Logo Search packages:      
Sourcecode: linux version File versions  Download package

at91rm9200_devices.c

/*
 * arch/arm/mach-at91/at91rm9200_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 <asm/arch/board.h>
#include <asm/arch/gpio.h>
#include <asm/arch/at91rm9200.h>
#include <asm/arch/at91rm9200_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      = AT91RM9200_UHP_BASE,
            .end  = AT91RM9200_UHP_BASE + SZ_1M - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91RM9200_ID_UHP,
            .end  = AT91RM9200_ID_UHP,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device at91rm9200_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(&at91rm9200_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      = AT91RM9200_BASE_UDP,
            .end  = AT91RM9200_BASE_UDP + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91RM9200_ID_UDP,
            .end  = AT91RM9200_ID_UDP,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device at91rm9200_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)
{
      if (!data)
            return;

      if (data->vbus_pin) {
            at91_set_gpio_input(data->vbus_pin, 0);
            at91_set_deglitch(data->vbus_pin, 1);
      }
      if (data->pullup_pin)
            at91_set_gpio_output(data->pullup_pin, 0);

      udc_data = *data;
      platform_device_register(&at91rm9200_udc_device);
}
#else
void __init at91_add_device_udc(struct at91_udc_data *data) {}
#endif


/* --------------------------------------------------------------------
 *  Ethernet
 * -------------------------------------------------------------------- */

#if defined(CONFIG_ARM_AT91_ETHER) || defined(CONFIG_ARM_AT91_ETHER_MODULE)
static u64 eth_dmamask = 0xffffffffUL;
static struct at91_eth_data eth_data;

static struct resource eth_resources[] = {
      [0] = {
            .start      = AT91_VA_BASE_EMAC,
            .end  = AT91_VA_BASE_EMAC + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91RM9200_ID_EMAC,
            .end  = AT91RM9200_ID_EMAC,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device at91rm9200_eth_device = {
      .name       = "at91_ether",
      .id         = -1,
      .dev        = {
                        .dma_mask         = &eth_dmamask,
                        .coherent_dma_mask      = 0xffffffff,
                        .platform_data          = &eth_data,
      },
      .resource   = eth_resources,
      .num_resources    = ARRAY_SIZE(eth_resources),
};

void __init at91_add_device_eth(struct at91_eth_data *data)
{
      if (!data)
            return;

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

      /* Pins used for MII and RMII */
      at91_set_A_periph(AT91_PIN_PA16, 0);      /* EMDIO */
      at91_set_A_periph(AT91_PIN_PA15, 0);      /* EMDC */
      at91_set_A_periph(AT91_PIN_PA14, 0);      /* ERXER */
      at91_set_A_periph(AT91_PIN_PA13, 0);      /* ERX1 */
      at91_set_A_periph(AT91_PIN_PA12, 0);      /* ERX0 */
      at91_set_A_periph(AT91_PIN_PA11, 0);      /* ECRS_ECRSDV */
      at91_set_A_periph(AT91_PIN_PA10, 0);      /* ETX1 */
      at91_set_A_periph(AT91_PIN_PA9, 0); /* ETX0 */
      at91_set_A_periph(AT91_PIN_PA8, 0); /* ETXEN */
      at91_set_A_periph(AT91_PIN_PA7, 0); /* ETXCK_EREFCK */

      if (!data->is_rmii) {
            at91_set_B_periph(AT91_PIN_PB19, 0);      /* ERXCK */
            at91_set_B_periph(AT91_PIN_PB18, 0);      /* ECOL */
            at91_set_B_periph(AT91_PIN_PB17, 0);      /* ERXDV */
            at91_set_B_periph(AT91_PIN_PB16, 0);      /* ERX3 */
            at91_set_B_periph(AT91_PIN_PB15, 0);      /* ERX2 */
            at91_set_B_periph(AT91_PIN_PB14, 0);      /* ETXER */
            at91_set_B_periph(AT91_PIN_PB13, 0);      /* ETX3 */
            at91_set_B_periph(AT91_PIN_PB12, 0);      /* ETX2 */
      }

      eth_data = *data;
      platform_device_register(&at91rm9200_eth_device);
}
#else
void __init at91_add_device_eth(struct at91_eth_data *data) {}
#endif


/* --------------------------------------------------------------------
 *  Compact Flash / PCMCIA
 * -------------------------------------------------------------------- */

