/drivers/staging/msm/ebi2_lcd.c
https://bitbucket.org/slukk/jb-tsm-kernel-4.2 · C · 250 lines · 176 code · 35 blank · 39 comment · 34 complexity · a0d1d6554b2e6422c9eccc2ce54a9d15 MD5 · raw file
- /* Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- */
- #include <linux/module.h>
- #include <linux/moduleparam.h>
- #include <linux/kernel.h>
- #include <linux/slab.h>
- #include <linux/delay.h>
- #include <linux/mm.h>
- #include <linux/fb.h>
- #include <linux/init.h>
- #include <linux/ioport.h>
- #include <linux/device.h>
- #include <linux/dma-mapping.h>
- #include <linux/uaccess.h>
- #include <linux/workqueue.h>
- #include <linux/string.h>
- #include <linux/version.h>
- #include <linux/proc_fs.h>
- #include <linux/vmalloc.h>
- #include <linux/debugfs.h>
- #include "msm_fb.h"
- static int ebi2_lcd_probe(struct platform_device *pdev);
- static int ebi2_lcd_remove(struct platform_device *pdev);
- static struct platform_driver ebi2_lcd_driver = {
- .probe = ebi2_lcd_probe,
- .remove = ebi2_lcd_remove,
- .suspend = NULL,
- .suspend_late = NULL,
- .resume_early = NULL,
- .resume = NULL,
- .shutdown = NULL,
- .driver = {
- .name = "ebi2_lcd",
- },
- };
- static void *ebi2_base;
- static void *ebi2_lcd_cfg0;
- static void *ebi2_lcd_cfg1;
- static void __iomem *lcd01_base;
- static void __iomem *lcd02_base;
- static int ebi2_lcd_resource_initialized;
- static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
- static int pdev_list_cnt;
- static int ebi2_lcd_probe(struct platform_device *pdev)
- {
- struct msm_fb_data_type *mfd;
- struct platform_device *mdp_dev = NULL;
- struct msm_fb_panel_data *pdata = NULL;
- int rc, i;
- if (pdev->id == 0) {
- for (i = 0; i < pdev->num_resources; i++) {
- if (!strncmp(pdev->resource[i].name, "base", 4)) {
- ebi2_base = ioremap(pdev->resource[i].start,
- pdev->resource[i].end -
- pdev->resource[i].start + 1);
- if (!ebi2_base) {
- printk(KERN_ERR
- "ebi2_base ioremap failed!\n");
- return -ENOMEM;
- }
- ebi2_lcd_cfg0 = (void *)(ebi2_base + 0x20);
- ebi2_lcd_cfg1 = (void *)(ebi2_base + 0x24);
- } else if (!strncmp(pdev->resource[i].name,
- "lcd01", 5)) {
- lcd01_base = ioremap(pdev->resource[i].start,
- pdev->resource[i].end -
- pdev->resource[i].start + 1);
- if (!lcd01_base) {
- printk(KERN_ERR
- "lcd01_base ioremap failed!\n");
- return -ENOMEM;
- }
- } else if (!strncmp(pdev->resource[i].name,
- "lcd02", 5)) {
- lcd02_base = ioremap(pdev->resource[i].start,
- pdev->resource[i].end -
- pdev->resource[i].start + 1);
- if (!lcd02_base) {
- printk(KERN_ERR
- "lcd02_base ioremap failed!\n");
- return -ENOMEM;
- }
- }
- }
- ebi2_lcd_resource_initialized = 1;
- return 0;
- }
- if (!ebi2_lcd_resource_initialized)
- return -EPERM;
- mfd = platform_get_drvdata(pdev);
- if (!mfd)
- return -ENODEV;
- if (mfd->key != MFD_KEY)
- return -EINVAL;
