drivers/staging/msm/ebi2_lcd.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/moduleparam.h>
  20 #include <linux/kernel.h>
  21 #include <linux/slab.h>
  22 #include <linux/delay.h>
  23 #include <linux/mm.h>
  24 #include <linux/fb.h>
  25 #include <linux/init.h>
  26 #include <linux/ioport.h>
  27 #include <linux/device.h>
  28 #include <linux/dma-mapping.h>
  29 #include <linux/uaccess.h>
  30 #include <linux/workqueue.h>
  31 #include <linux/string.h>
  32 #include <linux/version.h>
  33 #include <linux/proc_fs.h>
  34 #include <linux/vmalloc.h>
  35 #include <linux/debugfs.h>
  36
  37 #include "msm_fb.h"
  38
  39 static int ebi2_lcd_probe(struct platform_device *pdev);
  40 static int ebi2_lcd_remove(struct platform_device *pdev);
  41
  42 static struct platform_driver ebi2_lcd_driver = {
  43         .probe = ebi2_lcd_probe,
  44         .remove = ebi2_lcd_remove,
  45         .suspend = NULL,
  46         .suspend_late = NULL,
  47         .resume_early = NULL,
  48         .resume = NULL,
  49         .shutdown = NULL,
  50         .driver = {
  51                    .name = "ebi2_lcd",
  52                    },
  53 };
  54
  55 static void *ebi2_base;
  56 static void *ebi2_lcd_cfg0;
  57 static void *ebi2_lcd_cfg1;
  58 static void __iomem *lcd01_base;
  59 static void __iomem *lcd02_base;
  60 static int ebi2_lcd_resource_initialized;
  61
  62 static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
  63 static int pdev_list_cnt;
  64
  65 static int ebi2_lcd_probe(struct platform_device *pdev)
  66 {
  67         struct msm_fb_data_type *mfd;
  68         struct platform_device *mdp_dev = NULL;
  69         struct msm_fb_panel_data *pdata = NULL;
  70         int rc, i;
  71
  72         if (pdev->id == 0) {
  73                 for (i = 0; i < pdev->num_resources; i++) {
  74                         if (!strncmp(pdev->resource[i].name, "base", 4)) {
  75                                 ebi2_base = ioremap(pdev->resource[i].start,
  76                                                 pdev->resource[i].end -
  77                                                 pdev->resource[i].start + 1);
  78                                 if (!ebi2_base) {
  79                                         printk(KERN_ERR
  80                                                 "ebi2_base ioremap failed!\n");
  81                                         return -ENOMEM;
  82                                 }
  83                                 ebi2_lcd_cfg0 = (void *)(ebi2_base + 0x20);
  84                                 ebi2_lcd_cfg1 = (void *)(ebi2_base + 0x24);
  85                         } else if (!strncmp(pdev->resource[i].name,
  86                                                 "lcd01", 5)) {
  87                                 lcd01_base = ioremap(pdev->resource[i].start,
  88                                                 pdev->resource[i].end -
  89                                                 pdev->resource[i].start + 1);
  90                                 if (!lcd01_base) {
  91                                         printk(KERN_ERR
  92                                                 "lcd01_base ioremap failed!\n");
  93                                         return -ENOMEM;
  94                                 }
  95                         } else if (!strncmp(pdev->resource[i].name,
  96                                                 "lcd02", 5)) {
  97                                 lcd02_base = ioremap(pdev->resource[i].start,
  98                                                 pdev->resource[i].end -
  99                                                 pdev->resource[i].start + 1);
 100                                 if (!lcd02_base) {
 101                                         printk(KERN_ERR
 102                                                 "lcd02_base ioremap failed!\n");
 103                                         return -ENOMEM;
 104                                 }
 105                         }
 106                 }
 107                 ebi2_lcd_resource_initialized = 1;
 108                 return 0;
 109         }
 110
 111         if (!ebi2_lcd_resource_initialized)
 112                 return -EPERM;
 113
 114         mfd = platform_get_drvdata(pdev);
 115
 116         if (!mfd)
 117                 return -ENODEV;
 118
 119         if (mfd->key != MFD_KEY)
 120                 return -EINVAL;
 121
