[PATCH] drivers/input/joystick: convert to dynamic input_dev allocation

Input: convert drivers/input/joystick to dynamic input_dev allocation

This is required for input_dev sysfs integration

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 176 insertions, 116 deletions

diff --git a/drivers/input/joystick/db9.c b/drivers/input/joystick/db9.c
index 2a3e4bb2da50..499344c72756 100644
--- a/drivers/input/joystick/db9.c
+++ b/drivers/input/joystick/db9.c
@@ -43,25 +43,28 @@ MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 MODULE_DESCRIPTION("Atari, Amstrad, Commodore, Amiga, Sega, etc. joystick driver");
 MODULE_LICENSE("GPL");
 
-static int db9[] __initdata = { -1, 0 };
-static int db9_nargs __initdata = 0;
-module_param_array_named(dev, db9, int, &db9_nargs, 0);
-MODULE_PARM_DESC(dev, "Describes first attached device (<parport#>,<type>)");
+struct db9_config {
+        int args[2];
+        int nargs;
+};
 
-static int db9_2[] __initdata = { -1, 0 };
-static int db9_nargs_2 __initdata = 0;
-module_param_array_named(dev2, db9_2, int, &db9_nargs_2, 0);
-MODULE_PARM_DESC(dev2, "Describes second attached device (<parport#>,<type>)");
+#define DB9_MAX_PORTS           3
+static struct db9_config db9[DB9_MAX_PORTS] __initdata;
 
-static int db9_3[] __initdata = { -1, 0 };
-static int db9_nargs_3 __initdata = 0;
-module_param_array_named(dev3, db9_3, int, &db9_nargs_3, 0);
+module_param_array_named(dev, db9[0].args, int, &db9[0].nargs, 0);
+MODULE_PARM_DESC(dev, "Describes first attached device (<parport#>,<type>)");
+module_param_array_named(dev2, db9[1].args, int, &db9[0].nargs, 0);
+MODULE_PARM_DESC(dev2, "Describes second attached device (<parport#>,<type>)");
+module_param_array_named(dev3, db9[2].args, int, &db9[2].nargs, 0);
 MODULE_PARM_DESC(dev3, "Describes third attached device (<parport#>,<type>)");
 
 __obsolete_setup("db9=");
 __obsolete_setup("db9_2=");
 __obsolete_setup("db9_3=");
 
+#define DB9_ARG_PARPORT         0
+#define DB9_ARG_MODE            1
+
 #define DB9_MULTI_STICK         0x01
 #define DB9_MULTI2_STICK        0x02
 #define DB9_GENESIS_PAD         0x03
@@ -87,40 +90,53 @@ __obsolete_setup("db9_3=");
 #define DB9_NORMAL              0x0a
 #define DB9_NOSELECT            0x08
 
-#define DB9_MAX_DEVICES         2
-
 #define DB9_GENESIS6_DELAY      14
 #define DB9_REFRESH_TIME        HZ/100
 
+#define DB9_MAX_DEVICES         2
+
+struct db9_mode_data {
+        const char *name;
+        const short *buttons;
+        int n_buttons;
+        int n_pads;
+        int n_axis;
+        int bidirectional;
+        int reverse;
+};
+
 struct db9 {
-        struct input_dev dev[DB9_MAX_DEVICES];
+        struct input_dev *dev[DB9_MAX_DEVICES];
         struct timer_list timer;
         struct pardevice *pd;
         int mode;
         int used;
         struct semaphore sem;
-        char phys[2][32];
+        char phys[DB9_MAX_DEVICES][32];
 };
 
 static struct db9 *db9_base[3];
 
