Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 387 insertions, 0 deletions

diff --git a/drivers/scsi/gvp11.c b/drivers/scsi/gvp11.c
new file mode 100644
index 000000000000..30cbf73c7433
--- /dev/null
+++ b/drivers/scsi/gvp11.c
@@ -0,0 +1,387 @@
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/blkdev.h>
+#include <linux/sched.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+
+#include <asm/setup.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/amigaints.h>
+#include <asm/amigahw.h>
+#include <linux/zorro.h>
+#include <asm/irq.h>
+#include <linux/spinlock.h>
+
+#include "scsi.h"
+#include <scsi/scsi_host.h>
+#include "wd33c93.h"
+#include "gvp11.h"
+
+#include<linux/stat.h>
+
+#define DMA(ptr) ((gvp11_scsiregs *)((ptr)->base))
+#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
+
+static irqreturn_t gvp11_intr (int irq, void *_instance, struct pt_regs *fp)
+{
+    unsigned long flags;
+    unsigned int status;
+    struct Scsi_Host *instance = (struct Scsi_Host *)_instance;
+
+    status = DMA(instance)->CNTR;
+    if (!(status & GVP11_DMAC_INT_PENDING))
+	return IRQ_NONE;
+
+    spin_lock_irqsave(instance->host_lock, flags);
+    wd33c93_intr(instance);
+    spin_unlock_irqrestore(instance->host_lock, flags);
+    return IRQ_HANDLED;
+}
+
+static int gvp11_xfer_mask = 0;
+
+void gvp11_setup (char *str, int *ints)
+{
+    gvp11_xfer_mask = ints[1];
+}
+
+static int dma_setup (Scsi_Cmnd *cmd, int dir_in)
+{
+    unsigned short cntr = GVP11_DMAC_INT_ENABLE;
+    unsigned long addr = virt_to_bus(cmd->SCp.ptr);
+    int bank_mask;
+    static int scsi_alloc_out_of_range = 0;
+
+    /* use bounce buffer if the physical address is bad */
+    if (addr & HDATA(cmd->device->host)->dma_xfer_mask ||
+	(!dir_in && mm_end_of_chunk (addr, cmd->SCp.this_residual)))
+    {
+	HDATA(cmd->device->host)->dma_bounce_len = (cmd->SCp.this_residual + 511)
+	    & ~0x1ff;
+
+ 	if( !scsi_alloc_out_of_range ) {
+	    HDATA(cmd->device->host)->dma_bounce_buffer =
+		kmalloc (HDATA(cmd->device->host)->dma_bounce_len, GFP_KERNEL);
+	    HDATA(cmd->device->host)->dma_buffer_pool = BUF_SCSI_ALLOCED;
+	}
+
+	if (scsi_alloc_out_of_range ||
+	    !HDATA(cmd->device->host)->dma_bounce_buffer) {
+	    HDATA(cmd->device->host)->dma_bounce_buffer =
+		amiga_chip_alloc(HDATA(cmd->device->host)->dma_bounce_len,
+				       "GVP II SCSI Bounce Buffer");
+
+	    if(!HDATA(cmd->device->host)->dma_bounce_buffer)
+	    {
+		HDATA(cmd->device->host)->dma_bounce_len = 0;
+		return 1;
+	    }
+
+	    HDATA(cmd->device->host)->dma_buffer_pool = BUF_CHIP_ALLOCED;
+	}
+
+	/* check if the address of the bounce buffer is OK */
+	addr = virt_to_bus(HDATA(cmd->device->host)->dma_bounce_buffer);
+
+	if (addr & HDATA(cmd->device->host)->dma_xfer_mask) {
+	    /* fall back to Chip RAM if address out of range */
+	    if( HDATA(cmd->device->host)->dma_buffer_pool == BUF_SCSI_ALLOCED) {
+		kfree (HDATA(cmd->device->host)->dma_bounce_buffer);
+		scsi_alloc_out_of_range = 1;
+	    } else {
