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mt76/mt7603/mcu.c
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Felix Fietkau 33f29d2345 wifi: mt76: relicense to BSD-3-Clause-Clear 
MediaTek has asked to switch from the ISC license to BSD-3-Clause-Clear,
in order to improve clarity and the legal integrity of the code.

The BSD-3-Clause license includes the "no endorsement" clause, which is
important for protecting the reputation of the original authors and
contributors by preventing unauthorized use of their names for endorsement
purposes.

This clause is absent in the BSD-2-Clause license, which is more permissive
but lacks this specific protection.

This change also cleans up the license of some Kconfig/Makefile files,
which were accidentally marked as GPL.

The GPL 2.0 remains in use on mt76x0, as well as two source files in mt7615
for which the license situation still needs to be clarified.

Signed-off-by: Felix Fietkau <[email protected]>
2025-10-13 11:11:19 +02:00

433 lines
10 KiB
C
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// SPDX-License-Identifier: BSD-3-Clause-Clear
#include <linux/firmware.h>
#include "mt7603.h"
#include "mcu.h"
#include "eeprom.h"
#define MCU_SKB_RESERVE 8
struct mt7603_fw_trailer {
char fw_ver[10];
char build_date[15];
__le32 dl_len;
} __packed;
static int
mt7603_mcu_parse_response(struct mt76_dev *mdev, int cmd,
struct sk_buff *skb, int seq)
{
struct mt7603_dev *dev = container_of(mdev, struct mt7603_dev, mt76);
struct mt7603_mcu_rxd *rxd;
if (!skb) {
dev_err(mdev->dev, "MCU message %02x (seq %d) timed out\n",
abs(cmd), seq);
dev->mcu_hang = MT7603_WATCHDOG_TIMEOUT;
return -ETIMEDOUT;
}
rxd = (struct mt7603_mcu_rxd *)skb->data;
if (seq != rxd->seq)
return -EAGAIN;
return 0;
}
static int
mt7603_mcu_skb_send_msg(struct mt76_dev *mdev, struct sk_buff *skb,
int cmd, int *wait_seq)
{
struct mt7603_dev *dev = container_of(mdev, struct mt7603_dev, mt76);
int hdrlen = dev->mcu_running ? sizeof(struct mt7603_mcu_txd) : 12;
struct mt7603_mcu_txd *txd;
u8 seq;
mdev->mcu.timeout = 3 * HZ;
seq = ++mdev->mcu.msg_seq & 0xf;
if (!seq)
seq = ++mdev->mcu.msg_seq & 0xf;
txd = (struct mt7603_mcu_txd *)skb_push(skb, hdrlen);
txd->len = cpu_to_le16(skb->len);
if (cmd == -MCU_CMD_FW_SCATTER)
txd->pq_id = cpu_to_le16(MCU_PORT_QUEUE_FW);
else
txd->pq_id = cpu_to_le16(MCU_PORT_QUEUE);
txd->pkt_type = MCU_PKT_ID;
txd->seq = seq;
if (cmd < 0) {
txd->cid = -cmd;
txd->set_query = MCU_Q_NA;
} else {
txd->cid = MCU_CMD_EXT_CID;
txd->ext_cid = cmd;
txd->set_query = MCU_Q_SET;
txd->ext_cid_ack = 1;
}
if (wait_seq)
*wait_seq = seq;
return mt76_tx_queue_skb_raw(dev, mdev->q_mcu[MT_MCUQ_WM], skb, 0);
}
static int
mt7603_mcu_init_download(struct mt7603_dev *dev, u32 addr, u32 len)
