diff options
Diffstat (limited to 'tests/usb-serial-rs485/usb_cdcacm.c')
| -rw-r--r-- | tests/usb-serial-rs485/usb_cdcacm.c | 363 |
1 files changed, 0 insertions, 363 deletions
diff --git a/tests/usb-serial-rs485/usb_cdcacm.c b/tests/usb-serial-rs485/usb_cdcacm.c deleted file mode 100644 index 099c4ad..0000000 --- a/tests/usb-serial-rs485/usb_cdcacm.c +++ /dev/null @@ -1,363 +0,0 @@ -/* - * This file is part of the libopencm3 project. - * - * Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz> - * Copyright (C) 2013 Alexandru Gagniuc <mr.nuke.me@gmail.com> - * - * This library is free software: you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public License - * along with this library. If not, see <http://www.gnu.org/licenses/>. - */ -/* - * This package is _meant_ to be platform independent, just a full - * cdc-acm impl, with callbacks - */ - -#include "usb_cdcacm.h" - -#include <stdio.h> -#include <stdlib.h> -#include <libopencm3/usb/usbd.h> -#include <libopencm3/usb/cdc.h> -#include <libopencm3/cm3/scb.h> -// NOTHING ELSE! this file _does_ not know about part specifics! - -#include "syscfg.h" -#include "ringb.h" - -#define ER_DEBUG -#ifdef ER_DEBUG -#define ER_DPRINTF(fmt, ...) \ - do { printf(fmt, ## __VA_ARGS__); } while (0) -#else -#define ER_DPRINTF(fmt, ...) \ - do { } while (0) -#endif - - -static uint8_t usbd_control_buffer[128]; -static usbd_device *acm_dev; - -static const struct usb_device_descriptor dev = { - .bLength = USB_DT_DEVICE_SIZE, - .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = 0x2000, - .bDeviceClass = USB_CLASS_CDC, - .bDeviceSubClass = 0, - .bDeviceProtocol = 0, - .bMaxPacketSize0 = 64, - .idVendor = 0xc03e, - .idProduct = 0xb007, - .bcdDevice = 0x2000, - .iManufacturer = 1, - .iProduct = 2, - .iSerialNumber = 3, - .bNumConfigurations = 1, -}; - -/* - * This notification endpoint isn't implemented. According to CDC spec it's - * optional, but its absence causes a NULL pointer dereference in the - * Linux cdc_acm driver. - */ -static const struct usb_endpoint_descriptor comm_endp[] = {{ - .bLength = USB_DT_ENDPOINT_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bEndpointAddress = 0x83, - .bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT, - .wMaxPacketSize = 16, - .bInterval = 1, -}}; - -static const struct usb_endpoint_descriptor data_endp[] = {{ - .bLength = USB_DT_ENDPOINT_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bEndpointAddress = 0x01, - .bmAttributes = USB_ENDPOINT_ATTR_BULK, - .wMaxPacketSize = 64, - .bInterval = 1, -}, { - .bLength = USB_DT_ENDPOINT_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bEndpointAddress = 0x82, - .bmAttributes = USB_ENDPOINT_ATTR_BULK, - .wMaxPacketSize = 64, - .bInterval = 1, -}}; - -static const struct { - struct usb_cdc_header_descriptor header; - struct usb_cdc_call_management_descriptor call_mgmt; - struct usb_cdc_acm_descriptor acm; - struct usb_cdc_union_descriptor cdc_union; -} __attribute__ ((packed)) cdcacm_functional_descriptors = { - .header = { - .bFunctionLength = sizeof(struct usb_cdc_header_descriptor), - .bDescriptorType = CS_INTERFACE, - .bDescriptorSubtype = USB_CDC_TYPE_HEADER, - .bcdCDC = 0x0110, - }, - .call_mgmt = { - .bFunctionLength = - sizeof(struct usb_cdc_call_management_descriptor), - .bDescriptorType = CS_INTERFACE, - .bDescriptorSubtype = USB_CDC_TYPE_CALL_MANAGEMENT, - .bmCapabilities = 