Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / input / serio / rpckbd.c

diff --git a/kernel/drivers/input/serio/rpckbd.c b/kernel/drivers/input/serio/rpckbd.c
new file mode 100644 (file)
index 0000000..8cf9647
--- /dev/null
+++ b/kernel/drivers/input/serio/rpckbd.c
@@ -0,0 +1,173 @@
+/*
+ *  Copyright (c) 2000-2001 Vojtech Pavlik
+ *  Copyright (c) 2002 Russell King
+ */
+
+/*
+ * Acorn RiscPC PS/2 keyboard controller driver for Linux/ARM
+ */
+
+/*
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Should you need to contact me, the author, you can do so either by
+ * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
+ * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/serio.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+
+#include <mach/hardware.h>
+#include <asm/hardware/iomd.h>
+
+MODULE_AUTHOR("Vojtech Pavlik, Russell King");
+MODULE_DESCRIPTION("Acorn RiscPC PS/2 keyboard controller driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:kart");
+
+struct rpckbd_data {
+       int tx_irq;
+       int rx_irq;
+};
+
+static int rpckbd_write(struct serio *port, unsigned char val)
+{
+       while (!(iomd_readb(IOMD_KCTRL) & (1 << 7)))
+               cpu_relax();
+
+       iomd_writeb(val, IOMD_KARTTX);
+
+       return 0;
+}
+
+static irqreturn_t rpckbd_rx(int irq, void *dev_id)
+{
+       struct serio *port = dev_id;
+       unsigned int byte;
+       int handled = IRQ_NONE;
+
+       while (iomd_readb(IOMD_KCTRL) & (1 << 5)) {
+               byte = iomd_readb(IOMD_KARTRX);
+
+               serio_interrupt(port, byte, 0);
+               handled = IRQ_HANDLED;
+       }
+       return handled;
+}
+
+static irqreturn_t rpckbd_tx(int irq, void *dev_id)
+{
+       return IRQ_HANDLED;
+}
+
+static int rpckbd_open(struct serio *port)
+{
+       struct rpckbd_data *rpckbd = port->port_data;
+
+       /* Reset the keyboard state machine. */
+       iomd_writeb(0, IOMD_KCTRL);
+       iomd_writeb(8, IOMD_KCTRL);
+       iomd_readb(IOMD_KARTRX);
+
+       if (request_irq(rpckbd->rx_irq, rpckbd_rx, 0, "rpckbd", port) != 0) {
+               printk(KERN_ERR "rpckbd.c: Could not allocate keyboard receive IRQ\n");
+               return -EBUSY;
+       }
+
+       if (request_irq(rpckbd->tx_irq, rpckbd_tx, 0, "rpckbd", port) != 0) {
+               printk(KERN_ERR "rpckbd.c: Could not allocate keyboard transmit IRQ\n");
+               free_irq(rpckbd->rx_irq, port);
+               return -EBUSY;
+       }
+
+       return 0;
+}
+
+static void rpckbd_close(struct serio *port)
+{
+       struct rpckbd_data *rpckbd = port->port_data;
+
+       free_irq(rpckbd->rx_irq, port);
+       free_irq(rpckbd->tx_irq, port);
+}
+
+/*
+ * Allocate and initialize serio structure for subsequent registration
+ * with serio core.
+ */
+static int rpckbd_probe(struct platform_device *dev)
+{
+       struct rpckbd_data *rpckbd;
+       struct serio *serio;
+       int tx_irq, rx_irq;
+
+       rx_irq = platform_get_irq(dev, 0);
+       if (rx_irq <= 0)
+               return rx_irq < 0 ? rx_irq : -ENXIO;
+
+       tx_irq = platform_get_irq(dev, 1);
+       if (tx_irq <= 0)
+               return tx_irq < 0 ? tx_irq : -ENXIO;
+
+       serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
+       rpckbd = kzalloc(sizeof(*rpckbd), GFP_KERNEL);
+       if (!serio || !rpckbd) {
+               kfree(rpckbd);
+               kfree(serio);
+               return -ENOMEM;
+       }
+
+       rpckbd->rx_irq = rx_irq;
+       rpckbd->tx_irq = tx_irq;
+
+       serio->id.type          = SERIO_8042;
+       serio->write            = rpckbd_write;
+       serio->open             = rpckbd_open;
+       serio->close            = rpckbd_close;
+       serio->dev.parent       = &dev->dev;
+       serio->port_data        = rpckbd;
+       strlcpy(serio->name, "RiscPC PS/2 kbd port", sizeof(serio->name));
+       strlcpy(serio->phys, "rpckbd/serio0", sizeof(serio->phys));
+
+       platform_set_drvdata(dev, serio);
+       serio_register_port(serio);
+       return 0;
+}
+
+static int rpckbd_remove(struct platform_device *dev)
+{
+       struct serio *serio = platform_get_drvdata(dev);
+       struct rpckbd_data *rpckbd = serio->port_data;
+
+       serio_unregister_port(serio);
+       kfree(rpckbd);
+
+       return 0;
+}
+
+static struct platform_driver rpckbd_driver = {
+       .probe          = rpckbd_probe,
+       .remove         = rpckbd_remove,
+       .driver         = {
+               .name   = "kart",
+       },
+};
+module_platform_driver(rpckbd_driver);