Commit | Line | Data |
---|---|---|
4f62d158 | 1 | /* parport_sunbpp.c: Parallel-port routines for SBUS |
1da177e4 LT |
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 | |
4f62d158 DM |
16 | * |
17 | * Updated to new SBUS device framework: David S. Miller <davem@davemloft.net> | |
18 | * | |
1da177e4 LT |
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 | ||
1da177e4 LT |
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(®s->p_csr); | |
55 | tmp &= ~DMA_INT_ENAB; | |
56 | sbus_writel(tmp, ®s->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(®s->p_csr); | |
65 | tmp |= DMA_INT_ENAB; | |
66 | sbus_writel(tmp, ®s->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, ®s->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(®s->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(®s->p_tcr); | |
89 | unsigned char value_or = sbus_readb(®s->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, ®s->p_or); | |
101 | sbus_writeb(value_tcr, ®s->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(®s->p_tcr); | |
110 | unsigned char value_ir = sbus_readb(®s->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 | ||
5a68b2e3 | 123 | dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", value_tcr, value_ir)); |
1da177e4 LT |
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(®s->p_tcr); | |
133 | unsigned char value_or = sbus_readb(®s->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 | ||
5a68b2e3 | 144 | dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", value_tcr, value_or)); |
1da177e4 LT |
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(®s->p_tcr); | |
160 | unsigned char value_or = sbus_readb(®s->p_or); | |
161 | ||
5a68b2e3 DM |
162 | dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n", |
163 | value_tcr, value_or)); | |
1da177e4 LT |
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, ®s->p_or); | |
194 | sbus_writeb(value_tcr, ®s->p_tcr); | |
5a68b2e3 DM |
195 | dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n", |
196 | value_tcr, value_or)); | |
1da177e4 LT |
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(®s->p_tcr); | |
219 | ||
220 | dprintk((KERN_DEBUG "forward\n")); | |
221 | value_tcr &= ~P_TCR_DIR; | |
222 | sbus_writeb(value_tcr, ®s->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(®s->p_tcr); | |
229 | ||
230 | dprintk((KERN_DEBUG "reverse\n")); | |
231 | val |= P_TCR_DIR; | |
232 | sbus_writeb(val, ®s->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 | ||
4f62d158 | 288 | static int __devinit init_one_port(struct sbus_dev *sdev) |
1da177e4 LT |
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; | |
1da177e4 LT |
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) | |
4f62d158 | 303 | return -ENODEV; |
1da177e4 LT |
304 | |
305 | size = sdev->reg_addrs[0].reg_size; | |
306 | dma = PARPORT_DMA_NONE; | |
307 | ||
4f62d158 | 308 | ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL); |
1da177e4 | 309 | if (!ops) |
4f62d158 | 310 | goto out_unmap; |
1da177e4 LT |
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))) | |
4f62d158 | 316 | goto out_free_ops; |
1da177e4 LT |
317 | |
318 | p->size = size; | |
c15a3837 | 319 | p->dev = &sdev->ofdev.dev; |
1da177e4 | 320 | |
3f2e40df | 321 | if ((err = request_irq(p->irq, parport_irq_handler, |
dace1453 | 322 | IRQF_SHARED, p->name, p)) != 0) { |
4f62d158 | 323 | goto out_put_port; |
1da177e4 | 324 | } |
4f62d158 | 325 | |
1da177e4 LT |
326 | parport_sunbpp_enable_irq(p); |
327 | ||
328 | regs = (struct bpp_regs __iomem *)p->base; | |
4f62d158 | 329 | |
1da177e4 LT |
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); | |
1da177e4 | 335 | |
4f62d158 DM |
336 | dev_set_drvdata(&sdev->ofdev.dev, p); |
337 | ||
338 | parport_announce_port(p); | |
339 | ||
340 | return 0; | |
1da177e4 | 341 | |
4f62d158 | 342 | out_put_port: |
1da177e4 | 343 | parport_put_port(p); |
4f62d158 DM |
344 | |
345 | out_free_ops: | |
1da177e4 | 346 | kfree(ops); |
4f62d158 DM |
347 | |
348 | out_unmap: | |
1da177e4 | 349 | sbus_iounmap(base, size); |
4f62d158 | 350 | |
1da177e4 LT |
351 | return err; |
352 | } | |
353 | ||
4f62d158 | 354 | static int __devinit bpp_probe(struct of_device *dev, const struct of_device_id *match) |
1da177e4 | 355 | { |
4f62d158 DM |
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); | |
1da177e4 | 371 | } |
4f62d158 DM |
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 | ||
09ec4314 | 389 | MODULE_DEVICE_TABLE(of, bpp_match); |
4f62d158 DM |
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); | |
1da177e4 LT |
401 | } |
402 | ||
403 | static void __exit parport_sunbpp_exit(void) | |
404 | { | |
4f62d158 | 405 | of_unregister_driver(&bpp_sbus_driver); |
1da177e4 LT |
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"); | |
4f62d158 | 411 | MODULE_VERSION("2.0"); |
1da177e4 LT |
412 | MODULE_LICENSE("GPL"); |
413 | ||
414 | module_init(parport_sunbpp_init) | |
415 | module_exit(parport_sunbpp_exit) |