* port is opened, as this have a huge impact on the network port
* throughput.
*
- * Interface 2: Standard modem interface - circuit switched interface, should
- * not be used.
+ * Interface 2: Standard modem interface - circuit switched interface, this
+ * can be used to make a standard ppp connection however it
+ * should not be used in conjunction with the IP network interface
+ * enabled for USB performance reasons i.e. if using this set
+ * ideally disable_net=1.
*
*****************************************************************************/
#include <linux/usb/cdc.h>
#include <net/arp.h>
#include <asm/byteorder.h>
+#include <linux/serial_core.h>
+#include <linux/serial.h>
#define DRIVER_VERSION "1.2"
#define HSO_NET_TX_TIMEOUT (HZ*10)
-/* Serial port defines and structs. */
-#define HSO_SERIAL_FLAG_RX_SENT 0
-
#define HSO_SERIAL_MAGIC 0x48534f31
/* Number of ttys to handle */
unsigned long flags;
};
+enum rx_ctrl_state{
+ RX_IDLE,
+ RX_SENT,
+ RX_PENDING
+};
+
+#define BM_REQUEST_TYPE (0xa1)
+#define B_NOTIFICATION (0x20)
+#define W_VALUE (0x0)
+#define W_INDEX (0x2)
+#define W_LENGTH (0x2)
+
+#define B_OVERRUN (0x1<<6)
+#define B_PARITY (0x1<<5)
+#define B_FRAMING (0x1<<4)
+#define B_RING_SIGNAL (0x1<<3)
+#define B_BREAK (0x1<<2)
+#define B_TX_CARRIER (0x1<<1)
+#define B_RX_CARRIER (0x1<<0)
+
+struct hso_serial_state_notification {
+ u8 bmRequestType;
+ u8 bNotification;
+ u16 wValue;
+ u16 wIndex;
+ u16 wLength;
+ u16 UART_state_bitmap;
+} __attribute__((packed));
+
+struct hso_tiocmget {
+ struct mutex mutex;
+ wait_queue_head_t waitq;
+ int intr_completed;
+ struct usb_endpoint_descriptor *endp;
+ struct urb *urb;
+ struct hso_serial_state_notification serial_state_notification;
+ u16 prev_UART_state_bitmap;
+ struct uart_icount icount;
+};
+
+
struct hso_serial {
struct hso_device *parent;
int magic;
struct usb_endpoint_descriptor *in_endp;
struct usb_endpoint_descriptor *out_endp;
- unsigned long flags;
+ enum rx_ctrl_state rx_state;
u8 rts_state;
u8 dtr_state;
unsigned tx_urb_used:1;
spinlock_t serial_lock;
int (*write_data) (struct hso_serial *serial);
+ struct hso_tiocmget *tiocmget;
+ /* Hacks required to get flow control
+ * working on the serial receive buffers
+ * so as not to drop characters on the floor.
+ */
+ int curr_rx_urb_idx;
+ u16 curr_rx_urb_offset;
+ u8 rx_urb_filled[MAX_RX_URBS];
+ struct tasklet_struct unthrottle_tasklet;
+ struct work_struct retry_unthrottle_workqueue;
+};
+
+struct hso_mutex_t {
+ struct mutex mutex;
+ u8 allocated;
};
struct hso_device {
struct device *dev;
struct kref ref;
- struct mutex mutex;
+ struct hso_mutex_t *mutex;
};
/* Type of interface */
static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear);
static void ctrl_callback(struct urb *urb);
-static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
+static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
static void hso_kick_transmit(struct hso_serial *serial);
/* Helper functions */
static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
static void hso_free_shared_int(struct hso_shared_int *shared_int);
static int hso_stop_net_device(struct hso_device *hso_dev);
static void hso_serial_ref_free(struct kref *ref);
+static void hso_std_serial_read_bulk_callback(struct urb *urb);
+static int hso_mux_serial_read(struct hso_serial *serial);
static void async_get_intf(struct work_struct *data);
static void async_put_intf(struct work_struct *data);
static int hso_put_activity(struct hso_device *hso_dev);
static int hso_get_activity(struct hso_device *hso_dev);
-
+static void tiocmget_intr_callback(struct urb *urb);
/*****************************************************************************/
/* Helping functions */
/*****************************************************************************/
static spinlock_t serial_table_lock;
static struct ktermios *hso_serial_termios[HSO_SERIAL_TTY_MINORS];
static struct ktermios *hso_serial_termios_locked[HSO_SERIAL_TTY_MINORS];
+/* hso_mutex_table has to be declared statically as hso_device
+ * is freed in hso_serial_open & hso_serial_close while
+ * the mutex is still in use.
