LXR linux/drivers/video/msm/mdp.c

   1/* drivers/video/msm_fb/mdp.c
   2 *
   3 * MSM MDP Interface (used by framebuffer core)
   4 *
   5 * Copyright (C) 2007 QUALCOMM Incorporated
   6 * Copyright (C) 2007 Google Incorporated
   7 *
   8 * This software is licensed under the terms of the GNU General Public
   9 * License version 2, as published by the Free Software Foundation, and
  10 * may be copied, distributed, and modified under those terms.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 */
  17
  18#include <linux/kernel.h>
  19#include <linux/fb.h>
  20#include <linux/msm_mdp.h>
  21#include <linux/interrupt.h>
  22#include <linux/wait.h>
  23#include <linux/clk.h>
  24#include <linux/file.h>
  25#include <linux/major.h>
  26
  27#include <mach/msm_iomap.h>
  28#include <mach/msm_fb.h>
  29#include <linux/platform_device.h>
  30
  31#include "mdp_hw.h"
  32
  33struct class *mdp_class;
  34
  35#define MDP_CMD_DEBUG_ACCESS_BASE (0x10000)
  36
  37static uint16_t mdp_default_ccs[] = {
  38        0x254, 0x000, 0x331, 0x254, 0xF38, 0xE61, 0x254, 0x409, 0x000,
  39        0x010, 0x080, 0x080
  40};
  41
  42static DECLARE_WAIT_QUEUE_HEAD(mdp_dma2_waitqueue);
  43static DECLARE_WAIT_QUEUE_HEAD(mdp_ppp_waitqueue);
  44static struct msmfb_callback *dma_callback;
  45static struct clk *clk;
  46static unsigned int mdp_irq_mask;
  47static DEFINE_SPINLOCK(mdp_lock);
  48DEFINE_MUTEX(mdp_mutex);
  49
  50static int enable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
  51{
  52        unsigned long irq_flags;
  53        int ret = 0;
  54
  55        BUG_ON(!mask);
  56
  57        spin_lock_irqsave(&mdp_lock, irq_flags);
  58        /* if the mask bits are already set return an error, this interrupt
  59         * is already enabled */
  60        if (mdp_irq_mask & mask) {
  61                printk(KERN_ERR "mdp irq already on already on %x %x\n",
  62                       mdp_irq_mask, mask);
  63                ret = -1;
  64        }
  65        /* if the mdp irq is not already enabled enable it */
  66        if (!mdp_irq_mask) {
  67                if (clk)
  68                        clk_enable(clk);
  69                enable_irq(mdp->irq);
  70        }
  71
  72        /* update the irq mask to reflect the fact that the interrupt is
  73         * enabled */
  74        mdp_irq_mask |= mask;
  75        spin_unlock_irqrestore(&mdp_lock, irq_flags);
  76        return ret;
  77}
  78
  79static int locked_disable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
  80{
  81        /* this interrupt is already disabled! */
  82        if (!(mdp_irq_mask & mask)) {
  83                printk(KERN_ERR "mdp irq already off %x %x\n",
  84                       mdp_irq_mask, mask);
  85                return -1;
  86        }
  87        /* update the irq mask to reflect the fact that the interrupt is
  88         * disabled */
  89        mdp_irq_mask &= ~(mask);
  90        /* if no one is waiting on the interrupt, disable it */
  91        if (!mdp_irq_mask) {
  92                disable_irq(mdp->irq);
  93                if (clk)
  94                        clk_disable(clk);
  95        }
  96        return 0;
  97}
  98
  99static int disable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
 100{
 101        unsigned long irq_flags;
 102        int ret;
 103
 104        spin_lock_irqsave(&mdp_lock, irq_flags);
 105        ret = locked_disable_mdp_irq(mdp, mask);
 106        spin_unlock_irqrestore(&mdp_lock, irq_flags);
 107        return ret;
 108}
 109
 110static irqreturn_t mdp_isr(int irq, void *data)
 111{
 112        uint32_t status;
 113        unsigned long irq_flags;
 114        struct mdp_info *mdp = data;
 115
 116        spin_lock_irqsave(&mdp_lock, irq_flags);
 117
 118        status = mdp_readl(mdp, MDP_INTR_STATUS);
