1 /* parport_sunbpp.c: Parallel-port routines for SBUS
2 *
3 * Author: Derrick J. Brashear <shadow@dementia.org>
4 *
5 * based on work by:
6 * Phil Blundell <philb@gnu.org>
7 * Tim Waugh <tim@cyberelk.demon.co.uk>
8 * Jose Renau <renau@acm.org>
9 * David Campbell <campbell@tirian.che.curtin.edu.au>
10 * Grant Guenther <grant@torque.net>
11 * Eddie C. Dost <ecd@skynet.be>
12 * Stephen Williams (steve@icarus.com)
13 * Gus Baldauf (gbaldauf@ix.netcom.com)
14 * Peter Zaitcev
15 * Tom Dyas
16 *
17 * Updated to new SBUS device framework: David S. Miller <davem@davemloft.net>
18 *
19 */
20
21 #include <linux/string.h>
22 #include <linux/module.h>
23 #include <linux/delay.h>
24 #include <linux/errno.h>
25 #include <linux/ioport.h>
26 #include <linux/kernel.h>
27 #include <linux/slab.h>
28 #include <linux/init.h>
29 #include <linux/of.h>
30 #include <linux/of_device.h>
31
32 #include <linux/parport.h>
33
34 #include <asm/ptrace.h>
35 #include <linux/interrupt.h>
36
37 #include <asm/io.h>
38 #include <asm/oplib.h> /* OpenProm Library */
39 #include <asm/dma.h> /* BPP uses LSI 64854 for DMA */
40 #include <asm/irq.h>
41 #include <asm/sunbpp.h>
42
43 #undef __SUNBPP_DEBUG
44 #ifdef __SUNBPP_DEBUG
45 #define dprintk(x) printk x
46 #else
47 #define dprintk(x)
48 #endif
49
50 static void parport_sunbpp_disable_irq(struct parport *p)
51 {
52 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
53 u32 tmp;
54
55 tmp = sbus_readl(®s->p_csr);
56 tmp &= ~DMA_INT_ENAB;
57 sbus_writel(tmp, ®s->p_csr);
58 }
59
60 static void parport_sunbpp_enable_irq(struct parport *p)
61 {
62 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
63 u32 tmp;
64
65 tmp = sbus_readl(®s->p_csr);
66 tmp |= DMA_INT_ENAB;
67 sbus_writel(tmp, ®s->p_csr);
68 }
69
70 static void parport_sunbpp_write_data(struct parport *p, unsigned char d)
71 {
72 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
73
74 sbus_writeb(d, ®s->p_dr);
75 dprintk((KERN_DEBUG "wrote 0x%x\n", d));
76 }
77
78 static unsigned char parport_sunbpp_read_data(struct parport *p)
79 {
80 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
81
82 return sbus_readb(®s->p_dr);
83 }
84
85 #if 0
86 static void control_pc_to_sunbpp(struct parport *p, unsigned char status)
87 {
88 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
89 unsigned char value_tcr = sbus_readb(®s->p_tcr);
90 unsigned char value_or = sbus_readb(®s->p_or);
91
92 if (status & PARPORT_CONTROL_STROBE)
93 value_tcr |= P_TCR_DS;
94 if (status & PARPORT_CONTROL_AUTOFD)
95 value_or |= P_OR_AFXN;
96 if (status & PARPORT_CONTROL_INIT)
97 value_or |= P_OR_INIT;
98 if (status & PARPORT_CONTROL_SELECT)
99 value_or |= P_OR_SLCT_IN;
100
101 sbus_writeb(value_or, ®s->p_or);
102 sbus_writeb(value_tcr, ®s->p_tcr);
103 }
104 #endif
105
106 static unsigned char status_sunbpp_to_pc(struct parport *p)
107 {
108 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
109 unsigned char bits = 0;
110 unsigned char value_tcr = sbus_readb(®s->p_tcr);
111 unsigned char value_ir = sbus_readb(®s->p_ir);
112
113 if (!(value_ir & P_IR_ERR))
114 bits |= PARPORT_STATUS_ERROR;
115 if (!(value_ir & P_IR_SLCT))
116 bits |= PARPORT_STATUS_SELECT;
117 if (!(value_ir & P_IR_PE))
118 bits |= PARPORT_STATUS_PAPEROUT;
119 if (value_tcr & P_TCR_ACK)
120 bits |= PARPORT_STATUS_ACK;
121 if (!(value_tcr & P_TCR_BUSY))
122 bits |= PARPORT_STATUS_BUSY;
123
124 dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", value_tcr, value_ir));
125 dprintk((KERN_DEBUG "read status 0x%x\n", bits));
126 return bits;
127 }
128
129 static unsigned char control_sunbpp_to_pc(struct parport *p)
130 {
131 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
132 unsigned char bits = 0;
133 unsigned char value_tcr = sbus_readb(®s->p_tcr);
134 unsigned char value_or = sbus_readb(®s->p_or);
