Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 1 | // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) |
| 2 | // Copyright(c) 2015-17 Intel Corporation. |
| 3 | |
| 4 | /* |
| 5 | * Cadence SoundWire Master module |
| 6 | * Used by Master driver |
| 7 | */ |
| 8 | |
| 9 | #include <linux/delay.h> |
| 10 | #include <linux/device.h> |
| 11 | #include <linux/interrupt.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/mod_devicetable.h> |
| 14 | #include <linux/soundwire/sdw_registers.h> |
| 15 | #include <linux/soundwire/sdw.h> |
Vinod Koul | 5d6b3c8 | 2018-04-26 18:38:53 +0530 | [diff] [blame] | 16 | #include <sound/pcm_params.h> |
| 17 | #include <sound/soc.h> |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 18 | #include "bus.h" |
| 19 | #include "cadence_master.h" |
| 20 | |
| 21 | #define CDNS_MCP_CONFIG 0x0 |
| 22 | |
| 23 | #define CDNS_MCP_CONFIG_MCMD_RETRY GENMASK(27, 24) |
| 24 | #define CDNS_MCP_CONFIG_MPREQ_DELAY GENMASK(20, 16) |
| 25 | #define CDNS_MCP_CONFIG_MMASTER BIT(7) |
| 26 | #define CDNS_MCP_CONFIG_BUS_REL BIT(6) |
| 27 | #define CDNS_MCP_CONFIG_SNIFFER BIT(5) |
| 28 | #define CDNS_MCP_CONFIG_SSPMOD BIT(4) |
| 29 | #define CDNS_MCP_CONFIG_CMD BIT(3) |
| 30 | #define CDNS_MCP_CONFIG_OP GENMASK(2, 0) |
| 31 | #define CDNS_MCP_CONFIG_OP_NORMAL 0 |
| 32 | |
| 33 | #define CDNS_MCP_CONTROL 0x4 |
| 34 | |
| 35 | #define CDNS_MCP_CONTROL_RST_DELAY GENMASK(10, 8) |
| 36 | #define CDNS_MCP_CONTROL_CMD_RST BIT(7) |
| 37 | #define CDNS_MCP_CONTROL_SOFT_RST BIT(6) |
| 38 | #define CDNS_MCP_CONTROL_SW_RST BIT(5) |
| 39 | #define CDNS_MCP_CONTROL_HW_RST BIT(4) |
| 40 | #define CDNS_MCP_CONTROL_CLK_PAUSE BIT(3) |
| 41 | #define CDNS_MCP_CONTROL_CLK_STOP_CLR BIT(2) |
| 42 | #define CDNS_MCP_CONTROL_CMD_ACCEPT BIT(1) |
| 43 | #define CDNS_MCP_CONTROL_BLOCK_WAKEUP BIT(0) |
| 44 | |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 45 | #define CDNS_MCP_CMDCTRL 0x8 |
| 46 | #define CDNS_MCP_SSPSTAT 0xC |
| 47 | #define CDNS_MCP_FRAME_SHAPE 0x10 |
| 48 | #define CDNS_MCP_FRAME_SHAPE_INIT 0x14 |
| 49 | |
| 50 | #define CDNS_MCP_CONFIG_UPDATE 0x18 |
| 51 | #define CDNS_MCP_CONFIG_UPDATE_BIT BIT(0) |
| 52 | |
| 53 | #define CDNS_MCP_PHYCTRL 0x1C |
| 54 | #define CDNS_MCP_SSP_CTRL0 0x20 |
| 55 | #define CDNS_MCP_SSP_CTRL1 0x28 |
| 56 | #define CDNS_MCP_CLK_CTRL0 0x30 |
| 57 | #define CDNS_MCP_CLK_CTRL1 0x38 |
| 58 | |
| 59 | #define CDNS_MCP_STAT 0x40 |
| 60 | |
| 61 | #define CDNS_MCP_STAT_ACTIVE_BANK BIT(20) |
| 62 | #define CDNS_MCP_STAT_CLK_STOP BIT(16) |
| 63 | |
| 64 | #define CDNS_MCP_INTSTAT 0x44 |
| 65 | #define CDNS_MCP_INTMASK 0x48 |
| 66 | |
| 67 | #define CDNS_MCP_INT_IRQ BIT(31) |
| 68 | #define CDNS_MCP_INT_WAKEUP BIT(16) |
| 69 | #define CDNS_MCP_INT_SLAVE_RSVD BIT(15) |
| 70 | #define CDNS_MCP_INT_SLAVE_ALERT BIT(14) |
| 71 | #define CDNS_MCP_INT_SLAVE_ATTACH BIT(13) |
| 72 | #define CDNS_MCP_INT_SLAVE_NATTACH BIT(12) |
| 73 | #define CDNS_MCP_INT_SLAVE_MASK GENMASK(15, 12) |
| 74 | #define CDNS_MCP_INT_DPINT BIT(11) |
| 75 | #define CDNS_MCP_INT_CTRL_CLASH BIT(10) |
| 76 | #define CDNS_MCP_INT_DATA_CLASH BIT(9) |
| 77 | #define CDNS_MCP_INT_CMD_ERR BIT(7) |
| 78 | #define CDNS_MCP_INT_RX_WL BIT(2) |
| 79 | #define CDNS_MCP_INT_TXE BIT(1) |
| 80 | |
| 81 | #define CDNS_MCP_INTSET 0x4C |
| 82 | |
| 83 | #define CDNS_SDW_SLAVE_STAT 0x50 |
| 84 | #define CDNS_MCP_SLAVE_STAT_MASK BIT(1, 0) |
| 85 | |
| 86 | #define CDNS_MCP_SLAVE_INTSTAT0 0x54 |
| 87 | #define CDNS_MCP_SLAVE_INTSTAT1 0x58 |
| 88 | #define CDNS_MCP_SLAVE_INTSTAT_NPRESENT BIT(0) |
| 89 | #define CDNS_MCP_SLAVE_INTSTAT_ATTACHED BIT(1) |
| 90 | #define CDNS_MCP_SLAVE_INTSTAT_ALERT BIT(2) |
| 91 | #define CDNS_MCP_SLAVE_INTSTAT_RESERVED BIT(3) |
| 92 | #define CDNS_MCP_SLAVE_STATUS_BITS GENMASK(3, 0) |
| 93 | #define CDNS_MCP_SLAVE_STATUS_NUM 4 |
| 94 | |
| 95 | #define CDNS_MCP_SLAVE_INTMASK0 0x5C |
| 96 | #define CDNS_MCP_SLAVE_INTMASK1 0x60 |
| 97 | |
| 98 | #define CDNS_MCP_SLAVE_INTMASK0_MASK GENMASK(30, 0) |
| 99 | #define CDNS_MCP_SLAVE_INTMASK1_MASK GENMASK(16, 0) |
| 100 | |
| 101 | #define CDNS_MCP_PORT_INTSTAT 0x64 |
| 102 | #define CDNS_MCP_PDI_STAT 0x6C |
| 103 | |
| 104 | #define CDNS_MCP_FIFOLEVEL 0x78 |
| 105 | #define CDNS_MCP_FIFOSTAT 0x7C |
| 106 | #define CDNS_MCP_RX_FIFO_AVAIL GENMASK(5, 0) |
| 107 | |
| 108 | #define CDNS_MCP_CMD_BASE 0x80 |
| 109 | #define CDNS_MCP_RESP_BASE 0x80 |
| 110 | #define CDNS_MCP_CMD_LEN 0x20 |
| 111 | #define CDNS_MCP_CMD_WORD_LEN 0x4 |
| 112 | |
| 113 | #define CDNS_MCP_CMD_SSP_TAG BIT(31) |
| 114 | #define CDNS_MCP_CMD_COMMAND GENMASK(30, 28) |
| 115 | #define CDNS_MCP_CMD_DEV_ADDR GENMASK(27, 24) |
| 116 | #define CDNS_MCP_CMD_REG_ADDR_H GENMASK(23, 16) |
| 117 | #define CDNS_MCP_CMD_REG_ADDR_L GENMASK(15, 8) |
| 118 | #define CDNS_MCP_CMD_REG_DATA GENMASK(7, 0) |
| 119 | |
| 120 | #define CDNS_MCP_CMD_READ 2 |
| 121 | #define CDNS_MCP_CMD_WRITE 3 |
| 122 | |
| 123 | #define CDNS_MCP_RESP_RDATA GENMASK(15, 8) |
| 124 | #define CDNS_MCP_RESP_ACK BIT(0) |
| 125 | #define CDNS_MCP_RESP_NACK BIT(1) |
| 126 | |
| 127 | #define CDNS_DP_SIZE 128 |
| 128 | |
| 129 | #define CDNS_DPN_B0_CONFIG(n) (0x100 + CDNS_DP_SIZE * (n)) |
| 130 | #define CDNS_DPN_B0_CH_EN(n) (0x104 + CDNS_DP_SIZE * (n)) |
| 131 | #define CDNS_DPN_B0_SAMPLE_CTRL(n) (0x108 + CDNS_DP_SIZE * (n)) |
| 132 | #define CDNS_DPN_B0_OFFSET_CTRL(n) (0x10C + CDNS_DP_SIZE * (n)) |
| 133 | #define CDNS_DPN_B0_HCTRL(n) (0x110 + CDNS_DP_SIZE * (n)) |
| 134 | #define CDNS_DPN_B0_ASYNC_CTRL(n) (0x114 + CDNS_DP_SIZE * (n)) |
| 135 | |
| 136 | #define CDNS_DPN_B1_CONFIG(n) (0x118 + CDNS_DP_SIZE * (n)) |
| 137 | #define CDNS_DPN_B1_CH_EN(n) (0x11C + CDNS_DP_SIZE * (n)) |
| 138 | #define CDNS_DPN_B1_SAMPLE_CTRL(n) (0x120 + CDNS_DP_SIZE * (n)) |