+ */
+#define HSO_NUM_MUTEXES (HSO_SERIAL_TTY_MINORS+HSO_MAX_NET_DEVICES)
+static struct hso_mutex_t hso_mutex_table[HSO_NUM_MUTEXES];
+static spinlock_t hso_mutex_lock;
static const s32 default_port_spec[] = {
HSO_INTF_MUX | HSO_PORT_NETWORK,
{default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
{icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
{icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
- {default_port_device(0x0af0, 0xd033)}, /* Icon-322 */
+ {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
{USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
{USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
{USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
{USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
{USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
+ {USB_DEVICE(0x0af0, 0x7701)},
+ {USB_DEVICE(0x0af0, 0x7801)},
+ {USB_DEVICE(0x0af0, 0x7901)},
+ {USB_DEVICE(0x0af0, 0x7361)},
+ {icon321_port_device(0x0af0, 0xd051)},
{}
};
MODULE_DEVICE_TABLE(usb, hso_ids);
}
static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
+static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
+{
+ int idx;
+
+ for (idx = 0; idx < serial->num_rx_urbs; idx++)
+ if (serial->rx_urb[idx] == urb)
+ return idx;
+ dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
+ return -1;
+}
+
/* converts mux value to a port spec value */
static u32 hso_mux_to_port(int mux)
{
spin_unlock_irqrestore(&serial_table_lock, flags);
}
+
+static struct hso_mutex_t *hso_get_free_mutex(void)
+{
+ int index;
+ struct hso_mutex_t *curr_hso_mutex;
+
+ spin_lock(&hso_mutex_lock);
+ for (index = 0; index < HSO_NUM_MUTEXES; index++) {
+ curr_hso_mutex = &hso_mutex_table[index];
+ if (!curr_hso_mutex->allocated) {
+ curr_hso_mutex->allocated = 1;
+ spin_unlock(&hso_mutex_lock);
+ return curr_hso_mutex;
+ }
+ }
+ printk(KERN_ERR "BUG %s: no free hso_mutexs devices in table\n"
+ , __func__);
+ spin_unlock(&hso_mutex_lock);
+ return NULL;
+}
+
+static void hso_free_mutex(struct hso_mutex_t *mutex)
+{
+ spin_lock(&hso_mutex_lock);
+ mutex->allocated = 0;
+ spin_unlock(&hso_mutex_lock);
+}
+
/* log a meaningful explanation of an USB status */
static void log_usb_status(int status, const char *function)
{
return;
}
+static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
+{
+ int result;
+#ifdef CONFIG_HSO_AUTOPM
+ usb_mark_last_busy(urb->dev);
+#endif
+ /* We are done with this URB, resubmit it. Prep the USB to wait for
+ * another frame */
+ usb_fill_bulk_urb(urb, serial->parent->usb,
+ usb_rcvbulkpipe(serial->parent->usb,
+ serial->in_endp->
+ bEndpointAddress & 0x7F),
+ urb->transfer_buffer, serial->rx_data_length,
+ hso_std_serial_read_bulk_callback, serial);
+ /* Give this to the USB subsystem so it can tell us when more data
+ * arrives. */
+ result = usb_submit_urb(urb, GFP_ATOMIC);
+ if (result) {
+ dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
+ __func__, result);
+ }
+}
+
+
+
+
+static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
+{
+ int count;
+ struct urb *curr_urb;
+
+ while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
+ curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
+ count = put_rxbuf_data(curr_urb, serial);
+ if (count == -1)
+ return;
+ if (count == 0) {
+ serial->curr_rx_urb_idx++;
+ if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
+ serial->curr_rx_urb_idx = 0;
+ hso_resubmit_rx_bulk_urb(serial, curr_urb);
+ }
+ }
+}
+
+static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
+{
+ int count = 0;
+ struct urb *urb;
+
+ urb = serial->rx_urb[0];
+ if (serial->open_count > 0) {
+ count = put_rxbuf_data(urb, serial);
+ if (count == -1)
+ return;
+ }
+ /* Re issue a read as long as we receive data. */
+
+ if (count == 0 && ((urb->actual_length != 0) ||
+ (serial->rx_state == RX_PENDING))) {
+ serial->rx_state = RX_SENT;
+ hso_mux_serial_read(serial);
+ } else
+ serial->rx_state = RX_IDLE;
+}
+
+
+/* read callback for Diag and CS port */
+static void hso_std_serial_read_bulk_callback(struct urb *urb)
+{
