[PATCH V2 31/69] ST SPEAr: Adding support for SSP PL022
Viresh KUMAR
viresh.kumar at st.com
Fri Oct 1 07:55:51 EDT 2010
Signed-off-by: Viresh Kumar <viresh.kumar at st.com>
Signed-off-by: Rajeev Kumar <rajeev-dlh.kumar at st.com>
Signed-off-by: Shiraz Hashim <shiraz.hashim at st.com>
---
arch/arm/mach-spear13xx/include/mach/generic.h | 1 +
arch/arm/mach-spear13xx/spear1300_evb.c | 15 +++++
arch/arm/mach-spear13xx/spear13xx.c | 31 ++++++++++
arch/arm/mach-spear3xx/include/mach/generic.h | 2 +
arch/arm/mach-spear3xx/spear300_evb.c | 30 +++++++++
arch/arm/mach-spear3xx/spear310_evb.c | 42 +++++++++++++
arch/arm/mach-spear3xx/spear320.c | 42 +++++++++++++
arch/arm/mach-spear3xx/spear320_evb.c | 14 ++++
arch/arm/mach-spear3xx/spear3xx.c | 31 ++++++++++
arch/arm/mach-spear6xx/include/mach/generic.h | 1 +
arch/arm/mach-spear6xx/include/mach/spear.h | 4 +-
arch/arm/mach-spear6xx/spear600_evb.c | 18 ++++++
arch/arm/mach-spear6xx/spear6xx.c | 68 +++++++++++++++++++++
arch/arm/plat-spear/include/plat/spi.h | 77 ++++++++++++++++++++++++
14 files changed, 374 insertions(+), 2 deletions(-)
create mode 100644 arch/arm/plat-spear/include/plat/spi.h
diff --git a/arch/arm/mach-spear13xx/include/mach/generic.h b/arch/arm/mach-spear13xx/include/mach/generic.h
index 745dd99..7419e0b 100644
--- a/arch/arm/mach-spear13xx/include/mach/generic.h
+++ b/arch/arm/mach-spear13xx/include/mach/generic.h
@@ -30,6 +30,7 @@
/* Add spear13xx family device structure declarations here */
extern struct amba_device spear13xx_gpio_device[];
+extern struct amba_device spear13xx_ssp_device;
extern struct amba_device spear13xx_uart_device;
extern struct platform_device spear13xx_ehci0_device;
extern struct platform_device spear13xx_ehci1_device;
diff --git a/arch/arm/mach-spear13xx/spear1300_evb.c b/arch/arm/mach-spear13xx/spear1300_evb.c
index d8698e0..ba46f61 100644
--- a/arch/arm/mach-spear13xx/spear1300_evb.c
+++ b/arch/arm/mach-spear13xx/spear1300_evb.c
@@ -12,7 +12,10 @@
*/
#include <linux/types.h>
+#include <linux/gpio.h>
#include <linux/mtd/nand.h>
+#include <linux/spi/flash.h>
+#include <linux/spi/spi.h>
#include <mtd/fsmc.h>
#include <asm/mach/arch.h>
#include <asm/mach-types.h>
@@ -22,10 +25,12 @@
#include <plat/keyboard.h>
#include <plat/fsmc.h>
#include <plat/smi.h>
+#include <plat/spi.h>
static struct amba_device *amba_devs[] __initdata = {
&spear13xx_gpio_device[0],
&spear13xx_gpio_device[1],
+ &spear13xx_ssp_device,
&spear13xx_uart_device,
};
@@ -50,6 +55,14 @@ static struct kbd_platform_data kbd_data = {
.rep = 1,
};
+static struct spi_board_info __initdata spi_board_info[] = {
+};
+
+static void __init spi_init(void)
+{
+ spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
+}
+
#ifdef CONFIG_PCIEPORTBUS
/* this function is needed for PCIE host and device driver. Same
* controller can not be programmed as host as well as device. So host
@@ -107,6 +120,8 @@ static void __init spear1300_evb_init(void)
/* Add Amba Devices */
for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
amba_device_register(amba_devs[i], &iomem_resource);
+
+ spi_init();
}
MACHINE_START(SPEAR1300, "ST-SPEAR1300-EVB")
diff --git a/arch/arm/mach-spear13xx/spear13xx.c b/arch/arm/mach-spear13xx/spear13xx.c
index 25a1964..6455ebb 100644
--- a/arch/arm/mach-spear13xx/spear13xx.c
+++ b/arch/arm/mach-spear13xx/spear13xx.c
@@ -12,6 +12,7 @@
*/
#include <linux/types.h>
+#include <linux/amba/pl022.h>
#include <linux/amba/pl061.h>
#include <linux/ptrace.h>
#include <linux/io.h>
@@ -64,6 +65,36 @@ struct amba_device spear13xx_gpio_device[] = {
}
};
+/* ssp device registeration */
+static struct pl022_ssp_controller ssp_platform_data = {
+ .bus_id = 0,
+ .enable_dma = 0,
+ /*
+ * This is number of spi devices that can be connected to spi. There are
+ * two type of chipselects on which slave devices can work. One is chip
+ * select provided by spi masters other is controlled through external
+ * gpio's. We can't use chipselect provided from spi master (because as
+ * soon as FIFO becomes empty, CS is disabled and transfer ends). So
+ * this number now depends on number of gpios available for spi. each
+ * slave on each master requires a separate gpio pin.
