arch/mips/alchemy/board-mtx1.c

   1 /*
   2  * MTX-1 platform devices registration (Au1500)
   3  *
   4  * Copyright (C) 2007-2009, Florian Fainelli <florian@openwrt.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20
  21 #include <linux/init.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/kernel.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/leds.h>
  26 #include <linux/gpio.h>
  27 #include <linux/gpio_keys.h>
  28 #include <linux/input.h>
  29 #include <linux/mtd/partitions.h>
  30 #include <linux/mtd/physmap.h>
  31 #include <mtd/mtd-abi.h>
  32 #include <asm/bootinfo.h>
  33 #include <asm/reboot.h>
  34 #include <asm/setup.h>
  35 #include <asm/mach-au1x00/au1000.h>
  36 #include <asm/mach-au1x00/gpio-au1000.h>
  37 #include <asm/mach-au1x00/au1xxx_eth.h>
  38 #include <prom.h>
  39
  40 const char *get_system_type(void)
  41 {
  42         return "MTX-1";
  43 }
  44
  45 void __init prom_init(void)
  46 {
  47         unsigned char *memsize_str;
  48         unsigned long memsize;
  49
  50         prom_argc = fw_arg0;
  51         prom_argv = (char **)fw_arg1;
  52         prom_envp = (char **)fw_arg2;
  53
  54         prom_init_cmdline();
  55
  56         memsize_str = prom_getenv("memsize");
  57         if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
  58                 memsize = 0x04000000;
  59         add_memory_region(0, memsize, BOOT_MEM_RAM);
  60 }
  61
  62 void prom_putchar(char c)
  63 {
  64         alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
  65 }
  66
  67 static void mtx1_reset(char *c)
  68 {
  69         /* Jump to the reset vector */
  70         __asm__ __volatile__("jr\t%0" : : "r"(0xbfc00000));
  71 }
  72
  73 static void mtx1_power_off(void)
  74 {
  75         while (1)
  76                 asm volatile (
  77                 "       .set    mips32                                  \n"
  78                 "       wait                                            \n"
  79                 "       .set    mips0                                   \n");
  80 }
  81
  82 void __init board_setup(void)
  83 {
  84 #if IS_ENABLED(CONFIG_USB_OHCI_HCD)
  85         /* Enable USB power switch */
  86         alchemy_gpio_direction_output(204, 0);
  87 #endif /* IS_ENABLED(CONFIG_USB_OHCI_HCD) */
  88
  89         /* Initialize sys_pinfunc */
  90         alchemy_wrsys(SYS_PF_NI2, AU1000_SYS_PINFUNC);
  91
  92         /* Initialize GPIO */
  93         alchemy_wrsys(~0, AU1000_SYS_TRIOUTCLR);
  94         alchemy_gpio_direction_output(0, 0);    /* Disable M66EN (PCI 66MHz) */
  95         alchemy_gpio_direction_output(3, 1);    /* Disable PCI CLKRUN# */
  96         alchemy_gpio_direction_output(1, 1);    /* Enable EXT_IO3 */
  97         alchemy_gpio_direction_output(5, 0);    /* Disable eth PHY TX_ER */
  98
  99         /* Enable LED and set it to green */
 100         alchemy_gpio_direction_output(211, 1);  /* green on */
 101         alchemy_gpio_direction_output(212, 0);  /* red off */
 102
 103         pm_power_off = mtx1_power_off;
 104         _machine_halt = mtx1_power_off;
 105         _machine_restart = mtx1_reset;
 106
 107         printk(KERN_INFO "4G Systems MTX-1 Board\n");
 108 }
 109
 110 /******************************************************************************/
 111
 112 static struct gpio_keys_button mtx1_gpio_button[] = {
 113         {
 114                 .gpio = 207,
 115                 .code = BTN_0,
 116                 .desc = "System button",
 117         }
 118 };
 119
