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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Low-level parallel-support for PC-style hardware integrated in the
4 * LASI-Controller (on GSC-Bus) for HP-PARISC Workstations
5 *
6 * (C) 1999-2001 by Helge Deller <deller@gmx.de>
7 *
8 * based on parport_pc.c by
9 * Grant Guenther <grant@torque.net>
10 * Phil Blundell <Philip.Blundell@pobox.com>
11 * Tim Waugh <tim@cyberelk.demon.co.uk>
12 * Jose Renau <renau@acm.org>
13 * David Campbell
14 * Andrea Arcangeli
15 */
16
17#ifndef __DRIVERS_PARPORT_PARPORT_GSC_H
18#define __DRIVERS_PARPORT_PARPORT_GSC_H
19
20#include <asm/io.h>
21#include <linux/delay.h>
22
23#undef DEBUG_PARPORT /* undefine for production */
24#define DELAY_TIME 0
25
26#if DELAY_TIME == 0
27#define parport_readb gsc_readb
28#define parport_writeb gsc_writeb
29#else
30static __inline__ unsigned char parport_readb( unsigned long port )
31{
32 udelay(DELAY_TIME);
33 return gsc_readb(port);
34}
35
36static __inline__ void parport_writeb( unsigned char value, unsigned long port )
37{
38 gsc_writeb(value,port);
39 udelay(DELAY_TIME);
40}
41#endif
42
43/* --- register definitions ------------------------------- */
44
45#define EPPDATA(p) ((p)->base + 0x4)
46#define EPPADDR(p) ((p)->base + 0x3)
47#define CONTROL(p) ((p)->base + 0x2)
48#define STATUS(p) ((p)->base + 0x1)
49#define DATA(p) ((p)->base + 0x0)
50
51struct parport_gsc_private {
52 /* Contents of CTR. */
53 unsigned char ctr;
54
55 /* Bitmask of writable CTR bits. */
56 unsigned char ctr_writable;
57
58 /* Number of bytes per portword. */
59 int pword;
60
61 /* Not used yet. */
62 int readIntrThreshold;
63 int writeIntrThreshold;
64
65 /* buffer suitable for DMA, if DMA enabled */
66 struct pci_dev *dev;
67};
68
69static inline void parport_gsc_write_data(struct parport *p, unsigned char d)
70{
71#ifdef DEBUG_PARPORT
72 printk(KERN_DEBUG "%s(%p,0x%02x)\n", __func__, p, d);
73#endif
74 parport_writeb(d, DATA(p));
75}
76
77static inline unsigned char parport_gsc_read_data(struct parport *p)
78{
79 unsigned char val = parport_readb (DATA (p));
80#ifdef DEBUG_PARPORT
81 printk(KERN_DEBUG "%s(%p) = 0x%02x\n", __func__, p, val);
82#endif
83 return val;
84}
85
86/* __parport_gsc_frob_control differs from parport_gsc_frob_control in that
87 * it doesn't do any extra masking. */
88static inline unsigned char __parport_gsc_frob_control(struct parport *p,
89 unsigned char mask,
90 unsigned char val)
91{
92 struct parport_gsc_private *priv = p->physport->private_data;
93 unsigned char ctr = priv->ctr;
94#ifdef DEBUG_PARPORT
95 printk(KERN_DEBUG "%s(%02x,%02x): %02x -> %02x\n",
96 __func__, mask, val,
97 ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
98#endif
99 ctr = (ctr & ~mask) ^ val;
100 ctr &= priv->ctr_writable; /* only write writable bits. */
101 parport_writeb (ctr, CONTROL (p));
102 priv->ctr = ctr; /* Update soft copy */
103 return ctr;
104}
105
106static inline void parport_gsc_data_reverse(struct parport *p)
107{
108 __parport_gsc_frob_control (p, 0x20, 0x20);
109}
110
111static inline void parport_gsc_data_forward(struct parport *p)
112{
113 __parport_gsc_frob_control (p, 0x20, 0x00);
114}
115
116static inline void parport_gsc_write_control(struct parport *p,
117 unsigned char d)
118{
119 const unsigned char wm = (PARPORT_CONTROL_STROBE |
120 PARPORT_CONTROL_AUTOFD |
121 PARPORT_CONTROL_INIT |
122 PARPORT_CONTROL_SELECT);
123
124 /* Take this out when drivers have adapted to newer interface. */
125 if (d & 0x20) {
126 printk(KERN_DEBUG "%s (%s): use data_reverse for this!\n",
127 p->name, p->cad->name);
128 parport_gsc_data_reverse (p);
129 }
130
131 __parport_gsc_frob_control (p, wm, d & wm);
132}
133
134static inline unsigned char parport_gsc_read_control(struct parport *p)
135{
136 const unsigned char rm = (PARPORT_CONTROL_STROBE |
137 PARPORT_CONTROL_AUTOFD |
138 PARPORT_CONTROL_INIT |
