From c1eb3a8a799e859b95725b85281c8460e6455135 Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Sat, 24 Apr 2010 17:25:23 +0200
Subject: [PATCH] Add n526 board support

---
 arch/mips/jz4740/Kconfig      |    3 +
 arch/mips/jz4740/Makefile     |    1 +
 arch/mips/jz4740/board-n526.c |  320 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 324 insertions(+), 0 deletions(-)
 create mode 100644 arch/mips/jz4740/board-n526.c

--- a/arch/mips/jz4740/Kconfig
+++ b/arch/mips/jz4740/Kconfig
@@ -9,6 +9,9 @@ config JZ4740_QI_LB60
 config JZ4740_N516
 	bool "Hanvon n516 eBook reader"
 
+config JZ4740_N526
+	bool "Hanvon n526 eBook reader"
+
 endchoice
 
 config HAVE_PWM
--- a/arch/mips/jz4740/Makefile
+++ b/arch/mips/jz4740/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_DEBUG_FS) += clock-debugfs.
 
 obj-$(CONFIG_JZ4740_QI_LB60)	+= board-qi_lb60.o
 obj-$(CONFIG_JZ4740_N516)	+= board-n516.o board-n516-display.o
+obj-$(CONFIG_JZ4740_N526)	+= board-n526.o
 
