diff options
Diffstat (limited to 'drivers/scsi/gvp11.c')
| -rw-r--r-- | drivers/scsi/gvp11.c | 387 |
1 files changed, 387 insertions, 0 deletions
diff --git a/drivers/scsi/gvp11.c b/drivers/scsi/gvp11.c new file mode 100644 index 0000000..30cbf73 --- /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"); |