Gitiles
Code Review Sign In
review.evervolv.com / android_kernel_oneplus_msm8996 / 46b51d0835ef1e75dd48fe10c90f9c775301d9ee / . / arch / arm / mach-omap2 / gpmc-smsc911x.c
blob: ef990118d32b2f4205c25c58aec555465096aa39 [file] [log] [blame]
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]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 */
Igor Grinberg11383a92011-04-26 16:25:56 +0000[diff] [blame]13#define pr_fmt(fmt) "%s: " fmt, __func__
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]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
Afzal Mohammed3ef5d002012-10-05 10:37:27 +0530[diff] [blame]23#include "gpmc.h"
Tony Lindgrenac839b32012-09-20 11:41:46 -0700[diff] [blame]24#include "gpmc-smsc911x.h"
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]25
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]26static struct resource gpmc_smsc911x_resources[] = {
27 [0] = {
28 .flags = IORESOURCE_MEM,
29 },
30 [1] = {
Mike Rapoportf0949f72011-04-16 22:29:29 +0000[diff] [blame]31 .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]32 },
33};
34
35static struct smsc911x_platform_config gpmc_smsc911x_config = {
36 .phy_interface = PHY_INTERFACE_MODE_MII,
37 .irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
38 .irq_type = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]39};
40
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]41/*
42 * Initialize smsc911x device connected to the GPMC. Note that we
43 * assume that pin multiplexing is done in the board-*.c file,
44 * or in the bootloader.
45 */
Russ Dill54da0782012-03-23 02:21:33 -0700[diff] [blame]46void __init gpmc_smsc911x_init(struct omap_smsc911x_platform_data *gpmc_cfg)
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]47{
Mike Rapoport21b42732011-04-16 22:29:30 +0000[diff] [blame]48 struct platform_device *pdev;
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]49 unsigned long cs_mem_base;
50 int ret;
51
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]52 if (gpmc_cs_request(gpmc_cfg->cs, SZ_16M, &cs_mem_base) < 0) {
Igor Grinberg11383a92011-04-26 16:25:56 +0000[diff] [blame]53 pr_err("Failed to request GPMC mem region\n");
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]54 return;
55 }
56
57 gpmc_smsc911x_resources[0].start = cs_mem_base + 0x0;
58 gpmc_smsc911x_resources[0].end = cs_mem_base + 0xff;
59
Igor Grinbergbc593f52011-05-03 18:22:09 +0300[diff] [blame]60 if (gpio_request_one(gpmc_cfg->gpio_irq, GPIOF_IN, "smsc911x irq")) {
Igor Grinberg11383a92011-04-26 16:25:56 +0000[diff] [blame]61 pr_err("Failed to request IRQ GPIO%d\n", gpmc_cfg->gpio_irq);
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]62 goto free1;
63 }
64
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]65 gpmc_smsc911x_resources[1].start = gpio_to_irq(gpmc_cfg->gpio_irq);
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]66
67 if (gpio_is_valid(gpmc_cfg->gpio_reset)) {
Igor Grinbergbc593f52011-05-03 18:22:09 +0300[diff] [blame]68 ret = gpio_request_one(gpmc_cfg->gpio_reset,
69 GPIOF_OUT_INIT_HIGH, "smsc911x reset");
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]70 if (ret) {
Igor Grinberg11383a92011-04-26 16:25:56 +0000[diff] [blame]71 pr_err("Failed to request reset GPIO%d\n",
72 gpmc_cfg->gpio_reset);
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]73 goto free2;
74 }
75
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]76 gpio_set_value(gpmc_cfg->gpio_reset, 0);
77 msleep(100);
78 gpio_set_value(gpmc_cfg->gpio_reset, 1);
79 }
80
Russ Dilla0dbf2a2012-03-23 02:21:34 -0700[diff] [blame]81 gpmc_smsc911x_config.flags = gpmc_cfg->flags ? : SMSC911X_USE_16BIT;
Mike Rapoportf0949f72011-04-16 22:29:29 +0000[diff] [blame]82
Mike Rapoport21b42732011-04-16 22:29:30 +0000[diff] [blame]83 pdev = platform_device_register_resndata(NULL, "smsc911x", gpmc_cfg->id,
84 gpmc_smsc911x_resources, ARRAY_SIZE(gpmc_smsc911x_resources),
85 &gpmc_smsc911x_config, sizeof(gpmc_smsc911x_config));
86 if (!pdev) {
Igor Grinberg11383a92011-04-26 16:25:56 +0000[diff] [blame]87 pr_err("Unable to register platform device\n");
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]88 gpio_free(gpmc_cfg->gpio_reset);
89 goto free2;
90 }
91
92 return;
93
94free2:
95 gpio_free(gpmc_cfg->gpio_irq);
96free1:
97 gpmc_cs_free(gpmc_cfg->cs);
98
Igor Grinberg11383a92011-04-26 16:25:56 +0000[diff] [blame]99 pr_err("Could not initialize smsc911x device\n");
Tim Nordellcdd280b2010-09-27 16:05:49 +0000[diff] [blame]100}