drivers/video/fbdev/mmp/hw/mmp_ctrl.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * linux/drivers/video/mmp/hw/mmp_ctrl.c
   4  * Marvell MMP series Display Controller support
   5  *
   6  * Copyright (C) 2012 Marvell Technology Group Ltd.
   7  * Authors:  Guoqing Li <ligq@marvell.com>
   8  *          Lisa Du <cldu@marvell.com>
   9  *          Zhou Zhu <zzhu3@marvell.com>
  10  */
  11 #include <linux/module.h>
  12 #include <linux/moduleparam.h>
  13 #include <linux/kernel.h>
  14 #include <linux/errno.h>
  15 #include <linux/string.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/slab.h>
  18 #include <linux/delay.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/dma-mapping.h>
  21 #include <linux/clk.h>
  22 #include <linux/err.h>
  23 #include <linux/vmalloc.h>
  24 #include <linux/uaccess.h>
  25 #include <linux/kthread.h>
  26 #include <linux/io.h>
  27
  28 #include "mmp_ctrl.h"
  29
  30 static irqreturn_t ctrl_handle_irq(int irq, void *dev_id)
  31 {
  32         struct mmphw_ctrl *ctrl = (struct mmphw_ctrl *)dev_id;
  33         u32 isr, imask, tmp;
  34
  35         isr = readl_relaxed(ctrl->reg_base + SPU_IRQ_ISR);
  36         imask = readl_relaxed(ctrl->reg_base + SPU_IRQ_ENA);
  37
  38         do {
  39                 /* clear clock only */
  40                 tmp = readl_relaxed(ctrl->reg_base + SPU_IRQ_ISR);
  41                 if (tmp & isr)
  42                         writel_relaxed(~isr, ctrl->reg_base + SPU_IRQ_ISR);
  43         } while ((isr = readl_relaxed(ctrl->reg_base + SPU_IRQ_ISR)) & imask);
  44
  45         return IRQ_HANDLED;
  46 }
  47
  48 static u32 fmt_to_reg(struct mmp_overlay *overlay, int pix_fmt)
  49 {
  50         u32 rbswap = 0, uvswap = 0, yuvswap = 0,
  51                 csc_en = 0, val = 0,
  52                 vid = overlay_is_vid(overlay);
  53
  54         switch (pix_fmt) {
  55         case PIXFMT_RGB565:
  56         case PIXFMT_RGB1555:
  57         case PIXFMT_RGB888PACK:
  58         case PIXFMT_RGB888UNPACK:
  59         case PIXFMT_RGBA888:
  60                 rbswap = 1;
  61                 break;
  62         case PIXFMT_VYUY:
  63         case PIXFMT_YVU422P:
  64         case PIXFMT_YVU420P:
  65                 uvswap = 1;
  66                 break;
  67         case PIXFMT_YUYV:
  68                 yuvswap = 1;
  69                 break;
  70         default:
  71                 break;
  72         }
  73
  74         switch (pix_fmt) {
  75         case PIXFMT_RGB565:
  76         case PIXFMT_BGR565:
  77                 break;
  78         case PIXFMT_RGB1555:
  79         case PIXFMT_BGR1555:
  80                 val = 0x1;
  81                 break;
  82         case PIXFMT_RGB888PACK:
  83         case PIXFMT_BGR888PACK:
  84                 val = 0x2;
  85                 break;
  86         case PIXFMT_RGB888UNPACK:
  87         case PIXFMT_BGR888UNPACK:
  88                 val = 0x3;
  89                 break;
  90         case PIXFMT_RGBA888:
  91         case PIXFMT_BGRA888:
  92                 val = 0x4;
  93                 break;
  94         case PIXFMT_UYVY:
  95         case PIXFMT_VYUY:
  96         case PIXFMT_YUYV:
  97                 val = 0x5;
  98                 csc_en = 1;
  99                 break;
 100         case PIXFMT_YUV422P:
 101         case PIXFMT_YVU422P:
 102                 val = 0x6;
 103                 csc_en = 1;
 104                 break;
 105         case PIXFMT_YUV420P:
 106         case PIXFMT_YVU420P:
 107                 val = 0x7;
 108                 csc_en = 1;
 109                 break;
 110         default:
 111                 break;
