Merge branch 'linux-2.6' into for-2.6.22

12 files changed, 3931 insertions, 4811 deletions

diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c
index bf5d63e1beee..656bdb1352d8 100644
--- a/drivers/scsi/3w-xxxx.c
+++ b/drivers/scsi/3w-xxxx.c
@@ -1864,10 +1864,17 @@ static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
 /* This function will handle the request sense scsi command */
 static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
 {
+	char request_buffer[18];
+
 	dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
 
-	/* For now we just zero the request buffer */
-	memset(tw_dev->srb[request_id]->request_buffer, 0, tw_dev->srb[request_id]->request_bufflen);
+	memset(request_buffer, 0, sizeof(request_buffer));
+	request_buffer[0] = 0x70; /* Immediate fixed format */
+	request_buffer[7] = 10;	/* minimum size per SPC: 18 bytes */
+	/* leave all other fields zero, giving effectively NO_SENSE return */
+	tw_transfer_internal(tw_dev, request_id, request_buffer,
+			     sizeof(request_buffer));
+
 	tw_dev->state[request_id] = TW_S_COMPLETED;
 	tw_state_request_finish(tw_dev, request_id);
 
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 4cd280e86966..fcc4cb6c7f46 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -1763,9 +1763,15 @@ config SUN3X_ESP
 	  The ESP was an on-board SCSI controller used on Sun 3/80
 	  machines.  Say Y here to compile in support for it.
 
+config SCSI_ESP_CORE
+	tristate "ESP Scsi Driver Core"
+	depends on SCSI
+	select SCSI_SPI_ATTRS
+
 config SCSI_SUNESP
 	tristate "Sparc ESP Scsi Driver"
 	depends on SBUS && SCSI
+	select SCSI_ESP_CORE
 	help
 	  This is the driver for the Sun ESP SCSI host adapter. The ESP
 	  chipset is present in most SPARC SBUS-based computers.
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 79ecf4ebe6eb..70cff4c599d7 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -106,7 +106,8 @@ obj-$(CONFIG_MEGARAID_LEGACY)	+= megaraid.o
 obj-$(CONFIG_MEGARAID_NEWGEN)	+= megaraid/
 obj-$(CONFIG_MEGARAID_SAS)	+= megaraid/
 obj-$(CONFIG_SCSI_ACARD)	+= atp870u.o
-obj-$(CONFIG_SCSI_SUNESP)	+= esp.o
+obj-$(CONFIG_SCSI_ESP_CORE)	+= esp_scsi.o
+obj-$(CONFIG_SCSI_SUNESP)	+= sun_esp.o
 obj-$(CONFIG_SCSI_GDTH)		+= gdth.o
 obj-$(CONFIG_SCSI_INITIO)	+= initio.o
 obj-$(CONFIG_SCSI_INIA100)	+= a100u2w.o
diff --git a/drivers/scsi/esp.c b/drivers/scsi/esp.c
deleted file mode 100644
index 2c2fe80bc42a..000000000000
--- a/drivers/scsi/esp.c
+++ /dev/null
@@ -1,4394 +0,0 @@
-/* esp.c: ESP Sun SCSI driver.
- *
- * Copyright (C) 1995, 1998, 2006 David S. Miller (davem@davemloft.net)
- */
-
-/* TODO:
- *
- * 1) Maybe disable parity checking in config register one for SCSI1
- *    targets.  (Gilmore says parity error on the SBus can lock up
- *    old sun4c's)
- * 2) Add support for DMA2 pipelining.
- * 3) Add tagged queueing.
- */
-
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/slab.h>
-#include <linux/blkdev.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-
-#include "esp.h"
-
-#include <asm/sbus.h>
-#include <asm/dma.h>
-#include <asm/system.h>
-#include <asm/ptrace.h>
-#include <asm/pgtable.h>
-#include <asm/oplib.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#ifndef __sparc_v9__
-#include <asm/machines.h>
-#include <asm/idprom.h>
-#endif
-
-#include <scsi/scsi.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_device.h>
-#include <scsi/scsi_eh.h>
-#include <scsi/scsi_host.h>
-#include <scsi/scsi_tcq.h>
-
-#define DRV_VERSION "1.101"
-
-#define DEBUG_ESP
-/* #define DEBUG_ESP_HME */
-/* #define DEBUG_ESP_DATA */
-/* #define DEBUG_ESP_QUEUE */
-/* #define DEBUG_ESP_DISCONNECT */
-/* #define DEBUG_ESP_STATUS */
-/* #define DEBUG_ESP_PHASES */
-/* #define DEBUG_ESP_WORKBUS */
-/* #define DEBUG_STATE_MACHINE */
-/* #define DEBUG_ESP_CMDS */
-/* #define DEBUG_ESP_IRQS */
-/* #define DEBUG_SDTR */
-/* #define DEBUG_ESP_SG */
-
-/* Use the following to sprinkle debugging messages in a way which
- * suits you if combinations of the above become too verbose when
- * trying to track down a specific problem.