+ */
+ .num_chipselect = 2,
+};
+
+struct amba_device spear13xx_ssp_device = {
+ .dev = {
+ .coherent_dma_mask = ~0,
+ .init_name = "ssp-pl022",
+ .platform_data = &ssp_platform_data,
+ },
+ .res = {
+ .start = SPEAR13XX_SSP_BASE,
+ .end = SPEAR13XX_SSP_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ .irq = {IRQ_SSP, NO_IRQ},
+};
+
/* uart device registeration */
struct amba_device spear13xx_uart_device = {
.dev = {
diff --git a/arch/arm/mach-spear3xx/include/mach/generic.h b/arch/arm/mach-spear3xx/include/mach/generic.h
index 6aac229..04ce8700 100644
--- a/arch/arm/mach-spear3xx/include/mach/generic.h
+++ b/arch/arm/mach-spear3xx/include/mach/generic.h
@@ -32,6 +32,7 @@
/* Add spear3xx family device structure declarations here */
extern struct amba_device gpio_device;
+extern struct amba_device ssp0_device;
extern struct amba_device uart_device;
extern struct amba_device wdt_device;
extern struct platform_device ehci_device;
@@ -176,6 +177,7 @@ void __init spear310_init(void);
#elif defined(CONFIG_MACH_SPEAR320)
/* Add spear320 machine device structure declarations here */
extern struct amba_device clcd_device;
+extern struct amba_device ssp_device[];
extern struct platform_device i2c1_device;
extern struct platform_device nand_device;
extern struct platform_device plgpio_device;
diff --git a/arch/arm/mach-spear3xx/spear300_evb.c b/arch/arm/mach-spear3xx/spear300_evb.c
index 41ad013..c702cc3 100644
--- a/arch/arm/mach-spear3xx/spear300_evb.c
+++ b/arch/arm/mach-spear3xx/spear300_evb.c
@@ -15,11 +15,15 @@
#include <mtd/fsmc.h>
#include <asm/mach/arch.h>
#include <asm/mach-types.h>
+#include <linux/spi/flash.h>
+#include <linux/spi/spi.h>
#include <mach/generic.h>
+#include <mach/gpio.h>
#include <mach/spear.h>
#include <plat/fsmc.h>
#include <plat/keyboard.h>
#include <plat/smi.h>
+#include <plat/spi.h>
/* padmux devices to enable */
static struct pmx_dev *pmx_devs[] = {
@@ -40,6 +44,7 @@ static struct pmx_dev *pmx_devs[] = {
static struct amba_device *amba_devs[] __initdata = {
/* spear3xx specific devices */
&gpio_device,
+ &ssp0_device,
&uart_device,
&wdt_device,
@@ -71,6 +76,29 @@ static struct kbd_platform_data kbd_data = {
.rep = 1,
};
+/* spi board information */
+/* spi0 flash Chip Select Control function, controlled by gpio pin mentioned */
+DECLARE_SPI_CS_CONTROL(0, flash, RAS_GPIO_3);
+/* spi0 flash Chip Info structure */
+DECLARE_SPI_CHIP_INFO(0, flash, spi0_flash_cs_control);
+
+static struct spi_board_info __initdata spi_board_info[] = {
+ /* spi0 board info */
+ {
+ .modalias = "m25p80",
+ .controller_data = &spi0_flash_chip_info,
+ .max_speed_hz = 400000,
+ .bus_num = 0,
+ .chip_select = 1,
+ .mode = 0,
+ }
+};
+
+static void __init spi_init(void)
+{
+ spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
