[linux-block.git] / drivers / soundwire / bus.h

/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
/* Copyright(c) 2015-17 Intel Corporation. */

#ifndef __SDW_BUS_H
#define __SDW_BUS_H

#define DEFAULT_BANK_SWITCH_TIMEOUT 3000
#define DEFAULT_PROBE_TIMEOUT       2000

#if IS_ENABLED(CONFIG_ACPI)
int sdw_acpi_find_slaves(struct sdw_bus *bus);
#else
static inline int sdw_acpi_find_slaves(struct sdw_bus *bus)
{
	return -ENOTSUPP;
}
#endif

int sdw_of_find_slaves(struct sdw_bus *bus);
void sdw_extract_slave_id(struct sdw_bus *bus,
			  u64 addr, struct sdw_slave_id *id);
int sdw_master_device_add(struct sdw_bus *bus, struct device *parent,
			  struct fwnode_handle *fwnode);
int sdw_master_device_del(struct sdw_bus *bus);

#ifdef CONFIG_DEBUG_FS
void sdw_bus_debugfs_init(struct sdw_bus *bus);
void sdw_bus_debugfs_exit(struct sdw_bus *bus);
void sdw_slave_debugfs_init(struct sdw_slave *slave);
void sdw_slave_debugfs_exit(struct sdw_slave *slave);
void sdw_debugfs_init(void);
void sdw_debugfs_exit(void);
#else
static inline void sdw_bus_debugfs_init(struct sdw_bus *bus) {}
static inline void sdw_bus_debugfs_exit(struct sdw_bus *bus) {}
static inline void sdw_slave_debugfs_init(struct sdw_slave *slave) {}
static inline void sdw_slave_debugfs_exit(struct sdw_slave *slave) {}
static inline void sdw_debugfs_init(void) {}
static inline void sdw_debugfs_exit(void) {}
#endif

enum {
	SDW_MSG_FLAG_READ = 0,
	SDW_MSG_FLAG_WRITE,
};

/**
 * struct sdw_msg - Message structure
 * @addr: Register address accessed in the Slave
 * @len: number of messages
 * @dev_num: Slave device number
 * @addr_page1: SCP address page 1 Slave register
 * @addr_page2: SCP address page 2 Slave register
 * @flags: transfer flags, indicate if xfer is read or write
 * @buf: message data buffer
 * @ssp_sync: Send message at SSP (Stream Synchronization Point)
 * @page: address requires paging
 */
struct sdw_msg {
	u16 addr;
	u16 len;
	u8 dev_num;
	u8 addr_page1;
	u8 addr_page2;
	u8 flags;
	u8 *buf;
	bool ssp_sync;
	bool page;
};

#define SDW_DOUBLE_RATE_FACTOR		2
#define SDW_STRM_RATE_GROUPING		1

extern int sdw_rows[SDW_FRAME_ROWS];
extern int sdw_cols[SDW_FRAME_COLS];

int sdw_find_row_index(int row);
int sdw_find_col_index(int col);

/**
 * sdw_port_runtime: Runtime port parameters for Master or Slave
 *
 * @num: Port number. For audio streams, valid port number ranges from
 * [1,14]
 * @ch_mask: Channel mask
 * @transport_params: Transport parameters
 * @port_params: Port parameters
 * @port_node: List node for Master or Slave port_list
 *
 * SoundWire spec has no mention of ports for Master interface but the
 * concept is logically extended.
 */
struct sdw_port_runtime {
	int num;
	int ch_mask;
	struct sdw_transport_params transport_params;
	struct sdw_port_params port_params;
	struct list_head port_node;
};

/**
 * sdw_slave_runtime: Runtime Stream parameters for Slave
 *
 * @slave: Slave handle
 * @direction: Data direction for Slave
 * @ch_count: Number of channels handled by the Slave for
 * this stream
 * @m_rt_node: sdw_master_runtime list node
 * @port_list: List of Slave Ports configured for this stream
 */
struct sdw_slave_runtime {
	struct sdw_slave *slave;
	enum sdw_data_direction direction;
	unsigned int ch_count;
	struct list_head m_rt_node;
	struct list_head port_list;
};

