Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/input/serio/pcips2.c |
| 3 | * |
| 4 | * Copyright (C) 2003 Russell King, All Rights Reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License. |
| 9 | * |
| 10 | * I'm not sure if this is a generic PS/2 PCI interface or specific to |
| 11 | * the Mobility Electronics docking station. |
| 12 | */ |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/interrupt.h> |
| 15 | #include <linux/ioport.h> |
| 16 | #include <linux/input.h> |
| 17 | #include <linux/pci.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 18 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/init.h> |
| 20 | #include <linux/serio.h> |
| 21 | #include <linux/delay.h> |
| 22 | #include <asm/io.h> |
| 23 | |
| 24 | #define PS2_CTRL (0) |
| 25 | #define PS2_STATUS (1) |
| 26 | #define PS2_DATA (2) |
| 27 | |
| 28 | #define PS2_CTRL_CLK (1<<0) |
| 29 | #define PS2_CTRL_DAT (1<<1) |
| 30 | #define PS2_CTRL_TXIRQ (1<<2) |
| 31 | #define PS2_CTRL_ENABLE (1<<3) |
| 32 | #define PS2_CTRL_RXIRQ (1<<4) |
| 33 | |
| 34 | #define PS2_STAT_CLK (1<<0) |
| 35 | #define PS2_STAT_DAT (1<<1) |
| 36 | #define PS2_STAT_PARITY (1<<2) |
| 37 | #define PS2_STAT_RXFULL (1<<5) |
| 38 | #define PS2_STAT_TXBUSY (1<<6) |
| 39 | #define PS2_STAT_TXEMPTY (1<<7) |
| 40 | |
| 41 | struct pcips2_data { |
| 42 | struct serio *io; |
| 43 | unsigned int base; |
| 44 | struct pci_dev *dev; |
| 45 | }; |
| 46 | |
| 47 | static int pcips2_write(struct serio *io, unsigned char val) |
| 48 | { |
| 49 | struct pcips2_data *ps2if = io->port_data; |
| 50 | unsigned int stat; |
| 51 | |
| 52 | do { |
| 53 | stat = inb(ps2if->base + PS2_STATUS); |
| 54 | cpu_relax(); |
| 55 | } while (!(stat & PS2_STAT_TXEMPTY)); |
| 56 | |
| 57 | outb(val, ps2if->base + PS2_DATA); |
| 58 | |
| 59 | return 0; |
| 60 | } |
| 61 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 62 | static irqreturn_t pcips2_interrupt(int irq, void *devid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | { |
| 64 | struct pcips2_data *ps2if = devid; |
| 65 | unsigned char status, scancode; |
| 66 | int handled = 0; |
| 67 | |
| 68 | do { |
| 69 | unsigned int flag; |
| 70 | |
| 71 | status = inb(ps2if->base + PS2_STATUS); |
| 72 | if (!(status & PS2_STAT_RXFULL)) |
| 73 | break; |
| 74 | handled = 1; |
| 75 | scancode = inb(ps2if->base + PS2_DATA); |
| 76 | if (status == 0xff && scancode == 0xff) |
| 77 | break; |
| 78 | |
| 79 | flag = (status & PS2_STAT_PARITY) ? 0 : SERIO_PARITY; |
| 80 | |
| 81 | if (hweight8(scancode) & 1) |
| 82 | flag ^= SERIO_PARITY; |
| 83 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 84 | serio_interrupt(ps2if->io, scancode, flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | } while (1); |
| 86 | return IRQ_RETVAL(handled); |
| 87 | } |
| 88 | |
| 89 | static void pcips2_flush_input(struct pcips2_data *ps2if) |
| 90 | { |
| 91 | unsigned char status, scancode; |
| 92 | |
| 93 | do { |
| 94 | status = inb(ps2if->base + PS2_STATUS); |
| 95 | if (!(status & PS2_STAT_RXFULL)) |
| 96 | break; |
| 97 | scancode = inb(ps2if->base + PS2_DATA); |
| 98 | if (status == 0xff && scancode == 0xff) |
| 99 | break; |
| 100 | } while (1); |
| 101 | } |
| 102 | |
| 103 | static int pcips2_open(struct serio *io) |
| 104 | { |
| 105 | struct pcips2_data *ps2if = io->port_data; |
| 106 | int ret, val = 0; |
| 107 | |
| 108 | outb(PS2_CTRL_ENABLE, ps2if->base); |
| 109 | pcips2_flush_input(ps2if); |
| 110 | |
Thomas Gleixner | dace145 | 2006-07-01 19:29:38 -0700 | [diff] [blame] | 111 | ret = request_irq(ps2if->dev->irq, pcips2_interrupt, IRQF_SHARED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | "pcips2", ps2if); |
| 113 | if (ret == 0) |
| 114 | val = PS2_CTRL_ENABLE | PS2_CTRL_RXIRQ; |
| 115 | |
| 116 | outb(val, ps2if->base); |