0, - .bDataInterface = 1, - }, - .acm = { - .bFunctionLength = sizeof(struct usb_cdc_acm_descriptor), - .bDescriptorType = CS_INTERFACE, - .bDescriptorSubtype = USB_CDC_TYPE_ACM, - .bmCapabilities = (1 << 1), - }, - .cdc_union = { - .bFunctionLength = sizeof(struct usb_cdc_union_descriptor), - .bDescriptorType = CS_INTERFACE, - .bDescriptorSubtype = USB_CDC_TYPE_UNION, - .bControlInterface = 0, - .bSubordinateInterface0 = 1, - } -}; - -static const struct usb_interface_descriptor comm_iface[] = {{ - .bLength = USB_DT_INTERFACE_SIZE, - .bDescriptorType = USB_DT_INTERFACE, - .bInterfaceNumber = 0, - .bAlternateSetting = 0, - .bNumEndpoints = 1, - .bInterfaceClass = USB_CLASS_CDC, - .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM, - .bInterfaceProtocol = USB_CDC_PROTOCOL_AT, - .iInterface = 0, - - .endpoint = comm_endp, - - .extra = &cdcacm_functional_descriptors, - .extralen = sizeof(cdcacm_functional_descriptors) -}}; - -static const struct usb_interface_descriptor data_iface[] = {{ - .bLength = USB_DT_INTERFACE_SIZE, - .bDescriptorType = USB_DT_INTERFACE, - .bInterfaceNumber = 1, - .bAlternateSetting = 0, - .bNumEndpoints = 2, - .bInterfaceClass = USB_CLASS_DATA, - .bInterfaceSubClass = 0, - .bInterfaceProtocol = 0, - .iInterface = 0, - - .endpoint = data_endp, -}}; - -static const struct usb_interface ifaces[] = {{ - .num_altsetting = 1, - .altsetting = comm_iface, -}, { - .num_altsetting = 1, - .altsetting = data_iface, -}}; - -static const struct usb_config_descriptor config = { - .bLength = USB_DT_CONFIGURATION_SIZE, - .bDescriptorType = USB_DT_CONFIGURATION, - .wTotalLength = 0, - .bNumInterfaces = 2, - .bConfigurationValue = 1, - .iConfiguration = 0, - .bmAttributes = 0x80, - .bMaxPower = 0x32, - - .interface = ifaces, -}; - -static char serial[] = "none"; -static const char *usb_strings[] = { - "libopencm3", - "usb_to_serial_cdcacm", - serial, - "DEMO", -}; - -struct ringb rx_ring; -static uint8_t rx_ring_data[64]; -struct ringb tx_ring; -static uint8_t tx_ring_data[128]; -bool nakked = false; - - -static int cdcacm_control_request(usbd_device *usbd_dev, - struct usb_setup_data *req, uint8_t **buf, - uint16_t *len, - void (**complete) (usbd_device *usbd_dev, - struct usb_setup_data * - req)) -{ - uint8_t dtr, rts; - - (void) complete; - (void) buf; - (void) usbd_dev; - - switch (req->bRequest) { - case USB_CDC_REQ_SET_CONTROL_LINE_STATE: - { - /* - * This Linux cdc_acm driver requires this to be implemented - * even though it's optional in the CDC spec, and we don't - * advertise it in the ACM functional descriptor. - */ - - dtr = (req->wValue & (1 << 0)) ? 1 : 0; - rts = (req->wValue & (1 << 1)) ? 1 : 0; - ER_DPRINTF("CTRLRQ:%d Set Line state: dtr:%d rts: %d\n", req->wIndex, dtr, rts); - - // FIXME - need to get port based on wIndex I believe? - cdcacm_arch_set_line_state(0, dtr, rts); - - return 1; - } - case USB_CDC_REQ_SET_LINE_CODING: - { - struct usb_cdc_line_coding *coding; - - if (*len < sizeof (struct usb_cdc_line_coding)) - return 0; - - coding = (struct usb_cdc_line_coding *) *buf; - ER_DPRINTF("CTRLRQ: line coding: %lu(%u:%u:%u)\n", coding->dwDTERate, - coding->bDataBits, coding->bParityType, coding->bCharFormat); - return glue_set_line_coding_cb(coding->dwDTERate, - coding->bDataBits, - coding->bParityType, - coding->bCharFormat); - } - } - return 0; -} - -static void cdcacm_data_rx_cb(usbd_device *usbd_dev, uint8_t ep) -{ - uint8_t buf[64]; - /* nak right now, we're not sure whether we'll be able to even process this!