drivers/video/mmp/hw/mmp_ctrl.c

   1 /*
   2  * linux/drivers/video/mmp/hw/mmp_ctrl.c
   3  * Marvell MMP series Display Controller support
   4  *
   5  * Copyright (C) 2012 Marvell Technology Group Ltd.
   6  * Authors:  Guoqing Li <ligq@marvell.com>
   7  *          Lisa Du <cldu@marvell.com>
   8  *          Zhou Zhu <zzhu3@marvell.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License as published by the
  12  * Free Software Foundation; either version 2 of the License, or (at your
  13  * option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful, but WITHOUT
  16  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  18  * more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along with
  21  * this program.  If not, see <http://www.gnu.org/licenses/>.
  22  *
  23  */
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <linux/kernel.h>
  27 #include <linux/errno.h>
  28 #include <linux/string.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/slab.h>
  31 #include <linux/delay.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/dma-mapping.h>
  34 #include <linux/clk.h>
  35 #include <linux/err.h>
  36 #include <linux/vmalloc.h>
  37 #include <linux/uaccess.h>
  38 #include <linux/kthread.h>
  39 #include <linux/io.h>
  40
  41 #include "mmp_ctrl.h"
  42
  43 static irqreturn_t ctrl_handle_irq(int irq, void *dev_id)
  44 {
  45         struct mmphw_ctrl *ctrl = (struct mmphw_ctrl *)dev_id;
  46         u32 isr, imask, tmp;
  47
  48         isr = readl_relaxed(ctrl->reg_base + SPU_IRQ_ISR);
  49         imask = readl_relaxed(ctrl->reg_base + SPU_IRQ_ENA);
  50
  51         do {
  52                 /* clear clock only */
  53                 tmp = readl_relaxed(ctrl->reg_base + SPU_IRQ_ISR);
  54                 if (tmp & isr)
  55                         writel_relaxed(~isr, ctrl->reg_base + SPU_IRQ_ISR);
  56         } while ((isr = readl_relaxed(ctrl->reg_base + SPU_IRQ_ISR)) & imask);
  57
  58         return IRQ_HANDLED;
  59 }
  60
  61 static u32 fmt_to_reg(struct mmp_overlay *overlay, int pix_fmt)
  62 {
  63         u32 rbswap = 0, uvswap = 0, yuvswap = 0,
  64                 csc_en = 0, val = 0,
  65                 vid = overlay_is_vid(overlay);
  66
  67         switch (pix_fmt) {
  68         case PIXFMT_RGB565:
  69         case PIXFMT_RGB1555:
  70         case PIXFMT_RGB888PACK:
  71         case PIXFMT_RGB888UNPACK:
  72         case PIXFMT_RGBA888:
  73                 rbswap = 1;
  74                 break;
  75         case PIXFMT_VYUY:
  76         case PIXFMT_YVU422P:
  77         case PIXFMT_YVU420P:
  78                 uvswap = 1;
  79                 break;
  80         case PIXFMT_YUYV:
  81                 yuvswap = 1;
  82                 break;
  83         default:
  84                 break;
  85         }
  86
  87         switch (pix_fmt) {
  88         case PIXFMT_RGB565:
  89         case PIXFMT_BGR565:
  90                 break;
  91         case PIXFMT_RGB1555:
  92         case PIXFMT_BGR1555:
  93                 val = 0x1;
  94                 break;
  95         case PIXFMT_RGB888PACK:
  96         case PIXFMT_BGR888PACK:
  97                 val = 0x2;
  98                 break;
  99         case PIXFMT_RGB888UNPACK:
 100         case PIXFMT_BGR888UNPACK:
 101                 val = 0x3;
 102                 break;
 103         case PIXFMT_RGBA888:
 104         case PIXFMT_BGRA888:
 105                 val = 0x4;
 106                 break;
 107         case PIXFMT_UYVY:
 108         case PIXFMT_VYUY:
 109         case PIXFMT_YUYV:
 110                 val = 0x5;
