| 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | // |
| 3 | // Copyright (c) 2023, 2024 Pengutronix, |
| 4 | // Marc Kleine-Budde <kernel@pengutronix.de> |
| 5 | // |
| 6 | // Based on: |
| 7 | // |
| 8 | // Rockchip CANFD driver |
| 9 | // |
| 10 | // Copyright (c) 2020 Rockchip Electronics Co. Ltd. |
| 11 | // |
| 12 | |
| 13 | #include <linux/delay.h> |
| 14 | #include <linux/errno.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/interrupt.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/of.h> |
| 20 | #include <linux/of_device.h> |
| 21 | #include <linux/platform_device.h> |
| 22 | #include <linux/pm_runtime.h> |
| 23 | #include <linux/string.h> |
| 24 | |
| 25 | #include "rockchip_canfd.h" |
| 26 | |
| 27 | static const struct rkcanfd_devtype_data rkcanfd_devtype_data_rk3568v2 = { |
| 28 | .model = RKCANFD_MODEL_RK3568V2, |
| 29 | .quirks = RKCANFD_QUIRK_RK3568_ERRATUM_1 | RKCANFD_QUIRK_RK3568_ERRATUM_2 | |
| 30 | RKCANFD_QUIRK_RK3568_ERRATUM_3 | RKCANFD_QUIRK_RK3568_ERRATUM_4 | |
| 31 | RKCANFD_QUIRK_RK3568_ERRATUM_5 | RKCANFD_QUIRK_RK3568_ERRATUM_6 | |
| 32 | RKCANFD_QUIRK_RK3568_ERRATUM_7 | RKCANFD_QUIRK_RK3568_ERRATUM_8 | |
| 33 | RKCANFD_QUIRK_RK3568_ERRATUM_9 | RKCANFD_QUIRK_RK3568_ERRATUM_10 | |
| 34 | RKCANFD_QUIRK_RK3568_ERRATUM_11 | RKCANFD_QUIRK_RK3568_ERRATUM_12 | |
| 35 | RKCANFD_QUIRK_CANFD_BROKEN, |
| 36 | }; |
| 37 | |
| 38 | /* The rk3568 CAN-FD errata sheet as of Tue 07 Nov 2023 11:25:31 +08:00 |
| 39 | * states that only the rk3568v2 is affected by erratum 5, but tests |
| 40 | * with the rk3568v2 and rk3568v3 show that the RX_FIFO_CNT is |
| 41 | * sometimes too high. In contrast to the errata sheet mark rk3568v3 |
| 42 | * as effected by erratum 5, too. |
| 43 | */ |
| 44 | static const struct rkcanfd_devtype_data rkcanfd_devtype_data_rk3568v3 = { |
| 45 | .model = RKCANFD_MODEL_RK3568V3, |
| 46 | .quirks = RKCANFD_QUIRK_RK3568_ERRATUM_1 | RKCANFD_QUIRK_RK3568_ERRATUM_2 | |
| 47 | RKCANFD_QUIRK_RK3568_ERRATUM_5 | RKCANFD_QUIRK_RK3568_ERRATUM_7 | |
| 48 | RKCANFD_QUIRK_RK3568_ERRATUM_8 | RKCANFD_QUIRK_RK3568_ERRATUM_10 | |
| 49 | RKCANFD_QUIRK_RK3568_ERRATUM_11 | RKCANFD_QUIRK_RK3568_ERRATUM_12 | |
| 50 | RKCANFD_QUIRK_CANFD_BROKEN, |
| 51 | }; |
| 52 | |
| 53 | static const char *__rkcanfd_get_model_str(enum rkcanfd_model model) |
| 54 | { |
| 55 | switch (model) { |
| 56 | case RKCANFD_MODEL_RK3568V2: |
| 57 | return "rk3568v2" ; |
| 58 | case RKCANFD_MODEL_RK3568V3: |
| 59 | return "rk3568v3" ; |
| 60 | } |
| 61 | |
| 62 | return "<unknown>" ; |
| 63 | } |
| 64 | |
| 65 | static inline const char * |
| 66 | rkcanfd_get_model_str(const struct rkcanfd_priv *priv) |
| 67 | { |
| 68 | return __rkcanfd_get_model_str(model: priv->devtype_data.model); |
| 69 | } |
| 70 | |
| 71 | /* Note: |
| 72 | * |
| 73 | * The formula to calculate the CAN System Clock is: |
| 74 | * |
| 75 | * Tsclk = 2 x Tclk x (brp + 1) |
| 76 | * |
| 77 | * Double the data sheet's brp_min, brp_max and brp_inc values (both |
| 78 | * for the arbitration and data bit timing) to take the "2 x" into |
| 79 | * account. |
| 80 | */ |
| 81 | static const struct can_bittiming_const rkcanfd_bittiming_const = { |
| 82 | .name = DEVICE_NAME, |
| 83 | .tseg1_min = 1, |
| 84 | .tseg1_max = 256, |
| 85 | .tseg2_min = 1, |
| 86 | .tseg2_max = 128, |
| 87 | .sjw_max = 128, |
| 88 | .brp_min = 2, /* value from data sheet x2 */ |
| 89 | .brp_max = 512, /* value from data sheet x2 */ |
| 90 | .brp_inc = 2, /* value from data sheet x2 */ |
| 91 | }; |
| 92 | |
| 93 | static const struct can_bittiming_const rkcanfd_data_bittiming_const = { |
| 94 | .name = DEVICE_NAME, |
| 95 | .tseg1_min = 1, |
| 96 | .tseg1_max = 32, |
| 97 | .tseg2_min = 1, |
| 98 | .tseg2_max = 16, |
| 99 | .sjw_max = 16, |
| 100 | .brp_min = 2, /* value from data sheet x2 */ |
| 101 | .brp_max = 512, /* value from data sheet x2 */ |
| 102 | .brp_inc = 2, /* value from data sheet x2 */ |
| 103 | }; |
| 104 | |
| 105 | static void rkcanfd_chip_set_reset_mode(const struct rkcanfd_priv *priv) |
| 106 | { |
| 107 | reset_control_assert(rstc: priv->reset); |
| 108 | udelay(usec: 2); |
| 109 | reset_control_deassert(rstc: priv->reset); |
| 110 | |
| 111 | rkcanfd_write(priv, RKCANFD_REG_MODE, val: 0x0); |
| 112 | } |
| 113 | |
| 114 | static void rkcanfd_chip_set_work_mode(const struct rkcanfd_priv *priv) |
| 115 | { |
| 116 | rkcanfd_write(priv, RKCANFD_REG_MODE, val: priv->reg_mode_default); |
| 117 | } |
| 118 | |
| 119 | static int rkcanfd_set_bittiming(struct rkcanfd_priv *priv) |
