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/amba/mmci.h>
  24 #include <linux/io.h>
  25 #include <linux/platform_data/clk-integrator.h>
  26 #include <linux/slab.h>
  27 #include <linux/irqchip/arm-vic.h>
  28 #include <linux/gpio/machine.h>
  29
  30 #include <asm/sizes.h>
  31 #include "lm.h"
  32 #include "impd1.h"
  33
  34 static int module_id;
  35
  36 module_param_named(lmid, module_id, int, 0444);
  37 MODULE_PARM_DESC(lmid, "logic module stack position");
  38
  39 struct impd1_module {
  40         void __iomem    *base;
  41         void __iomem    *vic_base;
  42 };
  43
  44 void impd1_tweak_control(struct device *dev, u32 mask, u32 val)
  45 {
  46         struct impd1_module *impd1 = dev_get_drvdata(dev);
  47         u32 cur;
  48
  49         val &= mask;
  50         cur = readl(impd1->base + IMPD1_CTRL) & ~mask;
  51         writel(cur | val, impd1->base + IMPD1_CTRL);
  52 }
  53
  54 EXPORT_SYMBOL(impd1_tweak_control);
  55
  56 /*
  57  * MMC support
  58  */
  59 static struct mmci_platform_data mmc_data = {
  60         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
  61 };
  62
  63 /*
  64  * CLCD support
  65  */
  66 #define PANEL           PROSPECTOR
  67
  68 #define LTM10C209               1
  69 #define PROSPECTOR              2
  70 #define SVGA                    3
  71 #define VGA                     4
  72
  73 #if PANEL == VGA
  74 #define PANELTYPE       vga
  75 static struct clcd_panel vga = {
  76         .mode           = {
  77                 .name           = "VGA",
  78                 .refresh        = 60,
  79                 .xres           = 640,
  80                 .yres           = 480,
  81                 .pixclock       = 39721,
  82                 .left_margin    = 40,
  83                 .right_margin   = 24,
  84                 .upper_margin   = 32,
  85                 .lower_margin   = 11,
  86                 .hsync_len      = 96,
  87                 .vsync_len      = 2,
  88                 .sync           = 0,
  89                 .vmode          = FB_VMODE_NONINTERLACED,
  90         },
  91         .width          = -1,
  92         .height         = -1,
  93         .tim2           = TIM2_BCD | TIM2_IPC,
  94         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
  95         .caps           = CLCD_CAP_5551,
  96         .connector      = IMPD1_CTRL_DISP_VGA,
  97         .bpp            = 16,
  98         .grayscale      = 0,
  99 };
 100
 101 #elif PANEL == SVGA
 102 #define PANELTYPE       svga
 103 static struct clcd_panel svga = {
 104         .mode           = {
 105                 .name           = "SVGA",
 106                 .refresh        = 0,
 107                 .xres           = 800,
 108                 .yres           = 600,
 109                 .pixclock       = 27778,
 110                 .left_margin    = 20,
 111                 .right_margin   = 20,
 112                 .upper_margin   = 5,
 113                 .lower_margin   = 5,
 114                 .hsync_len      = 164,
 115                 .vsync_len      = 62,
 116                 .sync           = 0,
 117                 .vmode          = FB_VMODE_NONINTERLACED,
 118         },
 119         .width          = -1,
 120         .height         = -1,
 121         .tim2           = TIM2_BCD,
 122         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 123         .connector      = IMPD1_CTRL_DISP_VGA,
 124         .caps           = CLCD_CAP_5551,
 125         .bpp            = 16,
 126         .grayscale      = 0,
 127 };
 128
 129 #elif PANEL == PROSPECTOR
 130 #define PANELTYPE       prospector
 131 static struct clcd_panel prospector = {
 132         .mode           = {
 133                 .name           = "PROSPECTOR",
 134                 .refresh        = 0,
 135                 .xres           = 640,
 136                 .yres           = 480,
 137                 .pixclock       = 40000,
 138                 .left_margin    = 33,
 139                 .right_margin   = 64,
 140                 .upper_margin   = 36,
 141                 .lower_margin   = 7,
 142                 .hsync_len      = 64,
 143                 .vsync_len      = 25,
 144                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 145                 .vmode          = FB_VMODE_NONINTERLACED,
 146         },
 147         .width          = -1,
 148         .height         = -1,
 149         .tim2           = TIM2_BCD,
 150         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 151         .caps           = CLCD_CAP_5551,
 152         .fixedtimings   = 1,
 153         .connector      = IMPD1_CTRL_DISP_LCD,
 154         .bpp            = 16,
 155         .grayscale      = 0,
 156 };
 157
 158 #elif PANEL == LTM10C209
 159 #define PANELTYPE       ltm10c209
 160 /*
 161  * Untested.
