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 static const struct of_device_id fpga_irq_of_match[] __initconst = {
 254         { .compatible = "arm,versatile-fpga-irq", .data = fpga_irq_of_init, },
 255         { /* Sentinel */ }
 256 };
 257
 258 static void __init intcp_init_irq_of(void)
 259 {
 260         of_irq_init(fpga_irq_of_match);
 261         integrator_clk_init(true);
 262 }
 263
 264 /*
 265  * For the Device Tree, add in the UART, MMC and CLCD specifics as AUXDATA
 266  * and enforce the bus names since these are used for clock lookups.
 267  */
 268 static struct of_dev_auxdata intcp_auxdata_lookup[] __initdata = {
 269         OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_RTC_BASE,
 270                 "rtc", NULL),
 271         OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART0_BASE,
 272                 "uart0", NULL),
 273         OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART1_BASE,
 274                 "uart1", NULL),
 275         OF_DEV_AUXDATA("arm,primecell", KMI0_BASE,
 276                 "kmi0", NULL),
 277         OF_DEV_AUXDATA("arm,primecell", KMI1_BASE,
 278                 "kmi1", NULL),
 279         OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_CP_MMC_BASE,
 280                 "mmci", &mmc_data),
 281         OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_CP_AACI_BASE,
 282                 "aaci", &mmc_data),
 283         OF_DEV_AUXDATA("arm,primecell", INTCP_PA_CLCD_BASE,
 284                 "clcd", &clcd_data),
 285         OF_DEV_AUXDATA("cfi-flash", INTCP_PA_FLASH_BASE,
 286                 "physmap-flash", &intcp_flash_data),
 287         { /* sentinel */ },
 288 };
 289
 290 static void __init intcp_init_of(void)
 291 {
 292         struct device_node *root;
 293         struct device_node *cpcon;
 294         struct device *parent;
 295         struct soc_device *soc_dev;
 296         struct soc_device_attribute *soc_dev_attr;
 297         u32 intcp_sc_id;
 298         int err;
 299
 300         /* Here we create an SoC device for the root node */
 301         root = of_find_node_by_path("/");
 302         if (!root)
 303                 return;
 304         cpcon = of_find_node_by_path("/cpcon");
 305         if (!cpcon)
 306                 return;
 307
 308         intcp_con_base = of_iomap(cpcon, 0);
 309         if (!intcp_con_base)
 310                 return;
 311
 312         intcp_sc_id = readl(intcp_con_base);
 313
 314         soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
 315         if (!soc_dev_attr)
 316                 return;
 317
 318         err = of_property_read_string(root, "compatible",
 319                                       &soc_dev_attr->soc_id);
 320         if (err)
 321                 return;
 322         err = of_property_read_string(root, "model", &soc_dev_attr->machine);
 323         if (err)
 324                 return;
 325         soc_dev_attr->family = "Integrator";
 326         soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c",
 327                                            'A' + (intcp_sc_id & 0x0f));
 328
 329         soc_dev = soc_device_register(soc_dev_attr);
 330         if (IS_ERR(soc_dev)) {
 331                 kfree(soc_dev_attr->revision);
 332                 kfree(soc_dev_attr);
 333                 return;
 334         }
 335
 336         parent = soc_device_to_device(soc_dev);
 337         integrator_init_sysfs(parent, intcp_sc_id);
 338         of_platform_populate(root, of_default_bus_match_table,
 339                         intcp_auxdata_lookup, parent);
 340 }
 341
 342 static const char * intcp_dt_board_compat[] = {
 343         "arm,integrator-cp",
 344         NULL,
 345 };
 346
 347 DT_MACHINE_START(INTEGRATOR_CP_DT, "ARM Integrator/CP (Device Tree)")
 348         .reserve        = integrator_reserve,
 349         .map_io         = intcp_map_io,
 350         .init_early     = intcp_init_early,
 351         .init_irq       = intcp_init_irq_of,
 352         .handle_irq     = fpga_handle_irq,
 353         .init_machine   = intcp_init_of,
 354         .restart        = integrator_restart,
 355         .dt_compat      = intcp_dt_board_compat,
 356 MACHINE_END
 357
 358 #endif
 359
 360 #ifdef CONFIG_ATAGS
 361
 362 /*
 363  * For the ATAG boot some static mappings are needed. This will
 364  * go away with the ATAG support down the road.
