[net-next-2.6.git] / arch / sparc / include / asm / parport.h

/* parport.h: sparc64 specific parport initialization and dma.
 *
 * Copyright (C) 1999  Eddie C. Dost  (ecd@skynet.be)
 */

#ifndef _ASM_SPARC64_PARPORT_H
#define _ASM_SPARC64_PARPORT_H 1

#include <linux/of_device.h>

#include <asm/ebus_dma.h>
#include <asm/ns87303.h>
#include <asm/prom.h>

#define PARPORT_PC_MAX_PORTS	PARPORT_MAX

/*
 * While sparc64 doesn't have an ISA DMA API, we provide something that looks
 * close enough to make parport_pc happy
 */
#define HAS_DMA

static DEFINE_SPINLOCK(dma_spin_lock);

#define claim_dma_lock() \
({	unsigned long flags; \
	spin_lock_irqsave(&dma_spin_lock, flags); \
	flags; \
})

#define release_dma_lock(__flags) \
	spin_unlock_irqrestore(&dma_spin_lock, __flags);

static struct sparc_ebus_info {
	struct ebus_dma_info info;
	unsigned int addr;
	unsigned int count;
	int lock;

	struct parport *port;
} sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];

static DECLARE_BITMAP(dma_slot_map, PARPORT_PC_MAX_PORTS);

static inline int request_dma(unsigned int dmanr, const char *device_id)
{
	if (dmanr >= PARPORT_PC_MAX_PORTS)
		return -EINVAL;
	if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0)
		return -EBUSY;
	return 0;
}

static inline void free_dma(unsigned int dmanr)
{
	if (dmanr >= PARPORT_PC_MAX_PORTS) {
		printk(KERN_WARNING "Trying to free DMA%d\n", dmanr);
		return;
	}
	if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) {
		printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr);
		return;
	}
}

static inline void enable_dma(unsigned int dmanr)
{
	ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);

	if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
			     sparc_ebus_dmas[dmanr].addr,
			     sparc_ebus_dmas[dmanr].count))
		BUG();
}

static inline void disable_dma(unsigned int dmanr)
{
	ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
}

static inline void clear_dma_ff(unsigned int dmanr)
{
	/* nothing */
}

static inline void set_dma_mode(unsigned int dmanr, char mode)
{
	ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
}

static inline void set_dma_addr(unsigned int dmanr, unsigned int addr)
{
	sparc_ebus_dmas[dmanr].addr = addr;
}

static inline void set_dma_count(unsigned int dmanr, unsigned int count)
{
	sparc_ebus_dmas[dmanr].count = count;
}

static inline unsigned int get_dma_residue(unsigned int dmanr)
{
	return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
}

static int __devinit ecpp_probe(struct of_device *op, const struct of_device_id *match)
{
	unsigned long base = op->resource[0].start;
	unsigned long config = op->resource[1].start;
	unsigned long d_base = op->resource[2].start;
	unsigned long d_len;
	struct device_node *parent;
	struct parport *p;
	int slot, err;

	parent = op->dev.of_node->parent;
	if (!strcmp(parent->name, "dma")) {
		p = parport_pc_probe_port(base, base + 0x400,
					  op->irqs[0], PARPORT_DMA_NOFIFO,
					  op->dev.parent->parent, 0);
		if (!p)
			return -ENOMEM;
		dev_set_drvdata(&op->dev, p);
		return 0;
	}

	for (slot = 0; slot < PARPORT_PC_MAX_PORTS; slot++) {
		if (!test_and_set_bit(slot, dma_slot_map))
			break;
	}
	err = -ENODEV;
	if (slot >= PARPORT_PC_MAX_PORTS)
		goto out_err;

	spin_lock_init(&sparc_ebus_dmas[slot].info.lock);

	d_len = (op->resource[2].end - d_base) + 1UL;
	sparc_ebus_dmas[slot].info.regs =
		of_ioremap(&op->resource[2], 0, d_len, "ECPP DMA");