- */
-/* #define DEBUG_ESP_MISC */
-
-#if defined(DEBUG_ESP)
-#define ESPLOG(foo)  printk foo
-#else
-#define ESPLOG(foo)
-#endif /* (DEBUG_ESP) */
-
-#if defined(DEBUG_ESP_HME)
-#define ESPHME(foo)  printk foo
-#else
-#define ESPHME(foo)
-#endif
-
-#if defined(DEBUG_ESP_DATA)
-#define ESPDATA(foo)  printk foo
-#else
-#define ESPDATA(foo)
-#endif
-
-#if defined(DEBUG_ESP_QUEUE)
-#define ESPQUEUE(foo)  printk foo
-#else
-#define ESPQUEUE(foo)
-#endif
-
-#if defined(DEBUG_ESP_DISCONNECT)
-#define ESPDISC(foo)  printk foo
-#else
-#define ESPDISC(foo)
-#endif
-
-#if defined(DEBUG_ESP_STATUS)
-#define ESPSTAT(foo)  printk foo
-#else
-#define ESPSTAT(foo)
-#endif
-
-#if defined(DEBUG_ESP_PHASES)
-#define ESPPHASE(foo)  printk foo
-#else
-#define ESPPHASE(foo)
-#endif
-
-#if defined(DEBUG_ESP_WORKBUS)
-#define ESPBUS(foo)  printk foo
-#else
-#define ESPBUS(foo)
-#endif
-
-#if defined(DEBUG_ESP_IRQS)
-#define ESPIRQ(foo)  printk foo
-#else
-#define ESPIRQ(foo)
-#endif
-
-#if defined(DEBUG_SDTR)
-#define ESPSDTR(foo)  printk foo
-#else
-#define ESPSDTR(foo)
-#endif
-
-#if defined(DEBUG_ESP_MISC)
-#define ESPMISC(foo)  printk foo
-#else
-#define ESPMISC(foo)
-#endif
-
-/* Command phase enumeration. */
-enum {
-	not_issued    = 0x00,  /* Still in the issue_SC queue.          */
-
-	/* Various forms of selecting a target. */
-#define in_slct_mask    0x10
-	in_slct_norm  = 0x10,  /* ESP is arbitrating, normal selection  */
-	in_slct_stop  = 0x11,  /* ESP will select, then stop with IRQ   */
-	in_slct_msg   = 0x12,  /* select, then send a message           */
-	in_slct_tag   = 0x13,  /* select and send tagged queue msg      */
-	in_slct_sneg  = 0x14,  /* select and acquire sync capabilities  */
-
-	/* Any post selection activity. */
-#define in_phases_mask  0x20
-	in_datain     = 0x20,  /* Data is transferring from the bus     */
-	in_dataout    = 0x21,  /* Data is transferring to the bus       */
-	in_data_done  = 0x22,  /* Last DMA data operation done (maybe)  */
-	in_msgin      = 0x23,  /* Eating message from target            */
-	in_msgincont  = 0x24,  /* Eating more msg bytes from target     */
-	in_msgindone  = 0x25,  /* Decide what to do with what we got    */
-	in_msgout     = 0x26,  /* Sending message to target             */
-	in_msgoutdone = 0x27,  /* Done sending msg out                  */
-	in_cmdbegin   = 0x28,  /* Sending cmd after abnormal selection  */
-	in_cmdend     = 0x29,  /* Done sending slow cmd                 */
-	in_status     = 0x2a,  /* Was in status phase, finishing cmd    */
-	in_freeing    = 0x2b,  /* freeing the bus for cmd cmplt or disc */
-	in_the_dark   = 0x2c,  /* Don't know what bus phase we are in   */
-
-	/* Special states, ie. not normal bus transitions... */
-#define in_spec_mask    0x80
-	in_abortone   = 0x80,  /* Aborting one command currently        */
-	in_abortall   = 0x81,  /* Blowing away all commands we have     */
-	in_resetdev   = 0x82,  /* SCSI target reset in progress         */
-	in_resetbus   = 0x83,  /* SCSI bus reset in progress            */
-	in_tgterror   = 0x84,  /* Target did something stupid           */
-};
-
-enum {
-	/* Zero has special meaning, see skipahead[12]. */
-/*0*/	do_never,
-
-/*1*/	do_phase_determine,
-/*2*/	do_reset_bus,
-/*3*/	do_reset_complete,
