diff options
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt76x0/eeprom.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt76x0/eeprom.c | 445 |
1 files changed, 445 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt76x0/eeprom.c new file mode 100644 index 000000000000..36da1e6bc21a --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt76x0/eeprom.c @@ -0,0 +1,445 @@ +/* + * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org> + * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl> + * Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/of.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> +#include <linux/etherdevice.h> +#include <asm/unaligned.h> +#include "mt76x0.h" +#include "eeprom.h" + +static bool +field_valid(u8 val) +{ + return val != 0xff; +} + +static s8 +field_validate(u8 val) +{ + if (!field_valid(val)) + return 0; + + return val; +} + +static inline int +sign_extend(u32 val, unsigned int size) +{ + bool sign = val & BIT(size - 1); + + val &= BIT(size - 1) - 1; + + return sign ? val : -val; +} + +static int +mt76x0_efuse_read(struct mt76x0_dev *dev, u16 addr, u8 *data, + enum mt76x0_eeprom_access_modes mode) +{ + u32 val; + int i; + + val = mt76_rr(dev, MT_EFUSE_CTRL); + val &= ~(MT_EFUSE_CTRL_AIN | + MT_EFUSE_CTRL_MODE); + val |= FIELD_PREP(MT_EFUSE_CTRL_AIN, addr & ~0xf) | + FIELD_PREP(MT_EFUSE_CTRL_MODE, mode) | + MT_EFUSE_CTRL_KICK; + mt76_wr(dev, MT_EFUSE_CTRL, val); + + if (!mt76_poll(dev, MT_EFUSE_CTRL, MT_EFUSE_CTRL_KICK, 0, 1000)) + return -ETIMEDOUT; + + val = mt76_rr(dev, MT_EFUSE_CTRL); + if ((val & MT_EFUSE_CTRL_AOUT) == MT_EFUSE_CTRL_AOUT) { + /* Parts of eeprom not in the usage map (0x80-0xc0,0xf0) + * will not return valid data but it's ok. + */ + memset(data, 0xff, 16); + return 0; + } + + for (i = 0; i < 4; i++) { + val = mt76_rr(dev, MT_EFUSE_DATA(i)); + put_unaligned_le32(val, data + 4 * i); + } + + return 0; +} + +#define MT_MAP_READS DIV_ROUND_UP(MT_EFUSE_USAGE_MAP_SIZE, 16) +static int +mt76x0_efuse_physical_size_check(struct mt76x0_dev *dev) +{ + u8 data[MT_MAP_READS * 16]; + int ret, i; + u32 start = 0, end = 0, cnt_free; + + for (i = 0; i < MT_MAP_READS; i++) { + ret = mt76x0_efuse_read(dev, MT_EE_USAGE_MAP_START + i * 16, + data + i * 16, MT_EE_PHYSICAL_READ); + if (ret) + return ret; + } + + for (i = 0; i < MT_EFUSE_USAGE_MAP_SIZE; i++) + if (!data[i]) { + if (!start) + start = MT_EE_USAGE_MAP_START + i; + end = MT_EE_USAGE_MAP_START + i; + } + cnt_free = end - start + 1; + + if (MT_EFUSE_USAGE_MAP_SIZE - cnt_free < 5) { + dev_err(dev->mt76.dev, "Error: your device needs default EEPROM file and this driver doesn't support it!