drivers/scsi/gvp11.c

/* */
This source file includes following definitions.
gvp11_intr
gvp11_setup
dma_setup
dma_stop
gvp11_detect
   1 #include <linux/types.h>
   2 #include <linux/mm.h>
   3 #include <linux/blk.h>
   4 #include <linux/version.h>
   5 
   6 #include <asm/page.h>
   7 #include <asm/pgtable.h>
   8 #include <asm/bootinfo.h>
   9 #include <asm/amigaints.h>
  10 #include <asm/amigahw.h>
  11 #include <asm/zorro.h>
  12 #include <asm/irq.h>
  13 
  14 #include "scsi.h"
  15 #include "hosts.h"
  16 #include "wd33c93.h"
  17 #include "gvp11.h"
  18 
  19 #include<linux/stat.h>
  20 
  21 struct proc_dir_entry proc_scsi_gvp11 = {
  22     PROC_SCSI_GVP11, 5, "GVP11",
  23     S_IFDIR | S_IRUGO | S_IXUGO, 2
  24 };
  25 
  26 #define DMA(ptr) ((gvp11_scsiregs *)((ptr)->base))
  27 #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
  28 
  29 static struct Scsi_Host *first_instance = NULL;
  30 static Scsi_Host_Template *gvp11_template;
  31 
  32 static void gvp11_intr (int irq, struct pt_regs *fp, void *dummy)
     /*  */
  33 {
  34     unsigned int status;
  35     struct Scsi_Host *instance;
  36 
  37     for (instance = first_instance; instance &&
  38          instance->hostt == gvp11_template; instance = instance->next)
  39     {
  40         status = DMA(instance)->CNTR;
  41         if (!(status & GVP11_DMAC_INT_PENDING))
  42             continue;
  43 
  44         /* disable PORTS interrupt */
  45         custom.intena = IF_PORTS;
  46         wd33c93_intr (instance);
  47         /* enable PORTS interrupt */
  48         custom.intena = IF_SETCLR | IF_PORTS;
  49     }
  50 }
  51 
  52 /*
  53  * DMA transfer mask for GVP Series II SCSI controller.
  54  * Some versions can only DMA into the 24 bit address space
  55  * (0->16M).  Others can DMA into the full 32 bit address
  56  * space.  The default is to only allow DMA into the 24 bit
  57  * address space.  The "gvp11=0xFFFFFFFE" setup parameter can
  58  * be supplied to force an alternate (32 bit) mask.
  59  */
  60 static int gvp11_xfer_mask = GVP11_XFER_MASK;
  61 
  62 void gvp11_setup (char *str, int *ints)
     /*  */
  63 {
  64     gvp11_xfer_mask = ints[1];
  65 }
  66 
  67 static int dma_setup (Scsi_Cmnd *cmd, int dir_in)
     /*  */
  68 {
  69     unsigned short cntr = GVP11_DMAC_INT_ENABLE;
  70     unsigned long addr = VTOP(cmd->SCp.ptr);
  71 
  72     /* don't allow DMA if the physical address is bad */
  73     if (addr & gvp11_xfer_mask ||
  74         (!dir_in && mm_end_of_chunk (addr, cmd->SCp.this_residual)))
  75     {
  76         HDATA(cmd->host)->dma_bounce_len = (cmd->SCp.this_residual + 511)
  77             & ~0x1ff;
  78         HDATA(cmd->host)->dma_bounce_buffer =
  79             scsi_malloc (HDATA(cmd->host)->dma_bounce_len);
  80         
  81         /* can't allocate memory; use PIO */
  82         if (!HDATA(cmd->host)->dma_bounce_buffer) {
  83             HDATA(cmd->host)->dma_bounce_len = 0;
  84             return 1;
  85         }
  86 
  87         /* check if the address of the bounce buffer is OK */
  88         addr = VTOP(HDATA(cmd->host)->dma_bounce_buffer);
  89 
  90         if (addr & gvp11_xfer_mask) {
  91             scsi_free (HDATA(cmd->host)->dma_bounce_buffer,
  92                        HDATA(cmd->host)->dma_bounce_len);
  93             HDATA(cmd->host)->dma_bounce_buffer = NULL;
  94             HDATA(cmd->host)->dma_bounce_len = 0;
  95             return 1;
  96         }
  97             
  98         if (!dir_in) {
  99             /* copy to bounce buffer for a write */
 100             if (cmd->use_sg)
 101 #if 0
 102                 panic ("scsi%ddma: incomplete s/g support",
 103                        cmd->host->host_no);
 104 #else
 105                 memcpy (HDATA(cmd->host)->dma_bounce_buffer,
 106                                 cmd->SCp.ptr, cmd->SCp.this_residual);
 107 #endif
 108             else
 109                 memcpy (HDATA(cmd->host)->dma_bounce_buffer,
 110                         cmd->request_buffer, cmd->request_bufflen);
 111         }
 112     }
 113 
 114     /* setup dma direction */
 115     if (!dir_in)
 116         cntr |= GVP11_DMAC_DIR_WRITE;
 117 
 118     HDATA(cmd->host)->dma_dir = dir_in;
 119     DMA(cmd->host)->CNTR = cntr;
 120 
 121     /* setup DMA *physical* address */
 122     DMA(cmd->host)->ACR = addr;
 123 
 124     if (dir_in)
 125         /* invalidate any cache */
 126         cache_clear (addr, cmd->SCp.this_residual);
 127     else
 128         /* push any dirty cache */
 129         cache_push (addr, cmd->SCp.this_residual);
 130 
 131     /* start DMA */
