gitops/mt76
1
0
Fork 0
mirror of https://github.com/outbackdingo/mt76.git synced 2026-10-24 21:36:52 +00:00
Code Issues Packages Projects Releases Wiki Activity
Files
8175695dcd5e03364e6cafe632312e92ce8e9b0d
mt76/mt792x_usb.c
T
Johan HovoldandFelix Fietkau 0aca66c123 wifi: mt76: mt792xu: drop redundant device reference 
Driver core holds a reference to the USB interface and its parent USB
device while the interface is bound to a driver and there is no need to
take additional references unless the structures are needed after
disconnect.

Drop the redundant device reference to reduce cargo culting, make it
easier to spot drivers where an extra reference is needed, and reduce
the risk of memory leaks when drivers fail to release it.

Signed-off-by: Johan Hovold <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Felix Fietkau <[email protected]>
2026-05-27 13:23:21 +02:00

352 lines
8.9 KiB
C
Raw Blame History

// SPDX-License-Identifier: BSD-3-Clause-Clear
/* Copyright (C) 2023 MediaTek Inc.
*
* Author: Lorenzo Bianconi <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/usb.h>
#include "mt792x.h"
#include "mt76_connac2_mac.h"
u32 mt792xu_rr(struct mt76_dev *dev, u32 addr)
{
u32 ret;
mutex_lock(&dev->usb.usb_ctrl_mtx);
ret = ___mt76u_rr(dev, MT_VEND_READ_EXT,
USB_DIR_IN | MT_USB_TYPE_VENDOR, addr);
mutex_unlock(&dev->usb.usb_ctrl_mtx);
return ret;
}
EXPORT_SYMBOL_GPL(mt792xu_rr);
void mt792xu_wr(struct mt76_dev *dev, u32 addr, u32 val)
{
mutex_lock(&dev->usb.usb_ctrl_mtx);
___mt76u_wr(dev, MT_VEND_WRITE_EXT,
USB_DIR_OUT | MT_USB_TYPE_VENDOR, addr, val);
mutex_unlock(&dev->usb.usb_ctrl_mtx);
}
EXPORT_SYMBOL_GPL(mt792xu_wr);
u32 mt792xu_rmw(struct mt76_dev *dev, u32 addr, u32 mask, u32 val)
{
mutex_lock(&dev->usb.usb_ctrl_mtx);
val |= ___mt76u_rr(dev, MT_VEND_READ_EXT,
USB_DIR_IN | MT_USB_TYPE_VENDOR, addr) & ~mask;
___mt76u_wr(dev, MT_VEND_WRITE_EXT,
USB_DIR_OUT | MT_USB_TYPE_VENDOR, addr, val);
mutex_unlock(&dev->usb.usb_ctrl_mtx);
return val;
}
EXPORT_SYMBOL_GPL(mt792xu_rmw);
void mt792xu_copy(struct mt76_dev *dev, u32 offset, const void *data, int len)
{
struct mt76_usb *usb = &dev->usb;
int ret, i = 0, batch_len;
const u8 *val = data;
len = round_up(len, 4);
mutex_lock(&usb->usb_ctrl_mtx);
while (i < len) {
batch_len = min_t(int, usb->data_len, len - i);
memcpy(usb->data, val + i, batch_len);
ret = __mt76u_vendor_request(dev, MT_VEND_WRITE_EXT,
USB_DIR_OUT | MT_USB_TYPE_VENDOR,
(offset + i) >> 16, offset + i,
usb->data, batch_len);
if (ret < 0)
break;
i += batch_len;
}
mutex_unlock(&usb->usb_ctrl_mtx);
}
EXPORT_SYMBOL_GPL(mt792xu_copy);
int mt792xu_mcu_power_on(struct mt792x_dev *dev)
{
int ret;
ret = mt76u_vendor_request(&dev->mt76, MT_VEND_POWER_ON,
USB_DIR_OUT | MT_USB_TYPE_VENDOR,
0x0, 0x1, NULL, 0);
if (ret)
