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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* PlayStation 1/2 joypads via SPI interface Driver
*
* Copyright (C) 2017 Tomohiro Yoshidomi <sylph23k@gmail.com>
*
* PlayStation 1/2 joypad's plug (not socket)
* 123 456 789
* (...|...|...)
*
* 1: DAT -> MISO (pullup with 1k owm to 3.3V)
* 2: CMD -> MOSI
* 3: 9V (for motor, if not use N.C.)
* 4: GND
* 5: 3.3V
* 6: Attention -> CS(SS)
* 7: SCK -> SCK
* 8: N.C.
* 9: ACK -> N.C.
*/
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/input.h>
#include <linux/input-polldev.h>
#include <linux/module.h>
#include <linux/spi/spi.h>
#include <linux/types.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#define REVERSE_BIT(x) ((((x) & 0x80) >> 7) | (((x) & 0x40) >> 5) | \
(((x) & 0x20) >> 3) | (((x) & 0x10) >> 1) | (((x) & 0x08) << 1) | \
(((x) & 0x04) << 3) | (((x) & 0x02) << 5) | (((x) & 0x01) << 7))
/* PlayStation 1/2 joypad command and response are LSBFIRST. */
/*
* 0x01, 0x42, 0x00, 0x00, 0x00,
* 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
* 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
*/
static const u8 PSX_CMD_POLL[] = {
0x80, 0x42, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
/* 0x01, 0x43, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 */
static const u8 PSX_CMD_ENTER_CFG[] = {
0x80, 0xC2, 0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00
};
/* 0x01, 0x43, 0x00, 0x00, 0x5A, 0x5A, 0x5A, 0x5A, 0x5A */
static const u8 PSX_CMD_EXIT_CFG[] = {
0x80, 0xC2, 0x00, 0x00, 0x5A, 0x5A, 0x5A, 0x5A, 0x5A
};
/* 0x01, 0x4D, 0x00, 0x00, 0x01, 0xFF, 0xFF, 0xFF, 0xFF */
static const u8 PSX_CMD_ENABLE_MOTOR[] = {
0x80, 0xB2, 0x00, 0x00, 0x80, 0xFF, 0xFF, 0xFF, 0xFF
};
struct psxpad {
struct spi_device *spi;
struct input_polled_dev *pdev;
char phys[0x20];
bool motor1enable;
bool motor2enable;
u8 motor1level;
u8 motor2level;
u8 sendbuf[0x20] ____cacheline_aligned;
u8 response[sizeof(PSX_CMD_POLL)] ____cacheline_aligned;
};
static int psxpad_command(struct psxpad *pad, const u8 sendcmdlen)
{
struct spi_transfer xfers = {
.tx_buf = pad->sendbuf,
.rx_buf = pad->response,
.len = sendcmdlen,
};
int err;
err = spi_sync_transfer(pad->spi, &xfers, 1);
if (err) {
dev_err(&pad->spi->dev,
"%s: failed to SPI xfers mode: %d\n",
__func__, err);
return err;
}
return 0;
}
#ifdef CONFIG_JOYSTICK_PSXPAD_SPI_FF
static void psxpad_control_motor(struct psxpad *pad,
bool motor1enable, bool motor2enable)
{
int err;
pad->motor1enable = motor1enable;
pad->motor2enable = motor2enable;
memcpy(pad->sendbuf, PSX_CMD_ENTER_CFG, sizeof(PSX_CMD_ENTER_CFG));
err = psxpad_command(pad, sizeof(PSX_CMD_ENTER_CFG));
if (err) {
dev_err(&pad->spi->dev,
"%s: failed to enter config mode: %d\n",
__func__, err);
return;
}
memcpy(pad->sendbuf, PSX_CMD_ENABLE_MOTOR,
sizeof(PSX_CMD_ENABLE_MOTOR));
pad->sendbuf[3] = pad->motor1enable ? 0x00 : 0xFF;
pad->sendbuf[4] = pad->motor2enable ? 0x80 : 0xFF;
err = psxpad_command(pad, sizeof(PSX_CMD_ENABLE_MOTOR));
if (err) {
dev_err(&pad->spi->dev,
"%s: failed to enable motor mode: %d\n",
__func__, err);
return;
}
memcpy(pad->sendbuf, PSX_CMD_EXIT_CFG, sizeof(PSX_CMD_EXIT_CFG));
err = psxpad_command(pad, sizeof(PSX_CMD_EXIT_CFG));
if (err) {
dev_err(&pad->spi->dev,
"%s: failed to exit config mode: %d\n",
__func__, err);
return;
}
}
static void psxpad_set_motor_level(struct psxpad *pad,
u8 motor1level, u8 motor2level)
{
pad->motor1level = motor1level ? 0xFF : 0x00;
pad->motor2level = REVERSE_BIT(motor2level);
}
static int psxpad_spi_play_effect(struct input_dev *idev,
void *data, struct ff_effect *effect)
{
struct input_polled_dev *pdev = input_get_drvdata(idev);
