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
  17 #include <asm/mach-types.h>
  18 #include <asm/sizes.h>
  19 #include <asm/mach/arch.h>
  20 #include <asm/mach/flash.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_init_early(void)
  50 {
  51         ct_desc->init_early();
  52         versatile_sched_clock_init(MMIO_P2V(V2M_SYS_24MHZ), 24000000);
  53 }
  54
  55 static void __init v2m_timer_init(void)
  56 {
  57         u32 scctrl;
  58
  59         /* Select 1MHz TIMCLK as the reference clock for SP804 timers */
  60         scctrl = readl(MMIO_P2V(V2M_SYSCTL + SCCTRL));
  61         scctrl |= SCCTRL_TIMEREN0SEL_TIMCLK;
  62         scctrl |= SCCTRL_TIMEREN1SEL_TIMCLK;
  63         writel(scctrl, MMIO_P2V(V2M_SYSCTL + SCCTRL));
  64
  65         writel(0, MMIO_P2V(V2M_TIMER0) + TIMER_CTRL);
  66         writel(0, MMIO_P2V(V2M_TIMER1) + TIMER_CTRL);
  67
  68         sp804_clocksource_init(MMIO_P2V(V2M_TIMER1), "v2m-timer1");
  69         sp804_clockevents_init(MMIO_P2V(V2M_TIMER0), IRQ_V2M_TIMER0,
  70                 "v2m-timer0");
  71 }
  72
  73 static struct sys_timer v2m_timer = {
  74         .init   = v2m_timer_init,
  75 };
  76
  77
  78 static DEFINE_SPINLOCK(v2m_cfg_lock);
  79
  80 int v2m_cfg_write(u32 devfn, u32 data)
  81 {
  82         /* Configuration interface broken? */
  83         u32 val;
  84
  85         printk("%s: writing %08x to %08x\n", __func__, data, devfn);
  86
  87         devfn |= SYS_CFG_START | SYS_CFG_WRITE;
  88
  89         spin_lock(&v2m_cfg_lock);
  90         val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
  91         writel(val & ~SYS_CFG_COMPLETE, MMIO_P2V(V2M_SYS_CFGSTAT));
  92
  93         writel(data, MMIO_P2V(V2M_SYS_CFGDATA));
  94         writel(devfn, MMIO_P2V(V2M_SYS_CFGCTRL));
  95
  96         do {
  97                 val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
  98         } while (val == 0);
  99         spin_unlock(&v2m_cfg_lock);
 100
 101         return !!(val & SYS_CFG_ERR);
 102 }
 103
 104 int v2m_cfg_read(u32 devfn, u32 *data)
 105 {
 106         u32 val;
 107
 108         devfn |= SYS_CFG_START;
 109
 110         spin_lock(&v2m_cfg_lock);
 111         writel(0, MMIO_P2V(V2M_SYS_CFGSTAT));
 112         writel(devfn, MMIO_P2V(V2M_SYS_CFGCTRL));
 113
 114         mb();
 115
 116         do {
 117                 cpu_relax();
 118                 val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
 119         } while (val == 0);
 120
 121         *data = readl(MMIO_P2V(V2M_SYS_CFGDATA));
 122         spin_unlock(&v2m_cfg_lock);
 123
 124         return !!(val & SYS_CFG_ERR);
 125 }
 126
 127
 128 static struct resource v2m_pcie_i2c_resource = {
 129         .start  = V2M_SERIAL_BUS_PCI,
 130         .end    = V2M_SERIAL_BUS_PCI + SZ_4K - 1,
 131         .flags  = IORESOURCE_MEM,
 132 };
 133
 134 static struct platform_device v2m_pcie_i2c_device = {
 135         .name           = "versatile-i2c",
 136         .id             = 0,
 137         .num_resources  = 1,
 138         .resource       = &v2m_pcie_i2c_resource,
 139 };
 140
 141 static struct resource v2m_ddc_i2c_resource = {
 142         .start  = V2M_SERIAL_BUS_DVI,
 143         .end    = V2M_SERIAL_BUS_DVI + SZ_4K - 1,
 144         .flags  = IORESOURCE_MEM,
 145 };
 146
 147 static struct platform_device v2m_ddc_i2c_device = {
 148         .name           = "versatile-i2c",
 149         .id             = 1,
 150         .num_resources  = 1,
