aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/hid/hid-lg4ff.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/hid/hid-lg4ff.c')
-rw-r--r--drivers/hid/hid-lg4ff.c600
1 files changed, 527 insertions, 73 deletions
diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index db0dd9b17e53..1232210b1cc5 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -30,23 +30,44 @@
#include "usbhid/usbhid.h"
#include "hid-lg.h"
+#include "hid-lg4ff.h"
#include "hid-ids.h"
-#define DFGT_REV_MAJ 0x13
-#define DFGT_REV_MIN 0x22
-#define DFGT2_REV_MIN 0x26
-#define DFP_REV_MAJ 0x11
-#define DFP_REV_MIN 0x06
-#define FFEX_REV_MAJ 0x21
-#define FFEX_REV_MIN 0x00
-#define G25_REV_MAJ 0x12
-#define G25_REV_MIN 0x22
-#define G27_REV_MAJ 0x12
-#define G27_REV_MIN 0x38
-#define G27_2_REV_MIN 0x39
-
#define to_hid_device(pdev) container_of(pdev, struct hid_device, dev)
+#define LG4FF_MMODE_IS_MULTIMODE 0
+#define LG4FF_MMODE_SWITCHED 1
+#define LG4FF_MMODE_NOT_MULTIMODE 2
+
+#define LG4FF_MODE_NATIVE_IDX 0
+#define LG4FF_MODE_DFEX_IDX 1
+#define LG4FF_MODE_DFP_IDX 2
+#define LG4FF_MODE_G25_IDX 3
+#define LG4FF_MODE_DFGT_IDX 4
+#define LG4FF_MODE_G27_IDX 5
+#define LG4FF_MODE_MAX_IDX 6
+
+#define LG4FF_MODE_NATIVE BIT(LG4FF_MODE_NATIVE_IDX)
+#define LG4FF_MODE_DFEX BIT(LG4FF_MODE_DFEX_IDX)
+#define LG4FF_MODE_DFP BIT(LG4FF_MODE_DFP_IDX)
+#define LG4FF_MODE_G25 BIT(LG4FF_MODE_G25_IDX)
+#define LG4FF_MODE_DFGT BIT(LG4FF_MODE_DFGT_IDX)
+#define LG4FF_MODE_G27 BIT(LG4FF_MODE_G27_IDX)
+
+#define LG4FF_DFEX_TAG "DF-EX"
+#define LG4FF_DFEX_NAME "Driving Force / Formula EX"
+#define LG4FF_DFP_TAG "DFP"
+#define LG4FF_DFP_NAME "Driving Force Pro"
+#define LG4FF_G25_TAG "G25"
+#define LG4FF_G25_NAME "G25 Racing Wheel"
+#define LG4FF_G27_TAG "G27"
+#define LG4FF_G27_NAME "G27 Racing Wheel"
+#define LG4FF_DFGT_TAG "DFGT"
+#define LG4FF_DFGT_NAME "Driving Force GT"
+
+#define LG4FF_FFEX_REV_MAJ 0x21
+#define LG4FF_FFEX_REV_MIN 0x00
+
static void hid_lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range);
@@ -59,6 +80,10 @@ struct lg4ff_device_entry {
__u8 led_state;
struct led_classdev *led[5];
#endif
+ u32 alternate_modes;
+ const char *real_tag;
+ const char *real_name;
+ u16 real_product_id;
struct list_head list;
void (*set_range)(struct hid_device *hid, u16 range);
};
@@ -77,6 +102,35 @@ struct lg4ff_wheel {
void (*set_range)(struct hid_device *hid, u16 range);
};
+struct lg4ff_compat_mode_switch {
+ const __u8 cmd_count; /* Number of commands to send */
+ const __u8 cmd[];
+};
+
+struct lg4ff_wheel_ident_info {
+ const u16 mask;
+ const u16 result;
+ const u16 real_product_id;
+};
+
+struct lg4ff_wheel_ident_checklist {
+ const u32 count;
+ const struct lg4ff_wheel_ident_info *models[];
+};
+
+struct lg4ff_multimode_wheel {
+ const u16 product_id;
+ const u32 alternate_modes;
+ const char *real_tag;
+ const char *real_name;
+};
+
+struct lg4ff_alternate_mode {
+ const u16 product_id;
+ const char *tag;
+ const char *name;
+};
+
static const struct lg4ff_wheel lg4ff_devices[] = {
{USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
{USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
@@ -88,46 +142,106 @@ static const struct lg4ff_wheel lg4ff_devices[] = {
{USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}
};
-struct lg4ff_native_cmd {
- const __u8 cmd_num; /* Number of commands to send */
- const __u8 cmd[];
+static const struct lg4ff_multimode_wheel lg4ff_multimode_wheels[] = {
+ {USB_DEVICE_ID_LOGITECH_DFP_WHEEL,
+ LG4FF_MODE_NATIVE | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
+ LG4FF_DFP_TAG, LG4FF_DFP_NAME},
+ {USB_DEVICE_ID_LOGITECH_G25_WHEEL,
