drivers/staging/msm/tvenc.c

   1 /* Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License version 2 and
   5  * only version 2 as published by the Free Software Foundation.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program; if not, write to the Free Software
  14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  15  * 02110-1301, USA.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/sched.h>
  21 #include <linux/time.h>
  22 #include <linux/init.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/delay.h>
  26 #include <mach/hardware.h>
  27 #include <linux/io.h>
  28
  29 #include <asm/system.h>
  30 #include <asm/mach-types.h>
  31 #include <linux/semaphore.h>
  32 #include <linux/uaccess.h>
  33 #include <linux/clk.h>
  34 #include <linux/platform_device.h>
  35 #include <linux/pm_qos_params.h>
  36
  37 #define TVENC_C
  38 #include "tvenc.h"
  39 #include "msm_fb.h"
  40
  41 static int tvenc_probe(struct platform_device *pdev);
  42 static int tvenc_remove(struct platform_device *pdev);
  43
  44 static int tvenc_off(struct platform_device *pdev);
  45 static int tvenc_on(struct platform_device *pdev);
  46
  47 static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
  48 static int pdev_list_cnt;
  49
  50 static struct clk *tvenc_clk;
  51 static struct clk *tvdac_clk;
  52
  53 static struct platform_driver tvenc_driver = {
  54         .probe = tvenc_probe,
  55         .remove = tvenc_remove,
  56         .suspend = NULL,
  57 //      .suspend_late = NULL,
  58 //      .resume_early = NULL,
  59         .resume = NULL,
  60         .shutdown = NULL,
  61         .driver = {
  62                    .name = "tvenc",
  63                    },
  64 };
  65
  66 static struct tvenc_platform_data *tvenc_pdata;
  67
  68 static int tvenc_off(struct platform_device *pdev)
  69 {
  70         int ret = 0;
  71
  72         ret = panel_next_off(pdev);
  73
  74         clk_disable(tvenc_clk);
  75         clk_disable(tvdac_clk);
  76
  77         if (tvenc_pdata && tvenc_pdata->pm_vid_en)
  78                 ret = tvenc_pdata->pm_vid_en(0);
  79
  80         //pm_qos_update_requirement(PM_QOS_SYSTEM_BUS_FREQ , "tvenc",
  81         //                              PM_QOS_DEFAULT_VALUE);
  82
  83         if (ret)
  84                 printk(KERN_ERR "%s: pm_vid_en(off) failed! %d\n",
  85                 __func__, ret);
  86
  87         return ret;
  88 }
  89
  90 static int tvenc_on(struct platform_device *pdev)
  91 {
  92         int ret = 0;
  93
  94 //      pm_qos_update_requirement(PM_QOS_SYSTEM_BUS_FREQ , "tvenc",
  95 //                              128000);
  96         if (tvenc_pdata && tvenc_pdata->pm_vid_en)
  97                 ret = tvenc_pdata->pm_vid_en(1);
  98
  99         if (ret) {
 100                 printk(KERN_ERR "%s: pm_vid_en(on) failed! %d\n",
 101                 __func__, ret);
 102                 return ret;
 103         }
 104
 105         clk_enable(tvenc_clk);
 106         clk_enable(tvdac_clk);
 107
 108         ret = panel_next_on(pdev);
 109
 110         return ret;
 111 }
 112
 113 void tvenc_gen_test_pattern(struct msm_fb_data_type *mfd)
 114 {
 115         uint32 reg = 0, i;
 116
 117         reg = readl(MSM_TV_ENC_CTL);
 118         reg |= TVENC_CTL_TEST_PATT_EN;
 119
 120         for (i = 0; i < 3; i++) {
 121                 TV_OUT(TV_ENC_CTL, 0);  /* disable TV encoder */
 122
 123                 switch (i) {
 124                         /*
 125                          * TV Encoder - Color Bar Test Pattern
 126                          */
 127                 case 0:
 128                         reg |= TVENC_CTL_TPG_CLRBAR;
 129                         break;
 130                         /*
 131                          * TV Encoder - Red Frame Test Pattern
 132                          */
 133                 case 1:
 134                         reg |= TVENC_CTL_TPG_REDCLR;
 135                         break;
 136                         /*
 137                          * TV Encoder - Modulated Ramp Test Pattern
 138                          */
 139                 default:
 140                         reg |= TVENC_CTL_TPG_MODRAMP;
 141                         break;
 142                 }
 143
 144                 TV_OUT(TV_ENC_CTL, reg);
 145                 mdelay(5000);
 146
 147                 switch (i) {
 148                         /*
 149                          * TV Encoder - Color Bar Test Pattern
 150                          */
 151                 case 0:
 152                         reg &= ~TVENC_CTL_TPG_CLRBAR;
 153                         break;
