File: /usr/include/linux/parport_pc.h
1 #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
18 struct 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;
41 struct pci_dev *dev;
42 };
43
44 extern __inline__ void parport_pc_write_data(struct parport *p, unsigned char d)
45 {
46 #ifdef DEBUG_PARPORT
47 printk (KERN_DEBUG "parport_pc_write_data(%p,0x%02x)\n", p, d);
48 #endif
49 outb(d, DATA(p));
50 }
51
52 extern __inline__ unsigned char parport_pc_read_data(struct parport *p)
53 {
54 unsigned char val = inb (DATA (p));
55 #ifdef DEBUG_PARPORT
56 printk (KERN_DEBUG "parport_pc_read_data(%p) = 0x%02x\n",
57 p, val);
58 #endif
59 return val;
60 }
61
62 /* __parport_pc_frob_control differs from parport_pc_frob_control in that
63 * it doesn't do any extra masking. */
64 static __inline__ unsigned char __parport_pc_frob_control (struct parport *p,
65 unsigned char mask,
66 unsigned char val)
67 {
68 struct parport_pc_private *priv = p->physport->private_data;
69 unsigned char ctr = priv->ctr;
70 #ifdef DEBUG_PARPORT
71 printk (KERN_DEBUG
72 "__parport_pc_frob_control(%02x,%02x): %02x -> %02x\n",
73 mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
74 #endif
75 ctr = (ctr & ~mask) ^ val;
76 ctr &= priv->ctr_writable; /* only write writable bits. */
77 outb (ctr, CONTROL (p));
78 priv->ctr = ctr; /* Update soft copy */
79 return ctr;
80 }
81
82 extern __inline__ void parport_pc_data_reverse (struct parport *p)
83 {
84 __parport_pc_frob_control (p, 0x20, 0x20);
85 }
86
87 extern __inline__ void parport_pc_data_forward (struct parport *p)
88 {
89 __parport_pc_frob_control (p, 0x20, 0x00);
90 }
91
92 extern __inline__ void parport_pc_write_control (struct parport *p,
93 unsigned char d)
94 {
95 const unsigned char wm = (PARPORT_CONTROL_STROBE |
96 PARPORT_CONTROL_AUTOFD |
97 PARPORT_CONTROL_INIT |
98 PARPORT_CONTROL_SELECT);
99
100 /* Take this out when drivers have adapted to newer interface. */
101 if (d & 0x20) {
102 printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n",
103 p->name, p->cad->name);
104 parport_pc_data_reverse (p);
105 }
106
107 __parport_pc_frob_control (p, wm, d & wm);
108 }
109
110 extern __inline__ unsigned char parport_pc_read_control(struct parport *p)
111 {
112 const unsigned char rm = (PARPORT_CONTROL_STROBE |
113 PARPORT_CONTROL_AUTOFD |
114 PARPORT_CONTROL_INIT |
115 PARPORT_CONTROL_SELECT);
116 const struct parport_pc_private *priv = p->physport->private_data;
117 return priv->ctr & rm; /* Use soft copy */
118 }
119
120 extern __inline__ unsigned char parport_pc_frob_control (struct parport *p,
121 unsigned char mask,
122 unsigned char val)
123 {
124 const unsigned char wm = (PARPORT_CONTROL_STROBE |
125 PARPORT_CONTROL_AUTOFD |
126 PARPORT_CONTROL_INIT |
127 PARPORT_CONTROL_SELECT);
128
129 /* Take this out when drivers have adapted to newer interface. */
130 if (mask & 0x20) {
131 printk (KERN_DEBUG "%s (%s): use data_%s for this!\n",
132 p->name, p->cad->name,
133 (val & 0x20) ? "reverse" : "forward");
134 if (val & 0x20)
135 parport_pc_data_reverse (p);
136 else
137 parport_pc_data_forward (p);
138 }
139
140 /* Restrict mask and val to control lines. */
141 mask &= wm;
142 val &= wm;
143
144 return __parport_pc_frob_control (p, mask, val);
145 }
146
147 extern __inline__ unsigned char parport_pc_read_status(struct parport *p)
148 {
149 return inb(STATUS(p));
150 }
151
152
153 extern __inline__ void parport_pc_disable_irq(struct parport *p)
154 {
155 __parport_pc_frob_control (p, 0x10, 0x00);
156 }
157
158 extern __inline__ void parport_pc_enable_irq(struct parport *p)
159 {
160 __parport_pc_frob_control (p, 0x10, 0x10);
161 }
162
163 extern void parport_pc_release_resources(struct parport *p);
164
165 extern int parport_pc_claim_resources(struct parport *p);
166
167 extern void parport_pc_init_state(struct pardevice *, struct parport_state *s);
168
169 extern void parport_pc_save_state(struct parport *p, struct parport_state *s);
170
171 extern void parport_pc_restore_state(struct parport *p, struct parport_state *s);
172
173 extern void parport_pc_inc_use_count(void);
174
175 extern void parport_pc_dec_use_count(void);
176
177 /* PCMCIA code will want to get us to look at a port. Provide a mechanism. */
178 extern struct parport *parport_pc_probe_port (unsigned long base,
179 unsigned long base_hi,
180 int irq, int dma,
181 struct pci_dev *dev);
182
183 #endif
184