+++ /dev/null
-/*
- * OLPC touchpad PS/2 mouse driver
- *
- * Copyright (c) 2006 One Laptop Per Child, inc.
- * Authors Zephaniah E. Hull and Andres Salomon <dilinger@laptop.org>
- *
- * This driver is partly based on the ALPS driver, which is:
- *
- * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
- * Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com>
- * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru>
- * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-/*
- * The touchpad on the OLPC is fairly wide, with the entire area usable
- * as a tablet ("PT mode"), and the center 1/3rd also usable as a touchpad
- * ("GS mode").
- *
- * Earlier version of the device had simultaneous reporting; however, that
- * was removed. Instead, the device now reports packets in one mode, and
- * tells the driver when a mode switch needs to happen.
- */
-
-#include <linux/input.h>
-#include <linux/serio.h>
-#include <linux/libps2.h>
-#include <linux/delay.h>
-#include <asm/olpc.h>
-
-#include "psmouse.h"
-#include "olpc.h"
-
-static int tpdebug;
-module_param(tpdebug, int, 0644);
-
-#define OLPC_GS 1 /* The GS sensor. */
-#define OLPC_PT 2 /* The PT sensor. */
-
-static struct olpc_model_info olpc_model_data[] = {
- { { 0x67, 0x00, 0x00 }, OLPC_GS | OLPC_PT }, /* unknown ID */
- { { 0x67, 0x00, 0x0a }, OLPC_GS | OLPC_PT }, /* pre-B1 */
- { { 0x67, 0x00, 0x14 }, OLPC_GS }, /* B1.*/
- { { 0x67, 0x00, 0x28 }, OLPC_GS | OLPC_PT }, /* B2 */
- { { 0x67, 0x00, 0x3c }, OLPC_GS | OLPC_PT }, /* B2-2 */
- { { 0x67, 0x00, 0x50 }, OLPC_GS | OLPC_PT }, /* C1 */
-};
-
-#define OLPC_PKT_PT 0xcf
-#define OLPC_PKT_GS 0xff
-
-static int olpc_absolute_mode(struct psmouse *psmouse, int mode);
-
-/*
- * OLPC absolute Mode - single-mode format
- *
- * byte 0: 1 1 0 0 1 1 1 1
- * byte 1: 0 x6 x5 x4 x3 x2 x1 x0
- * byte 2(PT): 0 0 x9 x8 x7 ? pt-dsw gs-dsw
- * byte 2(GS): 0 x10 x9 x8 x7 ? gs-dsw pt-dsw
- * byte 3: 0 y9 y8 y7 1 0 swr swl
- * byte 4: 0 y6 y5 y4 y3 y2 y1 y0
- * byte 5: 0 z6 z5 z4 z3 z2 z1 z0
- *
- * ?'s are not defined in the protocol spec, may vary between models.
- *
- * swr/swl are the left/right buttons.
- *
- * pt-dsw/gs-dsw indicate that the pt/gs sensor is detecting a
- * pen/finger
- */
-
-static void olpc_process_packet_gspt(struct psmouse *psmouse)
-{
- struct olpc_data *priv = psmouse->private;
- unsigned char *packet = psmouse->packet;
- struct input_dev *dev = psmouse->dev;
- struct input_dev *dev2 = priv->dev2;
- int x, y, z, gs_down = 0, pt_down = 0, left, right;
- struct timeval now_tv;
- s64 now_ns;
-
- left = packet[3] & 1;
- right = packet[3] & 2;
- x = packet[1] | ((packet[2] & 0x78) << 4);
- y = packet[4] | ((packet[3] & 0x70) << 3);
- z = packet[5];
-
- if (psmouse->packet[0] == OLPC_PKT_GS) {
- pt_down = !!(packet[2] & 1);
- gs_down = !!(packet[2] & 2);
- } else if (psmouse->packet[0] == OLPC_PKT_PT) {
- gs_down = !!(packet[2] & 1);
- pt_down = !!(packet[2] & 2);
- }
-
- /*
- * XXX: Kludge.
- * If it's been more than 30ms since the last packet,
- * assume that there was a lift we were never told about.
