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6f4595ff7a
Rename usb.h to usb_descriptor.h to prevent conflict with a commonly-used libusb header. BUG=chromium:552006 BRANCH=None TEST=`make buildall -j` Change-Id: I6145ce120e1fda41bc5c4d4da0313272e76839c7 Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/311429 Commit-Ready: Shawn N <shawnn@chromium.org> Tested-by: Shawn N <shawnn@chromium.org> Reviewed-by: Alec Berg <alecaberg@chromium.org>
146 lines
3.6 KiB
C
146 lines
3.6 KiB
C
/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "atomic.h"
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#include "common.h"
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#include "config.h"
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#include "link_defs.h"
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#include "printf.h"
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#include "registers.h"
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#include "task.h"
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#include "timer.h"
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#include "util.h"
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#include "usb_descriptor.h"
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#include "usb-stream.h"
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static size_t rx_read(struct usb_stream_config const *config)
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{
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uintptr_t address = btable_ep[config->endpoint].rx_addr;
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size_t count = btable_ep[config->endpoint].rx_count & 0x3ff;
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/*
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* Only read the received USB packet if there is enough space in the
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* receive queue.
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*/
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if (count >= queue_space(config->producer.queue))
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return 0;
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return queue_add_memcpy(config->producer.queue,
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(void *) address,
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count,
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memcpy_from_usbram);
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}
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static size_t tx_write(struct usb_stream_config const *config)
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{
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uintptr_t address = btable_ep[config->endpoint].tx_addr;
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size_t count = queue_remove_memcpy(config->consumer.queue,
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(void *) address,
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config->tx_size,
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memcpy_to_usbram);
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btable_ep[config->endpoint].tx_count = count;
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return count;
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}
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static int tx_valid(struct usb_stream_config const *config)
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{
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return (STM32_USB_EP(config->endpoint) & EP_TX_MASK) == EP_TX_VALID;
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}
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static int rx_valid(struct usb_stream_config const *config)
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{
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return (STM32_USB_EP(config->endpoint) & EP_RX_MASK) == EP_RX_VALID;
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}
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static int rx_disabled(struct usb_stream_config const *config)
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{
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return config->state->rx_disabled;
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}
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static void usb_read(struct producer const *producer, size_t count)
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{
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struct usb_stream_config const *config =
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DOWNCAST(producer, struct usb_stream_config, producer);
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hook_call_deferred(config->deferred, 0);
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}
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static void usb_written(struct consumer const *consumer, size_t count)
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{
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struct usb_stream_config const *config =
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DOWNCAST(consumer, struct usb_stream_config, consumer);
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hook_call_deferred(config->deferred, 0);
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}
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static void usb_flush(struct consumer const *consumer)
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{
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struct usb_stream_config const *config =
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DOWNCAST(consumer, struct usb_stream_config, consumer);
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while (tx_valid(config) || queue_count(consumer->queue))
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;
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}
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struct producer_ops const usb_stream_producer_ops = {
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.read = usb_read,
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};
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struct consumer_ops const usb_stream_consumer_ops = {
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.written = usb_written,
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.flush = usb_flush,
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};
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void usb_stream_deferred(struct usb_stream_config const *config)
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{
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if (!tx_valid(config) && tx_write(config))
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STM32_TOGGLE_EP(config->endpoint, EP_TX_MASK, EP_TX_VALID, 0);
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if (!rx_valid(config) && !rx_disabled(config) && rx_read(config))
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STM32_TOGGLE_EP(config->endpoint, EP_RX_MASK, EP_RX_VALID, 0);
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}
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void usb_stream_tx(struct usb_stream_config const *config)
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{
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STM32_TOGGLE_EP(config->endpoint, 0, 0, 0);
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hook_call_deferred(config->deferred, 0);
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}
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void usb_stream_rx(struct usb_stream_config const *config)
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{
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STM32_TOGGLE_EP(config->endpoint, 0, 0, 0);
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hook_call_deferred(config->deferred, 0);
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}
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static usb_uint usb_ep_rx_size(size_t bytes)
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{
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if (bytes < 64)
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return bytes << 9;
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else
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return 0x8000 | ((bytes - 32) << 5);
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}
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void usb_stream_reset(struct usb_stream_config const *config)
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{
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int i = config->endpoint;
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btable_ep[i].tx_addr = usb_sram_addr(config->tx_ram);
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btable_ep[i].tx_count = 0;
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btable_ep[i].rx_addr = usb_sram_addr(config->rx_ram);
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btable_ep[i].rx_count = usb_ep_rx_size(config->rx_size);
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config->state->rx_waiting = 0;
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STM32_USB_EP(i) = ((i << 0) | /* Endpoint Addr*/
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(2 << 4) | /* TX NAK */
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(0 << 9) | /* Bulk EP */
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(rx_disabled(config) ? EP_RX_NAK : EP_RX_VALID));
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}
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