Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * NES, SNES, N64, MultiSystem, PSX gamepad driver for Linux
 *
 *  Copyright (c) 1999-2004	Vojtech Pavlik <vojtech@suse.cz>
 *  Copyright (c) 2004		Peter Nelson <rufus-kernel@hackish.org>
 *
 *  Based on the work of:
 *	Andree Borrmann		John Dahlstrom
 *	David Kuder		Nathan Hand
 *	Raphael Assenat
 */
 
/*
 */
 
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/parport.h>
#include <linux/input.h>
#include <linux/mutex.h>
#include <linux/slab.h>
 
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("NES, SNES, N64, MultiSystem, PSX gamepad driver");
MODULE_LICENSE("GPL");
 
#define GC_MAX_PORTS		3
#define GC_MAX_DEVICES		5
 
struct gc_config {
<------>int args[GC_MAX_DEVICES + 1];
<------>unsigned int nargs;
};
 
static struct gc_config gc_cfg[GC_MAX_PORTS];
 
module_param_array_named(map, gc_cfg[0].args, int, &gc_cfg[0].nargs, 0);
MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<pad1>,<pad2>,..<pad5>)");
module_param_array_named(map2, gc_cfg[1].args, int, &gc_cfg[1].nargs, 0);
MODULE_PARM_DESC(map2, "Describes second set of devices");
module_param_array_named(map3, gc_cfg[2].args, int, &gc_cfg[2].nargs, 0);
MODULE_PARM_DESC(map3, "Describes third set of devices");
 
/* see also gs_psx_delay parameter in PSX support section */
 
enum gc_type {
<------>GC_NONE = 0,
<------>GC_SNES,
<------>GC_NES,
<------>GC_NES4,
<------>GC_MULTI,
<------>GC_MULTI2,
<------>GC_N64,
<------>GC_PSX,
<------>GC_DDR,
<------>GC_SNESMOUSE,
<------>GC_MAX
};
 
#define GC_REFRESH_TIME	HZ/100
 
struct gc_pad {
<------>struct input_dev *dev;
<------>enum gc_type type;
<------>char phys[32];
};
 
struct gc {
<------>struct pardevice *pd;
<------>struct gc_pad pads[GC_MAX_DEVICES];
<------>struct timer_list timer;
<------>int pad_count[GC_MAX];
<------>int used;
<------>int parportno;
<------>struct mutex mutex;
};
 
struct gc_subdev {
<------>unsigned int idx;
};
 
static struct gc *gc_base[3];
 
static const int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };
 
static const char *gc_names[] = {
<------>NULL, "SNES pad", "NES pad", "NES FourPort", "Multisystem joystick",
<------>"Multisystem 2-button joystick", "N64 controller", "PSX controller",
<------>"PSX DDR controller", "SNES mouse"
};
 
/*
 * N64 support.
 */
 
static const unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
static const short gc_n64_btn[] = {
<------>BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z,
<------>BTN_TL, BTN_TR, BTN_TRIGGER, BTN_START
};
 
#define GC_N64_LENGTH		32		/* N64 bit length, not including stop bit */
#define GC_N64_STOP_LENGTH	5		/* Length of encoded stop bit */
#define GC_N64_CMD_00		0x11111111UL
#define GC_N64_CMD_01		0xd1111111UL
#define GC_N64_CMD_03		0xdd111111UL
#define GC_N64_CMD_1b		0xdd1dd111UL
#define GC_N64_CMD_c0		0x111111ddUL
#define GC_N64_CMD_80		0x1111111dUL
#define GC_N64_STOP_BIT		0x1d		/* Encoded stop bit */
#define GC_N64_REQUEST_DATA	GC_N64_CMD_01	/* the request data command */
#define GC_N64_DELAY		133		/* delay between transmit request, and response ready (us) */
#define GC_N64_DWS		3		/* delay between write segments (required for sound playback because of ISA DMA) */
<------><------><------><------><------><------>/* GC_N64_DWS > 24 is known to fail */
#define GC_N64_POWER_W		0xe2		/* power during write (transmit request) */
#define GC_N64_POWER_R		0xfd		/* power during read */
#define GC_N64_OUT		0x1d		/* output bits to the 4 pads */
<------><------><------><------><------><------>/* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
<------><------><------><------><------><------>/* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
<------><------><------><------><------><------>/* than 123 us */
#define GC_N64_CLOCK		0x02		/* clock bits for read */
 
/*
 * Used for rumble code.
 */
 
/* Send encoded command */
static void gc_n64_send_command(struct gc *gc, unsigned long cmd,
<------><------><------><------>unsigned char target)
{
<------>struct parport *port = gc->pd->port;
<------>int i;
 
