--- /dev/null
+/*
+ * 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,
+};
Code Review / kvmfornfv.git / blobdiff