1// SPDX-License-Identifier: GPL-2.0-only
  2/* parport_sunbpp.c: Parallel-port routines for SBUS
  3 * 
  4 * Author: Derrick J. Brashear <shadow@dementia.org>
  5 *
  6 * based on work by:
  7 *          Phil Blundell <philb@gnu.org>
  8 *          Tim Waugh <tim@cyberelk.demon.co.uk>
  9 *	    Jose Renau <renau@acm.org>
 10 *          David Campbell <campbell@tirian.che.curtin.edu.au>
 11 *          Grant Guenther <grant@torque.net>
 12 *          Eddie C. Dost <ecd@skynet.be>
 13 *          Stephen Williams (steve@icarus.com)
 14 *          Gus Baldauf (gbaldauf@ix.netcom.com)
 15 *          Peter Zaitcev
 16 *          Tom Dyas
 17 *
 18 * Updated to new SBUS device framework: David S. Miller <davem@davemloft.net>
 19 * 
 20 */
 21
 22#include <linux/string.h>
 23#include <linux/module.h>
 24#include <linux/delay.h>
 25#include <linux/errno.h>
 26#include <linux/ioport.h>
 27#include <linux/kernel.h>
 28#include <linux/slab.h>
 29#include <linux/init.h>
 30#include <linux/of.h>
 31#include <linux/of_device.h>
 32
 33#include <linux/parport.h>
 34
 35#include <asm/ptrace.h>
 36#include <linux/interrupt.h>
 37
 38#include <asm/io.h>
 39#include <asm/oplib.h>           /* OpenProm Library */
 40#include <asm/dma.h>             /* BPP uses LSI 64854 for DMA */
 41#include <asm/irq.h>
 42#include <asm/sunbpp.h>
 43
 44#undef __SUNBPP_DEBUG
 45#ifdef __SUNBPP_DEBUG
 46#define dprintk(x) printk x
 47#else
 48#define dprintk(x)
 49#endif
 50
 51static void parport_sunbpp_disable_irq(struct parport *p)
 52{
 53	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
 54	u32 tmp;
 55
 56	tmp = sbus_readl(&regs->p_csr);
 57	tmp &= ~DMA_INT_ENAB;
 58	sbus_writel(tmp, &regs->p_csr);
 59}
 60
 61static void parport_sunbpp_enable_irq(struct parport *p)
 62{
 63	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
 64	u32 tmp;
 65
 66	tmp = sbus_readl(&regs->p_csr);
 67	tmp |= DMA_INT_ENAB;
 68	sbus_writel(tmp, &regs->p_csr);
 69}
 70
 71static void parport_sunbpp_write_data(struct parport *p, unsigned char d)
 72{
 73	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
 74
 75	sbus_writeb(d, &regs->p_dr);
 76	dprintk((KERN_DEBUG "wrote 0x%x\n", d));
 77}
 78
 79static unsigned char parport_sunbpp_read_data(struct parport *p)
 80{
 81	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
 82
 83	return sbus_readb(&regs->p_dr);
 84}
 85
 86static unsigned char status_sunbpp_to_pc(struct parport *p)
 87{
 88	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
 89	unsigned char bits = 0;
 90	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
 91	unsigned char value_ir = sbus_readb(&regs->p_ir);
 92
 93	if (!(value_ir & P_IR_ERR))
 94		bits |= PARPORT_STATUS_ERROR;
 95	if (!(value_ir & P_IR_SLCT))
 96		bits |= PARPORT_STATUS_SELECT;
 97	if (!(value_ir & P_IR_PE))
 98		bits |= PARPORT_STATUS_PAPEROUT;
 99	if (value_tcr & P_TCR_ACK)
100		bits |= PARPORT_STATUS_ACK;
101	if (!(value_tcr & P_TCR_BUSY))
102		bits |= PARPORT_STATUS_BUSY;
103
104	dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", value_tcr, value_ir));
105	dprintk((KERN_DEBUG "read status 0x%x\n", bits));
106	return bits;
107}
108
109static unsigned char control_sunbpp_to_pc(struct parport *p)
110{
111	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
112	unsigned char bits = 0;
113	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
114	unsigned char value_or = sbus_readb(&regs->p_or);
115
116	if (!(value_tcr & P_TCR_DS))
117		bits |= PARPORT_CONTROL_STROBE;
118	if (!(value_or & P_OR_AFXN))
119		bits |= PARPORT_CONTROL_AUTOFD;
