[mirror_ubuntu-artful-kernel.git] / drivers / parisc / eisa.c

/*
 * eisa.c - provide support for EISA adapters in PA-RISC machines
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
 * Copyright (c) 2001 Matthew Wilcox for Hewlett Packard
 * Copyright (c) 2001 Daniel Engstrom <5116@telia.com>
 *
 * There are two distinct EISA adapters.  Mongoose is found in machines
 * before the 712; then the Wax ASIC is used.  To complicate matters, the
 * Wax ASIC also includes a PS/2 and RS-232 controller, but those are
 * dealt with elsewhere; this file is concerned only with the EISA portions
 * of Wax.
 * 
 * 
 * HINT:
 * -----
 * To allow an ISA card to work properly in the EISA slot you need to
 * set an edge trigger level. This may be done on the palo command line 
 * by adding the kernel parameter "eisa_irq_edge=n,n2,[...]]", with 
 * n and n2 as the irq levels you want to use.
 * 
 * Example: "eisa_irq_edge=10,11" allows ISA cards to operate at 
 * irq levels 10 and 11.
 */

#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/eisa.h>

#include <asm/byteorder.h>
#include <asm/io.h>
#include <asm/hardware.h>
#include <asm/processor.h>
#include <asm/parisc-device.h>
#include <asm/delay.h>
#include <asm/eisa_bus.h>
#include <asm/eisa_eeprom.h>

#if 0
#define EISA_DBG(msg, arg... ) printk(KERN_DEBUG "eisa: " msg , ## arg )
#else
#define EISA_DBG(msg, arg... )  
#endif

#define SNAKES_EEPROM_BASE_ADDR 0xF0810400
#define MIRAGE_EEPROM_BASE_ADDR 0xF00C0400

static DEFINE_SPINLOCK(eisa_irq_lock);

void __iomem *eisa_eeprom_addr __read_mostly;

/* We can only have one EISA adapter in the system because neither
 * implementation can be flexed.
 */
static struct eisa_ba {
	struct pci_hba_data	hba;
	unsigned long eeprom_addr;
	struct eisa_root_device root;
} eisa_dev;

/* Port ops */

static inline unsigned long eisa_permute(unsigned short port)
{
	if (port & 0x300) {
		return 0xfc000000 | ((port & 0xfc00) >> 6)
			| ((port & 0x3f8) << 9) | (port & 7);
	} else {
		return 0xfc000000 | port;
	}
}

unsigned char eisa_in8(unsigned short port)
{
	if (EISA_bus)
		return gsc_readb(eisa_permute(port));
	return 0xff;
}

unsigned short eisa_in16(unsigned short port)
{
	if (EISA_bus)
		return le16_to_cpu(gsc_readw(eisa_permute(port)));
	return 0xffff;
}

unsigned int eisa_in32(unsigned short port)
{
	if (EISA_bus)
		return le32_to_cpu(gsc_readl(eisa_permute(port)));
	return 0xffffffff;
}

void eisa_out8(unsigned char data, unsigned short port)
{
	if (EISA_bus)
		gsc_writeb(data, eisa_permute(port));
}

void eisa_out16(unsigned short data, unsigned short port)
{
	if (EISA_bus)	
		gsc_writew(cpu_to_le16(data), eisa_permute(port));
}

void eisa_out32(unsigned int data, unsigned short port)
{
	if (EISA_bus)
		gsc_writel(cpu_to_le32(data), eisa_permute(port));
}

#ifndef CONFIG_PCI
/* We call these directly without PCI.  See asm/io.h. */
EXPORT_SYMBOL(eisa_in8);
EXPORT_SYMBOL(eisa_in16);
EXPORT_SYMBOL(eisa_in32);
EXPORT_SYMBOL(eisa_out8);
EXPORT_SYMBOL(eisa_out16);
EXPORT_SYMBOL(eisa_out32);
#endif

/* Interrupt handling */

/* cached interrupt mask registers */
static int master_mask;
static int slave_mask;

/* the trig level can be set with the
 * eisa_irq_edge=n,n,n commandline parameter 
 * We should really read this from the EEPROM 
 * in the furure. 
 */
/* irq 13,8,2,1,0 must be edge */
static unsigned int eisa_irq_level __read_mostly; /* default to edge triggered */


/* called by free irq */
static void eisa_mask_irq(unsigned int irq)
{
	unsigned long flags;

