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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 | /* * 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/init.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", .owner = THIS_MODULE, }, }; module_platform_driver(rpckbd_driver); |