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/debugfs.h> 12 #include <linux/interrupt.h> 13 #include <linux/io.h> 14 #include <linux/module.h> 15 #include <linux/mod_devicetable.h> 16 #include <linux/soundwire/sdw_registers.h> 17 #include <linux/soundwire/sdw.h> 18 #include <sound/pcm_params.h> 19 #include <sound/soc.h> 20 #include "bus.h" 21 #include "cadence_master.h" 22 23 static int interrupt_mask; 24 module_param_named(cnds_mcp_int_mask, interrupt_mask, int, 0444); 25 MODULE_PARM_DESC(cdns_mcp_int_mask, "Cadence MCP IntMask"); 26 27 #define CDNS_MCP_CONFIG 0x0 28 29 #define CDNS_MCP_CONFIG_MCMD_RETRY GENMASK(27, 24) 30 #define CDNS_MCP_CONFIG_MPREQ_DELAY GENMASK(20, 16) 31 #define CDNS_MCP_CONFIG_MMASTER BIT(7) 32 #define CDNS_MCP_CONFIG_BUS_REL BIT(6) 33 #define CDNS_MCP_CONFIG_SNIFFER BIT(5) 34 #define CDNS_MCP_CONFIG_SSPMOD BIT(4) 35 #define CDNS_MCP_CONFIG_CMD BIT(3) 36 #define CDNS_MCP_CONFIG_OP GENMASK(2, 0) 37 #define CDNS_MCP_CONFIG_OP_NORMAL 0 38 39 #define CDNS_MCP_CONTROL 0x4 40 41 #define CDNS_MCP_CONTROL_RST_DELAY GENMASK(10, 8) 42 #define CDNS_MCP_CONTROL_CMD_RST BIT(7) 43 #define CDNS_MCP_CONTROL_SOFT_RST BIT(6) 44 #define CDNS_MCP_CONTROL_SW_RST BIT(5) 45 #define CDNS_MCP_CONTROL_HW_RST BIT(4) 46 #define CDNS_MCP_CONTROL_CLK_PAUSE BIT(3) 47 #define CDNS_MCP_CONTROL_CLK_STOP_CLR BIT(2) 48 #define CDNS_MCP_CONTROL_CMD_ACCEPT BIT(1) 49 #define CDNS_MCP_CONTROL_BLOCK_WAKEUP BIT(0) 50 51 #define CDNS_MCP_CMDCTRL 0x8 52 #define CDNS_MCP_SSPSTAT 0xC 53 #define CDNS_MCP_FRAME_SHAPE 0x10 54 #define CDNS_MCP_FRAME_SHAPE_INIT 0x14 55 #define CDNS_MCP_FRAME_SHAPE_COL_MASK GENMASK(2, 0) 56 #define CDNS_MCP_FRAME_SHAPE_ROW_OFFSET 3 57 58 #define CDNS_MCP_CONFIG_UPDATE 0x18 59 #define CDNS_MCP_CONFIG_UPDATE_BIT BIT(0) 60 61 #define CDNS_MCP_PHYCTRL 0x1C 62 #define CDNS_MCP_SSP_CTRL0 0x20 63 #define CDNS_MCP_SSP_CTRL1 0x28 64 #define CDNS_MCP_CLK_CTRL0 0x30 65 #define CDNS_MCP_CLK_CTRL1 0x38 66 #define CDNS_MCP_CLK_MCLKD_MASK GENMASK(7, 0) 67 68 #define CDNS_MCP_STAT 0x40 69 70 #define CDNS_MCP_STAT_ACTIVE_BANK BIT(20) 71 #define CDNS_MCP_STAT_CLK_STOP BIT(16) 72 73 #define CDNS_MCP_INTSTAT 0x44 74 #define CDNS_MCP_INTMASK 0x48 75 76 #define CDNS_MCP_INT_IRQ BIT(31) 77 #define CDNS_MCP_INT_RESERVED1 GENMASK(30, 17) 78 #define CDNS_MCP_INT_WAKEUP BIT(16) 79 #define CDNS_MCP_INT_SLAVE_RSVD BIT(15) 80 #define CDNS_MCP_INT_SLAVE_ALERT BIT(14) 81 #define CDNS_MCP_INT_SLAVE_ATTACH BIT(13) 82 #define CDNS_MCP_INT_SLAVE_NATTACH BIT(12) 83 #define CDNS_MCP_INT_SLAVE_MASK GENMASK(15, 12) 84 #define CDNS_MCP_INT_DPINT BIT(11) 85 #define CDNS_MCP_INT_CTRL_CLASH BIT(10) 86 #define CDNS_MCP_INT_DATA_CLASH BIT(9) 87 #define CDNS_MCP_INT_PARITY BIT(8) 88 #define CDNS_MCP_INT_CMD_ERR BIT(7) 89 #define CDNS_MCP_INT_RESERVED2 GENMASK(6, 4) 90 #define CDNS_MCP_INT_RX_NE BIT(3) 91 #define CDNS_MCP_INT_RX_WL BIT(2) 92 #define CDNS_MCP_INT_TXE BIT(1) 93 #define CDNS_MCP_INT_TXF BIT(0) 94 #define CDNS_MCP_INT_RESERVED (CDNS_MCP_INT_RESERVED1 | CDNS_MCP_INT_RESERVED2) 95 96 #define CDNS_MCP_INTSET 0x4C 97 98 #define CDNS_MCP_SLAVE_STAT 0x50 99 #define CDNS_MCP_SLAVE_STAT_MASK GENMASK(1, 0) 100 101 #define CDNS_MCP_SLAVE_INTSTAT0 0x54 102 #define CDNS_MCP_SLAVE_INTSTAT1 0x58 103 #define CDNS_MCP_SLAVE_INTSTAT_NPRESENT BIT(0) 104 #define CDNS_MCP_SLAVE_INTSTAT_ATTACHED BIT(1) 105 #define CDNS_MCP_SLAVE_INTSTAT_ALERT BIT(2) 106 #define CDNS_MCP_SLAVE_INTSTAT_RESERVED BIT(3) 107 #define CDNS_MCP_SLAVE_STATUS_BITS GENMASK(3, 0) 108 #define CDNS_MCP_SLAVE_STATUS_NUM 4 109 110 #define CDNS_MCP_SLAVE_INTMASK0 0x5C 111 #define CDNS_MCP_SLAVE_INTMASK1 0x60 112 113 #define CDNS_MCP_SLAVE_INTMASK0_MASK GENMASK(31, 0) 114 #define CDNS_MCP_SLAVE_INTMASK1_MASK GENMASK(15, 0) 115 116 #define CDNS_MCP_PORT_INTSTAT 0x64 117 #define CDNS_MCP_PDI_STAT 0x6C 118 119 #define CDNS_MCP_FIFOLEVEL 0x78 120 #define CDNS_MCP_FIFOSTAT 0x7C 121 #define CDNS_MCP_RX_FIFO_AVAIL GENMASK(5, 0) 122 123 #define CDNS_MCP_CMD_BASE 0x80 124 #define CDNS_MCP_RESP_BASE 0x80 125 #define CDNS_MCP_CMD_LEN 0x20 126 #define CDNS_MCP_CMD_WORD_LEN 0x4 127 128 #define CDNS_MCP_CMD_SSP_TAG BIT(31) 129 #define CDNS_MCP_CMD_COMMAND GENMASK(30, 28) 130 #define CDNS_MCP_CMD_DEV_ADDR GENMASK(27, 24) 131 #define CDNS_MCP_CMD_REG_ADDR_H GENMASK(23, 16) 132 #define CDNS_MCP_CMD_REG_ADDR_L GENMASK(15, 8) 133 #define CDNS_MCP_CMD_REG_DATA GENMASK(7, 0) 134 135 #define CDNS_MCP_CMD_READ 2 136 #define CDNS_MCP_CMD_WRITE 3 137 138 #define CDNS_MCP_RESP_RDATA GENMASK(15, 8) 139 #define CDNS_MCP_RESP_ACK BIT(0) 140 #define CDNS_MCP_RESP_NACK BIT(1) 141 142 #define CDNS_DP_SIZE 128 143 144 #define CDNS_DPN_B0_CONFIG(n) (0x100 + CDNS_DP_SIZE * (n)) 145 #define CDNS_DPN_B0_CH_EN(n) (0x104 + CDNS_DP_SIZE * (n)) 146 #define CDNS_DPN_B0_SAMPLE_CTRL(n) (0x108 + CDNS_DP_SIZE * (n)) 147 #define CDNS_DPN_B0_OFFSET_CTRL(n) (0x10C + CDNS_DP_SIZE * (n)) 148 #define CDNS_DPN_B0_HCTRL(n) (0x110 + CDNS_DP_SIZE * (n)) 149 #define CDNS_DPN_B0_ASYNC_CTRL(n) (0x114 + CDNS_DP_SIZE * (n)) 150 151 #define CDNS_DPN_B1_CONFIG(n) (0x118 + CDNS_DP_SIZE * (n)) 152 #define CDNS_DPN_B1_CH_EN(n) (0x11C + CDNS_DP_SIZE * (n)) 153 #define CDNS_DPN_B1_SAMPLE_CTRL(n) (0x120 + CDNS_DP_SIZE * (n)) 154 #define CDNS_DPN_B1_OFFSET_CTRL(n) (0x124 + CDNS_DP_SIZE * (n)) 155 #define CDNS_DPN_B1_HCTRL(n) (0x128 + CDNS_DP_SIZE * (n)) 156 #define CDNS_DPN_B1_ASYNC_CTRL(n) (0x12C + CDNS_DP_SIZE * (n)) 157 158 #define CDNS_DPN_CONFIG_BPM BIT(18) 159 #define CDNS_DPN_CONFIG_BGC GENMASK(17, 16) 160 #define CDNS_DPN_CONFIG_WL GENMASK(12, 8) 161 #define CDNS_DPN_CONFIG_PORT_DAT GENMASK(3, 2) 162 #define CDNS_DPN_CONFIG_PORT_FLOW GENMASK(1, 0) 163 164 #define CDNS_DPN_SAMPLE_CTRL_SI GENMASK(15, 0) 165 166 #define CDNS_DPN_OFFSET_CTRL_1 GENMASK(7, 0) 167 #define CDNS_DPN_OFFSET_CTRL_2 GENMASK(15, 8) 168 169 #define CDNS_DPN_HCTRL_HSTOP GENMASK(3, 0) 170 #define CDNS_DPN_HCTRL_HSTART GENMASK(7, 4) 171 #define CDNS_DPN_HCTRL_LCTRL GENMASK(10, 8) 172 173 #define CDNS_PORTCTRL 0x130 174 #define CDNS_PORTCTRL_DIRN BIT(7) 175 #define CDNS_PORTCTRL_BANK_INVERT BIT(8) 176 177 #define CDNS_PORT_OFFSET 0x80 178 179 #define CDNS_PDI_CONFIG(n) (0x1100 + (n) * 16) 180 181 #define CDNS_PDI_CONFIG_SOFT_RESET BIT(24) 182 #define CDNS_PDI_CONFIG_CHANNEL GENMASK(15, 8) 183 #define CDNS_PDI_CONFIG_PORT GENMASK(4, 0) 184 185 /* Driver defaults */ 186 #define CDNS_DEFAULT_SSP_INTERVAL 0x18 187 #define CDNS_TX_TIMEOUT 2000 188 189 #define CDNS_SCP_RX_FIFOLEVEL 0x2 190 191 /* 192 * register accessor helpers 193 */ 194 static inline u32 cdns_readl(struct sdw_cdns *cdns, int offset) 195 { 196 return readl(cdns->registers + offset); 197 } 198 199 static inline void cdns_writel(struct sdw_cdns *cdns, int offset, u32 value) 200 { 201 writel(value, cdns->registers + offset); 202 } 203 204 static inline void cdns_updatel(struct sdw_cdns *cdns, 205 int offset, u32 mask, u32 val) 206 { 207 u32 tmp; 208 209 tmp = cdns_readl(cdns, offset); 210 tmp = (tmp & ~mask) | val; 211 cdns_writel(cdns, offset, tmp); 212 } 213 214 static int cdns_clear_bit(struct sdw_cdns *cdns, int offset, u32 value) 215 { 216 int timeout = 10; 217 u32 reg_read; 218 219 writel(value, cdns->registers + offset); 220 221 /* Wait for bit to be self cleared */ 222 do { 223 reg_read = readl(cdns->registers + offset); 224 if ((reg_read & value) == 0) 225 return 0; 226 227 timeout--; 228 udelay(50); 229 } while (timeout != 0); 230 231 return -EAGAIN; 232 } 233 234 /* 235 * all changes to the MCP_CONFIG, MCP_CONTROL, MCP_CMDCTRL and MCP_PHYCTRL 236 * need to be confirmed with a write to MCP_CONFIG_UPDATE 237 */ 238 static int cdns_update_config(struct sdw_cdns *cdns) 239 { 240 int ret; 241 242 ret = cdns_clear_bit(cdns, CDNS_MCP_CONFIG_UPDATE, 243 CDNS_MCP_CONFIG_UPDATE_BIT); 244 if (ret < 0) 245 dev_err(cdns->dev, "Config update timedout\n"); 246 247 return ret; 248 } 249 250 /* 251 * debugfs 252 */ 253 #ifdef CONFIG_DEBUG_FS 254 255 #define RD_BUF (2 * PAGE_SIZE) 256 257 static ssize_t cdns_sprintf(struct sdw_cdns *cdns, 258 char *buf, size_t pos, unsigned int reg) 259 { 260 return scnprintf(buf + pos, RD_BUF - pos, 261 "%4x\t%8x\n", reg, cdns_readl(cdns, reg)); 262 } 263 264 static int cdns_reg_show(struct seq_file *s, void *data) 265 { 266 struct sdw_cdns *cdns = s->private; 267 char *buf; 268 ssize_t ret; 269 int num_ports; 270 int i, j; 271 272 buf = kzalloc(RD_BUF, GFP_KERNEL); 273 if (!buf) 274 return -ENOMEM; 275 276 ret = scnprintf(buf, RD_BUF, "Register Value\n"); 277 ret += scnprintf(buf + ret, RD_BUF - ret, "\nMCP Registers\n"); 278 /* 8 MCP registers */ 279 for (i = CDNS_MCP_CONFIG; i <= CDNS_MCP_PHYCTRL; i += sizeof(u32)) 280 ret += cdns_sprintf(cdns, buf, ret, i); 281 282 ret += scnprintf(buf + ret, RD_BUF - ret, 283 "\nStatus & Intr Registers\n"); 284 /* 13 Status & Intr registers (offsets 0x70 and 0x74 not defined) */ 285 for (i = CDNS_MCP_STAT; i <= CDNS_MCP_FIFOSTAT; i += sizeof(u32)) 286 ret += cdns_sprintf(cdns, buf, ret, i); 287 288 ret += scnprintf(buf + ret, RD_BUF - ret, 289 "\nSSP & Clk ctrl Registers\n"); 290 ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_SSP_CTRL0); 291 ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_SSP_CTRL1); 292 ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_CLK_CTRL0); 293 ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_CLK_CTRL1); 294 295 ret += scnprintf(buf + ret, RD_BUF - ret, 296 "\nDPn B0 Registers\n"); 297 298 num_ports = cdns->num_ports; 299 300 for (i = 0; i < num_ports; i++) { 301 ret += scnprintf(buf + ret, RD_BUF - ret, 302 "\nDP-%d\n", i); 303 for (j = CDNS_DPN_B0_CONFIG(i); 304 j < CDNS_DPN_B0_ASYNC_CTRL(i); j += sizeof(u32)) 305 ret += cdns_sprintf(cdns, buf, ret, j); 306 } 307 308 ret += scnprintf(buf + ret, RD_BUF - ret, 309 "\nDPn B1 Registers\n"); 310 for (i = 0; i < num_ports; i++) { 311 ret += scnprintf(buf + ret, RD_BUF - ret, 312 "\nDP-%d\n", i); 313 314 for (j = CDNS_DPN_B1_CONFIG(i); 315 j < CDNS_DPN_B1_ASYNC_CTRL(i); j += sizeof(u32)) 316 ret += cdns_sprintf(cdns, buf, ret, j); 317 } 318 319 ret += scnprintf(buf + ret, RD_BUF - ret, 320 "\nDPn Control Registers\n"); 321 for (i = 0; i < num_ports; i++) 322 ret += cdns_sprintf(cdns, buf, ret, 323 CDNS_PORTCTRL + i * CDNS_PORT_OFFSET); 324 325 ret += scnprintf(buf + ret, RD_BUF - ret, 326 "\nPDIn Config Registers\n"); 327 328 /* number of PDI and ports is interchangeable */ 329 for (i = 0; i < num_ports; i++) 330 ret += cdns_sprintf(cdns, buf, ret, CDNS_PDI_CONFIG(i)); 331 332 seq_printf(s, "%s", buf); 333 kfree(buf); 334 335 return 0; 336 } 337 DEFINE_SHOW_ATTRIBUTE(cdns_reg); 338 339 static int cdns_hw_reset(void *data, u64 value) 340 { 341 struct sdw_cdns *cdns = data; 342 int ret; 343 344 if (value != 1) 345 return -EINVAL; 346 347 /* Userspace changed the hardware state behind the kernel's back */ 348 add_taint(TAINT_USER, LOCKDEP_STILL_OK); 349 350 ret = sdw_cdns_exit_reset(cdns); 351 352 dev_dbg(cdns->dev, "link hw_reset done: %d\n", ret); 353 354 return ret; 355 } 356 357 DEFINE_DEBUGFS_ATTRIBUTE(cdns_hw_reset_fops, NULL, cdns_hw_reset, "%llu\n"); 358 359 /** 360 * sdw_cdns_debugfs_init() - Cadence debugfs init 361 * @cdns: Cadence instance 362 * @root: debugfs root 363 */ 364 void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root) 365 { 366 debugfs_create_file("cdns-registers", 0400, root, cdns, &cdns_reg_fops); 367 368 debugfs_create_file("cdns-hw-reset", 0200, root, cdns, 369 &cdns_hw_reset_fops); 370 } 371 EXPORT_SYMBOL_GPL(sdw_cdns_debugfs_init); 372 373 #endif /* CONFIG_DEBUG_FS */ 374 375 /* 376 * IO Calls 377 */ 378 static enum sdw_command_response 379 cdns_fill_msg_resp(struct sdw_cdns *cdns, 380 struct sdw_msg *msg, int count, int offset) 381 { 382 int nack = 0, no_ack = 0; 383 int i; 384 385 /* check message response */ 386 for (i = 0; i < count; i++) { 387 if (!(cdns->response_buf[i] & CDNS_MCP_RESP_ACK)) { 388 no_ack = 1; 389 dev_dbg_ratelimited(cdns->dev, "Msg Ack not received\n"); 390 if (cdns->response_buf[i] & CDNS_MCP_RESP_NACK) { 391 nack = 1; 392 dev_err_ratelimited(cdns->dev, "Msg NACK received\n"); 393 } 394 } 395 } 396 397 if (nack) { 398 dev_err_ratelimited(cdns->dev, "Msg NACKed for Slave %d\n", msg->dev_num); 399 return SDW_CMD_FAIL; 400 } else if (no_ack) { 401 dev_dbg_ratelimited(cdns->dev, "Msg ignored for Slave %d\n", msg->dev_num); 402 return SDW_CMD_IGNORED; 403 } 404 405 /* fill response */ 406 for (i = 0; i < count; i++) 407 msg->buf[i + offset] = cdns->response_buf[i] >> 408 SDW_REG_SHIFT(CDNS_MCP_RESP_RDATA); 409 410 return SDW_CMD_OK; 411 } 412 413 static enum sdw_command_response 414 _cdns_xfer_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int cmd, 415 int offset, int count, bool defer) 416 { 417 unsigned long time; 418 u32 base, i, data; 419 u16 addr; 420 421 /* Program the watermark level for RX FIFO */ 422 if (cdns->msg_count != count) { 423 cdns_writel(cdns, CDNS_MCP_FIFOLEVEL, count); 424 cdns->msg_count = count; 425 } 426 427 base = CDNS_MCP_CMD_BASE; 428 addr = msg->addr; 429 430 for (i = 0; i < count; i++) { 431 data = msg->dev_num << SDW_REG_SHIFT(CDNS_MCP_CMD_DEV_ADDR); 432 data |= cmd << SDW_REG_SHIFT(CDNS_MCP_CMD_COMMAND); 433 data |= addr++ << SDW_REG_SHIFT(CDNS_MCP_CMD_REG_ADDR_L); 434 435 if (msg->flags == SDW_MSG_FLAG_WRITE) 436 data |= msg->buf[i + offset]; 437 438 data |= msg->ssp_sync << SDW_REG_SHIFT(CDNS_MCP_CMD_SSP_TAG); 439 cdns_writel(cdns, base, data); 440 base += CDNS_MCP_CMD_WORD_LEN; 441 } 442 443 if (defer) 444 return SDW_CMD_OK; 445 446 /* wait for timeout or response */ 447 time = wait_for_completion_timeout(&cdns->tx_complete, 448 msecs_to_jiffies(CDNS_TX_TIMEOUT)); 449 if (!time) { 450 dev_err(cdns->dev, "IO transfer timed out, cmd %d device %d addr %x len %d\n", 451 cmd, msg->dev_num, msg->addr, msg->len); 452 msg->len = 0; 453 return SDW_CMD_TIMEOUT; 454 } 455 456 return cdns_fill_msg_resp(cdns, msg, count, offset); 457 } 458 459 static enum sdw_command_response 460 cdns_program_scp_addr(struct sdw_cdns *cdns, struct sdw_msg *msg) 461 { 462 int nack = 0, no_ack = 0; 463 unsigned long time; 464 u32 data[2], base; 465 int i; 466 467 /* Program the watermark level for RX FIFO */ 468 if (cdns->msg_count != CDNS_SCP_RX_FIFOLEVEL) { 469 cdns_writel(cdns, CDNS_MCP_FIFOLEVEL, CDNS_SCP_RX_FIFOLEVEL); 470 cdns->msg_count = CDNS_SCP_RX_FIFOLEVEL; 