1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_PARPORT_PC_H 2 #ifndef __LINUX_PARPORT_PC_H
3 #define __LINUX_PARPORT_PC_H 3 #define __LINUX_PARPORT_PC_H
4 4
5 #include <asm/io.h> 5 #include <asm/io.h>
6 6
7 /* --- register definitions ------------------ 7 /* --- register definitions ------------------------------- */
8 8
9 #define ECONTROL(p) ((p)->base_hi + 0x2) 9 #define ECONTROL(p) ((p)->base_hi + 0x2)
10 #define CONFIGB(p) ((p)->base_hi + 0x1) 10 #define CONFIGB(p) ((p)->base_hi + 0x1)
11 #define CONFIGA(p) ((p)->base_hi + 0x0) 11 #define CONFIGA(p) ((p)->base_hi + 0x0)
12 #define FIFO(p) ((p)->base_hi + 0x0) 12 #define FIFO(p) ((p)->base_hi + 0x0)
13 #define EPPDATA(p) ((p)->base + 0x4) 13 #define EPPDATA(p) ((p)->base + 0x4)
14 #define EPPADDR(p) ((p)->base + 0x3) 14 #define EPPADDR(p) ((p)->base + 0x3)
15 #define CONTROL(p) ((p)->base + 0x2) 15 #define CONTROL(p) ((p)->base + 0x2)
16 #define STATUS(p) ((p)->base + 0x1) 16 #define STATUS(p) ((p)->base + 0x1)
17 #define DATA(p) ((p)->base + 0x0) 17 #define DATA(p) ((p)->base + 0x0)
18 18
19 struct parport_pc_private { 19 struct parport_pc_private {
20 /* Contents of CTR. */ 20 /* Contents of CTR. */
21 unsigned char ctr; 21 unsigned char ctr;
22 22
23 /* Bitmask of writable CTR bits. */ 23 /* Bitmask of writable CTR bits. */
24 unsigned char ctr_writable; 24 unsigned char ctr_writable;
25 25
26 /* Whether or not there's an ECR. */ 26 /* Whether or not there's an ECR. */
27 int ecr; 27 int ecr;
28 28
29 /* Bitmask of writable ECR bits. */ 29 /* Bitmask of writable ECR bits. */
30 unsigned char ecr_writable; 30 unsigned char ecr_writable;
31 31
32 /* Number of PWords that FIFO will hol 32 /* Number of PWords that FIFO will hold. */
33 int fifo_depth; 33 int fifo_depth;
34 34
35 /* Number of bytes per portword. */ 35 /* Number of bytes per portword. */
36 int pword; 36 int pword;
37 37
38 /* Not used yet. */ 38 /* Not used yet. */
39 int readIntrThreshold; 39 int readIntrThreshold;
40 int writeIntrThreshold; 40 int writeIntrThreshold;
41 41
42 /* buffer suitable for DMA, if DMA ena 42 /* buffer suitable for DMA, if DMA enabled */
43 char *dma_buf; 43 char *dma_buf;
44 dma_addr_t dma_handle; 44 dma_addr_t dma_handle;
45 struct list_head list; 45 struct list_head list;
46 struct parport *port; 46 struct parport *port;
47 }; 47 };
48 48
49 struct parport_pc_via_data 49 struct parport_pc_via_data
50 { 50 {
51 /* ISA PnP IRQ routing register 1 */ 51 /* ISA PnP IRQ routing register 1 */
52 u8 via_pci_parport_irq_reg; 52 u8 via_pci_parport_irq_reg;
53 /* ISA PnP DMA request routing registe 53 /* ISA PnP DMA request routing register */
54 u8 via_pci_parport_dma_reg; 54 u8 via_pci_parport_dma_reg;
55 /* Register and value to enable SuperI 55 /* Register and value to enable SuperIO configuration access */
56 u8 via_pci_superio_config_reg; 56 u8 via_pci_superio_config_reg;
57 u8 via_pci_superio_config_data; 57 u8 via_pci_superio_config_data;
58 /* SuperIO function register number */ 58 /* SuperIO function register number */
59 u8 viacfg_function; 59 u8 viacfg_function;
60 /* parallel port control register numb 60 /* parallel port control register number */
61 u8 viacfg_parport_control; 61 u8 viacfg_parport_control;
62 /* Parallel port base address register 62 /* Parallel port base address register */
63 u8 viacfg_parport_base; 63 u8 viacfg_parport_base;
64 }; 64 };
65 65
66 static __inline__ void parport_pc_write_data(s 66 static __inline__ void parport_pc_write_data(struct parport *p, unsigned char d)
