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   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/slab.h>
  17 #include <linux/string.h>
  18 #include <linux/sysdev.h>
  19 #include <linux/amba/bus.h>
  20 #include <linux/amba/kmi.h>
  21 #include <linux/amba/clcd.h>
  22
  23 #include <asm/hardware.h>
  24 #include <asm/io.h>
  25 #include <asm/irq.h>
  26 #include <asm/setup.h>
  27 #include <asm/mach-types.h>
  28 #include <asm/hardware/icst525.h>
  29
  30 #include <asm/arch/cm.h>
  31 #include <asm/arch/lm.h>
  32
  33 #include <asm/mach/arch.h>
  34 #include <asm/mach/flash.h>
  35 #include <asm/mach/irq.h>
  36 #include <asm/mach/mmc.h>
  37 #include <asm/mach/map.h>
  38 #include <asm/mach/time.h>
  39
  40 #include "common.h"
  41 #include "clock.h"
  42
  43 #define INTCP_PA_MMC_BASE               0x1c000000
  44 #define INTCP_PA_AACI_BASE              0x1d000000
  45
  46 #define INTCP_PA_FLASH_BASE             0x24000000
  47 #define INTCP_FLASH_SIZE                SZ_32M
  48
  49 #define INTCP_PA_CLCD_BASE              0xc0000000
  50
  51 #define INTCP_VA_CIC_BASE               0xf1000040
  52 #define INTCP_VA_PIC_BASE               0xf1400000
  53 #define INTCP_VA_SIC_BASE               0xfca00000
  54
  55 #define INTCP_PA_ETH_BASE               0xc8000000
  56 #define INTCP_ETH_SIZE                  0x10
  57
  58 #define INTCP_VA_CTRL_BASE              0xfcb00000
  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  * f1b00000     1b000000        GPIO
  74  */
  75
  76 static struct map_desc intcp_io_desc[] __initdata = {
  77         {
  78                 .virtual        = IO_ADDRESS(INTEGRATOR_HDR_BASE),
  79                 .pfn            = __phys_to_pfn(INTEGRATOR_HDR_BASE),
  80                 .length         = SZ_4K,
  81                 .type           = MT_DEVICE
  82         }, {
  83                 .virtual        = IO_ADDRESS(INTEGRATOR_SC_BASE),
  84                 .pfn            = __phys_to_pfn(INTEGRATOR_SC_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_UART1_BASE),
 109                 .pfn            = __phys_to_pfn(INTEGRATOR_UART1_BASE),
 110                 .length         = SZ_4K,
 111                 .type           = MT_DEVICE
 112         }, {
 113                 .virtual        = IO_ADDRESS(INTEGRATOR_DBG_BASE),
 114                 .pfn            = __phys_to_pfn(INTEGRATOR_DBG_BASE),
 115                 .length         = SZ_4K,
 116                 .type           = MT_DEVICE
 117         }, {
 118                 .virtual        = IO_ADDRESS(INTEGRATOR_GPIO_BASE),
 119                 .pfn            = __phys_to_pfn(INTEGRATOR_GPIO_BASE),
 120                 .length         = SZ_4K,
 121                 .type           = MT_DEVICE
 122         }, {
 123                 .virtual        = 0xfca00000,
 124                 .pfn            = __phys_to_pfn(0xca000000),
 125                 .length         = SZ_4K,
 126                 .type           = MT_DEVICE
 127         }, {
 128                 .virtual        = 0xfcb00000,
 129                 .pfn            = __phys_to_pfn(0xcb000000),
 130                 .length         = SZ_4K,
 131                 .type           = MT_DEVICE
 132         }
 133 };
 134
 135 static void __init intcp_map_io(void)
 136 {
 137         iotable_init(intcp_io_desc, ARRAY_SIZE(intcp_io_desc));
 138 }
 139
 140 #define cic_writel      __raw_writel
 141 #define cic_readl       __raw_readl
 142 #define pic_writel      __raw_writel
 143 #define pic_readl       __raw_readl
 144 #define sic_writel      __raw_writel
 145 #define sic_readl       __raw_readl
 146
 147 static void cic_mask_irq(unsigned int irq)
 148 {
 149         irq -= IRQ_CIC_START;
 150         cic_writel(1 << irq, INTCP_VA_CIC_BASE + IRQ_ENABLE_CLEAR);
 151 }
 152
 153 static void cic_unmask_irq(unsigned int irq)
 154 {
