cr1;
- wait_queue_head_t wait;
- int width;
-};
-
-static void spi_sh_write(struct spi_sh_data *ss, unsigned long data,
- unsigned long offset)
-{
- if (ss->width == 8)
- iowrite8(data, ss->addr + (offset >> 2));
- else if (ss->width == 32)
- iowrite32(data, ss->addr + offset);
-}
-
-static unsigned long spi_sh_read(struct spi_sh_data *ss, unsigned long offset)
-{
- if (ss->width == 8)
- return ioread8(ss->addr + (offset >> 2));
- else if (ss->width == 32)
- return ioread32(ss->addr + offset);
- else
- return 0;
-}
-
-static void spi_sh_set_bit(struct spi_sh_data *ss, unsigned long val,
- unsigned long offset)
-{
- unsigned long tmp;
-
- tmp = spi_sh_read(ss, offset);
- tmp |= val;
- spi_sh_write(ss, tmp, offset);
-}
-
-static void spi_sh_clear_bit(struct spi_sh_data *ss, unsigned long val,
- unsigned long offset)
-{
- unsigned long tmp;
-
- tmp = spi_sh_read(ss, offset);
- tmp &= ~val;
- spi_sh_write(ss, tmp, offset);
-}
-
-static void clear_fifo(struct spi_sh_data *ss)
-{
- spi_sh_set_bit(ss, SPI_SH_RSTF, SPI_SH_CR2);
- spi_sh_clear_bit(ss, SPI_SH_RSTF, SPI_SH_CR2);
-}
-
-static int spi_sh_wait_receive_buffer(struct spi_sh_data *ss)
-{
- int timeout = 100000;
-
- while (spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_RBE) {
- udelay(10);
- if (timeout-- < 0)
- return -ETIMEDOUT;
- }
- return 0;
-}
-
-static int spi_sh_wait_write_buffer_empty(struct spi_sh_data *ss)
-{
- int timeout = 100000;
-
- while (!(spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_TBE)) {
- udelay(10);
- if (timeout-- < 0)
- return -ETIMEDOUT;
- }
- return 0;
-}
-
-static int spi_sh_send(struct spi_sh_data *ss, struct spi_message *mesg,
- struct spi_transfer *t)
-{
- int i, retval = 0;
- int remain = t->len;
- int cur_len;
- unsigned char *data;
- long ret;
-
- if (t->len)
- spi_sh_set_bit(ss, SPI_SH_SSA, SPI_SH_CR1);
-
- data = (unsigned char *)t->tx_buf;
- while (remain > 0) {
- cur_len = min(SPI_SH_FIFO_SIZE, remain);
- for (i = 0; i < cur_len &&
- !(spi_sh_read(ss, SPI_SH_CR4) &
- SPI_SH_WPABRT) &&
- !(spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_TBF);
- i++)
- spi_sh_write(ss, (unsigned long)data[i], SPI_SH_TBR);
-
- if (spi_sh_read(ss, SPI_SH_CR4) & SPI_SH_WPABRT) {
- /* Abort SPI operation */
- spi_sh_set_bit(ss, SPI_SH_WPABRT, SPI_SH_CR4);
- retval = -EIO;
- break;
- }
-
- cur_len = i;
-
- remain -= cur_len;
- data += cur_len;
-
- if (remain > 0) {
- ss->cr1 &= ~SPI_SH_TBE;
- spi_sh_set_bit(ss, SPI_SH_TBE, SPI_SH_CR4);
- ret = wait_event_interruptible_timeout(ss->wait,
- ss->cr1 & SPI_SH_TBE,
- SPI_SH_SEND_TIMEOUT);
- if (ret == 0 && !(ss->cr1 & SPI_SH_TBE)) {
- printk(KERN_ERR "%s: timeout\n", __func__);
- return -ETIMEDOUT;
- }
- }
- }
-
- if (list_is_last(&t->transfer_list, &mesg->transfers)) {
- spi_sh_clear_bit(ss, SPI_SH_SSD | SPI_SH_SSDB, SPI_SH_CR1);
- spi_sh_set_bit(ss, SPI_SH_SSA, SPI_SH_CR1);
-
- ss->cr1 &= ~SPI_SH_TBE;
- spi_sh_set_bit(ss, SPI_SH_TBE, SPI_SH_CR4);
- ret = wait_event_interruptible_timeout(ss->wait,
- ss->cr1 & SPI_SH_TBE,
- SPI_SH_SEND_TIMEOUT);