+}
+
static void __init spear300_evb_init(void)
{
unsigned int i;
@@ -102,6 +130,8 @@ static void __init spear300_evb_init(void)
/* Add Amba Devices */
for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
amba_device_register(amba_devs[i], &iomem_resource);
+
+ spi_init();
}
MACHINE_START(SPEAR300, "ST-SPEAR300-EVB")
diff --git a/arch/arm/mach-spear3xx/spear310_evb.c b/arch/arm/mach-spear3xx/spear310_evb.c
index 857afae..bff90b3 100644
--- a/arch/arm/mach-spear3xx/spear310_evb.c
+++ b/arch/arm/mach-spear3xx/spear310_evb.c
@@ -15,10 +15,14 @@
#include <mtd/fsmc.h>
#include <asm/mach/arch.h>
#include <asm/mach-types.h>
+#include <linux/spi/flash.h>
+#include <linux/spi/spi.h>
#include <mach/generic.h>
+#include <mach/gpio.h>
#include <mach/spear.h>
#include <plat/fsmc.h>
#include <plat/smi.h>
+#include <plat/spi.h>
/* padmux devices to enable */
static struct pmx_dev *pmx_devs[] = {
@@ -47,6 +51,7 @@ static struct pmx_dev *pmx_devs[] = {
static struct amba_device *amba_devs[] __initdata = {
/* spear3xx specific devices */
&gpio_device,
+ &ssp0_device,
&uart_device,
&wdt_device,
@@ -67,6 +72,41 @@ static struct platform_device *plat_devs[] __initdata = {
&plgpio_device,
};
+/* spi board information */
+/* spi0 flash Chip Select Control function, controlled by gpio pin mentioned */
+DECLARE_SPI_CS_CONTROL(0, flash, BASIC_GPIO_3);
+/* spi0 flash Chip Info structure */
+DECLARE_SPI_CHIP_INFO(0, flash, spi0_flash_cs_control);
+
+/* spi0 spidev Chip Select Control function, controlled by gpio pin mentioned */
+DECLARE_SPI_CS_CONTROL(0, dev, BASIC_GPIO_4);
+/* spi0 spidev Chip Info structure */
+DECLARE_SPI_CHIP_INFO(0, dev, spi0_dev_cs_control);
+
+static struct spi_board_info __initdata spi_board_info[] = {
+ /* spi0 board info */
+ {
+ .modalias = "spidev",
+ .controller_data = &spi0_dev_chip_info,
+ .max_speed_hz = 10000000,
+ .bus_num = 0,
+ .chip_select = 0,
+ .mode = 0,
+ }, {
+ .modalias = "m25p80",
+ .controller_data = &spi0_flash_chip_info,
+ .max_speed_hz = 400000,
+ .bus_num = 0,
+ .chip_select = 1,
+ .mode = 0,
+ }
+};
+
+static void __init spi_init(void)
+{
+ spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
+}
+
static void __init spear310_evb_init(void)
{
unsigned int i;
@@ -95,6 +135,8 @@ static void __init spear310_evb_init(void)
/* Add Amba Devices */
for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
amba_device_register(amba_devs[i], &iomem_resource);
+
+ spi_init();
}
MACHINE_START(SPEAR310, "ST-SPEAR310-EVB")
diff --git a/arch/arm/mach-spear3xx/spear320.c b/arch/arm/mach-spear3xx/spear320.c
index 3def755..f87cc97 100644
--- a/arch/arm/mach-spear3xx/spear320.c
+++ b/arch/arm/mach-spear3xx/spear320.c
@@ -11,6 +11,7 @@
* warranty of any kind, whether express or implied.