+ LG4FF_MODE_NATIVE | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
+ LG4FF_G25_TAG, LG4FF_G25_NAME},
+ {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL,
+ LG4FF_MODE_NATIVE | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
+ LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
+ {USB_DEVICE_ID_LOGITECH_G27_WHEEL,
+ LG4FF_MODE_NATIVE | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
+ LG4FF_G27_TAG, LG4FF_G27_NAME},
};
-struct lg4ff_usb_revision {
- const __u16 rev_maj;
- const __u16 rev_min;
- const struct lg4ff_native_cmd *command;
+static const struct lg4ff_alternate_mode lg4ff_alternate_modes[] = {
+ [LG4FF_MODE_NATIVE_IDX] = {0, "native", ""},
+ [LG4FF_MODE_DFEX_IDX] = {USB_DEVICE_ID_LOGITECH_WHEEL, LG4FF_DFEX_TAG, LG4FF_DFEX_NAME},
+ [LG4FF_MODE_DFP_IDX] = {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, LG4FF_DFP_TAG, LG4FF_DFP_NAME},
+ [LG4FF_MODE_G25_IDX] = {USB_DEVICE_ID_LOGITECH_G25_WHEEL, LG4FF_G25_TAG, LG4FF_G25_NAME},
+ [LG4FF_MODE_DFGT_IDX] = {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
+ [LG4FF_MODE_G27_IDX] = {USB_DEVICE_ID_LOGITECH_G27_WHEEL, LG4FF_G27_TAG, LG4FF_G27_NAME}
};
-static const struct lg4ff_native_cmd native_dfp = {
- 1,
- {0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
+/* Multimode wheel identificators */
+static const struct lg4ff_wheel_ident_info lg4ff_dfp_ident_info = {
+ 0xf000,
+ 0x1000,
+ USB_DEVICE_ID_LOGITECH_DFP_WHEEL
+};
+
+static const struct lg4ff_wheel_ident_info lg4ff_g25_ident_info = {
+ 0xff00,
+ 0x1200,
+ USB_DEVICE_ID_LOGITECH_G25_WHEEL
+};
+
+static const struct lg4ff_wheel_ident_info lg4ff_g27_ident_info = {
+ 0xfff0,
+ 0x1230,
+ USB_DEVICE_ID_LOGITECH_G27_WHEEL
};
-static const struct lg4ff_native_cmd native_dfgt = {
+static const struct lg4ff_wheel_ident_info lg4ff_dfgt_ident_info = {
+ 0xff00,
+ 0x1300,
+ USB_DEVICE_ID_LOGITECH_DFGT_WHEEL
+};
+
+/* Multimode wheel identification checklists */
+static const struct lg4ff_wheel_ident_checklist lg4ff_main_checklist = {
+ 4,
+ {&lg4ff_dfgt_ident_info,
+ &lg4ff_g27_ident_info,
+ &lg4ff_g25_ident_info,
+ &lg4ff_dfp_ident_info}
+};
+
+/* Compatibility mode switching commands */
+/* EXT_CMD9 - Understood by G27 and DFGT */
+static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfex = {
2,
- {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
- 0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
+ {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
+ 0xf8, 0x09, 0x00, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DF-EX with detach */
};
-static const struct lg4ff_native_cmd native_g25 = {
- 1,
- {0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
+static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfp = {
+ 2,
+ {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
+ 0xf8, 0x09, 0x01, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFP with detach */
+};
+
+static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g25 = {
+ 2,
+ {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
+ 0xf8, 0x09, 0x02, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G25 with detach */
+};
+
+static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfgt = {
+ 2,
+ {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
+ 0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFGT with detach */
};
-static const struct lg4ff_native_cmd native_g27 = {
+static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g27 = {
2,
- {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
- 0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
+ {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
