drivers/soundwire/bus.h

   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
  10 u64 sdw_dmi_override_adr(struct sdw_bus *bus, u64 addr);
  11
  12 #if IS_ENABLED(CONFIG_ACPI)
  13 int sdw_acpi_find_slaves(struct sdw_bus *bus);
  14 #else
  15 static inline int sdw_acpi_find_slaves(struct sdw_bus *bus)
  16 {
  17         return -ENOTSUPP;
  18 }
  19 #endif
  20
  21 int sdw_of_find_slaves(struct sdw_bus *bus);
  22 void sdw_extract_slave_id(struct sdw_bus *bus,
  23                           u64 addr, struct sdw_slave_id *id);
  24 int sdw_slave_add(struct sdw_bus *bus, struct sdw_slave_id *id,
  25                   struct fwnode_handle *fwnode);
  26 int sdw_master_device_add(struct sdw_bus *bus, struct device *parent,
  27                           struct fwnode_handle *fwnode);
  28 int sdw_master_device_del(struct sdw_bus *bus);
  29
  30 #ifdef CONFIG_DEBUG_FS
  31 void sdw_bus_debugfs_init(struct sdw_bus *bus);
  32 void sdw_bus_debugfs_exit(struct sdw_bus *bus);
  33 void sdw_slave_debugfs_init(struct sdw_slave *slave);
  34 void sdw_slave_debugfs_exit(struct sdw_slave *slave);
  35 void sdw_debugfs_init(void);
  36 void sdw_debugfs_exit(void);
  37 #else
  38 static inline void sdw_bus_debugfs_init(struct sdw_bus *bus) {}
  39 static inline void sdw_bus_debugfs_exit(struct sdw_bus *bus) {}
  40 static inline void sdw_slave_debugfs_init(struct sdw_slave *slave) {}
  41 static inline void sdw_slave_debugfs_exit(struct sdw_slave *slave) {}
  42 static inline void sdw_debugfs_init(void) {}
  43 static inline void sdw_debugfs_exit(void) {}
  44 #endif
  45
  46 enum {
  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  */
  63 struct 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 #define SDW_DOUBLE_RATE_FACTOR          2
  76 #define SDW_STRM_RATE_GROUPING          1
  77
  78 extern int sdw_rows[SDW_FRAME_ROWS];
  79 extern int sdw_cols[SDW_FRAME_COLS];
  80
  81 int sdw_find_row_index(int row);
  82 int sdw_find_col_index(int col);
  83
  84 /**
  85  * sdw_port_runtime: Runtime port parameters for Master or Slave
  86  *
  87  * @num: Port number. For audio streams, valid port number ranges from
  88  * [1,14]
  89  * @ch_mask: Channel mask
  90  * @transport_params: Transport parameters
  91  * @port_params: Port parameters
  92  * @port_node: List node for Master or Slave port_list
  93  *
  94  * SoundWire spec has no mention of ports for Master interface but the
  95  * concept is logically extended.
  96  */
  97 struct sdw_port_runtime {
  98         int num;
  99         int ch_mask;
 100         struct sdw_transport_params transport_params;
 101         struct sdw_port_params port_params;
 102         struct list_head port_node;
 103 };
 104
 105 /**
 106  * sdw_slave_runtime: Runtime Stream parameters for Slave
 107  *
 108  * @slave: Slave handle
 109  * @direction: Data direction for Slave
 110  * @ch_count: Number of channels handled by the Slave for
 111  * this stream
 112  * @m_rt_node: sdw_master_runtime list node
 113  * @port_list: List of Slave Ports configured for this stream
 114  */
 115 struct sdw_slave_runtime {
 116         struct sdw_slave *slave;
 117         enum sdw_data_direction direction;
 118         unsigned int ch_count;
 119         struct list_head m_rt_node;
 120         struct list_head port_list;
 121 };
 122
 123 /**
 124  * sdw_master_runtime: Runtime stream parameters for Master
 125  *
 126  * @bus: Bus handle
 127  * @stream: Stream runtime handle
 128  * @direction: Data direction for Master
 129  * @ch_count: Number of channels handled by the Master for
 130  * this stream, can be zero.
