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Subject[PATCH] db9.c (Re: [PATCH] gamecon (added support for Sega Saturn controller), kernel 2.4.20)
Hello,

This is db9.c patch to support Saturn DPP.
I merged original interface section into DPP section to support
analog controllers. I gave priority to documentation of
joystick-parport.txt.

Set 11 or 12 in 'type' to use DPP (11 for a connector, 12 for two
connectors).

Tested with:
* DPP interface (one connector) and joystick-parport.txt interface.
* Digital controller, saturn keyboard (as joypad), racing controller,
mission stick, multi controller, shuttle mouse, multi terminal 6,
and sankyo ff.

NOT tested with:
* DPP interface (two connectors).
* Virtua Gun, mission stick x2, and other controllers.

Thank you for your reading,
yokota


--- db9.c.orig 2001-09-13 07:34:06.000000000 +0900
+++ db9.c 2003-04-10 23:03:49.000000000 +0900
@@ -55,7 +55,9 @@
#define DB9_MULTI_0802 0x08
#define DB9_MULTI_0802_2 0x09
#define DB9_CD32_PAD 0x0A
-#define DB9_MAX_PAD 0x0B
+#define DB9_SATURN_DPP 0x0B
+#define DB9_SATURN_DPP_2 0x0C
+#define DB9_MAX_PAD 0x0D

#define DB9_UP 0x01
#define DB9_DOWN 0x02
@@ -69,10 +71,7 @@
#define DB9_NORMAL 0x0a
#define DB9_NOSELECT 0x08

-#define DB9_SATURN0 0x00
-#define DB9_SATURN1 0x02
-#define DB9_SATURN2 0x04
-#define DB9_SATURN3 0x06
+#define DB9_MAX_DEVICES 2

#define DB9_GENESIS6_DELAY 14
#define DB9_REFRESH_TIME HZ/100
@@ -82,7 +81,7 @@
static int db9_3[] __initdata = { -1, 0 };

struct db9 {
- struct input_dev dev[2];
+ struct input_dev dev[DB9_MAX_DEVICES];
struct timer_list timer;
struct pardevice *pd;
int mode;
@@ -95,12 +94,247 @@
static short db9_genesis_btn[] = { BTN_START, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_MODE };
static short db9_cd32_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START };

