arch/arm/mach-vexpress/v2m.c

   1 /*
   2  * Versatile Express V2M Motherboard Support
   3  */
   4 #include <linux/device.h>
   5 #include <linux/amba/bus.h>
   6 #include <linux/amba/mmci.h>
   7 #include <linux/io.h>
   8 #include <linux/smp.h>
   9 #include <linux/init.h>
  10 #include <linux/irqchip.h>
  11 #include <linux/of_address.h>
  12 #include <linux/of_fdt.h>
  13 #include <linux/of_irq.h>
  14 #include <linux/of_platform.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/ata_platform.h>
  17 #include <linux/smsc911x.h>
  18 #include <linux/spinlock.h>
  19 #include <linux/usb/isp1760.h>
  20 #include <linux/mtd/physmap.h>
  21 #include <linux/regulator/fixed.h>
  22 #include <linux/regulator/machine.h>
  23 #include <linux/vexpress.h>
  24
  25 #include <asm/arch_timer.h>
  26 #include <asm/mach-types.h>
  27 #include <asm/sizes.h>
  28 #include <asm/smp_twd.h>
  29 #include <asm/mach/arch.h>
  30 #include <asm/mach/map.h>
  31 #include <asm/mach/time.h>
  32 #include <asm/hardware/arm_timer.h>
  33 #include <asm/hardware/cache-l2x0.h>
  34 #include <asm/hardware/timer-sp.h>
  35
  36 #include <mach/ct-ca9x4.h>
  37 #include <mach/motherboard.h>
  38
  39 #include <plat/sched_clock.h>
  40 #include <plat/platsmp.h>
  41
  42 #include "core.h"
  43
  44 #define V2M_PA_CS0      0x40000000
  45 #define V2M_PA_CS1      0x44000000
  46 #define V2M_PA_CS2      0x48000000
  47 #define V2M_PA_CS3      0x4c000000
  48 #define V2M_PA_CS7      0x10000000
  49
  50 static struct map_desc v2m_io_desc[] __initdata = {
  51         {
  52                 .virtual        = V2M_PERIPH,
  53                 .pfn            = __phys_to_pfn(V2M_PA_CS7),
  54                 .length         = SZ_128K,
  55                 .type           = MT_DEVICE,
  56         },
  57 };
  58
  59 static void __init v2m_sp804_init(void __iomem *base, unsigned int irq)
  60 {
  61         if (WARN_ON(!base || irq == NO_IRQ))
  62                 return;
  63
  64         writel(0, base + TIMER_1_BASE + TIMER_CTRL);
  65         writel(0, base + TIMER_2_BASE + TIMER_CTRL);
  66
  67         sp804_clocksource_init(base + TIMER_2_BASE, "v2m-timer1");
  68         sp804_clockevents_init(base + TIMER_1_BASE, irq, "v2m-timer0");
  69 }
  70
  71
  72 static struct resource v2m_pcie_i2c_resource = {
  73         .start  = V2M_SERIAL_BUS_PCI,
  74         .end    = V2M_SERIAL_BUS_PCI + SZ_4K - 1,
  75         .flags  = IORESOURCE_MEM,
  76 };
  77
  78 static struct platform_device v2m_pcie_i2c_device = {
  79         .name           = "versatile-i2c",
  80         .id             = 0,
  81         .num_resources  = 1,
  82         .resource       = &v2m_pcie_i2c_resource,
  83 };
  84
  85 static struct resource v2m_ddc_i2c_resource = {
  86         .start  = V2M_SERIAL_BUS_DVI,
  87         .end    = V2M_SERIAL_BUS_DVI + SZ_4K - 1,
  88         .flags  = IORESOURCE_MEM,
  89 };
  90
  91 static struct platform_device v2m_ddc_i2c_device = {
  92         .name           = "versatile-i2c",
  93         .id             = 1,
  94         .num_resources  = 1,
  95         .resource       = &v2m_ddc_i2c_resource,
  96 };
  97
  98 static struct resource v2m_eth_resources[] = {
  99         {
 100                 .start  = V2M_LAN9118,
 101                 .end    = V2M_LAN9118 + SZ_64K - 1,
 102                 .flags  = IORESOURCE_MEM,
 103         }, {
 104                 .start  = IRQ_V2M_LAN9118,
