asp.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:3k
- /*
- * ASP Device Driver
- *
- * (c) Copyright 2000 The Puffin Group Inc.
- *
- * 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.
- *
- * by Helge Deller <deller@gmx.de>
- */
- #include <linux/errno.h>
- #include <linux/init.h>
- #include <linux/irq.h>
- #include <linux/module.h>
- #include <linux/slab.h>
- #include <linux/types.h>
- #include <asm/gsc.h>
- #include <asm/led.h>
- #include "busdevice.h"
- #define ASP_GSC_IRQ 3 /* hardcoded interrupt for GSC */
- #define ASP_VER_OFFSET 0x20 /* offset of ASP version */
- #define ASP_LED_ADDR 0xf0800020
- #define VIPER_INT_WORD 0xFFFBF088 /* addr of viper interrupt word */
- static int asp_choose_irq(struct parisc_device *dev)
- {
- int irq = -1;
- switch (dev->id.sversion) {
- case 0x71: irq = 22; break; /* SCSI */
- case 0x72: irq = 23; break; /* LAN */
- case 0x73: irq = 30; break; /* HIL */
- case 0x74: irq = 24; break; /* Centronics */
- case 0x75: irq = (dev->hw_path == 4) ? 26 : 25; break; /* RS232 */
- case 0x76: irq = 21; break; /* EISA BA */
- case 0x77: irq = 20; break; /* Graphics1 */
- case 0x7a: irq = 18; break; /* Audio (Bushmaster) */
- case 0x7b: irq = 18; break; /* Audio (Scorpio) */
- case 0x7c: irq = 28; break; /* FW SCSI */
- case 0x7d: irq = 27; break; /* FDDI */
- case 0x7f: irq = 18; break; /* Audio (Outfield) */
- }
- return irq;
- }
- /* There are two register ranges we're interested in. Interrupt /
- * Status / LED are at 0xf080xxxx and Asp special registers are at
- * 0xf082fxxx. PDC only tells us that Asp is at 0xf082f000, so for
- * the purposes of interrupt handling, we have to tell other bits of
- * the kernel to look at the other registers.
- */
- #define ASP_INTERRUPT_ADDR 0xf0800000
- int __init
- asp_init_chip(struct parisc_device *dev)
- {
- struct busdevice *asp;
- struct gsc_irq gsc_irq;
- int irq, ret;
- asp = kmalloc(sizeof(struct busdevice), GFP_KERNEL);
- if(!asp)
- return -ENOMEM;
- asp->version = gsc_readb(dev->hpa + ASP_VER_OFFSET) & 0xf;
- asp->name = (asp->version == 1) ? "Asp" : "Cutoff";
- asp->hpa = ASP_INTERRUPT_ADDR;
- printk(KERN_INFO "%s version %d at 0x%lx found.n",
- asp->name, asp->version, dev->hpa);
- /* the IRQ ASP should use */
- ret = -EBUSY;
- irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
- if (irq < 0) {
- printk(KERN_ERR "%s(): cannot get GSC irqn", __FUNCTION__);
- goto out;
- }
- ret = request_irq(gsc_irq.irq, busdev_barked, 0, "asp", asp);
- if (ret < 0)
- goto out;
- /* Save this for debugging later */
- asp->parent_irq = gsc_irq.irq;
- asp->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
- /* Program VIPER to interrupt on the ASP irq */
- gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);
- /* Done init'ing, register this driver */
- ret = gsc_common_irqsetup(dev, asp);
- if (ret)
- goto out;
- fixup_child_irqs(dev, asp->busdev_region->data.irqbase, asp_choose_irq);
- /* Mongoose is a sibling of Asp, not a child... */
- fixup_child_irqs(dev->parent, asp->busdev_region->data.irqbase,
- asp_choose_irq);
- /* initialize the chassis LEDs */
- #ifdef CONFIG_CHASSIS_LCD_LED
- register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE,
- (char *)ASP_LED_ADDR);
- #endif
- return 0;
- out:
- kfree(asp);
- return ret;
- }
- static struct parisc_device_id asp_tbl[] = {
- { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },
- { 0, }
- };
- struct parisc_driver asp_driver = {
- name: "Asp",
- id_table: asp_tbl,
- probe: asp_init_chip,
- };