| 120 | { |
| 121 | const struct can_bittiming *dbt = &priv->can.fd.data_bittiming; |
| 122 | const struct can_bittiming *bt = &priv->can.bittiming; |
| 123 | u32 reg_nbt, reg_dbt, reg_tdc; |
| 124 | u32 tdco; |
| 125 | |
| 126 | reg_nbt = FIELD_PREP(RKCANFD_REG_FD_NOMINAL_BITTIMING_SJW, |
| 127 | bt->sjw - 1) | |
| 128 | FIELD_PREP(RKCANFD_REG_FD_NOMINAL_BITTIMING_BRP, |
| 129 | (bt->brp / 2) - 1) | |
| 130 | FIELD_PREP(RKCANFD_REG_FD_NOMINAL_BITTIMING_TSEG2, |
| 131 | bt->phase_seg2 - 1) | |
| 132 | FIELD_PREP(RKCANFD_REG_FD_NOMINAL_BITTIMING_TSEG1, |
| 133 | bt->prop_seg + bt->phase_seg1 - 1); |
| 134 | |
| 135 | rkcanfd_write(priv, RKCANFD_REG_FD_NOMINAL_BITTIMING, val: reg_nbt); |
| 136 | |
| 137 | if (!(priv->can.ctrlmode & CAN_CTRLMODE_FD)) |
| 138 | return 0; |
| 139 | |
| 140 | reg_dbt = FIELD_PREP(RKCANFD_REG_FD_DATA_BITTIMING_SJW, |
| 141 | dbt->sjw - 1) | |
| 142 | FIELD_PREP(RKCANFD_REG_FD_DATA_BITTIMING_BRP, |
| 143 | (dbt->brp / 2) - 1) | |
| 144 | FIELD_PREP(RKCANFD_REG_FD_DATA_BITTIMING_TSEG2, |
| 145 | dbt->phase_seg2 - 1) | |
| 146 | FIELD_PREP(RKCANFD_REG_FD_DATA_BITTIMING_TSEG1, |
| 147 | dbt->prop_seg + dbt->phase_seg1 - 1); |
| 148 | |
| 149 | rkcanfd_write(priv, RKCANFD_REG_FD_DATA_BITTIMING, val: reg_dbt); |
| 150 | |
| 151 | tdco = (priv->can.clock.freq / dbt->bitrate) * 2 / 3; |
| 152 | tdco = min(tdco, FIELD_MAX(RKCANFD_REG_TRANSMIT_DELAY_COMPENSATION_TDC_OFFSET)); |
| 153 | |
| 154 | reg_tdc = FIELD_PREP(RKCANFD_REG_TRANSMIT_DELAY_COMPENSATION_TDC_OFFSET, tdco) | |
| 155 | RKCANFD_REG_TRANSMIT_DELAY_COMPENSATION_TDC_ENABLE; |
| 156 | rkcanfd_write(priv, RKCANFD_REG_TRANSMIT_DELAY_COMPENSATION, |
| 157 | val: reg_tdc); |
| 158 | |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | static void rkcanfd_get_berr_counter_corrected(struct rkcanfd_priv *priv, |
| 163 | struct can_berr_counter *bec) |
| 164 | { |
| 165 | struct can_berr_counter bec_raw; |
| 166 | u32 reg_state; |
| 167 | |
| 168 | bec->rxerr = rkcanfd_read(priv, RKCANFD_REG_RXERRORCNT); |
| 169 | bec->txerr = rkcanfd_read(priv, RKCANFD_REG_TXERRORCNT); |
| 170 | bec_raw = *bec; |
| 171 | |
| 172 | /* Tests show that sometimes both CAN bus error counters read |
| 173 | * 0x0, even if the controller is in warning mode |
| 174 | * (RKCANFD_REG_STATE_ERROR_WARNING_STATE in RKCANFD_REG_STATE |
| 175 | * set). |
| 176 | * |
| 177 | * In case both error counters read 0x0, use the struct |
| 178 | * priv->bec, otherwise save the read value to priv->bec. |
| 179 | * |
| 180 | * rkcanfd_handle_rx_int_one() handles the decrementing of |
| 181 | * priv->bec.rxerr for successfully RX'ed CAN frames. |
| 182 | * |
| 183 | * Luckily the controller doesn't decrement the RX CAN bus |
| 184 | * error counter in hardware for self received TX'ed CAN |
| 185 | * frames (RKCANFD_REG_MODE_RXSTX_MODE), so RXSTX doesn't |
| 186 | * interfere with proper RX CAN bus error counters. |
| 187 | * |
| 188 | * rkcanfd_handle_tx_done_one() handles the decrementing of |
| 189 | * priv->bec.txerr for successfully TX'ed CAN frames. |
| 190 | */ |
| 191 | if (!bec->rxerr && !bec->txerr) |
| 192 | *bec = priv->bec; |
| 193 | else |
| 194 | priv->bec = *bec; |
| 195 | |
| 196 | reg_state = rkcanfd_read(priv, RKCANFD_REG_STATE); |
| 197 | netdev_vdbg(priv->ndev, |
| 198 | "%s: Raw/Cor: txerr=%3u/%3u rxerr=%3u/%3u Bus Off=%u Warning=%u\n" , |
| 199 | __func__, |
| 200 | bec_raw.txerr, bec->txerr, bec_raw.rxerr, bec->rxerr, |
| 201 | !!(reg_state & RKCANFD_REG_STATE_BUS_OFF_STATE), |
| 202 | !!(reg_state & RKCANFD_REG_STATE_ERROR_WARNING_STATE)); |
| 203 | } |
| 204 | |
| 205 | static int rkcanfd_get_berr_counter(const struct net_device *ndev, |
| 206 | struct can_berr_counter *bec) |
| 207 | { |
| 208 | struct rkcanfd_priv *priv = netdev_priv(dev: ndev); |
| 209 | int err; |
| 210 | |
| 211 | err = pm_runtime_resume_and_get(dev: ndev->dev.parent); |
| 212 | if (err) |
| 213 | return err; |
| 214 | |
| 215 | rkcanfd_get_berr_counter_corrected(priv, bec); |
| 216 | |
| 217 | pm_runtime_put(dev: ndev->dev.parent); |
| 218 | |
| 219 | return 0; |
| 220 | } |
| 221 | |
| 222 | static void rkcanfd_chip_interrupts_enable(const struct rkcanfd_priv *priv) |
| 223 | { |
| 224 | rkcanfd_write(priv, RKCANFD_REG_INT_MASK, val: priv->reg_int_mask_default); |
| 225 | |
| 226 | netdev_dbg(priv->ndev, "%s: reg_int_mask=0x%08x\n" , __func__, |
| 227 | rkcanfd_read(priv, RKCANFD_REG_INT_MASK)); |
| 228 | } |
| 229 | |
| 230 | static void rkcanfd_chip_interrupts_disable(const struct rkcanfd_priv *priv) |
