1/* $Id: nj_s.c,v 1.1.1.1 2008/10/15 03:26:33 james26_jang 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#define __NO_VERSION__
9#include <linux/config.h>
10#include <linux/init.h>
11#include "hisax.h"
12#include "isac.h"
13#include "isdnl1.h"
14#include <linux/pci.h>
15#include <linux/interrupt.h>
16#include <linux/ppp_defs.h>
17#include "netjet.h"
18
19const char *NETjet_S_revision = "$Revision: 1.1.1.1 $";
20
21static u_char dummyrr(struct IsdnCardState *cs, int chan, u_char off)
22{
23	return(5);
24}
25
26static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value)
27{
28}
29
30static void
31netjet_s_interrupt(int intno, void *dev_id, struct pt_regs *regs)
32{
33	struct IsdnCardState *cs = dev_id;
34	u_char val, sval;
35	long flags;
36
37	if (!cs) {
38		printk(KERN_WARNING "NETjet-S: Spurious interrupt!\n");
39		return;
40	}
41	if (!((sval = bytein(cs->hw.njet.base + NETJET_IRQSTAT1)) &
42		NETJET_ISACIRQ)) {
43		val = NETjet_ReadIC(cs, ISAC_ISTA);
44		if (cs->debug & L1_DEB_ISAC)
45			debugl1(cs, "tiger: i1 %x %x", sval, val);
46		if (val) {
47			isac_interrupt(cs, val);
48			NETjet_WriteIC(cs, ISAC_MASK, 0xFF);
49			NETjet_WriteIC(cs, ISAC_MASK, 0x0);
50		}
51	}
52	save_flags(flags);
53	cli();
54	/* start new code 13/07/00 GE */
55	/* set bits in sval to indicate which page is free */
56	if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) <
57		inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ))
58		/* the 2nd write page is free */
59		sval = 0x08;
60	else	/* the 1st write page is free */
61		sval = 0x04;
62	if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) <
63		inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ))
64		/* the 2nd read page is free */
65		sval = sval | 0x02;
66	else	/* the 1st read page is free */
67		sval = sval | 0x01;
68	if (sval != cs->hw.njet.last_is0) /* we have a DMA interrupt */
69	{
70		if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
71			restore_flags(flags);
72			return;
73		}
74		cs->hw.njet.irqstat0 = sval;
75		restore_flags(flags);
76		if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) !=
77			(cs->hw.njet.last_is0 & NETJET_IRQM0_READ))
78			/* we have a read dma int */
79			read_tiger(cs);
80		if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) !=
81			(cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE))
82			/* we have a write dma int */
83			write_tiger(cs);
84		/* end new code 13/07/00 GE */
85		test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
86	} else
87		restore_flags(flags);
88
89/*	if (!testcnt--) {
90		cs->hw.njet.dmactrl = 0;
91		byteout(cs->hw.njet.base + NETJET_DMACTRL,
92			cs->hw.njet.dmactrl);
93		byteout(cs->hw.njet.base + NETJET_IRQMASK0, 0);
94	}
95*/
96}
97
98static void
99reset_netjet_s(struct IsdnCardState *cs)
100{
101	long flags;
102
103	save_flags(flags);
104	sti();
105	cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
106	byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
107	set_current_state(TASK_UNINTERRUPTIBLE);
108	schedule_timeout((10*HZ)/1000);	/* Timeout 10ms */
109	cs->hw.njet.ctrl_reg = 0x40;  /* Reset Off and status read clear */
110	/* now edge triggered for TJ320 GE 13/07/00 */
111	byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
112	set_current_state(TASK_UNINTERRUPTIBLE);
113	schedule_timeout((10*HZ)/1000);	/* Timeout 10ms */
114	restore_flags(flags);
115	cs->hw.njet.auxd = 0;
116	cs->hw.njet.dmactrl = 0;
117	byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
118	byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
119	byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
120}
121
122static int
123NETjet_S_card_msg(struct IsdnCardState *cs, int mt, void *arg)
124{
125	switch (mt) {
126		case CARD_RESET:
127			reset_netjet_s(cs);
128			return(0);
129		case CARD_RELEASE:
130			release_io_netjet(cs);
131			return(0);
132		case CARD_INIT:
133			inittiger(cs);
134			clear_pending_isac_ints(cs);
135			initisac(cs);
136			/* Reenable all IRQ */
137			cs->writeisac(cs, ISAC_MASK, 0);
138			return(0);
139		case CARD_TEST:
140			return(0);
141	}
142	return(0);
143}
144
145static struct pci_dev *dev_netjet __initdata = NULL;