-/*4*/	do_work_bus,
-/*5*/	do_intr_end
-};
-
-/* Forward declarations. */
-static irqreturn_t esp_intr(int irq, void *dev_id);
-
-/* Debugging routines */
-struct esp_cmdstrings {
-	u8 cmdchar;
-	char *text;
-} esp_cmd_strings[] = {
-	/* Miscellaneous */
-	{ ESP_CMD_NULL, "ESP_NOP", },
-	{ ESP_CMD_FLUSH, "FIFO_FLUSH", },
-	{ ESP_CMD_RC, "RSTESP", },
-	{ ESP_CMD_RS, "RSTSCSI", },
-	/* Disconnected State Group */
-	{ ESP_CMD_RSEL, "RESLCTSEQ", },
-	{ ESP_CMD_SEL, "SLCTNATN", },
-	{ ESP_CMD_SELA, "SLCTATN", },
-	{ ESP_CMD_SELAS, "SLCTATNSTOP", },
-	{ ESP_CMD_ESEL, "ENSLCTRESEL", },
-	{ ESP_CMD_DSEL, "DISSELRESEL", },
-	{ ESP_CMD_SA3, "SLCTATN3", },
-	{ ESP_CMD_RSEL3, "RESLCTSEQ", },
-	/* Target State Group */
-	{ ESP_CMD_SMSG, "SNDMSG", },
-	{ ESP_CMD_SSTAT, "SNDSTATUS", },
-	{ ESP_CMD_SDATA, "SNDDATA", },
-	{ ESP_CMD_DSEQ, "DISCSEQ", },
-	{ ESP_CMD_TSEQ, "TERMSEQ", },
-	{ ESP_CMD_TCCSEQ, "TRGTCMDCOMPSEQ", },
-	{ ESP_CMD_DCNCT, "DISC", },
-	{ ESP_CMD_RMSG, "RCVMSG", },
-	{ ESP_CMD_RCMD, "RCVCMD", },
-	{ ESP_CMD_RDATA, "RCVDATA", },
-	{ ESP_CMD_RCSEQ, "RCVCMDSEQ", },
-	/* Initiator State Group */
-	{ ESP_CMD_TI, "TRANSINFO", },
-	{ ESP_CMD_ICCSEQ, "INICMDSEQCOMP", },
-	{ ESP_CMD_MOK, "MSGACCEPTED", },
-	{ ESP_CMD_TPAD, "TPAD", },
-	{ ESP_CMD_SATN, "SATN", },
-	{ ESP_CMD_RATN, "RATN", },
-};
-#define NUM_ESP_COMMANDS  ((sizeof(esp_cmd_strings)) / (sizeof(struct esp_cmdstrings)))
-
-/* Print textual representation of an ESP command */
-static inline void esp_print_cmd(u8 espcmd)
-{
-	u8 dma_bit = espcmd & ESP_CMD_DMA;
-	int i;
-
-	espcmd &= ~dma_bit;
-	for (i = 0; i < NUM_ESP_COMMANDS; i++)
-		if (esp_cmd_strings[i].cmdchar == espcmd)
-			break;
-	if (i == NUM_ESP_COMMANDS)
-		printk("ESP_Unknown");
-	else
-		printk("%s%s", esp_cmd_strings[i].text,
-		       ((dma_bit) ? "+DMA" : ""));
-}
-
-/* Print the status register's value */
-static inline void esp_print_statreg(u8 statreg)
-{
-	u8 phase;
-
-	printk("STATUS<");
-	phase = statreg & ESP_STAT_PMASK;
-	printk("%s,", (phase == ESP_DOP ? "DATA-OUT" :
-		       (phase == ESP_DIP ? "DATA-IN" :
-			(phase == ESP_CMDP ? "COMMAND" :
-			 (phase == ESP_STATP ? "STATUS" :
-			  (phase == ESP_MOP ? "MSG-OUT" :
-			   (phase == ESP_MIP ? "MSG_IN" :
-			    "unknown")))))));
-	if (statreg & ESP_STAT_TDONE)
-		printk("TRANS_DONE,");
-	if (statreg & ESP_STAT_TCNT)
-		printk("TCOUNT_ZERO,");
-	if (statreg & ESP_STAT_PERR)
-		printk("P_ERROR,");
-	if (statreg & ESP_STAT_SPAM)
-		printk("SPAM,");
-	if (statreg & ESP_STAT_INTR)
-		printk("IRQ,");
-	printk(">");
-}
-
-/* Print the interrupt register's value */
-static inline void esp_print_ireg(u8 intreg)
-{
-	printk("INTREG< ");
-	if (intreg & ESP_INTR_S)
-		printk("SLCT_NATN ");
-	if (intreg & ESP_INTR_SATN)
-		printk("SLCT_ATN ");
-	if (intreg & ESP_INTR_RSEL)
-		printk("RSLCT ");
-	if (intreg & ESP_INTR_FDONE)
-		printk("FDONE ");
-	if (intreg & ESP_INTR_BSERV)
-		printk("BSERV ");
-	if (intreg & ESP_INTR_DC)
-		printk("DISCNCT ");
-	if (intreg & ESP_INTR_IC)
-		printk("ILL_CMD ");
-	if (intreg & ESP_INTR_SR)
-		printk("SCSI_BUS_RESET ");
-	printk(">");
-}
-
-/* Print the sequence step registers contents */
-static inline void esp_print_seqreg(u8 stepreg)
-{
-	stepreg &= ESP_STEP_VBITS;
-	printk("STEP<%s>",
-	       (stepreg == ESP_STEP_ASEL ? "SLCT_ARB_CMPLT" :
