arch/arm/mach-integrator/integrator_cp.c

   1 /*
   2  *  linux/arch/arm/mach-integrator/integrator_cp.c
   3  *
   4  *  Copyright (C) 2003 Deep Blue Solutions Ltd
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License.
   9  */
  10 #include <linux/types.h>
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/list.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/dma-mapping.h>
  16 #include <linux/string.h>
  17 #include <linux/device.h>
  18 #include <linux/amba/bus.h>
  19 #include <linux/amba/kmi.h>
  20 #include <linux/amba/clcd.h>
  21 #include <linux/amba/mmci.h>
  22 #include <linux/io.h>
  23 #include <linux/irqchip/versatile-fpga.h>
  24 #include <linux/gfp.h>
  25 #include <linux/mtd/physmap.h>
  26 #include <linux/platform_data/clk-integrator.h>
  27 #include <linux/of_irq.h>
  28 #include <linux/of_address.h>
  29 #include <linux/of_platform.h>
  30 #include <linux/sys_soc.h>
  31
  32 #include <mach/hardware.h>
  33 #include <mach/platform.h>
  34 #include <asm/setup.h>
  35 #include <asm/mach-types.h>
  36 #include <asm/hardware/arm_timer.h>
  37 #include <asm/hardware/icst.h>
  38
  39 #include <mach/cm.h>
  40 #include <mach/lm.h>
  41 #include <mach/irqs.h>
  42
  43 #include <asm/mach/arch.h>
  44 #include <asm/mach/irq.h>
  45 #include <asm/mach/map.h>
  46 #include <asm/mach/time.h>
  47
  48 #include <asm/hardware/timer-sp.h>
  49
  50 #include <plat/clcd.h>
  51 #include <plat/sched_clock.h>
  52
  53 #include "common.h"
  54
  55 /* Base address to the CP controller */
  56 static void __iomem *intcp_con_base;
  57
  58 #define INTCP_PA_FLASH_BASE             0x24000000
  59
  60 #define INTCP_PA_CLCD_BASE              0xc0000000
  61
  62 #define INTCP_FLASHPROG                 0x04
  63 #define CINTEGRATOR_FLASHPROG_FLVPPEN   (1 << 0)
  64 #define CINTEGRATOR_FLASHPROG_FLWREN    (1 << 1)
  65
  66 /*
  67  * Logical      Physical
  68  * f1000000     10000000        Core module registers
  69  * f1100000     11000000        System controller registers
  70  * f1200000     12000000        EBI registers
  71  * f1300000     13000000        Counter/Timer
  72  * f1400000     14000000        Interrupt controller
  73  * f1600000     16000000        UART 0
  74  * f1700000     17000000        UART 1
  75  * f1a00000     1a000000        Debug LEDs
  76  * fc900000     c9000000        GPIO
  77  * fca00000     ca000000        SIC
  78  * fcb00000     cb000000        CP system control
  79  */
  80
  81 static struct map_desc intcp_io_desc[] __initdata __maybe_unused = {
  82         {
  83                 .virtual        = IO_ADDRESS(INTEGRATOR_HDR_BASE),
  84                 .pfn            = __phys_to_pfn(INTEGRATOR_HDR_BASE),
  85                 .length         = SZ_4K,
  86                 .type           = MT_DEVICE
  87         }, {
  88                 .virtual        = IO_ADDRESS(INTEGRATOR_EBI_BASE),
  89                 .pfn            = __phys_to_pfn(INTEGRATOR_EBI_BASE),
  90                 .length         = SZ_4K,
  91                 .type           = MT_DEVICE
  92         }, {
  93                 .virtual        = IO_ADDRESS(INTEGRATOR_CT_BASE),
  94                 .pfn            = __phys_to_pfn(INTEGRATOR_CT_BASE),
  95                 .length         = SZ_4K,
  96                 .type           = MT_DEVICE
  97         }, {
  98                 .virtual        = IO_ADDRESS(INTEGRATOR_IC_BASE),
  99                 .pfn            = __phys_to_pfn(INTEGRATOR_IC_BASE),
