Aishwarya Prasad | b4dab66 | 2020-01-31 15:28:41 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2015-2020, The Linux Foundation. All rights reserved. |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/interrupt.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/errno.h> |
| 16 | #include <linux/netdevice.h> |
| 17 | #include <linux/workqueue.h> |
| 18 | #include <linux/spi/spi.h> |
| 19 | #include <linux/can.h> |
| 20 | #include <linux/can/dev.h> |
| 21 | #include <linux/can/error.h> |
| 22 | #include <linux/of.h> |
| 23 | #include <linux/of_device.h> |
| 24 | #include <linux/of_gpio.h> |
| 25 | #include <linux/uaccess.h> |
| 26 | #include <linux/pm.h> |
| 27 | #include <asm/div64.h> |
| 28 | |
| 29 | #define DEBUG_QTI_CAN 0 |
| 30 | #if DEBUG_QTI_CAN == 1 |
| 31 | #define LOGDI(...) dev_info(&priv_data->spidev->dev, __VA_ARGS__) |
| 32 | #define LOGNI(...) netdev_info(netdev, __VA_ARGS__) |
| 33 | #else |
| 34 | #define LOGDI(...) dev_dbg(&priv_data->spidev->dev, __VA_ARGS__) |
| 35 | #define LOGNI(...) netdev_dbg(netdev, __VA_ARGS__) |
| 36 | #endif |
| 37 | #define LOGDE(...) dev_err(&priv_data->spidev->dev, __VA_ARGS__) |
| 38 | #define LOGNE(...) netdev_err(netdev, __VA_ARGS__) |
| 39 | |
| 40 | #define MAX_TX_BUFFERS 1 |
| 41 | #define XFER_BUFFER_SIZE 64 |
| 42 | #define RX_ASSEMBLY_BUFFER_SIZE 128 |
| 43 | #define QTI_CAN_FW_QUERY_RETRY_COUNT 3 |
| 44 | #define DRIVER_MODE_RAW_FRAMES 0 |
| 45 | #define DRIVER_MODE_PROPERTIES 1 |
| 46 | #define DRIVER_MODE_AMB 2 |
| 47 | #define QUERY_FIRMWARE_TIMEOUT_MS 300 |
| 48 | #define EUPGRADE 140 |
| 49 | |
| 50 | struct qti_can { |
| 51 | struct net_device **netdev; |
| 52 | struct spi_device *spidev; |
| 53 | struct mutex spi_lock; /* SPI device lock */ |
| 54 | struct workqueue_struct *tx_wq; |
| 55 | char *tx_buf, *rx_buf; |
| 56 | int xfer_length; |
| 57 | atomic_t msg_seq; |
| 58 | char *assembly_buffer; |
| 59 | u8 assembly_buffer_size; |
| 60 | atomic_t netif_queue_stop; |
| 61 | struct completion response_completion; |
| 62 | int wait_cmd; |
| 63 | int cmd_result; |
| 64 | int driver_mode; |
| 65 | int clk_freq_mhz; |
| 66 | int max_can_channels; |
| 67 | int bits_per_word; |
| 68 | int reset_delay_msec; |
| 69 | int reset; |
| 70 | bool support_can_fd; |
| 71 | bool can_fw_cmd_timeout_req; |
| 72 | u32 rem_all_buffering_timeout_ms; |
| 73 | u32 can_fw_cmd_timeout_ms; |
| 74 | s64 time_diff; |
| 75 | }; |
| 76 | |
| 77 | struct qti_can_netdev_privdata { |
| 78 | struct can_priv can; |
| 79 | struct qti_can *qti_can; |
| 80 | u8 netdev_index; |
| 81 | }; |
| 82 | |
| 83 | struct qti_can_tx_work { |
| 84 | struct work_struct work; |
| 85 | struct sk_buff *skb; |
| 86 | struct net_device *netdev; |
| 87 | }; |
| 88 | |
| 89 | /* Message definitions */ |
| 90 | struct spi_mosi { /* TLV for MOSI line */ |
| 91 | u8 cmd; |
| 92 | u8 len; |
| 93 | u16 seq; |
| 94 | u8 data[]; |
| 95 | } __packed; |
| 96 | |
| 97 | struct spi_miso { /* TLV for MISO line */ |
| 98 | u8 cmd; |
| 99 | u8 len; |
| 100 | u16 seq; /* should match seq field from request, or 0 for unsols */ |
| 101 | u8 data[]; |
| 102 | } __packed; |
| 103 | |
| 104 | #define CMD_GET_FW_VERSION 0x81 |
| 105 | #define CMD_CAN_SEND_FRAME 0x82 |
| 106 | #define CMD_CAN_ADD_FILTER 0x83 |
| 107 | #define CMD_CAN_REMOVE_FILTER 0x84 |
| 108 | #define CMD_CAN_RECEIVE_FRAME 0x85 |
| 109 | #define CMD_CAN_CONFIG_BIT_TIMING 0x86 |
| 110 | #define CMD_CAN_DATA_BUFF_ADD 0x87 |
| 111 | #define CMD_CAN_DATA_BUFF_REMOVE 0X88 |
| 112 | #define CMD_CAN_RELEASE_BUFFER 0x89 |
| 113 | #define CMD_CAN_DATA_BUFF_REMOVE_ALL 0x8A |
| 114 | #define CMD_PROPERTY_WRITE 0x8B |
| 115 | #define CMD_PROPERTY_READ 0x8C |
| 116 | #define CMD_GET_FW_BR_VERSION 0x95 |
| 117 | #define CMD_BEGIN_FIRMWARE_UPGRADE 0x96 |
| 118 | #define CMD_FIRMWARE_UPGRADE_DATA 0x97 |
| 119 | #define CMD_END_FIRMWARE_UPGRADE 0x98 |
| 120 | #define CMD_BEGIN_BOOT_ROM_UPGRADE 0x99 |
| 121 | #define CMD_BOOT_ROM_UPGRADE_DATA 0x9A |
| 122 | #define CMD_END_BOOT_ROM_UPGRADE 0x9B |
| 123 | #define CMD_END_FW_UPDATE_FILE 0x9C |
| 124 | #define CMD_UPDATE_TIME_INFO 0x9D |
Sumeet Sahu | 6fe22ea | 2019-03-21 17:46:32 +0530 | [diff] [blame] | 125 | #define CMD_SUSPEND_EVENT 0x9E |
| 126 | #define CMD_RESUME_EVENT 0x9F |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 127 | |
| 128 | #define IOCTL_RELEASE_CAN_BUFFER (SIOCDEVPRIVATE + 0) |
| 129 | #define IOCTL_ENABLE_BUFFERING (SIOCDEVPRIVATE + 1) |
| 130 | #define IOCTL_ADD_FRAME_FILTER (SIOCDEVPRIVATE + 2) |
| 131 | #define IOCTL_REMOVE_FRAME_FILTER (SIOCDEVPRIVATE + 3) |
| 132 | #define IOCTL_DISABLE_BUFFERING (SIOCDEVPRIVATE + 5) |
| 133 | #define IOCTL_DISABLE_ALL_BUFFERING (SIOCDEVPRIVATE + 6) |
| 134 | #define IOCTL_GET_FW_BR_VERSION (SIOCDEVPRIVATE + 7) |
| 135 | #define IOCTL_BEGIN_FIRMWARE_UPGRADE (SIOCDEVPRIVATE + 8) |
| 136 | #define IOCTL_FIRMWARE_UPGRADE_DATA (SIOCDEVPRIVATE + 9) |
| 137 | #define IOCTL_END_FIRMWARE_UPGRADE (SIOCDEVPRIVATE + 10) |
| 138 | #define IOCTL_BEGIN_BOOT_ROM_UPGRADE (SIOCDEVPRIVATE + 11) |
| 139 | #define IOCTL_BOOT_ROM_UPGRADE_DATA (SIOCDEVPRIVATE + 12) |
| 140 | #define IOCTL_END_BOOT_ROM_UPGRADE (SIOCDEVPRIVATE + 13) |
| 141 | #define IOCTL_END_FW_UPDATE_FILE (SIOCDEVPRIVATE + 14) |
| 142 | |
| 143 | #define IFR_DATA_OFFSET 0x100 |
| 144 | struct can_fw_resp { |
| 145 | u8 maj; |
Aishwarya Prasad | b4dab66 | 2020-01-31 15:28:41 +0530 | [diff] [blame] | 146 | u8 min : 4; |
| 147 | u8 sub_min : 4; |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 148 | u8 ver[48]; |
| 149 | } __packed; |
| 150 | |
| 151 | struct can_write_req { |
| 152 | u8 can_if; |
| 153 | u32 mid; |
| 154 | u8 dlc; |
| 155 | u8 data[8]; |
| 156 | } __packed; |
| 157 | |
| 158 | struct can_write_resp { |
| 159 | u8 err; |
| 160 | } __packed; |
| 161 | |
| 162 | struct can_filter_req { |
| 163 | u8 can_if; |
| 164 | u32 mid; |
| 165 | u32 mask; |
| 166 | } __packed; |
| 167 | |
| 168 | struct can_add_filter_resp { |
| 169 | u8 err; |
| 170 | } __packed; |
| 171 | |
| 172 | struct can_receive_frame { |
| 173 | u8 can_if; |
| 174 | __le64 ts; |
| 175 | __le32 mid; |
| 176 | u8 dlc; |
| 177 | u8 data[8]; |
| 178 | } __packed; |
| 179 | |
| 180 | struct can_config_bit_timing { |
| 181 | u8 can_if; |
| 182 | u32 prop_seg; |
| 183 | u32 phase_seg1; |
| 184 | u32 phase_seg2; |
| 185 | u32 sjw; |
| 186 | u32 brp; |
| 187 | } __packed; |
| 188 | |
| 189 | struct can_time_info { |
| 190 | __le64 time; |
| 191 | } __packed; |
| 192 | |
| 193 | static struct can_bittiming_const rh850_bittiming_const = { |
| 194 | .name = "qti_can", |
| 195 | .tseg1_min = 1, |
| 196 | .tseg1_max = 16, |
| 197 | .tseg2_min = 1, |
| 198 | .tseg2_max = 16, |
| 199 | .sjw_max = 4, |
| 200 | .brp_min = 1, |
| 201 | .brp_max = 70, |
| 202 | .brp_inc = 1, |
| 203 | }; |
| 204 | |
| 205 | static struct can_bittiming_const flexcan_bittiming_const = { |
| 206 | .name = "qti_can", |
| 207 | .tseg1_min = 4, |
| 208 | .tseg1_max = 16, |
| 209 | .tseg2_min = 2, |
| 210 | .tseg2_max = 8, |
| 211 | .sjw_max = 4, |
| 212 | .brp_min = 1, |
| 213 | .brp_max = 256, |
| 214 | .brp_inc = 1, |
| 215 | }; |
| 216 | |
| 217 | static struct can_bittiming_const qti_can_bittiming_const; |
| 218 | |