 111                 csc_en = 1;
 112                 break;
 113         case PIXFMT_YUV422P:
 114         case PIXFMT_YVU422P:
 115                 val = 0x6;
 116                 csc_en = 1;
 117                 break;
 118         case PIXFMT_YUV420P:
 119         case PIXFMT_YVU420P:
 120                 val = 0x7;
 121                 csc_en = 1;
 122                 break;
 123         default:
 124                 break;
 125         }
 126
 127         return (dma_palette(0) | dma_fmt(vid, val) |
 128                 dma_swaprb(vid, rbswap) | dma_swapuv(vid, uvswap) |
 129                 dma_swapyuv(vid, yuvswap) | dma_csc(vid, csc_en));
 130 }
 131
 132 static void dmafetch_set_fmt(struct mmp_overlay *overlay)
 133 {
 134         u32 tmp;
 135         struct mmp_path *path = overlay->path;
 136         tmp = readl_relaxed(ctrl_regs(path) + dma_ctrl(0, path->id));
 137         tmp &= ~dma_mask(overlay_is_vid(overlay));
 138         tmp |= fmt_to_reg(overlay, overlay->win.pix_fmt);
 139         writel_relaxed(tmp, ctrl_regs(path) + dma_ctrl(0, path->id));
 140 }
 141
 142 static void overlay_set_win(struct mmp_overlay *overlay, struct mmp_win *win)
 143 {
 144         struct lcd_regs *regs = path_regs(overlay->path);
 145
 146         /* assert win supported */
 147         memcpy(&overlay->win, win, sizeof(struct mmp_win));
 148
 149         mutex_lock(&overlay->access_ok);
 150
 151         if (overlay_is_vid(overlay)) {
 152                 writel_relaxed(win->pitch[0], &regs->v_pitch_yc);
 153                 writel_relaxed(win->pitch[2] << 16 |
 154                                 win->pitch[1], &regs->v_pitch_uv);
 155
 156                 writel_relaxed((win->ysrc << 16) | win->xsrc, &regs->v_size);
 157                 writel_relaxed((win->ydst << 16) | win->xdst, &regs->v_size_z);
 158                 writel_relaxed(win->ypos << 16 | win->xpos, &regs->v_start);
 159         } else {
 160                 writel_relaxed(win->pitch[0], &regs->g_pitch);
 161
 162                 writel_relaxed((win->ysrc << 16) | win->xsrc, &regs->g_size);
 163                 writel_relaxed((win->ydst << 16) | win->xdst, &regs->g_size_z);
 164                 writel_relaxed(win->ypos << 16 | win->xpos, &regs->g_start);
 165         }
 166
 167         dmafetch_set_fmt(overlay);
 168         mutex_unlock(&overlay->access_ok);
 169 }
 170
 171 static void dmafetch_onoff(struct mmp_overlay *overlay, int on)
 172 {
 173         u32 mask = overlay_is_vid(overlay) ? CFG_DMA_ENA_MASK :
 174                    CFG_GRA_ENA_MASK;
 175         u32 enable = overlay_is_vid(overlay) ? CFG_DMA_ENA(1) : CFG_GRA_ENA(1);
 176         u32 tmp;
 177         struct mmp_path *path = overlay->path;
 178
 179         mutex_lock(&overlay->access_ok);
 180         tmp = readl_relaxed(ctrl_regs(path) + dma_ctrl(0, path->id));
 181         tmp &= ~mask;
 182         tmp |= (on ? enable : 0);
 183         writel(tmp, ctrl_regs(path) + dma_ctrl(0, path->id));
 184         mutex_unlock(&overlay->access_ok);
 185 }
 186
 187 static void path_enabledisable(struct mmp_path *path, int on)
 188 {
 189         u32 tmp;
 190         mutex_lock(&path->access_ok);
 191         tmp = readl_relaxed(ctrl_regs(path) + LCD_SCLK(path));
 192         if (on)
 193                 tmp &= ~SCLK_DISABLE;
 194         else
 195                 tmp |= SCLK_DISABLE;
 196         writel_relaxed(tmp, ctrl_regs(path) + LCD_SCLK(path));
 197         mutex_unlock(&path->access_ok);
 198 }
 199
 200 static void path_onoff(struct mmp_path *path, int on)
 201 {
 202         if (path->status == on) {
