kernel/arch/arm/mach-realview/realview_eb.c

   1 /*
   2  *  linux/arch/arm/mach-realview/realview_eb.c
   3  *
   4  *  Copyright (C) 2004 ARM Limited
   5  *  Copyright (C) 2000 Deep Blue Solutions Ltd
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <linux/init.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/device.h>
  25 #include <linux/amba/bus.h>
  26 #include <linux/amba/pl061.h>
  27 #include <linux/amba/mmci.h>
  28 #include <linux/amba/pl022.h>
  29 #include <linux/io.h>
  30 #include <linux/irqchip/arm-gic.h>
  31 #include <linux/platform_data/clk-realview.h>
  32 #include <linux/reboot.h>
  33
  34 #include <mach/hardware.h>
  35 #include <asm/irq.h>
  36 #include <asm/mach-types.h>
  37 #include <asm/pgtable.h>
  38 #include <asm/hardware/cache-l2x0.h>
  39 #include <asm/smp_twd.h>
  40 #include <asm/system_info.h>
  41
  42 #include <asm/mach/arch.h>
  43 #include <asm/mach/map.h>
  44 #include <asm/mach/time.h>
  45
  46 #include <mach/board-eb.h>
  47 #include <mach/irqs.h>
  48
  49 #include "core.h"
  50
  51 static struct map_desc realview_eb_io_desc[] __initdata = {
  52         {
  53                 .virtual        = IO_ADDRESS(REALVIEW_SYS_BASE),
  54                 .pfn            = __phys_to_pfn(REALVIEW_SYS_BASE),
  55                 .length         = SZ_4K,
  56                 .type           = MT_DEVICE,
  57         }, {
  58                 .virtual        = IO_ADDRESS(REALVIEW_EB_GIC_CPU_BASE),
  59                 .pfn            = __phys_to_pfn(REALVIEW_EB_GIC_CPU_BASE),
  60                 .length         = SZ_4K,
  61                 .type           = MT_DEVICE,
  62         }, {
  63                 .virtual        = IO_ADDRESS(REALVIEW_EB_GIC_DIST_BASE),
  64                 .pfn            = __phys_to_pfn(REALVIEW_EB_GIC_DIST_BASE),
  65                 .length         = SZ_4K,
  66                 .type           = MT_DEVICE,
  67         }, {
  68                 .virtual        = IO_ADDRESS(REALVIEW_SCTL_BASE),
  69                 .pfn            = __phys_to_pfn(REALVIEW_SCTL_BASE),
  70                 .length         = SZ_4K,
  71                 .type           = MT_DEVICE,
  72         }, {
  73                 .virtual        = IO_ADDRESS(REALVIEW_EB_TIMER0_1_BASE),
  74                 .pfn            = __phys_to_pfn(REALVIEW_EB_TIMER0_1_BASE),
  75                 .length         = SZ_4K,
  76                 .type           = MT_DEVICE,
  77         }, {
  78                 .virtual        = IO_ADDRESS(REALVIEW_EB_TIMER2_3_BASE),
  79                 .pfn            = __phys_to_pfn(REALVIEW_EB_TIMER2_3_BASE),
  80                 .length         = SZ_4K,
  81                 .type           = MT_DEVICE,
  82         },
  83 #ifdef CONFIG_DEBUG_LL
  84         {
  85                 .virtual        = IO_ADDRESS(REALVIEW_EB_UART0_BASE),
  86                 .pfn            = __phys_to_pfn(REALVIEW_EB_UART0_BASE),
  87                 .length         = SZ_4K,
  88                 .type           = MT_DEVICE,
  89         }
  90 #endif
  91 };
  92
  93 static struct map_desc realview_eb11mp_io_desc[] __initdata = {
  94         {
  95                 .virtual        = IO_ADDRESS(REALVIEW_EB11MP_PRIV_MEM_BASE),
  96                 .pfn            = __phys_to_pfn(REALVIEW_EB11MP_PRIV_MEM_BASE),
  97                 .length         = REALVIEW_EB11MP_PRIV_MEM_SIZE,
  98                 .type           = MT_DEVICE,
  99         }, {
 100                 .virtual        = IO_ADDRESS(REALVIEW_EB11MP_L220_BASE),
 101                 .pfn            = __phys_to_pfn(REALVIEW_EB11MP_L220_BASE),
 102                 .length         = SZ_8K,
 103                 .type           = MT_DEVICE,
