- 根目录:
- drivers
- parisc
- lasi.c
/*
* LASI Device Driver
*
* (c) Copyright 1999 Red Hat Software
* Portions (c) Copyright 1999 The Puffin Group Inc.
* Portions (c) Copyright 1999 Hewlett-Packard
*
* 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 Alan Cox <alan@redhat.com> and
* Alex deVries <alex@onefishtwo.ca>
*/
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/types.h>
#include <asm/io.h>
#include <asm/hardware.h>
#include <asm/led.h>
#include "gsc.h"
#define LASI_VER 0xC008 /* LASI Version */
#define LASI_IO_CONF 0x7FFFE /* LASI primary configuration register */
#define LASI_IO_CONF2 0x7FFFF /* LASI secondary configuration register */
static void lasi_choose_irq(struct parisc_device *dev, void *ctrl)
{
int irq;
switch (dev->id.sversion) {
case 0x74: irq = 7; break; /* Centronics */
case 0x7B: irq = 13; break; /* Audio */
case 0x81: irq = 14; break; /* Lasi itself */
case 0x82: irq = 9; break; /* SCSI */
case 0x83: irq = 20; break; /* Floppy */
case 0x84: irq = 26; break; /* PS/2 Keyboard */
case 0x87: irq = 18; break; /* ISDN */
case 0x8A: irq = 8; break; /* LAN */
case 0x8C: irq = 5; break; /* RS232 */
case 0x8D: irq = (dev->hw_path == 13) ? 16 : 17; break;
/* Telephone */
default: return; /* unknown */
}
gsc_asic_assign_irq(ctrl, irq, &dev->irq);
}
static void __init
lasi_init_irq(struct gsc_asic *this_lasi)
{
unsigned long lasi_base = this_lasi->hpa;
/* Stop LASI barking for a bit */
gsc_writel(0x00000000, lasi_base+OFFSET_IMR);
/* clear pending interrupts */
gsc_readl(lasi_base+OFFSET_IRR);
/* We're not really convinced we want to reset the onboard
* devices. Firmware does it for us...
*/
/* Resets */
/* gsc_writel(0xFFFFFFFF, lasi_base+0x2000);*/ /* Parallel */
if(pdc_add_valid(lasi_base+0x4004) == PDC_OK)
gsc_writel(0xFFFFFFFF, lasi_base+0x4004); /* Audio */
/* gsc_writel(0xFFFFFFFF, lasi_base+0x5000);*/ /* Serial */
/* gsc_writel(0xFFFFFFFF, lasi_base+0x6000);*/ /* SCSI */
gsc_writel(0xFFFFFFFF, lasi_base+0x7000); /* LAN */
gsc_writel(0xFFFFFFFF, lasi_base+0x8000); /* Keyboard */
gsc_writel(0xFFFFFFFF, lasi_base+0xA000); /* FDC */
/* Ok we hit it on the head with a hammer, our Dog is now
** comatose and muzzled. Devices will now unmask LASI
** interrupts as they are registered as irq's in the LASI range.
*/
/* XXX: I thought it was `awks that got `it on the `ead with an
* `ammer. -- willy
*/
}
/*
** lasi_led_init()
**
** lasi_led_init() initializes the LED controller on the LASI.
**
** Since Mirage and Electra machines use a different LED
** address register, we need to check for these machines
** explicitly.
*/
#ifndef CONFIG_CHASSIS_LCD_LED
#define lasi_led_init(x) /* nothing */
#else
static void __init lasi_led_init(unsigned long lasi_hpa)
{
unsigned long datareg;
switch (CPU_HVERSION) {
/* Gecko machines have only one single LED, which can be permanently
turned on by writing a zero into the power control register. */
case 0x600: /* Gecko (712/60) */
case 0x601: /* Gecko (712/80) */
case 0x602: /* Gecko (712/100) */
case 0x603: /* Anole 64 (743/64) */
case 0x604: /* Anole 100 (743/100) */
case 0x605: /* Gecko (712/120) */
datareg = lasi_hpa + 0x0000C000;
gsc_writeb(0, datareg);
return; /* no need to register the LED interrupt-function */
/* Mirage and Electra machines need special offsets */
case 0x60A: /* Mirage Jr (715/64) */
case 0x60B: /* Mirage 100 */
case 0x60C: /* Mirage 100+ */
case 0x60D: /* Electra 100 */
case 0x60E: /* Electra 120 */
datareg = lasi_hpa - 0x00020000;
break;
default:
datareg = lasi_hpa + 0x0000C000;
break;
}
register_led_driver(DISPLAY_MODEL_LASI, LED_CMD_REG_NONE, datareg);
}
#endif
/*
* lasi_power_off
*
* Function for lasi to turn off the power. This is accomplished by setting a
* 1 to PWR_ON_L in the Power Control Register
*
*/
static unsigned long lasi_power_off_hpa __read_mostly;
static void lasi_power_off(void)
{
unsigned long datareg;
/* calculate addr of the Power Control Register */
datareg = lasi_power_off_hpa + 0x0000C000;
/* Power down the machine */
gsc_writel(0x02, datareg);
}
static int __init lasi_init_chip(struct parisc_device *dev)
{
extern void (*chassis_power_off)(void);
struct gsc_asic *lasi;
struct gsc_irq gsc_irq;
int ret;
lasi = kzalloc(sizeof(*lasi), GFP_KERNEL);
if (!lasi)
return -ENOMEM;
lasi->name = "Lasi";
lasi->hpa = dev->hpa.start;
/* Check the 4-bit (yes, only 4) version register */
lasi->version = gsc_readl(lasi->hpa + LASI_VER) & 0xf;
printk(KERN_INFO "%s version %d at 0x%lx found.\n",
lasi->name, lasi->version, lasi->hpa);
/* initialize the chassis LEDs really early */
lasi_led_init(lasi->hpa);
/* Stop LASI barking for a bit */
lasi_init_irq(lasi);
/* the IRQ lasi should use */
dev->irq = gsc_alloc_irq(&gsc_irq);
if (dev->irq < 0) {
printk(KERN_ERR "%s(): cannot get GSC irq\n",
__func__);
kfree(lasi);
return -EBUSY;
}
lasi->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "lasi", lasi);
if (ret < 0) {
kfree(lasi);
return ret;
}
/* enable IRQ's for devices below LASI */
gsc_writel(lasi->eim, lasi->hpa + OFFSET_IAR);
/* Done init'ing, register this driver */
ret = gsc_common_setup(dev, lasi);
if (ret) {
kfree(lasi);
return ret;
}
gsc_fixup_irqs(dev, lasi, lasi_choose_irq);
/* initialize the power off function */
/* FIXME: Record the LASI HPA for the power off function. This should
* ensure that only the first LASI (the one controlling the power off)
* should set the HPA here */
lasi_power_off_hpa = lasi->hpa;
chassis_power_off = lasi_power_off;
return ret;
}
static struct parisc_device_id lasi_tbl[] = {
{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00081 },
{ 0, }
};
struct parisc_driver lasi_driver = {
.name = "lasi",
.id_table = lasi_tbl,
.probe = lasi_init_chip,
};