2012-11-22 22:39:18 +08:00
|
|
|
/*
|
|
|
|
* Samsung LSI S5C73M3 8M pixel camera driver
|
|
|
|
*
|
|
|
|
* Copyright (C) 2012, Samsung Electronics, Co., Ltd.
|
|
|
|
* Sylwester Nawrocki <s.nawrocki@samsung.com>
|
|
|
|
* Andrzej Hajda <a.hajda@samsung.com>
|
|
|
|
*
|
|
|
|
* 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 published by the Free Software Foundation.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/sizes.h>
|
|
|
|
#include <linux/delay.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/media.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/spi/spi.h>
|
|
|
|
|
|
|
|
#include "s5c73m3.h"
|
|
|
|
|
|
|
|
#define S5C73M3_SPI_DRV_NAME "S5C73M3-SPI"
|
|
|
|
|
2013-12-21 06:46:44 +08:00
|
|
|
static const struct of_device_id s5c73m3_spi_ids[] = {
|
|
|
|
{ .compatible = "samsung,s5c73m3" },
|
|
|
|
{ }
|
|
|
|
};
|
2015-09-11 18:53:09 +08:00
|
|
|
MODULE_DEVICE_TABLE(of, s5c73m3_spi_ids);
|
2013-12-21 06:46:44 +08:00
|
|
|
|
2012-11-22 22:39:18 +08:00
|
|
|
enum spi_direction {
|
|
|
|
SPI_DIR_RX,
|
|
|
|
SPI_DIR_TX
|
|
|
|
};
|
|
|
|
|
|
|
|
static int spi_xmit(struct spi_device *spi_dev, void *addr, const int len,
|
|
|
|
enum spi_direction dir)
|
|
|
|
{
|
|
|
|
struct spi_message msg;
|
|
|
|
int r;
|
|
|
|
struct spi_transfer xfer = {
|
|
|
|
.len = len,
|
|
|
|
};
|
|
|
|
|
|
|
|
if (dir == SPI_DIR_TX)
|
|
|
|
xfer.tx_buf = addr;
|
|
|
|
else
|
|
|
|
xfer.rx_buf = addr;
|
|
|
|
|
|
|
|
if (spi_dev == NULL) {
|
2015-02-24 12:47:32 +08:00
|
|
|
pr_err("SPI device is uninitialized\n");
|
2012-11-22 22:39:18 +08:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
spi_message_init(&msg);
|
|
|
|
spi_message_add_tail(&xfer, &msg);
|
|
|
|
|
|
|
|
r = spi_sync(spi_dev, &msg);
|
|
|
|
if (r < 0)
|
|
|
|
dev_err(&spi_dev->dev, "%s spi_sync failed %d\n", __func__, r);
|
|
|
|
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
int s5c73m3_spi_write(struct s5c73m3 *state, const void *addr,
|
|
|
|
const unsigned int len, const unsigned int tx_size)
|
|
|
|
{
|
|
|
|
struct spi_device *spi_dev = state->spi_dev;
|
|
|
|
u32 count = len / tx_size;
|
|
|
|
u32 extra = len % tx_size;
|
|
|
|
unsigned int i, j = 0;
|
|
|
|
u8 padding[32];
|
|
|
|
int r = 0;
|
|
|
|
|
|
|
|
memset(padding, 0, sizeof(padding));
|
|
|
|
|
2013-04-30 16:04:09 +08:00
|
|
|
for (i = 0; i < count; i++) {
|
2012-11-22 22:39:18 +08:00
|
|
|
r = spi_xmit(spi_dev, (void *)addr + j, tx_size, SPI_DIR_TX);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
|
|
|
j += tx_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (extra > 0) {
|
|
|
|
r = spi_xmit(spi_dev, (void *)addr + j, extra, SPI_DIR_TX);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
return spi_xmit(spi_dev, padding, sizeof(padding), SPI_DIR_TX);
|
|
|
|
}
|
|
|
|
|
|
|
|
int s5c73m3_spi_read(struct s5c73m3 *state, void *addr,
|
|
|
|
const unsigned int len, const unsigned int tx_size)
|
|
|
|
{
|
|
|
|
struct spi_device *spi_dev = state->spi_dev;
|
|
|
|
u32 count = len / tx_size;
|
|
|
|
u32 extra = len % tx_size;
|
|
|
|
unsigned int i, j = 0;
|
|
|
|
int r = 0;
|
|
|
|
|
2013-04-30 16:04:09 +08:00
|
|
|
for (i = 0; i < count; i++) {
|
2012-11-22 22:39:18 +08:00
|
|
|
r = spi_xmit(spi_dev, addr + j, tx_size, SPI_DIR_RX);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
|
|
|
j += tx_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (extra > 0)
|
|
|
|
return spi_xmit(spi_dev, addr + j, extra, SPI_DIR_RX);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-02-07 04:35:41 +08:00
|
|
|
static int s5c73m3_spi_probe(struct spi_device *spi)
|
2012-11-22 22:39:18 +08:00
|
|
|
{
|
|
|
|
int r;
|
|
|
|
struct s5c73m3 *state = container_of(spi->dev.driver, struct s5c73m3,
|
|
|
|
spidrv.driver);
|
|
|
|
spi->bits_per_word = 32;
|
|
|
|
|
|
|
|
r = spi_setup(spi);
|
|
|
|
if (r < 0) {
|
|
|
|
dev_err(&spi->dev, "spi_setup() failed\n");
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
mutex_lock(&state->lock);
|
|
|
|
state->spi_dev = spi;
|
|
|
|
mutex_unlock(&state->lock);
|
|
|
|
|
|
|
|
v4l2_info(&state->sensor_sd, "S5C73M3 SPI probed successfully\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-02-07 04:35:41 +08:00
|
|
|
static int s5c73m3_spi_remove(struct spi_device *spi)
|
2012-11-22 22:39:18 +08:00
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int s5c73m3_register_spi_driver(struct s5c73m3 *state)
|
|
|
|
{
|
|
|
|
struct spi_driver *spidrv = &state->spidrv;
|
|
|
|
|
2013-02-07 04:35:41 +08:00
|
|
|
spidrv->remove = s5c73m3_spi_remove;
|
2012-11-22 22:39:18 +08:00
|
|
|
spidrv->probe = s5c73m3_spi_probe;
|
|
|
|
spidrv->driver.name = S5C73M3_SPI_DRV_NAME;
|
2013-12-21 06:46:44 +08:00
|
|
|
spidrv->driver.of_match_table = s5c73m3_spi_ids;
|
2012-11-22 22:39:18 +08:00
|
|
|
|
|
|
|
return spi_register_driver(spidrv);
|
|
|
|
}
|
|
|
|
|
|
|
|
void s5c73m3_unregister_spi_driver(struct s5c73m3 *state)
|
|
|
|
{
|
|
|
|
spi_unregister_driver(&state->spidrv);
|
|
|
|
}
|