#include <linux/types.h> #include <linux/mm.h> #include <linux/blkdev.h> #include <linux/sched.h> #include <linux/interrupt.h> #include <asm/page.h> #include <asm/pgtable.h> #include <asm/mvme147hw.h> #include <asm/irq.h> #include "scsi.h" #include <scsi/scsi_host.h> #include "wd33c93.h" #include "mvme147.h" #include<linux/stat.h> #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata)) static struct Scsi_Host *mvme147_host = NULL; static irqreturn_t mvme147_intr (int irq, void *dummy, struct pt_regs *fp) { if (irq == MVME147_IRQ_SCSI_PORT) wd33c93_intr (mvme147_host); else m147_pcc->dma_intr = 0x89; /* Ack and enable ints */ return IRQ_HANDLED; } static int dma_setup (Scsi_Cmnd *cmd, int dir_in) { unsigned char flags = 0x01; unsigned long addr = virt_to_bus(cmd->SCp.ptr); /* setup dma direction */ if (!dir_in) flags |= 0x04; /* remember direction */ HDATA(mvme147_host)->dma_dir = dir_in; 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 */ m147_pcc->dma_bcr = cmd->SCp.this_residual | (1<<24); m147_pcc->dma_dadr = addr; m147_pcc->dma_cntrl = flags; /* return success */ return 0; } static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt, int status) { m147_pcc->dma_cntrl = 0; } int mvme147_detect(struct scsi_host_template *tpnt) { static unsigned char called = 0; wd33c93_regs regs; if (!MACH_IS_MVME147 || called) return 0; called++; tpnt->proc_name = "MVME147"; tpnt->proc_info = &wd33c93_proc_info; mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata)); if (!mvme147_host) goto err_out; mvme147_host->base = 0xfffe4000; mvme147_host->irq = MVME147_IRQ_SCSI_PORT; regs.SASR = (volatile unsigned char *)0xfffe4000; regs.SCMD = (volatile unsigned char *)0xfffe4001; wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10); if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr)) goto err_unregister; if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr)) goto err_free_irq; #if 0 /* Disabled; causes problems booting */ m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */ udelay(100); m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */ udelay(2000); m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */ #endif m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */ m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */ m147_pcc->dma_intr = 0x89; /* Ack and enable ints */ return 1; err_free_irq: free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr); err_unregister: wd33c93_release(); scsi_unregister(mvme147_host); err_out: return 0; } static int mvme147_bus_reset(Scsi_Cmnd *cmd) { /* FIXME perform bus-specific reset */ /* FIXME 2: kill this function, and let midlayer fallback to the same result, calling wd33c93_host_reset() */ spin_lock_irq(cmd->device->host->host_lock); wd33c93_host_reset(cmd); spin_unlock_irq(cmd->device->host->host_lock); return SUCCESS; } #define HOSTS_C #include "mvme147.h" static struct scsi_host_template driver_template = { .proc_name = "MVME147", .name = "MVME147 built-in SCSI", .detect = mvme147_detect, .release = mvme147_release, .queuecommand = wd33c93_queuecommand, .eh_abort_handler = wd33c93_abort, .eh_bus_reset_handler = mvme147_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 = ENABLE_CLUSTERING }; #include "scsi_module.c" int mvme147_release(struct Scsi_Host *instance) { #ifdef MODULE /* XXX Make sure DMA is stopped! */ wd33c93_release(); free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr); free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr); #endif return 1; }