1 #include <linux/types.h> 2 #include <linux/mm.h> 3 #include <linux/blkdev.h> 4 #include <linux/sched.h> 5 #include <linux/version.h> 6 #include <linux/interrupt.h> 7 8 #include <asm/page.h> 9 #include <asm/pgtable.h> 10 #include <asm/mvme147hw.h> 11 #include <asm/irq.h> 12 13 #include "scsi.h" 14 #include <scsi/scsi_host.h> 15 #include "wd33c93.h" 16 #include "mvme147.h" 17 18 #include<linux/stat.h> 19 20 #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata)) 21 22 static struct Scsi_Host *mvme147_host = NULL; 23 24 static irqreturn_t mvme147_intr (int irq, void *dummy, struct pt_regs *fp) 25 { 26 if (irq == MVME147_IRQ_SCSI_PORT) 27 wd33c93_intr (mvme147_host); 28 else 29 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */ 30 return IRQ_HANDLED; 31 } 32 33 static int dma_setup (Scsi_Cmnd *cmd, int dir_in) 34 { 35 unsigned char flags = 0x01; 36 unsigned long addr = virt_to_bus(cmd->SCp.ptr); 37 38 /* setup dma direction */ 39 if (!dir_in) 40 flags |= 0x04; 41 42 /* remember direction */ 43 HDATA(mvme147_host)->dma_dir = dir_in; 44 45 if (dir_in) 46 /* invalidate any cache */ 47 cache_clear (addr, cmd->SCp.this_residual); 48 else 49 /* push any dirty cache */ 50 cache_push (addr, cmd->SCp.this_residual); 51 52 /* start DMA */ 53 m147_pcc->dma_bcr = cmd->SCp.this_residual | (1<<24); 54 m147_pcc->dma_dadr = addr; 55 m147_pcc->dma_cntrl = flags; 56 57 /* return success */ 58 return 0; 59 } 60 61 static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt, 62 int status) 63 { 64 m147_pcc->dma_cntrl = 0; 65 } 66 67 int mvme147_detect(Scsi_Host_Template *tpnt) 68 { 69 static unsigned char called = 0; 70 wd33c93_regs regs; 71 72 if (!MACH_IS_MVME147 || called) 73 return 0; 74 called++; 75 76 tpnt->proc_name = "MVME147"; 77 tpnt->proc_info = &wd33c93_proc_info; 78 79 mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata)); 80 if (!mvme147_host) 81 goto err_out; 82 83 mvme147_host->base = 0xfffe4000; 84 mvme147_host->irq = MVME147_IRQ_SCSI_PORT; 85 regs.SASR = (volatile unsigned char *)0xfffe4000; 86 regs.SCMD = (volatile unsigned char *)0xfffe4001; 87 wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10); 88 89 if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr)) 90 goto err_unregister; 91 if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr)) 92 goto err_free_irq; 93 #if 0 /* Disabled; causes problems booting */ 94 m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */ 95 udelay(100); 96 m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */ 97 udelay(2000); 98 m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */ 99 #endif 100 m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */ 101 102 m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */ 103 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */ 104 105 return 1; 106 107 err_free_irq: 108 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr); 109 err_unregister: 110 wd33c93_release(); 111 scsi_unregister(mvme147_host); 112 err_out: 113 return 0; 114 } 115 116 static int mvme147_bus_reset(Scsi_Cmnd *cmd) 117 { 118 /* FIXME perform bus-specific reset */ 119 wd33c93_host_reset(cmd); 120 return SUCCESS; 121 } 122 123 #define HOSTS_C 124 125 #include "mvme147.h" 126 127 static Scsi_Host_Template driver_template = { 128 .proc_name = "MVME147", 129 .name = "MVME147 built-in SCSI", 130 .detect = mvme147_detect, 131 .release = mvme147_release, 132 .queuecommand = wd33c93_queuecommand, 133 .eh_abort_handler = wd33c93_abort, 134 .eh_bus_reset_handler = mvme147_bus_reset, 135 .eh_host_reset_handler = wd33c93_host_reset, 136 .can_queue = CAN_QUEUE, 137 .this_id = 7, 138 .sg_tablesize = SG_ALL, 139 .cmd_per_lun = CMD_PER_LUN, 140 .use_clustering = ENABLE_CLUSTERING 141 }; 142 143 144 #include "scsi_module.c" 145 146 int mvme147_release(struct Scsi_Host *instance) 147 { 148 #ifdef MODULE 149 /* XXX Make sure DMA is stopped! */ 150 wd33c93_release(); 151 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr); 152 free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr); 153 #endif 154 return 1; 155 } 156