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/sizes.h>
  18 #include <asm/mach/flash.h>
  19 #include <asm/mach/map.h>
  20 #include <asm/mach/time.h>
  21 #include <asm/hardware/arm_timer.h>
  22 #include <asm/hardware/timer-sp.h>
  23 #include <asm/hardware/sp810.h>
  24
  25 #include <mach/motherboard.h>
  26
  27 #include <plat/sched_clock.h>
  28
  29 #include "core.h"
  30
  31 #define V2M_PA_CS0      0x40000000
  32 #define V2M_PA_CS1      0x44000000
  33 #define V2M_PA_CS2      0x48000000
  34 #define V2M_PA_CS3      0x4c000000
  35 #define V2M_PA_CS7      0x10000000
  36
  37 static struct map_desc v2m_io_desc[] __initdata = {
  38         {
  39                 .virtual        = __MMIO_P2V(V2M_PA_CS7),
  40                 .pfn            = __phys_to_pfn(V2M_PA_CS7),
  41                 .length         = SZ_128K,
  42                 .type           = MT_DEVICE,
  43         },
  44 };
  45
  46 void __init v2m_map_io(struct map_desc *tile, size_t num)
  47 {
  48         iotable_init(v2m_io_desc, ARRAY_SIZE(v2m_io_desc));
  49         iotable_init(tile, num);
  50 }
  51
  52 void __init v2m_init_early(void)
  53 {
  54         versatile_sched_clock_init(MMIO_P2V(V2M_SYS_24MHZ), 24000000);
  55 }
  56
  57 static void __init v2m_timer_init(void)
  58 {
  59         u32 scctrl;
  60
  61         /* Select 1MHz TIMCLK as the reference clock for SP804 timers */
  62         scctrl = readl(MMIO_P2V(V2M_SYSCTL + SCCTRL));
  63         scctrl |= SCCTRL_TIMEREN0SEL_TIMCLK;
  64         scctrl |= SCCTRL_TIMEREN1SEL_TIMCLK;
  65         writel(scctrl, MMIO_P2V(V2M_SYSCTL + SCCTRL));
  66
  67         writel(0, MMIO_P2V(V2M_TIMER0) + TIMER_CTRL);
  68         writel(0, MMIO_P2V(V2M_TIMER1) + TIMER_CTRL);
  69
  70         sp804_clocksource_init(MMIO_P2V(V2M_TIMER1));
  71         sp804_clockevents_init(MMIO_P2V(V2M_TIMER0), IRQ_V2M_TIMER0);
  72 }
  73
  74 struct sys_timer v2m_timer = {
  75         .init   = v2m_timer_init,
  76 };
  77
  78
  79 static DEFINE_SPINLOCK(v2m_cfg_lock);
  80
  81 int v2m_cfg_write(u32 devfn, u32 data)
  82 {
  83         /* Configuration interface broken? */
  84         u32 val;
  85
  86         printk("%s: writing %08x to %08x\n", __func__, data, devfn);
  87
  88         devfn |= SYS_CFG_START | SYS_CFG_WRITE;
  89
  90         spin_lock(&v2m_cfg_lock);
  91         val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
  92         writel(val & ~SYS_CFG_COMPLETE, MMIO_P2V(V2M_SYS_CFGSTAT));
  93
  94         writel(data, MMIO_P2V(V2M_SYS_CFGDATA));
  95         writel(devfn, MMIO_P2V(V2M_SYS_CFGCTRL));
  96
  97         do {
  98                 val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
  99         } while (val == 0);
 100         spin_unlock(&v2m_cfg_lock);
 101
 102         return !!(val & SYS_CFG_ERR);
 103 }
 104
 105 int v2m_cfg_read(u32 devfn, u32 *data)
 106 {
 107         u32 val;
 108
 109         devfn |= SYS_CFG_START;
 110
 111         spin_lock(&v2m_cfg_lock);
 112         writel(0, MMIO_P2V(V2M_SYS_CFGSTAT));
 113         writel(devfn, MMIO_P2V(V2M_SYS_CFGCTRL));
 114
 115         mb();
 116
 117         do {
 118                 cpu_relax();
 119                 val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
