tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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Input: ct82c710 - remove driver

This is a PS/2 mouse interface chip from Chips & Technologies that was
used in TI TravelMate and Gateway Nomad laptops, which used 386 and 486
CPUs. With 486 support being removed from the kernel (and 386 support is
long gone) it is time to retire this driver as well.

Remove the driver.

Link: https://patch.msgid.link/20240808172733.1194442-6-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Dmitry Torokhov f7a78e84 86a9e4f4

-253
-13
drivers/input/serio/Kconfig
··· 55 55 To compile this driver as a module, choose M here: the 56 56 module will be called serport. 57 57 58 - config SERIO_CT82C710 59 - tristate "ct82c710 Aux port controller" 60 - depends on X86 61 - help 62 - Say Y here if you have a Texas Instruments TravelMate notebook 63 - equipped with the ct82c710 chip and want to use a mouse connected 64 - to the "QuickPort". 65 - 66 - If unsure, say N. 67 - 68 - To compile this driver as a module, choose M here: the 69 - module will be called ct82c710. 70 - 71 58 config SERIO_Q40KBD 72 59 tristate "Q40 keyboard controller" 73 60 depends on Q40
-1
drivers/input/serio/Makefile
··· 9 9 obj-$(CONFIG_SERIO_I8042) += i8042.o 10 10 obj-$(CONFIG_SERIO_PARKBD) += parkbd.o 11 11 obj-$(CONFIG_SERIO_SERPORT) += serport.o 12 - obj-$(CONFIG_SERIO_CT82C710) += ct82c710.o 13 12 obj-$(CONFIG_SERIO_RPCKBD) += rpckbd.o 14 13 obj-$(CONFIG_SERIO_SA1111) += sa1111ps2.o 15 14 obj-$(CONFIG_SERIO_AMBAKMI) += ambakmi.o
-239
drivers/input/serio/ct82c710.c
··· 1 - // SPDX-License-Identifier: GPL-2.0-or-later 2 - /* 3 - * Copyright (c) 1999-2001 Vojtech Pavlik 4 - */ 5 - 6 - /* 7 - * 82C710 C&T mouse port chip driver for Linux 8 - */ 9 - 10 - #include <linux/delay.h> 11 - #include <linux/module.h> 12 - #include <linux/ioport.h> 13 - #include <linux/init.h> 14 - #include <linux/interrupt.h> 15 - #include <linux/serio.h> 16 - #include <linux/errno.h> 17 - #include <linux/err.h> 18 - #include <linux/platform_device.h> 19 - #include <linux/slab.h> 20 - 21 - #include <asm/io.h> 22 - 23 - MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 24 - MODULE_DESCRIPTION("82C710 C&T mouse port chip driver"); 25 - MODULE_LICENSE("GPL"); 26 - 27 - /* 28 - * ct82c710 interface 29 - */ 30 - 31 - #define CT82C710_DEV_IDLE 0x01 /* Device Idle */ 32 - #define CT82C710_RX_FULL 0x02 /* Device Char received */ 33 - #define CT82C710_TX_IDLE 0x04 /* Device XMIT Idle */ 34 - #define CT82C710_RESET 0x08 /* Device Reset */ 35 - #define CT82C710_INTS_ON 0x10 /* Device Interrupt On */ 36 - #define CT82C710_ERROR_FLAG 0x20 /* Device Error */ 37 - #define CT82C710_CLEAR 0x40 /* Device Clear */ 38 - #define CT82C710_ENABLE 0x80 /* Device Enable */ 39 - 40 - #define CT82C710_IRQ 12 41 - 42 - #define CT82C710_DATA ct82c710_iores.start 43 - #define CT82C710_STATUS (ct82c710_iores.start + 1) 44 - 45 - static struct serio *ct82c710_port; 46 - static struct platform_device *ct82c710_device; 47 - static struct resource ct82c710_iores; 48 - 49 - /* 50 - * Interrupt handler for the 82C710 mouse port. A character 51 - * is waiting in the 82C710. 52 - */ 53 - 54 - static irqreturn_t ct82c710_interrupt(int cpl, void *dev_id) 55 - { 56 - return serio_interrupt(ct82c710_port, inb(CT82C710_DATA), 0); 57 - } 58 - 59 - /* 60 - * Wait for device to send output char and flush any input char. 61 - */ 62 - 63 - static int ct82c170_wait(void) 64 - { 65 - int timeout = 60000; 66 - 67 - while ((inb(CT82C710_STATUS) & (CT82C710_RX_FULL | CT82C710_TX_IDLE | CT82C710_DEV_IDLE)) 68 - != (CT82C710_DEV_IDLE | CT82C710_TX_IDLE) && timeout) { 69 - 70 - if (inb_p(CT82C710_STATUS) & CT82C710_RX_FULL) inb_p(CT82C710_DATA); 71 - 72 - udelay(1); 73 - timeout--; 74 - } 75 - 76 - return !timeout; 77 - } 78 - 79 - static void ct82c710_close(struct serio *serio) 80 - { 81 - if (ct82c170_wait()) 82 - printk(KERN_WARNING "ct82c710.c: Device busy in close()\n"); 83 - 84 - outb_p(inb_p(CT82C710_STATUS) & ~(CT82C710_ENABLE | CT82C710_INTS_ON), CT82C710_STATUS); 85 - 86 - if (ct82c170_wait()) 87 - printk(KERN_WARNING "ct82c710.c: Device busy in close()\n"); 88 - 89 - free_irq(CT82C710_IRQ, NULL); 90 - } 91 - 