 119        mdp_writel(mdp, status, MDP_INTR_CLEAR);
 120
 121        status &= mdp_irq_mask;
 122        if (status & DL0_DMA2_TERM_DONE) {
 123                if (dma_callback) {
 124                        dma_callback->func(dma_callback);
 125                        dma_callback = NULL;
 126                }
 127                wake_up(&mdp_dma2_waitqueue);
 128        }
 129
 130        if (status & DL0_ROI_DONE)
 131                wake_up(&mdp_ppp_waitqueue);
 132
 133        if (status)
 134                locked_disable_mdp_irq(mdp, status);
 135
 136        spin_unlock_irqrestore(&mdp_lock, irq_flags);
 137        return IRQ_HANDLED;
 138}
 139
 140static uint32_t mdp_check_mask(uint32_t mask)
 141{
 142        uint32_t ret;
 143        unsigned long irq_flags;
 144
 145        spin_lock_irqsave(&mdp_lock, irq_flags);
 146        ret = mdp_irq_mask & mask;
 147        spin_unlock_irqrestore(&mdp_lock, irq_flags);
 148        return ret;
 149}
 150
 151static int mdp_wait(struct mdp_info *mdp, uint32_t mask, wait_queue_head_t *wq)
 152{
 153        int ret = 0;
 154        unsigned long irq_flags;
 155
 156        wait_event_timeout(*wq, !mdp_check_mask(mask), HZ);
 157
 158        spin_lock_irqsave(&mdp_lock, irq_flags);
 159        if (mdp_irq_mask & mask) {
 160                locked_disable_mdp_irq(mdp, mask);
 161                printk(KERN_WARNING "timeout waiting for mdp to complete %x\n",
 162                       mask);
 163                ret = -ETIMEDOUT;
 164        }
 165        spin_unlock_irqrestore(&mdp_lock, irq_flags);
 166
 167        return ret;
 168}
 169
 170void mdp_dma_wait(struct mdp_device *mdp_dev)
 171{
 172#define MDP_MAX_TIMEOUTS 20
 173        static int timeout_count;
 174        struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
 175
 176        if (mdp_wait(mdp, DL0_DMA2_TERM_DONE, &mdp_dma2_waitqueue) == -ETIMEDOUT)
 177                timeout_count++;
 178        else
 179                timeout_count = 0;
 180
 181        if (timeout_count > MDP_MAX_TIMEOUTS) {
 182                printk(KERN_ERR "mdp: dma failed %d times, somethings wrong!\n",
 183                       MDP_MAX_TIMEOUTS);
 184                BUG();
 185        }
 186}
 187
 188static int mdp_ppp_wait(struct mdp_info *mdp)
 189{
 190        return mdp_wait(mdp, DL0_ROI_DONE, &mdp_ppp_waitqueue);
 191}
 192
 193void mdp_dma_to_mddi(struct mdp_info *mdp, uint32_t addr, uint32_t stride,
 194                     uint32_t width, uint32_t height, uint32_t x, uint32_t y,
 195                     struct msmfb_callback *callback)
 196{
 197        uint32_t dma2_cfg;
 198        uint16_t ld_param = 0; /* 0=PRIM, 1=SECD, 2=EXT */
 199
 200        if (enable_mdp_irq(mdp, DL0_DMA2_TERM_DONE)) {
 201                printk(KERN_ERR "mdp_dma_to_mddi: busy\n");
 202                return;
 203        }
 204
 205        dma_callback = callback;
 206
 207        dma2_cfg = DMA_PACK_TIGHT |
 208                DMA_PACK_ALIGN_LSB |
 209                DMA_PACK_PATTERN_RGB |
 210                DMA_OUT_SEL_AHB |
 211                DMA_IBUF_NONCONTIGUOUS;
 212
 213        dma2_cfg |= DMA_IBUF_FORMAT_RGB565;
 214
 215        dma2_cfg |= DMA_OUT_SEL_MDDI;
 216
 217        dma2_cfg |= DMA_MDDI_DMAOUT_LCD_SEL_PRIMARY;
 218
 219        dma2_cfg |= DMA_DITHER_EN;
 220
 221        /* setup size, address, and stride */
 222        mdp_writel(mdp, (height << 16) | (width),
 223                   MDP_CMD_DEBUG_ACCESS_BASE + 0x0184);
 224        mdp_writel(mdp, addr, MDP_CMD_DEBUG_ACCESS_BASE + 0x0188);
 225        mdp_writel(mdp, stride, MDP_CMD_DEBUG_ACCESS_BASE + 0x018C);
 226
 227        /* 666 18BPP */
 228        dma2_cfg |= DMA_DSTC0G_6BITS | DMA_DSTC1B_6BITS | DMA_DSTC2R_6BITS;
 229
 230        /* set y & x offset and MDDI transaction parameters */
