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mt76: add mac80211 driver for MT7615 PCIe-based chipsets
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This driver is for a newer generation of MediaTek MT7615 4x4 802.11ac
PCIe-based chipsets, which support wave2 MU-MIMO up to 4 users/group
and also support up to 160MHz bandwidth.

The driver fully supports AP, station and monitor mode.

Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Roy Luo <royluo@google.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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ryderlee1110 authored and nbd168 committed May 1, 2019
1 parent 598da38 commit 04b8e65
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Showing 17 changed files with 4,863 additions and 0 deletions.
1 change: 1 addition & 0 deletions drivers/net/wireless/mediatek/mt76/Kconfig
Original file line number Diff line number Diff line change
Expand Up @@ -22,3 +22,4 @@ config MT76x02_USB
source "drivers/net/wireless/mediatek/mt76/mt76x0/Kconfig"
source "drivers/net/wireless/mediatek/mt76/mt76x2/Kconfig"
source "drivers/net/wireless/mediatek/mt76/mt7603/Kconfig"
source "drivers/net/wireless/mediatek/mt76/mt7615/Kconfig"
1 change: 1 addition & 0 deletions drivers/net/wireless/mediatek/mt76/Makefile
Original file line number Diff line number Diff line change
Expand Up @@ -23,3 +23,4 @@ mt76x02-usb-y := mt76x02_usb_mcu.o mt76x02_usb_core.o
obj-$(CONFIG_MT76x0_COMMON) += mt76x0/
obj-$(CONFIG_MT76x2_COMMON) += mt76x2/
obj-$(CONFIG_MT7603E) += mt7603/
obj-$(CONFIG_MT7615E) += mt7615/
1 change: 1 addition & 0 deletions drivers/net/wireless/mediatek/mt76/mt76.h
Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,7 @@ enum mt76_txq_id {
MT_TXQ_MCU,
MT_TXQ_BEACON,
MT_TXQ_CAB,
MT_TXQ_FWDL,
__MT_TXQ_MAX
};

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7 changes: 7 additions & 0 deletions drivers/net/wireless/mediatek/mt76/mt7615/Kconfig
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@@ -0,0 +1,7 @@
config MT7615E
tristate "MediaTek MT7615E (PCIe) support"
select MT76_CORE
depends on MAC80211
depends on PCI
help
This adds support for MT7615-based wireless PCIe devices.
5 changes: 5 additions & 0 deletions drivers/net/wireless/mediatek/mt76/mt7615/Makefile
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@@ -0,0 +1,5 @@
#SPDX-License-Identifier: ISC

obj-$(CONFIG_MT7615E) += mt7615e.o

mt7615e-y := pci.o init.o dma.o eeprom.o main.o mcu.o mac.o
205 changes: 205 additions & 0 deletions drivers/net/wireless/mediatek/mt76/mt7615/dma.c
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@@ -0,0 +1,205 @@
// SPDX-License-Identifier: ISC
/* Copyright (C) 2019 MediaTek Inc.
*
* Author: Ryder Lee <ryder.lee@mediatek.com>
* Roy Luo <royluo@google.com>
* Lorenzo Bianconi <lorenzo@kernel.org>
* Felix Fietkau <nbd@nbd.name>
*/

#include "mt7615.h"
#include "../dma.h"
#include "mac.h"

static int
mt7615_init_tx_queues(struct mt7615_dev *dev, int n_desc)
{
struct mt76_sw_queue *q;
struct mt76_queue *hwq;
int err, i;

hwq = devm_kzalloc(dev->mt76.dev, sizeof(*hwq), GFP_KERNEL);
if (!hwq)
return -ENOMEM;

err = mt76_queue_alloc(dev, hwq, 0, n_desc, 0, MT_TX_RING_BASE);
if (err < 0)
return err;

for (i = 0; i < MT_TXQ_MCU; i++) {
q = &dev->mt76.q_tx[i];
INIT_LIST_HEAD(&q->swq);
q->q = hwq;
}

return 0;
}

static int
mt7615_init_mcu_queue(struct mt7615_dev *dev, struct mt76_sw_queue *q,
int idx, int n_desc)
{
struct mt76_queue *hwq;
int err;

hwq = devm_kzalloc(dev->mt76.dev, sizeof(*hwq), GFP_KERNEL);
if (!hwq)
return -ENOMEM;

err = mt76_queue_alloc(dev, hwq, idx, n_desc, 0, MT_TX_RING_BASE);
if (err < 0)
return err;

