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gigaset: prepare for CAPI implementation

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Reorganize the code of the Gigaset driver, moving all isdn4linux
dependencies to the source file i4l.c so that it can be replaced
by a file capi.c interfacing to Kernel CAPI instead.

Impact: refactoring, no functional change
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tilman Schmidt 2009-10-06 12:19:07 +00:00 committed by David S. Miller
parent 7ecc59c1b7
commit 088ec0cc96
7 changed files with 492 additions and 425 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

112
drivers/isdn/gigaset/asyncdata.c
View File

@ -119,10 +119,7 @@ static inline int hdlc_loop(unsigned char c, unsigned char *src, int numbytes,
int inputstate = bcs->inputstate;
__u16 fcs = bcs->fcs;
struct sk_buff *skb = bcs->skb;
unsigned char error;
struct sk_buff *compskb;
int startbytes = numbytes;
int l;
if (unlikely(inputstate & INS_byte_stuff)) {
inputstate &= ~INS_byte_stuff;
@ -158,8 +155,8 @@ byte_stuff:
#endif
/* end of frame */
error = 1;
gigaset_rcv_error(NULL, cs, bcs);
gigaset_isdn_rcv_err(bcs);
dev_kfree_skb(skb);
} else if (!(inputstate & INS_have_data)) { /* 7E 7E */
#ifdef CONFIG_GIGASET_DEBUG
++bcs->emptycount;
@ -170,55 +167,40 @@ byte_stuff:
"7e----------------------------");
/* end of frame */
error = 0;
if (unlikely(fcs != PPP_GOODFCS)) {
dev_err(cs->dev,
"Checksum failed, %u bytes corrupted!\n",
skb->len);
compskb = NULL;
gigaset_rcv_error(compskb, cs, bcs);
error = 1;
} else {
if (likely((l = skb->len) > 2)) {
skb->tail -= 2;
skb->len -= 2;
} else {
gigaset_isdn_rcv_err(bcs);
dev_kfree_skb(skb);
skb = NULL;
inputstate |= INS_skip_frame;
if (l == 1) {
} else if (likely(skb->len > 2)) {
__skb_trim(skb, skb->len - 2);
gigaset_skb_rcvd(bcs, skb);
} else {
if (skb->len) {
dev_err(cs->dev,
"invalid packet size (1)!\n");
error = 1;
gigaset_rcv_error(NULL,
cs, bcs);
"invalid packet size (%d)\n", skb->len);
gigaset_isdn_rcv_err(bcs);
}
}
if (likely(!(error ||
(inputstate &
INS_skip_frame)))) {
gigaset_rcv_skb(skb, cs, bcs);
}
}
}
if (unlikely(error))
if (skb)
dev_kfree_skb(skb);
}
}
fcs = PPP_INITFCS;
inputstate &= ~(INS_have_data | INS_skip_frame);
if (unlikely(bcs->ignore)) {
inputstate |= INS_skip_frame;
skb = NULL;
} else if (likely((skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN)) != NULL)) {
skb_reserve(skb, HW_HDR_LEN);
} else {
skb = dev_alloc_skb(SBUFSIZE + cs->hw_hdr_len);
if (skb != NULL) {
skb_reserve(skb, cs->hw_hdr_len);
} else {
dev_warn(cs->dev,
"could not allocate new skb\n");
inputstate |= INS_skip_frame;
}
}
break;
} else if (unlikely(muststuff(c))) {
@ -314,20 +296,23 @@ static inline int iraw_loop(unsigned char c, unsigned char *src, int numbytes,
/* pass data up */
if (likely(inputstate & INS_have_data)) {
if (likely(!(inputstate & INS_skip_frame))) {
gigaset_rcv_skb(skb, cs, bcs);
gigaset_skb_rcvd(bcs, skb);
}
inputstate &= ~(INS_have_data | INS_skip_frame);
if (unlikely(bcs->ignore)) {
inputstate |= INS_skip_frame;
skb = NULL;
} else if (likely((skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN))
!= NULL)) {
skb_reserve(skb, HW_HDR_LEN);
} else {
dev_warn(cs->dev, "could not allocate new skb\n");
skb = dev_alloc_skb(SBUFSIZE + cs->hw_hdr_len);
if (skb != NULL) {
skb_reserve(skb, cs->hw_hdr_len);
} else {
dev_warn(cs->dev,
"could not allocate new skb\n");
inputstate |= INS_skip_frame;
}
}
}
bcs->inputstate = inputstate;
bcs->skb = skb;
@ -383,7 +368,7 @@ void gigaset_m10x_input(struct inbuf_t *inbuf)
/* FIXME use function pointers? */
if (inbuf->inputstate & INS_command)
procbytes = cmd_loop(c, src, numbytes, inbuf);
else if (inbuf->bcs->proto2 == ISDN_PROTO_L2_HDLC)
else if (inbuf->bcs->proto2 == L2_HDLC)
procbytes = hdlc_loop(c, src, numbytes, inbuf);
else
procbytes = iraw_loop(c, src, numbytes, inbuf);
@ -440,16 +425,16 @@ EXPORT_SYMBOL_GPL(gigaset_m10x_input);
/* == data output ========================================================== */
/* Encoding of a PPP packet into an octet stuffed HDLC frame
* with FCS, opening and closing flags.
/*
* Encode a data packet into an octet stuffed HDLC frame with FCS,
* opening and closing flags, preserving headroom data.
* parameters:
* skb skb containing original packet (freed upon return)
* head number of headroom bytes to allocate in result skb
* tail number of tailroom bytes to allocate in result skb
* headroom number of headroom bytes to preserve
* Return value:
* pointer to newly allocated skb containing the result frame
*/
static struct sk_buff *HDLC_Encode(struct sk_buff *skb, int head, int tail)
static struct sk_buff *HDLC_Encode(struct sk_buff *skb, int headroom)
{
struct sk_buff *hdlc_skb;
__u16 fcs;
@ -471,16 +456,17 @@ static struct sk_buff *HDLC_Encode(struct sk_buff *skb, int head, int tail)
/* size of new buffer: original size + number of stuffing bytes
* + 2 bytes FCS + 2 stuffing bytes for FCS (if needed) + 2 flag bytes
* + room for acknowledgement header
*/
hdlc_skb = dev_alloc_skb(skb->len + stuf_cnt + 6 + tail + head);
hdlc_skb = dev_alloc_skb(skb->len + stuf_cnt + 6 + headroom);
if (!hdlc_skb) {
dev_kfree_skb(skb);
return NULL;
}
skb_reserve(hdlc_skb, head);
/* Copy acknowledge request into new skb */
memcpy(hdlc_skb->head, skb->head, 2);
/* Copy acknowledgement header into new skb */
skb_reserve(hdlc_skb, headroom);
memcpy(hdlc_skb->head, skb->head, headroom);
/* Add flag sequence in front of everything.. */
*(skb_put(hdlc_skb, 1)) = PPP_FLAG;
@ -515,15 +501,16 @@ static struct sk_buff *HDLC_Encode(struct sk_buff *skb, int head, int tail)
return hdlc_skb;
}
/* Encoding of a raw packet into an octet stuffed bit inverted frame
/*
* Encode a data packet into an octet stuffed raw bit inverted frame,
* preserving headroom data.
* parameters:
* skb skb containing original packet (freed upon return)
* head number of headroom bytes to allocate in result skb
* tail number of tailroom bytes to allocate in result skb
* headroom number of headroom bytes to preserve
* Return value:
* pointer to newly allocated skb containing the result frame
*/
static struct sk_buff *iraw_encode(struct sk_buff *skb, int head, int tail)
static struct sk_buff *iraw_encode(struct sk_buff *skb, int headroom)
{
struct sk_buff *iraw_skb;
unsigned char c;
@ -531,12 +518,15 @@ static struct sk_buff *iraw_encode(struct sk_buff *skb, int head, int tail)
int len;
/* worst case: every byte must be stuffed */
iraw_skb = dev_alloc_skb(2*skb->len + tail + head);
iraw_skb = dev_alloc_skb(2*skb->len + headroom);
if (!iraw_skb) {
dev_kfree_skb(skb);
return NULL;
}
skb_reserve(iraw_skb, head);
/* Copy acknowledgement header into new skb */
skb_reserve(iraw_skb, headroom);
memcpy(iraw_skb->head, skb->head, headroom);
cp = skb->data;
len = skb->len;
@ -555,8 +545,10 @@ static struct sk_buff *iraw_encode(struct sk_buff *skb, int head, int tail)
* @bcs: B channel descriptor structure.
* @skb: data to send.
*
* Called by i4l.c to encode and queue an skb for sending, and start
* Called by LL to encode and queue an skb for sending, and start
* transmission if necessary.
* Once the payload data has been transmitted completely, gigaset_skb_sent()
* will be called with the first cs->hw_hdr_len bytes of skb->head preserved.
*
* Return value:
* number of bytes accepted for sending (skb->len) if ok,
@ -567,10 +559,10 @@ int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb)
unsigned len = skb->len;
unsigned long flags;
if (bcs->proto2 == ISDN_PROTO_L2_HDLC)
skb = HDLC_Encode(skb, HW_HDR_LEN, 0);
if (bcs->proto2 == L2_HDLC)
skb = HDLC_Encode(skb, bcs->cs->hw_hdr_len);
else
skb = iraw_encode(skb, HW_HDR_LEN, 0);
skb = iraw_encode(skb, bcs->cs->hw_hdr_len);
if (!skb) {
dev_err(bcs->cs->dev,
"unable to allocate memory for encoding!\n");

