// SPDX-License-Identifier: GPL-2.0-or-later
/*-
* Finger Sensing Pad PS/2 mouse driver.
*
* Copyright (C) 2005-2007 Asia Vital Components Co., Ltd.
* Copyright (C) 2005-2012 Tai-hwa Liang, Sentelic Corporation.
*/
#include <linux/module.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/ctype.h>
#include <linux/libps2.h>
#include <linux/serio.h>
#include <linux/jiffies.h>
#include <linux/slab.h>
#include "psmouse.h"
#include "sentelic.h"
/*
* Timeout for FSP PS/2 command only (in milliseconds).
*/
#define FSP_CMD_TIMEOUT 200
#define FSP_CMD_TIMEOUT2 30
#define GET_ABS_X(packet) ((packet[1] << 2) | ((packet[3] >> 2) & 0x03))
#define GET_ABS_Y(packet) ((packet[2] << 2) | (packet[3] & 0x03))
/** Driver version. */
static const char fsp_drv_ver[] = "1.1.0-K";
/*
* Make sure that the value being sent to FSP will not conflict with
* possible sample rate values.
*/
static unsigned char fsp_test_swap_cmd(unsigned char reg_val)
{
switch (reg_val) {
case 10: case 20: case 40: case 60: case 80: case 100: case 200:
/*
* The requested value being sent to FSP matched to possible
* sample rates, swap the given value such that the hardware
* wouldn't get confused.
*/
return (reg_val >> 4) | (reg_val << 4);
default:
return reg_val; /* swap isn't necessary */
}
}
/*
* Make sure that the value being sent to FSP will not conflict with certain
* commands.
*/
static unsigned char fsp_test_invert_cmd(unsigned char reg_val)
{
switch (reg_val) {
case 0xe9: case 0xee: case 0xf2: case 0xff:
/*
* The requested value being sent to FSP matched to certain
* commands, inverse the given value such that the hardware
* wouldn't get confused.
*/
return ~reg_val;
default:
return reg_val; /* inversion isn't necessary */
}
}
static int fsp_reg_read(struct psmouse *psmouse, int reg_addr, int *reg_val)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char param[3];
unsigned char addr;
int rc = -1;
/*
* We need to shut off the device and switch it into command
* mode so we don't confuse our protocol handler. We don't need
* to do that for writes because sysfs set helper does this for
* us.
*/
psmouse_deactivate(psmouse);
ps2_begin_command(ps2dev);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
/* should return 0xfe(request for resending) */
ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
/* should return 0xfc(failed) */
ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
if ((addr = fsp_test_invert_cmd(reg_addr)) != reg_addr) {
ps2_sendbyte(ps2dev, 0x68, FSP_CMD_TIMEOUT2);
} else if ((addr = fsp_test_swap_cmd(reg_addr)) != reg_addr) {
/* swapping is required */
ps2_sendbyte(ps2dev, 0xcc, FSP_CMD_TIMEOUT2);
/* expect 0xfe */
} else {
/* swapping isn't necessary */
ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
/* expect 0xfe */
}
/* should return 0xfc(failed) */
ps2_sendbyte(ps2dev, addr, FSP_CMD_TIMEOUT);
if (__ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) < 0)
goto out;
*reg_val = param[2];
rc = 0;
out:
ps2_end_command(ps2dev);
psmouse_activate(psmouse);
psmouse_dbg(psmouse,
"READ REG: 0x%02x is 0x%02x (rc = %d)\n",
reg_addr, *reg_val, rc);
return rc;
}
static int fsp_reg_write(struct psmouse *psmouse, int reg_addr, int reg_val)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char v;
int rc = -1;
ps2_begin_command(ps2dev);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