<------>for (i = 0; i < GC_N64_LENGTH; i++) {
<------><------>unsigned char data = (cmd >> i) & 1 ? target : 0;
<------><------>parport_write_data(port, GC_N64_POWER_W | data);
<------><------>udelay(GC_N64_DWS);
<------>}
}
 
/* Send stop bit */
static void gc_n64_send_stop_bit(struct gc *gc, unsigned char target)
{
<------>struct parport *port = gc->pd->port;
<------>int i;
 
<------>for (i = 0; i < GC_N64_STOP_LENGTH; i++) {
<------><------>unsigned char data = (GC_N64_STOP_BIT >> i) & 1 ? target : 0;
<------><------>parport_write_data(port, GC_N64_POWER_W | data);
<------><------>udelay(GC_N64_DWS);
<------>}
}
 
/*
 * gc_n64_read_packet() reads an N64 packet.
 * Each pad uses one bit per byte. So all pads connected to this port
 * are read in parallel.
 */
 
static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
{
<------>int i;
<------>unsigned long flags;
 
/*
 * Request the pad to transmit data
 */
 
<------>local_irq_save(flags);
<------>gc_n64_send_command(gc, GC_N64_REQUEST_DATA, GC_N64_OUT);
<------>gc_n64_send_stop_bit(gc, GC_N64_OUT);
<------>local_irq_restore(flags);
 
/*
 * Wait for the pad response to be loaded into the 33-bit register
 * of the adapter.
 */
 
<------>udelay(GC_N64_DELAY);
 
/*
 * Grab data (ignoring the last bit, which is a stop bit)
 */
 
<------>for (i = 0; i < GC_N64_LENGTH; i++) {
<------><------>parport_write_data(gc->pd->port, GC_N64_POWER_R);
<------><------>udelay(2);
<------><------>data[i] = parport_read_status(gc->pd->port);
<------><------>parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
<------> }
 
/*
 * We must wait 200 ms here for the controller to reinitialize before
 * the next read request. No worries as long as gc_read is polled less
 * frequently than this.
 */
 
}
 
static void gc_n64_process_packet(struct gc *gc)
{
<------>unsigned char data[GC_N64_LENGTH];
<------>struct input_dev *dev;
<------>int i, j, s;
<------>signed char x, y;
 
<------>gc_n64_read_packet(gc, data);
 
<------>for (i = 0; i < GC_MAX_DEVICES; i++) {
 
<------><------>if (gc->pads[i].type != GC_N64)
<------><------><------>continue;
 
<------><------>dev = gc->pads[i].dev;
<------><------>s = gc_status_bit[i];
 
<------><------>if (s & ~(data[8] | data[9])) {
 
<------><------><------>x = y = 0;
 
<------><------><------>for (j = 0; j < 8; j++) {
<------><------><------><------>if (data[23 - j] & s)
<------><------><------><------><------>x |= 1 << j;
<------><------><------><------>if (data[31 - j] & s)
<------><------><------><------><------>y |= 1 << j;
<------><------><------>}
 
<------><------><------>input_report_abs(dev, ABS_X,  x);
<------><------><------>input_report_abs(dev, ABS_Y, -y);
 
<------><------><------>input_report_abs(dev, ABS_HAT0X,
<------><------><------><------><------> !(s & data[6]) - !(s & data[7]));
<------><------><------>input_report_abs(dev, ABS_HAT0Y,
<------><------><------><------><------> !(s & data[4]) - !(s & data[5]));
 
<------><------><------>for (j = 0; j < 10; j++)
<------><------><------><------>input_report_key(dev, gc_n64_btn[j],
<------><------><------><------><------><------> s & data[gc_n64_bytes[j]]);
 
<------><------><------>input_sync(dev);
<------><------>}
<------>}
}
 
static int gc_n64_play_effect(struct input_dev *dev, void *data,
<------><------><------>      struct ff_effect *effect)
{
<------>int i;
<------>unsigned long flags;
<------>struct gc *gc = input_get_drvdata(dev);
<------>struct gc_subdev *sdev = data;
<------>unsigned char target = 1 << sdev->idx; /* select desired pin */
 
<------>if (effect->type == FF_RUMBLE) {
<------><------>struct ff_rumble_effect *rumble = &effect->u.rumble;
<------><------>unsigned int cmd =
<------><------><------>rumble->strong_magnitude || rumble->weak_magnitude ?
<------><------><------>GC_N64_CMD_01 : GC_N64_CMD_00;
 
<------><------>local_irq_save(flags);
 
