[mirror_ubuntu-bionic-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 irqreturn_t parport_sunbpp_interrupt(int irq, void *dev_id)
{
	parport_generic_irq(irq, (struct parport *) dev_id);
	return IRQ_HANDLED;
}

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_sunbpp_interrupt,
			       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
7d12e780	49	static irqreturn_t parport_sunbpp_interrupt(int irq, void *dev_id)
1da177e4	50	{
0d84438d	51	parport_generic_irq(irq, (struct parport *) dev_id);
1da177e4 LT	52	return IRQ_HANDLED;
	53	}
	54
	55	static void parport_sunbpp_disable_irq(struct parport *p)
	56	{
	57	struct bpp_regs __iomem regs = (struct bpp_regs __iomem )p->base;
	58	u32 tmp;
	59
	60	tmp = sbus_readl(&regs->p_csr);
	61	tmp &= ~DMA_INT_ENAB;
	62	sbus_writel(tmp, &regs->p_csr);
	63	}
	64
	65	static void parport_sunbpp_enable_irq(struct parport *p)
	66	{
	67	struct bpp_regs __iomem regs = (struct bpp_regs __iomem )p->base;
	68	u32 tmp;
	69
	70	tmp = sbus_readl(&regs->p_csr);
	71	tmp \|= DMA_INT_ENAB;
	72	sbus_writel(tmp, &regs->p_csr);
	73	}
	74
	75	static void parport_sunbpp_write_data(struct parport *p, unsigned char d)
	76	{
	77	struct bpp_regs __iomem regs = (struct bpp_regs __iomem )p->base;
	78
	79	sbus_writeb(d, &regs->p_dr);
	80	dprintk((KERN_DEBUG "wrote 0x%x\n", d));
	81	}
	82
	83	static unsigned char parport_sunbpp_read_data(struct parport *p)
	84	{
	85	struct bpp_regs __iomem regs = (struct bpp_regs __iomem )p->base;
	86
	87	return sbus_readb(&regs->p_dr);
	88	}
	89
	90	#if 0
	91	static void control_pc_to_sunbpp(struct parport *p, unsigned char status)
	92	{
	93	struct bpp_regs __iomem regs = (struct bpp_regs __iomem )p->base;
	94	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
	95	unsigned char value_or = sbus_readb(&regs->p_or);
	96
	97	if (status & PARPORT_CONTROL_STROBE)
	98	value_tcr \|= P_TCR_DS;
	99	if (status & PARPORT_CONTROL_AUTOFD)
	100	value_or \|= P_OR_AFXN;
	101	if (status & PARPORT_CONTROL_INIT)
	102	value_or \|= P_OR_INIT;
	103	if (status & PARPORT_CONTROL_SELECT)
	104	value_or \|= P_OR_SLCT_IN;
	105
	106	sbus_writeb(value_or, &regs->p_or);
	107	sbus_writeb(value_tcr, &regs->p_tcr);
	108	}
	109	#endif
	110
	111	static unsigned char status_sunbpp_to_pc(struct parport *p)
	112	{
	113	struct bpp_regs __iomem regs = (struct bpp_regs __iomem )p->base;
	114	unsigned char bits = 0;
	115	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
116	unsigned char value_ir = sbus_readb(&regs->p_ir);
117
118	if (!(value_ir & P_IR_ERR))
119	bits \|= PARPORT_STATUS_ERROR;
120	if (!(value_ir & P_IR_SLCT))
121	bits \|= PARPORT_STATUS_SELECT;
122	if (!(value_ir & P_IR_PE))
123	bits \|= PARPORT_STATUS_PAPEROUT;
124	if (value_tcr & P_TCR_ACK)
125	bits \|= PARPORT_STATUS_ACK;
126	if (!(value_tcr & P_TCR_BUSY))
127	bits \|= PARPORT_STATUS_BUSY;
128
5a68b2e3	129	dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", value_tcr, value_ir));
1da177e4 LT	130	dprintk((KERN_DEBUG "read status 0x%x\n", bits));
