X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=drivers%2Fscsi%2Fppa.c;h=19f0b93fa3d85a283bcfb77125def4d38845e3cd;hb=0854065092a7a49a88bb592473abafb0cecd9f1c;hp=909c49541984a1ea67c7d381f21d9c8540515388;hpb=58390c8ce1bddb6c623f62e7ed36383e7fa5c02f;p=linux-2.6-block.git

diff --git a/drivers/scsi/ppa.c b/drivers/scsi/ppa.c
index 909c49541984..19f0b93fa3d8 100644
--- a/drivers/scsi/ppa.c
+++ b/drivers/scsi/ppa.c
@@ -45,6 +45,11 @@ typedef struct {
 
 #include  "ppa.h"
 
+static unsigned int mode = PPA_AUTODETECT;
+module_param(mode, uint, 0644);
+MODULE_PARM_DESC(mode, "Transfer mode (0 = Autodetect, 1 = SPP 4-bit, "
+	"2 = SPP 8-bit, 3 = EPP 8-bit, 4 = EPP 16-bit, 5 = EPP 32-bit");
+
 static struct scsi_pointer *ppa_scsi_pointer(struct scsi_cmnd *cmd)
 {
 	return scsi_cmd_priv(cmd);
@@ -157,7 +162,7 @@ static int ppa_show_info(struct seq_file *m, struct Scsi_Host *host)
 	return 0;
 }
 
-static int device_check(ppa_struct *dev);
+static int device_check(ppa_struct *dev, bool autodetect);
 
 #if PPA_DEBUG > 0
 #define ppa_fail(x,y) printk("ppa: ppa_fail(%i) from %s at line %d\n",\
@@ -302,13 +307,10 @@ static int ppa_out(ppa_struct *dev, char *buffer, int len)
 	case PPA_EPP_8:
 		epp_reset(ppb);
 		w_ctr(ppb, 0x4);
-#ifdef CONFIG_SCSI_IZIP_EPP16
-		if (!(((long) buffer | len) & 0x01))
-			outsw(ppb + 4, buffer, len >> 1);
-#else
-		if (!(((long) buffer | len) & 0x03))
+		if (dev->mode == PPA_EPP_32 && !(((long) buffer | len) & 0x01))
 			outsl(ppb + 4, buffer, len >> 2);
-#endif
+		else if (dev->mode == PPA_EPP_16 && !(((long) buffer | len) & 0x03))
+			outsw(ppb + 4, buffer, len >> 1);
 		else
 			outsb(ppb + 4, buffer, len);
 		w_ctr(ppb, 0xc);
@@ -355,13 +357,10 @@ static int ppa_in(ppa_struct *dev, char *buffer, int len)
 	case PPA_EPP_8:
 		epp_reset(ppb);
 		w_ctr(ppb, 0x24);
-#ifdef CONFIG_SCSI_IZIP_EPP16
-		if (!(((long) buffer | len) & 0x01))
-			insw(ppb + 4, buffer, len >> 1);
-#else
-		if (!(((long) buffer | len) & 0x03))
+		if (dev->mode == PPA_EPP_32 && !(((long) buffer | len) & 0x03))
 			insl(ppb + 4, buffer, len >> 2);
-#endif
+		else if (dev->mode == PPA_EPP_16 && !(((long) buffer | len) & 0x01))
+			insw(ppb + 4, buffer, len >> 1);
 		else
 			insb(ppb + 4, buffer, len);
 		w_ctr(ppb, 0x2c);
@@ -469,6 +468,27 @@ static int ppa_init(ppa_struct *dev)
 {
 	int retv;
 	unsigned short ppb = dev->base;
+	bool autodetect = dev->mode == PPA_AUTODETECT;
+
+	if (autodetect) {
+		int modes = dev->dev->port->modes;
+		int ppb_hi = dev->dev->port->base_hi;
+
+		/* Mode detection works up the chain of speed
+		 * This avoids a nasty if-then-else-if-... tree
+		 */
+		dev->mode = PPA_NIBBLE;
+
+		if (modes & PARPORT_MODE_TRISTATE)
+			dev->mode = PPA_PS2;
+
+		if (modes & PARPORT_MODE_ECP) {
+			w_ecr(ppb_hi, 0x20);
+			dev->mode = PPA_PS2;
+		}
+		if ((modes & PARPORT_MODE_EPP) && (modes & PARPORT_MODE_ECP))
+			w_ecr(ppb_hi, 0x80);
+	}
 
 	ppa_disconnect(dev);
 	ppa_connect(dev, CONNECT_NORMAL);
@@ -492,7 +512,7 @@ static int ppa_init(ppa_struct *dev)
 	if (retv)
 		return -EIO;
 
