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/init.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/ata_platform.h>
  11 #include <linux/smsc911x.h>
  12 #include <linux/spinlock.h>
  13 #include <linux/sysdev.h>
  14 #include <linux/usb/isp1760.h>
  15 #include <linux/clkdev.h>
  16 #include <linux/mtd/physmap.h>
  17
  18 #include <asm/mach-types.h>
  19 #include <asm/sizes.h>
  20 #include <asm/mach/arch.h>
  21 #include <asm/mach/map.h>
  22 #include <asm/mach/time.h>
  23 #include <asm/hardware/arm_timer.h>
  24 #include <asm/hardware/timer-sp.h>
  25 #include <asm/hardware/sp810.h>
  26
  27 #include <mach/ct-ca9x4.h>
  28 #include <mach/motherboard.h>
  29
  30 #include <plat/sched_clock.h>
  31
  32 #include "core.h"
  33
  34 #define V2M_PA_CS0      0x40000000
  35 #define V2M_PA_CS1      0x44000000
  36 #define V2M_PA_CS2      0x48000000
  37 #define V2M_PA_CS3      0x4c000000
  38 #define V2M_PA_CS7      0x10000000
  39
  40 static struct map_desc v2m_io_desc[] __initdata = {
  41         {
  42                 .virtual        = __MMIO_P2V(V2M_PA_CS7),
  43                 .pfn            = __phys_to_pfn(V2M_PA_CS7),
  44                 .length         = SZ_128K,
  45                 .type           = MT_DEVICE,
  46         },
  47 };
  48
  49 static void __init v2m_timer_init(void)
  50 {
  51         u32 scctrl;
  52
  53         /* Select 1MHz TIMCLK as the reference clock for SP804 timers */
  54         scctrl = readl(MMIO_P2V(V2M_SYSCTL + SCCTRL));
  55         scctrl |= SCCTRL_TIMEREN0SEL_TIMCLK;
  56         scctrl |= SCCTRL_TIMEREN1SEL_TIMCLK;
  57         writel(scctrl, MMIO_P2V(V2M_SYSCTL + SCCTRL));
  58
  59         writel(0, MMIO_P2V(V2M_TIMER0) + TIMER_CTRL);
  60         writel(0, MMIO_P2V(V2M_TIMER1) + TIMER_CTRL);
  61
  62         sp804_clocksource_init(MMIO_P2V(V2M_TIMER1), "v2m-timer1");
  63         sp804_clockevents_init(MMIO_P2V(V2M_TIMER0), IRQ_V2M_TIMER0,
  64                 "v2m-timer0");
  65 }
  66
  67 static struct sys_timer v2m_timer = {
  68         .init   = v2m_timer_init,
  69 };
  70
  71
  72 static DEFINE_SPINLOCK(v2m_cfg_lock);
  73
  74 int v2m_cfg_write(u32 devfn, u32 data)
  75 {
  76         /* Configuration interface broken? */
  77         u32 val;
  78
  79         printk("%s: writing %08x to %08x\n", __func__, data, devfn);
  80
  81         devfn |= SYS_CFG_START | SYS_CFG_WRITE;
  82
  83         spin_lock(&v2m_cfg_lock);
  84         val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
  85         writel(val & ~SYS_CFG_COMPLETE, MMIO_P2V(V2M_SYS_CFGSTAT));
  86
  87         writel(data, MMIO_P2V(V2M_SYS_CFGDATA));
  88         writel(devfn, MMIO_P2V(V2M_SYS_CFGCTRL));
  89
  90         do {
  91                 val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
  92         } while (val == 0);
  93         spin_unlock(&v2m_cfg_lock);
  94
  95         return !!(val & SYS_CFG_ERR);
  96 }
  97
  98 int v2m_cfg_read(u32 devfn, u32 *data)
  99 {
 100         u32 val;
 101
 102         devfn |= SYS_CFG_START;
 103
 104         spin_lock(&v2m_cfg_lock);
 105         writel(0, MMIO_P2V(V2M_SYS_CFGSTAT));
 106         writel(devfn, MMIO_P2V(V2M_SYS_CFGCTRL));
 107
 108         mb();
 109
 110         do {
 111                 cpu_relax();
 112                 val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
 113         } while (val == 0);
 114
 115         *data = readl(MMIO_P2V(V2M_SYS_CFGDATA));
 116         spin_unlock(&v2m_cfg_lock);
 117
 118         return !!(val & SYS_CFG_ERR);
 119 }
 120
 121
 122 static struct resource v2m_pcie_i2c_resource = {
 123         .start  = V2M_SERIAL_BUS_PCI,
 124         .end    = V2M_SERIAL_BUS_PCI + SZ_4K - 1,
 125         .flags  = IORESOURCE_MEM,
 126 };
 127
