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 omap_smsc911x_platform_data *gpmc_cfg;
  28
  29 static struct resource gpmc_smsc911x_resources[] = {
  30         [0] = {
  31                 .flags          = IORESOURCE_MEM,
  32         },
  33         [1] = {
  34                 .flags          = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
  35         },
  36 };
  37
  38 static struct smsc911x_platform_config gpmc_smsc911x_config = {
  39         .phy_interface  = PHY_INTERFACE_MODE_MII,
  40         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
  41         .irq_type       = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
  42         .flags          = SMSC911X_USE_16BIT,
  43 };
  44
  45 /*
  46  * Initialize smsc911x device connected to the GPMC. Note that we
  47  * assume that pin multiplexing is done in the board-*.c file,
  48  * or in the bootloader.
  49  */
  50 void __init gpmc_smsc911x_init(struct omap_smsc911x_platform_data *board_data)
  51 {
  52         struct platform_device *pdev;
  53         unsigned long cs_mem_base;
  54         int ret;
  55
  56         gpmc_cfg = board_data;
  57
  58         if (gpmc_cs_request(gpmc_cfg->cs, SZ_16M, &cs_mem_base) < 0) {
  59                 pr_err("Failed to request GPMC mem region\n");
  60                 return;
  61         }
  62
  63         gpmc_smsc911x_resources[0].start = cs_mem_base + 0x0;
  64         gpmc_smsc911x_resources[0].end = cs_mem_base + 0xff;
  65
  66         if (gpio_request_one(gpmc_cfg->gpio_irq, GPIOF_IN, "smsc911x irq")) {
  67                 pr_err("Failed to request IRQ GPIO%d\n", gpmc_cfg->gpio_irq);
  68                 goto free1;
  69         }
  70
  71         gpmc_smsc911x_resources[1].start = gpio_to_irq(gpmc_cfg->gpio_irq);
  72
  73         if (gpio_is_valid(gpmc_cfg->gpio_reset)) {
  74                 ret = gpio_request_one(gpmc_cfg->gpio_reset,
  75                                        GPIOF_OUT_INIT_HIGH, "smsc911x reset");
  76                 if (ret) {
  77                         pr_err("Failed to request reset GPIO%d\n",
  78                                gpmc_cfg->gpio_reset);
  79                         goto free2;
  80                 }
  81
  82                 gpio_set_value(gpmc_cfg->gpio_reset, 0);
  83                 msleep(100);
  84                 gpio_set_value(gpmc_cfg->gpio_reset, 1);
  85         }
  86
  87         if (gpmc_cfg->flags)
  88                 gpmc_smsc911x_config.flags = gpmc_cfg->flags;
  89
  90         pdev = platform_device_register_resndata(NULL, "smsc911x", gpmc_cfg->id,
  91                  gpmc_smsc911x_resources, ARRAY_SIZE(gpmc_smsc911x_resources),
  92                  &gpmc_smsc911x_config, sizeof(gpmc_smsc911x_config));
  93         if (!pdev) {
  94                 pr_err("Unable to register platform device\n");
  95                 gpio_free(gpmc_cfg->gpio_reset);
  96                 goto free2;
  97         }
  98
  99         return;
 100
 101 free2:
 102         gpio_free(gpmc_cfg->gpio_irq);
 103 free1:
 104         gpmc_cs_free(gpmc_cfg->cs);
 105
 106         pr_err("Could not initialize smsc911x device\n");
 107 }