-		(stepreg == ESP_STEP_SID ? "1BYTE_MSG_SENT" :
-		 (stepreg == ESP_STEP_NCMD ? "NOT_IN_CMD_PHASE" :
-		  (stepreg == ESP_STEP_PPC ? "CMD_BYTES_LOST" :
-		   (stepreg == ESP_STEP_FINI4 ? "CMD_SENT_OK" :
-		    "UNKNOWN"))))));
-}
-
-static char *phase_string(int phase)
-{
-	switch (phase) {
-	case not_issued:
-		return "UNISSUED";
-	case in_slct_norm:
-		return "SLCTNORM";
-	case in_slct_stop:
-		return "SLCTSTOP";
-	case in_slct_msg:
-		return "SLCTMSG";
-	case in_slct_tag:
-		return "SLCTTAG";
-	case in_slct_sneg:
-		return "SLCTSNEG";
-	case in_datain:
-		return "DATAIN";
-	case in_dataout:
-		return "DATAOUT";
-	case in_data_done:
-		return "DATADONE";
-	case in_msgin:
-		return "MSGIN";
-	case in_msgincont:
-		return "MSGINCONT";
-	case in_msgindone:
-		return "MSGINDONE";
-	case in_msgout:
-		return "MSGOUT";
-	case in_msgoutdone:
-		return "MSGOUTDONE";
-	case in_cmdbegin:
-		return "CMDBEGIN";
-	case in_cmdend:
-		return "CMDEND";
-	case in_status:
-		return "STATUS";
-	case in_freeing:
-		return "FREEING";
-	case in_the_dark:
-		return "CLUELESS";
-	case in_abortone:
-		return "ABORTONE";
-	case in_abortall:
-		return "ABORTALL";
-	case in_resetdev:
-		return "RESETDEV";
-	case in_resetbus:
-		return "RESETBUS";
-	case in_tgterror:
-		return "TGTERROR";
-	default:
-		return "UNKNOWN";
-	};
-}
-
-#ifdef DEBUG_STATE_MACHINE
-static inline void esp_advance_phase(struct scsi_cmnd *s, int newphase)
-{
-	ESPLOG(("<%s>", phase_string(newphase)));
-	s->SCp.sent_command = s->SCp.phase;
-	s->SCp.phase = newphase;
-}
-#else
-#define esp_advance_phase(__s, __newphase) \
-	(__s)->SCp.sent_command = (__s)->SCp.phase; \
-	(__s)->SCp.phase = (__newphase);
-#endif
-
-#ifdef DEBUG_ESP_CMDS
-static inline void esp_cmd(struct esp *esp, u8 cmd)
-{
-	esp->espcmdlog[esp->espcmdent] = cmd;
-	esp->espcmdent = (esp->espcmdent + 1) & 31;
-	sbus_writeb(cmd, esp->eregs + ESP_CMD);
-}
-#else
-#define esp_cmd(__esp, __cmd)	\
-	sbus_writeb((__cmd), ((__esp)->eregs) + ESP_CMD)
-#endif
-
-#define ESP_INTSOFF(__dregs)	\
-	sbus_writel(sbus_readl((__dregs)+DMA_CSR)&~(DMA_INT_ENAB), (__dregs)+DMA_CSR)
-#define ESP_INTSON(__dregs)	\
-	sbus_writel(sbus_readl((__dregs)+DMA_CSR)|DMA_INT_ENAB, (__dregs)+DMA_CSR)
-#define ESP_IRQ_P(__dregs)	\
-	(sbus_readl((__dregs)+DMA_CSR) & (DMA_HNDL_INTR|DMA_HNDL_ERROR))
-
-/* How we use the various Linux SCSI data structures for operation.
- *
- * struct scsi_cmnd:
- *
- *   We keep track of the synchronous capabilities of a target
- *   in the device member, using sync_min_period and
- *   sync_max_offset.  These are the values we directly write
- *   into the ESP registers while running a command.  If offset
- *   is zero the ESP will use asynchronous transfers.
- *   If the borken flag is set we assume we shouldn't even bother
- *   trying to negotiate for synchronous transfer as this target
- *   is really stupid.  If we notice the target is dropping the
- *   bus, and we have been allowing it to disconnect, we clear
- *   the disconnect flag.
- */
-
-
-/* Manipulation of the ESP command queues.  Thanks to the aha152x driver
- * and its author, Juergen E. Fischer, for the methods used here.
- * Note that these are per-ESP queues, not global queues like
- * the aha152x driver uses.
