[PARPORT] Consolidate code copies into a single generic irq handler
[linux-2.6.git] / drivers / parport / parport_sunbpp.c
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
30 #include <linux/parport.h>
31
32 #include <asm/ptrace.h>
33 #include <linux/interrupt.h>
34
35 #include <asm/io.h>
36 #include <asm/oplib.h>           /* OpenProm Library */
37 #include <asm/sbus.h>
38 #include <asm/dma.h>             /* BPP uses LSI 64854 for DMA */
39 #include <asm/irq.h>
40 #include <asm/sunbpp.h>
41
42 #undef __SUNBPP_DEBUG
43 #ifdef __SUNBPP_DEBUG
44 #define dprintk(x) printk x
45 #else
46 #define dprintk(x)
47 #endif
48
49 static void parport_sunbpp_disable_irq(struct parport *p)
50 {
51         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
52         u32 tmp;
53
54         tmp = sbus_readl(&regs->p_csr);
55         tmp &= ~DMA_INT_ENAB;
56         sbus_writel(tmp, &regs->p_csr);
57 }
58
59 static void parport_sunbpp_enable_irq(struct parport *p)
60 {
61         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
62         u32 tmp;
63
64         tmp = sbus_readl(&regs->p_csr);
65         tmp |= DMA_INT_ENAB;
66         sbus_writel(tmp, &regs->p_csr);
67 }
68
69 static void parport_sunbpp_write_data(struct parport *p, unsigned char d)
70 {
71         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
72
73         sbus_writeb(d, &regs->p_dr);
74         dprintk((KERN_DEBUG "wrote 0x%x\n", d));
75 }
76
77 static unsigned char parport_sunbpp_read_data(struct parport *p)
78 {
79         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
80
81         return sbus_readb(&regs->p_dr);
82 }
83
84 #if 0
85 static void control_pc_to_sunbpp(struct parport *p, unsigned char status)
86 {
87         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
88         unsigned char value_tcr = sbus_readb(&regs->p_tcr);
89         unsigned char value_or = sbus_readb(&regs->p_or);
90
91         if (status & PARPORT_CONTROL_STROBE) 
92                 value_tcr |= P_TCR_DS;
93         if (status & PARPORT_CONTROL_AUTOFD) 
94                 value_or |= P_OR_AFXN;
95         if (status & PARPORT_CONTROL_INIT) 
96                 value_or |= P_OR_INIT;
97         if (status & PARPORT_CONTROL_SELECT) 
98                 value_or |= P_OR_SLCT_IN;
99
100         sbus_writeb(value_or, &regs->p_or);
101         sbus_writeb(value_tcr, &regs->p_tcr);
102 }
103 #endif
104
105 static unsigned char status_sunbpp_to_pc(struct parport *p)
106 {
107         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
108         unsigned char bits = 0;
109         unsigned char value_tcr = sbus_readb(&regs->p_tcr);
110         unsigned char value_ir = sbus_readb(&regs->p_ir);
111
112         if (!(value_ir & P_IR_ERR))
113                 bits |= PARPORT_STATUS_ERROR;
114         if (!(value_ir & P_IR_SLCT))
115                 bits |= PARPORT_STATUS_SELECT;
116         if (!(value_ir & P_IR_PE))
117                 bits |= PARPORT_STATUS_PAPEROUT;
118         if (value_tcr & P_TCR_ACK)
119                 bits |= PARPORT_STATUS_ACK;
120         if (!(value_tcr & P_TCR_BUSY))
121                 bits |= PARPORT_STATUS_BUSY;
122
123         dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", value_tcr, value_ir));
124         dprintk((KERN_DEBUG "read status 0x%x\n", bits));
125         return bits;
126 }
127
128 static unsigned char control_sunbpp_to_pc(struct parport *p)
129 {
130         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
131         unsigned char bits = 0;
132         unsigned char value_tcr = sbus_readb(&regs->p_tcr);
133         unsigned char value_or = sbus_readb(&regs->p_or);
134
135         if (!(value_tcr & P_TCR_DS))
136                 bits |= PARPORT_CONTROL_STROBE;
137         if (!(value_or & P_OR_AFXN))
138                 bits |= PARPORT_CONTROL_AUTOFD;
139         if (!(value_or & P_OR_INIT))
140                 bits |= PARPORT_CONTROL_INIT;
141         if (value_or & P_OR_SLCT_IN)
142                 bits |= PARPORT_CONTROL_SELECT;
143
144         dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", value_tcr, value_or));
