Loading...
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __LINUX_PARPORT_PC_H
3#define __LINUX_PARPORT_PC_H
4
5#include <asm/io.h>
6
7/* --- register definitions ------------------------------- */
8
9#define ECONTROL(p) ((p)->base_hi + 0x2)
10#define CONFIGB(p) ((p)->base_hi + 0x1)
11#define CONFIGA(p) ((p)->base_hi + 0x0)
12#define FIFO(p) ((p)->base_hi + 0x0)
13#define EPPDATA(p) ((p)->base + 0x4)
14#define EPPADDR(p) ((p)->base + 0x3)
15#define CONTROL(p) ((p)->base + 0x2)
16#define STATUS(p) ((p)->base + 0x1)
17#define DATA(p) ((p)->base + 0x0)
18
19struct parport_pc_private {
20 /* Contents of CTR. */
21 unsigned char ctr;
22
23 /* Bitmask of writable CTR bits. */
24 unsigned char ctr_writable;
25
26 /* Whether or not there's an ECR. */
27 int ecr;
28
29 /* Number of PWords that FIFO will hold. */
30 int fifo_depth;
31
32 /* Number of bytes per portword. */
33 int pword;
34
35 /* Not used yet. */
36 int readIntrThreshold;
37 int writeIntrThreshold;
38
39 /* buffer suitable for DMA, if DMA enabled */
40 char *dma_buf;
41 dma_addr_t dma_handle;
42 struct list_head list;
43 struct parport *port;
44};
45
46struct parport_pc_via_data
47{
48 /* ISA PnP IRQ routing register 1 */
49 u8 via_pci_parport_irq_reg;
50 /* ISA PnP DMA request routing register */
51 u8 via_pci_parport_dma_reg;
52 /* Register and value to enable SuperIO configuration access */
53 u8 via_pci_superio_config_reg;
54 u8 via_pci_superio_config_data;
55 /* SuperIO function register number */
56 u8 viacfg_function;
57 /* parallel port control register number */
58 u8 viacfg_parport_control;
59 /* Parallel port base address register */
60 u8 viacfg_parport_base;
61};
62
63static __inline__ void parport_pc_write_data(struct parport *p, unsigned char d)
64{
65#ifdef DEBUG_PARPORT
66 printk (KERN_DEBUG "parport_pc_write_data(%p,0x%02x)\n", p, d);
67#endif
68 outb(d, DATA(p));
69}
70
71static __inline__ unsigned char parport_pc_read_data(struct parport *p)
72{
73 unsigned char val = inb (DATA (p));
74#ifdef DEBUG_PARPORT
75 printk (KERN_DEBUG "parport_pc_read_data(%p) = 0x%02x\n",
76 p, val);
77#endif
78 return val;
79}
80
81#ifdef DEBUG_PARPORT
82static inline void dump_parport_state (char *str, struct parport *p)
83{
84 /* here's hoping that reading these ports won't side-effect anything underneath */
85 unsigned char ecr = inb (ECONTROL (p));
86 unsigned char dcr = inb (CONTROL (p));
87 unsigned char dsr = inb (STATUS (p));
88 static const char *const ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"};
89 const struct parport_pc_private *priv = p->physport->private_data;
90 int i;
91
92 printk (KERN_DEBUG "*** parport state (%s): ecr=[%s", str, ecr_modes[(ecr & 0xe0) >> 5]);
93 if (ecr & 0x10) printk (",nErrIntrEn");
94 if (ecr & 0x08) printk (",dmaEn");
95 if (ecr & 0x04) printk (",serviceIntr");
96 if (ecr & 0x02) printk (",f_full");
97 if (ecr & 0x01) printk (",f_empty");
98 for (i=0; i<2; i++) {
99 printk ("] dcr(%s)=[", i ? "soft" : "hard");
100 dcr = i ? priv->ctr : inb (CONTROL (p));
101
102 if (dcr & 0x20) {
103 printk ("rev");
104 } else {
105 printk ("fwd");
106 }
107 if (dcr & 0x10) printk (",ackIntEn");
108 if (!(dcr & 0x08)) printk (",N-SELECT-IN");
109 if (dcr & 0x04) printk (",N-INIT");
110 if (!(dcr & 0x02)) printk (",N-AUTOFD");
111 if (!(dcr & 0x01)) printk (",N-STROBE");
112 }
113 printk ("] dsr=[");
114 if (!(dsr & 0x80)) printk ("BUSY");
115 if (dsr & 0x40) printk (",N-ACK");
116 if (dsr & 0x20) printk (",PERROR");
117 if (dsr & 0x10) printk (",SELECT");
118 if (dsr & 0x08) printk (",N-FAULT");
119 printk ("]\n");
120 return;
121}
122#else /* !DEBUG_PARPORT */
123#define dump_parport_state(args...)
