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freebsd/sys/i386/isa/atapi.c
Mike Smith a470e6686d Don't use INTR when only one device supports it. 
Submitted by:	Satoh Junichi <junichi@astec.co.jp>
1998-04-13 17:45:56 +00:00

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/*
* Device-independent level for ATAPI drivers.
*
* Copyright (C) 1995 Cronyx Ltd.
* Author Serge Vakulenko, <vak@cronyx.ru>
*
* This software is distributed with NO WARRANTIES, not even the implied
* warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Authors grant any other persons or organisations permission to use
* or modify this software as long as this message is kept with the software,
* all derivative works or modified versions.
*
* Version 1.9, Mon Oct 9 22:34:47 MSK 1995
*/
/*
* The ATAPI level is implemented as a machine-dependent layer
* between the device driver and the IDE controller.
* All the machine- and controller dependency is isolated inside
* the ATAPI level, while all the device dependency is located
* in the device subdriver.
*
* It seems that an ATAPI bus will became popular for medium-speed
* storage devices such as CD-ROMs, magneto-optical disks, tape streamers etc.
*
* To ease the development of new ATAPI drivers, the subdriver
* interface was designed to be as simple as possible.
*
* Three routines are available for the subdriver to access the device:
*
* struct atapires atapi_request_wait (ata, unit, cmd, a1, a2, a3, a4, a5,
* a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, addr, count);
* struct atapi *ata; -- atapi controller descriptor
* int unit; -- device unit number on the IDE bus
* u_char cmd; -- ATAPI command code
* u_char a1..a15; -- ATAPI command arguments
* char *addr; -- address of the data buffer for i/o
* int count; -- data length, >0 for read ops, <0 for write ops
*
* The atapi_request_wait() function puts the op in the queue of ATAPI
* commands for the IDE controller, starts the controller, the waits for
* operation to be completed (using tsleep).
* The function should be called from the user phase only (open(), close(),
* ioctl() etc).
* Ata and unit args are the values which the subdriver gets from the ATAPI
* level via attach() call.
* Buffer pointed to by *addr should be placed in core memory, static
* or dynamic, but not in stack.
* The function returns the error code structure, which consists of:
* - atapi driver code value
* - controller status port value
* - controller error port value
*
* struct atapires atapi_request_immediate (ata, unit, cmd, a1, a2, a3,
* a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15,
* addr, count);
*
* The atapi_request_immediate() function is similar to atapi_request_wait(),
* but it does not use interrupts for performing the request.
* It should be used during an attach phase to get parameters from the device.
*
* void atapi_request_callback (ata, unit, cmd, a1, a2, a3, a4, a5,
* a6, a7, a8, a9, a10, a11, a12, a13, a14, a15,
* addr, count, done, x, y);
* struct atapi *ata; -- atapi controller descriptor
* int unit; -- device unit number on the IDE bus
* u_char cmd; -- ATAPI command code
* u_char a1..a15; -- ATAPI command arguments
* char *addr; -- address of the data buffer for i/o
* int count; -- data length, >0 for read ops, <0 for write ops
* void (*done)(); -- function to call when op finished
* void *x, *y; -- arguments for done() function
*
* The atapi_request_callback() function puts the op in the queue of ATAPI
* commands for the IDE controller, starts the controller, then returns.
* When the operation finishes, then the callback function done()
* will be called on the interrupt level.
* The function is designed to be callable from the interrupt phase.
* The done() functions is called with the following arguments:
* (void) (*done) (x, y, count, errcode)
* void *x, *y; -- arguments from the atapi_request_callback()
* int count; -- the data residual count
* struct atapires errcode; -- error code structure, see above
*
* The new driver could be added in three steps:
* 1. Add entries for the new driver to bdevsw and cdevsw tables in conf.c.
* You will need to make at least three routines: open(), close(),
* strategy() and possibly ioctl().
* 2. Make attach() routine, which should allocate all the needed data
* structures and print the device description string (see wcdattach()).
* 3. Add an appropriate case to the switch in atapi_attach() routine,
* call attach() routine of the new driver here. Add the appropriate
* #include line at the top of attach.c.
* That's all!
*
* Use #define DEBUG in atapi.c to enable tracing of all i/o operations
* on the IDE bus.
*/
#undef DEBUG
#include "wdc.h"
#include "opt_atapi.h"
#ifndef ATAPI_MODULE
# include "wcd.h"
# include "wfd.h"
# include "wst.h"
/* # include "wmd.h" -- add your driver here */
#endif
#if NWDC > 0 && defined (ATAPI)
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <machine/clock.h>
#ifdef ATAPI_MODULE
# define ATAPI_STATIC
#endif
#include <i386/isa/atapi.h>
#ifndef ATAPI_STATIC
/* this code is compiled as part of the kernel if options ATAPI */
/*
* In the case of loadable ATAPI driver we need to store
* the probe info for delayed attaching.
