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_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 void v2m_flash_set_vpp(struct platform_device *pdev, int on)
 211 {
 212         writel(on != 0, MMIO_P2V(V2M_SYS_FLASH));
 213 }
 214
 215 static struct physmap_flash_data v2m_flash_data = {
 216         .width          = 4,
 217         .set_vpp        = v2m_flash_set_vpp,
 218 };
 219
 220 static struct resource v2m_flash_resources[] = {
 221         {
 222                 .start  = V2M_NOR0,
 223                 .end    = V2M_NOR0 + SZ_64M - 1,
 224                 .flags  = IORESOURCE_MEM,
 225         }, {
 226                 .start  = V2M_NOR1,
 227                 .end    = V2M_NOR1 + SZ_64M - 1,
 228                 .flags  = IORESOURCE_MEM,
 229         },
 230 };
 231
 232 static struct platform_device v2m_flash_device = {
 233         .name           = "physmap-flash",
 234         .id             = -1,
 235         .resource       = v2m_flash_resources,
 236         .num_resources  = ARRAY_SIZE(v2m_flash_resources),
 237         .dev.platform_data = &v2m_flash_data,
 238 };
 239
 240 static struct pata_platform_info v2m_pata_data = {
 241         .ioport_shift   = 2,
 242 };
 243
 244 static struct resource v2m_pata_resources[] = {
 245         {
 246                 .start  = V2M_CF,
 247                 .end    = V2M_CF + 0xff,
 248                 .flags  = IORESOURCE_MEM,
 249         }, {
 250                 .start  = V2M_CF + 0x100,
 251                 .end    = V2M_CF + SZ_4K - 1,
 252                 .flags  = IORESOURCE_MEM,
 253         },
 254 };
 255
 256 static struct platform_device v2m_cf_device = {
 257         .name           = "pata_platform",
 258         .id             = -1,
 259         .resource       = v2m_pata_resources,
 260         .num_resources  = ARRAY_SIZE(v2m_pata_resources),
 261         .dev.platform_data = &v2m_pata_data,
 262 };
 263
 264 static unsigned int v2m_mmci_status(struct device *dev)
 265 {
 266         return readl(MMIO_P2V(V2M_SYS_MCI)) & (1 << 0);
 267 }
 268
 269 static struct mmci_platform_data v2m_mmci_data = {
 270         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 271         .status         = v2m_mmci_status,
 272 };
 273
 274 static AMBA_DEVICE(aaci,  "mb:aaci",  V2M_AACI, NULL);
 275 static AMBA_DEVICE(mmci,  "mb:mmci",  V2M_MMCI, &v2m_mmci_data);
 276 static AMBA_DEVICE(kmi0,  "mb:kmi0",  V2M_KMI0, NULL);
 277 static AMBA_DEVICE(kmi1,  "mb:kmi1",  V2M_KMI1, NULL);
 278 static AMBA_DEVICE(uart0, "mb:uart0", V2M_UART0, NULL);
 279 static AMBA_DEVICE(uart1, "mb:uart1", V2M_UART1, NULL);
 280 static AMBA_DEVICE(uart2, "mb:uart2", V2M_UART2, NULL);
 281 static AMBA_DEVICE(uart3, "mb:uart3", V2M_UART3, NULL);
 282 static AMBA_DEVICE(wdt,   "mb:wdt",   V2M_WDT, NULL);
 283 static AMBA_DEVICE(rtc,   "mb:rtc",   V2M_RTC, NULL);
 284
 285 static struct amba_device *v2m_amba_devs[] __initdata = {
 286         &aaci_device,
 287         &mmci_device,
 288         &kmi0_device,
 289         &kmi1_device,
 290         &uart0_device,
 291         &uart1_device,
 292         &uart2_device,
 293         &uart3_device,
 294         &wdt_device,
 295         &rtc_device,
 296 };
 297
 298
 299 static long v2m_osc_round(struct clk *clk, unsigned long rate)
 300 {
 301         return rate;
 302 }
 303
 304 static int v2m_osc1_set(struct clk *clk, unsigned long rate)
 305 {
 306         return v2m_cfg_write(SYS_CFG_OSC | SYS_CFG_SITE_MB | 1, rate);
 307 }
 308
 309 static const struct clk_ops osc1_clk_ops = {
 310         .round  = v2m_osc_round,
 311         .set    = v2m_osc1_set,
 312 };
 313
 314 static struct clk osc1_clk = {
 315         .ops    = &osc1_clk_ops,
 316         .rate   = 24000000,
 317 };
 318
 319 static struct clk osc2_clk = {
 320         .rate   = 24000000,
 321 };
 322
 323 static struct clk v2m_sp804_clk = {
 324         .rate   = 1000000,
 325 };
 326
 327 static struct clk dummy_apb_pclk;
 328
 329 static struct clk_lookup v2m_lookups[] = {
 330         {       /* AMBA bus clock */
 331                 .con_id         = "apb_pclk",
