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board-2430sdp.c

/*
 * linux/arch/arm/mach-omap2/board-2430sdp.c
 *
 * Copyright (C) 2006 Texas Instruments
 *
 * Modified from mach-omap2/board-generic.c
 *
 * Initial Code : Based on a patch from Komal Shah and Richard Woodruff
 * Updated the Code for 2430 SDP : Syed Mohammed Khasim
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/io.h>

#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/flash.h>

#include <mach/gpio.h>
#include <mach/mux.h>
#include <mach/board.h>
#include <mach/common.h>
#include <mach/gpmc.h>


#define     SDP2430_FLASH_CS  0
#define     SDP2430_SMC91X_CS 5

static struct mtd_partition sdp2430_partitions[] = {
      /* bootloader (U-Boot, etc) in first sector */
      {
            .name       = "bootloader",
            .offset           = 0,
            .size       = SZ_256K,
            .mask_flags = MTD_WRITEABLE,  /* force read-only */
       },
      /* bootloader params in the next sector */
      {
            .name       = "params",
            .offset           = MTDPART_OFS_APPEND,
            .size       = SZ_128K,
            .mask_flags = 0,
       },
      /* kernel */
      {
            .name       = "kernel",
            .offset           = MTDPART_OFS_APPEND,
            .size       = SZ_2M,
            .mask_flags = 0
      },
      /* file system */
      {
            .name       = "filesystem",
            .offset           = MTDPART_OFS_APPEND,
            .size       = MTDPART_SIZ_FULL,
            .mask_flags = 0
      }
};

static struct flash_platform_data sdp2430_flash_data = {
      .map_name   = "cfi_probe",
      .width            = 2,
      .parts            = sdp2430_partitions,
      .nr_parts   = ARRAY_SIZE(sdp2430_partitions),
};

static struct resource sdp2430_flash_resource = {
      .start            = SDP2430_CS0_BASE,
      .end        = SDP2430_CS0_BASE + SZ_64M - 1,
      .flags            = IORESOURCE_MEM,
};

static struct platform_device sdp2430_flash_device = {
      .name       = "omapflash",
      .id         = 0,
      .dev = {
            .platform_data    = &sdp2430_flash_data,
      },
      .num_resources    = 1,
      .resource   = &sdp2430_flash_resource,
};

static struct resource sdp2430_smc91x_resources[] = {
      [0] = {
            .start      = SDP2430_CS0_BASE,
            .end  = SDP2430_CS0_BASE + SZ_64M - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = OMAP_GPIO_IRQ(OMAP24XX_ETHR_GPIO_IRQ),
            .end  = OMAP_GPIO_IRQ(OMAP24XX_ETHR_GPIO_IRQ),
            .flags      = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
      },
};

static struct platform_device sdp2430_smc91x_device = {
      .name       = "smc91x",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(sdp2430_smc91x_resources),
      .resource   = sdp2430_smc91x_resources,
};

static struct platform_device *sdp2430_devices[] __initdata = {
      &sdp2430_smc91x_device,
      &sdp2430_flash_device,
};

static inline void __init sdp2430_init_smc91x(void)
{
      int eth_cs;
      unsigned long cs_mem_base;
      unsigned int rate;
      struct clk *gpmc_fck;

      eth_cs = SDP2430_SMC91X_CS;

      gpmc_fck = clk_get(NULL, "gpmc_fck");     /* Always on ENABLE_ON_INIT */
      if (IS_ERR(gpmc_fck)) {
            WARN_ON(1);
            return;
      }

      clk_enable(gpmc_fck);
      rate = clk_get_rate(gpmc_fck);

      /* Make sure CS1 timings are correct, for 2430 always muxed */
      gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG1, 0x00011200);

      if (rate >= 160000000) {
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG2, 0x001f1f01);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG3, 0x00080803);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG4, 0x1c0b1c0a);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG5, 0x041f1F1F);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG6, 0x000004C4);
      } else if (rate >= 130000000) {
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG2, 0x001f1f00);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG3, 0x00080802);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG4, 0x1C091C09);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG5, 0x041f1F1F);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG6, 0x000004C4);
      } else { /* rate = 100000000 */
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG2, 0x001f1f00);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG3, 0x00080802);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG4, 0x1C091C09);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG5, 0x031A1F1F);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG6, 0x000003C2);
      }

      if (gpmc_cs_request(eth_cs, SZ_16M, &cs_mem_base) < 0) {
            printk(KERN_ERR "Failed to request GPMC mem for smc91x\n");
            goto out;
      }

      sdp2430_smc91x_resources[0].start = cs_mem_base + 0x300;
      sdp2430_smc91x_resources[0].end = cs_mem_base + 0x30f;
      udelay(100);

      if (omap_request_gpio(OMAP24XX_ETHR_GPIO_IRQ) < 0) {
            printk(KERN_ERR "Failed to request GPIO%d for smc91x IRQ\n",
                  OMAP24XX_ETHR_GPIO_IRQ);
            gpmc_cs_free(eth_cs);
            goto out;
      }
      omap_set_gpio_direction(OMAP24XX_ETHR_GPIO_IRQ, 1);

out:
      clk_disable(gpmc_fck);
      clk_put(gpmc_fck);
}

static void __init omap_2430sdp_init_irq(void)
{
      omap2_init_common_hw();
      omap_init_irq();
      omap_gpio_init();
      sdp2430_init_smc91x();
}

static struct omap_uart_config sdp2430_uart_config __initdata = {
      .enabled_uarts = ((1 << 0) | (1 << 1) | (1 << 2)),
};

static struct omap_board_config_kernel sdp2430_config[] = {
      {OMAP_TAG_UART, &sdp2430_uart_config},
};

static void __init omap_2430sdp_init(void)
{
      platform_add_devices(sdp2430_devices, ARRAY_SIZE(sdp2430_devices));
      omap_board_config = sdp2430_config;
      omap_board_config_size = ARRAY_SIZE(sdp2430_config);
      omap_serial_init();
}

static void __init omap_2430sdp_map_io(void)
{
      omap2_set_globals_243x();
      omap2_map_common_io();
}

MACHINE_START(OMAP_2430SDP, "OMAP2430 sdp2430 board")
      /* Maintainer: Syed Khasim - Texas Instruments Inc */
      .phys_io    = 0x48000000,
      .io_pg_offst      = ((0xd8000000) >> 18) & 0xfffc,
      .boot_params      = 0x80000100,
      .map_io           = omap_2430sdp_map_io,
      .init_irq   = omap_2430sdp_init_irq,
      .init_machine     = omap_2430sdp_init,
      .timer            = &omap_timer,
MACHINE_END

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