*/
struct atapidrv atapi_drvtab[4];
int atapi_ndrv;
struct atapi *atapi_tab;
int atapi_attach (int ctlr, int unit, int port)
{
atapi_drvtab[atapi_ndrv].ctlr = ctlr;
atapi_drvtab[atapi_ndrv].unit = unit;
atapi_drvtab[atapi_ndrv].port = port;
atapi_drvtab[atapi_ndrv].attached = 0;
++atapi_ndrv;
return (1);
}
#else /* ATAPI_STATIC */
/* this code is compiled part of the module */
#ifdef DEBUG
# define print(s) printf s
#else
# define print(s) {/*void*/}
#endif
/*
* ATAPI packet command phase.
*/
#define PHASE_CMDOUT (ARS_DRQ | ARI_CMD)
#define PHASE_DATAIN (ARS_DRQ | ARI_IN)
#define PHASE_DATAOUT ARS_DRQ
#define PHASE_COMPLETED (ARI_IN | ARI_CMD)
#define PHASE_ABORTED 0 /* nonstandard - for NEC 260 */
static struct atapi atapitab[NWDC];
static struct atapi_params *atapi_probe (int port, int unit);
static int atapi_wait (int port, u_char bits_wanted);
static void atapi_send_cmd (struct atapi *ata, struct atapicmd *ac);
static int atapi_io (struct atapi *ata, struct atapicmd *ac);
static int atapi_start_cmd (struct atapi *ata, struct atapicmd *ac);
static int atapi_wait_cmd (struct atapi *ata, struct atapicmd *ac);
static void atapi_poll_dsc(struct atapi *ata);
extern int wdstart (int ctrlr);
extern int wcdattach(struct atapi*, int, struct atapi_params*, int);
extern int wfdattach(struct atapi*, int, struct atapi_params*, int);
extern int wstattach(struct atapi*, int, struct atapi_params*, int);
/*
* Probe the ATAPI device at IDE controller `ctlr', drive `unit'.
* Called at splbio().
*/
#ifdef ATAPI_MODULE
static
#endif
int atapi_attach (int ctlr, int unit, int port)
{
struct atapi *ata = atapitab + ctlr;
struct atapi_params *ap;
char buf [sizeof(ap->model) + 1];
char revbuf [sizeof(ap->revision) + 1];
struct atapicmd *ac;
print (("atapi%d.%d at 0x%x: attach called\n", ctlr, unit, port));
ap = atapi_probe (port, unit);
if (! ap)
return (0);
bcopy (ap->model, buf, sizeof(buf)-1);
buf[sizeof(buf)-1] = 0;
bcopy (ap->revision, revbuf, sizeof(revbuf)-1);
revbuf[sizeof(revbuf)-1] = 0;
printf ("wdc%d: unit %d (atapi): <%s/%s>", ctlr, unit, buf, revbuf);
/* device is removable */
if (ap->removable)
printf (", removable");
/* packet command size */
switch (ap->cmdsz) {
case AT_PSIZE_12: break;
case AT_PSIZE_16: printf (", cmd16"); ata->cmd16 = 1; break;
default: printf (", cmd%d", ap->cmdsz);
}
/* DRQ type */
switch (ap->drqtype) {
case AT_DRQT_MPROC: ata->slow = 1; break;
case AT_DRQT_INTR: printf (", intr"); ata->intrcmd = 1; break;
case AT_DRQT_ACCEL: printf (", accel"); ata->accel = 1; break;
default: printf (", drq%d", ap->drqtype);
}
if (ata->slow)
ata->intrcmd = 0;
/*
* If we have two devices, one supporting INTR and one ACCEL, we
* have to pessimise - clear INTR and set slow.