<------><------>/* Init Rumble - 0x03, 0x80, 0x01, (34)0x80 */
<------><------>gc_n64_send_command(gc, GC_N64_CMD_03, target);
<------><------>gc_n64_send_command(gc, GC_N64_CMD_80, target);
<------><------>gc_n64_send_command(gc, GC_N64_CMD_01, target);
<------><------>for (i = 0; i < 32; i++)
<------><------><------>gc_n64_send_command(gc, GC_N64_CMD_80, target);
<------><------>gc_n64_send_stop_bit(gc, target);
 
<------><------>udelay(GC_N64_DELAY);
 
<------><------>/* Now start or stop it - 0x03, 0xc0, 0zx1b, (32)0x01/0x00 */
<------><------>gc_n64_send_command(gc, GC_N64_CMD_03, target);
<------><------>gc_n64_send_command(gc, GC_N64_CMD_c0, target);
<------><------>gc_n64_send_command(gc, GC_N64_CMD_1b, target);
<------><------>for (i = 0; i < 32; i++)
<------><------><------>gc_n64_send_command(gc, cmd, target);
<------><------>gc_n64_send_stop_bit(gc, target);
 
<------><------>local_irq_restore(flags);
 
<------>}
 
<------>return 0;
}
 
static int gc_n64_init_ff(struct input_dev *dev, int i)
{
<------>struct gc_subdev *sdev;
<------>int err;
 
<------>sdev = kmalloc(sizeof(*sdev), GFP_KERNEL);
<------>if (!sdev)
<------><------>return -ENOMEM;
 
<------>sdev->idx = i;
 
<------>input_set_capability(dev, EV_FF, FF_RUMBLE);
 
<------>err = input_ff_create_memless(dev, sdev, gc_n64_play_effect);
<------>if (err) {
<------><------>kfree(sdev);
<------><------>return err;
<------>}
 
<------>return 0;
}
 
/*
 * NES/SNES support.
 */
 
#define GC_NES_DELAY		6	/* Delay between bits - 6us */
#define GC_NES_LENGTH		8	/* The NES pads use 8 bits of data */
#define GC_SNES_LENGTH		12	/* The SNES true length is 16, but the
<------><------><------><------><------>   last 4 bits are unused */
#define GC_SNESMOUSE_LENGTH	32	/* The SNES mouse uses 32 bits, the first
<------><------><------><------><------>   16 bits are equivalent to a gamepad */
 
#define GC_NES_POWER	0xfc
#define GC_NES_CLOCK	0x01
#define GC_NES_LATCH	0x02
 
static const unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
static const unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
static const short gc_snes_btn[] = {
<------>BTN_A, BTN_B, BTN_SELECT, BTN_START, BTN_X, BTN_Y, BTN_TL, BTN_TR
};
 
/*
 * gc_nes_read_packet() reads a NES/SNES packet.
 * Each pad uses one bit per byte. So all pads connected to
 * this port are read in parallel.
 */
 
static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
{
<------>int i;
 
<------>parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
<------>udelay(GC_NES_DELAY * 2);
<------>parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
 
<------>for (i = 0; i < length; i++) {
<------><------>udelay(GC_NES_DELAY);
<------><------>parport_write_data(gc->pd->port, GC_NES_POWER);
<------><------>data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
<------><------>udelay(GC_NES_DELAY);
<------><------>parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
<------>}
}
 
static void gc_nes_process_packet(struct gc *gc)
{
<------>unsigned char data[GC_SNESMOUSE_LENGTH];
<------>struct gc_pad *pad;
<------>struct input_dev *dev;
<------>int i, j, s, len;
<------>char x_rel, y_rel;
 
<------>len = gc->pad_count[GC_SNESMOUSE] ? GC_SNESMOUSE_LENGTH :
<------><------><------>(gc->pad_count[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH);
 
<------>gc_nes_read_packet(gc, len, data);
 
<------>for (i = 0; i < GC_MAX_DEVICES; i++) {
 
<------><------>pad = &gc->pads[i];
<------><------>dev = pad->dev;
<------><------>s = gc_status_bit[i];
 
<------><------>switch (pad->type) {
 
<------><------>case GC_NES:
 
<------><------><------>input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
<------><------><------>input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
 
<------><------><------>for (j = 0; j < 4; j++)
<------><------><------><------>input_report_key(dev, gc_snes_btn[j],
<------><------><------><------><------><------> s & data[gc_nes_bytes[j]]);
<------><------><------>input_sync(dev);
<------><------><------>break;
 
<------><------>case GC_SNES:
 
<------><------><------>input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
<------><------><------>input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
 
