spi: sh-hspi: convert to using core message queue
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
parent
6ea41a2bee
commit
ec139b67ad
|
@ -27,7 +27,6 @@
|
|||
#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/pm_runtime.h>
|
||||
|
@ -50,11 +49,7 @@
|
|||
struct hspi_priv {
|
||||
void __iomem *addr;
|
||||
struct spi_master *master;
|
||||
struct list_head queue;
|
||||
struct workqueue_struct *workqueue;
|
||||
struct work_struct ws;
|
||||
struct device *dev;
|
||||
spinlock_t lock;
|
||||
};
|
||||
|
||||
/*
|
||||
|
@ -148,20 +143,67 @@ static int hspi_pop(struct hspi_priv *hspi, struct spi_message *msg,
|
|||
return 0;
|
||||
}
|
||||
|
||||
static void hspi_work(struct work_struct *work)
|
||||
/*
|
||||
* spi master function
|
||||
*/
|
||||
static int hspi_prepare_transfer(struct spi_master *master)
|
||||
{
|
||||
struct hspi_priv *hspi = container_of(work, struct hspi_priv, ws);
|
||||
struct sh_hspi_info *info = hspi2info(hspi);
|
||||
struct spi_message *msg;
|
||||
struct hspi_priv *hspi = spi_master_get_devdata(master);
|
||||
|
||||
pm_runtime_get_sync(hspi->dev);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int hspi_unprepare_transfer(struct spi_master *master)
|
||||
{
|
||||
struct hspi_priv *hspi = spi_master_get_devdata(master);
|
||||
|
||||
pm_runtime_put_sync(hspi->dev);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int hspi_transfer_one_message(struct spi_master *master,
|
||||
struct spi_message *msg)
|
||||
{
|
||||
struct hspi_priv *hspi = spi_master_get_devdata(master);
|
||||
struct spi_transfer *t;
|
||||
unsigned long flags;
|
||||
u32 data;
|
||||
int ret;
|
||||
|
||||
dev_dbg(hspi->dev, "%s\n", __func__);
|
||||
|
||||
/************************ pm enable ************************/
|
||||
pm_runtime_get_sync(hspi->dev);
|
||||
ret = 0;
|
||||
list_for_each_entry(t, &msg->transfers, transfer_list) {
|
||||
if (t->tx_buf) {
|
||||
ret = hspi_push(hspi, msg, t);
|
||||
if (ret < 0)
|
||||
goto error;
|
||||
}
|
||||
if (t->rx_buf) {
|
||||
ret = hspi_pop(hspi, msg, t);
|
||||
if (ret < 0)
|
||||
goto error;
|
||||
}
|
||||
msg->actual_length += t->len;
|
||||
}
|
||||
error:
|
||||
|
||||
msg->status = ret;
|
||||
spi_finalize_current_message(master);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int hspi_setup(struct spi_device *spi)
|
||||
{
|
||||
struct hspi_priv *hspi = spi_master_get_devdata(spi->master);
|
||||
struct device *dev = hspi->dev;
|
||||
struct sh_hspi_info *info = hspi2info(hspi);
|
||||
u32 data;
|
||||
|
||||
if (8 != spi->bits_per_word) {
|
||||
dev_err(dev, "bits_per_word should be 8\n");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
/* setup first of all in under pm_runtime */
|
||||
data = SH_HSPI_CLK_DIVC(info->flags);
|
||||
|
@ -177,59 +219,6 @@ static void hspi_work(struct work_struct *work)
|
|||
hspi_write(hspi, SPSR, 0x0);
|
||||
hspi_write(hspi, SPSCR, 0x1); /* master mode */
|
||||
|
||||
while (1) {
|
||||
msg = NULL;
|
||||
|
||||
/************************ spin lock ************************/
|
||||
spin_lock_irqsave(&hspi->lock, flags);
|
||||
if (!list_empty(&hspi->queue)) {
|
||||
msg = list_entry(hspi->queue.next,
|
||||
struct spi_message, queue);
|
||||
list_del_init(&msg->queue);
|
||||
}
|
||||
spin_unlock_irqrestore(&hspi->lock, flags);
|
||||
/************************ spin unlock ************************/
|
||||
if (!msg)
|
||||
break;
|
||||
|
||||
ret = 0;
|
||||
list_for_each_entry(t, &msg->transfers, transfer_list) {
|
||||
if (t->tx_buf) {
|
||||
