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mt76x0: usb files
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Add usb files of mt76x0 driver.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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Stanislaw Gruszka authored and Kalle Valo committed Aug 2, 2018
1 parent a774434 commit ff69c75
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377 changes: 377 additions & 0 deletions drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
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/*
* 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);
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