diff options
Diffstat (limited to 'drivers/isdn/gigaset/bas-gigaset.c')
| -rw-r--r-- | drivers/isdn/gigaset/bas-gigaset.c | 423 |
1 files changed, 296 insertions, 127 deletions
diff --git a/drivers/isdn/gigaset/bas-gigaset.c b/drivers/isdn/gigaset/bas-gigaset.c index af7648274b38..5255b5e20e13 100644 --- a/drivers/isdn/gigaset/bas-gigaset.c +++ b/drivers/isdn/gigaset/bas-gigaset.c @@ -73,6 +73,14 @@ static int gigaset_probe(struct usb_interface *interface, /* Function will be called if the device is unplugged */ static void gigaset_disconnect(struct usb_interface *interface); +/* functions called before/after suspend */ +static int gigaset_suspend(struct usb_interface *intf, pm_message_t message); +static int gigaset_resume(struct usb_interface *intf); + +/* functions called before/after device reset */ +static int gigaset_pre_reset(struct usb_interface *intf); +static int gigaset_post_reset(struct usb_interface *intf); + static int atread_submit(struct cardstate *, int); static void stopurbs(struct bas_bc_state *); static int req_submit(struct bc_state *, int, int, int); @@ -105,8 +113,9 @@ struct bas_cardstate { unsigned char int_in_buf[3]; spinlock_t lock; /* locks all following */ - atomic_t basstate; /* bitmap (BS_*) */ + int basstate; /* bitmap (BS_*) */ int pending; /* uncompleted base request */ + wait_queue_head_t waitqueue; int rcvbuf_size; /* size of AT receive buffer */ /* 0: no receive in progress */ int retry_cmd_in; /* receive req retry count */ @@ -121,10 +130,10 @@ struct bas_cardstate { #define BS_ATTIMER 0x020 /* waiting for HD_READY_SEND_ATDATA */ #define BS_ATRDPEND 0x040 /* urb_cmd_in in use */ #define BS_ATWRPEND 0x080 /* urb_cmd_out in use */ +#define BS_SUSPEND 0x100 /* USB port suspended */ 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 = { @@ -132,6 +141,11 @@ static struct usb_driver gigaset_usb_driver = { .probe = gigaset_probe, .disconnect = gigaset_disconnect, .id_table = gigaset_table, + .suspend = gigaset_suspend, + .resume = gigaset_resume, + .reset_resume = gigaset_post_reset, + .pre_reset = gigaset_pre_reset, + .post_reset = gigaset_post_reset, }; /* get message text for usb_submit_urb return code @@ -248,12 +262,12 @@ static inline void dump_urb(enum debuglevel level, const char *tag, if (urb) { gig_dbg(level, " dev=0x%08lx, pipe=%s:EP%d/DV%d:%s, " - "status=%d, hcpriv=0x%08lx, transfer_flags=0x%x,", + "hcpriv=0x%08lx, transfer_flags=0x%x,", (unsigned long) urb->dev, usb_pipetype_str(urb->pipe), usb_pipeendpoint(urb->pipe), usb_pipedevice(urb->pipe), usb_pipein(urb->pipe) ? "in" : "out", - urb->status, (unsigned long) urb->hcpriv, + (unsigned long) urb->hcpriv, urb->transfer_flags); gig_dbg(level, " transfer_buffer=0x%08lx[%d], actual_length=%d, " @@ -355,27 +369,27 @@ static void check_pending(struct bas_cardstate *ucs) case 0: break; case HD_OPEN_ATCHANNEL: - if (atomic_read(&ucs->basstate) & BS_ATOPEN) + if (ucs->basstate & BS_ATOPEN) ucs->pending = 0; break; case HD_OPEN_B1CHANNEL: - if (atomic_read(&ucs->basstate) & BS_B1OPEN) + if (ucs->basstate & BS_B1OPEN) ucs->pending = 0; break; case HD_OPEN_B2CHANNEL: - if (atomic_read(&ucs->basstate) & BS_B2OPEN) + if (ucs->basstate & BS_B2OPEN) ucs->pending = 0; break; case HD_CLOSE_ATCHANNEL: - if (!(atomic_read(&ucs->basstate) & BS_ATOPEN)) + if (!(ucs->basstate & BS_ATOPEN)) ucs->pending = 0; break; case HD_CLOSE_B1CHANNEL: - if (!(atomic_read(&ucs->basstate) & BS_B1OPEN)) + if (!(ucs->basstate & BS_B1OPEN)) ucs->pending = 0; break; case HD_CLOSE_B2CHANNEL: - if (!(atomic_read(&ucs->basstate) & BS_B2OPEN)) + if (!