+ 0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G27 with detach */
};
-static const struct lg4ff_usb_revision lg4ff_revs[] = {
- {DFGT_REV_MAJ, DFGT_REV_MIN, &native_dfgt}, /* Driving Force GT */
- {DFGT_REV_MAJ, DFGT2_REV_MIN, &native_dfgt}, /* Driving Force GT v2 */
- {DFP_REV_MAJ, DFP_REV_MIN, &native_dfp}, /* Driving Force Pro */
- {G25_REV_MAJ, G25_REV_MIN, &native_g25}, /* G25 */
- {G27_REV_MAJ, G27_REV_MIN, &native_g27}, /* G27 */
- {G27_REV_MAJ, G27_2_REV_MIN, &native_g27}, /* G27 v2 */
+/* EXT_CMD1 - Understood by DFP, G25, G27 and DFGT */
+static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext01_dfp = {
+ 1,
+ {0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
+};
+
+/* EXT_CMD16 - Understood by G25 and G27 */
+static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext16_g25 = {
+ 1,
+ {0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
};
/* Recalculates X axis value accordingly to currently selected range */
@@ -396,20 +510,216 @@ static void hid_lg4ff_set_range_dfp(struct hid_device *hid, __u16 range)
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
}
-static void hid_lg4ff_switch_native(struct hid_device *hid, const struct lg4ff_native_cmd *cmd)
+static const struct lg4ff_compat_mode_switch *lg4ff_get_mode_switch_command(const u16 real_product_id, const u16 target_product_id)
+{
+ switch (real_product_id) {
+ case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
+ switch (target_product_id) {
+ case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
+ return &lg4ff_mode_switch_ext01_dfp;
+ /* DFP can only be switched to its native mode */
+ default:
+ return NULL;
+ }
+ break;
+ case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
+ switch (target_product_id) {
+ case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
+ return &lg4ff_mode_switch_ext01_dfp;
+ case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
+ return &lg4ff_mode_switch_ext16_g25;
+ /* G25 can only be switched to DFP mode or its native mode */
+ default:
+ return NULL;
+ }
+ break;
+ case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
+ switch (target_product_id) {
+ case USB_DEVICE_ID_LOGITECH_WHEEL:
+ return &lg4ff_mode_switch_ext09_dfex;
+ case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
+ return &lg4ff_mode_switch_ext09_dfp;
+ case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
+ return &lg4ff_mode_switch_ext09_g25;
+ case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
+ return &lg4ff_mode_switch_ext09_g27;
+ /* G27 can only be switched to DF-EX, DFP, G25 or its native mode */
+ default:
+ return NULL;
+ }
+ break;
+ case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
+ switch (target_product_id) {
+ case USB_DEVICE_ID_LOGITECH_WHEEL:
+ return &lg4ff_mode_switch_ext09_dfex;
+ case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
+ return &lg4ff_mode_switch_ext09_dfp;
+ case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
+ return &lg4ff_mode_switch_ext09_dfgt;
+ /* DFGT can only be switched to DF-EX, DFP or its native mode */
+ default:
+ return NULL;
+ }
+ break;
+ /* No other wheels have multiple modes */
+ default:
+ return NULL;
+ }
+}
+
+static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct lg4ff_compat_mode_switch *s)
{
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
- __u8 i, j;
+ __s32 *value = report->field[0]->value;
+ u8 i;
- j = 0;
- while (j < 7*cmd->cmd_num) {
- for (i = 0; i < 7; i++)
- report->field[0]->value[i] = cmd->cmd[j++];
+ for (i = 0; i < s->cmd_count; i++) {
+ u8 j;
+
+ for (j = 0; j < 7; j++)
+ value[j] = s->cmd[j + (7*i)];
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
