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 #include <linux/slab.h>
  25 #include <linux/clkdev.h>
  26
  27 #include <asm/hardware/icst.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         u32 val = vco.v | (vco.r << 9) | (vco.s << 16);
  59
  60         writel(0xa05f, impd1->base + IMPD1_LOCK);
  61         writel(val, clk->vcoreg);
  62         writel(0, impd1->base + IMPD1_LOCK);
  63
  64 #ifdef DEBUG
  65         vco.v = val & 0x1ff;
  66         vco.r = (val >> 9) & 0x7f;
  67         vco.s = (val >> 16) & 7;
  68
  69         pr_debug("IM-PD1: VCO%d clock is %ld Hz\n",
  70                  vconr, icst525_hz(&impd1_vco_params, vco));
  71 #endif
  72 }
  73
  74 static const struct clk_ops impd1_clk_ops = {
  75         .round  = icst_clk_round,
  76         .set    = icst_clk_set,
  77         .setvco = impd1_setvco,
  78 };
  79
  80 void impd1_tweak_control(struct device *dev, u32 mask, u32 val)
  81 {
  82         struct impd1_module *impd1 = dev_get_drvdata(dev);
  83         u32 cur;
  84
  85         val &= mask;
  86         cur = readl(impd1->base + IMPD1_CTRL) & ~mask;
  87         writel(cur | val, impd1->base + IMPD1_CTRL);
  88 }
  89
  90 EXPORT_SYMBOL(impd1_tweak_control);
  91
  92 /*
  93  * CLCD support
  94  */
  95 #define PANEL           PROSPECTOR
  96
  97 #define LTM10C209               1
  98 #define PROSPECTOR              2
  99 #define SVGA                    3
 100 #define VGA                     4
 101
 102 #if PANEL == VGA
 103 #define PANELTYPE       vga
 104 static struct clcd_panel vga = {
 105         .mode           = {
 106                 .name           = "VGA",
 107                 .refresh        = 60,
 108                 .xres           = 640,
 109                 .yres           = 480,
 110                 .pixclock       = 39721,
 111                 .left_margin    = 40,
 112                 .right_margin   = 24,
 113                 .upper_margin   = 32,
 114                 .lower_margin   = 11,
 115                 .hsync_len      = 96,
 116                 .vsync_len      = 2,
 117                 .sync           = 0,
 118                 .vmode          = FB_VMODE_NONINTERLACED,
 119         },
 120         .width          = -1,
 121         .height         = -1,
 122         .tim2           = TIM2_BCD | TIM2_IPC,
 123         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 124         .caps           = CLCD_CAP_5551,
 125         .connector      = IMPD1_CTRL_DISP_VGA,
 126         .bpp            = 16,
 127         .grayscale      = 0,
 128 };
 129
 130 #elif PANEL == SVGA
 131 #define PANELTYPE       svga
 132 static struct clcd_panel svga = {
 133         .mode           = {
 134                 .name           = "SVGA",
 135                 .refresh        = 0,
 136                 .xres           = 800,
 137                 .yres           = 600,
 138                 .pixclock       = 27778,
 139                 .left_margin    = 20,
 140                 .right_margin   = 20,
 141                 .upper_margin   = 5,
 142                 .lower_margin   = 5,
 143                 .hsync_len      = 164,
 144                 .vsync_len      = 62,
 145                 .sync           = 0,
 146                 .vmode          = FB_VMODE_NONINTERLACED,
 147         },
 148         .width          = -1,
 149         .height         = -1,
 150         .tim2           = TIM2_BCD,
 151         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 152         .connector      = IMPD1_CTRL_DISP_VGA,
 153         .caps           = CLCD_CAP_5551,
 154         .bpp            = 16,
 155         .grayscale      = 0,
 156 };
 157
 158 #elif PANEL == PROSPECTOR
 159 #define PANELTYPE       prospector
 160 static struct clcd_panel prospector = {
 161         .mode           = {
 162                 .name           = "PROSPECTOR",
 163                 .refresh        = 0,
 164                 .xres           = 640,
 165                 .yres           = 480,
 166                 .pixclock       = 40000,
 167                 .left_margin    = 33,
 168                 .right_margin   = 64,
 169                 .upper_margin   = 36,
 170                 .lower_margin   = 7,
 171                 .hsync_len      = 64,
 172                 .vsync_len      = 25,
 173                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 174                 .vmode          = FB_VMODE_NONINTERLACED,
 175         },
 176         .width          = -1,
 177         .height         = -1,
 178         .tim2           = TIM2_BCD,
 179         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 180         .caps           = CLCD_CAP_5551,
 181         .fixedtimings   = 1,
 182         .connector      = IMPD1_CTRL_DISP_LCD,
 183         .bpp            = 16,
 184         .grayscale      = 0,
 185 };
 186
 187 #elif PANEL == LTM10C209
 188 #define PANELTYPE       ltm10c209
 189 /*
 190  * Untested.