| 231 | { |
| 232 | rkcanfd_write(priv, RKCANFD_REG_INT_MASK, RKCANFD_REG_INT_ALL); |
| 233 | } |
| 234 | |
| 235 | static void rkcanfd_chip_fifo_setup(struct rkcanfd_priv *priv) |
| 236 | { |
| 237 | u32 reg; |
| 238 | |
| 239 | /* RX FIFO */ |
| 240 | reg = rkcanfd_read(priv, RKCANFD_REG_RX_FIFO_CTRL); |
| 241 | reg |= RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_ENABLE; |
| 242 | rkcanfd_write(priv, RKCANFD_REG_RX_FIFO_CTRL, val: reg); |
| 243 | |
| 244 | WRITE_ONCE(priv->tx_head, 0); |
| 245 | WRITE_ONCE(priv->tx_tail, 0); |
| 246 | netdev_reset_queue(dev_queue: priv->ndev); |
| 247 | } |
| 248 | |
| 249 | static void rkcanfd_chip_start(struct rkcanfd_priv *priv) |
| 250 | { |
| 251 | u32 reg; |
| 252 | |
| 253 | rkcanfd_chip_set_reset_mode(priv); |
| 254 | |
| 255 | /* Receiving Filter: accept all */ |
| 256 | rkcanfd_write(priv, RKCANFD_REG_IDCODE, val: 0x0); |
| 257 | rkcanfd_write(priv, RKCANFD_REG_IDMASK, RKCANFD_REG_IDCODE_EXTENDED_FRAME_ID); |
| 258 | |
| 259 | /* enable: |
| 260 | * - CAN_FD: enable CAN-FD |
| 261 | * - AUTO_RETX_MODE: auto retransmission on TX error |
| 262 | * - COVER_MODE: RX-FIFO overwrite mode, do not send OVERLOAD frames |
| 263 | * - RXSTX_MODE: Receive Self Transmit data mode |
| 264 | * - WORK_MODE: transition from reset to working mode |
| 265 | */ |
| 266 | reg = rkcanfd_read(priv, RKCANFD_REG_MODE); |
| 267 | priv->reg_mode_default = reg | |
| 268 | RKCANFD_REG_MODE_CAN_FD_MODE_ENABLE | |
| 269 | RKCANFD_REG_MODE_AUTO_RETX_MODE | |
| 270 | RKCANFD_REG_MODE_COVER_MODE | |
| 271 | RKCANFD_REG_MODE_RXSTX_MODE | |
| 272 | RKCANFD_REG_MODE_WORK_MODE; |
| 273 | |
| 274 | if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) |
| 275 | priv->reg_mode_default |= RKCANFD_REG_MODE_LBACK_MODE | |
| 276 | RKCANFD_REG_MODE_SILENT_MODE | |
| 277 | RKCANFD_REG_MODE_SELF_TEST; |
| 278 | |
| 279 | /* mask, i.e. ignore: |
| 280 | * - TIMESTAMP_COUNTER_OVERFLOW_INT - timestamp counter overflow interrupt |
| 281 | * - TX_ARBIT_FAIL_INT - TX arbitration fail interrupt |
| 282 | * - OVERLOAD_INT - CAN bus overload interrupt |
| 283 | * - TX_FINISH_INT - Transmit finish interrupt |
| 284 | */ |
| 285 | priv->reg_int_mask_default = |
| 286 | RKCANFD_REG_INT_TIMESTAMP_COUNTER_OVERFLOW_INT | |
| 287 | RKCANFD_REG_INT_TX_ARBIT_FAIL_INT | |
| 288 | RKCANFD_REG_INT_OVERLOAD_INT | |
| 289 | RKCANFD_REG_INT_TX_FINISH_INT; |
| 290 | |
| 291 | /* Do not mask the bus error interrupt if the bus error |
| 292 | * reporting is requested. |
| 293 | */ |
| 294 | if (!(priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)) |
| 295 | priv->reg_int_mask_default |= RKCANFD_REG_INT_ERROR_INT; |
| 296 | |
| 297 | memset(&priv->bec, 0x0, sizeof(priv->bec)); |
| 298 | |
| 299 | rkcanfd_chip_fifo_setup(priv); |
| 300 | rkcanfd_timestamp_init(priv); |
| 301 | rkcanfd_timestamp_start(priv); |
| 302 | |
| 303 | rkcanfd_set_bittiming(priv); |
| 304 | |
| 305 | rkcanfd_chip_interrupts_disable(priv); |
| 306 | rkcanfd_chip_set_work_mode(priv); |
| 307 | |
| 308 | priv->can.state = CAN_STATE_ERROR_ACTIVE; |
| 309 | |
| 310 | netdev_dbg(priv->ndev, "%s: reg_mode=0x%08x\n" , __func__, |
| 311 | rkcanfd_read(priv, RKCANFD_REG_MODE)); |
| 312 | } |
| 313 | |
| 314 | static void __rkcanfd_chip_stop(struct rkcanfd_priv *priv, const enum can_state state) |
| 315 | { |
| 316 | priv->can.state = state; |
| 317 | |
| 318 | rkcanfd_chip_set_reset_mode(priv); |
| 319 | rkcanfd_chip_interrupts_disable(priv); |
| 320 | } |
| 321 | |
| 322 | static void rkcanfd_chip_stop(struct rkcanfd_priv *priv, const enum can_state state) |
| 323 | { |
| 324 | priv->can.state = state; |
| 325 | |
| 326 | rkcanfd_timestamp_stop(priv); |
| 327 | __rkcanfd_chip_stop(priv, state); |
| 328 | } |
| 329 | |
| 330 | static void rkcanfd_chip_stop_sync(struct rkcanfd_priv *priv, const enum can_state state) |
| 331 | { |
| 332 | priv->can.state = state; |
| 333 | |
| 334 | rkcanfd_timestamp_stop_sync(priv); |
| 335 | __rkcanfd_chip_stop(priv, state); |
| 336 | } |
| 337 | |
| 338 | static int rkcanfd_set_mode(struct net_device *ndev, |
| 339 | enum can_mode mode) |
| 340 | { |
| 341 | struct rkcanfd_priv *priv = netdev_priv(dev: ndev); |
| 342 | |
| 343 | switch (mode) { |
| 344 | case CAN_MODE_START: |
| 345 | rkcanfd_chip_start(priv); |
| 346 | rkcanfd_chip_interrupts_enable(priv); |
| 347 | netif_wake_queue(dev: ndev); |
| 348 | break; |
| 349 | |
| 350 | default: |
| 351 | return -EOPNOTSUPP; |
| 352 | } |
| 353 | |
| 354 | return 0; |
| 355 | } |
