projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 22853223 MB |
1 | /* |
| 2 | * Register map access API - AC'97 support | |
| 3 | * | |
| 4 | * Copyright 2013 Linaro Ltd. All rights reserved. | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify it | |
| 7 | * under the terms and conditions of the GNU General Public License, | |
| 8 | * version 2, as published by the Free Software Foundation. | |
| 9 | * | |
| 10 | * This program is distributed in the hope it will be useful, but WITHOUT | |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| 13 | * more details. | |
| 14 | * | |
| 15 | * You should have received a copy of the GNU General Public License | |
| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 17 | */ | |
| 18 | ||
| 19 | #include <linux/clk.h> | |
| 20 | #include <linux/err.h> | |
| 21 | #include <linux/init.h> | |
| 22 | #include <linux/io.h> | |
| 23 | #include <linux/module.h> | |
| 24 | #include <linux/regmap.h> | |
| 25 | #include <linux/slab.h> | |
| 26 | ||
| 27 | #include <sound/ac97_codec.h> | |
| 28 | ||
| 29 | bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg) | |
| 30 | { | |
| 31 | switch (reg) { | |
| 32 | case AC97_RESET: | |
| 33 | case AC97_POWERDOWN: | |
| 34 | case AC97_INT_PAGING: | |
| 35 | case AC97_EXTENDED_ID: | |
| 36 | case AC97_EXTENDED_STATUS: | |
| 37 | case AC97_EXTENDED_MID: | |
| 38 | case AC97_EXTENDED_MSTATUS: | |
| 39 | case AC97_GPIO_STATUS: | |
| 40 | case AC97_MISC_AFE: | |
| 41 | case AC97_VENDOR_ID1: | |
| 42 | case AC97_VENDOR_ID2: | |
| 43 | case AC97_CODEC_CLASS_REV: | |
| 44 | case AC97_PCI_SVID: | |
| 45 | case AC97_PCI_SID: | |
| 46 | case AC97_FUNC_SELECT: | |
| 47 | case AC97_FUNC_INFO: | |
| 48 | case AC97_SENSE_INFO: | |
| 49 | return true; | |
| 50 | default: | |
| 51 | return false; | |
| 52 | } | |
| 53 | } | |
| 54 | EXPORT_SYMBOL_GPL(regmap_ac97_default_volatile); | |
| 55 | ||
| 56 | static int regmap_ac97_reg_read(void *context, unsigned int reg, | |
| 57 | unsigned int *val) | |
| 58 | { | |
| 59 | struct snd_ac97 *ac97 = context; | |
| 60 | ||
| 61 | *val = ac97->bus->ops->read(ac97, reg); | |
| 62 | ||
| 63 | return 0; | |
| 64 | } | |
| 65 | ||
| 66 | static int regmap_ac97_reg_write(void *context, unsigned int reg, | |
| 67 | unsigned int val) | |
| 68 | { | |
| 69 | struct snd_ac97 *ac97 = context; | |
| 70 | ||
| 71 | ac97->bus->ops->write(ac97, reg, val); | |
| 72 | ||
| 73 | return 0; | |
| 74 | } | |
| 75 | ||
| 76 | static const struct regmap_bus ac97_regmap_bus = { | |
| 927db287 MB |
77 | .reg_write = regmap_ac97_reg_write, |
| 78 | .reg_read = regmap_ac97_reg_read, | |
| 22853223 MB |
79 | }; |
| 80 | ||
| 81 | /** | |
| 82 | * regmap_init_ac97(): Initialise AC'97 register map | |
| 83 | * | |
| 84 | * @ac97: Device that will be interacted with | |
| 85 | * @config: Configuration for register map | |
| 86 | * | |
| 87 | * The return value will be an ERR_PTR() on error or a valid pointer to | |
| 88 | * a struct regmap. | |
| 89 | */ | |
| 90 | struct regmap *regmap_init_ac97(struct snd_ac97 *ac97, | |
| 91 | const struct regmap_config *config) | |
| 92 | { | |
| 93 | return regmap_init(&ac97->dev, &ac97_regmap_bus, ac97, config); | |
| 94 | } | |
| 95 | EXPORT_SYMBOL_GPL(regmap_init_ac97); | |
| 96 | ||
| 97 | /** | |
| 98 | * devm_regmap_init_ac97(): Initialise AC'97 register map | |
| 99 | * | |
| 100 | * @ac97: Device that will be interacted with | |
| 101 | * @config: Configuration for register map | |
| 102 | * | |
| 103 | * The return value will be an ERR_PTR() on error or a valid pointer | |
| 104 | * to a struct regmap. The regmap will be automatically freed by the | |
| 105 | * device management code. | |
| 106 | */ | |
| 107 | struct regmap *devm_regmap_init_ac97(struct snd_ac97 *ac97, | |
| 108 | const struct regmap_config *config) | |
| 109 | { | |
| 110 | return devm_regmap_init(&ac97->dev, &ac97_regmap_bus, ac97, config); | |
| 111 | } | |
| 112 | EXPORT_SYMBOL_GPL(devm_regmap_init_ac97); | |
| 113 | ||
| 114 | MODULE_LICENSE("GPL v2"); |