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
  26 #include <asm/clkdev.h>
  27 #include <mach/clkdev.h>
  28 #include <asm/hardware/icst.h>
  29 #include <mach/lm.h>
  30 #include <mach/impd1.h>
  31 #include <asm/sizes.h>
  32
  33 static int module_id;
  34
  35 module_param_named(lmid, module_id, int, 0444);
  36 MODULE_PARM_DESC(lmid, "logic module stack position");
  37
  38 struct impd1_module {
  39         void __iomem    *base;
  40         struct clk      vcos[2];
  41         struct clk_lookup *clks[3];
  42 };
  43
  44 static const struct icst_params impd1_vco_params = {
  45         .ref            = 24000000,     /* 24 MHz */
  46         .vco_max        = ICST525_VCO_MAX_3V,
  47         .vco_min        = ICST525_VCO_MIN,
  48         .vd_min         = 12,
  49         .vd_max         = 519,
  50         .rd_min         = 3,
  51         .rd_max         = 120,
  52         .s2div          = icst525_s2div,
  53         .idx2s          = icst525_idx2s,
  54 };
  55
  56 static void impd1_setvco(struct clk *clk, struct icst_vco vco)
  57 {
  58         struct impd1_module *impd1 = clk->data;
  59         u32 val = vco.v | (vco.r << 9) | (vco.s << 16);
  60
  61         writel(0xa05f, impd1->base + IMPD1_LOCK);
  62         writel(val, clk->vcoreg);
  63         writel(0, impd1->base + IMPD1_LOCK);
  64
  65 #ifdef DEBUG
  66         vco.v = val & 0x1ff;
  67         vco.r = (val >> 9) & 0x7f;
  68         vco.s = (val >> 16) & 7;
  69
  70         pr_debug("IM-PD1: VCO%d clock is %ld Hz\n",
  71                  vconr, icst525_hz(&impd1_vco_params, vco));
  72 #endif
  73 }
  74
  75 static const struct clk_ops impd1_clk_ops = {
  76         .round  = icst_clk_round,
  77         .set    = icst_clk_set,
  78         .setvco = impd1_setvco,
  79 };
  80
  81 void impd1_tweak_control(struct device *dev, u32 mask, u32 val)
  82 {
  83         struct impd1_module *impd1 = dev_get_drvdata(dev);
  84         u32 cur;
  85
  86         val &= mask;
  87         cur = readl(impd1->base + IMPD1_CTRL) & ~mask;
  88         writel(cur | val, impd1->base + IMPD1_CTRL);
  89 }
  90
  91 EXPORT_SYMBOL(impd1_tweak_control);
  92
  93 /*
  94  * CLCD support
  95  */
  96 #define PANEL           PROSPECTOR
  97
  98 #define LTM10C209               1
  99 #define PROSPECTOR              2
 100 #define SVGA                    3
 101 #define VGA                     4
 102
 103 #if PANEL == VGA
 104 #define PANELTYPE       vga
 105 static struct clcd_panel vga = {
 106         .mode           = {
 107                 .name           = "VGA",
 108                 .refresh        = 60,
 109                 .xres           = 640,
 110                 .yres           = 480,
 111                 .pixclock       = 39721,
 112                 .left_margin    = 40,
 113                 .right_margin   = 24,
 114                 .upper_margin   = 32,
 115                 .lower_margin   = 11,
 116                 .hsync_len      = 96,
 117                 .vsync_len      = 2,
 118                 .sync           = 0,
 119                 .vmode          = FB_VMODE_NONINTERLACED,
 120         },
 121         .width          = -1,
 122         .height         = -1,
 123         .tim2           = TIM2_BCD | TIM2_IPC,
 124         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 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         .bpp            = 16,
 154         .grayscale      = 0,
 155 };
 156
 157 #elif PANEL == PROSPECTOR
 158 #define PANELTYPE       prospector
 159 static struct clcd_panel prospector = {
 160         .mode           = {
 161                 .name           = "PROSPECTOR",
 162                 .refresh        = 0,
 163                 .xres           = 640,
 164                 .yres           = 480,
 165                 .pixclock       = 40000,
 166                 .left_margin    = 33,
 167                 .right_margin   = 64,
 168                 .upper_margin   = 36,
 169                 .lower_margin   = 7,
 170                 .hsync_len      = 64,
 171                 .vsync_len      = 25,
 172                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 173                 .vmode          = FB_VMODE_NONINTERLACED,
 174         },
 175         .width          = -1,
 176         .height         = -1,
 177         .tim2           = TIM2_BCD,
 178         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 179         .fixedtimings   = 1,
 180         .connector      = IMPD1_CTRL_DISP_LCD,
 181         .bpp            = 16,
 182         .grayscale      = 0,
 183 };
 184
 185 #elif PANEL == LTM10C209
 186 #define PANELTYPE       ltm10c209
 187 /*
 188  * Untested.