| 139 | #define CDNS_DPN_B1_OFFSET_CTRL(n) (0x124 + CDNS_DP_SIZE * (n)) |
| 140 | #define CDNS_DPN_B1_HCTRL(n) (0x128 + CDNS_DP_SIZE * (n)) |
| 141 | #define CDNS_DPN_B1_ASYNC_CTRL(n) (0x12C + CDNS_DP_SIZE * (n)) |
| 142 | |
| 143 | #define CDNS_DPN_CONFIG_BPM BIT(18) |
| 144 | #define CDNS_DPN_CONFIG_BGC GENMASK(17, 16) |
| 145 | #define CDNS_DPN_CONFIG_WL GENMASK(12, 8) |
| 146 | #define CDNS_DPN_CONFIG_PORT_DAT GENMASK(3, 2) |
| 147 | #define CDNS_DPN_CONFIG_PORT_FLOW GENMASK(1, 0) |
| 148 | |
| 149 | #define CDNS_DPN_SAMPLE_CTRL_SI GENMASK(15, 0) |
| 150 | |
| 151 | #define CDNS_DPN_OFFSET_CTRL_1 GENMASK(7, 0) |
| 152 | #define CDNS_DPN_OFFSET_CTRL_2 GENMASK(15, 8) |
| 153 | |
| 154 | #define CDNS_DPN_HCTRL_HSTOP GENMASK(3, 0) |
| 155 | #define CDNS_DPN_HCTRL_HSTART GENMASK(7, 4) |
| 156 | #define CDNS_DPN_HCTRL_LCTRL GENMASK(10, 8) |
| 157 | |
| 158 | #define CDNS_PORTCTRL 0x130 |
| 159 | #define CDNS_PORTCTRL_DIRN BIT(7) |
| 160 | #define CDNS_PORTCTRL_BANK_INVERT BIT(8) |
| 161 | |
| 162 | #define CDNS_PORT_OFFSET 0x80 |
| 163 | |
| 164 | #define CDNS_PDI_CONFIG(n) (0x1100 + (n) * 16) |
| 165 | |
| 166 | #define CDNS_PDI_CONFIG_SOFT_RESET BIT(24) |
| 167 | #define CDNS_PDI_CONFIG_CHANNEL GENMASK(15, 8) |
| 168 | #define CDNS_PDI_CONFIG_PORT GENMASK(4, 0) |
| 169 | |
| 170 | /* Driver defaults */ |
| 171 | |
| 172 | #define CDNS_DEFAULT_CLK_DIVIDER 0 |
| 173 | #define CDNS_DEFAULT_FRAME_SHAPE 0x30 |
| 174 | #define CDNS_DEFAULT_SSP_INTERVAL 0x18 |
| 175 | #define CDNS_TX_TIMEOUT 2000 |
| 176 | |
| 177 | #define CDNS_PCM_PDI_OFFSET 0x2 |
| 178 | #define CDNS_PDM_PDI_OFFSET 0x6 |
| 179 | |
| 180 | #define CDNS_SCP_RX_FIFOLEVEL 0x2 |
| 181 | |
| 182 | /* |
| 183 | * register accessor helpers |
| 184 | */ |
| 185 | static inline u32 cdns_readl(struct sdw_cdns *cdns, int offset) |
| 186 | { |
| 187 | return readl(cdns->registers + offset); |
| 188 | } |
| 189 | |
| 190 | static inline void cdns_writel(struct sdw_cdns *cdns, int offset, u32 value) |
| 191 | { |
| 192 | writel(value, cdns->registers + offset); |
| 193 | } |
| 194 | |
| 195 | static inline void cdns_updatel(struct sdw_cdns *cdns, |
| 196 | int offset, u32 mask, u32 val) |
| 197 | { |
| 198 | u32 tmp; |
| 199 | |
| 200 | tmp = cdns_readl(cdns, offset); |
| 201 | tmp = (tmp & ~mask) | val; |
| 202 | cdns_writel(cdns, offset, tmp); |
| 203 | } |
| 204 | |
| 205 | static int cdns_clear_bit(struct sdw_cdns *cdns, int offset, u32 value) |
| 206 | { |
| 207 | int timeout = 10; |
| 208 | u32 reg_read; |
| 209 | |
| 210 | writel(value, cdns->registers + offset); |
| 211 | |
| 212 | /* Wait for bit to be self cleared */ |
| 213 | do { |
| 214 | reg_read = readl(cdns->registers + offset); |
| 215 | if ((reg_read & value) == 0) |
| 216 | return 0; |
| 217 | |
| 218 | timeout--; |
| 219 | udelay(50); |
| 220 | } while (timeout != 0); |
| 221 | |
| 222 | return -EAGAIN; |
| 223 | } |
| 224 | |
| 225 | /* |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 226 | * IO Calls |
| 227 | */ |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 228 | static enum sdw_command_response |
| 229 | cdns_fill_msg_resp(struct sdw_cdns *cdns, |
| 230 | struct sdw_msg *msg, int count, int offset) |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 231 | { |
| 232 | int nack = 0, no_ack = 0; |
| 233 | int i; |
| 234 | |
| 235 | /* check message response */ |
| 236 | for (i = 0; i < count; i++) { |
| 237 | if (!(cdns->response_buf[i] & CDNS_MCP_RESP_ACK)) { |
| 238 | no_ack = 1; |
| 239 | dev_dbg(cdns->dev, "Msg Ack not received\n"); |
| 240 | if (cdns->response_buf[i] & CDNS_MCP_RESP_NACK) { |
| 241 | nack = 1; |
| 242 | dev_err(cdns->dev, "Msg NACK received\n"); |
| 243 | } |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | if (nack) { |
| 248 | dev_err(cdns->dev, "Msg NACKed for Slave %d\n", msg->dev_num); |
| 249 | return SDW_CMD_FAIL; |
| 250 | } else if (no_ack) { |
| 251 | dev_dbg(cdns->dev, "Msg ignored for Slave %d\n", msg->dev_num); |
| 252 | return SDW_CMD_IGNORED; |
| 253 | } |
| 254 | |
| 255 | /* fill response */ |
| 256 | for (i = 0; i < count; i++) |
| 257 | msg->buf[i + offset] = cdns->response_buf[i] >> |
| 258 | SDW_REG_SHIFT(CDNS_MCP_RESP_RDATA); |
| 259 | |
| 260 | return SDW_CMD_OK; |
| 261 | } |
| 262 | |
| 263 | static enum sdw_command_response |
| 264 | _cdns_xfer_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int cmd, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 265 | int offset, int count, bool defer) |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 266 | { |
| 267 | unsigned long time; |
| 268 | u32 base, i, data; |
| 269 | u16 addr; |
| 270 | |
| 271 | /* Program the watermark level for RX FIFO */ |
| 272 | if (cdns->msg_count != count) { |
| 273 | cdns_writel(cdns, CDNS_MCP_FIFOLEVEL, count); |
| 274 | cdns->msg_count = count; |
| 275 | } |
| 276 | |
| 277 | base = CDNS_MCP_CMD_BASE; |
| 278 | addr = msg->addr; |
| 279 | |
| 280 | for (i = 0; i < count; i++) { |
| 281 | data = msg->dev_num << SDW_REG_SHIFT(CDNS_MCP_CMD_DEV_ADDR); |
| 282 | data |= cmd << SDW_REG_SHIFT(CDNS_MCP_CMD_COMMAND); |
| 283 | data |= addr++ << SDW_REG_SHIFT(CDNS_MCP_CMD_REG_ADDR_L); |
| 284 | |
| 285 | if (msg->flags == SDW_MSG_FLAG_WRITE) |
| 286 | data |= msg->buf[i + offset]; |
| 287 | |
| 288 | data |= msg->ssp_sync << SDW_REG_SHIFT(CDNS_MCP_CMD_SSP_TAG); |
| 289 | cdns_writel(cdns, base, data); |
| 290 | base += CDNS_MCP_CMD_WORD_LEN; |
| 291 | } |
| 292 | |
| 293 | if (defer) |
| 294 | return SDW_CMD_OK; |
| 295 | |
| 296 | /* wait for timeout or response */ |
| 297 | time = wait_for_completion_timeout(&cdns->tx_complete, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 298 | msecs_to_jiffies(CDNS_TX_TIMEOUT)); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 299 | if (!time) { |