- if (pdev_list_cnt >= MSM_FB_MAX_DEV_LIST)
- return -ENOMEM;
- if (ebi2_base == NULL)
- return -ENOMEM;
- mdp_dev = platform_device_alloc("mdp", pdev->id);
- if (!mdp_dev)
- return -ENOMEM;
- /* link to the latest pdev */
- mfd->pdev = mdp_dev;
- mfd->dest = DISPLAY_LCD;
- /* add panel data */
- if (platform_device_add_data
- (mdp_dev, pdev->dev.platform_data,
- sizeof(struct msm_fb_panel_data))) {
- printk(KERN_ERR "ebi2_lcd_probe: platform_device_add_data failed!\n");
- platform_device_put(mdp_dev);
- return -ENOMEM;
- }
- /* data chain */
- pdata = mdp_dev->dev.platform_data;
- pdata->on = panel_next_on;
- pdata->off = panel_next_off;
- pdata->next = pdev;
- /* get/set panel specific fb info */
- mfd->panel_info = pdata->panel_info;
- if (mfd->panel_info.bpp == 24)
- mfd->fb_imgType = MDP_RGB_888;
- else
- mfd->fb_imgType = MDP_RGB_565;
- /* config msm ebi2 lcd register */
- if (mfd->panel_info.pdest == DISPLAY_1) {
- outp32(ebi2_base,
- (inp32(ebi2_base) & (~(EBI2_PRIM_LCD_CLR))) |
- EBI2_PRIM_LCD_SEL);
- /*
- * current design has one set of cfg0/1 register to control
- * both EBI2 channels. so, we're using the PRIM channel to
- * configure both.
- */
- outp32(ebi2_lcd_cfg0, mfd->panel_info.wait_cycle);
- if (mfd->panel_info.bpp == 18)
- outp32(ebi2_lcd_cfg1, 0x01000000);
- else
- outp32(ebi2_lcd_cfg1, 0x0);
- } else {
- #ifdef DEBUG_EBI2_LCD
- /*
- * confliting with QCOM SURF FPGA CS.
- * OEM should enable below for their CS mapping
- */
- outp32(ebi2_base, (inp32(ebi2_base)&(~(EBI2_SECD_LCD_CLR)))
- |EBI2_SECD_LCD_SEL);
- #endif
- }
- /*
- * map cs (chip select) address
- */
- if (mfd->panel_info.pdest == DISPLAY_1) {
- mfd->cmd_port = lcd01_base;
- mfd->data_port =
- (void *)((uint32) mfd->cmd_port + EBI2_PRIM_LCD_RS_PIN);
- mfd->data_port_phys =
- (void *)(LCD_PRIM_BASE_PHYS + EBI2_PRIM_LCD_RS_PIN);
- } else {
- mfd->cmd_port = lcd01_base;
- mfd->data_port =
- (void *)((uint32) mfd->cmd_port + EBI2_SECD_LCD_RS_PIN);
- mfd->data_port_phys =
- (void *)(LCD_SECD_BASE_PHYS + EBI2_SECD_LCD_RS_PIN);
- }
- /*
- * set driver data
- */
- platform_set_drvdata(mdp_dev, mfd);
- /*
- * register in mdp driver
- */
- rc = platform_device_add(mdp_dev);
- if (rc) {
- goto ebi2_lcd_probe_err;
- }
- pdev_list[pdev_list_cnt++] = pdev;
- return 0;
- ebi2_lcd_probe_err:
- platform_device_put(mdp_dev);
- return rc;
- }
- static int ebi2_lcd_remove(struct platform_device *pdev)
- {
- struct msm_fb_data_type *mfd;
- mfd = (struct msm_fb_data_type *)platform_get_drvdata(pdev);
- if (!mfd)
- return 0;
- if (mfd->key != MFD_KEY)
- return 0;
- iounmap(mfd->cmd_port);
- return 0;
- }
- static int ebi2_lcd_register_driver(void)
- {
- return platform_driver_register(&ebi2_lcd_driver);
- }
- static int __init ebi2_lcd_driver_init(void)
- {
- return ebi2_lcd_register_driver();
- }
- module_init(ebi2_lcd_driver_init);