[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>
diff --git a/arch/arm/mach-at91rm9200/devices.c b/arch/arm/mach-at91rm9200/devices.c
index bfe47bd..bf753e3 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 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 @@
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 @@
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 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 @@
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) {}
#endif
+
/* --------------------------------------------------------------------
* NAND / SmartMedia
* -------------------------------------------------------------------- */
@@ -400,22 +416,110 @@
/* --------------------------------------------------------------------
+ * 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 @@
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);