 203                 dev_info(path->dev, "path %s is already %s\n",
 204                                 path->name, stat_name(path->status));
 205                 return;
 206         }
 207
 208         if (on) {
 209                 path_enabledisable(path, 1);
 210
 211                 if (path->panel && path->panel->set_onoff)
 212                         path->panel->set_onoff(path->panel, 1);
 213         } else {
 214                 if (path->panel && path->panel->set_onoff)
 215                         path->panel->set_onoff(path->panel, 0);
 216
 217                 path_enabledisable(path, 0);
 218         }
 219         path->status = on;
 220 }
 221
 222 static void overlay_set_onoff(struct mmp_overlay *overlay, int on)
 223 {
 224         if (overlay->status == on) {
 225                 dev_info(overlay_to_ctrl(overlay)->dev, "overlay %s is already %s\n",
 226                         overlay->path->name, stat_name(overlay->status));
 227                 return;
 228         }
 229         overlay->status = on;
 230         dmafetch_onoff(overlay, on);
 231         if (overlay->path->ops.check_status(overlay->path)
 232                         != overlay->path->status)
 233                 path_onoff(overlay->path, on);
 234 }
 235
 236 static void overlay_set_fetch(struct mmp_overlay *overlay, int fetch_id)
 237 {
 238         overlay->dmafetch_id = fetch_id;
 239 }
 240
 241 static int overlay_set_addr(struct mmp_overlay *overlay, struct mmp_addr *addr)
 242 {
 243         struct lcd_regs *regs = path_regs(overlay->path);
 244
 245         /* FIXME: assert addr supported */
 246         memcpy(&overlay->addr, addr, sizeof(struct mmp_addr));
 247
 248         if (overlay_is_vid(overlay)) {
 249                 writel_relaxed(addr->phys[0], &regs->v_y0);
 250                 writel_relaxed(addr->phys[1], &regs->v_u0);
 251                 writel_relaxed(addr->phys[2], &regs->v_v0);
 252         } else
 253                 writel_relaxed(addr->phys[0], &regs->g_0);
 254
 255         return overlay->addr.phys[0];
 256 }
 257
 258 static void path_set_mode(struct mmp_path *path, struct mmp_mode *mode)
 259 {
 260         struct lcd_regs *regs = path_regs(path);
 261         u32 total_x, total_y, vsync_ctrl, tmp, sclk_src, sclk_div,
 262                 link_config = path_to_path_plat(path)->link_config,
 263                 dsi_rbswap = path_to_path_plat(path)->link_config;
 264
 265         /* FIXME: assert videomode supported */
 266         memcpy(&path->mode, mode, sizeof(struct mmp_mode));
 267
 268         mutex_lock(&path->access_ok);
 269
 270         /* polarity of timing signals */
 271         tmp = readl_relaxed(ctrl_regs(path) + intf_ctrl(path->id)) & 0x1;
 272         tmp |= mode->vsync_invert ? 0 : 0x8;
 273         tmp |= mode->hsync_invert ? 0 : 0x4;
 274         tmp |= link_config & CFG_DUMBMODE_MASK;
 275         tmp |= CFG_DUMB_ENA(1);
 276         writel_relaxed(tmp, ctrl_regs(path) + intf_ctrl(path->id));
 277
 278         /* interface rb_swap setting */
 279         tmp = readl_relaxed(ctrl_regs(path) + intf_rbswap_ctrl(path->id)) &
 280                 (~(CFG_INTFRBSWAP_MASK));
 281         tmp |= dsi_rbswap & CFG_INTFRBSWAP_MASK;
 282         writel_relaxed(tmp, ctrl_regs(path) + intf_rbswap_ctrl(path->id));
 283
 284         writel_relaxed((mode->yres << 16) | mode->xres, &regs->screen_active);
 285         writel_relaxed((mode->left_margin << 16) | mode->right_margin,
 286                 &regs->screen_h_porch);
 287         writel_relaxed((mode->upper_margin << 16) | mode->lower_margin,
