1/* 2 * Buffalo Terastation Pro II/Live Board Setup 3 * 4 * Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12#include <linux/kernel.h> 13#include <linux/init.h> 14#include <linux/platform_device.h> 15#include <linux/pci.h> 16#include <linux/irq.h> 17#include <linux/delay.h> 18#include <linux/mtd/physmap.h> 19#include <linux/mv643xx_eth.h> 20#include <linux/i2c.h> 21#include <linux/serial_reg.h> 22#include <asm/mach-types.h> 23#include <asm/gpio.h> 24#include <asm/mach/arch.h> 25#include <asm/mach/pci.h> 26#include <mach/orion5x.h> 27#include "common.h" 28#include "mpp.h" 29 30/***************************************************************************** 31 * Terastation Pro 2/Live Info 32 ****************************************************************************/ 33 34/* 35 * Terastation Pro 2 hardware : 36 * - Marvell 88F5281-D0 37 * - Marvell 88SX6042 SATA controller (PCI) 38 * - Marvell 88E1118 Gigabit Ethernet PHY 39 * - 256KB NOR flash 40 * - 128MB of DDR RAM 41 * - PCIe port (not equipped) 42 */ 43 44/* 45 * 256K NOR flash Device bus boot chip select 46 */ 47 48#define TSP2_NOR_BOOT_BASE 0xf4000000 49#define TSP2_NOR_BOOT_SIZE SZ_256K 50 51/***************************************************************************** 52 * 256KB NOR Flash on BOOT Device 53 ****************************************************************************/ 54 55static struct physmap_flash_data tsp2_nor_flash_data = { 56 .width = 1, 57}; 58 59static struct resource tsp2_nor_flash_resource = { 60 .flags = IORESOURCE_MEM, 61 .start = TSP2_NOR_BOOT_BASE, 62 .end = TSP2_NOR_BOOT_BASE + TSP2_NOR_BOOT_SIZE - 1, 63}; 64 65static struct platform_device tsp2_nor_flash = { 66 .name = "physmap-flash", 67 .id = 0, 68 .dev = { 69 .platform_data = &tsp2_nor_flash_data, 70 }, 71 .num_resources = 1, 72 .resource = &tsp2_nor_flash_resource, 73}; 74 75/***************************************************************************** 76 * PCI 77 ****************************************************************************/ 78#define TSP2_PCI_SLOT0_OFFS 7 79#define TSP2_PCI_SLOT0_IRQ_PIN 11 80 81void __init tsp2_pci_preinit(void) 82{ 83 int pin; 84 85 /* 86 * Configure PCI GPIO IRQ pins 87 */ 88 pin = TSP2_PCI_SLOT0_IRQ_PIN; 89 if (gpio_request(pin, "PCI Int1") == 0) { 90 if (gpio_direction_input(pin) == 0) { 91 set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW); 92 } else { 93 printk(KERN_ERR "tsp2_pci_preinit failed " 94 "to set_irq_type pin %d\n", pin); 95 gpio_free(pin); 96 } 97 } else { 98 printk(KERN_ERR "tsp2_pci_preinit failed to " 99 "gpio_request %d\n", pin); 100 } 101} 102 103static int __init tsp2_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin) 104{ 105 int irq; 106 107 /* 108 * Check for devices with hard-wired IRQs. 109 */ 110 irq = orion5x_pci_map_irq(dev, slot, pin); 111 if (irq != -1) 112 return irq; 113 114 /* 115 * PCI IRQs are connected via GPIOs. 