| 219 | static struct can_bittiming_const qti_can_data_bittiming_const = { |
| 220 | .name = "qti_can", |
| 221 | .tseg1_min = 1, |
| 222 | .tseg1_max = 16, |
| 223 | .tseg2_min = 1, |
| 224 | .tseg2_max = 16, |
| 225 | .sjw_max = 4, |
| 226 | .brp_min = 1, |
| 227 | .brp_max = 70, |
| 228 | .brp_inc = 1, |
| 229 | }; |
| 230 | |
| 231 | struct vehicle_property { |
| 232 | int id; |
| 233 | __le64 ts; |
| 234 | int zone; |
| 235 | int val_type; |
| 236 | u32 data_len; |
| 237 | union { |
| 238 | u8 bval; |
| 239 | int val; |
| 240 | int val_arr[4]; |
| 241 | float f_value; |
| 242 | float float_arr[4]; |
| 243 | u8 str[36]; |
| 244 | }; |
| 245 | } __packed; |
| 246 | |
| 247 | struct qti_can_release_can_buffer { |
| 248 | u8 enable; |
| 249 | } __packed; |
| 250 | |
| 251 | struct qti_can_buffer { |
| 252 | u8 can_if; |
| 253 | u32 mid; |
| 254 | u32 mask; |
| 255 | } __packed; |
| 256 | |
| 257 | struct can_fw_br_resp { |
| 258 | u8 maj; |
Aishwarya Prasad | b4dab66 | 2020-01-31 15:28:41 +0530 | [diff] [blame] | 259 | u8 min : 4; |
| 260 | u8 sub_min : 4; |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 261 | u8 ver[32]; |
| 262 | u8 br_maj; |
| 263 | u8 br_min; |
| 264 | u8 curr_exec_mode; |
| 265 | } __packed; |
| 266 | |
| 267 | struct qti_can_ioctl_req { |
| 268 | u8 len; |
| 269 | u8 data[64]; |
| 270 | } __packed; |
| 271 | |
| 272 | static int qti_can_rx_message(struct qti_can *priv_data); |
| 273 | |
| 274 | static irqreturn_t qti_can_irq(int irq, void *priv) |
| 275 | { |
| 276 | struct qti_can *priv_data = priv; |
| 277 | |
| 278 | LOGDI("%s\n", __func__); |
| 279 | qti_can_rx_message(priv_data); |
| 280 | return IRQ_HANDLED; |
| 281 | } |
| 282 | |
| 283 | static void qti_can_receive_frame(struct qti_can *priv_data, |
| 284 | struct can_receive_frame *frame) |
| 285 | { |
| 286 | struct can_frame *cf; |
| 287 | struct sk_buff *skb; |
| 288 | struct skb_shared_hwtstamps *skt; |
| 289 | ktime_t nsec; |
| 290 | struct net_device *netdev; |
| 291 | int i; |
| 292 | struct device *dev; |
| 293 | |
| 294 | dev = &priv_data->spidev->dev; |
| 295 | if (frame->can_if >= priv_data->max_can_channels) { |
| 296 | LOGDE("qti_can rcv error. Channel is %d\n", frame->can_if); |
| 297 | return; |
| 298 | } |
| 299 | |
| 300 | netdev = priv_data->netdev[frame->can_if]; |
| 301 | skb = alloc_can_skb(netdev, &cf); |
| 302 | if (!skb) { |
| 303 | LOGDE("skb alloc failed. frame->can_if %d\n", frame->can_if); |
| 304 | return; |
| 305 | } |
| 306 | |
| 307 | LOGDI("rcv frame %d %llu %x %d %x %x %x %x %x %x %x %x\n", |
| 308 | frame->can_if, frame->ts, frame->mid, frame->dlc, |
| 309 | frame->data[0], frame->data[1], frame->data[2], frame->data[3], |
| 310 | frame->data[4], frame->data[5], frame->data[6], frame->data[7]); |
| 311 | cf->can_id = le32_to_cpu(frame->mid); |
| 312 | cf->can_dlc = get_can_dlc(frame->dlc); |
| 313 | |
| 314 | for (i = 0; i < cf->can_dlc; i++) |
| 315 | cf->data[i] = frame->data[i]; |
| 316 | |
| 317 | nsec = ms_to_ktime(le64_to_cpu(frame->ts) |
| 318 | + priv_data->time_diff); |
| 319 | skt = skb_hwtstamps(skb); |
| 320 | skt->hwtstamp = nsec; |
| 321 | skb->tstamp = nsec; |
| 322 | netif_rx(skb); |
| 323 | LOGDI("hwtstamp: %lld\n", ktime_to_ms(skt->hwtstamp)); |
| 324 | netdev->stats.rx_packets++; |
| 325 | } |
| 326 | |
| 327 | static void qti_can_receive_property(struct qti_can *priv_data, |
| 328 | struct vehicle_property *property) |
| 329 | { |
| 330 | struct canfd_frame *cfd; |
| 331 | u8 *p; |
| 332 | struct sk_buff *skb; |
| 333 | struct skb_shared_hwtstamps *skt; |
| 334 | ktime_t nsec; |
| 335 | struct net_device *netdev; |
| 336 | struct device *dev; |
| 337 | int i; |
| 338 | |
| 339 | /* can0 as the channel with properties */ |
| 340 | dev = &priv_data->spidev->dev; |
| 341 | netdev = priv_data->netdev[0]; |
| 342 | skb = alloc_canfd_skb(netdev, &cfd); |
| 343 | if (!skb) { |
| 344 | LOGDE("skb alloc failed. frame->can_if %d\n", 0); |
| 345 | return; |
| 346 | } |
| 347 | |
| 348 | LOGDI("rcv property:0x%x data:%2x %2x %2x %2x", property->id, |
| 349 | property->str[0], property->str[1], |
| 350 | property->str[2], property->str[3]); |
| 351 | cfd->can_id = 0x00; |
| 352 | cfd->len = sizeof(struct vehicle_property); |
| 353 | |
| 354 | p = (u8 *)property; |
| 355 | for (i = 0; i < cfd->len; i++) |
| 356 | cfd->data[i] = p[i]; |
| 357 | |
| 358 | nsec = ns_to_ktime(le64_to_cpu(property->ts)); |
| 359 | skt = skb_hwtstamps(skb); |
| 360 | skt->hwtstamp = nsec; |
| 361 | LOGDI(" hwtstamp %lld\n", ktime_to_ms(skt->hwtstamp)); |
| 362 | skb->tstamp = nsec; |
| 363 | netif_rx(skb); |
| 364 | netdev->stats.rx_packets++; |
| 365 | } |
| 366 | |
| 367 | static int qti_can_process_response(struct qti_can *priv_data, |
| 368 | struct spi_miso *resp, int length) |
| 369 | { |
| 370 | int ret = 0; |
| 371 | u64 mstime; |
| 372 | ktime_t ktime_now; |
| 373 | |
| 374 | LOGDI("<%x %2d [%d]\n", resp->cmd, resp->len, resp->seq); |
| 375 | if (resp->cmd == CMD_CAN_RECEIVE_FRAME) { |
| 376 | struct can_receive_frame *frame = |
| 377 | (struct can_receive_frame *)&resp->data; |
| 378 | if ((resp->len - (frame->dlc + sizeof(frame->dlc))) < |
| 379 | (sizeof(*frame) - (sizeof(frame->dlc) |
| 380 | + sizeof(frame->data)))) { |
| 381 | LOGDE("len:%d, size:%d\n", resp->len, sizeof(*frame)); |
| 382 | LOGDE("Check the f/w version & upgrade to latest!!\n"); |
| 383 | ret = -EUPGRADE; |
| 384 | goto exit; |
| 385 | } |
| 386 | if (resp->len > length) { |
| 387 | /* Error. This should never happen */ |
| 388 | LOGDE("%s error: Saving %d bytes\n", __func__, length); |
| 389 | memcpy(priv_data->assembly_buffer, (char *)resp, |
| 390 | length); |
| 391 | priv_data->assembly_buffer_size = length; |
| 392 | } else { |
| 393 | qti_can_receive_frame(priv_data, frame); |
| 394 | } |
| 395 | } else if (resp->cmd == CMD_PROPERTY_READ) { |
| 396 | struct vehicle_property *property = |
| 397 | (struct vehicle_property *)&resp->data; |
| 398 | |
| 399 | if (resp->len > length) { |
| 400 | /* Error. This should never happen */ |
| 401 | LOGDE("%s error: Saving %d bytes\n", __func__, length); |
| 402 | memcpy(priv_data->assembly_buffer, (char *)resp, |
| 403 | length); |
| 404 | priv_data->assembly_buffer_size = length; |
| 405 | } else { |
| 406 | qti_can_receive_property(priv_data, property); |
| 407 | } |
| 408 | } else if (resp->cmd == CMD_GET_FW_VERSION) { |
| 409 | struct can_fw_resp *fw_resp = (struct can_fw_resp *)resp->data; |
| 410 | |
Aishwarya Prasad | b4dab66 | 2020-01-31 15:28:41 +0530 | [diff] [blame] | 411 | dev_info(&priv_data->spidev->dev, "fw %d.%d.%d", |
| 412 | fw_resp->maj, fw_resp->min, fw_resp->sub_min); |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 413 | dev_info(&priv_data->spidev->dev, "fw string %s", |
| 414 | fw_resp->ver); |
| 415 | } else if (resp->cmd == CMD_GET_FW_BR_VERSION) { |
| 416 | struct can_fw_br_resp *fw_resp = |
| 417 | (struct can_fw_br_resp *)resp->data; |
| 418 | |
Aishwarya Prasad | b4dab66 | 2020-01-31 15:28:41 +0530 | [diff] [blame] | 419 | dev_info(&priv_data->spidev->dev, "fw_can %d.%d.%d", |
| 420 | fw_resp->maj, fw_resp->min, fw_resp->sub_min); |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 421 | dev_info(&priv_data->spidev->dev, "fw string %s", |
| 422 | fw_resp->ver); |
