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/fb.h>
25
26 #include <linux/mtd/partitions.h>
27 #include <linux/mtd/rawnand.h>
28
29 #include <mach/hardware.h>
30 #include <linux/platform_data/video-ep93xx.h>
31 #include <mach/gpio-ep93xx.h>
32
33 #include <asm/mach-types.h>
34 #include <asm/mach/arch.h>
35
36 #include "soc.h"
37
38 #define SNAPPERCL15_NAND_BASE (EP93XX_CS7_PHYS_BASE + SZ_16M)
39
40 #define SNAPPERCL15_NAND_WPN (1 << 8) /* Write protect (active low) */
41 #define SNAPPERCL15_NAND_ALE (1 << 9) /* Address latch */
42 #define SNAPPERCL15_NAND_CLE (1 << 10) /* Command latch */
43 #define SNAPPERCL15_NAND_CEN (1 << 11) /* Chip enable (active low) */
44 #define SNAPPERCL15_NAND_RDY (1 << 14) /* Device ready */
45
46 #define NAND_CTRL_ADDR(chip) (chip->IO_ADDR_W + 0x40)
47
snappercl15_nand_cmd_ctrl(struct mtd_info * mtd,int cmd,unsigned int ctrl)48 static void snappercl15_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
49 unsigned int ctrl)
50 {
51 struct nand_chip *chip = mtd_to_nand(mtd);
52 static u16 nand_state = SNAPPERCL15_NAND_WPN;
53 u16 set;
54
55 if (ctrl & NAND_CTRL_CHANGE) {
56 set = SNAPPERCL15_NAND_CEN | SNAPPERCL15_NAND_WPN;
57
58 if (ctrl & NAND_NCE)
59 set &= ~SNAPPERCL15_NAND_CEN;
60 if (ctrl & NAND_CLE)
61 set |= SNAPPERCL15_NAND_CLE;
62 if (ctrl & NAND_ALE)
63 set |= SNAPPERCL15_NAND_ALE;
64
65 nand_state &= ~(SNAPPERCL15_NAND_CEN |
66 SNAPPERCL15_NAND_CLE |
67 SNAPPERCL15_NAND_ALE);
68 nand_state |= set;
69 __raw_writew(nand_state, NAND_CTRL_ADDR(chip));
70 }
71
72 if (cmd != NAND_CMD_NONE)
73 __raw_writew((cmd & 0xff) | nand_state, chip->IO_ADDR_W);
74 }
75
snappercl15_nand_dev_ready(struct mtd_info * mtd)76 static int snappercl15_nand_dev_ready(struct mtd_info *mtd)
77 {
78 struct nand_chip *chip = mtd_to_nand(mtd);
79
80 return !!(__raw_readw(NAND_CTRL_ADDR(chip)) & SNAPPERCL15_NAND_RDY);
81 }
82
83 static struct mtd_partition snappercl15_nand_parts[] = {
84 {
85 .name = "Kernel",
86 .offset = 0,
87 .size = SZ_2M,
88 },
89 {
90 .name = "Filesystem",
91 .offset = MTDPART_OFS_APPEND,
92 .size = MTDPART_SIZ_FULL,
93 },
94 };
95
96 static struct platform_nand_data snappercl15_nand_data = {
97 .chip = {
98 .nr_chips = 1,
99 .partitions = snappercl15_nand_parts,
100 .nr_partitions = ARRAY_SIZE(snappercl15_nand_parts),
101 .chip_delay = 25,
102 },
103 .ctrl = {
104 .dev_ready = snappercl15_nand_dev_ready,
105 .cmd_ctrl = snappercl15_nand_cmd_ctrl,
106 },
107 };
108
109 static struct resource snappercl15_nand_resource[] = {
110 {
111 .start = SNAPPERCL15_NAND_BASE,
112 .end = SNAPPERCL15_NAND_BASE + SZ_4K - 1,
113 .flags = IORESOURCE_MEM,
114 },
115 };
116
117 static struct platform_device snappercl15_nand_device = {
118 .name = "gen_nand",
119 .id = -1,
120 .dev.platform_data = &snappercl15_nand_data,
121 .resource = snappercl15_nand_resource,
122 .num_resources = ARRAY_SIZE(snappercl15_nand_resource),
123 };
124
125 static struct ep93xx_eth_data __initdata snappercl15_eth_data = {
126 .phy_id = 1,
127 };
128
129 static struct i2c_board_info __initdata snappercl15_i2c_data[] = {
130 {
131 /* Audio codec */
132 I2C_BOARD_INFO("tlv320aic23", 0x1a),
133 },
134 };
135
136 static struct ep93xxfb_mach_info __initdata snappercl15_fb_info = {
137 };
138
139 static struct platform_device snappercl15_audio_device = {
140 .name = "snappercl15-audio",
141 .id = -1,
142 };
143
snappercl15_register_audio(void)144 static void __init snappercl15_register_audio(void)
145 {
146 ep93xx_register_i2s();
147 platform_device_register(&snappercl15_audio_device);
148 }
149
snappercl15_init_machine(void)150 static void __init snappercl15_init_machine(void)
151 {
152 ep93xx_init_devices();
153 ep93xx_register_eth(&snappercl15_eth_data, 1);
154 ep93xx_register_i2c(snappercl15_i2c_data,
155 ARRAY_SIZE(snappercl15_i2c_data));
156 ep93xx_register_fb(&snappercl15_fb_info);
157 snappercl15_register_audio();
158 platform_device_register(&snappercl15_nand_device);
159 }
160
161 MACHINE_START(SNAPPER_CL15, "Bluewater Systems Snapper CL15")
162 /* Maintainer: Ryan Mallon */
163 .atag_offset = 0x100,
164 .map_io = ep93xx_map_io,
165 .init_irq = ep93xx_init_irq,
166 .init_time = ep93xx_timer_init,
167 .init_machine = snappercl15_init_machine,
168 .init_late = ep93xx_init_late,
169 .restart = ep93xx_restart,
170 MACHINE_END
171