333 lines
7.7 KiB
C
333 lines
7.7 KiB
C
/*
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* Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
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* N526 eBook reader support
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/gpio.h>
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#include <asm/mach-jz4740/platform.h>
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#include <linux/mtd/jz4740_nand.h>
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#include <linux/jz4740_fb.h>
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#include <linux/power_supply.h>
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#include <linux/mmc/jz4740_mmc.h>
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#include <video/broadsheetfb.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/input.h>
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#include <linux/gpio_keys.h>
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#include <linux/i2c.h>
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#include <linux/i2c-gpio.h>
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#include "clock.h"
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/* NAND */
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static struct nand_ecclayout n526_ecclayout = {
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.eccbytes = 36,
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.eccpos = {
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6, 7, 8, 9, 10, 11, 12, 13,
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14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29,
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30, 31, 32, 33, 34, 35, 36, 37,
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38, 39, 40, 41},
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.oobfree = {
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{.offset = 2,
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.length = 4},
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{.offset = 42,
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.length = 22}}
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};
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static struct mtd_partition n526_partitions[] = {
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{ .name = "NAND BOOT partition",
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.offset = 0 * 0x100000,
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.size = 4 * 0x100000,
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},
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{ .name = "NAND KERNEL partition",
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.offset = 4 * 0x100000,
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.size = 4 * 0x100000,
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},
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{ .name = "NAND ROOTFS partition",
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.offset = 16 * 0x100000,
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.size = 498 * 0x100000,
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},
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};
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static struct jz_nand_platform_data n526_nand_pdata = {
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.ecc_layout = &n526_ecclayout,
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.partitions = n526_partitions,
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.num_partitions = ARRAY_SIZE(n526_partitions),
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.busy_gpio = 94,
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};
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static struct jz4740_mmc_platform_data n526_mmc_pdata = {
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.gpio_card_detect = JZ_GPIO_PORTD(7),
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.card_detect_active_low = 1,
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.gpio_read_only = -1,
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.gpio_power = JZ_GPIO_PORTD(17),
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.power_active_low = 1,
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};
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static struct gpio_led n526_leds[] = {
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{
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.name = "n526:blue:power",
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.gpio = JZ_GPIO_PORTD(28),
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.default_state = LEDS_GPIO_DEFSTATE_ON,
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}
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};
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static struct gpio_led_platform_data n526_leds_pdata = {
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.leds = n526_leds,
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.num_leds = ARRAY_SIZE(n526_leds),
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};
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static struct platform_device n526_leds_device = {
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.name = "leds-gpio",
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.id = -1,
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.dev = {
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.platform_data = &n526_leds_pdata,
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},
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};
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static void __init board_gpio_setup(void)
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{
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/* We only need to enable/disable pullup here for pins used in generic
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* drivers. Everything else is done by the drivers themselfs. */
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jz_gpio_disable_pullup(JZ_GPIO_PORTD(17));
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jz_gpio_enable_pullup(JZ_GPIO_PORTD(7));
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jz_gpio_disable_pullup(JZ_GPIO_PORTC(19));
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jz_gpio_disable_pullup(JZ_GPIO_PORTC(20));
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jz_gpio_disable_pullup(JZ_GPIO_PORTC(21));
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jz_gpio_disable_pullup(JZ_GPIO_PORTC(23));
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}
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static const int n526_eink_ctrl_gpios[] = {
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0,
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JZ_GPIO_PORTC(23),
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JZ_GPIO_PORTC(19),
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JZ_GPIO_PORTC(20),
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};
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static void n526_eink_set_ctl(struct broadsheetfb_par * par, unsigned char ctrl, u8
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value)
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{
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gpio_set_value(n526_eink_ctrl_gpios[ctrl], value);
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}
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static int n526_eink_wait(struct broadsheetfb_par *par)
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{
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wait_event(par->waitq, gpio_get_value(JZ_GPIO_PORTB(17)));
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return 0;
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}
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static u16 n526_eink_get_hdb(struct broadsheetfb_par *par)
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{
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u16 value = 0;
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jz_gpio_port_direction_input(JZ_GPIO_PORTC(0), 0xffff);
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gpio_set_value(JZ_GPIO_PORTC(21), 0);
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mdelay(100);
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value = jz_gpio_port_get_value(JZ_GPIO_PORTC(0), 0xffff);
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gpio_set_value(JZ_GPIO_PORTC(21), 1);
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jz_gpio_port_direction_output(JZ_GPIO_PORTC(0), 0xffff);
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return value;
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}
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static void n526_eink_set_hdb(struct broadsheetfb_par *par, u16 value)
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{
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jz_gpio_port_set_value(JZ_GPIO_PORTC(0), value, 0xffff);
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}
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static int n526_eink_init(struct broadsheetfb_par *par)
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{
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int i;
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gpio_request(JZ_GPIO_PORTD(1), "display reset");
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gpio_direction_output(JZ_GPIO_PORTD(1), 1);
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mdelay(10);
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gpio_set_value(JZ_GPIO_PORTD(1), 0);
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gpio_request(JZ_GPIO_PORTB(18), "eink enable");
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gpio_direction_output(JZ_GPIO_PORTB(18), 0);
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gpio_request(JZ_GPIO_PORTB(29), "foobar");
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gpio_direction_output(JZ_GPIO_PORTB(29), 1);