(ucs->basstate & BS_B2OPEN)) ucs->pending = 0; break; case HD_DEVICE_INIT_ACK: /* no reply expected */ @@ -441,8 +455,8 @@ inline static int update_basstate(struct bas_cardstate *ucs, int state; spin_lock_irqsave(&ucs->lock, flags); - state = atomic_read(&ucs->basstate); - atomic_set(&ucs->basstate, (state & ~clear) | set); + state = ucs->basstate; + ucs->basstate = (state & ~clear) | set; spin_unlock_irqrestore(&ucs->lock, flags); return state; } @@ -459,11 +473,13 @@ static void read_ctrl_callback(struct urb *urb) struct inbuf_t *inbuf = urb->context; struct cardstate *cs = inbuf->cs; struct bas_cardstate *ucs = cs->hw.bas; + int status = urb->status; int have_data = 0; unsigned numbytes; int rc; update_basstate(ucs, 0, BS_ATRDPEND); + wake_up(&ucs->waitqueue); if (!ucs->rcvbuf_size) { dev_warn(cs->dev, "%s: no receive in progress\n", __func__); @@ -472,7 +488,7 @@ static void read_ctrl_callback(struct urb *urb) del_timer(&ucs->timer_cmd_in); - switch (urb->status) { + switch (status) { case 0: /* normal completion */ numbytes = urb->actual_length; if (unlikely(numbytes != ucs->rcvbuf_size)) { @@ -506,12 +522,12 @@ static void read_ctrl_callback(struct urb *urb) case -ESHUTDOWN: /* device shut down */ /* no action necessary */ gig_dbg(DEBUG_USBREQ, "%s: %s", - __func__, get_usb_statmsg(urb->status)); + __func__, get_usb_statmsg(status)); break; default: /* severe trouble */ dev_warn(cs->dev, "control read: %s\n", - get_usb_statmsg(urb->status)); + get_usb_statmsg(status)); if (ucs->retry_cmd_in++ < BAS_RETRY) { dev_notice(cs->dev, "control read: retry %d\n", ucs->retry_cmd_in); @@ -550,17 +566,28 @@ static void read_ctrl_callback(struct urb *urb) static int atread_submit(struct cardstate *cs, int timeout) { struct bas_cardstate *ucs = cs->hw.bas; + int basstate; int ret; gig_dbg(DEBUG_USBREQ, "-------> HD_READ_ATMESSAGE (%d)", ucs->rcvbuf_size); - if (update_basstate(ucs, BS_ATRDPEND, 0) & BS_ATRDPEND) { + basstate = update_basstate(ucs, BS_ATRDPEND, 0); + if (basstate & BS_ATRDPEND) { dev_err(cs->dev, "could not submit HD_READ_ATMESSAGE: URB busy\n"); return -EBUSY; } + if (basstate & BS_SUSPEND) { + dev_notice(cs->dev, + "HD_READ_ATMESSAGE not submitted, " + "suspend in progress\n"); + update_basstate(ucs, 0, BS_ATRDPEND); + /* treat like disconnect */ + return -ENODEV; + } + ucs->dr_cmd_in.bRequestType = IN_VENDOR_REQ; ucs->dr_cmd_in.bRequest = HD_READ_ATMESSAGE; ucs->dr_cmd_in.wValue = 0; @@ -601,12 +628,13 @@ static void read_int_callback(struct urb *urb) struct cardstate *cs = urb->context; struct bas_cardstate *ucs = cs->hw.bas; struct bc_state *bcs; + int status = urb->status; unsigned long flags; int rc; unsigned l; int channel; - switch (urb->status) { + switch (status) { case 0: /* success */ break; case -ENOENT: /* cancelled */ @@ -614,7 +642,7 @@ static void read_int_callback(struct urb *urb) case -EINPROGRESS: /* pending */ /* ignore silently */ gig_dbg(DEBUG_USBREQ, "%s: %s", - __func__, get_usb_statmsg(urb->status)); + __func__, get_usb_statmsg(status)); return; case -ENODEV: /* device removed */ case -ESHUTDOWN: /* device shut down */ @@ -623,7 +651,7 @@ static void read_int_callback(struct urb *urb) return; default: /* severe trouble */ dev_warn(cs->dev, "interrupt read: %s\n", - get_usb_statmsg(urb->status)); + get_usb_statmsg(status)); //FIXME corrective action? resubmission always ok? goto resubmit; } @@ -745,6 +773,7 @@ static void read_int_callback(struct urb *urb) } check_pending(ucs); + wake_up(&ucs->waitqueue); resubmit: rc = usb_submit_urb(urb, GFP_ATOMIC); @@ -766,17 +795,18 @@ static void read_iso_callback(struct urb *urb) { struct bc_state *bcs; struct bas_bc_state *ubc; + int status = urb->status; unsigned long flags; int i, rc; /* status codes not worth bothering the tasklet with */ - if (unlikely(urb->status == -ENOENT || - urb->status == -ECONNRESET || - urb->status == -EINPROGRESS || - urb->status == -ENODEV || - urb->status == -ESHUTDOWN)) { + if (unlikely(status == -ENOENT || + status == -ECONNRESET || + status == -EINPROGRESS || + status == -ENODEV || + status == -ESHUTDOWN)) { gig_dbg(DEBUG_ISO, "%s: %s", - __func__, get_usb_statmsg(urb->status)); + __func__, get_usb_statmsg(status)); return; } @@ -787,10 +817,11 @@ static void read_iso_callback(struct urb *urb) if (likely(ubc->isoindone == NULL)) { /* pass URB to tasklet */ ubc->isoindone = urb; + ubc->isoinstatus = status; tasklet_schedule(&ubc->rcvd_tasklet); } else { /* tasklet still busy, drop data and resubmit URB */ - ubc->loststatus = urb->status; + ubc->loststatus = status; for (i = 0; i < BAS_NUMFRAMES; i++) { ubc->isoinlost += urb->iso_frame_desc[i].actual_length; if (unlikely(urb->iso_frame_desc[i].status != 0 && @@ -800,7 +831,7 @@ static void read_iso_callback(struct urb *urb) urb->iso_frame_desc[i].status = 0; urb->iso_frame_desc[i].actual_length = 0; } - if (likely(atomic_read(&ubc->running))) { + if (likely(ubc->running)) { /* urb->dev is clobbered by USB subsystem */ urb->dev = bcs->cs->hw.bas->udev; urb->transfer_flags = URB_ISO_ASAP; @@ -831,22 +862,24 @@ static void write_iso_callback(struct urb *urb) { struct isow_urbctx_t *ucx; struct bas_bc_state *ubc; + int status = urb->status; unsigned long flags; /* status codes not worth bothering the tasklet with */ - if (unlikely(urb->status == -ENOENT || - urb->status == -ECONNRESET || - urb->status == -EINPROGRESS || - urb->status == -ENODEV || - urb->status == -ESHUTDOWN)) { + if (unlikely(status == -ENOENT || + status == -ECONNRESET || + status == -EINPROGRESS || + status == -ENODEV || + status == -ESHUTDOWN)) { gig_dbg(DEBUG_ISO, "%s: %s", - __func__, get_usb_statmsg(urb->status)); + __func__, get_usb_statmsg(status)); return; } /* pass URB context to tasklet */ ucx = urb->context; ubc = ucx->bcs->hw.bas; + ucx->status = status; spin_lock_irqsave(&ubc->isooutlock, flags); ubc->isooutovfl = ubc->isooutdone; @@ -875,7 +908,7 @@ static int starturbs(struct bc_state *bcs) bcs->inputstate |= INS_flag_hunt; /* submit all isochronous input URBs */ - atomic_set(&ubc->running, 1); + ubc->running = 1; for (k = 0; k < BAS_INURBS; k++) { urb = ubc->isoinurbs[k]; if (!urb) { @@ -932,15 +965,15 @@ static int starturbs(struct bc_state *bcs) ubc->isoouturbs[k].limit = -1; } - /* submit two URBs, keep third one */ - for (k = 0; k < 2; ++k) { + /* keep one URB free, submit the others */ + for (k = 0; k < BAS_OUTURBS-1; ++k) { dump_urb(DEBUG_ISO, "Initial isoc write", urb); rc = usb_submit_urb(ubc->isoouturbs[k].urb, GFP_ATOMIC); if (rc != 0) goto error; } dump_urb(DEBUG_ISO, "Initial isoc write (free)", urb); - ubc->isooutfree = &ubc->isoouturbs[2]; + ubc->isooutfree = &ubc->isoouturbs[BAS_OUTURBS-1]; ubc->isooutdone = ubc->isooutovfl = NULL; return 0; error: @@ -958,7 +991,7 @@ static void stopurbs(struct bas_bc_state *ubc) { int k, rc; - atomic_set(&ubc->running, 0); + ubc->running = 0; for (k = 0; k < BAS_INURBS; ++k) { rc = usb_unlink_urb(ubc->isoinurbs[k]); @@ -1034,7 +1067,7 @@ static int submit_iso_write_urb(struct isow_urbctx_t *ucx) } break; } - ucx->limit = atomic_read(&ubc->isooutbuf->nextread); + ucx->limit = ubc->isooutbuf->nextread; ifd->status = 0; ifd->actual_length = 0; } @@ -1070,6 +1103,7 @@ static void write_iso_tasklet(unsigned long data) struct cardstate *cs = bcs->cs; struct isow_urbctx_t *done, *next, *ovfl; struct urb *urb; + int status; struct usb_iso_packet_descriptor *ifd; int offset; unsigned long flags; @@ -1080,7 +1114,7 @@ static void write_iso_tasklet(unsigned long data) /* loop while completed URBs arrive in time */ for (;;) { - if (unlikely(!(atomic_read(&ubc->running)))) { + if (unlikely(!