-static char db9_buttons[DB9_MAX_PAD] = { 0, 1, 2, 4, 0, 6, 8, 8, 1, 1, 7 };
+static char db9_buttons[DB9_MAX_PAD] = { 0, 1, 2, 4, 0, 6, 8, 9, 1, 1, 7, 9, 9 };
static short *db9_btn[DB9_MAX_PAD] = { NULL, db9_multi_btn, db9_multi_btn, db9_genesis_btn, NULL, db9_genesis_btn,
- db9_genesis_btn, db9_cd32_btn, db9_multi_btn, db9_multi_btn, db9_cd32_btn };
+ db9_genesis_btn, db9_cd32_btn, db9_multi_btn, db9_multi_btn, db9_cd32_btn,
+ db9_cd32_btn, db9_cd32_btn };
static char *db9_name[DB9_MAX_PAD] = { NULL, "Multisystem joystick", "Multisystem joystick (2 fire)", "Genesis pad",
NULL, "Genesis 5 pad", "Genesis 6 pad", "Saturn pad", "Multisystem (0.8.0.2) joystick",
- "Multisystem (0.8.0.2-dual) joystick", "Amiga CD-32 pad" };
+ "Multisystem (0.8.0.2-dual) joystick", "Amiga CD-32 pad", "Saturn dpp", "Saturn dpp dual" };
+
+static const int db9_max_pads[DB9_MAX_PAD] = { 0, 1, 1, 1, 0, 1, 1, 6, 1, 2, 1, 6, 12 };
+static const int db9_num_axis[DB9_MAX_PAD] = { 0, 2, 2, 2, 0, 2, 2, 7, 2, 2, 2 ,7, 7 };
+static const short db9_abs[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_RZ, ABS_Z, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y };
+static const int db9_bidirectional[DB9_MAX_PAD] = { 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0 };
+static const int db9_reverse[DB9_MAX_PAD] = { 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0 };
+
+/*
+ * Saturn controllers
+ */
+#define DB9_SATURN_DELAY 300
+static const int db9_saturn_byte[] = { 1, 1, 1, 2, 2, 2, 2, 2, 1 };
+static const unsigned char db9_saturn_mask[] = { 0x04, 0x01, 0x02, 0x40, 0x20, 0x10, 0x08, 0x80, 0x08 };
+
+/*
+ * db9_saturn_write_sub() writes 2 bit data.
+ */
+static void db9_saturn_write_sub(struct parport *port, int type, unsigned char data, int powered, int pwr_sub)
+{
+ unsigned char c;
+
+ switch (type) {
+ case 1: /* DPP1 */
+ c = 0x80 | 0x30 | (powered ? 0x08 : 0) | (pwr_sub ? 0x04 : 0) | data;
+ parport_write_data(port, c);
+ break;
+ case 2: /* DPP2 */
+ c = 0x40 | data << 4 | (powered ? 0x08 : 0) | (pwr_sub ? 0x04 : 0) | 0x03;
+ parport_write_data(port, c);
+ break;
+ case 0: /* DB9 */
+ c = ((((data & 2) ? 2 : 0) | ((data & 1) ? 4 : 0)) ^ 0x02) | !powered;
+ parport_write_control(port, c);
+ break;
+ }
+}
+
+/*
+ * gc_saturn_read_sub() reads 4 bit data.
+ */
+static unsigned char db9_saturn_read_sub(struct parport *port, int type)
+{
+ unsigned char data;
+
+ if (type) {
+ /* DPP */
+ data = parport_read_status(port) ^ 0x80;
+ return (data & 0x80 ? 1 : 0) | (data & 0x40 ? 2 : 0)
+ | (data & 0x20 ? 4 : 0) | (data & 0x10 ? 8 : 0);
+ } else {
+ /* DB9 */
+ data = parport_read_data(port) & 0x0f;
+ return (data & 0x8 ? 1 : 0) | (data & 0x4 ? 2 : 0)
+ | (data & 0x2 ? 4 : 0) | (data & 0x1 ? 8 : 0);
+ }
+}
+
+/*
+ * db9_saturn_read_analog() sends clock and reads 8 bit data.
+ */
+static unsigned char db9_saturn_read_analog(struct parport *port, int type, int powered)
+{
+ unsigned char data;
+