*/
if (ata->accel && ata->intrcmd) {
ata->intrcmd = 0;
ata->slow = 1;
}
/* overlap operation supported */
if (ap->ovlapflag)
printf (", ovlap");
/* interleaved DMA supported */
if (ap->idmaflag)
printf (", idma");
/* DMA supported */
else if (ap->dmaflag)
printf (", dma");
/* IORDY can be disabled */
if (ap->iordydis)
printf (", iordis");
/* IORDY supported */
else if (ap->iordyflag)
printf (", iordy");
printf ("\n");
ata->port = port;
ata->ctrlr = ctlr;
ata->attached[unit] = 0;
#ifdef DEBUG
ata->debug = 1;
#else
ata->debug = 0;
#endif
/* Initialize free queue. */
ata->cmdrq[15].next = 0;
for (ac = ata->cmdrq+14; ac >= ata->cmdrq; --ac)
ac->next = ac+1;
ata->free = ata->cmdrq;
if (ap->proto != AT_PROTO_ATAPI) {
printf ("wdc%d: unit %d: unknown ATAPI protocol=%d\n",
ctlr, unit, ap->proto);
free (ap, M_TEMP);
return (0);
}
#ifdef ATAPI_MODULE
ata->params[unit] = ap;
return (1);
#else
switch (ap->devtype) {
default:
/* unknown ATAPI device */
printf ("wdc%d: unit %d: unknown ATAPI type=%d\n",
ctlr, unit, ap->devtype);
break;
case AT_TYPE_DIRECT: /* direct-access */
#if NWFD > 0
/* ATAPI Floppy(LS-120) */
if (wfdattach (ata, unit, ap, ata->debug) >= 0) {
/* Device attached successfully. */
ata->attached[unit] = 1;
return (1);
}
#endif
case AT_TYPE_CDROM: /* CD-ROM device */
#if NWCD > 0
/* ATAPI CD-ROM */
if (wcdattach (ata, unit, ap, ata->debug) < 0)
break;
/* Device attached successfully. */
ata->attached[unit] = 1;
return (1);
#else
printf ("wdc%d: ATAPI CD-ROMs not configured\n", ctlr);
break;
#endif
case AT_TYPE_TAPE: /* streaming tape */
#if NWST > 0
/* ATAPI Streaming Tape */
if (wstattach (ata, unit, ap, ata->debug) < 0)
break;
/* Device attached successfully. */
ata->attached[unit] = 1;
return (1);
#else
printf ("wdc%d: ATAPI streaming tapes not configured\n", ctlr);
#endif
break;
case AT_TYPE_OPTICAL: /* optical disk */
#if NWMD > 0
/* Add your driver here */
#else
printf ("wdc%d: ATAPI optical disks not supported yet\n", ctlr);
#endif
break;
}
/* Attach failed. */
free (ap, M_TEMP);
return (0);
#endif /* ATAPI_MODULE */
}
static char *cmdname (u_char cmd)
{
static char buf[8];
switch (cmd) {
case 0x00: return ("TEST_UNIT_READY");
case 0x03: return ("REQUEST_SENSE");
case 0x1b: return ("START_STOP");
case 0x1e: return ("PREVENT_ALLOW");
case 0x25: return ("READ_CAPACITY");
case 0x28: return ("READ_BIG");
case 0x2a: return ("WRITE_BIG");
case 0x43: return ("READ_TOC");
case 0x42: return ("READ_SUBCHANNEL");
case 0x55: return ("MODE_SELECT_BIG");
case 0x5a: return ("MODE_SENSE");
case 0xb4: return ("PLAY_CD");
case 0x47: return ("PLAY_MSF");
case 0x4b: return ("PAUSE");
case 0x48: return ("PLAY_TRACK");
case 0xa5: return ("PLAY_BIG");
}
sprintf (buf, "[0x%x]", cmd);
return (buf);
}
static void bswap (char *buf, int len)
{
u_short *p = (u_short*) (buf + len);
while (--p >= (u_short*) buf)
*p = ntohs (*p);
}
static void btrim (char *buf, int len)
{
char *p;
/* Remove the trailing spaces. */
for (p=buf; p<buf+len; ++p)
if (! *p)
*p = ' ';
for (p=buf+len-1; p>=buf && *p==' '; --p)
*p = 0;
}
/*
* Issue IDENTIFY command to ATAPI drive to ask it what it is.
*/
static struct atapi_params *atapi_probe (int port, int unit)
{
struct atapi_params *ap;
char tb [DEV_BSIZE];
#ifdef PC98
int cnt;
outb(0x432,unit%2);
print(("unit = %d,select %d\n",unit,unit%2));
#endif
/* Wait for controller not busy. */
#ifdef PC98
outb (port + AR_DRIVE, unit / 2 ? ARD_DRIVE1 : ARD_DRIVE0);
#else
outb (port + AR_DRIVE, unit ? ARD_DRIVE1 : ARD_DRIVE0);
#endif
if (atapi_wait (port, 0) < 0) {
print (("atapiX.%d at 0x%x: controller busy, status=%b\n",
unit, port, inb (port + AR_STATUS), ARS_BITS));
return (0);
}
/* Issue ATAPI IDENTIFY command. */
#ifdef PC98
outb (port + AR_DRIVE, unit/2 ? ARD_DRIVE1 : ARD_DRIVE0);
/* Wait for DRQ deassert. */
for (cnt=2000; cnt>0; --cnt)
if (! (inb (port + AR_STATUS) & ARS_DRQ))
break;
outb (port + AR_COMMAND, ATAPIC_IDENTIFY);
DELAY(500);
#else
outb (port + AR_DRIVE, unit ? ARD_DRIVE1 : ARD_DRIVE0);
outb (port + AR_COMMAND, ATAPIC_IDENTIFY);
#endif
/* Check that device is present. */
if (inb (port + AR_STATUS) == 0xff) {
print (("atapiX.%d at 0x%x: no device\n", unit, port));
if (unit == 1)
/* Select unit 0. */
outb (port + AR_DRIVE, ARD_DRIVE0);
return (0);
}
/* Wait for data ready. */
if (atapi_wait (port, ARS_DRQ) != 0) {
print (("atapiX.%d at 0x%x: identify not ready, status=%b\n",
unit, port, inb (port + AR_STATUS), ARS_BITS));
if (unit == 1)
/* Select unit 0. */
outb (port + AR_DRIVE, ARD_DRIVE0);
return (0);
}
/* check that DRQ isn't a fake */
if (inb (port + AR_STATUS) == 0xff) {
print (("atapiX.%d at 0x%x: no device\n", unit, port));
if (unit == 1)
/* Select unit 0. */
outb (port + AR_DRIVE, ARD_DRIVE0);
return (0);
}
/* Obtain parameters. */
insw (port + AR_DATA, tb, sizeof(tb) / sizeof(short));
ap = malloc (sizeof *ap, M_TEMP, M_NOWAIT);
if (! ap)
return (0);
bcopy (tb, ap, sizeof *ap);
/*
* Shuffle string byte order.