	if (!sparc_ebus_dmas[slot].info.regs)
		goto out_clear_map;

	sparc_ebus_dmas[slot].info.flags = 0;
	sparc_ebus_dmas[slot].info.callback = NULL;
	sparc_ebus_dmas[slot].info.client_cookie = NULL;
	sparc_ebus_dmas[slot].info.irq = 0xdeadbeef;
	strcpy(sparc_ebus_dmas[slot].info.name, "parport");
	if (ebus_dma_register(&sparc_ebus_dmas[slot].info))
		goto out_unmap_regs;

	ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 1);

	/* Configure IRQ to Push Pull, Level Low */
	/* Enable ECP, set bit 2 of the CTR first */
	outb(0x04, base + 0x02);
	ns87303_modify(config, PCR,
		       PCR_EPP_ENABLE |
		       PCR_IRQ_ODRAIN,
		       PCR_ECP_ENABLE |
		       PCR_ECP_CLK_ENA |
		       PCR_IRQ_POLAR);

	/* CTR bit 5 controls direction of port */
	ns87303_modify(config, PTR,
		       0, PTR_LPT_REG_DIR);

	p = parport_pc_probe_port(base, base + 0x400,
				  op->irqs[0],
				  slot,
				  op->dev.parent,
				  0);
	err = -ENOMEM;
	if (!p)
		goto out_disable_irq;

	dev_set_drvdata(&op->dev, p);

	return 0;

out_disable_irq:
	ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
	ebus_dma_unregister(&sparc_ebus_dmas[slot].info);

out_unmap_regs:
	of_iounmap(&op->resource[2], sparc_ebus_dmas[slot].info.regs, d_len);

out_clear_map:
	clear_bit(slot, dma_slot_map);

out_err:
	return err;
}

static int __devexit ecpp_remove(struct of_device *op)
{
	struct parport *p = dev_get_drvdata(&op->dev);
	int slot = p->dma;

	parport_pc_unregister_port(p);

	if (slot != PARPORT_DMA_NOFIFO) {
		unsigned long d_base = op->resource[2].start;
		unsigned long d_len;

		d_len = (op->resource[2].end - d_base) + 1UL;

		ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
		ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
		of_iounmap(&op->resource[2],
			   sparc_ebus_dmas[slot].info.regs,
			   d_len);
		clear_bit(slot, dma_slot_map);
	}

	return 0;
}

static const struct of_device_id ecpp_match[] = {
	{
		.name = "ecpp",
	},
	{
		.name = "parallel",
		.compatible = "ecpp",
	},
	{
		.name = "parallel",
		.compatible = "ns87317-ecpp",
	},
	{},
};

static struct of_platform_driver ecpp_driver = {
	.name			= "ecpp",
	.match_table		= ecpp_match,
	.probe			= ecpp_probe,
	.remove			= __devexit_p(ecpp_remove),
};

static int parport_pc_find_nonpci_ports(int autoirq, int autodma)
{
	of_register_driver(&ecpp_driver, &of_bus_type);