}
+ hid_hw_wait(hid);
+ return 0;
+}
+
+static ssize_t lg4ff_alternate_modes_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct hid_device *hid = to_hid_device(dev);
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
+ ssize_t count = 0;
+ int i;
+
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return 0;
+ }
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return 0;
+ }
+
+ if (!entry->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)) {
+ /* 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);
+ 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))
+ count += scnprintf(buf + count, PAGE_SIZE - count, " *\n");
+ else
+ count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
+
+ if (count >= PAGE_SIZE - 1)
+ return count;
+ }
+ }
+
+ return count;
+}
+
+static ssize_t lg4ff_alternate_modes_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct hid_device *hid = to_hid_device(dev);
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
+ const struct lg4ff_compat_mode_switch *s;
+ u16 target_product_id = 0;
+ int i, ret;
+ char *lbuf;
+
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return -EINVAL;
+ }
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return -EINVAL;
+ }
+
+ /* Allow \n at the end of the input parameter */
+ lbuf = kasprintf(GFP_KERNEL, "%s", buf);
+ if (!lbuf)
+ return -ENOMEM;
+
+ i = strlen(lbuf);
+ if (lbuf[i-1] == '\n') {
+ if (i == 1) {
+ kfree(lbuf);
+ return -EINVAL;
+ }
+ lbuf[i-1] = '\0';
+ }
+
+ for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
+ 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 (!strcmp(tag, lbuf)) {
+ if (!mode_product_id)
+ target_product_id = entry->real_product_id;
+ else
+ target_product_id = mode_product_id;
+ break;
+ }
+ }
+ }
+
+ if (i == LG4FF_MODE_MAX_IDX) {
+ hid_info(hid, "Requested mode \"%s\" is not supported by the device\n", lbuf);
+ kfree(lbuf);
+ return -EINVAL;
+ }
+ kfree(lbuf); /* Not needed anymore */
+
+ if (target_product_id == entry->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);
+ 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);
+ return -EINVAL;
+ }
+
+ s = lg4ff_get_mode_switch_command(entry->real_product_id, target_product_id);
+ if (!s) {
+ hid_err(hid, "Invalid target product ID %X\n", target_product_id);
+ return -EINVAL;
+ }
+
+ ret = lg4ff_switch_compatibility_mode(hid, s);
+ return (ret == 0 ? count : ret);
}
+static DEVICE_ATTR(alternate_modes, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_alternate_modes_show, lg4ff_alternate_modes_store);
/* Read current range and display it in terminal */
static ssize_t range_show(struct device *dev, struct device_attribute *attr,
@@ -472,6 +782,41 @@ static ssize_t range_store(struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR_RW(range);
+static ssize_t lg4ff_real_id_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct hid_device *hid = to_hid_device(dev);
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
+ size_t count;
+
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return 0;
+ }
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return 0;
+ }
+
+ if (!entry->real_tag || !entry->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);
+ return count;
+}
+
+static ssize_t lg4ff_real_id_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+{
+ /* Real ID is a read-only value */
+ return -EPERM;
+}
+static DEVICE_ATTR(real_id, S_IRUGO, lg4ff_real_id_show, lg4ff_real_id_store);
+
#ifdef CONFIG_LEDS_CLASS
static void lg4ff_set_leds(struct hid_device *hid, __u8 leds)
{
@@ -555,20 +900,119 @@ static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cde
