forked from Minki/linux
1ccea77e2a
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version 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 you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version 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 [based] [from] [clk] [highbank] [c] you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 355 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154041.837383322@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
374 lines
11 KiB
C
374 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2002 Pavel Machek <pavel@ucw.cz>
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* Copyright (C) 2002-2005 by David Brownell
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*/
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// #define DEBUG // error path messages, extra info
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// #define VERBOSE // more; success messages
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/ethtool.h>
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#include <linux/workqueue.h>
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#include <linux/mii.h>
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#include <linux/crc32.h>
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#include <linux/usb.h>
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#include <linux/usb/cdc.h>
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#include <linux/usb/usbnet.h>
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/*
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* All known Zaurii lie about their standards conformance. At least
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* the earliest SA-1100 models lie by saying they support CDC Ethernet.
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* Some later models (especially PXA-25x and PXA-27x based ones) lie
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* and say they support CDC MDLM (for access to cell phone modems).
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*
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* There are non-Zaurus products that use these same protocols too.
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*
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* The annoying thing is that at the same time Sharp was developing
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* that annoying standards-breaking software, the Linux community had
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* a simple "CDC Subset" working reliably on the same SA-1100 hardware.
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* That is, the same functionality but not violating standards.
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*
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* The CDC Ethernet nonconformance points are troublesome to hosts
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* with a true CDC Ethernet implementation:
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* - Framing appends a CRC, which the spec says drivers "must not" do;
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* - Transfers data in altsetting zero, instead of altsetting 1;
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* - All these peripherals use the same ethernet address.
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*
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* The CDC MDLM nonconformance is less immediately troublesome, since all
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* MDLM implementations are quasi-proprietary anyway.
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*/
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static struct sk_buff *
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zaurus_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
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{
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int padlen;
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struct sk_buff *skb2;
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padlen = 2;
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if (!skb_cloned(skb)) {
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int tailroom = skb_tailroom(skb);
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if ((padlen + 4) <= tailroom)
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goto done;
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}
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skb2 = skb_copy_expand(skb, 0, 4 + padlen, flags);
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dev_kfree_skb_any(skb);
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skb = skb2;
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if (skb) {
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u32 fcs;
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done:
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fcs = crc32_le(~0, skb->data, skb->len);
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fcs = ~fcs;
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skb_put_u8(skb, fcs & 0xff);
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skb_put_u8(skb, (fcs >> 8) & 0xff);
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skb_put_u8(skb, (fcs >> 16) & 0xff);
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skb_put_u8(skb, (fcs >> 24) & 0xff);
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}
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return skb;
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}
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static int zaurus_bind(struct usbnet *dev, struct usb_interface *intf)
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{
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/* Belcarra's funky framing has other options; mostly
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* TRAILERS (!) with 4 bytes CRC, and maybe 2 pad bytes.
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*/
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dev->net->hard_header_len += 6;
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dev->rx_urb_size = dev->net->hard_header_len + dev->net->mtu;
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return usbnet_generic_cdc_bind(dev, intf);
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}
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/* PDA style devices are always connected if present */
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static int always_connected (struct usbnet *dev)
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{
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return 0;
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}
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static const struct driver_info zaurus_sl5x00_info = {
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.description = "Sharp Zaurus SL-5x00",
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.flags = FLAG_POINTTOPOINT | FLAG_FRAMING_Z,
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.check_connect = always_connected,
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.bind = zaurus_bind,
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.unbind = usbnet_cdc_unbind,
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.tx_fixup = zaurus_tx_fixup,
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};
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#define ZAURUS_STRONGARM_INFO ((unsigned long)&zaurus_sl5x00_info)
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static const struct driver_info zaurus_pxa_info = {
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.description = "Sharp Zaurus, PXA-2xx based",
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.flags = FLAG_POINTTOPOINT | FLAG_FRAMING_Z,
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.check_connect = always_connected,
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.bind = zaurus_bind,
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.unbind = usbnet_cdc_unbind,
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.tx_fixup = zaurus_tx_fixup,
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};
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#define ZAURUS_PXA_INFO ((unsigned long)&zaurus_pxa_info)
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static const struct driver_info olympus_mxl_info = {
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.description = "Olympus R1000",
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.flags = FLAG_POINTTOPOINT | FLAG_FRAMING_Z,
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.check_connect = always_connected,
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.bind = zaurus_bind,
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.unbind = usbnet_cdc_unbind,
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.tx_fixup = zaurus_tx_fixup,
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};
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#define OLYMPUS_MXL_INFO ((unsigned long)&olympus_mxl_info)
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/* Some more recent products using Lineo/Belcarra code will wrongly claim
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* CDC MDLM conformance. They aren't conformant: data endpoints live
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* in the control interface, there's no data interface, and it's not used
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* to talk to a cell phone radio. But at least we can detect these two
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* pseudo-classes, rather than growing this product list with entries for
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* each new nonconformant product (sigh).
