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/rawnand.h>
  24 #include <linux/mtd/mtd.h>
  25 #include <linux/mtd/partitions.h>
  26 #include <linux/gpio.h>
  27 #include <linux/gpio_keys.h>
  28 #include <linux/input.h>
  29 #include <linux/serial_8250.h>
  30
  31 #include <asm/bootinfo.h>
  32
  33 #include <asm/mach-rc32434/rc32434.h>
  34 #include <asm/mach-rc32434/dma.h>
  35 #include <asm/mach-rc32434/dma_v.h>
  36 #include <asm/mach-rc32434/eth.h>
  37 #include <asm/mach-rc32434/rb.h>
  38 #include <asm/mach-rc32434/integ.h>
  39 #include <asm/mach-rc32434/gpio.h>
  40 #include <asm/mach-rc32434/irq.h>
  41
  42 #define ETH0_RX_DMA_ADDR  (DMA0_BASE_ADDR + 0 * DMA_CHAN_OFFSET)
  43 #define ETH0_TX_DMA_ADDR  (DMA0_BASE_ADDR + 1 * DMA_CHAN_OFFSET)
  44
  45 extern unsigned int idt_cpu_freq;
  46
  47 static struct mpmc_device dev3;
  48
  49 void set_latch_u5(unsigned char or_mask, unsigned char nand_mask)
  50 {
  51         unsigned long flags;
  52
  53         spin_lock_irqsave(&dev3.lock, flags);
  54
  55         dev3.state = (dev3.state | or_mask) & ~nand_mask;
  56         writeb(dev3.state, dev3.base);
  57
  58         spin_unlock_irqrestore(&dev3.lock, flags);
  59 }
  60 EXPORT_SYMBOL(set_latch_u5);
  61
  62 unsigned char get_latch_u5(void)
  63 {
  64         return dev3.state;
  65 }
  66 EXPORT_SYMBOL(get_latch_u5);
  67
  68 static struct resource korina_dev0_res[] = {
  69         {
  70                 .name = "korina_regs",
  71                 .start = ETH0_BASE_ADDR,
  72                 .end = ETH0_BASE_ADDR + sizeof(struct eth_regs),
  73                 .flags = IORESOURCE_MEM,
  74          }, {
  75                 .name = "korina_rx",
  76                 .start = ETH0_DMA_RX_IRQ,
  77                 .end = ETH0_DMA_RX_IRQ,
  78                 .flags = IORESOURCE_IRQ
  79         }, {
  80                 .name = "korina_tx",
  81                 .start = ETH0_DMA_TX_IRQ,
  82                 .end = ETH0_DMA_TX_IRQ,
  83                 .flags = IORESOURCE_IRQ
  84         }, {
  85                 .name = "korina_ovr",
  86                 .start = ETH0_RX_OVR_IRQ,
  87                 .end = ETH0_RX_OVR_IRQ,
  88                 .flags = IORESOURCE_IRQ
  89         }, {
  90                 .name = "korina_und",
  91                 .start = ETH0_TX_UND_IRQ,
  92                 .end = ETH0_TX_UND_IRQ,
  93                 .flags = IORESOURCE_IRQ
  94         }, {
  95                 .name = "korina_dma_rx",
  96                 .start = ETH0_RX_DMA_ADDR,
  97                 .end = ETH0_RX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
  98                 .flags = IORESOURCE_MEM,
  99          }, {
 100                 .name = "korina_dma_tx",
 101                 .start = ETH0_TX_DMA_ADDR,
 102                 .end = ETH0_TX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
 103                 .flags = IORESOURCE_MEM,
 104          }
 105 };
 106
 107 static struct korina_device korina_dev0_data = {
 108         .name = "korina0",
 109         .mac = {0xde, 0xca, 0xff, 0xc0, 0xff, 0xee}
 110 };
 111
 112 static struct platform_device korina_dev0 = {
 113         .id = -1,
 114         .name = "korina",
 115         .resource = korina_dev0_res,
 116         .num_resources = ARRAY_SIZE(korina_dev0_res),
 117 };
 118
 119 static struct resource cf_slot0_res[] = {
 120         {
 121                 .name = "cf_membase",
 122                 .flags = IORESOURCE_MEM
 123         }, {
 124                 .name = "cf_irq",
 125                 .start = (8 + 4 * 32 + CF_GPIO_NUM),    /* 149 */
 126                 .end = (8 + 4 * 32 + CF_GPIO_NUM),
 127                 .flags = IORESOURCE_IRQ
 128         }
 129 };
 130
 131 static struct cf_device cf_slot0_data = {
 132         .gpio_pin = CF_GPIO_NUM
 133 };
 134
 135 static struct platform_device cf_slot0 = {
 136         .id = -1,
 137         .name = "pata-rb532-cf",
 138         .dev.platform_data = &cf_slot0_data,
 139         .resource = cf_slot0_res,
 140         .num_resources = ARRAY_SIZE(cf_slot0_res),
 141 };
 142
 143 /* Resources and device for NAND */
 144 static int rb532_dev_ready(struct mtd_info *mtd)
 145 {
 146         return gpio_get_value(GPIO_RDY);
 147 }
 148
 149 static void rb532_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
 150 {
 151         struct nand_chip *chip = mtd_to_nand(mtd);
 152         unsigned char orbits, nandbits;
 153
 154         if (ctrl & NAND_CTRL_CHANGE) {
 155                 orbits = (ctrl & NAND_CLE) << 1;
 156                 orbits |= (ctrl & NAND_ALE) >> 1;
 157
 158                 nandbits = (~ctrl & NAND_CLE) << 1;
 159                 nandbits |= (~ctrl & NAND_ALE) >> 1;
 160
 161                 set_latch_u5(orbits, nandbits);
 162         }
 163         if (cmd != NAND_CMD_NONE)