*/
+#include <linux/amba/pl022.h>
#include <linux/ptrace.h>
#include <mtd/fsmc.h>
#include <asm/irq.h>
@@ -403,6 +404,47 @@ struct amba_device clcd_device = {
.irq = {VIRQ_CLCD, NO_IRQ},
};
+/* ssp device registeration */
+static struct pl022_ssp_controller ssp_platform_data[] = {
+ {
+ .bus_id = 1,
+ .enable_dma = 0,
+ .num_chipselect = 2,
+ }, {
+ .bus_id = 2,
+ .enable_dma = 0,
+ .num_chipselect = 2,
+ }
+};
+
+struct amba_device ssp_device[] = {
+ {
+ .dev = {
+ .coherent_dma_mask = ~0,
+ .init_name = "ssp-pl022.1",
+ .platform_data = &ssp_platform_data[0],
+ },
+ .res = {
+ .start = SPEAR320_SSP0_BASE,
+ .end = SPEAR320_SSP0_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ .irq = {VIRQ_SSP1, NO_IRQ},
+ }, {
+ .dev = {
+ .coherent_dma_mask = ~0,
+ .init_name = "ssp-pl022.2",
+ .platform_data = &ssp_platform_data[1],
+ },
+ .res = {
+ .start = SPEAR320_SSP1_BASE,
+ .end = SPEAR320_SSP1_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ .irq = {VIRQ_SSP2, NO_IRQ},
+ }
+};
+
/* plgpio device registeration */
static struct plgpio_platform_data plgpio_plat_data = {
.gpio_base = 8,
diff --git a/arch/arm/mach-spear3xx/spear320_evb.c b/arch/arm/mach-spear3xx/spear320_evb.c
index 3a066bb..dcca84e 100644
--- a/arch/arm/mach-spear3xx/spear320_evb.c
+++ b/arch/arm/mach-spear3xx/spear320_evb.c
@@ -15,10 +15,14 @@
#include <mtd/fsmc.h>
#include <asm/mach/arch.h>
#include <asm/mach-types.h>
+#include <linux/spi/flash.h>
+#include <linux/spi/spi.h>
#include <mach/generic.h>
+#include <mach/gpio.h>
#include <mach/spear.h>
#include <plat/fsmc.h>
#include <plat/smi.h>
+#include <plat/spi.h>
/* padmux devices to enable */
static struct pmx_dev *pmx_devs[] = {
@@ -67,6 +71,14 @@ static struct platform_device *plat_devs[] __initdata = {
&pwm_device,
};
+static struct spi_board_info __initdata spi_board_info[] = {
+};
+
+static void __init spi_init(void)
+{
+ spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
+}
+
static void __init spear320_evb_init(void)
{
unsigned int i;
@@ -95,6 +107,8 @@ static void __init spear320_evb_init(void)
/* Add Amba Devices */
for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
amba_device_register(amba_devs[i], &iomem_resource);
+
+ spi_init();
}
MACHINE_START(SPEAR320, "ST-SPEAR320-EVB")
diff --git a/arch/arm/mach-spear3xx/spear3xx.c b/arch/arm/mach-spear3xx/spear3xx.c
index 88a6bd4..b4c3ad7 100644
--- a/arch/arm/mach-spear3xx/spear3xx.c
+++ b/arch/arm/mach-spear3xx/spear3xx.c
@@ -12,6 +12,7 @@
*/
#include <linux/types.h>
+#include <linux/amba/pl022.h>
#include <linux/amba/pl061.h>
#include <linux/ptrace.h>
#include <linux/io.h>
@@ -41,6 +42,36 @@ struct amba_device gpio_device = {
.irq = {IRQ_BASIC_GPIO, NO_IRQ},
};
+/* ssp device registeration */
+static struct pl022_ssp_controller ssp_platform_data = {
+ .bus_id = 0,
+ .enable_dma = 0,
+ /*
+ * This is number of spi devices that can be connected to spi. There are
+ * two type of chipselects on which slave devices can work. One is chip
+ * select provided by spi masters other is controlled through external
+ * gpio's. We can't use chipselect provided from spi master (because as
+ * soon as FIFO becomes empty, CS is disabled and transfer ends). So
+ * this number now depends on number of gpios available for spi. each
+ * slave on each master requires a separate gpio pin.