| 423 | dev_info(&priv_data->spidev->dev, "fw_br %d.%d exec_mode %d", |
| 424 | fw_resp->br_maj, fw_resp->br_min, |
| 425 | fw_resp->curr_exec_mode); |
| 426 | ret = fw_resp->curr_exec_mode << 28; |
| 427 | ret |= (fw_resp->br_maj & 0xF) << 24; |
| 428 | ret |= (fw_resp->br_min & 0xFF) << 16; |
| 429 | ret |= (fw_resp->maj & 0xF) << 8; |
Aishwarya Prasad | b4dab66 | 2020-01-31 15:28:41 +0530 | [diff] [blame] | 430 | ret |= (fw_resp->min & 0xF) << 4; |
| 431 | ret |= (fw_resp->sub_min & 0xF); |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 432 | } else if (resp->cmd == CMD_UPDATE_TIME_INFO) { |
| 433 | struct can_time_info *time_data = |
| 434 | (struct can_time_info *)resp->data; |
| 435 | |
| 436 | ktime_now = ktime_get_boottime(); |
| 437 | mstime = ktime_to_ms(ktime_now); |
| 438 | priv_data->time_diff = mstime - |
| 439 | (le64_to_cpu(time_data->time)); |
| 440 | } |
| 441 | |
| 442 | exit: |
| 443 | if (resp->cmd == priv_data->wait_cmd) { |
| 444 | priv_data->cmd_result = ret; |
| 445 | complete(&priv_data->response_completion); |
| 446 | } |
| 447 | return ret; |
| 448 | } |
| 449 | |
| 450 | static int qti_can_process_rx(struct qti_can *priv_data, char *rx_buf) |
| 451 | { |
| 452 | struct spi_miso *resp; |
| 453 | struct device *dev; |
| 454 | int length_processed = 0, actual_length = priv_data->xfer_length; |
| 455 | int ret = 0; |
| 456 | |
| 457 | dev = &priv_data->spidev->dev; |
| 458 | while (length_processed < actual_length) { |
| 459 | int length_left = actual_length - length_processed; |
| 460 | int length = 0; /* length of consumed chunk */ |
| 461 | void *data; |
| 462 | |
| 463 | if (priv_data->assembly_buffer_size > 0) { |
| 464 | LOGDI("callback: Reassembling %d bytes\n", |
| 465 | priv_data->assembly_buffer_size); |
| 466 | /* should copy just 1 byte instead, since cmd should */ |
| 467 | /* already been copied as being first byte */ |
| 468 | memcpy(priv_data->assembly_buffer + |
| 469 | priv_data->assembly_buffer_size, |
| 470 | rx_buf, 2); |
| 471 | data = priv_data->assembly_buffer; |
| 472 | resp = (struct spi_miso *)data; |
| 473 | length = resp->len + sizeof(*resp) |
| 474 | - priv_data->assembly_buffer_size; |
| 475 | if (length > 0) |
| 476 | memcpy(priv_data->assembly_buffer + |
| 477 | priv_data->assembly_buffer_size, |
| 478 | rx_buf, length); |
| 479 | length_left += priv_data->assembly_buffer_size; |
| 480 | priv_data->assembly_buffer_size = 0; |
| 481 | } else { |
| 482 | data = rx_buf + length_processed; |
| 483 | resp = (struct spi_miso *)data; |
| 484 | if (resp->cmd == 0x00 || resp->cmd == 0xFF) { |
| 485 | /* special case. ignore cmd==0x00, 0xFF */ |
| 486 | length_processed += 1; |
| 487 | continue; |
| 488 | } |
| 489 | length = resp->len + sizeof(struct spi_miso); |
| 490 | } |
| 491 | LOGDI("processing. p %d -> l %d (t %d)\n", |
| 492 | length_processed, length_left, priv_data->xfer_length); |
| 493 | length_processed += length; |
| 494 | if (length_left >= sizeof(*resp) && |
| 495 | resp->len + sizeof(*resp) <= length_left) { |
| 496 | struct spi_miso *resp = |
| 497 | (struct spi_miso *)data; |
| 498 | ret = qti_can_process_response(priv_data, resp, |
| 499 | length_left); |
| 500 | } else if (length_left > 0) { |
| 501 | /* Not full message. Store however much we have for */ |
| 502 | /* later assembly */ |
| 503 | LOGDI("callback: Storing %d bytes of response\n", |
| 504 | length_left); |
| 505 | memcpy(priv_data->assembly_buffer, data, length_left); |
| 506 | priv_data->assembly_buffer_size = length_left; |
| 507 | break; |
| 508 | } |
| 509 | } |
| 510 | return ret; |
| 511 | } |
| 512 | |
| 513 | static int qti_can_do_spi_transaction(struct qti_can *priv_data) |
| 514 | { |
| 515 | struct spi_device *spi; |
| 516 | struct spi_transfer *xfer; |
| 517 | struct spi_message *msg; |
| 518 | struct device *dev; |
| 519 | int ret; |
| 520 | |
| 521 | spi = priv_data->spidev; |
| 522 | dev = &spi->dev; |
| 523 | msg = devm_kzalloc(&spi->dev, sizeof(*msg), GFP_KERNEL); |
| 524 | xfer = devm_kzalloc(&spi->dev, sizeof(*xfer), GFP_KERNEL); |
| 525 | if (!xfer || !msg) |
| 526 | return -ENOMEM; |
| 527 | LOGDI(">%x %2d [%d]\n", priv_data->tx_buf[0], |
| 528 | priv_data->tx_buf[1], priv_data->tx_buf[2]); |
| 529 | spi_message_init(msg); |
| 530 | spi_message_add_tail(xfer, msg); |
| 531 | xfer->tx_buf = priv_data->tx_buf; |
| 532 | xfer->rx_buf = priv_data->rx_buf; |
| 533 | xfer->len = priv_data->xfer_length; |
| 534 | xfer->bits_per_word = priv_data->bits_per_word; |
| 535 | ret = spi_sync(spi, msg); |
| 536 | LOGDI("spi_sync ret %d data %x %x %x %x %x %x %x %x\n", ret, |
| 537 | priv_data->rx_buf[0], priv_data->rx_buf[1], |
| 538 | priv_data->rx_buf[2], priv_data->rx_buf[3], |
| 539 | priv_data->rx_buf[4], priv_data->rx_buf[5], |
| 540 | priv_data->rx_buf[6], priv_data->rx_buf[7]); |
| 541 | |
| 542 | if (ret == 0) |
| 543 | qti_can_process_rx(priv_data, priv_data->rx_buf); |
| 544 | devm_kfree(&spi->dev, msg); |
| 545 | devm_kfree(&spi->dev, xfer); |
| 546 | return ret; |
| 547 | } |
| 548 | |
| 549 | static int qti_can_rx_message(struct qti_can *priv_data) |
| 550 | { |
| 551 | char *tx_buf, *rx_buf; |
| 552 | int ret; |
| 553 | |
| 554 | mutex_lock(&priv_data->spi_lock); |
| 555 | tx_buf = priv_data->tx_buf; |
| 556 | rx_buf = priv_data->rx_buf; |
| 557 | memset(tx_buf, 0, XFER_BUFFER_SIZE); |
| 558 | memset(rx_buf, 0, XFER_BUFFER_SIZE); |
| 559 | priv_data->xfer_length = XFER_BUFFER_SIZE; |
| 560 | |
| 561 | ret = qti_can_do_spi_transaction(priv_data); |
| 562 | mutex_unlock(&priv_data->spi_lock); |
| 563 | |
| 564 | return ret; |
| 565 | } |
| 566 | |
| 567 | static int qti_can_query_firmware_version(struct qti_can *priv_data) |
| 568 | { |
| 569 | char *tx_buf, *rx_buf; |
| 570 | int ret; |
| 571 | struct spi_mosi *req; |
| 572 | |
| 573 | mutex_lock(&priv_data->spi_lock); |
| 574 | tx_buf = priv_data->tx_buf; |
| 575 | rx_buf = priv_data->rx_buf; |
| 576 | memset(tx_buf, 0, XFER_BUFFER_SIZE); |
| 577 | memset(rx_buf, 0, XFER_BUFFER_SIZE); |
| 578 | priv_data->xfer_length = XFER_BUFFER_SIZE; |
| 579 | |
| 580 | req = (struct spi_mosi *)tx_buf; |
| 581 | req->cmd = CMD_GET_FW_VERSION; |
| 582 | req->len = 0; |
| 583 | req->seq = atomic_inc_return(&priv_data->msg_seq); |
| 584 | |
| 585 | priv_data->wait_cmd = CMD_GET_FW_VERSION; |
| 586 | priv_data->cmd_result = -1; |
| 587 | reinit_completion(&priv_data->response_completion); |
| 588 | |
| 589 | ret = qti_can_do_spi_transaction(priv_data); |
| 590 | mutex_unlock(&priv_data->spi_lock); |
| 591 | |
| 592 | if (ret == 0) { |
| 593 | LOGDI("waiting for completion with timeout of %lu jiffies", |
| 594 | msecs_to_jiffies(QUERY_FIRMWARE_TIMEOUT_MS)); |
| 595 | wait_for_completion_interruptible_timeout( |
| 596 | &priv_data->response_completion, |
| 597 | msecs_to_jiffies(QUERY_FIRMWARE_TIMEOUT_MS)); |
| 598 | LOGDI("done waiting"); |
| 599 | ret = priv_data->cmd_result; |
| 600 | } |
| 601 | |
| 602 | return ret; |
| 603 | } |
| 604 | |
Sumeet Sahu | 6fe22ea | 2019-03-21 17:46:32 +0530 | [diff] [blame] | 605 | static int qti_can_notify_power_events(struct qti_can *priv_data, u8 event_type) |
| 606 | { |
| 607 | char *tx_buf, *rx_buf; |
| 608 | int ret; |
| 609 | struct spi_mosi *req; |