 155         irq -= IRQ_CIC_START;
 156         cic_writel(1 << irq, INTCP_VA_CIC_BASE + IRQ_ENABLE_SET);
 157 }
 158
 159 static struct irq_chip cic_chip = {
 160         .name   = "CIC",
 161         .ack    = cic_mask_irq,
 162         .mask   = cic_mask_irq,
 163         .unmask = cic_unmask_irq,
 164 };
 165
 166 static void pic_mask_irq(unsigned int irq)
 167 {
 168         irq -= IRQ_PIC_START;
 169         pic_writel(1 << irq, INTCP_VA_PIC_BASE + IRQ_ENABLE_CLEAR);
 170 }
 171
 172 static void pic_unmask_irq(unsigned int irq)
 173 {
 174         irq -= IRQ_PIC_START;
 175         pic_writel(1 << irq, INTCP_VA_PIC_BASE + IRQ_ENABLE_SET);
 176 }
 177
 178 static struct irq_chip pic_chip = {
 179         .name   = "PIC",
 180         .ack    = pic_mask_irq,
 181         .mask   = pic_mask_irq,
 182         .unmask = pic_unmask_irq,
 183 };
 184
 185 static void sic_mask_irq(unsigned int irq)
 186 {
 187         irq -= IRQ_SIC_START;
 188         sic_writel(1 << irq, INTCP_VA_SIC_BASE + IRQ_ENABLE_CLEAR);
 189 }
 190
 191 static void sic_unmask_irq(unsigned int irq)
 192 {
 193         irq -= IRQ_SIC_START;
 194         sic_writel(1 << irq, INTCP_VA_SIC_BASE + IRQ_ENABLE_SET);
 195 }
 196
 197 static struct irq_chip sic_chip = {
 198         .name   = "SIC",
 199         .ack    = sic_mask_irq,
 200         .mask   = sic_mask_irq,
 201         .unmask = sic_unmask_irq,
 202 };
 203
 204 static void
 205 sic_handle_irq(unsigned int irq, struct irq_desc *desc)
 206 {
 207         unsigned long status = sic_readl(INTCP_VA_SIC_BASE + IRQ_STATUS);
 208
 209         if (status == 0) {
 210                 do_bad_IRQ(irq, desc);
 211                 return;
 212         }
 213
 214         do {
 215                 irq = ffs(status) - 1;
 216                 status &= ~(1 << irq);
 217
 218                 irq += IRQ_SIC_START;
 219
 220                 desc = irq_desc + irq;
 221                 desc_handle_irq(irq, desc);
 222         } while (status);
 223 }
 224
 225 static void __init intcp_init_irq(void)
 226 {
 227         unsigned int i;
 228
 229         /*
 230          * Disable all interrupt sources
 231          */
 232         pic_writel(0xffffffff, INTCP_VA_PIC_BASE + IRQ_ENABLE_CLEAR);
 233         pic_writel(0xffffffff, INTCP_VA_PIC_BASE + FIQ_ENABLE_CLEAR);
 234
 235         for (i = IRQ_PIC_START; i <= IRQ_PIC_END; i++) {
 236                 if (i == 11)
 237                         i = 22;
 238                 if (i == 29)
 239                         break;
 240                 set_irq_chip(i, &pic_chip);
 241                 set_irq_handler(i, handle_level_irq);
 242                 set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
 243         }
 244
 245         cic_writel(0xffffffff, INTCP_VA_CIC_BASE + IRQ_ENABLE_CLEAR);
 246         cic_writel(0xffffffff, INTCP_VA_CIC_BASE + FIQ_ENABLE_CLEAR);
 247
 248         for (i = IRQ_CIC_START; i <= IRQ_CIC_END; i++) {
 249                 set_irq_chip(i, &cic_chip);
 250                 set_irq_handler(i, handle_level_irq);
 251                 set_irq_flags(i, IRQF_VALID);
 252         }
 253
 254         sic_writel(0x00000fff, INTCP_VA_SIC_BASE + IRQ_ENABLE_CLEAR);
 255         sic_writel(0x00000fff, INTCP_VA_SIC_BASE + FIQ_ENABLE_CLEAR);
 256
 257         for (i = IRQ_SIC_START; i <= IRQ_SIC_END; i++) {
 258                 set_irq_chip(i, &sic_chip);
 259                 set_irq_handler(i, handle_level_irq);
 260                 set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
 261         }
 262
 263         set_irq_chained_handler(IRQ_CP_CPPLDINT, sic_handle_irq);
 264 }
 265
 266 /*
 267  * Clock handling
 268  */
 269 #define CM_LOCK (IO_ADDRESS(INTEGRATOR_HDR_BASE)+INTEGRATOR_HDR_LOCK_OFFSET)
 270 #define CM_AUXOSC (IO_ADDRESS(INTEGRATOR_HDR_BASE)+0x1c)
 271
 272 static const struct icst525_params cp_auxvco_params = {
