diff options
| -rw-r--r-- | drivers/base/regmap/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/base/regmap/Makefile | 1 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap-fsi.c | 231 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap-irq.c | 59 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap.c | 13 | ||||
| -rw-r--r-- | include/linux/regmap.h | 49 |
6 files changed, 341 insertions, 18 deletions
diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig index 159bac6c5046..cd4bb642b9de 100644 --- a/drivers/base/regmap/Kconfig +++ b/drivers/base/regmap/Kconfig @@ -4,7 +4,7 @@ # subsystems should select the appropriate symbols. config REGMAP - default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ || REGMAP_SOUNDWIRE || REGMAP_SOUNDWIRE_MBQ || REGMAP_SCCB || REGMAP_I3C || REGMAP_SPI_AVMM || REGMAP_MDIO) + default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ || REGMAP_SOUNDWIRE || REGMAP_SOUNDWIRE_MBQ || REGMAP_SCCB || REGMAP_I3C || REGMAP_SPI_AVMM || REGMAP_MDIO || REGMAP_FSI) select IRQ_DOMAIN if REGMAP_IRQ select MDIO_BUS if REGMAP_MDIO bool @@ -65,3 +65,7 @@ config REGMAP_I3C config REGMAP_SPI_AVMM tristate depends on SPI + +config REGMAP_FSI + tristate + depends on FSI diff --git a/drivers/base/regmap/Makefile b/drivers/base/regmap/Makefile index 11facb32a027..6990de7ca9a9 100644 --- a/drivers/base/regmap/Makefile +++ b/drivers/base/regmap/Makefile @@ -20,3 +20,4 @@ obj-$(CONFIG_REGMAP_SCCB) += regmap-sccb.o obj-$(CONFIG_REGMAP_I3C) += regmap-i3c.o obj-$(CONFIG_REGMAP_SPI_AVMM) += regmap-spi-avmm.o obj-$(CONFIG_REGMAP_MDIO) += regmap-mdio.o +obj-$(CONFIG_REGMAP_FSI) += regmap-fsi.o diff --git a/drivers/base/regmap/regmap-fsi.c b/drivers/base/regmap/regmap-fsi.c new file mode 100644 index 000000000000..3d2f3cb31d5e --- /dev/null +++ b/drivers/base/regmap/regmap-fsi.c @@ -0,0 +1,231 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Register map access API - FSI support +// +// Copyright 2022 IBM Corp +// +// Author: Eddie James <eajames@linux.ibm.com> + +#include <linux/fsi.h> +#include <linux/module.h> +#include <linux/regmap.h> + +#include "internal.h" + +static int regmap_fsi32_reg_read(void *context, unsigned int reg, unsigned int *val) +{ + u32 v; + int ret; + + ret = fsi_slave_read(context, reg, &v, sizeof(v)); + if (ret) + return ret; + + *val = v; + return 0; +} + +static int regmap_fsi32_reg_write(void *context, unsigned int reg, unsigned int val) +{ + u32 v = val; + + return fsi_slave_write(context, reg, &v, sizeof(v)); +} + +static const struct regmap_bus regmap_fsi32 = { + .reg_write = regmap_fsi32_reg_write, + .reg_read = regmap_fsi32_reg_read, +}; + +static int regmap_fsi32le_reg_read(void *context, unsigned int reg, unsigned int *val) +{ + __be32 v; + int ret; + + ret = fsi_slave_read(context, reg, &v, sizeof(v)); + if (ret) + return ret; + + *val = be32_to_cpu(v); + return 0; +} + +static int regmap_fsi32le_reg_write(void *context, unsigned int reg, unsigned int val) +{ + __be32 v = cpu_to_be32(val); + + return fsi_slave_write(context, reg, &v, sizeof(v)); +} + +static const struct regmap_bus regmap_fsi32le = { + .reg_write = regmap_fsi32le_reg_write, + .reg_read = regmap_fsi32le_reg_read, +}; + +static int regmap_fsi16_reg_read(void *context, unsigned int reg, unsigned int *val) +{ + u16 v; + int ret; + + ret = fsi_slave_read(context, reg, &v, sizeof(v)); + if (ret) + return ret; + + *val = v; + return 0; +} + +static int regmap_fsi16_reg_write(void *context, unsigned int reg, unsigned int val) +{ + u16 v; + + if (val > 0xffff) + return -EINVAL; + + v = val; + return fsi_slave_write(context, reg, &v, sizeof(v)); +} + +static const struct regmap_bus regmap_fsi16 = { + .reg_write = regmap_fsi16_reg_write, + .reg_read = regmap_fsi16_reg_read, +}; + +static int regmap_fsi16le_reg_read(void *context, unsigned int reg, unsigned int *val) +{ + __be16 v; + int ret; + + ret = fsi_slave_read(context, reg, &v, sizeof(v)); + if (ret) + return ret; + + *val = be16_to_cpu(v); + return 0; +} + +static int regmap_fsi16le_reg_write(void *context, unsigned int reg, unsigned int val) +{ + __be16 v; + + if (val > 0xffff) + return -EINVAL; + + v = cpu_to_be16(val); + return fsi_slave_write(context, reg, &v, sizeof(v)); +} + +static const struct regmap_bus regmap_fsi16le = { + .reg_write = regmap_fsi16le_reg_write, + .reg_read = regmap_fsi16le_reg_read, +}; + +static int regmap_fsi8_reg_read(void *context, unsigned int reg, unsigned int *val) +{ + u8 v; + int ret; + + ret = fsi_slave_read(context, reg, &v, sizeof(v)); + if (ret) + return ret; + + *val = v; + return 0; +} + +static int regmap_fsi8_reg_write(void *context, unsigned int reg, unsigned int val) +{ + u8 v; + + if (val > 0xff) + return -EINVAL; + + v = val; + return fsi_slave_write(context, reg, &v, sizeof(v)); +} + +static const struct regmap_bus regmap_fsi8 = { + .reg_write = regmap_fsi8_reg_write, + .reg_read = regmap_fsi8_reg_read, +}; + +static const struct regmap_bus *regmap_get_fsi_bus(struct fsi_device *fsi_dev, + const struct regmap_config *config) +{ + const struct regmap_bus *bus = NULL; + + if (config->reg_bits == 8 || config->reg_bits == 16 || config->reg_bits == 32) { + switch (config->val_bits) { + case 8: + bus = ®map_fsi8; + break; + case 16: + switch (regmap_get_val_endian(&fsi_dev->dev, NULL, config)) { + case REGMAP_ENDIAN_LITTLE: +#ifdef __LITTLE_ENDIAN + case REGMAP_ENDIAN_NATIVE: +#endif + bus = ®map_fsi16le; + break; + case REGMAP_ENDIAN_DEFAULT: + case REGMAP_ENDIAN_BIG: +#ifdef __BIG_ENDIAN + case REGMAP_ENDIAN_NATIVE: +#endif + bus = ®map_fsi16; + break; + default: + break; + } + break; + case 32: + switch (regmap_get_val_endian(&fsi_dev->dev, NULL, config)) { + case REGMAP_ENDIAN_LITTLE: +#ifdef __LITTLE_ENDIAN + case REGMAP_ENDIAN_NATIVE: +#endif + bus = ®map_fsi32le; + break; + case REGMAP_ENDIAN_DEFAULT: + case REGMAP_ENDIAN_BIG: +#ifdef __BIG_ENDIAN + case REGMAP_ENDIAN_NATIVE: +#endif + bus = ®map_fsi32; + break; + default: + break; + } + break; + } + } + + return bus ?: ERR_PTR(-EOPNOTSUPP); +} + +struct regmap *__regmap_init_fsi(struct fsi_device *fsi_dev, const struct regmap_config *config, + struct lock_class_key *lock_key, const char *lock_name) +{ + const struct regmap_bus *bus = regmap_get_fsi_bus(fsi_dev, config); + + if (IS_ERR(bus)) + return ERR_CAST(bus); + + return __regmap_init(&fsi_dev->dev, bus, fsi_dev->slave, config, lock_key, lock_name); +} +EXPORT_SYMBOL_GPL(__regmap_init_fsi); + +struct regmap *__devm_regmap_init_fsi(struct fsi_device *fsi_dev, + const struct regmap_config *config, + struct lock_class_key *lock_key, const char *lock_name) +{ + const struct regmap_bus *bus = regmap_get_fsi_bus(fsi_dev, config); + + if (IS_ERR(bus)) + return ERR_CAST(bus); + + return __devm_regmap_init(&fsi_dev->dev, bus, fsi_dev->slave, config, lock_key, lock_name); +} +EXPORT_SYMBOL_GPL(__devm_regmap_init_fsi); + +MODULE_LICENSE("GPL"); diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c index 4ef9488d05cd..a8f185430a07 100644 --- a/drivers/base/regmap/regmap-irq.c +++ b/drivers/base/regmap/regmap-irq.c @@ -115,12 +115,20 @@ static void regmap_irq_sync_unlock(struct irq_data *data) */ for (i = 0; i < d->chip->num_regs; i++) { if (d->mask_base) { - reg = d->get_irq_reg(d, d->mask_base, i); - ret = regmap_update_bits(d->map, reg, - d->mask_buf_def[i], d->mask_buf[i]); - if (ret) - dev_err(d->map->dev, "Failed to sync masks in %x\n", - reg); + if (d->chip->handle_mask_sync) + d->chip->handle_mask_sync(d->map, i, + d->mask_buf_def[i], + d->mask_buf[i], + d->chip->irq_drv_data); + else { + reg = d->get_irq_reg(d, d->mask_base, i); + ret = regmap_update_bits(d->map, reg, + d->mask_buf_def[i], + d->mask_buf[i]); + if (ret) + dev_err(d->map->dev, "Failed to sync masks in %x\n", + reg); + } } if (d->unmask_base) { @@ -722,6 +730,7 @@ int regmap_add_irq_chip_fwnode(struct fwnode_handle *fwnode, int i; int ret = -ENOMEM; int num_type_reg; + int num_regs; u32 reg; if (chip->num_regs <= 0) @@ -796,14 +805,20 @@ int regmap_add_irq_chip_fwnode(struct fwnode_handle *fwnode, goto err_alloc; } - num_type_reg = chip->type_in_mask ? chip->num_regs : chip->num_type_reg; - if (num_type_reg) { - d->type_buf_def = kcalloc(num_type_reg, + /* + * Use num_config_regs if defined, otherwise fall back to num_type_reg + * to maintain backward compatibility. + */ + num_type_reg = chip->num_config_regs ? chip->num_config_regs + : chip->num_type_reg; + num_regs = chip->type_in_mask ? chip->num_regs : num_type_reg; + if (num_regs) { + d->type_buf_def = kcalloc(num_regs, sizeof(*d->type_buf_def), GFP_KERNEL); if (!d->type_buf_def) goto err_alloc; - d->type_buf = kcalloc(num_type_reg, sizeof(*d->type_buf), + d->type_buf = kcalloc(num_regs, sizeof(*d->type_buf), GFP_KERNEL); if (!d->type_buf) goto err_alloc; @@ -917,13 +932,23 @@ int regmap_add_irq_chip_fwnode(struct fwnode_handle *fwnode, d->mask_buf[i] = d->mask_buf_def[i]; if (d->mask_base) { - reg = d->get_irq_reg(d, d->mask_base, i); - ret = regmap_update_bits(d->map, reg, - d->mask_buf_def[i], d->mask_buf[i]); - if (ret) { - dev_err(map->dev, "Failed to set masks in 0x%x: %d\n", - reg, ret); - goto err_alloc; + if (chip->handle_mask_sync) { + ret = chip->handle_mask_sync(d->map, i, + d->mask_buf_def[i], + d->mask_buf[i], + chip->irq_drv_data); + if (ret) + goto err_alloc; + } else { + reg = d->get_irq_reg(d, d->mask_base, i); + ret = regmap_update_bits(d->map, reg, + d->mask_buf_def[i], + d->mask_buf[i]); + if (ret) { + dev_err(map->dev, "Failed to set masks in 0x%x: %d\n", + reg, ret); + goto err_alloc; + } } } diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index c6d6d53e8cd3..d12d669157f2 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -3486,6 +3486,19 @@ int regmap_get_reg_stride(struct regmap *map) } EXPORT_SYMBOL_GPL(regmap_get_reg_stride); +/** + * regmap_might_sleep() - Returns whether a regmap access might sleep. + * + * @map: Register map to operate on. + * + * Returns true if an access to the register might sleep, else false. + */ +bool regmap_might_sleep(struct regmap *map) +{ + return map->can_sleep; +} +EXPORT_SYMBOL_GPL(regmap_might_sleep); + int regmap_parse_val(struct regmap *map, const void *buf, unsigned int *val) { diff --git a/include/linux/regmap.h b/include/linux/regmap.h index ca3434dca3a0..a3bc695bcca0 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -24,6 +24,7 @@ struct module; struct clk; struct device; struct device_node; +struct fsi_device; struct i2c_client; struct i3c_device; struct irq_domain; @@ -628,6 +629,10 @@ struct regmap *__regmap_init_spi_avmm(struct spi_device *spi, const struct