/* * Copyright (C) 2015 Jakub Kicinski * * 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 #include #include #include "mt7601u.h" #include "usb.h" #include "trace.h" static const 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(0x2955, 0x1003) }, { 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); } /* should be called with vendor_req_mutex held */ static u32 __mt7601u_rr(struct mt7601u_dev *dev, u32 offset) { int ret; u32 val = ~0; WARN_ONCE(offset > USHRT_MAX, "read high off:%08x", offset); 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); trace_reg_read(dev, offset, val); return val; } u32 mt7601u_rr(struct mt7601u_dev *dev, u32 offset) { u32 ret; mutex_lock(&dev->vendor_req_mutex); ret = __mt7601u_rr(dev, offset); mutex_unlock(&dev->vendor_req_mutex); return ret; } /* should be called with vendor_req_mutex held */ static int __mt7601u_vendor_single_wr(struct mt7601u_dev *dev, const u8 req, const u16 offset, const u32 val) { int 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); trace_reg_write(dev, offset, val); return ret; } 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_single_wr(dev, req, offset, val); 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); } u32 mt7601u_rmw(struct mt7601u_dev *dev, u32 offset, u32 mask, u32 val) { mutex_lock(&dev->vendor_req_mutex); val |= __mt7601u_rr(dev, offset) & ~mask; __mt7601u_vendor_single_wr(dev, MT_VEND_WRITE, offset, val); mutex_unlock(&dev->vendor_req_mutex); return val; } u32 mt7601u_rmc(struct mt7601u_dev *dev, u32 offset, u32 mask, u32 val) { u32 reg; mutex_lock(&dev->vendor_req_mutex); reg = __mt7601u_rr(dev, offset); val |= reg & ~mask; if (reg != val) __mt7601u_vendor_single_wr(dev, MT_VEND_WRITE, offset, val); mutex_unlock(&dev->vendor_req_mutex); 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);