 104         }
 105 };
 106
 107 static void __init realview_eb_map_io(void)
 108 {
 109         iotable_init(realview_eb_io_desc, ARRAY_SIZE(realview_eb_io_desc));
 110         if (core_tile_eb11mp() || core_tile_a9mp())
 111                 iotable_init(realview_eb11mp_io_desc, ARRAY_SIZE(realview_eb11mp_io_desc));
 112 }
 113
 114 static struct pl061_platform_data gpio0_plat_data = {
 115         .gpio_base      = 0,
 116 };
 117
 118 static struct pl061_platform_data gpio1_plat_data = {
 119         .gpio_base      = 8,
 120 };
 121
 122 static struct pl061_platform_data gpio2_plat_data = {
 123         .gpio_base      = 16,
 124 };
 125
 126 static struct pl022_ssp_controller ssp0_plat_data = {
 127         .bus_id = 0,
 128         .enable_dma = 0,
 129         .num_chipselect = 1,
 130 };
 131
 132 /*
 133  * RealView EB AMBA devices
 134  */
 135
 136 /*
 137  * These devices are connected via the core APB bridge
 138  */
 139 #define GPIO2_IRQ       { IRQ_EB_GPIO2 }
 140 #define GPIO3_IRQ       { IRQ_EB_GPIO3 }
 141
 142 #define AACI_IRQ        { IRQ_EB_AACI }
 143 #define MMCI0_IRQ       { IRQ_EB_MMCI0A, IRQ_EB_MMCI0B }
 144 #define KMI0_IRQ        { IRQ_EB_KMI0 }
 145 #define KMI1_IRQ        { IRQ_EB_KMI1 }
 146
 147 /*
 148  * These devices are connected directly to the multi-layer AHB switch
 149  */
 150 #define EB_SMC_IRQ      { }
 151 #define MPMC_IRQ        { }
 152 #define EB_CLCD_IRQ     { IRQ_EB_CLCD }
 153 #define DMAC_IRQ        { IRQ_EB_DMA }
 154
 155 /*
 156  * These devices are connected via the core APB bridge
 157  */
 158 #define SCTL_IRQ        { }
 159 #define EB_WATCHDOG_IRQ { IRQ_EB_WDOG }
 160 #define EB_GPIO0_IRQ    { IRQ_EB_GPIO0 }
 161 #define GPIO1_IRQ       { IRQ_EB_GPIO1 }
 162 #define EB_RTC_IRQ      { IRQ_EB_RTC }
 163
 164 /*
 165  * These devices are connected via the DMA APB bridge
 166  */
 167 #define SCI_IRQ         { IRQ_EB_SCI }
 168 #define EB_UART0_IRQ    { IRQ_EB_UART0 }
 169 #define EB_UART1_IRQ    { IRQ_EB_UART1 }
 170 #define EB_UART2_IRQ    { IRQ_EB_UART2 }
 171 #define EB_UART3_IRQ    { IRQ_EB_UART3 }
 172 #define EB_SSP_IRQ      { IRQ_EB_SSP }
 173
 174 /* FPGA Primecells */
 175 APB_DEVICE(aaci,  "fpga:aaci",  AACI,     NULL);
 176 APB_DEVICE(mmc0,  "fpga:mmc0",  MMCI0,    &realview_mmc0_plat_data);
 177 APB_DEVICE(kmi0,  "fpga:kmi0",  KMI0,     NULL);
 178 APB_DEVICE(kmi1,  "fpga:kmi1",  KMI1,     NULL);
 179 APB_DEVICE(uart3, "fpga:uart3", EB_UART3, NULL);
 180
 181 /* DevChip Primecells */
 182 AHB_DEVICE(smc,   "dev:smc",   EB_SMC,   NULL);
 183 AHB_DEVICE(clcd,  "dev:clcd",  EB_CLCD,  &clcd_plat_data);
 184 AHB_DEVICE(dmac,  "dev:dmac",  DMAC,     NULL);
 185 AHB_DEVICE(sctl,  "dev:sctl",  SCTL,     NULL);
 186 APB_DEVICE(wdog,  "dev:wdog",  EB_WATCHDOG, NULL);
 187 APB_DEVICE(gpio0, "dev:gpio0", EB_GPIO0, &gpio0_plat_data);
 188 APB_DEVICE(gpio1, "dev:gpio1", GPIO1,    &gpio1_plat_data);
 189 APB_DEVICE(gpio2, "dev:gpio2", GPIO2,    &gpio2_plat_data);
 190 APB_DEVICE(rtc,   "dev:rtc",   EB_RTC,   NULL);
 191 APB_DEVICE(sci0,  "dev:sci0",  SCI,      NULL);
 192 APB_DEVICE(uart0, "dev:uart0", EB_UART0, NULL);
 193 APB_DEVICE(uart1, "dev:uart1", EB_UART1, NULL);
 194 APB_DEVICE(uart2, "dev:uart2", EB_UART2, NULL);
 195 APB_DEVICE(ssp0,  "dev:ssp0",  EB_SSP,   &ssp0_plat_data);
 196
 197 static struct amba_device *amba_devs[] __initdata = {
 198         &dmac_device,
 199         &uart0_device,
 200         &uart1_device,
 201         &uart2_device,
 202         &uart3_device,
 203         &smc_device,
 204         &clcd_device,
 205         &sctl_device,
 206         &wdog_device,
 207         &gpio0_device,
 208         &gpio1_device,
 209         &gpio2_device,
