1 /* $Id: isurf.c,v 1.12.2.4 2004/01/13 21:46:03 keil Exp $
2 *
3 * low level stuff for Siemens I-Surf/I-Talk cards
4 *
5 * Author Karsten Keil
6 * Copyright by Karsten Keil <keil@isdn4linux.de>
7 *
8 * This software may be used and distributed according to the terms
9 * of the GNU General Public License, incorporated herein by reference.
10 *
11 */
12
13 #include <linux/init.h>
14 #include "hisax.h"
15 #include "isac.h"
16 #include "isar.h"
17 #include "isdnl1.h"
18 #include <linux/isapnp.h>
19
20 static const char *ISurf_revision = "$Revision: 1.12.2.4 $";
21
22 #define byteout(addr, val) outb(val, addr)
23 #define bytein(addr) inb(addr)
24
25 #define ISURF_ISAR_RESET 1
26 #define ISURF_ISAC_RESET 2
27 #define ISURF_ISAR_EA 4
28 #define ISURF_ARCOFI_RESET 8
29 #define ISURF_RESET (ISURF_ISAR_RESET | ISURF_ISAC_RESET | ISURF_ARCOFI_RESET)
30
31 #define ISURF_ISAR_OFFSET 0
32 #define ISURF_ISAC_OFFSET 0x100
33 #define ISURF_IOMEM_SIZE 0x400
34 /* Interface functions */
35
36 static u_char
ReadISAC(struct IsdnCardState * cs,u_char offset)37 ReadISAC(struct IsdnCardState *cs, u_char offset)
38 {
39 return (readb(cs->hw.isurf.isac + offset));
40 }
41
42 static void
WriteISAC(struct IsdnCardState * cs,u_char offset,u_char value)43 WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
44 {
45 writeb(value, cs->hw.isurf.isac + offset); mb();
46 }
47
48 static void
ReadISACfifo(struct IsdnCardState * cs,u_char * data,int size)49 ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size)
50 {
51 register int i;
52 for (i = 0; i < size; i++)
53 data[i] = readb(cs->hw.isurf.isac);
54 }
55
56 static void
WriteISACfifo(struct IsdnCardState * cs,u_char * data,int size)57 WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size)
58 {
59 register int i;
60 for (i = 0; i < size; i++) {
61 writeb(data[i], cs->hw.isurf.isac); mb();
62 }
63 }
64
65 /* ISAR access routines
66 * mode = 0 access with IRQ on
67 * mode = 1 access with IRQ off
68 * mode = 2 access with IRQ off and using last offset
69 */
70
71 static u_char
ReadISAR(struct IsdnCardState * cs,int mode,u_char offset)72 ReadISAR(struct IsdnCardState *cs, int mode, u_char offset)
73 {
74 return (readb(cs->hw.isurf.isar + offset));
75 }
76
77 static void
WriteISAR(struct IsdnCardState * cs,int mode,u_char offset,u_char value)78 WriteISAR(struct IsdnCardState *cs, int mode, u_char offset, u_char value)
79 {
80 writeb(value, cs->hw.isurf.isar + offset); mb();
81 }
82
83 static irqreturn_t
isurf_interrupt(int intno,void * dev_id)84 isurf_interrupt(int intno, void *dev_id)
85 {
86 struct IsdnCardState *cs = dev_id;
87 u_char val;
88 int cnt = 5;
89 u_long flags;
90
91 spin_lock_irqsave(&cs->lock, flags);
92 val = readb(cs->hw.isurf.isar + ISAR_IRQBIT);
93 Start_ISAR:
94 if (val & ISAR_IRQSTA)
95 isar_int_main(cs);
96 val = readb(cs->hw.isurf.isac + ISAC_ISTA);
97 Start_ISAC:
98 if (val)
99 isac_interrupt(cs, val);
100 val = readb(cs->hw.isurf.isar + ISAR_IRQBIT);
101 if ((val & ISAR_IRQSTA) && --cnt) {
102 if (cs->debug & L1_DEB_HSCX)
103 debugl1(cs, "ISAR IntStat after IntRoutine");