 105                 .end    = IRQ_V2M_LAN9118,
 106                 .flags  = IORESOURCE_IRQ,
 107         },
 108 };
 109
 110 static struct smsc911x_platform_config v2m_eth_config = {
 111         .flags          = SMSC911X_USE_32BIT,
 112         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH,
 113         .irq_type       = SMSC911X_IRQ_TYPE_PUSH_PULL,
 114         .phy_interface  = PHY_INTERFACE_MODE_MII,
 115 };
 116
 117 static struct platform_device v2m_eth_device = {
 118         .name           = "smsc911x",
 119         .id             = -1,
 120         .resource       = v2m_eth_resources,
 121         .num_resources  = ARRAY_SIZE(v2m_eth_resources),
 122         .dev.platform_data = &v2m_eth_config,
 123 };
 124
 125 static struct regulator_consumer_supply v2m_eth_supplies[] = {
 126         REGULATOR_SUPPLY("vddvario", "smsc911x"),
 127         REGULATOR_SUPPLY("vdd33a", "smsc911x"),
 128 };
 129
 130 static struct resource v2m_usb_resources[] = {
 131         {
 132                 .start  = V2M_ISP1761,
 133                 .end    = V2M_ISP1761 + SZ_128K - 1,
 134                 .flags  = IORESOURCE_MEM,
 135         }, {
 136                 .start  = IRQ_V2M_ISP1761,
 137                 .end    = IRQ_V2M_ISP1761,
 138                 .flags  = IORESOURCE_IRQ,
 139         },
 140 };
 141
 142 static struct isp1760_platform_data v2m_usb_config = {
 143         .is_isp1761             = true,
 144         .bus_width_16           = false,
 145         .port1_otg              = true,
 146         .analog_oc              = false,
 147         .dack_polarity_high     = false,
 148         .dreq_polarity_high     = false,
 149 };
 150
 151 static struct platform_device v2m_usb_device = {
 152         .name           = "isp1760",
 153         .id             = -1,
 154         .resource       = v2m_usb_resources,
 155         .num_resources  = ARRAY_SIZE(v2m_usb_resources),
 156         .dev.platform_data = &v2m_usb_config,
 157 };
 158
 159 static struct physmap_flash_data v2m_flash_data = {
 160         .width          = 4,
 161 };
 162
 163 static struct resource v2m_flash_resources[] = {
 164         {
 165                 .start  = V2M_NOR0,
 166                 .end    = V2M_NOR0 + SZ_64M - 1,
 167                 .flags  = IORESOURCE_MEM,
 168         }, {
 169                 .start  = V2M_NOR1,
 170                 .end    = V2M_NOR1 + SZ_64M - 1,
 171                 .flags  = IORESOURCE_MEM,
 172         },
 173 };
 174
 175 static struct platform_device v2m_flash_device = {
 176         .name           = "physmap-flash",
 177         .id             = -1,
 178         .resource       = v2m_flash_resources,
 179         .num_resources  = ARRAY_SIZE(v2m_flash_resources),
 180         .dev.platform_data = &v2m_flash_data,
 181 };
 182
 183 static struct pata_platform_info v2m_pata_data = {
 184         .ioport_shift   = 2,
 185 };
 186
 187 static struct resource v2m_pata_resources[] = {
 188         {
 189                 .start  = V2M_CF,
 190                 .end    = V2M_CF + 0xff,
 191                 .flags  = IORESOURCE_MEM,
 192         }, {
 193                 .start  = V2M_CF + 0x100,
 194                 .end    = V2M_CF + SZ_4K - 1,
 195                 .flags  = IORESOURCE_MEM,
 196         },
 197 };
 198
 199 static struct platform_device v2m_cf_device = {
 200         .name           = "pata_platform",
 201         .id             = -1,
