[ARM] 3585/1: AT91RM9200 Platform devices

Patch from Andrew Victor

This patch updates the platform device support for the AT91RM9200.

The changes include:

1. USB Host device renamed to "at91_ohci" since the driver is also
usable on the AT91SAM9261 processor.
2. Enabling multidrive on the USB Device's pullup pin should not be done
for all boards.  Moved into board-specific files.  [Patch from David
Brownell]
3. Move enabling of PCMCIA/Compact Flash pins out of the driver.
4. Added SPI device and resources.
5. Added Watchdog device and resources.  [Patch from David Brownell]
6. Added UART device and resources.
7. The simple devices (watchdog, rtc, i2c) are now automatically
registered and don't have to be registered separately in each
board-specific file. [Patch from David Brownell]

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 389 insertions, 17 deletions

diff --git a/arch/arm/mach-at91rm9200/devices.c b/arch/arm/mach-at91rm9200/devices.c
index bfe47bd6e50..bf753e306a3 100644
--- a/arch/arm/mach-at91rm9200/devices.c
+++ b/arch/arm/mach-at91rm9200/devices.c
@@ -16,9 +16,15 @@
 #include <linux/config.h>
 #include <linux/platform_device.h>
 
+#include <asm/arch/hardware.h>
 #include <asm/arch/board.h>
-#include <asm/arch/pio.h>
+#include <asm/arch/gpio.h>
 
+#include "generic.h"
+
+#define SZ_512  0x00000200
+#define SZ_256  0x00000100
+#define SZ_16   0x00000010
 
 /* --------------------------------------------------------------------
  *  USB Host
@@ -28,7 +34,7 @@
 static u64 ohci_dmamask = 0xffffffffUL;
 static struct at91_usbh_data usbh_data;
 
-static struct resource at91_usbh_resource[] = {
+static struct resource at91_usbh_resources[] = {
         [0] = {
                 .start  = AT91_UHP_BASE,
                 .end    = AT91_UHP_BASE + SZ_1M - 1,
@@ -42,15 +48,15 @@ static struct resource at91_usbh_resource[] = {
 };
 
 static struct platform_device at91rm9200_usbh_device = {
-        .name           = "at91rm9200-ohci",
+        .name           = "at91_ohci",
         .id             = -1,
         .dev            = {
                                 .dma_mask               = &ohci_dmamask,
                                 .coherent_dma_mask      = 0xffffffff,
                                 .platform_data          = &usbh_data,
         },
-        .resource       = at91_usbh_resource,
-        .num_resources  = ARRAY_SIZE(at91_usbh_resource),
+        .resource       = at91_usbh_resources,
+        .num_resources  = ARRAY_SIZE(at91_usbh_resources),
 };
 
 void __init at91_add_device_usbh(struct at91_usbh_data *data)
@@ -74,11 +80,16 @@ void __init at91_add_device_usbh(struct at91_usbh_data *data) {}
 static struct at91_udc_data udc_data;
 
 static struct resource at91_udc_resources[] = {
-        {
+        [0] = {
                 .start  = AT91_BASE_UDP,
                 .end    = AT91_BASE_UDP + SZ_16K - 1,
                 .flags  = IORESOURCE_MEM,
-        }
+        },
+        [1] = {
+                .start  = AT91_ID_UDP,
+                .end    = AT91_ID_UDP,
+                .flags  = IORESOURCE_IRQ,
+        },
 };
 
 static struct platform_device at91rm9200_udc_device = {
@@ -100,10 +111,8 @@ void __init at91_add_device_udc(struct at91_udc_data *data)
                 at91_set_gpio_input(data->vbus_pin, 0);
                 at91_set_deglitch(data->vbus_pin, 1);
         }
-        if (data->pullup_pin) {
+        if (data->pullup_pin)
                 at91_set_gpio_output(data->pullup_pin, 0);
-                at91_set_multi_drive(data->pullup_pin, 1);
-        }
 
         udc_data = *data;
         platform_device_register(&at91rm9200_udc_device);
@@ -197,7 +206,7 @@ static struct at91_cf_data cf_data;
 static struct resource at91_cf_resources[] = {
         [0] = {
                 .start  = AT91_CF_BASE,
-                /* ties up CS4, CS5, and CS6 */
+                /* ties up CS4, CS5 and CS6 */
                 .end    = AT91_CF_BASE + (0x30000000 - 1),
                 .flags  = IORESOURCE_MEM | IORESOURCE_MEM_8AND16BIT,
         },
@@ -231,6 +240,12 @@ void __init at91_add_device_cf(struct at91_cf_data *data)
                 at91_set_gpio_output(data->vcc_pin, 0);
         at91_set_gpio_output(data->rst_pin, 0);
 