 100                 .length         = SZ_4K,
 101                 .type           = MT_DEVICE
 102         }, {
 103                 .virtual        = IO_ADDRESS(INTEGRATOR_UART0_BASE),
 104                 .pfn            = __phys_to_pfn(INTEGRATOR_UART0_BASE),
 105                 .length         = SZ_4K,
 106                 .type           = MT_DEVICE
 107         }, {
 108                 .virtual        = IO_ADDRESS(INTEGRATOR_DBG_BASE),
 109                 .pfn            = __phys_to_pfn(INTEGRATOR_DBG_BASE),
 110                 .length         = SZ_4K,
 111                 .type           = MT_DEVICE
 112         }, {
 113                 .virtual        = IO_ADDRESS(INTEGRATOR_CP_GPIO_BASE),
 114                 .pfn            = __phys_to_pfn(INTEGRATOR_CP_GPIO_BASE),
 115                 .length         = SZ_4K,
 116                 .type           = MT_DEVICE
 117         }, {
 118                 .virtual        = IO_ADDRESS(INTEGRATOR_CP_SIC_BASE),
 119                 .pfn            = __phys_to_pfn(INTEGRATOR_CP_SIC_BASE),
 120                 .length         = SZ_4K,
 121                 .type           = MT_DEVICE
 122         }
 123 };
 124
 125 static void __init intcp_map_io(void)
 126 {
 127         iotable_init(intcp_io_desc, ARRAY_SIZE(intcp_io_desc));
 128 }
 129
 130 /*
 131  * Flash handling.
 132  */
 133 static int intcp_flash_init(struct platform_device *dev)
 134 {
 135         u32 val;
 136
 137         val = readl(intcp_con_base + INTCP_FLASHPROG);
 138         val |= CINTEGRATOR_FLASHPROG_FLWREN;
 139         writel(val, intcp_con_base + INTCP_FLASHPROG);
 140
 141         return 0;
 142 }
 143
 144 static void intcp_flash_exit(struct platform_device *dev)
 145 {
 146         u32 val;
 147
 148         val = readl(intcp_con_base + INTCP_FLASHPROG);
 149         val &= ~(CINTEGRATOR_FLASHPROG_FLVPPEN|CINTEGRATOR_FLASHPROG_FLWREN);
 150         writel(val, intcp_con_base + INTCP_FLASHPROG);
 151 }
 152
 153 static void intcp_flash_set_vpp(struct platform_device *pdev, int on)
 154 {
 155         u32 val;
 156
 157         val = readl(intcp_con_base + INTCP_FLASHPROG);
 158         if (on)
 159                 val |= CINTEGRATOR_FLASHPROG_FLVPPEN;
 160         else
 161                 val &= ~CINTEGRATOR_FLASHPROG_FLVPPEN;
 162         writel(val, intcp_con_base + INTCP_FLASHPROG);
 163 }
 164
 165 static struct physmap_flash_data intcp_flash_data = {
 166         .width          = 4,
 167         .init           = intcp_flash_init,
 168         .exit           = intcp_flash_exit,
 169         .set_vpp        = intcp_flash_set_vpp,
 170 };
 171
 172 /*
 173  * It seems that the card insertion interrupt remains active after
 174  * we've acknowledged it.  We therefore ignore the interrupt, and
 175  * rely on reading it from the SIC.  This also means that we must
 176  * clear the latched interrupt.
 177  */
 178 static unsigned int mmc_status(struct device *dev)
 179 {
 180         unsigned int status = readl(__io_address(0xca000000 + 4));
 181         writel(8, intcp_con_base + 8);
 182
 183         return status & 8;
 184 }
 185
 186 static struct mmci_platform_data mmc_data = {
 187         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 188         .status         = mmc_status,
 189         .gpio_wp        = -1,
 190         .gpio_cd        = -1,
 191 };
 192
 193 /*
 194  * CLCD support
 195  */
 196 /*
 197  * Ensure VGA is selected.
