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path: root/drivers/char/pcmcia/synclink_cs.c
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Diffstat (limited to 'drivers/char/pcmcia/synclink_cs.c')
-rw-r--r--drivers/char/pcmcia/synclink_cs.c479
1 files changed, 181 insertions, 298 deletions
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 4d64a02612a4..dc073e167abc 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -138,20 +138,15 @@ struct _input_signal_events {
138 */ 138 */
139 139
140typedef struct _mgslpc_info { 140typedef struct _mgslpc_info {
141 struct tty_port port;
141 void *if_ptr; /* General purpose pointer (used by SPPP) */ 142 void *if_ptr; /* General purpose pointer (used by SPPP) */
142 int magic; 143 int magic;
143 int flags;
144 int count; /* count of opens */
145 int line; 144 int line;
146 unsigned short close_delay;
147 unsigned short closing_wait; /* time to wait before closing */
148 145
149 struct mgsl_icount icount; 146 struct mgsl_icount icount;
150 147
151 struct tty_struct *tty;
152 int timeout; 148 int timeout;
153 int x_char; /* xon/xoff character */ 149 int x_char; /* xon/xoff character */
154 int blocked_open; /* # of blocked opens */
155 unsigned char read_status_mask; 150 unsigned char read_status_mask;
156 unsigned char ignore_status_mask; 151 unsigned char ignore_status_mask;
157 152
@@ -170,9 +165,6 @@ typedef struct _mgslpc_info {
170 int rx_buf_count; /* total number of rx buffers */ 165 int rx_buf_count; /* total number of rx buffers */
171 int rx_frame_count; /* number of full rx buffers */ 166 int rx_frame_count; /* number of full rx buffers */
172 167
173 wait_queue_head_t open_wait;
174 wait_queue_head_t close_wait;
175
176 wait_queue_head_t status_event_wait_q; 168 wait_queue_head_t status_event_wait_q;
177 wait_queue_head_t event_wait_q; 169 wait_queue_head_t event_wait_q;
178 struct timer_list tx_timer; /* HDLC transmit timeout timer */ 170 struct timer_list tx_timer; /* HDLC transmit timeout timer */
@@ -375,7 +367,7 @@ static void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short
375static void rx_start(MGSLPC_INFO *info); 367static void rx_start(MGSLPC_INFO *info);
376static void rx_stop(MGSLPC_INFO *info); 368static void rx_stop(MGSLPC_INFO *info);
377 369
378static void tx_start(MGSLPC_INFO *info); 370static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty);
379static void tx_stop(MGSLPC_INFO *info); 371static void tx_stop(MGSLPC_INFO *info);
380static void tx_set_idle(MGSLPC_INFO *info); 372static void tx_set_idle(MGSLPC_INFO *info);
381 373
@@ -389,7 +381,8 @@ static void async_mode(MGSLPC_INFO *info);
389 381
390static void tx_timeout(unsigned long context); 382static void tx_timeout(unsigned long context);
391 383
392static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg); 384static int carrier_raised(struct tty_port *port);
385static void raise_dtr_rts(struct tty_port *port);
393 386
394#if SYNCLINK_GENERIC_HDLC 387#if SYNCLINK_GENERIC_HDLC
395#define dev_to_port(D) (dev_to_hdlc(D)->priv) 388#define dev_to_port(D) (dev_to_hdlc(D)->priv)
@@ -410,7 +403,7 @@ static void release_resources(MGSLPC_INFO *info);
410static void mgslpc_add_device(MGSLPC_INFO *info); 403static void mgslpc_add_device(MGSLPC_INFO *info);
411static void mgslpc_remove_device(MGSLPC_INFO *info); 404static void mgslpc_remove_device(MGSLPC_INFO *info);
412 405
413static bool rx_get_frame(MGSLPC_INFO *info); 406static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty);
414static void rx_reset_buffers(MGSLPC_INFO *info); 407static void rx_reset_buffers(MGSLPC_INFO *info);
415static int rx_alloc_buffers(MGSLPC_INFO *info); 408static int rx_alloc_buffers(MGSLPC_INFO *info);
416static void rx_free_buffers(MGSLPC_INFO *info); 409static void rx_free_buffers(MGSLPC_INFO *info);
@@ -421,7 +414,7 @@ static irqreturn_t mgslpc_isr(int irq, void *dev_id);
421 * Bottom half interrupt handlers 414 * Bottom half interrupt handlers
422 */ 415 */
423static void bh_handler(struct work_struct *work); 416static void bh_handler(struct work_struct *work);
424static void bh_transmit(MGSLPC_INFO *info); 417static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty);
425static void bh_status(MGSLPC_INFO *info); 418static void bh_status(MGSLPC_INFO *info);
426 419
427/* 420/*
@@ -432,10 +425,10 @@ static int tiocmset(struct tty_struct *tty, struct file *file,
432 unsigned int set, unsigned int clear); 425 unsigned int set, unsigned int clear);
433static int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount); 426static int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount);
434static int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params); 427static int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params);
435static int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params); 428static int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params, struct tty_struct *tty);
436static int get_txidle(MGSLPC_INFO *info, int __user *idle_mode); 429static int get_txidle(MGSLPC_INFO *info, int __user *idle_mode);
437static int set_txidle(MGSLPC_INFO *info, int idle_mode); 430static int set_txidle(MGSLPC_INFO *info, int idle_mode);
438static int set_txenable(MGSLPC_INFO *info, int enable); 431static int set_txenable(MGSLPC_INFO *info, int enable, struct tty_struct *tty);
439static int tx_abort(MGSLPC_INFO *info); 432static int tx_abort(MGSLPC_INFO *info);
440static int set_rxenable(MGSLPC_INFO *info, int enable); 433static int set_rxenable(MGSLPC_INFO *info, int enable);
441static int wait_events(MGSLPC_INFO *info, int __user *mask); 434static int wait_events(MGSLPC_INFO *info, int __user *mask);
@@ -474,7 +467,7 @@ static struct tty_driver *serial_driver;
474/* number of characters left in xmit buffer before we ask for more */ 467/* number of characters left in xmit buffer before we ask for more */
475#define WAKEUP_CHARS 256 468#define WAKEUP_CHARS 256
476 469
477static void mgslpc_change_params(MGSLPC_INFO *info); 470static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty);
478static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout); 471static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout);
479 472
480/* PCMCIA prototypes */ 473/* PCMCIA prototypes */
