patch-1.3.94 linux/drivers/scsi/gvp11.c
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- Lines: 247
- Date:
Mon Apr 1 22:14:33 1996
- Orig file:
v1.3.93/linux/drivers/scsi/gvp11.c
- Orig date:
Thu Jan 1 02:00:00 1970
diff -u --recursive --new-file v1.3.93/linux/drivers/scsi/gvp11.c linux/drivers/scsi/gvp11.c
@@ -0,0 +1,246 @@
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/blk.h>
+
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/bootinfo.h>
+#include <asm/amigaints.h>
+#include <asm/amigahw.h>
+#include <asm/zorro.h>
+#include <asm/irq.h>
+
+#include "scsi.h"
+#include "hosts.h"
+#include "wd33c93.h"
+#include "gvp11.h"
+
+#include<linux/stat.h>
+
+struct proc_dir_entry proc_scsi_gvp11 = {
+ PROC_SCSI_GVP11, 5, "GVP11",
+ S_IFDIR | S_IRUGO | S_IXUGO, 2
+};
+
+#define DMA(ptr) ((gvp11_scsiregs *)((ptr)->base))
+#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
+
+static struct Scsi_Host *first_instance = NULL;
+static Scsi_Host_Template *gvp11_template;
+
+static void gvp11_intr (int irq, struct pt_regs *fp, void *dummy)
+{
+ unsigned int status;
+ struct Scsi_Host *instance;
+
+ for (instance = first_instance; instance &&
+ instance->hostt == gvp11_template; instance = instance->next)
+ {
+ status = DMA(instance)->CNTR;
+ if (!(status & GVP11_DMAC_INT_PENDING))
+ continue;
+
+ /* disable PORTS interrupt */
+ custom.intena = IF_PORTS;
+ wd33c93_intr (instance);
+ /* enable PORTS interrupt */
+ custom.intena = IF_SETCLR | IF_PORTS;
+ }
+}
+
+/*
+ * DMA transfer mask for GVP Series II SCSI controller.
+ * Some versions can only DMA into the 24 bit address space
+ * (0->16M). Others can DMA into the full 32 bit address
+ * space. The default is to only allow DMA into the 24 bit
+ * address space. The "gvp11=0xFFFFFFFE" setup parameter can
+ * be supplied to force an alternate (32 bit) mask.
+ */
+static int gvp11_xfer_mask = GVP11_XFER_MASK;
+
+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 = VTOP(cmd->SCp.ptr);
+
+ /* don't allow DMA if the physical address is bad */
+ if (addr & gvp11_xfer_mask ||
+ (!dir_in && mm_end_of_chunk (addr, cmd->SCp.this_residual)))
+ {
+ HDATA(cmd->host)->dma_bounce_len = (cmd->SCp.this_residual + 511)
+ & ~0x1ff;
+ HDATA(cmd->host)->dma_bounce_buffer =
+ scsi_malloc (HDATA(cmd->host)->dma_bounce_len);
+
+ /* can't allocate memory; use PIO */
+ if (!HDATA(cmd->host)->dma_bounce_buffer) {
+ HDATA(cmd->host)->dma_bounce_len = 0;
+ return 1;
+ }
+
+ /* check if the address of the bounce buffer is OK */
+ addr = VTOP(HDATA(cmd->host)->dma_bounce_buffer);
+
+ if (addr & gvp11_xfer_mask) {
+ scsi_free (HDATA(cmd->host)->dma_bounce_buffer,
+ HDATA(cmd->host)->dma_bounce_len);
+ HDATA(cmd->host)->dma_bounce_buffer = NULL;
+ HDATA(cmd->host)->dma_bounce_len = 0;
+ return 1;
+ }
+
+ if (!dir_in) {
+ /* copy to bounce buffer for a write */
+ if (cmd->use_sg)
+#if 0
+ panic ("scsi%ddma: incomplete s/g support",
+ cmd->host->host_no);
+#else
+ memcpy (HDATA(cmd->host)->dma_bounce_buffer,
+ cmd->SCp.ptr, cmd->SCp.this_residual);
+#endif
+ else
+ memcpy (HDATA(cmd->host)->dma_bounce_buffer,
+ cmd->request_buffer, cmd->request_bufflen);
+ }
+ }
+
+ /* setup dma direction */
+ if (!dir_in)
