2019-05-27 14:55:05 +08:00
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// SPDX-License-Identifier: GPL-2.0-or-later
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2005-04-17 06:20:36 +08:00
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/*
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* Copyright (c) 1999-2001 Vojtech Pavlik
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*
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* Based on the work of:
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2005-05-29 15:28:55 +08:00
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* David Thompson
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* Joseph Krahn
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2005-04-17 06:20:36 +08:00
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*/
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/*
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* SpaceTec SpaceBall 2003/3003/4000 FLX driver for Linux
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*/
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/*
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/input.h>
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#include <linux/serio.h>
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#define DRIVER_DESC "SpaceTec SpaceBall 2003/3003/4000 FLX driver"
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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/*
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* Constants.
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*/
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#define SPACEBALL_MAX_LENGTH 128
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2006-07-19 13:14:44 +08:00
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#define SPACEBALL_MAX_ID 9
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2005-04-17 06:20:36 +08:00
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#define SPACEBALL_1003 1
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#define SPACEBALL_2003B 3
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#define SPACEBALL_2003C 4
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#define SPACEBALL_3003C 7
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#define SPACEBALL_4000FLX 8
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#define SPACEBALL_4000FLX_L 9
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static int spaceball_axes[] = { ABS_X, ABS_Z, ABS_Y, ABS_RX, ABS_RZ, ABS_RY };
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static char *spaceball_names[] = {
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"?", "SpaceTec SpaceBall 1003", "SpaceTec SpaceBall 2003", "SpaceTec SpaceBall 2003B",
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"SpaceTec SpaceBall 2003C", "SpaceTec SpaceBall 3003", "SpaceTec SpaceBall SpaceController",
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"SpaceTec SpaceBall 3003C", "SpaceTec SpaceBall 4000FLX", "SpaceTec SpaceBall 4000FLX Lefty" };
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/*
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* Per-Ball data.
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*/
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struct spaceball {
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2005-09-15 15:01:52 +08:00
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struct input_dev *dev;
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2005-04-17 06:20:36 +08:00
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int idx;
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int escape;
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unsigned char data[SPACEBALL_MAX_LENGTH];
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char phys[32];
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};
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/*
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* spaceball_process_packet() decodes packets the driver receives from the
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* SpaceBall.
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*/
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IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 21:55:46 +08:00
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static void spaceball_process_packet(struct spaceball* spaceball)
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2005-04-17 06:20:36 +08:00
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{
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2005-09-15 15:01:52 +08:00
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struct input_dev *dev = spaceball->dev;
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2005-04-17 06:20:36 +08:00
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unsigned char *data = spaceball->data;
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int i;
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if (spaceball->idx < 2) return;
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switch (spaceball->data[0]) {
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case 'D': /* Ball data */
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if (spaceball->idx != 15) return;
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for (i = 0; i < 6; i++)
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input_report_abs(dev, spaceball_axes[i],
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(__s16)((data[2 * i + 3] << 8) | data[2 * i + 2]));
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break;
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case 'K': /* Button data */
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if (spaceball->idx != 3) return;
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input_report_key(dev, BTN_1, (data[2] & 0x01) || (data[2] & 0x20));
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input_report_key(dev, BTN_2, data[2] & 0x02);
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input_report_key(dev, BTN_3, data[2] & 0x04);
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input_report_key(dev, BTN_4, data[2] & 0x08);
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input_report_key(dev, BTN_5, data[1] & 0x01);
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input_report_key(dev, BTN_6, data[1] & 0x02);
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input_report_key(dev, BTN_7, data[1] & 0x04);
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input_report_key(dev, BTN_8, data[1] & 0x10);
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break;
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case '.': /* Advanced button data */
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if (spaceball->idx != 3) return;
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input_report_key(dev, BTN_1, data[2] & 0x01);
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input_report_key(dev, BTN_2, data[2] & 0x02);
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input_report_key(dev, BTN_3, data[2] & 0x04);
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input_report_key(dev, BTN_4, data[2] & 0x08);
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input_report_key(dev, BTN_5, data[2] & 0x10);
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input_report_key(dev, BTN_6, data[2] & 0x20);
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input_report_key(dev, BTN_7, data[2] & 0x80);
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input_report_key(dev, BTN_8, data[1] & 0x01);
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input_report_key(dev, BTN_9, data[1] & 0x02);
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input_report_key(dev, BTN_A, data[1] & 0x04);
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input_report_key(dev, BTN_B, data[1] & 0x08);
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input_report_key(dev, BTN_C, data[1] & 0x10);
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input_report_key(dev, BTN_MODE, data[1] & 0x20);
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break;
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case 'E': /* Device error */
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spaceball->data[spaceball->idx - 1] = 0;
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printk(KERN_ERR "spaceball: Device error. [%s]\n", spaceball->data + 1);
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break;
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case '?': /* Bad command packet */
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spaceball->data[spaceball->idx - 1] = 0;
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printk(KERN_ERR "spaceball: Bad command. [%s]\n", spaceball->data + 1);
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break;
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}
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input_sync(dev);
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}
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/*
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* Spaceball 4000 FLX packets all start with a one letter packet-type decriptor,
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* and end in 0x0d. It uses '^' as an escape for CR, XOFF and XON characters which
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* can occur in the axis values.
