Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *  Cobalt/SEAD3 LCD frame buffer driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *  Copyright (C) 2008  Yoichi Yuasa <yuasa@linux-mips.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *  Copyright (C) 2012  MIPS Technologies, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/fb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/ioport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * Cursor position address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * \X  0    1    2  ...  14   15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * Y+----+----+----+---+----+----+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * 0|0x00|0x01|0x02|...|0x0e|0x0f|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  *  +----+----+----+---+----+----+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * 1|0x40|0x41|0x42|...|0x4e|0x4f|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  *  +----+----+----+---+----+----+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define LCD_DATA_REG_OFFSET	0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define LCD_XRES_MAX		16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define LCD_YRES_MAX		2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define LCD_CHARS_MAX		32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define LCD_CLEAR		0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define LCD_CURSOR_MOVE_HOME	0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define LCD_RESET		0x06
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define LCD_OFF			0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define LCD_CURSOR_OFF		0x0c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define LCD_CURSOR_BLINK_OFF	0x0e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define LCD_CURSOR_ON		0x0f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #define LCD_ON			LCD_CURSOR_ON
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #define LCD_CURSOR_MOVE_LEFT	0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define LCD_CURSOR_MOVE_RIGHT	0x14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define LCD_DISPLAY_LEFT	0x18
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #define LCD_DISPLAY_RIGHT	0x1c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #define LCD_PRERESET		0x3f	/* execute 4 times continuously */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) #define LCD_BUSY		0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) #define LCD_GRAPHIC_MODE	0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) #define LCD_TEXT_MODE		0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) #define LCD_CUR_POS_MASK	0x7f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) #define LCD_CUR_POS(x)		((x) & LCD_CUR_POS_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) #define LCD_TEXT_POS(x)		((x) | LCD_TEXT_MODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) static inline void lcd_write_control(struct fb_info *info, u8 control)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	writel((u32)control << 24, info->screen_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) static inline u8 lcd_read_control(struct fb_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	return readl(info->screen_base) >> 24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) static inline void lcd_write_data(struct fb_info *info, u8 data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	writel((u32)data << 24, info->screen_base + LCD_DATA_REG_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) static inline u8 lcd_read_data(struct fb_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	return readl(info->screen_base + LCD_DATA_REG_OFFSET) >> 24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) static int lcd_busy_wait(struct fb_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	u8 val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	int timeout = 10, retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		val = lcd_read_control(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		val &= LCD_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		if (val != LCD_BUSY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		if (msleep_interruptible(1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 			return -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		timeout--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	} while (timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	if (val == LCD_BUSY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		retval = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) static void lcd_clear(struct fb_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	for (i = 0; i < 4; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		udelay(150);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		lcd_write_control(info, LCD_PRERESET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	udelay(150);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	lcd_write_control(info, LCD_CLEAR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	udelay(150);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	lcd_write_control(info, LCD_RESET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static const struct fb_fix_screeninfo cobalt_lcdfb_fix = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	.id		= "cobalt-lcd",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	.type		= FB_TYPE_TEXT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	.type_aux	= FB_AUX_TEXT_MDA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	.visual		= FB_VISUAL_MONO01,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	.line_length	= LCD_XRES_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	.accel		= FB_ACCEL_NONE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static ssize_t cobalt_lcdfb_read(struct fb_info *info, char __user *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 				 size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	char src[LCD_CHARS_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	unsigned long pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	int len, retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	pos = *ppos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	if (pos >= LCD_CHARS_MAX || count == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	if (count > LCD_CHARS_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		count = LCD_CHARS_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	if (pos + count > LCD_CHARS_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		count = LCD_CHARS_MAX - pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	for (len = 0; len < count; len++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		retval = lcd_busy_wait(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		if (retval < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		lcd_write_control(info, LCD_TEXT_POS(pos));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		retval = lcd_busy_wait(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		if (retval < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		src[len] = lcd_read_data(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		if (pos == 0x0f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 			pos = 0x40;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			pos++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	if (retval < 0 && signal_pending(current))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		return -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	if (copy_to_user(buf, src, len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	*ppos += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static ssize_t cobalt_lcdfb_write(struct fb_info *info, const char __user *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 				  size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	char dst[LCD_CHARS_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	unsigned long pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	int len, retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	pos = *ppos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	if (pos >= LCD_CHARS_MAX || count == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	if (count > LCD_CHARS_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		count = LCD_CHARS_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	if (pos + count > LCD_CHARS_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		count = LCD_CHARS_MAX - pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	if (copy_from_user(dst, buf, count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	for (len = 0; len < count; len++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		retval = lcd_busy_wait(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		if (retval < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		lcd_write_control(info, LCD_TEXT_POS(pos));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		retval = lcd_busy_wait(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		if (retval < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		lcd_write_data(info, dst[len]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		if (pos == 0x0f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 			pos = 0x40;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 			pos++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	if (retval < 0 && signal_pending(current))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		return -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	*ppos += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) static int cobalt_lcdfb_blank(int blank_mode, struct fb_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	retval = lcd_busy_wait(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	if (retval < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	switch (blank_mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	case FB_BLANK_UNBLANK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		lcd_write_control(info, LCD_ON);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		lcd_write_control(info, LCD_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static int cobalt_lcdfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	u32 x, y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	switch (cursor->set) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	case FB_CUR_SETPOS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		x = cursor->image.dx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		y = cursor->image.dy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		if (x >= LCD_XRES_MAX || y >= LCD_YRES_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		retval = lcd_busy_wait(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		if (retval < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 			return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		lcd_write_control(info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 				  LCD_TEXT_POS(info->fix.line_length * y + x));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	retval = lcd_busy_wait(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	if (retval < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	if (cursor->enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		lcd_write_control(info, LCD_CURSOR_ON);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		lcd_write_control(info, LCD_CURSOR_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) static const struct fb_ops cobalt_lcd_fbops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	.owner		= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	.fb_read	= cobalt_lcdfb_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	.fb_write	= cobalt_lcdfb_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	.fb_blank	= cobalt_lcdfb_blank,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	.fb_cursor	= cobalt_lcdfb_cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) static int cobalt_lcdfb_probe(struct platform_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	struct fb_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	info = framebuffer_alloc(0, &dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	if (!res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		framebuffer_release(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	info->screen_size = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	info->screen_base = devm_ioremap(&dev->dev, res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 					 info->screen_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	if (!info->screen_base) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		framebuffer_release(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	info->fbops = &cobalt_lcd_fbops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	info->fix = cobalt_lcdfb_fix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	info->fix.smem_start = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	info->fix.smem_len = info->screen_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	info->pseudo_palette = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	info->par = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	info->flags = FBINFO_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	retval = register_framebuffer(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	if (retval < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 		framebuffer_release(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 		return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	platform_set_drvdata(dev, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	lcd_clear(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	fb_info(info, "Cobalt server LCD frame buffer device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) static int cobalt_lcdfb_remove(struct platform_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	struct fb_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	info = platform_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	if (info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 		unregister_framebuffer(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		framebuffer_release(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) static struct platform_driver cobalt_lcdfb_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	.probe	= cobalt_lcdfb_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	.remove	= cobalt_lcdfb_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	.driver	= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		.name	= "cobalt-lcd",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) module_platform_driver(cobalt_lcdfb_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) MODULE_AUTHOR("Yoichi Yuasa");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) MODULE_DESCRIPTION("Cobalt server LCD frame buffer driver");