arch/arm/mach-orion5x/terastation_pro2-setup.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Buffalo Terastation Pro II/Live Board Setup
   4  *
   5  * Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com>
   6  */
   7 #include <linux/gpio.h>
   8 #include <linux/kernel.h>
   9 #include <linux/init.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/pci.h>
  12 #include <linux/irq.h>
  13 #include <linux/delay.h>
  14 #include <linux/mtd/physmap.h>
  15 #include <linux/mv643xx_eth.h>
  16 #include <linux/i2c.h>
  17 #include <linux/serial_reg.h>
  18 #include <asm/mach-types.h>
  19 #include <asm/mach/arch.h>
  20 #include <asm/mach/pci.h>
  21 #include "common.h"
  22 #include "mpp.h"
  23 #include "orion5x.h"
  24
  25 /*****************************************************************************
  26  * Terastation Pro 2/Live Info
  27  ****************************************************************************/
  28
  29 /*
  30  * Terastation Pro 2 hardware :
  31  * - Marvell 88F5281-D0
  32  * - Marvell 88SX6042 SATA controller (PCI)
  33  * - Marvell 88E1118 Gigabit Ethernet PHY
  34  * - 256KB NOR flash
  35  * - 128MB of DDR RAM
  36  * - PCIe port (not equipped)
  37  */
  38
  39 /*
  40  * 256K NOR flash Device bus boot chip select
  41  */
  42
  43 #define TSP2_NOR_BOOT_BASE      0xf4000000
  44 #define TSP2_NOR_BOOT_SIZE      SZ_256K
  45
  46 /*****************************************************************************
  47  * 256KB NOR Flash on BOOT Device
  48  ****************************************************************************/
  49
  50 static struct physmap_flash_data tsp2_nor_flash_data = {
  51         .width    = 1,
  52 };
  53
  54 static struct resource tsp2_nor_flash_resource = {
  55         .flags = IORESOURCE_MEM,
  56         .start = TSP2_NOR_BOOT_BASE,
  57         .end   = TSP2_NOR_BOOT_BASE + TSP2_NOR_BOOT_SIZE - 1,
  58 };
  59
  60 static struct platform_device tsp2_nor_flash = {
  61         .name          = "physmap-flash",
  62         .id            = 0,
  63         .dev           = {
  64                 .platform_data  = &tsp2_nor_flash_data,
  65         },
  66         .num_resources = 1,
  67         .resource      = &tsp2_nor_flash_resource,
  68 };
  69
  70 /*****************************************************************************
  71  * PCI
  72  ****************************************************************************/
  73 #define TSP2_PCI_SLOT0_OFFS             7
  74 #define TSP2_PCI_SLOT0_IRQ_PIN          11
  75
  76 static void __init tsp2_pci_preinit(void)
  77 {
  78         int pin;
  79
  80         /*
  81          * Configure PCI GPIO IRQ pins
  82          */
  83         pin = TSP2_PCI_SLOT0_IRQ_PIN;
  84         if (gpio_request(pin, "PCI Int1") == 0) {
  85                 if (gpio_direction_input(pin) == 0) {
  86                         irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
  87                 } else {
  88                         printk(KERN_ERR "tsp2_pci_preinit failed "
  89                                         "to set_irq_type pin %d\n", pin);
  90                         gpio_free(pin);
  91                 }
  92         } else {
  93                 printk(KERN_ERR "tsp2_pci_preinit failed to "
  94                                 "gpio_request %d\n", pin);
  95         }
  96 }
  97
  98 static int __init tsp2_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  99 {
 100         int irq;
 101
 102         /*
 103          * Check for devices with hard-wired IRQs.
 104          */
 105         irq = orion5x_pci_map_irq(dev, slot, pin);
 106         if (irq != -1)
 107                 return irq;
 108
 109         /*
 110          * PCI IRQs are connected via GPIOs.
