diff options
Diffstat (limited to 'drivers/usb/serial/sierra.c')
| -rw-r--r-- | drivers/usb/serial/sierra.c | 1063 |
1 files changed, 1063 insertions, 0 deletions
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c new file mode 100644 index 000000000..018a27d87 --- /dev/null +++ b/drivers/usb/serial/sierra.c @@ -0,0 +1,1063 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + USB Driver for Sierra Wireless + + Copyright (C) 2006, 2007, 2008 Kevin Lloyd <klloyd@sierrawireless.com>, + + Copyright (C) 2008, 2009 Elina Pasheva, Matthew Safar, Rory Filer + <linux@sierrawireless.com> + + IMPORTANT DISCLAIMER: This driver is not commercially supported by + Sierra Wireless. Use at your own risk. + + Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de> + Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org> +*/ +/* Uncomment to log function calls */ +/* #define DEBUG */ + +#define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer" +#define DRIVER_DESC "USB Driver for Sierra Wireless USB modems" + +#include <linux/kernel.h> +#include <linux/jiffies.h> +#include <linux/errno.h> +#include <linux/tty.h> +#include <linux/slab.h> +#include <linux/tty_flip.h> +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/usb/serial.h> + +#define SWIMS_USB_REQUEST_SetPower 0x00 +#define SWIMS_USB_REQUEST_SetNmea 0x07 + +#define N_IN_URB_HM 8 +#define N_OUT_URB_HM 64 +#define N_IN_URB 4 +#define N_OUT_URB 4 +#define IN_BUFLEN 4096 + +#define MAX_TRANSFER (PAGE_SIZE - 512) +/* MAX_TRANSFER is chosen so that the VM is not stressed by + allocations > PAGE_SIZE and the number of packets in a page + is an integer 512 is the largest possible packet on EHCI */ + +static bool nmea; + +struct sierra_iface_list { + const u8 *nums; /* array of interface numbers */ + size_t count; /* number of elements in array */ +}; + +struct sierra_intf_private { + spinlock_t susp_lock; + unsigned int suspended:1; + int in_flight; + unsigned int open_ports; +}; + +static int sierra_set_power_state(struct usb_device *udev, __u16 swiState) +{ + return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), + SWIMS_USB_REQUEST_SetPower, /* __u8 request */ + USB_TYPE_VENDOR, /* __u8 request type */ + swiState, /* __u16 value */ + 0, /* __u16 index */ + NULL, /* void *data */ + 0, /* __u16 size */ + USB_CTRL_SET_TIMEOUT); /* int timeout */ +} + +static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable) +{ + return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), + SWIMS_USB_REQUEST_SetNmea, /* __u8 request */ + USB_TYPE_VENDOR, /* __u8 request type */ + enable, /* __u16 value */ + 0x0000, /* __u16 index */ + NULL, /* void *data */ + 0, /* __u16 size */ + USB_CTRL_SET_TIMEOUT); /* int timeout */ +} + +static int sierra_calc_num_ports(struct usb_serial *serial, + struct usb_serial_endpoints *epds) +{ + int num_ports = 0; + u8 ifnum, numendpoints; + + ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber; + numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints; + + /* Dummy interface present on some SKUs should be ignored */ + if (ifnum == 0x99) + num_ports = 0; + else if (numendpoints <= 3) + num_ports = 1; + else + num_ports = (numendpoints-1)/2; + return num_ports; +} + +static bool is_listed(const u8 ifnum, const struct sierra_iface_list *list) +{ + int i; + + if (!list) + return false; + + for (i = 0; i < list->count; i++) { + if (list->nums[i] == ifnum) + return true; + } + + return false; +} + +static u8 sierra_interface_num(struct usb_serial *serial) +{ + return serial->interface->cur_altsetting->desc.bInterfaceNumber; +} + +static int sierra_probe(struct usb_serial *serial, + const struct usb_device_id *id) +{ + const struct sierra_iface_list *ignore_list; + int result = 0; + struct usb_device *udev; + u8 ifnum; + + udev = serial->dev; + ifnum = sierra_interface_num(serial); + + /* + * If this interface supports more than 1 alternate + * select the 2nd one + */ + if (serial->interface->num_altsetting == 2) { + dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n", + ifnum); + /* We know the alternate setting is 1 for the MC8785 */ + usb_set_interface(udev, ifnum, 1); + } + + ignore_list = (const struct sierra_iface_list *)id->driver_info; + + if (is_listed(ifnum, ignore_list)) { + dev_dbg(&serial->dev->dev, "Ignoring interface #%d\n", ifnum); + return -ENODEV; + } + + return result; +} + +/* interfaces with higher memory requirements */ +static const u8 hi_memory_typeA_ifaces[] = { 0, 2 }; +static const struct sierra_iface_list typeA_interface_list = { + .nums = hi_memory_typeA_ifaces, + .count = ARRAY_SIZE(hi_memory_typeA_ifaces), +}; + +static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 }; +static const struct sierra_iface_list typeB_interface_list = { + .nums = hi_memory_typeB_ifaces, + .count = ARRAY_SIZE(hi_memory_typeB_ifaces), +}; + +/* 'ignorelist' of interfaces not served by this driver */ +static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11, 19, 20 }; +static const struct sierra_iface_list direct_ip_interface_ignore = { + .nums = direct_ip_non_serial_ifaces, + .count = ARRAY_SIZE(direct_ip_non_serial_ifaces), +}; + +static const struct usb_device_id id_table[] = { + { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */ + { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */ + { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */ + { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */ + + { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */ + { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */ + { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */ + { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */ + { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */ + { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */ + { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */ + { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */ + { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */ + { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */ + { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */ + { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */ + { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */ + /* Sierra Wireless C597 */ + { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) }, + /* Sierra Wireless T598 */ + { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) }, + { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */ + { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */ + { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */ + { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */ + + { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */ + { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */ + { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */ + { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */ + { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */ + { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */ + { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */ + { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */ + { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */ + { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */ + { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */ + { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */ + { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */ + { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */ + { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */ + { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */ + { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */ + { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */ + { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */ + { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */ + { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */ + /* Sierra Wireless MC8790, MC8791, MC8792 Composite */ + { USB_DEVICE(0x1199, 0x683C) }, + { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */ + /* Sierra Wireless MC8790, MC8791, MC8792 */ + { USB_DEVICE(0x1199, 0x683E) }, + { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */ + { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */ + { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */ + { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */ + { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */ + { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */ + { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */ + { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */ + /* Sierra Wireless C885 */ + { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)}, + /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */ + { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)}, + /* Sierra Wireless C22/C33 */ + { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)}, + /* Sierra Wireless HSPA Non-Composite Device */ + { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)}, + { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */ + /* Sierra Wireless Direct IP modems */ + { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68A3, 0xFF, 0xFF, 0xFF), + .driver_info = (kernel_ulong_t)&direct_ip_interface_ignore + }, + { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68AA, 0xFF, 0xFF, 0xFF), + .driver_info = (kernel_ulong_t)&direct_ip_interface_ignore + }, + { USB_DEVICE(0x1199, 0x68AB) }, /* Sierra Wireless AR8550 */ + /* AT&T Direct IP LTE modems */ + { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68AA, 0xFF, 0xFF, 0xFF), + .driver_info = (kernel_ulong_t)&direct_ip_interface_ignore + }, + /* Airprime/Sierra Wireless Direct IP modems */ + { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68A3, 0xFF, 0xFF, 0xFF), + .driver_info = (kernel_ulong_t)&direct_ip_interface_ignore + }, + + { } +}; +MODULE_DEVICE_TABLE(usb, id_table); + + +struct sierra_port_private { + spinlock_t lock; /* lock the structure */ + int outstanding_urbs; /* number of out urbs in flight */ + struct usb_anchor active; + struct usb_anchor delayed; + + int num_out_urbs; + int num_in_urbs; + /* Input endpoints and buffers for this port */ + struct urb *in_urbs[N_IN_URB_HM]; + + /* Settings for the port */ + int rts_state; /* Handshaking pins (outputs) */ + int dtr_state; + int cts_state; /* Handshaking pins (inputs) */ + int dsr_state; + int dcd_state; + int ri_state; +}; + +static int sierra_send_setup(struct usb_serial_port *port) +{ + struct usb_serial *serial = port->serial; + struct sierra_port_private *portdata; + __u16 interface = 0; + int val = 0; + int do_send = 0; + int retval; + + portdata = usb_get_serial_port_data(port); + + if (portdata->dtr_state) + val |= 0x01; + if (portdata->rts_state) + val |= 0x02; + + /* If composite device then properly report interface */ + if (serial->num_ports == 1) { + interface = sierra_interface_num(serial); + /* Control message is sent only to interfaces with + * interrupt_in endpoints + */ + if (port->interrupt_in_urb) { + /* send control message */ + do_send = 1; + } + } + + /* Otherwise the need to do non-composite mapping */ + else { + if (port->bulk_out_endpointAddress == 2) + interface = 0; + else if (port->bulk_out_endpointAddress == 4) + interface = 1; + else if (port->bulk_out_endpointAddress == 5) + interface = 2; + + do_send = 1; + } + if (!do_send) + return 0; + + retval = usb_autopm_get_interface(serial->interface); + if (retval < 0) + return retval; + + retval = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT); + usb_autopm_put_interface(serial->interface); + + return retval; +} + +static int sierra_tiocmget(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + unsigned int value; + struct sierra_port_private *portdata; + + portdata = usb_get_serial_port_data(port); + + value = ((portdata->rts_state) ? TIOCM_RTS : 0) | + ((portdata->dtr_state) ? TIOCM_DTR : 0) | + ((portdata->cts_state) ? TIOCM_CTS : 0) | + ((portdata->dsr_state) ? TIOCM_DSR : 0) | + ((portdata->dcd_state) ? TIOCM_CAR : 0) | + ((portdata->ri_state) ? TIOCM_RNG : 0); + + return value; +} + +static int sierra_tiocmset(struct tty_struct *tty, + unsigned int set, unsigned int clear) +{ + struct usb_serial_port *port = tty->driver_data; + struct sierra_port_private *portdata; + + portdata = usb_get_serial_port_data(port); + + if (set & TIOCM_RTS) + portdata->rts_state = 1; + if (set & TIOCM_DTR) + portdata->dtr_state = 1; + + if (clear & TIOCM_RTS) + portdata->rts_state = 0; + if (clear & TIOCM_DTR) + portdata->dtr_state = 0; + return sierra_send_setup(port); +} + +static void sierra_release_urb(struct urb *urb) +{ + if (urb) { + kfree(urb->transfer_buffer); + usb_free_urb(urb); + } +} + +static void sierra_outdat_callback(struct urb *urb) +{ + struct usb_serial_port *port = urb->context; + struct sierra_port_private *portdata = usb_get_serial_port_data(port); + struct sierra_intf_private *intfdata; + int status = urb->status; + unsigned long flags; + + intfdata = usb_get_serial_data(port->serial); + + /* free up the transfer buffer, as usb_free_urb() does not do this */ + kfree(urb->transfer_buffer); + usb_autopm_put_interface_async(port->serial->interface); + if (status) + dev_dbg(&port->dev, "%s - nonzero write bulk status " + "received: %d\n", __func__, status); + + spin_lock_irqsave(&portdata->lock, flags); + --portdata->outstanding_urbs; + spin_unlock_irqrestore(&portdata->lock, flags); + spin_lock_irqsave(&intfdata->susp_lock, flags); + --intfdata->in_flight; + spin_unlock_irqrestore(&intfdata->susp_lock, flags); + + usb_serial_port_softint(port); +} + +/* Write */ +static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port, + const unsigned char *buf, int count) +{ + struct sierra_port_private *portdata; + struct sierra_intf_private *intfdata; + struct usb_serial *serial = port->serial; + unsigned long flags; + unsigned char *buffer; + struct urb *urb; + size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER); + int retval = 0; + + /* verify that we actually have some data to write */ + if (count == 0) + return 0; + + portdata = usb_get_serial_port_data(port); + intfdata = usb_get_serial_data(serial); + + dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize); + spin_lock_irqsave(&portdata->lock, flags); + dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__, + portdata->outstanding_urbs); + if (portdata->outstanding_urbs > portdata->num_out_urbs) { + spin_unlock_irqrestore(&portdata->lock, flags); + dev_dbg(&port->dev, "%s - write limit hit\n", __func__); + return 0; + } + portdata->outstanding_urbs++; + dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__, + portdata->outstanding_urbs); + spin_unlock_irqrestore(&portdata->lock, flags); + + retval = usb_autopm_get_interface_async(serial->interface); + if (retval < 0) { + spin_lock_irqsave(&portdata->lock, flags); + portdata->outstanding_urbs--; + spin_unlock_irqrestore(&portdata->lock, flags); + goto error_simple; + } + + buffer = kmalloc(writesize, GFP_ATOMIC); + if (!buffer) { + retval = -ENOMEM; + goto error_no_buffer; + } + + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (!urb) { + retval = -ENOMEM; + goto error_no_urb; + } + + memcpy(buffer, buf, writesize); + + usb_serial_debug_data(&port->dev, __func__, writesize, buffer); + + usb_fill_bulk_urb(urb, serial->dev, + usb_sndbulkpipe(serial->dev, + port->bulk_out_endpointAddress), + buffer, writesize, sierra_outdat_callback, port); + + /* Handle the need to send a zero length packet */ + urb->transfer_flags |= URB_ZERO_PACKET; + + spin_lock_irqsave(&intfdata->susp_lock, flags); + + if (intfdata->suspended) { + usb_anchor_urb(urb, &portdata->delayed); + spin_unlock_irqrestore(&intfdata->susp_lock, flags); + goto skip_power; + } else { + usb_anchor_urb(urb, &portdata->active); + } + /* send it down the pipe */ + retval = usb_submit_urb(urb, GFP_ATOMIC); + if (retval) { + usb_unanchor_urb(urb); + spin_unlock_irqrestore(&intfdata->susp_lock, flags); + dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " + "with status = %d\n", __func__, retval); + goto error; + } else { + intfdata->in_flight++; + spin_unlock_irqrestore(&intfdata->susp_lock, flags); + } + +skip_power: + /* we are done with this urb, so let the host driver + * really free it when it is finished with it */ + usb_free_urb(urb); + + return writesize; +error: + usb_free_urb(urb); +error_no_urb: + kfree(buffer); +error_no_buffer: + spin_lock_irqsave(&portdata->lock, flags); + --portdata->outstanding_urbs; + dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__, + portdata->outstanding_urbs); + spin_unlock_irqrestore(&portdata->lock, flags); + usb_autopm_put_interface_async(serial->interface); +error_simple: + return retval; +} + +static void sierra_indat_callback(struct urb *urb) +{ + int err; + int endpoint; + struct usb_serial_port *port; + unsigned char *data = urb->transfer_buffer; + int status = urb->status; + + endpoint = usb_pipeendpoint(urb->pipe); + port = urb->context; + + if (status) { + dev_dbg(&port->dev, "%s: nonzero status: %d on" + " endpoint %02x\n", __func__, status, endpoint); + } else { + if (urb->actual_length) { + tty_insert_flip_string(&port->port, data, + urb->actual_length); + tty_flip_buffer_push(&port->port); + + usb_serial_debug_data(&port->dev, __func__, + urb->actual_length, data); + } else { + dev_dbg(&port->dev, "%s: empty read urb" + " received\n", __func__); + } + } + + /* Resubmit urb so we continue receiving */ + if (status != -ESHUTDOWN && status != -EPERM) { + usb_mark_last_busy(port->serial->dev); + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err && err != -EPERM) + dev_err(&port->dev, "resubmit read urb failed." + "(%d)\n", err); + } +} + +static void sierra_instat_callback(struct urb *urb) +{ + int err; + int status = urb->status; + struct usb_serial_port *port = urb->context; + struct sierra_port_private *portdata = usb_get_serial_port_data(port); + struct usb_serial *serial = port->serial; + + dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__, + urb, port, portdata); + + if (status == 0) { + struct usb_ctrlrequest *req_pkt = urb->transfer_buffer; + + if (!req_pkt) { + dev_dbg(&port->dev, "%s: NULL req_pkt\n", + __func__); + return; + } + if ((req_pkt->bRequestType == 0xA1) && + (req_pkt->bRequest == 0x20)) { + int old_dcd_state; + unsigned char signals = *((unsigned char *) + urb->transfer_buffer + + sizeof(struct usb_ctrlrequest)); + + dev_dbg(&port->dev, "%s: signal x%x\n", __func__, + signals); + + old_dcd_state = portdata->dcd_state; + portdata->cts_state = 1; + portdata->dcd_state = ((signals & 0x01) ? 1 : 0); + portdata->dsr_state = ((signals & 0x02) ? 1 : 0); + portdata->ri_state = ((signals & 0x08) ? 1 : 0); + + if (old_dcd_state && !portdata->dcd_state) + tty_port_tty_hangup(&port->port, true); + } else { + dev_dbg(&port->dev, "%s: type %x req %x\n", + __func__, req_pkt->bRequestType, + req_pkt->bRequest); + } + } else + dev_dbg(&port->dev, "%s: error %d\n", __func__, status); + + /* Resubmit urb so we continue receiving IRQ data */ + if (status != -ESHUTDOWN && status != -ENOENT) { + usb_mark_last_busy(serial->dev); + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err && err != -EPERM) + dev_err(&port->dev, "%s: resubmit intr urb " + "failed. (%d)\n", __func__, err); + } +} + +static int sierra_write_room(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct sierra_port_private *portdata = usb_get_serial_port_data(port); + unsigned long flags; + + /* try to give a good number back based on if we have any free urbs at + * this point in time */ + spin_lock_irqsave(&portdata->lock, flags); + if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) { + spin_unlock_irqrestore(&portdata->lock, flags); + dev_dbg(&port->dev, "%s - write limit hit\n", __func__); + return 0; + } + spin_unlock_irqrestore(&portdata->lock, flags); + + return 2048; +} + +static int sierra_chars_in_buffer(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct sierra_port_private *portdata = usb_get_serial_port_data(port); + unsigned long flags; + int chars; + + /* NOTE: This overcounts somewhat. */ + spin_lock_irqsave(&portdata->lock, flags); + chars = portdata->outstanding_urbs * MAX_TRANSFER; + spin_unlock_irqrestore(&portdata->lock, flags); + + dev_dbg(&port->dev, "%s - %d\n", __func__, chars); + + return chars; +} + +static void sierra_stop_rx_urbs(struct usb_serial_port *port) +{ + int i; + struct sierra_port_private *portdata = usb_get_serial_port_data(port); + + for (i = 0; i < portdata->num_in_urbs; i++) + usb_kill_urb(portdata->in_urbs[i]); + + usb_kill_urb(port->interrupt_in_urb); +} + +static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags) +{ + int ok_cnt; + int err = -EINVAL; + int i; + struct urb *urb; + struct sierra_port_private *portdata = usb_get_serial_port_data(port); + + ok_cnt = 0; + for (i = 0; i < portdata->num_in_urbs; i++) { + urb = portdata->in_urbs[i]; + if (!urb) + continue; + err = usb_submit_urb(urb, mem_flags); + if (err) { + dev_err(&port->dev, "%s: submit urb failed: %d\n", + __func__, err); + } else { + ok_cnt++; + } + } + + if (ok_cnt && port->interrupt_in_urb) { + err = usb_submit_urb(port->interrupt_in_urb, mem_flags); + if (err) { + dev_err(&port->dev, "%s: submit intr urb failed: %d\n", + __func__, err); + } + } + + if (ok_cnt > 0) /* at least one rx urb submitted */ + return 0; + else + return err; +} + +static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint, + int dir, void *ctx, int len, + gfp_t mem_flags, + usb_complete_t callback) +{ + struct urb *urb; + u8 *buf; + + urb = usb_alloc_urb(0, mem_flags); + if (!urb) + return NULL; + + buf = kmalloc(len, mem_flags); + if (buf) { + /* Fill URB using supplied data */ + usb_fill_bulk_urb(urb, serial->dev, + usb_sndbulkpipe(serial->dev, endpoint) | dir, + buf, len, callback, ctx); + + dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__, + dir == USB_DIR_IN ? 