+ struct hso_serial *serial = urb->context;
+ int status = urb->status;
+
+ /* sanity check */
+ if (!serial) {
+ D1("serial == NULL");
+ return;
+ } else if (status) {
+ log_usb_status(status, __func__);
+ return;
+ }
+
+ D4("\n--- Got serial_read_bulk callback %02x ---", status);
+ D1("Actual length = %d\n", urb->actual_length);
+ DUMP1(urb->transfer_buffer, urb->actual_length);
+
+ /* Anyone listening? */
+ if (serial->open_count == 0)
+ return;
+
+ if (status == 0) {
+ if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
+ u32 rest;
+ u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
+ rest =
+ urb->actual_length %
+ serial->in_endp->wMaxPacketSize;
+ if (((rest == 5) || (rest == 6))
+ && !memcmp(((u8 *) urb->transfer_buffer) +
+ urb->actual_length - 4, crc_check, 4)) {
+ urb->actual_length -= 4;
+ }
+ }
+ /* Valid data, handle RX data */
+ spin_lock(&serial->serial_lock);
+ serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
+ put_rxbuf_data_and_resubmit_bulk_urb(serial);
+ spin_unlock(&serial->serial_lock);
+ } else if (status == -ENOENT || status == -ECONNRESET) {
+ /* Unlinked - check for throttled port. */
+ D2("Port %d, successfully unlinked urb", serial->minor);
+ spin_lock(&serial->serial_lock);
+ serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
+ hso_resubmit_rx_bulk_urb(serial, urb);
+ spin_unlock(&serial->serial_lock);
+ } else {
+ D2("Port %d, status = %d for read urb", serial->minor, status);
+ return;
+ }
+}
+
+/*
+ * This needs to be a tasklet otherwise we will
+ * end up recursively calling this function.
+ */
+void hso_unthrottle_tasklet(struct hso_serial *serial)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&serial->serial_lock, flags);
+ if ((serial->parent->port_spec & HSO_INTF_MUX))
+ put_rxbuf_data_and_resubmit_ctrl_urb(serial);
+ else
+ put_rxbuf_data_and_resubmit_bulk_urb(serial);
+ spin_unlock_irqrestore(&serial->serial_lock, flags);
+}
+
+static void hso_unthrottle(struct tty_struct *tty)
+{
+ struct hso_serial *serial = get_serial_by_tty(tty);
+
+ tasklet_hi_schedule(&serial->unthrottle_tasklet);
+}
+
+void hso_unthrottle_workfunc(struct work_struct *work)
+{
+ struct hso_serial *serial =
+ container_of(work, struct hso_serial,
+ retry_unthrottle_workqueue);
+ hso_unthrottle_tasklet(serial);
+}
+
/* open the requested serial port */
static int hso_serial_open(struct tty_struct *tty, struct file *filp)
{
struct hso_serial *serial = get_serial_by_index(tty->index);
- int result;
+ int result1 = 0, result2 = 0;
+ struct mutex *hso_mutex = NULL;
+ int refcnt = 1;
/* sanity check */
if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
return -ENODEV;
}
- mutex_lock(&serial->parent->mutex);
- result = usb_autopm_get_interface(serial->parent->interface);
- if (result < 0)
+ hso_mutex = &serial->parent->mutex->mutex;
+ mutex_lock(hso_mutex);
+ /* check for port already opened, if not set the termios */
+ /* The serial->open count needs to be here as hso_serial_close
+ * will be called even if hso_serial_open returns -ENODEV.
+ */
+ serial->open_count++;
+ result1 = usb_autopm_get_interface(serial->parent->interface);
+ if (result1 < 0)
goto err_out;
D1("Opening %d", serial->minor);
tty->driver_data = serial;
serial->tty = tty;
- /* check for port allready opened, if not set the termios */
- serial->open_count++;
if (serial->open_count == 1) {
tty->low_latency = 1;
- serial->flags = 0;
+ serial->rx_state = RX_IDLE;
/* Force default termio settings */
_hso_serial_set_termios(tty, NULL);
- result = hso_start_serial_device(serial->parent, GFP_KERNEL);
- if (result) {
+ tasklet_init(&serial->unthrottle_tasklet,
+ (void (*)(unsigned long))hso_unthrottle_tasklet,
+ (unsigned long)serial);
+ INIT_WORK(&serial->retry_unthrottle_workqueue,
+ hso_unthrottle_workfunc);
+ result2 = hso_start_serial_device(serial->parent, GFP_KERNEL);
+ if (result2) {
hso_stop_serial_device(serial->parent);
serial->open_count--;
- kref_put(&serial->parent->ref, hso_serial_ref_free);
}
} else {
D1("Port was already open");
usb_autopm_put_interface(serial->parent->interface);