 111          */
 112         if (slot == TSP2_PCI_SLOT0_OFFS)
 113                 return gpio_to_irq(TSP2_PCI_SLOT0_IRQ_PIN);
 114
 115         return -1;
 116 }
 117
 118 static struct hw_pci tsp2_pci __initdata = {
 119         .nr_controllers = 2,
 120         .preinit        = tsp2_pci_preinit,
 121         .setup          = orion5x_pci_sys_setup,
 122         .scan           = orion5x_pci_sys_scan_bus,
 123         .map_irq        = tsp2_pci_map_irq,
 124 };
 125
 126 static int __init tsp2_pci_init(void)
 127 {
 128         if (machine_is_terastation_pro2())
 129                 pci_common_init(&tsp2_pci);
 130
 131         return 0;
 132 }
 133
 134 subsys_initcall(tsp2_pci_init);
 135
 136 /*****************************************************************************
 137  * Ethernet
 138  ****************************************************************************/
 139
 140 static struct mv643xx_eth_platform_data tsp2_eth_data = {
 141         .phy_addr       = 0,
 142 };
 143
 144 /*****************************************************************************
 145  * RTC 5C372a on I2C bus
 146  ****************************************************************************/
 147
 148 #define TSP2_RTC_GPIO   9
 149
 150 static struct i2c_board_info __initdata tsp2_i2c_rtc = {
 151         I2C_BOARD_INFO("rs5c372a", 0x32),
 152 };
 153
 154 /*****************************************************************************
 155  * Terastation Pro II specific power off method via UART1-attached
 156  * microcontroller
 157  ****************************************************************************/
 158
 159 #define UART1_REG(x)    (UART1_VIRT_BASE + ((UART_##x) << 2))
 160
 161 static int tsp2_miconread(unsigned char *buf, int count)
 162 {
 163         int i;
 164         int timeout;
 165
 166         for (i = 0; i < count; i++) {
 167                 timeout = 10;
 168
 169                 while (!(readl(UART1_REG(LSR)) & UART_LSR_DR)) {
 170                         if (--timeout == 0)
 171                                 break;
 172                         udelay(1000);
 173                 }
 174
 175                 if (timeout == 0)
 176                         break;
 177                 buf[i] = readl(UART1_REG(RX));
 178         }
 179
 180         /* return read bytes */
 181         return i;
 182 }
 183
 184 static int tsp2_miconwrite(const unsigned char *buf, int count)
 185 {
 186         int i = 0;
 187
 188         while (count--) {
 189                 while (!(readl(UART1_REG(LSR)) & UART_LSR_THRE))
 190                         barrier();
 191                 writel(buf[i++], UART1_REG(TX));
 192         }
 193
 194         return 0;
 195 }
 196
 197 static int tsp2_miconsend(const unsigned char *data, int count)
 198 {
 199         int i;
 200         unsigned char checksum = 0;
 201         unsigned char recv_buf[40];
 202         unsigned char send_buf[40];
 203         unsigned char correct_ack[3];
 204         int retry = 2;
 205
 206         /* Generate checksum */
 207         for (i = 0; i < count; i++)
 208                 checksum -=  data[i];
 209
 210         do {
 211                 /* Send data */
 212                 tsp2_miconwrite(data, count);
 213
 214                 /* send checksum */
 215                 tsp2_miconwrite(&checksum, 1);
 216
 217                 if (tsp2_miconread(recv_buf, sizeof(recv_buf)) <= 3) {
 218                         printk(KERN_ERR ">%s: receive failed.\n", __func__);
 219
 220                         /* send preamble to clear the receive buffer */
 221                         memset(&send_buf, 0xff, sizeof(send_buf));
 222                         tsp2_miconwrite(send_buf, sizeof(send_buf));
 223
 224                         /* make dummy reads */
 225                         mdelay(100);
 226                         tsp2_miconread(recv_buf, sizeof(recv_buf));
 227                 } else {
 228                         /* Generate expected ack */
 229                         correct_ack[0] = 0x01;
 230                         correct_ack[1] = data[1];
 231                         correct_ack[2] = 0x00;
 232
 233                         /* checksum Check */
 234                         if ((recv_buf[0] + recv_buf[1] + recv_buf[2] +
 235                              recv_buf[3]) & 0xFF) {
 236                                 printk(KERN_ERR ">%s: Checksum Error : "
 237                                         "Received data[%02x, %02x, %02x, %02x]"
 238                                         "\n", __func__, recv_buf[0],
 239                                         recv_buf[1], recv_buf[2], recv_buf[3]);
 240                         } else {
 241                                 /* Check Received Data */
 242                                 if (correct_ack[0] == recv_buf[0] &&
 243                                     correct_ack[1] == recv_buf[1] &&
 244                                     correct_ack[2] == recv_buf[2]) {
 245                                         /* Interval for next command */
