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 #include <linux/regulator/fixed.h>
  23 #include <linux/regulator/machine.h>
  24
  25 #include <plat/board.h>
  26 #include <plat/gpmc.h>
  27 #include <plat/gpmc-smsc911x.h>
  28
  29 static struct omap_smsc911x_platform_data *gpmc_cfg;
  30
  31 static struct resource gpmc_smsc911x_resources[] = {
  32         [0] = {
  33                 .flags          = IORESOURCE_MEM,
  34         },
  35         [1] = {
  36                 .flags          = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
  37         },
  38 };
  39
  40 static struct smsc911x_platform_config gpmc_smsc911x_config = {
  41         .phy_interface  = PHY_INTERFACE_MODE_MII,
  42         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
  43         .irq_type       = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
  44         .flags          = SMSC911X_USE_16BIT,
  45 };
  46
  47 static struct regulator_consumer_supply gpmc_smsc911x_supply[] = {
  48         REGULATOR_SUPPLY("vddvario", "smsc911x.0"),
  49         REGULATOR_SUPPLY("vdd33a", "smsc911x.0"),
  50 };
  51
  52 /* Generic regulator definition to satisfy smsc911x */
  53 static struct regulator_init_data gpmc_smsc911x_reg_init_data = {
  54         .constraints = {
  55                 .min_uV                 = 3300000,
  56                 .max_uV                 = 3300000,
  57                 .valid_modes_mask       = REGULATOR_MODE_NORMAL
  58                                         | REGULATOR_MODE_STANDBY,
  59                 .valid_ops_mask         = REGULATOR_CHANGE_MODE
  60                                         | REGULATOR_CHANGE_STATUS,
  61         },
  62         .num_consumer_supplies  = ARRAY_SIZE(gpmc_smsc911x_supply),
  63         .consumer_supplies      = gpmc_smsc911x_supply,
  64 };
  65
  66 static struct fixed_voltage_config gpmc_smsc911x_fixed_reg_data = {
  67         .supply_name            = "gpmc_smsc911x",
  68         .microvolts             = 3300000,
  69         .gpio                   = -EINVAL,
  70         .startup_delay          = 0,
  71         .enable_high            = 0,
  72         .enabled_at_boot        = 1,
  73         .init_data              = &gpmc_smsc911x_reg_init_data,
  74 };
  75
  76 /*
  77  * Platform device id of 42 is a temporary fix to avoid conflicts
  78  * with other reg-fixed-voltage devices. The real fix should
  79  * involve the driver core providing a way of dynamically
  80  * assigning a unique id on registration for platform devices
  81  * in the same name space.
  82  */
  83 static struct platform_device gpmc_smsc911x_regulator = {
  84         .name           = "reg-fixed-voltage",
  85         .id             = 42,
  86         .dev = {
  87                 .platform_data  = &gpmc_smsc911x_fixed_reg_data,
  88         },
  89 };
  90
  91 /*
  92  * Initialize smsc911x device connected to the GPMC. Note that we
  93  * assume that pin multiplexing is done in the board-*.c file,
  94  * or in the bootloader.
  95  */
  96 void __init gpmc_smsc911x_init(struct omap_smsc911x_platform_data *board_data)
  97 {
  98         struct platform_device *pdev;
  99         unsigned long cs_mem_base;
 100         int ret;
 101
 102         gpmc_cfg = board_data;
 103
 104         ret = platform_device_register(&gpmc_smsc911x_regulator);
 105         if (ret < 0) {
 106                 pr_err("Unable to register smsc911x regulators: %d\n", ret);
 107                 return;
 108         }
 109
 110         if (gpmc_cs_request(gpmc_cfg->cs, SZ_16M, &cs_mem_base) < 0) {
 111                 pr_err("Failed to request GPMC mem region\n");
 112                 return;
 113         }
 114
 115         gpmc_smsc911x_resources[0].start = cs_mem_base + 0x0;
 116         gpmc_smsc911x_resources[0].end = cs_mem_base + 0xff;
 117
 118         if (gpio_request_one(gpmc_cfg->gpio_irq, GPIOF_IN, "smsc911x irq")) {
 119                 pr_err("Failed to request IRQ GPIO%d\n", gpmc_cfg->gpio_irq);
 120                 goto free1;
 121         }
 122
 123         gpmc_smsc911x_resources[1].start = gpio_to_irq(gpmc_cfg->gpio_irq);
 124
 125         if (gpio_is_valid(gpmc_cfg->gpio_reset)) {
 126                 ret = gpio_request_one(gpmc_cfg->gpio_reset,
 127                                        GPIOF_OUT_INIT_HIGH, "smsc911x reset");
 128                 if (ret) {
 129                         pr_err("Failed to request reset GPIO%d\n",
 130                                gpmc_cfg->gpio_reset);
 131                         goto free2;
 132                 }
 133
 134                 gpio_set_value(gpmc_cfg->gpio_reset, 0);
 135                 msleep(100);
 136                 gpio_set_value(gpmc_cfg->gpio_reset, 1);
 137         }
 138
 139         if (gpmc_cfg->flags)
 140                 gpmc_smsc911x_config.flags = gpmc_cfg->flags;
 141
 142         pdev = platform_device_register_resndata(NULL, "smsc911x", gpmc_cfg->id,
 143                  gpmc_smsc911x_resources, ARRAY_SIZE(gpmc_smsc911x_resources),
 144                  &gpmc_smsc911x_config, sizeof(gpmc_smsc911x_config));
 145         if (!pdev) {
 146                 pr_err("Unable to register platform device\n");
 147                 gpio_free(gpmc_cfg->gpio_reset);
 148                 goto free2;
 149         }
 150
 151         return;
 152
 153 free2:
 154         gpio_free(gpmc_cfg->gpio_irq);
 155 free1:
 156         gpmc_cs_free(gpmc_cfg->cs);
 157
 158         pr_err("Could not initialize smsc911x device\n");
 159 }