[net-next-2.6.git] / arch / sh / boards / mach-microdev / irq.c

/*
 * arch/sh/boards/superh/microdev/irq.c
 *
 * Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com)
 *
 * SuperH SH4-202 MicroDev board support.
 *
 * May be copied or modified under the terms of the GNU General Public
 * License.  See linux/COPYING for more information.
 */

#include <linux/init.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <asm/system.h>
#include <asm/io.h>
#include <mach/microdev.h>

#define NUM_EXTERNAL_IRQS 16	/* IRL0 .. IRL15 */

static const struct {
	unsigned char fpgaIrq;
	unsigned char mapped;
	const char *name;
} fpgaIrqTable[NUM_EXTERNAL_IRQS] = {
	{ 0,				0,	"unused"   },		/* IRQ #0	IRL=15	0x200  */
	{ MICRODEV_FPGA_IRQ_KEYBOARD,	1,	"keyboard" },		/* IRQ #1	IRL=14	0x220  */
	{ MICRODEV_FPGA_IRQ_SERIAL1,	1,	"Serial #1"},		/* IRQ #2	IRL=13	0x240  */
	{ MICRODEV_FPGA_IRQ_ETHERNET,	1,	"Ethernet" },		/* IRQ #3	IRL=12	0x260  */
	{ MICRODEV_FPGA_IRQ_SERIAL2,	0,	"Serial #2"},		/* IRQ #4	IRL=11	0x280  */
	{ 0,				0,	"unused"   },		/* IRQ #5	IRL=10	0x2a0  */
	{ 0,				0,	"unused"   },		/* IRQ #6	IRL=9	0x2c0  */
	{ MICRODEV_FPGA_IRQ_USB_HC,	1,	"USB"	   },		/* IRQ #7	IRL=8	0x2e0  */
	{ MICRODEV_IRQ_PCI_INTA,	1,	"PCI INTA" },		/* IRQ #8	IRL=7	0x300  */
	{ MICRODEV_IRQ_PCI_INTB,	1,	"PCI INTB" },		/* IRQ #9	IRL=6	0x320  */
	{ MICRODEV_IRQ_PCI_INTC,	1,	"PCI INTC" },		/* IRQ #10	IRL=5	0x340  */
	{ MICRODEV_IRQ_PCI_INTD,	1,	"PCI INTD" },		/* IRQ #11	IRL=4	0x360  */
	{ MICRODEV_FPGA_IRQ_MOUSE,	1,	"mouse"    },		/* IRQ #12	IRL=3	0x380  */
	{ MICRODEV_FPGA_IRQ_IDE2,	1,	"IDE #2"   },		/* IRQ #13	IRL=2	0x3a0  */
	{ MICRODEV_FPGA_IRQ_IDE1,	1,	"IDE #1"   },		/* IRQ #14	IRL=1	0x3c0  */
	{ 0,				0,	"unused"   },		/* IRQ #15	IRL=0	0x3e0  */
};

#if (MICRODEV_LINUX_IRQ_KEYBOARD != 1)
#  error Inconsistancy in defining the IRQ# for Keyboard!
#endif

#if (MICRODEV_LINUX_IRQ_ETHERNET != 3)
#  error Inconsistancy in defining the IRQ# for Ethernet!
#endif

#if (MICRODEV_LINUX_IRQ_USB_HC != 7)
#  error Inconsistancy in defining the IRQ# for USB!
#endif

#if (MICRODEV_LINUX_IRQ_MOUSE != 12)
#  error Inconsistancy in defining the IRQ# for PS/2 Mouse!
#endif

#if (MICRODEV_LINUX_IRQ_IDE2 != 13)
#  error Inconsistancy in defining the IRQ# for secondary IDE!
#endif

#if (MICRODEV_LINUX_IRQ_IDE1 != 14)
#  error Inconsistancy in defining the IRQ# for primary IDE!
#endif

static void disable_microdev_irq(struct irq_data *data)
{
	unsigned int irq = data->irq;
	unsigned int fpgaIrq;

	if (irq >= NUM_EXTERNAL_IRQS)
		return;
	if (!fpgaIrqTable[irq].mapped)
		return;

	fpgaIrq = fpgaIrqTable[irq].fpgaIrq;

