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 #include <linux/clk-provider.h>
  25 #include <linux/clkdev.h>
  26
  27 #include <asm/arch_timer.h>
  28 #include <asm/mach-types.h>
  29 #include <asm/sizes.h>
  30 #include <asm/smp_twd.h>
  31 #include <asm/mach/arch.h>
  32 #include <asm/mach/map.h>
  33 #include <asm/mach/time.h>
  34 #include <asm/hardware/arm_timer.h>
  35 #include <asm/hardware/cache-l2x0.h>
  36 #include <asm/hardware/timer-sp.h>
  37
  38 #include <mach/ct-ca9x4.h>
  39 #include <mach/motherboard.h>
  40
  41 #include <plat/sched_clock.h>
  42 #include <plat/platsmp.h>
  43
  44 #include "core.h"
  45
  46 #define V2M_PA_CS0      0x40000000
  47 #define V2M_PA_CS1      0x44000000
  48 #define V2M_PA_CS2      0x48000000
  49 #define V2M_PA_CS3      0x4c000000
  50 #define V2M_PA_CS7      0x10000000
  51
  52 static struct map_desc v2m_io_desc[] __initdata = {
  53         {
  54                 .virtual        = V2M_PERIPH,
  55                 .pfn            = __phys_to_pfn(V2M_PA_CS7),
  56                 .length         = SZ_128K,
  57                 .type           = MT_DEVICE,
  58         },
  59 };
  60
  61 static void __init v2m_sp804_init(void __iomem *base, unsigned int irq)
  62 {
  63         if (WARN_ON(!base || irq == NO_IRQ))
  64                 return;
  65
  66         writel(0, base + TIMER_1_BASE + TIMER_CTRL);
  67         writel(0, base + TIMER_2_BASE + TIMER_CTRL);
  68
  69         sp804_clocksource_init(base + TIMER_2_BASE, "v2m-timer1");
  70         sp804_clockevents_init(base + TIMER_1_BASE, irq, "v2m-timer0");
  71 }
  72
  73
  74 static struct resource v2m_pcie_i2c_resource = {
  75         .start  = V2M_SERIAL_BUS_PCI,
  76         .end    = V2M_SERIAL_BUS_PCI + SZ_4K - 1,
  77         .flags  = IORESOURCE_MEM,
  78 };
  79
  80 static struct platform_device v2m_pcie_i2c_device = {
  81         .name           = "versatile-i2c",
  82         .id             = 0,
  83         .num_resources  = 1,
  84         .resource       = &v2m_pcie_i2c_resource,
  85 };
  86
  87 static struct resource v2m_ddc_i2c_resource = {
  88         .start  = V2M_SERIAL_BUS_DVI,
  89         .end    = V2M_SERIAL_BUS_DVI + SZ_4K - 1,
  90         .flags  = IORESOURCE_MEM,
  91 };
  92
  93 static struct platform_device v2m_ddc_i2c_device = {
  94         .name           = "versatile-i2c",
  95         .id             = 1,
  96         .num_resources  = 1,
  97         .resource       = &v2m_ddc_i2c_resource,
  98 };
  99
 100 static struct resource v2m_eth_resources[] = {
 101         {
 102                 .start  = V2M_LAN9118,
 103                 .end    = V2M_LAN9118 + SZ_64K - 1,
 104                 .flags  = IORESOURCE_MEM,
 105         }, {
 106                 .start  = IRQ_V2M_LAN9118,
 107                 .end    = IRQ_V2M_LAN9118,
 108                 .flags  = IORESOURCE_IRQ,
 109         },
 110 };
 111
 112 static struct smsc911x_platform_config v2m_eth_config = {
 113         .flags          = SMSC911X_USE_32BIT,
 114         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH,
 115         .irq_type       = SMSC911X_IRQ_TYPE_PUSH_PULL,
 116         .phy_interface  = PHY_INTERFACE_MODE_MII,
 117 };
 118
 119 static struct platform_device v2m_eth_device = {
 120         .name           = "smsc911x",
 121         .id             = -1,
 122         .resource       = v2m_eth_resources,
 123         .num_resources  = ARRAY_SIZE(v2m_eth_resources),
 124         .dev.platform_data = &v2m_eth_config,
 125 };
 126
 127 static struct regulator_consumer_supply v2m_eth_supplies[] = {
 128         REGULATOR_SUPPLY("vddvario", "smsc911x"),
 129         REGULATOR_SUPPLY("vdd33a", "smsc911x"),
 130 };
 131
 132 static struct resource v2m_usb_resources[] = {
 133         {
 134                 .start  = V2M_ISP1761,
 135                 .end    = V2M_ISP1761 + SZ_128K - 1,
 136                 .flags  = IORESOURCE_MEM,
 137         }, {
 138                 .start  = IRQ_V2M_ISP1761,
 139                 .end    = IRQ_V2M_ISP1761,
