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
  24 #include <asm/io.h>
  25 #include <asm/hardware/icst525.h>
  26 #include <asm/arch/lm.h>
  27 #include <asm/arch/impd1.h>
  28 #include <asm/sizes.h>
  29
  30 #include "clock.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 };
  41
  42 static const struct icst525_params impd1_vco_params = {
  43         .ref            = 24000,        /* 24 MHz */
  44         .vco_max        = 200000,       /* 200 MHz */
  45         .vd_min         = 12,
  46         .vd_max         = 519,
  47         .rd_min         = 3,
  48         .rd_max         = 120,
  49 };
  50
  51 static void impd1_setvco(struct clk *clk, struct icst525_vco vco)
  52 {
  53         struct impd1_module *impd1 = clk->data;
  54         int vconr = clk - impd1->vcos;
  55         u32 val;
  56
  57         val = vco.v | (vco.r << 9) | (vco.s << 16);
  58
  59         writel(0xa05f, impd1->base + IMPD1_LOCK);
  60         switch (vconr) {
  61         case 0:
  62                 writel(val, impd1->base + IMPD1_OSC1);
  63                 break;
  64         case 1:
  65                 writel(val, impd1->base + IMPD1_OSC2);
  66                 break;
  67         }
  68         writel(0, impd1->base + IMPD1_LOCK);
  69
  70 #ifdef DEBUG
  71         vco.v = val & 0x1ff;
  72         vco.r = (val >> 9) & 0x7f;
  73         vco.s = (val >> 16) & 7;
  74
  75         pr_debug("IM-PD1: VCO%d clock is %ld kHz\n",
  76                  vconr, icst525_khz(&impd1_vco_params, vco));
  77 #endif
  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         .connector      = IMPD1_CTRL_DISP_VGA,
 125         .bpp            = 16,
 126         .grayscale      = 0,
 127 };
 128
 129 #elif PANEL == SVGA
 130 #define PANELTYPE       svga
 131 static struct clcd_panel svga = {
 132         .mode           = {
 133                 .name           = "SVGA",
 134                 .refresh        = 0,
 135                 .xres           = 800,
 136                 .yres           = 600,
 137                 .pixclock       = 27778,
 138                 .left_margin    = 20,
 139                 .right_margin   = 20,
 140                 .upper_margin   = 5,
 141                 .lower_margin   = 5,
 142                 .hsync_len      = 164,
 143                 .vsync_len      = 62,
 144                 .sync           = 0,
 145                 .vmode          = FB_VMODE_NONINTERLACED,
 146         },
 147         .width          = -1,
 148         .height         = -1,
 149         .tim2           = TIM2_BCD,
 150         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 151         .connector      = IMPD1_CTRL_DISP_VGA,
 152         .bpp            = 16,
 153         .grayscale      = 0,
 154 };
 155
 156 #elif PANEL == PROSPECTOR
 157 #define PANELTYPE       prospector
 158 static struct clcd_panel prospector = {
 159         .mode           = {
 160                 .name           = "PROSPECTOR",
 161                 .refresh        = 0,
 162                 .xres           = 640,
 163                 .yres           = 480,
 164                 .pixclock       = 40000,
 165                 .left_margin    = 33,
 166                 .right_margin   = 64,
 167                 .upper_margin   = 36,
 168                 .lower_margin   = 7,
 169                 .hsync_len      = 64,
 170                 .vsync_len      = 25,
 171                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 172                 .vmode          = FB_VMODE_NONINTERLACED,
 173         },
 174         .width          = -1,
 175         .height         = -1,
 176         .tim2           = TIM2_BCD,
 177         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 178         .fixedtimings   = 1,
 179         .connector      = IMPD1_CTRL_DISP_LCD,
 180         .bpp            = 16,
 181         .grayscale      = 0,
 182 };
 183
 184 #elif PANEL == LTM10C209
 185 #define PANELTYPE       ltm10c209
 186 /*
 187  * Untested.