(ubc->running))) { gig_dbg(DEBUG_ISO, "%s: not running", __func__); return; } @@ -1126,7 +1160,8 @@ static void write_iso_tasklet(unsigned long data) /* process completed URB */ urb = done->urb; - switch (urb->status) { + status = done->status; + switch (status) { case -EXDEV: /* partial completion */ gig_dbg(DEBUG_ISO, "%s: URB partially completed", __func__); @@ -1179,12 +1214,12 @@ static void write_iso_tasklet(unsigned long data) break; default: /* severe trouble */ dev_warn(cs->dev, "isochronous write: %s\n", - get_usb_statmsg(urb->status)); + get_usb_statmsg(status)); } /* mark the write buffer area covered by this URB as free */ if (done->limit >= 0) - atomic_set(&ubc->isooutbuf->read, done->limit); + ubc->isooutbuf->read = done->limit; /* mark URB as free */ spin_lock_irqsave(&ubc->isooutlock, flags); @@ -1233,6 +1268,7 @@ static void read_iso_tasklet(unsigned long data) struct bas_bc_state *ubc = bcs->hw.bas; struct cardstate *cs = bcs->cs; struct urb *urb; + int status; char *rcvbuf; unsigned long flags; int totleft, numbytes, offset, frame, rc; @@ -1245,6 +1281,7 @@ static void read_iso_tasklet(unsigned long data) spin_unlock_irqrestore(&ubc->isoinlock, flags); return; } + status = ubc->isoinstatus; ubc->isoindone = NULL; if (unlikely(ubc->loststatus != -EINPROGRESS)) { dev_warn(cs->dev, @@ -1256,15 +1293,15 @@ static void read_iso_tasklet(unsigned long data) } spin_unlock_irqrestore(&ubc->isoinlock, flags); - if (unlikely(!(atomic_read(&ubc->running)))) { + if (unlikely(!(ubc->running))) { gig_dbg(DEBUG_ISO, "%s: channel not running, " "dropped URB with status: %s", - __func__, get_usb_statmsg(urb->status)); + __func__, get_usb_statmsg(status)); return; } - switch (urb->status) { + switch (status) { case 0: /* normal completion */ break; case -EXDEV: /* inspect individual frames @@ -1276,7 +1313,7 @@ static void read_iso_tasklet(unsigned long data) case -ECONNRESET: case -EINPROGRESS: gig_dbg(DEBUG_ISO, "%s: %s", - __func__, get_usb_statmsg(urb->status)); + __func__, get_usb_statmsg(status)); continue; /* -> skip */ case -EPIPE: dev_err(cs->dev, "isochronous read stalled\n"); @@ -1284,7 +1321,7 @@ static void read_iso_tasklet(unsigned long data) continue; /* -> skip */ default: /* severe trouble */ dev_warn(cs->dev, "isochronous read: %s\n", - get_usb_statmsg(urb->status)); + get_usb_statmsg(status)); goto error; } @@ -1406,6 +1443,8 @@ static void req_timeout(unsigned long data) dev_warn(bcs->cs->dev, "request 0x%02x timed out, clearing\n", pending); } + + wake_up(&ucs->waitqueue); } /* write_ctrl_callback @@ -1418,11 +1457,12 @@ static void req_timeout(unsigned long data) static void write_ctrl_callback(struct urb *urb) { struct bas_cardstate *ucs = urb->context; + int status = urb->status; int rc; unsigned long flags; /* check status */ - switch (urb->status) { + switch (status) { case 0: /* normal completion */ spin_lock_irqsave(&ucs->lock, flags); switch (ucs->pending) { @@ -1441,20 +1481,22 @@ static void write_ctrl_callback(struct urb *urb) case -ESHUTDOWN: /* device shut down */ /* ignore silently */ gig_dbg(DEBUG_USBREQ, "%s: %s", - __func__, get_usb_statmsg(urb->status)); + __func__, get_usb_statmsg(status)); break; default: /* any failure */ - if (++ucs->retry_ctrl > BAS_RETRY) { + /* don't retry if suspend requested */ + if (++ucs->retry_ctrl > BAS_RETRY || + (ucs->basstate & BS_SUSPEND)) { dev_err(&ucs->interface->dev, "control request 0x%02x failed: %s\n", ucs->dr_ctrl.bRequest, - get_usb_statmsg(urb->status)); + get_usb_statmsg(status)); break; /* give up */ } dev_notice(&ucs->interface->dev, "control request 0x%02x: %s, retry %d\n", - ucs->dr_ctrl.bRequest, get_usb_statmsg(urb->status), + ucs->dr_ctrl.bRequest, get_usb_statmsg(status), ucs->retry_ctrl); /* urb->dev is clobbered by