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v6.8
  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *  Copyright (c) 2000-2001 Vojtech Pavlik
  4 *  Copyright (c) 2002 Russell King
  5 */
  6
  7/*
  8 * Acorn RiscPC PS/2 keyboard controller driver for Linux/ARM
  9 */
 10
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 11#include <linux/module.h>
 12#include <linux/interrupt.h>
 13#include <linux/serio.h>
 14#include <linux/err.h>
 15#include <linux/platform_device.h>
 16#include <linux/io.h>
 17#include <linux/slab.h>
 18
 19#include <mach/hardware.h>
 20#include <asm/hardware/iomd.h>
 21
 22MODULE_AUTHOR("Vojtech Pavlik, Russell King");
 23MODULE_DESCRIPTION("Acorn RiscPC PS/2 keyboard controller driver");
 24MODULE_LICENSE("GPL");
 25MODULE_ALIAS("platform:kart");
 26
 27struct rpckbd_data {
 28	int tx_irq;
 29	int rx_irq;
 30};
 31
 32static int rpckbd_write(struct serio *port, unsigned char val)
 33{
 34	while (!(iomd_readb(IOMD_KCTRL) & (1 << 7)))
 35		cpu_relax();
 36
 37	iomd_writeb(val, IOMD_KARTTX);
 38
 39	return 0;
 40}
 41
 42static irqreturn_t rpckbd_rx(int irq, void *dev_id)
 43{
 44	struct serio *port = dev_id;
 45	unsigned int byte;
 46	int handled = IRQ_NONE;
 47
 48	while (iomd_readb(IOMD_KCTRL) & (1 << 5)) {
 49		byte = iomd_readb(IOMD_KARTRX);
 50
 51		serio_interrupt(port, byte, 0);
 52		handled = IRQ_HANDLED;
 53	}
 54	return handled;
 55}
 56
 57static irqreturn_t rpckbd_tx(int irq, void *dev_id)
 58{
 59	return IRQ_HANDLED;
 60}
 61
 62static int rpckbd_open(struct serio *port)
 63{
 64	struct rpckbd_data *rpckbd = port->port_data;
 65
 66	/* Reset the keyboard state machine. */
 67	iomd_writeb(0, IOMD_KCTRL);
 68	iomd_writeb(8, IOMD_KCTRL);
 69	iomd_readb(IOMD_KARTRX);
 70
 71	if (request_irq(rpckbd->rx_irq, rpckbd_rx, 0, "rpckbd", port) != 0) {
 72		printk(KERN_ERR "rpckbd.c: Could not allocate keyboard receive IRQ\n");
 73		return -EBUSY;
 74	}
 75
 76	if (request_irq(rpckbd->tx_irq, rpckbd_tx, 0, "rpckbd", port) != 0) {
 77		printk(KERN_ERR "rpckbd.c: Could not allocate keyboard transmit IRQ\n");
 78		free_irq(rpckbd->rx_irq, port);
 79		return -EBUSY;
 80	}
 81
 82	return 0;
 83}
 84
 85static void rpckbd_close(struct serio *port)
 86{
 87	struct rpckbd_data *rpckbd = port->port_data;
 88
 89	free_irq(rpckbd->rx_irq, port);
 90	free_irq(rpckbd->tx_irq, port);
 91}
 92
 93/*
 94 * Allocate and initialize serio structure for subsequent registration
 95 * with serio core.
 96 */
 97static int rpckbd_probe(struct platform_device *dev)
 98{
 99	struct rpckbd_data *rpckbd;
100	struct serio *serio;
101	int tx_irq, rx_irq;
102
103	rx_irq = platform_get_irq(dev, 0);
104	if (rx_irq < 0)
105		return rx_irq;
106
107	tx_irq = platform_get_irq(dev, 1);
108	if (tx_irq < 0)
109		return tx_irq;
110
111	serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
112	rpckbd = kzalloc(sizeof(*rpckbd), GFP_KERNEL);
113	if (!serio || !rpckbd) {
114		kfree(rpckbd);
115		kfree(serio);
116		return -ENOMEM;
117	}
118
119	rpckbd->rx_irq = rx_irq;
120	rpckbd->tx_irq = tx_irq;
121
122	serio->id.type		= SERIO_8042;
123	serio->write		= rpckbd_write;
124	serio->open		= rpckbd_open;
125	serio->close		= rpckbd_close;
126	serio->dev.parent	= &dev->dev;
127	serio->port_data	= rpckbd;
128	strscpy(serio->name, "RiscPC PS/2 kbd port", sizeof(serio->name));
129	strscpy(serio->phys, "rpckbd/serio0", sizeof(serio->phys));
130
131	platform_set_drvdata(dev, serio);
132	serio_register_port(serio);
133	return 0;
134}
135
136static void rpckbd_remove(struct platform_device *dev)
137{
138	struct serio *serio = platform_get_drvdata(dev);
139	struct rpckbd_data *rpckbd = serio->port_data;
140
141	serio_unregister_port(serio);
142	kfree(rpckbd);
 
 
143}
144
145static struct platform_driver rpckbd_driver = {
146	.probe		= rpckbd_probe,
147	.remove_new	= rpckbd_remove,
148	.driver		= {
149		.name	= "kart",
150	},
151};
152module_platform_driver(rpckbd_driver);
v4.10.11
 
  1/*
  2 *  Copyright (c) 2000-2001 Vojtech Pavlik
  3 *  Copyright (c) 2002 Russell King
  4 */
  5
  6/*
  7 * Acorn RiscPC PS/2 keyboard controller driver for Linux/ARM
  8 */
  9
 10/*
 11 * This program is free software; you can redistribute it and/or modify
 12 * it under the terms of the GNU General Public License as published by
 13 * the Free Software Foundation; either version 2 of the License, or
 14 * (at your option) any later version.
