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