[ARM] 4753/1: [AT91] Use DMA_BIT_MASK

[linux-2.6-omap-h63xx.git] / arch / arm / mach-at91 / at91rm9200_devices.c

diff --git a/arch/arm/mach-at91/at91rm9200_devices.c b/arch/arm/mach-at91/at91rm9200_devices.c
index 2624a4f22d612391aad930a9696795893f654f98..a601c7c1670e65b46121e2c9de3ea1a8f89b1625 100644 (file)
--- a/arch/arm/mach-at91/at91rm9200_devices.c
+++ b/arch/arm/mach-at91/at91rm9200_devices.c
@@ -13,7 +13,9 @@
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 
+#include <linux/dma-mapping.h>
 #include <linux/platform_device.h>
+#include <linux/i2c-gpio.h>
 
 #include <asm/arch/board.h>
 #include <asm/arch/gpio.h>
@@ -22,16 +24,13 @@
 
 #include "generic.h"
 
-#define SZ_512 0x00000200
-#define SZ_256 0x00000100
-#define SZ_16  0x00000010
 
 /* --------------------------------------------------------------------
  *  USB Host
  * -------------------------------------------------------------------- */
 
 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
-static u64 ohci_dmamask = 0xffffffffUL;
+static u64 ohci_dmamask = DMA_BIT_MASK(32);
 static struct at91_usbh_data usbh_data;
 
 static struct resource usbh_resources[] = {
@@ -52,7 +51,7 @@ static struct platform_device at91rm9200_usbh_device = {
        .id             = -1,
        .dev            = {
                                .dma_mask               = &ohci_dmamask,
-                               .coherent_dma_mask      = 0xffffffff,
+                               .coherent_dma_mask      = DMA_BIT_MASK(32),
                                .platform_data          = &usbh_data,
        },
        .resource       = usbh_resources,
@@ -127,7 +126,7 @@ void __init at91_add_device_udc(struct at91_udc_data *data) {}
  * -------------------------------------------------------------------- */
 
 #if defined(CONFIG_ARM_AT91_ETHER) || defined(CONFIG_ARM_AT91_ETHER_MODULE)
-static u64 eth_dmamask = 0xffffffffUL;
+static u64 eth_dmamask = DMA_BIT_MASK(32);
 static struct at91_eth_data eth_data;
 
 static struct resource eth_resources[] = {
@@ -148,7 +147,7 @@ static struct platform_device at91rm9200_eth_device = {
        .id             = -1,
        .dev            = {
                                .dma_mask               = &eth_dmamask,
-                               .coherent_dma_mask      = 0xffffffff,
+                               .coherent_dma_mask      = DMA_BIT_MASK(32),
                                .platform_data          = &eth_data,
        },
        .resource       = eth_resources,
@@ -287,7 +286,7 @@ void __init at91_add_device_cf(struct at91_cf_data *data) {}
  * -------------------------------------------------------------------- */
 
 #if defined(CONFIG_MMC_AT91) || defined(CONFIG_MMC_AT91_MODULE)
-static u64 mmc_dmamask = 0xffffffffUL;
+static u64 mmc_dmamask = DMA_BIT_MASK(32);
 static struct at91_mmc_data mmc_data;
 
 static struct resource mmc_resources[] = {
@@ -308,7 +307,7 @@ static struct platform_device at91rm9200_mmc_device = {
        .id             = -1,
        .dev            = {
                                .dma_mask               = &mmc_dmamask,
-                               .coherent_dma_mask      = 0xffffffff,
+                               .coherent_dma_mask      = DMA_BIT_MASK(32),
                                .platform_data          = &mmc_data,
        },
        .resource       = mmc_resources,
@@ -438,7 +437,40 @@ void __init at91_add_device_nand(struct at91_nand_data *data) {}
  *  TWI (i2c)
  * -------------------------------------------------------------------- */
 
