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707 lines
18 KiB
707 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Cypress Trackpad PS/2 mouse driver |
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* |
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* Copyright (c) 2012 Cypress Semiconductor Corporation. |
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* |
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* Author: |
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* Dudley Du <[email protected]> |
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* |
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* Additional contributors include: |
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* Kamal Mostafa <[email protected]> |
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* Kyle Fazzari <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <linux/serio.h> |
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#include <linux/libps2.h> |
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#include <linux/input.h> |
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#include <linux/input/mt.h> |
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#include <linux/sched.h> |
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#include <linux/wait.h> |
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#include "cypress_ps2.h" |
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#undef CYTP_DEBUG_VERBOSE /* define this and DEBUG for more verbose dump */ |
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static void cypress_set_packet_size(struct psmouse *psmouse, unsigned int n) |
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{ |
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struct cytp_data *cytp = psmouse->private; |
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cytp->pkt_size = n; |
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} |
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static const unsigned char cytp_rate[] = {10, 20, 40, 60, 100, 200}; |
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static const unsigned char cytp_resolution[] = {0x00, 0x01, 0x02, 0x03}; |
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static int cypress_ps2_sendbyte(struct psmouse *psmouse, int value) |
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{ |
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struct ps2dev *ps2dev = &psmouse->ps2dev; |
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if (ps2_sendbyte(ps2dev, value & 0xff, CYTP_CMD_TIMEOUT) < 0) { |
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psmouse_dbg(psmouse, |
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"sending command 0x%02x failed, resp 0x%02x\n", |
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value & 0xff, ps2dev->nak); |
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if (ps2dev->nak == CYTP_PS2_RETRY) |
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return CYTP_PS2_RETRY; |
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else |
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return CYTP_PS2_ERROR; |
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} |
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#ifdef CYTP_DEBUG_VERBOSE |
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psmouse_dbg(psmouse, "sending command 0x%02x succeeded, resp 0xfa\n", |
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value & 0xff); |
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#endif |
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return 0; |
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} |
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static int cypress_ps2_ext_cmd(struct psmouse *psmouse, unsigned short cmd, |
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unsigned char data) |
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{ |
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struct ps2dev *ps2dev = &psmouse->ps2dev; |
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int tries = CYTP_PS2_CMD_TRIES; |
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int rc; |
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ps2_begin_command(ps2dev); |
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do { |
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/* |
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* Send extension command byte (0xE8 or 0xF3). |
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* If sending the command fails, send recovery command |
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* to make the device return to the ready state. |
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*/ |
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rc = cypress_ps2_sendbyte(psmouse, cmd & 0xff); |
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if (rc == CYTP_PS2_RETRY) { |
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rc = cypress_ps2_sendbyte(psmouse, 0x00); |
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if (rc == CYTP_PS2_RETRY) |
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rc = cypress_ps2_sendbyte(psmouse, 0x0a); |
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} |
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if (rc == CYTP_PS2_ERROR) |
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continue; |
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rc = cypress_ps2_sendbyte(psmouse, data); |
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if (rc == CYTP_PS2_RETRY) |
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rc = cypress_ps2_sendbyte(psmouse, data); |
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if (rc == CYTP_PS2_ERROR) |
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continue; |
