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