 231        mdp_writel(mdp, (y << 16) | (x), MDP_CMD_DEBUG_ACCESS_BASE + 0x0194);
 232        mdp_writel(mdp, ld_param, MDP_CMD_DEBUG_ACCESS_BASE + 0x01a0);
 233        mdp_writel(mdp, (MDDI_VDO_PACKET_DESC << 16) | MDDI_VDO_PACKET_PRIM,
 234                   MDP_CMD_DEBUG_ACCESS_BASE + 0x01a4);
 235
 236        mdp_writel(mdp, dma2_cfg, MDP_CMD_DEBUG_ACCESS_BASE + 0x0180);
 237
 238        /* start DMA2 */
 239        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0044);
 240}
 241
 242void mdp_dma(struct mdp_device *mdp_dev, uint32_t addr, uint32_t stride,
 243             uint32_t width, uint32_t height, uint32_t x, uint32_t y,
 244             struct msmfb_callback *callback, int interface)
 245{
 246        struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
 247
 248        if (interface == MSM_MDDI_PMDH_INTERFACE) {
 249                mdp_dma_to_mddi(mdp, addr, stride, width, height, x, y,
 250                                callback);
 251        }
 252}
 253
 254int get_img(struct mdp_img *img, struct fb_info *info,
 255            unsigned long *start, unsigned long *len,
 256            struct file **filep)
 257{
 258        int put_needed, ret = 0;
 259        struct file *file;
 260        unsigned long vstart;
 261
 262        file = fget_light(img->memory_id, &put_needed);
 263        if (file == NULL)
 264                return -1;
 265
 266        if (MAJOR(file->f_dentry->d_inode->i_rdev) == FB_MAJOR) {
 267                *start = info->fix.smem_start;
 268                *len = info->fix.smem_len;
 269        } else
 270                ret = -1;
 271        fput_light(file, put_needed);
 272
 273        return ret;
 274}
 275
 276void put_img(struct file *src_file, struct file *dst_file)
 277{
 278}
 279
 280int mdp_blit(struct mdp_device *mdp_dev, struct fb_info *fb,
 281             struct mdp_blit_req *req)
 282{
 283        int ret;
 284        unsigned long src_start = 0, src_len = 0, dst_start = 0, dst_len = 0;
 285        struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
 286        struct file *src_file = 0, *dst_file = 0;
 287
 288        /* WORKAROUND FOR HARDWARE BUG IN BG TILE FETCH */
 289        if (unlikely(req->src_rect.h == 0 ||
 290                     req->src_rect.w == 0)) {
 291                printk(KERN_ERR "mpd_ppp: src img of zero size!\n");
 292                return -EINVAL;
 293        }
 294        if (unlikely(req->dst_rect.h == 0 ||
 295                     req->dst_rect.w == 0))
 296                return -EINVAL;
 297
 298        /* do this first so that if this fails, the caller can always
 299         * safely call put_img */
 300        if (unlikely(get_img(&req->src, fb, &src_start, &src_len, &src_file))) {
 301                printk(KERN_ERR "mpd_ppp: could not retrieve src image from "
 302                                "memory\n");
 303                return -EINVAL;
 304        }
 305
 306        if (unlikely(get_img(&req->dst, fb, &dst_start, &dst_len, &dst_file))) {
 307                printk(KERN_ERR "mpd_ppp: could not retrieve dst image from "
 308                                "memory\n");
 309                return -EINVAL;
 310        }
 311        mutex_lock(&mdp_mutex);
 312
 313        /* transp_masking unimplemented */
 314        req->transp_mask = MDP_TRANSP_NOP;
 315        if (unlikely((req->transp_mask != MDP_TRANSP_NOP ||
 316                      req->alpha != MDP_ALPHA_NOP ||
 317                      HAS_ALPHA(req->src.format)) &&
 318                     (req->flags & MDP_ROT_90 &&
 319                      req->dst_rect.w <= 16 && req->dst_rect.h >= 16))) {
 320                int i;
 321                unsigned int tiles = req->dst_rect.h / 16;
 322                unsigned int remainder = req->dst_rect.h % 16;
 323                req->src_rect.w = 16*req->src_rect.w / req->dst_rect.h;
