[PARPORT] sunbpp: Convert to new SBUS device framework.
[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 irqreturn_t parport_sunbpp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
50 {
51         parport_generic_irq(irq, (struct parport *) dev_id, regs);
52         return IRQ_HANDLED;
53 }
54
55 static void parport_sunbpp_disable_irq(struct parport *p)
56 {
57         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
58         u32 tmp;
59
60         tmp = sbus_readl(&regs->p_csr);
61         tmp &= ~DMA_INT_ENAB;
62         sbus_writel(tmp, &regs->p_csr);
63 }
64
65 static void parport_sunbpp_enable_irq(struct parport *p)
66 {
67         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
68         u32 tmp;
69
70         tmp = sbus_readl(&regs->p_csr);
71         tmp |= DMA_INT_ENAB;
72         sbus_writel(tmp, &regs->p_csr);
73 }
74
75 static void parport_sunbpp_write_data(struct parport *p, unsigned char d)
76 {
77         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
78
79         sbus_writeb(d, &regs->p_dr);
80         dprintk((KERN_DEBUG "wrote 0x%x\n", d));
81 }
82
83 static unsigned char parport_sunbpp_read_data(struct parport *p)
84 {
85         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
86
87         return sbus_readb(&regs->p_dr);
88 }
89
90 #if 0
91 static void control_pc_to_sunbpp(struct parport *p, unsigned char status)
92 {
93         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
94         unsigned char value_tcr = sbus_readb(&regs->p_tcr);
95         unsigned char value_or = sbus_readb(&regs->p_or);
96
97         if (status & PARPORT_CONTROL_STROBE) 
98                 value_tcr |= P_TCR_DS;
99         if (status & PARPORT_CONTROL_AUTOFD) 
100                 value_or |= P_OR_AFXN;
101         if (status & PARPORT_CONTROL_INIT) 
102                 value_or |= P_OR_INIT;
103         if (status & PARPORT_CONTROL_SELECT) 
104                 value_or |= P_OR_SLCT_IN;
105
106         sbus_writeb(value_or, &regs->p_or);
107         sbus_writeb(value_tcr, &regs->p_tcr);
108 }
109 #endif
110
111 static unsigned char status_sunbpp_to_pc(struct parport *p)
112 {
113         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
114         unsigned char bits = 0;
115         unsigned char value_tcr = sbus_readb(&regs->p_tcr);
116         unsigned char value_ir = sbus_readb(&regs->p_ir);
117
118         if (!(value_ir & P_IR_ERR))
119                 bits |= PARPORT_STATUS_ERROR;
120         if (!(value_ir & P_IR_SLCT))
121                 bits |= PARPORT_STATUS_SELECT;
122         if (!(value_ir & P_IR_PE))
123                 bits |= PARPORT_STATUS_PAPEROUT;
124         if (value_tcr & P_TCR_ACK)
125                 bits |= PARPORT_STATUS_ACK;
126         if (!(value_tcr & P_TCR_BUSY))
127                 bits |= PARPORT_STATUS_BUSY;
128
129         dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", regs->p_tcr, regs->p_ir));
130         dprintk((KERN_DEBUG "read status 0x%x\n", bits));
131         return bits;
132 }
133
134 static unsigned char control_sunbpp_to_pc(struct parport *p)
135 {
136         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
137         unsigned char bits = 0;
138         unsigned char value_tcr = sbus_readb(&regs->p_tcr);
139         unsigned char value_or = sbus_readb(&regs->p_or);
140
141         if (!(value_tcr & P_TCR_DS))
142                 bits |= PARPORT_CONTROL_STROBE;
143         if (!(value_or & P_OR_AFXN))
144                 bits |= PARPORT_CONTROL_AUTOFD;
145         if (!(value_or & P_OR_INIT))
146                 bits |= PARPORT_CONTROL_INIT;
147         if (value_or & P_OR_SLCT_IN)
148                 bits |= PARPORT_CONTROL_SELECT;
149
150         dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", regs->p_tcr, regs->p_or));
151         dprintk((KERN_DEBUG "read control 0x%x\n", bits));
152         return bits;
153 }
154
155 static unsigned char parport_sunbpp_read_control(struct parport *p)
156 {
157         return control_sunbpp_to_pc(p);
158 }
159
160 static unsigned char parport_sunbpp_frob_control(struct parport *p,
161                                                  unsigned char mask,
162                                                  unsigned char val)
163 {
164         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
