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spi: ti_qspi: Add AM43xx specifics changes

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Add AM43xx specific changes.

Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
This commit is contained in:
Sourav Poddar 2013-12-21 12:50:09 +05:30 committed by Jagannadha Sutradharudu Teki
parent ea4c7a8321
commit 570533b820
1 changed files with 23 additions and 3 deletions
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26
drivers/spi/ti_qspi.c
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@ -11,6 +11,8 @@
#include <asm/arch/omap.h>
#include <malloc.h>
#include <spi.h>
#include <asm/gpio.h>
#include <asm/omap_gpio.h>
/* ti qpsi register bit masks */
#define QSPI_TIMEOUT 2000000
@ -39,7 +41,8 @@
#define MM_SWITCH 0x01
#define MEM_CS 0x100
#define MEM_CS_UNSELECT 0xfffff0ff
#define MMAP_START_ADDR 0x5c000000
#define MMAP_START_ADDR_DRA 0x5c000000
#define MMAP_START_ADDR_AM43x 0x30000000
#define CORE_CTRL_IO 0x4a002558
#define QSPI_CMD_READ (0x3 << 0)
@ -99,7 +102,11 @@ static void ti_spi_setup_spi_register(struct ti_qspi_slave *qslave)
struct spi_slave *slave = &qslave->slave;
u32 memval = 0;
slave->memory_map = (void *)MMAP_START_ADDR;
#ifdef CONFIG_DRA7XX
slave->memory_map = (void *)MMAP_START_ADDR_DRA;
#else
slave->memory_map = (void *)MMAP_START_ADDR_AM43x;
#endif
memval |= QSPI_CMD_READ | QSPI_SETUP0_NUM_A_BYTES |
QSPI_SETUP0_NUM_D_BYTES_NO_BITS |
@ -165,6 +172,11 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
{
struct ti_qspi_slave *qslave;
#ifdef CONFIG_AM43XX
gpio_request(CONFIG_QSPI_SEL_GPIO, "qspi_gpio");
gpio_direction_output(CONFIG_QSPI_SEL_GPIO, 1);
#endif
qslave = spi_alloc_slave(struct ti_qspi_slave, bus, cs);
if (!qslave) {
printf("SPI_error: Fail to allocate ti_qspi_slave\n");
@ -229,7 +241,11 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
const uchar *txp = dout;
uchar *rxp = din;
uint status;
int timeout, val;
int timeout;
#ifdef CONFIG_DRA7XX
int val;
#endif
debug("spi_xfer: bus:%i cs:%i bitlen:%i words:%i flags:%lx\n",
slave->bus, slave->cs, bitlen, words, flags);
@ -237,15 +253,19 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
/* Setup mmap flags */
if (flags & SPI_XFER_MMAP) {
writel(MM_SWITCH, &qslave->base->memswitch);
#ifdef CONFIG_DRA7XX
val = readl(CORE_CTRL_IO);
val |= MEM_CS;
writel(val, CORE_CTRL_IO);
#endif
return 0;
} else if (flags & SPI_XFER_MMAP_END) {
writel(~MM_SWITCH, &qslave->base->memswitch);
#ifdef CONFIG_DRA7XX
val = readl(CORE_CTRL_IO);
val &= MEM_CS_UNSELECT;
writel(val, CORE_CTRL_IO);
#endif
return 0;
}