67 { 67 {
68 #ifdef DEBUG_PARPORT 68 #ifdef DEBUG_PARPORT
69 printk (KERN_DEBUG "parport_pc_write_d 69 printk (KERN_DEBUG "parport_pc_write_data(%p,0x%02x)\n", p, d);
70 #endif 70 #endif
71 outb(d, DATA(p)); 71 outb(d, DATA(p));
72 } 72 }
73 73
74 static __inline__ unsigned char parport_pc_rea 74 static __inline__ unsigned char parport_pc_read_data(struct parport *p)
75 { 75 {
76 unsigned char val = inb (DATA (p)); 76 unsigned char val = inb (DATA (p));
77 #ifdef DEBUG_PARPORT 77 #ifdef DEBUG_PARPORT
78 printk (KERN_DEBUG "parport_pc_read_da 78 printk (KERN_DEBUG "parport_pc_read_data(%p) = 0x%02x\n",
79 p, val); 79 p, val);
80 #endif 80 #endif
81 return val; 81 return val;
82 } 82 }
83 83
84 #ifdef DEBUG_PARPORT 84 #ifdef DEBUG_PARPORT
85 static inline void dump_parport_state (char *s 85 static inline void dump_parport_state (char *str, struct parport *p)
86 { 86 {
87 /* here's hoping that reading these po 87 /* here's hoping that reading these ports won't side-effect anything underneath */
88 unsigned char ecr = inb (ECONTROL (p)) 88 unsigned char ecr = inb (ECONTROL (p));
89 unsigned char dcr = inb (CONTROL (p)); 89 unsigned char dcr = inb (CONTROL (p));
90 unsigned char dsr = inb (STATUS (p)); 90 unsigned char dsr = inb (STATUS (p));
91 static const char *const ecr_modes[] = 91 static const char *const ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"};
92 const struct parport_pc_private *priv 92 const struct parport_pc_private *priv = p->physport->private_data;
93 int i; 93 int i;
94 94
95 printk (KERN_DEBUG "*** parport state 95 printk (KERN_DEBUG "*** parport state (%s): ecr=[%s", str, ecr_modes[(ecr & 0xe0) >> 5]);
96 if (ecr & 0x10) printk (",nErrIntrEn") 96 if (ecr & 0x10) printk (",nErrIntrEn");
97 if (ecr & 0x08) printk (",dmaEn"); 97 if (ecr & 0x08) printk (",dmaEn");
98 if (ecr & 0x04) printk (",serviceIntr" 98 if (ecr & 0x04) printk (",serviceIntr");
99 if (ecr & 0x02) printk (",f_full"); 99 if (ecr & 0x02) printk (",f_full");
100 if (ecr & 0x01) printk (",f_empty"); 100 if (ecr & 0x01) printk (",f_empty");
101 for (i=0; i<2; i++) { 101 for (i=0; i<2; i++) {
102 printk ("] dcr(%s)=[", i ? "s 102 printk ("] dcr(%s)=[", i ? "soft" : "hard");
103 dcr = i ? priv->ctr : inb (CON 103 dcr = i ? priv->ctr : inb (CONTROL (p));
104 104
105 if (dcr & 0x20) { 105 if (dcr & 0x20) {
106 printk ("rev"); 106 printk ("rev");
107 } else { 107 } else {
108 printk ("fwd"); 108 printk ("fwd");
109 } 109 }
110 if (dcr & 0x10) printk (",ackI 110 if (dcr & 0x10) printk (",ackIntEn");
111 if (!(dcr & 0x08)) printk (",N 111 if (!(dcr & 0x08)) printk (",N-SELECT-IN");
112 if (dcr & 0x04) printk (",N-IN 112 if (dcr & 0x04) printk (",N-INIT");
113 if (!(dcr & 0x02)) printk (",N 113 if (!(dcr & 0x02)) printk (",N-AUTOFD");
114 if (!(dcr & 0x01)) printk (",N 114 if (!(dcr & 0x01)) printk (",N-STROBE");
115 } 115 }
116 printk ("] dsr=["); 116 printk ("] dsr=[");
117 if (!(dsr & 0x80)) printk ("BUSY"); 117 if (!(dsr & 0x80)) printk ("BUSY");
118 if (dsr & 0x40) printk (",N-ACK"); 118 if (dsr & 0x40) printk (",N-ACK");
119 if (dsr & 0x20) printk (",PERROR"); 119 if (dsr & 0x20) printk (",PERROR");
120 if (dsr & 0x10) printk (",SELECT"); 120 if (dsr & 0x10) printk (",SELECT");
121 if (dsr & 0x08) printk (",N-FAULT"); 121 if (dsr & 0x08) printk (",N-FAULT");
122 printk ("]\n"); 122 printk ("]\n");
123 return; 123 return;
124 } 124 }
125 #else /* !DEBUG_PARPORT */ 125 #else /* !DEBUG_PARPORT */
126 #define dump_parport_state(args...) 126 #define dump_parport_state(args...)