	EISA_DBG("disable irq %d\n", irq);
	/* just mask for now */
	spin_lock_irqsave(&eisa_irq_lock, flags);
        if (irq & 8) {
		slave_mask |= (1 << (irq&7));
		eisa_out8(slave_mask, 0xa1);
	} else {
		master_mask |= (1 << (irq&7));
		eisa_out8(master_mask, 0x21);
	}
	spin_unlock_irqrestore(&eisa_irq_lock, flags);
	EISA_DBG("pic0 mask %02x\n", eisa_in8(0x21));
	EISA_DBG("pic1 mask %02x\n", eisa_in8(0xa1));
}

/* called by request irq */
static void eisa_unmask_irq(unsigned int irq)
{
	unsigned long flags;
	EISA_DBG("enable irq %d\n", irq);
		
	spin_lock_irqsave(&eisa_irq_lock, flags);
        if (irq & 8) {
		slave_mask &= ~(1 << (irq&7));
		eisa_out8(slave_mask, 0xa1);
	} else {
		master_mask &= ~(1 << (irq&7));
		eisa_out8(master_mask, 0x21);
	}
	spin_unlock_irqrestore(&eisa_irq_lock, flags);
	EISA_DBG("pic0 mask %02x\n", eisa_in8(0x21));
	EISA_DBG("pic1 mask %02x\n", eisa_in8(0xa1));
}

static struct irq_chip eisa_interrupt_type = {
	.name	=	"EISA",
	.unmask	=	eisa_unmask_irq,
	.mask	=	eisa_mask_irq,
};

static irqreturn_t eisa_irq(int wax_irq, void *intr_dev)
{
	int irq = gsc_readb(0xfc01f000); /* EISA supports 16 irqs */
	unsigned long flags;
        
	spin_lock_irqsave(&eisa_irq_lock, flags);
	/* read IRR command */
	eisa_out8(0x0a, 0x20);
	eisa_out8(0x0a, 0xa0);

	EISA_DBG("irq IAR %02x 8259-1 irr %02x 8259-2 irr %02x\n",
		   irq, eisa_in8(0x20), eisa_in8(0xa0));
   
	/* read ISR command */
	eisa_out8(0x0a, 0x20);
	eisa_out8(0x0a, 0xa0);
	EISA_DBG("irq 8259-1 isr %02x imr %02x 8259-2 isr %02x imr %02x\n",
		 eisa_in8(0x20), eisa_in8(0x21), eisa_in8(0xa0), eisa_in8(0xa1));
	
	irq &= 0xf;
	
	/* mask irq and write eoi */
	if (irq & 8) {
		slave_mask |= (1 << (irq&7));
		eisa_out8(slave_mask, 0xa1);
		eisa_out8(0x60 | (irq&7),0xa0);/* 'Specific EOI' to slave */
		eisa_out8(0x62,0x20);	/* 'Specific EOI' to master-IRQ2 */
		
	} else {
		master_mask |= (1 << (irq&7));
		eisa_out8(master_mask, 0x21);
		eisa_out8(0x60|irq,0x20);	/* 'Specific EOI' to master */
	}
	spin_unlock_irqrestore(&eisa_irq_lock, flags);

	generic_handle_irq(irq);
   
	spin_lock_irqsave(&eisa_irq_lock, flags);
	/* unmask */
        if (irq & 8) {
		slave_mask &= ~(1 << (irq&7));
		eisa_out8(slave_mask, 0xa1);
	} else {
		master_mask &= ~(1 << (irq&7));
		eisa_out8(master_mask, 0x21);
	}
	spin_unlock_irqrestore(&eisa_irq_lock, flags);
	return IRQ_HANDLED;
}

static irqreturn_t dummy_irq2_handler(int _, void *dev)
{
	printk(KERN_ALERT "eisa: uhh, irq2?\n");
	return IRQ_HANDLED;
}

static struct irqaction irq2_action = {
	.handler = dummy_irq2_handler,
	.name = "cascade",
};

static void init_eisa_pic(void)
{
	unsigned long flags;
	
	spin_lock_irqsave(&eisa_irq_lock, flags);

	eisa_out8(0xff, 0x21); /* mask during init */
	eisa_out8(0xff, 0xa1); /* mask during init */
	