if ((v = fsp_test_invert_cmd(reg_addr)) != reg_addr) {
/* inversion is required */
ps2_sendbyte(ps2dev, 0x74, FSP_CMD_TIMEOUT2);
} else {
if ((v = fsp_test_swap_cmd(reg_addr)) != reg_addr) {
/* swapping is required */
ps2_sendbyte(ps2dev, 0x77, FSP_CMD_TIMEOUT2);
} else {
/* swapping isn't necessary */
ps2_sendbyte(ps2dev, 0x55, FSP_CMD_TIMEOUT2);
}
}
/* write the register address in correct order */
ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
if ((v = fsp_test_invert_cmd(reg_val)) != reg_val) {
/* inversion is required */
ps2_sendbyte(ps2dev, 0x47, FSP_CMD_TIMEOUT2);
} else if ((v = fsp_test_swap_cmd(reg_val)) != reg_val) {
/* swapping is required */
ps2_sendbyte(ps2dev, 0x44, FSP_CMD_TIMEOUT2);
} else {
/* swapping isn't necessary */
ps2_sendbyte(ps2dev, 0x33, FSP_CMD_TIMEOUT2);
}
/* write the register value in correct order */
ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
rc = 0;
out:
ps2_end_command(ps2dev);
psmouse_dbg(psmouse,
"WRITE REG: 0x%02x to 0x%02x (rc = %d)\n",
reg_addr, reg_val, rc);
return rc;
}
/* Enable register clock gating for writing certain registers */
static int fsp_reg_write_enable(struct psmouse *psmouse, bool enable)
{
int v, nv;
if (fsp_reg_read(psmouse, FSP_REG_SYSCTL1, &v) == -1)
return -1;
if (enable)
nv = v | FSP_BIT_EN_REG_CLK;
else
nv = v & ~FSP_BIT_EN_REG_CLK;
/* only write if necessary */
if (nv != v)
if (fsp_reg_write(psmouse, FSP_REG_SYSCTL1, nv) == -1)
return -1;
return 0;
}
static int fsp_page_reg_read(struct psmouse *psmouse, int *reg_val)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char param[3];
int rc = -1;
psmouse_deactivate(psmouse);
ps2_begin_command(ps2dev);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
ps2_sendbyte(ps2dev, 0x83, FSP_CMD_TIMEOUT2);
ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
/* get the returned result */
if (__ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
goto out;
*reg_val = param[2];
rc = 0;
out:
ps2_end_command(ps2dev);
psmouse_activate(psmouse);
psmouse_dbg(psmouse,
"READ PAGE REG: 0x%02x (rc = %d)\n",
*reg_val, rc);
return rc;
}
static int fsp_page_reg_write(struct psmouse *psmouse, int reg_val)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char v;
int rc = -1;
ps2_begin_command(ps2dev);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
ps2_sendbyte(ps2dev, 0x38, FSP_CMD_TIMEOUT2);
ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
if ((v = fsp_test_invert_cmd(reg_val)) != reg_val) {
ps2_sendbyte(ps2dev, 0x47, FSP_CMD_TIMEOUT2);
} else if ((v = fsp_test_swap_cmd(reg_val)) != reg_val) {
/* swapping is required */
ps2_sendbyte(ps2dev, 0x44, FSP_CMD_TIMEOUT2);
} else {
/* swapping isn't necessary */
ps2_sendbyte(ps2dev, 0x33, FSP_CMD_TIMEOUT2);
}
ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
rc = 0;
out:
ps2_end_command(ps2dev);
psmouse_dbg(psmouse,
"WRITE PAGE REG: to 0x%02x (rc = %d)\n",
reg_val, rc);
return rc;
}
static int fsp_get_version(struct psmouse *psmouse, int *version)
{
if (fsp_reg_read(psmouse, FSP_REG_VERSION, version))
return -EIO;
return 0;
}
static int fsp_get_revision(struct psmouse *psmouse, int *rev)
{
if (fsp_reg_read(psmouse, FSP_REG_REVISION, rev))
return -EIO;
return 0;
}
static int fsp_get_sn(struct psmouse *psmouse, int *sn)
{
int v0, v1, v2;
int rc = -EIO;
/* production number since Cx is available at: 0x0b40 ~ 0x0b42 */
