diff options
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt7921/usb_mac.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt7921/usb_mac.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/usb_mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/usb_mac.c new file mode 100644 index 000000000..efbd3954c --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt7921/usb_mac.c @@ -0,0 +1,255 @@ +// SPDX-License-Identifier: ISC +/* Copyright (C) 2022 MediaTek Inc. + * + * Author: Lorenzo Bianconi <lorenzo@kernel.org> + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/usb.h> + +#include "mt7921.h" +#include "mcu.h" +#include "mac.h" + +static u32 mt7921u_uhw_rr(struct mt76_dev *dev, u32 addr) +{ + u32 ret; + + mutex_lock(&dev->usb.usb_ctrl_mtx); + ret = ___mt76u_rr(dev, MT_VEND_DEV_MODE, + USB_DIR_IN | MT_USB_TYPE_UHW_VENDOR, addr); + mutex_unlock(&dev->usb.usb_ctrl_mtx); + + return ret; +} + +static void mt7921u_uhw_wr(struct mt76_dev *dev, u32 addr, u32 val) +{ + mutex_lock(&dev->usb.usb_ctrl_mtx); + ___mt76u_wr(dev, MT_VEND_WRITE, + USB_DIR_OUT | MT_USB_TYPE_UHW_VENDOR, addr, val); + mutex_unlock(&dev->usb.usb_ctrl_mtx); +} + +static void mt7921u_dma_prefetch(struct mt7921_dev *dev) +{ + mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(0), + MT_WPDMA0_MAX_CNT_MASK, 4); + mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(0), + MT_WPDMA0_BASE_PTR_MASK, 0x80); + + mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(1), + MT_WPDMA0_MAX_CNT_MASK, 4); + mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(1), + MT_WPDMA0_BASE_PTR_MASK, 0xc0); + + mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(2), + MT_WPDMA0_MAX_CNT_MASK, 4); + mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(2), + MT_WPDMA0_BASE_PTR_MASK, 0x100); + + mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(3), + MT_WPDMA0_MAX_CNT_MASK, 4); + mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(3), + MT_WPDMA0_BASE_PTR_MASK, 0x140); + + mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(4), + MT_WPDMA0_MAX_CNT_MASK, 4); + mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(4), + MT_WPDMA0_BASE_PTR_MASK, 0x180); + + mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(16), + MT_WPDMA0_MAX_CNT_MASK, 4); + mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(16), + MT_WPDMA0_BASE_PTR_MASK, 0x280); + + mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(17), + MT_WPDMA0_MAX_CNT_MASK, 4); + mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(17), + MT_WPDMA0_BASE_PTR_MASK, 0x2c0); +} + +static void mt7921u_wfdma_init(struct mt7921_dev *dev) +{ + mt7921u_dma_prefetch(dev); + + mt76_clear(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_OMIT_RX_INFO); + mt76_set(dev, MT_UWFDMA0_GLO_CFG, + MT_WFDMA0_GLO_CFG_OMIT_TX_INFO | + MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2 | + MT_WFDMA0_GLO_CFG_FW_DWLD_BYPASS_DMASHDL | + MT_WFDMA0_GLO_CFG_TX_DMA_EN | + MT_WFDMA0_GLO_CFG_RX_DMA_EN); + + /* disable dmashdl */ + mt76_clear(dev, MT_UWFDMA0_GLO_CFG_EXT0, + MT_WFDMA0_CSR_TX_DMASHDL_ENABLE); + mt76_set(dev, MT_DMASHDL_SW_CONTROL, MT_DMASHDL_DMASHDL_BYPASS); + + mt76_set(dev, MT_WFDMA_DUMMY_CR, MT_WFDMA_NEED_REINIT); +} + +static int mt7921u_dma_rx_evt_ep4(struct mt7921_dev *dev) +{ + if (!mt76_poll(dev, MT_UWFDMA0_GLO_CFG, + MT_WFDMA0_GLO_CFG_RX_DMA_BUSY, 0, 1000)) + return -ETIMEDOUT; + + mt76_clear(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_RX_DMA_EN); + mt76_set(dev, MT_WFDMA_HOST_CONFIG, + MT_WFDMA_HOST_CONFIG_USB_RXEVT_EP4_EN); + mt76_set(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_RX_DMA_EN); + + return 