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/export.h>
  19 #include <linux/init.h>
  20 #include <linux/ctype.h>
  21 #include <linux/string.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/mtd/nand.h>
  24 #include <linux/mtd/mtd.h>
  25 #include <linux/mtd/partitions.h>
  26 #include <linux/gpio_keys.h>
  27 #include <linux/input.h>
  28 #include <linux/serial_8250.h>
  29
  30 #include <asm/bootinfo.h>
  31
  32 #include <asm/mach-rc32434/rc32434.h>
  33 #include <asm/mach-rc32434/dma.h>
  34 #include <asm/mach-rc32434/dma_v.h>
  35 #include <asm/mach-rc32434/eth.h>
  36 #include <asm/mach-rc32434/rb.h>
  37 #include <asm/mach-rc32434/integ.h>
  38 #include <asm/mach-rc32434/gpio.h>
  39 #include <asm/mach-rc32434/irq.h>
  40
  41 #define ETH0_RX_DMA_ADDR  (DMA0_BASE_ADDR + 0 * DMA_CHAN_OFFSET)
  42 #define ETH0_TX_DMA_ADDR  (DMA0_BASE_ADDR + 1 * DMA_CHAN_OFFSET)
  43
  44 extern unsigned int idt_cpu_freq;
  45
  46 static struct mpmc_device dev3;
  47
  48 void set_latch_u5(unsigned char or_mask, unsigned char nand_mask)
  49 {
  50         unsigned long flags;
  51
  52         spin_lock_irqsave(&dev3.lock, flags);
  53
  54         dev3.state = (dev3.state | or_mask) & ~nand_mask;
  55         writeb(dev3.state, dev3.base);
  56
  57         spin_unlock_irqrestore(&dev3.lock, flags);
  58 }
  59 EXPORT_SYMBOL(set_latch_u5);
  60
  61 unsigned char get_latch_u5(void)
  62 {
  63         return dev3.state;
  64 }
  65 EXPORT_SYMBOL(get_latch_u5);
  66
  67 static struct resource korina_dev0_res[] = {
  68         {
  69                 .name = "korina_regs",
  70                 .start = ETH0_BASE_ADDR,
  71                 .end = ETH0_BASE_ADDR + sizeof(struct eth_regs),
  72                 .flags = IORESOURCE_MEM,
  73          }, {
  74                 .name = "korina_rx",
  75                 .start = ETH0_DMA_RX_IRQ,
  76                 .end = ETH0_DMA_RX_IRQ,
  77                 .flags = IORESOURCE_IRQ
  78         }, {
  79                 .name = "korina_tx",
  80                 .start = ETH0_DMA_TX_IRQ,
  81                 .end = ETH0_DMA_TX_IRQ,
  82                 .flags = IORESOURCE_IRQ
  83         }, {
  84                 .name = "korina_ovr",
  85                 .start = ETH0_RX_OVR_IRQ,
  86                 .end = ETH0_RX_OVR_IRQ,
  87                 .flags = IORESOURCE_IRQ
  88         }, {
  89                 .name = "korina_und",
  90                 .start = ETH0_TX_UND_IRQ,
  91                 .end = ETH0_TX_UND_IRQ,
  92                 .flags = IORESOURCE_IRQ
  93         }, {
  94                 .name = "korina_dma_rx",
  95                 .start = ETH0_RX_DMA_ADDR,
  96                 .end = ETH0_RX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
  97                 .flags = IORESOURCE_MEM,
  98          }, {
  99                 .name = "korina_dma_tx",
 100                 .start = ETH0_TX_DMA_ADDR,
 101                 .end = ETH0_TX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
 102                 .flags = IORESOURCE_MEM,
 103          }
 104 };
 105
 106 static struct korina_device korina_dev0_data = {
 107         .name = "korina0",
 108         .mac = {0xde, 0xca, 0xff, 0xc0, 0xff, 0xee}
 109 };
 110
 111 static struct platform_device korina_dev0 = {
 112         .id = -1,
 113         .name = "korina",
 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 platform_device rb532_button = {
 204         .name   = "rb532-button",
 205         .id     = -1,
 206 };
 207
 208 static struct resource rb532_wdt_res[] = {
 209         {
 210                 .name = "rb532_wdt_res",
 211                 .start = INTEG0_BASE_ADDR,
 212                 .end = INTEG0_BASE_ADDR + sizeof(struct integ),
 213                 .flags = IORESOURCE_MEM,
 214         }
 215 };
 216
 217 static struct platform_device rb532_wdt = {
 218         .name           = "rc32434_wdt",
 219         .id             = -1,
 220         .resource       = rb532_wdt_res,
 221         .num_resources  = ARRAY_SIZE(rb532_wdt_res),
