130 	struct gsm_mux *gsm;  member
231 	void (*receive)(struct gsm_mux *gsm, u8 ch);
232 	void (*error)(struct gsm_mux *gsm, u8 ch, u8 flag);
572 static void gsm_send(struct gsm_mux *gsm, int addr, int cr, int control)  in gsm_send()  argument
578 	switch (gsm->encoding) {  in gsm_send()
606 	gsm->output(gsm, cbuf, len);  in gsm_send()
619 static inline void gsm_response(struct gsm_mux *gsm, int addr, int control)  in gsm_response()  argument
621 	gsm_send(gsm, addr, 0, control);  in gsm_response()
633 static inline void gsm_command(struct gsm_mux *gsm, int addr, int control)  in gsm_command()  argument
635 	gsm_send(gsm, addr, 1, control);  in gsm_command()
654 static struct gsm_msg *gsm_data_alloc(struct gsm_mux *gsm, u8 addr, int len,  in gsm_data_alloc()  argument
681 static void gsm_data_kick(struct gsm_mux *gsm)  in gsm_data_kick()  argument
687 	list_for_each_entry_safe(msg, nmsg, &gsm->tx_list, list) {  in gsm_data_kick()
688 		if (gsm->constipated && msg->addr)  in gsm_data_kick()
690 		if (gsm->encoding != 0) {  in gsm_data_kick()
691 			gsm->txframe[0] = GSM1_SOF;  in gsm_data_kick()
693 						gsm->txframe + 1, msg->len);  in gsm_data_kick()
694 			gsm->txframe[len + 1] = GSM1_SOF;  in gsm_data_kick()
697 			gsm->txframe[0] = GSM0_SOF;  in gsm_data_kick()
698 			memcpy(gsm->txframe + 1 , msg->data, msg->len);  in gsm_data_kick()
699 			gsm->txframe[msg->len + 1] = GSM0_SOF;  in gsm_data_kick()
706 					     gsm->txframe, len);  in gsm_data_kick()
708 		if (gsm->output(gsm, gsm->txframe + skip_sof,  in gsm_data_kick()
712 		gsm->tx_bytes -= msg->len;  in gsm_data_kick()
734 	struct gsm_mux *gsm = dlci->gsm;  in __gsm_data_queue()  local
739 	if (gsm->encoding == 0) {  in __gsm_data_queue()
749 	if (gsm->initiator)  in __gsm_data_queue()
759 	gsm_print_packet("Q> ", msg->addr, gsm->initiator, msg->ctrl,  in __gsm_data_queue()
768 	list_add_tail(&msg->list, &gsm->tx_list);  in __gsm_data_queue()
769 	gsm->tx_bytes += msg->len;  in __gsm_data_queue()
770 	gsm_data_kick(gsm);  in __gsm_data_queue()
786 	spin_lock_irqsave(&dlci->gsm->tx_lock, flags);  in gsm_data_queue()
788 	spin_unlock_irqrestore(&dlci->gsm->tx_lock, flags);  in gsm_data_queue()
803 static int gsm_dlci_data_output(struct gsm_mux *gsm, struct gsm_dlci *dlci)  in gsm_dlci_data_output()  argument
817 		if (len > gsm->mtu)  in gsm_dlci_data_output()
818 			len = gsm->mtu;  in gsm_dlci_data_output()
822 		msg = gsm_data_alloc(gsm, dlci->addr, size, gsm->ftype);  in gsm_dlci_data_output()
856 static int gsm_dlci_data_output_framed(struct gsm_mux *gsm,  in gsm_dlci_data_output_framed()  argument
879 	if (len > gsm->mtu) {  in gsm_dlci_data_output_framed()
886 		len = gsm->mtu;  in gsm_dlci_data_output_framed()
891 	msg = gsm_data_alloc(gsm, dlci->addr, size, gsm->ftype);  in gsm_dlci_data_output_framed()
930 static void gsm_dlci_data_sweep(struct gsm_mux *gsm)  in gsm_dlci_data_sweep()  argument
939 		if (gsm->tx_bytes > TX_THRESH_HI)  in gsm_dlci_data_sweep()