'i' : 'o', urb, buf); + } else { + sierra_release_urb(urb); + urb = NULL; + } + + return urb; +} + +static void sierra_close(struct usb_serial_port *port) +{ + int i; + struct usb_serial *serial = port->serial; + struct sierra_port_private *portdata; + struct sierra_intf_private *intfdata = usb_get_serial_data(serial); + struct urb *urb; + + portdata = usb_get_serial_port_data(port); + + /* + * Need to take susp_lock to make sure port is not already being + * resumed, but no need to hold it due to the tty-port initialized + * flag. + */ + spin_lock_irq(&intfdata->susp_lock); + if (--intfdata->open_ports == 0) + serial->interface->needs_remote_wakeup = 0; + spin_unlock_irq(&intfdata->susp_lock); + + for (;;) { + urb = usb_get_from_anchor(&portdata->delayed); + if (!urb) + break; + kfree(urb->transfer_buffer); + usb_free_urb(urb); + usb_autopm_put_interface_async(serial->interface); + spin_lock_irq(&portdata->lock); + portdata->outstanding_urbs--; + spin_unlock_irq(&portdata->lock); + } + + sierra_stop_rx_urbs(port); + usb_kill_anchored_urbs(&portdata->active); + + for (i = 0; i < portdata->num_in_urbs; i++) { + sierra_release_urb(portdata->in_urbs[i]); + portdata->in_urbs[i] = NULL; + } + + usb_autopm_get_interface_no_resume(serial->interface); +} + +static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port) +{ + struct sierra_port_private *portdata; + struct usb_serial *serial = port->serial; + struct sierra_intf_private *intfdata = usb_get_serial_data(serial); + int i; + int err; + int endpoint; + struct urb *urb; + + portdata = usb_get_serial_port_data(port); + + endpoint = port->bulk_in_endpointAddress; + for (i = 0; i < portdata->num_in_urbs; i++) { + urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port, + IN_BUFLEN, GFP_KERNEL, + sierra_indat_callback); + portdata->in_urbs[i] = urb; + } + /* clear halt condition */ + usb_clear_halt(serial->dev, + usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN); + + err = sierra_submit_rx_urbs(port, GFP_KERNEL); + if (err) + goto err_submit; + + spin_lock_irq(&intfdata->susp_lock); + if (++intfdata->open_ports == 1) + serial->interface->needs_remote_wakeup = 1; + spin_unlock_irq(&intfdata->susp_lock); + usb_autopm_put_interface(serial->interface); + + return 0; + +err_submit: + sierra_stop_rx_urbs(port); + + for (i = 0; i < portdata->num_in_urbs; i++) { + sierra_release_urb(portdata->in_urbs[i]); + portdata->in_urbs[i] = NULL; + } + + return err; +} + + +static void sierra_dtr_rts(struct usb_serial_port *port, int on) +{ + struct sierra_port_private *portdata; + + portdata = usb_get_serial_port_data(port); + portdata->rts_state = on; + portdata->dtr_state = on; + + sierra_send_setup(port); +} + +static int sierra_startup(struct usb_serial *serial) +{ + struct sierra_intf_private *intfdata; + + intfdata = kzalloc(sizeof(*intfdata), GFP_KERNEL); + if (!intfdata) + return -ENOMEM; + + spin_lock_init(&intfdata->susp_lock); + + usb_set_serial_data(serial, intfdata); + + /* Set Device mode to D0 */ + sierra_set_power_state(serial->dev, 0x0000); + + /* Check NMEA and set */ + if (nmea) + sierra_vsc_set_nmea(serial->dev, 1); + + return 0; +} + +static void sierra_release(struct usb_serial *serial) +{ + struct sierra_intf_private *intfdata; + + intfdata = usb_get_serial_data(serial); + kfree(intfdata); +} + +static int sierra_port_probe(struct usb_serial_port *port) +{ + struct usb_serial *serial = port->serial; + struct sierra_port_private *portdata; + const struct sierra_iface_list *himemory_list; + u8 ifnum; + + portdata = kzalloc(sizeof(*portdata), GFP_KERNEL); + if (!portdata) + return -ENOMEM; + + spin_lock_init(&portdata->lock); + init_usb_anchor(&portdata->active); + init_usb_anchor(&portdata->delayed); + + /* Assume low memory requirements */ + portdata->num_out_urbs = N_OUT_URB; + portdata->num_in_urbs = N_IN_URB; + + /* Determine actual memory requirements */ + if (serial->num_ports == 