- */
- do_gettimeofday(&now_tv);
- now_ns = timeval_to_ns (&now_tv);
- if (now_ns >= priv->late) {
- input_report_key(dev, BTN_TOUCH, 0);
- input_report_key(dev, BTN_TOOL_PEN, 0);
- input_report_key(dev2, BTN_TOUCH, 0);
- input_report_key(dev2, BTN_TOOL_FINGER, 0);
-
- input_sync(dev);
- input_sync(dev2);
- }
-
- priv->late = now_ns + (30 * NSEC_PER_MSEC);
-
-
- if (tpdebug) {
- printk(KERN_DEBUG "%s %02x %02x %02x %02x %02x %02x\n",
- __FUNCTION__, psmouse->packet[0], psmouse->packet[1],
- psmouse->packet[2], psmouse->packet[3], psmouse->packet[4],
- psmouse->packet[5]);
- printk(KERN_DEBUG "l=%d r=%d p=%d g=%d x=%d y=%d z=%d\n",
- left, right, pt_down, gs_down, x, y, z);
- }
-
- if (psmouse->packet[0] == OLPC_PKT_PT) {
- input_report_key(dev, BTN_LEFT, left);
- input_report_key(dev, BTN_RIGHT, right);
- } else if (psmouse->packet[0] == OLPC_PKT_GS) {
- input_report_key(dev, BTN_LEFT, left);
- input_report_key(dev, BTN_RIGHT, right);
- input_report_key(dev2, BTN_LEFT, left);
- input_report_key(dev2, BTN_RIGHT, right);
- }
-
- input_report_key(dev, BTN_TOUCH, pt_down);
- input_report_key(dev, BTN_TOOL_PEN, pt_down);
- input_report_key(dev2, BTN_TOUCH, gs_down);
- input_report_key(dev2, BTN_TOOL_FINGER, gs_down);
-
- input_report_abs(dev2, ABS_PRESSURE, z);
-
- if (psmouse->packet[0] == OLPC_PKT_PT && pt_down) {
- input_report_abs(dev, ABS_X, x);
- input_report_abs(dev, ABS_Y, y);
- } else if (psmouse->packet[0] == OLPC_PKT_GS && gs_down) {
- input_report_abs(dev2, ABS_X, x);
- input_report_abs(dev2, ABS_Y, y);
- }
-
- input_sync(dev);
- input_sync(dev2);
-
- if (priv->pending_mode == OLPC_GS &&
- psmouse->packet[0] == OLPC_PKT_PT && pt_down) {
- priv->pending_mode = 0;
- cancel_delayed_work(&priv->mode_switch);
- }
-
- if (priv->i->flags & (OLPC_PT|OLPC_GS)) {
- int pending = 0;
- if (psmouse->packet[0] == OLPC_PKT_PT && !pt_down)
- pending = OLPC_GS;
- else if (psmouse->packet[0] == OLPC_PKT_GS && pt_down)
- pending = OLPC_PT;
-
- if (priv->current_mode == pending) {
- priv->pending_mode = 0;
- pending = priv->current_mode;
- }
- else if (priv->pending_mode != pending) {
- priv->pending_mode = pending;
- if (tpdebug)
- printk(KERN_WARNING "Scheduling mode switch to %s.\n",
- pending == OLPC_GS ? "GS" : "PT");
-
- /*
- * Apply a de-bounce when switching from PT to GS, to allow for
- * spurious PT-up packets.