471 } 472 473 data[0] = msg->dev_num << SDW_REG_SHIFT(CDNS_MCP_CMD_DEV_ADDR); 474 data[0] |= 0x3 << SDW_REG_SHIFT(CDNS_MCP_CMD_COMMAND); 475 data[1] = data[0]; 476 477 data[0] |= SDW_SCP_ADDRPAGE1 << SDW_REG_SHIFT(CDNS_MCP_CMD_REG_ADDR_L); 478 data[1] |= SDW_SCP_ADDRPAGE2 << SDW_REG_SHIFT(CDNS_MCP_CMD_REG_ADDR_L); 479 480 data[0] |= msg->addr_page1; 481 data[1] |= msg->addr_page2; 482 483 base = CDNS_MCP_CMD_BASE; 484 cdns_writel(cdns, base, data[0]); 485 base += CDNS_MCP_CMD_WORD_LEN; 486 cdns_writel(cdns, base, data[1]); 487 488 time = wait_for_completion_timeout(&cdns->tx_complete, 489 msecs_to_jiffies(CDNS_TX_TIMEOUT)); 490 if (!time) { 491 dev_err(cdns->dev, "SCP Msg trf timed out\n"); 492 msg->len = 0; 493 return SDW_CMD_TIMEOUT; 494 } 495 496 /* check response the writes */ 497 for (i = 0; i < 2; i++) { 498 if (!(cdns->response_buf[i] & CDNS_MCP_RESP_ACK)) { 499 no_ack = 1; 500 dev_err(cdns->dev, "Program SCP Ack not received\n"); 501 if (cdns->response_buf[i] & CDNS_MCP_RESP_NACK) { 502 nack = 1; 503 dev_err(cdns->dev, "Program SCP NACK received\n"); 504 } 505 } 506 } 507 508 /* For NACK, NO ack, don't return err if we are in Broadcast mode */ 509 if (nack) { 510 dev_err_ratelimited(cdns->dev, 511 "SCP_addrpage NACKed for Slave %d\n", msg->dev_num); 512 return SDW_CMD_FAIL; 513 } else if (no_ack) { 514 dev_dbg_ratelimited(cdns->dev, 515 "SCP_addrpage ignored for Slave %d\n", msg->dev_num); 516 return SDW_CMD_IGNORED; 517 } 518 519 return SDW_CMD_OK; 520 } 521 522 static int cdns_prep_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int *cmd) 523 { 524 int ret; 525 526 if (msg->page) { 527 ret = cdns_program_scp_addr(cdns, msg); 528 if (ret) { 529 msg->len = 0; 530 return ret; 531 } 532 } 533 534 switch (msg->flags) { 535 case SDW_MSG_FLAG_READ: 536 *cmd = CDNS_MCP_CMD_READ; 537 break; 538 539 case SDW_MSG_FLAG_WRITE: 540 *cmd = CDNS_MCP_CMD_WRITE; 541 break; 542 543 default: 544 dev_err(cdns->dev, "Invalid msg cmd: %d\n", msg->flags); 545 return -EINVAL; 546 } 547 548 return 0; 549 } 550 551 enum sdw_command_response 552 cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg) 553 { 554 struct sdw_cdns *cdns = bus_to_cdns(bus); 555 int cmd = 0, ret, i; 556 557 ret = cdns_prep_msg(cdns, msg, &cmd); 558 if (ret) 559 return SDW_CMD_FAIL_OTHER; 560 561 for (i = 0; i < msg->len / CDNS_MCP_CMD_LEN; i++) { 562 ret = _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN, 563 CDNS_MCP_CMD_LEN, false); 564 if (ret < 0) 565 goto exit; 566 } 567 568 if (!(msg->len % CDNS_MCP_CMD_LEN)) 569 goto exit; 570 571 ret = _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN, 572 msg->len % CDNS_MCP_CMD_LEN, false); 573 574 exit: 575 return ret; 576 } 577 EXPORT_SYMBOL(cdns_xfer_msg); 578 579 enum sdw_command_response 580 cdns_xfer_msg_defer(struct sdw_bus *bus, 581 struct sdw_msg *msg, struct sdw_defer *defer) 582 { 583 struct sdw_cdns *cdns = bus_to_cdns(bus); 584 int cmd = 0, ret; 585 586 /* for defer only 1 message is supported */ 587 if (msg->len > 1) 588 return -ENOTSUPP; 589 590 ret = cdns_prep_msg(cdns, msg, &cmd); 591 if (ret) 592 return SDW_CMD_FAIL_OTHER; 593 594 cdns->defer = defer; 595 cdns->defer->length = msg->len; 596 597 return _cdns_xfer_msg(cdns, msg, cmd, 0, msg->len, true); 598 } 599 EXPORT_SYMBOL(cdns_xfer_msg_defer); 600 601 enum sdw_command_response 602 cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num) 603 { 604 struct sdw_cdns *cdns = bus_to_cdns(bus); 605 struct sdw_msg msg; 606 607 /* Create dummy message with valid device number */ 608 memset(&msg, 0, sizeof(msg)); 609 msg.dev_num = dev_num; 610 611 return cdns_program_scp_addr(cdns, &msg); 612 } 613 EXPORT_SYMBOL(cdns_reset_page_addr); 614 615 /* 616 * IRQ handling 617 */ 618 619 static void cdns_read_response(struct sdw_cdns *cdns) 620 { 621 u32 num_resp, cmd_base; 622 int i; 623 624 num_resp = cdns_readl(cdns, CDNS_MCP_FIFOSTAT); 625 num_resp &= CDNS_MCP_RX_FIFO_AVAIL; 626 627 cmd_base = CDNS_MCP_CMD_BASE; 628 629 for (i = 0; i < num_resp; i++) { 630 cdns->response_buf[i] = cdns_readl(cdns, cmd_base); 631 cmd_base += CDNS_MCP_CMD_WORD_LEN; 632 } 633 } 634 635 static int cdns_update_slave_status(struct sdw_cdns *cdns, 636 u32 slave0, u32 slave1) 637 { 638 enum sdw_slave_status status[SDW_MAX_DEVICES + 1]; 639 bool is_slave = false; 640 u64 slave; 641 u32 mask; 642 int i, set_status; 643 644 /* combine the two status */ 645 slave = ((u64)slave1 << 32) | slave0; 646 memset(status, 0, sizeof(status)); 647 648 for (i = 0; i <= SDW_MAX_DEVICES; i++) { 649 mask = (slave >> (i * CDNS_MCP_SLAVE_STATUS_NUM)) & 650 CDNS_MCP_SLAVE_STATUS_BITS; 651 if (!mask) 652 continue; 653 654 is_slave = true; 655 set_status = 0; 656 657 if (mask & CDNS_MCP_SLAVE_INTSTAT_RESERVED) { 658 