diff options
Diffstat (limited to 'drivers/base/regmap')
| -rw-r--r-- | drivers/base/regmap/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/base/regmap/Makefile | 1 | ||||
| -rw-r--r-- | drivers/base/regmap/regcache-flat.c | 2 | ||||
| -rw-r--r-- | drivers/base/regmap/regcache-lzo.c | 2 | ||||
| -rw-r--r-- | drivers/base/regmap/regcache-rbtree.c | 4 | ||||
| -rw-r--r-- | drivers/base/regmap/regcache.c | 63 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap-ac97.c | 114 |
7 files changed, 157 insertions, 34 deletions
diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig index 8a3f51f7b1b9..db9d00c36a3e 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 a7c670b4123a..0a533653ef3b 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/regcache-flat.c b/drivers/base/regmap/regcache-flat.c index d9762e41959b..0246f44ded74 100644 --- a/drivers/base/regmap/regcache-flat.c +++ b/drivers/base/regmap/regcache-flat.c @@ -10,9 +10,9 @@ * published by the Free Software Foundation. */ -#include <linux/slab.h> #include <linux/device.h> #include <linux/seq_file.h> +#include <linux/slab.h> #include "internal.h" diff --git a/drivers/base/regmap/regcache-lzo.c b/drivers/base/regmap/regcache-lzo.c index e210a6d1406a..2d53f6f138e1 100644 --- a/drivers/base/regmap/regcache-lzo.c +++ b/drivers/base/regmap/regcache-lzo.c @@ -10,9 +10,9 @@ * published by the Free Software Foundation. */ -#include <linux/slab.h> #include <linux/device.h> #include <linux/lzo.h> +#include <linux/slab.h> #include "internal.h" diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c index f3e8fe0cc650..d453a2c98ad0 100644 --- a/drivers/base/regmap/regcache-rbtree.c +++ b/drivers/base/regmap/regcache-rbtree.c @@ -10,11 +10,11 @@ * published by the Free Software Foundation. */ -#include <linux/slab.h> -#include <linux/device.h> #include <linux/debugfs.h> +#include <linux/device.h> #include <linux/rbtree.h> #include <linux/seq_file.h> +#include <linux/slab.h> #include "internal.h" diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index f1280dc356d0..f373c35f9e1d 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -10,12 +10,12 @@ * published by the Free Software Foundation. */ -#include <linux/slab.h> -#include <linux/export.h> -#include <linux/device.h> -#include <trace/events/regmap.h> #include <linux/bsearch.h> +#include <linux/device.h> +#include <linux/export.h> +#include <linux/slab.h> #include <linux/sort.h> +#include <trace/events/regmap.h> #include "internal.h" @@ -36,6 +36,23 @@ static int regcache_hw_init(struct regmap *map) if (!map->num_reg_defaults_raw) return -EINVAL; + /* calculate the size of reg_defaults */ + for (count = 0, i = 0; i < map->num_reg_defaults_raw; i++) + if (!regmap_volatile(map, i * map->reg_stride)) + count++; + + /* all registers are volatile, so just bypass */ + if (!count) { + map->cache_bypass = true; + return 0; + } + + map->num_reg_defaults = count; + map->reg_defaults = kmalloc_array(count, sizeof(struct reg_default), + GFP_KERNEL); + if (!map->reg_defaults) + return -ENOMEM; + if (!map->reg_defaults_raw) { u32 cache_bypass = map->cache_bypass; dev_warn(map->dev, "No cache defaults, reading back from HW\n"); @@ -43,40 +60,25 @@ static int regcache_hw_init(struct regmap *map) /* Bypass the cache access till data read from HW*/ map->cache_bypass = 1; tmp_buf = kmalloc(map->cache_size_raw, GFP_KERNEL); - if (!tmp_buf) - return -EINVAL; + if (!tmp_buf) { + ret = -ENOMEM; + goto err_free; + } ret = regmap_raw_read(map, 0, tmp_buf, map->num_reg_defaults_raw); map->cache_bypass = cache_bypass; - if (ret < 0) { - kfree(tmp_buf); - return ret; - } + if (ret < 0) + goto err_cache_free; + map->reg_defaults_raw = tmp_buf; map->cache_free = 1; } - /* calculate the size of reg_defaults */ - for (count = 0, i = 0; i < map->num_reg_defaults_raw; i++) { - val = regcache_get_val(map, map->reg_defaults_raw, i); - if (regmap_volatile(map, i * map->reg_stride)) - continue; - count++; - } - - map->reg_defaults = kmalloc(count * sizeof(struct reg_default), - GFP_KERNEL); - if (!map->reg_defaults) { - ret = -ENOMEM; - goto err_free; - } - /* fill the reg_defaults */ - map->num_reg_defaults = count; for (i = 0, j = 0; i < map->num_reg_defaults_raw; i++) { - val = regcache_get_val(map, map->reg_defaults_raw, i); if (regmap_volatile(map, i * map->reg_stride)) continue; + val = regcache_get_val(map, map->reg_defaults_raw, i); map->reg_defaults[j].reg = i * map->reg_stride; map->reg_defaults[j].def = val; j++; @@ -84,9 +86,10 @@ static int regcache_hw_init(struct regmap *map) return 0; +err_cache_free: + kfree(tmp_buf); err_free: - if (map->cache_free) - kfree(map->reg_defaults_raw); + kfree(map->reg_defaults); return ret; } @@ -150,6 +153,8 @@ int regcache_init(struct regmap *map, const struct regmap_config *config) ret = regcache_hw_init(map); if (ret < 0) return ret; + if (map->cache_bypass) + return 0; } if (!map->max_register) diff --git a/drivers/base/regmap/regmap-ac97.c b/drivers/base/regmap/regmap-ac97.c new file mode 100644 index 000000000000..e4c45d2299c1 --- /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"); |