USB subsystem */ urb->dev = ucs->udev; @@ -1474,6 +1516,7 @@ static void write_ctrl_callback(struct urb *urb) del_timer(&ucs->timer_ctrl); ucs->pending = 0; spin_unlock_irqrestore(&ucs->lock, flags); + wake_up(&ucs->waitqueue); } /* req_submit @@ -1548,37 +1591,46 @@ static int req_submit(struct bc_state *bcs, int req, int val, int timeout) */ static int gigaset_init_bchannel(struct bc_state *bcs) { + struct cardstate *cs = bcs->cs; int req, ret; unsigned long flags; - spin_lock_irqsave(&bcs->cs->lock, flags); - if (unlikely(!bcs->cs->connected)) { + spin_lock_irqsave(&cs->lock, flags); + if (unlikely(!cs->connected)) { gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__); - spin_unlock_irqrestore(&bcs->cs->lock, flags); + spin_unlock_irqrestore(&cs->lock, flags); return -ENODEV; } + if (cs->hw.bas->basstate & BS_SUSPEND) { + dev_notice(cs->dev, + "not starting isochronous I/O, " + "suspend in progress\n"); + spin_unlock_irqrestore(&cs->lock, flags); + return -EHOSTUNREACH; + } + if ((ret = starturbs(bcs)) < 0) { - dev_err(bcs->cs->dev, + dev_err(cs->dev, "could not start isochronous I/O for channel B%d: %s\n", bcs->channel + 1, ret == -EFAULT ? "null URB" : get_usb_rcmsg(ret)); if (ret != -ENODEV) error_hangup(bcs); - spin_unlock_irqrestore(&bcs->cs->lock, flags); + spin_unlock_irqrestore(&cs->lock, flags); return ret; } req = bcs->channel ? HD_OPEN_B2CHANNEL : HD_OPEN_B1CHANNEL; if ((ret = req_submit(bcs, req, 0, BAS_TIMEOUT)) < 0) { - dev_err(bcs->cs->dev, "could not open channel B%d\n", + dev_err(cs->dev, "could not open channel B%d\n", bcs->channel + 1); stopurbs(bcs->hw.bas); if (ret != -ENODEV) error_hangup(bcs); } - spin_unlock_irqrestore(&bcs->cs->lock, flags); + spin_unlock_irqrestore(&cs->lock, flags); return ret; } @@ -1594,20 +1646,20 @@ static int gigaset_init_bchannel(struct bc_state *bcs) */ static int gigaset_close_bchannel(struct bc_state *bcs) { + struct cardstate *cs = bcs->cs; int req, ret; unsigned long flags; - spin_lock_irqsave(&bcs->cs->lock, flags); - if (unlikely(!bcs->cs->connected)) { - spin_unlock_irqrestore(&bcs->cs->lock, flags); + spin_lock_irqsave(&cs->lock, flags); + if (unlikely(!cs->connected)) { + spin_unlock_irqrestore(&cs->lock, flags); gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__); return -ENODEV; } - if (!(atomic_read(&bcs->cs->hw.bas->basstate) & - (bcs->channel ? BS_B2OPEN : BS_B1OPEN))) { + if (!(cs->hw.bas->basstate & (bcs->channel ? BS_B2OPEN : BS_B1OPEN))) { /* channel not running: just signal common.c */ - spin_unlock_irqrestore(&bcs->cs->lock, flags); + spin_unlock_irqrestore(&cs->lock, flags); gigaset_bchannel_down(bcs); return 0; } @@ -1615,10 +1667,10 @@ static int gigaset_close_bchannel(struct bc_state *bcs) /* channel running: tell device to close it */ req = bcs->channel ? HD_CLOSE_B2CHANNEL : HD_CLOSE_B1CHANNEL; if ((ret = req_submit(bcs, req, 0, BAS_TIMEOUT)) < 0) - dev_err(bcs->cs->dev, "closing channel B%d failed\n", + dev_err(cs->dev, "closing channel B%d failed\n", bcs->channel + 1); - spin_unlock_irqrestore(&bcs->cs->lock, flags); + spin_unlock_irqrestore(&cs->lock, flags); return ret; } @@ -1665,12 +1717,14 @@ static void write_command_callback(struct urb *urb) { struct cardstate *cs = urb->context; struct bas_cardstate *ucs = cs->hw.bas; + int status = urb->status; unsigned long flags; update_basstate(ucs, 0, BS_ATWRPEND); + wake_up(&ucs->waitqueue); /* check status */ - switch (urb->status) { + switch (status) { case 0: /* normal completion */ break; case -ENOENT: /* cancelled */ @@ -1680,26 +1734,33 @@ static void write_command_callback(struct urb *urb) case -ESHUTDOWN: /* device shut down */ /* ignore silently */ gig_dbg(DEBUG_USBREQ, "%s: %s", - __func__, get_usb_statmsg(urb->status)); + __func__, get_usb_statmsg(status)); return; default: /* any failure */ if (++ucs->retry_cmd_out > BAS_RETRY) { dev_warn(cs->dev, "command write: %s, " "giving up after %d retries\n", - get_usb_statmsg(urb->status), + get_usb_statmsg(status), ucs->retry_cmd_out); break; } + if (ucs->basstate & BS_SUSPEND) { + dev_warn(cs->dev, + "command write: %s, " + "won't retry - suspend requested\n", + get_usb_statmsg(status)); + break; + } if (cs->cmdbuf == NULL) { dev_warn(cs->dev, "command write: %s, " "cannot retry - cmdbuf gone\n", - get_usb_statmsg(urb->status)); + get_usb_statmsg(status)); break; } dev_notice(cs->dev, "command write: %s, retry %d\n", - get_usb_statmsg(urb->status), ucs->retry_cmd_out); + get_usb_statmsg(status), ucs->retry_cmd_out); if (atwrite_submit(cs, cs->cmdbuf->buf, cs->cmdbuf->len) >= 0) /* resubmitted - bypass regular exit block */ return; @@ -1799,8 +1860,14 @@ static int start_cbsend(struct cardstate *cs) int rc; int retval = 0; + /* check if suspend requested */ + if (ucs->basstate & BS_SUSPEND) { + gig_dbg(DEBUG_TRANSCMD|DEBUG_LOCKCMD, "suspending"); + return -EHOSTUNREACH; + } + /* check if AT channel is open */ - if (!(atomic_read(&ucs->basstate) & BS_ATOPEN)) { + if (!(ucs->basstate & BS_ATOPEN)) { gig_dbg(DEBUG_TRANSCMD|DEBUG_LOCKCMD, "AT channel not open"); rc = req_submit(cs->bcs, HD_OPEN_ATCHANNEL, 0, BAS_TIMEOUT); if (rc < 0) { @@ -1816,8 +1883,7 @@ static int start_cbsend(struct cardstate *cs) /* try to send first command in queue */ spin_lock_irqsave(&cs->cmdlock, flags); - while ((cb = cs->cmdbuf) != NULL && - atomic_read(&ucs->basstate) & BS_ATREADY) { + while ((cb = cs->cmdbuf) != NULL && (ucs->basstate & BS_ATREADY)) { ucs->retry_cmd_out = 0; rc = atwrite_submit(cs, cb->buf, cb->len); if (unlikely(rc)) { @@ -1855,7 +1921,7 @@ static int gigaset_write_cmd(struct cardstate *cs, unsigned long flags; int rc; - gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ? + gigaset_dbg_buffer(cs->mstate != MS_LOCKED ? DEBUG_TRANSCMD : DEBUG_LOCKCMD, "CMD Transmit", len, buf); @@ -1970,7 +2036,7 @@ static int gigaset_freebcshw(struct bc_state *bcs) return 0; /* kill URBs and tasklets before freeing - better safe than sorry */ - atomic_set(&ubc->running, 0); + ubc->running = 0; gig_dbg(DEBUG_INIT, "%s: killing iso URBs", __func__); for (i = 0; i < BAS_OUTURBS; ++i) { usb_kill_urb(ubc->isoouturbs[i].urb); @@ -2005,7 +2071,7 @@ static int gigaset_initbcshw(struct bc_state *bcs) return 0; } - atomic_set(&ubc->running, 0); + ubc->running = 0; atomic_set(&ubc->corrbytes, 0); spin_lock_init(&ubc->isooutlock); for (i = 0; i < BAS_OUTURBS; ++i) { @@ -2050,7 +2116,7 @@ static void gigaset_reinitbcshw(struct bc_state *bcs) { struct bas_bc_state *ubc = bcs->hw.bas; - atomic_set(&bcs->hw.bas->running, 0); + bcs->hw.bas->running = 0; atomic_set(&bcs->hw.bas->corrbytes, 0); bcs->hw.bas->numsub = 0; spin_lock_init(&ubc->isooutlock); @@ -2081,10 +2147,11 @@ static int gigaset_initcshw(struct cardstate *cs) spin_lock_init(&ucs->lock); ucs->pending = 0; - atomic_set(&ucs->basstate, 0); + ucs->basstate = 0; init_timer(&ucs->timer_ctrl); init_timer(&ucs->timer_atrdy); init_timer(&ucs->timer_cmd_in); + init_waitqueue_head(&ucs->waitqueue); return 1; } @@ -2102,7 +2169,7 @@ static void freeurbs(struct cardstate *cs) int i, j; gig_dbg(DEBUG_INIT, "%s: killing URBs", __func__); - for (j = 0; j < 2; ++j) { + for (j = 0; j < BAS_CHANNELS; ++j) { ubc = cs->bcs[j].hw.bas; for (i = 0; i < BAS_OUTURBS; ++i) { usb_kill_urb(ubc->isoouturbs[i].urb); @@ -2179,11 +2246,11 @@ static int gigaset_probe(struct usb_interface *interface, __func__, le16_to_cpu(udev->descriptor.idVendor), le16_to_cpu(udev->descriptor.idProduct)); - cs = gigaset_getunassignedcs(driver); - if (!cs) { - dev_err(&udev->dev, "no free cardstate\n"); + /* allocate memory for our device state and intialize it */ + cs = gigaset_initcs(driver, BAS_CHANNELS, 0, 0, cidmode, + GIGASET_MODULENAME); + if (!cs) return -ENODEV; - } ucs = cs->hw.bas; /* save off device structure ptrs for later use */ @@ -2203,7 +2270,7 @@ static int gigaset_probe(struct usb_interface *interface, !