fbdev: SuperH Mobile LCDC Driver

This is the SuperH Mobile LCDC frame buffer driver V2, adding support for
the LCDC block found in SuperH Mobile processors.  The hardware supports
up to two LCD panels per LCDC block, and both RGB and SYS interfaces can
be used to hook up LCD panels/modules.

The device driver is a regular platform driver, so LCD configuration and
board specific hooks are passed to the driver using platform data.  LCD
modules using SYS interface often require special configuration using the
SYS bus, and to solve this cleanly the driver provides SYS interface
operations to the board code.

Tested on sh7723 and sh7722 processors with a SYS16A QVGA panel and WVGA
panels using RGB16 and RGB18 interfaces.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Reviewed-by: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 66 insertions, 0 deletions

diff --git a/include/asm-sh/sh_mobile_lcdc.h b/include/asm-sh/sh_mobile_lcdc.h
new file mode 100644
index 000000000000..27677727df4d
--- /dev/null
+++ b/include/asm-sh/sh_mobile_lcdc.h
@@ -0,0 +1,66 @@
+#ifndef __ASM_SH_MOBILE_LCDC_H__
+#define __ASM_SH_MOBILE_LCDC_H__
+
+#include <linux/fb.h>
+
+enum { RGB8,   /* 24bpp, 8:8:8 */
+       RGB9,   /* 18bpp, 9:9 */
+       RGB12A, /* 24bpp, 12:12 */
+       RGB12B, /* 12bpp */
+       RGB16,  /* 16bpp */
+       RGB18,  /* 18bpp */
+       RGB24,  /* 24bpp */
+       SYS8A,  /* 24bpp, 8:8:8 */
+       SYS8B,  /* 18bpp, 8:8:2 */
+       SYS8C,  /* 18bpp, 2:8:8 */
+       SYS8D,  /* 16bpp, 8:8 */
+       SYS9,   /* 18bpp, 9:9 */
+       SYS12,  /* 24bpp, 12:12 */
+       SYS16A, /* 16bpp */
+       SYS16B, /* 18bpp, 16:2 */
+       SYS16C, /* 18bpp, 2:16 */
+       SYS18,  /* 18bpp */
+       SYS24 };/* 24bpp */
+
+enum { LCDC_CHAN_DISABLED = 0,
+       LCDC_CHAN_MAINLCD,
+       LCDC_CHAN_SUBLCD };
+
+enum { LCDC_CLK_BUS, LCDC_CLK_PERIPHERAL, LCDC_CLK_EXTERNAL };
+
+struct sh_mobile_lcdc_sys_bus_cfg {
+        unsigned long ldmt2r;
+        unsigned long ldmt3r;
+};
+
+struct sh_mobile_lcdc_sys_bus_ops {
+        void (*write_index)(void *handle, unsigned long data);
+        void (*write_data)(void *handle, unsigned long data);
+        unsigned long (*read_data)(void *handle);
+};
+
+struct sh_mobile_lcdc_board_cfg {
+        void *board_data;
+        int (*setup_sys)(void *board_data, void *sys_ops_handle,
+                         struct sh_mobile_lcdc_sys_bus_ops *sys_ops);
+        void (*display_on)(void *board_data);
+        void (*display_off)(void *board_data);
+};
+
+struct sh_mobile_lcdc_chan_cfg {
+        int chan;
+        int bpp;
+        int interface_type; /* selects RGBn or SYSn I/F, see above */
+        int clock_divider;
+        struct fb_videomode lcd_cfg;
+        struct sh_mobile_lcdc_board_cfg board_cfg;
+        struct sh_mobile_lcdc_sys_bus_cfg sys_bus_cfg; /* only for SYSn I/F */
+};
+
+struct sh_mobile_lcdc_info {
+        unsigned long lddckr;
+        int clock_source;
+        struct sh_mobile_lcdc_chan_cfg ch[2];
+};
+
+#endif /* __ASM_SH_MOBILE_LCDC_H__ */