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