\n"); + return -EINVAL; + } + + return 0; +} + +static void +mt76x0_set_chip_cap(struct mt76x0_dev *dev, u8 *eeprom) +{ + enum mt76x2_board_type { BOARD_TYPE_2GHZ = 1, BOARD_TYPE_5GHZ = 2 }; + u16 nic_conf0 = get_unaligned_le16(eeprom + MT_EE_NIC_CONF_0); + u16 nic_conf1 = get_unaligned_le16(eeprom + MT_EE_NIC_CONF_1); + + dev_dbg(dev->mt76.dev, "NIC_CONF0: %04x NIC_CONF1: %04x\n", nic_conf0, nic_conf1); + + switch (FIELD_GET(MT_EE_NIC_CONF_0_BOARD_TYPE, nic_conf0)) { + case BOARD_TYPE_5GHZ: + dev->ee->has_5ghz = true; + break; + case BOARD_TYPE_2GHZ: + dev->ee->has_2ghz = true; + break; + default: + dev->ee->has_2ghz = true; + dev->ee->has_5ghz = true; + break; + } + + dev_dbg(dev->mt76.dev, "Has 2GHZ %d 5GHZ %d\n", dev->ee->has_2ghz, dev->ee->has_5ghz); + + if (!field_valid(nic_conf1 & 0xff)) + nic_conf1 &= 0xff00; + + if (nic_conf1 & MT_EE_NIC_CONF_1_HW_RF_CTRL) + dev_err(dev->mt76.dev, + "Error: this driver does not support HW RF ctrl\n"); + + if (!field_valid(nic_conf0 >> 8)) + return; + + if (FIELD_GET(MT_EE_NIC_CONF_0_RX_PATH, nic_conf0) > 1 || + FIELD_GET(MT_EE_NIC_CONF_0_TX_PATH, nic_conf0) > 1) + dev_err(dev->mt76.dev, + "Error: device has more than 1 RX/TX stream!\n"); + + dev->ee->pa_type = FIELD_GET(MT_EE_NIC_CONF_0_PA_TYPE, nic_conf0); + dev_dbg(dev->mt76.dev, "PA Type %d\n", dev->ee->pa_type); +} + +static int +mt76x0_set_macaddr(struct mt76x0_dev *dev, const u8 *eeprom) +{ + const void *src = eeprom + MT_EE_MAC_ADDR; + + ether_addr_copy(dev->macaddr, src); + + if (!is_valid_ether_addr(dev->macaddr)) { + eth_random_addr(dev->macaddr); + dev_info(dev->mt76.dev, + "Invalid MAC address, using random address %pM\n", + dev->macaddr); + } + + mt76_wr(dev, MT_MAC_ADDR_DW0, get_unaligned_le32(dev->macaddr)); + mt76_wr(dev, MT_MAC_ADDR_DW1, get_unaligned_le16(dev->macaddr + 4) | + FIELD_PREP(MT_MAC_ADDR_DW1_U2ME_MASK, 0xff)); + + return 0; +} + +static void +mt76x0_set_temp_offset(struct mt76x0_dev *dev, u8 *eeprom) +{ + u8 temp = eeprom[MT_EE_TEMP_OFFSET]; + + if (field_valid(temp)) + dev->ee->temp_off = sign_extend(temp, 8); + else + dev->ee->temp_off = -10; +} + +static void +mt76x0_set_country_reg(struct mt76x0_dev *dev, u8 *eeprom) +{ + /* Note: - region 31 is not valid for mt76x0 (see rtmp_init.c) + * - comments in rtmp_def.h are incorrect (see rt_channel.c) + */ + static const struct reg_channel_bounds chan_bounds[] = { + /* EEPROM country regions 0 - 7 */ + { 1, 11 }, { 1, 13 }, { 10, 2 }, { 10, 4 }, + { 14, 1 }, { 1, 14 }, { 3, 7 }, { 5, 9 }, + /* EEPROM country regions 32 - 33 */ + { 1, 11 }, { 1, 14 } + }; + u8 val = eeprom[MT_EE_COUNTRY_REGION_2GHZ]; + int idx = -1; + + dev_dbg(dev->mt76.dev, "REG 2GHZ %u REG 5GHZ %u\n", val, eeprom[MT_EE_COUNTRY_REGION_5GHZ]); + if (val < 8) + idx = val; + if (val > 31 && val < 33) + idx = val - 32 + 8; + + if (idx != -1) + dev_info(dev->mt76.dev, + "EEPROM country region %02hhx (channels %hhd-%hhd)\n", + val, chan_bounds[idx].start, + chan_bounds[idx].start + chan_bounds[idx].num - 1); + else + idx = 5; /* channels 1 - 14 */ + + dev->ee->reg = chan_bounds[idx]; + + /* TODO: country region 33 is special - phy should be set to B-mode + * before entering channel 14 (see sta/connect.c) + */ +} + +static void +mt76x0_set_rf_freq_off(struct mt76x0_dev *dev, u8 *eeprom) +{ + u8 comp; + + dev->ee->rf_freq_off = field_validate(eeprom[MT_EE_FREQ_OFFSET]); + comp = field_validate(eeprom[MT_EE_FREQ_OFFSET_COMPENSATION]); + + if (comp & BIT(7)) + dev->ee->rf_freq_off -= comp & 0x7f; + else + dev->ee->rf_freq_off += comp; +} + +static void +mt76x0_set_lna_gain(struct mt76x0_dev *dev, u8 *eeprom) +{ + u8 gain; + + dev->ee->lna_gain_2ghz = eeprom[MT_EE_LNA_GAIN_2GHZ]; + dev->ee->lna_gain_5ghz[0] = eeprom[MT_EE_LNA_GAIN_5GHZ_0]; + + gain = eeprom[MT_EE_LNA_GAIN_5GHZ_1]; + if (gain == 0xff || gain == 0) + dev->ee->lna_gain_5ghz[1] = dev->ee->lna_gain_5ghz[0]; + else + dev->ee->lna_gain_5ghz[1] = gain; + + gain = eeprom[MT_EE_LNA_GAIN_5GHZ_2]; + if (gain == 0xff || gain == 0) + dev->ee->lna_gain_5ghz[2] = dev->ee->lna_gain_5ghz[0]; + else + dev->ee->lna_gain_5ghz[2] = gain; +} + +static void +mt76x0_set_rssi_offset(struct mt76x0_dev *dev, u8 *eeprom) +{ + int i; + s8 *rssi_offset = dev->ee->rssi_offset_2ghz; + + for (i = 0; i < 2; i++) { + rssi_offset[i] = eeprom[MT_EE_RSSI_OFFSET + i]; + + if (rssi_offset[i] < -10 || rssi_offset[i] > 10) { + dev_warn(dev->mt76.dev, + "Warning: EEPROM RSSI is invalid %02hhx\n", + rssi_offset[i]); + rssi_offset[i] = 0; + } + } + + rssi_offset = dev->ee->rssi_offset_5ghz; + + for (i = 0; i < 3; i++) { + rssi_offset[i] = eeprom[MT_EE_RSSI_OFFSET_5GHZ + i]; + + if (rssi_offset[i] < -10 || rssi_offset[i] > 10) { + dev_warn(dev->mt76.dev, + "Warning: EEPROM RSSI is invalid %02hhx\n", + rssi_offset[i]); + rssi_offset[i] = 0; + } + } +} + +static u32 +calc_bw40_power_rate(u32 value, int delta) +{ + u32 ret = 0; + int i, tmp; + + for (i = 0; i < 4; i++) { + tmp = s6_to_int((value >> i*8) & 0xff) + delta; + ret |= (u32)(int_to_s6(tmp)) << i*8; + } + + return ret; +} + +static s8 +get_delta(u8 val) +{ + s8 ret; + + if (!field_valid(val) || !(val & BIT(7))) + return 0; + + ret = val & 0x1f; + if (ret > 8) + ret = 8; + if (val & BIT(6)) + ret = -ret; + + return ret; +} + +static void +mt76x0_set_tx_power_per_rate(struct mt76x0_dev *dev, u8 *eeprom) +{ + s8 bw40_delta_2g, bw40_delta_5g; + u32 val; + int i; + + bw40_delta_2g = get_delta(eeprom[MT_EE_TX_POWER_DELTA_BW40]); + bw40_delta_5g = get_delta(eeprom[MT_EE_TX_POWER_DELTA_BW40 + 1]); + + for (i = 0; i < 5; i++) { + val = get_unaligned_le32(eeprom + MT_EE_TX_POWER_BYRATE(i)); + + /* Skip last 16 bits. */ + if (i == 4) + val &= 0x0000ffff; + + dev->ee->tx_pwr_cfg_2g[i][0] = val; + dev->ee->tx_pwr_cfg_2g[i][1] = calc_bw40_power_rate(val, bw40_delta_2g); + } + + /* Reading per rate tx power for 5 GHz band is a bit more complex. Note + * we mix 16 bit and 32 