+ db9_saturn_write_sub(port, type, 0, powered, 0);
+ udelay(DB9_SATURN_DELAY);
+ data = db9_saturn_read_sub(port, type) << 4;
+ db9_saturn_write_sub(port, type, 2, powered, 0);
+ udelay(DB9_SATURN_DELAY);
+ data |= db9_saturn_read_sub(port, type);
+ return data;
+}
+
+/*
+ * db9_saturn_read_packet() reads whole saturn packet at connector
+ * and returns device identifier code.
+ */
+static unsigned char db9_saturn_read_packet(struct parport *port, unsigned char *data, int type, int powered)
+{
+ int i, j;
+ unsigned char tmp;
+
+ db9_saturn_write_sub(port, type, 3, powered, 0);
+ data[0] = db9_saturn_read_sub(port, type);
+ switch (data[0] & 0x0f) {
+ case 0xf:
+ /* 1111 no pad */
+ return data[0] = 0xff;
+ case 0x4: case 0x4 | 0x8:
+ /* ?100 : digital controller */
+ db9_saturn_write_sub(port, type, 0, powered, 1);
+ data[2] = db9_saturn_read_sub(port, type) << 4;
+ db9_saturn_write_sub(port, type, 2, powered, 1);
+ data[1] = db9_saturn_read_sub(port, type) << 4;
+ db9_saturn_write_sub(port, type, 1, powered, 1);
+ data[1] |= db9_saturn_read_sub(port, type);
+ db9_saturn_write_sub(port, type, 3, powered, 1);
+ /* data[2] |= db9_saturn_read_sub(port, type); */
+ data[2] |= data[0];
+ return data[0] = 0x02;
+ case 0x1:
+ /* 0001 : analog controller or multitap */
+ db9_saturn_write_sub(port, type, 2, powered, 0);
+ udelay(DB9_SATURN_DELAY);
+ data[0] = db9_saturn_read_analog(port, type, powered);
+ if (data[0] != 0x41) {
+ /* read analog controller */
+ for (i = 0; i < (data[0] & 0x0f); i++)
+ data[i + 1] = db9_saturn_read_analog(port, type, powered);
+ db9_saturn_write_sub(port, type, 3, powered, 0);
+ return data[0];
+ } else {
+ /* read multitap */
+ if (db9_saturn_read_analog(port, type, powered) != 0x60)
+ return data[0] = 0xff;
+ for (i = 0; i < 60; i += 10) {
+ data[i] = db9_saturn_read_analog(port, type, powered);
+ if (data[i] != 0xff)
+ /* read each pad */
+ for (j = 0; j < (data[i] & 0x0f); j++)
+ data[i + j + 1] = db9_saturn_read_analog(port, type, powered);
+ }
+ db9_saturn_write_sub(port, type, 3, powered, 0);
+ return 0x41;
+ }
+ case 0x0:
+ /* 0000 : mouse */
+ db9_saturn_write_sub(port, type, 2, powered, 0);
+ udelay(DB9_SATURN_DELAY);
+ tmp = db9_saturn_read_analog(port, type, powered);
+ if (tmp == 0xff) {
+ for (i = 0; i < 3; i++)
+ data[i + 1] = db9_saturn_read_analog(port, type, powered);
+ db9_saturn_write_sub(port, type, 3, powered, 0);
+ return data[0] = 0xe3;
+ }
+ default:
+ return data[0];
+ }
+}
+
+/*
+ * db9_saturn_report() analyzes packet and reports.
+ */
+static int db9_saturn_report(unsigned char id, unsigned char data[60], struct input_dev *dev, int n, int max_pads)
+{
+ int tmp, i, j;
+
+ tmp = (id == 0x41) ? 60 : 10;
+ for (j = 0; (j < tmp) && (n < max_pads); j += 10, n++) {
+ switch (data[j]) {
+ case 0x16: /* multi controller (analog 4 axis) */
+ input_report_abs(dev + n, db9_abs[5], data[j + 6]);
+ case 0x15: /* mission stick (analog 3 axis) */
+ input_report_abs(dev + n, db9_abs[3], data[j + 4]);
