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/i2c.h> 24#include <linux/i2c-gpio.h> 25#include <linux/fb.h> 26 27#include <linux/mtd/partitions.h> 28#include <linux/mtd/nand.h> 29 30#include <mach/hardware.h> 31#include <linux/platform_data/video-ep93xx.h> 32#include <mach/gpio-ep93xx.h> 33 34#include <asm/mach-types.h> 35#include <asm/mach/arch.h> 36 37#include "soc.h" 38 39#define SNAPPERCL15_NAND_BASE (EP93XX_CS7_PHYS_BASE + SZ_16M) 40 41#define SNAPPERCL15_NAND_WPN (1 << 8) /* Write protect (active low) */ 42#define SNAPPERCL15_NAND_ALE (1 << 9) /* Address latch */ 43#define SNAPPERCL15_NAND_CLE (1 << 10) /* Command latch */ 44#define SNAPPERCL15_NAND_CEN (1 << 11) /* Chip enable (active low) */ 45#define SNAPPERCL15_NAND_RDY (1 << 14) /* Device ready */ 46 47#define NAND_CTRL_ADDR(chip) (chip->IO_ADDR_W + 0x40) 48 49static void snappercl15_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, 50 unsigned int ctrl) 51{ 52 struct nand_chip *chip = mtd->priv; 53 static u16 nand_state = SNAPPERCL15_NAND_WPN; 54 u16 set; 55 56 if (ctrl & NAND_CTRL_CHANGE) { 57 set = SNAPPERCL15_NAND_CEN | SNAPPERCL15_NAND_WPN; 58 59 if (ctrl & NAND_NCE) 60 set &= ~SNAPPERCL15_NAND_CEN; 61 if (ctrl & NAND_CLE) 62 set |= SNAPPERCL15_NAND_CLE; 63 if (ctrl & NAND_ALE) 64 set |= SNAPPERCL15_NAND_ALE; 65 66 nand_state &= ~(SNAPPERCL15_NAND_CEN | 67 SNAPPERCL15_NAND_CLE | 68 SNAPPERCL15_NAND_ALE); 69 nand_state |= set; 70 __raw_writew(nand_state, NAND_CTRL_ADDR(chip)); 71 } 72 73 if (cmd != NAND_CMD_NONE) 74 __raw_writew((cmd & 0xff) | nand_state, chip->IO_ADDR_W); 75} 76 77static int snappercl15_nand_dev_ready(struct mtd_info *mtd) 78{ 79 struct nand_chip *chip = mtd->priv; 80 81 return !!(__raw_readw(NAND_CTRL_ADDR(chip)) & SNAPPERCL15_NAND_RDY); 82} 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 .partitions = snappercl15_nand_parts, 101 .nr_partitions = ARRAY_SIZE(snappercl15_nand_parts), 102 .chip_delay = 25, 103 }, 104 .ctrl = { 105 .dev_ready = snappercl15_nand_dev_ready, 106 .cmd_ctrl = snappercl15_nand_cmd_ctrl, 107 }, 108}; 109 110static struct resource snappercl15_nand_resource[] = { 111 { 112 .start = SNAPPERCL15_NAND_BASE, 113 .end = SNAPPERCL15_NAND_BASE + SZ_4K - 1, 114 .flags = IORESOURCE_MEM, 115 }, 116}; 117 118static struct platform_device snappercl15_nand_device = { 119 .name = "gen_nand", 120 .id = -1, 121 .dev.platform_data = &snappercl15_nand_data, 122 .resource = snappercl15_nand_resource, 123 .num_resources = ARRAY_SIZE(snappercl15_nand_resource), 124}; 125 126static struct ep93xx_eth_data __initdata snappercl15_eth_data = { 127 .phy_id = 1, 128}; 129 130static struct i2c_gpio_platform_data __initdata snappercl15_i2c_gpio_data = { 131 .sda_pin = EP93XX_GPIO_LINE_EEDAT, 132 .sda_is_open_drain = 0, 133 .scl_pin = EP93XX_GPIO_LINE_EECLK, 134 .scl_is_open_drain = 0, 135 .udelay = 0, 136 .timeout = 0, 137}; 138 139static struct i2c_board_info __initdata snappercl15_i2c_data[] = { 140 { 141 /* Audio codec */ 142 I2C_BOARD_INFO("tlv320aic23", 0x1a), 143 }, 144}; 145 146static struct ep93xxfb_mach_info __initdata snappercl15_fb_info = { 147}; 148 149static struct platform_device snappercl15_audio_device = { 150 .name = "snappercl15-audio", 151 .id = -1, 152}; 153 154static void __init snappercl15_register_audio(void) 155{ 156 ep93xx_register_i2s(); 157 platform_device_register(&snappercl15_audio_device); 158} 159 160static void __init snappercl15_init_machine(void) 161{ 162 ep93xx_init_devices(); 163 ep93xx_register_eth(&snappercl15_eth_data, 1); 164 ep93xx_register_i2c(&snappercl15_i2c_gpio_data, snappercl15_i2c_data, 165 ARRAY_SIZE(snappercl15_i2c_data)); 166 ep93xx_register_fb(&snappercl15_fb_info); 167 snappercl15_register_audio(); 168 platform_device_register(&snappercl15_nand_device); 169} 170 171MACHINE_START(SNAPPER_CL15, "Bluewater Systems Snapper CL15") 172 /* Maintainer: Ryan Mallon */ 173 .atag_offset = 0x100, 174 .map_io = ep93xx_map_io, 175 .init_irq = ep93xx_init_irq, 176 .init_time = ep93xx_timer_init, 177 .init_machine = snappercl15_init_machine, 178 .init_late = ep93xx_init_late, 179 .restart = ep93xx_restart, 180MACHINE_END 181