<------><------><------>for (j = 0; j < 8; j++)
<------><------><------><------>input_report_key(dev, gc_snes_btn[j],
<------><------><------><------><------><------> s & data[gc_snes_bytes[j]]);
<------><------><------>input_sync(dev);
<------><------><------>break;
 
<------><------>case GC_SNESMOUSE:
<------><------><------>/*
<------><------><------> * The 4 unused bits from SNES controllers appear
<------><------><------> * to be ID bits so use them to make sure we are
<------><------><------> * dealing with a mouse.
<------><------><------> * gamepad is connected. This is important since
<------><------><------> * my SNES gamepad sends 1's for bits 16-31, which
<------><------><------> * cause the mouse pointer to quickly move to the
<------><------><------> * upper left corner of the screen.
<------><------><------> */
<------><------><------>if (!(s & data[12]) && !(s & data[13]) &&
<------><------><------>    !(s & data[14]) && (s & data[15])) {
<------><------><------><------>input_report_key(dev, BTN_LEFT, s & data[9]);
<------><------><------><------>input_report_key(dev, BTN_RIGHT, s & data[8]);
 
<------><------><------><------>x_rel = y_rel = 0;
<------><------><------><------>for (j = 0; j < 7; j++) {
<------><------><------><------><------>x_rel <<= 1;
<------><------><------><------><------>if (data[25 + j] & s)
<------><------><------><------><------><------>x_rel |= 1;
 
<------><------><------><------><------>y_rel <<= 1;
<------><------><------><------><------>if (data[17 + j] & s)
<------><------><------><------><------><------>y_rel |= 1;
<------><------><------><------>}
 
<------><------><------><------>if (x_rel) {
<------><------><------><------><------>if (data[24] & s)
<------><------><------><------><------><------>x_rel = -x_rel;
<------><------><------><------><------>input_report_rel(dev, REL_X, x_rel);
<------><------><------><------>}
 
<------><------><------><------>if (y_rel) {
<------><------><------><------><------>if (data[16] & s)
<------><------><------><------><------><------>y_rel = -y_rel;
<------><------><------><------><------>input_report_rel(dev, REL_Y, y_rel);
<------><------><------><------>}
 
<------><------><------><------>input_sync(dev);
<------><------><------>}
<------><------><------>break;
 
<------><------>default:
<------><------><------>break;
<------><------>}
<------>}
}
 
/*
 * Multisystem joystick support
 */
 
#define GC_MULTI_LENGTH		5	/* Multi system joystick packet length is 5 */
#define GC_MULTI2_LENGTH	6	/* One more bit for one more button */
 
/*
 * gc_multi_read_packet() reads a Multisystem joystick packet.
 */
 
static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
{
<------>int i;
 
<------>for (i = 0; i < length; i++) {
<------><------>parport_write_data(gc->pd->port, ~(1 << i));
<------><------>data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
<------>}
}
 
static void gc_multi_process_packet(struct gc *gc)
{
<------>unsigned char data[GC_MULTI2_LENGTH];
<------>int data_len = gc->pad_count[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH;
<------>struct gc_pad *pad;
<------>struct input_dev *dev;
<------>int i, s;
 
<------>gc_multi_read_packet(gc, data_len, data);
 
<------>for (i = 0; i < GC_MAX_DEVICES; i++) {
<------><------>pad = &gc->pads[i];
<------><------>dev = pad->dev;
<------><------>s = gc_status_bit[i];
 
<------><------>switch (pad->type) {
<------><------>case GC_MULTI2:
<------><------><------>input_report_key(dev, BTN_THUMB, s & data[5]);
<------><------><------>fallthrough;
 
<------><------>case GC_MULTI:
<------><------><------>input_report_abs(dev, ABS_X,
<------><------><------><------><------> !(s & data[2]) - !(s & data[3]));
<------><------><------>input_report_abs(dev, ABS_Y,
<------><------><------><------><------> !(s & data[0]) - !(s & data[1]));
<------><------><------>input_report_key(dev, BTN_TRIGGER, s & data[4]);
<------><------><------>input_sync(dev);
<------><------><------>break;
 
<------><------>default:
<------><------><------>break;
<------><------>}
<------>}
}
 
/*
 * PSX support
 *
 * See documentation at:
 *	http://www.geocities.co.jp/Playtown/2004/psx/ps_eng.txt	
 *	http://www.gamesx.com/controldata/psxcont/psxcont.htm
 *
 */
 
#define GC_PSX_DELAY	25		/* 25 usec */
#define GC_PSX_LENGTH	8		/* talk to the controller in bits */
#define GC_PSX_BYTES	6		/* the maximum number of bytes to read off the controller */
 