 # PM support
 
--- /dev/null
+++ b/arch/mips/jz4740/board-n526.c
@@ -0,0 +1,320 @@
+/*
+ *  Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
+ *  	N526 eBook reader support
+ *
+ *  This program is free software; you can redistribute	 it and/or modify it
+ *  under  the terms of	 the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the	License, or (at your
+ *  option) any later version.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/gpio.h>
+
+#include <linux/mutex.h>
+#include <linux/wait.h>
+#include <video/broadsheetfb.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+
+#include <linux/input.h>
+#include <linux/gpio_keys.h>
+
+#include <linux/leds.h>
+
+#include <linux/i2c.h>
+
+#include "clock.h"
+
+#include <asm/mach-jz4740/jz4740_mmc.h>
+#include <asm/mach-jz4740/jz4740_nand.h>
+#include <asm/mach-jz4740/jz4740_fb.h>
+
+#include <asm/mach-jz4740/platform.h>
+
+/* NAND */
+static struct nand_ecclayout n526_ecclayout = {
+/*	.eccbytes = 36,
+	.eccpos = {
+		6,  7,  8,  9,  10, 11, 12, 13,
+		14, 15, 16, 17, 18, 19, 20, 21,
+		22, 23, 24, 25, 26, 27, 28, 29,
+		30, 31, 32, 33, 34, 35, 36, 37,
+		38, 39, 40, 41},*/
+	.oobfree = {
+		{
+			.offset = 2,
+			.length = 4,
+		},
+		{
+			.offset = 42,
+			.length = 22,
+		},
+	}
+};
+
+static struct mtd_partition n526_partitions[] = {
+	{ .name = "NAND BOOT partition",
+	  .offset = 0 * 0x100000,
+	  .size = 4 * 0x100000,
+ 	},
+	{ .name = "NAND KERNEL partition",
+	  .offset = 4 * 0x100000,
+	  .size = 4 * 0x100000,
+ 	},
+	{ .name = "NAND ROOTFS partition",
+	  .offset = 16 * 0x100000,
+	  .size = 498 * 0x100000,
+ 	},
+};
+
+static struct jz_nand_platform_data n526_nand_pdata = {
+	.ecc_layout = &n526_ecclayout,
+	.partitions = n526_partitions,
+	.num_partitions = ARRAY_SIZE(n526_partitions),
+	.busy_gpio = JZ_GPIO_PORTC(30),
+};
+
+static struct jz4740_mmc_platform_data n526_mmc_pdata = {
+	.gpio_card_detect	= JZ_GPIO_PORTD(7),
+	.card_detect_active_low = 1,
+	.gpio_read_only		= -1,
+	.gpio_power		= JZ_GPIO_PORTD(17),
+	.power_active_low	= 1,
+};
+
+static struct gpio_led n526_leds[] = {
+	{
+		.name = "n526:blue:power",
+		.gpio = JZ_GPIO_PORTD(28),
+		.default_state = LEDS_GPIO_DEFSTATE_ON,
+	}
+};
+
+static struct gpio_led_platform_data n526_leds_pdata = {
+	.leds = n526_leds,
+	.num_leds = ARRAY_SIZE(n526_leds),
+};
+
+static struct platform_device n526_leds_device = {
+	.name = "leds-gpio",
+	.id = -1,
+	.dev = {
+		.platform_data = &n526_leds_pdata,
+	},
+};
+
+static void __init board_gpio_setup(void)
+{
+	/* We only need to enable/disable pullup here for pins used in generic
+	 * drivers. Everything else is done by the drivers themselfs. */
+	jz_gpio_disable_pullup(JZ_GPIO_PORTD(17));
+	jz_gpio_enable_pullup(JZ_GPIO_PORTD(7));
+	jz_gpio_disable_pullup(JZ_GPIO_PORTC(19));
+	jz_gpio_disable_pullup(JZ_GPIO_PORTC(20));
+	jz_gpio_disable_pullup(JZ_GPIO_PORTC(21));
+	jz_gpio_disable_pullup(JZ_GPIO_PORTC(23));
+}
+
+
+static const int n526_eink_ctrl_gpios[] = {
+	0,
+	JZ_GPIO_PORTC(23),
+	JZ_GPIO_PORTC(19),
+	JZ_GPIO_PORTC(20),
+};
+
+static void n526_eink_set_ctl(struct broadsheetfb_par * par, unsigned char ctrl, u8
+value)
+{
+	gpio_set_value(n526_eink_ctrl_gpios[ctrl], value);
+}
+
+
+static int n526_eink_wait(struct broadsheetfb_par *par)
+{
+	wait_event(par->waitq, gpio_get_value(JZ_GPIO_PORTB(17)));
+
+	return 0;
+}
+
+static u16 n526_eink_get_hdb(struct broadsheetfb_par *par)
+{
+	u16 value = 0;
+	jz_gpio_port_direction_input(JZ_GPIO_PORTC(0), 0xffff);
+	gpio_set_value(JZ_GPIO_PORTC(21), 0);
+	mdelay(100);
+
+	value = jz_gpio_port_get_value(JZ_GPIO_PORTC(0), 0xffff);
+
+	gpio_set_value(JZ_GPIO_PORTC(21), 1);
+	jz_gpio_port_direction_output(JZ_GPIO_PORTC(0), 0xffff);
+	return value;
+}
+
+static void n526_eink_set_hdb(struct broadsheetfb_par *par, u16 value)
+{
+	jz_gpio_port_set_value(JZ_GPIO_PORTC(0), value, 0xffff);