941 		dlci = gsm->dlci[i];  in gsm_dlci_data_sweep()
947 			len = gsm_dlci_data_output(gsm, dlci);  in gsm_dlci_data_sweep()
949 			len = gsm_dlci_data_output_framed(gsm, dlci);  in gsm_dlci_data_sweep()
975 	spin_lock_irqsave(&dlci->gsm->tx_lock, flags);  in gsm_dlci_data_kick()
977 	sweep = (dlci->gsm->tx_bytes < TX_THRESH_LO);  in gsm_dlci_data_kick()
978 	if (dlci->gsm->tx_bytes == 0) {  in gsm_dlci_data_kick()
980 			gsm_dlci_data_output_framed(dlci->gsm, dlci);  in gsm_dlci_data_kick()
982 			gsm_dlci_data_output(dlci->gsm, dlci);  in gsm_dlci_data_kick()
985 		gsm_dlci_data_sweep(dlci->gsm);  in gsm_dlci_data_kick()
986 	spin_unlock_irqrestore(&dlci->gsm->tx_lock, flags);  in gsm_dlci_data_kick()
1004 static void gsm_control_reply(struct gsm_mux *gsm, int cmd, u8 *data,  in gsm_control_reply()  argument
1008 	msg = gsm_data_alloc(gsm, 0, dlen + 2, gsm->ftype);  in gsm_control_reply()
1014 	gsm_data_queue(gsm->dlci[0], msg);  in gsm_control_reply()
1089 static void gsm_control_modem(struct gsm_mux *gsm, u8 *data, int clen)  in gsm_control_modem()  argument
1111 	if (addr == 0 || addr >= NUM_DLCI || gsm->dlci[addr] == NULL)  in gsm_control_modem()
1113 	dlci = gsm->dlci[addr];  in gsm_control_modem()
1136 	gsm_control_reply(gsm, CMD_MSC, data, clen);  in gsm_control_modem()
1150 static void gsm_control_rls(struct gsm_mux *gsm, u8 *data, int clen)  in gsm_control_rls()  argument
1169 	if (addr == 0 || addr >= NUM_DLCI || gsm->dlci[addr] == NULL)  in gsm_control_rls()
1176 	port = &gsm->dlci[addr]->port;  in gsm_control_rls()
1187 	gsm_control_reply(gsm, CMD_RLS, data, clen);  in gsm_control_rls()
1204 static void gsm_control_message(struct gsm_mux *gsm, unsigned int command,  in gsm_control_message()  argument
1212 		struct gsm_dlci *dlci = gsm->dlci[0];  in gsm_control_message()
1216 			gsm->dead = 1;  in gsm_control_message()
1223 		gsm_control_reply(gsm, CMD_TEST, data, clen);  in gsm_control_message()
1227 		gsm->constipated = 0;  in gsm_control_message()
1228 		gsm_control_reply(gsm, CMD_FCON, NULL, 0);  in gsm_control_message()
1230 		spin_lock_irqsave(&gsm->tx_lock, flags);  in gsm_control_message()
1231 		gsm_data_kick(gsm);  in gsm_control_message()
1232 		spin_unlock_irqrestore(&gsm->tx_lock, flags);  in gsm_control_message()
1236 		gsm->constipated = 1;  in gsm_control_message()
1237 		gsm_control_reply(gsm, CMD_FCOFF, NULL, 0);  in gsm_control_message()
1241 		gsm_control_modem(gsm, data, clen);  in gsm_control_message()
1245 		gsm_control_rls(gsm, data, clen);  in gsm_control_message()
1249 		gsm_control_reply(gsm, CMD_PSC, NULL, 0);  in gsm_control_message()
1258 		gsm_control_reply(gsm, CMD_NSC, buf, 1);  in gsm_control_message()
1276 static void gsm_control_response(struct gsm_mux *gsm, unsigned int command,  in gsm_control_response()  argument
1282 	spin_lock_irqsave(&gsm->control_lock, flags);  in gsm_control_response()
1284 	ctrl = gsm->pending_cmd;  in gsm_control_response()
1289 		del_timer(&gsm->t2_timer);  in gsm_control_response()
