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1#include <linux/types.h>
2#include <linux/mm.h>
3#include <linux/ioport.h>
4#include <linux/init.h>
5#include <linux/slab.h>
6#include <linux/spinlock.h>
7#include <linux/interrupt.h>
8#include <linux/platform_device.h>
9
10#include <asm/page.h>
11#include <asm/pgtable.h>
12#include <asm/amigaints.h>
13#include <asm/amigahw.h>
14
15#include "scsi.h"
16#include "wd33c93.h"
17#include "a3000.h"
18
19
20struct a3000_hostdata {
21 struct WD33C93_hostdata wh;
22 struct a3000_scsiregs *regs;
23};
24
25static irqreturn_t a3000_intr(int irq, void *data)
26{
27 struct Scsi_Host *instance = data;
28 struct a3000_hostdata *hdata = shost_priv(instance);
29 unsigned int status = hdata->regs->ISTR;
30 unsigned long flags;
31
32 if (!(status & ISTR_INT_P))
33 return IRQ_NONE;
34 if (status & ISTR_INTS) {
35 spin_lock_irqsave(instance->host_lock, flags);
36 wd33c93_intr(instance);
37 spin_unlock_irqrestore(instance->host_lock, flags);
38 return IRQ_HANDLED;
39 }
40 pr_warning("Non-serviced A3000 SCSI-interrupt? ISTR = %02x\n", status);
41 return IRQ_NONE;
42}
43
44static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
45{
46 struct Scsi_Host *instance = cmd->device->host;
47 struct a3000_hostdata *hdata = shost_priv(instance);
48 struct WD33C93_hostdata *wh = &hdata->wh;
49 struct a3000_scsiregs *regs = hdata->regs;
50 unsigned short cntr = CNTR_PDMD | CNTR_INTEN;
51 unsigned long addr = virt_to_bus(cmd->SCp.ptr);
52
53 /*
54 * if the physical address has the wrong alignment, or if
55 * physical address is bad, or if it is a write and at the
56 * end of a physical memory chunk, then allocate a bounce
57 * buffer
58 */
59 if (addr & A3000_XFER_MASK) {
60 wh->dma_bounce_len = (cmd->SCp.this_residual + 511) & ~0x1ff;
61 wh->dma_bounce_buffer = kmalloc(wh->dma_bounce_len,
62 GFP_KERNEL);
63
64 /* can't allocate memory; use PIO */
65 if (!wh->dma_bounce_buffer) {
66 wh->dma_bounce_len = 0;
67 return 1;
68 }
69
70 if (!dir_in) {
71 /* copy to bounce buffer for a write */
72 memcpy(wh->dma_bounce_buffer, cmd->SCp.ptr,
73 cmd->SCp.this_residual);
74 }
75
76 addr = virt_to_bus(wh->dma_bounce_buffer);
77 }
78
79 /* setup dma direction */
80 if (!dir_in)
81 cntr |= CNTR_DDIR;
82
83 /* remember direction */
84 wh->dma_dir = dir_in;
85
86 regs->CNTR = cntr;
87
88 /* setup DMA *physical* address */
89 regs->ACR = addr;
90
91 if (dir_in) {
92 /* invalidate any cache */
93 cache_clear(addr, cmd->SCp.this_residual);
94 } else {
95 /* push any dirty cache */
96 cache_push(addr, cmd->SCp.this_residual);
97 }
98
99 /* start DMA */
100 mb(); /* make sure setup is completed */
101 regs->ST_DMA = 1;
102 mb(); /* make sure DMA has started before next IO */
103
104 /* return success */
105 return 0;
106}
107
108static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
109 int status)
110{
111 struct a3000_hostdata *hdata = shost_priv(instance);
112 struct WD33C93_hostdata *wh = &hdata->wh;
113 struct a3000_scsiregs *regs = hdata->regs;
114
115 /* disable SCSI interrupts */