if (fsp_page_reg_write(psmouse, FSP_PAGE_0B))
goto out;
if (fsp_reg_read(psmouse, FSP_REG_SN0, &v0))
goto out;
if (fsp_reg_read(psmouse, FSP_REG_SN1, &v1))
goto out;
if (fsp_reg_read(psmouse, FSP_REG_SN2, &v2))
goto out;
*sn = (v0 << 16) | (v1 << 8) | v2;
rc = 0;
out:
fsp_page_reg_write(psmouse, FSP_PAGE_DEFAULT);
return rc;
}
static int fsp_get_buttons(struct psmouse *psmouse, int *btn)
{
static const int buttons[] = {
0x16, /* Left/Middle/Right/Forward/Backward & Scroll Up/Down */
0x06, /* Left/Middle/Right & Scroll Up/Down/Right/Left */
0x04, /* Left/Middle/Right & Scroll Up/Down */
0x02, /* Left/Middle/Right */
};
int val;
if (fsp_reg_read(psmouse, FSP_REG_TMOD_STATUS, &val) == -1)
return -EIO;
*btn = buttons[(val & 0x30) >> 4];
return 0;
}
/* Enable on-pad command tag output */
static int fsp_opc_tag_enable(struct psmouse *psmouse, bool enable)
{
int v, nv;
int res = 0;
if (fsp_reg_read(psmouse, FSP_REG_OPC_QDOWN, &v) == -1) {
psmouse_err(psmouse, "Unable get OPC state.\n");
return -EIO;
}
if (enable)
nv = v | FSP_BIT_EN_OPC_TAG;
else
nv = v & ~FSP_BIT_EN_OPC_TAG;
/* only write if necessary */
if (nv != v) {
fsp_reg_write_enable(psmouse, true);
res = fsp_reg_write(psmouse, FSP_REG_OPC_QDOWN, nv);
fsp_reg_write_enable(psmouse, false);
}
if (res != 0) {
psmouse_err(psmouse, "Unable to enable OPC tag.\n");
res = -EIO;
}
return res;
}
static int fsp_onpad_vscr(struct psmouse *psmouse, bool enable)
{
struct fsp_data *pad = psmouse->private;
int val;
if (fsp_reg_read(psmouse, FSP_REG_ONPAD_CTL, &val))
return -EIO;
pad->vscroll = enable;
if (enable)
val |= (FSP_BIT_FIX_VSCR | FSP_BIT_ONPAD_ENABLE);
else
val &= ~FSP_BIT_FIX_VSCR;
if (fsp_reg_write(psmouse, FSP_REG_ONPAD_CTL, val))
return -EIO;
return 0;
}
static int fsp_onpad_hscr(struct psmouse *psmouse, bool enable)
{
struct fsp_data *pad = psmouse->private;
int val, v2;
if (fsp_reg_read(psmouse, FSP_REG_ONPAD_CTL, &val))
return -EIO;
if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &v2))
return -EIO;
pad->hscroll = enable;
if (enable) {
val |= (FSP_BIT_FIX_HSCR | FSP_BIT_ONPAD_ENABLE);
v2 |= FSP_BIT_EN_MSID6;
} else {
val &= ~FSP_BIT_FIX_HSCR;
v2 &= ~(FSP_BIT_EN_MSID6 | FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8);
}
if (fsp_reg_write(psmouse, FSP_REG_ONPAD_CTL, val))
return -EIO;
/* reconfigure horizontal scrolling packet output */
if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, v2))
return -EIO;
return 0;
}
/*
* Write device specific initial parameters.
*
* ex: 0xab 0xcd - write oxcd into register 0xab
*/
static ssize_t fsp_attr_set_setreg(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
unsigned int reg, val;
char *rest;
ssize_t retval;
reg = simple_strtoul(buf, &rest, 16);
if (rest == buf || *rest != ' ' || reg > 0xff)
return -EINVAL;
retval = kstrtouint(rest + 1, 16, &val);
if (retval)
return retval;
if (val > 0xff)
return -EINVAL;
if (fsp_reg_write_enable(psmouse, true))
return -EIO;
retval = fsp_reg_write(psmouse, reg, val) < 0 ? -EIO : count;
fsp_reg_write_enable(psmouse, false);
return retval;
}
PSMOUSE_DEFINE_WO_ATTR(setreg, S_IWUSR, NULL, fsp_attr_set_setreg);
static ssize_t fsp_attr_show_getreg(struct psmouse *psmouse,
void *data, char *buf)
{
struct fsp_data *pad = psmouse->private;
return sprintf(buf, "%02x%02x\n", pad->last_reg, pad->last_val);
}
/*
* Read a register from device.