 162  */
 163 static struct clcd_panel ltm10c209 = {
 164         .mode           = {
 165                 .name           = "LTM10C209",
 166                 .refresh        = 0,
 167                 .xres           = 640,
 168                 .yres           = 480,
 169                 .pixclock       = 40000,
 170                 .left_margin    = 20,
 171                 .right_margin   = 20,
 172                 .upper_margin   = 19,
 173                 .lower_margin   = 19,
 174                 .hsync_len      = 20,
 175                 .vsync_len      = 10,
 176                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 177                 .vmode          = FB_VMODE_NONINTERLACED,
 178         },
 179         .width          = -1,
 180         .height         = -1,
 181         .tim2           = TIM2_BCD,
 182         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 183         .caps           = CLCD_CAP_5551,
 184         .fixedtimings   = 1,
 185         .connector      = IMPD1_CTRL_DISP_LCD,
 186         .bpp            = 16,
 187         .grayscale      = 0,
 188 };
 189 #endif
 190
 191 /*
 192  * Disable all display connectors on the interface module.
 193  */
 194 static void impd1fb_clcd_disable(struct clcd_fb *fb)
 195 {
 196         impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK, 0);
 197 }
 198
 199 /*
 200  * Enable the relevant connector on the interface module.
 201  */
 202 static void impd1fb_clcd_enable(struct clcd_fb *fb)
 203 {
 204         impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK,
 205                         fb->panel->connector | IMPD1_CTRL_DISP_ENABLE);
 206 }
 207
 208 static int impd1fb_clcd_setup(struct clcd_fb *fb)
 209 {
 210         unsigned long framebase = fb->dev->res.start + 0x01000000;
 211         unsigned long framesize = SZ_1M;
 212         int ret = 0;
 213
 214         fb->panel = &PANELTYPE;
 215
 216         if (!request_mem_region(framebase, framesize, "clcd framebuffer")) {
 217                 printk(KERN_ERR "IM-PD1: unable to reserve framebuffer\n");
 218                 return -EBUSY;
 219         }
 220
 221         fb->fb.screen_base = ioremap(framebase, framesize);
 222         if (!fb->fb.screen_base) {
 223                 printk(KERN_ERR "IM-PD1: unable to map framebuffer\n");
 224                 ret = -ENOMEM;
 225                 goto free_buffer;
 226         }
 227
 228         fb->fb.fix.smem_start   = framebase;
 229         fb->fb.fix.smem_len     = framesize;
 230
 231         return 0;
 232
 233  free_buffer:
 234         release_mem_region(framebase, framesize);
 235         return ret;
 236 }
 237
 238 static int impd1fb_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
 239 {
 240         unsigned long start, size;
 241
 242         start = vma->vm_pgoff + (fb->fb.fix.smem_start >> PAGE_SHIFT);
 243         size = vma->vm_end - vma->vm_start;
 244
 245         return remap_pfn_range(vma, vma->vm_start, start, size,
 246                                vma->vm_page_prot);
 247 }
 248
 249 static void impd1fb_clcd_remove(struct clcd_fb *fb)
 250 {
 251         iounmap(fb->fb.screen_base);
 252         release_mem_region(fb->fb.fix.smem_start, fb->fb.fix.smem_len);
 253 }
 254
 255 static struct clcd_board impd1_clcd_data = {
 256         .name           = "IM-PD/1",
 257         .caps           = CLCD_CAP_5551 | CLCD_CAP_888,
 258         .check          = clcdfb_check,
 259         .decode         = clcdfb_decode,
 260         .disable        = impd1fb_clcd_disable,
 261         .enable         = impd1fb_clcd_enable,
 262         .setup          = impd1fb_clcd_setup,
 263         .mmap           = impd1fb_clcd_mmap,
 264         .remove         = impd1fb_clcd_remove,
 265 };
 266
 267 struct impd1_device {
 268         unsigned long   offset;
 269         unsigned int    irq[2];
 270         unsigned int    id;
 271         void            *platform_data;
 272 };
 273
 274 static struct impd1_device impd1_devs[] = {
 275         {