 189  */
 190 static struct clcd_panel ltm10c209 = {
 191         .mode           = {
 192                 .name           = "LTM10C209",
 193                 .refresh        = 0,
 194                 .xres           = 640,
 195                 .yres           = 480,
 196                 .pixclock       = 40000,
 197                 .left_margin    = 20,
 198                 .right_margin   = 20,
 199                 .upper_margin   = 19,
 200                 .lower_margin   = 19,
 201                 .hsync_len      = 20,
 202                 .vsync_len      = 10,
 203                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 204                 .vmode          = FB_VMODE_NONINTERLACED,
 205         },
 206         .width          = -1,
 207         .height         = -1,
 208         .tim2           = TIM2_BCD,
 209         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 210         .fixedtimings   = 1,
 211         .connector      = IMPD1_CTRL_DISP_LCD,
 212         .bpp            = 16,
 213         .grayscale      = 0,
 214 };
 215 #endif
 216
 217 /*
 218  * Disable all display connectors on the interface module.
 219  */
 220 static void impd1fb_clcd_disable(struct clcd_fb *fb)
 221 {
 222         impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK, 0);
 223 }
 224
 225 /*
 226  * Enable the relevant connector on the interface module.
 227  */
 228 static void impd1fb_clcd_enable(struct clcd_fb *fb)
 229 {
 230         impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK,
 231                         fb->panel->connector | IMPD1_CTRL_DISP_ENABLE);
 232 }
 233
 234 static int impd1fb_clcd_setup(struct clcd_fb *fb)
 235 {
 236         unsigned long framebase = fb->dev->res.start + 0x01000000;
 237         unsigned long framesize = SZ_1M;
 238         int ret = 0;
 239
 240         fb->panel = &PANELTYPE;
 241
 242         if (!request_mem_region(framebase, framesize, "clcd framebuffer")) {
 243                 printk(KERN_ERR "IM-PD1: unable to reserve framebuffer\n");
 244                 return -EBUSY;
 245         }
 246
 247         fb->fb.screen_base = ioremap(framebase, framesize);
 248         if (!fb->fb.screen_base) {
 249                 printk(KERN_ERR "IM-PD1: unable to map framebuffer\n");
 250                 ret = -ENOMEM;
 251                 goto free_buffer;
 252         }
 253
 254         fb->fb.fix.smem_start   = framebase;
 255         fb->fb.fix.smem_len     = framesize;
 256
 257         return 0;
 258
 259  free_buffer:
 260         release_mem_region(framebase, framesize);
 261         return ret;
 262 }
 263
 264 static int impd1fb_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
 265 {
 266         unsigned long start, size;
 267
 268         start = vma->vm_pgoff + (fb->fb.fix.smem_start >> PAGE_SHIFT);
 269         size = vma->vm_end - vma->vm_start;
 270
 271         return remap_pfn_range(vma, vma->vm_start, start, size,
 272                                vma->vm_page_prot);
 273 }
 274
 275 static void impd1fb_clcd_remove(struct clcd_fb *fb)
 276 {
 277         iounmap(fb->fb.screen_base);
 278         release_mem_region(fb->fb.fix.smem_start, fb->fb.fix.smem_len);
 279 }
 280
 281 static struct clcd_board impd1_clcd_data = {
 282         .name           = "IM-PD/1",
 283         .check          = clcdfb_check,
 284         .decode         = clcdfb_decode,
