1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2019, Linaro Limited 3 4 #include <linux/clk.h> 5 #include <linux/completion.h> 6 #include <linux/interrupt.h> 7 #include <linux/io.h> 8 #include <linux/kernel.h> 9 #include <linux/module.h> 10 #include <linux/debugfs.h> 11 #include <linux/of.h> 12 #include <linux/of_irq.h> 13 #include <linux/of_device.h> 14 #include <linux/regmap.h> 15 #include <linux/slab.h> 16 #include <linux/slimbus.h> 17 #include <linux/soundwire/sdw.h> 18 #include <linux/soundwire/sdw_registers.h> 19 #include <sound/pcm_params.h> 20 #include <sound/soc.h> 21 #include "bus.h" 22 23 #define SWRM_COMP_HW_VERSION 0x00 24 #define SWRM_COMP_CFG_ADDR 0x04 25 #define SWRM_COMP_CFG_IRQ_LEVEL_OR_PULSE_MSK BIT(1) 26 #define SWRM_COMP_CFG_ENABLE_MSK BIT(0) 27 #define SWRM_COMP_PARAMS 0x100 28 #define SWRM_COMP_PARAMS_WR_FIFO_DEPTH GENMASK(14, 10) 29 #define SWRM_COMP_PARAMS_RD_FIFO_DEPTH GENMASK(19, 15) 30 #define SWRM_COMP_PARAMS_DOUT_PORTS_MASK GENMASK(4, 0) 31 #define SWRM_COMP_PARAMS_DIN_PORTS_MASK GENMASK(9, 5) 32 #define SWRM_INTERRUPT_STATUS 0x200 33 #define SWRM_INTERRUPT_STATUS_RMSK GENMASK(16, 0) 34 #define SWRM_INTERRUPT_STATUS_SLAVE_PEND_IRQ BIT(0) 35 #define SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED BIT(1) 36 #define SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS BIT(2) 37 #define SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET BIT(3) 38 #define SWRM_INTERRUPT_STATUS_RD_FIFO_OVERFLOW BIT(4) 39 #define SWRM_INTERRUPT_STATUS_RD_FIFO_UNDERFLOW BIT(5) 40 #define SWRM_INTERRUPT_STATUS_WR_CMD_FIFO_OVERFLOW BIT(6) 41 #define SWRM_INTERRUPT_STATUS_CMD_ERROR BIT(7) 42 #define SWRM_INTERRUPT_STATUS_DOUT_PORT_COLLISION BIT(8) 43 #define SWRM_INTERRUPT_STATUS_READ_EN_RD_VALID_MISMATCH BIT(9) 44 #define SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED BIT(10) 45 #define SWRM_INTERRUPT_STATUS_BUS_RESET_FINISHED_V2 BIT(13) 46 #define SWRM_INTERRUPT_STATUS_CLK_STOP_FINISHED_V2 BIT(14) 47 #define SWRM_INTERRUPT_STATUS_EXT_CLK_STOP_WAKEUP BIT(16) 48 #define SWRM_INTERRUPT_MAX 17 49 #define SWRM_INTERRUPT_MASK_ADDR 0x204 50 #define SWRM_INTERRUPT_CLEAR 0x208 51 #define SWRM_INTERRUPT_CPU_EN 0x210 52 #define SWRM_CMD_FIFO_WR_CMD 0x300 53 #define SWRM_CMD_FIFO_RD_CMD 0x304 54 #define SWRM_CMD_FIFO_CMD 0x308 55 #define SWRM_CMD_FIFO_FLUSH 0x1 56 #define SWRM_CMD_FIFO_STATUS 0x30C 57 #define SWRM_RD_CMD_FIFO_CNT_MASK GENMASK(20, 16) 58 #define SWRM_WR_CMD_FIFO_CNT_MASK GENMASK(12, 8) 59 #define SWRM_CMD_FIFO_CFG_ADDR 0x314 60 #define SWRM_CONTINUE_EXEC_ON_CMD_IGNORE BIT(31) 61 #define SWRM_RD_WR_CMD_RETRIES 0x7 62 #define SWRM_CMD_FIFO_RD_FIFO_ADDR 0x318 63 #define SWRM_RD_FIFO_CMD_ID_MASK GENMASK(11, 8) 64 #define SWRM_ENUMERATOR_CFG_ADDR 0x500 65 #define SWRM_ENUMERATOR_SLAVE_DEV_ID_1(m) (0x530 + 0x8 * (m)) 66 #define SWRM_ENUMERATOR_SLAVE_DEV_ID_2(m) (0x534 + 0x8 * (m)) 67 #define SWRM_MCP_FRAME_CTRL_BANK_ADDR(m) (0x101C + 0x40 * (m)) 68 #define SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK GENMASK(2, 0) 69 #define SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK GENMASK(7, 3) 70 #define SWRM_MCP_BUS_CTRL 0x1044 71 #define SWRM_MCP_BUS_CLK_START BIT(1) 72 #define SWRM_MCP_CFG_ADDR 0x1048 73 #define SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK GENMASK(21, 17) 74 #define SWRM_DEF_CMD_NO_PINGS 0x1f 75 #define SWRM_MCP_STATUS 0x104C 76 #define SWRM_MCP_STATUS_BANK_NUM_MASK BIT(0) 77 #define SWRM_MCP_SLV_STATUS 0x1090 78 #define SWRM_MCP_SLV_STATUS_MASK GENMASK(1, 0) 79 #define SWRM_MCP_SLV_STATUS_SZ 2 80 #define SWRM_DP_PORT_CTRL_BANK(n, m) (0x1124 + 0x100 * (n - 1) + 0x40 * m) 81 #define SWRM_DP_PORT_CTRL_2_BANK(n, m) (0x1128 + 0x100 * (n - 1) + 0x40 * m) 82 #define SWRM_DP_BLOCK_CTRL_1(n) (0x112C + 0x100 * (n - 1)) 83 #define SWRM_DP_BLOCK_CTRL2_BANK(n, m) (0x1130 + 0x100 * (n - 1) + 0x40 * m) 84 #define SWRM_DP_PORT_HCTRL_BANK(n, m) (0x1134 + 0x100 * (n - 1) + 0x40 * m) 85 #define SWRM_DP_BLOCK_CTRL3_BANK(n, m) (0x1138 + 0x100 * (n - 1) + 0x40 * m) 86 #define SWRM_DIN_DPn_PCM_PORT_CTRL(n) (0x1054 + 0x100 * (n - 1)) 87 #define SWR_MSTR_MAX_REG_ADDR (0x1740) 88 89 #define SWRM_DP_PORT_CTRL_EN_CHAN_SHFT 0x18 90 #define SWRM_DP_PORT_CTRL_OFFSET2_SHFT 0x10 91 #define SWRM_DP_PORT_CTRL_OFFSET1_SHFT 0x08 92 #define SWRM_AHB_BRIDGE_WR_DATA_0 0xc85 93 #define SWRM_AHB_BRIDGE_WR_ADDR_0 0xc89 94 #define SWRM_AHB_BRIDGE_RD_ADDR_0 0xc8d 95 #define SWRM_AHB_BRIDGE_RD_DATA_0 0xc91 96 97 #define SWRM_REG_VAL_PACK(data, dev, id, reg) \ 98 ((reg) | ((id) << 16) | ((dev) << 20) | ((data) << 24)) 99 100 #define SWRM_SPECIAL_CMD_ID 0xF 101 #define MAX_FREQ_NUM 1 102 #define TIMEOUT_MS (2 * HZ) 103 #define QCOM_SWRM_MAX_RD_LEN 0x1 104 #define QCOM_SDW_MAX_PORTS 14 105 #define DEFAULT_CLK_FREQ 9600000 106 #define SWRM_MAX_DAIS 0xF 107 #define SWR_INVALID_PARAM 0xFF 108 #define SWR_HSTOP_MAX_VAL 0xF 109 #define SWR_HSTART_MIN_VAL 0x0 110 #define SWR_BROADCAST_CMD_ID 0x0F 111 #define SWR_MAX_CMD_ID 14 112 #define MAX_FIFO_RD_RETRY 3 113 #define SWR_OVERFLOW_RETRY_COUNT 30 114 115 struct qcom_swrm_port_config { 116 u8 si; 117 u8 off1; 118 u8 off2; 119 u8 bp_mode; 120 u8 hstart; 121 u8 hstop; 122 u8 word_length; 123 u8 blk_group_count; 124 u8 lane_control; 125 }; 126 127 struct qcom_swrm_ctrl { 128 