[thirdparty/linux.git] / arch / sparc / include / asm / parport.h

/* SPDX-License-Identifier: GPL-2.0 */
/* 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 ecpp_probe(struct platform_device *op)
{
	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->archdata.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->archdata.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 ecpp_remove(struct platform_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",
	},
	{
		.name = "parallel",
		.compatible = "pnpALI,1533,3",
	},
	{},
};

static struct platform_driver ecpp_driver = {
	.driver = {
		.name = "ecpp",
		.of_match_table = ecpp_match,
	},
	.probe			= ecpp_probe,
	.remove			= ecpp_remove,
};

static int parport_pc_find_nonpci_ports(int autoirq, int autodma)
{
	return platform_driver_register(&ecpp_driver);
}

#endif /* !(_ASM_SPARC64_PARPORT_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
a00736e9 SR	2	/* parport.h: sparc64 specific parport initialization and dma.
	3	*
	4	* Copyright (C) 1999 Eddie C. Dost (ecd@skynet.be)
	5	*/
	6
	7	#ifndef _ASM_SPARC64_PARPORT_H
	8	#define _ASM_SPARC64_PARPORT_H 1
	9
764f2579 SR	10	#include <linux/of_device.h>
764f2579 SR	11
aae7fb87	12	#include <asm/ebus_dma.h>
a00736e9	13	#include <asm/ns87303.h>
a00736e9 SR	14	#include <asm/prom.h>
	15
	16	#define PARPORT_PC_MAX_PORTS PARPORT_MAX
	17
	18	/*
	19	* While sparc64 doesn't have an ISA DMA API, we provide something that looks
	20	* close enough to make parport_pc happy
	21	*/
	22	#define HAS_DMA
	23
	24	static DEFINE_SPINLOCK(dma_spin_lock);
	25
	26	#define claim_dma_lock() \
	27	({ unsigned long flags; \
	28	spin_lock_irqsave(&dma_spin_lock, flags); \
	29	flags; \
	30	})
	31
	32	#define release_dma_lock(__flags) \
	33	spin_unlock_irqrestore(&dma_spin_lock, __flags);
	34
	35	static struct sparc_ebus_info {
	36	struct ebus_dma_info info;
	37	unsigned int addr;
	38	unsigned int count;
	39	int lock;
	40
	41	struct parport *port;
	42	} sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
	43
	44	static DECLARE_BITMAP(dma_slot_map, PARPORT_PC_MAX_PORTS);
	45
	46	static inline int request_dma(unsigned int dmanr, const char *device_id)
	47	{
	48	if (dmanr >= PARPORT_PC_MAX_PORTS)
	49	return -EINVAL;
	50	if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0)
	51	return -EBUSY;
	52	return 0;
	53	}
	54
	55	static inline void free_dma(unsigned int dmanr)
	56	{
	57	if (dmanr >= PARPORT_PC_MAX_PORTS) {
	58	printk(KERN_WARNING "Trying to free DMA%d\n", dmanr);
	59	return;
	60	}
	61	if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) {
	62	printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr);
	63	return;
	64	}
	65	}
	66
	67	static inline void enable_dma(unsigned int dmanr)
	68	{
	69	ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
	70
	71	if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
	72	sparc_ebus_dmas[dmanr].addr,
	73	sparc_ebus_dmas[dmanr].count))
	74	BUG();
	75	}
	76
	77	static inline void disable_dma(unsigned int dmanr)
78	{
79	ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
80	}
81
82	static inline void clear_dma_ff(unsigned int dmanr)
83	{
84	/* nothing */
85	}
86
87	static inline void set_dma_mode(unsigned int dmanr, char mode)
88	{
89	ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
90	}
91
92	static inline void set_dma_addr(unsigned int dmanr, unsigned int addr)
93	{
94	sparc_ebus_dmas[dmanr].addr = addr;
95	}
96
97	static inline void set_dma_count(unsigned int dmanr, unsigned int count)
98	{
99	sparc_ebus_dmas[dmanr].count = count;
100	}
101
102	static inline unsigned int get_dma_residue(unsigned int dmanr)
103	{
104	return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
105	}
106
7c9503b8	107	static int ecpp_probe(struct platform_device *op)
a00736e9 SR	108	{
	109	unsigned long base = op->resource[0].start;
	110	unsigned long config = op->resource[1].start;
	111	unsigned long d_base = op->resource[2].start;