@@ -517,6 +510,11 @@ static void ldisc_receive_buf(struct tty_struct *tty,
517 } 510 }
518} 511}
519 512
513static const struct tty_port_operations mgslpc_port_ops = {
514 .carrier_raised = carrier_raised,
515 .raise_dtr_rts = raise_dtr_rts
516};
517
520static int mgslpc_probe(struct pcmcia_device *link) 518static int mgslpc_probe(struct pcmcia_device *link)
521{ 519{
522 MGSLPC_INFO *info; 520 MGSLPC_INFO *info;
@@ -532,12 +530,12 @@ static int mgslpc_probe(struct pcmcia_device *link)
532 } 530 }
533 531
534 info->magic = MGSLPC_MAGIC; 532 info->magic = MGSLPC_MAGIC;
533 tty_port_init(&info->port);
534 info->port.ops = &mgslpc_port_ops;
535 INIT_WORK(&info->task, bh_handler); 535 INIT_WORK(&info->task, bh_handler);
536 info->max_frame_size = 4096; 536 info->max_frame_size = 4096;
537 info->close_delay = 5*HZ/10; 537 info->port.close_delay = 5*HZ/10;
538 info->closing_wait = 30*HZ; 538 info->port.closing_wait = 30*HZ;
539 init_waitqueue_head(&info->open_wait);
540 init_waitqueue_head(&info->close_wait);
541 init_waitqueue_head(&info->status_event_wait_q); 539 init_waitqueue_head(&info->status_event_wait_q);
542 init_waitqueue_head(&info->event_wait_q); 540 init_waitqueue_head(&info->event_wait_q);
543 spin_lock_init(&info->lock); 541 spin_lock_init(&info->lock);
@@ -784,7 +782,7 @@ static void tx_release(struct tty_struct *tty)
784 782
785 spin_lock_irqsave(&info->lock,flags); 783 spin_lock_irqsave(&info->lock,flags);
786 if (!info->tx_enabled) 784 if (!info->tx_enabled)
787 tx_start(info); 785 tx_start(info, tty);
788 spin_unlock_irqrestore(&info->lock,flags); 786 spin_unlock_irqrestore(&info->lock,flags);
789} 787}
790 788
@@ -823,6 +821,7 @@ static int bh_action(MGSLPC_INFO *info)
823static void bh_handler(struct work_struct *work) 821static void bh_handler(struct work_struct *work)
824{ 822{
825 MGSLPC_INFO *info = container_of(work, MGSLPC_INFO, task); 823 MGSLPC_INFO *info = container_of(work, MGSLPC_INFO, task);
824 struct tty_struct *tty;
826 int action; 825 int action;
827 826
828 if (!info) 827 if (!info)
@@ -833,6 +832,7 @@ static void bh_handler(struct work_struct *work)
833 __FILE__,__LINE__,info->device_name); 832 __FILE__,__LINE__,info->device_name);
834 833
835 info->bh_running = true; 834 info->bh_running = true;
835 tty = tty_port_tty_get(&info->port);
836 836
837 while((action = bh_action(info)) != 0) { 837 while((action = bh_action(info)) != 0) {
838 838
@@ -844,10 +844,10 @@ static void bh_handler(struct work_struct *work)
844 switch (action) { 844 switch (action) {
845 845
846 case BH_RECEIVE: 846 case BH_RECEIVE:
847 while(rx_get_frame(info)); 847 while(rx_get_frame(info, tty));
848 break; 848 break;
849 case BH_TRANSMIT: 849 case BH_TRANSMIT:
850 bh_transmit(info); 850 bh_transmit(info, tty);
851 break; 851 break;
852 case BH_STATUS: 852 case BH_STATUS:
853 bh_status(info); 853 bh_status(info);
@@ -859,14 +859,14 @@ static void bh_handler(struct work_struct *work)
859 } 859 }
860 } 860 }
861 861
862 tty_kref_put(tty);
862 if (debug_level >= DEBUG_LEVEL_BH) 863 if (debug_level >= DEBUG_LEVEL_BH)
863 printk( "%s(%d):bh_handler(%s) exit\n", 864 printk( "%s(%d):bh_handler(%s) exit\n",
864 __FILE__,__LINE__,info->device_name); 865 __FILE__,__LINE__,info->device_name);
865} 866}
866 867
867static void bh_transmit(MGSLPC_INFO *info) 868static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty)
868{ 869{
869 struct tty_struct *tty = info->tty;
870 if (debug_level >= DEBUG_LEVEL_BH) 870 if (debug_level >= DEBUG_LEVEL_BH)
871 printk("bh_transmit() entry on %s\n", info->device_name); 871 printk("bh_transmit() entry on %s\n", info->device_name);
872 872
@@ -945,12 +945,11 @@ static void rx_ready_hdlc(MGSLPC_INFO *info, int eom)
945 issue_command(info, CHA, CMD_RXFIFO); 945 issue_command(info, CHA, CMD_RXFIFO);
946} 946}
947 947
948static void rx_ready_async(MGSLPC_INFO *info, int tcd) 948static void rx_ready_async(MGSLPC_INFO *info, int tcd, struct tty_struct *tty)
949{ 949{
950 unsigned char data, status, flag; 950 unsigned char data, status, flag;
951 int fifo_count; 951 int fifo_count;
952 int work = 0; 952 int work = 0;
953 struct tty_struct *tty = info->tty;
954 struct mgsl_icount *icount = &info->icount; 953 struct mgsl_icount *icount = &info->icount;
955 954
956 if (tcd) { 955 if (tcd) {
@@ -1013,7 +1012,7 @@ static void rx_ready_async(MGSLPC_INFO *info, int tcd)
1013} 1012}
1014 1013
1015 1014
1016static void tx_done(MGSLPC_INFO *info) 1015static void tx_done(MGSLPC_INFO *info, struct tty_struct *tty)
1017{ 1016{
1018 if (!info->tx_active) 1017 if (!info->tx_active)
1019 return; 1018 return;
@@ -1042,7 +1041,7 @@ static void tx_done(MGSLPC_INFO *info)
1042 else 1041 else
1043#endif 1042#endif
1044 { 1043 {
1045 if (info->tty->stopped || info->tty->hw_stopped) { 1044 if (tty->stopped || tty->hw_stopped) {
1046 tx_stop(info); 1045 tx_stop(info);
1047 return; 1046 return;
1048 } 1047 }
@@ -1050,7 +1049,7 @@ static void tx_done(MGSLPC_INFO *info)
1050 } 1049 }
1051} 1050}
1052 1051
1053static void tx_ready(MGSLPC_INFO *info) 1052static void tx_ready(MGSLPC_INFO *info, struct tty_struct *tty)
1054{ 1053{
1055 unsigned char fifo_count = 32; 1054 unsigned char fifo_count = 32;
1056 int c; 1055 int c;
@@ -1062,7 +1061,7 @@ static void tx_ready(MGSLPC_INFO *info)
1062 if (!info->tx_active) 1061 if (!info->tx_active)
1063 return; 1062 return;
1064 } else { 1063 } else {
1065 if (info->tty->stopped || info->tty->hw_stopped) { 1064 if (tty->stopped || tty->hw_stopped) {
1066 tx_stop(info); 1065 tx_stop(info);
1067 return; 1066 return;
1068 } 1067 }
@@ -1099,7 +1098,7 @@ static void tx_ready(MGSLPC_INFO *info)
1099 } 1098 }
1100} 1099}
1101 1100
1102static void cts_change(MGSLPC_INFO *info) 1101static void cts_change(MGSLPC_INFO *info, struct tty_struct *tty)
1103{ 1102{
1104 get_signals(info); 1103 get_signals(info);
1105 if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) 1104 if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
@@ -1112,14 +1111,14 @@ static void cts_change(MGSLPC_INFO *info)
1112 wake_up_interruptible(&info->status_event_wait_q); 1111 wake_up_interruptible(&info->status_event_wait_q);
1113 wake_up_interruptible(&info->event_wait_q); 1112 wake_up_interruptible(&info->event_wait_q);
1114 1113
1115 if (info->flags & ASYNC_CTS_FLOW) { 1114 if (info->port.flags & ASYNC_CTS_FLOW) {
