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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 "mt7601u.h"
#include "usb.h"
#include "trace.h"
static struct usb_device_id mt7601u_device_table[] = {
{ USB_DEVICE(0x0b05, 0x17d3) },
{ USB_DEVICE(0x0e8d, 0x760a) },
{ USB_DEVICE(0x0e8d, 0x760b) },
{ USB_DEVICE(0x13d3, 0x3431) },
{ USB_DEVICE(0x13d3, 0x3434) },
{ USB_DEVICE(0x148f, 0x7601) },
{ USB_DEVICE(0x148f, 0x760a) },
{ USB_DEVICE(0x148f, 0x760b) },
{ USB_DEVICE(0x148f, 0x760c) },
{ USB_DEVICE(0x148f, 0x760d) },
{ USB_DEVICE(0x2001, 0x3d04) },
{ USB_DEVICE(0x2717, 0x4106) },
{ USB_DEVICE(0x2955, 0x0001) },
{ USB_DEVICE(0x2955, 0x1001) },
{ USB_DEVICE(0x2a5f, 0x1000) },
{ USB_DEVICE(0x7392, 0x7710) },
{ 0, }
};
bool mt7601u_usb_alloc_buf(struct mt7601u_dev *dev, size_t len,
struct mt7601u_dma_buf *buf)
{
struct usb_device *usb_dev = mt7601u_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 mt7601u_usb_free_buf(struct mt7601u_dev *dev, struct mt7601u_dma_buf *buf)
{
struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
usb_free_coherent(usb_dev, buf->len, buf->buf, buf->dma);
usb_free_urb(buf->urb);
}
int mt7601u_usb_submit_buf(struct mt7601u_dev *dev, int dir, int ep_idx,
struct mt7601u_dma_buf *buf, gfp_t gfp,
usb_complete_t complete_fn, void *context)
{
struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
unsigned pipe;
int ret;
if (dir == USB_DIR_IN)
pipe = usb_rcvbulkpipe(usb_dev, dev->in_eps[ep_idx]);
else
pipe = usb_sndbulkpipe(usb_dev, dev->out_eps[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, buf->urb);
ret = usb_submit_urb(buf->urb, gfp);
if (ret)
dev_err(dev->dev, "Error: submit URB dir:%d ep:%d failed:%d\n",
dir, ep_idx, ret);
return ret;
}
void mt7601u_complete_urb(struct urb *urb)
{
struct completion *cmpl = urb->context;
complete(cmpl);
}
int mt7601u_vendor_request(struct mt7601u_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 = mt7601u_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, pipe, req, req_type, val, offset,
buf, buflen, ret);
if (ret == -ENODEV)
set_bit(MT7601U_STATE_REMOVED, &dev->state);
if (ret >= 0 || ret == -ENODEV)
return ret;
msleep(5);
}
dev_err(dev->dev, "Vendor request req:%02x off:%04x failed:%d\n",
req, offset, ret);
return ret;
}
void mt7601u_vendor_reset(struct mt7601u_dev *dev)
{
mt7601u_vendor_request(dev, MT_VEND_DEV_MODE, USB_DIR_OUT,
MT_VEND_DEV_MODE_RESET, 0, NULL, 0);
}
u32 mt7601u_rr(struct mt7601u_dev *dev, u32 offset)
{
int ret;
u32 val = ~0;
WARN_ONCE(offset > USHRT_MAX, "read high off:%08x", offset);
mutex_lock(&dev->vendor_req_mutex);
ret = mt7601u_vendor_request(dev, MT_VEND_MULTI_READ, USB_DIR_IN,
0, offset, dev->vend_buf, MT_VEND_BUF);
if (ret == MT_VEND_BUF)
val = get_unaligned_le32(dev->vend_buf);
else if (ret > 0)
dev_err(dev->dev, "Error: wrong size read:%d off:%08x\n",
ret, offset);
mutex_unlock(&dev->vendor_req_mutex);
trace_reg_read(dev, offset, val);
return val;
}
int mt7601u_vendor_single_wr(struct mt7601u_dev *dev, const u8 req,
const u16 offset, const u32 val)
{
int ret;
mutex_lock(&dev->vendor_req_mutex);
ret = mt7601u_vendor_request(dev, req, USB_DIR_OUT,
val & 0xffff, offset, NULL, 0);
if (!ret)
ret = mt7601u_vendor_request(dev, req, USB_DIR_OUT,
val >> 16, offset + 2, NULL, 0);
mutex_unlock(&dev->vendor_req_mutex);
return ret;
}
void mt7601u_wr(struct mt7601u_dev *dev, u32 offset, u32 val)
{
WARN_ONCE(offset > USHRT_MAX, "write high off:%08x", offset);
mt7601u_vendor_single_wr(dev, MT_VEND_WRITE, offset, val);
