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
|
/*
* Firmware loader for ETRAX FS IO-Processor
*
* Copyright (C) 2004 Axis Communications AB
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <hwregs/reg_rdwr.h>
#include <hwregs/reg_map.h>
#include <hwregs/iop/iop_reg_space.h>
#include <hwregs/iop/iop_mpu_macros.h>
#include <hwregs/iop/iop_mpu_defs.h>
#include <hwregs/iop/iop_spu_defs.h>
#include <hwregs/iop/iop_sw_cpu_defs.h>
#define IOP_TIMEOUT 100
#error "This driver is broken with regard to its driver core usage."
#error "Please contact <greg@kroah.com> for details on how to fix it properly."
static struct device iop_spu_device[2] = {
{ .bus_id = "iop-spu0", },
{ .bus_id = "iop-spu1", },
};
static struct device iop_mpu_device = {
.bus_id = "iop-mpu",
};
static int wait_mpu_idle(void)
{
reg_iop_mpu_r_stat mpu_stat;
unsigned int timeout = IOP_TIMEOUT;
do {
mpu_stat = REG_RD(iop_mpu, regi_iop_mpu, r_stat);
} while (mpu_stat.instr_reg_busy == regk_iop_mpu_yes && --timeout > 0);
if (timeout == 0) {
printk(KERN_ERR "Timeout waiting for MPU to be idle\n");
return -EBUSY;
}
return 0;
}
int iop_fw_load_spu(const unsigned char *fw_name, unsigned int spu_inst)
{
reg_iop_sw_cpu_rw_mc_ctrl mc_ctrl = {
.wr_spu0_mem = regk_iop_sw_cpu_no,
.wr_spu1_mem = regk_iop_sw_cpu_no,
.size = 4,
.cmd = regk_iop_sw_cpu_reg_copy,
.keep_owner = regk_iop_sw_cpu_yes
};
reg_iop_spu_rw_ctrl spu_ctrl = {
.en = regk_iop_spu_no,
.fsm = regk_iop_spu_no,
};
reg_iop_sw_cpu_r_mc_stat mc_stat;
const struct firmware *fw_entry;
u32 *data;
unsigned int timeout;
int retval, i;
if (spu_inst > 1)
return -ENODEV;
/* get firmware */
retval = request_firmware(&fw_entry,
fw_name,
&iop_spu_device[spu_inst]);
if (retval != 0)
{
printk(KERN_ERR
"iop_load_spu: Failed to load firmware \"%s\"\n",
fw_name);
return retval;
}
data = (u32 *) fw_entry->data;
/* acquire ownership of memory controller */
switch (spu_inst) {
case 0:
mc_ctrl.wr_spu0_mem = regk_iop_sw_cpu_yes;
REG_WR(iop_spu, regi_iop_spu0, rw_ctrl, spu_ctrl);
break;
case 1:
mc_ctrl.wr_spu1_mem = regk_iop_sw_cpu_yes;
REG_WR(iop_spu, regi_iop_spu1, rw_ctrl, spu_ctrl);
break;
}
timeout = IOP_TIMEOUT;
do {
REG_WR(iop_sw_cpu, regi_iop_sw_cpu, rw_mc_ctrl, mc_ctrl);
mc_stat = REG_RD(iop_sw_cpu, regi_iop_sw_cpu, r_mc_stat);
} while (mc_stat.owned_by_cpu == regk_iop_sw_cpu_no && --timeout > 0);
if (timeout == 0) {
printk(KERN_ERR "Timeout waiting to acquire MC\n");
retval = -EBUSY;
goto out;
}
/* write to SPU memory */
for (i = 0; i < (fw_entry->size/4); i++) {
switch (spu_inst) {
case 0:
REG_WR_INT(iop_spu, regi_iop_spu0, rw_seq_pc, (i*4));
break;
case 1:
REG_WR_INT(iop_spu, regi_iop_spu1, rw_seq_pc, (i*4));
break;
}
REG_WR_INT(iop_sw_cpu, regi_iop_sw_cpu, rw_mc_data, *data);
data++;
}
/* release ownership of memory controller */
