From f4cdf7ca9a1fdcca413157df19753f388a5a224e Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 19 Aug 2026 10:09:22 -0700 Subject: Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 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 ... --- drivers/input/serio/q40kbd.c | 166 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 166 insertions(+) create mode 100644 drivers/input/serio/q40kbd.c (limited to 'drivers/input/serio/q40kbd.c') diff --git a/drivers/input/serio/q40kbd.c b/drivers/input/serio/q40kbd.c new file mode 100644 index 000000000..2f553efbe --- /dev/null +++ b/drivers/input/serio/q40kbd.c @@ -0,0 +1,166 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2000-2001 Vojtech Pavlik + * + * Based on the work of: + * Richard Zidlicky + */ + +/* + * Q40 PS/2 keyboard controller driver for Linux/m68k + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#define DRV_NAME "q40kbd" + +MODULE_AUTHOR("Vojtech Pavlik "); +MODULE_DESCRIPTION("Q40 PS/2 keyboard controller driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRV_NAME); + +struct q40kbd { + struct serio *port; + spinlock_t lock; +}; + +static irqreturn_t q40kbd_interrupt(int irq, void *dev_id) +{ + struct q40kbd *q40kbd = dev_id; + + guard(spinlock_irqsave)(&q40kbd->lock); + + if (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG)) + serio_interrupt(q40kbd->port, master_inb(KEYCODE_REG), 0); + + master_outb(-1, KEYBOARD_UNLOCK_REG); + + return IRQ_HANDLED; +} + +/* + * q40kbd_flush() flushes all data that may be in the keyboard buffers + */ + +static void q40kbd_flush(struct q40kbd *q40kbd) +{ + int maxread = 100; + + guard(spinlock_irqsave)(&q40kbd->lock); + + while (maxread-- && (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG))) + master_inb(KEYCODE_REG); +} + +static void q40kbd_stop(void) +{ + master_outb(0, KEY_IRQ_ENABLE_REG); + master_outb(-1, KEYBOARD_UNLOCK_REG); +} + +/* + * q40kbd_open() is called when a port is open by the higher layer. + * It allocates the interrupt and enables in in the chip. + */ + +static int q40kbd_open(struct serio *port) +{ + struct q40kbd *q40kbd = port->port_data; + + q40kbd_flush(q40kbd); + + /* off we go */ + master_outb(-1, KEYBOARD_UNLOCK_REG); + master_outb(1, KEY_IRQ_ENABLE_REG); + + return 0; +} + +static void q40kbd_close(struct serio *port) +{ + struct q40kbd *q40kbd = port->port_data; + + q40kbd_stop(); + q40kbd_flush(q40kbd); +} + +static int q40kbd_probe(struct platform_device *pdev) +{ + struct q40kbd *q40kbd; + struct serio *port; + int error; + + q40kbd = kzalloc_obj(*q40kbd); + port = kzalloc_obj(*port); + if (!q40kbd || !port) { + error = -ENOMEM; + goto err_free_mem; + } + + q40kbd->port = port; + spin_lock_init(&q40kbd->lock); + + port->id.type = SERIO_8042; + port->open = q40kbd_open; + port->close = q40kbd_close; + port->port_data = q40kbd; + port->dev.parent = &pdev->dev; + strscpy(port->name, "Q40 Kbd Port", sizeof(port->name)); + strscpy(port->phys, "Q40", sizeof(port->phys)); + + q40kbd_stop(); + + error = request_irq(Q40_IRQ_KEYBOARD, q40kbd_interrupt, 0, + DRV_NAME, q40kbd); + if (error) { + dev_err(&pdev->dev, "Can't get irq %d.\n", Q40_IRQ_KEYBOARD); + goto err_free_mem; + } + + serio_register_port(q40kbd->port); + + platform_set_drvdata(pdev, q40kbd); + printk(KERN_INFO "serio: Q40 kbd registered\n"); + + return 0; + +err_free_mem: + kfree(port); + kfree(q40kbd); + return error; +} + +static void q40kbd_remove(struct platform_device *pdev) +{ + struct q40kbd *q40kbd = platform_get_drvdata(pdev); + + /* + * q40kbd_close() will be called as part of unregistering + * and will ensure that IRQ is turned off, so it is safe + * to unregister port first and free IRQ later. + */ + serio_unregister_port(q40kbd->port); + free_irq(Q40_IRQ_KEYBOARD, q40kbd); + kfree(q40kbd); +} + +static struct platform_driver q40kbd_driver = { + .driver = { + .name = "q40kbd", + }, + .remove = q40kbd_remove, +}; + +module_platform_driver_probe(q40kbd_driver, q40kbd_probe); -- cgit v1.3.1