/* done */
- if (result)
+ if (result1)
hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
err_out:
- mutex_unlock(&serial->parent->mutex);
- return result;
+ if (result2)
+ refcnt = kref_put(&serial->parent->ref, hso_serial_ref_free);
+ mutex_unlock(hso_mutex);
+ if (refcnt == 0)
+ hso_free_mutex(container_of(hso_mutex,
+ struct hso_mutex_t, mutex));
+ return result1 == 0 ? result2 : result1;
}
/* close the requested serial port */
{
struct hso_serial *serial = tty->driver_data;
u8 usb_gone;
+ struct mutex *hso_mutex;
+ int refcnt;
D1("Closing serial port");
+ if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
+ D1("invalid serial structure bailing out.\n");
+ return;
+ }
- mutex_lock(&serial->parent->mutex);
usb_gone = serial->parent->usb_gone;
+ hso_mutex = &serial->parent->mutex->mutex;
+ mutex_lock(hso_mutex);
if (!usb_gone)
usb_autopm_get_interface(serial->parent->interface);
/* reset the rts and dtr */
/* do the actual close */
serial->open_count--;
- kref_put(&serial->parent->ref, hso_serial_ref_free);
if (serial->open_count <= 0) {
serial->open_count = 0;
if (serial->tty) {
}
if (!usb_gone)
hso_stop_serial_device(serial->parent);
+ tasklet_kill(&serial->unthrottle_tasklet);
+ cancel_work_sync(&serial->retry_unthrottle_workqueue);
}
+
if (!usb_gone)
usb_autopm_put_interface(serial->parent->interface);
- mutex_unlock(&serial->parent->mutex);
+ refcnt = kref_put(&serial->parent->ref, hso_serial_ref_free);
+ mutex_unlock(hso_mutex);
+ if (refcnt == 0)
+ hso_free_mutex(container_of(hso_mutex,
+ struct hso_mutex_t, mutex));
}
/* close the requested serial port */
return chars;
}
+int tiocmget_submit_urb(struct hso_serial *serial,
+ struct hso_tiocmget *tiocmget,
+ struct usb_device *usb)
+{
+ int result;
+
+ if (serial->parent->usb_gone)
+ return -ENODEV;
+ usb_fill_int_urb(tiocmget->urb, usb,
+ usb_rcvintpipe(usb,
+ tiocmget->endp->
+ bEndpointAddress & 0x7F),
+ &tiocmget->serial_state_notification,
+ sizeof(struct hso_serial_state_notification),
+ tiocmget_intr_callback, serial,
+ tiocmget->endp->bInterval);
+ result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
+ if (result) {
+ dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
+ result);
+ }
+ return result;
+
+}
+
+static void tiocmget_intr_callback(struct urb *urb)
+{
+ struct hso_serial *serial = urb->context;
+ struct hso_tiocmget *tiocmget;
+ int status = urb->status;
+ u16 UART_state_bitmap, prev_UART_state_bitmap;
+ struct uart_icount *icount;
+ struct hso_serial_state_notification *serial_state_notification;
+ struct usb_device *usb;
+
+ /* Sanity checks */
+ if (!serial)
+ return;
+ if (status) {
+ log_usb_status(status, __func__);
+ return;
+ }
+ tiocmget = serial->tiocmget;
+ if (!tiocmget)
+ return;
+ usb = serial->parent->usb;
+ serial_state_notification = &tiocmget->serial_state_notification;
+ if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
+ serial_state_notification->bNotification != B_NOTIFICATION ||
+ le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
+ le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
+ le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
+ dev_warn(&usb->dev,
+ "hso received invalid serial state notification\n");
+ DUMP(serial_state_notification,
+ sizeof(hso_serial_state_notifation))
+ } else {
+
+ UART_state_bitmap = le16_to_cpu(serial_state_notification->
+ UART_state_bitmap);
+ prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
+ icount = &tiocmget->icount;
+ spin_lock(&serial->serial_lock);
+ if ((UART_state_bitmap & B_OVERRUN) !=
+ (prev_UART_state_bitmap & B_OVERRUN))
+ icount->parity++;
+ if ((UART_state_bitmap & B_PARITY) !=
+ (prev_UART_state_bitmap & B_PARITY))
+ icount->parity++;
+ if ((UART_state_bitmap & B_FRAMING) !=
+ (prev_UART_state_bitmap & B_FRAMING))
+ icount->frame++;
+ if ((UART_state_bitmap & B_RING_SIGNAL) &&
+ !(prev_UART_state_bitmap & B_RING_SIGNAL))
+ icount->rng++;
+ if ((UART_state_bitmap & B_BREAK) !=
+ (prev_UART_state_bitmap & B_BREAK))
+ icount->brk++;
+ if ((UART_state_bitmap & B_TX_CARRIER) !=
