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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 | ||
7d12e780 | 26 | static irqreturn_t a2091_intr (int irq, void *_instance) |
1da177e4 LT |
27 | { |
28 | unsigned long flags; | |
29 | unsigned int status; | |
30 | struct Scsi_Host *instance = (struct Scsi_Host *)_instance; | |
31 | ||
32 | status = DMA(instance)->ISTR; | |
33 | if (!(status & (ISTR_INT_F|ISTR_INT_P)) || !(status & ISTR_INTS)) | |
34 | return IRQ_NONE; | |
35 | ||
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 | ||
65396410 | 42 | static int dma_setup(struct scsi_cmnd *cmd, int dir_in) |
1da177e4 LT |
43 | { |
44 | unsigned short cntr = CNTR_PDMD | CNTR_INTEN; | |
45 | unsigned long addr = virt_to_bus(cmd->SCp.ptr); | |
46 | struct Scsi_Host *instance = cmd->device->host; | |
47 | ||
48 | /* don't allow DMA if the physical address is bad */ | |
49 | if (addr & A2091_XFER_MASK || | |
50 | (!dir_in && mm_end_of_chunk (addr, cmd->SCp.this_residual))) | |
51 | { | |
52 | HDATA(instance)->dma_bounce_len = (cmd->SCp.this_residual + 511) | |
53 | & ~0x1ff; | |
54 | HDATA(instance)->dma_bounce_buffer = | |
55 | kmalloc (HDATA(instance)->dma_bounce_len, GFP_KERNEL); | |
56 | ||
57 | /* can't allocate memory; use PIO */ | |
58 | if (!HDATA(instance)->dma_bounce_buffer) { | |
59 | HDATA(instance)->dma_bounce_len = 0; | |
60 | return 1; | |
61 | } | |
62 | ||
63 | /* get the physical address of the bounce buffer */ | |
64 | addr = virt_to_bus(HDATA(instance)->dma_bounce_buffer); | |
65 | ||
66 | /* the bounce buffer may not be in the first 16M of physmem */ | |
67 | if (addr & A2091_XFER_MASK) { | |
68 | /* we could use chipmem... maybe later */ | |
69 | kfree (HDATA(instance)->dma_bounce_buffer); | |
70 | HDATA(instance)->dma_bounce_buffer = NULL; | |
71 | HDATA(instance)->dma_bounce_len = 0; | |
72 | return 1; | |
73 | } | |
74 | ||
75 | if (!dir_in) { | |
f2c1afa5 | 76 | /* copy to bounce buffer for a write */ |
1da177e4 LT |
77 | memcpy (HDATA(instance)->dma_bounce_buffer, |
78 | cmd->SCp.ptr, cmd->SCp.this_residual); | |
1da177e4 LT |
79 | } |
80 | } | |
81 | ||
82 | /* setup dma direction */ | |
83 | if (!dir_in) | |
84 | cntr |= CNTR_DDIR; | |
85 | ||
86 | /* remember direction */ | |
87 | HDATA(cmd->device->host)->dma_dir = dir_in; | |
88 | ||
89 | DMA(cmd->device->host)->CNTR = cntr; | |
90 | ||
91 | /* setup DMA *physical* address */ | |
92 | DMA(cmd->device->host)->ACR = addr; | |
93 | ||
94 | if (dir_in){ | |
95 | /* invalidate any cache */ | |
96 | cache_clear (addr, cmd->SCp.this_residual); | |
97 | }else{ | |
98 | /* push any dirty cache */ | |
99 | cache_push (addr, cmd->SCp.this_residual); | |
100 | } | |
101 | /* start DMA */ | |
102 | DMA(cmd->device->host)->ST_DMA = 1; | |
103 | ||
104 | /* return success */ | |
105 | return 0; | |
106 | } | |
107 | ||
65396410 | 108 | static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt, |
1da177e4 LT |
109 | int status) |
110 | { | |
111 | /* disable SCSI interrupts */ | |
112 | unsigned short cntr = CNTR_PDMD; | |
113 | ||
114 | if (!HDATA(instance)->dma_dir) | |
115 | cntr |= CNTR_DDIR; | |
116 | ||
117 | /* disable SCSI interrupts */ | |
118 | DMA(instance)->CNTR = cntr; | |
119 | ||
120 | /* flush if we were reading */ | |
121 | if (HDATA(instance)->dma_dir) { | |
122 | DMA(instance)->FLUSH = 1; | |
123 | while (!(DMA(instance)->ISTR & ISTR_FE_FLG)) | |
124 | ; | |
125 | } | |
126 | ||
127 | /* clear a possible interrupt */ | |
128 | DMA(instance)->CINT = 1; | |
129 | ||
130 | /* stop DMA */ | |
131 | DMA(instance)->SP_DMA = 1; | |
132 | ||
133 | /* restore the CONTROL bits (minus the direction flag) */ | |
