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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __LINUX_PARPORT_PC_H
2#define __LINUX_PARPORT_PC_H
3
4#include <asm/io.h>
5
6/* --- register definitions ------------------------------- */
7
8#define ECONTROL(p) ((p)->base_hi + 0x2)
9#define CONFIGB(p) ((p)->base_hi + 0x1)
10#define CONFIGA(p) ((p)->base_hi + 0x0)
11#define FIFO(p) ((p)->base_hi + 0x0)
12#define EPPDATA(p) ((p)->base + 0x4)
13#define EPPADDR(p) ((p)->base + 0x3)
14#define CONTROL(p) ((p)->base + 0x2)
15#define STATUS(p) ((p)->base + 0x1)
16#define DATA(p) ((p)->base + 0x0)
17
18struct parport_pc_private {
19 /* Contents of CTR. */
20 unsigned char ctr;
21
22 /* Bitmask of writable CTR bits. */
23 unsigned char ctr_writable;
24
25 /* Whether or not there's an ECR. */
26 int ecr;
27
28 /* Number of PWords that FIFO will hold. */
29 int fifo_depth;
30
31 /* Number of bytes per portword. */
32 int pword;
33
34 /* Not used yet. */
35 int readIntrThreshold;
36 int writeIntrThreshold;
37
38 /* buffer suitable for DMA, if DMA enabled */
39 char *dma_buf;
40 dma_addr_t dma_handle;
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 struct list_head list;
42 struct parport *port;
43};
44
45struct parport_pc_via_data
46{
47 /* ISA PnP IRQ routing register 1 */
48 u8 via_pci_parport_irq_reg;
49 /* ISA PnP DMA request routing register */
50 u8 via_pci_parport_dma_reg;
51 /* Register and value to enable SuperIO configuration access */
52 u8 via_pci_superio_config_reg;
53 u8 via_pci_superio_config_data;
54 /* SuperIO function register number */
55 u8 viacfg_function;
56 /* parallel port control register number */
57 u8 viacfg_parport_control;
58 /* Parallel port base address register */
59 u8 viacfg_parport_base;
60};
61
62static __inline__ void parport_pc_write_data(struct parport *p, unsigned char d)
63{
64#ifdef DEBUG_PARPORT
65 printk (KERN_DEBUG "parport_pc_write_data(%p,0x%02x)\n", p, d);
66#endif
67 outb(d, DATA(p));
68}
69
70static __inline__ unsigned char parport_pc_read_data(struct parport *p)
71{
72 unsigned char val = inb (DATA (p));
73#ifdef DEBUG_PARPORT
74 printk (KERN_DEBUG "parport_pc_read_data(%p) = 0x%02x\n",
75 p, val);
76#endif
77 return val;
78}
79
80#ifdef DEBUG_PARPORT
Adrian Bunk81684ee2006-01-06 00:19:53 -080081static inline void dump_parport_state (char *str, struct parport *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070082{
83 /* here's hoping that reading these ports won't side-effect anything underneath */
84 unsigned char ecr = inb (ECONTROL (p));
85 unsigned char dcr = inb (CONTROL (p));
86 unsigned char dsr = inb (STATUS (p));
Marko Kohtala110bee72006-01-06 00:19:49 -080087 static const char *const ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"};
Dave Jones68799392005-12-12 00:37:35 -080088 const struct parport_pc_private *priv = p->physport->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 int i;
90
91 printk (KERN_DEBUG "*** parport state (%s): ecr=[%s", str, ecr_modes[(ecr & 0xe0) >> 5]);
92 if (ecr & 0x10) printk (",nErrIntrEn");
93 if (ecr & 0x08) printk (",dmaEn");
94 if (ecr & 0x04) printk (",serviceIntr");
95 if (ecr & 0x02) printk (",f_full");
96 if (ecr & 0x01) printk (",f_empty");
97 for (i=0; i<2; i++) {
98 printk ("] dcr(%s)=[", i ? "soft" : "hard");
99 dcr = i ? priv->ctr : inb (CONTROL (p));
100
101 if (dcr & 0x20) {
102 printk ("rev");
103 } else {
104 printk ("fwd");
105 }
106 if (dcr & 0x10) printk (",ackIntEn");
107 if (!(dcr & 0x08)) printk (",N-SELECT-IN");
108 if (dcr & 0x04) printk (",N-INIT");
109 if (!(dcr & 0x02)) printk (",N-AUTOFD");
110 if (!(dcr & 0x01)) printk (",N-STROBE");
111 }
112 printk ("] dsr=[");
113 if (!(dsr & 0x80)) printk ("BUSY");
114 if (dsr & 0x40) printk (",N-ACK");
115 if (dsr & 0x20) printk (",PERROR");
116 if (dsr & 0x10) printk (",SELECT");
117 if (dsr & 0x08) printk (",N-FAULT");
118 printk ("]\n");
119 return;
120}
121#else /* !DEBUG_PARPORT */
122#define dump_parport_state(args...)