| 356 | |
| 357 | static struct sk_buff * |
| 358 | rkcanfd_alloc_can_err_skb(struct rkcanfd_priv *priv, |
| 359 | struct can_frame **cf, u32 *timestamp) |
| 360 | { |
| 361 | struct sk_buff *skb; |
| 362 | |
| 363 | *timestamp = rkcanfd_get_timestamp(priv); |
| 364 | |
| 365 | skb = alloc_can_err_skb(dev: priv->ndev, cf); |
| 366 | if (skb) |
| 367 | rkcanfd_skb_set_timestamp(priv, skb, timestamp: *timestamp); |
| 368 | |
| 369 | return skb; |
| 370 | } |
| 371 | |
| 372 | static const char *rkcanfd_get_error_type_str(unsigned int type) |
| 373 | { |
| 374 | switch (type) { |
| 375 | case RKCANFD_REG_ERROR_CODE_TYPE_BIT: |
| 376 | return "Bit" ; |
| 377 | case RKCANFD_REG_ERROR_CODE_TYPE_STUFF: |
| 378 | return "Stuff" ; |
| 379 | case RKCANFD_REG_ERROR_CODE_TYPE_FORM: |
| 380 | return "Form" ; |
| 381 | case RKCANFD_REG_ERROR_CODE_TYPE_ACK: |
| 382 | return "ACK" ; |
| 383 | case RKCANFD_REG_ERROR_CODE_TYPE_CRC: |
| 384 | return "CRC" ; |
| 385 | } |
| 386 | |
| 387 | return "<unknown>" ; |
| 388 | } |
| 389 | |
| 390 | #define RKCAN_ERROR_CODE(reg_ec, code) \ |
| 391 | ((reg_ec) & RKCANFD_REG_ERROR_CODE_##code ? __stringify(code) " " : "") |
| 392 | |
| 393 | static void |
| 394 | rkcanfd_handle_error_int_reg_ec(struct rkcanfd_priv *priv, struct can_frame *cf, |
| 395 | const u32 reg_ec) |
| 396 | { |
| 397 | struct net_device_stats *stats = &priv->ndev->stats; |
| 398 | unsigned int type; |
| 399 | u32 reg_state, reg_cmd; |
| 400 | |
| 401 | type = FIELD_GET(RKCANFD_REG_ERROR_CODE_TYPE, reg_ec); |
| 402 | reg_cmd = rkcanfd_read(priv, RKCANFD_REG_CMD); |
| 403 | reg_state = rkcanfd_read(priv, RKCANFD_REG_STATE); |
| 404 | |
| 405 | netdev_dbg(priv->ndev, "%s Error in %s %s Phase: %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s(0x%08x) CMD=%u RX=%u TX=%u Error-Warning=%u Bus-Off=%u\n" , |
| 406 | rkcanfd_get_error_type_str(type), |
| 407 | reg_ec & RKCANFD_REG_ERROR_CODE_DIRECTION_RX ? "RX" : "TX" , |
| 408 | reg_ec & RKCANFD_REG_ERROR_CODE_PHASE ? "Data" : "Arbitration" , |
| 409 | RKCAN_ERROR_CODE(reg_ec, TX_OVERLOAD), |
| 410 | RKCAN_ERROR_CODE(reg_ec, TX_ERROR), |
| 411 | RKCAN_ERROR_CODE(reg_ec, TX_ACK), |
| 412 | RKCAN_ERROR_CODE(reg_ec, TX_ACK_EOF), |
| 413 | RKCAN_ERROR_CODE(reg_ec, TX_CRC), |
| 414 | RKCAN_ERROR_CODE(reg_ec, TX_STUFF_COUNT), |
| 415 | RKCAN_ERROR_CODE(reg_ec, TX_DATA), |
| 416 | RKCAN_ERROR_CODE(reg_ec, TX_SOF_DLC), |
| 417 | RKCAN_ERROR_CODE(reg_ec, TX_IDLE), |
| 418 | RKCAN_ERROR_CODE(reg_ec, RX_BUF_INT), |
| 419 | RKCAN_ERROR_CODE(reg_ec, RX_SPACE), |
| 420 | RKCAN_ERROR_CODE(reg_ec, RX_EOF), |
| 421 | RKCAN_ERROR_CODE(reg_ec, RX_ACK_LIM), |
| 422 | RKCAN_ERROR_CODE(reg_ec, RX_ACK), |
| 423 | RKCAN_ERROR_CODE(reg_ec, RX_CRC_LIM), |
| 424 | RKCAN_ERROR_CODE(reg_ec, RX_CRC), |
| 425 | RKCAN_ERROR_CODE(reg_ec, RX_STUFF_COUNT), |
| 426 | RKCAN_ERROR_CODE(reg_ec, RX_DATA), |
| 427 | RKCAN_ERROR_CODE(reg_ec, RX_DLC), |
| 428 | RKCAN_ERROR_CODE(reg_ec, RX_BRS_ESI), |
| 429 | RKCAN_ERROR_CODE(reg_ec, RX_RES), |
| 430 | RKCAN_ERROR_CODE(reg_ec, RX_FDF), |
| 431 | RKCAN_ERROR_CODE(reg_ec, RX_ID2_RTR), |
| 432 | RKCAN_ERROR_CODE(reg_ec, RX_SOF_IDE), |
| 433 | RKCAN_ERROR_CODE(reg_ec, RX_IDLE), |
| 434 | reg_ec, reg_cmd, |
| 435 | !!(reg_state & RKCANFD_REG_STATE_RX_PERIOD), |
| 436 | !!(reg_state & RKCANFD_REG_STATE_TX_PERIOD), |
| 437 | !!(reg_state & RKCANFD_REG_STATE_ERROR_WARNING_STATE), |
| 438 | !!(reg_state & RKCANFD_REG_STATE_BUS_OFF_STATE)); |
| 439 | |
| 440 | priv->can.can_stats.bus_error++; |
| 441 | |
| 442 | if (reg_ec & RKCANFD_REG_ERROR_CODE_DIRECTION_RX) |
| 443 | stats->rx_errors++; |
| 444 | else |
| 445 | stats->tx_errors++; |
| 446 | |
| 447 | if (!cf) |
| 448 | return; |
| 449 | |
| 450 | if (reg_ec & RKCANFD_REG_ERROR_CODE_DIRECTION_RX) { |
| 451 | if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_SOF_IDE) |
| 452 | cf->data[3] = CAN_ERR_PROT_LOC_SOF; |
| 453 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_ID2_RTR) |
| 454 | cf->data[3] = CAN_ERR_PROT_LOC_RTR; |
| 455 | /* RKCANFD_REG_ERROR_CODE_RX_FDF */ |
| 456 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_RES) |
| 457 | cf->data[3] = CAN_ERR_PROT_LOC_RES0; |
| 458 | /* RKCANFD_REG_ERROR_CODE_RX_BRS_ESI */ |
| 459 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_DLC) |
| 460 | cf->data[3] = CAN_ERR_PROT_LOC_DLC; |
| 461 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_DATA) |
| 462 | cf->data[3] = CAN_ERR_PROT_LOC_DATA; |
| 463 | /* RKCANFD_REG_ERROR_CODE_RX_STUFF_COUNT */ |