 202         .resource       = v2m_pata_resources,
 203         .num_resources  = ARRAY_SIZE(v2m_pata_resources),
 204         .dev.platform_data = &v2m_pata_data,
 205 };
 206
 207 static struct mmci_platform_data v2m_mmci_data = {
 208         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 209         .gpio_wp        = VEXPRESS_GPIO_MMC_WPROT,
 210         .gpio_cd        = VEXPRESS_GPIO_MMC_CARDIN,
 211 };
 212
 213 static struct resource v2m_sysreg_resources[] = {
 214         {
 215                 .start  = V2M_SYSREGS,
 216                 .end    = V2M_SYSREGS + 0xfff,
 217                 .flags  = IORESOURCE_MEM,
 218         },
 219 };
 220
 221 static struct platform_device v2m_sysreg_device = {
 222         .name           = "vexpress-sysreg",
 223         .id             = -1,
 224         .resource       = v2m_sysreg_resources,
 225         .num_resources  = ARRAY_SIZE(v2m_sysreg_resources),
 226 };
 227
 228 static struct platform_device v2m_muxfpga_device = {
 229         .name           = "vexpress-muxfpga",
 230         .id             = 0,
 231         .num_resources  = 1,
 232         .resource       = (struct resource []) {
 233                 VEXPRESS_RES_FUNC(0, 7),
 234         }
 235 };
 236
 237 static struct platform_device v2m_shutdown_device = {
 238         .name           = "vexpress-shutdown",
 239         .id             = 0,
 240         .num_resources  = 1,
 241         .resource       = (struct resource []) {
 242                 VEXPRESS_RES_FUNC(0, 8),
 243         }
 244 };
 245
 246 static struct platform_device v2m_reboot_device = {
 247         .name           = "vexpress-reboot",
 248         .id             = 0,
 249         .num_resources  = 1,
 250         .resource       = (struct resource []) {
 251                 VEXPRESS_RES_FUNC(0, 9),
 252         }
 253 };
 254
 255 static struct platform_device v2m_dvimode_device = {
 256         .name           = "vexpress-dvimode",
 257         .id             = 0,
 258         .num_resources  = 1,
 259         .resource       = (struct resource []) {
 260                 VEXPRESS_RES_FUNC(0, 11),
 261         }
 262 };
 263
 264 static AMBA_APB_DEVICE(aaci,  "mb:aaci",  0, V2M_AACI, IRQ_V2M_AACI, NULL);
 265 static AMBA_APB_DEVICE(mmci,  "mb:mmci",  0, V2M_MMCI, IRQ_V2M_MMCI, &v2m_mmci_data);
 266 static AMBA_APB_DEVICE(kmi0,  "mb:kmi0",  0, V2M_KMI0, IRQ_V2M_KMI0, NULL);
 267 static AMBA_APB_DEVICE(kmi1,  "mb:kmi1",  0, V2M_KMI1, IRQ_V2M_KMI1, NULL);
 268 static AMBA_APB_DEVICE(uart0, "mb:uart0", 0, V2M_UART0, IRQ_V2M_UART0, NULL);
 269 static AMBA_APB_DEVICE(uart1, "mb:uart1", 0, V2M_UART1, IRQ_V2M_UART1, NULL);
 270 static AMBA_APB_DEVICE(uart2, "mb:uart2", 0, V2M_UART2, IRQ_V2M_UART2, NULL);
 271 static AMBA_APB_DEVICE(uart3, "mb:uart3", 0, V2M_UART3, IRQ_V2M_UART3, NULL);
 272 static AMBA_APB_DEVICE(wdt,   "mb:wdt",   0, V2M_WDT, IRQ_V2M_WDT, NULL);
 273 static AMBA_APB_DEVICE(rtc,   "mb:rtc",   0, V2M_RTC, IRQ_V2M_RTC, NULL);
 274
 275 static struct amba_device *v2m_amba_devs[] __initdata = {
 276         &aaci_device,
 277         &mmci_device,
 278         &kmi0_device,
 279         &kmi1_device,
 280         &uart0_device,
 281         &uart1_device,
 282         &uart2_device,
 283         &uart3_device,
 284         &wdt_device,
 285         &rtc_device,
 286 };
 287
 288 static void __init v2m_timer_init(void)
 289 {
 290         vexpress_clk_init(ioremap(V2M_SYSCTL, SZ_4K));