127 #endif /* !DEBUG_PARPORT */ 127 #endif /* !DEBUG_PARPORT */
128 128
129 /* __parport_pc_frob_control differs from parp 129 /* __parport_pc_frob_control differs from parport_pc_frob_control in that
130 * it doesn't do any extra masking. */ 130 * it doesn't do any extra masking. */
131 static __inline__ unsigned char __parport_pc_f 131 static __inline__ unsigned char __parport_pc_frob_control (struct parport *p,
132 132 unsigned char mask,
133 133 unsigned char val)
134 { 134 {
135 struct parport_pc_private *priv = p->p 135 struct parport_pc_private *priv = p->physport->private_data;
136 unsigned char ctr = priv->ctr; 136 unsigned char ctr = priv->ctr;
137 #ifdef DEBUG_PARPORT 137 #ifdef DEBUG_PARPORT
138 printk (KERN_DEBUG 138 printk (KERN_DEBUG
139 "__parport_pc_frob_control(%02 139 "__parport_pc_frob_control(%02x,%02x): %02x -> %02x\n",
140 mask, val, ctr, ((ctr & ~mask) 140 mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
141 #endif 141 #endif
142 ctr = (ctr & ~mask) ^ val; 142 ctr = (ctr & ~mask) ^ val;
143 ctr &= priv->ctr_writable; /* only wri 143 ctr &= priv->ctr_writable; /* only write writable bits. */
144 outb (ctr, CONTROL (p)); 144 outb (ctr, CONTROL (p));
145 priv->ctr = ctr; /* Update soft 145 priv->ctr = ctr; /* Update soft copy */
146 return ctr; 146 return ctr;
147 } 147 }
148 148
149 static __inline__ void parport_pc_data_reverse 149 static __inline__ void parport_pc_data_reverse (struct parport *p)
150 { 150 {
151 __parport_pc_frob_control (p, 0x20, 0x 151 __parport_pc_frob_control (p, 0x20, 0x20);
152 } 152 }
153 153
154 static __inline__ void parport_pc_data_forward 154 static __inline__ void parport_pc_data_forward (struct parport *p)
155 { 155 {
156 __parport_pc_frob_control (p, 0x20, 0x 156 __parport_pc_frob_control (p, 0x20, 0x00);
157 } 157 }
158 158
159 static __inline__ void parport_pc_write_contro 159 static __inline__ void parport_pc_write_control (struct parport *p,
160 160 unsigned char d)
161 { 161 {
162 const unsigned char wm = (PARPORT_CONT 162 const unsigned char wm = (PARPORT_CONTROL_STROBE |
163 PARPORT_CONT 163 PARPORT_CONTROL_AUTOFD |
164 PARPORT_CONT 164 PARPORT_CONTROL_INIT |
165 PARPORT_CONT 165 PARPORT_CONTROL_SELECT);
166 166
167 /* Take this out when drivers have ada 167 /* Take this out when drivers have adapted to newer interface. */
168 if (d & 0x20) { 168 if (d & 0x20) {
169 printk (KERN_DEBUG "%s (%s): u 169 printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n",
170 p->name, p->cad->name) 170 p->name, p->cad->name);
171 parport_pc_data_reverse (p); 171 parport_pc_data_reverse (p);
172 } 172 }
173 173
174 __parport_pc_frob_control (p, wm, d & 174 __parport_pc_frob_control (p, wm, d & wm);
175 } 175 }
176 176
177 static __inline__ unsigned char parport_pc_rea 177 static __inline__ unsigned char parport_pc_read_control(struct parport *p)
178 { 178 {
179 const unsigned char rm = (PARPORT_CONT 179 const unsigned char rm = (PARPORT_CONTROL_STROBE |
180 PARPORT_CONT 180 PARPORT_CONTROL_AUTOFD |
181 PARPORT_CONT 181 PARPORT_CONTROL_INIT |
