paride.c
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上传日期:2013-04-10
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文件大小:11k
- /*
- paride.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
- Under the terms of the GNU General Public License.
- This is the base module for the family of device drivers
- that support parallel port IDE devices.
- */
- /* Changes:
- 1.01 GRG 1998.05.03 Use spinlocks
- 1.02 GRG 1998.05.05 init_proto, release_proto, ktti
- 1.03 GRG 1998.08.15 eliminate compiler warning
- 1.04 GRG 1998.11.28 added support for FRIQ
- 1.05 TMW 2000.06.06 use parport_find_number instead of
- parport_enumerate
- 1.06 TMW 2001.03.26 more sane parport-or-not resource management
- */
- #define PI_VERSION "1.06"
- #include <linux/module.h>
- #include <linux/config.h>
- #include <linux/kmod.h>
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/ioport.h>
- #include <linux/string.h>
- #include <linux/spinlock.h>
- #include <linux/wait.h>
- #ifdef CONFIG_PARPORT_MODULE
- #define CONFIG_PARPORT
- #endif
- #ifdef CONFIG_PARPORT
- #include <linux/parport.h>
- #endif
- #include "paride.h"
- #define MAX_PROTOS 32
- static struct pi_protocol *protocols[MAX_PROTOS];
- static spinlock_t pi_spinlock = SPIN_LOCK_UNLOCKED;
- void pi_write_regr( PIA *pi, int cont, int regr, int val)
- { pi->proto->write_regr(pi,cont,regr,val);
- }
- int pi_read_regr( PIA *pi, int cont, int regr)
- { return pi->proto->read_regr(pi,cont,regr);
- }
- void pi_write_block( PIA *pi, char * buf, int count)
- { pi->proto->write_block(pi,buf,count);
- }
- void pi_read_block( PIA *pi, char * buf, int count)
- { pi->proto->read_block(pi,buf,count);
- }
- #ifdef CONFIG_PARPORT
- static void pi_wake_up( void *p)
- { PIA *pi = (PIA *) p;
- unsigned long flags;
- void (*cont)(void) = NULL;
- spin_lock_irqsave(&pi_spinlock,flags);
- if (pi->claim_cont && !parport_claim(pi->pardev)) {
- cont = pi->claim_cont;
- pi->claim_cont = NULL;
- pi->claimed = 1;
- }
- spin_unlock_irqrestore(&pi_spinlock,flags);
- wake_up(&(pi->parq));
- if (cont) cont();
- }
- #endif
- void pi_do_claimed( PIA *pi, void(*cont)(void))
- #ifdef CONFIG_PARPORT
- { unsigned long flags;
- spin_lock_irqsave(&pi_spinlock,flags);
- if (!pi->pardev || !parport_claim(pi->pardev)) {
- pi->claimed = 1;
- spin_unlock_irqrestore(&pi_spinlock,flags);
- cont();
- } else {
- pi->claim_cont = cont;
- spin_unlock_irqrestore(&pi_spinlock,flags);
- }
- }
- #else
- { cont();
- }
- #endif
- static void pi_claim( PIA *pi)
- { if (pi->claimed) return;
- pi->claimed = 1;
- #ifdef CONFIG_PARPORT
- if (pi->pardev)
- wait_event (pi->parq,
- !parport_claim ((struct pardevice *)pi->pardev));
- #endif
- }
- static void pi_unclaim( PIA *pi)
- { pi->claimed = 0;
- #ifdef CONFIG_PARPORT
- if (pi->pardev) parport_release((struct pardevice *)(pi->pardev));
- #endif
- }
- void pi_connect( PIA *pi)
- { pi_claim(pi);
- pi->proto->connect(pi);
- }
- void pi_disconnect( PIA *pi)
- { pi->proto->disconnect(pi);
- pi_unclaim(pi);
- }
- static void pi_unregister_parport( PIA *pi)
- {
- #ifdef CONFIG_PARPORT
- if (pi->pardev) {
- parport_unregister_device((struct pardevice *)(pi->pardev));
- pi->pardev = NULL;
- }
- #endif
- }
- void pi_release( PIA *pi)
- { pi_unregister_parport(pi);
- #ifndef CONFIG_PARPORT
- if (pi->reserved)
- release_region(pi->port,pi->reserved);
- #endif /* !CONFIG_PARPORT */
- pi->proto->release_proto(pi);
- }
- #define WR(r,v) pi_write_regr(pi,0,r,v)
- #define RR(r) (pi_read_regr(pi,0,r))
- static int pi_test_proto( PIA *pi, char * scratch, int verbose )
- { int j, k;