 112         }
 113
 114         return (dma_palette(0) | dma_fmt(vid, val) |
 115                 dma_swaprb(vid, rbswap) | dma_swapuv(vid, uvswap) |
 116                 dma_swapyuv(vid, yuvswap) | dma_csc(vid, csc_en));
 117 }
 118
 119 static void dmafetch_set_fmt(struct mmp_overlay *overlay)
 120 {
 121         u32 tmp;
 122         struct mmp_path *path = overlay->path;
 123         tmp = readl_relaxed(ctrl_regs(path) + dma_ctrl(0, path->id));
 124         tmp &= ~dma_mask(overlay_is_vid(overlay));
 125         tmp |= fmt_to_reg(overlay, overlay->win.pix_fmt);
 126         writel_relaxed(tmp, ctrl_regs(path) + dma_ctrl(0, path->id));
 127 }
 128
 129 static void overlay_set_win(struct mmp_overlay *overlay, struct mmp_win *win)
 130 {
 131         struct lcd_regs *regs = path_regs(overlay->path);
 132
 133         /* assert win supported */
 134         memcpy(&overlay->win, win, sizeof(struct mmp_win));
 135
 136         mutex_lock(&overlay->access_ok);
 137
 138         if (overlay_is_vid(overlay)) {
 139                 writel_relaxed(win->pitch[0],
 140                                 (void __iomem *)&regs->v_pitch_yc);
 141                 writel_relaxed(win->pitch[2] << 16 | win->pitch[1],
 142                                 (void __iomem *)&regs->v_pitch_uv);
 143
 144                 writel_relaxed((win->ysrc << 16) | win->xsrc,
 145                                 (void __iomem *)&regs->v_size);
 146                 writel_relaxed((win->ydst << 16) | win->xdst,
 147                                 (void __iomem *)&regs->v_size_z);
 148                 writel_relaxed(win->ypos << 16 | win->xpos,
 149                                 (void __iomem *)&regs->v_start);
 150         } else {
 151                 writel_relaxed(win->pitch[0], (void __iomem *)&regs->g_pitch);
 152
 153                 writel_relaxed((win->ysrc << 16) | win->xsrc,
 154                                 (void __iomem *)&regs->g_size);
 155                 writel_relaxed((win->ydst << 16) | win->xdst,
 156                                 (void __iomem *)&regs->g_size_z);
 157                 writel_relaxed(win->ypos << 16 | win->xpos,
 158                                 (void __iomem *)&regs->g_start);
 159         }
 160
 161         dmafetch_set_fmt(overlay);
 162         mutex_unlock(&overlay->access_ok);
 163 }
 164
 165 static void dmafetch_onoff(struct mmp_overlay *overlay, int on)
 166 {
 167         u32 mask = overlay_is_vid(overlay) ? CFG_DMA_ENA_MASK :
 168                    CFG_GRA_ENA_MASK;
 169         u32 enable = overlay_is_vid(overlay) ? CFG_DMA_ENA(1) : CFG_GRA_ENA(1);
 170         u32 tmp;
 171         struct mmp_path *path = overlay->path;
 172
 173         mutex_lock(&overlay->access_ok);
 174         tmp = readl_relaxed(ctrl_regs(path) + dma_ctrl(0, path->id));
 175         tmp &= ~mask;
 176         tmp |= (on ? enable : 0);
 177         writel(tmp, ctrl_regs(path) + dma_ctrl(0, path->id));
 178         mutex_unlock(&overlay->access_ok);
 179 }
 180
 181 static void path_enabledisable(struct mmp_path *path, int on)
 182 {
 183         u32 tmp;
 184         mutex_lock(&path->access_ok);
 185         tmp = readl_relaxed(ctrl_regs(path) + LCD_SCLK(path));
 186         if (on)
 187                 tmp &= ~SCLK_DISABLE;
 188         else
 189                 tmp |= SCLK_DISABLE;
 190         writel_relaxed(tmp, ctrl_regs(path) + LCD_SCLK(path));
 191         mutex_unlock(&path->access_ok);
 192 }
 193
 194 static void path_onoff(struct mmp_path *path, int on)
 195 {
 196         if (path->status == on) {
 197                 dev_info(path->dev, "path %s is already %s\n",
