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/amba/pl061.h>
  25 #include <linux/io.h>
  26 #include <linux/platform_data/clk-integrator.h>
  27 #include <linux/slab.h>
  28 #include <linux/irqchip/arm-vic.h>
  29 #include <linux/gpio/machine.h>
  30
  31 #include <asm/sizes.h>
  32 #include "lm.h"
  33 #include "impd1.h"
  34
  35 static int module_id;
  36
  37 module_param_named(lmid, module_id, int, 0444);
  38 MODULE_PARM_DESC(lmid, "logic module stack position");
  39
  40 struct impd1_module {
  41         void __iomem    *base;
  42         void __iomem    *vic_base;
  43 };
  44
  45 void impd1_tweak_control(struct device *dev, u32 mask, u32 val)
  46 {
  47         struct impd1_module *impd1 = dev_get_drvdata(dev);
  48         u32 cur;
  49
  50         val &= mask;
  51         cur = readl(impd1->base + IMPD1_CTRL) & ~mask;
  52         writel(cur | val, impd1->base + IMPD1_CTRL);
  53 }
  54
  55 EXPORT_SYMBOL(impd1_tweak_control);
  56
  57 /*
  58  * MMC support
  59  */
  60 static struct mmci_platform_data mmc_data = {
  61         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
  62 };
  63
  64 /*
  65  * CLCD support
  66  */
  67 #define PANEL           PROSPECTOR
  68
  69 #define LTM10C209               1
  70 #define PROSPECTOR              2
  71 #define SVGA                    3
  72 #define VGA                     4
  73
  74 #if PANEL == VGA
  75 #define PANELTYPE       vga
  76 static struct clcd_panel vga = {
  77         .mode           = {
  78                 .name           = "VGA",
  79                 .refresh        = 60,
  80                 .xres           = 640,
  81                 .yres           = 480,
  82                 .pixclock       = 39721,
  83                 .left_margin    = 40,
  84                 .right_margin   = 24,
  85                 .upper_margin   = 32,
  86                 .lower_margin   = 11,
  87                 .hsync_len      = 96,
  88                 .vsync_len      = 2,
  89                 .sync           = 0,
  90                 .vmode          = FB_VMODE_NONINTERLACED,
  91         },
  92         .width          = -1,
  93         .height         = -1,
  94         .tim2           = TIM2_BCD | TIM2_IPC,
  95         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
  96         .caps           = CLCD_CAP_5551,
  97         .connector      = IMPD1_CTRL_DISP_VGA,
  98         .bpp            = 16,
  99         .grayscale      = 0,
 100 };
 101
 102 #elif PANEL == SVGA
 103 #define PANELTYPE       svga
 104 static struct clcd_panel svga = {
 105         .mode           = {
 106                 .name           = "SVGA",
 107                 .refresh        = 0,
 108                 .xres           = 800,
 109                 .yres           = 600,
 110                 .pixclock       = 27778,
 111                 .left_margin    = 20,
 112                 .right_margin   = 20,
 113                 .upper_margin   = 5,
 114                 .lower_margin   = 5,
 115                 .hsync_len      = 164,
 116                 .vsync_len      = 62,
 117                 .sync           = 0,
 118                 .vmode          = FB_VMODE_NONINTERLACED,
 119         },
 120         .width          = -1,
 121         .height         = -1,
 122         .tim2           = TIM2_BCD,
 123         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 124         .connector      = IMPD1_CTRL_DISP_VGA,
 125         .caps           = CLCD_CAP_5551,
 126         .bpp            = 16,
 127         .grayscale      = 0,
 128 };
 129
 130 #elif PANEL == PROSPECTOR
 131 #define PANELTYPE       prospector
 132 static struct clcd_panel prospector = {
 133         .mode           = {
 134                 .name           = "PROSPECTOR",
 135                 .refresh        = 0,
 136                 .xres           = 640,
 137                 .yres           = 480,
 138                 .pixclock       = 40000,
 139                 .left_margin    = 33,
 140                 .right_margin   = 64,
 141                 .upper_margin   = 36,
 142                 .lower_margin   = 7,
 143                 .hsync_len      = 64,
 144                 .vsync_len      = 25,
 145                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 146                 .vmode          = FB_VMODE_NONINTERLACED,
 147         },
 148         .width          = -1,
 149         .height         = -1,
 150         .tim2           = TIM2_BCD,
 151         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 152         .caps           = CLCD_CAP_5551,
 153         .fixedtimings   = 1,
 154         .connector      = IMPD1_CTRL_DISP_LCD,
 155         .bpp            = 16,
 156         .grayscale      = 0,
 157 };
 158
 159 #elif PANEL == LTM10C209
 160 #define PANELTYPE       ltm10c209
 161 /*
 162  * Untested.
