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at91sam9261_devices.c

/*
 * arch/arm/mach-at91/at91sam9261_devices.c
 *
 *  Copyright (C) 2005 Thibaut VARENE <varenet@parisc-linux.org>
 *  Copyright (C) 2005 David Brownell
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 */
#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#include <linux/platform_device.h>
#include <linux/i2c-gpio.h>

#include <linux/fb.h>
#include <video/atmel_lcdc.h>

#include <asm/arch/board.h>
#include <asm/arch/gpio.h>
#include <asm/arch/at91sam9261.h>
#include <asm/arch/at91sam9261_matrix.h>
#include <asm/arch/at91sam926x_mc.h>

#include "generic.h"


/* --------------------------------------------------------------------
 *  USB Host
 * -------------------------------------------------------------------- */

#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
static u64 ohci_dmamask = 0xffffffffUL;
static struct at91_usbh_data usbh_data;

static struct resource usbh_resources[] = {
      [0] = {
            .start      = AT91SAM9261_UHP_BASE,
            .end  = AT91SAM9261_UHP_BASE + SZ_1M - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91SAM9261_ID_UHP,
            .end  = AT91SAM9261_ID_UHP,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device at91sam9261_usbh_device = {
      .name       = "at91_ohci",
      .id         = -1,
      .dev        = {
                        .dma_mask         = &ohci_dmamask,
                        .coherent_dma_mask      = 0xffffffff,
                        .platform_data          = &usbh_data,
      },
      .resource   = usbh_resources,
      .num_resources    = ARRAY_SIZE(usbh_resources),
};

void __init at91_add_device_usbh(struct at91_usbh_data *data)
{
      if (!data)
            return;

      usbh_data = *data;
      platform_device_register(&at91sam9261_usbh_device);
}
#else
void __init at91_add_device_usbh(struct at91_usbh_data *data) {}
#endif


/* --------------------------------------------------------------------
 *  USB Device (Gadget)
 * -------------------------------------------------------------------- */

#ifdef CONFIG_USB_GADGET_AT91
static struct at91_udc_data udc_data;

static struct resource udc_resources[] = {
      [0] = {
            .start      = AT91SAM9261_BASE_UDP,
            .end  = AT91SAM9261_BASE_UDP + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91SAM9261_ID_UDP,
            .end  = AT91SAM9261_ID_UDP,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device at91sam9261_udc_device = {
      .name       = "at91_udc",
      .id         = -1,
      .dev        = {
                        .platform_data          = &udc_data,
      },
      .resource   = udc_resources,
      .num_resources    = ARRAY_SIZE(udc_resources),
};

void __init at91_add_device_udc(struct at91_udc_data *data)
{
      unsigned long x;

      if (!data)
            return;

      if (data->vbus_pin) {
            at91_set_gpio_input(data->vbus_pin, 0);
            at91_set_deglitch(data->vbus_pin, 1);
      }

      /* Pullup pin is handled internally */
      x = at91_sys_read(AT91_MATRIX_USBPUCR);
      at91_sys_write(AT91_MATRIX_USBPUCR, x | AT91_MATRIX_USBPUCR_PUON);

      udc_data = *data;
      platform_device_register(&at91sam9261_udc_device);
}
#else
void __init at91_add_device_udc(struct at91_udc_data *data) {}
#endif

/* --------------------------------------------------------------------
 *  MMC / SD
 * -------------------------------------------------------------------- */

#if defined(CONFIG_MMC_AT91) || defined(CONFIG_MMC_AT91_MODULE)
static u64 mmc_dmamask = 0xffffffffUL;
static struct at91_mmc_data mmc_data;

static struct resource mmc_resources[] = {
      [0] = {
            .start      = AT91SAM9261_BASE_MCI,
            .end  = AT91SAM9261_BASE_MCI + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91SAM9261_ID_MCI,
            .end  = AT91SAM9261_ID_MCI,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device at91sam9261_mmc_device = {
      .name       = "at91_mci",
      .id         = -1,
      .dev        = {
                        .dma_mask         = &mmc_dmamask,
                        .coherent_dma_mask      = 0xffffffff,
                        .platform_data          = &mmc_data,
      },
      .resource   = mmc_resources,
      .num_resources    = ARRAY_SIZE(mmc_resources),
};

void __init at91_add_device_mmc(short mmc_id, struct at91_mmc_data *data)
{
      if (!data)
            return;