regmap_config *config, struct lock_class_key *lock_key, const char *lock_name); +struct regmap *__regmap_init_fsi(struct fsi_device *fsi_dev, + const struct regmap_config *config, + struct lock_class_key *lock_key, + const char *lock_name); struct regmap *__devm_regmap_init(struct device *dev, const struct regmap_bus *bus, @@ -693,6 +698,11 @@ struct regmap *__devm_regmap_init_spi_avmm(struct spi_device *spi, const struct regmap_config *config, struct lock_class_key *lock_key, const char *lock_name); +struct regmap *__devm_regmap_init_fsi(struct fsi_device *fsi_dev, + const struct regmap_config *config, + struct lock_class_key *lock_key, + const char *lock_name); + /* * Wrapper for regmap_init macros to include a unique lockdep key and name * for each call. No-op if CONFIG_LOCKDEP is not set. @@ -920,6 +930,19 @@ bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg); spi, config) /** + * regmap_init_fsi() - Initialise register map + * + * @fsi_dev: 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. + */ +#define regmap_init_fsi(fsi_dev, config) \ + __regmap_lockdep_wrapper(__regmap_init_fsi, #config, fsi_dev, \ + config) + +/** * devm_regmap_init() - Initialise managed register map * * @dev: Device that will be interacted with @@ -1148,6 +1171,20 @@ bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg); __regmap_lockdep_wrapper(__devm_regmap_init_spi_avmm, #config, \ spi, config) +/** + * devm_regmap_init_fsi() - Initialise managed register map + * + * @fsi_dev: 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. + */ +#define devm_regmap_init_fsi(fsi_dev, config) \ + __regmap_lockdep_wrapper(__devm_regmap_init_fsi, #config, \ + fsi_dev, config) + int regmap_mmio_attach_clk(struct regmap *map, struct clk *clk); void regmap_mmio_detach_clk(struct regmap *map); void regmap_exit(struct regmap *map); @@ -1219,6 +1256,7 @@ static inline int regmap_write_bits(struct regmap *map, unsigned int reg, int regmap_get_val_bytes(struct regmap *map); int regmap_get_max_register(struct regmap *map); int regmap_get_reg_stride(struct regmap *map); +bool regmap_might_sleep(struct regmap *map); int regmap_async_complete(struct regmap *map); bool regmap_can_raw_write(struct regmap *map); size_t regmap_get_raw_read_max(struct regmap *map); @@ -1542,6 +1580,8 @@ struct regmap_irq_chip_data; * before regmap_irq_handler process the interrupts. * @handle_post_irq: Driver specific callback to handle interrupt from device * after handling the interrupts in regmap_irq_handler(). + * @handle_mask_sync: Callback used to handle IRQ mask syncs. The index will be + * in the range [0, num_regs) * @set_type_virt: Driver specific callback to extend regmap_irq_set_type() * and configure virt regs. Deprecated, use @set_type_config * callback and config registers instead. @@ -1603,6 +1643,9 @@ struct regmap_irq_chip { int (*handle_pre_irq)(void *irq_drv_data); int (*handle_post_irq)(void *irq_drv_data); + int (*handle_mask_sync)(struct regmap *map, int index, + unsigned int mask_buf_def, + unsigned int mask_buf, void *irq_drv_data); int (*set_type_virt)(unsigned int **buf, unsigned int type, unsigned long hwirq, int reg); int (*set_type_config)(unsigned int **buf, unsigned int type, @@ -1905,6 +1948,12 @@ static inline int regmap_get_reg_stride(struct regmap *map) return -EINVAL; } +static inline bool regmap_might_sleep(struct regmap *map) +{ + WARN_ONCE(1, "regmap API is disabled"); + return true; +} + static inline int regcache_sync(struct regmap *map) { WARN_ONCE(1, "regmap API is disabled"); |