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, 295 insertions, 0 deletions

diff --git a/drivers/staging/msm/tvenc.c b/drivers/staging/msm/tvenc.c
new file mode 100644
index 000000000000..f41c5ac22f25
--- /dev/null
+++ b/drivers/staging/msm/tvenc.c
@@ -0,0 +1,295 @@
+/* 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 <linux/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 <linux/pm_qos_params.h>
+
+#define TVENC_C
+#include "tvenc.h"
+#include "msm_fb.h"
+
+static int tvenc_probe(struct platform_device *pdev);
+static int tvenc_remove(struct platform_device *pdev);
+
+static int tvenc_off(struct platform_device *pdev);
+static int tvenc_on(struct platform_device *pdev);
+
+static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
+static int pdev_list_cnt;
+
+static struct clk *tvenc_clk;
+static struct clk *tvdac_clk;
+
+static struct platform_driver tvenc_driver = {
+	.probe = tvenc_probe,
+	.remove = tvenc_remove,
+	.suspend = NULL,
+//	.suspend_late = NULL,
+//	.resume_early = NULL,
+	.resume = NULL,
+	.shutdown = NULL,
+	.driver = {
+		   .name = "tvenc",
+		   },
+};
+
+static struct tvenc_platform_data *tvenc_pdata;
+
+static int tvenc_off(struct platform_device *pdev)
+{
+	int ret = 0;
+
+	ret = panel_next_off(pdev);
+
+	clk_disable(tvenc_clk);
+	clk_disable(tvdac_clk);
+
+	if (tvenc_pdata && tvenc_pdata->pm_vid_en)
+		ret = tvenc_pdata->pm_vid_en(0);
+
+	//pm_qos_update_requirement(PM_QOS_SYSTEM_BUS_FREQ , "tvenc",
+	//				PM_QOS_DEFAULT_VALUE);
+
+	if (ret)
+		printk(KERN_ERR "%s: pm_vid_en(off) failed! %d\n",
+		__func__, ret);
+
+	return ret;
+}
+
+static int tvenc_on(struct platform_device *pdev)
+{
+	int ret = 0;
+
+//	pm_qos_update_requirement(PM_QOS_SYSTEM_BUS_FREQ , "tvenc",
+//				128000);
+	if (tvenc_pdata && tvenc_pdata->pm_vid_en)
+		ret = tvenc_pdata->pm_vid_en(1);
+
+	if (ret) {
+		printk(KERN_ERR "%s: pm_vid_en(on) failed! %d\n",
+		__func__, ret);
+		return ret;
+	}
+
+	clk_enable(tvenc_clk);
+	clk_enable(tvdac_clk);
+
+	ret = panel_next_on(pdev);
+
+	return ret;
+}
+
+void tvenc_gen_test_pattern(struct msm_fb_data_type *mfd)
+{
+	uint32 reg = 0, i;
+
+	reg = readl(MSM_TV_ENC_CTL);
+	reg |= TVENC_CTL_TEST_PATT_EN;
+
+	for (i = 0; i < 3; i++) {
+		TV_OUT(TV_ENC_CTL, 0);	/* disable TV encoder */
+
+		switch (i) {
+			/*
+			 * TV Encoder - Color Bar Test Pattern
+			 */
+		case 0:
+			reg |= TVENC_CTL_TPG_CLRBAR;
+			break;
+			/*
+			 * TV Encoder - Red Frame Test Pattern
+			 */
+		case 1:
+			reg |= TVENC_CTL_TPG_REDCLR;
+			break;
+			/*
+			 * TV Encoder - Modulated Ramp Test Pattern
+			 */
+		default:
+			reg |= TVENC_CTL_TPG_MODRAMP;
+			break;
+		}
+
+		TV_OUT(TV_ENC_CTL, reg);
+		mdelay(5000);
+
+		switch (i) {
+			/*
+			 * TV Encoder - Color Bar Test Pattern
+			 */
+		case 0:
+			reg &= ~TVENC_CTL_TPG_CLRBAR;
+			break;
+			/*
+			 * TV Encoder - Red Frame Test Pattern
+			 */
+		case 1:
+			reg &= ~TVENC_CTL_TPG_REDCLR;
+			break;
+			/*
+			 * TV Encoder - Modulated Ramp Test Pattern
+			 */
+		default:
+			reg &= ~TVENC_CTL_TPG_MODRAMP;
+			break;
+		}
+	}
+}
+
+static int tvenc_resource_initialized;
+
+static int tvenc_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;
+
+	if (pdev->id == 0) {
+		tvenc_base = ioremap(pdev->resource[0].start,
+					pdev->resource[0].end -
+					pdev->resource[0].start + 1);
+		if (!tvenc_base) {
+			printk(KERN_ERR
+				"tvenc_base ioremap failed!\n");
+			return -ENOMEM;
+		}
+		tvenc_pdata = pdev->dev.platform_data;
+		tvenc_resource_initialized = 1;
+		return 0;
+	}
+
+	if (!tvenc_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 (tvenc_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_TV;
+
+	/*
+	 * alloc panel device data
+	 */
+	if (platform_device_add_data
+	    (mdp_dev, pdev->dev.platform_data,
+	     sizeof(struct msm_fb_panel_data))) {
+		printk(KERN_ERR "tvenc_probe: platform_device_add_data failed!\n");
+		platform_device_put(mdp_dev);
+		return -ENOMEM;
+	}
+	/*
+	 * data chain
+	 */
+	pdata = mdp_dev->dev.platform_data;
+	pdata->on = tvenc_on;
+	pdata->off = tvenc_off;
+	pdata->next = pdev;
+
+	/*
+	 * get/set panel specific fb info
+	 */
+	mfd->panel_info = pdata->panel_info;
+	mfd->fb_imgType = MDP_YCRYCB_H2V1;
+
+	/*
+	 * set driver data
+	 */
+	platform_set_drvdata(mdp_dev, mfd);
+
+	/*
+	 * register in mdp driver
+	 */
+	rc = platform_device_add(mdp_dev);
+	if (rc)
+		goto tvenc_probe_err;
+
+	pdev_list[pdev_list_cnt++] = pdev;
+	return 0;
+
+tvenc_probe_err:
+	platform_device_put(mdp_dev);
+	return rc;
+}
+
+static int tvenc_remove(struct platform_device *pdev)
+{
+//	pm_qos_remove_requirement(PM_QOS_SYSTEM_BUS_FREQ , "tvenc");
+	return 0;
+}
+
+static int tvenc_register_driver(void)
+{
+	return platform_driver_register(&tvenc_driver);
+}
+
+static int __init tvenc_driver_init(void)
+{
+	tvenc_clk = clk_get(NULL, "tv_enc_clk");
+	tvdac_clk = clk_get(NULL, "tv_dac_clk");
+
+	if (IS_ERR(tvenc_clk)) {
+		printk(KERN_ERR "error: can't get tvenc_clk!\n");
+		return IS_ERR(tvenc_clk);
+	}
+
+	if (IS_ERR(tvdac_clk)) {
+		printk(KERN_ERR "error: can't get tvdac_clk!\n");
+		return IS_ERR(tvdac_clk);
+	}
+
+//	pm_qos_add_requirement(PM_QOS_SYSTEM_BUS_FREQ , "tvenc",
+//				PM_QOS_DEFAULT_VALUE);
+	return tvenc_register_driver();
+}
+
+module_init(tvenc_driver_init);