drivers/staging/msm/mddi_ext.c - kernel/skids - Git at Google

 /* 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/kernel.h>
 #include <linux/sched.h>
 #include <linux/time.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
 #include <linux/delay.h>
 #include <mach/hardware.h>
 #include <asm/io.h>

 #include <asm/system.h>
 #include <asm/mach-types.h>
 #include <linux/semaphore.h>
 #include <linux/uaccess.h>
 #include <linux/clk.h>
 #include <mach/clk.h>
 #include <linux/platform_device.h>

 #include "msm_fb.h"
 #include "mddihosti.h"

 static int mddi_ext_probe(struct platform_device *pdev);
 static int mddi_ext_remove(struct platform_device *pdev);

 static int mddi_ext_off(struct platform_device *pdev);
 static int mddi_ext_on(struct platform_device *pdev);

 static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
 static int pdev_list_cnt;

 static int mddi_ext_suspend(struct platform_device *pdev, pm_message_t state);
 static int mddi_ext_resume(struct platform_device *pdev);

 #ifdef CONFIG_HAS_EARLYSUSPEND
 static void mddi_ext_early_suspend(struct early_suspend *h);
 static void mddi_ext_early_resume(struct early_suspend *h);
 #endif

 static struct platform_driver mddi_ext_driver = {
 	.probe = mddi_ext_probe,
 	.remove = mddi_ext_remove,
 #ifndef CONFIG_HAS_EARLYSUSPEND
 #ifdef CONFIG_PM
 	.suspend = mddi_ext_suspend,
 	.resume = mddi_ext_resume,
 #endif
 #endif
 	.resume_early = NULL,
 	.resume = NULL,
 	.shutdown = NULL,
 	.driver = {
 		   .name = "mddi_ext",
 		   },
 };

 static struct clk *mddi_ext_clk;
 static struct mddi_platform_data *mddi_ext_pdata;

 extern int int_mddi_ext_flag;

 static int mddi_ext_off(struct platform_device *pdev)
 {
 	int ret = 0;

 	ret = panel_next_off(pdev);
 	mddi_host_stop_ext_display();

 	return ret;
 }

 static int mddi_ext_on(struct platform_device *pdev)
 {
 	int ret = 0;
 	u32 clk_rate;
 	struct msm_fb_data_type *mfd;

 	mfd = platform_get_drvdata(pdev);

 	clk_rate = mfd->fbi->var.pixclock;
 	clk_rate = min(clk_rate, mfd->panel_info.clk_max);

 	if (mddi_ext_pdata &&
 	    mddi_ext_pdata->mddi_sel_clk &&
 	    mddi_ext_pdata->mddi_sel_clk(&clk_rate))
 		printk(KERN_ERR
 			  "%s: can't select mddi io clk targate rate = %d\n",
 			  __func__, clk_rate);

 	if (clk_set_min_rate(mddi_ext_clk, clk_rate) < 0)
 		printk(KERN_ERR "%s: clk_set_min_rate failed\n",
 			__func__);

 	mddi_host_start_ext_display();
 	ret = panel_next_on(pdev);

 	return ret;
 }

 static int mddi_ext_resource_initialized;

 static int mddi_ext_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;
 	resource_size_t size ;
 	u32 clk_rate;

 	if ((pdev->id == 0) && (pdev->num_resources >= 0)) {
 		mddi_ext_pdata = pdev->dev.platform_data;

 		size =  resource_size(&pdev->resource[0]);
 		msm_emdh_base = ioremap(pdev->resource[0].start, size);

 		MSM_FB_INFO("external mddi base address = 0x%x\n",
 				pdev->resource[0].start);

 		if (unlikely(!msm_emdh_base))
 			return -ENOMEM;

 		mddi_ext_resource_initialized = 1;
 		return 0;
 	}

 	if (!mddi_ext_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;

 	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_EXT_MDDI;

 	/*
 	 * alloc panel device data
 	 */
 	if (platform_device_add_data
 	    (mdp_dev, pdev->dev.platform_data,
 	     sizeof(struct msm_fb_panel_data))) {
 		printk(KERN_ERR "mddi_ext_probe: platform_device_add_data failed!\n");
 		platform_device_put(mdp_dev);
 		return -ENOMEM;
 	}
 	/*
 	 * data chain
 	 */
 	pdata = mdp_dev->dev.platform_data;
 	pdata->on = mddi_ext_on;
 	pdata->off = mddi_ext_off;
 	pdata->next = pdev;

