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
|
/*
* i2sbus driver -- bus control routines
*
* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
*
* GPL v2, can be found in COPYING.
*/
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <asm/prom.h>
#include <asm/macio.h>
#include <asm/pmac_feature.h>
#include <asm/pmac_pfunc.h>
#include <asm/keylargo.h>
#include "i2sbus.h"
int i2sbus_control_init(struct macio_dev* dev, struct i2sbus_control **c)
{
*c = kzalloc(sizeof(struct i2sbus_control), GFP_KERNEL);
if (!*c)
return -ENOMEM;
INIT_LIST_HEAD(&(*c)->list);
(*c)->macio = dev->bus->chip;
return 0;
}
void i2sbus_control_destroy(struct i2sbus_control *c)
{
kfree(c);
}
/* this is serialised externally */
int i2sbus_control_add_dev(struct i2sbus_control *c,
struct i2sbus_dev *i2sdev)
{
struct device_node *np;
np = i2sdev->sound.ofdev.dev.of_node;
i2sdev->enable = pmf_find_function(np, "enable");
i2sdev->cell_enable = pmf_find_function(np, "cell-enable");
i2sdev->clock_enable = pmf_find_function(np, "clock-enable");
i2sdev->cell_disable = pmf_find_function(np, "cell-disable");
i2sdev->clock_disable = pmf_find_function(np, "clock-disable");
/* if the bus number is not 0 or 1 we absolutely need to use
* the platform functions -- there's nothing in Darwin that
* would allow seeing a system behind what the FCRs are then,
* and I don't want to go parsing a bunch of platform functions
* by hand to try finding a system... */
if (i2sdev->bus_number != 0 && i2sdev->bus_number != 1 &&
(!i2sdev->enable ||
!i2sdev->cell_enable || !i2sdev->clock_enable ||
!i2sdev->cell_disable || !i2sdev->clock_disable)) {
pmf_put_function(i2sdev->enable);
pmf_put_function(i2sdev->cell_enable);
pmf_put_function(i2sdev->clock_enable);
pmf_put_function(i2sdev->cell_disable);
pmf_put_function(i2sdev->clock_disable);
return -ENODEV;
}
list_add(&i2sdev->item, &c->list);
return 0;
}
void i2sbus_control_remove_dev(struct i2sbus_control *c,
struct i2sbus_dev *i2sdev)
{
/* this is serialised externally */
list_del(&i2sdev->item);
if (list_empty(&c->list))
i2sbus_control_destroy(c);
}
int i2sbus_control_enable(struct i2sbus_control *c,
struct i2sbus_dev *i2sdev)
{
struct pmf_args args = { .count = 0 };
struct macio_chip *macio = c->macio;
if (i2sdev->enable)
return pmf_call_one(i2sdev->enable, &args);
if (macio == NULL || macio->base == NULL)
return -ENODEV;
switch (i2sdev->bus_number) {
case 0:
/* these need to be locked or done through
* newly created feature calls! */
MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_ENABLE);
break;
case 1:
MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_ENABLE);
break;
default:
return -ENODEV;
}
return 0;
}
int i2sbus_control_cell(struct i2sbus_control *c,
struct i2sbus_dev *i2sdev,
int enable)
{
struct pmf_args args = { .count = 0 };
struct macio_chip *macio = c->macio;
switch (enable) {
case 0:
if (i2sdev->cell_disable)
return pmf_call_one(i2sdev->cell_disable, &args);
break;
case 1:
if (i2sdev->cell_enable)
return pmf_call_one(i2sdev->cell_enable, &args);
break;
default:
printk(KERN_ERR "i2sbus: INVALID CELL ENABLE VALUE\n");
return -ENODEV;
}
if (macio == NULL || macio->base == NULL)
return -ENODEV;
switch (i2sdev->bus_number) {
case 0:
if (enable)
MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_CELL_ENABLE);
else
MACIO_BIC(KEYLARGO_FCR1, KL1_I2S0_CELL_ENABLE);
break;
case 1:
if (enable)
MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_CELL_ENABLE);
else
MACIO_BIC(KEYLARGO_FCR1, KL1_I2S1_CELL_ENABLE);
break;
default:
return -ENODEV;
}
return 0;
}
int i2sbus_control_clock(struct i2sbus_control *c,
struct i2sbus_dev *i2sdev,
int enable)
{
struct pmf_args args = { .count = 0 };
struct macio_chip *macio = c->macio;
switch (enable) {
case 0:
if (i2sdev->clock_disable)
return pmf_call_one(i2sdev->clock_disable, &args);
break;
case 1:
if (i2sdev->clock_enable)
return pmf_call_one(i2sdev->clock_enable, &args);
break;
default:
printk(KERN_ERR "i2sbus: INVALID CLOCK ENABLE VALUE\n");
return -ENODEV;
}
if (macio == NULL || macio->base == NULL)
return -ENODEV;
switch (i2sdev->bus_number) {
case 0:
if (enable)
MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_CLK_ENABLE_BIT);
else
MACIO_BIC(KEYLARGO_FCR1, KL1_I2S0_CLK_ENABLE_BIT);
break;
case 1:
if (enable)
MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_CLK_ENABLE_BIT);
else
MACIO_BIC(KEYLARGO_FCR1, KL1_I2S1_CLK_ENABLE_BIT);
break;
default:
return -ENODEV;
}
return 0;
}
|