4
drivers/isdn/gigaset/bas-gigaset.c
View File

@ -911,7 +911,7 @@ static int starturbs(struct bc_state *bcs)
int rc;
/* initialize L2 reception */
if (bcs->proto2 == ISDN_PROTO_L2_HDLC)
if (bcs->proto2 == L2_HDLC)
bcs->inputstate |= INS_flag_hunt;
/* submit all isochronous input URBs */
@ -1064,7 +1064,7 @@ static int submit_iso_write_urb(struct isow_urbctx_t *ucx)
"%s: buffer busy at frame %d",
__func__, nframe);
/* tasklet will be restarted from
gigaset_send_skb() */
gigaset_isoc_send_skb() */
} else {
dev_err(ucx->bcs->cs->dev,
"%s: buffer error %d at frame %d\n",

44
drivers/isdn/gigaset/common.c
View File

@ -463,6 +463,12 @@ void gigaset_freecs(struct cardstate *cs)
switch (cs->cs_init) {
default:
/* clear B channel structures */
for (i = 0; i < cs->channels; ++i) {
gig_dbg(DEBUG_INIT, "clearing bcs[%d]", i);
gigaset_freebcs(cs->bcs + i);
}
/* clear device sysfs */
gigaset_free_dev_sysfs(cs);
@ -477,22 +483,16 @@ void gigaset_freecs(struct cardstate *cs)
case 2: /* error in initcshw */
/* Deregister from LL */
make_invalid(cs, VALID_ID);
gig_dbg(DEBUG_INIT, "clearing iif");
gigaset_i4l_cmd(cs, ISDN_STAT_UNLOAD);
gigaset_isdn_unregister(cs);
/* fall through */
case 1: /* error when regestering to LL */
case 1: /* error when registering to LL */
gig_dbg(DEBUG_INIT, "clearing at_state");
clear_at_state(&cs->at_state);
dealloc_at_states(cs);
/* fall through */
case 0: /* error in one call to initbcs */
for (i = 0; i < cs->channels; ++i) {
gig_dbg(DEBUG_INIT, "clearing bcs[%d]", i);
gigaset_freebcs(cs->bcs + i);
}
case 0: /* error in basic setup */
clear_events(cs);
gig_dbg(DEBUG_INIT, "freeing inbuf");
kfree(cs->inbuf);
@ -620,12 +620,15 @@ static struct bc_state *gigaset_initbcs(struct bc_state *bcs,
if (cs->ignoreframes) {
bcs->inputstate |= INS_skip_frame;
bcs->skb = NULL;
} else if ((bcs->skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN)) != NULL)
skb_reserve(bcs->skb, HW_HDR_LEN);
} else {
bcs->skb = dev_alloc_skb(SBUFSIZE + cs->hw_hdr_len);
if (bcs->skb != NULL)
skb_reserve(bcs->skb, cs->hw_hdr_len);
else {
pr_err("out of memory\n");
bcs->inputstate |= INS_skip_frame;
}
}
bcs->channel = channel;
bcs->cs = cs;
@ -726,14 +729,6 @@ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
cs->mode = M_UNKNOWN;
cs->mstate = MS_UNINITIALIZED;
for (i = 0; i < channels; ++i) {
gig_dbg(DEBUG_INIT, "setting up bcs[%d].read", i);
if (!gigaset_initbcs(cs->bcs + i, cs, i)) {
pr_err("could not allocate channel %d data\n", i);
goto error;
}
}
++cs->cs_init;
gig_dbg(DEBUG_INIT, "setting up at_state");
@ -758,7 +753,7 @@ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
cs->cmdbytes = 0;
gig_dbg(DEBUG_INIT, "setting up iif");
if (!gigaset_register_to_LL(cs, modulename)) {
if (!gigaset_isdn_register(cs, modulename)) {
pr_err("error registering ISDN device\n");
goto error;
}
@ -777,6 +772,15 @@ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
/* set up device sysfs */
gigaset_init_dev_sysfs(cs);
/* set up channel data structures */
for (i = 0; i < channels; ++i) {
gig_dbg(DEBUG_INIT, "setting up bcs[%d]", i);
if (!gigaset_initbcs(cs->bcs + i, cs, i)) {
pr_err("could not allocate channel %d data\n", i);
goto error;
}
}
spin_lock_irqsave(&cs->lock, flags);
cs->running = 1;
spin_unlock_irqrestore(&cs->lock, flags);

