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/sysdev.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/clkdev.h>
  25 #include <linux/mtd/physmap.h>
  26
  27 #include <mach/hardware.h>
  28 #include <mach/platform.h>
  29 #include <asm/irq.h>
  30 #include <asm/setup.h>
  31 #include <asm/mach-types.h>
  32 #include <asm/hardware/arm_timer.h>
  33 #include <asm/hardware/icst.h>
  34
  35 #include <mach/cm.h>
  36 #include <mach/lm.h>
  37
  38 #include <asm/mach/arch.h>
  39 #include <asm/mach/irq.h>
  40 #include <asm/mach/map.h>
  41 #include <asm/mach/time.h>
  42
  43 #include <asm/hardware/timer-sp.h>
  44
  45 #include <plat/clcd.h>
  46 #include <plat/fpga-irq.h>
  47 #include <plat/sched_clock.h>
  48
  49 #include "common.h"
  50
  51 #define INTCP_PA_FLASH_BASE             0x24000000
  52 #define INTCP_FLASH_SIZE                SZ_32M
  53
  54 #define INTCP_PA_CLCD_BASE              0xc0000000
  55
  56 #define INTCP_VA_CIC_BASE               __io_address(INTEGRATOR_HDR_BASE + 0x40)
  57 #define INTCP_VA_PIC_BASE               __io_address(INTEGRATOR_IC_BASE)
  58 #define INTCP_VA_SIC_BASE               __io_address(INTEGRATOR_CP_SIC_BASE)
  59
  60 #define INTCP_ETH_SIZE                  0x10
  61
  62 #define INTCP_VA_CTRL_BASE              IO_ADDRESS(INTEGRATOR_CP_CTL_BASE)
  63 #define INTCP_FLASHPROG                 0x04
  64 #define CINTEGRATOR_FLASHPROG_FLVPPEN   (1 << 0)
  65 #define CINTEGRATOR_FLASHPROG_FLWREN    (1 << 1)
  66
  67 /*
  68  * Logical      Physical
  69  * f1000000     10000000        Core module registers
  70  * f1100000     11000000        System controller registers
  71  * f1200000     12000000        EBI registers
  72  * f1300000     13000000        Counter/Timer
  73  * f1400000     14000000        Interrupt controller
  74  * f1600000     16000000        UART 0
  75  * f1700000     17000000        UART 1
  76  * f1a00000     1a000000        Debug LEDs
  77  * fc900000     c9000000        GPIO
  78  * fca00000     ca000000        SIC
  79  * fcb00000     cb000000        CP system control
  80  */
  81
  82 static struct map_desc intcp_io_desc[] __initdata = {
  83         {
  84                 .virtual        = IO_ADDRESS(INTEGRATOR_HDR_BASE),
  85                 .pfn            = __phys_to_pfn(INTEGRATOR_HDR_BASE),
  86                 .length         = SZ_4K,
  87                 .type           = MT_DEVICE
  88         }, {
  89                 .virtual        = IO_ADDRESS(INTEGRATOR_SC_BASE),
  90                 .pfn            = __phys_to_pfn(INTEGRATOR_SC_BASE),
  91                 .length         = SZ_4K,
  92                 .type           = MT_DEVICE
  93         }, {
  94                 .virtual        = IO_ADDRESS(INTEGRATOR_EBI_BASE),
  95                 .pfn            = __phys_to_pfn(INTEGRATOR_EBI_BASE),
  96                 .length         = SZ_4K,
  97                 .type           = MT_DEVICE
  98         }, {
  99                 .virtual        = IO_ADDRESS(INTEGRATOR_CT_BASE),
 100                 .pfn            = __phys_to_pfn(INTEGRATOR_CT_BASE),
 101                 .length         = SZ_4K,
 102                 .type           = MT_DEVICE
 103         }, {
 104                 .virtual        = IO_ADDRESS(INTEGRATOR_IC_BASE),
