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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
| commit | f4cdf7ca9a1fdcca413157df19753f388a5a224e (patch) | |
| tree | 60a31895b2446cd7fa27514e8c2843534a0de0da /drivers/input/joystick/cobra.c | |
| download | linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip | |
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
Pull media updates from Mauro Carvalho Chehab:
- v4l2-core: added ISP statistics support and per-block validation
- v4l2-core: Allow unknown HDR10 white point and luminance
- New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor
- New codec: Milos: VPU v2.0 codec support
- isp driver: gained support for Dreamchip RPPX1 ISP framework
- vsp1 driver: gained support for RZ/T2H and RZ/N2H
- Novalake driver: gained CVS support for new NVL hardware
- dvb-core: fix feed leak on failed DMX_ADD_PID
- several driver fixes, cleanups and minor improvements
* tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits)
media: ipu-bridge: check all DMI entries when overriding sensor rotation
media: v4l2-async: avoid deleting unlinked ASC entry on link error
media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement
media: intel/ipu6: fix async notifier cleanup leak on parse error
media: staging/ipu7: fix async notifier UAF on probe error path
media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
media: rcar-isp: Fix VSPX reference leaks
media: rcar-isp: Release ISPCORE resources
media: i2c: imx415: Release runtime PM reference on VBLANK error
media: i2c: imx415: Return test pattern write errors
media: renesas: vsp1: Declare index variables in for loop statement
media: renesas: vsp1: Make reset control optional to support platforms without a reset line
media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs
media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs
media: nxp: imx8-isi: Add additional 32-bit RGB format support
media: nxp: imx8-isi: Add 16-bit raw Bayer format support
media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams
media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks
media: nxp: imx8-isi: Correct color map between V4L2 and ISI
...
Diffstat (limited to 'drivers/input/joystick/cobra.c')
| -rw-r--r-- | drivers/input/joystick/cobra.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/drivers/input/joystick/cobra.c b/drivers/input/joystick/cobra.c new file mode 100644 index 000000000..ffa6d49c8 --- /dev/null +++ b/drivers/input/joystick/cobra.c @@ -0,0 +1,244 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 1999-2001 Vojtech Pavlik + */ + +/* + * Creative Labs Blaster GamePad Cobra driver for Linux + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/gameport.h> +#include <linux/input.h> +#include <linux/jiffies.h> + +#define DRIVER_DESC "Creative Labs Blaster GamePad Cobra driver" + +MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + +#define COBRA_MAX_STROBE 45 /* 45 us max wait for first strobe */ +#define COBRA_LENGTH 36 + +static int cobra_btn[] = { BTN_START, BTN_SELECT, BTN_TL, BTN_TR, BTN_X, BTN_Y, BTN_Z, BTN_A, BTN_B, BTN_C, BTN_TL2, BTN_TR2, 0 }; + +struct cobra { + struct gameport *gameport; + struct input_dev *dev[2]; + int reads; + int bads; + unsigned char exists; + char phys[2][32]; +}; + +static unsigned char cobra_read_packet(struct gameport *gameport, unsigned int *data) +{ + unsigned long flags; + unsigned char u, v, w; + __u64 buf[2]; + int r[2], t[2]; + int i, j, ret; + + int strobe = gameport_time(gameport, COBRA_MAX_STROBE); + + for (i = 0; i < 2; i++) { + r[i] = buf[i] = 0; + t[i] = COBRA_MAX_STROBE; + } + + local_irq_save(flags); + + u = gameport_read(gameport); + + do { + t[0]--; t[1]--; + v = gameport_read(gameport); + for (i = 0, w = u ^ v; i < 2 && w; i++, w >>= 2) + if (w & 0x30) { + if ((w & 0x30) < 0x30 && r[i] < COBRA_LENGTH && t[i] > 0) { + buf[i] |= (__u64)((w >> 5) & 1) << r[i]++; + t[i] = strobe; + u = v; + } else t[i] = 0; + } + } while (t[0] > 0 || t[1] > 0); + + local_irq_restore(flags); + + ret = 0; + + for (i = 0; i < 