 365  */
 366
 367 static struct map_desc intcp_io_desc_atag[] __initdata = {
 368         {
 369                 .virtual        = IO_ADDRESS(INTEGRATOR_CP_CTL_BASE),
 370                 .pfn            = __phys_to_pfn(INTEGRATOR_CP_CTL_BASE),
 371                 .length         = SZ_4K,
 372                 .type           = MT_DEVICE
 373         },
 374 };
 375
 376 static void __init intcp_map_io_atag(void)
 377 {
 378         iotable_init(intcp_io_desc_atag, ARRAY_SIZE(intcp_io_desc_atag));
 379         intcp_con_base = __io_address(INTEGRATOR_CP_CTL_BASE);
 380         intcp_map_io();
 381 }
 382
 383
 384 /*
 385  * This is where non-devicetree initialization code is collected and stashed
 386  * for eventual deletion.
 387  */
 388
 389 #define INTCP_FLASH_SIZE                SZ_32M
 390
 391 static struct resource intcp_flash_resource = {
 392         .start          = INTCP_PA_FLASH_BASE,
 393         .end            = INTCP_PA_FLASH_BASE + INTCP_FLASH_SIZE - 1,
 394         .flags          = IORESOURCE_MEM,
 395 };
 396
 397 static struct platform_device intcp_flash_device = {
 398         .name           = "physmap-flash",
 399         .id             = 0,
 400         .dev            = {
 401                 .platform_data  = &intcp_flash_data,
 402         },
 403         .num_resources  = 1,
 404         .resource       = &intcp_flash_resource,
 405 };
 406
 407 #define INTCP_ETH_SIZE                  0x10
 408
 409 static struct resource smc91x_resources[] = {
 410         [0] = {
 411                 .start  = INTEGRATOR_CP_ETH_BASE,
 412                 .end    = INTEGRATOR_CP_ETH_BASE + INTCP_ETH_SIZE - 1,
 413                 .flags  = IORESOURCE_MEM,
 414         },
 415         [1] = {
 416                 .start  = IRQ_CP_ETHINT,
 417                 .end    = IRQ_CP_ETHINT,
 418                 .flags  = IORESOURCE_IRQ,
 419         },
 420 };
 421
 422 static struct platform_device smc91x_device = {
 423         .name           = "smc91x",
 424         .id             = 0,
 425         .num_resources  = ARRAY_SIZE(smc91x_resources),
 426         .resource       = smc91x_resources,
 427 };
 428
 429 static struct platform_device *intcp_devs[] __initdata = {
 430         &intcp_flash_device,
 431         &smc91x_device,
 432 };
 433
 434 #define INTCP_VA_CIC_BASE               __io_address(INTEGRATOR_HDR_BASE + 0x40)
 435 #define INTCP_VA_PIC_BASE               __io_address(INTEGRATOR_IC_BASE)
 436 #define INTCP_VA_SIC_BASE               __io_address(INTEGRATOR_CP_SIC_BASE)
 437
 438 static void __init intcp_init_irq(void)
 439 {
 440         u32 pic_mask, cic_mask, sic_mask;
 441
 442         /* These masks are for the HW IRQ registers */
 443         pic_mask = ~((~0u) << (11 - 0));
 444         pic_mask |= (~((~0u) << (29 - 22))) << 22;
 445         cic_mask = ~((~0u) << (1 + IRQ_CIC_END - IRQ_CIC_START));
 446         sic_mask = ~((~0u) << (1 + IRQ_SIC_END - IRQ_SIC_START));
 447
 448         /*
 449          * Disable all interrupt sources
 450          */