64
drivers/isdn/gigaset/ev-layer.c
View File

@ -127,7 +127,6 @@
#define ACT_NOTIFY_BC_UP 39
#define ACT_DIAL 40
#define ACT_ACCEPT 41
#define ACT_PROTO_L2 42
#define ACT_HUP 43
#define ACT_IF_LOCK 44
#define ACT_START 45
@ -365,8 +364,6 @@ struct reply_t gigaset_tab_cid[] =
{EV_BC_CLOSED, -1, -1, -1, -1,-1, {ACT_NOTIFY_BC_DOWN}}, //FIXME
/* misc. */
{EV_PROTO_L2, -1, -1, -1, -1,-1, {ACT_PROTO_L2}}, //FIXME
{RSP_ZCON, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME
{RSP_ZCCR, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME
{RSP_ZAOC, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME
@ -714,7 +711,7 @@ static void disconnect(struct at_state_t **at_state_p)
/* notify LL */
if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DHUP);
gigaset_isdn_hupD(bcs);
}
} else {
/* no B channel assigned: just deallocate */
@ -872,12 +869,12 @@ static void bchannel_down(struct bc_state *bcs)
{
if (bcs->chstate & CHS_B_UP) {
bcs->chstate &= ~CHS_B_UP;
gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BHUP);
gigaset_isdn_hupB(bcs);
}
if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DHUP);
gigaset_isdn_hupD(bcs);
}
gigaset_free_channel(bcs);
@ -894,15 +891,16 @@ static void bchannel_up(struct bc_state *bcs)
}
bcs->chstate |= CHS_B_UP;
gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BCONN);
gigaset_isdn_connB(bcs);
}
static void start_dial(struct at_state_t *at_state, void *data, unsigned seq_index)
{
struct bc_state *bcs = at_state->bcs;
struct cardstate *cs = at_state->cs;
int retval;
char **commands = data;
unsigned long flags;
int i;
bcs->chstate |= CHS_NOTIFY_LL;
@ -913,10 +911,10 @@ static void start_dial(struct at_state_t *at_state, void *data, unsigned seq_ind
}
spin_unlock_irqrestore(&cs->lock, flags);
retval = gigaset_isdn_setup_dial(at_state, data);
if (retval != 0)
goto error;
for (i = 0; i < AT_NUM; ++i) {
kfree(bcs->commands[i]);
bcs->commands[i] = commands[i];
}
at_state->pending_commands |= PC_CID;
gig_dbg(DEBUG_CMD, "Scheduling PC_CID");
@ -924,6 +922,10 @@ static void start_dial(struct at_state_t *at_state, void *data, unsigned seq_ind
return;
error:
for (i = 0; i < AT_NUM; ++i) {
kfree(commands[i]);
commands[i] = NULL;
}
at_state->pending_commands |= PC_NOCID;
gig_dbg(DEBUG_CMD, "Scheduling PC_NOCID");
cs->commands_pending = 1;
@ -933,20 +935,31 @@ error:
static void start_accept(struct at_state_t *at_state)
{
struct cardstate *cs = at_state->cs;
int retval;
struct bc_state *bcs = at_state->bcs;
int i;
retval = gigaset_isdn_setup_accept(at_state);
for (i = 0; i < AT_NUM; ++i) {
kfree(bcs->commands[i]);
bcs->commands[i] = NULL;
}
if (retval == 0) {
at_state->pending_commands |= PC_ACCEPT;
gig_dbg(DEBUG_CMD, "Scheduling PC_ACCEPT");
cs->commands_pending = 1;
} else {
bcs->commands[AT_PROTO] = kmalloc(9, GFP_ATOMIC);
bcs->commands[AT_ISO] = kmalloc(9, GFP_ATOMIC);
if (!bcs->commands[AT_PROTO] || !bcs->commands[AT_ISO]) {
dev_err(at_state->cs->dev, "out of memory\n");
/* error reset */
at_state->pending_commands |= PC_HUP;
gig_dbg(DEBUG_CMD, "Scheduling PC_HUP");
cs->commands_pending = 1;
return;
}
snprintf(bcs->commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
snprintf(bcs->commands[AT_ISO], 9, "^SISO=%u\r", bcs->channel + 1);
at_state->pending_commands |= PC_ACCEPT;
gig_dbg(DEBUG_CMD, "Scheduling PC_ACCEPT");
cs->commands_pending = 1;
}
static void do_start(struct cardstate *cs)
@ -957,7 +970,7 @@ static void do_start(struct cardstate *cs)
schedule_init(cs, MS_INIT);
cs->isdn_up = 1;
gigaset_i4l_cmd(cs, ISDN_STAT_RUN);
gigaset_isdn_start(cs);
// FIXME: not in locked mode
// FIXME 2: only after init sequence
@ -975,7 +988,7 @@ static void finish_shutdown(struct cardstate *cs)
/* Tell the LL that the device is not available .. */
if (cs->isdn_up) {
cs->isdn_up = 0;
gigaset_i4l_cmd(cs, ISDN_STAT_STOP);
gigaset_isdn_stop(cs);
}
/* The rest is done by cleanup_cs () in user mode. */
@ -1276,7 +1289,7 @@ static void do_action(int action, struct cardstate *cs,
break;
}
bcs->chstate |= CHS_D_UP;
gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN);
gigaset_isdn_connD(bcs);
cs->ops->init_bchannel(bcs);
break;
case ACT_DLE1:
@ -1284,7 +1297,7 @@ static void do_action(int action, struct cardstate *cs,
bcs = cs->bcs + cs->curchannel;
bcs->chstate |= CHS_D_UP;
gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN);
gigaset_isdn_connD(bcs);
cs->ops->init_bchannel(bcs);
break;
case ACT_FAKEHUP:
@ -1474,11 +1487,6 @@ static void do_action(int action, struct cardstate *cs,
case ACT_ACCEPT:
start_accept(at_state);
break;
case ACT_PROTO_L2:
gig_dbg(DEBUG_CMD, "set protocol to %u",
(unsigned) ev->parameter);
at_state->bcs->proto2 = ev->parameter;
break;
case ACT_HUP:
at_state->pending_commands |= PC_HUP;
cs->commands_pending = 1;