2; i++) { + + if (r[i] != COBRA_LENGTH) continue; + + for (j = 0; j < COBRA_LENGTH && (buf[i] & 0x04104107f) ^ 0x041041040; j++) + buf[i] = (buf[i] >> 1) | ((__u64)(buf[i] & 1) << (COBRA_LENGTH - 1)); + + if (j < COBRA_LENGTH) ret |= (1 << i); + + data[i] = ((buf[i] >> 7) & 0x000001f) | ((buf[i] >> 8) & 0x00003e0) + | ((buf[i] >> 9) & 0x0007c00) | ((buf[i] >> 10) & 0x00f8000) + | ((buf[i] >> 11) & 0x1f00000); + + } + + return ret; +} + +static void cobra_poll(struct gameport *gameport) +{ + struct cobra *cobra = gameport_get_drvdata(gameport); + struct input_dev *dev; + unsigned int data[2]; + int i, j, r; + + cobra->reads++; + + if ((r = cobra_read_packet(gameport, data)) != cobra->exists) { + cobra->bads++; + return; + } + + for (i = 0; i < 2; i++) + if (cobra->exists & r & (1 << i)) { + + dev = cobra->dev[i]; + + input_report_abs(dev, ABS_X, ((data[i] >> 4) & 1) - ((data[i] >> 3) & 1)); + input_report_abs(dev, ABS_Y, ((data[i] >> 2) & 1) - ((data[i] >> 1) & 1)); + + for (j = 0; cobra_btn[j]; j++) + input_report_key(dev, cobra_btn[j], data[i] & (0x20 << j)); + + input_sync(dev); + + } +} + +static int cobra_open(struct input_dev *dev) +{ + struct cobra *cobra = input_get_drvdata(dev); + + gameport_start_polling(cobra->gameport); + return 0; +} + +static void cobra_close(struct input_dev *dev) +{ + struct cobra *cobra = input_get_drvdata(dev); + + gameport_stop_polling(cobra->gameport); +} + +static int cobra_connect(struct gameport *gameport, struct gameport_driver *drv) +{ + struct cobra *cobra; + struct input_dev *input_dev; + unsigned int data[2]; + int i, j; + int err; + + cobra = kzalloc_obj(*cobra); + if (!cobra) + return -ENOMEM; + + cobra->gameport = gameport; + + gameport_set_drvdata(gameport, cobra); + + err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); + if (err) + goto fail1; + + cobra->exists = cobra_read_packet(gameport, data); + + for (i = 0; i < 2; i++) + if ((cobra->exists >> i) & data[i] & 1) { + printk(KERN_WARNING "cobra.c: Device %d on %s has the Ext bit set. ID is: %d" + " Contact vojtech@ucw.cz\n", i, gameport->phys, (data[i] >> 2) & 7); + cobra->exists &= ~(1 << i); + } + + if (!cobra->exists) { + err = -ENODEV; + goto fail2; + } + + gameport_set_poll_handler(gameport, cobra_poll); + gameport_set_poll_interval(gameport, 20); + + for (i = 0; i < 2; i++) { + if (~(cobra->exists >> i) & 1) + continue; + + cobra->dev[i] = input_dev = input_allocate_device(); + if (!input_dev) { + err = -ENOMEM; + goto fail3; + } + + snprintf(cobra->phys[i], sizeof(cobra->phys[i]), + "%s/input%d", gameport->phys, i); + + input_dev->name = "Creative Labs Blaster GamePad Cobra"; + input_dev->phys = cobra->phys[i]; + input_dev->id.bustype = BUS_GAMEPORT; + input_dev->id.vendor = GAMEPORT_ID_VENDOR_CREATIVE; + input_dev->id.product = 0x0008; + input_dev->id.version = 0x0100; + input_dev->dev.parent = &gameport->dev; + + input_set_drvdata(input_dev, cobra); + + input_dev->open = cobra_open; + input_dev->close = cobra_close; + + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0); + input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0); + for (j = 0; cobra_btn[j]; j++) + set_bit(cobra_btn[j], input_dev->keybit); + + err = input_register_device(cobra->dev[i]); + if (err) + goto fail4; + } + + return 0; + + fail4: input_free_device(cobra->dev[i]); + fail3: while (--i >= 0) + if (cobra->dev[i]) + input_unregister_device(cobra->dev[i]); + fail2: gameport_close(gameport); + fail1: gameport_set_drvdata(gameport, NULL); + kfree(cobra); + return err; +} + +static void cobra_disconnect(struct gameport *gameport) +{ + struct cobra *cobra = gameport_get_drvdata(gameport); + int i; + + for (i = 0; i < 2; i++) + if ((cobra->exists >> i) & 1) + input_unregister_device(cobra->dev[i]); + gameport_close(gameport); + gameport_set_drvdata(gameport, NULL); + kfree(cobra); +} + +static struct gameport_driver cobra_drv = { + .driver = { + .name = "cobra", + }, + .description = DRIVER_DESC, + .connect = cobra_connect, + .disconnect = cobra_disconnect, +}; + +module_gameport_driver(cobra_drv); |
