Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[linux-2.6] / drivers / isdn / hisax / nj_u.c
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
17 static const char *NETjet_U_revision = "$Revision: 2.14.2.3 $";
18
19 static u_char dummyrr(struct IsdnCardState *cs, int chan, u_char off)
20 {
21         return(5);
22 }
23
24 static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value)
25 {
26 }
27
28 static irqreturn_t
29 netjet_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
83 static void
84 reset_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
101 static int
102 NETjet_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
131 static int __devinit nju_pci_probe(struct pci_dev *dev_netjet,
132                                    struct IsdnCardState *cs)
133 {
134         if (pci_enable_device(dev_netjet))
135                 return(0);
136         pci_set_master(dev_netjet);
137         cs->irq = dev_netjet->irq;
138         if (!cs->irq) {
139                 printk(KERN_WARNING "NETspider-U: No IRQ for PCI card found\n");
140                 return(0);
141         }
142         cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
143         if (!cs->hw.njet.base) {
144                 printk(KERN_WARNING "NETspider-U: No IO-Adr for PCI card found\n");
145                 return(0);
146         }
147
148         return (1);
149 }
150
151 static int __devinit nju_cs_init(struct IsdnCard *card,
152                                  struct IsdnCardState *cs)
153 {
154         cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
155         cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF;
156         mdelay(10);
157
158         cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
159         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
160         mdelay(10);
161
162         cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
163         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
164         mdelay(10);
165
166         cs->hw.njet.auxd = 0xC0;
167         cs->hw.njet.dmactrl = 0;
168
169         byteout(cs->hw.njet.auxa, 0);
170         byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
171         byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
172         byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
173
174         switch ( ( ( NETjet_ReadIC( cs, ICC_RBCH ) >> 5 ) & 3 ) )
175         {
176                 case 3 :
177                         return 1;       /* end loop */
178
179                 case 0 :
180                         printk( KERN_WARNING "NETspider-U: NETjet-S PCI card found\n" );
181                         return -1;      /* continue looping */
182
183                 default :
184                         printk( KERN_WARNING "NETspider-U: No PCI card found\n" );
185                         return 0;       /* end loop & function */
186         }
187         return 1;                       /* end loop */
188 }
189
190 static int __devinit nju_cs_init_rest(struct IsdnCard *card,
191                                       struct IsdnCardState *cs)
192 {
193         const int bytecnt = 256;
194
195         printk(KERN_INFO
196                 "NETspider-U: PCI card configured at %#lx IRQ %d\n",
197                 cs->hw.njet.base, cs->irq);
198         if (!request_region(cs->hw.njet.base, bytecnt, "netspider-u isdn")) {
199                 printk(KERN_WARNING
200                        "HiSax: NETspider-U config port %#lx-%#lx "
201                        "already in use\n",
202                        cs->hw.njet.base,
203                        cs->hw.njet.base + bytecnt);
204                 return (0);
205         }
206         setup_icc(cs);
207         cs->readisac  = &NETjet_ReadIC;
208         cs->writeisac = &NETjet_WriteIC;
209         cs->readisacfifo  = &NETjet_ReadICfifo;
210         cs->writeisacfifo = &NETjet_WriteICfifo;
211         cs->BC_Read_Reg  = &dummyrr;
212         cs->BC_Write_Reg = &dummywr;
213         cs->BC_Send_Data = &netjet_fill_dma;
214         cs->cardmsg = &NETjet_U_card_msg;
215         cs->irq_func = &netjet_u_interrupt;
216         cs->irq_flags |= IRQF_SHARED;
217         ICCVersion(cs, "NETspider-U:");
218
219         return (1);
220 }
221
222 static struct pci_dev *dev_netjet __devinitdata = NULL;
223
224 int __devinit
225 setup_netjet_u(struct IsdnCard *card)
226 {
227         int ret;
228         struct IsdnCardState *cs = card->cs;
229         char tmp[64];
230
231 #ifdef __BIG_ENDIAN
232 #error "not running on big endian machines now"
233 #endif
234
235         strcpy(tmp, NETjet_U_revision);
236         printk(KERN_INFO "HiSax: Traverse Tech. NETspider-U driver Rev. %s\n", HiSax_getrev(tmp));
237         if (cs->typ != ISDN_CTYPE_NETJET_U)
238                 return(0);
239         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
240
241         for ( ;; )
242         {
243                 if ((dev_netjet = pci_find_device(PCI_VENDOR_ID_TIGERJET,
244                         PCI_DEVICE_ID_TIGERJET_300,  dev_netjet))) {
245                         ret = nju_pci_probe(dev_netjet, cs);
246                         if (!ret)
247                                 return(0);
248                 } else {
249                         printk(KERN_WARNING "NETspider-U: No PCI card found\n");
250                         return(0);
251                 }
252
253                 ret = nju_cs_init(card, cs);
254                 if (!ret)
255                         return (0);
256                 if (ret > 0)
257                         break;
258                 /* ret < 0 == continue looping */
259         }
260
261         return nju_cs_init_rest(card, cs);
262 }