	return 0;
}

#endif /* !(_ASM_SPARC64_PARPORT_H */
Commit	Line	Data
a00736e9 SR	1	/* parport.h: sparc64 specific parport initialization and dma.
	2	*
	3	* Copyright (C) 1999 Eddie C. Dost (ecd@skynet.be)
	4	*/
	5
	6	#ifndef _ASM_SPARC64_PARPORT_H
	7	#define _ASM_SPARC64_PARPORT_H 1
	8
764f2579 SR	9	#include <linux/of_device.h>
764f2579 SR	10
aae7fb87	11	#include <asm/ebus_dma.h>
a00736e9	12	#include <asm/ns87303.h>
a00736e9 SR	13	#include <asm/prom.h>
	14
	15	#define PARPORT_PC_MAX_PORTS PARPORT_MAX
	16
	17	/*
	18	* While sparc64 doesn't have an ISA DMA API, we provide something that looks
	19	* close enough to make parport_pc happy
	20	*/
	21	#define HAS_DMA
	22
	23	static DEFINE_SPINLOCK(dma_spin_lock);
	24
	25	#define claim_dma_lock() \
	26	({ unsigned long flags; \
	27	spin_lock_irqsave(&dma_spin_lock, flags); \
	28	flags; \
	29	})
	30
	31	#define release_dma_lock(__flags) \
	32	spin_unlock_irqrestore(&dma_spin_lock, __flags);
	33
	34	static struct sparc_ebus_info {
	35	struct ebus_dma_info info;
	36	unsigned int addr;
	37	unsigned int count;
	38	int lock;
	39
	40	struct parport *port;
	41	} sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
	42
	43	static DECLARE_BITMAP(dma_slot_map, PARPORT_PC_MAX_PORTS);
	44
	45	static inline int request_dma(unsigned int dmanr, const char *device_id)
	46	{
	47	if (dmanr >= PARPORT_PC_MAX_PORTS)
	48	return -EINVAL;
	49	if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0)
	50	return -EBUSY;
	51	return 0;
	52	}
	53
	54	static inline void free_dma(unsigned int dmanr)
	55	{
	56	if (dmanr >= PARPORT_PC_MAX_PORTS) {
	57	printk(KERN_WARNING "Trying to free DMA%d\n", dmanr);
	58	return;
	59	}
	60	if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) {
	61	printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr);
	62	return;
	63	}
	64	}
	65
	66	static inline void enable_dma(unsigned int dmanr)
	67	{
	68	ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
	69
	70	if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
	71	sparc_ebus_dmas[dmanr].addr,
	72	sparc_ebus_dmas[dmanr].count))
	73	BUG();
	74	}
	75
	76	static inline void disable_dma(unsigned int dmanr)
77	{
78	ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
79	}
80
81	static inline void clear_dma_ff(unsigned int dmanr)
82	{
83	/* nothing */
84	}
85
86	static inline void set_dma_mode(unsigned int dmanr, char mode)
87	{
88	ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
89	}
90
91	static inline void set_dma_addr(unsigned int dmanr, unsigned int addr)
92	{
93	sparc_ebus_dmas[dmanr].addr = addr;
94	}
95
96	static inline void set_dma_count(unsigned int dmanr, unsigned int count)
97	{
98	sparc_ebus_dmas[dmanr].count = count;
99	}
100
101	static inline unsigned int get_dma_residue(unsigned int dmanr)
102	{
103	return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
104	}
105
106	static int __devinit ecpp_probe(struct of_device op, const struct of_device_id match)
107	{
108	unsigned long base = op->resource[0].start;
109	unsigned long config = op->resource[1].start;
110	unsigned long d_base = op->resource[2].start;
111	unsigned long d_len;
112	struct device_node *parent;
113	struct parport *p;
114	int slot, err;
115
61c7a080	116	parent = op->dev.of_node->parent;
a00736e9 SR	117	if (!strcmp(parent->name, "dma")) {
	118	p = parport_pc_probe_port(base, base + 0x400,
	119	op->irqs[0], PARPORT_DMA_NOFIFO,