	/* master pic */
	eisa_out8(0x11,0x20); /* ICW1 */   
	eisa_out8(0x00,0x21); /* ICW2 */   
	eisa_out8(0x04,0x21); /* ICW3 */   
	eisa_out8(0x01,0x21); /* ICW4 */   
	eisa_out8(0x40,0x20); /* OCW2 */   
	
	/* slave pic */
	eisa_out8(0x11,0xa0); /* ICW1 */   
	eisa_out8(0x08,0xa1); /* ICW2 */   
        eisa_out8(0x02,0xa1); /* ICW3 */   
	eisa_out8(0x01,0xa1); /* ICW4 */   
	eisa_out8(0x40,0xa0); /* OCW2 */   
        
	udelay(100);
	
	slave_mask = 0xff; 
	master_mask = 0xfb; 
	eisa_out8(slave_mask, 0xa1); /* OCW1 */
	eisa_out8(master_mask, 0x21); /* OCW1 */
	
	/* setup trig level */
	EISA_DBG("EISA edge/level %04x\n", eisa_irq_level);
	
	eisa_out8(eisa_irq_level&0xff, 0x4d0); /* Set all irq's to edge  */
	eisa_out8((eisa_irq_level >> 8) & 0xff, 0x4d1); 
	
	EISA_DBG("pic0 mask %02x\n", eisa_in8(0x21));
	EISA_DBG("pic1 mask %02x\n", eisa_in8(0xa1));
	EISA_DBG("pic0 edge/level %02x\n", eisa_in8(0x4d0));
	EISA_DBG("pic1 edge/level %02x\n", eisa_in8(0x4d1));
	
	spin_unlock_irqrestore(&eisa_irq_lock, flags);
}

/* Device initialisation */

#define is_mongoose(dev) (dev->id.sversion == 0x00076)

static int __init eisa_probe(struct parisc_device *dev)
{
	int i, result;

	char *name = is_mongoose(dev) ? "Mongoose" : "Wax";

	printk(KERN_INFO "%s EISA Adapter found at 0x%08lx\n", 
		name, (unsigned long)dev->hpa.start);

	eisa_dev.hba.dev = dev;
	eisa_dev.hba.iommu = ccio_get_iommu(dev);

	eisa_dev.hba.lmmio_space.name = "EISA";
	eisa_dev.hba.lmmio_space.start = F_EXTEND(0xfc000000);
	eisa_dev.hba.lmmio_space.end = F_EXTEND(0xffbfffff);
	eisa_dev.hba.lmmio_space.flags = IORESOURCE_MEM;
	result = ccio_request_resource(dev, &eisa_dev.hba.lmmio_space);
	if (result < 0) {
		printk(KERN_ERR "EISA: failed to claim EISA Bus address space!\n");
		return result;
	}
	eisa_dev.hba.io_space.name = "EISA";
	eisa_dev.hba.io_space.start = 0;
	eisa_dev.hba.io_space.end = 0xffff;
	eisa_dev.hba.lmmio_space.flags = IORESOURCE_IO;
	result = request_resource(&ioport_resource, &eisa_dev.hba.io_space);
	if (result < 0) {
		printk(KERN_ERR "EISA: failed to claim EISA Bus port space!\n");
		return result;
	}
	pcibios_register_hba(&eisa_dev.hba);

	result = request_irq(dev->irq, eisa_irq, IRQF_SHARED, "EISA", &eisa_dev);
	if (result) {
		printk(KERN_ERR "EISA: request_irq failed!\n");
		return result;
	}
	
	/* Reserve IRQ2 */
	setup_irq(2, &irq2_action);
	for (i = 0; i < 16; i++) {
		set_irq_chip_and_handler(i, &eisa_interrupt_type,
					 handle_simple_irq);
	}
	
	EISA_bus = 1;

	if (dev->num_addrs) {
		/* newer firmware hand out the eeprom address */
		eisa_dev.eeprom_addr = dev->addr[0];
	} else {
		/* old firmware, need to figure out the box */
		if (is_mongoose(dev)) {
			eisa_dev.eeprom_addr = SNAKES_EEPROM_BASE_ADDR;
		} else {
			eisa_dev.eeprom_addr = MIRAGE_EEPROM_BASE_ADDR;
		}
	}
	eisa_eeprom_addr = ioremap_nocache(eisa_dev.eeprom_addr, HPEE_MAX_LENGTH);
	result = eisa_enumerator(eisa_dev.eeprom_addr, &eisa_dev.hba.io_space,
			&eisa_dev.hba.lmmio_space);
	init_eisa_pic();

