[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / parport / parport_sunbpp.c

/* parport_sunbpp.c: Parallel-port routines for SBUS
 * 
 * Author: Derrick J. Brashear <shadow@dementia.org>
 *
 * based on work by:
 *          Phil Blundell <philb@gnu.org>
 *          Tim Waugh <tim@cyberelk.demon.co.uk>
 *	    Jose Renau <renau@acm.org>
 *          David Campbell <campbell@tirian.che.curtin.edu.au>
 *          Grant Guenther <grant@torque.net>
 *          Eddie C. Dost <ecd@skynet.be>
 *          Stephen Williams (steve@icarus.com)
 *          Gus Baldauf (gbaldauf@ix.netcom.com)
 *          Peter Zaitcev
 *          Tom Dyas
 *
 * Updated to new SBUS device framework: David S. Miller <davem@davemloft.net>
 * 
 */

#include <linux/string.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/of_device.h>

#include <linux/parport.h>

#include <asm/ptrace.h>
#include <linux/interrupt.h>

#include <asm/io.h>
#include <asm/oplib.h>           /* OpenProm Library */
#include <asm/dma.h>             /* BPP uses LSI 64854 for DMA */
#include <asm/irq.h>
#include <asm/sunbpp.h>

#undef __SUNBPP_DEBUG
#ifdef __SUNBPP_DEBUG
#define dprintk(x) printk x
#else
#define dprintk(x)
#endif

static void parport_sunbpp_disable_irq(struct parport *p)
{
	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
	u32 tmp;

	tmp = sbus_readl(&regs->p_csr);
	tmp &= ~DMA_INT_ENAB;
	sbus_writel(tmp, &regs->p_csr);
}

static void parport_sunbpp_enable_irq(struct parport *p)
{
	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
	u32 tmp;

	tmp = sbus_readl(&regs->p_csr);
	tmp |= DMA_INT_ENAB;
	sbus_writel(tmp, &regs->p_csr);
}

static void parport_sunbpp_write_data(struct parport *p, unsigned char d)
{
	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;

	sbus_writeb(d, &regs->p_dr);
	dprintk((KERN_DEBUG "wrote 0x%x\n", d));
}

static unsigned char parport_sunbpp_read_data(struct parport *p)
{
	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;

	return sbus_readb(&regs->p_dr);
}

static unsigned char status_sunbpp_to_pc(struct parport *p)
{
	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
	unsigned char bits = 0;
	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
	unsigned char value_ir = sbus_readb(&regs->p_ir);

	if (!(value_ir & P_IR_ERR))
		bits |= PARPORT_STATUS_ERROR;
	if (!(value_ir & P_IR_SLCT))
		bits |= PARPORT_STATUS_SELECT;
	if (!(value_ir & P_IR_PE))
		bits |= PARPORT_STATUS_PAPEROUT;
	if (value_tcr & P_TCR_ACK)
		bits |= PARPORT_STATUS_ACK;
	if (!(value_tcr & P_TCR_BUSY))
		bits |= PARPORT_STATUS_BUSY;

	dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", value_tcr, value_ir));
	dprintk((KERN_DEBUG "read status 0x%x\n", bits));
	return bits;
}

static unsigned char control_sunbpp_to_pc(struct parport *p)
{
	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
	unsigned char bits = 0;
	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
	unsigned char value_or = sbus_readb(&regs->p_or);

	if (!(value_tcr & P_TCR_DS))
		bits |= PARPORT_CONTROL_STROBE;
	if (!(value_or & P_OR_AFXN))
		bits |= PARPORT_CONTROL_AUTOFD;
	if (!(value_or & P_OR_INIT))
		bits |= PARPORT_CONTROL_INIT;
	if (value_or & P_OR_SLCT_IN)
		bits |= PARPORT_CONTROL_SELECT;

	dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", value_tcr, value_or));
	dprintk((KERN_DEBUG "read control 0x%x\n", bits));
	return bits;
}

static unsigned char parport_sunbpp_read_control(struct parport *p)
{
	return control_sunbpp_to_pc(p);
}

static unsigned char parport_sunbpp_frob_control(struct parport *p,
						 unsigned char mask,
						 unsigned char val)
{
	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
	unsigned char value_or = sbus_readb(&regs->p_or);

	dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n",
		 value_tcr, value_or));
	if (mask & PARPORT_CONTROL_STROBE) {
		if (val & PARPORT_CONTROL_STROBE) {
			value_tcr &= ~P_TCR_DS;
		} else {
			value_tcr |= P_TCR_DS;
		}
	}
	if (mask & PARPORT_CONTROL_AUTOFD) {
		if (val & PARPORT_CONTROL_AUTOFD) {
			value_or &= ~P_OR_AFXN;
		} else {
			value_or |= P_OR_AFXN;
		}
	}
	if (mask & PARPORT_CONTROL_INIT) {
		if (val & PARPORT_CONTROL_INIT) {
			value_or &= ~P_OR_INIT;
		} else {
			value_or |= P_OR_INIT;
		}
	}
	if (mask & PARPORT_CONTROL_SELECT) {
		if (val & PARPORT_CONTROL_SELECT) {
			value_or |= P_OR_SLCT_IN;
		} else {
			value_or &= ~P_OR_SLCT_IN;
		}
	}