1116 if (info->tty->hw_stopped) { 1115 if (tty->hw_stopped) {
1117 if (info->serial_signals & SerialSignal_CTS) { 1116 if (info->serial_signals & SerialSignal_CTS) {
1118 if (debug_level >= DEBUG_LEVEL_ISR) 1117 if (debug_level >= DEBUG_LEVEL_ISR)
1119 printk("CTS tx start..."); 1118 printk("CTS tx start...");
1120 if (info->tty) 1119 if (tty)
1121 info->tty->hw_stopped = 0; 1120 tty->hw_stopped = 0;
1122 tx_start(info); 1121 tx_start(info, tty);
1123 info->pending_bh |= BH_TRANSMIT; 1122 info->pending_bh |= BH_TRANSMIT;
1124 return; 1123 return;
1125 } 1124 }
@@ -1127,8 +1126,8 @@ static void cts_change(MGSLPC_INFO *info)
1127 if (!(info->serial_signals & SerialSignal_CTS)) { 1126 if (!(info->serial_signals & SerialSignal_CTS)) {
1128 if (debug_level >= DEBUG_LEVEL_ISR) 1127 if (debug_level >= DEBUG_LEVEL_ISR)
1129 printk("CTS tx stop..."); 1128 printk("CTS tx stop...");
1130 if (info->tty) 1129 if (tty)
1131 info->tty->hw_stopped = 1; 1130 tty->hw_stopped = 1;
1132 tx_stop(info); 1131 tx_stop(info);
1133 } 1132 }
1134 } 1133 }
@@ -1136,7 +1135,7 @@ static void cts_change(MGSLPC_INFO *info)
1136 info->pending_bh |= BH_STATUS; 1135 info->pending_bh |= BH_STATUS;
1137} 1136}
1138 1137
1139static void dcd_change(MGSLPC_INFO *info) 1138static void dcd_change(MGSLPC_INFO *info, struct tty_struct *tty)
1140{ 1139{
1141 get_signals(info); 1140 get_signals(info);
1142 if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) 1141 if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
@@ -1158,17 +1157,17 @@ static void dcd_change(MGSLPC_INFO *info)
1158 wake_up_interruptible(&info->status_event_wait_q); 1157 wake_up_interruptible(&info->status_event_wait_q);
1159 wake_up_interruptible(&info->event_wait_q); 1158 wake_up_interruptible(&info->event_wait_q);
1160 1159
1161 if (info->flags & ASYNC_CHECK_CD) { 1160 if (info->port.flags & ASYNC_CHECK_CD) {
1162 if (debug_level >= DEBUG_LEVEL_ISR) 1161 if (debug_level >= DEBUG_LEVEL_ISR)
1163 printk("%s CD now %s...", info->device_name, 1162 printk("%s CD now %s...", info->device_name,
1164 (info->serial_signals & SerialSignal_DCD) ? "on" : "off"); 1163 (info->serial_signals & SerialSignal_DCD) ? "on" : "off");
1165 if (info->serial_signals & SerialSignal_DCD) 1164 if (info->serial_signals & SerialSignal_DCD)
1166 wake_up_interruptible(&info->open_wait); 1165 wake_up_interruptible(&info->port.open_wait);
1167 else { 1166 else {
1168 if (debug_level >= DEBUG_LEVEL_ISR) 1167 if (debug_level >= DEBUG_LEVEL_ISR)
1169 printk("doing serial hangup..."); 1168 printk("doing serial hangup...");
1170 if (info->tty) 1169 if (tty)
1171 tty_hangup(info->tty); 1170 tty_hangup(tty);
1172 } 1171 }
1173 } 1172 }
1174 info->pending_bh |= BH_STATUS; 1173 info->pending_bh |= BH_STATUS;
@@ -1214,6 +1213,7 @@ static void ri_change(MGSLPC_INFO *info)
1214static irqreturn_t mgslpc_isr(int dummy, void *dev_id) 1213static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
1215{ 1214{
1216 MGSLPC_INFO *info = dev_id; 1215 MGSLPC_INFO *info = dev_id;
1216 struct tty_struct *tty;
1217 unsigned short isr; 1217 unsigned short isr;
1218 unsigned char gis, pis; 1218 unsigned char gis, pis;
1219 int count=0; 1219 int count=0;
@@ -1224,6 +1224,8 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
1224 if (!(info->p_dev->_locked)) 1224 if (!(info->p_dev->_locked))
1225 return IRQ_HANDLED; 1225 return IRQ_HANDLED;
1226 1226
1227 tty = tty_port_tty_get(&info->port);
1228
1227 spin_lock(&info->lock); 1229 spin_lock(&info->lock);
1228 1230
1229 while ((gis = read_reg(info, CHA + GIS))) { 1231 while ((gis = read_reg(info, CHA + GIS))) {
@@ -1239,9 +1241,9 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
1239 if (gis & (BIT1 + BIT0)) { 1241 if (gis & (BIT1 + BIT0)) {
1240 isr = read_reg16(info, CHB + ISR); 1242 isr = read_reg16(info, CHB + ISR);
1241 if (isr & IRQ_DCD) 1243 if (isr & IRQ_DCD)
1242 dcd_change(info); 1244 dcd_change(info, tty);
1243 if (isr & IRQ_CTS) 1245 if (isr & IRQ_CTS)
1244 cts_change(info); 1246 cts_change(info, tty);
1245 } 1247 }
1246 if (gis & (BIT3 + BIT2)) 1248 if (gis & (BIT3 + BIT2))
1247 { 1249 {
@@ -1258,8 +1260,8 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
1258 } 1260 }
1259 if (isr & IRQ_BREAK_ON) { 1261 if (isr & IRQ_BREAK_ON) {
1260 info->icount.brk++; 1262 info->icount.brk++;
1261 if (info->flags & ASYNC_SAK) 1263 if (info->port.flags & ASYNC_SAK)
1262 do_SAK(info->tty); 1264 do_SAK(tty);
1263 } 1265 }
1264 if (isr & IRQ_RXTIME) { 1266 if (isr & IRQ_RXTIME) {
1265 issue_command(info, CHA, CMD_RXFIFO_READ); 1267 issue_command(info, CHA, CMD_RXFIFO_READ);
@@ -1268,7 +1270,7 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
1268 if (info->params.mode == MGSL_MODE_HDLC) 1270 if (info->params.mode == MGSL_MODE_HDLC)
1269 rx_ready_hdlc(info, isr & IRQ_RXEOM); 1271 rx_ready_hdlc(info, isr & IRQ_RXEOM);
1270 else 1272 else
1271 rx_ready_async(info, isr & IRQ_RXEOM); 1273 rx_ready_async(info, isr & IRQ_RXEOM, tty);
1272 } 1274 }
1273 1275
1274 /* transmit IRQs */ 1276 /* transmit IRQs */
@@ -1277,14 +1279,14 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
1277 info->icount.txabort++; 1279 info->icount.txabort++;
1278 else 1280 else
1279 info->icount.txunder++; 1281 info->icount.txunder++;
1280 tx_done(info); 1282 tx_done(info, tty);
1281 } 1283 }
1282 else if (isr & IRQ_ALLSENT) { 1284 else if (isr & IRQ_ALLSENT) {
1283 info->icount.txok++; 1285 info->icount.txok++;
1284 tx_done(info); 1286 tx_done(info, tty);
1285 } 1287 }
1286 else if (isr & IRQ_TXFIFO) 1288 else if (isr & IRQ_TXFIFO)
1287 tx_ready(info); 1289 tx_ready(info, tty);
1288 } 1290 }
1289 if (gis & BIT7) { 1291 if (gis & BIT7) {
1290 pis = read_reg(info, CHA + PIS); 1292 pis = read_reg(info, CHA + PIS);
@@ -1308,6 +1310,7 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
1308 } 1310 }
1309 1311
1310 spin_unlock(&info->lock); 1312 spin_unlock(&info->lock);
1313 tty_kref_put(tty);
1311 1314
1312 if (debug_level >= DEBUG_LEVEL_ISR) 1315 if (debug_level >= DEBUG_LEVEL_ISR)
1313 printk("%s(%d):mgslpc_isr(%d)exit.\n", 1316 printk("%s(%d):mgslpc_isr(%d)exit.\n",
@@ -1318,14 +1321,14 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
1318 1321
1319/* Initialize and start device. 1322/* Initialize and start device.
