[PATCH]NUC900 LCD Controller Driver
Qiang Wang
There is the patch of LCD controller driver for nuc900s.
The Linux LOGO is just fine and the FB-Test application is ok too.
best regards
wangqiang
Signed-off-by: Wang Qiang <ruralit...@gmail.com>
Cc:Wang Zongshun <mcuo...@gmail.com>
---
diff --git a/arch/arm/configs/nuc950_defconfig
b/arch/arm/configs/nuc950_defconfig
index 97300ec..51cc2a2 100644
--- a/arch/arm/configs/nuc950_defconfig
+++ b/arch/arm/configs/nuc950_defconfig
@@ -590,8 +590,40 @@ CONFIG_SSB_POSSIBLE=y
#
# CONFIG_VGASTATE is not set
# CONFIG_VIDEO_OUTPUT_CONTROL is not set
-# CONFIG_FB is not set
# CONFIG_BACKLIGHT_LCD_SUPPORT is not set
+CONFIG_FB=y
+# CONFIG_FIRMWARE_EDID is not set
+# CONFIG_FB_DDC is not set
+# CONFIG_FB_BOOT_VESA_SUPPORT is not set
+CONFIG_FB_CFB_FILLRECT=y
+CONFIG_FB_CFB_COPYAREA=y
+CONFIG_FB_CFB_IMAGEBLIT=y
+# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
+# CONFIG_FB_SYS_FILLRECT is not set
+# CONFIG_FB_SYS_COPYAREA is not set
+# CONFIG_FB_SYS_IMAGEBLIT is not set
+# CONFIG_FB_FOREIGN_ENDIAN is not set
+# CONFIG_FB_SYS_FOPS is not set
+# CONFIG_FB_SVGALIB is not set
+# CONFIG_FB_MACMODES is not set
+# CONFIG_FB_BACKLIGHT is not set
+# CONFIG_FB_MODE_HELPERS is not set
+# CONFIG_FB_TILEBLITTING is not set
+
+#
+# Frame buffer hardware drivers
+#
+# CONFIG_FB_S1D13XXX is not set
+CONFIG_FB_NUC900=y
+CONFIG_GPM1040A0_320X240=y
+CONFIG_FB_NUC900_DEBUG=y
+# CONFIG_FB_VIRTUAL is not set
+# CONFIG_FB_METRONOME is not set
+# CONFIG_FB_MB862XX is not set
+# CONFIG_FB_BROADSHEET is not set
+# CONFIG_BACKLIGHT_LCD_SUPPORT is not set
+
+
#
# Display device support
@@ -603,6 +635,25 @@ CONFIG_SSB_POSSIBLE=y
#
# CONFIG_VGA_CONSOLE is not set
CONFIG_DUMMY_CONSOLE=y
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
+# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
+CONFIG_FONTS=y
+# CONFIG_FONT_8x8 is not set
+CONFIG_FONT_8x16=y
+# CONFIG_FONT_6x11 is not set
+# CONFIG_FONT_7x14 is not set
+# CONFIG_FONT_PEARL_8x8 is not set
+# CONFIG_FONT_ACORN_8x8 is not set
+# CONFIG_FONT_MINI_4x6 is not set
+# CONFIG_FONT_SUN8x16 is not set
+# CONFIG_FONT_SUN12x22 is not set
+# CONFIG_FONT_10x18 is not set
+CONFIG_LOGO=y
+# CONFIG_LOGO_LINUX_MONO is not set
+# CONFIG_LOGO_LINUX_VGA16 is not set
+CONFIG_LOGO_LINUX_CLUT224=y
+
# CONFIG_SOUND is not set
# CONFIG_HID_SUPPORT is not set
CONFIG_USB_SUPPORT=y
diff --git a/arch/arm/mach-w90x900/cpu.h b/arch/arm/mach-w90x900/cpu.h
index 4d58ba1..f8730b6 100644
--- a/arch/arm/mach-w90x900/cpu.h
+++ b/arch/arm/mach-w90x900/cpu.h
@@ -57,3 +57,4 @@ extern struct platform_device nuc900_device_fmi;
extern struct platform_device nuc900_device_kpi;
extern struct platform_device nuc900_device_rtc;
extern struct platform_device nuc900_device_ts;
+extern struct platform_device nuc900_device_lcd;
diff --git a/arch/arm/mach-w90x900/dev.c b/arch/arm/mach-w90x900/dev.c
index ec711f4..298c7a2 100644
--- a/arch/arm/mach-w90x900/dev.c
+++ b/arch/arm/mach-w90x900/dev.c
@@ -34,6 +34,7 @@
#include <mach/regs-serial.h>
#include <mach/nuc900_spi.h>
#include <mach/map.h>
+#include <mach/fb.h>
#include "cpu.h"
@@ -380,6 +381,48 @@ struct platform_device nuc900_device_kpi = {
.resource = nuc900_kpi_resource,
};
+#ifdef CONFIG_FB_NUC900
+
+static struct resource nuc900_lcd_resource[] = {
+ [0] = {
+ .start = W90X900_PA_LCD,
+ .end = W90X900_PA_LCD + W90X900_SZ_LCD - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_LCD,
+ .end = IRQ_LCD,
+ .flags = IORESOURCE_IRQ,
+ }
+};
+
+static u64 nuc900_device_lcd_dmamask = 0xffffffffUL;
+
+struct platform_device nuc900_device_lcd = {
+ .name = "nuc900-lcd",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(nuc900_lcd_resource),
+ .resource = nuc900_lcd_resource,
+ .dev = {
+ .dma_mask = &nuc900_device_lcd_dmamask,
+ .coherent_dma_mask = 0xffffffffUL
+ }
+};
+
+void nuc900_fb_set_platdata(struct nuc900fb_mach_info *pd)
+{
+ struct nuc900fb_mach_info *npd;
+
+ npd = kmalloc(sizeof(*npd), GFP_KERNEL);
+ if (npd) {
+ memcpy(npd, pd, sizeof(*npd));
+ nuc900_device_lcd.dev.platform_data = npd;
+ } else {
+ printk(KERN_ERR "no memory for LCD platform data\n");
+ }
+}
+#endif
+
/*Here should be your evb resourse,such as LCD*/
static struct platform_device *nuc900_public_dev[] __initdata = {
diff --git a/arch/arm/mach-w90x900/include/mach/fb.h
b/arch/arm/mach-w90x900/include/mach/fb.h
new file mode 100644
index 0000000..cec5ece
--- /dev/null
+++ b/arch/arm/mach-w90x900/include/mach/fb.h
@@ -0,0 +1,83 @@
+/* linux/include/asm/arch-nuc900/fb.h
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ * 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 as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Changelog:
+ *
+ * 2008/08/26 vincen.zswan modify this file for LCD.
+ */
+
+#ifndef __ASM_ARM_FB_H
+#define __ASM_ARM_FB_H
+
+
+
+/* LCD Controller Hardware Desc */
+struct nuc900fb_hw {
+ unsigned int lcd_dccs;
+ unsigned int lcd_device_ctrl;
+ unsigned int lcd_mpulcd_cmd;
+ unsigned int lcd_int_cs;
+ unsigned int lcd_crtc_size;
+ unsigned int lcd_crtc_dend;
+ unsigned int lcd_crtc_hr;
+ unsigned int lcd_crtc_hsync;
+ unsigned int lcd_crtc_vr;
+ unsigned int lcd_va_baddr0;
+ unsigned int lcd_va_baddr1;
+ unsigned int lcd_va_fbctrl;
+ unsigned int lcd_va_scale;
+ unsigned int lcd_va_test;
+ unsigned int lcd_va_win;
+ unsigned int lcd_va_stuff;
+};
+
+/* LCD Display Description */
+struct nuc900fb_display {
+ /* LCD Image type */
+ unsigned type;
+
+ /* LCD Screen Size */
+ unsigned short width;
+ unsigned short height;
+
+ /* LCD Screen Info */
+ unsigned short xres;
+ unsigned short yres;
+ unsigned short bpp;
+
+ unsigned long pixclock;
+ unsigned short left_margin;
+ unsigned short right_margin;
+ unsigned short hsync_len;
+ unsigned short upper_margin;
+ unsigned short lower_margin;
+ unsigned short vsync_len;
+
+ /* hardware special register value */
+ unsigned int dccs;
+ unsigned int devctl;
+ unsigned int fbctrl;
+ unsigned int scale;
+};
+
+struct nuc900fb_mach_info {
+ struct nuc900fb_display *displays;
+ unsigned num_displays;
+ unsigned default_display;
+ /* GPIO Setting Info */
+ unsigned gpio_dir;
+ unsigned gpio_dir_mask;
+ unsigned gpio_data;
+ unsigned gpio_data_mask;
+};
+
+extern void __init nuc900_fb_set_platdata(struct nuc900fb_mach_info *);
+
+#endif /* __ASM_ARM_FB_H */
diff --git a/arch/arm/mach-w90x900/include/mach/regs-ldm.h
b/arch/arm/mach-w90x900/include/mach/regs-ldm.h
new file mode 100644
index 0000000..e9d480a
--- /dev/null
+++ b/arch/arm/mach-w90x900/include/mach/regs-ldm.h
@@ -0,0 +1,253 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/regs-serial.h
+ *
+ * Copyright (c) 2009 Nuvoton technology corporation
+ * 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 as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Description:
+ * Nuvoton Display, LCM Register list
+ * Author: Wang Qiang (ruralit...@gmail.com) 2009/12/11
+ *
+ */
+
+
+#ifndef __ASM_ARM_W90X900_REGS_LDM_H
+#define __ASM_ARM_W90X900_REGS_LDM_H
+
