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/drivers/isdn/hisax/isurf.c

https://bitbucket.org/ndreys/linux-sunxi
C | 301 lines | 254 code | 28 blank | 19 comment | 33 complexity | a08e97f9012ec19bb25a9b55bed05f46 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  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);
 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
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 __devinitdata = NULL;
198#endif
199
200int __devinit
201setup_isurf(struct IsdnCard *card)
202{
203	int ver;
204	struct IsdnCardState *cs = card->cs;
205	char tmp[64];
206
207	strcpy(tmp, ISurf_revision);
208	printk(KERN_INFO "HiSax: ISurf driver Rev. %s\n", HiSax_getrev(tmp));
209	
210 	if (cs->typ != ISDN_CTYPE_ISURF)
211 		return(0);
212	if (card->para[1] && card->para[2]) {
213		cs->hw.isurf.reset = card->para[1];
214		cs->hw.isurf.phymem = card->para[2];
215		cs->irq = card->para[0];
216	} else {
217#ifdef __ISAPNP__
218		if (isapnp_present()) {
219			struct pnp_dev *pnp_d = NULL;
220			int err;
221
222			cs->subtyp = 0;
223			if ((pnp_c = pnp_find_card(
224				ISAPNP_VENDOR('S', 'I', 'E'),
225				ISAPNP_FUNCTION(0x0010), pnp_c))) {
226				if (!(pnp_d = pnp_find_dev(pnp_c,
227					ISAPNP_VENDOR('S', 'I', 'E'),
228					ISAPNP_FUNCTION(0x0010), pnp_d))) {
229					printk(KERN_ERR "ISurfPnP: PnP error card found, no device\n");
230					return (0);
231				}
232				pnp_disable_dev(pnp_d);
233				err = pnp_activate_dev(pnp_d);
234				cs->hw.isurf.reset = pnp_port_start(pnp_d, 0);
235				cs->hw.isurf.phymem = pnp_mem_start(pnp_d, 1);
236				cs->irq = pnp_irq(pnp_d, 0);
237				if (!cs->irq || !cs->hw.isurf.reset || !cs->hw.isurf.phymem) {
238					printk(KERN_ERR "ISurfPnP:some resources are missing %d/%x/%lx\n",
239						cs->irq, cs->hw.isurf.reset, cs->hw.isurf.phymem);
240					pnp_disable_dev(pnp_d);
241					return(0);
242				}
243			} else {
244				printk(KERN_INFO "ISurfPnP: no ISAPnP card found\n");
245				return(0);
246			}
247		} else {
248			printk(KERN_INFO "ISurfPnP: no ISAPnP bus found\n");
249			return(0);
250		}
251#else
252		printk(KERN_WARNING "HiSax: Siemens I-Surf port/mem not set\n");
253		return (0);
254#endif
255	}
256	if (!request_region(cs->hw.isurf.reset, 1, "isurf isdn")) {
257		printk(KERN_WARNING
258			"HiSax: Siemens I-Surf config port %x already in use\n",
259			cs->hw.isurf.reset);
260			return (0);
261	}
262	if (!request_region(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE, "isurf iomem")) {
263		printk(KERN_WARNING "HiSax: Siemens I-Surf memory region "
264			"%lx-%lx already in use\n",
265			cs->hw.isurf.phymem,
266			cs->hw.isurf.phymem + ISURF_IOMEM_SIZE);
267		release_region(cs->hw.isurf.reset, 1);
268		return (0);
269	}
270	cs->hw.isurf.isar = ioremap(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE);
271	cs->hw.isurf.isac = cs->hw.isurf.isar + ISURF_ISAC_OFFSET;
272	printk(KERN_INFO
273	       "ISurf: defined at 0x%x 0x%lx IRQ %d\n",
274	       cs->hw.isurf.reset,
275	       cs->hw.isurf.phymem,
276	       cs->irq);
277
278	setup_isac(cs);
279	cs->cardmsg = &ISurf_card_msg;
280	cs->irq_func = &isurf_interrupt;
281	cs->auxcmd = &isurf_auxcmd;
282	cs->readisac = &ReadISAC;
283	cs->writeisac = &WriteISAC;
284	cs->readisacfifo = &ReadISACfifo;
285	cs->writeisacfifo = &WriteISACfifo;
286	cs->bcs[0].hw.isar.reg = &cs->hw.isurf.isar_r;
287	cs->bcs[1].hw.isar.reg = &cs->hw.isurf.isar_r;
288	test_and_set_bit(HW_ISAR, &cs->HW_Flags);
289	ISACVersion(cs, "ISurf:");
290	cs->BC_Read_Reg = &ReadISAR;
291	cs->BC_Write_Reg = &WriteISAR;
292	cs->BC_Send_Data = &isar_fill_fifo;
293	ver = ISARVersion(cs, "ISurf:");
294	if (ver < 0) {
295		printk(KERN_WARNING
296			"ISurf: wrong ISAR version (ret = %d)\n", ver);
297		release_io_isurf(cs);
298		return (0);
299	}
300	return (1);
301}