*
* ex: 0xab -- read content from register 0xab
*/
static ssize_t fsp_attr_set_getreg(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
struct fsp_data *pad = psmouse->private;
unsigned int reg, val;
int err;
err = kstrtouint(buf, 16, ®);
if (err)
return err;
if (reg > 0xff)
return -EINVAL;
if (fsp_reg_read(psmouse, reg, &val))
return -EIO;
pad->last_reg = reg;
pad->last_val = val;
return count;
}
PSMOUSE_DEFINE_ATTR(getreg, S_IWUSR | S_IRUGO, NULL,
fsp_attr_show_getreg, fsp_attr_set_getreg);
static ssize_t fsp_attr_show_pagereg(struct psmouse *psmouse,
void *data, char *buf)
{
int val = 0;
if (fsp_page_reg_read(psmouse, &val))
return -EIO;
return sprintf(buf, "%02x\n", val);
}
static ssize_t fsp_attr_set_pagereg(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
unsigned int val;
int err;
err = kstrtouint(buf, 16, &val);
if (err)
return err;
if (val > 0xff)
return -EINVAL;
if (fsp_page_reg_write(psmouse, val))
return -EIO;
return count;
}
PSMOUSE_DEFINE_ATTR(page, S_IWUSR | S_IRUGO, NULL,
fsp_attr_show_pagereg, fsp_attr_set_pagereg);
static ssize_t fsp_attr_show_vscroll(struct psmouse *psmouse,
void *data, char *buf)
{
struct fsp_data *pad = psmouse->private;
return sprintf(buf, "%d\n", pad->vscroll);
}
static ssize_t fsp_attr_set_vscroll(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
unsigned int val;
int err;
err = kstrtouint(buf, 10, &val);
if (err)
return err;
if (val > 1)
return -EINVAL;
fsp_onpad_vscr(psmouse, val);
return count;
}
PSMOUSE_DEFINE_ATTR(vscroll, S_IWUSR | S_IRUGO, NULL,
fsp_attr_show_vscroll, fsp_attr_set_vscroll);
static ssize_t fsp_attr_show_hscroll(struct psmouse *psmouse,
void *data, char *buf)
{
struct fsp_data *pad = psmouse->private;
return sprintf(buf, "%d\n", pad->hscroll);
}
static ssize_t fsp_attr_set_hscroll(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
unsigned int val;
int err;
err = kstrtouint(buf, 10, &val);
if (err)
return err;
if (val > 1)
return -EINVAL;
fsp_onpad_hscr(psmouse, val);
return count;
}
PSMOUSE_DEFINE_ATTR(hscroll, S_IWUSR | S_IRUGO, NULL,
fsp_attr_show_hscroll, fsp_attr_set_hscroll);
static ssize_t fsp_attr_show_flags(struct psmouse *psmouse,
void *data, char *buf)
{
struct fsp_data *pad = psmouse->private;
return sprintf(buf, "%c\n",
pad->flags & FSPDRV_FLAG_EN_OPC ? 'C' : 'c');
}
static ssize_t fsp_attr_set_flags(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
struct fsp_data *pad = psmouse->private;
size_t i;
for (i = 0; i < count; i++) {
switch (buf[i]) {
case 'C':
pad->flags |= FSPDRV_FLAG_EN_OPC;
break;
case 'c':
pad->flags &= ~FSPDRV_FLAG_EN_OPC;
break;
default:
return -EINVAL;
}
}
return count;
}
PSMOUSE_DEFINE_ATTR(flags, S_IWUSR | S_IRUGO, NULL,
fsp_attr_show_flags, fsp_attr_set_flags);
static ssize_t fsp_attr_show_ver(struct psmouse *psmouse,
void *data, char *buf)
{
return sprintf(buf, "Sentelic FSP kernel module %s\n", fsp_drv_ver);
}
PSMOUSE_DEFINE_RO_ATTR(ver, S_IRUGO, NULL, fsp_attr_show_ver);
static struct attribute *fsp_attributes[] = {
&psmouse_attr_setreg.dattr.attr,
&psmouse_attr_getreg.dattr.attr,
&psmouse_attr_page.dattr.attr,
&psmouse_attr_vscroll.dattr.attr,
&psmouse_attr_hscroll.dattr.attr,
&psmouse_attr_flags.dattr.attr,
&psmouse_attr_ver.dattr.attr,
