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 /* in msec */ 181 #define BMI_COMMUNICATION_TIMEOUT_HZ (2 * HZ) 182 183 #define BMI_CE_NUM_TO_TARG 0 184 #define BMI_CE_NUM_TO_HOST 1 185 186 void ath10k_bmi_start(struct ath10k *ar); 187 int ath10k_bmi_done(struct ath10k *ar); 188 int ath10k_bmi_get_target_info(struct ath10k *ar, 189 struct bmi_target_info *target_info); 190 int ath10k_bmi_read_memory(struct ath10k *ar, u32 address, 191 void *buffer, u32 length); 192 int ath10k_bmi_write_memory(struct ath10k *ar, u32 address, 193 const void *buffer, u32 length); 194 195 #define ath10k_bmi_read32(ar, item, val) \ 196 ({ \ 197 int ret; \ 198 u32 addr; \ 199 __le32 tmp; \ 200 \ 201 addr = host_interest_item_address(HI_ITEM(item)); \ 202 ret = ath10k_bmi_read_memory(ar, addr, (u8 *)&tmp, 4); \ 203 if (!ret) \ 204 *val = __le32_to_cpu(tmp); \ 205 ret; \ 206 }) 207 208 #define ath10k_bmi_write32(ar, item, val) \ 209 ({ \ 210 int ret; \ 211 u32 address; \ 212 __le32 v = __cpu_to_le32(val); \ 213 \ 214 address = host_interest_item_address(HI_ITEM(item)); \ 215 ret = ath10k_bmi_write_memory(ar, address, \ 216 (u8 *)&v, sizeof(v)); \ 217 ret; \ 218 }) 219 220 int ath10k_bmi_execute(struct ath10k *ar, u32 address, u32 param, u32 *result); 221 int ath10k_bmi_lz_stream_start(struct ath10k *ar, u32 address); 222 int ath10k_bmi_lz_data(struct ath10k *ar, const void *buffer, u32 length); 223 int ath10k_bmi_fast_download(struct ath10k *ar, u32 address, 224 const void *buffer, u32 length); 225 #endif /* _BMI_H_ */ 226