drivers/video/msm/ebi2_lcd.c

/* 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.
 *
 */

#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 int ebi2_lcd_runtime_suspend(struct device *dev)
{
	dev_dbg(dev, "pm_runtime: suspending...\n");
	return 0;
}

static int ebi2_lcd_runtime_resume(struct device *dev)
{
	dev_dbg(dev, "pm_runtime: resuming...\n");
	return 0;
}

static struct dev_pm_ops ebi2_lcd_dev_pm_ops = {
	.runtime_suspend = ebi2_lcd_runtime_suspend,
	.runtime_resume = ebi2_lcd_runtime_resume,
};

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",
		   .pm = &ebi2_lcd_dev_pm_ops,
		   },
};

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;
	}

	pm_runtime_set_active(&pdev->dev);
	pm_runtime_enable(&pdev->dev);


	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);
	pm_runtime_disable(&pdev->dev);
	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);