120	if (!(value_or & P_OR_INIT))
121		bits |= PARPORT_CONTROL_INIT;
122	if (value_or & P_OR_SLCT_IN)
123		bits |= PARPORT_CONTROL_SELECT;
124
125	dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", value_tcr, value_or));
126	dprintk((KERN_DEBUG "read control 0x%x\n", bits));
127	return bits;
128}
129
130static unsigned char parport_sunbpp_read_control(struct parport *p)
131{
132	return control_sunbpp_to_pc(p);
133}
134
135static unsigned char parport_sunbpp_frob_control(struct parport *p,
136						 unsigned char mask,
137						 unsigned char val)
138{
139	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
140	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
141	unsigned char value_or = sbus_readb(&regs->p_or);
142
143	dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n",
144		 value_tcr, value_or));
145	if (mask & PARPORT_CONTROL_STROBE) {
146		if (val & PARPORT_CONTROL_STROBE) {
147			value_tcr &= ~P_TCR_DS;
148		} else {
149			value_tcr |= P_TCR_DS;
150		}
151	}
152	if (mask & PARPORT_CONTROL_AUTOFD) {
153		if (val & PARPORT_CONTROL_AUTOFD) {
154			value_or &= ~P_OR_AFXN;
155		} else {
156			value_or |= P_OR_AFXN;
157		}
158	}
159	if (mask & PARPORT_CONTROL_INIT) {
160		if (val & PARPORT_CONTROL_INIT) {
161			value_or &= ~P_OR_INIT;
162		} else {
163			value_or |= P_OR_INIT;
164		}
165	}
166	if (mask & PARPORT_CONTROL_SELECT) {
167		if (val & PARPORT_CONTROL_SELECT) {
168			value_or |= P_OR_SLCT_IN;
169		} else {
170			value_or &= ~P_OR_SLCT_IN;
171		}
172	}
173
174	sbus_writeb(value_or, &regs->p_or);
175	sbus_writeb(value_tcr, &regs->p_tcr);
176	dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n",
177		 value_tcr, value_or));
178	return parport_sunbpp_read_control(p);
179}
180
181static void parport_sunbpp_write_control(struct parport *p, unsigned char d)
182{
183	const unsigned char wm = (PARPORT_CONTROL_STROBE |
184				  PARPORT_CONTROL_AUTOFD |
185				  PARPORT_CONTROL_INIT |
186				  PARPORT_CONTROL_SELECT);
187
188	parport_sunbpp_frob_control (p, wm, d & wm);
189}
190
191static unsigned char parport_sunbpp_read_status(struct parport *p)
192{
193	return status_sunbpp_to_pc(p);
194}
195
196static void parport_sunbpp_data_forward (struct parport *p)
197{
198	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
199	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
200
201	dprintk((KERN_DEBUG "forward\n"));
202	value_tcr &= ~P_TCR_DIR;
203	sbus_writeb(value_tcr, &regs->p_tcr);
204}
205
206static void parport_sunbpp_data_reverse (struct parport *p)
207{
208	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
209	u8 val = sbus_readb(&regs->p_tcr);
210
211	dprintk((KERN_DEBUG "reverse\n"));
212	val |= P_TCR_DIR;
213	sbus_writeb(val, &regs->p_tcr);
214}
215
216static void parport_sunbpp_init_state(struct pardevice *dev, struct parport_state *s)
217{
218	s->u.pc.ctr = 0xc;
219	s->u.pc.ecr = 0x0;
220}
221
222static void parport_sunbpp_save_state(struct parport *p, struct parport_state *s)
223{
224	s->u.pc.ctr = parport_sunbpp_read_control(p);
225}
226
227static void parport_sunbpp_restore_state(struct parport *p, struct parport_state *s)
228{
229	parport_sunbpp_write_control(p, s->u.pc.ctr);
230}
231
232static struct parport_operations parport_sunbpp_ops = 
233{
234	.write_data	= parport_sunbpp_write_data,
235	.read_data	= parport_sunbpp_read_data,
236
237	.write_control	= parport_sunbpp_write_control,
238	.read_control	= parport_sunbpp_read_control,
239	.frob_control	= parport_sunbpp_frob_control,
240
241	.read_status	= parport_sunbpp_read_status,
