387 lines
11 KiB
C
387 lines
11 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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/config.h>
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#ifdef CONFIG_USB_DEBUG
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# define DEBUG
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#endif
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/init.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 "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, unsigned 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 (skb, 1) = fcs & 0xff;
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*skb_put (skb, 1) = (fcs>> 8) & 0xff;
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*skb_put (skb, 1) = (fcs>>16) & 0xff;
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*skb_put (skb, 1) = (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_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_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_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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/* bmDataCapabilites == 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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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_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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.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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/* At least some of the newest PXA units have very different lies about
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* their standards support: they claim to be cell phones offering
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* direct access to their radios! (No, they don't conform to CDC MDLM.)
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*/
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{
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USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MDLM,
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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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{ }, // 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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.owner = THIS_MODULE,
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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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};
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static int __init zaurus_init(void)
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{
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return usb_register(&zaurus_driver);
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}
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module_init(zaurus_init);
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static void __exit zaurus_exit(void)
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{
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usb_deregister(&zaurus_driver);
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}
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module_exit(zaurus_exit);
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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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