 128 static struct platform_device v2m_pcie_i2c_device = {
 129         .name           = "versatile-i2c",
 130         .id             = 0,
 131         .num_resources  = 1,
 132         .resource       = &v2m_pcie_i2c_resource,
 133 };
 134
 135 static struct resource v2m_ddc_i2c_resource = {
 136         .start  = V2M_SERIAL_BUS_DVI,
 137         .end    = V2M_SERIAL_BUS_DVI + SZ_4K - 1,
 138         .flags  = IORESOURCE_MEM,
 139 };
 140
 141 static struct platform_device v2m_ddc_i2c_device = {
 142         .name           = "versatile-i2c",
 143         .id             = 1,
 144         .num_resources  = 1,
 145         .resource       = &v2m_ddc_i2c_resource,
 146 };
 147
 148 static struct resource v2m_eth_resources[] = {
 149         {
 150                 .start  = V2M_LAN9118,
 151                 .end    = V2M_LAN9118 + SZ_64K - 1,
 152                 .flags  = IORESOURCE_MEM,
 153         }, {
 154                 .start  = IRQ_V2M_LAN9118,
 155                 .end    = IRQ_V2M_LAN9118,
 156                 .flags  = IORESOURCE_IRQ,
 157         },
 158 };
 159
 160 static struct smsc911x_platform_config v2m_eth_config = {
 161         .flags          = SMSC911X_USE_32BIT,
 162         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH,
 163         .irq_type       = SMSC911X_IRQ_TYPE_PUSH_PULL,
 164         .phy_interface  = PHY_INTERFACE_MODE_MII,
 165 };
 166
 167 static struct platform_device v2m_eth_device = {
 168         .name           = "smsc911x",
 169         .id             = -1,
 170         .resource       = v2m_eth_resources,
 171         .num_resources  = ARRAY_SIZE(v2m_eth_resources),
 172         .dev.platform_data = &v2m_eth_config,
 173 };
 174
 175 static struct resource v2m_usb_resources[] = {
 176         {
 177                 .start  = V2M_ISP1761,
 178                 .end    = V2M_ISP1761 + SZ_128K - 1,
 179                 .flags  = IORESOURCE_MEM,
 180         }, {
 181                 .start  = IRQ_V2M_ISP1761,
 182                 .end    = IRQ_V2M_ISP1761,
 183                 .flags  = IORESOURCE_IRQ,
 184         },
 185 };
 186
 187 static struct isp1760_platform_data v2m_usb_config = {
 188         .is_isp1761             = true,
 189         .bus_width_16           = false,
 190         .port1_otg              = true,
 191         .analog_oc              = false,
 192         .dack_polarity_high     = false,
 193         .dreq_polarity_high     = false,
 194 };
 195
 196 static struct platform_device v2m_usb_device = {
 197         .name           = "isp1760",
 198         .id             = -1,
 199         .resource       = v2m_usb_resources,
 200         .num_resources  = ARRAY_SIZE(v2m_usb_resources),
 201         .dev.platform_data = &v2m_usb_config,
 202 };
 203
 204 static void v2m_flash_set_vpp(struct platform_device *pdev, int on)
 205 {
 206         writel(on != 0, MMIO_P2V(V2M_SYS_FLASH));
 207 }
 208
 209 static struct physmap_flash_data v2m_flash_data = {
 210         .width          = 4,
 211         .set_vpp        = v2m_flash_set_vpp,
 212 };
 213
 214 static struct resource v2m_flash_resources[] = {
 215         {
 216                 .start  = V2M_NOR0,
 217                 .end    = V2M_NOR0 + SZ_64M - 1,
 218                 .flags  = IORESOURCE_MEM,
 219         }, {
 220                 .start  = V2M_NOR1,
 221                 .end    = V2M_NOR1 + SZ_64M - 1,
 222                 .flags  = IORESOURCE_MEM,
 223         },
 224 };
 225
 226 static struct platform_device v2m_flash_device = {
 227         .name           = "physmap-flash",
 228         .id             = -1,
 229         .resource       = v2m_flash_resources,
 230         .num_resources  = ARRAY_SIZE(v2m_flash_resources),
 231         .dev.platform_data = &v2m_flash_data,