status[i] = SDW_SLAVE_RESERVED; 659 set_status++; 660 } 661 662 if (mask & CDNS_MCP_SLAVE_INTSTAT_ATTACHED) { 663 status[i] = SDW_SLAVE_ATTACHED; 664 set_status++; 665 } 666 667 if (mask & CDNS_MCP_SLAVE_INTSTAT_ALERT) { 668 status[i] = SDW_SLAVE_ALERT; 669 set_status++; 670 } 671 672 if (mask & CDNS_MCP_SLAVE_INTSTAT_NPRESENT) { 673 status[i] = SDW_SLAVE_UNATTACHED; 674 set_status++; 675 } 676 677 /* first check if Slave reported multiple status */ 678 if (set_status > 1) { 679 u32 val; 680 681 dev_warn_ratelimited(cdns->dev, 682 "Slave %d reported multiple Status: %d\n", 683 i, mask); 684 685 /* check latest status extracted from PING commands */ 686 val = cdns_readl(cdns, CDNS_MCP_SLAVE_STAT); 687 val >>= (i * 2); 688 689 switch (val & 0x3) { 690 case 0: 691 status[i] = SDW_SLAVE_UNATTACHED; 692 break; 693 case 1: 694 status[i] = SDW_SLAVE_ATTACHED; 695 break; 696 case 2: 697 status[i] = SDW_SLAVE_ALERT; 698 break; 699 case 3: 700 default: 701 status[i] = SDW_SLAVE_RESERVED; 702 break; 703 } 704 705 dev_warn_ratelimited(cdns->dev, 706 "Slave %d status updated to %d\n", 707 i, status[i]); 708 709 } 710 } 711 712 if (is_slave) 713 return sdw_handle_slave_status(&cdns->bus, status); 714 715 return 0; 716 } 717 718 /** 719 * sdw_cdns_irq() - Cadence interrupt handler 720 * @irq: irq number 721 * @dev_id: irq context 722 */ 723 irqreturn_t sdw_cdns_irq(int irq, void *dev_id) 724 { 725 struct sdw_cdns *cdns = dev_id; 726 u32 int_status; 727 int ret = IRQ_HANDLED; 728 729 /* Check if the link is up */ 730 if (!cdns->link_up) 731 return IRQ_NONE; 732 733 int_status = cdns_readl(cdns, CDNS_MCP_INTSTAT); 734 735 /* check for reserved values read as zero */ 736 if (int_status & CDNS_MCP_INT_RESERVED) 737 return IRQ_NONE; 738 739 if (!(int_status & CDNS_MCP_INT_IRQ)) 740 return IRQ_NONE; 741 742 if (int_status & CDNS_MCP_INT_RX_WL) { 743 cdns_read_response(cdns); 744 745 if (cdns->defer) { 746 cdns_fill_msg_resp(cdns, cdns->defer->msg, 747 cdns->defer->length, 0); 748 complete(&cdns->defer->complete); 749 cdns->defer = NULL; 750 } else { 751 complete(&cdns->tx_complete); 752 } 753 } 754 755 if (int_status & CDNS_MCP_INT_PARITY) { 756 /* Parity error detected by Master */ 757 dev_err_ratelimited(cdns->dev, "Parity error\n"); 758 } 759 760 if (int_status & CDNS_MCP_INT_CTRL_CLASH) { 761 /* Slave is driving bit slot during control word */ 762 dev_err_ratelimited(cdns->dev, "Bus clash for control word\n"); 763 } 764 765 if (int_status & CDNS_MCP_INT_DATA_CLASH) { 766 /* 767 * Multiple slaves trying to drive bit slot, or issue with 768 * ownership of data bits or Slave gone bonkers 769 */ 770 dev_err_ratelimited(cdns->dev, "Bus clash for data word\n"); 771 } 772 773 if (int_status & CDNS_MCP_INT_SLAVE_MASK) { 774 /* Mask the Slave interrupt and wake thread */ 775 cdns_updatel(cdns, CDNS_MCP_INTMASK, 776 CDNS_MCP_INT_SLAVE_MASK, 0); 777 778 int_status &= ~CDNS_MCP_INT_SLAVE_MASK; 779 ret = IRQ_WAKE_THREAD; 780 } 781 782 cdns_writel(cdns, CDNS_MCP_INTSTAT, int_status); 783 return ret; 784 } 785 EXPORT_SYMBOL(sdw_cdns_irq); 786 787 /** 788 * sdw_cdns_thread() - Cadence irq thread handler 789 * @irq: irq number 790 * @dev_id: irq context 791 */ 792 irqreturn_t sdw_cdns_thread(int irq, void *dev_id) 793 { 794 struct sdw_cdns *cdns = dev_id; 795 u32 slave0, slave1; 796 797 dev_dbg_ratelimited(cdns->dev, "Slave status change\n"); 798 799 slave0 = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT0); 800 slave1 = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT1); 801 802 cdns_update_slave_status(cdns, slave0, slave1); 803 cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave0); 804 cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave1); 805 806 /* clear and unmask Slave interrupt now */ 807 cdns_writel(cdns, CDNS_MCP_INTSTAT, CDNS_MCP_INT_SLAVE_MASK); 808 cdns_updatel(cdns, CDNS_MCP_INTMASK, 809 CDNS_MCP_INT_SLAVE_MASK, CDNS_MCP_INT_SLAVE_MASK); 810 811 return IRQ_HANDLED; 812 } 813 EXPORT_SYMBOL(sdw_cdns_thread); 814 815 /* 816 * init routines 817 */ 818 819 /** 820 * sdw_cdns_exit_reset() - Program reset parameters and start bus operations 821 * @cdns: Cadence instance 822 */ 823 int sdw_cdns_exit_reset(struct sdw_cdns *cdns) 824 { 825 /* program maximum length reset to be safe */ 826 cdns_updatel(cdns, CDNS_MCP_CONTROL, 827 CDNS_MCP_CONTROL_RST_DELAY, 828 CDNS_MCP_CONTROL_RST_DELAY); 829 830 /* use hardware generated reset */ 831 cdns_updatel(cdns, CDNS_MCP_CONTROL, 832 CDNS_MCP_CONTROL_HW_RST, 833 CDNS_MCP_CONTROL_HW_RST); 834 835 /* enable bus operations with clock and data */ 836 cdns_updatel(cdns, CDNS_MCP_CONFIG, 837 CDNS_MCP_CONFIG_OP, 838 CDNS_MCP_CONFIG_OP_NORMAL); 839 840 /* commit changes */ 841 return cdns_update_config(cdns); 842 } 843 EXPORT_SYMBOL(sdw_cdns_exit_reset); 844 845 /** 846 * sdw_cdns_enable_interrupt() - Enable SDW interrupts 847 * @cdns: Cadence instance 848 * @state: True if we are trying to enable interrupt. 