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*/
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static irqreturn_t spaceball_interrupt(struct serio *serio,
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IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 21:55:46 +08:00
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unsigned char data, unsigned int flags)
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2005-04-17 06:20:36 +08:00
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{
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struct spaceball *spaceball = serio_get_drvdata(serio);
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switch (data) {
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case 0xd:
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IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 21:55:46 +08:00
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spaceball_process_packet(spaceball);
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2005-04-17 06:20:36 +08:00
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spaceball->idx = 0;
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spaceball->escape = 0;
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break;
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case '^':
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if (!spaceball->escape) {
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spaceball->escape = 1;
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break;
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}
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spaceball->escape = 0;
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2020-07-08 02:24:55 +08:00
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fallthrough;
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2005-04-17 06:20:36 +08:00
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case 'M':
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case 'Q':
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case 'S':
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if (spaceball->escape) {
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spaceball->escape = 0;
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data &= 0x1f;
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}
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2020-07-08 02:24:55 +08:00
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fallthrough;
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2005-04-17 06:20:36 +08:00
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default:
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if (spaceball->escape)
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spaceball->escape = 0;
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if (spaceball->idx < SPACEBALL_MAX_LENGTH)
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spaceball->data[spaceball->idx++] = data;
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break;
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}
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return IRQ_HANDLED;
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}
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/*
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* spaceball_disconnect() is the opposite of spaceball_connect()
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*/
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static void spaceball_disconnect(struct serio *serio)
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{
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struct spaceball* spaceball = serio_get_drvdata(serio);
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serio_close(serio);
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serio_set_drvdata(serio, NULL);
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2005-09-15 15:01:52 +08:00
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input_unregister_device(spaceball->dev);
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2005-04-17 06:20:36 +08:00
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kfree(spaceball);
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}
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/*
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* spaceball_connect() is the routine that is called when someone adds a
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* new serio device that supports Spaceball protocol and registers it as
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* an input device.