1320 */ 1323 */
1321static int startup(MGSLPC_INFO * info) 1324static int startup(MGSLPC_INFO * info, struct tty_struct *tty)
1322{ 1325{
1323 int retval = 0; 1326 int retval = 0;
1324 1327
1325 if (debug_level >= DEBUG_LEVEL_INFO) 1328 if (debug_level >= DEBUG_LEVEL_INFO)
1326 printk("%s(%d):startup(%s)\n",__FILE__,__LINE__,info->device_name); 1329 printk("%s(%d):startup(%s)\n",__FILE__,__LINE__,info->device_name);
1327 1330
1328 if (info->flags & ASYNC_INITIALIZED) 1331 if (info->port.flags & ASYNC_INITIALIZED)
1329 return 0; 1332 return 0;
1330 1333
1331 if (!info->tx_buf) { 1334 if (!info->tx_buf) {
@@ -1352,30 +1355,30 @@ static int startup(MGSLPC_INFO * info)
1352 retval = adapter_test(info); 1355 retval = adapter_test(info);
1353 1356
1354 if ( retval ) { 1357 if ( retval ) {
1355 if (capable(CAP_SYS_ADMIN) && info->tty) 1358 if (capable(CAP_SYS_ADMIN) && tty)
1356 set_bit(TTY_IO_ERROR, &info->tty->flags); 1359 set_bit(TTY_IO_ERROR, &tty->flags);
1357 release_resources(info); 1360 release_resources(info);
1358 return retval; 1361 return retval;
1359 } 1362 }
1360 1363
1361 /* program hardware for current parameters */ 1364 /* program hardware for current parameters */
1362 mgslpc_change_params(info); 1365 mgslpc_change_params(info, tty);
1363 1366
1364 if (info->tty) 1367 if (tty)
1365 clear_bit(TTY_IO_ERROR, &info->tty->flags); 1368 clear_bit(TTY_IO_ERROR, &tty->flags);
1366 1369
1367 info->flags |= ASYNC_INITIALIZED; 1370 info->port.flags |= ASYNC_INITIALIZED;
1368 1371
1369 return 0; 1372 return 0;
1370} 1373}
1371 1374
1372/* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware 1375/* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1373 */ 1376 */
1374static void shutdown(MGSLPC_INFO * info) 1377static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty)
1375{ 1378{
1376 unsigned long flags; 1379 unsigned long flags;
1377 1380
1378 if (!(info->flags & ASYNC_INITIALIZED)) 1381 if (!(info->port.flags & ASYNC_INITIALIZED))
1379 return; 1382 return;
1380 1383
1381 if (debug_level >= DEBUG_LEVEL_INFO) 1384 if (debug_level >= DEBUG_LEVEL_INFO)
@@ -1402,7 +1405,7 @@ static void shutdown(MGSLPC_INFO * info)
1402 /* TODO:disable interrupts instead of reset to preserve signal states */ 1405 /* TODO:disable interrupts instead of reset to preserve signal states */
1403 reset_device(info); 1406 reset_device(info);
1404 1407
1405 if (!info->tty || info->tty->termios->c_cflag & HUPCL) { 1408 if (!tty || tty->termios->c_cflag & HUPCL) {
1406 info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); 1409 info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
1407 set_signals(info); 1410 set_signals(info);
1408 } 1411 }
@@ -1411,13 +1414,13 @@ static void shutdown(MGSLPC_INFO * info)
1411 1414
1412 release_resources(info); 1415 release_resources(info);
1413 1416
1414 if (info->tty) 1417 if (tty)
1415 set_bit(TTY_IO_ERROR, &info->tty->flags); 1418 set_bit(TTY_IO_ERROR, &tty->flags);
1416 1419
1417 info->flags &= ~ASYNC_INITIALIZED; 1420 info->port.flags &= ~ASYNC_INITIALIZED;
1418} 1421}
1419 1422
1420static void mgslpc_program_hw(MGSLPC_INFO *info) 1423static void mgslpc_program_hw(MGSLPC_INFO *info, struct tty_struct *tty)
1421{ 1424{
1422 unsigned long flags; 1425 unsigned long flags;
1423 1426
@@ -1443,7 +1446,7 @@ static void mgslpc_program_hw(MGSLPC_INFO *info)
1443 port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI); 1446 port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI);
1444 get_signals(info); 1447 get_signals(info);
1445 1448
1446 if (info->netcount || info->tty->termios->c_cflag & CREAD) 1449 if (info->netcount || (tty && (tty->termios->c_cflag & CREAD)))
1447 rx_start(info); 1450 rx_start(info);
1448 1451
1449 spin_unlock_irqrestore(&info->lock,flags); 1452 spin_unlock_irqrestore(&info->lock,flags);
@@ -1451,19 +1454,19 @@ static void mgslpc_program_hw(MGSLPC_INFO *info)
1451 1454
1452/* Reconfigure adapter based on new parameters 1455/* Reconfigure adapter based on new parameters
1453 */ 1456 */
1454static void mgslpc_change_params(MGSLPC_INFO *info) 1457static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty)
1455{ 1458{
1456 unsigned cflag; 1459 unsigned cflag;
1457 int bits_per_char; 1460 int bits_per_char;
1458 1461
1459 if (!info->tty || !info->tty->termios) 1462 if (!tty || !tty->termios)
1460 return; 1463 return;
1461 1464
1462 if (debug_level >= DEBUG_LEVEL_INFO) 1465 if (debug_level >= DEBUG_LEVEL_INFO)
1463 printk("%s(%d):mgslpc_change_params(%s)\n", 1466 printk("%s(%d):mgslpc_change_params(%s)\n",
1464 __FILE__,__LINE__, info->device_name ); 1467 __FILE__,__LINE__, info->device_name );
1465 1468
1466 cflag = info->tty->termios->c_cflag; 1469 cflag = tty->termios->c_cflag;
1467 1470
1468 /* if B0 rate (hangup) specified then negate DTR and RTS */ 1471 /* if B0 rate (hangup) specified then negate DTR and RTS */
1469 /* otherwise assert DTR and RTS */ 1472 /* otherwise assert DTR and RTS */
@@ -1510,7 +1513,7 @@ static void mgslpc_change_params(MGSLPC_INFO *info)
1510 * current data rate. 1513 * current data rate.