 131  * @slave_rt_list: Slave runtime list
 132  * @port_list: List of Master Ports configured for this stream, can be zero.
 133  * @stream_node: sdw_stream_runtime master_list node
 134  * @bus_node: sdw_bus m_rt_list node
 135  */
 136 struct sdw_master_runtime {
 137         struct sdw_bus *bus;
 138         struct sdw_stream_runtime *stream;
 139         enum sdw_data_direction direction;
 140         unsigned int ch_count;
 141         struct list_head slave_rt_list;
 142         struct list_head port_list;
 143         struct list_head stream_node;
 144         struct list_head bus_node;
 145 };
 146
 147 struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave,
 148                                             enum sdw_data_direction direction,
 149                                             unsigned int port_num);
 150 int sdw_configure_dpn_intr(struct sdw_slave *slave, int port,
 151                            bool enable, int mask);
 152
 153 int sdw_transfer(struct sdw_bus *bus, struct sdw_msg *msg);
 154 int sdw_transfer_defer(struct sdw_bus *bus, struct sdw_msg *msg,
 155                        struct sdw_defer *defer);
 156
 157 #define SDW_READ_INTR_CLEAR_RETRY       10
 158
 159 int sdw_fill_msg(struct sdw_msg *msg, struct sdw_slave *slave,
 160                  u32 addr, size_t count, u16 dev_num, u8 flags, u8 *buf);
 161
 162 /* Retrieve and return channel count from channel mask */
 163 static inline int sdw_ch_mask_to_ch(int ch_mask)
 164 {
 165         int c = 0;
 166
 167         for (c = 0; ch_mask; ch_mask >>= 1)
 168                 c += ch_mask & 1;
 169
 170         return c;
 171 }
 172
 173 /* Fill transport parameter data structure */
 174 static inline void sdw_fill_xport_params(struct sdw_transport_params *params,
 175                                          int port_num, bool grp_ctrl_valid,
 176                                          int grp_ctrl, int sample_int,
 177                                          int off1, int off2,
 178                                          int hstart, int hstop,
 179                                          int pack_mode, int lane_ctrl)
 180 {
 181         params->port_num = port_num;
 182         params->blk_grp_ctrl_valid = grp_ctrl_valid;
 183         params->blk_grp_ctrl = grp_ctrl;
 184         params->sample_interval = sample_int;
 185         params->offset1 = off1;
 186         params->offset2 = off2;
 187         params->hstart = hstart;
 188         params->hstop = hstop;
 189         params->blk_pkg_mode = pack_mode;
 190         params->lane_ctrl = lane_ctrl;
 191 }
 192
 193 /* Fill port parameter data structure */
 194 static inline void sdw_fill_port_params(struct sdw_port_params *params,
 195                                         int port_num, int bps,
 196                                         int flow_mode, int data_mode)
 197 {
 198         params->num = port_num;
 199         params->bps = bps;
 200         params->flow_mode = flow_mode;
 201         params->data_mode = data_mode;
 202 }
 203
 204 /* broadcast read/write for tests */
 205 int sdw_bread_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr);
 206 int sdw_bwrite_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr, u8 value);
 207
 208 /*
 209  * At the moment we only track Master-initiated hw_reset.
 210  * Additional fields can be added as needed
 211  */
 212 #define SDW_UNATTACH_REQUEST_MASTER_RESET       BIT(0)
 213
 214 void sdw_clear_slave_status(struct sdw_bus *bus, u32 request);
 215 int sdw_slave_modalias(const struct sdw_slave *slave, char *buf, size_t size);
 216
 217 #endif /* __SDW_BUS_H */