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

   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 #ifndef _BMI_H_
  19 #define _BMI_H_
  20
  21 #include "core.h"
  22
  23 /*
  24  * Bootloader Messaging Interface (BMI)
  25  *
  26  * BMI is a very simple messaging interface used during initialization
  27  * to read memory, write memory, execute code, and to define an
  28  * application entry PC.
  29  *
  30  * It is used to download an application to QCA988x, to provide
  31  * patches to code that is already resident on QCA988x, and generally
  32  * to examine and modify state.  The Host has an opportunity to use
  33  * BMI only once during bootup.  Once the Host issues a BMI_DONE
  34  * command, this opportunity ends.
  35  *
  36  * The Host writes BMI requests to mailbox0, and reads BMI responses
  37  * from mailbox0.   BMI requests all begin with a command
  38  * (see below for specific commands), and are followed by
  39  * command-specific data.
  40  *
  41  * Flow control:
  42  * The Host can only issue a command once the Target gives it a
  43  * "BMI Command Credit", using AR8K Counter #4.  As soon as the
  44  * Target has completed a command, it issues another BMI Command
  45  * Credit (so the Host can issue the next command).
  46  *
  47  * BMI handles all required Target-side cache flushing.
  48  */
  49
  50 /* Maximum data size used for BMI transfers */
  51 #define BMI_MAX_DATA_SIZE       256
  52
  53 /* len = cmd + addr + length */
  54 #define BMI_MAX_CMDBUF_SIZE (BMI_MAX_DATA_SIZE + \
  55                         sizeof(u32) + \
  56                         sizeof(u32) + \
  57                         sizeof(u32))
  58
  59 /* BMI Commands */
  60
  61 enum bmi_cmd_id {
  62         BMI_NO_COMMAND          = 0,
  63         BMI_DONE                = 1,
  64         BMI_READ_MEMORY         = 2,
  65         BMI_WRITE_MEMORY        = 3,
  66         BMI_EXECUTE             = 4,
  67         BMI_SET_APP_START       = 5,
  68         BMI_READ_SOC_REGISTER   = 6,
  69         BMI_READ_SOC_WORD       = 6,
  70         BMI_WRITE_SOC_REGISTER  = 7,
  71         BMI_WRITE_SOC_WORD      = 7,
  72         BMI_GET_TARGET_ID       = 8,
  73         BMI_GET_TARGET_INFO     = 8,
  74         BMI_ROMPATCH_INSTALL    = 9,
  75         BMI_ROMPATCH_UNINSTALL  = 10,
  76         BMI_ROMPATCH_ACTIVATE   = 11,
  77         BMI_ROMPATCH_DEACTIVATE = 12,
  78         BMI_LZ_STREAM_START     = 13, /* should be followed by LZ_DATA */
  79         BMI_LZ_DATA             = 14,
  80         BMI_NVRAM_PROCESS       = 15,
  81 };
  82
  83 #define BMI_NVRAM_SEG_NAME_SZ 16
  84
  85 struct bmi_cmd {
  86         __le32 id; /* enum bmi_cmd_id */
  87         union {
  88                 struct {
  89                 } done;
  90                 struct {
  91                         __le32 addr;
  92                         __le32 len;
  93                 } read_mem;
  94                 struct {
  95                         __le32 addr;
  96                         __le32 len;
  97                         u8 payload[0];
  98                 } write_mem;
  99                 struct {
 100                         __le32 addr;
 101                         __le32 param;
 102                 } execute;
 103                 struct {
 104                         __le32 addr;
 105                 } set_app_start;
 106                 struct {
 107                         __le32 addr;
 108                 } read_soc_reg;
 109                 struct {
 110                         __le32 addr;
 111                         __le32 value;
 112                 } write_soc_reg;
 113                 struct {
 114                 } get_target_info;
 115                 struct {
 116                         __le32 rom_addr;
 117                         __le32 ram_addr; /* or value */
 118                         __le32 size;
 119                         __le32 activate; /* 0=install, but dont activate */
 120                 } rompatch_install;
 121                 struct {
 122                         __le32 patch_id;
 123                 } rompatch_uninstall;
 124                 struct {
 125                         __le32 count;
 126                         __le32 patch_ids[0]; /* length of @count */
 127                 } rompatch_activate;
 128                 struct {
