omapfb: add support for the OMAP2EVM LCD

omap2evm LCD supports VGA and QVGA resolution, by default its in VGA mode.

Fixed-by: Jarkko Nikula <jarkko.nikula@gmail.com>
Fixed-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Arun C <arunedarath@mistralsolutions.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>

2 files changed, 192 insertions, 0 deletions

diff --git a/drivers/video/omap/Makefile b/drivers/video/omap/Makefile
index 7a37b0396e97..c2475e34424c 100644
--- a/drivers/video/omap/Makefile
+++ b/drivers/video/omap/Makefile
@@ -27,6 +27,7 @@ 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$(CONFIG_MACH_OMAP2EVM) += lcd_omap2evm.o
 objs-y$(CONFIG_FB_OMAP_LCD_MIPID) += lcd_mipid.o
 
 omapfb-objs := $(objs-yy)
diff --git a/drivers/video/omap/lcd_omap2evm.c b/drivers/video/omap/lcd_omap2evm.c
new file mode 100644
index 000000000000..7a2bbe2ecec3
--- /dev/null
+++ b/drivers/video/omap/lcd_omap2evm.c
@@ -0,0 +1,191 @@
+/*
+ * LCD panel support for the MISTRAL OMAP2EVM board
+ *
+ * Author: Arun C <arunedarath@mistralsolutions.com>
+ *
+ * Derived from drivers/video/omap/lcd_omap3evm.c
+ * Derived from drivers/video/omap/lcd-apollon.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/gpio.h>
+#include <linux/i2c/twl4030.h>
+
+#include <mach/mux.h>
+#include <mach/omapfb.h>
+#include <asm/mach-types.h>
+
+#define LCD_PANEL_ENABLE_GPIO   154
+#define LCD_PANEL_LR            128
+#define LCD_PANEL_UD            129
+#define LCD_PANEL_INI           152
+#define LCD_PANEL_QVGA          148
+#define LCD_PANEL_RESB          153
+
+#define TWL_LED_LEDEN           0x00
+#define TWL_PWMA_PWMAON         0x00
+#define TWL_PWMA_PWMAOFF        0x01
+
+static unsigned int bklight_level;
+
+static int omap2evm_panel_init(struct lcd_panel *panel,
+                                struct omapfb_device *fbdev)
+{
+        gpio_request(LCD_PANEL_ENABLE_GPIO, "LCD enable");
+        gpio_request(LCD_PANEL_LR, "LCD lr");
+        gpio_request(LCD_PANEL_UD, "LCD ud");
+        gpio_request(LCD_PANEL_INI, "LCD ini");
+        gpio_request(LCD_PANEL_QVGA, "LCD qvga");
+        gpio_request(LCD_PANEL_RESB, "LCD resb");
+
+        gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 1);
+        gpio_direction_output(LCD_PANEL_RESB, 1);
+        gpio_direction_output(LCD_PANEL_INI, 1);
+        gpio_direction_output(LCD_PANEL_QVGA, 0);
+        gpio_direction_output(LCD_PANEL_LR, 1);
+        gpio_direction_output(LCD_PANEL_UD, 1);
+
+        twl4030_i2c_write_u8(TWL4030_MODULE_LED, 0x11, TWL_LED_LEDEN);
+        twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x01, TWL_PWMA_PWMAON);
+        twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x02, TWL_PWMA_PWMAOFF);
+        bklight_level = 100;
+
+        return 0;
+}
+
+static void omap2evm_panel_cleanup(struct lcd_panel *panel)
+{
+        gpio_free(LCD_PANEL_RESB);
+        gpio_free(LCD_PANEL_QVGA);
+        gpio_free(LCD_PANEL_INI);
+        gpio_free(LCD_PANEL_UD);
+        gpio_free(LCD_PANEL_LR);
+        gpio_free(LCD_PANEL_ENABLE_GPIO);
+}
+
+static int omap2evm_panel_enable(struct lcd_panel *panel)
+{
+        gpio_set_value(LCD_PANEL_ENABLE_GPIO, 0);
+        return 0;
+}
+
+static void omap2evm_panel_disable(struct lcd_panel *panel)
+{
+        gpio_set_value(LCD_PANEL_ENABLE_GPIO, 1);
+}
+
+static unsigned long omap2evm_panel_get_caps(struct lcd_panel *panel)
+{
+        return 0;
+}
+
+static int omap2evm_bklight_setlevel(struct lcd_panel *panel,
+                                                unsigned int level)
+{
+        u8 c;
+        if ((level >= 0) && (level <= 100)) {
+                c = (125 * (100 - level)) / 100 + 2;
+                twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_PWMA_PWMAOFF);
+                bklight_level = level;
+        }
+        return 0;
+}
+
+static unsigned int omap2evm_bklight_getlevel(struct lcd_panel *panel)
+{
+        return bklight_level;
+}
+
+static unsigned int omap2evm_bklight_getmaxlevel(struct lcd_panel *panel)
+{
+        return 100;
+}
+
+struct lcd_panel omap2evm_panel = {
+        .name           = "omap2evm",
+        .config         = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
+                          OMAP_LCDC_INV_HSYNC,
+
+        .bpp            = 16,
+        .data_lines     = 18,
+        .x_res          = 480,
+        .y_res          = 640,
+        .hsw            = 3,
+        .hfp            = 0,
+        .hbp            = 28,
+        .vsw            = 2,
+        .vfp            = 1,
+        .vbp            = 0,
+
+        .pixel_clock    = 20000,
+
+        .init           = omap2evm_panel_init,
+        .cleanup        = omap2evm_panel_cleanup,
+        .enable         = omap2evm_panel_enable,
+        .disable        = omap2evm_panel_disable,
+        .get_caps       = omap2evm_panel_get_caps,
+        .set_bklight_level      = omap2evm_bklight_setlevel,
+        .get_bklight_level      = omap2evm_bklight_getlevel,
+        .get_bklight_max        = omap2evm_bklight_getmaxlevel,
+};
+
+static int omap2evm_panel_probe(struct platform_device *pdev)
+{
+        omapfb_register_panel(&omap2evm_panel);
+        return 0;
+}
+
+static int omap2evm_panel_remove(struct platform_device *pdev)
+{
+        return 0;
+}
+
+static int omap2evm_panel_suspend(struct platform_device *pdev,
+                                   pm_message_t mesg)
+{
+        return 0;
+}
+
+static int omap2evm_panel_resume(struct platform_device *pdev)
+{
+        return 0;
+}
+
+struct platform_driver omap2evm_panel_driver = {
+        .probe          = omap2evm_panel_probe,
+        .remove         = omap2evm_panel_remove,
+        .suspend        = omap2evm_panel_suspend,
+        .resume         = omap2evm_panel_resume,
+        .driver         = {
+                .name   = "omap2evm_lcd",
+                .owner  = THIS_MODULE,
+        },
+};
+
+static int __init omap2evm_panel_drv_init(void)
+{
+        return platform_driver_register(&omap2evm_panel_driver);
+}
+
+static void __exit omap2evm_panel_drv_exit(void)
+{
+        platform_driver_unregister(&omap2evm_panel_driver);
+}
+
+module_init(omap2evm_panel_drv_init);
+module_exit(omap2evm_panel_drv_exit);