+        /* force poweron defaults for these pins ... */
+        at91_set_A_periph(AT91_PIN_PC9, 0);     /* A25/CFRNW */
+        at91_set_A_periph(AT91_PIN_PC10, 0);    /* NCS4/CFCS */
+        at91_set_A_periph(AT91_PIN_PC11, 0);    /* NCS5/CFCE1 */
+        at91_set_A_periph(AT91_PIN_PC12, 0);    /* NCS6/CFCE2 */
+
         cf_data = *data;
         platform_device_register(&at91rm9200_cf_device);
 }
@@ -319,6 +334,7 @@ void __init at91_add_device_mmc(struct at91_mmc_data *data)
 void __init at91_add_device_mmc(struct at91_mmc_data *data) {}
 #endif
 
+
 /* --------------------------------------------------------------------
  *  NAND / SmartMedia
  * -------------------------------------------------------------------- */
@@ -400,22 +416,110 @@ 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;
+
+static struct resource at91_spi_resources[] = {
+        [0] = {
+                .start  = AT91_BASE_SPI,
+                .end    = AT91_BASE_SPI + SZ_16K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = AT91_ID_SPI,
+                .end    = AT91_ID_SPI,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device at91rm9200_spi_device = {
+        .name           = "at91_spi",
+        .id             = 0,
+        .dev            = {
+                .dma_mask               = &spi_dmamask,
+                .coherent_dma_mask      = 0xffffffff,
+        },
+        .resource       = at91_spi_resources,
+        .num_resources  = ARRAY_SIZE(at91_spi_resources),
+};
+
+static const unsigned at91_spi_standard_cs[4] = { AT91_PIN_PA3, AT91_PIN_PA4, AT91_PIN_PA5, AT91_PIN_PA6 };
+
+void __init at91_add_device_spi(struct spi_board_info *devices, int nr_devices)
+{
+        int i;
+        unsigned long cs_pin;
+
+        at91_set_A_periph(AT91_PIN_PA0, 0);     /* MISO */
+        at91_set_A_periph(AT91_PIN_PA1, 0);     /* MOSI */
+        at91_set_A_periph(AT91_PIN_PA2, 0);     /* SPCK */
+
+        /* Enable SPI chip-selects */
+        for (i = 0; i < nr_devices; i++) {
+                if (devices[i].controller_data)
+                        cs_pin = (unsigned long) devices[i].controller_data;
+                else
+                        cs_pin = at91_spi_standard_cs[devices[i].chip_select];
+
+#ifdef CONFIG_SPI_AT91_MANUAL_CS
+                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("spi0_clk", &at91rm9200_spi_device.dev, "spi");
+        platform_device_register(&at91rm9200_spi_device);
+}
+#else
+void __init at91_add_device_spi(struct spi_board_info *devices, int nr_devices) {}
+#endif
+
+
+/* --------------------------------------------------------------------
  *  RTC
  * -------------------------------------------------------------------- */
 
-#if defined(CONFIG_AT91_RTC) || defined(CONFIG_AT91_RTC_MODULE)
+#if defined(CONFIG_RTC_DRV_AT91) || defined(CONFIG_RTC_DRV_AT91_MODULE)
 static struct platform_device at91rm9200_rtc_device = {
         .name           = "at91_rtc",
         .id             = -1,
         .num_resources  = 0,
 };
 
-void __init at91_add_device_rtc(void)
+static void __init at91_add_device_rtc(void)
 {
         platform_device_register(&at91rm9200_rtc_device);
 }
 #else
-void __init at91_add_device_rtc(void) {}
+static void __init at91_add_device_rtc(void) {}
+#endif
+
+
+/* --------------------------------------------------------------------
+ *  Watchdog
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_AT91_WATCHDOG) || defined(CONFIG_AT91_WATCHDOG_MODULE)
+static struct platform_device at91rm9200_wdt_device = {
+        .name           = "at91_wdt",
+        .id             = -1,
+        .num_resources  = 0,
+};
+
+static void __init at91_add_device_watchdog(void)
+{
+        platform_device_register(&at91rm9200_wdt_device);
+}
+#else
+static void __init at91_add_device_watchdog(void) {}
 #endif
 
 
@@ -429,13 +533,281 @@ u8 at91_leds_timer;
 
 void __init at91_init_leds(u8 cpu_led, u8 timer_led)
 {
-        at91_leds_cpu   = cpu_led;
-        at91_leds_timer = timer_led;
+        at91_leds_cpu   = cpu_led;
+        at91_leds_timer = timer_led;
 }
-
 #else
 void __init at91_init_leds(u8 cpu_led, u8 timer_led) {}
 #endif
 