-	return device_check(dev);
+	return device_check(dev, autodetect);
 }
 
 static inline int ppa_send_command(struct scsi_cmnd *cmd)
@@ -637,7 +657,7 @@ static void ppa_interrupt(struct work_struct *work)
 	case DID_OK:
 		break;
 	case DID_NO_CONNECT:
-		printk(KERN_DEBUG "ppa: no device at SCSI ID %i\n", cmd->device->target);
+		printk(KERN_DEBUG "ppa: no device at SCSI ID %i\n", scmd_id(cmd));
 		break;
 	case DID_BUS_BUSY:
 		printk(KERN_DEBUG "ppa: BUS BUSY - EPP timeout detected\n");
@@ -883,7 +903,7 @@ static int ppa_reset(struct scsi_cmnd *cmd)
 	return SUCCESS;
 }
 
-static int device_check(ppa_struct *dev)
+static int device_check(ppa_struct *dev, bool autodetect)
 {
 	/* This routine looks for a device and then attempts to use EPP
 	   to send a command. If all goes as planned then EPP is available. */
@@ -895,8 +915,8 @@ static int device_check(ppa_struct *dev)
 	old_mode = dev->mode;
 	for (loop = 0; loop < 8; loop++) {
 		/* Attempt to use EPP for Test Unit Ready */
-		if ((ppb & 0x0007) == 0x0000)
-			dev->mode = PPA_EPP_32;
+		if (autodetect && (ppb & 0x0007) == 0x0000)
+			dev->mode = PPA_EPP_8;
 
 second_pass:
 		ppa_connect(dev, CONNECT_EPP_MAYBE);
@@ -924,7 +944,7 @@ second_pass:
 			udelay(1000);
 			ppa_disconnect(dev);
 			udelay(1000);
-			if (dev->mode == PPA_EPP_32) {
+			if (dev->mode != old_mode) {
 				dev->mode = old_mode;
 				goto second_pass;
 			}
@@ -947,7 +967,7 @@ second_pass:
 			udelay(1000);
 			ppa_disconnect(dev);
 			udelay(1000);
-			if (dev->mode == PPA_EPP_32) {
+			if (dev->mode != old_mode) {
 				dev->mode = old_mode;
 				goto second_pass;
 			}
@@ -1026,7 +1046,6 @@ static int __ppa_attach(struct parport *pb)
 	DEFINE_WAIT(wait);
 	ppa_struct *dev, *temp;
 	int ports;
-	int modes, ppb, ppb_hi;
 	int err = -ENOMEM;
 	struct pardev_cb ppa_cb;
 
@@ -1034,7 +1053,7 @@ static int __ppa_attach(struct parport *pb)
 	if (!dev)
 		return -ENOMEM;
 	dev->base = -1;
-	dev->mode = PPA_AUTODETECT;
+	dev->mode = mode < PPA_UNKNOWN ? mode : PPA_AUTODETECT;
 	dev->recon_tmo = PPA_RECON_TMO;
 	init_waitqueue_head(&waiting);
 	temp = find_parent();
@@ -1069,25 +1088,8 @@ static int __ppa_attach(struct parport *pb)
 	}
 	dev->waiting = NULL;
 	finish_wait(&waiting, &wait);
-	ppb = dev->base = dev->dev->port->base;
-	ppb_hi = dev->dev->port->base_hi;
-	w_ctr(ppb, 0x0c);
-	modes = dev->dev->port->modes;
-
-	/* Mode detection works up the chain of speed
-	 * This avoids a nasty if-then-else-if-... tree
-	 */
-	dev->mode = PPA_NIBBLE;
-
-	if (modes & PARPORT_MODE_TRISTATE)
-		dev->mode = PPA_PS2;
-
-	if (modes & PARPORT_MODE_ECP) {
-		w_ecr(ppb_hi, 0x20);
-		dev->mode = PPA_PS2;
-	}
-	if ((modes & PARPORT_MODE_EPP) && (modes & PARPORT_MODE_ECP))
-		w_ecr(ppb_hi, 0x80);
+	dev->base = dev->dev->port->base;
+	w_ctr(dev->base, 0x0c);
 
 	/* Done configuration */