 198  */
 199 static void cp_clcd_enable(struct clcd_fb *fb)
 200 {
 201         struct fb_var_screeninfo *var = &fb->fb.var;
 202         u32 val = CM_CTRL_STATIC1 | CM_CTRL_STATIC2;
 203
 204         if (var->bits_per_pixel <= 8 ||
 205             (var->bits_per_pixel == 16 && var->green.length == 5))
 206                 /* Pseudocolor, RGB555, BGR555 */
 207                 val |= CM_CTRL_LCDMUXSEL_VGA555_TFT555;
 208         else if (fb->fb.var.bits_per_pixel <= 16)
 209                 /* truecolor RGB565 */
 210                 val |= CM_CTRL_LCDMUXSEL_VGA565_TFT555;
 211         else
 212                 val = 0; /* no idea for this, don't trust the docs */
 213
 214         cm_control(CM_CTRL_LCDMUXSEL_MASK|
 215                    CM_CTRL_LCDEN0|
 216                    CM_CTRL_LCDEN1|
 217                    CM_CTRL_STATIC1|
 218                    CM_CTRL_STATIC2|
 219                    CM_CTRL_STATIC|
 220                    CM_CTRL_n24BITEN, val);
 221 }
 222
 223 static int cp_clcd_setup(struct clcd_fb *fb)
 224 {
 225         fb->panel = versatile_clcd_get_panel("VGA");
 226         if (!fb->panel)
 227                 return -EINVAL;
 228
 229         return versatile_clcd_setup_dma(fb, SZ_1M);
 230 }
 231
 232 static struct clcd_board clcd_data = {
 233         .name           = "Integrator/CP",
 234         .caps           = CLCD_CAP_5551 | CLCD_CAP_RGB565 | CLCD_CAP_888,
 235         .check          = clcdfb_check,
 236         .decode         = clcdfb_decode,
 237         .enable         = cp_clcd_enable,
 238         .setup          = cp_clcd_setup,
 239         .mmap           = versatile_clcd_mmap_dma,
 240         .remove         = versatile_clcd_remove_dma,
 241 };
 242
 243 #define REFCOUNTER (__io_address(INTEGRATOR_HDR_BASE) + 0x28)
 244
 245 static void __init intcp_init_early(void)
 246 {
 247 #ifdef CONFIG_PLAT_VERSATILE_SCHED_CLOCK
 248         versatile_sched_clock_init(REFCOUNTER, 24000000);
 249 #endif
 250 }
 251
 252 #ifdef CONFIG_OF
 253
 254 static void __init cp_of_timer_init(void)
 255 {
 256         struct device_node *node;
 257         const char *path;
 258         void __iomem *base;
 259         int err;
 260         int irq;
 261
 262         err = of_property_read_string(of_aliases,
 263                                 "arm,timer-primary", &path);
 264         if (WARN_ON(err))
 265                 return;
 266         node = of_find_node_by_path(path);
 267         base = of_iomap(node, 0);
 268         if (WARN_ON(!base))
 269                 return;
 270         writel(0, base + TIMER_CTRL);
 271         sp804_clocksource_init(base, node->name);
 272
 273         err = of_property_read_string(of_aliases,
 274                                 "arm,timer-secondary", &path);
 275         if (WARN_ON(err))
 276                 return;
 277         node = of_find_node_by_path(path);
 278         base = of_iomap(node, 0);
 279         if (WARN_ON(!base))
 280                 return;
 281         irq = irq_of_parse_and_map(node, 0);
 282         writel(0, base + TIMER_CTRL);
 283         sp804_clockevents_init(base, irq, node->name);
 284 }
 285
 286 static const struct of_device_id fpga_irq_of_match[] __initconst = {
 287         { .compatible = "arm,versatile-fpga-irq", .data = fpga_irq_of_init, },
 288         { /* Sentinel */ }
 289 };
 290
 291 static void __init intcp_init_irq_of(void)
 292 {
 293         of_irq_init(fpga_irq_of_match);
 294         integrator_clk_init(true);
 295 }
 296
 297 /*
 298  * For the Device Tree, add in the UART, MMC and CLCD specifics as AUXDATA
 299  * and enforce the bus names since these are used for clock lookups.