 
+/* --------------------------------------------------------------------
+ *  UART
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_SERIAL_AT91)
+static struct resource dbgu_resources[] = {
+        [0] = {
+                .start  = AT91_VA_BASE_SYS + AT91_DBGU,
+                .end    = AT91_VA_BASE_SYS + AT91_DBGU + SZ_512 - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = AT91_ID_SYS,
+                .end    = AT91_ID_SYS,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct at91_uart_data dbgu_data = {
+        .use_dma_tx     = 0,
+        .use_dma_rx     = 0,            /* DBGU not capable of receive DMA */
+};
+
+static struct platform_device at91rm9200_dbgu_device = {
+        .name           = "at91_usart",
+        .id             = 0,
+        .dev            = {
+                                .platform_data  = &dbgu_data,
+                                .coherent_dma_mask = 0xffffffff,
+        },
+        .resource       = dbgu_resources,
+        .num_resources  = ARRAY_SIZE(dbgu_resources),
+};
+
+static inline void configure_dbgu_pins(void)
+{
+        at91_set_A_periph(AT91_PIN_PA30, 0);            /* DRXD */
+        at91_set_A_periph(AT91_PIN_PA31, 1);            /* DTXD */
+}
+
+static struct resource uart0_resources[] = {
+        [0] = {
+                .start  = AT91_BASE_US0,
+                .end    = AT91_BASE_US0 + SZ_16K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = AT91_ID_US0,
+                .end    = AT91_ID_US0,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct at91_uart_data uart0_data = {
+        .use_dma_tx     = 1,
+        .use_dma_rx     = 1,
+};
+
+static struct platform_device at91rm9200_uart0_device = {
+        .name           = "at91_usart",
+        .id             = 1,
+        .dev            = {
+                                .platform_data  = &uart0_data,
+                                .coherent_dma_mask = 0xffffffff,
+        },
+        .resource       = uart0_resources,
+        .num_resources  = ARRAY_SIZE(uart0_resources),
+};
+
+static inline void configure_usart0_pins(void)
+{
+        at91_set_A_periph(AT91_PIN_PA17, 1);            /* TXD0 */
+        at91_set_A_periph(AT91_PIN_PA18, 0);            /* RXD0 */
+        at91_set_A_periph(AT91_PIN_PA20, 0);            /* CTS0 */
+
+        /*
+         * AT91RM9200 Errata #39 - RTS0 is not internally connected to PA21.
+         *  We need to drive the pin manually.  Default is off (RTS is active low).
+         */
+        at91_set_gpio_output(AT91_PIN_PA21, 1);
+}
+
+static struct resource uart1_resources[] = {
+        [0] = {
+                .start  = AT91_BASE_US1,
+                .end    = AT91_BASE_US1 + SZ_16K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = AT91_ID_US1,
+                .end    = AT91_ID_US1,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct at91_uart_data uart1_data = {
+        .use_dma_tx     = 1,
+        .use_dma_rx     = 1,
+};
+
+static struct platform_device at91rm9200_uart1_device = {
+        .name           = "at91_usart",
+        .id             = 2,
+        .dev            = {
+                                .platform_data  = &uart1_data,
+                                .coherent_dma_mask = 0xffffffff,
+        },
+        .resource       = uart1_resources,
+        .num_resources  = ARRAY_SIZE(uart1_resources),
+};
+
+static inline void configure_usart1_pins(void)
+{
+        at91_set_A_periph(AT91_PIN_PB18, 0);            /* RI1 */
+        at91_set_A_periph(AT91_PIN_PB19, 0);            /* DTR1 */
+        at91_set_A_periph(AT91_PIN_PB20, 1);            /* TXD1 */
+        at91_set_A_periph(AT91_PIN_PB21, 0);            /* RXD1 */
+        at91_set_A_periph(AT91_PIN_PB23, 0);            /* DCD1 */
+        at91_set_A_periph(AT91_PIN_PB24, 0);            /* CTS1 */
+        at91_set_A_periph(AT91_PIN_PB25, 0);            /* DSR1 */
+        at91_set_A_periph(AT91_PIN_PB26, 0);            /* RTS1 */
+}
+
+static struct resource uart2_resources[] = {
+        [0] = {
+                .start  = AT91_BASE_US2,
+                .end    = AT91_BASE_US2 + SZ_16K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = AT91_ID_US2,
+                .end    = AT91_ID_US2,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct at91_uart_data uart2_data = {
+        .use_dma_tx     = 1,
+        .use_dma_rx     = 1,
+};
+
+static struct platform_device at91rm9200_uart2_device = {
+        .name           = "at91_usart",
+        .id             = 3,
+        .dev            = {
+                                .platform_data  = &uart2_data,