 291         v2m_sp804_init(ioremap(V2M_TIMER01, SZ_4K), IRQ_V2M_TIMER0);
 292 }
 293
 294 static void __init v2m_init_early(void)
 295 {
 296         if (ct_desc->init_early)
 297                 ct_desc->init_early();
 298         versatile_sched_clock_init(vexpress_get_24mhz_clock_base(), 24000000);
 299 }
 300
 301 struct ct_desc *ct_desc;
 302
 303 static struct ct_desc *ct_descs[] __initdata = {
 304 #ifdef CONFIG_ARCH_VEXPRESS_CA9X4
 305         &ct_ca9x4_desc,
 306 #endif
 307 };
 308
 309 static void __init v2m_populate_ct_desc(void)
 310 {
 311         int i;
 312         u32 current_tile_id;
 313
 314         ct_desc = NULL;
 315         current_tile_id = vexpress_get_procid(VEXPRESS_SITE_MASTER)
 316                                 & V2M_CT_ID_MASK;
 317
 318         for (i = 0; i < ARRAY_SIZE(ct_descs) && !ct_desc; ++i)
 319                 if (ct_descs[i]->id == current_tile_id)
 320                         ct_desc = ct_descs[i];
 321
 322         if (!ct_desc)
 323                 panic("vexpress: this kernel does not support core tile ID 0x%08x when booting via ATAGs.\n"
 324                       "You may need a device tree blob or a different kernel to boot on this board.\n",
 325                       current_tile_id);
 326 }
 327
 328 static void __init v2m_map_io(void)
 329 {
 330         iotable_init(v2m_io_desc, ARRAY_SIZE(v2m_io_desc));
 331         vexpress_sysreg_early_init(ioremap(V2M_SYSREGS, SZ_4K));
 332         v2m_populate_ct_desc();
 333         ct_desc->map_io();
 334 }
 335
 336 static void __init v2m_init_irq(void)
 337 {
 338         ct_desc->init_irq();
 339 }
 340
 341 static void __init v2m_init(void)
 342 {
 343         int i;
 344
 345         regulator_register_fixed(0, v2m_eth_supplies,
 346                         ARRAY_SIZE(v2m_eth_supplies));
 347
 348         platform_device_register(&v2m_muxfpga_device);
 349         platform_device_register(&v2m_shutdown_device);
 350         platform_device_register(&v2m_reboot_device);
 351         platform_device_register(&v2m_dvimode_device);
 352
 353         platform_device_register(&v2m_sysreg_device);
 354         platform_device_register(&v2m_pcie_i2c_device);
 355         platform_device_register(&v2m_ddc_i2c_device);
 356         platform_device_register(&v2m_flash_device);
 357         platform_device_register(&v2m_cf_device);
 358         platform_device_register(&v2m_eth_device);
 359         platform_device_register(&v2m_usb_device);
 360
 361         for (i = 0; i < ARRAY_SIZE(v2m_amba_devs); i++)
 362                 amba_device_register(v2m_amba_devs[i], &iomem_resource);
 363
 364         pm_power_off = vexpress_power_off;
 365
 366         ct_desc->init_tile();
 367 }
 368
 369 MACHINE_START(VEXPRESS, "ARM-Versatile Express")
 370         .atag_offset    = 0x100,
 371         .smp            = smp_ops(vexpress_smp_ops),
 372         .map_io         = v2m_map_io,
 373         .init_early     = v2m_init_early,
 374         .init_irq       = v2m_init_irq,
 375         .init_time      = v2m_timer_init,
 376         .init_machine   = v2m_init,
 377         .restart        = vexpress_restart,
 378 MACHINE_END
 379
 380 static struct map_desc v2m_rs1_io_desc __initdata = {
 381         .virtual        = V2M_PERIPH,
 382         .pfn            = __phys_to_pfn(0x1c000000),
 383         .length         = SZ_2M,
 384         .type           = MT_DEVICE,
 385 };
 386