      /* input/irq */
      if (data->det_pin) {
            at91_set_gpio_input(data->det_pin, 1);
            at91_set_deglitch(data->det_pin, 1);
      }
      if (data->wp_pin)
            at91_set_gpio_input(data->wp_pin, 1);
      if (data->vcc_pin)
            at91_set_gpio_output(data->vcc_pin, 0);

      /* CLK */
      at91_set_B_periph(AT91_PIN_PA2, 0);

      /* CMD */
      at91_set_B_periph(AT91_PIN_PA1, 1);

      /* DAT0, maybe DAT1..DAT3 */
      at91_set_B_periph(AT91_PIN_PA0, 1);
      if (data->wire4) {
            at91_set_B_periph(AT91_PIN_PA4, 1);
            at91_set_B_periph(AT91_PIN_PA5, 1);
            at91_set_B_periph(AT91_PIN_PA6, 1);
      }

      mmc_data = *data;
      platform_device_register(&at91sam9261_mmc_device);
}
#else
void __init at91_add_device_mmc(short mmc_id, struct at91_mmc_data *data) {}
#endif


/* --------------------------------------------------------------------
 *  NAND / SmartMedia
 * -------------------------------------------------------------------- */

#if defined(CONFIG_MTD_NAND_AT91) || defined(CONFIG_MTD_NAND_AT91_MODULE)
static struct at91_nand_data nand_data;

#define NAND_BASE AT91_CHIPSELECT_3

static struct resource nand_resources[] = {
      {
            .start      = NAND_BASE,
            .end  = NAND_BASE + SZ_256M - 1,
            .flags      = IORESOURCE_MEM,
      }
};

static struct platform_device at91_nand_device = {
      .name       = "at91_nand",
      .id         = -1,
      .dev        = {
                        .platform_data    = &nand_data,
      },
      .resource   = nand_resources,
      .num_resources    = ARRAY_SIZE(nand_resources),
};

void __init at91_add_device_nand(struct at91_nand_data *data)
{
      unsigned long csa, mode;

      if (!data)
            return;

      csa = at91_sys_read(AT91_MATRIX_EBICSA);
      at91_sys_write(AT91_MATRIX_EBICSA, csa | AT91_MATRIX_CS3A_SMC);

      /* set the bus interface characteristics */
      at91_sys_write(AT91_SMC_SETUP(3), AT91_SMC_NWESETUP_(0) | AT91_SMC_NCS_WRSETUP_(0)
                  | AT91_SMC_NRDSETUP_(0) | AT91_SMC_NCS_RDSETUP_(0));

      at91_sys_write(AT91_SMC_PULSE(3), AT91_SMC_NWEPULSE_(2) | AT91_SMC_NCS_WRPULSE_(5)
                  | AT91_SMC_NRDPULSE_(2) | AT91_SMC_NCS_RDPULSE_(5));

      at91_sys_write(AT91_SMC_CYCLE(3), AT91_SMC_NWECYCLE_(7) | AT91_SMC_NRDCYCLE_(7));

      if (data->bus_width_16)
            mode = AT91_SMC_DBW_16;
      else
            mode = AT91_SMC_DBW_8;
      at91_sys_write(AT91_SMC_MODE(3), mode | AT91_SMC_READMODE | AT91_SMC_WRITEMODE | AT91_SMC_EXNWMODE_DISABLE | AT91_SMC_TDF_(1));

      /* enable pin */
      if (data->enable_pin)
            at91_set_gpio_output(data->enable_pin, 1);

      /* ready/busy pin */
      if (data->rdy_pin)
            at91_set_gpio_input(data->rdy_pin, 1);

      /* card detect pin */
      if (data->det_pin)
            at91_set_gpio_input(data->det_pin, 1);

      at91_set_A_periph(AT91_PIN_PC0, 0);       /* NANDOE */
      at91_set_A_periph(AT91_PIN_PC1, 0);       /* NANDWE */

      nand_data = *data;
      platform_device_register(&at91_nand_device);
}

#else
void __init at91_add_device_nand(struct at91_nand_data *data) {}
#endif


/* --------------------------------------------------------------------
 *  TWI (i2c)
 * -------------------------------------------------------------------- */