	if (result >= 0) {
		/* FIXME : Don't enumerate the bus twice. */
		eisa_dev.root.dev = &dev->dev;
		dev_set_drvdata(&dev->dev, &eisa_dev.root);
		eisa_dev.root.bus_base_addr = 0;
		eisa_dev.root.res = &eisa_dev.hba.io_space;
		eisa_dev.root.slots = result;
		eisa_dev.root.dma_mask = 0xffffffff; /* wild guess */
		if (eisa_root_register (&eisa_dev.root)) {
			printk(KERN_ERR "EISA: Failed to register EISA root\n");
			return -1;
		}
	}
	
	return 0;
}

static const struct parisc_device_id eisa_tbl[] = {
	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00076 }, /* Mongoose */
	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00090 }, /* Wax EISA */
	{ 0, }
};

MODULE_DEVICE_TABLE(parisc, eisa_tbl);

static struct parisc_driver eisa_driver = {
	.name =		"eisa_ba",
	.id_table =	eisa_tbl,
	.probe =	eisa_probe,
};

void __init eisa_init(void)
{
	register_parisc_driver(&eisa_driver);
}


static unsigned int eisa_irq_configured;
void eisa_make_irq_level(int num)
{
	if (eisa_irq_configured& (1<<num)) {
		printk(KERN_WARNING
		       "IRQ %d polarity configured twice (last to level)\n", 
		       num);
	}
	eisa_irq_level |= (1<<num); /* set the corresponding bit */
	eisa_irq_configured |= (1<<num); /* set the corresponding bit */
}

void eisa_make_irq_edge(int num)
{
	if (eisa_irq_configured& (1<<num)) {
		printk(KERN_WARNING 
		       "IRQ %d polarity configured twice (last to edge)\n",
		       num);
	}
	eisa_irq_level &= ~(1<<num); /* clear the corresponding bit */
	eisa_irq_configured |= (1<<num); /* set the corresponding bit */
}

static int __init eisa_irq_setup(char *str)
{
	char *cur = str;
	int val;

	EISA_DBG("IRQ setup\n");
	while (cur != NULL) {
		char *pe;
		
		val = (int) simple_strtoul(cur, &pe, 0);
		if (val > 15 || val < 0) {
			printk(KERN_ERR "eisa: EISA irq value are 0-15\n");
			continue;
		}
		if (val == 2) { 
			val = 9;
		}
		eisa_make_irq_edge(val); /* clear the corresponding bit */
		EISA_DBG("setting IRQ %d to edge-triggered mode\n", val);
		
		if ((cur = strchr(cur, ','))) {
			cur++;
		} else {
			break;
		}
	}
	return 1;
}