 154                         /*
 155                          * TV Encoder - Red Frame Test Pattern
 156                          */
 157                 case 1:
 158                         reg &= ~TVENC_CTL_TPG_REDCLR;
 159                         break;
 160                         /*
 161                          * TV Encoder - Modulated Ramp Test Pattern
 162                          */
 163                 default:
 164                         reg &= ~TVENC_CTL_TPG_MODRAMP;
 165                         break;
 166                 }
 167         }
 168 }
 169
 170 static int tvenc_resource_initialized;
 171
 172 static int tvenc_probe(struct platform_device *pdev)
 173 {
 174         struct msm_fb_data_type *mfd;
 175         struct platform_device *mdp_dev = NULL;
 176         struct msm_fb_panel_data *pdata = NULL;
 177         int rc;
 178
 179         if (pdev->id == 0) {
 180                 tvenc_base = ioremap(pdev->resource[0].start,
 181                                         pdev->resource[0].end -
 182                                         pdev->resource[0].start + 1);
 183                 if (!tvenc_base) {
 184                         printk(KERN_ERR
 185                                 "tvenc_base ioremap failed!\n");
 186                         return -ENOMEM;
 187                 }
 188                 tvenc_pdata = pdev->dev.platform_data;
 189                 tvenc_resource_initialized = 1;
 190                 return 0;
 191         }
 192
 193         if (!tvenc_resource_initialized)
 194                 return -EPERM;
 195
 196         mfd = platform_get_drvdata(pdev);
 197
 198         if (!mfd)
 199                 return -ENODEV;
 200
 201         if (mfd->key != MFD_KEY)
 202                 return -EINVAL;
 203
 204         if (pdev_list_cnt >= MSM_FB_MAX_DEV_LIST)
 205                 return -ENOMEM;
 206
 207         if (tvenc_base == NULL)
 208                 return -ENOMEM;
 209
 210         mdp_dev = platform_device_alloc("mdp", pdev->id);
 211         if (!mdp_dev)
 212                 return -ENOMEM;
 213
 214         /*
 215          * link to the latest pdev
 216          */
 217         mfd->pdev = mdp_dev;
 218         mfd->dest = DISPLAY_TV;
 219
 220         /*
 221          * alloc panel device data
 222          */
 223         if (platform_device_add_data
 224             (mdp_dev, pdev->dev.platform_data,
 225              sizeof(struct msm_fb_panel_data))) {
 226                 printk(KERN_ERR "tvenc_probe: platform_device_add_data failed!\n");
 227                 platform_device_put(mdp_dev);
 228                 return -ENOMEM;
 229         }
 230         /*
 231          * data chain
 232          */
 233         pdata = mdp_dev->dev.platform_data;
 234         pdata->on = tvenc_on;
 235         pdata->off = tvenc_off;
 236         pdata->next = pdev;
 237
 238         /*
 239          * get/set panel specific fb info
 240          */
 241         mfd->panel_info = pdata->panel_info;
 242         mfd->fb_imgType = MDP_YCRYCB_H2V1;
 243
 244         /*
 245          * set driver data
 246          */
 247         platform_set_drvdata(mdp_dev, mfd);
 248
 249         /*
 250          * register in mdp driver
 251          */
 252         rc = platform_device_add(mdp_dev);
 253         if (rc)
 254                 goto tvenc_probe_err;
 255
 256         pdev_list[pdev_list_cnt++] = pdev;
 257         return 0;
 258
 259 tvenc_probe_err:
 260         platform_device_put(mdp_dev);
 261         return rc;
 262 }
 263
 264 static int tvenc_remove(struct platform_device *pdev)
 265 {
 266 //      pm_qos_remove_requirement(PM_QOS_SYSTEM_BUS_FREQ , "tvenc");
 267         return 0;
 268 }
 269
 270 static int tvenc_register_driver(void)
 271 {
 272         return platform_driver_register(&tvenc_driver);
 273 }
 274
 275 static int __init tvenc_driver_init(void)
 276 {
 277         tvenc_clk = clk_get(NULL, "tv_enc_clk");
 278         tvdac_clk = clk_get(NULL, "tv_dac_clk");
 279
 280         if (IS_ERR(tvenc_clk)) {
 281                 printk(KERN_ERR "error: can't get tvenc_clk!\n");
 282                 return PTR_ERR(tvenc_clk);
 283         }
 284
 285         if (IS_ERR(tvdac_clk)) {
 286                 printk(KERN_ERR "error: can't get tvdac_clk!\n");
 287                 clk_put(tvenc_clk);
 288                 return PTR_ERR(tvdac_clk);
 289         }
 290
 291 //      pm_qos_add_requirement(PM_QOS_SYSTEM_BUS_FREQ , "tvenc",
 292 //                              PM_QOS_DEFAULT_VALUE);
 293         return tvenc_register_driver();
 294 }
 295
 296 module_init(tvenc_driver_init);