 151         .resource       = &v2m_ddc_i2c_resource,
 152 };
 153
 154 static struct resource v2m_eth_resources[] = {
 155         {
 156                 .start  = V2M_LAN9118,
 157                 .end    = V2M_LAN9118 + SZ_64K - 1,
 158                 .flags  = IORESOURCE_MEM,
 159         }, {
 160                 .start  = IRQ_V2M_LAN9118,
 161                 .end    = IRQ_V2M_LAN9118,
 162                 .flags  = IORESOURCE_IRQ,
 163         },
 164 };
 165
 166 static struct smsc911x_platform_config v2m_eth_config = {
 167         .flags          = SMSC911X_USE_32BIT,
 168         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH,
 169         .irq_type       = SMSC911X_IRQ_TYPE_PUSH_PULL,
 170         .phy_interface  = PHY_INTERFACE_MODE_MII,
 171 };
 172
 173 static struct platform_device v2m_eth_device = {
 174         .name           = "smsc911x",
 175         .id             = -1,
 176         .resource       = v2m_eth_resources,
 177         .num_resources  = ARRAY_SIZE(v2m_eth_resources),
 178         .dev.platform_data = &v2m_eth_config,
 179 };
 180
 181 static struct resource v2m_usb_resources[] = {
 182         {
 183                 .start  = V2M_ISP1761,
 184                 .end    = V2M_ISP1761 + SZ_128K - 1,
 185                 .flags  = IORESOURCE_MEM,
 186         }, {
 187                 .start  = IRQ_V2M_ISP1761,
 188                 .end    = IRQ_V2M_ISP1761,
 189                 .flags  = IORESOURCE_IRQ,
 190         },
 191 };
 192
 193 static struct isp1760_platform_data v2m_usb_config = {
 194         .is_isp1761             = true,
 195         .bus_width_16           = false,
 196         .port1_otg              = true,
 197         .analog_oc              = false,
 198         .dack_polarity_high     = false,
 199         .dreq_polarity_high     = false,
 200 };
 201
 202 static struct platform_device v2m_usb_device = {
 203         .name           = "isp1760",
 204         .id             = -1,
 205         .resource       = v2m_usb_resources,
 206         .num_resources  = ARRAY_SIZE(v2m_usb_resources),
 207         .dev.platform_data = &v2m_usb_config,
 208 };
 209
 210 static int v2m_flash_init(void)
 211 {
 212         writel(0, MMIO_P2V(V2M_SYS_FLASH));
 213         return 0;
 214 }
 215
 216 static void v2m_flash_exit(void)
 217 {
 218         writel(0, MMIO_P2V(V2M_SYS_FLASH));
 219 }
 220
 221 static void v2m_flash_set_vpp(int on)
 222 {
 223         writel(on != 0, MMIO_P2V(V2M_SYS_FLASH));
 224 }
 225
 226 static struct flash_platform_data v2m_flash_data = {
 227         .map_name       = "cfi_probe",
 228         .width          = 4,
 229         .init           = v2m_flash_init,
 230         .exit           = v2m_flash_exit,
 231         .set_vpp        = v2m_flash_set_vpp,
 232 };
 233
 234 static struct resource v2m_flash_resources[] = {
 235         {
 236                 .start  = V2M_NOR0,
 237                 .end    = V2M_NOR0 + SZ_64M - 1,
 238                 .flags  = IORESOURCE_MEM,
 239         }, {
 240                 .start  = V2M_NOR1,
 241                 .end    = V2M_NOR1 + SZ_64M - 1,
 242                 .flags  = IORESOURCE_MEM,
 243         },
 244 };
 245
 246 static struct platform_device v2m_flash_device = {
 247         .name           = "armflash",
 248         .id             = -1,
 249         .resource       = v2m_flash_resources,
 250         .num_resources  = ARRAY_SIZE(v2m_flash_resources),
 251         .dev.platform_data = &v2m_flash_data,