/*
 * 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_PA7,
      .sda_is_open_drain      = 1,
      .scl_pin          = AT91_PIN_PA8,
      .scl_is_open_drain      = 1,
      .udelay                 = 2,        /* ~100 kHz */
};

static struct platform_device at91sam9261_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_PA7, 1);          /* TWD (SDA) */
      at91_set_multi_drive(AT91_PIN_PA7, 1);

      at91_set_GPIO_periph(AT91_PIN_PA8, 1);          /* TWCK (SCL) */
      at91_set_multi_drive(AT91_PIN_PA8, 1);

      i2c_register_board_info(0, devices, nr_devices);
      platform_device_register(&at91sam9261_twi_device);
}

#elif defined(CONFIG_I2C_AT91) || defined(CONFIG_I2C_AT91_MODULE)

static struct resource twi_resources[] = {
      [0] = {
            .start      = AT91SAM9261_BASE_TWI,
            .end  = AT91SAM9261_BASE_TWI + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91SAM9261_ID_TWI,
            .end  = AT91SAM9261_ID_TWI,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device at91sam9261_twi_device = {
      .name       = "at91_i2c",
      .id         = -1,
      .resource   = twi_resources,
      .num_resources    = ARRAY_SIZE(twi_resources),
};

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_PA7, 0);       /* TWD */
      at91_set_multi_drive(AT91_PIN_PA7, 1);

      at91_set_A_periph(AT91_PIN_PA8, 0);       /* TWCK */
      at91_set_multi_drive(AT91_PIN_PA8, 1);

      i2c_register_board_info(0, devices, nr_devices);
      platform_device_register(&at91sam9261_twi_device);
}
#else
void __init at91_add_device_i2c(struct i2c_board_info *devices, int nr_devices) {}
#endif


/* --------------------------------------------------------------------
 *  SPI
 * -------------------------------------------------------------------- */

#if defined(CONFIG_SPI_ATMEL) || defined(CONFIG_SPI_ATMEL_MODULE)
static u64 spi_dmamask = 0xffffffffUL;

static struct resource spi0_resources[] = {
      [0] = {
            .start      = AT91SAM9261_BASE_SPI0,
            .end  = AT91SAM9261_BASE_SPI0 + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91SAM9261_ID_SPI0,
            .end  = AT91SAM9261_ID_SPI0,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device at91sam9261_spi0_device = {
      .name       = "atmel_spi",
      .id         = 0,
      .dev        = {
                        .dma_mask         = &spi_dmamask,
                        .coherent_dma_mask      = 0xffffffff,
      },
      .resource   = spi0_resources,
      .num_resources    = ARRAY_SIZE(spi0_resources),
};

static const unsigned spi0_standard_cs[4] = { AT91_PIN_PA3, AT91_PIN_PA4, AT91_PIN_PA5, AT91_PIN_PA6 };

static struct resource spi1_resources[] = {
      [0] = {
            .start      = AT91SAM9261_BASE_SPI1,
            .end  = AT91SAM9261_BASE_SPI1 + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91SAM9261_ID_SPI1,
            .end  = AT91SAM9261_ID_SPI1,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device at91sam9261_spi1_device = {
      .name       = "atmel_spi",
      .id         = 1,
      .dev        = {
                        .dma_mask         = &spi_dmamask,
                        .coherent_dma_mask      = 0xffffffff,
      },
      .resource   = spi1_resources,
      .num_resources    = ARRAY_SIZE(spi1_resources),
};

static const unsigned spi1_standard_cs[4] = { AT91_PIN_PB28, AT91_PIN_PA24, AT91_PIN_PA25, AT91_PIN_PA26 };

void __init at91_add_device_spi(struct spi_board_info *devices, int nr_devices)
{
      int i;
      unsigned long cs_pin;
      short enable_spi0 = 0;
      short enable_spi1 = 0;

      /* Choose SPI chip-selects */
      for (i = 0; i < nr_devices; i++) {
            if (devices[i].controller_data)
                  cs_pin = (unsigned long) devices[i].controller_data;
            else if (devices[i].bus_num == 0)
                  cs_pin = spi0_standard_cs[devices[i].chip_select];
            else
                  cs_pin = spi1_standard_cs[devices[i].chip_select];

            if (devices[i].bus_num == 0)
                  enable_spi0 = 1;
            else
                  enable_spi1 = 1;

            /* enable chip-select pin */
            at91_set_gpio_output(cs_pin, 1);

            /* pass chip-select pin to driver */
            devices[i].controller_data = (void *) cs_pin;
      }

      spi_register_board_info(devices, nr_devices);

