arch/mips/rb532/devices.c

   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 #include <linux/serial_8250.h>
  28
  29 #include <asm/bootinfo.h>
  30
  31 #include <asm/mach-rc32434/rc32434.h>
  32 #include <asm/mach-rc32434/dma.h>
  33 #include <asm/mach-rc32434/dma_v.h>
  34 #include <asm/mach-rc32434/eth.h>
  35 #include <asm/mach-rc32434/rb.h>
  36 #include <asm/mach-rc32434/integ.h>
  37 #include <asm/mach-rc32434/gpio.h>
  38 #include <asm/mach-rc32434/irq.h>
  39
  40 #define ETH0_RX_DMA_ADDR  (DMA0_BASE_ADDR + 0 * DMA_CHAN_OFFSET)
  41 #define ETH0_TX_DMA_ADDR  (DMA0_BASE_ADDR + 1 * DMA_CHAN_OFFSET)
  42
  43 extern unsigned int idt_cpu_freq;
  44
  45 static struct mpmc_device dev3;
  46
  47 void set_latch_u5(unsigned char or_mask, unsigned char nand_mask)
  48 {
  49         unsigned long flags;
  50
  51         spin_lock_irqsave(&dev3.lock, flags);
  52
  53         dev3.state = (dev3.state | or_mask) & ~nand_mask;
  54         writeb(dev3.state, dev3.base);
  55
  56         spin_unlock_irqrestore(&dev3.lock, flags);
  57 }
  58 EXPORT_SYMBOL(set_latch_u5);
  59
  60 unsigned char get_latch_u5(void)
  61 {
  62         return dev3.state;
  63 }
  64 EXPORT_SYMBOL(get_latch_u5);
  65
  66 static struct resource korina_dev0_res[] = {
  67         {
  68                 .name = "korina_regs",
  69                 .start = ETH0_BASE_ADDR,
  70                 .end = ETH0_BASE_ADDR + sizeof(struct eth_regs),
  71                 .flags = IORESOURCE_MEM,
  72          }, {
  73                 .name = "korina_rx",
  74                 .start = ETH0_DMA_RX_IRQ,
  75                 .end = ETH0_DMA_RX_IRQ,
  76                 .flags = IORESOURCE_IRQ
  77         }, {
  78                 .name = "korina_tx",
  79                 .start = ETH0_DMA_TX_IRQ,
  80                 .end = ETH0_DMA_TX_IRQ,
  81                 .flags = IORESOURCE_IRQ
  82         }, {
  83                 .name = "korina_ovr",
  84                 .start = ETH0_RX_OVR_IRQ,
  85                 .end = ETH0_RX_OVR_IRQ,
  86                 .flags = IORESOURCE_IRQ
  87         }, {
  88                 .name = "korina_und",
  89                 .start = ETH0_TX_UND_IRQ,
  90                 .end = ETH0_TX_UND_IRQ,
  91                 .flags = IORESOURCE_IRQ
  92         }, {
  93                 .name = "korina_dma_rx",
  94                 .start = ETH0_RX_DMA_ADDR,
  95                 .end = ETH0_RX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
  96                 .flags = IORESOURCE_MEM,
  97          }, {
  98                 .name = "korina_dma_tx",
  99                 .start = ETH0_TX_DMA_ADDR,
 100                 .end = ETH0_TX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
 101                 .flags = IORESOURCE_MEM,
 102          }
 103 };
 104
 105 static struct korina_device korina_dev0_data = {
 106         .name = "korina0",
 107         .mac = {0xde, 0xca, 0xff, 0xc0, 0xff, 0xee}
 108 };
 109
 110 static struct platform_device korina_dev0 = {
 111         .id = -1,
 112         .name = "korina",
 113         .dev.driver_data = &korina_dev0_data,
 114         .resource = korina_dev0_res,
 115         .num_resources = ARRAY_SIZE(korina_dev0_res),
 116 };
 117
 118 static struct resource cf_slot0_res[] = {
 119         {
 120                 .name = "cf_membase",
 121                 .flags = IORESOURCE_MEM
 122         }, {
 123                 .name = "cf_irq",
 124                 .start = (8 + 4 * 32 + CF_GPIO_NUM),    /* 149 */
 125                 .end = (8 + 4 * 32 + CF_GPIO_NUM),
 126                 .flags = IORESOURCE_IRQ
 127         }
 128 };
 129
 130 static struct cf_device cf_slot0_data = {
 131         .gpio_pin = CF_GPIO_NUM
 132 };
 133
 134 static struct platform_device cf_slot0 = {
 135         .id = -1,