 332                 .clk            = &dummy_apb_pclk,
 333         }, {    /* UART0 */
 334                 .dev_id         = "mb:uart0",
 335                 .clk            = &osc2_clk,
 336         }, {    /* UART1 */
 337                 .dev_id         = "mb:uart1",
 338                 .clk            = &osc2_clk,
 339         }, {    /* UART2 */
 340                 .dev_id         = "mb:uart2",
 341                 .clk            = &osc2_clk,
 342         }, {    /* UART3 */
 343                 .dev_id         = "mb:uart3",
 344                 .clk            = &osc2_clk,
 345         }, {    /* KMI0 */
 346                 .dev_id         = "mb:kmi0",
 347                 .clk            = &osc2_clk,
 348         }, {    /* KMI1 */
 349                 .dev_id         = "mb:kmi1",
 350                 .clk            = &osc2_clk,
 351         }, {    /* MMC0 */
 352                 .dev_id         = "mb:mmci",
 353                 .clk            = &osc2_clk,
 354         }, {    /* CLCD */
 355                 .dev_id         = "mb:clcd",
 356                 .clk            = &osc1_clk,
 357         }, {    /* SP804 timers */
 358                 .dev_id         = "sp804",
 359                 .con_id         = "v2m-timer0",
 360                 .clk            = &v2m_sp804_clk,
 361         }, {    /* SP804 timers */
 362                 .dev_id         = "sp804",
 363                 .con_id         = "v2m-timer1",
 364                 .clk            = &v2m_sp804_clk,
 365         },
 366 };
 367
 368 static void v2m_power_off(void)
 369 {
 370         if (v2m_cfg_write(SYS_CFG_SHUTDOWN | SYS_CFG_SITE_MB, 0))
 371                 printk(KERN_EMERG "Unable to shutdown\n");
 372 }
 373
 374 static void v2m_restart(char str, const char *cmd)
 375 {
 376         if (v2m_cfg_write(SYS_CFG_REBOOT | SYS_CFG_SITE_MB, 0))
 377                 printk(KERN_EMERG "Unable to reboot\n");
 378 }
 379
 380 struct ct_desc *ct_desc;
 381
 382 static struct ct_desc *ct_descs[] __initdata = {
 383 #ifdef CONFIG_ARCH_VEXPRESS_CA9X4
 384         &ct_ca9x4_desc,
 385 #endif
 386 };
 387
 388 static void __init v2m_populate_ct_desc(void)
 389 {
 390         int i;
 391         u32 current_tile_id;
 392
 393         ct_desc = NULL;
 394         current_tile_id = readl(MMIO_P2V(V2M_SYS_PROCID0)) & V2M_CT_ID_MASK;
 395
 396         for (i = 0; i < ARRAY_SIZE(ct_descs) && !ct_desc; ++i)
 397                 if (ct_descs[i]->id == current_tile_id)
 398                         ct_desc = ct_descs[i];
 399
 400         if (!ct_desc)
 401                 panic("vexpress: failed to populate core tile description "
 402                       "for tile ID 0x%8x\n", current_tile_id);
 403 }
 404
 405 static void __init v2m_map_io(void)
 406 {
 407         iotable_init(v2m_io_desc, ARRAY_SIZE(v2m_io_desc));
 408         v2m_populate_ct_desc();
 409         ct_desc->map_io();
 410 }
 411
 412 static void __init v2m_init_irq(void)
 413 {
 414         ct_desc->init_irq();
 415 }
 416
 417 static void __init v2m_init(void)
 418 {
 419         int i;
 420
 421         clkdev_add_table(v2m_lookups, ARRAY_SIZE(v2m_lookups));
 422
 423         platform_device_register(&v2m_pcie_i2c_device);
 424         platform_device_register(&v2m_ddc_i2c_device);
 425         platform_device_register(&v2m_flash_device);
 426         platform_device_register(&v2m_cf_device);
 427         platform_device_register(&v2m_eth_device);
 428         platform_device_register(&v2m_usb_device);
 429
 430         for (i = 0; i < ARRAY_SIZE(v2m_amba_devs); i++)
 431                 amba_device_register(v2m_amba_devs[i], &iomem_resource);
 432
 433         pm_power_off = v2m_power_off;
 434         arm_pm_restart = v2m_restart;
 435
 436         ct_desc->init_tile();
 437 }
 438
 439 MACHINE_START(VEXPRESS, "ARM-Versatile Express")
 440         .boot_params    = PLAT_PHYS_OFFSET + 0x00000100,
 441         .map_io         = v2m_map_io,
 442         .init_early     = v2m_init_early,
 443         .init_irq       = v2m_init_irq,
 444         .timer          = &v2m_timer,
 445         .init_machine   = v2m_init,
 446 MACHINE_END