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