| 117 | |
| 118 | return ret; |
| 119 | } |
| 120 | |
| 121 | static void pcips2_close(struct serio *io) |
| 122 | { |
| 123 | struct pcips2_data *ps2if = io->port_data; |
| 124 | |
| 125 | outb(0, ps2if->base); |
| 126 | |
| 127 | free_irq(ps2if->dev->irq, ps2if); |
| 128 | } |
| 129 | |
| 130 | static int __devinit pcips2_probe(struct pci_dev *dev, const struct pci_device_id *id) |
| 131 | { |
| 132 | struct pcips2_data *ps2if; |
| 133 | struct serio *serio; |
| 134 | int ret; |
| 135 | |
| 136 | ret = pci_enable_device(dev); |
| 137 | if (ret) |
| 138 | goto out; |
| 139 | |
| 140 | ret = pci_request_regions(dev, "pcips2"); |
| 141 | if (ret) |
| 142 | goto disable; |
| 143 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 144 | ps2if = kzalloc(sizeof(struct pcips2_data), GFP_KERNEL); |
| 145 | serio = kzalloc(sizeof(struct serio), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | if (!ps2if || !serio) { |
| 147 | ret = -ENOMEM; |
| 148 | goto release; |
| 149 | } |
| 150 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
| 152 | serio->id.type = SERIO_8042; |
| 153 | serio->write = pcips2_write; |
| 154 | serio->open = pcips2_open; |
| 155 | serio->close = pcips2_close; |
| 156 | strlcpy(serio->name, pci_name(dev), sizeof(serio->name)); |
Kay Sievers | a6c2490 | 2008-10-30 00:07:50 -0400 | [diff] [blame] | 157 | strlcpy(serio->phys, dev_name(&dev->dev), sizeof(serio->phys)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | serio->port_data = ps2if; |
| 159 | serio->dev.parent = &dev->dev; |
| 160 | ps2if->io = serio; |
| 161 | ps2if->dev = dev; |
| 162 | ps2if->base = pci_resource_start(dev, 0); |
| 163 | |
| 164 | pci_set_drvdata(dev, ps2if); |
| 165 | |
| 166 | serio_register_port(ps2if->io); |
| 167 | return 0; |
| 168 | |
| 169 | release: |
| 170 | kfree(ps2if); |
| 171 | kfree(serio); |
| 172 | pci_release_regions(dev); |
| 173 | disable: |
| 174 | pci_disable_device(dev); |
| 175 | out: |
| 176 | return ret; |
| 177 | } |
| 178 | |
| 179 | static void __devexit pcips2_remove(struct pci_dev *dev) |
| 180 | { |
| 181 | struct pcips2_data *ps2if = pci_get_drvdata(dev); |
| 182 | |
| 183 | serio_unregister_port(ps2if->io); |
| 184 | pci_set_drvdata(dev, NULL); |
| 185 | kfree(ps2if); |
| 186 | pci_release_regions(dev); |
| 187 | pci_disable_device(dev); |
| 188 | } |
| 189 | |
Márton Németh | a9844b1 | 2010-01-09 23:23:58 -0800 | [diff] [blame] | 190 | static const struct pci_device_id pcips2_ids[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | { |
| 192 | .vendor = 0x14f2, /* MOBILITY */ |
| 193 | .device = 0x0123, /* Keyboard */ |
| 194 | .subvendor = PCI_ANY_ID, |
| 195 | .subdevice = PCI_ANY_ID, |
| 196 | .class = PCI_CLASS_INPUT_KEYBOARD << 8, |
| 197 | .class_mask = 0xffff00, |
| 198 | }, |
| 199 | { |
| 200 | .vendor = 0x14f2, /* MOBILITY */ |
| 201 | .device = 0x0124, /* Mouse */ |
| 202 | .subvendor = PCI_ANY_ID, |
| 203 | .subdevice = PCI_ANY_ID, |
| 204 | .class = PCI_CLASS_INPUT_MOUSE << 8, |
| 205 | .class_mask = 0xffff00, |
| 206 | }, |
| 207 | { 0, } |
| 208 | }; |
Axel Lin | 5d06647 | 2012-04-21 23:37:53 -0700 | [diff] [blame] | 209 | MODULE_DEVICE_TABLE(pci, pcips2_ids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
| 211 | static struct pci_driver pcips2_driver = { |
| 212 | .name = "pcips2", |
| 213 | .id_table = pcips2_ids, |
| 214 | .probe = pcips2_probe, |
| 215 | .remove = __devexit_p(pcips2_remove), |
| 216 | }; |
| 217 | |
Axel Lin | 5d06647 | 2012-04-21 23:37:53 -0700 | [diff] [blame] | 218 | module_pci_driver(pcips2_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
| 220 | MODULE_LICENSE("GPL"); |
| 221 | MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); |
| 222 | MODULE_DESCRIPTION("PCI PS/2 keyboard/mouse driver"); |