[linux-2.6-block.git] / arch / sh / cchips / hd6446x / hd64461.c

// SPDX-License-Identifier: GPL-2.0
/*
 *	Copyright (C) 2000 YAEGASHI Takeshi
 *	Hitachi HD64461 companion chip support
 */

#include <linux/sched.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <asm/irq.h>
#include <asm/hd64461.h>

/* This belongs in cpu specific */
#define INTC_ICR1 0xA4140010UL

static void hd64461_mask_irq(struct irq_data *data)
{
	unsigned int irq = data->irq;
	unsigned short nimr;
	unsigned short mask = 1 << (irq - HD64461_IRQBASE);

	nimr = __raw_readw(HD64461_NIMR);
	nimr |= mask;
	__raw_writew(nimr, HD64461_NIMR);
}

static void hd64461_unmask_irq(struct irq_data *data)
{
	unsigned int irq = data->irq;
	unsigned short nimr;
	unsigned short mask = 1 << (irq - HD64461_IRQBASE);

	nimr = __raw_readw(HD64461_NIMR);
	nimr &= ~mask;
	__raw_writew(nimr, HD64461_NIMR);
}

static void hd64461_mask_and_ack_irq(struct irq_data *data)
{
	hd64461_mask_irq(data);

#ifdef CONFIG_HD64461_ENABLER
	if (data->irq == HD64461_IRQBASE + 13)
		__raw_writeb(0x00, HD64461_PCC1CSCR);
#endif
}

static struct irq_chip hd64461_irq_chip = {
	.name		= "HD64461-IRQ",
	.irq_mask	= hd64461_mask_irq,
	.irq_mask_ack	= hd64461_mask_and_ack_irq,
	.irq_unmask	= hd64461_unmask_irq,
};

static void hd64461_irq_demux(struct irq_desc *desc)
{
	unsigned short intv = __raw_readw(HD64461_NIRR);
	unsigned int ext_irq = HD64461_IRQBASE;

	intv &= (1 << HD64461_IRQ_NUM) - 1;

	for (; intv; intv >>= 1, ext_irq++) {
		if (!(intv & 1))
			continue;

		generic_handle_irq(ext_irq);
	}
}

int __init setup_hd64461(void)
{
	int irq_base, i;

	printk(KERN_INFO
	       "HD64461 configured at 0x%x on irq %d(mapped into %d to %d)\n",
	       HD64461_IOBASE, CONFIG_HD64461_IRQ, HD64461_IRQBASE,
	       HD64461_IRQBASE + 15);

/* Should be at processor specific part.. */
#if defined(CONFIG_CPU_SUBTYPE_SH7709)
	__raw_writew(0x2240, INTC_ICR1);
#endif
	__raw_writew(0xffff, HD64461_NIMR);

	irq_base = irq_alloc_descs(HD64461_IRQBASE, HD64461_IRQBASE, 16, -1);
	if (IS_ERR_VALUE(irq_base)) {
		pr_err("%s: failed hooking irqs for HD64461\n", __func__);
		return irq_base;
	}

	for (i = 0; i < 16; i++)
		irq_set_chip_and_handler(irq_base + i, &hd64461_irq_chip,
					 handle_level_irq);

	irq_set_chained_handler(CONFIG_HD64461_IRQ, hd64461_irq_demux);
	irq_set_irq_type(CONFIG_HD64461_IRQ, IRQ_TYPE_LEVEL_LOW);

#ifdef CONFIG_HD64461_ENABLER
	printk(KERN_INFO "HD64461: enabling PCMCIA devices\n");
	__raw_writeb(0x4c, HD64461_PCC1CSCIER);
	__raw_writeb(0x00, HD64461_PCC1CSCR);
#endif