 273         .ref            = 24000,
 274         .vco_max        = 320000,
 275         .vd_min         = 8,
 276         .vd_max         = 263,
 277         .rd_min         = 3,
 278         .rd_max         = 65,
 279 };
 280
 281 static void cp_auxvco_set(struct clk *clk, struct icst525_vco vco)
 282 {
 283         u32 val;
 284
 285         val = readl(CM_AUXOSC) & ~0x7ffff;
 286         val |= vco.v | (vco.r << 9) | (vco.s << 16);
 287
 288         writel(0xa05f, CM_LOCK);
 289         writel(val, CM_AUXOSC);
 290         writel(0, CM_LOCK);
 291 }
 292
 293 static struct clk cp_clcd_clk = {
 294         .name   = "CLCDCLK",
 295         .params = &cp_auxvco_params,
 296         .setvco = cp_auxvco_set,
 297 };
 298
 299 static struct clk cp_mmci_clk = {
 300         .name   = "MCLK",
 301         .rate   = 14745600,
 302 };
 303
 304 /*
 305  * Flash handling.
 306  */
 307 static int intcp_flash_init(void)
 308 {
 309         u32 val;
 310
 311         val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
 312         val |= CINTEGRATOR_FLASHPROG_FLWREN;
 313         writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
 314
 315         return 0;
 316 }
 317
 318 static void intcp_flash_exit(void)
 319 {
 320         u32 val;
 321
 322         val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
 323         val &= ~(CINTEGRATOR_FLASHPROG_FLVPPEN|CINTEGRATOR_FLASHPROG_FLWREN);
 324         writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
 325 }
 326
 327 static void intcp_flash_set_vpp(int on)
 328 {
 329         u32 val;
 330
 331         val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
 332         if (on)
 333                 val |= CINTEGRATOR_FLASHPROG_FLVPPEN;
 334         else
 335                 val &= ~CINTEGRATOR_FLASHPROG_FLVPPEN;
 336         writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
 337 }
 338
 339 static struct flash_platform_data intcp_flash_data = {
 340         .map_name       = "cfi_probe",
 341         .width          = 4,
 342         .init           = intcp_flash_init,
 343         .exit           = intcp_flash_exit,
 344         .set_vpp        = intcp_flash_set_vpp,
 345 };
 346
 347 static struct resource intcp_flash_resource = {
 348         .start          = INTCP_PA_FLASH_BASE,
 349         .end            = INTCP_PA_FLASH_BASE + INTCP_FLASH_SIZE - 1,
 350         .flags          = IORESOURCE_MEM,
 351 };
 352
 353 static struct platform_device intcp_flash_device = {
 354         .name           = "armflash",
 355         .id             = 0,
 356         .dev            = {
 357                 .platform_data  = &intcp_flash_data,
 358         },
 359         .num_resources  = 1,
 360         .resource       = &intcp_flash_resource,
 361 };
 362
 363 static struct resource smc91x_resources[] = {
 364         [0] = {
 365                 .start  = INTCP_PA_ETH_BASE,
 366                 .end    = INTCP_PA_ETH_BASE + INTCP_ETH_SIZE - 1,
 367                 .flags  = IORESOURCE_MEM,
 368         },
 369         [1] = {
 370                 .start  = IRQ_CP_ETHINT,
 371                 .end    = IRQ_CP_ETHINT,
 372                 .flags  = IORESOURCE_IRQ,
 373         },
 374 };
 375
 376 static struct platform_device smc91x_device = {
 377         .name           = "smc91x",
 378         .id             = 0,
 379         .num_resources  = ARRAY_SIZE(smc91x_resources),
 380         .resource       = smc91x_resources,
 381 };
 382
 383 static struct platform_device *intcp_devs[] __initdata = {
 384         &intcp_flash_device,
 385         &smc91x_device,
 386 };
 387
 388 /*
 389  * It seems that the card insertion interrupt remains active after
 390  * we've acknowledged it.  We therefore ignore the interrupt, and
 391  * rely on reading it from the SIC.  This also means that we must
 392  * clear the latched interrupt.
