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