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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>
39#include <asm/dma.h>
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
50static 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
60static 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
70static 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
78static 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
85static unsigned char status_sunbpp_to_pc(struct parport *p)
86{
87 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
88 unsigned char bits = 0;
89 unsigned char value_tcr = sbus_readb(®s->p_tcr);
90 unsigned char value_ir = sbus_readb(®s->p_ir);
91
92 if (!(value_ir & P_IR_ERR))
93 bits |= PARPORT_STATUS_ERROR;
94 if (!(value_ir & P_IR_SLCT))
95 bits |= PARPORT_STATUS_SELECT;
96 if (!(value_ir & P_IR_PE))
97 bits |= PARPORT_STATUS_PAPEROUT;
98 if (value_tcr & P_TCR_ACK)
99 bits |= PARPORT_STATUS_ACK;
100 if (!(value_tcr & P_TCR_BUSY))
101 bits |= PARPORT_STATUS_BUSY;
102
103 dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", value_tcr, value_ir));
104 dprintk((KERN_DEBUG "read status 0x%x\n", bits));
105 return bits;
106}
107
108static unsigned char control_sunbpp_to_pc(struct parport *p)
109{
110 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
111 unsigned char bits = 0;
112 unsigned char value_tcr = sbus_readb(®s->p_tcr);
113 unsigned char value_or = sbus_readb(®s->p_or);
114
115 if (!(value_tcr & P_TCR_DS))
116 bits |= PARPORT_CONTROL_STROBE;
117 if (!(value_or & P_OR_AFXN))
118 bits |= PARPORT_CONTROL_AUTOFD;
119 if (!(value_or & P_OR_INIT))
120 bits |= PARPORT_CONTROL_INIT;
121 if (value_or & P_OR_SLCT_IN)
122 bits |= PARPORT_CONTROL_SELECT;
123
124 dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", value_tcr, value_or));
125 dprintk((KERN_DEBUG "read control 0x%x\n", bits));
126 return bits;
127}
128
129static unsigned char parport_sunbpp_read_control(struct parport *p)
130{
131 return control_sunbpp_to_pc(p);
132}
133
134static unsigned char parport_sunbpp_frob_control(struct parport *p,
135 unsigned char mask,
136 unsigned char val)
137{
138 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
139 unsigned char value_tcr = sbus_readb(®s->p_tcr);
140 unsigned char value_or = sbus_readb(®s->p_or);
141
142 dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n",
143 value_tcr, value_or));
144 if (mask & PARPORT_CONTROL_STROBE) {
145 if (val & PARPORT_CONTROL_STROBE) {
146 value_tcr &= ~P_TCR_DS;
147 } else {
148 value_tcr |= P_TCR_DS;
149 }
150 }
151 if (mask & PARPORT_CONTROL_AUTOFD) {
152 if (val & PARPORT_CONTROL_AUTOFD) {
153 value_or &= ~P_OR_AFXN;
154 } else {
155 value_or |= P_OR_AFXN;
156 }
157 }
158 if (mask & PARPORT_CONTROL_INIT) {
159 if (val & PARPORT_CONTROL_INIT) {
160 value_or &= ~P_OR_INIT;
161 } else {
162 value_or |= P_OR_INIT;
163 }
164 }
165 if (mask & PARPORT_CONTROL_SELECT) {
166 if (val & PARPORT_CONTROL_SELECT) {
167 value_or |= P_OR_SLCT_IN;
168 } else {
169 value_or &= ~P_OR_SLCT_IN;
170 }
171 }
172
173 sbus_writeb(value_or, ®s->p_or);
174 sbus_writeb(value_tcr, ®s->p_tcr);
175 dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n",
176 value_tcr, value_or));
177 return parport_sunbpp_read_control(p);
178}
179
180static void parport_sunbpp_write_control(struct parport *p, unsigned char d)
181{
182 const unsigned char wm = (PARPORT_CONTROL_STROBE |
183 PARPORT_CONTROL_AUTOFD |
184 PARPORT_CONTROL_INIT |
185 PARPORT_CONTROL_SELECT);
186
187 parport_sunbpp_frob_control (p, wm, d & wm);
188}
189
190static unsigned char parport_sunbpp_read_status(struct parport *p)
191{
192 return status_sunbpp_to_pc(p);
193}
194
195static void parport_sunbpp_data_forward (struct parport *p)
196{
197 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
198 unsigned char value_tcr = sbus_readb(®s->p_tcr);
199
200 dprintk((KERN_DEBUG "forward\n"));
201 value_tcr &= ~P_TCR_DIR;
202 sbus_writeb(value_tcr, ®s->p_tcr);
203}
204
205static void parport_sunbpp_data_reverse (struct parport *p)
206{
207 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
208 u8 val = sbus_readb(®s->p_tcr);
209
210 dprintk((KERN_DEBUG "reverse\n"));
211 val |= P_TCR_DIR;
212 sbus_writeb(val, ®s->p_tcr);
213}
214