+		amiga_chip_free (HDATA(cmd->device->host)->dma_bounce_buffer);
+            }
+		
+	    HDATA(cmd->device->host)->dma_bounce_buffer =
+		amiga_chip_alloc(HDATA(cmd->device->host)->dma_bounce_len,
+				       "GVP II SCSI Bounce Buffer");
+
+	    if(!HDATA(cmd->device->host)->dma_bounce_buffer)
+	    {
+		HDATA(cmd->device->host)->dma_bounce_len = 0;
+		return 1;
+	    }
+
+	    addr = virt_to_bus(HDATA(cmd->device->host)->dma_bounce_buffer);
+	    HDATA(cmd->device->host)->dma_buffer_pool = BUF_CHIP_ALLOCED;
+	}
+	    
+	if (!dir_in) {
+	    /* copy to bounce buffer for a write */
+	    memcpy (HDATA(cmd->device->host)->dma_bounce_buffer,
+		    cmd->SCp.ptr, cmd->SCp.this_residual);
+	}
+    }
+
+    /* setup dma direction */
+    if (!dir_in)
+	cntr |= GVP11_DMAC_DIR_WRITE;
+
+    HDATA(cmd->device->host)->dma_dir = dir_in;
+    DMA(cmd->device->host)->CNTR = cntr;
+
+    /* setup DMA *physical* address */
+    DMA(cmd->device->host)->ACR = addr;
+
+    if (dir_in)
+	/* invalidate any cache */
+	cache_clear (addr, cmd->SCp.this_residual);
+    else
+	/* push any dirty cache */
+	cache_push (addr, cmd->SCp.this_residual);
+
+    if ((bank_mask = (~HDATA(cmd->device->host)->dma_xfer_mask >> 18) & 0x01c0))
+	    DMA(cmd->device->host)->BANK = bank_mask & (addr >> 18);
+
+    /* start DMA */
+    DMA(cmd->device->host)->ST_DMA = 1;
+
+    /* return success */
+    return 0;
+}
+
+static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt,
+		      int status)
+{
+    /* stop DMA */
+    DMA(instance)->SP_DMA = 1;
+    /* remove write bit from CONTROL bits */
+    DMA(instance)->CNTR = GVP11_DMAC_INT_ENABLE;
+
+    /* copy from a bounce buffer, if necessary */
+    if (status && HDATA(instance)->dma_bounce_buffer) {
+	if (HDATA(instance)->dma_dir && SCpnt)
+	    memcpy (SCpnt->SCp.ptr, 
+		    HDATA(instance)->dma_bounce_buffer,
+		    SCpnt->SCp.this_residual);
+	
+	if (HDATA(instance)->dma_buffer_pool == BUF_SCSI_ALLOCED)
+	    kfree (HDATA(instance)->dma_bounce_buffer);
+	else
+	    amiga_chip_free(HDATA(instance)->dma_bounce_buffer);
+	
+	HDATA(instance)->dma_bounce_buffer = NULL;
+	HDATA(instance)->dma_bounce_len = 0;
+    }
+}
+
+#define CHECK_WD33C93
+
+int __init gvp11_detect(Scsi_Host_Template *tpnt)
+{
+    static unsigned char called = 0;
+    struct Scsi_Host *instance;
+    unsigned long address;
+    unsigned int epc;
+    struct zorro_dev *z = NULL;
+    unsigned int default_dma_xfer_mask;
+    wd33c93_regs regs;
+    int num_gvp11 = 0;
+#ifdef CHECK_WD33C93
+    volatile unsigned char *sasr_3393, *scmd_3393;
+    unsigned char save_sasr;
+    unsigned char q, qq;
+#endif
+
+    if (!MACH_IS_AMIGA || called)
+	return 0;
+    called = 1;
+
+    tpnt->proc_name = "GVP11";
+    tpnt->proc_info = &wd33c93_proc_info;
+
+    while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
+	/* 
+	 * This should (hopefully) be the correct way to identify
+	 * all the different GVP SCSI controllers (except for the
+	 * SERIES I though).
