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1da177e4 LT |
1 | #include <linux/types.h> |
2 | #include <linux/mm.h> | |
3 | #include <linux/blkdev.h> | |
1da177e4 LT |
4 | #include <linux/init.h> |
5 | #include <linux/interrupt.h> | |
6 | ||
7 | #include <asm/setup.h> | |
8 | #include <asm/page.h> | |
9 | #include <asm/pgtable.h> | |
10 | #include <asm/amigaints.h> | |
11 | #include <asm/amigahw.h> | |
12 | #include <linux/zorro.h> | |
13 | #include <asm/irq.h> | |
14 | #include <linux/spinlock.h> | |
15 | ||
16 | #include "scsi.h" | |
17 | #include <scsi/scsi_host.h> | |
18 | #include "wd33c93.h" | |
19 | #include "a2091.h" | |
20 | ||
21 | #include<linux/stat.h> | |
22 | ||
23 | #define DMA(ptr) ((a2091_scsiregs *)((ptr)->base)) | |
24 | #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata)) | |
25 | ||
5880f486 AB |
26 | static int a2091_release(struct Scsi_Host *instance); |
27 | ||
7d12e780 | 28 | static irqreturn_t a2091_intr (int irq, void *_instance) |
1da177e4 LT |
29 | { |
30 | unsigned long flags; | |
31 | unsigned int status; | |
32 | struct Scsi_Host *instance = (struct Scsi_Host *)_instance; | |
33 | ||
34 | status = DMA(instance)->ISTR; | |
35 | if (!(status & (ISTR_INT_F|ISTR_INT_P)) || !(status & ISTR_INTS)) | |
36 | return IRQ_NONE; | |
37 | ||
38 | spin_lock_irqsave(instance->host_lock, flags); | |
39 | wd33c93_intr(instance); | |
40 | spin_unlock_irqrestore(instance->host_lock, flags); | |
41 | return IRQ_HANDLED; | |
42 | } | |
43 | ||
65396410 | 44 | static int dma_setup(struct scsi_cmnd *cmd, int dir_in) |
1da177e4 LT |
45 | { |
46 | unsigned short cntr = CNTR_PDMD | CNTR_INTEN; | |
47 | unsigned long addr = virt_to_bus(cmd->SCp.ptr); | |
48 | struct Scsi_Host *instance = cmd->device->host; | |
49 | ||
50 | /* don't allow DMA if the physical address is bad */ | |
7b892806 | 51 | if (addr & A2091_XFER_MASK) |
1da177e4 LT |
52 | { |
53 | HDATA(instance)->dma_bounce_len = (cmd->SCp.this_residual + 511) | |
54 | & ~0x1ff; | |
55 | HDATA(instance)->dma_bounce_buffer = | |
56 | kmalloc (HDATA(instance)->dma_bounce_len, GFP_KERNEL); | |
57 | ||
58 | /* can't allocate memory; use PIO */ | |
59 | if (!HDATA(instance)->dma_bounce_buffer) { | |
60 | HDATA(instance)->dma_bounce_len = 0; | |
61 | return 1; | |
62 | } | |
63 | ||
64 | /* get the physical address of the bounce buffer */ | |
65 | addr = virt_to_bus(HDATA(instance)->dma_bounce_buffer); | |
66 | ||
67 | /* the bounce buffer may not be in the first 16M of physmem */ | |
68 | if (addr & A2091_XFER_MASK) { | |
69 | /* we could use chipmem... maybe later */ | |
70 | kfree (HDATA(instance)->dma_bounce_buffer); | |
71 | HDATA(instance)->dma_bounce_buffer = NULL; | |
72 | HDATA(instance)->dma_bounce_len = 0; | |
73 | return 1; | |
74 | } | |
75 | ||
76 | if (!dir_in) { | |
f2c1afa5 | 77 | /* copy to bounce buffer for a write */ |
1da177e4 LT |
78 | memcpy (HDATA(instance)->dma_bounce_buffer, |
79 | cmd->SCp.ptr, cmd->SCp.this_residual); | |
1da177e4 LT |
80 | } |
81 | } | |
82 | ||
83 | /* setup dma direction */ | |
84 | if (!dir_in) | |
85 | cntr |= CNTR_DDIR; | |
86 | ||
87 | /* remember direction */ | |
88 | HDATA(cmd->device->host)->dma_dir = dir_in; | |
89 | ||
90 | DMA(cmd->device->host)->CNTR = cntr; | |
91 | ||
92 | /* setup DMA *physical* address */ | |
93 | DMA(cmd->device->host)->ACR = addr; | |
94 | ||
95 | if (dir_in){ | |
96 | /* invalidate any cache */ | |
97 | cache_clear (addr, cmd->SCp.this_residual); | |
98 | }else{ | |
99 | /* push any dirty cache */ | |
100 | cache_push (addr, cmd->SCp.this_residual); | |
101 | } | |
