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1#include <linux/types.h>
2#include <linux/mm.h>
3#include <linux/blkdev.h>
4#include <linux/interrupt.h>
5
6#include <asm/page.h>
7#include <asm/pgtable.h>
8#include <asm/mvme147hw.h>
9#include <asm/irq.h>
10
11#include "scsi.h"
12#include <scsi/scsi_host.h>
13#include "wd33c93.h"
14#include "mvme147.h"
15
16#include <linux/stat.h>
17
18
19static irqreturn_t mvme147_intr(int irq, void *data)
20{
21 struct Scsi_Host *instance = data;
22
23 if (irq == MVME147_IRQ_SCSI_PORT)
24 wd33c93_intr(instance);
25 else
26 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
27 return IRQ_HANDLED;
28}
29
30static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
31{
32 struct Scsi_Host *instance = cmd->device->host;
33 struct WD33C93_hostdata *hdata = shost_priv(instance);
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->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
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
61static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
62 int status)
63{
64 m147_pcc->dma_cntrl = 0;
65}
66
67int mvme147_detect(struct scsi_host_template *tpnt)
68{
69 static unsigned char called = 0;
70 struct Scsi_Host *instance;
71 wd33c93_regs regs;
72 struct WD33C93_hostdata *hdata;
73
74 if (!MACH_IS_MVME147 || called)
75 return 0;
76 called++;
77
78 tpnt->proc_name = "MVME147";
79 tpnt->proc_info = &wd33c93_proc_info;
80
81 instance = scsi_register(tpnt, sizeof(struct WD33C93_hostdata));
82 if (!instance)
83 goto err_out;
84
85 instance->base = 0xfffe4000;
86 instance->irq = MVME147_IRQ_SCSI_PORT;
87 regs.SASR = (volatile unsigned char *)0xfffe4000;
88 regs.SCMD = (volatile unsigned char *)0xfffe4001;
89 hdata = shost_priv(instance);
90 hdata->no_sync = 0xff;
91 hdata->fast = 0;
92 hdata->dma_mode = CTRL_DMA;
93 wd33c93_init(instance, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
94
95 if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0,
96 "MVME147 SCSI PORT", instance))
97 goto err_unregister;
98 if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0,
99 "MVME147 SCSI DMA", instance))
100 goto err_free_irq;
101#if 0 /* Disabled; causes problems booting */
102 m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
103 udelay(100);
104 m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
105 udelay(2000);
106 m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
107#endif
108 m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
109
110 m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
111 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
112
113 return 1;
114
115err_free_irq:
116 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
117err_unregister:
118 scsi_unregister(instance);
119err_out:
120 return 0;
121}
122
123static int mvme147_bus_reset(struct scsi_cmnd *cmd)
124{
125 /* FIXME perform bus-specific reset */
126
127 /* FIXME 2: kill this function, and let midlayer fallback to
128 the same result, calling wd33c93_host_reset() */
129
130 spin_lock_irq(cmd->device->host->host_lock);
131 wd33c93_host_reset(cmd);
132 spin_unlock_irq(cmd->device->host->host_lock);
133
134 return SUCCESS;
135}
136
137
138static struct scsi_host_template driver_template = {
139 .proc_name = "MVME147",
140 .name = "MVME147 built-in SCSI",
141 .detect = mvme147_detect,
142 .release = mvme147_release,
143 .queuecommand = wd33c93_queuecommand,
144 .eh_abort_handler = wd33c93_abort,
145 .eh_bus_reset_handler = mvme147_bus_reset,
146 .eh_host_reset_handler = wd33c93_host_reset,
147 .can_queue = CAN_QUEUE,
148 .this_id = 7,
149 .sg_tablesize = SG_ALL,
150 .cmd_per_lun = CMD_PER_LUN,
151 .use_clustering = ENABLE_CLUSTERING
152};
153
154
155#include "scsi_module.c"
156
157int mvme147_release(struct Scsi_Host *instance)
158{
159#ifdef MODULE
160 /* XXX Make sure DMA is stopped! */
161 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
162 free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);
163#endif