123#endif /* !DEBUG_PARPORT */
124
125/* __parport_pc_frob_control differs from parport_pc_frob_control in that
126 * it doesn't do any extra masking. */
127static __inline__ unsigned char __parport_pc_frob_control (struct parport *p,
128 unsigned char mask,
129 unsigned char val)
130{
131 struct parport_pc_private *priv = p->physport->private_data;
132 unsigned char ctr = priv->ctr;
133#ifdef DEBUG_PARPORT
134 printk (KERN_DEBUG
135 "__parport_pc_frob_control(%02x,%02x): %02x -> %02x\n",
136 mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
137#endif
138 ctr = (ctr & ~mask) ^ val;
139 ctr &= priv->ctr_writable; /* only write writable bits. */
140 outb (ctr, CONTROL (p));
141 priv->ctr = ctr; /* Update soft copy */
142 return ctr;
143}
144
145static __inline__ void parport_pc_data_reverse (struct parport *p)
146{
147 __parport_pc_frob_control (p, 0x20, 0x20);
148}
149
150static __inline__ void parport_pc_data_forward (struct parport *p)
151{
152 __parport_pc_frob_control (p, 0x20, 0x00);
153}
154
155static __inline__ void parport_pc_write_control (struct parport *p,
156 unsigned char d)
157{
158 const unsigned char wm = (PARPORT_CONTROL_STROBE |
159 PARPORT_CONTROL_AUTOFD |
160 PARPORT_CONTROL_INIT |
161 PARPORT_CONTROL_SELECT);
162
163 /* Take this out when drivers have adapted to newer interface. */
164 if (d & 0x20) {
165 printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n",
166 p->name, p->cad->name);
167 parport_pc_data_reverse (p);
168 }
169
170 __parport_pc_frob_control (p, wm, d & wm);
171}
172
173static __inline__ unsigned char parport_pc_read_control(struct parport *p)
174{
175 const unsigned char rm = (PARPORT_CONTROL_STROBE |
176 PARPORT_CONTROL_AUTOFD |
177 PARPORT_CONTROL_INIT |
178 PARPORT_CONTROL_SELECT);
179 const struct parport_pc_private *priv = p->physport->private_data;
180 return priv->ctr & rm; /* Use soft copy */
181}
182
183static __inline__ unsigned char parport_pc_frob_control (struct parport *p,
184 unsigned char mask,
185 unsigned char val)
186{
187 const unsigned char wm = (PARPORT_CONTROL_STROBE |
188 PARPORT_CONTROL_AUTOFD |
189 PARPORT_CONTROL_INIT |
190 PARPORT_CONTROL_SELECT);
191
192 /* Take this out when drivers have adapted to newer interface. */
193 if (mask & 0x20) {
194 printk (KERN_DEBUG "%s (%s): use data_%s for this!\n",
195 p->name, p->cad->name,
196 (val & 0x20) ? "reverse" : "forward");
197 if (val & 0x20)
198 parport_pc_data_reverse (p);
199 else
200 parport_pc_data_forward (p);
201 }
202
203 /* Restrict mask and val to control lines. */
204 mask &= wm;
205 val &= wm;
206
207 return __parport_pc_frob_control (p, mask, val);
208}
209
210static __inline__ unsigned char parport_pc_read_status(struct parport *p)
211{
212 return inb(STATUS(p));
213}
214
215
216static __inline__ void parport_pc_disable_irq(struct parport *p)
217{
218 __parport_pc_frob_control (p, 0x10, 0x00);
219}
220
221static __inline__ void parport_pc_enable_irq(struct parport *p)
222{
223 __parport_pc_frob_control (p, 0x10, 0x10);
224}
225
226extern void parport_pc_release_resources(struct parport *p);
227
228extern int parport_pc_claim_resources(struct parport *p);
229
230/* PCMCIA code will want to get us to look at a port. Provide a mechanism. */
231extern struct parport *parport_pc_probe_port (unsigned long base,
232 unsigned long base_hi,
233 int irq, int dma,
David Brownellc15a3832007-05-08 00:27:35 -0700234 struct device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235extern void parport_pc_unregister_port (struct parport *p);
236
237#endif