	131	return bits;
	132	}
	133
	134	static unsigned char control_sunbpp_to_pc(struct parport *p)
	135	{
	136	struct bpp_regs __iomem regs = (struct bpp_regs __iomem )p->base;
	137	unsigned char bits = 0;
	138	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
	139	unsigned char value_or = sbus_readb(&regs->p_or);
	140
	141	if (!(value_tcr & P_TCR_DS))
	142	bits \|= PARPORT_CONTROL_STROBE;
	143	if (!(value_or & P_OR_AFXN))
	144	bits \|= PARPORT_CONTROL_AUTOFD;
	145	if (!(value_or & P_OR_INIT))
	146	bits \|= PARPORT_CONTROL_INIT;
	147	if (value_or & P_OR_SLCT_IN)
	148	bits \|= PARPORT_CONTROL_SELECT;
	149
5a68b2e3	150	dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", value_tcr, value_or));
1da177e4 LT	151	dprintk((KERN_DEBUG "read control 0x%x\n", bits));
	152	return bits;
	153	}
	154
	155	static unsigned char parport_sunbpp_read_control(struct parport *p)
	156	{
	157	return control_sunbpp_to_pc(p);
	158	}
	159
	160	static unsigned char parport_sunbpp_frob_control(struct parport *p,
	161	unsigned char mask,
	162	unsigned char val)
	163	{
	164	struct bpp_regs __iomem regs = (struct bpp_regs __iomem )p->base;
	165	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
	166	unsigned char value_or = sbus_readb(&regs->p_or);
	167
5a68b2e3 DM	168	dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n",
5a68b2e3 DM	169	value_tcr, value_or));
1da177e4 LT	170	if (mask & PARPORT_CONTROL_STROBE) {
	171	if (val & PARPORT_CONTROL_STROBE) {
	172	value_tcr &= ~P_TCR_DS;
	173	} else {
	174	value_tcr \|= P_TCR_DS;
	175	}
	176	}
	177	if (mask & PARPORT_CONTROL_AUTOFD) {
	178	if (val & PARPORT_CONTROL_AUTOFD) {
	179	value_or &= ~P_OR_AFXN;
	180	} else {
	181	value_or \|= P_OR_AFXN;
	182	}
	183	}
	184	if (mask & PARPORT_CONTROL_INIT) {
	185	if (val & PARPORT_CONTROL_INIT) {
	186	value_or &= ~P_OR_INIT;
	187	} else {
	188	value_or \|= P_OR_INIT;
	189	}
	190	}
	191	if (mask & PARPORT_CONTROL_SELECT) {
	192	if (val & PARPORT_CONTROL_SELECT) {
	193	value_or \|= P_OR_SLCT_IN;
	194	} else {
	195	value_or &= ~P_OR_SLCT_IN;
	196	}
	197	}
	198
	199	sbus_writeb(value_or, &regs->p_or);
	200	sbus_writeb(value_tcr, &regs->p_tcr);
5a68b2e3 DM	201	dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n",
5a68b2e3 DM	202	value_tcr, value_or));
1da177e4 LT	203	return parport_sunbpp_read_control(p);
	204	}
	205
	206	static void parport_sunbpp_write_control(struct parport *p, unsigned char d)
	207	{
	208	const unsigned char wm = (PARPORT_CONTROL_STROBE \|
	209	PARPORT_CONTROL_AUTOFD \|
	210	PARPORT_CONTROL_INIT \|
	211	PARPORT_CONTROL_SELECT);
	212
	213	parport_sunbpp_frob_control (p, wm, d & wm);
	214	}
	215
	216	static unsigned char parport_sunbpp_read_status(struct parport *p)
	217	{
	218	return status_sunbpp_to_pc(p);
	219	}
	220
	221	static void parport_sunbpp_data_forward (struct parport *p)
	222	{
	223	struct bpp_regs __iomem regs = (struct bpp_regs __iomem )p->base;
	224	unsigned char value_tcr = sbus_readb(&regs->p_tcr);