* Mitsumi and NEC drives don't need this.
*/
if (! ((ap->model[0] == 'N' && ap->model[1] == 'E') ||
(ap->model[0] == 'F' && ap->model[1] == 'X')))
bswap (ap->model, sizeof(ap->model));
bswap (ap->serial, sizeof(ap->serial));
bswap (ap->revision, sizeof(ap->revision));
/* Clean up the model name, serial and revision numbers. */
btrim (ap->model, sizeof(ap->model));
btrim (ap->serial, sizeof(ap->serial));
btrim (ap->revision, sizeof(ap->revision));
return (ap);
}
/*
* Wait uninterruptibly until controller is not busy and certain
* status bits are set.
* The wait is usually short unless it is for the controller to process
* an entire critical command.
* Return 1 for (possibly stale) controller errors, -1 for timeout errors,
* or 0 for no errors.
*/
static int atapi_wait (int port, u_char bits_wanted)
{
int cnt;
u_char s;
/* Wait 5 sec for BUSY deassert. */
for (cnt=500000; cnt>0; --cnt) {
s = inb (port + AR_STATUS);
if (! (s & ARS_BSY))
break;
DELAY (10);
}
if (cnt <= 0)
return (-1);
if (! bits_wanted)
return (s & ARS_CHECK);
/* Wait 50 msec for bits wanted. */
for (cnt=5000; cnt>0; --cnt) {
s = inb (port + AR_STATUS);
if ((s & bits_wanted) == bits_wanted)
return (s & ARS_CHECK);
DELAY (10);
}
return (-1);
}
void atapi_debug (struct atapi *ata, int on)
{
ata->debug = on;
}
static struct atapicmd *atapi_alloc (struct atapi *ata)
{
struct atapicmd *ac;
while (! ata->free)
tsleep ((caddr_t)ata, PRIBIO, "atacmd", 100);
ac = ata->free;
ata->free = ac->next;
ac->busy = 1;
return (ac);
}
static void atapi_free (struct atapi *ata, struct atapicmd *ac)
{
if (! ata->free)
wakeup ((caddr_t)&ata);
ac->busy = 0;
ac->next = ata->free;
ata->free = ac;
}
/*
* Add new command request to the end of the queue.
*/
static void atapi_enqueue (struct atapi *ata, struct atapicmd *ac)
{
ac->next = 0;
if (ata->tail)
ata->tail->next = ac;
else
ata->queue = ac;
ata->tail = ac;
}
static void atapi_done (struct atapi *ata)
{
struct atapicmd *ac = ata->queue;
if (! ac)
return; /* cannot happen */
ata->queue = ac->next;
if (! ata->queue)
ata->tail = 0;
if (ac->callback) {
(*ac->callback) (ac->cbarg1, ac->cbarg2, ac->count, ac->result);
atapi_free (ata, ac);
} else
wakeup ((caddr_t)ac);
}
/*
* Start new packet op. Called from wdstart().
* Return 1 if op started, and we are waiting for interrupt.
* Return 0 when idle.
*/
int atapi_start (int ctrlr)
{
struct atapi *ata = atapitab + ctrlr;
struct atapicmd *ac;
again:
ac = ata->queue;
if (! ac)
return (0);
/* Start packet command. */
if (atapi_start_cmd (ata, ac) < 0) {
atapi_done (ata);
goto again;
}
if (ata->intrcmd)
/* Wait for interrupt before sending packet command */
return (1);
/* Wait for DRQ. */
if (atapi_wait_cmd (ata, ac) < 0) {
atapi_done (ata);
goto again;
}
/* Send packet command. */
atapi_send_cmd (ata, ac);
return (1);
}
/*
* Start new packet op. Returns -1 on errors.