 210         &rtc_device,
 211         &sci0_device,
 212         &ssp0_device,
 213         &aaci_device,
 214         &mmc0_device,
 215         &kmi0_device,
 216         &kmi1_device,
 217 };
 218
 219 /*
 220  * RealView EB platform devices
 221  */
 222 static struct resource realview_eb_flash_resource = {
 223         .start                  = REALVIEW_EB_FLASH_BASE,
 224         .end                    = REALVIEW_EB_FLASH_BASE + REALVIEW_EB_FLASH_SIZE - 1,
 225         .flags                  = IORESOURCE_MEM,
 226 };
 227
 228 static struct resource realview_eb_eth_resources[] = {
 229         [0] = {
 230                 .start          = REALVIEW_EB_ETH_BASE,
 231                 .end            = REALVIEW_EB_ETH_BASE + SZ_64K - 1,
 232                 .flags          = IORESOURCE_MEM,
 233         },
 234         [1] = {
 235                 .start          = IRQ_EB_ETH,
 236                 .end            = IRQ_EB_ETH,
 237                 .flags          = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 238         },
 239 };
 240
 241 /*
 242  * Detect and register the correct Ethernet device. RealView/EB rev D
 243  * platforms use the newer SMSC LAN9118 Ethernet chip
 244  */
 245 static int eth_device_register(void)
 246 {
 247         void __iomem *eth_addr = ioremap(REALVIEW_EB_ETH_BASE, SZ_4K);
 248         const char *name = NULL;
 249         u32 idrev;
 250
 251         if (!eth_addr)
 252                 return -ENOMEM;
 253
 254         idrev = readl(eth_addr + 0x50);
 255         if ((idrev & 0xFFFF0000) != 0x01180000)
 256                 /* SMSC LAN9118 not present, use LAN91C111 instead */
 257                 name = "smc91x";
 258
 259         iounmap(eth_addr);
 260         return realview_eth_register(name, realview_eb_eth_resources);
 261 }
 262
 263 static struct resource realview_eb_isp1761_resources[] = {
 264         [0] = {
 265                 .start          = REALVIEW_EB_USB_BASE,
 266                 .end            = REALVIEW_EB_USB_BASE + SZ_128K - 1,
 267                 .flags          = IORESOURCE_MEM,
 268         },
 269         [1] = {
 270                 .start          = IRQ_EB_USB,
 271                 .end            = IRQ_EB_USB,
 272                 .flags          = IORESOURCE_IRQ,
 273         },
 274 };
 275
 276 static struct resource pmu_resources[] = {
 277         [0] = {
 278                 .start          = IRQ_EB11MP_PMU_CPU0,
 279                 .end            = IRQ_EB11MP_PMU_CPU0,
 280                 .flags          = IORESOURCE_IRQ,
 281         },
 282         [1] = {
 283                 .start          = IRQ_EB11MP_PMU_CPU1,
 284                 .end            = IRQ_EB11MP_PMU_CPU1,
 285                 .flags          = IORESOURCE_IRQ,
 286         },
 287         [2] = {
 288                 .start          = IRQ_EB11MP_PMU_CPU2,
 289                 .end            = IRQ_EB11MP_PMU_CPU2,
 290                 .flags          = IORESOURCE_IRQ,
 291         },
 292         [3] = {
 293                 .start          = IRQ_EB11MP_PMU_CPU3,
 294                 .end            = IRQ_EB11MP_PMU_CPU3,
 295                 .flags          = IORESOURCE_IRQ,
 296         },
 297 };
 298
 299 static struct platform_device pmu_device = {
 300         .id                     = -1,
 301         .num_resources          = ARRAY_SIZE(pmu_resources),
 302         .resource               = pmu_resources,
 303 };
 304
 305 static struct resource char_lcd_resources[] = {
 306         {
 307                 .start = REALVIEW_CHAR_LCD_BASE,
 308                 .end   = (REALVIEW_CHAR_LCD_BASE + SZ_4K - 1),
 309                 .flags = IORESOURCE_MEM,
 310         },
 311         {