 285         .disable        = impd1fb_clcd_disable,
 286         .enable         = impd1fb_clcd_enable,
 287         .setup          = impd1fb_clcd_setup,
 288         .mmap           = impd1fb_clcd_mmap,
 289         .remove         = impd1fb_clcd_remove,
 290 };
 291
 292 struct impd1_device {
 293         unsigned long   offset;
 294         unsigned int    irq[2];
 295         unsigned int    id;
 296         void            *platform_data;
 297 };
 298
 299 static struct impd1_device impd1_devs[] = {
 300         {
 301                 .offset = 0x03000000,
 302                 .id     = 0x00041190,
 303         }, {
 304                 .offset = 0x00100000,
 305                 .irq    = { 1 },
 306                 .id     = 0x00141011,
 307         }, {
 308                 .offset = 0x00200000,
 309                 .irq    = { 2 },
 310                 .id     = 0x00141011,
 311         }, {
 312                 .offset = 0x00300000,
 313                 .irq    = { 3 },
 314                 .id     = 0x00041022,
 315         }, {
 316                 .offset = 0x00400000,
 317                 .irq    = { 4 },
 318                 .id     = 0x00041061,
 319         }, {
 320                 .offset = 0x00500000,
 321                 .irq    = { 5 },
 322                 .id     = 0x00041061,
 323         }, {
 324                 .offset = 0x00600000,
 325                 .irq    = { 6 },
 326                 .id     = 0x00041130,
 327         }, {
 328                 .offset = 0x00700000,
 329                 .irq    = { 7, 8 },
 330                 .id     = 0x00041181,
 331         }, {
 332                 .offset = 0x00800000,
 333                 .irq    = { 9 },
 334                 .id     = 0x00041041,
 335         }, {
 336                 .offset = 0x01000000,
 337                 .irq    = { 11 },
 338                 .id     = 0x00041110,
 339                 .platform_data = &impd1_clcd_data,
 340         }
 341 };
 342
 343 static struct clk fixed_14745600 = {
 344         .rate = 14745600,
 345 };
 346
 347 static int impd1_probe(struct lm_device *dev)
 348 {
 349         struct impd1_module *impd1;
 350         int i, ret;
 351
 352         if (dev->id != module_id)
 353                 return -EINVAL;
 354
 355         if (!request_mem_region(dev->resource.start, SZ_4K, "LM registers"))
 356                 return -EBUSY;
 357
 358         impd1 = kzalloc(sizeof(struct impd1_module), GFP_KERNEL);
 359         if (!impd1) {
 360                 ret = -ENOMEM;
 361                 goto release_lm;
 362         }
 363
 364         impd1->base = ioremap(dev->resource.start, SZ_4K);
 365         if (!impd1->base) {
 366                 ret = -ENOMEM;
 367                 goto free_impd1;
 368         }
 369
 370         lm_set_drvdata(dev, impd1);
 371
 372         printk("IM-PD1 found at 0x%08lx\n",
 373                 (unsigned long)dev->resource.start);
 374
 375         for (i = 0; i < ARRAY_SIZE(impd1->vcos); i++) {
 376                 impd1->vcos[i].ops = &impd1_clk_ops,
 377                 impd1->vcos[i].owner = THIS_MODULE,
 378                 impd1->vcos[i].params = &impd1_vco_params,
 379                 impd1->vcos[i].data = impd1;
 380         }
 381         impd1->vcos[0].vcoreg = impd1->base + IMPD1_OSC1;
 382         impd1->vcos[1].vcoreg = impd1->base + IMPD1_OSC2;
