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/*****************************************************************************
Copyright(c) 2012 FCI Inc. All Rights Reserved
File name : fc8150_spi.c
Description : fc8150 host interface
*******************************************************************************/
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include "fci_types.h"
#include "fc8150_regs.h"
#include "fci_oal.h"
#define SPI_BMODE 0x00
#define SPI_WMODE 0x10
#define SPI_LMODE 0x20
#define SPI_READ 0x40
#define SPI_WRITE 0x00
#define SPI_AINC 0x80
#define CHIPID (0 << 3)
#define DRIVER_NAME "fc8150_spi"
struct spi_device *fc8150_spi;
static u8 tx_data[10];
static u8 rdata_buf[8192];
static u8 wdata_buf[8192];
static DEFINE_MUTEX(lock);
static int __devinit fc8150_spi_probe(struct spi_device *spi)
{
s32 ret;
PRINTF(0, "fc8150_spi_probe\n");
spi->max_speed_hz = 24000000;
spi->bits_per_word = 8;
spi->mode = SPI_MODE_0;
ret = spi_setup(spi);
if (ret < 0)
return ret;
fc8150_spi = spi;
return ret;
}
static int fc8150_spi_remove(struct spi_device *spi)
{
return 0;
}
static struct spi_driver fc8150_spi_driver = {
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
},
.probe = fc8150_spi_probe,
.remove = __devexit_p(fc8150_spi_remove),
};
static int fc8150_spi_write_then_read(struct spi_device *spi
, u8 *txbuf, u16 tx_length, u8 *rxbuf, u16 rx_length)
{
int res = 0;
struct spi_message message;
struct spi_transfer x;
spi_message_init(&message);
memset(&x, 0, sizeof x);
spi_message_add_tail(&x, &message);
memcpy(&wdata_buf[0], txbuf, tx_length);
x.tx_buf = &wdata_buf[0];
x.rx_buf = &rdata_buf[0];
x.len = tx_length + rx_length;
x.cs_change = 0;
x.bits_per_word = 8;
res = spi_sync(spi, &message);
memcpy(rxbuf, x.rx_buf + tx_length, rx_length);
return res;
}
static int spi_bulkread(HANDLE hDevice, u16 addr
, u8 command, u8 *data, u16 length)
{
int res;
tx_data[0] = addr & 0xff;
tx_data[1] = (addr >> 8) & 0xff;
tx_data[2] = (command & 0xf0) | CHIPID | ((length >> 16) & 0x07);
tx_data[3] = (length >> 8) & 0xff;
tx_data[4] = length & 0xff;
res = fc8150_spi_write_then_read(fc8150_spi, &tx_data[0]
, 5, data, length);
if (res) {
PRINTF(0, "fc8150_spi_bulkread fail : %d\n", res);
return BBM_NOK;
}
return BBM_OK;
}
static int spi_bulkwrite(HANDLE hDevice, u16 addr
, u8 command, u8 *data, u16 length)
{
int i;
int res;
tx_data[0] = addr & 0xff;
tx_data[1] = (addr >> 8) & 0xff;
tx_data[2] = (command & 0xf0) | CHIPID | ((length >> 16) & 0x07);
tx_data[3] = (length >> 8) & 0xff;
tx_data[4] = length & 0xff;
for (i = 0; i < length; i++)
tx_data[5+i] = data[i];
res = fc8150_spi_write_then_read(fc8150_spi
, &tx_data[0], length+5, NULL, 0);
if (res) {
PRINTF(0, "fc8150_spi_bulkwrite fail : %d\n", res);
return BBM_NOK;
}
return BBM_OK;
}
static int spi_dataread(HANDLE hDevice, u16 addr
, u8 command, u8 *data, u32 length)
{
int res;
tx_data[0] = addr & 0xff;
tx_data[1] = (addr >> 8) & 0xff;
tx_data[2] = (command & 0xf0) | CHIPID | ((length >> 16) & 0x07);
tx_data[3] = (length >> 8) & 0xff;
tx_data[4] = length & 0xff;
res = fc8150_spi_write_then_read(fc8150_spi
, &tx_data[0], 5, data, length);
if (res) {
PRINTF(0, "fc8150_spi_dataread fail : %d\n", res);
return BBM_NOK;
}
return BBM_OK;
}
int fc8150_spi_init(HANDLE hDevice, u16 param1, u16 param2)
{
int res = 0;
PRINTF(0, "fc8150_spi_init : %d\n", res);
res = spi_register_driver(&fc8150_spi_driver);
if (res) {
PRINTF(0, "fc8150_spi register fail : %d\n", res);
return BBM_NOK;
}
return res;
}
int fc8150_spi_byteread(HANDLE hDevice, u16 addr, u8 *data)
{
int res;
u8 command = SPI_READ;
mutex_lock(&lock);
res = spi_bulkread(hDevice, addr, command, data, 1);
mutex_unlock(&lock);
return res;
}
int fc8150_spi_wordread(HANDLE hDevice, u16 addr, u16 *data)
{
int res;
u8 command = SPI_READ | SPI_AINC;
mutex_lock(&lock);
res = spi_bulkread(hDevice, addr, command, (u8 *)data, 2);
mutex_unlock(&lock);
return res;
}
int fc8150_spi_longread(HANDLE hDevice, u16 addr, u32 *data)
{
int res;
u8 command = SPI_READ | SPI_AINC;
mutex_lock(&lock);
res = spi_bulkread(hDevice, addr, command, (u8 *)data, 4);
mutex_unlock(&lock);
return res;
}
int fc8150_spi_bulkread(HANDLE hDevice, u16 addr, u8 *data, u16 length)
{
int res;
u8 command = SPI_READ | SPI_AINC;
mutex_lock(&lock);
res = spi_bulkread(hDevice, addr, command, data, length);
mutex_unlock(&lock);
return res;
}
int fc8150_spi_bytewrite(HANDLE hDevice, u16 addr, u8 data)
{
int res;
u8 command = SPI_WRITE;
mutex_lock(&lock);
res = spi_bulkwrite(hDevice, addr, command, (u8 *)&data, 1);
mutex_unlock(&lock);
return res;
}
int fc8150_spi_wordwrite(HANDLE hDevice, u16 addr, u16 data)
{
int res;
u8 command = SPI_WRITE | SPI_AINC;
mutex_lock(&lock);
res = spi_bulkwrite(hDevice, addr, command, (u8 *)&data, 2);
mutex_unlock(&lock);
return res;
}
int fc8150_spi_longwrite(HANDLE hDevice, u16 addr, u32 data)
{
int res;
u8 command = SPI_WRITE | SPI_AINC;
mutex_lock(&lock);
res = spi_bulkwrite(hDevice, addr, command, (u8 *)&data, 4);
mutex_unlock(&lock);
return res;
}
int fc8150_spi_bulkwrite(HANDLE hDevice, u16 addr, u8 *data, u16 length)
{
int res;
u8 command = SPI_WRITE | SPI_AINC;
mutex_lock(&lock);
res = spi_bulkwrite(hDevice, addr, command, data, length);
mutex_unlock(&lock);
return res;
}
int fc8150_spi_dataread(HANDLE hDevice, u16 addr, u8 *data, u32 length)
{
int res;
u8 command = SPI_READ;
mutex_lock(&lock);
res = spi_dataread(hDevice, addr, command, data, length);
mutex_unlock(&lock);
return res;
}
int fc8150_spi_deinit(HANDLE hDevice)
{
return BBM_OK;
}
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