90
drivers/isdn/gigaset/gigaset.h
View File

@ -23,7 +23,6 @@
#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/isdnif.h>
#include <linux/usb.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
@ -40,7 +39,6 @@
#define MAX_REC_PARAMS 10 /* Max. number of params in response string */
#define MAX_RESP_SIZE 512 /* Max. size of a response string */
#define HW_HDR_LEN 2 /* Header size used to store ack info */
#define MAX_EVENTS 64 /* size of event queue */
@ -216,7 +214,6 @@ void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
#define EV_START -110
#define EV_STOP -111
#define EV_IF_LOCK -112
#define EV_PROTO_L2 -113
#define EV_ACCEPT -114
#define EV_DIAL -115
#define EV_HUP -116
@ -259,6 +256,11 @@ void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
#define SM_LOCKED 0
#define SM_ISDN 1 /* default */
/* layer 2 protocols (AT^SBPR=...) */
#define L2_BITSYNC 0
#define L2_HDLC 1
#define L2_VOICE 2
struct gigaset_ops;
struct gigaset_driver;
@ -395,7 +397,7 @@ struct bc_state {
unsigned chstate; /* bitmap (CHS_*) */
int ignore;
unsigned proto2; /* Layer 2 protocol (ISDN_PROTO_L2_*) */
unsigned proto2; /* layer 2 protocol (L2_*) */
char *commands[AT_NUM]; /* see AT_XXXX */
#ifdef CONFIG_GIGASET_DEBUG
@ -456,12 +458,13 @@ struct cardstate {
unsigned running; /* !=0 if events are handled */
unsigned connected; /* !=0 if hardware is connected */
unsigned isdn_up; /* !=0 after ISDN_STAT_RUN */
unsigned isdn_up; /* !=0 after gigaset_isdn_start() */
unsigned cidmode;
int myid; /* id for communication with LL */
isdn_if iif;
void *iif; /* LL interface structure */
unsigned short hw_hdr_len; /* headroom needed in data skbs */
struct reply_t *tabnocid;
struct reply_t *tabcid;
@ -616,7 +619,9 @@ struct gigaset_ops {
int (*baud_rate)(struct cardstate *cs, unsigned cflag);
int (*set_line_ctrl)(struct cardstate *cs, unsigned cflag);
/* Called from i4l.c to put an skb into the send-queue. */
/* Called from LL interface to put an skb into the send-queue.
* After sending is completed, gigaset_skb_sent() must be called
* with the first cs->hw_hdr_len bytes of skb->head preserved. */
int (*send_skb)(struct bc_state *bcs, struct sk_buff *skb);
/* Called from ev-layer.c to process a block of data
@ -638,8 +643,7 @@ struct gigaset_ops {
* Functions implemented in asyncdata.c
*/
/* Called from i4l.c to put an skb into the send-queue.
* After sending gigaset_skb_sent() should be called. */
/* Called from LL interface to put an skb into the send queue. */
int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb);
/* Called from ev-layer.c to process a block of data
@ -650,8 +654,7 @@ void gigaset_m10x_input(struct inbuf_t *inbuf);
* Functions implemented in isocdata.c
*/
/* Called from i4l.c to put an skb into the send-queue.
* After sending gigaset_skb_sent() should be called. */
/* Called from LL interface to put an skb into the send queue. */
int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb);
/* Called from ev-layer.c to process a block of data
@ -674,36 +677,26 @@ void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle);
int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size);
/* ===========================================================================
* Functions implemented in i4l.c/gigaset.h
* Functions implemented in LL interface
*/
/* Called by gigaset_initcs() for setting up with the isdn4linux subsystem */
int gigaset_register_to_LL(struct cardstate *cs, const char *isdnid);
/* Called from common.c for setting up/shutting down with the ISDN subsystem */
int gigaset_isdn_register(struct cardstate *cs, const char *isdnid);
void gigaset_isdn_unregister(struct cardstate *cs);
/* Called from xxx-gigaset.c to indicate completion of sending an skb */
/* Called from hardware module to indicate completion of an skb */
void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb);
void gigaset_isdn_rcv_err(struct bc_state *bcs);
/* Called from common.c/ev-layer.c to indicate events relevant to the LL */
void gigaset_isdn_start(struct cardstate *cs);
void gigaset_isdn_stop(struct cardstate *cs);
int gigaset_isdn_icall(struct at_state_t *at_state);
int gigaset_isdn_setup_accept(struct at_state_t *at_state);
int gigaset_isdn_setup_dial(struct at_state_t *at_state, void *data);
void gigaset_i4l_cmd(struct cardstate *cs, int cmd);
void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd);
static inline void gigaset_isdn_rcv_err(struct bc_state *bcs)
{
isdn_ctrl response;
/* error -> LL */
gig_dbg(DEBUG_CMD, "sending L1ERR");
response.driver = bcs->cs->myid;
response.command = ISDN_STAT_L1ERR;
response.arg = bcs->channel;
response.parm.errcode = ISDN_STAT_L1ERR_RECV;
bcs->cs->iif.statcallb(&response);
}
void gigaset_isdn_connD(struct bc_state *bcs);
void gigaset_isdn_hupD(struct bc_state *bcs);
void gigaset_isdn_connB(struct bc_state *bcs);
void gigaset_isdn_hupB(struct bc_state *bcs);
/* ===========================================================================
* Functions implemented in ev-layer.c
@ -816,35 +809,6 @@ static inline void gigaset_bchannel_up(struct bc_state *bcs)
/* handling routines for sk_buff */
/* ============================= */
/* pass received skb to LL
* Warning: skb must not be accessed anymore!
*/
static inline void gigaset_rcv_skb(struct sk_buff *skb,
struct cardstate *cs,
struct bc_state *bcs)
{
cs->iif.rcvcallb_skb(cs->myid, bcs->channel, skb);
bcs->trans_down++;
}
/* handle reception of corrupted skb
* Warning: skb must not be accessed anymore!
*/
static inline void gigaset_rcv_error(struct sk_buff *procskb,
struct cardstate *cs,
struct bc_state *bcs)
{
if (procskb)
dev_kfree_skb(procskb);
if (bcs->ignore)
--bcs->ignore;
else {
++bcs->corrupted;
gigaset_isdn_rcv_err(bcs);
}
}
/* append received bytes to inbuf */
int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
unsigned numbytes);