- */
- if (priv->pending_mode == OLPC_GS)
- queue_delayed_work(kpsmoused_wq, &priv->mode_switch, msecs_to_jiffies(50));
- else
- queue_delayed_work(kpsmoused_wq, &priv->mode_switch, 0);
- }
- }
-}
-
-static psmouse_ret_t olpc_process_byte(struct psmouse *psmouse)
-{
- psmouse_ret_t ret = PSMOUSE_BAD_DATA;
-
- if (psmouse->packet[0] != OLPC_PKT_PT &&
- psmouse->packet[0] != OLPC_PKT_GS)
- goto out;
-
- /* Bytes 2 - 6 should have 0 in the highest bit */
- if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
- (psmouse->packet[psmouse->pktcnt - 1] & 0x80))
- goto out;
-
- if (psmouse->pktcnt == 6) {
- olpc_process_packet_gspt(psmouse);
- ret = PSMOUSE_FULL_PACKET;
- goto out;
- }
-
- ret = PSMOUSE_GOOD_DATA;
-out:
- if (ret != PSMOUSE_GOOD_DATA && ret != PSMOUSE_FULL_PACKET)
- printk(KERN_DEBUG "%s: (%d) %02x %02x %02x %02x %02x %02x\n",
- __FUNCTION__, psmouse->pktcnt, psmouse->packet[0],
- psmouse->packet[1], psmouse->packet[2],
- psmouse->packet[3], psmouse->packet[4],
- psmouse->packet[5]);
- return ret;
-}
-
-static struct olpc_model_info *olpc_get_model(struct psmouse *psmouse)
-{
- struct ps2dev *ps2dev = &psmouse->ps2dev;
- unsigned char param[4];
- int i;
-
- /*
- * Now try "E7 report". Allowed responses are in
- * olpc_model_data[].signature
- */
- if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
- ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
- ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21))
- return NULL;
-
- param[0] = param[1] = param[2] = 0xff;
- if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
- return NULL;
-
- pr_debug("olpc.c(%d): E7 report: %2.2x %2.2x %2.2x",
- __LINE__, param[0], param[1], param[2]);
-
- for (i = 0; i < ARRAY_SIZE(olpc_model_data); i++) {
- if (!memcmp(param, olpc_model_data[i].signature,
- sizeof(olpc_model_data[i].signature))) {
- printk(KERN_INFO __FILE__ ": OLPC touchpad revision 0x%x.\n", param[2]);
- return olpc_model_data + i;
- }
- }
-
- /*
- * ALPS creates new IDs pretty frequently; rather than listing them
- * all, just assume they support the defaults. We've set aside the
- * first entry of olpc_model_data as the catch-all.
- */
- if (!memcmp(param, olpc_model_data[0].signature, 2)) {
- printk(KERN_INFO __FILE__ ": unknown ALPS revision %x, assuming default flags.\n", param[2]);
- return &olpc_model_data[0];
- }
-
- return NULL;
-}
-
-static int olpc_find_mode(struct psmouse *psmouse)
-{
- struct olpc_data *priv = psmouse->private;
- int mode = priv->i->flags;
-
- if (mode & OLPC_GS)
- mode = OLPC_GS;
- else if (mode & OLPC_PT)
- mode = OLPC_PT;
- else
- mode = -1;
-
- return mode;
-}
-
-/*
- * Touchpad should be disabled before calling this!
- */
-static int olpc_new_mode(struct psmouse *psmouse, int mode)
-{
- struct ps2dev *ps2dev = &psmouse->ps2dev;
- struct olpc_data *priv = psmouse->private;
- unsigned char param;
- int ret;
-
- if (tpdebug)
- printk(KERN_WARNING __FILE__ ": Switching to %d. [%lu]\n", mode, jiffies);
-
- if ((ret = ps2_command(ps2dev, ¶m, 0x01F2)))
- goto failed;
- if ((ret = ps2_command(ps2dev, ¶m, 0x01F2)))
- goto failed;
- if ((ret = ps2_command(ps2dev, ¶m, 0x01F2)))
- goto failed;
-
- switch (mode) {
- default:
- printk(KERN_WARNING __FILE__ ": Invalid mode %d. Defaulting to OLPC_GS.\n", mode);
- case OLPC_GS:
- ret = ps2_command(ps2dev, NULL, 0xE6);
- break;
- case OLPC_PT:
- ret = ps2_command(ps2dev, NULL, 0xE7);
- break;
- }
- if (ret)
- goto failed;
-
- /* XXX: This is a bit hacky, make sure this isn't screwing stuff up. */
- psmouse->pktcnt = psmouse->out_of_sync = 0;
- psmouse->last = jiffies;
- psmouse->state = PSMOUSE_ACTIVATED;
-
- if ((ret = ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)))
- goto failed;
-
- priv->current_mode = mode;
- priv->pending_mode = 0;
- if (tpdebug)
- printk(KERN_WARNING __FILE__ ": Switched to mode %d successful.\n", mode);
-
-failed:
- if (ret)
- printk(KERN_WARNING __FILE__ ": Mode switch to %d failed! (%d) [%lu]\n", mode, ret, jiffies);
- return ret;
-}
-
-static int olpc_absolute_mode(struct psmouse *psmouse, int mode)
-{
- struct ps2dev *ps2dev = &psmouse->ps2dev;
-
- /* Switch to 'Advanced mode.', four disables in a row. */
- if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
- ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
- ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
- ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
- return -1;
-
- return olpc_new_mode(psmouse, mode);
-}
-
-/*
- * olpc_poll() - poll the touchpad for current motion packet.
