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