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MIPS: RB532: GPIO register offsets are relative to GPIOBASE
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1 /*
2  *  RouterBoard 500 Platform devices
3  *
4  *  Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
5  *  Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
6  *
7  *  This program is free software; you can redistribute it and/or modify
8  *  it under the terms of the GNU General Public License as published by
9  *  the Free Software Foundation; either version 2 of the License, or
10  *  (at your option) any later version.
11  *
12  *  This program is distributed in the hope that it will be useful,
13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  *  GNU General Public License for more details.
16  */
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19 #include <linux/ctype.h>
20 #include <linux/string.h>
21 #include <linux/platform_device.h>
22 #include <linux/mtd/nand.h>
23 #include <linux/mtd/mtd.h>
24 #include <linux/mtd/partitions.h>
25 #include <linux/gpio_keys.h>
26 #include <linux/input.h>
27
28 #include <asm/bootinfo.h>
29
30 #include <asm/mach-rc32434/rc32434.h>
31 #include <asm/mach-rc32434/dma.h>
32 #include <asm/mach-rc32434/dma_v.h>
33 #include <asm/mach-rc32434/eth.h>
34 #include <asm/mach-rc32434/rb.h>
35 #include <asm/mach-rc32434/integ.h>
36 #include <asm/mach-rc32434/gpio.h>
37 #include <asm/mach-rc32434/irq.h>
38
39 #define ETH0_RX_DMA_ADDR  (DMA0_BASE_ADDR + 0 * DMA_CHAN_OFFSET)
40 #define ETH0_TX_DMA_ADDR  (DMA0_BASE_ADDR + 1 * DMA_CHAN_OFFSET)
41
42 static struct resource korina_dev0_res[] = {
43         {
44                 .name = "korina_regs",
45                 .start = ETH0_BASE_ADDR,
46                 .end = ETH0_BASE_ADDR + sizeof(struct eth_regs),
47                 .flags = IORESOURCE_MEM,
48          }, {
49                 .name = "korina_rx",
50                 .start = ETH0_DMA_RX_IRQ,
51                 .end = ETH0_DMA_RX_IRQ,
52                 .flags = IORESOURCE_IRQ
53         }, {
54                 .name = "korina_tx",
55                 .start = ETH0_DMA_TX_IRQ,
56                 .end = ETH0_DMA_TX_IRQ,
57                 .flags = IORESOURCE_IRQ
58         }, {
59                 .name = "korina_ovr",
60                 .start = ETH0_RX_OVR_IRQ,
61                 .end = ETH0_RX_OVR_IRQ,
62                 .flags = IORESOURCE_IRQ
63         }, {
64                 .name = "korina_und",
65                 .start = ETH0_TX_UND_IRQ,
66                 .end = ETH0_TX_UND_IRQ,
67                 .flags = IORESOURCE_IRQ
68         }, {
69                 .name = "korina_dma_rx",
70                 .start = ETH0_RX_DMA_ADDR,
71                 .end = ETH0_RX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
72                 .flags = IORESOURCE_MEM,
73          }, {
74                 .name = "korina_dma_tx",
75                 .start = ETH0_TX_DMA_ADDR,
76                 .end = ETH0_TX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
77                 .flags = IORESOURCE_MEM,
78          }
79 };
80
81 static struct korina_device korina_dev0_data = {
82         .name = "korina0",
83         .mac = {0xde, 0xca, 0xff, 0xc0, 0xff, 0xee}
84 };
85
86 static struct platform_device korina_dev0 = {
87         .id = -1,
88         .name = "korina",
89         .dev.platform_data = &korina_dev0_data,
90         .resource = korina_dev0_res,
91         .num_resources = ARRAY_SIZE(korina_dev0_res),
92 };
93
94 static struct resource cf_slot0_res[] = {
95         {
96                 .name = "cf_membase",
97                 .flags = IORESOURCE_MEM
98         }, {
99                 .name = "cf_irq",
100                 .start = (8 + 4 * 32 + CF_GPIO_NUM),    /* 149 */
101                 .end = (8 + 4 * 32 + CF_GPIO_NUM),
102                 .flags = IORESOURCE_IRQ
103         }
104 };
105
106 static struct cf_device cf_slot0_data = {
107         .gpio_pin = CF_GPIO_NUM
108 };
109
110 static struct platform_device cf_slot0 = {
111         .id = -1,
112         .name = "pata-rb532-cf",
113         .dev.platform_data = &cf_slot0_data,
114         .resource = cf_slot0_res,
115         .num_resources = ARRAY_SIZE(cf_slot0_res),
116 };
117
118 /* Resources and device for NAND */
119 static int rb532_dev_ready(struct mtd_info *mtd)
120 {
121         return gpio_get_value(GPIO_RDY);
122 }
123
124 static void rb532_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
125 {
126         struct nand_chip *chip = mtd->priv;
127         unsigned char orbits, nandbits;
128
129         if (ctrl & NAND_CTRL_CHANGE) {
130                 orbits = (ctrl & NAND_CLE) << 1;
131                 orbits |= (ctrl & NAND_ALE) >> 1;
132
133                 nandbits = (~ctrl & NAND_CLE) << 1;
134                 nandbits |= (~ctrl & NAND_ALE) >> 1;
135
136                 set_latch_u5(orbits, nandbits);
137         }
138         if (cmd != NAND_CMD_NONE)
139                 writeb(cmd, chip->IO_ADDR_W);
140 }
141
142 static struct resource nand_slot0_res[] = {
143         [0] = {
144                 .name = "nand_membase",
145                 .flags = IORESOURCE_MEM
146         }
147 };
