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