 120         } while (val == 0);
 121
 122         *data = readl(MMIO_P2V(V2M_SYS_CFGDATA));
 123         spin_unlock(&v2m_cfg_lock);
 124
 125         return !!(val & SYS_CFG_ERR);
 126 }
 127
 128
 129 static struct resource v2m_pcie_i2c_resource = {
 130         .start  = V2M_SERIAL_BUS_PCI,
 131         .end    = V2M_SERIAL_BUS_PCI + SZ_4K - 1,
 132         .flags  = IORESOURCE_MEM,
 133 };
 134
 135 static struct platform_device v2m_pcie_i2c_device = {
 136         .name           = "versatile-i2c",
 137         .id             = 0,
 138         .num_resources  = 1,
 139         .resource       = &v2m_pcie_i2c_resource,
 140 };
 141
 142 static struct resource v2m_ddc_i2c_resource = {
 143         .start  = V2M_SERIAL_BUS_DVI,
 144         .end    = V2M_SERIAL_BUS_DVI + SZ_4K - 1,
 145         .flags  = IORESOURCE_MEM,
 146 };
 147
 148 static struct platform_device v2m_ddc_i2c_device = {
 149         .name           = "versatile-i2c",
 150         .id             = 1,
 151         .num_resources  = 1,
 152         .resource       = &v2m_ddc_i2c_resource,
 153 };
 154
 155 static struct resource v2m_eth_resources[] = {
 156         {
 157                 .start  = V2M_LAN9118,
 158                 .end    = V2M_LAN9118 + SZ_64K - 1,
 159                 .flags  = IORESOURCE_MEM,
 160         }, {
 161                 .start  = IRQ_V2M_LAN9118,
 162                 .end    = IRQ_V2M_LAN9118,
 163                 .flags  = IORESOURCE_IRQ,
 164         },
 165 };
 166
 167 static struct smsc911x_platform_config v2m_eth_config = {
 168         .flags          = SMSC911X_USE_32BIT,
 169         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH,
 170         .irq_type       = SMSC911X_IRQ_TYPE_PUSH_PULL,
 171         .phy_interface  = PHY_INTERFACE_MODE_MII,
 172 };
 173
 174 static struct platform_device v2m_eth_device = {
 175         .name           = "smsc911x",
 176         .id             = -1,
 177         .resource       = v2m_eth_resources,
 178         .num_resources  = ARRAY_SIZE(v2m_eth_resources),
 179         .dev.platform_data = &v2m_eth_config,
 180 };
 181
 182 static struct resource v2m_usb_resources[] = {
 183         {
 184                 .start  = V2M_ISP1761,
 185                 .end    = V2M_ISP1761 + SZ_128K - 1,
 186                 .flags  = IORESOURCE_MEM,
 187         }, {
 188                 .start  = IRQ_V2M_ISP1761,
 189                 .end    = IRQ_V2M_ISP1761,
 190                 .flags  = IORESOURCE_IRQ,
 191         },
 192 };
 193
 194 static struct isp1760_platform_data v2m_usb_config = {
 195         .is_isp1761             = true,
 196         .bus_width_16           = false,
 197         .port1_otg              = true,
 198         .analog_oc              = false,
 199         .dack_polarity_high     = false,
 200         .dreq_polarity_high     = false,
 201 };
 202
 203 static struct platform_device v2m_usb_device = {
 204         .name           = "isp1760",
 205         .id             = -1,
 206         .resource       = v2m_usb_resources,
 207         .num_resources  = ARRAY_SIZE(v2m_usb_resources),
 208         .dev.platform_data = &v2m_usb_config,
 209 };
 210
 211 static int v2m_flash_init(void)
 212 {
 213         writel(0, MMIO_P2V(V2M_SYS_FLASH));