 140                 .flags  = IORESOURCE_IRQ,
 141         },
 142 };
 143
 144 static struct isp1760_platform_data v2m_usb_config = {
 145         .is_isp1761             = true,
 146         .bus_width_16           = false,
 147         .port1_otg              = true,
 148         .analog_oc              = false,
 149         .dack_polarity_high     = false,
 150         .dreq_polarity_high     = false,
 151 };
 152
 153 static struct platform_device v2m_usb_device = {
 154         .name           = "isp1760",
 155         .id             = -1,
 156         .resource       = v2m_usb_resources,
 157         .num_resources  = ARRAY_SIZE(v2m_usb_resources),
 158         .dev.platform_data = &v2m_usb_config,
 159 };
 160
 161 static struct physmap_flash_data v2m_flash_data = {
 162         .width          = 4,
 163 };
 164
 165 static struct resource v2m_flash_resources[] = {
 166         {
 167                 .start  = V2M_NOR0,
 168                 .end    = V2M_NOR0 + SZ_64M - 1,
 169                 .flags  = IORESOURCE_MEM,
 170         }, {
 171                 .start  = V2M_NOR1,
 172                 .end    = V2M_NOR1 + SZ_64M - 1,
 173                 .flags  = IORESOURCE_MEM,
 174         },
 175 };
 176
 177 static struct platform_device v2m_flash_device = {
 178         .name           = "physmap-flash",
 179         .id             = -1,
 180         .resource       = v2m_flash_resources,
 181         .num_resources  = ARRAY_SIZE(v2m_flash_resources),
 182         .dev.platform_data = &v2m_flash_data,
 183 };
 184
 185 static struct pata_platform_info v2m_pata_data = {
 186         .ioport_shift   = 2,
 187 };
 188
 189 static struct resource v2m_pata_resources[] = {
 190         {
 191                 .start  = V2M_CF,
 192                 .end    = V2M_CF + 0xff,
 193                 .flags  = IORESOURCE_MEM,
 194         }, {
 195                 .start  = V2M_CF + 0x100,
 196                 .end    = V2M_CF + SZ_4K - 1,
 197                 .flags  = IORESOURCE_MEM,
 198         },
 199 };
 200
 201 static struct platform_device v2m_cf_device = {
 202         .name           = "pata_platform",
 203         .id             = -1,
 204         .resource       = v2m_pata_resources,
 205         .num_resources  = ARRAY_SIZE(v2m_pata_resources),
 206         .dev.platform_data = &v2m_pata_data,
 207 };
 208
 209 static struct mmci_platform_data v2m_mmci_data = {
 210         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 211         .gpio_wp        = VEXPRESS_GPIO_MMC_WPROT,
 212         .gpio_cd        = VEXPRESS_GPIO_MMC_CARDIN,
 213 };
 214
 215 static struct resource v2m_sysreg_resources[] = {
 216         {
 217                 .start  = V2M_SYSREGS,
 218                 .end    = V2M_SYSREGS + 0xfff,
 219                 .flags  = IORESOURCE_MEM,
 220         },
 221 };
 222
 223 static struct platform_device v2m_sysreg_device = {
 224         .name           = "vexpress-sysreg",
 225         .id             = -1,
 226         .resource       = v2m_sysreg_resources,
 227         .num_resources  = ARRAY_SIZE(v2m_sysreg_resources),
 228 };
 229
 230 static struct platform_device v2m_muxfpga_device = {
 231         .name           = "vexpress-muxfpga",
 232         .id             = 0,
 233         .num_resources  = 1,
 234         .resource       = (struct resource []) {
 235                 VEXPRESS_RES_FUNC(0, 7),
 236         }
 237 };
 238
 239 static struct platform_device v2m_shutdown_device = {
 240         .name           = "vexpress-shutdown",
 241         .id             = 0,
 242         .num_resources  = 1,
 243         .resource       = (struct resource []) {
 244                 VEXPRESS_RES_FUNC(0, 8),
 245         }
 246 };
 247
 248 static struct platform_device v2m_reboot_device = {
 249         .name           = "vexpress-reboot",
 250         .id             = 0,
 251         .num_resources  = 1,
 252         .resource       = (struct resource []) {
 253                 VEXPRESS_RES_FUNC(0, 9),
 254         }
 255 };
 256
 257 static struct platform_device v2m_dvimode_device = {
