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atp870u.c
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atp870u.c
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/*
* Copyright (C) 1997 Wu Ching Chen
* 2.1.x update (C) 1998 Krzysztof G. Baranowski
* 2.5.x update (C) 2002 Red Hat
* 2.6.x update (C) 2004 Red Hat
*
* Marcelo Tosatti <[email protected]> : SMP fixes
*
* Wu Ching Chen : NULL pointer fixes 2000/06/02
* support atp876 chip
* enable 32 bit fifo transfer
* support cdrom & remove device run ultra speed
* fix disconnect bug 2000/12/21
* support atp880 chip lvd u160 2001/05/15
* fix prd table bug 2001/09/12 (7.1)
*
* atp885 support add by ACARD Hao Ping Lian 2005/01/05
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <linux/pci.h>
#include <linux/blkdev.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include "atp870u.h"
static struct scsi_host_template atp870u_template;
static void send_s870(struct atp_unit *dev,unsigned char c);
static void atp_is(struct atp_unit *dev, unsigned char c, bool wide_chip, unsigned char lvdmode);
static inline void atp_writeb_base(struct atp_unit *atp, u8 reg, u8 val)
{
outb(val, atp->baseport + reg);
}
static inline void atp_writew_base(struct atp_unit *atp, u8 reg, u16 val)
{
outw(val, atp->baseport + reg);
}
static inline void atp_writeb_io(struct atp_unit *atp, u8 channel, u8 reg, u8 val)
{
outb(val, atp->ioport[channel] + reg);
}
static inline void atp_writew_io(struct atp_unit *atp, u8 channel, u8 reg, u16 val)
{
outw(val, atp->ioport[channel] + reg);
}
static inline void atp_writeb_pci(struct atp_unit *atp, u8 channel, u8 reg, u8 val)
{
outb(val, atp->pciport[channel] + reg);
}
static inline void atp_writel_pci(struct atp_unit *atp, u8 channel, u8 reg, u32 val)
{
outl(val, atp->pciport[channel] + reg);
}
static inline u8 atp_readb_base(struct atp_unit *atp, u8 reg)
{
return inb(atp->baseport + reg);
}
static inline u16 atp_readw_base(struct atp_unit *atp, u8 reg)
{
return inw(atp->baseport + reg);
}
static inline u32 atp_readl_base(struct atp_unit *atp, u8 reg)
{
return inl(atp->baseport + reg);
}
static inline u8 atp_readb_io(struct atp_unit *atp, u8 channel, u8 reg)
{
return inb(atp->ioport[channel] + reg);
}
static inline u16 atp_readw_io(struct atp_unit *atp, u8 channel, u8 reg)
{
return inw(atp->ioport[channel] + reg);
}
static inline u8 atp_readb_pci(struct atp_unit *atp, u8 channel, u8 reg)
{
return inb(atp->pciport[channel] + reg);
}
static inline bool is880(struct atp_unit *atp)
{
return atp->pdev->device == ATP880_DEVID1 ||
atp->pdev->device == ATP880_DEVID2;
}
static inline bool is885(struct atp_unit *atp)
{
return atp->pdev->device == ATP885_DEVID;
}
static irqreturn_t atp870u_intr_handle(int irq, void *dev_id)
{
unsigned long flags;
unsigned short int id;
unsigned char i, j, c, target_id, lun,cmdp;
unsigned char *prd;
struct scsi_cmnd *workreq;
unsigned long adrcnt, k;
#ifdef ED_DBGP
unsigned long l;
#endif
struct Scsi_Host *host = dev_id;
struct atp_unit *dev = (struct atp_unit *)&host->hostdata;
for (c = 0; c < 2; c++) {
j = atp_readb_io(dev, c, 0x1f);
if ((j & 0x80) != 0)
break;
dev->in_int[c] = 0;
}
if ((j & 0x80) == 0)
return IRQ_NONE;
#ifdef ED_DBGP
