diff mbox

[04/11] mt76x0: usb files

Message ID 1530771142-4118-5-git-send-email-sgruszka@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Stanislaw Gruszka July 5, 2018, 6:12 a.m. UTC 
Add usb files of mt76x0 driver.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
---
 drivers/net/wireless/mediatek/mt76/mt76x0/usb.c | 377 ++++++++++++++++++++++++
 drivers/net/wireless/mediatek/mt76/mt76x0/usb.h |  61 ++++
 2 files changed, 438 insertions(+)
 create mode 100644 drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
 create mode 100644 drivers/net/wireless/mediatek/mt76/mt76x0/usb.h

Comments

Lorenzo Bianconi July 5, 2018, 3:05 p.m. UTC | #1 
On Jul 05, Stanislaw Gruszka wrote:
> Add usb files of mt76x0 driver.
> 
> Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
> ---
>  drivers/net/wireless/mediatek/mt76/mt76x0/usb.c | 377 ++++++++++++++++++++++++
>  drivers/net/wireless/mediatek/mt76/mt76x0/usb.h |  61 ++++
>  2 files changed, 438 insertions(+)
>  create mode 100644 drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
>  create mode 100644 drivers/net/wireless/mediatek/mt76/mt76x0/usb.h
> 
> diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c b/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
> new file mode 100644
> index 000000000000..0871fdef59c3
> --- /dev/null
> +++ b/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
> @@ -0,0 +1,377 @@
> +/*
> + * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2
> + * as published by the Free Software Foundation
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/usb.h>
> +
> +#include "mt76x0.h"
> +#include "usb.h"
> +#include "trace.h"
> +
> +static struct usb_device_id mt76x0_device_table[] = {
> +	{ USB_DEVICE(0x148F, 0x7610) },	/* MT7610U */
> +	{ USB_DEVICE(0x13B1, 0x003E) },	/* Linksys AE6000 */
> +	{ USB_DEVICE(0x0E8D, 0x7610) },	/* Sabrent NTWLAC */
> +	{ USB_DEVICE(0x7392, 0xa711) },	/* Edimax 7711mac */
> +	{ USB_DEVICE(0x7392, 0xb711) },	/* Edimax / Elecom  */
> +	{ USB_DEVICE(0x148f, 0x761a) },	/* TP-Link TL-WDN5200 */
> +	{ USB_DEVICE(0x148f, 0x760a) },	/* TP-Link unknown */
> +	{ USB_DEVICE(0x0b05, 0x17d1) },	/* Asus USB-AC51 */
> +	{ USB_DEVICE(0x0b05, 0x17db) },	/* Asus USB-AC50 */
> +	{ USB_DEVICE(0x0df6, 0x0075) },	/* Sitecom WLA-3100 */
> +	{ USB_DEVICE(0x2019, 0xab31) },	/* Planex GW-450D */
> +	{ USB_DEVICE(0x2001, 0x3d02) },	/* D-LINK DWA-171 rev B1 */
> +	{ USB_DEVICE(0x0586, 0x3425) },	/* Zyxel NWD6505 */
> +	{ USB_DEVICE(0x07b8, 0x7610) },	/* AboCom AU7212 */
> +	{ USB_DEVICE(0x04bb, 0x0951) },	/* I-O DATA WN-AC433UK */
> +	{ USB_DEVICE(0x057c, 0x8502) },	/* AVM FRITZ!WLAN USB Stick AC 430 */
> +	{ USB_DEVICE(0x293c, 0x5702) },	/* Comcast Xfinity KXW02AAA  */
> +	{ USB_DEVICE(0x20f4, 0x806b) },	/* TRENDnet TEW-806UBH  */
> +	{ USB_DEVICE(0x7392, 0xc711) }, /* Devolo Wifi ac Stick */
> +	{ USB_DEVICE(0x0df6, 0x0079) }, /* Sitecom Europe B.V. ac  Stick */
> +	{ USB_DEVICE(0x2357, 0x0105) }, /* TP-LINK Archer T1U */
> +	{ USB_DEVICE_AND_INTERFACE_INFO(0x0E8D, 0x7630, 0xff, 0x2, 0xff)}, /* MT7630U */
> +	{ USB_DEVICE_AND_INTERFACE_INFO(0x0E8D, 0x7650, 0xff, 0x2, 0xff)}, /* MT7650U */
> +	{ 0, }
> +};
> +
> +bool mt76x0_usb_alloc_buf(struct mt76x0_dev *dev, size_t len,
> +			   struct mt76x0_dma_buf *buf)
> +{
> +	struct usb_device *usb_dev = mt76x0_to_usb_dev(dev);
> +
> +	buf->len = len;
> +	buf->urb = usb_alloc_urb(0, GFP_KERNEL);
> +	buf->buf = usb_alloc_coherent(usb_dev, buf->len, GFP_KERNEL, &buf->dma);
> +
> +	return !buf->urb || !buf->buf;
> +}
> +
> +void mt76x0_usb_free_buf(struct mt76x0_dev *dev, struct mt76x0_dma_buf *buf)
> +{
> +	struct usb_device *usb_dev = mt76x0_to_usb_dev(dev);
> +
> +	usb_free_coherent(usb_dev, buf->len, buf->buf, buf->dma);
> +	usb_free_urb(buf->urb);
> +}
> +
> +int mt76x0_usb_submit_buf(struct mt76x0_dev *dev, int dir, int ep_idx,
> +			   struct mt76x0_dma_buf *buf, gfp_t gfp,
> +			   usb_complete_t complete_fn, void *context)
> +{
