diff options
| -rw-r--r-- | drivers/input/serio/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/input/serio/Makefile | 1 | ||||
| -rw-r--r-- | drivers/input/serio/xilinx_ps2.c | 363 |
3 files changed, 0 insertions, 374 deletions
diff --git a/drivers/input/serio/Kconfig b/drivers/input/serio/Kconfig index 5f15a6462056..bacab1f58400 100644 --- a/drivers/input/serio/Kconfig +++ b/drivers/input/serio/Kconfig @@ -188,16 +188,6 @@ config SERIO_RAW To compile this driver as a module, choose M here: the module will be called serio_raw. -config SERIO_XILINX_XPS_PS2 - tristate "Xilinx XPS PS/2 Controller Support" - depends on PPC || MICROBLAZE - help - This driver supports XPS PS/2 IP from the Xilinx EDK on - PowerPC platform. - - To compile this driver as a module, choose M here: the - module will be called xilinx_ps2. - config SERIO_ALTERA_PS2 tristate "Altera UP PS/2 controller" depends on HAS_IOMEM diff --git a/drivers/input/serio/Makefile b/drivers/input/serio/Makefile index 8ab98f4aa28d..7f5137dc02e2 100644 --- a/drivers/input/serio/Makefile +++ b/drivers/input/serio/Makefile @@ -23,7 +23,6 @@ obj-$(CONFIG_SERIO_SGI_IOC3) += ioc3kbd.o obj-$(CONFIG_SERIO_LIBPS2) += libps2.o obj-$(CONFIG_SERIO_RAW) += serio_raw.o obj-$(CONFIG_SERIO_AMS_DELTA) += ams_delta_serio.o -obj-$(CONFIG_SERIO_XILINX_XPS_PS2) += xilinx_ps2.o obj-$(CONFIG_SERIO_ALTERA_PS2) += altera_ps2.o obj-$(CONFIG_SERIO_ARC_PS2) += arc_ps2.o obj-$(CONFIG_SERIO_APBPS2) += apbps2.o diff --git a/drivers/input/serio/xilinx_ps2.c b/drivers/input/serio/xilinx_ps2.c deleted file mode 100644 index 411d55ca1a66..000000000000 --- a/drivers/input/serio/xilinx_ps2.c +++ /dev/null @@ -1,363 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * Xilinx XPS PS/2 device driver - * - * (c) 2005 MontaVista Software, Inc. - * (c) 2008 Xilinx, Inc. - */ - - -#include <linux/module.h> -#include <linux/serio.h> -#include <linux/interrupt.h> -#include <linux/errno.h> -#include <linux/slab.h> -#include <linux/list.h> -#include <linux/io.h> -#include <linux/mod_devicetable.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> -#include <linux/platform_device.h> - -#define DRIVER_NAME "xilinx_ps2" - -/* Register offsets for the xps2 device */ -#define XPS2_SRST_OFFSET 0x00000000 /* Software Reset register */ -#define XPS2_STATUS_OFFSET 0x00000004 /* Status register */ -#define XPS2_RX_DATA_OFFSET 0x00000008 /* Receive Data register */ -#define XPS2_TX_DATA_OFFSET 0x0000000C /* Transmit Data register */ -#define XPS2_GIER_OFFSET 0x0000002C /* Global Interrupt Enable reg */ -#define XPS2_IPISR_OFFSET 0x00000030 /* Interrupt Status register */ -#define XPS2_IPIER_OFFSET 0x00000038 /* Interrupt Enable register */ - -/* Reset Register Bit Definitions */ -#define XPS2_SRST_RESET 0x0000000A /* Software Reset */ - -/* Status Register Bit Positions */ -#define XPS2_STATUS_RX_FULL 0x00000001 /* Receive Full */ -#define XPS2_STATUS_TX_FULL 0x00000002 /* Transmit Full */ - -/* - * Bit definitions for ISR/IER registers. Both the registers have the same bit - * definitions and are only defined once. - */ -#define XPS2_IPIXR_WDT_TOUT 0x00000001 /* Watchdog Timeout Interrupt */ -#define XPS2_IPIXR_TX_NOACK 0x00000002 /* Transmit No ACK Interrupt */ -#define XPS2_IPIXR_TX_ACK 0x00000004 /* Transmit ACK (Data) Interrupt */ -#define XPS2_IPIXR_RX_OVF 0x00000008 /* Receive Overflow Interrupt */ -#define XPS2_IPIXR_RX_ERR 0x00000010 /* Receive Error Interrupt */ -#define XPS2_IPIXR_RX_FULL 0x00000020 /* Receive Data Interrupt */ - -/* Mask for all the Transmit Interrupts */ -#define XPS2_IPIXR_TX_ALL (XPS2_IPIXR_TX_NOACK | XPS2_IPIXR_TX_ACK) - -/* Mask for all the Receive Interrupts */ -#define XPS2_IPIXR_RX_ALL (XPS2_IPIXR_RX_OVF | XPS2_IPIXR_RX_ERR | \ - XPS2_IPIXR_RX_FULL) - -/* Mask for all the Interrupts */ -#define XPS2_IPIXR_ALL (XPS2_IPIXR_TX_ALL | XPS2_IPIXR_RX_ALL | \ - XPS2_IPIXR_WDT_TOUT) - -/* Global Interrupt Enable mask */ -#define XPS2_GIER_GIE_MASK 0x80000000 - -struct xps2data { - int irq; - spinlock_t lock; - void __iomem *base_address; /* virt. address of control registers */ - unsigned int flags; - struct serio *serio; /* serio */ - struct device *dev; -}; - -/************************************/ -/* XPS PS/2 data transmission calls */ -/************************************/ - -/** - * xps2_recv() - attempts to receive a byte from the PS/2 port. - * @drvdata: pointer to ps2 device private data structure - * @byte: address where the read data will be copied - * - * If there is any data available in the PS/2 receiver, this functions reads - * the data, otherwise it returns error. - */ -static int xps2_recv(struct xps2data *drvdata, u8 *byte) -{ - u32 sr; - int status = -1; - - /* If there is data available in the PS/2 receiver, read it */ - sr = in_be32(drvdata->base_address + XPS2_STATUS_OFFSET); - if (sr & XPS2_STATUS_RX_FULL) { - *byte = in_be32(drvdata->base_address + XPS2_RX_DATA_OFFSET); - status = 0; - } - - return status; -} - -/*********************/ -/* Interrupt handler */ -/*********************/ -static irqreturn_t xps2_interrupt(int irq, void *dev_id) -{ - struct xps2data *drvdata = dev_id; - u32 intr_sr; - u8 c; - int status; - - /* Get the PS/2 interrupts and clear them */ - intr_sr = in_be32(drvdata->base_address + XPS2_IPISR_OFFSET); - out_be32(drvdata->base_address + XPS2_IPISR_OFFSET, intr_sr); - - /* Check which interrupt is active */ - if (intr_sr & XPS2_IPIXR_RX_OVF) - dev_warn(drvdata->dev, "receive overrun error\n"); - - if (intr_sr & XPS2_IPIXR_RX_ERR) - drvdata->flags |= SERIO_PARITY; - - if (intr_sr & (XPS2_IPIXR_TX_NOACK | XPS2_IPIXR_WDT_TOUT)) - drvdata->flags |= SERIO_TIMEOUT; - - if (intr_sr & XPS2_IPIXR_RX_FULL) { - status = xps2_recv(drvdata, &c); - - /* Error, if a byte is not received */ - if (status) { - dev_err(drvdata->dev, - "wrong rcvd byte count (%d)\n", status); - } else { - serio_interrupt(drvdata->serio, c, drvdata->flags); - drvdata->flags = 0; - } - } - - return IRQ_HANDLED; -} - -/*******************/ -/* serio callbacks */ -/*******************/ - -/** - * sxps2_write() - sends a byte out through the PS/2 port. - * @pserio: pointer to the serio structure of the PS/2 port - * @c: data that needs to be written to the PS/2 port - * - * This function checks if the PS/2 transmitter is empty and sends a byte. - * Otherwise it returns error. Transmission fails only when nothing is connected - * to the PS/2 port. Thats why, we do not try to resend the data in case of a - * failure. - */ -static int sxps2_write(struct serio *pserio, unsigned char c) -{ - struct xps2data *drvdata = pserio->port_data; - u32 sr; - - guard(spinlock_irqsave)(&drvdata->lock); - - /* If the PS/2 transmitter is empty send a byte of data */ - sr = in_be32(drvdata->base_address + XPS2_STATUS_OFFSET); - if (sr & XPS2_STATUS_TX_FULL) - return -EAGAIN; - - out_be32(drvdata->base_address + XPS2_TX_DATA_OFFSET, c); - return 0; -} - -/** - * sxps2_open() - called when a port is opened by the higher layer. - * @pserio: pointer to the serio structure of the PS/2 device - * - * This function requests irq and enables interrupts for the PS/2 device. - */ -static int sxps2_open(struct serio *pserio) -{ - struct xps2data *drvdata = pserio->port_data; - int error; - u8 c; - - error = request_irq(drvdata->irq, &xps2_interrupt, 0, - DRIVER_NAME, drvdata); - if (error) { - dev_err(drvdata->dev, - "Couldn't allocate interrupt %d\n", drvdata->irq); - return error; - } - - /* start reception by enabling the interrupts */ - out_be32(drvdata->base_address + XPS2_GIER_OFFSET, XPS2_GIER_GIE_MASK); - out_be32(drvdata->base_address + XPS2_IPIER_OFFSET, XPS2_IPIXR_RX_ALL); - (void)xps2_recv(drvdata, &c); - - return 0; /* success */ -} - -/** - * sxps2_close() - frees the interrupt. - * @pserio: pointer to the serio structure of the PS/2 device - * - * This function frees the irq and disables interrupts for the PS/2 device. - */ -static void sxps2_close(struct serio *pserio) -{ - struct xps2data *drvdata = pserio->port_data; - - /* Disable the PS2 interrupts */ - out_be32(drvdata->base_address + XPS2_GIER_OFFSET, 0x00); - out_be32(drvdata->base_address + XPS2_IPIER_OFFSET, 0x00); - free_irq(drvdata->irq, drvdata); -} - -/** - * xps2_of_probe - probe method for the PS/2 