849 */ 850 int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state) 851 { 852 u32 slave_intmask0 = 0; 853 u32 slave_intmask1 = 0; 854 u32 mask = 0; 855 856 if (!state) 857 goto update_masks; 858 859 slave_intmask0 = CDNS_MCP_SLAVE_INTMASK0_MASK; 860 slave_intmask1 = CDNS_MCP_SLAVE_INTMASK1_MASK; 861 862 /* enable detection of all slave state changes */ 863 mask = CDNS_MCP_INT_SLAVE_MASK; 864 865 /* enable detection of bus issues */ 866 mask |= CDNS_MCP_INT_CTRL_CLASH | CDNS_MCP_INT_DATA_CLASH | 867 CDNS_MCP_INT_PARITY; 868 869 /* no detection of port interrupts for now */ 870 871 /* enable detection of RX fifo level */ 872 mask |= CDNS_MCP_INT_RX_WL; 873 874 /* 875 * CDNS_MCP_INT_IRQ needs to be set otherwise all previous 876 * settings are irrelevant 877 */ 878 mask |= CDNS_MCP_INT_IRQ; 879 880 if (interrupt_mask) /* parameter override */ 881 mask = interrupt_mask; 882 883 update_masks: 884 /* clear slave interrupt status before enabling interrupt */ 885 if (state) { 886 u32 slave_state; 887 888 slave_state = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT0); 889 cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave_state); 890 slave_state = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT1); 891 cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave_state); 892 } 893 894 cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK0, slave_intmask0); 895 cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK1, slave_intmask1); 896 cdns_writel(cdns, CDNS_MCP_INTMASK, mask); 897 898 return 0; 899 } 900 EXPORT_SYMBOL(sdw_cdns_enable_interrupt); 901 902 static int cdns_allocate_pdi(struct sdw_cdns *cdns, 903 struct sdw_cdns_pdi **stream, 904 u32 num, u32 pdi_offset) 905 { 906 struct sdw_cdns_pdi *pdi; 907 int i; 908 909 if (!num) 910 return 0; 911 912 pdi = devm_kcalloc(cdns->dev, num, sizeof(*pdi), GFP_KERNEL); 913 if (!pdi) 914 return -ENOMEM; 915 916 for (i = 0; i < num; i++) { 917 pdi[i].num = i + pdi_offset; 918 } 919 920 *stream = pdi; 921 return 0; 922 } 923 924 /** 925 * sdw_cdns_pdi_init() - PDI initialization routine 926 * 927 * @cdns: Cadence instance 928 * @config: Stream configurations 929 */ 930 int sdw_cdns_pdi_init(struct sdw_cdns *cdns, 931 struct sdw_cdns_stream_config config) 932 { 933 struct sdw_cdns_streams *stream; 934 int offset; 935 int ret; 936 937 cdns->pcm.num_bd = config.pcm_bd; 938 cdns->pcm.num_in = config.pcm_in; 939 cdns->pcm.num_out = config.pcm_out; 940 cdns->pdm.num_bd = config.pdm_bd; 941 cdns->pdm.num_in = config.pdm_in; 942 cdns->pdm.num_out = config.pdm_out; 943 944 /* Allocate PDIs for PCMs */ 945 stream = &cdns->pcm; 946 947 /* we allocate PDI0 and PDI1 which are used for Bulk */ 948 offset = 0; 949 950 ret = cdns_allocate_pdi(cdns, &stream->bd, 951 stream->num_bd, offset); 952 if (ret) 953 return ret; 954 955 offset += stream->num_bd; 956 957 ret = cdns_allocate_pdi(cdns, &stream->in, 958 stream->num_in, offset); 959 if (ret) 960 return ret; 961 962 offset += stream->num_in; 963 964 ret = cdns_allocate_pdi(cdns, &stream->out, 965 stream->num_out, offset); 966 if (ret) 967 return ret; 968 969 /* Update total number of PCM PDIs */ 970 stream->num_pdi = stream->num_bd + stream->num_in + stream->num_out; 971 cdns->num_ports = stream->num_pdi; 972 973 /* Allocate PDIs for PDMs */ 974 stream = &cdns->pdm; 975 ret = cdns_allocate_pdi(cdns, &stream->bd, 976 stream->num_bd, offset); 977 if (ret) 978 return ret; 979 980 offset += stream->num_bd; 981 982 ret = cdns_allocate_pdi(cdns, &stream->in, 983 stream->num_in, offset); 984 if (ret) 985 return ret; 986 987 offset += stream->num_in; 988 989 ret = cdns_allocate_pdi(cdns, &stream->out, 990 stream->num_out, offset); 991 992 if (ret) 993 return ret; 994 995 /* Update total number of PDM PDIs */ 996 stream->num_pdi = stream->num_bd + stream->num_in + stream->num_out; 997 cdns->num_ports += stream->num_pdi; 998 999 return 0; 1000 } 1001 EXPORT_SYMBOL(sdw_cdns_pdi_init); 1002 1003 static u32 cdns_set_initial_frame_shape(int n_rows, int n_cols) 1004 { 1005 u32 val; 1006 int c; 1007 int r; 1008 1009 r = sdw_find_row_index(n_rows); 1010 c = sdw_find_col_index(n_cols) & CDNS_MCP_FRAME_SHAPE_COL_MASK; 1011 1012 val = (r << CDNS_MCP_FRAME_SHAPE_ROW_OFFSET) | c; 1013 1014 return val; 1015 } 1016 1017 /** 1018 * sdw_cdns_init() - Cadence initialization 1019 * @cdns: Cadence instance 1020 */ 1021 int sdw_cdns_init(struct sdw_cdns *cdns, bool clock_stop_exit) 1022 { 1023 struct sdw_bus *bus = &cdns->bus; 1024 struct sdw_master_prop *prop = &bus->prop; 1025 u32 val; 1026 int divider; 1027 int ret; 1028 1029 