 387 static int __init v2m_dt_scan_memory_map(unsigned long node, const char *uname,
 388                 int depth, void *data)
 389 {
 390         const char **map = data;
 391
 392         if (strcmp(uname, "motherboard") != 0)
 393                 return 0;
 394
 395         *map = of_get_flat_dt_prop(node, "arm,v2m-memory-map", NULL);
 396
 397         return 1;
 398 }
 399
 400 void __init v2m_dt_map_io(void)
 401 {
 402         const char *map = NULL;
 403
 404         of_scan_flat_dt(v2m_dt_scan_memory_map, &map);
 405
 406         if (map && strcmp(map, "rs1") == 0)
 407                 iotable_init(&v2m_rs1_io_desc, 1);
 408         else
 409                 iotable_init(v2m_io_desc, ARRAY_SIZE(v2m_io_desc));
 410
 411 #if defined(CONFIG_SMP)
 412         vexpress_dt_smp_map_io();
 413 #endif
 414 }
 415
 416 void __init v2m_dt_init_early(void)
 417 {
 418         u32 dt_hbi;
 419
 420         vexpress_sysreg_of_early_init();
 421
 422         /* Confirm board type against DT property, if available */
 423         if (of_property_read_u32(of_allnodes, "arm,hbi", &dt_hbi) == 0) {
 424                 u32 hbi = vexpress_get_hbi(VEXPRESS_SITE_MASTER);
 425
 426                 if (WARN_ON(dt_hbi != hbi))
 427                         pr_warning("vexpress: DT HBI (%x) is not matching "
 428                                         "hardware (%x)!\n", dt_hbi, hbi);
 429         }
 430 }
 431
 432 static void __init v2m_dt_timer_init(void)
 433 {
 434         struct device_node *node = NULL;
 435
 436         vexpress_clk_of_init();
 437
 438         do {
 439                 node = of_find_compatible_node(node, NULL, "arm,sp804");
 440         } while (node && vexpress_get_site_by_node(node) != VEXPRESS_SITE_MB);
 441         if (node) {
 442                 pr_info("Using SP804 '%s' as a clock & events source\n",
 443                                 node->full_name);
 444                 v2m_sp804_init(of_iomap(node, 0),
 445                                 irq_of_parse_and_map(node, 0));
 446         }
 447
 448         if (arch_timer_of_register() != 0)
 449                 twd_local_timer_of_register();
 450
 451         if (arch_timer_sched_clock_init() != 0)
 452                 versatile_sched_clock_init(vexpress_get_24mhz_clock_base(),
 453                                 24000000);
 454 }
 455
 456 static const struct of_device_id v2m_dt_bus_match[] __initconst = {
 457         { .compatible = "simple-bus", },
 458         { .compatible = "arm,amba-bus", },
 459         { .compatible = "arm,vexpress,config-bus", },
 460         {}
 461 };
 462
 463 static void __init v2m_dt_init(void)
 464 {
 465         l2x0_of_init(0x00400000, 0xfe0fffff);
 466         of_platform_populate(NULL, v2m_dt_bus_match, NULL, NULL);
 467         pm_power_off = vexpress_power_off;
 468 }
 469
 470 static const char * const v2m_dt_match[] __initconst = {
 471         "arm,vexpress",
 472         "xen,xenvm",
 473         NULL,
 474 };
 475
 476 DT_MACHINE_START(VEXPRESS_DT, "ARM-Versatile Express")
 477         .dt_compat      = v2m_dt_match,
 478         .smp            = smp_ops(vexpress_smp_ops),
 479         .map_io         = v2m_dt_map_io,
 480         .init_early     = v2m_dt_init_early,
 481         .init_irq       = irqchip_init,
 482         .init_time      = v2m_dt_timer_init,
 483         .init_machine   = v2m_dt_init,
 484         .restart        = vexpress_restart,
 485 MACHINE_END