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diff --git a/arch/arm/mach-ep93xx/snappercl15.c b/arch/arm/mach-ep93xx/snappercl15.c
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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 snappercl15_eth_data = {
129 .phy_id = 1,
130};
131
132static struct i2c_gpio_platform_data 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 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 platform_device_register(&snappercl15_nand_device);
161}
162
163MACHINE_START(SNAPPER_CL15, "Bluewater Systems Snapper CL15")
164 /* Maintainer: Ryan Mallon <ryan@bluewatersys.com> */
165 .phys_io = EP93XX_APB_PHYS_BASE,
166 .io_pg_offst = ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc,
167 .boot_params = EP93XX_SDCE0_PHYS_BASE + 0x100,
168 .map_io = ep93xx_map_io,
169 .init_irq = ep93xx_init_irq,
170 .timer = &ep93xx_timer,
171 .init_machine = snappercl15_init_machine,
172MACHINE_END
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