mt76x0: usb files

Add usb files of mt76x0 driver.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

2 files changed, 438 insertions, 0 deletions

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