| 610 | |
| 611 | mutex_lock(&priv_data->spi_lock); |
| 612 | tx_buf = priv_data->tx_buf; |
| 613 | rx_buf = priv_data->rx_buf; |
| 614 | memset(tx_buf, 0, XFER_BUFFER_SIZE); |
| 615 | memset(rx_buf, 0, XFER_BUFFER_SIZE); |
| 616 | priv_data->xfer_length = XFER_BUFFER_SIZE; |
| 617 | |
| 618 | req = (struct spi_mosi *)tx_buf; |
| 619 | req->cmd = event_type; |
| 620 | req->len = 0; |
| 621 | req->seq = atomic_inc_return(&priv_data->msg_seq); |
| 622 | |
| 623 | ret = qti_can_do_spi_transaction(priv_data); |
| 624 | mutex_unlock(&priv_data->spi_lock); |
| 625 | |
| 626 | return ret; |
| 627 | } |
| 628 | |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 629 | static int qti_can_set_bitrate(struct net_device *netdev) |
| 630 | { |
| 631 | char *tx_buf, *rx_buf; |
| 632 | int ret; |
| 633 | struct spi_mosi *req; |
| 634 | struct can_config_bit_timing *req_d; |
| 635 | struct qti_can *priv_data; |
| 636 | struct can_priv *priv = netdev_priv(netdev); |
| 637 | struct qti_can_netdev_privdata *qti_can_priv; |
| 638 | |
| 639 | qti_can_priv = netdev_priv(netdev); |
| 640 | priv_data = qti_can_priv->qti_can; |
| 641 | |
| 642 | netdev_info(netdev, "ch%i, bitrate setting>%i", |
| 643 | qti_can_priv->netdev_index, priv->bittiming.bitrate); |
| 644 | LOGNI("sjw>%i brp>%i ph_sg1>%i ph_sg2>%i smpl_pt>%i tq>%i pr_seg>%i", |
| 645 | priv->bittiming.sjw, priv->bittiming.brp, |
| 646 | priv->bittiming.phase_seg1, |
| 647 | priv->bittiming.phase_seg2, |
| 648 | priv->bittiming.sample_point, |
| 649 | priv->bittiming.tq, priv->bittiming.prop_seg); |
| 650 | |
| 651 | mutex_lock(&priv_data->spi_lock); |
| 652 | tx_buf = priv_data->tx_buf; |
| 653 | rx_buf = priv_data->rx_buf; |
| 654 | memset(tx_buf, 0, XFER_BUFFER_SIZE); |
| 655 | memset(rx_buf, 0, XFER_BUFFER_SIZE); |
| 656 | priv_data->xfer_length = XFER_BUFFER_SIZE; |
| 657 | |
| 658 | req = (struct spi_mosi *)tx_buf; |
| 659 | req->cmd = CMD_CAN_CONFIG_BIT_TIMING; |
| 660 | req->len = sizeof(struct can_config_bit_timing); |
| 661 | req->seq = atomic_inc_return(&priv_data->msg_seq); |
| 662 | req_d = (struct can_config_bit_timing *)req->data; |
| 663 | req_d->can_if = qti_can_priv->netdev_index; |
| 664 | req_d->prop_seg = priv->bittiming.prop_seg; |
| 665 | req_d->phase_seg1 = priv->bittiming.phase_seg1; |
| 666 | req_d->phase_seg2 = priv->bittiming.phase_seg2; |
| 667 | req_d->sjw = priv->bittiming.sjw; |
| 668 | req_d->brp = priv->bittiming.brp; |
| 669 | ret = qti_can_do_spi_transaction(priv_data); |
| 670 | mutex_unlock(&priv_data->spi_lock); |
| 671 | |
| 672 | return ret; |
| 673 | } |
| 674 | |
| 675 | static int qti_can_write(struct qti_can *priv_data, |
| 676 | int can_channel, struct canfd_frame *cf) |
| 677 | { |
| 678 | char *tx_buf, *rx_buf; |
| 679 | int ret, i; |
| 680 | struct spi_mosi *req; |
| 681 | struct can_write_req *req_d; |
| 682 | struct net_device *netdev; |
| 683 | |
| 684 | if (can_channel < 0 || can_channel >= priv_data->max_can_channels) { |
| 685 | LOGDE("%s error. Channel is %d\n", __func__, can_channel); |
| 686 | return -EINVAL; |
| 687 | } |
| 688 | |
| 689 | mutex_lock(&priv_data->spi_lock); |
| 690 | tx_buf = priv_data->tx_buf; |
| 691 | rx_buf = priv_data->rx_buf; |
| 692 | memset(tx_buf, 0, XFER_BUFFER_SIZE); |
| 693 | memset(rx_buf, 0, XFER_BUFFER_SIZE); |
| 694 | priv_data->xfer_length = XFER_BUFFER_SIZE; |
| 695 | |
| 696 | req = (struct spi_mosi *)tx_buf; |
| 697 | if (priv_data->driver_mode == DRIVER_MODE_RAW_FRAMES) { |
| 698 | req->cmd = CMD_CAN_SEND_FRAME; |
| 699 | req->len = sizeof(struct can_write_req) + 8; |
| 700 | req->seq = atomic_inc_return(&priv_data->msg_seq); |
| 701 | |
| 702 | req_d = (struct can_write_req *)req->data; |
| 703 | req_d->can_if = can_channel; |
| 704 | req_d->mid = cf->can_id; |
| 705 | req_d->dlc = cf->len; |
| 706 | |
| 707 | for (i = 0; i < cf->len; i++) |
| 708 | req_d->data[i] = cf->data[i]; |
| 709 | } else if (priv_data->driver_mode == DRIVER_MODE_PROPERTIES || |
| 710 | priv_data->driver_mode == DRIVER_MODE_AMB) { |
| 711 | req->cmd = CMD_PROPERTY_WRITE; |
| 712 | req->len = sizeof(struct vehicle_property); |
| 713 | req->seq = atomic_inc_return(&priv_data->msg_seq); |
| 714 | for (i = 0; i < cf->len; i++) |
| 715 | req->data[i] = cf->data[i]; |
| 716 | } else { |
| 717 | LOGDE("%s: wrong driver mode %i", |
| 718 | __func__, priv_data->driver_mode); |
| 719 | } |
| 720 | |
| 721 | ret = qti_can_do_spi_transaction(priv_data); |
| 722 | netdev = priv_data->netdev[can_channel]; |
| 723 | netdev->stats.tx_packets++; |
| 724 | mutex_unlock(&priv_data->spi_lock); |
| 725 | |
| 726 | return ret; |
| 727 | } |
| 728 | |
| 729 | static int qti_can_netdev_open(struct net_device *netdev) |
| 730 | { |
| 731 | int err; |
| 732 | |
| 733 | LOGNI("Open"); |
| 734 | err = open_candev(netdev); |
| 735 | if (err) |
| 736 | return err; |
| 737 | |
| 738 | netif_start_queue(netdev); |
| 739 | |
| 740 | return 0; |
| 741 | } |
| 742 | |
| 743 | static int qti_can_netdev_close(struct net_device *netdev) |
| 744 | { |
| 745 | LOGNI("Close"); |
| 746 | |
| 747 | netif_stop_queue(netdev); |
| 748 | close_candev(netdev); |
| 749 | return 0; |
| 750 | } |
| 751 | |
| 752 | static void qti_can_send_can_frame(struct work_struct *ws) |
| 753 | { |
| 754 | struct qti_can_tx_work *tx_work; |
| 755 | struct canfd_frame *cf; |
| 756 | struct qti_can *priv_data; |
| 757 | struct net_device *netdev; |
| 758 | struct qti_can_netdev_privdata *netdev_priv_data; |
| 759 | int can_channel; |
| 760 | |
| 761 | tx_work = container_of(ws, struct qti_can_tx_work, work); |
| 762 | netdev = tx_work->netdev; |
| 763 | netdev_priv_data = netdev_priv(netdev); |
| 764 | priv_data = netdev_priv_data->qti_can; |
| 765 | can_channel = netdev_priv_data->netdev_index; |
| 766 | |
| 767 | LOGDI("send_can_frame ws %pK\n", ws); |
| 768 | LOGDI("send_can_frame tx %pK\n", tx_work); |
| 769 | |
| 770 | cf = (struct canfd_frame *)tx_work->skb->data; |
| 771 | qti_can_write(priv_data, can_channel, cf); |
| 772 | |
| 773 | dev_kfree_skb(tx_work->skb); |
| 774 | kfree(tx_work); |
| 775 | } |
| 776 | |
| 777 | static netdev_tx_t qti_can_netdev_start_xmit( |
| 778 | struct sk_buff *skb, struct net_device *netdev) |
| 779 | { |
| 780 | struct qti_can_netdev_privdata *netdev_priv_data = netdev_priv(netdev); |
| 781 | struct qti_can *priv_data = netdev_priv_data->qti_can; |
| 782 | struct qti_can_tx_work *tx_work; |
| 783 | |
| 784 | LOGNI("netdev_start_xmit"); |
| 785 | if (can_dropped_invalid_skb(netdev, skb)) { |
| 786 | LOGNE("Dropping invalid can frame\n"); |
| 787 | return NETDEV_TX_OK; |
| 788 | } |
| 789 | tx_work = kzalloc(sizeof(*tx_work), GFP_ATOMIC); |
| 790 | if (!tx_work) |
| 791 | return NETDEV_TX_OK; |
| 792 | INIT_WORK(&tx_work->work, qti_can_send_can_frame); |
| 793 | tx_work->netdev = netdev; |
| 794 | tx_work->skb = skb; |
| 795 | queue_work(priv_data->tx_wq, &tx_work->work); |
| 796 | |
| 797 | return NETDEV_TX_OK; |
| 798 | } |
| 799 | |
| 800 | static int qti_can_send_release_can_buffer_cmd(struct net_device *netdev) |
| 801 | { |
| 802 | char *tx_buf, *rx_buf; |
| 803 | int ret; |
| 804 | struct spi_mosi *req; |
| 805 | struct qti_can *priv_data; |
| 806 | struct qti_can_netdev_privdata *netdev_priv_data; |
| 807 | int *mode; |