 288                 &regs->screen_v_porch);
 289         total_x = mode->xres + mode->left_margin + mode->right_margin +
 290                 mode->hsync_len;
 291         total_y = mode->yres + mode->upper_margin + mode->lower_margin +
 292                 mode->vsync_len;
 293         writel_relaxed((total_y << 16) | total_x, &regs->screen_size);
 294
 295         /* vsync ctrl */
 296         if (path->output_type == PATH_OUT_DSI)
 297                 vsync_ctrl = 0x01330133;
 298         else
 299                 vsync_ctrl = ((mode->xres + mode->right_margin) << 16)
 300                                         | (mode->xres + mode->right_margin);
 301         writel_relaxed(vsync_ctrl, &regs->vsync_ctrl);
 302
 303         /* set pixclock div */
 304         sclk_src = clk_get_rate(path_to_ctrl(path)->clk);
 305         sclk_div = sclk_src / mode->pixclock_freq;
 306         if (sclk_div * mode->pixclock_freq < sclk_src)
 307                 sclk_div++;
 308
 309         dev_info(path->dev, "%s sclk_src %d sclk_div 0x%x pclk %d\n",
 310                         __func__, sclk_src, sclk_div, mode->pixclock_freq);
 311
 312         tmp = readl_relaxed(ctrl_regs(path) + LCD_SCLK(path));
 313         tmp &= ~CLK_INT_DIV_MASK;
 314         tmp |= sclk_div;
 315         writel_relaxed(tmp, ctrl_regs(path) + LCD_SCLK(path));
 316
 317         mutex_unlock(&path->access_ok);
 318 }
 319
 320 static struct mmp_overlay_ops mmphw_overlay_ops = {
 321         .set_fetch = overlay_set_fetch,
 322         .set_onoff = overlay_set_onoff,
 323         .set_win = overlay_set_win,
 324         .set_addr = overlay_set_addr,
 325 };
 326
 327 static void ctrl_set_default(struct mmphw_ctrl *ctrl)
 328 {
 329         u32 tmp, irq_mask;
 330
 331         /*
 332          * LCD Global control(LCD_TOP_CTRL) should be configed before
 333          * any other LCD registers read/write, or there maybe issues.
 334          */
 335         tmp = readl_relaxed(ctrl->reg_base + LCD_TOP_CTRL);
 336         tmp |= 0xfff0;
 337         writel_relaxed(tmp, ctrl->reg_base + LCD_TOP_CTRL);
 338
 339
 340         /* disable all interrupts */
 341         irq_mask = path_imasks(0) | err_imask(0) |
 342                    path_imasks(1) | err_imask(1);
 343         tmp = readl_relaxed(ctrl->reg_base + SPU_IRQ_ENA);
 344         tmp &= ~irq_mask;
 345         tmp |= irq_mask;
 346         writel_relaxed(tmp, ctrl->reg_base + SPU_IRQ_ENA);
 347 }
 348
 349 static void path_set_default(struct mmp_path *path)
 350 {
 351         struct lcd_regs *regs = path_regs(path);
 352         u32 dma_ctrl1, mask, tmp, path_config;
 353
 354         path_config = path_to_path_plat(path)->path_config;
 355
 356         /* Configure IOPAD: should be parallel only */
 357         if (PATH_OUT_PARALLEL == path->output_type) {
 358                 mask = CFG_IOPADMODE_MASK | CFG_BURST_MASK | CFG_BOUNDARY_MASK;
 359                 tmp = readl_relaxed(ctrl_regs(path) + SPU_IOPAD_CONTROL);
 360                 tmp &= ~mask;
 361                 tmp |= path_config;
 362                 writel_relaxed(tmp, ctrl_regs(path) + SPU_IOPAD_CONTROL);
 363         }
 364
 365         /* Select path clock source */
 366         tmp = readl_relaxed(ctrl_regs(path) + LCD_SCLK(path));
 367         tmp &= ~SCLK_SRC_SEL_MASK;
 368         tmp |= path_config;
 369         writel_relaxed(tmp, ctrl_regs(path) + LCD_SCLK(path));
 370
 371         /*
 372          * Configure default bits: vsync triggers DMA,
 373          * power save enable, configure alpha registers to
 374          * display 100% graphics, and set pixel command.