506
drivers/isdn/gigaset/i4l.c
View File

@ -14,6 +14,9 @@
*/
#include "gigaset.h"
#include <linux/isdnif.h>
#define HW_HDR_LEN 2 /* Header size used to store ack info */
/* == Handling of I4L IO =====================================================*/
@ -95,6 +98,7 @@ static int writebuf_from_LL(int driverID, int channel, int ack,
*/
void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb)
{
isdn_if *iif = bcs->cs->iif;
unsigned len;
isdn_ctrl response;
@ -114,71 +118,177 @@ void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb)
response.command = ISDN_STAT_BSENT;
response.arg = bcs->channel;
response.parm.length = len;
bcs->cs->iif.statcallb(&response);
iif->statcallb(&response);
}
}
EXPORT_SYMBOL_GPL(gigaset_skb_sent);
/**
* gigaset_skb_rcvd() - pass received skb to LL
* @bcs: B channel descriptor structure.
* @skb: received data.
*
* Called by hardware module {bas,ser,usb}_gigaset when user data has
* been successfully received, for passing to the LL.
* Warning: skb must not be accessed anymore!
*/
void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb)
{
isdn_if *iif = bcs->cs->iif;
iif->rcvcallb_skb(bcs->cs->myid, bcs->channel, skb);
bcs->trans_down++;
}
EXPORT_SYMBOL_GPL(gigaset_skb_rcvd);
/**
* gigaset_isdn_rcv_err() - signal receive error
* @bcs: B channel descriptor structure.
*
* Called by hardware module {bas,ser,usb}_gigaset when a receive error
* has occurred, for signalling to the LL.
*/
void gigaset_isdn_rcv_err(struct bc_state *bcs)
{
isdn_if *iif = bcs->cs->iif;
isdn_ctrl response;
/* if currently ignoring packets, just count down */
if (bcs->ignore) {
bcs->ignore--;
return;
}
/* update statistics */
bcs->corrupted++;
/* error -> LL */
gig_dbg(DEBUG_CMD, "sending L1ERR");
response.driver = bcs->cs->myid;
response.command = ISDN_STAT_L1ERR;
response.arg = bcs->channel;
response.parm.errcode = ISDN_STAT_L1ERR_RECV;
iif->statcallb(&response);
}
EXPORT_SYMBOL_GPL(gigaset_isdn_rcv_err);
/* This function will be called by LL to send commands
* NOTE: LL ignores the returned value, for commands other than ISDN_CMD_IOCTL,
* so don't put too much effort into it.
*/
static int command_from_LL(isdn_ctrl *cntrl)
{
struct cardstate *cs = gigaset_get_cs_by_id(cntrl->driver);
struct cardstate *cs;
struct bc_state *bcs;
int retval = 0;
struct setup_parm *sp;
char **commands;
int ch;
int i;
size_t l;
gigaset_debugdrivers();
if (!cs) {
gig_dbg(DEBUG_CMD, "driver: %d, command: %d, arg: 0x%lx",
cntrl->driver, cntrl->command, cntrl->arg);
cs = gigaset_get_cs_by_id(cntrl->driver);
if (cs == NULL) {
pr_err("%s: invalid driver ID (%d)\n", __func__, cntrl->driver);
return -ENODEV;
}
ch = cntrl->arg & 0xff;
switch (cntrl->command) {
case ISDN_CMD_IOCTL:
gig_dbg(DEBUG_ANY, "ISDN_CMD_IOCTL (driver: %d, arg: %ld)",
cntrl->driver, cntrl->arg);
dev_warn(cs->dev, "ISDN_CMD_IOCTL not supported\n");
return -EINVAL;
case ISDN_CMD_DIAL:
gig_dbg(DEBUG_ANY,
"ISDN_CMD_DIAL (driver: %d, ch: %ld, "
"phone: %s, ownmsn: %s, si1: %d, si2: %d)",
cntrl->driver, cntrl->arg,
"ISDN_CMD_DIAL (phone: %s, msn: %s, si1: %d, si2: %d)",
cntrl->parm.setup.phone, cntrl->parm.setup.eazmsn,
cntrl->parm.setup.si1, cntrl->parm.setup.si2);
if (cntrl->arg >= cs->channels) {
if (ch >= cs->channels) {
dev_err(cs->dev,
"ISDN_CMD_DIAL: invalid channel (%d)\n",
(int) cntrl->arg);
"ISDN_CMD_DIAL: invalid channel (%d)\n", ch);
return -EINVAL;
}
bcs = cs->bcs + cntrl->arg;
bcs = cs->bcs + ch;
if (!gigaset_get_channel(bcs)) {
dev_err(cs->dev, "ISDN_CMD_DIAL: channel not free\n");
return -EBUSY;
}
sp = kmalloc(sizeof *sp, GFP_ATOMIC);
if (!sp) {
commands = kzalloc(AT_NUM*(sizeof *commands), GFP_ATOMIC);
if (!commands) {
gigaset_free_channel(bcs);
dev_err(cs->dev, "ISDN_CMD_DIAL: out of memory\n");
return -ENOMEM;
}
*sp = cntrl->parm.setup;
if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, sp,
l = 3 + strlen(cntrl->parm.setup.phone);
commands[AT_DIAL] = kmalloc(l, GFP_ATOMIC);
if (!commands[AT_DIAL])
goto oom;
if (cntrl->parm.setup.phone[0] == '*' &&
cntrl->parm.setup.phone[1] == '*') {
/* internal call: translate ** prefix to CTP value */
commands[AT_TYPE] = kstrdup("^SCTP=0\r", GFP_ATOMIC);
if (!commands[AT_TYPE])
goto oom;
snprintf(commands[AT_DIAL], l,
"D%s\r", cntrl->parm.setup.phone+2);
} else {
commands[AT_TYPE] = kstrdup("^SCTP=1\r", GFP_ATOMIC);
if (!commands[AT_TYPE])
goto oom;
snprintf(commands[AT_DIAL], l,
"D%s\r", cntrl->parm.setup.phone);
}
l = strlen(cntrl->parm.setup.eazmsn);
if (l) {
l += 8;
commands[AT_MSN] = kmalloc(l, GFP_ATOMIC);
if (!commands[AT_MSN])
goto oom;
snprintf(commands[AT_MSN], l, "^SMSN=%s\r",
cntrl->parm.setup.eazmsn);
}
switch (cntrl->parm.setup.si1) {
case 1: /* audio */
/* BC = 9090A3: 3.1 kHz audio, A-law */
commands[AT_BC] = kstrdup("^SBC=9090A3\r", GFP_ATOMIC);
if (!commands[AT_BC])
goto oom;
break;
case 7: /* data */
default: /* hope the app knows what it is doing */
/* BC = 8890: unrestricted digital information */
commands[AT_BC] = kstrdup("^SBC=8890\r", GFP_ATOMIC);
if (!commands[AT_BC])
goto oom;
}
/* ToDo: other si1 values, inspect si2, set HLC/LLC */
commands[AT_PROTO] = kmalloc(9, GFP_ATOMIC);
if (!commands[AT_PROTO])
goto oom;
snprintf(commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
commands[AT_ISO] = kmalloc(9, GFP_ATOMIC);
if (!commands[AT_ISO])
goto oom;
snprintf(commands[AT_ISO], 9, "^SISO=%u\r",
(unsigned) bcs->channel + 1);
if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, commands,
bcs->at_state.seq_index, NULL)) {
//FIXME what should we do?
kfree(sp);
for (i = 0; i < AT_NUM; ++i)
kfree(commands[i]);
kfree(commands);
gigaset_free_channel(bcs);
return -ENOMEM;
}
@ -186,93 +296,83 @@ static int command_from_LL(isdn_ctrl *cntrl)
gig_dbg(DEBUG_CMD, "scheduling DIAL");
gigaset_schedule_event(cs);