| 464 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_CRC) |
| 465 | cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ; |
| 466 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_CRC_LIM) |
| 467 | cf->data[3] = CAN_ERR_PROT_LOC_ACK_DEL; |
| 468 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_ACK) |
| 469 | cf->data[3] = CAN_ERR_PROT_LOC_ACK; |
| 470 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_ACK_LIM) |
| 471 | cf->data[3] = CAN_ERR_PROT_LOC_ACK_DEL; |
| 472 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_EOF) |
| 473 | cf->data[3] = CAN_ERR_PROT_LOC_EOF; |
| 474 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_SPACE) |
| 475 | cf->data[3] = CAN_ERR_PROT_LOC_EOF; |
| 476 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_BUF_INT) |
| 477 | cf->data[3] = CAN_ERR_PROT_LOC_INTERM; |
| 478 | } else { |
| 479 | cf->data[2] |= CAN_ERR_PROT_TX; |
| 480 | |
| 481 | if (reg_ec & RKCANFD_REG_ERROR_CODE_TX_SOF_DLC) |
| 482 | cf->data[3] = CAN_ERR_PROT_LOC_SOF; |
| 483 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_TX_DATA) |
| 484 | cf->data[3] = CAN_ERR_PROT_LOC_DATA; |
| 485 | /* RKCANFD_REG_ERROR_CODE_TX_STUFF_COUNT */ |
| 486 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_TX_CRC) |
| 487 | cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ; |
| 488 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_TX_ACK_EOF) |
| 489 | cf->data[3] = CAN_ERR_PROT_LOC_ACK_DEL; |
| 490 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_TX_ACK) |
| 491 | cf->data[3] = CAN_ERR_PROT_LOC_ACK; |
| 492 | /* RKCANFD_REG_ERROR_CODE_TX_ERROR */ |
| 493 | else if (reg_ec & RKCANFD_REG_ERROR_CODE_TX_OVERLOAD) |
| 494 | cf->data[2] |= CAN_ERR_PROT_OVERLOAD; |
| 495 | } |
| 496 | |
| 497 | switch (reg_ec & RKCANFD_REG_ERROR_CODE_TYPE) { |
| 498 | case FIELD_PREP_CONST(RKCANFD_REG_ERROR_CODE_TYPE, |
| 499 | RKCANFD_REG_ERROR_CODE_TYPE_BIT): |
| 500 | |
| 501 | cf->data[2] |= CAN_ERR_PROT_BIT; |
| 502 | break; |
| 503 | case FIELD_PREP_CONST(RKCANFD_REG_ERROR_CODE_TYPE, |
| 504 | RKCANFD_REG_ERROR_CODE_TYPE_STUFF): |
| 505 | cf->data[2] |= CAN_ERR_PROT_STUFF; |
| 506 | break; |
| 507 | case FIELD_PREP_CONST(RKCANFD_REG_ERROR_CODE_TYPE, |
| 508 | RKCANFD_REG_ERROR_CODE_TYPE_FORM): |
| 509 | cf->data[2] |= CAN_ERR_PROT_FORM; |
| 510 | break; |
| 511 | case FIELD_PREP_CONST(RKCANFD_REG_ERROR_CODE_TYPE, |
| 512 | RKCANFD_REG_ERROR_CODE_TYPE_ACK): |
| 513 | cf->can_id |= CAN_ERR_ACK; |
| 514 | break; |
| 515 | case FIELD_PREP_CONST(RKCANFD_REG_ERROR_CODE_TYPE, |
| 516 | RKCANFD_REG_ERROR_CODE_TYPE_CRC): |
| 517 | cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ; |
| 518 | break; |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | static int rkcanfd_handle_error_int(struct rkcanfd_priv *priv) |
| 523 | { |
| 524 | struct net_device_stats *stats = &priv->ndev->stats; |
| 525 | struct can_frame *cf = NULL; |
| 526 | u32 reg_ec, timestamp; |
| 527 | struct sk_buff *skb; |
| 528 | int err; |
| 529 | |
| 530 | reg_ec = rkcanfd_read(priv, RKCANFD_REG_ERROR_CODE); |
| 531 | |
| 532 | if (!reg_ec) |
| 533 | return 0; |
| 534 | |
| 535 | if (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING) { |
| 536 | skb = rkcanfd_alloc_can_err_skb(priv, cf: &cf, timestamp: ×tamp); |
| 537 | if (cf) { |
| 538 | struct can_berr_counter bec; |
| 539 | |
| 540 | rkcanfd_get_berr_counter_corrected(priv, bec: &bec); |
| 541 | cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR | CAN_ERR_CNT; |
| 542 | cf->data[6] = bec.txerr; |
| 543 | cf->data[7] = bec.rxerr; |
| 544 | } |
| 545 | } |
| 546 | |
| 547 | rkcanfd_handle_error_int_reg_ec(priv, cf, reg_ec); |
| 548 | |
| 549 | if (!cf) |
| 550 | return 0; |
| 551 | |
| 552 | err = can_rx_offload_queue_timestamp(offload: &priv->offload, skb, timestamp); |
| 553 | if (err) |
| 554 | stats->rx_fifo_errors++; |
| 555 | |
| 556 | return 0; |
| 557 | } |
| 558 | |
| 559 | static int rkcanfd_handle_state_error_int(struct rkcanfd_priv *priv) |
| 560 | { |
| 561 | struct net_device_stats *stats = &priv->ndev->stats; |
| 562 | enum can_state new_state, rx_state, tx_state; |
| 563 | struct net_device *ndev = priv->ndev; |
| 564 | struct can_berr_counter bec; |
| 565 | struct can_frame *cf = NULL; |
| 566 | struct sk_buff *skb; |
| 567 | u32 timestamp; |
| 568 | int err; |
| 569 | |
| 570 | rkcanfd_get_berr_counter_corrected(priv, bec: &bec); |
| 571 | can_state_get_by_berr_counter(dev: ndev, bec: &bec, tx_state: &tx_state, rx_state: &rx_state); |
| 572 | |
| 573 | new_state = max(tx_state, rx_state); |
