Bjorn Andersson | ea7a1f2 | 2015-09-21 10:52:55 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2015, Sony Mobile Communications Inc. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 and |
| 6 | * only version 2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | #include <linux/firmware.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/soc/qcom/smd.h> |
| 17 | |
| 18 | #define WCNSS_REQUEST_TIMEOUT (5 * HZ) |
| 19 | |
| 20 | #define NV_FRAGMENT_SIZE 3072 |
| 21 | #define NVBIN_FILE "wlan/prima/WCNSS_qcom_wlan_nv.bin" |
| 22 | |
| 23 | /** |
| 24 | * struct wcnss_ctrl - driver context |
| 25 | * @dev: device handle |
| 26 | * @channel: SMD channel handle |
| 27 | * @ack: completion for outstanding requests |
| 28 | * @ack_status: status of the outstanding request |
| 29 | * @download_nv_work: worker for uploading nv binary |
| 30 | */ |
| 31 | struct wcnss_ctrl { |
| 32 | struct device *dev; |
| 33 | struct qcom_smd_channel *channel; |
| 34 | |
| 35 | struct completion ack; |
| 36 | int ack_status; |
| 37 | |
| 38 | struct work_struct download_nv_work; |
| 39 | }; |
| 40 | |
| 41 | /* message types */ |
| 42 | enum { |
| 43 | WCNSS_VERSION_REQ = 0x01000000, |
| 44 | WCNSS_VERSION_RESP, |
| 45 | WCNSS_DOWNLOAD_NV_REQ, |
| 46 | WCNSS_DOWNLOAD_NV_RESP, |
| 47 | WCNSS_UPLOAD_CAL_REQ, |
| 48 | WCNSS_UPLOAD_CAL_RESP, |
| 49 | WCNSS_DOWNLOAD_CAL_REQ, |
| 50 | WCNSS_DOWNLOAD_CAL_RESP, |
| 51 | }; |
| 52 | |
| 53 | /** |
| 54 | * struct wcnss_msg_hdr - common packet header for requests and responses |
| 55 | * @type: packet message type |
| 56 | * @len: total length of the packet, including this header |
| 57 | */ |
| 58 | struct wcnss_msg_hdr { |
| 59 | u32 type; |
| 60 | u32 len; |
| 61 | } __packed; |
| 62 | |
| 63 | /** |
| 64 | * struct wcnss_version_resp - version request response |
| 65 | * @hdr: common packet wcnss_msg_hdr header |
| 66 | */ |
| 67 | struct wcnss_version_resp { |
| 68 | struct wcnss_msg_hdr hdr; |
| 69 | u8 major; |
| 70 | u8 minor; |
| 71 | u8 version; |
| 72 | u8 revision; |
| 73 | } __packed; |
| 74 | |
| 75 | /** |
| 76 | * struct wcnss_download_nv_req - firmware fragment request |
| 77 | * @hdr: common packet wcnss_msg_hdr header |
| 78 | * @seq: sequence number of this fragment |
| 79 | * @last: boolean indicator of this being the last fragment of the binary |
| 80 | * @frag_size: length of this fragment |
| 81 | * @fragment: fragment data |
| 82 | */ |
| 83 | struct wcnss_download_nv_req { |
| 84 | struct wcnss_msg_hdr hdr; |
| 85 | u16 seq; |
| 86 | u16 last; |
| 87 | u32 frag_size; |
| 88 | u8 fragment[]; |
| 89 | } __packed; |
| 90 | |
| 91 | /** |
| 92 | * struct wcnss_download_nv_resp - firmware download response |
| 93 | * @hdr: common packet wcnss_msg_hdr header |
| 94 | * @status: boolean to indicate success of the download |
| 95 | */ |
| 96 | struct wcnss_download_nv_resp { |
| 97 | struct wcnss_msg_hdr hdr; |
| 98 | u8 status; |
| 99 | } __packed; |
| 100 | |
| 101 | /** |
| 102 | * wcnss_ctrl_smd_callback() - handler from SMD responses |
