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/smsc911x.h>
  11 #include <linux/spinlock.h>
  12 #include <linux/sysdev.h>
  13 #include <linux/usb/isp1760.h>
  14 #include <linux/clkdev.h>
  15
  16 #include <asm/sizes.h>
  17 #include <asm/mach/flash.h>
  18 #include <asm/mach/map.h>
  19 #include <asm/mach/time.h>
  20 #include <asm/hardware/arm_timer.h>
  21 #include <asm/hardware/timer-sp.h>
  22 #include <asm/hardware/sp810.h>
  23
  24 #include <mach/motherboard.h>
  25
  26 #include <plat/sched_clock.h>
  27
  28 #include "core.h"
  29
  30 #define V2M_PA_CS0      0x40000000
  31 #define V2M_PA_CS1      0x44000000
  32 #define V2M_PA_CS2      0x48000000
  33 #define V2M_PA_CS3      0x4c000000
  34 #define V2M_PA_CS7      0x10000000
  35
  36 static struct map_desc v2m_io_desc[] __initdata = {
  37         {
  38                 .virtual        = __MMIO_P2V(V2M_PA_CS7),
  39                 .pfn            = __phys_to_pfn(V2M_PA_CS7),
  40                 .length         = SZ_128K,
  41                 .type           = MT_DEVICE,
  42         },
  43 };
  44
  45 void __init v2m_map_io(struct map_desc *tile, size_t num)
  46 {
  47         iotable_init(v2m_io_desc, ARRAY_SIZE(v2m_io_desc));
  48         iotable_init(tile, num);
  49 }
  50
  51
  52 static void __init v2m_timer_init(void)
  53 {
  54         u32 scctrl;
  55
  56         versatile_sched_clock_init(MMIO_P2V(V2M_SYS_24MHZ), 24000000);
  57
  58         /* Select 1MHz TIMCLK as the reference clock for SP804 timers */
  59         scctrl = readl(MMIO_P2V(V2M_SYSCTL + SCCTRL));
  60         scctrl |= SCCTRL_TIMEREN0SEL_TIMCLK;
  61         scctrl |= SCCTRL_TIMEREN1SEL_TIMCLK;
  62         writel(scctrl, MMIO_P2V(V2M_SYSCTL + SCCTRL));
  63
  64         writel(0, MMIO_P2V(V2M_TIMER0) + TIMER_CTRL);
  65         writel(0, MMIO_P2V(V2M_TIMER1) + TIMER_CTRL);
  66
  67         sp804_clocksource_init(MMIO_P2V(V2M_TIMER1));
  68         sp804_clockevents_init(MMIO_P2V(V2M_TIMER0), IRQ_V2M_TIMER0);
  69 }
  70
  71 struct sys_timer v2m_timer = {
  72         .init   = v2m_timer_init,
  73 };
  74
  75
  76 static DEFINE_SPINLOCK(v2m_cfg_lock);
  77
  78 int v2m_cfg_write(u32 devfn, u32 data)
  79 {
  80         /* Configuration interface broken? */
  81         u32 val;
  82
  83         printk("%s: writing %08x to %08x\n", __func__, data, devfn);
  84
  85         devfn |= SYS_CFG_START | SYS_CFG_WRITE;
  86
  87         spin_lock(&v2m_cfg_lock);
  88         val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
  89         writel(val & ~SYS_CFG_COMPLETE, MMIO_P2V(V2M_SYS_CFGSTAT));
  90
  91         writel(data, MMIO_P2V(V2M_SYS_CFGDATA));
  92         writel(devfn, MMIO_P2V(V2M_SYS_CFGCTRL));
  93
  94         do {
  95                 val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
  96         } while (val == 0);
  97         spin_unlock(&v2m_cfg_lock);
  98
  99         return !!(val & SYS_CFG_ERR);
 100 }
 101
 102 int v2m_cfg_read(u32 devfn, u32 *data)
 103 {
 104         u32 val;
 105
 106         devfn |= SYS_CFG_START;
 107
 108         spin_lock(&v2m_cfg_lock);
 109         writel(0, MMIO_P2V(V2M_SYS_CFGSTAT));
 110         writel(devfn, MMIO_P2V(V2M_SYS_CFGCTRL));
 111
 112         mb();
 113
 114         do {
 115                 cpu_relax();
 116                 val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
 117         } while (val == 0);
 118
 119         *data = readl(MMIO_P2V(V2M_SYS_CFGDATA));
 120         spin_unlock(&v2m_cfg_lock);
 121
 122         return !!(val & SYS_CFG_ERR);
 123 }
 124
 125
 126 static struct resource v2m_pcie_i2c_resource = {
 127         .start  = V2M_SERIAL_BUS_PCI,
 128         .end    = V2M_SERIAL_BUS_PCI + SZ_4K - 1,
 129         .flags  = IORESOURCE_MEM,
 130 };
 131
 132 static struct platform_device v2m_pcie_i2c_device = {
 133         .name           = "versatile-i2c",
 134         .id             = 0,
 135         .num_resources  = 1,
 136         .resource       = &v2m_pcie_i2c_resource,
 137 };
 138
 139 static struct resource v2m_ddc_i2c_resource = {