break;
case ISDN_CMD_ACCEPTD: //FIXME
gig_dbg(DEBUG_ANY, "ISDN_CMD_ACCEPTD");
if (cntrl->arg >= cs->channels) {
case ISDN_CMD_ACCEPTD:
if (ch >= cs->channels) {
dev_err(cs->dev,
"ISDN_CMD_ACCEPTD: invalid channel (%d)\n",
(int) cntrl->arg);
"ISDN_CMD_ACCEPTD: invalid channel (%d)\n", ch);
return -EINVAL;
}
if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg].at_state,
EV_ACCEPT, NULL, 0, NULL)) {
//FIXME what should we do?
bcs = cs->bcs + ch;
if (!gigaset_add_event(cs, &bcs->at_state,
EV_ACCEPT, NULL, 0, NULL))
return -ENOMEM;
}
gig_dbg(DEBUG_CMD, "scheduling ACCEPT");
gigaset_schedule_event(cs);
break;
case ISDN_CMD_ACCEPTB:
gig_dbg(DEBUG_ANY, "ISDN_CMD_ACCEPTB");
break;
case ISDN_CMD_HANGUP:
gig_dbg(DEBUG_ANY, "ISDN_CMD_HANGUP (ch: %d)",
(int) cntrl->arg);
if (cntrl->arg >= cs->channels) {
if (ch >= cs->channels) {
dev_err(cs->dev,
"ISDN_CMD_HANGUP: invalid channel (%d)\n",
(int) cntrl->arg);
"ISDN_CMD_HANGUP: invalid channel (%d)\n", ch);
return -EINVAL;
}
if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg].at_state,
EV_HUP, NULL, 0, NULL)) {
//FIXME what should we do?
bcs = cs->bcs + ch;
if (!gigaset_add_event(cs, &bcs->at_state,
EV_HUP, NULL, 0, NULL))
return -ENOMEM;
}
gig_dbg(DEBUG_CMD, "scheduling HUP");
gigaset_schedule_event(cs);
break;
case ISDN_CMD_CLREAZ: /* Do not signal incoming signals */ //FIXME
gig_dbg(DEBUG_ANY, "ISDN_CMD_CLREAZ");
case ISDN_CMD_CLREAZ: /* Do not signal incoming signals */
dev_info(cs->dev, "ignoring ISDN_CMD_CLREAZ\n");
break;
case ISDN_CMD_SETEAZ: /* Signal incoming calls for given MSN */ //FIXME
gig_dbg(DEBUG_ANY,
"ISDN_CMD_SETEAZ (id: %d, ch: %ld, number: %s)",
cntrl->driver, cntrl->arg, cntrl->parm.num);
case ISDN_CMD_SETEAZ: /* Signal incoming calls for given MSN */
dev_info(cs->dev, "ignoring ISDN_CMD_SETEAZ (%s)\n",
cntrl->parm.num);
break;
case ISDN_CMD_SETL2: /* Set L2 to given protocol */
gig_dbg(DEBUG_ANY, "ISDN_CMD_SETL2 (ch: %ld, proto: %lx)",
cntrl->arg & 0xff, (cntrl->arg >> 8));
if ((cntrl->arg & 0xff) >= cs->channels) {
if (ch >= cs->channels) {
dev_err(cs->dev,
"ISDN_CMD_SETL2: invalid channel (%d)\n",
(int) cntrl->arg & 0xff);
"ISDN_CMD_SETL2: invalid channel (%d)\n", ch);
return -EINVAL;
}
if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg & 0xff].at_state,
EV_PROTO_L2, NULL, cntrl->arg >> 8,
NULL)) {
//FIXME what should we do?
return -ENOMEM;
bcs = cs->bcs + ch;
if (bcs->chstate & CHS_D_UP) {
dev_err(cs->dev,
"ISDN_CMD_SETL2: channel active (%d)\n", ch);
return -EINVAL;
}
switch (cntrl->arg >> 8) {
case ISDN_PROTO_L2_HDLC:
gig_dbg(DEBUG_CMD, "ISDN_CMD_SETL2: setting L2_HDLC");
bcs->proto2 = L2_HDLC;
break;
case ISDN_PROTO_L2_TRANS:
gig_dbg(DEBUG_CMD, "ISDN_CMD_SETL2: setting L2_VOICE");
bcs->proto2 = L2_VOICE;
break;
default:
dev_err(cs->dev,
"ISDN_CMD_SETL2: unsupported protocol (%lu)\n",
cntrl->arg >> 8);
return -EINVAL;
}
gig_dbg(DEBUG_CMD, "scheduling PROTO_L2");
gigaset_schedule_event(cs);
break;
case ISDN_CMD_SETL3: /* Set L3 to given protocol */
gig_dbg(DEBUG_ANY, "ISDN_CMD_SETL3 (ch: %ld, proto: %lx)",
cntrl->arg & 0xff, (cntrl->arg >> 8));
if ((cntrl->arg & 0xff) >= cs->channels) {
if (ch >= cs->channels) {
dev_err(cs->dev,
"ISDN_CMD_SETL3: invalid channel (%d)\n",
(int) cntrl->arg & 0xff);
"ISDN_CMD_SETL3: invalid channel (%d)\n", ch);
return -EINVAL;
}
if (cntrl->arg >> 8 != ISDN_PROTO_L3_TRANS) {
dev_err(cs->dev,
"ISDN_CMD_SETL3: invalid protocol %lu\n",
"ISDN_CMD_SETL3: unsupported protocol (%lu)\n",
cntrl->arg >> 8);
return -EINVAL;
}
@ -324,149 +424,34 @@ static int command_from_LL(isdn_ctrl *cntrl)
}
return retval;
oom:
dev_err(bcs->cs->dev, "out of memory\n");
for (i = 0; i < AT_NUM; ++i)
kfree(commands[i]);
return -ENOMEM;
}
void gigaset_i4l_cmd(struct cardstate *cs, int cmd)
static void gigaset_i4l_cmd(struct cardstate *cs, int cmd)
{
isdn_if *iif = cs->iif;
isdn_ctrl command;
command.driver = cs->myid;
command.command = cmd;
command.arg = 0;
cs->iif.statcallb(&command);
iif->statcallb(&command);
}
void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd)
static void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd)
{
isdn_if *iif = bcs->cs->iif;
isdn_ctrl command;
command.driver = bcs->cs->myid;
command.command = cmd;
command.arg = bcs->channel;
bcs->cs->iif.statcallb(&command);
}
int gigaset_isdn_setup_dial(struct at_state_t *at_state, void *data)
{
struct bc_state *bcs = at_state->bcs;
unsigned proto;
const char *bc;
size_t length[AT_NUM];
size_t l;
int i;
struct setup_parm *sp = data;
switch (bcs->proto2) {
case ISDN_PROTO_L2_HDLC:
proto = 1; /* 0: Bitsynchron, 1: HDLC, 2: voice */
break;
case ISDN_PROTO_L2_TRANS:
proto = 2; /* 0: Bitsynchron, 1: HDLC, 2: voice */
break;
default:
dev_err(bcs->cs->dev, "%s: invalid L2 protocol: %u\n",
__func__, bcs->proto2);
return -EINVAL;
}
switch (sp->si1) {
case 1: /* audio */
bc = "9090A3"; /* 3.1 kHz audio, A-law */
break;
case 7: /* data */
default: /* hope the app knows what it is doing */
bc = "8890"; /* unrestricted digital information */
}
//FIXME add missing si1 values from 1TR6, inspect si2, set HLC/LLC
length[AT_DIAL ] = 1 + strlen(sp->phone) + 1 + 1;
l = strlen(sp->eazmsn);
length[AT_MSN ] = l ? 6 + l + 1 + 1 : 0;
length[AT_BC ] = 5 + strlen(bc) + 1 + 1;
length[AT_PROTO] = 6 + 1 + 1 + 1; /* proto: 1 character */
length[AT_ISO ] = 6 + 1 + 1 + 1; /* channel: 1 character */
length[AT_TYPE ] = 6 + 1 + 1 + 1; /* call type: 1 character */
length[AT_HLC ] = 0;
for (i = 0; i < AT_NUM; ++i) {
kfree(bcs->commands[i]);
bcs->commands[i] = NULL;
if (length[i] &&
!(bcs->commands[i] = kmalloc(length[i], GFP_ATOMIC))) {
dev_err(bcs->cs->dev, "out of memory\n");
return -ENOMEM;
}
}
/* type = 1: extern, 0: intern, 2: recall, 3: door, 4: centrex */