__setup("eisa_irq_edge=", eisa_irq_setup);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* eisa.c - provide support for EISA adapters in PA-RISC machines
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*
	9	* Copyright (c) 2001 Matthew Wilcox for Hewlett Packard
	10	* Copyright (c) 2001 Daniel Engstrom <5116@telia.com>
	11	*
	12	* There are two distinct EISA adapters. Mongoose is found in machines
	13	* before the 712; then the Wax ASIC is used. To complicate matters, the
	14	* Wax ASIC also includes a PS/2 and RS-232 controller, but those are
	15	* dealt with elsewhere; this file is concerned only with the EISA portions
	16	* of Wax.
	17	*
	18	*
	19	* HINT:
	20	* -----
	21	* To allow an ISA card to work properly in the EISA slot you need to
	22	* set an edge trigger level. This may be done on the palo command line
	23	* by adding the kernel parameter "eisa_irq_edge=n,n2,[...]]", with
	24	* n and n2 as the irq levels you want to use.
	25	*
	26	* Example: "eisa_irq_edge=10,11" allows ISA cards to operate at
	27	* irq levels 10 and 11.
	28	*/
	29
	30	#include <linux/init.h>
	31	#include <linux/ioport.h>
	32	#include <linux/interrupt.h>
	33	#include <linux/kernel.h>
	34	#include <linux/module.h>
	35	#include <linux/pci.h>
1da177e4 LT	36	#include <linux/spinlock.h>
	37	#include <linux/eisa.h>
	38
	39	#include <asm/byteorder.h>
	40	#include <asm/io.h>
	41	#include <asm/hardware.h>
	42	#include <asm/processor.h>
	43	#include <asm/parisc-device.h>
	44	#include <asm/delay.h>
	45	#include <asm/eisa_bus.h>
	46	#include <asm/eisa_eeprom.h>
	47
	48	#if 0
	49	#define EISA_DBG(msg, arg... ) printk(KERN_DEBUG "eisa: " msg , ## arg )
	50	#else
	51	#define EISA_DBG(msg, arg... )
	52	#endif
	53
	54	#define SNAKES_EEPROM_BASE_ADDR 0xF0810400
	55	#define MIRAGE_EEPROM_BASE_ADDR 0xF00C0400
	56
	57	static DEFINE_SPINLOCK(eisa_irq_lock);
	58
8039de10	59	void __iomem *eisa_eeprom_addr __read_mostly;
1da177e4 LT	60
	61	/* We can only have one EISA adapter in the system because neither
	62	* implementation can be flexed.
	63	*/
	64	static struct eisa_ba {
	65	struct pci_hba_data hba;
	66	unsigned long eeprom_addr;
	67	struct eisa_root_device root;
	68	} eisa_dev;
	69
	70	/* Port ops */
	71
	72	static inline unsigned long eisa_permute(unsigned short port)
	73	{
	74	if (port & 0x300) {
	75	return 0xfc000000 \| ((port & 0xfc00) >> 6)
	76	\| ((port & 0x3f8) << 9) \| (port & 7);
	77	} else {
	78	return 0xfc000000 \| port;
	79	}
	80	}
	81
	82	unsigned char eisa_in8(unsigned short port)
	83	{
	84	if (EISA_bus)
	85	return gsc_readb(eisa_permute(port));
	86	return 0xff;
	87	}
	88
	89	unsigned short eisa_in16(unsigned short port)
	90	{
	91	if (EISA_bus)
	92	return le16_to_cpu(gsc_readw(eisa_permute(port)));
	93	return 0xffff;
	94	}
	95
	96	unsigned int eisa_in32(unsigned short port)
	97	{
	98	if (EISA_bus)
	99	return le32_to_cpu(gsc_readl(eisa_permute(port)));
	100	return 0xffffffff;
	101	}
	102
	103	void eisa_out8(unsigned char data, unsigned short port)
	104	{
	105	if (EISA_bus)
	106	gsc_writeb(data, eisa_permute(port));
	107	}
	108
	109	void eisa_out16(unsigned short data, unsigned short port)
	110	{
	111	if (EISA_bus)
	112	gsc_writew(cpu_to_le16(data), eisa_permute(port));
	113	}
	114
	115	void eisa_out32(unsigned int data, unsigned short port)
	116	{
	117	if (EISA_bus)
	118	gsc_writel(cpu_to_le32(data), eisa_permute(port));
	119	}
	120