116 */ 117 if (slot == TSP2_PCI_SLOT0_OFFS) 118 return gpio_to_irq(TSP2_PCI_SLOT0_IRQ_PIN); 119 120 return -1; 121} 122 123static struct hw_pci tsp2_pci __initdata = { 124 .nr_controllers = 2, 125 .preinit = tsp2_pci_preinit, 126 .swizzle = pci_std_swizzle, 127 .setup = orion5x_pci_sys_setup, 128 .scan = orion5x_pci_sys_scan_bus, 129 .map_irq = tsp2_pci_map_irq, 130}; 131 132static int __init tsp2_pci_init(void) 133{ 134 if (machine_is_terastation_pro2()) 135 pci_common_init(&tsp2_pci); 136 137 return 0; 138} 139 140subsys_initcall(tsp2_pci_init); 141 142/***************************************************************************** 143 * Ethernet 144 ****************************************************************************/ 145 146static struct mv643xx_eth_platform_data tsp2_eth_data = { 147 .phy_addr = 0, 148}; 149 150/***************************************************************************** 151 * RTC 5C372a on I2C bus 152 ****************************************************************************/ 153 154#define TSP2_RTC_GPIO 9 155 156static struct i2c_board_info __initdata tsp2_i2c_rtc = { 157 I2C_BOARD_INFO("rs5c372a", 0x32), 158}; 159 160/***************************************************************************** 161 * Terastation Pro II specific power off method via UART1-attached 162 * microcontroller 163 ****************************************************************************/ 164 165#define UART1_REG(x) (UART1_VIRT_BASE + ((UART_##x) << 2)) 166 167static int tsp2_miconread(unsigned char *buf, int count) 168{ 169 int i; 170 int timeout; 171 172 for (i = 0; i < count; i++) { 173 timeout = 10; 174 175 while (!(readl(UART1_REG(LSR)) & UART_LSR_DR)) { 176 if (--timeout == 0) 177 break; 178 udelay(1000); 179 } 180 181 if (timeout == 0) 182 break; 183 buf[i] = readl(UART1_REG(RX)); 184 } 185 186 /* return read bytes */ 187 return i; 188} 189 190static int tsp2_miconwrite(const unsigned char *buf, int count) 191{ 192 int i = 0; 193 194 while (count--) { 195 while (!(readl(UART1_REG(LSR)) & UART_LSR_THRE)) 196 barrier(); 197 writel(buf[i++], UART1_REG(TX)); 198 } 199 200 return 0; 201} 202 203static int tsp2_miconsend(const unsigned char *data, int count) 204{ 205 int i; 206 unsigned char checksum = 0; 207 unsigned char recv_buf[40]; 208 unsigned char send_buf[40]; 209 unsigned char correct_ack[3]; 210 int retry = 2; 211 212 /* Generate checksum */ 213 for (i = 0; i < count; i++) 214 checksum -= data[i]; 215 216 do { 217 /* Send data */ 218 tsp2_miconwrite(data, count); 219 220 /* send checksum */ 221 tsp2_miconwrite(&checksum, 1); 222 223 if (tsp2_miconread(recv_buf, sizeof(recv_buf)) <= 3) { 224 printk(KERN_ERR ">%s: receive failed.\n", __func__); 225 226 /* send preamble to clear the receive buffer */ 227 memset(&send_buf, 0xff, sizeof(send_buf)); 228 tsp2_miconwrite(send_buf, sizeof(send_buf)); 229 230 /* make dummy reads */ 231 mdelay(100); 232 tsp2_miconread(recv_buf, sizeof(recv_buf)); 233 } else { 234 /* Generate expected ack */ 235 correct_ack[0] = 0x01; 236 correct_ack[1] = data[1]; 237 correct_ack[2] = 0x00; 238 239 /* checksum Check */ 240 if ((recv_buf[0] + recv_buf[1] + recv_buf[2] + 241 recv_buf[3]) & 0xFF) { 242 printk(KERN_ERR ">%s: Checksum Error : " 243 "Received data[%02x, %02x, %02x, %02x]" 244 "\n", __func__, recv_buf[0], 245 recv_buf[1], recv_buf[2], recv_buf[3]); 246 } else { 247 /* Check Received Data */ 248 if (correct_ack[0] == recv_buf[0] && 249 correct_ack[1] == recv_buf[1] && 250 correct_ack[2] == recv_buf[2]) { 251 /* Interval for next command */ 252 mdelay(10); 253 254 /* Receive ACK */ 255 return 0; 256 } 257 } 258 /* Received NAK or illegal Data */ 259 printk(KERN_ERR ">%s: Error : NAK or Illegal Data " 260 "Received\n", __func__); 261 } 262 } while (retry--); 263 264 /* Interval for next command */ 265 mdelay(10); 266 267 return -1; 268} 269 270static void tsp2_power_off(void) 271{ 272 const unsigned char watchdogkill[] = {0x01, 0x35, 0x00}; 273 const unsigned char shutdownwait[] = {0x00, 0x0c}; 274 const unsigned char poweroff[] = {0x00, 0x06}; 275 /* 38400 baud divisor */ 276 const unsigned divisor = ((orion5x_tclk + (8 * 38400)) / (16 * 38400)); 277 278 pr_info("%s: triggering power-off...