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else |
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break; |
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} while (--tries > 0); |
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ps2_end_command(ps2dev); |
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return rc; |
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} |
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static int cypress_ps2_read_cmd_status(struct psmouse *psmouse, |
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unsigned char cmd, |
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unsigned char *param) |
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{ |
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int rc; |
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struct ps2dev *ps2dev = &psmouse->ps2dev; |
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enum psmouse_state old_state; |
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int pktsize; |
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ps2_begin_command(ps2dev); |
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old_state = psmouse->state; |
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psmouse->state = PSMOUSE_CMD_MODE; |
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psmouse->pktcnt = 0; |
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pktsize = (cmd == CYTP_CMD_READ_TP_METRICS) ? 8 : 3; |
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memset(param, 0, pktsize); |
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rc = cypress_ps2_sendbyte(psmouse, 0xe9); |
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if (rc < 0) |
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goto out; |
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wait_event_timeout(ps2dev->wait, |
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(psmouse->pktcnt >= pktsize), |
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msecs_to_jiffies(CYTP_CMD_TIMEOUT)); |
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memcpy(param, psmouse->packet, pktsize); |
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psmouse_dbg(psmouse, "Command 0x%02x response data (0x): %*ph\n", |
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cmd, pktsize, param); |
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out: |
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psmouse->state = old_state; |
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psmouse->pktcnt = 0; |
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ps2_end_command(ps2dev); |
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return rc; |
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} |
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static bool cypress_verify_cmd_state(struct psmouse *psmouse, |
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unsigned char cmd, unsigned char *param) |
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{ |
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bool rate_match = false; |
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bool resolution_match = false; |
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int i; |
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/* callers will do further checking. */ |
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if (cmd == CYTP_CMD_READ_CYPRESS_ID || |
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cmd == CYTP_CMD_STANDARD_MODE || |
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cmd == CYTP_CMD_READ_TP_METRICS) |
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return true; |
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if ((~param[0] & DFLT_RESP_BITS_VALID) == DFLT_RESP_BITS_VALID && |
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(param[0] & DFLT_RESP_BIT_MODE) == DFLT_RESP_STREAM_MODE) { |
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for (i = 0; i < sizeof(cytp_resolution); i++) |
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if (cytp_resolution[i] == param[1]) |
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resolution_match = true; |
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for (i = 0; i < sizeof(cytp_rate); i++) |
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if (cytp_rate[i] == param[2]) |
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rate_match = true; |
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if (resolution_match && rate_match) |
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return true; |
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} |
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psmouse_dbg(psmouse, "verify cmd state failed.\n"); |
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return false; |
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} |
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static int cypress_send_ext_cmd(struct psmouse *psmouse, unsigned char cmd, |
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unsigned char *param) |
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{ |
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int tries = CYTP_PS2_CMD_TRIES; |
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int rc; |
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psmouse_dbg(psmouse, "send extension cmd 0x%02x, [%d %d %d %d]\n", |
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cmd, DECODE_CMD_AA(cmd), DECODE_CMD_BB(cmd), |
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DECODE_CMD_CC(cmd), DECODE_CMD_DD(cmd)); |
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do { |
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cypress_ps2_ext_cmd(psmouse, |
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PSMOUSE_CMD_SETRES, DECODE_CMD_DD(cmd)); |
