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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | // SPDX-License-Identifier: GPL-2.0 #include <linux/types.h> #include <linux/mm.h> #include <linux/blkdev.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> static irqreturn_t mvme147_intr(int irq, void *data) { struct Scsi_Host *instance = data; if (irq == MVME147_IRQ_SCSI_PORT) wd33c93_intr(instance); else m147_pcc->dma_intr = 0x89; /* Ack and enable ints */ return IRQ_HANDLED; } static int dma_setup(struct scsi_cmnd *cmd, int dir_in) { struct Scsi_Host *instance = cmd->device->host; struct WD33C93_hostdata *hdata = shost_priv(instance); unsigned char flags = 0x01; unsigned long addr = virt_to_bus(cmd->SCp.ptr); /* setup dma direction */ if (!dir_in) flags |= 0x04; /* remember direction */ hdata->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, struct scsi_cmnd *SCpnt, int status) { m147_pcc->dma_cntrl = 0; } int mvme147_detect(struct scsi_host_template *tpnt) { static unsigned char called = 0; struct Scsi_Host *instance; wd33c93_regs regs; struct WD33C93_hostdata *hdata; if (!MACH_IS_MVME147 || called) return 0; called++; tpnt->proc_name = "MVME147"; tpnt->show_info = wd33c93_show_info, tpnt->write_info = wd33c93_write_info, instance = scsi_register(tpnt, sizeof(struct WD33C93_hostdata)); if (!instance) goto err_out; instance->base = 0xfffe4000; instance->irq = MVME147_IRQ_SCSI_PORT; regs.SASR = (volatile unsigned char *)0xfffe4000; regs.SCMD = (volatile unsigned char *)0xfffe4001; hdata = shost_priv(instance); hdata->no_sync = 0xff; hdata->fast = 0; hdata->dma_mode = CTRL_DMA; wd33c93_init(instance, regs, dma_setup, dma_stop, WD33C93_FS_8_10); if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", instance)) goto err_unregister; if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", instance)) 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: scsi_unregister(instance); err_out: return 0; } 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_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! */ free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr); free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr); #endif return 1; } |