#define GC_PSX_MOUSE	1		/* Mouse */
#define GC_PSX_NEGCON	2		/* NegCon */
#define GC_PSX_NORMAL	4		/* Digital / Analog or Rumble in Digital mode  */
#define GC_PSX_ANALOG	5		/* Analog in Analog mode / Rumble in Green mode */
#define GC_PSX_RUMBLE	7		/* Rumble in Red mode */
 
#define GC_PSX_CLOCK	0x04		/* Pin 4 */
#define GC_PSX_COMMAND	0x01		/* Pin 2 */
#define GC_PSX_POWER	0xf8		/* Pins 5-9 */
#define GC_PSX_SELECT	0x02		/* Pin 3 */
 
#define GC_PSX_ID(x)	((x) >> 4)	/* High nibble is device type */
#define GC_PSX_LEN(x)	(((x) & 0xf) << 1)	/* Low nibble is length in bytes/2 */
 
static int gc_psx_delay = GC_PSX_DELAY;
module_param_named(psx_delay, gc_psx_delay, uint, 0);
MODULE_PARM_DESC(psx_delay, "Delay when accessing Sony PSX controller (usecs)");
 
static const short gc_psx_abs[] = {
<------>ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y
};
static const short gc_psx_btn[] = {
<------>BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
<------>BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR
};
static const short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };
 
/*
 * gc_psx_command() writes 8bit command and reads 8bit data from
 * the psx pad.
 */
 
static void gc_psx_command(struct gc *gc, int b, unsigned char *data)
{
<------>struct parport *port = gc->pd->port;
<------>int i, j, cmd, read;
 
<------>memset(data, 0, GC_MAX_DEVICES);
 
<------>for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
<------><------>cmd = (b & 1) ? GC_PSX_COMMAND : 0;
<------><------>parport_write_data(port, cmd | GC_PSX_POWER);
<------><------>udelay(gc_psx_delay);
 
<------><------>read = parport_read_status(port) ^ 0x80;
 
<------><------>for (j = 0; j < GC_MAX_DEVICES; j++) {
<------><------><------>struct gc_pad *pad = &gc->pads[j];
 
<------><------><------>if (pad->type == GC_PSX || pad->type == GC_DDR)
<------><------><------><------>data[j] |= (read & gc_status_bit[j]) ? (1 << i) : 0;
<------><------>}
 
<------><------>parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
<------><------>udelay(gc_psx_delay);
<------>}
}
 
/*
 * gc_psx_read_packet() reads a whole psx packet and returns
 * device identifier code.
 */
 
static void gc_psx_read_packet(struct gc *gc,
<------><------><------>       unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES],
<------><------><------>       unsigned char id[GC_MAX_DEVICES])
{
<------>int i, j, max_len = 0;
<------>unsigned long flags;
<------>unsigned char data2[GC_MAX_DEVICES];
 
<------>/* Select pad */
<------>parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
<------>udelay(gc_psx_delay);
<------>/* Deselect, begin command */
<------>parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);
<------>udelay(gc_psx_delay);
 
<------>local_irq_save(flags);
 
<------>gc_psx_command(gc, 0x01, data2);	/* Access pad */
<------>gc_psx_command(gc, 0x42, id);		/* Get device ids */
<------>gc_psx_command(gc, 0, data2);		/* Dump status */
 
<------>/* Find the longest pad */
<------>for (i = 0; i < GC_MAX_DEVICES; i++) {
<------><------>struct gc_pad *pad = &gc->pads[i];
 
<------><------>if ((pad->type == GC_PSX || pad->type == GC_DDR) &&
<------><------>    GC_PSX_LEN(id[i]) > max_len &&
<------><------>    GC_PSX_LEN(id[i]) <= GC_PSX_BYTES) {
<------><------><------>max_len = GC_PSX_LEN(id[i]);
<------><------>}
<------>}
 
<------>/* Read in all the data */
<------>for (i = 0; i < max_len; i++) {
<------><------>gc_psx_command(gc, 0, data2);
<------><------>for (j = 0; j < GC_MAX_DEVICES; j++)
<------><------><------>data[j][i] = data2[j];
<------>}
 
<------>local_irq_restore(flags);
 
<------>parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
 
<------>/* Set id's to the real value */
<------>for (i = 0; i < GC_MAX_DEVICES; i++)
<------><------>id[i] = GC_PSX_ID(id[i]);
}
 
static void gc_psx_report_one(struct gc_pad *pad, unsigned char psx_type,
<------><------><------>      unsigned char *data)
{
<------>struct input_dev *dev = pad->dev;
<------>int i;
 
<------>switch (psx_type) {
 
<------>case GC_PSX_RUMBLE:
 
