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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#include <linux/device.h>#include <linux/libps2.h>#include <linux/input/mt.h>#include <linux/serio.h>#include <linux/slab.h>#include "psmouse.h"#include "focaltech.h"
static const char * const focaltech_pnp_ids[] = { "FLT0101", "FLT0102", "FLT0103", NULL};
/* * Even if the kernel is built without support for Focaltech PS/2 touchpads (or * when the real driver fails to recognize the device), we still have to detect * them in order to avoid further detection attempts confusing the touchpad. * This way it at least works in PS/2 mouse compatibility mode. */int focaltech_detect(struct psmouse *psmouse, bool set_properties){ if (!psmouse_matches_pnp_id(psmouse, focaltech_pnp_ids)) return -ENODEV;
if (set_properties) { psmouse->vendor = "FocalTech"; psmouse->name = "Touchpad"; }
return 0;}
#ifdef CONFIG_MOUSE_PS2_FOCALTECH
/* * Packet types - the numbers are not consecutive, so we might be missing * something here. */#define FOC_TOUCH 0x3 /* bitmap of active fingers */#define FOC_ABS 0x6 /* absolute position of one finger */#define FOC_REL 0x9 /* relative position of 1-2 fingers */
#define FOC_MAX_FINGERS 5
/* * Current state of a single finger on the touchpad. */struct focaltech_finger_state { /* The touchpad has generated a touch event for the finger */ bool active;
/* * The touchpad has sent position data for the finger. The * flag is 0 when the finger is not active, and there is a * time between the first touch event for the finger and the * following absolute position packet for the finger where the * touchpad has declared the finger to be valid, but we do not * have any valid position yet. */ bool valid;
/* * Absolute position (from the bottom left corner) of the * finger. */ int x; int y;};
/* * Description of the current state of the touchpad hardware. */struct focaltech_hw_state { /* * The touchpad tracks the positions of the fingers for us, * the array indices correspond to the finger indices returned * in the report packages. */ struct focaltech_finger_state fingers[FOC_MAX_FINGERS];
/* * Finger width 0-7 and 15 for a very big contact area. * 15 value stays until the finger is released. * Width is reported only in absolute packets. * Since hardware reports width only for last touching finger, * there is no need to store width for every specific finger, * so we keep only last value reported. */ unsigned int width;
/* True if the clickpad has been pressed. */ bool pressed;};
struct focaltech_data { int x_max, y_max; struct focaltech_hw_state state;};
static void focaltech_report_state(struct psmouse *psmouse){ struct focaltech_data *priv = psmouse->private; struct focaltech_hw_state *state = &priv->state; struct input_dev *dev = psmouse->dev; int i;
for (i = 0; i < FOC_MAX_FINGERS; i++) { struct focaltech_finger_state *finger = &state->fingers[i]; bool active = finger->active && finger->valid;
input_mt_slot(dev, i); input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); if (active) { /* * The touchpad might report invalid data, so we clamp * the resulting values so that we do not confuse * userspace or accumulate coordinate wind-up. */ finger->x = clamp(finger->x, 0, priv->x_max); finger->y = clamp(finger->y, 0, priv->y_max); input_report_abs(dev, ABS_MT_POSITION_X, finger->x); input_report_abs(dev, ABS_MT_POSITION_Y, priv->y_max - finger->y); input_report_abs(dev, ABS_TOOL_WIDTH, state->width); } } input_mt_report_pointer_emulation(dev, true);
input_report_key(dev, BTN_LEFT, state->pressed); input_sync(dev);}
static void focaltech_process_touch_packet(struct psmouse *psmouse, unsigned char *packet){ struct focaltech_data *priv = psmouse->private; struct focaltech_hw_state *state = &priv->state; unsigned char fingers = packet[1]; int i;
state->pressed = (packet[0] >> 4) & 1;
/* the second byte contains a bitmap of all fingers touching the pad */ for (i = 0; i < FOC_MAX_FINGERS; i++) { state->fingers[i].active = fingers & 0x1; if (!state->fingers[i].active) { /* * Even when the finger becomes active again, we still * will have to wait for the first valid position. */ state->fingers[i].valid = false; } fingers >>= 1; }}
static void focaltech_process_abs_packet(struct psmouse *psmouse, unsigned char *packet){ struct focaltech_data *priv = psmouse->private; struct focaltech_hw_state *state = &priv->state; unsigned int finger;
finger = (packet[1] >> 4) - 1; if (finger >= FOC_MAX_FINGERS) { psmouse_err(psmouse, "Invalid finger in abs packet: %d\n", finger); return; }
state->pressed = (packet[0] >> 4) & 1;
state->fingers[finger].x = ((packet[1] & 0xf) << 8) | packet[2]; state->fingers[finger].y = (packet[3] << 8) | packet[4]; state->width = packet[5] >> 4; state->fingers[finger].valid = true;}
static void focaltech_process_rel_packet(struct psmouse *psmouse, unsigned char *packet){ struct focaltech_data *priv = psmouse->private; struct focaltech_hw_state *state = &priv->state; unsigned int finger1, finger2;
state->pressed = packet[0] >> 7; finger1 = ((packet[0] >> 4) & 0x7) - 1; if (finger1 < FOC_MAX_FINGERS) { state->fingers[finger1].x += (s8)packet[1]; state->fingers[finger1].y += (s8)packet[2]; } else { psmouse_err(psmouse, "First finger in rel packet invalid: %d\n", finger1); }