return ret;
if (!mt76_poll_msec(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_PWR_ON,
MT_TOP_MISC2_FW_PWR_ON, 500)) {
dev_err(dev->mt76.dev, "Timeout for power on\n");
ret = -EIO;
}
return ret;
}
EXPORT_SYMBOL_GPL(mt792xu_mcu_power_on);
static void mt792xu_cleanup(struct mt792x_dev *dev)
{
clear_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
mt792xu_wfsys_reset(dev);
skb_queue_purge(&dev->mt76.mcu.res_q);
mt76u_queues_deinit(&dev->mt76);
}
static u32 mt792xu_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 mt792xu_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 mt792xu_dma_prefetch(struct mt792x_dev *dev)
{
#define DMA_PREFETCH_CONF(_idx_, _cnt_, _base_) \
mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL((_idx_)), \
MT_WPDMA0_MAX_CNT_MASK | MT_WPDMA0_BASE_PTR_MASK, \
FIELD_PREP(MT_WPDMA0_MAX_CNT_MASK, (_cnt_)) | \
FIELD_PREP(MT_WPDMA0_BASE_PTR_MASK, (_base_)))
DMA_PREFETCH_CONF(0, 4, 0x080);
DMA_PREFETCH_CONF(1, 4, 0x0c0);
DMA_PREFETCH_CONF(2, 4, 0x100);
DMA_PREFETCH_CONF(3, 4, 0x140);
DMA_PREFETCH_CONF(4, 4, 0x180);
DMA_PREFETCH_CONF(16, 4, 0x280);
DMA_PREFETCH_CONF(17, 4, 0x2c0);
}
static void mt792xu_wfdma_init(struct mt792x_dev *dev)
{
int i;
mt792xu_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);
mt76_rmw(dev, MT_DMASHDL_REFILL, MT_DMASHDL_REFILL_MASK, 0xffe00000);
mt76_clear(dev, MT_DMASHDL_PAGE, MT_DMASHDL_GROUP_SEQ_ORDER);
mt76_rmw(dev, MT_DMASHDL_PKT_MAX_SIZE,
MT_DMASHDL_PKT_MAX_SIZE_PLE | MT_DMASHDL_PKT_MAX_SIZE_PSE,
FIELD_PREP(MT_DMASHDL_PKT_MAX_SIZE_PLE, 1) |
FIELD_PREP(MT_DMASHDL_PKT_MAX_SIZE_PSE, 0));
for (i = 0; i < 5; i++)
mt76_wr(dev, MT_DMASHDL_GROUP_QUOTA(i),
FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MIN, 0x3) |
FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MAX, 0xfff));
for (i = 5; i < 16; i++)
mt76_wr(dev, MT_DMASHDL_GROUP_QUOTA(i),
FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MIN, 0x0) |
FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MAX, 0x0));
mt76_wr(dev, MT_DMASHDL_Q_MAP(0), 0x32013201);
mt76_wr(dev, MT_DMASHDL_Q_MAP(1), 0x32013201);
mt76_wr(dev, MT_DMASHDL_Q_MAP(2), 0x55555444);
mt76_wr(dev, MT_DMASHDL_Q_MAP(3), 0x55555444);
mt76_wr(dev, MT_DMASHDL_SCHED_SET(0), 0x76540132);
mt76_wr(dev, MT_DMASHDL_SCHED_SET(1), 0xFEDCBA98);
mt76_set(dev, MT_WFDMA_DUMMY_CR, MT_WFDMA_NEED_REINIT);
}
static int mt792xu_dma_rx_evt_ep4(struct mt792x_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 mt792xu_epctl_rst_opt(struct mt792x_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 = mt792xu_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));
mt792xu_uhw_wr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT, val);
}
struct mt792xu_wfsys_desc {
u32 rst_reg;
u32 done_reg;
u32 done_mask;
u32 done_val;
u32 delay_ms;
