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 #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
  19 int sdw_of_find_slaves(struct sdw_bus *bus);
  20 void sdw_extract_slave_id(struct sdw_bus *bus,
  21                           u64 addr, struct sdw_slave_id *id);
  22 int sdw_slave_add(struct sdw_bus *bus, struct sdw_slave_id *id,
  23                   struct fwnode_handle *fwnode);
  24 int sdw_master_device_add(struct sdw_bus *bus, struct device *parent,
  25                           struct fwnode_handle *fwnode);
  26 int sdw_master_device_del(struct sdw_bus *bus);
  27
  28 #ifdef CONFIG_DEBUG_FS
  29 void sdw_bus_debugfs_init(struct sdw_bus *bus);
  30 void sdw_bus_debugfs_exit(struct sdw_bus *bus);
  31 void sdw_slave_debugfs_init(struct sdw_slave *slave);
  32 void sdw_slave_debugfs_exit(struct sdw_slave *slave);
  33 void sdw_debugfs_init(void);
  34 void sdw_debugfs_exit(void);
  35 #else
  36 static inline void sdw_bus_debugfs_init(struct sdw_bus *bus) {}
  37 static inline void sdw_bus_debugfs_exit(struct sdw_bus *bus) {}
  38 static inline void sdw_slave_debugfs_init(struct sdw_slave *slave) {}
  39 static inline void sdw_slave_debugfs_exit(struct sdw_slave *slave) {}
  40 static inline void sdw_debugfs_init(void) {}
  41 static inline void sdw_debugfs_exit(void) {}
  42 #endif
  43
  44 enum {
  45         SDW_MSG_FLAG_READ = 0,
  46         SDW_MSG_FLAG_WRITE,
  47 };
  48
  49 /**
  50  * struct sdw_msg - Message structure
  51  * @addr: Register address accessed in the Slave
  52  * @len: number of messages
  53  * @dev_num: Slave device number
  54  * @addr_page1: SCP address page 1 Slave register
  55  * @addr_page2: SCP address page 2 Slave register
  56  * @flags: transfer flags, indicate if xfer is read or write
  57  * @buf: message data buffer
  58  * @ssp_sync: Send message at SSP (Stream Synchronization Point)
  59  * @page: address requires paging
  60  */
  61 struct sdw_msg {
  62         u16 addr;
  63         u16 len;
  64         u8 dev_num;
  65         u8 addr_page1;
  66         u8 addr_page2;
  67         u8 flags;
  68         u8 *buf;
  69         bool ssp_sync;
  70         bool page;
  71 };
  72
  73 #define SDW_DOUBLE_RATE_FACTOR          2
  74 #define SDW_STRM_RATE_GROUPING          1
  75
  76 extern int sdw_rows[SDW_FRAME_ROWS];
  77 extern int sdw_cols[SDW_FRAME_COLS];
  78
  79 int sdw_find_row_index(int row);
  80 int sdw_find_col_index(int col);
  81
  82 /**
  83  * sdw_port_runtime: Runtime port parameters for Master or Slave
  84  *
  85  * @num: Port number. For audio streams, valid port number ranges from
  86  * [1,14]
  87  * @ch_mask: Channel mask
  88  * @transport_params: Transport parameters
  89  * @port_params: Port parameters
  90  * @port_node: List node for Master or Slave port_list
  91  *
  92  * SoundWire spec has no mention of ports for Master interface but the
  93  * concept is logically extended.
  94  */
  95 struct sdw_port_runtime {
  96         int num;
  97         int ch_mask;
  98         struct sdw_transport_params transport_params;
  99         struct sdw_port_params port_params;
 100         struct list_head port_node;
 101 };
 102
 103 /**
 104  * sdw_slave_runtime: Runtime Stream parameters for Slave
 105  *
 106  * @slave: Slave handle
 107  * @direction: Data direction for Slave
 108  * @ch_count: Number of channels handled by the Slave for
 109  * this stream
 110  * @m_rt_node: sdw_master_runtime list node
 111  * @port_list: List of Slave Ports configured for this stream
 112  */
 113 struct sdw_slave_runtime {
 114         struct sdw_slave *slave;
 115         enum sdw_data_direction direction;
 116         unsigned int ch_count;
 117         struct list_head m_rt_node;
 118         struct list_head port_list;
 119 };
 120
 121 /**
 122  * sdw_master_runtime: Runtime stream parameters for Master
 123  *
 124  * @bus: Bus handle
 125  * @stream: Stream runtime handle
 126  * @direction: Data direction for Master
 127  * @ch_count: Number of channels handled by the Master for
 128  * this stream, can be zero.
