2 * arch/arm/mach-ep93xx/snappercl15.c
3 * Bluewater Systems Snapper CL15 system module
5 * Copyright (C) 2009 Bluewater Systems Ltd
8 * NAND code adapted from driver by:
9 * Andre Renaud <andre@bluewatersys.com>
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.
19 #include <linux/platform_device.h>
20 #include <linux/kernel.h>
21 #include <linux/init.h>
23 #include <linux/i2c.h>
26 #include <linux/mtd/platnand.h>
29 #include <linux/platform_data/video-ep93xx.h>
30 #include "gpio-ep93xx.h"
32 #include <asm/mach-types.h>
33 #include <asm/mach/arch.h>
37 #define SNAPPERCL15_NAND_BASE (EP93XX_CS7_PHYS_BASE + SZ_16M)
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 */
45 #define NAND_CTRL_ADDR(chip) (chip->legacy.IO_ADDR_W + 0x40)
47 static void snappercl15_nand_cmd_ctrl(struct nand_chip *chip, int cmd,
50 static u16 nand_state = SNAPPERCL15_NAND_WPN;
53 if (ctrl & NAND_CTRL_CHANGE) {
54 set = SNAPPERCL15_NAND_CEN | SNAPPERCL15_NAND_WPN;
57 set &= ~SNAPPERCL15_NAND_CEN;
59 set |= SNAPPERCL15_NAND_CLE;
61 set |= SNAPPERCL15_NAND_ALE;
63 nand_state &= ~(SNAPPERCL15_NAND_CEN |
64 SNAPPERCL15_NAND_CLE |
65 SNAPPERCL15_NAND_ALE);
67 __raw_writew(nand_state, NAND_CTRL_ADDR(chip));
70 if (cmd != NAND_CMD_NONE)
71 __raw_writew((cmd & 0xff) | nand_state,
72 chip->legacy.IO_ADDR_W);
75 static int snappercl15_nand_dev_ready(struct nand_chip *chip)
77 return !!(__raw_readw(NAND_CTRL_ADDR(chip)) & SNAPPERCL15_NAND_RDY);
80 static struct mtd_partition snappercl15_nand_parts[] = {
88 .offset = MTDPART_OFS_APPEND,
89 .size = MTDPART_SIZ_FULL,
93 static struct platform_nand_data snappercl15_nand_data = {
96 .partitions = snappercl15_nand_parts,
97 .nr_partitions = ARRAY_SIZE(snappercl15_nand_parts),
101 .dev_ready = snappercl15_nand_dev_ready,
102 .cmd_ctrl = snappercl15_nand_cmd_ctrl,
106 static struct resource snappercl15_nand_resource[] = {
108 .start = SNAPPERCL15_NAND_BASE,
109 .end = SNAPPERCL15_NAND_BASE + SZ_4K - 1,
110 .flags = IORESOURCE_MEM,
114 static struct platform_device snappercl15_nand_device = {
117 .dev.platform_data = &snappercl15_nand_data,
118 .resource = snappercl15_nand_resource,
119 .num_resources = ARRAY_SIZE(snappercl15_nand_resource),
122 static struct ep93xx_eth_data __initdata snappercl15_eth_data = {
126 static struct i2c_board_info __initdata snappercl15_i2c_data[] = {
129 I2C_BOARD_INFO("tlv320aic23", 0x1a),
133 static struct ep93xxfb_mach_info __initdata snappercl15_fb_info = {
136 static struct platform_device snappercl15_audio_device = {
137 .name = "snappercl15-audio",
141 static void __init snappercl15_register_audio(void)
143 ep93xx_register_i2s();
144 platform_device_register(&snappercl15_audio_device);
147 static void __init snappercl15_init_machine(void)
149 ep93xx_init_devices();
150 ep93xx_register_eth(&snappercl15_eth_data, 1);
151 ep93xx_register_i2c(snappercl15_i2c_data,
152 ARRAY_SIZE(snappercl15_i2c_data));
153 ep93xx_register_fb(&snappercl15_fb_info);
154 snappercl15_register_audio();
155 platform_device_register(&snappercl15_nand_device);
158 MACHINE_START(SNAPPER_CL15, "Bluewater Systems Snapper CL15")
159 /* Maintainer: Ryan Mallon */
160 .atag_offset = 0x100,
161 .map_io = ep93xx_map_io,
162 .init_irq = ep93xx_init_irq,
163 .init_time = ep93xx_timer_init,
164 .init_machine = snappercl15_init_machine,
165 .init_late = ep93xx_init_late,
166 .restart = ep93xx_restart,