 188  */
 189 static struct clcd_panel ltm10c209 = {
 190         .mode           = {
 191                 .name           = "LTM10C209",
 192                 .refresh        = 0,
 193                 .xres           = 640,
 194                 .yres           = 480,
 195                 .pixclock       = 40000,
 196                 .left_margin    = 20,
 197                 .right_margin   = 20,
 198                 .upper_margin   = 19,
 199                 .lower_margin   = 19,
 200                 .hsync_len      = 20,
 201                 .vsync_len      = 10,
 202                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 203                 .vmode          = FB_VMODE_NONINTERLACED,
 204         },
 205         .width          = -1,
 206         .height         = -1,
 207         .tim2           = TIM2_BCD,
 208         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 209         .fixedtimings   = 1,
 210         .connector      = IMPD1_CTRL_DISP_LCD,
 211         .bpp            = 16,
 212         .grayscale      = 0,
 213 };
 214 #endif
 215
 216 /*
 217  * Disable all display connectors on the interface module.
 218  */
 219 static void impd1fb_clcd_disable(struct clcd_fb *fb)
 220 {
 221         impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK, 0);
 222 }
 223
 224 /*
 225  * Enable the relevant connector on the interface module.
 226  */
 227 static void impd1fb_clcd_enable(struct clcd_fb *fb)
 228 {
 229         impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK,
 230                         fb->panel->connector | IMPD1_CTRL_DISP_ENABLE);
 231 }
 232
 233 static int impd1fb_clcd_setup(struct clcd_fb *fb)
 234 {
 235         unsigned long framebase = fb->dev->res.start + 0x01000000;
 236         unsigned long framesize = SZ_1M;
 237         int ret = 0;
 238
 239         fb->panel = &PANELTYPE;
 240
 241         if (!request_mem_region(framebase, framesize, "clcd framebuffer")) {
 242                 printk(KERN_ERR "IM-PD1: unable to reserve framebuffer\n");
 243                 return -EBUSY;
 244         }
 245
 246         fb->fb.screen_base = ioremap(framebase, framesize);
 247         if (!fb->fb.screen_base) {
 248                 printk(KERN_ERR "IM-PD1: unable to map framebuffer\n");
 249                 ret = -ENOMEM;
 250                 goto free_buffer;
 251         }
 252
 253         fb->fb.fix.smem_start   = framebase;
 254         fb->fb.fix.smem_len     = framesize;
 255
 256         return 0;
 257
 258  free_buffer:
 259         release_mem_region(framebase, framesize);
 260         return ret;
 261 }
 262
 263 static int impd1fb_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
 264 {
 265         unsigned long start, size;
 266
 267         start = vma->vm_pgoff + (fb->fb.fix.smem_start >> PAGE_SHIFT);
 268         size = vma->vm_end - vma->vm_start;
 269
 270         return remap_pfn_range(vma, vma->vm_start, start, size,
 271                                vma->vm_page_prot);
 272 }
 273
 274 static void impd1fb_clcd_remove(struct clcd_fb *fb)
 275 {
 276         iounmap(fb->fb.screen_base);
 277         release_mem_region(fb->fb.fix.smem_start, fb->fb.fix.smem_len);
 278 }
 279
 280 static struct clcd_board impd1_clcd_data = {
 281         .name           = "IM-PD/1",
 282         .check          = clcdfb_check,
 283         .decode         = clcdfb_decode,
 284         .disable        = impd1fb_clcd_disable,
 285         .enable         = impd1fb_clcd_enable,
 286         .setup          = impd1fb_clcd_setup,
 287         .mmap           = impd1fb_clcd_mmap,
 288         .remove         = impd1fb_clcd_remove,
 289 };
 290
 291 struct impd1_device {
 292         unsigned long   offset;
 293         unsigned int    irq[2];
 294         unsigned int    id;
 295         void            *platform_data;
 296 };
 297
 298 static struct impd1_device impd1_devs[] = {
 299         {
 300                 .offset = 0x03000000,
 301                 .id     = 0x00041190,
 302         }, {
 303                 .offset = 0x00100000,
 304                 .irq    = { 1 },
 305                 .id     = 0x00141011,
 306         }, {
 307                 .offset = 0x00200000,
 308                 .irq    = { 2 },
 309                 .id     = 0x00141011,
 310         }, {
 311                 .offset = 0x00300000,
 312                 .irq    = { 3 },
 313                 .id     = 0x00041022,
 314         }, {
