[SCSI] mca_53c9x: remove driver

This driver depends on the deprecated NCR53C9X core and needs to be converted
to the esp_scsi core.

Acked-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/Kconfig

@@ -1263,17 +1263,6 @@ config SCSI_NCR53C8XX_NO_DISCONNECT
 	  not allow targets to disconnect is not reasonable if there is more
 	  than 1 device on a SCSI bus. The normal answer therefore is N.
 
-config SCSI_MCA_53C9X
-	tristate "NCR MCA 53C9x SCSI support"
-	depends on MCA_LEGACY && SCSI && BROKEN_ON_SMP
-	help
-	  Some MicroChannel machines, notably the NCR 35xx line, use a SCSI
-	  controller based on the NCR 53C94.  This driver will allow use of
-	  the controller on the 3550, and very possibly others.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called mca_53c9x.
-
 config SCSI_PAS16
 	tristate "PAS16 SCSI support"
 	depends on ISA && SCSI

drivers/scsi/Makefile

@@ -95,7 +95,6 @@ obj-$(CONFIG_SCSI_SYM53C8XX_2)	+= sym53c8xx_2/
 obj-$(CONFIG_SCSI_ZALON)	+= zalon7xx.o
 obj-$(CONFIG_SCSI_EATA_PIO)	+= eata_pio.o
 obj-$(CONFIG_SCSI_7000FASST)	+= wd7000.o
-obj-$(CONFIG_SCSI_MCA_53C9X)	+= NCR53C9x.o	mca_53c9x.o
 obj-$(CONFIG_SCSI_IBMMCA)	+= ibmmca.o
 obj-$(CONFIG_SCSI_EATA)		+= eata.o
 obj-$(CONFIG_SCSI_DC395x)	+= dc395x.o

drivers/scsi/mca_53c9x.c

@@ -1,520 +0,0 @@
-/* mca_53c9x.c: Driver for the SCSI adapter found on NCR 35xx
- *  (and maybe some other) Microchannel machines
- *
- * Code taken mostly from Cyberstorm SCSI drivers
- *   Copyright (C) 1996 Jesper Skov (jskov@cygnus.co.uk)
- *
- * Hacked to work with the NCR MCA stuff by Tymm Twillman (tymm@computer.org)
- *
- * The CyberStorm SCSI driver (and this driver) is based on David S. Miller's
- *   ESP driver  * for the Sparc computers. 
- * 
- * Special thanks to Ken Stewart at Symbios (LSI) for helping with info on
- *  the 86C01.  I was on the brink of going ga-ga...
- *
- * Also thanks to Jesper Skov for helping me with info on how the Amiga
- *  does things...
- */
-
-/*
- * This is currently only set up to use one 53c9x card at a time; it could be 
- *  changed fairly easily to detect/use more than one, but I'm not too sure how
- *  many cards that use the 53c9x on MCA systems there are (if, in fact, there
- *  are cards that use them, other than the one built into some NCR systems)...
- *  If anyone requests this, I'll throw it in, otherwise it's not worth the
- *  effort.
- */
-
-/*
- * Info on the 86C01 MCA interface chip at the bottom, if you care enough to
- *  look.
- */
-
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/mca.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/mca-legacy.h>
-
-#include "scsi.h"
-#include <scsi/scsi_host.h>
-#include "NCR53C9x.h"
-
-#include <asm/dma.h>
-#include <asm/irq.h>
-#include <asm/mca_dma.h>
-#include <asm/pgtable.h>
-
-/*
- * From ibmmca.c (IBM scsi controller card driver) -- used for turning PS2 disk
- *  activity LED on and off
- */
-
-#define PS2_SYS_CTR	0x92
-
-/* Ports the ncr's 53c94 can be put at; indexed by pos register value */
-
-#define MCA_53C9X_IO_PORTS {                             \
-                         0x0000, 0x0240, 0x0340, 0x0400, \
-	                 0x0420, 0x3240, 0x8240, 0xA240, \
-	                }
-			
-/*
- * Supposedly there were some cards put together with the 'c9x and 86c01.  If
- *   they have different ID's from the ones on the 3500 series machines, 
- *   you can add them here and hopefully things will work out.
