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-rw-r--r--drivers/hid/hid-lg4ff.c266
1 files changed, 190 insertions, 76 deletions
diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index db0dd9b17e53..190c5e3f46ce 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -32,21 +32,15 @@
#include "hid-lg.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_DONE 0
+#define LG4FF_MMODE_SWITCHED 1
+#define LG4FF_MMODE_NOT_MULTIMODE 2
+
+#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);
@@ -77,6 +71,22 @@ 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[];
+};
+
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},
@@ -88,48 +98,63 @@ 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[];
+/* 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
};
-struct lg4ff_usb_revision {
- const __u16 rev_maj;
- const __u16 rev_min;
- const struct lg4ff_native_cmd *command;
+static const struct lg4ff_wheel_ident_info lg4ff_dfgt_ident_info = {
+ 0xff00,
+ 0x1300,
+ USB_DEVICE_ID_LOGITECH_DFGT_WHEEL
};
-static const struct lg4ff_native_cmd native_dfp = {
+/* 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 */
+static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_dfp = {
1,
{0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
};
-static const struct lg4ff_native_cmd native_dfgt = {
+static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_dfgt = {
2,
{0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
};
-static const struct lg4ff_native_cmd native_g25 = {
+static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_g25 = {
1,
{0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
};
-static const struct lg4ff_native_cmd native_g27 = {
+static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_g27 = {
2,
{0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
};
-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 */
-};
-
/* Recalculates X axis value accordingly to currently selected range */
static __s32 lg4ff_adjust_dfp_x_axis(__s32 value, __u16 range)
{
@@ -396,19 +421,22 @@ 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 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;
+ struct usb_device *usbdev = hid_to_usb_dev(hid);
+ struct usbhid_device *usbhid = hid->driver_data;
+ 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++) {
+ int xferd, ret;
+ u8 data[7];
- hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ memcpy(data, s->cmd + (7*i), 7);
+ ret = usb_interrupt_msg(usbdev, usbhid->urbout->pipe, data, 7, &xferd, USB_CTRL_SET_TIMEOUT);
+ if (ret)
+ return ret;
}
+ return 0;
}
/* Read current range and display it in terminal */
@@ -555,20 +583,129 @@ 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 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) {
+ const struct lg4ff_compat_mode_switch *s;
+
+ switch (*real_product_id) {
+ case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
+ s = &lg4ff_mode_switch_dfp;
+ break;
+ case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
+ s = &lg4ff_mode_switch_g25;
+ break;
+ case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
+ s = &lg4ff_mode_switch_g27;
+ break;
+ case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
+ s = &lg4ff_mode_switch_dfgt;
+ break;
+ default:
+ hid_err(hid, "Invalid product id %X\n", *real_product_id);
+ return LG4FF_MMODE_DONE;
+ }
+
+ 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_DONE;
+ }
+ return LG4FF_MMODE_SWITCHED;
+ }
+
+ return LG4FF_MMODE_DONE;
+}
+
+
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 error, i, j, ret;
+ 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 */
+ 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 (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) {
@@ -583,28 +720,6 @@ 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);
-
- 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");
- }
- }
- }
-
/* Set supported force feedback capabilities */
for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
@@ -637,7 +752,9 @@ int lg4ff_init(struct hid_device *hid)
/* 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;
@@ -711,25 +828,21 @@ 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);
#ifdef CONFIG_LEDS_CLASS
{
@@ -752,6 +865,7 @@ int lg4ff_deinit(struct hid_device *hid)
/* Deallocate memory */
kfree(entry);
+out:
dbg_hid("Device successfully unregistered\n");
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 16:54:33 +0100