-#if defined(CONFIG_I2C_AT91) || defined(CONFIG_I2C_AT91_MODULE)
+/*
+ * Prefer the GPIO code since the TWI controller isn't robust
+ * (gets overruns and underruns under load) and can only issue
+ * repeated STARTs in one scenario (the driver doesn't yet handle them).
+ */
+#if defined(CONFIG_I2C_GPIO) || defined(CONFIG_I2C_GPIO_MODULE)
+
+static struct i2c_gpio_platform_data pdata = {
+       .sda_pin                = AT91_PIN_PA25,
+       .sda_is_open_drain      = 1,
+       .scl_pin                = AT91_PIN_PA26,
+       .scl_is_open_drain      = 1,
+       .udelay                 = 2,            /* ~100 kHz */
+};
+
+static struct platform_device at91rm9200_twi_device = {
+       .name                   = "i2c-gpio",
+       .id                     = -1,
+       .dev.platform_data      = &pdata,
+};
+
+void __init at91_add_device_i2c(struct i2c_board_info *devices, int nr_devices)
+{
+       at91_set_GPIO_periph(AT91_PIN_PA25, 1);         /* TWD (SDA) */
+       at91_set_multi_drive(AT91_PIN_PA25, 1);
+
+       at91_set_GPIO_periph(AT91_PIN_PA26, 1);         /* TWCK (SCL) */
+       at91_set_multi_drive(AT91_PIN_PA26, 1);
+
+       i2c_register_board_info(0, devices, nr_devices);
+       platform_device_register(&at91rm9200_twi_device);
+}
+
+#elif defined(CONFIG_I2C_AT91) || defined(CONFIG_I2C_AT91_MODULE)
 
 static struct resource twi_resources[] = {
        [0] = {
@@ -460,7 +492,7 @@ static struct platform_device at91rm9200_twi_device = {
        .num_resources  = ARRAY_SIZE(twi_resources),
 };
 
-void __init at91_add_device_i2c(void)
+void __init at91_add_device_i2c(struct i2c_board_info *devices, int nr_devices)
 {
        /* pins used for TWI interface */
        at91_set_A_periph(AT91_PIN_PA25, 0);            /* TWD */
@@ -469,10 +501,11 @@ void __init at91_add_device_i2c(void)
        at91_set_A_periph(AT91_PIN_PA26, 0);            /* TWCK */
        at91_set_multi_drive(AT91_PIN_PA26, 1);
 
+       i2c_register_board_info(0, devices, nr_devices);
        platform_device_register(&at91rm9200_twi_device);
 }
 #else
-void __init at91_add_device_i2c(void) {}
+void __init at91_add_device_i2c(struct i2c_board_info *devices, int nr_devices) {}
 #endif
 
 
@@ -480,8 +513,8 @@ void __init at91_add_device_i2c(void) {}
  *  SPI
  * -------------------------------------------------------------------- */
 
-#if defined(CONFIG_SPI_AT91) || defined(CONFIG_SPI_AT91_MODULE) || defined(CONFIG_AT91_SPI) || defined(CONFIG_AT91_SPI_MODULE)
-static u64 spi_dmamask = 0xffffffffUL;
+#if defined(CONFIG_SPI_ATMEL) || defined(CONFIG_SPI_ATMEL_MODULE)
+static u64 spi_dmamask = DMA_BIT_MASK(32);
 
 static struct resource spi_resources[] = {
        [0] = {
@@ -497,11 +530,11 @@ static struct resource spi_resources[] = {
 };
 
 static struct platform_device at91rm9200_spi_device = {
-       .name           = "at91_spi",
+       .name           = "atmel_spi",
        .id             = 0,
        .dev            = {
                                .dma_mask               = &spi_dmamask,
-                               .coherent_dma_mask      = 0xffffffff,
+                               .coherent_dma_mask      = DMA_BIT_MASK(32),
        },
        .resource       = spi_resources,
        .num_resources  = ARRAY_SIZE(spi_resources),
@@ -525,18 +558,14 @@ void __init at91_add_device_spi(struct spi_board_info *devices, int nr_devices)
                else
                        cs_pin = spi_standard_cs[devices[i].chip_select];
 
-#ifdef CONFIG_SPI_AT91_MANUAL_CS
+               /* enable chip-select pin */
                at91_set_gpio_output(cs_pin, 1);
-#else
-               at91_set_A_periph(cs_pin, 0);
-#endif
 
                /* pass chip-select pin to driver */
                devices[i].controller_data = (void *) cs_pin;
        }
 
        spi_register_board_info(devices, nr_devices);
-       at91_clock_associate("spi_clk", &at91rm9200_spi_device.dev, "spi");
        platform_device_register(&at91rm9200_spi_device);
 }
 #else
@@ -630,12 +659,15 @@ static struct atmel_uart_data dbgu_data = {
        .regs           = (void __iomem *)(AT91_VA_BASE_SYS + AT91_DBGU),
 };
 