}
#endif
+static u16 lg4ff_identify_multimode_wheel(struct hid_device *hid, const u16 reported_product_id, const u16 bcdDevice)
+{
+ const struct lg4ff_wheel_ident_checklist *checklist;
+ int i, from_idx, to_idx;
+
+ switch (reported_product_id) {
+ case USB_DEVICE_ID_LOGITECH_WHEEL:
+ case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
+ checklist = &lg4ff_main_checklist;
+ from_idx = 0;
+ to_idx = checklist->count - 1;
+ break;
+ case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
+ checklist = &lg4ff_main_checklist;
+ from_idx = 0;
+ to_idx = checklist->count - 2; /* End identity check at G25 */
+ break;
+ case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
+ checklist = &lg4ff_main_checklist;
+ from_idx = 1; /* Start identity check at G27 */
+ to_idx = checklist->count - 3; /* End identity check at G27 */
+ break;
+ case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
+ checklist = &lg4ff_main_checklist;
+ from_idx = 0;
+ to_idx = checklist->count - 4; /* End identity check at DFGT */
+ break;
+ default:
+ return 0;
+ }
+
+ for (i = from_idx; i <= to_idx; i++) {
+ const u16 mask = checklist->models[i]->mask;
+ const u16 result = checklist->models[i]->result;
+ const u16 real_product_id = checklist->models[i]->real_product_id;
+
+ if ((bcdDevice & mask) == result) {
+ dbg_hid("Found wheel with real PID %X whose reported PID is %X\n", real_product_id, reported_product_id);
+ return real_product_id;
+ }
+ }
+
+ /* No match found. This is either Driving Force or an unknown
+ * wheel model, do not touch it */
+ dbg_hid("Wheel with bcdDevice %X was not recognized as multimode wheel, leaving in its current mode\n", bcdDevice);
+ return 0;
+}
+
+static int lg4ff_handle_multimode_wheel(struct hid_device *hid, u16 *real_product_id, const u16 bcdDevice)
+{
+ const u16 reported_product_id = hid->product;
+ int ret;
+
+ *real_product_id = lg4ff_identify_multimode_wheel(hid, reported_product_id, bcdDevice);
+ /* Probed wheel is not a multimode wheel */
+ if (!*real_product_id) {
+ *real_product_id = reported_product_id;
+ dbg_hid("Wheel is not a multimode wheel\n");
+ return LG4FF_MMODE_NOT_MULTIMODE;
+ }
+
+ /* Switch from "Driving Force" mode to native mode automatically.
+ * Otherwise keep the wheel in its current mode */
+ if (reported_product_id == USB_DEVICE_ID_LOGITECH_WHEEL &&
+ reported_product_id != *real_product_id &&
+ !lg4ff_no_autoswitch) {
+ const struct lg4ff_compat_mode_switch *s = lg4ff_get_mode_switch_command(*real_product_id, *real_product_id);
+
+ if (!s) {
+ hid_err(hid, "Invalid product id %X\n", *real_product_id);
+ return LG4FF_MMODE_NOT_MULTIMODE;
+ }
+
+ ret = lg4ff_switch_compatibility_mode(hid, s);
+ if (ret) {
+ /* Wheel could not have been switched to native mode,
+ * leave it in "Driving Force" mode and continue */
+ hid_err(hid, "Unable to switch wheel mode, errno %d\n", ret);
+ return LG4FF_MMODE_IS_MULTIMODE;
+ }
+ return LG4FF_MMODE_SWITCHED;
+ }
+
+ return LG4FF_MMODE_IS_MULTIMODE;
+}
+
+
int lg4ff_init(struct hid_device *hid)
{
struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
struct input_dev *dev = hidinput->input;
+ const struct usb_device_descriptor *udesc = &(hid_to_usb_dev(hid)->descriptor);
+ const u16 bcdDevice = le16_to_cpu(udesc->bcdDevice);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
- struct usb_device_descriptor *udesc;
int error, i, j;
- __u16 bcdDevice, rev_maj, rev_min;
+ int mmode_ret, mmode_idx = -1;
+ u16 real_product_id;
/* Check that the report looks ok */
if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7))
return -1;
+ /* Check if a multimode wheel has been connected and
