diff options
Diffstat (limited to 'include/linux/i3c/master.h')
| -rw-r--r-- | include/linux/i3c/master.h | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h index c67922ece617..c52a82dd79a6 100644 --- a/include/linux/i3c/master.h +++ b/include/linux/i3c/master.h @@ -249,10 +249,15 @@ struct i3c_device { */ #define I3C_BUS_MAX_DEVS 11 -#define I3C_BUS_MAX_I3C_SCL_RATE 12900000 -#define I3C_BUS_TYP_I3C_SCL_RATE 12500000 -#define I3C_BUS_I2C_FM_PLUS_SCL_RATE 1000000 -#define I3C_BUS_I2C_FM_SCL_RATE 400000 +/* Taken from the I3C Spec V1.1.1, chapter 6.2. "Timing specification" */ +#define I3C_BUS_I2C_FM_PLUS_SCL_MAX_RATE 1000000 +#define I3C_BUS_I2C_FM_SCL_MAX_RATE 400000 +#define I3C_BUS_I3C_SCL_MAX_RATE 12900000 +#define I3C_BUS_I3C_SCL_TYP_RATE 12500000 +#define I3C_BUS_TAVAL_MIN_NS 1000 +#define I3C_BUS_TBUF_MIXED_FM_MIN_NS 1300 +#define I3C_BUS_THIGH_MIXED_MAX_NS 41 +#define I3C_BUS_TIDLE_MIN_NS 200000 #define I3C_BUS_TLOW_OD_MIN_NS 200 /** @@ -553,6 +558,26 @@ struct i3c_master_controller { #define i3c_bus_for_each_i3cdev(bus, dev) \ list_for_each_entry(dev, &(bus)->devs.i3c, common.node) +/** + * struct i3c_dma - DMA transfer and mapping descriptor + * @dev: device object of a device doing DMA + * @buf: destination/source buffer for DMA + * @len: length of transfer + * @map_len: length of DMA mapping + * @addr: mapped DMA address for a Host Controller Driver + * @dir: DMA direction + * @bounce_buf: an allocated bounce buffer if transfer needs it or NULL + */ +struct i3c_dma { + struct device *dev; + void *buf; + size_t len; + size_t map_len; + dma_addr_t addr; + enum dma_data_direction dir; + void *bounce_buf; +}; + int i3c_master_do_i2c_xfers(struct i3c_master_controller *master, const struct i2c_msg *xfers, int nxfers); @@ -570,6 +595,12 @@ int i3c_master_get_free_addr(struct i3c_master_controller *master, int i3c_master_add_i3c_dev_locked(struct i3c_master_controller *master, u8 addr); int i3c_master_do_daa(struct i3c_master_controller *master); +struct i3c_dma *i3c_master_dma_map_single(struct device *dev, void *ptr, + size_t len, bool force_bounce, + enum dma_data_direction dir); +void i3c_master_dma_unmap_single(struct i3c_dma *dma_xfer); +DEFINE_FREE(i3c_master_dma_unmap_single, void *, + if (_T) i3c_master_dma_unmap_single(_T)) int i3c_master_set_info(struct i3c_master_controller *master, const struct i3c_device_info *info); |