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cypress_ps2_ext_cmd(psmouse, |
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PSMOUSE_CMD_SETRES, DECODE_CMD_CC(cmd)); |
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cypress_ps2_ext_cmd(psmouse, |
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PSMOUSE_CMD_SETRES, DECODE_CMD_BB(cmd)); |
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cypress_ps2_ext_cmd(psmouse, |
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PSMOUSE_CMD_SETRES, DECODE_CMD_AA(cmd)); |
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rc = cypress_ps2_read_cmd_status(psmouse, cmd, param); |
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if (rc) |
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continue; |
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if (cypress_verify_cmd_state(psmouse, cmd, param)) |
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return 0; |
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} while (--tries > 0); |
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return -EIO; |
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} |
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int cypress_detect(struct psmouse *psmouse, bool set_properties) |
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{ |
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unsigned char param[3]; |
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if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param)) |
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return -ENODEV; |
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/* Check for Cypress Trackpad signature bytes: 0x33 0xCC */ |
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if (param[0] != 0x33 || param[1] != 0xCC) |
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return -ENODEV; |
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if (set_properties) { |
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psmouse->vendor = "Cypress"; |
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psmouse->name = "Trackpad"; |
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} |
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return 0; |
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} |
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static int cypress_read_fw_version(struct psmouse *psmouse) |
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{ |
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struct cytp_data *cytp = psmouse->private; |
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unsigned char param[3]; |
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if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param)) |
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return -ENODEV; |
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/* Check for Cypress Trackpad signature bytes: 0x33 0xCC */ |
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if (param[0] != 0x33 || param[1] != 0xCC) |
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return -ENODEV; |
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cytp->fw_version = param[2] & FW_VERSION_MASX; |
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cytp->tp_metrics_supported = (param[2] & TP_METRICS_MASK) ? 1 : 0; |
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/* |
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* Trackpad fw_version 11 (in Dell XPS12) yields a bogus response to |
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* CYTP_CMD_READ_TP_METRICS so do not try to use it. LP: #1103594. |
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*/ |
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if (cytp->fw_version >= 11) |
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cytp->tp_metrics_supported = 0; |
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psmouse_dbg(psmouse, "cytp->fw_version = %d\n", cytp->fw_version); |
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psmouse_dbg(psmouse, "cytp->tp_metrics_supported = %d\n", |
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cytp->tp_metrics_supported); |
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return 0; |
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} |
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static int cypress_read_tp_metrics(struct psmouse *psmouse) |
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{ |
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struct cytp_data *cytp = psmouse->private; |
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unsigned char param[8]; |
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/* set default values for tp metrics. */ |
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cytp->tp_width = CYTP_DEFAULT_WIDTH; |
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cytp->tp_high = CYTP_DEFAULT_HIGH; |
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cytp->tp_max_abs_x = CYTP_ABS_MAX_X; |
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cytp->tp_max_abs_y = CYTP_ABS_MAX_Y; |
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cytp->tp_min_pressure = CYTP_MIN_PRESSURE; |
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cytp->tp_max_pressure = CYTP_MAX_PRESSURE; |
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cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width; |
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cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high; |
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if (!cytp->tp_metrics_supported) |
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return 0; |
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memset(param, 0, sizeof(param)); |