+#include <mach/map.h>
+
+/* Display Controller Control/Status Register */
+#define REG_LCM_DCCS (0x00)
+
+#define LCM_DCCS_ENG_RST (1 << 0)
+#define LCM_DCCS_VA_EN (1 << 1)
+#define LCM_DCCS_OSD_EN (1 << 2)
+#define LCM_DCCS_DISP_OUT_EN (1 << 3)
+#define LCM_DCCS_DISP_INT_EN (1 << 4)
+#define LCM_DCCS_CMD_ON (1 << 5)
+#define LCM_DCCS_FIELD_INTR (1 << 6)
+#define LCM_DCCS_SINGLE (1 << 7)
+
+enum LCM_DCCS_VA_SRC {
+ LCM_DCCS_VA_SRC_YUV422 = (0 << 8),
+ LCM_DCCS_VA_SRC_YCBCR422 = (1 << 8),
+ LCM_DCCS_VA_SRC_RGB888 = (2 << 8),
+ LCM_DCCS_VA_SRC_RGB666 = (3 << 8),
+ LCM_DCCS_VA_SRC_RGB565 = (4 << 8),
+ LCM_DCCS_VA_SRC_RGB444LOW = (5 << 8),
+ LCM_DCCS_VA_SRC_RGB444HIGH = (7 << 8)
+};
+
+
+/* Display Device Control Register */
+#define REG_LCM_DEV_CTRL (0x04)
+
+enum LCM_DEV_CTRL_SWAP_YCbCr {
+ LCM_DEV_CTRL_SWAP_UYVY = (0 << 1),
+ LCM_DEV_CTRL_SWAP_YUYV = (1 << 1),
+ LCM_DEV_CTRL_SWAP_VYUY = (2 << 1),
+ LCM_DEV_CTRL_SWAP_YVYU = (3 << 1)
+};
+
+enum LCM_DEV_CTRL_RGB_SHIFT {
+ LCM_DEV_CTRL_RGB_SHIFT_NOT = (0 << 3),
+ LCM_DEV_CTRL_RGB_SHIFT_ONECYCLE = (1 << 3),
+ LCM_DEV_CTRL_RGB_SHIFT_TWOCYCLE = (2 << 3),
+ LCM_DEV_CTRL_RGB_SHIFT_NOT_DEF = (3 << 3)
+};
+
+enum LCM_DEV_CTRL_DEVICE {
+ LCM_DEV_CTRL_DEVICE_YUV422 = (0 << 5),
+ LCM_DEV_CTRL_DEVICE_YUV444 = (1 << 5),
+ LCM_DEV_CTRL_DEVICE_UNIPAC = (4 << 5),
+ LCM_DEV_CTRL_DEVICE_SEIKO_EPSON = (5 << 5),
+ LCM_DEV_CTRL_DEVICE_HIGH_COLOR = (6 << 5),
+ LCM_DEV_CTRL_DEVICE_MPU = (7 << 5)
+};
+
+#define LCM_DEV_CTRL_LCD_DDA (8)
+#define LCM_DEV_CTRL_YUV2CCIR (16)
+
+enum LCM_DEV_CTRL_LCD_SEL {
+ LCM_DEV_CTRL_LCD_SEL_RGB_GBR = (0 << 17),
+ LCM_DEV_CTRL_LCD_SEL_BGR_RBG = (1 << 17),
+ LCM_DEV_CTRL_LCD_SEL_GBR_RGB = (2 << 17),
+ LCM_DEV_CTRL_LCD_SEL_RBG_BGR = (3 << 17)
+};
+
+enum LCM_DEV_CTRL_FAL_D {
+ LCM_DEV_CTRL_FAL_D_FALLING = (0 << 19),
+ LCM_DEV_CTRL_FAL_D_RISING = (1 << 19),
+};
+
+enum LCM_DEV_CTRL_H_POL {
+ LCM_DEV_CTRL_H_POL_LOW = (0 << 20),
+ LCM_DEV_CTRL_H_POL_HIGH = (1 << 20),
+};
+
+enum LCM_DEV_CTRL_V_POL {
+ LCM_DEV_CTRL_V_POL_LOW = (0 << 21),
+ LCM_DEV_CTRL_V_POL_HIGH = (1 << 21),
+};
+
+enum LCM_DEV_CTRL_VR_LACE {
+ LCM_DEV_CTRL_VR_LACE_NINTERLACE = (0 << 22),
+ LCM_DEV_CTRL_VR_LACE_INTERLACE = (1 << 22),
+};
+
+enum LCM_DEV_CTRL_LACE {
+ LCM_DEV_CTRL_LACE_NINTERLACE = (0 << 23),
+ LCM_DEV_CTRL_LACE_INTERLACE = (1 << 23),
+};
+
+enum LCM_DEV_CTRL_RGB_SCALE {
+ LCM_DEV_CTRL_RGB_SCALE_4096 = (0 << 24),
+ LCM_DEV_CTRL_RGB_SCALE_65536 = (1 << 24),
+ LCM_DEV_CTRL_RGB_SCALE_262144 = (2 << 24),
+ LCM_DEV_CTRL_RGB_SCALE_16777216 = (3 << 24),
+};
+
+enum LCM_DEV_CTRL_DBWORD {
+ LCM_DEV_CTRL_DBWORD_HALFWORD = (0 << 26),
+ LCM_DEV_CTRL_DBWORD_FULLWORD = (1 << 26),
+};
+
+enum LCM_DEV_CTRL_MPU68 {
+ LCM_DEV_CTRL_MPU68_80_SERIES = (0 << 27),
+ LCM_DEV_CTRL_MPU68_68_SERIES = (1 << 27),
+};
+
+enum LCM_DEV_CTRL_DE_POL {
+ LCM_DEV_CTRL_DE_POL_HIGH = (0 << 28),
+ LCM_DEV_CTRL_DE_POL_LOW = (1 << 28),
+};
+
+#define LCM_DEV_CTRL_CMD16 (29)
+#define LCM_DEV_CTRL_CM16t18 (30)
+#define LCM_DEV_CTRL_CMD_LOW (31)
+
+/* MPU-Interface LCD Write Command */
+#define REG_LCM_MPU_CMD (0x08)
+
+/* Interrupt Control/Status Register */
+#define REG_LCM_INT_CS (0x0c)
+#define LCM_INT_CS_DISP_F_EN (1 << 0)
+#define LCM_INT_CS_UNDERRUN_EN (1 << 1)
+#define LCM_INT_CS_BUS_ERROR_INT (1 << 28)
+#define LCM_INT_CS_UNDERRUN_INT (1 << 29)
+#define LCM_INT_CS_DISP_F_STATUS (1 << 30)
+#define LCM_INT_CS_DISP_F_INT (1 << 31)
+
+/* CRTC Display Size Control Register */
+#define REG_LCM_CRTC_SIZE (0x10)
+#define LCM_CRTC_SIZE_VTTVAL(x) ((x) << 16)
+#define LCM_CRTC_SIZE_HTTVAL(x) ((x) << 0)
+
+/* CRTC Display Enable End */
+#define REG_LCM_CRTC_DEND (0x14)
+#define LCM_CRTC_DEND_VDENDVAL(x) ((x) << 16)
+#define LCM_CRTC_DEND_HDENDVAL(x) ((x) << 0)
+
+/* CRTC Internal Horizontal Retrace Control Register */
+#define REG_LCM_CRTC_HR (0x18)
+#define LCM_CRTC_HR_EVAL(x) ((x) << 16)
+#define LCM_CRTC_HR_SVAL(x) ((x) << 0)
+
+/* CRTC Horizontal Sync Control Register */
+#define REG_LCM_CRTC_HSYNC (0x1C)
+#define LCM_CRTC_HSYNC_SHIFTVAL(x) ((x) << 30)
+#define LCM_CRTC_HSYNC_EVAL(x) ((x) << 16)
+#define LCM_CRTC_HSYNC_SVAL(x) ((x) << 0)
+
+/* CRTC Internal Vertical Retrace Control Register */
+#define REG_LCM_CRTC_VR (0x20)
+#define LCM_CRTC_VR_EVAL(x) ((x) << 16)
+#define LCM_CRTC_VR_SVAL(x) ((x) << 0)
+
+/* Video Stream Frame Buffer-0 Starting Address */
+#define REG_LCM_VA_BADDR0 (0x24)
+
+/* Video Stream Frame Buffer-1 Starting Address */
+#define REG_LCM_VA_BADDR1 (0x28)
+
+/* Video Stream Frame Buffer Control Register */
+#define REG_LCM_VA_FBCTRL (0x2C)
+#define LCM_VA_FBCTRL_IO_REGION_HALF (1 << 28)
+#define LCM_VA_FBCTRL_FIELD_DUAL (1 << 29)
+#define LCM_VA_FBCTRL_START_BUF (1 << 30)
+#define LCM_VA_FBCTRL_DB_EN (1 << 31)
+
+/* Video Stream Scaling Control Register */
+#define REG_LCM_VA_SCALE (0x30)
+#define LCM_VA_SCALE_XCOPY_INTERPOLATION (0 << 15)
+#define LCM_VA_SCALE_XCOPY_DUPLICATION (1 << 15)
+
+/* Image Stream Active Window Coordinates */
+#define REG_LCM_VA_WIN (0x38)
+
+/* Image Stream Stuff Pixel */
+#define REG_LCM_VA_STUFF (0x3C)
+
+/* OSD Window Starting Coordinates */
+#define REG_LCM_OSD_WINS (0x40)
+
+/* OSD Window Ending Coordinates */
+#define REG_LCM_OSD_WINE (0x44)
+
+/* OSD Stream Frame Buffer Starting Address */
+#define REG_LCM_OSD_BADDR (0x48)
+
+/* OSD Stream Frame Buffer Control Register */
+#define REG_LCM_OSD_FBCTRL (0x4c)
+
+/* OSD Overlay Control Register */
+#define REG_LCM_OSD_OVERLAY (0x50)
+
+/* OSD Overlay Color-Key Pattern Register */
+#define REG_LCM_OSD_CKEY (0x54)
+
+/* OSD Overlay Color-Key Mask Register */
+#define REG_LCM_OSD_CMASK (0x58)
+
+/* OSD Window Skip1 Register */
+#define REG_LCM_OSD_SKIP1 (0x5C)
+
+/* OSD Window Skip2 Register */
+#define REG_LCM_OSD_SKIP2 (0x60)
+
+/* OSD horizontal up scaling control register */
+#define REG_LCM_OSD_SCALE (0x64)
+
+/* MPU Vsync control register */
+#define REG_LCM_MPU_VSYNC (0x68)
+
+/* Hardware cursor control Register */
+#define REG_LCM_HC_CTRL (0x6C)
+
+/* Hardware cursot tip point potison on va picture */
+#define REG_LCM_HC_POS (0x70)
+
+/* Hardware Cursor Window Buffer Control Register */
+#define REG_LCM_HC_WBCTRL (0x74)
+
+/* Hardware cursor memory base address register */
+#define REG_LCM_HC_BADDR (0x78)
+
+/* Hardware cursor color ram register mapped to bpp = 0 */
+#define REG_LCM_HC_COLOR0 (0x7C)
+
+/* Hardware cursor color ram register mapped to bpp = 1 */
+#define REG_LCM_HC_COLOR1 (0x80)
+
+/* Hardware cursor color ram register mapped to bpp = 2 */
+#define REG_LCM_HC_COLOR2 (0x84)
+
+/* Hardware cursor color ram register mapped to bpp = 3 */
+#define REG_LCM_HC_COLOR3 (0x88)
+
+#endif /* __ASM_ARM_W90X900_REGS_LDM_H */
diff --git a/arch/arm/mach-w90x900/mach-nuc950evb.c
b/arch/arm/mach-w90x900/mach-nuc950evb.c
index cef903b..b3edc3c 100644
--- a/arch/arm/mach-w90x900/mach-nuc950evb.c
+++ b/arch/arm/mach-w90x900/mach-nuc950evb.c
@@ -10,6 +10,8 @@
* 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;version 2 of the License.
