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 "gpmc.h"
24 #include "gpmc-smsc911x.h"
25
26 static struct resource gpmc_smsc911x_resources[] = {
27 [0] = {
28 .flags = IORESOURCE_MEM,
29 },
30 [1] = {
31 .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
32 },
33 };
34
35 static 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,
39 };
40
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 */
gpmc_smsc911x_init(struct omap_smsc911x_platform_data * gpmc_cfg)46 void __init gpmc_smsc911x_init(struct omap_smsc911x_platform_data *gpmc_cfg)
47 {
48 struct platform_device *pdev;
49 unsigned long cs_mem_base;
50 int ret;
51
52 if (gpmc_cs_request(gpmc_cfg->cs, SZ_16M, &cs_mem_base) < 0) {
53 pr_err("Failed to request GPMC mem region\n");
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
60 if (gpio_request_one(gpmc_cfg->gpio_irq, GPIOF_IN, "smsc911x irq")) {
61 pr_err("Failed to request IRQ GPIO%d\n", gpmc_cfg->gpio_irq);
62 goto free1;
63 }
64
65 gpmc_smsc911x_resources[1].start = gpio_to_irq(gpmc_cfg->gpio_irq);
66
67 if (gpio_is_valid(gpmc_cfg->gpio_reset)) {
68 ret = gpio_request_one(gpmc_cfg->gpio_reset,
69 GPIOF_OUT_INIT_HIGH, "smsc911x reset");
70 if (ret) {
71 pr_err("Failed to request reset GPIO%d\n",
72 gpmc_cfg->gpio_reset);
73 goto free2;
74 }
75
76 gpio_set_value(gpmc_cfg->gpio_reset, 0);
77 msleep(100);
78 gpio_set_value(gpmc_cfg->gpio_reset, 1);
79 }
80
81 gpmc_smsc911x_config.flags = gpmc_cfg->flags ? : SMSC911X_USE_16BIT;
82
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 (IS_ERR(pdev)) {
87 pr_err("Unable to register platform device\n");
88 gpio_free(gpmc_cfg->gpio_reset);
89 goto free2;
90 }
91
92 return;
93
94 free2:
95 gpio_free(gpmc_cfg->gpio_irq);
96 free1:
97 gpmc_cs_free(gpmc_cfg->cs);
98
99 pr_err("Could not initialize smsc911x device\n");
100 }
101