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if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_TP_METRICS, param) == 0) { |
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/* Update trackpad parameters. */ |
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cytp->tp_max_abs_x = (param[1] << 8) | param[0]; |
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cytp->tp_max_abs_y = (param[3] << 8) | param[2]; |
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cytp->tp_min_pressure = param[4]; |
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cytp->tp_max_pressure = param[5]; |
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} |
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if (!cytp->tp_max_pressure || |
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cytp->tp_max_pressure < cytp->tp_min_pressure || |
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!cytp->tp_width || !cytp->tp_high || |
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!cytp->tp_max_abs_x || |
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cytp->tp_max_abs_x < cytp->tp_width || |
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!cytp->tp_max_abs_y || |
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cytp->tp_max_abs_y < cytp->tp_high) |
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return -EINVAL; |
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cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width; |
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cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high; |
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#ifdef CYTP_DEBUG_VERBOSE |
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psmouse_dbg(psmouse, "Dump trackpad hardware configuration as below:\n"); |
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psmouse_dbg(psmouse, "cytp->tp_width = %d\n", cytp->tp_width); |
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psmouse_dbg(psmouse, "cytp->tp_high = %d\n", cytp->tp_high); |
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psmouse_dbg(psmouse, "cytp->tp_max_abs_x = %d\n", cytp->tp_max_abs_x); |
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psmouse_dbg(psmouse, "cytp->tp_max_abs_y = %d\n", cytp->tp_max_abs_y); |
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psmouse_dbg(psmouse, "cytp->tp_min_pressure = %d\n", cytp->tp_min_pressure); |
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psmouse_dbg(psmouse, "cytp->tp_max_pressure = %d\n", cytp->tp_max_pressure); |
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psmouse_dbg(psmouse, "cytp->tp_res_x = %d\n", cytp->tp_res_x); |
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psmouse_dbg(psmouse, "cytp->tp_res_y = %d\n", cytp->tp_res_y); |
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psmouse_dbg(psmouse, "tp_type_APA = %d\n", |
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(param[6] & TP_METRICS_BIT_APA) ? 1 : 0); |
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psmouse_dbg(psmouse, "tp_type_MTG = %d\n", |
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(param[6] & TP_METRICS_BIT_MTG) ? 1 : 0); |
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psmouse_dbg(psmouse, "tp_palm = %d\n", |
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(param[6] & TP_METRICS_BIT_PALM) ? 1 : 0); |
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psmouse_dbg(psmouse, "tp_stubborn = %d\n", |
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(param[6] & TP_METRICS_BIT_STUBBORN) ? 1 : 0); |
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psmouse_dbg(psmouse, "tp_1f_jitter = %d\n", |
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(param[6] & TP_METRICS_BIT_1F_JITTER) >> 2); |
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psmouse_dbg(psmouse, "tp_2f_jitter = %d\n", |
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(param[6] & TP_METRICS_BIT_2F_JITTER) >> 4); |
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psmouse_dbg(psmouse, "tp_1f_spike = %d\n", |
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param[7] & TP_METRICS_BIT_1F_SPIKE); |
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psmouse_dbg(psmouse, "tp_2f_spike = %d\n", |
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(param[7] & TP_METRICS_BIT_2F_SPIKE) >> 2); |
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psmouse_dbg(psmouse, "tp_abs_packet_format_set = %d\n", |
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(param[7] & TP_METRICS_BIT_ABS_PKT_FORMAT_SET) >> 4); |
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#endif |
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return 0; |
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} |
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static int cypress_query_hardware(struct psmouse *psmouse) |
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{ |
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int ret; |
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ret = cypress_read_fw_version(psmouse); |
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if (ret) |
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return ret; |
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ret = cypress_read_tp_metrics(psmouse); |
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if (ret) |
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return ret; |
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return 0; |
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} |
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static int cypress_set_absolute_mode(struct psmouse *psmouse) |
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{ |
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struct cytp_data *cytp = psmouse->private; |
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unsigned char param[3]; |
