/*
* arch/arm/mach-ep93xx/snappercl15.c
* Bluewater Systems Snapper CL15 system module
*
* Copyright (C) 2009 Bluewater Systems Ltd
* Author: Ryan Mallon <ryan@bluewatersys.com>
*
* NAND code adapted from driver by:
* Andre Renaud <andre@bluewatersys.com>
* James R. McKaskill
*
* 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.
*
*/
#include <linux/platform_device.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
#include <linux/fb.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/nand.h>
#include <mach/hardware.h>
#include <mach/fb.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#define SNAPPERCL15_NAND_BASE (EP93XX_CS7_PHYS_BASE + SZ_16M)
#define SNAPPERCL15_NAND_WPN (1 << 8) /* Write protect (active low) */
#define SNAPPERCL15_NAND_ALE (1 << 9) /* Address latch */
#define SNAPPERCL15_NAND_CLE (1 << 10) /* Command latch */
#define SNAPPERCL15_NAND_CEN (1 << 11) /* Chip enable (active low) */
#define SNAPPERCL15_NAND_RDY (1 << 14) /* Device ready */
#define NAND_CTRL_ADDR(chip) (chip->IO_ADDR_W + 0x40)
static void snappercl15_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
struct nand_chip *chip = mtd->priv;
static u16 nand_state = SNAPPERCL15_NAND_WPN;
u16 set;
if (ctrl & NAND_CTRL_CHANGE) {
set = SNAPPERCL15_NAND_CEN | SNAPPERCL15_NAND_WPN;
if (ctrl & NAND_NCE)
set &= ~SNAPPERCL15_NAND_CEN;
if (ctrl & NAND_CLE)
set |= SNAPPERCL15_NAND_CLE;
if (ctrl & NAND_ALE)
set |= SNAPPERCL15_NAND_ALE;
nand_state &= ~(SNAPPERCL15_NAND_CEN |
SNAPPERCL15_NAND_CLE |
SNAPPERCL15_NAND_ALE);
nand_state |= set;
__raw_writew(nand_state, NAND_CTRL_ADDR(chip));
}
if (cmd != NAND_CMD_NONE)
__raw_writew((cmd & 0xff) | nand_state, chip->IO_ADDR_W);
}
static int snappercl15_nand_dev_ready(struct mtd_info *mtd)
{
struct nand_chip *chip = mtd->priv;
return !!(__raw_readw(NAND_CTRL_ADDR(chip)) & SNAPPERCL15_NAND_RDY);
}
static const char *snappercl15_nand_part_probes[] = {"cmdlinepart", NULL};
static struct mtd_partition snappercl15_nand_parts[] = {
{
.name = "Kernel",
.offset = 0,
.size = SZ_2M,
},
{
.name = "Filesystem",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
},
};
static struct platform_nand_data snappercl15_nand_data = {
.chip = {
.nr_chips = 1,
.part_probe_types = snappercl15_nand_part_probes,
.partitions = snappercl15_nand_parts,
.nr_partitions = ARRAY_SIZE(snappercl15_nand_parts),
.options = NAND_NO_AUTOINCR,
.chip_delay = 25,
},
.ctrl = {
.dev_ready = snappercl15_nand_dev_ready,
.cmd_ctrl = snappercl15_nand_cmd_ctrl,
},
};
static struct resource snappercl15_nand_resource[] = {
{
.start = SNAPPERCL15_NAND_BASE,
.end = SNAPPERCL15_NAND_BASE + SZ_4K - 1,
.flags = IORESOURCE_MEM,
},
};
static struct platform_device snappercl15_nand_device = {
.name = "gen_nand",
.id = -1,
.dev.platform_data = &snappercl15_nand_data,
.resource = snappercl15_nand_resource,
.num_resources = ARRAY_SIZE(snappercl15_nand_resource),
};
static struct ep93xx_eth_data snappercl15_eth_data = {
.phy_id = 1,
};
static struct i2c_gpio_platform_data snappercl15_i2c_gpio_data = {
.sda_pin = EP93XX_GPIO_LINE_EEDAT,
.sda_is_open_drain = 0,
.scl_pin = EP93XX_GPIO_LINE_EECLK,
.scl_is_open_drain = 0,
.udelay = 0,
.timeout = 0,
};
static struct i2c_board_info __initdata snappercl15_i2c_data[] = {
{
/* Audio codec */
I2C_BOARD_INFO("tlv320aic23", 0x1a),
},
};
static struct ep93xxfb_mach_info snappercl15_fb_info = {
.num_modes = EP93XXFB_USE_MODEDB,
.bpp = 16,
};
static void __init snappercl15_init_machine(void)
{
ep93xx_init_devices();
ep93xx_register_eth(&snappercl15_eth_data, 1);
ep93xx_register_i2c(&snappercl15_i2c_gpio_data, snappercl15_i2c_data,
ARRAY_SIZE(snappercl15_i2c_data));
ep93xx_register_fb(&snappercl15_fb_info);
platform_device_register(&snappercl15_nand_device);
}
MACHINE_START(SNAPPER_CL15, "Bluewater Systems Snapper CL15")
/* Maintainer: Ryan Mallon <ryan@bluewatersys.com> */
.phys_io = EP93XX_APB_PHYS_BASE,
.io_pg_offst = ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc,
.boot_params = EP93XX_SDCE0_PHYS_BASE + 0x100,
.map_io = ep93xx_map_io,
.init_irq = ep93xx_init_irq,
.timer = &ep93xx_timer,
.init_machine = snappercl15_init_machine,
MACHINE_END