+ * history:
+ * Wang Qiang (ruralit...@gmail.com) add LCD support
*
*/
@@ -18,9 +20,51 @@
#include <asm/mach/map.h>
#include <asm/mach-types.h>
#include <mach/map.h>
+#include <mach/regs-ldm.h>
+#include <mach/fb.h>
#include "nuc950.h"
+#ifdef CONFIG_FB_NUC900
+/* LCD Controller */
+static struct nuc900fb_display __initdata nuc950_lcd_info[] = {
+ /* Giantplus Technology GPM1040A0 320x240 Color TFT LCD */
+ [0] = {
+ .type = LCM_DCCS_VA_SRC_RGB565,
+ .width = 320,
+ .height = 240,
+ .xres = 320,
+ .yres = 240,
+ .bpp = 16,
+ .pixclock = 200000,
+ .left_margin = 34,
+ .right_margin = 54,
+ .hsync_len = 10,
+ .upper_margin = 18,
+ .lower_margin = 4,
+ .vsync_len = 1,
+ .dccs = 0x8e00041a,
+ .devctl = 0x060800c0,
+ .fbctrl = 0x00a000a0,
+ .scale = 0x04000400,
+ },
+};
+
+static struct nuc900fb_mach_info nuc950_fb_info __initdata = {
+#if defined(CONFIG_GPM1040A0_320X240)
+ .displays = &nuc950_lcd_info[0],
+#else
+ .displays = nuc950_lcd_info,
+#endif
+ .num_displays = ARRAY_SIZE(nuc950_lcd_info),
+ .default_display = 0,
+ .gpio_dir = 0x00000004,
+ .gpio_dir_mask = 0xFFFFFFFD,
+ .gpio_data = 0x00000004,
+ .gpio_data_mask = 0xFFFFFFFD,
+};
+#endif
+
static void __init nuc950evb_map_io(void)
{
nuc950_map_io();
@@ -30,6 +74,9 @@ static void __init nuc950evb_map_io(void)
static void __init nuc950evb_init(void)
{
nuc950_board_init();
+#ifdef CONFIG_FB_NUC900
+ nuc900_fb_set_platdata(&nuc950_fb_info);
+#endif
}
MACHINE_START(W90P950EVB, "W90P950EVB")
diff --git a/arch/arm/mach-w90x900/nuc950.c b/arch/arm/mach-w90x900/nuc950.c
index 1495081..4d1f1ab 100644
--- a/arch/arm/mach-w90x900/nuc950.c
+++ b/arch/arm/mach-w90x900/nuc950.c
@@ -18,6 +18,7 @@
#include <linux/platform_device.h>
#include <asm/mach/map.h>
#include <mach/hardware.h>
+
#include "cpu.h"
/* define specific CPU platform device */
@@ -25,6 +26,9 @@
static struct platform_device *nuc950_dev[] __initdata = {
&nuc900_device_kpi,
&nuc900_device_fmi,
+#ifdef CONFIG_FB_NUC900
+ &nuc900_device_lcd,
+#endif
};
/* define specific CPU platform io map */
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 5a5c303..a943e5e 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -1945,6 +1945,27 @@ config FB_S3C2410_DEBUG
Turn on debugging messages. Note that you can set/unset at run time
through sysfs
+config FB_NUC900
+ bool "NUC900 LCD framebuffer support"
+ depends on FB && ARCH_W90X900
+ select FB_CFB_FILLRECT
+ select FB_CFB_COPYAREA
+ select FB_CFB_IMAGEBLIT
+ ---help---
+ Frame buffer driver for the built-in LCD controller in the Nuvoton
+ NUC900 processor
+
+config GPM1040A0_320X240
+ bool "Giantplus Technology GPM1040A0 320x240 Color TFT LCD"
+ depends on FB_NUC900
+
+config FB_NUC900_DEBUG
+ bool "NUC900 lcd debug messages"
+ depends on FB_NUC900
+ help
+ Turn on debugging messages. Note that you can set/unset at run time
+ through sysfs
+
config FB_SM501
tristate "Silicon Motion SM501 framebuffer support"
depends on FB && MFD_SM501
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 4ecb30c..a42ad55 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -129,6 +129,7 @@ obj-$(CONFIG_XEN_FBDEV_FRONTEND) += xen-fbfront.o
obj-$(CONFIG_FB_CARMINE) += carminefb.o
obj-$(CONFIG_FB_MB862XX) += mb862xx/
obj-$(CONFIG_FB_MSM) += msm/
+obj-$(CONFIG_FB_NUC900) += nuc900fb.o
# Platform or fallback drivers go here
obj-$(CONFIG_FB_UVESA) += uvesafb.o
diff --git a/drivers/video/nuc900fb.c b/drivers/video/nuc900fb.c
new file mode 100644
index 0000000..c4ff225
--- /dev/null
+++ b/drivers/video/nuc900fb.c
@@ -0,0 +1,842 @@
+/*
+ *
+ * Copyright (c) 2009 Nuvoton technology corporation
+ * 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 as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Description:
+ * Nuvoton LCD Controller Driver
+ * Author:
+ * Wang Qiang (ruralit...@gmail.com) 2009/12/11
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/wait.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/cpufreq.h>
+#include <linux/io.h>
+
+#ifdef CONFIG_PM
+#include <linux/pm.h>
+#endif
+
+#include <mach/map.h>
+#include <mach/regs-clock.h>
+#include <mach/regs-ldm.h>
+#include <mach/fb.h>
+#include <mach/clkdev.h>
+
+#include "nuc900fb.h"
+
+/* Debugging stuff */
+#ifdef CONFIG_FB_NUC900_DEBUG
+static int debug = 1;
+#define dprintk(msg...) { printk(KERN_DEBUG "nuc900 lcd: " msg); }
+#else
+static int debug;
+#define dprintk(msg...)
+#endif
+
+
+/*
+ * Initialize the nuc900 video (dual) buffer address
+ */
+static void nuc900fb_set_lcdaddr(struct fb_info *info)
+{
+ struct nuc900fb_info *fbi = info->par;
+ void __iomem *regs = fbi->io;
+ unsigned long vbaddr1, vbaddr2;
+ vbaddr1 = info->fix.smem_start;
+ vbaddr2 = info->fix.smem_start;
+ vbaddr2 += info->fix.line_length * info->var.yres;
+ /*set frambuffer start phy addr*/
+ writel(vbaddr1, regs + REG_LCM_VA_BADDR0);
+ writel(vbaddr2, regs + REG_LCM_VA_BADDR1);
+
+ writel(fbi->regs.lcd_va_fbctrl, regs + REG_LCM_VA_FBCTRL);
+ writel(fbi->regs.lcd_va_scale, regs + REG_LCM_VA_SCALE);
+}
+
+//static void nuc900fb_clk_select(struct fb_info *info, unsigned long pixclk)
+//{
+// struct nuc900fb_info *fbi = info->par;
+// int div;
+// if (clk <= 15 * 1000 * 1000) {
+// div = (15 * 1000 * 1000)/
+// nuc900_driver_clksrc_div(fbi->dev, "ext", 0x2);
+// }
+//
+//}
+
+/*
+ * calculate divider for lcd div
+ */
+static unsigned int nuc900fb_calc_pixclk(struct nuc900fb_info *fbi,
+ unsigned long pixclk)
+{
+ unsigned long clk = fbi->clk_rate;
+ unsigned long long div;
+
+ /* pixclk is in picseconds. our clock is in Hz*/
+ /* div = (clk * pixclk)/10^12 */
+ div = (unsigned long long)clk * pixclk;
+ div >>= 12;
+ do_div(div, 625 * 625UL * 625);
+
+ dprintk("pixclk %ld, divisor is %ld\n", pixclk, (long)div);
+
+ return div;
+}
+
+/*
+ * Check the video params of 'var'.
+ */
+static int nuc900fb_check_var(struct fb_var_screeninfo *var,
+ struct fb_info *info)
+{
+ struct nuc900fb_info *fbi = info->par;
+ struct nuc900fb_mach_info *mach_info = fbi->dev->platform_data;
+ struct nuc900fb_display *display = NULL;
+ struct nuc900fb_display *default_display = mach_info->displays +
+ mach_info->default_display;
+ int i;
+
+ dprintk("check_var(var=%p, info=%p)\n", var, info);
+
+ /* validate x/y resolution */
+ /* choose default mode if possible */
+ if (var->xres == default_display->xres &&
+ var->yres == default_display->yres &&
+ var->bits_per_pixel == default_display->bpp)
+ display = default_display;
+ else
+ for (i = 0; i < mach_info->num_displays; i++)
+ if (var->xres == mach_info->displays[i].xres &&
+ var->yres == mach_info->displays[i].yres &&
+ var->bits_per_pixel == mach_info->displays[i].bpp) {
+ display = mach_info->displays + i;
+ break;
+ }
+
+ if (display == NULL) {
+ dprintk("wrong resolution or depth %dx%d at %d bit per pixel\n",
+ var->xres, var->yres, var->bits_per_pixel);
+ return -EINVAL;
+ }
+
+ /* it should be the same size as the display */
+ var->xres_virtual = display->xres;
+ var->yres_virtual = display->yres;
+ var->height = display->height;
+ var->width = display->width;
+
+ /* copy lcd settings */
+ var->pixclock = display->pixclock;
+ var->left_margin = display->left_margin;
+ var->right_margin = display->right_margin;
+ var->upper_margin = display->upper_margin;
+ var->lower_margin = display->lower_margin;
+ var->vsync_len = display->vsync_len;
+ var->hsync_len = display->hsync_len;
+
+ var->transp.offset = 0;
+ var->transp.length = 0;
+
+ fbi->regs.lcd_dccs = display->dccs;
+ fbi->regs.lcd_device_ctrl = display->devctl;
+ fbi->regs.lcd_va_fbctrl = display->fbctrl;
+ fbi->regs.lcd_va_scale = display->scale;
+
+ /* set R/G/B possions */
+ switch (var->bits_per_pixel) {
+ case 1:
+ case 2:
+ case 4:
+ case 8:
+ default:
+ var->red.offset = 0;
+ var->red.length = var->bits_per_pixel;
+ var->green = var->red;
+ var->blue = var->red;
+ break;
+ case 12:
+ var->red.length = 4;
+ var->green.length = 4;
+ var->blue.length = 4;
+ var->red.offset = 8;
+ var->green.offset = 4;
+ var->blue.offset = 0;
+ break;
+ case 16:
+ var->red.length = 5;
+ var->green.length = 6;
+ var->blue.length = 5;
+ var->red.offset = 11;
+ var->green.offset = 5;
+ var->blue.offset = 0;
+ break;
+ case 18:
+ var->red.length = 6;
+ var->green.length = 6;
+ var->blue.length = 6;
+ var->red.offset = 12;
+ var->green.offset = 6;
+ var->blue.offset = 0;
+ break;
+ case 32:
+ var->red.length = 8;
+ var->green.length = 8;
+ var->blue.length = 8;
+ var->red.offset = 16;
+ var->green.offset = 8;
+ var->blue.offset = 0;
+ break;
+ }
+
+ return 0;
+}
+
+/*
+ * Calculate lcd register values from var setting & save into hw
+ */
+static void nuc900fb_calculate_lcd_regs(const struct fb_info *info,
+ struct nuc900fb_hw *regs)
+{
+ const struct fb_var_screeninfo *var = &info->var;
+ int vtt = var->height + var->upper_margin + var->lower_margin;
+ int htt = var->width + var->left_margin + var->right_margin;
+ int hsync = var->width + var->right_margin;
+ int vsync = var->height + var->lower_margin;
+ regs->lcd_crtc_size = LCM_CRTC_SIZE_VTTVAL(vtt) |
+ LCM_CRTC_SIZE_HTTVAL(htt);
+ regs->lcd_crtc_dend = LCM_CRTC_DEND_VDENDVAL(var->height) |
+ LCM_CRTC_DEND_HDENDVAL(var->width);
+ regs->lcd_crtc_hr = LCM_CRTC_HR_EVAL(var->width + 5) |
+ LCM_CRTC_HR_SVAL(var->width + 1);
+ regs->lcd_crtc_hsync = LCM_CRTC_HSYNC_EVAL(hsync + var->hsync_len) |
+ LCM_CRTC_HSYNC_SVAL(hsync);
+ regs->lcd_crtc_vr = LCM_CRTC_VR_EVAL(vsync + var->vsync_len) |
+ LCM_CRTC_VR_SVAL(vsync);
+
+}
+
+/*
+ * Activate (set) the controller from the given framebuffer
+ * information
+ */
+static void nuc900fb_activate_var(struct fb_info *info)
+{
+ struct nuc900fb_info *fbi = info->par;
+ void __iomem *regs = fbi->io;
+ struct fb_var_screeninfo *var = &info->var;
+ int clkdiv;
+
+ clkdiv = nuc900fb_calc_pixclk(fbi, var->pixclock) - 1;
+ if (clkdiv < 0)
+ clkdiv = 0;
+
+ nuc900fb_calculate_lcd_regs(info, &fbi->regs);
+
+ /* set the new lcd registers*/
+
+ dprintk("new lcd register set:\n");
+ dprintk("dccs = 0x%08x\n", fbi->regs.lcd_dccs);
+ dprintk("dev_ctl = 0x%08x\n", fbi->regs.lcd_device_ctrl);
+ dprintk("crtc_size = 0x%08x\n", fbi->regs.lcd_crtc_size);
+ dprintk("crtc_dend = 0x%08x\n", fbi->regs.lcd_crtc_dend);
+ dprintk("crtc_hr = 0x%08x\n", fbi->regs.lcd_crtc_hr);
+ dprintk("crtc_hsync = 0x%08x\n", fbi->regs.lcd_crtc_hsync);
+ dprintk("crtc_vr = 0x%08x\n", fbi->regs.lcd_crtc_vr);
+
+ writel(fbi->regs.lcd_device_ctrl, regs + REG_LCM_DEV_CTRL);
+ writel(fbi->regs.lcd_crtc_size, regs + REG_LCM_CRTC_SIZE);
+ writel(fbi->regs.lcd_crtc_dend, regs + REG_LCM_CRTC_DEND);
+ writel(fbi->regs.lcd_crtc_hr, regs + REG_LCM_CRTC_HR);
+ writel(fbi->regs.lcd_crtc_hsync, regs + REG_LCM_CRTC_HSYNC);
+ writel(fbi->regs.lcd_crtc_vr, regs + REG_LCM_CRTC_VR);
+
+ /* set lcd address pointers */
+ nuc900fb_set_lcdaddr(info);
+
+ writel(fbi->regs.lcd_dccs, regs + REG_LCM_DCCS);
+}
+
+/*
+ * Alters the hardware state.