(ucs->urb_ctrl = usb_alloc_urb(0, GFP_KERNEL))) goto allocerr; - for (j = 0; j < 2; ++j) { + for (j = 0; j < BAS_CHANNELS; ++j) { ubc = cs->bcs[j].hw.bas; for (i = 0; i < BAS_OUTURBS; ++i) if (!(ubc->isoouturbs[i].urb = @@ -2237,7 +2304,7 @@ static int gigaset_probe(struct usb_interface *interface, /* tell common part that the device is ready */ if (startmode == SM_LOCKED) - atomic_set(&cs->mstate, MS_LOCKED); + cs->mstate = MS_LOCKED; /* save address of controller structure */ usb_set_intfdata(interface, cs); @@ -2252,7 +2319,7 @@ allocerr: error: freeurbs(cs); usb_set_intfdata(interface, NULL); - gigaset_unassign(cs); + gigaset_freecs(cs); return -ENODEV; } @@ -2272,11 +2339,10 @@ static void gigaset_disconnect(struct usb_interface *interface) dev_info(cs->dev, "disconnecting Gigaset base\n"); /* mark base as not ready, all channels disconnected */ - atomic_set(&ucs->basstate, 0); + ucs->basstate = 0; /* tell LL all channels are down */ - //FIXME shouldn't gigaset_stop() do this? - for (j = 0; j < 2; ++j) + for (j = 0; j < BAS_CHANNELS; ++j) gigaset_bchannel_down(cs->bcs + j); /* stop driver (common part) */ @@ -2295,9 +2361,113 @@ static void gigaset_disconnect(struct usb_interface *interface) ucs->interface = NULL; ucs->udev = NULL; cs->dev = NULL; - gigaset_unassign(cs); + gigaset_freecs(cs); } +/* gigaset_suspend + * This function is called before the USB connection is suspended. + */ +static int gigaset_suspend(struct usb_interface *intf, pm_message_t message) +{ + struct cardstate *cs = usb_get_intfdata(intf); + struct bas_cardstate *ucs = cs->hw.bas; + int rc; + + /* set suspend flag; this stops AT command/response traffic */ + if (update_basstate(ucs, BS_SUSPEND, 0) & BS_SUSPEND) { + gig_dbg(DEBUG_SUSPEND, "already suspended"); + return 0; + } + + /* wait a bit for blocking conditions to go away */ + rc = wait_event_timeout(ucs->waitqueue, + !(ucs->basstate & + (BS_B1OPEN|BS_B2OPEN|BS_ATRDPEND|BS_ATWRPEND)), + BAS_TIMEOUT*HZ/10); + gig_dbg(DEBUG_SUSPEND, "wait_event_timeout() -> %d", rc); + + /* check for conditions preventing suspend */ + if (ucs->basstate & (BS_B1OPEN|BS_B2OPEN|BS_ATRDPEND|BS_ATWRPEND)) { + dev_warn(cs->dev, "cannot suspend:\n"); + if (ucs->basstate & BS_B1OPEN) + dev_warn(cs->dev, " B channel 1 open\n"); + if (ucs->basstate & BS_B2OPEN) + dev_warn(cs->dev, " B channel 2 open\n"); + if (ucs->basstate & BS_ATRDPEND) + dev_warn(cs->dev, " receiving AT reply\n"); + if (ucs->basstate & BS_ATWRPEND) + dev_warn(cs->dev, " sending AT command\n"); + update_basstate(ucs, 0, BS_SUSPEND); + return -EBUSY; + } + + /* close AT channel if open */ + if (ucs->basstate & BS_ATOPEN) { + gig_dbg(DEBUG_SUSPEND, "closing AT channel"); + rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, 0); + if (rc) { + update_basstate(ucs, 0, BS_SUSPEND); + return rc; + } + wait_event_timeout(ucs->waitqueue, !ucs->pending, + BAS_TIMEOUT*HZ/10); + /* in case of timeout, proceed anyway */ + } + + /* kill all URBs and timers that might still be pending */ + usb_kill_urb(ucs->urb_ctrl); + usb_kill_urb(ucs->urb_int_in); + del_timer_sync(&ucs->timer_ctrl); + + gig_dbg(DEBUG_SUSPEND, "suspend complete"); + return 0; +} + +/* gigaset_resume + * This function is called after the USB connection has been resumed. + */ +static int gigaset_resume(struct usb_interface *intf) +{ + struct cardstate *cs = usb_get_intfdata(intf); + struct