#if defined(CONFIG_AT91_CF) || defined(CONFIG_AT91_CF_MODULE)
static struct at91_cf_data cf_data;

#define CF_BASE         AT91_CHIPSELECT_4

static struct resource cf_resources[] = {
      [0] = {
            .start      = CF_BASE,
            /* ties up CS4, CS5 and CS6 */
            .end  = CF_BASE + (0x30000000 - 1),
            .flags      = IORESOURCE_MEM | IORESOURCE_MEM_8AND16BIT,
      },
};

static struct platform_device at91rm9200_cf_device = {
      .name       = "at91_cf",
      .id         = -1,
      .dev        = {
                        .platform_data          = &cf_data,
      },
      .resource   = cf_resources,
      .num_resources    = ARRAY_SIZE(cf_resources),
};

void __init at91_add_device_cf(struct at91_cf_data *data)
{
      unsigned int csa;

      if (!data)
            return;

      data->chipselect = 4;         /* can only use EBI ChipSelect 4 */

      /* CF takes over CS4, CS5, CS6 */
      csa = at91_sys_read(AT91_EBI_CSA);
      at91_sys_write(AT91_EBI_CSA, csa | AT91_EBI_CS4A_SMC_COMPACTFLASH);

      /*
       * Static memory controller timing adjustments.
       * REVISIT:  these timings are in terms of MCK cycles, so
       * when MCK changes (cpufreq etc) so must these values...
       */
      at91_sys_write(AT91_SMC_CSR(4),
                          AT91_SMC_ACSS_STD
                        | AT91_SMC_DBW_16
                        | AT91_SMC_BAT
                        | AT91_SMC_WSEN
                        | AT91_SMC_NWS_(32)     /* wait states */
                        | AT91_SMC_RWSETUP_(6)  /* setup time */
                        | AT91_SMC_RWHOLD_(4)   /* hold time */
      );

      /* input/irq */
      if (data->irq_pin) {
            at91_set_gpio_input(data->irq_pin, 1);
            at91_set_deglitch(data->irq_pin, 1);
      }
      at91_set_gpio_input(data->det_pin, 1);
      at91_set_deglitch(data->det_pin, 1);

      /* outputs, initially off */
      if (data->vcc_pin)
            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 */

      /* nWAIT is _not_ a default setting */
      at91_set_A_periph(AT91_PIN_PC6, 1); /* nWAIT */

      cf_data = *data;
      platform_device_register(&at91rm9200_cf_device);
}
#else
void __init at91_add_device_cf(struct at91_cf_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      = AT91RM9200_BASE_MCI,
            .end  = AT91RM9200_BASE_MCI + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91RM9200_ID_MCI,
            .end  = AT91RM9200_ID_MCI,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device at91rm9200_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_A_periph(AT91_PIN_PA27, 0);

      if (data->slot_b) {
            /* CMD */
            at91_set_B_periph(AT91_PIN_PA8, 1);

            /* DAT0, maybe DAT1..DAT3 */
            at91_set_B_periph(AT91_PIN_PA9, 1);
            if (data->wire4) {
                  at91_set_B_periph(AT91_PIN_PA10, 1);
                  at91_set_B_periph(AT91_PIN_PA11, 1);
                  at91_set_B_periph(AT91_PIN_PA12, 1);
            }
      } else {
            /* CMD */
            at91_set_A_periph(AT91_PIN_PA28, 1);

            /* DAT0, maybe DAT1..DAT3 */
            at91_set_A_periph(AT91_PIN_PA29, 1);
            if (data->wire4) {
                  at91_set_B_periph(AT91_PIN_PB3, 1);
                  at91_set_B_periph(AT91_PIN_PB4, 1);
                  at91_set_B_periph(AT91_PIN_PB5, 1);
            }
      }

      mmc_data = *data;
      platform_device_register(&at91rm9200_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_8M - 1,
            .flags      = IORESOURCE_MEM,
      }
};

static struct platform_device at91rm9200_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 int csa;

      if (!data)
            return;

      /* enable the address range of CS3 */
      csa = at91_sys_read(AT91_EBI_CSA);
      at91_sys_write(AT91_EBI_CSA, csa | AT91_EBI_CS3A_SMC_SMARTMEDIA);

