arch/arm/mach-integrator/impd1.c

   1 /*
   2  *  linux/arch/arm/mach-integrator/impd1.c
   3  *
   4  *  Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
   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 version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  *  This file provides the core support for the IM-PD1 module.
  11  *
  12  * Module / boot parameters.
  13  *   lmid=n   impd1.lmid=n - set the logic module position in stack to 'n'
  14  */
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/init.h>
  18 #include <linux/device.h>
  19 #include <linux/errno.h>
  20 #include <linux/mm.h>
  21 #include <linux/amba/bus.h>
  22 #include <linux/amba/clcd.h>
  23 #include <linux/io.h>
  24
  25 #include <asm/clkdev.h>
  26 #include <mach/clkdev.h>
  27 #include <asm/hardware/icst525.h>
  28 #include <mach/lm.h>
  29 #include <mach/impd1.h>
  30 #include <asm/sizes.h>
  31
  32 static int module_id;
  33
  34 module_param_named(lmid, module_id, int, 0444);
  35 MODULE_PARM_DESC(lmid, "logic module stack position");
  36
  37 struct impd1_module {
  38         void __iomem    *base;
  39         struct clk      vcos[2];
  40         struct clk_lookup *clks[3];
  41 };
  42
  43 static const struct icst_params impd1_vco_params = {
  44         .ref            = 24000000,     /* 24 MHz */
  45         .vco_max        = ICST525_VCO_MAX_3V,
  46         .vco_min        = ICST525_VCO_MIN,
  47         .vd_min         = 12,
  48         .vd_max         = 519,
  49         .rd_min         = 3,
  50         .rd_max         = 120,
  51         .s2div          = icst525_s2div,
  52         .idx2s          = icst525_idx2s,
  53 };
  54
  55 static void impd1_setvco(struct clk *clk, struct icst_vco vco)
  56 {
  57         struct impd1_module *impd1 = clk->data;
  58         int vconr = clk - impd1->vcos;
  59         u32 val;
  60
  61         val = vco.v | (vco.r << 9) | (vco.s << 16);
  62
  63         writel(0xa05f, impd1->base + IMPD1_LOCK);
  64         switch (vconr) {
  65         case 0:
  66                 writel(val, impd1->base + IMPD1_OSC1);
  67                 break;
  68         case 1:
  69                 writel(val, impd1->base + IMPD1_OSC2);
  70                 break;
  71         }
  72         writel(0, impd1->base + IMPD1_LOCK);
  73
  74 #ifdef DEBUG
  75         vco.v = val & 0x1ff;
  76         vco.r = (val >> 9) & 0x7f;
  77         vco.s = (val >> 16) & 7;
  78
  79         pr_debug("IM-PD1: VCO%d clock is %ld Hz\n",
  80                  vconr, icst525_hz(&impd1_vco_params, vco));
  81 #endif
  82 }
  83
  84 void impd1_tweak_control(struct device *dev, u32 mask, u32 val)
  85 {
  86         struct impd1_module *impd1 = dev_get_drvdata(dev);
  87         u32 cur;
  88
  89         val &= mask;
  90         cur = readl(impd1->base + IMPD1_CTRL) & ~mask;
  91         writel(cur | val, impd1->base + IMPD1_CTRL);
  92 }
  93
  94 EXPORT_SYMBOL(impd1_tweak_control);
  95
  96 /*
  97  * CLCD support
  98  */
  99 #define PANEL           PROSPECTOR
 100
 101 #define LTM10C209               1
 102 #define PROSPECTOR              2
 103 #define SVGA                    3
 104 #define VGA                     4
 105
 106 #if PANEL == VGA
 107 #define PANELTYPE       vga
 108 static struct clcd_panel vga = {
 109         .mode           = {
 110                 .name           = "VGA",
 111                 .refresh        = 60,
 112                 .xres           = 640,
 113                 .yres           = 480,
 114                 .pixclock       = 39721,
 115                 .left_margin    = 40,
 116                 .right_margin   = 24,
 117                 .upper_margin   = 32,
 118                 .lower_margin   = 11,
 119                 .hsync_len      = 96,
 120                 .vsync_len      = 2,
 121                 .sync           = 0,
 122                 .vmode          = FB_VMODE_NONINTERLACED,
 123         },
 124         .width          = -1,