 300  */
 301 static struct of_dev_auxdata intcp_auxdata_lookup[] __initdata = {
 302         OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_RTC_BASE,
 303                 "rtc", NULL),
 304         OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART0_BASE,
 305                 "uart0", NULL),
 306         OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART1_BASE,
 307                 "uart1", NULL),
 308         OF_DEV_AUXDATA("arm,primecell", KMI0_BASE,
 309                 "kmi0", NULL),
 310         OF_DEV_AUXDATA("arm,primecell", KMI1_BASE,
 311                 "kmi1", NULL),
 312         OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_CP_MMC_BASE,
 313                 "mmci", &mmc_data),
 314         OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_CP_AACI_BASE,
 315                 "aaci", &mmc_data),
 316         OF_DEV_AUXDATA("arm,primecell", INTCP_PA_CLCD_BASE,
 317                 "clcd", &clcd_data),
 318         OF_DEV_AUXDATA("cfi-flash", INTCP_PA_FLASH_BASE,
 319                 "physmap-flash", &intcp_flash_data),
 320         { /* sentinel */ },
 321 };
 322
 323 static void __init intcp_init_of(void)
 324 {
 325         struct device_node *root;
 326         struct device_node *cpcon;
 327         struct device *parent;
 328         struct soc_device *soc_dev;
 329         struct soc_device_attribute *soc_dev_attr;
 330         u32 intcp_sc_id;
 331         int err;
 332
 333         /* Here we create an SoC device for the root node */
 334         root = of_find_node_by_path("/");
 335         if (!root)
 336                 return;
 337         cpcon = of_find_node_by_path("/cpcon");
 338         if (!cpcon)
 339                 return;
 340
 341         intcp_con_base = of_iomap(cpcon, 0);
 342         if (!intcp_con_base)
 343                 return;
 344
 345         intcp_sc_id = readl(intcp_con_base);
 346
 347         soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
 348         if (!soc_dev_attr)
 349                 return;
 350
 351         err = of_property_read_string(root, "compatible",
 352                                       &soc_dev_attr->soc_id);
 353         if (err)
 354                 return;
 355         err = of_property_read_string(root, "model", &soc_dev_attr->machine);
 356         if (err)
 357                 return;
 358         soc_dev_attr->family = "Integrator";
 359         soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c",
 360                                            'A' + (intcp_sc_id & 0x0f));
 361
 362         soc_dev = soc_device_register(soc_dev_attr);
 363         if (IS_ERR(soc_dev)) {
 364                 kfree(soc_dev_attr->revision);
 365                 kfree(soc_dev_attr);
 366                 return;
 367         }
 368
 369         parent = soc_device_to_device(soc_dev);
 370         integrator_init_sysfs(parent, intcp_sc_id);
 371         of_platform_populate(root, of_default_bus_match_table,
 372                         intcp_auxdata_lookup, parent);
 373 }
 374
 375 static const char * intcp_dt_board_compat[] = {
 376         "arm,integrator-cp",
 377         NULL,
 378 };
 379
 380 DT_MACHINE_START(INTEGRATOR_CP_DT, "ARM Integrator/CP (Device Tree)")
 381         .reserve        = integrator_reserve,
 382         .map_io         = intcp_map_io,
 383         .init_early     = intcp_init_early,
 384         .init_irq       = intcp_init_irq_of,
 385         .handle_irq     = fpga_handle_irq,
 386         .init_time      = cp_of_timer_init,
 387         .init_machine   = intcp_init_of,
 388         .restart        = integrator_restart,
 389         .dt_compat      = intcp_dt_board_compat,
 390 MACHINE_END
 391
 392 #endif
 393
 394 #ifdef CONFIG_ATAGS
 395
 396 /*
 397  * For the ATAG boot some static mappings are needed. This will
 398  * go away with the ATAG support down the road.
