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/*****************************************************************************
Copyright(c) 2009 FCI Inc. All Rights Reserved
File name : fc8050_spi.c
Description : fc8050 host interface
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
History :
----------------------------------------------------------------------
2009/08/29 jason initial
*******************************************************************************/
#include <linux/input.h>
#include <linux/spi/spi.h>
#include "fci_types.h"
#include "fc8050_regs.h"
#include "fci_oal.h"
#include "fc8050_spi.h"
#include "tdmb.h"
#define DRIVER_NAME "fc8050_spi"
#define HPIC_READ 0x01 /* read command */
#define HPIC_WRITE 0x02 /* write command */
#define HPIC_AINC 0x04 /* address increment */
#define HPIC_BMODE 0x00 /* byte mode */
#define HPIC_WMODE 0x10 /* word mode */
#define HPIC_LMODE 0x20 /* long mode */
#define HPIC_ENDIAN 0x00 /* little endian */
#define HPIC_CLEAR 0x80 /* currently not used */
#define CHIPID 0
#if (CHIPID == 0)
#define SPI_CMD_WRITE 0x0
#define SPI_CMD_READ 0x1
#define SPI_CMD_BURST_WRITE 0x2
#define SPI_CMD_BURST_READ 0x3
#else
#define SPI_CMD_WRITE 0x4
#define SPI_CMD_READ 0x5
#define SPI_CMD_BURST_WRITE 0x6
#define SPI_CMD_BURST_READ 0x7
#endif
struct spi_device *fc8050_spi;
static u8 tx_data[10];
static DEFINE_MUTEX(lock);
int fc8050_spi_write_then_read(
struct spi_device *spi
, u8 *txbuf
, u16 tx_length
, u8 *rxbuf
, u16 rx_length)
{
s32 res;
struct spi_message message;
struct spi_transfer x;
spi_message_init(&message);
memset(&x, 0, sizeof x);
spi_message_add_tail(&x, &message);
x.tx_buf = txbuf;
x.rx_buf = txbuf;
x.len = tx_length + rx_length;
res = spi_sync(spi, &message);
memcpy(rxbuf, x.rx_buf + tx_length, rx_length);
return res;
}
int fc8050_spi_write_then_burstread(
struct spi_device *spi
, u8 *txbuf
, u16 tx_length
, u8 *rxbuf
, u16 rx_length)
{
s32 res;
struct spi_message message;
struct spi_transfer x;
spi_message_init(&message);
memset(&x, 0, sizeof x);
spi_message_add_tail(&x, &message);
x.tx_buf = txbuf;
x.rx_buf = rxbuf;
x.len = tx_length + rx_length;
res = spi_sync(spi, &message);
return res;
}
static int spi_bulkread(HANDLE hDevice, u8 addr, u8 *data, u16 length)
{
s32 ret;
tx_data[0] = SPI_CMD_BURST_READ;
tx_data[1] = addr;
fc8050_spi = tdmb_get_spi_handle();
ret = fc8050_spi_write_then_read(
fc8050_spi, &tx_data[0], 2, &data[0], length);
if (ret) {
print_log(0, "fc8050_spi_bulkread fail : %d\n", ret);
return BBM_NOK;
}
return BBM_OK;
}
static int spi_bulkwrite(HANDLE hDevice, u8 addr, u8 *data, u16 length)
{
s32 ret;
s32 i;
tx_data[0] = SPI_CMD_BURST_WRITE;
tx_data[1] = addr;
for (i = 0; i < length; i++)
tx_data[2+i] = data[i];
fc8050_spi = tdmb_get_spi_handle();
ret = fc8050_spi_write_then_read(
fc8050_spi, &tx_data[0], length+2, NULL, 0);
if (ret) {
print_log(0, "fc8050_spi_bulkwrite fail : %d\n", ret);
return BBM_NOK;
}
return BBM_OK;
}
static int spi_dataread(HANDLE hDevice, u8 addr, u8 *data, u16 length)
{
s32 ret = 0;
tx_data[0] = SPI_CMD_BURST_READ;
tx_data[1] = addr;
fc8050_spi = tdmb_get_spi_handle();
ret = fc8050_spi_write_then_burstread(
fc8050_spi, &tx_data[0], 2, &data[0], length);
if (ret) {
print_log(0, "fc8050_spi_dataread fail : %d\n", ret);
return BBM_NOK;
}
return BBM_OK;
}
int fc8050_spi_init(HANDLE hDevice, u16 param1, u16 param2)
{
return BBM_OK;
}
int fc8050_spi_byteread(HANDLE hDevice, u16 addr, u8 *data)
{
int res;
u8 command = HPIC_READ | HPIC_BMODE | HPIC_ENDIAN;
mutex_lock(&lock);