104 goto Start_ISAR;
105 }
106 val = readb(cs->hw.isurf.isac + ISAC_ISTA);
107 if (val && --cnt) {
108 if (cs->debug & L1_DEB_ISAC)
109 debugl1(cs, "ISAC IntStat after IntRoutine");
110 goto Start_ISAC;
111 }
112 if (!cnt)
113 printk(KERN_WARNING "ISurf IRQ LOOP\n");
114
115 writeb(0, cs->hw.isurf.isar + ISAR_IRQBIT); mb();
116 writeb(0xFF, cs->hw.isurf.isac + ISAC_MASK); mb();
117 writeb(0, cs->hw.isurf.isac + ISAC_MASK); mb();
118 writeb(ISAR_IRQMSK, cs->hw.isurf.isar + ISAR_IRQBIT); mb();
119 spin_unlock_irqrestore(&cs->lock, flags);
120 return IRQ_HANDLED;
121 }
122
123 static void
release_io_isurf(struct IsdnCardState * cs)124 release_io_isurf(struct IsdnCardState *cs)
125 {
126 release_region(cs->hw.isurf.reset, 1);
127 iounmap(cs->hw.isurf.isar);
128 release_mem_region(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE);
129 }
130
131 static void
reset_isurf(struct IsdnCardState * cs,u_char chips)132 reset_isurf(struct IsdnCardState *cs, u_char chips)
133 {
134 printk(KERN_INFO "ISurf: resetting card\n");
135
136 byteout(cs->hw.isurf.reset, chips); /* Reset On */
137 mdelay(10);
138 byteout(cs->hw.isurf.reset, ISURF_ISAR_EA); /* Reset Off */
139 mdelay(10);
140 }
141
142 static int
ISurf_card_msg(struct IsdnCardState * cs,int mt,void * arg)143 ISurf_card_msg(struct IsdnCardState *cs, int mt, void *arg)
144 {
145 u_long flags;
146
147 switch (mt) {
148 case CARD_RESET:
149 spin_lock_irqsave(&cs->lock, flags);
150 reset_isurf(cs, ISURF_RESET);
151 spin_unlock_irqrestore(&cs->lock, flags);
152 return (0);
153 case CARD_RELEASE:
154 release_io_isurf(cs);
155 return (0);
156 case CARD_INIT:
157 spin_lock_irqsave(&cs->lock, flags);
158 reset_isurf(cs, ISURF_RESET);
159 clear_pending_isac_ints(cs);
160 writeb(0, cs->hw.isurf.isar + ISAR_IRQBIT); mb();
161 initisac(cs);
162 initisar(cs);
163 /* Reenable ISAC IRQ */
164 cs->writeisac(cs, ISAC_MASK, 0);
165 /* RESET Receiver and Transmitter */
166 cs->writeisac(cs, ISAC_CMDR, 0x41);
167 spin_unlock_irqrestore(&cs->lock, flags);
168 return (0);
169 case CARD_TEST:
170 return (0);
171 }
172 return (0);
173 }
174
175 static int
isurf_auxcmd(struct IsdnCardState * cs,isdn_ctrl * ic)176 isurf_auxcmd(struct IsdnCardState *cs, isdn_ctrl *ic) {
177 int ret;
178 u_long flags;
179
180 if ((ic->command == ISDN_CMD_IOCTL) && (ic->arg == 9)) {
181 ret = isar_auxcmd(cs, ic);
182 spin_lock_irqsave(&cs->lock, flags);
183 if (!ret) {
184 reset_isurf(cs, ISURF_ISAR_EA | ISURF_ISAC_RESET |
185 ISURF_ARCOFI_RESET);
186 initisac(cs);
187 cs->writeisac(cs, ISAC_MASK, 0);
188 cs->writeisac(cs, ISAC_CMDR, 0x41);
189 }
190 spin_unlock_irqrestore(&cs->lock, flags);
191 return (ret);
192 }
193 return (isar_auxcmd(cs, ic));
194 }
195
196 #ifdef __ISAPNP__
197 static struct pnp_card *pnp_c = NULL;
198 #endif
199
setup_isurf(struct IsdnCard * card)200 int setup_isurf(struct IsdnCard *card)
201 {
202 int ver;
203 struct IsdnCardState *cs = card->cs;
204 char tmp[64];
205
206 strcpy(tmp, ISurf_revision);
207 printk(KERN_INFO "HiSax: ISurf driver Rev. %s\n", HiSax_getrev(tmp));
