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path: root/drivers/isdn/gigaset/usb-gigaset.c
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Diffstat (limited to 'drivers/isdn/gigaset/usb-gigaset.c')
-rw-r--r--drivers/isdn/gigaset/usb-gigaset.c1008
1 files changed, 1008 insertions, 0 deletions
diff --git a/drivers/isdn/gigaset/usb-gigaset.c b/drivers/isdn/gigaset/usb-gigaset.c
new file mode 100644
index 00000000000..323fc7349de
--- /dev/null
+++ b/drivers/isdn/gigaset/usb-gigaset.c
@@ -0,0 +1,1008 @@
+/*
+ * USB driver for Gigaset 307x directly or using M105 Data.
+ *
+ * Copyright (c) 2001 by Stefan Eilers <Eilers.Stefan@epost.de>
+ * and Hansjoerg Lipp <hjlipp@web.de>.
+ *
+ * This driver was derived from the USB skeleton driver by
+ * Greg Kroah-Hartman <greg@kroah.com>
+ *
+ * =====================================================================
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ * =====================================================================
+ * ToDo: ...
+ * =====================================================================
+ * Version: $Id: usb-gigaset.c,v 1.85.4.18 2006/02/04 18:28:16 hjlipp Exp $
+ * =====================================================================
+ */
+
+#include "gigaset.h"
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+
+/* Version Information */
+#define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers <Eilers.Stefan@epost.de>"
+#define DRIVER_DESC "USB Driver for Gigaset 307x using M105"
+
+/* Module parameters */
+
+static int startmode = SM_ISDN;
+static int cidmode = 1;
+
+module_param(startmode, int, S_IRUGO);
+module_param(cidmode, int, S_IRUGO);
+MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
+MODULE_PARM_DESC(cidmode, "Call-ID mode");
+
+#define GIGASET_MINORS 1
+#define GIGASET_MINOR 8
+#define GIGASET_MODULENAME "usb_gigaset"
+#define GIGASET_DEVFSNAME "gig/usb/"
+#define GIGASET_DEVNAME "ttyGU"
+
+#define IF_WRITEBUF 2000 //FIXME // WAKEUP_CHARS: 256
+
+/* Values for the Gigaset M105 Data */
+#define USB_M105_VENDOR_ID 0x0681
+#define USB_M105_PRODUCT_ID 0x0009
+
+/* table of devices that work with this driver */
+static struct usb_device_id gigaset_table [] = {
+ { USB_DEVICE(USB_M105_VENDOR_ID, USB_M105_PRODUCT_ID) },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, gigaset_table);
+
+/* Get a minor range for your devices from the usb maintainer */
+#define USB_SKEL_MINOR_BASE 200
+
+
+/*
+ * Control requests (empty fields: 00)
+ *
+ * RT|RQ|VALUE|INDEX|LEN |DATA
+ * In:
+ * C1 08 01
+ * Get flags (1 byte). Bits: 0=dtr,1=rts,3-7:?
+ * C1 0F ll ll
+ * Get device information/status (llll: 0x200 and 0x40 seen).
+ * Real size: I only saw MIN(llll,0x64).
+ * Contents: seems to be always the same...
+ * offset 0x00: Length of this structure (0x64) (len: 1,2,3 bytes)
+ * offset 0x3c: String (16 bit chars): "MCCI USB Serial V2.0"
+ * rest: ?
+ * Out:
+ * 41 11
+ * Initialize/reset device ?
+ * 41 00 xx 00
+ * ? (xx=00 or 01; 01 on start, 00 on close)
+ * 41 07 vv mm
+ * Set/clear flags vv=value, mm=mask (see RQ 08)
+ * 41 12 xx
+ * Used before the following configuration requests are issued
+ * (with xx=0x0f). I've seen other values<0xf, though.
+ * 41 01 xx xx
+ * Set baud rate. xxxx=ceil(0x384000/rate)=trunc(0x383fff/rate)+1.
+ * 41 03 ps bb
+ * Set byte size and parity. p: 0x20=even,0x10=odd,0x00=no parity
+ * [ 0x30: m, 0x40: s ]
+ * [s: 0: 1 stop bit; 1: 1.5; 2: 2]
+ * bb: bits/byte (seen 7 and 8)
+ * 41 13 -- -- -- -- 10 00 ww 00 00 00 xx 00 00 00 yy 00 00 00 zz 00 00 00
+ * ??