 312                 .start  = IRQ_EB_CHARLCD,
 313                 .end    = IRQ_EB_CHARLCD,
 314                 .flags  = IORESOURCE_IRQ,
 315         },
 316 };
 317
 318 static struct platform_device char_lcd_device = {
 319         .name           =       "arm-charlcd",
 320         .id             =       -1,
 321         .num_resources  =       ARRAY_SIZE(char_lcd_resources),
 322         .resource       =       char_lcd_resources,
 323 };
 324
 325 static void __init gic_init_irq(void)
 326 {
 327         if (core_tile_eb11mp() || core_tile_a9mp()) {
 328                 unsigned int pldctrl;
 329
 330                 /* new irq mode */
 331                 writel(0x0000a05f, __io_address(REALVIEW_SYS_LOCK));
 332                 pldctrl = readl(__io_address(REALVIEW_SYS_BASE) + REALVIEW_EB11MP_SYS_PLD_CTRL1);
 333                 pldctrl |= 0x00800000;
 334                 writel(pldctrl, __io_address(REALVIEW_SYS_BASE) + REALVIEW_EB11MP_SYS_PLD_CTRL1);
 335                 writel(0x00000000, __io_address(REALVIEW_SYS_LOCK));
 336
 337                 /* core tile GIC, primary */
 338                 gic_init(0, 29, __io_address(REALVIEW_EB11MP_GIC_DIST_BASE),
 339                          __io_address(REALVIEW_EB11MP_GIC_CPU_BASE));
 340
 341 #ifndef CONFIG_REALVIEW_EB_ARM11MP_REVB
 342                 /* board GIC, secondary */
 343                 gic_init(1, 96, __io_address(REALVIEW_EB_GIC_DIST_BASE),
 344                          __io_address(REALVIEW_EB_GIC_CPU_BASE));
 345                 gic_cascade_irq(1, IRQ_EB11MP_EB_IRQ1);
 346 #endif
 347         } else {
 348                 /* board GIC, primary */
 349                 gic_init(0, 29, __io_address(REALVIEW_EB_GIC_DIST_BASE),
 350                          __io_address(REALVIEW_EB_GIC_CPU_BASE));
 351         }
 352 }
 353
 354 /*
 355  * Fix up the IRQ numbers for the RealView EB/ARM11MPCore tile
 356  */
 357 static void realview_eb11mp_fixup(void)
 358 {
 359         /* AMBA devices */
 360         dmac_device.irq[0]      = IRQ_EB11MP_DMA;
 361         uart0_device.irq[0]     = IRQ_EB11MP_UART0;
 362         uart1_device.irq[0]     = IRQ_EB11MP_UART1;
 363         uart2_device.irq[0]     = IRQ_EB11MP_UART2;
 364         uart3_device.irq[0]     = IRQ_EB11MP_UART3;
 365         clcd_device.irq[0]      = IRQ_EB11MP_CLCD;
 366         wdog_device.irq[0]      = IRQ_EB11MP_WDOG;
 367         gpio0_device.irq[0]     = IRQ_EB11MP_GPIO0;
 368         gpio1_device.irq[0]     = IRQ_EB11MP_GPIO1;
 369         gpio2_device.irq[0]     = IRQ_EB11MP_GPIO2;
 370         rtc_device.irq[0]       = IRQ_EB11MP_RTC;
 371         sci0_device.irq[0]      = IRQ_EB11MP_SCI;
 372         ssp0_device.irq[0]      = IRQ_EB11MP_SSP;
 373         aaci_device.irq[0]      = IRQ_EB11MP_AACI;
 374         mmc0_device.irq[0]      = IRQ_EB11MP_MMCI0A;
 375         mmc0_device.irq[1]      = IRQ_EB11MP_MMCI0B;
 376         kmi0_device.irq[0]      = IRQ_EB11MP_KMI0;
 377         kmi1_device.irq[0]      = IRQ_EB11MP_KMI1;
 378
 379         /* platform devices */
 380         realview_eb_eth_resources[1].start      = IRQ_EB11MP_ETH;
 381         realview_eb_eth_resources[1].end        = IRQ_EB11MP_ETH;
 382         realview_eb_isp1761_resources[1].start  = IRQ_EB11MP_USB;
 383         realview_eb_isp1761_resources[1].end    = IRQ_EB11MP_USB;
 384 }
 385
 386 #ifdef CONFIG_HAVE_ARM_TWD
 387 static DEFINE_TWD_LOCAL_TIMER(twd_local_timer,
 388                               REALVIEW_EB11MP_TWD_BASE,
 389                               IRQ_LOCALTIMER);
 390
 391 static void __init realview_eb_twd_init(void)
 392 {
 393         if (core_tile_eb11mp() || core_tile_a9mp()) {
 394                 int err = twd_local_timer_register(&twd_local_timer);
