1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
|
/*
* board-flash.c
* Modified from mach-omap2/board-3430sdp-flash.c
*
* Copyright (C) 2009 Nokia Corporation
* Copyright (C) 2009 Texas Instruments
*
* Vimal Singh <vimalsingh@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/mtd/physmap.h>
#include <linux/io.h>
#include <plat/irqs.h>
#include <plat/gpmc.h>
#include <plat/nand.h>
#include <plat/onenand.h>
#include <plat/tc.h>
#include "board-flash.h"
#define REG_FPGA_REV 0x10
#define REG_FPGA_DIP_SWITCH_INPUT2 0x60
#define MAX_SUPPORTED_GPMC_CONFIG 3
#define DEBUG_BASE 0x08000000 /* debug board */
/* various memory sizes */
#define FLASH_SIZE_SDPV1 SZ_64M /* NOR flash (64 Meg aligned) */
#define FLASH_SIZE_SDPV2 SZ_128M /* NOR flash (256 Meg aligned) */
static struct physmap_flash_data board_nor_data = {
.width = 2,
};
static struct resource board_nor_resource = {
.flags = IORESOURCE_MEM,
};
static struct platform_device board_nor_device = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &board_nor_data,
},
.num_resources = 1,
.resource = &board_nor_resource,
};
static void
__init board_nor_init(struct mtd_partition *nor_parts, u8 nr_parts, u8 cs)
{
int err;
board_nor_data.parts = nor_parts;
board_nor_data.nr_parts = nr_parts;
/* Configure start address and size of NOR device */
if (omap_rev() >= OMAP3430_REV_ES1_0) {
err = gpmc_cs_request(cs, FLASH_SIZE_SDPV2 - 1,
(unsigned long *)&board_nor_resource.start);
board_nor_resource.end = board_nor_resource.start
+ FLASH_SIZE_SDPV2 - 1;
} else {
err = gpmc_cs_request(cs, FLASH_SIZE_SDPV1 - 1,
(unsigned long *)&board_nor_resource.start);
board_nor_resource.end = board_nor_resource.start
+ FLASH_SIZE_SDPV1 - 1;
}
if (err < 0) {
pr_err("NOR: Can't request GPMC CS\n");
return;
}
if (platform_device_register(&board_nor_device) < 0)
pr_err("Unable to register NOR device\n");
}
#if defined(CONFIG_MTD_ONENAND_OMAP2) || \
defined(CONFIG_MTD_ONENAND_OMAP2_MODULE)
static struct omap_onenand_platform_data board_onenand_data = {
.dma_channel = -1, /* disable DMA in OMAP OneNAND driver */
};
static void
__init board_onenand_init(struct mtd_partition *onenand_parts,
u8 nr_parts, u8 cs)
{
board_onenand_data.cs = cs;
board_onenand_data.parts = onenand_parts;
board_onenand_data.nr_parts = nr_parts;
gpmc_onenand_init(&board_onenand_data);
}
#else
static void
__init board_onenand_init(struct mtd_partition *nor_parts, u8 nr_parts, u8 cs)
{
}
#endif /* CONFIG_MTD_ONENAND_OMAP2 || CONFIG_MTD_ONENAND_OMAP2_MODULE */
#if defined(CONFIG_MTD_NAND_OMAP2) || \
defined(CONFIG_MTD_NAND_OMAP2_MODULE)
/* Note that all values in this struct are in nanoseconds */
static struct gpmc_timings nand_timings = {
.sync_clk = 0,
.cs_on = 0,
.cs_rd_off = 36,
.cs_wr_off = 36,
.adv_on = 6,
.adv_rd_off = 24,
.adv_wr_off = 36,
.we_off = 30,
.oe_off = 48,
.access = 54,
.rd_cycle = 72,
.wr_cycle = 72,
.wr_access = 30,
.wr_data_mux_bus = 0,
};
static struct omap_nand_platform_data board_nand_data = {
.nand_setup = NULL,
.gpmc_t = &nand_timings,
.dma_channel = -1, /* disable DMA in OMAP NAND driver */
.dev_ready = NULL,
.devsize = 0, /* '0' for 8-bit, '1' for 16-bit device */
};
void
__init board_nand_init(struct mtd_partition *nand_parts,
u8 nr_parts, u8 cs, int nand_type)
{
board_nand_data.cs = cs;
board_nand_data.parts = nand_parts;
board_nand_data.nr_parts = nr_parts;
board_nand_data.devsize = nand_type;
board_nand_data.ecc_opt = OMAP_ECC_HAMMING_CODE_DEFAULT;
board_nand_data.gpmc_irq = OMAP_GPMC_IRQ_BASE + cs;
gpmc_nand_init(&board_nand_data);
}
#else
void
__init board_nand_init(struct mtd_partition *nand_parts, u8 nr_parts, u8 cs)
{
}
#endif /* CONFIG_MTD_NAND_OMAP2 || CONFIG_MTD_NAND_OMAP2_MODULE */
/**
* get_gpmc0_type - Reads the FPGA DIP_SWITCH_INPUT_REGISTER2 to get
* the various cs values.