 105                 .pfn            = __phys_to_pfn(INTEGRATOR_IC_BASE),
 106                 .length         = SZ_4K,
 107                 .type           = MT_DEVICE
 108         }, {
 109                 .virtual        = IO_ADDRESS(INTEGRATOR_UART0_BASE),
 110                 .pfn            = __phys_to_pfn(INTEGRATOR_UART0_BASE),
 111                 .length         = SZ_4K,
 112                 .type           = MT_DEVICE
 113         }, {
 114                 .virtual        = IO_ADDRESS(INTEGRATOR_UART1_BASE),
 115                 .pfn            = __phys_to_pfn(INTEGRATOR_UART1_BASE),
 116                 .length         = SZ_4K,
 117                 .type           = MT_DEVICE
 118         }, {
 119                 .virtual        = IO_ADDRESS(INTEGRATOR_DBG_BASE),
 120                 .pfn            = __phys_to_pfn(INTEGRATOR_DBG_BASE),
 121                 .length         = SZ_4K,
 122                 .type           = MT_DEVICE
 123         }, {
 124                 .virtual        = IO_ADDRESS(INTEGRATOR_CP_GPIO_BASE),
 125                 .pfn            = __phys_to_pfn(INTEGRATOR_CP_GPIO_BASE),
 126                 .length         = SZ_4K,
 127                 .type           = MT_DEVICE
 128         }, {
 129                 .virtual        = IO_ADDRESS(INTEGRATOR_CP_SIC_BASE),
 130                 .pfn            = __phys_to_pfn(INTEGRATOR_CP_SIC_BASE),
 131                 .length         = SZ_4K,
 132                 .type           = MT_DEVICE
 133         }, {
 134                 .virtual        = IO_ADDRESS(INTEGRATOR_CP_CTL_BASE),
 135                 .pfn            = __phys_to_pfn(INTEGRATOR_CP_CTL_BASE),
 136                 .length         = SZ_4K,
 137                 .type           = MT_DEVICE
 138         }
 139 };
 140
 141 static void __init intcp_map_io(void)
 142 {
 143         iotable_init(intcp_io_desc, ARRAY_SIZE(intcp_io_desc));
 144 }
 145
 146 static struct fpga_irq_data cic_irq_data = {
 147         .base           = INTCP_VA_CIC_BASE,
 148         .irq_start      = IRQ_CIC_START,
 149         .chip.name      = "CIC",
 150 };
 151
 152 static struct fpga_irq_data pic_irq_data = {
 153         .base           = INTCP_VA_PIC_BASE,
 154         .irq_start      = IRQ_PIC_START,
 155         .chip.name      = "PIC",
 156 };
 157
 158 static struct fpga_irq_data sic_irq_data = {
 159         .base           = INTCP_VA_SIC_BASE,
 160         .irq_start      = IRQ_SIC_START,
 161         .chip.name      = "SIC",
 162 };
 163
 164 static void __init intcp_init_irq(void)
 165 {
 166         u32 pic_mask, sic_mask;
 167
 168         pic_mask = ~((~0u) << (11 - IRQ_PIC_START));
 169         pic_mask |= (~((~0u) << (29 - 22))) << 22;
 170         sic_mask = ~((~0u) << (1 + IRQ_SIC_END - IRQ_SIC_START));
 171
 172         /*
 173          * Disable all interrupt sources
 174          */
 175         writel(0xffffffff, INTCP_VA_PIC_BASE + IRQ_ENABLE_CLEAR);
 176         writel(0xffffffff, INTCP_VA_PIC_BASE + FIQ_ENABLE_CLEAR);
 177         writel(0xffffffff, INTCP_VA_CIC_BASE + IRQ_ENABLE_CLEAR);
 178         writel(0xffffffff, INTCP_VA_CIC_BASE + FIQ_ENABLE_CLEAR);
 179         writel(sic_mask, INTCP_VA_SIC_BASE + IRQ_ENABLE_CLEAR);
 180         writel(sic_mask, INTCP_VA_SIC_BASE + FIQ_ENABLE_CLEAR);
 181
 182         fpga_irq_init(-1, pic_mask, &pic_irq_data);