res = spi_bulkwrite(hDevice, BBM_COMMAND_REG, &command, 1);
res |= spi_bulkwrite(hDevice, BBM_ADDRESS_REG, (u8 *)&addr, 2);
res |= spi_bulkread(hDevice, BBM_DATA_REG, data, 1);
mutex_unlock(&lock);
return res;
}
int fc8050_spi_wordread(HANDLE hDevice, u16 addr, u16 *data)
{
int res;
u8 command = HPIC_READ | HPIC_AINC | HPIC_BMODE | HPIC_ENDIAN;
if (BBM_SCI_DATA <= addr && BBM_SCI_SYNCRX >= addr)
command = HPIC_READ | HPIC_WMODE | HPIC_ENDIAN;
mutex_lock(&lock);
res = spi_bulkwrite(hDevice, BBM_COMMAND_REG, &command, 1);
res |= spi_bulkwrite(hDevice, BBM_ADDRESS_REG, (u8 *)&addr, 2);
res |= spi_bulkread(hDevice, BBM_DATA_REG, (u8 *)data, 2);
mutex_unlock(&lock);
return res;
}
int fc8050_spi_longread(HANDLE hDevice, u16 addr, u32 *data)
{
int res;
u8 command = HPIC_READ | HPIC_AINC | HPIC_BMODE | HPIC_ENDIAN;
mutex_lock(&lock);
res = spi_bulkwrite(hDevice, BBM_COMMAND_REG, &command, 1);
res |= spi_bulkwrite(hDevice, BBM_ADDRESS_REG, (u8 *)&addr, 2);
res |= spi_bulkread(hDevice, BBM_DATA_REG, (u8 *)data, 4);
mutex_unlock(&lock);
return res;
}
int fc8050_spi_bulkread(HANDLE hDevice, u16 addr, u8 *data, u16 length)
{
int res;
u8 command = HPIC_READ | HPIC_AINC | HPIC_BMODE | HPIC_ENDIAN;
mutex_lock(&lock);
res = spi_bulkwrite(hDevice, BBM_COMMAND_REG, &command, 1);
res |= spi_bulkwrite(hDevice, BBM_ADDRESS_REG, (u8 *)&addr, 2);
res |= spi_bulkread(hDevice, BBM_DATA_REG, data, length);
mutex_unlock(&lock);
return res;
}
int fc8050_spi_bytewrite(HANDLE hDevice, u16 addr, u8 data)
{
int res;
u8 command = HPIC_WRITE | HPIC_BMODE | HPIC_ENDIAN;
mutex_lock(&lock);
res = spi_bulkwrite(hDevice, BBM_COMMAND_REG, &command, 1);
res |= spi_bulkwrite(hDevice, BBM_ADDRESS_REG, (u8 *)&addr, 2);
res |= spi_bulkwrite(hDevice, BBM_DATA_REG, (u8 *)&data, 1);
mutex_unlock(&lock);
return res;
}
int fc8050_spi_wordwrite(HANDLE hDevice, u16 addr, u16 data)
{
int res;
u8 command = HPIC_WRITE | HPIC_AINC | HPIC_BMODE | HPIC_ENDIAN;
if (BBM_SCI_DATA <= addr && BBM_SCI_SYNCRX >= addr)
command = HPIC_WRITE | HPIC_WMODE | HPIC_ENDIAN;
mutex_lock(&lock);
res = spi_bulkwrite(hDevice, BBM_COMMAND_REG, &command, 1);
res |= spi_bulkwrite(hDevice, BBM_ADDRESS_REG, (u8 *)&addr, 2);
res |= spi_bulkwrite(hDevice, BBM_DATA_REG, (u8 *)&data, 2);
mutex_unlock(&lock);
return res;
}
int fc8050_spi_longwrite(HANDLE hDevice, u16 addr, u32 data)
{
int res;
u8 command = HPIC_WRITE | HPIC_AINC | HPIC_BMODE | HPIC_ENDIAN;
mutex_lock(&lock);
res = spi_bulkwrite(hDevice, BBM_COMMAND_REG, &command, 1);
res |= spi_bulkwrite(hDevice, BBM_ADDRESS_REG, (u8 *)&addr, 2);
res |= spi_bulkwrite(hDevice, BBM_DATA_REG, (u8 *)&data, 4);
mutex_unlock(&lock);
return res;
}
int fc8050_spi_bulkwrite(HANDLE hDevice, u16 addr, u8 *data, u16 length)
{
int res;
u8 command = HPIC_WRITE | HPIC_AINC | HPIC_BMODE | HPIC_ENDIAN;
mutex_lock(&lock);
res = spi_bulkwrite(hDevice, BBM_COMMAND_REG, &command, 1);
res |= spi_bulkwrite(hDevice, BBM_ADDRESS_REG, (u8 *)&addr, 2);
res |= spi_bulkwrite(hDevice, BBM_DATA_REG, data, length);
mutex_unlock(&lock);
return res;
}
int fc8050_spi_dataread(HANDLE hDevice, u16 addr, u8 *data, u16 length)
{
int res;
u8 command = HPIC_READ | HPIC_BMODE | HPIC_ENDIAN;
mutex_lock(&lock);
res = spi_bulkwrite(hDevice, BBM_COMMAND_REG, &command, 1);
res |= spi_bulkwrite(hDevice, BBM_ADDRESS_REG, (u8 *)&addr, 2);
res |= spi_dataread(hDevice, BBM_DATA_REG, data, length);
mutex_unlock(&lock);
return res;
}
int fc8050_spi_deinit(HANDLE hDevice)
{
print_log(NULL, "fc8050_spi_deinit\n");
return BBM_OK;
}
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