134 | DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN; | |
135 | ||
136 | /* copy from a bounce buffer, if necessary */ | |
137 | if (status && HDATA(instance)->dma_bounce_buffer) { | |
f2c1afa5 | 138 | if( HDATA(instance)->dma_dir ) |
1da177e4 LT |
139 | memcpy (SCpnt->SCp.ptr, |
140 | HDATA(instance)->dma_bounce_buffer, | |
141 | SCpnt->SCp.this_residual); | |
f2c1afa5 BH |
142 | kfree (HDATA(instance)->dma_bounce_buffer); |
143 | HDATA(instance)->dma_bounce_buffer = NULL; | |
144 | HDATA(instance)->dma_bounce_len = 0; | |
1da177e4 LT |
145 | } |
146 | } | |
147 | ||
d0be4a7d | 148 | int __init a2091_detect(struct scsi_host_template *tpnt) |
1da177e4 LT |
149 | { |
150 | static unsigned char called = 0; | |
151 | struct Scsi_Host *instance; | |
152 | unsigned long address; | |
153 | struct zorro_dev *z = NULL; | |
154 | wd33c93_regs regs; | |
155 | int num_a2091 = 0; | |
156 | ||
157 | if (!MACH_IS_AMIGA || called) | |
158 | return 0; | |
159 | called = 1; | |
160 | ||
161 | tpnt->proc_name = "A2091"; | |
162 | tpnt->proc_info = &wd33c93_proc_info; | |
163 | ||
164 | while ((z = zorro_find_device(ZORRO_WILDCARD, z))) { | |
165 | if (z->id != ZORRO_PROD_CBM_A590_A2091_1 && | |
166 | z->id != ZORRO_PROD_CBM_A590_A2091_2) | |
167 | continue; | |
168 | address = z->resource.start; | |
169 | if (!request_mem_region(address, 256, "wd33c93")) | |
170 | continue; | |
171 | ||
172 | instance = scsi_register (tpnt, sizeof (struct WD33C93_hostdata)); | |
173 | if (instance == NULL) { | |
174 | release_mem_region(address, 256); | |
175 | continue; | |
176 | } | |
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); | |
183 | wd33c93_init(instance, regs, dma_setup, dma_stop, WD33C93_FS_8_10); | |
1d6f359a | 184 | request_irq(IRQ_AMIGA_PORTS, a2091_intr, IRQF_SHARED, "A2091 SCSI", |
1da177e4 LT |
185 | instance); |
186 | DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN; | |
187 | num_a2091++; | |
188 | } | |
189 | ||
190 | return num_a2091; | |
191 | } | |
192 | ||
65396410 | 193 | static int a2091_bus_reset(struct scsi_cmnd *cmd) |
1da177e4 LT |
194 | { |
195 | /* FIXME perform bus-specific reset */ | |
68b3aa7c | 196 | |
df0ae249 JG |
197 | /* FIXME 2: kill this function, and let midlayer fall back |
198 | to the same action, calling wd33c93_host_reset() */ | |
199 | ||
68b3aa7c | 200 | spin_lock_irq(cmd->device->host->host_lock); |
1da177e4 | 201 | wd33c93_host_reset(cmd); |
68b3aa7c JG |
202 | spin_unlock_irq(cmd->device->host->host_lock); |
203 | ||
1da177e4 LT |
204 | return SUCCESS; |
205 | } | |
206 | ||
207 | #define HOSTS_C | |
208 | ||
d0be4a7d | 209 | static struct scsi_host_template driver_template = { |
1da177e4 LT |
210 | .proc_name = "A2901", |
211 | .name = "Commodore A2091/A590 SCSI", | |
212 | .detect = a2091_detect, | |
213 | .release = a2091_release, | |
214 | .queuecommand = wd33c93_queuecommand, | |
215 | .eh_abort_handler = wd33c93_abort, | |
216 | .eh_bus_reset_handler = a2091_bus_reset, | |
217 | .eh_host_reset_handler = wd33c93_host_reset, | |
218 | .can_queue = CAN_QUEUE, | |
219 | .this_id = 7, | |
220 | .sg_tablesize = SG_ALL, | |
221 | .cmd_per_lun = CMD_PER_LUN, | |
222 | .use_clustering = DISABLE_CLUSTERING | |
223 | }; | |
224 | ||
225 | ||
226 | #include "scsi_module.c" | |
227 | ||
228 | int a2091_release(struct Scsi_Host *instance) | |
229 | { | |
230 | #ifdef MODULE | |
231 | DMA(instance)->CNTR = 0; | |
232 | release_mem_region(ZTWO_PADDR(instance->base), 256); | |
233 | free_irq(IRQ_AMIGA_PORTS, instance); | |
234 | wd33c93_release(); | |
235 | #endif | |
236 | return 1; | |
237 | } | |
238 | ||
239 | MODULE_LICENSE("GPL"); |