printk("atp870u_intr_handle enter\n");
#endif
dev->in_int[c] = 1;
cmdp = atp_readb_io(dev, c, 0x10);
if (dev->working[c] != 0) {
if (is885(dev)) {
if ((atp_readb_io(dev, c, 0x16) & 0x80) == 0)
atp_writeb_io(dev, c, 0x16, (atp_readb_io(dev, c, 0x16) | 0x80));
}
if ((atp_readb_pci(dev, c, 0x00) & 0x08) != 0)
{
for (k=0; k < 1000; k++) {
if ((atp_readb_pci(dev, c, 2) & 0x08) == 0)
break;
if ((atp_readb_pci(dev, c, 2) & 0x01) == 0)
break;
}
}
atp_writeb_pci(dev, c, 0, 0x00);
i = atp_readb_io(dev, c, 0x17);
if (is885(dev))
atp_writeb_pci(dev, c, 2, 0x06);
target_id = atp_readb_io(dev, c, 0x15);
/*
* Remap wide devices onto id numbers
*/
if ((target_id & 0x40) != 0) {
target_id = (target_id & 0x07) | 0x08;
} else {
target_id &= 0x07;
}
if ((j & 0x40) != 0) {
if (dev->last_cmd[c] == 0xff) {
dev->last_cmd[c] = target_id;
}
dev->last_cmd[c] |= 0x40;
}
if (is885(dev))
dev->r1f[c][target_id] |= j;
#ifdef ED_DBGP
printk("atp870u_intr_handle status = %x\n",i);
#endif
if (i == 0x85) {
if ((dev->last_cmd[c] & 0xf0) != 0x40) {
dev->last_cmd[c] = 0xff;
}
if (is885(dev)) {
adrcnt = 0;
((unsigned char *) &adrcnt)[2] = atp_readb_io(dev, c, 0x12);
((unsigned char *) &adrcnt)[1] = atp_readb_io(dev, c, 0x13);
((unsigned char *) &adrcnt)[0] = atp_readb_io(dev, c, 0x14);
if (dev->id[c][target_id].last_len != adrcnt)
{
k = dev->id[c][target_id].last_len;
k -= adrcnt;
dev->id[c][target_id].tran_len = k;
dev->id[c][target_id].last_len = adrcnt;
}
#ifdef ED_DBGP
printk("dev->id[c][target_id].last_len = %d dev->id[c][target_id].tran_len = %d\n",dev->id[c][target_id].last_len,dev->id[c][target_id].tran_len);
#endif
}
/*
* Flip wide
*/
if (dev->wide_id[c] != 0) {
atp_writeb_io(dev, c, 0x1b, 0x01);
while ((atp_readb_io(dev, c, 0x1b) & 0x01) != 0x01)
atp_writeb_io(dev, c, 0x1b, 0x01);
}
/*
* Issue more commands
*/
spin_lock_irqsave(dev->host->host_lock, flags);
if (((dev->quhd[c] != dev->quend[c]) || (dev->last_cmd[c] != 0xff)) &&
(dev->in_snd[c] == 0)) {
#ifdef ED_DBGP
printk("Call sent_s870\n");
#endif
send_s870(dev,c);
}
spin_unlock_irqrestore(dev->host->host_lock, flags);
/*
* Done
*/
dev->in_int[c] = 0;
#ifdef ED_DBGP
printk("Status 0x85 return\n");
#endif
return IRQ_HANDLED;
}
if (i == 0x40) {
dev->last_cmd[c] |= 0x40;
dev->in_int[c] = 0;
return IRQ_HANDLED;
}
if (i == 0x21) {
if ((dev->last_cmd[c] & 0xf0) != 0x40) {
dev->last_cmd[c] = 0xff;
}
adrcnt = 0;
((unsigned char *) &adrcnt)[2] = atp_readb_io(dev, c, 0x12);
((unsigned char *) &adrcnt)[1] = atp_readb_io(dev, c, 0x13);
((unsigned char *) &adrcnt)[0] = atp_readb_io(dev, c, 0x14);
k = dev->id[c][target_id].last_len;
k -= adrcnt;
dev->id[c][target_id].tran_len = k;
dev->id[c][target_id].last_len = adrcnt;
atp_writeb_io(dev, c, 0x10, 0x41);
atp_writeb_io(dev, c, 0x18, 0x08);
dev->in_int[c] = 0;
return IRQ_HANDLED;
}
if (is885(dev)) {
if ((i == 0x4c) || (i == 0x4d) || (i == 0x8c) || (i == 0x8d)) {
if ((i == 0x4c) || (i == 0x8c))
i=0x48;
else
i=0x49;
}
}
if ((i == 0x80) || (i == 0x8f)) {
#ifdef ED_DBGP
printk(KERN_DEBUG "Device reselect\n");
#endif
lun = 0;
if (cmdp == 0x44 || i == 0x80)
lun = atp_readb_io(dev, c, 0x1d) & 0x07;
else {
if ((dev->last_cmd[c] & 0xf0) != 0x40) {
dev->last_cmd[c] = 0xff;
}
if (cmdp == 0x41) {
#ifdef ED_DBGP
