arch/mips/rb532/devices.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  RouterBoard 500 Platform devices
   4  *
   5  *  Copyright (C) 2006 Felix Fietkau <[email protected]>
   6  *  Copyright (C) 2007 Florian Fainelli <[email protected]>
   7  */
   8 #include <linux/kernel.h>
   9 #include <linux/export.h>
  10 #include <linux/init.h>
  11 #include <linux/ctype.h>
  12 #include <linux/string.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/mtd/platnand.h>
  15 #include <linux/mtd/mtd.h>
  16 #include <linux/gpio.h>
  17 #include <linux/gpio/machine.h>
  18 #include <linux/gpio_keys.h>
  19 #include <linux/input.h>
  20 #include <linux/serial_8250.h>
  21
  22 #include <asm/bootinfo.h>
  23
  24 #include <asm/mach-rc32434/rc32434.h>
  25 #include <asm/mach-rc32434/dma.h>
  26 #include <asm/mach-rc32434/dma_v.h>
  27 #include <asm/mach-rc32434/eth.h>
  28 #include <asm/mach-rc32434/rb.h>
  29 #include <asm/mach-rc32434/integ.h>
  30 #include <asm/mach-rc32434/gpio.h>
  31 #include <asm/mach-rc32434/irq.h>
  32
  33 #define ETH0_RX_DMA_ADDR  (DMA0_BASE_ADDR + 0 * DMA_CHAN_OFFSET)
  34 #define ETH0_TX_DMA_ADDR  (DMA0_BASE_ADDR + 1 * DMA_CHAN_OFFSET)
  35
  36 extern unsigned int idt_cpu_freq;
  37
  38 static struct mpmc_device dev3;
  39
  40 void set_latch_u5(unsigned char or_mask, unsigned char nand_mask)
  41 {
  42         unsigned long flags;
  43
  44         spin_lock_irqsave(&dev3.lock, flags);
  45
  46         dev3.state = (dev3.state | or_mask) & ~nand_mask;
  47         writeb(dev3.state, dev3.base);
  48
  49         spin_unlock_irqrestore(&dev3.lock, flags);
  50 }
  51 EXPORT_SYMBOL(set_latch_u5);
  52
  53 unsigned char get_latch_u5(void)
  54 {
  55         return dev3.state;
  56 }
  57 EXPORT_SYMBOL(get_latch_u5);
  58
  59 static struct resource korina_dev0_res[] = {
  60         {
  61                 .name = "emac",
  62                 .start = ETH0_BASE_ADDR,
  63                 .end = ETH0_BASE_ADDR + sizeof(struct eth_regs),
  64                 .flags = IORESOURCE_MEM,
  65          }, {
  66                 .name = "rx",
  67                 .start = ETH0_DMA_RX_IRQ,
  68                 .end = ETH0_DMA_RX_IRQ,
  69                 .flags = IORESOURCE_IRQ
  70         }, {
  71                 .name = "tx",
  72                 .start = ETH0_DMA_TX_IRQ,
  73                 .end = ETH0_DMA_TX_IRQ,
  74                 .flags = IORESOURCE_IRQ
  75         }, {
  76                 .name = "dma_rx",
  77                 .start = ETH0_RX_DMA_ADDR,
  78                 .end = ETH0_RX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
  79                 .flags = IORESOURCE_MEM,
  80          }, {
  81                 .name = "dma_tx",
  82                 .start = ETH0_TX_DMA_ADDR,
  83                 .end = ETH0_TX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
  84                 .flags = IORESOURCE_MEM,
  85          }
  86 };
  87
  88 static struct korina_device korina_dev0_data = {
  89         .name = "korina0",
  90         .mac = {0xde, 0xca, 0xff, 0xc0, 0xff, 0xee}
  91 };
  92
  93 static struct platform_device korina_dev0 = {
  94         .id = -1,
  95         .name = "korina",
  96         .resource = korina_dev0_res,
  97         .num_resources = ARRAY_SIZE(korina_dev0_res),
  98         .dev = {
  99                 .platform_data = &korina_dev0_data.mac,
 100         }
 101 };
 102
 103 static struct resource cf_slot0_res[] = {
 104         {
 105                 .name = "cf_membase",
