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
|
/*
* Copyright 2011, Netlogic Microsystems.
* Copyright 2004, Matt Porter <mporter@kernel.crashing.org>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/resource.h>
#include <linux/spi/flash.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/platnand.h>
#include <asm/netlogic/haldefs.h>
#include <asm/netlogic/xlr/iomap.h>
#include <asm/netlogic/xlr/flash.h>
#include <asm/netlogic/xlr/bridge.h>
#include <asm/netlogic/xlr/gpio.h>
#include <asm/netlogic/xlr/xlr.h>
/*
* Default NOR partition layout
*/
static struct mtd_partition xlr_nor_parts[] = {
{
.name = "User FS",
.offset = 0x800000,
.size = MTDPART_SIZ_FULL,
}
};
/*
* Default NAND partition layout
*/
static struct mtd_partition xlr_nand_parts[] = {
{
.name = "Root Filesystem",
.offset = 64 * 64 * 2048,
.size = 432 * 64 * 2048,
},
{
.name = "Home Filesystem",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
},
};
/* Use PHYSMAP flash for NOR */
struct physmap_flash_data xlr_nor_data = {
.width = 2,
.parts = xlr_nor_parts,
.nr_parts = ARRAY_SIZE(xlr_nor_parts),
};
static struct resource xlr_nor_res[] = {
{
.flags = IORESOURCE_MEM,
},
};
static struct platform_device xlr_nor_dev = {
.name = "physmap-flash",
.dev = {
.platform_data = &xlr_nor_data,
},
.num_resources = ARRAY_SIZE(xlr_nor_res),
.resource = xlr_nor_res,
};
/*
* Use "gen_nand" driver for NAND flash
*
* There seems to be no way to store a private pointer containing
* platform specific info in gen_nand drivier. We will use a global
* struct for now, since we currently have only one NAND chip per board.
*/
struct xlr_nand_flash_priv {
int cs;
uint64_t flash_mmio;
};
static struct xlr_nand_flash_priv nand_priv;
static void xlr_nand_ctrl(struct nand_chip *chip, int cmd,
unsigned int ctrl)
{
if (ctrl & NAND_CLE)
nlm_write_reg(nand_priv.flash_mmio,
FLASH_NAND_CLE(nand_priv.cs), cmd);
else if (ctrl & NAND_ALE)
nlm_write_reg(nand_priv.flash_mmio,
FLASH_NAND_ALE(nand_priv.cs), cmd);
}
struct platform_nand_data xlr_nand_data = {
.chip = {
.nr_chips = 1,
.nr_partitions = ARRAY_SIZE(xlr_nand_parts),
.chip_delay = 50,
.partitions = xlr_nand_parts,
},
.ctrl = {
.cmd_ctrl = xlr_nand_ctrl,
},
};
static struct resource xlr_nand_res[] = {
{
.flags = IORESOURCE_MEM,
},
};
static struct platform_device xlr_nand_dev = {
.name = "gen_nand",
.id = -1,
.num_resources = ARRAY_SIZE(xlr_nand_res),
.resource = xlr_nand_res,
.dev = {
.platform_data = &xlr_nand_data,
}
};
/*
* XLR/XLS supports upto 8 devices on its FLASH interface. The value in
* FLASH_BAR (on the MEM/IO bridge) gives the base for mapping all the
* flash devices.
* Under this, each flash device has an offset and size given by the
* CSBASE_ADDR and CSBASE_MASK registers for the device.
*
* The CSBASE_ registers are expected to be setup by the bootloader.
*/
static void setup_flash_resource(uint64_t flash_mmio,
uint64_t flash_map_base, int cs, struct resource *res)
{
u32 base, mask;
base = nlm_read_reg(flash_mmio, FLASH_CSBASE_ADDR(cs));
mask = nlm_read_reg(flash_mmio, FLASH_CSADDR_MASK(cs));
res->start = flash_map_base + ((unsigned long)base << 16);
res->end = res->start + (mask + 1) * 64 * 1024;
}
static int __init xlr_flash_init(void)
{
uint64_t gpio_mmio, flash_mmio, flash_map_base;
u32 gpio_resetcfg, flash_bar;
int cs, boot_nand, boot_nor;
/* Flash address bits 39:24 is in bridge flash BAR */
flash_bar = nlm_read_reg(nlm_io_base, BRIDGE_FLASH_BAR);
flash_map_base = (flash_bar & 0xffff0000) << 8;
gpio_mmio = nlm_mmio_base(NETLOGIC_IO_GPIO_OFFSET);
flash_mmio = nlm_mmio_base(NETLOGIC_IO_FLASH_OFFSET);
/* Get the chip reset config */
gpio_resetcfg = nlm_read_reg(gpio_mmio, GPIO_PWRON_RESET_CFG_REG);
/* Check for boot flash type */
boot_nor = boot_nand = 0;
if (nlm_chip_is_xls()) {
/* On XLS, check boot from NAND bit (GPIO reset reg bit 16) */
if (gpio_resetcfg & (1 << 16))
boot_nand = 1;
/* check boot from PCMCIA, (GPIO reset reg bit 15 */
if ((gpio_resetcfg & (1 << 15)) == 0)
boot_nor = 1; /* not set, booted from NOR */
} else { /* XLR */
/* check boot from PCMCIA (bit 16 in GPIO reset on XLR) */
if ((gpio_resetcfg & (1 << 16)) == 0)
boot_nor = 1; /* not set, booted from NOR */
}
/* boot flash at chip select 0 */
cs = 0;
if (boot_nand) {
nand_priv.cs = cs;
nand_priv.flash_mmio = flash_mmio;
setup_flash_resource(flash_mmio, flash_map_base, cs,
xlr_nand_res);
/* Initialize NAND flash at CS 0 */
nlm_write_reg(flash_mmio, FLASH_CSDEV_PARM(cs),
FLASH_NAND_CSDEV_PARAM);
nlm_write_reg(flash_mmio, FLASH_CSTIME_PARMA(cs),
FLASH_NAND_CSTIME_PARAMA);
nlm_write_reg(flash_mmio, FLASH_CSTIME_PARMB(cs),
FLASH_NAND_CSTIME_PARAMB);
pr_info("ChipSelect %d: NAND Flash %pR\n", cs, xlr_nand_res);
return platform_device_register(&xlr_nand_dev);
}
if (boot_nor) {
setup_flash_resource(flash_mmio, flash_map_base, cs,
xlr_nor_res);
pr_info("ChipSelect %d: NOR Flash %pR\n", cs, xlr_nor_res);
return platform_device_register(&xlr_nor_dev);
}
return 0;
}
arch_initcall(xlr_flash_init);
|