 129                         __le32 count;
 130                         __le32 patch_ids[0]; /* length of @count */
 131                 } rompatch_deactivate;
 132                 struct {
 133                         __le32 addr;
 134                 } lz_start;
 135                 struct {
 136                         __le32 len; /* max BMI_MAX_DATA_SIZE */
 137                         u8 payload[0]; /* length of @len */
 138                 } lz_data;
 139                 struct {
 140                         u8 name[BMI_NVRAM_SEG_NAME_SZ];
 141                 } nvram_process;
 142                 u8 payload[BMI_MAX_CMDBUF_SIZE];
 143         };
 144 } __packed;
 145
 146 union bmi_resp {
 147         struct {
 148                 u8 payload[0];
 149         } read_mem;
 150         struct {
 151                 __le32 result;
 152         } execute;
 153         struct {
 154                 __le32 value;
 155         } read_soc_reg;
 156         struct {
 157                 __le32 len;
 158                 __le32 version;
 159                 __le32 type;
 160         } get_target_info;
 161         struct {
 162                 __le32 patch_id;
 163         } rompatch_install;
 164         struct {
 165                 __le32 patch_id;
 166         } rompatch_uninstall;
 167         struct {
 168                 /* 0 = nothing executed
 169                  * otherwise = NVRAM segment return value */
 170                 __le32 result;
 171         } nvram_process;
 172         u8 payload[BMI_MAX_CMDBUF_SIZE];
 173 } __packed;
 174
 175 struct bmi_target_info {
 176         u32 version;
 177         u32 type;
 178 };
 179
 180
 181 /* in msec */
 182 #define BMI_COMMUNICATION_TIMEOUT_HZ (1*HZ)
 183
 184 #define BMI_CE_NUM_TO_TARG 0
 185 #define BMI_CE_NUM_TO_HOST 1
 186
 187 void ath10k_bmi_start(struct ath10k *ar);
 188 int ath10k_bmi_done(struct ath10k *ar);
 189 int ath10k_bmi_get_target_info(struct ath10k *ar,
 190                                struct bmi_target_info *target_info);
 191 int ath10k_bmi_read_memory(struct ath10k *ar, u32 address,
 192                            void *buffer, u32 length);
 193 int ath10k_bmi_write_memory(struct ath10k *ar, u32 address,
 194                             const void *buffer, u32 length);
 195
 196 #define ath10k_bmi_read32(ar, item, val)                                \
 197         ({                                                              \
 198                 int ret;                                                \
 199                 u32 addr;                                               \
 200                 __le32 tmp;                                             \
 201                                                                         \
 202                 addr = host_interest_item_address(HI_ITEM(item));       \
 203                 ret = ath10k_bmi_read_memory(ar, addr, (u8 *)&tmp, 4); \
 204                 if (!ret)                                               \
 205                         *val = __le32_to_cpu(tmp);                      \
 206                 ret;                                                    \
 207          })
 208
 209 #define ath10k_bmi_write32(ar, item, val)                               \
 210         ({                                                              \
 211                 int ret;                                                \
 212                 u32 address;                                            \
 213                 __le32 v = __cpu_to_le32(val);                          \
 214                                                                         \
 215                 address = host_interest_item_address(HI_ITEM(item));    \
 216                 ret = ath10k_bmi_write_memory(ar, address,              \
 217                                               (u8 *)&v, sizeof(v));     \
 218                 ret;                                                    \
 219         })
 220
 221 int ath10k_bmi_execute(struct ath10k *ar, u32 address, u32 param, u32 *result);
 222 int ath10k_bmi_lz_stream_start(struct ath10k *ar, u32 address);
 223 int ath10k_bmi_lz_data(struct ath10k *ar, const void *buffer, u32 length);
 224 int ath10k_bmi_fast_download(struct ath10k *ar, u32 address,
 225                              const void *buffer, u32 length);
 226 #endif /* _BMI_H_ */