- */
-			
-#define MCA_53C9X_IDS {          \
-                         0x7F4C, \
-			 0x0000, \
-                        }
-
-static int  dma_bytes_sent(struct NCR_ESP *, int);
-static int  dma_can_transfer(struct NCR_ESP *, Scsi_Cmnd *);
-static void dma_dump_state(struct NCR_ESP *);
-static void dma_init_read(struct NCR_ESP *, __u32, int);
-static void dma_init_write(struct NCR_ESP *, __u32, int);
-static void dma_ints_off(struct NCR_ESP *);
-static void dma_ints_on(struct NCR_ESP *);
-static int  dma_irq_p(struct NCR_ESP *);
-static int  dma_ports_p(struct NCR_ESP *);
-static void dma_setup(struct NCR_ESP *, __u32, int, int);
-static void dma_led_on(struct NCR_ESP *);
-static void dma_led_off(struct NCR_ESP *);
-
-/* This is where all commands are put before they are trasfered to the 
- *  53c9x via PIO.
- */
-
-static volatile unsigned char cmd_buffer[16];
-
-/*
- * We keep the structure that is used to access the registers on the 53c9x
- *  here.
- */
-
-static struct ESP_regs eregs;
-
-/***************************************************************** Detection */
-static int mca_esp_detect(struct scsi_host_template *tpnt)
-{
-	struct NCR_ESP *esp;
-	static int io_port_by_pos[] = MCA_53C9X_IO_PORTS;
-	int mca_53c9x_ids[] = MCA_53C9X_IDS;
-	int *id_to_check = mca_53c9x_ids;
-	int slot;
-	int pos[3];
-	unsigned int tmp_io_addr;
-	unsigned char tmp_byte;
-
-
-	if (!MCA_bus)
-		return 0;
-
-	while (*id_to_check) { 
-		if ((slot = mca_find_adapter(*id_to_check, 0)) !=
-		  MCA_NOTFOUND) 
-		{
-			esp = esp_allocate(tpnt, NULL, 0);
-
-			pos[0] = mca_read_stored_pos(slot, 2);
-			pos[1] = mca_read_stored_pos(slot, 3);
-			pos[2] = mca_read_stored_pos(slot, 4);
-
-			esp->eregs = &eregs;
-
-			/*
-			 * IO port base is given in the first (non-ID) pos
-			 *  register, like so:
-			 *
-			 *  Bits 3  2  1       IO base
-			 * ----------------------------
-			 *       0  0  0       <disabled>
-			 *       0  0  1       0x0240
-			 *       0  1  0       0x0340
-			 *       0  1  1       0x0400
-			 *       1  0  0       0x0420
-			 *       1  0  1       0x3240
-			 *       1  1  0       0x8240
-			 *       1  1  1       0xA240
-			 */
-
-			tmp_io_addr =
-			  io_port_by_pos[(pos[0] & 0x0E) >> 1];
-
-			esp->eregs->io_addr = tmp_io_addr + 0x10;
-
-      			if (esp->eregs->io_addr == 0x0000) { 
-        			printk("Adapter is disabled.\n");
-				break;
-			}
-
-			/*
-			 * IRQ is specified in bits 4 and 5:
-			 *
-			 *  Bits  4  5        IRQ
-			 * -----------------------
-			 *        0  0         3
-			 *        0  1         5
-			 *        1  0         7
-			 *        1  1         9
-			 */
-
-      			esp->irq = ((pos[0] & 0x30) >> 3) + 3;
-
-			/*
-			 * DMA channel is in the low 3 bits of the second
-			 *  POS register
-			 */
-
-			esp->dma = pos[1] & 7;
-			esp->slot = slot;
-
-			if (request_irq(esp->irq, esp_intr, 0,
-			 "NCR 53c9x SCSI", esp->ehost))
-			{
-				printk("Unable to request IRQ %d.\n", esp->irq);
-				esp_deallocate(esp);
-				scsi_unregister(esp->ehost);
-				return 0;
-			}
-
- 			if (request_dma(esp->dma, "NCR 53c9x SCSI")) {