	121	#ifndef CONFIG_PCI
	122	/* We call these directly without PCI. See asm/io.h. */
	123	EXPORT_SYMBOL(eisa_in8);
124	EXPORT_SYMBOL(eisa_in16);
125	EXPORT_SYMBOL(eisa_in32);
126	EXPORT_SYMBOL(eisa_out8);
127	EXPORT_SYMBOL(eisa_out16);
128	EXPORT_SYMBOL(eisa_out32);
129	#endif
130
131	/* Interrupt handling */
132
133	/* cached interrupt mask registers */
134	static int master_mask;
135	static int slave_mask;
136
137	/* the trig level can be set with the
138	* eisa_irq_edge=n,n,n commandline parameter
139	* We should really read this from the EEPROM
140	* in the furure.
141	*/
142	/* irq 13,8,2,1,0 must be edge */
8039de10	143	static unsigned int eisa_irq_level __read_mostly; /* default to edge triggered */
1da177e4 LT	144
	145
	146	/* called by free irq */
8ed5c00d	147	static void eisa_mask_irq(unsigned int irq)
1da177e4 LT	148	{
	149	unsigned long flags;
	150
	151	EISA_DBG("disable irq %d\n", irq);
	152	/* just mask for now */
	153	spin_lock_irqsave(&eisa_irq_lock, flags);
	154	if (irq & 8) {
	155	slave_mask \|= (1 << (irq&7));
	156	eisa_out8(slave_mask, 0xa1);
	157	} else {
	158	master_mask \|= (1 << (irq&7));
	159	eisa_out8(master_mask, 0x21);
	160	}
	161	spin_unlock_irqrestore(&eisa_irq_lock, flags);
	162	EISA_DBG("pic0 mask %02x\n", eisa_in8(0x21));
	163	EISA_DBG("pic1 mask %02x\n", eisa_in8(0xa1));
	164	}
	165
	166	/* called by request irq */
8ed5c00d	167	static void eisa_unmask_irq(unsigned int irq)
1da177e4 LT	168	{
	169	unsigned long flags;
	170	EISA_DBG("enable irq %d\n", irq);
	171
	172	spin_lock_irqsave(&eisa_irq_lock, flags);
	173	if (irq & 8) {
	174	slave_mask &= ~(1 << (irq&7));
	175	eisa_out8(slave_mask, 0xa1);
	176	} else {
	177	master_mask &= ~(1 << (irq&7));
	178	eisa_out8(master_mask, 0x21);
	179	}
	180	spin_unlock_irqrestore(&eisa_irq_lock, flags);
	181	EISA_DBG("pic0 mask %02x\n", eisa_in8(0x21));
	182	EISA_DBG("pic1 mask %02x\n", eisa_in8(0xa1));
	183	}
	184
dfe07565	185	static struct irq_chip eisa_interrupt_type = {
8ed5c00d KM	186	.name = "EISA",
	187	.unmask = eisa_unmask_irq,
	188	.mask = eisa_mask_irq,
1da177e4 LT	189	};
1da177e4 LT	190
7d12e780	191	static irqreturn_t eisa_irq(int wax_irq, void *intr_dev)
1da177e4 LT	192	{
	193	int irq = gsc_readb(0xfc01f000); /* EISA supports 16 irqs */
	194	unsigned long flags;
	195
	196	spin_lock_irqsave(&eisa_irq_lock, flags);
	197	/* read IRR command */
	198	eisa_out8(0x0a, 0x20);
	199	eisa_out8(0x0a, 0xa0);
	200
	201	EISA_DBG("irq IAR %02x 8259-1 irr %02x 8259-2 irr %02x\n",
	202	irq, eisa_in8(0x20), eisa_in8(0xa0));
	203
	204	/* read ISR command */
	205	eisa_out8(0x0a, 0x20);
	206	eisa_out8(0x0a, 0xa0);
	207	EISA_DBG("irq 8259-1 isr %02x imr %02x 8259-2 isr %02x imr %02x\n",
	208	eisa_in8(0x20), eisa_in8(0x21), eisa_in8(0xa0), eisa_in8(0xa1));
	209
	210	irq &= 0xf;
	211
	212	/* mask irq and write eoi */
	213	if (irq & 8) {
	214	slave_mask \|= (1 << (irq&7));
	215	eisa_out8(slave_mask, 0xa1);
	216	eisa_out8(0x60 \| (irq&7),0xa0);/* 'Specific EOI' to slave */
	217	eisa_out8(0x62,0x20); /* 'Specific EOI' to master-IRQ2 */
	218
	219	} else {
	220	master_mask \|= (1 << (irq&7));
	221	eisa_out8(master_mask, 0x21);
	222	eisa_out8(0x60\|irq,0x20); /* 'Specific EOI' to master */
	223	}
	224	spin_unlock_irqrestore(&eisa_irq_lock, flags);
	225
ba20085c	226	generic_handle_irq(irq);
1da177e4 LT	227
	228	spin_lock_irqsave(&eisa_irq_lock, flags);
	229	/* unmask */
