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