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f3d9478b JB |
1 | /* |
2 | * i2sbus driver -- bus control routines | |
3 | * | |
4 | * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> | |
5 | * | |
6 | * GPL v2, can be found in COPYING. | |
7 | */ | |
8 | ||
977c6023 | 9 | #include <linux/kernel.h> |
f3d9478b | 10 | #include <linux/delay.h> |
5a0e3ad6 | 11 | #include <linux/slab.h> |
977c6023 BH |
12 | |
13 | #include <asm/io.h> | |
f3d9478b JB |
14 | #include <asm/prom.h> |
15 | #include <asm/macio.h> | |
16 | #include <asm/pmac_feature.h> | |
17 | #include <asm/pmac_pfunc.h> | |
977c6023 BH |
18 | #include <asm/keylargo.h> |
19 | ||
f3d9478b JB |
20 | #include "i2sbus.h" |
21 | ||
22 | int i2sbus_control_init(struct macio_dev* dev, struct i2sbus_control **c) | |
23 | { | |
24 | *c = kzalloc(sizeof(struct i2sbus_control), GFP_KERNEL); | |
25 | if (!*c) | |
26 | return -ENOMEM; | |
27 | ||
28 | INIT_LIST_HEAD(&(*c)->list); | |
29 | ||
977c6023 | 30 | (*c)->macio = dev->bus->chip; |
f3d9478b | 31 | return 0; |
f3d9478b JB |
32 | } |
33 | ||
34 | void i2sbus_control_destroy(struct i2sbus_control *c) | |
35 | { | |
f3d9478b JB |
36 | kfree(c); |
37 | } | |
38 | ||
39 | /* this is serialised externally */ | |
40 | int i2sbus_control_add_dev(struct i2sbus_control *c, | |
41 | struct i2sbus_dev *i2sdev) | |
42 | { | |
43 | struct device_node *np; | |
44 | ||
45 | np = i2sdev->sound.ofdev.node; | |
46 | i2sdev->enable = pmf_find_function(np, "enable"); | |
47 | i2sdev->cell_enable = pmf_find_function(np, "cell-enable"); | |
48 | i2sdev->clock_enable = pmf_find_function(np, "clock-enable"); | |
49 | i2sdev->cell_disable = pmf_find_function(np, "cell-disable"); | |
50 | i2sdev->clock_disable = pmf_find_function(np, "clock-disable"); | |
51 | ||
52 | /* if the bus number is not 0 or 1 we absolutely need to use | |
53 | * the platform functions -- there's nothing in Darwin that | |
54 | * would allow seeing a system behind what the FCRs are then, | |
55 | * and I don't want to go parsing a bunch of platform functions | |
56 | * by hand to try finding a system... */ | |
57 | if (i2sdev->bus_number != 0 && i2sdev->bus_number != 1 && | |
58 | (!i2sdev->enable || | |
59 | !i2sdev->cell_enable || !i2sdev->clock_enable || | |
60 | !i2sdev->cell_disable || !i2sdev->clock_disable)) { | |
61 | pmf_put_function(i2sdev->enable); | |
62 | pmf_put_function(i2sdev->cell_enable); | |
63 | pmf_put_function(i2sdev->clock_enable); | |
64 | pmf_put_function(i2sdev->cell_disable); | |
65 | pmf_put_function(i2sdev->clock_disable); | |
66 | return -ENODEV; | |
67 | } | |
68 | ||
69 | list_add(&i2sdev->item, &c->list); | |
70 | ||
71 | return 0; | |
72 | } | |
73 | ||
74 | void i2sbus_control_remove_dev(struct i2sbus_control *c, | |
75 | struct i2sbus_dev *i2sdev) | |
76 | { | |
77 | /* this is serialised externally */ | |
78 | list_del(&i2sdev->item); | |
79 | if (list_empty(&c->list)) | |
80 | i2sbus_control_destroy(c); | |
81 | } | |
82 | ||
83 | int i2sbus_control_enable(struct i2sbus_control *c, | |
84 | struct i2sbus_dev *i2sdev) | |
85 | { | |
86 | struct pmf_args args = { .count = 0 }; | |
977c6023 | 87 | struct macio_chip *macio = c->macio; |
f3d9478b JB |
88 | |
89 | if (i2sdev->enable) | |
90 | return pmf_call_one(i2sdev->enable, &args); | |
91 | ||
977c6023 BH |
92 | if (macio == NULL || macio->base == NULL) |