 120 static struct gpio_keys_platform_data mtx1_buttons_data = {
 121         .buttons = mtx1_gpio_button,
 122         .nbuttons = ARRAY_SIZE(mtx1_gpio_button),
 123 };
 124
 125 static struct platform_device mtx1_button = {
 126         .name = "gpio-keys",
 127         .id = -1,
 128         .dev = {
 129                 .platform_data = &mtx1_buttons_data,
 130         }
 131 };
 132
 133 static struct resource mtx1_wdt_res[] = {
 134         [0] = {
 135                 .start  = 215,
 136                 .end    = 215,
 137                 .name   = "mtx1-wdt-gpio",
 138                 .flags  = IORESOURCE_IRQ,
 139         }
 140 };
 141
 142 static struct platform_device mtx1_wdt = {
 143         .name = "mtx1-wdt",
 144         .id = 0,
 145         .num_resources = ARRAY_SIZE(mtx1_wdt_res),
 146         .resource = mtx1_wdt_res,
 147 };
 148
 149 static const struct gpio_led default_leds[] = {
 150         {
 151                 .name   = "mtx1:green",
 152                 .gpio = 211,
 153         }, {
 154                 .name = "mtx1:red",
 155                 .gpio = 212,
 156         },
 157 };
 158
 159 static struct gpio_led_platform_data mtx1_led_data = {
 160         .num_leds = ARRAY_SIZE(default_leds),
 161         .leds = default_leds,
 162 };
 163
 164 static struct platform_device mtx1_gpio_leds = {
 165         .name = "leds-gpio",
 166         .id = -1,
 167         .dev = {
 168                 .platform_data = &mtx1_led_data,
 169         }
 170 };
 171
 172 static struct mtd_partition mtx1_mtd_partitions[] = {
 173         {
 174                 .name   = "filesystem",
 175                 .size   = 0x01C00000,
 176                 .offset = 0,
 177         },
 178         {
 179                 .name   = "yamon",
 180                 .size   = 0x00100000,
 181                 .offset = MTDPART_OFS_APPEND,
 182                 .mask_flags = MTD_WRITEABLE,
 183         },
 184         {
 185                 .name   = "kernel",
 186                 .size   = 0x002c0000,
 187                 .offset = MTDPART_OFS_APPEND,
 188         },
 189         {
 190                 .name   = "yamon env",
 191                 .size   = 0x00040000,
 192                 .offset = MTDPART_OFS_APPEND,
 193         },
 194 };
 195
 196 static struct physmap_flash_data mtx1_flash_data = {
 197         .width          = 4,
 198         .nr_parts       = 4,
 199         .parts          = mtx1_mtd_partitions,
 200 };
 201
 202 static struct resource mtx1_mtd_resource = {
 203         .start  = 0x1e000000,
 204         .end    = 0x1fffffff,
 205         .flags  = IORESOURCE_MEM,
 206 };
 207
 208 static struct platform_device mtx1_mtd = {
 209         .name           = "physmap-flash",
 210         .dev            = {
 211                 .platform_data  = &mtx1_flash_data,
 212         },
 213         .num_resources  = 1,
 214         .resource       = &mtx1_mtd_resource,
 215 };
 216
 217 static struct resource alchemy_pci_host_res[] = {
 218         [0] = {
 219                 .start  = AU1500_PCI_PHYS_ADDR,
 220                 .end    = AU1500_PCI_PHYS_ADDR + 0xfff,
 221                 .flags  = IORESOURCE_MEM,
 222         },
 223 };
 224
 225 static int mtx1_pci_idsel(unsigned int devsel, int assert)
 226 {
 227         /* This function is only necessary to support a proprietary Cardbus
 228          * adapter on the mtx-1 "singleboard" variant. It triggers a custom
 229          * logic chip connected to EXT_IO3 (GPIO1) to suppress IDSEL signals.