bool need_status_sel;
};
static const struct mt792xu_wfsys_desc mt7921_wfsys_desc = {
.rst_reg = MT_CBTOP_RGU_WF_SUBSYS_RST,
.done_reg = MT_UDMA_CONN_INFRA_STATUS,
.done_mask = MT_UDMA_CONN_WFSYS_INIT_DONE,
.done_val = MT_UDMA_CONN_WFSYS_INIT_DONE,
.delay_ms = 0,
.need_status_sel = true,
};
static const struct mt792xu_wfsys_desc mt7925_wfsys_desc = {
.rst_reg = MT7925_CBTOP_RGU_WF_SUBSYS_RST,
.done_reg = MT7925_WFSYS_INIT_DONE_ADDR,
.done_mask = U32_MAX,
.done_val = MT7925_WFSYS_INIT_DONE,
.delay_ms = 20,
.need_status_sel = false,
};
int mt792xu_dma_init(struct mt792x_dev *dev, bool resume)
{
int err;
mt792xu_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 = mt792xu_dma_rx_evt_ep4(dev);
if (err)
return err;
mt792xu_epctl_rst_opt(dev, false);
return 0;
}
EXPORT_SYMBOL_GPL(mt792xu_dma_init);
int mt792xu_wfsys_reset(struct mt792x_dev *dev)
{
const struct mt792xu_wfsys_desc *desc = is_mt7925(&dev->mt76) ?
&mt7925_wfsys_desc :
&mt7921_wfsys_desc;
u32 val;
int i;
mt792xu_epctl_rst_opt(dev, false);
val = mt792xu_uhw_rr(&dev->mt76, desc->rst_reg);
val |= MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH;
mt792xu_uhw_wr(&dev->mt76, desc->rst_reg, val);
if (desc->delay_ms)
msleep(desc->delay_ms);
else
usleep_range(10, 20);
val = mt792xu_uhw_rr(&dev->mt76, desc->rst_reg);
val &= ~MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH;
mt792xu_uhw_wr(&dev->mt76, desc->rst_reg, val);
if (desc->need_status_sel)
mt792xu_uhw_wr(&dev->mt76, MT_UDMA_CONN_INFRA_STATUS_SEL, 0);
for (i = 0; i < MT792x_WFSYS_INIT_RETRY_COUNT; i++) {
val = mt792xu_uhw_rr(&dev->mt76, desc->done_reg);
if ((val & desc->done_mask) == desc->done_val)
break;
msleep(100);
}
if (i == MT792x_WFSYS_INIT_RETRY_COUNT)
return -ETIMEDOUT;
return 0;
}
EXPORT_SYMBOL_GPL(mt792xu_wfsys_reset);
int mt792xu_init_reset(struct mt792x_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);
mt792xu_wfsys_reset(dev);
clear_bit(MT76_RESET, &dev->mphy.state);
return mt76u_resume_rx(&dev->mt76);
}
EXPORT_SYMBOL_GPL(mt792xu_init_reset);
void mt792xu_stop(struct ieee80211_hw *hw, bool suspend)
{
struct mt792x_dev *dev = mt792x_hw_dev(hw);
mt76u_stop_tx(&dev->mt76);
mt792x_stop(hw, false);
}
EXPORT_SYMBOL_GPL(mt792xu_stop);
void mt792xu_disconnect(struct usb_interface *usb_intf)
{
struct mt792x_dev *dev = usb_get_intfdata(usb_intf);
cancel_work_sync(&dev->init_work);
if (!test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
return;
mt76_unregister_device(&dev->mt76);
mt792xu_cleanup(dev);
usb_set_intfdata(usb_intf, NULL);
mt76_free_device(&dev->mt76);
}
EXPORT_SYMBOL_GPL(mt792xu_disconnect);
MODULE_DESCRIPTION("MediaTek MT792x USB helpers");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Lorenzo Bianconi <[email protected]>");
Reference in New Issue View Git Blame Copy Permalink