      /* set the bus interface characteristics */
      at91_sys_write(AT91_SMC_CSR(3), AT91_SMC_ACSS_STD | AT91_SMC_DBW_8 | AT91_SMC_WSEN
            | AT91_SMC_NWS_(5)
            | AT91_SMC_TDF_(1)
            | AT91_SMC_RWSETUP_(0)  /* tDS Data Set up Time 30 - ns */
            | AT91_SMC_RWHOLD_(1)   /* tDH Data Hold Time 20 - ns */
      );

      /* 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_PC1, 0);       /* SMOE */
      at91_set_A_periph(AT91_PIN_PC3, 0);       /* SMWE */

      nand_data = *data;
      platform_device_register(&at91rm9200_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_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] = {
            .start      = AT91RM9200_BASE_TWI,
            .end  = AT91RM9200_BASE_TWI + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91RM9200_ID_TWI,
            .end  = AT91RM9200_ID_TWI,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device at91rm9200_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_PA25, 0);            /* TWD */
      at91_set_multi_drive(AT91_PIN_PA25, 1);

      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(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 spi_resources[] = {
      [0] = {
            .start      = AT91RM9200_BASE_SPI,
            .end  = AT91RM9200_BASE_SPI + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91RM9200_ID_SPI,
            .end  = AT91RM9200_ID_SPI,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device at91rm9200_spi_device = {
      .name       = "atmel_spi",
      .id         = 0,
      .dev        = {
                        .dma_mask         = &spi_dmamask,
                        .coherent_dma_mask      = 0xffffffff,
      },
      .resource   = spi_resources,
      .num_resources    = ARRAY_SIZE(spi_resources),
};

static const unsigned 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 = spi_standard_cs[devices[i].chip_select];

            /* 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);
      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_RTC_DRV_AT91RM9200) || defined(CONFIG_RTC_DRV_AT91RM9200_MODULE)
static struct platform_device at91rm9200_rtc_device = {
      .name       = "at91_rtc",
      .id         = -1,
      .num_resources    = 0,
};

static void __init at91_add_device_rtc(void)
{
      platform_device_register(&at91rm9200_rtc_device);
}
#else
static void __init at91_add_device_rtc(void) {}
#endif


/* --------------------------------------------------------------------
 *  Watchdog
 * -------------------------------------------------------------------- */

#if defined(CONFIG_AT91RM9200_WATCHDOG) || defined(CONFIG_AT91RM9200_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


/* --------------------------------------------------------------------
 *  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 at91rm9200_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_PA30, 0);            /* DRXD */
      at91_set_A_periph(AT91_PIN_PA31, 1);            /* DTXD */
}

static struct resource uart0_resources[] = {
      [0] = {
            .start      = AT91RM9200_BASE_US0,
            .end  = AT91RM9200_BASE_US0 + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91RM9200_ID_US0,
            .end  = AT91RM9200_ID_US0,
            .flags      = IORESOURCE_IRQ,
      },
};

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

static struct platform_device at91rm9200_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_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      = AT91RM9200_BASE_US1,
            .end  = AT91RM9200_BASE_US1 + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91RM9200_ID_US1,
            .end  = AT91RM9200_ID_US1,
            .flags      = IORESOURCE_IRQ,
      },
};

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

static struct platform_device at91rm9200_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_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      = AT91RM9200_BASE_US2,
            .end  = AT91RM9200_BASE_US2 + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91RM9200_ID_US2,
            .end  = AT91RM9200_ID_US2,
            .flags      = IORESOURCE_IRQ,
      },
};

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

static struct platform_device at91rm9200_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_PA22, 0);            /* RXD2 */
      at91_set_A_periph(AT91_PIN_PA23, 1);            /* TXD2 */
}

static struct resource uart3_resources[] = {
      [0] = {
            .start      = AT91RM9200_BASE_US3,
            .end  = AT91RM9200_BASE_US3 + SZ_16K - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = AT91RM9200_ID_US3,
            .end  = AT91RM9200_ID_US3,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct atmel_uart_data uart3_data = {
      .use_dma_tx = 1,
      .use_dma_rx = 1,
};

static struct platform_device at91rm9200_uart3_device = {
      .name       = "atmel_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[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] = &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 < 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)
{
      at91_add_device_rtc();
      at91_add_device_watchdog();
      return 0;
}

arch_initcall(at91_add_standard_devices);

Generated by  Doxygen 1.6.0   Back to index