- if (ret == 0 && (ss->cr1 & SPI_SH_TBE)) {
- printk(KERN_ERR "%s: timeout\n", __func__);
- return -ETIMEDOUT;
- }
- }
-
- return retval;
-}
-
-static int spi_sh_receive(struct spi_sh_data *ss, struct spi_message *mesg,
- struct spi_transfer *t)
-{
- int i;
- int remain = t->len;
- int cur_len;
- unsigned char *data;
- long ret;
-
- if (t->len > SPI_SH_MAX_BYTE)
- spi_sh_write(ss, SPI_SH_MAX_BYTE, SPI_SH_CR3);
- else
- spi_sh_write(ss, t->len, SPI_SH_CR3);
-
- spi_sh_clear_bit(ss, SPI_SH_SSD | SPI_SH_SSDB, SPI_SH_CR1);
- spi_sh_set_bit(ss, SPI_SH_SSA, SPI_SH_CR1);
-
- spi_sh_wait_write_buffer_empty(ss);
-
- data = (unsigned char *)t->rx_buf;
- while (remain > 0) {
- if (remain >= SPI_SH_FIFO_SIZE) {
- ss->cr1 &= ~SPI_SH_RBF;
- spi_sh_set_bit(ss, SPI_SH_RBF, SPI_SH_CR4);
- ret = wait_event_interruptible_timeout(ss->wait,
- ss->cr1 & SPI_SH_RBF,
- SPI_SH_RECEIVE_TIMEOUT);
- if (ret == 0 &&
- spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_RBE) {
- printk(KERN_ERR "%s: timeout\n", __func__);
- return -ETIMEDOUT;
- }
- }
-
- cur_len = min(SPI_SH_FIFO_SIZE, remain);
- for (i = 0; i < cur_len; i++) {
- if (spi_sh_wait_receive_buffer(ss))
- break;
- data[i] = (unsigned char)spi_sh_read(ss, SPI_SH_RBR);
- }
-
- remain -= cur_len;
- data += cur_len;
- }
-
- /* deassert CS when SPI is receiving. */
- if (t->len > SPI_SH_MAX_BYTE) {
- clear_fifo(ss);
- spi_sh_write(ss, 1, SPI_SH_CR3);
- } else {
- spi_sh_write(ss, 0, SPI_SH_CR3);
- }
-
- return 0;
-}
-
-static int spi_sh_transfer_one_message(struct spi_controller *ctlr,
- struct spi_message *mesg)
-{
- struct spi_sh_data *ss = spi_controller_get_devdata(ctlr);
- struct spi_transfer *t;
- int ret;
-
- pr_debug("%s: enter\n", __func__);
-
- spi_sh_clear_bit(ss, SPI_SH_SSA, SPI_SH_CR1);
-
- list_for_each_entry(t, &mesg->transfers, transfer_list) {
- pr_debug("tx_buf = %p, rx_buf = %p\n",
- t->tx_buf, t->rx_buf);
- pr_debug("len = %d, delay.value = %d\n",
- t->len, t->delay.value);
-
- if (t->tx_buf) {
- ret = spi_sh_send(ss, mesg, t);
- if (ret < 0)
- goto error;
- }
- if (t->rx_buf) {
- ret = spi_sh_receive(ss, mesg, t);
- if (ret < 0)
- goto error;
- }
- mesg->actual_length += t->len;
- }
-
- mesg->status = 0;
- spi_finalize_current_message(ctlr);
-
- clear_fifo(ss);
- spi_sh_set_bit(ss, SPI_SH_SSD, SPI_SH_CR1);
- udelay(100);
-
- spi_sh_clear_bit(ss, SPI_SH_SSA | SPI_SH_SSDB | SPI_SH_SSD,
- SPI_SH_CR1);
-
- clear_fifo(ss);
-
- return 0;
-
- error:
- mesg->status = ret;
- spi_finalize_current_message(ctlr);
- if (mesg->complete)
- mesg->complete(mesg->context);
-
- spi_sh_clear_bit(ss, SPI_SH_SSA | SPI_SH_SSDB | SPI_SH_SSD,
- SPI_SH_CR1);
- clear_fifo(ss);
-
- return ret;
-}
-
-static int spi_sh_setup(struct spi_device *spi)
-{
- struct spi_sh_data *ss = spi_master_get_devdata(spi->master);
-
- pr_debug("%s: enter\n", __func__);
-
- spi_sh_write(ss, 0xfe, SPI_SH_CR1); /* SPI sycle stop */
- spi_sh_write(ss, 0x00, SPI_SH_CR1); /* CR1 init */
- spi_sh_write(ss, 0x00, SPI_SH_CR3); /* CR3 init */
-
- clear_fifo(ss);