-static short db9_multi_btn[] = { BTN_TRIGGER, BTN_THUMB };
-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, 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_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", "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_multi_btn[] = { BTN_TRIGGER, BTN_THUMB };
+static const short db9_genesis_btn[] = { BTN_START, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_MODE };
+static const short db9_cd32_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START };
 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 };
+
+static const struct db9_mode_data db9_modes[] = {
+        { NULL,                                  NULL,            0,  0,  0,  0,  0 },
+        { "Multisystem joystick",                db9_multi_btn,   1,  1,  2,  1,  1 },
+        { "Multisystem joystick (2 fire)",       db9_multi_btn,   2,  1,  2,  1,  1 },
+        { "Genesis pad",                         db9_genesis_btn, 4,  1,  2,  1,  1 },
+        { NULL,                                  NULL,            0,  0,  0,  0,  0 },
+        { "Genesis 5 pad",                       db9_genesis_btn, 6,  1,  2,  1,  1 },
+        { "Genesis 6 pad",                       db9_genesis_btn, 8,  1,  2,  1,  1 },
+        { "Saturn pad",                          db9_cd32_btn,    9,  6,  7,  0,  1 },
+        { "Multisystem (0.8.0.2) joystick",      db9_multi_btn,   1,  1,  2,  1,  1 },
+        { "Multisystem (0.8.0.2-dual) joystick", db9_multi_btn,   1,  2,  2,  1,  1 },
+        { "Amiga CD-32 pad",                     db9_cd32_btn,    7,  1,  2,  1,  1 },
+        { "Saturn dpp",                          db9_cd32_btn,    9,  6,  7,  0,  0 },
+        { "Saturn dpp dual",                     db9_cd32_btn,    9,  12, 7,  0,  0 },
+};
 
 /*
  * Saturn controllers
@@ -342,7 +358,7 @@ static int db9_saturn(int mode, struct parport *port, struct input_dev *dev)
         default:
                 return -1;
         }
-        max_pads = min(db9_max_pads[mode], DB9_MAX_DEVICES);
+        max_pads = min(db9_modes[mode].n_pads, 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);
@@ -354,17 +370,18 @@ static void db9_timer(unsigned long private)
 {
         struct db9 *db9 = (void *) private;
         struct parport *port = db9->pd->port;
-        struct input_dev *dev = db9->dev;
+        struct input_dev *dev = db9->dev[0];
+        struct input_dev *dev2 = db9->dev[1];
         int data, i;
 
-        switch(db9->mode) {
+        switch (db9->mode) {
                 case DB9_MULTI_0802_2:
 
                         data = parport_read_data(port) >> 3;
 
-                        input_report_abs(dev + 1, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
-                        input_report_abs(dev + 1, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
-                        input_report_key(dev + 1, BTN_TRIGGER, ~data & DB9_FIRE1);
+                        input_report_abs(dev2, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
+                        input_report_abs(dev2, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
+                        input_report_key(dev2, BTN_TRIGGER, ~data & DB9_FIRE1);
 
                 case DB9_MULTI_0802:
 
@@ -405,7 +422,7 @@ static void db9_timer(unsigned long private)
                         input_report_key(dev, BTN_C, ~data & DB9_FIRE2);
 
                         parport_write_control(port, DB9_NORMAL);
-                        data=parport_read_data(port);
+                        data = parport_read_data(port);
 
                         input_report_key(dev, BTN_A,     ~data & DB9_FIRE1);
                         input_report_key(dev, BTN_START, ~data & DB9_FIRE2);
@@ -414,7 +431,7 @@ static void db9_timer(unsigned long private)
                 case DB9_GENESIS5_PAD:
 
                         parport_write_control(port, DB9_NOSELECT);
-                        data=parport_read_data(port);
+                        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));
@@ -422,7 +439,7 @@ static void db9_timer(unsigned long private)
                         input_report_key(dev, BTN_C, ~data & DB9_FIRE2);
 
                         parport_write_control(port, DB9_NORMAL);
-                        data=parport_read_data(port);
+                        data = parport_read_data(port);
 
                         input_report_key(dev, BTN_A,     ~data & DB9_FIRE1);
                         input_report_key(dev, BTN_X,     ~data & DB9_FIRE2);
@@ -434,7 +451,7 @@ static void db9_timer(unsigned long private)
 
                         parport_write_control(port, DB9_NOSELECT); /* 1 */
                         udelay(DB9_GENESIS6_DELAY);
-                        data=parport_read_data(port);
+                        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));
@@ -443,7 +460,7 @@ static void db9_timer(unsigned long private)
 
                         parport_write_control(port, DB9_NORMAL);
                         udelay(DB9_GENESIS6_DELAY);
-                        data=parport_read_data(port);
+                        data = parport_read_data(port);
 
                         input_report_key(dev, BTN_A, ~data & DB9_FIRE1);
                         input_report_key(dev, BTN_START, ~data & DB9_FIRE2);
@@ -477,7 +494,7 @@ static void db9_timer(unsigned long private)
 
                 case DB9_CD32_PAD:
 