124#endif /* !DEBUG_PARPORT */
125
126/* __parport_pc_frob_control differs from parport_pc_frob_control in that
127 * it doesn't do any extra masking. */
128static __inline__ unsigned char __parport_pc_frob_control (struct parport *p,
129 unsigned char mask,
130 unsigned char val)
131{
132 struct parport_pc_private *priv = p->physport->private_data;
133 unsigned char ctr = priv->ctr;
134#ifdef DEBUG_PARPORT
135 printk (KERN_DEBUG
136 "__parport_pc_frob_control(%02x,%02x): %02x -> %02x\n",
137 mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
138#endif
139 ctr = (ctr & ~mask) ^ val;
140 ctr &= priv->ctr_writable; /* only write writable bits. */
141 outb (ctr, CONTROL (p));
142 priv->ctr = ctr; /* Update soft copy */
143 return ctr;
144}
145
146static __inline__ void parport_pc_data_reverse (struct parport *p)
147{
148 __parport_pc_frob_control (p, 0x20, 0x20);
149}
150
151static __inline__ void parport_pc_data_forward (struct parport *p)
152{
153 __parport_pc_frob_control (p, 0x20, 0x00);
154}
155
156static __inline__ void parport_pc_write_control (struct parport *p,
157 unsigned char d)
158{
159 const unsigned char wm = (PARPORT_CONTROL_STROBE |
160 PARPORT_CONTROL_AUTOFD |
161 PARPORT_CONTROL_INIT |
162 PARPORT_CONTROL_SELECT);
163
164 /* Take this out when drivers have adapted to newer interface. */
165 if (d & 0x20) {
166 printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n",
167 p->name, p->cad->name);
168 parport_pc_data_reverse (p);
169 }
170
171 __parport_pc_frob_control (p, wm, d & wm);
172}
173
174static __inline__ unsigned char parport_pc_read_control(struct parport *p)
175{
176 const unsigned char rm = (PARPORT_CONTROL_STROBE |
177 PARPORT_CONTROL_AUTOFD |
178 PARPORT_CONTROL_INIT |
179 PARPORT_CONTROL_SELECT);
180 const struct parport_pc_private *priv = p->physport->private_data;
181 return priv->ctr & rm; /* Use soft copy */
182}
183
184static __inline__ unsigned char parport_pc_frob_control (struct parport *p,
185 unsigned char mask,
186 unsigned char val)
187{
188 const unsigned char wm = (PARPORT_CONTROL_STROBE |
189 PARPORT_CONTROL_AUTOFD |
190 PARPORT_CONTROL_INIT |
191 PARPORT_CONTROL_SELECT);
192
193 /* Take this out when drivers have adapted to newer interface. */
194 if (mask & 0x20) {
195 printk (KERN_DEBUG "%s (%s): use data_%s for this!\n",
196 p->name, p->cad->name,
197 (val & 0x20) ? "reverse" : "forward");
198 if (val & 0x20)
199 parport_pc_data_reverse (p);
200 else
201 parport_pc_data_forward (p);
202 }
203
204 /* Restrict mask and val to control lines. */
205 mask &= wm;
206 val &= wm;
207
208 return __parport_pc_frob_control (p, mask, val);
209}
210
211static __inline__ unsigned char parport_pc_read_status(struct parport *p)
212{
213 return inb(STATUS(p));
214}
215
216
217static __inline__ void parport_pc_disable_irq(struct parport *p)
218{
219 __parport_pc_frob_control (p, 0x10, 0x00);
220}
221
222static __inline__ void parport_pc_enable_irq(struct parport *p)
223{
224 __parport_pc_frob_control (p, 0x10, 0x10);
225}
226
227extern void parport_pc_release_resources(struct parport *p);
228
229extern int parport_pc_claim_resources(struct parport *p);
230
231/* PCMCIA code will want to get us to look at a port. Provide a mechanism. */
232extern struct parport *parport_pc_probe_port(unsigned long base,
233 unsigned long base_hi,
234 int irq, int dma,
235 struct device *dev,
236 int irqflags);
237extern void parport_pc_unregister_port(struct parport *p);
238
239#endif
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __LINUX_PARPORT_PC_H
3#define __LINUX_PARPORT_PC_H
4
5#include <asm/io.h>
6