28783eb5	120	op->dev.parent->parent, 0);
a00736e9 SR	121	if (!p)
	122	return -ENOMEM;
	123	dev_set_drvdata(&op->dev, p);
	124	return 0;
	125	}
	126
	127	for (slot = 0; slot < PARPORT_PC_MAX_PORTS; slot++) {
	128	if (!test_and_set_bit(slot, dma_slot_map))
	129	break;
	130	}
	131	err = -ENODEV;
	132	if (slot >= PARPORT_PC_MAX_PORTS)
	133	goto out_err;
	134
	135	spin_lock_init(&sparc_ebus_dmas[slot].info.lock);
	136
	137	d_len = (op->resource[2].end - d_base) + 1UL;
	138	sparc_ebus_dmas[slot].info.regs =
	139	of_ioremap(&op->resource[2], 0, d_len, "ECPP DMA");
	140
	141	if (!sparc_ebus_dmas[slot].info.regs)
	142	goto out_clear_map;
	143
	144	sparc_ebus_dmas[slot].info.flags = 0;
	145	sparc_ebus_dmas[slot].info.callback = NULL;
	146	sparc_ebus_dmas[slot].info.client_cookie = NULL;
	147	sparc_ebus_dmas[slot].info.irq = 0xdeadbeef;
	148	strcpy(sparc_ebus_dmas[slot].info.name, "parport");
	149	if (ebus_dma_register(&sparc_ebus_dmas[slot].info))
	150	goto out_unmap_regs;
	151
	152	ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 1);
	153
	154	/* Configure IRQ to Push Pull, Level Low */
	155	/* Enable ECP, set bit 2 of the CTR first */
	156	outb(0x04, base + 0x02);
	157	ns87303_modify(config, PCR,
	158	PCR_EPP_ENABLE \|
	159	PCR_IRQ_ODRAIN,
	160	PCR_ECP_ENABLE \|
	161	PCR_ECP_CLK_ENA \|
	162	PCR_IRQ_POLAR);
	163
	164	/* CTR bit 5 controls direction of port */
	165	ns87303_modify(config, PTR,
	166	0, PTR_LPT_REG_DIR);
	167
	168	p = parport_pc_probe_port(base, base + 0x400,
	169	op->irqs[0],
	170	slot,
28783eb5 AC	171	op->dev.parent,
28783eb5 AC	172	0);
a00736e9 SR	173	err = -ENOMEM;
	174	if (!p)
	175	goto out_disable_irq;
	176
	177	dev_set_drvdata(&op->dev, p);
	178
	179	return 0;
	180
	181	out_disable_irq:
	182	ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
	183	ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
	184
	185	out_unmap_regs:
	186	of_iounmap(&op->resource[2], sparc_ebus_dmas[slot].info.regs, d_len);
	187
	188	out_clear_map:
	189	clear_bit(slot, dma_slot_map);
	190
	191	out_err:
	192	return err;
	193	}
	194
	195	static int __devexit ecpp_remove(struct of_device *op)
	196	{
	197	struct parport *p = dev_get_drvdata(&op->dev);
	198	int slot = p->dma;
	199
	200	parport_pc_unregister_port(p);
	201
	202	if (slot != PARPORT_DMA_NOFIFO) {
	203	unsigned long d_base = op->resource[2].start;
	204	unsigned long d_len;
	205
	206	d_len = (op->resource[2].end - d_base) + 1UL;
	207
	208	ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
	209	ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
	210	of_iounmap(&op->resource[2],
	211	sparc_ebus_dmas[slot].info.regs,
	212	d_len);
	213	clear_bit(slot, dma_slot_map);
	214	}
	215
	216	return 0;
	217	}
	218
fd098316	219	static const struct of_device_id ecpp_match[] = {
a00736e9 SR	220	{
	221	.name = "ecpp",
	222	},
	223	{
	224	.name = "parallel",
	225	.compatible = "ecpp",
	226	},
	227	{
	228	.name = "parallel",
	229	.compatible = "ns87317-ecpp",
	230	},
	231	{},
	232	};
	233
	234	static struct of_platform_driver ecpp_driver = {
	235	.name = "ecpp",
	236	.match_table = ecpp_match,
	237	.probe = ecpp_probe,
	238	.remove = __devexit_p(ecpp_remove),
	239	};
	240
	241	static int parport_pc_find_nonpci_ports(int autoirq, int autodma)
	242	{
	243	of_register_driver(&ecpp_driver, &of_bus_type);
	244
	245	return 0;
	246	}
	247
	248	#endif /* !(_ASM_SPARC64_PARPORT_H */