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/icst525.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 icst525_params impd1_vco_params = {
  45         .ref            = 24000,        /* 24 MHz */
  46         .vco_max        = 200000,       /* 200 MHz */
  47         .vd_min         = 12,
  48         .vd_max         = 519,
  49         .rd_min         = 3,
  50         .rd_max         = 120,
  51 };
  52
  53 static void impd1_setvco(struct clk *clk, struct icst525_vco vco)
  54 {
  55         struct impd1_module *impd1 = clk->data;
  56         int vconr = clk - impd1->vcos;
  57         u32 val;
  58
  59         val = vco.v | (vco.r << 9) | (vco.s << 16);
  60
  61         writel(0xa05f, impd1->base + IMPD1_LOCK);
  62         switch (vconr) {
  63         case 0:
  64                 writel(val, impd1->base + IMPD1_OSC1);
  65                 break;
  66         case 1:
  67                 writel(val, impd1->base + IMPD1_OSC2);
  68                 break;
  69         }
  70         writel(0, impd1->base + IMPD1_LOCK);
  71
  72 #ifdef DEBUG
  73         vco.v = val & 0x1ff;
  74         vco.r = (val >> 9) & 0x7f;
  75         vco.s = (val >> 16) & 7;
  76
  77         pr_debug("IM-PD1: VCO%d clock is %ld kHz\n",
  78                  vconr, icst525_khz(&impd1_vco_params, vco));
  79 #endif
  80 }
  81
  82 void impd1_tweak_control(struct device *dev, u32 mask, u32 val)
  83 {
  84         struct impd1_module *impd1 = dev_get_drvdata(dev);
  85         u32 cur;
  86
  87         val &= mask;
  88         cur = readl(impd1->base + IMPD1_CTRL) & ~mask;
  89         writel(cur | val, impd1->base + IMPD1_CTRL);
  90 }
  91
  92 EXPORT_SYMBOL(impd1_tweak_control);
  93
  94 /*
  95  * CLCD support
  96  */
  97 #define PANEL           PROSPECTOR
  98
  99 #define LTM10C209               1
 100 #define PROSPECTOR              2
 101 #define SVGA                    3
 102 #define VGA                     4
 103
 104 #if PANEL == VGA
 105 #define PANELTYPE       vga
 106 static struct clcd_panel vga = {
 107         .mode           = {
 108                 .name           = "VGA",
 109                 .refresh        = 60,
 110                 .xres           = 640,
 111                 .yres           = 480,
 112                 .pixclock       = 39721,
 113                 .left_margin    = 40,
 114                 .right_margin   = 24,
 115                 .upper_margin   = 32,
 116                 .lower_margin   = 11,
 117                 .hsync_len      = 96,
 118                 .vsync_len      = 2,
 119                 .sync           = 0,
 120                 .vmode          = FB_VMODE_NONINTERLACED,
 121         },
 122         .width          = -1,
 123         .height         = -1,
 124         .tim2           = TIM2_BCD | TIM2_IPC,
 125         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 126         .connector      = IMPD1_CTRL_DISP_VGA,
 127         .bpp            = 16,
 128         .grayscale      = 0,
 129 };
 130
 131 #elif PANEL == SVGA
 132 #define PANELTYPE       svga
 133 static struct clcd_panel svga = {
 134         .mode           = {
 135                 .name           = "SVGA",
 136                 .refresh        = 0,
 137                 .xres           = 800,
 138                 .yres           = 600,
 139                 .pixclock       = 27778,
 140                 .left_margin    = 20,
 141                 .right_margin   = 20,
 142                 .upper_margin   = 5,
 143                 .lower_margin   = 5,
 144                 .hsync_len      = 164,
 145                 .vsync_len      = 62,
 146                 .sync           = 0,
 147                 .vmode          = FB_VMODE_NONINTERLACED,
 148         },
 149         .width          = -1,
 150         .height         = -1,
 151         .tim2           = TIM2_BCD,
 152         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 153         .connector      = IMPD1_CTRL_DISP_VGA,
 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         .fixedtimings   = 1,
 181         .connector      = IMPD1_CTRL_DISP_LCD,
 182         .bpp            = 16,
 183         .grayscale      = 0,
 184 };
 185
 186 #elif PANEL == LTM10C209
 187 #define PANELTYPE       ltm10c209
 188 /*
 189  * Untested.
 190  */
 191 static struct clcd_panel ltm10c209 = {
 192         .mode           = {
 193                 .name           = "LTM10C209",
 194                 .refresh        = 0,
 195                 .xres           = 640,
 196                 .yres           = 480,
 197                 .pixclock       = 40000,
 198                 .left_margin    = 20,
 199                 .right_margin   = 20,
 200                 .upper_margin   = 19,
 201                 .lower_margin   = 19,
 202                 .hsync_len      = 20,
 203                 .vsync_len      = 10,
 204                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 205                 .vmode          = FB_VMODE_NONINTERLACED,
 206         },
 207         .width          = -1,
 208         .height         = -1,
 209         .tim2           = TIM2_BCD,
 210         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 211         .fixedtimings   = 1,
 212         .connector      = IMPD1_CTRL_DISP_LCD,
 213         .bpp            = 16,
 214         .grayscale      = 0,
 215 };
 216 #endif
 217
 218 /*
 219  * Disable all display connectors on the interface module.
