/* * Generic linux-input device driver for keyboard devices * * Copyright (c) 2001 Brian S. Julin * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL"). * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * * References: * HP-HIL Technical Reference Manual. Hewlett Packard Product No. 45918A * */ #include <linux/hil.h> #include <linux/input.h> #include <linux/serio.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/pci_ids.h> #define PREFIX "HIL KEYB: " #define HIL_GENERIC_NAME "HIL keyboard" MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>"); MODULE_DESCRIPTION(HIL_GENERIC_NAME " driver"); MODULE_LICENSE("Dual BSD/GPL"); #define HIL_KBD_MAX_LENGTH 16 #define HIL_KBD_SET1_UPBIT 0x01 #define HIL_KBD_SET1_SHIFT 1 static unsigned int hil_kbd_set1[HIL_KEYCODES_SET1_TBLSIZE] = { HIL_KEYCODES_SET1 }; #define HIL_KBD_SET2_UPBIT 0x01 #define HIL_KBD_SET2_SHIFT 1 /* Set2 is user defined */ #define HIL_KBD_SET3_UPBIT 0x80 #define HIL_KBD_SET3_SHIFT 0 static unsigned int hil_kbd_set3[HIL_KEYCODES_SET3_TBLSIZE] = { HIL_KEYCODES_SET3 }; static char hil_language[][16] = { HIL_LOCALE_MAP }; struct hil_kbd { struct input_dev *dev; struct serio *serio; /* Input buffer and index for packets from HIL bus. */ hil_packet data[HIL_KBD_MAX_LENGTH]; int idx4; /* four counts per packet */ /* Raw device info records from HIL bus, see hil.h for fields. */ char idd[HIL_KBD_MAX_LENGTH]; /* DID byte and IDD record */ char rsc[HIL_KBD_MAX_LENGTH]; /* RSC record */ char exd[HIL_KBD_MAX_LENGTH]; /* EXD record */ char rnm[HIL_KBD_MAX_LENGTH + 1]; /* RNM record + NULL term. */ /* Something to sleep around with. */ struct semaphore sem; }; /* Process a complete packet after transfer from the HIL */ static void hil_kbd_process_record(struct hil_kbd *kbd) { struct input_dev *dev = kbd->dev; hil_packet *data = kbd->data; hil_packet p; int idx, i, cnt; idx = kbd->idx4/4; p = data[idx - 1]; if ((p & ~HIL_CMDCT_POL) == (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL)) goto report; if ((p & ~HIL_CMDCT_RPL) == (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL)) goto report; /* Not a poll response. See if we are loading config records. */ switch (p & HIL_PKT_DATA_MASK) { case HIL_CMD_IDD: for (i = 0; i < idx; i++) kbd->idd[i] = kbd->data[i] & HIL_PKT_DATA_MASK; for (; i < HIL_KBD_MAX_LENGTH; i++) kbd->idd[i] = 0; break; case HIL_CMD_RSC: for (i = 0; i < idx; i++) kbd->rsc[i] = kbd->data[i] & HIL_PKT_DATA_MASK; for (; i < HIL_KBD_MAX_LENGTH; i++) kbd->rsc[i] = 0; break; case HIL_CMD_EXD: for (i = 0; i < idx; i++) kbd->exd[i] = kbd->data[i] & HIL_PKT_DATA_MASK; for (; i < HIL_KBD_MAX_LENGTH; i++) kbd->exd[i] = 0; break; case HIL_CMD_RNM: for (i = 0; i < idx; i++) kbd->rnm[i] = kbd->data[i] & HIL_PKT_DATA_MASK; for (; i < HIL_KBD_MAX_LENGTH + 1; i++) kbd->rnm[i] = '\0'; break; default: /* These occur when device isn't present */ if (p == (HIL_ERR_INT | HIL_PKT_CMD)) break; /* Anything else we'd