- * Used in resync.
- * Note: We can't poll, so always return failure.
- */
-static int olpc_poll(struct psmouse *psmouse)
-{
- return -1;
-}
-
-static int olpc_reconnect(struct psmouse *psmouse)
-{
- struct olpc_data *priv = psmouse->private;
- int mode;
-
- if (olpc_rev_after(OLPC_REV_B2))
- if (psmouse->ps2dev.serio->dev.power.power_state.event != PM_EVENT_ON)
- return 0;
-
- psmouse_reset(psmouse);
-
- if (!(priv->i = olpc_get_model(psmouse)))
- return -1;
-
- mode = olpc_find_mode(psmouse);
- if (mode < 0)
- return -1;
-
- if (olpc_absolute_mode(psmouse, mode)) {
- printk(KERN_ERR __FILE__ ": Failed to reenable absolute mode.\n");
- return -1;
- }
-
- return 0;
-}
-
-static void olpc_disconnect(struct psmouse *psmouse)
-{
- struct olpc_data *priv = psmouse->private;
-
- psmouse_reset(psmouse);
- input_unregister_device(priv->dev2);
- kfree(priv);
-}
-
-static void olpc_mode_switch(struct work_struct *w)
-{
- struct delayed_work *work = container_of(w, struct delayed_work, work);
- struct olpc_data *priv = container_of(work, struct olpc_data, mode_switch);
- struct psmouse *psmouse = priv->psmouse;
- struct ps2dev *ps2dev = &psmouse->ps2dev;
- int pending_mode, ret;
-
- if (priv->pending_mode == priv->current_mode) {
- priv->pending_mode = 0;
- printk (KERN_DEBUG __FILE__ ": In switch_mode, no target mode.\n");
- return;
- }
-
- if (tpdebug)
- printk(KERN_WARNING __FILE__ ": Disable for switch to %d. [%lu]\n", priv->pending_mode, jiffies);
-
- /* XXX: This is a bit hacky, make sure this isn't screwing stuff up. */
- psmouse->state = PSMOUSE_INITIALIZING;
-
- ret = ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE);
- if (ret) {
- /* XXX: if this ever fails, we need to do a full reset! */
- printk(KERN_WARNING __FILE__ ": Disable failed for switch to %d. (%d) [%lu]\n", priv->pending_mode, ret, jiffies);
- return;
- }
-
- /*
- * ALPS tells us that it may take up to 20msec for the disable to
- * take effect; however, ps2_command() will wait up to 200msec for
- * the ACK to come back (and I'm assuming that by the time the
- * hardware sends back its ACK, it has stopped sending bytes).
- */
- pending_mode = priv->pending_mode;
-
- if (olpc_new_mode(psmouse, priv->pending_mode))
- goto bad;
-
- /*
- * Deal with a potential race condition.
- *
- * If there is a brief tap of a stylus or a fingernail that
- * triggers a mode switch to PT mode, and the stylus/fingernail is
- * lifted after the DISABLE above, but before we reenable in the new mode,
- * then we can get stuck in PT mode.