148
149 static struct platform_nand_data rb532_nand_data = {
150         .ctrl.dev_ready = rb532_dev_ready,
151         .ctrl.cmd_ctrl  = rb532_cmd_ctrl,
152 };
153
154 static struct platform_device nand_slot0 = {
155         .name = "gen_nand",
156         .id = -1,
157         .resource = nand_slot0_res,
158         .num_resources = ARRAY_SIZE(nand_slot0_res),
159         .dev.platform_data = &rb532_nand_data,
160 };
161
162 static struct mtd_partition rb532_partition_info[] = {
163         {
164                 .name = "Routerboard NAND boot",
165                 .offset = 0,
166                 .size = 4 * 1024 * 1024,
167         }, {
168                 .name = "rootfs",
169                 .offset = MTDPART_OFS_NXTBLK,
170                 .size = MTDPART_SIZ_FULL,
171         }
172 };
173
174 static struct platform_device rb532_led = {
175         .name = "rb532-led",
176         .id = -1,
177 };
178
179 static struct gpio_keys_button rb532_gpio_btn[] = {
180         {
181                 .gpio = 1,
182                 .code = BTN_0,
183                 .desc = "S1",
184                 .active_low = 1,
185         }
186 };
187
188 static struct gpio_keys_platform_data rb532_gpio_btn_data = {
189         .buttons = rb532_gpio_btn,
190         .nbuttons = ARRAY_SIZE(rb532_gpio_btn),
191 };
192
193 static struct platform_device rb532_button = {
194         .name   = "gpio-keys",
195         .id     = -1,
196         .dev    = {
197                 .platform_data = &rb532_gpio_btn_data,
198         }
199 };
200
201 static struct resource rb532_wdt_res[] = {
202         {
203                 .name = "rb532_wdt_res",
204                 .start = INTEG0_BASE_ADDR,
205                 .end = INTEG0_BASE_ADDR + sizeof(struct integ),
206                 .flags = IORESOURCE_MEM,
207         }
208 };
209
210 static struct platform_device rb532_wdt = {
211         .name           = "rc32434_wdt",
212         .id             = -1,
213         .resource       = rb532_wdt_res,
214         .num_resources  = ARRAY_SIZE(rb532_wdt_res),
215 };
216
217 static struct platform_device *rb532_devs[] = {
218         &korina_dev0,
219         &nand_slot0,
220         &cf_slot0,
221         &rb532_led,
222         &rb532_button,
223         &rb532_wdt
224 };
225
226 static void __init parse_mac_addr(char *macstr)
227 {
228         int i, j;
229         unsigned char result, value;
230
231         for (i = 0; i < 6; i++) {
232                 result = 0;
233
234                 if (i != 5 && *(macstr + 2) != ':')
235                         return;
236
237                 for (j = 0; j < 2; j++) {
238                         if (isxdigit(*macstr)
239                             && (value =
240                                 isdigit(*macstr) ? *macstr -
241                                 '0' : toupper(*macstr) - 'A' + 10) < 16) {
242                                 result = result * 16 + value;
243                                 macstr++;
244                         } else
245                                 return;
246                 }
247
248                 macstr++;
249                 korina_dev0_data.mac[i] = result;
250         }
251 }
252
253
254 /* NAND definitions */
255 #define NAND_CHIP_DELAY 25
256
257 static void __init rb532_nand_setup(void)
258 {
259         switch (mips_machtype) {
260         case MACH_MIKROTIK_RB532A:
261                 set_latch_u5(LO_FOFF | LO_CEX,
262                                 LO_ULED | LO_ALE | LO_CLE | LO_WPX);
263                 break;
264         default:
265                 set_latch_u5(LO_WPX | LO_FOFF | LO_CEX,
266                                 LO_ULED | LO_ALE | LO_CLE);
267                 break;
268         }
269
270         /* Setup NAND specific settings */
271         rb532_nand_data.chip.nr_chips = 1;
272         rb532_nand_data.chip.nr_partitions = ARRAY_SIZE(rb532_partition_info);
273         rb532_nand_data.chip.partitions = rb532_partition_info;
274         rb532_nand_data.chip.chip_delay = NAND_CHIP_DELAY;
275         rb532_nand_data.chip.options = NAND_NO_AUTOINCR;
276 }
277
278
279 static int __init plat_setup_devices(void)
280 {
281         /* Look for the CF card reader */
282         if (!readl(IDT434_REG_BASE + DEV1MASK))
283                 rb532_devs[2] = NULL;   /* disable cf_slot0 at index 2 */
284         else {
285                 cf_slot0_res[0].start =
286                     readl(IDT434_REG_BASE + DEV1BASE);
287                 cf_slot0_res[0].end = cf_slot0_res[0].start + 0x1000;
288         }
289
290         /* Read the NAND resources from the device controller */
291         nand_slot0_res[0].start = readl(IDT434_REG_BASE + DEV2BASE);
292         nand_slot0_res[0].end = nand_slot0_res[0].start + 0x1000;
293
294         /* Initialise the NAND device */
295         rb532_nand_setup();
296
297         return platform_add_devices(rb532_devs, ARRAY_SIZE(rb532_devs));
298 }
299
300 static int __init setup_kmac(char *s)
301 {
302         printk(KERN_INFO "korina mac = %s\n", s);
303         parse_mac_addr(s);
304         return 0;
305 }
306
307 __setup("kmac=", setup_kmac);
308
309 arch_initcall(plat_setup_devices);