(void) REG_RD(iop_sw_cpu, regi_iop_sw_cpu, rs_mc_data);
out:
release_firmware(fw_entry);
return retval;
}
int iop_fw_load_mpu(unsigned char *fw_name)
{
const unsigned int start_addr = 0;
reg_iop_mpu_rw_ctrl mpu_ctrl;
const struct firmware *fw_entry;
u32 *data;
int retval, i;
/* get firmware */
retval = request_firmware(&fw_entry, fw_name, &iop_mpu_device);
if (retval != 0)
{
printk(KERN_ERR
"iop_load_spu: Failed to load firmware \"%s\"\n",
fw_name);
return retval;
}
data = (u32 *) fw_entry->data;
/* disable MPU */
mpu_ctrl.en = regk_iop_mpu_no;
REG_WR(iop_mpu, regi_iop_mpu, rw_ctrl, mpu_ctrl);
/* put start address in R0 */
REG_WR_VECT(iop_mpu, regi_iop_mpu, rw_r, 0, start_addr);
/* write to memory by executing 'SWX i, 4, R0' for each word */
if ((retval = wait_mpu_idle()) != 0)
goto out;
REG_WR(iop_mpu, regi_iop_mpu, rw_instr, MPU_SWX_IIR_INSTR(0, 4, 0));
for (i = 0; i < (fw_entry->size / 4); i++) {
REG_WR_INT(iop_mpu, regi_iop_mpu, rw_immediate, *data);
if ((retval = wait_mpu_idle()) != 0)
goto out;
data++;
}
out:
release_firmware(fw_entry);
return retval;
}
int iop_start_mpu(unsigned int start_addr)
{
reg_iop_mpu_rw_ctrl mpu_ctrl = { .en = regk_iop_mpu_yes };
int retval;
/* disable MPU */
if ((retval = wait_mpu_idle()) != 0)
goto out;
REG_WR(iop_mpu, regi_iop_mpu, rw_instr, MPU_HALT());
if ((retval = wait_mpu_idle()) != 0)
goto out;
/* set PC and wait for it to bite */
if ((retval = wait_mpu_idle()) != 0)
goto out;
REG_WR_INT(iop_mpu, regi_iop_mpu, rw_instr, MPU_BA_I(start_addr));
if ((retval = wait_mpu_idle()) != 0)
goto out;
/* make sure the MPU starts executing with interrupts disabled */
REG_WR(iop_mpu, regi_iop_mpu, rw_instr, MPU_DI());
if ((retval = wait_mpu_idle()) != 0)
goto out;
/* enable MPU */
REG_WR(iop_mpu, regi_iop_mpu, rw_ctrl, mpu_ctrl);
out:
return retval;
}
static int __init iop_fw_load_init(void)
{
#if 0
/*
* static struct devices can not be added directly to sysfs by ignoring
* the driver model infrastructure. To fix this properly, please use
* the platform_bus to register these devices to be able to properly
* use the firmware infrastructure.
*/
device_initialize(&iop_spu_device[0]);
kobject_set_name(&iop_spu_device[0].kobj, "iop-spu0");
kobject_add(&iop_spu_device[0].kobj);
device_initialize(&iop_spu_device[1]);
kobject_set_name(&iop_spu_device[1].kobj, "iop-spu1");
kobject_add(&iop_spu_device[1].kobj);
device_initialize(&iop_mpu_device);
kobject_set_name(&iop_mpu_device.kobj, "iop-mpu");
kobject_add(&iop_mpu_device.kobj);
#endif
return 0;
}
static void __exit iop_fw_load_exit(void)
{
}
module_init(iop_fw_load_init);
module_exit(iop_fw_load_exit);
MODULE_DESCRIPTION("ETRAX FS IO-Processor Firmware Loader");
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(iop_fw_load_spu);
EXPORT_SYMBOL(iop_fw_load_mpu);
EXPORT_SYMBOL(iop_start_mpu);
|