242
243	.enable_irq	= parport_sunbpp_enable_irq,
244	.disable_irq	= parport_sunbpp_disable_irq,
245
246	.data_forward	= parport_sunbpp_data_forward,
247	.data_reverse	= parport_sunbpp_data_reverse,
248
249	.init_state	= parport_sunbpp_init_state,
250	.save_state	= parport_sunbpp_save_state,
251	.restore_state	= parport_sunbpp_restore_state,
252
253	.epp_write_data	= parport_ieee1284_epp_write_data,
254	.epp_read_data	= parport_ieee1284_epp_read_data,
255	.epp_write_addr	= parport_ieee1284_epp_write_addr,
256	.epp_read_addr	= parport_ieee1284_epp_read_addr,
257
258	.ecp_write_data	= parport_ieee1284_ecp_write_data,
259	.ecp_read_data	= parport_ieee1284_ecp_read_data,
260	.ecp_write_addr	= parport_ieee1284_ecp_write_addr,
261
262	.compat_write_data	= parport_ieee1284_write_compat,
263	.nibble_read_data	= parport_ieee1284_read_nibble,
264	.byte_read_data		= parport_ieee1284_read_byte,
265
266	.owner		= THIS_MODULE,
267};
268
269static int bpp_probe(struct platform_device *op)
270{
271	struct parport_operations *ops;
272	struct bpp_regs __iomem *regs;
273	int irq, dma, err = 0, size;
274	unsigned char value_tcr;
275	void __iomem *base;
276	struct parport *p;
277
278	irq = op->archdata.irqs[0];
279	base = of_ioremap(&op->resource[0], 0,
280			  resource_size(&op->resource[0]),
281			  "sunbpp");
282	if (!base)
283		return -ENODEV;
284
285	size = resource_size(&op->resource[0]);
286	dma = PARPORT_DMA_NONE;
287
288	ops = kmemdup(&parport_sunbpp_ops, sizeof(struct parport_operations),
289		      GFP_KERNEL);
290	if (!ops) {
291		err = -ENOMEM;
292		goto out_unmap;
293	}
294
295	dprintk(("register_port\n"));
296	if (!(p = parport_register_port((unsigned long)base, irq, dma, ops))) {
297		err = -ENOMEM;
298		goto out_free_ops;
299	}
300
301	p->size = size;
302	p->dev = &op->dev;
303
304	if ((err = request_irq(p->irq, parport_irq_handler,
305			       IRQF_SHARED, p->name, p)) != 0) {
306		goto out_put_port;
307	}
308
309	parport_sunbpp_enable_irq(p);
310
311	regs = (struct bpp_regs __iomem *)p->base;
312
313	value_tcr = sbus_readb(&regs->p_tcr);
314	value_tcr &= ~P_TCR_DIR;
315	sbus_writeb(value_tcr, &regs->p_tcr);
316
317	pr_info("%s: sunbpp at 0x%lx\n", p->name, p->base);
318
319	dev_set_drvdata(&op->dev, p);
320
321	parport_announce_port(p);
322
323	return 0;
324
325out_put_port:
326	parport_put_port(p);
327
328out_free_ops:
329	kfree(ops);
330
331out_unmap:
332	of_iounmap(&op->resource[0], base, size);
333
334	return err;
335}
336
337static int bpp_remove(struct platform_device *op)
338{
339	struct parport *p = dev_get_drvdata(&op->dev);
340	struct parport_operations *ops = p->ops;
341
342	parport_remove_port(p);
343
344	if (p->irq != PARPORT_IRQ_NONE) {
345		parport_sunbpp_disable_irq(p);
346		free_irq(p->irq, p);
347	}
348
349	of_iounmap(&op->resource[0], (void __iomem *) p->base, p->size);
350	parport_put_port(p);
351	kfree(ops);
352
353	dev_set_drvdata(&op->dev, NULL);
354
355	return 0;
356}
357
358static const struct of_device_id bpp_match[] = {
359	{
360		.name = "SUNW,bpp",
361	},
362	{},
363};
364
365MODULE_DEVICE_TABLE(of, bpp_match);
366
367static struct platform_driver bpp_sbus_driver = {
368	.driver = {
369		.name = "bpp",
370		.of_match_table = bpp_match,
371	},
372	.probe		= bpp_probe,
373	.remove		= bpp_remove,
374};
375
376module_platform_driver(bpp_sbus_driver);
377
378MODULE_AUTHOR("Derrick J Brashear");
379MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port");
380MODULE_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port");
381MODULE_VERSION("2.0");
