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