*/
static u8 get_gpmc0_type(void)
{
u8 cs = 0;
void __iomem *fpga_map_addr;
fpga_map_addr = ioremap(DEBUG_BASE, 4096);
if (!fpga_map_addr)
return -ENOMEM;
if (!(__raw_readw(fpga_map_addr + REG_FPGA_REV)))
/* we dont have an DEBUG FPGA??? */
/* Depend on #defines!! default to strata boot return param */
goto unmap;
/* S8-DIP-OFF = 1, S8-DIP-ON = 0 */
cs = __raw_readw(fpga_map_addr + REG_FPGA_DIP_SWITCH_INPUT2) & 0xf;
/* ES2.0 SDP's onwards 4 dip switches are provided for CS */
if (omap_rev() >= OMAP3430_REV_ES1_0)
/* change (S8-1:4=DS-2:0) to (S8-4:1=DS-2:0) */
cs = ((cs & 8) >> 3) | ((cs & 4) >> 1) |
((cs & 2) << 1) | ((cs & 1) << 3);
else
/* change (S8-1:3=DS-2:0) to (S8-3:1=DS-2:0) */
cs = ((cs & 4) >> 2) | (cs & 2) | ((cs & 1) << 2);
unmap:
iounmap(fpga_map_addr);
return cs;
}
/**
* board_flash_init - Identify devices connected to GPMC and register.
*
* @return - void.
*/
void board_flash_init(struct flash_partitions partition_info[],
char chip_sel_board[][GPMC_CS_NUM], int nand_type)
{
u8 cs = 0;
u8 norcs = GPMC_CS_NUM + 1;
u8 nandcs = GPMC_CS_NUM + 1;
u8 onenandcs = GPMC_CS_NUM + 1;
u8 idx;
unsigned char *config_sel = NULL;
/* REVISIT: Is this return correct idx for 2430 SDP?
* for which cs configuration matches for 2430 SDP?
*/
idx = get_gpmc0_type();
if (idx >= MAX_SUPPORTED_GPMC_CONFIG) {
pr_err("%s: Invalid chip select: %d\n", __func__, cs);
return;
}
config_sel = (unsigned char *)(chip_sel_board[idx]);
while (cs < GPMC_CS_NUM) {
switch (config_sel[cs]) {
case PDC_NOR:
if (norcs > GPMC_CS_NUM)
norcs = cs;
break;
case PDC_NAND:
if (nandcs > GPMC_CS_NUM)
nandcs = cs;
break;
case PDC_ONENAND:
if (onenandcs > GPMC_CS_NUM)
onenandcs = cs;
break;
};
cs++;
}
if (norcs > GPMC_CS_NUM)
pr_err("NOR: Unable to find configuration in GPMC\n");
else
board_nor_init(partition_info[0].parts,
partition_info[0].nr_parts, norcs);
if (onenandcs > GPMC_CS_NUM)
pr_err("OneNAND: Unable to find configuration in GPMC\n");
else
board_onenand_init(partition_info[1].parts,
partition_info[1].nr_parts, onenandcs);
if (nandcs > GPMC_CS_NUM)
pr_err("NAND: Unable to find configuration in GPMC\n");
else
board_nand_init(partition_info[2].parts,
partition_info[2].nr_parts, nandcs, nand_type);
}
|
