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/drivers/isdn/hisax/nj_u.c

http://github.com/mirrors/linux
C | 258 lines | 213 code | 29 blank | 16 comment | 24 complexity | bcc0579f5d73f714620caf300d92bdd1 MD5 | raw file
  1/* $Id: nj_u.c,v 2.14.2.3 2004/01/13 14:31:26 keil Exp $
  2 *
  3 * This software may be used and distributed according to the terms
  4 * of the GNU General Public License, incorporated herein by reference.
  5 *
  6 */
  7
  8#include <linux/init.h>
  9#include "hisax.h"
 10#include "icc.h"
 11#include "isdnl1.h"
 12#include <linux/pci.h>
 13#include <linux/interrupt.h>
 14#include <linux/ppp_defs.h>
 15#include "netjet.h"
 16
 17static const char *NETjet_U_revision = "$Revision: 2.14.2.3 $";
 18
 19static u_char dummyrr(struct IsdnCardState *cs, int chan, u_char off)
 20{
 21	return (5);
 22}
 23
 24static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value)
 25{
 26}
 27
 28static irqreturn_t
 29netjet_u_interrupt(int intno, void *dev_id)
 30{
 31	struct IsdnCardState *cs = dev_id;
 32	u_char val, sval;
 33	u_long flags;
 34
 35	spin_lock_irqsave(&cs->lock, flags);
 36	if (!((sval = bytein(cs->hw.njet.base + NETJET_IRQSTAT1)) &
 37	      NETJET_ISACIRQ)) {
 38		val = NETjet_ReadIC(cs, ICC_ISTA);
 39		if (cs->debug & L1_DEB_ISAC)
 40			debugl1(cs, "tiger: i1 %x %x", sval, val);
 41		if (val) {
 42			icc_interrupt(cs, val);
 43			NETjet_WriteIC(cs, ICC_MASK, 0xFF);
 44			NETjet_WriteIC(cs, ICC_MASK, 0x0);
 45		}
 46	}
 47	/* start new code 13/07/00 GE */
 48	/* set bits in sval to indicate which page is free */
 49	if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) <
 50	    inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ))
 51		/* the 2nd write page is free */
 52		sval = 0x08;
 53	else	/* the 1st write page is free */
 54		sval = 0x04;
 55	if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) <
 56	    inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ))
 57		/* the 2nd read page is free */
 58		sval = sval | 0x02;
 59	else	/* the 1st read page is free */
 60		sval = sval | 0x01;
 61	if (sval != cs->hw.njet.last_is0) /* we have a DMA interrupt */
 62	{
 63		if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
 64			spin_unlock_irqrestore(&cs->lock, flags);
 65			return IRQ_HANDLED;
 66		}
 67		cs->hw.njet.irqstat0 = sval;
 68		if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) !=
 69		    (cs->hw.njet.last_is0 & NETJET_IRQM0_READ))
 70			/* we have a read dma int */
 71			read_tiger(cs);
 72		if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) !=
 73		    (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE))
 74			/* we have a write dma int */
 75			write_tiger(cs);
 76		/* end new code 13/07/00 GE */
 77		test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
 78	}
 79	spin_unlock_irqrestore(&cs->lock, flags);
 80	return IRQ_HANDLED;
 81}
 82
 83static void
 84reset_netjet_u(struct IsdnCardState *cs)
 85{
 86	cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
 87	byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 88	mdelay(10);
 89	cs->hw.njet.ctrl_reg = 0x40;  /* Reset Off and status read clear */
 90	/* now edge triggered for TJ320 GE 13/07/00 */
 91	byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 92	mdelay(10);
 93	cs->hw.njet.auxd = 0xC0;
 94	cs->hw.njet.dmactrl = 0;
 95	byteout(cs->hw.njet.auxa, 0);
 96	byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
 97	byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
 98	byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
 99}
100
101static int
102NETjet_U_card_msg(struct IsdnCardState *cs, int mt, void *arg)
103{
104	u_long flags;
105
106	switch (mt) {
107	case CARD_RESET:
108		spin_lock_irqsave(&cs->lock, flags);
109		reset_netjet_u(cs);
110		spin_unlock_irqrestore(&cs->lock, flags);
111		return (0);
112	case CARD_RELEASE:
113		release_io_netjet(cs);
114		return (0);
115	case CARD_INIT:
116		spin_lock_irqsave(&cs->lock, flags);
117		inittiger(cs);