NULL
};
static struct attribute_group fsp_attribute_group = {
.attrs = fsp_attributes,
};
#ifdef FSP_DEBUG
static void fsp_packet_debug(struct psmouse *psmouse, unsigned char packet[])
{
static unsigned int ps2_packet_cnt;
static unsigned int ps2_last_second;
unsigned int jiffies_msec;
const char *packet_type = "UNKNOWN";
unsigned short abs_x = 0, abs_y = 0;
/* Interpret & dump the packet data. */
switch (packet[0] >> FSP_PKT_TYPE_SHIFT) {
case FSP_PKT_TYPE_ABS:
packet_type = "Absolute";
abs_x = GET_ABS_X(packet);
abs_y = GET_ABS_Y(packet);
break;
case FSP_PKT_TYPE_NORMAL:
packet_type = "Normal";
break;
case FSP_PKT_TYPE_NOTIFY:
packet_type = "Notify";
break;
case FSP_PKT_TYPE_NORMAL_OPC:
packet_type = "Normal-OPC";
break;
}
ps2_packet_cnt++;
jiffies_msec = jiffies_to_msecs(jiffies);
psmouse_dbg(psmouse,
"%08dms %s packets: %02x, %02x, %02x, %02x; "
"abs_x: %d, abs_y: %d\n",
jiffies_msec, packet_type,
packet[0], packet[1], packet[2], packet[3], abs_x, abs_y);
if (jiffies_msec - ps2_last_second > 1000) {
psmouse_dbg(psmouse, "PS/2 packets/sec = %d\n", ps2_packet_cnt);
ps2_packet_cnt = 0;
ps2_last_second = jiffies_msec;
}
}
#else
static void fsp_packet_debug(struct psmouse *psmouse, unsigned char packet[])
{
}
#endif
static void fsp_set_slot(struct input_dev *dev, int slot, bool active,
unsigned int x, unsigned int y)
{
input_mt_slot(dev, slot);
input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
if (active) {
input_report_abs(dev, ABS_MT_POSITION_X, x);
input_report_abs(dev, ABS_MT_POSITION_Y, y);
}
}
static psmouse_ret_t fsp_process_byte(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
struct fsp_data *ad = psmouse->private;
unsigned char *packet = psmouse->packet;
unsigned char button_status = 0, lscroll = 0, rscroll = 0;
unsigned short abs_x, abs_y, fgrs = 0;
if (psmouse->pktcnt < 4)
return PSMOUSE_GOOD_DATA;
/*
* Full packet accumulated, process it
*/
fsp_packet_debug(psmouse, packet);
switch (psmouse->packet[0] >> FSP_PKT_TYPE_SHIFT) {
case FSP_PKT_TYPE_ABS:
if ((packet[0] == 0x48 || packet[0] == 0x49) &&
packet[1] == 0 && packet[2] == 0) {
/*
* Ignore coordinate noise when finger leaving the
* surface, otherwise cursor may jump to upper-left
* corner.
*/
packet[3] &= 0xf0;
}
abs_x = GET_ABS_X(packet);
abs_y = GET_ABS_Y(packet);
if (packet[0] & FSP_PB0_MFMC) {
/*
* MFMC packet: assume that there are two fingers on
* pad
*/
fgrs = 2;
/* MFMC packet */
if (packet[0] & FSP_PB0_MFMC_FGR2) {
/* 2nd finger */
if (ad->last_mt_fgr == 2) {
/*
* workaround for buggy firmware
* which doesn't clear MFMC bit if
* the 1st finger is up
*/
fgrs = 1;
fsp_set_slot(dev, 0, false, 0, 0);
}
ad->last_mt_fgr = 2;
fsp_set_slot(dev, 1, fgrs == 2, abs_x, abs_y);
} else {
/* 1st finger */
if (ad->last_mt_fgr == 1) {
/*
* workaround for buggy firmware
* which doesn't clear MFMC bit if
* the 2nd finger is up
*/
fgrs = 1;
fsp_set_slot(dev, 1, false, 0, 0);
}
ad->last_mt_fgr = 1;
fsp_set_slot(dev, 0, fgrs != 0, abs_x, abs_y);
}
} else {
/* SFAC packet */
if ((packet[0] & (FSP_PB0_LBTN|FSP_PB0_PHY_BTN)) ==
FSP_PB0_LBTN) {
/* On-pad click in SFAC mode should be handled
* by userspace. On-pad clicks in MFMC mode
* are real clickpad clicks, and not ignored.
