3  * low level b-channel stuff for Siemens HSCX
17 waitforCEC(struct IsdnCardState *cs, int hscx)  in waitforCEC()  argument
21 	while ((READHSCX(cs, hscx, HSCX_STAR) & 0x04) && to) {  in waitforCEC()
23 		to--;  in waitforCEC()
31 waitforXFW(struct IsdnCardState *cs, int hscx)  in waitforXFW()  argument
35 	while (((READHSCX(cs, hscx, HSCX_STAR) & 0x44) != 0x40) && to) {  in waitforXFW()
37 		to--;  in waitforXFW()
44 WriteHSCXCMDR(struct IsdnCardState *cs, int hscx, u_char data)  in WriteHSCXCMDR()  argument
46 	waitforCEC(cs, hscx);  in WriteHSCXCMDR()
47 	WRITEHSCX(cs, hscx, HSCX_CMDR, data);  in WriteHSCXCMDR()
56 	struct IsdnCardState *cs = bcs->cs;  in hscx_empty_fifo()  local
58 	if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO))  in hscx_empty_fifo()
59 		debugl1(cs, "hscx_empty_fifo");  in hscx_empty_fifo()
61 	if (bcs->hw.hscx.rcvidx + count > HSCX_BUFMAX) {  in hscx_empty_fifo()
62 		if (cs->debug & L1_DEB_WARN)  in hscx_empty_fifo()
63 			debugl1(cs, "hscx_empty_fifo: incoming packet too large");  in hscx_empty_fifo()
64 		WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, 0x80);  in hscx_empty_fifo()
65 		bcs->hw.hscx.rcvidx = 0;  in hscx_empty_fifo()
68 	ptr = bcs->hw.hscx.rcvbuf + bcs->hw.hscx.rcvidx;  in hscx_empty_fifo()
69 	bcs->hw.hscx.rcvidx += count;  in hscx_empty_fifo()
70 	READHSCXFIFO(cs, bcs->hw.hscx.hscx, ptr, count);  in hscx_empty_fifo()
71 	WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, 0x80);  in hscx_empty_fifo()
72 	if (cs->debug & L1_DEB_HSCX_FIFO) {  in hscx_empty_fifo()
73 		char *t = bcs->blog;  in hscx_empty_fifo()
76 			     bcs->hw.hscx.hscx ? 'B' : 'A', count);  in hscx_empty_fifo()
78 		debugl1(cs, "%s", bcs->blog);  in hscx_empty_fifo()
85 	struct IsdnCardState *cs = bcs->cs;  in hscx_fill_fifo()  local
87 	int fifo_size = test_bit(HW_IPAC, &cs->HW_Flags) ? 64 : 32;  in hscx_fill_fifo()
90 	if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO))  in hscx_fill_fifo()
91 		debugl1(cs, "hscx_fill_fifo");  in hscx_fill_fifo()
93 	if (!bcs->tx_skb)  in hscx_fill_fifo()
95 	if (bcs->tx_skb->len <= 0)  in hscx_fill_fifo()
98 	more = (bcs->mode == L1_MODE_TRANS) ? 1 : 0;  in hscx_fill_fifo()
99 	if (bcs->tx_skb->len > fifo_size) {  in hscx_fill_fifo()
103 		count = bcs->tx_skb->len;  in hscx_fill_fifo()
105 	waitforXFW(cs, bcs->hw.hscx.hscx);  in hscx_fill_fifo()
106 	ptr = bcs->tx_skb->data;  in hscx_fill_fifo()
107 	skb_pull(bcs->tx_skb, count);  in hscx_fill_fifo()
108 	bcs->tx_cnt -= count;  in hscx_fill_fifo()
109 	bcs->hw.hscx.count += count;  in hscx_fill_fifo()
110 	WRITEHSCXFIFO(cs, bcs->hw.hscx.hscx, ptr, count);  in hscx_fill_fifo()
111 	WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, more ? 0x8 : 0xa);  in hscx_fill_fifo()
112 	if (cs->debug & L1_DEB_HSCX_FIFO) {  in hscx_fill_fifo()
113 		char *t = bcs->blog;  in hscx_fill_fifo()
116 			     bcs->hw.hscx.hscx ? 'B' : 'A', count);  in hscx_fill_fifo()
118 		debugl1(cs, "%s", bcs->blog);  in hscx_fill_fifo()
123 hscx_interrupt(struct IsdnCardState *cs, u_char val, u_char hscx)  in hscx_interrupt()  argument
126 	struct BCState *bcs = cs->bcs + hscx;  in hscx_interrupt()
128 	int fifo_size = test_bit(HW_IPAC, &cs->HW_Flags) ? 64 : 32;  in hscx_interrupt()
131 	if (!test_bit(BC_FLG_INIT, &bcs->Flag))  in hscx_interrupt()
135 		r = READHSCX(cs, hscx, HSCX_RSTA);  in hscx_interrupt()
138 				if (cs->debug & L1_DEB_WARN)  in hscx_interrupt()
139 					debugl1(cs, "HSCX invalid frame");  in hscx_interrupt()
141 				bcs->err_inv++;  in hscx_interrupt()
144 			if ((r & 0x40) && bcs->mode) {  in hscx_interrupt()
145 				if (cs->debug & L1_DEB_WARN)  in hscx_interrupt()
146 					debugl1(cs, "HSCX RDO mode=%d",  in hscx_interrupt()
147 						bcs->mode);  in hscx_interrupt()
149 				bcs->err_rdo++;  in hscx_interrupt()
153 				if (cs->debug & L1_DEB_WARN)  in hscx_interrupt()
154 					debugl1(cs, "HSCX CRC error");  in hscx_interrupt()
156 				bcs->err_crc++;  in hscx_interrupt()
159 			WriteHSCXCMDR(cs, hscx, 0x80);  in hscx_interrupt()