7/* --- register definitions ------------------------------- */
8
9#define ECONTROL(p) ((p)->base_hi + 0x2)
10#define CONFIGB(p) ((p)->base_hi + 0x1)
11#define CONFIGA(p) ((p)->base_hi + 0x0)
12#define FIFO(p) ((p)->base_hi + 0x0)
13#define EPPDATA(p) ((p)->base + 0x4)
14#define EPPADDR(p) ((p)->base + 0x3)
15#define CONTROL(p) ((p)->base + 0x2)
16#define STATUS(p) ((p)->base + 0x1)
17#define DATA(p) ((p)->base + 0x0)
18
19struct parport_pc_private {
20 /* Contents of CTR. */
21 unsigned char ctr;
22
23 /* Bitmask of writable CTR bits. */
24 unsigned char ctr_writable;
25
26 /* Whether or not there's an ECR. */
27 int ecr;
28
29 /* Bitmask of writable ECR bits. */
30 unsigned char ecr_writable;
31
32 /* Number of PWords that FIFO will hold. */
33 int fifo_depth;
34
35 /* Number of bytes per portword. */
36 int pword;
37
38 /* Not used yet. */
39 int readIntrThreshold;
40 int writeIntrThreshold;
41
42 /* buffer suitable for DMA, if DMA enabled */
43 char *dma_buf;
44 dma_addr_t dma_handle;
45 struct list_head list;
46 struct parport *port;
47};
48
49struct parport_pc_via_data
50{
51 /* ISA PnP IRQ routing register 1 */
52 u8 via_pci_parport_irq_reg;
53 /* ISA PnP DMA request routing register */
54 u8 via_pci_parport_dma_reg;
55 /* Register and value to enable SuperIO configuration access */
56 u8 via_pci_superio_config_reg;
57 u8 via_pci_superio_config_data;
58 /* SuperIO function register number */
59 u8 viacfg_function;
60 /* parallel port control register number */
61 u8 viacfg_parport_control;
62 /* Parallel port base address register */
63 u8 viacfg_parport_base;
64};
65
66static __inline__ void parport_pc_write_data(struct parport *p, unsigned char d)
67{
68#ifdef DEBUG_PARPORT
69 printk (KERN_DEBUG "parport_pc_write_data(%p,0x%02x)\n", p, d);
70#endif
71 outb(d, DATA(p));
72}
73
74static __inline__ unsigned char parport_pc_read_data(struct parport *p)
75{
76 unsigned char val = inb (DATA (p));
77#ifdef DEBUG_PARPORT
78 printk (KERN_DEBUG "parport_pc_read_data(%p) = 0x%02x\n",
79 p, val);
80#endif
81 return val;
82}
83
84#ifdef DEBUG_PARPORT
85static inline void dump_parport_state (char *str, struct parport *p)
86{
87 /* here's hoping that reading these ports won't side-effect anything underneath */
88 unsigned char ecr = inb (ECONTROL (p));
89 unsigned char dcr = inb (CONTROL (p));
90 unsigned char dsr = inb (STATUS (p));
91 static const char *const ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"};
92 const struct parport_pc_private *priv = p->physport->private_data;
93 int i;
94
95 printk (KERN_DEBUG "*** parport state (%s): ecr=[%s", str, ecr_modes[(ecr & 0xe0) >> 5]);
96 if (ecr & 0x10) printk (",nErrIntrEn");
97 if (ecr & 0x08) printk (",dmaEn");
98 if (ecr & 0x04) printk (",serviceIntr");
99 if (ecr & 0x02) printk (",f_full");
100 if (ecr & 0x01) printk (",f_empty");
101 for (i=0; i<2; i++) {
102 printk ("] dcr(%s)=[", i ? "soft" : "hard");
103 dcr = i ? priv->ctr : inb (CONTROL (p));
104
105 if (dcr & 0x20) {
106 printk ("rev");
107 } else {
108 printk ("fwd");
109 }
110 if (dcr & 0x10) printk (",ackIntEn");
111 if (!(dcr & 0x08)) printk (",N-SELECT-IN");
112 if (dcr & 0x04) printk (",N-INIT");
113 if (!(dcr & 0x02)) printk (",N-AUTOFD");
114 if (!(dcr & 0x01)) printk (",N-STROBE");
115 }
116 printk ("] dsr=[");
117 if (!(dsr & 0x80)) printk ("BUSY");
118 if (dsr & 0x40) printk (",N-ACK");
119 if (dsr & 0x20) printk (",PERROR");
120 if (dsr & 0x10) printk (",SELECT");
121 if (dsr & 0x08) printk (",N-FAULT");
122 printk ("]\n");
123 return;
124}
125#else /* !DEBUG_PARPORT */
126#define dump_parport_state(args...)