/**
 * sdw_master_runtime: Runtime stream parameters for Master
 *
 * @bus: Bus handle
 * @stream: Stream runtime handle
 * @direction: Data direction for Master
 * @ch_count: Number of channels handled by the Master for
 * this stream, can be zero.
 * @slave_rt_list: Slave runtime list
 * @port_list: List of Master Ports configured for this stream, can be zero.
 * @stream_node: sdw_stream_runtime master_list node
 * @bus_node: sdw_bus m_rt_list node
 */
struct sdw_master_runtime {
	struct sdw_bus *bus;
	struct sdw_stream_runtime *stream;
	enum sdw_data_direction direction;
	unsigned int ch_count;
	struct list_head slave_rt_list;
	struct list_head port_list;
	struct list_head stream_node;
	struct list_head bus_node;
};

struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave,
					    enum sdw_data_direction direction,
					    unsigned int port_num);
int sdw_configure_dpn_intr(struct sdw_slave *slave, int port,
			   bool enable, int mask);

int sdw_transfer(struct sdw_bus *bus, struct sdw_msg *msg);
int sdw_transfer_defer(struct sdw_bus *bus, struct sdw_msg *msg,
		       struct sdw_defer *defer);

#define SDW_READ_INTR_CLEAR_RETRY	10

int sdw_fill_msg(struct sdw_msg *msg, struct sdw_slave *slave,
		 u32 addr, size_t count, u16 dev_num, u8 flags, u8 *buf);

/* Retrieve and return channel count from channel mask */
static inline int sdw_ch_mask_to_ch(int ch_mask)
{
	int c = 0;

	for (c = 0; ch_mask; ch_mask >>= 1)
		c += ch_mask & 1;

	return c;
}

/* Fill transport parameter data structure */
static inline void sdw_fill_xport_params(struct sdw_transport_params *params,
					 int port_num, bool grp_ctrl_valid,
					 int grp_ctrl, int sample_int,
					 int off1, int off2,
					 int hstart, int hstop,
					 int pack_mode, int lane_ctrl)
{
	params->port_num = port_num;
	params->blk_grp_ctrl_valid = grp_ctrl_valid;
	params->blk_grp_ctrl = grp_ctrl;
	params->sample_interval = sample_int;
	params->offset1 = off1;
	params->offset2 = off2;
	params->hstart = hstart;
	params->hstop = hstop;
	params->blk_pkg_mode = pack_mode;
	params->lane_ctrl = lane_ctrl;
}

/* Fill port parameter data structure */
static inline void sdw_fill_port_params(struct sdw_port_params *params,
					int port_num, int bps,
					int flow_mode, int data_mode)
{
	params->num = port_num;
	params->bps = bps;
	params->flow_mode = flow_mode;
	params->data_mode = data_mode;
}

/* Read-Modify-Write Slave register */
static inline int sdw_update(struct sdw_slave *slave, u32 addr, u8 mask, u8 val)
{
	int tmp;

	tmp = sdw_read(slave, addr);
	if (tmp < 0)
		return tmp;

	tmp = (tmp & ~mask) | val;
	return sdw_write(slave, addr, tmp);
}

/* broadcast read/write for tests */
int sdw_bread_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr);
int sdw_bwrite_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr, u8 value);

/*
 * At the moment we only track Master-initiated hw_reset.
 * Additional fields can be added as needed
 */
#define SDW_UNATTACH_REQUEST_MASTER_RESET	BIT(0)

void sdw_clear_slave_status(struct sdw_bus *bus, u32 request);
int sdw_slave_modalias(const struct sdw_slave *slave, char *buf, size_t size);

