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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
2/* Copyright(c) 2015-17 Intel Corporation. */
3#include <sound/soc.h>
4
5#ifndef __SDW_CADENCE_H
6#define __SDW_CADENCE_H
7
8#define SDW_CADENCE_GSYNC_KHZ 4 /* 4 kHz */
9#define SDW_CADENCE_GSYNC_HZ (SDW_CADENCE_GSYNC_KHZ * 1000)
10
11/**
12 * struct sdw_cdns_pdi: PDI (Physical Data Interface) instance
13 *
14 * @num: pdi number
15 * @intel_alh_id: link identifier
16 * @l_ch_num: low channel for PDI
17 * @h_ch_num: high channel for PDI
18 * @ch_count: total channel count for PDI
19 * @dir: data direction
20 * @type: stream type, (only PCM supported)
21 */
22struct sdw_cdns_pdi {
23 int num;
24 int intel_alh_id;
25 int l_ch_num;
26 int h_ch_num;
27 int ch_count;
28 enum sdw_data_direction dir;
29 enum sdw_stream_type type;
30};
31
32/**
33 * struct sdw_cdns_streams: Cadence stream data structure
34 *
35 * @num_bd: number of bidirectional streams
36 * @num_in: number of input streams
37 * @num_out: number of output streams
38 * @num_ch_bd: number of bidirectional stream channels
39 * @num_ch_bd: number of input stream channels
40 * @num_ch_bd: number of output stream channels
41 * @num_pdi: total number of PDIs
42 * @bd: bidirectional streams
43 * @in: input streams
44 * @out: output streams
45 */
46struct sdw_cdns_streams {
47 unsigned int num_bd;
48 unsigned int num_in;
49 unsigned int num_out;
50 unsigned int num_ch_bd;
51 unsigned int num_ch_in;
52 unsigned int num_ch_out;
53 unsigned int num_pdi;
54 struct sdw_cdns_pdi *bd;
55 struct sdw_cdns_pdi *in;
56 struct sdw_cdns_pdi *out;
57};
58
59/**
60 * struct sdw_cdns_stream_config: stream configuration
61 *
62 * @pcm_bd: number of bidirectional PCM streams supported
63 * @pcm_in: number of input PCM streams supported
64 * @pcm_out: number of output PCM streams supported
65 */
66struct sdw_cdns_stream_config {
67 unsigned int pcm_bd;
68 unsigned int pcm_in;
69 unsigned int pcm_out;
70};
71
72/**
73 * struct sdw_cdns_dma_data: Cadence DMA data
74 *
75 * @name: SoundWire stream name
76 * @stream: stream runtime
77 * @pdi: PDI used for this dai
78 * @bus: Bus handle
79 * @stream_type: Stream type
80 * @link_id: Master link id
81 * @hw_params: hw_params to be applied in .prepare step
82 * @suspended: status set when suspended, to be used in .prepare
83 * @paused: status set in .trigger, to be used in suspend
84 */
85struct sdw_cdns_dma_data {
86 char *name;
87 struct sdw_stream_runtime *stream;
88 struct sdw_cdns_pdi *pdi;
89 struct sdw_bus *bus;
90 enum sdw_stream_type stream_type;
91 int link_id;
92 struct snd_pcm_hw_params *hw_params;
93 bool suspended;
94 bool paused;
95};
96
97/**
98 * struct sdw_cdns - Cadence driver context
99 * @dev: Linux device
100 * @bus: Bus handle
101 * @instance: instance number
102 * @response_buf: SoundWire response buffer
103 * @tx_complete: Tx completion
104 * @defer: Defer pointer
105 * @ports: Data ports
106 * @num_ports: Total number of data ports
107 * @pcm: PCM streams
108 * @registers: Cadence registers
109 * @link_up: Link status
110 * @msg_count: Messages sent on bus
111 */
112struct sdw_cdns {
113 struct device *dev;
114 struct sdw_bus bus;
115 unsigned int instance;
116
117 u32 response_buf[0x80];
118 struct completion tx_complete;
119 struct sdw_defer *defer;
120
121 struct sdw_cdns_port *ports;
122 int num_ports;
123
124 struct sdw_cdns_streams pcm;
125
126 int pdi_loopback_source;
127 int pdi_loopback_target;
128
129 void __iomem *registers;
130
131 bool link_up;
132 unsigned int msg_count;
133 bool interrupt_enabled;
134
135 struct work_struct work;
136
137 struct list_head list;
138};
139
140#define bus_to_cdns(_bus) container_of(_bus, struct sdw_cdns, bus)
141
142/* Exported symbols */
143
144int sdw_cdns_probe(struct sdw_cdns *cdns);
145extern struct sdw_master_ops sdw_cdns_master_ops;
146
147irqreturn_t sdw_cdns_irq(int irq, void *dev_id);
148irqreturn_t sdw_cdns_thread(int irq, void *dev_id);
149
150int sdw_cdns_init(struct sdw_cdns *cdns);
151int sdw_cdns_pdi_init(struct sdw_cdns *cdns,
152 struct sdw_cdns_stream_config config);
153int sdw_cdns_exit_reset(struct sdw_cdns *cdns);
154int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state);
155
156bool sdw_cdns_is_clock_stop(struct sdw_cdns *cdns);
157int sdw_cdns_clock_stop(struct sdw_cdns *cdns, bool block_wake);
158int sdw_cdns_clock_restart(struct sdw_cdns *cdns, bool bus_reset);
159
160#ifdef CONFIG_DEBUG_FS
161void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root);
162#endif
163
164struct sdw_cdns_pdi *sdw_cdns_alloc_pdi(struct sdw_cdns *cdns,
165 struct sdw_cdns_streams *stream,
166 u32 ch, u32 dir, int dai_id);
167void sdw_cdns_config_stream(struct sdw_cdns *cdns,
168 u32 ch, u32 dir, struct sdw_cdns_pdi *pdi);
169
170enum sdw_command_response
171cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num);
172
173enum sdw_command_response
174cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg);
175
176enum sdw_command_response
177cdns_xfer_msg_defer(struct sdw_bus *bus,
178 struct sdw_msg *msg, struct sdw_defer *defer);
179
180int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params);
181
182int cdns_set_sdw_stream(struct snd_soc_dai *dai,
183 void *stream, int direction);
184
185void sdw_cdns_check_self_clearing_bits(struct sdw_cdns *cdns, const char *string,
186 bool initial_delay, int reset_iterations);
187
188#endif /* __SDW_CADENCE_H */