 252 };
 253
 254 static struct pata_platform_info v2m_pata_data = {
 255         .ioport_shift   = 2,
 256 };
 257
 258 static struct resource v2m_pata_resources[] = {
 259         {
 260                 .start  = V2M_CF,
 261                 .end    = V2M_CF + 0xff,
 262                 .flags  = IORESOURCE_MEM,
 263         }, {
 264                 .start  = V2M_CF + 0x100,
 265                 .end    = V2M_CF + SZ_4K - 1,
 266                 .flags  = IORESOURCE_MEM,
 267         },
 268 };
 269
 270 static struct platform_device v2m_cf_device = {
 271         .name           = "pata_platform",
 272         .id             = -1,
 273         .resource       = v2m_pata_resources,
 274         .num_resources  = ARRAY_SIZE(v2m_pata_resources),
 275         .dev.platform_data = &v2m_pata_data,
 276 };
 277
 278 static unsigned int v2m_mmci_status(struct device *dev)
 279 {
 280         return readl(MMIO_P2V(V2M_SYS_MCI)) & (1 << 0);
 281 }
 282
 283 static struct mmci_platform_data v2m_mmci_data = {
 284         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 285         .status         = v2m_mmci_status,
 286 };
 287
 288 static AMBA_DEVICE(aaci,  "mb:aaci",  V2M_AACI, NULL);
 289 static AMBA_DEVICE(mmci,  "mb:mmci",  V2M_MMCI, &v2m_mmci_data);
 290 static AMBA_DEVICE(kmi0,  "mb:kmi0",  V2M_KMI0, NULL);
 291 static AMBA_DEVICE(kmi1,  "mb:kmi1",  V2M_KMI1, NULL);
 292 static AMBA_DEVICE(uart0, "mb:uart0", V2M_UART0, NULL);
 293 static AMBA_DEVICE(uart1, "mb:uart1", V2M_UART1, NULL);
 294 static AMBA_DEVICE(uart2, "mb:uart2", V2M_UART2, NULL);
 295 static AMBA_DEVICE(uart3, "mb:uart3", V2M_UART3, NULL);
 296 static AMBA_DEVICE(wdt,   "mb:wdt",   V2M_WDT, NULL);
 297 static AMBA_DEVICE(rtc,   "mb:rtc",   V2M_RTC, NULL);
 298
 299 static struct amba_device *v2m_amba_devs[] __initdata = {
 300         &aaci_device,
 301         &mmci_device,
 302         &kmi0_device,
 303         &kmi1_device,
 304         &uart0_device,
 305         &uart1_device,
 306         &uart2_device,
 307         &uart3_device,
 308         &wdt_device,
 309         &rtc_device,
 310 };
 311
 312
 313 static long v2m_osc_round(struct clk *clk, unsigned long rate)
 314 {
 315         return rate;
 316 }
 317
 318 static int v2m_osc1_set(struct clk *clk, unsigned long rate)
 319 {
 320         return v2m_cfg_write(SYS_CFG_OSC | SYS_CFG_SITE_MB | 1, rate);
 321 }
 322
 323 static const struct clk_ops osc1_clk_ops = {
 324         .round  = v2m_osc_round,
 325         .set    = v2m_osc1_set,
 326 };
 327
 328 static struct clk osc1_clk = {
 329         .ops    = &osc1_clk_ops,
 330         .rate   = 24000000,
 331 };
 332
 333 static struct clk osc2_clk = {
 334         .rate   = 24000000,
 335 };
 336
 337 static struct clk v2m_sp804_clk = {
 338         .rate   = 1000000,
 339 };
 340
 341 static struct clk dummy_apb_pclk;
 342
 343 static struct clk_lookup v2m_lookups[] = {
 344         {       /* AMBA bus clock */
 345                 .con_id         = "apb_pclk",
 346                 .clk            = &dummy_apb_pclk,
 347         }, {    /* UART0 */
 348                 .dev_id         = "mb:uart0",
 349                 .clk            = &osc2_clk,
 350         }, {    /* UART1 */
 351                 .dev_id         = "mb:uart1",
 352                 .clk            = &osc2_clk,
 353         }, {    /* UART2 */
 354                 .dev_id         = "mb:uart2",
 355                 .clk            = &osc2_clk,