#endif /* __SDW_BUS_H */
Commit	Line	Data
23859465 PLB	1	/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
23859465 PLB	2	/* Copyright(c) 2015-17 Intel Corporation. */
7c3cd189 VK	3
	4	#ifndef __SDW_BUS_H
	5	#define __SDW_BUS_H
	6
ce6e74d0	7	#define DEFAULT_BANK_SWITCH_TIMEOUT 3000
2140b66b	8	#define DEFAULT_PROBE_TIMEOUT 2000
ce6e74d0	9
7c3cd189 VK	10	#if IS_ENABLED(CONFIG_ACPI)
	11	int sdw_acpi_find_slaves(struct sdw_bus *bus);
	12	#else
	13	static inline int sdw_acpi_find_slaves(struct sdw_bus *bus)
	14	{
	15	return -ENOTSUPP;
	16	}
	17	#endif
	18
a2e48458	19	int sdw_of_find_slaves(struct sdw_bus *bus);
7c3cd189	20	void sdw_extract_slave_id(struct sdw_bus *bus,
806a11f0	21	u64 addr, struct sdw_slave_id *id);
7ceaa40b PLB	22	int sdw_master_device_add(struct sdw_bus bus, struct device parent,
	23	struct fwnode_handle *fwnode);
	24	int sdw_master_device_del(struct sdw_bus *bus);
7c3cd189	25
bf03473d PLB	26	#ifdef CONFIG_DEBUG_FS
	27	void sdw_bus_debugfs_init(struct sdw_bus *bus);
	28	void sdw_bus_debugfs_exit(struct sdw_bus *bus);
	29	void sdw_slave_debugfs_init(struct sdw_slave *slave);
	30	void sdw_slave_debugfs_exit(struct sdw_slave *slave);
	31	void sdw_debugfs_init(void);
	32	void sdw_debugfs_exit(void);
	33	#else
	34	static inline void sdw_bus_debugfs_init(struct sdw_bus *bus) {}
	35	static inline void sdw_bus_debugfs_exit(struct sdw_bus *bus) {}
	36	static inline void sdw_slave_debugfs_init(struct sdw_slave *slave) {}
	37	static inline void sdw_slave_debugfs_exit(struct sdw_slave *slave) {}
	38	static inline void sdw_debugfs_init(void) {}
	39	static inline void sdw_debugfs_exit(void) {}
	40	#endif
	41
9d715fa0 VK	42	enum {
	43	SDW_MSG_FLAG_READ = 0,
	44	SDW_MSG_FLAG_WRITE,
	45	};
	46
	47	/**
	48	* struct sdw_msg - Message structure
	49	* @addr: Register address accessed in the Slave
	50	* @len: number of messages
	51	* @dev_num: Slave device number
	52	* @addr_page1: SCP address page 1 Slave register
	53	* @addr_page2: SCP address page 2 Slave register
	54	* @flags: transfer flags, indicate if xfer is read or write
	55	* @buf: message data buffer
	56	* @ssp_sync: Send message at SSP (Stream Synchronization Point)
	57	* @page: address requires paging
	58	*/
	59	struct sdw_msg {
	60	u16 addr;
	61	u16 len;
	62	u8 dev_num;
	63	u8 addr_page1;
	64	u8 addr_page2;
	65	u8 flags;
	66	u8 *buf;
	67	bool ssp_sync;
	68	bool page;
	69	};
	70
99b8a5d6	71	#define SDW_DOUBLE_RATE_FACTOR 2
9026118f	72	#define SDW_STRM_RATE_GROUPING 1
99b8a5d6	73
fe4b70f2 PLB	74	extern int sdw_rows[SDW_FRAME_ROWS];
	75	extern int sdw_cols[SDW_FRAME_COLS];
	76
	77	int sdw_find_row_index(int row);
	78	int sdw_find_col_index(int col);
99b8a5d6	79
bbe7379d SK	80	/**
	81	* sdw_port_runtime: Runtime port parameters for Master or Slave
	82	*
	83	* @num: Port number. For audio streams, valid port number ranges from
	84	* [1,14]
	85	* @ch_mask: Channel mask
	86	* @transport_params: Transport parameters
	87	* @port_params: Port parameters
	88	* @port_node: List node for Master or Slave port_list
	89	*
	90	* SoundWire spec has no mention of ports for Master interface but the
	91	* concept is logically extended.
	92	*/
	93	struct sdw_port_runtime {
	94	int num;
	95	int ch_mask;
	96	struct sdw_transport_params transport_params;
	97	struct sdw_port_params port_params;
	98	struct list_head port_node;
	99	};
	100
89e59053 SK	101	/**
	102	* sdw_slave_runtime: Runtime Stream parameters for Slave
	103	*
	104	* @slave: Slave handle
	105	* @direction: Data direction for Slave
	106	* @ch_count: Number of channels handled by the Slave for
	107	* this stream
	108	* @m_rt_node: sdw_master_runtime list node
bbe7379d	109	* @port_list: List of Slave Ports configured for this stream
89e59053 SK	110	*/
	111	struct sdw_slave_runtime {
	112	struct sdw_slave *slave;
	113	enum sdw_data_direction direction;
	114	unsigned int ch_count;
	115	struct list_head m_rt_node;
