Root/target/linux/ramips/files/arch/mips/ralink/rt288x/devices.c

1/*
2 * Ralink RT288x SoC platform device registration
3 *
4 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published
9 * by the Free Software Foundation.
10 */
11
12#include <linux/kernel.h>
13#include <linux/platform_device.h>
14#include <linux/mtd/mtd.h>
15#include <linux/mtd/physmap.h>
16#include <linux/etherdevice.h>
17#include <linux/err.h>
18#include <linux/clk.h>
19
20#include <asm/addrspace.h>
21
22#include <asm/mach-ralink/rt288x.h>
23#include <asm/mach-ralink/rt288x_regs.h>
24#include <asm/mach-ralink/ramips_eth_platform.h>
25
26#include "devices.h"
27
28static struct resource rt288x_flash0_resources[] = {
29    {
30        .flags = IORESOURCE_MEM,
31        .start = KSEG1ADDR(RT2880_FLASH0_BASE),
32        .end = KSEG1ADDR(RT2880_FLASH0_BASE) +
33              RT2880_FLASH0_SIZE - 1,
34    },
35};
36
37static struct platform_device rt288x_flash0_device = {
38    .name = "physmap-flash",
39    .resource = rt288x_flash0_resources,
40    .num_resources = ARRAY_SIZE(rt288x_flash0_resources),
41};
42
43static struct resource rt288x_flash1_resources[] = {
44    {
45        .flags = IORESOURCE_MEM,
46        .start = KSEG1ADDR(RT2880_FLASH1_BASE),
47        .end = KSEG1ADDR(RT2880_FLASH1_BASE) +
48              RT2880_FLASH1_SIZE - 1,
49    },
50};
51
52static struct platform_device rt288x_flash1_device = {
53    .name = "physmap-flash",
54    .resource = rt288x_flash1_resources,
55    .num_resources = ARRAY_SIZE(rt288x_flash1_resources),
56};
57
58static int rt288x_flash_instance __initdata;
59void __init rt288x_register_flash(unsigned int id,
60                  struct physmap_flash_data *pdata)
61{
62    struct platform_device *pdev;
63    u32 t;
64    int reg;
65
66    switch (id) {
67    case 0:
68        pdev = &rt288x_flash0_device;
69        reg = MEMC_REG_FLASH_CFG0;
70        break;
71    case 1:
72        pdev = &rt288x_flash1_device;
73        reg = MEMC_REG_FLASH_CFG1;
74        break;
75    default:
76        return;
77    }
78
79    t = rt288x_memc_rr(reg);
80    t = (t >> FLASH_CFG_WIDTH_SHIFT) & FLASH_CFG_WIDTH_MASK;
81
82    switch (t) {
83    case FLASH_CFG_WIDTH_8BIT:
84        pdata->width = 1;
85        break;
86    case FLASH_CFG_WIDTH_16BIT:
87        pdata->width = 2;
88        break;
89    case FLASH_CFG_WIDTH_32BIT:
90        pdata->width = 4;
91        break;
92    default:
93        printk(KERN_ERR "RT288x: flash bank%u witdh is invalid\n", id);
94        return;
95    }
96
97    pdev->dev.platform_data = pdata;
98    pdev->id = rt288x_flash_instance;
99
100    platform_device_register(pdev);
101    rt288x_flash_instance++;
102}
103
104static struct resource rt288x_wifi_resources[] = {
105    {
106        .start = RT2880_WMAC_BASE,
107        .end = RT2880_WMAC_BASE + 0x3FFFF,
108        .flags = IORESOURCE_MEM,
109    }, {
110        .start = RT288X_CPU_IRQ_WNIC,
111        .end = RT288X_CPU_IRQ_WNIC,
112        .flags = IORESOURCE_IRQ,
113    },
114};
115
116static struct platform_device rt288x_wifi_device = {
117    .name = "rt2800_wmac",
118    .resource = rt288x_wifi_resources,
119    .num_resources = ARRAY_SIZE(rt288x_wifi_resources),
120    .dev = {
121        .platform_data = NULL,
122    }
123};
124
125void __init rt288x_register_wifi(void)
126{
127    platform_device_register(&rt288x_wifi_device);
128}
129
130static void rt288x_fe_reset(void)
131{
132    rt288x_sysc_wr(RT2880_RESET_FE, SYSC_REG_RESET_CTRL);
133}
134
135static struct resource rt288x_eth_resources[] = {
136    {
137        .start = RT2880_FE_BASE,
138        .end = RT2880_FE_BASE + PAGE_SIZE - 1,
139        .flags = IORESOURCE_MEM,
140    }, {
141        .start = RT288X_CPU_IRQ_FE,
142        .end = RT288X_CPU_IRQ_FE,
143        .flags = IORESOURCE_IRQ,
144    },
145};
146
147struct ramips_eth_platform_data rt288x_eth_data;
148static struct platform_device rt288x_eth_device = {
149    .name = "ramips_eth",
150    .resource = rt288x_eth_resources,
151    .num_resources = ARRAY_SIZE(rt288x_eth_resources),
152    .dev = {
153        .platform_data = &rt288x_eth_data,
154    }
155};
156
157void __init rt288x_register_ethernet(void)
158{
159    struct clk *clk;
160
161    clk = clk_get(NULL, "sys");
162    if (IS_ERR(clk))
163        panic("unable to get SYS clock, err=%ld", PTR_ERR(clk));
164
165    rt288x_eth_data.sys_freq = clk_get_rate(clk);
166    rt288x_eth_data.reset_fe = rt288x_fe_reset;
167    rt288x_eth_data.min_pkt_len = 64;
168
169    if (!is_valid_ether_addr(rt288x_eth_data.mac))
170        random_ether_addr(rt288x_eth_data.mac);
171
172    platform_device_register(&rt288x_eth_device);
173}
174
175static struct resource rt288x_wdt_resources[] = {
176    {
177        .start = RT2880_TIMER_BASE,
178        .end = RT2880_TIMER_BASE + RT2880_TIMER_SIZE - 1,
179        .flags = IORESOURCE_MEM,
180    },
181};
182
183static struct platform_device rt288x_wdt_device = {
184    .name = "ramips-wdt",
185    .id = -1,
186    .resource = rt288x_wdt_resources,
187    .num_resources = ARRAY_SIZE(rt288x_wdt_resources),
188};
189
190void __init rt288x_register_wdt(void)
191{
192    u32 t;
193
194    /* enable WDT reset output on pin SRAM_CS_N */
195    t = rt288x_sysc_rr(SYSC_REG_CLKCFG);
196    t |= CLKCFG_SRAM_CS_N_WDT;
197    rt288x_sysc_wr(t, SYSC_REG_CLKCFG);
198
199    platform_device_register(&rt288x_wdt_device);
200}
201

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