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
  14 #include <linux/kernel.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/gpio.h>
  17 #include <linux/delay.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/io.h>
  20 #include <linux/smsc911x.h>
  21
  22 #include <plat/board.h>
  23 #include <plat/gpmc.h>
  24 #include <plat/gpmc-smsc911x.h>
  25
  26 static struct omap_smsc911x_platform_data *gpmc_cfg;
  27
  28 static struct resource gpmc_smsc911x_resources[] = {
  29         [0] = {
  30                 .flags          = IORESOURCE_MEM,
  31         },
  32         [1] = {
  33                 .flags          = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
  34         },
  35 };
  36
  37 static struct smsc911x_platform_config gpmc_smsc911x_config = {
  38         .phy_interface  = PHY_INTERFACE_MODE_MII,
  39         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
  40         .irq_type       = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
  41         .flags          = SMSC911X_USE_16BIT,
  42 };
  43
  44 /*
  45  * Initialize smsc911x device connected to the GPMC. Note that we
  46  * assume that pin multiplexing is done in the board-*.c file,
  47  * or in the bootloader.
  48  */
  49 void __init gpmc_smsc911x_init(struct omap_smsc911x_platform_data *board_data)
  50 {
  51         struct platform_device *pdev;
  52         unsigned long cs_mem_base;
  53         int ret;
  54
  55         gpmc_cfg = board_data;
  56
  57         if (gpmc_cs_request(gpmc_cfg->cs, SZ_16M, &cs_mem_base) < 0) {
  58                 printk(KERN_ERR "Failed to request GPMC mem for smsc911x\n");
  59                 return;
  60         }
  61
  62         gpmc_smsc911x_resources[0].start = cs_mem_base + 0x0;
  63         gpmc_smsc911x_resources[0].end = cs_mem_base + 0xff;
  64
  65         if (gpio_request(gpmc_cfg->gpio_irq, "smsc911x irq") < 0) {
  66                 printk(KERN_ERR "Failed to request GPIO%d for smsc911x IRQ\n",
  67                                 gpmc_cfg->gpio_irq);
  68                 goto free1;
  69         }
  70
  71         gpio_direction_input(gpmc_cfg->gpio_irq);
  72         gpmc_smsc911x_resources[1].start = gpio_to_irq(gpmc_cfg->gpio_irq);
  73
  74         if (gpio_is_valid(gpmc_cfg->gpio_reset)) {
  75                 ret = gpio_request(gpmc_cfg->gpio_reset, "smsc911x reset");
  76                 if (ret) {
  77                         printk(KERN_ERR "Failed to request GPIO%d for smsc911x reset\n",
  78                                         gpmc_cfg->gpio_reset);
  79                         goto free2;
  80                 }
  81
  82                 gpio_direction_output(gpmc_cfg->gpio_reset, 1);
  83                 gpio_set_value(gpmc_cfg->gpio_reset, 0);
  84                 msleep(100);
  85                 gpio_set_value(gpmc_cfg->gpio_reset, 1);
  86         }
  87
  88         if (gpmc_cfg->flags)
  89                 gpmc_smsc911x_config.flags = gpmc_cfg->flags;
  90
  91         pdev = platform_device_register_resndata(NULL, "smsc911x", gpmc_cfg->id,
  92                  gpmc_smsc911x_resources, ARRAY_SIZE(gpmc_smsc911x_resources),
  93                  &gpmc_smsc911x_config, sizeof(gpmc_smsc911x_config));
  94         if (!pdev) {
  95                 printk(KERN_ERR "Unable to register smsc911x device\n");
  96                 gpio_free(gpmc_cfg->gpio_reset);
  97                 goto free2;
  98         }
  99
 100         return;
 101
 102 free2:
 103         gpio_free(gpmc_cfg->gpio_irq);
 104 free1:
 105         gpmc_cs_free(gpmc_cfg->cs);
 106
 107         printk(KERN_ERR "Could not initialize smsc911x\n");
 108 }