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OpenCloudOS-Kernel/drivers/usb/serial/sierra.c

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// 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;
/* Used in interface blacklisting */
struct sierra_iface_info {
const u32 infolen; /* number of interface numbers on blacklist */
const u8 *ifaceinfo; /* pointer to the array holding the numbers */
};
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 int is_blacklisted(const u8 ifnum,
const struct sierra_iface_info *blacklist)
{
const u8 *info;
int i;
if (blacklist) {
info = blacklist->ifaceinfo;
for (i = 0; i < blacklist->infolen; i++) {
if (info[i] == ifnum)
return 1;
}
}
return 0;
}
static int is_himemory(const u8 ifnum,
const struct sierra_iface_info *himemorylist)
{
const u8 *info;
int i;
if (himemorylist) {
info = himemorylist->ifaceinfo;
for (i=0; i < himemorylist->infolen; i++) {
if (info[i] == ifnum)
return 1;
}
}
return 0;
}
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)
{
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);
}
if (is_blacklisted(ifnum,
(struct sierra_iface_info *)id->driver_info)) {
dev_dbg(&serial->dev->dev,
"Ignoring blacklisted 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_info typeA_interface_list = {
.infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
.ifaceinfo = hi_memory_typeA_ifaces,
};
static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
static const struct sierra_iface_info typeB_interface_list = {
.infolen = ARRAY_SIZE(hi_memory_typeB_ifaces),
.ifaceinfo = hi_memory_typeB_ifaces,
};
/* 'blacklist' 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_info direct_ip_interface_blacklist = {
.infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
.ifaceinfo = 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_blacklist
},
{ USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68AA, 0xFF, 0xFF, 0xFF),
.driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
},
{ 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_blacklist
},
/* Airprime/Sierra Wireless Direct IP modems */
{ USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68A3, 0xFF, 0xFF, 0xFF),
.driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
},
{ }
};
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 =
(struct usb_ctrlrequest *)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_info *himemoryp;
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);
himemoryp = &typeB_interface_list;
} else {
/* This is really the usb-serial port number of the interface
* rather than the interface number.
*/
ifnum = port->port_number;
himemoryp = &typeA_interface_list;
}
if (is_himemory(ifnum, himemoryp)) {
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");
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