like to know about. */ printk(KERN_WARNING PREFIX "Device sent unknown record %x\n", p); break; } goto out; report: cnt = 1; switch (kbd->data[0] & HIL_POL_CHARTYPE_MASK) { case HIL_POL_CHARTYPE_NONE: break; case HIL_POL_CHARTYPE_ASCII: while (cnt < idx - 1) input_report_key(dev, kbd->data[cnt++] & 0x7f, 1); break; case HIL_POL_CHARTYPE_RSVD1: case HIL_POL_CHARTYPE_RSVD2: case HIL_POL_CHARTYPE_BINARY: while (cnt < idx - 1) input_report_key(dev, kbd->data[cnt++], 1); break; case HIL_POL_CHARTYPE_SET1: while (cnt < idx - 1) { unsigned int key; int up; key = kbd->data[cnt++]; up = key & HIL_KBD_SET1_UPBIT; key &= (~HIL_KBD_SET1_UPBIT & 0xff); key = hil_kbd_set1[key >> HIL_KBD_SET1_SHIFT]; if (key != KEY_RESERVED) input_report_key(dev, key, !up); } break; case HIL_POL_CHARTYPE_SET2: while (cnt < idx - 1) { unsigned int key; int up; key = kbd->data[cnt++]; up = key & HIL_KBD_SET2_UPBIT; key &= (~HIL_KBD_SET1_UPBIT & 0xff); key = key >> HIL_KBD_SET2_SHIFT; if (key != KEY_RESERVED) input_report_key(dev, key, !up); } break; case HIL_POL_CHARTYPE_SET3: while (cnt < idx - 1) { unsigned int key; int up; key = kbd->data[cnt++]; up = key & HIL_KBD_SET3_UPBIT; key &= (~HIL_KBD_SET1_UPBIT & 0xff); key = hil_kbd_set3[key >> HIL_KBD_SET3_SHIFT]; if (key != KEY_RESERVED) input_report_key(dev, key, !up); } break; } out: kbd->idx4 = 0; up(&kbd->sem); } static void hil_kbd_process_err(struct hil_kbd *kbd) { printk(KERN_WARNING PREFIX "errored HIL packet\n"); kbd->idx4 = 0; up(&kbd->sem); } static irqreturn_t hil_kbd_interrupt(struct serio *serio, unsigned char data, unsigned int flags, struct pt_regs *regs) { struct hil_kbd *kbd; hil_packet packet; int idx; kbd = serio_get_drvdata(serio); if (kbd == NULL) { BUG(); return IRQ_HANDLED; } if (kbd->idx4 >= (HIL_KBD_MAX_LENGTH * sizeof(hil_packet))) { hil_kbd_process_err(kbd); return IRQ_HANDLED; } idx = kbd->idx4/4; if (!(kbd->idx4 % 4)) kbd->data[idx] = 0; packet = kbd->data[idx]; packet |= ((hil_packet)data) << ((3 - (kbd->idx4 % 4)) * 8); kbd->data[idx] = packet; /* Records of N 4-byte hil_packets must terminate with a command. */ if ((++(kbd->idx4)) % 4) return IRQ_HANDLED; if ((packet & 0xffff0000) != HIL_ERR_INT) { hil_kbd_process_err(kbd); return IRQ_HANDLED; } if (packet & HIL_PKT_CMD) hil_kbd_process_record(kbd); return IRQ_HANDLED; } static void hil_kbd_disconnect(struct serio *serio) { struct hil_kbd *kbd; kbd = serio_get_drvdata(serio); if (kbd == NULL) { BUG(); return; } serio_close(serio); input_unregister_device(kbd->dev); kfree(kbd); } static int hil_kbd_connect(struct serio *serio, struct serio_driver *drv) { struct hil_kbd *kbd; uint8_t did, *idd; int i; kbd = kzalloc(sizeof(*kbd), GFP_KERNEL); if (!kbd) return -ENOMEM; kbd->dev = input_allocate_device(); if (!kbd->dev) goto bail0; kbd->dev->private = kbd; if (serio_open(serio, drv)) goto bail1; serio_set_drvdata(serio, kbd); kbd->serio = serio; init_MUTEX_LOCKED(&(kbd->sem)); /* Get