Staging: add MSM framebuffer driver

Qualcomm development of the MSM SOC framebuffer driver has
diverged significantly from the driver used by Android. This
is a snapshot of our current driver, in all it's agony. We are
putting this in staging to help with the process of converging
the two drivers.

At this point, the driver has been tested only in dumb
framebuffer mode.

Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
[dwalker@codeaurora.org: added a small compile fix and TODO.]
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 375 insertions, 0 deletions

diff --git a/drivers/staging/msm/mddi.c b/drivers/staging/msm/mddi.c
new file mode 100644
index 00000000000..132eb1adff1
--- /dev/null
+++ b/drivers/staging/msm/mddi.c
@@ -0,0 +1,375 @@
+/* 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 <linux/platform_device.h>
+
+#include "msm_fb.h"
+#include "mddihosti.h"
+#include "mddihost.h"
+#include <mach/gpio.h>
+#include <mach/clk.h>
+
+static int mddi_probe(struct platform_device *pdev);
+static int mddi_remove(struct platform_device *pdev);
+
+static int mddi_off(struct platform_device *pdev);
+static int mddi_on(struct platform_device *pdev);
+
+static int mddi_suspend(struct platform_device *pdev, pm_message_t state);
+static int mddi_resume(struct platform_device *pdev);
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+static void mddi_early_suspend(struct early_suspend *h);
+static void mddi_early_resume(struct early_suspend *h);
+#endif
+
+static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
+static int pdev_list_cnt;
+static struct clk *mddi_clk;
+static struct clk *mddi_pclk;
+static struct mddi_platform_data *mddi_pdata;
+
+static struct platform_driver mddi_driver = {
+	.probe = mddi_probe,
+	.remove = mddi_remove,
+#ifndef CONFIG_HAS_EARLYSUSPEND
+#ifdef CONFIG_PM
+	.suspend = mddi_suspend,
+	.resume = mddi_resume,
+#endif
+#endif
+	.suspend_late = NULL,
+	.resume_early = NULL,
+	.shutdown = NULL,
+	.driver = {
+		   .name = "mddi",
+		   },
+};
+
+extern int int_mddi_pri_flag;
+
+static int mddi_off(struct platform_device *pdev)
+{
+	int ret = 0;
+
+	ret = panel_next_off(pdev);
+
+	if (mddi_pdata && mddi_pdata->mddi_power_save)
+		mddi_pdata->mddi_power_save(0);
+
+	return ret;
+}
+
+static int mddi_on(struct platform_device *pdev)
+{
+	int ret = 0;
+	u32 clk_rate;
+	struct msm_fb_data_type *mfd;
+
+	mfd = platform_get_drvdata(pdev);
+
+	if (mddi_pdata && mddi_pdata->mddi_power_save)
+		mddi_pdata->mddi_power_save(1);
+
+	clk_rate = mfd->fbi->var.pixclock;
+	clk_rate = min(clk_rate, mfd->panel_info.clk_max);
+
+	if (mddi_pdata &&
+	    mddi_pdata->mddi_sel_clk &&
+	    mddi_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_clk, clk_rate) < 0)
+		printk(KERN_ERR "%s: clk_set_min_rate failed\n",
+			__func__);
+
+	ret = panel_next_on(pdev);
+
+	return ret;
+}
+
+static int mddi_resource_initialized;
+
+static int mddi_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_pdata = pdev->dev.platform_data;
+
+		size =  resource_size(&pdev->resource[0]);
+		msm_pmdh_base =  ioremap(pdev->resource[0].start, size);
+
+		MSM_FB_INFO("primary mddi base phy_addr = 0x%x virt = 0x%x\n",
+				pdev->resource[0].start, (int) msm_pmdh_base);
+
+		if (unlikely(!msm_pmdh_base))
+			return -ENOMEM;
+
+		if (mddi_pdata && mddi_pdata->mddi_power_save)
+			mddi_pdata->mddi_power_save(1);
+
+		mddi_resource_initialized = 1;
+		return 0;
+	}
+
+	if (!mddi_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_LCD;
