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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->show_info = wd33c93_show_info,
80 tpnt->write_info = wd33c93_write_info,
81
82 instance = scsi_register(tpnt, sizeof(struct WD33C93_hostdata));
83 if (!instance)
84 goto err_out;
85
86 instance->base = 0xfffe4000;
87 instance->irq = MVME147_IRQ_SCSI_PORT;
88 regs.SASR = (volatile unsigned char *)0xfffe4000;
89 regs.SCMD = (volatile unsigned char *)0xfffe4001;
90 hdata = shost_priv(instance);
91 hdata->no_sync = 0xff;
92 hdata->fast = 0;
93 hdata->dma_mode = CTRL_DMA;
94 wd33c93_init(instance, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
95
96 if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0,
97 "MVME147 SCSI PORT", instance))
98 goto err_unregister;
99 if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0,
100 "MVME147 SCSI DMA", instance))
101 goto err_free_irq;
102#if 0 /* Disabled; causes problems booting */
103 m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
104 udelay(100);
105 m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
106 udelay(2000);
107 m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
108#endif
109 m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
110
111 m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
112 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
113
114 return 1;
115
116err_free_irq:
117 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
118err_unregister:
119 scsi_unregister(instance);
120err_out:
121 return 0;
122}
123
124static int mvme147_bus_reset(struct scsi_cmnd *cmd)
125{
126 /* FIXME perform bus-specific reset */
127
128 /* FIXME 2: kill this function, and let midlayer fallback to
129 the same result, calling wd33c93_host_reset() */
130
131 spin_lock_irq(cmd->device->host->host_lock);
132 wd33c93_host_reset(cmd);
133 spin_unlock_irq(cmd->device->host->host_lock);
134
135 return SUCCESS;
136}
137
138
139static struct scsi_host_template driver_template = {
140 .proc_name = "MVME147",
141 .name = "MVME147 built-in SCSI",
142 .detect = mvme147_detect,
143 .release = mvme147_release,
144 .queuecommand = wd33c93_queuecommand,
145 .eh_abort_handler = wd33c93_abort,
146 .eh_bus_reset_handler = mvme147_bus_reset,
147 .eh_host_reset_handler = wd33c93_host_reset,
148 .can_queue = CAN_QUEUE,
149 .this_id = 7,
150 .sg_tablesize = SG_ALL,
151 .cmd_per_lun = CMD_PER_LUN,
152 .use_clustering = ENABLE_CLUSTERING
153};
154
155
156#include "scsi_module.c"
157
158int mvme147_release(struct Scsi_Host *instance)
159{
160#ifdef MODULE
161 /* XXX Make sure DMA is stopped! */
162 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
163 free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);
164#endif
165 return 1;
166}
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};
82
83static struct Scsi_Host *mvme147_shost;
84
85static int __init mvme147_init(void)
86{
87 wd33c93_regs regs;
88 struct WD33C93_hostdata *hdata;
89 int error = -ENOMEM;
90
91 if (!MACH_IS_MVME147)
92 return 0;
93
94 mvme147_shost = scsi_host_alloc(&mvme147_host_template,
95 sizeof(struct WD33C93_hostdata));
96 if (!mvme147_shost)
97 goto err_out;
98 mvme147_shost->base = 0xfffe4000;
99 mvme147_shost->irq = MVME147_IRQ_SCSI_PORT;
100
101 regs.SASR = (volatile unsigned char *)0xfffe4000;
102 regs.SCMD = (volatile unsigned char *)0xfffe4001;
103
104 hdata = shost_priv(mvme147_shost);
105 hdata->no_sync = 0xff;
106 hdata->fast = 0;
107 hdata->dma_mode = CTRL_DMA;
108
109 wd33c93_init(mvme147_shost, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
110
111 error = request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0,
112 "MVME147 SCSI PORT", mvme147_shost);
113 if (error)
114 goto err_unregister;
115 error = request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0,
116 "MVME147 SCSI DMA", mvme147_shost);
117 if (error)
118 goto err_free_irq;
119#if 0 /* Disabled; causes problems booting */
120 m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
121 udelay(100);
122 m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
123 udelay(2000);
124 m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
125#endif
126 m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
127
128 m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
129 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
130
131 error = scsi_add_host(mvme147_shost, NULL);
132 if (error)
133 goto err_free_irq;
134 scsi_scan_host(mvme147_shost);
135 return 0;
136
137err_free_irq:
138 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_shost);
139err_unregister:
140 scsi_host_put(mvme147_shost);
141err_out:
142 return error;
143}
144
145static void __exit mvme147_exit(void)
146{
147 scsi_remove_host(mvme147_shost);
148
149 /* XXX Make sure DMA is stopped! */
150 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_shost);
151 free_irq(MVME147_IRQ_SCSI_DMA, mvme147_shost);
152
153 scsi_host_put(mvme147_shost);
154}
155
156module_init(mvme147_init);
157module_exit(mvme147_exit);