+ */
+ .num_chipselect = 2,
+};
+
+struct amba_device ssp0_device = {
+ .dev = {
+ .coherent_dma_mask = ~0,
+ .init_name = "ssp-pl022.0",
+ .platform_data = &ssp_platform_data,
+ },
+ .res = {
+ .start = SPEAR3XX_ICM1_SSP_BASE,
+ .end = SPEAR3XX_ICM1_SSP_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ .irq = {IRQ_SSP, NO_IRQ},
+};
+
/* uart device registeration */
struct amba_device uart_device = {
.dev = {
diff --git a/arch/arm/mach-spear6xx/include/mach/generic.h b/arch/arm/mach-spear6xx/include/mach/generic.h
index ff90419..dd29298 100644
--- a/arch/arm/mach-spear6xx/include/mach/generic.h
+++ b/arch/arm/mach-spear6xx/include/mach/generic.h
@@ -31,6 +31,7 @@
/* Add spear6xx family device structure declarations here */
extern struct amba_device clcd_device;
extern struct amba_device gpio_device[];
+extern struct amba_device ssp_device[];
extern struct amba_device uart_device[];
extern struct amba_device wdt_device;
extern struct platform_device ehci0_device;
diff --git a/arch/arm/mach-spear6xx/include/mach/spear.h b/arch/arm/mach-spear6xx/include/mach/spear.h
index a835f5b..31486e5 100644
--- a/arch/arm/mach-spear6xx/include/mach/spear.h
+++ b/arch/arm/mach-spear6xx/include/mach/spear.h
@@ -68,8 +68,8 @@
#define SPEAR6XX_ICM2_GPIO_BASE 0xD8100000
#define SPEAR6XX_ICM2_GPIO_SIZE 0x00080000
-#define SPEAR6XX_ICM2_SPI2_BASE 0xD8180000
-#define SPEAR6XX_ICM2_SPI2_SIZE 0x00080000
+#define SPEAR6XX_ICM2_SSP2_BASE 0xD8180000
+#define SPEAR6XX_ICM2_SSP2_SIZE 0x00080000
#define SPEAR6XX_ICM2_ADC_BASE 0xD8200000
#define SPEAR6XX_ICM2_ADC_SIZE 0x00080000
diff --git a/arch/arm/mach-spear6xx/spear600_evb.c b/arch/arm/mach-spear6xx/spear600_evb.c
index f3b1fb4..a98d7d6 100644
--- a/arch/arm/mach-spear6xx/spear600_evb.c
+++ b/arch/arm/mach-spear6xx/spear600_evb.c
@@ -15,16 +15,24 @@
#include <mtd/fsmc.h>
#include <asm/mach/arch.h>
#include <asm/mach-types.h>
+#include <linux/gpio.h>
+#include <linux/spi/flash.h>
+#include <linux/spi/spi.h>
#include <mach/generic.h>
+#include <mach/gpio.h>
#include <mach/spear.h>
#include <plat/fsmc.h>
#include <plat/smi.h>
+#include <plat/spi.h>
static struct amba_device *amba_devs[] __initdata = {
&clcd_device,
&gpio_device[0],
&gpio_device[1],
&gpio_device[2],
+ &ssp_device[0],
+ &ssp_device[1],
+ &ssp_device[2],
&uart_device[0],
&uart_device[1],
&wdt_device,
@@ -41,6 +49,14 @@ static struct platform_device *plat_devs[] __initdata = {
&smi_device,
};
+static struct spi_board_info __initdata spi_board_info[] = {
+};
+
+static void __init spi_init(void)
+{
+ spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
+}
+
static void __init spear600_evb_init(void)
{
unsigned int i;
@@ -64,6 +80,8 @@ static void __init spear600_evb_init(void)
/* Add Amba Devices */
for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
amba_device_register(amba_devs[i], &iomem_resource);
+
+ spi_init();
}
diff --git a/arch/arm/mach-spear6xx/spear6xx.c b/arch/arm/mach-spear6xx/spear6xx.c
index cc4fd39..82788e1 100644
--- a/arch/arm/mach-spear6xx/spear6xx.c
+++ b/arch/arm/mach-spear6xx/spear6xx.c
@@ -12,6 +12,7 @@
*/
#include <linux/types.h>
+#include <linux/amba/pl022.h>
#include <linux/amba/pl061.h>
#include <linux/ptrace.h>
#include <linux/io.h>
@@ -41,6 +42,73 @@ struct amba_device clcd_device = {
.irq = {IRQ_BASIC_CLCD, NO_IRQ},
};
+/* ssp device registeration */
+static struct pl022_ssp_controller ssp_platform_data[] = {
+ {
+ .bus_id = 0,
+ .enable_dma = 0,
+ /*
+ * This is number of spi devices that can be connected to spi.
+ * There are two type of chipselects on which slave devices can
+ * work. One is chip select provided by spi masters other is
+ * controlled through external gpio's. We can't use chipselect
+ * provided from spi master (because as soon as FIFO becomes
+ * empty, CS is disabled and transfer ends). So this number now
+ * depends on number of gpios available for spi. each slave on
+ * each master requires a separate gpio pin.
