Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/types.h> |
2 | #include <linux/mm.h> | |
5a0e3ad6 | 3 | #include <linux/slab.h> |
1da177e4 | 4 | #include <linux/blkdev.h> |
1da177e4 LT |
5 | #include <linux/init.h> |
6 | #include <linux/interrupt.h> | |
7 | ||
8 | #include <asm/setup.h> | |
9 | #include <asm/page.h> | |
10 | #include <asm/pgtable.h> | |
11 | #include <asm/amigaints.h> | |
12 | #include <asm/amigahw.h> | |
13 | #include <linux/zorro.h> | |
14 | #include <asm/irq.h> | |
15 | #include <linux/spinlock.h> | |
16 | ||
17 | #include "scsi.h" | |
18 | #include <scsi/scsi_host.h> | |
19 | #include "wd33c93.h" | |
20 | #include "a2091.h" | |
21 | ||
22 | #include<linux/stat.h> | |
23 | ||
24 | #define DMA(ptr) ((a2091_scsiregs *)((ptr)->base)) | |
25 | #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata)) | |
26 | ||
5880f486 AB |
27 | static int a2091_release(struct Scsi_Host *instance); |
28 | ||
7d12e780 | 29 | static irqreturn_t a2091_intr (int irq, void *_instance) |
1da177e4 LT |
30 | { |
31 | unsigned long flags; | |
32 | unsigned int status; | |
33 | struct Scsi_Host *instance = (struct Scsi_Host *)_instance; | |
34 | ||
35 | status = DMA(instance)->ISTR; | |
36 | if (!(status & (ISTR_INT_F|ISTR_INT_P)) || !(status & ISTR_INTS)) | |
37 | return IRQ_NONE; | |
38 | ||
39 | spin_lock_irqsave(instance->host_lock, flags); | |
40 | wd33c93_intr(instance); | |
41 | spin_unlock_irqrestore(instance->host_lock, flags); | |
42 | return IRQ_HANDLED; | |
43 | } | |
44 | ||
65396410 | 45 | static int dma_setup(struct scsi_cmnd *cmd, int dir_in) |
1da177e4 LT |
46 | { |
47 | unsigned short cntr = CNTR_PDMD | CNTR_INTEN; | |
48 | unsigned long addr = virt_to_bus(cmd->SCp.ptr); | |
49 | struct Scsi_Host *instance = cmd->device->host; | |
50 | ||
51 | /* don't allow DMA if the physical address is bad */ | |
7b892806 | 52 | if (addr & A2091_XFER_MASK) |
1da177e4 LT |
53 | { |
54 | HDATA(instance)->dma_bounce_len = (cmd->SCp.this_residual + 511) | |
55 | & ~0x1ff; | |
56 | HDATA(instance)->dma_bounce_buffer = | |
57 | kmalloc (HDATA(instance)->dma_bounce_len, GFP_KERNEL); | |
58 | ||
59 | /* can't allocate memory; use PIO */ | |
60 | if (!HDATA(instance)->dma_bounce_buffer) { | |
61 | HDATA(instance)->dma_bounce_len = 0; | |
62 | return 1; | |
63 | } | |
64 | ||
65 | /* get the physical address of the bounce buffer */ | |
66 | addr = virt_to_bus(HDATA(instance)->dma_bounce_buffer); | |
67 | ||
68 | /* the bounce buffer may not be in the first 16M of physmem */ | |
69 | if (addr & A2091_XFER_MASK) { | |
70 | /* we could use chipmem... maybe later */ | |
71 | kfree (HDATA(instance)->dma_bounce_buffer); | |
72 | HDATA(instance)->dma_bounce_buffer = NULL; | |
73 | HDATA(instance)->dma_bounce_len = 0; | |
74 | return 1; | |
75 | } | |
76 | ||
77 | if (!dir_in) { | |
f2c1afa5 | 78 | /* copy to bounce buffer for a write */ |
1da177e4 LT |
79 | memcpy (HDATA(instance)->dma_bounce_buffer, |