+ *
+ */
+static int nuc900fb_set_par(struct fb_info *info)
+{
+ struct fb_var_screeninfo *var = &info->var;
+
+ dprintk("nuc900fb_set_par\n");
+
+ switch (var->bits_per_pixel) {
+ case 32:
+ case 24:
+ case 18:
+ case 16:
+ case 12:
+ info->fix.visual = FB_VISUAL_TRUECOLOR;
+ break;
+ case 1:
+ info->fix.visual = FB_VISUAL_MONO01;
+ break;
+ default:
+ info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+ break;
+ }
+
+ info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8;
+
+ /* activate this new configuration */
+ nuc900fb_activate_var(info);
+ return 0;
+}
+
+static inline unsigned int chan_to_field(unsigned int chan,
+ struct fb_bitfield *bf)
+{
+ chan &= 0xffff;
+ chan >>= 16 - bf->length;
+ return chan << bf->offset;
+}
+
+static int nuc900fb_setcolreg(unsigned regno,
+ unsigned red, unsigned green, unsigned blue,
+ unsigned transp, struct fb_info *info)
+{
+ unsigned int val;
+
+ switch (info->fix.visual) {
+ case FB_VISUAL_TRUECOLOR:
+ /* true-colour, use pseuo-palette */
+ if (regno < 16) {
+ u32 *pal = info->pseudo_palette;
+
+ val = chan_to_field(red, &info->var.red);
+ val |= chan_to_field(green, &info->var.green);
+ val |= chan_to_field(blue, &info->var.blue);
+ pal[regno] = val;
+ }
+ break;
+
+ default:
+ return 1; /* unknown type */
+ }
+ return 0;
+}
+
+/**
+ * nuc900fb_blank
+ *
+ */
+static int nuc900fb_blank(int blank_mode, struct fb_info *info)
+{
+
+ return 0;
+}
+
+static int nuc900fb_debug_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%s\n", debug ? "on" : "off");
+}
+
+static int nuc900fb_debug_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ if (len < 1)
+ return -EINVAL;
+
+ if (strnicmp(buf, "on", 2) == 0 ||
+ strnicmp(buf, "1", 1) == 0) {
+ debug = 1;
+ } else if (strnicmp(buf, "off", 3) == 0 ||
+ strnicmp(buf, "0", 1) == 0) {
+ debug = 0;
+
+ } else {
+ return -EINVAL;
+ }
+
+ return len;
+}
+
+static DEVICE_ATTR(debug, 0666, nuc900fb_debug_show, nuc900fb_debug_store);
+
+static struct fb_ops nuc900fb_ops = {
+ .owner = THIS_MODULE,
+ .fb_check_var = nuc900fb_check_var,
+ .fb_set_par = nuc900fb_set_par,
+ .fb_blank = nuc900fb_blank,
+ .fb_setcolreg = nuc900fb_setcolreg,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+};
+
+
+static inline void modify_gpio(void __iomem *reg,
+ unsigned long set, unsigned long mask)
+{
+ unsigned long tmp;
+ tmp = readl(reg) & ~mask;
+ writel(tmp | set, reg);
+}
+
+/*
+ * Initialise LCD-related registers
+ */
+static int nuc900fb_init_registers(struct fb_info *info)
+{
+ struct nuc900fb_info *fbi = info->par;
+ struct nuc900fb_mach_info *mach_info = fbi->dev->platform_data;
+ void __iomem *regs = fbi->io;
+
+ /*reset the display engine*/
+ writel(0, regs + REG_LCM_DCCS);
+ writel(readl(regs + REG_LCM_DCCS) | LCM_DCCS_ENG_RST,
+ regs + REG_LCM_DCCS);
+ ndelay(100);
+ writel(readl(regs + REG_LCM_DCCS) & (~LCM_DCCS_ENG_RST),
+ regs + REG_LCM_DCCS);
+ ndelay(100);
+
+ writel(0, regs + REG_LCM_DEV_CTRL);
+
+ /* config gpio output */
+ modify_gpio(W90X900_VA_GPIO + 0x54, mach_info->gpio_dir,
+ mach_info->gpio_dir_mask);
+ modify_gpio(W90X900_VA_GPIO + 0x58, mach_info->gpio_data,
+ mach_info->gpio_data_mask);
+
+ return 0;
+}
+
+
+/*
+ * Alloc the SDRAM region of NUC900 for the frame buffer.
+ * The buffer should be a non-cached, non-buffered, memory region
+ * to allow palette and pixel writes without flushing the cache.
+ */
+static int __init nuc900fb_map_video_memory(struct fb_info *info)
+{
+ struct nuc900fb_info *fbi = info->par;
+ dma_addr_t map_dma;
+ unsigned long map_size = PAGE_ALIGN(info->fix.smem_len);
+
+ dprintk("nuc900fb_map_video_memory(fbi=%p) map_size %lu\n",
+ fbi, map_size);
+
+ info->screen_base = dma_alloc_writecombine(fbi->dev, map_size,
+ &map_dma, GFP_KERNEL);
+
+ if (info->screen_base != NULL) {
+ dprintk("nuc900fb_map_video_memory: clear %p:%08lx\n",
+ info->screen_base, map_size);
+ memset(info->screen_base, 0x00, map_size);
+
+ info->fix.smem_start = map_dma;
+ dprintk("nuc900fb_map_video_memory: "
+ "dma=%08lx cpu=%p size=%08lx\n",
+ info->fix.smem_start, info->screen_base, map_size);
+ }
+ return (info->screen_base) ? 0 : -ENOMEM;
+}
+
+static inline void nuc900fb_unmap_video_memory(struct fb_info *info)
+{
+ struct nuc900fb_info *fbi = info->par;
+ dma_free_writecombine(fbi->dev, PAGE_ALIGN(info->fix.smem_len),
+ info->screen_base, info->fix.smem_start);
+}
+
+static irqreturn_t nuc900fb_irqhandler(int irq, void *dev_id)
+{
+ struct nuc900fb_info *fbi = dev_id;
+ void __iomem *regs = fbi->io;
+ void __iomem *irq_base = fbi->irq_base;
+ unsigned long lcdirq = readl(regs + REG_LCM_INT_CS);
+
+ if (lcdirq & LCM_INT_CS_DISP_F_STATUS) {
+ writel(readl(irq_base) | 1<<30, irq_base);
+
+ /* wait VA_EN low */
+ if ((readl(regs + REG_LCM_DCCS) &
+ LCM_DCCS_SINGLE) == LCM_DCCS_SINGLE)
+ while ((readl(regs + REG_LCM_DCCS) &
+ LCM_DCCS_VA_EN) == LCM_DCCS_VA_EN)
+ ;
+ /* display_out-enable */
+ writel(readl(regs + REG_LCM_DCCS) | LCM_DCCS_DISP_OUT_EN,
+ regs + REG_LCM_DCCS);
+ /* va-enable*/
+ writel(readl(regs + REG_LCM_DCCS) | LCM_DCCS_VA_EN,
+ regs + REG_LCM_DCCS);
+ } else if (lcdirq & LCM_INT_CS_UNDERRUN_INT) {
+ writel(readl(irq_base) | LCM_INT_CS_UNDERRUN_INT, irq_base);
+ } else if (lcdirq & LCM_INT_CS_BUS_ERROR_INT) {
+ writel(readl(irq_base) | LCM_INT_CS_BUS_ERROR_INT, irq_base);
+ }
+
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_CPU_FREQ
+
+static int nuc900fb_cpufreq_transition(struct notifier_block *nb,
+ unsigned long val, void *data)
+{
+ struct nuc900fb_info *info;
+ struct fb_info *fbinfo;
+ long delta_f;
+ info = container_of(nb, struct nuc900fb_info, freq_transition);
+ fbinfo = platform_get_drvdata(to_platform_device(info->dev));
+
+ delta_f = info->clk_rate - clk_get_rate(info->clk);
+
+ if ((val == CPUFREQ_POSTCHANGE && delta_f > 0) ||
+ (val == CPUFREQ_PRECHANGE && delta_f < 0)) {
+ info->clk_rate = clk_get_rate(info->clk);
+ nuc900fb_activate_var(fbinfo);
+ }
+
+ return 0;
+}
+
+static inline int nuc900fb_cpufreq_register(struct nuc900fb_info *fbi)
+{
+ fbi->freq_transition.notifier_call = nuc900fb_cpufreq_transition;
+ return cpufreq_register_notifier(&fbi->freq_transition,
+ CPUFREQ_TRANSITION_NOTIFIER);
+}
+
+static inline void nuc900fb_cpufreq_deregister(struct nuc900fb_info *fbi)
+{
+ cpufreq_unregister_notifier(&fbi->freq_transition,
+ CPUFREQ_TRANSITION_NOTIFIER);
+}
+#else
+static inline int nuc900fb_cpufreq_transition(struct notifier_block *nb,
+ unsigned long val, void *data)
+{
+ return 0;
+}
+
+static inline int nuc900fb_cpufreq_register(struct nuc900fb_info *fbi)
+{
+ return 0;
+}
+
+static inline void nuc900fb_cpufreq_deregister(struct nuc900fb_info *info)
+{
+}
+#endif
+
+static char driver_name[] = "nuc900fb";
+
+static int __init nuc900fb_probe(struct platform_device *pdev)
+{
+ struct nuc900fb_info *fbi;
+ struct nuc900fb_display *display;
+ struct fb_info *fbinfo;
+ struct nuc900fb_mach_info *mach_info;
+ struct resource *res;
+ int ret;
+ int irq;
+ int i;
+ int size;
+
+ dprintk("devinit\n");
+ mach_info = pdev->dev.platform_data;
+ if (mach_info == NULL) {
+ dev_err(&pdev->dev,
+ "no platform data for lcd, cannot attach\n");
+ return -EINVAL;
+ }
+
+ if (mach_info->default_display > mach_info->num_displays) {
+ dev_err(&pdev->dev,
+ "default display No. is %d but only %d displays \n",
+ mach_info->default_display, mach_info->num_displays);
+ return -EINVAL;
