drivers/net/wireless/ath/ath10k/bmi.c

   1 /*
   2  * Copyright (c) 2005-2011 Atheros Communications Inc.
   3  * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include "bmi.h"
  19 #include "hif.h"
  20 #include "debug.h"
  21 #include "htc.h"
  22
  23 int ath10k_bmi_done(struct ath10k *ar)
  24 {
  25         struct bmi_cmd cmd;
  26         u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.done);
  27         int ret;
  28
  29         if (ar->bmi.done_sent) {
  30                 ath10k_dbg(ATH10K_DBG_CORE, "%s skipped\n", __func__);
  31                 return 0;
  32         }
  33
  34         ar->bmi.done_sent = true;
  35         cmd.id = __cpu_to_le32(BMI_DONE);
  36
  37         ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen, NULL, NULL);
  38         if (ret) {
  39                 ath10k_warn("unable to write to the device: %d\n", ret);
  40                 return ret;
  41         }
  42
  43         ath10k_dbg(ATH10K_DBG_CORE, "BMI done\n");
  44         return 0;
  45 }
  46
  47 int ath10k_bmi_get_target_info(struct ath10k *ar,
  48                                struct bmi_target_info *target_info)
  49 {
  50         struct bmi_cmd cmd;
  51         union bmi_resp resp;
  52         u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.get_target_info);
  53         u32 resplen = sizeof(resp.get_target_info);
  54         int ret;
  55
  56         if (ar->bmi.done_sent) {
  57                 ath10k_warn("BMI Get Target Info Command disallowed\n");
  58                 return -EBUSY;
  59         }
  60
  61         cmd.id = __cpu_to_le32(BMI_GET_TARGET_INFO);
  62
  63         ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen, &resp, &resplen);
  64         if (ret) {
  65                 ath10k_warn("unable to get target info from device\n");
  66                 return ret;
  67         }
  68
  69         if (resplen < sizeof(resp.get_target_info)) {
  70                 ath10k_warn("invalid get_target_info response length (%d)\n",
  71                             resplen);
  72                 return -EIO;
  73         }
  74
  75         target_info->version = __le32_to_cpu(resp.get_target_info.version);
  76         target_info->type    = __le32_to_cpu(resp.get_target_info.type);
  77         return 0;
  78 }
  79
  80 int ath10k_bmi_read_memory(struct ath10k *ar,
  81                            u32 address, void *buffer, u32 length)
  82 {
  83         struct bmi_cmd cmd;
  84         union bmi_resp resp;
  85         u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.read_mem);
  86         u32 rxlen;
  87         int ret;
  88
  89         if (ar->bmi.done_sent) {
  90                 ath10k_warn("command disallowed\n");
  91                 return -EBUSY;
  92         }
  93
  94         ath10k_dbg(ATH10K_DBG_CORE,
  95                    "%s: (device: 0x%p, address: 0x%x, length: %d)\n",
  96                    __func__, ar, address, length);
  97
  98         while (length) {
  99                 rxlen = min_t(u32, length, BMI_MAX_DATA_SIZE);
 100
 101                 cmd.id            = __cpu_to_le32(BMI_READ_MEMORY);
 102                 cmd.read_mem.addr = __cpu_to_le32(address);
 103                 cmd.read_mem.len  = __cpu_to_le32(rxlen);
 104
 105                 ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen,
 106                                                   &resp, &rxlen);
 107                 if (ret) {
 108                         ath10k_warn("unable to read from the device\n");
 109                         return ret;
 110                 }
 111
 112                 memcpy(buffer, resp.read_mem.payload, rxlen);
 113                 address += rxlen;
 114                 buffer  += rxlen;
 115                 length  -= rxlen;
 116         }
 117
 118         return 0;
 119 }
 120
 121 int ath10k_bmi_write_memory(struct ath10k *ar,
 122                             u32 address, const void *buffer, u32 length)
 123 {
 124         struct bmi_cmd cmd;
 125         u32 hdrlen = sizeof(cmd.id) + sizeof(cmd.write_mem);
 126         u32 txlen;
 127         int ret;
 128
 129         if (ar->bmi.done_sent) {
 130                 ath10k_warn("command disallowed\n");
 131                 return -EBUSY;
 132         }
 133
 134         ath10k_dbg(ATH10K_DBG_CORE,
 135                    "%s: (device: 0x%p, address: 0x%x, length: %d)\n",
 136                    __func__, ar, address, length);
 137
 138         while (length) {
 139                 txlen = min(length, BMI_MAX_DATA_SIZE - hdrlen);
 140
 141                 /* copy before roundup to avoid reading beyond buffer*/
 142                 memcpy(cmd.write_mem.payload, buffer, txlen);
 143                 txlen = roundup(txlen, 4);
 144
 145                 cmd.id             = __cpu_to_le32(BMI_WRITE_MEMORY);
 146                 cmd.write_mem.addr = __cpu_to_le32(address);
 147                 cmd.write_mem.len  = __cpu_to_le32(txlen);
 148
 149                 ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, hdrlen + txlen,