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if (cypress_send_ext_cmd(psmouse, CYTP_CMD_ABS_WITH_PRESSURE_MODE, param) < 0) |
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return -1; |
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cytp->mode = (cytp->mode & ~CYTP_BIT_ABS_REL_MASK) |
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| CYTP_BIT_ABS_PRESSURE; |
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cypress_set_packet_size(psmouse, 5); |
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return 0; |
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} |
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/* |
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* Reset trackpad device. |
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* This is also the default mode when trackpad powered on. |
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*/ |
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static void cypress_reset(struct psmouse *psmouse) |
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{ |
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struct cytp_data *cytp = psmouse->private; |
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cytp->mode = 0; |
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psmouse_reset(psmouse); |
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} |
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static int cypress_set_input_params(struct input_dev *input, |
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struct cytp_data *cytp) |
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{ |
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int ret; |
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if (!cytp->tp_res_x || !cytp->tp_res_y) |
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return -EINVAL; |
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__set_bit(EV_ABS, input->evbit); |
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input_set_abs_params(input, ABS_X, 0, cytp->tp_max_abs_x, 0, 0); |
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input_set_abs_params(input, ABS_Y, 0, cytp->tp_max_abs_y, 0, 0); |
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input_set_abs_params(input, ABS_PRESSURE, |
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cytp->tp_min_pressure, cytp->tp_max_pressure, 0, 0); |
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input_set_abs_params(input, ABS_TOOL_WIDTH, 0, 255, 0, 0); |
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/* finger position */ |
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input_set_abs_params(input, ABS_MT_POSITION_X, 0, cytp->tp_max_abs_x, 0, 0); |
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input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cytp->tp_max_abs_y, 0, 0); |
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input_set_abs_params(input, ABS_MT_PRESSURE, 0, 255, 0, 0); |
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ret = input_mt_init_slots(input, CYTP_MAX_MT_SLOTS, |
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INPUT_MT_DROP_UNUSED|INPUT_MT_TRACK); |
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if (ret < 0) |
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return ret; |
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__set_bit(INPUT_PROP_SEMI_MT, input->propbit); |
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input_abs_set_res(input, ABS_X, cytp->tp_res_x); |
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input_abs_set_res(input, ABS_Y, cytp->tp_res_y); |
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input_abs_set_res(input, ABS_MT_POSITION_X, cytp->tp_res_x); |
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input_abs_set_res(input, ABS_MT_POSITION_Y, cytp->tp_res_y); |
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__set_bit(BTN_TOUCH, input->keybit); |
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__set_bit(BTN_TOOL_FINGER, input->keybit); |
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__set_bit(BTN_TOOL_DOUBLETAP, input->keybit); |
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__set_bit(BTN_TOOL_TRIPLETAP, input->keybit); |
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__set_bit(BTN_TOOL_QUADTAP, input->keybit); |
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__set_bit(BTN_TOOL_QUINTTAP, input->keybit); |
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__clear_bit(EV_REL, input->evbit); |
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__clear_bit(REL_X, input->relbit); |
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__clear_bit(REL_Y, input->relbit); |
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|
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__set_bit(EV_KEY, input->evbit); |
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__set_bit(BTN_LEFT, input->keybit); |
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__set_bit(BTN_RIGHT, input->keybit); |
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__set_bit(BTN_MIDDLE, input->keybit); |
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return 0; |
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} |
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static int cypress_get_finger_count(unsigned char header_byte) |
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{ |
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unsigned char bits6_7; |
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int finger_count; |
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bits6_7 = header_byte >> 6; |
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finger_count = bits6_7 & 0x03; |
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|
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if (finger_count == 1) |
