Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * am300epd.c -- Platform device for AM300 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)  * This work was made possible by help and equipment support from E-Ink
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * Corporation. http://support.eink.com/community
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * This driver is written to be used with the Broadsheet display controller.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * on the AM300 EPD prototype kit/development kit with an E-Ink 800x600
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * Vizplex EPD on a Gumstix board using the Broadsheet interface board.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  *
^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) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/fb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include "gumstix.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #include "mfp-pxa25x.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include <mach/irqs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #include <linux/platform_data/video-pxafb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #include "generic.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #include <video/broadsheetfb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) static unsigned int panel_type = 6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) static struct platform_device *am300_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) static struct broadsheet_board am300_board;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) static unsigned long am300_pin_config[] __initdata = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	GPIO16_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	GPIO17_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	GPIO32_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	GPIO48_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	GPIO49_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	GPIO51_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	GPIO74_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	GPIO75_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	GPIO76_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	GPIO77_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	/* this is the 16-bit hdb bus 58-73 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	GPIO58_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	GPIO59_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	GPIO60_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	GPIO61_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	GPIO62_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	GPIO63_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	GPIO64_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	GPIO65_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	GPIO66_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	GPIO67_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	GPIO68_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	GPIO69_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	GPIO70_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	GPIO71_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	GPIO72_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	GPIO73_GPIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) /* register offsets for gpio control */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) #define PWR_GPIO_PIN	16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) #define CFG_GPIO_PIN	17
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) #define RDY_GPIO_PIN	32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) #define DC_GPIO_PIN	48
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) #define RST_GPIO_PIN	49
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) #define LED_GPIO_PIN	51
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) #define RD_GPIO_PIN	74
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) #define WR_GPIO_PIN	75
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) #define CS_GPIO_PIN	76
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) #define IRQ_GPIO_PIN	77
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) /* hdb bus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) #define DB0_GPIO_PIN	58
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) #define DB15_GPIO_PIN	73
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) static int gpios[] = { PWR_GPIO_PIN, CFG_GPIO_PIN, RDY_GPIO_PIN, DC_GPIO_PIN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			RST_GPIO_PIN, RD_GPIO_PIN, WR_GPIO_PIN, CS_GPIO_PIN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			IRQ_GPIO_PIN, LED_GPIO_PIN };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) static char *gpio_names[] = { "PWR", "CFG", "RDY", "DC", "RST", "RD", "WR",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 				"CS", "IRQ", "LED" };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static int am300_wait_event(struct broadsheetfb_par *par)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	/* todo: improve err recovery */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	wait_event(par->waitq, gpio_get_value(RDY_GPIO_PIN));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	return 0;
^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) static int am300_init_gpio_regs(struct broadsheetfb_par *par)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	char dbname[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	for (i = 0; i < ARRAY_SIZE(gpios); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		err = gpio_request(gpios[i], gpio_names[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 			dev_err(&am300_device->dev, "failed requesting "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 				"gpio %s, err=%d\n", gpio_names[i], err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 			goto err_req_gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	/* we also need to take care of the hdb bus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	for (i = DB0_GPIO_PIN; i <= DB15_GPIO_PIN; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		sprintf(dbname, "DB%d", i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		err = gpio_request(i, dbname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			dev_err(&am300_device->dev, "failed requesting "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 				"gpio %d, err=%d\n", i, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			goto err_req_gpio2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	/* setup the outputs and init values */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	gpio_direction_output(PWR_GPIO_PIN, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	gpio_direction_output(CFG_GPIO_PIN, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	gpio_direction_output(DC_GPIO_PIN, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	gpio_direction_output(RD_GPIO_PIN, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	gpio_direction_output(WR_GPIO_PIN, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	gpio_direction_output(CS_GPIO_PIN, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	gpio_direction_output(RST_GPIO_PIN, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	/* setup the inputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	gpio_direction_input(RDY_GPIO_PIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	gpio_direction_input(IRQ_GPIO_PIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	/* start the hdb bus as an input */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	for (i = DB0_GPIO_PIN; i <= DB15_GPIO_PIN; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		gpio_direction_output(i, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	/* go into command mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	gpio_set_value(CFG_GPIO_PIN, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	gpio_set_value(RST_GPIO_PIN, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	msleep(10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	gpio_set_value(RST_GPIO_PIN, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	msleep(10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	am300_wait_event(par);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) err_req_gpio2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	while (--i >= DB0_GPIO_PIN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		gpio_free(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	i = ARRAY_SIZE(gpios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) err_req_gpio:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	while (--i >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		gpio_free(gpios[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	return err;
^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 int am300_init_board(struct broadsheetfb_par *par)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	return am300_init_gpio_regs(par);
^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 void am300_cleanup(struct broadsheetfb_par *par)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	free_irq(PXA_GPIO_TO_IRQ(RDY_GPIO_PIN), par);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	for (i = 0; i < ARRAY_SIZE(gpios); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		gpio_free(gpios[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	for (i = DB0_GPIO_PIN; i <= DB15_GPIO_PIN; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		gpio_free(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static u16 am300_get_hdb(struct broadsheetfb_par *par)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	u16 res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	for (i = 0; i <= (DB15_GPIO_PIN - DB0_GPIO_PIN) ; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		res |= (gpio_get_value(DB0_GPIO_PIN + i)) ? (1 << i) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) static void am300_set_hdb(struct broadsheetfb_par *par, u16 data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	for (i = 0; i <= (DB15_GPIO_PIN - DB0_GPIO_PIN) ; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		gpio_set_value(DB0_GPIO_PIN + i, (data >> i) & 0x01);
^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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static void am300_set_ctl(struct broadsheetfb_par *par, unsigned char bit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 				u8 state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	switch (bit) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	case BS_CS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		gpio_set_value(CS_GPIO_PIN, state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	case BS_DC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		gpio_set_value(DC_GPIO_PIN, state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	case BS_WR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		gpio_set_value(WR_GPIO_PIN, state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) static int am300_get_panel_type(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	return panel_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static irqreturn_t am300_handle_irq(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	struct broadsheetfb_par *par = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	wake_up(&par->waitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static int am300_setup_irq(struct fb_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	struct broadsheetfb_par *par = info->par;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	ret = request_irq(PXA_GPIO_TO_IRQ(RDY_GPIO_PIN), am300_handle_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 				IRQF_TRIGGER_RISING, "AM300", par);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		dev_err(&am300_device->dev, "request_irq failed: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) static struct broadsheet_board am300_board = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	.owner			= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	.init			= am300_init_board,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	.cleanup		= am300_cleanup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	.set_hdb		= am300_set_hdb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	.get_hdb		= am300_get_hdb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	.set_ctl		= am300_set_ctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	.wait_for_rdy		= am300_wait_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	.get_panel_type		= am300_get_panel_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	.setup_irq		= am300_setup_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) int __init am300_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	pxa2xx_mfp_config(ARRAY_AND_SIZE(am300_pin_config));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	/* request our platform independent driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	request_module("broadsheetfb");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	am300_device = platform_device_alloc("broadsheetfb", -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	if (!am300_device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	/* the am300_board that will be seen by broadsheetfb is a copy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	platform_device_add_data(am300_device, &am300_board,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 					sizeof(am300_board));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	ret = platform_device_add(am300_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		platform_device_put(am300_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	return 0;
^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) module_param(panel_type, uint, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) MODULE_PARM_DESC(panel_type, "Select the panel type: 37, 6, 97");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) MODULE_DESCRIPTION("board driver for am300 epd kit");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) MODULE_AUTHOR("Jaya Kumar");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) MODULE_LICENSE("GPL");