 356         }, {    /* UART3 */
 357                 .dev_id         = "mb:uart3",
 358                 .clk            = &osc2_clk,
 359         }, {    /* KMI0 */
 360                 .dev_id         = "mb:kmi0",
 361                 .clk            = &osc2_clk,
 362         }, {    /* KMI1 */
 363                 .dev_id         = "mb:kmi1",
 364                 .clk            = &osc2_clk,
 365         }, {    /* MMC0 */
 366                 .dev_id         = "mb:mmci",
 367                 .clk            = &osc2_clk,
 368         }, {    /* CLCD */
 369                 .dev_id         = "mb:clcd",
 370                 .clk            = &osc1_clk,
 371         }, {    /* SP804 timers */
 372                 .dev_id         = "sp804",
 373                 .con_id         = "v2m-timer1",
 374                 .clk            = &v2m_sp804_clk,
 375         },
 376 };
 377
 378 static void v2m_power_off(void)
 379 {
 380         if (v2m_cfg_write(SYS_CFG_SHUTDOWN | SYS_CFG_SITE_MB, 0))
 381                 printk(KERN_EMERG "Unable to shutdown\n");
 382 }
 383
 384 static void v2m_restart(char str, const char *cmd)
 385 {
 386         if (v2m_cfg_write(SYS_CFG_REBOOT | SYS_CFG_SITE_MB, 0))
 387                 printk(KERN_EMERG "Unable to reboot\n");
 388 }
 389
 390 struct ct_desc *ct_desc;
 391
 392 static struct ct_desc *ct_descs[] __initdata = {
 393 #ifdef CONFIG_ARCH_VEXPRESS_CA9X4
 394         &ct_ca9x4_desc,
 395 #endif
 396 };
 397
 398 static void __init v2m_populate_ct_desc(void)
 399 {
 400         int i;
 401         u32 current_tile_id;
 402
 403         ct_desc = NULL;
 404         current_tile_id = readl(MMIO_P2V(V2M_SYS_PROCID0)) & V2M_CT_ID_MASK;
 405
 406         for (i = 0; i < ARRAY_SIZE(ct_descs) && !ct_desc; ++i)
 407                 if (ct_descs[i]->id == current_tile_id)
 408                         ct_desc = ct_descs[i];
 409
 410         if (!ct_desc)
 411                 panic("vexpress: failed to populate core tile description "
 412                       "for tile ID 0x%8x\n", current_tile_id);
 413 }
 414
 415 static void __init v2m_map_io(void)
 416 {
 417         iotable_init(v2m_io_desc, ARRAY_SIZE(v2m_io_desc));
 418         v2m_populate_ct_desc();
 419         ct_desc->map_io();
 420 }
 421
 422 static void __init v2m_init_irq(void)
 423 {
 424         ct_desc->init_irq();
 425 }
 426
 427 static void __init v2m_init(void)
 428 {
 429         int i;
 430
 431         clkdev_add_table(v2m_lookups, ARRAY_SIZE(v2m_lookups));
 432
 433         platform_device_register(&v2m_pcie_i2c_device);
 434         platform_device_register(&v2m_ddc_i2c_device);
 435         platform_device_register(&v2m_flash_device);
 436         platform_device_register(&v2m_cf_device);
 437         platform_device_register(&v2m_eth_device);
 438         platform_device_register(&v2m_usb_device);
 439
 440         for (i = 0; i < ARRAY_SIZE(v2m_amba_devs); i++)
 441                 amba_device_register(v2m_amba_devs[i], &iomem_resource);
 442
 443         pm_power_off = v2m_power_off;
 444         arm_pm_restart = v2m_restart;
 445
 446         ct_desc->init_tile();
 447 }
 448
 449 MACHINE_START(VEXPRESS, "ARM-Versatile Express")
 450         .boot_params    = PLAT_PHYS_OFFSET + 0x00000100,
 451         .map_io         = v2m_map_io,
 452         .init_early     = v2m_init_early,
 453         .init_irq       = v2m_init_irq,
 454         .timer          = &v2m_timer,
 455         .init_machine   = v2m_init,
 456 MACHINE_END