- int e[2] = {0,0};
- if (pi->proto->test_proto) {
- pi_claim(pi);
- j = pi->proto->test_proto(pi,scratch,verbose);
- pi_unclaim(pi);
- return j;
- }
- pi_connect(pi);
- for (j=0;j<2;j++) {
- WR(6,0xa0+j*0x10);
- for (k=0;k<256;k++) {
- WR(2,k^0xaa);
- WR(3,k^0x55);
- if (RR(2) != (k^0xaa)) e[j]++;
- }
- }
- pi_disconnect(pi);
- if (verbose)
- printk("%s: %s: port 0x%x, mode %d, test=(%d,%d)n",
- pi->device,pi->proto->name,pi->port,
- pi->mode,e[0],e[1]);
- return (e[0] && e[1]); /* not here if both > 0 */
- }
- int pi_register( PIP *pr)
- { int k;
- for (k=0;k<MAX_PROTOS;k++)
- if (protocols[k] && !strcmp(pr->name,protocols[k]->name)) {
- printk("paride: %s protocol already registeredn",pr->name);
- return 0;
- }
- k = 0;
- while((k<MAX_PROTOS) && (protocols[k])) k++;
- if (k == MAX_PROTOS) {
- printk("paride: protocol table fulln");
- return 0;
- }
- MOD_INC_USE_COUNT;
- protocols[k] = pr;
- pr->index = k;
- printk("paride: %s registered as protocol %dn",pr->name,k);
- return 1;
- }
- void pi_unregister( PIP *pr)
- { if (!pr) return;
- if (protocols[pr->index] != pr) {
- printk("paride: %s not registeredn",pr->name);
- return;
- }
- protocols[pr->index] = 0;
- MOD_DEC_USE_COUNT;
- }
- static int pi_register_parport( PIA *pi, int verbose)
- {
- #ifdef CONFIG_PARPORT
- struct parport *port;
- port = parport_find_base (pi->port);
- if (!port)
- return 0;
- pi->pardev = parport_register_device(port,
- pi->device,NULL,
- pi_wake_up,NULL,
- 0,(void *)pi);
- parport_put_port (port);
- if (!pi->pardev)
- return 0;
- init_waitqueue_head(&pi->parq);
- if (verbose) printk("%s: 0x%x is %sn",pi->device,pi->port,
- port->name);
-
- pi->parname = (char *)port->name;
- #endif
- return 1;
- }
- static int pi_probe_mode( PIA *pi, int max, char * scratch, int verbose)
- { int best, range;
- if (pi->mode != -1) {
- if (pi->mode >= max) return 0;
- range = 3;
- if (pi->mode >= pi->proto->epp_first) range = 8;
- if ((range == 8) && (pi->port % 8)) return 0;
- pi->reserved = range;
- return (!pi_test_proto(pi,scratch,verbose));
- }
- best = -1;
- for(pi->mode=0;pi->mode<max;pi->mode++) {
- range = 3;
- if (pi->mode >= pi->proto->epp_first) range = 8;
- if ((range == 8) && (pi->port % 8)) break;
- pi->reserved = range;
- if (!pi_test_proto(pi,scratch,verbose)) best = pi->mode;
- }
- pi->mode = best;
- return (best > -1);
- }
- static int pi_probe_unit( PIA *pi, int unit, char * scratch, int verbose)
- { int max,s,e;
- s = unit; e = s+1;
- if (s == -1) {
- s = 0;
- e = pi->proto->max_units;
- }
- if (!pi_register_parport(pi,verbose))
- return 0;
- if (pi->proto->test_port) {
- pi_claim(pi);
- max = pi->proto->test_port(pi);
- pi_unclaim(pi);
- }
- else max = pi->proto->max_mode;
- if (pi->proto->probe_unit) {
- pi_claim(pi);
- for (pi->unit=s;pi->unit<e;pi->unit++)
- if (pi->proto->probe_unit(pi)) {
- pi_unclaim(pi);
- if (pi_probe_mode(pi,max,scratch,verbose)) return 1;
- pi_unregister_parport(pi);
- return 0;
- }
- pi_unclaim(pi);
- pi_unregister_parport(pi);
- return 0;
- }
- if (!pi_probe_mode(pi,max,scratch,verbose)) {
- pi_unregister_parport(pi);
- return 0;
- }
- return 1;
-
- }
- int pi_init(PIA *pi, int autoprobe, int port, int mode,
- int unit, int protocol, int delay, char * scratch,
- int devtype, int verbose, char *device )
- { int p,k,s,e;
- int lpts[7] = {0x3bc,0x378,0x278,0x268,0x27c,0x26c,0};
- s = protocol; e = s+1;
- if (!protocols[0])
- request_module ("paride_protocol");
- if (autoprobe) {
- s = 0;
- e = MAX_PROTOS;
- } else if ((s < 0) || (s >= MAX_PROTOS) || (port <= 0) ||
- (!protocols[s]) || (unit < 0) ||
