diff options
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt76x2u_mac.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt76x2u_mac.c | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2u_mac.c b/drivers/net/wireless/mediatek/mt76/mt76x2u_mac.c new file mode 100644 index 000000000000..eab7ab297aa6 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt76x2u_mac.c @@ -0,0 +1,240 @@ +/* + * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "mt76x2u.h" +#include "mt76x2_eeprom.h" + +static void mt76x2u_mac_reset_counters(struct mt76x2_dev *dev) +{ + mt76_rr(dev, MT_RX_STAT_0); + mt76_rr(dev, MT_RX_STAT_1); + mt76_rr(dev, MT_RX_STAT_2); + mt76_rr(dev, MT_TX_STA_0); + mt76_rr(dev, MT_TX_STA_1); + mt76_rr(dev, MT_TX_STA_2); +} + +static void mt76x2u_mac_fixup_xtal(struct mt76x2_dev *dev) +{ + s8 offset = 0; + u16 eep_val; + + eep_val = mt76x2_eeprom_get(dev, MT_EE_XTAL_TRIM_2); + + offset = eep_val & 0x7f; + if ((eep_val & 0xff) == 0xff) + offset = 0; + else if (eep_val & 0x80) + offset = 0 - offset; + + eep_val >>= 8; + if (eep_val == 0x00 || eep_val == 0xff) { + eep_val = mt76x2_eeprom_get(dev, MT_EE_XTAL_TRIM_1); + eep_val &= 0xff; + + if (eep_val == 0x00 || eep_val == 0xff) + eep_val = 0x14; + } + + eep_val &= 0x7f; + mt76_rmw_field(dev, MT_VEND_ADDR(CFG, MT_XO_CTRL5), + MT_XO_CTRL5_C2_VAL, eep_val + offset); + mt76_set(dev, MT_VEND_ADDR(CFG, MT_XO_CTRL6), MT_XO_CTRL6_C2_CTRL); + + mt76_wr(dev, 0x504, 0x06000000); + mt76_wr(dev, 0x50c, 0x08800000); + mdelay(5); + mt76_wr(dev, 0x504, 0x0); + + /* decrease SIFS from 16us to 13us */ + mt76_rmw_field(dev, MT_XIFS_TIME_CFG, + MT_XIFS_TIME_CFG_OFDM_SIFS, 0xd); + mt76_rmw_field(dev, MT_BKOFF_SLOT_CFG, MT_BKOFF_SLOT_CFG_CC_DELAY, 1); + + /* init fce */ + mt76_clear(dev, MT_FCE_L2_STUFF, MT_FCE_L2_STUFF_WR_MPDU_LEN_EN); + + eep_val = mt76x2_eeprom_get(dev, MT_EE_NIC_CONF_2); + switch (FIELD_GET(MT_EE_NIC_CONF_2_XTAL_OPTION, eep_val)) { + case 0: + mt76_wr(dev, MT_XO_CTRL7, 0x5c1fee80); + break; + case 1: + mt76_wr(dev, MT_XO_CTRL7, 0x5c1feed0); + break; + default: + break; + } +} + +int mt76x2u_mac_reset(struct mt76x2_dev *dev) +{ + mt76_wr(dev, MT_WPDMA_GLO_CFG, BIT(4) | BIT(5)); + + /* init pbf regs */ + mt76_wr(dev, MT_PBF_TX_MAX_PCNT, 0xefef3f1f); + mt76_wr(dev, MT_PBF_RX_MAX_PCNT, 0xfebf); + + mt76_write_mac_initvals(dev); + + mt76_wr(dev, MT_TX_LINK_CFG, 0x1020); + mt76_wr(dev, MT_AUTO_RSP_CFG, 0x13); + mt76_wr(dev, MT_MAX_LEN_CFG, 0x2f00); + mt76_wr(dev, MT_TX_RTS_CFG, 0x92b20); + + mt76_wr(dev, MT_WMM_AIFSN, 0x2273); + mt76_wr(dev, MT_WMM_CWMIN, 0x2344); + mt76_wr(dev, MT_WMM_CWMAX, 0x34aa); + + mt76_clear(dev, MT_MAC_SYS_CTRL, + MT_MAC_SYS_CTRL_RESET_CSR | + MT_MAC_SYS_CTRL_RESET_BBP); + + if (is_mt7612(dev)) + mt76_clear(dev, MT_COEXCFG0, MT_COEXCFG0_COEX_EN); + + mt76_set(dev, MT_EXT_CCA_CFG, 0xf000); + mt76_clear(dev, MT_TX_ALC_CFG_4, BIT(31)); + + mt76x2u_mac_fixup_xtal(dev); + + return 0; +} + +int mt76x2u_mac_start(struct mt76x2_dev *dev) +{ + mt76x2u_mac_reset_counters(dev); + + mt76_wr(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX); + wait_for_wpdma(dev); + usleep_range(50, 100); + + mt76_wr(dev, MT_RX_FILTR_CFG, dev->rxfilter); + + mt76_wr(dev, MT_MAC_SYS_CTRL, + MT_MAC_SYS_CTRL_ENABLE_TX | + MT_MAC_SYS_CTRL_ENABLE_RX); + + return 0; +} + +int mt76x2u_mac_stop(struct mt76x2_dev *dev) +{ + int i, count = 0, val; + bool stopped = false; + u32 rts_cfg; + + if (test_bit(MT76_REMOVED, &dev->mt76.state)) + return -EIO; + + rts_cfg = mt76_rr(dev, MT_TX_RTS_CFG); + mt76_wr(dev, MT_TX_RTS_CFG, rts_cfg & ~MT_TX_RTS_CFG_RETRY_LIMIT); + + mt76_clear(dev, MT_TXOP_CTRL_CFG, BIT(20)); + mt76_clear(dev, MT_TXOP_HLDR_ET, BIT(1)); + + /* wait tx dma to stop */ + for (i = 0; i < 2000; i++) { + val = mt76_rr(dev, MT_VEND_ADDR(CFG, MT_USB_U3DMA_CFG)); + if (!(val & MT_USB_DMA_CFG_TX_BUSY) && i > 10) + break; + usleep_range(50, 100); + } + + /* page count on TxQ */ + for (i = 0; i < 200; i++) { + if (!(mt76_rr(dev, 0x0438) & 0xffffffff) && + !(mt76_rr(dev, 0x0a30) & 0x000000ff) && + !(mt76_rr(dev, 0x0a34) & 0xff00ff00)) + break; + usleep_range(10, 20); + } + + /* disable tx-rx */ + mt76_clear(dev, MT_MAC_SYS_CTRL, + MT_MAC_SYS_CTRL_ENABLE_RX | + MT_MAC_SYS_CTRL_ENABLE_TX); + + /* Wait for MAC to become idle */ + for (i = 0; i < 1000; i++) { + if (!(mt76_rr(dev, MT_MAC_STATUS) & MT_MAC_STATUS_TX) && + !mt76_rr(dev, MT_BBP(IBI, 12))) { + stopped = true; + break; + } + usleep_range(10, 20); + } + + if (!stopped) { + mt76_set(dev, MT_BBP(CORE, 4), BIT(1)); + mt76_clear(dev, MT_BBP(CORE, 4), BIT(1)); + + mt76_set(dev, MT_BBP(CORE, 4), BIT(0)); + mt76_clear(dev, MT_BBP(CORE, 4), BIT(0)); + } + + /* page count on RxQ */ + for (i = 0; i < 200; i++) { + if (!(mt76_rr(dev, 0x0430) & 0x00ff0000) && + !(mt76_rr(dev, 0x0a30) & 0xffffffff) && + !(mt76_rr(dev, 0x0a34) & 0xffffffff) && + ++count > 10) + break; + msleep(50); + } + + if (!mt76_poll(dev, MT_MAC_STATUS, MT_MAC_STATUS_RX, 0, 2000)) + dev_warn(dev->mt76.dev, "MAC RX failed to stop\n"); + + /* wait rx dma to stop */ + for (i = 0; i < 2000; i++) { + val = mt76_rr(dev, MT_VEND_ADDR(CFG, MT_USB_U3DMA_CFG)); + if (!(val & MT_USB_DMA_CFG_RX_BUSY) && i > 10) + break; + usleep_range(50, 100); + } + + mt76_wr(dev, MT_TX_RTS_CFG, rts_cfg); + + return 0; +} + +void mt76x2u_mac_resume(struct mt76x2_dev *dev) +{ + mt76_wr(dev, MT_MAC_SYS_CTRL, + MT_MAC_SYS_CTRL_ENABLE_TX | + MT_MAC_SYS_CTRL_ENABLE_RX); + mt76_set(dev, MT_TXOP_CTRL_CFG, BIT(20)); + mt76_set(dev, MT_TXOP_HLDR_ET, BIT(1)); +} + +void mt76x2u_mac_setaddr(struct mt76x2_dev *dev, u8 *addr) +{ + ether_addr_copy(dev->mt76.macaddr, addr); + + if (!is_valid_ether_addr(dev->mt76.macaddr)) { + eth_random_addr(dev->mt76.macaddr); + dev_info(dev->mt76.dev, + "Invalid MAC address, using random address %pM\n", + dev->mt76.macaddr); + } + + mt76_wr(dev, MT_MAC_ADDR_DW0, get_unaligned_le32(dev->mt76.macaddr)); + mt76_wr(dev, MT_MAC_ADDR_DW1, + get_unaligned_le16(dev->mt76.macaddr + 4) | + FIELD_PREP(MT_MAC_ADDR_DW1_U2ME_MASK, 0xff)); +} + |