printk("cmdp = 0x41\n");
#endif
adrcnt = 0;
((unsigned char *) &adrcnt)[2] = atp_readb_io(dev, c, 0x12);
((unsigned char *) &adrcnt)[1] = atp_readb_io(dev, c, 0x13);
((unsigned char *) &adrcnt)[0] = atp_readb_io(dev, c, 0x14);
k = dev->id[c][target_id].last_len;
k -= adrcnt;
dev->id[c][target_id].tran_len = k;
dev->id[c][target_id].last_len = adrcnt;
atp_writeb_io(dev, c, 0x18, 0x08);
dev->in_int[c] = 0;
return IRQ_HANDLED;
} else {
#ifdef ED_DBGP
printk("cmdp != 0x41\n");
#endif
atp_writeb_io(dev, c, 0x10, 0x46);
dev->id[c][target_id].dirct = 0x00;
atp_writeb_io(dev, c, 0x12, 0x00);
atp_writeb_io(dev, c, 0x13, 0x00);
atp_writeb_io(dev, c, 0x14, 0x00);
atp_writeb_io(dev, c, 0x18, 0x08);
dev->in_int[c] = 0;
return IRQ_HANDLED;
}
}
if (dev->last_cmd[c] != 0xff) {
dev->last_cmd[c] |= 0x40;
}
if (is885(dev)) {
j = atp_readb_base(dev, 0x29) & 0xfe;
atp_writeb_base(dev, 0x29, j);
} else
atp_writeb_io(dev, c, 0x10, 0x45);
target_id = atp_readb_io(dev, c, 0x16);
/*
* Remap wide identifiers
*/
if ((target_id & 0x10) != 0) {
target_id = (target_id & 0x07) | 0x08;
} else {
target_id &= 0x07;
}
if (is885(dev))
atp_writeb_io(dev, c, 0x10, 0x45);
workreq = dev->id[c][target_id].curr_req;
#ifdef ED_DBGP
scmd_printk(KERN_DEBUG, workreq, "CDB");
for (l = 0; l < workreq->cmd_len; l++)
printk(KERN_DEBUG " %x",workreq->cmnd[l]);
printk("\n");
#endif
atp_writeb_io(dev, c, 0x0f, lun);
atp_writeb_io(dev, c, 0x11, dev->id[c][target_id].devsp);
adrcnt = dev->id[c][target_id].tran_len;
k = dev->id[c][target_id].last_len;
atp_writeb_io(dev, c, 0x12, ((unsigned char *) &k)[2]);
atp_writeb_io(dev, c, 0x13, ((unsigned char *) &k)[1]);
atp_writeb_io(dev, c, 0x14, ((unsigned char *) &k)[0]);
#ifdef ED_DBGP
printk("k %x, k[0] 0x%x k[1] 0x%x k[2] 0x%x\n", k, atp_readb_io(dev, c, 0x14), atp_readb_io(dev, c, 0x13), atp_readb_io(dev, c, 0x12));
#endif
/* Remap wide */
j = target_id;
if (target_id > 7) {
j = (j & 0x07) | 0x40;
}
/* Add direction */
j |= dev->id[c][target_id].dirct;
atp_writeb_io(dev, c, 0x15, j);
atp_writeb_io(dev, c, 0x16, 0x80);
/* enable 32 bit fifo transfer */
if (is885(dev)) {
i = atp_readb_pci(dev, c, 1) & 0xf3;
//j=workreq->cmnd[0];
if ((workreq->cmnd[0] == 0x08) || (workreq->cmnd[0] == 0x28) || (workreq->cmnd[0] == 0x0a) || (workreq->cmnd[0] == 0x2a)) {
i |= 0x0c;
}
atp_writeb_pci(dev, c, 1, i);
} else if (is880(dev)) {
if ((workreq->cmnd[0] == 0x08) || (workreq->cmnd[0] == 0x28) || (workreq->cmnd[0] == 0x0a) || (workreq->cmnd[0] == 0x2a))
atp_writeb_base(dev, 0x3b, (atp_readb_base(dev, 0x3b) & 0x3f) | 0xc0);
else
atp_writeb_base(dev, 0x3b, atp_readb_base(dev, 0x3b) & 0x3f);
} else {
if ((workreq->cmnd[0] == 0x08) || (workreq->cmnd[0] == 0x28) || (workreq->cmnd[0] == 0x0a) || (workreq->cmnd[0] == 0x2a))
atp_writeb_base(dev, 0x3a, (atp_readb_base(dev, 0x3a) & 0xf3) | 0x08);
else
atp_writeb_base(dev, 0x3a, atp_readb_base(dev, 0x3a) & 0xf3);
}
j = 0;
id = 1;
id = id << target_id;
/*
* Is this a wide device
*/
if ((id & dev->wide_id[c]) != 0) {
j |= 0x01;
}
atp_writeb_io(dev, c, 0x1b, j);
while ((atp_readb_io(dev, c, 0x1b) & 0x01) != j)
atp_writeb_io(dev, c, 0x1b, j);
if (dev->id[c][target_id].last_len == 0) {
atp_writeb_io(dev, c, 0x18, 0x08);
dev->in_int[c] = 0;