 163  */
 164 static struct clcd_panel ltm10c209 = {
 165         .mode           = {
 166                 .name           = "LTM10C209",
 167                 .refresh        = 0,
 168                 .xres           = 640,
 169                 .yres           = 480,
 170                 .pixclock       = 40000,
 171                 .left_margin    = 20,
 172                 .right_margin   = 20,
 173                 .upper_margin   = 19,
 174                 .lower_margin   = 19,
 175                 .hsync_len      = 20,
 176                 .vsync_len      = 10,
 177                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 178                 .vmode          = FB_VMODE_NONINTERLACED,
 179         },
 180         .width          = -1,
 181         .height         = -1,
 182         .tim2           = TIM2_BCD,
 183         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 184         .caps           = CLCD_CAP_5551,
 185         .fixedtimings   = 1,
 186         .connector      = IMPD1_CTRL_DISP_LCD,
 187         .bpp            = 16,
 188         .grayscale      = 0,
 189 };
 190 #endif
 191
 192 /*
 193  * Disable all display connectors on the interface module.
 194  */
 195 static void impd1fb_clcd_disable(struct clcd_fb *fb)
 196 {
 197         impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK, 0);
 198 }
 199
 200 /*
 201  * Enable the relevant connector on the interface module.
 202  */
 203 static void impd1fb_clcd_enable(struct clcd_fb *fb)
 204 {
 205         impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK,
 206                         fb->panel->connector | IMPD1_CTRL_DISP_ENABLE);
 207 }
 208
 209 static int impd1fb_clcd_setup(struct clcd_fb *fb)
 210 {
 211         unsigned long framebase = fb->dev->res.start + 0x01000000;
 212         unsigned long framesize = SZ_1M;
 213         int ret = 0;
 214
 215         fb->panel = &PANELTYPE;
 216
 217         if (!request_mem_region(framebase, framesize, "clcd framebuffer")) {
 218                 printk(KERN_ERR "IM-PD1: unable to reserve framebuffer\n");
 219                 return -EBUSY;
 220         }
 221
 222         fb->fb.screen_base = ioremap(framebase, framesize);
 223         if (!fb->fb.screen_base) {
 224                 printk(KERN_ERR "IM-PD1: unable to map framebuffer\n");
 225                 ret = -ENOMEM;
 226                 goto free_buffer;
 227         }
 228
 229         fb->fb.fix.smem_start   = framebase;
 230         fb->fb.fix.smem_len     = framesize;
 231
 232         return 0;
 233
 234  free_buffer:
 235         release_mem_region(framebase, framesize);
 236         return ret;
 237 }
 238
 239 static int impd1fb_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
 240 {
 241         unsigned long start, size;
 242
 243         start = vma->vm_pgoff + (fb->fb.fix.smem_start >> PAGE_SHIFT);
 244         size = vma->vm_end - vma->vm_start;
 245
 246         return remap_pfn_range(vma, vma->vm_start, start, size,
 247                                vma->vm_page_prot);
 248 }
 249
 250 static void impd1fb_clcd_remove(struct clcd_fb *fb)
 251 {
 252         iounmap(fb->fb.screen_base);
 253         release_mem_region(fb->fb.fix.smem_start, fb->fb.fix.smem_len);
 254 }
 255
 256 static struct clcd_board impd1_clcd_data = {
 257         .name           = "IM-PD/1",
 258         .caps           = CLCD_CAP_5551 | CLCD_CAP_888,
 259         .check          = clcdfb_check,
 260         .decode         = clcdfb_decode,
 261         .disable        = impd1fb_clcd_disable,
 262         .enable         = impd1fb_clcd_enable,
 263         .setup          = impd1fb_clcd_setup,
 264         .mmap           = impd1fb_clcd_mmap,
 265         .remove         = impd1fb_clcd_remove,
 266 };
 267
 268 struct impd1_device {