 	/*
 	 * get/set panel specific fb info
 	 */
 	mfd->panel_info = pdata->panel_info;
 	mfd->fb_imgType = MDP_RGB_565;

 	clk_rate = mfd->panel_info.clk_max;
 	if (mddi_ext_pdata &&
 	    mddi_ext_pdata->mddi_sel_clk &&
 	    mddi_ext_pdata->mddi_sel_clk(&clk_rate))
 			printk(KERN_ERR
 			  "%s: can't select mddi io clk targate rate = %d\n",
 			  __func__, clk_rate);

 	if (clk_set_max_rate(mddi_ext_clk, clk_rate) < 0)
 		printk(KERN_ERR "%s: clk_set_max_rate failed\n", __func__);
 	mfd->panel_info.clk_rate = mfd->panel_info.clk_min;

 	/*
 	 * set driver data
 	 */
 	platform_set_drvdata(mdp_dev, mfd);

 	/*
 	 * register in mdp driver
 	 */
 	rc = platform_device_add(mdp_dev);
 	if (rc)
 		goto mddi_ext_probe_err;

 	pdev_list[pdev_list_cnt++] = pdev;

 #ifdef CONFIG_HAS_EARLYSUSPEND
 	mfd->mddi_ext_early_suspend.level = EARLY_SUSPEND_LEVEL_DISABLE_FB;
 	mfd->mddi_ext_early_suspend.suspend = mddi_ext_early_suspend;
 	mfd->mddi_ext_early_suspend.resume = mddi_ext_early_resume;
 	register_early_suspend(&mfd->mddi_ext_early_suspend);
 #endif

 	return 0;

 mddi_ext_probe_err:
 	platform_device_put(mdp_dev);
 	return rc;
 }

 static int mddi_ext_is_in_suspend;

 static int mddi_ext_suspend(struct platform_device *pdev, pm_message_t state)
 {
 	if (mddi_ext_is_in_suspend)
 		return 0;

 	mddi_ext_is_in_suspend = 1;

 	if (clk_set_min_rate(mddi_ext_clk, 0) < 0)
 		printk(KERN_ERR "%s: clk_set_min_rate failed\n", __func__);

 	clk_disable(mddi_ext_clk);
 	disable_irq(INT_MDDI_EXT);

 	return 0;
 }

 static int mddi_ext_resume(struct platform_device *pdev)
 {
 	struct msm_fb_data_type *mfd;

 	mfd = platform_get_drvdata(pdev);

 	if (!mddi_ext_is_in_suspend)
 		return 0;

 	mddi_ext_is_in_suspend = 0;
 	enable_irq(INT_MDDI_EXT);

 	clk_enable(mddi_ext_clk);

 	return 0;
 }

 #ifdef CONFIG_HAS_EARLYSUSPEND
 static void mddi_ext_early_suspend(struct early_suspend *h)
 {
 	pm_message_t state;
 	struct msm_fb_data_type *mfd = container_of(h, struct msm_fb_data_type,
 							mddi_ext_early_suspend);

 	state.event = PM_EVENT_SUSPEND;
 	mddi_ext_suspend(mfd->pdev, state);
 }

 static void mddi_ext_early_resume(struct early_suspend *h)
 {
 	struct msm_fb_data_type *mfd = container_of(h, struct msm_fb_data_type,
 							mddi_ext_early_suspend);
 	mddi_ext_resume(mfd->pdev);
 }
 #endif

 static int mddi_ext_remove(struct platform_device *pdev)
 {
 	iounmap(msm_emdh_base);
 	return 0;
 }

 static int mddi_ext_register_driver(void)
 {
 	return platform_driver_register(&mddi_ext_driver);
 }

 static int __init mddi_ext_driver_init(void)
 {
 	int ret;

 	mddi_ext_clk = clk_get(NULL, "emdh_clk");
 	if (IS_ERR(mddi_ext_clk)) {
 		printk(KERN_ERR "can't find emdh_clk\n");
 		return PTR_ERR(mddi_ext_clk);
 	}
 	clk_enable(mddi_ext_clk);

 	ret = mddi_ext_register_driver();
 	if (ret) {
 		clk_disable(mddi_ext_clk);
 		clk_put(mddi_ext_clk);
 		printk(KERN_ERR "mddi_ext_register_driver() failed!\n");
 		return ret;
 	}
 	mddi_init();

 	return ret;
 }

 module_init(mddi_ext_driver_init);
	/* 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/kernel.h>
	#include <linux/sched.h>
	#include <linux/time.h>
	#include <linux/init.h>
	#include <linux/interrupt.h>
	#include <linux/spinlock.h>
	#include <linux/delay.h>
	#include <mach/hardware.h>
	#include <asm/io.h>