80 | cmd->SCp.ptr, cmd->SCp.this_residual); | |
1da177e4 LT |
81 | } |
82 | } | |
83 | ||
84 | /* setup dma direction */ | |
85 | if (!dir_in) | |
86 | cntr |= CNTR_DDIR; | |
87 | ||
88 | /* remember direction */ | |
89 | HDATA(cmd->device->host)->dma_dir = dir_in; | |
90 | ||
91 | DMA(cmd->device->host)->CNTR = cntr; | |
92 | ||
93 | /* setup DMA *physical* address */ | |
94 | DMA(cmd->device->host)->ACR = addr; | |
95 | ||
96 | if (dir_in){ | |
97 | /* invalidate any cache */ | |
98 | cache_clear (addr, cmd->SCp.this_residual); | |
99 | }else{ | |
100 | /* push any dirty cache */ | |
101 | cache_push (addr, cmd->SCp.this_residual); | |
102 | } | |
103 | /* start DMA */ | |
104 | DMA(cmd->device->host)->ST_DMA = 1; | |
105 | ||
106 | /* return success */ | |
107 | return 0; | |
108 | } | |
109 | ||
65396410 | 110 | static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt, |
1da177e4 LT |
111 | int status) |
112 | { | |
113 | /* disable SCSI interrupts */ | |
114 | unsigned short cntr = CNTR_PDMD; | |
115 | ||
116 | if (!HDATA(instance)->dma_dir) | |
117 | cntr |= CNTR_DDIR; | |
118 | ||
119 | /* disable SCSI interrupts */ | |
120 | DMA(instance)->CNTR = cntr; | |
121 | ||
122 | /* flush if we were reading */ | |
123 | if (HDATA(instance)->dma_dir) { | |
124 | DMA(instance)->FLUSH = 1; | |
125 | while (!(DMA(instance)->ISTR & ISTR_FE_FLG)) | |
126 | ; | |
127 | } | |
128 | ||
129 | /* clear a possible interrupt */ | |
130 | DMA(instance)->CINT = 1; | |
131 | ||
132 | /* stop DMA */ | |
133 | DMA(instance)->SP_DMA = 1; | |
134 | ||
135 | /* restore the CONTROL bits (minus the direction flag) */ | |
136 | DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN; | |
137 | ||
138 | /* copy from a bounce buffer, if necessary */ | |
139 | if (status && HDATA(instance)->dma_bounce_buffer) { | |
f2c1afa5 | 140 | if( HDATA(instance)->dma_dir ) |
1da177e4 LT |
141 | memcpy (SCpnt->SCp.ptr, |
142 | HDATA(instance)->dma_bounce_buffer, | |
143 | SCpnt->SCp.this_residual); | |
f2c1afa5 BH |
144 | kfree (HDATA(instance)->dma_bounce_buffer); |
145 | HDATA(instance)->dma_bounce_buffer = NULL; | |
146 | HDATA(instance)->dma_bounce_len = 0; | |
1da177e4 LT |
147 | } |
148 | } | |
149 | ||
5880f486 | 150 | static int __init a2091_detect(struct scsi_host_template *tpnt) |
1da177e4 LT |
151 | { |
152 | static unsigned char called = 0; | |
153 | struct Scsi_Host *instance; | |
154 | unsigned long address; | |
155 | struct zorro_dev *z = NULL; | |
156 | wd33c93_regs regs; | |
157 | int num_a2091 = 0; | |
158 | ||
159 | if (!MACH_IS_AMIGA || called) | |
160 | return 0; | |
161 | called = 1; | |
162 | ||
163 | tpnt->proc_name = "A2091"; | |
164 | tpnt->proc_info = &wd33c93_proc_info; | |
165 | ||
166 | while ((z = zorro_find_device(ZORRO_WILDCARD, z))) { | |
167 | if (z->id != ZORRO_PROD_CBM_A590_A2091_1 && | |
168 | z->id != ZORRO_PROD_CBM_A590_A2091_2) | |
169 | continue; | |