 269         unsigned long   offset;
 270         unsigned int    irq[2];
 271         unsigned int    id;
 272         void            *platform_data;
 273 };
 274
 275 static struct impd1_device impd1_devs[] = {
 276         {
 277                 .offset = 0x00100000,
 278                 .irq    = { 1 },
 279                 .id     = 0x00141011,
 280         }, {
 281                 .offset = 0x00200000,
 282                 .irq    = { 2 },
 283                 .id     = 0x00141011,
 284         }, {
 285                 .offset = 0x00300000,
 286                 .irq    = { 3 },
 287                 .id     = 0x00041022,
 288         }, {
 289                 .offset = 0x00400000,
 290                 .irq    = { 4 },
 291                 .id     = 0x00041061,
 292         }, {
 293                 .offset = 0x00500000,
 294                 .irq    = { 5 },
 295                 .id     = 0x00041061,
 296         }, {
 297                 .offset = 0x00600000,
 298                 .irq    = { 6 },
 299                 .id     = 0x00041130,
 300         }, {
 301                 .offset = 0x00700000,
 302                 .irq    = { 7, 8 },
 303                 .id     = 0x00041181,
 304                 .platform_data = &mmc_data,
 305         }, {
 306                 .offset = 0x00800000,
 307                 .irq    = { 9 },
 308                 .id     = 0x00041041,
 309         }, {
 310                 .offset = 0x01000000,
 311                 .irq    = { 11 },
 312                 .id     = 0x00041110,
 313                 .platform_data = &impd1_clcd_data,
 314         }
 315 };
 316
 317 /*
 318  * Valid IRQs: 0 thru 9 and 11, 10 unused.
 319  */
 320 #define IMPD1_VALID_IRQS 0x00000bffU
 321
 322 /*
 323  * As this module is bool, it is OK to have this as __ref() - no
 324  * probe calls will be done after the initial system bootup, as devices
 325  * are discovered as part of the machine startup.
 326  */
 327 static int __ref impd1_probe(struct lm_device *dev)
 328 {
 329         struct impd1_module *impd1;
 330         int irq_base;
 331         int i;
 332
 333         if (dev->id != module_id)
 334                 return -EINVAL;
 335
 336         if (!devm_request_mem_region(&dev->dev, dev->resource.start,
 337                                      SZ_4K, "LM registers"))
 338                 return -EBUSY;
 339
 340         impd1 = devm_kzalloc(&dev->dev, sizeof(struct impd1_module),
 341                              GFP_KERNEL);
 342         if (!impd1)
 343                 return -ENOMEM;
 344
 345         impd1->base = devm_ioremap(&dev->dev, dev->resource.start, SZ_4K);
 346         if (!impd1->base)
 347                 return -ENOMEM;
 348
 349         integrator_impd1_clk_init(impd1->base, dev->id);
 350
 351         if (!devm_request_mem_region(&dev->dev,
 352                                      dev->resource.start + 0x03000000,
 353                                      SZ_4K, "VIC"))
 354                 return -EBUSY;
 355
 356         impd1->vic_base = devm_ioremap(&dev->dev,
 357                                        dev->resource.start + 0x03000000,
 358                                        SZ_4K);
 359         if (!impd1->vic_base)
 360                 return -ENOMEM;
 361
 362         irq_base = vic_init_cascaded(impd1->vic_base, dev->irq,
 363                                      IMPD1_VALID_IRQS, 0);
 364
 365         lm_set_drvdata(dev, impd1);
 366
 367         dev_info(&dev->dev, "IM-PD1 found at 0x%08lx\n",
 368                  (unsigned long)dev->resource.start);
 369
 370         for (i = 0; i < ARRAY_SIZE(impd1_devs); i++) {
 371                 struct impd1_device *idev = impd1_devs + i;
 372                 struct amba_device *d;
 373                 unsigned long pc_base;