 258         .name           = "vexpress-dvimode",
 259         .id             = 0,
 260         .num_resources  = 1,
 261         .resource       = (struct resource []) {
 262                 VEXPRESS_RES_FUNC(0, 11),
 263         }
 264 };
 265
 266 static AMBA_APB_DEVICE(aaci,  "mb:aaci",  0, V2M_AACI, IRQ_V2M_AACI, NULL);
 267 static AMBA_APB_DEVICE(mmci,  "mb:mmci",  0, V2M_MMCI, IRQ_V2M_MMCI, &v2m_mmci_data);
 268 static AMBA_APB_DEVICE(kmi0,  "mb:kmi0",  0, V2M_KMI0, IRQ_V2M_KMI0, NULL);
 269 static AMBA_APB_DEVICE(kmi1,  "mb:kmi1",  0, V2M_KMI1, IRQ_V2M_KMI1, NULL);
 270 static AMBA_APB_DEVICE(uart0, "mb:uart0", 0, V2M_UART0, IRQ_V2M_UART0, NULL);
 271 static AMBA_APB_DEVICE(uart1, "mb:uart1", 0, V2M_UART1, IRQ_V2M_UART1, NULL);
 272 static AMBA_APB_DEVICE(uart2, "mb:uart2", 0, V2M_UART2, IRQ_V2M_UART2, NULL);
 273 static AMBA_APB_DEVICE(uart3, "mb:uart3", 0, V2M_UART3, IRQ_V2M_UART3, NULL);
 274 static AMBA_APB_DEVICE(wdt,   "mb:wdt",   0, V2M_WDT, IRQ_V2M_WDT, NULL);
 275 static AMBA_APB_DEVICE(rtc,   "mb:rtc",   0, V2M_RTC, IRQ_V2M_RTC, NULL);
 276
 277 static struct amba_device *v2m_amba_devs[] __initdata = {
 278         &aaci_device,
 279         &mmci_device,
 280         &kmi0_device,
 281         &kmi1_device,
 282         &uart0_device,
 283         &uart1_device,
 284         &uart2_device,
 285         &uart3_device,
 286         &wdt_device,
 287         &rtc_device,
 288 };
 289
 290 static void __init v2m_timer_init(void)
 291 {
 292         vexpress_clk_init(ioremap(V2M_SYSCTL, SZ_4K));
 293         v2m_sp804_init(ioremap(V2M_TIMER01, SZ_4K), IRQ_V2M_TIMER0);
 294 }
 295
 296 static void __init v2m_init_early(void)
 297 {
 298         if (ct_desc->init_early)
 299                 ct_desc->init_early();
 300         versatile_sched_clock_init(vexpress_get_24mhz_clock_base(), 24000000);
 301 }
 302
 303 struct ct_desc *ct_desc;
 304
 305 static struct ct_desc *ct_descs[] __initdata = {
 306 #ifdef CONFIG_ARCH_VEXPRESS_CA9X4
 307         &ct_ca9x4_desc,
 308 #endif
 309 };
 310
 311 static void __init v2m_populate_ct_desc(void)
 312 {
 313         int i;
 314         u32 current_tile_id;
 315
 316         ct_desc = NULL;
 317         current_tile_id = vexpress_get_procid(VEXPRESS_SITE_MASTER)
 318                                 & V2M_CT_ID_MASK;
 319
 320         for (i = 0; i < ARRAY_SIZE(ct_descs) && !ct_desc; ++i)
 321                 if (ct_descs[i]->id == current_tile_id)
 322                         ct_desc = ct_descs[i];
 323
 324         if (!ct_desc)
 325                 panic("vexpress: this kernel does not support core tile ID 0x%08x when booting via ATAGs.\n"
 326                       "You may need a device tree blob or a different kernel to boot on this board.\n",
 327                       current_tile_id);
 328 }
 329
 330 static void __init v2m_map_io(void)
 331 {
 332         iotable_init(v2m_io_desc, ARRAY_SIZE(v2m_io_desc));
 333         vexpress_sysreg_early_init(ioremap(V2M_SYSREGS, SZ_4K));
 334         v2m_populate_ct_desc();
 335         ct_desc->map_io();
 336 }
 337
 338 static void __init v2m_init_irq(void)
 339 {
 340         ct_desc->init_irq();
 341 }
 342
 343 static void __init v2m_init(void)
 344 {
 345         int i;
 346
 347         regulator_register_fixed(0, v2m_eth_supplies,
 348                         ARRAY_SIZE(v2m_eth_supplies));
 349
 350         platform_device_register(&v2m_muxfpga_device);
 351         platform_device_register(&v2m_shutdown_device);
 352         platform_device_register(&v2m_reboot_device);
 353         platform_device_register(&v2m_dvimode_device);
 354
 355         platform_device_register(&v2m_sysreg_device);
 356         platform_device_register(&v2m_pcie_i2c_device);
 357         platform_device_register(&v2m_ddc_i2c_device);
 358         platform_device_register(&v2m_flash_device);
 359         platform_device_register(&v2m_cf_device);
 360         platform_device_register(&v2m_eth_device);
 361         platform_device_register(&v2m_usb_device);
 362
 363         for (i = 0; i < ARRAY_SIZE(v2m_amba_devs); i++)
