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 <mach/fb.h>
32 #include <mach/gpio-ep93xx.h>
33
34 #include <asm/hardware/vic.h>
35 #include <asm/mach-types.h>
36 #include <asm/mach/arch.h>
37
38 #include "soc.h"
39
40 #define SNAPPERCL15_NAND_BASE (EP93XX_CS7_PHYS_BASE + SZ_16M)
41
42 #define SNAPPERCL15_NAND_WPN (1 << 8) /* Write protect (active low) */
43 #define SNAPPERCL15_NAND_ALE (1 << 9) /* Address latch */
44 #define SNAPPERCL15_NAND_CLE (1 << 10) /* Command latch */
45 #define SNAPPERCL15_NAND_CEN (1 << 11) /* Chip enable (active low) */
46 #define SNAPPERCL15_NAND_RDY (1 << 14) /* Device ready */
47
48 #define NAND_CTRL_ADDR(chip) (chip->IO_ADDR_W + 0x40)
49
snappercl15_nand_cmd_ctrl(struct mtd_info * mtd,int cmd,unsigned int ctrl)50 static void snappercl15_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
51 unsigned int ctrl)
52 {
53 struct nand_chip *chip = mtd->priv;
54 static u16 nand_state = SNAPPERCL15_NAND_WPN;
55 u16 set;
56
57 if (ctrl & NAND_CTRL_CHANGE) {
58 set = SNAPPERCL15_NAND_CEN | SNAPPERCL15_NAND_WPN;
59
60 if (ctrl & NAND_NCE)
61 set &= ~SNAPPERCL15_NAND_CEN;
62 if (ctrl & NAND_CLE)
63 set |= SNAPPERCL15_NAND_CLE;
64 if (ctrl & NAND_ALE)
65 set |= SNAPPERCL15_NAND_ALE;
66
67 nand_state &= ~(SNAPPERCL15_NAND_CEN |
68 SNAPPERCL15_NAND_CLE |
69 SNAPPERCL15_NAND_ALE);
70 nand_state |= set;
71 __raw_writew(nand_state, NAND_CTRL_ADDR(chip));
72 }
73
74 if (cmd != NAND_CMD_NONE)
75 __raw_writew((cmd & 0xff) | nand_state, chip->IO_ADDR_W);
76 }
77
snappercl15_nand_dev_ready(struct mtd_info * mtd)78 static int snappercl15_nand_dev_ready(struct mtd_info *mtd)
79 {
80 struct nand_chip *chip = mtd->priv;
81
82 return !!(__raw_readw(NAND_CTRL_ADDR(chip)) & SNAPPERCL15_NAND_RDY);
83 }
84
85 static const char *snappercl15_nand_part_probes[] = {"cmdlinepart", NULL};
86
87 static struct mtd_partition snappercl15_nand_parts[] = {
88 {
89 .name = "Kernel",
90 .offset = 0,
91 .size = SZ_2M,
92 },
93 {
94 .name = "Filesystem",
95 .offset = MTDPART_OFS_APPEND,
96 .size = MTDPART_SIZ_FULL,
97 },
98 };
99
100 static struct platform_nand_data snappercl15_nand_data = {
101 .chip = {
102 .nr_chips = 1,
103 .part_probe_types = snappercl15_nand_part_probes,
104 .partitions = snappercl15_nand_parts,
105 .nr_partitions = ARRAY_SIZE(snappercl15_nand_parts),
106 .options = NAND_NO_AUTOINCR,
107 .chip_delay = 25,
108 },
109 .ctrl = {
110 .dev_ready = snappercl15_nand_dev_ready,
111 .cmd_ctrl = snappercl15_nand_cmd_ctrl,
112 },
113 };
114
115 static struct resource snappercl15_nand_resource[] = {
116 {
117 .start = SNAPPERCL15_NAND_BASE,
118 .end = SNAPPERCL15_NAND_BASE + SZ_4K - 1,
119 .flags = IORESOURCE_MEM,
120 },
121 };
122
123 static struct platform_device snappercl15_nand_device = {
124 .name = "gen_nand",
125 .id = -1,
126 .dev.platform_data = &snappercl15_nand_data,
127 .resource = snappercl15_nand_resource,
128 .num_resources = ARRAY_SIZE(snappercl15_nand_resource),
129 };
130
131 static struct ep93xx_eth_data __initdata snappercl15_eth_data = {
132 .phy_id = 1,
133 };
134
135 static struct i2c_gpio_platform_data __initdata snappercl15_i2c_gpio_data = {
136 .sda_pin = EP93XX_GPIO_LINE_EEDAT,
137 .sda_is_open_drain = 0,
138 .scl_pin = EP93XX_GPIO_LINE_EECLK,
139 .scl_is_open_drain = 0,
140 .udelay = 0,
141 .timeout = 0,
142 };
143
144 static struct i2c_board_info __initdata snappercl15_i2c_data[] = {
145 {
146 /* Audio codec */
147 I2C_BOARD_INFO("tlv320aic23", 0x1a),
148 },
149 };
150
151 static struct ep93xxfb_mach_info __initdata snappercl15_fb_info = {
152 .num_modes = EP93XXFB_USE_MODEDB,
153 .bpp = 16,
154 };
155
156 static struct platform_device snappercl15_audio_device = {
157 .name = "snappercl15-audio",
158 .id = -1,
159 };
160
snappercl15_register_audio(void)161 static void __init snappercl15_register_audio(void)
162 {
163 ep93xx_register_i2s();
164 platform_device_register(&snappercl15_audio_device);
165 }
166
snappercl15_init_machine(void)167 static void __init snappercl15_init_machine(void)
168 {
169 ep93xx_init_devices();
170 ep93xx_register_eth(&snappercl15_eth_data, 1);
171 ep93xx_register_i2c(&snappercl15_i2c_gpio_data, snappercl15_i2c_data,
172 ARRAY_SIZE(snappercl15_i2c_data));
173 ep93xx_register_fb(&snappercl15_fb_info);
174 snappercl15_register_audio();
175 platform_device_register(&snappercl15_nand_device);
176 }
177
178 MACHINE_START(SNAPPER_CL15, "Bluewater Systems Snapper CL15")
179 /* Maintainer: Ryan Mallon */
180 .atag_offset = 0x100,
181 .map_io = ep93xx_map_io,
182 .init_irq = ep93xx_init_irq,
183 .handle_irq = vic_handle_irq,
184 .timer = &ep93xx_timer,
185 .init_machine = snappercl15_init_machine,
186 .restart = ep93xx_restart,
187 MACHINE_END
188