Add a simple USB keyboard driver for sandbox. It provides a function to 'load' it with input data, which it will then stream through to the normal U-Boot input subsystem. When the input data is exhausted, the keyboard stops providing data. Signed-off-by: Simon Glass <sjg@chromium.org>master
Simon Glass
9 years ago
parent
b70a3fea94
commit
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/*
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* (C) Copyright 2015 Google, Inc |
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* Written by Simon Glass <sjg@chromium.org> |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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#include <dm.h> |
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#include <os.h> |
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#include <scsi.h> |
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#include <usb.h> |
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DECLARE_GLOBAL_DATA_PTR; |
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/*
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* This driver emulates a USB keyboard using the USB HID specification (boot |
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* protocol) |
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*/ |
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enum { |
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SANDBOX_KEYB_EP_IN = 1, /* endpoints */ |
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}; |
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enum cmd_phase { |
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PHASE_START, |
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PHASE_DATA, |
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PHASE_STATUS, |
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}; |
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enum { |
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STRINGID_MANUFACTURER = 1, |
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STRINGID_PRODUCT, |
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STRINGID_SERIAL, |
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STRINGID_COUNT, |
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}; |
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/**
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* struct sandbox_keyb_priv - private state for this driver |
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* |
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*/ |
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struct sandbox_keyb_priv { |
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struct membuff in; |
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}; |
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struct sandbox_keyb_plat { |
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struct usb_string keyb_strings[STRINGID_COUNT]; |
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}; |
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static struct usb_device_descriptor keyb_device_desc = { |
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.bLength = sizeof(keyb_device_desc), |
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.bDescriptorType = USB_DT_DEVICE, |
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.bcdUSB = __constant_cpu_to_le16(0x0100), |
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.bDeviceClass = 0, |
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.bDeviceSubClass = 0, |
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.bDeviceProtocol = 0, |
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.idVendor = __constant_cpu_to_le16(0x1234), |
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.idProduct = __constant_cpu_to_le16(0x5679), |
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.iManufacturer = STRINGID_MANUFACTURER, |
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.iProduct = STRINGID_PRODUCT, |
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.iSerialNumber = STRINGID_SERIAL, |
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.bNumConfigurations = 1, |
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}; |
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static struct usb_config_descriptor keyb_config0 = { |
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.bLength = sizeof(keyb_config0), |
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.bDescriptorType = USB_DT_CONFIG, |
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/* wTotalLength is set up by usb-emul-uclass */ |
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.bNumInterfaces = 2, |
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.bConfigurationValue = 0, |
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.iConfiguration = 0, |
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.bmAttributes = 1 << 7 | 1 << 5, |
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.bMaxPower = 50, |
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}; |
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static struct usb_interface_descriptor keyb_interface0 = { |
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.bLength = sizeof(keyb_interface0), |
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.bDescriptorType = USB_DT_INTERFACE, |
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.bInterfaceNumber = 0, |
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.bAlternateSetting = 0, |
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.bNumEndpoints = 1, |
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.bInterfaceClass = USB_CLASS_HID, |
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.bInterfaceSubClass = USB_SUB_HID_BOOT, |
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.bInterfaceProtocol = USB_PROT_HID_KEYBOARD, |
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.iInterface = 0, |
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}; |
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static struct usb_class_hid_descriptor keyb_report0 = { |
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.bLength = sizeof(keyb_report0), |
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.bDescriptorType = USB_DT_HID, |
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.bcdCDC = 0x101, |
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.bCountryCode = 0, |
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.bNumDescriptors = 1, |
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.bDescriptorType0 = USB_DT_HID_REPORT, |
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.wDescriptorLength0 = 0x3f, |
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}; |
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static struct usb_endpoint_descriptor keyb_endpoint0_in = { |
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.bLength = USB_DT_ENDPOINT_SIZE, |
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.bDescriptorType = USB_DT_ENDPOINT, |
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.bEndpointAddress = SANDBOX_KEYB_EP_IN | USB_ENDPOINT_DIR_MASK, |
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.bmAttributes = USB_ENDPOINT_XFER_BULK | |
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USB_ENDPOINT_XFER_ISOC, |
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.wMaxPacketSize = __constant_cpu_to_le16(8), |
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.bInterval = 0xa, |
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}; |
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static struct usb_interface_descriptor keyb_interface1 = { |
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.bLength = sizeof(keyb_interface1), |
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.bDescriptorType = USB_DT_INTERFACE, |
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.bInterfaceNumber = 1, |
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.bAlternateSetting = 0, |
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.bNumEndpoints = 1, |
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.bInterfaceClass = USB_CLASS_HID, |
