Merge branch 'depends/rmk/memory_h' into next/fixes
[linux-2.6.git] / arch / arm / mach-ep93xx / snappercl15.c
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/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
47 static 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
75 static 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
82 static const char *snappercl15_nand_part_probes[] = {"cmdlinepart", NULL};
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                 .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
112 static 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
120 static 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
128 static struct ep93xx_eth_data __initdata snappercl15_eth_data = {
129         .phy_id                 = 1,
130 };
131
132 static struct i2c_gpio_platform_data __initdata 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
141 static struct i2c_board_info __initdata snappercl15_i2c_data[] = {
142         {
143                 /* Audio codec */
144                 I2C_BOARD_INFO("tlv320aic23", 0x1a),
145         },
146 };
147
148 static struct ep93xxfb_mach_info __initdata snappercl15_fb_info = {
149         .num_modes              = EP93XXFB_USE_MODEDB,
150         .bpp                    = 16,
151 };
152
153 static 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         ep93xx_register_i2s();
161         platform_device_register(&snappercl15_nand_device);
162 }
163
164 MACHINE_START(SNAPPER_CL15, "Bluewater Systems Snapper CL15")
165         /* Maintainer: Ryan Mallon */
166         .atag_offset    = 0x100,
167         .map_io         = ep93xx_map_io,
168         .init_irq       = ep93xx_init_irq,
169         .timer          = &ep93xx_timer,
170         .init_machine   = snappercl15_init_machine,
171 MACHINE_END