+ }
+
+
+ display = mach_info->displays + mach_info->default_display;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "no irq for device\n");
+ return -ENOENT;
+ }
+
+ fbinfo = framebuffer_alloc(sizeof(struct nuc900fb_info), &pdev->dev);
+ if (!fbinfo)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, fbinfo);
+
+ fbi = fbinfo->par;
+ fbi->dev = &pdev->dev;
+
+#ifdef CONFIG_CPU_NUC950
+ fbi->drv_type = LCDDRV_NUC950;
+#endif
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ size = (res->end - res->start) + 1;
+ fbi->mem = request_mem_region(res->start, size, pdev->name);
+ if (fbi->mem == NULL) {
+ dev_err(&pdev->dev, "failed to alloc memory region\n");
+ ret = -ENOENT;
+ goto free_fb;
+ }
+
+ fbi->io = ioremap(res->start, size);
+ if (fbi->io == NULL) {
+ dev_err(&pdev->dev, "ioremap() of lcd registers failed\n");
+ ret = -ENXIO;
+ goto release_mem_region;
+ }
+
+ fbi->irq_base = fbi->io + REG_LCM_INT_CS;
+
+
+ /* Stop the LCD */
+ writel(0, fbi->io + REG_LCM_DCCS);
+
+ /* fill the fbinfo*/
+ strcpy(fbinfo->fix.id, driver_name);
+ fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
+ fbinfo->fix.type_aux = 0;
+ fbinfo->fix.xpanstep = 0;
+ fbinfo->fix.ypanstep = 0;
+ fbinfo->fix.ywrapstep = 0;
+ fbinfo->fix.accel = FB_ACCEL_NONE;
+ fbinfo->var.nonstd = 0;
+ fbinfo->var.activate = FB_ACTIVATE_NOW;
+ fbinfo->var.accel_flags = 0;
+ fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
+ fbinfo->fbops = &nuc900fb_ops;
+ fbinfo->flags = FBINFO_FLAG_DEFAULT;
+ fbinfo->pseudo_palette = &fbi->pseudo_pal;
+
+ ret = request_irq(irq, nuc900fb_irqhandler, IRQF_DISABLED,
+ pdev->name, fbinfo);
+ if (ret) {
+ dev_err(&pdev->dev, "cannot register irq handler %d -err %d\n",
+ irq, ret);
+ ret = -EBUSY;
+ goto release_regs;
+ }
+
+ nuc900_driver_clksrc_div(&pdev->dev, "ext", 0x2);
+
+ fbi->clk = clk_get(&pdev->dev, NULL);
+ if (!fbi->clk || IS_ERR(fbi->clk)) {
+ printk(KERN_ERR "nuc900-lcd:failed to get lcd clock source\n");
+ ret = -ENOENT;
+ goto release_irq;
+ }
+
+ clk_enable(fbi->clk);
+ dprintk("got and enabled clock\n");
+
+ fbi->clk_rate = clk_get_rate(fbi->clk);
+
+ /* calutate the video buffer size */
+ for (i = 0; i < mach_info->num_displays; i++) {
+ unsigned long smem_len = mach_info->displays[i].xres;
+ smem_len *= mach_info->displays[i].yres;
+ smem_len *= mach_info->displays[i].bpp;
+ smem_len >>= 3;
+ if (fbinfo->fix.smem_len < smem_len)
+ fbinfo->fix.smem_len = smem_len;
+ }
+
+ /* Initialize Video Memory */
+ ret = nuc900fb_map_video_memory(fbinfo);
+ if (ret) {
+ printk(KERN_ERR "Failed to allocate video RAM: %x\n", ret);
+ goto release_clock;
+ }
+
+ dprintk("got video memory\n");
+
+ fbinfo->var.xres = display->xres;
+ fbinfo->var.yres = display->yres;
+ fbinfo->var.bits_per_pixel = display->bpp;
+
+ nuc900fb_init_registers(fbinfo);
+
+ nuc900fb_check_var(&fbinfo->var, fbinfo);
+
+ ret = nuc900fb_cpufreq_register(fbi);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to register cpufreq\n");
+ goto free_video_memory;
+ }
+
+ ret = register_framebuffer(fbinfo);
+ if (ret) {
+ printk(KERN_ERR "failed to register framebuffer device: %d\n",
+ ret);
+ goto free_cpufreq;
+ }
+
+ /* create device files */
+ ret = device_create_file(&pdev->dev, &dev_attr_debug);
+ if (ret)
+ printk(KERN_ERR "failed to add debug attribute\n");
+
+
+ printk(KERN_INFO "fb%d: %s frame buffer device\n",
+ fbinfo->node, fbinfo->fix.id);
+
+ return 0;
+
+free_cpufreq:
+ nuc900fb_cpufreq_deregister(fbi);
+free_video_memory:
+ nuc900fb_unmap_video_memory(fbinfo);
+release_clock:
+ clk_disable(fbi->clk);
+ clk_put(fbi->clk);
+release_irq:
+ free_irq(irq, fbi);
+release_regs:
+ iounmap(fbi->io);
+release_mem_region:
+ release_mem_region((unsigned long)fbi->mem, size);
+free_fb:
+ framebuffer_release(fbinfo);
+ return ret;
+}
+
+/*
+ * shutdown the lcd controller
+ */
+static void nuc900fb_stop_lcd(struct fb_info *info)
+{
+ struct nuc900fb_info *fbi = info->par;
+ void __iomem *regs = fbi->io;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ writel((~LCM_DCCS_DISP_INT_EN) | (~LCM_DCCS_VA_EN) | (~LCM_DCCS_OSD_EN),
+ regs + REG_LCM_DCCS);
+ local_irq_restore(flags);
+}
+
+/*
+ * Cleanup
+ */
+static int nuc900fb_remove(struct platform_device *pdev)
+{
+ struct fb_info *fbinfo = platform_get_drvdata(pdev);
+ struct nuc900fb_info *fbi = fbinfo->par;
+ int irq;
+
+ nuc900fb_stop_lcd(fbinfo);
+ msleep(1);
+
+ nuc900fb_unmap_video_memory(fbinfo);
+
+ iounmap(fbi->io);
+
+ irq = platform_get_irq(pdev, 0);
+ free_irq(irq, fbi);
+
+ release_resource(fbi->mem);
+ kfree(fbi->mem);
+
+ platform_set_drvdata(pdev, NULL);
+ framebuffer_release(fbinfo);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+
+/*
+ * suspend and resume support for the lcd controller
+ */
+
+static int nuc900fb_suspend(struct platform_device *dev, pm_message_t state)
+{
+ struct fb_info *fbinfo = platform_get_drvdata(dev);
+ struct nuc900fb_info *info = fbinfo->par;
+
+ nuc900fb_stop_lcd();
+ msleep(1);
+ clk_disable(info->clk);
+ return 0;
+}
+
+static int nuc900fb_resume(struct platform_device *dev)
+{
+ struct fb_info *fbinfo = platform_get_drvdata(dev);
+ struct nuc900fb_info *fbi = fbinfo->par;
+
+ dprintk("nuc900fb resume\n");
+
+ clk_enable(fbi->clk);
+ msleep(1);
+
+ nuc900fb_init_registers(fbinfo);
+ nuc900fb_activate_var(bfinfo);
+
+ return 0;
+}
+
+#else
+#define nuc900fb_suspend NULL
+#define nuc900fb_resume NULL
+#endif
+
+static struct platform_driver nuc900fb_driver = {
+ .probe = nuc900fb_probe,
+ .remove = nuc900fb_remove,
+ .suspend = nuc900fb_suspend,
+ .resume = nuc900fb_resume,
+ .driver = {
+ .name = "nuc900-lcd",
+ .owner = THIS_MODULE,
+ },
+};
+
+int __devinit nuc900fb_init(void)
+{
+ return platform_driver_register(&nuc900fb_driver);
+}
+
+static void __exit nuc900fb_cleanup(void)
+{
+ platform_driver_unregister(&nuc900fb_driver);
+}
+
+module_init(nuc900fb_init);
+module_exit(nuc900fb_cleanup);
+
+MODULE_DESCRIPTION("Framebuffer driver for the NUC900");
+MODULE_LICENSE("GPL");
diff --git a/drivers/video/nuc900fb.h b/drivers/video/nuc900fb.h
new file mode 100644
index 0000000..6c23aa3
--- /dev/null
+++ b/drivers/video/nuc900fb.h
@@ -0,0 +1,55 @@
+/*
+ *
+ * Copyright (c) 2009 Nuvoton technology corporation
+ * 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 as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Auther:
+ * Wang Qiang(ruralit...@gmail.com) 2009/12/16
+ */
+
+#ifndef __NUC900FB_H
+#define __NUC900FB_H
+
+#include <mach/map.h>
+#include <mach/fb.h>
+
+enum nuc900_lcddrv_type {
+ LCDDRV_NUC910,
+ LCDDRV_NUC930,
+ LCDDRV_NUC932,
+ LCDDRV_NUC950,
+ LCDDRV_NUC960,
+};
+
+
+#define PALETTE_BUFFER_SIZE 256
+#define PALETTE_BUFF_CLEAR (0x80000000) /* entry is clear/invalid */
+
+struct nuc900fb_info {
+ struct device *dev;
+ struct clk *clk;
+
+ struct resource *mem;
+ void __iomem *io;
+ void __iomem *irq_base;
+ int drv_type;
+ struct nuc900fb_hw regs;
+ unsigned long clk_rate;
+
+#ifdef CONFIG_CPU_FREQ
+ struct notifier_block freq_transition;
+#endif
+
+ /* keep these registers in case we need to re-write palette */
+ u32 palette_buffer[PALETTE_BUFFER_SIZE];
+ u32 pseudo_pal[16];
+};
+
+int nuc900fb_init(void);
+
+#endif /* __NUC900FB_H */
--
1.6.4
Wang Qiang
There is the patch of LCD controller driver for nuc900s.
The Linux LOGO is just fine and the FB-Test application was ok, too.
Wang Jinpu
please see comment inline.