| 300 | dev_err(cdns->dev, "IO transfer timed out\n"); |
| 301 | msg->len = 0; |
| 302 | return SDW_CMD_TIMEOUT; |
| 303 | } |
| 304 | |
| 305 | return cdns_fill_msg_resp(cdns, msg, count, offset); |
| 306 | } |
| 307 | |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 308 | static enum sdw_command_response |
| 309 | cdns_program_scp_addr(struct sdw_cdns *cdns, struct sdw_msg *msg) |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 310 | { |
| 311 | int nack = 0, no_ack = 0; |
| 312 | unsigned long time; |
| 313 | u32 data[2], base; |
| 314 | int i; |
| 315 | |
| 316 | /* Program the watermark level for RX FIFO */ |
| 317 | if (cdns->msg_count != CDNS_SCP_RX_FIFOLEVEL) { |
| 318 | cdns_writel(cdns, CDNS_MCP_FIFOLEVEL, CDNS_SCP_RX_FIFOLEVEL); |
| 319 | cdns->msg_count = CDNS_SCP_RX_FIFOLEVEL; |
| 320 | } |
| 321 | |
| 322 | data[0] = msg->dev_num << SDW_REG_SHIFT(CDNS_MCP_CMD_DEV_ADDR); |
| 323 | data[0] |= 0x3 << SDW_REG_SHIFT(CDNS_MCP_CMD_COMMAND); |
| 324 | data[1] = data[0]; |
| 325 | |
| 326 | data[0] |= SDW_SCP_ADDRPAGE1 << SDW_REG_SHIFT(CDNS_MCP_CMD_REG_ADDR_L); |
| 327 | data[1] |= SDW_SCP_ADDRPAGE2 << SDW_REG_SHIFT(CDNS_MCP_CMD_REG_ADDR_L); |
| 328 | |
| 329 | data[0] |= msg->addr_page1; |
| 330 | data[1] |= msg->addr_page2; |
| 331 | |
| 332 | base = CDNS_MCP_CMD_BASE; |
| 333 | cdns_writel(cdns, base, data[0]); |
| 334 | base += CDNS_MCP_CMD_WORD_LEN; |
| 335 | cdns_writel(cdns, base, data[1]); |
| 336 | |
| 337 | time = wait_for_completion_timeout(&cdns->tx_complete, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 338 | msecs_to_jiffies(CDNS_TX_TIMEOUT)); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 339 | if (!time) { |
| 340 | dev_err(cdns->dev, "SCP Msg trf timed out\n"); |
| 341 | msg->len = 0; |
| 342 | return SDW_CMD_TIMEOUT; |
| 343 | } |
| 344 | |
| 345 | /* check response the writes */ |
| 346 | for (i = 0; i < 2; i++) { |
| 347 | if (!(cdns->response_buf[i] & CDNS_MCP_RESP_ACK)) { |
| 348 | no_ack = 1; |
Pierre-Louis Bossart | 17ed5be | 2019-05-01 10:57:45 -0500 | [diff] [blame] | 349 | dev_err(cdns->dev, "Program SCP Ack not received\n"); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 350 | if (cdns->response_buf[i] & CDNS_MCP_RESP_NACK) { |
| 351 | nack = 1; |
Pierre-Louis Bossart | 17ed5be | 2019-05-01 10:57:45 -0500 | [diff] [blame] | 352 | dev_err(cdns->dev, "Program SCP NACK received\n"); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 353 | } |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | /* For NACK, NO ack, don't return err if we are in Broadcast mode */ |
| 358 | if (nack) { |
| 359 | dev_err(cdns->dev, |
Pierre-Louis Bossart | 17ed5be | 2019-05-01 10:57:45 -0500 | [diff] [blame] | 360 | "SCP_addrpage NACKed for Slave %d\n", msg->dev_num); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 361 | return SDW_CMD_FAIL; |
| 362 | } else if (no_ack) { |
| 363 | dev_dbg(cdns->dev, |
Pierre-Louis Bossart | 17ed5be | 2019-05-01 10:57:45 -0500 | [diff] [blame] | 364 | "SCP_addrpage ignored for Slave %d\n", msg->dev_num); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 365 | return SDW_CMD_IGNORED; |
| 366 | } |
| 367 | |
| 368 | return SDW_CMD_OK; |
| 369 | } |
| 370 | |
| 371 | static int cdns_prep_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int *cmd) |
| 372 | { |
| 373 | int ret; |
| 374 | |
| 375 | if (msg->page) { |
| 376 | ret = cdns_program_scp_addr(cdns, msg); |
| 377 | if (ret) { |
| 378 | msg->len = 0; |
| 379 | return ret; |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | switch (msg->flags) { |
| 384 | case SDW_MSG_FLAG_READ: |
| 385 | *cmd = CDNS_MCP_CMD_READ; |
| 386 | break; |
| 387 | |
| 388 | case SDW_MSG_FLAG_WRITE: |
| 389 | *cmd = CDNS_MCP_CMD_WRITE; |
| 390 | break; |
| 391 | |
| 392 | default: |
| 393 | dev_err(cdns->dev, "Invalid msg cmd: %d\n", msg->flags); |
| 394 | return -EINVAL; |
| 395 | } |
| 396 | |
| 397 | return 0; |
| 398 | } |
| 399 | |
Shreyas NC | c91605f | 2018-04-26 18:38:43 +0530 | [diff] [blame] | 400 | enum sdw_command_response |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 401 | cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg) |
| 402 | { |
| 403 | struct sdw_cdns *cdns = bus_to_cdns(bus); |
| 404 | int cmd = 0, ret, i; |
| 405 | |
| 406 | ret = cdns_prep_msg(cdns, msg, &cmd); |
| 407 | if (ret) |
| 408 | return SDW_CMD_FAIL_OTHER; |
| 409 | |
| 410 | for (i = 0; i < msg->len / CDNS_MCP_CMD_LEN; i++) { |
| 411 | ret = _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 412 | CDNS_MCP_CMD_LEN, false); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 413 | if (ret < 0) |
| 414 | goto exit; |
| 415 | } |
| 416 | |
| 417 | if (!(msg->len % CDNS_MCP_CMD_LEN)) |
| 418 | goto exit; |
| 419 | |
| 420 | ret = _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 421 | msg->len % CDNS_MCP_CMD_LEN, false); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 422 | |
| 423 | exit: |
| 424 | return ret; |
| 425 | } |
Shreyas NC | c91605f | 2018-04-26 18:38:43 +0530 | [diff] [blame] | 426 | EXPORT_SYMBOL(cdns_xfer_msg); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 427 | |
Shreyas NC | c91605f | 2018-04-26 18:38:43 +0530 | [diff] [blame] | 428 | enum sdw_command_response |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 429 | cdns_xfer_msg_defer(struct sdw_bus *bus, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 430 | struct sdw_msg *msg, struct sdw_defer *defer) |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 431 | { |
| 432 | struct sdw_cdns *cdns = bus_to_cdns(bus); |
| 433 | int cmd = 0, ret; |
| 434 | |
| 435 | /* for defer only 1 message is supported */ |
| 436 | if (msg->len > 1) |
| 437 | return -ENOTSUPP; |
| 438 | |
