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
snappercl15_nand_cmd_ctrl(struct mtd_info * mtd,int cmd,unsigned int ctrl)49 static 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
snappercl15_nand_dev_ready(struct mtd_info * mtd)77 static 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
84 static 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
97 static 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
110 static 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
118 static 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
126 static struct ep93xx_eth_data __initdata snappercl15_eth_data = {
127 .phy_id = 1,
128 };
129
130 static 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
139 static struct i2c_board_info __initdata snappercl15_i2c_data[] = {
140 {
141 /* Audio codec */
142 I2C_BOARD_INFO("tlv320aic23", 0x1a),
143 },
144 };
145
146 static struct ep93xxfb_mach_info __initdata snappercl15_fb_info = {
147 };
148
149 static struct platform_device snappercl15_audio_device = {
150 .name = "snappercl15-audio",
151 .id = -1,
152 };
153
snappercl15_register_audio(void)154 static void __init snappercl15_register_audio(void)
155 {
156 ep93xx_register_i2s();
157 platform_device_register(&snappercl15_audio_device);
158 }
159
snappercl15_init_machine(void)160 static 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
171 MACHINE_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,
180 MACHINE_END
181