 15 *
 16 * This program is distributed in the hope that it will be useful,
 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 19 * GNU General Public License for more details.
 20 *
 21 * You should have received a copy of the GNU General Public License
 22 * along with this program; if not, write to the Free Software
 23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 24 *
 25 * Should you need to contact me, the author, you can do so either by
 26 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 27 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 28 */
 29
 30#include <linux/module.h>
 31#include <linux/interrupt.h>
 32#include <linux/serio.h>
 33#include <linux/err.h>
 34#include <linux/platform_device.h>
 35#include <linux/io.h>
 36#include <linux/slab.h>
 37
 38#include <mach/hardware.h>
 39#include <asm/hardware/iomd.h>
 40
 41MODULE_AUTHOR("Vojtech Pavlik, Russell King");
 42MODULE_DESCRIPTION("Acorn RiscPC PS/2 keyboard controller driver");
 43MODULE_LICENSE("GPL");
 44MODULE_ALIAS("platform:kart");
 45
 46struct rpckbd_data {
 47	int tx_irq;
 48	int rx_irq;
 49};
 50
 51static int rpckbd_write(struct serio *port, unsigned char val)
 52{
 53	while (!(iomd_readb(IOMD_KCTRL) & (1 << 7)))
 54		cpu_relax();
 55
 56	iomd_writeb(val, IOMD_KARTTX);
 57
 58	return 0;
 59}
 60
 61static irqreturn_t rpckbd_rx(int irq, void *dev_id)
 62{
 63	struct serio *port = dev_id;
 64	unsigned int byte;
 65	int handled = IRQ_NONE;
 66
 67	while (iomd_readb(IOMD_KCTRL) & (1 << 5)) {
 68		byte = iomd_readb(IOMD_KARTRX);
 69
 70		serio_interrupt(port, byte, 0);
 71		handled = IRQ_HANDLED;
 72	}
 73	return handled;
 74}
 75
 76static irqreturn_t rpckbd_tx(int irq, void *dev_id)
 77{
 78	return IRQ_HANDLED;
 79}
 80
 81static int rpckbd_open(struct serio *port)
 82{
 83	struct rpckbd_data *rpckbd = port->port_data;
 84
 85	/* Reset the keyboard state machine. */
 86	iomd_writeb(0, IOMD_KCTRL);
 87	iomd_writeb(8, IOMD_KCTRL);
 88	iomd_readb(IOMD_KARTRX);
 89
 90	if (request_irq(rpckbd->rx_irq, rpckbd_rx, 0, "rpckbd", port) != 0) {
 91		printk(KERN_ERR "rpckbd.c: Could not allocate keyboard receive IRQ\n");
 92		return -EBUSY;
 93	}
 94
 95	if (request_irq(rpckbd->tx_irq, rpckbd_tx, 0, "rpckbd", port) != 0) {
 96		printk(KERN_ERR "rpckbd.c: Could not allocate keyboard transmit IRQ\n");
 97		free_irq(rpckbd->rx_irq, port);
 98		return -EBUSY;
 99	}
100
101	return 0;
102}
103
104static void rpckbd_close(struct serio *port)
105{
106	struct rpckbd_data *rpckbd = port->port_data;
107
108	free_irq(rpckbd->rx_irq, port);
109	free_irq(rpckbd->tx_irq, port);
110}
111
112/*
113 * Allocate and initialize serio structure for subsequent registration
114 * with serio core.
115 */
116static int rpckbd_probe(struct platform_device *dev)
117{
118	struct rpckbd_data *rpckbd;
119	struct serio *serio;
120	int tx_irq, rx_irq;
121
122	rx_irq = platform_get_irq(dev, 0);
123	if (rx_irq <= 0)
124		return rx_irq < 0 ? rx_irq : -ENXIO;
125
126	tx_irq = platform_get_irq(dev, 1);
127	if (tx_irq <= 0)
128		return tx_irq < 0 ? tx_irq : -ENXIO;
129
130	serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
131	rpckbd = kzalloc(sizeof(*rpckbd), GFP_KERNEL);
132	if (!serio || !rpckbd) {
133		kfree(rpckbd);
134		kfree(serio);
135		return -ENOMEM;
136	}
137
138	rpckbd->rx_irq = rx_irq;
139	rpckbd->tx_irq = tx_irq;
140
141	serio->id.type		= SERIO_8042;
142	serio->write		= rpckbd_write;
143	serio->open		= rpckbd_open;
144	serio->close		= rpckbd_close;
145	serio->dev.parent	= &dev->dev;
146	serio->port_data	= rpckbd;
147	strlcpy(serio->name, "RiscPC PS/2 kbd port", sizeof(serio->name));
148	strlcpy(serio->phys, "rpckbd/serio0", sizeof(serio->phys));
149
150	platform_set_drvdata(dev, serio);
151	serio_register_port(serio);
152	return 0;
153}
154
155static int rpckbd_remove(struct platform_device *dev)
156{
157	struct serio *serio = platform_get_drvdata(dev);
158	struct rpckbd_data *rpckbd = serio->port_data;
159
160	serio_unregister_port(serio);
161	kfree(rpckbd);
162
163	return 0;
164}
165
166static struct platform_driver rpckbd_driver = {
167	.probe		= rpckbd_probe,
168	.remove		= rpckbd_remove,
169	.driver		= {
170		.name	= "kart",
171	},
172};
173module_platform_driver(rpckbd_driver);