ret = hspi_push(hspi, msg, t);
|
||||
if (ret < 0)
|
||||
goto error;
|
||||
}
|
||||
if (t->rx_buf) {
|
||||
ret = hspi_pop(hspi, msg, t);
|
||||
if (ret < 0)
|
||||
goto error;
|
||||
}
|
||||
msg->actual_length += t->len;
|
||||
}
|
||||
error:
|
||||
msg->status = ret;
|
||||
msg->complete(msg->context);
|
||||
}
|
||||
|
||||
pm_runtime_put_sync(hspi->dev);
|
||||
/************************ pm disable ************************/
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* spi master function
|
||||
*/
|
||||
static int hspi_setup(struct spi_device *spi)
|
||||
{
|
||||
struct hspi_priv *hspi = spi_master_get_devdata(spi->master);
|
||||
struct device *dev = hspi->dev;
|
||||
|
||||
if (8 != spi->bits_per_word) {
|
||||
dev_err(dev, "bits_per_word should be 8\n");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
dev_dbg(dev, "%s setup\n", spi->modalias);
|
||||
|
||||
return 0;
|
||||
|
@ -243,26 +232,6 @@ static void hspi_cleanup(struct spi_device *spi)
|
|||
dev_dbg(dev, "%s cleanup\n", spi->modalias);
|
||||
}
|
||||
|
||||
static int hspi_transfer(struct spi_device *spi, struct spi_message *msg)
|
||||
{
|
||||
struct hspi_priv *hspi = spi_master_get_devdata(spi->master);
|
||||
unsigned long flags;
|
||||
|
||||
/************************ spin lock ************************/
|
||||
spin_lock_irqsave(&hspi->lock, flags);
|
||||
|
||||
msg->actual_length = 0;
|
||||
msg->status = -EINPROGRESS;
|
||||
list_add_tail(&msg->queue, &hspi->queue);
|
||||
|
||||
spin_unlock_irqrestore(&hspi->lock, flags);
|
||||
/************************ spin unlock ************************/
|
||||
|
||||
queue_work(hspi->workqueue, &hspi->ws);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __devinit hspi_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct resource *res;
|
||||
|
@ -296,27 +265,19 @@ static int __devinit hspi_probe(struct platform_device *pdev)
|
|||
ret = -ENOMEM;
|
||||
goto error1;
|
||||
}
|
||||
hspi->workqueue = create_singlethread_workqueue(dev_name(&pdev->dev));
|
||||
if (!hspi->workqueue) {
|
||||
dev_err(&pdev->dev, "create workqueue error\n");
|
||||
ret = -EBUSY;
|
||||
goto error2;
|
||||
}
|
||||
|
||||
spin_lock_init(&hspi->lock);
|
||||
INIT_LIST_HEAD(&hspi->queue);
|
||||
INIT_WORK(&hspi->ws, hspi_work);
|
||||
|
||||
master->num_chipselect = 1;
|
||||
master->bus_num = pdev->id;
|
||||
master->setup = hspi_setup;
|
||||
master->transfer = hspi_transfer;
|
||||
master->cleanup = hspi_cleanup;
|
||||
master->mode_bits = SPI_CPOL | SPI_CPHA;
|
||||
master->prepare_transfer_hardware = hspi_prepare_transfer;
|
||||
master->transfer_one_message = hspi_transfer_one_message;
|
||||
master->unprepare_transfer_hardware = hspi_unprepare_transfer;
|
||||
ret = spi_register_master(master);
|
||||
if (ret < 0) {
|
||||
dev_err(&pdev->dev, "spi_register_master error.\n");
|
||||
goto error3;
|
||||
goto error2;
|
||||
}
|
||||
|
||||
pm_runtime_enable(&pdev->dev);
|
||||
|
@ -325,8 +286,6 @@ static int __devinit hspi_probe(struct platform_device *pdev)
|
|||
|
||||
return 0;
|
||||
|
||||
error3:
|
||||
destroy_workqueue(hspi->workqueue);
|
||||
error2:
|
||||
devm_iounmap(hspi->dev, hspi->addr);
|
||||
error1:
|
||||
|
@ -342,7 +301,6 @@ static int __devexit hspi_remove(struct platform_device *pdev)
|
|||
pm_runtime_disable(&pdev->dev);
|
||||
|
||||
spi_unregister_master(hspi->master);
|
||||
destroy_workqueue(hspi->workqueue);
|
||||
devm_iounmap(hspi->dev, hspi->addr);
|
||||
|
||||
return 0;
|
||||
|
|
Loading…
Reference in New Issue