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*/
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static const u8 safe_guid[16] = {
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0x5d, 0x34, 0xcf, 0x66, 0x11, 0x18, 0x11, 0xd6,
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0xa2, 0x1a, 0x00, 0x01, 0x02, 0xca, 0x9a, 0x7f,
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};
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static const u8 blan_guid[16] = {
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0x74, 0xf0, 0x3d, 0xbd, 0x1e, 0xc1, 0x44, 0x70,
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0xa3, 0x67, 0x71, 0x34, 0xc9, 0xf5, 0x54, 0x37,
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};
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static int blan_mdlm_bind(struct usbnet *dev, struct usb_interface *intf)
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{
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u8 *buf = intf->cur_altsetting->extra;
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int len = intf->cur_altsetting->extralen;
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struct usb_cdc_mdlm_desc *desc = NULL;
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struct usb_cdc_mdlm_detail_desc *detail = NULL;
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while (len > 3) {
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if (buf [1] != USB_DT_CS_INTERFACE)
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goto next_desc;
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/* use bDescriptorSubType, and just verify that we get a
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* "BLAN" (or "SAFE") descriptor.
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*/
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switch (buf [2]) {
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case USB_CDC_MDLM_TYPE:
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if (desc) {
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dev_dbg(&intf->dev, "extra MDLM\n");
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goto bad_desc;
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}
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desc = (void *) buf;
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if (desc->bLength != sizeof *desc) {
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dev_dbg(&intf->dev, "MDLM len %u\n",
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desc->bLength);
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goto bad_desc;
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}
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/* expect bcdVersion 1.0, ignore */
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if (memcmp(&desc->bGUID, blan_guid, 16) &&
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memcmp(&desc->bGUID, safe_guid, 16)) {
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/* hey, this one might _really_ be MDLM! */
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dev_dbg(&intf->dev, "MDLM guid\n");
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goto bad_desc;
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}
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break;
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case USB_CDC_MDLM_DETAIL_TYPE:
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if (detail) {
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dev_dbg(&intf->dev, "extra MDLM detail\n");
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goto bad_desc;
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}
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detail = (void *) buf;
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switch (detail->bGuidDescriptorType) {
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case 0: /* "SAFE" */
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if (detail->bLength != (sizeof *detail + 2))
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goto bad_detail;
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break;
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case 1: /* "BLAN" */
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if (detail->bLength != (sizeof *detail + 3))
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goto bad_detail;
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break;
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default:
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goto bad_detail;
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}
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/* assuming we either noticed BLAN already, or will
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* find it soon, there are some data bytes here:
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* - bmNetworkCapabilities (unused)
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* - bmDataCapabilities (bits, see below)
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* - bPad (ignored, for PADAFTER -- BLAN-only)
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* bits are:
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* - 0x01 -- Zaurus framing (add CRC)
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* - 0x02 -- PADBEFORE (CRC includes some padding)
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* - 0x04 -- PADAFTER (some padding after CRC)
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* - 0x08 -- "fermat" packet mangling (for hw bugs)
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* the PADBEFORE appears not to matter; we interop
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* with devices that use it and those that don't.
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*/
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if ((detail->bDetailData[1] & ~0x02) != 0x01) {
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/* bmDataCapabilities == 0 would be fine too,
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* but framing is minidriver-coupled for now.
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*/
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bad_detail:
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dev_dbg(&intf->dev,
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"bad MDLM detail, %d %d %d\n",
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detail->bLength,
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detail->bDetailData[0],
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detail->bDetailData[2]);
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goto bad_desc;
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}
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/* same extra framing as for non-BLAN mode */
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dev->net->hard_header_len += 6;
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dev->rx_urb_size = dev->net->hard_header_len
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+ dev->net->mtu;
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break;
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}
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next_desc:
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len -= buf [0]; /* bLength */
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buf += buf [0];
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}
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if (!desc || !detail) {
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dev_dbg(&intf->dev, "missing cdc mdlm %s%sdescriptor\n",
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desc ? "" : "func ",
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detail ? "" : "detail ");
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goto bad_desc;
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}
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/* There's probably a CDC Ethernet descriptor there, but we can't
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* rely on the Ethernet address it provides since not all vendors
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* bother to make it unique. Likewise there's no point in tracking
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* of the CDC event notifications.