 395                 if (err)
 396                         pr_err("twd_local_timer_register failed %d\n", err);
 397         }
 398 }
 399 #else
 400 #define realview_eb_twd_init()  do { } while(0)
 401 #endif
 402
 403 static void __init realview_eb_timer_init(void)
 404 {
 405         unsigned int timer_irq;
 406
 407         timer0_va_base = __io_address(REALVIEW_EB_TIMER0_1_BASE);
 408         timer1_va_base = __io_address(REALVIEW_EB_TIMER0_1_BASE) + 0x20;
 409         timer2_va_base = __io_address(REALVIEW_EB_TIMER2_3_BASE);
 410         timer3_va_base = __io_address(REALVIEW_EB_TIMER2_3_BASE) + 0x20;
 411
 412         if (core_tile_eb11mp() || core_tile_a9mp())
 413                 timer_irq = IRQ_EB11MP_TIMER0_1;
 414         else
 415                 timer_irq = IRQ_EB_TIMER0_1;
 416
 417         realview_clk_init(__io_address(REALVIEW_SYS_BASE), false);
 418         realview_timer_init(timer_irq);
 419         realview_eb_twd_init();
 420 }
 421
 422 static void realview_eb_restart(enum reboot_mode mode, const char *cmd)
 423 {
 424         void __iomem *reset_ctrl = __io_address(REALVIEW_SYS_RESETCTL);
 425         void __iomem *lock_ctrl = __io_address(REALVIEW_SYS_LOCK);
 426
 427         /*
 428          * To reset, we hit the on-board reset register
 429          * in the system FPGA
 430          */
 431         __raw_writel(REALVIEW_SYS_LOCK_VAL, lock_ctrl);
 432         if (core_tile_eb11mp())
 433                 __raw_writel(0x0008, reset_ctrl);
 434         dsb();
 435 }
 436
 437 static void __init realview_eb_init(void)
 438 {
 439         int i;
 440
 441         if (core_tile_eb11mp() || core_tile_a9mp()) {
 442                 realview_eb11mp_fixup();
 443
 444 #ifdef CONFIG_CACHE_L2X0
 445                 /*
 446                  * The PL220 needs to be manually configured as the hardware
 447                  * doesn't report the correct sizes.
 448                  * 1MB (128KB/way), 8-way associativity, event monitor and
 449                  * parity enabled, ignore share bit, no force write allocate
 450                  * Bits:  .... ...0 0111 1001 0000 .... .... ....
 451                  */
 452                 l2x0_init(__io_address(REALVIEW_EB11MP_L220_BASE), 0x00790000, 0xfe000fff);
 453 #endif
 454                 pmu_device.name = core_tile_a9mp() ? "armv7-pmu" : "armv6-pmu";
 455                 platform_device_register(&pmu_device);
 456         }
 457
 458         realview_flash_register(&realview_eb_flash_resource, 1);
 459         platform_device_register(&realview_i2c_device);
 460         platform_device_register(&char_lcd_device);
 461         platform_device_register(&realview_leds_device);
 462         eth_device_register();
 463         realview_usb_register(realview_eb_isp1761_resources);
 464
 465         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 466                 struct amba_device *d = amba_devs[i];
 467                 amba_device_register(d, &iomem_resource);
 468         }
 469 }
 470
 471 MACHINE_START(REALVIEW_EB, "ARM-RealView EB")
 472         /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
 473         .atag_offset    = 0x100,
 474         .smp            = smp_ops(realview_smp_ops),
 475         .fixup          = realview_fixup,
 476         .map_io         = realview_eb_map_io,
 477         .init_early     = realview_init_early,
 478         .init_irq       = gic_init_irq,
 479         .init_time      = realview_eb_timer_init,
 480         .init_machine   = realview_eb_init,
 481 #ifdef CONFIG_ZONE_DMA
 482         .dma_zone_size  = SZ_256M,
 483 #endif
 484         .restart        = realview_eb_restart,
 485 MACHINE_END