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
|
/*
* Renesas Technology Europe SDK7786 Support.
*
* Copyright (C) 2010 Matt Fleming
* Copyright (C) 2010 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/smsc911x.h>
#include <linux/i2c.h>
#include <linux/irq.h>
#include <linux/clk.h>
#include <mach/fpga.h>
#include <mach/irq.h>
#include <asm/machvec.h>
#include <asm/heartbeat.h>
#include <asm/sizes.h>
#include <asm/reboot.h>
static struct resource heartbeat_resource = {
.start = 0x07fff8b0,
.end = 0x07fff8b0 + sizeof(u16) - 1,
.flags = IORESOURCE_MEM | IORESOURCE_MEM_16BIT,
};
static struct platform_device heartbeat_device = {
.name = "heartbeat",
.id = -1,
.num_resources = 1,
.resource = &heartbeat_resource,
};
static struct resource smsc911x_resources[] = {
[0] = {
.name = "smsc911x-memory",
.start = 0x07ffff00,
.end = 0x07ffff00 + SZ_256 - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.name = "smsc911x-irq",
.start = evt2irq(0x2c0),
.end = evt2irq(0x2c0),
.flags = IORESOURCE_IRQ,
},
};
static struct smsc911x_platform_config smsc911x_config = {
.irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
.irq_type = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
.flags = SMSC911X_USE_32BIT,
.phy_interface = PHY_INTERFACE_MODE_MII,
};
static struct platform_device smsc911x_device = {
.name = "smsc911x",
.id = -1,
.num_resources = ARRAY_SIZE(smsc911x_resources),
.resource = smsc911x_resources,
.dev = {
.platform_data = &smsc911x_config,
},
};
static struct resource smbus_fpga_resource = {
.start = 0x07fff9e0,
.end = 0x07fff9e0 + SZ_32 - 1,
.flags = IORESOURCE_MEM,
};
static struct platform_device smbus_fpga_device = {
.name = "i2c-sdk7786",
.id = 0,
.num_resources = 1,
.resource = &smbus_fpga_resource,
};
static struct resource smbus_pcie_resource = {
.start = 0x07fffc30,
.end = 0x07fffc30 + SZ_32 - 1,
.flags = IORESOURCE_MEM,
};
static struct platform_device smbus_pcie_device = {
.name = "i2c-sdk7786",
.id = 1,
.num_resources = 1,
.resource = &smbus_pcie_resource,
};
static struct i2c_board_info __initdata sdk7786_i2c_devices[] = {
{
I2C_BOARD_INFO("max6900", 0x68),
},
};
static struct platform_device *sh7786_devices[] __initdata = {
&heartbeat_device,
&smsc911x_device,
&smbus_fpga_device,
&smbus_pcie_device,
};
static int sdk7786_i2c_setup(void)
{
unsigned int tmp;
/*
* Hand over I2C control to the FPGA.
*/
tmp = fpga_read_reg(SBCR);
tmp &= ~SCBR_I2CCEN;
tmp |= SCBR_I2CMEN;
fpga_write_reg(tmp, SBCR);
return i2c_register_board_info(0, sdk7786_i2c_devices,
ARRAY_SIZE(sdk7786_i2c_devices));
}
static int __init sdk7786_devices_setup(void)
{
int ret;
ret = platform_add_devices(sh7786_devices, ARRAY_SIZE(sh7786_devices));
if (unlikely(ret != 0))
return ret;
return sdk7786_i2c_setup();
}
__initcall(sdk7786_devices_setup);
static int sdk7786_mode_pins(void)
{
return fpga_read_reg(MODSWR);
}
static int sdk7786_clk_init(void)
{
struct clk *clk;
int ret;
/*
* Only handle the EXTAL case, anyone interfacing a crystal
* resonator will need to provide their own input clock.
*/
if (test_mode_pin(MODE_PIN9))
return -EINVAL;
clk = clk_get(NULL, "extal");
if (!clk || IS_ERR(clk))
return PTR_ERR(clk);
ret = clk_set_rate(clk, 33333333);
clk_put(clk);
return ret;
}
static void sdk7786_restart(char *cmd)
{
fpga_write_reg(0xa5a5, SRSTR);
}
static void sdk7786_power_off(void)
{
fpga_write_reg(fpga_read_reg(PWRCR) | PWRCR_PDWNREQ, PWRCR);
/*
* It can take up to 20us for the R8C to do its job, back off and
* wait a bit until we've been shut off. Even though newer FPGA
* versions don't set the ACK bit, the latency issue remains.
*/
while ((fpga_read_reg(PWRCR) & PWRCR_PDWNACK) == 0)
cpu_sleep();
}
/* Initialize the board */
static void __init sdk7786_setup(char **cmdline_p)
{
pr_info("Renesas Technology Europe SDK7786 support:\n");
sdk7786_fpga_init();
pr_info("\tPCB revision:\t%d\n", fpga_read_reg(PCBRR) & 0xf);
machine_ops.restart = sdk7786_restart;
pm_power_off = sdk7786_power_off;
}
/*
* The Machine Vector
*/
static struct sh_machine_vector mv_sdk7786 __initmv = {
.mv_name = "SDK7786",
.mv_setup = sdk7786_setup,
.mv_mode_pins = sdk7786_mode_pins,
.mv_clk_init = sdk7786_clk_init,
.mv_init_irq = sdk7786_init_irq,
};
|
