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84a14ae8c4
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 24 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528170026.162703968@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
217 lines
4.6 KiB
C
217 lines
4.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* linux/drivers/input/serio/pcips2.c
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*
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* Copyright (C) 2003 Russell King, All Rights Reserved.
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*
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* I'm not sure if this is a generic PS/2 PCI interface or specific to
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* the Mobility Electronics docking station.
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*/
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/input.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/serio.h>
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#include <linux/delay.h>
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#include <asm/io.h>
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#define PS2_CTRL (0)
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#define PS2_STATUS (1)
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#define PS2_DATA (2)
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#define PS2_CTRL_CLK (1<<0)
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#define PS2_CTRL_DAT (1<<1)
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#define PS2_CTRL_TXIRQ (1<<2)
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#define PS2_CTRL_ENABLE (1<<3)
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#define PS2_CTRL_RXIRQ (1<<4)
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#define PS2_STAT_CLK (1<<0)
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#define PS2_STAT_DAT (1<<1)
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#define PS2_STAT_PARITY (1<<2)
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#define PS2_STAT_RXFULL (1<<5)
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#define PS2_STAT_TXBUSY (1<<6)
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#define PS2_STAT_TXEMPTY (1<<7)
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struct pcips2_data {
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struct serio *io;
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unsigned int base;
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struct pci_dev *dev;
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};
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static int pcips2_write(struct serio *io, unsigned char val)
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{
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struct pcips2_data *ps2if = io->port_data;
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unsigned int stat;
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do {
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stat = inb(ps2if->base + PS2_STATUS);
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cpu_relax();
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} while (!(stat & PS2_STAT_TXEMPTY));
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outb(val, ps2if->base + PS2_DATA);
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return 0;
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}
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static irqreturn_t pcips2_interrupt(int irq, void *devid)
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{
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struct pcips2_data *ps2if = devid;
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unsigned char status, scancode;
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int handled = 0;
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do {
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unsigned int flag;
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status = inb(ps2if->base + PS2_STATUS);
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if (!(status & PS2_STAT_RXFULL))
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break;
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handled = 1;
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scancode = inb(ps2if->base + PS2_DATA);
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if (status == 0xff && scancode == 0xff)
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break;
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flag = (status & PS2_STAT_PARITY) ? 0 : SERIO_PARITY;
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if (hweight8(scancode) & 1)
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flag ^= SERIO_PARITY;
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serio_interrupt(ps2if->io, scancode, flag);
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} while (1);
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return IRQ_RETVAL(handled);
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}
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static void pcips2_flush_input(struct pcips2_data *ps2if)
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{
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unsigned char status, scancode;
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do {
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status = inb(ps2if->base + PS2_STATUS);
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if (!(status & PS2_STAT_RXFULL))
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break;
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scancode = inb(ps2if->base + PS2_DATA);
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if (status == 0xff && scancode == 0xff)
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break;
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} while (1);
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}
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static int pcips2_open(struct serio *io)
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{
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struct pcips2_data *ps2if = io->port_data;
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int ret, val = 0;
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outb(PS2_CTRL_ENABLE, ps2if->base);
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pcips2_flush_input(ps2if);
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ret = request_irq(ps2if->dev->irq, pcips2_interrupt, IRQF_SHARED,
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"pcips2", ps2if);
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if (ret == 0)
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val = PS2_CTRL_ENABLE | PS2_CTRL_RXIRQ;
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outb(val, ps2if->base);
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return ret;
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}
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static void pcips2_close(struct serio *io)
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{
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struct pcips2_data *ps2if = io->port_data;
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outb(0, ps2if->base);
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free_irq(ps2if->dev->irq, ps2if);
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}
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static int pcips2_probe(struct pci_dev *dev, const struct pci_device_id *id)
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{
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struct pcips2_data *ps2if;
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struct serio *serio;
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int ret;
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ret = pci_enable_device(dev);
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if (ret)
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goto out;
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ret = pci_request_regions(dev, "pcips2");
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if (ret)
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goto disable;
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ps2if = kzalloc(sizeof(struct pcips2_data), GFP_KERNEL);
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serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
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if (!ps2if || !serio) {
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ret = -ENOMEM;
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goto release;
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}
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serio->id.type = SERIO_8042;
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serio->write = pcips2_write;
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serio->open = pcips2_open;
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serio->close = pcips2_close;
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strlcpy(serio->name, pci_name(dev), sizeof(serio->name));
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strlcpy(serio->phys, dev_name(&dev->dev), sizeof(serio->phys));
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serio->port_data = ps2if;
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serio->dev.parent = &dev->dev;
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ps2if->io = serio;
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ps2if->dev = dev;
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ps2if->base = pci_resource_start(dev, 0);
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pci_set_drvdata(dev, ps2if);
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serio_register_port(ps2if->io);
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return 0;
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release:
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kfree(ps2if);
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kfree(serio);
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pci_release_regions(dev);
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disable:
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pci_disable_device(dev);
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out:
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return ret;
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}
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static void pcips2_remove(struct pci_dev *dev)
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{
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struct pcips2_data *ps2if = pci_get_drvdata(dev);
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serio_unregister_port(ps2if->io);
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kfree(ps2if);
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pci_release_regions(dev);
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pci_disable_device(dev);
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}
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static const struct pci_device_id pcips2_ids[] = {
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{
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.vendor = 0x14f2, /* MOBILITY */
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.device = 0x0123, /* Keyboard */
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID,
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.class = PCI_CLASS_INPUT_KEYBOARD << 8,
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.class_mask = 0xffff00,
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},
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{
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.vendor = 0x14f2, /* MOBILITY */
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.device = 0x0124, /* Mouse */
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID,
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.class = PCI_CLASS_INPUT_MOUSE << 8,
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.class_mask = 0xffff00,
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},
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{ 0, }
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};
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MODULE_DEVICE_TABLE(pci, pcips2_ids);
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static struct pci_driver pcips2_driver = {
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.name = "pcips2",
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.id_table = pcips2_ids,
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.probe = pcips2_probe,
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.remove = pcips2_remove,
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};
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module_pci_driver(pcips2_driver);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
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MODULE_DESCRIPTION("PCI PS/2 keyboard/mouse driver");
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