*/
int atapi_start_cmd (struct atapi *ata, struct atapicmd *ac)
{
ac->result.error = 0;
ac->result.status = 0;
#ifdef PC98
outb(0x432,(ac->unit)%2);
print(("(ac->unit) = %d,select %d (2) \n",(ac->unit),(ac->unit)%2));
outb (ata->port + AR_DRIVE, (ac->unit)/2 ? ARD_DRIVE1 : ARD_DRIVE0);
#else
outb (ata->port + AR_DRIVE, ac->unit ? ARD_DRIVE1 : ARD_DRIVE0);
#endif
if (atapi_wait (ata->port, 0) < 0) {
printf ("atapi%d.%d: controller not ready for cmd\n",
ata->ctrlr, ac->unit);
ac->result.code = RES_NOTRDY;
return (-1);
}
/* Set up the controller registers. */
outb (ata->port + AR_FEATURES, 0);
outb (ata->port + AR_IREASON, 0);
outb (ata->port + AR_TAG, 0);
outb (ata->port + AR_CNTLO, ac->count & 0xff);
outb (ata->port + AR_CNTHI, ac->count >> 8);
outb (ata->port + AR_COMMAND, ATAPIC_PACKET);
if (ata->debug)
printf ("atapi%d.%d: start\n", ata->ctrlr, ac->unit);
return (0);
}
/*
* Wait for DRQ before sending packet cmd. Returns -1 on errors.
*/
int atapi_wait_cmd (struct atapi *ata, struct atapicmd *ac)
{
/* Wait for DRQ from 50 usec to 3 msec for slow devices */
int cnt = ata->intrcmd ? 10000 : ata->slow ? 3000 : 50;
int ireason = 0, phase = 0;
/* Wait for command phase. */
for (; cnt>0; cnt-=10) {
ireason = inb (ata->port + AR_IREASON);
ac->result.status = inb (ata->port + AR_STATUS);
phase = (ireason & (ARI_CMD | ARI_IN)) |
(ac->result.status & (ARS_DRQ | ARS_BSY));
if (phase == PHASE_CMDOUT)
break;
DELAY (10);
}
if (phase != PHASE_CMDOUT) {
ac->result.code = RES_NODRQ;
ac->result.error = inb (ata->port + AR_ERROR);
printf ("atapi%d.%d: invalid command phase, ireason=0x%x, status=%b, error=%b\n",
ata->ctrlr, ac->unit, ireason,
ac->result.status, ARS_BITS,
ac->result.error, AER_BITS);
return (-1);
}
return (0);
}
/*
* Send packet cmd.
*/
void atapi_send_cmd (struct atapi *ata, struct atapicmd *ac)
{
outsw (ata->port + AR_DATA, ac->cmd, ata->cmd16 ? 8 : 6);
if (ata->debug)
printf ("atapi%d.%d: send cmd %s %x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x\n",
ata->ctrlr, ac->unit, cmdname (ac->cmd[0]), ac->cmd[0],
ac->cmd[1], ac->cmd[2], ac->cmd[3], ac->cmd[4],
ac->cmd[5], ac->cmd[6], ac->cmd[7], ac->cmd[8],
ac->cmd[9], ac->cmd[10], ac->cmd[11], ac->cmd[12],
ac->cmd[13], ac->cmd[14], ac->cmd[15]);
}
/*
* Interrupt routine for the controller. Called from wdintr().
* Finish the started op, wakeup wait-type commands,
* run callbacks for callback-type commands, then return.
* Do not start new op here, it will be done by wdstart,
* which is called just after us.
* Return 1 if op continues, and we are waiting for new interrupt.
* Return 0 when idle.
*/
int atapi_intr (int ctrlr)
{
struct atapi *ata = atapitab + ctrlr;
struct atapicmd *ac = ata->queue;
#ifdef PC98
outb(0x432,(ac->unit)%2);
print(("atapi_intr:(ac->unit)= %d,select %d\n",ac->unit,(ac->unit)%2));
#endif
if (! ac) {
printf ("atapi%d: stray interrupt\n", ata->ctrlr);
return (0);
}
if (atapi_io (ata, ac) > 0)
return (1);
atapi_done (ata);
return (0);
}
/*
* Process the i/o phase, transferring the command/data to/from the device.
* Return 1 if op continues, and we are waiting for new interrupt.
* Return 0 when idle.