 122         if (pdev_list_cnt >= MSM_FB_MAX_DEV_LIST)
 123                 return -ENOMEM;
 124
 125         if (ebi2_base == NULL)
 126                 return -ENOMEM;
 127
 128         mdp_dev = platform_device_alloc("mdp", pdev->id);
 129         if (!mdp_dev)
 130                 return -ENOMEM;
 131
 132         /* link to the latest pdev */
 133         mfd->pdev = mdp_dev;
 134         mfd->dest = DISPLAY_LCD;
 135
 136         /* add panel data */
 137         if (platform_device_add_data
 138             (mdp_dev, pdev->dev.platform_data,
 139              sizeof(struct msm_fb_panel_data))) {
 140                 printk(KERN_ERR "ebi2_lcd_probe: platform_device_add_data failed!\n");
 141                 platform_device_put(mdp_dev);
 142                 return -ENOMEM;
 143         }
 144
 145         /* data chain */
 146         pdata = mdp_dev->dev.platform_data;
 147         pdata->on = panel_next_on;
 148         pdata->off = panel_next_off;
 149         pdata->next = pdev;
 150
 151         /* get/set panel specific fb info */
 152         mfd->panel_info = pdata->panel_info;
 153
 154         if (mfd->panel_info.bpp == 24)
 155                 mfd->fb_imgType = MDP_RGB_888;
 156         else
 157                 mfd->fb_imgType = MDP_RGB_565;
 158
 159         /* config msm ebi2 lcd register */
 160         if (mfd->panel_info.pdest == DISPLAY_1) {
 161                 outp32(ebi2_base,
 162                        (inp32(ebi2_base) & (~(EBI2_PRIM_LCD_CLR))) |
 163                        EBI2_PRIM_LCD_SEL);
 164                 /*
 165                  * current design has one set of cfg0/1 register to control
 166                  * both EBI2 channels. so, we're using the PRIM channel to
 167                  * configure both.
 168                  */
 169                 outp32(ebi2_lcd_cfg0, mfd->panel_info.wait_cycle);
 170                 if (mfd->panel_info.bpp == 18)
 171                         outp32(ebi2_lcd_cfg1, 0x01000000);
 172                 else
 173                         outp32(ebi2_lcd_cfg1, 0x0);
 174         } else {
 175 #ifdef DEBUG_EBI2_LCD
 176                 /*
 177                  * confliting with QCOM SURF FPGA CS.
 178                  * OEM should enable below for their CS mapping
 179                  */
 180                  outp32(ebi2_base, (inp32(ebi2_base)&(~(EBI2_SECD_LCD_CLR)))
 181                                         |EBI2_SECD_LCD_SEL);
 182 #endif
 183         }
 184
 185         /*
 186          * map cs (chip select) address
 187          */
 188         if (mfd->panel_info.pdest == DISPLAY_1) {
 189                 mfd->cmd_port = lcd01_base;
 190                 mfd->data_port =
 191                     (void *)((uint32) mfd->cmd_port + EBI2_PRIM_LCD_RS_PIN);
 192                 mfd->data_port_phys =
 193                     (void *)(LCD_PRIM_BASE_PHYS + EBI2_PRIM_LCD_RS_PIN);
 194         } else {
 195                 mfd->cmd_port = lcd01_base;
 196                 mfd->data_port =
 197                     (void *)((uint32) mfd->cmd_port + EBI2_SECD_LCD_RS_PIN);
 198                 mfd->data_port_phys =
 199                     (void *)(LCD_SECD_BASE_PHYS + EBI2_SECD_LCD_RS_PIN);
 200         }
 201
 202         /*
 203          * set driver data
 204          */
 205         platform_set_drvdata(mdp_dev, mfd);
 206
 207         /*
 208          * register in mdp driver
 209          */
 210         rc = platform_device_add(mdp_dev);
 211         if (rc) {
 212                 goto ebi2_lcd_probe_err;
 213         }
 214
 215         pdev_list[pdev_list_cnt++] = pdev;
 216         return 0;
 217
 218       ebi2_lcd_probe_err:
 219         platform_device_put(mdp_dev);
 220         return rc;
 221 }
 222
 223 static int ebi2_lcd_remove(struct platform_device *pdev)
 224 {
 225         struct msm_fb_data_type *mfd;
 226
 227         mfd = (struct msm_fb_data_type *)platform_get_drvdata(pdev);
 228
 229         if (!mfd)
 230                 return 0;
 231
 232         if (mfd->key != MFD_KEY)
 233                 return 0;
 234
 235         iounmap(mfd->cmd_port);
 236
 237         return 0;
 238 }
 239
 240 static int ebi2_lcd_register_driver(void)
 241 {
 242         return platform_driver_register(&ebi2_lcd_driver);
 243 }
 244
 245 static int __init ebi2_lcd_driver_init(void)
 246 {
 247         return ebi2_lcd_register_driver();
 248 }
 249
 250 module_init(ebi2_lcd_driver_init);