1290 		gsm->pending_cmd = NULL;  in gsm_control_response()
1295 		wake_up(&gsm->event);  in gsm_control_response()
1297 	spin_unlock_irqrestore(&gsm->control_lock, flags);  in gsm_control_response()
1308 static void gsm_control_transmit(struct gsm_mux *gsm, struct gsm_control *ctrl)  in gsm_control_transmit()  argument
1310 	struct gsm_msg *msg = gsm_data_alloc(gsm, 0, ctrl->len + 1, gsm->ftype);  in gsm_control_transmit()
1315 	gsm_data_queue(gsm->dlci[0], msg);  in gsm_control_transmit()
1331 	struct gsm_mux *gsm = (struct gsm_mux *)data;  in gsm_control_retransmit()  local
1334 	spin_lock_irqsave(&gsm->control_lock, flags);  in gsm_control_retransmit()
1335 	ctrl = gsm->pending_cmd;  in gsm_control_retransmit()
1337 		gsm->cretries--;  in gsm_control_retransmit()
1338 		if (gsm->cretries == 0) {  in gsm_control_retransmit()
1339 			gsm->pending_cmd = NULL;  in gsm_control_retransmit()
1342 			spin_unlock_irqrestore(&gsm->control_lock, flags);  in gsm_control_retransmit()
1343 			wake_up(&gsm->event);  in gsm_control_retransmit()
1346 		gsm_control_transmit(gsm, ctrl);  in gsm_control_retransmit()
1347 		mod_timer(&gsm->t2_timer, jiffies + gsm->t2 * HZ / 100);  in gsm_control_retransmit()
1349 	spin_unlock_irqrestore(&gsm->control_lock, flags);  in gsm_control_retransmit()
1364 static struct gsm_control *gsm_control_send(struct gsm_mux *gsm,  in gsm_control_send()  argument
1373 	wait_event(gsm->event, gsm->pending_cmd == NULL);  in gsm_control_send()
1374 	spin_lock_irqsave(&gsm->control_lock, flags);  in gsm_control_send()
1375 	if (gsm->pending_cmd != NULL) {  in gsm_control_send()
1376 		spin_unlock_irqrestore(&gsm->control_lock, flags);  in gsm_control_send()
1382 	gsm->pending_cmd = ctrl;  in gsm_control_send()
1383 	gsm->cretries = gsm->n2;  in gsm_control_send()
1384 	mod_timer(&gsm->t2_timer, jiffies + gsm->t2 * HZ / 100);  in gsm_control_send()
1385 	gsm_control_transmit(gsm, ctrl);  in gsm_control_send()
1386 	spin_unlock_irqrestore(&gsm->control_lock, flags);  in gsm_control_send()
1400 static int gsm_control_wait(struct gsm_mux *gsm, struct gsm_control *control)  in gsm_control_wait()  argument
1403 	wait_event(gsm->event, control->done == 1);  in gsm_control_wait()
1436 		dlci->gsm->dead = 1;  in gsm_dlci_close()
1437 	wake_up(&dlci->gsm->event);  in gsm_dlci_close()
1458 	wake_up(&dlci->gsm->event);  in gsm_dlci_open()
1475 	struct gsm_mux *gsm = dlci->gsm;  in gsm_dlci_t1()  local
1481 			gsm_command(dlci->gsm, dlci->addr, SABM|PF);  in gsm_dlci_t1()
1482 			mod_timer(&dlci->t1, jiffies + gsm->t1 * HZ / 100);  in gsm_dlci_t1()
1489 			gsm_command(dlci->gsm, dlci->addr, DISC|PF);  in gsm_dlci_t1()
1490 			mod_timer(&dlci->t1, jiffies + gsm->t1 * HZ / 100);  in gsm_dlci_t1()
1509 	struct gsm_mux *gsm = dlci->gsm;  in gsm_dlci_begin_open()  local
1512 	dlci->retries = gsm->n2;  in gsm_dlci_begin_open()
1514 	gsm_command(dlci->gsm, dlci->addr, SABM|PF);  in gsm_dlci_begin_open()
1515 	mod_timer(&dlci->t1, jiffies + gsm->t1 * HZ / 100);  in gsm_dlci_begin_open()
