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