1511 */ 1514 */
1512 if (info->params.data_rate <= 460800) { 1515 if (info->params.data_rate <= 460800) {
1513 info->params.data_rate = tty_get_baud_rate(info->tty); 1516 info->params.data_rate = tty_get_baud_rate(tty);
1514 } 1517 }
1515 1518
1516 if ( info->params.data_rate ) { 1519 if ( info->params.data_rate ) {
@@ -1520,24 +1523,24 @@ static void mgslpc_change_params(MGSLPC_INFO *info)
1520 info->timeout += HZ/50; /* Add .02 seconds of slop */ 1523 info->timeout += HZ/50; /* Add .02 seconds of slop */
1521 1524
1522 if (cflag & CRTSCTS) 1525 if (cflag & CRTSCTS)
1523 info->flags |= ASYNC_CTS_FLOW; 1526 info->port.flags |= ASYNC_CTS_FLOW;
1524 else 1527 else
1525 info->flags &= ~ASYNC_CTS_FLOW; 1528 info->port.flags &= ~ASYNC_CTS_FLOW;
1526 1529
1527 if (cflag & CLOCAL) 1530 if (cflag & CLOCAL)
1528 info->flags &= ~ASYNC_CHECK_CD; 1531 info->port.flags &= ~ASYNC_CHECK_CD;
1529 else 1532 else
1530 info->flags |= ASYNC_CHECK_CD; 1533 info->port.flags |= ASYNC_CHECK_CD;
1531 1534
1532 /* process tty input control flags */ 1535 /* process tty input control flags */
1533 1536
1534 info->read_status_mask = 0; 1537 info->read_status_mask = 0;
1535 if (I_INPCK(info->tty)) 1538 if (I_INPCK(tty))
1536 info->read_status_mask |= BIT7 | BIT6; 1539 info->read_status_mask |= BIT7 | BIT6;
1537 if (I_IGNPAR(info->tty)) 1540 if (I_IGNPAR(tty))
1538 info->ignore_status_mask |= BIT7 | BIT6; 1541 info->ignore_status_mask |= BIT7 | BIT6;
1539 1542
1540 mgslpc_program_hw(info); 1543 mgslpc_program_hw(info, tty);
1541} 1544}
1542 1545
1543/* Add a character to the transmit buffer 1546/* Add a character to the transmit buffer
@@ -1597,7 +1600,7 @@ static void mgslpc_flush_chars(struct tty_struct *tty)
1597 1600
1598 spin_lock_irqsave(&info->lock,flags); 1601 spin_lock_irqsave(&info->lock,flags);
1599 if (!info->tx_active) 1602 if (!info->tx_active)
1600 tx_start(info); 1603 tx_start(info, tty);
1601 spin_unlock_irqrestore(&info->lock,flags); 1604 spin_unlock_irqrestore(&info->lock,flags);
1602} 1605}
1603 1606
@@ -1659,7 +1662,7 @@ start:
1659 if (info->tx_count && !tty->stopped && !tty->hw_stopped) { 1662 if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
1660 spin_lock_irqsave(&info->lock,flags); 1663 spin_lock_irqsave(&info->lock,flags);
1661 if (!info->tx_active) 1664 if (!info->tx_active)
1662 tx_start(info); 1665 tx_start(info, tty);
1663 spin_unlock_irqrestore(&info->lock,flags); 1666 spin_unlock_irqrestore(&info->lock,flags);
1664 } 1667 }
1665cleanup: 1668cleanup:
@@ -1764,7 +1767,7 @@ static void mgslpc_send_xchar(struct tty_struct *tty, char ch)
1764 if (ch) { 1767 if (ch) {
1765 spin_lock_irqsave(&info->lock,flags); 1768 spin_lock_irqsave(&info->lock,flags);
1766 if (!info->tx_enabled) 1769 if (!info->tx_enabled)
1767 tx_start(info); 1770 tx_start(info, tty);
1768 spin_unlock_irqrestore(&info->lock,flags); 1771 spin_unlock_irqrestore(&info->lock,flags);
1769 } 1772 }
1770} 1773}
@@ -1862,7 +1865,7 @@ static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params)
1862 * 1865 *
1863 * Returns: 0 if success, otherwise error code 1866 * Returns: 0 if success, otherwise error code
1864 */ 1867 */
1865static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params) 1868static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params, struct tty_struct *tty)
1866{ 1869{
1867 unsigned long flags; 1870 unsigned long flags;
1868 MGSL_PARAMS tmp_params; 1871 MGSL_PARAMS tmp_params;
@@ -1883,7 +1886,7 @@ static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params)
1883 memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); 1886 memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
1884 spin_unlock_irqrestore(&info->lock,flags); 1887 spin_unlock_irqrestore(&info->lock,flags);
1885 1888
1886 mgslpc_change_params(info); 1889 mgslpc_change_params(info, tty);
1887 1890
1888 return 0; 1891 return 0;
1889} 1892}
@@ -1944,7 +1947,7 @@ static int set_interface(MGSLPC_INFO * info, int if_mode)
1944 return 0; 1947 return 0;
1945} 1948}
1946 1949
1947static int set_txenable(MGSLPC_INFO * info, int enable) 1950static int set_txenable(MGSLPC_INFO * info, int enable, struct tty_struct *tty)
1948{ 1951{
1949 unsigned long flags; 1952 unsigned long flags;
1950 1953
@@ -1954,7 +1957,7 @@ static int set_txenable(MGSLPC_INFO * info, int enable)
1954 spin_lock_irqsave(&info->lock,flags); 1957 spin_lock_irqsave(&info->lock,flags);
1955 if (enable) { 1958 if (enable) {
1956 if (!info->tx_enabled) 1959 if (!info->tx_enabled)
1957 tx_start(info); 1960 tx_start(info, tty);
1958 } else { 1961 } else {
1959 if (info->tx_enabled) 1962 if (info->tx_enabled)
1960 tx_stop(info); 1963 tx_stop(info);
@@ -2263,6 +2266,11 @@ static int mgslpc_ioctl(struct tty_struct *tty, struct file * file,
2263 unsigned int cmd, unsigned long arg) 2266 unsigned int cmd, unsigned long arg)
2264{ 2267{
2265 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; 2268 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2269 int error;
2270 struct mgsl_icount cnow; /* kernel counter temps */
2271 struct serial_icounter_struct __user *p_cuser; /* user space */
2272 void __user *argp = (void __user *)arg;
2273 unsigned long flags;
2266 2274
2267 if (debug_level >= DEBUG_LEVEL_INFO) 2275 if (debug_level >= DEBUG_LEVEL_INFO)
2268 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__, 2276 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__,
@@ -2277,22 +2285,11 @@ static int mgslpc_ioctl(struct tty_struct *tty, struct file * file,
2277 return -EIO; 2285 return -EIO;
2278 } 2286 }
2279 2287
2280 return ioctl_common(info, cmd, arg);
2281}
2282
2283static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg)
2284{
2285 int error;
2286 struct mgsl_icount cnow; /* kernel counter temps */
2287 struct serial_icounter_struct __user *p_cuser; /* user space */
2288 void __user *argp = (void __user *)arg;
2289 unsigned long flags;
2290
2291 switch (cmd) { 2288 switch (cmd) {
2292 case MGSL_IOCGPARAMS: 2289 case MGSL_IOCGPARAMS:
2293 return get_params(info, argp); 2290 return get_params(info, argp);
2294 case MGSL_IOCSPARAMS: 2291 case MGSL_IOCSPARAMS:
2295 return set_params(info, argp); 2292 return set_params(info, argp, tty);
2296 case MGSL_IOCGTXIDLE: 2293 case MGSL_IOCGTXIDLE:
2297 return get_txidle(info, argp); 2294 return get_txidle(info, argp);
2298 case MGSL_IOCSTXIDLE: 2295 case MGSL_IOCSTXIDLE:
@@ -2302,7 +2299,7 @@ static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg)
2302 case MGSL_IOCSIF: 2299 case MGSL_IOCSIF:
2303 return set_interface(info,(int)arg); 2300 return set_interface(info,(int)arg);
2304 case MGSL_IOCTXENABLE: 2301 case MGSL_IOCTXENABLE:
2305 return set_txenable(info,(int)arg); 2302 return set_txenable(info,(int)arg, tty);
2306 case MGSL_IOCRXENABLE: 2303 case MGSL_IOCRXENABLE:
2307 return set_rxenable(info,(int)arg); 2304 return set_rxenable(info,(int)arg);
2308 case MGSL_IOCTXABORT: 2305 case MGSL_IOCTXABORT:
@@ -2369,7 +2366,7 @@ static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_term
2369 == RELEVANT_IFLAG(old_termios->c_iflag))) 2366 == RELEVANT_IFLAG(old_termios->c_iflag)))
2370 return; 2367 return;
2371 2368
2372 mgslpc_change_params(info); 2369 mgslpc_change_params(info, tty);
2373 2370
2374 /* Handle transition to B0 status */ 2371 /* Handle transition to B0 status */
2375 if (old_termios->c_cflag & CBAUD && 2372 if (old_termios->c_cflag & CBAUD &&
@@ -2404,81 +2401,34 @@ static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_term
2404static void mgslpc_close(struct tty_struct *tty, struct file * filp) 2401static void mgslpc_close(struct tty_struct *tty, struct file * filp)
2405{ 2402{
2406 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; 2403 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2404 struct tty_port *port = &info->port;
2407 2405
2408 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close")) 2406 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close"))
2409 return; 2407 return;
2410 2408
2411 if (debug_level >= DEBUG_LEVEL_INFO) 2409 if (debug_level >= DEBUG_LEVEL_INFO)
2412 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n", 2410 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2413 __FILE__,__LINE__, info->device_name, info->count); 2411 __FILE__,__LINE__, info->device_name, port->count);
2414
2415 if (!info->count)
2416 return;
2417 2412
2418 if (tty_hung_up_p(filp)) 2413 WARN_ON(!port->count);
2419 goto cleanup;
2420
2421 if ((tty->count == 1) && (info->count != 1)) {
2422 /*
2423 * tty->count is 1 and the tty structure will be freed.