1531 	struct gsm_mux *gsm = dlci->gsm;  in gsm_dlci_begin_close()  local
1534 	dlci->retries = gsm->n2;  in gsm_dlci_begin_close()
1536 	gsm_command(dlci->gsm, dlci->addr, DISC|PF);  in gsm_dlci_begin_close()
1537 	mod_timer(&dlci->t1, jiffies + gsm->t1 * HZ / 100);  in gsm_dlci_begin_close()
1615 				gsm_control_message(dlci->gsm, command,  in gsm_dlci_command()
1618 				gsm_control_response(dlci->gsm, command,  in gsm_dlci_command()
1639 static struct gsm_dlci *gsm_dlci_alloc(struct gsm_mux *gsm, int addr)  in gsm_dlci_alloc()  argument
1658 	dlci->gsm = gsm;  in gsm_dlci_alloc()
1660 	dlci->adaption = gsm->adaption;  in gsm_dlci_alloc()
1666 	gsm->dlci[addr] = dlci;  in gsm_dlci_alloc()
1683 	dlci->gsm->dlci[dlci->addr] = NULL;  in gsm_dlci_free()
1742 static void gsm_queue(struct gsm_mux *gsm)  in gsm_queue()  argument
1750 	if ((gsm->control & ~PF) == UI)  in gsm_queue()
1751 		gsm->fcs = gsm_fcs_add_block(gsm->fcs, gsm->buf, gsm->len);  in gsm_queue()
1752 	if (gsm->encoding == 0) {  in gsm_queue()
1757 		gsm->fcs = gsm_fcs_add(gsm->fcs, gsm->received_fcs);  in gsm_queue()
1759 	if (gsm->fcs != GOOD_FCS) {  in gsm_queue()
1760 		gsm->bad_fcs++;  in gsm_queue()
1762 			pr_debug("BAD FCS %02x\n", gsm->fcs);  in gsm_queue()
1765 	address = gsm->address >> 1;  in gsm_queue()
1769 	cr = gsm->address & 1;		/* C/R bit */  in gsm_queue()
1771 	gsm_print_packet("<--", address, cr, gsm->control, gsm->buf, gsm->len);  in gsm_queue()
1773 	cr ^= 1 - gsm->initiator;	/* Flip so 1 always means command */  in gsm_queue()
1774 	dlci = gsm->dlci[address];  in gsm_queue()
1776 	switch (gsm->control) {  in gsm_queue()
1781 			dlci = gsm_dlci_alloc(gsm, address);  in gsm_queue()
1785 			gsm_response(gsm, address, DM);  in gsm_queue()
1787 			gsm_response(gsm, address, UA);  in gsm_queue()
1795 			gsm_response(gsm, address, DM);  in gsm_queue()
1799 		gsm_response(gsm, address, UA);  in gsm_queue()
1832 			gsm_command(gsm, address, DM|PF);  in gsm_queue()
1835 		dlci->data(dlci, gsm->buf, gsm->len);  in gsm_queue()
1842 	gsm->malformed++;  in gsm_queue()
1855 static void gsm0_receive(struct gsm_mux *gsm, unsigned char c)  in gsm0_receive()  argument
1859 	switch (gsm->state) {  in gsm0_receive()
1862 			gsm->state = GSM_ADDRESS;  in gsm0_receive()
1863 			gsm->address = 0;  in gsm0_receive()
1864 			gsm->len = 0;  in gsm0_receive()
1865 			gsm->fcs = INIT_FCS;  in gsm0_receive()
1869 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm0_receive()
1870 		if (gsm_read_ea(&gsm->address, c))  in gsm0_receive()
1871 			gsm->state = GSM_CONTROL;  in gsm0_receive()
1874 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm0_receive()
1875 		gsm->control = c;  in gsm0_receive()
1876 		gsm->state = GSM_LEN0;  in gsm0_receive()
1879 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm0_receive()
1880 		if (gsm_read_ea(&gsm->len, c)) {  in gsm0_receive()
1881 			if (gsm->len > gsm->mru) {  in gsm0_receive()
1882 				gsm->bad_size++;  in gsm0_receive()