- */
- if (pending_mode == OLPC_PT) {
- priv->pending_mode = OLPC_GS;
- queue_delayed_work(kpsmoused_wq, &priv->mode_switch, msecs_to_jiffies(50));
- }
-
- return;
-
-bad:
- printk(KERN_WARNING __FILE__ ": Failure to switch modes, resetting device...\n");
- olpc_reconnect(psmouse);
-}
-
-int olpc_init(struct psmouse *psmouse)
-{
- struct olpc_data *priv;
- struct input_dev *dev = psmouse->dev;
- struct input_dev *dev2;
- int mode;
-
- priv = kzalloc(sizeof(struct olpc_data), GFP_KERNEL);
- dev2 = input_allocate_device();
- if (!priv || !dev2)
- goto init_fail;
-
- psmouse->private = priv;
- priv->dev2 = dev2;
- priv->psmouse = psmouse;
-
- psmouse_reset(psmouse);
- if (!(priv->i = olpc_get_model(psmouse)))
- goto init_fail;
-
- mode = olpc_find_mode(psmouse);
- if (mode < 0) {
- printk(KERN_ERR __FILE__ ": Failed to identify proper mode\n");
- goto init_fail;
- }
-
- if (olpc_absolute_mode(psmouse, mode)) {
- printk(KERN_ERR __FILE__ ": Failed to enable absolute mode\n");
- goto init_fail;
- }
-
- /*
- * Unset some of the default bits for things we don't have.
- */
- dev->evbit[LONG(EV_REL)] &= ~BIT(EV_REL);
- dev->relbit[LONG(REL_X)] &= ~(BIT(REL_X) | BIT(REL_Y));
- dev->keybit[LONG(BTN_MIDDLE)] &= ~BIT(BTN_MIDDLE);
-
- dev->evbit[LONG(EV_KEY)] |= BIT(EV_KEY);
- dev->keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);
- dev->keybit[LONG(BTN_TOOL_PEN)] |= BIT(BTN_TOOL_PEN);
- dev->keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT);
-
- dev->evbit[LONG(EV_ABS)] |= BIT(EV_ABS);
- input_set_abs_params(dev, ABS_X, 2, 1000, 0, 0);
- input_set_abs_params(dev, ABS_Y, 0, 717, 0, 0);
-
- snprintf(priv->phys, sizeof(priv->phys),
- "%s/input1", psmouse->ps2dev.serio->phys);
- dev2->phys = priv->phys;
- dev2->name = "OLPC ALPS GlideSensor";
- dev2->id.bustype = BUS_I8042;
- dev2->id.vendor = 0x0002;
- dev2->id.product = PSMOUSE_OLPC;
- dev2->id.version = 0x0000;
-
- dev2->evbit[LONG(EV_KEY)] |= BIT(EV_KEY);
- dev2->keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);
- dev2->keybit[LONG(BTN_TOOL_FINGER)] |= BIT(BTN_TOOL_FINGER);
- dev2->keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT);
-
- dev2->evbit[LONG(EV_ABS)] |= BIT(EV_ABS);
- input_set_abs_params(dev2, ABS_X, 350, 512, 0, 0);
- input_set_abs_params(dev2, ABS_Y, 70, 325, 0, 0);
- input_set_abs_params(dev2, ABS_PRESSURE, 0, 63, 0, 0);
-
- if (input_register_device(dev2)) {
- printk(KERN_ERR __FILE__ ": Failed to register GlideSensor\n");
- goto init_fail;
- }
-
- psmouse->protocol_handler = olpc_process_byte;
- psmouse->poll = olpc_poll;
- psmouse->disconnect = olpc_disconnect;
- psmouse->reconnect = olpc_reconnect;
- psmouse->pktsize = 6;
-
- /* Disable the idle resync. */
- psmouse->resync_time = 0;
- /* Reset after a lot of bad bytes. */
- psmouse->resetafter = 1024;
-
- INIT_DELAYED_WORK(&priv->mode_switch, olpc_mode_switch);
-
- return 0;
-
-init_fail:
- input_free_device(dev2);
- kfree(priv);
- return -1;
-}
-
-int olpc_detect(struct psmouse *psmouse, int set_properties)
-{
- if (!olpc_get_model(psmouse))
- return -1;
-
- if (set_properties) {
- psmouse->vendor = "ALPS";
- psmouse->name = "PenTablet";
- psmouse->model = 0;
- }
- return 0;
-}
-
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