 399  */
 400
 401 static struct map_desc intcp_io_desc_atag[] __initdata = {
 402         {
 403                 .virtual        = IO_ADDRESS(INTEGRATOR_CP_CTL_BASE),
 404                 .pfn            = __phys_to_pfn(INTEGRATOR_CP_CTL_BASE),
 405                 .length         = SZ_4K,
 406                 .type           = MT_DEVICE
 407         },
 408 };
 409
 410 static void __init intcp_map_io_atag(void)
 411 {
 412         iotable_init(intcp_io_desc_atag, ARRAY_SIZE(intcp_io_desc_atag));
 413         intcp_con_base = __io_address(INTEGRATOR_CP_CTL_BASE);
 414         intcp_map_io();
 415 }
 416
 417
 418 /*
 419  * This is where non-devicetree initialization code is collected and stashed
 420  * for eventual deletion.
 421  */
 422
 423 #define INTCP_FLASH_SIZE                SZ_32M
 424
 425 static struct resource intcp_flash_resource = {
 426         .start          = INTCP_PA_FLASH_BASE,
 427         .end            = INTCP_PA_FLASH_BASE + INTCP_FLASH_SIZE - 1,
 428         .flags          = IORESOURCE_MEM,
 429 };
 430
 431 static struct platform_device intcp_flash_device = {
 432         .name           = "physmap-flash",
 433         .id             = 0,
 434         .dev            = {
 435                 .platform_data  = &intcp_flash_data,
 436         },
 437         .num_resources  = 1,
 438         .resource       = &intcp_flash_resource,
 439 };
 440
 441 #define INTCP_ETH_SIZE                  0x10
 442
 443 static struct resource smc91x_resources[] = {
 444         [0] = {
 445                 .start  = INTEGRATOR_CP_ETH_BASE,
 446                 .end    = INTEGRATOR_CP_ETH_BASE + INTCP_ETH_SIZE - 1,
 447                 .flags  = IORESOURCE_MEM,
 448         },
 449         [1] = {
 450                 .start  = IRQ_CP_ETHINT,
 451                 .end    = IRQ_CP_ETHINT,
 452                 .flags  = IORESOURCE_IRQ,
 453         },
 454 };
 455
 456 static struct platform_device smc91x_device = {
 457         .name           = "smc91x",
 458         .id             = 0,
 459         .num_resources  = ARRAY_SIZE(smc91x_resources),
 460         .resource       = smc91x_resources,
 461 };
 462
 463 static struct platform_device *intcp_devs[] __initdata = {
 464         &intcp_flash_device,
 465         &smc91x_device,
 466 };
 467
 468 #define INTCP_VA_CIC_BASE               __io_address(INTEGRATOR_HDR_BASE + 0x40)
 469 #define INTCP_VA_PIC_BASE               __io_address(INTEGRATOR_IC_BASE)
 470 #define INTCP_VA_SIC_BASE               __io_address(INTEGRATOR_CP_SIC_BASE)
 471
 472 static void __init intcp_init_irq(void)
 473 {
 474         u32 pic_mask, cic_mask, sic_mask;
 475
 476         /* These masks are for the HW IRQ registers */
 477         pic_mask = ~((~0u) << (11 - 0));
 478         pic_mask |= (~((~0u) << (29 - 22))) << 22;
 479         cic_mask = ~((~0u) << (1 + IRQ_CIC_END - IRQ_CIC_START));
 480         sic_mask = ~((~0u) << (1 + IRQ_SIC_END - IRQ_SIC_START));
 481
 482         /*
 483          * Disable all interrupt sources
 484          */