116 unsigned short cntr = CNTR_PDMD;
117
118 if (!wh->dma_dir)
119 cntr |= CNTR_DDIR;
120
121 regs->CNTR = cntr;
122 mb(); /* make sure CNTR is updated before next IO */
123
124 /* flush if we were reading */
125 if (wh->dma_dir) {
126 regs->FLUSH = 1;
127 mb(); /* don't allow prefetch */
128 while (!(regs->ISTR & ISTR_FE_FLG))
129 barrier();
130 mb(); /* no IO until FLUSH is done */
131 }
132
133 /* clear a possible interrupt */
134 /* I think that this CINT is only necessary if you are
135 * using the terminal count features. HM 7 Mar 1994
136 */
137 regs->CINT = 1;
138
139 /* stop DMA */
140 regs->SP_DMA = 1;
141 mb(); /* make sure DMA is stopped before next IO */
142
143 /* restore the CONTROL bits (minus the direction flag) */
144 regs->CNTR = CNTR_PDMD | CNTR_INTEN;
145 mb(); /* make sure CNTR is updated before next IO */
146
147 /* copy from a bounce buffer, if necessary */
148 if (status && wh->dma_bounce_buffer) {
149 if (SCpnt) {
150 if (wh->dma_dir && SCpnt)
151 memcpy(SCpnt->SCp.ptr, wh->dma_bounce_buffer,
152 SCpnt->SCp.this_residual);
153 kfree(wh->dma_bounce_buffer);
154 wh->dma_bounce_buffer = NULL;
155 wh->dma_bounce_len = 0;
156 } else {
157 kfree(wh->dma_bounce_buffer);
158 wh->dma_bounce_buffer = NULL;
159 wh->dma_bounce_len = 0;
160 }
161 }
162}
163
164static int a3000_bus_reset(struct scsi_cmnd *cmd)
165{
166 struct Scsi_Host *instance = cmd->device->host;
167
168 /* FIXME perform bus-specific reset */
169
170 /* FIXME 2: kill this entire function, which should
171 cause mid-layer to call wd33c93_host_reset anyway? */
172
173 spin_lock_irq(instance->host_lock);
174 wd33c93_host_reset(cmd);
175 spin_unlock_irq(instance->host_lock);
176
177 return SUCCESS;
178}
179
180static struct scsi_host_template amiga_a3000_scsi_template = {
181 .module = THIS_MODULE,
182 .name = "Amiga 3000 built-in SCSI",
183 .proc_info = wd33c93_proc_info,
184 .proc_name = "A3000",
185 .queuecommand = wd33c93_queuecommand,
186 .eh_abort_handler = wd33c93_abort,
187 .eh_bus_reset_handler = a3000_bus_reset,
188 .eh_host_reset_handler = wd33c93_host_reset,
189 .can_queue = CAN_QUEUE,
190 .this_id = 7,
191 .sg_tablesize = SG_ALL,
192 .cmd_per_lun = CMD_PER_LUN,
193 .use_clustering = ENABLE_CLUSTERING
194};
195
196static int __init amiga_a3000_scsi_probe(struct platform_device *pdev)
197{
198 struct resource *res;
199 struct Scsi_Host *instance;
200 int error;
201 struct a3000_scsiregs *regs;
202 wd33c93_regs wdregs;
203 struct a3000_hostdata *hdata;
204
205 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
206 if (!res)
207 return -ENODEV;
208
209 if (!request_mem_region(res->start, resource_size(res), "wd33c93"))
210 return -EBUSY;
211
212 instance = scsi_host_alloc(&amiga_a3000_scsi_template,
213 sizeof(struct a3000_hostdata));
214 if (!instance) {
215 error = -ENOMEM;
216 goto fail_alloc;
217 }
218
219 instance->irq = IRQ_AMIGA_PORTS;
220
221 regs = (struct a3000_scsiregs *)ZTWO_VADDR(res->start);
222 regs->DAWR = DAWR_A3000;
223
224 wdregs.SASR = ®s->SASR;
225 wdregs.SCMD = ®s->SCMD;
226