 198                                 path->name, stat_name(path->status));
 199                 return;
 200         }
 201
 202         if (on) {
 203                 path_enabledisable(path, 1);
 204
 205                 if (path->panel && path->panel->set_onoff)
 206                         path->panel->set_onoff(path->panel, 1);
 207         } else {
 208                 if (path->panel && path->panel->set_onoff)
 209                         path->panel->set_onoff(path->panel, 0);
 210
 211                 path_enabledisable(path, 0);
 212         }
 213         path->status = on;
 214 }
 215
 216 static void overlay_set_onoff(struct mmp_overlay *overlay, int on)
 217 {
 218         if (overlay->status == on) {
 219                 dev_info(overlay_to_ctrl(overlay)->dev, "overlay %s is already %s\n",
 220                         overlay->path->name, stat_name(overlay->status));
 221                 return;
 222         }
 223         overlay->status = on;
 224         dmafetch_onoff(overlay, on);
 225         if (overlay->path->ops.check_status(overlay->path)
 226                         != overlay->path->status)
 227                 path_onoff(overlay->path, on);
 228 }
 229
 230 static void overlay_set_fetch(struct mmp_overlay *overlay, int fetch_id)
 231 {
 232         overlay->dmafetch_id = fetch_id;
 233 }
 234
 235 static int overlay_set_addr(struct mmp_overlay *overlay, struct mmp_addr *addr)
 236 {
 237         struct lcd_regs *regs = path_regs(overlay->path);
 238
 239         /* FIXME: assert addr supported */
 240         memcpy(&overlay->addr, addr, sizeof(struct mmp_addr));
 241
 242         if (overlay_is_vid(overlay)) {
 243                 writel_relaxed(addr->phys[0], (void __iomem *)&regs->v_y0);
 244                 writel_relaxed(addr->phys[1], (void __iomem *)&regs->v_u0);
 245                 writel_relaxed(addr->phys[2], (void __iomem *)&regs->v_v0);
 246         } else
 247                 writel_relaxed(addr->phys[0], (void __iomem *)&regs->g_0);
 248
 249         return overlay->addr.phys[0];
 250 }
 251
 252 static void path_set_mode(struct mmp_path *path, struct mmp_mode *mode)
 253 {
 254         struct lcd_regs *regs = path_regs(path);
 255         u32 total_x, total_y, vsync_ctrl, tmp, sclk_src, sclk_div,
 256                 link_config = path_to_path_plat(path)->link_config,
 257                 dsi_rbswap = path_to_path_plat(path)->link_config;
 258
 259         /* FIXME: assert videomode supported */
 260         memcpy(&path->mode, mode, sizeof(struct mmp_mode));
 261
 262         mutex_lock(&path->access_ok);
 263
 264         /* polarity of timing signals */
 265         tmp = readl_relaxed(ctrl_regs(path) + intf_ctrl(path->id)) & 0x1;
 266         tmp |= mode->vsync_invert ? 0 : 0x8;
 267         tmp |= mode->hsync_invert ? 0 : 0x4;
 268         tmp |= link_config & CFG_DUMBMODE_MASK;
 269         tmp |= CFG_DUMB_ENA(1);
 270         writel_relaxed(tmp, ctrl_regs(path) + intf_ctrl(path->id));
 271
 272         /* interface rb_swap setting */
 273         tmp = readl_relaxed(ctrl_regs(path) + intf_rbswap_ctrl(path->id)) &
 274                 (~(CFG_INTFRBSWAP_MASK));
 275         tmp |= dsi_rbswap & CFG_INTFRBSWAP_MASK;
 276         writel_relaxed(tmp, ctrl_regs(path) + intf_rbswap_ctrl(path->id));
 277
 278         writel_relaxed((mode->yres << 16) | mode->xres,
 279                 (void __iomem *)&regs->screen_active);
 280         writel_relaxed((mode->left_margin << 16) | mode->right_margin,
 281                 (void __iomem *)&regs->screen_h_porch);
 282         writel_relaxed((mode->upper_margin << 16) | mode->lower_margin,
 283                 (void __iomem *)&regs->screen_v_porch);
