Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
2/* Copyright(c) 2015-17 Intel Corporation. */
3
4#ifndef __SDW_BUS_H
5#define __SDW_BUS_H
6
7#define DEFAULT_BANK_SWITCH_TIMEOUT 3000
8#define DEFAULT_PROBE_TIMEOUT 2000
9
10u64 sdw_dmi_override_adr(struct sdw_bus *bus, u64 addr);
11
12#if IS_ENABLED(CONFIG_ACPI)
13int sdw_acpi_find_slaves(struct sdw_bus *bus);
14#else
15static inline int sdw_acpi_find_slaves(struct sdw_bus *bus)
16{
17 return -ENOTSUPP;
18}
19#endif
20
21int sdw_of_find_slaves(struct sdw_bus *bus);
22void sdw_extract_slave_id(struct sdw_bus *bus,
23 u64 addr, struct sdw_slave_id *id);
24int sdw_slave_add(struct sdw_bus *bus, struct sdw_slave_id *id,
25 struct fwnode_handle *fwnode);
26int sdw_master_device_add(struct sdw_bus *bus, struct device *parent,
27 struct fwnode_handle *fwnode);
28int sdw_master_device_del(struct sdw_bus *bus);
29
30#ifdef CONFIG_DEBUG_FS
31void sdw_bus_debugfs_init(struct sdw_bus *bus);
32void sdw_bus_debugfs_exit(struct sdw_bus *bus);
33void sdw_slave_debugfs_init(struct sdw_slave *slave);
34void sdw_slave_debugfs_exit(struct sdw_slave *slave);
35void sdw_debugfs_init(void);
36void sdw_debugfs_exit(void);
37#else
38static inline void sdw_bus_debugfs_init(struct sdw_bus *bus) {}
39static inline void sdw_bus_debugfs_exit(struct sdw_bus *bus) {}
40static inline void sdw_slave_debugfs_init(struct sdw_slave *slave) {}
41static inline void sdw_slave_debugfs_exit(struct sdw_slave *slave) {}
42static inline void sdw_debugfs_init(void) {}
43static inline void sdw_debugfs_exit(void) {}
44#endif
45
46enum {
47 SDW_MSG_FLAG_READ = 0,
48 SDW_MSG_FLAG_WRITE,
49};
50
51/**
52 * struct sdw_msg - Message structure
53 * @addr: Register address accessed in the Slave
54 * @len: number of messages
55 * @dev_num: Slave device number
56 * @addr_page1: SCP address page 1 Slave register
57 * @addr_page2: SCP address page 2 Slave register
58 * @flags: transfer flags, indicate if xfer is read or write
59 * @buf: message data buffer
60 * @ssp_sync: Send message at SSP (Stream Synchronization Point)
61 * @page: address requires paging
62 */
63struct sdw_msg {
64 u16 addr;
65 u16 len;
66 u8 dev_num;
67 u8 addr_page1;
68 u8 addr_page2;
69 u8 flags;
70 u8 *buf;
71 bool ssp_sync;
72 bool page;
73};
74
75/**
76 * struct sdw_btp_section - Message section structure
77 * @addr: Start Register address accessed in the Slave
78 * @len: number of bytes to transfer. More than 64Kb can be transferred
79 * but a practical limit of SDW_BPT_MSG_MAX_BYTES is enforced.
80 * @buf: section data buffer (filled by host for write, filled
81 * by Peripheral hardware for reads)
82 */
83struct sdw_bpt_section {
84 u32 addr;
85 u32 len;
86 u8 *buf;
87};
88
89/**
90 * struct sdw_btp_msg - Message structure
91 * @sec: Pointer to array of sections
92 * @sections: Number of sections in the array
93 * @dev_num: Slave device number
94 * @flags: transfer flags, indicate if xfer is read or write
95 */
96struct sdw_bpt_msg {
97 struct sdw_bpt_section *sec;
98 int sections;
99 u8 dev_num;
100 u8 flags;
101};
102
103#define SDW_DOUBLE_RATE_FACTOR 2
104#define SDW_STRM_RATE_GROUPING 1
105
106extern int sdw_rows[SDW_FRAME_ROWS];
107extern int sdw_cols[SDW_FRAME_COLS];
108
109int sdw_find_row_index(int row);
110int sdw_find_col_index(int col);
111
112/**
113 * sdw_port_runtime: Runtime port parameters for Master or Slave
114 *
115 * @num: Port number. For audio streams, valid port number ranges from
116 * [1,14]
117 * @ch_mask: Channel mask
118 * @transport_params: Transport parameters
119 * @port_params: Port parameters
120 * @port_node: List node for Master or Slave port_list
121 * @lane: Which lane is used
122 *
123 * SoundWire spec has no mention of ports for Master interface but the
124 * concept is logically extended.