struct sdw_bus bus; 129 struct device *dev; 130 struct regmap *regmap; 131 void __iomem *mmio; 132 #ifdef CONFIG_DEBUG_FS 133 struct dentry *debugfs; 134 #endif 135 struct completion broadcast; 136 struct completion enumeration; 137 struct work_struct slave_work; 138 /* Port alloc/free lock */ 139 struct mutex port_lock; 140 struct clk *hclk; 141 u8 wr_cmd_id; 142 u8 rd_cmd_id; 143 int irq; 144 unsigned int version; 145 int num_din_ports; 146 int num_dout_ports; 147 int cols_index; 148 int rows_index; 149 unsigned long dout_port_mask; 150 unsigned long din_port_mask; 151 u32 intr_mask; 152 u8 rcmd_id; 153 u8 wcmd_id; 154 struct qcom_swrm_port_config pconfig[QCOM_SDW_MAX_PORTS]; 155 struct sdw_stream_runtime *sruntime[SWRM_MAX_DAIS]; 156 enum sdw_slave_status status[SDW_MAX_DEVICES]; 157 int (*reg_read)(struct qcom_swrm_ctrl *ctrl, int reg, u32 *val); 158 int (*reg_write)(struct qcom_swrm_ctrl *ctrl, int reg, int val); 159 u32 slave_status; 160 u32 wr_fifo_depth; 161 u32 rd_fifo_depth; 162 }; 163 164 struct qcom_swrm_data { 165 u32 default_cols; 166 u32 default_rows; 167 }; 168 169 static struct qcom_swrm_data swrm_v1_3_data = { 170 .default_rows = 48, 171 .default_cols = 16, 172 }; 173 174 static struct qcom_swrm_data swrm_v1_5_data = { 175 .default_rows = 50, 176 .default_cols = 16, 177 }; 178 179 #define to_qcom_sdw(b) container_of(b, struct qcom_swrm_ctrl, bus) 180 181 static int qcom_swrm_ahb_reg_read(struct qcom_swrm_ctrl *ctrl, int reg, 182 u32 *val) 183 { 184 struct regmap *wcd_regmap = ctrl->regmap; 185 int ret; 186 187 /* pg register + offset */ 188 ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_RD_ADDR_0, 189 (u8 *)®, 4); 190 if (ret < 0) 191 return SDW_CMD_FAIL; 192 193 ret = regmap_bulk_read(wcd_regmap, SWRM_AHB_BRIDGE_RD_DATA_0, 194 val, 4); 195 if (ret < 0) 196 return SDW_CMD_FAIL; 197 198 return SDW_CMD_OK; 199 } 200 201 static int qcom_swrm_ahb_reg_write(struct qcom_swrm_ctrl *ctrl, 202 int reg, int val) 203 { 204 struct regmap *wcd_regmap = ctrl->regmap; 205 int ret; 206 /* pg register + offset */ 207 ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_WR_DATA_0, 208 (u8 *)&val, 4); 209 if (ret) 210 return SDW_CMD_FAIL; 211 212 /* write address register */ 213 ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_WR_ADDR_0, 214 (u8 *)®, 4); 215 if (ret) 216 return SDW_CMD_FAIL; 217 218 return SDW_CMD_OK; 219 } 220 221 static int qcom_swrm_cpu_reg_read(struct qcom_swrm_ctrl *ctrl, int reg, 222 u32 *val) 223 { 224 *val = readl(ctrl->mmio + reg); 225 return SDW_CMD_OK; 226 } 227 228 static int qcom_swrm_cpu_reg_write(struct qcom_swrm_ctrl *ctrl, int reg, 229 int val) 230 { 231 writel(val, ctrl->mmio + reg); 232 return SDW_CMD_OK; 233 } 234 235 static u32 swrm_get_packed_reg_val(u8 *cmd_id, u8 cmd_data, 236 u8 dev_addr, u16 reg_addr) 237 { 238 u32 val; 239 u8 id = *cmd_id; 240 241 if (id != SWR_BROADCAST_CMD_ID) { 242 if (id < SWR_MAX_CMD_ID) 243 id += 1; 244 else 245 id = 0; 246 *cmd_id = id; 247 } 248 val = SWRM_REG_VAL_PACK(cmd_data, dev_addr, id, reg_addr); 249 250 return val; 251 } 252 253 static int swrm_wait_for_rd_fifo_avail(struct qcom_swrm_ctrl *swrm) 254 { 255 u32 fifo_outstanding_data, value; 256 int fifo_retry_count = SWR_OVERFLOW_RETRY_COUNT; 257 258 do { 259 /* Check for fifo underflow during read */ 260 swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value); 261 fifo_outstanding_data = FIELD_GET(SWRM_RD_CMD_FIFO_CNT_MASK, value); 262 263 /* Check if read data is available in read fifo */ 264 if (fifo_outstanding_data > 0) 265 return 0; 266 267 usleep_range(500, 510); 268 } while (fifo_retry_count--); 269 270 if (fifo_outstanding_data == 0) { 271 dev_err_ratelimited(swrm->dev, "%s err read underflow\n", __func__); 272 return -EIO; 273 } 274 275 return 0; 276 } 277 278 static int swrm_wait_for_wr_fifo_avail(struct qcom_swrm_ctrl *swrm) 279 { 280 u32 fifo_outstanding_cmds, value; 281 int fifo_retry_count = SWR_OVERFLOW_RETRY_COUNT; 282 283 do { 284 /* Check for fifo overflow during write */ 285 swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value); 286 fifo_outstanding_cmds = FIELD_GET(SWRM_WR_CMD_FIFO_CNT_MASK, value); 287 288 /* Check for space in write fifo before writing */ 289 if (fifo_outstanding_cmds < swrm->wr_fifo_depth) 290 return 0; 291 292 usleep_range(500, 510); 293 } while (fifo_retry_count--); 294 295 if (fifo_outstanding_cmds == swrm->wr_fifo_depth) { 296 dev_err_ratelimited(swrm->dev, "%s err write overflow\n", __func__); 297 return -EIO; 298 } 299 300 return 0; 301 } 302 303 static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *swrm, u8 cmd_data, 304 u8 dev_addr, u16 reg_addr) 305 { 306 307 u32 val; 308 int ret = 0; 309 u8 cmd_id = 0x0; 310 311 if (dev_addr == SDW_BROADCAST_DEV_NUM) { 312 cmd_id = SWR_BROADCAST_CMD_ID; 313 val = swrm_get_packed_reg_val(&cmd_id, cmd_data, 314 dev_addr, reg_addr); 315 } else { 316 val = swrm_get_packed_reg_val(&swrm->wcmd_id, cmd_data, 317 dev_addr, reg_addr); 318 } 319 320 if (swrm_wait_for_wr_fifo_avail(swrm)) 321 return SDW_CMD_FAIL_OTHER; 322 323 /* Its assumed that write is okay as we do not get any status back */ 324 swrm->reg_write(swrm, SWRM_CMD_FIFO_WR_CMD, val); 325 326 /* version 1.3 or less */ 327 if (swrm->version <= 0x01030000) 328 usleep_range(150, 155); 329 330 if (cmd_id == SWR_BROADCAST_CMD_ID) { 331 /* 332 * sleep for 10ms for MSM soundwire variant to allow broadcast 333 * command to complete. 