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for(i = 1; i < ARRAY_SIZE(n526_eink_ctrl_gpios); ++i) {
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gpio_request(n526_eink_ctrl_gpios[i], "eink display ctrl");
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gpio_direction_output(n526_eink_ctrl_gpios[i], 0);
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}
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gpio_request(JZ_GPIO_PORTC(22), "foobar");
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gpio_direction_input(JZ_GPIO_PORTC(22));
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gpio_request(JZ_GPIO_PORTC(21), "eink nRD");
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gpio_direction_output(JZ_GPIO_PORTC(21), 1);
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for(i = 0; i < 16; ++i) {
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gpio_request(JZ_GPIO_PORTC(i), "eink display data");
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}
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jz_gpio_port_direction_output(JZ_GPIO_PORTC(0), 0xffff);
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gpio_set_value(JZ_GPIO_PORTB(18), 1);
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return 0;
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}
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static irqreturn_t n526_eink_busy_irq(int irq, void *devid)
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{
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struct broadsheetfb_par *par = devid;
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wake_up(&par->waitq);
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return IRQ_HANDLED;
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}
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static int n526_eink_setup_irq(struct fb_info *info)
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{
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int ret;
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struct broadsheetfb_par *par = info->par;
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gpio_request(JZ_GPIO_PORTB(17), "eink busy");
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gpio_direction_input(JZ_GPIO_PORTB(17));
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ret = request_irq(gpio_to_irq(JZ_GPIO_PORTB(17)), n526_eink_busy_irq,
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IRQF_DISABLED | IRQF_TRIGGER_RISING,
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"eink busyline", par);
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if (ret)
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printk("n526 display: Failed to request busyline irq: %d\n", ret);
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return 0;
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}
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static void n526_eink_cleanup(struct broadsheetfb_par *par)
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{
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}
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static struct broadsheet_board broadsheet_pdata = {
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.owner = THIS_MODULE,
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.init = n526_eink_init,
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.wait_for_rdy = n526_eink_wait,
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.set_ctl = n526_eink_set_ctl,
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.set_hdb = n526_eink_set_hdb,
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.get_hdb = n526_eink_get_hdb,
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.cleanup = n526_eink_cleanup,
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.setup_irq = n526_eink_setup_irq,
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};
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static struct platform_device n526_broadsheet_device = {
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.name = "broadsheetfb",
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.id = -1,
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.dev = {
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.platform_data = &broadsheet_pdata,
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},
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};
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static struct gpio_keys_button qi_lb60_gpio_keys_buttons[] = {
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[0] = {
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.code = KEY_ENTER,
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.gpio = 0,
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.active_low = 1,
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.desc = "Power",
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},
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};
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static struct gpio_keys_platform_data qi_lb60_gpio_keys_data = {
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.nbuttons = ARRAY_SIZE(qi_lb60_gpio_keys_buttons),
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.buttons = qi_lb60_gpio_keys_buttons,
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};
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static struct platform_device qi_lb60_gpio_keys = {
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.name = "gpio-keys",
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.id = -1,
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.dev = {
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.platform_data = &qi_lb60_gpio_keys_data,
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}
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};
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static struct i2c_gpio_platform_data n526_i2c_pdata = {
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.sda_pin = JZ_GPIO_PORTD(23),
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.scl_pin = JZ_GPIO_PORTD(24),
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.udelay = 2,
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.timeout = 3 * HZ,
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};
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static struct platform_device n526_i2c_device = {
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.name = "i2c-gpio",
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.id = -1,
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.dev = {
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.platform_data = &n526_i2c_pdata,
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},
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};
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static struct i2c_board_info n526_i2c_board_info = {
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.type = "n526-lpc",
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.addr = 0x54,
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};
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static struct platform_device *jz_platform_devices[] __initdata = {
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&jz4740_usb_ohci_device,
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&jz4740_usb_gdt_device,
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&jz4740_mmc_device,
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&jz4740_nand_device,
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&jz4740_i2s_device,
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&jz4740_codec_device,
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&jz4740_rtc_device,
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&n526_leds_device,
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&n526_broadsheet_device,
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&qi_lb60_gpio_keys,
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&n526_i2c_device,
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};
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static int __init n526_init_platform_devices(void)
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{
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jz4740_nand_device.dev.platform_data = &n526_nand_pdata;
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jz4740_mmc_device.dev.platform_data = &n526_mmc_pdata;
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n526_i2c_board_info.irq = gpio_to_irq(JZ_GPIO_PORTD(14)),
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i2c_register_board_info(0, &n526_i2c_board_info, 1);
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return platform_add_devices(jz_platform_devices,
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ARRAY_SIZE(jz_platform_devices));
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}
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struct jz4740_clock_board_data jz4740_clock_bdata = {
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.ext_rate = 12000000,
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.rtc_rate = 32768,
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};
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extern int jz_gpiolib_init(void);
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static int __init n526_board_setup(void)
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{
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if (jz_gpiolib_init())
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panic("Failed to initalize jz gpio\n");
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jz4740_clock_init();
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board_gpio_setup();
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if (n526_init_platform_devices())
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panic("Failed to initalize platform devices\n");
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return 0;
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}
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arch_initcall(n526_board_setup);
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