146
147int __init
148setup_netjet_s(struct IsdnCard *card)
149{
150	int bytecnt;
151	struct IsdnCardState *cs = card->cs;
152	char tmp[64];
153	long flags;
154
155#ifdef __BIG_ENDIAN
156#error "not running on big endian machines now"
157#endif
158	strcpy(tmp, NETjet_S_revision);
159	printk(KERN_INFO "HiSax: Traverse Tech. NETjet-S driver Rev. %s\n", HiSax_getrev(tmp));
160	if (cs->typ != ISDN_CTYPE_NETJET_S)
161		return(0);
162	test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
163
164#if CONFIG_PCI
165
166	for ( ;; )
167	{
168		if (!pci_present()) {
169			printk(KERN_ERR "Netjet: no PCI bus present\n");
170			return(0);
171		}
172		if ((dev_netjet = pci_find_device(PCI_VENDOR_ID_TIGERJET,
173			PCI_DEVICE_ID_TIGERJET_300,  dev_netjet))) {
174			if (pci_enable_device(dev_netjet))
175				return(0);
176			pci_set_master(dev_netjet);
177			cs->irq = dev_netjet->irq;
178			if (!cs->irq) {
179				printk(KERN_WARNING "NETjet-S: No IRQ for PCI card found\n");
180				return(0);
181			}
182			cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
183			if (!cs->hw.njet.base) {
184				printk(KERN_WARNING "NETjet-S: No IO-Adr for PCI card found\n");
185				return(0);
186			}
187			/* 2001/10/04 Christoph Ersfeld, Formula-n Europe AG www.formula-n.com */
188			if ((dev_netjet->subsystem_vendor == 0x55) &&
189				(dev_netjet->subsystem_device == 0x02)) {
190				printk(KERN_WARNING "Netjet: You tried to load this driver with an incompatible TigerJet-card\n");
191				printk(KERN_WARNING "Use type=41 for Formula-n enter:now ISDN PCI and compatible\n");
192				return(0);
193			}
194			/* end new code */
195		} else {
196			printk(KERN_WARNING "NETjet-S: No PCI card found\n");
197			return(0);
198		}
199
200		cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
201		cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF;
202
203		save_flags(flags);
204		sti();
205
206		cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
207		byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
208
209		set_current_state(TASK_UNINTERRUPTIBLE);
210		schedule_timeout((10*HZ)/1000);	/* Timeout 10ms */
211
212		cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
213		byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
214
215		set_current_state(TASK_UNINTERRUPTIBLE);
216		schedule_timeout((10*HZ)/1000);	/* Timeout 10ms */
217
218		restore_flags(flags);
219
220		cs->hw.njet.auxd = 0xC0;
221		cs->hw.njet.dmactrl = 0;
222
223		byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
224		byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
225		byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
226
227		switch ( ( ( NETjet_ReadIC( cs, ISAC_RBCH ) >> 5 ) & 3 ) )
228		{
229			case 0 :
230				break;
231
232			case 3 :
233				printk( KERN_WARNING "NETjet-S: NETspider-U PCI card found\n" );
234				continue;
235
236			default :
237				printk( KERN_WARNING "NETjet-S: No PCI card found\n" );
238				return 0;
239                }
240                break;
241	}
242#else
243
244	printk(KERN_WARNING "NETjet-S: NO_PCI_BIOS\n");
245	printk(KERN_WARNING "NETjet-S: unable to config NETJET-S PCI\n");
246	return (0);
247
248#endif /* CONFIG_PCI */
249
250	bytecnt = 256;
251
252	printk(KERN_INFO
253		"NETjet-S: PCI card configured at %#lx IRQ %d\n",
254		cs->hw.njet.base, cs->irq);
255	if (check_region(cs->hw.njet.base, bytecnt)) {
256		printk(KERN_WARNING
257		       "HiSax: %s config port %#lx-%#lx already in use\n",
258		       CardType[card->typ],
259		       cs->hw.njet.base,
260		       cs->hw.njet.base + bytecnt);
261		return (0);
262	} else {
263		request_region(cs->hw.njet.base, bytecnt, "netjet-s isdn");
264	}
265	reset_netjet_s(cs);
266	cs->readisac  = &NETjet_ReadIC;
267	cs->writeisac = &NETjet_WriteIC;
268	cs->readisacfifo  = &NETjet_ReadICfifo;
269	cs->writeisacfifo = &NETjet_WriteICfifo;
270	cs->BC_Read_Reg  = &dummyrr;
271	cs->BC_Write_Reg = &dummywr;
272	cs->BC_Send_Data = &netjet_fill_dma;
273	cs->cardmsg = &NETjet_S_card_msg;
274	cs->irq_func = &netjet_s_interrupt;
275	cs->irq_flags |= SA_SHIRQ;
276	ISACVersion(cs, "NETjet-S:");
277	return (1);
278}
279