 393  */
 394 static unsigned int mmc_status(struct device *dev)
 395 {
 396         unsigned int status = readl(0xfca00004);
 397         writel(8, 0xfcb00008);
 398
 399         return status & 8;
 400 }
 401
 402 static struct mmc_platform_data mmc_data = {
 403         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 404         .status         = mmc_status,
 405 };
 406
 407 static struct amba_device mmc_device = {
 408         .dev            = {
 409                 .bus_id = "mb:1c",
 410                 .platform_data = &mmc_data,
 411         },
 412         .res            = {
 413                 .start  = INTCP_PA_MMC_BASE,
 414                 .end    = INTCP_PA_MMC_BASE + SZ_4K - 1,
 415                 .flags  = IORESOURCE_MEM,
 416         },
 417         .irq            = { IRQ_CP_MMCIINT0, IRQ_CP_MMCIINT1 },
 418         .periphid       = 0,
 419 };
 420
 421 static struct amba_device aaci_device = {
 422         .dev            = {
 423                 .bus_id = "mb:1d",
 424         },
 425         .res            = {
 426                 .start  = INTCP_PA_AACI_BASE,
 427                 .end    = INTCP_PA_AACI_BASE + SZ_4K - 1,
 428                 .flags  = IORESOURCE_MEM,
 429         },
 430         .irq            = { IRQ_CP_AACIINT, NO_IRQ },
 431         .periphid       = 0,
 432 };
 433
 434
 435 /*
 436  * CLCD support
 437  */
 438 static struct clcd_panel vga = {
 439         .mode           = {
 440                 .name           = "VGA",
 441                 .refresh        = 60,
 442                 .xres           = 640,
 443                 .yres           = 480,
 444                 .pixclock       = 39721,
 445                 .left_margin    = 40,
 446                 .right_margin   = 24,
 447                 .upper_margin   = 32,
 448                 .lower_margin   = 11,
 449                 .hsync_len      = 96,
 450                 .vsync_len      = 2,
 451                 .sync           = 0,
 452                 .vmode          = FB_VMODE_NONINTERLACED,
 453         },
 454         .width          = -1,
 455         .height         = -1,
 456         .tim2           = TIM2_BCD | TIM2_IPC,
 457         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 458         .bpp            = 16,
 459         .grayscale      = 0,
 460 };
 461
 462 /*
 463  * Ensure VGA is selected.