/* * If there is an odd number of fingers, the last relative * packet only contains one finger. In this case, the second * finger index in the packet is 0 (we subtract 1 in the lines * above to create array indices, so the finger will overflow * and be above FOC_MAX_FINGERS). */ finger2 = ((packet[3] >> 4) & 0x7) - 1; if (finger2 < FOC_MAX_FINGERS) { state->fingers[finger2].x += (s8)packet[4]; state->fingers[finger2].y += (s8)packet[5]; }}
static void focaltech_process_packet(struct psmouse *psmouse){ unsigned char *packet = psmouse->packet;
switch (packet[0] & 0xf) { case FOC_TOUCH: focaltech_process_touch_packet(psmouse, packet); break;
case FOC_ABS: focaltech_process_abs_packet(psmouse, packet); break;
case FOC_REL: focaltech_process_rel_packet(psmouse, packet); break;
default: psmouse_err(psmouse, "Unknown packet type: %02x\n", packet[0]); break; }
focaltech_report_state(psmouse);}
static psmouse_ret_t focaltech_process_byte(struct psmouse *psmouse){ if (psmouse->pktcnt >= 6) { /* Full packet received */ focaltech_process_packet(psmouse); return PSMOUSE_FULL_PACKET; }
/* * We might want to do some validation of the data here, but * we do not know the protocol well enough */ return PSMOUSE_GOOD_DATA;}
static int focaltech_switch_protocol(struct psmouse *psmouse){ struct ps2dev *ps2dev = &psmouse->ps2dev; unsigned char param[3];
param[0] = 0; if (ps2_command(ps2dev, param, 0x10f8)) return -EIO;
if (ps2_command(ps2dev, param, 0x10f8)) return -EIO;
if (ps2_command(ps2dev, param, 0x10f8)) return -EIO;
param[0] = 1; if (ps2_command(ps2dev, param, 0x10f8)) return -EIO;
if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETSCALE11)) return -EIO;
if (ps2_command(ps2dev, param, PSMOUSE_CMD_ENABLE)) return -EIO;
return 0;}
static void focaltech_reset(struct psmouse *psmouse){ ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); psmouse_reset(psmouse);}
static void focaltech_disconnect(struct psmouse *psmouse){ focaltech_reset(psmouse); kfree(psmouse->private); psmouse->private = NULL;}
static int focaltech_reconnect(struct psmouse *psmouse){ int error;
focaltech_reset(psmouse);
error = focaltech_switch_protocol(psmouse); if (error) { psmouse_err(psmouse, "Unable to initialize the device\n"); return error; }
return 0;}
static void focaltech_set_input_params(struct psmouse *psmouse){ struct input_dev *dev = psmouse->dev; struct focaltech_data *priv = psmouse->private;
/* * Undo part of setup done for us by psmouse core since touchpad * is not a relative device. */ __clear_bit(EV_REL, dev->evbit); __clear_bit(REL_X, dev->relbit); __clear_bit(REL_Y, dev->relbit); __clear_bit(BTN_RIGHT, dev->keybit); __clear_bit(BTN_MIDDLE, dev->keybit);
/* * Now set up our capabilities. */ __set_bit(EV_ABS, dev->evbit); input_set_abs_params(dev, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0); input_set_abs_params(dev, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0); input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0); input_mt_init_slots(dev, 5, INPUT_MT_POINTER); __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);}
static int focaltech_read_register(struct ps2dev *ps2dev, int reg, unsigned char *param){ if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETSCALE11)) return -EIO;
param[0] = 0; if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) return -EIO;
if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) return -EIO;
if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) return -EIO;
param[0] = reg; if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) return -EIO;
if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) return -EIO;
return 0;}
static int focaltech_read_size(struct psmouse *psmouse){ struct ps2dev *ps2dev = &psmouse->ps2dev; struct focaltech_data *priv = psmouse->private; char param[3];
if (focaltech_read_register(ps2dev, 2, param)) return -EIO;
/* not sure whether this is 100% correct */ priv->x_max = (unsigned char)param[1] * 128; priv->y_max = (unsigned char)param[2] * 128;
return 0;}
static void focaltech_set_resolution(struct psmouse *psmouse, unsigned int resolution){ /* not supported yet */}
static void focaltech_set_rate(struct psmouse *psmouse, unsigned int rate){ /* not supported yet */}
static void focaltech_set_scale(struct psmouse *psmouse, enum psmouse_scale scale){ /* not supported yet */}
int focaltech_init(struct psmouse *psmouse){ struct focaltech_data *priv; int error;
psmouse->private = priv = kzalloc_obj(*priv); if (!priv) return -ENOMEM;
focaltech_reset(psmouse);
error = focaltech_read_size(psmouse); if (error) { psmouse_err(psmouse, "Unable to read the size of the touchpad\n"); goto fail; }
error = focaltech_switch_protocol(psmouse); if (error) { psmouse_err(psmouse, "Unable to initialize the device\n"); goto fail; }
focaltech_set_input_params(psmouse);
psmouse->protocol_handler = focaltech_process_byte; psmouse->pktsize = 6; psmouse->disconnect = focaltech_disconnect; psmouse->reconnect = focaltech_reconnect; psmouse->cleanup = focaltech_reset; /* resync is not supported yet */ psmouse->resync_time = 0; /* * rate/resolution/scale changes are not supported yet, and * the generic implementations of these functions seem to * confuse some touchpads */ psmouse->set_resolution = focaltech_set_resolution; psmouse->set_rate = focaltech_set_rate; psmouse->set_scale = focaltech_set_scale;
return 0;
fail: focaltech_reset(psmouse); kfree(priv); return error;}#endif /* CONFIG_MOUSE_PS2_FOCALTECH */