| 808 | |
| 809 | netdev_priv_data = netdev_priv(netdev); |
| 810 | priv_data = netdev_priv_data->qti_can; |
| 811 | mutex_lock(&priv_data->spi_lock); |
| 812 | tx_buf = priv_data->tx_buf; |
| 813 | rx_buf = priv_data->rx_buf; |
| 814 | memset(tx_buf, 0, XFER_BUFFER_SIZE); |
| 815 | memset(rx_buf, 0, XFER_BUFFER_SIZE); |
| 816 | priv_data->xfer_length = XFER_BUFFER_SIZE; |
| 817 | |
| 818 | req = (struct spi_mosi *)tx_buf; |
| 819 | req->cmd = CMD_CAN_RELEASE_BUFFER; |
| 820 | req->len = sizeof(int); |
| 821 | req->seq = atomic_inc_return(&priv_data->msg_seq); |
| 822 | mode = (int *)req->data; |
| 823 | *mode = priv_data->driver_mode; |
| 824 | |
| 825 | ret = qti_can_do_spi_transaction(priv_data); |
| 826 | mutex_unlock(&priv_data->spi_lock); |
| 827 | return ret; |
| 828 | } |
| 829 | |
| 830 | static int qti_can_data_buffering(struct net_device *netdev, |
| 831 | struct ifreq *ifr, int cmd) |
| 832 | { |
| 833 | char *tx_buf, *rx_buf; |
| 834 | int ret; |
| 835 | u32 timeout; |
| 836 | struct spi_mosi *req; |
| 837 | struct qti_can_buffer *enable_buffering; |
| 838 | struct qti_can_buffer *add_request; |
| 839 | struct qti_can *priv_data; |
| 840 | struct qti_can_netdev_privdata *netdev_priv_data; |
| 841 | struct spi_device *spi; |
| 842 | |
| 843 | netdev_priv_data = netdev_priv(netdev); |
| 844 | priv_data = netdev_priv_data->qti_can; |
| 845 | spi = priv_data->spidev; |
| 846 | timeout = priv_data->can_fw_cmd_timeout_ms; |
| 847 | |
| 848 | mutex_lock(&priv_data->spi_lock); |
| 849 | tx_buf = priv_data->tx_buf; |
| 850 | rx_buf = priv_data->rx_buf; |
| 851 | memset(tx_buf, 0, XFER_BUFFER_SIZE); |
| 852 | memset(rx_buf, 0, XFER_BUFFER_SIZE); |
| 853 | priv_data->xfer_length = XFER_BUFFER_SIZE; |
| 854 | if (!ifr) |
| 855 | return -EINVAL; |
| 856 | add_request = devm_kzalloc(&spi->dev, |
| 857 | sizeof(struct qti_can_buffer), |
| 858 | GFP_KERNEL); |
| 859 | if (!add_request) |
| 860 | return -ENOMEM; |
| 861 | |
| 862 | if (copy_from_user(add_request, ifr->ifr_data, |
| 863 | sizeof(struct qti_can_buffer))) { |
| 864 | devm_kfree(&spi->dev, add_request); |
| 865 | return -EFAULT; |
| 866 | } |
| 867 | |
| 868 | req = (struct spi_mosi *)tx_buf; |
| 869 | if (cmd == IOCTL_ENABLE_BUFFERING) |
| 870 | req->cmd = CMD_CAN_DATA_BUFF_ADD; |
| 871 | else |
| 872 | req->cmd = CMD_CAN_DATA_BUFF_REMOVE; |
| 873 | req->len = sizeof(struct qti_can_buffer); |
| 874 | req->seq = atomic_inc_return(&priv_data->msg_seq); |
| 875 | |
| 876 | enable_buffering = (struct qti_can_buffer *)req->data; |
| 877 | enable_buffering->can_if = add_request->can_if; |
| 878 | enable_buffering->mid = add_request->mid; |
| 879 | enable_buffering->mask = add_request->mask; |
| 880 | |
| 881 | if (priv_data->can_fw_cmd_timeout_req) { |
| 882 | priv_data->wait_cmd = req->cmd; |
| 883 | priv_data->cmd_result = -1; |
| 884 | reinit_completion(&priv_data->response_completion); |
| 885 | } |
| 886 | |
| 887 | ret = qti_can_do_spi_transaction(priv_data); |
| 888 | devm_kfree(&spi->dev, add_request); |
| 889 | mutex_unlock(&priv_data->spi_lock); |
| 890 | |
| 891 | if (ret == 0 && priv_data->can_fw_cmd_timeout_req) { |
| 892 | LOGDI("%s ready to wait for response\n", __func__); |
| 893 | ret = wait_for_completion_interruptible_timeout( |
| 894 | &priv_data->response_completion, |
| 895 | msecs_to_jiffies(timeout)); |
| 896 | ret = priv_data->cmd_result; |
| 897 | } |
| 898 | return ret; |
| 899 | } |
| 900 | |
| 901 | static int qti_can_remove_all_buffering(struct net_device *netdev) |
| 902 | { |
| 903 | char *tx_buf, *rx_buf; |
| 904 | int ret; |
| 905 | u32 timeout; |
| 906 | struct spi_mosi *req; |
| 907 | struct qti_can *priv_data; |
| 908 | struct qti_can_netdev_privdata *netdev_priv_data; |
| 909 | |
| 910 | netdev_priv_data = netdev_priv(netdev); |
| 911 | priv_data = netdev_priv_data->qti_can; |
| 912 | timeout = priv_data->rem_all_buffering_timeout_ms; |
| 913 | |
| 914 | mutex_lock(&priv_data->spi_lock); |
| 915 | tx_buf = priv_data->tx_buf; |
| 916 | rx_buf = priv_data->rx_buf; |
| 917 | memset(tx_buf, 0, XFER_BUFFER_SIZE); |
| 918 | memset(rx_buf, 0, XFER_BUFFER_SIZE); |
| 919 | priv_data->xfer_length = XFER_BUFFER_SIZE; |
| 920 | |
| 921 | req = (struct spi_mosi *)tx_buf; |
| 922 | req->cmd = CMD_CAN_DATA_BUFF_REMOVE_ALL; |
| 923 | req->len = 0; |
| 924 | req->seq = atomic_inc_return(&priv_data->msg_seq); |
| 925 | |
| 926 | if (priv_data->can_fw_cmd_timeout_req) { |
| 927 | priv_data->wait_cmd = req->cmd; |
| 928 | priv_data->cmd_result = -1; |
| 929 | reinit_completion(&priv_data->response_completion); |
| 930 | } |
| 931 | |
| 932 | ret = qti_can_do_spi_transaction(priv_data); |
| 933 | mutex_unlock(&priv_data->spi_lock); |
| 934 | |
| 935 | if (ret == 0 && priv_data->can_fw_cmd_timeout_req) { |
| 936 | LOGDI("%s wait for response\n", __func__); |
| 937 | ret = wait_for_completion_interruptible_timeout( |
| 938 | &priv_data->response_completion, |
| 939 | msecs_to_jiffies(timeout)); |
| 940 | ret = priv_data->cmd_result; |
| 941 | } |
| 942 | |
| 943 | return ret; |
| 944 | } |
| 945 | |
| 946 | static int qti_can_frame_filter(struct net_device *netdev, |
| 947 | struct ifreq *ifr, int cmd) |
| 948 | { |
| 949 | char *tx_buf, *rx_buf; |
| 950 | int ret; |
| 951 | struct spi_mosi *req; |
| 952 | struct can_filter_req *add_filter; |
| 953 | struct can_filter_req *filter_request; |
| 954 | struct qti_can *priv_data; |
| 955 | struct qti_can_netdev_privdata *netdev_priv_data; |
| 956 | struct spi_device *spi; |
| 957 | |
| 958 | netdev_priv_data = netdev_priv(netdev); |
| 959 | priv_data = netdev_priv_data->qti_can; |
| 960 | spi = priv_data->spidev; |
| 961 | |
| 962 | mutex_lock(&priv_data->spi_lock); |
| 963 | tx_buf = priv_data->tx_buf; |
| 964 | rx_buf = priv_data->rx_buf; |
| 965 | memset(tx_buf, 0, XFER_BUFFER_SIZE); |
| 966 | memset(rx_buf, 0, XFER_BUFFER_SIZE); |
| 967 | priv_data->xfer_length = XFER_BUFFER_SIZE; |
| 968 | |
| 969 | if (!ifr) |
| 970 | return -EINVAL; |
| 971 | |
| 972 | filter_request = |
| 973 | devm_kzalloc(&spi->dev, sizeof(struct can_filter_req), |
| 974 | GFP_KERNEL); |
| 975 | if (!filter_request) |
| 976 | return -ENOMEM; |
| 977 | |
| 978 | if (copy_from_user(filter_request, ifr->ifr_data, |
| 979 | sizeof(struct can_filter_req))) { |
| 980 | devm_kfree(&spi->dev, filter_request); |
| 981 | return -EFAULT; |
| 982 | } |
| 983 | |
| 984 | req = (struct spi_mosi *)tx_buf; |
| 985 | if (cmd == IOCTL_ADD_FRAME_FILTER) |
| 986 | req->cmd = CMD_CAN_ADD_FILTER; |
| 987 | else |
| 988 | req->cmd = CMD_CAN_REMOVE_FILTER; |
| 989 | |
| 990 | req->len = sizeof(struct can_filter_req); |
| 991 | req->seq = atomic_inc_return(&priv_data->msg_seq); |
| 992 | |
| 993 | add_filter = (struct can_filter_req *)req->data; |
| 994 | add_filter->can_if = filter_request->can_if; |
| 995 | add_filter->mid = filter_request->mid; |
| 996 | add_filter->mask = filter_request->mask; |
| 997 | |
| 998 | ret = qti_can_do_spi_transaction(priv_data); |
| 999 | devm_kfree(&spi->dev, filter_request); |
| 1000 | mutex_unlock(&priv_data->spi_lock); |
| 1001 | return ret; |
| 1002 | } |
| 1003 | |
| 1004 | static int qti_can_send_spi_locked(struct qti_can *priv_data, int cmd, int len, |
| 1005 | u8 *data) |
| 1006 | { |
