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usb: kbd: support Apple Magic Keyboards (2021)

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Apple USB keyboards (Magic Keyboard from 2021 (product id 0x029c)) carry
the HID keyboard boot protocol on the second interface descriptor.
Probe via vendor and product IDs since the class/subclass/protocol match
uses the first interface descriptor.
Probe the two first interface descriptors for the HID keyboard boot
protocol.

USB configuration descriptor for reference:

| Bus 003 Device 002: ID 05ac:029c Apple, Inc. Magic Keyboard
| Device Descriptor:
|   bLength                18
|   bDescriptorType         1
|   bcdUSB               2.00
|   bDeviceClass            0 [unknown]
|   bDeviceSubClass         0 [unknown]
|   bDeviceProtocol         0
|   bMaxPacketSize0        64
|   idVendor           0x05ac Apple, Inc.
|   idProduct          0x029c Magic Keyboard
|   bcdDevice            3.90
|   iManufacturer           1 Apple Inc.
|   iProduct                2 Magic Keyboard
|   iSerial                 3 ...
|   bNumConfigurations      1
|   Configuration Descriptor:
|     bLength                 9
|     bDescriptorType         2
|     wTotalLength       0x003b
|     bNumInterfaces          2
|     bConfigurationValue     1
|     iConfiguration          4 Keyboard
|     bmAttributes         0xa0
|       (Bus Powered)
|       Remote Wakeup
|     MaxPower              500mA
|     Interface Descriptor:
|       bLength                 9
|       bDescriptorType         4
|       bInterfaceNumber        0
|       bAlternateSetting       0
|       bNumEndpoints           1
|       bInterfaceClass         3 Human Interface Device
|       bInterfaceSubClass      0 [unknown]
|       bInterfaceProtocol      0
|       iInterface              5 Device Management
|         HID Device Descriptor:
|           bLength                 9
|           bDescriptorType        33
|           bcdHID               1.10
|           bCountryCode            0 Not supported
|           bNumDescriptors         1
|           bDescriptorType        34 Report
|           wDescriptorLength      83
|           Report Descriptors:
|             ** UNAVAILABLE **
|       Endpoint Descriptor:
|         bLength                 7
|         bDescriptorType         5
|         bEndpointAddress     0x81  EP 1 IN
|         bmAttributes            3
|           Transfer Type            Interrupt
|           Synch Type               None
|           Usage Type               Data
|         wMaxPacketSize     0x0010  1x 16 bytes
|         bInterval               8
|     Interface Descriptor:
|       bLength                 9
|       bDescriptorType         4
|       bInterfaceNumber        1
|       bAlternateSetting       0
|       bNumEndpoints           1
|       bInterfaceClass         3 Human Interface Device
|       bInterfaceSubClass      1 Boot Interface Subclass
|       bInterfaceProtocol      1 Keyboard
|       iInterface              6 Keyboard / Boot
|         HID Device Descriptor:
|           bLength                 9
|           bDescriptorType        33
|           bcdHID               1.10
|           bCountryCode           13 International (ISO)
|           bNumDescriptors         1
|           bDescriptorType        34 Report
|           wDescriptorLength     207
|           Report Descriptors:
|             ** UNAVAILABLE **
|       Endpoint Descriptor:
|         bLength                 7
|         bDescriptorType         5
|         bEndpointAddress     0x82  EP 2 IN
|         bmAttributes            3
|           Transfer Type            Interrupt
|           Synch Type               None
|           Usage Type               Data
|         wMaxPacketSize     0x0010  1x 16 bytes
|         bInterval               8

Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Janne Grunau <j@jannau.net>
This commit is contained in:
Janne Grunau 2024-04-04 08:25:53 +02:00 committed by Marek Vasut
parent 18f288b8d4
commit 575c68279c
1 changed files with 34 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
common/usb_kbd.c
View File

@ -23,6 +23,14 @@
#include <usb.h>
/*
* USB vendor and product IDs used for quirks.
*/
#define USB_VENDOR_ID_APPLE 0x05ac
#define USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_2021 0x029c
#define USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_FINGERPRINT_2021 0x029a
#define USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_NUMPAD_2021 0x029f
/*
* If overwrite_console returns 1, the stdin, stderr and stdout
* are switched to the serial port, else the settings in the
@ -106,6 +114,8 @@ struct usb_kbd_pdata {
unsigned long last_report;
struct int_queue *intq;
uint32_t ifnum;
uint32_t repeat_delay;
uint32_t usb_in_pointer;
@ -150,8 +160,8 @@ static void usb_kbd_put_queue(struct usb_kbd_pdata *data, u8 c)
*/
static void usb_kbd_setled(struct usb_device *dev)
{
struct usb_interface *iface = &dev->config.if_desc[0];
struct usb_kbd_pdata *data = dev->privptr;
struct usb_interface *iface = &dev->config.if_desc[data->ifnum];
ALLOC_ALIGN_BUFFER(uint32_t, leds, 1, USB_DMA_MINALIGN);
*leds = data->flags & USB_KBD_LEDMASK;
@ -365,7 +375,7 @@ static inline void usb_kbd_poll_for_event(struct usb_device *dev)
#if defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP)
struct usb_interface *iface;
struct usb_kbd_pdata *data = dev->privptr;
iface = &dev->config.if_desc[0];
iface = &dev->config.if_desc[data->ifnum];
usb_get_report(dev, iface->desc.bInterfaceNumber,
1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE);
if (memcmp(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE)) {
@ -509,6 +519,8 @@ static int usb_kbd_probe_dev(struct usb_device *dev, unsigned int ifnum)
data->new = memalign(USB_DMA_MINALIGN,
roundup(USB_KBD_BOOT_REPORT_SIZE, USB_DMA_MINALIGN));
data->ifnum = ifnum;
/* Insert private data into USB device structure */
dev->privptr = data;
@ -561,10 +573,17 @@ static int probe_usb_keyboard(struct usb_device *dev)
{
char *stdinname;
struct stdio_dev usb_kbd_dev;
unsigned int ifnum;
unsigned int max_ifnum = min((unsigned int)USB_MAX_ACTIVE_INTERFACES,
(unsigned int)dev->config.no_of_if);
int error;
/* Try probing the keyboard */
if (usb_kbd_probe_dev(dev, 0) != 1)
for (ifnum = 0; ifnum < max_ifnum; ifnum++) {
if (usb_kbd_probe_dev(dev, ifnum) == 1)
break;
}
if (ifnum >= max_ifnum)
return -ENOENT;
/* Register the keyboard */
@ -731,6 +750,18 @@ static const struct usb_device_id kbd_id_table[] = {
.bInterfaceSubClass = USB_SUB_HID_BOOT,
.bInterfaceProtocol = USB_PROT_HID_KEYBOARD,
},
{
USB_DEVICE(USB_VENDOR_ID_APPLE,
USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_2021),
},
{
USB_DEVICE(USB_VENDOR_ID_APPLE,
USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_FINGERPRINT_2021),
},
{
USB_DEVICE(USB_VENDOR_ID_APPLE,
USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_NUMPAD_2021),
},
{ } /* Terminating entry */
};