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/drivers/isdn/hisax/isurf.c

http://github.com/mirrors/linux
C | 305 lines | 258 code | 28 blank | 19 comment | 34 complexity | 4f49497a4784e707afd9723a2f4061c4 MD5 | raw file
  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
 20static 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
 36static u_char
 37ReadISAC(struct IsdnCardState *cs, u_char offset)
 38{
 39	return (readb(cs->hw.isurf.isac + offset));
 40}
 41
 42static void
 43WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
 44{
 45	writeb(value, cs->hw.isurf.isac + offset); mb();
 46}
 47
 48static void
 49ReadISACfifo(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
 56static void
 57WriteISACfifo(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
 71static u_char
 72ReadISAR(struct IsdnCardState *cs, int mode, u_char offset)
 73{
 74	return (readb(cs->hw.isurf.isar + offset));
 75}
 76
 77static void
 78WriteISAR(struct IsdnCardState *cs, int mode, u_char offset, u_char value)
 79{
 80	writeb(value, cs->hw.isurf.isar + offset); mb();
 81}
 82
 83static irqreturn_t
 84isurf_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);
 93Start_ISAR:
 94	if (val & ISAR_IRQSTA)
 95		isar_int_main(cs);
 96	val = readb(cs->hw.isurf.isac + ISAC_ISTA);
 97Start_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
123static void
124release_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
131static void
132reset_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
142static int
143ISurf_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
175static int
176isurf_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__
197static struct pnp_card *pnp_c = NULL;
198#endif
199
200int 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 || !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}