omapfb: add support for the ZOOM MDK LCD

Add glue to control the OMAP_LDP LCD as a frame buffer device using the
existing dispc.c driver under omapfb.

Patch updated for mainline kernel.  Note that the drivers/video/omap
should be updated to pass omap_lcd_config in platform_data.  The patch
should also be updated to compile if twl4030 is not selected, and
eventually to use the regulator framework.

Fixed-by: Jarkko Nikula <jarkko.nikula@gmail.com>
Fixed-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Stanley.Miao <stanley.miao@windriver.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Imre Deak <imre.deak@nokia.com>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 205 insertions, 0 deletions

diff --git a/drivers/video/omap/Kconfig b/drivers/video/omap/Kconfig
index eb05e0999383..2bffc07f317b 100644
--- a/drivers/video/omap/Kconfig
+++ b/drivers/video/omap/Kconfig
@@ -7,6 +7,10 @@ config FB_OMAP
         help
           Frame buffer driver for OMAP based boards.
 
+config FB_OMAP_LCD_VGA
+        bool "Use LCD in VGA mode"
+                depends on MACH_OMAP_3430SDP || MACH_OMAP_LDP
+
 choice
         depends on FB_OMAP && MACH_OVERO
         prompt "Screen resolution"
diff --git a/drivers/video/omap/Makefile b/drivers/video/omap/Makefile
index 0d2996a41b39..b63b198d1f03 100644
--- a/drivers/video/omap/Makefile
+++ b/drivers/video/omap/Makefile
@@ -29,6 +29,7 @@ objs-y$(CONFIG_MACH_OMAP_OSK) += lcd_osk.o
 objs-y$(CONFIG_MACH_OMAP_APOLLON) += lcd_apollon.o
 objs-y$(CONFIG_MACH_OMAP_2430SDP) += lcd_2430sdp.o
 objs-y$(CONFIG_MACH_OMAP_3430SDP) += lcd_2430sdp.o
+objs-y$(CONFIG_MACH_OMAP_LDP) += lcd_ldp.o
 objs-y$(CONFIG_MACH_OMAP2EVM) += lcd_omap2evm.o
 objs-y$(CONFIG_MACH_OMAP3EVM) += lcd_omap3evm.o
 objs-y$(CONFIG_MACH_OMAP3_BEAGLE) += lcd_omap3beagle.o
diff --git a/drivers/video/omap/lcd_ldp.c b/drivers/video/omap/lcd_ldp.c
new file mode 100644
index 000000000000..dbfe8974fb94
--- /dev/null
+++ b/drivers/video/omap/lcd_ldp.c
@@ -0,0 +1,200 @@
+/*
+ * LCD panel support for the TI LDP board
+ *
+ * Copyright (C) 2007 WindRiver
+ * Author: Stanley Miao <stanley.miao@windriver.com>
+ *
+ * Derived from drivers/video/omap/lcd-2430sdp.c
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * 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.,
+ * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/i2c/twl4030.h>
+
+#include <mach/gpio.h>
+#include <mach/mux.h>
+#include <mach/omapfb.h>
+#include <asm/mach-types.h>
+
+#define LCD_PANEL_BACKLIGHT_GPIO        (15 + OMAP_MAX_GPIO_LINES)
+#define LCD_PANEL_ENABLE_GPIO           (7 + OMAP_MAX_GPIO_LINES)
+
+#define LCD_PANEL_RESET_GPIO            55
+#define LCD_PANEL_QVGA_GPIO             56
+
+#ifdef CONFIG_FB_OMAP_LCD_VGA
+#define LCD_XRES                480
+#define LCD_YRES                640
+#define LCD_PIXCLOCK_MAX        41700
+#else
+#define LCD_XRES                240
+#define LCD_YRES                320
+#define LCD_PIXCLOCK_MAX        185186
+#endif
+
+#define PM_RECEIVER             TWL4030_MODULE_PM_RECEIVER
+#define ENABLE_VAUX2_DEDICATED  0x09
+#define ENABLE_VAUX2_DEV_GRP    0x20
+#define ENABLE_VAUX3_DEDICATED  0x03
+#define ENABLE_VAUX3_DEV_GRP    0x20
+
+#define ENABLE_VPLL2_DEDICATED          0x05
+#define ENABLE_VPLL2_DEV_GRP            0xE0
+#define TWL4030_VPLL2_DEV_GRP           0x33
+#define TWL4030_VPLL2_DEDICATED         0x36
+
+#define t2_out(c, r, v) twl4030_i2c_write_u8(c, r, v)
+
+
+static int ldp_panel_init(struct lcd_panel *panel,
+                                struct omapfb_device *fbdev)
+{
+        gpio_request(LCD_PANEL_RESET_GPIO, "lcd reset");
+        gpio_request(LCD_PANEL_QVGA_GPIO, "lcd qvga");
+        gpio_request(LCD_PANEL_ENABLE_GPIO, "lcd panel");
+        gpio_request(LCD_PANEL_BACKLIGHT_GPIO, "lcd backlight");
+
+        gpio_direction_output(LCD_PANEL_QVGA_GPIO, 0);
+        gpio_direction_output(LCD_PANEL_RESET_GPIO, 0);