 276                 .offset = 0x00100000,
 277                 .irq    = { 1 },
 278                 .id     = 0x00141011,
 279         }, {
 280                 .offset = 0x00200000,
 281                 .irq    = { 2 },
 282                 .id     = 0x00141011,
 283         }, {
 284                 .offset = 0x00300000,
 285                 .irq    = { 3 },
 286                 .id     = 0x00041022,
 287         }, {
 288                 .offset = 0x00400000,
 289                 .irq    = { 4 },
 290                 .id     = 0x00041061,
 291         }, {
 292                 .offset = 0x00500000,
 293                 .irq    = { 5 },
 294                 .id     = 0x00041061,
 295         }, {
 296                 .offset = 0x00600000,
 297                 .irq    = { 6 },
 298                 .id     = 0x00041130,
 299         }, {
 300                 .offset = 0x00700000,
 301                 .irq    = { 7, 8 },
 302                 .id     = 0x00041181,
 303                 .platform_data = &mmc_data,
 304         }, {
 305                 .offset = 0x00800000,
 306                 .irq    = { 9 },
 307                 .id     = 0x00041041,
 308         }, {
 309                 .offset = 0x01000000,
 310                 .irq    = { 11 },
 311                 .id     = 0x00041110,
 312                 .platform_data = &impd1_clcd_data,
 313         }
 314 };
 315
 316 /*
 317  * Valid IRQs: 0 thru 9 and 11, 10 unused.
 318  */
 319 #define IMPD1_VALID_IRQS 0x00000bffU
 320
 321 /*
 322  * As this module is bool, it is OK to have this as __ref() - no
 323  * probe calls will be done after the initial system bootup, as devices
 324  * are discovered as part of the machine startup.
 325  */
 326 static int __ref impd1_probe(struct lm_device *dev)
 327 {
 328         struct impd1_module *impd1;
 329         int irq_base;
 330         int i;
 331
 332         if (dev->id != module_id)
 333                 return -EINVAL;
 334
 335         if (!devm_request_mem_region(&dev->dev, dev->resource.start,
 336                                      SZ_4K, "LM registers"))
 337                 return -EBUSY;
 338
 339         impd1 = devm_kzalloc(&dev->dev, sizeof(struct impd1_module),
 340                              GFP_KERNEL);
 341         if (!impd1)
 342                 return -ENOMEM;
 343
 344         impd1->base = devm_ioremap(&dev->dev, dev->resource.start, SZ_4K);
 345         if (!impd1->base)
 346                 return -ENOMEM;
 347
 348         integrator_impd1_clk_init(impd1->base, dev->id);
 349
 350         if (!devm_request_mem_region(&dev->dev,
 351                                      dev->resource.start + 0x03000000,
 352                                      SZ_4K, "VIC"))
 353                 return -EBUSY;
 354
 355         impd1->vic_base = devm_ioremap(&dev->dev,
 356                                        dev->resource.start + 0x03000000,
 357                                        SZ_4K);
 358         if (!impd1->vic_base)
 359                 return -ENOMEM;
 360
 361         irq_base = vic_init_cascaded(impd1->vic_base, dev->irq,
 362                                      IMPD1_VALID_IRQS, 0);
 363
 364         lm_set_drvdata(dev, impd1);
 365
 366         dev_info(&dev->dev, "IM-PD1 found at 0x%08lx\n",
 367                  (unsigned long)dev->resource.start);
 368
 369         for (i = 0; i < ARRAY_SIZE(impd1_devs); i++) {
 370                 struct impd1_device *idev = impd1_devs + i;
 371                 struct amba_device *d;
 372                 unsigned long pc_base;
 373                 char devname[32];
 374                 int irq1 = idev->irq[0];
 375                 int irq2 = idev->irq[1];
 376
 377                 /* Translate IRQs to IM-PD1 local numberspace */
 378                 if (irq1)
 379                         irq1 += irq_base;
 380                 if (irq2)
 381                         irq2 += irq_base;
 382
 383                 pc_base = dev->resource.start + idev->offset;
