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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/* 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 */