 150                                                   NULL, NULL);
 151                 if (ret) {
 152                         ath10k_warn("unable to write to the device\n");
 153                         return ret;
 154                 }
 155
 156                 /* fixup roundup() so `length` zeroes out for last chunk */
 157                 txlen = min(txlen, length);
 158
 159                 address += txlen;
 160                 buffer  += txlen;
 161                 length  -= txlen;
 162         }
 163
 164         return 0;
 165 }
 166
 167 int ath10k_bmi_execute(struct ath10k *ar, u32 address, u32 *param)
 168 {
 169         struct bmi_cmd cmd;
 170         union bmi_resp resp;
 171         u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.execute);
 172         u32 resplen = sizeof(resp.execute);
 173         int ret;
 174
 175         if (ar->bmi.done_sent) {
 176                 ath10k_warn("command disallowed\n");
 177                 return -EBUSY;
 178         }
 179
 180         ath10k_dbg(ATH10K_DBG_CORE,
 181                    "%s: (device: 0x%p, address: 0x%x, param: %d)\n",
 182                    __func__, ar, address, *param);
 183
 184         cmd.id            = __cpu_to_le32(BMI_EXECUTE);
 185         cmd.execute.addr  = __cpu_to_le32(address);
 186         cmd.execute.param = __cpu_to_le32(*param);
 187
 188         ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen, &resp, &resplen);
 189         if (ret) {
 190                 ath10k_warn("unable to read from the device\n");
 191                 return ret;
 192         }
 193
 194         if (resplen < sizeof(resp.execute)) {
 195                 ath10k_warn("invalid execute response length (%d)\n",
 196                             resplen);
 197                 return ret;
 198         }
 199
 200         *param = __le32_to_cpu(resp.execute.result);
 201         return 0;
 202 }
 203
 204 int ath10k_bmi_lz_data(struct ath10k *ar, const void *buffer, u32 length)
 205 {
 206         struct bmi_cmd cmd;
 207         u32 hdrlen = sizeof(cmd.id) + sizeof(cmd.lz_data);
 208         u32 txlen;
 209         int ret;
 210
 211         if (ar->bmi.done_sent) {
 212                 ath10k_warn("command disallowed\n");
 213                 return -EBUSY;
 214         }
 215
 216         while (length) {
 217                 txlen = min(length, BMI_MAX_DATA_SIZE - hdrlen);
 218
 219                 WARN_ON_ONCE(txlen & 3);
 220
 221                 cmd.id          = __cpu_to_le32(BMI_LZ_DATA);
 222                 cmd.lz_data.len = __cpu_to_le32(txlen);
 223                 memcpy(cmd.lz_data.payload, buffer, txlen);
 224
 225                 ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, hdrlen + txlen,
 226                                                   NULL, NULL);
 227                 if (ret) {
 228                         ath10k_warn("unable to write to the device\n");
 229                         return ret;
 230                 }
 231
 232                 buffer += txlen;
 233                 length -= txlen;
 234         }
 235
 236         return 0;
 237 }
 238
 239 int ath10k_bmi_lz_stream_start(struct ath10k *ar, u32 address)
 240 {
 241         struct bmi_cmd cmd;
 242         u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.lz_start);
 243         int ret;
 244
 245         if (ar->bmi.done_sent) {
 246                 ath10k_warn("command disallowed\n");
 247                 return -EBUSY;
 248         }
 249
 250         cmd.id            = __cpu_to_le32(BMI_LZ_STREAM_START);
 251         cmd.lz_start.addr = __cpu_to_le32(address);
 252
 253         ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen, NULL, NULL);
 254         if (ret) {
 255                 ath10k_warn("unable to Start LZ Stream to the device\n");
 256                 return ret;
 257         }
 258
 259         return 0;
 260 }
 261
 262 int ath10k_bmi_fast_download(struct ath10k *ar,
 263                              u32 address, const void *buffer, u32 length)
 264 {
 265         u8 trailer[4] = {};
 266         u32 head_len = rounddown(length, 4);
 267         u32 trailer_len = length - head_len;
 268         int ret;
 269
 270         ret = ath10k_bmi_lz_stream_start(ar, address);
 271         if (ret)
 272                 return ret;
 273
 274         /* copy the last word into a zero padded buffer */
 275         if (trailer_len > 0)
 276                 memcpy(trailer, buffer + head_len, trailer_len);
 277
 278         ret = ath10k_bmi_lz_data(ar, buffer, head_len);
 279         if (ret)
 280                 return ret;
 281
 282         if (trailer_len > 0)
 283                 ret = ath10k_bmi_lz_data(ar, trailer, 4);
 284
 285         if (ret != 0)
 286                 return ret;
 287
 288         /*
 289          * Close compressed stream and open a new (fake) one.
 290          * This serves mainly to flush Target caches.
 291          */
 292         ret = ath10k_bmi_lz_stream_start(ar, 0x00);
 293
 294         return ret;
 295 }