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.bInterfaceSubClass = USB_SUB_HID_BOOT, |
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.bInterfaceProtocol = USB_PROT_HID_MOUSE, |
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.iInterface = 0, |
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}; |
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static struct usb_class_hid_descriptor keyb_report1 = { |
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.bLength = sizeof(struct usb_class_hid_descriptor), |
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.bDescriptorType = USB_DT_HID, |
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.bcdCDC = 0x101, |
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.bCountryCode = 0, |
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.bNumDescriptors = 1, |
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.bDescriptorType0 = USB_DT_HID_REPORT, |
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.wDescriptorLength0 = 0x32, |
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}; |
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static struct usb_endpoint_descriptor keyb_endpoint1_in = { |
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.bLength = USB_DT_ENDPOINT_SIZE, |
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.bDescriptorType = USB_DT_ENDPOINT, |
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.bEndpointAddress = SANDBOX_KEYB_EP_IN | USB_ENDPOINT_DIR_MASK, |
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.bmAttributes = USB_ENDPOINT_XFER_BULK | |
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USB_ENDPOINT_XFER_ISOC, |
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.wMaxPacketSize = __constant_cpu_to_le16(8), |
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.bInterval = 0xa, |
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}; |
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static void *keyb_desc_list[] = { |
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&keyb_device_desc, |
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&keyb_config0, |
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&keyb_interface0, |
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&keyb_report0, |
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&keyb_endpoint0_in, |
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&keyb_interface1, |
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&keyb_report1, |
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&keyb_endpoint1_in, |
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NULL, |
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}; |
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int sandbox_usb_keyb_add_string(struct udevice *dev, const char *str) |
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{ |
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struct sandbox_keyb_priv *priv = dev_get_priv(dev); |
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int len, ret; |
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len = strlen(str); |
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ret = membuff_put(&priv->in, str, len); |
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if (ret != len) |
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return -ENOSPC; |
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return 0; |
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} |
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static int sandbox_keyb_control(struct udevice *dev, struct usb_device *udev, |
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unsigned long pipe, void *buff, int len, |
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struct devrequest *setup) |
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{ |
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debug("pipe=%lx\n", pipe); |
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return -EIO; |
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} |
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static int sandbox_keyb_interrupt(struct udevice *dev, struct usb_device *udev, |
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unsigned long pipe, void *buffer, int length, int interval) |
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{ |
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struct sandbox_keyb_priv *priv = dev_get_priv(dev); |
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uint8_t *data = buffer; |
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int ch; |
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memset(data, '\0', length); |
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ch = membuff_getbyte(&priv->in); |
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if (ch != -1) |
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data[2] = 4 + ch - 'a'; |
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return 0; |
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} |
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static int sandbox_keyb_bind(struct udevice *dev) |
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{ |
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struct sandbox_keyb_plat *plat = dev_get_platdata(dev); |
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struct usb_string *fs; |
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fs = plat->keyb_strings; |
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fs[0].id = STRINGID_MANUFACTURER; |
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fs[0].s = "sandbox"; |
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fs[1].id = STRINGID_PRODUCT; |
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fs[1].s = "keyboard"; |
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fs[2].id = STRINGID_SERIAL; |
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fs[2].s = dev->name; |
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return usb_emul_setup_device(dev, PACKET_SIZE_8, plat->keyb_strings, |
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keyb_desc_list); |
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} |
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static int sandbox_keyb_probe(struct udevice *dev) |
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{ |
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struct sandbox_keyb_priv *priv = dev_get_priv(dev); |
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return membuff_new(&priv->in, 256); |
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} |
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static const struct dm_usb_ops sandbox_usb_keyb_ops = { |
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.control = sandbox_keyb_control, |
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.interrupt = sandbox_keyb_interrupt, |
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}; |
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static const struct udevice_id sandbox_usb_keyb_ids[] = { |
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{ .compatible = "sandbox,usb-keyb" }, |
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{ } |
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}; |
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U_BOOT_DRIVER(usb_sandbox_keyb) = { |
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.name = "usb_sandbox_keyb", |
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.id = UCLASS_USB_EMUL, |
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.of_match = sandbox_usb_keyb_ids, |
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.bind = sandbox_keyb_bind, |
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.probe = sandbox_keyb_probe, |
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.ops = &sandbox_usb_keyb_ops, |
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.priv_auto_alloc_size = sizeof(struct sandbox_keyb_priv), |
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.platdata_auto_alloc_size = sizeof(struct sandbox_keyb_plat), |
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}; |
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