 375          */
 376         dma_ctrl1 = 0x2032ff81;
 377
 378         dma_ctrl1 |= CFG_VSYNC_INV_MASK;
 379         writel_relaxed(dma_ctrl1, ctrl_regs(path) + dma_ctrl(1, path->id));
 380
 381         /* Configure default register values */
 382         writel_relaxed(0x00000000, &regs->blank_color);
 383         writel_relaxed(0x00000000, &regs->g_1);
 384         writel_relaxed(0x00000000, &regs->g_start);
 385
 386         /*
 387          * 1.enable multiple burst request in DMA AXI
 388          * bus arbiter for faster read if not tv path;
 389          * 2.enable horizontal smooth filter;
 390          */
 391         mask = CFG_GRA_HSMOOTH_MASK | CFG_DMA_HSMOOTH_MASK | CFG_ARBFAST_ENA(1);
 392         tmp = readl_relaxed(ctrl_regs(path) + dma_ctrl(0, path->id));
 393         tmp |= mask;
 394         if (PATH_TV == path->id)
 395                 tmp &= ~CFG_ARBFAST_ENA(1);
 396         writel_relaxed(tmp, ctrl_regs(path) + dma_ctrl(0, path->id));
 397 }
 398
 399 static int path_init(struct mmphw_path_plat *path_plat,
 400                 struct mmp_mach_path_config *config)
 401 {
 402         struct mmphw_ctrl *ctrl = path_plat->ctrl;
 403         struct mmp_path_info *path_info;
 404         struct mmp_path *path = NULL;
 405
 406         dev_info(ctrl->dev, "%s: %s\n", __func__, config->name);
 407
 408         /* init driver data */
 409         path_info = kzalloc(sizeof(struct mmp_path_info), GFP_KERNEL);
 410         if (!path_info) {
 411                 dev_err(ctrl->dev, "%s: unable to alloc path_info for %s\n",
 412                                 __func__, config->name);
 413                 return 0;
 414         }
 415         path_info->name = config->name;
 416         path_info->id = path_plat->id;
 417         path_info->dev = ctrl->dev;
 418         path_info->overlay_num = config->overlay_num;
 419         path_info->overlay_ops = &mmphw_overlay_ops;
 420         path_info->set_mode = path_set_mode;
 421         path_info->plat_data = path_plat;
 422
 423         /* create/register platform device */
 424         path = mmp_register_path(path_info);
 425         if (!path) {
 426                 kfree(path_info);
 427                 return 0;
 428         }
 429         path_plat->path = path;
 430         path_plat->path_config = config->path_config;
 431         path_plat->link_config = config->link_config;
 432         path_plat->dsi_rbswap = config->dsi_rbswap;
 433         path_set_default(path);
 434
 435         kfree(path_info);
 436         return 1;
 437 }
 438
 439 static void path_deinit(struct mmphw_path_plat *path_plat)
 440 {
 441         if (!path_plat)
 442                 return;
 443
 444         if (path_plat->path)
 445                 mmp_unregister_path(path_plat->path);
 446 }
 447
 448 static int mmphw_probe(struct platform_device *pdev)
 449 {
 450         struct mmp_mach_plat_info *mi;
 451         struct resource *res;
 452         int ret, i, size, irq;
 453         struct mmphw_path_plat *path_plat;
 454         struct mmphw_ctrl *ctrl = NULL;
 455
 456         /* get resources from platform data */
 457         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 458         if (res == NULL) {
 459                 dev_err(&pdev->dev, "%s: no IO memory defined\n", __func__);
 460                 ret = -ENOENT;
 461                 goto failed;
 462         }
 463
 464         irq = platform_get_irq(pdev, 0);
 465         if (irq < 0) {
 466                 dev_err(&pdev->dev, "%s: no IRQ defined\n", __func__);
 467                 ret = -ENOENT;
 468                 goto failed;
 469         }
 470
 471         /* get configs from platform data */
 472         mi = pdev->dev.platform_data;
 473         if (mi == NULL || !mi->path_num || !mi->paths) {
 474                 dev_err(&pdev->dev, "%s: no platform data defined\n", __func__);
 475                 ret = -EINVAL;