Bjorn Andersson | b853cb9 | 2016-03-28 21:35:22 -0700 | [diff] [blame] | 103 | * @channel: smd channel handle |
Bjorn Andersson | ea7a1f2 | 2015-09-21 10:52:55 -0700 | [diff] [blame] | 104 | * @data: pointer to the incoming data packet |
| 105 | * @count: size of the incoming data packet |
| 106 | * |
| 107 | * Handles any incoming packets from the remote WCNSS_CTRL service. |
| 108 | */ |
Bjorn Andersson | b853cb9 | 2016-03-28 21:35:22 -0700 | [diff] [blame] | 109 | static int wcnss_ctrl_smd_callback(struct qcom_smd_channel *channel, |
Bjorn Andersson | ea7a1f2 | 2015-09-21 10:52:55 -0700 | [diff] [blame] | 110 | const void *data, |
| 111 | size_t count) |
| 112 | { |
Bjorn Andersson | b853cb9 | 2016-03-28 21:35:22 -0700 | [diff] [blame] | 113 | struct wcnss_ctrl *wcnss = qcom_smd_get_drvdata(channel); |
Bjorn Andersson | ea7a1f2 | 2015-09-21 10:52:55 -0700 | [diff] [blame] | 114 | const struct wcnss_download_nv_resp *nvresp; |
| 115 | const struct wcnss_version_resp *version; |
| 116 | const struct wcnss_msg_hdr *hdr = data; |
| 117 | |
| 118 | switch (hdr->type) { |
| 119 | case WCNSS_VERSION_RESP: |
| 120 | if (count != sizeof(*version)) { |
| 121 | dev_err(wcnss->dev, |
| 122 | "invalid size of version response\n"); |
| 123 | break; |
| 124 | } |
| 125 | |
| 126 | version = data; |
| 127 | dev_info(wcnss->dev, "WCNSS Version %d.%d %d.%d\n", |
| 128 | version->major, version->minor, |
| 129 | version->version, version->revision); |
| 130 | |
| 131 | schedule_work(&wcnss->download_nv_work); |
| 132 | break; |
| 133 | case WCNSS_DOWNLOAD_NV_RESP: |
| 134 | if (count != sizeof(*nvresp)) { |
| 135 | dev_err(wcnss->dev, |
| 136 | "invalid size of download response\n"); |
| 137 | break; |
| 138 | } |
| 139 | |
| 140 | nvresp = data; |
| 141 | wcnss->ack_status = nvresp->status; |
| 142 | complete(&wcnss->ack); |
| 143 | break; |
| 144 | default: |
| 145 | dev_info(wcnss->dev, "unknown message type %d\n", hdr->type); |
| 146 | break; |
| 147 | } |
| 148 | |
| 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * wcnss_request_version() - send a version request to WCNSS |
| 154 | * @wcnss: wcnss ctrl driver context |
| 155 | */ |
| 156 | static int wcnss_request_version(struct wcnss_ctrl *wcnss) |
| 157 | { |
| 158 | struct wcnss_msg_hdr msg; |
| 159 | |
| 160 | msg.type = WCNSS_VERSION_REQ; |
| 161 | msg.len = sizeof(msg); |
| 162 | |
| 163 | return qcom_smd_send(wcnss->channel, &msg, sizeof(msg)); |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * wcnss_download_nv() - send nv binary to WCNSS |
| 168 | * @work: work struct to acquire wcnss context |
| 169 | */ |
| 170 | static void wcnss_download_nv(struct work_struct *work) |
| 171 | { |
| 172 | struct wcnss_ctrl *wcnss = container_of(work, struct wcnss_ctrl, download_nv_work); |
| 173 | struct wcnss_download_nv_req *req; |
| 174 | const struct firmware *fw; |
| 175 | const void *data; |
| 176 | ssize_t left; |
| 177 | int ret; |
| 178 | |
| 179 | req = kzalloc(sizeof(*req) + NV_FRAGMENT_SIZE, GFP_KERNEL); |