165         unsigned char value_tcr = sbus_readb(&regs->p_tcr);
166         unsigned char value_or = sbus_readb(&regs->p_or);
167
168         dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n", regs->p_tcr, regs->p_or));
169         if (mask & PARPORT_CONTROL_STROBE) {
170                 if (val & PARPORT_CONTROL_STROBE) {
171                         value_tcr &= ~P_TCR_DS;
172                 } else {
173                         value_tcr |= P_TCR_DS;
174                 }
175         }
176         if (mask & PARPORT_CONTROL_AUTOFD) {
177                 if (val & PARPORT_CONTROL_AUTOFD) {
178                         value_or &= ~P_OR_AFXN;
179                 } else {
180                         value_or |= P_OR_AFXN;
181                 }
182         }
183         if (mask & PARPORT_CONTROL_INIT) {
184                 if (val & PARPORT_CONTROL_INIT) {
185                         value_or &= ~P_OR_INIT;
186                 } else {
187                         value_or |= P_OR_INIT;
188                 }
189         }
190         if (mask & PARPORT_CONTROL_SELECT) {
191                 if (val & PARPORT_CONTROL_SELECT) {
192                         value_or |= P_OR_SLCT_IN;
193                 } else {
194                         value_or &= ~P_OR_SLCT_IN;
195                 }
196         }
197
198         sbus_writeb(value_or, &regs->p_or);
199         sbus_writeb(value_tcr, &regs->p_tcr);
200         dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n", regs->p_tcr, regs->p_or));
201         return parport_sunbpp_read_control(p);
202 }
203
204 static void parport_sunbpp_write_control(struct parport *p, unsigned char d)
205 {
206         const unsigned char wm = (PARPORT_CONTROL_STROBE |
207                                   PARPORT_CONTROL_AUTOFD |
208                                   PARPORT_CONTROL_INIT |
209                                   PARPORT_CONTROL_SELECT);
210
211         parport_sunbpp_frob_control (p, wm, d & wm);
212 }
213
214 static unsigned char parport_sunbpp_read_status(struct parport *p)
215 {
216         return status_sunbpp_to_pc(p);
217 }
218
219 static void parport_sunbpp_data_forward (struct parport *p)
220 {
221         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
222         unsigned char value_tcr = sbus_readb(&regs->p_tcr);
223
224         dprintk((KERN_DEBUG "forward\n"));
225         value_tcr &= ~P_TCR_DIR;
226         sbus_writeb(value_tcr, &regs->p_tcr);
227 }
228
229 static void parport_sunbpp_data_reverse (struct parport *p)
230 {
231         struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
232         u8 val = sbus_readb(&regs->p_tcr);
233
234         dprintk((KERN_DEBUG "reverse\n"));
235         val |= P_TCR_DIR;
236         sbus_writeb(val, &regs->p_tcr);
237 }
238
239 static void parport_sunbpp_init_state(struct pardevice *dev, struct parport_state *s)
240 {
241         s->u.pc.ctr = 0xc;
242         s->u.pc.ecr = 0x0;
243 }
244
245 static void parport_sunbpp_save_state(struct parport *p, struct parport_state *s)
246 {
247         s->u.pc.ctr = parport_sunbpp_read_control(p);
248 }
249
250 static void parport_sunbpp_restore_state(struct parport *p, struct parport_state *s)
251 {
252         parport_sunbpp_write_control(p, s->u.pc.ctr);
253 }
254
255 static struct parport_operations parport_sunbpp_ops = 
256 {
257         .write_data     = parport_sunbpp_write_data,
258         .read_data      = parport_sunbpp_read_data,
259
260         .write_control  = parport_sunbpp_write_control,
261         .read_control   = parport_sunbpp_read_control,
262         .frob_control   = parport_sunbpp_frob_control,
263
264         .read_status    = parport_sunbpp_read_status,
265
266         .enable_irq     = parport_sunbpp_enable_irq,
267         .disable_irq    = parport_sunbpp_disable_irq,
268
269         .data_forward   = parport_sunbpp_data_forward,
270         .data_reverse   = parport_sunbpp_data_reverse,
271
272         .init_state     = parport_sunbpp_init_state,
273         .save_state     = parport_sunbpp_save_state,
274         .restore_state  = parport_sunbpp_restore_state,
275
276         .epp_write_data = parport_ieee1284_epp_write_data,
277         .epp_read_data  = parport_ieee1284_epp_read_data,
278         .epp_write_addr = parport_ieee1284_epp_write_addr,