+ * handle it appropriately */
+ mmode_ret = lg4ff_handle_multimode_wheel(hid, &real_product_id, bcdDevice);
+
+ /* Wheel has been told to switch to native mode. There is no point in going on
+ * with the initialization as the wheel will do a USB reset when it switches mode
+ */
+ if (mmode_ret == LG4FF_MMODE_SWITCHED)
+ return 0;
+
/* Check what wheel has been connected */
for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) {
if (hid->product == lg4ff_devices[i].product_id) {
@@ -583,25 +1027,15 @@ int lg4ff_init(struct hid_device *hid)
return -1;
}
- /* Attempt to switch wheel to native mode when applicable */
- udesc = &(hid_to_usb_dev(hid)->descriptor);
- if (!udesc) {
- hid_err(hid, "NULL USB device descriptor\n");
- return -1;
- }
- bcdDevice = le16_to_cpu(udesc->bcdDevice);
- rev_maj = bcdDevice >> 8;
- rev_min = bcdDevice & 0xff;
-
- if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_WHEEL) {
- dbg_hid("Generic wheel detected, can it do native?\n");
- dbg_hid("USB revision: %2x.%02x\n", rev_maj, rev_min);
+ if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
+ for (mmode_idx = 0; mmode_idx < ARRAY_SIZE(lg4ff_multimode_wheels); mmode_idx++) {
+ if (real_product_id == lg4ff_multimode_wheels[mmode_idx].product_id)
+ break;
+ }
- for (j = 0; j < ARRAY_SIZE(lg4ff_revs); j++) {
- if (lg4ff_revs[j].rev_maj == rev_maj && lg4ff_revs[j].rev_min == rev_min) {
- hid_lg4ff_switch_native(hid, lg4ff_revs[j].command);
- hid_info(hid, "Switched to native mode\n");
- }
+ 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;
}
}
@@ -630,14 +1064,23 @@ int lg4ff_init(struct hid_device *hid)
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;
+ 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;
+ }
/* Check if autocentering is available and
* set the centering force to zero by default */
if (test_bit(FF_AUTOCENTER, dev->ffbit)) {
- if (rev_maj == FFEX_REV_MAJ && rev_min == FFEX_REV_MIN) /* Formula Force EX expects different autocentering command */
+ /* Formula Force EX expects different autocentering command */
+ if ((bcdDevice >> 8) == LG4FF_FFEX_REV_MAJ &&
+ (bcdDevice & 0xff) == LG4FF_FFEX_REV_MIN)
dev->ff->set_autocenter = hid_lg4ff_set_autocenter_ffex;
else
dev->ff->set_autocenter = hid_lg4ff_set_autocenter_default;
@@ -649,6 +1092,14 @@ int lg4ff_init(struct hid_device *hid)
error = device_create_file(&hid->dev, &dev_attr_range);
if (error)
return error;
+ if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
+ error = device_create_file(&hid->dev, &dev_attr_real_id);
+ if (error)
+ return error;
+ error = device_create_file(&hid->dev, &dev_attr_alternate_modes);
+ if (error)
+ return error;
+ }
dbg_hid("sysfs interface created\n");
/* Set the maximum range to start with */
@@ -711,24 +1162,26 @@ out:
return 0;
}
-
-
int lg4ff_deinit(struct hid_device *hid)
{
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
- device_remove_file(&hid->dev, &dev_attr_range);
-
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Error while deinitializing device, no private driver data.\n");
return -1;
}
entry = drv_data->device_props;
- if (!entry) {
- hid_err(hid, "Error while deinitializing device, no device properties data.\n");
- return -1;
+ 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) {
+ device_remove_file(&hid->dev, &dev_attr_real_id);
+ device_remove_file(&hid->dev, &dev_attr_alternate_modes);
}
#ifdef CONFIG_LEDS_CLASS
@@ -752,6 +1205,7 @@ int lg4ff_deinit(struct hid_device *hid)
/* Deallocate memory */
kfree(entry);
+out:
dbg_hid("Device successfully unregistered\n");
return 0;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.