| 1007 | char *tx_buf, *rx_buf; |
| 1008 | struct spi_mosi *req; |
| 1009 | int ret; |
| 1010 | |
| 1011 | LOGDI("%s\n", __func__); |
| 1012 | |
| 1013 | tx_buf = priv_data->tx_buf; |
| 1014 | rx_buf = priv_data->rx_buf; |
| 1015 | memset(tx_buf, 0, XFER_BUFFER_SIZE); |
| 1016 | memset(rx_buf, 0, XFER_BUFFER_SIZE); |
| 1017 | priv_data->xfer_length = XFER_BUFFER_SIZE; |
| 1018 | |
| 1019 | req = (struct spi_mosi *)tx_buf; |
| 1020 | req->cmd = cmd; |
| 1021 | req->len = len; |
| 1022 | req->seq = atomic_inc_return(&priv_data->msg_seq); |
| 1023 | |
| 1024 | if (unlikely(len > 64)) |
| 1025 | return -EINVAL; |
| 1026 | memcpy(req->data, data, len); |
| 1027 | |
| 1028 | ret = qti_can_do_spi_transaction(priv_data); |
| 1029 | return ret; |
| 1030 | } |
| 1031 | |
| 1032 | static int qti_can_convert_ioctl_cmd_to_spi_cmd(int ioctl_cmd) |
| 1033 | { |
| 1034 | switch (ioctl_cmd) { |
| 1035 | case IOCTL_GET_FW_BR_VERSION: |
| 1036 | return CMD_GET_FW_BR_VERSION; |
| 1037 | case IOCTL_BEGIN_FIRMWARE_UPGRADE: |
| 1038 | return CMD_BEGIN_FIRMWARE_UPGRADE; |
| 1039 | case IOCTL_FIRMWARE_UPGRADE_DATA: |
| 1040 | return CMD_FIRMWARE_UPGRADE_DATA; |
| 1041 | case IOCTL_END_FIRMWARE_UPGRADE: |
| 1042 | return CMD_END_FIRMWARE_UPGRADE; |
| 1043 | case IOCTL_BEGIN_BOOT_ROM_UPGRADE: |
| 1044 | return CMD_BEGIN_BOOT_ROM_UPGRADE; |
| 1045 | case IOCTL_BOOT_ROM_UPGRADE_DATA: |
| 1046 | return CMD_BOOT_ROM_UPGRADE_DATA; |
| 1047 | case IOCTL_END_BOOT_ROM_UPGRADE: |
| 1048 | return CMD_END_BOOT_ROM_UPGRADE; |
| 1049 | case IOCTL_END_FW_UPDATE_FILE: |
| 1050 | return CMD_END_FW_UPDATE_FILE; |
| 1051 | } |
| 1052 | return -EINVAL; |
| 1053 | } |
| 1054 | |
Aishwarya Prasad | 1ce4cea | 2019-08-14 15:21:53 +0530 | [diff] [blame] | 1055 | static int qti_can_end_fwupgrade_ioctl(struct net_device *netdev, |
| 1056 | struct ifreq *ifr, int cmd) |
| 1057 | { |
| 1058 | int spi_cmd, ret; |
| 1059 | |
| 1060 | struct qti_can *priv_data; |
| 1061 | struct qti_can_netdev_privdata *netdev_priv_data; |
| 1062 | struct spi_device *spi; |
| 1063 | int len = 0; |
| 1064 | u8 *data = NULL; |
| 1065 | |
| 1066 | netdev_priv_data = netdev_priv(netdev); |
| 1067 | priv_data = netdev_priv_data->qti_can; |
| 1068 | spi = priv_data->spidev; |
| 1069 | spi_cmd = qti_can_convert_ioctl_cmd_to_spi_cmd(cmd); |
| 1070 | LOGDI("%s spi_cmd %x\n", __func__, spi_cmd); |
| 1071 | if (spi_cmd < 0) { |
| 1072 | LOGDE("%s wrong command %d\n", __func__, cmd); |
| 1073 | return spi_cmd; |
| 1074 | } |
| 1075 | |
| 1076 | if (!ifr) |
| 1077 | return -EINVAL; |
| 1078 | |
| 1079 | mutex_lock(&priv_data->spi_lock); |
| 1080 | LOGDI("%s len %d\n", __func__, len); |
| 1081 | |
| 1082 | ret = qti_can_send_spi_locked(priv_data, spi_cmd, len, data); |
| 1083 | |
| 1084 | mutex_unlock(&priv_data->spi_lock); |
| 1085 | |
| 1086 | return ret; |
| 1087 | } |
| 1088 | |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 1089 | static int qti_can_do_blocking_ioctl(struct net_device *netdev, |
| 1090 | struct ifreq *ifr, int cmd) |
| 1091 | { |
| 1092 | int spi_cmd, ret; |
| 1093 | |
| 1094 | struct qti_can *priv_data; |
| 1095 | struct qti_can_netdev_privdata *netdev_priv_data; |
| 1096 | struct qti_can_ioctl_req *ioctl_data = NULL; |
| 1097 | struct spi_device *spi; |
| 1098 | int len = 0; |
| 1099 | u8 *data = NULL; |
| 1100 | |
| 1101 | netdev_priv_data = netdev_priv(netdev); |
| 1102 | priv_data = netdev_priv_data->qti_can; |
| 1103 | spi = priv_data->spidev; |
| 1104 | |
| 1105 | spi_cmd = qti_can_convert_ioctl_cmd_to_spi_cmd(cmd); |
| 1106 | LOGDI("%s spi_cmd %x\n", __func__, spi_cmd); |
| 1107 | if (spi_cmd < 0) { |
| 1108 | LOGDE("%s wrong command %d\n", __func__, cmd); |
| 1109 | return spi_cmd; |
| 1110 | } |
| 1111 | |
| 1112 | if (!ifr) |
| 1113 | return -EINVAL; |
| 1114 | |
| 1115 | mutex_lock(&priv_data->spi_lock); |
| 1116 | if (spi_cmd == CMD_FIRMWARE_UPGRADE_DATA || |
| 1117 | spi_cmd == CMD_BOOT_ROM_UPGRADE_DATA) { |
| 1118 | ioctl_data = |
| 1119 | devm_kzalloc(&spi->dev, |
| 1120 | sizeof(struct qti_can_ioctl_req), |
| 1121 | GFP_KERNEL); |
| 1122 | if (!ioctl_data) |
| 1123 | return -ENOMEM; |
| 1124 | |
| 1125 | if (copy_from_user(ioctl_data, ifr->ifr_data, |
| 1126 | sizeof(struct qti_can_ioctl_req))) { |
| 1127 | devm_kfree(&spi->dev, ioctl_data); |
| 1128 | return -EFAULT; |
| 1129 | } |
| 1130 | |
| 1131 | if (ioctl_data->len < 0) { |
| 1132 | LOGDE("ioctl_data->len is: %d\n", ioctl_data->len); |
| 1133 | return -EINVAL; |
| 1134 | } |
| 1135 | |
| 1136 | /* Regular NULL check will fail here as ioctl_data is at |
| 1137 | * some offset |
| 1138 | */ |
| 1139 | if ((void *)ioctl_data > (void *)0x100) { |
| 1140 | len = ioctl_data->len; |
| 1141 | data = ioctl_data->data; |
| 1142 | } |
| 1143 | } |
| 1144 | LOGDI("%s len %d\n", __func__, len); |
| 1145 | |
| 1146 | if ((len > 64) || (len < 0)) { |
| 1147 | LOGDE("len value[%d] is not correct!!\n", len); |
| 1148 | return -EINVAL; |
| 1149 | } |
| 1150 | |
| 1151 | priv_data->wait_cmd = spi_cmd; |
| 1152 | priv_data->cmd_result = -1; |
| 1153 | reinit_completion(&priv_data->response_completion); |
| 1154 | |
| 1155 | ret = qti_can_send_spi_locked(priv_data, spi_cmd, len, data); |
| 1156 | if (ioctl_data) |
| 1157 | devm_kfree(&spi->dev, ioctl_data); |
| 1158 | mutex_unlock(&priv_data->spi_lock); |
| 1159 | |
| 1160 | if (ret == 0) { |
| 1161 | LOGDI("%s ready to wait for response\n", __func__); |
| 1162 | wait_for_completion_interruptible_timeout( |
| 1163 | &priv_data->response_completion, |
| 1164 | 5 * HZ); |
| 1165 | ret = priv_data->cmd_result; |
| 1166 | } |
| 1167 | return ret; |
| 1168 | } |
| 1169 | |
| 1170 | static int qti_can_netdev_do_ioctl(struct net_device *netdev, |
| 1171 | struct ifreq *ifr, int cmd) |
| 1172 | { |
| 1173 | struct qti_can *priv_data; |
| 1174 | struct qti_can_netdev_privdata *netdev_priv_data; |
| 1175 | int *mode; |
| 1176 | int ret = -EINVAL; |
| 1177 | struct spi_device *spi; |
| 1178 | |
| 1179 | netdev_priv_data = netdev_priv(netdev); |
| 1180 | priv_data = netdev_priv_data->qti_can; |
| 1181 | spi = priv_data->spidev; |
| 1182 | LOGDI("%s %x\n", __func__, cmd); |
| 1183 | |
| 1184 | switch (cmd) { |
| 1185 | case IOCTL_RELEASE_CAN_BUFFER: |
| 1186 | if (!ifr) |
| 1187 | return -EINVAL; |
| 1188 | |
| 1189 | /* Regular NULL check will fail here as ioctl_data is at |
| 1190 | * some offset |
| 1191 | */ |
| 1192 | if (ifr->ifr_data > (void __user *)IFR_DATA_OFFSET) { |
| 1193 | mutex_lock(&priv_data->spi_lock); |
| 1194 | mode = devm_kzalloc(&spi->dev, sizeof(int), GFP_KERNEL); |
| 1195 | if (!mode) |
| 1196 | return -ENOMEM; |
| 1197 | if (copy_from_user(mode, ifr->ifr_data, sizeof(int))) { |
| 1198 | devm_kfree(&spi->dev, mode); |
| 1199 | return -EFAULT; |
| 1200 | } |
| 1201 | priv_data->driver_mode = *mode; |
| 1202 | LOGDE("qti_can_driver_mode %d\n", |
| 1203 | priv_data->driver_mode); |
| 1204 | devm_kfree(&spi->dev, mode); |
| 1205 | mutex_unlock(&priv_data->spi_lock); |
| 1206 | } |
| 1207 | qti_can_send_release_can_buffer_cmd(netdev); |
| 1208 | ret = 0; |
| 1209 | break; |
| 1210 | case IOCTL_ENABLE_BUFFERING: |
| 1211 | case IOCTL_DISABLE_BUFFERING: |
| 1212 | qti_can_data_buffering(netdev, ifr, cmd); |
| 1213 | ret = 0; |
| 1214 | break; |