+static u64 dbgu_dmamask = DMA_BIT_MASK(32);
+
 static struct platform_device at91rm9200_dbgu_device = {
        .name           = "atmel_usart",
        .id             = 0,
        .dev            = {
-                               .platform_data  = &dbgu_data,
-                               .coherent_dma_mask = 0xffffffff,
+                               .dma_mask               = &dbgu_dmamask,
+                               .coherent_dma_mask      = DMA_BIT_MASK(32),
+                               .platform_data          = &dbgu_data,
        },
        .resource       = dbgu_resources,
        .num_resources  = ARRAY_SIZE(dbgu_resources),
@@ -665,12 +697,15 @@ static struct atmel_uart_data uart0_data = {
        .use_dma_rx     = 1,
 };
 
+static u64 uart0_dmamask = DMA_BIT_MASK(32);
+
 static struct platform_device at91rm9200_uart0_device = {
        .name           = "atmel_usart",
        .id             = 1,
        .dev            = {
-                               .platform_data  = &uart0_data,
-                               .coherent_dma_mask = 0xffffffff,
+                               .dma_mask               = &uart0_dmamask,
+                               .coherent_dma_mask      = DMA_BIT_MASK(32),
+                               .platform_data          = &uart0_data,
        },
        .resource       = uart0_resources,
        .num_resources  = ARRAY_SIZE(uart0_resources),
@@ -707,12 +742,15 @@ static struct atmel_uart_data uart1_data = {
        .use_dma_rx     = 1,
 };
 
+static u64 uart1_dmamask = DMA_BIT_MASK(32);
+
 static struct platform_device at91rm9200_uart1_device = {
        .name           = "atmel_usart",
        .id             = 2,
        .dev            = {
-                               .platform_data  = &uart1_data,
-                               .coherent_dma_mask = 0xffffffff,
+                               .dma_mask               = &uart1_dmamask,
+                               .coherent_dma_mask      = DMA_BIT_MASK(32),
+                               .platform_data          = &uart1_data,
        },
        .resource       = uart1_resources,
        .num_resources  = ARRAY_SIZE(uart1_resources),
@@ -748,12 +786,15 @@ static struct atmel_uart_data uart2_data = {
        .use_dma_rx     = 1,
 };
 
+static u64 uart2_dmamask = DMA_BIT_MASK(32);
+
 static struct platform_device at91rm9200_uart2_device = {
        .name           = "atmel_usart",
        .id             = 3,
        .dev            = {
-                               .platform_data  = &uart2_data,
-                               .coherent_dma_mask = 0xffffffff,
+                               .dma_mask               = &uart2_dmamask,
+                               .coherent_dma_mask      = DMA_BIT_MASK(32),
+                               .platform_data          = &uart2_data,
        },
        .resource       = uart2_resources,
        .num_resources  = ARRAY_SIZE(uart2_resources),
@@ -783,12 +824,15 @@ static struct atmel_uart_data uart3_data = {
        .use_dma_rx     = 1,
 };
 
+static u64 uart3_dmamask = DMA_BIT_MASK(32);
+
 static struct platform_device at91rm9200_uart3_device = {
        .name           = "atmel_usart",
        .id             = 4,
        .dev            = {
-                               .platform_data  = &uart3_data,
-                               .coherent_dma_mask = 0xffffffff,
+                               .dma_mask               = &uart3_dmamask,
+                               .coherent_dma_mask      = DMA_BIT_MASK(32),
+                               .platform_data          = &uart3_data,
        },
        .resource       = uart3_resources,
        .num_resources  = ARRAY_SIZE(uart3_resources),
@@ -800,7 +844,7 @@ static inline void configure_usart3_pins(void)
        at91_set_B_periph(AT91_PIN_PA6, 0);             /* RXD3 */
 }
 
-struct platform_device *at91_uarts[ATMEL_MAX_UART];    /* the UARTs to use */
+static struct platform_device *at91_uarts[ATMEL_MAX_UART];     /* the UARTs to use */
 struct platform_device *atmel_default_console_device;  /* the serial console device */
 
 void __init at91_init_serial(struct at91_uart_config *config)