 246                                         mdelay(10);
 247
 248                                         /* Receive ACK */
 249                                         return 0;
 250                                 }
 251                         }
 252                         /* Received NAK or illegal Data */
 253                         printk(KERN_ERR ">%s: Error : NAK or Illegal Data "
 254                                         "Received\n", __func__);
 255                 }
 256         } while (retry--);
 257
 258         /* Interval for next command */
 259         mdelay(10);
 260
 261         return -1;
 262 }
 263
 264 static void tsp2_power_off(void)
 265 {
 266         const unsigned char watchdogkill[]      = {0x01, 0x35, 0x00};
 267         const unsigned char shutdownwait[]      = {0x00, 0x0c};
 268         const unsigned char poweroff[]          = {0x00, 0x06};
 269         /* 38400 baud divisor */
 270         const unsigned divisor = ((orion5x_tclk + (8 * 38400)) / (16 * 38400));
 271
 272         pr_info("%s: triggering power-off...\n", __func__);
 273
 274         /* hijack uart1 and reset into sane state (38400,8n1,even parity) */
 275         writel(0x83, UART1_REG(LCR));
 276         writel(divisor & 0xff, UART1_REG(DLL));
 277         writel((divisor >> 8) & 0xff, UART1_REG(DLM));
 278         writel(0x1b, UART1_REG(LCR));
 279         writel(0x00, UART1_REG(IER));
 280         writel(0x07, UART1_REG(FCR));
 281         writel(0x00, UART1_REG(MCR));
 282
 283         /* Send the commands to shutdown the Terastation Pro II */
 284         tsp2_miconsend(watchdogkill, sizeof(watchdogkill)) ;
 285         tsp2_miconsend(shutdownwait, sizeof(shutdownwait)) ;
 286         tsp2_miconsend(poweroff, sizeof(poweroff));
 287 }
 288
 289 /*****************************************************************************
 290  * General Setup
 291  ****************************************************************************/
 292 static unsigned int tsp2_mpp_modes[] __initdata = {
 293         MPP0_PCIE_RST_OUTn,
 294         MPP1_UNUSED,
 295         MPP2_UNUSED,
 296         MPP3_UNUSED,
 297         MPP4_NAND,              /* BOOT NAND Flash REn */
 298         MPP5_NAND,              /* BOOT NAND Flash WEn */
 299         MPP6_NAND,              /* BOOT NAND Flash HREn[0] */
 300         MPP7_NAND,              /* BOOT NAND Flash WEn[0] */
 301         MPP8_GPIO,              /* MICON int */
 302         MPP9_GPIO,              /* RTC int */
 303         MPP10_UNUSED,
 304         MPP11_GPIO,             /* PCI Int A */
 305         MPP12_UNUSED,
 306         MPP13_GPIO,             /* UPS on UART0 enable */
 307         MPP14_GPIO,             /* UPS low battery detection */
 308         MPP15_UNUSED,
 309         MPP16_UART,             /* UART1 RXD */
 310         MPP17_UART,             /* UART1 TXD */
 311         MPP18_UART,             /* UART1 CTSn */
 312         MPP19_UART,             /* UART1 RTSn */
 313         0,
 314 };
 315
 316 static void __init tsp2_init(void)
 317 {
 318         /*
 319          * Setup basic Orion functions. Need to be called early.
 320          */
 321         orion5x_init();
 322
 323         orion5x_mpp_conf(tsp2_mpp_modes);
 324
 325         /*
 326          * Configure peripherals.
 327          */
 328         mvebu_mbus_add_window_by_id(ORION_MBUS_DEVBUS_BOOT_TARGET,
 329                                     ORION_MBUS_DEVBUS_BOOT_ATTR,
 330                                     TSP2_NOR_BOOT_BASE,
 331                                     TSP2_NOR_BOOT_SIZE);
 332         platform_device_register(&tsp2_nor_flash);
 333
 334         orion5x_ehci0_init();
 335         orion5x_eth_init(&tsp2_eth_data);
 336         orion5x_i2c_init();
 337         orion5x_uart0_init();
 338         orion5x_uart1_init();
 339
 340         /* Get RTC IRQ and register the chip */
 341         if (gpio_request(TSP2_RTC_GPIO, "rtc") == 0) {
 342                 if (gpio_direction_input(TSP2_RTC_GPIO) == 0)
 343                         tsp2_i2c_rtc.irq = gpio_to_irq(TSP2_RTC_GPIO);
 344                 else
 345                         gpio_free(TSP2_RTC_GPIO);
 346         }
 347         if (tsp2_i2c_rtc.irq == 0)
 348                 pr_warn("tsp2_init: failed to get RTC IRQ\n");
 349         i2c_register_board_info(0, &tsp2_i2c_rtc, 1);
 350
 351         /* register Terastation Pro II specific power-off method */
 352         pm_power_off = tsp2_power_off;
 353 }
 354
 355 MACHINE_START(TERASTATION_PRO2, "Buffalo Terastation Pro II/Live")
 356         /* Maintainer:  Sylver Bruneau <sylver.bruneau@googlemail.com> */
 357         .atag_offset    = 0x100,
 358         .nr_irqs        = ORION5X_NR_IRQS,
 359         .init_machine   = tsp2_init,
 360         .map_io         = orion5x_map_io,
 361         .init_early     = orion5x_init_early,
 362         .init_irq       = orion5x_init_irq,
 363         .init_time      = orion5x_timer_init,
 364         .fixup          = tag_fixup_mem32,
 365         .restart        = orion5x_restart,
 366 MACHINE_END