1 // SPDX-License-Identifier: GPL-2.0-only
10 #include <linux/module.h>
28 	struct Scsi_Host *instance = data;  in a3000_intr()  local
29 	struct a3000_hostdata *hdata = shost_priv(instance);  in a3000_intr()
30 	unsigned int status = hdata->regs->ISTR;  in a3000_intr()
36 		spin_lock_irqsave(instance->host_lock, flags);  in a3000_intr()
37 		wd33c93_intr(instance);  in a3000_intr()
38 		spin_unlock_irqrestore(instance->host_lock, flags);  in a3000_intr()
41 	pr_warn("Non-serviced A3000 SCSI-interrupt? ISTR = %02x\n", status);  in a3000_intr()
47 	struct Scsi_Host *instance = cmd->device->host;  in dma_setup()  local
48 	struct a3000_hostdata *hdata = shost_priv(instance);  in dma_setup()
49 	struct WD33C93_hostdata *wh = &hdata->wh;  in dma_setup()
50 	struct a3000_scsiregs *regs = hdata->regs;  in dma_setup()
52 	unsigned long addr = virt_to_bus(cmd->SCp.ptr);  in dma_setup()
61 		wh->dma_bounce_len = (cmd->SCp.this_residual + 511) & ~0x1ff;  in dma_setup()
62 		wh->dma_bounce_buffer = kmalloc(wh->dma_bounce_len,  in dma_setup()
66 		if (!wh->dma_bounce_buffer) {  in dma_setup()
67 			wh->dma_bounce_len = 0;  in dma_setup()
73 			memcpy(wh->dma_bounce_buffer, cmd->SCp.ptr,  in dma_setup()
74 			       cmd->SCp.this_residual);  in dma_setup()
77 		addr = virt_to_bus(wh->dma_bounce_buffer);  in dma_setup()
85 	wh->dma_dir = dir_in;  in dma_setup()
87 	regs->CNTR = cntr;  in dma_setup()
90 	regs->ACR = addr;  in dma_setup()
94 		cache_clear(addr, cmd->SCp.this_residual);  in dma_setup()
97 		cache_push(addr, cmd->SCp.this_residual);  in dma_setup()
102 	regs->ST_DMA = 1;  in dma_setup()
109 static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,  in dma_stop()  argument
112 	struct a3000_hostdata *hdata = shost_priv(instance);  in dma_stop()
113 	struct WD33C93_hostdata *wh = &hdata->wh;  in dma_stop()
114 	struct a3000_scsiregs *regs = hdata->regs;  in dma_stop()
119 	if (!wh->dma_dir)  in dma_stop()
122 	regs->CNTR = cntr;  in dma_stop()
126 	if (wh->dma_dir) {  in dma_stop()
127 		regs->FLUSH = 1;  in dma_stop()
129 		while (!(regs->ISTR & ISTR_FE_FLG))  in dma_stop()
138 	regs->CINT = 1;  in dma_stop()
141 	regs->SP_DMA = 1;  in dma_stop()
145 	regs->CNTR = CNTR_PDMD | CNTR_INTEN;  in dma_stop()
149 	if (status && wh->dma_bounce_buffer) {  in dma_stop()
151 			if (wh->dma_dir && SCpnt)  in dma_stop()
152 				memcpy(SCpnt->SCp.ptr, wh->dma_bounce_buffer,  in dma_stop()
153 				       SCpnt->SCp.this_residual);  in dma_stop()
154 			kfree(wh->dma_bounce_buffer);  in dma_stop()
155 			wh->dma_bounce_buffer = NULL;  in dma_stop()
156 			wh->dma_bounce_len = 0;  in dma_stop()
158 			kfree(wh->dma_bounce_buffer);  in dma_stop()
159 			wh->dma_bounce_buffer = NULL;  in dma_stop()
160 			wh->dma_bounce_len = 0;  in dma_stop()
166 	.module			= THIS_MODULE,
167 	.name			= "Amiga 3000 built-in SCSI",
183 	struct Scsi_Host *instance;  in amiga_a3000_scsi_probe()  local
191 		return -ENODEV;  in amiga_a3000_scsi_probe()
193 	if (!request_mem_region(res->start, resource_size(res), "wd33c93"))  in amiga_a3000_scsi_probe()
194 		return -EBUSY;  in amiga_a3000_scsi_probe()
196 	instance = scsi_host_alloc(&amiga_a3000_scsi_template,  in amiga_a3000_scsi_probe()
198 	if (!instance) {  in amiga_a3000_scsi_probe()
199 		error = -ENOMEM;  in amiga_a3000_scsi_probe()
203 	instance->irq = IRQ_AMIGA_PORTS;  in amiga_a3000_scsi_probe()
205 	regs = ZTWO_VADDR(res->start);  in amiga_a3000_scsi_probe()
206 	regs->DAWR = DAWR_A3000;  in amiga_a3000_scsi_probe()
208 	wdregs.SASR = &regs->SASR;  in amiga_a3000_scsi_probe()
209 	wdregs.SCMD = &regs->SCMD;  in amiga_a3000_scsi_probe()
211 	hdata = shost_priv(instance);  in amiga_a3000_scsi_probe()
212 	hdata->wh.no_sync = 0xff;  in amiga_a3000_scsi_probe()
213 	hdata->wh.fast = 0;  in amiga_a3000_scsi_probe()
214 	hdata->wh.dma_mode = CTRL_DMA;  in amiga_a3000_scsi_probe()
215 	hdata->regs = regs;  in amiga_a3000_scsi_probe()
217 	wd33c93_init(instance, wdregs, dma_setup, dma_stop, WD33C93_FS_12_15);  in amiga_a3000_scsi_probe()
219 			    "A3000 SCSI", instance);  in amiga_a3000_scsi_probe()
223 	regs->CNTR = CNTR_PDMD | CNTR_INTEN;  in amiga_a3000_scsi_probe()
225 	error = scsi_add_host(instance, NULL);  in amiga_a3000_scsi_probe()
229 	platform_set_drvdata(pdev, instance);  in amiga_a3000_scsi_probe()
231 	scsi_scan_host(instance);  in amiga_a3000_scsi_probe()
235 	free_irq(IRQ_AMIGA_PORTS, instance);  in amiga_a3000_scsi_probe()
237 	scsi_host_put(instance);  in amiga_a3000_scsi_probe()
239 	release_mem_region(res->start, resource_size(res));  in amiga_a3000_scsi_probe()
245 	struct Scsi_Host *instance = platform_get_drvdata(pdev);  in amiga_a3000_scsi_remove()  local
246 	struct a3000_hostdata *hdata = shost_priv(instance);  in amiga_a3000_scsi_remove()
249 	hdata->regs->CNTR = 0;  in amiga_a3000_scsi_remove()
250 	scsi_remove_host(instance);  in amiga_a3000_scsi_remove()
251 	free_irq(IRQ_AMIGA_PORTS, instance);  in amiga_a3000_scsi_remove()
252 	scsi_host_put(instance);  in amiga_a3000_scsi_remove()
253 	release_mem_region(res->start, resource_size(res));  in amiga_a3000_scsi_remove()
260 		.name	= "amiga-a3000-scsi",
266 MODULE_DESCRIPTION("Amiga 3000 built-in SCSI");
268 MODULE_ALIAS("platform:amiga-a3000-scsi");