382MODULE_LICENSE("GPL");

  1// SPDX-License-Identifier: GPL-2.0-only
  2/* parport_sunbpp.c: Parallel-port routines for SBUS
  3 * 
  4 * Author: Derrick J. Brashear <shadow@dementia.org>
  5 *
  6 * based on work by:
  7 *          Phil Blundell <philb@gnu.org>
  8 *          Tim Waugh <tim@cyberelk.demon.co.uk>
  9 *	    Jose Renau <renau@acm.org>
 10 *          David Campbell <campbell@tirian.che.curtin.edu.au>
 11 *          Grant Guenther <grant@torque.net>
 12 *          Eddie C. Dost <ecd@skynet.be>
 13 *          Stephen Williams (steve@icarus.com)
 14 *          Gus Baldauf (gbaldauf@ix.netcom.com)
 15 *          Peter Zaitcev
 16 *          Tom Dyas
 17 *
 18 * Updated to new SBUS device framework: David S. Miller <davem@davemloft.net>
 19 * 
 20 */
 21
 22#include <linux/string.h>
 23#include <linux/module.h>
 24#include <linux/delay.h>
 25#include <linux/errno.h>
 26#include <linux/ioport.h>
 27#include <linux/kernel.h>
 28#include <linux/slab.h>
 29#include <linux/init.h>
 30#include <linux/of.h>
 31#include <linux/platform_device.h>
 32
 33#include <linux/parport.h>
 34
 35#include <asm/ptrace.h>
 36#include <linux/interrupt.h>
 37
 38#include <asm/io.h>
 39#include <asm/oplib.h>           /* OpenProm Library */
 40#include <asm/dma.h>             /* BPP uses LSI 64854 for DMA */
 41#include <asm/irq.h>
 42#include <asm/sunbpp.h>
 43
 44#undef __SUNBPP_DEBUG
 45#ifdef __SUNBPP_DEBUG
 46#define dprintk(x) printk x
 47#else
 48#define dprintk(x)
 49#endif
 50
 51static void parport_sunbpp_disable_irq(struct parport *p)
 52{
 53	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
 54	u32 tmp;
 55
 56	tmp = sbus_readl(&regs->p_csr);
 57	tmp &= ~DMA_INT_ENAB;
 58	sbus_writel(tmp, &regs->p_csr);
 59}
 60
 61static void parport_sunbpp_enable_irq(struct parport *p)
 62{
 63	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
 64	u32 tmp;
 65
 66	tmp = sbus_readl(&regs->p_csr);
 67	tmp |= DMA_INT_ENAB;
 68	sbus_writel(tmp, &regs->p_csr);
 69}
 70
 71static void parport_sunbpp_write_data(struct parport *p, unsigned char d)
 72{
 73	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
 74
 75	sbus_writeb(d, &regs->p_dr);
 76	dprintk((KERN_DEBUG "wrote 0x%x\n", d));
 77}
 78
 79static unsigned char parport_sunbpp_read_data(struct parport *p)
 80{
 81	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
 82
 83	return sbus_readb(&regs->p_dr);
 84}
 85
 86static unsigned char status_sunbpp_to_pc(struct parport *p)
 87{
 88	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
 89	unsigned char bits = 0;
 90	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
 91	unsigned char value_ir = sbus_readb(&regs->p_ir);
 92
 93	if (!(value_ir & P_IR_ERR))
 94		bits |= PARPORT_STATUS_ERROR;
 95	if (!(value_ir & P_IR_SLCT))
 96		bits |= PARPORT_STATUS_SELECT;
 97	if (!(value_ir & P_IR_PE))
 98		bits |= PARPORT_STATUS_PAPEROUT;
 99	if (value_tcr & P_TCR_ACK)
100		bits |= PARPORT_STATUS_ACK;
101	if (!(value_tcr & P_TCR_BUSY))
102		bits |= PARPORT_STATUS_BUSY;
103
104	dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", value_tcr, value_ir));
105	dprintk((KERN_DEBUG "read status 0x%x\n", bits));
106	return bits;
107}
108
109static unsigned char control_sunbpp_to_pc(struct parport *p)
110{
111	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
112	unsigned char bits = 0;
113	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
114	unsigned char value_or = sbus_readb(&regs->p_or);
115
116	if (!(value_tcr & P_TCR_DS))
117		bits |= PARPORT_CONTROL_STROBE;
118	if (!(value_or & P_OR_AFXN))