215static void parport_sunbpp_init_state(struct pardevice *dev, struct parport_state *s)
216{
217 s->u.pc.ctr = 0xc;
218 s->u.pc.ecr = 0x0;
219}
220
221static void parport_sunbpp_save_state(struct parport *p, struct parport_state *s)
222{
223 s->u.pc.ctr = parport_sunbpp_read_control(p);
224}
225
226static void parport_sunbpp_restore_state(struct parport *p, struct parport_state *s)
227{
228 parport_sunbpp_write_control(p, s->u.pc.ctr);
229}
230
231static struct parport_operations parport_sunbpp_ops =
232{
233 .write_data = parport_sunbpp_write_data,
234 .read_data = parport_sunbpp_read_data,
235
236 .write_control = parport_sunbpp_write_control,
237 .read_control = parport_sunbpp_read_control,
238 .frob_control = parport_sunbpp_frob_control,
239
240 .read_status = parport_sunbpp_read_status,
241
242 .enable_irq = parport_sunbpp_enable_irq,
243 .disable_irq = parport_sunbpp_disable_irq,
244
245 .data_forward = parport_sunbpp_data_forward,
246 .data_reverse = parport_sunbpp_data_reverse,
247
248 .init_state = parport_sunbpp_init_state,
249 .save_state = parport_sunbpp_save_state,
250 .restore_state = parport_sunbpp_restore_state,
251
252 .epp_write_data = parport_ieee1284_epp_write_data,
253 .epp_read_data = parport_ieee1284_epp_read_data,
254 .epp_write_addr = parport_ieee1284_epp_write_addr,
255 .epp_read_addr = parport_ieee1284_epp_read_addr,
256
257 .ecp_write_data = parport_ieee1284_ecp_write_data,
258 .ecp_read_data = parport_ieee1284_ecp_read_data,
259 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
260
261 .compat_write_data = parport_ieee1284_write_compat,
262 .nibble_read_data = parport_ieee1284_read_nibble,
263 .byte_read_data = parport_ieee1284_read_byte,
264
265 .owner = THIS_MODULE,
266};
267
268static int bpp_probe(struct platform_device *op)
269{
270 struct parport_operations *ops;
271 struct bpp_regs __iomem *regs;
272 int irq, dma, err = 0, size;
273 unsigned char value_tcr;
274 void __iomem *base;
275 struct parport *p;
276
277 irq = op->archdata.irqs[0];
278 base = of_ioremap(&op->resource[0], 0,
279 resource_size(&op->resource[0]),
280 "sunbpp");
281 if (!base)
282 return -ENODEV;
283
284 size = resource_size(&op->resource[0]);
285 dma = PARPORT_DMA_NONE;
286
287 ops = kmemdup(&parport_sunbpp_ops, sizeof(struct parport_operations),
288 GFP_KERNEL);
289 if (!ops)
290 goto out_unmap;
291
292 dprintk(("register_port\n"));
293 if (!(p = parport_register_port((unsigned long)base, irq, dma, ops)))
294 goto out_free_ops;
295
296 p->size = size;
297 p->dev = &op->dev;
298
299 if ((err = request_irq(p->irq, parport_irq_handler,
300 IRQF_SHARED, p->name, p)) != 0) {
301 goto out_put_port;
302 }
303
304 parport_sunbpp_enable_irq(p);
305
306 regs = (struct bpp_regs __iomem *)p->base;
307
308 value_tcr = sbus_readb(®s->p_tcr);
309 value_tcr &= ~P_TCR_DIR;
310 sbus_writeb(value_tcr, ®s->p_tcr);
311
312 printk(KERN_INFO "%s: sunbpp at 0x%lx\n", p->name, p->base);
313
314 dev_set_drvdata(&op->dev, p);
315
316 parport_announce_port(p);
317
318 return 0;
319
320out_put_port:
321 parport_put_port(p);
322
323out_free_ops:
324 kfree(ops);
325
326out_unmap:
327 of_iounmap(&op->resource[0], base, size);
328
329 return err;
330}
331
332static int bpp_remove(struct platform_device *op)
333{
334 struct parport *p = dev_get_drvdata(&op->dev);
335 struct parport_operations *ops = p->ops;
336
337 parport_remove_port(p);
338
339 if (p->irq != PARPORT_IRQ_NONE) {
340 parport_sunbpp_disable_irq(p);
341 free_irq(p->irq, p);
342 }
343
344 of_iounmap(&op->resource[0], (void __iomem *) p->base, p->size);
345 parport_put_port(p);
346 kfree(ops);
347
348 dev_set_drvdata(&op->dev, NULL);
349
350 return 0;
351}
352
353static const struct of_device_id bpp_match[] = {
354 {
355 .name = "SUNW,bpp",
356 },
357 {},
358};
359
360MODULE_DEVICE_TABLE(of, bpp_match);
361
362static struct platform_driver bpp_sbus_driver = {
363 .driver = {
364 .name = "bpp",
365 .of_match_table = bpp_match,
366 },
367 .probe = bpp_probe,
368 .remove = bpp_remove,
369};
370
371module_platform_driver(bpp_sbus_driver);
372
373MODULE_AUTHOR("Derrick J Brashear");
374MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port");
375MODULE_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port");
376MODULE_VERSION("2.0");
377MODULE_LICENSE("GPL");
378