135
136 if (!(value_tcr & P_TCR_DS))
137 bits |= PARPORT_CONTROL_STROBE;
138 if (!(value_or & P_OR_AFXN))
139 bits |= PARPORT_CONTROL_AUTOFD;
140 if (!(value_or & P_OR_INIT))
141 bits |= PARPORT_CONTROL_INIT;
142 if (value_or & P_OR_SLCT_IN)
143 bits |= PARPORT_CONTROL_SELECT;
144
145 dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", value_tcr, value_or));
146 dprintk((KERN_DEBUG "read control 0x%x\n", bits));
147 return bits;
148 }
149
150 static unsigned char parport_sunbpp_read_control(struct parport *p)
151 {
152 return control_sunbpp_to_pc(p);
153 }
154
155 static unsigned char parport_sunbpp_frob_control(struct parport *p,
156 unsigned char mask,
157 unsigned char val)
158 {
159 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
160 unsigned char value_tcr = sbus_readb(®s->p_tcr);
161 unsigned char value_or = sbus_readb(®s->p_or);
162
163 dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n",
164 value_tcr, value_or));
165 if (mask & PARPORT_CONTROL_STROBE) {
166 if (val & PARPORT_CONTROL_STROBE) {
167 value_tcr &= ~P_TCR_DS;
168 } else {
169 value_tcr |= P_TCR_DS;
170 }
171 }
172 if (mask & PARPORT_CONTROL_AUTOFD) {
173 if (val & PARPORT_CONTROL_AUTOFD) {
174 value_or &= ~P_OR_AFXN;
175 } else {
176 value_or |= P_OR_AFXN;
177 }
178 }
179 if (mask & PARPORT_CONTROL_INIT) {
180 if (val & PARPORT_CONTROL_INIT) {
181 value_or &= ~P_OR_INIT;
182 } else {
183 value_or |= P_OR_INIT;
184 }
185 }
186 if (mask & PARPORT_CONTROL_SELECT) {
187 if (val & PARPORT_CONTROL_SELECT) {
188 value_or |= P_OR_SLCT_IN;
189 } else {
190 value_or &= ~P_OR_SLCT_IN;
191 }
192 }
193
194 sbus_writeb(value_or, ®s->p_or);
195 sbus_writeb(value_tcr, ®s->p_tcr);
196 dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n",
197 value_tcr, value_or));
198 return parport_sunbpp_read_control(p);
199 }
200
201 static void parport_sunbpp_write_control(struct parport *p, unsigned char d)
202 {
203 const unsigned char wm = (PARPORT_CONTROL_STROBE |
204 PARPORT_CONTROL_AUTOFD |
205 PARPORT_CONTROL_INIT |
206 PARPORT_CONTROL_SELECT);
207
208 parport_sunbpp_frob_control (p, wm, d & wm);
209 }
210
211 static unsigned char parport_sunbpp_read_status(struct parport *p)
212 {
213 return status_sunbpp_to_pc(p);
214 }
215
216 static void parport_sunbpp_data_forward (struct parport *p)
217 {
218 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
219 unsigned char value_tcr = sbus_readb(®s->p_tcr);
220
221 dprintk((KERN_DEBUG "forward\n"));
222 value_tcr &= ~P_TCR_DIR;
223 sbus_writeb(value_tcr, ®s->p_tcr);
224 }
225
226 static void parport_sunbpp_data_reverse (struct parport *p)
227 {
228 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
229 u8 val = sbus_readb(®s->p_tcr);
230
231 dprintk((KERN_DEBUG "reverse\n"));
232 val |= P_TCR_DIR;
233 sbus_writeb(val, ®s->p_tcr);
234 }
235
236 static void parport_sunbpp_init_state(struct pardevice *dev, struct parport_state *s)
237 {
238 s->u.pc.ctr = 0xc;
239 s->u.pc.ecr = 0x0;
240 }
241
242 static void parport_sunbpp_save_state(struct parport *p, struct parport_state *s)
243 {
244 s->u.pc.ctr = parport_sunbpp_read_control(p);
245 }
246
247 static void parport_sunbpp_restore_state(struct parport *p, struct parport_state *s)
248 {
249 parport_sunbpp_write_control(p, s->u.pc.ctr);
250 }
251
252 static struct parport_operations parport_sunbpp_ops =
253 {
254 .write_data = parport_sunbpp_write_data,
255 .read_data = parport_sunbpp_read_data,
256
257 .write_control = parport_sunbpp_write_control,
258 .read_control = parport_sunbpp_read_control,
259 .frob_control = parport_sunbpp_frob_control,
260
261 .read_status = parport_sunbpp_read_status,
262
263 .enable_irq = parport_sunbpp_enable_irq,
264 .disable_irq = parport_sunbpp_disable_irq,
265