 136         .name = "pata-rb532-cf",
 137         .dev.platform_data = &cf_slot0_data,
 138         .resource = cf_slot0_res,
 139         .num_resources = ARRAY_SIZE(cf_slot0_res),
 140 };
 141
 142 /* Resources and device for NAND */
 143 static int rb532_dev_ready(struct mtd_info *mtd)
 144 {
 145         return gpio_get_value(GPIO_RDY);
 146 }
 147
 148 static void rb532_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
 149 {
 150         struct nand_chip *chip = mtd->priv;
 151         unsigned char orbits, nandbits;
 152
 153         if (ctrl & NAND_CTRL_CHANGE) {
 154                 orbits = (ctrl & NAND_CLE) << 1;
 155                 orbits |= (ctrl & NAND_ALE) >> 1;
 156
 157                 nandbits = (~ctrl & NAND_CLE) << 1;
 158                 nandbits |= (~ctrl & NAND_ALE) >> 1;
 159
 160                 set_latch_u5(orbits, nandbits);
 161         }
 162         if (cmd != NAND_CMD_NONE)
 163                 writeb(cmd, chip->IO_ADDR_W);
 164 }
 165
 166 static struct resource nand_slot0_res[] = {
 167         [0] = {
 168                 .name = "nand_membase",
 169                 .flags = IORESOURCE_MEM
 170         }
 171 };
 172
 173 static struct platform_nand_data rb532_nand_data = {
 174         .ctrl.dev_ready = rb532_dev_ready,
 175         .ctrl.cmd_ctrl  = rb532_cmd_ctrl,
 176 };
 177
 178 static struct platform_device nand_slot0 = {
 179         .name = "gen_nand",
 180         .id = -1,
 181         .resource = nand_slot0_res,
 182         .num_resources = ARRAY_SIZE(nand_slot0_res),
 183         .dev.platform_data = &rb532_nand_data,
 184 };
 185
 186 static struct mtd_partition rb532_partition_info[] = {
 187         {
 188                 .name = "Routerboard NAND boot",
 189                 .offset = 0,
 190                 .size = 4 * 1024 * 1024,
 191         }, {
 192                 .name = "rootfs",
 193                 .offset = MTDPART_OFS_NXTBLK,
 194                 .size = MTDPART_SIZ_FULL,
 195         }
 196 };
 197
 198 static struct platform_device rb532_led = {
 199         .name = "rb532-led",
 200         .id = -1,
 201 };
 202
 203 static struct gpio_keys_button rb532_gpio_btn[] = {
 204         {
 205                 .gpio = 1,
 206                 .code = BTN_0,
 207                 .desc = "S1",
 208                 .active_low = 1,
 209         }
 210 };
 211
 212 static struct gpio_keys_platform_data rb532_gpio_btn_data = {
 213         .buttons = rb532_gpio_btn,
 214         .nbuttons = ARRAY_SIZE(rb532_gpio_btn),
 215 };
 216
 217 static struct platform_device rb532_button = {
 218         .name   = "gpio-keys",
 219         .id     = -1,
 220         .dev    = {
 221                 .platform_data = &rb532_gpio_btn_data,
 222         }
 223 };
 224
 225 static struct resource rb532_wdt_res[] = {
 226         {
 227                 .name = "rb532_wdt_res",
 228                 .start = INTEG0_BASE_ADDR,
 229                 .end = INTEG0_BASE_ADDR + sizeof(struct integ),
 230                 .flags = IORESOURCE_MEM,
 231         }
 232 };
 233
 234 static struct platform_device rb532_wdt = {
 235         .name           = "rc32434_wdt",
 236         .id             = -1,
 237         .resource       = rb532_wdt_res,
 238         .num_resources  = ARRAY_SIZE(rb532_wdt_res),
 239 };
 240
 241 static struct plat_serial8250_port rb532_uart_res[] = {
 242         {
 243                 .membase        = (char *)KSEG1ADDR(REGBASE + UART0BASE),
 244                 .irq            = UART0_IRQ,
 245                 .regshift       = 2,
 246                 .iotype         = UPIO_MEM,
 247                 .flags          = UPF_BOOT_AUTOCONF,
 248         },
 249         {
 250                 .flags          = 0,
 251         }
 252 };
 253
 254 static struct platform_device rb532_uart = {
