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board-zoom-debugboard.c

/*
 * Copyright (C) 2009 Texas Instruments Inc.
 * Mikkel Christensen <mlc@ti.com>
 *
 * 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/gpio.h>
#include <linux/serial_8250.h>
#include <linux/smsc911x.h>
#include <linux/interrupt.h>

#include <plat/gpmc.h>

#include <mach/board-zoom.h>

#define ZOOM_SMSC911X_CS      7
#define ZOOM_SMSC911X_GPIO    158
#define ZOOM_QUADUART_CS      3
#define ZOOM_QUADUART_GPIO    102
#define QUART_CLK       1843200
#define DEBUG_BASE            0x08000000
#define ZOOM_ETHR_START DEBUG_BASE

static struct resource zoom_smsc911x_resources[] = {
      [0] = {
            .start      = ZOOM_ETHR_START,
            .end  = ZOOM_ETHR_START + SZ_4K,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .flags      = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
      },
};

static struct smsc911x_platform_config zoom_smsc911x_config = {
      .irq_polarity     = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
      .irq_type   = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
      .flags            = SMSC911X_USE_32BIT,
      .phy_interface    = PHY_INTERFACE_MODE_MII,
};

static struct platform_device zoom_smsc911x_device = {
      .name       = "smsc911x",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(zoom_smsc911x_resources),
      .resource   = zoom_smsc911x_resources,
      .dev        = {
            .platform_data = &zoom_smsc911x_config,
      },
};

static inline void __init zoom_init_smsc911x(void)
{
      int eth_cs;
      unsigned long cs_mem_base;
      int eth_gpio = 0;

      eth_cs = ZOOM_SMSC911X_CS;

      if (gpmc_cs_request(eth_cs, SZ_16M, &cs_mem_base) < 0) {
            printk(KERN_ERR "Failed to request GPMC mem for smsc911x\n");
            return;
      }

      zoom_smsc911x_resources[0].start = cs_mem_base + 0x0;
      zoom_smsc911x_resources[0].end   = cs_mem_base + 0xff;

      eth_gpio = ZOOM_SMSC911X_GPIO;

      zoom_smsc911x_resources[1].start = OMAP_GPIO_IRQ(eth_gpio);

      if (gpio_request(eth_gpio, "smsc911x irq") < 0) {
            printk(KERN_ERR "Failed to request GPIO%d for smsc911x IRQ\n",
                        eth_gpio);
            return;
      }
      gpio_direction_input(eth_gpio);
}

static struct plat_serial8250_port serial_platform_data[] = {
      {
            .mapbase    = ZOOM_UART_BASE,
            .irq        = OMAP_GPIO_IRQ(102),
            .flags            = UPF_BOOT_AUTOCONF|UPF_IOREMAP|UPF_SHARE_IRQ,
            .irqflags   = IRQF_SHARED | IRQF_TRIGGER_RISING,
            .iotype           = UPIO_MEM,
            .regshift   = 1,
            .uartclk    = QUART_CLK,
      }, {
            .flags            = 0
      }
};

static struct platform_device zoom_debugboard_serial_device = {
      .name             = "serial8250",
      .id               = PLAT8250_DEV_PLATFORM,
      .dev              = {
            .platform_data    = serial_platform_data,
      },
};

static inline void __init zoom_init_quaduart(void)
{
      int quart_cs;
      unsigned long cs_mem_base;
      int quart_gpio = 0;

      quart_cs = ZOOM_QUADUART_CS;

      if (gpmc_cs_request(quart_cs, SZ_1M, &cs_mem_base) < 0) {
            printk(KERN_ERR "Failed to request GPMC mem"
                        "for Quad UART(TL16CP754C)\n");
            return;
      }

      quart_gpio = ZOOM_QUADUART_GPIO;

      if (gpio_request(quart_gpio, "TL16CP754C GPIO") < 0) {
            printk(KERN_ERR "Failed to request GPIO%d for TL16CP754C\n",
                                                quart_gpio);
            return;
      }
      gpio_direction_input(quart_gpio);
}

static inline int omap_zoom_debugboard_detect(void)
{
      int debug_board_detect = 0;
      int ret = 1;

      debug_board_detect = ZOOM_SMSC911X_GPIO;

      if (gpio_request(debug_board_detect, "Zoom debug board detect") < 0) {
            printk(KERN_ERR "Failed to request GPIO%d for Zoom debug"
            "board detect\n", debug_board_detect);
            return 0;
      }
      gpio_direction_input(debug_board_detect);

      if (!gpio_get_value(debug_board_detect)) {
            ret = 0;
      }
      gpio_free(debug_board_detect);
      return ret;
}

static struct platform_device *zoom_devices[] __initdata = {
      &zoom_smsc911x_device,
      &zoom_debugboard_serial_device,
};

int __init zoom_debugboard_init(void)
{
      if (!omap_zoom_debugboard_detect())
            return 0;

      zoom_init_smsc911x();
      zoom_init_quaduart();
      return platform_add_devices(zoom_devices, ARRAY_SIZE(zoom_devices));
}

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