	return 0;
}

module_init(setup_hd64461);
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4	2	/*
1da177e4 LT	3	* Copyright (C) 2000 YAEGASHI Takeshi
	4	* Hitachi HD64461 companion chip support
	5	*/
	6
1da177e4 LT	7	#include <linux/sched.h>
	8	#include <linux/module.h>
	9	#include <linux/kernel.h>
	10	#include <linux/param.h>
	11	#include <linux/interrupt.h>
	12	#include <linux/init.h>
	13	#include <linux/irq.h>
135210b3	14	#include <linux/io.h>
1da177e4	15	#include <asm/irq.h>
6d75e650	16	#include <asm/hd64461.h>
1da177e4	17
f1382305 KE	18	/* This belongs in cpu specific */
	19	#define INTC_ICR1 0xA4140010UL
	20
19add7e1	21	static void hd64461_mask_irq(struct irq_data *data)
1da177e4	22	{
19add7e1	23	unsigned int irq = data->irq;
1da177e4 LT	24	unsigned short nimr;
	25	unsigned short mask = 1 << (irq - HD64461_IRQBASE);
	26
135210b3	27	nimr = __raw_readw(HD64461_NIMR);
1da177e4	28	nimr \|= mask;
135210b3	29	__raw_writew(nimr, HD64461_NIMR);
1da177e4 LT	30	}
1da177e4 LT	31
19add7e1	32	static void hd64461_unmask_irq(struct irq_data *data)
1da177e4	33	{
19add7e1	34	unsigned int irq = data->irq;
1da177e4 LT	35	unsigned short nimr;
	36	unsigned short mask = 1 << (irq - HD64461_IRQBASE);
	37
135210b3	38	nimr = __raw_readw(HD64461_NIMR);
1da177e4	39	nimr &= ~mask;
135210b3	40	__raw_writew(nimr, HD64461_NIMR);
1da177e4 LT	41	}
1da177e4 LT	42
19add7e1	43	static void hd64461_mask_and_ack_irq(struct irq_data *data)
1da177e4	44	{
19add7e1 PM	45	hd64461_mask_irq(data);
19add7e1 PM	46
1da177e4	47	#ifdef CONFIG_HD64461_ENABLER
19add7e1	48	if (data->irq == HD64461_IRQBASE + 13)
135210b3	49	__raw_writeb(0x00, HD64461_PCC1CSCR);
1da177e4 LT	50	#endif
	51	}
	52
135210b3 MF	53	static struct irq_chip hd64461_irq_chip = {
135210b3 MF	54	.name = "HD64461-IRQ",
19add7e1 PM	55	.irq_mask = hd64461_mask_irq,
	56	.irq_mask_ack = hd64461_mask_and_ack_irq,
	57	.irq_unmask = hd64461_unmask_irq,
1da177e4 LT	58	};
1da177e4 LT	59
bd0b9ac4	60	static void hd64461_irq_demux(struct irq_desc *desc)
1da177e4	61	{
9d56dd3b	62	unsigned short intv = __raw_readw(HD64461_NIRR);
3bf50923 RIZ	63	unsigned int ext_irq = HD64461_IRQBASE;
	64
	65	intv &= (1 << HD64461_IRQ_NUM) - 1;
	66
b06ede84 PM	67	for (; intv; intv >>= 1, ext_irq++) {
	68	if (!(intv & 1))
	69	continue;
	70
	71	generic_handle_irq(ext_irq);
1da177e4	72	}
1da177e4 LT	73	}
1da177e4 LT	74
1da177e4 LT	75	int __init setup_hd64461(void)
1da177e4 LT	76	{
051f923d	77	int irq_base, i;
1da177e4 LT	78
	79	printk(KERN_INFO
	80	"HD64461 configured at 0x%x on irq %d(mapped into %d to %d)\n",
62669e61	81	HD64461_IOBASE, CONFIG_HD64461_IRQ, HD64461_IRQBASE,
1da177e4 LT	82	HD64461_IRQBASE + 15);
1da177e4 LT	83
135210b3 MF	84	/* Should be at processor specific part.. */
	85	#if defined(CONFIG_CPU_SUBTYPE_SH7709)
	86	__raw_writew(0x2240, INTC_ICR1);
1da177e4	87	#endif
135210b3	88	__raw_writew(0xffff, HD64461_NIMR);
1da177e4	89
051f923d PM	90	irq_base = irq_alloc_descs(HD64461_IRQBASE, HD64461_IRQBASE, 16, -1);
	91	if (IS_ERR_VALUE(irq_base)) {
	92	pr_err("%s: failed hooking irqs for HD64461\n", __func__);
	93	return irq_base;
6eb6f983	94	}
1da177e4	95
051f923d PM	96	for (i = 0; i < 16; i++)
	97	irq_set_chip_and_handler(irq_base + i, &hd64461_irq_chip,
	98	handle_level_irq);
	99
fcb8918f TG	100	irq_set_chained_handler(CONFIG_HD64461_IRQ, hd64461_irq_demux);
fcb8918f TG	101	irq_set_irq_type(CONFIG_HD64461_IRQ, IRQ_TYPE_LEVEL_LOW);
3bf50923	102
1da177e4 LT	103	#ifdef CONFIG_HD64461_ENABLER
1da177e4 LT	104	printk(KERN_INFO "HD64461: enabling PCMCIA devices\n");
135210b3 MF	105	__raw_writeb(0x4c, HD64461_PCC1CSCIER);
135210b3 MF	106	__raw_writeb(0x00, HD64461_PCC1CSCR);
1da177e4 LT	107	#endif
	108
	109	return 0;
	110	}
	111
	112	module_init(setup_hd64461);