if (sp->phone[0] == '*' && sp->phone[1] == '*') {
/* internal call: translate ** prefix to CTP value */
snprintf(bcs->commands[AT_DIAL], length[AT_DIAL],
"D%s\r", sp->phone+2);
strncpy(bcs->commands[AT_TYPE], "^SCTP=0\r", length[AT_TYPE]);
} else {
snprintf(bcs->commands[AT_DIAL], length[AT_DIAL],
"D%s\r", sp->phone);
strncpy(bcs->commands[AT_TYPE], "^SCTP=1\r", length[AT_TYPE]);
}
if (bcs->commands[AT_MSN])
snprintf(bcs->commands[AT_MSN], length[AT_MSN],
"^SMSN=%s\r", sp->eazmsn);
snprintf(bcs->commands[AT_BC ], length[AT_BC ],
"^SBC=%s\r", bc);
snprintf(bcs->commands[AT_PROTO], length[AT_PROTO],
"^SBPR=%u\r", proto);
snprintf(bcs->commands[AT_ISO ], length[AT_ISO ],
"^SISO=%u\r", (unsigned)bcs->channel + 1);
return 0;
}
int gigaset_isdn_setup_accept(struct at_state_t *at_state)
{
unsigned proto;
size_t length[AT_NUM];
int i;
struct bc_state *bcs = at_state->bcs;
switch (bcs->proto2) {
case ISDN_PROTO_L2_HDLC:
proto = 1; /* 0: Bitsynchron, 1: HDLC, 2: voice */
break;
case ISDN_PROTO_L2_TRANS:
proto = 2; /* 0: Bitsynchron, 1: HDLC, 2: voice */
break;
default:
dev_err(at_state->cs->dev, "%s: invalid protocol: %u\n",
__func__, bcs->proto2);
return -EINVAL;
}
length[AT_DIAL ] = 0;
length[AT_MSN ] = 0;
length[AT_BC ] = 0;
length[AT_PROTO] = 6 + 1 + 1 + 1; /* proto: 1 character */
length[AT_ISO ] = 6 + 1 + 1 + 1; /* channel: 1 character */
length[AT_TYPE ] = 0;
length[AT_HLC ] = 0;
for (i = 0; i < AT_NUM; ++i) {
kfree(bcs->commands[i]);
bcs->commands[i] = NULL;
if (length[i] &&
!(bcs->commands[i] = kmalloc(length[i], GFP_ATOMIC))) {
dev_err(at_state->cs->dev, "out of memory\n");
return -ENOMEM;
}
}
snprintf(bcs->commands[AT_PROTO], length[AT_PROTO],
"^SBPR=%u\r", proto);
snprintf(bcs->commands[AT_ISO ], length[AT_ISO ],
"^SISO=%u\r", (unsigned) bcs->channel + 1);
return 0;
iif->statcallb(&command);
}
/**
@ -482,6 +467,7 @@ int gigaset_isdn_icall(struct at_state_t *at_state)
{
struct cardstate *cs = at_state->cs;
struct bc_state *bcs = at_state->bcs;
isdn_if *iif = cs->iif;
isdn_ctrl response;
int retval;
@ -531,7 +517,7 @@ int gigaset_isdn_icall(struct at_state_t *at_state)
response.arg = bcs->channel; //FIXME
}
response.driver = cs->myid;
retval = cs->iif.statcallb(&response);
retval = iif->statcallb(&response);
gig_dbg(DEBUG_CMD, "Response: %d", retval);
switch (retval) {
case 0: /* no takers */
@ -560,16 +546,109 @@ int gigaset_isdn_icall(struct at_state_t *at_state)
}
}
/* Set Callback function pointer */
int gigaset_register_to_LL(struct cardstate *cs, const char *isdnid)
/**
* gigaset_isdn_connD() - signal D channel connect
* @bcs: B channel descriptor structure.
*
* Called by main module to notify the LL that the D channel connection has
* been established.
*/
void gigaset_isdn_connD(struct bc_state *bcs)
{
isdn_if *iif = &cs->iif;
gig_dbg(DEBUG_CMD, "sending DCONN");
gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN);
}
gig_dbg(DEBUG_ANY, "Register driver capabilities to LL");
/**
* gigaset_isdn_hupD() - signal D channel hangup
* @bcs: B channel descriptor structure.
*
* Called by main module to notify the LL that the D channel connection has
* been shut down.
*/
void gigaset_isdn_hupD(struct bc_state *bcs)
{
gig_dbg(DEBUG_CMD, "sending DHUP");
gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DHUP);
}
/**
* gigaset_isdn_connB() - signal B channel connect
* @bcs: B channel descriptor structure.
*
* Called by main module to notify the LL that the B channel connection has
* been established.
*/
void gigaset_isdn_connB(struct bc_state *bcs)
{
gig_dbg(DEBUG_CMD, "sending BCONN");
gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BCONN);
}
/**
* gigaset_isdn_hupB() - signal B channel hangup
* @bcs: B channel descriptor structure.
*
* Called by main module to notify the LL that the B channel connection has
* been shut down.
*/
void gigaset_isdn_hupB(struct bc_state *bcs)
{
gig_dbg(DEBUG_CMD, "sending BHUP");
gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BHUP);
}
/**
* gigaset_isdn_start() - signal device availability
* @cs: device descriptor structure.
*
* Called by main module to notify the LL that the device is available for
* use.
*/
void gigaset_isdn_start(struct cardstate *cs)
{
gig_dbg(DEBUG_CMD, "sending RUN");
gigaset_i4l_cmd(cs, ISDN_STAT_RUN);
}
/**
* gigaset_isdn_stop() - signal device unavailability
* @cs: device descriptor structure.
*
* Called by main module to notify the LL that the device is no longer
* available for use.
*/
void gigaset_isdn_stop(struct cardstate *cs)
{
gig_dbg(DEBUG_CMD, "sending STOP");
gigaset_i4l_cmd(cs, ISDN_STAT_STOP);
}
/**
* gigaset_isdn_register() - register to LL
* @cs: device descriptor structure.
* @isdnid: device name.
*
* Called by main module to register the device with the LL.
*
* Return value: 1 for success, 0 for failure
*/
int gigaset_isdn_register(struct cardstate *cs, const char *isdnid)
{
isdn_if *iif;
pr_info("ISDN4Linux interface\n");
iif = kmalloc(sizeof *iif, GFP_KERNEL);
if (!iif) {
pr_err("out of memory\n");
return 0;
}
if (snprintf(iif->id, sizeof iif->id, "%s_%u", isdnid, cs->minor_index)
>= sizeof iif->id) {
pr_err("ID too long: %s\n", isdnid);
kfree(iif);
return 0;
}
@ -593,9 +672,26 @@ int gigaset_register_to_LL(struct cardstate *cs, const char *isdnid)
if (!register_isdn(iif)) {
pr_err("register_isdn failed\n");
kfree(iif);
return 0;
}
cs->iif = iif;
cs->myid = iif->channels; /* Set my device id */
cs->hw_hdr_len = HW_HDR_LEN;
return 1;
}
/**
* gigaset_isdn_unregister() - unregister from LL
* @cs: device descriptor structure.
*
* Called by main module to unregister the device from the LL.
*/
void gigaset_isdn_unregister(struct cardstate *cs)
{
gig_dbg(DEBUG_CMD, "sending UNLOAD");
gigaset_i4l_cmd(cs, ISDN_STAT_UNLOAD);
kfree(cs->iif);
cs->iif = NULL;
}