#ifdef ED_DBGP
printk("dev->id[c][target_id].last_len = 0\n");
#endif
return IRQ_HANDLED;
}
#ifdef ED_DBGP
printk("target_id = %d adrcnt = %d\n",target_id,adrcnt);
#endif
prd = dev->id[c][target_id].prd_pos;
while (adrcnt != 0) {
id = ((unsigned short int *)prd)[2];
if (id == 0) {
k = 0x10000;
} else {
k = id;
}
if (k > adrcnt) {
((unsigned short int *)prd)[2] = (unsigned short int)
(k - adrcnt);
((unsigned long *)prd)[0] += adrcnt;
adrcnt = 0;
dev->id[c][target_id].prd_pos = prd;
} else {
adrcnt -= k;
dev->id[c][target_id].prdaddr += 0x08;
prd += 0x08;
if (adrcnt == 0) {
dev->id[c][target_id].prd_pos = prd;
}
}
}
atp_writel_pci(dev, c, 0x04, dev->id[c][target_id].prdaddr);
#ifdef ED_DBGP
printk("dev->id[%d][%d].prdaddr 0x%8x\n", c, target_id, dev->id[c][target_id].prdaddr);
#endif
if (!is885(dev)) {
atp_writeb_pci(dev, c, 2, 0x06);
atp_writeb_pci(dev, c, 2, 0x00);
}
/*
* Check transfer direction
*/
if (dev->id[c][target_id].dirct != 0) {
atp_writeb_io(dev, c, 0x18, 0x08);
atp_writeb_pci(dev, c, 0, 0x01);
dev->in_int[c] = 0;
#ifdef ED_DBGP
printk("status 0x80 return dirct != 0\n");
#endif
return IRQ_HANDLED;
}
atp_writeb_io(dev, c, 0x18, 0x08);
atp_writeb_pci(dev, c, 0, 0x09);
dev->in_int[c] = 0;
#ifdef ED_DBGP
printk("status 0x80 return dirct = 0\n");
#endif
return IRQ_HANDLED;
}
/*
* Current scsi request on this target
*/
workreq = dev->id[c][target_id].curr_req;
if (i == 0x42 || i == 0x16) {
if ((dev->last_cmd[c] & 0xf0) != 0x40) {
dev->last_cmd[c] = 0xff;
}
if (i == 0x16) {
workreq->result = atp_readb_io(dev, c, 0x0f);
if (((dev->r1f[c][target_id] & 0x10) != 0) && is885(dev)) {
printk(KERN_WARNING "AEC67162 CRC ERROR !\n");
workreq->result = 0x02;
}
} else
workreq->result = 0x02;
if (is885(dev)) {
j = atp_readb_base(dev, 0x29) | 0x01;
atp_writeb_base(dev, 0x29, j);
}
/*
* Complete the command
*/
scsi_dma_unmap(workreq);
spin_lock_irqsave(dev->host->host_lock, flags);
(*workreq->scsi_done) (workreq);
#ifdef ED_DBGP
printk("workreq->scsi_done\n");
#endif
/*
* Clear it off the queue
*/
dev->id[c][target_id].curr_req = NULL;
dev->working[c]--;
spin_unlock_irqrestore(dev->host->host_lock, flags);
/*
* Take it back wide
*/
if (dev->wide_id[c] != 0) {
atp_writeb_io(dev, c, 0x1b, 0x01);
while ((atp_readb_io(dev, c, 0x1b) & 0x01) != 0x01)
atp_writeb_io(dev, c, 0x1b, 0x01);
}
/*
* If there is stuff to send and nothing going then send it
*/
spin_lock_irqsave(dev->host->host_lock, flags);
if (((dev->last_cmd[c] != 0xff) || (dev->quhd[c] != dev->quend[c])) &&
(dev->in_snd[c] == 0)) {
#ifdef ED_DBGP
printk("Call sent_s870(scsi_done)\n");
#endif
send_s870(dev,c);
}
spin_unlock_irqrestore(dev->host->host_lock, flags);
dev->in_int[c] = 0;
return IRQ_HANDLED;
}
if ((dev->last_cmd[c] & 0xf0) != 0x40) {
dev->last_cmd[c] = 0xff;
}
if (i == 0x4f) {
i = 0x89;
}
i &= 0x0f;
if (i == 0x09) {
atp_writel_pci(dev, c, 4, dev->id[c][target_id].prdaddr);
atp_writeb_pci(dev, c, 2, 0x06);
atp_writeb_pci(dev, c, 2, 0x00);
atp_writeb_io(dev, c, 0x10, 0x41);
if (is885(dev)) {
k = dev->id[c][target_id].last_len;
atp_writeb_io(dev, c, 0x12, ((unsigned char *) (&k))[2]);
atp_writeb_io(dev, c, 0x13, ((unsigned char *) (&k))[1]);
atp_writeb_io(dev, c, 0x14, ((unsigned char *) (&k))[0]);
