Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * am200epd.c -- Platform device for AM200 EPD kit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (C) 2008, Jaya Kumar
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * License. See the file COPYING in the main directory of this archive for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * This work was made possible by help and equipment support from E-Ink
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * Corporation. http://support.eink.com/community
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * This driver is written to be used with the Metronome display controller.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * on the AM200 EPD prototype kit/development kit with an E-Ink 800x600
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  * Vizplex EPD on a Gumstix board using the Lyre interface board.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/fb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include <linux/gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include "pxa25x.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #include "gumstix.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #include <linux/platform_data/video-pxafb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #include "generic.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #include <video/metronomefb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) static unsigned int panel_type = 6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) static struct platform_device *am200_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) static struct metronome_board am200_board;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) static struct pxafb_mode_info am200_fb_mode_9inch7 = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	.pixclock	= 40000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	.xres		= 1200,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	.yres		= 842,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	.bpp		= 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	.hsync_len	= 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	.left_margin	= 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	.right_margin	= 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	.vsync_len	= 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	.upper_margin	= 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	.lower_margin	= 25,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	.sync		= FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
^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 struct pxafb_mode_info am200_fb_mode_8inch = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	.pixclock	= 40000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	.xres		= 1088,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	.yres		= 791,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	.bpp		= 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	.hsync_len	= 28,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	.left_margin	= 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	.right_margin	= 30,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	.vsync_len	= 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	.upper_margin	= 10,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	.lower_margin	= 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	.sync		= FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) static struct pxafb_mode_info am200_fb_mode_6inch = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	.pixclock	= 40189,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	.xres		= 832,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	.yres		= 622,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	.bpp		= 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	.hsync_len	= 28,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	.left_margin	= 34,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	.right_margin	= 34,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	.vsync_len	= 25,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	.upper_margin	= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	.lower_margin	= 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	.sync		= FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) static struct pxafb_mach_info am200_fb_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	.modes		= &am200_fb_mode_6inch,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	.num_modes	= 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	.lcd_conn	= LCD_TYPE_COLOR_TFT | LCD_PCLK_EDGE_FALL |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 			  LCD_AC_BIAS_FREQ(24),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) /* register offsets for gpio control */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) #define LED_GPIO_PIN 51
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) #define STDBY_GPIO_PIN 48
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) #define RST_GPIO_PIN 49
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) #define RDY_GPIO_PIN 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) #define ERR_GPIO_PIN 17
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #define PCBPWR_GPIO_PIN 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static int gpios[] = { LED_GPIO_PIN , STDBY_GPIO_PIN , RST_GPIO_PIN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 			RDY_GPIO_PIN, ERR_GPIO_PIN, PCBPWR_GPIO_PIN };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static char *gpio_names[] = { "LED" , "STDBY" , "RST", "RDY", "ERR", "PCBPWR" };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static int am200_init_gpio_regs(struct metronomefb_par *par)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	for (i = 0; i < ARRAY_SIZE(gpios); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		err = gpio_request(gpios[i], gpio_names[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 			dev_err(&am200_device->dev, "failed requesting "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 				"gpio %s, err=%d\n", gpio_names[i], err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 			goto err_req_gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	gpio_direction_output(LED_GPIO_PIN, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	gpio_direction_output(STDBY_GPIO_PIN, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	gpio_direction_output(RST_GPIO_PIN, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	gpio_direction_input(RDY_GPIO_PIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	gpio_direction_input(ERR_GPIO_PIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	gpio_direction_output(PCBPWR_GPIO_PIN, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) err_req_gpio:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	while (--i >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		gpio_free(gpios[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static void am200_cleanup(struct metronomefb_par *par)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	free_irq(PXA_GPIO_TO_IRQ(RDY_GPIO_PIN), par);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	for (i = 0; i < ARRAY_SIZE(gpios); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		gpio_free(gpios[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static int am200_share_video_mem(struct fb_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	/* rough check if this is our desired fb and not something else */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	if ((info->var.xres != am200_fb_info.modes->xres)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		|| (info->var.yres != am200_fb_info.modes->yres))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	/* we've now been notified that we have our new fb */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	am200_board.metromem = info->screen_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	am200_board.host_fbinfo = info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	/* try to refcount host drv since we are the consumer after this */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	if (!try_module_get(info->fbops->owner))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static int am200_unshare_video_mem(struct fb_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	dev_dbg(&am200_device->dev, "ENTER %s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	if (info != am200_board.host_fbinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	module_put(am200_board.host_fbinfo->fbops->owner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static int am200_fb_notifier_callback(struct notifier_block *self,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 				 unsigned long event, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	struct fb_event *evdata = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	struct fb_info *info = evdata->info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	dev_dbg(&am200_device->dev, "ENTER %s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	if (event == FB_EVENT_FB_REGISTERED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		return am200_share_video_mem(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	else if (event == FB_EVENT_FB_UNREGISTERED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		return am200_unshare_video_mem(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) static struct notifier_block am200_fb_notif = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	.notifier_call = am200_fb_notifier_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) /* this gets called as part of our init. these steps must be done now so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)  * that we can use pxa_set_fb_info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) static void __init am200_presetup_fb(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	int fw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	int fh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	int padding_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	int totalsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	switch (panel_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	case 6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		am200_fb_info.modes = &am200_fb_mode_6inch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	case 8:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		am200_fb_info.modes = &am200_fb_mode_8inch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	case 97:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		am200_fb_info.modes = &am200_fb_mode_9inch7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		dev_err(&am200_device->dev, "invalid panel_type selection,"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 						" setting to 6\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		am200_fb_info.modes = &am200_fb_mode_6inch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	/* the frame buffer is divided as follows:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	command | CRC | padding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	16kb waveform data | CRC | padding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	image data | CRC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	fw = am200_fb_info.modes->xres;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	fh = am200_fb_info.modes->yres;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	/* waveform must be 16k + 2 for checksum */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	am200_board.wfm_size = roundup(16*1024 + 2, fw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	padding_size = PAGE_SIZE + (4 * fw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	/* total is 1 cmd , 1 wfm, padding and image */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	totalsize = fw + am200_board.wfm_size + padding_size + (fw*fh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	/* save this off because we're manipulating fw after this and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	 * we'll need it when we're ready to setup the framebuffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	am200_board.fw = fw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	am200_board.fh = fh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	/* the reason we do this adjustment is because we want to acquire
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	 * more framebuffer memory without imposing custom awareness on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	 * underlying pxafb driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	am200_fb_info.modes->yres = DIV_ROUND_UP(totalsize, fw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	/* we divide since we told the LCD controller we're 16bpp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	am200_fb_info.modes->xres /= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	pxa_set_fb_info(NULL, &am200_fb_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) /* this gets called by metronomefb as part of its init, in our case, we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)  * have already completed initial framebuffer init in presetup_fb so we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)  * can just setup the fb access pointers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) static int am200_setup_fb(struct metronomefb_par *par)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	int fw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	int fh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	fw = am200_board.fw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	fh = am200_board.fh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	/* metromem was set up by the notifier in share_video_mem so now
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	 * we can use its value to calculate the other entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	par->metromem_cmd = (struct metromem_cmd *) am200_board.metromem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	par->metromem_wfm = am200_board.metromem + fw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	par->metromem_img = par->metromem_wfm + am200_board.wfm_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	par->metromem_img_csum = (u16 *) (par->metromem_img + (fw * fh));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	par->metromem_dma = am200_board.host_fbinfo->fix.smem_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) static int am200_get_panel_type(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	return panel_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) static irqreturn_t am200_handle_irq(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	struct metronomefb_par *par = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	wake_up_interruptible(&par->waitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) static int am200_setup_irq(struct fb_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	ret = request_irq(PXA_GPIO_TO_IRQ(RDY_GPIO_PIN), am200_handle_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 				IRQF_TRIGGER_FALLING, "AM200", info->par);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		dev_err(&am200_device->dev, "request_irq failed: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static void am200_set_rst(struct metronomefb_par *par, int state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	gpio_set_value(RST_GPIO_PIN, state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) static void am200_set_stdby(struct metronomefb_par *par, int state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	gpio_set_value(STDBY_GPIO_PIN, state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) static int am200_wait_event(struct metronomefb_par *par)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	return wait_event_timeout(par->waitq, gpio_get_value(RDY_GPIO_PIN), HZ);
^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) static int am200_wait_event_intr(struct metronomefb_par *par)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	return wait_event_interruptible_timeout(par->waitq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 					gpio_get_value(RDY_GPIO_PIN), HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) static struct metronome_board am200_board = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	.owner			= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	.setup_irq		= am200_setup_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	.setup_io		= am200_init_gpio_regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	.setup_fb		= am200_setup_fb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	.set_rst		= am200_set_rst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	.set_stdby		= am200_set_stdby,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	.met_wait_event		= am200_wait_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	.met_wait_event_intr	= am200_wait_event_intr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	.get_panel_type		= am200_get_panel_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	.cleanup		= am200_cleanup,
^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) static unsigned long am200_pin_config[] __initdata = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	GPIO51_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	GPIO49_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	GPIO48_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	GPIO32_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	GPIO17_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	GPIO16_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) int __init am200_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	 * Before anything else, we request notification for any fb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	 * creation events.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	 * FIXME: This is terrible and needs to be nuked. The notifier is used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	 * to get at the fb base address from the boot splash fb driver, which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	 * is then passed to metronomefb. Instaed of metronomfb or this board
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	 * support file here figuring this out on their own.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	 * See also the #ifdef in fbmem.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	fb_register_client(&am200_fb_notif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	pxa2xx_mfp_config(ARRAY_AND_SIZE(am200_pin_config));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	/* request our platform independent driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	request_module("metronomefb");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	am200_device = platform_device_alloc("metronomefb", -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	if (!am200_device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	/* the am200_board that will be seen by metronomefb is a copy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	platform_device_add_data(am200_device, &am200_board,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 					sizeof(am200_board));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	/* this _add binds metronomefb to am200. metronomefb refcounts am200 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	ret = platform_device_add(am200_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 		platform_device_put(am200_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 		fb_unregister_client(&am200_fb_notif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	am200_presetup_fb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) module_param(panel_type, uint, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) MODULE_PARM_DESC(panel_type, "Select the panel type: 6, 8, 97");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) MODULE_DESCRIPTION("board driver for am200 metronome epd kit");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) MODULE_AUTHOR("Jaya Kumar");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) MODULE_LICENSE("GPL");