| 1215 | case IOCTL_DISABLE_ALL_BUFFERING: |
| 1216 | qti_can_remove_all_buffering(netdev); |
| 1217 | ret = 0; |
| 1218 | break; |
| 1219 | case IOCTL_ADD_FRAME_FILTER: |
| 1220 | case IOCTL_REMOVE_FRAME_FILTER: |
| 1221 | qti_can_frame_filter(netdev, ifr, cmd); |
| 1222 | ret = 0; |
| 1223 | break; |
Aishwarya Prasad | 1ce4cea | 2019-08-14 15:21:53 +0530 | [diff] [blame] | 1224 | case IOCTL_END_FIRMWARE_UPGRADE: |
| 1225 | ret = qti_can_end_fwupgrade_ioctl(netdev, ifr, cmd); |
| 1226 | break; |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 1227 | case IOCTL_GET_FW_BR_VERSION: |
| 1228 | case IOCTL_BEGIN_FIRMWARE_UPGRADE: |
| 1229 | case IOCTL_FIRMWARE_UPGRADE_DATA: |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 1230 | case IOCTL_BEGIN_BOOT_ROM_UPGRADE: |
| 1231 | case IOCTL_BOOT_ROM_UPGRADE_DATA: |
| 1232 | case IOCTL_END_BOOT_ROM_UPGRADE: |
| 1233 | case IOCTL_END_FW_UPDATE_FILE: |
| 1234 | ret = qti_can_do_blocking_ioctl(netdev, ifr, cmd); |
| 1235 | break; |
| 1236 | } |
| 1237 | LOGDI("%s ret %d\n", __func__, ret); |
| 1238 | |
| 1239 | return ret; |
| 1240 | } |
| 1241 | |
| 1242 | static const struct net_device_ops qti_can_netdev_ops = { |
| 1243 | .ndo_open = qti_can_netdev_open, |
| 1244 | .ndo_stop = qti_can_netdev_close, |
| 1245 | .ndo_start_xmit = qti_can_netdev_start_xmit, |
| 1246 | .ndo_do_ioctl = qti_can_netdev_do_ioctl, |
| 1247 | }; |
| 1248 | |
| 1249 | static int qti_can_create_netdev(struct spi_device *spi, |
| 1250 | struct qti_can *priv_data, int index) |
| 1251 | { |
| 1252 | struct net_device *netdev; |
| 1253 | struct qti_can_netdev_privdata *netdev_priv_data; |
| 1254 | |
| 1255 | LOGDI("%s %d\n", __func__, index); |
| 1256 | if (index < 0 || index >= priv_data->max_can_channels) { |
| 1257 | LOGDE("%s wrong index %d\n", __func__, index); |
| 1258 | return -EINVAL; |
| 1259 | } |
| 1260 | netdev = alloc_candev(sizeof(*netdev_priv_data), MAX_TX_BUFFERS); |
| 1261 | if (!netdev) { |
| 1262 | LOGDE("Couldn't alloc candev\n"); |
| 1263 | return -ENOMEM; |
| 1264 | } |
| 1265 | |
| 1266 | netdev->mtu = CANFD_MTU; |
| 1267 | |
| 1268 | netdev_priv_data = netdev_priv(netdev); |
| 1269 | netdev_priv_data->qti_can = priv_data; |
| 1270 | netdev_priv_data->netdev_index = index; |
| 1271 | |
| 1272 | priv_data->netdev[index] = netdev; |
| 1273 | |
| 1274 | netdev->netdev_ops = &qti_can_netdev_ops; |
| 1275 | SET_NETDEV_DEV(netdev, &spi->dev); |
| 1276 | netdev_priv_data->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES | |
| 1277 | CAN_CTRLMODE_LISTENONLY; |
| 1278 | if (priv_data->support_can_fd) |
| 1279 | netdev_priv_data->can.ctrlmode_supported |= CAN_CTRLMODE_FD; |
| 1280 | netdev_priv_data->can.bittiming_const = &qti_can_bittiming_const; |
| 1281 | netdev_priv_data->can.data_bittiming_const = |
| 1282 | &qti_can_data_bittiming_const; |
| 1283 | netdev_priv_data->can.clock.freq = priv_data->clk_freq_mhz; |
| 1284 | netdev_priv_data->can.do_set_bittiming = qti_can_set_bitrate; |
| 1285 | |
| 1286 | return 0; |
| 1287 | } |
| 1288 | |
| 1289 | static struct qti_can *qti_can_create_priv_data(struct spi_device *spi) |
| 1290 | { |
| 1291 | struct qti_can *priv_data; |
| 1292 | int err; |
| 1293 | struct device *dev; |
| 1294 | |
| 1295 | dev = &spi->dev; |
| 1296 | priv_data = devm_kzalloc(dev, sizeof(*priv_data), GFP_KERNEL); |
| 1297 | if (!priv_data) { |
| 1298 | err = -ENOMEM; |
| 1299 | return NULL; |
| 1300 | } |
| 1301 | spi_set_drvdata(spi, priv_data); |
| 1302 | atomic_set(&priv_data->netif_queue_stop, 0); |
| 1303 | priv_data->spidev = spi; |
| 1304 | priv_data->assembly_buffer = devm_kzalloc(dev, |
| 1305 | RX_ASSEMBLY_BUFFER_SIZE, |
| 1306 | GFP_KERNEL); |
| 1307 | if (!priv_data->assembly_buffer) { |
| 1308 | err = -ENOMEM; |
| 1309 | goto cleanup_privdata; |
| 1310 | } |
| 1311 | |
| 1312 | priv_data->tx_wq = alloc_workqueue("qti_can_tx_wq", 0, 0); |
| 1313 | if (!priv_data->tx_wq) { |
| 1314 | LOGDE("Couldn't alloc workqueue\n"); |
| 1315 | err = -ENOMEM; |
| 1316 | goto cleanup_privdata; |
| 1317 | } |
| 1318 | |
| 1319 | priv_data->tx_buf = devm_kzalloc(dev, |
| 1320 | XFER_BUFFER_SIZE, |
| 1321 | GFP_KERNEL); |
| 1322 | priv_data->rx_buf = devm_kzalloc(dev, |
| 1323 | XFER_BUFFER_SIZE, |
| 1324 | GFP_KERNEL); |
| 1325 | if (!priv_data->tx_buf || !priv_data->rx_buf) { |
| 1326 | LOGDE("Couldn't alloc tx or rx buffers\n"); |
| 1327 | err = -ENOMEM; |
| 1328 | goto cleanup_privdata; |
| 1329 | } |
| 1330 | priv_data->xfer_length = 0; |
| 1331 | priv_data->driver_mode = DRIVER_MODE_RAW_FRAMES; |
| 1332 | |
| 1333 | mutex_init(&priv_data->spi_lock); |
| 1334 | atomic_set(&priv_data->msg_seq, 0); |
| 1335 | init_completion(&priv_data->response_completion); |
| 1336 | return priv_data; |
| 1337 | |
| 1338 | cleanup_privdata: |
| 1339 | if (priv_data) { |
| 1340 | if (priv_data->tx_wq) |
| 1341 | destroy_workqueue(priv_data->tx_wq); |
| 1342 | devm_kfree(dev, priv_data->rx_buf); |
| 1343 | devm_kfree(dev, priv_data->tx_buf); |
| 1344 | devm_kfree(dev, priv_data->assembly_buffer); |
| 1345 | devm_kfree(dev, priv_data); |
| 1346 | } |
| 1347 | return NULL; |
| 1348 | } |
| 1349 | |
| 1350 | static const struct of_device_id qti_can_match_table[] = { |
| 1351 | { .compatible = "qcom,renesas,rh850" }, |
| 1352 | { .compatible = "qcom,nxp,mpc5746c" }, |
| 1353 | { } |
| 1354 | }; |
| 1355 | |
| 1356 | static int qti_can_probe(struct spi_device *spi) |
| 1357 | { |
| 1358 | int err, retry = 0, query_err = -1, i; |
| 1359 | struct qti_can *priv_data = NULL; |
| 1360 | struct device *dev; |
| 1361 | |
| 1362 | dev = &spi->dev; |
| 1363 | dev_info(dev, "%s", __func__); |
| 1364 | |
| 1365 | err = spi_setup(spi); |
| 1366 | if (err) { |
| 1367 | dev_err(dev, "spi_setup failed: %d", err); |
| 1368 | return err; |
| 1369 | } |
| 1370 | |
| 1371 | priv_data = qti_can_create_priv_data(spi); |
| 1372 | if (!priv_data) { |
| 1373 | dev_err(dev, "Failed to create qti_can priv_data\n"); |
| 1374 | err = -ENOMEM; |
| 1375 | return err; |
| 1376 | } |
| 1377 | |
| 1378 | err = of_property_read_u32(spi->dev.of_node, "qcom,clk-freq-mhz", |
| 1379 | &priv_data->clk_freq_mhz); |
| 1380 | if (err) { |
| 1381 | LOGDE("DT property: qcom,clk-freq-hz not defined\n"); |
| 1382 | return err; |
| 1383 | } |
| 1384 | |
| 1385 | err = of_property_read_u32(spi->dev.of_node, "qcom,max-can-channels", |
| 1386 | &priv_data->max_can_channels); |
| 1387 | if (err) { |
| 1388 | LOGDE("DT property: qcom,max-can-channels not defined\n"); |
| 1389 | return err; |
| 1390 | } |
| 1391 | |
| 1392 | err = of_property_read_u32(spi->dev.of_node, "qcom,bits-per-word", |
| 1393 | &priv_data->bits_per_word); |
| 1394 | if (err) |
| 1395 | priv_data->bits_per_word = 16; |
| 1396 | |
| 1397 | err = of_property_read_u32(spi->dev.of_node, "qcom,reset-delay-msec", |
| 1398 | &priv_data->reset_delay_msec); |
| 1399 | if (err) |
| 1400 | priv_data->reset_delay_msec = 1; |
| 1401 | |
| 1402 | priv_data->can_fw_cmd_timeout_req = |
| 1403 | of_property_read_bool(spi->dev.of_node, |
| 1404 | "qcom,can-fw-cmd-timeout-req"); |
| 1405 | |
| 1406 | err = of_property_read_u32(spi->dev.of_node, |
| 1407 | "qcom,can-fw-cmd-timeout-ms", |
| 1408 | &priv_data->can_fw_cmd_timeout_ms); |
| 1409 | if (err) |