> +	struct usb_device *usb_dev = mt76x0_to_usb_dev(dev);
> +	unsigned pipe;
> +	int ret;
> +
> +	if (dir == USB_DIR_IN)
> +		pipe = usb_rcvbulkpipe(usb_dev, dev->in_ep[ep_idx]);
> +	else
> +		pipe = usb_sndbulkpipe(usb_dev, dev->out_ep[ep_idx]);
> +
> +	usb_fill_bulk_urb(buf->urb, usb_dev, pipe, buf->buf, buf->len,
> +			  complete_fn, context);
> +	buf->urb->transfer_dma = buf->dma;
> +	buf->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
> +
> +	trace_mt_submit_urb(&dev->mt76, buf->urb);
> +	ret = usb_submit_urb(buf->urb, gfp);
> +	if (ret)
> +		dev_err(dev->mt76.dev, "Error: submit URB dir:%d ep:%d failed:%d\n",
> +			dir, ep_idx, ret);
> +	return ret;
> +}
> +
> +void mt76x0_complete_urb(struct urb *urb)
> +{
> +	struct completion *cmpl = urb->context;
> +
> +	complete(cmpl);
> +}
> +
> +int mt76x0_vendor_request(struct mt76x0_dev *dev, const u8 req,
> +			   const u8 direction, const u16 val, const u16 offset,
> +			   void *buf, const size_t buflen)
> +{
> +	int i, ret;
> +	struct usb_device *usb_dev = mt76x0_to_usb_dev(dev);
> +	const u8 req_type = direction | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
> +	const unsigned int pipe = (direction == USB_DIR_IN) ?
> +		usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0);
> +
> +	for (i = 0; i < MT_VEND_REQ_MAX_RETRY; i++) {
> +		ret = usb_control_msg(usb_dev, pipe, req, req_type,
> +				      val, offset, buf, buflen,
> +				      MT_VEND_REQ_TOUT_MS);
> +		trace_mt_vend_req(&dev->mt76, pipe, req, req_type, val, offset,
> +				  buf, buflen, ret);
> +
> +		if (ret == -ENODEV)
> +			set_bit(MT76_REMOVED, &dev->mt76.state);
> +		if (ret >= 0 || ret == -ENODEV)
> +			return ret;
> +
> +		msleep(5);
> +	}
> +
> +	dev_err(dev->mt76.dev, "Vendor request req:%02x off:%04x failed:%d\n",
> +		req, offset, ret);
> +
> +	return ret;
> +}
> +
> +void mt76x0_vendor_reset(struct mt76x0_dev *dev)
> +{
> +	mt76x0_vendor_request(dev, MT_VEND_DEV_MODE, USB_DIR_OUT,
> +			      MT_VEND_DEV_MODE_RESET, 0, NULL, 0);
> +}
> +
> +static u32 mt76x0_rr(struct mt76_dev *dev, u32 offset)
> +{
> +	struct mt76x0_dev *mdev = (struct mt76x0_dev *) dev;
> +	int ret;
> +	u32 val = ~0;
> +
> +	WARN_ONCE(offset > USHRT_MAX, "read high off:%08x", offset);
> +
> +	mutex_lock(&mdev->usb_ctrl_mtx);
> +
> +	ret = mt76x0_vendor_request((struct mt76x0_dev *)dev, MT_VEND_MULTI_READ, USB_DIR_IN,
> +				    0, offset, mdev->data, MT_VEND_BUF);
> +	if (ret == MT_VEND_BUF)
> +		val = get_unaligned_le32(mdev->data);
> +	else if (ret > 0)
> +		dev_err(dev->dev, "Error: wrong size read:%d off:%08x\n",
> +			ret, offset);
> +
> +	mutex_unlock(&mdev->usb_ctrl_mtx);
> +
> +	trace_reg_read(dev, offset, val);
> +	return val;
> +}
> +
> +int mt76x0_vendor_single_wr(struct mt76x0_dev *dev, const u8 req,
> +			     const u16 offset, const u32 val)
> +{
> +	struct mt76x0_dev *mdev = dev;
> +	int ret;
> +
> +	mutex_lock(&mdev->usb_ctrl_mtx);
> +
> +	ret = mt76x0_vendor_request(dev, req, USB_DIR_OUT,
> +				    val & 0xffff, offset, NULL, 0);
> +	if (!ret)
> +		ret = mt76x0_vendor_request(dev, req, USB_DIR_OUT,
> +					    val >> 16, offset + 2, NULL, 0);
> +
> +	mutex_unlock(&mdev->usb_ctrl_mtx);
> +
> +	return ret;
> +}
> +
> +static void mt76x0_wr(struct mt76_dev *dev, u32 offset, u32 val)
> +{
> +	struct mt76x0_dev *mdev = (struct mt76x0_dev *) dev;
> +	int ret;
> +
> +	WARN_ONCE(offset > USHRT_MAX, "write high off:%08x", offset);
> +
> +	mutex_lock(&mdev->usb_ctrl_mtx);
> +
> +	put_unaligned_le32(val, mdev->data);
> +	ret = mt76x0_vendor_request(mdev, MT_VEND_MULTI_WRITE, USB_DIR_OUT,
> +				    0, offset, mdev->data, MT_VEND_BUF);
> +	trace_reg_write(dev, offset, val);
> +
> +	mutex_unlock(&mdev->usb_ctrl_mtx);
> +}
> +
> +static u32 mt76x0_rmw(struct mt76_dev *dev, u32 offset, u32 mask, u32 val)
> +{
> +	val |= mt76x0_rr(dev, offset) & ~mask;
> +	mt76x0_wr(dev, offset, val);
> +	return val;
> +}
> +
> +static void mt76x0_wr_copy(struct mt76_dev *dev, u32 offset,