 183
 184         fpga_irq_init(-1, ~((~0u) << (1 + IRQ_CIC_END - IRQ_CIC_START)),
 185                 &cic_irq_data);
 186
 187         fpga_irq_init(IRQ_CP_CPPLDINT, sic_mask, &sic_irq_data);
 188 }
 189
 190 /*
 191  * Clock handling
 192  */
 193 #define CM_LOCK         (__io_address(INTEGRATOR_HDR_BASE)+INTEGRATOR_HDR_LOCK_OFFSET)
 194 #define CM_AUXOSC       (__io_address(INTEGRATOR_HDR_BASE)+0x1c)
 195
 196 static const struct icst_params cp_auxvco_params = {
 197         .ref            = 24000000,
 198         .vco_max        = ICST525_VCO_MAX_5V,
 199         .vco_min        = ICST525_VCO_MIN,
 200         .vd_min         = 8,
 201         .vd_max         = 263,
 202         .rd_min         = 3,
 203         .rd_max         = 65,
 204         .s2div          = icst525_s2div,
 205         .idx2s          = icst525_idx2s,
 206 };
 207
 208 static void cp_auxvco_set(struct clk *clk, struct icst_vco vco)
 209 {
 210         u32 val;
 211
 212         val = readl(clk->vcoreg) & ~0x7ffff;
 213         val |= vco.v | (vco.r << 9) | (vco.s << 16);
 214
 215         writel(0xa05f, CM_LOCK);
 216         writel(val, clk->vcoreg);
 217         writel(0, CM_LOCK);
 218 }
 219
 220 static const struct clk_ops cp_auxclk_ops = {
 221         .round  = icst_clk_round,
 222         .set    = icst_clk_set,
 223         .setvco = cp_auxvco_set,
 224 };
 225
 226 static struct clk cp_auxclk = {
 227         .ops    = &cp_auxclk_ops,
 228         .params = &cp_auxvco_params,
 229         .vcoreg = CM_AUXOSC,
 230 };
 231
 232 static struct clk sp804_clk = {
 233         .rate   = 1000000,
 234 };
 235
 236 static struct clk_lookup cp_lookups[] = {
 237         {       /* CLCD */
 238                 .dev_id         = "mb:c0",
 239                 .clk            = &cp_auxclk,
 240         }, {    /* SP804 timers */
 241                 .dev_id         = "sp804",
 242                 .clk            = &sp804_clk,
 243         },
 244 };
 245
 246 /*
 247  * Flash handling.
 248  */
 249 static int intcp_flash_init(struct platform_device *dev)
 250 {
 251         u32 val;
 252
 253         val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
 254         val |= CINTEGRATOR_FLASHPROG_FLWREN;
 255         writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
 256
 257         return 0;
 258 }
 259
 260 static void intcp_flash_exit(struct platform_device *dev)
 261 {
 262         u32 val;
 263
 264         val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
 265         val &= ~(CINTEGRATOR_FLASHPROG_FLVPPEN|CINTEGRATOR_FLASHPROG_FLWREN);
 266         writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
 267 }
 268
 269 static void intcp_flash_set_vpp(struct platform_device *pdev, int on)
 270 {
 271         u32 val;
 272
 273         val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
 274         if (on)
 275                 val |= CINTEGRATOR_FLASHPROG_FLVPPEN;
 276         else
 277                 val &= ~CINTEGRATOR_FLASHPROG_FLVPPEN;
 278         writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
 279 }
 280
 281 static struct physmap_flash_data intcp_flash_data = {
 282         .width          = 4,
 283         .init           = intcp_flash_init,
 284         .exit           = intcp_flash_exit,
