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/*
* linux/arch/arm/mach-omap2/gpmc-smsc911x.c
*
* Copyright (C) 2009 Li-Pro.Net
* Stephan Linz <linz@li-pro.net>
*
* Modified from linux/arch/arm/mach-omap2/gpmc-smc91x.c
*
* 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.
*/
#define pr_fmt(fmt) "%s: " fmt, __func__
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/smsc911x.h>
#include <linux/regulator/fixed.h>
#include <linux/regulator/machine.h>
#include <plat/board.h>
#include <plat/gpmc.h>
#include <plat/gpmc-smsc911x.h>
static struct resource gpmc_smsc911x_resources[] = {
[0] = {
.flags = IORESOURCE_MEM,
},
[1] = {
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
},
};
static struct smsc911x_platform_config gpmc_smsc911x_config = {
.phy_interface = PHY_INTERFACE_MODE_MII,
.irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
.irq_type = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
};
static struct regulator_consumer_supply gpmc_smsc911x_supply[] = {
REGULATOR_SUPPLY("vddvario", "smsc911x.0"),
REGULATOR_SUPPLY("vdd33a", "smsc911x.0"),
};
/* Generic regulator definition to satisfy smsc911x */
static struct regulator_init_data gpmc_smsc911x_reg_init_data = {
.constraints = {
.min_uV = 3300000,
.max_uV = 3300000,
.valid_modes_mask = REGULATOR_MODE_NORMAL
| REGULATOR_MODE_STANDBY,
.valid_ops_mask = REGULATOR_CHANGE_MODE
| REGULATOR_CHANGE_STATUS,
},
.num_consumer_supplies = ARRAY_SIZE(gpmc_smsc911x_supply),
.consumer_supplies = gpmc_smsc911x_supply,
};
static struct fixed_voltage_config gpmc_smsc911x_fixed_reg_data = {
.supply_name = "gpmc_smsc911x",
.microvolts = 3300000,
.gpio = -EINVAL,
.startup_delay = 0,
.enable_high = 0,
.enabled_at_boot = 1,
.init_data = &gpmc_smsc911x_reg_init_data,
};
/*
* Platform device id of 42 is a temporary fix to avoid conflicts
* with other reg-fixed-voltage devices. The real fix should
* involve the driver core providing a way of dynamically
* assigning a unique id on registration for platform devices
* in the same name space.
*/
static struct platform_device gpmc_smsc911x_regulator = {
.name = "reg-fixed-voltage",
.id = 42,
.dev = {
.platform_data = &gpmc_smsc911x_fixed_reg_data,
},
};
/*
* Initialize smsc911x device connected to the GPMC. Note that we
* assume that pin multiplexing is done in the board-*.c file,
* or in the bootloader.
*/
void __init gpmc_smsc911x_init(struct omap_smsc911x_platform_data *gpmc_cfg)
{
struct platform_device *pdev;
unsigned long cs_mem_base;
int ret;
if (!gpmc_cfg->id) {
ret = platform_device_register(&gpmc_smsc911x_regulator);
if (ret < 0) {
pr_err("Unable to register smsc911x regulators: %d\n",
ret);
return;
}
}
if (gpmc_cs_request(gpmc_cfg->cs, SZ_16M, &cs_mem_base) < 0) {
pr_err("Failed to request GPMC mem region\n");
return;
}
gpmc_smsc911x_resources[0].start = cs_mem_base + 0x0;
gpmc_smsc911x_resources[0].end = cs_mem_base + 0xff;
if (gpio_request_one(gpmc_cfg->gpio_irq, GPIOF_IN, "smsc911x irq")) {
pr_err("Failed to request IRQ GPIO%d\n", gpmc_cfg->gpio_irq);
goto free1;
}
gpmc_smsc911x_resources[1].start = gpio_to_irq(gpmc_cfg->gpio_irq);
if (gpio_is_valid(gpmc_cfg->gpio_reset)) {
ret = gpio_request_one(gpmc_cfg->gpio_reset,
GPIOF_OUT_INIT_HIGH, "smsc911x reset");
if (ret) {
pr_err("Failed to request reset GPIO%d\n",
gpmc_cfg->gpio_reset);
goto free2;
}
gpio_set_value(gpmc_cfg->gpio_reset, 0);
msleep(100);
gpio_set_value(gpmc_cfg->gpio_reset, 1);
}
gpmc_smsc911x_config.flags = gpmc_cfg->flags ? : SMSC911X_USE_16BIT;
pdev = platform_device_register_resndata(NULL, "smsc911x", gpmc_cfg->id,
gpmc_smsc911x_resources, ARRAY_SIZE(gpmc_smsc911x_resources),
&gpmc_smsc911x_config, sizeof(gpmc_smsc911x_config));
if (!pdev) {
pr_err("Unable to register platform device\n");
gpio_free(gpmc_cfg->gpio_reset);
goto free2;
}
return;
free2:
gpio_free(gpmc_cfg->gpio_irq);
free1:
gpmc_cs_free(gpmc_cfg->cs);
pr_err("Could not initialize smsc911x device\n");
}
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