 230          */
 231         udelay(1);
 232
 233         if (assert && devsel != 0)
 234                 /* Suppress signal to Cardbus */
 235                 alchemy_gpio_set_value(1, 0);   /* set EXT_IO3 OFF */
 236         else
 237                 alchemy_gpio_set_value(1, 1);   /* set EXT_IO3 ON */
 238
 239         udelay(1);
 240         return 1;
 241 }
 242
 243 static const char mtx1_irqtab[][5] = {
 244         [0] = { -1, AU1500_PCI_INTA, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 00 - AdapterA-Slot0 (top) */
 245         [1] = { -1, AU1500_PCI_INTB, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 01 - AdapterA-Slot1 (bottom) */
 246         [2] = { -1, AU1500_PCI_INTC, AU1500_PCI_INTD, 0xff, 0xff }, /* IDSEL 02 - AdapterB-Slot0 (top) */
 247         [3] = { -1, AU1500_PCI_INTD, AU1500_PCI_INTC, 0xff, 0xff }, /* IDSEL 03 - AdapterB-Slot1 (bottom) */
 248         [4] = { -1, AU1500_PCI_INTA, AU1500_PCI_INTB, 0xff, 0xff }, /* IDSEL 04 - AdapterC-Slot0 (top) */
 249         [5] = { -1, AU1500_PCI_INTB, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 05 - AdapterC-Slot1 (bottom) */
 250         [6] = { -1, AU1500_PCI_INTC, AU1500_PCI_INTD, 0xff, 0xff }, /* IDSEL 06 - AdapterD-Slot0 (top) */
 251         [7] = { -1, AU1500_PCI_INTD, AU1500_PCI_INTC, 0xff, 0xff }, /* IDSEL 07 - AdapterD-Slot1 (bottom) */
 252 };
 253
 254 static int mtx1_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
 255 {
 256         return mtx1_irqtab[slot][pin];
 257 }
 258
 259 static struct alchemy_pci_platdata mtx1_pci_pd = {
 260         .board_map_irq   = mtx1_map_pci_irq,
 261         .board_pci_idsel = mtx1_pci_idsel,
 262         .pci_cfg_set     = PCI_CONFIG_AEN | PCI_CONFIG_R2H | PCI_CONFIG_R1H |
 263                            PCI_CONFIG_CH |
 264 #if defined(__MIPSEB__)
 265                            PCI_CONFIG_SIC_HWA_DAT | PCI_CONFIG_SM,
 266 #else
 267                            0,
 268 #endif
 269 };
 270
 271 static struct platform_device mtx1_pci_host = {
 272         .dev.platform_data = &mtx1_pci_pd,
 273         .name           = "alchemy-pci",
 274         .id             = 0,
 275         .num_resources  = ARRAY_SIZE(alchemy_pci_host_res),
 276         .resource       = alchemy_pci_host_res,
 277 };
 278
 279 static struct platform_device *mtx1_devs[] __initdata = {
 280         &mtx1_pci_host,
 281         &mtx1_gpio_leds,
 282         &mtx1_wdt,
 283         &mtx1_button,
 284         &mtx1_mtd,
 285 };
 286
 287 static struct au1000_eth_platform_data mtx1_au1000_eth0_pdata = {
 288         .phy_search_highest_addr        = 1,
 289         .phy1_search_mac0               = 1,
 290 };
 291
 292 static int __init mtx1_register_devices(void)
 293 {
 294         int rc;
 295
 296         irq_set_irq_type(AU1500_GPIO204_INT, IRQ_TYPE_LEVEL_HIGH);
 297         irq_set_irq_type(AU1500_GPIO201_INT, IRQ_TYPE_LEVEL_LOW);
 298         irq_set_irq_type(AU1500_GPIO202_INT, IRQ_TYPE_LEVEL_LOW);
 299         irq_set_irq_type(AU1500_GPIO203_INT, IRQ_TYPE_LEVEL_LOW);
 300         irq_set_irq_type(AU1500_GPIO205_INT, IRQ_TYPE_LEVEL_LOW);
 301
 302         au1xxx_override_eth_cfg(0, &mtx1_au1000_eth0_pdata);
 303
 304         rc = gpio_request(mtx1_gpio_button[0].gpio,
 305                                         mtx1_gpio_button[0].desc);
 306         if (rc < 0) {
 307                 printk(KERN_INFO "mtx1: failed to request %d\n",
 308                                         mtx1_gpio_button[0].gpio);
 309                 goto out;
 310         }
 311         gpio_direction_input(mtx1_gpio_button[0].gpio);
 312 out:
 313         return platform_add_devices(mtx1_devs, ARRAY_SIZE(mtx1_devs));
 314 }
 315 arch_initcall(mtx1_register_devices);