+ * Initialization: 01, 40, 00, 00
+ * Open device: 00 40, 00, 00
+ * yy and zz seem to be equal, either 0x00 or 0x0a
+ * (ww,xx) pairs seen: (00,00), (00,40), (01,40), (09,80), (19,80)
+ * 41 19 -- -- -- -- 06 00 00 00 00 xx 11 13
+ * Used after every "configuration sequence" (RQ 12, RQs 01/03/13).
+ * xx is usually 0x00 but was 0x7e before starting data transfer
+ * in unimodem mode. So, this might be an array of characters that need
+ * special treatment ("commit all bufferd data"?), 11=^Q, 13=^S.
+ *
+ * Unimodem mode: use "modprobe ppp_async flag_time=0" as the device _needs_ two
+ * flags per packet.
+ */
+
+static int gigaset_probe(struct usb_interface *interface,
+ const struct usb_device_id *id);
+static void gigaset_disconnect(struct usb_interface *interface);
+
+static struct gigaset_driver *driver = NULL;
+static struct cardstate *cardstate = NULL;
+
+/* usb specific object needed to register this driver with the usb subsystem */
+static struct usb_driver gigaset_usb_driver = {
+ .name = GIGASET_MODULENAME,
+ .probe = gigaset_probe,
+ .disconnect = gigaset_disconnect,
+ .id_table = gigaset_table,
+};
+
+struct usb_cardstate {
+ struct usb_device *udev; /* save off the usb device pointer */
+ struct usb_interface *interface; /* the interface for this device */
+ atomic_t busy; /* bulk output in progress */
+
+ /* Output buffer for commands (M105: and data)*/
+ unsigned char *bulk_out_buffer; /* the buffer to send data */
+ int bulk_out_size; /* the size of the send buffer */
+ __u8 bulk_out_endpointAddr; /* the address of the bulk out endpoint */
+ struct urb *bulk_out_urb; /* the urb used to transmit data */
+
+ /* Input buffer for command responses (M105: and data)*/
+ int rcvbuf_size; /* the size of the receive buffer */
+ struct urb *read_urb; /* the urb used to receive data */
+ __u8 int_in_endpointAddr; /* the address of the bulk in endpoint */
+
+ char bchars[6]; /* req. 0x19 */
+};
+
+struct usb_bc_state {};
+
+static inline unsigned tiocm_to_gigaset(unsigned state)
+{
+ return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
+}
+
+#ifdef CONFIG_GIGASET_UNDOCREQ
+/* WARNING: EXPERIMENTAL! */
+static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
+ unsigned new_state)
+{
+ unsigned mask, val;
+ int r;
+
+ mask = tiocm_to_gigaset(old_state ^ new_state);
+ val = tiocm_to_gigaset(new_state);
+
+ dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
+ r = usb_control_msg(cs->hw.usb->udev,
+ usb_sndctrlpipe(cs->hw.usb->udev, 0), 7, 0x41,
+ (val & 0xff) | ((mask & 0xff) << 8), 0,
+ NULL, 0, 2000 /*timeout??*/); // don't use this in an interrupt/BH
+ if (r < 0)
+ return r;
+ //..
+ return 0;
+}
+
+static int set_value(struct cardstate *cs, u8 req, u16 val)
+{
+ int r, r2;
+
+ dbg(DEBUG_USBREQ, "request %02x (%04x)", (unsigned)req, (unsigned)val);
+ r = usb_control_msg(cs->hw.usb->udev,
+ usb_sndctrlpipe(cs->hw.usb->udev, 0), 0x12, 0x41,
+ 0xf /*?*/, 0,
+ NULL, 0, 2000 /*?*/); /* no idea, what this does */
+ if (r < 0) {
+ err("error %d on request 0x12", -r);
+ return r;
+ }
+
+ r = usb_control_msg(cs->hw.usb->udev,
+ usb_sndctrlpipe(cs->hw.usb->udev, 0), req, 0x41,
+ val, 0,
+ NULL, 0, 2000 /*?*/);
+ if (r < 0)
+ err("error %d on request 0x%02x", -r, (unsigned)req);
+
+ r2 = usb_control_msg(cs->hw.usb->udev,
+ usb_sndctrlpipe(cs->hw.usb->udev, 0), 0x19, 0x41,
+ 0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
+ if (r2 < 0)
+ err("error %d on request 0x19", -r2);
+
+ return r < 0 ? r : (r2 < 0 ? r2 : 0);
+}
+
+/* WARNING: HIGHLY EXPERIMENTAL! */
+// don't use this in an interrupt/BH
+static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
+{
+ u16 val;
+ u32 rate;
+
+ cflag &= CBAUD;
+
+ switch (cflag) {
+ //FIXME more values?