- */
-static inline void append_SC(struct scsi_cmnd **SC, struct scsi_cmnd *new_SC)
-{
-	struct scsi_cmnd *end;
-
-	new_SC->host_scribble = (unsigned char *) NULL;
-	if (!*SC)
-		*SC = new_SC;
-	else {
-		for (end=*SC;end->host_scribble;end=(struct scsi_cmnd *)end->host_scribble)
-			;
-		end->host_scribble = (unsigned char *) new_SC;
-	}
-}
-
-static inline void prepend_SC(struct scsi_cmnd **SC, struct scsi_cmnd *new_SC)
-{
-	new_SC->host_scribble = (unsigned char *) *SC;
-	*SC = new_SC;
-}
-
-static inline struct scsi_cmnd *remove_first_SC(struct scsi_cmnd **SC)
-{
-	struct scsi_cmnd *ptr;
-	ptr = *SC;
-	if (ptr)
-		*SC = (struct scsi_cmnd *) (*SC)->host_scribble;
-	return ptr;
-}
-
-static inline struct scsi_cmnd *remove_SC(struct scsi_cmnd **SC, int target, int lun)
-{
-	struct scsi_cmnd *ptr, *prev;
-
-	for (ptr = *SC, prev = NULL;
-	     ptr && ((ptr->device->id != target) || (ptr->device->lun != lun));
-	     prev = ptr, ptr = (struct scsi_cmnd *) ptr->host_scribble)
-		;
-	if (ptr) {
-		if (prev)
-			prev->host_scribble=ptr->host_scribble;
-		else
-			*SC=(struct scsi_cmnd *)ptr->host_scribble;
-	}
-	return ptr;
-}
-
-/* Resetting various pieces of the ESP scsi driver chipset/buses. */
-static void esp_reset_dma(struct esp *esp)
-{
-	int can_do_burst16, can_do_burst32, can_do_burst64;
-	int can_do_sbus64;
-	u32 tmp;
-
-	can_do_burst16 = (esp->bursts & DMA_BURST16) != 0;
-	can_do_burst32 = (esp->bursts & DMA_BURST32) != 0;
-	can_do_burst64 = 0;
-	can_do_sbus64 = 0;
-	if (sbus_can_dma_64bit(esp->sdev))
-		can_do_sbus64 = 1;
-	if (sbus_can_burst64(esp->sdev))
-		can_do_burst64 = (esp->bursts & DMA_BURST64) != 0;
-
-	/* Punt the DVMA into a known state. */
-	if (esp->dma->revision != dvmahme) {
-		tmp = sbus_readl(esp->dregs + DMA_CSR);
-		sbus_writel(tmp | DMA_RST_SCSI, esp->dregs + DMA_CSR);
-		sbus_writel(tmp & ~DMA_RST_SCSI, esp->dregs + DMA_CSR);
-	}
-	switch (esp->dma->revision) {
-	case dvmahme:
-		/* This is the HME DVMA gate array. */
-
-		sbus_writel(DMA_RESET_FAS366, esp->dregs + DMA_CSR);
-		sbus_writel(DMA_RST_SCSI, esp->dregs + DMA_CSR);
-
-		esp->prev_hme_dmacsr = (DMA_PARITY_OFF|DMA_2CLKS|DMA_SCSI_DISAB|DMA_INT_ENAB);
-		esp->prev_hme_dmacsr &= ~(DMA_ENABLE|DMA_ST_WRITE|DMA_BRST_SZ);
-
-		if (can_do_burst64)
-			esp->prev_hme_dmacsr |= DMA_BRST64;
-		else if (can_do_burst32)
-			esp->prev_hme_dmacsr |= DMA_BRST32;
-
-		if (can_do_sbus64) {
-			esp->prev_hme_dmacsr |= DMA_SCSI_SBUS64;
-			sbus_set_sbus64(esp->sdev, esp->bursts);
-		}
-
-		/* This chip is horrible. */
-		while (sbus_readl(esp->dregs + DMA_CSR) & DMA_PEND_READ)
-			udelay(1);
-
-		sbus_writel(0, esp->dregs + DMA_CSR);
-		sbus_writel(esp->prev_hme_dmacsr, esp->dregs + DMA_CSR);
-
-		/* This is necessary to avoid having the SCSI channel
-		 * engine lock up on us.
-		 */
-		sbus_writel(0, esp->dregs + DMA_ADDR);
-
-		break;
-	case dvmarev2:
-		/* This is the gate array found in the sun4m
-		 * NCR SBUS I/O subsystem.
-		 */
-		if (esp->erev != esp100) {
-			tmp = sbus_readl(esp->dregs + DMA_CSR);
-			sbus_writel(tmp | DMA_3CLKS, esp->dregs + DMA_CSR);
-		}
-		break;
-	case dvmarev3:
-		tmp = sbus_readl(esp->dregs + DMA_CSR);
-		tmp &= ~DMA_3CLKS;
-		tmp |= DMA_2CLKS;
-		if (can_do_burst32) {
-			tmp &= ~DMA_BRST_SZ;
-			tmp |= DMA_BRST32;
-		}
-		sbus_writel(tmp, esp->dregs + DMA_CSR);
-		break;
-	case dvmaesc1:
-		/* This is the DMA unit found on SCSI/Ether cards. */
-		tmp = sbus_readl(esp->dregs + DMA_CSR);
-		tmp |= DMA_ADD_ENABLE;
-		tmp &= ~DMA_BCNT_ENAB;
-		if (!can_do_burst32 && can_do_burst16) {
-			tmp |= DMA_ESC_BURST;
-		} else {
-			tmp &= ~(DMA_ESC_BURST);
-		}
-		sbus_writel(tmp, esp->dregs + DMA_CSR);
-		break;
-	default:
-		break;
-	};
-	ESP_INTSON(esp->dregs);
-}
-
-/* Reset the ESP chip, _not_ the SCSI bus. */
-static void __init esp_reset_esp(struct esp *esp)
-{
-	u8 family_code, version;
-	int i;
-
-	/* Now reset the ESP chip */
-	esp_cmd(esp, ESP_CMD_RC);
-	esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA);
-	esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA);
-
-	/* Reload the configuration registers */
-	sbus_writeb(esp->cfact, esp->eregs + ESP_CFACT);
-	esp->prev_stp = 0;
-	sbus_writeb(esp->prev_stp, esp->eregs + ESP_STP);
-	esp->prev_soff = 0;
-	sbus_writeb(esp->prev_soff, esp->eregs + ESP_SOFF);
-	sbus_writeb(esp->neg_defp, esp->eregs + ESP_TIMEO);
-
-	/* This is the only point at which it is reliable to read
-	 * the ID-code for a fast ESP chip variants.
