2 * i2sbus driver -- bus control routines
4 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
6 * GPL v2, can be found in COPYING.
9 #include <linux/kernel.h>
10 #include <linux/delay.h>
14 #include <asm/macio.h>
15 #include <asm/pmac_feature.h>
16 #include <asm/pmac_pfunc.h>
17 #include <asm/keylargo.h>
21 int i2sbus_control_init(struct macio_dev* dev, struct i2sbus_control **c)
23 *c = kzalloc(sizeof(struct i2sbus_control), GFP_KERNEL);
27 INIT_LIST_HEAD(&(*c)->list);
29 (*c)->macio = dev->bus->chip;
33 void i2sbus_control_destroy(struct i2sbus_control *c)
38 /* this is serialised externally */
39 int i2sbus_control_add_dev(struct i2sbus_control *c,
40 struct i2sbus_dev *i2sdev)
42 struct device_node *np;
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");
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 &&
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);
68 list_add(&i2sdev->item, &c->list);
73 void i2sbus_control_remove_dev(struct i2sbus_control *c,
74 struct i2sbus_dev *i2sdev)
76 /* this is serialised externally */
77 list_del(&i2sdev->item);
78 if (list_empty(&c->list))
79 i2sbus_control_destroy(c);
82 int i2sbus_control_enable(struct i2sbus_control *c,
83 struct i2sbus_dev *i2sdev)
85 struct pmf_args args = { .count = 0 };
86 struct macio_chip *macio = c->macio;
89 return pmf_call_one(i2sdev->enable, &args);
91 if (macio == NULL || macio->base == NULL)
94 switch (i2sdev->bus_number) {
96 /* these need to be locked or done through
97 * newly created feature calls! */
98 MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_ENABLE);
101 MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_ENABLE);
109 int i2sbus_control_cell(struct i2sbus_control *c,
110 struct i2sbus_dev *i2sdev,
113 struct pmf_args args = { .count = 0 };
114 struct macio_chip *macio = c->macio;
118 if (i2sdev->cell_disable)
119 return pmf_call_one(i2sdev->cell_disable, &args);
122 if (i2sdev->cell_enable)
123 return pmf_call_one(i2sdev->cell_enable, &args);
126 printk(KERN_ERR "i2sbus: INVALID CELL ENABLE VALUE\n");
130 if (macio == NULL || macio->base == NULL)
133 switch (i2sdev->bus_number) {
136 MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_CELL_ENABLE);
138 MACIO_BIC(KEYLARGO_FCR1, KL1_I2S0_CELL_ENABLE);
142 MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_CELL_ENABLE);
144 MACIO_BIC(KEYLARGO_FCR1, KL1_I2S1_CELL_ENABLE);
152 int i2sbus_control_clock(struct i2sbus_control *c,
153 struct i2sbus_dev *i2sdev,
156 struct pmf_args args = { .count = 0 };
157 struct macio_chip *macio = c->macio;
161 if (i2sdev->clock_disable)
162 return pmf_call_one(i2sdev->clock_disable, &args);
165 if (i2sdev->clock_enable)
166 return pmf_call_one(i2sdev->clock_enable, &args);
169 printk(KERN_ERR "i2sbus: INVALID CLOCK ENABLE VALUE\n");
173 if (macio == NULL || macio->base == NULL)
176 switch (i2sdev->bus_number) {
179 MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_CLK_ENABLE_BIT);
181 MACIO_BIC(KEYLARGO_FCR1, KL1_I2S0_CLK_ENABLE_BIT);
185 MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_CLK_ENABLE_BIT);
187 MACIO_BIC(KEYLARGO_FCR1, KL1_I2S1_CLK_ENABLE_BIT);