	sbus_writeb(value_or, &regs->p_or);
	sbus_writeb(value_tcr, &regs->p_tcr);
	dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n",
		 value_tcr, value_or));
	return parport_sunbpp_read_control(p);
}

static void parport_sunbpp_write_control(struct parport *p, unsigned char d)
{
	const unsigned char wm = (PARPORT_CONTROL_STROBE |
				  PARPORT_CONTROL_AUTOFD |
				  PARPORT_CONTROL_INIT |
				  PARPORT_CONTROL_SELECT);

	parport_sunbpp_frob_control (p, wm, d & wm);
}

static unsigned char parport_sunbpp_read_status(struct parport *p)
{
	return status_sunbpp_to_pc(p);
}

static void parport_sunbpp_data_forward (struct parport *p)
{
	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
	unsigned char value_tcr = sbus_readb(&regs->p_tcr);

	dprintk((KERN_DEBUG "forward\n"));
	value_tcr &= ~P_TCR_DIR;
	sbus_writeb(value_tcr, &regs->p_tcr);
}

static void parport_sunbpp_data_reverse (struct parport *p)
{
	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
	u8 val = sbus_readb(&regs->p_tcr);

	dprintk((KERN_DEBUG "reverse\n"));
	val |= P_TCR_DIR;
	sbus_writeb(val, &regs->p_tcr);
}

static void parport_sunbpp_init_state(struct pardevice *dev, struct parport_state *s)
{
	s->u.pc.ctr = 0xc;
	s->u.pc.ecr = 0x0;
}

static void parport_sunbpp_save_state(struct parport *p, struct parport_state *s)
{
	s->u.pc.ctr = parport_sunbpp_read_control(p);
}

static void parport_sunbpp_restore_state(struct parport *p, struct parport_state *s)
{
	parport_sunbpp_write_control(p, s->u.pc.ctr);
}

static struct parport_operations parport_sunbpp_ops = 
{
	.write_data	= parport_sunbpp_write_data,
	.read_data	= parport_sunbpp_read_data,

	.write_control	= parport_sunbpp_write_control,
	.read_control	= parport_sunbpp_read_control,
	.frob_control	= parport_sunbpp_frob_control,

	.read_status	= parport_sunbpp_read_status,

	.enable_irq	= parport_sunbpp_enable_irq,
	.disable_irq	= parport_sunbpp_disable_irq,

	.data_forward	= parport_sunbpp_data_forward,
	.data_reverse	= parport_sunbpp_data_reverse,

	.init_state	= parport_sunbpp_init_state,
	.save_state	= parport_sunbpp_save_state,
	.restore_state	= parport_sunbpp_restore_state,

	.epp_write_data	= parport_ieee1284_epp_write_data,
	.epp_read_data	= parport_ieee1284_epp_read_data,
	.epp_write_addr	= parport_ieee1284_epp_write_addr,
	.epp_read_addr	= parport_ieee1284_epp_read_addr,

	.ecp_write_data	= parport_ieee1284_ecp_write_data,
	.ecp_read_data	= parport_ieee1284_ecp_read_data,
	.ecp_write_addr	= parport_ieee1284_ecp_write_addr,

	.compat_write_data	= parport_ieee1284_write_compat,
	.nibble_read_data	= parport_ieee1284_read_nibble,
	.byte_read_data		= parport_ieee1284_read_byte,

	.owner		= THIS_MODULE,
};

static int bpp_probe(struct platform_device *op)
{
	struct parport_operations *ops;
	struct bpp_regs __iomem *regs;
	int irq, dma, err = 0, size;
	unsigned char value_tcr;
	void __iomem *base;
	struct parport *p;

	irq = op->archdata.irqs[0];
	base = of_ioremap(&op->resource[0], 0,
			  resource_size(&op->resource[0]),
			  "sunbpp");
	if (!base)
		return -ENODEV;

	size = resource_size(&op->resource[0]);
	dma = PARPORT_DMA_NONE;

	ops = kmemdup(&parport_sunbpp_ops, sizeof(struct parport_operations),
		      GFP_KERNEL);
        if (!ops)
		goto out_unmap;

	dprintk(("register_port\n"));
	if (!(p = parport_register_port((unsigned long)base, irq, dma, ops)))
		goto out_free_ops;