 214         return 0;
 215 }
 216
 217 static void v2m_flash_exit(void)
 218 {
 219         writel(0, MMIO_P2V(V2M_SYS_FLASH));
 220 }
 221
 222 static void v2m_flash_set_vpp(int on)
 223 {
 224         writel(on != 0, MMIO_P2V(V2M_SYS_FLASH));
 225 }
 226
 227 static struct flash_platform_data v2m_flash_data = {
 228         .map_name       = "cfi_probe",
 229         .width          = 4,
 230         .init           = v2m_flash_init,
 231         .exit           = v2m_flash_exit,
 232         .set_vpp        = v2m_flash_set_vpp,
 233 };
 234
 235 static struct resource v2m_flash_resources[] = {
 236         {
 237                 .start  = V2M_NOR0,
 238                 .end    = V2M_NOR0 + SZ_64M - 1,
 239                 .flags  = IORESOURCE_MEM,
 240         }, {
 241                 .start  = V2M_NOR1,
 242                 .end    = V2M_NOR1 + SZ_64M - 1,
 243                 .flags  = IORESOURCE_MEM,
 244         },
 245 };
 246
 247 static struct platform_device v2m_flash_device = {
 248         .name           = "armflash",
 249         .id             = -1,
 250         .resource       = v2m_flash_resources,
 251         .num_resources  = ARRAY_SIZE(v2m_flash_resources),
 252         .dev.platform_data = &v2m_flash_data,
 253 };
 254
 255 static struct pata_platform_info v2m_pata_data = {
 256         .ioport_shift   = 2,
 257 };
 258
 259 static struct resource v2m_pata_resources[] = {
 260         {
 261                 .start  = V2M_CF,
 262                 .end    = V2M_CF + 0xff,
 263                 .flags  = IORESOURCE_MEM,
 264         }, {
 265                 .start  = V2M_CF + 0x100,
 266                 .end    = V2M_CF + SZ_4K - 1,
 267                 .flags  = IORESOURCE_MEM,
 268         },
 269 };
 270
 271 static struct platform_device v2m_cf_device = {
 272         .name           = "pata_platform",
 273         .id             = -1,
 274         .resource       = v2m_pata_resources,
 275         .num_resources  = ARRAY_SIZE(v2m_pata_resources),
 276         .dev.platform_data = &v2m_pata_data,
 277 };
 278
 279 static unsigned int v2m_mmci_status(struct device *dev)
 280 {
 281         return readl(MMIO_P2V(V2M_SYS_MCI)) & (1 << 0);
 282 }
 283
 284 static struct mmci_platform_data v2m_mmci_data = {
 285         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 286         .status         = v2m_mmci_status,
 287 };
 288
 289 static AMBA_DEVICE(aaci,  "mb:aaci",  V2M_AACI, NULL);
 290 static AMBA_DEVICE(mmci,  "mb:mmci",  V2M_MMCI, &v2m_mmci_data);
 291 static AMBA_DEVICE(kmi0,  "mb:kmi0",  V2M_KMI0, NULL);
 292 static AMBA_DEVICE(kmi1,  "mb:kmi1",  V2M_KMI1, NULL);
 293 static AMBA_DEVICE(uart0, "mb:uart0", V2M_UART0, NULL);
 294 static AMBA_DEVICE(uart1, "mb:uart1", V2M_UART1, NULL);
 295 static AMBA_DEVICE(uart2, "mb:uart2", V2M_UART2, NULL);
 296 static AMBA_DEVICE(uart3, "mb:uart3", V2M_UART3, NULL);
 297 static AMBA_DEVICE(wdt,   "mb:wdt",   V2M_WDT, NULL);
 298 static AMBA_DEVICE(rtc,   "mb:rtc",   V2M_RTC, NULL);
 299
 300 static struct amba_device *v2m_amba_devs[] __initdata = {
 301         &aaci_device,
 302         &mmci_device,
 303         &kmi0_device,
 304         &kmi1_device,
 305         &uart0_device,
 306         &uart1_device,
