diff options
| -rw-r--r-- | drivers/base/regmap/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/base/regmap/Makefile | 1 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap-ac97.c | 114 | ||||
| -rw-r--r-- | include/linux/regmap.h | 7 |
4 files changed, 126 insertions, 1 deletions
diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig index 8a3f51f7b1b..db9d00c36a3 100644 --- a/drivers/base/regmap/Kconfig +++ b/drivers/base/regmap/Kconfig @@ -3,12 +3,15 @@ # subsystems should select the appropriate symbols. config REGMAP - default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_MMIO || REGMAP_IRQ) + default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ) select LZO_COMPRESS select LZO_DECOMPRESS select IRQ_DOMAIN if REGMAP_IRQ bool +config REGMAP_AC97 + tristate + config REGMAP_I2C tristate depends on I2C diff --git a/drivers/base/regmap/Makefile b/drivers/base/regmap/Makefile index a7c670b4123..0a533653ef3 100644 --- a/drivers/base/regmap/Makefile +++ b/drivers/base/regmap/Makefile @@ -1,6 +1,7 @@ obj-$(CONFIG_REGMAP) += regmap.o regcache.o obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-lzo.o regcache-flat.o obj-$(CONFIG_DEBUG_FS) += regmap-debugfs.o +obj-$(CONFIG_REGMAP_AC97) += regmap-ac97.o obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o obj-$(CONFIG_REGMAP_SPI) += regmap-spi.o obj-$(CONFIG_REGMAP_SPMI) += regmap-spmi.o diff --git a/drivers/base/regmap/regmap-ac97.c b/drivers/base/regmap/regmap-ac97.c new file mode 100644 index 00000000000..e4c45d2299c --- /dev/null +++ b/drivers/base/regmap/regmap-ac97.c @@ -0,0 +1,114 @@ +/* + * Register map access API - AC'97 support + * + * Copyright 2013 Linaro Ltd. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +#include <sound/ac97_codec.h> + +bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case AC97_RESET: + case AC97_POWERDOWN: + case AC97_INT_PAGING: + case AC97_EXTENDED_ID: + case AC97_EXTENDED_STATUS: + case AC97_EXTENDED_MID: + case AC97_EXTENDED_MSTATUS: + case AC97_GPIO_STATUS: + case AC97_MISC_AFE: + case AC97_VENDOR_ID1: + case AC97_VENDOR_ID2: + case AC97_CODEC_CLASS_REV: + case AC97_PCI_SVID: + case AC97_PCI_SID: + case AC97_FUNC_SELECT: + case AC97_FUNC_INFO: + case AC97_SENSE_INFO: + return true; + default: + return false; + } +} +EXPORT_SYMBOL_GPL(regmap_ac97_default_volatile); + +static int regmap_ac97_reg_read(void *context, unsigned int reg, + unsigned int *val) +{ + struct snd_ac97 *ac97 = context; + + *val = ac97->bus->ops->read(ac97, reg); + + return 0; +} + +static int regmap_ac97_reg_write(void *context, unsigned int reg, + unsigned int val) +{ + struct snd_ac97 *ac97 = context; + + ac97->bus->ops->write(ac97, reg, val); + + return 0; +} + +static const struct regmap_bus ac97_regmap_bus = { + .reg_write = regmap_ac97_reg_write, + .reg_read = regmap_ac97_reg_read, +}; + +/** + * regmap_init_ac97(): Initialise AC'97 register map + * + * @ac97: Device that will be interacted with + * @config: Configuration for register map + * + * The return value will be an ERR_PTR() on error or a valid pointer to + * a struct regmap. + */ +struct regmap *regmap_init_ac97(struct snd_ac97 *ac97, + const struct regmap_config *config) +{ + return regmap_init(&ac97->dev, &ac97_regmap_bus, ac97, config); +} +EXPORT_SYMBOL_GPL(regmap_init_ac97); + +/** + * devm_regmap_init_ac97(): Initialise AC'97 register map + * + * @ac97: Device that will be interacted with + * @config: Configuration for register map + * + * The return value will be an ERR_PTR() on error or a valid pointer + * to a struct regmap. The regmap will be automatically freed by the + * device management code. + */ +struct regmap *devm_regmap_init_ac97(struct snd_ac97 *ac97, + const struct regmap_config *config) +{ + return devm_regmap_init(&ac97->dev, &ac97_regmap_bus, ac97, config); +} +EXPORT_SYMBOL_GPL(devm_regmap_init_ac97); + +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/regmap.h b/include/linux/regmap.h index c5ed83f49c4..4419b99d8d6 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -27,6 +27,7 @@ struct spmi_device; struct regmap; struct regmap_range_cfg; struct regmap_field; +struct snd_ac97; /* An enum of all the supported cache types */ enum regcache_type { @@ -340,6 +341,8 @@ struct regmap *regmap_init_spmi_ext(struct spmi_device *dev, struct regmap *regmap_init_mmio_clk(struct device *dev, const char *clk_id, void __iomem *regs, const struct regmap_config *config); +struct regmap *regmap_init_ac97(struct snd_ac97 *ac97, + const struct regmap_config *config); struct regmap *devm_regmap_init(struct device *dev, const struct regmap_bus *bus, @@ -356,6 +359,10 @@ struct regmap *devm_regmap_init_spmi_ext(struct spmi_device *dev, struct regmap *devm_regmap_init_mmio_clk(struct device *dev, const char *clk_id, void __iomem *regs, const struct regmap_config *config); +struct regmap *devm_regmap_init_ac97(struct snd_ac97 *ac97, + const struct regmap_config *config); + +bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg); /** * regmap_init_mmio(): Initialise register map |