bas_cardstate *ucs = cs->hw.bas; + int rc; + + /* resubmit interrupt URB for spontaneous messages from base */ + rc = usb_submit_urb(ucs->urb_int_in, GFP_KERNEL); + if (rc) { + dev_err(cs->dev, "could not resubmit interrupt URB: %s\n", + get_usb_rcmsg(rc)); + return rc; + } + + /* clear suspend flag to reallow activity */ + update_basstate(ucs, 0, BS_SUSPEND); + + gig_dbg(DEBUG_SUSPEND, "resume complete"); + return 0; +} + +/* gigaset_pre_reset + * This function is called before the USB connection is reset. + */ +static int gigaset_pre_reset(struct usb_interface *intf) +{ + /* handle just like suspend */ + return gigaset_suspend(intf, PMSG_ON); +} + +/* gigaset_post_reset + * This function is called after the USB connection has been reset. + */ +static int gigaset_post_reset(struct usb_interface *intf) +{ + /* FIXME: send HD_DEVICE_INIT_ACK? */ + + /* resume operations */ + return gigaset_resume(intf); +} + + static const struct gigaset_ops gigops = { gigaset_write_cmd, gigaset_write_room, @@ -2330,12 +2500,6 @@ static int __init bas_gigaset_init(void) &gigops, THIS_MODULE)) == NULL) goto error; - /* allocate memory for our device state and intialize it */ - cardstate = gigaset_initcs(driver, 2, 0, 0, cidmode, - GIGASET_MODULENAME); - if (!cardstate) - goto error; - /* register this driver with the USB subsystem */ result = usb_register(&gigaset_usb_driver); if (result < 0) { @@ -2347,9 +2511,7 @@ static int __init bas_gigaset_init(void) info(DRIVER_DESC); return 0; -error: if (cardstate) - gigaset_freecs(cardstate); - cardstate = NULL; +error: if (driver) gigaset_freedriver(driver); driver = NULL; @@ -2361,43 +2523,50 @@ error: if (cardstate) */ static void __exit bas_gigaset_exit(void) { - struct bas_cardstate *ucs = cardstate->hw.bas; + struct bas_cardstate *ucs; + int i; gigaset_blockdriver(driver); /* => probe will fail * => no gigaset_start any more */ - gigaset_shutdown(cardstate); - /* from now on, no isdn callback should be possible */ - - /* close all still open channels */ - if (atomic_read(&ucs->basstate) & BS_B1OPEN) { - gig_dbg(DEBUG_INIT, "closing B1 channel"); - usb_control_msg(ucs->udev, usb_sndctrlpipe(ucs->udev, 0), - HD_CLOSE_B1CHANNEL, OUT_VENDOR_REQ, 0, 0, - NULL, 0, BAS_TIMEOUT); - } - if (atomic_read(&ucs->basstate) & BS_B2OPEN) { - gig_dbg(DEBUG_INIT, "closing B2 channel"); - usb_control_msg(ucs->udev, usb_sndctrlpipe(ucs->udev, 0), - HD_CLOSE_B2CHANNEL, OUT_VENDOR_REQ, 0, 0, - NULL, 0, BAS_TIMEOUT); - } - if (atomic_read(&ucs->basstate) & BS_ATOPEN) { - gig_dbg(DEBUG_INIT, "closing AT channel"); - usb_control_msg(ucs->udev, usb_sndctrlpipe(ucs->udev, 0), - HD_CLOSE_ATCHANNEL, OUT_VENDOR_REQ, 0, 0, - NULL, 0, BAS_TIMEOUT); + /* stop all connected devices */ + for (i = 0; i < driver->minors; i++) { + if (gigaset_shutdown(driver->cs + i) < 0) + continue; /* no device */ + /* from now on, no isdn callback should be possible */ + + /* close all still open channels */ + ucs = driver->cs[i].hw.bas; + if (ucs->basstate & BS_B1OPEN) { + gig_dbg(DEBUG_INIT, "closing B1 channel"); + usb_control_msg(ucs->udev, + usb_sndctrlpipe(ucs->udev, 0), + HD_CLOSE_B1CHANNEL, OUT_VENDOR_REQ, + 0, 0, NULL, 0, BAS_TIMEOUT); + } + if (ucs->basstate & BS_B2OPEN) { + gig_dbg(DEBUG_INIT, "closing B2 channel"); + usb_control_msg(ucs->udev, + usb_sndctrlpipe(ucs->udev, 0), + HD_CLOSE_B2CHANNEL, OUT_VENDOR_REQ, + 0, 0, NULL, 0, BAS_TIMEOUT); + } + if (ucs->basstate & BS_ATOPEN) { + gig_dbg(DEBUG_INIT, "closing AT channel"); + usb_control_msg(ucs->udev, + usb_sndctrlpipe(ucs->udev, 0), + HD_CLOSE_ATCHANNEL, OUT_VENDOR_REQ, + 0, 0, NULL, 0, BAS_TIMEOUT); + } + ucs->basstate = 0; } - atomic_set(&ucs->basstate, 0); /* 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; } |