device info. MLC driver supplies devid/status/etc. */ serio->write(serio, 0); serio->write(serio, 0); serio->write(serio, HIL_PKT_CMD >> 8); serio->write(serio, HIL_CMD_IDD); down(&(kbd->sem)); serio->write(serio, 0); serio->write(serio, 0); serio->write(serio, HIL_PKT_CMD >> 8); serio->write(serio, HIL_CMD_RSC); down(&(kbd->sem)); serio->write(serio, 0); serio->write(serio, 0); serio->write(serio, HIL_PKT_CMD >> 8); serio->write(serio, HIL_CMD_RNM); down(&(kbd->sem)); serio->write(serio, 0); serio->write(serio, 0); serio->write(serio, HIL_PKT_CMD >> 8); serio->write(serio, HIL_CMD_EXD); down(&(kbd->sem)); up(&(kbd->sem)); did = kbd->idd[0]; idd = kbd->idd + 1; switch (did & HIL_IDD_DID_TYPE_MASK) { case HIL_IDD_DID_TYPE_KB_INTEGRAL: case HIL_IDD_DID_TYPE_KB_ITF: case HIL_IDD_DID_TYPE_KB_RSVD: case HIL_IDD_DID_TYPE_CHAR: printk(KERN_INFO PREFIX "HIL keyboard found (did = 0x%02x, lang = %s)\n", did, hil_language[did & HIL_IDD_DID_TYPE_KB_LANG_MASK]); break; default: goto bail2; } if(HIL_IDD_NUM_BUTTONS(idd) || HIL_IDD_NUM_AXES_PER_SET(*idd)) { printk(KERN_INFO PREFIX "keyboards only, no combo devices supported.\n"); goto bail2; } kbd->dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP); kbd->dev->ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL); kbd->dev->keycodemax = HIL_KEYCODES_SET1_TBLSIZE; kbd->dev->keycodesize = sizeof(hil_kbd_set1[0]); kbd->dev->keycode = hil_kbd_set1; kbd->dev->name = strlen(kbd->rnm) ? kbd->rnm : HIL_GENERIC_NAME; kbd->dev->phys = "hpkbd/input0"; /* XXX */ kbd->dev->id.bustype = BUS_HIL; kbd->dev->id.vendor = PCI_VENDOR_ID_HP; kbd->dev->id.product = 0x0001; /* TODO: get from kbd->rsc */ kbd->dev->id.version = 0x0100; /* TODO: get from kbd->rsc */ kbd->dev->dev = &serio->dev; for (i = 0; i < 128; i++) { set_bit(hil_kbd_set1[i], kbd->dev->keybit); set_bit(hil_kbd_set3[i], kbd->dev->keybit); } clear_bit(0, kbd->dev->keybit); input_register_device(kbd->dev); printk(KERN_INFO "input: %s, ID: %d\n", kbd->dev->name, did); serio->write(serio, 0); serio->write(serio, 0); serio->write(serio, HIL_PKT_CMD >> 8); serio->write(serio, HIL_CMD_EK1); /* Enable Keyswitch Autorepeat 1 */ down(&(kbd->sem)); up(&(kbd->sem)); return 0; bail2: serio_close(serio); serio_set_drvdata(serio, NULL); bail1: input_free_device(kbd->dev); bail0: kfree(kbd); return -EIO; } static struct serio_device_id hil_kbd_ids[] = { { .type = SERIO_HIL_MLC, .proto = SERIO_HIL, .id = SERIO_ANY, .extra = SERIO_ANY, }, { 0 } }; struct serio_driver hil_kbd_serio_drv = { .driver = { .name = "hil_kbd", }, .description = "HP HIL keyboard driver", .id_table = hil_kbd_ids, .connect = hil_kbd_connect, .disconnect = hil_kbd_disconnect, .interrupt = hil_kbd_interrupt }; static int __init hil_kbd_init(void) { serio_register_driver(&hil_kbd_serio_drv); return 0; } static void __exit hil_kbd_exit(void) { serio_unregister_driver(&hil_kbd_serio_drv); } module_init(hil_kbd_init); module_exit(hil_kbd_exit);