	225
	226	dprintk((KERN_DEBUG "forward\n"));
	227	value_tcr &= ~P_TCR_DIR;
	228	sbus_writeb(value_tcr, &regs->p_tcr);
	229	}
	230
	231	static void parport_sunbpp_data_reverse (struct parport *p)
	232	{
	233	struct bpp_regs __iomem regs = (struct bpp_regs __iomem )p->base;
	234	u8 val = sbus_readb(&regs->p_tcr);
	235
	236	dprintk((KERN_DEBUG "reverse\n"));
	237	val \|= P_TCR_DIR;
	238	sbus_writeb(val, &regs->p_tcr);
	239	}
	240
	241	static void parport_sunbpp_init_state(struct pardevice dev, struct parport_state s)
	242	{
	243	s->u.pc.ctr = 0xc;
	244	s->u.pc.ecr = 0x0;
	245	}
	246
	247	static void parport_sunbpp_save_state(struct parport p, struct parport_state s)
	248	{
	249	s->u.pc.ctr = parport_sunbpp_read_control(p);
	250	}
	251
	252	static void parport_sunbpp_restore_state(struct parport p, struct parport_state s)
	253	{
	254	parport_sunbpp_write_control(p, s->u.pc.ctr);
	255	}
	256
	257	static struct parport_operations parport_sunbpp_ops =
	258	{
	259	.write_data = parport_sunbpp_write_data,
	260	.read_data = parport_sunbpp_read_data,
	261
	262	.write_control = parport_sunbpp_write_control,
	263	.read_control = parport_sunbpp_read_control,
	264	.frob_control = parport_sunbpp_frob_control,
	265
	266	.read_status = parport_sunbpp_read_status,
267
268	.enable_irq = parport_sunbpp_enable_irq,
269	.disable_irq = parport_sunbpp_disable_irq,
270
271	.data_forward = parport_sunbpp_data_forward,
272	.data_reverse = parport_sunbpp_data_reverse,
273
274	.init_state = parport_sunbpp_init_state,
275	.save_state = parport_sunbpp_save_state,
276	.restore_state = parport_sunbpp_restore_state,
277
278	.epp_write_data = parport_ieee1284_epp_write_data,
279	.epp_read_data = parport_ieee1284_epp_read_data,
280	.epp_write_addr = parport_ieee1284_epp_write_addr,
281	.epp_read_addr = parport_ieee1284_epp_read_addr,
282
283	.ecp_write_data = parport_ieee1284_ecp_write_data,
284	.ecp_read_data = parport_ieee1284_ecp_read_data,
285	.ecp_write_addr = parport_ieee1284_ecp_write_addr,
286
287	.compat_write_data = parport_ieee1284_write_compat,
288	.nibble_read_data = parport_ieee1284_read_nibble,
289	.byte_read_data = parport_ieee1284_read_byte,
290
291	.owner = THIS_MODULE,
292	};
293
4f62d158	294	static int __devinit init_one_port(struct sbus_dev *sdev)
1da177e4 LT	295	{
	296	struct parport *p;
	297	/* at least in theory there may be a "we don't dma" case */
	298	struct parport_operations *ops;
	299	void __iomem *base;
	300	int irq, dma, err = 0, size;
	301	struct bpp_regs __iomem *regs;
	302	unsigned char value_tcr;
1da177e4 LT	303
	304	irq = sdev->irqs[0];
	305	base = sbus_ioremap(&sdev->resource[0], 0,
	306	sdev->reg_addrs[0].reg_size,
	307	"sunbpp");
	308	if (!base)
4f62d158	309	return -ENODEV;
1da177e4 LT	310
	311	size = sdev->reg_addrs[0].reg_size;
	312	dma = PARPORT_DMA_NONE;
	313
4f62d158	314	ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
1da177e4	315	if (!ops)
4f62d158	316	goto out_unmap;
