mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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179909ecaf
I do not think Vojtech wants snail mail these days (and he mentioned that nobody has ever sent him snail mail), and the address is not even valid anymore, so let's remove snail-mail instructions from the sources. Acked-by: Vojtech Pavlik <vojtech@suse.cz> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
170 lines
4.0 KiB
C
170 lines
4.0 KiB
C
/*
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* Copyright (c) 2000-2001 Vojtech Pavlik
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* Copyright (c) 2002 Russell King
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*/
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/*
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* Acorn RiscPC PS/2 keyboard controller driver for Linux/ARM
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*/
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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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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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/serio.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <mach/hardware.h>
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#include <asm/hardware/iomd.h>
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MODULE_AUTHOR("Vojtech Pavlik, Russell King");
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MODULE_DESCRIPTION("Acorn RiscPC PS/2 keyboard controller driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:kart");
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struct rpckbd_data {
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int tx_irq;
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int rx_irq;
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};
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static int rpckbd_write(struct serio *port, unsigned char val)
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{
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while (!(iomd_readb(IOMD_KCTRL) & (1 << 7)))
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cpu_relax();
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iomd_writeb(val, IOMD_KARTTX);
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return 0;
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}
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static irqreturn_t rpckbd_rx(int irq, void *dev_id)
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{
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struct serio *port = dev_id;
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unsigned int byte;
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int handled = IRQ_NONE;
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while (iomd_readb(IOMD_KCTRL) & (1 << 5)) {
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byte = iomd_readb(IOMD_KARTRX);
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serio_interrupt(port, byte, 0);
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handled = IRQ_HANDLED;
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}
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return handled;
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}
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static irqreturn_t rpckbd_tx(int irq, void *dev_id)
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{
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return IRQ_HANDLED;
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}
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static int rpckbd_open(struct serio *port)
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{
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struct rpckbd_data *rpckbd = port->port_data;
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/* Reset the keyboard state machine. */
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iomd_writeb(0, IOMD_KCTRL);
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iomd_writeb(8, IOMD_KCTRL);
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iomd_readb(IOMD_KARTRX);
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if (request_irq(rpckbd->rx_irq, rpckbd_rx, 0, "rpckbd", port) != 0) {
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printk(KERN_ERR "rpckbd.c: Could not allocate keyboard receive IRQ\n");
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return -EBUSY;
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}
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if (request_irq(rpckbd->tx_irq, rpckbd_tx, 0, "rpckbd", port) != 0) {
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printk(KERN_ERR "rpckbd.c: Could not allocate keyboard transmit IRQ\n");
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free_irq(rpckbd->rx_irq, port);
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return -EBUSY;
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}
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return 0;
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}
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static void rpckbd_close(struct serio *port)
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{
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struct rpckbd_data *rpckbd = port->port_data;
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free_irq(rpckbd->rx_irq, port);
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free_irq(rpckbd->tx_irq, port);
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}
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/*
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* Allocate and initialize serio structure for subsequent registration
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* with serio core.
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*/
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static int rpckbd_probe(struct platform_device *dev)
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{
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struct rpckbd_data *rpckbd;
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struct serio *serio;
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int tx_irq, rx_irq;
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rx_irq = platform_get_irq(dev, 0);
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if (rx_irq <= 0)
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return rx_irq < 0 ? rx_irq : -ENXIO;
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tx_irq = platform_get_irq(dev, 1);
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if (tx_irq <= 0)
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return tx_irq < 0 ? tx_irq : -ENXIO;
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serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
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rpckbd = kzalloc(sizeof(*rpckbd), GFP_KERNEL);
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if (!serio || !rpckbd) {
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kfree(rpckbd);
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kfree(serio);
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return -ENOMEM;
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}
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rpckbd->rx_irq = rx_irq;
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rpckbd->tx_irq = tx_irq;
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serio->id.type = SERIO_8042;
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serio->write = rpckbd_write;
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serio->open = rpckbd_open;
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serio->close = rpckbd_close;
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serio->dev.parent = &dev->dev;
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serio->port_data = rpckbd;
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strlcpy(serio->name, "RiscPC PS/2 kbd port", sizeof(serio->name));
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strlcpy(serio->phys, "rpckbd/serio0", sizeof(serio->phys));
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platform_set_drvdata(dev, serio);
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serio_register_port(serio);
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return 0;
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}
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static int rpckbd_remove(struct platform_device *dev)
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{
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struct serio *serio = platform_get_drvdata(dev);
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struct rpckbd_data *rpckbd = serio->port_data;
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serio_unregister_port(serio);
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kfree(rpckbd);
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return 0;
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}
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static struct platform_driver rpckbd_driver = {
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.probe = rpckbd_probe,
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.remove = rpckbd_remove,
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.driver = {
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.name = "kart",
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},
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};
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module_platform_driver(rpckbd_driver);
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