-                        data=parport_read_data(port);
+                        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));
@@ -489,7 +506,7 @@ static void db9_timer(unsigned long private)
                                 parport_write_control(port, 0x02);
                                 parport_write_control(port, 0x0a);
                                 input_report_key(dev, db9_cd32_btn[i], ~data & DB9_FIRE2);
-                                }
+                        }
 
                         parport_write_control(port, 0x00);
                         break;
@@ -513,7 +530,7 @@ static int db9_open(struct input_dev *dev)
         if (!db9->used++) {
                 parport_claim(db9->pd);
                 parport_write_data(port, 0xff);
-                if (db9_reverse[db9->mode]) {
+                if (db9_modes[db9->mode].reverse) {
                         parport_data_reverse(port);
                         parport_write_control(port, DB9_NORMAL);
                 }
@@ -539,117 +556,160 @@ static void db9_close(struct input_dev *dev)
         up(&db9->sem);
 }
 
-static struct db9 __init *db9_probe(int *config, int nargs)
+static struct db9 __init *db9_probe(int parport, int mode)
 {
         struct db9 *db9;
+        const struct db9_mode_data *db9_mode;
         struct parport *pp;
+        struct pardevice *pd;
+        struct input_dev *input_dev;
         int i, j;
+        int err;
 
-        if (config[0] < 0)
-                return NULL;
-
-        if (nargs < 2) {
-                printk(KERN_ERR "db9.c: Device type must be specified.\n");
-                return NULL;
+        if (mode < 1 || mode >= DB9_MAX_PAD || !db9_modes[mode].n_buttons) {
+                printk(KERN_ERR "db9.c: Bad device type %d\n", mode);
+                err = -EINVAL;
+                goto err_out;
         }
 
-        if (config[1] < 1 || config[1] >= DB9_MAX_PAD || !db9_buttons[config[1]]) {
-                printk(KERN_ERR "db9.c: bad config\n");
-                return NULL;
-        }
+        db9_mode = &db9_modes[mode];
 
-        pp = parport_find_number(config[0]);
+        pp = parport_find_number(parport);
         if (!pp) {
                 printk(KERN_ERR "db9.c: no such parport\n");
-                return NULL;
+                err = -ENODEV;
+                goto err_out;
         }
 
-        if (db9_bidirectional[config[1]]) {
-                if (!(pp->modes & PARPORT_MODE_TRISTATE)) {
-                        printk(KERN_ERR "db9.c: specified parport is not bidirectional\n");
-                        parport_put_port(pp);
-                        return NULL;
-                }
+        if (db9_mode[mode].bidirectional && !(pp->modes & PARPORT_MODE_TRISTATE)) {
+                printk(KERN_ERR "db9.c: specified parport is not bidirectional\n");
+                err = -EINVAL;
+                goto err_put_pp;
+        }
+
+        pd = parport_register_device(pp, "db9", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
+        if (!pd) {
+                printk(KERN_ERR "db9.c: parport busy already - lp.o loaded?\n");
+                err = -EBUSY;
+                goto err_put_pp;
         }
 
-        if (!(db9 = kzalloc(sizeof(struct db9), GFP_KERNEL))) {
-                parport_put_port(pp);
-                return NULL;
+        db9 = kzalloc(sizeof(struct db9), GFP_KERNEL);
+        if (!db9) {
+                printk(KERN_ERR "db9.c: Not enough memory\n");
+                err = -ENOMEM;
+                goto err_unreg_pardev;
         }
 
         init_MUTEX(&db9->sem);
-        db9->mode = config[1];
+        db9->pd = pd;
+        db9->mode = mode;
         init_timer(&db9->timer);
         db9->timer.data = (long) db9;
         db9->timer.function = db9_timer;
 
-        db9->pd = parport_register_device(pp, "db9", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
-        parport_put_port(pp);
-
-        if (!db9->pd) {
-                printk(KERN_ERR "db9.c: parport busy already - lp.o loaded?\n");
-                kfree(db9);
-                return NULL;
-        }
+        for (i = 0; i < (min(db9_mode->n_pads, DB9_MAX_DEVICES)); i++) {
 
-        for (i = 0; i < (min(db9_max_pads[db9->mode], DB9_MAX_DEVICES)); i++) {
+                db9->dev[i] = input_dev = input_allocate_device();
+                if (!input_dev) {
+                        printk(KERN_ERR "db9.c: Not enough memory for input device\n");
+                        err = -ENOMEM;
+                        goto err_free_devs;
+                }
 
                 sprintf(db9->phys[i], "%s/input%d", db9->pd->port->name, i);
 