trace_reg_write(dev, offset, val);
}
u32 mt7601u_rmw(struct mt7601u_dev *dev, u32 offset, u32 mask, u32 val)
{
val |= mt7601u_rr(dev, offset) & ~mask;
mt7601u_wr(dev, offset, val);
return val;
}
u32 mt7601u_rmc(struct mt7601u_dev *dev, u32 offset, u32 mask, u32 val)
{
u32 reg = mt7601u_rr(dev, offset);
val |= reg & ~mask;
if (reg != val)
mt7601u_wr(dev, offset, val);
return val;
}
void mt7601u_wr_copy(struct mt7601u_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);
mt7601u_burst_write_regs(dev, offset, data, len / 4);
}
void mt7601u_addr_wr(struct mt7601u_dev *dev, const u32 offset, const u8 *addr)
{
mt7601u_wr(dev, offset, get_unaligned_le32(addr));
mt7601u_wr(dev, offset + 4, addr[4] | addr[5] << 8);
}
static int mt7601u_assign_pipes(struct usb_interface *usb_intf,
struct mt7601u_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_eps) < __MT_EP_IN_MAX);
BUILD_BUG_ON(sizeof(dev->out_eps) < __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_eps[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_eps[ep_i - 1] |= USB_DIR_IN;
} else if (usb_endpoint_is_bulk_out(ep_desc) &&
ep_o++ < __MT_EP_OUT_MAX) {
dev->out_eps[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->dev, "Error: wrong pipe number in:%d out:%d\n",
ep_i, ep_o);
return -EINVAL;
}
return 0;
}
static int mt7601u_probe(struct usb_interface *usb_intf,
const struct usb_device_id *id)
{
struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
struct mt7601u_dev *dev;
u32 asic_rev, mac_rev;
int ret;
dev = mt7601u_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->vend_buf = devm_kmalloc(dev->dev, MT_VEND_BUF, GFP_KERNEL);
if (!dev->vend_buf) {
ret = -ENOMEM;
goto err;
}
ret = mt7601u_assign_pipes(usb_intf, dev);
if (ret)
goto err;
ret = mt7601u_wait_asic_ready(dev);
if (ret)
goto err;
asic_rev = mt7601u_rr(dev, MT_ASIC_VERSION);
mac_rev = mt7601u_rr(dev, MT_MAC_CSR0);
dev_info(dev->dev, "ASIC revision: %08x MAC revision: %08x\n",
asic_rev, mac_rev);
/* Note: vendor driver skips this check for MT7601U */
if (!(mt7601u_rr(dev, MT_EFUSE_CTRL) & MT_EFUSE_CTRL_SEL))
dev_warn(dev->dev, "Warning: eFUSE not present\n");
ret = mt7601u_init_hardware(dev);
if (ret)
goto err;
ret = mt7601u_register_device(dev);
if (ret)
goto err_hw;
set_bit(MT7601U_STATE_INITIALIZED, &dev->state);
return 0;
err_hw:
mt7601u_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->hw);
return ret;
}
static void mt7601u_disconnect(struct usb_interface *usb_intf)
{
struct mt7601u_dev *dev = usb_get_intfdata(usb_intf);
ieee80211_unregister_hw(dev->hw);
mt7601u_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->hw);
}
static int mt7601u_suspend(struct usb_interface *usb_intf, pm_message_t state)
{
struct mt7601u_dev *dev = usb_get_intfdata(usb_intf);
mt7601u_cleanup(dev);
return 0;
}
static int mt7601u_resume(struct usb_interface *usb_intf)
{
struct mt7601u_dev *dev = usb_get_intfdata(usb_intf);
int ret;
ret = mt7601u_init_hardware(dev);
if (ret)
return ret;
set_bit(MT7601U_STATE_INITIALIZED, &dev->state);
return 0;
}
MODULE_DEVICE_TABLE(usb, mt7601u_device_table);
MODULE_FIRMWARE(MT7601U_FIRMWARE);
MODULE_LICENSE("GPL");
static struct usb_driver mt7601u_driver = {
.name = KBUILD_MODNAME,
.id_table = mt7601u_device_table,
.probe = mt7601u_probe,
.disconnect = mt7601u_disconnect,
.suspend = mt7601u_suspend,
.resume = mt7601u_resume,
.reset_resume = mt7601u_resume,
.soft_unbind = 1,
.disable_hub_initiated_lpm = 1,
};
module_usb_driver(mt7601u_driver);
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