	/* disable interrupts on the FPGA INTC register */
	__raw_writel(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTDSB_REG);
}

static void enable_microdev_irq(struct irq_data *data)
{
	unsigned int irq = data->irq;
	unsigned long priorityReg, priorities, pri;
	unsigned int fpgaIrq;

	if (unlikely(irq >= NUM_EXTERNAL_IRQS))
		return;
	if (unlikely(!fpgaIrqTable[irq].mapped))
		return;

	pri = 15 - irq;

	fpgaIrq = fpgaIrqTable[irq].fpgaIrq;
	priorityReg = MICRODEV_FPGA_INTPRI_REG(fpgaIrq);

	/* set priority for the interrupt */
	priorities = __raw_readl(priorityReg);
	priorities &= ~MICRODEV_FPGA_INTPRI_MASK(fpgaIrq);
	priorities |= MICRODEV_FPGA_INTPRI_LEVEL(fpgaIrq, pri);
	__raw_writel(priorities, priorityReg);

	/* enable interrupts on the FPGA INTC register */
	__raw_writel(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTENB_REG);
}

static struct irq_chip microdev_irq_type = {
	.name = "MicroDev-IRQ",
	.irq_unmask = enable_microdev_irq,
	.irq_mask = disable_microdev_irq,
};

/* This function sets the desired irq handler to be a MicroDev type */
static void __init make_microdev_irq(unsigned int irq)
{
	disable_irq_nosync(irq);
	set_irq_chip_and_handler(irq, &microdev_irq_type, handle_level_irq);
	disable_microdev_irq(irq_get_irq_data(irq));
}

extern void __init init_microdev_irq(void)
{
	int i;

	/* disable interrupts on the FPGA INTC register */
	__raw_writel(~0ul, MICRODEV_FPGA_INTDSB_REG);

	for (i = 0; i < NUM_EXTERNAL_IRQS; i++)
		make_microdev_irq(i);
}

extern void microdev_print_fpga_intc_status(void)
{
	volatile unsigned int * const intenb = (unsigned int*)MICRODEV_FPGA_INTENB_REG;
	volatile unsigned int * const intdsb = (unsigned int*)MICRODEV_FPGA_INTDSB_REG;
	volatile unsigned int * const intpria = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(0);
	volatile unsigned int * const intprib = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(8);
	volatile unsigned int * const intpric = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(16);
	volatile unsigned int * const intprid = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(24);
	volatile unsigned int * const intsrc = (unsigned int*)MICRODEV_FPGA_INTSRC_REG;
	volatile unsigned int * const intreq = (unsigned int*)MICRODEV_FPGA_INTREQ_REG;