| 439 | ret = cdns_prep_msg(cdns, msg, &cmd); |
| 440 | if (ret) |
| 441 | return SDW_CMD_FAIL_OTHER; |
| 442 | |
| 443 | cdns->defer = defer; |
| 444 | cdns->defer->length = msg->len; |
| 445 | |
| 446 | return _cdns_xfer_msg(cdns, msg, cmd, 0, msg->len, true); |
| 447 | } |
Shreyas NC | c91605f | 2018-04-26 18:38:43 +0530 | [diff] [blame] | 448 | EXPORT_SYMBOL(cdns_xfer_msg_defer); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 449 | |
Shreyas NC | c91605f | 2018-04-26 18:38:43 +0530 | [diff] [blame] | 450 | enum sdw_command_response |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 451 | cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num) |
| 452 | { |
| 453 | struct sdw_cdns *cdns = bus_to_cdns(bus); |
| 454 | struct sdw_msg msg; |
| 455 | |
| 456 | /* Create dummy message with valid device number */ |
| 457 | memset(&msg, 0, sizeof(msg)); |
| 458 | msg.dev_num = dev_num; |
| 459 | |
| 460 | return cdns_program_scp_addr(cdns, &msg); |
| 461 | } |
Shreyas NC | c91605f | 2018-04-26 18:38:43 +0530 | [diff] [blame] | 462 | EXPORT_SYMBOL(cdns_reset_page_addr); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 463 | |
| 464 | /* |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 465 | * IRQ handling |
| 466 | */ |
| 467 | |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 468 | static void cdns_read_response(struct sdw_cdns *cdns) |
| 469 | { |
| 470 | u32 num_resp, cmd_base; |
| 471 | int i; |
| 472 | |
| 473 | num_resp = cdns_readl(cdns, CDNS_MCP_FIFOSTAT); |
| 474 | num_resp &= CDNS_MCP_RX_FIFO_AVAIL; |
| 475 | |
| 476 | cmd_base = CDNS_MCP_CMD_BASE; |
| 477 | |
| 478 | for (i = 0; i < num_resp; i++) { |
| 479 | cdns->response_buf[i] = cdns_readl(cdns, cmd_base); |
| 480 | cmd_base += CDNS_MCP_CMD_WORD_LEN; |
| 481 | } |
| 482 | } |
| 483 | |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 484 | static int cdns_update_slave_status(struct sdw_cdns *cdns, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 485 | u32 slave0, u32 slave1) |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 486 | { |
| 487 | enum sdw_slave_status status[SDW_MAX_DEVICES + 1]; |
| 488 | bool is_slave = false; |
| 489 | u64 slave, mask; |
| 490 | int i, set_status; |
| 491 | |
| 492 | /* combine the two status */ |
| 493 | slave = ((u64)slave1 << 32) | slave0; |
| 494 | memset(status, 0, sizeof(status)); |
| 495 | |
| 496 | for (i = 0; i <= SDW_MAX_DEVICES; i++) { |
| 497 | mask = (slave >> (i * CDNS_MCP_SLAVE_STATUS_NUM)) & |
| 498 | CDNS_MCP_SLAVE_STATUS_BITS; |
| 499 | if (!mask) |
| 500 | continue; |
| 501 | |
| 502 | is_slave = true; |
| 503 | set_status = 0; |
| 504 | |
| 505 | if (mask & CDNS_MCP_SLAVE_INTSTAT_RESERVED) { |
| 506 | status[i] = SDW_SLAVE_RESERVED; |
| 507 | set_status++; |
| 508 | } |
| 509 | |
| 510 | if (mask & CDNS_MCP_SLAVE_INTSTAT_ATTACHED) { |
| 511 | status[i] = SDW_SLAVE_ATTACHED; |
| 512 | set_status++; |
| 513 | } |
| 514 | |
| 515 | if (mask & CDNS_MCP_SLAVE_INTSTAT_ALERT) { |
| 516 | status[i] = SDW_SLAVE_ALERT; |
| 517 | set_status++; |
| 518 | } |
| 519 | |
| 520 | if (mask & CDNS_MCP_SLAVE_INTSTAT_NPRESENT) { |
| 521 | status[i] = SDW_SLAVE_UNATTACHED; |
| 522 | set_status++; |
| 523 | } |
| 524 | |
| 525 | /* first check if Slave reported multiple status */ |
| 526 | if (set_status > 1) { |
| 527 | dev_warn(cdns->dev, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 528 | "Slave reported multiple Status: %d\n", |
| 529 | status[i]); |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 530 | /* |
| 531 | * TODO: we need to reread the status here by |
| 532 | * issuing a PING cmd |
| 533 | */ |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | if (is_slave) |
| 538 | return sdw_handle_slave_status(&cdns->bus, status); |
| 539 | |
| 540 | return 0; |
| 541 | } |
| 542 | |
| 543 | /** |
| 544 | * sdw_cdns_irq() - Cadence interrupt handler |
| 545 | * @irq: irq number |
| 546 | * @dev_id: irq context |
| 547 | */ |
| 548 | irqreturn_t sdw_cdns_irq(int irq, void *dev_id) |
| 549 | { |
| 550 | struct sdw_cdns *cdns = dev_id; |
| 551 | u32 int_status; |
| 552 | int ret = IRQ_HANDLED; |
| 553 | |
| 554 | /* Check if the link is up */ |
| 555 | if (!cdns->link_up) |
| 556 | return IRQ_NONE; |
| 557 | |
| 558 | int_status = cdns_readl(cdns, CDNS_MCP_INTSTAT); |
| 559 | |
| 560 | if (!(int_status & CDNS_MCP_INT_IRQ)) |
| 561 | return IRQ_NONE; |
| 562 | |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 563 | if (int_status & CDNS_MCP_INT_RX_WL) { |
| 564 | cdns_read_response(cdns); |
| 565 | |
| 566 | if (cdns->defer) { |
| 567 | cdns_fill_msg_resp(cdns, cdns->defer->msg, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 568 | cdns->defer->length, 0); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 569 | complete(&cdns->defer->complete); |
| 570 | cdns->defer = NULL; |
Pierre-Louis Bossart | f6e2096 | 2019-05-01 10:57:42 -0500 | [diff] [blame] | 571 | } else { |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 572 | complete(&cdns->tx_complete); |
Pierre-Louis Bossart | f6e2096 | 2019-05-01 10:57:42 -0500 | [diff] [blame] | 573 | } |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 574 | } |
| 575 | |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 576 | if (int_status & CDNS_MCP_INT_CTRL_CLASH) { |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 577 | /* Slave is driving bit slot during control word */ |
| 578 | dev_err_ratelimited(cdns->dev, "Bus clash for control word\n"); |
| 579 | int_status |= CDNS_MCP_INT_CTRL_CLASH; |
| 580 | } |
| 581 | |
| 582 | if (int_status & CDNS_MCP_INT_DATA_CLASH) { |
| 583 | /* |
| 584 | * Multiple slaves trying to drive bit slot, or issue with |
| 585 | * ownership of data bits or Slave gone bonkers |
| 586 | */ |
