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spi i.MX: redirect functions to version specific functions 

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2010-10-09 17:05:31 +02:00
parent 3e2efa148e
commit a104d0eaa3
1 changed files with 62 additions and 10 deletions
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72
drivers/spi/imx_spi.c
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@ -26,6 +26,7 @@
#include <asm/io.h>
#include <gpio.h>
#include <mach/spi.h>
#include <mach/generic.h>
#define CSPI_0_0_RXDATA 0x00
#define CSPI_0_0_TXDATA 0x04
@ -64,9 +65,39 @@
#define CSPI_0_0_TEST_LBC (1 << 14)
enum imx_spi_devtype {
#ifdef CONFIG_DRIVER_SPI_IMX1
SPI_IMX_VER_IMX1,
#endif
#ifdef CONFIG_DRIVER_SPI_IMX_0_0
SPI_IMX_VER_0_0,
#endif
#ifdef CONFIG_DRIVER_SPI_IMX_0_4
SPI_IMX_VER_0_4,
#endif
#ifdef CONFIG_DRIVER_SPI_IMX_0_5
SPI_IMX_VER_0_5,
#endif
#ifdef CONFIG_DRIVER_SPI_IMX_0_7
SPI_IMX_VER_0_7,
#endif
#ifdef CONFIG_DRIVER_SPI_IMX_2_3
SPI_IMX_VER_2_3,
#endif
};
struct imx_spi {
struct spi_master master;
int *chipselect;
struct spi_master master;
int *cs_array;
void __iomem *regs;
unsigned int (*xchg_single)(struct imx_spi *imx, u32 data);
void (*chipselect)(struct spi_device *spi, int active);
};
struct spi_imx_devtype_data {
unsigned int (*xchg_single)(struct imx_spi *imx, u32 data);
void (*chipselect)(struct spi_device *spi, int active);
};
static int imx_spi_setup(struct spi_device *spi)
@ -77,8 +108,10 @@ static int imx_spi_setup(struct spi_device *spi)
return 0;
}
static unsigned int spi_xchg_single(ulong base, unsigned int data)
#ifdef CONFIG_DRIVER_SPI_IMX_0_0
static unsigned int cspi_0_0_xchg_single(struct imx_spi *imx, unsigned int data)
{
void __iomem *base = imx->regs;
unsigned int cfg_reg = readl(base + CSPI_0_0_CTRL);
@ -93,13 +126,13 @@ static unsigned int spi_xchg_single(ulong base, unsigned int data)
return readl(base + CSPI_0_0_RXDATA);
}
static void mxc_spi_chipselect(struct spi_device *spi, int is_active)
static void cspi_0_0_chipselect(struct spi_device *spi, int is_active)
{
struct spi_master *master = spi->master;
struct imx_spi *imx = container_of(master, struct imx_spi, master);
ulong base = master->dev->map_base;
unsigned int cs = 0;
int gpio = imx->chipselect[spi->chip_select];
int gpio = imx->cs_array[spi->chip_select];
u32 ctrl_reg;
if (spi->mode & SPI_CS_HIGH)
@ -132,14 +165,15 @@ static void mxc_spi_chipselect(struct spi_device *spi, int is_active)
if (gpio >= 0)
gpio_set_value(gpio, cs);
}
#endif
static int imx_spi_transfer(struct spi_device *spi, struct spi_message *mesg)
{
struct spi_master *master = spi->master;
ulong base = master->dev->map_base;
struct imx_spi *imx = container_of(master, struct imx_spi, master);
struct spi_transfer *t = NULL;
mxc_spi_chipselect(spi, 1);
imx->chipselect(spi, 1);
list_for_each_entry (t, &mesg->transfers, transfer_list) {
const u32 *txbuf = t->tx_buf;
@ -147,21 +181,31 @@ static int imx_spi_transfer(struct spi_device *spi, struct spi_message *mesg)
int i = 0;
while(i < t->len >> 2) {
rxbuf[i] = spi_xchg_single(base, txbuf[i]);
rxbuf[i] = imx->xchg_single(imx, txbuf[i]);
i++;
}
}
mxc_spi_chipselect(spi, 0);
imx->chipselect(spi, 0);
return 0;
}
static struct spi_imx_devtype_data spi_imx_devtype_data[] = {
#ifdef CONFIG_DRIVER_SPI_IMX_0_0
[SPI_IMX_VER_0_0] = {
.chipselect = cspi_0_0_chipselect,
.xchg_single = cspi_0_0_xchg_single,
},
#endif
};
static int imx_spi_probe(struct device_d *dev)
{
struct spi_master *master;
struct imx_spi *imx;
struct spi_imx_master *pdata = dev->platform_data;
enum imx_spi_devtype version;
imx = xzalloc(sizeof(*imx));
@ -171,7 +215,15 @@ static int imx_spi_probe(struct device_d *dev)
master->setup = imx_spi_setup;
master->transfer = imx_spi_transfer;
master->num_chipselect = pdata->num_chipselect;
imx->chipselect = pdata->chipselect;
imx->cs_array = pdata->chipselect;
#ifdef CONFIG_DRIVER_SPI_IMX_0_0
if (cpu_is_mx27())
version = SPI_IMX_VER_0_0;
#endif
imx->chipselect = spi_imx_devtype_data[version].chipselect;
imx->xchg_single = spi_imx_devtype_data[version].xchg_single;
imx->regs = (void __iomem *)dev->map_base;
writel(CSPI_0_0_CTRL_ENABLE | CSPI_0_0_CTRL_MASTER,
dev->map_base + CSPI_0_0_CTRL);