 222 };
 223
 224 static struct plat_serial8250_port rb532_uart_res[] = {
 225         {
 226                 .membase        = (char *)KSEG1ADDR(REGBASE + UART0BASE),
 227                 .irq            = UART0_IRQ,
 228                 .regshift       = 2,
 229                 .iotype         = UPIO_MEM,
 230                 .flags          = UPF_BOOT_AUTOCONF,
 231         },
 232         {
 233                 .flags          = 0,
 234         }
 235 };
 236
 237 static struct platform_device rb532_uart = {
 238         .name              = "serial8250",
 239         .id                = PLAT8250_DEV_PLATFORM,
 240         .dev.platform_data = &rb532_uart_res,
 241 };
 242
 243 static struct platform_device *rb532_devs[] = {
 244         &korina_dev0,
 245         &nand_slot0,
 246         &cf_slot0,
 247         &rb532_led,
 248         &rb532_button,
 249         &rb532_uart,
 250         &rb532_wdt
 251 };
 252
 253 static void __init parse_mac_addr(char *macstr)
 254 {
 255         int i, h, l;
 256
 257         for (i = 0; i < 6; i++) {
 258                 if (i != 5 && *(macstr + 2) != ':')
 259                         return;
 260
 261                 h = hex_to_bin(*macstr++);
 262                 if (h == -1)
 263                         return;
 264
 265                 l = hex_to_bin(*macstr++);
 266                 if (l == -1)
 267                         return;
 268
 269                 macstr++;
 270                 korina_dev0_data.mac[i] = (h << 4) + l;
 271         }
 272 }
 273
 274
 275 /* NAND definitions */
 276 #define NAND_CHIP_DELAY 25
 277
 278 static void __init rb532_nand_setup(void)
 279 {
 280         switch (mips_machtype) {
 281         case MACH_MIKROTIK_RB532A:
 282                 set_latch_u5(LO_FOFF | LO_CEX,
 283                                 LO_ULED | LO_ALE | LO_CLE | LO_WPX);
 284                 break;
 285         default:
 286                 set_latch_u5(LO_WPX | LO_FOFF | LO_CEX,
 287                                 LO_ULED | LO_ALE | LO_CLE);
 288                 break;
 289         }
 290
 291         /* Setup NAND specific settings */
 292         rb532_nand_data.chip.nr_chips = 1;
 293         rb532_nand_data.chip.nr_partitions = ARRAY_SIZE(rb532_partition_info);
 294         rb532_nand_data.chip.partitions = rb532_partition_info;
 295         rb532_nand_data.chip.chip_delay = NAND_CHIP_DELAY;
 296 }
 297
 298
 299 static int __init plat_setup_devices(void)
 300 {
 301         /* Look for the CF card reader */
 302         if (!readl(IDT434_REG_BASE + DEV1MASK))
 303                 rb532_devs[2] = NULL;   /* disable cf_slot0 at index 2 */
 304         else {
 305                 cf_slot0_res[0].start =
 306                     readl(IDT434_REG_BASE + DEV1BASE);
 307                 cf_slot0_res[0].end = cf_slot0_res[0].start + 0x1000;
 308         }
 309
 310         /* Read the NAND resources from the device controller */
 311         nand_slot0_res[0].start = readl(IDT434_REG_BASE + DEV2BASE);
 312         nand_slot0_res[0].end = nand_slot0_res[0].start + 0x1000;
 313
 314         /* Read and map device controller 3 */
 315         dev3.base = ioremap_nocache(readl(IDT434_REG_BASE + DEV3BASE), 1);
 316
 317         if (!dev3.base) {
 318                 printk(KERN_ERR "rb532: cannot remap device controller 3\n");
 319                 return -ENXIO;
 320         }
 321
 322         /* Initialise the NAND device */
 323         rb532_nand_setup();
 324
 325         /* set the uart clock to the current cpu frequency */
 326         rb532_uart_res[0].uartclk = idt_cpu_freq;
 327
 328         dev_set_drvdata(&korina_dev0.dev, &korina_dev0_data);
 329
 330         return platform_add_devices(rb532_devs, ARRAY_SIZE(rb532_devs));
 331 }
 332
 333 static int __init setup_kmac(char *s)
 334 {
 335         printk(KERN_INFO "korina mac = %s\n", s);
 336         parse_mac_addr(s);
 337         return 0;
 338 }
 339
 340 __setup("kmac=", setup_kmac);
 341
 342 arch_initcall(plat_setup_devices);