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