developer | 0f312e8 | 2022-11-01 12:31:52 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: ISC |
| 2 | /* |
| 3 | * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> |
| 4 | */ |
| 5 | |
| 6 | #include <linux/module.h> |
| 7 | #include <linux/firmware.h> |
| 8 | |
| 9 | #include "mt76x02.h" |
| 10 | #include "mt76x02_mcu.h" |
| 11 | #include "mt76x02_usb.h" |
| 12 | |
| 13 | #define MT_CMD_HDR_LEN 4 |
| 14 | |
| 15 | #define MT_FCE_DMA_ADDR 0x0230 |
| 16 | #define MT_FCE_DMA_LEN 0x0234 |
| 17 | |
| 18 | #define MT_TX_CPU_FROM_FCE_CPU_DESC_IDX 0x09a8 |
| 19 | |
| 20 | static void |
| 21 | mt76x02u_multiple_mcu_reads(struct mt76_dev *dev, u8 *data, int len) |
| 22 | { |
| 23 | struct mt76_usb *usb = &dev->usb; |
| 24 | int i; |
| 25 | |
| 26 | WARN_ON_ONCE(len / 8 != usb->mcu.rp_len); |
| 27 | |
| 28 | for (i = 0; i < usb->mcu.rp_len; i++) { |
| 29 | u32 reg = get_unaligned_le32(data + 8 * i) - usb->mcu.base; |
| 30 | u32 val = get_unaligned_le32(data + 8 * i + 4); |
| 31 | |
| 32 | WARN_ON_ONCE(usb->mcu.rp[i].reg != reg); |
| 33 | usb->mcu.rp[i].value = val; |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | static int mt76x02u_mcu_wait_resp(struct mt76_dev *dev, u8 seq) |
| 38 | { |
| 39 | struct mt76_usb *usb = &dev->usb; |
| 40 | u8 *data = usb->mcu.data; |
| 41 | int i, len, ret; |
| 42 | u32 rxfce; |
| 43 | |
| 44 | for (i = 0; i < 5; i++) { |
| 45 | ret = mt76u_bulk_msg(dev, data, MCU_RESP_URB_SIZE, &len, |
| 46 | 300, MT_EP_IN_CMD_RESP); |
| 47 | if (ret == -ETIMEDOUT) |
| 48 | continue; |
| 49 | if (ret) |
| 50 | goto out; |
| 51 | |
| 52 | if (usb->mcu.rp) |
| 53 | mt76x02u_multiple_mcu_reads(dev, data + 4, len - 8); |
| 54 | |
| 55 | rxfce = get_unaligned_le32(data); |
| 56 | if (seq == FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce) && |
| 57 | FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce) == EVT_CMD_DONE) |
| 58 | return 0; |
| 59 | |
| 60 | dev_err(dev->dev, "error: MCU resp evt:%lx seq:%hhx-%lx\n", |
| 61 | FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce), |
| 62 | seq, FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce)); |
| 63 | } |
| 64 | out: |
| 65 | dev_err(dev->dev, "error: %s failed with %d\n", __func__, ret); |
| 66 | return ret; |
| 67 | } |
| 68 | |
| 69 | static int |
| 70 | __mt76x02u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb, |
| 71 | int cmd, bool wait_resp) |
| 72 | { |
| 73 | u8 seq = 0; |
| 74 | u32 info; |
| 75 | int ret; |
| 76 | |
| 77 | if (test_bit(MT76_REMOVED, &dev->phy.state)) { |
| 78 | ret = 0; |
| 79 | goto out; |
| 80 | } |
| 81 | |
| 82 | if (wait_resp) { |
| 83 | seq = ++dev->mcu.msg_seq & 0xf; |
| 84 | if (!seq) |
| 85 | seq = ++dev->mcu.msg_seq & 0xf; |
| 86 | } |
| 87 | |
| 88 | info = FIELD_PREP(MT_MCU_MSG_CMD_SEQ, seq) | |
| 89 | FIELD_PREP(MT_MCU_MSG_CMD_TYPE, cmd) | |
| 90 | MT_MCU_MSG_TYPE_CMD; |
| 91 | ret = mt76x02u_skb_dma_info(skb, CPU_TX_PORT, info); |
| 92 | if (ret) |
| 93 | return ret; |
| 94 | |
| 95 | ret = mt76u_bulk_msg(dev, skb->data, skb->len, NULL, 500, |
| 96 | MT_EP_OUT_INBAND_CMD); |
| 97 | if (ret) |
| 98 | goto out; |