	#include <asm/system.h>
	#include <asm/mach-types.h>
	#include <linux/semaphore.h>
	#include <linux/uaccess.h>
	#include <linux/clk.h>
	#include <mach/clk.h>
	#include <linux/platform_device.h>

	#include "msm_fb.h"
	#include "mddihosti.h"

	static int mddi_ext_probe(struct platform_device *pdev);
	static int mddi_ext_remove(struct platform_device *pdev);

	static int mddi_ext_off(struct platform_device *pdev);
	static int mddi_ext_on(struct platform_device *pdev);

	static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
	static int pdev_list_cnt;

	static int mddi_ext_suspend(struct platform_device *pdev, pm_message_t state);
	static int mddi_ext_resume(struct platform_device *pdev);

	#ifdef CONFIG_HAS_EARLYSUSPEND
	static void mddi_ext_early_suspend(struct early_suspend *h);
	static void mddi_ext_early_resume(struct early_suspend *h);
	#endif

	static struct platform_driver mddi_ext_driver = {
	.probe = mddi_ext_probe,
	.remove = mddi_ext_remove,
	#ifndef CONFIG_HAS_EARLYSUSPEND
	#ifdef CONFIG_PM
	.suspend = mddi_ext_suspend,
	.resume = mddi_ext_resume,
	#endif
	#endif
	.resume_early = NULL,
	.resume = NULL,
	.shutdown = NULL,
	.driver = {
	.name = "mddi_ext",
	},
	};

	static struct clk *mddi_ext_clk;
	static struct mddi_platform_data *mddi_ext_pdata;

	extern int int_mddi_ext_flag;

	static int mddi_ext_off(struct platform_device *pdev)
	{
	int ret = 0;

	ret = panel_next_off(pdev);
	mddi_host_stop_ext_display();

	return ret;
	}

	static int mddi_ext_on(struct platform_device *pdev)
	{
	int ret = 0;
	u32 clk_rate;
	struct msm_fb_data_type *mfd;

	mfd = platform_get_drvdata(pdev);

	clk_rate = mfd->fbi->var.pixclock;
	clk_rate = min(clk_rate, mfd->panel_info.clk_max);

	if (mddi_ext_pdata &&
	mddi_ext_pdata->mddi_sel_clk &&
	mddi_ext_pdata->mddi_sel_clk(&clk_rate))
	printk(KERN_ERR
	"%s: can't select mddi io clk targate rate = %d\n",
	__func__, clk_rate);

	if (clk_set_min_rate(mddi_ext_clk, clk_rate) < 0)
	printk(KERN_ERR "%s: clk_set_min_rate failed\n",
	__func__);

	mddi_host_start_ext_display();
	ret = panel_next_on(pdev);

	return ret;
	}

	static int mddi_ext_resource_initialized;

	static int mddi_ext_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;
	resource_size_t size ;
	u32 clk_rate;

	if ((pdev->id == 0) && (pdev->num_resources >= 0)) {
	mddi_ext_pdata = pdev->dev.platform_data;

	size = resource_size(&pdev->resource[0]);
	msm_emdh_base = ioremap(pdev->resource[0].start, size);

	MSM_FB_INFO("external mddi base address = 0x%x\n",
	pdev->resource[0].start);

	if (unlikely(!msm_emdh_base))
	return -ENOMEM;

	mddi_ext_resource_initialized = 1;
	return 0;
	}

	if (!mddi_ext_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;

	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_EXT_MDDI;

	/*
	* alloc panel device data
	*/
	if (platform_device_add_data
	(mdp_dev, pdev->dev.platform_data,
	sizeof(struct msm_fb_panel_data))) {
	printk(KERN_ERR "mddi_ext_probe: platform_device_add_data failed!\n");
	platform_device_put(mdp_dev);
	return -ENOMEM;
	}
	/*
	* data chain
	*/
	pdata = mdp_dev->dev.platform_data;
	pdata->on = mddi_ext_on;
	pdata->off = mddi_ext_off;
	pdata->next = pdev;