+ case B300: rate = 300; break;
+ case B600: rate = 600; break;
+ case B1200: rate = 1200; break;
+ case B2400: rate = 2400; break;
+ case B4800: rate = 4800; break;
+ case B9600: rate = 9600; break;
+ case B19200: rate = 19200; break;
+ case B38400: rate = 38400; break;
+ case B57600: rate = 57600; break;
+ case B115200: rate = 115200; break;
+ default:
+ rate = 9600;
+ err("unsupported baudrate request 0x%x,"
+ " using default of B9600", cflag);
+ }
+
+ val = 0x383fff / rate + 1;
+
+ return set_value(cs, 1, val);
+}
+
+/* WARNING: HIGHLY EXPERIMENTAL! */
+// don't use this in an interrupt/BH
+static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
+{
+ u16 val = 0;
+
+ /* set the parity */
+ if (cflag & PARENB)
+ val |= (cflag & PARODD) ? 0x10 : 0x20;
+
+ /* set the number of data bits */
+ switch (cflag & CSIZE) {
+ case CS5:
+ val |= 5 << 8; break;
+ case CS6:
+ val |= 6 << 8; break;
+ case CS7:
+ val |= 7 << 8; break;
+ case CS8:
+ val |= 8 << 8; break;
+ default:
+ err("CSIZE was not CS5-CS8, using default of 8");
+ val |= 8 << 8;
+ break;
+ }
+
+ /* set the number of stop bits */
+ if (cflag & CSTOPB) {
+ if ((cflag & CSIZE) == CS5)
+ val |= 1; /* 1.5 stop bits */ //FIXME is this okay?
+ else
+ val |= 2; /* 2 stop bits */
+ }
+
+ return set_value(cs, 3, val);
+}
+
+#else
+static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
+ unsigned new_state)
+{
+ return -EINVAL;
+}
+
+static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
+{
+ return -EINVAL;
+}
+
+static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
+{
+ return -EINVAL;
+}
+#endif
+
+
+ /*================================================================================================================*/
+static int gigaset_init_bchannel(struct bc_state *bcs)
+{
+ /* nothing to do for M10x */
+ gigaset_bchannel_up(bcs);
+ return 0;
+}
+
+static int gigaset_close_bchannel(struct bc_state *bcs)
+{
+ /* nothing to do for M10x */
+ gigaset_bchannel_down(bcs);
+ return 0;
+}
+
+//void send_ack_to_LL(void *data);
+static int write_modem(struct cardstate *cs);
+static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
+
+
+/* Handling of send queue. If there is already a skb opened, put data to
+ * the transfer buffer by calling "write_modem". Otherwise take a new skb out of the queue.
+ * This function will be called by the ISR via "transmit_chars" (USB: B-Channel Bulk callback handler
+ * via immediate task queue) or by writebuf_from_LL if the LL wants to transmit data.
+ */
+static void gigaset_modem_fill(unsigned long data)
+{
+ struct cardstate *cs = (struct cardstate *) data;
+ struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
+ struct cmdbuf_t *cb;
+ unsigned long flags;
+ int again;
+
+ dbg(DEBUG_OUTPUT, "modem_fill");
+
+ if (atomic_read(&cs->hw.usb->busy)) {
+ dbg(DEBUG_OUTPUT, "modem_fill: busy");
+ return;
+ }
+
+ do {
+ again = 0;
+ if (!bcs->tx_skb) { /* no skb is being sent */
+ spin_lock_irqsave(&cs->cmdlock, flags);
+ cb = cs->cmdbuf;
+ spin_unlock_irqrestore(&cs->cmdlock, flags);
+ if (cb) { /* commands to send? */
+ dbg(DEBUG_OUTPUT, "modem_fill: cb");
+ if (send_cb(cs, cb) < 0) {
+ dbg(DEBUG_OUTPUT,
+ "modem_fill: send_cb failed");
+ again = 1; /* no callback will be called! */
+ }
+ } else { /* skbs to send? */
+ bcs->tx_skb = skb_dequeue(&bcs->squeue);
+ if (bcs->tx_skb)
+ dbg(DEBUG_INTR,
+ "Dequeued skb (Adr: %lx)!",
+ (unsigned long) bcs->tx_skb);
+ }
+ }
+
+ if (bcs->tx_skb) {
+ dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
+ if (write_modem(cs) < 0) {
+ dbg(DEBUG_OUTPUT,
+ "modem_fill: write_modem failed");
+ // FIXME should we tell the LL?