 315                 .offset = 0x00400000,
 316                 .irq    = { 4 },
 317                 .id     = 0x00041061,
 318         }, {
 319                 .offset = 0x00500000,
 320                 .irq    = { 5 },
 321                 .id     = 0x00041061,
 322         }, {
 323                 .offset = 0x00600000,
 324                 .irq    = { 6 },
 325                 .id     = 0x00041130,
 326         }, {
 327                 .offset = 0x00700000,
 328                 .irq    = { 7, 8 },
 329                 .id     = 0x00041181,
 330         }, {
 331                 .offset = 0x00800000,
 332                 .irq    = { 9 },
 333                 .id     = 0x00041041,
 334         }, {
 335                 .offset = 0x01000000,
 336                 .irq    = { 11 },
 337                 .id     = 0x00041110,
 338                 .platform_data = &impd1_clcd_data,
 339         }
 340 };
 341
 342 static const char *impd1_vconames[2] = {
 343         "CLCDCLK",
 344         "AUXVCO2",
 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", dev->resource.start);
 373
 374         for (i = 0; i < ARRAY_SIZE(impd1->vcos); i++) {
 375                 impd1->vcos[i].owner = THIS_MODULE,
 376                 impd1->vcos[i].name = impd1_vconames[i],
 377                 impd1->vcos[i].params = &impd1_vco_params,
 378                 impd1->vcos[i].data = impd1,
 379                 impd1->vcos[i].setvco = impd1_setvco;
 380
 381                 clk_register(&impd1->vcos[i]);
 382         }
 383
 384         for (i = 0; i < ARRAY_SIZE(impd1_devs); i++) {
 385                 struct impd1_device *idev = impd1_devs + i;
 386                 struct amba_device *d;
 387                 unsigned long pc_base;
 388
 389                 pc_base = dev->resource.start + idev->offset;
 390
 391                 d = kzalloc(sizeof(struct amba_device), GFP_KERNEL);
 392                 if (!d)
 393                         continue;
 394
 395                 snprintf(d->dev.bus_id, sizeof(d->dev.bus_id),
 396                          "lm%x:%5.5lx", dev->id, idev->offset >> 12);
 397
 398                 d->dev.parent   = &dev->dev;
 399                 d->res.start    = dev->resource.start + idev->offset;
 400                 d->res.end      = d->res.start + SZ_4K - 1;
 401                 d->res.flags    = IORESOURCE_MEM;
 402                 d->irq[0]       = dev->irq;
 403                 d->irq[1]       = dev->irq;
 404                 d->periphid     = idev->id;
 405                 d->dev.platform_data = idev->platform_data;
 406
 407                 ret = amba_device_register(d, &dev->resource);
 408                 if (ret) {
 409                         printk("unable to register device %s: %d\n",
 410                                 d->dev.bus_id, ret);
 411                         kfree(d);
 412                 }
 413         }
 414
 415         return 0;
 416
 417  free_impd1:
 418         if (impd1 && impd1->base)
 419                 iounmap(impd1->base);
 420         kfree(impd1);
 421  release_lm:
 422         release_mem_region(dev->resource.start, SZ_4K);
 423         return ret;
 424 }
 425
 426 static int impd1_remove_one(struct device *dev, void *data)
 427 {
 428         device_unregister(dev);
 429         return 0;
 430 }
 431
 432 static void impd1_remove(struct lm_device *dev)
 433 {
 434         struct impd1_module *impd1 = lm_get_drvdata(dev);
 435         int i;
 436
 437         device_for_each_child(&dev->dev, NULL, impd1_remove_one);
 438
 439         for (i = 0; i < ARRAY_SIZE(impd1->vcos); i++)
 440                 clk_unregister(&impd1->vcos[i]);
 441
 442         lm_set_drvdata(dev, NULL);
 443
 444         iounmap(impd1->base);
 445         kfree(impd1);
 446         release_mem_region(dev->resource.start, SZ_4K);
 447 }
 448
 449 static struct lm_driver impd1_driver = {
 450         .drv = {
 451                 .name   = "impd1",
 452         },
 453         .probe          = impd1_probe,
 454         .remove         = impd1_remove,
 455 };
 456
 457 static int __init impd1_init(void)
 458 {
 459         return lm_driver_register(&impd1_driver);
 460 }
 461
 462 static void __exit impd1_exit(void)
 463 {
 464         lm_driver_unregister(&impd1_driver);
 465 }
 466
 467 module_init(impd1_init);
 468 module_exit(impd1_exit);
 469
 470 MODULE_LICENSE("GPL");
 471 MODULE_DESCRIPTION("Integrator/IM-PD1 logic module core driver");
 472 MODULE_AUTHOR("Deep Blue Solutions Ltd");