1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
// SPDX-License-Identifier: GPL-2.0
/*
* Amiga Gayle PATA controller driver
*
* Copyright (c) 2018 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Based on gayle.c:
*
* Created 12 Jul 1997 by Geert Uytterhoeven
*/
#include <linux/ata.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/libata.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/zorro.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_host.h>
#include <asm/amigahw.h>
#include <asm/amigaints.h>
#include <asm/amigayle.h>
#include <asm/ide.h>
#include <asm/setup.h>
#define DRV_NAME "pata_gayle"
#define DRV_VERSION "0.1.0"
#define GAYLE_CONTROL 0x101a
static struct scsi_host_template pata_gayle_sht = {
ATA_PIO_SHT(DRV_NAME),
};
/* FIXME: is this needed? */
static unsigned int pata_gayle_data_xfer(struct ata_queued_cmd *qc,
unsigned char *buf,
unsigned int buflen, int rw)
{
struct ata_device *dev = qc->dev;
struct ata_port *ap = dev->link->ap;
void __iomem *data_addr = ap->ioaddr.data_addr;
unsigned int words = buflen >> 1;
/* Transfer multiple of 2 bytes */
if (rw == READ)
raw_insw((u16 *)data_addr, (u16 *)buf, words);
else
raw_outsw((u16 *)data_addr, (u16 *)buf, words);
/* Transfer trailing byte, if any. */
if (unlikely(buflen & 0x01)) {
unsigned char pad[2] = { };
/* Point buf to the tail of buffer */
buf += buflen - 1;
if (rw == READ) {
raw_insw((u16 *)data_addr, (u16 *)pad, 1);
*buf = pad[0];
} else {
pad[0] = *buf;
raw_outsw((u16 *)data_addr, (u16 *)pad, 1);
}
words++;
}
return words << 1;
}
/*
* Provide our own set_mode() as we don't want to change anything that has
* already been configured..
*/
static int pata_gayle_set_mode(struct ata_link *link,
struct ata_device **unused)
{
struct ata_device *dev;
ata_for_each_dev(dev, link, ENABLED) {
/* We don't really care */
dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
dev->xfer_shift = ATA_SHIFT_PIO;
dev->flags |= ATA_DFLAG_PIO;
ata_dev_info(dev, "configured for PIO\n");
}
return 0;
}
static bool pata_gayle_irq_check(struct ata_port *ap)
{
u8 ch;
ch = z_readb((unsigned long)ap->private_data);
return !!(ch & GAYLE_IRQ_IDE);
}
static void pata_gayle_irq_clear(struct ata_port *ap)
{
(void)z_readb((unsigned long)ap->ioaddr.status_addr);
z_writeb(0x7c, (unsigned long)ap->private_data);
}
static struct ata_port_operations pata_gayle_a1200_ops = {
.inherits = &ata_sff_port_ops,
.sff_data_xfer = pata_gayle_data_xfer,
.sff_irq_check = pata_gayle_irq_check,
.sff_irq_clear = pata_gayle_irq_clear,
.cable_detect = ata_cable_unknown,
.set_mode = pata_gayle_set_mode,
};
static struct ata_port_operations pata_gayle_a4000_ops = {
.inherits = &ata_sff_port_ops,
.sff_data_xfer = pata_gayle_data_xfer,
.cable_detect = ata_cable_unknown,
.set_mode = pata_gayle_set_mode,
};
static int __init pata_gayle_init_one(struct platform_device *pdev)
{
struct resource *res;
struct gayle_ide_platform_data *pdata;
struct ata_host *host;
struct ata_port *ap;
void __iomem *base;
int ret;
pdata = dev_get_platdata(&pdev->dev);
dev_info(&pdev->dev, "Amiga Gayle IDE controller (A%u style)\n",
pdata->explicit_ack ? 1200 : 4000);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENODEV;
if (!devm_request_mem_region(&pdev->dev, res->start,
resource_size(res), DRV_NAME)) {
pr_err(DRV_NAME ": resources busy\n");
return -EBUSY;
}
/* allocate host */
host = ata_host_alloc(&pdev->dev, 1);
if (!host)
return -ENOMEM;
ap = host->ports[0];
if (pdata->explicit_ack)
ap->ops = &pata_gayle_a1200_ops;
else
ap->ops = &pata_gayle_a4000_ops;
ap->pio_mask = ATA_PIO4;
ap->flags |= ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;
base = ZTWO_VADDR(pdata->base);
ap->ioaddr.data_addr = base;
ap->ioaddr.error_addr = base + 2 + 1 * 4;
ap->ioaddr.feature_addr = base + 2 + 1 * 4;
ap->ioaddr.nsect_addr = base + 2 + 2 * 4;
ap->ioaddr.lbal_addr = base + 2 + 3 * 4;
ap->ioaddr.lbam_addr = base + 2 + 4 * 4;
ap->ioaddr.lbah_addr = base + 2 + 5 * 4;
ap->ioaddr.device_addr = base + 2 + 6 * 4;
ap->ioaddr.status_addr = base + 2 + 7 * 4;
ap->ioaddr.command_addr = base + 2 + 7 * 4;
ap->ioaddr.altstatus_addr = base + GAYLE_CONTROL;
ap->ioaddr.ctl_addr = base + GAYLE_CONTROL;
ap->private_data = (void *)ZTWO_VADDR(pdata->irqport);
ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", pdata->base,
pdata->base + GAYLE_CONTROL);
ret = ata_host_activate(host, IRQ_AMIGA_PORTS, ata_sff_interrupt,
IRQF_SHARED, &pata_gayle_sht);
if (ret)
return ret;
platform_set_drvdata(pdev, host);
return 0;
}
static int __exit pata_gayle_remove_one(struct platform_device *pdev)
{
struct ata_host *host = platform_get_drvdata(pdev);
ata_host_detach(host);
return 0;
}
static struct platform_driver pata_gayle_driver = {
.remove = __exit_p(pata_gayle_remove_one),
.driver = {
.name = "amiga-gayle-ide",
},
};
module_platform_driver_probe(pata_gayle_driver, pata_gayle_init_one);
MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
MODULE_DESCRIPTION("low-level driver for Amiga Gayle PATA");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:amiga-gayle-ide");
MODULE_VERSION(DRV_VERSION);
|