| 587 | dev_err_ratelimited(cdns->dev, "Bus clash for data word\n"); |
| 588 | int_status |= CDNS_MCP_INT_DATA_CLASH; |
| 589 | } |
| 590 | |
| 591 | if (int_status & CDNS_MCP_INT_SLAVE_MASK) { |
| 592 | /* Mask the Slave interrupt and wake thread */ |
| 593 | cdns_updatel(cdns, CDNS_MCP_INTMASK, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 594 | CDNS_MCP_INT_SLAVE_MASK, 0); |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 595 | |
| 596 | int_status &= ~CDNS_MCP_INT_SLAVE_MASK; |
| 597 | ret = IRQ_WAKE_THREAD; |
| 598 | } |
| 599 | |
| 600 | cdns_writel(cdns, CDNS_MCP_INTSTAT, int_status); |
| 601 | return ret; |
| 602 | } |
| 603 | EXPORT_SYMBOL(sdw_cdns_irq); |
| 604 | |
| 605 | /** |
| 606 | * sdw_cdns_thread() - Cadence irq thread handler |
| 607 | * @irq: irq number |
| 608 | * @dev_id: irq context |
| 609 | */ |
| 610 | irqreturn_t sdw_cdns_thread(int irq, void *dev_id) |
| 611 | { |
| 612 | struct sdw_cdns *cdns = dev_id; |
| 613 | u32 slave0, slave1; |
| 614 | |
| 615 | dev_dbg(cdns->dev, "Slave status change\n"); |
| 616 | |
| 617 | slave0 = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT0); |
| 618 | slave1 = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT1); |
| 619 | |
| 620 | cdns_update_slave_status(cdns, slave0, slave1); |
| 621 | cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave0); |
| 622 | cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave1); |
| 623 | |
| 624 | /* clear and unmask Slave interrupt now */ |
| 625 | cdns_writel(cdns, CDNS_MCP_INTSTAT, CDNS_MCP_INT_SLAVE_MASK); |
| 626 | cdns_updatel(cdns, CDNS_MCP_INTMASK, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 627 | CDNS_MCP_INT_SLAVE_MASK, CDNS_MCP_INT_SLAVE_MASK); |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 628 | |
| 629 | return IRQ_HANDLED; |
| 630 | } |
| 631 | EXPORT_SYMBOL(sdw_cdns_thread); |
| 632 | |
| 633 | /* |
| 634 | * init routines |
| 635 | */ |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 636 | static int _cdns_enable_interrupt(struct sdw_cdns *cdns) |
| 637 | { |
| 638 | u32 mask; |
| 639 | |
| 640 | cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK0, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 641 | CDNS_MCP_SLAVE_INTMASK0_MASK); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 642 | cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK1, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 643 | CDNS_MCP_SLAVE_INTMASK1_MASK); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 644 | |
| 645 | mask = CDNS_MCP_INT_SLAVE_RSVD | CDNS_MCP_INT_SLAVE_ALERT | |
| 646 | CDNS_MCP_INT_SLAVE_ATTACH | CDNS_MCP_INT_SLAVE_NATTACH | |
| 647 | CDNS_MCP_INT_CTRL_CLASH | CDNS_MCP_INT_DATA_CLASH | |
| 648 | CDNS_MCP_INT_RX_WL | CDNS_MCP_INT_IRQ | CDNS_MCP_INT_DPINT; |
| 649 | |
| 650 | cdns_writel(cdns, CDNS_MCP_INTMASK, mask); |
| 651 | |
| 652 | return 0; |
| 653 | } |
| 654 | |
| 655 | /** |
| 656 | * sdw_cdns_enable_interrupt() - Enable SDW interrupts and update config |
| 657 | * @cdns: Cadence instance |
| 658 | */ |
| 659 | int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns) |
| 660 | { |
| 661 | int ret; |
| 662 | |
| 663 | _cdns_enable_interrupt(cdns); |
| 664 | ret = cdns_clear_bit(cdns, CDNS_MCP_CONFIG_UPDATE, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 665 | CDNS_MCP_CONFIG_UPDATE_BIT); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 666 | if (ret < 0) |
Pierre-Louis Bossart | 17ed5be | 2019-05-01 10:57:45 -0500 | [diff] [blame] | 667 | dev_err(cdns->dev, "Config update timedout\n"); |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 668 | |
| 669 | return ret; |
| 670 | } |
| 671 | EXPORT_SYMBOL(sdw_cdns_enable_interrupt); |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 672 | |
Vinod Koul | 07abeff | 2018-04-26 18:38:48 +0530 | [diff] [blame] | 673 | static int cdns_allocate_pdi(struct sdw_cdns *cdns, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 674 | struct sdw_cdns_pdi **stream, |
| 675 | u32 num, u32 pdi_offset) |
Vinod Koul | 07abeff | 2018-04-26 18:38:48 +0530 | [diff] [blame] | 676 | { |
| 677 | struct sdw_cdns_pdi *pdi; |
| 678 | int i; |
| 679 | |
| 680 | if (!num) |
| 681 | return 0; |
| 682 | |
| 683 | pdi = devm_kcalloc(cdns->dev, num, sizeof(*pdi), GFP_KERNEL); |
| 684 | if (!pdi) |
| 685 | return -ENOMEM; |
| 686 | |
| 687 | for (i = 0; i < num; i++) { |
| 688 | pdi[i].num = i + pdi_offset; |
| 689 | pdi[i].assigned = false; |
| 690 | } |
| 691 | |
| 692 | *stream = pdi; |
| 693 | return 0; |
| 694 | } |
| 695 | |
| 696 | /** |
| 697 | * sdw_cdns_pdi_init() - PDI initialization routine |
| 698 | * |
| 699 | * @cdns: Cadence instance |
| 700 | * @config: Stream configurations |
| 701 | */ |
| 702 | int sdw_cdns_pdi_init(struct sdw_cdns *cdns, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 703 | struct sdw_cdns_stream_config config) |
Vinod Koul | 07abeff | 2018-04-26 18:38:48 +0530 | [diff] [blame] | 704 | { |
| 705 | struct sdw_cdns_streams *stream; |
| 706 | int offset, i, ret; |
| 707 | |
| 708 | cdns->pcm.num_bd = config.pcm_bd; |
| 709 | cdns->pcm.num_in = config.pcm_in; |
| 710 | cdns->pcm.num_out = config.pcm_out; |
| 711 | cdns->pdm.num_bd = config.pdm_bd; |
| 712 | cdns->pdm.num_in = config.pdm_in; |
| 713 | cdns->pdm.num_out = config.pdm_out; |
| 714 | |
| 715 | /* Allocate PDIs for PCMs */ |
| 716 | stream = &cdns->pcm; |
| 717 | |
| 718 | /* First two PDIs are reserved for bulk transfers */ |
| 719 | stream->num_bd -= CDNS_PCM_PDI_OFFSET; |
| 720 | offset = CDNS_PCM_PDI_OFFSET; |
| 721 | |
| 722 | ret = cdns_allocate_pdi(cdns, &stream->bd, |
| 723 | stream->num_bd, offset); |
| 724 | if (ret) |
| 725 | return ret; |
| 726 | |
| 727 | offset += stream->num_bd; |
| 728 | |
| 729 | ret = cdns_allocate_pdi(cdns, &stream->in, |
