/* Copyright (c) 2015, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that 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. */ #ifndef _LINUX_SOUNDWIRE_H #define _LINUX_SOUNDWIRE_H #include #include #include extern struct bus_type soundwire_type; /* Soundwire supports max. of 8 channels per port */ #define SWR_MAX_CHANNEL_NUM 8 /* Soundwire supports max. of 14 ports on each device */ #define SWR_MAX_DEV_PORT_NUM 14 /* Maximum number of slave devices that a master can control */ #define SWR_MAX_DEV_NUM 11 /* Maximum number of ports on master so that it can accomodate all the port * configurations of all devices */ #define SWR_MAX_MSTR_PORT_NUM (SWR_MAX_DEV_NUM * SWR_MAX_DEV_PORT_NUM) /* Indicates soundwire devices group information */ enum { SWR_GROUP_NONE = 0, SWR_GROUP_12 = 12, SWR_GROUP_13 = 13, SWR_BROADCAST = 15, }; /* * struct swr_port_info - represent soundwire frame shape * @dev_id: logical device number of the soundwire slave device * @port_en: flag indicates whether the port is enabled * @port_id: logical port number of the soundwire slave device * @offset1: sample offset indicating the offset of the channel * from the start of the frame * @offset2: channel offset indicating offset between to channels * @sinterval: sample interval indicates spacing from one sample * event to the next * @ch_en: channels in a port that need to be enabled * @num_ch: number of channels enabled in a port * @ch_rate: sampling rate of the channel with which data will be * transferred * * Soundwire frame shape is created based on swr_port_info struct * parameters. */ struct swr_port_info { u8 dev_id; u8 port_en; u8 port_id; u8 offset1; u8 offset2; u8 sinterval; u8 ch_en; u8 num_ch; u32 ch_rate; }; /* * struct swr_params - represent transfer of data from soundwire slave * to soundwire master * @tid: transaction ID to track each transaction * @dev_id: logical device number of the soundwire slave device * @num_port: number of ports that needs to be configured * @port_id: array of logical port numbers of the soundwire slave device * @num_ch: array of number of channels enabled * @ch_rate: array of sampling rate of different channels that need to * be configured * @ch_en: array of channels mask for all the ports */ struct swr_params { u8 tid; u8 dev_id; u8 num_port; u8 port_id[SWR_MAX_DEV_PORT_NUM]; u8 num_ch[SWR_MAX_DEV_PORT_NUM]; u32 ch_rate[SWR_MAX_DEV_PORT_NUM]; u8 ch_en[SWR_MAX_DEV_PORT_NUM]; }; /* * struct swr_reg - struct to handle soundwire slave register read/writes * @tid: transaction id for reg read/writes * @dev_id: logical device number of the soundwire slave device * @regaddr: 16 bit regaddr of soundwire slave * @buf: value to be written/read to/from regaddr * @len: length of the buffer buf */ struct swr_reg { u8 tid; u8 dev_id; u32 regaddr; u32 *buf; u32 len; }; /* * struct swr_master - Interface to the soundwire master controller * @dev: device interface to this driver * @list: link with other soundwire master controllers * @bus_num: board/SoC specific identifier for a soundwire master * @mlock: mutex protecting master data structures * @devices: list of devices on this master * @port: logical port numbers of the soundwire master. This array * can hold maximum master ports which is equal to number of slave * devices multiplied by number of ports in each slave device * @port_txn: table of port config transactions with transaction id * @reg_txn: table of register transactions with transaction id * @last_tid: size of table port_txn (can't grow beyond 256 since * tid is 8 bits) * @num_port: number of active ports on soundwire master * @gr_sid: slave id used by the group for write operations * @connect_port: callback for configuration of soundwire port(s) * @disconnect_port: callback for disable of soundwire port(s) * @read: callback for soundwire slave register read * @write: callback for soundwire slave register write * @get_logical_dev_num: callback to get soundwire slave logical * device number */ struct swr_master { struct device dev; struct list_head list; unsigned int bus_num; struct mutex mlock; struct list_head devices; struct swr_port_info port[SWR_MAX_MSTR_PORT_NUM]; struct swr_params **port_txn; struct swr_reg **reg_txn; u8 last_tid; u8 num_port; u8 num_dev; u8 gr_sid; int (*connect_port)(struct swr_master *mstr, struct swr_params *txn); int (*disconnect_port)(struct swr_master *mstr, struct swr_params *txn); int (*read)(struct swr_master *mstr, u8 dev_num, u16 reg_addr, void *buf, u32 len); int (*write)(struct swr_master *mstr, u8 dev_num, u16 reg_addr, const void *buf); int (*bulk_write)(struct swr_master *master, u8 dev_num, void *reg, const void *buf, size_t len); int (*get_logical_dev_num)(struct swr_master *mstr, u64 dev_id, u8 *dev_num); }; static inline struct swr_master *to_swr_master(struct device *dev) { return dev ? container_of(dev, struct swr_master, dev) : NULL; } /* * struct swr_device - represent a soundwire slave device * @name: indicates the name of the device, defined in devicetree * binding under soundwire slave device node as a compatible field. * @master: soundwire master managing the bus hosting this device * @driver: Device's driver. Pointer to access routines * @dev_list: list of devices on a controller * @dev_num: logical device number of the soundwire slave device * @dev: driver model representation of the device * @addr: represents "ea-addr" which is unique-id of soundwire slave * device * @group_id: group id supported by the slave device */ struct swr_device { char name[SOUNDWIRE_NAME_SIZE]; struct swr_master *master; struct swr_driver *driver; struct list_head dev_list; u8 dev_num; struct device dev; unsigned long addr; u8 group_id; }; static inline struct swr_device *to_swr_device(struct device *dev) { return dev ? container_of(dev, struct swr_device, dev) : NULL; } /* * struct swr_driver - Manage soundwire slave device driver * @probe: binds this driver to soundwire device * @remove: unbinds this driver from soundwire device * @shutdown: standard shutdown callback used during power down/halt * @suspend: standard suspend callback used during system suspend * @resume: standard resume callback used during system resume * @startup: additional init operation for slave devices * @driver: soundwire device drivers should initialize name and * owner field of this structure * @id_table: list of soundwire devices supported by this driver */ struct swr_driver { int (*probe)(struct swr_device *swr); int (*remove)(struct swr_device *swr); void (*shutdown)(struct swr_device *swr); int (*suspend)(struct swr_device *swr, pm_message_t pmesg); int (*resume)(struct swr_device *swr); int (*device_up)(struct swr_device *swr); int (*device_down)(struct swr_device *swr); int (*reset_device)(struct swr_device *swr); int (*startup)(struct swr_device *swr); struct device_driver driver; const struct swr_device_id *id_table; }; static inline struct swr_driver *to_swr_driver(struct device_driver *drv) { return drv ? container_of(drv, struct swr_driver, driver) : NULL; } /* * struct swr_boardinfo - Declare board info for soundwire device bringup * @name: name to initialize swr_device.name * @bus_num: identifies which soundwire master parents the soundwire * slave_device * @addr: represents "ea-addr" of soundwire slave device * @of_node: pointer to OpenFirmware device node * @swr_slave: device to be registered with soundwire */ struct swr_boardinfo { char name[SOUNDWIRE_NAME_SIZE]; int bus_num; u64 addr; struct device_node *of_node; struct swr_device *swr_slave; }; static inline void *swr_get_ctrl_data(const struct swr_master *master) { return master ? dev_get_drvdata(&master->dev) : NULL; } static inline void swr_set_ctrl_data(struct swr_master *master, void *data) { dev_set_drvdata(&master->dev, data); } static inline void *swr_get_dev_data(const struct swr_device *dev) { return dev ? dev_get_drvdata(&dev->dev) : NULL; } static inline void swr_set_dev_data(struct swr_device *dev, void *data) { dev_set_drvdata(&dev->dev, data); } extern int swr_startup_devices(struct swr_device *swr_dev); extern struct swr_device *swr_new_device(struct swr_master *master, struct swr_boardinfo const *info); extern int of_register_swr_devices(struct swr_master *master); extern void swr_port_response(struct swr_master *mstr, u8 tid); extern int swr_get_logical_dev_num(struct swr_device *dev, u64 dev_id, u8 *dev_num); extern int swr_read(struct swr_device *dev, u8 dev_num, u16 reg_addr, void *buf, u32 len); extern int swr_write(struct swr_device *dev, u8 dev_num, u16 reg_addr, const void *buf); extern int swr_bulk_write(struct swr_device *dev, u8 dev_num, void *reg_addr, const void *buf, size_t len); extern int swr_connect_port(struct swr_device *dev, u8 *port_id, u8 num_port, u8 *ch_mask, u32 *ch_rate, u8 *num_ch); extern int swr_disconnect_port(struct swr_device *dev, u8 *port_id, u8 num_port); extern int swr_set_device_group(struct swr_device *swr_dev, u8 id); extern int swr_driver_register(struct swr_driver *drv); extern void swr_driver_unregister(struct swr_driver *drv); extern int swr_add_device(struct swr_master *master, struct swr_device *swrdev); extern void swr_remove_device(struct swr_device *swr); extern void swr_master_add_boarddevices(struct swr_master *master); extern void swr_unregister_master(struct swr_master *master); extern int swr_register_master(struct swr_master *master); extern int swr_device_up(struct swr_device *swr_dev); extern int swr_device_down(struct swr_device *swr_dev); extern int swr_reset_device(struct swr_device *swr_dev); #endif /* _LINUX_SOUNDWIRE_H */