139 PARPORT_CONTROL_SELECT);
140 const struct parport_gsc_private *priv = p->physport->private_data;
141 return priv->ctr & rm; /* Use soft copy */
142}
143
144static inline unsigned char parport_gsc_frob_control(struct parport *p,
145 unsigned char mask,
146 unsigned char val)
147{
148 const unsigned char wm = (PARPORT_CONTROL_STROBE |
149 PARPORT_CONTROL_AUTOFD |
150 PARPORT_CONTROL_INIT |
151 PARPORT_CONTROL_SELECT);
152
153 /* Take this out when drivers have adapted to newer interface. */
154 if (mask & 0x20) {
155 printk(KERN_DEBUG "%s (%s): use data_%s for this!\n",
156 p->name, p->cad->name,
157 (val & 0x20) ? "reverse" : "forward");
158 if (val & 0x20)
159 parport_gsc_data_reverse (p);
160 else
161 parport_gsc_data_forward (p);
162 }
163
164 /* Restrict mask and val to control lines. */
165 mask &= wm;
166 val &= wm;
167
168 return __parport_gsc_frob_control (p, mask, val);
169}
170
171static inline unsigned char parport_gsc_read_status(struct parport *p)
172{
173 return parport_readb (STATUS(p));
174}
175
176static inline void parport_gsc_disable_irq(struct parport *p)
177{
178 __parport_gsc_frob_control (p, 0x10, 0x00);
179}
180
181static inline void parport_gsc_enable_irq(struct parport *p)
182{
183 __parport_gsc_frob_control (p, 0x10, 0x10);
184}
185
186extern void parport_gsc_release_resources(struct parport *p);
187
188extern int parport_gsc_claim_resources(struct parport *p);
189
190extern void parport_gsc_init_state(struct pardevice *, struct parport_state *s);
191
192extern void parport_gsc_save_state(struct parport *p, struct parport_state *s);
193
194extern void parport_gsc_restore_state(struct parport *p, struct parport_state *s);
195
196extern void parport_gsc_inc_use_count(void);
197
198extern void parport_gsc_dec_use_count(void);
199
200#endif /* __DRIVERS_PARPORT_PARPORT_GSC_H */
1/*
2 * Low-level parallel-support for PC-style hardware integrated in the
3 * LASI-Controller (on GSC-Bus) for HP-PARISC Workstations
4 *
5 * (C) 1999-2001 by Helge Deller <deller@gmx.de>
6 *
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * based on parport_pc.c by
23 * Grant Guenther <grant@torque.net>
24 * Phil Blundell <Philip.Blundell@pobox.com>
25 * Tim Waugh <tim@cyberelk.demon.co.uk>
26 * Jose Renau <renau@acm.org>
27 * David Campbell
28 * Andrea Arcangeli
29 */
30
31#ifndef __DRIVERS_PARPORT_PARPORT_GSC_H
32#define __DRIVERS_PARPORT_PARPORT_GSC_H
33
34#include <asm/io.h>
35#include <linux/delay.h>
36
37#undef DEBUG_PARPORT /* undefine for production */
38#define DELAY_TIME 0
39
40#if DELAY_TIME == 0
41#define parport_readb gsc_readb
42#define parport_writeb gsc_writeb
43#else
44static __inline__ unsigned char parport_readb( unsigned long port )
45{
46 udelay(DELAY_TIME);
47 return gsc_readb(port);
48}
49
50static __inline__ void parport_writeb( unsigned char value, unsigned long port )
51{
52 gsc_writeb(value,port);
53 udelay(DELAY_TIME);
54}
55#endif
56
57/* --- register definitions ------------------------------- */
58
59#define EPPDATA(p) ((p)->base + 0x4)
60#define EPPADDR(p) ((p)->base + 0x3)
61#define CONTROL(p) ((p)->base + 0x2)
62#define STATUS(p) ((p)->base + 0x1)
63#define DATA(p) ((p)->base + 0x0)
64
65struct parport_gsc_private {
66 /* Contents of CTR. */
67 unsigned char ctr;
68
69 /* Bitmask of writable CTR bits. */
70 unsigned char ctr_writable;
71
72 /* Number of bytes per portword. */
73 int pword;
74
75 /* Not used yet. */
76 int readIntrThreshold;
77 int writeIntrThreshold;
78
79 /* buffer suitable for DMA, if DMA enabled */
80 char *dma_buf;
81 dma_addr_t dma_handle;
82 struct pci_dev *dev;
83};
84
85static inline void parport_gsc_write_data(struct parport *p, unsigned char d)
86{
87#ifdef DEBUG_PARPORT
88 printk (KERN_DEBUG "parport_gsc_write_data(%p,0x%02x)\n", p, d);
89#endif
90 parport_writeb(d, DATA(p));
91}
92
93static inline unsigned char parport_gsc_read_data(struct parport *p)