2010/1/11 Qiang Wang <ruralit...@gmail.com>
> +/*
> + * calculate divider for lcd div
> + */
> +static unsigned int nuc900fb_calc_pixclk(struct nuc900fb_info *fbi,
> + unsigned long pixclk)
> +{
> + unsigned long clk = fbi->clk_rate;
> + unsigned long long div;
> +
> + /* pixclk is in picseconds. our clock is in Hz*/
> + /* div = (clk * pixclk)/10^12 */
> + div = (unsigned long long)clk * pixclk;
> + div >>= 12;
> + do_div(div, 625 * 625UL * 625);
> +
> + dprintk("pixclk %ld, divisor is %ld\n", pixclk, (long)div);
> +
> + return div;
> 欢迎加入"NUC900 Linux BSP开发社区".
> NUC900 Linux相关问题请发问题邮件至：
> NUC...@googlegroups.com
> 取消订阅请发邮件：
> NUC900+un...@googlegroups.com
> 新手请熟读社区首页：
> https://groups.google.com/group/NUC900?hl=zh-CN
>
Wang Qiang
Thank you for your comment.
please see comment below.
2010/1/12 Wang Jinpu <xjt...@gmail.com>:
The compiler will convert from 'long long' into 'unsigned int' implicitly.
I mean I use the compiler function and keep code simple.
Please refer the Charter 6 of C99-standard document .Something like below:
Several operators convert operand values from one type to another
automatically. This
subclause specifies the result required from such an implicit
conversion, as well as those
that result from a cast operation (an explicit conversion).
Qiang Wang
This patch is for nuc900 platform.
Please check and ack.
Thank you very much.
best regards
Wang Qiang
2010/1/11 Wang Qiang <ruralit...@gmail.com>:
Andrew Morton
Wang Qiang <ruralit...@gmail.com> wrote:
> hi, Dear Wan
>
> There is the patch of LCD controller driver for nuc900s.
> The Linux LOGO is just fine and the FB-Test application was ok, too.
>
> best regards
> wangqiang
>
>
> ...
>
> @@ -380,6 +381,48 @@ struct platform_device nuc900_device_kpi = {
> .resource = nuc900_kpi_resource,
> };
>
> +#ifdef CONFIG_FB_NUC900
> +
> +static struct resource nuc900_lcd_resource[] = {
> + [0] = {
> + .start = W90X900_PA_LCD,
> + .end = W90X900_PA_LCD + W90X900_SZ_LCD - 1,
> + .flags = IORESOURCE_MEM,
> + },
> + [1] = {
> + .start = IRQ_LCD,
> + .end = IRQ_LCD,
> + .flags = IORESOURCE_IRQ,
> + }
> +};
> +
> +static u64 nuc900_device_lcd_dmamask = 0xffffffffUL;
I suspect this should have type `dma_addr_t', but `struct device' uses
open-coded u64 too. Odd.
It makes no sense to initialise a u64 with an unsigned long value -
it's wrong on a 32-bit machine.
this:
static u64 nuc900_device_lcd_dmamask = -1;
will work.
> +struct platform_device nuc900_device_lcd = {
> + .name = "nuc900-lcd",
> + .id = -1,
> + .num_resources = ARRAY_SIZE(nuc900_lcd_resource),
> + .resource = nuc900_lcd_resource,
> + .dev = {
> + .dma_mask = &nuc900_device_lcd_dmamask,
> + .coherent_dma_mask = 0xffffffffUL
And this gets initialised to 0x00000000ffffffff also. Using -1 will fix.
> + }
> +};
> +
>
> ...
>
> + */
> +#include <linux/module.h>
> +#include <linux/kernel.h>
> +#include <linux/errno.h>
> +#include <linux/string.h>
> +#include <linux/mm.h>
> +#include <linux/tty.h>
> +#include <linux/slab.h>
> +#include <linux/delay.h>
> +#include <linux/fb.h>
> +#include <linux/init.h>
> +#include <linux/dma-mapping.h>
> +#include <linux/interrupt.h>
> +#include <linux/workqueue.h>
> +#include <linux/wait.h>
> +#include <linux/platform_device.h>
> +#include <linux/clk.h>
> +#include <linux/cpufreq.h>
> +#include <linux/io.h>
> +
> +#ifdef CONFIG_PM
Is this ifdef needed?
> +#include <linux/pm.h>
> +#endif
> +
> +#include <mach/map.h>
> +#include <mach/regs-clock.h>
> +#include <mach/regs-ldm.h>
> +#include <mach/fb.h>
> +#include <mach/clkdev.h>
> +
> +#include "nuc900fb.h"
> +
> +/* Debugging stuff */
> +#ifdef CONFIG_FB_NUC900_DEBUG
> +static int debug = 1;
> +#define dprintk(msg...) { printk(KERN_DEBUG "nuc900 lcd: " msg); }
> +#else
> +static int debug;
> +#define dprintk(msg...)
> +#endif
Would be better to use the standard pr_debug(), rather than inventing
private infrastructure. That way you get to enjoy the facilities which
lib/dynamic_debug.c offers.
> +
> +/*
> + * Initialize the nuc900 video (dual) buffer address
> + */
> +static void nuc900fb_set_lcdaddr(struct fb_info *info)
> +{
> + struct nuc900fb_info *fbi = info->par;
> + void __iomem *regs = fbi->io;
> + unsigned long vbaddr1, vbaddr2;
> + vbaddr1 = info->fix.smem_start;
It's conventional to put a blank line beterrn end-of-locals and start-of-code.
> + vbaddr2 = info->fix.smem_start;
> + vbaddr2 += info->fix.line_length * info->var.yres;
> + /*set frambuffer start phy addr*/
Like this:
/* set frambuffer start phy addr */
> + writel(vbaddr1, regs + REG_LCM_VA_BADDR0);
> + writel(vbaddr2, regs + REG_LCM_VA_BADDR1);
> +
> + writel(fbi->regs.lcd_va_fbctrl, regs + REG_LCM_VA_FBCTRL);
> + writel(fbi->regs.lcd_va_scale, regs + REG_LCM_VA_SCALE);
> +}
> +
> +//static void nuc900fb_clk_select(struct fb_info *info, unsigned long pixclk)
> +//{
> +// struct nuc900fb_info *fbi = info->par;
> +// int div;
> +// if (clk <= 15 * 1000 * 1000) {
> +// div = (15 * 1000 * 1000)/
> +// nuc900_driver_clksrc_div(fbi->dev, "ext", 0x2);
> +// }
> +//
> +//}
Please feed the patch through scrupts/checkpatch.pl.
> +/*
> + * calculate divider for lcd div
> + */
> +static unsigned int nuc900fb_calc_pixclk(struct nuc900fb_info *fbi,
> + unsigned long pixclk)
> +{
> + unsigned long clk = fbi->clk_rate;
> + unsigned long long div;
> +
> + /* pixclk is in picseconds. our clock is in Hz*/
> + /* div = (clk * pixclk)/10^12 */
> + div = (unsigned long long)clk * pixclk;
> + div >>= 12;
> + do_div(div, 625 * 625UL * 625);
> +
> + dprintk("pixclk %ld, divisor is %ld\n", pixclk, (long)div);
Perhaps use %lld and remove the cast.
Some of the printks in here really should be printks, not the
compile-time-suppressible dprintk(). Please review them all and
convert the ones which will be useful to end-users into printk().
The above four lines are unneeded, but it's OK keeping them for
documentation purposes.
newline here, please.
> + regs->lcd_crtc_size = LCM_CRTC_SIZE_VTTVAL(vtt) |
> + LCM_CRTC_SIZE_HTTVAL(htt);
> + regs->lcd_crtc_dend = LCM_CRTC_DEND_VDENDVAL(var->height) |
> + LCM_CRTC_DEND_HDENDVAL(var->width);
> + regs->lcd_crtc_hr = LCM_CRTC_HR_EVAL(var->width + 5) |
> + LCM_CRTC_HR_SVAL(var->width + 1);
> + regs->lcd_crtc_hsync = LCM_CRTC_HSYNC_EVAL(hsync + var->hsync_len) |
> + LCM_CRTC_HSYNC_SVAL(hsync);
> + regs->lcd_crtc_vr = LCM_CRTC_VR_EVAL(vsync + var->vsync_len) |
> + LCM_CRTC_VR_SVAL(vsync);
> +
> +}
> +
>
> ...
>
> +static int nuc900fb_debug_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t len)
> +{
> + if (len < 1)
> + return -EINVAL;
> +
> + if (strnicmp(buf, "on", 2) == 0 ||
> + strnicmp(buf, "1", 1) == 0) {
> + debug = 1;
> + } else if (strnicmp(buf, "off", 3) == 0 ||
> + strnicmp(buf, "0", 1) == 0) {
> + debug = 0;
> +
> + } else {
> + return -EINVAL;
> + }
> +
> + return len;
> +}
Duplicates the above-mentioned dynamic-debug facility.
> +static DEVICE_ATTR(debug, 0666, nuc900fb_debug_show, nuc900fb_debug_store);
> +
>
> ...
>
> +static int __init nuc900fb_map_video_memory(struct fb_info *info)
> +{
> + struct nuc900fb_info *fbi = info->par;
> + dma_addr_t map_dma;
> + unsigned long map_size = PAGE_ALIGN(info->fix.smem_len);
> +
> + dprintk("nuc900fb_map_video_memory(fbi=%p) map_size %lu\n",
> + fbi, map_size);
> +
> + info->screen_base = dma_alloc_writecombine(fbi->dev, map_size,
> + &map_dma, GFP_KERNEL);
Here, do
if (!info->screen_base)
return -ENOMEM;
and the rest of the function gets neater.
> + if (info->screen_base != NULL) {
> + dprintk("nuc900fb_map_video_memory: clear %p:%08lx\n",
> + info->screen_base, map_size);
> + memset(info->screen_base, 0x00, map_size);
> +
> + info->fix.smem_start = map_dma;
> + dprintk("nuc900fb_map_video_memory: "
> + "dma=%08lx cpu=%p size=%08lx\n",
> + info->fix.smem_start, info->screen_base, map_size);
> + }
> + return (info->screen_base) ? 0 : -ENOMEM;
> +}
> +
>
> ...
>
> +static char driver_name[] = "nuc900fb";
> +
> +static int __init nuc900fb_probe(struct platform_device *pdev)
Should this be __devinit?
> ...
>
> +static void nuc900fb_stop_lcd(struct fb_info *info)
> +{
> + struct nuc900fb_info *fbi = info->par;
> + void __iomem *regs = fbi->io;
> + unsigned long flags;
> +
> + local_irq_save(flags);
> + writel((~LCM_DCCS_DISP_INT_EN) | (~LCM_DCCS_VA_EN) | (~LCM_DCCS_OSD_EN),
> + regs + REG_LCM_DCCS);
> + local_irq_restore(flags);
> +}
The local_irq_save() is a worry. What's it doing here? It does
nothing to prevent an interrupt on another CPU!
> ...
>
The driver generally looks OK to me. Please cc me on any updates.
H Hartley Sweeten
Wouldn't this also work?
.dev = {
.dma_mask = &nuc900_device_lcd.dev.coherent_dma_mask,
.coherent_dma_mask = DMA_BIT_MASK(32),
},
Then you could just get rid of nuc900_device_lcd_dmamask.