 285         .set_vpp        = intcp_flash_set_vpp,
 286 };
 287
 288 static struct resource intcp_flash_resource = {
 289         .start          = INTCP_PA_FLASH_BASE,
 290         .end            = INTCP_PA_FLASH_BASE + INTCP_FLASH_SIZE - 1,
 291         .flags          = IORESOURCE_MEM,
 292 };
 293
 294 static struct platform_device intcp_flash_device = {
 295         .name           = "physmap-flash",
 296         .id             = 0,
 297         .dev            = {
 298                 .platform_data  = &intcp_flash_data,
 299         },
 300         .num_resources  = 1,
 301         .resource       = &intcp_flash_resource,
 302 };
 303
 304 static struct resource smc91x_resources[] = {
 305         [0] = {
 306                 .start  = INTEGRATOR_CP_ETH_BASE,
 307                 .end    = INTEGRATOR_CP_ETH_BASE + INTCP_ETH_SIZE - 1,
 308                 .flags  = IORESOURCE_MEM,
 309         },
 310         [1] = {
 311                 .start  = IRQ_CP_ETHINT,
 312                 .end    = IRQ_CP_ETHINT,
 313                 .flags  = IORESOURCE_IRQ,
 314         },
 315 };
 316
 317 static struct platform_device smc91x_device = {
 318         .name           = "smc91x",
 319         .id             = 0,
 320         .num_resources  = ARRAY_SIZE(smc91x_resources),
 321         .resource       = smc91x_resources,
 322 };
 323
 324 static struct platform_device *intcp_devs[] __initdata = {
 325         &intcp_flash_device,
 326         &smc91x_device,
 327 };
 328
 329 /*
 330  * It seems that the card insertion interrupt remains active after
 331  * we've acknowledged it.  We therefore ignore the interrupt, and
 332  * rely on reading it from the SIC.  This also means that we must
 333  * clear the latched interrupt.
 334  */
 335 static unsigned int mmc_status(struct device *dev)
 336 {
 337         unsigned int status = readl(IO_ADDRESS(0xca000000 + 4));
 338         writel(8, IO_ADDRESS(INTEGRATOR_CP_CTL_BASE + 8));
 339
 340         return status & 8;
 341 }
 342
 343 static struct mmci_platform_data mmc_data = {
 344         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 345         .status         = mmc_status,
 346         .gpio_wp        = -1,
 347         .gpio_cd        = -1,
 348 };
 349
 350 static struct amba_device mmc_device = {
 351         .dev            = {
 352                 .init_name = "mb:1c",
 353                 .platform_data = &mmc_data,
 354         },
 355         .res            = {
 356                 .start  = INTEGRATOR_CP_MMC_BASE,
 357                 .end    = INTEGRATOR_CP_MMC_BASE + SZ_4K - 1,
 358                 .flags  = IORESOURCE_MEM,
 359         },
 360         .irq            = { IRQ_CP_MMCIINT0, IRQ_CP_MMCIINT1 },
 361         .periphid       = 0,
 362 };
 363
 364 static struct amba_device aaci_device = {
 365         .dev            = {
 366                 .init_name = "mb:1d",
 367         },
 368         .res            = {
 369                 .start  = INTEGRATOR_CP_AACI_BASE,
 370                 .end    = INTEGRATOR_CP_AACI_BASE + SZ_4K - 1,
 371                 .flags  = IORESOURCE_MEM,
 372         },
 373         .irq            = { IRQ_CP_AACIINT, NO_IRQ },
 374         .periphid       = 0,
 375 };
 376
 377
 378 /*
 379  * CLCD support
 380  */
 381 /*
 382  * Ensure VGA is selected.