	printk("-------------------------- microdev_print_fpga_intc_status() ------------------\n");
	printk("FPGA_INTENB = 0x%08x\n", *intenb);
	printk("FPGA_INTDSB = 0x%08x\n", *intdsb);
	printk("FPGA_INTSRC = 0x%08x\n", *intsrc);
	printk("FPGA_INTREQ = 0x%08x\n", *intreq);
	printk("FPGA_INTPRI[3..0] = %08x:%08x:%08x:%08x\n", *intprid, *intpric, *intprib, *intpria);
	printk("-------------------------------------------------------------------------------\n");
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* arch/sh/boards/superh/microdev/irq.c
	3	*
	4	* Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com)
	5	*
	6	* SuperH SH4-202 MicroDev board support.
	7	*
	8	* May be copied or modified under the terms of the GNU General Public
	9	* License. See linux/COPYING for more information.
	10	*/
	11
1da177e4 LT	12	#include <linux/init.h>
1da177e4 LT	13	#include <linux/irq.h>
8b19a7ce	14	#include <linux/interrupt.h>
1da177e4 LT	15	#include <asm/system.h>
1da177e4 LT	16	#include <asm/io.h>
7639a454	17	#include <mach/microdev.h>
1da177e4 LT	18
	19	#define NUM_EXTERNAL_IRQS 16 /* IRL0 .. IRL15 */
	20
1da177e4 LT	21	static const struct {
	22	unsigned char fpgaIrq;
	23	unsigned char mapped;
	24	const char *name;
	25	} fpgaIrqTable[NUM_EXTERNAL_IRQS] = {
	26	{ 0, 0, "unused" }, /* IRQ #0 IRL=15 0x200 */
	27	{ MICRODEV_FPGA_IRQ_KEYBOARD, 1, "keyboard" }, /* IRQ #1 IRL=14 0x220 */
	28	{ MICRODEV_FPGA_IRQ_SERIAL1, 1, "Serial #1"}, /* IRQ #2 IRL=13 0x240 */
	29	{ MICRODEV_FPGA_IRQ_ETHERNET, 1, "Ethernet" }, /* IRQ #3 IRL=12 0x260 */
	30	{ MICRODEV_FPGA_IRQ_SERIAL2, 0, "Serial #2"}, /* IRQ #4 IRL=11 0x280 */
	31	{ 0, 0, "unused" }, /* IRQ #5 IRL=10 0x2a0 */
	32	{ 0, 0, "unused" }, /* IRQ #6 IRL=9 0x2c0 */
	33	{ MICRODEV_FPGA_IRQ_USB_HC, 1, "USB" }, /* IRQ #7 IRL=8 0x2e0 */
	34	{ MICRODEV_IRQ_PCI_INTA, 1, "PCI INTA" }, /* IRQ #8 IRL=7 0x300 */
	35	{ MICRODEV_IRQ_PCI_INTB, 1, "PCI INTB" }, /* IRQ #9 IRL=6 0x320 */
	36	{ MICRODEV_IRQ_PCI_INTC, 1, "PCI INTC" }, /* IRQ #10 IRL=5 0x340 */
	37	{ MICRODEV_IRQ_PCI_INTD, 1, "PCI INTD" }, /* IRQ #11 IRL=4 0x360 */
	38	{ MICRODEV_FPGA_IRQ_MOUSE, 1, "mouse" }, /* IRQ #12 IRL=3 0x380 */
	39	{ MICRODEV_FPGA_IRQ_IDE2, 1, "IDE #2" }, /* IRQ #13 IRL=2 0x3a0 */
	40	{ MICRODEV_FPGA_IRQ_IDE1, 1, "IDE #1" }, /* IRQ #14 IRL=1 0x3c0 */
	41	{ 0, 0, "unused" }, /* IRQ #15 IRL=0 0x3e0 */
	42	};
	43
	44	#if (MICRODEV_LINUX_IRQ_KEYBOARD != 1)
	45	# error Inconsistancy in defining the IRQ# for Keyboard!
	46	#endif
	47
	48	#if (MICRODEV_LINUX_IRQ_ETHERNET != 3)
	49	# error Inconsistancy in defining the IRQ# for Ethernet!
	50	#endif
	51
	52	#if (MICRODEV_LINUX_IRQ_USB_HC != 7)
	53	# error Inconsistancy in defining the IRQ# for USB!
	54	#endif
	55
	56	#if (MICRODEV_LINUX_IRQ_MOUSE != 12)
	57	# error Inconsistancy in defining the IRQ# for PS/2 Mouse!
	58	#endif
	59
	60	#if (MICRODEV_LINUX_IRQ_IDE2 != 13)
	61	# error Inconsistancy in defining the IRQ# for secondary IDE!
	62	#endif
	63
	64	#if (MICRODEV_LINUX_IRQ_IDE1 != 14)
	65	# error Inconsistancy in defining the IRQ# for primary IDE!
	66	#endif
	67
d6138832	68	static void disable_microdev_irq(struct irq_data *data)
1da177e4	69	{
d6138832	70	unsigned int irq = data->irq;
1da177e4 LT	71	unsigned int fpgaIrq;
1da177e4 LT	72
8599cf05 PM	73	if (irq >= NUM_EXTERNAL_IRQS)
	74	return;
	75	if (!fpgaIrqTable[irq].mapped)
	76	return;
1da177e4 LT	77
	78	fpgaIrq = fpgaIrqTable[irq].fpgaIrq;
