Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030304AbWAMIsg (ORCPT ); Fri, 13 Jan 2006 03:48:36 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030319AbWAMIsg (ORCPT ); Fri, 13 Jan 2006 03:48:36 -0500 Received: from smtp1-g19.free.fr ([212.27.42.27]:17892 "EHLO smtp1-g19.free.fr") by vger.kernel.org with ESMTP id S1030304AbWAMIsf (ORCPT ); Fri, 13 Jan 2006 03:48:35 -0500 From: Duncan Sands To: Greg KH Subject: [PATCH 05/13] USBATM: xusbatm rewrite Date: Fri, 13 Jan 2006 09:48:36 +0100 User-Agent: KMail/1.9.1 Cc: usbatm@lists.infradead.org, linux-usb-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org References: <200601121729.52596.baldrick@free.fr> In-Reply-To: <200601121729.52596.baldrick@free.fr> MIME-Version: 1.0 Content-Type: Multipart/Mixed; boundary="Boundary-00=_kl2xDM8HpBRqMKZ" Message-Id: <200601130948.36673.baldrick@free.fr> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7640 Lines: 201 --Boundary-00=_kl2xDM8HpBRqMKZ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline The xusbatm driver is for otherwise unsupported modems. All it does is grab hold of a user-specified set of interfaces - the generic usbatm core methods (hopefully) do the rest. As Aurelio Arroyo discovered when he tried to use xusbatm (big mistake!), the interface grabbing logic was completely borked. Here is a rewrite that works. Signed-off-by: Duncan Sands --Boundary-00=_kl2xDM8HpBRqMKZ Content-Type: text/x-csrc; charset="iso-8859-1"; name="05-xusbatm" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="05-xusbatm" Index: Linux/drivers/usb/atm/xusbatm.c =================================================================== --- Linux.orig/drivers/usb/atm/xusbatm.c 2006-01-13 08:48:09.000000000 +0100 +++ Linux/drivers/usb/atm/xusbatm.c 2006-01-13 08:57:07.000000000 +0100 @@ -41,6 +41,8 @@ XUSBATM_PARM(tx_endpoint, unsigned char, byte, "tx endpoint number"); XUSBATM_PARM(rx_padding, unsigned char, byte, "rx padding (default 0)"); XUSBATM_PARM(tx_padding, unsigned char, byte, "tx padding (default 0)"); +XUSBATM_PARM(rx_altsetting, unsigned char, byte, "rx altsetting (default 0)"); +XUSBATM_PARM(tx_altsetting, unsigned char, byte, "rx altsetting (default 0)"); static const char xusbatm_driver_name[] = "xusbatm"; @@ -48,61 +50,94 @@ static struct usb_device_id xusbatm_usb_ids[XUSBATM_DRIVERS_MAX + 1]; static struct usb_driver xusbatm_usb_driver; -static int usb_intf_has_ep(const struct usb_interface *intf, u8 ep) +static struct usb_interface *xusbatm_find_intf (struct usb_device *usb_dev, int altsetting, u8 ep) { + struct usb_host_interface *alt; + struct usb_interface *intf; int i, j; - for (i = 0; i < intf->num_altsetting; i++) { - struct usb_host_interface *alt = intf->altsetting; - for (j = 0; j < alt->desc.bNumEndpoints; j++) - if ((alt->endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) == ep) - return 1; + for(i = 0; i < usb_dev->actconfig->desc.bNumInterfaces; i++) + if ((intf = usb_dev->actconfig->interface[i]) && (alt = usb_altnum_to_altsetting(intf, altsetting))) + for (j = 0; j < alt->desc.bNumEndpoints; j++) + if (alt->endpoint[j].desc.bEndpointAddress == ep) + return intf; + return NULL; +} + +static int xusbatm_capture_intf (struct usbatm_data *usbatm, struct usb_device *usb_dev, + struct usb_interface *intf, int altsetting, int claim) +{ + int ifnum = intf->altsetting->desc.bInterfaceNumber; + int ret; + + if (claim && (ret = usb_driver_claim_interface(&xusbatm_usb_driver, intf, usbatm))) { + usb_err(usbatm, "%s: failed to claim interface %2d (%d)!\n", __func__, ifnum, ret); + return ret; + } + if ((ret = usb_set_interface(usb_dev, ifnum, altsetting))) { + usb_err(usbatm, "%s: altsetting %2d for interface %2d failed (%d)!