| /* |
| * Copyright (C) 2018 Lorenzo Bianconi <[email protected]> |
| * |
| * 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 "eeprom.h" |
| |
| static void mt76x2u_mac_reset_counters(struct mt76x02_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 mt76x02_dev *dev) |
| { |
| s8 offset = 0; |
| u16 eep_val; |
| |
| eep_val = mt76x02_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 = mt76x02_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 = mt76x02_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 mt76x02_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_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 mt76x02_dev *dev) |
| { |
| mt76x2u_mac_reset_counters(dev); |
| |
| mt76_wr(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX); |
| mt76x02_wait_for_wpdma(&dev->mt76, 1000); |
| usleep_range(50, 100); |
| |
| mt76_wr(dev, MT_RX_FILTR_CFG, dev->mt76.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 mt76x02_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, MT_TXOP_ED_CCA_EN); |
| mt76_clear(dev, MT_TXOP_HLDR_ET, MT_TXOP_HLDR_TX40M_BLK_EN); |
| |
| /* 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; |
| } |
