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 <ryan@bluewatersys.com> 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 <ryan@bluewatersys.com> */ 166 .phys_io = EP93XX_APB_PHYS_BASE, 167 .io_pg_offst = ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc, 168 .boot_params = EP93XX_SDCE0_PHYS_BASE + 0x100, 169 .map_io = ep93xx_map_io, 170 .init_irq = ep93xx_init_irq, 171 .timer = &ep93xx_timer, 172 .init_machine = snappercl15_init_machine, 173MACHINE_END 174