Regards,
Hartley
Qiang Wang
Thanks for your comments.
I will update my patch as soon as possible.
Qiang Wang
Yes, you are right.
I will use the DMA_BIT_MASK macro.
Thank you very much.
>
> Regards,
> Hartley
>
Qiang Wang
I modified the nuc900 LCD Controller base on your comments.
Hope it will be fine:)
Best regards,
Wang Qiang
Signed-off-by: Wang Qiang <ruralit...@gmail.com>
Cc: Andrew Morton <ak...@linux-foundation.org>
Cc: Russell King <r...@arm.linux.org.uk>
Cc: Wang Zongshun <mcuo...@gmail.com>
Cc: Krzysztof Helt <krzysz...@poczta.fm>
---
arch/arm/configs/nuc950_defconfig | 53 ++-
arch/arm/mach-w90x900/cpu.h | 1 +
arch/arm/mach-w90x900/dev.c | 42 ++
arch/arm/mach-w90x900/include/mach/fb.h | 83 +++
arch/arm/mach-w90x900/include/mach/regs-ldm.h | 253 ++++++++
arch/arm/mach-w90x900/mach-nuc950evb.c | 47 ++
arch/arm/mach-w90x900/nuc950.c | 4 +
drivers/video/Kconfig | 21 +
drivers/video/Makefile | 1 +
drivers/video/nuc900fb.c | 779 +++++++++++++++++++++++++
drivers/video/nuc900fb.h | 55 ++
11 files changed, 1338 insertions(+), 1 deletions(-)
create mode 100644 arch/arm/mach-w90x900/include/mach/fb.h
create mode 100644 arch/arm/mach-w90x900/include/mach/regs-ldm.h
create mode 100644 drivers/video/nuc900fb.c
create mode 100644 drivers/video/nuc900fb.h
index ec711f4..4887612 100644
--- a/arch/arm/mach-w90x900/dev.c
+++ b/arch/arm/mach-w90x900/dev.c
@@ -34,6 +34,7 @@
#include <mach/regs-serial.h>
#include <mach/nuc900_spi.h>
#include <mach/map.h>
+#include <mach/fb.h>
#include "cpu.h"
@@ -380,6 +381,47 @@ struct platform_device nuc900_device_kpi = {
.resource = nuc900_kpi_resource,
};
+#ifdef CONFIG_FB_NUC900
+
+static struct resource nuc900_lcd_resource[] = {
+ [0] = {
+ .start = W90X900_PA_LCD,
+ .end = W90X900_PA_LCD + W90X900_SZ_LCD - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_LCD,
+ .end = IRQ_LCD,
+ .flags = IORESOURCE_IRQ,
+ }
+};
+
+static u64 nuc900_device_lcd_dmamask = -1;
+struct platform_device nuc900_device_lcd = {
+ .name = "nuc900-lcd",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(nuc900_lcd_resource),
+ .resource = nuc900_lcd_resource,
+ .dev = {
+ .dma_mask = &nuc900_device_lcd_dmamask,
+ .coherent_dma_mask = -1,
#include "nuc950.h"
index 0000000..6bf0d46
--- /dev/null
+++ b/drivers/video/nuc900fb.c
@@ -0,0 +1,779 @@
+/*
+ *
+ * Copyright (c) 2009 Nuvoton technology corporation
+ * 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 as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Description:
+ * Nuvoton LCD Controller Driver
+ * Author:
+ * Wang Qiang (ruralit...@gmail.com) 2009/12/11
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/wait.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/cpufreq.h>
+#include <linux/io.h>
+#include <linux/pm.h>
+#include <linux/device.h>
+
+#include <mach/map.h>
+#include <mach/regs-clock.h>
+#include <mach/regs-ldm.h>
+#include <mach/fb.h>
+#include <mach/clkdev.h>
+
+#include "nuc900fb.h"
+
+
+/*
+ * Initialize the nuc900 video (dual) buffer address
+ */
+static void nuc900fb_set_lcdaddr(struct fb_info *info)
+{
+ struct nuc900fb_info *fbi = info->par;
+ void __iomem *regs = fbi->io;
+ unsigned long vbaddr1, vbaddr2;
+
+ vbaddr1 = info->fix.smem_start;
+ vbaddr2 = info->fix.smem_start;
+ vbaddr2 += info->fix.line_length * info->var.yres;
+
+ /* set frambuffer start phy addr*/
+ writel(vbaddr1, regs + REG_LCM_VA_BADDR0);
+ writel(vbaddr2, regs + REG_LCM_VA_BADDR1);
+
+ writel(fbi->regs.lcd_va_fbctrl, regs + REG_LCM_VA_FBCTRL);
+ writel(fbi->regs.lcd_va_scale, regs + REG_LCM_VA_SCALE);
+}
+
+/*
+ * calculate divider for lcd div
+ */
+static unsigned int nuc900fb_calc_pixclk(struct nuc900fb_info *fbi,
+ unsigned long pixclk)
+{
+ unsigned long clk = fbi->clk_rate;
+ unsigned long long div;
+
+ /* pixclk is in picseconds. our clock is in Hz*/
+ /* div = (clk * pixclk)/10^12 */
+ div = (unsigned long long)clk * pixclk;
+ div >>= 12;
+ do_div(div, 625 * 625UL * 625);
+
+ dev_dbg(fbi->dev, "pixclk %ld, divisor is %lld\n", pixclk, div);
+
+ return div;
+}
+
+/*
+ * Check the video params of 'var'.
+ */
+static int nuc900fb_check_var(struct fb_var_screeninfo *var,
+ struct fb_info *info)
+{
+ struct nuc900fb_info *fbi = info->par;
+ struct nuc900fb_mach_info *mach_info = fbi->dev->platform_data;
+ struct nuc900fb_display *display = NULL;
+ struct nuc900fb_display *default_display = mach_info->displays +
+ mach_info->default_display;
+ int i;
+
+ dev_dbg(fbi->dev, "check_var(var=%p, info=%p)\n", var, info);
+
+ /* validate x/y resolution */
+ /* choose default mode if possible */
+ if (var->xres == default_display->xres &&
+ var->yres == default_display->yres &&
+ var->bits_per_pixel == default_display->bpp)
+ display = default_display;
+ else
+ for (i = 0; i < mach_info->num_displays; i++)
+ if (var->xres == mach_info->displays[i].xres &&
+ var->yres == mach_info->displays[i].yres &&
+ var->bits_per_pixel == mach_info->displays[i].bpp) {
+ display = mach_info->displays + i;
+ break;
+ }
+
+ if (display == NULL) {
+ printk(KERN_ERR "wrong resolution or depth %dx%d at %d bit per pixel\n",
+ var->xres, var->yres, var->bits_per_pixel);
+
+ regs->lcd_crtc_size = LCM_CRTC_SIZE_VTTVAL(vtt) |
+ LCM_CRTC_SIZE_HTTVAL(htt);
+ regs->lcd_crtc_dend = LCM_CRTC_DEND_VDENDVAL(var->height) |
+ LCM_CRTC_DEND_HDENDVAL(var->width);
+ regs->lcd_crtc_hr = LCM_CRTC_HR_EVAL(var->width + 5) |
+ LCM_CRTC_HR_SVAL(var->width + 1);
+ regs->lcd_crtc_hsync = LCM_CRTC_HSYNC_EVAL(hsync + var->hsync_len) |
+ LCM_CRTC_HSYNC_SVAL(hsync);
+ regs->lcd_crtc_vr = LCM_CRTC_VR_EVAL(vsync + var->vsync_len) |
+ LCM_CRTC_VR_SVAL(vsync);
+
+}
+
+/*
+ * Activate (set) the controller from the given framebuffer
+ * information
+ */
+static void nuc900fb_activate_var(struct fb_info *info)
+{
+ struct nuc900fb_info *fbi = info->par;
+ void __iomem *regs = fbi->io;
+ struct fb_var_screeninfo *var = &info->var;
+ int clkdiv;
+
+ clkdiv = nuc900fb_calc_pixclk(fbi, var->pixclock) - 1;
+ if (clkdiv < 0)
+ clkdiv = 0;
+
+ nuc900fb_calculate_lcd_regs(info, &fbi->regs);
+
+ /* set the new lcd registers*/
+
+ dev_dbg(fbi->dev, "new lcd register set:\n");
+ dev_dbg(fbi->dev, "dccs = 0x%08x\n", fbi->regs.lcd_dccs);
+ dev_dbg(fbi->dev, "dev_ctl = 0x%08x\n", fbi->regs.lcd_device_ctrl);
+ dev_dbg(fbi->dev, "crtc_size = 0x%08x\n", fbi->regs.lcd_crtc_size);
+ dev_dbg(fbi->dev, "crtc_dend = 0x%08x\n", fbi->regs.lcd_crtc_dend);
+ dev_dbg(fbi->dev, "crtc_hr = 0x%08x\n", fbi->regs.lcd_crtc_hr);
+ dev_dbg(fbi->dev, "crtc_hsync = 0x%08x\n", fbi->regs.lcd_crtc_hsync);
+ dev_dbg(fbi->dev, "crtc_vr = 0x%08x\n", fbi->regs.lcd_crtc_vr);
+
+ writel(fbi->regs.lcd_device_ctrl, regs + REG_LCM_DEV_CTRL);
+ writel(fbi->regs.lcd_crtc_size, regs + REG_LCM_CRTC_SIZE);
+ writel(fbi->regs.lcd_crtc_dend, regs + REG_LCM_CRTC_DEND);
+ writel(fbi->regs.lcd_crtc_hr, regs + REG_LCM_CRTC_HR);
+ writel(fbi->regs.lcd_crtc_hsync, regs + REG_LCM_CRTC_HSYNC);
+ writel(fbi->regs.lcd_crtc_vr, regs + REG_LCM_CRTC_VR);
+
+ /* set lcd address pointers */
+ nuc900fb_set_lcdaddr(info);
+
+ writel(fbi->regs.lcd_dccs, regs + REG_LCM_DCCS);
+}
+
+/*
+ * Alters the hardware state.
