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