 284         total_x = mode->xres + mode->left_margin + mode->right_margin +
 285                 mode->hsync_len;
 286         total_y = mode->yres + mode->upper_margin + mode->lower_margin +
 287                 mode->vsync_len;
 288         writel_relaxed((total_y << 16) | total_x,
 289                 (void __iomem *)&regs->screen_size);
 290
 291         /* vsync ctrl */
 292         if (path->output_type == PATH_OUT_DSI)
 293                 vsync_ctrl = 0x01330133;
 294         else
 295                 vsync_ctrl = ((mode->xres + mode->right_margin) << 16)
 296                                         | (mode->xres + mode->right_margin);
 297         writel_relaxed(vsync_ctrl, (void __iomem *)&regs->vsync_ctrl);
 298
 299         /* set pixclock div */
 300         sclk_src = clk_get_rate(path_to_ctrl(path)->clk);
 301         sclk_div = sclk_src / mode->pixclock_freq;
 302         if (sclk_div * mode->pixclock_freq < sclk_src)
 303                 sclk_div++;
 304
 305         dev_info(path->dev, "%s sclk_src %d sclk_div 0x%x pclk %d\n",
 306                         __func__, sclk_src, sclk_div, mode->pixclock_freq);
 307
 308         tmp = readl_relaxed(ctrl_regs(path) + LCD_SCLK(path));
 309         tmp &= ~CLK_INT_DIV_MASK;
 310         tmp |= sclk_div;
 311         writel_relaxed(tmp, ctrl_regs(path) + LCD_SCLK(path));
 312
 313         mutex_unlock(&path->access_ok);
 314 }
 315
 316 static struct mmp_overlay_ops mmphw_overlay_ops = {
 317         .set_fetch = overlay_set_fetch,
 318         .set_onoff = overlay_set_onoff,
 319         .set_win = overlay_set_win,
 320         .set_addr = overlay_set_addr,
 321 };
 322
 323 static void ctrl_set_default(struct mmphw_ctrl *ctrl)
 324 {
 325         u32 tmp, irq_mask;
 326
 327         /*
 328          * LCD Global control(LCD_TOP_CTRL) should be configed before
 329          * any other LCD registers read/write, or there maybe issues.
 330          */
 331         tmp = readl_relaxed(ctrl->reg_base + LCD_TOP_CTRL);
 332         tmp |= 0xfff0;
 333         writel_relaxed(tmp, ctrl->reg_base + LCD_TOP_CTRL);
 334
 335
 336         /* disable all interrupts */
 337         irq_mask = path_imasks(0) | err_imask(0) |
 338                    path_imasks(1) | err_imask(1);
 339         tmp = readl_relaxed(ctrl->reg_base + SPU_IRQ_ENA);
 340         tmp &= ~irq_mask;
 341         tmp |= irq_mask;
 342         writel_relaxed(tmp, ctrl->reg_base + SPU_IRQ_ENA);
 343 }
 344
 345 static void path_set_default(struct mmp_path *path)
 346 {
 347         struct lcd_regs *regs = path_regs(path);
 348         u32 dma_ctrl1, mask, tmp, path_config;
 349
 350         path_config = path_to_path_plat(path)->path_config;
 351
 352         /* Configure IOPAD: should be parallel only */
 353         if (PATH_OUT_PARALLEL == path->output_type) {
 354                 mask = CFG_IOPADMODE_MASK | CFG_BURST_MASK | CFG_BOUNDARY_MASK;
 355                 tmp = readl_relaxed(ctrl_regs(path) + SPU_IOPAD_CONTROL);
 356                 tmp &= ~mask;
 357                 tmp |= path_config;
 358                 writel_relaxed(tmp, ctrl_regs(path) + SPU_IOPAD_CONTROL);
 359         }
 360
 361         /* Select path clock source */
 362         tmp = readl_relaxed(ctrl_regs(path) + LCD_SCLK(path));
 363         tmp &= ~SCLK_SRC_SEL_MASK;
 364         tmp |= path_config;
 365         writel_relaxed(tmp, ctrl_regs(path) + LCD_SCLK(path));
 366
 367         /*
 368          * Configure default bits: vsync triggers DMA,
 369          * power save enable, configure alpha registers to
 370          * display 100% graphics, and set pixel command.
