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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 char *dma_buf;
67 dma_addr_t dma_handle;
68 struct pci_dev *dev;
69};
70
71static inline void parport_gsc_write_data(struct parport *p, unsigned char d)
72{
73#ifdef DEBUG_PARPORT
74 printk(KERN_DEBUG "%s(%p,0x%02x)\n", __func__, p, d);
75#endif
76 parport_writeb(d, DATA(p));
77}
78
79static inline unsigned char parport_gsc_read_data(struct parport *p)
80{
81 unsigned char val = parport_readb (DATA (p));
82#ifdef DEBUG_PARPORT
83 printk(KERN_DEBUG "%s(%p) = 0x%02x\n", __func__, p, val);
84#endif
85 return val;
86}
87
88/* __parport_gsc_frob_control differs from parport_gsc_frob_control in that
89 * it doesn't do any extra masking. */
90static inline unsigned char __parport_gsc_frob_control(struct parport *p,
91 unsigned char mask,
92 unsigned char val)
93{
94 struct parport_gsc_private *priv = p->physport->private_data;
95 unsigned char ctr = priv->ctr;
96#ifdef DEBUG_PARPORT
97 printk(KERN_DEBUG "%s(%02x,%02x): %02x -> %02x\n",
98 __func__, mask, val,
99 ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
100#endif
101 ctr = (ctr & ~mask) ^ val;
102 ctr &= priv->ctr_writable; /* only write writable bits. */
103 parport_writeb (ctr, CONTROL (p));
104 priv->ctr = ctr; /* Update soft copy */
105 return ctr;
106}
107
108static inline void parport_gsc_data_reverse(struct parport *p)
109{
110 __parport_gsc_frob_control (p, 0x20, 0x20);
111}
112
113static inline void parport_gsc_data_forward(struct parport *p)
114{
115 __parport_gsc_frob_control (p, 0x20, 0x00);
116}
117
118static inline void parport_gsc_write_control(struct parport *p,
119 unsigned char d)
120{
121 const unsigned char wm = (PARPORT_CONTROL_STROBE |
122 PARPORT_CONTROL_AUTOFD |
123 PARPORT_CONTROL_INIT |
124 PARPORT_CONTROL_SELECT);
125
126 /* Take this out when drivers have adapted to newer interface. */
127 if (d & 0x20) {
128 printk(KERN_DEBUG "%s (%s): use data_reverse for this!\n",
129 p->name, p->cad->name);
130 parport_gsc_data_reverse (p);
131 }
132
133 __parport_gsc_frob_control (p, wm, d & wm);
134}
135
136static inline unsigned char parport_gsc_read_control(struct parport *p)
137{
138 const unsigned char rm = (PARPORT_CONTROL_STROBE |
139 PARPORT_CONTROL_AUTOFD |
140 PARPORT_CONTROL_INIT |
141 PARPORT_CONTROL_SELECT);
142 const struct parport_gsc_private *priv = p->physport->private_data;
143 return priv->ctr & rm; /* Use soft copy */
144}
145
146static inline unsigned char parport_gsc_frob_control(struct parport *p,
147 unsigned char mask,
148 unsigned char val)
149{
150 const unsigned char wm = (PARPORT_CONTROL_STROBE |
151 PARPORT_CONTROL_AUTOFD |
152 PARPORT_CONTROL_INIT |
153 PARPORT_CONTROL_SELECT);
154
155 /* Take this out when drivers have adapted to newer interface. */
156 if (mask & 0x20) {
157 printk(KERN_DEBUG "%s (%s): use data_%s for this!\n",
158 p->name, p->cad->name,
159 (val & 0x20) ? "reverse" : "forward");
160 if (val & 0x20)
161 parport_gsc_data_reverse (p);
162 else
163 parport_gsc_data_forward (p);
164 }
165
166 /* Restrict mask and val to control lines. */
167 mask &= wm;
168 val &= wm;
169
170 return __parport_gsc_frob_control (p, mask, val);
171}
172
173static inline unsigned char parport_gsc_read_status(struct parport *p)
174{
175 return parport_readb (STATUS(p));
176}
177
178static inline void parport_gsc_disable_irq(struct parport *p)
179{
180 __parport_gsc_frob_control (p, 0x10, 0x00);
181}
182
183static inline void parport_gsc_enable_irq(struct parport *p)
184{
185 __parport_gsc_frob_control (p, 0x10, 0x10);
186}
187
188extern void parport_gsc_release_resources(struct parport *p);
189
190extern int parport_gsc_claim_resources(struct parport *p);
191
192extern void parport_gsc_init_state(struct pardevice *, struct parport_state *s);
193
194extern void parport_gsc_save_state(struct parport *p, struct parport_state *s);
195
196extern void parport_gsc_restore_state(struct parport *p, struct parport_state *s);
197
198extern void parport_gsc_inc_use_count(void);
199
200extern void parport_gsc_dec_use_count(void);
201
202extern struct parport *parport_gsc_probe_port(unsigned long base,
203 unsigned long base_hi,
204 int irq, int dma,
205 struct parisc_device *padev);
206