-                db9->dev[i].private = db9;
-                db9->dev[i].open = db9_open;
-                db9->dev[i].close = db9_close;
-
-                db9->dev[i].name = db9_name[db9->mode];
-                db9->dev[i].phys = db9->phys[i];
-                db9->dev[i].id.bustype = BUS_PARPORT;
-                db9->dev[i].id.vendor = 0x0002;
-                db9->dev[i].id.product = config[1];
-                db9->dev[i].id.version = 0x0100;
-
-                db9->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
-                for (j = 0; j < db9_buttons[db9->mode]; j++)
-                        set_bit(db9_btn[db9->mode][j], db9->dev[i].keybit);
-                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_dev->name = db9_mode->name;
+                input_dev->phys = db9->phys[i];
+                input_dev->id.bustype = BUS_PARPORT;
+                input_dev->id.vendor = 0x0002;
+                input_dev->id.product = mode;
+                input_dev->id.version = 0x0100;
+                input_dev->private = db9;
+
+                input_dev->open = db9_open;
+                input_dev->close = db9_close;
+
+                input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+                for (j = 0; j < db9_mode->n_buttons; j++)
+                        set_bit(db9_mode->buttons[j], input_dev->keybit);
+                for (j = 0; j < db9_mode->n_axis; j++) {
+                        if (j < 2)
+                                input_set_abs_params(input_dev, db9_abs[j], -1, 1, 0, 0);
+                        else
+                                input_set_abs_params(input_dev, db9_abs[j], 1, 255, 0, 0);
                 }
-                input_register_device(db9->dev + i);
-                printk(KERN_INFO "input: %s on %s\n", db9->dev[i].name, db9->pd->port->name);
+
+                input_register_device(input_dev);
         }
 
+        parport_put_port(pp);
         return db9;
+
+ err_free_devs:
+        while (--i >= 0)
+                input_unregister_device(db9->dev[i]);
+        kfree(db9);
+ err_unreg_pardev:
+        parport_unregister_device(pd);
+ err_put_pp:
+        parport_put_port(pp);
+ err_out:
+        return ERR_PTR(err);
+}
+
+static void __exit db9_remove(struct db9 *db9)
+{
+        int i;
+
+        for (i = 0; i < min(db9_modes[db9->mode].n_pads, DB9_MAX_DEVICES); i++)
+                input_unregister_device(db9->dev[i]);
+        parport_unregister_device(db9->pd);
+        kfree(db9);
 }
 
 static int __init db9_init(void)
 {
-        db9_base[0] = db9_probe(db9, db9_nargs);
-        db9_base[1] = db9_probe(db9_2, db9_nargs_2);
-        db9_base[2] = db9_probe(db9_3, db9_nargs_3);
+        int i;
+        int have_dev = 0;
+        int err = 0;
+
+        for (i = 0; i < DB9_MAX_PORTS; i++) {
+                if (db9[i].nargs == 0 || db9[i].args[DB9_ARG_PARPORT] < 0)
+                        continue;
+
+                if (db9[i].nargs < 2) {
+                        printk(KERN_ERR "db9.c: Device type must be specified.\n");
+                        err = -EINVAL;
+                        break;
+                }
+
+                db9_base[i] = db9_probe(db9[i].args[DB9_ARG_PARPORT],
+                                        db9[i].args[DB9_ARG_MODE]);
+                if (IS_ERR(db9_base[i])) {
+                        err = PTR_ERR(db9_base[i]);
+                        break;
+                }
+
+                have_dev = 1;
+        }
 
-        if (db9_base[0] || db9_base[1] || db9_base[2])
-                return 0;
+        if (err) {
+                while (--i >= 0)
+                        db9_remove(db9_base[i]);
+                return err;
+        }
 
-        return -ENODEV;
+        return have_dev ? 0 : -ENODEV;
 }
 
 static void __exit db9_exit(void)
 {
-        int i, j;
+        int i;
 
-        for (i = 0; i < 3; i++)
-                if (db9_base[i]) {
-                        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);
-        }
+        for (i = 0; i < DB9_MAX_PORTS; i++)
+                if (db9_base[i])
+                        db9_remove(db9_base[i]);
 }
 
 module_init(db9_init);