1883 				gsm->state = GSM_SEARCH;  in gsm0_receive()
1886 			gsm->count = 0;  in gsm0_receive()
1887 			if (!gsm->len)  in gsm0_receive()
1888 				gsm->state = GSM_FCS;  in gsm0_receive()
1890 				gsm->state = GSM_DATA;  in gsm0_receive()
1893 		gsm->state = GSM_LEN1;  in gsm0_receive()
1896 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm0_receive()
1898 		gsm->len |= len << 7;  in gsm0_receive()
1899 		if (gsm->len > gsm->mru) {  in gsm0_receive()
1900 			gsm->bad_size++;  in gsm0_receive()
1901 			gsm->state = GSM_SEARCH;  in gsm0_receive()
1904 		gsm->count = 0;  in gsm0_receive()
1905 		if (!gsm->len)  in gsm0_receive()
1906 			gsm->state = GSM_FCS;  in gsm0_receive()
1908 			gsm->state = GSM_DATA;  in gsm0_receive()
1911 		gsm->buf[gsm->count++] = c;  in gsm0_receive()
1912 		if (gsm->count == gsm->len)  in gsm0_receive()
1913 			gsm->state = GSM_FCS;  in gsm0_receive()
1916 		gsm->received_fcs = c;  in gsm0_receive()
1917 		gsm_queue(gsm);  in gsm0_receive()
1918 		gsm->state = GSM_SSOF;  in gsm0_receive()
1922 			gsm->state = GSM_SEARCH;  in gsm0_receive()
1937 static void gsm1_receive(struct gsm_mux *gsm, unsigned char c)  in gsm1_receive()  argument
1942 		if (gsm->state == GSM_DATA && gsm->count) {  in gsm1_receive()
1944 			gsm->count--;  in gsm1_receive()
1945 			gsm->fcs = gsm_fcs_add(gsm->fcs, gsm->buf[gsm->count]);  in gsm1_receive()
1946 			gsm->len = gsm->count;  in gsm1_receive()
1947 			gsm_queue(gsm);  in gsm1_receive()
1948 			gsm->state  = GSM_START;  in gsm1_receive()
1952 		if (gsm->state != GSM_START) {  in gsm1_receive()
1953 			gsm->malformed++;  in gsm1_receive()
1954 			gsm->state = GSM_START;  in gsm1_receive()
1962 		gsm->escape = 1;  in gsm1_receive()
1967 	if (gsm->state == GSM_SEARCH)  in gsm1_receive()
1970 	if (gsm->escape) {  in gsm1_receive()
1972 		gsm->escape = 0;  in gsm1_receive()
1974 	switch (gsm->state) {  in gsm1_receive()
1976 		gsm->address = 0;  in gsm1_receive()
1977 		gsm->state = GSM_ADDRESS;  in gsm1_receive()
1978 		gsm->fcs = INIT_FCS;  in gsm1_receive()
1981 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm1_receive()
1982 		if (gsm_read_ea(&gsm->address, c))  in gsm1_receive()
1983 			gsm->state = GSM_CONTROL;  in gsm1_receive()
1986 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm1_receive()
1987 		gsm->control = c;  in gsm1_receive()
1988 		gsm->count = 0;  in gsm1_receive()
1989 		gsm->state = GSM_DATA;  in gsm1_receive()
1992 		if (gsm->count > gsm->mru) {	/* Allow one for the FCS */  in gsm1_receive()
1993 			gsm->state = GSM_OVERRUN;  in gsm1_receive()
1994 			gsm->bad_size++;  in gsm1_receive()
1996 			gsm->buf[gsm->count++] = c;  in gsm1_receive()
2015 static void gsm_error(struct gsm_mux *gsm,  in gsm_error()  argument
2018 	gsm->state = GSM_SEARCH;  in gsm_error()
2019 	gsm->io_error++;  in gsm_error()
2031 static void gsm_cleanup_mux(struct gsm_mux *gsm)  in gsm_cleanup_mux()  argument
2034 	struct gsm_dlci *dlci = gsm->dlci[0];  in gsm_cleanup_mux()