182 PARPORT_CONT 182 PARPORT_CONTROL_SELECT);
183 const struct parport_pc_private *priv 183 const struct parport_pc_private *priv = p->physport->private_data;
184 return priv->ctr & rm; /* Use soft cop 184 return priv->ctr & rm; /* Use soft copy */
185 } 185 }
186 186
187 static __inline__ unsigned char parport_pc_fro 187 static __inline__ unsigned char parport_pc_frob_control (struct parport *p,
188 188 unsigned char mask,
189 189 unsigned char val)
190 { 190 {
191 const unsigned char wm = (PARPORT_CONT 191 const unsigned char wm = (PARPORT_CONTROL_STROBE |
192 PARPORT_CONT 192 PARPORT_CONTROL_AUTOFD |
193 PARPORT_CONT 193 PARPORT_CONTROL_INIT |
194 PARPORT_CONT 194 PARPORT_CONTROL_SELECT);
195 195
196 /* Take this out when drivers have ada 196 /* Take this out when drivers have adapted to newer interface. */
197 if (mask & 0x20) { 197 if (mask & 0x20) {
198 printk (KERN_DEBUG "%s (%s): u 198 printk (KERN_DEBUG "%s (%s): use data_%s for this!\n",
199 p->name, p->cad->name, 199 p->name, p->cad->name,
200 (val & 0x20) ? "revers 200 (val & 0x20) ? "reverse" : "forward");
201 if (val & 0x20) 201 if (val & 0x20)
202 parport_pc_data_revers 202 parport_pc_data_reverse (p);
203 else 203 else
204 parport_pc_data_forwar 204 parport_pc_data_forward (p);
205 } 205 }
206 206
207 /* Restrict mask and val to control li 207 /* Restrict mask and val to control lines. */
208 mask &= wm; 208 mask &= wm;
209 val &= wm; 209 val &= wm;
210 210
211 return __parport_pc_frob_control (p, m 211 return __parport_pc_frob_control (p, mask, val);
212 } 212 }
213 213
214 static __inline__ unsigned char parport_pc_rea 214 static __inline__ unsigned char parport_pc_read_status(struct parport *p)
215 { 215 {
216 return inb(STATUS(p)); 216 return inb(STATUS(p));
217 } 217 }
218 218
219 219
220 static __inline__ void parport_pc_disable_irq( 220 static __inline__ void parport_pc_disable_irq(struct parport *p)
221 { 221 {
222 __parport_pc_frob_control (p, 0x10, 0x 222 __parport_pc_frob_control (p, 0x10, 0x00);
223 } 223 }
224 224
225 static __inline__ void parport_pc_enable_irq(s 225 static __inline__ void parport_pc_enable_irq(struct parport *p)
226 { 226 {
227 __parport_pc_frob_control (p, 0x10, 0x 227 __parport_pc_frob_control (p, 0x10, 0x10);
228 } 228 }
229 229
230 extern void parport_pc_release_resources(struc 230 extern void parport_pc_release_resources(struct parport *p);
231 231
232 extern int parport_pc_claim_resources(struct p 232 extern int parport_pc_claim_resources(struct parport *p);
233 233
234 /* PCMCIA code will want to get us to look at 234 /* PCMCIA code will want to get us to look at a port. Provide a mechanism. */
235 extern struct parport *parport_pc_probe_port(u 235 extern struct parport *parport_pc_probe_port(unsigned long base,
236 u 236 unsigned long base_hi,
237 i 237 int irq, int dma,
238 s 238 struct device *dev,
239 i 239 int irqflags);
240 extern void parport_pc_unregister_port(struct 240 extern void parport_pc_unregister_port(struct parport *p);
241 241
242 #endif 242 #endif
243 243
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