Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 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 | |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 9 | #include <linux/kernel.h> |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 10 | #include <linux/delay.h> |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 11 | |
| 12 | #include <asm/io.h> |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 13 | #include <asm/prom.h> |
| 14 | #include <asm/macio.h> |
| 15 | #include <asm/pmac_feature.h> |
| 16 | #include <asm/pmac_pfunc.h> |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 17 | #include <asm/keylargo.h> |
| 18 | |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 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 | |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 29 | (*c)->macio = dev->bus->chip; |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 30 | return 0; |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 31 | } |
| 32 | |
| 33 | void i2sbus_control_destroy(struct i2sbus_control *c) |
| 34 | { |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 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 }; |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 86 | struct macio_chip *macio = c->macio; |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 87 | |
| 88 | if (i2sdev->enable) |
| 89 | return pmf_call_one(i2sdev->enable, &args); |
| 90 | |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 91 | if (macio == NULL || macio->base == NULL) |
| 92 | return -ENODEV; |
| 93 | |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 94 | switch (i2sdev->bus_number) { |
| 95 | case 0: |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 96 | /* these need to be locked or done through |
| 97 | * newly created feature calls! */ |
| 98 | MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_ENABLE); |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 99 | break; |
| 100 | case 1: |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 101 | MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_ENABLE); |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 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 }; |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 114 | struct macio_chip *macio = c->macio; |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 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 | } |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 129 | |
| 130 | if (macio == NULL || macio->base == NULL) |
| 131 | return -ENODEV; |
| 132 | |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 133 | switch (i2sdev->bus_number) { |
| 134 | case 0: |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 135 | if (enable) |
| 136 | MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_CELL_ENABLE); |
| 137 | else |
| 138 | MACIO_BIC(KEYLARGO_FCR1, KL1_I2S0_CELL_ENABLE); |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 139 | break; |
| 140 | case 1: |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 141 | if (enable) |
| 142 | MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_CELL_ENABLE); |
| 143 | else |
| 144 | MACIO_BIC(KEYLARGO_FCR1, KL1_I2S1_CELL_ENABLE); |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 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 }; |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 157 | struct macio_chip *macio = c->macio; |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 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 | } |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 172 | |
| 173 | if (macio == NULL || macio->base == NULL) |
| 174 | return -ENODEV; |
| 175 | |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 176 | switch (i2sdev->bus_number) { |
| 177 | case 0: |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 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); |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 182 | break; |
| 183 | case 1: |
Benjamin Herrenschmidt | 977c602 | 2006-07-10 04:44:36 -0700 | [diff] [blame] | 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); |
Johannes Berg | f3d9478 | 2006-06-21 15:42:43 +0200 | [diff] [blame] | 188 | break; |
| 189 | default: |
| 190 | return -ENODEV; |
| 191 | } |
| 192 | return 0; |
| 193 | } |