{
struct {
__le32 addr;
__le32 len;
__le32 mode;
} req = {
.addr = cpu_to_le32(addr),
.len = cpu_to_le32(len),
.mode = cpu_to_le32(BIT(31)),
};
return mt76_mcu_send_msg(&dev->mt76, -MCU_CMD_TARGET_ADDRESS_LEN_REQ,
&req, sizeof(req), true);
}
static int
mt7603_mcu_start_firmware(struct mt7603_dev *dev, u32 addr)
{
struct {
__le32 override;
__le32 addr;
} req = {
.override = cpu_to_le32(addr ? 1 : 0),
.addr = cpu_to_le32(addr),
};
return mt76_mcu_send_msg(&dev->mt76, -MCU_CMD_FW_START_REQ, &req,
sizeof(req), true);
}
static int
mt7603_mcu_restart(struct mt76_dev *dev)
{
return mt76_mcu_send_msg(dev, -MCU_CMD_RESTART_DL_REQ, NULL, 0, true);
}
static int mt7603_load_firmware(struct mt7603_dev *dev)
{
const struct firmware *fw;
const struct mt7603_fw_trailer *hdr;
const char *firmware;
int dl_len;
u32 addr, val;
int ret;
if (is_mt7628(dev)) {
if (mt76xx_rev(dev) == MT7628_REV_E1)
firmware = MT7628_FIRMWARE_E1;
else
firmware = MT7628_FIRMWARE_E2;
} else {
if (mt76xx_rev(dev) < MT7603_REV_E2)
firmware = MT7603_FIRMWARE_E1;
else
firmware = MT7603_FIRMWARE_E2;
}
ret = request_firmware(&fw, firmware, dev->mt76.dev);
if (ret)
return ret;
if (!fw || !fw->data || fw->size < sizeof(*hdr)) {
dev_err(dev->mt76.dev, "Invalid firmware\n");
ret = -EINVAL;
goto out;
}
hdr = (const struct mt7603_fw_trailer *)(fw->data + fw->size -
sizeof(*hdr));
dev_info(dev->mt76.dev, "Firmware Version: %.10s\n", hdr->fw_ver);
dev_info(dev->mt76.dev, "Build Time: %.15s\n", hdr->build_date);
addr = mt7603_reg_map(dev, 0x50012498);
mt76_wr(dev, addr, 0x5);
mt76_wr(dev, addr, 0x5);
udelay(1);
/* switch to bypass mode */
mt76_rmw(dev, MT_SCH_4, MT_SCH_4_FORCE_QID,
MT_SCH_4_BYPASS | FIELD_PREP(MT_SCH_4_FORCE_QID, 5));
val = mt76_rr(dev, MT_TOP_MISC2);
if (val & BIT(1)) {
dev_info(dev->mt76.dev, "Firmware already running...\n");
goto running;
}
if (!mt76_poll_msec(dev, MT_TOP_MISC2, BIT(0) | BIT(1), BIT(0), 500)) {
dev_err(dev->mt76.dev, "Timeout waiting for ROM code to become ready\n");
ret = -EIO;
goto out;
}
dl_len = le32_to_cpu(hdr->dl_len) + 4;
ret = mt7603_mcu_init_download(dev, MCU_FIRMWARE_ADDRESS, dl_len);
if (ret) {
dev_err(dev->mt76.dev, "Download request failed\n");
goto out;
}
ret = mt76_mcu_send_firmware(&dev->mt76, -MCU_CMD_FW_SCATTER,
fw->data, dl_len);
if (ret) {
dev_err(dev->mt76.dev, "Failed to send firmware to device\n");
goto out;
}
ret = mt7603_mcu_start_firmware(dev, MCU_FIRMWARE_ADDRESS);
if (ret) {
dev_err(dev->mt76.dev, "Failed to start firmware\n");
goto out;
}
if (!mt76_poll_msec(dev, MT_TOP_MISC2, BIT(1), BIT(1), 500)) {
dev_err(dev->mt76.dev, "Timeout waiting for firmware to initialize\n");
ret = -EIO;
goto out;
}
running:
mt76_clear(dev, MT_SCH_4, MT_SCH_4_FORCE_QID | MT_SCH_4_BYPASS);
mt76_set(dev, MT_SCH_4, BIT(8));
mt76_clear(dev, MT_SCH_4, BIT(8));
dev->mcu_running = true;
snprintf(dev->mt76.hw->wiphy->fw_version,
sizeof(dev->mt76.hw->wiphy->fw_version),
"%.10s-%.15s", hdr->fw_ver, hdr->build_date);
dev_info(dev->mt76.dev, "firmware init done\n");
out:
release_firmware(fw);
return ret;
}
int mt7603_mcu_init(struct mt7603_dev *dev)
{
static const struct mt76_mcu_ops mt7603_mcu_ops = {
.headroom = sizeof(struct mt7603_mcu_txd),
.mcu_skb_send_msg = mt7603_mcu_skb_send_msg,
.mcu_parse_response = mt7603_mcu_parse_response,
};
dev->mt76.mcu_ops = &mt7603_mcu_ops;
return mt7603_load_firmware(dev);
}
void mt7603_mcu_exit(struct mt7603_dev *dev)
{
mt7603_mcu_restart(&dev->mt76);
skb_queue_purge(&dev->mt76.mcu.res_q);
}
int mt7603_mcu_set_eeprom(struct mt7603_dev *dev)
{
static const u16 req_fields[] = {
#define WORD(_start) \
_start, \
_start + 1
#define GROUP_2G(_start) \
WORD(_start), \
WORD(_start + 2), \
WORD(_start + 4)
MT_EE_NIC_CONF_0 + 1,
WORD(MT_EE_NIC_CONF_1),
MT_EE_WIFI_RF_SETTING,
MT_EE_TX_POWER_DELTA_BW40,
MT_EE_TX_POWER_DELTA_BW80 + 1,
MT_EE_TX_POWER_EXT_PA_5G,
MT_EE_TEMP_SENSOR_CAL,
GROUP_2G(MT_EE_TX_POWER_0_START_2G),
GROUP_2G(MT_EE_TX_POWER_1_START_2G),
WORD(MT_EE_TX_POWER_CCK),
WORD(MT_EE_TX_POWER_OFDM_2G_6M),
WORD(MT_EE_TX_POWER_OFDM_2G_24M),
WORD(MT_EE_TX_POWER_OFDM_2G_54M),
WORD(MT_EE_TX_POWER_HT_BPSK_QPSK),
WORD(MT_EE_TX_POWER_HT_16_64_QAM),
WORD(MT_EE_TX_POWER_HT_64_QAM),
MT_EE_ELAN_RX_MODE_GAIN,
MT_EE_ELAN_RX_MODE_NF,
MT_EE_ELAN_RX_MODE_P1DB,
MT_EE_ELAN_BYPASS_MODE_GAIN,
MT_EE_ELAN_BYPASS_MODE_NF,
MT_EE_ELAN_BYPASS_MODE_P1DB,
WORD(MT_EE_STEP_NUM_NEG_6_7),
WORD(MT_EE_STEP_NUM_NEG_4_5),
WORD(MT_EE_STEP_NUM_NEG_2_3),
WORD(MT_EE_STEP_NUM_NEG_0_1),
WORD(MT_EE_REF_STEP_24G),
WORD(MT_EE_STEP_NUM_PLUS_1_2),
WORD(MT_EE_STEP_NUM_PLUS_3_4),
WORD(MT_EE_STEP_NUM_PLUS_5_6),
MT_EE_STEP_NUM_PLUS_7,
MT_EE_XTAL_FREQ_OFFSET,
MT_EE_XTAL_TRIM_2_COMP,
MT_EE_XTAL_TRIM_3_COMP,
MT_EE_XTAL_WF_RFCAL,
/* unknown fields below */
WORD(0x24),
0x34,
0x39,
0x3b,
WORD(0x42),
WORD(0x9e),
0xf2,
WORD(0xf8),
0xfa,
0x12e,
WORD(0x130), WORD(0x132), WORD(0x134), WORD(0x136),
WORD(0x138), WORD(0x13a), WORD(0x13c), WORD(0x13e),
#undef GROUP_2G
#undef WORD
};
struct req_data {
__le16 addr;
u8 val;
u8 pad;
} __packed;
struct {
u8 buffer_mode;
u8 len;
u8 pad[2];
} req_hdr = {
.buffer_mode = 1,
.len = ARRAY_SIZE(req_fields) - 1,
};
const int size = 0xff * sizeof(struct req_data);
u8 *req, *eep = (u8 *)dev->mt76.eeprom.data;
int i, ret, len = sizeof(req_hdr) + size;
struct req_data *data;
BUILD_BUG_ON(ARRAY_SIZE(req_fields) * sizeof(*data) > size);
req = kmalloc(len, GFP_KERNEL);
if (!req)
return -ENOMEM;
memcpy(req, &req_hdr, sizeof(req_hdr));