 164                 writeb(cmd, chip->IO_ADDR_W);
 165 }
 166
 167 static struct resource nand_slot0_res[] = {
 168         [0] = {
 169                 .name = "nand_membase",
 170                 .flags = IORESOURCE_MEM
 171         }
 172 };
 173
 174 static struct platform_nand_data rb532_nand_data = {
 175         .ctrl.dev_ready = rb532_dev_ready,
 176         .ctrl.cmd_ctrl  = rb532_cmd_ctrl,
 177 };
 178
 179 static struct platform_device nand_slot0 = {
 180         .name = "gen_nand",
 181         .id = -1,
 182         .resource = nand_slot0_res,
 183         .num_resources = ARRAY_SIZE(nand_slot0_res),
 184         .dev.platform_data = &rb532_nand_data,
 185 };
 186
 187 static struct mtd_partition rb532_partition_info[] = {
 188         {
 189                 .name = "Routerboard NAND boot",
 190                 .offset = 0,
 191                 .size = 4 * 1024 * 1024,
 192         }, {
 193                 .name = "rootfs",
 194                 .offset = MTDPART_OFS_NXTBLK,
 195                 .size = MTDPART_SIZ_FULL,
 196         }
 197 };
 198
 199 static struct platform_device rb532_led = {
 200         .name = "rb532-led",
 201         .id = -1,
 202 };
 203
 204 static struct platform_device rb532_button = {
 205         .name   = "rb532-button",
 206         .id     = -1,
 207 };
 208
 209 static struct resource rb532_wdt_res[] = {
 210         {
 211                 .name = "rb532_wdt_res",
 212                 .start = INTEG0_BASE_ADDR,
 213                 .end = INTEG0_BASE_ADDR + sizeof(struct integ),
 214                 .flags = IORESOURCE_MEM,
 215         }
 216 };
 217
 218 static struct platform_device rb532_wdt = {
 219         .name           = "rc32434_wdt",
 220         .id             = -1,
 221         .resource       = rb532_wdt_res,
 222         .num_resources  = ARRAY_SIZE(rb532_wdt_res),
 223 };
 224
 225 static struct plat_serial8250_port rb532_uart_res[] = {
 226         {
 227                 .type           = PORT_16550A,
 228                 .membase        = (char *)KSEG1ADDR(REGBASE + UART0BASE),
 229                 .irq            = UART0_IRQ,
 230                 .regshift       = 2,
 231                 .iotype         = UPIO_MEM,
 232                 .flags          = UPF_BOOT_AUTOCONF,
 233         },
 234         {
 235                 .flags          = 0,
 236         }
 237 };
 238
 239 static struct platform_device rb532_uart = {
 240         .name              = "serial8250",
 241         .id                = PLAT8250_DEV_PLATFORM,
 242         .dev.platform_data = &rb532_uart_res,
 243 };
 244
 245 static struct platform_device *rb532_devs[] = {
 246         &korina_dev0,
 247         &nand_slot0,
 248         &cf_slot0,
 249         &rb532_led,
 250         &rb532_button,
 251         &rb532_uart,
 252         &rb532_wdt
 253 };
 254
 255 /* NAND definitions */
 256 #define NAND_CHIP_DELAY 25
 257
 258 static void __init rb532_nand_setup(void)
 259 {
 260         switch (mips_machtype) {
 261         case MACH_MIKROTIK_RB532A:
 262                 set_latch_u5(LO_FOFF | LO_CEX,
 263                                 LO_ULED | LO_ALE | LO_CLE | LO_WPX);
 264                 break;
 265         default:
 266                 set_latch_u5(LO_WPX | LO_FOFF | LO_CEX,
 267                                 LO_ULED | LO_ALE | LO_CLE);
 268                 break;
 269         }
 270
 271         /* Setup NAND specific settings */
 272         rb532_nand_data.chip.nr_chips = 1;
 273         rb532_nand_data.chip.nr_partitions = ARRAY_SIZE(rb532_partition_info);
 274         rb532_nand_data.chip.partitions = rb532_partition_info;
 275         rb532_nand_data.chip.chip_delay = NAND_CHIP_DELAY;
 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         /* Read and map device controller 3 */
 295         dev3.base = ioremap_nocache(readl(IDT434_REG_BASE + DEV3BASE), 1);
 296
 297         if (!dev3.base) {
 298                 printk(KERN_ERR "rb532: cannot remap device controller 3\n");
 299                 return -ENXIO;
 300         }
 301
 302         /* Initialise the NAND device */
 303         rb532_nand_setup();
 304
 305         /* set the uart clock to the current cpu frequency */
 306         rb532_uart_res[0].uartclk = idt_cpu_freq;
 307
 308         dev_set_drvdata(&korina_dev0.dev, &korina_dev0_data);
 309
 310         return platform_add_devices(rb532_devs, ARRAY_SIZE(rb532_devs));
 311 }
 312
 313 static int __init setup_kmac(char *s)
 314 {
 315         printk(KERN_INFO "korina mac = %s\n", s);
 316         if (!mac_pton(s, korina_dev0_data.mac)) {
 317                 printk(KERN_ERR "Invalid mac\n");
 318                 return -EINVAL;
 319         }
 320         return 0;
 321 }
 322
 323 __setup("kmac=", setup_kmac);
 324
 325 arch_initcall(plat_setup_devices);