> +			   const void *data, int len)
> +{
> +	WARN_ONCE(offset & 3, "unaligned write copy off:%08x", offset);
> +	WARN_ONCE(len & 3, "short write copy off:%08x", offset);
> +
> +	mt76x0_burst_write_regs((struct mt76x0_dev *) dev, offset, data, len / 4);
> +}
> +
> +void mt76x0_addr_wr(struct mt76x0_dev *dev, const u32 offset, const u8 *addr)
> +{
> +	mt76_wr(dev, offset, get_unaligned_le32(addr));
> +	mt76_wr(dev, offset + 4, addr[4] | addr[5] << 8);
> +}
> +
> +static int mt76x0_assign_pipes(struct usb_interface *usb_intf,
> +				struct mt76x0_dev *dev)
> +{
> +	struct usb_endpoint_descriptor *ep_desc;
> +	struct usb_host_interface *intf_desc = usb_intf->cur_altsetting;
> +	unsigned i, ep_i = 0, ep_o = 0;
> +
> +	BUILD_BUG_ON(sizeof(dev->in_ep) < __MT_EP_IN_MAX);
> +	BUILD_BUG_ON(sizeof(dev->out_ep) < __MT_EP_OUT_MAX);
> +
> +	for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
> +		ep_desc = &intf_desc->endpoint[i].desc;
> +
> +		if (usb_endpoint_is_bulk_in(ep_desc) &&
> +		    ep_i++ < __MT_EP_IN_MAX) {
> +			dev->in_ep[ep_i - 1] = usb_endpoint_num(ep_desc);
> +			dev->in_max_packet = usb_endpoint_maxp(ep_desc);
> +			/* Note: this is ignored by usb sub-system but vendor
> +			 *	 code does it. We can drop this at some point.
> +			 */
> +			dev->in_ep[ep_i - 1] |= USB_DIR_IN;
> +		} else if (usb_endpoint_is_bulk_out(ep_desc) &&
> +			   ep_o++ < __MT_EP_OUT_MAX) {
> +			dev->out_ep[ep_o - 1] = usb_endpoint_num(ep_desc);
> +			dev->out_max_packet = usb_endpoint_maxp(ep_desc);
> +		}
> +	}
> +
> +	if (ep_i != __MT_EP_IN_MAX || ep_o != __MT_EP_OUT_MAX) {
> +		dev_err(dev->mt76.dev, "Error: wrong pipe number in:%d out:%d\n",
> +			ep_i, ep_o);
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +static int mt76x0_probe(struct usb_interface *usb_intf,
> +			 const struct usb_device_id *id)
> +{
> +	struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
> +	struct mt76x0_dev *dev;
> +	u32 asic_rev, mac_rev;
> +	int ret;
> +	static const struct mt76_bus_ops usb_ops = {
> +		.rr = mt76x0_rr,
> +		.wr = mt76x0_wr,
> +		.rmw = mt76x0_rmw,
> +		.copy = mt76x0_wr_copy,
> +	};
> +
> +	dev = mt76x0_alloc_device(&usb_intf->dev);
> +	if (!dev)
> +		return -ENOMEM;
> +
> +	usb_dev = usb_get_dev(usb_dev);
> +	usb_reset_device(usb_dev);
> +
> +	usb_set_intfdata(usb_intf, dev);
> +
> +	dev->mt76.bus = &usb_ops;
> +
> +	ret = mt76x0_assign_pipes(usb_intf, dev);
> +	if (ret)
> +		goto err;
> +	ret = mt76x0_wait_asic_ready(dev);
> +	if (ret)
> +		goto err;
> +
> +	asic_rev = mt76_rr(dev, MT_ASIC_VERSION);
> +	mac_rev = mt76_rr(dev, MT_MAC_CSR0);
> +	dev_info(dev->mt76.dev, "ASIC revision: %08x MAC revision: %08x\n",
> +		 asic_rev, mac_rev);
> +
> +	/* Note: vendor driver skips this check for MT76X0U */
> +	if (!(mt76_rr(dev, MT_EFUSE_CTRL) & MT_EFUSE_CTRL_SEL))
> +		dev_warn(dev->mt76.dev, "Warning: eFUSE not present\n");
> +
> +	ret = mt76x0_init_hardware(dev);
> +	if (ret)
> +		goto err;
> +
> +	ret = mt76x0_register_device(dev);
> +	if (ret)
> +		goto err_hw;
> +
> +	set_bit(MT76_STATE_INITIALIZED, &dev->mt76.state);
> +
> +	return 0;
> +err_hw:
> +	mt76x0_cleanup(dev);
> +err:
> +	usb_set_intfdata(usb_intf, NULL);
> +	usb_put_dev(interface_to_usbdev(usb_intf));
> +
> +	destroy_workqueue(dev->stat_wq);
> +	ieee80211_free_hw(dev->mt76.hw);
> +	return ret;
> +}
> +
> +static void mt76x0_disconnect(struct usb_interface *usb_intf)
> +{
> +	struct mt76x0_dev *dev = usb_get_intfdata(usb_intf);
> +	bool initalized = test_bit(MT76_STATE_INITIALIZED, &dev->mt76.state);
> +
> +	if (!initalized)
> +		return;
> +
> +	ieee80211_unregister_hw(dev->mt76.hw);
> +	mt76x0_cleanup(dev);
> +
> +	usb_set_intfdata(usb_intf, NULL);
> +	usb_put_dev(interface_to_usbdev(usb_intf));
> +
> +	destroy_workqueue(dev->stat_wq);
> +	ieee80211_free_hw(dev->mt76.hw);
> +}
> +
> +static int mt76x0_suspend(struct usb_interface *usb_intf, pm_message_t state)
> +{
> +	struct mt76x0_dev *dev = usb_get_intfdata(usb_intf);
> +
> +	mt76x0_cleanup(dev);