 485         writel(0xffffffff, INTCP_VA_PIC_BASE + IRQ_ENABLE_CLEAR);
 486         writel(0xffffffff, INTCP_VA_PIC_BASE + FIQ_ENABLE_CLEAR);
 487         writel(0xffffffff, INTCP_VA_CIC_BASE + IRQ_ENABLE_CLEAR);
 488         writel(0xffffffff, INTCP_VA_CIC_BASE + FIQ_ENABLE_CLEAR);
 489         writel(sic_mask, INTCP_VA_SIC_BASE + IRQ_ENABLE_CLEAR);
 490         writel(sic_mask, INTCP_VA_SIC_BASE + FIQ_ENABLE_CLEAR);
 491
 492         fpga_irq_init(INTCP_VA_PIC_BASE, "PIC", IRQ_PIC_START,
 493                       -1, pic_mask, NULL);
 494
 495         fpga_irq_init(INTCP_VA_CIC_BASE, "CIC", IRQ_CIC_START,
 496                       -1, cic_mask, NULL);
 497
 498         fpga_irq_init(INTCP_VA_SIC_BASE, "SIC", IRQ_SIC_START,
 499                       IRQ_CP_CPPLDINT, sic_mask, NULL);
 500
 501         integrator_clk_init(true);
 502 }
 503
 504 #define TIMER0_VA_BASE __io_address(INTEGRATOR_TIMER0_BASE)
 505 #define TIMER1_VA_BASE __io_address(INTEGRATOR_TIMER1_BASE)
 506 #define TIMER2_VA_BASE __io_address(INTEGRATOR_TIMER2_BASE)
 507
 508 static void __init cp_timer_init(void)
 509 {
 510         writel(0, TIMER0_VA_BASE + TIMER_CTRL);
 511         writel(0, TIMER1_VA_BASE + TIMER_CTRL);
 512         writel(0, TIMER2_VA_BASE + TIMER_CTRL);
 513
 514         sp804_clocksource_init(TIMER2_VA_BASE, "timer2");
 515         sp804_clockevents_init(TIMER1_VA_BASE, IRQ_TIMERINT1, "timer1");
 516 }
 517
 518 #define INTEGRATOR_CP_MMC_IRQS  { IRQ_CP_MMCIINT0, IRQ_CP_MMCIINT1 }
 519 #define INTEGRATOR_CP_AACI_IRQS { IRQ_CP_AACIINT }
 520
 521 static AMBA_APB_DEVICE(mmc, "mmci", 0, INTEGRATOR_CP_MMC_BASE,
 522         INTEGRATOR_CP_MMC_IRQS, &mmc_data);
 523
 524 static AMBA_APB_DEVICE(aaci, "aaci", 0, INTEGRATOR_CP_AACI_BASE,
 525         INTEGRATOR_CP_AACI_IRQS, NULL);
 526
 527 static AMBA_AHB_DEVICE(clcd, "clcd", 0, INTCP_PA_CLCD_BASE,
 528         { IRQ_CP_CLCDCINT }, &clcd_data);
 529
 530 static struct amba_device *amba_devs[] __initdata = {
 531         &mmc_device,
 532         &aaci_device,
 533         &clcd_device,
 534 };
 535
 536 static void __init intcp_init(void)
 537 {
 538         int i;
 539
 540         platform_add_devices(intcp_devs, ARRAY_SIZE(intcp_devs));
 541
 542         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 543                 struct amba_device *d = amba_devs[i];
 544                 amba_device_register(d, &iomem_resource);
 545         }
 546         integrator_init(true);
 547 }
 548
 549 MACHINE_START(CINTEGRATOR, "ARM-IntegratorCP")
 550         /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
 551         .atag_offset    = 0x100,
 552         .reserve        = integrator_reserve,
 553         .map_io         = intcp_map_io_atag,
 554         .init_early     = intcp_init_early,
 555         .init_irq       = intcp_init_irq,
 556         .handle_irq     = fpga_handle_irq,
 557         .init_time      = cp_timer_init,
 558         .init_machine   = intcp_init,
 559         .restart        = integrator_restart,
 560 MACHINE_END
 561
 562 #endif