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 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
parport_pc_write_data(struct parport * p,unsigned char d)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
parport_pc_read_data(struct parport * p)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
dump_parport_state(char * str,struct parport * p)81 static inline void dump_parport_state (char *str, struct parport *p)
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));
87 static const char *const ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"};
88 const struct parport_pc_private *priv = p->physport->private_data;
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. */
__parport_pc_frob_control(struct parport * p,unsigned char mask,unsigned char val)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
parport_pc_data_reverse(struct parport * p)145 static __inline__ void parport_pc_data_reverse (struct parport *p)
146 {
147 __parport_pc_frob_control (p, 0x20, 0x20);
148 }
149
parport_pc_data_forward(struct parport * p)150 static __inline__ void parport_pc_data_forward (struct parport *p)
151 {
152 __parport_pc_frob_control (p, 0x20, 0x00);
153 }
154
parport_pc_write_control(struct parport * p,unsigned char d)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
parport_pc_read_control(struct parport * p)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
parport_pc_frob_control(struct parport * p,unsigned char mask,unsigned char val)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
parport_pc_read_status(struct parport * p)210 static __inline__ unsigned char parport_pc_read_status(struct parport *p)
211 {
212 return inb(STATUS(p));
213 }
214
215
parport_pc_disable_irq(struct parport * p)216 static __inline__ void parport_pc_disable_irq(struct parport *p)
217 {
218 __parport_pc_frob_control (p, 0x10, 0x00);
219 }
220
parport_pc_enable_irq(struct parport * p)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,
234 struct device *dev,
235 int irqflags);
236 extern void parport_pc_unregister_port(struct parport *p);
237
238 #endif
239