145         dprintk((KERN_DEBUG "read control 0x%x\n", bits));
146         return bits;
147 }
148
149 static unsigned char parport_sunbpp_read_control(struct parport *p)
150 {
151         return control_sunbpp_to_pc(p);
152 }
153
154 static unsigned char parport_sunbpp_frob_control(struct parport *p,
155                                                  unsigned char mask,
156                                                  unsigned char val)
157 {
158         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
159         unsigned char value_tcr = sbus_readb(&regs->p_tcr);
160         unsigned char value_or = sbus_readb(&regs->p_or);
161
162         dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n",
163                  value_tcr, value_or));
164         if (mask & PARPORT_CONTROL_STROBE) {
165                 if (val & PARPORT_CONTROL_STROBE) {
166                         value_tcr &= ~P_TCR_DS;
167                 } else {
168                         value_tcr |= P_TCR_DS;
169                 }
170         }
171         if (mask & PARPORT_CONTROL_AUTOFD) {
172                 if (val & PARPORT_CONTROL_AUTOFD) {
173                         value_or &= ~P_OR_AFXN;
174                 } else {
175                         value_or |= P_OR_AFXN;
176                 }
177         }
178         if (mask & PARPORT_CONTROL_INIT) {
179                 if (val & PARPORT_CONTROL_INIT) {
180                         value_or &= ~P_OR_INIT;
181                 } else {
182                         value_or |= P_OR_INIT;
183                 }
184         }
185         if (mask & PARPORT_CONTROL_SELECT) {
186                 if (val & PARPORT_CONTROL_SELECT) {
187                         value_or |= P_OR_SLCT_IN;
188                 } else {
189                         value_or &= ~P_OR_SLCT_IN;
190                 }
191         }
192
193         sbus_writeb(value_or, &regs->p_or);
194         sbus_writeb(value_tcr, &regs->p_tcr);
195         dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n",
196                  value_tcr, value_or));
197         return parport_sunbpp_read_control(p);
198 }
199
200 static void parport_sunbpp_write_control(struct parport *p, unsigned char d)
201 {
202         const unsigned char wm = (PARPORT_CONTROL_STROBE |
203                                   PARPORT_CONTROL_AUTOFD |
204                                   PARPORT_CONTROL_INIT |
205                                   PARPORT_CONTROL_SELECT);
206
207         parport_sunbpp_frob_control (p, wm, d & wm);
208 }
209
210 static unsigned char parport_sunbpp_read_status(struct parport *p)
211 {
212         return status_sunbpp_to_pc(p);
213 }
214
215 static void parport_sunbpp_data_forward (struct parport *p)
216 {
217         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
218         unsigned char value_tcr = sbus_readb(&regs->p_tcr);
219
220         dprintk((KERN_DEBUG "forward\n"));
221         value_tcr &= ~P_TCR_DIR;
222         sbus_writeb(value_tcr, &regs->p_tcr);
223 }
224
225 static void parport_sunbpp_data_reverse (struct parport *p)
226 {
227         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
228         u8 val = sbus_readb(&regs->p_tcr);
229
230         dprintk((KERN_DEBUG "reverse\n"));
231         val |= P_TCR_DIR;
232         sbus_writeb(val, &regs->p_tcr);
233 }
234
235 static void parport_sunbpp_init_state(struct pardevice *dev, struct parport_state *s)
236 {
237         s->u.pc.ctr = 0xc;
238         s->u.pc.ecr = 0x0;
239 }
240
241 static void parport_sunbpp_save_state(struct parport *p, struct parport_state *s)
242 {
243         s->u.pc.ctr = parport_sunbpp_read_control(p);
244 }
245
246 static void parport_sunbpp_restore_state(struct parport *p, struct parport_state *s)
247 {
248         parport_sunbpp_write_control(p, s->u.pc.ctr);
249 }
250
251 static struct parport_operations parport_sunbpp_ops = 
252 {
253         .write_data     = parport_sunbpp_write_data,
254         .read_data      = parport_sunbpp_read_data,
255
256         .write_control  = parport_sunbpp_write_control,
257         .read_control   = parport_sunbpp_read_control,
258         .frob_control   = parport_sunbpp_frob_control,