1da177e4 LT	317
	318	memcpy (ops, &parport_sunbpp_ops, sizeof (struct parport_operations));
	319
	320	dprintk(("register_port\n"));
	321	if (!(p = parport_register_port((unsigned long)base, irq, dma, ops)))
4f62d158	322	goto out_free_ops;
1da177e4 LT	323
1da177e4 LT	324	p->size = size;
c15a3837	325	p->dev = &sdev->ofdev.dev;
1da177e4	326
1da177e4	327	if ((err = request_irq(p->irq, parport_sunbpp_interrupt,
dace1453	328	IRQF_SHARED, p->name, p)) != 0) {
4f62d158	329	goto out_put_port;
1da177e4	330	}
4f62d158	331
1da177e4 LT	332	parport_sunbpp_enable_irq(p);
	333
	334	regs = (struct bpp_regs __iomem *)p->base;
4f62d158	335
1da177e4 LT	336	value_tcr = sbus_readb(&regs->p_tcr);
	337	value_tcr &= ~P_TCR_DIR;
	338	sbus_writeb(value_tcr, &regs->p_tcr);
	339
	340	printk(KERN_INFO "%s: sunbpp at 0x%lx\n", p->name, p->base);
1da177e4	341
4f62d158 DM	342	dev_set_drvdata(&sdev->ofdev.dev, p);
	343
	344	parport_announce_port(p);
	345
	346	return 0;
1da177e4	347
4f62d158	348	out_put_port:
1da177e4	349	parport_put_port(p);
4f62d158 DM	350
4f62d158 DM	351	out_free_ops:
1da177e4	352	kfree(ops);
4f62d158 DM	353
4f62d158 DM	354	out_unmap:
1da177e4	355	sbus_iounmap(base, size);
4f62d158	356
1da177e4 LT	357	return err;
	358	}
	359
4f62d158	360	static int __devinit bpp_probe(struct of_device dev, const struct of_device_id match)
1da177e4	361	{
4f62d158 DM	362	struct sbus_dev *sdev = to_sbus_device(&dev->dev);
	363
	364	return init_one_port(sdev);
	365	}
	366
	367	static int __devexit bpp_remove(struct of_device *dev)
	368	{
	369	struct parport *p = dev_get_drvdata(&dev->dev);
	370	struct parport_operations *ops = p->ops;
	371
	372	parport_remove_port(p);
	373
	374	if (p->irq != PARPORT_IRQ_NONE) {
	375	parport_sunbpp_disable_irq(p);
	376	free_irq(p->irq, p);
1da177e4	377	}
4f62d158 DM	378
	379	sbus_iounmap((void __iomem *) p->base, p->size);
	380	parport_put_port(p);
	381	kfree(ops);
	382
	383	dev_set_drvdata(&dev->dev, NULL);
	384
	385	return 0;
	386	}
	387
	388	static struct of_device_id bpp_match[] = {
	389	{
	390	.name = "SUNW,bpp",
	391	},
	392	{},
	393	};
	394
09ec4314	395	MODULE_DEVICE_TABLE(of, bpp_match);
4f62d158 DM	396
	397	static struct of_platform_driver bpp_sbus_driver = {
	398	.name = "bpp",
	399	.match_table = bpp_match,
	400	.probe = bpp_probe,
	401	.remove = __devexit_p(bpp_remove),
	402	};
	403
	404	static int __init parport_sunbpp_init(void)
	405	{
	406	return of_register_driver(&bpp_sbus_driver, &sbus_bus_type);
1da177e4 LT	407	}
	408
	409	static void __exit parport_sunbpp_exit(void)
	410	{
4f62d158	411	of_unregister_driver(&bpp_sbus_driver);
1da177e4 LT	412	}
	413
	414	MODULE_AUTHOR("Derrick J Brashear");
	415	MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port");
	416	MODULE_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port");
4f62d158	417	MODULE_VERSION("2.0");
1da177e4 LT	418	MODULE_LICENSE("GPL");
	419
	420	module_init(parport_sunbpp_init)
	421	module_exit(parport_sunbpp_exit)