207#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 char *dma_buf;
67 dma_addr_t dma_handle;
68 struct pci_dev *dev;
69};
70
71static inline void parport_gsc_write_data(struct parport *p, unsigned char d)
72{
73#ifdef DEBUG_PARPORT
74 printk (KERN_DEBUG "parport_gsc_write_data(%p,0x%02x)\n", p, d);
75#endif
76 parport_writeb(d, DATA(p));
77}
78
79static inline unsigned char parport_gsc_read_data(struct parport *p)
80{
81 unsigned char val = parport_readb (DATA (p));
82#ifdef DEBUG_PARPORT
83 printk (KERN_DEBUG "parport_gsc_read_data(%p) = 0x%02x\n",
84 p, val);
85#endif
86 return val;
87}
88
89/* __parport_gsc_frob_control differs from parport_gsc_frob_control in that
90 * it doesn't do any extra masking. */
91static inline unsigned char __parport_gsc_frob_control(struct parport *p,
92 unsigned char mask,
93 unsigned char val)
94{
95 struct parport_gsc_private *priv = p->physport->private_data;
96 unsigned char ctr = priv->ctr;
97#ifdef DEBUG_PARPORT
98 printk (KERN_DEBUG
99 "__parport_gsc_frob_control(%02x,%02x): %02x -> %02x\n",
100 mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
101#endif
102 ctr = (ctr & ~mask) ^ val;
103 ctr &= priv->ctr_writable; /* only write writable bits. */
104 parport_writeb (ctr, CONTROL (p));
105 priv->ctr = ctr; /* Update soft copy */
106 return ctr;
107}
108
109static inline void parport_gsc_data_reverse(struct parport *p)
110{
111 __parport_gsc_frob_control (p, 0x20, 0x20);
112}
113
114static inline void parport_gsc_data_forward(struct parport *p)
115{
116 __parport_gsc_frob_control (p, 0x20, 0x00);
117}
118
119static inline void parport_gsc_write_control(struct parport *p,
120 unsigned char d)
121{
122 const unsigned char wm = (PARPORT_CONTROL_STROBE |
123 PARPORT_CONTROL_AUTOFD |
124 PARPORT_CONTROL_INIT |
125 PARPORT_CONTROL_SELECT);
126
127 /* Take this out when drivers have adapted to newer interface. */
128 if (d & 0x20) {
129 printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n",
130 p->name, p->cad->name);
131 parport_gsc_data_reverse (p);
132 }
133
134 __parport_gsc_frob_control (p, wm, d & wm);
135}
136
137static inline unsigned char parport_gsc_read_control(struct parport *p)
138{
139 const unsigned char rm = (PARPORT_CONTROL_STROBE |
140 PARPORT_CONTROL_AUTOFD |
141 PARPORT_CONTROL_INIT |
142 PARPORT_CONTROL_SELECT);
143 const struct parport_gsc_private *priv = p->physport->private_data;
144 return priv->ctr & rm; /* Use soft copy */
145}
146
147static inline unsigned char parport_gsc_frob_control(struct parport *p,
148 unsigned char mask,
149 unsigned char val)
150{
151 const unsigned char wm = (PARPORT_CONTROL_STROBE |
152 PARPORT_CONTROL_AUTOFD |
153 PARPORT_CONTROL_INIT |
154 PARPORT_CONTROL_SELECT);
155
156 /* Take this out when drivers have adapted to newer interface. */
157 if (mask & 0x20) {
158 printk (KERN_DEBUG "%s (%s): use data_%s for this!\n",
159 p->name, p->cad->name,
160 (val & 0x20) ? "reverse" : "forward");
161 if (val & 0x20)
162 parport_gsc_data_reverse (p);
163 else
164 parport_gsc_data_forward (p);
165 }
166
167 /* Restrict mask and val to control lines. */
168 mask &= wm;
169 val &= wm;
170
171 return __parport_gsc_frob_control (p, mask, val);
172}
173
174static inline unsigned char parport_gsc_read_status(struct parport *p)
175{
176 return parport_readb (STATUS(p));
177}
178
179static inline void parport_gsc_disable_irq(struct parport *p)
180{
181 __parport_gsc_frob_control (p, 0x10, 0x00);
182}
183
184static inline void parport_gsc_enable_irq(struct parport *p)
185{
186 __parport_gsc_frob_control (p, 0x10, 0x10);
187}
188
189extern void parport_gsc_release_resources(struct parport *p);
190
191extern int parport_gsc_claim_resources(struct parport *p);
192
193extern void parport_gsc_init_state(struct pardevice *, struct parport_state *s);
194
195extern void parport_gsc_save_state(struct parport *p, struct parport_state *s);
196
197extern void parport_gsc_restore_state(struct parport *p, struct parport_state *s);
198
199extern void parport_gsc_inc_use_count(void);
200
201extern void parport_gsc_dec_use_count(void);
202
203extern struct parport *parport_gsc_probe_port(unsigned long base,
204 unsigned long base_hi,
205 int irq, int dma,
206 struct parisc_device *padev);
207
208#endif /* __DRIVERS_PARPORT_PARPORT_GSC_H */