<------><------>input_report_key(dev, BTN_THUMBL, ~data[0] & 0x04);
<------><------>input_report_key(dev, BTN_THUMBR, ~data[0] & 0x02);
<------><------>fallthrough;
 
<------>case GC_PSX_NEGCON:
<------>case GC_PSX_ANALOG:
 
<------><------>if (pad->type == GC_DDR) {
<------><------><------>for (i = 0; i < 4; i++)
<------><------><------><------>input_report_key(dev, gc_psx_ddr_btn[i],
<------><------><------><------><------><------> ~data[0] & (0x10 << i));
<------><------>} else {
<------><------><------>for (i = 0; i < 4; i++)
<------><------><------><------>input_report_abs(dev, gc_psx_abs[i + 2],
<------><------><------><------><------><------> data[i + 2]);
 
<------><------><------>input_report_abs(dev, ABS_X,
<------><------><------><------>!!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
<------><------><------>input_report_abs(dev, ABS_Y,
<------><------><------><------>!!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
<------><------>}
 
<------><------>for (i = 0; i < 8; i++)
<------><------><------>input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
 
<------><------>input_report_key(dev, BTN_START,  ~data[0] & 0x08);
<------><------>input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
 
<------><------>input_sync(dev);
 
<------><------>break;
 
<------>case GC_PSX_NORMAL:
 
<------><------>if (pad->type == GC_DDR) {
<------><------><------>for (i = 0; i < 4; i++)
<------><------><------><------>input_report_key(dev, gc_psx_ddr_btn[i],
<------><------><------><------><------><------> ~data[0] & (0x10 << i));
<------><------>} else {
<------><------><------>input_report_abs(dev, ABS_X,
<------><------><------><------>!!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
<------><------><------>input_report_abs(dev, ABS_Y,
<------><------><------><------>!!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
 
<------><------><------>/*
<------><------><------> * For some reason if the extra axes are left unset
<------><------><------> * they drift.
<------><------><------> * for (i = 0; i < 4; i++)
<------><------><------><------>input_report_abs(dev, gc_psx_abs[i + 2], 128);
<------><------><------> * This needs to be debugged properly,
<------><------><------> * maybe fuzz processing needs to be done
<------><------><------> * in input_sync()
<------><------><------> *				 --vojtech
<------><------><------> */
<------><------>}
 
<------><------>for (i = 0; i < 8; i++)
<------><------><------>input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
 
<------><------>input_report_key(dev, BTN_START,  ~data[0] & 0x08);
<------><------>input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
 
<------><------>input_sync(dev);
 
<------><------>break;
 
<------>default: /* not a pad, ignore */
<------><------>break;
<------>}
}
 
static void gc_psx_process_packet(struct gc *gc)
{
<------>unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES];
<------>unsigned char id[GC_MAX_DEVICES];
<------>struct gc_pad *pad;
<------>int i;
 
<------>gc_psx_read_packet(gc, data, id);
 
<------>for (i = 0; i < GC_MAX_DEVICES; i++) {
<------><------>pad = &gc->pads[i];
<------><------>if (pad->type == GC_PSX || pad->type == GC_DDR)
<------><------><------>gc_psx_report_one(pad, id[i], data[i]);
<------>}
}
 
/*
 * gc_timer() initiates reads of console pads data.
 */
 
static void gc_timer(struct timer_list *t)
{
<------>struct gc *gc = from_timer(gc, t, timer);
 
/*
 * N64 pads - must be read first, any read confuses them for 200 us
 */
 
<------>if (gc->pad_count[GC_N64])
<------><------>gc_n64_process_packet(gc);
 
/*
 * NES and SNES pads or mouse
 */
 
<------>if (gc->pad_count[GC_NES] ||
<------>    gc->pad_count[GC_SNES] ||
<------>    gc->pad_count[GC_SNESMOUSE]) {
<------><------>gc_nes_process_packet(gc);
<------>}
 
/*
 * Multi and Multi2 joysticks
 */
 
<------>if (gc->pad_count[GC_MULTI] || gc->pad_count[GC_MULTI2])
<------><------>gc_multi_process_packet(gc);
 
/*
 * PSX controllers
 */
 
<------>if (gc->pad_count[GC_PSX] || gc->pad_count[GC_DDR])
<------><------>gc_psx_process_packet(gc);
 
<------>mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
}
 
static int gc_open(struct input_dev *dev)
{
<------>struct gc *gc = input_get_drvdata(dev);
<------>int err;
 
<------>err = mutex_lock_interruptible(&gc->mutex);
<------>if (err)
<------><------>return err;
 
<------>if (!gc->used++) {
<------><------>parport_claim(gc->pd);
<------><------>parport_write_control(gc->pd->port, 0x04);
<------><------>mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
<------>}
 