bit reads and sometimes do shifts. + */ + val = get_unaligned_le16(eeprom + 0x120); + val <<= 16; + dev->ee->tx_pwr_cfg_5g[0][0] = val; + dev->ee->tx_pwr_cfg_5g[0][1] = calc_bw40_power_rate(val, bw40_delta_5g); + + val = get_unaligned_le32(eeprom + 0x122); + dev->ee->tx_pwr_cfg_5g[1][0] = val; + dev->ee->tx_pwr_cfg_5g[1][1] = calc_bw40_power_rate(val, bw40_delta_5g); + + val = get_unaligned_le16(eeprom + 0x126); + dev->ee->tx_pwr_cfg_5g[2][0] = val; + dev->ee->tx_pwr_cfg_5g[2][1] = calc_bw40_power_rate(val, bw40_delta_5g); + + val = get_unaligned_le16(eeprom + 0xec); + val <<= 16; + dev->ee->tx_pwr_cfg_5g[3][0] = val; + dev->ee->tx_pwr_cfg_5g[3][1] = calc_bw40_power_rate(val, bw40_delta_5g); + + val = get_unaligned_le16(eeprom + 0xee); + dev->ee->tx_pwr_cfg_5g[4][0] = val; + dev->ee->tx_pwr_cfg_5g[4][1] = calc_bw40_power_rate(val, bw40_delta_5g); +} + +static void +mt76x0_set_tx_power_per_chan(struct mt76x0_dev *dev, u8 *eeprom) +{ + int i; + u8 tx_pwr; + + for (i = 0; i < 14; i++) { + tx_pwr = eeprom[MT_EE_TX_POWER_OFFSET_2GHZ + i]; + if (tx_pwr <= 0x3f && tx_pwr > 0) + dev->ee->tx_pwr_per_chan[i] = tx_pwr; + else + dev->ee->tx_pwr_per_chan[i] = 5; + } + + for (i = 0; i < 40; i++) { + tx_pwr = eeprom[MT_EE_TX_POWER_OFFSET_5GHZ + i]; + if (tx_pwr <= 0x3f && tx_pwr > 0) + dev->ee->tx_pwr_per_chan[14 + i] = tx_pwr; + else + dev->ee->tx_pwr_per_chan[14 + i] = 5; + } + + dev->ee->tx_pwr_per_chan[54] = dev->ee->tx_pwr_per_chan[22]; + dev->ee->tx_pwr_per_chan[55] = dev->ee->tx_pwr_per_chan[28]; + dev->ee->tx_pwr_per_chan[56] = dev->ee->tx_pwr_per_chan[34]; + dev->ee->tx_pwr_per_chan[57] = dev->ee->tx_pwr_per_chan[44]; +} + +int +mt76x0_eeprom_init(struct mt76x0_dev *dev) +{ + u8 *eeprom; + int i, ret; + + ret = mt76x0_efuse_physical_size_check(dev); + if (ret) + return ret; + + dev->ee = devm_kzalloc(dev->mt76.dev, sizeof(*dev->ee), GFP_KERNEL); + if (!dev->ee) + return -ENOMEM; + + eeprom = kmalloc(MT76X0_EEPROM_SIZE, GFP_KERNEL); + if (!eeprom) + return -ENOMEM; + + for (i = 0; i + 16 <= MT76X0_EEPROM_SIZE; i += 16) { + ret = mt76x0_efuse_read(dev, i, eeprom + i, MT_EE_READ); + if (ret) + goto out; + } + + if (eeprom[MT_EE_VERSION_EE] > MT76X0U_EE_MAX_VER) + dev_warn(dev->mt76.dev, + "Warning: unsupported EEPROM version %02hhx\n", + eeprom[MT_EE_VERSION_EE]); + dev_info(dev->mt76.dev, "EEPROM ver:%02hhx fae:%02hhx\n", + eeprom[MT_EE_VERSION_EE], eeprom[MT_EE_VERSION_FAE]); + + mt76x0_set_macaddr(dev, eeprom); + mt76x0_set_chip_cap(dev, eeprom); + mt76x0_set_country_reg(dev, eeprom); + mt76x0_set_rf_freq_off(dev, eeprom); + mt76x0_set_temp_offset(dev, eeprom); + mt76x0_set_lna_gain(dev, eeprom); + mt76x0_set_rssi_offset(dev, eeprom); + dev->chainmask = 0x0101; + + mt76x0_set_tx_power_per_rate(dev, eeprom); + mt76x0_set_tx_power_per_chan(dev, eeprom); + +out: + kfree(eeprom); + return ret; +} |