| 730 | stream->num_in, offset); |
| 731 | if (ret) |
| 732 | return ret; |
| 733 | |
| 734 | offset += stream->num_in; |
| 735 | |
| 736 | ret = cdns_allocate_pdi(cdns, &stream->out, |
| 737 | stream->num_out, offset); |
| 738 | if (ret) |
| 739 | return ret; |
| 740 | |
| 741 | /* Update total number of PCM PDIs */ |
| 742 | stream->num_pdi = stream->num_bd + stream->num_in + stream->num_out; |
| 743 | cdns->num_ports = stream->num_pdi; |
| 744 | |
| 745 | /* Allocate PDIs for PDMs */ |
| 746 | stream = &cdns->pdm; |
| 747 | offset = CDNS_PDM_PDI_OFFSET; |
| 748 | ret = cdns_allocate_pdi(cdns, &stream->bd, |
| 749 | stream->num_bd, offset); |
| 750 | if (ret) |
| 751 | return ret; |
| 752 | |
| 753 | offset += stream->num_bd; |
| 754 | |
| 755 | ret = cdns_allocate_pdi(cdns, &stream->in, |
| 756 | stream->num_in, offset); |
| 757 | if (ret) |
| 758 | return ret; |
| 759 | |
| 760 | offset += stream->num_in; |
| 761 | |
| 762 | ret = cdns_allocate_pdi(cdns, &stream->out, |
| 763 | stream->num_out, offset); |
| 764 | if (ret) |
| 765 | return ret; |
| 766 | |
| 767 | /* Update total number of PDM PDIs */ |
| 768 | stream->num_pdi = stream->num_bd + stream->num_in + stream->num_out; |
| 769 | cdns->num_ports += stream->num_pdi; |
| 770 | |
| 771 | cdns->ports = devm_kcalloc(cdns->dev, cdns->num_ports, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 772 | sizeof(*cdns->ports), GFP_KERNEL); |
Vinod Koul | 07abeff | 2018-04-26 18:38:48 +0530 | [diff] [blame] | 773 | if (!cdns->ports) { |
| 774 | ret = -ENOMEM; |
| 775 | return ret; |
| 776 | } |
| 777 | |
| 778 | for (i = 0; i < cdns->num_ports; i++) { |
| 779 | cdns->ports[i].assigned = false; |
| 780 | cdns->ports[i].num = i + 1; /* Port 0 reserved for bulk */ |
| 781 | } |
| 782 | |
| 783 | return 0; |
| 784 | } |
| 785 | EXPORT_SYMBOL(sdw_cdns_pdi_init); |
| 786 | |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 787 | /** |
| 788 | * sdw_cdns_init() - Cadence initialization |
| 789 | * @cdns: Cadence instance |
| 790 | */ |
| 791 | int sdw_cdns_init(struct sdw_cdns *cdns) |
| 792 | { |
| 793 | u32 val; |
| 794 | int ret; |
| 795 | |
| 796 | /* Exit clock stop */ |
| 797 | ret = cdns_clear_bit(cdns, CDNS_MCP_CONTROL, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 798 | CDNS_MCP_CONTROL_CLK_STOP_CLR); |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 799 | if (ret < 0) { |
| 800 | dev_err(cdns->dev, "Couldn't exit from clock stop\n"); |
| 801 | return ret; |
| 802 | } |
| 803 | |
| 804 | /* Set clock divider */ |
| 805 | val = cdns_readl(cdns, CDNS_MCP_CLK_CTRL0); |
| 806 | val |= CDNS_DEFAULT_CLK_DIVIDER; |
| 807 | cdns_writel(cdns, CDNS_MCP_CLK_CTRL0, val); |
| 808 | |
| 809 | /* Set the default frame shape */ |
| 810 | cdns_writel(cdns, CDNS_MCP_FRAME_SHAPE_INIT, CDNS_DEFAULT_FRAME_SHAPE); |
| 811 | |
| 812 | /* Set SSP interval to default value */ |
| 813 | cdns_writel(cdns, CDNS_MCP_SSP_CTRL0, CDNS_DEFAULT_SSP_INTERVAL); |
| 814 | cdns_writel(cdns, CDNS_MCP_SSP_CTRL1, CDNS_DEFAULT_SSP_INTERVAL); |
| 815 | |
| 816 | /* Set cmd accept mode */ |
| 817 | cdns_updatel(cdns, CDNS_MCP_CONTROL, CDNS_MCP_CONTROL_CMD_ACCEPT, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 818 | CDNS_MCP_CONTROL_CMD_ACCEPT); |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 819 | |
| 820 | /* Configure mcp config */ |
| 821 | val = cdns_readl(cdns, CDNS_MCP_CONFIG); |
| 822 | |
| 823 | /* Set Max cmd retry to 15 */ |
| 824 | val |= CDNS_MCP_CONFIG_MCMD_RETRY; |
| 825 | |
| 826 | /* Set frame delay between PREQ and ping frame to 15 frames */ |
| 827 | val |= 0xF << SDW_REG_SHIFT(CDNS_MCP_CONFIG_MPREQ_DELAY); |
| 828 | |
| 829 | /* Disable auto bus release */ |
| 830 | val &= ~CDNS_MCP_CONFIG_BUS_REL; |
| 831 | |
| 832 | /* Disable sniffer mode */ |
| 833 | val &= ~CDNS_MCP_CONFIG_SNIFFER; |
| 834 | |
| 835 | /* Set cmd mode for Tx and Rx cmds */ |
| 836 | val &= ~CDNS_MCP_CONFIG_CMD; |
| 837 | |
| 838 | /* Set operation to normal */ |
| 839 | val &= ~CDNS_MCP_CONFIG_OP; |
| 840 | val |= CDNS_MCP_CONFIG_OP_NORMAL; |
| 841 | |
| 842 | cdns_writel(cdns, CDNS_MCP_CONFIG, val); |
| 843 | |
| 844 | return 0; |
| 845 | } |
| 846 | EXPORT_SYMBOL(sdw_cdns_init); |
| 847 | |
Vinod Koul | 07abeff | 2018-04-26 18:38:48 +0530 | [diff] [blame] | 848 | int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params) |
| 849 | { |
| 850 | struct sdw_cdns *cdns = bus_to_cdns(bus); |
| 851 | int mcp_clkctrl_off, mcp_clkctrl; |
| 852 | int divider; |
| 853 | |
| 854 | if (!params->curr_dr_freq) { |
Pierre-Louis Bossart | 17ed5be | 2019-05-01 10:57:45 -0500 | [diff] [blame] | 855 | dev_err(cdns->dev, "NULL curr_dr_freq\n"); |
Vinod Koul | 07abeff | 2018-04-26 18:38:48 +0530 | [diff] [blame] | 856 | return -EINVAL; |
| 857 | } |
| 858 | |
| 859 | divider = (params->max_dr_freq / params->curr_dr_freq) - 1; |
| 860 | |
| 861 | if (params->next_bank) |
| 862 | mcp_clkctrl_off = CDNS_MCP_CLK_CTRL1; |
| 863 | else |
| 864 | mcp_clkctrl_off = CDNS_MCP_CLK_CTRL0; |
| 865 | |
| 866 | mcp_clkctrl = cdns_readl(cdns, mcp_clkctrl_off); |
| 867 | mcp_clkctrl |= divider; |
| 868 | cdns_writel(cdns, mcp_clkctrl_off, mcp_clkctrl); |
| 869 | |
| 870 | return 0; |
| 871 | } |
| 872 | EXPORT_SYMBOL(cdns_bus_conf); |
| 873 | |
| 874 | static int cdns_port_params(struct sdw_bus *bus, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 875 | struct sdw_port_params *p_params, unsigned int bank) |
Vinod Koul | 07abeff | 2018-04-26 18:38:48 +0530 | [diff] [blame] | 876 | { |
| 877 | struct sdw_cdns *cdns = bus_to_cdns(bus); |
| 878 | int dpn_config = 0, dpn_config_off; |
| 879 | |
| 880 | if (bank) |
| 881 | dpn_config_off = CDNS_DPN_B1_CONFIG(p_params->num); |
| 882 | else |