93 | return -ENODEV; | |
94 | ||
f3d9478b JB |
95 | switch (i2sdev->bus_number) { |
96 | case 0: | |
977c6023 BH |
97 | /* these need to be locked or done through |
98 | * newly created feature calls! */ | |
99 | MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_ENABLE); | |
f3d9478b JB |
100 | break; |
101 | case 1: | |
977c6023 | 102 | MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_ENABLE); |
f3d9478b JB |
103 | break; |
104 | default: | |
105 | return -ENODEV; | |
106 | } | |
107 | return 0; | |
108 | } | |
109 | ||
110 | int i2sbus_control_cell(struct i2sbus_control *c, | |
111 | struct i2sbus_dev *i2sdev, | |
112 | int enable) | |
113 | { | |
114 | struct pmf_args args = { .count = 0 }; | |
977c6023 | 115 | struct macio_chip *macio = c->macio; |
f3d9478b JB |
116 | |
117 | switch (enable) { | |
118 | case 0: | |
119 | if (i2sdev->cell_disable) | |
120 | return pmf_call_one(i2sdev->cell_disable, &args); | |
121 | break; | |
122 | case 1: | |
123 | if (i2sdev->cell_enable) | |
124 | return pmf_call_one(i2sdev->cell_enable, &args); | |
125 | break; | |
126 | default: | |
127 | printk(KERN_ERR "i2sbus: INVALID CELL ENABLE VALUE\n"); | |
128 | return -ENODEV; | |
129 | } | |
977c6023 BH |
130 | |
131 | if (macio == NULL || macio->base == NULL) | |
132 | return -ENODEV; | |
133 | ||
f3d9478b JB |
134 | switch (i2sdev->bus_number) { |
135 | case 0: | |
977c6023 BH |
136 | if (enable) |
137 | MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_CELL_ENABLE); | |
138 | else | |
139 | MACIO_BIC(KEYLARGO_FCR1, KL1_I2S0_CELL_ENABLE); | |
f3d9478b JB |
140 | break; |
141 | case 1: | |
977c6023 BH |
142 | if (enable) |
143 | MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_CELL_ENABLE); | |
144 | else | |
145 | MACIO_BIC(KEYLARGO_FCR1, KL1_I2S1_CELL_ENABLE); | |
f3d9478b JB |
146 | break; |
147 | default: | |
148 | return -ENODEV; | |
149 | } | |
150 | return 0; | |
151 | } | |
152 | ||
153 | int i2sbus_control_clock(struct i2sbus_control *c, | |
154 | struct i2sbus_dev *i2sdev, | |
155 | int enable) | |
156 | { | |
157 | struct pmf_args args = { .count = 0 }; | |
977c6023 | 158 | struct macio_chip *macio = c->macio; |
f3d9478b JB |
159 | |
160 | switch (enable) { | |
161 | case 0: | |
162 | if (i2sdev->clock_disable) | |
163 | return pmf_call_one(i2sdev->clock_disable, &args); | |
164 | break; | |
165 | case 1: | |
166 | if (i2sdev->clock_enable) | |
167 | return pmf_call_one(i2sdev->clock_enable, &args); | |
168 | break; | |
169 | default: | |
170 | printk(KERN_ERR "i2sbus: INVALID CLOCK ENABLE VALUE\n"); | |
171 | return -ENODEV; | |
172 | } | |
977c6023 BH |
173 | |
174 | if (macio == NULL || macio->base == NULL) | |
175 | return -ENODEV; | |
176 | ||
f3d9478b JB |
177 | switch (i2sdev->bus_number) { |
178 | case 0: | |
977c6023 BH |
179 | if (enable) |
180 | MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_CLK_ENABLE_BIT); | |
181 | else | |
182 | MACIO_BIC(KEYLARGO_FCR1, KL1_I2S0_CLK_ENABLE_BIT); | |
f3d9478b JB |
183 | break; |
184 | case 1: | |
977c6023 BH |
185 | if (enable) |
186 | MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_CLK_ENABLE_BIT); | |
187 | else | |
188 | MACIO_BIC(KEYLARGO_FCR1, KL1_I2S1_CLK_ENABLE_BIT); | |
f3d9478b JB |
189 | break; |
190 | default: | |
191 | return -ENODEV; | |
192 | } | |
193 | return 0; | |
194 | } |