170 | address = z->resource.start; | |
171 | if (!request_mem_region(address, 256, "wd33c93")) | |
172 | continue; | |
173 | ||
174 | instance = scsi_register (tpnt, sizeof (struct WD33C93_hostdata)); | |
d38f47a9 GU |
175 | if (instance == NULL) |
176 | goto release; | |
1da177e4 LT |
177 | instance->base = ZTWO_VADDR(address); |
178 | instance->irq = IRQ_AMIGA_PORTS; | |
179 | instance->unique_id = z->slotaddr; | |
180 | DMA(instance)->DAWR = DAWR_A2091; | |
181 | regs.SASR = &(DMA(instance)->SASR); | |
182 | regs.SCMD = &(DMA(instance)->SCMD); | |
a579dab1 JB |
183 | HDATA(instance)->no_sync = 0xff; |
184 | HDATA(instance)->fast = 0; | |
185 | HDATA(instance)->dma_mode = CTRL_DMA; | |
1da177e4 | 186 | wd33c93_init(instance, regs, dma_setup, dma_stop, WD33C93_FS_8_10); |
d38f47a9 GU |
187 | if (request_irq(IRQ_AMIGA_PORTS, a2091_intr, IRQF_SHARED, "A2091 SCSI", |
188 | instance)) | |
189 | goto unregister; | |
1da177e4 LT |
190 | DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN; |
191 | num_a2091++; | |
d38f47a9 GU |
192 | continue; |
193 | ||
194 | unregister: | |
195 | scsi_unregister(instance); | |
d38f47a9 GU |
196 | release: |
197 | release_mem_region(address, 256); | |
1da177e4 LT |
198 | } |
199 | ||
200 | return num_a2091; | |
201 | } | |
202 | ||
65396410 | 203 | static int a2091_bus_reset(struct scsi_cmnd *cmd) |
1da177e4 LT |
204 | { |
205 | /* FIXME perform bus-specific reset */ | |
68b3aa7c | 206 | |
df0ae249 JG |
207 | /* FIXME 2: kill this function, and let midlayer fall back |
208 | to the same action, calling wd33c93_host_reset() */ | |
209 | ||
68b3aa7c | 210 | spin_lock_irq(cmd->device->host->host_lock); |
1da177e4 | 211 | wd33c93_host_reset(cmd); |
68b3aa7c JG |
212 | spin_unlock_irq(cmd->device->host->host_lock); |
213 | ||
1da177e4 LT |
214 | return SUCCESS; |
215 | } | |
216 | ||
217 | #define HOSTS_C | |
218 | ||
d0be4a7d | 219 | static struct scsi_host_template driver_template = { |
1da177e4 LT |
220 | .proc_name = "A2901", |
221 | .name = "Commodore A2091/A590 SCSI", | |
222 | .detect = a2091_detect, | |
223 | .release = a2091_release, | |
224 | .queuecommand = wd33c93_queuecommand, | |
225 | .eh_abort_handler = wd33c93_abort, | |
226 | .eh_bus_reset_handler = a2091_bus_reset, | |
227 | .eh_host_reset_handler = wd33c93_host_reset, | |
228 | .can_queue = CAN_QUEUE, | |
229 | .this_id = 7, | |
230 | .sg_tablesize = SG_ALL, | |
231 | .cmd_per_lun = CMD_PER_LUN, | |
232 | .use_clustering = DISABLE_CLUSTERING | |
233 | }; | |
234 | ||
235 | ||
236 | #include "scsi_module.c" | |
237 | ||
5880f486 | 238 | static int a2091_release(struct Scsi_Host *instance) |
1da177e4 LT |
239 | { |
240 | #ifdef MODULE | |
241 | DMA(instance)->CNTR = 0; | |
242 | release_mem_region(ZTWO_PADDR(instance->base), 256); | |
243 | free_irq(IRQ_AMIGA_PORTS, instance); | |
1da177e4 LT |
244 | #endif |
245 | return 1; | |
246 | } | |
247 | ||
248 | MODULE_LICENSE("GPL"); |