227 hdata = shost_priv(instance);
228 hdata->wh.no_sync = 0xff;
229 hdata->wh.fast = 0;
230 hdata->wh.dma_mode = CTRL_DMA;
231 hdata->regs = regs;
232
233 wd33c93_init(instance, wdregs, dma_setup, dma_stop, WD33C93_FS_12_15);
234 error = request_irq(IRQ_AMIGA_PORTS, a3000_intr, IRQF_SHARED,
235 "A3000 SCSI", instance);
236 if (error)
237 goto fail_irq;
238
239 regs->CNTR = CNTR_PDMD | CNTR_INTEN;
240
241 error = scsi_add_host(instance, NULL);
242 if (error)
243 goto fail_host;
244
245 platform_set_drvdata(pdev, instance);
246
247 scsi_scan_host(instance);
248 return 0;
249
250fail_host:
251 free_irq(IRQ_AMIGA_PORTS, instance);
252fail_irq:
253 scsi_host_put(instance);
254fail_alloc:
255 release_mem_region(res->start, resource_size(res));
256 return error;
257}
258
259static int __exit amiga_a3000_scsi_remove(struct platform_device *pdev)
260{
261 struct Scsi_Host *instance = platform_get_drvdata(pdev);
262 struct a3000_hostdata *hdata = shost_priv(instance);
263 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
264
265 hdata->regs->CNTR = 0;
266 scsi_remove_host(instance);
267 free_irq(IRQ_AMIGA_PORTS, instance);
268 scsi_host_put(instance);
269 release_mem_region(res->start, resource_size(res));
270 return 0;
271}
272
273static struct platform_driver amiga_a3000_scsi_driver = {
274 .remove = __exit_p(amiga_a3000_scsi_remove),
275 .driver = {
276 .name = "amiga-a3000-scsi",
277 .owner = THIS_MODULE,
278 },
279};
280
281static int __init amiga_a3000_scsi_init(void)
282{
283 return platform_driver_probe(&amiga_a3000_scsi_driver,
284 amiga_a3000_scsi_probe);
285}
286module_init(amiga_a3000_scsi_init);
287
288static void __exit amiga_a3000_scsi_exit(void)
289{
290 platform_driver_unregister(&amiga_a3000_scsi_driver);
291}
292module_exit(amiga_a3000_scsi_exit);
293
294MODULE_DESCRIPTION("Amiga 3000 built-in SCSI");
295MODULE_LICENSE("GPL");
296MODULE_ALIAS("platform:amiga-a3000-scsi");
1#include <linux/types.h>
2#include <linux/mm.h>
3#include <linux/ioport.h>
4#include <linux/init.h>
5#include <linux/slab.h>
6#include <linux/spinlock.h>
7#include <linux/interrupt.h>
8#include <linux/platform_device.h>
9#include <linux/module.h>
10
11#include <asm/page.h>
12#include <asm/pgtable.h>
13#include <asm/amigaints.h>
14#include <asm/amigahw.h>
15
16#include "scsi.h"
17#include "wd33c93.h"
18#include "a3000.h"
19
20
21struct a3000_hostdata {
22 struct WD33C93_hostdata wh;
23 struct a3000_scsiregs *regs;
24};
25
26static irqreturn_t a3000_intr(int irq, void *data)
27{
28 struct Scsi_Host *instance = data;
29 struct a3000_hostdata *hdata = shost_priv(instance);
30 unsigned int status = hdata->regs->ISTR;
31 unsigned long flags;
32
33 if (!(status & ISTR_INT_P))
34 return IRQ_NONE;
35 if (status & ISTR_INTS) {
36 spin_lock_irqsave(instance->host_lock, flags);
37 wd33c93_intr(instance);
38 spin_unlock_irqrestore(instance->host_lock, flags);
39 return IRQ_HANDLED;
40 }
41 pr_warning("Non-serviced A3000 SCSI-interrupt? ISTR = %02x\n", status);
42 return IRQ_NONE;
43}
44
45static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