| 99 | |
| 100 | if (wait_resp) |
| 101 | ret = mt76x02u_mcu_wait_resp(dev, seq); |
| 102 | |
| 103 | out: |
| 104 | consume_skb(skb); |
| 105 | |
| 106 | return ret; |
| 107 | } |
| 108 | |
| 109 | static int |
| 110 | mt76x02u_mcu_send_msg(struct mt76_dev *dev, int cmd, const void *data, |
| 111 | int len, bool wait_resp) |
| 112 | { |
| 113 | struct sk_buff *skb; |
| 114 | int err; |
| 115 | |
| 116 | skb = mt76_mcu_msg_alloc(dev, data, len); |
| 117 | if (!skb) |
| 118 | return -ENOMEM; |
| 119 | |
| 120 | mutex_lock(&dev->mcu.mutex); |
| 121 | err = __mt76x02u_mcu_send_msg(dev, skb, cmd, wait_resp); |
| 122 | mutex_unlock(&dev->mcu.mutex); |
| 123 | |
| 124 | return err; |
| 125 | } |
| 126 | |
| 127 | static inline void skb_put_le32(struct sk_buff *skb, u32 val) |
| 128 | { |
| 129 | put_unaligned_le32(val, skb_put(skb, 4)); |
| 130 | } |
| 131 | |
| 132 | static int |
| 133 | mt76x02u_mcu_wr_rp(struct mt76_dev *dev, u32 base, |
| 134 | const struct mt76_reg_pair *data, int n) |
| 135 | { |
| 136 | const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8; |
| 137 | const int CMD_RANDOM_WRITE = 12; |
| 138 | struct sk_buff *skb; |
| 139 | int cnt, i, ret; |
| 140 | |
| 141 | if (!n) |
| 142 | return 0; |
| 143 | |
| 144 | cnt = min(max_vals_per_cmd, n); |
| 145 | |
| 146 | skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL); |
| 147 | if (!skb) |
| 148 | return -ENOMEM; |
| 149 | skb_reserve(skb, MT_DMA_HDR_LEN); |
| 150 | |
| 151 | for (i = 0; i < cnt; i++) { |
| 152 | skb_put_le32(skb, base + data[i].reg); |
| 153 | skb_put_le32(skb, data[i].value); |
| 154 | } |
| 155 | |
| 156 | mutex_lock(&dev->mcu.mutex); |
| 157 | ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_WRITE, cnt == n); |
| 158 | mutex_unlock(&dev->mcu.mutex); |
| 159 | if (ret) |
| 160 | return ret; |
| 161 | |
| 162 | return mt76x02u_mcu_wr_rp(dev, base, data + cnt, n - cnt); |
| 163 | } |
| 164 | |
| 165 | static int |
| 166 | mt76x02u_mcu_rd_rp(struct mt76_dev *dev, u32 base, |
| 167 | struct mt76_reg_pair *data, int n) |
| 168 | { |
| 169 | const int CMD_RANDOM_READ = 10; |
| 170 | const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8; |
| 171 | struct mt76_usb *usb = &dev->usb; |
| 172 | struct sk_buff *skb; |
| 173 | int cnt, i, ret; |
| 174 | |
| 175 | if (!n) |
| 176 | return 0; |
| 177 | |
| 178 | cnt = min(max_vals_per_cmd, n); |
| 179 | if (cnt != n) |
| 180 | return -EINVAL; |
| 181 | |
| 182 | skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL); |
| 183 | if (!skb) |
| 184 | return -ENOMEM; |
| 185 | skb_reserve(skb, MT_DMA_HDR_LEN); |
| 186 | |
| 187 | for (i = 0; i < cnt; i++) { |
| 188 | skb_put_le32(skb, base + data[i].reg); |
| 189 | skb_put_le32(skb, data[i].value); |
| 190 | } |
| 191 | |
| 192 | mutex_lock(&dev->mcu.mutex); |
| 193 | |
| 194 | usb->mcu.rp = data; |
| 195 | usb->mcu.rp_len = n; |
| 196 | usb->mcu.base = base; |
| 197 | |
| 198 | ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_READ, true); |
| 199 | |
| 200 | usb->mcu.rp = NULL; |
| 201 | |
| 202 | mutex_unlock(&dev->mcu.mutex); |
| 203 | |
| 204 | return ret; |