Is it necessary to deallocate rx queue here in case of a system suspend?

> +
> +	return 0;
> +}
> +
> +static int mt76x0_resume(struct usb_interface *usb_intf)
> +{
> +	struct mt76x0_dev *dev = usb_get_intfdata(usb_intf);
> +	int ret;
> +
> +	ret = mt76x0_init_hardware(dev);
> +	if (ret)
> +		return ret;
> +
> +	set_bit(MT76_STATE_INITIALIZED, &dev->mt76.state);
> +
> +	return 0;
> +}
> +
> +MODULE_DEVICE_TABLE(usb, mt76x0_device_table);
> +MODULE_FIRMWARE(MT7610_FIRMWARE);
> +MODULE_LICENSE("GPL");
> +
> +static struct usb_driver mt76x0_driver = {
> +	.name		= KBUILD_MODNAME,
> +	.id_table	= mt76x0_device_table,
> +	.probe		= mt76x0_probe,
> +	.disconnect	= mt76x0_disconnect,
> +	.suspend	= mt76x0_suspend,
> +	.resume		= mt76x0_resume,
> +	.reset_resume	= mt76x0_resume,
> +	.soft_unbind	= 1,
> +	.disable_hub_initiated_lpm = 1,
> +};
> +module_usb_driver(mt76x0_driver);
> diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/usb.h b/drivers/net/wireless/mediatek/mt76/mt76x0/usb.h
> new file mode 100644
> index 000000000000..9e42dfa665de
> --- /dev/null
> +++ b/drivers/net/wireless/mediatek/mt76/mt76x0/usb.h
> @@ -0,0 +1,61 @@
> +/*
> + * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2
> + * as published by the Free Software Foundation
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#ifndef __MT76X0U_USB_H
> +#define __MT76X0U_USB_H
> +
> +#include "mt76x0.h"
> +
> +#define MT7610_FIRMWARE	"mt7610.bin"
> +
> +#define MT_VEND_REQ_MAX_RETRY	10
> +#define MT_VEND_REQ_TOUT_MS	300
> +
> +#define MT_VEND_DEV_MODE_RESET	1
> +
> +#define MT_VEND_BUF		sizeof(__le32)
> +
> +static inline struct usb_device *mt76x0_to_usb_dev(struct mt76x0_dev *mt76x0)
> +{
> +	return interface_to_usbdev(to_usb_interface(mt76x0->mt76.dev));
> +}
> +
> +static inline struct usb_device *mt76_to_usb_dev(struct mt76_dev *mt76)
> +{
> +	return interface_to_usbdev(to_usb_interface(mt76->dev));
> +}
> +
> +static inline bool mt76x0_urb_has_error(struct urb *urb)
> +{
> +	return urb->status &&
> +		urb->status != -ENOENT &&
> +		urb->status != -ECONNRESET &&
> +		urb->status != -ESHUTDOWN;
> +}
> +
> +bool mt76x0_usb_alloc_buf(struct mt76x0_dev *dev, size_t len,
> +			   struct mt76x0_dma_buf *buf);
> +void mt76x0_usb_free_buf(struct mt76x0_dev *dev, struct mt76x0_dma_buf *buf);
> +int mt76x0_usb_submit_buf(struct mt76x0_dev *dev, int dir, int ep_idx,
> +			   struct mt76x0_dma_buf *buf, gfp_t gfp,
> +			   usb_complete_t complete_fn, void *context);
> +void mt76x0_complete_urb(struct urb *urb);
> +
> +int mt76x0_vendor_request(struct mt76x0_dev *dev, const u8 req,
> +			   const u8 direction, const u16 val, const u16 offset,
> +			   void *buf, const size_t buflen);
> +void mt76x0_vendor_reset(struct mt76x0_dev *dev);
> +int mt76x0_vendor_single_wr(struct mt76x0_dev *dev, const u8 req,
> +			     const u16 offset, const u32 val);
> +
> +#endif
> -- 
> 1.9.3
>
Stanislaw Gruszka July 6, 2018, 10:42 a.m. UTC | #2 
On Thu, Jul 05, 2018 at 05:05:20PM +0200, Lorenzo Bianconi wrote:
> > +static int mt76x0_suspend(struct usb_interface *usb_intf, pm_message_t state)
> > +{
> > +	struct mt76x0_dev *dev = usb_get_intfdata(usb_intf);
> > +
> > +	mt76x0_cleanup(dev);
> 
> Is it necessary to deallocate rx queue here in case of a system suspend?
> 

It's not optimal, but allow to utilize initialization and cleanup
routines in resume/suspend.

Regards.
Stanislaw
Kalle Valo July 23, 2018, 6:38 a.m. UTC | #3 
Lorenzo Bianconi <lorenzo.bianconi@redhat.com> writes:

> On Jul 05, Stanislaw Gruszka wrote:
>> Add usb files of mt76x0 driver.
>> 
>> Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>

[...]

>> +static int mt76x0_suspend(struct usb_interface *usb_intf, pm_message_t state)
>> +{
>> +	struct mt76x0_dev *dev = usb_get_intfdata(usb_intf);
>> +
>> +	mt76x0_cleanup(dev);
>
> Is it necessary to deallocate rx queue here in case of a system suspend?