161 			count = READHSCX(cs, hscx, HSCX_RBCL) & (  in hscx_interrupt()
162 				test_bit(HW_IPAC, &cs->HW_Flags) ? 0x3f : 0x1f);  in hscx_interrupt()
166 			if ((count = bcs->hw.hscx.rcvidx - 1) > 0) {  in hscx_interrupt()
167 				if (cs->debug & L1_DEB_HSCX_FIFO)  in hscx_interrupt()
168 					debugl1(cs, "HX Frame %d", count);  in hscx_interrupt()
170 					printk(KERN_WARNING "HSCX: receive out of memory\n");  in hscx_interrupt()
172 					skb_put_data(skb, bcs->hw.hscx.rcvbuf,  in hscx_interrupt()
174 					skb_queue_tail(&bcs->rqueue, skb);  in hscx_interrupt()
178 		bcs->hw.hscx.rcvidx = 0;  in hscx_interrupt()
183 		if (bcs->mode == L1_MODE_TRANS) {  in hscx_interrupt()
186 				printk(KERN_WARNING "HiSax: receive out of memory\n");  in hscx_interrupt()
188 				skb_put_data(skb, bcs->hw.hscx.rcvbuf,  in hscx_interrupt()
190 				skb_queue_tail(&bcs->rqueue, skb);  in hscx_interrupt()
192 			bcs->hw.hscx.rcvidx = 0;  in hscx_interrupt()
197 		if (bcs->tx_skb) {  in hscx_interrupt()
198 			if (bcs->tx_skb->len) {  in hscx_interrupt()
202 				if (test_bit(FLG_LLI_L1WAKEUP, &bcs->st->lli.flag) &&  in hscx_interrupt()
203 				    (PACKET_NOACK != bcs->tx_skb->pkt_type)) {  in hscx_interrupt()
205 					spin_lock_irqsave(&bcs->aclock, flags);  in hscx_interrupt()
206 					bcs->ackcnt += bcs->hw.hscx.count;  in hscx_interrupt()
207 					spin_unlock_irqrestore(&bcs->aclock, flags);  in hscx_interrupt()
210 				dev_kfree_skb_irq(bcs->tx_skb);  in hscx_interrupt()
211 				bcs->hw.hscx.count = 0;  in hscx_interrupt()
212 				bcs->tx_skb = NULL;  in hscx_interrupt()
215 		if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {  in hscx_interrupt()
216 			bcs->hw.hscx.count = 0;  in hscx_interrupt()
217 			test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);  in hscx_interrupt()
220 			test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);  in hscx_interrupt()
227 hscx_int_main(struct IsdnCardState *cs, u_char val)  in hscx_int_main()  argument
234 		bcs = cs->bcs + 1;  in hscx_int_main()
235 		exval = READHSCX(cs, 1, HSCX_EXIR);  in hscx_int_main()
237 			if (bcs->mode == 1)  in hscx_int_main()
241 				bcs->err_tx++;  in hscx_int_main()
246 				if (bcs->tx_skb) {  in hscx_int_main()
247 					skb_push(bcs->tx_skb, bcs->hw.hscx.count);  in hscx_int_main()
248 					bcs->tx_cnt += bcs->hw.hscx.count;  in hscx_int_main()
249 					bcs->hw.hscx.count = 0;  in hscx_int_main()
251 				WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, 0x01);  in hscx_int_main()
252 				if (cs->debug & L1_DEB_WARN)  in hscx_int_main()
253 					debugl1(cs, "HSCX B EXIR %x Lost TX", exval);  in hscx_int_main()
255 		} else if (cs->debug & L1_DEB_HSCX)  in hscx_int_main()
256 			debugl1(cs, "HSCX B EXIR %x", exval);  in hscx_int_main()
259 		if (cs->debug & L1_DEB_HSCX)  in hscx_int_main()
260 			debugl1(cs, "HSCX B interrupt %x", val);  in hscx_int_main()
261 		hscx_interrupt(cs, val, 1);  in hscx_int_main()
264 		bcs = cs->bcs;  in hscx_int_main()
265 		exval = READHSCX(cs, 0, HSCX_EXIR);  in hscx_int_main()
267 			if (bcs->mode == L1_MODE_TRANS)  in hscx_int_main()
274 				bcs->err_tx++;  in hscx_int_main()
276 				if (bcs->tx_skb) {  in hscx_int_main()
277 					skb_push(bcs->tx_skb, bcs->hw.hscx.count);  in hscx_int_main()
278 					bcs->tx_cnt += bcs->hw.hscx.count;  in hscx_int_main()
279 					bcs->hw.hscx.count = 0;  in hscx_int_main()
281 				WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, 0x01);  in hscx_int_main()
282 				if (cs->debug & L1_DEB_WARN)  in hscx_int_main()
283 					debugl1(cs, "HSCX A EXIR %x Lost TX", exval);  in hscx_int_main()
285 		} else if (cs->debug & L1_DEB_HSCX)  in hscx_int_main()
286 			debugl1(cs, "HSCX A EXIR %x", exval);  in hscx_int_main()
289 		exval = READHSCX(cs, 0, HSCX_ISTA);  in hscx_int_main()
290 		if (cs->debug & L1_DEB_HSCX)  in hscx_int_main()
291 			debugl1(cs, "HSCX A interrupt %x", exval);  in hscx_int_main()
292 		hscx_interrupt(cs, exval, 0);  in hscx_int_main()