-	 */
-	esp->max_period = ((35 * esp->ccycle) / 1000);
-	if (esp->erev == fast) {
-		version = sbus_readb(esp->eregs + ESP_UID);
-		family_code = (version & 0xf8) >> 3;
-		if (family_code == 0x02)
-			esp->erev = fas236;
-		else if (family_code == 0x0a)
-			esp->erev = fashme; /* Version is usually '5'. */
-		else
-			esp->erev = fas100a;
-		ESPMISC(("esp%d: FAST chip is %s (family=%d, version=%d)\n",
-			 esp->esp_id,
-			 (esp->erev == fas236) ? "fas236" :
-			 ((esp->erev == fas100a) ? "fas100a" :
-			  "fasHME"), family_code, (version & 7)));
-
-		esp->min_period = ((4 * esp->ccycle) / 1000);
-	} else {
-		esp->min_period = ((5 * esp->ccycle) / 1000);
-	}
-	esp->max_period = (esp->max_period + 3)>>2;
-	esp->min_period = (esp->min_period + 3)>>2;
-
-	sbus_writeb(esp->config1, esp->eregs + ESP_CFG1);
-	switch (esp->erev) {
-	case esp100:
-		/* nothing to do */
-		break;
-	case esp100a:
-		sbus_writeb(esp->config2, esp->eregs + ESP_CFG2);
-		break;
-	case esp236:
-		/* Slow 236 */
-		sbus_writeb(esp->config2, esp->eregs + ESP_CFG2);
-		esp->prev_cfg3 = esp->config3[0];
-		sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3);
-		break;
-	case fashme:
-		esp->config2 |= (ESP_CONFIG2_HME32 | ESP_CONFIG2_HMEFENAB);
-		/* fallthrough... */
-	case fas236:
-		/* Fast 236 or HME */
-		sbus_writeb(esp->config2, esp->eregs + ESP_CFG2);
-		for (i = 0; i < 16; i++) {
-			if (esp->erev == fashme) {
-				u8 cfg3;
-
-				cfg3 = ESP_CONFIG3_FCLOCK | ESP_CONFIG3_OBPUSH;
-				if (esp->scsi_id >= 8)
-					cfg3 |= ESP_CONFIG3_IDBIT3;
-				esp->config3[i] |= cfg3;
-			} else {
-				esp->config3[i] |= ESP_CONFIG3_FCLK;
-			}
-		}
-		esp->prev_cfg3 = esp->config3[0];
-		sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3);
-		if (esp->erev == fashme) {
-			esp->radelay = 80;
-		} else {
-			if (esp->diff)
-				esp->radelay = 0;
-			else
-				esp->radelay = 96;
-		}
-		break;
-	case fas100a:
-		/* Fast 100a */
-		sbus_writeb(esp->config2, esp->eregs + ESP_CFG2);
-		for (i = 0; i < 16; i++)
-			esp->config3[i] |= ESP_CONFIG3_FCLOCK;
-		esp->prev_cfg3 = esp->config3[0];
-		sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3);
-		esp->radelay = 32;
-		break;
-	default:
-		panic("esp: what could it be... I wonder...");
-		break;
-	};
-
-	/* Eat any bitrot in the chip */
-	sbus_readb(esp->eregs + ESP_INTRPT);
-	udelay(100);
-}
-
-/* This places the ESP into a known state at boot time. */
-static void __init esp_bootup_reset(struct esp *esp)
-{
-	u8 tmp;
-
-	/* Reset the DMA */
-	esp_reset_dma(esp);
-
-	/* Reset the ESP */
-	esp_reset_esp(esp);
-
-	/* Reset the SCSI bus, but tell ESP not to generate an irq */
-	tmp = sbus_readb(esp->eregs + ESP_CFG1);
-	tmp |= ESP_CONFIG1_SRRDISAB;
-	sbus_writeb(tmp, esp->eregs + ESP_CFG1);
-
-	esp_cmd(esp, ESP_CMD_RS);
-	udelay(400);
-
-	sbus_writeb(esp->config1, esp->eregs + ESP_CFG1);
-
-	/* Eat any bitrot in the chip and we are done... */
-	sbus_readb(esp->eregs + ESP_INTRPT);
-}
-
-static int __init esp_find_dvma(struct esp *esp, struct sbus_dev *dma_sdev)
-{
-	struct sbus_dev *sdev = esp->sdev;
-	struct sbus_dma *dma;
-
-	if (dma_sdev != NULL) {
-		for_each_dvma(dma) {
-			if (dma->sdev == dma_sdev)
-				break;
-		}
-	} else {
-		for_each_dvma(dma) {
-			/* If allocated already, can't use it. */
-			if (dma->allocated)
-				continue;
-
-			if (dma->sdev == NULL)
-				break;
-
-			/* If bus + slot are the same and it has the
-			 * correct OBP name, it's ours.