164 return 1;
165}
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/types.h>
3#include <linux/mm.h>
4#include <linux/blkdev.h>
5#include <linux/interrupt.h>
6#include <linux/init.h>
7#include <linux/kernel.h>
8#include <linux/module.h>
9
10#include <asm/page.h>
11#include <asm/pgtable.h>
12#include <asm/mvme147hw.h>
13#include <asm/irq.h>
14
15#include "scsi.h"
16#include <scsi/scsi_host.h>
17#include "wd33c93.h"
18#include "mvme147.h"
19
20static irqreturn_t mvme147_intr(int irq, void *data)
21{
22 struct Scsi_Host *instance = data;
23
24 if (irq == MVME147_IRQ_SCSI_PORT)
25 wd33c93_intr(instance);
26 else
27 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
28 return IRQ_HANDLED;
29}
30
31static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
32{
33 struct Scsi_Host *instance = cmd->device->host;
34 struct WD33C93_hostdata *hdata = shost_priv(instance);
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->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
53 /* start DMA */
54 m147_pcc->dma_bcr = cmd->SCp.this_residual | (1 << 24);
55 m147_pcc->dma_dadr = addr;
56 m147_pcc->dma_cntrl = flags;
57
58 /* return success */
59 return 0;
60}
61
62static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
63 int status)
64{
65 m147_pcc->dma_cntrl = 0;
66}
67
68static struct scsi_host_template mvme147_host_template = {
69 .module = THIS_MODULE,
70 .proc_name = "MVME147",
71 .name = "MVME147 built-in SCSI",
72 .queuecommand = wd33c93_queuecommand,
73 .eh_abort_handler = wd33c93_abort,
74 .eh_host_reset_handler = wd33c93_host_reset,
75 .show_info = wd33c93_show_info,
76 .write_info = wd33c93_write_info,
77 .can_queue = CAN_QUEUE,
78 .this_id = 7,
79 .sg_tablesize = SG_ALL,
80 .cmd_per_lun = CMD_PER_LUN,
81 .use_clustering = ENABLE_CLUSTERING
82};
83
84static struct Scsi_Host *mvme147_shost;
85
86static int __init mvme147_init(void)
87{
88 wd33c93_regs regs;
89 struct WD33C93_hostdata *hdata;
90 int error = -ENOMEM;
91
92 if (!MACH_IS_MVME147)
93 return 0;
94
95 mvme147_shost = scsi_host_alloc(&mvme147_host_template,
96 sizeof(struct WD33C93_hostdata));
97 if (!mvme147_shost)
98 goto err_out;
99 mvme147_shost->base = 0xfffe4000;
100 mvme147_shost->irq = MVME147_IRQ_SCSI_PORT;
101
102 regs.SASR = (volatile unsigned char *)0xfffe4000;
103 regs.SCMD = (volatile unsigned char *)0xfffe4001;
104
105 hdata = shost_priv(mvme147_shost);
106 hdata->no_sync = 0xff;
107 hdata->fast = 0;
108 hdata->dma_mode = CTRL_DMA;
109
110 wd33c93_init(mvme147_shost, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
111
112 error = request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0,
113 "MVME147 SCSI PORT", mvme147_shost);
114 if (error)
115 goto err_unregister;
116 error = request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0,
117 "MVME147 SCSI DMA", mvme147_shost);
118 if (error)
119 goto err_free_irq;
120#if 0 /* Disabled; causes problems booting */
121 m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
122 udelay(100);
123 m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
124 udelay(2000);
125 m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
126#endif
127 m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
128
129 m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
130 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
131
132 error = scsi_add_host(mvme147_shost, NULL);
133 if (error)
134 goto err_free_irq;
135 scsi_scan_host(mvme147_shost);
136 return 0;
137
138err_free_irq:
139 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_shost);
140err_unregister:
141 scsi_host_put(mvme147_shost);
142err_out:
143 return error;
144}
145
146static void __exit mvme147_exit(void)
147{
148 scsi_remove_host(mvme147_shost);
149
150 /* XXX Make sure DMA is stopped! */
151 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_shost);
152 free_irq(MVME147_IRQ_SCSI_DMA, mvme147_shost);
153
154 scsi_host_put(mvme147_shost);
155}
156
157module_init(mvme147_init);
158module_exit(mvme147_exit);