 232 };
 233
 234 static struct pata_platform_info v2m_pata_data = {
 235         .ioport_shift   = 2,
 236 };
 237
 238 static struct resource v2m_pata_resources[] = {
 239         {
 240                 .start  = V2M_CF,
 241                 .end    = V2M_CF + 0xff,
 242                 .flags  = IORESOURCE_MEM,
 243         }, {
 244                 .start  = V2M_CF + 0x100,
 245                 .end    = V2M_CF + SZ_4K - 1,
 246                 .flags  = IORESOURCE_MEM,
 247         },
 248 };
 249
 250 static struct platform_device v2m_cf_device = {
 251         .name           = "pata_platform",
 252         .id             = -1,
 253         .resource       = v2m_pata_resources,
 254         .num_resources  = ARRAY_SIZE(v2m_pata_resources),
 255         .dev.platform_data = &v2m_pata_data,
 256 };
 257
 258 static unsigned int v2m_mmci_status(struct device *dev)
 259 {
 260         return readl(MMIO_P2V(V2M_SYS_MCI)) & (1 << 0);
 261 }
 262
 263 static struct mmci_platform_data v2m_mmci_data = {
 264         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 265         .status         = v2m_mmci_status,
 266 };
 267
 268 static AMBA_DEVICE(aaci,  "mb:aaci",  V2M_AACI, NULL);
 269 static AMBA_DEVICE(mmci,  "mb:mmci",  V2M_MMCI, &v2m_mmci_data);
 270 static AMBA_DEVICE(kmi0,  "mb:kmi0",  V2M_KMI0, NULL);
 271 static AMBA_DEVICE(kmi1,  "mb:kmi1",  V2M_KMI1, NULL);
 272 static AMBA_DEVICE(uart0, "mb:uart0", V2M_UART0, NULL);
 273 static AMBA_DEVICE(uart1, "mb:uart1", V2M_UART1, NULL);
 274 static AMBA_DEVICE(uart2, "mb:uart2", V2M_UART2, NULL);
 275 static AMBA_DEVICE(uart3, "mb:uart3", V2M_UART3, NULL);
 276 static AMBA_DEVICE(wdt,   "mb:wdt",   V2M_WDT, NULL);
 277 static AMBA_DEVICE(rtc,   "mb:rtc",   V2M_RTC, NULL);
 278
 279 static struct amba_device *v2m_amba_devs[] __initdata = {
 280         &aaci_device,
 281         &mmci_device,
 282         &kmi0_device,
 283         &kmi1_device,
 284         &uart0_device,
 285         &uart1_device,
 286         &uart2_device,
 287         &uart3_device,
 288         &wdt_device,
 289         &rtc_device,
 290 };
 291
 292
 293 static long v2m_osc_round(struct clk *clk, unsigned long rate)
 294 {
 295         return rate;
 296 }
 297
 298 static int v2m_osc1_set(struct clk *clk, unsigned long rate)
 299 {
 300         return v2m_cfg_write(SYS_CFG_OSC | SYS_CFG_SITE_MB | 1, rate);
 301 }
 302
 303 static const struct clk_ops osc1_clk_ops = {
 304         .round  = v2m_osc_round,
 305         .set    = v2m_osc1_set,
 306 };
 307
 308 static struct clk osc1_clk = {
 309         .ops    = &osc1_clk_ops,
 310         .rate   = 24000000,
 311 };
 312
 313 static struct clk osc2_clk = {
 314         .rate   = 24000000,
 315 };
 316
 317 static struct clk v2m_sp804_clk = {
 318         .rate   = 1000000,
 319 };
 320
 321 static struct clk v2m_ref_clk = {
 322         .rate   = 32768,
 323 };
 324
 325 static struct clk dummy_apb_pclk;
 326
 327 static struct clk_lookup v2m_lookups[] = {
 328         {       /* AMBA bus clock */
 329                 .con_id         = "apb_pclk",
 330                 .clk            = &dummy_apb_pclk,
 331         }, {    /* UART0 */
 332                 .dev_id         = "mb:uart0",
 333                 .clk            = &osc2_clk,
 334         }, {    /* UART1 */
 335                 .dev_id         = "mb:uart1",
 336                 .clk            = &osc2_clk,
 337         }, {    /* UART2 */
 338                 .dev_id         = "mb:uart2",
 339                 .clk            = &osc2_clk,
 340         }, {    /* UART3 */
 341                 .dev_id         = "mb:uart3",
 342                 .clk            = &osc2_clk,
 343         }, {    /* KMI0 */
 344                 .dev_id         = "mb:kmi0",