 140         .start  = V2M_SERIAL_BUS_DVI,
 141         .end    = V2M_SERIAL_BUS_DVI + SZ_4K - 1,
 142         .flags  = IORESOURCE_MEM,
 143 };
 144
 145 static struct platform_device v2m_ddc_i2c_device = {
 146         .name           = "versatile-i2c",
 147         .id             = 1,
 148         .num_resources  = 1,
 149         .resource       = &v2m_ddc_i2c_resource,
 150 };
 151
 152 static struct resource v2m_eth_resources[] = {
 153         {
 154                 .start  = V2M_LAN9118,
 155                 .end    = V2M_LAN9118 + SZ_64K - 1,
 156                 .flags  = IORESOURCE_MEM,
 157         }, {
 158                 .start  = IRQ_V2M_LAN9118,
 159                 .end    = IRQ_V2M_LAN9118,
 160                 .flags  = IORESOURCE_IRQ,
 161         },
 162 };
 163
 164 static struct smsc911x_platform_config v2m_eth_config = {
 165         .flags          = SMSC911X_USE_32BIT,
 166         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH,
 167         .irq_type       = SMSC911X_IRQ_TYPE_PUSH_PULL,
 168         .phy_interface  = PHY_INTERFACE_MODE_MII,
 169 };
 170
 171 static struct platform_device v2m_eth_device = {
 172         .name           = "smsc911x",
 173         .id             = -1,
 174         .resource       = v2m_eth_resources,
 175         .num_resources  = ARRAY_SIZE(v2m_eth_resources),
 176         .dev.platform_data = &v2m_eth_config,
 177 };
 178
 179 static struct resource v2m_usb_resources[] = {
 180         {
 181                 .start  = V2M_ISP1761,
 182                 .end    = V2M_ISP1761 + SZ_128K - 1,
 183                 .flags  = IORESOURCE_MEM,
 184         }, {
 185                 .start  = IRQ_V2M_ISP1761,
 186                 .end    = IRQ_V2M_ISP1761,
 187                 .flags  = IORESOURCE_IRQ,
 188         },
 189 };
 190
 191 static struct isp1760_platform_data v2m_usb_config = {
 192         .is_isp1761             = true,
 193         .bus_width_16           = false,
 194         .port1_otg              = true,
 195         .analog_oc              = false,
 196         .dack_polarity_high     = false,
 197         .dreq_polarity_high     = false,
 198 };
 199
 200 static struct platform_device v2m_usb_device = {
 201         .name           = "isp1760",
 202         .id             = -1,
 203         .resource       = v2m_usb_resources,
 204         .num_resources  = ARRAY_SIZE(v2m_usb_resources),
 205         .dev.platform_data = &v2m_usb_config,
 206 };
 207
 208 static int v2m_flash_init(void)
 209 {
 210         writel(0, MMIO_P2V(V2M_SYS_FLASH));
 211         return 0;
 212 }
 213
 214 static void v2m_flash_exit(void)
 215 {
 216         writel(0, MMIO_P2V(V2M_SYS_FLASH));
 217 }
 218
 219 static void v2m_flash_set_vpp(int on)
 220 {
 221         writel(on != 0, MMIO_P2V(V2M_SYS_FLASH));
 222 }
 223
 224 static struct flash_platform_data v2m_flash_data = {
 225         .map_name       = "cfi_probe",
 226         .width          = 4,
 227         .init           = v2m_flash_init,
 228         .exit           = v2m_flash_exit,
 229         .set_vpp        = v2m_flash_set_vpp,
 230 };
 231
 232 static struct resource v2m_flash_resources[] = {
 233         {
 234                 .start  = V2M_NOR0,
 235                 .end    = V2M_NOR0 + SZ_64M - 1,
 236                 .flags  = IORESOURCE_MEM,
 237         }, {
 238                 .start  = V2M_NOR1,
 239                 .end    = V2M_NOR1 + SZ_64M - 1,
 240                 .flags  = IORESOURCE_MEM,
 241         },
 242 };
 243
 244 static struct platform_device v2m_flash_device = {
 245         .name           = "armflash",
 246         .id             = -1,
 247         .resource       = v2m_flash_resources,
 248         .num_resources  = ARRAY_SIZE(v2m_flash_resources),
 249         .dev.platform_data = &v2m_flash_data,
 250 };
 251
 252
 253 static unsigned int v2m_mmci_status(struct device *dev)
 254 {
 255         return readl(MMIO_P2V(V2M_SYS_MCI)) & (1 << 0);
 256 }
 257
 258 static struct mmci_platform_data v2m_mmci_data = {
 259         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 260         .status         = v2m_mmci_status,
