1 files changed, 140 insertions, 0 deletions
diff --git a/chip/stm32/usb_hid_keyboard.c b/chip/stm32/usb_hid_keyboard.c
new file mode 100644
index 0000000000..4f9e00c43b
--- /dev/null
+++ b/chip/stm32/usb_hid_keyboard.c
@@ -0,0 +1,140 @@
+/* Copyright 2016 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "clock.h"
+#include "common.h"
+#include "config.h"
+#include "console.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "link_defs.h"
+#include "registers.h"
+#include "task.h"
+#include "timer.h"
+#include "util.h"
+#include "usb_descriptor.h"
+#include "usb_hid.h"
+#include "usb_hid_keyboard.h"
+#include "usb_hid_hw.h"
+
+/* Console output macro */
+#define CPRINTF(format, args...) cprintf(CC_USB, format, ## args)
+
+#define HID_KEYBOARD_REPORT_SIZE  8
+
+/* HID descriptors */
+const struct usb_interface_descriptor USB_IFACE_DESC(USB_IFACE_HID_KEYBOARD) = {
+	.bLength = USB_DT_INTERFACE_SIZE,
+	.bDescriptorType = USB_DT_INTERFACE,
+	.bInterfaceNumber = USB_IFACE_HID_KEYBOARD,
+	.bAlternateSetting = 0,
+	.bNumEndpoints = 1,
+	.bInterfaceClass = USB_CLASS_HID,
+	.bInterfaceSubClass = USB_HID_SUBCLASS_BOOT,
+	.bInterfaceProtocol = USB_HID_PROTOCOL_KEYBOARD,
+	.iInterface = 0,
+};
+const struct usb_endpoint_descriptor USB_EP_DESC(USB_IFACE_HID_KEYBOARD, 81) = {
+	.bLength = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType = USB_DT_ENDPOINT,
+	.bEndpointAddress = 0x80 | USB_EP_HID_KEYBOARD,
+	.bmAttributes = 0x03 /* Interrupt endpoint */,
+	.wMaxPacketSize = HID_KEYBOARD_REPORT_SIZE,
+	.bInterval = 40 /* ms polling interval */
+};
+
+/* HID : Report Descriptor */
+static const uint8_t report_desc[] = {
+	0x05, 0x01, /* Usage Page (Generic Desktop) */
+	0x09, 0x06, /* Usage (Keyboard) */
+	0xA1, 0x01, /* Collection (Application) */
+	0x05, 0x07, /* Usage Page (Key Codes) */
+	0x19, 0xE0, /* Usage Minimum (224) */
+	0x29, 0xE7, /* Usage Maximum (231) */
+	0x15, 0x00, /* Logical Minimum (0) */
+	0x25, 0x01, /* Logical Maximum (1) */
+	0x75, 0x01, /* Report Size (1) */
+	0x95, 0x08, /* Report Count (8) */
+	0x81, 0x02, /* Input (Data, Variable, Absolute), ;Modifier byte */
+
+	0x95, 0x01, /* Report Count (1) */
+	0x75, 0x08, /* Report Size (8) */
+	0x81, 0x01, /* Input (Constant), ;Reserved byte */
+
+	0x95, 0x06, /* Report Count (6) */
+	0x75, 0x08, /* Report Size (8) */
+	0x15, 0x00, /* Logical Minimum (0) */
+	0x25, 0x65, /* Logical Maximum(101) */
+	0x05, 0x07, /* Usage Page (Key Codes) */
+	0x19, 0x00, /* Usage Minimum (0) */
+	0x29, 0x65, /* Usage Maximum (101) */
+	0x81, 0x00, /* Input (Data, Array), ;Key arrays (6 bytes) */
+	0xC0        /* End Collection */
+};
+
+const struct usb_hid_descriptor USB_CUSTOM_DESC(USB_IFACE_HID_KEYBOARD, hid) = {
+	.bLength = 9,
+	.bDescriptorType = USB_HID_DT_HID,
+	.bcdHID = 0x0100,
+	.bCountryCode = 0x00, /* Hardware target country */
+	.bNumDescriptors = 1,
+	.desc = {{
+		.bDescriptorType = USB_HID_DT_REPORT,
+		.wDescriptorLength = sizeof(report_desc)
+	}}
+};
+
+static usb_uint hid_ep_buf[HID_KEYBOARD_REPORT_SIZE / 2] __usb_ram;
+
+void set_keyboard_report(uint64_t rpt)
+{
+	memcpy_to_usbram((void *) usb_sram_addr(hid_ep_buf), &rpt, sizeof(rpt));
+	/* enable TX */
+	STM32_TOGGLE_EP(USB_EP_HID_KEYBOARD, EP_TX_MASK, EP_TX_VALID, 0);
+}
+
+static void hid_keyboard_tx(void)
+{
+	hid_tx(USB_EP_HID_KEYBOARD);
+}
+
+static void hid_keyboard_reset(void)
+{
+	hid_reset(USB_EP_HID_KEYBOARD, hid_ep_buf, HID_KEYBOARD_REPORT_SIZE);
+}
+
+USB_DECLARE_EP(USB_EP_HID_KEYBOARD, hid_keyboard_tx, hid_keyboard_tx,
+	       hid_keyboard_reset);
+
+static int hid_keyboard_iface_request(usb_uint *ep0_buf_rx,
+				      usb_uint *ep0_buf_tx)
+{
+	return hid_iface_request(ep0_buf_rx, ep0_buf_tx,
+				 report_desc, sizeof(report_desc));
+}
+USB_DECLARE_IFACE(USB_IFACE_HID_KEYBOARD, hid_keyboard_iface_request)
+
+static int command_hid_kb(int argc, char **argv)
+{
+	uint8_t keycode = 0x0a; /* 'G' key */
+
+	if (argc >= 2) {
+		char *e;
+
+		keycode = strtoi(argv[1], &e, 16);
+		if (*e)
+			return EC_ERROR_PARAM1;
+	}
+
+	/* press then release the key */
+	set_keyboard_report((uint32_t)keycode << 16);
+	udelay(50000);
+	set_keyboard_report(0x000000);
+
+	return EC_SUCCESS;
+}
+DECLARE_CONSOLE_COMMAND(hid_kb, command_hid_kb,
+			"[<HID keycode>]",
+			"test USB HID driver");