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1da177e4 LT |
1 | #include <linux/types.h> |
2 | #include <linux/mm.h> | |
3 | #include <linux/blkdev.h> | |
4 | #include <linux/sched.h> | |
1da177e4 LT |
5 | #include <linux/interrupt.h> |
6 | ||
7 | #include <asm/page.h> | |
8 | #include <asm/pgtable.h> | |
9 | #include <asm/mvme147hw.h> | |
10 | #include <asm/irq.h> | |
11 | ||
12 | #include "scsi.h" | |
13 | #include <scsi/scsi_host.h> | |
14 | #include "wd33c93.h" | |
15 | #include "mvme147.h" | |
16 | ||
17 | #include<linux/stat.h> | |
18 | ||
19 | #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata)) | |
20 | ||
21 | static struct Scsi_Host *mvme147_host = NULL; | |
22 | ||
7d12e780 | 23 | static irqreturn_t mvme147_intr (int irq, void *dummy) |
1da177e4 LT |
24 | { |
25 | if (irq == MVME147_IRQ_SCSI_PORT) | |
26 | wd33c93_intr (mvme147_host); | |
27 | else | |
28 | m147_pcc->dma_intr = 0x89; /* Ack and enable ints */ | |
29 | return IRQ_HANDLED; | |
30 | } | |
31 | ||
65396410 | 32 | static int dma_setup(struct scsi_cmnd *cmd, int dir_in) |
1da177e4 LT |
33 | { |
34 | unsigned char flags = 0x01; | |
35 | unsigned long addr = virt_to_bus(cmd->SCp.ptr); | |
36 | ||
37 | /* setup dma direction */ | |
38 | if (!dir_in) | |
39 | flags |= 0x04; | |
40 | ||
41 | /* remember direction */ | |
42 | HDATA(mvme147_host)->dma_dir = dir_in; | |
43 | ||
44 | if (dir_in) | |
45 | /* invalidate any cache */ | |
46 | cache_clear (addr, cmd->SCp.this_residual); | |
47 | else | |
48 | /* push any dirty cache */ | |
49 | cache_push (addr, cmd->SCp.this_residual); | |
50 | ||
51 | /* start DMA */ | |
52 | m147_pcc->dma_bcr = cmd->SCp.this_residual | (1<<24); | |
53 | m147_pcc->dma_dadr = addr; | |
54 | m147_pcc->dma_cntrl = flags; | |
55 | ||
56 | /* return success */ | |
57 | return 0; | |
58 | } | |
59 | ||
65396410 | 60 | static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt, |
1da177e4 LT |
61 | int status) |
62 | { | |
63 | m147_pcc->dma_cntrl = 0; | |
64 | } | |
65 | ||
d0be4a7d | 66 | int mvme147_detect(struct scsi_host_template *tpnt) |
1da177e4 LT |
67 | { |
68 | static unsigned char called = 0; | |
69 | wd33c93_regs regs; | |
70 | ||
71 | if (!MACH_IS_MVME147 || called) | |
72 | return 0; | |
73 | called++; | |
74 | ||
75 | tpnt->proc_name = "MVME147"; | |
76 | tpnt->proc_info = &wd33c93_proc_info; | |
77 | ||
78 | mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata)); | |
79 | if (!mvme147_host) | |
80 | goto err_out; | |
81 | ||
82 | mvme147_host->base = 0xfffe4000; | |
83 | mvme147_host->irq = MVME147_IRQ_SCSI_PORT; | |
84 | regs.SASR = (volatile unsigned char *)0xfffe4000; | |
85 | regs.SCMD = (volatile unsigned char *)0xfffe4001; | |
86 | wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10); | |
87 | ||
88 | if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr)) | |
89 | goto err_unregister; | |
90 | if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr)) | |
91 | goto err_free_irq; | |
92 | #if 0 /* Disabled; causes problems booting */ | |
93 | m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */ | |
94 | udelay(100); | |
95 | m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */ | |
96 | udelay(2000); | |
97 | m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */ | |
98 | #endif | |
99 | m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */ | |
100 | ||
101 | m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */ | |
102 | m147_pcc->dma_intr = 0x89; /* Ack and enable ints */ | |
103 | ||
104 | return 1; | |
105 | ||
106 | err_free_irq: | |
107 | free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr); | |
108 | err_unregister: | |
109 | wd33c93_release(); | |
110 | scsi_unregister(mvme147_host); | |
111 | err_out: | |
112 | return 0; | |
113 | } | |
114 | ||
65396410 | 115 | static int mvme147_bus_reset(struct scsi_cmnd *cmd) |
1da177e4 LT |
116 | { |
117 | /* FIXME perform bus-specific reset */ | |
68b3aa7c | 118 | |
df0ae249 JG |
119 | /* FIXME 2: kill this function, and let midlayer fallback to |
120 | the same result, calling wd33c93_host_reset() */ | |
121 | ||
68b3aa7c | 122 | spin_lock_irq(cmd->device->host->host_lock); |
1da177e4 | 123 | wd33c93_host_reset(cmd); |
68b3aa7c JG |
124 | spin_unlock_irq(cmd->device->host->host_lock); |
125 | ||
1da177e4 LT |
126 | return SUCCESS; |
127 | } | |
128 | ||
129 | #define HOSTS_C | |
130 | ||
131 | #include "mvme147.h" | |
132 | ||
d0be4a7d | 133 | static struct scsi_host_template driver_template = { |
1da177e4 LT |
134 | .proc_name = "MVME147", |
135 | .name = "MVME147 built-in SCSI", | |
136 | .detect = mvme147_detect, | |
137 | .release = mvme147_release, | |
138 | .queuecommand = wd33c93_queuecommand, | |
139 | .eh_abort_handler = wd33c93_abort, | |
140 | .eh_bus_reset_handler = mvme147_bus_reset, | |
141 | .eh_host_reset_handler = wd33c93_host_reset, | |
142 | .can_queue = CAN_QUEUE, | |
143 | .this_id = 7, | |
144 | .sg_tablesize = SG_ALL, | |
145 | .cmd_per_lun = CMD_PER_LUN, | |
146 | .use_clustering = ENABLE_CLUSTERING | |
147 | }; | |
148 | ||
149 | ||
150 | #include "scsi_module.c" | |
151 | ||
152 | int mvme147_release(struct Scsi_Host *instance) | |
153 | { | |
154 | #ifdef MODULE | |
155 | /* XXX Make sure DMA is stopped! */ | |
156 | wd33c93_release(); | |
157 | free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr); | |
158 | free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr); | |
159 | #endif | |
160 | return 1; | |
161 | } |