BTW it would really helpful to others if you could edit your quotes. It
takes some time to find your oneliner from a 450 line message.
Lorenzo Bianconi July 23, 2018, 8:57 a.m. UTC | #4 
>
> Lorenzo Bianconi <lorenzo.bianconi@redhat.com> writes:
>
> > On Jul 05, Stanislaw Gruszka wrote:
> >> Add usb files of mt76x0 driver.
> >>
> >> Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
>
> [...]
>
> >> +static int mt76x0_suspend(struct usb_interface *usb_intf, pm_message_t state)
> >> +{
> >> +    struct mt76x0_dev *dev = usb_get_intfdata(usb_intf);
> >> +
> >> +    mt76x0_cleanup(dev);
> >
> > Is it necessary to deallocate rx queue here in case of a system suspend?
>
> BTW it would really helpful to others if you could edit your quotes. It
> takes some time to find your oneliner from a 450 line message.

Ack sorry, I will be more verbose next time :).
I mean that AFAIU it is not necessary to deallocate all buffers in the rx queue
during suspend/resume (using mt76x0_cleanup routine) but we can just mark them
as 'free' and reuse them as soon as the hw is resumed. I guess the same approach
can be used for mcu rx buffer.

Regards,
Lorenzo
>
> --
> Kalle Valo
Kalle Valo July 23, 2018, 9:07 a.m. UTC | #5 
Lorenzo Bianconi <lorenzo.bianconi@redhat.com> writes:

>>
>> Lorenzo Bianconi <lorenzo.bianconi@redhat.com> writes:
>>
>> > On Jul 05, Stanislaw Gruszka wrote:
>> >> Add usb files of mt76x0 driver.
>> >>
>> >> Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
>>
>> [...]
>>
>> >> +static int mt76x0_suspend(struct usb_interface *usb_intf, pm_message_t state)
>> >> +{
>> >> +    struct mt76x0_dev *dev = usb_get_intfdata(usb_intf);
>> >> +
>> >> +    mt76x0_cleanup(dev);
>> >
>> > Is it necessary to deallocate rx queue here in case of a system suspend?
>>
>> BTW it would really helpful to others if you could edit your quotes. It
>> takes some time to find your oneliner from a 450 line message.
>
> Ack sorry, I will be more verbose next time :).

I think you misunderstood, I actually was asking to be less verbose :)

The oneliner was just fine. I was just suggesting that instead of
sending a message with 400 lines trim the unnecessary quotation and just
send a shorter 50 line message. That way you save a lot of time (and
avoid frustration) for the people reading your mail.
Lorenzo Bianconi July 23, 2018, 9:31 a.m. UTC | #6 
> Lorenzo Bianconi <lorenzo.bianconi@redhat.com> writes:
> 
> >>
> >> Lorenzo Bianconi <lorenzo.bianconi@redhat.com> writes:
> >>
> >> > On Jul 05, Stanislaw Gruszka wrote:
> >> >> Add usb files of mt76x0 driver.
> >> >>
> >> >> Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
> >>
> >> [...]
> >>
> >> >> +static int mt76x0_suspend(struct usb_interface *usb_intf, pm_message_t state)
> >> >> +{
> >> >> +    struct mt76x0_dev *dev = usb_get_intfdata(usb_intf);
> >> >> +
> >> >> +    mt76x0_cleanup(dev);
> >> >
> >> > Is it necessary to deallocate rx queue here in case of a system suspend?
> >>
> >> BTW it would really helpful to others if you could edit your quotes. It
> >> takes some time to find your oneliner from a 450 line message.
> >
> > Ack sorry, I will be more verbose next time :).
> 
> I think you misunderstood, I actually was asking to be less verbose :)
> 
> The oneliner was just fine. I was just suggesting that instead of
> sending a message with 400 lines trim the unnecessary quotation and just
> send a shorter 50 line message. That way you save a lot of time (and
> avoid frustration) for the people reading your mail.

Ops, I completely misunderstood, will do next time sorry :)