+ input_report_abs(dev + n, db9_abs[4], data[j + 5]);
+ case 0x13: /* racing controller (analog 1 axis) */
+ input_report_abs(dev + n, db9_abs[2], data[j + 3]);
+ case 0x34: /* saturn keyboard (udlr ZXC ASD QE Esc) */
+ case 0x02: /* digital pad (digital 2 axis + buttons) */
+ input_report_abs(dev + n, db9_abs[0], !(data[j + 1] & 128) - !(data[j + 1] & 64));
+ input_report_abs(dev + n, db9_abs[1], !(data[j + 1] & 32) - !(data[j + 1] & 16));
+ for (i = 0; i < 9; i++)
+ input_report_key(dev + n, db9_cd32_btn[i], ~data[j + db9_saturn_byte[i]] & db9_saturn_mask[i]);
+ break;
+ case 0x19: /* mission stick x2 (analog 6 axis + buttons) */
+ input_report_abs(dev + n, db9_abs[0], !(data[j + 1] & 128) - !(data[j + 1] & 64));
+ input_report_abs(dev + n, db9_abs[1], !(data[j + 1] & 32) - !(data[j + 1] & 16));
+ for (i = 0; i < 9; i++)
+ input_report_key(dev + n, db9_cd32_btn[i], ~data[j + db9_saturn_byte[i]] & db9_saturn_mask[i]);
+ input_report_abs(dev + n, db9_abs[2], data[j + 3]);
+ input_report_abs(dev + n, db9_abs[3], data[j + 4]);
+ input_report_abs(dev + n, db9_abs[4], data[j + 5]);
+ /*
+ input_report_abs(dev + n, db9_abs[8], (data[j + 6] & 128 ? 0 : 1) - (data[j + 6] & 64 ? 0 : 1));
+ input_report_abs(dev + n, db9_abs[9], (data[j + 6] & 32 ? 0 : 1) - (data[j + 6] & 16 ? 0 : 1));
+ */
+ input_report_abs(dev + n, db9_abs[6], data[j + 7]);
+ input_report_abs(dev + n, db9_abs[7], data[j + 8]);
+ input_report_abs(dev + n, db9_abs[5], data[j + 9]);
+ break;
+ case 0xd3: /* sankyo ff (analog 1 axis + stop btn) */
+ input_report_key(dev + n, BTN_A, data[j + 3] & 0x80);
+ input_report_abs(dev + n, db9_abs[2], data[j + 3] & 0x7f);
+ break;
+ case 0xe3: /* shuttle mouse (analog 2 axis + buttons. signed value) */
+ input_report_key(dev + n, BTN_START, data[j + 1] & 0x08);
+ input_report_key(dev + n, BTN_A, data[j + 1] & 0x04);
+ input_report_key(dev + n, BTN_C, data[j + 1] & 0x02);
+ input_report_key(dev + n, BTN_B, data[j + 1] & 0x01);
+ input_report_abs(dev + n, db9_abs[2], data[j + 2] ^ 0x80);
+ input_report_abs(dev + n, db9_abs[3], (0xff-(data[j + 3] ^ 0x80))+1); /* */
+ break;
+ case 0xff:
+ default: /* no pad */
+ input_report_abs(dev + n, db9_abs[0], 0);
+ input_report_abs(dev + n, db9_abs[1], 0);
+ for (i = 0; i < 9; i++)
+ input_report_key(dev + n, db9_cd32_btn[i], 0);
+ break;
+ }
+ }
+ return n;
+}
+
+static int db9_saturn(int mode, struct parport *port, struct input_dev *dev)
+{
+ unsigned char id, data[60];
+ int type, n, max_pads;
+ int tmp, i;
+
+ switch (mode) {
+ case DB9_SATURN_PAD:
+ type = 0;
+ n = 1;
+ break;
+ case DB9_SATURN_DPP:
+ type = 1;
+ n = 1;
+ break;
+ case DB9_SATURN_DPP_2:
+ type = 1;
+ n = 2;
+ break;
+ default:
+ return -1;
+ }
+ max_pads = min(db9_max_pads[mode], DB9_MAX_DEVICES);
+ for (tmp = 0, i = 0; i < n; i++) {
+ id = db9_saturn_read_packet(port, data, type + i, 1);
+ tmp = db9_saturn_report(id, data, dev, tmp, max_pads);
+ }
+ return 0;
+}