334 */ 335 ret = wait_for_completion_timeout(&swrm->broadcast, 336 msecs_to_jiffies(TIMEOUT_MS)); 337 if (!ret) 338 ret = SDW_CMD_IGNORED; 339 else 340 ret = SDW_CMD_OK; 341 342 } else { 343 ret = SDW_CMD_OK; 344 } 345 return ret; 346 } 347 348 static int qcom_swrm_cmd_fifo_rd_cmd(struct qcom_swrm_ctrl *swrm, 349 u8 dev_addr, u16 reg_addr, 350 u32 len, u8 *rval) 351 { 352 u32 cmd_data, cmd_id, val, retry_attempt = 0; 353 354 val = swrm_get_packed_reg_val(&swrm->rcmd_id, len, dev_addr, reg_addr); 355 356 /* wait for FIFO RD to complete to avoid overflow */ 357 usleep_range(100, 105); 358 swrm->reg_write(swrm, SWRM_CMD_FIFO_RD_CMD, val); 359 /* wait for FIFO RD CMD complete to avoid overflow */ 360 usleep_range(250, 255); 361 362 if (swrm_wait_for_rd_fifo_avail(swrm)) 363 return SDW_CMD_FAIL_OTHER; 364 365 do { 366 swrm->reg_read(swrm, SWRM_CMD_FIFO_RD_FIFO_ADDR, &cmd_data); 367 rval[0] = cmd_data & 0xFF; 368 cmd_id = FIELD_GET(SWRM_RD_FIFO_CMD_ID_MASK, cmd_data); 369 370 if (cmd_id != swrm->rcmd_id) { 371 if (retry_attempt < (MAX_FIFO_RD_RETRY - 1)) { 372 /* wait 500 us before retry on fifo read failure */ 373 usleep_range(500, 505); 374 swrm->reg_write(swrm, SWRM_CMD_FIFO_CMD, 375 SWRM_CMD_FIFO_FLUSH); 376 swrm->reg_write(swrm, SWRM_CMD_FIFO_RD_CMD, val); 377 } 378 retry_attempt++; 379 } else { 380 return SDW_CMD_OK; 381 } 382 383 } while (retry_attempt < MAX_FIFO_RD_RETRY); 384 385 dev_err(swrm->dev, "failed to read fifo: reg: 0x%x, rcmd_id: 0x%x,\ 386 dev_num: 0x%x, cmd_data: 0x%x\n", 387 reg_addr, swrm->rcmd_id, dev_addr, cmd_data); 388 389 return SDW_CMD_IGNORED; 390 } 391 392 static int qcom_swrm_get_alert_slave_dev_num(struct qcom_swrm_ctrl *ctrl) 393 { 394 u32 val, status; 395 int dev_num; 396 397 ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val); 398 399 for (dev_num = 0; dev_num < SDW_MAX_DEVICES; dev_num++) { 400 status = (val >> (dev_num * SWRM_MCP_SLV_STATUS_SZ)); 401 402 if ((status & SWRM_MCP_SLV_STATUS_MASK) == SDW_SLAVE_ALERT) { 403 ctrl->status[dev_num] = status; 404 return dev_num; 405 } 406 } 407 408 return -EINVAL; 409 } 410 411 static void qcom_swrm_get_device_status(struct qcom_swrm_ctrl *ctrl) 412 { 413 u32 val; 414 int i; 415 416 ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val); 417 ctrl->slave_status = val; 418 419 for (i = 0; i < SDW_MAX_DEVICES; i++) { 420 u32 s; 421 422 s = (val >> (i * 2)); 423 s &= SWRM_MCP_SLV_STATUS_MASK; 424 ctrl->status[i] = s; 425 } 426 } 427 428 static void qcom_swrm_set_slave_dev_num(struct sdw_bus *bus, 429 struct sdw_slave *slave, int devnum) 430 { 431 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 432 u32 status; 433 434 ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &status); 435 status = (status >> (devnum * SWRM_MCP_SLV_STATUS_SZ)); 436 status &= SWRM_MCP_SLV_STATUS_MASK; 437 438 if (status == SDW_SLAVE_ATTACHED) { 439 if (slave) 440 slave->dev_num = devnum; 441 mutex_lock(&bus->bus_lock); 442 set_bit(devnum, bus->assigned); 443 mutex_unlock(&bus->bus_lock); 444 } 445 } 446 447 static int qcom_swrm_enumerate(struct sdw_bus *bus) 448 { 449 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 450 struct sdw_slave *slave, *_s; 451 struct sdw_slave_id id; 452 u32 val1, val2; 453 bool found; 454 u64 addr; 455 int i; 456 char *buf1 = (char *)&val1, *buf2 = (char *)&val2; 457 458 for (i = 1; i <= SDW_MAX_DEVICES; i++) { 459 /*SCP_Devid5 - Devid 4*/ 460 ctrl->reg_read(ctrl, SWRM_ENUMERATOR_SLAVE_DEV_ID_1(i), &val1); 461 462 /*SCP_Devid3 - DevId 2 Devid 1 Devid 0*/ 463 ctrl->reg_read(ctrl, SWRM_ENUMERATOR_SLAVE_DEV_ID_2(i), &val2); 464 465 if (!val1 && !val2) 466 break; 467 468 addr = buf2[1] | (buf2[0] << 8) | (buf1[3] << 16) | 469 ((u64)buf1[2] << 24) | ((u64)buf1[1] << 32) | 470 ((u64)buf1[0] << 40); 471 472 sdw_extract_slave_id(bus, addr, &id); 473 found = false; 474 /* Now compare with entries */ 475 list_for_each_entry_safe(slave, _s, &bus->slaves, node) { 476 if (sdw_compare_devid(slave, id) == 0) { 477 qcom_swrm_set_slave_dev_num(bus, slave, i); 478 found = true; 479 break; 480 } 481 } 482 483 if (!found) { 484 qcom_swrm_set_slave_dev_num(bus, NULL, i); 485 sdw_slave_add(bus, &id, NULL); 486 } 487 } 488 489 complete(&ctrl->enumeration); 490 return 0; 491 } 492 493 static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id) 494 { 495 struct qcom_swrm_ctrl *swrm = dev_id; 496 u32 value, intr_sts, intr_sts_masked, slave_status; 497 u32 i; 498 int devnum; 499 int ret = IRQ_HANDLED; 500 501 swrm->reg_read(swrm, SWRM_INTERRUPT_STATUS, &intr_sts); 502 intr_sts_masked = intr_sts & swrm->intr_mask; 503 504 do { 505 for (i = 0; i < SWRM_INTERRUPT_MAX; i++) { 506 value = intr_sts_masked & BIT(i); 507 if (!value) 508 continue; 509 510 switch (value) { 511 case SWRM_INTERRUPT_STATUS_SLAVE_PEND_IRQ: 512 devnum = qcom_swrm_get_alert_slave_dev_num(swrm); 513 if (devnum < 0) { 514 dev_err_ratelimited(swrm->dev, 515 "no slave alert found.spurious interrupt\n"); 516 } else { 517 sdw_handle_slave_status(&swrm->bus, swrm->status); 518 } 519 520 break; 521 case SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED: 