-
- /* 1/8 clock */
- spi_sh_write(ss, spi_sh_read(ss, SPI_SH_CR2) | 0x07, SPI_SH_CR2);
- udelay(10);
-
- return 0;
-}
-
-static void spi_sh_cleanup(struct spi_device *spi)
-{
- struct spi_sh_data *ss = spi_master_get_devdata(spi->master);
-
- pr_debug("%s: enter\n", __func__);
-
- spi_sh_clear_bit(ss, SPI_SH_SSA | SPI_SH_SSDB | SPI_SH_SSD,
- SPI_SH_CR1);
-}
-
-static irqreturn_t spi_sh_irq(int irq, void *_ss)
-{
- struct spi_sh_data *ss = (struct spi_sh_data *)_ss;
- unsigned long cr1;
-
- cr1 = spi_sh_read(ss, SPI_SH_CR1);
- if (cr1 & SPI_SH_TBE)
- ss->cr1 |= SPI_SH_TBE;
- if (cr1 & SPI_SH_TBF)
- ss->cr1 |= SPI_SH_TBF;
- if (cr1 & SPI_SH_RBE)
- ss->cr1 |= SPI_SH_RBE;
- if (cr1 & SPI_SH_RBF)
- ss->cr1 |= SPI_SH_RBF;
-
- if (ss->cr1) {
- spi_sh_clear_bit(ss, ss->cr1, SPI_SH_CR4);
- wake_up(&ss->wait);
- }
-
- return IRQ_HANDLED;
-}
-
-static int spi_sh_remove(struct platform_device *pdev)
-{
- struct spi_sh_data *ss = platform_get_drvdata(pdev);
-
- spi_unregister_master(ss->master);
- free_irq(ss->irq, ss);
-
- return 0;
-}
-
-static int spi_sh_probe(struct platform_device *pdev)
-{
- struct resource *res;
- struct spi_master *master;
- struct spi_sh_data *ss;
- int ret, irq;
-
- /* get base addr */
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (unlikely(res == NULL)) {
- dev_err(&pdev->dev, "invalid resource\n");
- return -EINVAL;
- }
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return irq;
-
- master = devm_spi_alloc_master(&pdev->dev, sizeof(struct spi_sh_data));
- if (master == NULL) {
- dev_err(&pdev->dev, "spi_alloc_master error.\n");
- return -ENOMEM;
- }
-
- ss = spi_master_get_devdata(master);
- platform_set_drvdata(pdev, ss);
-
- switch (res->flags & IORESOURCE_MEM_TYPE_MASK) {
- case IORESOURCE_MEM_8BIT:
- ss->width = 8;
- break;
- case IORESOURCE_MEM_32BIT:
- ss->width = 32;
- break;
- default:
- dev_err(&pdev->dev, "No support width\n");
- return -ENODEV;
- }
- ss->irq = irq;
- ss->master = master;
- ss->addr = devm_ioremap(&pdev->dev, res->start, resource_size(res));
- if (ss->addr == NULL) {
- dev_err(&pdev->dev, "ioremap error.\n");
- return -ENOMEM;
- }
- init_waitqueue_head(&ss->wait);
-
- ret = request_irq(irq, spi_sh_irq, 0, "spi_sh", ss);
- if (ret < 0) {
- dev_err(&pdev->dev, "request_irq error\n");
- return ret;
- }
-
- master->num_chipselect = 2;
- master->bus_num = pdev->id;
- master->setup = spi_sh_setup;
- master->transfer_one_message = spi_sh_transfer_one_message;
- master->cleanup = spi_sh_cleanup;
-
- ret = spi_register_master(master);
- if (ret < 0) {
- printk(KERN_ERR "spi_register_master error.\n");
- goto error3;
- }
-
- return 0;
-
- error3:
- free_irq(irq, ss);
- return ret;
-}
-
-static struct platform_driver spi_sh_driver = {
- .probe = spi_sh_probe,
- .remove = spi_sh_remove,
- .driver = {
- .name = "sh_spi",
- },
-};
-module_platform_driver(spi_sh_driver);
-
-MODULE_DESCRIPTION("SH SPI bus driver");
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Yoshihiro Shimoda");
-MODULE_ALIAS("platform:sh_spi");
--
2.39.0