Regards,
Lorenzo

> 
> -- 
> Kalle Valo
diff mbox

Patch

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c b/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
new file mode 100644
index 000000000000..0871fdef59c3
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
@@ -0,0 +1,377 @@ 
+/*
+ * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+
+#include "mt76x0.h"
+#include "usb.h"
+#include "trace.h"
+
+static struct usb_device_id mt76x0_device_table[] = {
+	{ USB_DEVICE(0x148F, 0x7610) },	/* MT7610U */
+	{ USB_DEVICE(0x13B1, 0x003E) },	/* Linksys AE6000 */
+	{ USB_DEVICE(0x0E8D, 0x7610) },	/* Sabrent NTWLAC */
+	{ USB_DEVICE(0x7392, 0xa711) },	/* Edimax 7711mac */
+	{ USB_DEVICE(0x7392, 0xb711) },	/* Edimax / Elecom  */
+	{ USB_DEVICE(0x148f, 0x761a) },	/* TP-Link TL-WDN5200 */
+	{ USB_DEVICE(0x148f, 0x760a) },	/* TP-Link unknown */
+	{ USB_DEVICE(0x0b05, 0x17d1) },	/* Asus USB-AC51 */
+	{ USB_DEVICE(0x0b05, 0x17db) },	/* Asus USB-AC50 */
+	{ USB_DEVICE(0x0df6, 0x0075) },	/* Sitecom WLA-3100 */
+	{ USB_DEVICE(0x2019, 0xab31) },	/* Planex GW-450D */
+	{ USB_DEVICE(0x2001, 0x3d02) },	/* D-LINK DWA-171 rev B1 */
+	{ USB_DEVICE(0x0586, 0x3425) },	/* Zyxel NWD6505 */
+	{ USB_DEVICE(0x07b8, 0x7610) },	/* AboCom AU7212 */
+	{ USB_DEVICE(0x04bb, 0x0951) },	/* I-O DATA WN-AC433UK */
+	{ USB_DEVICE(0x057c, 0x8502) },	/* AVM FRITZ!WLAN USB Stick AC 430 */
+	{ USB_DEVICE(0x293c, 0x5702) },	/* Comcast Xfinity KXW02AAA  */
+	{ USB_DEVICE(0x20f4, 0x806b) },	/* TRENDnet TEW-806UBH  */
+	{ USB_DEVICE(0x7392, 0xc711) }, /* Devolo Wifi ac Stick */
+	{ USB_DEVICE(0x0df6, 0x0079) }, /* Sitecom Europe B.V. ac  Stick */
+	{ USB_DEVICE(0x2357, 0x0105) }, /* TP-LINK Archer T1U */
+	{ USB_DEVICE_AND_INTERFACE_INFO(0x0E8D, 0x7630, 0xff, 0x2, 0xff)}, /* MT7630U */
+	{ USB_DEVICE_AND_INTERFACE_INFO(0x0E8D, 0x7650, 0xff, 0x2, 0xff)}, /* MT7650U */
+	{ 0, }
+};
+
+bool mt76x0_usb_alloc_buf(struct mt76x0_dev *dev, size_t len,
+			   struct mt76x0_dma_buf *buf)
+{
+	struct usb_device *usb_dev = mt76x0_to_usb_dev(dev);
+
+	buf->len = len;
+	buf->urb = usb_alloc_urb(0, GFP_KERNEL);
+	buf->buf = usb_alloc_coherent(usb_dev, buf->len, GFP_KERNEL, &buf->dma);
+
+	return !buf->urb || !buf->buf;
+}
+
+void mt76x0_usb_free_buf(struct mt76x0_dev *dev, struct mt76x0_dma_buf *buf)
+{
+	struct usb_device *usb_dev = mt76x0_to_usb_dev(dev);
+
+	usb_free_coherent(usb_dev, buf->len, buf->buf, buf->dma);
+	usb_free_urb(buf->urb);
+}
+
+int mt76x0_usb_submit_buf(struct mt76x0_dev *dev, int dir, int ep_idx,
+			   struct mt76x0_dma_buf *buf, gfp_t gfp,
+			   usb_complete_t complete_fn, void *context)
+{
+	struct usb_device *usb_dev = mt76x0_to_usb_dev(dev);
+	unsigned pipe;
+	int ret;
+
+	if (dir == USB_DIR_IN)
+		pipe = usb_rcvbulkpipe(usb_dev, dev->in_ep[ep_idx]);
+	else
+		pipe = usb_sndbulkpipe(usb_dev, dev->out_ep[ep_idx]);
+
+	usb_fill_bulk_urb(buf->urb, usb_dev, pipe, buf->buf, buf->len,
+			  complete_fn, context);
+	buf->urb->transfer_dma = buf->dma;
+	buf->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	trace_mt_submit_urb(&dev->mt76, buf->urb);
+	ret = usb_submit_urb(buf->urb, gfp);
+	if (ret)
+		dev_err(dev->mt76.dev, "Error: submit URB dir:%d ep:%d failed:%d\n",
+			dir, ep_idx, ret);
+	return ret;
+}
+
+void mt76x0_complete_urb(struct urb *urb)
+{
+	struct completion *cmpl = urb->context;
+
+	complete(cmpl);
+}
+
+int mt76x0_vendor_request(struct mt76x0_dev *dev, const u8 req,
+			   const u8 direction, const u16 val, const u16 offset,
+			   void *buf, const size_t buflen)
+{
+	int i, ret;
+	struct usb_device *usb_dev = mt76x0_to_usb_dev(dev);
+	const u8 req_type = direction | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
+	const unsigned int pipe = (direction == USB_DIR_IN) ?
+		usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0);
+
+	for (i = 0; i < MT_VEND_REQ_MAX_RETRY; i++) {
+		ret = usb_control_msg(usb_dev, pipe, req, req_type,
+				      val, offset, buf, buflen,
+				      MT_VEND_REQ_TOUT_MS);
+		trace_mt_vend_req(&dev->mt76, pipe, req, req_type, val, offset,
+				  buf, buflen, ret);
+
+		if (ret == -ENODEV)
+			set_bit(MT76_REMOVED, &dev->mt76.state);
+		if (ret >= 0 || ret == -ENODEV)