2038 	gsm->dead = 1;  in gsm_cleanup_mux()
2042 		if (gsm_mux[i] == gsm) {  in gsm_cleanup_mux()
2055 		gc = gsm_control_send(gsm, CMD_CLD, NULL, 0);  in gsm_cleanup_mux()
2057 			gsm_control_wait(gsm, gc);  in gsm_cleanup_mux()
2059 	del_timer_sync(&gsm->t2_timer);  in gsm_cleanup_mux()
2064 		wait_event_interruptible(gsm->event,  in gsm_cleanup_mux()
2068 	mutex_lock(&gsm->mutex);  in gsm_cleanup_mux()
2070 		if (gsm->dlci[i])  in gsm_cleanup_mux()
2071 			gsm_dlci_release(gsm->dlci[i]);  in gsm_cleanup_mux()
2072 	mutex_unlock(&gsm->mutex);  in gsm_cleanup_mux()
2074 	list_for_each_entry_safe(txq, ntxq, &gsm->tx_list, list)  in gsm_cleanup_mux()
2076 	INIT_LIST_HEAD(&gsm->tx_list);  in gsm_cleanup_mux()
2088 static int gsm_activate_mux(struct gsm_mux *gsm)  in gsm_activate_mux()  argument
2093 	setup_timer(&gsm->t2_timer, gsm_control_retransmit, (unsigned long)gsm);  in gsm_activate_mux()
2094 	init_waitqueue_head(&gsm->event);  in gsm_activate_mux()
2095 	spin_lock_init(&gsm->control_lock);  in gsm_activate_mux()
2096 	spin_lock_init(&gsm->tx_lock);  in gsm_activate_mux()
2098 	if (gsm->encoding == 0)  in gsm_activate_mux()
2099 		gsm->receive = gsm0_receive;  in gsm_activate_mux()
2101 		gsm->receive = gsm1_receive;  in gsm_activate_mux()
2102 	gsm->error = gsm_error;  in gsm_activate_mux()
2107 			gsm->num = i;  in gsm_activate_mux()
2108 			gsm_mux[i] = gsm;  in gsm_activate_mux()
2116 	dlci = gsm_dlci_alloc(gsm, 0);  in gsm_activate_mux()
2119 	gsm->dead = 0;		/* Tty opens are now permissible */  in gsm_activate_mux()
2129 static void gsm_free_mux(struct gsm_mux *gsm)  in gsm_free_mux()  argument
2131 	kfree(gsm->txframe);  in gsm_free_mux()
2132 	kfree(gsm->buf);  in gsm_free_mux()
2133 	kfree(gsm);  in gsm_free_mux()
2144 	struct gsm_mux *gsm = container_of(ref, struct gsm_mux, ref);  in gsm_free_muxr()  local
2145 	gsm_free_mux(gsm);  in gsm_free_muxr()
2148 static inline void mux_get(struct gsm_mux *gsm)  in mux_get()  argument
2150 	kref_get(&gsm->ref);  in mux_get()
2153 static inline void mux_put(struct gsm_mux *gsm)  in mux_put()  argument
2155 	kref_put(&gsm->ref, gsm_free_muxr);  in mux_put()
2166 	struct gsm_mux *gsm = kzalloc(sizeof(struct gsm_mux), GFP_KERNEL);  in gsm_alloc_mux()  local
2167 	if (gsm == NULL)  in gsm_alloc_mux()
2169 	gsm->buf = kmalloc(MAX_MRU + 1, GFP_KERNEL);  in gsm_alloc_mux()
2170 	if (gsm->buf == NULL) {  in gsm_alloc_mux()
2171 		kfree(gsm);  in gsm_alloc_mux()
2174 	gsm->txframe = kmalloc(2 * MAX_MRU + 2, GFP_KERNEL);  in gsm_alloc_mux()
2175 	if (gsm->txframe == NULL) {  in gsm_alloc_mux()
2176 		kfree(gsm->buf);  in gsm_alloc_mux()
2177 		kfree(gsm);  in gsm_alloc_mux()
2180 	spin_lock_init(&gsm->lock);  in gsm_alloc_mux()
2181 	mutex_init(&gsm->mutex);  in gsm_alloc_mux()
2182 	kref_init(&gsm->ref);  in gsm_alloc_mux()
2183 	INIT_LIST_HEAD(&gsm->tx_list);  in gsm_alloc_mux()
2185 	gsm->t1 = T1;  in gsm_alloc_mux()
2186 	gsm->t2 = T2;  in gsm_alloc_mux()
2187 	gsm->n2 = N2;  in gsm_alloc_mux()