 106                 .flags = IORESOURCE_MEM
 107         }, {
 108                 .name = "cf_irq",
 109                 .start = (8 + 4 * 32 + CF_GPIO_NUM),    /* 149 */
 110                 .end = (8 + 4 * 32 + CF_GPIO_NUM),
 111                 .flags = IORESOURCE_IRQ
 112         }
 113 };
 114
 115 static struct gpiod_lookup_table cf_slot0_gpio_table = {
 116         .dev_id = "pata-rb532-cf",
 117         .table = {
 118                 GPIO_LOOKUP("gpio0", CF_GPIO_NUM,
 119                             NULL, GPIO_ACTIVE_HIGH),
 120                 { },
 121         },
 122 };
 123
 124 static struct platform_device cf_slot0 = {
 125         .id = -1,
 126         .name = "pata-rb532-cf",
 127         .resource = cf_slot0_res,
 128         .num_resources = ARRAY_SIZE(cf_slot0_res),
 129 };
 130
 131 /* Resources and device for NAND */
 132 static int rb532_dev_ready(struct nand_chip *chip)
 133 {
 134         return gpio_get_value(GPIO_RDY);
 135 }
 136
 137 static void rb532_cmd_ctrl(struct nand_chip *chip, int cmd, unsigned int ctrl)
 138 {
 139         unsigned char orbits, nandbits;
 140
 141         if (ctrl & NAND_CTRL_CHANGE) {
 142                 orbits = (ctrl & NAND_CLE) << 1;
 143                 orbits |= (ctrl & NAND_ALE) >> 1;
 144
 145                 nandbits = (~ctrl & NAND_CLE) << 1;
 146                 nandbits |= (~ctrl & NAND_ALE) >> 1;
 147
 148                 set_latch_u5(orbits, nandbits);
 149         }
 150         if (cmd != NAND_CMD_NONE)
 151                 writeb(cmd, chip->legacy.IO_ADDR_W);
 152 }
 153
 154 static struct resource nand_slot0_res[] = {
 155         [0] = {
 156                 .name = "nand_membase",
 157                 .flags = IORESOURCE_MEM
 158         }
 159 };
 160
 161 static struct platform_nand_data rb532_nand_data = {
 162         .ctrl.dev_ready = rb532_dev_ready,
 163         .ctrl.cmd_ctrl  = rb532_cmd_ctrl,
 164 };
 165
 166 static struct platform_device nand_slot0 = {
 167         .name = "gen_nand",
 168         .id = -1,
 169         .resource = nand_slot0_res,
 170         .num_resources = ARRAY_SIZE(nand_slot0_res),
 171         .dev.platform_data = &rb532_nand_data,
 172 };
 173
 174 static struct mtd_partition rb532_partition_info[] = {
 175         {
 176                 .name = "Routerboard NAND boot",
 177                 .offset = 0,
 178                 .size = 4 * 1024 * 1024,
 179         }, {
 180                 .name = "rootfs",
 181                 .offset = MTDPART_OFS_NXTBLK,
 182                 .size = MTDPART_SIZ_FULL,
 183         }
 184 };
 185
 186 static struct platform_device rb532_led = {
 187         .name = "rb532-led",
 188         .id = -1,
 189 };
 190
 191 static struct platform_device rb532_button = {
 192         .name   = "rb532-button",
 193         .id     = -1,
 194 };
 195
 196 static struct resource rb532_wdt_res[] = {
 197         {
 198                 .name = "rb532_wdt_res",
 199                 .start = INTEG0_BASE_ADDR,
 200                 .end = INTEG0_BASE_ADDR + sizeof(struct integ),
 201                 .flags = IORESOURCE_MEM,
 202         }
 203 };
 204
 205 static struct platform_device rb532_wdt = {
 206         .name           = "rc32434_wdt",
 207         .id             = -1,
 208         .resource       = rb532_wdt_res,
 209         .num_resources  = ARRAY_SIZE(rb532_wdt_res),
 210 };
 211
 212 static struct plat_serial8250_port rb532_uart_res[] = {
 213         {
 214                 .type           = PORT_16550A,
