1 /* parport_sunbpp.c: Parallel-port routines for SBUS
3 * Author: Derrick J. Brashear <shadow@dementia.org>
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)
17 * Updated to new SBUS device framework: David S. Miller <davem@davemloft.net>
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>
30 #include <linux/of_device.h>
32 #include <linux/parport.h>
34 #include <asm/ptrace.h>
35 #include <linux/interrupt.h>
38 #include <asm/oplib.h> /* OpenProm Library */
39 #include <asm/dma.h> /* BPP uses LSI 64854 for DMA */
41 #include <asm/sunbpp.h>
45 #define dprintk(x) printk x
50 static void parport_sunbpp_disable_irq(struct parport *p)
52 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
55 tmp = sbus_readl(®s->p_csr);
57 sbus_writel(tmp, ®s->p_csr);
60 static void parport_sunbpp_enable_irq(struct parport *p)
62 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
65 tmp = sbus_readl(®s->p_csr);
67 sbus_writel(tmp, ®s->p_csr);
70 static void parport_sunbpp_write_data(struct parport *p, unsigned char d)
72 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
74 sbus_writeb(d, ®s->p_dr);
75 dprintk((KERN_DEBUG "wrote 0x%x\n", d));
78 static unsigned char parport_sunbpp_read_data(struct parport *p)
80 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
82 return sbus_readb(®s->p_dr);
86 static void control_pc_to_sunbpp(struct parport *p, unsigned char status)
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);
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;
101 sbus_writeb(value_or, ®s->p_or);
102 sbus_writeb(value_tcr, ®s->p_tcr);
106 static unsigned char status_sunbpp_to_pc(struct parport *p)
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);
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;
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));
129 static unsigned char control_sunbpp_to_pc(struct parport *p)
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);
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;
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));
150 static unsigned char parport_sunbpp_read_control(struct parport *p)
152 return control_sunbpp_to_pc(p);
155 static unsigned char parport_sunbpp_frob_control(struct parport *p,
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);
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;
169 value_tcr |= P_TCR_DS;
172 if (mask & PARPORT_CONTROL_AUTOFD) {
173 if (val & PARPORT_CONTROL_AUTOFD) {
174 value_or &= ~P_OR_AFXN;
176 value_or |= P_OR_AFXN;
179 if (mask & PARPORT_CONTROL_INIT) {
180 if (val & PARPORT_CONTROL_INIT) {
181 value_or &= ~P_OR_INIT;
183 value_or |= P_OR_INIT;
186 if (mask & PARPORT_CONTROL_SELECT) {
187 if (val & PARPORT_CONTROL_SELECT) {
188 value_or |= P_OR_SLCT_IN;
190 value_or &= ~P_OR_SLCT_IN;
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);
201 static void parport_sunbpp_write_control(struct parport *p, unsigned char d)
203 const unsigned char wm = (PARPORT_CONTROL_STROBE |
204 PARPORT_CONTROL_AUTOFD |
205 PARPORT_CONTROL_INIT |
206 PARPORT_CONTROL_SELECT);
208 parport_sunbpp_frob_control (p, wm, d & wm);
211 static unsigned char parport_sunbpp_read_status(struct parport *p)
213 return status_sunbpp_to_pc(p);
216 static void parport_sunbpp_data_forward (struct parport *p)
218 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
219 unsigned char value_tcr = sbus_readb(®s->p_tcr);
221 dprintk((KERN_DEBUG "forward\n"));
222 value_tcr &= ~P_TCR_DIR;
223 sbus_writeb(value_tcr, ®s->p_tcr);
226 static void parport_sunbpp_data_reverse (struct parport *p)
228 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
229 u8 val = sbus_readb(®s->p_tcr);
231 dprintk((KERN_DEBUG "reverse\n"));
233 sbus_writeb(val, ®s->p_tcr);
236 static void parport_sunbpp_init_state(struct pardevice *dev, struct parport_state *s)
242 static void parport_sunbpp_save_state(struct parport *p, struct parport_state *s)
244 s->u.pc.ctr = parport_sunbpp_read_control(p);
247 static void parport_sunbpp_restore_state(struct parport *p, struct parport_state *s)
249 parport_sunbpp_write_control(p, s->u.pc.ctr);
252 static struct parport_operations parport_sunbpp_ops =
254 .write_data = parport_sunbpp_write_data,
255 .read_data = parport_sunbpp_read_data,
257 .write_control = parport_sunbpp_write_control,
258 .read_control = parport_sunbpp_read_control,
259 .frob_control = parport_sunbpp_frob_control,
261 .read_status = parport_sunbpp_read_status,
263 .enable_irq = parport_sunbpp_enable_irq,
264 .disable_irq = parport_sunbpp_disable_irq,
266 .data_forward = parport_sunbpp_data_forward,
267 .data_reverse = parport_sunbpp_data_reverse,
269 .init_state = parport_sunbpp_init_state,
270 .save_state = parport_sunbpp_save_state,
271 .restore_state = parport_sunbpp_restore_state,
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,
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,
282 .compat_write_data = parport_ieee1284_write_compat,
283 .nibble_read_data = parport_ieee1284_read_nibble,
284 .byte_read_data = parport_ieee1284_read_byte,
286 .owner = THIS_MODULE,
289 static int __devinit bpp_probe(struct of_device *op, const struct of_device_id *match)
291 struct parport_operations *ops;
292 struct bpp_regs __iomem *regs;
293 int irq, dma, err = 0, size;
294 unsigned char value_tcr;
299 base = of_ioremap(&op->resource[0], 0,
300 resource_size(&op->resource[0]),
305 size = resource_size(&op->resource[0]);
306 dma = PARPORT_DMA_NONE;
308 ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
312 memcpy (ops, &parport_sunbpp_ops, sizeof(struct parport_operations));
314 dprintk(("register_port\n"));
315 if (!(p = parport_register_port((unsigned long)base, irq, dma, ops)))
321 if ((err = request_irq(p->irq, parport_irq_handler,
322 IRQF_SHARED, p->name, p)) != 0) {
326 parport_sunbpp_enable_irq(p);
328 regs = (struct bpp_regs __iomem *)p->base;
330 value_tcr = sbus_readb(®s->p_tcr);
331 value_tcr &= ~P_TCR_DIR;
332 sbus_writeb(value_tcr, ®s->p_tcr);
334 printk(KERN_INFO "%s: sunbpp at 0x%lx\n", p->name, p->base);
336 dev_set_drvdata(&op->dev, p);
338 parport_announce_port(p);
349 of_iounmap(&op->resource[0], base, size);
354 static int __devexit bpp_remove(struct of_device *op)
356 struct parport *p = dev_get_drvdata(&op->dev);
357 struct parport_operations *ops = p->ops;
359 parport_remove_port(p);
361 if (p->irq != PARPORT_IRQ_NONE) {
362 parport_sunbpp_disable_irq(p);
366 of_iounmap(&op->resource[0], (void __iomem *) p->base, p->size);
370 dev_set_drvdata(&op->dev, NULL);
375 static const struct of_device_id bpp_match[] = {
382 MODULE_DEVICE_TABLE(of, bpp_match);
384 static struct of_platform_driver bpp_sbus_driver = {
386 .match_table = bpp_match,
388 .remove = __devexit_p(bpp_remove),
391 static int __init parport_sunbpp_init(void)
393 return of_register_driver(&bpp_sbus_driver, &of_bus_type);
396 static void __exit parport_sunbpp_exit(void)
398 of_unregister_driver(&bpp_sbus_driver);
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");
407 module_init(parport_sunbpp_init)
408 module_exit(parport_sunbpp_exit)