+ again = 1; /* no callback will be called! */
+ }
+ }
+ } while (again);
+}
+
+/**
+ * gigaset_read_int_callback
+ *
+ * It is called if the data was received from the device. This is almost similiar to
+ * the interrupt service routine in the serial device.
+ */
+static void gigaset_read_int_callback(struct urb *urb, struct pt_regs *regs)
+{
+ int resubmit = 0;
+ int r;
+ struct cardstate *cs;
+ unsigned numbytes;
+ unsigned char *src;
+ //unsigned long flags;
+ struct inbuf_t *inbuf;
+
+ IFNULLRET(urb);
+ inbuf = (struct inbuf_t *) urb->context;
+ IFNULLRET(inbuf);
+ //spin_lock_irqsave(&inbuf->lock, flags);
+ cs = inbuf->cs;
+ IFNULLGOTO(cs, exit);
+ IFNULLGOTO(cardstate, exit);
+
+ if (!atomic_read(&cs->connected)) {
+ err("%s: disconnected", __func__);
+ goto exit;
+ }
+
+ if (!urb->status) {
+ numbytes = urb->actual_length;
+
+ if (numbytes) {
+ src = inbuf->rcvbuf;
+ if (unlikely(*src))
+ warn("%s: There was no leading 0, but 0x%02x!",
+ __func__, (unsigned) *src);
+ ++src; /* skip leading 0x00 */
+ --numbytes;
+ if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
+ dbg(DEBUG_INTR, "%s-->BH", __func__);
+ gigaset_schedule_event(inbuf->cs);
+ }
+ } else
+ dbg(DEBUG_INTR, "Received zero block length");
+ resubmit = 1;
+ } else {
+ /* The urb might have been killed. */
+ dbg(DEBUG_ANY, "%s - nonzero read bulk status received: %d",
+ __func__, urb->status);
+ if (urb->status != -ENOENT) /* not killed */
+ resubmit = 1;
+ }
+exit:
+ //spin_unlock_irqrestore(&inbuf->lock, flags);
+ if (resubmit) {
+ r = usb_submit_urb(urb, SLAB_ATOMIC);
+ if (r)
+ err("error %d when resubmitting urb.", -r);
+ }
+}
+
+
+/* This callback routine is called when data was transmitted to a B-Channel.
+ * Therefore it has to check if there is still data to transmit. This
+ * happens by calling modem_fill via task queue.
+ *
+ */
+static void gigaset_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
+{
+ struct cardstate *cs = (struct cardstate *) urb->context;
+
+ IFNULLRET(cs);
+#ifdef CONFIG_GIGASET_DEBUG
+ if (!atomic_read(&cs->connected)) {
+ err("%s:not connected", __func__);
+ return;
+ }
+#endif
+ if (urb->status)
+ err("bulk transfer failed (status %d)", -urb->status); /* That's all we can do. Communication problems
+ are handeled by timeouts or network protocols */
+
+ atomic_set(&cs->hw.usb->busy, 0);
+ tasklet_schedule(&cs->write_tasklet);
+}
+
+static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
+{
+ struct cmdbuf_t *tcb;
+ unsigned long flags;
+ int count;
+ int status = -ENOENT; // FIXME
+ struct usb_cardstate *ucs = cs->hw.usb;
+
+ do {
+ if (!cb->len) {
+ tcb = cb;
+
+ spin_lock_irqsave(&cs->cmdlock, flags);
+ cs->cmdbytes -= cs->curlen;
+ dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
+ cs->curlen, cs->cmdbytes);
+ cs->cmdbuf = cb = cb->next;
+ if (cb) {
+ cb->prev = NULL;
+ cs->curlen = cb->len;
+ } else {
+ cs->lastcmdbuf = NULL;
+ cs->curlen = 0;
+ }
+ spin_unlock_irqrestore(&cs->cmdlock, flags);
+
+ if (tcb->wake_tasklet)
+ tasklet_schedule(tcb->wake_tasklet);
+ kfree(tcb);
+ }
+ if (cb) {
+ count = min(cb->len, ucs->bulk_out_size);
+ usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
+ usb_sndbulkpipe(ucs->udev,
+ ucs->bulk_out_endpointAddr & 0x0f),
+ cb->buf + cb->offset, count,
+ gigaset_write_bulk_callback, cs);
+
+ cb->offset += count;
+ cb->len -= count;
+ atomic_set(&ucs->busy, 1);
+ dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
+
+ status = usb_submit_urb(ucs->bulk_out_urb, SLAB_ATOMIC);
+ if (status) {
+ atomic_set(&ucs->busy, 0);
+ err("could not submit urb (error %d).",
+ -status);
+ cb->len = 0; /* skip urb => remove cb+wakeup in next loop cycle */
+ }
+ }
+ } while (cb && status); /* bei Fehler naechster Befehl //FIXME: ist das OK? */
+
+ return status;
+}
+
+/* Write string into transbuf and send it to modem.