| 180 | if (!req) |
| 181 | return; |
| 182 | |
| 183 | ret = request_firmware(&fw, NVBIN_FILE, wcnss->dev); |
| 184 | if (ret) { |
| 185 | dev_err(wcnss->dev, "Failed to load nv file %s: %d\n", |
| 186 | NVBIN_FILE, ret); |
| 187 | goto free_req; |
| 188 | } |
| 189 | |
| 190 | data = fw->data; |
| 191 | left = fw->size; |
| 192 | |
| 193 | req->hdr.type = WCNSS_DOWNLOAD_NV_REQ; |
| 194 | req->hdr.len = sizeof(*req) + NV_FRAGMENT_SIZE; |
| 195 | |
| 196 | req->last = 0; |
| 197 | req->frag_size = NV_FRAGMENT_SIZE; |
| 198 | |
| 199 | req->seq = 0; |
| 200 | do { |
| 201 | if (left <= NV_FRAGMENT_SIZE) { |
| 202 | req->last = 1; |
| 203 | req->frag_size = left; |
| 204 | req->hdr.len = sizeof(*req) + left; |
| 205 | } |
| 206 | |
| 207 | memcpy(req->fragment, data, req->frag_size); |
| 208 | |
| 209 | ret = qcom_smd_send(wcnss->channel, req, req->hdr.len); |
| 210 | if (ret) { |
| 211 | dev_err(wcnss->dev, "failed to send smd packet\n"); |
| 212 | goto release_fw; |
| 213 | } |
| 214 | |
| 215 | /* Increment for next fragment */ |
| 216 | req->seq++; |
| 217 | |
| 218 | data += req->hdr.len; |
| 219 | left -= NV_FRAGMENT_SIZE; |
| 220 | } while (left > 0); |
| 221 | |
| 222 | ret = wait_for_completion_timeout(&wcnss->ack, WCNSS_REQUEST_TIMEOUT); |
| 223 | if (!ret) |
| 224 | dev_err(wcnss->dev, "timeout waiting for nv upload ack\n"); |
| 225 | else if (wcnss->ack_status != 1) |
| 226 | dev_err(wcnss->dev, "nv upload response failed err: %d\n", |
| 227 | wcnss->ack_status); |
| 228 | |
| 229 | release_fw: |
| 230 | release_firmware(fw); |
| 231 | free_req: |
| 232 | kfree(req); |
| 233 | } |
| 234 | |
| 235 | static int wcnss_ctrl_probe(struct qcom_smd_device *sdev) |
| 236 | { |
| 237 | struct wcnss_ctrl *wcnss; |
| 238 | |
| 239 | wcnss = devm_kzalloc(&sdev->dev, sizeof(*wcnss), GFP_KERNEL); |
| 240 | if (!wcnss) |
| 241 | return -ENOMEM; |
| 242 | |
| 243 | wcnss->dev = &sdev->dev; |
| 244 | wcnss->channel = sdev->channel; |
| 245 | |
| 246 | init_completion(&wcnss->ack); |
| 247 | INIT_WORK(&wcnss->download_nv_work, wcnss_download_nv); |
| 248 | |
Bjorn Andersson | b853cb9 | 2016-03-28 21:35:22 -0700 | [diff] [blame] | 249 | qcom_smd_set_drvdata(sdev->channel, wcnss); |
Bjorn Andersson | ea7a1f2 | 2015-09-21 10:52:55 -0700 | [diff] [blame] | 250 | |
| 251 | return wcnss_request_version(wcnss); |
| 252 | } |
| 253 | |
| 254 | static const struct qcom_smd_id wcnss_ctrl_smd_match[] = { |
| 255 | { .name = "WCNSS_CTRL" }, |
| 256 | {} |
| 257 | }; |
| 258 | |
| 259 | static struct qcom_smd_driver wcnss_ctrl_driver = { |
| 260 | .probe = wcnss_ctrl_probe, |
| 261 | .callback = wcnss_ctrl_smd_callback, |
| 262 | .smd_match_table = wcnss_ctrl_smd_match, |
| 263 | .driver = { |
| 264 | .name = "qcom_wcnss_ctrl", |
| 265 | .owner = THIS_MODULE, |
| 266 | }, |
| 267 | }; |
| 268 | |
| 269 | module_qcom_smd_driver(wcnss_ctrl_driver); |
| 270 | |
| 271 | MODULE_DESCRIPTION("Qualcomm WCNSS control driver"); |
| 272 | MODULE_LICENSE("GPL v2"); |