| 883 | dpn_config_off = CDNS_DPN_B0_CONFIG(p_params->num); |
| 884 | |
| 885 | dpn_config = cdns_readl(cdns, dpn_config_off); |
| 886 | |
| 887 | dpn_config |= ((p_params->bps - 1) << |
| 888 | SDW_REG_SHIFT(CDNS_DPN_CONFIG_WL)); |
| 889 | dpn_config |= (p_params->flow_mode << |
| 890 | SDW_REG_SHIFT(CDNS_DPN_CONFIG_PORT_FLOW)); |
| 891 | dpn_config |= (p_params->data_mode << |
| 892 | SDW_REG_SHIFT(CDNS_DPN_CONFIG_PORT_DAT)); |
| 893 | |
| 894 | cdns_writel(cdns, dpn_config_off, dpn_config); |
| 895 | |
| 896 | return 0; |
| 897 | } |
| 898 | |
| 899 | static int cdns_transport_params(struct sdw_bus *bus, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 900 | struct sdw_transport_params *t_params, |
| 901 | enum sdw_reg_bank bank) |
Vinod Koul | 07abeff | 2018-04-26 18:38:48 +0530 | [diff] [blame] | 902 | { |
| 903 | struct sdw_cdns *cdns = bus_to_cdns(bus); |
| 904 | int dpn_offsetctrl = 0, dpn_offsetctrl_off; |
| 905 | int dpn_config = 0, dpn_config_off; |
| 906 | int dpn_hctrl = 0, dpn_hctrl_off; |
| 907 | int num = t_params->port_num; |
| 908 | int dpn_samplectrl_off; |
| 909 | |
| 910 | /* |
| 911 | * Note: Only full data port is supported on the Master side for |
| 912 | * both PCM and PDM ports. |
| 913 | */ |
| 914 | |
| 915 | if (bank) { |
| 916 | dpn_config_off = CDNS_DPN_B1_CONFIG(num); |
| 917 | dpn_samplectrl_off = CDNS_DPN_B1_SAMPLE_CTRL(num); |
| 918 | dpn_hctrl_off = CDNS_DPN_B1_HCTRL(num); |
| 919 | dpn_offsetctrl_off = CDNS_DPN_B1_OFFSET_CTRL(num); |
| 920 | } else { |
| 921 | dpn_config_off = CDNS_DPN_B0_CONFIG(num); |
| 922 | dpn_samplectrl_off = CDNS_DPN_B0_SAMPLE_CTRL(num); |
| 923 | dpn_hctrl_off = CDNS_DPN_B0_HCTRL(num); |
| 924 | dpn_offsetctrl_off = CDNS_DPN_B0_OFFSET_CTRL(num); |
| 925 | } |
| 926 | |
| 927 | dpn_config = cdns_readl(cdns, dpn_config_off); |
| 928 | |
| 929 | dpn_config |= (t_params->blk_grp_ctrl << |
| 930 | SDW_REG_SHIFT(CDNS_DPN_CONFIG_BGC)); |
| 931 | dpn_config |= (t_params->blk_pkg_mode << |
| 932 | SDW_REG_SHIFT(CDNS_DPN_CONFIG_BPM)); |
| 933 | cdns_writel(cdns, dpn_config_off, dpn_config); |
| 934 | |
| 935 | dpn_offsetctrl |= (t_params->offset1 << |
| 936 | SDW_REG_SHIFT(CDNS_DPN_OFFSET_CTRL_1)); |
| 937 | dpn_offsetctrl |= (t_params->offset2 << |
| 938 | SDW_REG_SHIFT(CDNS_DPN_OFFSET_CTRL_2)); |
| 939 | cdns_writel(cdns, dpn_offsetctrl_off, dpn_offsetctrl); |
| 940 | |
| 941 | dpn_hctrl |= (t_params->hstart << |
| 942 | SDW_REG_SHIFT(CDNS_DPN_HCTRL_HSTART)); |
| 943 | dpn_hctrl |= (t_params->hstop << SDW_REG_SHIFT(CDNS_DPN_HCTRL_HSTOP)); |
| 944 | dpn_hctrl |= (t_params->lane_ctrl << |
| 945 | SDW_REG_SHIFT(CDNS_DPN_HCTRL_LCTRL)); |
| 946 | |
| 947 | cdns_writel(cdns, dpn_hctrl_off, dpn_hctrl); |
| 948 | cdns_writel(cdns, dpn_samplectrl_off, (t_params->sample_interval - 1)); |
| 949 | |
| 950 | return 0; |
| 951 | } |
| 952 | |
| 953 | static int cdns_port_enable(struct sdw_bus *bus, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 954 | struct sdw_enable_ch *enable_ch, unsigned int bank) |
Vinod Koul | 07abeff | 2018-04-26 18:38:48 +0530 | [diff] [blame] | 955 | { |
| 956 | struct sdw_cdns *cdns = bus_to_cdns(bus); |
| 957 | int dpn_chnen_off, ch_mask; |
| 958 | |
| 959 | if (bank) |
| 960 | dpn_chnen_off = CDNS_DPN_B1_CH_EN(enable_ch->port_num); |
| 961 | else |
| 962 | dpn_chnen_off = CDNS_DPN_B0_CH_EN(enable_ch->port_num); |
| 963 | |
| 964 | ch_mask = enable_ch->ch_mask * enable_ch->enable; |
| 965 | cdns_writel(cdns, dpn_chnen_off, ch_mask); |
| 966 | |
| 967 | return 0; |
| 968 | } |
| 969 | |
| 970 | static const struct sdw_master_port_ops cdns_port_ops = { |
| 971 | .dpn_set_port_params = cdns_port_params, |
| 972 | .dpn_set_port_transport_params = cdns_transport_params, |
| 973 | .dpn_port_enable_ch = cdns_port_enable, |
| 974 | }; |
| 975 | |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 976 | /** |
| 977 | * sdw_cdns_probe() - Cadence probe routine |
| 978 | * @cdns: Cadence instance |
| 979 | */ |
| 980 | int sdw_cdns_probe(struct sdw_cdns *cdns) |
| 981 | { |
| 982 | init_completion(&cdns->tx_complete); |
Vinod Koul | 07abeff | 2018-04-26 18:38:48 +0530 | [diff] [blame] | 983 | cdns->bus.port_ops = &cdns_port_ops; |
Sanyog Kale | 956baa1 | 2017-12-14 11:19:42 +0530 | [diff] [blame] | 984 | |
| 985 | return 0; |
| 986 | } |
| 987 | EXPORT_SYMBOL(sdw_cdns_probe); |
| 988 | |
Vinod Koul | 5d6b3c8 | 2018-04-26 18:38:53 +0530 | [diff] [blame] | 989 | int cdns_set_sdw_stream(struct snd_soc_dai *dai, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 990 | void *stream, bool pcm, int direction) |
Vinod Koul | 5d6b3c8 | 2018-04-26 18:38:53 +0530 | [diff] [blame] | 991 | { |
| 992 | struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai); |
| 993 | struct sdw_cdns_dma_data *dma; |
| 994 | |
| 995 | dma = kzalloc(sizeof(*dma), GFP_KERNEL); |
| 996 | if (!dma) |
| 997 | return -ENOMEM; |
| 998 | |
| 999 | if (pcm) |
| 1000 | dma->stream_type = SDW_STREAM_PCM; |
| 1001 | else |
| 1002 | dma->stream_type = SDW_STREAM_PDM; |
| 1003 | |
| 1004 | dma->bus = &cdns->bus; |
| 1005 | dma->link_id = cdns->instance; |
| 1006 | |
| 1007 | dma->stream = stream; |
| 1008 | |
| 1009 | if (direction == SNDRV_PCM_STREAM_PLAYBACK) |
| 1010 | dai->playback_dma_data = dma; |
| 1011 | else |
| 1012 | dai->capture_dma_data = dma; |
| 1013 | |
| 1014 | return 0; |
| 1015 | } |
| 1016 | EXPORT_SYMBOL(cdns_set_sdw_stream); |
| 1017 | |
| 1018 | /** |
| 1019 | * cdns_find_pdi() - Find a free PDI |
| 1020 | * |
| 1021 | * @cdns: Cadence instance |
| 1022 | * @num: Number of PDIs |
| 1023 | * @pdi: PDI instances |
| 1024 | * |
| 1025 | * Find and return a free PDI for a given PDI array |
| 1026 | */ |
| 1027 | static struct sdw_cdns_pdi *cdns_find_pdi(struct sdw_cdns *cdns, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 1028 | unsigned int num, |