 220  */
 221 static void impd1fb_clcd_disable(struct clcd_fb *fb)
 222 {
 223         impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK, 0);
 224 }
 225
 226 /*
 227  * Enable the relevant connector on the interface module.
 228  */
 229 static void impd1fb_clcd_enable(struct clcd_fb *fb)
 230 {
 231         impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK,
 232                         fb->panel->connector | IMPD1_CTRL_DISP_ENABLE);
 233 }
 234
 235 static int impd1fb_clcd_setup(struct clcd_fb *fb)
 236 {
 237         unsigned long framebase = fb->dev->res.start + 0x01000000;
 238         unsigned long framesize = SZ_1M;
 239         int ret = 0;
 240
 241         fb->panel = &PANELTYPE;
 242
 243         if (!request_mem_region(framebase, framesize, "clcd framebuffer")) {
 244                 printk(KERN_ERR "IM-PD1: unable to reserve framebuffer\n");
 245                 return -EBUSY;
 246         }
 247
 248         fb->fb.screen_base = ioremap(framebase, framesize);
 249         if (!fb->fb.screen_base) {
 250                 printk(KERN_ERR "IM-PD1: unable to map framebuffer\n");
 251                 ret = -ENOMEM;
 252                 goto free_buffer;
 253         }
 254
 255         fb->fb.fix.smem_start   = framebase;
 256         fb->fb.fix.smem_len     = framesize;
 257
 258         return 0;
 259
 260  free_buffer:
 261         release_mem_region(framebase, framesize);
 262         return ret;
 263 }
 264
 265 static int impd1fb_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
 266 {
 267         unsigned long start, size;
 268
 269         start = vma->vm_pgoff + (fb->fb.fix.smem_start >> PAGE_SHIFT);
 270         size = vma->vm_end - vma->vm_start;
 271
 272         return remap_pfn_range(vma, vma->vm_start, start, size,
 273                                vma->vm_page_prot);
 274 }
 275
 276 static void impd1fb_clcd_remove(struct clcd_fb *fb)
 277 {
 278         iounmap(fb->fb.screen_base);
 279         release_mem_region(fb->fb.fix.smem_start, fb->fb.fix.smem_len);
 280 }
 281
 282 static struct clcd_board impd1_clcd_data = {
 283         .name           = "IM-PD/1",
 284         .check          = clcdfb_check,
 285         .decode         = clcdfb_decode,
 286         .disable        = impd1fb_clcd_disable,
 287         .enable         = impd1fb_clcd_enable,
 288         .setup          = impd1fb_clcd_setup,
 289         .mmap           = impd1fb_clcd_mmap,
 290         .remove         = impd1fb_clcd_remove,
 291 };
 292
 293 struct impd1_device {
 294         unsigned long   offset;
 295         unsigned int    irq[2];
 296         unsigned int    id;
 297         void            *platform_data;
 298 };
 299
 300 static struct impd1_device impd1_devs[] = {
 301         {
 302                 .offset = 0x03000000,
 303                 .id     = 0x00041190,
 304         }, {
 305                 .offset = 0x00100000,
 306                 .irq    = { 1 },
 307                 .id     = 0x00141011,
 308         }, {
 309                 .offset = 0x00200000,
 310                 .irq    = { 2 },
 311                 .id     = 0x00141011,
 312         }, {
 313                 .offset = 0x00300000,
 314                 .irq    = { 3 },
 315                 .id     = 0x00041022,
 316         }, {
 317                 .offset = 0x00400000,
 318                 .irq    = { 4 },
 319                 .id     = 0x00041061,
 320         }, {
 321                 .offset = 0x00500000,
 322                 .irq    = { 5 },
 323                 .id     = 0x00041061,
 324         }, {
 325                 .offset = 0x00600000,
 326                 .irq    = { 6 },
 327                 .id     = 0x00041130,
 328         }, {
 329                 .offset = 0x00700000,
 330                 .irq    = { 7, 8 },
 331                 .id     = 0x00041181,
 332         }, {
 333                 .offset = 0x00800000,
 334                 .irq    = { 9 },
 335                 .id     = 0x00041041,
 336         }, {
 337                 .offset = 0x01000000,
 338                 .irq    = { 11 },
 339                 .id     = 0x00041110,
 340                 .platform_data = &impd1_clcd_data,
 341         }
 342 };
 343
 344 static struct clk fixed_14745600 = {
 345         .rate = 14745600,
 346 };
 347
 348 static int impd1_probe(struct lm_device *dev)
 349 {
 350         struct impd1_module *impd1;
 351         int i, ret;