 125         .height         = -1,
 126         .tim2           = TIM2_BCD | TIM2_IPC,
 127         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 128         .connector      = IMPD1_CTRL_DISP_VGA,
 129         .bpp            = 16,
 130         .grayscale      = 0,
 131 };
 132
 133 #elif PANEL == SVGA
 134 #define PANELTYPE       svga
 135 static struct clcd_panel svga = {
 136         .mode           = {
 137                 .name           = "SVGA",
 138                 .refresh        = 0,
 139                 .xres           = 800,
 140                 .yres           = 600,
 141                 .pixclock       = 27778,
 142                 .left_margin    = 20,
 143                 .right_margin   = 20,
 144                 .upper_margin   = 5,
 145                 .lower_margin   = 5,
 146                 .hsync_len      = 164,
 147                 .vsync_len      = 62,
 148                 .sync           = 0,
 149                 .vmode          = FB_VMODE_NONINTERLACED,
 150         },
 151         .width          = -1,
 152         .height         = -1,
 153         .tim2           = TIM2_BCD,
 154         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 155         .connector      = IMPD1_CTRL_DISP_VGA,
 156         .bpp            = 16,
 157         .grayscale      = 0,
 158 };
 159
 160 #elif PANEL == PROSPECTOR
 161 #define PANELTYPE       prospector
 162 static struct clcd_panel prospector = {
 163         .mode           = {
 164                 .name           = "PROSPECTOR",
 165                 .refresh        = 0,
 166                 .xres           = 640,
 167                 .yres           = 480,
 168                 .pixclock       = 40000,
 169                 .left_margin    = 33,
 170                 .right_margin   = 64,
 171                 .upper_margin   = 36,
 172                 .lower_margin   = 7,
 173                 .hsync_len      = 64,
 174                 .vsync_len      = 25,
 175                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 176                 .vmode          = FB_VMODE_NONINTERLACED,
 177         },
 178         .width          = -1,
 179         .height         = -1,
 180         .tim2           = TIM2_BCD,
 181         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 182         .fixedtimings   = 1,
 183         .connector      = IMPD1_CTRL_DISP_LCD,
 184         .bpp            = 16,
 185         .grayscale      = 0,
 186 };
 187
 188 #elif PANEL == LTM10C209
 189 #define PANELTYPE       ltm10c209
 190 /*
 191  * Untested.
 192  */
 193 static struct clcd_panel ltm10c209 = {
 194         .mode           = {
 195                 .name           = "LTM10C209",
 196                 .refresh        = 0,
 197                 .xres           = 640,
 198                 .yres           = 480,
 199                 .pixclock       = 40000,
 200                 .left_margin    = 20,
 201                 .right_margin   = 20,
 202                 .upper_margin   = 19,
 203                 .lower_margin   = 19,
 204                 .hsync_len      = 20,
 205                 .vsync_len      = 10,
 206                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 207                 .vmode          = FB_VMODE_NONINTERLACED,
 208         },
 209         .width          = -1,
 210         .height         = -1,
 211         .tim2           = TIM2_BCD,
 212         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 213         .fixedtimings   = 1,
 214         .connector      = IMPD1_CTRL_DISP_LCD,
 215         .bpp            = 16,
 216         .grayscale      = 0,
 217 };
 218 #endif
 219
 220 /*
 221  * Disable all display connectors on the interface module.
 222  */
 223 static void impd1fb_clcd_disable(struct clcd_fb *fb)
 224 {
 225         impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK, 0);
 226 }
 227
 228 /*
 229  * Enable the relevant connector on the interface module.