-				printk("Unable to request DMA channel %d.\n",
-				 esp->dma);
-				free_irq(esp->irq, esp_intr);
-				esp_deallocate(esp);
-				scsi_unregister(esp->ehost);
-				return 0;
-			}
-
-			request_region(tmp_io_addr, 32, "NCR 53c9x SCSI");
-
-			/*
-			 * 86C01 handles DMA, IO mode, from address
-			 *  (base + 0x0a)
-			 */
-
-			mca_disable_dma(esp->dma);
-			mca_set_dma_io(esp->dma, tmp_io_addr + 0x0a);
-			mca_enable_dma(esp->dma);
- 
-			/* Tell the 86C01 to give us interrupts */
-
-			tmp_byte = inb(tmp_io_addr + 0x02) | 0x40;
-			outb(tmp_byte, tmp_io_addr + 0x02); 
-
-			/*
-			 * Scsi ID -- general purpose register, hi
-			 *  2 bits; add 4 to this number to get the
-			 *  ID
-			 */
-
-			esp->scsi_id = ((pos[2] & 0xC0) >> 6) + 4;
-
-			/* Do command transfer with programmed I/O */
-
-			esp->do_pio_cmds = 1;
-
-			/* Required functions */
-
-			esp->dma_bytes_sent = &dma_bytes_sent;
-			esp->dma_can_transfer = &dma_can_transfer;
-			esp->dma_dump_state = &dma_dump_state;
-			esp->dma_init_read = &dma_init_read;
-			esp->dma_init_write = &dma_init_write;
-			esp->dma_ints_off = &dma_ints_off;
-			esp->dma_ints_on = &dma_ints_on;
-			esp->dma_irq_p = &dma_irq_p;
-			esp->dma_ports_p = &dma_ports_p;
-			esp->dma_setup = &dma_setup;
-
-			/* Optional functions */
-
-			esp->dma_barrier = NULL;
-			esp->dma_drain = NULL;
-			esp->dma_invalidate = NULL;
-			esp->dma_irq_entry = NULL;
-			esp->dma_irq_exit = NULL;
-			esp->dma_led_on = dma_led_on;
-			esp->dma_led_off = dma_led_off;
-			esp->dma_poll = NULL;
-			esp->dma_reset = NULL;
-
-			/* Set the command buffer */
-
-			esp->esp_command = (volatile unsigned char*)
-			  cmd_buffer;
-	 		esp->esp_command_dvma = isa_virt_to_bus(cmd_buffer);
-
-			/* SCSI chip speed */
-
-			esp->cfreq = 25000000;
-
-			/* Differential SCSI? I think not. */
-
-			esp->diff = 0;
-
-			esp_initialize(esp);
-
-      			printk(" Adapter found in slot %2d: io port 0x%x "
-			  "irq %d dma channel %d\n", slot + 1, tmp_io_addr,
-			   esp->irq, esp->dma);
-
-			mca_set_adapter_name(slot, "NCR 53C9X SCSI Adapter");
-			mca_mark_as_used(slot);
-
-			break;
-		}
-    
-		id_to_check++;
-	}
-
-	return esps_in_use;
-}
-
-
-/******************************************************************* Release */
-
-static int mca_esp_release(struct Scsi_Host *host)
-{
-	struct NCR_ESP *esp = (struct NCR_ESP *)host->hostdata;
-	unsigned char tmp_byte;
-
-	esp_deallocate(esp);
-	/*
-	 * Tell the 86C01 to stop sending interrupts
-	 */
-
-	tmp_byte = inb(esp->eregs->io_addr - 0x0E);
-	tmp_byte &= ~0x40;
-	outb(tmp_byte, esp->eregs->io_addr - 0x0E);
-
-	free_irq(esp->irq, esp_intr);
-	free_dma(esp->dma);
-
-	mca_mark_as_unused(esp->slot);
-
-	return 0;
-}
-
-/************************************************************* DMA Functions */
-static int dma_bytes_sent(struct NCR_ESP *esp, int fifo_count)
-{
-	/* Ask the 53c9x.  It knows. */
-
-	return fifo_count;
-}
-
-static int dma_can_transfer(struct NCR_ESP *esp, Scsi_Cmnd *sp)
-{
-	/* 
-	 * The MCA dma channels can only do up to 128K bytes at a time.