	230	if (irq & 8) {
	231	slave_mask &= ~(1 << (irq&7));
	232	eisa_out8(slave_mask, 0xa1);
	233	} else {
	234	master_mask &= ~(1 << (irq&7));
	235	eisa_out8(master_mask, 0x21);
	236	}
	237	spin_unlock_irqrestore(&eisa_irq_lock, flags);
	238	return IRQ_HANDLED;
	239	}
	240
7d12e780	241	static irqreturn_t dummy_irq2_handler(int _, void *dev)
1da177e4 LT	242	{
	243	printk(KERN_ALERT "eisa: uhh, irq2?\n");
	244	return IRQ_HANDLED;
	245	}
	246
	247	static struct irqaction irq2_action = {
	248	.handler = dummy_irq2_handler,
	249	.name = "cascade",
	250	};
	251
	252	static void init_eisa_pic(void)
	253	{
	254	unsigned long flags;
	255
	256	spin_lock_irqsave(&eisa_irq_lock, flags);
	257
	258	eisa_out8(0xff, 0x21); /* mask during init */
	259	eisa_out8(0xff, 0xa1); /* mask during init */
	260
	261	/* master pic */
	262	eisa_out8(0x11,0x20); /* ICW1 */
	263	eisa_out8(0x00,0x21); /* ICW2 */
	264	eisa_out8(0x04,0x21); /* ICW3 */
	265	eisa_out8(0x01,0x21); /* ICW4 */
	266	eisa_out8(0x40,0x20); /* OCW2 */
	267
	268	/* slave pic */
	269	eisa_out8(0x11,0xa0); /* ICW1 */
	270	eisa_out8(0x08,0xa1); /* ICW2 */
	271	eisa_out8(0x02,0xa1); /* ICW3 */
	272	eisa_out8(0x01,0xa1); /* ICW4 */
	273	eisa_out8(0x40,0xa0); /* OCW2 */
	274
	275	udelay(100);
	276
	277	slave_mask = 0xff;
	278	master_mask = 0xfb;
	279	eisa_out8(slave_mask, 0xa1); /* OCW1 */
	280	eisa_out8(master_mask, 0x21); /* OCW1 */
	281
	282	/* setup trig level */
	283	EISA_DBG("EISA edge/level %04x\n", eisa_irq_level);
	284
	285	eisa_out8(eisa_irq_level&0xff, 0x4d0); /* Set all irq's to edge */
	286	eisa_out8((eisa_irq_level >> 8) & 0xff, 0x4d1);
	287
	288	EISA_DBG("pic0 mask %02x\n", eisa_in8(0x21));
	289	EISA_DBG("pic1 mask %02x\n", eisa_in8(0xa1));
	290	EISA_DBG("pic0 edge/level %02x\n", eisa_in8(0x4d0));
	291	EISA_DBG("pic1 edge/level %02x\n", eisa_in8(0x4d1));
	292
	293	spin_unlock_irqrestore(&eisa_irq_lock, flags);
	294	}
	295
	296	/* Device initialisation */
	297
	298	#define is_mongoose(dev) (dev->id.sversion == 0x00076)
	299
6fe077fd	300	static int __init eisa_probe(struct parisc_device *dev)
1da177e4 LT	301	{
	302	int i, result;
	303
	304	char *name = is_mongoose(dev) ? "Mongoose" : "Wax";
	305
	306	printk(KERN_INFO "%s EISA Adapter found at 0x%08lx\n",
c18b4608	307	name, (unsigned long)dev->hpa.start);
1da177e4 LT	308
	309	eisa_dev.hba.dev = dev;
	310	eisa_dev.hba.iommu = ccio_get_iommu(dev);
	311
	312	eisa_dev.hba.lmmio_space.name = "EISA";
	313	eisa_dev.hba.lmmio_space.start = F_EXTEND(0xfc000000);
	314	eisa_dev.hba.lmmio_space.end = F_EXTEND(0xffbfffff);
	315	eisa_dev.hba.lmmio_space.flags = IORESOURCE_MEM;
	316	result = ccio_request_resource(dev, &eisa_dev.hba.lmmio_space);
	317	if (result < 0) {
	318	printk(KERN_ERR "EISA: failed to claim EISA Bus address space!\n");
	319	return result;
	320	}
	321	eisa_dev.hba.io_space.name = "EISA";
	322	eisa_dev.hba.io_space.start = 0;
	323	eisa_dev.hba.io_space.end = 0xffff;
	324	eisa_dev.hba.lmmio_space.flags = IORESOURCE_IO;
	325	result = request_resource(&ioport_resource, &eisa_dev.hba.io_space);
	326	if (result < 0) {
	327	printk(KERN_ERR "EISA: failed to claim EISA Bus port space!\n");
	328	return result;
	329	}
	330	pcibios_register_hba(&eisa_dev.hba);
	331
8c56e721	332	result = request_irq(dev->irq, eisa_irq, IRQF_SHARED, "EISA", &eisa_dev);
1da177e4 LT	333	if (result) {
	334	printk(KERN_ERR "EISA: request_irq failed!\n");