| 574 | if (new_state == priv->can.state) |
| 575 | return 0; |
| 576 | |
| 577 | /* The skb allocation might fail, but can_change_state() |
| 578 | * handles cf == NULL. |
| 579 | */ |
| 580 | skb = rkcanfd_alloc_can_err_skb(priv, cf: &cf, timestamp: ×tamp); |
| 581 | can_change_state(dev: ndev, cf, tx_state, rx_state); |
| 582 | |
| 583 | if (new_state == CAN_STATE_BUS_OFF) { |
| 584 | rkcanfd_chip_stop(priv, state: CAN_STATE_BUS_OFF); |
| 585 | can_bus_off(dev: ndev); |
| 586 | } |
| 587 | |
| 588 | if (!skb) |
| 589 | return 0; |
| 590 | |
| 591 | if (new_state != CAN_STATE_BUS_OFF) { |
| 592 | cf->can_id |= CAN_ERR_CNT; |
| 593 | cf->data[6] = bec.txerr; |
| 594 | cf->data[7] = bec.rxerr; |
| 595 | } |
| 596 | |
| 597 | err = can_rx_offload_queue_timestamp(offload: &priv->offload, skb, timestamp); |
| 598 | if (err) |
| 599 | stats->rx_fifo_errors++; |
| 600 | |
| 601 | return 0; |
| 602 | } |
| 603 | |
| 604 | static int |
| 605 | rkcanfd_handle_rx_fifo_overflow_int(struct rkcanfd_priv *priv) |
| 606 | { |
| 607 | struct net_device_stats *stats = &priv->ndev->stats; |
| 608 | struct can_berr_counter bec; |
| 609 | struct can_frame *cf = NULL; |
| 610 | struct sk_buff *skb; |
| 611 | u32 timestamp; |
| 612 | int err; |
| 613 | |
| 614 | stats->rx_over_errors++; |
| 615 | stats->rx_errors++; |
| 616 | |
| 617 | netdev_dbg(priv->ndev, "RX-FIFO overflow\n" ); |
| 618 | |
| 619 | skb = rkcanfd_alloc_can_err_skb(priv, cf: &cf, timestamp: ×tamp); |
| 620 | if (!skb) |
| 621 | return 0; |
| 622 | |
| 623 | rkcanfd_get_berr_counter_corrected(priv, bec: &bec); |
| 624 | |
| 625 | cf->can_id |= CAN_ERR_CRTL | CAN_ERR_CNT; |
| 626 | cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW; |
| 627 | cf->data[6] = bec.txerr; |
| 628 | cf->data[7] = bec.rxerr; |
| 629 | |
| 630 | err = can_rx_offload_queue_timestamp(offload: &priv->offload, skb, timestamp); |
| 631 | if (err) |
| 632 | stats->rx_fifo_errors++; |
| 633 | |
| 634 | return 0; |
| 635 | } |
| 636 | |
| 637 | #define rkcanfd_handle(priv, irq, ...) \ |
| 638 | ({ \ |
| 639 | struct rkcanfd_priv *_priv = (priv); \ |
| 640 | int err; \ |
| 641 | \ |
| 642 | err = rkcanfd_handle_##irq(_priv, ## __VA_ARGS__); \ |
| 643 | if (err) \ |
| 644 | netdev_err(_priv->ndev, \ |
| 645 | "IRQ handler rkcanfd_handle_%s() returned error: %pe\n", \ |
| 646 | __stringify(irq), ERR_PTR(err)); \ |
| 647 | err; \ |
| 648 | }) |
| 649 | |
| 650 | static irqreturn_t rkcanfd_irq(int irq, void *dev_id) |
| 651 | { |
| 652 | struct rkcanfd_priv *priv = dev_id; |
| 653 | u32 reg_int_unmasked, reg_int; |
| 654 | |
| 655 | reg_int_unmasked = rkcanfd_read(priv, RKCANFD_REG_INT); |
| 656 | reg_int = reg_int_unmasked & ~priv->reg_int_mask_default; |
| 657 | |
| 658 | if (!reg_int) |
| 659 | return IRQ_NONE; |
| 660 | |
| 661 | /* First ACK then handle, to avoid lost-IRQ race condition on |
| 662 | * fast re-occurring interrupts. |
| 663 | */ |
| 664 | rkcanfd_write(priv, RKCANFD_REG_INT, val: reg_int); |
| 665 | |
| 666 | if (reg_int & RKCANFD_REG_INT_RX_FINISH_INT) |
| 667 | rkcanfd_handle(priv, rx_int); |
| 668 | |
| 669 | if (reg_int & RKCANFD_REG_INT_ERROR_INT) |
| 670 | rkcanfd_handle(priv, error_int); |
| 671 | |
| 672 | if (reg_int & (RKCANFD_REG_INT_BUS_OFF_INT | |
| 673 | RKCANFD_REG_INT_PASSIVE_ERROR_INT | |
| 674 | RKCANFD_REG_INT_ERROR_WARNING_INT) || |
| 675 | priv->can.state > CAN_STATE_ERROR_ACTIVE) |
| 676 | rkcanfd_handle(priv, state_error_int); |
| 677 | |
| 678 | if (reg_int & RKCANFD_REG_INT_RX_FIFO_OVERFLOW_INT) |
| 679 | rkcanfd_handle(priv, rx_fifo_overflow_int); |
| 680 | |
| 681 | if (reg_int & ~(RKCANFD_REG_INT_ALL_ERROR | |
| 682 | RKCANFD_REG_INT_RX_FIFO_OVERFLOW_INT | |
| 683 | RKCANFD_REG_INT_RX_FINISH_INT)) |
| 684 | netdev_err(dev: priv->ndev, format: "%s: int=0x%08x\n" , __func__, reg_int); |
| 685 | |
| 686 | if (reg_int & RKCANFD_REG_INT_WAKEUP_INT) |
| 687 | netdev_info(dev: priv->ndev, format: "%s: WAKEUP_INT\n" , __func__); |
| 688 | |
| 689 | if (reg_int & RKCANFD_REG_INT_TXE_FIFO_FULL_INT) |
| 690 | netdev_info(dev: priv->ndev, format: "%s: TXE_FIFO_FULL_INT\n" , __func__); |
| 691 | |
| 692 | if (reg_int & RKCANFD_REG_INT_TXE_FIFO_OV_INT) |
| 693 | netdev_info(dev: priv->ndev, format: "%s: TXE_FIFO_OV_INT\n" , __func__); |
| 694 | |
| 695 | if (reg_int & RKCANFD_REG_INT_BUS_OFF_RECOVERY_INT) |
| 696 | netdev_info(dev: priv->ndev, format: "%s: BUS_OFF_RECOVERY_INT\n" , __func__); |
| 697 | |
| 698 | if (reg_int & RKCANFD_REG_INT_RX_FIFO_FULL_INT) |