 384                 snprintf(devname, 32, "lm%x:%5.5lx", dev->id, idev->offset >> 12);
 385
 386                 /* Add GPIO descriptor lookup table for the PL061 block */
 387                 if (idev->offset == 0x00400000) {
 388                         struct gpiod_lookup_table *lookup;
 389                         char *chipname;
 390                         char *mmciname;
 391
 392                         lookup = devm_kzalloc(&dev->dev,
 393                                               sizeof(*lookup) + 3 * sizeof(struct gpiod_lookup),
 394                                               GFP_KERNEL);
 395                         chipname = devm_kstrdup(&dev->dev, devname, GFP_KERNEL);
 396                         mmciname = devm_kasprintf(&dev->dev, GFP_KERNEL,
 397                                                   "lm%x:00700", dev->id);
 398                         if (!lookup || !chipname || !mmciname)
 399                                 return -ENOMEM;
 400
 401                         lookup->dev_id = mmciname;
 402                         /*
 403                          * Offsets on GPIO block 1:
 404                          * 3 = MMC WP (write protect)
 405                          * 4 = MMC CD (card detect)
 406                          *
 407                          * Offsets on GPIO block 2:
 408                          * 0 = Up key
 409                          * 1 = Down key
 410                          * 2 = Left key
 411                          * 3 = Right key
 412                          * 4 = Key lower left
 413                          * 5 = Key lower right
 414                          */
 415                         /* We need the two MMCI GPIO entries */
 416                         lookup->table[0].chip_label = chipname;
 417                         lookup->table[0].chip_hwnum = 3;
 418                         lookup->table[0].con_id = "wp";
 419                         lookup->table[1].chip_label = chipname;
 420                         lookup->table[1].chip_hwnum = 4;
 421                         lookup->table[1].con_id = "cd";
 422                         lookup->table[1].flags = GPIO_ACTIVE_LOW;
 423                         gpiod_add_lookup_table(lookup);
 424                 }
 425
 426                 d = amba_ahb_device_add_res(&dev->dev, devname, pc_base, SZ_4K,
 427                                             irq1, irq2,
 428                                             idev->platform_data, idev->id,
 429                                             &dev->resource);
 430                 if (IS_ERR(d)) {
 431                         dev_err(&dev->dev, "unable to register device: %ld\n", PTR_ERR(d));
 432                         continue;
 433                 }
 434         }
 435
 436         return 0;
 437 }
 438
 439 static int impd1_remove_one(struct device *dev, void *data)
 440 {
 441         device_unregister(dev);
 442         return 0;
 443 }
 444
 445 static void impd1_remove(struct lm_device *dev)
 446 {
 447         device_for_each_child(&dev->dev, NULL, impd1_remove_one);
 448         integrator_impd1_clk_exit(dev->id);
 449
 450         lm_set_drvdata(dev, NULL);
 451 }
 452
 453 static struct lm_driver impd1_driver = {
 454         .drv = {
 455                 .name   = "impd1",
 456                 /*
 457                  * As we're dropping the probe() function, suppress driver
 458                  * binding from sysfs.
 459                  */
 460                 .suppress_bind_attrs = true,
 461         },
 462         .probe          = impd1_probe,
 463         .remove         = impd1_remove,
 464 };
 465
 466 static int __init impd1_init(void)
 467 {
 468         return lm_driver_register(&impd1_driver);
 469 }
 470
 471 static void __exit impd1_exit(void)
 472 {
 473         lm_driver_unregister(&impd1_driver);
 474 }
 475
 476 module_init(impd1_init);
 477 module_exit(impd1_exit);
 478
 479 MODULE_LICENSE("GPL");
 480 MODULE_DESCRIPTION("Integrator/IM-PD1 logic module core driver");
 481 MODULE_AUTHOR("Deep Blue Solutions Ltd");