if (clock_stop_exit) { 1030 ret = cdns_clear_bit(cdns, CDNS_MCP_CONTROL, 1031 CDNS_MCP_CONTROL_CLK_STOP_CLR); 1032 if (ret < 0) { 1033 dev_err(cdns->dev, "Couldn't exit from clock stop\n"); 1034 return ret; 1035 } 1036 } 1037 1038 /* Set clock divider */ 1039 divider = (prop->mclk_freq / prop->max_clk_freq) - 1; 1040 1041 cdns_updatel(cdns, CDNS_MCP_CLK_CTRL0, 1042 CDNS_MCP_CLK_MCLKD_MASK, divider); 1043 cdns_updatel(cdns, CDNS_MCP_CLK_CTRL1, 1044 CDNS_MCP_CLK_MCLKD_MASK, divider); 1045 1046 /* 1047 * Frame shape changes after initialization have to be done 1048 * with the bank switch mechanism 1049 */ 1050 val = cdns_set_initial_frame_shape(prop->default_row, 1051 prop->default_col); 1052 cdns_writel(cdns, CDNS_MCP_FRAME_SHAPE_INIT, val); 1053 1054 /* Set SSP interval to default value */ 1055 cdns_writel(cdns, CDNS_MCP_SSP_CTRL0, CDNS_DEFAULT_SSP_INTERVAL); 1056 cdns_writel(cdns, CDNS_MCP_SSP_CTRL1, CDNS_DEFAULT_SSP_INTERVAL); 1057 1058 /* flush command FIFOs */ 1059 cdns_updatel(cdns, CDNS_MCP_CONTROL, CDNS_MCP_CONTROL_CMD_RST, 1060 CDNS_MCP_CONTROL_CMD_RST); 1061 1062 /* Set cmd accept mode */ 1063 cdns_updatel(cdns, CDNS_MCP_CONTROL, CDNS_MCP_CONTROL_CMD_ACCEPT, 1064 CDNS_MCP_CONTROL_CMD_ACCEPT); 1065 1066 /* Configure mcp config */ 1067 val = cdns_readl(cdns, CDNS_MCP_CONFIG); 1068 1069 /* Set Max cmd retry to 15 */ 1070 val |= CDNS_MCP_CONFIG_MCMD_RETRY; 1071 1072 /* Set frame delay between PREQ and ping frame to 15 frames */ 1073 val |= 0xF << SDW_REG_SHIFT(CDNS_MCP_CONFIG_MPREQ_DELAY); 1074 1075 /* Disable auto bus release */ 1076 val &= ~CDNS_MCP_CONFIG_BUS_REL; 1077 1078 /* Disable sniffer mode */ 1079 val &= ~CDNS_MCP_CONFIG_SNIFFER; 1080 1081 /* Set cmd mode for Tx and Rx cmds */ 1082 val &= ~CDNS_MCP_CONFIG_CMD; 1083 1084 cdns_writel(cdns, CDNS_MCP_CONFIG, val); 1085 1086 /* commit changes */ 1087 return cdns_update_config(cdns); 1088 } 1089 EXPORT_SYMBOL(sdw_cdns_init); 1090 1091 int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params) 1092 { 1093 struct sdw_master_prop *prop = &bus->prop; 1094 struct sdw_cdns *cdns = bus_to_cdns(bus); 1095 int mcp_clkctrl_off; 1096 int divider; 1097 1098 if (!params->curr_dr_freq) { 1099 dev_err(cdns->dev, "NULL curr_dr_freq\n"); 1100 return -EINVAL; 1101 } 1102 1103 divider = prop->mclk_freq * SDW_DOUBLE_RATE_FACTOR / 1104 params->curr_dr_freq; 1105 divider--; /* divider is 1/(N+1) */ 1106 1107 if (params->next_bank) 1108 mcp_clkctrl_off = CDNS_MCP_CLK_CTRL1; 1109 else 1110 mcp_clkctrl_off = CDNS_MCP_CLK_CTRL0; 1111 1112 cdns_updatel(cdns, mcp_clkctrl_off, CDNS_MCP_CLK_MCLKD_MASK, divider); 1113 1114 return 0; 1115 } 1116 EXPORT_SYMBOL(cdns_bus_conf); 1117 1118 static int cdns_port_params(struct sdw_bus *bus, 1119 struct sdw_port_params *p_params, unsigned int bank) 1120 { 1121 struct sdw_cdns *cdns = bus_to_cdns(bus); 1122 int dpn_config = 0, dpn_config_off; 1123 1124 if (bank) 1125 dpn_config_off = CDNS_DPN_B1_CONFIG(p_params->num); 1126 else 1127 dpn_config_off = CDNS_DPN_B0_CONFIG(p_params->num); 1128 1129 dpn_config = cdns_readl(cdns, dpn_config_off); 1130 1131 dpn_config |= ((p_params->bps - 1) << 1132 SDW_REG_SHIFT(CDNS_DPN_CONFIG_WL)); 1133 dpn_config |= (p_params->flow_mode << 1134 SDW_REG_SHIFT(CDNS_DPN_CONFIG_PORT_FLOW)); 1135 dpn_config |= (p_params->data_mode << 1136 SDW_REG_SHIFT(CDNS_DPN_CONFIG_PORT_DAT)); 1137 1138 cdns_writel(cdns, dpn_config_off, dpn_config); 1139 1140 return 0; 1141 } 1142 1143 static int cdns_transport_params(struct sdw_bus *bus, 1144 struct sdw_transport_params *t_params, 1145 enum sdw_reg_bank bank) 1146 { 1147 struct sdw_cdns *cdns = bus_to_cdns(bus); 1148 int dpn_offsetctrl = 0, dpn_offsetctrl_off; 1149 int dpn_config = 0, dpn_config_off; 1150 int dpn_hctrl = 0, dpn_hctrl_off; 1151 int num = t_params->port_num; 1152 int dpn_samplectrl_off; 1153 1154 /* 1155 * Note: Only full data port is supported on the Master side for 1156 * both PCM and PDM ports. 1157 */ 1158 1159 if (bank) { 1160 dpn_config_off = CDNS_DPN_B1_CONFIG(num); 1161 dpn_samplectrl_off = CDNS_DPN_B1_SAMPLE_CTRL(num); 1162 dpn_hctrl_off = CDNS_DPN_B1_HCTRL(num); 1163 dpn_offsetctrl_off = CDNS_DPN_B1_OFFSET_CTRL(num); 1164 } else { 1165 dpn_config_off = CDNS_DPN_B0_CONFIG(num); 1166 dpn_samplectrl_off = CDNS_DPN_B0_SAMPLE_CTRL(num); 1167 dpn_hctrl_off = CDNS_DPN_B0_HCTRL(num); 1168 dpn_offsetctrl_off = CDNS_DPN_B0_OFFSET_CTRL(num); 1169 } 1170 1171 dpn_config = cdns_readl(cdns, dpn_config_off); 1172 1173 dpn_config |= (t_params->blk_grp_ctrl << 1174 SDW_REG_SHIFT(CDNS_DPN_CONFIG_BGC)); 1175 dpn_config |= (t_params->blk_pkg_mode << 1176 SDW_REG_SHIFT(CDNS_DPN_CONFIG_BPM)); 1177 cdns_writel(cdns, dpn_config_off, dpn_config); 1178 1179 dpn_offsetctrl |= (t_params->offset1 << 1180 SDW_REG_SHIFT(CDNS_DPN_OFFSET_CTRL_1)); 