	112	unsigned long d_len;
	113	struct device_node *parent;
	114	struct parport *p;
	115	int slot, err;
	116
61c7a080	117	parent = op->dev.of_node->parent;
a00736e9 SR	118	if (!strcmp(parent->name, "dma")) {
a00736e9 SR	119	p = parport_pc_probe_port(base, base + 0x400,
1636f8ac	120	op->archdata.irqs[0], PARPORT_DMA_NOFIFO,
28783eb5	121	op->dev.parent->parent, 0);
a00736e9 SR	122	if (!p)
	123	return -ENOMEM;
	124	dev_set_drvdata(&op->dev, p);
	125	return 0;
	126	}
	127
	128	for (slot = 0; slot < PARPORT_PC_MAX_PORTS; slot++) {
	129	if (!test_and_set_bit(slot, dma_slot_map))
	130	break;
	131	}
	132	err = -ENODEV;
	133	if (slot >= PARPORT_PC_MAX_PORTS)
	134	goto out_err;
	135
	136	spin_lock_init(&sparc_ebus_dmas[slot].info.lock);
	137
	138	d_len = (op->resource[2].end - d_base) + 1UL;
	139	sparc_ebus_dmas[slot].info.regs =
	140	of_ioremap(&op->resource[2], 0, d_len, "ECPP DMA");
	141
	142	if (!sparc_ebus_dmas[slot].info.regs)
	143	goto out_clear_map;
	144
	145	sparc_ebus_dmas[slot].info.flags = 0;
	146	sparc_ebus_dmas[slot].info.callback = NULL;
	147	sparc_ebus_dmas[slot].info.client_cookie = NULL;
	148	sparc_ebus_dmas[slot].info.irq = 0xdeadbeef;
	149	strcpy(sparc_ebus_dmas[slot].info.name, "parport");
	150	if (ebus_dma_register(&sparc_ebus_dmas[slot].info))
	151	goto out_unmap_regs;
	152
	153	ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 1);
	154
	155	/* Configure IRQ to Push Pull, Level Low */
	156	/* Enable ECP, set bit 2 of the CTR first */
	157	outb(0x04, base + 0x02);
	158	ns87303_modify(config, PCR,
	159	PCR_EPP_ENABLE \|
	160	PCR_IRQ_ODRAIN,
	161	PCR_ECP_ENABLE \|
	162	PCR_ECP_CLK_ENA \|
	163	PCR_IRQ_POLAR);
	164
	165	/* CTR bit 5 controls direction of port */
	166	ns87303_modify(config, PTR,
	167	0, PTR_LPT_REG_DIR);
	168
	169	p = parport_pc_probe_port(base, base + 0x400,
1636f8ac	170	op->archdata.irqs[0],
a00736e9	171	slot,
28783eb5 AC	172	op->dev.parent,
28783eb5 AC	173	0);
a00736e9 SR	174	err = -ENOMEM;
	175	if (!p)
	176	goto out_disable_irq;
	177
	178	dev_set_drvdata(&op->dev, p);
	179
	180	return 0;
	181
	182	out_disable_irq:
	183	ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
	184	ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
	185
	186	out_unmap_regs:
	187	of_iounmap(&op->resource[2], sparc_ebus_dmas[slot].info.regs, d_len);
	188
	189	out_clear_map:
	190	clear_bit(slot, dma_slot_map);
	191
	192	out_err:
	193	return err;
	194	}
	195
7c9503b8	196	static int ecpp_remove(struct platform_device *op)
a00736e9 SR	197	{
	198	struct parport *p = dev_get_drvdata(&op->dev);
	199	int slot = p->dma;
	200
	201	parport_pc_unregister_port(p);
	202
	203	if (slot != PARPORT_DMA_NOFIFO) {
	204	unsigned long d_base = op->resource[2].start;
	205	unsigned long d_len;
	206
	207	d_len = (op->resource[2].end - d_base) + 1UL;
	208
	209	ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
	210	ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
	211	of_iounmap(&op->resource[2],
	212	sparc_ebus_dmas[slot].info.regs,
	213	d_len);
	214	clear_bit(slot, dma_slot_map);
	215	}
	216
	217	return 0;
	218	}
	219
fd098316	220	static const struct of_device_id ecpp_match[] = {
a00736e9 SR	221	{
	222	.name = "ecpp",
	223	},
	224	{
	225	.name = "parallel",
	226	.compatible = "ecpp",
	227	},
	228	{
	229	.name = "parallel",
	230	.compatible = "ns87317-ecpp",
	231	},
c8837434 DM	232	{
	233	.name = "parallel",
	234	.compatible = "pnpALI,1533,3",
	235	},
a00736e9 SR	236	{},
	237	};
	238
4ebb24f7	239	static struct platform_driver ecpp_driver = {
4018294b GL	240	.driver = {
4018294b GL	241	.name = "ecpp",
4018294b GL	242	.of_match_table = ecpp_match,
4018294b GL	243	},
a00736e9	244	.probe = ecpp_probe,
7c9503b8	245	.remove = ecpp_remove,
a00736e9 SR	246	};
	247
	248	static int parport_pc_find_nonpci_ports(int autoirq, int autodma)
	249	{
4ebb24f7	250	return platform_driver_register(&ecpp_driver);
a00736e9 SR	251	}
	252
	253	#endif /* !(_ASM_SPARC64_PARPORT_H */