1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * eisa.c - provide support for EISA adapters in PA-RISC machines
10  * Wax ASIC also includes a PS/2 and RS-232 controller, but those are
15  * -----
17  * set an edge trigger level. This may be done on the palo command line
38 #include <asm/parisc-device.h>
67 /* Port ops */
69 static inline unsigned long eisa_permute(unsigned short port)  in eisa_permute()  argument
71 	if (port & 0x300) {  in eisa_permute()
72 		return 0xfc000000 | ((port & 0xfc00) >> 6)  in eisa_permute()
73 			| ((port & 0x3f8) << 9) | (port & 7);  in eisa_permute()
75 		return 0xfc000000 | port;  in eisa_permute()
79 unsigned char eisa_in8(unsigned short port)  in eisa_in8()  argument
82 		return gsc_readb(eisa_permute(port));  in eisa_in8()
86 unsigned short eisa_in16(unsigned short port)  in eisa_in16()  argument
89 		return le16_to_cpu(gsc_readw(eisa_permute(port)));  in eisa_in16()
93 unsigned int eisa_in32(unsigned short port)  in eisa_in32()  argument
96 		return le32_to_cpu(gsc_readl(eisa_permute(port)));  in eisa_in32()
100 void eisa_out8(unsigned char data, unsigned short port)  in eisa_out8()  argument
103 		gsc_writeb(data, eisa_permute(port));  in eisa_out8()
106 void eisa_out16(unsigned short data, unsigned short port)  in eisa_out16()  argument
109 		gsc_writew(cpu_to_le16(data), eisa_permute(port));  in eisa_out16()
112 void eisa_out32(unsigned int data, unsigned short port)  in eisa_out32()  argument
115 		gsc_writel(cpu_to_le32(data), eisa_permute(port));  in eisa_out32()
134 /* the trig level can be set with the
146 	unsigned int irq = d->irq;  in eisa_mask_irq()
167 	unsigned int irq = d->irq;  in eisa_unmask_irq()
200 	EISA_DBG("irq IAR %02x 8259-1 irr %02x 8259-2 irr %02x\n",  in eisa_irq()
206 	EISA_DBG("irq 8259-1 isr %02x imr %02x 8259-2 isr %02x imr %02x\n",  in eisa_irq()
216 		eisa_out8(0x62, 0x20);	/* 'Specific EOI' to master-IRQ2 */  in eisa_irq()
276 	/* setup trig level */  in init_eisa_pic()
277 	EISA_DBG("EISA edge/level %04x\n", eisa_irq_level);  in init_eisa_pic()
284 	EISA_DBG("pic0 edge/level %02x\n", eisa_in8(0x4d0));  in init_eisa_pic()
285 	EISA_DBG("pic1 edge/level %02x\n", eisa_in8(0x4d1));  in init_eisa_pic()
292 #define is_mongoose(dev) (dev->id.sversion == 0x00076)
301 		name, (unsigned long)dev->hpa.start);  in eisa_probe()
321 		printk(KERN_ERR "EISA: failed to claim EISA Bus port space!\n");  in eisa_probe()
326 	result = request_irq(dev->irq, eisa_irq, IRQF_SHARED, "EISA", &eisa_dev);  in eisa_probe()
342 	if (dev->num_addrs) {  in eisa_probe()
344 		eisa_dev.eeprom_addr = dev->addr[0];  in eisa_probe()
355 		result = -ENOMEM;  in eisa_probe()
365 		eisa_dev.root.dev = &dev->dev;  in eisa_probe()
366 		dev_set_drvdata(&dev->dev, &eisa_dev.root);  in eisa_probe()
373 			result = -ENOMEM;  in eisa_probe()
383 	free_irq(dev->irq, &eisa_dev);  in eisa_probe()
415 		       "IRQ %d polarity configured twice (last to level)\n",  in eisa_make_irq_level()
444 			printk(KERN_ERR "eisa: EISA irq value are 0-15\n");  in eisa_irq_setup()
451 		EISA_DBG("setting IRQ %d to edge-triggered mode\n", val);  in eisa_irq_setup()