      /* Configure SPI bus(es) */
      if (enable_spi0) {
            at91_set_A_periph(AT91_PIN_PA0, 0); /* SPI0_MISO */
            at91_set_A_periph(AT91_PIN_PA1, 0); /* SPI0_MOSI */
            at91_set_A_periph(AT91_PIN_PA2, 0); /* SPI0_SPCK */

            at91_clock_associate("spi0_clk", &at91sam9261_spi0_device.dev, "spi_clk");
            platform_device_register(&at91sam9261_spi0_device);
      }
      if (enable_spi1) {
            at91_set_A_periph(AT91_PIN_PB30, 0);      /* SPI1_MISO */
            at91_set_A_periph(AT91_PIN_PB31, 0);      /* SPI1_MOSI */
            at91_set_A_periph(AT91_PIN_PB29, 0);      /* SPI1_SPCK */

            at91_clock_associate("spi1_clk", &at91sam9261_spi1_device.dev, "spi_clk");
            platform_device_register(&at91sam9261_spi1_device);
      }
}
#else
void __init at91_add_device_spi(struct spi_board_info *devices, int nr_devices) {}
#endif


/* --------------------------------------------------------------------
 *  LCD Controller
 * -------------------------------------------------------------------- */

#if defined(CONFIG_FB_ATMEL) || defined(CONFIG_FB_ATMEL_MODULE)
static u64 lcdc_dmamask = 0xffffffffUL;
static struct atmel_lcdfb_info lcdc_data;

static struct resource lcdc_resources[] = {
      [0] = {
            .start      = AT91SAM9261_LCDC_BASE,
            .end  = AT91SAM9261_LCDC_BASE + SZ_4K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91SAM9261_ID_LCDC,
            .end  = AT91SAM9261_ID_LCDC,
            .flags      = IORESOURCE_IRQ,
      },
#if defined(CONFIG_FB_INTSRAM)
      [2] = {
            .start      = AT91SAM9261_SRAM_BASE,
            .end  = AT91SAM9261_SRAM_BASE + AT91SAM9261_SRAM_SIZE - 1,
            .flags      = IORESOURCE_MEM,
      },
#endif
};

static struct platform_device at91_lcdc_device = {
      .name       = "atmel_lcdfb",
      .id         = 0,
      .dev        = {
                        .dma_mask         = &lcdc_dmamask,
                        .coherent_dma_mask      = 0xffffffff,
                        .platform_data          = &lcdc_data,
      },
      .resource   = lcdc_resources,
      .num_resources    = ARRAY_SIZE(lcdc_resources),
};

void __init at91_add_device_lcdc(struct atmel_lcdfb_info *data)
{
      if (!data) {
            return;
      }

      at91_set_A_periph(AT91_PIN_PB1, 0); /* LCDHSYNC */
      at91_set_A_periph(AT91_PIN_PB2, 0); /* LCDDOTCK */
      at91_set_A_periph(AT91_PIN_PB3, 0); /* LCDDEN */
      at91_set_A_periph(AT91_PIN_PB4, 0); /* LCDCC */
      at91_set_A_periph(AT91_PIN_PB7, 0); /* LCDD2 */
      at91_set_A_periph(AT91_PIN_PB8, 0); /* LCDD3 */
      at91_set_A_periph(AT91_PIN_PB9, 0); /* LCDD4 */
      at91_set_A_periph(AT91_PIN_PB10, 0);      /* LCDD5 */
      at91_set_A_periph(AT91_PIN_PB11, 0);      /* LCDD6 */
      at91_set_A_periph(AT91_PIN_PB12, 0);      /* LCDD7 */
      at91_set_A_periph(AT91_PIN_PB15, 0);      /* LCDD10 */
      at91_set_A_periph(AT91_PIN_PB16, 0);      /* LCDD11 */
      at91_set_A_periph(AT91_PIN_PB17, 0);      /* LCDD12 */
      at91_set_A_periph(AT91_PIN_PB18, 0);      /* LCDD13 */
      at91_set_A_periph(AT91_PIN_PB19, 0);      /* LCDD14 */
      at91_set_A_periph(AT91_PIN_PB20, 0);      /* LCDD15 */
      at91_set_B_periph(AT91_PIN_PB23, 0);      /* LCDD18 */
      at91_set_B_periph(AT91_PIN_PB24, 0);      /* LCDD19 */
      at91_set_B_periph(AT91_PIN_PB25, 0);      /* LCDD20 */
      at91_set_B_periph(AT91_PIN_PB26, 0);      /* LCDD21 */
      at91_set_B_periph(AT91_PIN_PB27, 0);      /* LCDD22 */
      at91_set_B_periph(AT91_PIN_PB28, 0);      /* LCDD23 */

      lcdc_data = *data;
      platform_device_register(&at91_lcdc_device);
}
#else
void __init at91_add_device_lcdc(struct atmel_lcdfb_info *data) {}
#endif


