diff options
Diffstat (limited to 'drivers/input/mouse/hil_ptr.c')
| -rw-r--r-- | drivers/input/mouse/hil_ptr.c | 414 |
1 files changed, 414 insertions, 0 deletions
diff --git a/drivers/input/mouse/hil_ptr.c b/drivers/input/mouse/hil_ptr.c new file mode 100644 index 00000000000..bc22849c6c7 --- /dev/null +++ b/drivers/input/mouse/hil_ptr.c @@ -0,0 +1,414 @@ +/* + * Generic linux-input device driver for axis-bearing 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 PTR: " +#define HIL_GENERIC_NAME "HIL pointer device" + +MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>"); +MODULE_DESCRIPTION(HIL_GENERIC_NAME " driver"); +MODULE_LICENSE("Dual BSD/GPL"); + + +#define TABLET_SIMULATES_MOUSE /* allow tablet to be used as mouse */ +#undef TABLET_AUTOADJUST /* auto-adjust valid tablet ranges */ + + +#define HIL_PTR_MAX_LENGTH 16 + +struct hil_ptr { + struct input_dev dev; + struct serio *serio; + + /* Input buffer and index for packets from HIL bus. */ + hil_packet data[HIL_PTR_MAX_LENGTH]; + int idx4; /* four counts per packet */ + + /* Raw device info records from HIL bus, see hil.h for fields. */ + char idd[HIL_PTR_MAX_LENGTH]; /* DID byte and IDD record */ + char rsc[HIL_PTR_MAX_LENGTH]; /* RSC record */ + char exd[HIL_PTR_MAX_LENGTH]; /* EXD record */ + char rnm[HIL_PTR_MAX_LENGTH + 1]; /* RNM record + NULL term. */ + + /* Extra device details not contained in struct input_dev. */ + unsigned int nbtn, naxes; + unsigned int btnmap[7]; + + /* Something to sleep around with. */ + struct semaphore sem; +}; + +/* Process a complete packet after transfer from the HIL */ +static void hil_ptr_process_record(struct hil_ptr *ptr) +{ + struct input_dev *dev = &ptr->dev; + hil_packet *data = ptr->data; + hil_packet p; + int idx, i, cnt, laxis; + int ax16, absdev; + + idx = ptr->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++) + ptr->idd[i] = ptr->data[i] & HIL_PKT_DATA_MASK; + for (; i < HIL_PTR_MAX_LENGTH; i++) + ptr->idd[i] = 0; + break; + case HIL_CMD_RSC: + for (i = 0; i < idx; i++) + ptr->rsc[i] = ptr->data[i] & HIL_PKT_DATA_MASK; + for (; i < HIL_PTR_MAX_LENGTH; i++) + ptr->rsc[i] = 0; + break; + case HIL_CMD_EXD: + for (i = 0; i < idx; i++) + ptr->exd[i] = ptr->data[i] & HIL_PKT_DATA_MASK; + for (; i < HIL_PTR_MAX_LENGTH; i++) + ptr->exd[i] = 0; + break; + case HIL_CMD_RNM: + for (i = 0; i < idx; i++) + ptr->rnm[i] = ptr->data[i] & HIL_PKT_DATA_MASK; + for (; i < HIL_PTR_MAX_LENGTH + 1; i++) + ptr->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: + if ((p & HIL_CMDCT_POL) != idx - 1) { + printk(KERN_WARNING PREFIX "Malformed poll packet %x (idx = %i)\n", p, idx); + goto out; + } + + i = (ptr->data[0] & HIL_POL_AXIS_ALT) ? 3 : 0; + laxis = ptr->data[0] & HIL_POL_NUM_AXES_MASK; + laxis += i; + + ax16 = ptr->idd[1] & HIL_IDD_HEADER_16BIT; /* 8 or 16bit resolution */ + absdev = ptr->idd[1] & HIL_IDD_HEADER_ABS; + + for (cnt = 1; i < laxis; i++) { + unsigned int lo,hi,val; + lo = ptr->data[cnt++] & HIL_PKT_DATA_MASK; + hi = ax16 ? (ptr->data[cnt++] & HIL_PKT_DATA_MASK) : 0; + if (absdev) { + val = lo + (hi<<8); +#ifdef TABLET_AUTOADJUST + if (val < ptr->dev.absmin[ABS_X + i]) + ptr->dev.absmin[ABS_X + i] = val; + if (val > ptr->dev.absmax[ABS_X + i]) + ptr->dev.absmax[ABS_X + i] = val; +#endif + if (i%3) val = ptr->dev.absmax[ABS_X + i] - val; + input_report_abs(dev, ABS_X + i, val); + } else { + val = (int) (((int8_t)lo) | ((int8_t)hi<<8)); + if (i%3) val *= -1; + input_report_rel(dev, REL_X + i, val); + } + } + + while (cnt < idx - 1) { + unsigned int btn; + int up; + btn = ptr->data[cnt++]; + up = btn & 1; + btn &= 0xfe; + if (btn == 0x8e) { + continue; /* TODO: proximity == touch? */ + } + else if ((btn > 0x8c) || (btn < 0x80)) continue; + btn = (btn - 0x80) >> 1; + btn = ptr->btnmap[btn]; + input_report_key(dev, btn, !up); + } + input_sync(dev); + out: + ptr->idx4 = 0; + up(&ptr->sem); +} + +static void hil_ptr_process_err(struct hil_ptr *ptr) { + printk(KERN_WARNING PREFIX "errored HIL packet\n"); + ptr->idx4 = 0; + up(&ptr->sem); + return; +} + +static irqreturn_t hil_ptr_interrupt(struct serio *serio, + unsigned char data, unsigned int flags, struct pt_regs *regs) +{ + struct hil_ptr *ptr; + hil_packet packet; + int idx; + + ptr = (struct hil_ptr *)serio->private; + if (ptr == NULL) { + BUG(); + return IRQ_HANDLED; + } + + if (ptr->idx4 >= (HIL_PTR_MAX_LENGTH * sizeof(hil_packet))) { + hil_ptr_process_err(ptr); + return IRQ_HANDLED; + } + idx = ptr->idx4/4; + if (!(ptr->idx4 % 4)) ptr->data[idx] = 0; + packet = ptr->data[idx]; + packet |= ((hil_packet)data) << ((3 - (ptr->idx4 % 4)) * 8); + ptr->data[idx] = packet; + + /* Records of N 4-byte hil_packets must terminate with a command. */ + if ((++(ptr->idx4)) % 4) return IRQ_HANDLED; + if ((packet & 0xffff0000) != HIL_ERR_INT) { + hil_ptr_process_err(ptr); + return IRQ_HANDLED; + } + if (packet & HIL_PKT_CMD) + hil_ptr_process_record(ptr); + return IRQ_HANDLED; +} + +static void hil_ptr_disconnect(struct serio *serio) +{ + struct hil_ptr *ptr; + + ptr = (struct hil_ptr *)serio->private; + if (ptr == NULL) { + BUG(); + return; + } + + input_unregister_device(&ptr->dev); + serio_close(serio); + kfree(ptr); +} + +static void hil_ptr_connect(struct serio *serio, struct serio_driver *driver) +{ + struct hil_ptr *ptr; + char *txt; + unsigned int i, naxsets, btntype; + uint8_t did, *idd; + + if (serio->type != (SERIO_HIL_MLC | SERIO_HIL)) return; + + if (!(ptr = kmalloc(sizeof(struct hil_ptr), GFP_KERNEL))) return; + memset(ptr, 0, sizeof(struct hil_ptr)); + + if (serio_open(serio, driver)) goto bail0; + + serio->private = ptr; + ptr->serio = serio; + ptr->dev.private = ptr; + + init_MUTEX_LOCKED(&(ptr->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(&(ptr->sem)); + + serio->write(serio, 0); + serio->write(serio, 0); + serio->write(serio, HIL_PKT_CMD >> 8); + serio->write(serio, HIL_CMD_RSC); + down(&(ptr->sem)); + + serio->write(serio, 0); + serio->write(serio, 0); + serio->write(serio, HIL_PKT_CMD >> 8); + serio->write(serio, HIL_CMD_RNM); + down(&(ptr->sem)); + + serio->write(serio, 0); + serio->write(serio, 0); + serio->write(serio, HIL_PKT_CMD >> 8); + serio->write(serio, HIL_CMD_EXD); + down(&(ptr->sem)); + + up(&(ptr->sem)); + + init_input_dev(&ptr->dev); + did = ptr->idd[0]; + idd = ptr->idd + 1; + txt = "unknown"; + if ((did & HIL_IDD_DID_TYPE_MASK) == HIL_IDD_DID_TYPE_REL) { + ptr->dev.evbit[0] = BIT(EV_REL); + txt = "relative"; + } + + if ((did & HIL_IDD_DID_TYPE_MASK) == HIL_IDD_DID_TYPE_ABS) { + ptr->dev.evbit[0] = BIT(EV_ABS); + txt = "absolute"; + } + if (!ptr->dev.evbit[0]) { + goto bail1; + } + + ptr->nbtn = HIL_IDD_NUM_BUTTONS(idd); + if (ptr->nbtn) ptr->dev.evbit[0] |= BIT(EV_KEY); + + naxsets = HIL_IDD_NUM_AXSETS(*idd); + ptr->naxes = HIL_IDD_NUM_AXES_PER_SET(*idd); + + printk(KERN_INFO PREFIX "HIL pointer device found (did: 0x%02x, axis: %s)\n", + did, txt); + printk(KERN_INFO PREFIX "HIL pointer has %i buttons and %i sets of %i axes\n", + ptr->nbtn, naxsets, ptr->naxes); + + btntype = BTN_MISC; + if ((did & HIL_IDD_DID_ABS_TABLET_MASK) == HIL_IDD_DID_ABS_TABLET) +#ifdef TABLET_SIMULATES_MOUSE + btntype = BTN_TOUCH; +#else + btntype = BTN_DIGI; +#endif + if ((did & HIL_IDD_DID_ABS_TSCREEN_MASK) == HIL_IDD_DID_ABS_TSCREEN) + btntype = BTN_TOUCH; + + if ((did & HIL_IDD_DID_REL_MOUSE_MASK) == HIL_IDD_DID_REL_MOUSE) + btntype = BTN_MOUSE; + + for (i = 0; i < ptr->nbtn; i++) { + set_bit(btntype | i, ptr->dev.keybit); + ptr->btnmap[i] = btntype | i; + } + + if (btntype == BTN_MOUSE) { + /* Swap buttons 2 and 3 */ + ptr->btnmap[1] = BTN_MIDDLE; + ptr->btnmap[2] = BTN_RIGHT; + } + + if ((did & HIL_IDD_DID_TYPE_MASK) == HIL_IDD_DID_TYPE_REL) { + for (i = 0; i < ptr->naxes; i++) { + set_bit(REL_X + i, ptr->dev.relbit); + } + for (i = 3; (i < ptr->naxes + 3) && (naxsets > 1); i++) { + set_bit(REL_X + i, ptr->dev.relbit); + } + } else { + for (i = 0; i < ptr->naxes; i++) { + set_bit(ABS_X + i, ptr->dev.absbit); + ptr->dev.absmin[ABS_X + i] = 0; + ptr->dev.absmax[ABS_X + i] = + HIL_IDD_AXIS_MAX((ptr->idd + 1), i); + } + for (i = 3; (i < ptr->naxes + 3) && (naxsets > 1); i++) { + set_bit(ABS_X + i, ptr->dev.absbit); + ptr->dev.absmin[ABS_X + i] = 0; + ptr->dev.absmax[ABS_X + i] = + HIL_IDD_AXIS_MAX((ptr->idd + 1), (i - 3)); + } +#ifdef TABLET_AUTOADJUST + for (i = 0; i < ABS_MAX; i++) { + int diff = ptr->dev.absmax[ABS_X + i] / 10; + ptr->dev.absmin[ABS_X + i] += diff; + ptr->dev.absmax[ABS_X + i] -= diff; + } +#endif + } + + ptr->dev.name = strlen(ptr->rnm) ? ptr->rnm : HIL_GENERIC_NAME; + + ptr->dev.id.bustype = BUS_HIL; + ptr->dev.id.vendor = PCI_VENDOR_ID_HP; + ptr->dev.id.product = 0x0001; /* TODO: get from ptr->rsc */ + ptr->dev.id.version = 0x0100; /* TODO: get from ptr->rsc */ + ptr->dev.dev = &serio->dev; + + input_register_device(&ptr->dev); + printk(KERN_INFO "input: %s (%s), ID: %d\n", + ptr->dev.name, + (btntype == BTN_MOUSE) ? "HIL mouse":"HIL tablet or touchpad", + did); + + return; + bail1: + serio_close(serio); + bail0: + kfree(ptr); + return; +} + + +static struct serio_driver hil_ptr_serio_driver = { + .driver = { + .name = "hil_ptr", + }, + .description = "HP HIL mouse/tablet driver", + .connect = hil_ptr_connect, + .disconnect = hil_ptr_disconnect, + .interrupt = hil_ptr_interrupt +}; + +static int __init hil_ptr_init(void) +{ + serio_register_driver(&hil_ptr_serio_driver); + return 0; +} + +static void __exit hil_ptr_exit(void) +{ + serio_unregister_driver(&hil_ptr_serio_driver); +} + +module_init(hil_ptr_init); +module_exit(hil_ptr_exit); |