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*/
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return usbnet_get_endpoints(dev, intf);
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bad_desc:
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dev_info(&dev->udev->dev, "unsupported MDLM descriptors\n");
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return -ENODEV;
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}
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static const struct driver_info bogus_mdlm_info = {
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.description = "pseudo-MDLM (BLAN) device",
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.flags = FLAG_POINTTOPOINT | FLAG_FRAMING_Z,
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.check_connect = always_connected,
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.tx_fixup = zaurus_tx_fixup,
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.bind = blan_mdlm_bind,
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};
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static const struct usb_device_id products [] = {
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#define ZAURUS_MASTER_INTERFACE \
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.bInterfaceClass = USB_CLASS_COMM, \
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.bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET, \
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.bInterfaceProtocol = USB_CDC_PROTO_NONE
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/* SA-1100 based Sharp Zaurus ("collie"), or compatible. */
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{
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.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
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| USB_DEVICE_ID_MATCH_DEVICE,
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.idVendor = 0x04DD,
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.idProduct = 0x8004,
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ZAURUS_MASTER_INTERFACE,
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.driver_info = ZAURUS_STRONGARM_INFO,
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},
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/* PXA-2xx based models are also lying-about-cdc. If you add any
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* more devices that claim to be CDC Ethernet, make sure they get
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* added to the blacklist in cdc_ether too.
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*
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* NOTE: OpenZaurus versions with 2.6 kernels won't use these entries,
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* unlike the older ones with 2.4 "embedix" kernels.
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*/
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{
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.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
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| USB_DEVICE_ID_MATCH_DEVICE,
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.idVendor = 0x04DD,
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.idProduct = 0x8005, /* A-300 */
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ZAURUS_MASTER_INTERFACE,
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.driver_info = ZAURUS_PXA_INFO,
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}, {
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.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
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| USB_DEVICE_ID_MATCH_DEVICE,
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.idVendor = 0x04DD,
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.idProduct = 0x8006, /* B-500/SL-5600 */
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ZAURUS_MASTER_INTERFACE,
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.driver_info = ZAURUS_PXA_INFO,
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}, {
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.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
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| USB_DEVICE_ID_MATCH_DEVICE,
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.idVendor = 0x04DD,
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.idProduct = 0x8007, /* C-700 */
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ZAURUS_MASTER_INTERFACE,
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.driver_info = ZAURUS_PXA_INFO,
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}, {
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.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
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| USB_DEVICE_ID_MATCH_DEVICE,
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.idVendor = 0x04DD,
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.idProduct = 0x9031, /* C-750 C-760 */
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ZAURUS_MASTER_INTERFACE,
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.driver_info = ZAURUS_PXA_INFO,
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}, {
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/* C-750/C-760/C-860/SL-C3000 PDA in MDLM mode */
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USB_DEVICE_AND_INTERFACE_INFO(0x04DD, 0x9031, USB_CLASS_COMM,
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USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
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.driver_info = (unsigned long) &bogus_mdlm_info,
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}, {
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.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
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| USB_DEVICE_ID_MATCH_DEVICE,
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.idVendor = 0x04DD,
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.idProduct = 0x9032, /* SL-6000 */
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ZAURUS_MASTER_INTERFACE,
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.driver_info = ZAURUS_PXA_INFO,
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}, {
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.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
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| USB_DEVICE_ID_MATCH_DEVICE,
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.idVendor = 0x04DD,
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/* reported with some C860 units */
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.idProduct = 0x9050, /* C-860 */
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ZAURUS_MASTER_INTERFACE,
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.driver_info = ZAURUS_PXA_INFO,
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},
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{
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/* Motorola Rokr E6 */
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USB_DEVICE_AND_INTERFACE_INFO(0x22b8, 0x6027, USB_CLASS_COMM,
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USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
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.driver_info = (unsigned long) &bogus_mdlm_info,
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}, {
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/* Motorola MOTOMAGX phones */
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USB_DEVICE_AND_INTERFACE_INFO(0x22b8, 0x6425, USB_CLASS_COMM,
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USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
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.driver_info = (unsigned long) &bogus_mdlm_info,
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},
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/* Olympus has some models with a Zaurus-compatible option.
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* R-1000 uses a FreeScale i.MXL cpu (ARMv4T)
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*/
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{
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.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
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| USB_DEVICE_ID_MATCH_DEVICE,
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.idVendor = 0x07B4,
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.idProduct = 0x0F02, /* R-1000 */
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ZAURUS_MASTER_INTERFACE,
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.driver_info = OLYMPUS_MXL_INFO,
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},
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/* Logitech Harmony 900 - uses the pseudo-MDLM (BLAN) driver */
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{
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USB_DEVICE_AND_INTERFACE_INFO(0x046d, 0xc11f, USB_CLASS_COMM,
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USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
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.driver_info = (unsigned long) &bogus_mdlm_info,
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},
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{ }, // END
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};
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MODULE_DEVICE_TABLE(usb, products);
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static struct usb_driver zaurus_driver = {
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.name = "zaurus",
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.id_table = products,
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.probe = usbnet_probe,
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.disconnect = usbnet_disconnect,
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.suspend = usbnet_suspend,
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.resume = usbnet_resume,
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.disable_hub_initiated_lpm = 1,
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};
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module_usb_driver(zaurus_driver);
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MODULE_AUTHOR("Pavel Machek, David Brownell");
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MODULE_DESCRIPTION("Sharp Zaurus PDA, and compatible products");
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MODULE_LICENSE("GPL");
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