46{
47 struct Scsi_Host *instance = cmd->device->host;
48 struct a3000_hostdata *hdata = shost_priv(instance);
49 struct WD33C93_hostdata *wh = &hdata->wh;
50 struct a3000_scsiregs *regs = hdata->regs;
51 unsigned short cntr = CNTR_PDMD | CNTR_INTEN;
52 unsigned long addr = virt_to_bus(cmd->SCp.ptr);
53
54 /*
55 * if the physical address has the wrong alignment, or if
56 * physical address is bad, or if it is a write and at the
57 * end of a physical memory chunk, then allocate a bounce
58 * buffer
59 */
60 if (addr & A3000_XFER_MASK) {
61 wh->dma_bounce_len = (cmd->SCp.this_residual + 511) & ~0x1ff;
62 wh->dma_bounce_buffer = kmalloc(wh->dma_bounce_len,
63 GFP_KERNEL);
64
65 /* can't allocate memory; use PIO */
66 if (!wh->dma_bounce_buffer) {
67 wh->dma_bounce_len = 0;
68 return 1;
69 }
70
71 if (!dir_in) {
72 /* copy to bounce buffer for a write */
73 memcpy(wh->dma_bounce_buffer, cmd->SCp.ptr,
74 cmd->SCp.this_residual);
75 }
76
77 addr = virt_to_bus(wh->dma_bounce_buffer);
78 }
79
80 /* setup dma direction */
81 if (!dir_in)
82 cntr |= CNTR_DDIR;
83
84 /* remember direction */
85 wh->dma_dir = dir_in;
86
87 regs->CNTR = cntr;
88
89 /* setup DMA *physical* address */
90 regs->ACR = addr;
91
92 if (dir_in) {
93 /* invalidate any cache */
94 cache_clear(addr, cmd->SCp.this_residual);
95 } else {
96 /* push any dirty cache */
97 cache_push(addr, cmd->SCp.this_residual);
98 }
99
100 /* start DMA */
101 mb(); /* make sure setup is completed */
102 regs->ST_DMA = 1;
103 mb(); /* make sure DMA has started before next IO */
104
105 /* return success */
106 return 0;
107}
108
109static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
110 int status)
111{
112 struct a3000_hostdata *hdata = shost_priv(instance);
113 struct WD33C93_hostdata *wh = &hdata->wh;
114 struct a3000_scsiregs *regs = hdata->regs;
115
116 /* disable SCSI interrupts */
117 unsigned short cntr = CNTR_PDMD;
118
119 if (!wh->dma_dir)
120 cntr |= CNTR_DDIR;
121
122 regs->CNTR = cntr;
123 mb(); /* make sure CNTR is updated before next IO */
124
125 /* flush if we were reading */
126 if (wh->dma_dir) {
127 regs->FLUSH = 1;
128 mb(); /* don't allow prefetch */
129 while (!(regs->ISTR & ISTR_FE_FLG))
130 barrier();
131 mb(); /* no IO until FLUSH is done */
132 }
133
134 /* clear a possible interrupt */
135 /* I think that this CINT is only necessary if you are
136 * using the terminal count features. HM 7 Mar 1994
137 */
138 regs->CINT = 1;
139
140 /* stop DMA */
141 regs->SP_DMA = 1;
142 mb(); /* make sure DMA is stopped before next IO */
143
144 /* restore the CONTROL bits (minus the direction flag) */
145 regs->CNTR = CNTR_PDMD | CNTR_INTEN;
146 mb(); /* make sure CNTR is updated before next IO */
147
148 /* copy from a bounce buffer, if necessary */
149 if (status && wh->dma_bounce_buffer) {
150 if (SCpnt) {
151 if (wh->dma_dir && SCpnt)
152 memcpy(SCpnt->SCp.ptr, wh->dma_bounce_buffer,
153 SCpnt->SCp.this_residual);
154 kfree(wh->dma_bounce_buffer);
155 wh->dma_bounce_buffer = NULL;
156 wh->dma_bounce_len = 0;