2424 * info->count should be one in this case.
2425 * if it's not, correct it so that the port is shutdown.
2426 */
2427 printk("mgslpc_close: bad refcount; tty->count is 1, "
2428 "info->count is %d\n", info->count);
2429 info->count = 1;
2430 }
2431 2414
2432 info->count--; 2415 if (tty_port_close_start(port, tty, filp) == 0)
2433
2434 /* if at least one open remaining, leave hardware active */
2435 if (info->count)
2436 goto cleanup; 2416 goto cleanup;
2437 2417
2438 info->flags |= ASYNC_CLOSING; 2418 if (port->flags & ASYNC_INITIALIZED)
2439
2440 /* set tty->closing to notify line discipline to
2441 * only process XON/XOFF characters. Only the N_TTY
2442 * discipline appears to use this (ppp does not).
2443 */
2444 tty->closing = 1;
2445
2446 /* wait for transmit data to clear all layers */
2447
2448 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) {
2449 if (debug_level >= DEBUG_LEVEL_INFO)
2450 printk("%s(%d):mgslpc_close(%s) calling tty_wait_until_sent\n",
2451 __FILE__,__LINE__, info->device_name );
2452 tty_wait_until_sent(tty, info->closing_wait);
2453 }
2454
2455 if (info->flags & ASYNC_INITIALIZED)
2456 mgslpc_wait_until_sent(tty, info->timeout); 2419 mgslpc_wait_until_sent(tty, info->timeout);
2457 2420
2458 mgslpc_flush_buffer(tty); 2421 mgslpc_flush_buffer(tty);
2459 2422
2460 tty_ldisc_flush(tty); 2423 tty_ldisc_flush(tty);
2461 2424 shutdown(info, tty);
2462 shutdown(info); 2425
2463 2426 tty_port_close_end(port, tty);
2464 tty->closing = 0; 2427 tty_port_tty_set(port, NULL);
2465 info->tty = NULL;
2466
2467 if (info->blocked_open) {
2468 if (info->close_delay) {
2469 msleep_interruptible(jiffies_to_msecs(info->close_delay));
2470 }
2471 wake_up_interruptible(&info->open_wait);
2472 }
2473
2474 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
2475
2476 wake_up_interruptible(&info->close_wait);
2477
2478cleanup: 2428cleanup:
2479 if (debug_level >= DEBUG_LEVEL_INFO) 2429 if (debug_level >= DEBUG_LEVEL_INFO)
2480 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__,__LINE__, 2430 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__,__LINE__,
2481 tty->driver->name, info->count); 2431 tty->driver->name, port->count);
2482} 2432}
2483 2433
2484/* Wait until the transmitter is empty. 2434/* Wait until the transmitter is empty.
@@ -2498,7 +2448,7 @@ static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout)
2498 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent")) 2448 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent"))
2499 return; 2449 return;
2500 2450
2501 if (!(info->flags & ASYNC_INITIALIZED)) 2451 if (!(info->port.flags & ASYNC_INITIALIZED))
2502 goto exit; 2452 goto exit;
2503 2453
2504 orig_jiffies = jiffies; 2454 orig_jiffies = jiffies;
@@ -2559,120 +2509,40 @@ static void mgslpc_hangup(struct tty_struct *tty)
2559 return; 2509 return;
2560 2510
2561 mgslpc_flush_buffer(tty); 2511 mgslpc_flush_buffer(tty);
2562 shutdown(info); 2512 shutdown(info, tty);
2563 2513 tty_port_hangup(&info->port);
2564 info->count = 0;
2565 info->flags &= ~ASYNC_NORMAL_ACTIVE;
2566 info->tty = NULL;
2567
2568 wake_up_interruptible(&info->open_wait);
2569} 2514}
2570 2515
2571/* Block the current process until the specified port 2516static int carrier_raised(struct tty_port *port)
2572 * is ready to be opened.
2573 */
2574static int block_til_ready(struct tty_struct *tty, struct file *filp,
2575 MGSLPC_INFO *info)
2576{ 2517{
2577 DECLARE_WAITQUEUE(wait, current); 2518 MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port);
2578 int retval; 2519 unsigned long flags;
2579 bool do_clocal = false;
2580 bool extra_count = false;
2581 unsigned long flags;
2582
2583 if (debug_level >= DEBUG_LEVEL_INFO)
2584 printk("%s(%d):block_til_ready on %s\n",
2585 __FILE__,__LINE__, tty->driver->name );
2586
2587 if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
2588 /* nonblock mode is set or port is not enabled */
2589 /* just verify that callout device is not active */
2590 info->flags |= ASYNC_NORMAL_ACTIVE;
2591 return 0;
2592 }
2593
2594 if (tty->termios->c_cflag & CLOCAL)
2595 do_clocal = true;
2596
2597 /* Wait for carrier detect and the line to become
2598 * free (i.e., not in use by the callout). While we are in
2599 * this loop, info->count is dropped by one, so that
2600 * mgslpc_close() knows when to free things. We restore it upon
2601 * exit, either normal or abnormal.
2602 */
2603
2604 retval = 0;
2605 add_wait_queue(&info->open_wait, &wait);
2606
2607 if (debug_level >= DEBUG_LEVEL_INFO)
2608 printk("%s(%d):block_til_ready before block on %s count=%d\n",
2609 __FILE__,__LINE__, tty->driver->name, info->count );
2610
2611 spin_lock_irqsave(&info->lock, flags);
2612 if (!tty_hung_up_p(filp)) {
2613 extra_count = true;
2614 info->count--;
2615 }
2616 spin_unlock_irqrestore(&info->lock, flags);
2617 info->blocked_open++;
2618
2619 while (1) {
2620 if ((tty->termios->c_cflag & CBAUD)) {
2621 spin_lock_irqsave(&info->lock,flags);
2622 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
2623 set_signals(info);
2624 spin_unlock_irqrestore(&info->lock,flags);
2625 }
2626
2627 set_current_state(TASK_INTERRUPTIBLE);
2628
2629 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)){
2630 retval = (info->flags & ASYNC_HUP_NOTIFY) ?