 255         .name              = "serial8250",
 256         .id                = PLAT8250_DEV_PLATFORM,
 257         .dev.platform_data = &rb532_uart_res,
 258 };
 259
 260 static struct platform_device *rb532_devs[] = {
 261         &korina_dev0,
 262         &nand_slot0,
 263         &cf_slot0,
 264         &rb532_led,
 265         &rb532_button,
 266         &rb532_uart,
 267         &rb532_wdt
 268 };
 269
 270 static void __init parse_mac_addr(char *macstr)
 271 {
 272         int i, j;
 273         unsigned char result, value;
 274
 275         for (i = 0; i < 6; i++) {
 276                 result = 0;
 277
 278                 if (i != 5 && *(macstr + 2) != ':')
 279                         return;
 280
 281                 for (j = 0; j < 2; j++) {
 282                         if (isxdigit(*macstr)
 283                             && (value =
 284                                 isdigit(*macstr) ? *macstr -
 285                                 '0' : toupper(*macstr) - 'A' + 10) < 16) {
 286                                 result = result * 16 + value;
 287                                 macstr++;
 288                         } else
 289                                 return;
 290                 }
 291
 292                 macstr++;
 293                 korina_dev0_data.mac[i] = result;
 294         }
 295 }
 296
 297
 298 /* NAND definitions */
 299 #define NAND_CHIP_DELAY 25
 300
 301 static void __init rb532_nand_setup(void)
 302 {
 303         switch (mips_machtype) {
 304         case MACH_MIKROTIK_RB532A:
 305                 set_latch_u5(LO_FOFF | LO_CEX,
 306                                 LO_ULED | LO_ALE | LO_CLE | LO_WPX);
 307                 break;
 308         default:
 309                 set_latch_u5(LO_WPX | LO_FOFF | LO_CEX,
 310                                 LO_ULED | LO_ALE | LO_CLE);
 311                 break;
 312         }
 313
 314         /* Setup NAND specific settings */
 315         rb532_nand_data.chip.nr_chips = 1;
 316         rb532_nand_data.chip.nr_partitions = ARRAY_SIZE(rb532_partition_info);
 317         rb532_nand_data.chip.partitions = rb532_partition_info;
 318         rb532_nand_data.chip.chip_delay = NAND_CHIP_DELAY;
 319         rb532_nand_data.chip.options = NAND_NO_AUTOINCR;
 320 }
 321
 322
 323 static int __init plat_setup_devices(void)
 324 {
 325         /* Look for the CF card reader */
 326         if (!readl(IDT434_REG_BASE + DEV1MASK))
 327                 rb532_devs[2] = NULL;   /* disable cf_slot0 at index 2 */
 328         else {
 329                 cf_slot0_res[0].start =
 330                     readl(IDT434_REG_BASE + DEV1BASE);
 331                 cf_slot0_res[0].end = cf_slot0_res[0].start + 0x1000;
 332         }
 333
 334         /* Read the NAND resources from the device controller */
 335         nand_slot0_res[0].start = readl(IDT434_REG_BASE + DEV2BASE);
 336         nand_slot0_res[0].end = nand_slot0_res[0].start + 0x1000;
 337
 338         /* Read and map device controller 3 */
 339         dev3.base = ioremap_nocache(readl(IDT434_REG_BASE + DEV3BASE), 1);
 340
 341         if (!dev3.base) {
 342                 printk(KERN_ERR "rb532: cannot remap device controller 3\n");
 343                 return -ENXIO;
 344         }
 345
 346         /* Initialise the NAND device */
 347         rb532_nand_setup();
 348
 349         /* set the uart clock to the current cpu frequency */
 350         rb532_uart_res[0].uartclk = idt_cpu_freq;
 351
 352         return platform_add_devices(rb532_devs, ARRAY_SIZE(rb532_devs));
 353 }
 354
 355 static int __init setup_kmac(char *s)
 356 {
 357         printk(KERN_INFO "korina mac = %s\n", s);
 358         parse_mac_addr(s);
 359         return 0;
 360 }
 361
 362 __setup("kmac=", setup_kmac);
 363
 364 arch_initcall(plat_setup_devices);