157 } else {
158 kfree(wh->dma_bounce_buffer);
159 wh->dma_bounce_buffer = NULL;
160 wh->dma_bounce_len = 0;
161 }
162 }
163}
164
165static struct scsi_host_template amiga_a3000_scsi_template = {
166 .module = THIS_MODULE,
167 .name = "Amiga 3000 built-in SCSI",
168 .show_info = wd33c93_show_info,
169 .write_info = wd33c93_write_info,
170 .proc_name = "A3000",
171 .queuecommand = wd33c93_queuecommand,
172 .eh_abort_handler = wd33c93_abort,
173 .eh_host_reset_handler = wd33c93_host_reset,
174 .can_queue = CAN_QUEUE,
175 .this_id = 7,
176 .sg_tablesize = SG_ALL,
177 .cmd_per_lun = CMD_PER_LUN,
178 .use_clustering = ENABLE_CLUSTERING
179};
180
181static int __init amiga_a3000_scsi_probe(struct platform_device *pdev)
182{
183 struct resource *res;
184 struct Scsi_Host *instance;
185 int error;
186 struct a3000_scsiregs *regs;
187 wd33c93_regs wdregs;
188 struct a3000_hostdata *hdata;
189
190 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
191 if (!res)
192 return -ENODEV;
193
194 if (!request_mem_region(res->start, resource_size(res), "wd33c93"))
195 return -EBUSY;
196
197 instance = scsi_host_alloc(&amiga_a3000_scsi_template,
198 sizeof(struct a3000_hostdata));
199 if (!instance) {
200 error = -ENOMEM;
201 goto fail_alloc;
202 }
203
204 instance->irq = IRQ_AMIGA_PORTS;
205
206 regs = ZTWO_VADDR(res->start);
207 regs->DAWR = DAWR_A3000;
208
209 wdregs.SASR = ®s->SASR;
210 wdregs.SCMD = ®s->SCMD;
211
212 hdata = shost_priv(instance);
213 hdata->wh.no_sync = 0xff;
214 hdata->wh.fast = 0;
215 hdata->wh.dma_mode = CTRL_DMA;
216 hdata->regs = regs;
217
218 wd33c93_init(instance, wdregs, dma_setup, dma_stop, WD33C93_FS_12_15);
219 error = request_irq(IRQ_AMIGA_PORTS, a3000_intr, IRQF_SHARED,
220 "A3000 SCSI", instance);
221 if (error)
222 goto fail_irq;
223
224 regs->CNTR = CNTR_PDMD | CNTR_INTEN;
225
226 error = scsi_add_host(instance, NULL);
227 if (error)
228 goto fail_host;
229
230 platform_set_drvdata(pdev, instance);
231
232 scsi_scan_host(instance);
233 return 0;
234
235fail_host:
236 free_irq(IRQ_AMIGA_PORTS, instance);
237fail_irq:
238 scsi_host_put(instance);
239fail_alloc:
240 release_mem_region(res->start, resource_size(res));
241 return error;
242}
243
244static int __exit amiga_a3000_scsi_remove(struct platform_device *pdev)
245{
246 struct Scsi_Host *instance = platform_get_drvdata(pdev);
247 struct a3000_hostdata *hdata = shost_priv(instance);
248 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
249
250 hdata->regs->CNTR = 0;
251 scsi_remove_host(instance);
252 free_irq(IRQ_AMIGA_PORTS, instance);
253 scsi_host_put(instance);
254 release_mem_region(res->start, resource_size(res));
255 return 0;
256}
257
258static struct platform_driver amiga_a3000_scsi_driver = {
259 .remove = __exit_p(amiga_a3000_scsi_remove),
260 .driver = {
261 .name = "amiga-a3000-scsi",
262 },
263};
264
265module_platform_driver_probe(amiga_a3000_scsi_driver, amiga_a3000_scsi_probe);
266
267MODULE_DESCRIPTION("Amiga 3000 built-in SCSI");
268MODULE_LICENSE("GPL");
269MODULE_ALIAS("platform:amiga-a3000-scsi");