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126 lines
3.3 KiB
126 lines
3.3 KiB
// 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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* by Helge Deller <[email protected]> |
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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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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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