/* --------------------------------------------------------------------
 *  LEDs
 * -------------------------------------------------------------------- */

#if defined(CONFIG_LEDS)
u8 at91_leds_cpu;
u8 at91_leds_timer;

void __init at91_init_leds(u8 cpu_led, u8 timer_led)
{
      /* Enable GPIO to access the LEDs */
      at91_set_gpio_output(cpu_led, 1);
      at91_set_gpio_output(timer_led, 1);

      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_ATMEL)
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 atmel_uart_data dbgu_data = {
      .use_dma_tx = 0,
      .use_dma_rx = 0,        /* DBGU not capable of receive DMA */
      .regs       = (void __iomem *)(AT91_VA_BASE_SYS + AT91_DBGU),
};

static struct platform_device at91sam9261_dbgu_device = {
      .name       = "atmel_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_PA9, 0);       /* DRXD */
      at91_set_A_periph(AT91_PIN_PA10, 1);            /* DTXD */
}

static struct resource uart0_resources[] = {
      [0] = {
            .start      = AT91SAM9261_BASE_US0,
            .end  = AT91SAM9261_BASE_US0 + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91SAM9261_ID_US0,
            .end  = AT91SAM9261_ID_US0,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct atmel_uart_data uart0_data = {
      .use_dma_tx = 1,
      .use_dma_rx = 1,
};

static struct platform_device at91sam9261_uart0_device = {
      .name       = "atmel_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_PC8, 1);       /* TXD0 */
      at91_set_A_periph(AT91_PIN_PC9, 0);       /* RXD0 */
      at91_set_A_periph(AT91_PIN_PC10, 0);            /* RTS0 */
      at91_set_A_periph(AT91_PIN_PC11, 0);            /* CTS0 */
}

static struct resource uart1_resources[] = {
      [0] = {
            .start      = AT91SAM9261_BASE_US1,
            .end  = AT91SAM9261_BASE_US1 + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91SAM9261_ID_US1,
            .end  = AT91SAM9261_ID_US1,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct atmel_uart_data uart1_data = {
      .use_dma_tx = 1,
      .use_dma_rx = 1,
};

static struct platform_device at91sam9261_uart1_device = {
      .name       = "atmel_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_PC12, 1);            /* TXD1 */
      at91_set_A_periph(AT91_PIN_PC13, 0);            /* RXD1 */
}

static struct resource uart2_resources[] = {
      [0] = {
            .start      = AT91SAM9261_BASE_US2,
            .end  = AT91SAM9261_BASE_US2 + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91SAM9261_ID_US2,
            .end  = AT91SAM9261_ID_US2,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct atmel_uart_data uart2_data = {
      .use_dma_tx = 1,
      .use_dma_rx = 1,
};

static struct platform_device at91sam9261_uart2_device = {
      .name       = "atmel_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_PC15, 0);            /* RXD2 */
      at91_set_A_periph(AT91_PIN_PC14, 1);            /* TXD2 */
}

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)
{
      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] = &at91sam9261_uart0_device;
                        at91_clock_associate("usart0_clk", &at91sam9261_uart0_device.dev, "usart");
                        break;
                  case 1:
                        configure_usart1_pins();
                        at91_uarts[i] = &at91sam9261_uart1_device;
                        at91_clock_associate("usart1_clk", &at91sam9261_uart1_device.dev, "usart");
                        break;
                  case 2:
                        configure_usart2_pins();
                        at91_uarts[i] = &at91sam9261_uart2_device;
                        at91_clock_associate("usart2_clk", &at91sam9261_uart2_device.dev, "usart");
                        break;
                  case 3:
                        configure_dbgu_pins();
                        at91_uarts[i] = &at91sam9261_dbgu_device;
                        at91_clock_associate("mck", &at91sam9261_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 < ATMEL_MAX_UART)
            atmel_default_console_device = at91_uarts[config->console_tty];
      if (!atmel_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 < ATMEL_MAX_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)
{
      return 0;
}

arch_initcall(at91_add_standard_devices);

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