\n", __func__, altsetting, ifnum, ret); + return ret; } return 0; } +static void xusbatm_release_intf (struct usb_device *usb_dev, struct usb_interface *intf, int claimed) +{ + if (claimed) { + usb_set_intfdata(intf, NULL); + usb_driver_release_interface(&xusbatm_usb_driver, intf); + } +} + static int xusbatm_bind(struct usbatm_data *usbatm, struct usb_interface *intf, const struct usb_device_id *id) { struct usb_device *usb_dev = interface_to_usbdev(intf); int drv_ix = id - xusbatm_usb_ids; - int rx_ep_present = usb_intf_has_ep(intf, rx_endpoint[drv_ix]); - int tx_ep_present = usb_intf_has_ep(intf, tx_endpoint[drv_ix]); - u8 searched_ep = rx_ep_present ? tx_endpoint[drv_ix] : rx_endpoint[drv_ix]; - int i, ret; + int rx_alt = rx_altsetting[drv_ix]; + int tx_alt = tx_altsetting[drv_ix]; + struct usb_interface *rx_intf = xusbatm_find_intf(usb_dev, rx_alt, rx_endpoint[drv_ix]); + struct usb_interface *tx_intf = xusbatm_find_intf(usb_dev, tx_alt, tx_endpoint[drv_ix]); + int ret; usb_dbg(usbatm, "%s: binding driver %d: vendor %04x product %04x" - " rx: ep %02x padd %d tx: ep %02x padd %d\n", + " rx: ep %02x padd %d alt %2d tx: ep %02x padd %d alt %2d\n", __func__, drv_ix, vendor[drv_ix], product[drv_ix], - rx_endpoint[drv_ix], rx_padding[drv_ix], - tx_endpoint[drv_ix], tx_padding[drv_ix]); + rx_endpoint[drv_ix], rx_padding[drv_ix], rx_alt, + tx_endpoint[drv_ix], tx_padding[drv_ix], tx_alt); - if (!rx_ep_present && !tx_ep_present) { - usb_dbg(usbatm, "%s: intf #%d has neither rx (%#x) nor tx (%#x) endpoint\n", - __func__, intf->altsetting->desc.bInterfaceNumber, - rx_endpoint[drv_ix], tx_endpoint[drv_ix]); + if (!rx_intf || !tx_intf) { + if (!rx_intf) + usb_dbg(usbatm, "%s: no interface contains endpoint %02x in altsetting %2d\n", + __func__, rx_endpoint[drv_ix], rx_alt); + if (!tx_intf) + usb_dbg(usbatm, "%s: no interface contains endpoint %02x in altsetting %2d\n", + __func__, tx_endpoint[drv_ix], tx_alt); return -ENODEV; } - if (rx_ep_present && tx_ep_present) - return 0; + if ((rx_intf != intf) && (tx_intf != intf)) + return -ENODEV; - for(i = 0; i < usb_dev->actconfig->desc.bNumInterfaces; i++) { - struct usb_interface *cur_if = usb_dev->actconfig->interface[i]; + if ((rx_intf == tx_intf) && (rx_alt != tx_alt)) { + usb_err(usbatm, "%s: altsettings clash on interface %2d (%2d vs %2d)!\n", __func__, + rx_intf->altsetting->desc.bInterfaceNumber, rx_alt, tx_alt); + return -EINVAL; + } - if (cur_if != intf && usb_intf_has_ep(cur_if, searched_ep)) { - ret = usb_driver_claim_interface(&xusbatm_usb_driver, - cur_if, usbatm); - if (!ret) - usb_err(usbatm, "%s: failed to claim interface #%d (%d)\n", - __func__, cur_if->altsetting->desc.bInterfaceNumber, ret); - return ret; - } + usb_dbg(usbatm, "%s: rx If#=%2d; tx If#=%2d\n", __func__, + rx_intf->altsetting->desc.bInterfaceNumber, + tx_intf->altsetting->desc.bInterfaceNumber); + + if ((ret = xusbatm_capture_intf(usbatm, usb_dev, rx_intf, rx_alt, rx_intf != intf))) + return ret; + + if ((tx_intf != rx_intf) && (ret = xusbatm_capture_intf(usbatm, usb_dev, tx_intf, tx_alt, tx_intf != intf))) { + xusbatm_release_intf(usb_dev, rx_intf, rx_intf != intf); + return ret; } - usb_err(usbatm, "%s: no interface has endpoint %#x\n", - __func__, searched_ep); - return -ENODEV; + return 0; } static void xusbatm_unbind(struct usbatm_data *usbatm, @@ -114,9 +149,12 @@ usb_dbg(usbatm, "%s entered\n", __func__); for(i = 0; i < usb_dev->actconfig->desc.bNumInterfaces; i++) { - struct usb_interface *cur_if = usb_dev->actconfig->interface[i]; - usb_set_intfdata(cur_if, NULL); - usb_driver_release_interface(&xusbatm_usb_driver, cur_if); + struct usb_interface *cur_intf = usb_dev->actconfig->interface[i]; + + if (cur_intf && (usb_get_intfdata(cur_intf) == usbatm)) { + usb_set_intfdata(cur_intf, NULL); + usb_driver_release_interface(&xusbatm_usb_driver, cur_intf); + } } } @@ -161,11 +199,13 @@ } for (i = 0; i < num_vendor; i++) { + rx_endpoint[i] |= USB_DIR_IN; + tx_endpoint[i] &= USB_ENDPOINT_NUMBER_MASK; + xusbatm_usb_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE; xusbatm_usb_ids[i].idVendor = vendor[i]; xusbatm_usb_ids[i].idProduct = product[i]; - xusbatm_drivers[i].driver_name = xusbatm_driver_name; xusbatm_drivers[i].bind = xusbatm_bind; xusbatm_drivers[i].unbind = xusbatm_unbind; --Boundary-00=_kl2xDM8HpBRqMKZ-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/