device. - * @ofdev: pointer to OF device structure - * - * This function probes the PS/2 device in the device tree. - * It initializes the driver data structure and the hardware. - * It returns 0, if the driver is bound to the PS/2 device, or a negative - * value if there is an error. - */ -static int xps2_of_probe(struct platform_device *ofdev) -{ - struct resource r_mem; /* IO mem resources */ - struct xps2data *drvdata; - struct serio *serio; - struct device *dev = &ofdev->dev; - resource_size_t remap_size, phys_addr; - unsigned int irq; - int error; - - dev_info(dev, "Device Tree Probing \'%pOFn\'\n", dev->of_node); - - /* Get iospace for the device */ - error = of_address_to_resource(dev->of_node, 0, &r_mem); - if (error) { - dev_err(dev, "invalid address\n"); - return error; - } - - /* Get IRQ for the device */ - irq = irq_of_parse_and_map(dev->of_node, 0); - if (!irq) { - dev_err(dev, "no IRQ found\n"); - return -ENODEV; - } - - drvdata = kzalloc_obj(*drvdata); - serio = kzalloc_obj(*serio); - if (!drvdata || !serio) { - error = -ENOMEM; - goto failed1; - } - - spin_lock_init(&drvdata->lock); - drvdata->irq = irq; - drvdata->serio = serio; - drvdata->dev = dev; - - phys_addr = r_mem.start; - remap_size = resource_size(&r_mem); - if (!request_mem_region(phys_addr, remap_size, DRIVER_NAME)) { - dev_err(dev, "Couldn't lock memory region at 0x%08llX\n", - (unsigned long long)phys_addr); - error = -EBUSY; - goto failed1; - } - - /* Fill in configuration data and add them to the list */ - drvdata->base_address = ioremap(phys_addr, remap_size); - if (drvdata->base_address == NULL) { - dev_err(dev, "Couldn't ioremap memory at 0x%08llX\n", - (unsigned long long)phys_addr); - error = -EFAULT; - goto failed2; - } - - /* Disable all the interrupts, just in case */ - out_be32(drvdata->base_address + XPS2_IPIER_OFFSET, 0); - - /* - * Reset the PS2 device and abort any current transaction, - * to make sure we have the PS2 in a good state. - */ - out_be32(drvdata->base_address + XPS2_SRST_OFFSET, XPS2_SRST_RESET); - - dev_info(dev, "Xilinx PS2 at 0x%08llX mapped to 0x%p, irq=%d\n", - (unsigned long long)phys_addr, drvdata->base_address, - drvdata->irq); - - serio->id.type = SERIO_8042; - serio->write = sxps2_write; - serio->open = sxps2_open; - serio->close = sxps2_close; - serio->port_data = drvdata; - serio->dev.parent = dev; - snprintf(serio->name, sizeof(serio->name), - "Xilinx XPS PS/2 at %08llX", (unsigned long long)phys_addr); - snprintf(serio->phys, sizeof(serio->phys), - "xilinxps2/serio at %08llX", (unsigned long long)phys_addr); - - serio_register_port(serio); - - platform_set_drvdata(ofdev, drvdata); - return 0; /* success */ - -failed2: - release_mem_region(phys_addr, remap_size); -failed1: - kfree(serio); - kfree(drvdata); - - return error; -} - -/** - * xps2_of_remove - unbinds the driver from the PS/2 device. - * @of_dev: pointer to OF device structure - * - * This function is called if a device is physically removed from the system or - * if the driver module is being unloaded. It frees any resources allocated to - * the device. - */ -static void xps2_of_remove(struct platform_device *of_dev) -{ - struct xps2data *drvdata = platform_get_drvdata(of_dev); - struct resource r_mem; /* IO mem resources */ - - serio_unregister_port(drvdata->serio); - iounmap(drvdata->base_address); - - /* Get iospace of the device */ - if (of_address_to_resource(of_dev->dev.of_node, 0, &r_mem)) - dev_err(drvdata->dev, "invalid address\n"); - else - release_mem_region(r_mem.start, resource_size(&r_mem)); - - kfree(drvdata); -} - -/* Match table for of_platform binding */ -static const struct of_device_id xps2_of_match[] = { - { .compatible = "xlnx,xps-ps2-1.00.a", }, - { /* end of list */ }, -}; -MODULE_DEVICE_TABLE(of, xps2_of_match); - -static struct platform_driver xps2_of_driver = { - .driver = { - .name = DRIVER_NAME, - .of_match_table = xps2_of_match, - }, - .probe = xps2_of_probe, - .remove = xps2_of_remove, -}; -module_platform_driver(xps2_of_driver); - -MODULE_AUTHOR("Xilinx, Inc."); -MODULE_DESCRIPTION("Xilinx XPS PS/2 driver"); -MODULE_LICENSE("GPL"); - |