1) { + /* Get interface number for composite device */ + ifnum = sierra_interface_num(serial); + himemory_list = &typeB_interface_list; + } else { + /* This is really the usb-serial port number of the interface + * rather than the interface number. + */ + ifnum = port->port_number; + himemory_list = &typeA_interface_list; + } + + if (is_listed(ifnum, himemory_list)) { + portdata->num_out_urbs = N_OUT_URB_HM; + portdata->num_in_urbs = N_IN_URB_HM; + } + + dev_dbg(&port->dev, + "Memory usage (urbs) interface #%d, in=%d, out=%d\n", + ifnum, portdata->num_in_urbs, portdata->num_out_urbs); + + usb_set_serial_port_data(port, portdata); + + return 0; +} + +static int sierra_port_remove(struct usb_serial_port *port) +{ + struct sierra_port_private *portdata; + + portdata = usb_get_serial_port_data(port); + usb_set_serial_port_data(port, NULL); + kfree(portdata); + + return 0; +} + +#ifdef CONFIG_PM +static void stop_read_write_urbs(struct usb_serial *serial) +{ + int i; + struct usb_serial_port *port; + struct sierra_port_private *portdata; + + /* Stop reading/writing urbs */ + for (i = 0; i < serial->num_ports; ++i) { + port = serial->port[i]; + portdata = usb_get_serial_port_data(port); + if (!portdata) + continue; + sierra_stop_rx_urbs(port); + usb_kill_anchored_urbs(&portdata->active); + } +} + +static int sierra_suspend(struct usb_serial *serial, pm_message_t message) +{ + struct sierra_intf_private *intfdata = usb_get_serial_data(serial); + + spin_lock_irq(&intfdata->susp_lock); + if (PMSG_IS_AUTO(message)) { + if (intfdata->in_flight) { + spin_unlock_irq(&intfdata->susp_lock); + return -EBUSY; + } + } + intfdata->suspended = 1; + spin_unlock_irq(&intfdata->susp_lock); + + stop_read_write_urbs(serial); + + return 0; +} + +/* Caller must hold susp_lock. */ +static int sierra_submit_delayed_urbs(struct usb_serial_port *port) +{ + struct sierra_port_private *portdata = usb_get_serial_port_data(port); + struct sierra_intf_private *intfdata; + struct urb *urb; + int ec = 0; + int err; + + intfdata = usb_get_serial_data(port->serial); + + for (;;) { + urb = usb_get_from_anchor(&portdata->delayed); + if (!urb) + break; + + usb_anchor_urb(urb, &portdata->active); + intfdata->in_flight++; + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err) { + dev_err(&port->dev, "%s - submit urb failed: %d", + __func__, err); + ec++; + intfdata->in_flight--; + usb_unanchor_urb(urb); + kfree(urb->transfer_buffer); + usb_free_urb(urb); + + spin_lock(&portdata->lock); + portdata->outstanding_urbs--; + spin_unlock(&portdata->lock); + } + } + + if (ec) + return -EIO; + + return 0; +} + +static int sierra_resume(struct usb_serial *serial) +{ + struct usb_serial_port *port; + struct sierra_intf_private *intfdata = usb_get_serial_data(serial); + int ec = 0; + int i, err; + + spin_lock_irq(&intfdata->susp_lock); + for (i = 0; i < serial->num_ports; i++) { + port = serial->port[i]; + + if (!tty_port_initialized(&port->port)) + continue; + + err = sierra_submit_delayed_urbs(port); + if (err) + ec++; + + err = sierra_submit_rx_urbs(port, GFP_ATOMIC); + if (err) + ec++; + } + intfdata->suspended = 0; + spin_unlock_irq(&intfdata->susp_lock); + + return ec ? -EIO : 0; +} + +#else +#define sierra_suspend NULL +#define sierra_resume NULL +#endif + +static struct usb_serial_driver sierra_device = { + .driver = { + .owner = THIS_MODULE, + .name = "sierra", + }, + .description = "Sierra USB modem", + .id_table = id_table, + .calc_num_ports = sierra_calc_num_ports, + .probe = sierra_probe, + .open = sierra_open, + .close = sierra_close, + .dtr_rts = sierra_dtr_rts, + .write = sierra_write, + .write_room = sierra_write_room, + .chars_in_buffer = sierra_chars_in_buffer, + .tiocmget = sierra_tiocmget, + .tiocmset = sierra_tiocmset, + .attach = sierra_startup, + .release = sierra_release, + .port_probe = sierra_port_probe, + .port_remove = sierra_port_remove, + .suspend = sierra_suspend, + .resume = sierra_resume, + .read_int_callback = sierra_instat_callback, +}; + +static struct usb_serial_driver * const serial_drivers[] = { + &sierra_device, NULL +}; + +module_usb_serial_driver(serial_drivers, id_table); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL v2"); + +module_param(nmea, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(nmea, "NMEA streaming"); |