*/
packet[0] &= ~FSP_PB0_LBTN;
}
/* no multi-finger information */
ad->last_mt_fgr = 0;
if (abs_x != 0 && abs_y != 0)
fgrs = 1;
fsp_set_slot(dev, 0, fgrs > 0, abs_x, abs_y);
fsp_set_slot(dev, 1, false, 0, 0);
}
if (fgrs == 1 || (fgrs == 2 && !(packet[0] & FSP_PB0_MFMC_FGR2))) {
input_report_abs(dev, ABS_X, abs_x);
input_report_abs(dev, ABS_Y, abs_y);
}
input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
input_report_key(dev, BTN_TOUCH, fgrs);
input_report_key(dev, BTN_TOOL_FINGER, fgrs == 1);
input_report_key(dev, BTN_TOOL_DOUBLETAP, fgrs == 2);
break;
case FSP_PKT_TYPE_NORMAL_OPC:
/* on-pad click, filter it if necessary */
if ((ad->flags & FSPDRV_FLAG_EN_OPC) != FSPDRV_FLAG_EN_OPC)
packet[0] &= ~FSP_PB0_LBTN;
fallthrough;
case FSP_PKT_TYPE_NORMAL:
/* normal packet */
/* special packet data translation from on-pad packets */
if (packet[3] != 0) {
if (packet[3] & BIT(0))
button_status |= 0x01; /* wheel down */
if (packet[3] & BIT(1))
button_status |= 0x0f; /* wheel up */
if (packet[3] & BIT(2))
button_status |= BIT(4);/* horizontal left */
if (packet[3] & BIT(3))
button_status |= BIT(5);/* horizontal right */
/* push back to packet queue */
if (button_status != 0)
packet[3] = button_status;
rscroll = (packet[3] >> 4) & 1;
lscroll = (packet[3] >> 5) & 1;
}
/*
* Processing wheel up/down and extra button events
*/
input_report_rel(dev, REL_WHEEL,
(int)(packet[3] & 8) - (int)(packet[3] & 7));
input_report_rel(dev, REL_HWHEEL, lscroll - rscroll);
input_report_key(dev, BTN_BACK, lscroll);
input_report_key(dev, BTN_FORWARD, rscroll);
/*
* Standard PS/2 Mouse
*/
psmouse_report_standard_packet(dev, packet);
break;
}
input_sync(dev);
return PSMOUSE_FULL_PACKET;
}
static int fsp_activate_protocol(struct psmouse *psmouse)
{
struct fsp_data *pad = psmouse->private;
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char param[2];
int val;
/*
* Standard procedure to enter FSP Intellimouse mode
* (scrolling wheel, 4th and 5th buttons)
*/
param[0] = 200;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 200;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 80;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
if (param[0] != 0x04) {
psmouse_err(psmouse,
"Unable to enable 4 bytes packet format.\n");
return -EIO;
}
if (pad->ver < FSP_VER_STL3888_C0) {
/* Preparing relative coordinates output for older hardware */
if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &val)) {
psmouse_err(psmouse,
"Unable to read SYSCTL5 register.\n");
return -EIO;
}
if (fsp_get_buttons(psmouse, &pad->buttons)) {
psmouse_err(psmouse,
"Unable to retrieve number of buttons.\n");
return -EIO;
}
val &= ~(FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8 | FSP_BIT_EN_AUTO_MSID8);
/* Ensure we are not in absolute mode */
val &= ~FSP_BIT_EN_PKT_G0;
if (pad->buttons == 0x06) {
/* Left/Middle/Right & Scroll Up/Down/Right/Left */
val |= FSP_BIT_EN_MSID6;
}
if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, val)) {
psmouse_err(psmouse,
"Unable to set up required mode bits.\n");
return -EIO;
}
/*
* Enable OPC tags such that driver can tell the difference
* between on-pad and real button click
*/
if (fsp_opc_tag_enable(psmouse, true))
psmouse_warn(psmouse,
"Failed to enable OPC tag mode.\n");
/* enable on-pad click by default */
pad->flags |= FSPDRV_FLAG_EN_OPC;
/* Enable on-pad vertical and horizontal scrolling */
fsp_onpad_vscr(psmouse, true);
fsp_onpad_hscr(psmouse, true);
} else {
/* Enable absolute coordinates output for Cx/Dx hardware */
if (fsp_reg_write(psmouse, FSP_REG_SWC1,
FSP_BIT_SWC1_EN_ABS_1F |
FSP_BIT_SWC1_EN_ABS_2F |
FSP_BIT_SWC1_EN_FUP_OUT |
FSP_BIT_SWC1_EN_ABS_CON)) {
psmouse_err(psmouse,
"Unable to enable absolute coordinates output.\n");
return -EIO;
}
}
return 0;
}
static int fsp_set_input_params(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
struct fsp_data *pad = psmouse->private;
if (pad->ver < FSP_VER_STL3888_C0) {
__set_bit(BTN_MIDDLE, dev->keybit);
__set_bit(BTN_BACK, dev->keybit);
__set_bit(BTN_FORWARD, dev->keybit);
__set_bit(REL_WHEEL, dev->relbit);
__set_bit(REL_HWHEEL, dev->relbit);
} else {
/*
* Hardware prior to Cx performs much better in relative mode;
* hence, only enable absolute coordinates output as well as
* multi-touch output for the newer hardware.
