Commit | Line | Data |
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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> | |
5 | #include <linux/version.h> | |
6 | #include <linux/interrupt.h> | |
7 | ||
8 | #include <asm/page.h> | |
9 | #include <asm/pgtable.h> | |
10 | #include <asm/mvme147hw.h> | |
11 | #include <asm/irq.h> | |
12 | ||
13 | #include "scsi.h" | |
14 | #include <scsi/scsi_host.h> | |
15 | #include "wd33c93.h" | |
16 | #include "mvme147.h" | |
17 | ||
18 | #include<linux/stat.h> | |
19 | ||
20 | #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata)) | |
21 | ||
22 | static struct Scsi_Host *mvme147_host = NULL; | |
23 | ||
24 | static irqreturn_t mvme147_intr (int irq, void *dummy, struct pt_regs *fp) | |
25 | { | |
26 | if (irq == MVME147_IRQ_SCSI_PORT) | |
27 | wd33c93_intr (mvme147_host); | |
28 | else | |
29 | m147_pcc->dma_intr = 0x89; /* Ack and enable ints */ | |
30 | return IRQ_HANDLED; | |
31 | } | |
32 | ||
33 | static int dma_setup (Scsi_Cmnd *cmd, int dir_in) | |
34 | { | |
35 | unsigned char flags = 0x01; | |
36 | unsigned long addr = virt_to_bus(cmd->SCp.ptr); | |
37 | ||
38 | /* setup dma direction */ | |
39 | if (!dir_in) | |
40 | flags |= 0x04; | |
41 | ||
42 | /* remember direction */ | |
43 | HDATA(mvme147_host)->dma_dir = dir_in; | |
44 | ||
45 | if (dir_in) | |
46 | /* invalidate any cache */ | |
47 | cache_clear (addr, cmd->SCp.this_residual); | |
48 | else | |
49 | /* push any dirty cache */ | |
50 | cache_push (addr, cmd->SCp.this_residual); | |
51 | ||
52 | /* start DMA */ | |
53 | m147_pcc->dma_bcr = cmd->SCp.this_residual | (1<<24); | |
54 | m147_pcc->dma_dadr = addr; | |
55 | m147_pcc->dma_cntrl = flags; | |
56 | ||
57 | /* return success */ | |
58 | return 0; | |
59 | } | |
60 | ||
61 | static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt, | |
62 | int status) | |
63 | { | |
64 | m147_pcc->dma_cntrl = 0; | |
65 | } | |
66 | ||
67 | int mvme147_detect(Scsi_Host_Template *tpnt) | |
68 | { | |
69 | static unsigned char called = 0; | |
70 | wd33c93_regs regs; | |
71 | ||
72 | if (!MACH_IS_MVME147 || called) | |
73 | return 0; | |
74 | called++; | |
75 | ||
76 | tpnt->proc_name = "MVME147"; | |
77 | tpnt->proc_info = &wd33c93_proc_info; | |
78 | ||
79 | mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata)); | |
80 | if (!mvme147_host) | |
81 | goto err_out; | |
82 | ||
83 | mvme147_host->base = 0xfffe4000; | |
84 | mvme147_host->irq = MVME147_IRQ_SCSI_PORT; | |
85 | regs.SASR = (volatile unsigned char *)0xfffe4000; | |
86 | regs.SCMD = (volatile unsigned char *)0xfffe4001; | |
87 | wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10); | |
88 | ||
89 | if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr)) | |
90 | goto err_unregister; | |
91 | if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr)) | |
92 | goto err_free_irq; | |
93 | #if 0 /* Disabled; causes problems booting */ | |
94 | m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */ | |
95 | udelay(100); | |
96 | m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */ | |
97 | udelay(2000); | |
98 | m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */ | |
99 | #endif | |
100 | m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */ | |
101 | ||
102 | m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */ | |
103 | m147_pcc->dma_intr = 0x89; /* Ack and enable ints */ | |
104 | ||
105 | return 1; | |
106 | ||
107 | err_free_irq: | |
108 | free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr); | |
109 | err_unregister: | |
110 | wd33c93_release(); | |
111 | scsi_unregister(mvme147_host); | |
112 | err_out: | |
113 | return 0; | |
114 | } | |
115 | ||
116 | static int mvme147_bus_reset(Scsi_Cmnd *cmd) | |
117 | { | |
118 | /* FIXME perform bus-specific reset */ | |
68b3aa7c | 119 | |
df0ae249 JG |
120 | /* FIXME 2: kill this function, and let midlayer fallback to |
121 | the same result, calling wd33c93_host_reset() */ | |
122 | ||
68b3aa7c | 123 | spin_lock_irq(cmd->device->host->host_lock); |
1da177e4 | 124 | wd33c93_host_reset(cmd); |
68b3aa7c JG |
125 | spin_unlock_irq(cmd->device->host->host_lock); |
126 | ||
1da177e4 LT |
127 | return SUCCESS; |
128 | } | |
129 | ||
130 | #define HOSTS_C | |
131 | ||
132 | #include "mvme147.h" | |
133 | ||
134 | static Scsi_Host_Template driver_template = { | |
135 | .proc_name = "MVME147", | |
136 | .name = "MVME147 built-in SCSI", | |
137 | .detect = mvme147_detect, | |
138 | .release = mvme147_release, | |
139 | .queuecommand = wd33c93_queuecommand, | |
140 | .eh_abort_handler = wd33c93_abort, | |
141 | .eh_bus_reset_handler = mvme147_bus_reset, | |
142 | .eh_host_reset_handler = wd33c93_host_reset, | |
143 | .can_queue = CAN_QUEUE, | |
144 | .this_id = 7, | |
145 | .sg_tablesize = SG_ALL, | |
146 | .cmd_per_lun = CMD_PER_LUN, | |
147 | .use_clustering = ENABLE_CLUSTERING | |
148 | }; | |
149 | ||
150 | ||
151 | #include "scsi_module.c" | |
152 | ||
153 | int mvme147_release(struct Scsi_Host *instance) | |
154 | { | |
155 | #ifdef MODULE | |
156 | /* XXX Make sure DMA is stopped! */ | |
157 | wd33c93_release(); | |
158 | free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr); | |
159 | free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr); | |
160 | #endif | |
161 | return 1; | |
162 | } |