struct psxpad *pad = pdev->private;
switch (effect->type) {
case FF_RUMBLE:
psxpad_set_motor_level(pad,
(effect->u.rumble.weak_magnitude >> 8) & 0xFFU,
(effect->u.rumble.strong_magnitude >> 8) & 0xFFU);
break;
}
return 0;
}
static int psxpad_spi_init_ff(struct psxpad *pad)
{
int err;
input_set_capability(pad->pdev->input, EV_FF, FF_RUMBLE);
err = input_ff_create_memless(pad->pdev->input, NULL,
psxpad_spi_play_effect);
if (err) {
dev_err(&pad->spi->dev,
"input_ff_create_memless() failed: %d\n", err);
return err;
}
return 0;
}
#else /* CONFIG_JOYSTICK_PSXPAD_SPI_FF */
static void psxpad_control_motor(struct psxpad *pad,
bool motor1enable, bool motor2enable)
{
}
static void psxpad_set_motor_level(struct psxpad *pad,
u8 motor1level, u8 motor2level)
{
}
static inline int psxpad_spi_init_ff(struct psxpad *pad)
{
return 0;
}
#endif /* CONFIG_JOYSTICK_PSXPAD_SPI_FF */
static void psxpad_spi_poll_open(struct input_polled_dev *pdev)
{
struct psxpad *pad = pdev->private;
pm_runtime_get_sync(&pad->spi->dev);
}
static void psxpad_spi_poll_close(struct input_polled_dev *pdev)
{
struct psxpad *pad = pdev->private;
pm_runtime_put_sync(&pad->spi->dev);
}
static void psxpad_spi_poll(struct input_polled_dev *pdev)
{
struct psxpad *pad = pdev->private;
struct input_dev *input = pdev->input;
u8 b_rsp3, b_rsp4;
int err;
psxpad_control_motor(pad, true, true);
memcpy(pad->sendbuf, PSX_CMD_POLL, sizeof(PSX_CMD_POLL));
pad->sendbuf[3] = pad->motor1enable ? pad->motor1level : 0x00;
pad->sendbuf[4] = pad->motor2enable ? pad->motor2level : 0x00;
err = psxpad_command(pad, sizeof(PSX_CMD_POLL));
if (err) {
dev_err(&pad->spi->dev,
"%s: poll command failed mode: %d\n", __func__, err);
return;
}
switch (pad->response[1]) {
case 0xCE: /* 0x73 : analog 1 */
/* button data is inverted */
b_rsp3 = ~pad->response[3];
b_rsp4 = ~pad->response[4];
input_report_abs(input, ABS_X, REVERSE_BIT(pad->response[7]));
input_report_abs(input, ABS_Y, REVERSE_BIT(pad->response[8]));
input_report_abs(input, ABS_RX, REVERSE_BIT(pad->response[5]));
input_report_abs(input, ABS_RY, REVERSE_BIT(pad->response[6]));
input_report_key(input, BTN_DPAD_UP, b_rsp3 & BIT(3));
input_report_key(input, BTN_DPAD_DOWN, b_rsp3 & BIT(1));
input_report_key(input, BTN_DPAD_LEFT, b_rsp3 & BIT(0));
input_report_key(input, BTN_DPAD_RIGHT, b_rsp3 & BIT(2));
input_report_key(input, BTN_X, b_rsp4 & BIT(3));
input_report_key(input, BTN_A, b_rsp4 & BIT(2));
input_report_key(input, BTN_B, b_rsp4 & BIT(1));
input_report_key(input, BTN_Y, b_rsp4 & BIT(0));
input_report_key(input, BTN_TL, b_rsp4 & BIT(5));
input_report_key(input, BTN_TR, b_rsp4 & BIT(4));
input_report_key(input, BTN_TL2, b_rsp4 & BIT(7));
input_report_key(input, BTN_TR2, b_rsp4 & BIT(6));
input_report_key(input, BTN_THUMBL, b_rsp3 & BIT(6));
input_report_key(input, BTN_THUMBR, b_rsp3 & BIT(5));
input_report_key(input, BTN_SELECT, b_rsp3 & BIT(7));
input_report_key(input, BTN_START, b_rsp3 & BIT(4));
break;
case 0x82: /* 0x41 : digital */
/* button data is inverted */
b_rsp3 = ~pad->response[3];
b_rsp4 = ~pad->response[4];
input_report_abs(input, ABS_X, 0x80);
input_report_abs(input, ABS_Y, 0x80);
input_report_abs(input, ABS_RX, 0x80);
input_report_abs(input, ABS_RY, 0x80);
input_report_key(input, BTN_DPAD_UP, b_rsp3 & BIT(3));
input_report_key(input, BTN_DPAD_DOWN, b_rsp3 & BIT(1));
input_report_key(input, BTN_DPAD_LEFT, b_rsp3 & BIT(0));
input_report_key(input, BTN_DPAD_RIGHT, b_rsp3 & BIT(2));
input_report_key(input, BTN_X, b_rsp4 & BIT(3));
input_report_key(input, BTN_A, b_rsp4 & BIT(2));
input_report_key(input, BTN_B, b_rsp4 & BIT(1));
