File: /usr/src/linux/include/asm-parisc/parport_gsc.h
1 #ifndef __LINUX_PARPORT_GSC_H
2 #define __LINUX_PARPORT_GSC_H
3
4 #include <asm/io.h>
5 #include <linux/delay.h>
6
7 #undef DEBUG_PARPORT /* undefine for production */
8 #define DELAY_TIME 0
9
10 #if DELAY_TIME == 0
11 #define parport_readb gsc_readb
12 #define parport_writeb gsc_writeb
13 #else
14 static __inline__ unsigned char parport_readb( unsigned long port )
15 {
16 udelay(DELAY_TIME);
17 return gsc_readb(port);
18 }
19
20 static __inline__ void parport_writeb( unsigned char value, unsigned long port )
21 {
22 gsc_writeb(value,port);
23 udelay(DELAY_TIME);
24 }
25 #endif
26
27 /* --- register definitions ------------------------------- */
28
29 #define EPPDATA(p) ((p)->base + 0x4)
30 #define EPPADDR(p) ((p)->base + 0x3)
31 #define CONTROL(p) ((p)->base + 0x2)
32 #define STATUS(p) ((p)->base + 0x1)
33 #define DATA(p) ((p)->base + 0x0)
34
35 struct parport_gsc_private {
36 /* Contents of CTR. */
37 unsigned char ctr;
38
39 /* Bitmask of writable CTR bits. */
40 unsigned char ctr_writable;
41
42 /* Number of bytes per portword. */
43 int pword;
44
45 /* Not used yet. */
46 int readIntrThreshold;
47 int writeIntrThreshold;
48
49 /* buffer suitable for DMA, if DMA enabled */
50 char *dma_buf;
51 dma_addr_t dma_handle;
52 struct pci_dev *dev;
53 };
54
55 extern __inline__ void parport_gsc_write_data(struct parport *p, unsigned char d)
56 {
57 #ifdef DEBUG_PARPORT
58 printk (KERN_DEBUG "parport_gsc_write_data(%p,0x%02x)\n", p, d);
59 #endif
60 parport_writeb(d, DATA(p));
61 }
62
63 extern __inline__ unsigned char parport_gsc_read_data(struct parport *p)
64 {
65 unsigned char val = parport_readb (DATA (p));
66 #ifdef DEBUG_PARPORT
67 printk (KERN_DEBUG "parport_gsc_read_data(%p) = 0x%02x\n",
68 p, val);
69 #endif
70 return val;
71 }
72
73 /* __parport_gsc_frob_control differs from parport_gsc_frob_control in that
74 * it doesn't do any extra masking. */
75 static __inline__ unsigned char __parport_gsc_frob_control (struct parport *p,
76 unsigned char mask,
77 unsigned char val)
78 {
79 struct parport_gsc_private *priv = p->physport->private_data;
80 unsigned char ctr = priv->ctr;
81 #ifdef DEBUG_PARPORT
82 printk (KERN_DEBUG
83 "__parport_gsc_frob_control(%02x,%02x): %02x -> %02x\n",
84 mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
85 #endif
86 ctr = (ctr & ~mask) ^ val;
87 ctr &= priv->ctr_writable; /* only write writable bits. */
88 parport_writeb (ctr, CONTROL (p));
89 priv->ctr = ctr; /* Update soft copy */
90 return ctr;
91 }
92
93 extern __inline__ void parport_gsc_data_reverse (struct parport *p)
94 {
95 __parport_gsc_frob_control (p, 0x20, 0x20);
96 }
97
98 extern __inline__ void parport_gsc_data_forward (struct parport *p)
99 {
100 __parport_gsc_frob_control (p, 0x20, 0x00);
101 }
102
103 extern __inline__ void parport_gsc_write_control (struct parport *p,
104 unsigned char d)
105 {
106 const unsigned char wm = (PARPORT_CONTROL_STROBE |
107 PARPORT_CONTROL_AUTOFD |
108 PARPORT_CONTROL_INIT |
109 PARPORT_CONTROL_SELECT);
110
111 /* Take this out when drivers have adapted to newer interface. */
112 if (d & 0x20) {
113 printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n",
114 p->name, p->cad->name);
115 parport_gsc_data_reverse (p);
116 }
117
118 __parport_gsc_frob_control (p, wm, d & wm);
119 }
120
121 extern __inline__ unsigned char parport_gsc_read_control(struct parport *p)
122 {
123 const unsigned char rm = (PARPORT_CONTROL_STROBE |
124 PARPORT_CONTROL_AUTOFD |
125 PARPORT_CONTROL_INIT |
126 PARPORT_CONTROL_SELECT);
127 const struct parport_gsc_private *priv = p->physport->private_data;
128 return priv->ctr & rm; /* Use soft copy */
129 }
130
131 extern __inline__ unsigned char parport_gsc_frob_control (struct parport *p,
132 unsigned char mask,
133 unsigned char val)
134 {
135 const unsigned char wm = (PARPORT_CONTROL_STROBE |
136 PARPORT_CONTROL_AUTOFD |
137 PARPORT_CONTROL_INIT |
138 PARPORT_CONTROL_SELECT);
139
140 /* Take this out when drivers have adapted to newer interface. */
141 if (mask & 0x20) {
142 printk (KERN_DEBUG "%s (%s): use data_%s for this!\n",
143 p->name, p->cad->name,
144 (val & 0x20) ? "reverse" : "forward");
145 if (val & 0x20)
146 parport_gsc_data_reverse (p);
147 else
148 parport_gsc_data_forward (p);
149 }
150
151 /* Restrict mask and val to control lines. */
152 mask &= wm;
153 val &= wm;
154
155 return __parport_gsc_frob_control (p, mask, val);
156 }
157
158 extern __inline__ unsigned char parport_gsc_read_status(struct parport *p)
159 {
160 return parport_readb (STATUS(p));
161 }
162
163
164 extern __inline__ void parport_gsc_disable_irq(struct parport *p)
165 {
166 __parport_gsc_frob_control (p, 0x10, 0x00);
167 }
168
169 extern __inline__ void parport_gsc_enable_irq(struct parport *p)
170 {
171 __parport_gsc_frob_control (p, 0x10, 0x10);
172 }
173
174 extern void parport_gsc_release_resources(struct parport *p);
175
176 extern int parport_gsc_claim_resources(struct parport *p);
177
178 extern void parport_gsc_init_state(struct pardevice *, struct parport_state *s);
179
180 extern void parport_gsc_save_state(struct parport *p, struct parport_state *s);
181
182 extern void parport_gsc_restore_state(struct parport *p, struct parport_state *s);
183
184 extern void parport_gsc_inc_use_count(void);
185
186 extern void parport_gsc_dec_use_count(void);
187
188 extern struct parport *parport_gsc_probe_port (unsigned long base,
189 unsigned long base_hi,
190 int irq, int dma,
191 struct pci_dev *dev);
192
193 #endif
194