 230  */
 231 static void impd1fb_clcd_enable(struct clcd_fb *fb)
 232 {
 233         impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK,
 234                         fb->panel->connector | IMPD1_CTRL_DISP_ENABLE);
 235 }
 236
 237 static int impd1fb_clcd_setup(struct clcd_fb *fb)
 238 {
 239         unsigned long framebase = fb->dev->res.start + 0x01000000;
 240         unsigned long framesize = SZ_1M;
 241         int ret = 0;
 242
 243         fb->panel = &PANELTYPE;
 244
 245         if (!request_mem_region(framebase, framesize, "clcd framebuffer")) {
 246                 printk(KERN_ERR "IM-PD1: unable to reserve framebuffer\n");
 247                 return -EBUSY;
 248         }
 249
 250         fb->fb.screen_base = ioremap(framebase, framesize);
 251         if (!fb->fb.screen_base) {
 252                 printk(KERN_ERR "IM-PD1: unable to map framebuffer\n");
 253                 ret = -ENOMEM;
 254                 goto free_buffer;
 255         }
 256
 257         fb->fb.fix.smem_start   = framebase;
 258         fb->fb.fix.smem_len     = framesize;
 259
 260         return 0;
 261
 262  free_buffer:
 263         release_mem_region(framebase, framesize);
 264         return ret;
 265 }
 266
 267 static int impd1fb_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
 268 {
 269         unsigned long start, size;
 270
 271         start = vma->vm_pgoff + (fb->fb.fix.smem_start >> PAGE_SHIFT);
 272         size = vma->vm_end - vma->vm_start;
 273
 274         return remap_pfn_range(vma, vma->vm_start, start, size,
 275                                vma->vm_page_prot);
 276 }
 277
 278 static void impd1fb_clcd_remove(struct clcd_fb *fb)
 279 {
 280         iounmap(fb->fb.screen_base);
 281         release_mem_region(fb->fb.fix.smem_start, fb->fb.fix.smem_len);
 282 }
 283
 284 static struct clcd_board impd1_clcd_data = {
 285         .name           = "IM-PD/1",
 286         .check          = clcdfb_check,
 287         .decode         = clcdfb_decode,
 288         .disable        = impd1fb_clcd_disable,
 289         .enable         = impd1fb_clcd_enable,
 290         .setup          = impd1fb_clcd_setup,
 291         .mmap           = impd1fb_clcd_mmap,
 292         .remove         = impd1fb_clcd_remove,
 293 };
 294
 295 struct impd1_device {
 296         unsigned long   offset;
 297         unsigned int    irq[2];
 298         unsigned int    id;
 299         void            *platform_data;
 300 };
 301
 302 static struct impd1_device impd1_devs[] = {
 303         {
 304                 .offset = 0x03000000,
 305                 .id     = 0x00041190,
 306         }, {
 307                 .offset = 0x00100000,
 308                 .irq    = { 1 },
 309                 .id     = 0x00141011,
 310         }, {
 311                 .offset = 0x00200000,
 312                 .irq    = { 2 },
 313                 .id     = 0x00141011,
 314         }, {
 315                 .offset = 0x00300000,
 316                 .irq    = { 3 },
 317                 .id     = 0x00041022,
 318         }, {
 319                 .offset = 0x00400000,
 320                 .irq    = { 4 },
 321                 .id     = 0x00041061,
 322         }, {
 323                 .offset = 0x00500000,
 324                 .irq    = { 5 },
 325                 .id     = 0x00041061,
 326         }, {
 327                 .offset = 0x00600000,
 328                 .irq    = { 6 },
 329                 .id     = 0x00041130,
 330         }, {
 331                 .offset = 0x00700000,
 332                 .irq    = { 7, 8 },
 333                 .id     = 0x00041181,
 334         }, {
 335                 .offset = 0x00800000,
 336                 .irq    = { 9 },
 337                 .id     = 0x00041041,
 338         }, {
 339                 .offset = 0x01000000,
 340                 .irq    = { 11 },
 341                 .id     = 0x00041110,
 342                 .platform_data = &impd1_clcd_data,
 343         }
 344 };
 345
 346 static struct clk fixed_14745600 = {
 347         .rate = 14745600,
 348 };
 349
 350 static int impd1_probe(struct lm_device *dev)
 351 {
 352         struct impd1_module *impd1;
 353         int i, ret;
 354
 355         if (dev->id != module_id)
 356                 return -EINVAL;
 357