 352
 353         if (dev->id != module_id)
 354                 return -EINVAL;
 355
 356         if (!request_mem_region(dev->resource.start, SZ_4K, "LM registers"))
 357                 return -EBUSY;
 358
 359         impd1 = kzalloc(sizeof(struct impd1_module), GFP_KERNEL);
 360         if (!impd1) {
 361                 ret = -ENOMEM;
 362                 goto release_lm;
 363         }
 364
 365         impd1->base = ioremap(dev->resource.start, SZ_4K);
 366         if (!impd1->base) {
 367                 ret = -ENOMEM;
 368                 goto free_impd1;
 369         }
 370
 371         lm_set_drvdata(dev, impd1);
 372
 373         printk("IM-PD1 found at 0x%08lx\n",
 374                 (unsigned long)dev->resource.start);
 375
 376         for (i = 0; i < ARRAY_SIZE(impd1->vcos); i++) {
 377                 impd1->vcos[i].owner = THIS_MODULE,
 378                 impd1->vcos[i].params = &impd1_vco_params,
 379                 impd1->vcos[i].data = impd1,
 380                 impd1->vcos[i].setvco = impd1_setvco;
 381         }
 382
 383         impd1->clks[0] = clkdev_alloc(&impd1->vcos[0], NULL, "lm%x:01000",
 384                                         dev->id);
 385         impd1->clks[1] = clkdev_alloc(&fixed_14745600, NULL, "lm%x:00100",
 386                                         dev->id);
 387         impd1->clks[2] = clkdev_alloc(&fixed_14745600, NULL, "lm%x:00200",
 388                                         dev->id);
 389         for (i = 0; i < ARRAY_SIZE(impd1->clks); i++)
 390                 clkdev_add(impd1->clks[i]);
 391
 392         for (i = 0; i < ARRAY_SIZE(impd1_devs); i++) {
 393                 struct impd1_device *idev = impd1_devs + i;
 394                 struct amba_device *d;
 395                 unsigned long pc_base;
 396
 397                 pc_base = dev->resource.start + idev->offset;
 398
 399                 d = kzalloc(sizeof(struct amba_device), GFP_KERNEL);
 400                 if (!d)
 401                         continue;
 402
 403                 dev_set_name(&d->dev, "lm%x:%5.5lx", dev->id, idev->offset >> 12);
 404                 d->dev.parent   = &dev->dev;
 405                 d->res.start    = dev->resource.start + idev->offset;
 406                 d->res.end      = d->res.start + SZ_4K - 1;
 407                 d->res.flags    = IORESOURCE_MEM;
 408                 d->irq[0]       = dev->irq;
 409                 d->irq[1]       = dev->irq;
 410                 d->periphid     = idev->id;
 411                 d->dev.platform_data = idev->platform_data;
 412
 413                 ret = amba_device_register(d, &dev->resource);
 414                 if (ret) {
 415                         dev_err(&d->dev, "unable to register device: %d\n", ret);
 416                         kfree(d);
 417                 }
 418         }
 419
 420         return 0;
 421
 422  free_impd1:
 423         if (impd1 && impd1->base)
 424                 iounmap(impd1->base);
 425         kfree(impd1);
 426  release_lm:
 427         release_mem_region(dev->resource.start, SZ_4K);
 428         return ret;
 429 }
 430
 431 static int impd1_remove_one(struct device *dev, void *data)
 432 {
 433         device_unregister(dev);
 434         return 0;
 435 }
 436
 437 static void impd1_remove(struct lm_device *dev)
 438 {
 439         struct impd1_module *impd1 = lm_get_drvdata(dev);
 440         int i;
 441
 442         device_for_each_child(&dev->dev, NULL, impd1_remove_one);
 443
 444         for (i = 0; i < ARRAY_SIZE(impd1->clks); i++)
 445                 clkdev_drop(impd1->clks[i]);
 446
 447         lm_set_drvdata(dev, NULL);
 448
 449         iounmap(impd1->base);
 450         kfree(impd1);
 451         release_mem_region(dev->resource.start, SZ_4K);
 452 }
 453
 454 static struct lm_driver impd1_driver = {
 455         .drv = {
 456                 .name   = "impd1",
 457         },
 458         .probe          = impd1_probe,
 459         .remove         = impd1_remove,
 460 };
 461
 462 static int __init impd1_init(void)
 463 {
 464         return lm_driver_register(&impd1_driver);
 465 }
 466
 467 static void __exit impd1_exit(void)
 468 {
 469         lm_driver_unregister(&impd1_driver);
 470 }
 471
 472 module_init(impd1_init);
 473 module_exit(impd1_exit);
 474
 475 MODULE_LICENSE("GPL");
 476 MODULE_DESCRIPTION("Integrator/IM-PD1 logic module core driver");
 477 MODULE_AUTHOR("Deep Blue Solutions Ltd");