 464  */
 465 static void cp_clcd_enable(struct clcd_fb *fb)
 466 {
 467         u32 val;
 468
 469         if (fb->fb.var.bits_per_pixel <= 8)
 470                 val = CM_CTRL_LCDMUXSEL_VGA_8421BPP;
 471         else if (fb->fb.var.bits_per_pixel <= 16)
 472                 val = CM_CTRL_LCDMUXSEL_VGA_16BPP
 473                         | CM_CTRL_LCDEN0 | CM_CTRL_LCDEN1
 474                         | CM_CTRL_STATIC1 | CM_CTRL_STATIC2;
 475         else
 476                 val = 0; /* no idea for this, don't trust the docs */
 477
 478         cm_control(CM_CTRL_LCDMUXSEL_MASK|
 479                    CM_CTRL_LCDEN0|
 480                    CM_CTRL_LCDEN1|
 481                    CM_CTRL_STATIC1|
 482                    CM_CTRL_STATIC2|
 483                    CM_CTRL_STATIC|
 484                    CM_CTRL_n24BITEN, val);
 485 }
 486
 487 static unsigned long framesize = SZ_1M;
 488
 489 static int cp_clcd_setup(struct clcd_fb *fb)
 490 {
 491         dma_addr_t dma;
 492
 493         fb->panel = &vga;
 494
 495         fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, framesize,
 496                                                     &dma, GFP_KERNEL);
 497         if (!fb->fb.screen_base) {
 498                 printk(KERN_ERR "CLCD: unable to map framebuffer\n");
 499                 return -ENOMEM;
 500         }
 501
 502         fb->fb.fix.smem_start   = dma;
 503         fb->fb.fix.smem_len     = framesize;
 504
 505         return 0;
 506 }
 507
 508 static int cp_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
 509 {
 510         return dma_mmap_writecombine(&fb->dev->dev, vma,
 511                                      fb->fb.screen_base,
 512                                      fb->fb.fix.smem_start,
 513                                      fb->fb.fix.smem_len);
 514 }
 515
 516 static void cp_clcd_remove(struct clcd_fb *fb)
 517 {
 518         dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
 519                               fb->fb.screen_base, fb->fb.fix.smem_start);
 520 }
 521
 522 static struct clcd_board clcd_data = {
 523         .name           = "Integrator/CP",
 524         .check          = clcdfb_check,
 525         .decode         = clcdfb_decode,
 526         .enable         = cp_clcd_enable,
 527         .setup          = cp_clcd_setup,
 528         .mmap           = cp_clcd_mmap,
 529         .remove         = cp_clcd_remove,
 530 };
 531
 532 static struct amba_device clcd_device = {
 533         .dev            = {
 534                 .bus_id = "mb:c0",
 535                 .coherent_dma_mask = ~0,
 536                 .platform_data = &clcd_data,
 537         },
 538         .res            = {
 539                 .start  = INTCP_PA_CLCD_BASE,
 540                 .end    = INTCP_PA_CLCD_BASE + SZ_4K - 1,
 541                 .flags  = IORESOURCE_MEM,
 542         },
 543         .dma_mask       = ~0,
 544         .irq            = { IRQ_CP_CLCDCINT, NO_IRQ },
 545         .periphid       = 0,
 546 };
 547
 548 static struct amba_device *amba_devs[] __initdata = {
 549         &mmc_device,
 550         &aaci_device,
 551         &clcd_device,
 552 };
 553
 554 static void __init intcp_init(void)
 555 {
 556         int i;
 557
 558         clk_register(&cp_clcd_clk);
 559         clk_register(&cp_mmci_clk);
 560
 561         platform_add_devices(intcp_devs, ARRAY_SIZE(intcp_devs));
 562
 563         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 564                 struct amba_device *d = amba_devs[i];
 565                 amba_device_register(d, &iomem_resource);
 566         }
 567 }
 568
 569 #define TIMER_CTRL_IE   (1 << 5)                        /* Interrupt Enable */
 570
 571 static void __init intcp_timer_init(void)
 572 {
 573         integrator_time_init(1000000 / HZ, TIMER_CTRL_IE);
 574 }
 575
 576 static struct sys_timer cp_timer = {
 577         .init           = intcp_timer_init,
 578         .offset         = integrator_gettimeoffset,
 579 };
 580
 581 MACHINE_START(CINTEGRATOR, "ARM-IntegratorCP")
 582         /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
 583         .phys_io        = 0x16000000,
 584         .io_pg_offst    = ((0xf1600000) >> 18) & 0xfffc,
 585         .boot_params    = 0x00000100,
 586         .map_io         = intcp_map_io,
 587         .init_irq       = intcp_init_irq,
 588         .timer          = &cp_timer,
 589         .init_machine   = intcp_init,
 590 MACHINE_END