1 files changed, 320 insertions, 0 deletions

diff --git a/drivers/staging/msm/mddi_ext.c b/drivers/staging/msm/mddi_ext.c
new file mode 100644
index 00000000000..c0c168c7199
--- /dev/null
+++ b/drivers/staging/msm/mddi_ext.c
@@ -0,0 +1,320 @@
+/* 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);