+        gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 0);
+        gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 0);
+
+#ifdef CONFIG_FB_OMAP_LCD_VGA
+        gpio_set_value(LCD_PANEL_QVGA_GPIO, 0);
+#else
+        gpio_set_value(LCD_PANEL_QVGA_GPIO, 1);
+#endif
+        gpio_set_value(LCD_PANEL_RESET_GPIO, 1);
+
+        return 0;
+}
+
+static void ldp_panel_cleanup(struct lcd_panel *panel)
+{
+        gpio_free(LCD_PANEL_BACKLIGHT_GPIO);
+        gpio_free(LCD_PANEL_ENABLE_GPIO);
+        gpio_free(LCD_PANEL_QVGA_GPIO);
+        gpio_free(LCD_PANEL_RESET_GPIO);
+}
+
+static int ldp_panel_enable(struct lcd_panel *panel)
+{
+        if (0 != t2_out(PM_RECEIVER, ENABLE_VPLL2_DEDICATED,
+                        TWL4030_VPLL2_DEDICATED))
+                return -EIO;
+        if (0 != t2_out(PM_RECEIVER, ENABLE_VPLL2_DEV_GRP,
+                        TWL4030_VPLL2_DEV_GRP))
+                return -EIO;
+
+        gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 1);
+        gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 1);
+
+        if (0 != t2_out(PM_RECEIVER, ENABLE_VAUX3_DEDICATED,
+                                TWL4030_VAUX3_DEDICATED))
+                return -EIO;
+        if (0 != t2_out(PM_RECEIVER, ENABLE_VAUX3_DEV_GRP,
+                                TWL4030_VAUX3_DEV_GRP))
+                return -EIO;
+
+        return 0;
+}
+
+static void ldp_panel_disable(struct lcd_panel *panel)
+{
+        gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 0);
+        gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 0);
+
+        t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEDICATED);
+        t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEV_GRP);
+        msleep(4);
+}
+
+static unsigned long ldp_panel_get_caps(struct lcd_panel *panel)
+{
+        return 0;
+}
+
+struct lcd_panel ldp_panel = {
+        .name           = "ldp",
+        .config         = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
+                          OMAP_LCDC_INV_HSYNC,
+
+        .bpp            = 16,
+        .data_lines     = 18,
+        .x_res          = LCD_XRES,
+        .y_res          = LCD_YRES,
+        .hsw            = 3,            /* hsync_len (4) - 1 */
+        .hfp            = 3,            /* right_margin (4) - 1 */
+        .hbp            = 39,           /* left_margin (40) - 1 */
+        .vsw            = 1,            /* vsync_len (2) - 1 */
+        .vfp            = 2,            /* lower_margin */
+        .vbp            = 7,            /* upper_margin (8) - 1 */
+
+        .pixel_clock    = LCD_PIXCLOCK_MAX,
+
+        .init           = ldp_panel_init,
+        .cleanup        = ldp_panel_cleanup,
+        .enable         = ldp_panel_enable,
+        .disable        = ldp_panel_disable,
+        .get_caps       = ldp_panel_get_caps,
+};
+
+static int ldp_panel_probe(struct platform_device *pdev)
+{
+        omapfb_register_panel(&ldp_panel);
+        return 0;
+}
+
+static int ldp_panel_remove(struct platform_device *pdev)
+{
+        return 0;
+}
+
+static int ldp_panel_suspend(struct platform_device *pdev, pm_message_t mesg)
+{
+        return 0;
+}
+
+static int ldp_panel_resume(struct platform_device *pdev)
+{
+        return 0;
+}
+
+struct platform_driver ldp_panel_driver = {
+        .probe          = ldp_panel_probe,
+        .remove         = ldp_panel_remove,
+        .suspend        = ldp_panel_suspend,
+        .resume         = ldp_panel_resume,
+        .driver         = {
+                .name   = "ldp_lcd",
+                .owner  = THIS_MODULE,
+        },
+};
+
+static int __init ldp_panel_drv_init(void)
+{
+        return platform_driver_register(&ldp_panel_driver);
+}
+
+static void __exit ldp_panel_drv_exit(void)
+{
+        platform_driver_unregister(&ldp_panel_driver);
+}
+
+module_init(ldp_panel_drv_init);
+module_exit(ldp_panel_drv_exit);