279         .epp_read_addr  = parport_ieee1284_epp_read_addr,
280
281         .ecp_write_data = parport_ieee1284_ecp_write_data,
282         .ecp_read_data  = parport_ieee1284_ecp_read_data,
283         .ecp_write_addr = parport_ieee1284_ecp_write_addr,
284
285         .compat_write_data      = parport_ieee1284_write_compat,
286         .nibble_read_data       = parport_ieee1284_read_nibble,
287         .byte_read_data         = parport_ieee1284_read_byte,
288
289         .owner          = THIS_MODULE,
290 };
291
292 static int __devinit init_one_port(struct sbus_dev *sdev)
293 {
294         struct parport *p;
295         /* at least in theory there may be a "we don't dma" case */
296         struct parport_operations *ops;
297         void __iomem *base;
298         int irq, dma, err = 0, size;
299         struct bpp_regs __iomem *regs;
300         unsigned char value_tcr;
301
302         irq = sdev->irqs[0];
303         base = sbus_ioremap(&sdev->resource[0], 0,
304                             sdev->reg_addrs[0].reg_size, 
305                             "sunbpp");
306         if (!base)
307                 return -ENODEV;
308
309         size = sdev->reg_addrs[0].reg_size;
310         dma = PARPORT_DMA_NONE;
311
312         ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
313         if (!ops)
314                 goto out_unmap;
315
316         memcpy (ops, &parport_sunbpp_ops, sizeof (struct parport_operations));
317
318         dprintk(("register_port\n"));
319         if (!(p = parport_register_port((unsigned long)base, irq, dma, ops)))
320                 goto out_free_ops;
321
322         p->size = size;
323
324         if ((err = request_irq(p->irq, parport_sunbpp_interrupt,
325                                SA_SHIRQ, p->name, p)) != 0) {
326                 goto out_put_port;
327         }
328
329         parport_sunbpp_enable_irq(p);
330
331         regs = (struct bpp_regs __iomem *)p->base;
332
333         value_tcr = sbus_readb(&regs->p_tcr);
334         value_tcr &= ~P_TCR_DIR;
335         sbus_writeb(value_tcr, &regs->p_tcr);
336
337         printk(KERN_INFO "%s: sunbpp at 0x%lx\n", p->name, p->base);
338
339         dev_set_drvdata(&sdev->ofdev.dev, p);
340
341         parport_announce_port(p);
342
343         return 0;
344
345 out_put_port:
346         parport_put_port(p);
347
348 out_free_ops:
349         kfree(ops);
350
351 out_unmap:
352         sbus_iounmap(base, size);
353
354         return err;
355 }
356
357 static int __devinit bpp_probe(struct of_device *dev, const struct of_device_id *match)
358 {
359         struct sbus_dev *sdev = to_sbus_device(&dev->dev);
360
361         return init_one_port(sdev);
362 }
363
364 static int __devexit bpp_remove(struct of_device *dev)
365 {
366         struct parport *p = dev_get_drvdata(&dev->dev);
367         struct parport_operations *ops = p->ops;
368
369         parport_remove_port(p);
370
371         if (p->irq != PARPORT_IRQ_NONE) {
372                 parport_sunbpp_disable_irq(p);
373                 free_irq(p->irq, p);
374         }
375
376         sbus_iounmap((void __iomem *) p->base, p->size);
377         parport_put_port(p);
378         kfree(ops);
379
380         dev_set_drvdata(&dev->dev, NULL);
381
382         return 0;
383 }
384
385 static struct of_device_id bpp_match[] = {
386         {
387                 .name = "SUNW,bpp",
388         },
389         {},
390 };
391
392 MODULE_DEVICE_TABLE(of, qec_sbus_match);
393
394 static struct of_platform_driver bpp_sbus_driver = {
395         .name           = "bpp",
396         .match_table    = bpp_match,
397         .probe          = bpp_probe,
398         .remove         = __devexit_p(bpp_remove),
399 };
400
401 static int __init parport_sunbpp_init(void)
402 {
403         return of_register_driver(&bpp_sbus_driver, &sbus_bus_type);
404 }
405
406 static void __exit parport_sunbpp_exit(void)
407 {
408         of_unregister_driver(&bpp_sbus_driver);
409 }
410
411 MODULE_AUTHOR("Derrick J Brashear");
412 MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port");
413 MODULE_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port");
414 MODULE_VERSION("2.0");
415 MODULE_LICENSE("GPL");
416
417 module_init(parport_sunbpp_init)
418 module_exit(parport_sunbpp_exit)