+ */
+static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
+ int len, struct tasklet_struct *wake_tasklet)
+{
+ struct cmdbuf_t *cb;
+ unsigned long flags;
+
+ gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ?
+ DEBUG_TRANSCMD : DEBUG_LOCKCMD,
+ "CMD Transmit", len, buf, 0);
+
+ if (!atomic_read(&cs->connected)) {
+ err("%s: not connected", __func__);
+ return -ENODEV;
+ }
+
+ if (len <= 0)
+ return 0;
+
+ if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) {
+ err("%s: out of memory", __func__);
+ return -ENOMEM;
+ }
+
+ memcpy(cb->buf, buf, len);
+ cb->len = len;
+ cb->offset = 0;
+ cb->next = NULL;
+ cb->wake_tasklet = wake_tasklet;
+
+ spin_lock_irqsave(&cs->cmdlock, flags);
+ cb->prev = cs->lastcmdbuf;
+ if (cs->lastcmdbuf)
+ cs->lastcmdbuf->next = cb;
+ else {
+ cs->cmdbuf = cb;
+ cs->curlen = len;
+ }
+ cs->cmdbytes += len;
+ cs->lastcmdbuf = cb;
+ spin_unlock_irqrestore(&cs->cmdlock, flags);
+
+ tasklet_schedule(&cs->write_tasklet);
+ return len;
+}
+
+static int gigaset_write_room(struct cardstate *cs)
+{
+ unsigned long flags;
+ unsigned bytes;
+
+ spin_lock_irqsave(&cs->cmdlock, flags);
+ bytes = cs->cmdbytes;
+ spin_unlock_irqrestore(&cs->cmdlock, flags);
+
+ return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
+}
+
+static int gigaset_chars_in_buffer(struct cardstate *cs)
+{
+ return cs->cmdbytes;
+}
+
+static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
+{
+#ifdef CONFIG_GIGASET_UNDOCREQ
+ gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf, 0);
+ memcpy(cs->hw.usb->bchars, buf, 6);
+ return usb_control_msg(cs->hw.usb->udev,
+ usb_sndctrlpipe(cs->hw.usb->udev, 0), 0x19, 0x41,
+ 0, 0, &buf, 6, 2000);
+#else
+ return -EINVAL;
+#endif
+}
+
+static int gigaset_freebcshw(struct bc_state *bcs)
+{
+ if (!bcs->hw.usb)
+ return 0;
+ //FIXME
+ kfree(bcs->hw.usb);
+ return 1;
+}
+
+/* Initialize the b-channel structure */
+static int gigaset_initbcshw(struct bc_state *bcs)
+{
+ bcs->hw.usb = kmalloc(sizeof(struct usb_bc_state), GFP_KERNEL);
+ if (!bcs->hw.usb)
+ return 0;
+
+ //bcs->hw.usb->trans_flg = READY_TO_TRNSMIT; /* B-Channel ready to transmit */
+ return 1;
+}
+
+static void gigaset_reinitbcshw(struct bc_state *bcs)
+{
+}
+
+static void gigaset_freecshw(struct cardstate *cs)
+{
+ //FIXME
+ tasklet_kill(&cs->write_tasklet);
+ kfree(cs->hw.usb);
+}
+
+static int gigaset_initcshw(struct cardstate *cs)
+{
+ struct usb_cardstate *ucs;
+
+ cs->hw.usb = ucs =
+ kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
+ if (!ucs)
+ return 0;
+
+ ucs->bchars[0] = 0;
+ ucs->bchars[1] = 0;
+ ucs->bchars[2] = 0;
+ ucs->bchars[3] = 0;
+ ucs->bchars[4] = 0x11;
+ ucs->bchars[5] = 0x13;
+ ucs->bulk_out_buffer = NULL;
+ ucs->bulk_out_urb = NULL;
+ //ucs->urb_cmd_out = NULL;
+ ucs->read_urb = NULL;
+ tasklet_init(&cs->write_tasklet,
+ &gigaset_modem_fill, (unsigned long) cs);
+
+ return 1;
+}
+
+/* Writes the data of the current open skb into the modem.