 371          */
 372         dma_ctrl1 = 0x2032ff81;
 373
 374         dma_ctrl1 |= CFG_VSYNC_INV_MASK;
 375         writel_relaxed(dma_ctrl1, ctrl_regs(path) + dma_ctrl(1, path->id));
 376
 377         /* Configure default register values */
 378         writel_relaxed(0x00000000, (void __iomem *)&regs->blank_color);
 379         writel_relaxed(0x00000000, (void __iomem *)&regs->g_1);
 380         writel_relaxed(0x00000000, (void __iomem *)&regs->g_start);
 381
 382         /*
 383          * 1.enable multiple burst request in DMA AXI
 384          * bus arbiter for faster read if not tv path;
 385          * 2.enable horizontal smooth filter;
 386          */
 387         mask = CFG_GRA_HSMOOTH_MASK | CFG_DMA_HSMOOTH_MASK | CFG_ARBFAST_ENA(1);
 388         tmp = readl_relaxed(ctrl_regs(path) + dma_ctrl(0, path->id));
 389         tmp |= mask;
 390         if (PATH_TV == path->id)
 391                 tmp &= ~CFG_ARBFAST_ENA(1);
 392         writel_relaxed(tmp, ctrl_regs(path) + dma_ctrl(0, path->id));
 393 }
 394
 395 static int path_init(struct mmphw_path_plat *path_plat,
 396                 struct mmp_mach_path_config *config)
 397 {
 398         struct mmphw_ctrl *ctrl = path_plat->ctrl;
 399         struct mmp_path_info *path_info;
 400         struct mmp_path *path = NULL;
 401
 402         dev_info(ctrl->dev, "%s: %s\n", __func__, config->name);
 403
 404         /* init driver data */
 405         path_info = kzalloc(sizeof(*path_info), GFP_KERNEL);
 406         if (!path_info)
 407                 return 0;
 408
 409         path_info->name = config->name;
 410         path_info->id = path_plat->id;
 411         path_info->dev = ctrl->dev;
 412         path_info->overlay_num = config->overlay_num;
 413         path_info->overlay_ops = &mmphw_overlay_ops;
 414         path_info->set_mode = path_set_mode;
 415         path_info->plat_data = path_plat;
 416
 417         /* create/register platform device */
 418         path = mmp_register_path(path_info);
 419         if (!path) {
 420                 kfree(path_info);
 421                 return 0;
 422         }
 423         path_plat->path = path;
 424         path_plat->path_config = config->path_config;
 425         path_plat->link_config = config->link_config;
 426         path_plat->dsi_rbswap = config->dsi_rbswap;
 427         path_set_default(path);
 428
 429         kfree(path_info);
 430         return 1;
 431 }
 432
 433 static void path_deinit(struct mmphw_path_plat *path_plat)
 434 {
 435         if (!path_plat)
 436                 return;
 437
 438         mmp_unregister_path(path_plat->path);
 439 }
 440
 441 static int mmphw_probe(struct platform_device *pdev)
 442 {
 443         struct mmp_mach_plat_info *mi;
 444         struct resource *res;
 445         int ret, i, irq;
 446         struct mmphw_path_plat *path_plat;
 447         struct mmphw_ctrl *ctrl = NULL;
 448
 449         /* get resources from platform data */
 450         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 451         if (res == NULL) {
 452                 dev_err(&pdev->dev, "%s: no IO memory defined\n", __func__);
 453                 ret = -ENOENT;
 454                 goto failed;
 455         }
 456
 457         irq = platform_get_irq(pdev, 0);
 458         if (irq < 0) {
 459                 ret = -ENOENT;
 460                 goto failed;
 461         }
 462
 463         /* get configs from platform data */
 464         mi = pdev->dev.platform_data;
 465         if (mi == NULL || !mi->path_num || !mi->paths) {
 466                 dev_err(&pdev->dev, "%s: no platform data defined\n", __func__);
 467                 ret = -EINVAL;
 468                 goto failed;
 469         }
 470