+                                .coherent_dma_mask = 0xffffffff,
+        },
+        .resource       = uart2_resources,
+        .num_resources  = ARRAY_SIZE(uart2_resources),
+};
+
+static inline void configure_usart2_pins(void)
+{
+        at91_set_A_periph(AT91_PIN_PA22, 0);            /* RXD2 */
+        at91_set_A_periph(AT91_PIN_PA23, 1);            /* TXD2 */
+}
+
+static struct resource uart3_resources[] = {
+        [0] = {
+                .start  = AT91_BASE_US3,
+                .end    = AT91_BASE_US3 + SZ_16K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = AT91_ID_US3,
+                .end    = AT91_ID_US3,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct at91_uart_data uart3_data = {
+        .use_dma_tx     = 1,
+        .use_dma_rx     = 1,
+};
+
+static struct platform_device at91rm9200_uart3_device = {
+        .name           = "at91_usart",
+        .id             = 4,
+        .dev            = {
+                                .platform_data  = &uart3_data,
+                                .coherent_dma_mask = 0xffffffff,
+        },
+        .resource       = uart3_resources,
+        .num_resources  = ARRAY_SIZE(uart3_resources),
+};
+
+static inline void configure_usart3_pins(void)
+{
+        at91_set_B_periph(AT91_PIN_PA5, 1);             /* TXD3 */
+        at91_set_B_periph(AT91_PIN_PA6, 0);             /* RXD3 */
+}
+
+struct platform_device *at91_uarts[AT91_NR_UART];       /* the UARTs to use */
+struct platform_device *at91_default_console_device;    /* the serial console device */
+
+void __init at91_init_serial(struct at91_uart_config *config)
+{
+        int i;
+
+        /* Fill in list of supported UARTs */
+        for (i = 0; i < config->nr_tty; i++) {
+                switch (config->tty_map[i]) {
+                        case 0:
+                                configure_usart0_pins();
+                                at91_uarts[i] = &at91rm9200_uart0_device;
+                                at91_clock_associate("usart0_clk", &at91rm9200_uart0_device.dev, "usart");
+                                break;
+                        case 1:
+                                configure_usart1_pins();
+                                at91_uarts[i] = &at91rm9200_uart1_device;
+                                at91_clock_associate("usart1_clk", &at91rm9200_uart1_device.dev, "usart");
+                                break;
+                        case 2:
+                                configure_usart2_pins();
+                                at91_uarts[i] = &at91rm9200_uart2_device;
+                                at91_clock_associate("usart2_clk", &at91rm9200_uart2_device.dev, "usart");
+                                break;
+                        case 3:
+                                configure_usart3_pins();
+                                at91_uarts[i] = &at91rm9200_uart3_device;
+                                at91_clock_associate("usart3_clk", &at91rm9200_uart3_device.dev, "usart");
+                                break;
+                        case 4:
+                                configure_dbgu_pins();
+                                at91_uarts[i] = &at91rm9200_dbgu_device;
+                                at91_clock_associate("mck", &at91rm9200_dbgu_device.dev, "usart");
+                                break;
+                        default:
+                                continue;
+                }
+                at91_uarts[i]->id = i;          /* update ID number to mapped ID */
+        }
+
+        /* Set serial console device */
+        if (config->console_tty < AT91_NR_UART)
+                at91_default_console_device = at91_uarts[config->console_tty];
+        if (!at91_default_console_device)
+                printk(KERN_INFO "AT91: No default serial console defined.\n");
+}
+
+void __init at91_add_device_serial(void)
+{
+        int i;
+
+        for (i = 0; i < AT91_NR_UART; i++) {
+                if (at91_uarts[i])
+                        platform_device_register(at91_uarts[i]);
+        }
+}
+#else
+void __init at91_init_serial(struct at91_uart_config *config) {}
+void __init at91_add_device_serial(void) {}
+#endif
+
+
 /* -------------------------------------------------------------------- */
+
+/*
+ * These devices are always present and don't need any board-specific
+ * setup.
+ */
+static int __init at91_add_standard_devices(void)
+{
+        at91_add_device_rtc();
+        at91_add_device_watchdog();
+        return 0;
+}
+
+arch_initcall(at91_add_standard_devices);