| 699 | netdev_info(dev: priv->ndev, format: "%s: RX_FIFO_FULL_INT\n" , __func__); |
| 700 | |
| 701 | if (reg_int & RKCANFD_REG_INT_OVERLOAD_INT) |
| 702 | netdev_info(dev: priv->ndev, format: "%s: OVERLOAD_INT\n" , __func__); |
| 703 | |
| 704 | can_rx_offload_irq_finish(offload: &priv->offload); |
| 705 | |
| 706 | return IRQ_HANDLED; |
| 707 | } |
| 708 | |
| 709 | static int rkcanfd_open(struct net_device *ndev) |
| 710 | { |
| 711 | struct rkcanfd_priv *priv = netdev_priv(dev: ndev); |
| 712 | int err; |
| 713 | |
| 714 | err = open_candev(dev: ndev); |
| 715 | if (err) |
| 716 | return err; |
| 717 | |
| 718 | err = pm_runtime_resume_and_get(dev: ndev->dev.parent); |
| 719 | if (err) |
| 720 | goto out_close_candev; |
| 721 | |
| 722 | rkcanfd_chip_start(priv); |
| 723 | can_rx_offload_enable(offload: &priv->offload); |
| 724 | |
| 725 | err = request_irq(irq: ndev->irq, handler: rkcanfd_irq, IRQF_SHARED, name: ndev->name, dev: priv); |
| 726 | if (err) |
| 727 | goto out_rkcanfd_chip_stop; |
| 728 | |
| 729 | rkcanfd_chip_interrupts_enable(priv); |
| 730 | |
| 731 | netif_start_queue(dev: ndev); |
| 732 | |
| 733 | return 0; |
| 734 | |
| 735 | out_rkcanfd_chip_stop: |
| 736 | rkcanfd_chip_stop_sync(priv, state: CAN_STATE_STOPPED); |
| 737 | pm_runtime_put(dev: ndev->dev.parent); |
| 738 | out_close_candev: |
| 739 | close_candev(dev: ndev); |
| 740 | return err; |
| 741 | } |
| 742 | |
| 743 | static int rkcanfd_stop(struct net_device *ndev) |
| 744 | { |
| 745 | struct rkcanfd_priv *priv = netdev_priv(dev: ndev); |
| 746 | |
| 747 | netif_stop_queue(dev: ndev); |
| 748 | |
| 749 | rkcanfd_chip_interrupts_disable(priv); |
| 750 | free_irq(ndev->irq, priv); |
| 751 | can_rx_offload_disable(offload: &priv->offload); |
| 752 | rkcanfd_chip_stop_sync(priv, state: CAN_STATE_STOPPED); |
| 753 | close_candev(dev: ndev); |
| 754 | |
| 755 | pm_runtime_put(dev: ndev->dev.parent); |
| 756 | |
| 757 | return 0; |
| 758 | } |
| 759 | |
| 760 | static const struct net_device_ops rkcanfd_netdev_ops = { |
| 761 | .ndo_open = rkcanfd_open, |
| 762 | .ndo_stop = rkcanfd_stop, |
| 763 | .ndo_start_xmit = rkcanfd_start_xmit, |
| 764 | }; |
| 765 | |
| 766 | static int __maybe_unused rkcanfd_runtime_suspend(struct device *dev) |
| 767 | { |
| 768 | struct rkcanfd_priv *priv = dev_get_drvdata(dev); |
| 769 | |
| 770 | clk_bulk_disable_unprepare(num_clks: priv->clks_num, clks: priv->clks); |
| 771 | |
| 772 | return 0; |
| 773 | } |
| 774 | |
| 775 | static int __maybe_unused rkcanfd_runtime_resume(struct device *dev) |
| 776 | { |
| 777 | struct rkcanfd_priv *priv = dev_get_drvdata(dev); |
| 778 | |
| 779 | return clk_bulk_prepare_enable(num_clks: priv->clks_num, clks: priv->clks); |
| 780 | } |
| 781 | |
| 782 | static void rkcanfd_register_done(const struct rkcanfd_priv *priv) |
| 783 | { |
| 784 | u32 dev_id; |
| 785 | |
| 786 | dev_id = rkcanfd_read(priv, RKCANFD_REG_RTL_VERSION); |
| 787 | |
| 788 | netdev_info(dev: priv->ndev, |
| 789 | format: "Rockchip-CANFD %s rev%lu.%lu (errata 0x%04x) found\n" , |
| 790 | rkcanfd_get_model_str(priv), |
| 791 | FIELD_GET(RKCANFD_REG_RTL_VERSION_MAJOR, dev_id), |
| 792 | FIELD_GET(RKCANFD_REG_RTL_VERSION_MINOR, dev_id), |
| 793 | priv->devtype_data.quirks); |
| 794 | |
| 795 | if (priv->devtype_data.quirks & RKCANFD_QUIRK_RK3568_ERRATUM_5 && |
| 796 | priv->can.clock.freq < RKCANFD_ERRATUM_5_SYSCLOCK_HZ_MIN) |
| 797 | netdev_info(dev: priv->ndev, |
| 798 | format: "Erratum 5: CAN clock frequency (%luMHz) lower than known good (%luMHz), expect degraded performance\n" , |
| 799 | priv->can.clock.freq / MEGA, |
| 800 | RKCANFD_ERRATUM_5_SYSCLOCK_HZ_MIN / MEGA); |
| 801 | } |
| 802 | |
| 803 | static int rkcanfd_register(struct rkcanfd_priv *priv) |
| 804 | { |
| 805 | struct net_device *ndev = priv->ndev; |
| 806 | int err; |
| 807 | |
| 808 | pm_runtime_enable(dev: ndev->dev.parent); |
| 809 | |
| 810 | err = pm_runtime_resume_and_get(dev: ndev->dev.parent); |
| 811 | if (err) |
| 812 | goto out_pm_runtime_disable; |
| 813 | |
| 814 | rkcanfd_ethtool_init(priv); |
| 815 | |
| 816 | err = register_candev(dev: ndev); |
| 817 | if (err) |
| 818 | goto out_pm_runtime_put_sync; |
| 819 | |
| 820 | rkcanfd_register_done(priv); |
| 821 | |
| 822 | pm_runtime_put(dev: ndev->dev.parent); |
| 823 | |
| 824 | return 0; |
| 825 | |
| 826 | out_pm_runtime_put_sync: |
| 827 | pm_runtime_put_sync(dev: ndev->dev.parent); |
| 828 | out_pm_runtime_disable: |
| 829 | pm_runtime_disable(dev: ndev->dev.parent); |
| 830 | |
| 831 | return err; |
| 832 | } |