79
drivers/isdn/gigaset/isocdata.c
View File

@ -500,7 +500,7 @@ int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len)
int result;
switch (bcs->proto2) {
case ISDN_PROTO_L2_HDLC:
case L2_HDLC:
result = hdlc_buildframe(bcs->hw.bas->isooutbuf, in, len);
gig_dbg(DEBUG_ISO, "%s: %d bytes HDLC -> %d",
__func__, len, result);
@ -542,8 +542,9 @@ static inline void hdlc_flush(struct bc_state *bcs)
if (likely(bcs->skb != NULL))
skb_trim(bcs->skb, 0);
else if (!bcs->ignore) {
if ((bcs->skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN)) != NULL)
skb_reserve(bcs->skb, HW_HDR_LEN);
bcs->skb = dev_alloc_skb(SBUFSIZE + bcs->cs->hw_hdr_len);
if (bcs->skb)
skb_reserve(bcs->skb, bcs->cs->hw_hdr_len);
else
dev_err(bcs->cs->dev, "could not allocate skb\n");
}
@ -557,7 +558,9 @@ static inline void hdlc_flush(struct bc_state *bcs)
*/
static inline void hdlc_done(struct bc_state *bcs)
{
struct cardstate *cs = bcs->cs;
struct sk_buff *procskb;
unsigned int len;
if (unlikely(bcs->ignore)) {
bcs->ignore--;
@ -568,32 +571,33 @@ static inline void hdlc_done(struct bc_state *bcs)
if ((procskb = bcs->skb) == NULL) {
/* previous error */
gig_dbg(DEBUG_ISO, "%s: skb=NULL", __func__);
gigaset_rcv_error(NULL, bcs->cs, bcs);
gigaset_isdn_rcv_err(bcs);
} else if (procskb->len < 2) {
dev_notice(bcs->cs->dev, "received short frame (%d octets)\n",
dev_notice(cs->dev, "received short frame (%d octets)\n",
procskb->len);
bcs->hw.bas->runts++;
gigaset_rcv_error(procskb, bcs->cs, bcs);
dev_kfree_skb(procskb);
gigaset_isdn_rcv_err(bcs);
} else if (bcs->fcs != PPP_GOODFCS) {
dev_notice(bcs->cs->dev, "frame check error (0x%04x)\n",
bcs->fcs);
dev_notice(cs->dev, "frame check error (0x%04x)\n", bcs->fcs);
bcs->hw.bas->fcserrs++;
gigaset_rcv_error(procskb, bcs->cs, bcs);
dev_kfree_skb(procskb);
gigaset_isdn_rcv_err(bcs);
} else {
procskb->len -= 2; /* subtract FCS */
procskb->tail -= 2;
gig_dbg(DEBUG_ISO, "%s: good frame (%d octets)",
__func__, procskb->len);
len = procskb->len;
__skb_trim(procskb, len -= 2); /* subtract FCS */
gig_dbg(DEBUG_ISO, "%s: good frame (%d octets)", __func__, len);
dump_bytes(DEBUG_STREAM_DUMP,
"rcv data", procskb->data, procskb->len);
bcs->hw.bas->goodbytes += procskb->len;
gigaset_rcv_skb(procskb, bcs->cs, bcs);
"rcv data", procskb->data, len);
bcs->hw.bas->goodbytes += len;
gigaset_skb_rcvd(bcs, procskb);
}
if ((bcs->skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN)) != NULL)
skb_reserve(bcs->skb, HW_HDR_LEN);
bcs->skb = dev_alloc_skb(SBUFSIZE + cs->hw_hdr_len);
if (bcs->skb)
skb_reserve(bcs->skb, cs->hw_hdr_len);
else
dev_err(bcs->cs->dev, "could not allocate skb\n");
dev_err(cs->dev, "could not allocate skb\n");
bcs->fcs = PPP_INITFCS;
}
@ -610,12 +614,8 @@ static inline void hdlc_frag(struct bc_state *bcs, unsigned inbits)
dev_notice(bcs->cs->dev, "received partial byte (%d bits)\n", inbits);
bcs->hw.bas->alignerrs++;
gigaset_rcv_error(bcs->skb, bcs->cs, bcs);
if ((bcs->skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN)) != NULL)
skb_reserve(bcs->skb, HW_HDR_LEN);
else
dev_err(bcs->cs->dev, "could not allocate skb\n");
gigaset_isdn_rcv_err(bcs);
__skb_trim(bcs->skb, 0);
bcs->fcs = PPP_INITFCS;
}
@ -648,8 +648,8 @@ static const unsigned char bitcounts[256] = {
/* hdlc_unpack
* perform HDLC frame processing (bit unstuffing, flag detection, FCS calculation)
* on a sequence of received data bytes (8 bits each, LSB first)
* pass on successfully received, complete frames as SKBs via gigaset_rcv_skb
* notify of errors via gigaset_rcv_error
* pass on successfully received, complete frames as SKBs via gigaset_skb_rcvd
* notify of errors via gigaset_isdn_rcv_err
* tally frames, errors etc. in BC structure counters
* parameters:
* src received data
@ -841,7 +841,7 @@ static inline void hdlc_unpack(unsigned char *src, unsigned count,
}
/* trans_receive
* pass on received USB frame transparently as SKB via gigaset_rcv_skb
* pass on received USB frame transparently as SKB via gigaset_skb_rcvd
* invert bytes
* tally frames, errors etc. in BC structure counters
* parameters:
@ -852,6 +852,7 @@ static inline void hdlc_unpack(unsigned char *src, unsigned count,
static inline void trans_receive(unsigned char *src, unsigned count,
struct bc_state *bcs)
{
struct cardstate *cs = bcs->cs;
struct sk_buff *skb;
int dobytes;
unsigned char *dst;
@ -862,12 +863,12 @@ static inline void trans_receive(unsigned char *src, unsigned count,
return;
}
if (unlikely((skb = bcs->skb) == NULL)) {
bcs->skb = skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN);
bcs->skb = skb = dev_alloc_skb(SBUFSIZE + cs->hw_hdr_len);
if (!skb) {
dev_err(bcs->cs->dev, "could not allocate skb\n");
dev_err(cs->dev, "could not allocate skb\n");
return;
}
skb_reserve(skb, HW_HDR_LEN);
skb_reserve(skb, cs->hw_hdr_len);
}
bcs->hw.bas->goodbytes += skb->len;
dobytes = TRANSBUFSIZE - skb->len;
@ -881,14 +882,14 @@ static inline void trans_receive(unsigned char *src, unsigned count,
if (dobytes == 0) {
dump_bytes(DEBUG_STREAM_DUMP,
"rcv data", skb->data, skb->len);
gigaset_rcv_skb(skb, bcs->cs, bcs);
bcs->skb = skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN);
gigaset_skb_rcvd(bcs, skb);
bcs->skb = skb =
dev_alloc_skb(SBUFSIZE + cs->hw_hdr_len);
if (!skb) {
dev_err(bcs->cs->dev,
"could not allocate skb\n");
dev_err(cs->dev, "could not allocate skb\n");
return;
}
skb_reserve(bcs->skb, HW_HDR_LEN);
skb_reserve(skb, cs->hw_hdr_len);
dobytes = TRANSBUFSIZE;
}
}
@ -897,7 +898,7 @@ static inline void trans_receive(unsigned char *src, unsigned count,
void gigaset_isoc_receive(unsigned char *src, unsigned count, struct bc_state *bcs)
{
switch (bcs->proto2) {
case ISDN_PROTO_L2_HDLC:
case L2_HDLC:
hdlc_unpack(src, count, bcs);
break;
default: /* assume transparent */
@ -981,8 +982,10 @@ void gigaset_isoc_input(struct inbuf_t *inbuf)
* @bcs: B channel descriptor structure.
* @skb: data to send.
*
* Called by i4l.c to queue an skb for sending, and start transmission if
* Called by LL to queue an skb for sending, and start transmission if
* necessary.
* Once the payload data has been transmitted completely, gigaset_skb_sent()
* will be called with the first cs->hw_hdr_len bytes of skb->head preserved.
*
* Return value:
* number of bytes accepted for sending (skb->len) if ok,