+ * We have to protect against multiple calls until the
+ * callback handler () is called , due to the fact that we
+ * are just allowed to send data once to an endpoint. Therefore
+ * we using "trans_flg" to synchonize ...
+ */
+static int write_modem(struct cardstate *cs)
+{
+ int ret;
+ int count;
+ struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
+ struct usb_cardstate *ucs = cs->hw.usb;
+ //unsigned long flags;
+
+ IFNULLRETVAL(bcs->tx_skb, -EINVAL);
+
+ dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
+
+ ret = -ENODEV;
+ IFNULLGOTO(ucs->bulk_out_buffer, error);
+ IFNULLGOTO(ucs->bulk_out_urb, error);
+ ret = 0;
+
+ if (!bcs->tx_skb->len) {
+ dev_kfree_skb_any(bcs->tx_skb);
+ bcs->tx_skb = NULL;
+ return -EINVAL;
+ }
+
+ /* Copy data to bulk out buffer and // FIXME copying not necessary
+ * transmit data
+ */
+ count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
+ memcpy(ucs->bulk_out_buffer, bcs->tx_skb->data, count);
+ skb_pull(bcs->tx_skb, count);
+
+ usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
+ usb_sndbulkpipe(ucs->udev,
+ ucs->bulk_out_endpointAddr & 0x0f),
+ ucs->bulk_out_buffer, count,
+ gigaset_write_bulk_callback, cs);
+ atomic_set(&ucs->busy, 1);
+ dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
+
+ ret = usb_submit_urb(ucs->bulk_out_urb, SLAB_ATOMIC);
+ if (ret) {
+ err("could not submit urb (error %d).", -ret);
+ atomic_set(&ucs->busy, 0);
+ }
+ if (!bcs->tx_skb->len) {
+ /* skb sent completely */
+ gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
+
+ dbg(DEBUG_INTR,
+ "kfree skb (Adr: %lx)!", (unsigned long) bcs->tx_skb);
+ dev_kfree_skb_any(bcs->tx_skb);
+ bcs->tx_skb = NULL;
+ }
+
+ return ret;
+error:
+ dev_kfree_skb_any(bcs->tx_skb);
+ bcs->tx_skb = NULL;
+ return ret;
+
+}
+
+static int gigaset_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
+{
+ int retval;
+ struct usb_device *udev = interface_to_usbdev(interface);
+ unsigned int ifnum;
+ struct usb_host_interface *hostif;
+ struct cardstate *cs = NULL;
+ struct usb_cardstate *ucs = NULL;
+ //struct usb_interface_descriptor *iface_desc;
+ struct usb_endpoint_descriptor *endpoint;
+ //isdn_ctrl command;
+ int buffer_size;
+ int alt;
+ //unsigned long flags;
+
+ info("%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
+ __func__, le16_to_cpu(udev->descriptor.idVendor),
+ le16_to_cpu(udev->descriptor.idProduct));
+
+ retval = -ENODEV; //FIXME
+
+ /* See if the device offered us matches what we can accept */
+ if ((le16_to_cpu(udev->descriptor.idVendor != USB_M105_VENDOR_ID)) ||
+ (le16_to_cpu(udev->descriptor.idProduct != USB_M105_PRODUCT_ID)))
+ return -ENODEV;
+
+ /* this starts to become ascii art... */
+ hostif = interface->cur_altsetting;
+ alt = hostif->desc.bAlternateSetting;
+ ifnum = hostif->desc.bInterfaceNumber; // FIXME ?