119		bits |= PARPORT_CONTROL_AUTOFD;
120	if (!(value_or & P_OR_INIT))
121		bits |= PARPORT_CONTROL_INIT;
122	if (value_or & P_OR_SLCT_IN)
123		bits |= PARPORT_CONTROL_SELECT;
124
125	dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", value_tcr, value_or));
126	dprintk((KERN_DEBUG "read control 0x%x\n", bits));
127	return bits;
128}
129
130static unsigned char parport_sunbpp_read_control(struct parport *p)
131{
132	return control_sunbpp_to_pc(p);
133}
134
135static unsigned char parport_sunbpp_frob_control(struct parport *p,
136						 unsigned char mask,
137						 unsigned char val)
138{
139	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
140	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
141	unsigned char value_or = sbus_readb(&regs->p_or);
142
143	dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n",
144		 value_tcr, value_or));
145	if (mask & PARPORT_CONTROL_STROBE) {
146		if (val & PARPORT_CONTROL_STROBE) {
147			value_tcr &= ~P_TCR_DS;
148		} else {
149			value_tcr |= P_TCR_DS;
150		}
151	}
152	if (mask & PARPORT_CONTROL_AUTOFD) {
153		if (val & PARPORT_CONTROL_AUTOFD) {
154			value_or &= ~P_OR_AFXN;
155		} else {
156			value_or |= P_OR_AFXN;
157		}
158	}
159	if (mask & PARPORT_CONTROL_INIT) {
160		if (val & PARPORT_CONTROL_INIT) {
161			value_or &= ~P_OR_INIT;
162		} else {
163			value_or |= P_OR_INIT;
164		}
165	}
166	if (mask & PARPORT_CONTROL_SELECT) {
167		if (val & PARPORT_CONTROL_SELECT) {
168			value_or |= P_OR_SLCT_IN;
169		} else {
170			value_or &= ~P_OR_SLCT_IN;
171		}
172	}
173
174	sbus_writeb(value_or, &regs->p_or);
175	sbus_writeb(value_tcr, &regs->p_tcr);
176	dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n",
177		 value_tcr, value_or));
178	return parport_sunbpp_read_control(p);
179}
180
181static void parport_sunbpp_write_control(struct parport *p, unsigned char d)
182{
183	const unsigned char wm = (PARPORT_CONTROL_STROBE |
184				  PARPORT_CONTROL_AUTOFD |
185				  PARPORT_CONTROL_INIT |
186				  PARPORT_CONTROL_SELECT);
187
188	parport_sunbpp_frob_control (p, wm, d & wm);
189}
190
191static unsigned char parport_sunbpp_read_status(struct parport *p)
192{
193	return status_sunbpp_to_pc(p);
194}
195
196static void parport_sunbpp_data_forward (struct parport *p)
197{
198	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
199	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
200
201	dprintk((KERN_DEBUG "forward\n"));
202	value_tcr &= ~P_TCR_DIR;
203	sbus_writeb(value_tcr, &regs->p_tcr);
204}
205
206static void parport_sunbpp_data_reverse (struct parport *p)
207{
208	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
209	u8 val = sbus_readb(&regs->p_tcr);
210
211	dprintk((KERN_DEBUG "reverse\n"));
212	val |= P_TCR_DIR;
213	sbus_writeb(val, &regs->p_tcr);
214}
215
216static void parport_sunbpp_init_state(struct pardevice *dev, struct parport_state *s)
217{
218	s->u.pc.ctr = 0xc;
219	s->u.pc.ecr = 0x0;
220}
221
222static void parport_sunbpp_save_state(struct parport *p, struct parport_state *s)
223{
224	s->u.pc.ctr = parport_sunbpp_read_control(p);
225}
226
227static void parport_sunbpp_restore_state(struct parport *p, struct parport_state *s)
228{
229	parport_sunbpp_write_control(p, s->u.pc.ctr);
230}
231
232static struct parport_operations parport_sunbpp_ops = 
233{
234	.write_data	= parport_sunbpp_write_data,
235	.read_data	= parport_sunbpp_read_data,
236
237	.write_control	= parport_sunbpp_write_control,
238	.read_control	= parport_sunbpp_read_control,
239	.frob_control	= parport_sunbpp_frob_control,
240