 364                 amba_device_register(v2m_amba_devs[i], &iomem_resource);
 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 MACHINE_END
 378
 379 static struct map_desc v2m_rs1_io_desc __initdata = {
 380         .virtual        = V2M_PERIPH,
 381         .pfn            = __phys_to_pfn(0x1c000000),
 382         .length         = SZ_2M,
 383         .type           = MT_DEVICE,
 384 };
 385
 386 static int __init v2m_dt_scan_memory_map(unsigned long node, const char *uname,
 387                 int depth, void *data)
 388 {
 389         const char **map = data;
 390
 391         if (strcmp(uname, "motherboard") != 0)
 392                 return 0;
 393
 394         *map = of_get_flat_dt_prop(node, "arm,v2m-memory-map", NULL);
 395
 396         return 1;
 397 }
 398
 399 void __init v2m_dt_map_io(void)
 400 {
 401         const char *map = NULL;
 402
 403         of_scan_flat_dt(v2m_dt_scan_memory_map, &map);
 404
 405         if (map && strcmp(map, "rs1") == 0)
 406                 iotable_init(&v2m_rs1_io_desc, 1);
 407         else
 408                 iotable_init(v2m_io_desc, ARRAY_SIZE(v2m_io_desc));
 409
 410 #if defined(CONFIG_SMP)
 411         vexpress_dt_smp_map_io();
 412 #endif
 413 }
 414
 415 void __init v2m_dt_init_early(void)
 416 {
 417         u32 dt_hbi;
 418
 419         vexpress_sysreg_of_early_init();
 420
 421         /* Confirm board type against DT property, if available */
 422         if (of_property_read_u32(of_allnodes, "arm,hbi", &dt_hbi) == 0) {
 423                 u32 hbi = vexpress_get_hbi(VEXPRESS_SITE_MASTER);
 424
 425                 if (WARN_ON(dt_hbi != hbi))
 426                         pr_warning("vexpress: DT HBI (%x) is not matching "
 427                                         "hardware (%x)!\n", dt_hbi, hbi);
 428         }
 429 }
 430
 431 static void __init v2m_dt_timer_init(void)
 432 {
 433         struct device_node *node = NULL;
 434
 435         of_clk_init(NULL);
 436
 437         do {
 438                 node = of_find_compatible_node(node, NULL, "arm,sp804");
 439         } while (node && vexpress_get_site_by_node(node) != VEXPRESS_SITE_MB);
 440         if (node) {
 441                 pr_info("Using SP804 '%s' as a clock & events source\n",
 442                                 node->full_name);
 443                 WARN_ON(clk_register_clkdev(of_clk_get_by_name(node,
 444                                 "timclken1"), "v2m-timer0", "sp804"));
 445                 WARN_ON(clk_register_clkdev(of_clk_get_by_name(node,
 446                                 "timclken2"), "v2m-timer1", "sp804"));
 447                 v2m_sp804_init(of_iomap(node, 0),
 448                                 irq_of_parse_and_map(node, 0));
 449         }
 450
 451         if (arch_timer_of_register() != 0)
 452                 twd_local_timer_of_register();
 453
 454         if (arch_timer_sched_clock_init() != 0)
 455                 versatile_sched_clock_init(vexpress_get_24mhz_clock_base(),
 456                                 24000000);
 457 }
 458
 459 static const struct of_device_id v2m_dt_bus_match[] __initconst = {
 460         { .compatible = "simple-bus", },
 461         { .compatible = "arm,amba-bus", },
 462         { .compatible = "arm,vexpress,config-bus", },
 463         {}
 464 };
 465
 466 static void __init v2m_dt_init(void)
 467 {
 468         l2x0_of_init(0x00400000, 0xfe0fffff);
 469         of_platform_populate(NULL, v2m_dt_bus_match, NULL, NULL);
 470 }
 471
 472 static const char * const v2m_dt_match[] __initconst = {
 473         "arm,vexpress",
 474         "xen,xenvm",
 475         NULL,
 476 };
 477
 478 DT_MACHINE_START(VEXPRESS_DT, "ARM-Versatile Express")
 479         .dt_compat      = v2m_dt_match,
 480         .smp            = smp_ops(vexpress_smp_ops),
 481         .map_io         = v2m_dt_map_io,
 482         .init_early     = v2m_dt_init_early,
 483         .init_irq       = irqchip_init,
 484         .init_time      = v2m_dt_timer_init,
 485         .init_machine   = v2m_dt_init,
 486 MACHINE_END