-         *  (16 bit mode)
-	 */
-
-	unsigned long sz = sp->SCp.this_residual;
-	if(sz > 0x20000)
-		sz = 0x20000;
-	return sz;
-}
-
-static void dma_dump_state(struct NCR_ESP *esp)
-{
-	/*
-	 * Doesn't quite match up to the other drivers, but we do what we
-	 *  can.
-	 */
-
-	ESPLOG(("esp%d: dma channel <%d>\n", esp->esp_id, esp->dma));
-	ESPLOG(("bytes left to dma: %d\n", mca_get_dma_residue(esp->dma)));
-}
-
-static void dma_init_read(struct NCR_ESP *esp, __u32 addr, int length)
-{
-	unsigned long flags;
-
-
-	save_flags(flags);
-	cli();
-
-	mca_disable_dma(esp->dma);
-	mca_set_dma_mode(esp->dma, MCA_DMA_MODE_XFER | MCA_DMA_MODE_16 |
-	  MCA_DMA_MODE_IO);
-	mca_set_dma_addr(esp->dma, addr);
-	mca_set_dma_count(esp->dma, length / 2); /* !!! */
-	mca_enable_dma(esp->dma);
-
-	restore_flags(flags);
-}
-
-static void dma_init_write(struct NCR_ESP *esp, __u32 addr, int length)
-{
-	unsigned long flags;
-
-
-	save_flags(flags);
-	cli();
-
-	mca_disable_dma(esp->dma);
-	mca_set_dma_mode(esp->dma, MCA_DMA_MODE_XFER | MCA_DMA_MODE_WRITE |
-	  MCA_DMA_MODE_16 | MCA_DMA_MODE_IO);
-	mca_set_dma_addr(esp->dma, addr);
-	mca_set_dma_count(esp->dma, length / 2); /* !!! */
-	mca_enable_dma(esp->dma);
-
-	restore_flags(flags);
-}
-
-static void dma_ints_off(struct NCR_ESP *esp)
-{
-	/*
-	 * Tell the 'C01 to shut up.  All interrupts are routed through it.
-	 */
-
-	outb(inb(esp->eregs->io_addr - 0x0E) & ~0x40,
-	 esp->eregs->io_addr - 0x0E);
-}
-
-static void dma_ints_on(struct NCR_ESP *esp)
-{
-	/*
-	 * Ok.  You can speak again.
-	 */
-
-	outb(inb(esp->eregs->io_addr - 0x0E) | 0x40,
-	 esp->eregs->io_addr - 0x0E);
-}
-
-static int dma_irq_p(struct NCR_ESP *esp)
-{
-	/*
-	 * DaveM says that this should return a "yes" if there is an interrupt
-	 *  or a DMA error occurred.  I copied the Amiga driver's semantics,
-	 *  though, because it seems to work and we can't really tell if
-	 *  a DMA error happened.  This gives the "yes" if the scsi chip
-	 *  is sending an interrupt and no DMA activity is taking place
-	 */
-
-	return (!(inb(esp->eregs->io_addr - 0x04) & 1) &&
-	 !(inb(esp->eregs->io_addr - 0x04) & 2) ); 
-}
-
-static int dma_ports_p(struct NCR_ESP *esp)
-{
-	/*
-	 * Check to see if interrupts are enabled on the 'C01 (in case abort
-	 *  is entered multiple times, so we only do the abort once)
-	 */
-
-	return (inb(esp->eregs->io_addr - 0x0E) & 0x40) ? 1:0;
-}
-
-static void dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write)
-{
-	if(write){
-		dma_init_write(esp, addr, count);
-	} else {
-		dma_init_read(esp, addr, count);
-	}
-}
-
-/*
- * These will not play nicely with other disk controllers that try to use the
- *  disk active LED... but what can you do?  Don't answer that.