*
* Maximum coordinates can be computed as:
*
* number of scanlines * 64 - 57
*
* where number of X/Y scanline lines are 16/12.
*/
int abs_x = 967, abs_y = 711;
__set_bit(EV_ABS, dev->evbit);
__clear_bit(EV_REL, dev->evbit);
__set_bit(BTN_TOUCH, dev->keybit);
__set_bit(BTN_TOOL_FINGER, dev->keybit);
__set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
__set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
input_set_abs_params(dev, ABS_X, 0, abs_x, 0, 0);
input_set_abs_params(dev, ABS_Y, 0, abs_y, 0, 0);
input_mt_init_slots(dev, 2, 0);
input_set_abs_params(dev, ABS_MT_POSITION_X, 0, abs_x, 0, 0);
input_set_abs_params(dev, ABS_MT_POSITION_Y, 0, abs_y, 0, 0);
}
return 0;
}
int fsp_detect(struct psmouse *psmouse, bool set_properties)
{
int id;
if (fsp_reg_read(psmouse, FSP_REG_DEVICE_ID, &id))
return -EIO;
if (id != 0x01)
return -ENODEV;
if (set_properties) {
psmouse->vendor = "Sentelic";
psmouse->name = "FingerSensingPad";
}
return 0;
}
static void fsp_reset(struct psmouse *psmouse)
{
fsp_opc_tag_enable(psmouse, false);
fsp_onpad_vscr(psmouse, false);
fsp_onpad_hscr(psmouse, false);
}
static void fsp_disconnect(struct psmouse *psmouse)
{
sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
&fsp_attribute_group);
fsp_reset(psmouse);
kfree(psmouse->private);
}
static int fsp_reconnect(struct psmouse *psmouse)
{
int version;
if (fsp_detect(psmouse, 0))
return -ENODEV;
if (fsp_get_version(psmouse, &version))
return -ENODEV;
if (fsp_activate_protocol(psmouse))
return -EIO;
return 0;
}
int fsp_init(struct psmouse *psmouse)
{
struct fsp_data *priv;
int ver, rev, sn = 0;
int error;
if (fsp_get_version(psmouse, &ver) ||
fsp_get_revision(psmouse, &rev)) {
return -ENODEV;
}
if (ver >= FSP_VER_STL3888_C0) {
/* firmware information is only available since C0 */
fsp_get_sn(psmouse, &sn);
}
psmouse_info(psmouse,
"Finger Sensing Pad, hw: %d.%d.%d, sn: %x, sw: %s\n",
ver >> 4, ver & 0x0F, rev, sn, fsp_drv_ver);
psmouse->private = priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->ver = ver;
priv->rev = rev;
psmouse->protocol_handler = fsp_process_byte;
psmouse->disconnect = fsp_disconnect;
psmouse->reconnect = fsp_reconnect;
psmouse->cleanup = fsp_reset;
psmouse->pktsize = 4;
error = fsp_activate_protocol(psmouse);
if (error)
goto err_out;
/* Set up various supported input event bits */
error = fsp_set_input_params(psmouse);
if (error)
goto err_out;
error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
&fsp_attribute_group);
if (error) {
psmouse_err(psmouse,
"Failed to create sysfs attributes (%d)", error);
goto err_out;
}
return 0;
err_out:
kfree(psmouse->private);
psmouse->private = NULL;
return error;
}
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