 191  */
 192 static struct clcd_panel ltm10c209 = {
 193         .mode           = {
 194                 .name           = "LTM10C209",
 195                 .refresh        = 0,
 196                 .xres           = 640,
 197                 .yres           = 480,
 198                 .pixclock       = 40000,
 199                 .left_margin    = 20,
 200                 .right_margin   = 20,
 201                 .upper_margin   = 19,
 202                 .lower_margin   = 19,
 203                 .hsync_len      = 20,
 204                 .vsync_len      = 10,
 205                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 206                 .vmode          = FB_VMODE_NONINTERLACED,
 207         },
 208         .width          = -1,
 209         .height         = -1,
 210         .tim2           = TIM2_BCD,
 211         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 212         .caps           = CLCD_CAP_5551,
 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         .caps           = CLCD_CAP_5551 | CLCD_CAP_888,
 287         .check          = clcdfb_check,
 288         .decode         = clcdfb_decode,
 289         .disable        = impd1fb_clcd_disable,
 290         .enable         = impd1fb_clcd_enable,
 291         .setup          = impd1fb_clcd_setup,
 292         .mmap           = impd1fb_clcd_mmap,
 293         .remove         = impd1fb_clcd_remove,
 294 };
 295
 296 struct impd1_device {
 297         unsigned long   offset;
 298         unsigned int    irq[2];
 299         unsigned int    id;
 300         void            *platform_data;
 301 };
 302
 303 static struct impd1_device impd1_devs[] = {
 304         {
 305                 .offset = 0x03000000,
 306                 .id     = 0x00041190,
 307         }, {
 308                 .offset = 0x00100000,
 309                 .irq    = { 1 },
 310                 .id     = 0x00141011,
 311         }, {
 312                 .offset = 0x00200000,
 313                 .irq    = { 2 },
 314                 .id     = 0x00141011,
 315         }, {
 316                 .offset = 0x00300000,
 317                 .irq    = { 3 },
 318                 .id     = 0x00041022,
 319         }, {
 320                 .offset = 0x00400000,
 321                 .irq    = { 4 },
 322                 .id     = 0x00041061,
 323         }, {
 324                 .offset = 0x00500000,
 325                 .irq    = { 5 },
 326                 .id     = 0x00041061,
 327         }, {
 328                 .offset = 0x00600000,
 329                 .irq    = { 6 },
 330                 .id     = 0x00041130,
 331         }, {
 332                 .offset = 0x00700000,
 333                 .irq    = { 7, 8 },
 334                 .id     = 0x00041181,
 335         }, {
 336                 .offset = 0x00800000,
 337                 .irq    = { 9 },
 338                 .id     = 0x00041041,
 339         }, {
 340                 .offset = 0x01000000,
 341                 .irq    = { 11 },
 342                 .id     = 0x00041110,
 343                 .platform_data = &impd1_clcd_data,
 344         }
 345 };
 346
 347 static struct clk fixed_14745600 = {
 348         .rate = 14745600,
 349 };
 350
 351 static int impd1_probe(struct lm_device *dev)
 352 {
 353         struct impd1_module *impd1;
 354         int i, ret;
 355
 356         if (dev->id != module_id)
 357                 return -EINVAL;
 358
 359         if (!request_mem_region(dev->resource.start, SZ_4K, "LM registers"))
 360                 return -EBUSY;
 361
 362         impd1 = kzalloc(sizeof(struct impd1_module), GFP_KERNEL);
 363         if (!impd1) {
 364                 ret = -ENOMEM;
 365                 goto release_lm;
 366         }
 367