+ */
+ .num_chipselect = 2,
+ }, {
+ .bus_id = 1,
+ .enable_dma = 0,
+ .num_chipselect = 2,
+ }, {
+ .bus_id = 2,
+ .enable_dma = 0,
+ .num_chipselect = 2,
+ }
+};
+
+struct amba_device ssp_device[] = {
+ {
+ .dev = {
+ .coherent_dma_mask = ~0,
+ .init_name = "ssp-pl022.0",
+ .platform_data = &ssp_platform_data[0],
+ },
+ .res = {
+ .start = SPEAR6XX_ICM1_SSP0_BASE,
+ .end = SPEAR6XX_ICM1_SSP0_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ .irq = {IRQ_SSP_1, NO_IRQ},
+ }, {
+ .dev = {
+ .coherent_dma_mask = ~0,
+ .init_name = "ssp-pl022.1",
+ .platform_data = &ssp_platform_data[1],
+ },
+ .res = {
+ .start = SPEAR6XX_ICM1_SSP1_BASE,
+ .end = SPEAR6XX_ICM1_SSP1_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ .irq = {IRQ_SSP_2, NO_IRQ},
+ }, {
+ .dev = {
+ .coherent_dma_mask = ~0,
+ .init_name = "ssp-pl022.2",
+ .platform_data = &ssp_platform_data[2],
+ },
+ .res = {
+ .start = SPEAR6XX_ICM2_SSP2_BASE,
+ .end = SPEAR6XX_ICM2_SSP2_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ .irq = {IRQ_APPL_SSP, NO_IRQ},
+ }
+};
+
/* uart device registeration */
struct amba_device uart_device[] = {
{
diff --git a/arch/arm/plat-spear/include/plat/spi.h b/arch/arm/plat-spear/include/plat/spi.h
new file mode 100644
index 0000000..a2c53f3
--- /dev/null
+++ b/arch/arm/plat-spear/include/plat/spi.h
@@ -0,0 +1,77 @@
+/*
+ * arch/arm/plat-spear/include/plat/spi.h
+ *
+ * SPI board specific definitions common to multiple boards on multiple
+ * machines.
+ *
+ * Copyright (C) 2010 ST Microelectronics
+ * Viresh Kumar<viresh.kumar at st.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __PLAT_SPI_H
+#define __PLAT_SPI_H
+
+#include <linux/amba/pl022.h>
+#include <linux/gpio.h>
+
+/* spi board information */
+static inline int spi_cs_gpio_request(u32 gpio_pin)
+{
+ int ret;
+
+ ret = gpio_request(gpio_pin, "SPI_CS");
+ if (ret < 0) {
+ printk(KERN_ERR "SPI: gpio:%d request fail\n", gpio_pin);
+ return ret;
+ } else {
+ ret = gpio_direction_output(gpio_pin, 1);
+ if (ret) {
+ printk(KERN_ERR "SPI: gpio:%d direction set fail\n",
+ gpio_pin);
+ return ret;
+ }
+ }
+ return 0;
+}
+
+/* This will define cs_control function for a specific spi slave */
+#define DECLARE_SPI_CS_CONTROL(id, type, gpio) \
+static void spi##id##_##type##_cs_control(u32 control) \
+{ \
+ static int count, ret; \
+ \
+ if (unlikely(!count)) { \
+ count++; \
+ ret = spi_cs_gpio_request(gpio); \
+ } \
+ \
+ if (!ret) \
+ gpio_set_value(gpio, control); \
+}
+
+/* This will define CHIP_INFO structure for a specific spi slave */
+#define DECLARE_SPI_CHIP_INFO(id, type, chip_select_control) \
+struct pl022_config_chip spi##id##_##type##_chip_info = { \
+ .lbm = LOOPBACK_DISABLED, \
+ .iface = SSP_INTERFACE_MOTOROLA_SPI, \
+ .hierarchy = SSP_MASTER, \
+ .slave_tx_disable = 0, \
+ .endian_tx = SSP_TX_LSB, \
+ .endian_rx = SSP_RX_LSB, \
+ .data_size = SSP_DATA_BITS_8, \
+ .com_mode = INTERRUPT_TRANSFER, \
+ .rx_lev_trig = SSP_RX_1_OR_MORE_ELEM, \
+ .tx_lev_trig = SSP_TX_1_OR_MORE_EMPTY_LOC, \
+ .clk_phase = SSP_CLK_SECOND_EDGE, \
+ .clk_pol = SSP_CLK_POL_IDLE_LOW, \
+ .cs_control = chip_select_control, \
+};
+
+#define DECLARE_SPI_CHIP_INFO_NULL_ID(chip_select_control) \
+DECLARE_SPI_CHIP_INFO(, chip_select_control)
+
+#endif /* __PLAT_SPI_H */
--
1.7.2.2
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