*/
int atapi_io (struct atapi *ata, struct atapicmd *ac)
{
u_char ireason;
u_short len, i;
if (atapi_wait (ata->port, 0) < 0) {
ac->result.status = inb (ata->port + AR_STATUS);
ac->result.error = inb (ata->port + AR_ERROR);
ac->result.code = RES_NOTRDY;
printf ("atapi%d.%d: controller not ready, status=%b, error=%b\n",
ata->ctrlr, ac->unit, ac->result.status, ARS_BITS,
ac->result.error, AER_BITS);
return (0);
}
ac->result.status = inb (ata->port + AR_STATUS);
ac->result.error = inb (ata->port + AR_ERROR);
len = inb (ata->port + AR_CNTLO);
len |= inb (ata->port + AR_CNTHI) << 8;
ireason = inb (ata->port + AR_IREASON);
if (ata->debug) {
printf ("atapi%d.%d: intr ireason=0x%x, len=%d, status=%b, error=%b\n",
ata->ctrlr, ac->unit, ireason, len,
ac->result.status, ARS_BITS,
ac->result.error, AER_BITS);
}
switch ((ireason & (ARI_CMD | ARI_IN)) | (ac->result.status & ARS_DRQ)) {
default:
printf ("atapi%d.%d: unknown phase\n", ata->ctrlr, ac->unit);
ac->result.code = RES_ERR;
break;
case PHASE_CMDOUT:
/* Send packet command. */
if (! (ac->result.status & ARS_DRQ)) {
printf ("atapi%d.%d: no cmd drq\n",
ata->ctrlr, ac->unit);
ac->result.code = RES_NODRQ;
break;
}
atapi_send_cmd (ata, ac);
return (1);
case PHASE_DATAOUT:
/* Write data */
if (ac->count > 0) {
printf ("atapi%d.%d: invalid data direction\n",
ata->ctrlr, ac->unit);
ac->result.code = RES_INVDIR;
break;
}
if (-ac->count < len) {
print (("atapi%d.%d: send data underrun, %d bytes left\n",
ata->ctrlr, ac->unit, -ac->count));
ac->result.code = RES_UNDERRUN;
outsw (ata->port + AR_DATA, ac->addr,
-ac->count / sizeof(short));
for (i= -ac->count; i<len; i+=sizeof(short))
outw (ata->port + AR_DATA, 0);
} else
outsw (ata->port + AR_DATA, ac->addr,
len / sizeof(short));
ac->addr += len;
ac->count += len;
return (1);
case PHASE_DATAIN:
/* Read data */
if (ac->count < 0) {
printf ("atapi%d.%d: invalid data direction\n",
ata->ctrlr, ac->unit);
ac->result.code = RES_INVDIR;
break;
}
if (ac->count < len) {
print (("atapi%d.%d: recv data overrun, %d bytes left\n",
ata->ctrlr, ac->unit, ac->count));
ac->result.code = RES_OVERRUN;
insw (ata->port + AR_DATA, ac->addr,
ac->count / sizeof(short));
for (i=ac->count; i<len; i+=sizeof(short))
inw (ata->port + AR_DATA);
} else
insw (ata->port + AR_DATA, ac->addr,
len / sizeof(short));
ac->addr += len;
ac->count -= len;
return (1);
case PHASE_ABORTED:
case PHASE_COMPLETED:
if (ac->result.status & (ARS_CHECK | ARS_DF))
ac->result.code = RES_ERR;
else if (ac->count < 0) {
print (("atapi%d.%d: send data overrun, %d bytes left\n",
ata->ctrlr, ac->unit, -ac->count));
ac->result.code = RES_OVERRUN;
} else if (ac->count > 0) {
print (("atapi%d.%d: recv data underrun, %d bytes left\n",
ata->ctrlr, ac->unit, ac->count));
ac->result.code = RES_UNDERRUN;
bzero (ac->addr, ac->count);
} else
ac->result.code = RES_OK;
break;
}
return (0);
}
/*
* Queue new packet request, then call wdstart().
* Called on splbio().
*/
void atapi_request_callback (struct atapi *ata, int unit,
u_char cmd, u_char a1, u_char a2, u_char a3, u_char a4,
u_char a5, u_char a6, u_char a7, u_char a8, u_char a9,
u_char a10, u_char a11, u_char a12, u_char a13, u_char a14, u_char a15,
char *addr, int count, atapi_callback_t *done, void *x, void *y)
{
struct atapicmd *ac;
ac = atapi_alloc (ata);
ac->cmd[0] = cmd; ac->cmd[1] = a1;
ac->cmd[2] = a2; ac->cmd[3] = a3;
ac->cmd[4] = a4; ac->cmd[5] = a5;
ac->cmd[6] = a6; ac->cmd[7] = a7;
ac->cmd[8] = a8; ac->cmd[9] = a9;
ac->cmd[10] = a10; ac->cmd[11] = a11;
ac->cmd[12] = a12; ac->cmd[13] = a13;
ac->cmd[14] = a14; ac->cmd[15] = a15;
ac->unit = unit;
ac->addr = addr;
ac->count = count;
ac->callback = done;
ac->cbarg1 = x;
ac->cbarg2 = y;
if (ata->debug)
printf ("atapi%d.%d: req cb %x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x len=%d\n",
ata->ctrlr, ac->unit, ac->cmd[0], ac->cmd[1],
ac->cmd[2], ac->cmd[3], ac->cmd[4], ac->cmd[5],
ac->cmd[6], ac->cmd[7], ac->cmd[8], ac->cmd[9],
ac->cmd[10], ac->cmd[11], ac->cmd[12],
ac->cmd[13], ac->cmd[14], ac->cmd[15], count);
atapi_enqueue (ata, ac);
wdstart (ata->ctrlr);
}
/*
* Queue new packet request, then call wdstart().