1181 dpn_offsetctrl |= (t_params->offset2 << 1182 SDW_REG_SHIFT(CDNS_DPN_OFFSET_CTRL_2)); 1183 cdns_writel(cdns, dpn_offsetctrl_off, dpn_offsetctrl); 1184 1185 dpn_hctrl |= (t_params->hstart << 1186 SDW_REG_SHIFT(CDNS_DPN_HCTRL_HSTART)); 1187 dpn_hctrl |= (t_params->hstop << SDW_REG_SHIFT(CDNS_DPN_HCTRL_HSTOP)); 1188 dpn_hctrl |= (t_params->lane_ctrl << 1189 SDW_REG_SHIFT(CDNS_DPN_HCTRL_LCTRL)); 1190 1191 cdns_writel(cdns, dpn_hctrl_off, dpn_hctrl); 1192 cdns_writel(cdns, dpn_samplectrl_off, (t_params->sample_interval - 1)); 1193 1194 return 0; 1195 } 1196 1197 static int cdns_port_enable(struct sdw_bus *bus, 1198 struct sdw_enable_ch *enable_ch, unsigned int bank) 1199 { 1200 struct sdw_cdns *cdns = bus_to_cdns(bus); 1201 int dpn_chnen_off, ch_mask; 1202 1203 if (bank) 1204 dpn_chnen_off = CDNS_DPN_B1_CH_EN(enable_ch->port_num); 1205 else 1206 dpn_chnen_off = CDNS_DPN_B0_CH_EN(enable_ch->port_num); 1207 1208 ch_mask = enable_ch->ch_mask * enable_ch->enable; 1209 cdns_writel(cdns, dpn_chnen_off, ch_mask); 1210 1211 return 0; 1212 } 1213 1214 static const struct sdw_master_port_ops cdns_port_ops = { 1215 .dpn_set_port_params = cdns_port_params, 1216 .dpn_set_port_transport_params = cdns_transport_params, 1217 .dpn_port_enable_ch = cdns_port_enable, 1218 }; 1219 1220 /** 1221 * sdw_cdns_probe() - Cadence probe routine 1222 * @cdns: Cadence instance 1223 */ 1224 int sdw_cdns_probe(struct sdw_cdns *cdns) 1225 { 1226 init_completion(&cdns->tx_complete); 1227 cdns->bus.port_ops = &cdns_port_ops; 1228 1229 return 0; 1230 } 1231 EXPORT_SYMBOL(sdw_cdns_probe); 1232 1233 int cdns_set_sdw_stream(struct snd_soc_dai *dai, 1234 void *stream, bool pcm, int direction) 1235 { 1236 struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai); 1237 struct sdw_cdns_dma_data *dma; 1238 1239 dma = kzalloc(sizeof(*dma), GFP_KERNEL); 1240 if (!dma) 1241 return -ENOMEM; 1242 1243 if (pcm) 1244 dma->stream_type = SDW_STREAM_PCM; 1245 else 1246 dma->stream_type = SDW_STREAM_PDM; 1247 1248 dma->bus = &cdns->bus; 1249 dma->link_id = cdns->instance; 1250 1251 dma->stream = stream; 1252 1253 if (direction == SNDRV_PCM_STREAM_PLAYBACK) 1254 dai->playback_dma_data = dma; 1255 else 1256 dai->capture_dma_data = dma; 1257 1258 return 0; 1259 } 1260 EXPORT_SYMBOL(cdns_set_sdw_stream); 1261 1262 /** 1263 * cdns_find_pdi() - Find a free PDI 1264 * 1265 * @cdns: Cadence instance 1266 * @offset: Starting offset 1267 * @num: Number of PDIs 1268 * @pdi: PDI instances 1269 * @dai_id: DAI id 1270 * 1271 * Find a PDI for a given PDI array. The PDI num and dai_id are 1272 * expected to match, return NULL otherwise. 1273 */ 1274 static struct sdw_cdns_pdi *cdns_find_pdi(struct sdw_cdns *cdns, 1275 unsigned int offset, 1276 unsigned int num, 1277 struct sdw_cdns_pdi *pdi, 1278 int dai_id) 1279 { 1280 int i; 1281 1282 for (i = offset; i < offset + num; i++) 1283 if (pdi[i].num == dai_id) 1284 return &pdi[i]; 1285 1286 return NULL; 1287 } 1288 1289 /** 1290 * sdw_cdns_config_stream: Configure a stream 1291 * 1292 * @cdns: Cadence instance 1293 * @ch: Channel count 1294 * @dir: Data direction 1295 * @pdi: PDI to be used 1296 */ 1297 void sdw_cdns_config_stream(struct sdw_cdns *cdns, 1298 u32 ch, u32 dir, struct sdw_cdns_pdi *pdi) 1299 { 1300 u32 offset, val = 0; 1301 1302 if (dir == SDW_DATA_DIR_RX) 1303 val = CDNS_PORTCTRL_DIRN; 1304 1305 offset = CDNS_PORTCTRL + pdi->num * CDNS_PORT_OFFSET; 1306 cdns_updatel(cdns, offset, CDNS_PORTCTRL_DIRN, val); 1307 1308 val = pdi->num; 1309 val |= ((1 << ch) - 1) << SDW_REG_SHIFT(CDNS_PDI_CONFIG_CHANNEL); 1310 cdns_writel(cdns, CDNS_PDI_CONFIG(pdi->num), val); 1311 } 1312 EXPORT_SYMBOL(sdw_cdns_config_stream); 1313 1314 /** 1315 * sdw_cdns_alloc_pdi() - Allocate a PDI 1316 * 1317 * @cdns: Cadence instance 1318 * @stream: Stream to be allocated 1319 * @ch: Channel count 1320 * @dir: Data direction 1321 * @dai_id: DAI id 1322 */ 1323 struct sdw_cdns_pdi *sdw_cdns_alloc_pdi(struct sdw_cdns *cdns, 1324 struct sdw_cdns_streams *stream, 1325 u32 ch, u32 dir, int dai_id) 1326 { 1327 struct sdw_cdns_pdi *pdi = NULL; 1328 1329 if (dir == SDW_DATA_DIR_RX) 1330 pdi = cdns_find_pdi(cdns, 0, stream->num_in, stream->in, 1331 dai_id); 1332 else 1333 pdi = cdns_find_pdi(cdns, 0, stream->num_out, stream->out, 1334 dai_id); 1335 1336 /* check if we found a PDI, else find in bi-directional */ 1337 if (!pdi) 1338 pdi = cdns_find_pdi(cdns, 2, stream->num_bd, stream->bd, 1339 dai_id); 1340 1341 if (pdi) { 1342 pdi->l_ch_num = 0; 1343 pdi->h_ch_num = ch - 1; 1344 pdi->dir = dir; 1345 pdi->ch_count = ch; 1346 } 1347 1348 return pdi; 1349 } 1350 EXPORT_SYMBOL(sdw_cdns_alloc_pdi); 1351 1352 MODULE_LICENSE("Dual BSD/GPL"); 1353 MODULE_DESCRIPTION("Cadence Soundwire Library"); 1354