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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
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 | ||
19 | struct 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 | ||
6640727f MR |
29 | /* Bitmask of writable ECR bits. */ |
30 | unsigned char ecr_writable; | |
31 | ||
1da177e4 LT |
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; | |
1da177e4 LT |
45 | struct list_head list; |
46 | struct parport *port; | |
47 | }; | |
48 | ||
49 | struct 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 | ||
66 | static __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 | ||
74 | static __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 | |
81684ee6 | 85 | static inline void dump_parport_state (char *str, struct parport *p) |
1da177e4 LT |
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)); | |
110bee75 | 91 | static const char *const ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"}; |
68799398 | 92 | const struct parport_pc_private *priv = p->physport->private_data; |
1da177e4 LT |
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. */ | |
131 | static __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 | ||
149 | static __inline__ void parport_pc_data_reverse (struct parport *p) | |
150 | { | |
151 | __parport_pc_frob_control (p, 0x20, 0x20); | |
152 | } | |
153 | ||
154 | static __inline__ void parport_pc_data_forward (struct parport *p) | |
155 | { | |
156 | __parport_pc_frob_control (p, 0x20, 0x00); | |
157 | } | |
158 | ||
159 | static __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 | ||
177 | static __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 | ||
187 | static __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 | ||
214 | static __inline__ unsigned char parport_pc_read_status(struct parport *p) | |
215 | { | |
216 | return inb(STATUS(p)); | |
217 | } | |
218 | ||
219 | ||
220 | static __inline__ void parport_pc_disable_irq(struct parport *p) | |
221 | { | |
222 | __parport_pc_frob_control (p, 0x10, 0x00); | |
223 | } | |
224 | ||
225 | static __inline__ void parport_pc_enable_irq(struct parport *p) | |
226 | { | |
227 | __parport_pc_frob_control (p, 0x10, 0x10); | |
228 | } | |
229 | ||
230 | extern void parport_pc_release_resources(struct parport *p); | |
231 | ||
232 | extern 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. */ | |
51dcdfec AC |
235 | extern 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); | |
240 | extern void parport_pc_unregister_port(struct parport *p); | |
1da177e4 LT |
241 | |
242 | #endif |