	79
e868d612	80	/* disable interrupts on the FPGA INTC register */
9d56dd3b	81	__raw_writel(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTDSB_REG);
1da177e4 LT	82	}
1da177e4 LT	83
d6138832	84	static void enable_microdev_irq(struct irq_data *data)
1da177e4	85	{
d6138832	86	unsigned int irq = data->irq;
1da177e4	87	unsigned long priorityReg, priorities, pri;
1da177e4 LT	88	unsigned int fpgaIrq;
1da177e4 LT	89
8599cf05 PM	90	if (unlikely(irq >= NUM_EXTERNAL_IRQS))
	91	return;
	92	if (unlikely(!fpgaIrqTable[irq].mapped))
	93	return;
1da177e4 LT	94
	95	pri = 15 - irq;
	96
	97	fpgaIrq = fpgaIrqTable[irq].fpgaIrq;
	98	priorityReg = MICRODEV_FPGA_INTPRI_REG(fpgaIrq);
	99
8599cf05	100	/* set priority for the interrupt */
9d56dd3b	101	priorities = __raw_readl(priorityReg);
1da177e4 LT	102	priorities &= ~MICRODEV_FPGA_INTPRI_MASK(fpgaIrq);
1da177e4 LT	103	priorities \|= MICRODEV_FPGA_INTPRI_LEVEL(fpgaIrq, pri);
9d56dd3b	104	__raw_writel(priorities, priorityReg);
1da177e4	105
e868d612	106	/* enable interrupts on the FPGA INTC register */
9d56dd3b	107	__raw_writel(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTENB_REG);
1da177e4 LT	108	}
1da177e4 LT	109
d6138832 PM	110	static struct irq_chip microdev_irq_type = {
	111	.name = "MicroDev-IRQ",
	112	.irq_unmask = enable_microdev_irq,
	113	.irq_mask = disable_microdev_irq,
	114	};
	115
be729fd8	116	/* This function sets the desired irq handler to be a MicroDev type */
1da177e4 LT	117	static void __init make_microdev_irq(unsigned int irq)
	118	{
	119	disable_irq_nosync(irq);
be729fd8	120	set_irq_chip_and_handler(irq, &microdev_irq_type, handle_level_irq);
d6138832	121	disable_microdev_irq(irq_get_irq_data(irq));
1da177e4 LT	122	}
1da177e4 LT	123
1da177e4 LT	124	extern void __init init_microdev_irq(void)
	125	{
	126	int i;
	127
be729fd8	128	/* disable interrupts on the FPGA INTC register */
9d56dd3b	129	__raw_writel(~0ul, MICRODEV_FPGA_INTDSB_REG);
1da177e4 LT	130
1da177e4 LT	131	for (i = 0; i < NUM_EXTERNAL_IRQS; i++)
1da177e4	132	make_microdev_irq(i);
1da177e4 LT	133	}
	134
	135	extern void microdev_print_fpga_intc_status(void)
	136	{
	137	volatile unsigned int * const intenb = (unsigned int*)MICRODEV_FPGA_INTENB_REG;
	138	volatile unsigned int * const intdsb = (unsigned int*)MICRODEV_FPGA_INTDSB_REG;
	139	volatile unsigned int * const intpria = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(0);
	140	volatile unsigned int * const intprib = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(8);
	141	volatile unsigned int * const intpric = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(16);
	142	volatile unsigned int * const intprid = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(24);
	143	volatile unsigned int * const intsrc = (unsigned int*)MICRODEV_FPGA_INTSRC_REG;
	144	volatile unsigned int * const intreq = (unsigned int*)MICRODEV_FPGA_INTREQ_REG;
	145
	146	printk("-------------------------- microdev_print_fpga_intc_status() ------------------\n");
	147	printk("FPGA_INTENB = 0x%08x\n", *intenb);
	148	printk("FPGA_INTDSB = 0x%08x\n", *intdsb);
	149	printk("FPGA_INTSRC = 0x%08x\n", *intsrc);
	150	printk("FPGA_INTREQ = 0x%08x\n", *intreq);
	151	printk("FPGA_INTPRI[3..0] = %08x:%08x:%08x:%08x\n", intprid, intpric, intprib, intpria);
	152	printk("-------------------------------------------------------------------------------\n");
	153	}