bbe7379d	116	struct list_head port_list;
89e59053 SK	117	};
	118
	119	/**
	120	* sdw_master_runtime: Runtime stream parameters for Master
	121	*
	122	* @bus: Bus handle
	123	* @stream: Stream runtime handle
	124	* @direction: Data direction for Master
	125	* @ch_count: Number of channels handled by the Master for
	126	* this stream, can be zero.
	127	* @slave_rt_list: Slave runtime list
bbe7379d	128	* @port_list: List of Master Ports configured for this stream, can be zero.
0c4a1049	129	* @stream_node: sdw_stream_runtime master_list node
89e59053 SK	130	* @bus_node: sdw_bus m_rt_list node
	131	*/
	132	struct sdw_master_runtime {
	133	struct sdw_bus *bus;
	134	struct sdw_stream_runtime *stream;
	135	enum sdw_data_direction direction;
	136	unsigned int ch_count;
	137	struct list_head slave_rt_list;
bbe7379d	138	struct list_head port_list;
0c4a1049	139	struct list_head stream_node;
89e59053 SK	140	struct list_head bus_node;
	141	};
	142
f8101c74	143	struct sdw_dpn_prop sdw_get_slave_dpn_prop(struct sdw_slave slave,
806a11f0 PLB	144	enum sdw_data_direction direction,
806a11f0 PLB	145	unsigned int port_num);
79df15b7	146	int sdw_configure_dpn_intr(struct sdw_slave *slave, int port,
806a11f0	147	bool enable, int mask);
f8101c74	148
9d715fa0 VK	149	int sdw_transfer(struct sdw_bus bus, struct sdw_msg msg);
9d715fa0 VK	150	int sdw_transfer_defer(struct sdw_bus bus, struct sdw_msg msg,
806a11f0	151	struct sdw_defer *defer);
9d715fa0	152
b0a9c37b VK	153	#define SDW_READ_INTR_CLEAR_RETRY 10
b0a9c37b VK	154
9d715fa0	155	int sdw_fill_msg(struct sdw_msg msg, struct sdw_slave slave,
806a11f0	156	u32 addr, size_t count, u16 dev_num, u8 flags, u8 *buf);
9d715fa0	157
9026118f BL	158	/* Retrieve and return channel count from channel mask */
	159	static inline int sdw_ch_mask_to_ch(int ch_mask)
	160	{
	161	int c = 0;
	162
	163	for (c = 0; ch_mask; ch_mask >>= 1)
	164	c += ch_mask & 1;
	165
	166	return c;
	167	}
	168
	169	/* Fill transport parameter data structure */
	170	static inline void sdw_fill_xport_params(struct sdw_transport_params *params,
	171	int port_num, bool grp_ctrl_valid,
	172	int grp_ctrl, int sample_int,
	173	int off1, int off2,
	174	int hstart, int hstop,
	175	int pack_mode, int lane_ctrl)
	176	{
	177	params->port_num = port_num;
	178	params->blk_grp_ctrl_valid = grp_ctrl_valid;
	179	params->blk_grp_ctrl = grp_ctrl;
	180	params->sample_interval = sample_int;
	181	params->offset1 = off1;
	182	params->offset2 = off2;
	183	params->hstart = hstart;
	184	params->hstop = hstop;
	185	params->blk_pkg_mode = pack_mode;
	186	params->lane_ctrl = lane_ctrl;
	187	}
	188
	189	/* Fill port parameter data structure */
	190	static inline void sdw_fill_port_params(struct sdw_port_params *params,
	191	int port_num, int bps,
	192	int flow_mode, int data_mode)
	193	{
	194	params->num = port_num;
	195	params->bps = bps;
	196	params->flow_mode = flow_mode;
	197	params->data_mode = data_mode;
	198	}
	199
d52d7a1b	200	/* Read-Modify-Write Slave register */
9026118f	201	static inline int sdw_update(struct sdw_slave *slave, u32 addr, u8 mask, u8 val)
d52d7a1b SK	202	{
	203	int tmp;
	204
	205	tmp = sdw_read(slave, addr);
	206	if (tmp < 0)
	207	return tmp;
	208
	209	tmp = (tmp & ~mask) \| val;
	210	return sdw_write(slave, addr, tmp);
	211	}
	212
a350aff4 PLB	213	/* broadcast read/write for tests */
	214	int sdw_bread_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr);
	215	int sdw_bwrite_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr, u8 value);
	216
3ab2ca40 PLB	217	/*
	218	* At the moment we only track Master-initiated hw_reset.
	219	* Additional fields can be added as needed
	220	*/
	221	#define SDW_UNATTACH_REQUEST_MASTER_RESET BIT(0)
	222
	223	void sdw_clear_slave_status(struct sdw_bus *bus, u32 request);
bcac5902	224	int sdw_slave_modalias(const struct sdw_slave slave, char buf, size_t size);
3ab2ca40	225
7c3cd189	226	#endif /* __SDW_BUS_H */