+}
+
+static int n526_eink_init(struct broadsheetfb_par *par)
+{
+	int i;
+
+	gpio_request(JZ_GPIO_PORTD(1), "display reset");
+	gpio_direction_output(JZ_GPIO_PORTD(1), 1);
+	mdelay(10);
+	gpio_set_value(JZ_GPIO_PORTD(1), 0);
+
+	gpio_request(JZ_GPIO_PORTB(18), "eink enable");
+	gpio_direction_output(JZ_GPIO_PORTB(18), 0);
+
+	gpio_request(JZ_GPIO_PORTB(29), "foobar");
+	gpio_direction_output(JZ_GPIO_PORTB(29), 1);
+
+	for(i = 1; i < ARRAY_SIZE(n526_eink_ctrl_gpios); ++i) {
+		gpio_request(n526_eink_ctrl_gpios[i], "eink display ctrl");
+		gpio_direction_output(n526_eink_ctrl_gpios[i], 0);
+	}
+
+	gpio_request(JZ_GPIO_PORTC(22), "foobar");
+	gpio_direction_input(JZ_GPIO_PORTC(22));
+	gpio_request(JZ_GPIO_PORTC(21), "eink nRD");
+	gpio_direction_output(JZ_GPIO_PORTC(21), 1);
+
+	for(i = 0; i < 16; ++i) {
+		gpio_request(JZ_GPIO_PORTC(i), "eink display data");
+	}
+	jz_gpio_port_direction_output(JZ_GPIO_PORTC(0), 0xffff);
+
+	gpio_set_value(JZ_GPIO_PORTB(18), 1);
+
+	return 0;
+}
+
+static irqreturn_t n526_eink_busy_irq(int irq, void *devid)
+{
+	struct broadsheetfb_par *par = devid;
+	wake_up(&par->waitq);
+
+	return IRQ_HANDLED;
+}
+
+static int n526_eink_setup_irq(struct fb_info *info)
+{
+	int ret;
+	struct broadsheetfb_par *par = info->par;
+
+	gpio_request(JZ_GPIO_PORTB(17), "eink busy");
+	gpio_direction_input(JZ_GPIO_PORTB(17));
+
+	ret = request_irq(gpio_to_irq(JZ_GPIO_PORTB(17)), n526_eink_busy_irq,
+				IRQF_DISABLED | IRQF_TRIGGER_RISING,
+				"eink busyline", par);
+	if (ret)
+		printk("n526 display: Failed to request busyline irq: %d\n", ret);
+	return 0;
+}
+
+static void n526_eink_cleanup(struct broadsheetfb_par *par)
+{
+}
+
+static struct broadsheet_board broadsheet_pdata = {
+	.owner = THIS_MODULE,
+	.init = n526_eink_init,
+	.wait_for_rdy = n526_eink_wait,
+	.set_ctl = n526_eink_set_ctl,
+	.set_hdb = n526_eink_set_hdb,
+	.get_hdb = n526_eink_get_hdb,
+	.cleanup = n526_eink_cleanup,
+	.setup_irq = n526_eink_setup_irq,
+};
+
+static struct platform_device n526_broadsheet_device = {
+	.name = "broadsheetfb",
+	.id = -1,
+	.dev = {
+		.platform_data = &broadsheet_pdata,
+	},
+};
+
+/* Buttons */
+static struct gpio_keys_button n526_gpio_keys_buttons[] = {
+	[0] = {
+		.code		= KEY_ENTER,
+		.gpio		= 0,
+		.active_low	= 1,
+		.desc		= "Power",
+	},
+};
+
+static struct gpio_keys_platform_data n526_gpio_keys_data = {
+	.nbuttons = ARRAY_SIZE(n526_gpio_keys_buttons),
+	.buttons = n526_gpio_keys_buttons,
+};
+
+static struct platform_device n526_gpio_keys_device = {
+	.name =	"gpio-keys",
+	.id =	-1,
+	.dev = {
+		.platform_data = &n526_gpio_keys_data,
+	}
+};
+
+static struct i2c_board_info n526_i2c_board_info = {
+	.type = "n526-lpc",
+	.addr = 0x54,
+};
+
+static struct platform_device *n526_platform_devices[] __initdata = {
+	&jz4740_usb_ohci_device,
+	&jz4740_udc_device,
+	&jz4740_mmc_device,
+	&jz4740_nand_device,
+	&jz4740_i2s_device,
+	&jz4740_codec_device,
+	&jz4740_pcm_device,
+	&jz4740_rtc_device,
+	&jz4740_i2c_device,
+	&n526_leds_device,
+	&n526_broadsheet_device,
+	&n526_gpio_keys_device,
+};
+
+static int __init n526_init_platform_devices(void)
+{
+	jz4740_nand_device.dev.platform_data = &n526_nand_pdata;
+	jz4740_mmc_device.dev.platform_data = &n526_mmc_pdata;
+
+	jz4740_serial_device_register();
+
+	n526_i2c_board_info.irq = gpio_to_irq(JZ_GPIO_PORTD(14)),
+	i2c_register_board_info(0, &n526_i2c_board_info, 1);
+
+	return platform_add_devices(n526_platform_devices,
+					ARRAY_SIZE(n526_platform_devices));
+
+}
+
+struct jz4740_clock_board_data jz4740_clock_bdata = {
+	.ext_rate = 12000000,
+	.rtc_rate = 32768,
+};
+
+static int __init n526_board_setup(void)
+{
+	board_gpio_setup();
+
+	if (n526_init_platform_devices())
+		panic("Failed to initalize platform devices\n");
+
+	return 0;
+}
+arch_initcall(n526_board_setup);