 307         &uart2_device,
 308         &uart3_device,
 309         &wdt_device,
 310         &rtc_device,
 311 };
 312
 313
 314 static long v2m_osc_round(struct clk *clk, unsigned long rate)
 315 {
 316         return rate;
 317 }
 318
 319 static int v2m_osc1_set(struct clk *clk, unsigned long rate)
 320 {
 321         return v2m_cfg_write(SYS_CFG_OSC | SYS_CFG_SITE_MB | 1, rate);
 322 }
 323
 324 static const struct clk_ops osc1_clk_ops = {
 325         .round  = v2m_osc_round,
 326         .set    = v2m_osc1_set,
 327 };
 328
 329 static struct clk osc1_clk = {
 330         .ops    = &osc1_clk_ops,
 331         .rate   = 24000000,
 332 };
 333
 334 static struct clk osc2_clk = {
 335         .rate   = 24000000,
 336 };
 337
 338 static struct clk dummy_apb_pclk;
 339
 340 static struct clk_lookup v2m_lookups[] = {
 341         {       /* AMBA bus clock */
 342                 .con_id         = "apb_pclk",
 343                 .clk            = &dummy_apb_pclk,
 344         }, {    /* UART0 */
 345                 .dev_id         = "mb:uart0",
 346                 .clk            = &osc2_clk,
 347         }, {    /* UART1 */
 348                 .dev_id         = "mb:uart1",
 349                 .clk            = &osc2_clk,
 350         }, {    /* UART2 */
 351                 .dev_id         = "mb:uart2",
 352                 .clk            = &osc2_clk,
 353         }, {    /* UART3 */
 354                 .dev_id         = "mb:uart3",
 355                 .clk            = &osc2_clk,
 356         }, {    /* KMI0 */
 357                 .dev_id         = "mb:kmi0",
 358                 .clk            = &osc2_clk,
 359         }, {    /* KMI1 */
 360                 .dev_id         = "mb:kmi1",
 361                 .clk            = &osc2_clk,
 362         }, {    /* MMC0 */
 363                 .dev_id         = "mb:mmci",
 364                 .clk            = &osc2_clk,
 365         }, {    /* CLCD */
 366                 .dev_id         = "mb:clcd",
 367                 .clk            = &osc1_clk,
 368         },
 369 };
 370
 371 static void v2m_power_off(void)
 372 {
 373         if (v2m_cfg_write(SYS_CFG_SHUTDOWN | SYS_CFG_SITE_MB, 0))
 374                 printk(KERN_EMERG "Unable to shutdown\n");
 375 }
 376
 377 static void v2m_restart(char str, const char *cmd)
 378 {
 379         if (v2m_cfg_write(SYS_CFG_REBOOT | SYS_CFG_SITE_MB, 0))
 380                 printk(KERN_EMERG "Unable to reboot\n");
 381 }
 382
 383 static int __init v2m_init(void)
 384 {
 385         int i;
 386
 387         clkdev_add_table(v2m_lookups, ARRAY_SIZE(v2m_lookups));
 388
 389         platform_device_register(&v2m_pcie_i2c_device);
 390         platform_device_register(&v2m_ddc_i2c_device);
 391         platform_device_register(&v2m_flash_device);
 392         platform_device_register(&v2m_cf_device);
 393         platform_device_register(&v2m_eth_device);
 394         platform_device_register(&v2m_usb_device);
 395
 396         for (i = 0; i < ARRAY_SIZE(v2m_amba_devs); i++)
 397                 amba_device_register(v2m_amba_devs[i], &iomem_resource);
 398
 399         pm_power_off = v2m_power_off;
 400         arm_pm_restart = v2m_restart;
 401
 402         return 0;
 403 }
 404 arch_initcall(v2m_init);