266 .data_forward = parport_sunbpp_data_forward,
267 .data_reverse = parport_sunbpp_data_reverse,
268
269 .init_state = parport_sunbpp_init_state,
270 .save_state = parport_sunbpp_save_state,
271 .restore_state = parport_sunbpp_restore_state,
272
273 .epp_write_data = parport_ieee1284_epp_write_data,
274 .epp_read_data = parport_ieee1284_epp_read_data,
275 .epp_write_addr = parport_ieee1284_epp_write_addr,
276 .epp_read_addr = parport_ieee1284_epp_read_addr,
277
278 .ecp_write_data = parport_ieee1284_ecp_write_data,
279 .ecp_read_data = parport_ieee1284_ecp_read_data,
280 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
281
282 .compat_write_data = parport_ieee1284_write_compat,
283 .nibble_read_data = parport_ieee1284_read_nibble,
284 .byte_read_data = parport_ieee1284_read_byte,
285
286 .owner = THIS_MODULE,
287 };
288
289 static int __devinit bpp_probe(struct of_device *op, const struct of_device_id *match)
290 {
291 struct parport_operations *ops;
292 struct bpp_regs __iomem *regs;
293 int irq, dma, err = 0, size;
294 unsigned char value_tcr;
295 void __iomem *base;
296 struct parport *p;
297
298 irq = op->irqs[0];
299 base = of_ioremap(&op->resource[0], 0,
300 resource_size(&op->resource[0]),
301 "sunbpp");
302 if (!base)
303 return -ENODEV;
304
305 size = resource_size(&op->resource[0]);
306 dma = PARPORT_DMA_NONE;
307
308 ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
309 if (!ops)
310 goto out_unmap;
311
312 memcpy (ops, &parport_sunbpp_ops, sizeof(struct parport_operations));
313
314 dprintk(("register_port\n"));
315 if (!(p = parport_register_port((unsigned long)base, irq, dma, ops)))
316 goto out_free_ops;
317
318 p->size = size;
319 p->dev = &op->dev;
320
321 if ((err = request_irq(p->irq, parport_irq_handler,
322 IRQF_SHARED, p->name, p)) != 0) {
323 goto out_put_port;
324 }
325
326 parport_sunbpp_enable_irq(p);
327
328 regs = (struct bpp_regs __iomem *)p->base;
329
330 value_tcr = sbus_readb(®s->p_tcr);
331 value_tcr &= ~P_TCR_DIR;
332 sbus_writeb(value_tcr, ®s->p_tcr);
333
334 printk(KERN_INFO "%s: sunbpp at 0x%lx\n", p->name, p->base);
335
336 dev_set_drvdata(&op->dev, p);
337
338 parport_announce_port(p);
339
340 return 0;
341
342 out_put_port:
343 parport_put_port(p);
344
345 out_free_ops:
346 kfree(ops);
347
348 out_unmap:
349 of_iounmap(&op->resource[0], base, size);
350
351 return err;
352 }
353
354 static int __devexit bpp_remove(struct of_device *op)
355 {
356 struct parport *p = dev_get_drvdata(&op->dev);
357 struct parport_operations *ops = p->ops;
358
359 parport_remove_port(p);
360
361 if (p->irq != PARPORT_IRQ_NONE) {
362 parport_sunbpp_disable_irq(p);
363 free_irq(p->irq, p);
364 }
365
366 of_iounmap(&op->resource[0], (void __iomem *) p->base, p->size);
367 parport_put_port(p);
368 kfree(ops);
369
370 dev_set_drvdata(&op->dev, NULL);
371
372 return 0;
373 }
374
375 static const struct of_device_id bpp_match[] = {
376 {
377 .name = "SUNW,bpp",
378 },
379 {},
380 };
381
382 MODULE_DEVICE_TABLE(of, bpp_match);
383
384 static struct of_platform_driver bpp_sbus_driver = {
385 .name = "bpp",
386 .match_table = bpp_match,
387 .probe = bpp_probe,
388 .remove = __devexit_p(bpp_remove),
389 };
390
391 static int __init parport_sunbpp_init(void)
392 {
393 return of_register_driver(&bpp_sbus_driver, &of_bus_type);
394 }
395
396 static void __exit parport_sunbpp_exit(void)
397 {
398 of_unregister_driver(&bpp_sbus_driver);
399 }
400
401 MODULE_AUTHOR("Derrick J Brashear");
402 MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port");
403 MODULE_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port");
404 MODULE_VERSION("2.0");
405 MODULE_LICENSE("GPL");
406
407 module_init(parport_sunbpp_init)
408 module_exit(parport_sunbpp_exit)
409
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