| 1410 | priv_data->can_fw_cmd_timeout_ms = 0; |
| 1411 | |
| 1412 | err = of_property_read_u32(spi->dev.of_node, |
| 1413 | "qcom,rem-all-buffering-timeout-ms", |
| 1414 | &priv_data->rem_all_buffering_timeout_ms); |
| 1415 | if (err) |
| 1416 | priv_data->rem_all_buffering_timeout_ms = 0; |
| 1417 | |
| 1418 | priv_data->reset = of_get_named_gpio(spi->dev.of_node, |
| 1419 | "qcom,reset-gpio", 0); |
| 1420 | |
| 1421 | if (gpio_is_valid(priv_data->reset)) { |
| 1422 | err = gpio_request(priv_data->reset, "qti-can-reset"); |
| 1423 | if (err < 0) { |
| 1424 | LOGDE("failed to request gpio %d: %d\n", |
| 1425 | priv_data->reset, err); |
| 1426 | return err; |
| 1427 | } |
| 1428 | |
| 1429 | gpio_direction_output(priv_data->reset, 0); |
| 1430 | /* delay to generate non-zero reset pulse width */ |
| 1431 | udelay(1); |
| 1432 | gpio_direction_output(priv_data->reset, 1); |
| 1433 | /* wait for controller to come up after reset */ |
| 1434 | msleep(priv_data->reset_delay_msec); |
| 1435 | } else { |
| 1436 | msleep(priv_data->reset_delay_msec); |
| 1437 | } |
| 1438 | |
| 1439 | priv_data->support_can_fd = of_property_read_bool(spi->dev.of_node, |
| 1440 | "support-can-fd"); |
| 1441 | |
| 1442 | if (of_device_is_compatible(spi->dev.of_node, "qcom,nxp,mpc5746c")) |
| 1443 | qti_can_bittiming_const = flexcan_bittiming_const; |
| 1444 | else if (of_device_is_compatible(spi->dev.of_node, |
| 1445 | "qcom,renesas,rh850")) |
| 1446 | qti_can_bittiming_const = rh850_bittiming_const; |
| 1447 | |
| 1448 | priv_data->netdev = devm_kcalloc(dev, |
| 1449 | priv_data->max_can_channels, |
| 1450 | sizeof(priv_data->netdev[0]), |
| 1451 | GFP_KERNEL); |
| 1452 | if (!priv_data->netdev) { |
| 1453 | err = -ENOMEM; |
| 1454 | return err; |
| 1455 | } |
| 1456 | |
| 1457 | for (i = 0; i < priv_data->max_can_channels; i++) { |
| 1458 | err = qti_can_create_netdev(spi, priv_data, i); |
| 1459 | if (err) { |
| 1460 | LOGDE("Failed to create CAN device: %d", err); |
| 1461 | goto cleanup_candev; |
| 1462 | } |
| 1463 | |
| 1464 | err = register_candev(priv_data->netdev[i]); |
| 1465 | if (err) { |
| 1466 | LOGDE("Failed to register CAN device: %d", err); |
| 1467 | goto unregister_candev; |
| 1468 | } |
| 1469 | } |
| 1470 | |
| 1471 | err = request_threaded_irq(spi->irq, NULL, qti_can_irq, |
| 1472 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
| 1473 | "qti-can", priv_data); |
| 1474 | if (err) { |
| 1475 | LOGDE("Failed to request irq: %d", err); |
| 1476 | goto unregister_candev; |
| 1477 | } |
| 1478 | dev_info(dev, "Request irq %d ret %d\n", spi->irq, err); |
| 1479 | |
| 1480 | while ((query_err != 0) && (retry < QTI_CAN_FW_QUERY_RETRY_COUNT)) { |
| 1481 | LOGDI("Trying to query fw version %d", retry); |
| 1482 | query_err = qti_can_query_firmware_version(priv_data); |
| 1483 | priv_data->assembly_buffer_size = 0; |
| 1484 | retry++; |
| 1485 | } |
| 1486 | |
| 1487 | if (query_err) { |
| 1488 | LOGDE("QTI CAN probe failed\n"); |
| 1489 | err = -ENODEV; |
| 1490 | goto free_irq; |
| 1491 | } |
| 1492 | return 0; |
| 1493 | |
| 1494 | free_irq: |
| 1495 | free_irq(spi->irq, priv_data); |
| 1496 | unregister_candev: |
| 1497 | for (i = 0; i < priv_data->max_can_channels; i++) |
| 1498 | unregister_candev(priv_data->netdev[i]); |
| 1499 | cleanup_candev: |
| 1500 | if (priv_data) { |
| 1501 | for (i = 0; i < priv_data->max_can_channels; i++) { |
| 1502 | if (priv_data->netdev[i]) |
| 1503 | free_candev(priv_data->netdev[i]); |
| 1504 | } |
| 1505 | if (priv_data->tx_wq) |
| 1506 | destroy_workqueue(priv_data->tx_wq); |
| 1507 | devm_kfree(dev, priv_data->rx_buf); |
| 1508 | devm_kfree(dev, priv_data->tx_buf); |
| 1509 | devm_kfree(dev, priv_data->assembly_buffer); |
| 1510 | devm_kfree(dev, priv_data->netdev); |
| 1511 | devm_kfree(dev, priv_data); |
| 1512 | } |
| 1513 | return err; |
| 1514 | } |
| 1515 | |
| 1516 | static int qti_can_remove(struct spi_device *spi) |
| 1517 | { |
| 1518 | struct qti_can *priv_data = spi_get_drvdata(spi); |
| 1519 | int i; |
| 1520 | |
| 1521 | LOGDI("%s\n", __func__); |
| 1522 | for (i = 0; i < priv_data->max_can_channels; i++) { |
| 1523 | unregister_candev(priv_data->netdev[i]); |
| 1524 | free_candev(priv_data->netdev[i]); |
| 1525 | } |
| 1526 | destroy_workqueue(priv_data->tx_wq); |
| 1527 | kfree(priv_data->rx_buf); |
| 1528 | kfree(priv_data->tx_buf); |
| 1529 | kfree(priv_data->assembly_buffer); |
| 1530 | kfree(priv_data->netdev); |
| 1531 | kfree(priv_data); |
| 1532 | return 0; |
| 1533 | } |
| 1534 | |
| 1535 | #ifdef CONFIG_PM |
| 1536 | static int qti_can_suspend(struct device *dev) |
| 1537 | { |
| 1538 | struct spi_device *spi = to_spi_device(dev); |
| 1539 | struct qti_can *priv_data = NULL; |
Sumeet Sahu | 6fe22ea | 2019-03-21 17:46:32 +0530 | [diff] [blame] | 1540 | u8 power_event = CMD_SUSPEND_EVENT; |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 1541 | int ret = 0; |
| 1542 | |
| 1543 | if (spi) { |
| 1544 | priv_data = spi_get_drvdata(spi); |
| 1545 | enable_irq_wake(spi->irq); |
| 1546 | } else { |
| 1547 | ret = -1; |
| 1548 | } |
| 1549 | |
Sumeet Sahu | 6fe22ea | 2019-03-21 17:46:32 +0530 | [diff] [blame] | 1550 | if (priv_data && !(ret < 0)) |
| 1551 | ret = qti_can_notify_power_events(priv_data, power_event); |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 1552 | |
| 1553 | return ret; |
| 1554 | } |
| 1555 | |
| 1556 | static int qti_can_resume(struct device *dev) |
| 1557 | { |
| 1558 | struct spi_device *spi = to_spi_device(dev); |
| 1559 | struct qti_can *priv_data = NULL; |
| 1560 | int ret = 0; |
Sumeet Sahu | 6fe22ea | 2019-03-21 17:46:32 +0530 | [diff] [blame] | 1561 | u8 power_event = CMD_RESUME_EVENT; |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 1562 | |
| 1563 | if (spi) { |
| 1564 | priv_data = spi_get_drvdata(spi); |
| 1565 | disable_irq_wake(spi->irq); |
| 1566 | |
| 1567 | if (priv_data) |
| 1568 | qti_can_rx_message(priv_data); |
| 1569 | else |
| 1570 | ret = -1; |
| 1571 | |
| 1572 | } else { |
| 1573 | ret = -1; |
| 1574 | } |
| 1575 | |
Sumeet Sahu | 6fe22ea | 2019-03-21 17:46:32 +0530 | [diff] [blame] | 1576 | if (priv_data && !(ret < 0)) |
| 1577 | ret = qti_can_notify_power_events(priv_data, power_event); |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 1578 | |
| 1579 | return ret; |
| 1580 | } |
| 1581 | |
| 1582 | static const struct dev_pm_ops qti_can_dev_pm_ops = { |
| 1583 | .suspend = qti_can_suspend, |
| 1584 | .resume = qti_can_resume, |
| 1585 | }; |
| 1586 | #endif |
| 1587 | |
| 1588 | static struct spi_driver qti_can_driver = { |
| 1589 | .driver = { |
| 1590 | .name = "qti-can", |
| 1591 | .of_match_table = qti_can_match_table, |
| 1592 | .owner = THIS_MODULE, |
| 1593 | #ifdef CONFIG_PM |
| 1594 | .pm = &qti_can_dev_pm_ops, |
| 1595 | #endif |
Sumeet Sahu | 81d72e0 | 2019-03-08 18:26:48 +0530 | [diff] [blame] | 1596 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
Sumeet Sahu | cafbf63 | 2019-02-08 19:12:57 +0530 | [diff] [blame] | 1597 | }, |
| 1598 | .probe = qti_can_probe, |
| 1599 | .remove = qti_can_remove, |
| 1600 | }; |
| 1601 | module_spi_driver(qti_can_driver); |
| 1602 | |
| 1603 | MODULE_DESCRIPTION("QTI CAN controller module"); |
| 1604 | MODULE_LICENSE("GPL v2"); |