1 // SPDX-License-Identifier: GPL-2.0-only
9 #include <linux/module.h>
27 	struct Scsi_Host *instance = data;  in a2091_intr()  local
28 	struct a2091_hostdata *hdata = shost_priv(instance);  in a2091_intr()
29 	unsigned int status = hdata->regs->ISTR;  in a2091_intr()
35 	spin_lock_irqsave(instance->host_lock, flags);  in a2091_intr()
36 	wd33c93_intr(instance);  in a2091_intr()
37 	spin_unlock_irqrestore(instance->host_lock, flags);  in a2091_intr()
43 	struct Scsi_Host *instance = cmd->device->host;  in dma_setup()  local
44 	struct a2091_hostdata *hdata = shost_priv(instance);  in dma_setup()
45 	struct WD33C93_hostdata *wh = &hdata->wh;  in dma_setup()
46 	struct a2091_scsiregs *regs = hdata->regs;  in dma_setup()
48 	unsigned long addr = virt_to_bus(cmd->SCp.ptr);  in dma_setup()
52 		wh->dma_bounce_len = (cmd->SCp.this_residual + 511) & ~0x1ff;  in dma_setup()
53 		wh->dma_bounce_buffer = kmalloc(wh->dma_bounce_len,  in dma_setup()
57 		if (!wh->dma_bounce_buffer) {  in dma_setup()
58 			wh->dma_bounce_len = 0;  in dma_setup()
63 		addr = virt_to_bus(wh->dma_bounce_buffer);  in dma_setup()
68 			kfree(wh->dma_bounce_buffer);  in dma_setup()
69 			wh->dma_bounce_buffer = NULL;  in dma_setup()
70 			wh->dma_bounce_len = 0;  in dma_setup()
76 			memcpy(wh->dma_bounce_buffer, cmd->SCp.ptr,  in dma_setup()
77 			       cmd->SCp.this_residual);  in dma_setup()
86 	wh->dma_dir = dir_in;  in dma_setup()
88 	regs->CNTR = cntr;  in dma_setup()
91 	regs->ACR = addr;  in dma_setup()
95 		cache_clear(addr, cmd->SCp.this_residual);  in dma_setup()
98 		cache_push(addr, cmd->SCp.this_residual);  in dma_setup()
101 	regs->ST_DMA = 1;  in dma_setup()
107 static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,  in dma_stop()  argument
110 	struct a2091_hostdata *hdata = shost_priv(instance);  in dma_stop()
111 	struct WD33C93_hostdata *wh = &hdata->wh;  in dma_stop()
112 	struct a2091_scsiregs *regs = hdata->regs;  in dma_stop()
117 	if (!wh->dma_dir)  in dma_stop()
121 	regs->CNTR = cntr;  in dma_stop()
124 	if (wh->dma_dir) {  in dma_stop()
125 		regs->FLUSH = 1;  in dma_stop()
126 		while (!(regs->ISTR & ISTR_FE_FLG))  in dma_stop()
131 	regs->CINT = 1;  in dma_stop()
134 	regs->SP_DMA = 1;  in dma_stop()
137 	regs->CNTR = CNTR_PDMD | CNTR_INTEN;  in dma_stop()
140 	if (status && wh->dma_bounce_buffer) {  in dma_stop()
141 		if (wh->dma_dir)  in dma_stop()
142 			memcpy(SCpnt->SCp.ptr, wh->dma_bounce_buffer,  in dma_stop()
143 			       SCpnt->SCp.this_residual);  in dma_stop()
144 		kfree(wh->dma_bounce_buffer);  in dma_stop()
145 		wh->dma_bounce_buffer = NULL;  in dma_stop()
146 		wh->dma_bounce_len = 0;  in dma_stop()
151 	.module			= THIS_MODULE,
163 	.dma_boundary		= PAGE_SIZE - 1,
168 	struct Scsi_Host *instance;  in a2091_probe()  local
174 	if (!request_mem_region(z->resource.start, 256, "wd33c93"))  in a2091_probe()
175 		return -EBUSY;  in a2091_probe()
177 	instance = scsi_host_alloc(&a2091_scsi_template,  in a2091_probe()
179 	if (!instance) {  in a2091_probe()
180 		error = -ENOMEM;  in a2091_probe()
184 	instance->irq = IRQ_AMIGA_PORTS;  in a2091_probe()
185 	instance->unique_id = z->slotaddr;  in a2091_probe()
187 	regs = ZTWO_VADDR(z->resource.start);  in a2091_probe()
188 	regs->DAWR = DAWR_A2091;  in a2091_probe()
190 	wdregs.SASR = &regs->SASR;  in a2091_probe()
191 	wdregs.SCMD = &regs->SCMD;  in a2091_probe()
193 	hdata = shost_priv(instance);  in a2091_probe()
194 	hdata->wh.no_sync = 0xff;  in a2091_probe()
195 	hdata->wh.fast = 0;  in a2091_probe()
196 	hdata->wh.dma_mode = CTRL_DMA;  in a2091_probe()
197 	hdata->regs = regs;  in a2091_probe()
199 	wd33c93_init(instance, wdregs, dma_setup, dma_stop, WD33C93_FS_8_10);  in a2091_probe()
201 			    "A2091 SCSI", instance);  in a2091_probe()
205 	regs->CNTR = CNTR_PDMD | CNTR_INTEN;  in a2091_probe()
207 	error = scsi_add_host(instance, NULL);  in a2091_probe()
211 	zorro_set_drvdata(z, instance);  in a2091_probe()
213 	scsi_scan_host(instance);  in a2091_probe()
217 	free_irq(IRQ_AMIGA_PORTS, instance);  in a2091_probe()
219 	scsi_host_put(instance);  in a2091_probe()
221 	release_mem_region(z->resource.start, 256);  in a2091_probe()
227 	struct Scsi_Host *instance = zorro_get_drvdata(z);  in a2091_remove()  local
228 	struct a2091_hostdata *hdata = shost_priv(instance);  in a2091_remove()
230 	hdata->regs->CNTR = 0;  in a2091_remove()
231 	scsi_remove_host(instance);  in a2091_remove()
232 	free_irq(IRQ_AMIGA_PORTS, instance);  in a2091_remove()
233 	scsi_host_put(instance);  in a2091_remove()
234 	release_mem_region(z->resource.start, 256);  in a2091_remove()