 261 };
 262
 263 static AMBA_DEVICE(aaci,  "mb:aaci",  V2M_AACI, NULL);
 264 static AMBA_DEVICE(mmci,  "mb:mmci",  V2M_MMCI, &v2m_mmci_data);
 265 static AMBA_DEVICE(kmi0,  "mb:kmi0",  V2M_KMI0, NULL);
 266 static AMBA_DEVICE(kmi1,  "mb:kmi1",  V2M_KMI1, NULL);
 267 static AMBA_DEVICE(uart0, "mb:uart0", V2M_UART0, NULL);
 268 static AMBA_DEVICE(uart1, "mb:uart1", V2M_UART1, NULL);
 269 static AMBA_DEVICE(uart2, "mb:uart2", V2M_UART2, NULL);
 270 static AMBA_DEVICE(uart3, "mb:uart3", V2M_UART3, NULL);
 271 static AMBA_DEVICE(wdt,   "mb:wdt",   V2M_WDT, NULL);
 272 static AMBA_DEVICE(rtc,   "mb:rtc",   V2M_RTC, NULL);
 273
 274 static struct amba_device *v2m_amba_devs[] __initdata = {
 275         &aaci_device,
 276         &mmci_device,
 277         &kmi0_device,
 278         &kmi1_device,
 279         &uart0_device,
 280         &uart1_device,
 281         &uart2_device,
 282         &uart3_device,
 283         &wdt_device,
 284         &rtc_device,
 285 };
 286
 287
 288 static long v2m_osc_round(struct clk *clk, unsigned long rate)
 289 {
 290         return rate;
 291 }
 292
 293 static int v2m_osc1_set(struct clk *clk, unsigned long rate)
 294 {
 295         return v2m_cfg_write(SYS_CFG_OSC | SYS_CFG_SITE_MB | 1, rate);
 296 }
 297
 298 static const struct clk_ops osc1_clk_ops = {
 299         .round  = v2m_osc_round,
 300         .set    = v2m_osc1_set,
 301 };
 302
 303 static struct clk osc1_clk = {
 304         .ops    = &osc1_clk_ops,
 305         .rate   = 24000000,
 306 };
 307
 308 static struct clk osc2_clk = {
 309         .rate   = 24000000,
 310 };
 311
 312 static struct clk dummy_apb_pclk;
 313
 314 static struct clk_lookup v2m_lookups[] = {
 315         {       /* AMBA bus clock */
 316                 .con_id         = "apb_pclk",
 317                 .clk            = &dummy_apb_pclk,
 318         }, {    /* UART0 */
 319                 .dev_id         = "mb:uart0",
 320                 .clk            = &osc2_clk,
 321         }, {    /* UART1 */
 322                 .dev_id         = "mb:uart1",
 323                 .clk            = &osc2_clk,
 324         }, {    /* UART2 */
 325                 .dev_id         = "mb:uart2",
 326                 .clk            = &osc2_clk,
 327         }, {    /* UART3 */
 328                 .dev_id         = "mb:uart3",
 329                 .clk            = &osc2_clk,
 330         }, {    /* KMI0 */
 331                 .dev_id         = "mb:kmi0",
 332                 .clk            = &osc2_clk,
 333         }, {    /* KMI1 */
 334                 .dev_id         = "mb:kmi1",
 335                 .clk            = &osc2_clk,
 336         }, {    /* MMC0 */
 337                 .dev_id         = "mb:mmci",
 338                 .clk            = &osc2_clk,
 339         }, {    /* CLCD */
 340                 .dev_id         = "mb:clcd",
 341                 .clk            = &osc1_clk,
 342         },
 343 };
 344
 345 static void v2m_power_off(void)
 346 {
 347         if (v2m_cfg_write(SYS_CFG_SHUTDOWN | SYS_CFG_SITE_MB, 0))
 348                 printk(KERN_EMERG "Unable to shutdown\n");
 349 }
 350
 351 static void v2m_restart(char str, const char *cmd)
 352 {
 353         if (v2m_cfg_write(SYS_CFG_REBOOT | SYS_CFG_SITE_MB, 0))
 354                 printk(KERN_EMERG "Unable to reboot\n");
 355 }
 356
 357 static int __init v2m_init(void)
 358 {
 359         int i;
 360
 361         clkdev_add_table(v2m_lookups, ARRAY_SIZE(v2m_lookups));
 362
 363         platform_device_register(&v2m_pcie_i2c_device);
 364         platform_device_register(&v2m_ddc_i2c_device);
 365         platform_device_register(&v2m_flash_device);
 366         platform_device_register(&v2m_eth_device);
 367         platform_device_register(&v2m_usb_device);
 368
 369         for (i = 0; i < ARRAY_SIZE(v2m_amba_devs); i++)
 370                 amba_device_register(v2m_amba_devs[i], &iomem_resource);
 371
 372         pm_power_off = v2m_power_off;
 373         arm_pm_restart = v2m_restart;
 374
 375         return 0;
 376 }
 377 arch_initcall(v2m_init);