static void db9_timer(unsigned long private)
{
@@ -221,28 +455,10 @@
break;

case DB9_SATURN_PAD:
+ case DB9_SATURN_DPP:
+ case DB9_SATURN_DPP_2:

- parport_write_control(port, DB9_SATURN0);
- data = parport_read_data(port);
-
- input_report_key(dev, BTN_Y, ~data & DB9_LEFT);
- input_report_key(dev, BTN_Z, ~data & DB9_DOWN);
- input_report_key(dev, BTN_TL, ~data & DB9_UP);
- input_report_key(dev, BTN_TR, ~data & DB9_RIGHT);
-
- parport_write_control(port, DB9_SATURN2);
- data = parport_read_data(port);
-
- input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
- input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
-
- parport_write_control(port, DB9_NORMAL);
- data = parport_read_data(port);
-
- input_report_key(dev, BTN_A, ~data & DB9_LEFT);
- input_report_key(dev, BTN_B, ~data & DB9_UP);
- input_report_key(dev, BTN_C, ~data & DB9_DOWN);
- input_report_key(dev, BTN_X, ~data & DB9_RIGHT);
+ db9_saturn(db9->mode, port, dev);
break;

case DB9_CD32_PAD:
@@ -276,8 +492,10 @@
if (!db9->used++) {
parport_claim(db9->pd);
parport_write_data(port, 0xff);
- parport_data_reverse(port);
- parport_write_control(port, DB9_NORMAL);
+ if (db9_reverse[db9->mode]) {
+ parport_data_reverse(port);
+ parport_write_control(port, DB9_NORMAL);
+ }
mod_timer(&db9->timer, jiffies + DB9_REFRESH_TIME);
}

@@ -318,11 +536,13 @@
return NULL;
}

- if (!(pp->modes & PARPORT_MODE_TRISTATE) && config[1] != DB9_MULTI_0802) {
- printk(KERN_ERR "db9.c: specified parport is not bidirectional\n");
- return NULL;
+ if (db9_bidirectional[config[1]]) {
+ if (!(pp->modes & PARPORT_MODE_TRISTATE)) {
+ printk(KERN_ERR "db9.c: specified parport is not bidirectional\n");
+ return NULL;
+ }
}
-
+
if (!(db9 = kmalloc(sizeof(struct db9), GFP_KERNEL)))
return NULL;
memset(db9, 0, sizeof(struct db9));
@@ -340,7 +560,7 @@
return NULL;
}

- for (i = 0; i < 1 + (db9->mode == DB9_MULTI_0802_2); i++) {
+ for (i = 0; i < (min(db9_max_pads[db9->mode], DB9_MAX_DEVICES)); i++) {

db9->dev[i].private = db9;
db9->dev[i].open = db9_open;
@@ -353,14 +573,19 @@
db9->dev[i].idversion = 0x0100;

db9->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
- db9->dev[i].absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
-
for (j = 0; j < db9_buttons[db9->mode]; j++)
set_bit(db9_btn[db9->mode][j], db9->dev[i].keybit);
-
- db9->dev[i].absmin[ABS_X] = -1; db9->dev[i].absmax[ABS_X] = 1;
- db9->dev[i].absmin[ABS_Y] = -1; db9->dev[i].absmax[ABS_Y] = 1;
-
+ for (j = 0; j < db9_num_axis[db9->mode]; j++) {
+ set_bit(db9_abs[j], db9->dev[i].absbit);
+ if (j < 2) {
+ db9->dev[i].absmin[db9_abs[j]] = -1;
+ db9->dev[i].absmax[db9_abs[j]] = 1;
+ } else {
+ db9->dev[i].absmin[db9_abs[j]] = 1;
+ db9->dev[i].absmax[db9_abs[j]] = 255;
+ db9->dev[i].absflat[db9_abs[j]] = 0;
+ }
+ }
input_register_device(db9->dev + i);
printk(KERN_INFO "input%d: %s on %s\n",
db9->dev[i].number, db9_name[db9->mode], db9->pd->port->name);
@@ -414,7 +639,7 @@

for (i = 0; i < 3; i++)
if (db9_base[i]) {
- for (j = 0; j < 1 + (db9_base[i]->mode == DB9_MULTI_0802_2); j++)
+ for (j = 0; j < min(db9_max_pads[db9_base[i]->mode], DB9_MAX_DEVICES); j++)
input_unregister_device(db9_base[i]->dev + j);
parport_unregister_device(db9_base[i]->pd);
}



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