data = (struct req_data *)(req + sizeof(req_hdr));
memset(data, 0, size);
for (i = 0; i < ARRAY_SIZE(req_fields); i++) {
data[i].addr = cpu_to_le16(req_fields[i]);
data[i].val = eep[req_fields[i]];
}
ret = mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_EFUSE_BUFFER_MODE,
req, len, true);
kfree(req);
return ret;
}
static int mt7603_mcu_set_tx_power(struct mt7603_dev *dev)
{
struct {
u8 center_channel;
u8 tssi;
u8 temp_comp;
u8 target_power[2];
u8 rate_power_delta[14];
u8 bw_power_delta;
u8 ch_power_delta[6];
u8 temp_comp_power[17];
u8 reserved;
} req = {
.center_channel = dev->mphy.chandef.chan->hw_value,
#define EEP_VAL(n) ((u8 *)dev->mt76.eeprom.data)[n]
.tssi = EEP_VAL(MT_EE_NIC_CONF_1 + 1),
.temp_comp = EEP_VAL(MT_EE_NIC_CONF_1),
.target_power = {
EEP_VAL(MT_EE_TX_POWER_0_START_2G + 2),
EEP_VAL(MT_EE_TX_POWER_1_START_2G + 2)
},
.bw_power_delta = EEP_VAL(MT_EE_TX_POWER_DELTA_BW40),
.ch_power_delta = {
EEP_VAL(MT_EE_TX_POWER_0_START_2G + 3),
EEP_VAL(MT_EE_TX_POWER_0_START_2G + 4),
EEP_VAL(MT_EE_TX_POWER_0_START_2G + 5),
EEP_VAL(MT_EE_TX_POWER_1_START_2G + 3),
EEP_VAL(MT_EE_TX_POWER_1_START_2G + 4),
EEP_VAL(MT_EE_TX_POWER_1_START_2G + 5)
},
#undef EEP_VAL
};
u8 *eep = (u8 *)dev->mt76.eeprom.data;
memcpy(req.rate_power_delta, eep + MT_EE_TX_POWER_CCK,
sizeof(req.rate_power_delta));
memcpy(req.temp_comp_power, eep + MT_EE_STEP_NUM_NEG_6_7,
sizeof(req.temp_comp_power));
return mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_SET_TX_POWER_CTRL,
&req, sizeof(req), true);
}
int mt7603_mcu_set_channel(struct mt7603_dev *dev)
{
struct cfg80211_chan_def *chandef = &dev->mphy.chandef;
struct ieee80211_hw *hw = mt76_hw(dev);
int n_chains = hweight8(dev->mphy.antenna_mask);
struct {
u8 control_chan;
u8 center_chan;
u8 bw;
u8 tx_streams;
u8 rx_streams;
u8 _res0[7];
u8 txpower[21];
u8 _res1[3];
} req = {
.control_chan = chandef->chan->hw_value,
.center_chan = chandef->chan->hw_value,
.bw = MT_BW_20,
.tx_streams = n_chains,
.rx_streams = n_chains,
};
s8 tx_power = hw->conf.power_level * 2;
int i, ret;
if (dev->mphy.chandef.width == NL80211_CHAN_WIDTH_40) {
req.bw = MT_BW_40;
if (chandef->center_freq1 > chandef->chan->center_freq)
req.center_chan += 2;
else
req.center_chan -= 2;
}
tx_power = mt76_get_sar_power(&dev->mphy, chandef->chan, tx_power);
if (dev->mphy.antenna_mask == 3)
tx_power -= 6;
tx_power = min(tx_power, dev->tx_power_limit);
dev->mphy.txpower_cur = tx_power;
for (i = 0; i < ARRAY_SIZE(req.txpower); i++)
req.txpower[i] = tx_power;
ret = mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_CHANNEL_SWITCH, &req,
sizeof(req), true);
if (ret)
return ret;
return mt7603_mcu_set_tx_power(dev);
}
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