+	 */
+
+	if (z->id == ZORRO_PROD_GVP_COMBO_030_R3_SCSI ||
+	    z->id == ZORRO_PROD_GVP_SERIES_II)
+	    default_dma_xfer_mask = ~0x00ffffff;
+	else if (z->id == ZORRO_PROD_GVP_GFORCE_030_SCSI ||
+		 z->id == ZORRO_PROD_GVP_A530_SCSI ||
+		 z->id == ZORRO_PROD_GVP_COMBO_030_R4_SCSI)
+	    default_dma_xfer_mask = ~0x01ffffff;
+	else if (z->id == ZORRO_PROD_GVP_A1291 ||
+		 z->id == ZORRO_PROD_GVP_GFORCE_040_SCSI_1)
+	    default_dma_xfer_mask = ~0x07ffffff;
+	else
+	    continue;
+
+	/*
+	 * Rumors state that some GVP ram boards use the same product
+	 * code as the SCSI controllers. Therefore if the board-size
+	 * is not 64KB we asume it is a ram board and bail out.
+	 */
+	if (z->resource.end-z->resource.start != 0xffff)
+		continue;
+
+	address = z->resource.start;
+	if (!request_mem_region(address, 256, "wd33c93"))
+	    continue;
+
+#ifdef CHECK_WD33C93
+
+	/*
+	 * These darn GVP boards are a problem - it can be tough to tell
+	 * whether or not they include a SCSI controller. This is the
+	 * ultimate Yet-Another-GVP-Detection-Hack in that it actually
+	 * probes for a WD33c93 chip: If we find one, it's extremely
+	 * likely that this card supports SCSI, regardless of Product_
+	 * Code, Board_Size, etc. 
+	 */
+
+    /* Get pointers to the presumed register locations and save contents */
+
+	sasr_3393 = &(((gvp11_scsiregs *)(ZTWO_VADDR(address)))->SASR);
+	scmd_3393 = &(((gvp11_scsiregs *)(ZTWO_VADDR(address)))->SCMD);
+	save_sasr = *sasr_3393;
+
+    /* First test the AuxStatus Reg */
+
+	q = *sasr_3393;		/* read it */
+	if (q & 0x08)		/* bit 3 should always be clear */
+		goto release;
+	*sasr_3393 = WD_AUXILIARY_STATUS;	 /* setup indirect address */
+	if (*sasr_3393 == WD_AUXILIARY_STATUS) { /* shouldn't retain the write */
+		*sasr_3393 = save_sasr;	/* Oops - restore this byte */
+		goto release;
+		}
+	if (*sasr_3393 != q) {	/* should still read the same */
+		*sasr_3393 = save_sasr;	/* Oops - restore this byte */
+		goto release;
+		}
+	if (*scmd_3393 != q)	/* and so should the image at 0x1f */
+		goto release;
+
+
+    /* Ok, we probably have a wd33c93, but let's check a few other places
+     * for good measure. Make sure that this works for both 'A and 'B    
+     * chip versions.