dev->id[c][target_id].dirct = 0x00;
} else {
dev->id[c][target_id].dirct = 0x00;
}
atp_writeb_io(dev, c, 0x18, 0x08);
atp_writeb_pci(dev, c, 0, 0x09);
dev->in_int[c] = 0;
return IRQ_HANDLED;
}
if (i == 0x08) {
atp_writel_pci(dev, c, 4, dev->id[c][target_id].prdaddr);
atp_writeb_pci(dev, c, 2, 0x06);
atp_writeb_pci(dev, c, 2, 0x00);
atp_writeb_io(dev, c, 0x10, 0x41);
if (is885(dev)) {
k = dev->id[c][target_id].last_len;
atp_writeb_io(dev, c, 0x12, ((unsigned char *) (&k))[2]);
atp_writeb_io(dev, c, 0x13, ((unsigned char *) (&k))[1]);
atp_writeb_io(dev, c, 0x14, ((unsigned char *) (&k))[0]);
}
atp_writeb_io(dev, c, 0x15, atp_readb_io(dev, c, 0x15) | 0x20);
dev->id[c][target_id].dirct = 0x20;
atp_writeb_io(dev, c, 0x18, 0x08);
atp_writeb_pci(dev, c, 0, 0x01);
dev->in_int[c] = 0;
return IRQ_HANDLED;
}
if (i == 0x0a)
atp_writeb_io(dev, c, 0x10, 0x30);
else
atp_writeb_io(dev, c, 0x10, 0x46);
dev->id[c][target_id].dirct = 0x00;
atp_writeb_io(dev, c, 0x12, 0x00);
atp_writeb_io(dev, c, 0x13, 0x00);
atp_writeb_io(dev, c, 0x14, 0x00);
atp_writeb_io(dev, c, 0x18, 0x08);
}
dev->in_int[c] = 0;
return IRQ_HANDLED;
}
/**
* atp870u_queuecommand - Queue SCSI command
* @req_p: request block
* @done: completion function
*
* Queue a command to the ATP queue. Called with the host lock held.
*/
static int atp870u_queuecommand_lck(struct scsi_cmnd *req_p,
void (*done) (struct scsi_cmnd *))
{
unsigned char c;
unsigned int m;
struct atp_unit *dev;
struct Scsi_Host *host;
c = scmd_channel(req_p);
req_p->sense_buffer[0]=0;
scsi_set_resid(req_p, 0);
if (scmd_channel(req_p) > 1) {
req_p->result = 0x00040000;
done(req_p);
#ifdef ED_DBGP
printk("atp870u_queuecommand : req_p->device->channel > 1\n");
#endif
return 0;
}
host = req_p->device->host;
dev = (struct atp_unit *)&host->hostdata;
m = 1;
m = m << scmd_id(req_p);
/*
* Fake a timeout for missing targets
*/
if ((m & dev->active_id[c]) == 0) {
req_p->result = 0x00040000;
done(req_p);
return 0;
}
if (done) {
req_p->scsi_done = done;
} else {
#ifdef ED_DBGP
printk( "atp870u_queuecommand: done can't be NULL\n");
#endif
req_p->result = 0;
done(req_p);
return 0;
}
/*
* Count new command
*/
dev->quend[c]++;
if (dev->quend[c] >= qcnt) {
dev->quend[c] = 0;
}
/*
* Check queue state
*/
if (dev->quhd[c] == dev->quend[c]) {
if (dev->quend[c] == 0) {
dev->quend[c] = qcnt;
}
#ifdef ED_DBGP
printk("atp870u_queuecommand : dev->quhd[c] == dev->quend[c]\n");
#endif
dev->quend[c]--;
req_p->result = 0x00020000;
done(req_p);
return 0;
}
dev->quereq[c][dev->quend[c]] = req_p;
#ifdef ED_DBGP
printk("dev->ioport[c] = %x atp_readb_io(dev, c, 0x1c) = %x dev->in_int[%d] = %d dev->in_snd[%d] = %d\n",dev->ioport[c],atp_readb_io(dev, c, 0x1c),c,dev->in_int[c],c,dev->in_snd[c]);
#endif
if ((atp_readb_io(dev, c, 0x1c) == 0) && (dev->in_int[c] == 0) && (dev->in_snd[c] == 0)) {
#ifdef ED_DBGP
printk("Call sent_s870(atp870u_queuecommand)\n");
#endif
send_s870(dev,c);
}
#ifdef ED_DBGP
printk("atp870u_queuecommand : exit\n");
#endif
return 0;
}
static DEF_SCSI_QCMD(atp870u_queuecommand)
/**
* send_s870 - send a command to the controller
* @host: host
*
* On entry there is work queued to be done. We move some of that work to the
* controller itself.
