omapfb: add support for the OMAP3 EVM LCD
Steve Sakoman [Tue, 22 Sep 2009 23:46:49 +0000 (16:46 -0700)]
Add LCD support for OMAP3 EVM

Backlight support by Arun C <arunedarath@mistralsolutions.com>

Fixed-by: Jarkko Nikula <jarkko.nikula@gmail.com>
Fixed-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Acked-by: Syed Mohammed Khasim <khasim@ti.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>

drivers/video/omap/Makefile
drivers/video/omap/lcd_omap3evm.c [new file with mode: 0644]

index 96d2d43..4345157 100644 (file)
@@ -30,6 +30,7 @@ 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_OMAP2EVM) += lcd_omap2evm.o
+objs-y$(CONFIG_MACH_OMAP3EVM) += lcd_omap3evm.o
 objs-y$(CONFIG_FB_OMAP_LCD_MIPID) += lcd_mipid.o
 
 omapfb-objs := $(objs-yy)
diff --git a/drivers/video/omap/lcd_omap3evm.c b/drivers/video/omap/lcd_omap3evm.c
new file mode 100644 (file)
index 0000000..b6a4c2c
--- /dev/null
@@ -0,0 +1,192 @@
+/*
+ * LCD panel support for the TI OMAP3 EVM board
+ *
+ * Author: Steve Sakoman <steve@sakoman.com>
+ *
+ * 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       153
+#define LCD_PANEL_LR                2
+#define LCD_PANEL_UD                3
+#define LCD_PANEL_INI               152
+#define LCD_PANEL_QVGA              154
+#define LCD_PANEL_RESB              155
+
+#define ENABLE_VDAC_DEDICATED  0x03
+#define ENABLE_VDAC_DEV_GRP    0x20
+#define ENABLE_VPLL2_DEDICATED 0x05
+#define ENABLE_VPLL2_DEV_GRP   0xE0
+
+#define TWL_LED_LEDEN          0x00
+#define TWL_PWMA_PWMAON                0x00
+#define TWL_PWMA_PWMAOFF       0x01
+
+static unsigned int bklight_level;
+
+static int omap3evm_panel_init(struct lcd_panel *panel,
+                               struct omapfb_device *fbdev)
+{
+       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_RESB, "LCD resb");
+       gpio_request(LCD_PANEL_QVGA, "LCD qvga");
+
+       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 omap3evm_panel_cleanup(struct lcd_panel *panel)
+{
+       gpio_free(LCD_PANEL_QVGA);
+       gpio_free(LCD_PANEL_RESB);
+       gpio_free(LCD_PANEL_INI);
+       gpio_free(LCD_PANEL_UD);
+       gpio_free(LCD_PANEL_LR);
+}
+
+static int omap3evm_panel_enable(struct lcd_panel *panel)
+{
+       gpio_set_value(LCD_PANEL_ENABLE_GPIO, 0);
+       return 0;
+}
+
+static void omap3evm_panel_disable(struct lcd_panel *panel)
+{
+       gpio_set_value(LCD_PANEL_ENABLE_GPIO, 1);
+}
+
+static unsigned long omap3evm_panel_get_caps(struct lcd_panel *panel)
+{
+       return 0;
+}
+
+static int omap3evm_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 omap3evm_bklight_getlevel(struct lcd_panel *panel)
+{
+       return bklight_level;
+}
+
+static unsigned int omap3evm_bklight_getmaxlevel(struct lcd_panel *panel)
+{
+       return 100;
+}
+
+struct lcd_panel omap3evm_panel = {
+       .name           = "omap3evm",
+       .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,            /* 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    = 26000,
+
+       .init           = omap3evm_panel_init,
+       .cleanup        = omap3evm_panel_cleanup,
+       .enable         = omap3evm_panel_enable,
+       .disable        = omap3evm_panel_disable,
+       .get_caps       = omap3evm_panel_get_caps,
+       .set_bklight_level      = omap3evm_bklight_setlevel,
+       .get_bklight_level      = omap3evm_bklight_getlevel,
+       .get_bklight_max        = omap3evm_bklight_getmaxlevel,
+};
+
+static int omap3evm_panel_probe(struct platform_device *pdev)
+{
+       omapfb_register_panel(&omap3evm_panel);
+       return 0;
+}
+
+static int omap3evm_panel_remove(struct platform_device *pdev)
+{
+       return 0;
+}
+
+static int omap3evm_panel_suspend(struct platform_device *pdev,
+                                  pm_message_t mesg)
+{
+       return 0;
+}
+
+static int omap3evm_panel_resume(struct platform_device *pdev)
+{
+       return 0;
+}
+
+struct platform_driver omap3evm_panel_driver = {
+       .probe          = omap3evm_panel_probe,
+       .remove         = omap3evm_panel_remove,
+       .suspend        = omap3evm_panel_suspend,
+       .resume         = omap3evm_panel_resume,
+       .driver         = {
+               .name   = "omap3evm_lcd",
+               .owner  = THIS_MODULE,
+       },
+};
+
+static int __init omap3evm_panel_drv_init(void)
+{
+       return platform_driver_register(&omap3evm_panel_driver);
+}
+
+static void __exit omap3evm_panel_drv_exit(void)
+{
+       platform_driver_unregister(&omap3evm_panel_driver);
+}
+
+module_init(omap3evm_panel_drv_init);
+module_exit(omap3evm_panel_drv_exit);