94{
95 unsigned char val = parport_readb (DATA (p));
96#ifdef DEBUG_PARPORT
97 printk (KERN_DEBUG "parport_gsc_read_data(%p) = 0x%02x\n",
98 p, val);
99#endif
100 return val;
101}
102
103/* __parport_gsc_frob_control differs from parport_gsc_frob_control in that
104 * it doesn't do any extra masking. */
105static inline unsigned char __parport_gsc_frob_control(struct parport *p,
106 unsigned char mask,
107 unsigned char val)
108{
109 struct parport_gsc_private *priv = p->physport->private_data;
110 unsigned char ctr = priv->ctr;
111#ifdef DEBUG_PARPORT
112 printk (KERN_DEBUG
113 "__parport_gsc_frob_control(%02x,%02x): %02x -> %02x\n",
114 mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
115#endif
116 ctr = (ctr & ~mask) ^ val;
117 ctr &= priv->ctr_writable; /* only write writable bits. */
118 parport_writeb (ctr, CONTROL (p));
119 priv->ctr = ctr; /* Update soft copy */
120 return ctr;
121}
122
123static inline void parport_gsc_data_reverse(struct parport *p)
124{
125 __parport_gsc_frob_control (p, 0x20, 0x20);
126}
127
128static inline void parport_gsc_data_forward(struct parport *p)
129{
130 __parport_gsc_frob_control (p, 0x20, 0x00);
131}
132
133static inline void parport_gsc_write_control(struct parport *p,
134 unsigned char d)
135{
136 const unsigned char wm = (PARPORT_CONTROL_STROBE |
137 PARPORT_CONTROL_AUTOFD |
138 PARPORT_CONTROL_INIT |
139 PARPORT_CONTROL_SELECT);
140
141 /* Take this out when drivers have adapted to newer interface. */
142 if (d & 0x20) {
143 printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n",
144 p->name, p->cad->name);
145 parport_gsc_data_reverse (p);
146 }
147
148 __parport_gsc_frob_control (p, wm, d & wm);
149}
150
151static inline unsigned char parport_gsc_read_control(struct parport *p)
152{
153 const unsigned char rm = (PARPORT_CONTROL_STROBE |
154 PARPORT_CONTROL_AUTOFD |
155 PARPORT_CONTROL_INIT |
156 PARPORT_CONTROL_SELECT);
157 const struct parport_gsc_private *priv = p->physport->private_data;
158 return priv->ctr & rm; /* Use soft copy */
159}
160
161static inline unsigned char parport_gsc_frob_control(struct parport *p,
162 unsigned char mask,
163 unsigned char val)
164{
165 const unsigned char wm = (PARPORT_CONTROL_STROBE |
166 PARPORT_CONTROL_AUTOFD |
167 PARPORT_CONTROL_INIT |
168 PARPORT_CONTROL_SELECT);
169
170 /* Take this out when drivers have adapted to newer interface. */
171 if (mask & 0x20) {
172 printk (KERN_DEBUG "%s (%s): use data_%s for this!\n",
173 p->name, p->cad->name,
174 (val & 0x20) ? "reverse" : "forward");
175 if (val & 0x20)
176 parport_gsc_data_reverse (p);
177 else
178 parport_gsc_data_forward (p);
179 }
180
181 /* Restrict mask and val to control lines. */
182 mask &= wm;
183 val &= wm;
184
185 return __parport_gsc_frob_control (p, mask, val);
186}
187
188static inline unsigned char parport_gsc_read_status(struct parport *p)
189{
190 return parport_readb (STATUS(p));
191}
192
193static inline void parport_gsc_disable_irq(struct parport *p)
194{
195 __parport_gsc_frob_control (p, 0x10, 0x00);
196}
197
198static inline void parport_gsc_enable_irq(struct parport *p)
199{
200 __parport_gsc_frob_control (p, 0x10, 0x10);
201}
202
203extern void parport_gsc_release_resources(struct parport *p);
204
205extern int parport_gsc_claim_resources(struct parport *p);
206
207extern void parport_gsc_init_state(struct pardevice *, struct parport_state *s);
208
209extern void parport_gsc_save_state(struct parport *p, struct parport_state *s);
210
211extern void parport_gsc_restore_state(struct parport *p, struct parport_state *s);
212
213extern void parport_gsc_inc_use_count(void);
214
215extern void parport_gsc_dec_use_count(void);
216
217extern struct parport *parport_gsc_probe_port(unsigned long base,
218 unsigned long base_hi,
219 int irq, int dma,
220 struct parisc_device *padev);
221
222#endif /* __DRIVERS_PARPORT_PARPORT_GSC_H */