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*/
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static int spaceball_connect(struct serio *serio, struct serio_driver *drv)
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{
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struct spaceball *spaceball;
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2005-09-15 15:01:52 +08:00
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struct input_dev *input_dev;
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int err = -ENOMEM;
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int i, id;
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2005-04-17 06:20:36 +08:00
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if ((id = serio->id.id) > SPACEBALL_MAX_ID)
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return -ENODEV;
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2005-09-15 15:01:52 +08:00
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spaceball = kmalloc(sizeof(struct spaceball), GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!spaceball || !input_dev)
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2006-11-06 11:40:09 +08:00
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goto fail1;
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2005-04-17 06:20:36 +08:00
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2005-09-15 15:01:52 +08:00
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spaceball->dev = input_dev;
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2006-06-26 13:45:48 +08:00
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snprintf(spaceball->phys, sizeof(spaceball->phys), "%s/input0", serio->phys);
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2005-09-15 15:01:52 +08:00
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input_dev->name = spaceball_names[id];
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input_dev->phys = spaceball->phys;
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input_dev->id.bustype = BUS_RS232;
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input_dev->id.vendor = SERIO_SPACEBALL;
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input_dev->id.product = id;
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input_dev->id.version = 0x0100;
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2007-04-12 13:35:26 +08:00
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input_dev->dev.parent = &serio->dev;
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2005-04-17 06:20:36 +08:00
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2007-10-19 14:40:32 +08:00
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
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2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
switch (id) {
|
|
|
|
|
case SPACEBALL_4000FLX:
|
|
|
|
|
case SPACEBALL_4000FLX_L:
|
2007-10-19 14:40:32 +08:00
|
|
|
input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_9);
|
|
|
|
|
input_dev->keybit[BIT_WORD(BTN_A)] |= BIT_MASK(BTN_A) |
|
|
|
|
|
BIT_MASK(BTN_B) | BIT_MASK(BTN_C) |
|
|
|
|
|
BIT_MASK(BTN_MODE);
|
2020-07-08 02:24:55 +08:00
|
|
|
fallthrough;
|
2005-04-17 06:20:36 +08:00
|
|
|
default:
|
2007-10-19 14:40:32 +08:00
|
|
|
input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_2) |
|
|
|
|
|
BIT_MASK(BTN_3) | BIT_MASK(BTN_4) |
|
|
|
|
|
BIT_MASK(BTN_5) | BIT_MASK(BTN_6) |
|
|
|
|
|
BIT_MASK(BTN_7) | BIT_MASK(BTN_8);
|
2020-07-08 02:24:55 +08:00
|
|
|
fallthrough;
|
2005-04-17 06:20:36 +08:00
|
|
|
case SPACEBALL_3003C:
|
2007-10-19 14:40:32 +08:00
|
|
|
input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_1) |
|
|
|
|
|
BIT_MASK(BTN_8);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
2005-09-15 15:01:52 +08:00
|
|
|
for (i = 0; i < 3; i++) {
|
|
|
|
|
input_set_abs_params(input_dev, ABS_X + i, -8000, 8000, 8, 40);
|
|
|
|
|
input_set_abs_params(input_dev, ABS_RX + i, -1600, 1600, 2, 8);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
serio_set_drvdata(serio, spaceball);
|
|
|
|
|
|
|
|
|
|
err = serio_open(serio, drv);
|
2005-09-15 15:01:52 +08:00
|
|
|
if (err)
|
2006-11-06 11:40:09 +08:00
|
|
|
goto fail2;
|
|
|
|
|
|
|
|
|
|
err = input_register_device(spaceball->dev);
|
|
|
|
|
if (err)
|
|
|
|
|
goto fail3;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
return 0;
|
2005-09-15 15:01:52 +08:00
|
|
|
|
2006-11-06 11:40:09 +08:00
|
|
|
fail3: serio_close(serio);
|
|
|
|
|
fail2: serio_set_drvdata(serio, NULL);
|
|
|
|
|
fail1: input_free_device(input_dev);
|
2005-09-15 15:01:52 +08:00
|
|
|
kfree(spaceball);
|
|
|
|
|
return err;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* The serio driver structure.
|
|
|
|
|
*/
|
|
|
|
|
|
2017-08-19 08:08:02 +08:00
|
|
|
static const struct serio_device_id spaceball_serio_ids[] = {
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
|
.type = SERIO_RS232,
|
|
|
|
|
.proto = SERIO_SPACEBALL,
|
|
|
|
|
.id = SERIO_ANY,
|
|
|
|
|
.extra = SERIO_ANY,
|
|
|
|
|
},
|
|
|
|
|
{ 0 }
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
MODULE_DEVICE_TABLE(serio, spaceball_serio_ids);
|
|
|
|
|
|
|
|
|
|
static struct serio_driver spaceball_drv = {
|
|
|
|
|
.driver = {
|
|
|
|
|
.name = "spaceball",
|
|
|
|
|
},
|
|
|
|
|
.description = DRIVER_DESC,
|
|
|
|
|
.id_table = spaceball_serio_ids,
|
|
|
|
|
.interrupt = spaceball_interrupt,
|
|
|
|
|
.connect = spaceball_connect,
|
|
|
|
|
.disconnect = spaceball_disconnect,
|
|
|
|
|
};
|
|
|
|
|
|
2012-04-04 14:50:17 +08:00
|
|
|
module_serio_driver(spaceball_drv);
|
