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, 250 insertions, 0 deletions

diff --git a/drivers/staging/msm/ebi2_lcd.c b/drivers/staging/msm/ebi2_lcd.c
new file mode 100644
index 000000000000..b41e1230ceca
--- /dev/null
+++ b/drivers/staging/msm/ebi2_lcd.c
@@ -0,0 +1,250 @@
+/* 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/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 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",
+		   },
+};
+
+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;
+	}
+
+	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);
+
+	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);
\ No newline at end of file