1/*
  2 * arch/arm/mach-ep93xx/snappercl15.c
  3 * Bluewater Systems Snapper CL15 system module
  4 *
  5 * Copyright (C) 2009 Bluewater Systems Ltd
  6 * Author: Ryan Mallon
  7 *
  8 * NAND code adapted from driver by:
  9 *   Andre Renaud <andre@bluewatersys.com>
 10 *   James R. McKaskill
 11 *
 12 * This program is free software; you can redistribute it and/or modify
 13 * it under the terms of the GNU General Public License as published by
 14 * the Free Software Foundation; either version 2 of the License, or (at
 15 * your option) any later version.
 16 *
 17 */
 18
 19#include <linux/platform_device.h>
 20#include <linux/kernel.h>
 21#include <linux/init.h>
 22#include <linux/io.h>
 23#include <linux/gpio.h>
 24#include <linux/i2c.h>
 25#include <linux/i2c-gpio.h>
 26#include <linux/fb.h>
 27
 28#include <linux/mtd/partitions.h>
 29#include <linux/mtd/nand.h>
 30
 31#include <mach/hardware.h>
 32#include <mach/fb.h>
 33
 34#include <asm/mach-types.h>
 35#include <asm/mach/arch.h>
 36
 37#define SNAPPERCL15_NAND_BASE	(EP93XX_CS7_PHYS_BASE + SZ_16M)
 38
 39#define SNAPPERCL15_NAND_WPN	(1 << 8)  /* Write protect (active low) */
 40#define SNAPPERCL15_NAND_ALE	(1 << 9)  /* Address latch */
 41#define SNAPPERCL15_NAND_CLE	(1 << 10) /* Command latch */
 42#define SNAPPERCL15_NAND_CEN	(1 << 11) /* Chip enable (active low) */
 43#define SNAPPERCL15_NAND_RDY	(1 << 14) /* Device ready */
 44
 45#define NAND_CTRL_ADDR(chip) 	(chip->IO_ADDR_W + 0x40)
 46
 47static void snappercl15_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
 48				      unsigned int ctrl)
 49{
 50	struct nand_chip *chip = mtd->priv;
 51	static u16 nand_state = SNAPPERCL15_NAND_WPN;
 52	u16 set;
 53
 54	if (ctrl & NAND_CTRL_CHANGE) {
 55		set = SNAPPERCL15_NAND_CEN | SNAPPERCL15_NAND_WPN;
 56
 57		if (ctrl & NAND_NCE)
 58			set &= ~SNAPPERCL15_NAND_CEN;
 59		if (ctrl & NAND_CLE)
 60			set |= SNAPPERCL15_NAND_CLE;
 61		if (ctrl & NAND_ALE)
 62			set |= SNAPPERCL15_NAND_ALE;
 63
 64		nand_state &= ~(SNAPPERCL15_NAND_CEN |
 65				SNAPPERCL15_NAND_CLE |
 66				SNAPPERCL15_NAND_ALE);
 67		nand_state |= set;
 68		__raw_writew(nand_state, NAND_CTRL_ADDR(chip));
 69	}
 70
 71	if (cmd != NAND_CMD_NONE)
 72		__raw_writew((cmd & 0xff) | nand_state, chip->IO_ADDR_W);
 73}
 74
 75static int snappercl15_nand_dev_ready(struct mtd_info *mtd)
 76{
 77	struct nand_chip *chip = mtd->priv;
 78
 79	return !!(__raw_readw(NAND_CTRL_ADDR(chip)) & SNAPPERCL15_NAND_RDY);
 80}
 81
 82static const char *snappercl15_nand_part_probes[] = {"cmdlinepart", NULL};
 83
 84static struct mtd_partition snappercl15_nand_parts[] = {
 85	{
 86		.name		= "Kernel",
 87		.offset		= 0,
 88		.size		= SZ_2M,
 89	},
 90	{
 91		.name		= "Filesystem",
 92		.offset		= MTDPART_OFS_APPEND,
 93		.size		= MTDPART_SIZ_FULL,
 94	},
 95};
 96
 97static struct platform_nand_data snappercl15_nand_data = {
 98	.chip = {
 99		.nr_chips		= 1,
100		.part_probe_types	= snappercl15_nand_part_probes,
101		.partitions		= snappercl15_nand_parts,
102		.nr_partitions		= ARRAY_SIZE(snappercl15_nand_parts),
103		.options		= NAND_NO_AUTOINCR,
104		.chip_delay		= 25,
105	},
106	.ctrl = {
107		.dev_ready		= snappercl15_nand_dev_ready,
108		.cmd_ctrl		= snappercl15_nand_cmd_ctrl,
109	},
110};
111
112static struct resource snappercl15_nand_resource[] = {
113	{
114		.start		= SNAPPERCL15_NAND_BASE,
115		.end		= SNAPPERCL15_NAND_BASE + SZ_4K - 1,
116		.flags		= IORESOURCE_MEM,
117	},
118};
119
120static struct platform_device snappercl15_nand_device = {
121	.name			= "gen_nand",
122	.id			= -1,
123	.dev.platform_data	= &snappercl15_nand_data,
124	.resource		= snappercl15_nand_resource,
125	.num_resources		= ARRAY_SIZE(snappercl15_nand_resource),
126};
127
128static struct ep93xx_eth_data __initdata snappercl15_eth_data = {
129	.phy_id			= 1,
130};
131
132static struct i2c_gpio_platform_data __initdata snappercl15_i2c_gpio_data = {
133	.sda_pin		= EP93XX_GPIO_LINE_EEDAT,
134	.sda_is_open_drain	= 0,
135	.scl_pin		= EP93XX_GPIO_LINE_EECLK,
136	.scl_is_open_drain	= 0,
137	.udelay			= 0,
138	.timeout		= 0,
139};
140
141static struct i2c_board_info __initdata snappercl15_i2c_data[] = {
142	{
143		/* Audio codec */
144		I2C_BOARD_INFO("tlv320aic23", 0x1a),
145	},
146};
147
148static struct ep93xxfb_mach_info __initdata snappercl15_fb_info = {
149	.num_modes		= EP93XXFB_USE_MODEDB,
150	.bpp			= 16,
151};
152
153static void __init snappercl15_init_machine(void)
154{
155	ep93xx_init_devices();
156	ep93xx_register_eth(&snappercl15_eth_data, 1);
157	ep93xx_register_i2c(&snappercl15_i2c_gpio_data, snappercl15_i2c_data,
158			    ARRAY_SIZE(snappercl15_i2c_data));
159	ep93xx_register_fb(&snappercl15_fb_info);
160	ep93xx_register_i2s();
161	platform_device_register(&snappercl15_nand_device);
162}
163
164MACHINE_START(SNAPPER_CL15, "Bluewater Systems Snapper CL15")
165	/* Maintainer: Ryan Mallon */
166	.boot_params	= EP93XX_SDCE0_PHYS_BASE + 0x100,
167	.map_io		= ep93xx_map_io,
168	.init_irq	= ep93xx_init_irq,
169	.timer 		= &ep93xx_timer,
170	.init_machine	= snappercl15_init_machine,
171MACHINE_END