	/*
	* get/set panel specific fb info
	*/
	mfd->panel_info = pdata->panel_info;
	mfd->fb_imgType = MDP_RGB_565;

	clk_rate = mfd->panel_info.clk_max;
	if (mddi_ext_pdata &&
	mddi_ext_pdata->mddi_sel_clk &&
	mddi_ext_pdata->mddi_sel_clk(&clk_rate))
	printk(KERN_ERR
	"%s: can't select mddi io clk targate rate = %d\n",
	__func__, clk_rate);

	if (clk_set_max_rate(mddi_ext_clk, clk_rate) < 0)
	printk(KERN_ERR "%s: clk_set_max_rate failed\n", __func__);
	mfd->panel_info.clk_rate = mfd->panel_info.clk_min;

	/*
	* set driver data
	*/
	platform_set_drvdata(mdp_dev, mfd);

	/*
	* register in mdp driver
	*/
	rc = platform_device_add(mdp_dev);
	if (rc)
	goto mddi_ext_probe_err;

	pdev_list[pdev_list_cnt++] = pdev;

	#ifdef CONFIG_HAS_EARLYSUSPEND
	mfd->mddi_ext_early_suspend.level = EARLY_SUSPEND_LEVEL_DISABLE_FB;
	mfd->mddi_ext_early_suspend.suspend = mddi_ext_early_suspend;
	mfd->mddi_ext_early_suspend.resume = mddi_ext_early_resume;
	register_early_suspend(&mfd->mddi_ext_early_suspend);
	#endif

	return 0;

	mddi_ext_probe_err:
	platform_device_put(mdp_dev);
	return rc;
	}

	static int mddi_ext_is_in_suspend;

	static int mddi_ext_suspend(struct platform_device *pdev, pm_message_t state)
	{
	if (mddi_ext_is_in_suspend)
	return 0;

	mddi_ext_is_in_suspend = 1;

	if (clk_set_min_rate(mddi_ext_clk, 0) < 0)
	printk(KERN_ERR "%s: clk_set_min_rate failed\n", __func__);

	clk_disable(mddi_ext_clk);
	disable_irq(INT_MDDI_EXT);

	return 0;
	}

	static int mddi_ext_resume(struct platform_device *pdev)
	{
	struct msm_fb_data_type *mfd;

	mfd = platform_get_drvdata(pdev);

	if (!mddi_ext_is_in_suspend)
	return 0;

	mddi_ext_is_in_suspend = 0;
	enable_irq(INT_MDDI_EXT);

	clk_enable(mddi_ext_clk);

	return 0;
	}

	#ifdef CONFIG_HAS_EARLYSUSPEND
	static void mddi_ext_early_suspend(struct early_suspend *h)
	{
	pm_message_t state;
	struct msm_fb_data_type *mfd = container_of(h, struct msm_fb_data_type,
	mddi_ext_early_suspend);

	state.event = PM_EVENT_SUSPEND;
	mddi_ext_suspend(mfd->pdev, state);
	}

	static void mddi_ext_early_resume(struct early_suspend *h)
	{
	struct msm_fb_data_type *mfd = container_of(h, struct msm_fb_data_type,
	mddi_ext_early_suspend);
	mddi_ext_resume(mfd->pdev);
	}
	#endif

	static int mddi_ext_remove(struct platform_device *pdev)
	{
	iounmap(msm_emdh_base);
	return 0;
	}

	static int mddi_ext_register_driver(void)
	{
	return platform_driver_register(&mddi_ext_driver);
	}

	static int __init mddi_ext_driver_init(void)
	{
	int ret;

	mddi_ext_clk = clk_get(NULL, "emdh_clk");
	if (IS_ERR(mddi_ext_clk)) {
	printk(KERN_ERR "can't find emdh_clk\n");
	return PTR_ERR(mddi_ext_clk);
	}
	clk_enable(mddi_ext_clk);

	ret = mddi_ext_register_driver();
	if (ret) {
	clk_disable(mddi_ext_clk);
	clk_put(mddi_ext_clk);
	printk(KERN_ERR "mddi_ext_register_driver() failed!\n");
	return ret;
	}
	mddi_init();

	return ret;
	}

	module_init(mddi_ext_driver_init);