+			return ret;
+
+		msleep(5);
+	}
+
+	dev_err(dev->mt76.dev, "Vendor request req:%02x off:%04x failed:%d\n",
+		req, offset, ret);
+
+	return ret;
+}
+
+void mt76x0_vendor_reset(struct mt76x0_dev *dev)
+{
+	mt76x0_vendor_request(dev, MT_VEND_DEV_MODE, USB_DIR_OUT,
+			      MT_VEND_DEV_MODE_RESET, 0, NULL, 0);
+}
+
+static u32 mt76x0_rr(struct mt76_dev *dev, u32 offset)
+{
+	struct mt76x0_dev *mdev = (struct mt76x0_dev *) dev;
+	int ret;
+	u32 val = ~0;
+
+	WARN_ONCE(offset > USHRT_MAX, "read high off:%08x", offset);
+
+	mutex_lock(&mdev->usb_ctrl_mtx);
+
+	ret = mt76x0_vendor_request((struct mt76x0_dev *)dev, MT_VEND_MULTI_READ, USB_DIR_IN,
+				    0, offset, mdev->data, MT_VEND_BUF);
+	if (ret == MT_VEND_BUF)
+		val = get_unaligned_le32(mdev->data);
+	else if (ret > 0)
+		dev_err(dev->dev, "Error: wrong size read:%d off:%08x\n",
+			ret, offset);
+
+	mutex_unlock(&mdev->usb_ctrl_mtx);
+
+	trace_reg_read(dev, offset, val);
+	return val;
+}
+
+int mt76x0_vendor_single_wr(struct mt76x0_dev *dev, const u8 req,
+			     const u16 offset, const u32 val)
+{
+	struct mt76x0_dev *mdev = dev;
+	int ret;
+
+	mutex_lock(&mdev->usb_ctrl_mtx);
+
+	ret = mt76x0_vendor_request(dev, req, USB_DIR_OUT,
+				    val & 0xffff, offset, NULL, 0);
+	if (!ret)
+		ret = mt76x0_vendor_request(dev, req, USB_DIR_OUT,
+					    val >> 16, offset + 2, NULL, 0);
+
+	mutex_unlock(&mdev->usb_ctrl_mtx);
+
+	return ret;
+}
+
+static void mt76x0_wr(struct mt76_dev *dev, u32 offset, u32 val)
+{
+	struct mt76x0_dev *mdev = (struct mt76x0_dev *) dev;
+	int ret;
+
+	WARN_ONCE(offset > USHRT_MAX, "write high off:%08x", offset);
+
+	mutex_lock(&mdev->usb_ctrl_mtx);
+
+	put_unaligned_le32(val, mdev->data);
+	ret = mt76x0_vendor_request(mdev, MT_VEND_MULTI_WRITE, USB_DIR_OUT,
+				    0, offset, mdev->data, MT_VEND_BUF);
+	trace_reg_write(dev, offset, val);
+
+	mutex_unlock(&mdev->usb_ctrl_mtx);
+}
+
+static u32 mt76x0_rmw(struct mt76_dev *dev, u32 offset, u32 mask, u32 val)
+{
+	val |= mt76x0_rr(dev, offset) & ~mask;
+	mt76x0_wr(dev, offset, val);
+	return val;
+}
+
+static void mt76x0_wr_copy(struct mt76_dev *dev, u32 offset,
+			   const void *data, int len)
+{
+	WARN_ONCE(offset & 3, "unaligned write copy off:%08x", offset);
+	WARN_ONCE(len & 3, "short write copy off:%08x", offset);
+
+	mt76x0_burst_write_regs((struct mt76x0_dev *) dev, offset, data, len / 4);
+}
+
+void mt76x0_addr_wr(struct mt76x0_dev *dev, const u32 offset, const u8 *addr)
+{
+	mt76_wr(dev, offset, get_unaligned_le32(addr));
+	mt76_wr(dev, offset + 4, addr[4] | addr[5] << 8);
+}
+
+static int mt76x0_assign_pipes(struct usb_interface *usb_intf,
+				struct mt76x0_dev *dev)
+{
+	struct usb_endpoint_descriptor *ep_desc;
+	struct usb_host_interface *intf_desc = usb_intf->cur_altsetting;
+	unsigned i, ep_i = 0, ep_o = 0;
+
+	BUILD_BUG_ON(sizeof(dev->in_ep) < __MT_EP_IN_MAX);
+	BUILD_BUG_ON(sizeof(dev->out_ep) < __MT_EP_OUT_MAX);
+
+	for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
+		ep_desc = &intf_desc->endpoint[i].desc;
+
+		if (usb_endpoint_is_bulk_in(ep_desc) &&
+		    ep_i++ < __MT_EP_IN_MAX) {
+			dev->in_ep[ep_i - 1] = usb_endpoint_num(ep_desc);
+			dev->in_max_packet = usb_endpoint_maxp(ep_desc);
+			/* Note: this is ignored by usb sub-system but vendor
+			 *	 code does it. We can drop this at some point.
+			 */
+			dev->in_ep[ep_i - 1] |= USB_DIR_IN;
+		} else if (usb_endpoint_is_bulk_out(ep_desc) &&
+			   ep_o++ < __MT_EP_OUT_MAX) {
+			dev->out_ep[ep_o - 1] = usb_endpoint_num(ep_desc);
+			dev->out_max_packet = usb_endpoint_maxp(ep_desc);
+		}
+	}
+
+	if (ep_i != __MT_EP_IN_MAX || ep_o != __MT_EP_OUT_MAX) {
+		dev_err(dev->mt76.dev, "Error: wrong pipe number in:%d out:%d\n",
+			ep_i, ep_o);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int mt76x0_probe(struct usb_interface *usb_intf,
+			 const struct usb_device_id *id)
+{
+	struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
+	struct mt76x0_dev *dev;
+	u32 asic_rev, mac_rev;
+	int ret;
+	static const struct mt76_bus_ops usb_ops = {
+		.rr = mt76x0_rr,
+		.wr = mt76x0_wr,
+		.rmw = mt76x0_rmw,
+		.copy = mt76x0_wr_copy,
+	};
+
+	dev = mt76x0_alloc_device(&usb_intf->dev);