+ (prev_UART_state_bitmap & B_TX_CARRIER))
+ icount->dsr++;
+ if ((UART_state_bitmap & B_RX_CARRIER) !=
+ (prev_UART_state_bitmap & B_RX_CARRIER))
+ icount->dcd++;
+ tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
+ spin_unlock(&serial->serial_lock);
+ tiocmget->intr_completed = 1;
+ wake_up_interruptible(&tiocmget->waitq);
+ }
+ memset(serial_state_notification, 0,
+ sizeof(struct hso_serial_state_notification));
+ tiocmget_submit_urb(serial,
+ tiocmget,
+ serial->parent->usb);
+}
+
+/*
+ * next few functions largely stolen from drivers/serial/serial_core.c
+ */
+/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
+ * - mask passed in arg for lines of interest
+ * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
+ * Caller should use TIOCGICOUNT to see which one it was
+ */
+static int
+hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
+{
+ DECLARE_WAITQUEUE(wait, current);
+ struct uart_icount cprev, cnow;
+ struct hso_tiocmget *tiocmget;
+ int ret;
+
+ tiocmget = serial->tiocmget;
+ if (!tiocmget)
+ return -ENOENT;
+ /*
+ * note the counters on entry
+ */
+ spin_lock_irq(&serial->serial_lock);
+ memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
+ spin_unlock_irq(&serial->serial_lock);
+ add_wait_queue(&tiocmget->waitq, &wait);
+ for (;;) {
+ spin_lock_irq(&serial->serial_lock);
+ memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
+ spin_unlock_irq(&serial->serial_lock);
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
+ ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
+ ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
+ ret = 0;
+ break;
+ }
+ schedule();
+ /* see if a signal did it */
+ if (signal_pending(current)) {
+ ret = -ERESTARTSYS;
+ break;
+ }
+ cprev = cnow;
+ }
+ current->state = TASK_RUNNING;
+ remove_wait_queue(&tiocmget->waitq, &wait);
+
+ return ret;
+}
+
+/*
+ * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+ * Return: write counters to the user passed counter struct
+ * NB: both 1->0 and 0->1 transitions are counted except for
+ * RI where only 0->1 is counted.
+ */
+static int hso_get_count(struct hso_serial *serial,
+ struct serial_icounter_struct __user *icnt)
+{
+ struct serial_icounter_struct icount;
+ struct uart_icount cnow;
+ struct hso_tiocmget *tiocmget = serial->tiocmget;
+
+ if (!tiocmget)
+ return -ENOENT;
+ spin_lock_irq(&serial->serial_lock);
+ memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
+ spin_unlock_irq(&serial->serial_lock);
+
+ icount.cts = cnow.cts;
+ icount.dsr = cnow.dsr;
+ icount.rng = cnow.rng;
+ icount.dcd = cnow.dcd;
+ icount.rx = cnow.rx;
+ icount.tx = cnow.tx;
+ icount.frame = cnow.frame;
+ icount.overrun = cnow.overrun;
+ icount.parity = cnow.parity;
+ icount.brk = cnow.brk;
+ icount.buf_overrun = cnow.buf_overrun;
+
+ return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
+}
+
static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
{
- unsigned int value;
+ int retval;
struct hso_serial *serial = get_serial_by_tty(tty);
- unsigned long flags;
+ struct hso_tiocmget *tiocmget;
+ u16 UART_state_bitmap;
/* sanity check */
if (!serial) {
D1("no tty structures");
return -EINVAL;
}
-
- spin_lock_irqsave(&serial->serial_lock, flags);
- value = ((serial->rts_state) ? TIOCM_RTS : 0) |
+ spin_lock_irq(&serial->serial_lock);
+ retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
((serial->dtr_state) ? TIOCM_DTR : 0);
- spin_unlock_irqrestore(&serial->serial_lock, flags);
+ tiocmget = serial->tiocmget;
+ if (tiocmget) {
- return value;
+ UART_state_bitmap = le16_to_cpu(
+ tiocmget->prev_UART_state_bitmap);
+ if (UART_state_bitmap & B_RING_SIGNAL)
+ retval |= TIOCM_RNG;
+ if (UART_state_bitmap & B_RX_CARRIER)
+ retval |= TIOCM_CD;
+ if (UART_state_bitmap & B_TX_CARRIER)
+ retval |= TIOCM_DSR;
+ }
+ spin_unlock_irq(&serial->serial_lock);
+ return retval;
}
static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
USB_CTRL_SET_TIMEOUT);
}
+static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct hso_serial *serial = get_serial_by_tty(tty);
+ void __user *uarg = (void __user *)arg;