| 205 | } |
| 206 | |
| 207 | void mt76x02u_mcu_fw_reset(struct mt76x02_dev *dev) |
| 208 | { |
| 209 | mt76u_vendor_request(&dev->mt76, MT_VEND_DEV_MODE, |
| 210 | USB_DIR_OUT | USB_TYPE_VENDOR, |
| 211 | 0x1, 0, NULL, 0); |
| 212 | } |
| 213 | EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_reset); |
| 214 | |
| 215 | static int |
| 216 | __mt76x02u_mcu_fw_send_data(struct mt76x02_dev *dev, u8 *data, |
| 217 | const void *fw_data, int len, u32 dst_addr) |
| 218 | { |
| 219 | __le32 info; |
| 220 | u32 val; |
| 221 | int err, data_len; |
| 222 | |
| 223 | info = cpu_to_le32(FIELD_PREP(MT_MCU_MSG_PORT, CPU_TX_PORT) | |
| 224 | FIELD_PREP(MT_MCU_MSG_LEN, len) | |
| 225 | MT_MCU_MSG_TYPE_CMD); |
| 226 | |
| 227 | memcpy(data, &info, sizeof(info)); |
| 228 | memcpy(data + sizeof(info), fw_data, len); |
| 229 | memset(data + sizeof(info) + len, 0, 4); |
| 230 | |
| 231 | mt76u_single_wr(&dev->mt76, MT_VEND_WRITE_FCE, |
| 232 | MT_FCE_DMA_ADDR, dst_addr); |
| 233 | len = roundup(len, 4); |
| 234 | mt76u_single_wr(&dev->mt76, MT_VEND_WRITE_FCE, |
| 235 | MT_FCE_DMA_LEN, len << 16); |
| 236 | |
| 237 | data_len = MT_CMD_HDR_LEN + len + sizeof(info); |
| 238 | |
| 239 | err = mt76u_bulk_msg(&dev->mt76, data, data_len, NULL, 1000, |
| 240 | MT_EP_OUT_INBAND_CMD); |
| 241 | if (err) { |
| 242 | dev_err(dev->mt76.dev, "firmware upload failed: %d\n", err); |
| 243 | return err; |
| 244 | } |
| 245 | |
| 246 | val = mt76_rr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX); |
| 247 | val++; |
| 248 | mt76_wr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX, val); |
| 249 | |
| 250 | return 0; |
| 251 | } |
| 252 | |
| 253 | int mt76x02u_mcu_fw_send_data(struct mt76x02_dev *dev, const void *data, |
| 254 | int data_len, u32 max_payload, u32 offset) |
| 255 | { |
| 256 | int len, err = 0, pos = 0, max_len = max_payload - 8; |
| 257 | u8 *buf; |
| 258 | |
| 259 | buf = kmalloc(max_payload, GFP_KERNEL); |
| 260 | if (!buf) |
| 261 | return -ENOMEM; |
| 262 | |
| 263 | while (data_len > 0) { |
| 264 | len = min_t(int, data_len, max_len); |
| 265 | err = __mt76x02u_mcu_fw_send_data(dev, buf, data + pos, |
| 266 | len, offset + pos); |
| 267 | if (err < 0) |
| 268 | break; |
| 269 | |
| 270 | data_len -= len; |
| 271 | pos += len; |
| 272 | usleep_range(5000, 10000); |
| 273 | } |
| 274 | kfree(buf); |
| 275 | |
| 276 | return err; |
| 277 | } |
| 278 | EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_send_data); |
| 279 | |
| 280 | void mt76x02u_init_mcu(struct mt76_dev *dev) |
| 281 | { |
| 282 | static const struct mt76_mcu_ops mt76x02u_mcu_ops = { |
| 283 | .headroom = MT_CMD_HDR_LEN, |
| 284 | .tailroom = 8, |
| 285 | .mcu_send_msg = mt76x02u_mcu_send_msg, |
| 286 | .mcu_parse_response = mt76x02_mcu_parse_response, |
| 287 | .mcu_wr_rp = mt76x02u_mcu_wr_rp, |
| 288 | .mcu_rd_rp = mt76x02u_mcu_rd_rp, |
| 289 | }; |
| 290 | |
| 291 | dev->mcu_ops = &mt76x02u_mcu_ops; |
| 292 | } |
| 293 | EXPORT_SYMBOL_GPL(mt76x02u_init_mcu); |
| 294 | |
| 295 | MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>"); |
| 296 | MODULE_LICENSE("Dual BSD/GPL"); |