From 3bda297edb97d28ae6ff0d19298c4e89c36c7b6e Mon Sep 17 00:00:00 2001 From: Joel Stanley Date: Sun, 8 Jun 2014 15:57:33 +0930 Subject: [PATCH] Complete forward port to 3.13 These changes update the driver to something close to the 3.13 cdc-acm driver. Not all changes have been ported. Signed-off-by: Joel Stanley --- vizzini.c | 112 ++++++++++++++++++++++++------------------------------ 1 file changed, 50 insertions(+), 62 deletions(-) diff --git a/vizzini.c b/vizzini.c index 4646098..9e085c0 100644 --- a/vizzini.c +++ b/vizzini.c @@ -157,38 +157,6 @@ static int xr21v141x_start_wb(struct xr21v141x *xr21v141x, struct xr21v141x_wb * return rc; } -static int xr21v141x_write_start(struct xr21v141x *xr21v141x, int wbn) -{ - unsigned long flags; - struct xr21v141x_wb *wb = &xr21v141x->wb[wbn]; - int rc; - - spin_lock_irqsave(&xr21v141x->write_lock, flags); - if (!xr21v141x->dev) { - wb->use = 0; - spin_unlock_irqrestore(&xr21v141x->write_lock, flags); - return -ENODEV; - } - - dev_vdbg(&xr21v141x->data->dev, "%s - susp_count %d\n", __func__, - xr21v141x->susp_count); - usb_autopm_get_interface_async(xr21v141x->control); - if (xr21v141x->susp_count) { - if (!xr21v141x->delayed_wb) - xr21v141x->delayed_wb = wb; - else - usb_autopm_put_interface_async(xr21v141x->control); - spin_unlock_irqrestore(&xr21v141x->write_lock, flags); - return 0; /* A white lie */ - } - usb_mark_last_busy(xr21v141x->dev); - - rc = xr21v141x_start_wb(xr21v141x, wb); - spin_unlock_irqrestore(&xr21v141x->write_lock, flags); - - return rc; - -} /* * attributes exported through sysfs */ @@ -233,7 +201,6 @@ static void xr21v141x_ctrl_irq(struct urb *urb) { struct xr21v141x *xr21v141x = urb->context; struct usb_cdc_notification *dr = urb->transfer_buffer; - struct tty_struct *tty; unsigned char *data; int newctrl; int retval; @@ -268,17 +235,12 @@ static void xr21v141x_ctrl_irq(struct urb *urb) break; case USB_CDC_NOTIFY_SERIAL_STATE: - tty = tty_port_tty_get(&xr21v141x->port); newctrl = get_unaligned_le16(data); - if (tty) { - if (!xr21v141x->clocal && - (xr21v141x->ctrlin & ~newctrl & ACM_CTRL_DCD)) { - dev_dbg(&xr21v141x->control->dev, + if (!xr21v141x->clocal && (xr21v141x->ctrlin & ~newctrl & ACM_CTRL_DCD)) { + dev_dbg(&xr21v141x->control->dev, "%s - calling hangup\n", __func__); - tty_hangup(tty); - } - tty_kref_put(tty); + tty_port_tty_hangup(&xr21v141x->port, false); } xr21v141x->ctrlin = newctrl; @@ -415,15 +377,10 @@ static void xr21v141x_write_bulk(struct urb *urb) static void xr21v141x_softint(struct work_struct *work) { struct xr21v141x *xr21v141x = container_of(work, struct xr21v141x, work); - struct tty_struct *tty; dev_vdbg(&xr21v141x->data->dev, "%s\n", __func__); - tty = tty_port_tty_get(&xr21v141x->port); - if (!tty) - return; - tty_wakeup(tty); - tty_kref_put(tty); + tty_port_tty_wakeup(&xr21v141x->port); } /* @@ -532,13 +489,16 @@ static int xr21v141x_port_activate(struct tty_port *port, struct tty_struct *tty if (usb_submit_urb(xr21v141x->ctrlurb, GFP_KERNEL)) { dev_err(&xr21v141x->control->dev, "%s - usb_submit_urb(ctrl irq) failed\n", __func__); + usb_autopm_put_interface(xr21v141x->control); goto error_submit_urb; } xr21v141x->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS; if (xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout) < 0 && - (xr21v141x->ctrl_caps & USB_CDC_CAP_LINE)) + (xr21v141x->ctrl_caps & USB_CDC_CAP_LINE)) { + usb_autopm_put_interface(xr21v141x->control); goto error_set_control; + } usb_autopm_put_interface(xr21v141x->control); @@ -563,7 +523,6 @@ error_submit_read_urbs: error_set_control: usb_kill_urb(xr21v141x->ctrlurb); error_submit_urb: - usb_autopm_put_interface(xr21v141x->control); error_get_interface: disconnected: mutex_unlock(&xr21v141x->mutex); @@ -576,7 +535,6 @@ static void xr21v141x_port_destruct(struct tty_port *port) dev_dbg(&xr21v141x->control->dev, "%s\n", __func__); - tty_unregister_device(xr21v141x_tty_driver, xr21v141x->minor); xr21v141x_release_minor(xr21v141x); usb_put_intf(xr21v141x->control); kfree(xr21v141x->country_codes); @@ -648,13 +606,31 @@ static int xr21v141x_tty_write(struct tty_struct *tty, } wb = &xr21v141x->wb[wbn]; + if (!xr21v141x->dev) { + wb->use = 0; + spin_unlock_irqrestore(&xr21v141x->write_lock, flags); + return -ENODEV; + } + count = (count > xr21v141x->writesize) ? xr21v141x->writesize : count; dev_vdbg(&xr21v141x->data->dev, "%s - write %d\n", __func__, count); memcpy(wb->buf, buf, count); wb->len = count; + + usb_autopm_get_interface_async(xr21v141x->control); + if (xr21v141x->susp_count) { + if (!xr21v141x->delayed_wb) + xr21v141x->delayed_wb = wb; + else + usb_autopm_put_interface_async(xr21v141x->control); + spin_unlock_irqrestore(&xr21v141x->write_lock, flags); + return count; /* A white lie */ + } + usb_mark_last_busy(xr21v141x->dev); + + stat = xr21v141x_start_wb(xr21v141x, wb); spin_unlock_irqrestore(&xr21v141x->write_lock, flags); - stat = xr21v141x_write_start(xr21v141x, wbn); if (stat < 0) return stat; return count; @@ -1270,6 +1246,8 @@ static int xr21v141x_probe(struct usb_interface *intf, int num_rx_buf; int i; int combined_interfaces = 0; + struct device *tty_dev; + int rv = -ENOMEM; /* normal quirks */ quirks = (unsigned long)id->driver_info; @@ -1609,7 +1587,7 @@ skip_countries: usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), xr21v141x->ctrl_buffer, ctrlsize, xr21v141x_ctrl_irq, xr21v141x, /* works around buggy devices */ - epctrl->bInterval ? epctrl->bInterval : 0xff); + epctrl->bInterval ? epctrl->bInterval : 16); xr21v141x->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; xr21v141x->ctrlurb->transfer_dma = xr21v141x->ctrl_dma; @@ -1625,10 +1603,24 @@ skip_countries: usb_set_intfdata(data_interface, xr21v141x); usb_get_intf(control_interface); - tty_register_device(xr21v141x_tty_driver, minor, &control_interface->dev); + tty_dev = tty_port_register_device(&xr21v141x->port, xr21v141x_tty_driver, + minor, &control_interface->dev); + if (IS_ERR(tty_dev)) { + rv = PTR_ERR(tty_dev); + goto alloc_fail8; + } return 0; +alloc_fail8: + if (xr21v141x->country_codes) { + device_remove_file(&xr21v141x->control->dev, + &dev_attr_wCountryCodes); + device_remove_file(&xr21v141x->control->dev, + &dev_attr_iCountryCodeRelDate); + } + device_remove_file(&xr21v141x->control->dev, &dev_attr_bmCapabilities); alloc_fail7: + usb_set_intfdata(intf, NULL); for (i = 0; i < ACM_NW; i++) usb_free_urb(xr21v141x->wb[i].urb); alloc_fail6: @@ -1644,7 +1636,7 @@ alloc_fail2: xr21v141x_release_minor(xr21v141x); kfree(xr21v141x); alloc_fail: - return -ENOMEM; + return rv; } static void stop_data_traffic(struct xr21v141x *xr21v141x) @@ -1696,6 +1688,8 @@ static void xr21v141x_disconnect(struct usb_interface *intf) stop_data_traffic(xr21v141x); + tty_unregister_device(xr21v141x_tty_driver, xr21v141x->minor); + usb_free_urb(xr21v141x->ctrlurb); for (i = 0; i < ACM_NW; i++) usb_free_urb(xr21v141x->wb[i].urb); @@ -1788,15 +1782,9 @@ err_out: static int xr21v141x_reset_resume(struct usb_interface *intf) { struct xr21v141x *xr21v141x = usb_get_intfdata(intf); - struct tty_struct *tty; - if (test_bit(ASYNCB_INITIALIZED, &xr21v141x->port.flags)) { - tty = tty_port_tty_get(&xr21v141x->port); - if (tty) { - tty_hangup(tty); - tty_kref_put(tty); - } - } + if (test_bit(ASYNCB_INITIALIZED, &xr21v141x->port.flags)) + tty_port_tty_hangup(&xr21v141x->port, false); return xr21v141x_resume(intf); } -- 2.39.5