* Wait until the request is finished.
* Called on spl0().
* Return atapi error.
* Buffer pointed to by *addr should be placed in core memory, not in stack!
*/
struct atapires atapi_request_wait (struct atapi *ata, int unit,
u_char cmd, u_char a1, u_char a2, u_char a3, u_char a4,
u_char a5, u_char a6, u_char a7, u_char a8, u_char a9,
u_char a10, u_char a11, u_char a12, u_char a13, u_char a14, u_char a15,
char *addr, int count)
{
struct atapicmd *ac;
int x = splbio ();
struct atapires result;
ac = atapi_alloc (ata);
ac->cmd[0] = cmd; ac->cmd[1] = a1;
ac->cmd[2] = a2; ac->cmd[3] = a3;
ac->cmd[4] = a4; ac->cmd[5] = a5;
ac->cmd[6] = a6; ac->cmd[7] = a7;
ac->cmd[8] = a8; ac->cmd[9] = a9;
ac->cmd[10] = a10; ac->cmd[11] = a11;
ac->cmd[12] = a12; ac->cmd[13] = a13;
ac->cmd[14] = a14; ac->cmd[15] = a15;
ac->unit = unit;
ac->addr = addr;
ac->count = count;
ac->callback = 0;
ac->cbarg1 = 0;
ac->cbarg2 = 0;
if (ata->debug)
printf ("atapi%d.%d: req w %x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x len=%d\n",
ata->ctrlr, ac->unit, ac->cmd[0], ac->cmd[1],
ac->cmd[2], ac->cmd[3], ac->cmd[4], ac->cmd[5],
ac->cmd[6], ac->cmd[7], ac->cmd[8], ac->cmd[9],
ac->cmd[10], ac->cmd[11], ac->cmd[12],
ac->cmd[13], ac->cmd[14], ac->cmd[15], count);
atapi_enqueue (ata, ac);
wdstart (ata->ctrlr);
tsleep ((caddr_t)ac, PRIBIO, "atareq", 0);
result = ac->result;
atapi_free (ata, ac);
splx (x);
return (result);
}
/*
* Perform a packet command on the device.
* Should be called on splbio().
* Return atapi error.
*/
struct atapires atapi_request_immediate (struct atapi *ata, int unit,
u_char cmd, u_char a1, u_char a2, u_char a3, u_char a4,
u_char a5, u_char a6, u_char a7, u_char a8, u_char a9,
u_char a10, u_char a11, u_char a12, u_char a13, u_char a14, u_char a15,
char *addr, int count)
{
struct atapicmd cmdbuf, *ac = &cmdbuf;
int cnt;
ac->cmd[0] = cmd; ac->cmd[1] = a1;
ac->cmd[2] = a2; ac->cmd[3] = a3;
ac->cmd[4] = a4; ac->cmd[5] = a5;
ac->cmd[6] = a6; ac->cmd[7] = a7;
ac->cmd[8] = a8; ac->cmd[9] = a9;
ac->cmd[10] = a10; ac->cmd[11] = a11;
ac->cmd[12] = a12; ac->cmd[13] = a13;
ac->cmd[14] = a14; ac->cmd[15] = a15;
ac->unit = unit;
ac->addr = addr;
ac->count = count;
ac->callback = 0;
ac->cbarg1 = 0;
ac->cbarg2 = 0;
if (ata->debug)
printf ("atapi%d.%d: req im %x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x len=%d\n",
ata->ctrlr, ac->unit, ac->cmd[0], ac->cmd[1],
ac->cmd[2], ac->cmd[3], ac->cmd[4], ac->cmd[5],
ac->cmd[6], ac->cmd[7], ac->cmd[8], ac->cmd[9],
ac->cmd[10], ac->cmd[11], ac->cmd[12],
ac->cmd[13], ac->cmd[14], ac->cmd[15], count);
/* Start packet command, wait for DRQ. */
if (atapi_start_cmd (ata, ac) >= 0 && atapi_wait_cmd (ata, ac) >= 0) {
/* Send packet command. */
atapi_send_cmd (ata, ac);
/* Wait for data i/o phase. */
for (cnt=20000; cnt>0; --cnt)
if (((inb (ata->port + AR_IREASON) & (ARI_CMD | ARI_IN)) |
(inb (ata->port + AR_STATUS) & ARS_DRQ)) != PHASE_CMDOUT)
break;
/* Do all needed i/o. */
while (atapi_io (ata, ac))
/* Wait for DRQ deassert. */
for (cnt=2000; cnt>0; --cnt) {
if (! (inb (ata->port + AR_STATUS) & ARS_DRQ))
break;
DELAY(10);
}
}
return (ac->result);
}
#endif /* ATAPI_STATIC */
#if defined (ATAPI_MODULE) || !defined(ATAPI_STATIC)
int (*atapi_start_ptr) (int ctrlr);
