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Diffstat (limited to 'target/linux/olpc/files/drivers/input/mouse/olpc.c')
-rw-r--r--target/linux/olpc/files/drivers/input/mouse/olpc.c554
1 files changed, 554 insertions, 0 deletions
diff --git a/target/linux/olpc/files/drivers/input/mouse/olpc.c b/target/linux/olpc/files/drivers/input/mouse/olpc.c
new file mode 100644
index 0000000000..dc575ac062
--- /dev/null
+++ b/target/linux/olpc/files/drivers/input/mouse/olpc.c
@@ -0,0 +1,554 @@
+/*
+ * 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, &param, 0x01F2)))
+ goto failed;
+ if ((ret = ps2_command(ps2dev, &param, 0x01F2)))
+ goto failed;
+ if ((ret = ps2_command(ps2dev, &param, 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;
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-29 23:39:05 +0000