+
+ if (alt != 0 || ifnum != 0) {
+ warn("ifnum %d, alt %d", ifnum, alt);
+ return -ENODEV;
+ }
+
+ /* Reject application specific intefaces
+ *
+ */
+ if (hostif->desc.bInterfaceClass != 255) {
+ info("%s: Device matched, but iface_desc[%d]->bInterfaceClass==%d !",
+ __func__, ifnum, hostif->desc.bInterfaceClass);
+ return -ENODEV;
+ }
+
+ info("%s: Device matched ... !", __func__);
+
+ cs = gigaset_getunassignedcs(driver);
+ if (!cs) {
+ warn("No free cardstate!");
+ return -ENODEV;
+ }
+ ucs = cs->hw.usb;
+
+#if 0
+ if (usb_set_configuration(udev, udev->config[0].desc.bConfigurationValue) < 0) {
+ warn("set_configuration failed");
+ goto error;
+ }
+
+
+ if (usb_set_interface(udev, ifnum/*==0*/, alt/*==0*/) < 0) {
+ warn("usb_set_interface failed, device %d interface %d altsetting %d",
+ udev->devnum, ifnum, alt);
+ goto error;
+ }
+#endif
+
+ /* set up the endpoint information */
+ /* check out the endpoints */
+ /* We will get 2 endpoints: One for sending commands to the device (bulk out) and one to
+ * poll messages from the device(int in).
+ * Therefore we will have an almost similiar situation as with our serial port handler.
+ * If an connection will be established, we will have to create data in/out pipes
+ * dynamically...
+ */
+
+ endpoint = &hostif->endpoint[0].desc;
+
+ buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+ ucs->bulk_out_size = buffer_size;
+ ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
+ ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
+ if (!ucs->bulk_out_buffer) {
+ err("Couldn't allocate bulk_out_buffer");
+ retval = -ENOMEM;
+ goto error;
+ }
+
+ ucs->bulk_out_urb = usb_alloc_urb(0, SLAB_KERNEL);
+ if (!ucs->bulk_out_urb) {
+ err("Couldn't allocate bulk_out_buffer");
+ retval = -ENOMEM;
+ goto error;
+ }
+
+ endpoint = &hostif->endpoint[1].desc;
+
+ atomic_set(&ucs->busy, 0);
+ ucs->udev = udev;
+ ucs->interface = interface;
+
+ ucs->read_urb = usb_alloc_urb(0, SLAB_KERNEL);
+ if (!ucs->read_urb) {
+ err("No free urbs available");
+ retval = -ENOMEM;
+ goto error;
+ }
+ buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+ ucs->rcvbuf_size = buffer_size;
+ ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
+ cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
+ if (!cs->inbuf[0].rcvbuf) {
+ err("Couldn't allocate rcvbuf");
+ retval = -ENOMEM;
+ goto error;
+ }
+ /* Fill the interrupt urb and send it to the core */
+ usb_fill_int_urb(ucs->read_urb, udev,
+ usb_rcvintpipe(udev,
+ endpoint->bEndpointAddress & 0x0f),
+ cs->inbuf[0].rcvbuf, buffer_size,
+ gigaset_read_int_callback,
+ cs->inbuf + 0, endpoint->bInterval);
+
+ retval = usb_submit_urb(ucs->read_urb, SLAB_KERNEL);
+ if (retval) {
+ err("Could not submit URB!");
+ goto error;
+ }
+
+ /* tell common part that the device is ready */
+ if (startmode == SM_LOCKED)
+ atomic_set(&cs->mstate, MS_LOCKED);
+ if (!gigaset_start(cs)) {
+ tasklet_kill(&cs->write_tasklet);
+ retval = -ENODEV; //FIXME
+ goto error;
+ }
+
+ /* save address of controller structure */
+ usb_set_intfdata(interface, cs);
+
+ /* set up device sysfs */
+ gigaset_init_dev_sysfs(interface);
+ return 0;
+
+error:
+ if (ucs->read_urb)
+ usb_kill_urb(ucs->read_urb);
+ kfree(ucs->bulk_out_buffer);
+ if (ucs->bulk_out_urb != NULL)
+ usb_free_urb(ucs->bulk_out_urb);
+ kfree(cs->inbuf[0].rcvbuf);
+ if (ucs->read_urb != NULL)
+ usb_free_urb(ucs->read_urb);
+ ucs->read_urb = ucs->bulk_out_urb = NULL;
+ cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
+ gigaset_unassign(cs);
+ return retval;
+}
+
+/**
+ * skel_disconnect
+ */
+static void gigaset_disconnect(struct usb_interface *interface)
+{
+ struct cardstate *cs;
+ struct usb_cardstate *ucs;
+
+ cs = usb_get_intfdata(interface);
+
+ /* clear device sysfs */
+ gigaset_free_dev_sysfs(interface);
+
+ usb_set_intfdata(interface, NULL);
+ ucs = cs->hw.usb;
+ usb_kill_urb(ucs->read_urb);
+ //info("GigaSet USB device #%d will be disconnected", minor);
+
+ gigaset_stop(cs);
+
+ tasklet_kill(&cs->write_tasklet);
+
+ usb_kill_urb(ucs->bulk_out_urb); /* FIXME: nur, wenn noetig */
+ //usb_kill_urb(ucs->urb_cmd_out); /* FIXME: nur, wenn noetig */
+
+ kfree(ucs->bulk_out_buffer);
+ if (ucs->bulk_out_urb != NULL)
+ usb_free_urb(ucs->bulk_out_urb);
+ //if(ucs->urb_cmd_out != NULL)
+ // usb_free_urb(ucs->urb_cmd_out);
+ kfree(cs->inbuf[0].rcvbuf);
+ if (ucs->read_urb != NULL)
+ usb_free_urb(ucs->read_urb);
+ ucs->read_urb = ucs->bulk_out_urb/*=ucs->urb_cmd_out*/=NULL;
+ cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
+
+ gigaset_unassign(cs);
+}
+
+static struct gigaset_ops ops = {
+ gigaset_write_cmd,
+ gigaset_write_room,
+ gigaset_chars_in_buffer,
+ gigaset_brkchars,
+ gigaset_init_bchannel,
+ gigaset_close_bchannel,
+ gigaset_initbcshw,
+ gigaset_freebcshw,
+ gigaset_reinitbcshw,
+ gigaset_initcshw,
+ gigaset_freecshw,
+ gigaset_set_modem_ctrl,
+ gigaset_baud_rate,
+ gigaset_set_line_ctrl,
+ gigaset_m10x_send_skb,
+ gigaset_m10x_input,
+};
+
+/**
+ * usb_gigaset_init
+ * This function is called while kernel-module is loaded
+ */
+static int __init usb_gigaset_init(void)
+{
+ int result;
+
+ /* allocate memory for our driver state and intialize it */
+ if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
+ GIGASET_MODULENAME, GIGASET_DEVNAME,
+ GIGASET_DEVFSNAME, &ops,
+ THIS_MODULE)) == NULL)
+ goto error;
+
+ /* allocate memory for our device state and intialize it */
+ cardstate = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
+ if (!cardstate)
+ goto error;
+
+ /* register this driver with the USB subsystem */
+ result = usb_register(&gigaset_usb_driver);
+ if (result < 0) {
+ err("usb_gigaset: usb_register failed (error %d)",
+ -result);
+ goto error;
+ }
+
+ info(DRIVER_AUTHOR);
+ info(DRIVER_DESC);
+ return 0;
+
+error: if (cardstate)
+ gigaset_freecs(cardstate);
+ cardstate = NULL;
+ if (driver)
+ gigaset_freedriver(driver);
+ driver = NULL;
+ return -1;
+}
+
+
+/**
+ * usb_gigaset_exit
+ * This function is called while unloading the kernel-module
+ */
+static void __exit usb_gigaset_exit(void)
+{
+ gigaset_blockdriver(driver); /* => probe will fail
+ * => no gigaset_start any more
+ */
+
+ gigaset_shutdown(cardstate);
+ /* from now on, no isdn callback should be possible */
+
+ /* deregister this driver with the USB subsystem */
+ usb_deregister(&gigaset_usb_driver);
+ /* this will call the disconnect-callback */
+ /* from now on, no disconnect/probe callback should be running */
+
+ gigaset_freecs(cardstate);
+ cardstate = NULL;
+ gigaset_freedriver(driver);
+ driver = NULL;
+}
+
+
+module_init(usb_gigaset_init);
+module_exit(usb_gigaset_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+
+MODULE_LICENSE("GPL");