1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * RouterBoard 500 Platform devices 4 * 5 * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> 6 * Copyright (C) 2007 Florian Fainelli <florian@openwrt.org> 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); 316