2188 	gsm->ftype = UIH;  in gsm_alloc_mux()
2189 	gsm->adaption = 1;  in gsm_alloc_mux()
2190 	gsm->encoding = 1;  in gsm_alloc_mux()
2191 	gsm->mru = 64;	/* Default to encoding 1 so these should be 64 */  in gsm_alloc_mux()
2192 	gsm->mtu = 64;  in gsm_alloc_mux()
2193 	gsm->dead = 1;	/* Avoid early tty opens */  in gsm_alloc_mux()
2195 	return gsm;  in gsm_alloc_mux()
2208 static int gsmld_output(struct gsm_mux *gsm, u8 *data, int len)  in gsmld_output()  argument
2210 	if (tty_write_room(gsm->tty) < len) {  in gsmld_output()
2211 		set_bit(TTY_DO_WRITE_WAKEUP, &gsm->tty->flags);  in gsmld_output()
2217 	gsm->tty->ops->write(gsm->tty, data, len);  in gsmld_output()
2231 static int gsmld_attach_gsm(struct tty_struct *tty, struct gsm_mux *gsm)  in gsmld_attach_gsm()  argument
2235 	gsm->tty = tty_kref_get(tty);  in gsmld_attach_gsm()
2236 	gsm->output = gsmld_output;  in gsmld_attach_gsm()
2237 	ret =  gsm_activate_mux(gsm);  in gsmld_attach_gsm()
2239 		tty_kref_put(gsm->tty);  in gsmld_attach_gsm()
2243 		base = gsm->num << 6; /* Base for this MUX */  in gsmld_attach_gsm()
2259 static void gsmld_detach_gsm(struct tty_struct *tty, struct gsm_mux *gsm)  in gsmld_detach_gsm()  argument
2262 	int base = gsm->num << 6; /* Base for this MUX */  in gsmld_detach_gsm()
2264 	WARN_ON(tty != gsm->tty);  in gsmld_detach_gsm()
2267 	gsm_cleanup_mux(gsm);  in gsmld_detach_gsm()
2268 	tty_kref_put(gsm->tty);  in gsmld_detach_gsm()
2269 	gsm->tty = NULL;  in gsmld_detach_gsm()
2275 	struct gsm_mux *gsm = tty->disc_data;  in gsmld_receive_buf()  local
2291 			gsm->receive(gsm, *dp);  in gsmld_receive_buf()
2297 			gsm->error(gsm, *dp, flags);  in gsmld_receive_buf()
2349 	struct gsm_mux *gsm = tty->disc_data;  in gsmld_close()  local
2351 	gsmld_detach_gsm(tty, gsm);  in gsmld_close()
2355 	mux_put(gsm);  in gsmld_close()
2370 	struct gsm_mux *gsm;  in gsmld_open()  local
2377 	gsm = gsm_alloc_mux();  in gsmld_open()
2378 	if (gsm == NULL)  in gsmld_open()
2381 	tty->disc_data = gsm;  in gsmld_open()
2385 	gsm->encoding = 1;  in gsmld_open()
2387 	ret = gsmld_attach_gsm(tty, gsm);  in gsmld_open()
2389 		gsm_cleanup_mux(gsm);  in gsmld_open()
2390 		mux_put(gsm);  in gsmld_open()
2406 	struct gsm_mux *gsm = tty->disc_data;  in gsmld_write_wakeup()  local
2411 	spin_lock_irqsave(&gsm->tx_lock, flags);  in gsmld_write_wakeup()
2412 	gsm_data_kick(gsm);  in gsmld_write_wakeup()
2413 	if (gsm->tx_bytes < TX_THRESH_LO) {  in gsmld_write_wakeup()
2414 		gsm_dlci_data_sweep(gsm);  in gsmld_write_wakeup()
2416 	spin_unlock_irqrestore(&gsm->tx_lock, flags);  in gsmld_write_wakeup()
2482 	struct gsm_mux *gsm = tty->disc_data;  in gsmld_poll()  local
2490 	if (gsm->dead)  in gsmld_poll()
2495 static int gsmld_config(struct tty_struct *tty, struct gsm_mux *gsm,  in gsmld_config()  argument
2520 	if (c->t1 != 0 && c->t1 != gsm->t1)  in gsmld_config()
2522 	if (c->t2 != 0 && c->t2 != gsm->t2)  in gsmld_config()
2524 	if (c->encapsulation != gsm->encoding)  in gsmld_config()