*/ - usbd_ep_nak_set(usbd_dev, ep, 1); - int len = usbd_ep_read_packet(usbd_dev, ep, buf, 64); - ER_DPRINTF("Hrx%db\n", len); - cdcacm_arch_pin(0, CDCACM_PIN_LED_TX, 1); - cdcacm_arch_pin(0, CDCACM_PIN_RS485DE, 1); - for (int x = 0; x < len; x++) { - if (!ringb_put(&tx_ring, buf[x])) { - // failed to process usb traffic properly. - // should _never_ happen, means we failed to nak in time. - // this is _never_recoverable beyond watchdog reset. - while(1); - } - // look up port to suart mapping which side? - cdcacm_arch_txirq(0, 1); - } - if (ringb_depth(&tx_ring) < 64) { - ER_DPRINTF("ACK\n"); - usbd_ep_nak_set(usbd_dev, ep, 0); - } else { - nakked = true; - } -} - -static void cdcacm_set_config(usbd_device *usbd_dev, uint16_t wValue) -{ - (void) wValue; - - usbd_ep_setup(usbd_dev, 0x01, USB_ENDPOINT_ATTR_BULK, 64, - cdcacm_data_rx_cb); - usbd_ep_setup(usbd_dev, 0x82, USB_ENDPOINT_ATTR_BULK, 64, NULL); - usbd_ep_setup(usbd_dev, 0x83, USB_ENDPOINT_ATTR_INTERRUPT, 16, NULL); - - usbd_register_control_callback(usbd_dev, - USB_REQ_TYPE_CLASS | - USB_REQ_TYPE_INTERFACE, - USB_REQ_TYPE_TYPE | - USB_REQ_TYPE_RECIPIENT, - cdcacm_control_request); -} - -/* FIXME - need to report this! */ -void cdcacm_line_state_changed_cb(uint8_t linemask) -{ - const int size = sizeof (struct usb_cdc_notification) + 2; - uint8_t buf[size]; - - struct usb_cdc_notification *notify = (void *) buf; - notify->bmRequestType = 0xa1; - notify->bNotification = USB_CDC_NOTIFY_SERIAL_STATE; - notify->wValue = 0; - notify->wIndex = 1; - notify->wLength = 2; - uint16_t *data = (void *) &buf[sizeof (struct usb_cdc_notification)]; - *data = linemask; - - while (usbd_ep_write_packet(acm_dev, 0x83, buf, size) == size); -} - - -/* Y0, moron, nothing's stopping rx irqs from happening, have fun when you overflow temp buffer! */ -static void task_drain_rx(struct ringb *r) { - uint8_t zero_copy_is_for_losers[sizeof(rx_ring_data)]; - int zci = 0; - int c = ringb_get(r); - while (c >= 0) { - //trace_send8(STIMULUS_RING_DRAIN, c); - zero_copy_is_for_losers[zci++] = c; - c = ringb_get(r); - } - if (zci) { - //trace_send16(STIMULUS_RING_DRAIN, zci); - ER_DPRINTF("Drx %db\n", zci); - usbd_ep_write_packet(acm_dev, 0x82, zero_copy_is_for_losers, zci); - } -} - - -usbd_device * usb_cdcacm_init(const usbd_driver *driver, const char *userserial) -{ - ringb_init(&rx_ring, rx_ring_data, sizeof(rx_ring_data)); - ringb_init(&tx_ring, tx_ring_data, sizeof(tx_ring_data)); - if (userserial) { - usb_strings[2] = userserial; - } - - acm_dev = usbd_init(driver, &dev, &config, usb_strings, 4, - usbd_control_buffer, sizeof (usbd_control_buffer)); - usbd_register_set_config_callback(acm_dev, cdcacm_set_config); - return acm_dev; -} - - -void usb_cdcacm_poll(usbd_device *usbd_dev) // FIXME -drop to acm_dev internal -{ - // Originally, calling this every 50 times caused some rx character droppage, - // and every 500 times caused _none_. _probably_ needs to be tied to - // a timer and something like the current baud rate and the inter character time - static int i = 0; - if (i++ > 500) { - // hacktastic - if (ringb_depth(&tx_ring) < 64 && nakked) { - usbd_ep_nak_set(usbd_dev, 1, 0); - nakked = false; - } - - task_drain_rx(&rx_ring); - i = 0; - } - - -}
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