 324                req->dst_rect.h = 16;
 325                for (i = 0; i < tiles; i++) {
 326                        enable_mdp_irq(mdp, DL0_ROI_DONE);
 327                        ret = mdp_ppp_blit(mdp, req, src_file, src_start,
 328                                           src_len, dst_file, dst_start,
 329                                           dst_len);
 330                        if (ret)
 331                                goto err_bad_blit;
 332                        ret = mdp_ppp_wait(mdp);
 333                        if (ret)
 334                                goto err_wait_failed;
 335                        req->dst_rect.y += 16;
 336                        req->src_rect.x += req->src_rect.w;
 337                }
 338                if (!remainder)
 339                        goto end;
 340                req->src_rect.w = remainder*req->src_rect.w / req->dst_rect.h;
 341                req->dst_rect.h = remainder;
 342        }
 343        enable_mdp_irq(mdp, DL0_ROI_DONE);
 344        ret = mdp_ppp_blit(mdp, req, src_file, src_start, src_len, dst_file,
 345                           dst_start,
 346                           dst_len);
 347        if (ret)
 348                goto err_bad_blit;
 349        ret = mdp_ppp_wait(mdp);
 350        if (ret)
 351                goto err_wait_failed;
 352end:
 353        put_img(src_file, dst_file);
 354        mutex_unlock(&mdp_mutex);
 355        return 0;
 356err_bad_blit:
 357        disable_mdp_irq(mdp, DL0_ROI_DONE);
 358err_wait_failed:
 359        put_img(src_file, dst_file);
 360        mutex_unlock(&mdp_mutex);
 361        return ret;
 362}
 363
 364void mdp_set_grp_disp(struct mdp_device *mdp_dev, unsigned disp_id)
 365{
 366        struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
 367
 368        disp_id &= 0xf;
 369        mdp_writel(mdp, disp_id, MDP_FULL_BYPASS_WORD43);
 370}
 371
 372int register_mdp_client(struct class_interface *cint)
 373{
 374        if (!mdp_class) {
 375                pr_err("mdp: no mdp_class when registering mdp client\n");
 376                return -ENODEV;
 377        }
 378        cint->class = mdp_class;
 379        return class_interface_register(cint);
 380}
 381
 382#include "mdp_csc_table.h"
 383#include "mdp_scale_tables.h"
 384
 385int mdp_probe(struct platform_device *pdev)
 386{
 387        struct resource *resource;
 388        int ret;
 389        int n;
 390        struct mdp_info *mdp;
 391
 392        resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 393        if (!resource) {
 394                pr_err("mdp: can not get mdp mem resource!\n");
 395                return -ENOMEM;
 396        }
 397
 398        mdp = kzalloc(sizeof(struct mdp_info), GFP_KERNEL);
 399        if (!mdp)
 400                return -ENOMEM;
 401
 402        mdp->irq = platform_get_irq(pdev, 0);
 403        if (mdp->irq < 0) {
 404                pr_err("mdp: can not get mdp irq\n");
 405                ret = mdp->irq;
 406                goto error_get_irq;
 407        }
 408
 409        mdp->base = ioremap(resource->start,
 410                            resource->end - resource->start);
 411        if (mdp->base == 0) {
 412                printk(KERN_ERR "msmfb: cannot allocate mdp regs!\n");
 413                ret = -ENOMEM;
 414                goto error_ioremap;
 415        }
 416
 417        mdp->mdp_dev.dma = mdp_dma;
 418        mdp->mdp_dev.dma_wait = mdp_dma_wait;
 419        mdp->mdp_dev.blit = mdp_blit;
 420        mdp->mdp_dev.set_grp_disp = mdp_set_grp_disp;
 421
 422        clk = clk_get(&pdev->dev, "mdp_clk");
 423        if (IS_ERR(clk)) {
 424                printk(KERN_INFO "mdp: failed to get mdp clk");
 425                return PTR_ERR(clk);
 426        }
 427