	p->size = size;
	p->dev = &op->dev;

	if ((err = request_irq(p->irq, parport_irq_handler,
			       IRQF_SHARED, p->name, p)) != 0) {
		goto out_put_port;
	}

	parport_sunbpp_enable_irq(p);

	regs = (struct bpp_regs __iomem *)p->base;

	value_tcr = sbus_readb(&regs->p_tcr);
	value_tcr &= ~P_TCR_DIR;
	sbus_writeb(value_tcr, &regs->p_tcr);

	printk(KERN_INFO "%s: sunbpp at 0x%lx\n", p->name, p->base);

	dev_set_drvdata(&op->dev, p);

	parport_announce_port(p);

	return 0;

out_put_port:
	parport_put_port(p);

out_free_ops:
	kfree(ops);

out_unmap:
	of_iounmap(&op->resource[0], base, size);

	return err;
}

static int bpp_remove(struct platform_device *op)
{
	struct parport *p = dev_get_drvdata(&op->dev);
	struct parport_operations *ops = p->ops;

	parport_remove_port(p);

	if (p->irq != PARPORT_IRQ_NONE) {
		parport_sunbpp_disable_irq(p);
		free_irq(p->irq, p);
	}

	of_iounmap(&op->resource[0], (void __iomem *) p->base, p->size);
	parport_put_port(p);
	kfree(ops);

	dev_set_drvdata(&op->dev, NULL);

	return 0;
}

static const struct of_device_id bpp_match[] = {
	{
		.name = "SUNW,bpp",
	},
	{},
};

MODULE_DEVICE_TABLE(of, bpp_match);

static struct platform_driver bpp_sbus_driver = {
	.driver = {
		.name = "bpp",
		.owner = THIS_MODULE,
		.of_match_table = bpp_match,
	},
	.probe		= bpp_probe,
	.remove		= bpp_remove,
};

module_platform_driver(bpp_sbus_driver);