*
* Caller holds the host lock.
*/
static void send_s870(struct atp_unit *dev,unsigned char c)
{
struct scsi_cmnd *workreq = NULL;
unsigned int i;//,k;
unsigned char j, target_id;
unsigned char *prd;
unsigned short int w;
unsigned long l, bttl = 0;
unsigned long sg_count;
if (dev->in_snd[c] != 0) {
#ifdef ED_DBGP
printk("cmnd in_snd\n");
#endif
return;
}
#ifdef ED_DBGP
printk("Sent_s870 enter\n");
#endif
dev->in_snd[c] = 1;
if ((dev->last_cmd[c] != 0xff) && ((dev->last_cmd[c] & 0x40) != 0)) {
dev->last_cmd[c] &= 0x0f;
workreq = dev->id[c][dev->last_cmd[c]].curr_req;
if (!workreq) {
dev->last_cmd[c] = 0xff;
if (dev->quhd[c] == dev->quend[c]) {
dev->in_snd[c] = 0;
return;
}
}
}
if (!workreq) {
if ((dev->last_cmd[c] != 0xff) && (dev->working[c] != 0)) {
dev->in_snd[c] = 0;
return;
}
dev->working[c]++;
j = dev->quhd[c];
dev->quhd[c]++;
if (dev->quhd[c] >= qcnt)
dev->quhd[c] = 0;
workreq = dev->quereq[c][dev->quhd[c]];
if (dev->id[c][scmd_id(workreq)].curr_req != NULL) {
dev->quhd[c] = j;
dev->working[c]--;
dev->in_snd[c] = 0;
return;
}
dev->id[c][scmd_id(workreq)].curr_req = workreq;
dev->last_cmd[c] = scmd_id(workreq);
}
if ((atp_readb_io(dev, c, 0x1f) & 0xb0) != 0 || atp_readb_io(dev, c, 0x1c) != 0) {
#ifdef ED_DBGP
printk("Abort to Send\n");
#endif
dev->last_cmd[c] |= 0x40;
dev->in_snd[c] = 0;
return;
}
#ifdef ED_DBGP
printk("OK to Send\n");
scmd_printk(KERN_DEBUG, workreq, "CDB");
for(i=0;i<workreq->cmd_len;i++) {
printk(" %x",workreq->cmnd[i]);
}
printk("\n");
#endif
l = scsi_bufflen(workreq);
if (is885(dev)) {
j = atp_readb_base(dev, 0x29) & 0xfe;
atp_writeb_base(dev, 0x29, j);
dev->r1f[c][scmd_id(workreq)] = 0;
}
if (workreq->cmnd[0] == READ_CAPACITY) {
if (l > 8)
l = 8;
}
if (workreq->cmnd[0] == 0x00) {
l = 0;
}
j = 0;
target_id = scmd_id(workreq);
/*
* Wide ?
