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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [scsi/] [gvp11.c] - Rev 1774
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#include <linux/types.h> #include <linux/mm.h> #include <linux/blk.h> #include <linux/sched.h> #include <linux/version.h> #include <linux/init.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 "hosts.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 struct Scsi_Host *first_instance = NULL; static Scsi_Host_Template *gvp11_template; static void gvp11_intr (int irq, void *dummy, struct pt_regs *fp) { unsigned long flags; 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; spin_lock_irqsave(&io_request_lock, flags); wd33c93_intr (instance); spin_unlock_irqrestore(&io_request_lock, flags); } } 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->host)->dma_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; if( !scsi_alloc_out_of_range ) { HDATA(cmd->host)->dma_bounce_buffer = scsi_malloc (HDATA(cmd->host)->dma_bounce_len); HDATA(cmd->host)->dma_buffer_pool = BUF_SCSI_ALLOCED; } if ( scsi_alloc_out_of_range || !HDATA(cmd->host)->dma_bounce_buffer) { HDATA(cmd->host)->dma_bounce_buffer = amiga_chip_alloc(HDATA(cmd->host)->dma_bounce_len, "GVP II SCSI Bounce Buffer"); if(!HDATA(cmd->host)->dma_bounce_buffer) { HDATA(cmd->host)->dma_bounce_len = 0; return 1; } HDATA(cmd->host)->dma_buffer_pool = BUF_CHIP_ALLOCED; } /* check if the address of the bounce buffer is OK */ addr = virt_to_bus(HDATA(cmd->host)->dma_bounce_buffer); if (addr & HDATA(cmd->host)->dma_xfer_mask) { /* fall back to Chip RAM if address out of range */ if( HDATA(cmd->host)->dma_buffer_pool == BUF_SCSI_ALLOCED) { scsi_free (HDATA(cmd->host)->dma_bounce_buffer, HDATA(cmd->host)->dma_bounce_len); scsi_alloc_out_of_range = 1; } else { amiga_chip_free (HDATA(cmd->host)->dma_bounce_buffer); } HDATA(cmd->host)->dma_bounce_buffer = amiga_chip_alloc(HDATA(cmd->host)->dma_bounce_len, "GVP II SCSI Bounce Buffer"); if(!HDATA(cmd->host)->dma_bounce_buffer) { HDATA(cmd->host)->dma_bounce_len = 0; return 1; } addr = virt_to_bus(HDATA(cmd->host)->dma_bounce_buffer); HDATA(cmd->host)->dma_buffer_pool = BUF_CHIP_ALLOCED; } if (!dir_in) { /* copy to bounce buffer for a write */ memcpy (HDATA(cmd->host)->dma_bounce_buffer, cmd->SCp.ptr, cmd->SCp.this_residual); } } /* 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); if ((bank_mask = (~HDATA(cmd->host)->dma_xfer_mask >> 18) & 0x01c0)) DMA(cmd->host)->BANK = bank_mask & (addr >> 18); /* 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 (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) scsi_free (HDATA(instance)->dma_bounce_buffer, HDATA(instance)->dma_bounce_len); else amiga_chip_free(HDATA(instance)->dma_bounce_buffer); HDATA(instance)->dma_bounce_buffer = NULL; HDATA(instance)->dma_bounce_len = 0; } } static int num_gvp11 = 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; #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); if (num_gvp11++ == 0) { first_instance = instance; gvp11_template = instance->hostt; request_irq(IRQ_AMIGA_PORTS, gvp11_intr, SA_SHIRQ, "GVP11 SCSI", gvp11_intr); } DMA(instance)->CNTR = GVP11_DMAC_INT_ENABLE; continue; release: release_mem_region(address, 256); } return num_gvp11; } #define HOSTS_C #include "gvp11.h" static Scsi_Host_Template driver_template = GVP11_SCSI; #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); if (--num_gvp11 == 0) free_irq(IRQ_AMIGA_PORTS, gvp11_intr); wd33c93_release(); #endif return 1; } MODULE_LICENSE("GPL");
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