MODULE_AUTHOR("Derrick J Brashear");
MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port");
MODULE_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port");
MODULE_VERSION("2.0");
MODULE_LICENSE("GPL");
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>
27167e0e DM	29	#include <linux/of.h>
27167e0e DM	30	#include <linux/of_device.h>
1da177e4 LT	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> /* OpenProm Library */
1da177e4 LT	39	#include <asm/dma.h> /* BPP uses LSI 64854 for DMA */
	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
1da177e4 LT	50	static 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(&regs->p_csr);
	56	tmp &= ~DMA_INT_ENAB;
	57	sbus_writel(tmp, &regs->p_csr);
	58	}
	59
	60	static 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(&regs->p_csr);
	66	tmp \|= DMA_INT_ENAB;
	67	sbus_writel(tmp, &regs->p_csr);
	68	}
	69
	70	static 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, &regs->p_dr);
	75	dprintk((KERN_DEBUG "wrote 0x%x\n", d));
	76	}
	77
	78	static 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(&regs->p_dr);
	83	}
	84
1da177e4 LT	85	static 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(&regs->p_tcr);
	90	unsigned char value_ir = sbus_readb(&regs->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
5a68b2e3	103	dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", value_tcr, value_ir));
1da177e4 LT	104	dprintk((KERN_DEBUG "read status 0x%x\n", bits));
	105	return bits;
	106	}
	107
	108	static 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(&regs->p_tcr);
	113	unsigned char value_or = sbus_readb(&regs->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
5a68b2e3	124	dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", value_tcr, value_or));
1da177e4 LT	125	dprintk((KERN_DEBUG "read control 0x%x\n", bits));
	126	return bits;
	127	}
	128
	129	static unsigned char parport_sunbpp_read_control(struct parport *p)
	130	{
	131	return control_sunbpp_to_pc(p);
	132	}
	133
	134	static 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(&regs->p_tcr);
	140	unsigned char value_or = sbus_readb(&regs->p_or);
	141
5a68b2e3 DM	142	dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n",
5a68b2e3 DM	143	value_tcr, value_or));
1da177e4 LT	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, &regs->p_or);
	174	sbus_writeb(value_tcr, &regs->p_tcr);
5a68b2e3 DM	175	dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n",
5a68b2e3 DM	176	value_tcr, value_or));
1da177e4 LT	177	return parport_sunbpp_read_control(p);
	178	}
	179
	180	static 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
	190	static unsigned char parport_sunbpp_read_status(struct parport *p)
	191	{
	192	return status_sunbpp_to_pc(p);
	193	}
	194
	195	static 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(&regs->p_tcr);
	199
	200	dprintk((KERN_DEBUG "forward\n"));
	201	value_tcr &= ~P_TCR_DIR;
	202	sbus_writeb(value_tcr, &regs->p_tcr);
	203	}
	204
	205	static 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(&regs->p_tcr);
	209
	210	dprintk((KERN_DEBUG "reverse\n"));
	211	val \|= P_TCR_DIR;
	212	sbus_writeb(val, &regs->p_tcr);
	213	}
	214
	215	static 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
	221	static 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
	226	static 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
	231	static 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
312facaf	268	static int bpp_probe(struct platform_device *op)
1da177e4	269	{
1da177e4	270	struct parport_operations *ops;
1da177e4	271	struct bpp_regs __iomem *regs;
27167e0e	272	int irq, dma, err = 0, size;
1da177e4	273	unsigned char value_tcr;
27167e0e DM	274	void __iomem *base;
27167e0e DM	275	struct parport *p;
1da177e4	276
1636f8ac	277	irq = op->archdata.irqs[0];
27167e0e DM	278	base = of_ioremap(&op->resource[0], 0,
	279	resource_size(&op->resource[0]),
	280	"sunbpp");
1da177e4	281	if (!base)
4f62d158	282	return -ENODEV;
1da177e4	283
27167e0e	284	size = resource_size(&op->resource[0]);
1da177e4 LT	285	dma = PARPORT_DMA_NONE;
1da177e4 LT	286
2451a848 SMP	287	ops = kmemdup(&parport_sunbpp_ops, sizeof(struct parport_operations),
2451a848 SMP	288	GFP_KERNEL);
1da177e4	289	if (!ops)
4f62d158	290	goto out_unmap;
1da177e4	291
1da177e4 LT	292	dprintk(("register_port\n"));
1da177e4 LT	293	if (!(p = parport_register_port((unsigned long)base, irq, dma, ops)))
4f62d158	294	goto out_free_ops;
1da177e4 LT	295
1da177e4 LT	296	p->size = size;
27167e0e	297	p->dev = &op->dev;
1da177e4	298
3f2e40df	299	if ((err = request_irq(p->irq, parport_irq_handler,
dace1453	300	IRQF_SHARED, p->name, p)) != 0) {
4f62d158	301	goto out_put_port;
1da177e4	302	}
4f62d158	303
1da177e4 LT	304	parport_sunbpp_enable_irq(p);
	305
	306	regs = (struct bpp_regs __iomem *)p->base;
4f62d158	307
1da177e4 LT	308	value_tcr = sbus_readb(&regs->p_tcr);
	309	value_tcr &= ~P_TCR_DIR;
	310	sbus_writeb(value_tcr, &regs->p_tcr);
	311
	312	printk(KERN_INFO "%s: sunbpp at 0x%lx\n", p->name, p->base);
1da177e4	313
27167e0e	314	dev_set_drvdata(&op->dev, p);
4f62d158 DM	315
	316	parport_announce_port(p);
	317
	318	return 0;
1da177e4	319
4f62d158	320	out_put_port:
1da177e4	321	parport_put_port(p);
4f62d158 DM	322
4f62d158 DM	323	out_free_ops:
1da177e4	324	kfree(ops);
4f62d158 DM	325
4f62d158 DM	326	out_unmap:
27167e0e	327	of_iounmap(&op->resource[0], base, size);
4f62d158	328
1da177e4 LT	329	return err;
	330	}
	331
312facaf	332	static int bpp_remove(struct platform_device *op)
4f62d158	333	{
27167e0e	334	struct parport *p = dev_get_drvdata(&op->dev);
4f62d158 DM	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);
1da177e4	342	}
4f62d158	343
27167e0e	344	of_iounmap(&op->resource[0], (void __iomem *) p->base, p->size);
4f62d158 DM	345	parport_put_port(p);
	346	kfree(ops);
	347
27167e0e	348	dev_set_drvdata(&op->dev, NULL);
4f62d158 DM	349
	350	return 0;
	351	}
	352
fd098316	353	static const struct of_device_id bpp_match[] = {
4f62d158 DM	354	{
	355	.name = "SUNW,bpp",
	356	},
	357	{},
	358	};
	359
09ec4314	360	MODULE_DEVICE_TABLE(of, bpp_match);
4f62d158	361
4ebb24f7	362	static struct platform_driver bpp_sbus_driver = {
4018294b GL	363	.driver = {
	364	.name = "bpp",
	365	.owner = THIS_MODULE,
	366	.of_match_table = bpp_match,
	367	},
4f62d158	368	.probe = bpp_probe,
312facaf	369	.remove = bpp_remove,
4f62d158 DM	370	};
4f62d158 DM	371
782ee877	372	module_platform_driver(bpp_sbus_driver);
1da177e4 LT	373
	374	MODULE_AUTHOR("Derrick J Brashear");
	375	MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port");
	376	MODULE_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port");
4f62d158	377	MODULE_VERSION("2.0");
1da177e4	378	MODULE_LICENSE("GPL");