PlayStation 1/2 joypads can be connected directly to the SPI interface.
Signed-off-by: Tomohiro Yoshidomi <sylph23k@xxxxxxxxx>
---
drivers/input/joystick/Kconfig | 22 ++
drivers/input/joystick/Makefile | 1 +
drivers/input/joystick/psxpad-spi.c | 438 ++++++++++++++++++++++++++++++++++++
3 files changed, 461 insertions(+)
create mode 100644 drivers/input/joystick/psxpad-spi.c
diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig
index 4215b538..cbcb9a6e 100644
--- a/drivers/input/joystick/Kconfig
+++ b/drivers/input/joystick/Kconfig
@@ -330,4 +330,26 @@ config JOYSTICK_MAPLE
To compile this as a module choose M here: the module will be called
maplecontrol.
+config JOYSTICK_PSXPAD_SPI
+ tristate "PlayStation 1/2 joypads via SPI interface"
+ depends on SPI
+ select INPUT_POLLDEV
+ help
+ Say Y here if you wish to connect PlayStation 1/2 joypads
+ via SPI interface.
+
+ To compile this driver as a module, choose M here: the
+ module will be called psxpad-spi.
+
+config JOYSTICK_PSXPAD_SPI_FF
+ bool "PlayStation 1/2 joypads force feedback (rumble) support"
+ depends on JOYSTICK_PSXPAD_SPI
+ select INPUT_FF_MEMLESS
+ help
+ Say Y here if you want to take advantage of
+ PlayStation 1/2 joypads rumble features.
+
+ To drive rumble motor,
+ a dedicated power supply is required.
+
endif
diff --git a/drivers/input/joystick/Makefile b/drivers/input/joystick/Makefile
index 92dc0de9..496fd56b 100644
--- a/drivers/input/joystick/Makefile
+++ b/drivers/input/joystick/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_JOYSTICK_INTERACT) += interact.o
obj-$(CONFIG_JOYSTICK_JOYDUMP) += joydump.o
obj-$(CONFIG_JOYSTICK_MAGELLAN) += magellan.o
obj-$(CONFIG_JOYSTICK_MAPLE) += maplecontrol.o
+obj-$(CONFIG_JOYSTICK_PSXPAD_SPI) += psxpad-spi.o
obj-$(CONFIG_JOYSTICK_SIDEWINDER) += sidewinder.o
obj-$(CONFIG_JOYSTICK_SPACEBALL) += spaceball.o
obj-$(CONFIG_JOYSTICK_SPACEORB) += spaceorb.o
diff --git a/drivers/input/joystick/psxpad-spi.c b/drivers/input/joystick/psxpad-spi.c
new file mode 100644
index 00000000..2627aecb
--- /dev/null
+++ b/drivers/input/joystick/psxpad-spi.c
@@ -0,0 +1,438 @@
+/*
+ * PlayStation 1/2 joypads via SPI interface Driver
+ *
+ * Copyright (C) 2017 Tomohiro Yoshidomi <sylph23k@xxxxxxxxx>
+ * Licensed under the GPL-2 or later.
+ *
+ * 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;
+ struct input_dev *idev;
+ 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_setenablemotor(
+ 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);
+}
+#else /* CONFIG_JOYSTICK_PSXPAD_SPI_FF */
+static void psxpad_setenablemotor(
+ struct psxpad *pad, bool motor1enable, bool motor2enable) { }
+
+static void psxpad_set_motor_level(
+ struct psxpad *pad, u8 motor1level, u8 motor2level) { }
+#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;
+ int err;
+
+ psxpad_setenablemotor(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: failed to poll cmd mode: %d\n",
+ __func__, err);
+ return;
+ }
+
+ switch (pad->response[1]) {
+ case 0xCE: /* 0x73 : analog 1 */
+ input_report_abs(pad->idev,
+ ABS_X, REVERSE_BIT(pad->response[7]));
+ input_report_abs(pad->idev,
+ ABS_Y, REVERSE_BIT(pad->response[8]));
+ input_report_abs(pad->idev,
+ ABS_RX, REVERSE_BIT(pad->response[5]));
+ input_report_abs(pad->idev,
+ ABS_RY, REVERSE_BIT(pad->response[6]));
+ input_report_key(pad->idev,
+ BTN_DPAD_UP, !(pad->response[3] & BIT(3)));
+ input_report_key(pad->idev,
+ BTN_DPAD_DOWN, !(pad->response[3] & BIT(1)));
+ input_report_key(pad->idev,
+ BTN_DPAD_LEFT, !(pad->response[3] & BIT(0)));
+ input_report_key(pad->idev,
+ BTN_DPAD_RIGHT, !(pad->response[3] & BIT(2)));
+ input_report_key(pad->idev,
+ BTN_X, !(pad->response[4] & BIT(3)));
+ input_report_key(pad->idev,
+ BTN_A, !(pad->response[4] & BIT(2)));