| 1029 | struct sdw_cdns_pdi *pdi) |
Vinod Koul | 5d6b3c8 | 2018-04-26 18:38:53 +0530 | [diff] [blame] | 1030 | { |
| 1031 | int i; |
| 1032 | |
| 1033 | for (i = 0; i < num; i++) { |
Pierre-Louis Bossart | 4c56860 | 2019-05-01 10:57:43 -0500 | [diff] [blame] | 1034 | if (pdi[i].assigned) |
Vinod Koul | 5d6b3c8 | 2018-04-26 18:38:53 +0530 | [diff] [blame] | 1035 | continue; |
| 1036 | pdi[i].assigned = true; |
| 1037 | return &pdi[i]; |
| 1038 | } |
| 1039 | |
| 1040 | return NULL; |
| 1041 | } |
| 1042 | |
| 1043 | /** |
| 1044 | * sdw_cdns_config_stream: Configure a stream |
| 1045 | * |
| 1046 | * @cdns: Cadence instance |
| 1047 | * @port: Cadence data port |
| 1048 | * @ch: Channel count |
| 1049 | * @dir: Data direction |
| 1050 | * @pdi: PDI to be used |
| 1051 | */ |
| 1052 | void sdw_cdns_config_stream(struct sdw_cdns *cdns, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 1053 | struct sdw_cdns_port *port, |
| 1054 | u32 ch, u32 dir, struct sdw_cdns_pdi *pdi) |
Vinod Koul | 5d6b3c8 | 2018-04-26 18:38:53 +0530 | [diff] [blame] | 1055 | { |
| 1056 | u32 offset, val = 0; |
| 1057 | |
| 1058 | if (dir == SDW_DATA_DIR_RX) |
| 1059 | val = CDNS_PORTCTRL_DIRN; |
| 1060 | |
| 1061 | offset = CDNS_PORTCTRL + port->num * CDNS_PORT_OFFSET; |
| 1062 | cdns_updatel(cdns, offset, CDNS_PORTCTRL_DIRN, val); |
| 1063 | |
| 1064 | val = port->num; |
| 1065 | val |= ((1 << ch) - 1) << SDW_REG_SHIFT(CDNS_PDI_CONFIG_CHANNEL); |
| 1066 | cdns_writel(cdns, CDNS_PDI_CONFIG(pdi->num), val); |
| 1067 | } |
| 1068 | EXPORT_SYMBOL(sdw_cdns_config_stream); |
| 1069 | |
| 1070 | /** |
| 1071 | * cdns_get_num_pdi() - Get number of PDIs required |
| 1072 | * |
| 1073 | * @cdns: Cadence instance |
| 1074 | * @pdi: PDI to be used |
| 1075 | * @num: Number of PDIs |
| 1076 | * @ch_count: Channel count |
| 1077 | */ |
| 1078 | static int cdns_get_num_pdi(struct sdw_cdns *cdns, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 1079 | struct sdw_cdns_pdi *pdi, |
| 1080 | unsigned int num, u32 ch_count) |
Vinod Koul | 5d6b3c8 | 2018-04-26 18:38:53 +0530 | [diff] [blame] | 1081 | { |
| 1082 | int i, pdis = 0; |
| 1083 | |
| 1084 | for (i = 0; i < num; i++) { |
Pierre-Louis Bossart | 4c56860 | 2019-05-01 10:57:43 -0500 | [diff] [blame] | 1085 | if (pdi[i].assigned) |
Vinod Koul | 5d6b3c8 | 2018-04-26 18:38:53 +0530 | [diff] [blame] | 1086 | continue; |
| 1087 | |
| 1088 | if (pdi[i].ch_count < ch_count) |
| 1089 | ch_count -= pdi[i].ch_count; |
| 1090 | else |
| 1091 | ch_count = 0; |
| 1092 | |
| 1093 | pdis++; |
| 1094 | |
| 1095 | if (!ch_count) |
| 1096 | break; |
| 1097 | } |
| 1098 | |
| 1099 | if (ch_count) |
| 1100 | return 0; |
| 1101 | |
| 1102 | return pdis; |
| 1103 | } |
| 1104 | |
| 1105 | /** |
| 1106 | * sdw_cdns_get_stream() - Get stream information |
| 1107 | * |
| 1108 | * @cdns: Cadence instance |
| 1109 | * @stream: Stream to be allocated |
| 1110 | * @ch: Channel count |
| 1111 | * @dir: Data direction |
| 1112 | */ |
| 1113 | int sdw_cdns_get_stream(struct sdw_cdns *cdns, |
| 1114 | struct sdw_cdns_streams *stream, |
| 1115 | u32 ch, u32 dir) |
| 1116 | { |
| 1117 | int pdis = 0; |
| 1118 | |
| 1119 | if (dir == SDW_DATA_DIR_RX) |
| 1120 | pdis = cdns_get_num_pdi(cdns, stream->in, stream->num_in, ch); |
| 1121 | else |
| 1122 | pdis = cdns_get_num_pdi(cdns, stream->out, stream->num_out, ch); |
| 1123 | |
| 1124 | /* check if we found PDI, else find in bi-directional */ |
| 1125 | if (!pdis) |
| 1126 | pdis = cdns_get_num_pdi(cdns, stream->bd, stream->num_bd, ch); |
| 1127 | |
| 1128 | return pdis; |
| 1129 | } |
| 1130 | EXPORT_SYMBOL(sdw_cdns_get_stream); |
| 1131 | |
| 1132 | /** |
| 1133 | * sdw_cdns_alloc_stream() - Allocate a stream |
| 1134 | * |
| 1135 | * @cdns: Cadence instance |
| 1136 | * @stream: Stream to be allocated |
| 1137 | * @port: Cadence data port |
| 1138 | * @ch: Channel count |
| 1139 | * @dir: Data direction |
| 1140 | */ |
| 1141 | int sdw_cdns_alloc_stream(struct sdw_cdns *cdns, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 1142 | struct sdw_cdns_streams *stream, |
| 1143 | struct sdw_cdns_port *port, u32 ch, u32 dir) |
Vinod Koul | 5d6b3c8 | 2018-04-26 18:38:53 +0530 | [diff] [blame] | 1144 | { |
| 1145 | struct sdw_cdns_pdi *pdi = NULL; |
| 1146 | |
| 1147 | if (dir == SDW_DATA_DIR_RX) |
| 1148 | pdi = cdns_find_pdi(cdns, stream->num_in, stream->in); |
| 1149 | else |
| 1150 | pdi = cdns_find_pdi(cdns, stream->num_out, stream->out); |
| 1151 | |
| 1152 | /* check if we found a PDI, else find in bi-directional */ |
| 1153 | if (!pdi) |
| 1154 | pdi = cdns_find_pdi(cdns, stream->num_bd, stream->bd); |
| 1155 | |
| 1156 | if (!pdi) |
| 1157 | return -EIO; |
| 1158 | |
| 1159 | port->pdi = pdi; |
| 1160 | pdi->l_ch_num = 0; |
| 1161 | pdi->h_ch_num = ch - 1; |
| 1162 | pdi->dir = dir; |
| 1163 | pdi->ch_count = ch; |
| 1164 | |
| 1165 | return 0; |
| 1166 | } |
| 1167 | EXPORT_SYMBOL(sdw_cdns_alloc_stream); |
| 1168 | |
| 1169 | void sdw_cdns_shutdown(struct snd_pcm_substream *substream, |
Pierre-Louis Bossart | bbb6381 | 2019-05-01 10:57:41 -0500 | [diff] [blame] | 1170 | struct snd_soc_dai *dai) |
Vinod Koul | 5d6b3c8 | 2018-04-26 18:38:53 +0530 | [diff] [blame] | 1171 | { |
| 1172 | struct sdw_cdns_dma_data *dma; |
| 1173 | |
| 1174 | dma = snd_soc_dai_get_dma_data(dai, substream); |
| 1175 | if (!dma) |
| 1176 | return; |
| 1177 | |
| 1178 | snd_soc_dai_set_dma_data(dai, substream, NULL); |
| 1179 | kfree(dma); |
| 1180 | } |
| 1181 | EXPORT_SYMBOL(sdw_cdns_shutdown); |
| 1182 | |
Vinod Koul | 2f52a51 | 2017-12-14 11:19:41 +0530 | [diff] [blame] | 1183 | MODULE_LICENSE("Dual BSD/GPL"); |
| 1184 | MODULE_DESCRIPTION("Cadence Soundwire Library"); |