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