- (unit >= protocols[s]->max_units)) {
- printk("%s: Invalid parametersn",device);
- return 0;
- }
- for (p=s;p<e;p++) {
- if (protocols[p]) {
- pi->proto = protocols[p];
- pi->private = 0;
- pi->proto->init_proto(pi);
- if (delay == -1) pi->delay = pi->proto->default_delay;
- else pi->delay = delay;
- pi->devtype = devtype;
- pi->device = device;
- pi->parname = NULL;
- pi->pardev = NULL;
- init_waitqueue_head(&pi->parq);
- pi->claimed = 0;
- pi->claim_cont = NULL;
-
- pi->mode = mode;
- if (port != -1) {
- pi->port = port;
- if (pi_probe_unit(pi,unit,scratch,verbose)) break;
- pi->port = 0;
- } else {
- k = 0;
- while ((pi->port = lpts[k++]))
- if (pi_probe_unit(pi,unit,scratch,verbose)) break;
- if (pi->port) break;
- }
- pi->proto->release_proto(pi);
- }
- }
- if (!pi->port) {
- if (autoprobe) printk("%s: Autoprobe failedn",device);
- else printk("%s: Adapter not foundn",device);
- return 0;
- }
- #ifndef CONFIG_PARPORT
- if (!request_region(pi->port,pi->reserved,pi->device))
- {
- printk(KERN_WARNING"paride: Unable to request region 0x%xn", pi->port);
- return 0;
- }
- #endif /* !CONFIG_PARPORT */
- if (pi->parname)
- printk("%s: Sharing %s at 0x%xn",pi->device,
- pi->parname,pi->port);
- pi->proto->log_adapter(pi,scratch,verbose);
- return 1;
- }
- #ifdef MODULE
- int init_module(void)
- {
- int k;
- const char *indicate_pp = "";
- #ifdef CONFIG_PARPORT
- indicate_pp = " (parport)";
- #endif
- for (k=0;k<MAX_PROTOS;k++) protocols[k] = 0;
- printk("paride: version %s installed%sn",PI_VERSION,indicate_pp);
- return 0;
- }
- void cleanup_module(void)
- {
- }
- #else
- void paride_init( void )
- {
- #ifdef CONFIG_PARIDE_ATEN
- { extern struct pi_protocol aten;
- pi_register(&aten);
- };
- #endif
- #ifdef CONFIG_PARIDE_BPCK
- { extern struct pi_protocol bpck;
- pi_register(&bpck);
- };
- #endif
- #ifdef CONFIG_PARIDE_COMM
- { extern struct pi_protocol comm;
- pi_register(&comm);
- };
- #endif
- #ifdef CONFIG_PARIDE_DSTR
- { extern struct pi_protocol dstr;
- pi_register(&dstr);
- };
- #endif
- #ifdef CONFIG_PARIDE_EPAT
- { extern struct pi_protocol epat;
- pi_register(&epat);
- };
- #endif
- #ifdef CONFIG_PARIDE_EPIA
- { extern struct pi_protocol epia;
- pi_register(&epia);
- };
- #endif
- #ifdef CONFIG_PARIDE_FRPW
- { extern struct pi_protocol frpw;
- pi_register(&frpw);
- };
- #endif
- #ifdef CONFIG_PARIDE_FRIQ
- { extern struct pi_protocol friq;
- pi_register(&friq);
- };
- #endif
- #ifdef CONFIG_PARIDE_FIT2
- { extern struct pi_protocol fit2;
- pi_register(&fit2);
- };
- #endif
- #ifdef CONFIG_PARIDE_FIT3
- { extern struct pi_protocol fit3;
- pi_register(&fit3);
- };
- #endif
- #ifdef CONFIG_PARIDE_KBIC
- { extern struct pi_protocol k951;
- extern struct pi_protocol k971;
- pi_register(&k951);
- pi_register(&k971);
- };
- #endif
- #ifdef CONFIG_PARIDE_KTTI
- { extern struct pi_protocol ktti;
- pi_register(&ktti);
- };
- #endif
- #ifdef CONFIG_PARIDE_ON20
- { extern struct pi_protocol on20;
- pi_register(&on20);
- };
- #endif
- #ifdef CONFIG_PARIDE_ON26
- { extern struct pi_protocol on26;
- pi_register(&on26);
- };
- #endif
- #ifdef CONFIG_PARIDE_PD
- { extern int pd_init(void);
- pd_init();
- };
- #endif
- #ifdef CONFIG_PARIDE_PCD
- { extern int pcd_init(void);
- pcd_init();
- };
- #endif
- #ifdef CONFIG_PARIDE_PF
- { extern int pf_init(void);
- pf_init();
- };
- #endif
- #ifdef CONFIG_PARIDE_PT
- { extern int pt_init(void);
- pt_init();
- };
- #endif
- #ifdef CONFIG_PARIDE_PG
- { extern int pg_init(void);
- pg_init();
- };
- #endif
- }
- #endif
- /* end of paride.c */
- MODULE_LICENSE("GPL");