 368         impd1->base = ioremap(dev->resource.start, SZ_4K);
 369         if (!impd1->base) {
 370                 ret = -ENOMEM;
 371                 goto free_impd1;
 372         }
 373
 374         lm_set_drvdata(dev, impd1);
 375
 376         printk("IM-PD1 found at 0x%08lx\n",
 377                 (unsigned long)dev->resource.start);
 378
 379         for (i = 0; i < ARRAY_SIZE(impd1->vcos); i++) {
 380                 impd1->vcos[i].ops = &impd1_clk_ops,
 381                 impd1->vcos[i].owner = THIS_MODULE,
 382                 impd1->vcos[i].params = &impd1_vco_params,
 383                 impd1->vcos[i].data = impd1;
 384         }
 385         impd1->vcos[0].vcoreg = impd1->base + IMPD1_OSC1;
 386         impd1->vcos[1].vcoreg = impd1->base + IMPD1_OSC2;
 387
 388         impd1->clks[0] = clkdev_alloc(&impd1->vcos[0], NULL, "lm%x:01000",
 389                                         dev->id);
 390         impd1->clks[1] = clkdev_alloc(&fixed_14745600, NULL, "lm%x:00100",
 391                                         dev->id);
 392         impd1->clks[2] = clkdev_alloc(&fixed_14745600, NULL, "lm%x:00200",
 393                                         dev->id);
 394         for (i = 0; i < ARRAY_SIZE(impd1->clks); i++)
 395                 clkdev_add(impd1->clks[i]);
 396
 397         for (i = 0; i < ARRAY_SIZE(impd1_devs); i++) {
 398                 struct impd1_device *idev = impd1_devs + i;
 399                 struct amba_device *d;
 400                 unsigned long pc_base;
 401                 char devname[32];
 402
 403                 pc_base = dev->resource.start + idev->offset;
 404                 snprintf(devname, 32, "lm%x:%5.5lx", dev->id, idev->offset >> 12);
 405                 d = amba_ahb_device_add(&dev->dev, devname, pc_base, SZ_4K,
 406                                         dev->irq, dev->irq,
 407                                         idev->platform_data, idev->id);
 408                 if (IS_ERR(d)) {
 409                         dev_err(&dev->dev, "unable to register device: %ld\n", PTR_ERR(d));
 410                         continue;
 411                 }
 412         }
 413
 414         return 0;
 415
 416  free_impd1:
 417         if (impd1 && impd1->base)
 418                 iounmap(impd1->base);
 419         kfree(impd1);
 420  release_lm:
 421         release_mem_region(dev->resource.start, SZ_4K);
 422         return ret;
 423 }
 424
 425 static int impd1_remove_one(struct device *dev, void *data)
 426 {
 427         device_unregister(dev);
 428         return 0;
 429 }
 430
 431 static void impd1_remove(struct lm_device *dev)
 432 {
 433         struct impd1_module *impd1 = lm_get_drvdata(dev);
 434         int i;
 435
 436         device_for_each_child(&dev->dev, NULL, impd1_remove_one);
 437
 438         for (i = 0; i < ARRAY_SIZE(impd1->clks); i++)
 439                 clkdev_drop(impd1->clks[i]);
 440
 441         lm_set_drvdata(dev, NULL);
 442
 443         iounmap(impd1->base);
 444         kfree(impd1);
 445         release_mem_region(dev->resource.start, SZ_4K);
 446 }
 447
 448 static struct lm_driver impd1_driver = {
 449         .drv = {
 450                 .name   = "impd1",
 451         },
 452         .probe          = impd1_probe,
 453         .remove         = impd1_remove,
 454 };
 455
 456 static int __init impd1_init(void)
 457 {
 458         return lm_driver_register(&impd1_driver);
 459 }
 460
 461 static void __exit impd1_exit(void)
 462 {
 463         lm_driver_unregister(&impd1_driver);
 464 }
 465
 466 module_init(impd1_init);
 467 module_exit(impd1_exit);
 468
 469 MODULE_LICENSE("GPL");
 470 MODULE_DESCRIPTION("Integrator/IM-PD1 logic module core driver");
 471 MODULE_AUTHOR("Deep Blue Solutions Ltd");