arch/arm/mach-omap2/gpmc-smsc911x.c

   1 /*
   2  * linux/arch/arm/mach-omap2/gpmc-smsc911x.c
   3  *
   4  * Copyright (C) 2009 Li-Pro.Net
   5  * Stephan Linz <linz@li-pro.net>
   6  *
   7  * Modified from linux/arch/arm/mach-omap2/gpmc-smc91x.c
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13 #define pr_fmt(fmt) "%s: " fmt, __func__
  14
  15 #include <linux/kernel.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/gpio.h>
  18 #include <linux/delay.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/io.h>
  21 #include <linux/smsc911x.h>
  22
  23 #include <plat/board.h>
  24 #include <plat/gpmc.h>
  25 #include <plat/gpmc-smsc911x.h>
  26
  27 static struct resource gpmc_smsc911x_resources[] = {
  28         [0] = {
  29                 .flags          = IORESOURCE_MEM,
  30         },
  31         [1] = {
  32                 .flags          = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
  33         },
  34 };
  35
  36 static struct smsc911x_platform_config gpmc_smsc911x_config = {
  37         .phy_interface  = PHY_INTERFACE_MODE_MII,
  38         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
  39         .irq_type       = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
  40 };
  41
  42 /*
  43  * Initialize smsc911x device connected to the GPMC. Note that we
  44  * assume that pin multiplexing is done in the board-*.c file,
  45  * or in the bootloader.
  46  */
  47 void __init gpmc_smsc911x_init(struct omap_smsc911x_platform_data *gpmc_cfg)
  48 {
  49         struct platform_device *pdev;
  50         unsigned long cs_mem_base;
  51         int ret;
  52
  53         if (gpmc_cs_request(gpmc_cfg->cs, SZ_16M, &cs_mem_base) < 0) {
  54                 pr_err("Failed to request GPMC mem region\n");
  55                 return;
  56         }
  57
  58         gpmc_smsc911x_resources[0].start = cs_mem_base + 0x0;
  59         gpmc_smsc911x_resources[0].end = cs_mem_base + 0xff;
  60
  61         if (gpio_request_one(gpmc_cfg->gpio_irq, GPIOF_IN, "smsc911x irq")) {
  62                 pr_err("Failed to request IRQ GPIO%d\n", gpmc_cfg->gpio_irq);
  63                 goto free1;
  64         }
  65
  66         gpmc_smsc911x_resources[1].start = gpio_to_irq(gpmc_cfg->gpio_irq);
  67
  68         if (gpio_is_valid(gpmc_cfg->gpio_reset)) {
  69                 ret = gpio_request_one(gpmc_cfg->gpio_reset,
  70                                        GPIOF_OUT_INIT_HIGH, "smsc911x reset");
  71                 if (ret) {
  72                         pr_err("Failed to request reset GPIO%d\n",
  73                                gpmc_cfg->gpio_reset);
  74                         goto free2;
  75                 }
  76
  77                 gpio_set_value(gpmc_cfg->gpio_reset, 0);
  78                 msleep(100);
  79                 gpio_set_value(gpmc_cfg->gpio_reset, 1);
  80         }
  81
  82         gpmc_smsc911x_config.flags = gpmc_cfg->flags ? : SMSC911X_USE_16BIT;
  83
  84         pdev = platform_device_register_resndata(NULL, "smsc911x", gpmc_cfg->id,
  85                  gpmc_smsc911x_resources, ARRAY_SIZE(gpmc_smsc911x_resources),
  86                  &gpmc_smsc911x_config, sizeof(gpmc_smsc911x_config));
  87         if (!pdev) {
  88                 pr_err("Unable to register platform device\n");
  89                 gpio_free(gpmc_cfg->gpio_reset);
  90                 goto free2;
  91         }
  92
  93         return;
  94
  95 free2:
  96         gpio_free(gpmc_cfg->gpio_irq);
  97 free1:
  98         gpmc_cs_free(gpmc_cfg->cs);
  99
 100         pr_err("Could not initialize smsc911x device\n");
 101 }