[mirror_ubuntu-artful-kernel.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/parport.h>

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

#include <asm/io.h>
#include <asm/oplib.h>           /* OpenProm Library */
#include <asm/sbus.h>
#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);
}

#if 0
static void control_pc_to_sunbpp(struct parport *p, unsigned char status)
{
	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);

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

	sbus_writeb(value_or, &regs->p_or);
	sbus_writeb(value_tcr, &regs->p_tcr);
}
#endif

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 __devinit init_one_port(struct sbus_dev *sdev)
{
	struct parport *p;
	/* at least in theory there may be a "we don't dma" case */
	struct parport_operations *ops;
	void __iomem *base;
	int irq, dma, err = 0, size;
	struct bpp_regs __iomem *regs;
	unsigned char value_tcr;

	irq = sdev->irqs[0];
	base = sbus_ioremap(&sdev->resource[0], 0,
			    sdev->reg_addrs[0].reg_size, 
			    "sunbpp");
	if (!base)
		return -ENODEV;

	size = sdev->reg_addrs[0].reg_size;
	dma = PARPORT_DMA_NONE;

	ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
        if (!ops)
		goto out_unmap;

        memcpy (ops, &parport_sunbpp_ops, sizeof (struct parport_operations));

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

	p->size = size;
	p->dev = &sdev->ofdev.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(&sdev->ofdev.dev, p);

	parport_announce_port(p);

	return 0;

out_put_port:
	parport_put_port(p);

out_free_ops:
	kfree(ops);

out_unmap:
	sbus_iounmap(base, size);

	return err;
}

static int __devinit bpp_probe(struct of_device *dev, const struct of_device_id *match)
{
	struct sbus_dev *sdev = to_sbus_device(&dev->dev);

	return init_one_port(sdev);
}

static int __devexit bpp_remove(struct of_device *dev)
{
	struct parport *p = dev_get_drvdata(&dev->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);
	}

	sbus_iounmap((void __iomem *) p->base, p->size);
	parport_put_port(p);
	kfree(ops);

	dev_set_drvdata(&dev->dev, NULL);

	return 0;
}

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

MODULE_DEVICE_TABLE(of, bpp_match);

static struct of_platform_driver bpp_sbus_driver = {
	.name		= "bpp",
	.match_table	= bpp_match,
	.probe		= bpp_probe,
	.remove		= __devexit_p(bpp_remove),
};

static int __init parport_sunbpp_init(void)
{
	return of_register_driver(&bpp_sbus_driver, &sbus_bus_type);
}

static void __exit parport_sunbpp_exit(void)
{
	of_unregister_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");

module_init(parport_sunbpp_init)
module_exit(parport_sunbpp_exit)
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(&regs->p_csr);
	55	tmp &= ~DMA_INT_ENAB;
	56	sbus_writel(tmp, &regs->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(&regs->p_csr);
	65	tmp \|= DMA_INT_ENAB;
	66	sbus_writel(tmp, &regs->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, &regs->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(&regs->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(&regs->p_tcr);
	89	unsigned char value_or = sbus_readb(&regs->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, &regs->p_or);
	101	sbus_writeb(value_tcr, &regs->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(&regs->p_tcr);
	110	unsigned char value_ir = sbus_readb(&regs->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(&regs->p_tcr);
	133	unsigned char value_or = sbus_readb(&regs->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(&regs->p_tcr);
	160	unsigned char value_or = sbus_readb(&regs->p_or);
	161
5a68b2e3 DM	162	dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n",
5a68b2e3 DM	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, &regs->p_or);
	194	sbus_writeb(value_tcr, &regs->p_tcr);
5a68b2e3 DM	195	dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n",
5a68b2e3 DM	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(&regs->p_tcr);
	219
	220	dprintk((KERN_DEBUG "forward\n"));
	221	value_tcr &= ~P_TCR_DIR;
	222	sbus_writeb(value_tcr, &regs->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(&regs->p_tcr);
	229
	230	dprintk((KERN_DEBUG "reverse\n"));
	231	val \|= P_TCR_DIR;
	232	sbus_writeb(val, &regs->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
1da177e4 LT	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(&regs->p_tcr);
	331	value_tcr &= ~P_TCR_DIR;
	332	sbus_writeb(value_tcr, &regs->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
4f62d158 DM	345	out_free_ops:
1da177e4	346	kfree(ops);
4f62d158 DM	347
4f62d158 DM	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)