 451         writel(0xffffffff, INTCP_VA_PIC_BASE + IRQ_ENABLE_CLEAR);
 452         writel(0xffffffff, INTCP_VA_PIC_BASE + FIQ_ENABLE_CLEAR);
 453         writel(0xffffffff, INTCP_VA_CIC_BASE + IRQ_ENABLE_CLEAR);
 454         writel(0xffffffff, INTCP_VA_CIC_BASE + FIQ_ENABLE_CLEAR);
 455         writel(sic_mask, INTCP_VA_SIC_BASE + IRQ_ENABLE_CLEAR);
 456         writel(sic_mask, INTCP_VA_SIC_BASE + FIQ_ENABLE_CLEAR);
 457
 458         fpga_irq_init(INTCP_VA_PIC_BASE, "PIC", IRQ_PIC_START,
 459                       -1, pic_mask, NULL);
 460
 461         fpga_irq_init(INTCP_VA_CIC_BASE, "CIC", IRQ_CIC_START,
 462                       -1, cic_mask, NULL);
 463
 464         fpga_irq_init(INTCP_VA_SIC_BASE, "SIC", IRQ_SIC_START,
 465                       IRQ_CP_CPPLDINT, sic_mask, NULL);
 466
 467         integrator_clk_init(true);
 468 }
 469
 470 #define TIMER0_VA_BASE __io_address(INTEGRATOR_TIMER0_BASE)
 471 #define TIMER1_VA_BASE __io_address(INTEGRATOR_TIMER1_BASE)
 472 #define TIMER2_VA_BASE __io_address(INTEGRATOR_TIMER2_BASE)
 473
 474 static void __init cp_timer_init(void)
 475 {
 476         writel(0, TIMER0_VA_BASE + TIMER_CTRL);
 477         writel(0, TIMER1_VA_BASE + TIMER_CTRL);
 478         writel(0, TIMER2_VA_BASE + TIMER_CTRL);
 479
 480         sp804_clocksource_init(TIMER2_VA_BASE, "timer2");
 481         sp804_clockevents_init(TIMER1_VA_BASE, IRQ_TIMERINT1, "timer1");
 482 }
 483
 484 #define INTEGRATOR_CP_MMC_IRQS  { IRQ_CP_MMCIINT0, IRQ_CP_MMCIINT1 }
 485 #define INTEGRATOR_CP_AACI_IRQS { IRQ_CP_AACIINT }
 486
 487 static AMBA_APB_DEVICE(mmc, "mmci", 0, INTEGRATOR_CP_MMC_BASE,
 488         INTEGRATOR_CP_MMC_IRQS, &mmc_data);
 489
 490 static AMBA_APB_DEVICE(aaci, "aaci", 0, INTEGRATOR_CP_AACI_BASE,
 491         INTEGRATOR_CP_AACI_IRQS, NULL);
 492
 493 static AMBA_AHB_DEVICE(clcd, "clcd", 0, INTCP_PA_CLCD_BASE,
 494         { IRQ_CP_CLCDCINT }, &clcd_data);
 495
 496 static struct amba_device *amba_devs[] __initdata = {
 497         &mmc_device,
 498         &aaci_device,
 499         &clcd_device,
 500 };
 501
 502 static void __init intcp_init(void)
 503 {
 504         int i;
 505
 506         platform_add_devices(intcp_devs, ARRAY_SIZE(intcp_devs));
 507
 508         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 509                 struct amba_device *d = amba_devs[i];
 510                 amba_device_register(d, &iomem_resource);
 511         }
 512         integrator_init(true);
 513 }
 514
 515 MACHINE_START(CINTEGRATOR, "ARM-IntegratorCP")
 516         /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
 517         .atag_offset    = 0x100,
 518         .reserve        = integrator_reserve,
 519         .map_io         = intcp_map_io_atag,
 520         .init_early     = intcp_init_early,
 521         .init_irq       = intcp_init_irq,
 522         .handle_irq     = fpga_handle_irq,
 523         .init_time      = cp_timer_init,
 524         .init_machine   = intcp_init,
 525         .restart        = integrator_restart,
 526 MACHINE_END
 527
 528 #endif