522 case SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS: 523 dev_err_ratelimited(swrm->dev, "%s: SWR new slave attached\n", 524 __func__); 525 swrm->reg_read(swrm, SWRM_MCP_SLV_STATUS, &slave_status); 526 if (swrm->slave_status == slave_status) { 527 dev_err(swrm->dev, "Slave status not changed %x\n", 528 slave_status); 529 } else { 530 qcom_swrm_get_device_status(swrm); 531 qcom_swrm_enumerate(&swrm->bus); 532 sdw_handle_slave_status(&swrm->bus, swrm->status); 533 } 534 break; 535 case SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET: 536 dev_err_ratelimited(swrm->dev, 537 "%s: SWR bus clsh detected\n", 538 __func__); 539 swrm->intr_mask &= ~SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET; 540 swrm->reg_write(swrm, SWRM_INTERRUPT_CPU_EN, swrm->intr_mask); 541 break; 542 case SWRM_INTERRUPT_STATUS_RD_FIFO_OVERFLOW: 543 swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value); 544 dev_err_ratelimited(swrm->dev, 545 "%s: SWR read FIFO overflow fifo status 0x%x\n", 546 __func__, value); 547 break; 548 case SWRM_INTERRUPT_STATUS_RD_FIFO_UNDERFLOW: 549 swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value); 550 dev_err_ratelimited(swrm->dev, 551 "%s: SWR read FIFO underflow fifo status 0x%x\n", 552 __func__, value); 553 break; 554 case SWRM_INTERRUPT_STATUS_WR_CMD_FIFO_OVERFLOW: 555 swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value); 556 dev_err(swrm->dev, 557 "%s: SWR write FIFO overflow fifo status %x\n", 558 __func__, value); 559 swrm->reg_write(swrm, SWRM_CMD_FIFO_CMD, 0x1); 560 break; 561 case SWRM_INTERRUPT_STATUS_CMD_ERROR: 562 swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value); 563 dev_err_ratelimited(swrm->dev, 564 "%s: SWR CMD error, fifo status 0x%x, flushing fifo\n", 565 __func__, value); 566 swrm->reg_write(swrm, SWRM_CMD_FIFO_CMD, 0x1); 567 break; 568 case SWRM_INTERRUPT_STATUS_DOUT_PORT_COLLISION: 569 dev_err_ratelimited(swrm->dev, 570 "%s: SWR Port collision detected\n", 571 __func__); 572 swrm->intr_mask &= ~SWRM_INTERRUPT_STATUS_DOUT_PORT_COLLISION; 573 swrm->reg_write(swrm, 574 SWRM_INTERRUPT_CPU_EN, swrm->intr_mask); 575 break; 576 case SWRM_INTERRUPT_STATUS_READ_EN_RD_VALID_MISMATCH: 577 dev_err_ratelimited(swrm->dev, 578 "%s: SWR read enable valid mismatch\n", 579 __func__); 580 swrm->intr_mask &= 581 ~SWRM_INTERRUPT_STATUS_READ_EN_RD_VALID_MISMATCH; 582 swrm->reg_write(swrm, 583 SWRM_INTERRUPT_CPU_EN, swrm->intr_mask); 584 break; 585 case SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED: 586 complete(&swrm->broadcast); 587 break; 588 case SWRM_INTERRUPT_STATUS_BUS_RESET_FINISHED_V2: 589 break; 590 case SWRM_INTERRUPT_STATUS_CLK_STOP_FINISHED_V2: 591 break; 592 case SWRM_INTERRUPT_STATUS_EXT_CLK_STOP_WAKEUP: 593 break; 594 default: 595 dev_err_ratelimited(swrm->dev, 596 "%s: SWR unknown interrupt value: %d\n", 597 __func__, value); 598 ret = IRQ_NONE; 599 break; 600 } 601 } 602 swrm->reg_write(swrm, SWRM_INTERRUPT_CLEAR, intr_sts); 603 swrm->reg_read(swrm, SWRM_INTERRUPT_STATUS, &intr_sts); 604 intr_sts_masked = intr_sts & swrm->intr_mask; 605 } while (intr_sts_masked); 606 607 return ret; 608 } 609 610 static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl) 611 { 612 u32 val; 613 614 /* Clear Rows and Cols */ 615 val = FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK, ctrl->rows_index); 616 val |= FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK, ctrl->cols_index); 617 618 ctrl->reg_write(ctrl, SWRM_MCP_FRAME_CTRL_BANK_ADDR(0), val); 619 620 /* Enable Auto enumeration */ 621 ctrl->reg_write(ctrl, SWRM_ENUMERATOR_CFG_ADDR, 1); 622 623 ctrl->intr_mask = SWRM_INTERRUPT_STATUS_RMSK; 624 /* Mask soundwire interrupts */ 625 ctrl->reg_write(ctrl, SWRM_INTERRUPT_MASK_ADDR, 626 SWRM_INTERRUPT_STATUS_RMSK); 627 628 /* Configure No pings */ 629 ctrl->reg_read(ctrl, SWRM_MCP_CFG_ADDR, &val); 630 u32p_replace_bits(&val, SWRM_DEF_CMD_NO_PINGS, SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK); 631 ctrl->reg_write(ctrl, SWRM_MCP_CFG_ADDR, val); 632 633 ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL, SWRM_MCP_BUS_CLK_START); 634 /* Configure number of retries of a read/write cmd */ 635 if (ctrl->version > 0x01050001) { 636 /* Only for versions >= 1.5.1 */ 637 ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CFG_ADDR, 638 SWRM_RD_WR_CMD_RETRIES | 639 SWRM_CONTINUE_EXEC_ON_CMD_IGNORE); 640 } else { 641 ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CFG_ADDR, 642 SWRM_RD_WR_CMD_RETRIES); 643 } 644 645 /* Set IRQ to PULSE */ 646 ctrl->reg_write(ctrl, SWRM_COMP_CFG_ADDR, 647 SWRM_COMP_CFG_IRQ_LEVEL_OR_PULSE_MSK | 648 SWRM_COMP_CFG_ENABLE_MSK); 649 650 /* enable CPU IRQs */ 651 if (ctrl->mmio) { 652 ctrl->reg_write(ctrl, SWRM_INTERRUPT_CPU_EN, 653 SWRM_INTERRUPT_STATUS_RMSK); 654 } 655 ctrl->slave_status = 0; 656 ctrl->reg_read(ctrl, SWRM_COMP_PARAMS, &val); 657 ctrl->rd_fifo_depth = FIELD_GET(SWRM_COMP_PARAMS_RD_FIFO_DEPTH, val); 658 ctrl->wr_fifo_depth = FIELD_GET(SWRM_COMP_PARAMS_WR_FIFO_DEPTH, val); 659 660 return 0; 661 } 662 663 static enum sdw_command_response qcom_swrm_xfer_msg(struct sdw_bus *bus, 664 struct sdw_msg *msg) 665 { 666 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 667 int ret, i, len; 668 669 if (msg->flags == SDW_MSG_FLAG_READ) { 670 for (i = 0; i < msg->len;) { 671 if ((msg->len - i) < QCOM_SWRM_MAX_RD_LEN) 672 len = msg->len - i; 673 else 674 len = QCOM_SWRM_MAX_RD_LEN; 675 676 ret = qcom_swrm_cmd_fifo_rd_cmd(ctrl, msg->dev_num, 677 msg->addr + i, len, 678 &msg->buf[i]); 679 if (ret) 680 return ret; 681 682 i = i + len; 683 } 684 } else if (msg->flags == SDW_MSG_FLAG_WRITE) { 685 for (i = 0; i < msg->len; i++) { 686 ret = qcom_swrm_cmd_fifo_wr_cmd(ctrl, msg->buf[i], 687 msg->dev_num, 688 msg->addr + i); 689 if (ret) 690 return SDW_CMD_IGNORED; 691 } 692 } 693 694 return SDW_CMD_OK; 695 } 696 697 static int qcom_swrm_pre_bank_switch(struct sdw_bus *bus) 698 { 699 u32 reg = SWRM_MCP_FRAME_CTRL_BANK_ADDR(bus->params.next_bank); 700 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 701 u32 val; 702 703 ctrl->reg_read(ctrl, reg, &val); 704 705 u32p_replace_bits(&val, ctrl->cols_index, SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK); 706 u32p_replace_bits(&val, ctrl->rows_index, SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK); 707 708 return ctrl->reg_write(ctrl, reg, val); 709 } 710 711 static int qcom_swrm_port_params(struct sdw_bus *bus, 712 struct sdw_port_params *p_params, 713 unsigned int bank) 714 { 715 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 716 717 return ctrl->reg_write(ctrl, SWRM_DP_BLOCK_CTRL_1(p_params->num), 718 p_params->bps - 1); 719 720 } 721 722 static int qcom_swrm_transport_params(struct sdw_bus *bus, 723 struct sdw_transport_params *params, 724 enum sdw_reg_bank bank) 725 { 726 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 727 struct qcom_swrm_port_config *pcfg; 728 u32 value; 729 int reg = SWRM_DP_PORT_CTRL_BANK((params->port_num), bank); 730 int ret; 731 732 pcfg = &ctrl->pconfig[params->port_num]; 733 734 value = pcfg->off1 << SWRM_DP_PORT_CTRL_OFFSET1_SHFT; 735 value |= pcfg->off2 << SWRM_DP_PORT_CTRL_OFFSET2_SHFT; 736 value |= pcfg->si; 737 738 ret = ctrl->reg_write(ctrl, reg, value); 739 if (ret) 740 goto err; 741 742 if (pcfg->lane_control != SWR_INVALID_PARAM) { 743 reg = SWRM_DP_PORT_CTRL_2_BANK(params->port_num, bank); 744 value = pcfg->lane_control; 745 ret = ctrl->reg_write(ctrl, reg, value); 746 if (ret) 747 goto err; 748 } 749 750 if (pcfg->blk_group_count != SWR_INVALID_PARAM) { 751 reg = SWRM_DP_BLOCK_CTRL2_BANK(params->port_num, bank); 752 value = pcfg->blk_group_count; 753 ret = ctrl->reg_write(ctrl, reg, value); 754 if (ret) 755 goto err; 756 } 757 758 if (pcfg->hstart != SWR_INVALID_PARAM 759 && pcfg->hstop != SWR_INVALID_PARAM) { 760 reg = SWRM_DP_PORT_HCTRL_BANK(params->port_num, bank); 761 value = (pcfg->hstop << 4) | pcfg->hstart; 762 ret = ctrl->reg_write(ctrl, reg, value); 763 } else { 764 reg = SWRM_DP_PORT_HCTRL_BANK(params->port_num, bank); 765 value = (SWR_HSTOP_MAX_VAL << 4) | SWR_HSTART_MIN_VAL; 766 ret = ctrl->reg_write(ctrl, reg, value); 767 } 768 769 if (ret) 770 goto err; 771 772 if (pcfg->bp_mode != SWR_INVALID_PARAM) { 773 reg = SWRM_DP_BLOCK_CTRL3_BANK(params->port_num, bank); 774 ret = ctrl->reg_write(ctrl, reg, pcfg->bp_mode); 775 } 776 777 err: 778 return ret; 779 } 780 781 static int qcom_swrm_port_enable(struct sdw_bus *bus, 782 struct sdw_enable_ch *enable_ch, 783 unsigned int bank) 784 { 785 u32 reg = SWRM_DP_PORT_CTRL_BANK(enable_ch->port_num, bank); 786 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 787 u32 val; 788 789 ctrl->reg_read(ctrl, reg, &val); 790 791 if (enable_ch->enable) 792 val |= (enable_ch->ch_mask << SWRM_DP_PORT_CTRL_EN_CHAN_SHFT); 793 else 794 val &= ~(0xff << SWRM_DP_PORT_CTRL_EN_CHAN_SHFT); 795 796 return ctrl->reg_write(ctrl, reg, val); 797 } 798 799 static const struct sdw_master_port_ops qcom_swrm_port_ops = { 800 .dpn_set_port_params = qcom_swrm_port_params, 801 .dpn_set_port_transport_params = qcom_swrm_transport_params, 802 .dpn_port_enable_ch = qcom_swrm_port_enable, 803 }; 804 805 static const struct sdw_master_ops qcom_swrm_ops = { 806 .xfer_msg = qcom_swrm_xfer_msg, 807 .pre_bank_switch = qcom_swrm_pre_bank_switch, 808 }; 809 810 static int qcom_swrm_compute_params(struct sdw_bus *bus) 811 { 812 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 813 struct sdw_master_runtime *m_rt; 814 struct sdw_slave_runtime *s_rt; 815 struct sdw_port_runtime *p_rt; 816 struct qcom_swrm_port_config *pcfg; 817 struct sdw_slave *slave; 818 unsigned int m_port; 819 int i = 1; 820 821 list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) { 822 list_for_each_entry(p_rt, &m_rt->port_list, port_node) { 823 pcfg = &ctrl->pconfig[p_rt->num]; 824 p_rt->transport_params.port_num = p_rt->num; 825 if (pcfg->word_length != SWR_INVALID_PARAM) { 826 sdw_fill_port_params(&p_rt->port_params, 827 p_rt->num, pcfg->word_length + 1, 828 SDW_PORT_FLOW_MODE_ISOCH, 829 SDW_PORT_DATA_MODE_NORMAL); 830 } 831 832 } 833 834 list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { 835 slave = s_rt->slave; 836 list_for_each_entry(p_rt, &s_rt->port_list, port_node) { 837 m_port = slave->m_port_map[p_rt->num]; 838 /* port config starts at offset 0 so -1 from actual port number */ 839 if (m_port) 840 pcfg = &ctrl->pconfig[m_port]; 841 else 842 pcfg = &ctrl->pconfig[i]; 843 p_rt->transport_params.port_num = p_rt->num; 844 