102 | /* start DMA */ | |
103 | DMA(cmd->device->host)->ST_DMA = 1; | |
104 | ||
105 | /* return success */ | |
106 | return 0; | |
107 | } | |
108 | ||
65396410 | 109 | static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt, |
1da177e4 LT |
110 | int status) |
111 | { | |
112 | /* disable SCSI interrupts */ | |
113 | unsigned short cntr = CNTR_PDMD; | |
114 | ||
115 | if (!HDATA(instance)->dma_dir) | |
116 | cntr |= CNTR_DDIR; | |
117 | ||
118 | /* disable SCSI interrupts */ | |
119 | DMA(instance)->CNTR = cntr; | |
120 | ||
121 | /* flush if we were reading */ | |
122 | if (HDATA(instance)->dma_dir) { | |
123 | DMA(instance)->FLUSH = 1; | |
124 | while (!(DMA(instance)->ISTR & ISTR_FE_FLG)) | |
125 | ; | |
126 | } | |
127 | ||
128 | /* clear a possible interrupt */ | |
129 | DMA(instance)->CINT = 1; | |
130 | ||
131 | /* stop DMA */ | |
132 | DMA(instance)->SP_DMA = 1; | |
133 | ||
134 | /* restore the CONTROL bits (minus the direction flag) */ | |
135 | DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN; | |
136 | ||
137 | /* copy from a bounce buffer, if necessary */ | |
138 | if (status && HDATA(instance)->dma_bounce_buffer) { | |
f2c1afa5 | 139 | if( HDATA(instance)->dma_dir ) |
1da177e4 LT |
140 | memcpy (SCpnt->SCp.ptr, |
141 | HDATA(instance)->dma_bounce_buffer, | |
142 | SCpnt->SCp.this_residual); | |
f2c1afa5 BH |
143 | kfree (HDATA(instance)->dma_bounce_buffer); |
144 | HDATA(instance)->dma_bounce_buffer = NULL; | |
145 | HDATA(instance)->dma_bounce_len = 0; | |
1da177e4 LT |
146 | } |
147 | } | |
148 | ||
5880f486 | 149 | static int __init a2091_detect(struct scsi_host_template *tpnt) |
1da177e4 LT |
150 | { |
151 | static unsigned char called = 0; | |
152 | struct Scsi_Host *instance; | |
153 | unsigned long address; | |
154 | struct zorro_dev *z = NULL; | |
155 | wd33c93_regs regs; | |
156 | int num_a2091 = 0; | |
157 | ||
158 | if (!MACH_IS_AMIGA || called) | |
159 | return 0; | |
160 | called = 1; | |
161 | ||
162 | tpnt->proc_name = "A2091"; | |
163 | tpnt->proc_info = &wd33c93_proc_info; | |
164 | ||
165 | while ((z = zorro_find_device(ZORRO_WILDCARD, z))) { | |
166 | if (z->id != ZORRO_PROD_CBM_A590_A2091_1 && | |
167 | z->id != ZORRO_PROD_CBM_A590_A2091_2) | |
168 | continue; | |
169 | address = z->resource.start; | |
170 | if (!request_mem_region(address, 256, "wd33c93")) | |
171 | continue; | |
172 | ||
173 | instance = scsi_register (tpnt, sizeof (struct WD33C93_hostdata)); | |
d38f47a9 GU |
174 | if (instance == NULL) |
175 | goto release; | |
1da177e4 LT |
176 | instance->base = ZTWO_VADDR(address); |
177 | instance->irq = IRQ_AMIGA_PORTS; | |
178 | instance->unique_id = z->slotaddr; | |
179 | DMA(instance)->DAWR = DAWR_A2091; | |
180 | regs.SASR = &(DMA(instance)->SASR); | |
181 | regs.SCMD = &(DMA(instance)->SCMD); | |
a579dab1 JB |
182 | HDATA(instance)->no_sync = 0xff; |
183 | HDATA(instance)->fast = 0; | |
184 | HDATA(instance)->dma_mode = CTRL_DMA; | |
1da177e4 | 185 | wd33c93_init(instance, regs, dma_setup, dma_stop, WD33C93_FS_8_10); |
d38f47a9 GU |
186 | if (request_irq(IRQ_AMIGA_PORTS, a2091_intr, IRQF_SHARED, "A2091 SCSI", |
187 | instance)) | |
188 | goto unregister; | |
1da177e4 LT |
189 | DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN; |
190 | num_a2091++; | |
d38f47a9 GU |
191 | continue; |
192 | ||
193 | unregister: | |
194 | scsi_unregister(instance); | |
195 | wd33c93_release(); | |
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); | |
244 | wd33c93_release(); | |
245 | #endif | |
246 | return 1; | |
247 | } | |
248 | ||
249 | MODULE_LICENSE("GPL"); |