127#endif /* !DEBUG_PARPORT */
128
129/* __parport_pc_frob_control differs from parport_pc_frob_control in that
130 * it doesn't do any extra masking. */
131static __inline__ unsigned char __parport_pc_frob_control (struct parport *p,
132 unsigned char mask,
133 unsigned char val)
134{
135 struct parport_pc_private *priv = p->physport->private_data;
136 unsigned char ctr = priv->ctr;
137#ifdef DEBUG_PARPORT
138 printk (KERN_DEBUG
139 "__parport_pc_frob_control(%02x,%02x): %02x -> %02x\n",
140 mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
141#endif
142 ctr = (ctr & ~mask) ^ val;
143 ctr &= priv->ctr_writable; /* only write writable bits. */
144 outb (ctr, CONTROL (p));
145 priv->ctr = ctr; /* Update soft copy */
146 return ctr;
147}
148
149static __inline__ void parport_pc_data_reverse (struct parport *p)
150{
151 __parport_pc_frob_control (p, 0x20, 0x20);
152}
153
154static __inline__ void parport_pc_data_forward (struct parport *p)
155{
156 __parport_pc_frob_control (p, 0x20, 0x00);
157}
158
159static __inline__ void parport_pc_write_control (struct parport *p,
160 unsigned char d)
161{
162 const unsigned char wm = (PARPORT_CONTROL_STROBE |
163 PARPORT_CONTROL_AUTOFD |
164 PARPORT_CONTROL_INIT |
165 PARPORT_CONTROL_SELECT);
166
167 /* Take this out when drivers have adapted to newer interface. */
168 if (d & 0x20) {
169 printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n",
170 p->name, p->cad->name);
171 parport_pc_data_reverse (p);
172 }
173
174 __parport_pc_frob_control (p, wm, d & wm);
175}
176
177static __inline__ unsigned char parport_pc_read_control(struct parport *p)
178{
179 const unsigned char rm = (PARPORT_CONTROL_STROBE |
180 PARPORT_CONTROL_AUTOFD |
181 PARPORT_CONTROL_INIT |
182 PARPORT_CONTROL_SELECT);
183 const struct parport_pc_private *priv = p->physport->private_data;
184 return priv->ctr & rm; /* Use soft copy */
185}
186
187static __inline__ unsigned char parport_pc_frob_control (struct parport *p,
188 unsigned char mask,
189 unsigned char val)
190{
191 const unsigned char wm = (PARPORT_CONTROL_STROBE |
192 PARPORT_CONTROL_AUTOFD |
193 PARPORT_CONTROL_INIT |
194 PARPORT_CONTROL_SELECT);
195
196 /* Take this out when drivers have adapted to newer interface. */
197 if (mask & 0x20) {
198 printk (KERN_DEBUG "%s (%s): use data_%s for this!\n",
199 p->name, p->cad->name,
200 (val & 0x20) ? "reverse" : "forward");
201 if (val & 0x20)
202 parport_pc_data_reverse (p);
203 else
204 parport_pc_data_forward (p);
205 }
206
207 /* Restrict mask and val to control lines. */
208 mask &= wm;
209 val &= wm;
210
211 return __parport_pc_frob_control (p, mask, val);
212}
213
214static __inline__ unsigned char parport_pc_read_status(struct parport *p)
215{
216 return inb(STATUS(p));
217}
218
219
220static __inline__ void parport_pc_disable_irq(struct parport *p)
221{
222 __parport_pc_frob_control (p, 0x10, 0x00);
223}
224
225static __inline__ void parport_pc_enable_irq(struct parport *p)
226{
227 __parport_pc_frob_control (p, 0x10, 0x10);
228}
229
230extern void parport_pc_release_resources(struct parport *p);
231
232extern int parport_pc_claim_resources(struct parport *p);
233
234/* PCMCIA code will want to get us to look at a port. Provide a mechanism. */
235extern struct parport *parport_pc_probe_port(unsigned long base,
236 unsigned long base_hi,
237 int irq, int dma,
238 struct device *dev,
239 int irqflags);
240extern void parport_pc_unregister_port(struct parport *p);
241
242#endif