0; +} + +static void mt7921u_epctl_rst_opt(struct mt7921_dev *dev, bool reset) +{ + u32 val; + + /* usb endpoint reset opt + * bits[4,9]: out blk ep 4-9 + * bits[20,21]: in blk ep 4-5 + * bits[22]: in int ep 6 + */ + val = mt7921u_uhw_rr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT); + if (reset) + val |= GENMASK(9, 4) | GENMASK(22, 20); + else + val &= ~(GENMASK(9, 4) | GENMASK(22, 20)); + mt7921u_uhw_wr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT, val); +} + +int mt7921u_dma_init(struct mt7921_dev *dev, bool resume) +{ + int err; + + mt7921u_wfdma_init(dev); + + mt76_clear(dev, MT_UDMA_WLCFG_0, MT_WL_RX_FLUSH); + + mt76_set(dev, MT_UDMA_WLCFG_0, + MT_WL_RX_EN | MT_WL_TX_EN | + MT_WL_RX_MPSZ_PAD0 | MT_TICK_1US_EN); + mt76_clear(dev, MT_UDMA_WLCFG_0, + MT_WL_RX_AGG_TO | MT_WL_RX_AGG_LMT); + mt76_clear(dev, MT_UDMA_WLCFG_1, MT_WL_RX_AGG_PKT_LMT); + + if (resume) + return 0; + + err = mt7921u_dma_rx_evt_ep4(dev); + if (err) + return err; + + mt7921u_epctl_rst_opt(dev, false); + + return 0; +} + +int mt7921u_wfsys_reset(struct mt7921_dev *dev) +{ + u32 val; + int i; + + mt7921u_epctl_rst_opt(dev, false); + + val = mt7921u_uhw_rr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST); + val |= MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH; + mt7921u_uhw_wr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST, val); + + usleep_range(10, 20); + + val = mt7921u_uhw_rr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST); + val &= ~MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH; + mt7921u_uhw_wr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST, val); + + mt7921u_uhw_wr(&dev->mt76, MT_UDMA_CONN_INFRA_STATUS_SEL, 0); + for (i = 0; i < MT7921_WFSYS_INIT_RETRY_COUNT; i++) { + val = mt7921u_uhw_rr(&dev->mt76, MT_UDMA_CONN_INFRA_STATUS); + if (val & MT_UDMA_CONN_WFSYS_INIT_DONE) + break; + + msleep(100); + } + + if (i == MT7921_WFSYS_INIT_RETRY_COUNT) + return -ETIMEDOUT; + + return 0; +} + +int mt7921u_init_reset(struct mt7921_dev *dev) +{ + set_bit(MT76_RESET, &dev->mphy.state); + + wake_up(&dev->mt76.mcu.wait); + skb_queue_purge(&dev->mt76.mcu.res_q); + + mt76u_stop_rx(&dev->mt76); + mt76u_stop_tx(&dev->mt76); + + mt7921u_wfsys_reset(dev); + + clear_bit(MT76_RESET, &dev->mphy.state); + + return mt76u_resume_rx(&dev->mt76); +} + +int mt7921u_mac_reset(struct mt7921_dev *dev) +{ + int err; + + mt76_txq_schedule_all(&dev->mphy); + mt76_worker_disable(&dev->mt76.tx_worker); + + set_bit(MT76_RESET, &dev->mphy.state); + set_bit(MT76_MCU_RESET, &dev->mphy.state); + + wake_up(&dev->mt76.mcu.wait); + skb_queue_purge(&dev->mt76.mcu.res_q); + + mt76u_stop_rx(&dev->mt76); + mt76u_stop_tx(&dev->mt76); + + mt7921u_wfsys_reset(dev); + + clear_bit(MT76_MCU_RESET, &dev->mphy.state); + err = mt76u_resume_rx(&dev->mt76); + if (err) + goto out; + + err = mt7921u_mcu_power_on(dev); + if (err) + goto out; + + err = mt7921u_dma_init(dev, false); + if (err) + goto out; + + mt76_wr(dev, MT_SWDEF_MODE, MT_SWDEF_NORMAL_MODE); + mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN); + + err = mt7921_run_firmware(dev); + if (err) + goto out; + + mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN); + + err = mt7921_mcu_set_eeprom(dev); + if (err) + goto out; + + err = mt7921_mac_init(dev); + if (err) + goto out; + + err = __mt7921_start(&dev->phy); +out: + clear_bit(MT76_RESET, &dev->mphy.state); + + mt76_worker_enable(&dev->mt76.tx_worker); + + return err; +} |