INIT_LIST_HEAD(&q->swq);
q->q = hwq;

return 0;
}

void mt7615_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
struct sk_buff *skb)
{
struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
__le32 *rxd = (__le32 *)skb->data;
__le32 *end = (__le32 *)&skb->data[skb->len];
enum rx_pkt_type type;

type = FIELD_GET(MT_RXD0_PKT_TYPE, le32_to_cpu(rxd[0]));

switch (type) {
case PKT_TYPE_TXS:
for (rxd++; rxd + 7 <= end; rxd += 7)
mt7615_mac_add_txs(dev, rxd);
dev_kfree_skb(skb);
break;
case PKT_TYPE_TXRX_NOTIFY:
mt7615_mac_tx_free(dev, skb);
break;
case PKT_TYPE_RX_EVENT:
mt76_mcu_rx_event(&dev->mt76, skb);
break;
case PKT_TYPE_NORMAL:
if (!mt7615_mac_fill_rx(dev, skb)) {
mt76_rx(&dev->mt76, q, skb);
return;
}
/* fall through */
default:
dev_kfree_skb(skb);
break;
}
}

static void mt7615_tx_tasklet(unsigned long data)
{
struct mt7615_dev *dev = (struct mt7615_dev *)data;
static const u8 queue_map[] = {
MT_TXQ_MCU,
MT_TXQ_BE
};
int i;

for (i = 0; i < ARRAY_SIZE(queue_map); i++)
mt76_queue_tx_cleanup(dev, queue_map[i], false);

mt76_txq_schedule_all(&dev->mt76);

mt7615_irq_enable(dev, MT_INT_TX_DONE_ALL);
}

int mt7615_dma_init(struct mt7615_dev *dev)
{
int ret;

mt76_dma_attach(&dev->mt76);

tasklet_init(&dev->mt76.tx_tasklet, mt7615_tx_tasklet,
(unsigned long)dev);

mt76_wr(dev, MT_WPDMA_GLO_CFG,
MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE |
MT_WPDMA_GLO_CFG_FIFO_LITTLE_ENDIAN |
MT_WPDMA_GLO_CFG_FIRST_TOKEN_ONLY |
MT_WPDMA_GLO_CFG_OMIT_TX_INFO);

mt76_rmw_field(dev, MT_WPDMA_GLO_CFG,
MT_WPDMA_GLO_CFG_TX_BT_SIZE_BIT0, 0x1);

mt76_rmw_field(dev, MT_WPDMA_GLO_CFG,
MT_WPDMA_GLO_CFG_TX_BT_SIZE_BIT21, 0x1);

mt76_rmw_field(dev, MT_WPDMA_GLO_CFG,
MT_WPDMA_GLO_CFG_DMA_BURST_SIZE, 0x3);

mt76_rmw_field(dev, MT_WPDMA_GLO_CFG,
MT_WPDMA_GLO_CFG_MULTI_DMA_EN, 0x3);

mt76_wr(dev, MT_WPDMA_GLO_CFG1, 0x1);
mt76_wr(dev, MT_WPDMA_TX_PRE_CFG, 0xf0000);
mt76_wr(dev, MT_WPDMA_RX_PRE_CFG, 0xf7f0000);
mt76_wr(dev, MT_WPDMA_ABT_CFG, 0x4000026);
mt76_wr(dev, MT_WPDMA_ABT_CFG1, 0x18811881);
mt76_set(dev, 0x7158, BIT(16));
mt76_clear(dev, 0x7000, BIT(23));
mt76_wr(dev, MT_WPDMA_RST_IDX, ~0);

ret = mt7615_init_tx_queues(dev, MT7615_TX_RING_SIZE);
if (ret)
return ret;

ret = mt7615_init_mcu_queue(dev, &dev->mt76.q_tx[MT_TXQ_MCU],
MT7615_TXQ_MCU,
MT7615_TX_MCU_RING_SIZE);
if (ret)
return ret;

ret = mt7615_init_mcu_queue(dev, &dev->mt76.q_tx[MT_TXQ_FWDL],
MT7615_TXQ_FWDL,
MT7615_TX_FWDL_RING_SIZE);
if (ret)
return ret;

/* init rx queues */
ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MCU], 1,
MT7615_RX_MCU_RING_SIZE, MT_RX_BUF_SIZE,
MT_RX_RING_BASE);
if (ret)
return ret;

ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MAIN], 0,
MT7615_RX_RING_SIZE, MT_RX_BUF_SIZE,
MT_RX_RING_BASE);
if (ret)
return ret;

mt76_wr(dev, MT_DELAY_INT_CFG, 0);

ret = mt76_init_queues(dev);
if (ret < 0)
return ret;

mt76_poll(dev, MT_WPDMA_GLO_CFG,
MT_WPDMA_GLO_CFG_TX_DMA_BUSY |
MT_WPDMA_GLO_CFG_RX_DMA_BUSY, 0, 1000);