 132     DMA(cmd->host)->ST_DMA = 1;
 133 
 134     /* return success */
 135     return 0;
 136 }
 137 
 138 static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt,
     /*  */
 139                       int status)
 140 {
 141     /* stop DMA */
 142     DMA(instance)->SP_DMA = 1;
 143     /* remove write bit from CONTROL bits */
 144     DMA(instance)->CNTR = GVP11_DMAC_INT_ENABLE;
 145 
 146     /* copy from a bounce buffer, if necessary */
 147     if (status && HDATA(instance)->dma_bounce_buffer) {
 148         if (SCpnt && SCpnt->use_sg) {
 149 #if 0
 150             panic ("scsi%d: incomplete s/g support",
 151                    instance->host_no);
 152 #else
 153             if( HDATA(instance)->dma_dir )
 154                 memcpy (SCpnt->SCp.ptr, 
 155                         HDATA(instance)->dma_bounce_buffer,
 156                         SCpnt->SCp.this_residual);
 157             scsi_free (HDATA(instance)->dma_bounce_buffer,
 158                        HDATA(instance)->dma_bounce_len);
 159             HDATA(instance)->dma_bounce_buffer = NULL;
 160             HDATA(instance)->dma_bounce_len = 0;
 161             
 162 #endif
 163         } else {
 164             if (HDATA(instance)->dma_dir && SCpnt)
 165                 memcpy (SCpnt->request_buffer,
 166                         HDATA(instance)->dma_bounce_buffer,
 167                         SCpnt->request_bufflen);
 168 
 169             scsi_free (HDATA(instance)->dma_bounce_buffer,
 170                        HDATA(instance)->dma_bounce_len);
 171             HDATA(instance)->dma_bounce_buffer = NULL;
 172             HDATA(instance)->dma_bounce_len = 0;
 173         }
 174     }
 175 }
 176 
 177 int gvp11_detect(Scsi_Host_Template *tpnt)
     /*  */
 178 {
 179     static unsigned char called = 0;
 180     struct Scsi_Host *instance;
 181     int i, manuf, product, num_gvp11 = 0;
 182     caddr_t address;
 183     enum GVP_ident epc;
 184 
 185     if (!MACH_IS_AMIGA || called)
 186         return 0;
 187     called = 1;
 188 
 189     tpnt->proc_dir = &proc_scsi_gvp11;
 190 
 191     for (i = 0; i < boot_info.bi_amiga.num_autocon; i++)
 192     {
 193         manuf = boot_info.bi_amiga.autocon[i].cd_Rom.er_Manufacturer;
 194         product = boot_info.bi_amiga.autocon[i].cd_Rom.er_Product;
 195 #if 0
 196 /* this seems to catch some non HD boards.  GVP is sooooo stupid */
 197         if (manuf == MANUF_GVP &&
 198             ((product == PROD_GVPIISCSI) || (product == PROD_GVPIISCSI_2))) {
 199 #else
 200         if (manuf == MANUF_GVP && product == PROD_GVPIISCSI) {
 201 #endif
 202             /* check extended product code */
 203             address = boot_info.bi_amiga.autocon[i].cd_BoardAddr;
 204             epc = *(unsigned short *)(ZTWO_VADDR(address) + 0x8000);
 205 
 206             epc = epc & GVP_EPCMASK;
 207 
 208             /* 
 209              * This should (hopefully) be the correct way to identify
 210              * all the different GVP SCSI controllers (except for the
 211              * SERIES I though).
 212              */
 213             if (!((epc == GVP_A1291_SCSI) || 
 214                   (epc == GVP_GFORCE_040_SCSI) ||
 215                   (epc == GVP_GFORCE_030_SCSI) ||
 216                   (epc == GVP_A530_SCSI) ||
 217                   (epc == GVP_COMBO_R4_SCSI) ||
 218                   (epc == GVP_COMBO_R3_SCSI) ||
 219                   (epc == GVP_SERIESII)))
 220                 continue;
 221 
 222             instance = scsi_register (tpnt,
 223                                       sizeof (struct WD33C93_hostdata));
 224             instance->base = (unsigned char *)ZTWO_VADDR(address);
 225             DMA(instance)->secret2 = 1;
 226             DMA(instance)->secret1 = 0;
 227             DMA(instance)->secret3 = 15;
 228             while (DMA(instance)->CNTR & GVP11_DMAC_BUSY) ;
 229             DMA(instance)->CNTR = 0;
 230             wd33c93_init(instance, (wd33c93_regs *)&(DMA(instance)->SASR),
 231                          dma_setup, dma_stop, WD33C93_FS_8_10);
 232             if (num_gvp11++ == 0) {
 233                 first_instance = instance;
 234                 gvp11_template = instance->hostt;
 235                 add_isr(IRQ_AMIGA_PORTS, gvp11_intr, 0, NULL, "GVP11 SCSI");
 236             }
 237             DMA(instance)->CNTR = GVP11_DMAC_INT_ENABLE;
 238 
 239 #if 0 /* The Zorro stuff is not totally integrated yet ! */
 240             boot_info.bi_amiga.autocon_configured |= 1<<i;
 241 #endif
 242 
 243         }
 244     }
 245 
 246     return num_gvp11;
 247 }
/* */
root/drivers/scsi/gvp11.c

DEFINITIONS
