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