p_rt->transport_params.sample_interval = 845 pcfg->si + 1; 846 p_rt->transport_params.offset1 = pcfg->off1; 847 p_rt->transport_params.offset2 = pcfg->off2; 848 p_rt->transport_params.blk_pkg_mode = pcfg->bp_mode; 849 p_rt->transport_params.blk_grp_ctrl = pcfg->blk_group_count; 850 851 p_rt->transport_params.hstart = pcfg->hstart; 852 p_rt->transport_params.hstop = pcfg->hstop; 853 p_rt->transport_params.lane_ctrl = pcfg->lane_control; 854 if (pcfg->word_length != SWR_INVALID_PARAM) { 855 sdw_fill_port_params(&p_rt->port_params, 856 p_rt->num, 857 pcfg->word_length + 1, 858 SDW_PORT_FLOW_MODE_ISOCH, 859 SDW_PORT_DATA_MODE_NORMAL); 860 } 861 i++; 862 } 863 } 864 } 865 866 return 0; 867 } 868 869 static u32 qcom_swrm_freq_tbl[MAX_FREQ_NUM] = { 870 DEFAULT_CLK_FREQ, 871 }; 872 873 static void qcom_swrm_stream_free_ports(struct qcom_swrm_ctrl *ctrl, 874 struct sdw_stream_runtime *stream) 875 { 876 struct sdw_master_runtime *m_rt; 877 struct sdw_port_runtime *p_rt; 878 unsigned long *port_mask; 879 880 mutex_lock(&ctrl->port_lock); 881 882 list_for_each_entry(m_rt, &stream->master_list, stream_node) { 883 if (m_rt->direction == SDW_DATA_DIR_RX) 884 port_mask = &ctrl->dout_port_mask; 885 else 886 port_mask = &ctrl->din_port_mask; 887 888 list_for_each_entry(p_rt, &m_rt->port_list, port_node) 889 clear_bit(p_rt->num, port_mask); 890 } 891 892 mutex_unlock(&ctrl->port_lock); 893 } 894 895 static int qcom_swrm_stream_alloc_ports(struct qcom_swrm_ctrl *ctrl, 896 struct sdw_stream_runtime *stream, 897 struct snd_pcm_hw_params *params, 898 int direction) 899 { 900 struct sdw_port_config pconfig[QCOM_SDW_MAX_PORTS]; 901 struct sdw_stream_config sconfig; 902 struct sdw_master_runtime *m_rt; 903 struct sdw_slave_runtime *s_rt; 904 struct sdw_port_runtime *p_rt; 905 struct sdw_slave *slave; 906 unsigned long *port_mask; 907 int i, maxport, pn, nports = 0, ret = 0; 908 unsigned int m_port; 909 910 mutex_lock(&ctrl->port_lock); 911 list_for_each_entry(m_rt, &stream->master_list, stream_node) { 912 if (m_rt->direction == SDW_DATA_DIR_RX) { 913 maxport = ctrl->num_dout_ports; 914 port_mask = &ctrl->dout_port_mask; 915 } else { 916 maxport = ctrl->num_din_ports; 917 port_mask = &ctrl->din_port_mask; 918 } 919 920 list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { 921 slave = s_rt->slave; 922 list_for_each_entry(p_rt, &s_rt->port_list, port_node) { 923 m_port = slave->m_port_map[p_rt->num]; 924 /* Port numbers start from 1 - 14*/ 925 if (m_port) 926 pn = m_port; 927 else 928 pn = find_first_zero_bit(port_mask, maxport); 929 930 if (pn > maxport) { 931 dev_err(ctrl->dev, "All ports busy\n"); 932 ret = -EBUSY; 933 goto err; 934 } 935 set_bit(pn, port_mask); 936 pconfig[nports].num = pn; 937 pconfig[nports].ch_mask = p_rt->ch_mask; 938 nports++; 939 } 940 } 941 } 942 943 if (direction == SNDRV_PCM_STREAM_CAPTURE) 944 sconfig.direction = SDW_DATA_DIR_TX; 945 else 946 sconfig.direction = SDW_DATA_DIR_RX; 947 948 /* hw parameters wil be ignored as we only support PDM */ 949 sconfig.ch_count = 1; 950 sconfig.frame_rate = params_rate(params); 951 sconfig.type = stream->type; 952 sconfig.bps = 1; 953 sdw_stream_add_master(&ctrl->bus, &sconfig, pconfig, 954 nports, stream); 955 err: 956 if (ret) { 957 for (i = 0; i < nports; i++) 958 clear_bit(pconfig[i].num, port_mask); 959 } 960 961 mutex_unlock(&ctrl->port_lock); 962 963 return ret; 964 } 965 966 static int qcom_swrm_hw_params(struct snd_pcm_substream *substream, 967 struct snd_pcm_hw_params *params, 968 struct snd_soc_dai *dai) 969 { 970 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev); 971 struct sdw_stream_runtime *sruntime = ctrl->sruntime[dai->id]; 972 int ret; 973 974 ret = qcom_swrm_stream_alloc_ports(ctrl, sruntime, params, 975 substream->stream); 976 if (ret) 977 qcom_swrm_stream_free_ports(ctrl, sruntime); 978 979 return ret; 980 } 981 982 static int qcom_swrm_hw_free(struct snd_pcm_substream *substream, 983 struct snd_soc_dai *dai) 984 { 985 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev); 986 struct sdw_stream_runtime *sruntime = ctrl->sruntime[dai->id]; 987 988 qcom_swrm_stream_free_ports(ctrl, sruntime); 989 sdw_stream_remove_master(&ctrl->bus, sruntime); 990 991 return 0; 992 } 993 994 static int qcom_swrm_set_sdw_stream(struct snd_soc_dai *dai, 995 void *stream, int direction) 996 { 997 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev); 998 999 ctrl->sruntime[dai->id] = stream; 1000 1001 return 0; 1002 } 1003 1004 static void *qcom_swrm_get_sdw_stream(struct snd_soc_dai *dai, int direction) 1005 { 1006 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev); 1007 1008 return ctrl->sruntime[dai->id]; 1009 } 1010 1011 static int qcom_swrm_startup(struct snd_pcm_substream *substream, 1012 struct snd_soc_dai *dai) 1013 { 1014 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev); 1015 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1016 struct sdw_stream_runtime *sruntime; 1017 struct snd_soc_dai *codec_dai; 1018 int ret, i; 1019 1020 sruntime = sdw_alloc_stream(dai->name); 1021 if (!sruntime) 1022 return -ENOMEM; 1023 1024 ctrl->sruntime[dai->id] = sruntime; 1025 1026 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1027 ret = snd_soc_dai_set_stream(codec_dai, sruntime, 1028 