<------>mutex_unlock(&gc->mutex);
<------>return 0;
}
 
static void gc_close(struct input_dev *dev)
{
<------>struct gc *gc = input_get_drvdata(dev);
 
<------>mutex_lock(&gc->mutex);
<------>if (!--gc->used) {
<------><------>del_timer_sync(&gc->timer);
<------><------>parport_write_control(gc->pd->port, 0x00);
<------><------>parport_release(gc->pd);
<------>}
<------>mutex_unlock(&gc->mutex);
}
 
static int gc_setup_pad(struct gc *gc, int idx, int pad_type)
{
<------>struct gc_pad *pad = &gc->pads[idx];
<------>struct input_dev *input_dev;
<------>int i;
<------>int err;
 
<------>if (pad_type < 1 || pad_type >= GC_MAX) {
<------><------>pr_err("Pad type %d unknown\n", pad_type);
<------><------>return -EINVAL;
<------>}
 
<------>pad->dev = input_dev = input_allocate_device();
<------>if (!input_dev) {
<------><------>pr_err("Not enough memory for input device\n");
<------><------>return -ENOMEM;
<------>}
 
<------>pad->type = pad_type;
 
<------>snprintf(pad->phys, sizeof(pad->phys),
<------><------> "%s/input%d", gc->pd->port->name, idx);
 
<------>input_dev->name = gc_names[pad_type];
<------>input_dev->phys = pad->phys;
<------>input_dev->id.bustype = BUS_PARPORT;
<------>input_dev->id.vendor = 0x0001;
<------>input_dev->id.product = pad_type;
<------>input_dev->id.version = 0x0100;
 
<------>input_set_drvdata(input_dev, gc);
 
<------>input_dev->open = gc_open;
<------>input_dev->close = gc_close;
 
<------>if (pad_type != GC_SNESMOUSE) {
<------><------>input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 
<------><------>for (i = 0; i < 2; i++)
<------><------><------>input_set_abs_params(input_dev, ABS_X + i, -1, 1, 0, 0);
<------>} else
<------><------>input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 
<------>gc->pad_count[pad_type]++;
 
<------>switch (pad_type) {
 
<------>case GC_N64:
<------><------>for (i = 0; i < 10; i++)
<------><------><------>input_set_capability(input_dev, EV_KEY, gc_n64_btn[i]);
 
<------><------>for (i = 0; i < 2; i++) {
<------><------><------>input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
<------><------><------>input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
<------><------>}
 
<------><------>err = gc_n64_init_ff(input_dev, idx);
<------><------>if (err) {
<------><------><------>pr_warn("Failed to initiate rumble for N64 device %d\n",
<------><------><------><------>idx);
<------><------><------>goto err_free_dev;
<------><------>}
 
<------><------>break;
 
<------>case GC_SNESMOUSE:
<------><------>input_set_capability(input_dev, EV_KEY, BTN_LEFT);
<------><------>input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
<------><------>input_set_capability(input_dev, EV_REL, REL_X);
<------><------>input_set_capability(input_dev, EV_REL, REL_Y);
<------><------>break;
 
<------>case GC_SNES:
<------><------>for (i = 4; i < 8; i++)
<------><------><------>input_set_capability(input_dev, EV_KEY, gc_snes_btn[i]);
<------><------>fallthrough;
 
<------>case GC_NES:
<------><------>for (i = 0; i < 4; i++)
<------><------><------>input_set_capability(input_dev, EV_KEY, gc_snes_btn[i]);
<------><------>break;
 
<------>case GC_MULTI2:
<------><------>input_set_capability(input_dev, EV_KEY, BTN_THUMB);
<------><------>fallthrough;
 
<------>case GC_MULTI:
<------><------>input_set_capability(input_dev, EV_KEY, BTN_TRIGGER);
<------><------>break;
 
<------>case GC_PSX:
<------><------>for (i = 0; i < 6; i++)
<------><------><------>input_set_abs_params(input_dev,
<------><------><------><------><------>     gc_psx_abs[i], 4, 252, 0, 2);
<------><------>for (i = 0; i < 12; i++)
<------><------><------>input_set_capability(input_dev, EV_KEY, gc_psx_btn[i]);
<------><------>break;
 
<------><------>break;
 
<------>case GC_DDR:
<------><------>for (i = 0; i < 4; i++)
<------><------><------>input_set_capability(input_dev, EV_KEY,
<------><------><------><------><------>     gc_psx_ddr_btn[i]);
<------><------>for (i = 0; i < 12; i++)
<------><------><------>input_set_capability(input_dev, EV_KEY, gc_psx_btn[i]);
 