+     */
+
+	*sasr_3393 = WD_SCSI_STATUS;
+	q = *scmd_3393;
+	*sasr_3393 = WD_SCSI_STATUS;
+	*scmd_3393 = ~q;
+	*sasr_3393 = WD_SCSI_STATUS;
+	qq = *scmd_3393;
+	*sasr_3393 = WD_SCSI_STATUS;
+	*scmd_3393 = q;
+	if (qq != q)			/* should be read only */
+		goto release;
+	*sasr_3393 = 0x1e;	/* this register is unimplemented */
+	q = *scmd_3393;
+	*sasr_3393 = 0x1e;
+	*scmd_3393 = ~q;
+	*sasr_3393 = 0x1e;
+	qq = *scmd_3393;
+	*sasr_3393 = 0x1e;
+	*scmd_3393 = q;
+	if (qq != q || qq != 0xff)	/* should be read only, all 1's */
+		goto release;
+	*sasr_3393 = WD_TIMEOUT_PERIOD;
+	q = *scmd_3393;
+	*sasr_3393 = WD_TIMEOUT_PERIOD;
+	*scmd_3393 = ~q;
+	*sasr_3393 = WD_TIMEOUT_PERIOD;
+	qq = *scmd_3393;
+	*sasr_3393 = WD_TIMEOUT_PERIOD;
+	*scmd_3393 = q;
+	if (qq != (~q & 0xff))		/* should be read/write */
+		goto release;
+#endif
+
+	instance = scsi_register (tpnt, sizeof (struct WD33C93_hostdata));
+	if(instance == NULL)
+		goto release;
+	instance->base = ZTWO_VADDR(address);
+	instance->irq = IRQ_AMIGA_PORTS;
+	instance->unique_id = z->slotaddr;
+
+	if (gvp11_xfer_mask)
+		HDATA(instance)->dma_xfer_mask = gvp11_xfer_mask;
+	else
+		HDATA(instance)->dma_xfer_mask = default_dma_xfer_mask;
+
+
+	DMA(instance)->secret2 = 1;
+	DMA(instance)->secret1 = 0;
+	DMA(instance)->secret3 = 15;
+	while (DMA(instance)->CNTR & GVP11_DMAC_BUSY) ;
+	DMA(instance)->CNTR = 0;
+
+	DMA(instance)->BANK = 0;
+
+	epc = *(unsigned short *)(ZTWO_VADDR(address) + 0x8000);
+
+	/*
+	 * Check for 14MHz SCSI clock
+	 */
+	regs.SASR = &(DMA(instance)->SASR);
+	regs.SCMD = &(DMA(instance)->SCMD);
+	wd33c93_init(instance, regs, dma_setup, dma_stop,
+		     (epc & GVP_SCSICLKMASK) ? WD33C93_FS_8_10
+					     : WD33C93_FS_12_15);
+
+	request_irq(IRQ_AMIGA_PORTS, gvp11_intr, SA_SHIRQ, "GVP11 SCSI",
+		    instance);
+	DMA(instance)->CNTR = GVP11_DMAC_INT_ENABLE;
+	num_gvp11++;
+	continue;
+
+release:
+	release_mem_region(address, 256);
+    }
+
+    return num_gvp11;
+}
+
+static int gvp11_bus_reset(Scsi_Cmnd *cmd)
+{
+	/* FIXME perform bus-specific reset */
+	wd33c93_host_reset(cmd);
+	return SUCCESS;
+}
+
+
+#define HOSTS_C
+
+#include "gvp11.h"
+
+static Scsi_Host_Template driver_template = {
+	.proc_name		= "GVP11",
+	.name			= "GVP Series II SCSI",
+	.detect			= gvp11_detect,
+	.release		= gvp11_release,
+	.queuecommand		= wd33c93_queuecommand,
+	.eh_abort_handler	= wd33c93_abort,
+	.eh_bus_reset_handler	= gvp11_bus_reset,
+	.eh_host_reset_handler	= wd33c93_host_reset,
+	.can_queue		= CAN_QUEUE,
+	.this_id		= 7,
+	.sg_tablesize		= SG_ALL,
+	.cmd_per_lun		= CMD_PER_LUN,
+	.use_clustering		= DISABLE_CLUSTERING
+};
+
+
+#include "scsi_module.c"
+
+int gvp11_release(struct Scsi_Host *instance)
+{
+#ifdef MODULE
+    DMA(instance)->CNTR = 0;
+    release_mem_region(ZTWO_PADDR(instance->base), 256);
+    free_irq(IRQ_AMIGA_PORTS, instance);
+    wd33c93_release();
+#endif
+    return 1;
+}
+
+MODULE_LICENSE("GPL");