118		reset_netjet_u(cs);
119		clear_pending_icc_ints(cs);
120		initicc(cs);
121		/* Reenable all IRQ */
122		cs->writeisac(cs, ICC_MASK, 0);
123		spin_unlock_irqrestore(&cs->lock, flags);
124		return (0);
125	case CARD_TEST:
126		return (0);
127	}
128	return (0);
129}
130
131static int nju_pci_probe(struct pci_dev *dev_netjet, struct IsdnCardState *cs)
132{
133	if (pci_enable_device(dev_netjet))
134		return (0);
135	pci_set_master(dev_netjet);
136	cs->irq = dev_netjet->irq;
137	if (!cs->irq) {
138		printk(KERN_WARNING "NETspider-U: No IRQ for PCI card found\n");
139		return (0);
140	}
141	cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
142	if (!cs->hw.njet.base) {
143		printk(KERN_WARNING "NETspider-U: No IO-Adr for PCI card found\n");
144		return (0);
145	}
146
147	return (1);
148}
149
150static int nju_cs_init(struct IsdnCard *card, struct IsdnCardState *cs)
151{
152	cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
153	cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF;
154	mdelay(10);
155
156	cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
157	byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
158	mdelay(10);
159
160	cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
161	byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
162	mdelay(10);
163
164	cs->hw.njet.auxd = 0xC0;
165	cs->hw.njet.dmactrl = 0;
166
167	byteout(cs->hw.njet.auxa, 0);
168	byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
169	byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
170	byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
171
172	switch (((NETjet_ReadIC(cs, ICC_RBCH) >> 5) & 3))
173	{
174	case 3:
175		return 1;	/* end loop */
176
177	case 0:
178		printk(KERN_WARNING "NETspider-U: NETjet-S PCI card found\n");
179		return -1;	/* continue looping */
180
181	default:
182		printk(KERN_WARNING "NETspider-U: No PCI card found\n");
183		return 0;	/* end loop & function */
184	}
185	return 1;			/* end loop */
186}
187
188static int nju_cs_init_rest(struct IsdnCard *card, struct IsdnCardState *cs)
189{
190	const int bytecnt = 256;
191
192	printk(KERN_INFO
193	       "NETspider-U: PCI card configured at %#lx IRQ %d\n",
194	       cs->hw.njet.base, cs->irq);
195	if (!request_region(cs->hw.njet.base, bytecnt, "netspider-u isdn")) {
196		printk(KERN_WARNING
197		       "HiSax: NETspider-U config port %#lx-%#lx "
198		       "already in use\n",
199		       cs->hw.njet.base,
200		       cs->hw.njet.base + bytecnt);
201		return (0);
202	}
203	setup_icc(cs);
204	cs->readisac  = &NETjet_ReadIC;
205	cs->writeisac = &NETjet_WriteIC;
206	cs->readisacfifo  = &NETjet_ReadICfifo;
207	cs->writeisacfifo = &NETjet_WriteICfifo;
208	cs->BC_Read_Reg  = &dummyrr;
209	cs->BC_Write_Reg = &dummywr;
210	cs->BC_Send_Data = &netjet_fill_dma;
211	cs->cardmsg = &NETjet_U_card_msg;
212	cs->irq_func = &netjet_u_interrupt;
213	cs->irq_flags |= IRQF_SHARED;
214	ICCVersion(cs, "NETspider-U:");
215
216	return (1);
217}
218
219static struct pci_dev *dev_netjet = NULL;
220
221int setup_netjet_u(struct IsdnCard *card)
222{
223	int ret;
224	struct IsdnCardState *cs = card->cs;
225	char tmp[64];
226
227#ifdef __BIG_ENDIAN
228#error "not running on big endian machines now"
229#endif
230
231	strcpy(tmp, NETjet_U_revision);
232	printk(KERN_INFO "HiSax: Traverse Tech. NETspider-U driver Rev. %s\n", HiSax_getrev(tmp));
233	if (cs->typ != ISDN_CTYPE_NETJET_U)
234		return (0);
235	test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
236
237	for (;;)
238	{
239		if ((dev_netjet = hisax_find_pci_device(PCI_VENDOR_ID_TIGERJET,
240							PCI_DEVICE_ID_TIGERJET_300,  dev_netjet))) {
241			ret = nju_pci_probe(dev_netjet, cs);
242			if (!ret)
243				return (0);
244		} else {
245			printk(KERN_WARNING "NETspider-U: No PCI card found\n");
246			return (0);
247		}
248
249		ret = nju_cs_init(card, cs);
250		if (!ret)
251			return (0);
252		if (ret > 0)
253			break;
254		/* ret < 0 == continue looping */
255	}
256
257	return nju_cs_init_rest(card, cs);
258}