-			 */
-			if (sdev->bus == dma->sdev->bus &&
-			    sdev->slot == dma->sdev->slot &&
-			    (!strcmp(dma->sdev->prom_name, "dma") ||
-			     !strcmp(dma->sdev->prom_name, "espdma")))
-				break;
-		}
-	}
-
-	/* If we don't know how to handle the dvma,
-	 * do not use this device.
-	 */
-	if (dma == NULL) {
-		printk("Cannot find dvma for ESP%d's SCSI\n", esp->esp_id);
-		return -1;
-	}
-	if (dma->allocated) {
-		printk("esp%d: can't use my espdma\n", esp->esp_id);
-		return -1;
-	}
-	dma->allocated = 1;
-	esp->dma = dma;
-	esp->dregs = dma->regs;
-
-	return 0;
-}
-
-static int __init esp_map_regs(struct esp *esp, int hme)
-{
-	struct sbus_dev *sdev = esp->sdev;
-	struct resource *res;
-
-	/* On HME, two reg sets exist, first is DVMA,
-	 * second is ESP registers.
-	 */
-	if (hme)
-		res = &sdev->resource[1];
-	else
-		res = &sdev->resource[0];
-
-	esp->eregs = sbus_ioremap(res, 0, ESP_REG_SIZE, "ESP Registers");
-
-	if (esp->eregs == 0)
-		return -1;
-	return 0;
-}
-
-static int __init esp_map_cmdarea(struct esp *esp)
-{
-	struct sbus_dev *sdev = esp->sdev;
-
-	esp->esp_command = sbus_alloc_consistent(sdev, 16,
-						 &esp->esp_command_dvma);
-	if (esp->esp_command == NULL ||
-	    esp->esp_command_dvma == 0)
-		return -1;
-	return 0;
-}
-
-static int __init esp_register_irq(struct esp *esp)
-{
-	esp->ehost->irq = esp->irq = esp->sdev->irqs[0];
-
-	/* We used to try various overly-clever things to
-	 * reduce the interrupt processing overhead on
-	 * sun4c/sun4m when multiple ESP's shared the
-	 * same IRQ.  It was too complex and messy to
-	 * sanely maintain.
-	 */
-	if (request_irq(esp->ehost->irq, esp_intr,
-			IRQF_SHARED, "ESP SCSI", esp)) {
-		printk("esp%d: Cannot acquire irq line\n",
-		       esp->esp_id);
-		return -1;
-	}
-
-	printk("esp%d: IRQ %d ", esp->esp_id,
-	       esp->ehost->irq);
-
-	return 0;
-}
-
-static void __init esp_get_scsi_id(struct esp *esp)
-{
-	struct sbus_dev *sdev = esp->sdev;
-	struct device_node *dp = sdev->ofdev.node;
-
-	esp->scsi_id = of_getintprop_default(dp,
-					     "initiator-id",
-					     -1);
-	if (esp->scsi_id == -1)
-		esp->scsi_id = of_getintprop_default(dp,
-						     "scsi-initiator-id",
-						     -1);
-	if (esp->scsi_id == -1)
-		esp->scsi_id = (sdev->bus == NULL) ? 7 :
-			of_getintprop_default(sdev->bus->ofdev.node,
-					      "scsi-initiator-id",
-					      7);
-	esp->ehost->this_id = esp->scsi_id;
-	esp->scsi_id_mask = (1 << esp->scsi_id);
-
-}
-
-static void __init esp_get_clock_params(struct esp *esp)
-{
-	struct sbus_dev *sdev = esp->sdev;
-	int prom_node = esp->prom_node;
-	int sbus_prom_node;
-	unsigned int fmhz;
-	u8 ccf;
-
-	if (sdev != NULL && sdev->bus != NULL)
-		sbus_prom_node = sdev->bus->prom_node;
-	else
-		sbus_prom_node = 0;
-
-	/* This is getting messy but it has to be done
-	 * correctly or else you get weird behavior all
-	 * over the place.  We are trying to basically
-	 * figure out three pieces of information.
-	 *
-	 * a) Clock Conversion Factor
-	 *
-	 *    This is a representation of the input
-	 *    crystal clock frequency going into the
-	 *    ESP on this machine.  Any operation whose
-	 *    timing is longer than 400ns depends on this
-	 *    value being correct.  For example, you'll
-	 *    get blips for arbitration/selection during
-	 *    high load or with multiple targets if this
-	 *    is not set correctly.
-	 *
-	 * b) Selection Time-Out
-	 *
-	 *    The ESP isn't very bright and will arbitrate
-	 *    for the bus and try to select a target
-	 *    forever if you let it.  This value tells
-	 *    the ESP when it has taken too long to
-	 *    negotiate and that it should interrupt
-	 *    the CPU so we can see what happened.
-	 *    The value is computed as follows (from
-	 *    NCR/Symbios chip docs).
-	 *
-	 *          (Time Out Period) *  (Input Clock)
-	 *    STO = ----------------------------------
-	 *          (8192) * (Clock Conversion Factor)
-	 *
-	 *    You usually want the time out period to be
-	 *    around 250ms, I think we'll set it a little
-	 *    bit higher to account for fully loaded SCSI
-	 *    bus's and slow devices that don't respond so
-	 *    quickly to selection attempts. (yeah, I know
-	 *    this is out of spec. but there is a lot of
-	 *    buggy pieces of firmware out there so bite me)
-	 *
-	 * c) Imperical constants for synchronous offset
-	 *    and transfer period register values
-	 *
-	 *    This entails the smallest and largest sync
-	 *    period we could ever handle on this ESP.
