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
|
/*
* ddbridge-i2c.c: Digital Devices bridge i2c driver
*
* Copyright (C) 2010-2017 Digital Devices GmbH
* Ralph Metzler <rjkm@metzlerbros.de>
* Marcus Metzler <mocm@metzlerbros.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/io.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/timer.h>
#include <linux/i2c.h>
#include <linux/swab.h>
#include <linux/vmalloc.h>
#include "ddbridge.h"
#include "ddbridge-i2c.h"
#include "ddbridge-regs.h"
#include "ddbridge-io.h"
/******************************************************************************/
static int ddb_i2c_cmd(struct ddb_i2c *i2c, u32 adr, u32 cmd)
{
struct ddb *dev = i2c->dev;
unsigned long stat;
u32 val;
ddbwritel(dev, (adr << 9) | cmd, i2c->regs + I2C_COMMAND);
stat = wait_for_completion_timeout(&i2c->completion, HZ);
val = ddbreadl(dev, i2c->regs + I2C_COMMAND);
if (stat == 0) {
dev_err(dev->dev, "I2C timeout, card %d, port %d, link %u\n",
dev->nr, i2c->nr, i2c->link);
{
u32 istat = ddbreadl(dev, INTERRUPT_STATUS);
dev_err(dev->dev, "DDBridge IRS %08x\n", istat);
if (i2c->link) {
u32 listat = ddbreadl(dev,
DDB_LINK_TAG(i2c->link) |
INTERRUPT_STATUS);
dev_err(dev->dev, "DDBridge link %u IRS %08x\n",
i2c->link, listat);
}
if (istat & 1) {
ddbwritel(dev, istat & 1, INTERRUPT_ACK);
} else {
u32 mon = ddbreadl(dev,
i2c->regs + I2C_MONITOR);
dev_err(dev->dev, "I2C cmd=%08x mon=%08x\n",
val, mon);
}
}
return -EIO;
}
if (val & 0x70000)
return -EIO;
return 0;
}
static int ddb_i2c_master_xfer(struct i2c_adapter *adapter,
struct i2c_msg msg[], int num)
{
struct ddb_i2c *i2c = (struct ddb_i2c *)i2c_get_adapdata(adapter);
struct ddb *dev = i2c->dev;
u8 addr = 0;
addr = msg[0].addr;
if (msg[0].len > i2c->bsize)
return -EIO;
switch (num) {
case 1:
if (msg[0].flags & I2C_M_RD) {
ddbwritel(dev, msg[0].len << 16,
i2c->regs + I2C_TASKLENGTH);
if (ddb_i2c_cmd(i2c, addr, 3))
break;
ddbcpyfrom(dev, msg[0].buf,
i2c->rbuf, msg[0].len);
return num;
}
ddbcpyto(dev, i2c->wbuf, msg[0].buf, msg[0].len);
ddbwritel(dev, msg[0].len, i2c->regs + I2C_TASKLENGTH);
if (ddb_i2c_cmd(i2c, addr, 2))
break;
return num;
case 2:
if ((msg[0].flags & I2C_M_RD) == I2C_M_RD)
break;
if ((msg[1].flags & I2C_M_RD) != I2C_M_RD)
break;
if (msg[1].len > i2c->bsize)
break;
ddbcpyto(dev, i2c->wbuf, msg[0].buf, msg[0].len);
ddbwritel(dev, msg[0].len | (msg[1].len << 16),
i2c->regs + I2C_TASKLENGTH);
if (ddb_i2c_cmd(i2c, addr, 1))
break;
ddbcpyfrom(dev, msg[1].buf,
i2c->rbuf,
msg[1].len);
return num;
default:
break;
}
return -EIO;
}
static u32 ddb_i2c_functionality(struct i2c_adapter *adap)
{
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}
static const struct i2c_algorithm ddb_i2c_algo = {
.master_xfer = ddb_i2c_master_xfer,
.functionality = ddb_i2c_functionality,
};
void ddb_i2c_release(struct ddb *dev)
{
int i;
struct ddb_i2c *i2c;
for (i = 0; i < dev->i2c_num; i++) {
i2c = &dev->i2c[i];
i2c_del_adapter(&i2c->adap);
}
}
static void i2c_handler(unsigned long priv)
{
struct ddb_i2c *i2c = (struct ddb_i2c *)priv;
complete(&i2c->completion);
}
static int ddb_i2c_add(struct ddb *dev, struct ddb_i2c *i2c,
const struct ddb_regmap *regmap, int link,
int i, int num)
{
struct i2c_adapter *adap;
i2c->nr = i;
i2c->dev = dev;
i2c->link = link;
i2c->bsize = regmap->i2c_buf->size;
i2c->wbuf = DDB_LINK_TAG(link) |
(regmap->i2c_buf->base + i2c->bsize * i);
i2c->rbuf = i2c->wbuf; /* + i2c->bsize / 2 */
i2c->regs = DDB_LINK_TAG(link) |
(regmap->i2c->base + regmap->i2c->size * i);
ddbwritel(dev, I2C_SPEED_100, i2c->regs + I2C_TIMING);
ddbwritel(dev, ((i2c->rbuf & 0xffff) << 16) | (i2c->wbuf & 0xffff),
i2c->regs + I2C_TASKADDRESS);
init_completion(&i2c->completion);
adap = &i2c->adap;
i2c_set_adapdata(adap, i2c);
#ifdef I2C_ADAP_CLASS_TV_DIGITAL
adap->class = I2C_ADAP_CLASS_TV_DIGITAL | I2C_CLASS_TV_ANALOG;
#else
#ifdef I2C_CLASS_TV_ANALOG
adap->class = I2C_CLASS_TV_ANALOG;
#endif
#endif
snprintf(adap->name, I2C_NAME_SIZE, "ddbridge_%02x.%x.%x",
dev->nr, i2c->link, i);
adap->algo = &ddb_i2c_algo;
adap->algo_data = (void *)i2c;
adap->dev.parent = dev->dev;
return i2c_add_adapter(adap);
}
int ddb_i2c_init(struct ddb *dev)
{
int stat = 0;
u32 i, j, num = 0, l, base;
struct ddb_i2c *i2c;
struct i2c_adapter *adap;
const struct ddb_regmap *regmap;
for (l = 0; l < DDB_MAX_LINK; l++) {
if (!dev->link[l].info)
continue;
regmap = dev->link[l].info->regmap;
if (!regmap || !regmap->i2c)
continue;
base = regmap->irq_base_i2c;
for (i = 0; i < regmap->i2c->num; i++) {
if (!(dev->link[l].info->i2c_mask & (1 << i)))
continue;
i2c = &dev->i2c[num];
dev->handler_data[l][i + base] = (unsigned long)i2c;
dev->handler[l][i + base] = i2c_handler;
stat = ddb_i2c_add(dev, i2c, regmap, l, i, num);
if (stat)
break;
num++;
}
}
if (stat) {
for (j = 0; j < num; j++) {
i2c = &dev->i2c[j];
adap = &i2c->adap;
i2c_del_adapter(adap);
}
} else {
dev->i2c_num = num;
}
return stat;
}
|
