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
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Low-level parallel-support for PC-style hardware integrated in the
* LASI-Controller (on GSC-Bus) for HP-PARISC Workstations
*
* (C) 1999-2001 by Helge Deller <deller@gmx.de>
*
* based on parport_pc.c by
* Grant Guenther <grant@torque.net>
* Phil Blundell <Philip.Blundell@pobox.com>
* Tim Waugh <tim@cyberelk.demon.co.uk>
* Jose Renau <renau@acm.org>
* David Campbell
* Andrea Arcangeli
*/
#ifndef __DRIVERS_PARPORT_PARPORT_GSC_H
#define __DRIVERS_PARPORT_PARPORT_GSC_H
#include <asm/io.h>
#include <linux/delay.h>
#undef DEBUG_PARPORT /* undefine for production */
#define DELAY_TIME 0
#if DELAY_TIME == 0
#define parport_readb gsc_readb
#define parport_writeb gsc_writeb
#else
static __inline__ unsigned char parport_readb( unsigned long port )
{
udelay(DELAY_TIME);
return gsc_readb(port);
}
static __inline__ void parport_writeb( unsigned char value, unsigned long port )
{
gsc_writeb(value,port);
udelay(DELAY_TIME);
}
#endif
/* --- register definitions ------------------------------- */
#define EPPDATA(p) ((p)->base + 0x4)
#define EPPADDR(p) ((p)->base + 0x3)
#define CONTROL(p) ((p)->base + 0x2)
#define STATUS(p) ((p)->base + 0x1)
#define DATA(p) ((p)->base + 0x0)
struct parport_gsc_private {
/* Contents of CTR. */
unsigned char ctr;
/* Bitmask of writable CTR bits. */
unsigned char ctr_writable;
/* Number of bytes per portword. */
int pword;
/* Not used yet. */
int readIntrThreshold;
int writeIntrThreshold;
/* buffer suitable for DMA, if DMA enabled */
char *dma_buf;
dma_addr_t dma_handle;
struct pci_dev *dev;
};
static inline void parport_gsc_write_data(struct parport *p, unsigned char d)
{
#ifdef DEBUG_PARPORT
printk(KERN_DEBUG "%s(%p,0x%02x)\n", __func__, p, d);
#endif
parport_writeb(d, DATA(p));
}
static inline unsigned char parport_gsc_read_data(struct parport *p)
{
unsigned char val = parport_readb (DATA (p));
#ifdef DEBUG_PARPORT
printk(KERN_DEBUG "%s(%p) = 0x%02x\n", __func__, p, val);
#endif
return val;
}
/* __parport_gsc_frob_control differs from parport_gsc_frob_control in that
* it doesn't do any extra masking. */
static inline unsigned char __parport_gsc_frob_control(struct parport *p,
unsigned char mask,
unsigned char val)
{
struct parport_gsc_private *priv = p->physport->private_data;
unsigned char ctr = priv->ctr;
#ifdef DEBUG_PARPORT
printk(KERN_DEBUG "%s(%02x,%02x): %02x -> %02x\n",
__func__, mask, val,
ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
#endif
ctr = (ctr & ~mask) ^ val;
ctr &= priv->ctr_writable; /* only write writable bits. */
parport_writeb (ctr, CONTROL (p));
priv->ctr = ctr; /* Update soft copy */
return ctr;
}
static inline void parport_gsc_data_reverse(struct parport *p)
{
__parport_gsc_frob_control (p, 0x20, 0x20);
}
static inline void parport_gsc_data_forward(struct parport *p)
{
__parport_gsc_frob_control (p, 0x20, 0x00);
}
static inline void parport_gsc_write_control(struct parport *p,
unsigned char d)
{
const unsigned char wm = (PARPORT_CONTROL_STROBE |
PARPORT_CONTROL_AUTOFD |
PARPORT_CONTROL_INIT |
PARPORT_CONTROL_SELECT);
/* Take this out when drivers have adapted to newer interface. */
if (d & 0x20) {
printk(KERN_DEBUG "%s (%s): use data_reverse for this!\n",
p->name, p->cad->name);
parport_gsc_data_reverse (p);
}
__parport_gsc_frob_control (p, wm, d & wm);
}
static inline unsigned char parport_gsc_read_control(struct parport *p)
{
const unsigned char rm = (PARPORT_CONTROL_STROBE |
PARPORT_CONTROL_AUTOFD |
PARPORT_CONTROL_INIT |
PARPORT_CONTROL_SELECT);
const struct parport_gsc_private *priv = p->physport->private_data;
return priv->ctr & rm; /* Use soft copy */
}
static inline unsigned char parport_gsc_frob_control(struct parport *p,
unsigned char mask,
unsigned char val)
{
const unsigned char wm = (PARPORT_CONTROL_STROBE |
PARPORT_CONTROL_AUTOFD |
PARPORT_CONTROL_INIT |
PARPORT_CONTROL_SELECT);
/* Take this out when drivers have adapted to newer interface. */
if (mask & 0x20) {
printk(KERN_DEBUG "%s (%s): use data_%s for this!\n",
p->name, p->cad->name,
(val & 0x20) ? "reverse" : "forward");
if (val & 0x20)
parport_gsc_data_reverse (p);
else
parport_gsc_data_forward (p);
}
/* Restrict mask and val to control lines. */
mask &= wm;
val &= wm;
return __parport_gsc_frob_control (p, mask, val);
}
static inline unsigned char parport_gsc_read_status(struct parport *p)
{
return parport_readb (STATUS(p));
}
static inline void parport_gsc_disable_irq(struct parport *p)
{
__parport_gsc_frob_control (p, 0x10, 0x00);
}
static inline void parport_gsc_enable_irq(struct parport *p)
{
__parport_gsc_frob_control (p, 0x10, 0x10);
}
extern void parport_gsc_release_resources(struct parport *p);
extern int parport_gsc_claim_resources(struct parport *p);
extern void parport_gsc_init_state(struct pardevice *, struct parport_state *s);
extern void parport_gsc_save_state(struct parport *p, struct parport_state *s);
extern void parport_gsc_restore_state(struct parport *p, struct parport_state *s);
extern void parport_gsc_inc_use_count(void);
extern void parport_gsc_dec_use_count(void);
extern struct parport *parport_gsc_probe_port(unsigned long base,
unsigned long base_hi,
int irq, int dma,
struct parisc_device *padev);
#endif /* __DRIVERS_PARPORT_PARPORT_GSC_H */
|