241	.read_status	= parport_sunbpp_read_status,
242
243	.enable_irq	= parport_sunbpp_enable_irq,
244	.disable_irq	= parport_sunbpp_disable_irq,
245
246	.data_forward	= parport_sunbpp_data_forward,
247	.data_reverse	= parport_sunbpp_data_reverse,
248
249	.init_state	= parport_sunbpp_init_state,
250	.save_state	= parport_sunbpp_save_state,
251	.restore_state	= parport_sunbpp_restore_state,
252
253	.epp_write_data	= parport_ieee1284_epp_write_data,
254	.epp_read_data	= parport_ieee1284_epp_read_data,
255	.epp_write_addr	= parport_ieee1284_epp_write_addr,
256	.epp_read_addr	= parport_ieee1284_epp_read_addr,
257
258	.ecp_write_data	= parport_ieee1284_ecp_write_data,
259	.ecp_read_data	= parport_ieee1284_ecp_read_data,
260	.ecp_write_addr	= parport_ieee1284_ecp_write_addr,
261
262	.compat_write_data	= parport_ieee1284_write_compat,
263	.nibble_read_data	= parport_ieee1284_read_nibble,
264	.byte_read_data		= parport_ieee1284_read_byte,
265
266	.owner		= THIS_MODULE,
267};
268
269static int bpp_probe(struct platform_device *op)
270{
271	struct parport_operations *ops;
272	struct bpp_regs __iomem *regs;
273	int irq, dma, err = 0, size;
274	unsigned char value_tcr;
275	void __iomem *base;
276	struct parport *p;
277
278	irq = op->archdata.irqs[0];
279	base = of_ioremap(&op->resource[0], 0,
280			  resource_size(&op->resource[0]),
281			  "sunbpp");
282	if (!base)
283		return -ENODEV;
284
285	size = resource_size(&op->resource[0]);
286	dma = PARPORT_DMA_NONE;
287
288	ops = kmemdup(&parport_sunbpp_ops, sizeof(struct parport_operations),
289		      GFP_KERNEL);
290	if (!ops) {
291		err = -ENOMEM;
292		goto out_unmap;
293	}
294
295	dprintk(("register_port\n"));
296	if (!(p = parport_register_port((unsigned long)base, irq, dma, ops))) {
297		err = -ENOMEM;
298		goto out_free_ops;
299	}
300
301	p->size = size;
302	p->dev = &op->dev;
303
304	if ((err = request_irq(p->irq, parport_irq_handler,
305			       IRQF_SHARED, p->name, p)) != 0) {
306		goto out_put_port;
307	}
308
309	parport_sunbpp_enable_irq(p);
310
311	regs = (struct bpp_regs __iomem *)p->base;
312
313	value_tcr = sbus_readb(&regs->p_tcr);
314	value_tcr &= ~P_TCR_DIR;
315	sbus_writeb(value_tcr, &regs->p_tcr);
316
317	pr_info("%s: sunbpp at 0x%lx\n", p->name, p->base);
318
319	dev_set_drvdata(&op->dev, p);
320
321	parport_announce_port(p);
322
323	return 0;
324
325out_put_port:
326	parport_put_port(p);
327
328out_free_ops:
329	kfree(ops);
330
331out_unmap:
332	of_iounmap(&op->resource[0], base, size);
333
334	return err;
335}
336
337static int bpp_remove(struct platform_device *op)
338{
339	struct parport *p = dev_get_drvdata(&op->dev);
340	struct parport_operations *ops = p->ops;
341
342	parport_remove_port(p);
343
344	if (p->irq != PARPORT_IRQ_NONE) {
345		parport_sunbpp_disable_irq(p);
346		free_irq(p->irq, p);
347	}
348
349	of_iounmap(&op->resource[0], (void __iomem *) p->base, p->size);
350	parport_put_port(p);
351	kfree(ops);
352
353	dev_set_drvdata(&op->dev, NULL);
354
355	return 0;
356}
357
358static const struct of_device_id bpp_match[] = {
359	{
360		.name = "SUNW,bpp",
361	},
362	{},
363};
364
365MODULE_DEVICE_TABLE(of, bpp_match);
366
367static struct platform_driver bpp_sbus_driver = {
368	.driver = {
369		.name = "bpp",
370		.of_match_table = bpp_match,
371	},
372	.probe		= bpp_probe,
373	.remove		= bpp_remove,
374};
375
376module_platform_driver(bpp_sbus_driver);
377
378MODULE_AUTHOR("Derrick J Brashear");
379MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port");
 
380MODULE_VERSION("2.0");
381MODULE_LICENSE("GPL");