	335	return result;
	336	}
	337
	338	/* Reserve IRQ2 */
ba20085c	339	setup_irq(2, &irq2_action);
1da177e4	340	for (i = 0; i < 16; i++) {
ba20085c	341	set_irq_chip_and_handler(i, &eisa_interrupt_type,
51890613	342	handle_simple_irq);
1da177e4 LT	343	}
	344
	345	EISA_bus = 1;
	346
	347	if (dev->num_addrs) {
	348	/* newer firmware hand out the eeprom address */
	349	eisa_dev.eeprom_addr = dev->addr[0];
	350	} else {
	351	/* old firmware, need to figure out the box */
	352	if (is_mongoose(dev)) {
	353	eisa_dev.eeprom_addr = SNAKES_EEPROM_BASE_ADDR;
	354	} else {
	355	eisa_dev.eeprom_addr = MIRAGE_EEPROM_BASE_ADDR;
	356	}
	357	}
5076c158	358	eisa_eeprom_addr = ioremap_nocache(eisa_dev.eeprom_addr, HPEE_MAX_LENGTH);
1da177e4 LT	359	result = eisa_enumerator(eisa_dev.eeprom_addr, &eisa_dev.hba.io_space,
	360	&eisa_dev.hba.lmmio_space);
	361	init_eisa_pic();
	362
	363	if (result >= 0) {
	364	/* FIXME : Don't enumerate the bus twice. */
	365	eisa_dev.root.dev = &dev->dev;
d18dbfa7	366	dev_set_drvdata(&dev->dev, &eisa_dev.root);
1da177e4 LT	367	eisa_dev.root.bus_base_addr = 0;
	368	eisa_dev.root.res = &eisa_dev.hba.io_space;
	369	eisa_dev.root.slots = result;
	370	eisa_dev.root.dma_mask = 0xffffffff; /* wild guess */
	371	if (eisa_root_register (&eisa_dev.root)) {
	372	printk(KERN_ERR "EISA: Failed to register EISA root\n");
	373	return -1;
	374	}
	375	}
	376
	377	return 0;
	378	}
	379
6fe077fd	380	static const struct parisc_device_id eisa_tbl[] = {
1da177e4 LT	381	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00076 }, /* Mongoose */
	382	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00090 }, /* Wax EISA */
	383	{ 0, }
	384	};
	385
	386	MODULE_DEVICE_TABLE(parisc, eisa_tbl);
	387
	388	static struct parisc_driver eisa_driver = {
bdad1f83	389	.name = "eisa_ba",
1da177e4 LT	390	.id_table = eisa_tbl,
	391	.probe = eisa_probe,
	392	};
	393
	394	void __init eisa_init(void)
	395	{
	396	register_parisc_driver(&eisa_driver);
	397	}
	398
	399
	400	static unsigned int eisa_irq_configured;
	401	void eisa_make_irq_level(int num)
	402	{
	403	if (eisa_irq_configured& (1<<num)) {
	404	printk(KERN_WARNING
	405	"IRQ %d polarity configured twice (last to level)\n",
	406	num);
	407	}
	408	eisa_irq_level \|= (1<<num); /* set the corresponding bit */
	409	eisa_irq_configured \|= (1<<num); /* set the corresponding bit */
	410	}
	411
	412	void eisa_make_irq_edge(int num)
	413	{
	414	if (eisa_irq_configured& (1<<num)) {
	415	printk(KERN_WARNING
	416	"IRQ %d polarity configured twice (last to edge)\n",
	417	num);
	418	}
	419	eisa_irq_level &= ~(1<<num); /* clear the corresponding bit */
	420	eisa_irq_configured \|= (1<<num); /* set the corresponding bit */
	421	}
	422
	423	static int __init eisa_irq_setup(char *str)
	424	{
	425	char *cur = str;
	426	int val;
	427
	428	EISA_DBG("IRQ setup\n");
	429	while (cur != NULL) {
	430	char *pe;
	431
	432	val = (int) simple_strtoul(cur, &pe, 0);
	433	if (val > 15 \|\| val < 0) {
	434	printk(KERN_ERR "eisa: EISA irq value are 0-15\n");
	435	continue;
	436	}
	437	if (val == 2) {
	438	val = 9;
	439	}
	440	eisa_make_irq_edge(val); /* clear the corresponding bit */
	441	EISA_DBG("setting IRQ %d to edge-triggered mode\n", val);
	442
	443	if ((cur = strchr(cur, ','))) {
	444	cur++;
	445	} else {
	446	break;
	447	}
	448	}
	449	return 1;
	450	}
	451
	452	__setup("eisa_irq_edge=", eisa_irq_setup);
	453