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return 1; |
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|
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if (header_byte & ABS_HSCROLL_BIT) { |
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/* HSCROLL gets added on to 0 finger count. */ |
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switch (finger_count) { |
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case 0: return 4; |
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case 2: return 5; |
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default: |
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/* Invalid contact (e.g. palm). Ignore it. */ |
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return 0; |
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} |
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} |
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return finger_count; |
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} |
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static int cypress_parse_packet(struct psmouse *psmouse, |
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struct cytp_data *cytp, struct cytp_report_data *report_data) |
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{ |
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unsigned char *packet = psmouse->packet; |
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unsigned char header_byte = packet[0]; |
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|
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memset(report_data, 0, sizeof(struct cytp_report_data)); |
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|
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report_data->contact_cnt = cypress_get_finger_count(header_byte); |
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report_data->tap = (header_byte & ABS_MULTIFINGER_TAP) ? 1 : 0; |
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|
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if (report_data->contact_cnt == 1) { |
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report_data->contacts[0].x = |
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((packet[1] & 0x70) << 4) | packet[2]; |
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report_data->contacts[0].y = |
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((packet[1] & 0x07) << 8) | packet[3]; |
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if (cytp->mode & CYTP_BIT_ABS_PRESSURE) |
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report_data->contacts[0].z = packet[4]; |
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|
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} else if (report_data->contact_cnt >= 2) { |
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report_data->contacts[0].x = |
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((packet[1] & 0x70) << 4) | packet[2]; |
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report_data->contacts[0].y = |
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((packet[1] & 0x07) << 8) | packet[3]; |
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if (cytp->mode & CYTP_BIT_ABS_PRESSURE) |
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report_data->contacts[0].z = packet[4]; |
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|
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report_data->contacts[1].x = |
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((packet[5] & 0xf0) << 4) | packet[6]; |
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report_data->contacts[1].y = |
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((packet[5] & 0x0f) << 8) | packet[7]; |
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if (cytp->mode & CYTP_BIT_ABS_PRESSURE) |
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report_data->contacts[1].z = report_data->contacts[0].z; |
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} |
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|
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report_data->left = (header_byte & BTN_LEFT_BIT) ? 1 : 0; |
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report_data->right = (header_byte & BTN_RIGHT_BIT) ? 1 : 0; |
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|
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/* |
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* This is only true if one of the mouse buttons were tapped. Make |
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* sure it doesn't turn into a click. The regular tap-to-click |
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* functionality will handle that on its own. If we don't do this, |
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* disabling tap-to-click won't affect the mouse button zones. |
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*/ |
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if (report_data->tap) |
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report_data->left = 0; |
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|
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#ifdef CYTP_DEBUG_VERBOSE |
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{ |
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int i; |
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int n = report_data->contact_cnt; |
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psmouse_dbg(psmouse, "Dump parsed report data as below:\n"); |
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psmouse_dbg(psmouse, "contact_cnt = %d\n", |
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report_data->contact_cnt); |
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if (n > CYTP_MAX_MT_SLOTS) |
