From 72529c65a5399be02c619ed8592e38a3e5f049f3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Michal=20Mal=C3=BD?= Date: Wed, 8 Apr 2015 22:56:46 +0200 Subject: [PATCH] HID: hid-lg4ff: Make lg4ff_wheel_data a separate structure MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Make lg4ff_wheel_data a separate structure stored within lg4ff_device_entry. Adjust the initialization process accordingly. Signed-off-by: Michal Malý Signed-off-by: Jiri Kosina --- drivers/hid/hid-lg4ff.c | 166 +++++++++++++++++++++------------------- 1 file changed, 88 insertions(+), 78 deletions(-) diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c index 04822fb3e330..0f8d72694aaa 100644 --- a/drivers/hid/hid-lg4ff.c +++ b/drivers/hid/hid-lg4ff.c @@ -71,7 +71,7 @@ static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range); static void lg4ff_set_range_g25(struct hid_device *hid, u16 range); -struct lg4ff_device_entry { +struct lg4ff_wheel_data { u32 product_id; u16 range; u16 min_range; @@ -84,9 +84,14 @@ struct lg4ff_device_entry { const char *real_tag; const char *real_name; u16 real_product_id; + void (*set_range)(struct hid_device *hid, u16 range); }; +struct lg4ff_device_entry { + struct lg4ff_wheel_data wdata; +}; + static const signed short lg4ff_wheel_effects[] = { FF_CONSTANT, FF_AUTOCENTER, @@ -278,11 +283,11 @@ int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field, return 0; } - switch (entry->product_id) { + switch (entry->wdata.product_id) { case USB_DEVICE_ID_LOGITECH_DFP_WHEEL: switch (usage->code) { case ABS_X: - new_value = lg4ff_adjust_dfp_x_axis(value, entry->range); + new_value = lg4ff_adjust_dfp_x_axis(value, entry->wdata.range); input_event(field->hidinput->input, usage->type, usage->code, new_value); return 1; default: @@ -383,7 +388,7 @@ static void lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude) } /* Adjust for non-MOMO wheels */ - switch (entry->product_id) { + switch (entry->wdata.product_id) { case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL: case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2: break; @@ -605,23 +610,23 @@ static ssize_t lg4ff_alternate_modes_show(struct device *dev, struct device_attr return 0; } - if (!entry->real_name) { + if (!entry->wdata.real_name) { hid_err(hid, "NULL pointer to string\n"); return 0; } for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) { - if (entry->alternate_modes & BIT(i)) { + if (entry->wdata.alternate_modes & BIT(i)) { /* Print tag and full name */ count += scnprintf(buf + count, PAGE_SIZE - count, "%s: %s", lg4ff_alternate_modes[i].tag, - !lg4ff_alternate_modes[i].product_id ? entry->real_name : lg4ff_alternate_modes[i].name); + !lg4ff_alternate_modes[i].product_id ? entry->wdata.real_name : lg4ff_alternate_modes[i].name); if (count >= PAGE_SIZE - 1) return count; /* Mark the currently active mode with an asterisk */ - if (lg4ff_alternate_modes[i].product_id == entry->product_id || - (lg4ff_alternate_modes[i].product_id == 0 && entry->product_id == entry->real_product_id)) + if (lg4ff_alternate_modes[i].product_id == entry->wdata.product_id || + (lg4ff_alternate_modes[i].product_id == 0 && entry->wdata.product_id == entry->wdata.real_product_id)) count += scnprintf(buf + count, PAGE_SIZE - count, " *\n"); else count += scnprintf(buf + count, PAGE_SIZE - count, "\n"); @@ -674,10 +679,10 @@ static ssize_t lg4ff_alternate_modes_store(struct device *dev, struct device_att const u16 mode_product_id = lg4ff_alternate_modes[i].product_id; const