| 833 | |
| 834 | static inline void rkcanfd_unregister(struct rkcanfd_priv *priv) |
| 835 | { |
| 836 | struct net_device *ndev = priv->ndev; |
| 837 | |
| 838 | unregister_candev(dev: ndev); |
| 839 | pm_runtime_disable(dev: ndev->dev.parent); |
| 840 | } |
| 841 | |
| 842 | static const struct of_device_id rkcanfd_of_match[] = { |
| 843 | { |
| 844 | .compatible = "rockchip,rk3568v2-canfd" , |
| 845 | .data = &rkcanfd_devtype_data_rk3568v2, |
| 846 | }, { |
| 847 | .compatible = "rockchip,rk3568v3-canfd" , |
| 848 | .data = &rkcanfd_devtype_data_rk3568v3, |
| 849 | }, { |
| 850 | /* sentinel */ |
| 851 | }, |
| 852 | }; |
| 853 | MODULE_DEVICE_TABLE(of, rkcanfd_of_match); |
| 854 | |
| 855 | static int rkcanfd_probe(struct platform_device *pdev) |
| 856 | { |
| 857 | struct rkcanfd_priv *priv; |
| 858 | struct net_device *ndev; |
| 859 | const void *match; |
| 860 | int err; |
| 861 | |
| 862 | ndev = alloc_candev(sizeof(struct rkcanfd_priv), RKCANFD_TXFIFO_DEPTH); |
| 863 | if (!ndev) |
| 864 | return -ENOMEM; |
| 865 | |
| 866 | priv = netdev_priv(dev: ndev); |
| 867 | |
| 868 | ndev->irq = platform_get_irq(pdev, 0); |
| 869 | if (ndev->irq < 0) { |
| 870 | err = ndev->irq; |
| 871 | goto out_free_candev; |
| 872 | } |
| 873 | |
| 874 | priv->clks_num = devm_clk_bulk_get_all(dev: &pdev->dev, clks: &priv->clks); |
| 875 | if (priv->clks_num < 0) { |
| 876 | err = priv->clks_num; |
| 877 | goto out_free_candev; |
| 878 | } |
| 879 | |
| 880 | priv->regs = devm_platform_ioremap_resource(pdev, index: 0); |
| 881 | if (IS_ERR(ptr: priv->regs)) { |
| 882 | err = PTR_ERR(ptr: priv->regs); |
| 883 | goto out_free_candev; |
| 884 | } |
| 885 | |
| 886 | priv->reset = devm_reset_control_array_get_exclusive(dev: &pdev->dev); |
| 887 | if (IS_ERR(ptr: priv->reset)) { |
| 888 | err = dev_err_probe(dev: &pdev->dev, err: PTR_ERR(ptr: priv->reset), |
| 889 | fmt: "Failed to get reset line\n" ); |
| 890 | goto out_free_candev; |
| 891 | } |
| 892 | |
| 893 | SET_NETDEV_DEV(ndev, &pdev->dev); |
| 894 | |
| 895 | ndev->netdev_ops = &rkcanfd_netdev_ops; |
| 896 | ndev->flags |= IFF_ECHO; |
| 897 | |
| 898 | platform_set_drvdata(pdev, data: priv); |
| 899 | priv->can.clock.freq = clk_get_rate(clk: priv->clks[0].clk); |
| 900 | priv->can.bittiming_const = &rkcanfd_bittiming_const; |
| 901 | priv->can.fd.data_bittiming_const = &rkcanfd_data_bittiming_const; |
| 902 | priv->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK | |
| 903 | CAN_CTRLMODE_BERR_REPORTING; |
| 904 | priv->can.do_set_mode = rkcanfd_set_mode; |
| 905 | priv->can.do_get_berr_counter = rkcanfd_get_berr_counter; |
| 906 | priv->ndev = ndev; |
| 907 | |
| 908 | match = device_get_match_data(dev: &pdev->dev); |
| 909 | if (match) { |
| 910 | priv->devtype_data = *(struct rkcanfd_devtype_data *)match; |
| 911 | if (!(priv->devtype_data.quirks & RKCANFD_QUIRK_CANFD_BROKEN)) |
| 912 | priv->can.ctrlmode_supported |= CAN_CTRLMODE_FD; |
| 913 | } |
| 914 | |
| 915 | err = can_rx_offload_add_manual(dev: ndev, offload: &priv->offload, |
| 916 | RKCANFD_NAPI_WEIGHT); |
| 917 | if (err) |
| 918 | goto out_free_candev; |
| 919 | |
| 920 | err = rkcanfd_register(priv); |
| 921 | if (err) |
| 922 | goto out_can_rx_offload_del; |
| 923 | |
| 924 | return 0; |
| 925 | |
| 926 | out_can_rx_offload_del: |
| 927 | can_rx_offload_del(offload: &priv->offload); |
| 928 | out_free_candev: |
| 929 | free_candev(dev: ndev); |
| 930 | |
| 931 | return err; |
| 932 | } |
| 933 | |
| 934 | static void rkcanfd_remove(struct platform_device *pdev) |
| 935 | { |
| 936 | struct rkcanfd_priv *priv = platform_get_drvdata(pdev); |
| 937 | struct net_device *ndev = priv->ndev; |
| 938 | |
| 939 | rkcanfd_unregister(priv); |
| 940 | can_rx_offload_del(offload: &priv->offload); |
| 941 | free_candev(dev: ndev); |
| 942 | } |
| 943 | |
| 944 | static const struct dev_pm_ops rkcanfd_pm_ops = { |
| 945 | SET_RUNTIME_PM_OPS(rkcanfd_runtime_suspend, |
| 946 | rkcanfd_runtime_resume, NULL) |
| 947 | }; |
| 948 | |
| 949 | static struct platform_driver rkcanfd_driver = { |
| 950 | .driver = { |
| 951 | .name = DEVICE_NAME, |
| 952 | .pm = &rkcanfd_pm_ops, |
| 953 | .of_match_table = rkcanfd_of_match, |
| 954 | }, |
| 955 | .probe = rkcanfd_probe, |
| 956 | .remove = rkcanfd_remove, |
| 957 | }; |
| 958 | module_platform_driver(rkcanfd_driver); |
| 959 | |
| 960 | MODULE_AUTHOR("Marc Kleine-Budde <mkl@pengutronix.de>" ); |
| 961 | MODULE_DESCRIPTION("Rockchip CAN-FD Driver" ); |
| 962 | MODULE_LICENSE("GPL" ); |
| 963 | |