diff options
Diffstat (limited to 'drivers/input/joystick/gamecon.c')
| -rw-r--r-- | drivers/input/joystick/gamecon.c | 1054 |
1 files changed, 1054 insertions, 0 deletions
diff --git a/drivers/input/joystick/gamecon.c b/drivers/input/joystick/gamecon.c new file mode 100644 index 000000000..d37645e49 --- /dev/null +++ b/drivers/input/joystick/gamecon.c @@ -0,0 +1,1054 @@ +// 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); |