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