208
209 if (cs->typ != ISDN_CTYPE_ISURF)
210 return (0);
211 if (card->para[1] && card->para[2]) {
212 cs->hw.isurf.reset = card->para[1];
213 cs->hw.isurf.phymem = card->para[2];
214 cs->irq = card->para[0];
215 } else {
216 #ifdef __ISAPNP__
217 if (isapnp_present()) {
218 struct pnp_dev *pnp_d = NULL;
219 int err;
220
221 cs->subtyp = 0;
222 if ((pnp_c = pnp_find_card(
223 ISAPNP_VENDOR('S', 'I', 'E'),
224 ISAPNP_FUNCTION(0x0010), pnp_c))) {
225 if (!(pnp_d = pnp_find_dev(pnp_c,
226 ISAPNP_VENDOR('S', 'I', 'E'),
227 ISAPNP_FUNCTION(0x0010), pnp_d))) {
228 printk(KERN_ERR "ISurfPnP: PnP error card found, no device\n");
229 return (0);
230 }
231 pnp_disable_dev(pnp_d);
232 err = pnp_activate_dev(pnp_d);
233 if (err < 0) {
234 pr_warn("%s: pnp_activate_dev ret=%d\n",
235 __func__, err);
236 return 0;
237 }
238 cs->hw.isurf.reset = pnp_port_start(pnp_d, 0);
239 cs->hw.isurf.phymem = pnp_mem_start(pnp_d, 1);
240 cs->irq = pnp_irq(pnp_d, 0);
241 if (cs->irq == -1 || !cs->hw.isurf.reset || !cs->hw.isurf.phymem) {
242 printk(KERN_ERR "ISurfPnP:some resources are missing %d/%x/%lx\n",
243 cs->irq, cs->hw.isurf.reset, cs->hw.isurf.phymem);
244 pnp_disable_dev(pnp_d);
245 return (0);
246 }
247 } else {
248 printk(KERN_INFO "ISurfPnP: no ISAPnP card found\n");
249 return (0);
250 }
251 } else {
252 printk(KERN_INFO "ISurfPnP: no ISAPnP bus found\n");
253 return (0);
254 }
255 #else
256 printk(KERN_WARNING "HiSax: Siemens I-Surf port/mem not set\n");
257 return (0);
258 #endif
259 }
260 if (!request_region(cs->hw.isurf.reset, 1, "isurf isdn")) {
261 printk(KERN_WARNING
262 "HiSax: Siemens I-Surf config port %x already in use\n",
263 cs->hw.isurf.reset);
264 return (0);
265 }
266 if (!request_region(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE, "isurf iomem")) {
267 printk(KERN_WARNING "HiSax: Siemens I-Surf memory region "
268 "%lx-%lx already in use\n",
269 cs->hw.isurf.phymem,
270 cs->hw.isurf.phymem + ISURF_IOMEM_SIZE);
271 release_region(cs->hw.isurf.reset, 1);
272 return (0);
273 }
274 cs->hw.isurf.isar = ioremap(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE);
275 cs->hw.isurf.isac = cs->hw.isurf.isar + ISURF_ISAC_OFFSET;
276 printk(KERN_INFO
277 "ISurf: defined at 0x%x 0x%lx IRQ %d\n",
278 cs->hw.isurf.reset,
279 cs->hw.isurf.phymem,
280 cs->irq);
281
282 setup_isac(cs);
283 cs->cardmsg = &ISurf_card_msg;
284 cs->irq_func = &isurf_interrupt;
285 cs->auxcmd = &isurf_auxcmd;
286 cs->readisac = &ReadISAC;
287 cs->writeisac = &WriteISAC;
288 cs->readisacfifo = &ReadISACfifo;
289 cs->writeisacfifo = &WriteISACfifo;
290 cs->bcs[0].hw.isar.reg = &cs->hw.isurf.isar_r;
291 cs->bcs[1].hw.isar.reg = &cs->hw.isurf.isar_r;
292 test_and_set_bit(HW_ISAR, &cs->HW_Flags);
293 ISACVersion(cs, "ISurf:");
294 cs->BC_Read_Reg = &ReadISAR;
295 cs->BC_Write_Reg = &WriteISAR;
296 cs->BC_Send_Data = &isar_fill_fifo;
297 ver = ISARVersion(cs, "ISurf:");
298 if (ver < 0) {
299 printk(KERN_WARNING
300 "ISurf: wrong ISAR version (ret = %d)\n", ver);
301 release_io_isurf(cs);
302 return (0);
303 }
304 return (1);
305 }
306