259
260         .read_status    = parport_sunbpp_read_status,
261
262         .enable_irq     = parport_sunbpp_enable_irq,
263         .disable_irq    = parport_sunbpp_disable_irq,
264
265         .data_forward   = parport_sunbpp_data_forward,
266         .data_reverse   = parport_sunbpp_data_reverse,
267
268         .init_state     = parport_sunbpp_init_state,
269         .save_state     = parport_sunbpp_save_state,
270         .restore_state  = parport_sunbpp_restore_state,
271
272         .epp_write_data = parport_ieee1284_epp_write_data,
273         .epp_read_data  = parport_ieee1284_epp_read_data,
274         .epp_write_addr = parport_ieee1284_epp_write_addr,
275         .epp_read_addr  = parport_ieee1284_epp_read_addr,
276
277         .ecp_write_data = parport_ieee1284_ecp_write_data,
278         .ecp_read_data  = parport_ieee1284_ecp_read_data,
279         .ecp_write_addr = parport_ieee1284_ecp_write_addr,
280
281         .compat_write_data      = parport_ieee1284_write_compat,
282         .nibble_read_data       = parport_ieee1284_read_nibble,
283         .byte_read_data         = parport_ieee1284_read_byte,
284
285         .owner          = THIS_MODULE,
286 };
287
288 static int __devinit init_one_port(struct sbus_dev *sdev)
289 {
290         struct parport *p;
291         /* at least in theory there may be a "we don't dma" case */
292         struct parport_operations *ops;
293         void __iomem *base;
294         int irq, dma, err = 0, size;
295         struct bpp_regs __iomem *regs;
296         unsigned char value_tcr;
297
298         irq = sdev->irqs[0];
299         base = sbus_ioremap(&sdev->resource[0], 0,
300                             sdev->reg_addrs[0].reg_size, 
301                             "sunbpp");
302         if (!base)
303                 return -ENODEV;
304
305         size = sdev->reg_addrs[0].reg_size;
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 = &sdev->ofdev.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(&regs->p_tcr);
331         value_tcr &= ~P_TCR_DIR;
332         sbus_writeb(value_tcr, &regs->p_tcr);
333
334         printk(KERN_INFO "%s: sunbpp at 0x%lx\n", p->name, p->base);
335
336         dev_set_drvdata(&sdev->ofdev.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         sbus_iounmap(base, size);
350
351         return err;
352 }
353
354 static int __devinit bpp_probe(struct of_device *dev, const struct of_device_id *match)
355 {
356         struct sbus_dev *sdev = to_sbus_device(&dev->dev);
357
358         return init_one_port(sdev);
359 }
360
361 static int __devexit bpp_remove(struct of_device *dev)
362 {
363         struct parport *p = dev_get_drvdata(&dev->dev);
364         struct parport_operations *ops = p->ops;
365
366         parport_remove_port(p);
367
368         if (p->irq != PARPORT_IRQ_NONE) {
369                 parport_sunbpp_disable_irq(p);
370                 free_irq(p->irq, p);
371         }
372
373         sbus_iounmap((void __iomem *) p->base, p->size);
374         parport_put_port(p);
375         kfree(ops);
376
377         dev_set_drvdata(&dev->dev, NULL);
378
379         return 0;
380 }
381
382 static struct of_device_id bpp_match[] = {
383         {
384                 .name = "SUNW,bpp",
385         },
386         {},
387 };
388
389 MODULE_DEVICE_TABLE(of, bpp_match);
390
391 static struct of_platform_driver bpp_sbus_driver = {
392         .name           = "bpp",
393         .match_table    = bpp_match,
394         .probe          = bpp_probe,
395         .remove         = __devexit_p(bpp_remove),
396 };
397
398 static int __init parport_sunbpp_init(void)
399 {
400         return of_register_driver(&bpp_sbus_driver, &sbus_bus_type);
401 }
402
403 static void __exit parport_sunbpp_exit(void)
404 {
405         of_unregister_driver(&bpp_sbus_driver);
406 }
407
408 MODULE_AUTHOR("Derrick J Brashear");
409 MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port");
410 MODULE_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port");
411 MODULE_VERSION("2.0");
412 MODULE_LICENSE("GPL");
413
414 module_init(parport_sunbpp_init)
415 module_exit(parport_sunbpp_exit)