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134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* ASP Device Driver
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*
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* (c) Copyright 2000 The Puffin Group Inc.
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*
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* (c) 2000-2023 by Helge Deller <deller@gmx.de>
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*/
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <asm/io.h>
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#include <asm/led.h>
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#include "gsc.h"
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#define ASP_GSC_IRQ 3 /* hardcoded interrupt for GSC */
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#define ASP_VER_OFFSET 0x20 /* offset of ASP version */
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#define ASP_LED_ADDR 0xf0800020
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#define VIPER_INT_WORD 0xFFFBF088 /* addr of viper interrupt word */
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static struct gsc_asic asp;
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static void asp_choose_irq(struct parisc_device *dev, void *ctrl)
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{
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int irq;
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switch (dev->id.sversion) {
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case 0x71: irq = 9; break; /* SCSI */
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case 0x72: irq = 8; break; /* LAN */
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case 0x73: irq = 1; break; /* HIL */
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case 0x74: irq = 7; break; /* Centronics */
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case 0x75: irq = (dev->hw_path == 4) ? 5 : 6; break; /* RS232 */
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case 0x76: irq = 10; break; /* EISA BA */
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case 0x77: irq = 11; break; /* Graphics1 */
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case 0x7a: irq = 13; break; /* Audio (Bushmaster) */
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case 0x7b: irq = 13; break; /* Audio (Scorpio) */
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case 0x7c: irq = 3; break; /* FW SCSI */
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case 0x7d: irq = 4; break; /* FDDI */
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case 0x7f: irq = 13; break; /* Audio (Outfield) */
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default: return; /* Unknown */
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}
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gsc_asic_assign_irq(ctrl, irq, &dev->irq);
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switch (dev->id.sversion) {
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case 0x73: irq = 2; break; /* i8042 High-priority */
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case 0x76: irq = 0; break; /* EISA BA */
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default: return; /* Other */
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}
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gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq);
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}
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/* There are two register ranges we're interested in. Interrupt /
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* Status / LED are at 0xf080xxxx and Asp special registers are at
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* 0xf082fxxx. PDC only tells us that Asp is at 0xf082f000, so for
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* the purposes of interrupt handling, we have to tell other bits of
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* the kernel to look at the other registers.
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*/
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#define ASP_INTERRUPT_ADDR 0xf0800000
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static int __init asp_init_chip(struct parisc_device *dev)
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{
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struct gsc_irq gsc_irq;
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int ret;
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asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf;
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asp.name = (asp.version == 1) ? "Asp" : "Cutoff";
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asp.hpa = ASP_INTERRUPT_ADDR;
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printk(KERN_INFO "%s version %d at 0x%lx found.\n",
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asp.name, asp.version, (unsigned long)dev->hpa.start);
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/* the IRQ ASP should use */
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ret = -EBUSY;
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dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
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if (dev->irq < 0) {
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printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__);
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goto out;
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}
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asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
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ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp);
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if (ret < 0)
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goto out;
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/* Program VIPER to interrupt on the ASP irq */
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gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);
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/* Done init'ing, register this driver */
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ret = gsc_common_setup(dev, &asp);
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if (ret)
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goto out;
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gsc_fixup_irqs(dev, &asp, asp_choose_irq);
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/* Mongoose is a sibling of Asp, not a child... */
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gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq);
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/* initialize the chassis LEDs */
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#ifdef CONFIG_CHASSIS_LCD_LED
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register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE,
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ASP_LED_ADDR);
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#endif
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out:
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return ret;
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}
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static const struct parisc_device_id asp_tbl[] __initconst = {
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{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },
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{ 0, }
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};
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MODULE_DEVICE_TABLE(parisc, asp_tbl);
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static struct parisc_driver asp_driver __refdata = {
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.name = "asp",
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.id_table = asp_tbl,
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.probe = asp_init_chip,
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};
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static int __init asp_init(void)
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{
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return register_parisc_driver(&asp_driver);
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}
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arch_initcall(asp_init);
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