-	 */
-
-	fmhz = prom_getintdefault(prom_node, "clock-frequency", -1);
-	if (fmhz == -1)
-		fmhz = (!sbus_prom_node) ? 0 :
-			prom_getintdefault(sbus_prom_node, "clock-frequency", -1);
-
-	if (fmhz <= (5000000))
-		ccf = 0;
-	else
-		ccf = (((5000000 - 1) + (fmhz))/(5000000));
-
-	if (!ccf || ccf > 8) {
-		/* If we can't find anything reasonable,
-		 * just assume 20MHZ.  This is the clock
-		 * frequency of the older sun4c's where I've
-		 * been unable to find the clock-frequency
-		 * PROM property.  All other machines provide
-		 * useful values it seems.
-		 */
-		ccf = ESP_CCF_F4;
-		fmhz = (20000000);
-	}
-
-	if (ccf == (ESP_CCF_F7 + 1))
-		esp->cfact = ESP_CCF_F0;
-	else if (ccf == ESP_CCF_NEVER)
-		esp->cfact = ESP_CCF_F2;
-	else
-		esp->cfact = ccf;
-	esp->raw_cfact = ccf;
-
-	esp->cfreq = fmhz;
-	esp->ccycle = ESP_MHZ_TO_CYCLE(fmhz);
-	esp->ctick = ESP_TICK(ccf, esp->ccycle);
-	esp->neg_defp = ESP_NEG_DEFP(fmhz, ccf);
-	esp->sync_defp = SYNC_DEFP_SLOW;
-
-	printk("SCSI ID %d Clk %dMHz CCYC=%d CCF=%d TOut %d ",
-	       esp->scsi_id, (fmhz / 1000000),
-	       (int)esp->ccycle, (int)ccf, (int) esp->neg_defp);
-}
-
-static void __init esp_get_bursts(struct esp *esp, struct sbus_dev *dma)
-{
-	struct sbus_dev *sdev = esp->sdev;
-	u8 bursts;
-
-	bursts = prom_getintdefault(esp->prom_node, "burst-sizes", 0xff);
-
-	if (dma) {
-		u8 tmp = prom_getintdefault(dma->prom_node,
-					    "burst-sizes", 0xff);
-		if (tmp != 0xff)
-			bursts &= tmp;
-	}
-
-	if (sdev->bus) {
-		u8 tmp = prom_getintdefault(sdev->bus->prom_node,
-					    "burst-sizes", 0xff);
-		if (tmp != 0xff)
-			bursts &= tmp;
-	}
-
-	if (bursts == 0xff ||
-	    (bursts & DMA_BURST16) == 0 ||
-	    (bursts & DMA_BURST32) == 0)
-		bursts = (DMA_BURST32 - 1);
-
-	esp->bursts = bursts;
-}
-
-static void __init esp_get_revision(struct esp *esp)
-{
-	u8 tmp;
-
-	esp->config1 = (ESP_CONFIG1_PENABLE | (esp->scsi_id & 7));
-	esp->config2 = (ESP_CONFIG2_SCSI2ENAB | ESP_CONFIG2_REGPARITY);
-	sbus_writeb(esp->config2, esp->eregs + ESP_CFG2);
-
-	tmp = sbus_readb(esp->eregs + ESP_CFG2);
-	tmp &= ~ESP_CONFIG2_MAGIC;
-	if (tmp != (ESP_CONFIG2_SCSI2ENAB | ESP_CONFIG2_REGPARITY)) {
-		/* If what we write to cfg2 does not come back, cfg2
-		 * is not implemented, therefore this must be a plain
-		 * esp100.
-		 */
-		esp->erev = esp100;
-		printk("NCR53C90(esp100)\n");
-	} else {
-		esp->config2 = 0;
-		esp->prev_cfg3 = esp->config3[0] = 5;
-		sbus_writeb(esp->config2, esp->eregs + ESP_CFG2);
-		sbus_writeb(0, esp->eregs + ESP_CFG3);
-		sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3);
-
-		tmp = sbus_readb(esp->eregs + ESP_CFG3);
-		if (tmp != 5) {
-			/* The cfg2 register is implemented, however
-			 * cfg3 is not, must be esp100a.
-			 */
-			esp->erev = esp100a;
-			printk("NCR53C90A(esp100a)\n");
-		} else {
-			int target;
-
-			for (target = 0; target < 16; target++)
-				esp->config3[target] = 0;
-			esp->prev_cfg3 = 0;
-			sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3);
-
-			/* All of cfg{1,2,3} implemented, must be one of
-			 * the fas variants, figure out which one.
-			 */
-			if (esp->raw_cfact > ESP_CCF_F5) {
-				esp->erev = fast;
-				esp->sync_defp = SYNC_DEFP_FAST;
-				printk("NCR53C9XF(espfast)\n");
-			} else {
-				esp->erev = esp