 471         /* allocate */
 472         ctrl = devm_kzalloc(&pdev->dev,
 473                             struct_size(ctrl, path_plats, mi->path_num),
 474                             GFP_KERNEL);
 475         if (!ctrl) {
 476                 ret = -ENOMEM;
 477                 goto failed;
 478         }
 479
 480         ctrl->name = mi->name;
 481         ctrl->path_num = mi->path_num;
 482         ctrl->dev = &pdev->dev;
 483         ctrl->irq = irq;
 484         platform_set_drvdata(pdev, ctrl);
 485         mutex_init(&ctrl->access_ok);
 486
 487         /* map registers.*/
 488         if (!devm_request_mem_region(ctrl->dev, res->start,
 489                         resource_size(res), ctrl->name)) {
 490                 dev_err(ctrl->dev,
 491                         "can't request region for resource %pR\n", res);
 492                 ret = -EINVAL;
 493                 goto failed;
 494         }
 495
 496         ctrl->reg_base = devm_ioremap(ctrl->dev,
 497                         res->start, resource_size(res));
 498         if (ctrl->reg_base == NULL) {
 499                 dev_err(ctrl->dev, "%s: res %pR map failed\n", __func__, res);
 500                 ret = -ENOMEM;
 501                 goto failed;
 502         }
 503
 504         /* request irq */
 505         ret = devm_request_irq(ctrl->dev, ctrl->irq, ctrl_handle_irq,
 506                 IRQF_SHARED, "lcd_controller", ctrl);
 507         if (ret < 0) {
 508                 dev_err(ctrl->dev, "%s unable to request IRQ %d\n",
 509                                 __func__, ctrl->irq);
 510                 ret = -ENXIO;
 511                 goto failed;
 512         }
 513
 514         /* get clock */
 515         ctrl->clk = devm_clk_get(ctrl->dev, mi->clk_name);
 516         if (IS_ERR(ctrl->clk)) {
 517                 dev_err(ctrl->dev, "unable to get clk %s\n", mi->clk_name);
 518                 ret = -ENOENT;
 519                 goto failed;
 520         }
 521         clk_prepare_enable(ctrl->clk);
 522
 523         /* init global regs */
 524         ctrl_set_default(ctrl);
 525
 526         /* init pathes from machine info and register them */
 527         for (i = 0; i < ctrl->path_num; i++) {
 528                 /* get from config and machine info */
 529                 path_plat = &ctrl->path_plats[i];
 530                 path_plat->id = i;
 531                 path_plat->ctrl = ctrl;
 532
 533                 /* path init */
 534                 if (!path_init(path_plat, &mi->paths[i])) {
 535                         ret = -EINVAL;
 536                         goto failed_path_init;
 537                 }
 538         }
 539
 540 #ifdef CONFIG_MMP_DISP_SPI
 541         ret = lcd_spi_register(ctrl);
 542         if (ret < 0)
 543                 goto failed_path_init;
 544 #endif
 545
 546         dev_info(ctrl->dev, "device init done\n");
 547
 548         return 0;
 549
 550 failed_path_init:
 551         for (i = 0; i < ctrl->path_num; i++) {
 552                 path_plat = &ctrl->path_plats[i];
 553                 path_deinit(path_plat);
 554         }
 555
 556         clk_disable_unprepare(ctrl->clk);
 557 failed:
 558         dev_err(&pdev->dev, "device init failed\n");
 559
 560         return ret;
 561 }
 562
 563 static struct platform_driver mmphw_driver = {
 564         .driver         = {
 565                 .name   = "mmp-disp",
 566         },
 567         .probe          = mmphw_probe,
 568 };
 569
 570 static int mmphw_init(void)
 571 {
 572         return platform_driver_register(&mmphw_driver);
 573 }
 574 module_init(mmphw_init);
 575
 576 MODULE_AUTHOR("Li Guoqing<ligq@marvell.com>");
 577 MODULE_DESCRIPTION("Framebuffer driver for mmp");
 578 MODULE_LICENSE("GPL");