*/
w = 1;
w = w << target_id;
if ((w & dev->wide_id[c]) != 0) {
j |= 0x01;
}
atp_writeb_io(dev, c, 0x1b, j);
while ((atp_readb_io(dev, c, 0x1b) & 0x01) != j) {
atp_writeb_pci(dev, c, 0x1b, j);
#ifdef ED_DBGP
printk("send_s870 while loop 1\n");
#endif
}
/*
* Write the command
*/
atp_writeb_io(dev, c, 0x00, workreq->cmd_len);
atp_writeb_io(dev, c, 0x01, 0x2c);
if (is885(dev))
atp_writeb_io(dev, c, 0x02, 0x7f);
else
atp_writeb_io(dev, c, 0x02, 0xcf);
for (i = 0; i < workreq->cmd_len; i++)
atp_writeb_io(dev, c, 0x03 + i, workreq->cmnd[i]);
atp_writeb_io(dev, c, 0x0f, workreq->device->lun);
/*
* Write the target
*/
atp_writeb_io(dev, c, 0x11, dev->id[c][target_id].devsp);
#ifdef ED_DBGP
printk("dev->id[%d][%d].devsp = %2x\n",c,target_id,dev->id[c][target_id].devsp);
#endif
sg_count = scsi_dma_map(workreq);
/*
* Write transfer size
*/
atp_writeb_io(dev, c, 0x12, ((unsigned char *) (&l))[2]);
atp_writeb_io(dev, c, 0x13, ((unsigned char *) (&l))[1]);
atp_writeb_io(dev, c, 0x14, ((unsigned char *) (&l))[0]);
j = target_id;
dev->id[c][j].last_len = l;
dev->id[c][j].tran_len = 0;
#ifdef ED_DBGP
printk("dev->id[%2d][%2d].last_len = %d\n",c,j,dev->id[c][j].last_len);
#endif
/*
* Flip the wide bits
*/
if ((j & 0x08) != 0) {
j = (j & 0x07) | 0x40;
}
/*
* Check transfer direction
*/
if (workreq->sc_data_direction == DMA_TO_DEVICE)
atp_writeb_io(dev, c, 0x15, j | 0x20);
else
atp_writeb_io(dev, c, 0x15, j);
atp_writeb_io(dev, c, 0x16, atp_readb_io(dev, c, 0x16) | 0x80);
atp_writeb_io(dev, c, 0x16, 0x80);
dev->id[c][target_id].dirct = 0;
if (l == 0) {
if (atp_readb_io(dev, c, 0x1c) == 0) {
#ifdef ED_DBGP
printk("change SCSI_CMD_REG 0x08\n");
#endif
atp_writeb_io(dev, c, 0x18, 0x08);
} else
dev->last_cmd[c] |= 0x40;
dev->in_snd[c] = 0;
return;
}
prd = dev->id[c][target_id].prd_table;
dev->id[c][target_id].prd_pos = prd;
/*
* Now write the request list. Either as scatter/gather or as
* a linear chain.
*/
if (l) {
struct scatterlist *sgpnt;
i = 0;
scsi_for_each_sg(workreq, sgpnt, sg_count, j) {
bttl = sg_dma_address(sgpnt);
l=sg_dma_len(sgpnt);
#ifdef ED_DBGP
printk("1. bttl %x, l %x\n",bttl, l);
#endif
while (l > 0x10000) {
(((u16 *) (prd))[i + 3]) = 0x0000;
(((u16 *) (prd))[i + 2]) = 0x0000;
(((u32 *) (prd))[i >> 1]) = cpu_to_le32(bttl);
l -= 0x10000;
bttl += 0x10000;
i += 0x04;
}
(((u32 *) (prd))[i >> 1]) = cpu_to_le32(bttl);
(((u16 *) (prd))[i + 2]) = cpu_to_le16(l);
(((u16 *) (prd))[i + 3]) = 0;
i += 0x04;
}
(((u16 *) (prd))[i - 1]) = cpu_to_le16(0x8000);
#ifdef ED_DBGP
printk("prd %4x %4x %4x %4x\n",(((unsigned short int *)prd)[0]),(((unsigned short int *)prd)[1]),(((unsigned short int *)prd)[2]),(((unsigned short int *)prd)[3]));
printk("2. bttl %x, l %x\n",bttl, l);
#endif
}
#ifdef ED_DBGP
printk("send_s870: prdaddr_2 0x%8x target_id %d\n", dev->id[c][target_id].prdaddr,target_id);
#endif
dev->id[c][target_id].prdaddr = dev->id[c][target_id].prd_bus;
atp_writel_pci(dev, c, 4, dev->id[c][target_id].prdaddr);
atp_writeb_pci(dev, c, 2, 0x06);
atp_writeb_pci(dev, c, 2, 0x00);
if (is885(dev)) {