 476                 goto failed;
 477         }
 478
 479         /* allocate */
 480         size = sizeof(struct mmphw_ctrl) + sizeof(struct mmphw_path_plat) *
 481                mi->path_num;
 482         ctrl = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
 483         if (!ctrl) {
 484                 ret = -ENOMEM;
 485                 goto failed;
 486         }
 487
 488         ctrl->name = mi->name;
 489         ctrl->path_num = mi->path_num;
 490         ctrl->dev = &pdev->dev;
 491         ctrl->irq = irq;
 492         platform_set_drvdata(pdev, ctrl);
 493         mutex_init(&ctrl->access_ok);
 494
 495         /* map registers.*/
 496         if (!devm_request_mem_region(ctrl->dev, res->start,
 497                         resource_size(res), ctrl->name)) {
 498                 dev_err(ctrl->dev,
 499                         "can't request region for resource %pR\n", res);
 500                 ret = -EINVAL;
 501                 goto failed;
 502         }
 503
 504         ctrl->reg_base = devm_ioremap_nocache(ctrl->dev,
 505                         res->start, resource_size(res));
 506         if (ctrl->reg_base == NULL) {
 507                 dev_err(ctrl->dev, "%s: res %x - %x map failed\n", __func__,
 508                         res->start, res->end);
 509                 ret = -ENOMEM;
 510                 goto failed;
 511         }
 512
 513         /* request irq */
 514         ret = devm_request_irq(ctrl->dev, ctrl->irq, ctrl_handle_irq,
 515                 IRQF_SHARED, "lcd_controller", ctrl);
 516         if (ret < 0) {
 517                 dev_err(ctrl->dev, "%s unable to request IRQ %d\n",
 518                                 __func__, ctrl->irq);
 519                 ret = -ENXIO;
 520                 goto failed;
 521         }
 522
 523         /* get clock */
 524         ctrl->clk = devm_clk_get(ctrl->dev, mi->clk_name);
 525         if (IS_ERR(ctrl->clk)) {
 526                 dev_err(ctrl->dev, "unable to get clk %s\n", mi->clk_name);
 527                 ret = -ENOENT;
 528                 goto failed;
 529         }
 530         clk_prepare_enable(ctrl->clk);
 531
 532         /* init global regs */
 533         ctrl_set_default(ctrl);
 534
 535         /* init pathes from machine info and register them */
 536         for (i = 0; i < ctrl->path_num; i++) {
 537                 /* get from config and machine info */
 538                 path_plat = &ctrl->path_plats[i];
 539                 path_plat->id = i;
 540                 path_plat->ctrl = ctrl;
 541
 542                 /* path init */
 543                 if (!path_init(path_plat, &mi->paths[i])) {
 544                         ret = -EINVAL;
 545                         goto failed_path_init;
 546                 }
 547         }
 548
 549 #ifdef CONFIG_MMP_DISP_SPI
 550         ret = lcd_spi_register(ctrl);
 551         if (ret < 0)
 552                 goto failed_path_init;
 553 #endif
 554
 555         dev_info(ctrl->dev, "device init done\n");
 556
 557         return 0;
 558
 559 failed_path_init:
 560         for (i = 0; i < ctrl->path_num; i++) {
 561                 path_plat = &ctrl->path_plats[i];
 562                 path_deinit(path_plat);
 563         }
 564
 565         clk_disable_unprepare(ctrl->clk);
 566 failed:
 567         dev_err(&pdev->dev, "device init failed\n");
 568
 569         return ret;
 570 }
 571
 572 static struct platform_driver mmphw_driver = {
 573         .driver         = {
 574                 .name   = "mmp-disp",
 575                 .owner  = THIS_MODULE,
 576         },
 577         .probe          = mmphw_probe,
 578 };
 579
 580 static int mmphw_init(void)
 581 {
 582         return platform_driver_register(&mmphw_driver);
 583 }
 584 module_init(mmphw_init);
 585
 586 MODULE_AUTHOR("Li Guoqing<ligq@marvell.com>");
 587 MODULE_DESCRIPTION("Framebuffer driver for mmp");
 588 MODULE_LICENSE("GPL");