cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

asp.c (3415B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 *	ASP Device Driver
      4 *
      5 *	(c) Copyright 2000 The Puffin Group Inc.
      6 *
      7 *	by Helge Deller <deller@gmx.de>
      8 */
      9
     10#include <linux/errno.h>
     11#include <linux/init.h>
     12#include <linux/interrupt.h>
     13#include <linux/module.h>
     14#include <linux/types.h>
     15#include <asm/io.h>
     16#include <asm/led.h>
     17
     18#include "gsc.h"
     19
     20#define ASP_GSC_IRQ	3		/* hardcoded interrupt for GSC */
     21
     22#define ASP_VER_OFFSET 	0x20		/* offset of ASP version */
     23
     24#define ASP_LED_ADDR	0xf0800020
     25
     26#define VIPER_INT_WORD  0xFFFBF088      /* addr of viper interrupt word */
     27
     28static struct gsc_asic asp;
     29
     30static void asp_choose_irq(struct parisc_device *dev, void *ctrl)
     31{
     32	int irq;
     33
     34	switch (dev->id.sversion) {
     35	case 0x71:	irq =  9; break; /* SCSI */
     36	case 0x72:	irq =  8; break; /* LAN */
     37	case 0x73:	irq =  1; break; /* HIL */
     38	case 0x74:	irq =  7; break; /* Centronics */
     39	case 0x75:	irq = (dev->hw_path == 4) ? 5 : 6; break; /* RS232 */
     40	case 0x76:	irq = 10; break; /* EISA BA */
     41	case 0x77:	irq = 11; break; /* Graphics1 */
     42	case 0x7a:	irq = 13; break; /* Audio (Bushmaster) */
     43	case 0x7b:	irq = 13; break; /* Audio (Scorpio) */
     44	case 0x7c:	irq =  3; break; /* FW SCSI */
     45	case 0x7d:	irq =  4; break; /* FDDI */
     46	case 0x7f:	irq = 13; break; /* Audio (Outfield) */
     47	default:	return;		 /* Unknown */
     48	}
     49
     50	gsc_asic_assign_irq(ctrl, irq, &dev->irq);
     51
     52	switch (dev->id.sversion) {
     53	case 0x73:	irq =  2; break; /* i8042 High-priority */
     54	case 0x76:	irq =  0; break; /* EISA BA */
     55	default:	return;		 /* Other */
     56	}
     57
     58	gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq);
     59}
     60
     61/* There are two register ranges we're interested in.  Interrupt /
     62 * Status / LED are at 0xf080xxxx and Asp special registers are at
     63 * 0xf082fxxx.  PDC only tells us that Asp is at 0xf082f000, so for
     64 * the purposes of interrupt handling, we have to tell other bits of
     65 * the kernel to look at the other registers.
     66 */
     67#define ASP_INTERRUPT_ADDR 0xf0800000
     68
     69static int __init asp_init_chip(struct parisc_device *dev)
     70{
     71	struct gsc_irq gsc_irq;
     72	int ret;
     73
     74	asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf;
     75	asp.name = (asp.version == 1) ? "Asp" : "Cutoff";
     76	asp.hpa = ASP_INTERRUPT_ADDR;
     77
     78	printk(KERN_INFO "%s version %d at 0x%lx found.\n", 
     79		asp.name, asp.version, (unsigned long)dev->hpa.start);
     80
     81	/* the IRQ ASP should use */
     82	ret = -EBUSY;
     83	dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
     84	if (dev->irq < 0) {
     85		printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__);
     86		goto out;
     87	}
     88
     89	asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
     90
     91	ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp);
     92	if (ret < 0)
     93		goto out;
     94
     95	/* Program VIPER to interrupt on the ASP irq */
     96	gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);
     97
     98	/* Done init'ing, register this driver */
     99	ret = gsc_common_setup(dev, &asp);
    100	if (ret)
    101		goto out;
    102
    103	gsc_fixup_irqs(dev, &asp, asp_choose_irq);
    104	/* Mongoose is a sibling of Asp, not a child... */
    105	gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq);
    106
    107	/* initialize the chassis LEDs */ 
    108#ifdef CONFIG_CHASSIS_LCD_LED	
    109	register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE, 
    110		    ASP_LED_ADDR);
    111#endif
    112
    113 out:
    114	return ret;
    115}
    116
    117static const struct parisc_device_id asp_tbl[] __initconst = {
    118	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },
    119	{ 0, }
    120};
    121
    122struct parisc_driver asp_driver __refdata = {
    123	.name =		"asp",
    124	.id_table =	asp_tbl,
    125	.probe =	asp_init_chip,
    126};