 428        ret = request_irq(mdp->irq, mdp_isr, IRQF_DISABLED, "msm_mdp", mdp);
 429        if (ret)
 430                goto error_request_irq;
 431        disable_irq(mdp->irq);
 432        mdp_irq_mask = 0;
 433
 434        /* debug interface write access */
 435        mdp_writel(mdp, 1, 0x60);
 436
 437        mdp_writel(mdp, MDP_ANY_INTR_MASK, MDP_INTR_ENABLE);
 438        mdp_writel(mdp, 1, MDP_EBI2_PORTMAP_MODE);
 439
 440        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01f8);
 441        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01fc);
 442
 443        for (n = 0; n < ARRAY_SIZE(csc_table); n++)
 444                mdp_writel(mdp, csc_table[n].val, csc_table[n].reg);
 445
 446        /* clear up unused fg/main registers */
 447        /* comp.plane 2&3 ystride */
 448        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0120);
 449
 450        /* unpacked pattern */
 451        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x012c);
 452        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0130);
 453        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0134);
 454        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0158);
 455        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x015c);
 456        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0160);
 457        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0170);
 458        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0174);
 459        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x017c);
 460
 461        /* comp.plane 2 & 3 */
 462        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0114);
 463        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0118);
 464
 465        /* clear unused bg registers */
 466        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01c8);
 467        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01d0);
 468        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01dc);
 469        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01e0);
 470        mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01e4);
 471
 472        for (n = 0; n < ARRAY_SIZE(mdp_upscale_table); n++)
 473                mdp_writel(mdp, mdp_upscale_table[n].val,
 474                       mdp_upscale_table[n].reg);
 475
 476        for (n = 0; n < 9; n++)
 477                mdp_writel(mdp, mdp_default_ccs[n], 0x40440 + 4 * n);
 478        mdp_writel(mdp, mdp_default_ccs[9], 0x40500 + 4 * 0);
 479        mdp_writel(mdp, mdp_default_ccs[10], 0x40500 + 4 * 0);
 480        mdp_writel(mdp, mdp_default_ccs[11], 0x40500 + 4 * 0);
 481
 482        /* register mdp device */
 483        mdp->mdp_dev.dev.parent = &pdev->dev;
 484        mdp->mdp_dev.dev.class = mdp_class;
 485
 486        /* if you can remove the platform device you'd have to implement
 487         * this:
 488        mdp_dev.release = mdp_class; */
 489
 490        ret = device_register(&mdp->mdp_dev.dev);
 491        if (ret)
 492                goto error_device_register;
 493        return 0;
 494
 495error_device_register:
 496        free_irq(mdp->irq, mdp);
 497error_request_irq:
 498        iounmap(mdp->base);
 499error_get_irq:
 500error_ioremap:
 501        kfree(mdp);
 502        return ret;
 503}
 504
 505static struct platform_driver msm_mdp_driver = {
 506        .probe = mdp_probe,
 507        .driver = {.name = "msm_mdp"},
 508};
 509
 510static int __init mdp_init(void)
 511{
 512        mdp_class = class_create(THIS_MODULE, "msm_mdp");
 513        if (IS_ERR(mdp_class)) {
 514                printk(KERN_ERR "Error creating mdp class\n");
 515                return PTR_ERR(mdp_class);
 516        }
 517        return platform_driver_register(&msm_mdp_driver);
 518}
 519
 520subsys_initcall(mdp_init);
 521