2631 -EAGAIN : -ERESTARTSYS;
2632 break;
2633 }
2634
2635 spin_lock_irqsave(&info->lock,flags);
2636 get_signals(info);
2637 spin_unlock_irqrestore(&info->lock,flags);
2638
2639 if (!(info->flags & ASYNC_CLOSING) &&
2640 (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) {
2641 break;
2642 }
2643
2644 if (signal_pending(current)) {
2645 retval = -ERESTARTSYS;
2646 break;
2647 }
2648
2649 if (debug_level >= DEBUG_LEVEL_INFO)
2650 printk("%s(%d):block_til_ready blocking on %s count=%d\n",
2651 __FILE__,__LINE__, tty->driver->name, info->count );
2652
2653 schedule();
2654 }
2655
2656 set_current_state(TASK_RUNNING);
2657 remove_wait_queue(&info->open_wait, &wait);
2658 2520
2659 if (extra_count) 2521 spin_lock_irqsave(&info->lock,flags);
2660 info->count++; 2522 get_signals(info);
2661 info->blocked_open--; 2523 spin_unlock_irqrestore(&info->lock,flags);
2662 2524
2663 if (debug_level >= DEBUG_LEVEL_INFO) 2525 if (info->serial_signals & SerialSignal_DCD)
2664 printk("%s(%d):block_til_ready after blocking on %s count=%d\n", 2526 return 1;
2665 __FILE__,__LINE__, tty->driver->name, info->count ); 2527 return 0;
2528}
2666 2529
2667 if (!retval) 2530static void raise_dtr_rts(struct tty_port *port)
2668 info->flags |= ASYNC_NORMAL_ACTIVE; 2531{
2532 MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port);
2533 unsigned long flags;
2669 2534
2670 return retval; 2535 spin_lock_irqsave(&info->lock,flags);
2536 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
2537 set_signals(info);
2538 spin_unlock_irqrestore(&info->lock,flags);
2671} 2539}
2672 2540
2541
2673static int mgslpc_open(struct tty_struct *tty, struct file * filp) 2542static int mgslpc_open(struct tty_struct *tty, struct file * filp)
2674{ 2543{
2675 MGSLPC_INFO *info; 2544 MGSLPC_INFO *info;
2545 struct tty_port *port;
2676 int retval, line; 2546 int retval, line;
2677 unsigned long flags; 2547 unsigned long flags;
2678 2548
@@ -2691,23 +2561,24 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
2691 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open")) 2561 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open"))
2692 return -ENODEV; 2562 return -ENODEV;
2693 2563
2564 port = &info->port;
2694 tty->driver_data = info; 2565 tty->driver_data = info;
2695 info->tty = tty; 2566 tty_port_tty_set(port, tty);
2696 2567
2697 if (debug_level >= DEBUG_LEVEL_INFO) 2568 if (debug_level >= DEBUG_LEVEL_INFO)
2698 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n", 2569 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2699 __FILE__,__LINE__,tty->driver->name, info->count); 2570 __FILE__,__LINE__,tty->driver->name, port->count);
2700 2571
2701 /* If port is closing, signal caller to try again */ 2572 /* If port is closing, signal caller to try again */
2702 if (tty_hung_up_p(filp) || info->flags & ASYNC_CLOSING){ 2573 if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING){
2703 if (info->flags & ASYNC_CLOSING) 2574 if (port->flags & ASYNC_CLOSING)
2704 interruptible_sleep_on(&info->close_wait); 2575 interruptible_sleep_on(&port->close_wait);
2705 retval = ((info->flags & ASYNC_HUP_NOTIFY) ? 2576 retval = ((port->flags & ASYNC_HUP_NOTIFY) ?
2706 -EAGAIN : -ERESTARTSYS); 2577 -EAGAIN : -ERESTARTSYS);
2707 goto cleanup; 2578 goto cleanup;
2708 } 2579 }
2709 2580
2710 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; 2581 tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2711 2582
2712 spin_lock_irqsave(&info->netlock, flags); 2583 spin_lock_irqsave(&info->netlock, flags);
2713 if (info->netcount) { 2584 if (info->netcount) {
@@ -2715,17 +2586,19 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
2715 spin_unlock_irqrestore(&info->netlock, flags); 2586 spin_unlock_irqrestore(&info->netlock, flags);
2716 goto cleanup; 2587 goto cleanup;
2717 } 2588 }
2718 info->count++; 2589 spin_lock(&port->lock);
2590 port->count++;
2591 spin_unlock(&port->lock);
2719 spin_unlock_irqrestore(&info->netlock, flags); 2592 spin_unlock_irqrestore(&info->netlock, flags);
2720 2593
2721 if (info->count == 1) { 2594 if (port->count == 1) {
2722 /* 1st open on this device, init hardware */ 2595 /* 1st open on this device, init hardware */
2723 retval = startup(info); 2596 retval = startup(info, tty);
2724 if (retval < 0) 2597 if (retval < 0)
2725 goto cleanup; 2598 goto cleanup;
2726 } 2599 }
2727 2600
2728 retval = block_til_ready(tty, filp, info); 2601 retval = tty_port_block_til_ready(&info->port, tty, filp);
2729 if (retval) { 2602 if (retval) {
2730 if (debug_level >= DEBUG_LEVEL_INFO) 2603 if (debug_level >= DEBUG_LEVEL_INFO)
2731 printk("%s(%d):block_til_ready(%s) returned %d\n", 2604 printk("%s(%d):block_til_ready(%s) returned %d\n",
@@ -2739,13 +2612,6 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
2739 retval = 0; 2612 retval = 0;
2740 2613
2741cleanup: 2614cleanup:
2742 if (retval) {
2743 if (tty->count == 1)
2744 info->tty = NULL; /* tty layer will release tty struct */
2745 if(info->count)
2746 info->count--;
2747 }
2748
2749 return retval; 2615 return retval;
2750} 2616}
2751 2617
@@ -3500,7 +3366,7 @@ static void rx_start(MGSLPC_INFO *info)
3500 info->rx_enabled = true; 3366 info->rx_enabled = true;
3501} 3367}
3502 3368
3503static void tx_start(MGSLPC_INFO *info) 3369static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty)
3504{ 3370{
3505 if (debug_level >= DEBUG_LEVEL_ISR) 3371 if (debug_level >= DEBUG_LEVEL_ISR)
3506 printk("%s(%d):tx_start(%s)\n", 3372 printk("%s(%d):tx_start(%s)\n",
@@ -3524,11 +3390,11 @@ static void tx_start(MGSLPC_INFO *info)
3524 if (info->params.mode == MGSL_MODE_ASYNC) { 3390 if (info->params.mode == MGSL_MODE_ASYNC) {
3525 if (!info->tx_active) { 3391 if (!info->tx_active) {
3526 info->tx_active = true; 3392 info->tx_active = true;
3527 tx_ready(info); 3393 tx_ready(info, tty);
3528 } 3394 }
3529 } else { 3395 } else {
3530 info->tx_active = true; 3396 info->tx_active = true;
3531 tx_ready(info); 3397 tx_ready(info, tty);
3532 mod_timer(&info->tx_timer, jiffies + 3398 mod_timer(&info->tx_timer, jiffies +
3533 msecs_to_jiffies(5000)); 3399 msecs_to_jiffies(5000));
3534 } 3400 }
@@ -3849,13 +3715,12 @@ static void rx_reset_buffers(MGSLPC_INFO *info)
3849 * 3715 *
3850 * Returns true if frame returned, otherwise false 3716 * Returns true if frame returned, otherwise false
3851 */ 3717 */
3852static bool rx_get_frame(MGSLPC_INFO *info) 3718static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty)
3853{ 3719{
3854 unsigned short status; 3720 unsigned short status;
3855 RXBUF *buf; 3721 RXBUF *buf;
3856 unsigned int framesize = 0; 3722 unsigned int framesize = 0;
3857 unsigned long flags; 3723 unsigned long flags;
3858 struct tty_struct *tty = info->tty;
