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1da177e4 LT |
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; | |
1da177e4 LT |
41 | struct list_head list; |
42 | struct parport *port; | |
43 | }; | |
44 | ||
45 | struct 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 | ||
62 | static __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 | ||
70 | static __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 | |
81684ee6 | 81 | static inline void dump_parport_state (char *str, struct parport *p) |
1da177e4 LT |
82 | { |
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)); | |
110bee75 | 87 | static const char *const ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"}; |
68799398 | 88 | const struct parport_pc_private *priv = p->physport->private_data; |
1da177e4 LT |
89 | 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. */ | |
127 | static __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 | ||
145 | static __inline__ void parport_pc_data_reverse (struct parport *p) | |
146 | { | |
147 | __parport_pc_frob_control (p, 0x20, 0x20); | |
148 | } | |
149 | ||
150 | static __inline__ void parport_pc_data_forward (struct parport *p) | |
151 | { | |
152 | __parport_pc_frob_control (p, 0x20, 0x00); | |
153 | } | |
154 | ||
155 | static __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 | ||
173 | static __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 | ||
183 | static __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 | ||
210 | static __inline__ unsigned char parport_pc_read_status(struct parport *p) | |
211 | { | |
212 | return inb(STATUS(p)); | |
213 | } | |
214 | ||
215 | ||
216 | static __inline__ void parport_pc_disable_irq(struct parport *p) | |
217 | { | |
218 | __parport_pc_frob_control (p, 0x10, 0x00); | |
219 | } | |
220 | ||
221 | static __inline__ void parport_pc_enable_irq(struct parport *p) | |
222 | { | |
223 | __parport_pc_frob_control (p, 0x10, 0x10); | |
224 | } | |
225 | ||
226 | extern void parport_pc_release_resources(struct parport *p); | |
227 | ||
228 | extern 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. */ | |
231 | extern struct parport *parport_pc_probe_port (unsigned long base, | |
232 | unsigned long base_hi, | |
233 | int irq, int dma, | |
c15a3837 | 234 | struct device *dev); |
1da177e4 LT |
235 | extern void parport_pc_unregister_port (struct parport *p); |
236 | ||
237 | #endif |