 345                 .clk            = &osc2_clk,
 346         }, {    /* KMI1 */
 347                 .dev_id         = "mb:kmi1",
 348                 .clk            = &osc2_clk,
 349         }, {    /* MMC0 */
 350                 .dev_id         = "mb:mmci",
 351                 .clk            = &osc2_clk,
 352         }, {    /* CLCD */
 353                 .dev_id         = "mb:clcd",
 354                 .clk            = &osc1_clk,
 355         }, {    /* SP805 WDT */
 356                 .dev_id         = "mb:wdt",
 357                 .clk            = &v2m_ref_clk,
 358         }, {    /* SP804 timers */
 359                 .dev_id         = "sp804",
 360                 .con_id         = "v2m-timer0",
 361                 .clk            = &v2m_sp804_clk,
 362         }, {    /* SP804 timers */
 363                 .dev_id         = "sp804",
 364                 .con_id         = "v2m-timer1",
 365                 .clk            = &v2m_sp804_clk,
 366         },
 367 };
 368
 369 static void __init v2m_init_early(void)
 370 {
 371         ct_desc->init_early();
 372         clkdev_add_table(v2m_lookups, ARRAY_SIZE(v2m_lookups));
 373         versatile_sched_clock_init(MMIO_P2V(V2M_SYS_24MHZ), 24000000);
 374 }
 375
 376 static void v2m_power_off(void)
 377 {
 378         if (v2m_cfg_write(SYS_CFG_SHUTDOWN | SYS_CFG_SITE_MB, 0))
 379                 printk(KERN_EMERG "Unable to shutdown\n");
 380 }
 381
 382 static void v2m_restart(char str, const char *cmd)
 383 {
 384         if (v2m_cfg_write(SYS_CFG_REBOOT | SYS_CFG_SITE_MB, 0))
 385                 printk(KERN_EMERG "Unable to reboot\n");
 386 }
 387
 388 struct ct_desc *ct_desc;
 389
 390 static struct ct_desc *ct_descs[] __initdata = {
 391 #ifdef CONFIG_ARCH_VEXPRESS_CA9X4
 392         &ct_ca9x4_desc,
 393 #endif
 394 };
 395
 396 static void __init v2m_populate_ct_desc(void)
 397 {
 398         int i;
 399         u32 current_tile_id;
 400
 401         ct_desc = NULL;
 402         current_tile_id = readl(MMIO_P2V(V2M_SYS_PROCID0)) & V2M_CT_ID_MASK;
 403
 404         for (i = 0; i < ARRAY_SIZE(ct_descs) && !ct_desc; ++i)
 405                 if (ct_descs[i]->id == current_tile_id)
 406                         ct_desc = ct_descs[i];
 407
 408         if (!ct_desc)
 409                 panic("vexpress: failed to populate core tile description "
 410                       "for tile ID 0x%8x\n", current_tile_id);
 411 }
 412
 413 static void __init v2m_map_io(void)
 414 {
 415         iotable_init(v2m_io_desc, ARRAY_SIZE(v2m_io_desc));
 416         v2m_populate_ct_desc();
 417         ct_desc->map_io();
 418 }
 419
 420 static void __init v2m_init_irq(void)
 421 {
 422         ct_desc->init_irq();
 423 }
 424
 425 static void __init v2m_init(void)
 426 {
 427         int i;
 428
 429         platform_device_register(&v2m_pcie_i2c_device);
 430         platform_device_register(&v2m_ddc_i2c_device);
 431         platform_device_register(&v2m_flash_device);
 432         platform_device_register(&v2m_cf_device);
 433         platform_device_register(&v2m_eth_device);
 434         platform_device_register(&v2m_usb_device);
 435
 436         for (i = 0; i < ARRAY_SIZE(v2m_amba_devs); i++)
 437                 amba_device_register(v2m_amba_devs[i], &iomem_resource);
 438
 439         pm_power_off = v2m_power_off;
 440         arm_pm_restart = v2m_restart;
 441
 442         ct_desc->init_tile();
 443 }
 444
 445 MACHINE_START(VEXPRESS, "ARM-Versatile Express")
 446         .atag_offset    = 0x100,
 447         .map_io         = v2m_map_io,
 448         .init_early     = v2m_init_early,
 449         .init_irq       = v2m_init_irq,
 450         .timer          = &v2m_timer,
 451         .init_machine   = v2m_init,
 452 MACHINE_END