 129  * @slave_rt_list: Slave runtime list
 130  * @port_list: List of Master Ports configured for this stream, can be zero.
 131  * @stream_node: sdw_stream_runtime master_list node
 132  * @bus_node: sdw_bus m_rt_list node
 133  */
 134 struct sdw_master_runtime {
 135         struct sdw_bus *bus;
 136         struct sdw_stream_runtime *stream;
 137         enum sdw_data_direction direction;
 138         unsigned int ch_count;
 139         struct list_head slave_rt_list;
 140         struct list_head port_list;
 141         struct list_head stream_node;
 142         struct list_head bus_node;
 143 };
 144
 145 struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave,
 146                                             enum sdw_data_direction direction,
 147                                             unsigned int port_num);
 148 int sdw_configure_dpn_intr(struct sdw_slave *slave, int port,
 149                            bool enable, int mask);
 150
 151 int sdw_transfer(struct sdw_bus *bus, struct sdw_msg *msg);
 152 int sdw_transfer_defer(struct sdw_bus *bus, struct sdw_msg *msg,
 153                        struct sdw_defer *defer);
 154
 155 #define SDW_READ_INTR_CLEAR_RETRY       10
 156
 157 int sdw_fill_msg(struct sdw_msg *msg, struct sdw_slave *slave,
 158                  u32 addr, size_t count, u16 dev_num, u8 flags, u8 *buf);
 159
 160 /* Retrieve and return channel count from channel mask */
 161 static inline int sdw_ch_mask_to_ch(int ch_mask)
 162 {
 163         int c = 0;
 164
 165         for (c = 0; ch_mask; ch_mask >>= 1)
 166                 c += ch_mask & 1;
 167
 168         return c;
 169 }
 170
 171 /* Fill transport parameter data structure */
 172 static inline void sdw_fill_xport_params(struct sdw_transport_params *params,
 173                                          int port_num, bool grp_ctrl_valid,
 174                                          int grp_ctrl, int sample_int,
 175                                          int off1, int off2,
 176                                          int hstart, int hstop,
 177                                          int pack_mode, int lane_ctrl)
 178 {
 179         params->port_num = port_num;
 180         params->blk_grp_ctrl_valid = grp_ctrl_valid;
 181         params->blk_grp_ctrl = grp_ctrl;
 182         params->sample_interval = sample_int;
 183         params->offset1 = off1;
 184         params->offset2 = off2;
 185         params->hstart = hstart;
 186         params->hstop = hstop;
 187         params->blk_pkg_mode = pack_mode;
 188         params->lane_ctrl = lane_ctrl;
 189 }
 190
 191 /* Fill port parameter data structure */
 192 static inline void sdw_fill_port_params(struct sdw_port_params *params,
 193                                         int port_num, int bps,
 194                                         int flow_mode, int data_mode)
 195 {
 196         params->num = port_num;
 197         params->bps = bps;
 198         params->flow_mode = flow_mode;
 199         params->data_mode = data_mode;
 200 }
 201
 202 /* Read-Modify-Write Slave register */
 203 static inline int sdw_update(struct sdw_slave *slave, u32 addr, u8 mask, u8 val)
 204 {
 205         int tmp;
 206
 207         tmp = sdw_read(slave, addr);
 208         if (tmp < 0)
 209                 return tmp;
 210
 211         tmp = (tmp & ~mask) | val;
 212         return sdw_write(slave, addr, tmp);
 213 }
 214
 215 /* broadcast read/write for tests */
 216 int sdw_bread_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr);
 217 int sdw_bwrite_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr, u8 value);
 218
 219 /*
 220  * At the moment we only track Master-initiated hw_reset.
 221  * Additional fields can be added as needed
 222  */
 223 #define SDW_UNATTACH_REQUEST_MASTER_RESET       BIT(0)
 224
 225 void sdw_clear_slave_status(struct sdw_bus *bus, u32 request);
 226 int sdw_slave_modalias(const struct sdw_slave *slave, char *buf, size_t size);
 227
 228 #endif /* __SDW_BUS_H */