\n", __func__); 279 280 /* hijack uart1 and reset into sane state (38400,8n1,even parity) */ 281 writel(0x83, UART1_REG(LCR)); 282 writel(divisor & 0xff, UART1_REG(DLL)); 283 writel((divisor >> 8) & 0xff, UART1_REG(DLM)); 284 writel(0x1b, UART1_REG(LCR)); 285 writel(0x00, UART1_REG(IER)); 286 writel(0x07, UART1_REG(FCR)); 287 writel(0x00, UART1_REG(MCR)); 288 289 /* Send the commands to shutdown the Terastation Pro II */ 290 tsp2_miconsend(watchdogkill, sizeof(watchdogkill)) ; 291 tsp2_miconsend(shutdownwait, sizeof(shutdownwait)) ; 292 tsp2_miconsend(poweroff, sizeof(poweroff)); 293} 294 295/***************************************************************************** 296 * General Setup 297 ****************************************************************************/ 298static struct orion5x_mpp_mode tsp2_mpp_modes[] __initdata = { 299 { 0, MPP_PCIE_RST_OUTn }, 300 { 1, MPP_UNUSED }, 301 { 2, MPP_UNUSED }, 302 { 3, MPP_UNUSED }, 303 { 4, MPP_NAND }, /* BOOT NAND Flash REn */ 304 { 5, MPP_NAND }, /* BOOT NAND Flash WEn */ 305 { 6, MPP_NAND }, /* BOOT NAND Flash HREn[0] */ 306 { 7, MPP_NAND }, /* BOOT NAND Flash WEn[0] */ 307 { 8, MPP_GPIO }, /* MICON int */ 308 { 9, MPP_GPIO }, /* RTC int */ 309 { 10, MPP_UNUSED }, 310 { 11, MPP_GPIO }, /* PCI Int A */ 311 { 12, MPP_UNUSED }, 312 { 13, MPP_GPIO }, /* UPS on UART0 enable */ 313 { 14, MPP_GPIO }, /* UPS low battery detection */ 314 { 15, MPP_UNUSED }, 315 { 16, MPP_UART }, /* UART1 RXD */ 316 { 17, MPP_UART }, /* UART1 TXD */ 317 { 18, MPP_UART }, /* UART1 CTSn */ 318 { 19, MPP_UART }, /* UART1 RTSn */ 319 { -1 }, 320}; 321 322static void __init tsp2_init(void) 323{ 324 /* 325 * Setup basic Orion functions. Need to be called early. 326 */ 327 orion5x_init(); 328 329 orion5x_mpp_conf(tsp2_mpp_modes); 330 331 /* 332 * Configure peripherals. 333 */ 334 orion5x_setup_dev_boot_win(TSP2_NOR_BOOT_BASE, 335 TSP2_NOR_BOOT_SIZE); 336 platform_device_register(&tsp2_nor_flash); 337 338 orion5x_ehci0_init(); 339 orion5x_eth_init(&tsp2_eth_data); 340 orion5x_i2c_init(); 341 orion5x_uart0_init(); 342 orion5x_uart1_init(); 343 344 /* Get RTC IRQ and register the chip */ 345 if (gpio_request(TSP2_RTC_GPIO, "rtc") == 0) { 346 if (gpio_direction_input(TSP2_RTC_GPIO) == 0) 347 tsp2_i2c_rtc.irq = gpio_to_irq(TSP2_RTC_GPIO); 348 else 349 gpio_free(TSP2_RTC_GPIO); 350 } 351 if (tsp2_i2c_rtc.irq == 0) 352 pr_warning("tsp2_init: failed to get RTC IRQ\n"); 353 i2c_register_board_info(0, &tsp2_i2c_rtc, 1); 354 355 /* register Terastation Pro II specific power-off method */ 356 pm_power_off = tsp2_power_off; 357} 358 359MACHINE_START(TERASTATION_PRO2, "Buffalo Terastation Pro II/Live") 360 /* Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com> */ 361 .phys_io = ORION5X_REGS_PHYS_BASE, 362 .io_pg_offst = ((ORION5X_REGS_VIRT_BASE) >> 18) & 0xFFFC, 363 .boot_params = 0x00000100, 364 .init_machine = tsp2_init, 365 .map_io = orion5x_map_io, 366 .init_irq = orion5x_init_irq, 367 .timer = &orion5x_timer, 368 .fixup = tag_fixup_mem32, 369MACHINE_END 370