125 */
126struct sdw_port_runtime {
127 int num;
128 int ch_mask;
129 struct sdw_transport_params transport_params;
130 struct sdw_port_params port_params;
131 struct list_head port_node;
132 unsigned int lane;
133};
134
135/**
136 * sdw_slave_runtime: Runtime Stream parameters for Slave
137 *
138 * @slave: Slave handle
139 * @direction: Data direction for Slave
140 * @ch_count: Number of channels handled by the Slave for
141 * this stream
142 * @m_rt_node: sdw_master_runtime list node
143 * @port_list: List of Slave Ports configured for this stream
144 */
145struct sdw_slave_runtime {
146 struct sdw_slave *slave;
147 enum sdw_data_direction direction;
148 unsigned int ch_count;
149 struct list_head m_rt_node;
150 struct list_head port_list;
151};
152
153/**
154 * sdw_master_runtime: Runtime stream parameters for Master
155 *
156 * @bus: Bus handle
157 * @stream: Stream runtime handle
158 * @direction: Data direction for Master
159 * @ch_count: Number of channels handled by the Master for
160 * this stream, can be zero.
161 * @slave_rt_list: Slave runtime list
162 * @port_list: List of Master Ports configured for this stream, can be zero.
163 * @stream_node: sdw_stream_runtime master_list node
164 * @bus_node: sdw_bus m_rt_list node
165 */
166struct sdw_master_runtime {
167 struct sdw_bus *bus;
168 struct sdw_stream_runtime *stream;
169 enum sdw_data_direction direction;
170 unsigned int ch_count;
171 struct list_head slave_rt_list;
172 struct list_head port_list;
173 struct list_head stream_node;
174 struct list_head bus_node;
175};
176
177struct sdw_transport_data {
178 int hstart;
179 int hstop;
180 int block_offset;
181 int sub_block_offset;
182 unsigned int lane;
183};
184
185struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave,
186 enum sdw_data_direction direction,
187 unsigned int port_num);
188int sdw_configure_dpn_intr(struct sdw_slave *slave, int port,
189 bool enable, int mask);
190
191int sdw_transfer(struct sdw_bus *bus, struct sdw_msg *msg);
192int sdw_transfer_defer(struct sdw_bus *bus, struct sdw_msg *msg);
193
194#define SDW_READ_INTR_CLEAR_RETRY 10
195
196int sdw_fill_msg(struct sdw_msg *msg, struct sdw_slave *slave,
197 u32 addr, size_t count, u16 dev_num, u8 flags, u8 *buf);
198
199/* Fill transport parameter data structure */
200static inline void sdw_fill_xport_params(struct sdw_transport_params *params,
201 int port_num, bool grp_ctrl_valid,
202 int grp_ctrl, int sample_int,
203 int off1, int off2,
204 int hstart, int hstop,
205 int pack_mode, int lane_ctrl)
206{
207 params->port_num = port_num;
208 params->blk_grp_ctrl_valid = grp_ctrl_valid;
209 params->blk_grp_ctrl = grp_ctrl;
210 params->sample_interval = sample_int;
211 params->offset1 = off1;
212 params->offset2 = off2;
213 params->hstart = hstart;
214 params->hstop = hstop;
215 params->blk_pkg_mode = pack_mode;
216 params->lane_ctrl = lane_ctrl;
217}
218
219/* Fill port parameter data structure */
220static inline void sdw_fill_port_params(struct sdw_port_params *params,
221 int port_num, int bps,
222 int flow_mode, int data_mode)
223{
224 params->num = port_num;
225 params->bps = bps;
226 params->flow_mode = flow_mode;
227 params->data_mode = data_mode;
228}
229
230/* broadcast read/write for tests */
231int sdw_bread_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr);
232int sdw_bwrite_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr, u8 value);
233
234/*
235 * At the moment we only track Master-initiated hw_reset.
236 * Additional fields can be added as needed
237 */
238#define SDW_UNATTACH_REQUEST_MASTER_RESET BIT(0)
239
240void sdw_clear_slave_status(struct sdw_bus *bus, u32 request);
241int sdw_slave_modalias(const struct sdw_slave *slave, char *buf, size_t size);
242void sdw_compute_slave_ports(struct sdw_master_runtime *m_rt,
243 struct sdw_transport_data *t_data);
244
245#endif /* __SDW_BUS_H */