+	if (!dev)
+		return -ENOMEM;
+
+	usb_dev = usb_get_dev(usb_dev);
+	usb_reset_device(usb_dev);
+
+	usb_set_intfdata(usb_intf, dev);
+
+	dev->mt76.bus = &usb_ops;
+
+	ret = mt76x0_assign_pipes(usb_intf, dev);
+	if (ret)
+		goto err;
+	ret = mt76x0_wait_asic_ready(dev);
+	if (ret)
+		goto err;
+
+	asic_rev = mt76_rr(dev, MT_ASIC_VERSION);
+	mac_rev = mt76_rr(dev, MT_MAC_CSR0);
+	dev_info(dev->mt76.dev, "ASIC revision: %08x MAC revision: %08x\n",
+		 asic_rev, mac_rev);
+
+	/* Note: vendor driver skips this check for MT76X0U */
+	if (!(mt76_rr(dev, MT_EFUSE_CTRL) & MT_EFUSE_CTRL_SEL))
+		dev_warn(dev->mt76.dev, "Warning: eFUSE not present\n");
+
+	ret = mt76x0_init_hardware(dev);
+	if (ret)
+		goto err;
+
+	ret = mt76x0_register_device(dev);
+	if (ret)
+		goto err_hw;
+
+	set_bit(MT76_STATE_INITIALIZED, &dev->mt76.state);
+
+	return 0;
+err_hw:
+	mt76x0_cleanup(dev);
+err:
+	usb_set_intfdata(usb_intf, NULL);
+	usb_put_dev(interface_to_usbdev(usb_intf));
+
+	destroy_workqueue(dev->stat_wq);
+	ieee80211_free_hw(dev->mt76.hw);
+	return ret;
+}
+
+static void mt76x0_disconnect(struct usb_interface *usb_intf)
+{
+	struct mt76x0_dev *dev = usb_get_intfdata(usb_intf);
+	bool initalized = test_bit(MT76_STATE_INITIALIZED, &dev->mt76.state);
+
+	if (!initalized)
+		return;
+
+	ieee80211_unregister_hw(dev->mt76.hw);
+	mt76x0_cleanup(dev);
+
+	usb_set_intfdata(usb_intf, NULL);
+	usb_put_dev(interface_to_usbdev(usb_intf));
+
+	destroy_workqueue(dev->stat_wq);
+	ieee80211_free_hw(dev->mt76.hw);
+}
+
+static int mt76x0_suspend(struct usb_interface *usb_intf, pm_message_t state)
+{
+	struct mt76x0_dev *dev = usb_get_intfdata(usb_intf);
+
+	mt76x0_cleanup(dev);
+
+	return 0;
+}
+
+static int mt76x0_resume(struct usb_interface *usb_intf)
+{
+	struct mt76x0_dev *dev = usb_get_intfdata(usb_intf);
+	int ret;
+
+	ret = mt76x0_init_hardware(dev);
+	if (ret)
+		return ret;
+
+	set_bit(MT76_STATE_INITIALIZED, &dev->mt76.state);
+
+	return 0;
+}
+
+MODULE_DEVICE_TABLE(usb, mt76x0_device_table);
+MODULE_FIRMWARE(MT7610_FIRMWARE);
+MODULE_LICENSE("GPL");
+
+static struct usb_driver mt76x0_driver = {
+	.name		= KBUILD_MODNAME,
+	.id_table	= mt76x0_device_table,
+	.probe		= mt76x0_probe,
+	.disconnect	= mt76x0_disconnect,
+	.suspend	= mt76x0_suspend,
+	.resume		= mt76x0_resume,
+	.reset_resume	= mt76x0_resume,
+	.soft_unbind	= 1,
+	.disable_hub_initiated_lpm = 1,
+};
+module_usb_driver(mt76x0_driver);
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/usb.h b/drivers/net/wireless/mediatek/mt76/mt76x0/usb.h
new file mode 100644
index 000000000000..9e42dfa665de
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/usb.h
@@ -0,0 +1,61 @@ 
+/*
+ * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MT76X0U_USB_H
+#define __MT76X0U_USB_H
+
+#include "mt76x0.h"
+
+#define MT7610_FIRMWARE	"mt7610.bin"
+
+#define MT_VEND_REQ_MAX_RETRY	10
+#define MT_VEND_REQ_TOUT_MS	300
+
+#define MT_VEND_DEV_MODE_RESET	1
+
+#define MT_VEND_BUF		sizeof(__le32)
+
+static inline struct usb_device *mt76x0_to_usb_dev(struct mt76x0_dev *mt76x0)
+{
+	return interface_to_usbdev(to_usb_interface(mt76x0->mt76.dev));
+}
+
+static inline struct usb_device *mt76_to_usb_dev(struct mt76_dev *mt76)
+{
+	return interface_to_usbdev(to_usb_interface(mt76->dev));
+}
+
+static inline bool mt76x0_urb_has_error(struct urb *urb)
+{
+	return urb->status &&
+		urb->status != -ENOENT &&
+		urb->status != -ECONNRESET &&
+		urb->status != -ESHUTDOWN;
+}
+
+bool mt76x0_usb_alloc_buf(struct mt76x0_dev *dev, size_t len,
+			   struct mt76x0_dma_buf *buf);
+void mt76x0_usb_free_buf(struct mt76x0_dev *dev, struct mt76x0_dma_buf *buf);
+int mt76x0_usb_submit_buf(struct mt76x0_dev *dev, int dir, int ep_idx,
+			   struct mt76x0_dma_buf *buf, gfp_t gfp,
+			   usb_complete_t complete_fn, void *context);
+void mt76x0_complete_urb(struct urb *urb);
+
+int mt76x0_vendor_request(struct mt76x0_dev *dev, const u8 req,
+			   const u8 direction, const u16 val, const u16 offset,
+			   void *buf, const size_t buflen);
+void mt76x0_vendor_reset(struct mt76x0_dev *dev);
+int mt76x0_vendor_single_wr(struct mt76x0_dev *dev, const u8 req,
+			     const u16 offset, const u32 val);
+
+#endif