char *tag = lg4ff_alternate_modes[i].tag; - if (entry->alternate_modes & BIT(i)) { + if (entry->wdata.alternate_modes & BIT(i)) { if (!strcmp(tag, lbuf)) { if (!mode_product_id) - target_product_id = entry->real_product_id; + target_product_id = entry->wdata.real_product_id; else target_product_id = mode_product_id; break; @@ -692,24 +697,24 @@ static ssize_t lg4ff_alternate_modes_store(struct device *dev, struct device_att } kfree(lbuf); /* Not needed anymore */ - if (target_product_id == entry->product_id) /* Nothing to do */ + if (target_product_id == entry->wdata.product_id) /* Nothing to do */ return count; /* Automatic switching has to be disabled for the switch to DF-EX mode to work correctly */ if (target_product_id == USB_DEVICE_ID_LOGITECH_WHEEL && !lg4ff_no_autoswitch) { hid_info(hid, "\"%s\" cannot be switched to \"DF-EX\" mode. Load the \"hid_logitech\" module with \"lg4ff_no_autoswitch=1\" parameter set and try again\n", - entry->real_name); + entry->wdata.real_name); return -EINVAL; } /* Take care of hardware limitations */ - if ((entry->real_product_id == USB_DEVICE_ID_LOGITECH_DFP_WHEEL || entry->real_product_id == USB_DEVICE_ID_LOGITECH_G25_WHEEL) && - entry->product_id > target_product_id) { - hid_info(hid, "\"%s\" cannot be switched back into \"%s\" mode\n", entry->real_name, lg4ff_alternate_modes[i].name); + if ((entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_DFP_WHEEL || entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_G25_WHEEL) && + entry->wdata.product_id > target_product_id) { + hid_info(hid, "\"%s\" cannot be switched back into \"%s\" mode\n", entry->wdata.real_name, lg4ff_alternate_modes[i].name); return -EINVAL; } - s = lg4ff_get_mode_switch_command(entry->real_product_id, target_product_id); + s = lg4ff_get_mode_switch_command(entry->wdata.real_product_id, target_product_id); if (!s) { hid_err(hid, "Invalid target product ID %X\n", target_product_id); return -EINVAL; @@ -741,7 +746,7 @@ static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *att return 0; } - count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->range); + count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->wdata.range); return count; } @@ -768,13 +773,13 @@ static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *at } if (range == 0) - range = entry->max_range; + range = entry->wdata.max_range; /* Check if the wheel supports range setting * and that the range is within limits for the wheel */ - if (entry->set_range != NULL && range >= entry->min_range && range <= entry->max_range) { - entry->set_range(hid, range); - entry->range = range; + if (entry->wdata.set_range && range >= entry->wdata.min_range && range <= entry->wdata.max_range) { + entry->wdata.set_range(hid, range); + entry->wdata.range = range; } return count; @@ -800,12 +805,12 @@ static ssize_t lg4ff_real_id_show(struct device *dev, struct device_attribute *a return 0; } - if (!entry->real_tag || !entry->real_name) { + if (!entry->wdata.real_tag || !entry->wdata.real_name) { hid_err(hid, "NULL pointer to string\n"); return 0; } - count = scnprintf(buf, PAGE_SIZE, "%s: %s\n", entry->real_tag, entry->real_name); + count = scnprintf(buf, PAGE_SIZE, "%s: %s\n", entry->wdata.real_tag, entry->wdata.real_name); return count; } @@ -855,15 +860,15 @@ static void lg4ff_led_set_brightness(struct led_classdev *led_cdev, } for (i = 0; i < 5; i++) { - if (led_cdev != entry->led[i]) + if (led_cdev != entry->wdata.led[i]) continue; - state = (entry->led_state >> i) & 1; + state = (entry->wdata.led_state >> i) & 1; if (value == LED_OFF && state) { - entry->led_state &= ~(1 << i); - lg4ff_set_leds(hid, entry->led_state); + entry->wdata.led_state &= ~(1 << i); + lg4ff_set_leds(hid, entry->wdata.led_state); } else if (value != LED_OFF && !state) { - entry->led_state |= 1 << i; - lg4ff_set_leds(hid, entry->led_state); + entry->wdata.led_state |= 1 << i; + lg4ff_set_leds(hid, entry->wdata.led_state); } break; } @@ -890,8 +895,8 @@ static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cde } for (i = 0; i < 5; i++) - if (led_cdev == entry->led[i]) { - value = (entry->led_state >> i) & 1; + if (led_cdev == entry->wdata.led[i]) { + value = (entry->wdata.led_state >> i) & 1; break; } @@ -1002,6 +1007,16 @@ int lg4ff_init(struct hid_device *hid) if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7)) return -1; + drv_data = hid_get_drvdata(hid); + if (!drv_data) { + hid_err(hid, "Cannot add device, private driver data not allocated\n"); + return -1; + } + entry = kzalloc(sizeof(*entry), GFP_KERNEL); + if (!entry) + return -ENOMEM; + drv_data->device_props = entry; + /* Check if a multimode wheel has been connected and * handle it appropriately */ mmode_ret = lg4ff_handle_multimode_wheel(hid, &real_product_id, bcdDevice); @@ -1011,6 +1026,11 @@ int lg4ff_init(struct hid_device *hid) */ if (mmode_ret == LG4FF_MMODE_SWITCHED) return 0; + else if (mmode_ret < 0) { + hid_err(hid, "Unable to switch device mode during initialization, errno %d\n", mmode_ret); + error = mmode_ret; + goto err_init; + } /* Check what wheel has been connected */ for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) { @@ -1024,7 +1044,8 @@ int lg4ff_init(struct hid_device *hid) hid_err(hid, "This device is flagged to be handled by the lg4ff module but this module does not know how to handle it. " "Please report this as a bug to LKML, Simon Wood or " "Michal Maly \n"); - return -1; + error = -1; + goto err_init; } if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) { @@ -1035,7 +1056,8 @@ int lg4ff_init(struct hid_device *hid) if (mmode_idx == ARRAY_SIZE(lg4ff_multimode_wheels)) { hid_err(hid, "Device product ID %X is not listed as a multimode wheel", real_product_id); - return -1; + error = -1; + goto err_init; } } @@ -1046,33 +1068,18 @@ int lg4ff_init(struct hid_device *hid) error = input_ff_create_memless(dev, NULL, lg4ff_play); if (error) - return error; + goto err_init; - /* Get private driver data */ - drv_data = hid_get_drvdata(hid); - if (!drv_data) { - hid_err(hid, "Cannot add device, private driver data not allocated\n"); - return -1; - } - - /* Initialize device properties */ - entry = kzalloc(sizeof(struct lg4ff_device_entry), GFP_KERNEL); - if (!entry) { - hid_err(hid, "Cannot add device, insufficient memory to allocate device properties.\n"); - return -ENOMEM; - } - drv_data->device_props = entry; - - entry->product_id = lg4ff_devices[i].product_id; - entry->real_product_id = real_product_id; - entry->min_range = lg4ff_devices[i].min_range; - entry->max_range = lg4ff_devices[i].max_range; - entry->set_range = lg4ff_devices[i].set_range; + entry->wdata.product_id = lg4ff_devices[i].product_id; + entry->wdata.real_product_id = real_product_id; + entry->wdata.min_range = lg4ff_devices[i].min_range; + entry->wdata.max_range = lg4ff_devices[i].max_range; + entry->wdata.set_range = lg4ff_devices[i].set_range; if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) { BUG_ON(mmode_idx == -1); - entry->alternate_modes = lg4ff_multimode_wheels[mmode_idx].alternate_modes; - entry->real_tag = lg4ff_multimode_wheels[mmode_idx].real_tag; - entry->real_name = lg4ff_multimode_wheels[mmode_idx].real_name; + entry->wdata.alternate_modes = lg4ff_multimode_wheels[mmode_idx].alternate_modes; + entry->wdata.real_tag = lg4ff_multimode_wheels[mmode_idx].real_tag; + entry->wdata.real_name = lg4ff_multimode_wheels[mmode_idx].real_name; } /* Check if autocentering is available and @@ -1091,27 +1098,28 @@ int lg4ff_init(struct hid_device *hid) /* Create sysfs interface */ error = device_create_file(&hid->dev, &dev_attr_range); if (error) - return error; + goto err_init; if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) { error = device_create_file(&hid->dev, &dev_attr_real_id); if (error) - return error; + goto err_init; + error = device_create_file(&hid->dev, &dev_attr_alternate_modes); if (error) - return error; + goto err_init; } dbg_hid("sysfs interface created\n"); /* Set the maximum range to start with */ - entry->range = entry->max_range; - if (entry->set_range != NULL) - entry->set_range(hid, entry->range); + entry->wdata.range = entry->wdata.max_range; + if (entry->wdata.set_range) + entry->wdata.set_range(hid, entry->wdata.range); #ifdef CONFIG_LEDS_CLASS /* register led subsystem - G27 only */ - entry->led_state = 0; + entry->wdata.led_state = 0; for (j = 0; j < 5; j++) - entry->led[j] = NULL; + entry->wdata.led[j] = NULL; if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL) { struct led_classdev *led; @@ -1126,7 +1134,7 @@ int lg4ff_init(struct hid_device *hid) led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL); if (!led) { hid_err(hid, "can't allocate memory for LED %d\n", j); - goto err; + goto err_leds; } name = (void *)(&led[1]); @@ -1137,16 +1145,16 @@ int lg4ff_init(struct hid_device *hid) led->brightness_get = lg4ff_led_get_brightness; led->brightness_set = lg4ff_led_set_brightness; - entry->led[j] = led; + entry->wdata.led[j] = led; error = led_classdev_register(&hid->dev, led); if (error) { hid_err(hid, "failed to register LED %d. Aborting.\n", j); -err: +err_leds: /* Deregister LEDs (if any) */ for (j = 0; j < 5; j++) { - led = entry->led[j]; - entry->led[j] = NULL; + led = entry->wdata.led[j]; + entry->wdata.led[j] = NULL; if (!led) continue; led_classdev_unregister(led); @@ -1160,6 +1168,11 @@ out: #endif hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n"); return 0; + +err_init: + drv_data->device_props = NULL; + kfree(entry); + return error; } int lg4ff_deinit(struct hid_device *hid) @@ -1176,14 +1189,13 @@ int lg4ff_deinit(struct hid_device *hid) if (!entry) goto out; /* Nothing more to do */ - device_remove_file(&hid->dev, &dev_attr_range); - /* Multimode devices will have at least the "MODE_NATIVE" bit set */ - if (entry->alternate_modes) { + if (entry->wdata.alternate_modes) { device_remove_file(&hid->dev, &dev_attr_real_id); device_remove_file(&hid->dev, &dev_attr_alternate_modes); } + device_remove_file(&hid->dev, &dev_attr_range); #ifdef CONFIG_LEDS_CLASS { int j; @@ -1192,8 +1204,8 @@ int lg4ff_deinit(struct hid_device *hid) /* Deregister LEDs (if any) */ for (j = 0; j < 5; j++) { - led = entry->led[j]; - entry->led[j] = NULL; + led = entry->wdata.led[j]; + entry->wdata.led[j] = NULL; if (!led) continue; led_classdev_unregister(led); @@ -1202,9 +1214,7 @@ int lg4ff_deinit(struct hid_device *hid) } #endif - /* Deallocate memory */ kfree(entry); - out: dbg_hid("Device successfully unregistered\n"); return 0;