+
+	/*
+	 * 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_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_on;
+	pdata->off = mddi_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_pdata &&
+	    mddi_pdata->mddi_sel_clk &&
+	    mddi_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_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_probe_err;
+
+	pdev_list[pdev_list_cnt++] = pdev;
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+	mfd->mddi_early_suspend.level = EARLY_SUSPEND_LEVEL_DISABLE_FB;
+	mfd->mddi_early_suspend.suspend = mddi_early_suspend;
+	mfd->mddi_early_suspend.resume = mddi_early_resume;
+	register_early_suspend(&mfd->mddi_early_suspend);
+#endif
+
+	return 0;
+
+mddi_probe_err:
+	platform_device_put(mdp_dev);
+	return rc;
+}
+
+static int mddi_pad_ctrl;
+static int mddi_power_locked;
+static int mddi_is_in_suspend;
+
+void mddi_disable(int lock)
+{
+	mddi_host_type host_idx = MDDI_HOST_PRIM;
+
+	if (mddi_power_locked)
+		return;
+
+	if (lock)
+		mddi_power_locked = 1;
+
+	if (mddi_host_timer.function)
+		del_timer_sync(&mddi_host_timer);
+
+	mddi_pad_ctrl = mddi_host_reg_in(PAD_CTL);
+	mddi_host_reg_out(PAD_CTL, 0x0);
+
+	if (clk_set_min_rate(mddi_clk, 0) < 0)
+		printk(KERN_ERR "%s: clk_set_min_rate failed\n", __func__);
+
+	clk_disable(mddi_clk);
+	if (mddi_pclk)
+		clk_disable(mddi_pclk);
+	disable_irq(INT_MDDI_PRI);
+
+	if (mddi_pdata && mddi_pdata->mddi_power_save)
+		mddi_pdata->mddi_power_save(0);
+}
+
+static int mddi_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	if (mddi_is_in_suspend)
+		return 0;
+
+	mddi_is_in_suspend = 1;
+	mddi_disable(0);
+	return 0;
+}
+
+static int mddi_resume(struct platform_device *pdev)
+{
+	mddi_host_type host_idx = MDDI_HOST_PRIM;
+
+	if (!mddi_is_in_suspend)
+		return 0;
+
+	mddi_is_in_suspend = 0;
+
+	if (mddi_power_locked)
+		return 0;
+
+	enable_irq(INT_MDDI_PRI);
+	clk_enable(mddi_clk);
+	if (mddi_pclk)
+		clk_enable(mddi_pclk);
+	mddi_host_reg_out(PAD_CTL, mddi_pad_ctrl);
+
+	if (mddi_host_timer.function)
+		mddi_host_timer_service(0);
+
+	return 0;
+}
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+static void mddi_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_early_suspend);
+
+	state.event = PM_EVENT_SUSPEND;
+	mddi_suspend(mfd->pdev, state);
+}
+
+static void mddi_early_resume(struct early_suspend *h)
+{
+	struct msm_fb_data_type *mfd = container_of(h, struct msm_fb_data_type,
+							mddi_early_suspend);
+	mddi_resume(mfd->pdev);
+}
+#endif
+
+static int mddi_remove(struct platform_device *pdev)
+{
+	if (mddi_host_timer.function)
+		del_timer_sync(&mddi_host_timer);
+
+	iounmap(msm_pmdh_base);
+
+	return 0;
+}
+
+static int mddi_register_driver(void)
+{
+	return platform_driver_register(&mddi_driver);
+}
+
+static int __init mddi_driver_init(void)
+{
+	int ret;
+
+	mddi_clk = clk_get(NULL, "mddi_clk");
+	if (IS_ERR(mddi_clk)) {
+		printk(KERN_ERR "can't find mddi_clk \n");
+		return PTR_ERR(mddi_clk);
+	}
+	clk_enable(mddi_clk);
+
+	mddi_pclk = clk_get(NULL, "mddi_pclk");
+	if (IS_ERR(mddi_pclk))
+		mddi_pclk = NULL;
+	else
+		clk_enable(mddi_pclk);
+
+	ret = mddi_register_driver();
+	if (ret) {
+		clk_disable(mddi_clk);
+		clk_put(mddi_clk);
+		if (mddi_pclk) {
+			clk_disable(mddi_pclk);
+			clk_put(mddi_pclk);
+		}
+		printk(KERN_ERR "mddi_register_driver() failed!\n");
+		return ret;
+	}
+
+	mddi_init();
+
+	return ret;
+}
+
+module_init(mddi_driver_init);