+ int ret = 0;
+ D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
+
+ if (!serial)
+ return -ENODEV;
+ switch (cmd) {
+ case TIOCMIWAIT:
+ ret = hso_wait_modem_status(serial, arg);
+ break;
+
+ case TIOCGICOUNT:
+ ret = hso_get_count(serial, uarg);
+ break;
+ default:
+ ret = -ENOIOCTLCMD;
+ break;
+ }
+ return ret;
+}
+
+
/* starts a transmit */
static void hso_kick_transmit(struct hso_serial *serial)
{
(1 << i));
if (serial != NULL) {
D1("Pending read interrupt on port %d\n", i);
- if (!test_and_set_bit(HSO_SERIAL_FLAG_RX_SENT,
- &serial->flags)) {
+ spin_lock(&serial->serial_lock);
+ if (serial->rx_state == RX_IDLE) {
/* Setup and send a ctrl req read on
* port i */
- hso_mux_serial_read(serial);
+ if (!serial->rx_urb_filled[0]) {
+ serial->rx_state = RX_SENT;
+ hso_mux_serial_read(serial);
+ } else
+ serial->rx_state = RX_PENDING;
+
} else {
D1("Already pending a read on "
"port %d\n", i);
}
+ spin_unlock(&serial->serial_lock);
}
}
}
if (req->bRequestType ==
(USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
/* response to a read command */
- if (serial->open_count > 0) {
- /* handle RX data the normal way */
- put_rxbuf_data(urb, serial);
- }
-
- /* Re issue a read as long as we receive data. */
- if (urb->actual_length != 0)
- hso_mux_serial_read(serial);
- else
- clear_bit(HSO_SERIAL_FLAG_RX_SENT, &serial->flags);
+ serial->rx_urb_filled[0] = 1;
+ spin_lock(&serial->serial_lock);
+ put_rxbuf_data_and_resubmit_ctrl_urb(serial);
+ spin_unlock(&serial->serial_lock);
} else {
hso_put_activity(serial->parent);
if (serial->tty)
}
/* handle RX data for serial port */
-static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
+static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
{
struct tty_struct *tty = serial->tty;
-
+ int write_length_remaining = 0;
+ int curr_write_len;
/* Sanity check */
if (urb == NULL || serial == NULL) {
D1("serial = NULL");
- return;
+ return -2;
}
/* Push data to tty */
- if (tty && urb->actual_length) {
+ if (tty) {
+ write_length_remaining = urb->actual_length -
+ serial->curr_rx_urb_offset;
D1("data to push to tty");
- tty_insert_flip_string(tty, urb->transfer_buffer,
- urb->actual_length);
- tty_flip_buffer_push(tty);
- }
-}
-
-/* read callback for Diag and CS port */
-static void hso_std_serial_read_bulk_callback(struct urb *urb)
-{
- struct hso_serial *serial = urb->context;
- int result;
- int status = urb->status;
-
- /* sanity check */
- if (!serial) {
- D1("serial == NULL");
- return;
- } else if (status) {
- log_usb_status(status, __func__);
- return;
- }
-
- D4("\n--- Got serial_read_bulk callback %02x ---", status);
- D1("Actual length = %d\n", urb->actual_length);
- DUMP1(urb->transfer_buffer, urb->actual_length);
-
- /* Anyone listening? */
- if (serial->open_count == 0)
- return;
-
- if (status == 0) {
- if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
- u32 rest;
- u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
- rest =
- urb->actual_length %
- serial->in_endp->wMaxPacketSize;
- if (((rest == 5) || (rest == 6))
- && !memcmp(((u8 *) urb->transfer_buffer) +
- urb->actual_length - 4, crc_check, 4)) {
- urb->actual_length -= 4;
- }
+ while (write_length_remaining) {
+ if (test_bit(TTY_THROTTLED, &tty->flags))
+ return -1;
+ curr_write_len = tty_insert_flip_string
+ (tty, urb->transfer_buffer +
+ serial->curr_rx_urb_offset,
+ write_length_remaining);
+ serial->curr_rx_urb_offset += curr_write_len;
+ write_length_remaining -= curr_write_len;
+ tty_flip_buffer_push(tty);
}
- /* Valid data, handle RX data */
- put_rxbuf_data(urb, serial);
- } else if (status == -ENOENT || status == -ECONNRESET) {
- /* Unlinked - check for throttled port. */
- D2("Port %d, successfully unlinked urb", serial->minor);
- } else {
- D2("Port %d, status = %d for read urb", serial->minor, status);
- return;
}
-
- usb_mark_last_busy(urb->dev);
-
- /* We are done with this URB, resubmit it. Prep the USB to wait for
- * another frame */
- usb_fill_bulk_urb(urb, serial->parent->usb,
- usb_rcvbulkpipe(serial->parent->usb,
- serial->in_endp->