- *
- * Stolen shamelessly from ibmmca.c -- IBM Microchannel SCSI adapter driver
- *
- */
-
-static void dma_led_on(struct NCR_ESP *esp)
-{
-	outb(inb(PS2_SYS_CTR) | 0xc0, PS2_SYS_CTR);
-}
-
-static void dma_led_off(struct NCR_ESP *esp)
-{
-	outb(inb(PS2_SYS_CTR) & 0x3f, PS2_SYS_CTR);
-}
-
-static struct scsi_host_template driver_template = {
-	.proc_name		= "mca_53c9x",
-	.name			= "NCR 53c9x SCSI",
-	.detect			= mca_esp_detect,
-	.slave_alloc		= esp_slave_alloc,
-	.slave_destroy		= esp_slave_destroy,
-	.release		= mca_esp_release,
-	.queuecommand		= esp_queue,
-	.eh_abort_handler	= esp_abort,
-	.eh_bus_reset_handler	= esp_reset,
-	.can_queue		= 7,
-	.sg_tablesize		= SG_ALL,
-	.cmd_per_lun		= 1,
-	.unchecked_isa_dma	= 1,
-	.use_clustering		= DISABLE_CLUSTERING
-};
-
-
-#include "scsi_module.c"
-
-/*
- * OK, here's the goods I promised.  The NCR 86C01 is an MCA interface chip 
- *  that handles enabling/diabling IRQ, dma interfacing, IO port selection
- *  and other fun stuff.  It takes up 16 addresses, and the chip it is
- *  connnected to gets the following 16.  Registers are as follows:
- *
- * Offsets 0-1 : Card ID
- *
- * Offset    2 : Mode enable register --
- *                Bit    7 : Data Word width (1 = 16, 0 = 8)
- *		  Bit    6 : IRQ enable (1 = enabled)
- *                Bits 5,4 : IRQ select
- *                              0  0 : IRQ 3
- *			        0  1 : IRQ 5
- * 				1  0 : IRQ 7
- *  				1  1 : IRQ 9
- *                Bits 3-1 : Base Address
- *                           0  0  0 : <disabled>
- * 			     0  0  1 : 0x0240
- *    			     0  1  0 : 0x0340
- *     			     0  1  1 : 0x0400
- * 			     1  0  0 : 0x0420
- * 			     1  0  1 : 0x3240
- * 			     1  1  0 : 0x8240
- * 			     1  1  1 : 0xA240
- *		  Bit    0 : Card enable (1 = enabled)
- *
- * Offset    3 : DMA control register --
- *                Bit    7 : DMA enable (1 = enabled)
- *                Bits 6,5 : Preemt Count Select (transfers to complete after
- *                            'C01 has been preempted on MCA bus)
- *                              0  0 : 0
- *                              0  1 : 1
- *                              1  0 : 3
- *                              1  1 : 7
- *  (all these wacky numbers; I'm sure there's a reason somewhere)
- *                Bit    4 : Fairness enable (1 = fair bus priority)
- *                Bits 3-0 : Arbitration level (0-15 consecutive)
- * 
- * Offset    4 : General purpose register
- *                Bits 7-3 : User definable (here, 7,6 are SCSI ID)
- *                Bits 2-0 : reserved
- *
- * Offset   10 : DMA decode register (used for IO based DMA; also can do
- *                PIO through this port)
- *
- * Offset   12 : Status
- *                Bits 7-2 : reserved
- *                Bit    1 : DMA pending (1 = pending)
- *                Bit    0 : IRQ pending (0 = pending)
- *
- * Exciting, huh?  
- *
- */