3859 bool return_frame = false; 3724 bool return_frame = false;
3860 3725
3861 if (info->rx_frame_count == 0) 3726 if (info->rx_frame_count == 0)
@@ -4075,7 +3940,11 @@ static void tx_timeout(unsigned long context)
4075 hdlcdev_tx_done(info); 3940 hdlcdev_tx_done(info);
4076 else 3941 else
4077#endif 3942#endif
4078 bh_transmit(info); 3943 {
3944 struct tty_struct *tty = tty_port_tty_get(&info->port);
3945 bh_transmit(info, tty);
3946 tty_kref_put(tty);
3947 }
4079} 3948}
4080 3949
4081#if SYNCLINK_GENERIC_HDLC 3950#if SYNCLINK_GENERIC_HDLC
@@ -4094,11 +3963,12 @@ static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
4094 unsigned short parity) 3963 unsigned short parity)
4095{ 3964{
4096 MGSLPC_INFO *info = dev_to_port(dev); 3965 MGSLPC_INFO *info = dev_to_port(dev);
3966 struct tty_struct *tty;
4097 unsigned char new_encoding; 3967 unsigned char new_encoding;
4098 unsigned short new_crctype; 3968 unsigned short new_crctype;
4099 3969
4100 /* return error if TTY interface open */ 3970 /* return error if TTY interface open */
4101 if (info->count) 3971 if (info->port.count)
4102 return -EBUSY; 3972 return -EBUSY;
4103 3973
4104 switch (encoding) 3974 switch (encoding)
@@ -4123,8 +3993,11 @@ static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
4123 info->params.crc_type = new_crctype; 3993 info->params.crc_type = new_crctype;
4124 3994
4125 /* if network interface up, reprogram hardware */ 3995 /* if network interface up, reprogram hardware */
4126 if (info->netcount) 3996 if (info->netcount) {
4127 mgslpc_program_hw(info); 3997 tty = tty_port_tty_get(&info->port);
3998 mgslpc_program_hw(info, tty);
3999 tty_kref_put(tty);
4000 }
4128 4001
4129 return 0; 4002 return 0;
4130} 4003}
@@ -4165,8 +4038,11 @@ static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
4165 4038
4166 /* start hardware transmitter if necessary */ 4039 /* start hardware transmitter if necessary */
4167 spin_lock_irqsave(&info->lock,flags); 4040 spin_lock_irqsave(&info->lock,flags);
4168 if (!info->tx_active) 4041 if (!info->tx_active) {
4169 tx_start(info); 4042 struct tty_struct *tty = tty_port_tty_get(&info->port);
4043 tx_start(info, tty);
4044 tty_kref_put(tty);
4045 }
4170 spin_unlock_irqrestore(&info->lock,flags); 4046 spin_unlock_irqrestore(&info->lock,flags);
4171 4047
4172 return 0; 4048 return 0;
@@ -4183,6 +4059,7 @@ static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
4183static int hdlcdev_open(struct net_device *dev) 4059static int hdlcdev_open(struct net_device *dev)
4184{ 4060{
4185 MGSLPC_INFO *info = dev_to_port(dev); 4061 MGSLPC_INFO *info = dev_to_port(dev);
4062 struct tty_struct *tty;
4186 int rc; 4063 int rc;
4187 unsigned long flags; 4064 unsigned long flags;
4188 4065
@@ -4195,7 +4072,7 @@ static int hdlcdev_open(struct net_device *dev)
4195 4072
4196 /* arbitrate between network and tty opens */ 4073 /* arbitrate between network and tty opens */
4197 spin_lock_irqsave(&info->netlock, flags); 4074 spin_lock_irqsave(&info->netlock, flags);
4198 if (info->count != 0 || info->netcount != 0) { 4075 if (info->port.count != 0 || info->netcount != 0) {
4199 printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name); 4076 printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
4200 spin_unlock_irqrestore(&info->netlock, flags); 4077 spin_unlock_irqrestore(&info->netlock, flags);
4201 return -EBUSY; 4078 return -EBUSY;
@@ -4203,17 +4080,19 @@ static int hdlcdev_open(struct net_device *dev)
4203 info->netcount=1; 4080 info->netcount=1;
4204 spin_unlock_irqrestore(&info->netlock, flags); 4081 spin_unlock_irqrestore(&info->netlock, flags);
4205 4082
4083 tty = tty_port_tty_get(&info->port);
4206 /* claim resources and init adapter */ 4084 /* claim resources and init adapter */
4207 if ((rc = startup(info)) != 0) { 4085 if ((rc = startup(info, tty)) != 0) {
4086 tty_kref_put(tty);
4208 spin_lock_irqsave(&info->netlock, flags); 4087 spin_lock_irqsave(&info->netlock, flags);
4209 info->netcount=0; 4088 info->netcount=0;
4210 spin_unlock_irqrestore(&info->netlock, flags); 4089 spin_unlock_irqrestore(&info->netlock, flags);
4211 return rc; 4090 return rc;
4212 } 4091 }
4213
4214 /* assert DTR and RTS, apply hardware settings */ 4092 /* assert DTR and RTS, apply hardware settings */
4215 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; 4093 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
4216 mgslpc_program_hw(info); 4094 mgslpc_program_hw(info, tty);
4095 tty_kref_put(tty);
4217 4096
4218 /* enable network layer transmit */ 4097 /* enable network layer transmit */
4219 dev->trans_start = jiffies; 4098 dev->trans_start = jiffies;
@@ -4241,6 +4120,7 @@ static int hdlcdev_open(struct net_device *dev)
4241static int hdlcdev_close(struct net_device *dev) 4120static int hdlcdev_close(struct net_device *dev)
4242{ 4121{
4243 MGSLPC_INFO *info = dev_to_port(dev); 4122 MGSLPC_INFO *info = dev_to_port(dev);
4123 struct tty_struct *tty = tty_port_tty_get(&info->port);
4244 unsigned long flags; 4124 unsigned long flags;
4245 4125
4246 if (debug_level >= DEBUG_LEVEL_INFO) 4126 if (debug_level >= DEBUG_LEVEL_INFO)
@@ -4249,8 +4129,8 @@ static int hdlcdev_close(struct net_device *dev)
4249 netif_stop_queue(dev); 4129 netif_stop_queue(dev);
4250 4130
4251 /* shutdown adapter and release resources */ 4131 /* shutdown adapter and release resources */
4252 shutdown(info); 4132 shutdown(info, tty);
4253 4133 tty_kref_put(tty);
4254 hdlc_close(dev); 4134 hdlc_close(dev);
4255 4135
4256 spin_lock_irqsave(&info->netlock, flags); 4136 spin_lock_irqsave(&info->netlock, flags);
@@ -4281,7 +4161,7 @@ static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
4281 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name); 4161 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
4282 4162
4283 /* return error if TTY interface open */ 4163 /* return error if TTY interface open */
4284 if (info->count) 4164 if (info->port.count)
4285 return -EBUSY; 4165 return -EBUSY;
4286 4166
4287 if (cmd != SIOCWANDEV) 4167 if (cmd != SIOCWANDEV)
@@ -4354,8 +4234,11 @@ static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
4354 info->params.clock_speed = 0; 4234 info->params.clock_speed = 0;
4355 4235
4356 /* if network interface up, reprogram hardware */ 4236 /* if network interface up, reprogram hardware */
4357 if (info->netcount) 4237 if (info->netcount) {
4358 mgslpc_program_hw(info); 4238 struct tty_struct *tty = tty_port_tty_get(&info->port);
4239 mgslpc_program_hw(info, tty);
4240 tty_kref_put(tty);
4241 }
4359 return 0; 4242 return 0;
4360 4243
4361 default: 4244 default:
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-27 05:35:13 -0400