92 - static int ct82c710_open(struct serio *serio) 93 - { 94 - unsigned char status; 95 - int err; 96 - 97 - err = request_irq(CT82C710_IRQ, ct82c710_interrupt, 0, "ct82c710", NULL); 98 - if (err) 99 - return err; 100 - 101 - status = inb_p(CT82C710_STATUS); 102 - 103 - status |= (CT82C710_ENABLE | CT82C710_RESET); 104 - outb_p(status, CT82C710_STATUS); 105 - 106 - status &= ~(CT82C710_RESET); 107 - outb_p(status, CT82C710_STATUS); 108 - 109 - status |= CT82C710_INTS_ON; 110 - outb_p(status, CT82C710_STATUS); /* Enable interrupts */ 111 - 112 - while (ct82c170_wait()) { 113 - printk(KERN_ERR "ct82c710: Device busy in open()\n"); 114 - status &= ~(CT82C710_ENABLE | CT82C710_INTS_ON); 115 - outb_p(status, CT82C710_STATUS); 116 - free_irq(CT82C710_IRQ, NULL); 117 - return -EBUSY; 118 - } 119 - 120 - return 0; 121 - } 122 - 123 - /* 124 - * Write to the 82C710 mouse device. 125 - */ 126 - 127 - static int ct82c710_write(struct serio *port, unsigned char c) 128 - { 129 - if (ct82c170_wait()) return -1; 130 - outb_p(c, CT82C710_DATA); 131 - return 0; 132 - } 133 - 134 - /* 135 - * See if we can find a 82C710 device. Read mouse address. 136 - */ 137 - 138 - static int __init ct82c710_detect(void) 139 - { 140 - outb_p(0x55, 0x2fa); /* Any value except 9, ff or 36 */ 141 - outb_p(0xaa, 0x3fa); /* Inverse of 55 */ 142 - outb_p(0x36, 0x3fa); /* Address the chip */ 143 - outb_p(0xe4, 0x3fa); /* 390/4; 390 = config address */ 144 - outb_p(0x1b, 0x2fa); /* Inverse of e4 */ 145 - outb_p(0x0f, 0x390); /* Write index */ 146 - if (inb_p(0x391) != 0xe4) /* Config address found? */ 147 - return -ENODEV; /* No: no 82C710 here */ 148 - 149 - outb_p(0x0d, 0x390); /* Write index */ 150 - ct82c710_iores.start = inb_p(0x391) << 2; /* Get mouse I/O address */ 151 - ct82c710_iores.end = ct82c710_iores.start + 1; 152 - ct82c710_iores.flags = IORESOURCE_IO; 153 - outb_p(0x0f, 0x390); 154 - outb_p(0x0f, 0x391); /* Close config mode */ 155 - 156 - return 0; 157 - } 158 - 159 - static int ct82c710_probe(struct platform_device *dev) 160 - { 161 - ct82c710_port = kzalloc_obj(*ct82c710_port); 162 - if (!ct82c710_port) 163 - return -ENOMEM; 164 - 165 - ct82c710_port->id.type = SERIO_8042; 166 - ct82c710_port->dev.parent = &dev->dev; 167 - ct82c710_port->open = ct82c710_open; 168 - ct82c710_port->close = ct82c710_close; 169 - ct82c710_port->write = ct82c710_write; 170 - strscpy(ct82c710_port->name, "C&T 82c710 mouse port", 171 - sizeof(ct82c710_port->name)); 172 - snprintf(ct82c710_port->phys, sizeof(ct82c710_port->phys), 173 - "isa%16llx/serio0", (unsigned long long)CT82C710_DATA); 174 - 175 - serio_register_port(ct82c710_port); 176 - 177 - printk(KERN_INFO "serio: C&T 82c710 mouse port at %#llx irq %d\n", 178 - (unsigned long long)CT82C710_DATA, CT82C710_IRQ); 179 - 180 - return 0; 181 - } 182 - 183 - static void ct82c710_remove(struct platform_device *dev) 184 - { 185 - serio_unregister_port(ct82c710_port); 186 - } 187 - 188 - static struct platform_driver ct82c710_driver = { 189 - .driver = { 190 - .name = "ct82c710", 191 - }, 192 - .probe = ct82c710_probe, 193 - .remove = ct82c710_remove, 194 - }; 195 - 196 - 197 - static int __init ct82c710_init(void) 198 - { 199 - int error; 200 - 201 - error = ct82c710_detect(); 202 - if (error) 203 - return error; 204 - 205 - error = platform_driver_register(&ct82c710_driver); 206 - if (error) 207 - return error; 208 - 209 - ct82c710_device = platform_device_alloc("ct82c710", -1); 210 - if (!ct82c710_device) { 211 - error = -ENOMEM; 212 - goto err_unregister_driver; 213 - } 214 - 215 - error = platform_device_add_resources(ct82c710_device, &ct82c710_iores, 1); 216 - if (error) 217 - goto err_free_device; 218 - 219 - error = platform_device_add(ct82c710_device); 220 - if (error) 221 - goto err_free_device; 222 - 223 - return 0; 224 - 225 - err_free_device: 226 - platform_device_put(ct82c710_device); 227 - err_unregister_driver: 228 - platform_driver_unregister(&ct82c710_driver); 229 - return error; 230 - } 231 - 232 - static void __exit ct82c710_exit(void) 233 - { 234 - platform_device_unregister(ct82c710_device); 235 - platform_driver_unregister(&ct82c710_driver); 236 - } 237 - 238 - module_init(ct82c710_init); 239 - module_exit(ct82c710_exit);