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n = CYTP_MAX_MT_SLOTS; |
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for (i = 0; i < n; i++) |
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psmouse_dbg(psmouse, "contacts[%d] = {%d, %d, %d}\n", i, |
|
report_data->contacts[i].x, |
|
report_data->contacts[i].y, |
|
report_data->contacts[i].z); |
|
psmouse_dbg(psmouse, "left = %d\n", report_data->left); |
|
psmouse_dbg(psmouse, "right = %d\n", report_data->right); |
|
psmouse_dbg(psmouse, "middle = %d\n", report_data->middle); |
|
} |
|
#endif |
|
|
|
return 0; |
|
} |
|
|
|
static void cypress_process_packet(struct psmouse *psmouse, bool zero_pkt) |
|
{ |
|
int i; |
|
struct input_dev *input = psmouse->dev; |
|
struct cytp_data *cytp = psmouse->private; |
|
struct cytp_report_data report_data; |
|
struct cytp_contact *contact; |
|
struct input_mt_pos pos[CYTP_MAX_MT_SLOTS]; |
|
int slots[CYTP_MAX_MT_SLOTS]; |
|
int n; |
|
|
|
cypress_parse_packet(psmouse, cytp, &report_data); |
|
|
|
n = report_data.contact_cnt; |
|
if (n > CYTP_MAX_MT_SLOTS) |
|
n = CYTP_MAX_MT_SLOTS; |
|
|
|
for (i = 0; i < n; i++) { |
|
contact = &report_data.contacts[i]; |
|
pos[i].x = contact->x; |
|
pos[i].y = contact->y; |
|
} |
|
|
|
input_mt_assign_slots(input, slots, pos, n, 0); |
|
|
|
for (i = 0; i < n; i++) { |
|
contact = &report_data.contacts[i]; |
|
input_mt_slot(input, slots[i]); |
|
input_mt_report_slot_state(input, MT_TOOL_FINGER, true); |
|
input_report_abs(input, ABS_MT_POSITION_X, contact->x); |
|
input_report_abs(input, ABS_MT_POSITION_Y, contact->y); |
|
input_report_abs(input, ABS_MT_PRESSURE, contact->z); |
|
} |
|
|
|
input_mt_sync_frame(input); |
|
|
|
input_mt_report_finger_count(input, report_data.contact_cnt); |
|
|
|
input_report_key(input, BTN_LEFT, report_data.left); |
|
input_report_key(input, BTN_RIGHT, report_data.right); |
|
input_report_key(input, BTN_MIDDLE, report_data.middle); |
|
|
|
input_sync(input); |
|
} |
|
|
|
static psmouse_ret_t cypress_validate_byte(struct psmouse *psmouse) |
|
{ |
|
int contact_cnt; |
|
int index = psmouse->pktcnt - 1; |
|
unsigned char *packet = psmouse->packet; |
|
struct cytp_data *cytp = psmouse->private; |
|
|
|
if (index < 0 || index > cytp->pkt_size) |
|
return PSMOUSE_BAD_DATA; |
|
|
|
if (index == 0 && (packet[0] & 0xfc) == 0) { |
|
/* call packet process for reporting finger leave. */ |
|
cypress_process_packet(psmouse, 1); |
|
return PSMOUSE_FULL_PACKET; |
|
} |
|
|
|
/* |
|
* Perform validation (and adjust packet size) based only on the |
|
* first byte; allow all further bytes through. |
|
*/ |
|
if (index != 0) |
|
return PSMOUSE_GOOD_DATA; |
|
|
|
/* |
|
* If absolute/relative mode bit has not been set yet, just pass |
|
* the byte through. |
|
*/ |
|
if ((cytp->mode & CYTP_BIT_ABS_REL_MASK) == 0) |
|
return PSMOUSE_GOOD_DATA; |
|
|
|
if ((packet[0] & 0x08) == 0x08) |
|
return PSMOUSE_BAD_DATA; |
|
|
|
contact_cnt = cypress_get_finger_count(packet[0]); |
|
if (cytp->mode & CYTP_BIT_ABS_NO_PRESSURE) |
|
cypress_set_packet_size(psmouse, contact_cnt == 2 ? 7 : 4); |
|
else |
|
cypress_set_packet_size(psmouse, contact_cnt == 2 ? 8 : 5); |
|
|
|
return PSMOUSE_GOOD_DATA; |
|
} |
|
|
|
static psmouse_ret_t cypress_protocol_handler(struct psmouse *psmouse) |
|
{ |
|
struct cytp_data *cytp = psmouse->private; |
|
|
|
if (psmouse->pktcnt >= cytp->pkt_size) { |
|
cypress_process_packet(psmouse, 0); |
|
return PSMOUSE_FULL_PACKET; |
|
} |
|
|
|
return cypress_validate_byte(psmouse); |
|
} |
|
|
|
static void cypress_set_rate(struct psmouse *psmouse, unsigned int rate) |
|
{ |
|
struct cytp_data *cytp = psmouse->private; |
|
|
|
if (rate >= 80) { |
|
psmouse->rate = 80; |
|
cytp->mode |= CYTP_BIT_HIGH_RATE; |
|
} else { |
|
psmouse->rate = 40; |
|
cytp->mode &= ~CYTP_BIT_HIGH_RATE; |
|
} |
|
|
|
ps2_command(&psmouse->ps2dev, (unsigned char *)&psmouse->rate, |
|
PSMOUSE_CMD_SETRATE); |
|
} |
|
|
|
static void cypress_disconnect(struct psmouse *psmouse) |
|
{ |
|
cypress_reset(psmouse); |
|
kfree(psmouse->private); |
|
psmouse->private = NULL; |
|
} |
|
|
|
static int cypress_reconnect(struct psmouse *psmouse) |
|
{ |
|
int tries = CYTP_PS2_CMD_TRIES; |
|
int rc; |
|
|
|
do { |
|
cypress_reset(psmouse); |
|
rc = cypress_detect(psmouse, false); |
|
} while (rc && (--tries > 0)); |
|
|
|
if (rc) { |
|
psmouse_err(psmouse, "Reconnect: unable to detect trackpad.\n"); |
|
return -1; |
|
} |
|
|
|
if (cypress_set_absolute_mode(psmouse)) { |
|
psmouse_err(psmouse, "Reconnect: Unable to initialize Cypress absolute mode.\n"); |
|
return -1; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int cypress_init(struct psmouse *psmouse) |
|
{ |
|
struct cytp_data *cytp; |
|
|
|
cytp = kzalloc(sizeof(struct cytp_data), GFP_KERNEL); |
|
if (!cytp) |
|
return -ENOMEM; |
|
|
|
psmouse->private = cytp; |
|
psmouse->pktsize = 8; |
|
|
|
cypress_reset(psmouse); |
|
|
|
if (cypress_query_hardware(psmouse)) { |
|
psmouse_err(psmouse, "Unable to query Trackpad hardware.\n"); |
|
goto err_exit; |
|
} |
|
|
|
if (cypress_set_absolute_mode(psmouse)) { |
|
psmouse_err(psmouse, "init: Unable to initialize Cypress absolute mode.\n"); |
|
goto err_exit; |
|
} |
|
|
|
if (cypress_set_input_params(psmouse->dev, cytp) < 0) { |
|
psmouse_err(psmouse, "init: Unable to set input params.\n"); |
|
goto err_exit; |
|
} |
|
|
|
psmouse->model = 1; |
|
psmouse->protocol_handler = cypress_protocol_handler; |
|
psmouse->set_rate = cypress_set_rate; |
|
psmouse->disconnect = cypress_disconnect; |
|
psmouse->reconnect = cypress_reconnect; |
|
psmouse->cleanup = cypress_reset; |
|
psmouse->resync_time = 0; |
|
|
|
return 0; |
|
|
|
err_exit: |
|
/* |
|
* Reset Cypress Trackpad as a standard mouse. Then |
|
* let psmouse driver commmunicating with it as default PS2 mouse. |
|
*/ |
|
cypress_reset(psmouse); |
|
|
|
psmouse->private = NULL; |
|
kfree(cytp); |
|
|
|
return -1; |
|
}
|
|
|