 383  */
 384 static void cp_clcd_enable(struct clcd_fb *fb)
 385 {
 386         struct fb_var_screeninfo *var = &fb->fb.var;
 387         u32 val = CM_CTRL_STATIC1 | CM_CTRL_STATIC2;
 388
 389         if (var->bits_per_pixel <= 8 ||
 390             (var->bits_per_pixel == 16 && var->green.length == 5))
 391                 /* Pseudocolor, RGB555, BGR555 */
 392                 val |= CM_CTRL_LCDMUXSEL_VGA555_TFT555;
 393         else if (fb->fb.var.bits_per_pixel <= 16)
 394                 /* truecolor RGB565 */
 395                 val |= CM_CTRL_LCDMUXSEL_VGA565_TFT555;
 396         else
 397                 val = 0; /* no idea for this, don't trust the docs */
 398
 399         cm_control(CM_CTRL_LCDMUXSEL_MASK|
 400                    CM_CTRL_LCDEN0|
 401                    CM_CTRL_LCDEN1|
 402                    CM_CTRL_STATIC1|
 403                    CM_CTRL_STATIC2|
 404                    CM_CTRL_STATIC|
 405                    CM_CTRL_n24BITEN, val);
 406 }
 407
 408 static int cp_clcd_setup(struct clcd_fb *fb)
 409 {
 410         fb->panel = versatile_clcd_get_panel("VGA");
 411         if (!fb->panel)
 412                 return -EINVAL;
 413
 414         return versatile_clcd_setup_dma(fb, SZ_1M);
 415 }
 416
 417 static struct clcd_board clcd_data = {
 418         .name           = "Integrator/CP",
 419         .caps           = CLCD_CAP_5551 | CLCD_CAP_RGB565 | CLCD_CAP_888,
 420         .check          = clcdfb_check,
 421         .decode         = clcdfb_decode,
 422         .enable         = cp_clcd_enable,
 423         .setup          = cp_clcd_setup,
 424         .mmap           = versatile_clcd_mmap_dma,
 425         .remove         = versatile_clcd_remove_dma,
 426 };
 427
 428 static struct amba_device clcd_device = {
 429         .dev            = {
 430                 .init_name = "mb:c0",
 431                 .coherent_dma_mask = ~0,
 432                 .platform_data = &clcd_data,
 433         },
 434         .res            = {
 435                 .start  = INTCP_PA_CLCD_BASE,
 436                 .end    = INTCP_PA_CLCD_BASE + SZ_4K - 1,
 437                 .flags  = IORESOURCE_MEM,
 438         },
 439         .dma_mask       = ~0,
 440         .irq            = { IRQ_CP_CLCDCINT, NO_IRQ },
 441         .periphid       = 0,
 442 };
 443
 444 static struct amba_device *amba_devs[] __initdata = {
 445         &mmc_device,
 446         &aaci_device,
 447         &clcd_device,
 448 };
 449
 450 #define REFCOUNTER (__io_address(INTEGRATOR_HDR_BASE) + 0x28)
 451
 452 static void __init intcp_init_early(void)
 453 {
 454         clkdev_add_table(cp_lookups, ARRAY_SIZE(cp_lookups));
 455
 456         integrator_init_early();
 457
 458 #ifdef CONFIG_PLAT_VERSATILE_SCHED_CLOCK
 459         versatile_sched_clock_init(REFCOUNTER, 24000000);
 460 #endif
 461 }
 462
 463 static void __init intcp_init(void)
 464 {
 465         int i;
 466
 467         platform_add_devices(intcp_devs, ARRAY_SIZE(intcp_devs));
 468
 469         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 470                 struct amba_device *d = amba_devs[i];
 471                 amba_device_register(d, &iomem_resource);
 472         }
 473 }
 474
 475 #define TIMER0_VA_BASE __io_address(INTEGRATOR_TIMER0_BASE)
 476 #define TIMER1_VA_BASE __io_address(INTEGRATOR_TIMER1_BASE)
 477 #define TIMER2_VA_BASE __io_address(INTEGRATOR_TIMER2_BASE)
 478
 479 static void __init intcp_timer_init(void)
 480 {
 481         writel(0, TIMER0_VA_BASE + TIMER_CTRL);
 482         writel(0, TIMER1_VA_BASE + TIMER_CTRL);
 483         writel(0, TIMER2_VA_BASE + TIMER_CTRL);
 484
 485         sp804_clocksource_init(TIMER2_VA_BASE, "timer2");
 486         sp804_clockevents_init(TIMER1_VA_BASE, IRQ_TIMERINT1, "timer1");
 487 }
 488
 489 static struct sys_timer cp_timer = {
 490         .init           = intcp_timer_init,
 491 };
 492
 493 MACHINE_START(CINTEGRATOR, "ARM-IntegratorCP")
 494         /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
 495         .atag_offset    = 0x100,
 496         .reserve        = integrator_reserve,
 497         .map_io         = intcp_map_io,
 498         .init_early     = intcp_init_early,
 499         .init_irq       = intcp_init_irq,
 500         .timer          = &cp_timer,
 501         .init_machine   = intcp_init,
 502 MACHINE_END