diff options
Diffstat (limited to 'chip/stm32/usb-stream.c')
| -rw-r--r-- | chip/stm32/usb-stream.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/chip/stm32/usb-stream.c b/chip/stm32/usb-stream.c deleted file mode 100644 index 7429832f10..0000000000 --- a/chip/stm32/usb-stream.c +++ /dev/null @@ -1,180 +0,0 @@ -/* Copyright 2014 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 "atomic.h" -#include "common.h" -#include "config.h" -#include "link_defs.h" -#include "printf.h" -#include "registers.h" -#include "task.h" -#include "timer.h" -#include "util.h" -#include "usart.h" -#include "usb_hw.h" -#include "usb-stream.h" - -static size_t rx_read(struct usb_stream_config const *config) -{ - uintptr_t address = btable_ep[config->endpoint].rx_addr; - size_t count = btable_ep[config->endpoint].rx_count & RX_COUNT_MASK; - - /* - * Only read the received USB packet if there is enough space in the - * receive queue. - */ - if (count > queue_space(config->producer.queue)) - return 0; - - return queue_add_memcpy(config->producer.queue, - (void *) address, - count, - memcpy_from_usbram); -} - -static size_t tx_write(struct usb_stream_config const *config) -{ - uintptr_t address = btable_ep[config->endpoint].tx_addr; - size_t count = queue_remove_memcpy(config->consumer.queue, - (void *) address, - config->tx_size, - memcpy_to_usbram); - - btable_ep[config->endpoint].tx_count = count; - - return count; -} - -static int tx_valid(struct usb_stream_config const *config) -{ - return (STM32_USB_EP(config->endpoint) & EP_TX_MASK) == EP_TX_VALID; -} - -static int rx_valid(struct usb_stream_config const *config) -{ - return (STM32_USB_EP(config->endpoint) & EP_RX_MASK) == EP_RX_VALID; -} - -static int rx_disabled(struct usb_stream_config const *config) -{ - return config->state->rx_disabled; -} - -static void usb_read(struct producer const *producer, size_t count) -{ - struct usb_stream_config const *config = - DOWNCAST(producer, struct usb_stream_config, producer); - - hook_call_deferred(config->deferred, 0); -} - -static void usb_written(struct consumer const *consumer, size_t count) -{ - struct usb_stream_config const *config = - DOWNCAST(consumer, struct usb_stream_config, consumer); - - hook_call_deferred(config->deferred, 0); -} - -struct producer_ops const usb_stream_producer_ops = { - .read = usb_read, -}; - -struct consumer_ops const usb_stream_consumer_ops = { - .written = usb_written, -}; - -void usb_stream_deferred(struct usb_stream_config const *config) -{ - if (!tx_valid(config) && tx_write(config)) - STM32_TOGGLE_EP(config->endpoint, EP_TX_MASK, EP_TX_VALID, 0); - - if (!rx_valid(config) && !rx_disabled(config) && rx_read(config)) - STM32_TOGGLE_EP(config->endpoint, EP_RX_MASK, EP_RX_VALID, 0); -} - -void usb_stream_tx(struct usb_stream_config const *config) -{ - STM32_TOGGLE_EP(config->endpoint, 0, 0, 0); - - hook_call_deferred(config->deferred, 0); -} - -void usb_stream_rx(struct usb_stream_config const *config) -{ - STM32_TOGGLE_EP(config->endpoint, 0, 0, 0); - - hook_call_deferred(config->deferred, 0); -} - -static usb_uint usb_ep_rx_size(size_t bytes) -{ - if (bytes < 64) - return bytes << 9; - else - return 0x8000 | ((bytes - 32) << 5); -} - -void usb_stream_event(struct usb_stream_config const *config, - enum usb_ep_event evt) -{ - int i; - - if (evt != USB_EVENT_RESET) - return; - - i = config->endpoint; - - btable_ep[i].tx_addr = usb_sram_addr(config->tx_ram); - btable_ep[i].tx_count = 0; - - btable_ep[i].rx_addr = usb_sram_addr(config->rx_ram); - btable_ep[i].rx_count = usb_ep_rx_size(config->rx_size); - - config->state->rx_waiting = 0; - - STM32_USB_EP(i) = ((i << 0) | /* Endpoint Addr*/ - (2 << 4) | /* TX NAK */ - (0 << 9) | /* Bulk EP */ - (rx_disabled(config) ? EP_RX_NAK : EP_RX_VALID)); -} - -int usb_usart_interface(struct usb_stream_config const *config, - struct usart_config const *usart, - int interface, - usb_uint *rx_buf, usb_uint *tx_buf) -{ - struct usb_setup_packet req; - - usb_read_setup_packet(rx_buf, &req); - - if (req.bmRequestType != (USB_DIR_OUT | - USB_TYPE_VENDOR | - USB_RECIP_INTERFACE)) - return -1; - - if (req.wIndex != interface || - req.wLength != 0) - return -1; - - switch (req.bRequest) { - /* Set parity. */ - case USB_USART_SET_PARITY: - usart_set_parity(usart, req.wValue); - break; - case USB_USART_SET_BAUD: - usart_set_baud(usart, req.wValue * 100); - break; - - /* TODO(nsanders): support reading parity. */ - /* TODO(nsanders): support reading baud. */ - default: - return -1; - } - - btable_ep[0].tx_count = 0; - STM32_TOGGLE_EP(0, EP_TX_RX_MASK, EP_TX_RX_VALID, EP_STATUS_OUT); - return 0; -} |