- bEndpointAddress & 0x7F),
- urb->transfer_buffer, serial->rx_data_length,
- hso_std_serial_read_bulk_callback, serial);
- /* Give this to the USB subsystem so it can tell us when more data
- * arrives. */
- result = usb_submit_urb(urb, GFP_ATOMIC);
- if (result) {
- dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d",
- __func__, result);
+ if (write_length_remaining == 0) {
+ serial->curr_rx_urb_offset = 0;
+ serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
}
+ return write_length_remaining;
}
+
/* Base driver functions */
static void hso_log_port(struct hso_device *hso_dev)
serial->shared_int->use_count++;
mutex_unlock(&serial->shared_int->shared_int_lock);
}
-
+ if (serial->tiocmget)
+ tiocmget_submit_urb(serial,
+ serial->tiocmget,
+ serial->parent->usb);
return result;
}
{
int i;
struct hso_serial *serial = dev2ser(hso_dev);
+ struct hso_tiocmget *tiocmget;
if (!serial)
return -ENODEV;
for (i = 0; i < serial->num_rx_urbs; i++) {
- if (serial->rx_urb[i])
+ if (serial->rx_urb[i]) {
usb_kill_urb(serial->rx_urb[i]);
+ serial->rx_urb_filled[i] = 0;
+ }
}
+ serial->curr_rx_urb_idx = 0;
+ serial->curr_rx_urb_offset = 0;
if (serial->tx_urb)
usb_kill_urb(serial->tx_urb);
}
mutex_unlock(&serial->shared_int->shared_int_lock);
}
+ tiocmget = serial->tiocmget;
+ if (tiocmget) {
+ wake_up_interruptible(&tiocmget->waitq);
+ usb_kill_urb(tiocmget->urb);
+ }
return 0;
}
hso_dev->usb = interface_to_usbdev(intf);
hso_dev->interface = intf;
kref_init(&hso_dev->ref);
- mutex_init(&hso_dev->mutex);
-
+ hso_dev->mutex = hso_get_free_mutex();
+ if (!hso_dev->mutex) {
+ kfree(hso_dev);
+ return NULL;
+ }
+ mutex_init(&hso_dev->mutex->mutex);
INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
unregister_netdev(hso_net->net);
free_netdev(hso_net->net);
}
-
+ hso_free_mutex(hso_dev->mutex);
hso_free_device(hso_dev);
}
int enabled = (state == RFKILL_STATE_ON);
int rv;
- mutex_lock(&hso_dev->mutex);
+ mutex_lock(&hso_dev->mutex->mutex);
if (hso_dev->usb_gone)
rv = 0;
else
rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
USB_CTRL_SET_TIMEOUT);
- mutex_unlock(&hso_dev->mutex);
+ mutex_unlock(&hso_dev->mutex->mutex);
return rv;
}
struct usb_interface *interface)
{
struct hso_net *hso_net = dev2net(hso_dev);
- struct device *dev = hso_dev->dev;
+ struct device *dev = &hso_net->net->dev;
char *rfkn;
hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev,
- RFKILL_TYPE_WLAN);
+ RFKILL_TYPE_WWAN);
if (!hso_net->rfkill) {
- dev_err(dev, "%s - Out of memory", __func__);
+ dev_err(dev, "%s - Out of memory\n", __func__);
return;
}
rfkn = kzalloc(20, GFP_KERNEL);
if (!rfkn) {
rfkill_free(hso_net->rfkill);
- dev_err(dev, "%s - Out of memory", __func__);
+ hso_net->rfkill = NULL;
+ dev_err(dev, "%s - Out of memory\n", __func__);
return;
}
snprintf(rfkn, 20, "hso-%d",
kfree(rfkn);
hso_net->rfkill->name = NULL;
rfkill_free(hso_net->rfkill);
- dev_err(dev, "%s - Failed to register rfkill", __func__);
+ hso_net->rfkill = NULL;
+ dev_err(dev, "%s - Failed to register rfkill\n", __func__);
return;
}
}
return NULL;
}
+static void hso_free_tiomget(struct hso_serial *serial)
+{
+ struct hso_tiocmget *tiocmget = serial->tiocmget;
+ if (tiocmget) {
+ kfree(tiocmget);
+ if (tiocmget->urb) {
+ usb_free_urb(tiocmget->urb);
+ tiocmget->urb = NULL;
+ }
+ serial->tiocmget = NULL;
+
+ }
+}
+
/* Frees an AT channel ( goes for both mux and non-mux ) */
static void hso_free_serial_device(struct hso_device *hso_dev)
{
else
mutex_unlock(&serial->shared_int->shared_int_lock);
}
+ hso_free_tiomget(serial);
kfree(serial);
hso_free_device(hso_dev);
}
struct hso_device *hso_dev;
struct hso_serial *serial;
int num_urbs;
+ struct hso_tiocmget *tiocmget;
hso_dev = hso_create_device(interface, port);
if (!hso_dev)
serial->parent = hso_dev;
hso_dev->port_data.dev_serial = serial;
- if (port & HSO_PORT_MODEM)
+ if (port & HSO_PORT_MODEM) {
num_urbs = 2;
+ serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
+ GFP_KERNEL);
+ /* it isn't going to break our heart if serial->tiocmget
+ * allocation fails don't bother checking this.