 374                 char devname[32];
 375                 int irq1 = idev->irq[0];
 376                 int irq2 = idev->irq[1];
 377
 378                 /* Translate IRQs to IM-PD1 local numberspace */
 379                 if (irq1)
 380                         irq1 += irq_base;
 381                 if (irq2)
 382                         irq2 += irq_base;
 383
 384                 pc_base = dev->resource.start + idev->offset;
 385                 snprintf(devname, 32, "lm%x:%5.5lx", dev->id, idev->offset >> 12);
 386
 387                 /* Add GPIO descriptor lookup table for the PL061 block */
 388                 if (idev->offset == 0x00400000) {
 389                         struct gpiod_lookup_table *lookup;
 390                         char *chipname;
 391                         char *mmciname;
 392
 393                         lookup = devm_kzalloc(&dev->dev,
 394                                               sizeof(*lookup) + 3 * sizeof(struct gpiod_lookup),
 395                                               GFP_KERNEL);
 396                         chipname = devm_kstrdup(&dev->dev, devname, GFP_KERNEL);
 397                         mmciname = kasprintf(GFP_KERNEL, "lm%x:00700", dev->id);
 398                         lookup->dev_id = mmciname;
 399                         /*
 400                          * Offsets on GPIO block 1:
 401                          * 3 = MMC WP (write protect)
 402                          * 4 = MMC CD (card detect)
 403                          *
 404                          * Offsets on GPIO block 2:
 405                          * 0 = Up key
 406                          * 1 = Down key
 407                          * 2 = Left key
 408                          * 3 = Right key
 409                          * 4 = Key lower left
 410                          * 5 = Key lower right
 411                          */
 412                         /* We need the two MMCI GPIO entries */
 413                         lookup->table[0].chip_label = chipname;
 414                         lookup->table[0].chip_hwnum = 3;
 415                         lookup->table[0].con_id = "wp";
 416                         lookup->table[1].chip_label = chipname;
 417                         lookup->table[1].chip_hwnum = 4;
 418                         lookup->table[1].con_id = "cd";
 419                         lookup->table[1].flags = GPIO_ACTIVE_LOW;
 420                         gpiod_add_lookup_table(lookup);
 421                 }
 422
 423                 d = amba_ahb_device_add_res(&dev->dev, devname, pc_base, SZ_4K,
 424                                             irq1, irq2,
 425                                             idev->platform_data, idev->id,
 426                                             &dev->resource);
 427                 if (IS_ERR(d)) {
 428                         dev_err(&dev->dev, "unable to register device: %ld\n", PTR_ERR(d));
 429                         continue;
 430                 }
 431         }
 432
 433         return 0;
 434 }
 435
 436 static int impd1_remove_one(struct device *dev, void *data)
 437 {
 438         device_unregister(dev);
 439         return 0;
 440 }
 441
 442 static void impd1_remove(struct lm_device *dev)
 443 {
 444         device_for_each_child(&dev->dev, NULL, impd1_remove_one);
 445         integrator_impd1_clk_exit(dev->id);
 446
 447         lm_set_drvdata(dev, NULL);
 448 }
 449
 450 static struct lm_driver impd1_driver = {
 451         .drv = {
 452                 .name   = "impd1",
 453                 /*
 454                  * As we're dropping the probe() function, suppress driver
 455                  * binding from sysfs.
 456                  */
 457                 .suppress_bind_attrs = true,
 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");