 358         if (!request_mem_region(dev->resource.start, SZ_4K, "LM registers"))
 359                 return -EBUSY;
 360
 361         impd1 = kzalloc(sizeof(struct impd1_module), GFP_KERNEL);
 362         if (!impd1) {
 363                 ret = -ENOMEM;
 364                 goto release_lm;
 365         }
 366
 367         impd1->base = ioremap(dev->resource.start, SZ_4K);
 368         if (!impd1->base) {
 369                 ret = -ENOMEM;
 370                 goto free_impd1;
 371         }
 372
 373         lm_set_drvdata(dev, impd1);
 374
 375         printk("IM-PD1 found at 0x%08lx\n",
 376                 (unsigned long)dev->resource.start);
 377
 378         for (i = 0; i < ARRAY_SIZE(impd1->vcos); i++) {
 379                 impd1->vcos[i].owner = THIS_MODULE,
 380                 impd1->vcos[i].params = &impd1_vco_params,
 381                 impd1->vcos[i].data = impd1,
 382                 impd1->vcos[i].setvco = impd1_setvco;
 383         }
 384
 385         impd1->clks[0] = clkdev_alloc(&impd1->vcos[0], NULL, "lm%x:01000",
 386                                         dev->id);
 387         impd1->clks[1] = clkdev_alloc(&fixed_14745600, NULL, "lm%x:00100",
 388                                         dev->id);
 389         impd1->clks[2] = clkdev_alloc(&fixed_14745600, NULL, "lm%x:00200",
 390                                         dev->id);
 391         for (i = 0; i < ARRAY_SIZE(impd1->clks); i++)
 392                 clkdev_add(impd1->clks[i]);
 393
 394         for (i = 0; i < ARRAY_SIZE(impd1_devs); i++) {
 395                 struct impd1_device *idev = impd1_devs + i;
 396                 struct amba_device *d;
 397                 unsigned long pc_base;
 398
 399                 pc_base = dev->resource.start + idev->offset;
 400
 401                 d = kzalloc(sizeof(struct amba_device), GFP_KERNEL);
 402                 if (!d)
 403                         continue;
 404
 405                 dev_set_name(&d->dev, "lm%x:%5.5lx", dev->id, idev->offset >> 12);
 406                 d->dev.parent   = &dev->dev;
 407                 d->res.start    = dev->resource.start + idev->offset;
 408                 d->res.end      = d->res.start + SZ_4K - 1;
 409                 d->res.flags    = IORESOURCE_MEM;
 410                 d->irq[0]       = dev->irq;
 411                 d->irq[1]       = dev->irq;
 412                 d->periphid     = idev->id;
 413                 d->dev.platform_data = idev->platform_data;
 414
 415                 ret = amba_device_register(d, &dev->resource);
 416                 if (ret) {
 417                         dev_err(&d->dev, "unable to register device: %d\n", ret);
 418                         kfree(d);
 419                 }
 420         }
 421
 422         return 0;
 423
 424  free_impd1:
 425         if (impd1 && impd1->base)
 426                 iounmap(impd1->base);
 427         kfree(impd1);
 428  release_lm:
 429         release_mem_region(dev->resource.start, SZ_4K);
 430         return ret;
 431 }
 432
 433 static int impd1_remove_one(struct device *dev, void *data)
 434 {
 435         device_unregister(dev);
 436         return 0;
 437 }
 438
 439 static void impd1_remove(struct lm_device *dev)
 440 {
 441         struct impd1_module *impd1 = lm_get_drvdata(dev);
 442         int i;
 443
 444         device_for_each_child(&dev->dev, NULL, impd1_remove_one);
 445
 446         for (i = 0; i < ARRAY_SIZE(impd1->clks); i++)
 447                 clkdev_drop(impd1->clks[i]);
 448
 449         lm_set_drvdata(dev, NULL);
 450
 451         iounmap(impd1->base);
 452         kfree(impd1);
 453         release_mem_region(dev->resource.start, SZ_4K);
 454 }
 455
 456 static struct lm_driver impd1_driver = {
 457         .drv = {
 458                 .name   = "impd1",
 459         },
 460         .probe          = impd1_probe,
 461         .remove         = impd1_remove,
 462 };
 463
 464 static int __init impd1_init(void)
 465 {
 466         return lm_driver_register(&impd1_driver);
 467 }
 468
 469 static void __exit impd1_exit(void)
 470 {
 471         lm_driver_unregister(&impd1_driver);
 472 }
 473
 474 module_init(impd1_init);
 475 module_exit(impd1_exit);
 476
 477 MODULE_LICENSE("GPL");
 478 MODULE_DESCRIPTION("Integrator/IM-PD1 logic module core driver");
 479 MODULE_AUTHOR("Deep Blue Solutions Ltd");