substream->stream); 1029 if (ret < 0 && ret != -ENOTSUPP) { 1030 dev_err(dai->dev, "Failed to set sdw stream on %s\n", 1031 codec_dai->name); 1032 sdw_release_stream(sruntime); 1033 return ret; 1034 } 1035 } 1036 1037 return 0; 1038 } 1039 1040 static void qcom_swrm_shutdown(struct snd_pcm_substream *substream, 1041 struct snd_soc_dai *dai) 1042 { 1043 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev); 1044 1045 sdw_release_stream(ctrl->sruntime[dai->id]); 1046 ctrl->sruntime[dai->id] = NULL; 1047 } 1048 1049 static const struct snd_soc_dai_ops qcom_swrm_pdm_dai_ops = { 1050 .hw_params = qcom_swrm_hw_params, 1051 .hw_free = qcom_swrm_hw_free, 1052 .startup = qcom_swrm_startup, 1053 .shutdown = qcom_swrm_shutdown, 1054 .set_stream = qcom_swrm_set_sdw_stream, 1055 .get_stream = qcom_swrm_get_sdw_stream, 1056 }; 1057 1058 static const struct snd_soc_component_driver qcom_swrm_dai_component = { 1059 .name = "soundwire", 1060 }; 1061 1062 static int qcom_swrm_register_dais(struct qcom_swrm_ctrl *ctrl) 1063 { 1064 int num_dais = ctrl->num_dout_ports + ctrl->num_din_ports; 1065 struct snd_soc_dai_driver *dais; 1066 struct snd_soc_pcm_stream *stream; 1067 struct device *dev = ctrl->dev; 1068 int i; 1069 1070 /* PDM dais are only tested for now */ 1071 dais = devm_kcalloc(dev, num_dais, sizeof(*dais), GFP_KERNEL); 1072 if (!dais) 1073 return -ENOMEM; 1074 1075 for (i = 0; i < num_dais; i++) { 1076 dais[i].name = devm_kasprintf(dev, GFP_KERNEL, "SDW Pin%d", i); 1077 if (!dais[i].name) 1078 return -ENOMEM; 1079 1080 if (i < ctrl->num_dout_ports) 1081 stream = &dais[i].playback; 1082 else 1083 stream = &dais[i].capture; 1084 1085 stream->channels_min = 1; 1086 stream->channels_max = 1; 1087 stream->rates = SNDRV_PCM_RATE_48000; 1088 stream->formats = SNDRV_PCM_FMTBIT_S16_LE; 1089 1090 dais[i].ops = &qcom_swrm_pdm_dai_ops; 1091 dais[i].id = i; 1092 } 1093 1094 return devm_snd_soc_register_component(ctrl->dev, 1095 &qcom_swrm_dai_component, 1096 dais, num_dais); 1097 } 1098 1099 static int qcom_swrm_get_port_config(struct qcom_swrm_ctrl *ctrl) 1100 { 1101 struct device_node *np = ctrl->dev->of_node; 1102 u8 off1[QCOM_SDW_MAX_PORTS]; 1103 u8 off2[QCOM_SDW_MAX_PORTS]; 1104 u8 si[QCOM_SDW_MAX_PORTS]; 1105 u8 bp_mode[QCOM_SDW_MAX_PORTS] = { 0, }; 1106 u8 hstart[QCOM_SDW_MAX_PORTS]; 1107 u8 hstop[QCOM_SDW_MAX_PORTS]; 1108 u8 word_length[QCOM_SDW_MAX_PORTS]; 1109 u8 blk_group_count[QCOM_SDW_MAX_PORTS]; 1110 u8 lane_control[QCOM_SDW_MAX_PORTS]; 1111 int i, ret, nports, val; 1112 1113 ctrl->reg_read(ctrl, SWRM_COMP_PARAMS, &val); 1114 1115 ctrl->num_dout_ports = FIELD_GET(SWRM_COMP_PARAMS_DOUT_PORTS_MASK, val); 1116 ctrl->num_din_ports = FIELD_GET(SWRM_COMP_PARAMS_DIN_PORTS_MASK, val); 1117 1118 ret = of_property_read_u32(np, "qcom,din-ports", &val); 1119 if (ret) 1120 return ret; 1121 1122 if (val > ctrl->num_din_ports) 1123 return -EINVAL; 1124 1125 ctrl->num_din_ports = val; 1126 1127 ret = of_property_read_u32(np, "qcom,dout-ports", &val); 1128 if (ret) 1129 return ret; 1130 1131 if (val > ctrl->num_dout_ports) 1132 return -EINVAL; 1133 1134 ctrl->num_dout_ports = val; 1135 1136 nports = ctrl->num_dout_ports + ctrl->num_din_ports; 1137 /* Valid port numbers are from 1-14, so mask out port 0 explicitly */ 1138 set_bit(0, &ctrl->dout_port_mask); 1139 set_bit(0, &ctrl->din_port_mask); 1140 1141 ret = of_property_read_u8_array(np, "qcom,ports-offset1", 1142 off1, nports); 1143 if (ret) 1144 return ret; 1145 1146 ret = of_property_read_u8_array(np, "qcom,ports-offset2", 1147 off2, nports); 1148 if (ret) 1149 return ret; 1150 1151 ret = of_property_read_u8_array(np, "qcom,ports-sinterval-low", 1152 si, nports); 1153 if (ret) 1154 return ret; 1155 1156 ret = of_property_read_u8_array(np, "qcom,ports-block-pack-mode", 1157 bp_mode, nports); 1158 if (ret) { 1159 if (ctrl->version <= 0x01030000) 1160 memset(bp_mode, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS); 1161 else 1162 return ret; 1163 } 1164 1165 memset(hstart, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS); 1166 of_property_read_u8_array(np, "qcom,ports-hstart", hstart, nports); 1167 1168 memset(hstop, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS); 1169 of_property_read_u8_array(np, "qcom,ports-hstop", hstop, nports); 1170 1171 memset(word_length, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS); 1172 of_property_read_u8_array(np, "qcom,ports-word-length", word_length, nports); 1173 1174 memset(blk_group_count, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS); 1175 of_property_read_u8_array(np, "qcom,ports-block-group-count", blk_group_count, nports); 1176 1177 memset(lane_control, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS); 1178 of_property_read_u8_array(np, "qcom,ports-lane-control", lane_control, nports); 1179 1180 for (i = 0; i < nports; i++) { 1181 /* Valid port number range is from 1-14 */ 1182 ctrl->pconfig[i + 1].si = si[i]; 1183 ctrl->pconfig[i + 1].off1 = off1[i]; 1184 ctrl->pconfig[i + 1].off2 = off2[i]; 1185 ctrl->pconfig[i + 1].bp_mode = bp_mode[i]; 1186 ctrl->pconfig[i + 1].hstart = hstart[i]; 1187 ctrl->pconfig[i + 1].hstop = hstop[i]; 1188 ctrl->pconfig[i + 1].word_length = word_length[i]; 1189 ctrl->pconfig[i + 1].blk_group_count = blk_group_count[i]; 