+ input_report_key(pad->idev,
+ BTN_B, !(pad->response[4] & BIT(1)));
+ input_report_key(pad->idev,
+ BTN_Y, !(pad->response[4] & BIT(0)));
+ input_report_key(pad->idev,
+ BTN_TL, !(pad->response[4] & BIT(5)));
+ input_report_key(pad->idev,
+ BTN_TR, !(pad->response[4] & BIT(4)));
+ input_report_key(pad->idev,
+ BTN_TL2, !(pad->response[4] & BIT(7)));
+ input_report_key(pad->idev,
+ BTN_TR2, !(pad->response[4] & BIT(6)));
+ input_report_key(pad->idev,
+ BTN_THUMBL, !(pad->response[3] & BIT(6)));
+ input_report_key(pad->idev,
+ BTN_THUMBR, !(pad->response[3] & BIT(5)));
+ input_report_key(pad->idev,
+ BTN_SELECT, !(pad->response[3] & BIT(7)));
+ input_report_key(pad->idev,
+ BTN_START, !(pad->response[3] & BIT(4)));
+ break;
+
+ case 0x82: /* 0x41 : digital */
+ input_report_abs(pad->idev,
+ ABS_X, 0x80);
+ input_report_abs(pad->idev,
+ ABS_Y, 0x80);
+ input_report_abs(pad->idev,
+ ABS_RX, 0x80);
+ input_report_abs(pad->idev,
+ ABS_RY, 0x80);
+ input_report_key(pad->idev,
+ BTN_DPAD_UP, !(pad->response[3] & BIT(3)));
+ input_report_key(pad->idev,
+ BTN_DPAD_DOWN, !(pad->response[3] & BIT(1)));
+ input_report_key(pad->idev,
+ BTN_DPAD_LEFT, !(pad->response[3] & BIT(0)));
+ input_report_key(pad->idev,
+ BTN_DPAD_RIGHT, !(pad->response[3] & BIT(2)));
+ input_report_key(pad->idev,
+ BTN_X, !(pad->response[4] & BIT(3)));
+ input_report_key(pad->idev,
+ BTN_A, !(pad->response[4] & BIT(2)));
+ input_report_key(pad->idev,
+ BTN_B, !(pad->response[4] & BIT(1)));
+ input_report_key(pad->idev,
+ BTN_Y, !(pad->response[4] & BIT(0)));
+ input_report_key(pad->idev,
+ BTN_TL, !(pad->response[4] & BIT(5)));
+ input_report_key(pad->idev,
+ BTN_TR, !(pad->response[4] & BIT(4)));
+ input_report_key(pad->idev,
+ BTN_TL2, !(pad->response[4] & BIT(7)));
+ input_report_key(pad->idev,
+ BTN_TR2, !(pad->response[4] & BIT(6)));
+ input_report_key(pad->idev,
+ BTN_THUMBL, false);
+ input_report_key(pad->idev,
+ BTN_THUMBR, false);
+ input_report_key(pad->idev,
+ BTN_SELECT, !(pad->response[3] & BIT(7)));
+ input_report_key(pad->idev,
+ BTN_START, !(pad->response[3] & BIT(4)));
+ break;
+ }
+
+ input_sync(pad->idev);
+}
+
+#ifdef CONFIG_JOYSTICK_PSXPAD_SPI_FF
+static int psxpad_spi_ff(
+ 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->idev, EV_FF, FF_RUMBLE);
+ err = input_ff_create_memless(pad->idev, NULL, psxpad_spi_ff);
+ if (err) {
+ dev_err(&pad->spi->dev,
+ "%s: failed to ff alloc mode: %d\n",
+ __func__, err);
+ }
+
+ return err;
+}
+#else /* CONFIG_JOYSTICK_PSXPAD_SPI_FF */
+static inline int psxpad_spi_init_ff(struct psxpad *pad)
+{
+ return 0;
+}
+#endif /* CONFIG_JOYSTICK_PSXPAD_SPI_FF */
+
+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,
+ "%s: failed to pdev alloc\n",
+ __func__);
+ return -ENOMEM;
+ }
+
+ /* input poll device settings */
+ pad->pdev = pdev;
+ pad->spi = spi;
+ pad->motor1enable = false;
+ pad->motor2enable = false;
+ 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;
+ pad->idev = idev;
+ 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);
+
+ /* force feedback */
+ err = psxpad_spi_init_ff(pad);
+ if (err) {
+ dev_err(&spi->dev,
+ "%s: failed to init ff mode: %d\n",
+ __func__, 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,
+ "%s: failed to register input poll device: %d\n",
+ __func__, 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 int __maybe_unused psxpad_spi_resume(struct device *dev)
+{
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(psxpad_spi_pm, psxpad_spi_suspend, psxpad_spi_resume);
+
+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@xxxxxxxxx>");
+MODULE_DESCRIPTION("PlayStation 1/2 joypads via SPI interface Driver");
+MODULE_LICENSE("GPL");
--
2.11.0
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