/* start dma engine */
mt76_set(dev, MT_WPDMA_GLO_CFG,
MT_WPDMA_GLO_CFG_TX_DMA_EN |
MT_WPDMA_GLO_CFG_RX_DMA_EN);

/* enable interrupts for TX/RX rings */
mt7615_irq_enable(dev, MT_INT_RX_DONE_ALL | MT_INT_TX_DONE_ALL);

return 0;
}

void mt7615_dma_cleanup(struct mt7615_dev *dev)
{
mt76_clear(dev, MT_WPDMA_GLO_CFG,
MT_WPDMA_GLO_CFG_TX_DMA_EN |
MT_WPDMA_GLO_CFG_RX_DMA_EN);
mt76_set(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_SW_RESET);

tasklet_kill(&dev->mt76.tx_tasklet);
mt76_dma_cleanup(&dev->mt76);
}
98 changes: 98 additions & 0 deletions drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c
Original file line number Diff line number Diff line change
@@ -0,0 +1,98 @@
// SPDX-License-Identifier: ISC
/* Copyright (C) 2019 MediaTek Inc.
*
* Author: Ryder Lee <ryder.lee@mediatek.com>
* Felix Fietkau <nbd@nbd.name>
*/

#include "mt7615.h"
#include "eeprom.h"

static int mt7615_efuse_read(struct mt7615_dev *dev, u32 base,
u16 addr, u8 *data)
{
u32 val;
int i;

val = mt76_rr(dev, base + MT_EFUSE_CTRL);
val &= ~(MT_EFUSE_CTRL_AIN | MT_EFUSE_CTRL_MODE);
val |= FIELD_PREP(MT_EFUSE_CTRL_AIN, addr & ~0xf);
val |= MT_EFUSE_CTRL_KICK;
mt76_wr(dev, base + MT_EFUSE_CTRL, val);

if (!mt76_poll(dev, base + MT_EFUSE_CTRL, MT_EFUSE_CTRL_KICK, 0, 1000))
return -ETIMEDOUT;

udelay(2);

val = mt76_rr(dev, base + MT_EFUSE_CTRL);
if ((val & MT_EFUSE_CTRL_AOUT) == MT_EFUSE_CTRL_AOUT ||
WARN_ON_ONCE(!(val & MT_EFUSE_CTRL_VALID))) {
memset(data, 0x0, 16);
return 0;
}

for (i = 0; i < 4; i++) {
val = mt76_rr(dev, base + MT_EFUSE_RDATA(i));
put_unaligned_le32(val, data + 4 * i);
}

return 0;
}

static int mt7615_efuse_init(struct mt7615_dev *dev)
{
u32 base = mt7615_reg_map(dev, MT_EFUSE_BASE);
int len = MT7615_EEPROM_SIZE;
int ret, i;
void *buf;

if (mt76_rr(dev, base + MT_EFUSE_BASE_CTRL) & MT_EFUSE_BASE_CTRL_EMPTY)
return -EINVAL;

dev->mt76.otp.data = devm_kzalloc(dev->mt76.dev, len, GFP_KERNEL);
dev->mt76.otp.size = len;
if (!dev->mt76.otp.data)
return -ENOMEM;

buf = dev->mt76.otp.data;
for (i = 0; i + 16 <= len; i += 16) {
ret = mt7615_efuse_read(dev, base, i, buf + i);
if (ret)
return ret;
}

return 0;
}

static int mt7615_eeprom_load(struct mt7615_dev *dev)
{
int ret;

ret = mt76_eeprom_init(&dev->mt76, MT7615_EEPROM_SIZE);
if (ret < 0)
return ret;

return mt7615_efuse_init(dev);
}

int mt7615_eeprom_init(struct mt7615_dev *dev)
{
int ret;

ret = mt7615_eeprom_load(dev);
if (ret < 0)
return ret;

memcpy(dev->mt76.eeprom.data, dev->mt76.otp.data, MT7615_EEPROM_SIZE);

dev->mt76.cap.has_2ghz = true;
dev->mt76.cap.has_5ghz = true;

memcpy(dev->mt76.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR,
ETH_ALEN);

mt76_eeprom_override(&dev->mt76);

return 0;
}
18 changes: 18 additions & 0 deletions drivers/net/wireless/mediatek/mt76/mt7615/eeprom.h
Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
/* SPDX-License-Identifier: ISC */
/* Copyright (C) 2019 MediaTek Inc. */

#ifndef __MT7615_EEPROM_H
#define __MT7615_EEPROM_H

#include "mt7615.h"

enum mt7615_eeprom_field {
MT_EE_CHIP_ID = 0x000,
MT_EE_VERSION = 0x002,
MT_EE_MAC_ADDR = 0x004,
MT_EE_NIC_CONF_0 = 0x034,

__MT_EE_MAX = 0x3bf
};

#endif

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