1190 ctrl->pconfig[i + 1].lane_control = lane_control[i]; 1191 } 1192 1193 return 0; 1194 } 1195 1196 #ifdef CONFIG_DEBUG_FS 1197 static int swrm_reg_show(struct seq_file *s_file, void *data) 1198 { 1199 struct qcom_swrm_ctrl *swrm = s_file->private; 1200 int reg, reg_val; 1201 1202 for (reg = 0; reg <= SWR_MSTR_MAX_REG_ADDR; reg += 4) { 1203 swrm->reg_read(swrm, reg, ®_val); 1204 seq_printf(s_file, "0x%.3x: 0x%.2x\n", reg, reg_val); 1205 } 1206 1207 return 0; 1208 } 1209 DEFINE_SHOW_ATTRIBUTE(swrm_reg); 1210 #endif 1211 1212 static int qcom_swrm_probe(struct platform_device *pdev) 1213 { 1214 struct device *dev = &pdev->dev; 1215 struct sdw_master_prop *prop; 1216 struct sdw_bus_params *params; 1217 struct qcom_swrm_ctrl *ctrl; 1218 const struct qcom_swrm_data *data; 1219 int ret; 1220 u32 val; 1221 1222 ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); 1223 if (!ctrl) 1224 return -ENOMEM; 1225 1226 data = of_device_get_match_data(dev); 1227 ctrl->rows_index = sdw_find_row_index(data->default_rows); 1228 ctrl->cols_index = sdw_find_col_index(data->default_cols); 1229 #if IS_REACHABLE(CONFIG_SLIMBUS) 1230 if (dev->parent->bus == &slimbus_bus) { 1231 #else 1232 if (false) { 1233 #endif 1234 ctrl->reg_read = qcom_swrm_ahb_reg_read; 1235 ctrl->reg_write = qcom_swrm_ahb_reg_write; 1236 ctrl->regmap = dev_get_regmap(dev->parent, NULL); 1237 if (!ctrl->regmap) 1238 return -EINVAL; 1239 } else { 1240 ctrl->reg_read = qcom_swrm_cpu_reg_read; 1241 ctrl->reg_write = qcom_swrm_cpu_reg_write; 1242 ctrl->mmio = devm_platform_ioremap_resource(pdev, 0); 1243 if (IS_ERR(ctrl->mmio)) 1244 return PTR_ERR(ctrl->mmio); 1245 } 1246 1247 ctrl->irq = of_irq_get(dev->of_node, 0); 1248 if (ctrl->irq < 0) { 1249 ret = ctrl->irq; 1250 goto err_init; 1251 } 1252 1253 ctrl->hclk = devm_clk_get(dev, "iface"); 1254 if (IS_ERR(ctrl->hclk)) { 1255 ret = PTR_ERR(ctrl->hclk); 1256 goto err_init; 1257 } 1258 1259 clk_prepare_enable(ctrl->hclk); 1260 1261 ctrl->dev = dev; 1262 dev_set_drvdata(&pdev->dev, ctrl); 1263 mutex_init(&ctrl->port_lock); 1264 init_completion(&ctrl->broadcast); 1265 init_completion(&ctrl->enumeration); 1266 1267 ctrl->bus.ops = &qcom_swrm_ops; 1268 ctrl->bus.port_ops = &qcom_swrm_port_ops; 1269 ctrl->bus.compute_params = &qcom_swrm_compute_params; 1270 1271 ret = qcom_swrm_get_port_config(ctrl); 1272 if (ret) 1273 goto err_clk; 1274 1275 params = &ctrl->bus.params; 1276 params->max_dr_freq = DEFAULT_CLK_FREQ; 1277 params->curr_dr_freq = DEFAULT_CLK_FREQ; 1278 params->col = data->default_cols; 1279 params->row = data->default_rows; 1280 ctrl->reg_read(ctrl, SWRM_MCP_STATUS, &val); 1281 params->curr_bank = val & SWRM_MCP_STATUS_BANK_NUM_MASK; 1282 params->next_bank = !params->curr_bank; 1283 1284 prop = &ctrl->bus.prop; 1285 prop->max_clk_freq = DEFAULT_CLK_FREQ; 1286 prop->num_clk_gears = 0; 1287 prop->num_clk_freq = MAX_FREQ_NUM; 1288 prop->clk_freq = &qcom_swrm_freq_tbl[0]; 1289 prop->default_col = data->default_cols; 1290 prop->default_row = data->default_rows; 1291 1292 ctrl->reg_read(ctrl, SWRM_COMP_HW_VERSION, &ctrl->version); 1293 1294 ret = devm_request_threaded_irq(dev, ctrl->irq, NULL, 1295 qcom_swrm_irq_handler, 1296 IRQF_TRIGGER_RISING | 1297 IRQF_ONESHOT, 1298 "soundwire", ctrl); 1299 if (ret) { 1300 dev_err(dev, "Failed to request soundwire irq\n"); 1301 goto err_clk; 1302 } 1303 1304 ret = sdw_bus_master_add(&ctrl->bus, dev, dev->fwnode); 1305 if (ret) { 1306 dev_err(dev, "Failed to register Soundwire controller (%d)\n", 1307 ret); 1308 goto err_clk; 1309 } 1310 1311 qcom_swrm_init(ctrl); 1312 wait_for_completion_timeout(&ctrl->enumeration, 1313 msecs_to_jiffies(TIMEOUT_MS)); 1314 ret = qcom_swrm_register_dais(ctrl); 1315 if (ret) 1316 goto err_master_add; 1317 1318 dev_info(dev, "Qualcomm Soundwire controller v%x.%x.%x Registered\n", 1319 (ctrl->version >> 24) & 0xff, (ctrl->version >> 16) & 0xff, 1320 ctrl->version & 0xffff); 1321 1322 #ifdef CONFIG_DEBUG_FS 1323 ctrl->debugfs = debugfs_create_dir("qualcomm-sdw", ctrl->bus.debugfs); 1324 debugfs_create_file("qualcomm-registers", 0400, ctrl->debugfs, ctrl, 1325 &swrm_reg_fops); 1326 #endif 1327 1328 return 0; 1329 1330 err_master_add: 1331 sdw_bus_master_delete(&ctrl->bus); 1332 err_clk: 1333 clk_disable_unprepare(ctrl->hclk); 1334 err_init: 1335 return ret; 1336 } 1337 1338 static int qcom_swrm_remove(struct platform_device *pdev) 1339 { 1340 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(&pdev->dev); 1341 1342 sdw_bus_master_delete(&ctrl->bus); 1343 clk_disable_unprepare(ctrl->hclk); 1344 1345 return 0; 1346 } 1347 1348 static const struct of_device_id qcom_swrm_of_match[] = { 1349 { .compatible = "qcom,soundwire-v1.3.0", .data = &swrm_v1_3_data }, 1350 { .compatible = "qcom,soundwire-v1.5.1", .data = &swrm_v1_5_data }, 1351 {/* sentinel */}, 1352 }; 1353 1354 MODULE_DEVICE_TABLE(of, qcom_swrm_of_match); 1355 1356 static struct platform_driver qcom_swrm_driver = { 1357 .probe = &qcom_swrm_probe, 1358 .remove = &qcom_swrm_remove, 1359 .driver = { 1360 .name = "qcom-soundwire", 1361 .of_match_table = qcom_swrm_of_match, 1362 } 1363 }; 1364 module_platform_driver(qcom_swrm_driver); 1365 1366 MODULE_DESCRIPTION("Qualcomm soundwire driver"); 1367 MODULE_LICENSE("GPL v2"); 1368