 215                 .membase        = (char *)KSEG1ADDR(REGBASE + UART0BASE),
 216                 .irq            = UART0_IRQ,
 217                 .regshift       = 2,
 218                 .iotype         = UPIO_MEM,
 219                 .flags          = UPF_BOOT_AUTOCONF,
 220         },
 221         {
 222                 .flags          = 0,
 223         }
 224 };
 225
 226 static struct platform_device rb532_uart = {
 227         .name              = "serial8250",
 228         .id                = PLAT8250_DEV_PLATFORM,
 229         .dev.platform_data = &rb532_uart_res,
 230 };
 231
 232 static struct platform_device *rb532_devs[] = {
 233         &korina_dev0,
 234         &nand_slot0,
 235         &cf_slot0,
 236         &rb532_led,
 237         &rb532_button,
 238         &rb532_uart,
 239         &rb532_wdt
 240 };
 241
 242 /* NAND definitions */
 243 #define NAND_CHIP_DELAY 25
 244
 245 static void __init rb532_nand_setup(void)
 246 {
 247         switch (mips_machtype) {
 248         case MACH_MIKROTIK_RB532A:
 249                 set_latch_u5(LO_FOFF | LO_CEX,
 250                                 LO_ULED | LO_ALE | LO_CLE | LO_WPX);
 251                 break;
 252         default:
 253                 set_latch_u5(LO_WPX | LO_FOFF | LO_CEX,
 254                                 LO_ULED | LO_ALE | LO_CLE);
 255                 break;
 256         }
 257
 258         /* Setup NAND specific settings */
 259         rb532_nand_data.chip.nr_chips = 1;
 260         rb532_nand_data.chip.nr_partitions = ARRAY_SIZE(rb532_partition_info);
 261         rb532_nand_data.chip.partitions = rb532_partition_info;
 262         rb532_nand_data.chip.chip_delay = NAND_CHIP_DELAY;
 263 }
 264
 265
 266 static int __init plat_setup_devices(void)
 267 {
 268         /* Look for the CF card reader */
 269         if (!readl(IDT434_REG_BASE + DEV1MASK))
 270                 rb532_devs[2] = NULL;   /* disable cf_slot0 at index 2 */
 271         else {
 272                 cf_slot0_res[0].start =
 273                     readl(IDT434_REG_BASE + DEV1BASE);
 274                 cf_slot0_res[0].end = cf_slot0_res[0].start + 0x1000;
 275         }
 276
 277         /* Read the NAND resources from the device controller */
 278         nand_slot0_res[0].start = readl(IDT434_REG_BASE + DEV2BASE);
 279         nand_slot0_res[0].end = nand_slot0_res[0].start + 0x1000;
 280
 281         /* Read and map device controller 3 */
 282         dev3.base = ioremap(readl(IDT434_REG_BASE + DEV3BASE), 1);
 283
 284         if (!dev3.base) {
 285                 printk(KERN_ERR "rb532: cannot remap device controller 3\n");
 286                 return -ENXIO;
 287         }
 288
 289         /* Initialise the NAND device */
 290         rb532_nand_setup();
 291
 292         /* set the uart clock to the current cpu frequency */
 293         rb532_uart_res[0].uartclk = idt_cpu_freq;
 294
 295         gpiod_add_lookup_table(&cf_slot0_gpio_table);
 296         return platform_add_devices(rb532_devs, ARRAY_SIZE(rb532_devs));
 297 }
 298
 299 #ifdef CONFIG_NET
 300
 301 static int __init setup_kmac(char *s)
 302 {
 303         printk(KERN_INFO "korina mac = %s\n", s);
 304         if (!mac_pton(s, korina_dev0_data.mac)) {
 305                 printk(KERN_ERR "Invalid mac\n");
 306                 return -EINVAL;
 307         }
 308         return 0;
 309 }
 310
 311 __setup("kmac=", setup_kmac);
 312
 313 #endif /* CONFIG_NET */
 314
 315 arch_initcall(plat_setup_devices);