input_report_key(input, BTN_Y, b_rsp4 & BIT(0));
input_report_key(input, BTN_TL, b_rsp4 & BIT(5));
input_report_key(input, BTN_TR, b_rsp4 & BIT(4));
input_report_key(input, BTN_TL2, b_rsp4 & BIT(7));
input_report_key(input, BTN_TR2, b_rsp4 & BIT(6));
input_report_key(input, BTN_THUMBL, false);
input_report_key(input, BTN_THUMBR, false);
input_report_key(input, BTN_SELECT, b_rsp3 & BIT(7));
input_report_key(input, BTN_START, b_rsp3 & BIT(4));
break;
}
input_sync(input);
}
static int psxpad_spi_probe(struct spi_device *spi)
{
struct psxpad *pad;
struct input_polled_dev *pdev;
struct input_dev *idev;
int err;
pad = devm_kzalloc(&spi->dev, sizeof(struct psxpad), GFP_KERNEL);
if (!pad)
return -ENOMEM;
pdev = input_allocate_polled_device();
if (!pdev) {
dev_err(&spi->dev, "failed to allocate input device\n");
return -ENOMEM;
}
/* input poll device settings */
pad->pdev = pdev;
pad->spi = spi;
pdev->private = pad;
pdev->open = psxpad_spi_poll_open;
pdev->close = psxpad_spi_poll_close;
pdev->poll = psxpad_spi_poll;
/* poll interval is about 60fps */
pdev->poll_interval = 16;
pdev->poll_interval_min = 8;
pdev->poll_interval_max = 32;
/* input device settings */
idev = pdev->input;
idev->name = "PlayStation 1/2 joypad";
snprintf(pad->phys, sizeof(pad->phys), "%s/input", dev_name(&spi->dev));
idev->id.bustype = BUS_SPI;
/* key/value map settings */
input_set_abs_params(idev, ABS_X, 0, 255, 0, 0);
input_set_abs_params(idev, ABS_Y, 0, 255, 0, 0);
input_set_abs_params(idev, ABS_RX, 0, 255, 0, 0);
input_set_abs_params(idev, ABS_RY, 0, 255, 0, 0);
input_set_capability(idev, EV_KEY, BTN_DPAD_UP);
input_set_capability(idev, EV_KEY, BTN_DPAD_DOWN);
input_set_capability(idev, EV_KEY, BTN_DPAD_LEFT);
input_set_capability(idev, EV_KEY, BTN_DPAD_RIGHT);
input_set_capability(idev, EV_KEY, BTN_A);
input_set_capability(idev, EV_KEY, BTN_B);
input_set_capability(idev, EV_KEY, BTN_X);
input_set_capability(idev, EV_KEY, BTN_Y);
input_set_capability(idev, EV_KEY, BTN_TL);
input_set_capability(idev, EV_KEY, BTN_TR);
input_set_capability(idev, EV_KEY, BTN_TL2);
input_set_capability(idev, EV_KEY, BTN_TR2);
input_set_capability(idev, EV_KEY, BTN_THUMBL);
input_set_capability(idev, EV_KEY, BTN_THUMBR);
input_set_capability(idev, EV_KEY, BTN_SELECT);
input_set_capability(idev, EV_KEY, BTN_START);
err = psxpad_spi_init_ff(pad);
if (err)
return err;
/* SPI settings */
spi->mode = SPI_MODE_3;
spi->bits_per_word = 8;
/* (PlayStation 1/2 joypad might be possible works 250kHz/500kHz) */
spi->master->min_speed_hz = 125000;
spi->master->max_speed_hz = 125000;
spi_setup(spi);
/* pad settings */
psxpad_set_motor_level(pad, 0, 0);
/* register input poll device */
err = input_register_polled_device(pdev);
if (err) {
dev_err(&spi->dev,
"failed to register input poll device: %d\n", err);
return err;
}
pm_runtime_enable(&spi->dev);
return 0;
}
static int __maybe_unused psxpad_spi_suspend(struct device *dev)
{
struct spi_device *spi = to_spi_device(dev);
struct psxpad *pad = spi_get_drvdata(spi);
psxpad_set_motor_level(pad, 0, 0);
return 0;
}
static SIMPLE_DEV_PM_OPS(psxpad_spi_pm, psxpad_spi_suspend, NULL);
static const struct spi_device_id psxpad_spi_id[] = {
{ "psxpad-spi", 0 },
{ }
};
MODULE_DEVICE_TABLE(spi, psxpad_spi_id);
static struct spi_driver psxpad_spi_driver = {
.driver = {
.name = "psxpad-spi",
.pm = &psxpad_spi_pm,
},
.id_table = psxpad_spi_id,
.probe = psxpad_spi_probe,
};
module_spi_driver(psxpad_spi_driver);
MODULE_AUTHOR("Tomohiro Yoshidomi <sylph23k@gmail.com>");
MODULE_DESCRIPTION("PlayStation 1/2 joypads via SPI interface Driver");
MODULE_LICENSE("GPL");
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