 383
 384         impd1->clks[0] = clkdev_alloc(&impd1->vcos[0], NULL, "lm%x:01000",
 385                                         dev->id);
 386         impd1->clks[1] = clkdev_alloc(&fixed_14745600, NULL, "lm%x:00100",
 387                                         dev->id);
 388         impd1->clks[2] = clkdev_alloc(&fixed_14745600, NULL, "lm%x:00200",
 389                                         dev->id);
 390         for (i = 0; i < ARRAY_SIZE(impd1->clks); i++)
 391                 clkdev_add(impd1->clks[i]);
 392
 393         for (i = 0; i < ARRAY_SIZE(impd1_devs); i++) {
 394                 struct impd1_device *idev = impd1_devs + i;
 395                 struct amba_device *d;
 396                 unsigned long pc_base;
 397
 398                 pc_base = dev->resource.start + idev->offset;
 399
 400                 d = kzalloc(sizeof(struct amba_device), GFP_KERNEL);
 401                 if (!d)
 402                         continue;
 403
 404                 dev_set_name(&d->dev, "lm%x:%5.5lx", dev->id, idev->offset >> 12);
 405                 d->dev.parent   = &dev->dev;
 406                 d->res.start    = dev->resource.start + idev->offset;
 407                 d->res.end      = d->res.start + SZ_4K - 1;
 408                 d->res.flags    = IORESOURCE_MEM;
 409                 d->irq[0]       = dev->irq;
 410                 d->irq[1]       = dev->irq;
 411                 d->periphid     = idev->id;
 412                 d->dev.platform_data = idev->platform_data;
 413
 414                 ret = amba_device_register(d, &dev->resource);
 415                 if (ret) {
 416                         dev_err(&d->dev, "unable to register device: %d\n", ret);
 417                         kfree(d);
 418                 }
 419         }
 420
 421         return 0;
 422
 423  free_impd1:
 424         if (impd1 && impd1->base)
 425                 iounmap(impd1->base);
 426         kfree(impd1);
 427  release_lm:
 428         release_mem_region(dev->resource.start, SZ_4K);
 429         return ret;
 430 }
 431
 432 static int impd1_remove_one(struct device *dev, void *data)
 433 {
 434         device_unregister(dev);
 435         return 0;
 436 }
 437
 438 static void impd1_remove(struct lm_device *dev)
 439 {
 440         struct impd1_module *impd1 = lm_get_drvdata(dev);
 441         int i;
 442
 443         device_for_each_child(&dev->dev, NULL, impd1_remove_one);
 444
 445         for (i = 0; i < ARRAY_SIZE(impd1->clks); i++)
 446                 clkdev_drop(impd1->clks[i]);
 447
 448         lm_set_drvdata(dev, NULL);
 449
 450         iounmap(impd1->base);
 451         kfree(impd1);
 452         release_mem_region(dev->resource.start, SZ_4K);
 453 }
 454
 455 static struct lm_driver impd1_driver = {
 456         .drv = {
 457                 .name   = "impd1",
 458         },
 459         .probe          = impd1_probe,
 460         .remove         = impd1_remove,
 461 };
 462
 463 static int __init impd1_init(void)
 464 {
 465         return lm_driver_register(&impd1_driver);
 466 }
 467
 468 static void __exit impd1_exit(void)
 469 {
 470         lm_driver_unregister(&impd1_driver);
 471 }
 472
 473 module_init(impd1_init);
 474 module_exit(impd1_exit);
 475
 476 MODULE_LICENSE("GPL");
 477 MODULE_DESCRIPTION("Integrator/IM-PD1 logic module core driver");
 478 MODULE_AUTHOR("Deep Blue Solutions Ltd");