2526 	if (c->adaption != gsm->adaption)  in gsmld_config()
2529 	if (c->initiator != gsm->initiator)  in gsmld_config()
2531 	if (c->mru != gsm->mru)  in gsmld_config()
2533 	if (c->mtu != gsm->mtu)  in gsmld_config()
2542 		gsm_dlci_begin_close(gsm->dlci[0]);  in gsmld_config()
2544 		wait_event_interruptible(gsm->event,  in gsmld_config()
2545 				gsm->dlci[0]->state == DLCI_CLOSED);  in gsmld_config()
2550 		gsm_cleanup_mux(gsm);  in gsmld_config()
2552 	gsm->initiator = c->initiator;  in gsmld_config()
2553 	gsm->mru = c->mru;  in gsmld_config()
2554 	gsm->mtu = c->mtu;  in gsmld_config()
2555 	gsm->encoding = c->encapsulation;  in gsmld_config()
2556 	gsm->adaption = c->adaption;  in gsmld_config()
2557 	gsm->n2 = c->n2;  in gsmld_config()
2560 		gsm->ftype = UIH;  in gsmld_config()
2562 		gsm->ftype = UI;  in gsmld_config()
2565 		gsm->t1 = c->t1;  in gsmld_config()
2567 		gsm->t2 = c->t2;  in gsmld_config()
2572 		gsm_activate_mux(gsm);  in gsmld_config()
2573 	if (gsm->initiator && need_close)  in gsmld_config()
2574 		gsm_dlci_begin_open(gsm->dlci[0]);  in gsmld_config()
2582 	struct gsm_mux *gsm = tty->disc_data;  in gsmld_ioctl()  local
2587 		c.adaption = gsm->adaption;  in gsmld_ioctl()
2588 		c.encapsulation = gsm->encoding;  in gsmld_ioctl()
2589 		c.initiator = gsm->initiator;  in gsmld_ioctl()
2590 		c.t1 = gsm->t1;  in gsmld_ioctl()
2591 		c.t2 = gsm->t2;  in gsmld_ioctl()
2593 		c.n2 = gsm->n2;  in gsmld_ioctl()
2594 		if (gsm->ftype == UIH)  in gsmld_ioctl()
2598 		pr_debug("Ftype %d i %d\n", gsm->ftype, c.i);  in gsmld_ioctl()
2599 		c.mru = gsm->mru;  in gsmld_ioctl()
2600 		c.mtu = gsm->mtu;  in gsmld_ioctl()
2608 		return gsmld_config(tty, gsm, &c);  in gsmld_ioctl()
2733 	if ((new_mtu < 8) || (new_mtu > mux_net->dlci->gsm->mtu))  in gsm_change_mtu()
2805 	net->mtu = dlci->gsm->mtu;  in gsm_create_network()
2865 	ctrl = gsm_control_send(dlci->gsm, CMD_MSC, modembits, len + 1);  in gsmtty_modem_update()
2868 	return gsm_control_wait(dlci->gsm, ctrl);  in gsmtty_modem_update()
2904 	struct gsm_mux *gsm;  in gsmtty_install()  local
2920 	gsm = gsm_mux[mux];  in gsmtty_install()
2921 	if (gsm->dead)  in gsmtty_install()
2927 	mutex_lock(&gsm->mutex);  in gsmtty_install()
2928 	if (gsm->dlci[0] && gsm->dlci[0]->state != DLCI_OPEN) {  in gsmtty_install()
2929 		mutex_unlock(&gsm->mutex);  in gsmtty_install()
2932 	dlci = gsm->dlci[line];  in gsmtty_install()
2935 		dlci = gsm_dlci_alloc(gsm, line);  in gsmtty_install()
2938 		mutex_unlock(&gsm->mutex);  in gsmtty_install()
2945 		mutex_unlock(&gsm->mutex);  in gsmtty_install()
2950 	dlci_get(gsm->dlci[0]);  in gsmtty_install()
2951 	mux_get(gsm);  in gsmtty_install()
2953 	mutex_unlock(&gsm->mutex);  in gsmtty_install()
2979 	struct gsm_mux *gsm;  in gsmtty_close()  local
2988 	gsm = dlci->gsm;  in gsmtty_close()
3178 	struct gsm_mux *gsm = dlci->gsm;  in gsmtty_cleanup()  local
3181 	dlci_put(gsm->dlci[0]);  in gsmtty_cleanup()
3182 	mux_put(gsm);  in gsmtty_cleanup()