<------><------>break;
<------>}
 
<------>err = input_register_device(pad->dev);
<------>if (err)
<------><------>goto err_free_dev;
 
<------>return 0;
 
err_free_dev:
<------>input_free_device(pad->dev);
<------>pad->dev = NULL;
<------>return err;
}
 
static void gc_attach(struct parport *pp)
{
<------>struct gc *gc;
<------>struct pardevice *pd;
<------>int i, port_idx;
<------>int count = 0;
<------>int *pads, n_pads;
<------>struct pardev_cb gc_parport_cb;
 
<------>for (port_idx = 0; port_idx < GC_MAX_PORTS; port_idx++) {
<------><------>if (gc_cfg[port_idx].nargs == 0 || gc_cfg[port_idx].args[0] < 0)
<------><------><------>continue;
 
<------><------>if (gc_cfg[port_idx].args[0] == pp->number)
<------><------><------>break;
<------>}
 
<------>if (port_idx == GC_MAX_PORTS) {
<------><------>pr_debug("Not using parport%d.\n", pp->number);
<------><------>return;
<------>}
<------>pads = gc_cfg[port_idx].args + 1;
<------>n_pads = gc_cfg[port_idx].nargs - 1;
 
<------>memset(&gc_parport_cb, 0, sizeof(gc_parport_cb));
<------>gc_parport_cb.flags = PARPORT_FLAG_EXCL;
 
<------>pd = parport_register_dev_model(pp, "gamecon", &gc_parport_cb,
<------><------><------><------><------>port_idx);
<------>if (!pd) {
<------><------>pr_err("parport busy already - lp.o loaded?\n");
<------><------>return;
<------>}
 
<------>gc = kzalloc(sizeof(struct gc), GFP_KERNEL);
<------>if (!gc) {
<------><------>pr_err("Not enough memory\n");
<------><------>goto err_unreg_pardev;
<------>}
 
<------>mutex_init(&gc->mutex);
<------>gc->pd = pd;
<------>gc->parportno = pp->number;
<------>timer_setup(&gc->timer, gc_timer, 0);
 
<------>for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
<------><------>if (!pads[i])
<------><------><------>continue;
 
<------><------>if (gc_setup_pad(gc, i, pads[i]))
<------><------><------>goto err_unreg_devs;
 
<------><------>count++;
<------>}
 
<------>if (count == 0) {
<------><------>pr_err("No valid devices specified\n");
<------><------>goto err_free_gc;
<------>}
 
<------>gc_base[port_idx] = gc;
<------>return;
 
 err_unreg_devs:
<------>while (--i >= 0)
<------><------>if (gc->pads[i].dev)
<------><------><------>input_unregister_device(gc->pads[i].dev);
 err_free_gc:
<------>kfree(gc);
 err_unreg_pardev:
<------>parport_unregister_device(pd);
}
 
static void gc_detach(struct parport *port)
{
<------>int i;
<------>struct gc *gc;
 
<------>for (i = 0; i < GC_MAX_PORTS; i++) {
<------><------>if (gc_base[i] && gc_base[i]->parportno == port->number)
<------><------><------>break;
<------>}
 
<------>if (i == GC_MAX_PORTS)
<------><------>return;
 
<------>gc = gc_base[i];
<------>gc_base[i] = NULL;
 
<------>for (i = 0; i < GC_MAX_DEVICES; i++)
<------><------>if (gc->pads[i].dev)
<------><------><------>input_unregister_device(gc->pads[i].dev);
<------>parport_unregister_device(gc->pd);
<------>kfree(gc);
}
 
static struct parport_driver gc_parport_driver = {
<------>.name = "gamecon",
<------>.match_port = gc_attach,
<------>.detach = gc_detach,
<------>.devmodel = true,
};
 
static int __init gc_init(void)
{
<------>int i;
<------>int have_dev = 0;
 
<------>for (i = 0; i < GC_MAX_PORTS; i++) {
<------><------>if (gc_cfg[i].nargs == 0 || gc_cfg[i].args[0] < 0)
<------><------><------>continue;
 
<------><------>if (gc_cfg[i].nargs < 2) {
<------><------><------>pr_err("at least one device must be specified\n");
<------><------><------>return -EINVAL;
<------><------>}
 
<------><------>have_dev = 1;
<------>}
 
<------>if (!have_dev)
<------><------>return -ENODEV;
 
<------>return parport_register_driver(&gc_parport_driver);
}
 
static void __exit gc_exit(void)
{
<------>parport_unregister_driver(&gc_parport_driver);
}
 
module_init(gc_init);
module_exit(gc_exit);