+ cntr |= GVP11_DMAC_DIR_WRITE;
+
+ HDATA(cmd->host)->dma_dir = dir_in;
+ DMA(cmd->host)->CNTR = cntr;
+
+ /* setup DMA *physical* address */
+ DMA(cmd->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);
+
+ /* start DMA */
+ DMA(cmd->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 (SCpnt && SCpnt->use_sg) {
+#if 0
+ panic ("scsi%d: incomplete s/g support",
+ instance->host_no);
+#else
+ if( HDATA(instance)->dma_dir )
+ memcpy (SCpnt->SCp.ptr,
+ HDATA(instance)->dma_bounce_buffer,
+ SCpnt->SCp.this_residual);
+ scsi_free (HDATA(instance)->dma_bounce_buffer,
+ HDATA(instance)->dma_bounce_len);
+ HDATA(instance)->dma_bounce_buffer = NULL;
+ HDATA(instance)->dma_bounce_len = 0;
+
+#endif
+ } else {
+ if (HDATA(instance)->dma_dir && SCpnt)
+ memcpy (SCpnt->request_buffer,
+ HDATA(instance)->dma_bounce_buffer,
+ SCpnt->request_bufflen);
+
+ scsi_free (HDATA(instance)->dma_bounce_buffer,
+ HDATA(instance)->dma_bounce_len);
+ HDATA(instance)->dma_bounce_buffer = NULL;
+ HDATA(instance)->dma_bounce_len = 0;
+ }
+ }
+}
+
+int gvp11_detect(Scsi_Host_Template *tpnt)
+{
+ static unsigned char called = 0;
+ struct Scsi_Host *instance;
+ int i, manuf, product, num_gvp11 = 0;
+ caddr_t address;
+ enum GVP_ident epc;
+
+ if (!MACH_IS_AMIGA || called)
+ return 0;
+ called = 1;
+
+ tpnt->proc_dir = &proc_scsi_gvp11;
+
+ for (i = 0; i < boot_info.bi_amiga.num_autocon; i++)
+ {
+ manuf = boot_info.bi_amiga.autocon[i].cd_Rom.er_Manufacturer;
+ product = boot_info.bi_amiga.autocon[i].cd_Rom.er_Product;
+#if 0
+/* this seems to catch some non HD boards. GVP is sooooo stupid */
+ if (manuf == MANUF_GVP &&
+ ((product == PROD_GVPIISCSI) || (product == PROD_GVPIISCSI_2))) {
+#else
+ if (manuf == MANUF_GVP && product == PROD_GVPIISCSI) {
+#endif
+ /* check extended product code */
+ address = boot_info.bi_amiga.autocon[i].cd_BoardAddr;
+ epc = *(unsigned short *)(ZTWO_VADDR(address) + 0x8000);
+
+ epc = epc & GVP_EPCMASK;
+
+ /*
+ * This should (hopefully) be the correct way to identify
+ * all the different GVP SCSI controllers (except for the
+ * SERIES I though).
+ */
+ if (!((epc == GVP_A1291_SCSI) ||
+ (epc == GVP_GFORCE_040_SCSI) ||
+ (epc == GVP_GFORCE_030_SCSI) ||
+ (epc == GVP_A530_SCSI) ||
+ (epc == GVP_COMBO_R4_SCSI) ||
+ (epc == GVP_COMBO_R3_SCSI) ||
+ (epc == GVP_SERIESII)))
+ continue;
+
+ instance = scsi_register (tpnt,
+ sizeof (struct WD33C93_hostdata));
+ instance->base = (unsigned char *)ZTWO_VADDR(address);
+ DMA(instance)->secret2 = 1;
+ DMA(instance)->secret1 = 0;
+ DMA(instance)->secret3 = 15;
+ while (DMA(instance)->CNTR & GVP11_DMAC_BUSY) ;
+ DMA(instance)->CNTR = 0;
+ wd33c93_init(instance, (wd33c93_regs *)&(DMA(instance)->SASR),
+ dma_setup, dma_stop, WD33C93_FS_8_10);
+ if (num_gvp11++ == 0) {
+ first_instance = instance;
+ gvp11_template = instance->hostt;
+ add_isr(IRQ_AMIGA_PORTS, gvp11_intr, 0, NULL, "GVP11 SCSI");
+ }
+ DMA(instance)->CNTR = GVP11_DMAC_INT_ENABLE;
+
+#if 0 /* The Zorro stuff is not totally integrated yet ! */
+ boot_info.bi_amiga.autocon_configured |= 1<<i;
+#endif
+
+ }
+ }
+
+ return num_gvp11;
+}
FUNET's LINUX-ADM group, [email protected]
TCL-scripts by Sam Shen, [email protected]
with Sam's (original) version of this