j = atp_readb_pci(dev, c, 1) & 0xf3;
if ((workreq->cmnd[0] == 0x08) || (workreq->cmnd[0] == 0x28) ||
(workreq->cmnd[0] == 0x0a) || (workreq->cmnd[0] == 0x2a)) {
j |= 0x0c;
}
atp_writeb_pci(dev, c, 1, j);
} else if (is880(dev)) {
if ((workreq->cmnd[0] == 0x08) || (workreq->cmnd[0] == 0x28) || (workreq->cmnd[0] == 0x0a) || (workreq->cmnd[0] == 0x2a))
atp_writeb_base(dev, 0x3b, (atp_readb_base(dev, 0x3b) & 0x3f) | 0xc0);
else
atp_writeb_base(dev, 0x3b, atp_readb_base(dev, 0x3b) & 0x3f);
} else {
if ((workreq->cmnd[0] == 0x08) || (workreq->cmnd[0] == 0x28) || (workreq->cmnd[0] == 0x0a) || (workreq->cmnd[0] == 0x2a))
atp_writeb_base(dev, 0x3a, (atp_readb_base(dev, 0x3a) & 0xf3) | 0x08);
else
atp_writeb_base(dev, 0x3a, atp_readb_base(dev, 0x3a) & 0xf3);
}
if(workreq->sc_data_direction == DMA_TO_DEVICE) {
dev->id[c][target_id].dirct = 0x20;
if (atp_readb_io(dev, c, 0x1c) == 0) {
atp_writeb_io(dev, c, 0x18, 0x08);
atp_writeb_pci(dev, c, 0, 0x01);
#ifdef ED_DBGP
printk( "start DMA(to target)\n");
#endif
} else {
dev->last_cmd[c] |= 0x40;
}
dev->in_snd[c] = 0;
return;
}
if (atp_readb_io(dev, c, 0x1c) == 0) {
atp_writeb_io(dev, c, 0x18, 0x08);
atp_writeb_pci(dev, c, 0, 0x09);
#ifdef ED_DBGP
printk( "start DMA(to host)\n");
#endif
} else {
dev->last_cmd[c] |= 0x40;
}
dev->in_snd[c] = 0;
return;
}
static unsigned char fun_scam(struct atp_unit *dev, unsigned short int *val)
{
unsigned short int i, k;
unsigned char j;
atp_writew_io(dev, 0, 0x1c, *val);
for (i = 0; i < 10; i++) { /* stable >= bus settle delay(400 ns) */
k = atp_readw_io(dev, 0, 0x1c);
j = (unsigned char) (k >> 8);
if ((k & 0x8000) != 0) /* DB7 all release? */
i = 0;
}
*val |= 0x4000; /* assert DB6 */
atp_writew_io(dev, 0, 0x1c, *val);
*val &= 0xdfff; /* assert DB5 */
atp_writew_io(dev, 0, 0x1c, *val);
for (i = 0; i < 10; i++) { /* stable >= bus settle delay(400 ns) */
if ((atp_readw_io(dev, 0, 0x1c) & 0x2000) != 0) /* DB5 all release? */
i = 0;
}
*val |= 0x8000; /* no DB4-0, assert DB7 */
*val &= 0xe0ff;
atp_writew_io(dev, 0, 0x1c, *val);
*val &= 0xbfff; /* release DB6 */
atp_writew_io(dev, 0, 0x1c, *val);
for (i = 0; i < 10; i++) { /* stable >= bus settle delay(400 ns) */
if ((atp_readw_io(dev, 0, 0x1c) & 0x4000) != 0) /* DB6 all release? */
i = 0;
}
return j;
}
static void tscam(struct Scsi_Host *host, bool wide_chip, u8 scam_on)
{
unsigned char i, j, k;
unsigned long n;
unsigned short int m, assignid_map, val;
unsigned char mbuf[33], quintet[2];
struct atp_unit *dev = (struct atp_unit *)&host->hostdata;
static unsigned char g2q_tab[8] = {
0x38, 0x31, 0x32, 0x2b, 0x34, 0x2d, 0x2e, 0x27
};
/* I can't believe we need this before we've even done anything. Remove it
* and see if anyone bitches.
for (i = 0; i < 0x10; i++) {
udelay(0xffff);
}
*/
atp_writeb_io(dev, 0, 1, 0x08);
atp_writeb_io(dev, 0, 2, 0x7f);
atp_writeb_io(dev, 0, 0x11, 0x20);
if ((scam_on & 0x40) == 0) {
return;
}
m = 1;
m <<= dev->host_id[0];
j = 16;
if (!wide_chip) {
m |= 0xff00;
j = 8;
}
assignid_map = m;
atp_writeb_io(dev, 0, 0x02, 0x02); /* 2*2=4ms,3EH 2/32*3E=3.9ms */