int (*atapi_intr_ptr) (int ctrlr);
void (*atapi_debug_ptr) (struct atapi *ata, int on);
struct atapires (*atapi_request_wait_ptr) (struct atapi *ata, int unit,
u_char cmd, u_char a1, u_char a2, u_char a3, u_char a4,
u_char a5, u_char a6, u_char a7, u_char a8, u_char a9,
u_char a10, u_char a11, u_char a12, u_char a13, u_char a14, u_char a15,
char *addr, int count);
void (*atapi_request_callback_ptr) (struct atapi *ata, int unit,
u_char cmd, u_char a1, u_char a2, u_char a3, u_char a4,
u_char a5, u_char a6, u_char a7, u_char a8, u_char a9,
u_char a10, u_char a11, u_char a12, u_char a13, u_char a14, u_char a15,
char *addr, int count, atapi_callback_t *done, void *x, void *y);
struct atapires (*atapi_request_immediate_ptr) (struct atapi *ata, int unit,
u_char cmd, u_char a1, u_char a2, u_char a3, u_char a4,
u_char a5, u_char a6, u_char a7, u_char a8, u_char a9,
u_char a10, u_char a11, u_char a12, u_char a13, u_char a14, u_char a15,
char *addr, int count);
#endif
#ifdef ATAPI_MODULE
/*
* ATAPI loadable driver stubs.
*/
#include <sys/exec.h>
#include <sys/sysent.h>
#include <sys/lkm.h>
extern int atapi_lock (int ctlr);
/*
* XXX "ioconf.h" is not included by <sys/conf.h> for lkms, so we need this
* misplaced declaration.
*/
extern void wdintr (int);
/*
* Construct lkm_misc structure (see lkm.h).
*/
MOD_MISC(atapi);
int atapi_locked;
int atapi_lock (int ctlr)
{
atapi_locked = 1;
wakeup (&atapi_locked);
return (1);
}
/*
* Function called when loading the driver.
*/
static int atapi_load (struct lkm_table *lkmtp, int cmd)
{
struct atapidrv *d;
int n, x;
/*
* Probe all free IDE units, searching for ATAPI drives.
*/
n = 0;
for (d=atapi_drvtab; d<atapi_drvtab+atapi_ndrv && d->port; ++d) {
/* Lock the controller. */
x = splbio ();
atapi_locked = 0;
atapi_start_ptr = atapi_lock;
wdstart (d->ctlr);
while (! atapi_locked)
tsleep (&atapi_locked, PRIBIO, "atach", 0);
/* Probe the drive. */
if (atapi_attach (d->ctlr, d->unit, d->port)) {
d->attached = 1;
++n;
}
/* Unlock the controller. */
atapi_start_ptr = 0;
wdintr (d->ctlr);
splx (x);
}
if (! n)
return ENXIO;
atapi_start_ptr = atapi_start;
atapi_intr_ptr = atapi_intr;
atapi_debug_ptr = atapi_debug;
atapi_request_wait_ptr = atapi_request_wait;
atapi_request_callback_ptr = atapi_request_callback;
atapi_request_immediate_ptr = atapi_request_immediate;
atapi_tab = atapitab;
return 0;
}
/*
* Function called when unloading the driver.
*/
static int atapi_unload (struct lkm_table *lkmtp, int cmd)
{
struct atapi *ata;
int u;
for (ata=atapi_tab; ata<atapi_tab+2; ++ata)
if (ata->port)
for (u=0; u<2; ++u)
if (ata->attached[u])
return EBUSY;
for (ata=atapi_tab; ata<atapi_tab+2; ++ata)
if (ata->port)
for (u=0; u<2; ++u)
if (ata->params[u]) {
free (ata->params[u], M_TEMP);
ata->params[u] = 0;
}
atapi_start_ptr = 0;
atapi_intr_ptr = 0;
atapi_debug_ptr = 0;
atapi_request_wait_ptr = 0;
atapi_request_callback_ptr = 0;
atapi_request_immediate_ptr = 0;
atapi_tab = 0;
return 0;
}
/*
* Dispatcher function for the module (load/unload/stat).
*/
int atapi_mod (struct lkm_table *lkmtp, int cmd, int ver)
{
MOD_DISPATCH (atapi, lkmtp, cmd, ver,
atapi_load, atapi_unload, lkm_nullcmd);
}
#endif /* ATAPI_MODULE */
#endif /* NWDC && ATAPI */
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