+ *
+ */
+static int nuc900fb_set_par(struct fb_info *info)
+{
+ struct fb_var_screeninfo *var = &info->var;
+
+ switch (var->bits_per_pixel) {
+ case 32:
+ case 24:
+ case 18:
+ case 16:
+ case 12:
+ info->fix.visual = FB_VISUAL_TRUECOLOR;
+ break;
+ case 1:
+ info->fix.visual = FB_VISUAL_MONO01;
+ break;
+ default:
+ info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+ break;
+ }
+
+ info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8;
+
+ /* activate this new configuration */
+ nuc900fb_activate_var(info);
+ return 0;
+}
+
+static inline unsigned int chan_to_field(unsigned int chan,
+ struct fb_bitfield *bf)
+{
+ chan &= 0xffff;
+ chan >>= 16 - bf->length;
+ return chan << bf->offset;
+}
+
+static int nuc900fb_setcolreg(unsigned regno,
+ unsigned red, unsigned green, unsigned blue,
+ unsigned transp, struct fb_info *info)
+{
+ unsigned int val;
+
+ switch (info->fix.visual) {
+ case FB_VISUAL_TRUECOLOR:
+ /* true-colour, use pseuo-palette */
+ if (regno < 16) {
+ u32 *pal = info->pseudo_palette;
+
+ val = chan_to_field(red, &info->var.red);
+ val |= chan_to_field(green, &info->var.green);
+ val |= chan_to_field(blue, &info->var.blue);
+ pal[regno] = val;
+ }
+ break;
+
+ default:
+ return 1; /* unknown type */
+ }
+ return 0;
+}
+
+/**
+ * nuc900fb_blank
+ *
+ */
+static int nuc900fb_blank(int blank_mode, struct fb_info *info)
+{
+
+ return 0;
+}
+
+static struct fb_ops nuc900fb_ops = {
+ .owner = THIS_MODULE,
+ .fb_check_var = nuc900fb_check_var,
+ .fb_set_par = nuc900fb_set_par,
+ .fb_blank = nuc900fb_blank,
+ .fb_setcolreg = nuc900fb_setcolreg,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+};
+
+
+static inline void modify_gpio(void __iomem *reg,
+ unsigned long set, unsigned long mask)
+{
+ unsigned long tmp;
+ tmp = readl(reg) & ~mask;
+ writel(tmp | set, reg);
+}
+
+/*
+ * Initialise LCD-related registers
+ */
+static int nuc900fb_init_registers(struct fb_info *info)
+{
+ struct nuc900fb_info *fbi = info->par;
+ struct nuc900fb_mach_info *mach_info = fbi->dev->platform_data;
+ void __iomem *regs = fbi->io;
+
+ /*reset the display engine*/
+ writel(0, regs + REG_LCM_DCCS);
+ writel(readl(regs + REG_LCM_DCCS) | LCM_DCCS_ENG_RST,
+ regs + REG_LCM_DCCS);
+ ndelay(100);
+ writel(readl(regs + REG_LCM_DCCS) & (~LCM_DCCS_ENG_RST),
+ regs + REG_LCM_DCCS);
+ ndelay(100);
+
+ writel(0, regs + REG_LCM_DEV_CTRL);
+
+ /* config gpio output */
+ modify_gpio(W90X900_VA_GPIO + 0x54, mach_info->gpio_dir,
+ mach_info->gpio_dir_mask);
+ modify_gpio(W90X900_VA_GPIO + 0x58, mach_info->gpio_data,
+ mach_info->gpio_data_mask);
+
+ return 0;
+}
+
+
+/*
+ * Alloc the SDRAM region of NUC900 for the frame buffer.
+ * The buffer should be a non-cached, non-buffered, memory region
+ * to allow palette and pixel writes without flushing the cache.
+ */
+static int __init nuc900fb_map_video_memory(struct fb_info *info)
+{
+ struct nuc900fb_info *fbi = info->par;
+ dma_addr_t map_dma;
+ unsigned long map_size = PAGE_ALIGN(info->fix.smem_len);
+
+ dev_dbg(fbi->dev, "nuc900fb_map_video_memory(fbi=%p) map_size %lu\n",
+ fbi, map_size);
+
+ info->screen_base = dma_alloc_writecombine(fbi->dev, map_size,
+ &map_dma, GFP_KERNEL);
+
+ if (!info->screen_base)
+ return -ENOMEM;
+
+ memset(info->screen_base, 0x00, map_size);
+ info->fix.smem_start = map_dma;
+
+ return 0;
+}
+
+static inline void nuc900fb_unmap_video_memory(struct fb_info *info)
+{
+ struct nuc900fb_info *fbi = info->par;
+ dma_free_writecombine(fbi->dev, PAGE_ALIGN(info->fix.smem_len),
+ info->screen_base, info->fix.smem_start);
+}
+
+static irqreturn_t nuc900fb_irqhandler(int irq, void *dev_id)
+{
+ struct nuc900fb_info *fbi = dev_id;
+ void __iomem *regs = fbi->io;
+ void __iomem *irq_base = fbi->irq_base;
+ unsigned long lcdirq = readl(regs + REG_LCM_INT_CS);
+
+ if (lcdirq & LCM_INT_CS_DISP_F_STATUS) {
+ writel(readl(irq_base) | 1<<30, irq_base);
+
+ /* wait VA_EN low */
+ if ((readl(regs + REG_LCM_DCCS) &
+ LCM_DCCS_SINGLE) == LCM_DCCS_SINGLE)
+ while ((readl(regs + REG_LCM_DCCS) &
+ LCM_DCCS_VA_EN) == LCM_DCCS_VA_EN)
+ ;
+ /* display_out-enable */
+ writel(readl(regs + REG_LCM_DCCS) | LCM_DCCS_DISP_OUT_EN,
+ regs + REG_LCM_DCCS);
+ /* va-enable*/
+ writel(readl(regs + REG_LCM_DCCS) | LCM_DCCS_VA_EN,
+ regs + REG_LCM_DCCS);
+ } else if (lcdirq & LCM_INT_CS_UNDERRUN_INT) {
+ writel(readl(irq_base) | LCM_INT_CS_UNDERRUN_INT, irq_base);
+ } else if (lcdirq & LCM_INT_CS_BUS_ERROR_INT) {
+ writel(readl(irq_base) | LCM_INT_CS_BUS_ERROR_INT, irq_base);
+ }
+
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_CPU_FREQ
+
+static int nuc900fb_cpufreq_transition(struct notifier_block *nb,
+ unsigned long val, void *data)
+{
+ struct nuc900fb_info *info;
+ struct fb_info *fbinfo;
+ long delta_f;
+ info = container_of(nb, struct nuc900fb_info, freq_transition);
+ fbinfo = platform_get_drvdata(to_platform_device(info->dev));
+
+ delta_f = info->clk_rate - clk_get_rate(info->clk);
+
+ if ((val == CPUFREQ_POSTCHANGE && delta_f > 0) ||
+ (val == CPUFREQ_PRECHANGE && delta_f < 0)) {
+ info->clk_rate = clk_get_rate(info->clk);
+ nuc900fb_activate_var(fbinfo);
+ }
+
+ return 0;
+}
+
+static inline int nuc900fb_cpufreq_register(struct nuc900fb_info *fbi)
+{
+ fbi->freq_transition.notifier_call = nuc900fb_cpufreq_transition;
+ return cpufreq_register_notifier(&fbi->freq_transition,
+ CPUFREQ_TRANSITION_NOTIFIER);
+}
+
+static inline void nuc900fb_cpufreq_deregister(struct nuc900fb_info *fbi)
+{
+ cpufreq_unregister_notifier(&fbi->freq_transition,
+ CPUFREQ_TRANSITION_NOTIFIER);
+}
+#else
+static inline int nuc900fb_cpufreq_transition(struct notifier_block *nb,
+ unsigned long val, void *data)
+{
+ return 0;
+}
+
+static inline int nuc900fb_cpufreq_register(struct nuc900fb_info *fbi)
+{
+ return 0;
+}
+
+static inline void nuc900fb_cpufreq_deregister(struct nuc900fb_info *info)
+{
+}
+#endif
+
+static char driver_name[] = "nuc900fb";
+
+static int __devinit nuc900fb_probe(struct platform_device *pdev)
+{
+ struct nuc900fb_info *fbi;
+ struct nuc900fb_display *display;
+ struct fb_info *fbinfo;
+ struct nuc900fb_mach_info *mach_info;
+ struct resource *res;
+ int ret;
+ int irq;
+ int i;
+ int size;
+
+ dev_dbg(&pdev->dev, "devinit\n");
+ dev_dbg(&pdev->dev, "got and enabled clock\n");
+
+ fbi->clk_rate = clk_get_rate(fbi->clk);
+
+ /* calutate the video buffer size */
+ for (i = 0; i < mach_info->num_displays; i++) {
+ unsigned long smem_len = mach_info->displays[i].xres;
+ smem_len *= mach_info->displays[i].yres;
+ smem_len *= mach_info->displays[i].bpp;
+ smem_len >>= 3;
+ if (fbinfo->fix.smem_len < smem_len)
+ fbinfo->fix.smem_len = smem_len;
+ }
+
+ /* Initialize Video Memory */
+ ret = nuc900fb_map_video_memory(fbinfo);
+ if (ret) {
+ printk(KERN_ERR "Failed to allocate video RAM: %x\n", ret);
+ goto release_clock;
+ }
+
+ dev_dbg(&pdev->dev, "got video memory\n");
+
+ fbinfo->var.xres = display->xres;
+ fbinfo->var.yres = display->yres;
+ fbinfo->var.bits_per_pixel = display->bpp;
+
+ nuc900fb_init_registers(fbinfo);
+
+ nuc900fb_check_var(&fbinfo->var, fbinfo);
+
+ ret = nuc900fb_cpufreq_register(fbi);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to register cpufreq\n");
+ goto free_video_memory;
+ }
+
+ ret = register_framebuffer(fbinfo);
+ if (ret) {
+ printk(KERN_ERR "failed to register framebuffer device: %d\n",
+ ret);
+ goto free_cpufreq;
+ }
+
+ printk(KERN_INFO "fb%d: %s frame buffer device\n",
+ fbinfo->node, fbinfo->fix.id);
+
+ return 0;
+
+free_cpufreq:
+ nuc900fb_cpufreq_deregister(fbi);
+free_video_memory:
+ nuc900fb_unmap_video_memory(fbinfo);
+release_clock:
+ clk_disable(fbi->clk);
+ clk_put(fbi->clk);
+release_irq:
+ free_irq(irq, fbi);
+release_regs:
+ iounmap(fbi->io);
+release_mem_region:
+ release_mem_region((unsigned long)fbi->mem, size);
+free_fb:
+ framebuffer_release(fbinfo);
+ return ret;
+}
+
+/*
+ * shutdown the lcd controller
+ */
+static void nuc900fb_stop_lcd(struct fb_info *info)
+{
+ struct nuc900fb_info *fbi = info->par;
+ void __iomem *regs = fbi->io;
+
+ writel((~LCM_DCCS_DISP_INT_EN) | (~LCM_DCCS_VA_EN) | (~LCM_DCCS_OSD_EN),
+ regs + REG_LCM_DCCS);
+}
+
+#ifdef CONFIG_PM
+
+/*
+ * suspend and resume support for the lcd controller
+ */
+
+static int nuc900fb_suspend(struct platform_device *dev, pm_message_t state)
+{
+ struct fb_info *fbinfo = platform_get_drvdata(dev);
+ struct nuc900fb_info *info = fbinfo->par;
+
+ nuc900fb_stop_lcd();
+ msleep(1);
+ clk_disable(info->clk);
+ return 0;
+}
+
+static int nuc900fb_resume(struct platform_device *dev)
+{
+ struct fb_info *fbinfo = platform_get_drvdata(dev);
+ struct nuc900fb_info *fbi = fbinfo->par;
+
+ printk(KERN_INFO "nuc900fb resume\n");
+
+ clk_enable(fbi->clk);
+ msleep(1);
+
+ nuc900fb_init_registers(fbinfo);
+ nuc900fb_activate_var(bfinfo);
+
+ return 0;
+}
+
+#else
+#define nuc900fb_suspend NULL
+#define nuc900fb_resume NULL
+#endif
+
+static struct platform_driver nuc900fb_driver = {
+ .probe = nuc900fb_probe,
+ .remove = nuc900fb_remove,
+ .suspend = nuc900fb_suspend,
+ .resume = nuc900fb_resume,
+ .driver = {
+ .name = "nuc900-lcd",