+ */
+ if (serial->tiocmget) {
+ tiocmget = serial->tiocmget;
+ tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (tiocmget->urb) {
+ mutex_init(&tiocmget->mutex);
+ init_waitqueue_head(&tiocmget->waitq);
+ tiocmget->endp = hso_get_ep(
+ interface,
+ USB_ENDPOINT_XFER_INT,
+ USB_DIR_IN);
+ } else
+ hso_free_tiomget(serial);
+ }
+ }
else
num_urbs = 1;
USB_DIR_IN);
if (!serial->in_endp) {
dev_err(&interface->dev, "Failed to find BULK IN ep\n");
- goto exit;
+ goto exit2;
}
if (!
(serial->out_endp =
hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
dev_err(&interface->dev, "Failed to find BULK IN ep\n");
- goto exit;
+ goto exit2;
}
serial->write_data = hso_std_serial_write_data;
/* done, return it */
return hso_dev;
+
+exit2:
+ hso_serial_common_free(serial);
exit:
- if (hso_dev && serial)
- hso_serial_common_free(serial);
+ hso_free_tiomget(serial);
kfree(serial);
hso_free_device(hso_dev);
return NULL;
if (network_table[i] &&
(network_table[i]->interface == iface)) {
hso_net = dev2net(network_table[i]);
- /* First transmit any lingering data, then restart the
- * device. */
- if (hso_net->skb_tx_buf) {
- dev_dbg(&iface->dev,
- "Transmitting lingering data\n");
- hso_net_start_xmit(hso_net->skb_tx_buf,
- hso_net->net);
+ if (hso_net->flags & IFF_UP) {
+ /* First transmit any lingering data,
+ then restart the device. */
+ if (hso_net->skb_tx_buf) {
+ dev_dbg(&iface->dev,
+ "Transmitting"
+ " lingering data\n");
+ hso_net_start_xmit(hso_net->skb_tx_buf,
+ hso_net->net);
+ hso_net->skb_tx_buf = NULL;
+ }
+ result = hso_start_net_device(network_table[i]);
+ if (result)
+ goto out;
}
- result = hso_start_net_device(network_table[i]);
- if (result)
- goto out;
}
}
{
struct hso_serial *hso_dev;
int i;
+ struct mutex *hso_mutex = NULL;
+ int refcnt = 1;
for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
if (serial_table[i]
hso_dev = dev2ser(serial_table[i]);
if (hso_dev->tty)
tty_hangup(hso_dev->tty);
- mutex_lock(&hso_dev->parent->mutex);
+ hso_mutex = &hso_dev->parent->mutex->mutex;
+ mutex_lock(hso_mutex);
hso_dev->parent->usb_gone = 1;
- mutex_unlock(&hso_dev->parent->mutex);
- kref_put(&serial_table[i]->ref, hso_serial_ref_free);
+ refcnt = kref_put(&serial_table[i]->ref,
+ hso_serial_ref_free);
+ mutex_unlock(hso_mutex);
}
}
hso_free_net_device(network_table[i]);
}
}
+ if (refcnt == 0)
+ hso_free_mutex(container_of(hso_mutex,
+ struct hso_mutex_t, mutex));
}
/* Helper functions */
.close = hso_serial_close,
.write = hso_serial_write,
.write_room = hso_serial_write_room,
+ .ioctl = hso_serial_ioctl,
.set_termios = hso_serial_set_termios,
.chars_in_buffer = hso_serial_chars_in_buffer,
.tiocmget = hso_serial_tiocmget,
.tiocmset = hso_serial_tiocmset,
+ .unthrottle = hso_unthrottle
};
static struct usb_driver hso_driver = {
.id_table = hso_ids,
.suspend = hso_suspend,
.resume = hso_resume,
+ .reset_resume = hso_resume,
.supports_autosuspend = 1,
};
/* Initialise the serial table semaphore and table */
spin_lock_init(&serial_table_lock);
+ spin_lock_init(&hso_mutex_lock);
for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
serial_table[i] = NULL;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff