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freebsd-nq/sys/dev/usb/controller/at91dci.c
Hans Petter Selasky 5ec70ad261 - Implement fast interrupt handler to save CPU usage. 
- Cleanup some register reads and writes to use existing register
  access macros.
- Ensure code which only applies to the control endpoint is not run
  for other endpoints in the data transfer path.

MFC after:	3 days
2014-08-05 18:48:12 +00:00

2381 lines
52 KiB
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/* $FreeBSD$ */
/*-
* Copyright (c) 2007-2008 Hans Petter Selasky. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* This file contains the driver for the AT91 series USB Device
* Controller
*/
/*
* Thanks to "David Brownell" for helping out regarding the hardware
* endpoint profiles.
*/
/*
* NOTE: The "fifo_bank" is not reset in hardware when the endpoint is
* reset.
*
* NOTE: When the chip detects BUS-reset it will also reset the
* endpoints, Function-address and more.
*/
#ifdef USB_GLOBAL_INCLUDE_FILE
#include USB_GLOBAL_INCLUDE_FILE
#else
#include <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#define USB_DEBUG_VAR at91dcidebug
#include <dev/usb/usb_core.h>
#include <dev/usb/usb_debug.h>
#include <dev/usb/usb_busdma.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/usb_transfer.h>
#include <dev/usb/usb_device.h>
#include <dev/usb/usb_hub.h>
#include <dev/usb/usb_util.h>
#include <dev/usb/usb_controller.h>
#include <dev/usb/usb_bus.h>
#endif /* USB_GLOBAL_INCLUDE_FILE */
#include <dev/usb/controller/at91dci.h>
#define AT9100_DCI_BUS2SC(bus) \
((struct at91dci_softc *)(((uint8_t *)(bus)) - \
((uint8_t *)&(((struct at91dci_softc *)0)->sc_bus))))
#define AT9100_DCI_PC2SC(pc) \
AT9100_DCI_BUS2SC(USB_DMATAG_TO_XROOT((pc)->tag_parent)->bus)
#define AT9100_DCI_THREAD_IRQ \
(AT91_UDP_INT_BUS | AT91_UDP_INT_END_BR | AT91_UDP_INT_RXRSM | AT91_UDP_INT_RXSUSP)
#ifdef USB_DEBUG
static int at91dcidebug = 0;
static SYSCTL_NODE(_hw_usb, OID_AUTO, at91dci, CTLFLAG_RW, 0, "USB at91dci");
SYSCTL_INT(_hw_usb_at91dci, OID_AUTO, debug, CTLFLAG_RW,
&at91dcidebug, 0, "at91dci debug level");
#endif
#define AT9100_DCI_INTR_ENDPT 1
/* prototypes */
static const struct usb_bus_methods at91dci_bus_methods;
static const struct usb_pipe_methods at91dci_device_bulk_methods;
static const struct usb_pipe_methods at91dci_device_ctrl_methods;
static const struct usb_pipe_methods at91dci_device_intr_methods;
static const struct usb_pipe_methods at91dci_device_isoc_fs_methods;
static at91dci_cmd_t at91dci_setup_rx;
static at91dci_cmd_t at91dci_data_rx;
static at91dci_cmd_t at91dci_data_tx;
static at91dci_cmd_t at91dci_data_tx_sync;
static void at91dci_device_done(struct usb_xfer *, usb_error_t);
static void at91dci_do_poll(struct usb_bus *);
static void at91dci_standard_done(struct usb_xfer *);
static void at91dci_root_intr(struct at91dci_softc *sc);
/*
* NOTE: Some of the bits in the CSR register have inverse meaning so
* we need a helper macro when acknowledging events:
*/
#define AT91_CSR_ACK(csr, what) do { \
(csr) &= ~((AT91_UDP_CSR_FORCESTALL| \
AT91_UDP_CSR_TXPKTRDY| \
AT91_UDP_CSR_RXBYTECNT) ^ (what));\
(csr) |= ((AT91_UDP_CSR_RX_DATA_BK0| \
AT91_UDP_CSR_RX_DATA_BK1| \
AT91_UDP_CSR_TXCOMP| \
AT91_UDP_CSR_RXSETUP| \
AT91_UDP_CSR_STALLSENT) ^ (what)); \
} while (0)
/*
* Here is a list of what the chip supports.
* Probably it supports more than listed here!
*/
static const struct usb_hw_ep_profile
at91dci_ep_profile[AT91_UDP_EP_MAX] = {
[0] = {
.max_in_frame_size = 8,
.max_out_frame_size = 8,
.is_simplex = 1,
.support_control = 1,
},
[1] = {
.max_in_frame_size = 64,
.max_out_frame_size = 64,
.is_simplex = 1,
.support_multi_buffer = 1,
.support_bulk = 1,
.support_interrupt = 1,
.support_isochronous = 1,
.support_in = 1,
.support_out = 1,
},
[2] = {
.max_in_frame_size = 64,
.max_out_frame_size = 64,
.is_simplex = 1,
.support_multi_buffer = 1,
.support_bulk = 1,
.support_interrupt = 1,
.support_isochronous = 1,
.support_in = 1,
.support_out = 1,
},
[3] = {
/* can also do BULK */
.max_in_frame_size = 8,
.max_out_frame_size = 8,
.is_simplex = 1,
.support_interrupt = 1,
.support_in = 1,
.support_out = 1,
},
[4] = {
.max_in_frame_size = 256,
.max_out_frame_size = 256,
.is_simplex = 1,
.support_multi_buffer = 1,
.support_bulk = 1,
.support_interrupt = 1,
.support_isochronous = 1,
.support_in = 1,
.support_out = 1,
},
[5] = {
.max_in_frame_size = 256,
.max_out_frame_size = 256,
.is_simplex = 1,
.support_multi_buffer = 1,
.support_bulk = 1,
.support_interrupt = 1,
.support_isochronous = 1,
.support_in = 1,
.support_out = 1,
},
};
static void
at91dci_get_hw_ep_profile(struct usb_device *udev,
const struct usb_hw_ep_profile **ppf, uint8_t ep_addr)
{
if (ep_addr < AT91_UDP_EP_MAX) {
*ppf = (at91dci_ep_profile + ep_addr);
} else {
*ppf = NULL;
}
}
static void
at91dci_clocks_on(struct at91dci_softc *sc)
{
if (sc->sc_flags.clocks_off &&
sc->sc_flags.port_powered) {
DPRINTFN(5, "\n");
if (sc->sc_clocks_on) {
(sc->sc_clocks_on) (sc->sc_clocks_arg);
}
sc->sc_flags.clocks_off = 0;
/* enable Transceiver */
AT91_UDP_WRITE_4(sc, AT91_UDP_TXVC, 0);
}
}
static void
at91dci_clocks_off(struct at91dci_softc *sc)
{
if (!sc->sc_flags.clocks_off) {
DPRINTFN(5, "\n");
/* disable Transceiver */
AT91_UDP_WRITE_4(sc, AT91_UDP_TXVC, AT91_UDP_TXVC_DIS);
if (sc->sc_clocks_off) {
(sc->sc_clocks_off) (sc->sc_clocks_arg);
}
sc->sc_flags.clocks_off = 1;
}
}
static void
at91dci_pull_up(struct at91dci_softc *sc)
{
/* pullup D+, if possible */
if (!sc->sc_flags.d_pulled_up &&
sc->sc_flags.port_powered) {
sc->sc_flags.d_pulled_up = 1;
(sc->sc_pull_up) (sc->sc_pull_arg);
}
}
static void
at91dci_pull_down(struct at91dci_softc *sc)
{
/* pulldown D+, if possible */
if (sc->sc_flags.d_pulled_up) {
sc->sc_flags.d_pulled_up = 0;
(sc->sc_pull_down) (sc->sc_pull_arg);
}
}
static void
at91dci_wakeup_peer(struct at91dci_softc *sc)
{
if (!(sc->sc_flags.status_suspend)) {
return;
}
AT91_UDP_WRITE_4(sc, AT91_UDP_GSTATE, AT91_UDP_GSTATE_ESR);
/* wait 8 milliseconds */
/* Wait for reset to complete. */
usb_pause_mtx(&sc->sc_bus.bus_mtx, hz / 125);
AT91_UDP_WRITE_4(sc, AT91_UDP_GSTATE, 0);
}
static void
at91dci_set_address(struct at91dci_softc *sc, uint8_t addr)
{
DPRINTFN(5, "addr=%d\n", addr);
AT91_UDP_WRITE_4(sc, AT91_UDP_FADDR, addr |
AT91_UDP_FADDR_EN);
}
static uint8_t
at91dci_setup_rx(struct at91dci_softc *sc, struct at91dci_td *td)
{
struct usb_device_request req;
uint32_t csr;
uint32_t temp;
uint16_t count;
/* read out FIFO status */
csr = AT91_UDP_READ_4(sc, td->status_reg);
DPRINTFN(5, "csr=0x%08x rem=%u\n", csr, td->remainder);
temp = csr;
temp &= (AT91_UDP_CSR_RX_DATA_BK0 |
AT91_UDP_CSR_RX_DATA_BK1 |
AT91_UDP_CSR_STALLSENT |
AT91_UDP_CSR_RXSETUP |
AT91_UDP_CSR_TXCOMP);
if (!(csr & AT91_UDP_CSR_RXSETUP)) {
goto not_complete;
}
/* clear did stall */
td->did_stall = 0;
/* get the packet byte count */
count = (csr & AT91_UDP_CSR_RXBYTECNT) >> 16;
/* verify data length */
if (count != td->remainder) {
DPRINTFN(0, "Invalid SETUP packet "
"length, %d bytes\n", count);
goto not_complete;
}
if (count != sizeof(req)) {
DPRINTFN(0, "Unsupported SETUP packet "
"length, %d bytes\n", count);
goto not_complete;
}
/* receive data */
bus_space_read_multi_1(sc->sc_io_tag, sc->sc_io_hdl,
td->fifo_reg, (void *)&req, sizeof(req));
/* copy data into real buffer */
usbd_copy_in(td->pc, 0, &req, sizeof(req));
td->offset = sizeof(req);
td->remainder = 0;
/* sneak peek the set address */
if ((req.bmRequestType == UT_WRITE_DEVICE) &&
(req.bRequest == UR_SET_ADDRESS)) {
sc->sc_dv_addr = req.wValue[0] & 0x7F;
} else {
sc->sc_dv_addr = 0xFF;
}
/* sneak peek the endpoint direction */
if (req.bmRequestType & UE_DIR_IN) {
csr |= AT91_UDP_CSR_DIR;
} else {
csr &= ~AT91_UDP_CSR_DIR;
}
/* write the direction of the control transfer */
AT91_CSR_ACK(csr, temp);
AT91_UDP_WRITE_4(sc, td->status_reg, csr);
return (0); /* complete */
not_complete:
/* abort any ongoing transfer */
if (!td->did_stall) {
DPRINTFN(5, "stalling\n");
temp |= AT91_UDP_CSR_FORCESTALL;
td->did_stall = 1;
}
/* clear interrupts, if any */
if (temp) {
DPRINTFN(5, "clearing 0x%08x\n", temp);
AT91_CSR_ACK(csr, temp);
AT91_UDP_WRITE_4(sc, td->status_reg, csr);
}
return (1); /* not complete */
}
static uint8_t
at91dci_data_rx(struct at91dci_softc *sc, struct at91dci_td *td)
{
struct usb_page_search buf_res;
uint32_t csr;
uint32_t temp;
uint16_t count;
uint8_t to;
uint8_t got_short;
to = 2; /* don't loop forever! */
got_short = 0;
/* check if any of the FIFO banks have data */
repeat:
/* read out FIFO status */
csr = AT91_UDP_READ_4(sc, td->status_reg);
DPRINTFN(5, "csr=0x%08x rem=%u\n", csr, td->remainder);
if (csr & AT91_UDP_CSR_RXSETUP) {
if (td->remainder == 0) {
/*
* We are actually complete and have
* received the next SETUP
*/
DPRINTFN(5, "faking complete\n");
return (0); /* complete */
}
/*
* USB Host Aborted the transfer.
*/
td->error = 1;
return (0); /* complete */
}
/* Make sure that "STALLSENT" gets cleared */
temp = csr;
temp &= AT91_UDP_CSR_STALLSENT;
/* check status */
if (!(csr & (AT91_UDP_CSR_RX_DATA_BK0 |
AT91_UDP_CSR_RX_DATA_BK1))) {
if (temp) {
/* write command */
AT91_CSR_ACK(csr, temp);
AT91_UDP_WRITE_4(sc, td->status_reg, csr);
}
return (1); /* not complete */
}
/* get the packet byte count */
count = (csr & AT91_UDP_CSR_RXBYTECNT) >> 16;
/* verify the packet byte count */
if (count != td->max_packet_size) {
if (count < td->max_packet_size) {
/* we have a short packet */
td->short_pkt = 1;
got_short = 1;
} else {
/* invalid USB packet */
td->error = 1;
return (0); /* we are complete */
}
}
/* verify the packet byte count */
if (count > td->remainder) {
/* invalid USB packet */
td->error = 1;
return (0); /* we are complete */
}
while (count > 0) {
usbd_get_page(td->pc, td->offset, &buf_res);
/* get correct length */
if (buf_res.length > count) {
buf_res.length = count;
}
/* receive data */
bus_space_read_multi_1(sc->sc_io_tag, sc->sc_io_hdl,
td->fifo_reg, buf_res.buffer, buf_res.length);
/* update counters */
count -= buf_res.length;
td->offset += buf_res.length;
td->remainder -= buf_res.length;
}
/* clear status bits */
if (td->support_multi_buffer) {
if (td->fifo_bank) {
td->fifo_bank = 0;
temp |= AT91_UDP_CSR_RX_DATA_BK1;
} else {
td->fifo_bank = 1;
temp |= AT91_UDP_CSR_RX_DATA_BK0;
}
} else {
temp |= (AT91_UDP_CSR_RX_DATA_BK0 |
AT91_UDP_CSR_RX_DATA_BK1);
}
/* write command */
AT91_CSR_ACK(csr, temp);
AT91_UDP_WRITE_4(sc, td->status_reg, csr);
/*
* NOTE: We may have to delay a little bit before
* proceeding after clearing the DATA_BK bits.
*/
/* check if we are complete */
if ((td->remainder == 0) || got_short) {
if (td->short_pkt) {
/* we are complete */
return (0);
}
/* else need to receive a zero length packet */
}
if (--to) {
goto repeat;
}
return (1); /* not complete */
}
static uint8_t
at91dci_data_tx(struct at91dci_softc *sc, struct at91dci_td *td)
{
struct usb_page_search buf_res;
uint32_t csr;
uint32_t temp;
uint16_t count;
uint8_t to;
to = 2; /* don't loop forever! */
repeat:
/* read out FIFO status */
csr = AT91_UDP_READ_4(sc, td->status_reg);
DPRINTFN(5, "csr=0x%08x rem=%u\n", csr, td->remainder);
if (csr & AT91_UDP_CSR_RXSETUP) {
/*
* The current transfer was aborted
* by the USB Host
*/
td->error = 1;
return (0); /* complete */
}
/* Make sure that "STALLSENT" gets cleared */
temp = csr;
temp &= AT91_UDP_CSR_STALLSENT;
if (csr & AT91_UDP_CSR_TXPKTRDY) {
if (temp) {
/* write command */
AT91_CSR_ACK(csr, temp);
AT91_UDP_WRITE_4(sc, td->status_reg, csr);
}
return (1); /* not complete */
} else {
/* clear TXCOMP and set TXPKTRDY */
temp |= (AT91_UDP_CSR_TXCOMP |
AT91_UDP_CSR_TXPKTRDY);
}
count = td->max_packet_size;
if (td->remainder < count) {
/* we have a short packet */
td->short_pkt = 1;
count = td->remainder;
}
while (count > 0) {
usbd_get_page(td->pc, td->offset, &buf_res);
/* get correct length */
if (buf_res.length > count) {
buf_res.length = count;
}
/* transmit data */
bus_space_write_multi_1(sc->sc_io_tag, sc->sc_io_hdl,
td->fifo_reg, buf_res.buffer, buf_res.length);
/* update counters */
count -= buf_res.length;
td->offset += buf_res.length;
td->remainder -= buf_res.length;
}
/* write command */
AT91_CSR_ACK(csr, temp);
AT91_UDP_WRITE_4(sc, td->status_reg, csr);
/* check remainder */
if (td->remainder == 0) {
if (td->short_pkt) {
return (0); /* complete */
}
/* else we need to transmit a short packet */
}
if (--to) {
goto repeat;
}
return (1); /* not complete */
}
static uint8_t
at91dci_data_tx_sync(struct at91dci_softc *sc, struct at91dci_td *td)
{
uint32_t csr;
uint32_t temp;
/* read out FIFO status */
csr = AT91_UDP_READ_4(sc, td->status_reg);
DPRINTFN(5, "csr=0x%08x\n", csr);
if (csr & AT91_UDP_CSR_RXSETUP) {
DPRINTFN(5, "faking complete\n");
/* Race condition */
return (0); /* complete */
}
temp = csr;
temp &= (AT91_UDP_CSR_STALLSENT |
AT91_UDP_CSR_TXCOMP);
/* check status */
if (csr & AT91_UDP_CSR_TXPKTRDY) {
goto not_complete;
}
if (!(csr & AT91_UDP_CSR_TXCOMP)) {
goto not_complete;
}
if (td->status_reg == AT91_UDP_CSR(0) && sc->sc_dv_addr != 0xFF) {
/*
* The AT91 has a special requirement with regard to
* setting the address and that is to write the new
* address before clearing TXCOMP:
*/
at91dci_set_address(sc, sc->sc_dv_addr);
}
/* write command */
AT91_CSR_ACK(csr, temp);
AT91_UDP_WRITE_4(sc, td->status_reg, csr);
return (0); /* complete */
not_complete:
if (temp) {
/* write command */
AT91_CSR_ACK(csr, temp);
AT91_UDP_WRITE_4(sc, td->status_reg, csr);
}
return (1); /* not complete */
}
static void
at91dci_xfer_do_fifo(struct usb_xfer *xfer)
{
struct at91dci_softc *sc = AT9100_DCI_BUS2SC(xfer->xroot->bus);
struct at91dci_td *td;
uint8_t temp;
DPRINTFN(9, "\n");
td = xfer->td_transfer_cache;
if (td == NULL)
return;
while (1) {
if ((td->func) (sc, td)) {
/* operation in progress */
break;
}
if (((void *)td) == xfer->td_transfer_last) {
goto done;
}
if (td->error) {
goto done;
} else if (td->remainder > 0) {
/*
* We had a short transfer. If there is no alternate
* next, stop processing !
*/
if (!td->alt_next) {
goto done;
}
}
/*
* Fetch the next transfer descriptor and transfer
* some flags to the next transfer descriptor
*/
temp = 0;
if (td->fifo_bank)
temp |= 1;
td = td->obj_next;
xfer->td_transfer_cache = td;
if (temp & 1)
td->fifo_bank = 1;
}
return;
done:
temp = (xfer->endpointno & UE_ADDR);
/* update FIFO bank flag and multi buffer */
if (td->fifo_bank) {
sc->sc_ep_flags[temp].fifo_bank = 1;
} else {
sc->sc_ep_flags[temp].fifo_bank = 0;
}
/* compute all actual lengths */
xfer->td_transfer_cache = NULL;
sc->sc_xfer_complete = 1;
}
static uint8_t
at91dci_xfer_do_complete(struct usb_xfer *xfer)
{
struct at91dci_td *td;
DPRINTFN(9, "\n");
td = xfer->td_transfer_cache;
if (td == NULL) {
/* compute all actual lengths */
at91dci_standard_done(xfer);
return(1);
}
return (0);
}
static void
at91dci_interrupt_poll_locked(struct at91dci_softc *sc)
{
struct usb_xfer *xfer;
TAILQ_FOREACH(xfer, &sc->sc_bus.intr_q.head, wait_entry)
at91dci_xfer_do_fifo(xfer);
}
static void
at91dci_interrupt_complete_locked(struct at91dci_softc *sc)
{
struct usb_xfer *xfer;
repeat:
TAILQ_FOREACH(xfer, &sc->sc_bus.intr_q.head, wait_entry) {
if (at91dci_xfer_do_complete(xfer))
goto repeat;
}
}
void
at91dci_vbus_interrupt(struct at91dci_softc *sc, uint8_t is_on)
{
DPRINTFN(5, "vbus = %u\n", is_on);
if (is_on) {
if (!sc->sc_flags.status_vbus) {
sc->sc_flags.status_vbus = 1;
/* complete root HUB interrupt endpoint */
at91dci_root_intr(sc);
}
} else {
if (sc->sc_flags.status_vbus) {
sc->sc_flags.status_vbus = 0;
sc->sc_flags.status_bus_reset = 0;
sc->sc_flags.status_suspend = 0;
sc->sc_flags.change_suspend = 0;
sc->sc_flags.change_connect = 1;
/* complete root HUB interrupt endpoint */
at91dci_root_intr(sc);
}
}
}
int
at91dci_filter_interrupt(void *arg)
{
struct at91dci_softc *sc = arg;
int retval = FILTER_HANDLED;
uint32_t status;
USB_BUS_SPIN_LOCK(&sc->sc_bus);
status = AT91_UDP_READ_4(sc, AT91_UDP_ISR);
status &= AT91_UDP_INT_DEFAULT;
if (status & AT9100_DCI_THREAD_IRQ)
retval = FILTER_SCHEDULE_THREAD;
/* acknowledge interrupts */
AT91_UDP_WRITE_4(sc, AT91_UDP_ICR, status & ~AT9100_DCI_THREAD_IRQ);
/* poll FIFOs, if any */
at91dci_interrupt_poll_locked(sc);
if (sc->sc_xfer_complete != 0)
retval = FILTER_SCHEDULE_THREAD;
USB_BUS_SPIN_UNLOCK(&sc->sc_bus);
return (retval);
}
void
at91dci_interrupt(void *arg)
{
struct at91dci_softc *sc = arg;
uint32_t status;
USB_BUS_LOCK(&sc->sc_bus);
USB_BUS_SPIN_LOCK(&sc->sc_bus);
status = AT91_UDP_READ_4(sc, AT91_UDP_ISR);
status &= AT9100_DCI_THREAD_IRQ;
/* acknowledge interrupts */
AT91_UDP_WRITE_4(sc, AT91_UDP_ICR, status);
/* check for any bus state change interrupts */
if (status & AT91_UDP_INT_BUS) {
DPRINTFN(5, "real bus interrupt 0x%08x\n", status);
if (status & AT91_UDP_INT_END_BR) {
/* set correct state */
sc->sc_flags.status_bus_reset = 1;
sc->sc_flags.status_suspend = 0;
sc->sc_flags.change_suspend = 0;
sc->sc_flags.change_connect = 1;
/* disable resume interrupt */
AT91_UDP_WRITE_4(sc, AT91_UDP_IDR,
AT91_UDP_INT_RXRSM);
/* enable suspend interrupt */
AT91_UDP_WRITE_4(sc, AT91_UDP_IER,
AT91_UDP_INT_RXSUSP);
}
/*
* If RXRSM and RXSUSP is set at the same time we interpret
* that like RESUME. Resume is set when there is at least 3
* milliseconds of inactivity on the USB BUS.
*/
if (status & AT91_UDP_INT_RXRSM) {
if (sc->sc_flags.status_suspend) {
sc->sc_flags.status_suspend = 0;
sc->sc_flags.change_suspend = 1;
/* disable resume interrupt */
AT91_UDP_WRITE_4(sc, AT91_UDP_IDR,
AT91_UDP_INT_RXRSM);
/* enable suspend interrupt */
AT91_UDP_WRITE_4(sc, AT91_UDP_IER,
AT91_UDP_INT_RXSUSP);
}
} else if (status & AT91_UDP_INT_RXSUSP) {
if (!sc->sc_flags.status_suspend) {
sc->sc_flags.status_suspend = 1;
sc->sc_flags.change_suspend = 1;
/* disable suspend interrupt */
AT91_UDP_WRITE_4(sc, AT91_UDP_IDR,
AT91_UDP_INT_RXSUSP);
/* enable resume interrupt */
AT91_UDP_WRITE_4(sc, AT91_UDP_IER,
AT91_UDP_INT_RXRSM);
}
}
/* complete root HUB interrupt endpoint */
at91dci_root_intr(sc);
}
if (sc->sc_xfer_complete != 0) {
sc->sc_xfer_complete = 0;
at91dci_interrupt_complete_locked(sc);
}
USB_BUS_SPIN_UNLOCK(&sc->sc_bus);
USB_BUS_UNLOCK(&sc->sc_bus);
}
static void
at91dci_setup_standard_chain_sub(struct at91dci_std_temp *temp)
{
struct at91dci_td *td;
/* get current Transfer Descriptor */
td = temp->td_next;
temp->td = td;
/* prepare for next TD */
temp->td_next = td->obj_next;
/* fill out the Transfer Descriptor */
td->func = temp->func;
td->pc = temp->pc;
td->offset = temp->offset;
td->remainder = temp->len;
td->fifo_bank = 0;
td->error = 0;
td->did_stall = temp->did_stall;
td->short_pkt = temp->short_pkt;
td->alt_next = temp->setup_alt_next;
}
static void
at91dci_setup_standard_chain(struct usb_xfer *xfer)
{
struct at91dci_std_temp temp;
struct at91dci_softc *sc;
struct at91dci_td *td;
uint32_t x;
uint8_t ep_no;
uint8_t need_sync;
DPRINTFN(9, "addr=%d endpt=%d sumlen=%d speed=%d\n",
xfer->address, UE_GET_ADDR(xfer->endpointno),
xfer->sumlen, usbd_get_speed(xfer->xroot->udev));
temp.max_frame_size = xfer->max_frame_size;
td = xfer->td_start[0];
xfer->td_transfer_first = td;
xfer->td_transfer_cache = td;
/* setup temp */
temp.pc = NULL;
temp.td = NULL;
temp.td_next = xfer->td_start[0];
temp.offset = 0;
temp.setup_alt_next = xfer->flags_int.short_frames_ok ||
xfer->flags_int.isochronous_xfr;
temp.did_stall = !xfer->flags_int.control_stall;
sc = AT9100_DCI_BUS2SC(xfer->xroot->bus);
ep_no = (xfer->endpointno & UE_ADDR);
/* check if we should prepend a setup message */
if (xfer->flags_int.control_xfr) {
if (xfer->flags_int.control_hdr) {
temp.func = &at91dci_setup_rx;
temp.len = xfer->frlengths[0];
temp.pc = xfer->frbuffers + 0;
temp.short_pkt = temp.len ? 1 : 0;
/* check for last frame */
if (xfer->nframes == 1) {
/* no STATUS stage yet, SETUP is last */
if (xfer->flags_int.control_act)
temp.setup_alt_next = 0;
}
at91dci_setup_standard_chain_sub(&temp);
}
x = 1;
} else {
x = 0;
}
if (x != xfer->nframes) {
if (xfer->endpointno & UE_DIR_IN) {
temp.func = &at91dci_data_tx;
need_sync = 1;
} else {
temp.func = &at91dci_data_rx;
need_sync = 0;
}
/* setup "pc" pointer */
temp.pc = xfer->frbuffers + x;
} else {
need_sync = 0;
}
while (x != xfer->nframes) {
/* DATA0 / DATA1 message */
temp.len = xfer->frlengths[x];
x++;
if (x == xfer->nframes) {
if (xfer->flags_int.control_xfr) {
if (xfer->flags_int.control_act) {
temp.setup_alt_next = 0;
}
} else {
temp.setup_alt_next = 0;
}
}
if (temp.len == 0) {
/* make sure that we send an USB packet */
temp.short_pkt = 0;
} else {
/* regular data transfer */
temp.short_pkt = (xfer->flags.force_short_xfer) ? 0 : 1;
}
at91dci_setup_standard_chain_sub(&temp);
if (xfer->flags_int.isochronous_xfr) {
temp.offset += temp.len;
} else {
/* get next Page Cache pointer */
temp.pc = xfer->frbuffers + x;
}
}
/* check for control transfer */
if (xfer->flags_int.control_xfr) {
/* always setup a valid "pc" pointer for status and sync */
temp.pc = xfer->frbuffers + 0;
temp.len = 0;
temp.short_pkt = 0;
temp.setup_alt_next = 0;
/* check if we need to sync */
if (need_sync) {
/* we need a SYNC point after TX */
temp.func = &at91dci_data_tx_sync;
at91dci_setup_standard_chain_sub(&temp);
}
/* check if we should append a status stage */
if (!xfer->flags_int.control_act) {
/*
* Send a DATA1 message and invert the current
* endpoint direction.
*/
if (xfer->endpointno & UE_DIR_IN) {
temp.func = &at91dci_data_rx;
need_sync = 0;
} else {
temp.func = &at91dci_data_tx;
need_sync = 1;
}
at91dci_setup_standard_chain_sub(&temp);
if (need_sync) {
/* we need a SYNC point after TX */
temp.func = &at91dci_data_tx_sync;
at91dci_setup_standard_chain_sub(&temp);
}
}
}
/* must have at least one frame! */
td = temp.td;
xfer->td_transfer_last = td;
/* setup the correct fifo bank */
if (sc->sc_ep_flags[ep_no].fifo_bank) {
td = xfer->td_transfer_first;
td->fifo_bank = 1;
}
}
static void
at91dci_timeout(void *arg)
{
struct usb_xfer *xfer = arg;
DPRINTF("xfer=%p\n", xfer);
USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
/* transfer is transferred */
at91dci_device_done(xfer, USB_ERR_TIMEOUT);
}
static void
at91dci_start_standard_chain(struct usb_xfer *xfer)
{
struct at91dci_softc *sc = AT9100_DCI_BUS2SC(xfer->xroot->bus);
DPRINTFN(9, "\n");
USB_BUS_SPIN_LOCK(&sc->sc_bus);
/* poll one time */
at91dci_xfer_do_fifo(xfer);
if (at91dci_xfer_do_complete(xfer) == 0) {
uint8_t ep_no = xfer->endpointno & UE_ADDR;
/*
* Only enable the endpoint interrupt when we are actually
* waiting for data, hence we are dealing with level
* triggered interrupts !
*/
AT91_UDP_WRITE_4(sc, AT91_UDP_IER, AT91_UDP_INT_EP(ep_no));
DPRINTFN(15, "enable interrupts on endpoint %d\n", ep_no);
/* put transfer on interrupt queue */
usbd_transfer_enqueue(&xfer->xroot->bus->intr_q, xfer);
/* start timeout, if any */
if (xfer->timeout != 0) {
usbd_transfer_timeout_ms(xfer,
&at91dci_timeout, xfer->timeout);
}
}
USB_BUS_SPIN_UNLOCK(&sc->sc_bus);
}
static void
at91dci_root_intr(struct at91dci_softc *sc)
{
DPRINTFN(9, "\n");
USB_BUS_LOCK_ASSERT(&sc->sc_bus, MA_OWNED);
/* set port bit */
sc->sc_hub_idata[0] = 0x02; /* we only have one port */
uhub_root_intr(&sc->sc_bus, sc->sc_hub_idata,
sizeof(sc->sc_hub_idata));
}
static usb_error_t
at91dci_standard_done_sub(struct usb_xfer *xfer)
{
struct at91dci_td *td;
uint32_t len;
uint8_t error;
DPRINTFN(9, "\n");
td = xfer->td_transfer_cache;
do {
len = td->remainder;
if (xfer->aframes != xfer->nframes) {
/*
* Verify the length and subtract
* the remainder from "frlengths[]":
*/
if (len > xfer->frlengths[xfer->aframes]) {
td->error = 1;
} else {
xfer->frlengths[xfer->aframes] -= len;
}
}
/* Check for transfer error */
if (td->error) {
/* the transfer is finished */
error = 1;
td = NULL;
break;
}
/* Check for short transfer */
if (len > 0) {
if (xfer->flags_int.short_frames_ok ||
xfer->flags_int.isochronous_xfr) {
/* follow alt next */
if (td->alt_next) {
td = td->obj_next;
} else {
td = NULL;
}
} else {
/* the transfer is finished */
td = NULL;
}
error = 0;
break;
}
td = td->obj_next;
/* this USB frame is complete */
error = 0;
break;
} while (0);
/* update transfer cache */
xfer->td_transfer_cache = td;
return (error ?
USB_ERR_STALLED : USB_ERR_NORMAL_COMPLETION);
}
static void
at91dci_standard_done(struct usb_xfer *xfer)
{
usb_error_t err = 0;
DPRINTFN(13, "xfer=%p endpoint=%p transfer done\n",
xfer, xfer->endpoint);
/* reset scanner */
xfer->td_transfer_cache = xfer->td_transfer_first;
if (xfer->flags_int.control_xfr) {
if (xfer->flags_int.control_hdr) {
err = at91dci_standard_done_sub(xfer);
}
xfer->aframes = 1;
if (xfer->td_transfer_cache == NULL) {
goto done;
}
}
while (xfer->aframes != xfer->nframes) {
err = at91dci_standard_done_sub(xfer);
xfer->aframes++;
if (xfer->td_transfer_cache == NULL) {
goto done;
}
}
if (xfer->flags_int.control_xfr &&
!xfer->flags_int.control_act) {
err = at91dci_standard_done_sub(xfer);
}
done:
at91dci_device_done(xfer, err);
}
/*------------------------------------------------------------------------*
* at91dci_device_done
*
* NOTE: this function can be called more than one time on the
* same USB transfer!
*------------------------------------------------------------------------*/
static void
at91dci_device_done(struct usb_xfer *xfer, usb_error_t error)
{
struct at91dci_softc *sc = AT9100_DCI_BUS2SC(xfer->xroot->bus);
uint8_t ep_no;
USB_BUS_LOCK_ASSERT(&sc->sc_bus, MA_OWNED);
DPRINTFN(2, "xfer=%p, endpoint=%p, error=%d\n",
xfer, xfer->endpoint, error);
USB_BUS_SPIN_LOCK(&sc->sc_bus);
if (xfer->flags_int.usb_mode == USB_MODE_DEVICE) {
ep_no = (xfer->endpointno & UE_ADDR);
/* disable endpoint interrupt */
AT91_UDP_WRITE_4(sc, AT91_UDP_IDR, AT91_UDP_INT_EP(ep_no));
DPRINTFN(15, "disable interrupts on endpoint %d\n", ep_no);
}
/* dequeue transfer and start next transfer */
usbd_transfer_done(xfer, error);
USB_BUS_SPIN_UNLOCK(&sc->sc_bus);
}
static void
at91dci_xfer_stall(struct usb_xfer *xfer)
{
at91dci_device_done(xfer, USB_ERR_STALLED);
}
static void
at91dci_set_stall(struct usb_device *udev,
struct usb_endpoint *ep, uint8_t *did_stall)
{
struct at91dci_softc *sc;
uint32_t csr_val;
uint8_t csr_reg;
USB_BUS_LOCK_ASSERT(udev->bus, MA_OWNED);
DPRINTFN(5, "endpoint=%p\n", ep);
/* set FORCESTALL */
sc = AT9100_DCI_BUS2SC(udev->bus);
USB_BUS_SPIN_LOCK(&sc->sc_bus);
csr_reg = (ep->edesc->bEndpointAddress & UE_ADDR);
csr_reg = AT91_UDP_CSR(csr_reg);
csr_val = AT91_UDP_READ_4(sc, csr_reg);
AT91_CSR_ACK(csr_val, AT91_UDP_CSR_FORCESTALL);
AT91_UDP_WRITE_4(sc, csr_reg, csr_val);
USB_BUS_SPIN_UNLOCK(&sc->sc_bus);
}
static void
at91dci_clear_stall_sub(struct at91dci_softc *sc, uint8_t ep_no,
uint8_t ep_type, uint8_t ep_dir)
{
const struct usb_hw_ep_profile *pf;
uint32_t csr_val;
uint32_t temp;
uint8_t csr_reg;
uint8_t to;
if (ep_type == UE_CONTROL) {
/* clearing stall is not needed */
return;
}
USB_BUS_SPIN_LOCK(&sc->sc_bus);
/* compute CSR register offset */
csr_reg = AT91_UDP_CSR(ep_no);
/* compute default CSR value */
csr_val = 0;
AT91_CSR_ACK(csr_val, 0);
/* disable endpoint */
AT91_UDP_WRITE_4(sc, csr_reg, csr_val);
/* get endpoint profile */
at91dci_get_hw_ep_profile(NULL, &pf, ep_no);
/* reset FIFO */
AT91_UDP_WRITE_4(sc, AT91_UDP_RST, AT91_UDP_RST_EP(ep_no));
AT91_UDP_WRITE_4(sc, AT91_UDP_RST, 0);
/*
* NOTE: One would assume that a FIFO reset would release the
* FIFO banks aswell, but it doesn't! We have to do this
* manually!
*/
/* release FIFO banks, if any */
for (to = 0; to != 2; to++) {
/* get csr value */
csr_val = AT91_UDP_READ_4(sc, csr_reg);
if (csr_val & (AT91_UDP_CSR_RX_DATA_BK0 |
AT91_UDP_CSR_RX_DATA_BK1)) {
/* clear status bits */
if (pf->support_multi_buffer) {
if (sc->sc_ep_flags[ep_no].fifo_bank) {
sc->sc_ep_flags[ep_no].fifo_bank = 0;
temp = AT91_UDP_CSR_RX_DATA_BK1;
} else {
sc->sc_ep_flags[ep_no].fifo_bank = 1;
temp = AT91_UDP_CSR_RX_DATA_BK0;
}
} else {
temp = (AT91_UDP_CSR_RX_DATA_BK0 |
AT91_UDP_CSR_RX_DATA_BK1);
}
} else {
temp = 0;
}
/* clear FORCESTALL */
temp |= AT91_UDP_CSR_STALLSENT;
AT91_CSR_ACK(csr_val, temp);
AT91_UDP_WRITE_4(sc, csr_reg, csr_val);
}
/* compute default CSR value */
csr_val = 0;
AT91_CSR_ACK(csr_val, 0);
/* enable endpoint */
csr_val &= ~AT91_UDP_CSR_ET_MASK;
csr_val |= AT91_UDP_CSR_EPEDS;
if (ep_type == UE_CONTROL) {
csr_val |= AT91_UDP_CSR_ET_CTRL;
} else {
if (ep_type == UE_BULK) {
csr_val |= AT91_UDP_CSR_ET_BULK;
} else if (ep_type == UE_INTERRUPT) {
csr_val |= AT91_UDP_CSR_ET_INT;
} else {
csr_val |= AT91_UDP_CSR_ET_ISO;
}
if (ep_dir & UE_DIR_IN) {
csr_val |= AT91_UDP_CSR_ET_DIR_IN;
}
}
/* enable endpoint */
AT91_UDP_WRITE_4(sc, AT91_UDP_CSR(ep_no), csr_val);
USB_BUS_SPIN_UNLOCK(&sc->sc_bus);
}
static void
at91dci_clear_stall(struct usb_device *udev, struct usb_endpoint *ep)
{
struct at91dci_softc *sc;
struct usb_endpoint_descriptor *ed;
DPRINTFN(5, "endpoint=%p\n", ep);
USB_BUS_LOCK_ASSERT(udev->bus, MA_OWNED);
/* check mode */
if (udev->flags.usb_mode != USB_MODE_DEVICE) {
/* not supported */
return;
}
/* get softc */
sc = AT9100_DCI_BUS2SC(udev->bus);
/* get endpoint descriptor */
ed = ep->edesc;
/* reset endpoint */
at91dci_clear_stall_sub(sc,
(ed->bEndpointAddress & UE_ADDR),
(ed->bmAttributes & UE_XFERTYPE),
(ed->bEndpointAddress & (UE_DIR_IN | UE_DIR_OUT)));
}
usb_error_t
at91dci_init(struct at91dci_softc *sc)
{
uint32_t csr_val;
uint8_t n;
DPRINTF("start\n");
/* set up the bus structure */
sc->sc_bus.usbrev = USB_REV_1_1;
sc->sc_bus.methods = &at91dci_bus_methods;
USB_BUS_LOCK(&sc->sc_bus);
/* turn on clocks */
if (sc->sc_clocks_on) {
(sc->sc_clocks_on) (sc->sc_clocks_arg);
}
/* wait a little for things to stabilise */
usb_pause_mtx(&sc->sc_bus.bus_mtx, hz / 1000);
/* disable and clear all interrupts */
AT91_UDP_WRITE_4(sc, AT91_UDP_IDR, 0xFFFFFFFF);
AT91_UDP_WRITE_4(sc, AT91_UDP_ICR, 0xFFFFFFFF);
/* compute default CSR value */
csr_val = 0;
AT91_CSR_ACK(csr_val, 0);
/* disable all endpoints */
for (n = 0; n != AT91_UDP_EP_MAX; n++) {
/* disable endpoint */
AT91_UDP_WRITE_4(sc, AT91_UDP_CSR(n), csr_val);
}
/* enable the control endpoint */
AT91_CSR_ACK(csr_val, AT91_UDP_CSR_ET_CTRL |
AT91_UDP_CSR_EPEDS);
/* write to FIFO control register */
AT91_UDP_WRITE_4(sc, AT91_UDP_CSR(0), csr_val);
/* enable the interrupts we want */
AT91_UDP_WRITE_4(sc, AT91_UDP_IER, AT91_UDP_INT_BUS);
/* turn off clocks */
at91dci_clocks_off(sc);
USB_BUS_UNLOCK(&sc->sc_bus);
/* catch any lost interrupts */
at91dci_do_poll(&sc->sc_bus);
return (0); /* success */
}
void
at91dci_uninit(struct at91dci_softc *sc)
{
USB_BUS_LOCK(&sc->sc_bus);
/* disable and clear all interrupts */
AT91_UDP_WRITE_4(sc, AT91_UDP_IDR, 0xFFFFFFFF);
AT91_UDP_WRITE_4(sc, AT91_UDP_ICR, 0xFFFFFFFF);
sc->sc_flags.port_powered = 0;
sc->sc_flags.status_vbus = 0;
sc->sc_flags.status_bus_reset = 0;
sc->sc_flags.status_suspend = 0;
sc->sc_flags.change_suspend = 0;
sc->sc_flags.change_connect = 1;
at91dci_pull_down(sc);
at91dci_clocks_off(sc);
USB_BUS_UNLOCK(&sc->sc_bus);
}
static void
at91dci_suspend(struct at91dci_softc *sc)
{
/* TODO */
}
static void
at91dci_resume(struct at91dci_softc *sc)
{
/* TODO */
}
static void
at91dci_do_poll(struct usb_bus *bus)
{
struct at91dci_softc *sc = AT9100_DCI_BUS2SC(bus);
USB_BUS_LOCK(&sc->sc_bus);
USB_BUS_SPIN_LOCK(&sc->sc_bus);
at91dci_interrupt_poll_locked(sc);
at91dci_interrupt_complete_locked(sc);
USB_BUS_SPIN_UNLOCK(&sc->sc_bus);
USB_BUS_UNLOCK(&sc->sc_bus);
}
/*------------------------------------------------------------------------*
* at91dci bulk support
*------------------------------------------------------------------------*/
static void
at91dci_device_bulk_open(struct usb_xfer *xfer)
{
return;
}
static void
at91dci_device_bulk_close(struct usb_xfer *xfer)
{
at91dci_device_done(xfer, USB_ERR_CANCELLED);
}
static void
at91dci_device_bulk_enter(struct usb_xfer *xfer)
{
return;
}
static void
at91dci_device_bulk_start(struct usb_xfer *xfer)
{
/* setup TDs */
at91dci_setup_standard_chain(xfer);
at91dci_start_standard_chain(xfer);
}
static const struct usb_pipe_methods at91dci_device_bulk_methods =
{
.open = at91dci_device_bulk_open,
.close = at91dci_device_bulk_close,
.enter = at91dci_device_bulk_enter,
.start = at91dci_device_bulk_start,
};
/*------------------------------------------------------------------------*
* at91dci control support
*------------------------------------------------------------------------*/
static void
at91dci_device_ctrl_open(struct usb_xfer *xfer)
{
return;
}
static void
at91dci_device_ctrl_close(struct usb_xfer *xfer)
{
at91dci_device_done(xfer, USB_ERR_CANCELLED);
}
static void
at91dci_device_ctrl_enter(struct usb_xfer *xfer)
{
return;
}
static void
at91dci_device_ctrl_start(struct usb_xfer *xfer)
{
/* setup TDs */
at91dci_setup_standard_chain(xfer);
at91dci_start_standard_chain(xfer);
}
static const struct usb_pipe_methods at91dci_device_ctrl_methods =
{
.open = at91dci_device_ctrl_open,
.close = at91dci_device_ctrl_close,
.enter = at91dci_device_ctrl_enter,
.start = at91dci_device_ctrl_start,
};
/*------------------------------------------------------------------------*
* at91dci interrupt support
*------------------------------------------------------------------------*/
static void
at91dci_device_intr_open(struct usb_xfer *xfer)
{
return;
}
static void
at91dci_device_intr_close(struct usb_xfer *xfer)
{
at91dci_device_done(xfer, USB_ERR_CANCELLED);
}
static void
at91dci_device_intr_enter(struct usb_xfer *xfer)
{
return;
}
static void
at91dci_device_intr_start(struct usb_xfer *xfer)
{
/* setup TDs */
at91dci_setup_standard_chain(xfer);
at91dci_start_standard_chain(xfer);
}
static const struct usb_pipe_methods at91dci_device_intr_methods =
{
.open = at91dci_device_intr_open,
.close = at91dci_device_intr_close,
.enter = at91dci_device_intr_enter,
.start = at91dci_device_intr_start,
};
/*------------------------------------------------------------------------*
* at91dci full speed isochronous support
*------------------------------------------------------------------------*/
static void
at91dci_device_isoc_fs_open(struct usb_xfer *xfer)
{
return;
}
static void
at91dci_device_isoc_fs_close(struct usb_xfer *xfer)
{
at91dci_device_done(xfer, USB_ERR_CANCELLED);
}
static void
at91dci_device_isoc_fs_enter(struct usb_xfer *xfer)
{
struct at91dci_softc *sc = AT9100_DCI_BUS2SC(xfer->xroot->bus);
uint32_t temp;
uint32_t nframes;
DPRINTFN(6, "xfer=%p next=%d nframes=%d\n",
xfer, xfer->endpoint->isoc_next, xfer->nframes);
/* get the current frame index */
nframes = AT91_UDP_READ_4(sc, AT91_UDP_FRM);
/*
* check if the frame index is within the window where the frames
* will be inserted
*/
temp = (nframes - xfer->endpoint->isoc_next) & AT91_UDP_FRM_MASK;
if ((xfer->endpoint->is_synced == 0) ||
(temp < xfer->nframes)) {
/*
* If there is data underflow or the endpoint queue is
* empty we schedule the transfer a few frames ahead
* of the current frame position. Else two isochronous
* transfers might overlap.
*/
xfer->endpoint->isoc_next = (nframes + 3) & AT91_UDP_FRM_MASK;
xfer->endpoint->is_synced = 1;
DPRINTFN(3, "start next=%d\n", xfer->endpoint->isoc_next);
}
/*
* compute how many milliseconds the insertion is ahead of the
* current frame position:
*/
temp = (xfer->endpoint->isoc_next - nframes) & AT91_UDP_FRM_MASK;
/*
* pre-compute when the isochronous transfer will be finished:
*/
xfer->isoc_time_complete =
usb_isoc_time_expand(&sc->sc_bus, nframes) + temp +
xfer->nframes;
/* compute frame number for next insertion */
xfer->endpoint->isoc_next += xfer->nframes;
/* setup TDs */
at91dci_setup_standard_chain(xfer);
}
static void
at91dci_device_isoc_fs_start(struct usb_xfer *xfer)
{
/* start TD chain */
at91dci_start_standard_chain(xfer);
}
static const struct usb_pipe_methods at91dci_device_isoc_fs_methods =
{
.open = at91dci_device_isoc_fs_open,
.close = at91dci_device_isoc_fs_close,
.enter = at91dci_device_isoc_fs_enter,
.start = at91dci_device_isoc_fs_start,
};
/*------------------------------------------------------------------------*
* at91dci root control support
*------------------------------------------------------------------------*
* Simulate a hardware HUB by handling all the necessary requests.
*------------------------------------------------------------------------*/
static const struct usb_device_descriptor at91dci_devd = {
.bLength = sizeof(struct usb_device_descriptor),
.bDescriptorType = UDESC_DEVICE,
.bcdUSB = {0x00, 0x02},
.bDeviceClass = UDCLASS_HUB,
.bDeviceSubClass = UDSUBCLASS_HUB,
.bDeviceProtocol = UDPROTO_FSHUB,
.bMaxPacketSize = 64,
.bcdDevice = {0x00, 0x01},
.iManufacturer = 1,
.iProduct = 2,
.bNumConfigurations = 1,
};
static const struct at91dci_config_desc at91dci_confd = {
.confd = {
.bLength = sizeof(struct usb_config_descriptor),
.bDescriptorType = UDESC_CONFIG,
.wTotalLength[0] = sizeof(at91dci_confd),
.bNumInterface = 1,
.bConfigurationValue = 1,
.iConfiguration = 0,
.bmAttributes = UC_SELF_POWERED,
.bMaxPower = 0,
},
.ifcd = {
.bLength = sizeof(struct usb_interface_descriptor),
.bDescriptorType = UDESC_INTERFACE,
.bNumEndpoints = 1,
.bInterfaceClass = UICLASS_HUB,
.bInterfaceSubClass = UISUBCLASS_HUB,
.bInterfaceProtocol = 0,
},
.endpd = {
.bLength = sizeof(struct usb_endpoint_descriptor),
.bDescriptorType = UDESC_ENDPOINT,
.bEndpointAddress = (UE_DIR_IN | AT9100_DCI_INTR_ENDPT),
.bmAttributes = UE_INTERRUPT,
.wMaxPacketSize[0] = 8,
.bInterval = 255,
},
};
#define HSETW(ptr, val) ptr = { (uint8_t)(val), (uint8_t)((val) >> 8) }
static const struct usb_hub_descriptor_min at91dci_hubd = {
.bDescLength = sizeof(at91dci_hubd),
.bDescriptorType = UDESC_HUB,
.bNbrPorts = 1,
HSETW(.wHubCharacteristics, (UHD_PWR_NO_SWITCH | UHD_OC_INDIVIDUAL)),
.bPwrOn2PwrGood = 50,
.bHubContrCurrent = 0,
.DeviceRemovable = {0}, /* port is removable */
};
#define STRING_VENDOR \
"A\0T\0M\0E\0L"
#define STRING_PRODUCT \
"D\0C\0I\0 \0R\0o\0o\0t\0 \0H\0U\0B"
USB_MAKE_STRING_DESC(STRING_VENDOR, at91dci_vendor);
USB_MAKE_STRING_DESC(STRING_PRODUCT, at91dci_product);
static usb_error_t
at91dci_roothub_exec(struct usb_device *udev,
struct usb_device_request *req, const void **pptr, uint16_t *plength)
{
struct at91dci_softc *sc = AT9100_DCI_BUS2SC(udev->bus);
const void *ptr;
uint16_t len;
uint16_t value;
uint16_t index;
usb_error_t err;
USB_BUS_LOCK_ASSERT(&sc->sc_bus, MA_OWNED);
/* buffer reset */
ptr = (const void *)&sc->sc_hub_temp;
len = 0;
err = 0;
value = UGETW(req->wValue);
index = UGETW(req->wIndex);
/* demultiplex the control request */
switch (req->bmRequestType) {
case UT_READ_DEVICE:
switch (req->bRequest) {
case UR_GET_DESCRIPTOR:
goto tr_handle_get_descriptor;
case UR_GET_CONFIG:
goto tr_handle_get_config;
case UR_GET_STATUS:
goto tr_handle_get_status;
default:
goto tr_stalled;
}
break;
case UT_WRITE_DEVICE:
switch (req->bRequest) {
case UR_SET_ADDRESS:
goto tr_handle_set_address;
case UR_SET_CONFIG:
goto tr_handle_set_config;
case UR_CLEAR_FEATURE:
goto tr_valid; /* nop */
case UR_SET_DESCRIPTOR:
goto tr_valid; /* nop */
case UR_SET_FEATURE:
default:
goto tr_stalled;
}
break;
case UT_WRITE_ENDPOINT:
switch (req->bRequest) {
case UR_CLEAR_FEATURE:
switch (UGETW(req->wValue)) {
case UF_ENDPOINT_HALT:
goto tr_handle_clear_halt;
case UF_DEVICE_REMOTE_WAKEUP:
goto tr_handle_clear_wakeup;
default:
goto tr_stalled;
}
break;
case UR_SET_FEATURE:
switch (UGETW(req->wValue)) {
case UF_ENDPOINT_HALT:
goto tr_handle_set_halt;
case UF_DEVICE_REMOTE_WAKEUP:
goto tr_handle_set_wakeup;
default:
goto tr_stalled;
}
break;
case UR_SYNCH_FRAME:
goto tr_valid; /* nop */
default:
goto tr_stalled;
}
break;
case UT_READ_ENDPOINT:
switch (req->bRequest) {
case UR_GET_STATUS:
goto tr_handle_get_ep_status;
default:
goto tr_stalled;
}
break;
case UT_WRITE_INTERFACE:
switch (req->bRequest) {
case UR_SET_INTERFACE:
goto tr_handle_set_interface;
case UR_CLEAR_FEATURE:
goto tr_valid; /* nop */
case UR_SET_FEATURE:
default:
goto tr_stalled;
}
break;
case UT_READ_INTERFACE:
switch (req->bRequest) {
case UR_GET_INTERFACE:
goto tr_handle_get_interface;
case UR_GET_STATUS:
goto tr_handle_get_iface_status;
default:
goto tr_stalled;
}
break;
case UT_WRITE_CLASS_INTERFACE:
case UT_WRITE_VENDOR_INTERFACE:
/* XXX forward */
break;
case UT_READ_CLASS_INTERFACE:
case UT_READ_VENDOR_INTERFACE:
/* XXX forward */
break;
case UT_WRITE_CLASS_DEVICE:
switch (req->bRequest) {
case UR_CLEAR_FEATURE:
goto tr_valid;
case UR_SET_DESCRIPTOR:
case UR_SET_FEATURE:
break;
default:
goto tr_stalled;
}
break;
case UT_WRITE_CLASS_OTHER:
switch (req->bRequest) {
case UR_CLEAR_FEATURE:
goto tr_handle_clear_port_feature;
case UR_SET_FEATURE:
goto tr_handle_set_port_feature;
case UR_CLEAR_TT_BUFFER:
case UR_RESET_TT:
case UR_STOP_TT:
goto tr_valid;
default:
goto tr_stalled;
}
break;
case UT_READ_CLASS_OTHER:
switch (req->bRequest) {
case UR_GET_TT_STATE:
goto tr_handle_get_tt_state;
case UR_GET_STATUS:
goto tr_handle_get_port_status;
default:
goto tr_stalled;
}
break;
case UT_READ_CLASS_DEVICE:
switch (req->bRequest) {
case UR_GET_DESCRIPTOR:
goto tr_handle_get_class_descriptor;
case UR_GET_STATUS:
goto tr_handle_get_class_status;
default:
goto tr_stalled;
}
break;
default:
goto tr_stalled;
}
goto tr_valid;
tr_handle_get_descriptor:
switch (value >> 8) {
case UDESC_DEVICE:
if (value & 0xff) {
goto tr_stalled;
}
len = sizeof(at91dci_devd);
ptr = (const void *)&at91dci_devd;
goto tr_valid;
case UDESC_CONFIG:
if (value & 0xff) {
goto tr_stalled;
}
len = sizeof(at91dci_confd);
ptr = (const void *)&at91dci_confd;
goto tr_valid;
case UDESC_STRING:
switch (value & 0xff) {
case 0: /* Language table */
len = sizeof(usb_string_lang_en);
ptr = (const void *)&usb_string_lang_en;
goto tr_valid;
case 1: /* Vendor */
len = sizeof(at91dci_vendor);
ptr = (const void *)&at91dci_vendor;
goto tr_valid;
case 2: /* Product */
len = sizeof(at91dci_product);
ptr = (const void *)&at91dci_product;
goto tr_valid;
default:
break;
}
break;
default:
goto tr_stalled;
}
goto tr_stalled;
tr_handle_get_config:
len = 1;
sc->sc_hub_temp.wValue[0] = sc->sc_conf;
goto tr_valid;
tr_handle_get_status:
len = 2;
USETW(sc->sc_hub_temp.wValue, UDS_SELF_POWERED);
goto tr_valid;
tr_handle_set_address:
if (value & 0xFF00) {
goto tr_stalled;
}
sc->sc_rt_addr = value;
goto tr_valid;
tr_handle_set_config:
if (value >= 2) {
goto tr_stalled;
}
sc->sc_conf = value;
goto tr_valid;
tr_handle_get_interface:
len = 1;
sc->sc_hub_temp.wValue[0] = 0;
goto tr_valid;
tr_handle_get_tt_state:
tr_handle_get_class_status:
tr_handle_get_iface_status:
tr_handle_get_ep_status:
len = 2;
USETW(sc->sc_hub_temp.wValue, 0);
goto tr_valid;
tr_handle_set_halt:
tr_handle_set_interface:
tr_handle_set_wakeup:
tr_handle_clear_wakeup:
tr_handle_clear_halt:
goto tr_valid;
tr_handle_clear_port_feature:
if (index != 1) {
goto tr_stalled;
}
DPRINTFN(9, "UR_CLEAR_PORT_FEATURE on port %d\n", index);
switch (value) {
case UHF_PORT_SUSPEND:
at91dci_wakeup_peer(sc);
break;
case UHF_PORT_ENABLE:
sc->sc_flags.port_enabled = 0;
break;
case UHF_PORT_TEST:
case UHF_PORT_INDICATOR:
case UHF_C_PORT_ENABLE:
case UHF_C_PORT_OVER_CURRENT:
case UHF_C_PORT_RESET:
/* nops */
break;
case UHF_PORT_POWER:
sc->sc_flags.port_powered = 0;
at91dci_pull_down(sc);
at91dci_clocks_off(sc);
break;
case UHF_C_PORT_CONNECTION:
sc->sc_flags.change_connect = 0;
break;
case UHF_C_PORT_SUSPEND:
sc->sc_flags.change_suspend = 0;
break;
default:
err = USB_ERR_IOERROR;
goto done;
}
goto tr_valid;
tr_handle_set_port_feature:
if (index != 1) {
goto tr_stalled;
}
DPRINTFN(9, "UR_SET_PORT_FEATURE\n");
switch (value) {
case UHF_PORT_ENABLE:
sc->sc_flags.port_enabled = 1;
break;
case UHF_PORT_SUSPEND:
case UHF_PORT_RESET:
case UHF_PORT_TEST:
case UHF_PORT_INDICATOR:
/* nops */
break;
case UHF_PORT_POWER:
sc->sc_flags.port_powered = 1;
break;
default:
err = USB_ERR_IOERROR;
goto done;
}
goto tr_valid;
tr_handle_get_port_status:
DPRINTFN(9, "UR_GET_PORT_STATUS\n");
if (index != 1) {
goto tr_stalled;
}
if (sc->sc_flags.status_vbus) {
at91dci_clocks_on(sc);
at91dci_pull_up(sc);
} else {
at91dci_pull_down(sc);
at91dci_clocks_off(sc);
}
/* Select FULL-speed and Device Side Mode */
value = UPS_PORT_MODE_DEVICE;
if (sc->sc_flags.port_powered) {
value |= UPS_PORT_POWER;
}
if (sc->sc_flags.port_enabled) {
value |= UPS_PORT_ENABLED;
}
if (sc->sc_flags.status_vbus &&
sc->sc_flags.status_bus_reset) {
value |= UPS_CURRENT_CONNECT_STATUS;
}
if (sc->sc_flags.status_suspend) {
value |= UPS_SUSPEND;
}
USETW(sc->sc_hub_temp.ps.wPortStatus, value);
value = 0;
if (sc->sc_flags.change_connect) {
value |= UPS_C_CONNECT_STATUS;
if (sc->sc_flags.status_vbus &&
sc->sc_flags.status_bus_reset) {
/* reset endpoint flags */
memset(sc->sc_ep_flags, 0, sizeof(sc->sc_ep_flags));
}
}
if (sc->sc_flags.change_suspend) {
value |= UPS_C_SUSPEND;
}
USETW(sc->sc_hub_temp.ps.wPortChange, value);
len = sizeof(sc->sc_hub_temp.ps);
goto tr_valid;
tr_handle_get_class_descriptor:
if (value & 0xFF) {
goto tr_stalled;
}
ptr = (const void *)&at91dci_hubd;
len = sizeof(at91dci_hubd);
goto tr_valid;
tr_stalled:
err = USB_ERR_STALLED;
tr_valid:
done:
*plength = len;
*pptr = ptr;
return (err);
}
static void
at91dci_xfer_setup(struct usb_setup_params *parm)
{
const struct usb_hw_ep_profile *pf;
struct at91dci_softc *sc;
struct usb_xfer *xfer;
void *last_obj;
uint32_t ntd;
uint32_t n;
uint8_t ep_no;
sc = AT9100_DCI_BUS2SC(parm->udev->bus);
xfer = parm->curr_xfer;
/*
* NOTE: This driver does not use any of the parameters that
* are computed from the following values. Just set some
* reasonable dummies:
*/
parm->hc_max_packet_size = 0x500;
parm->hc_max_packet_count = 1;
parm->hc_max_frame_size = 0x500;
usbd_transfer_setup_sub(parm);
/*
* compute maximum number of TDs
*/
if (parm->methods == &at91dci_device_ctrl_methods) {
ntd = xfer->nframes + 1 /* STATUS */ + 1 /* SYNC 1 */
+ 1 /* SYNC 2 */ ;
} else if (parm->methods == &at91dci_device_bulk_methods) {
ntd = xfer->nframes + 1 /* SYNC */ ;
} else if (parm->methods == &at91dci_device_intr_methods) {
ntd = xfer->nframes + 1 /* SYNC */ ;
} else if (parm->methods == &at91dci_device_isoc_fs_methods) {
ntd = xfer->nframes + 1 /* SYNC */ ;
} else {
ntd = 0;
}
/*
* check if "usbd_transfer_setup_sub" set an error
*/
if (parm->err) {
return;
}
/*
* allocate transfer descriptors
*/
last_obj = NULL;
/*
* get profile stuff
*/
if (ntd) {
ep_no = xfer->endpointno & UE_ADDR;
at91dci_get_hw_ep_profile(parm->udev, &pf, ep_no);
if (pf == NULL) {
/* should not happen */
parm->err = USB_ERR_INVAL;
return;
}
} else {
ep_no = 0;
pf = NULL;
}
/* align data */
parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
for (n = 0; n != ntd; n++) {
struct at91dci_td *td;
if (parm->buf) {
td = USB_ADD_BYTES(parm->buf, parm->size[0]);
/* init TD */
td->max_packet_size = xfer->max_packet_size;
td->status_reg = AT91_UDP_CSR(ep_no);
td->fifo_reg = AT91_UDP_FDR(ep_no);
if (pf->support_multi_buffer) {
td->support_multi_buffer = 1;
}
td->obj_next = last_obj;
last_obj = td;
}
parm->size[0] += sizeof(*td);
}
xfer->td_start[0] = last_obj;
}
static void
at91dci_xfer_unsetup(struct usb_xfer *xfer)
{
return;
}
static void
at91dci_ep_init(struct usb_device *udev, struct usb_endpoint_descriptor *edesc,
struct usb_endpoint *ep)
{
struct at91dci_softc *sc = AT9100_DCI_BUS2SC(udev->bus);
DPRINTFN(2, "endpoint=%p, addr=%d, endpt=%d, mode=%d (%d)\n",
ep, udev->address,
edesc->bEndpointAddress, udev->flags.usb_mode,
sc->sc_rt_addr);
if (udev->device_index != sc->sc_rt_addr) {
if (udev->speed != USB_SPEED_FULL) {
/* not supported */
return;
}
switch (edesc->bmAttributes & UE_XFERTYPE) {
case UE_CONTROL:
ep->methods = &at91dci_device_ctrl_methods;
break;
case UE_INTERRUPT:
ep->methods = &at91dci_device_intr_methods;
break;
case UE_ISOCHRONOUS:
ep->methods = &at91dci_device_isoc_fs_methods;
break;
case UE_BULK:
ep->methods = &at91dci_device_bulk_methods;
break;
default:
/* do nothing */
break;
}
}
}
static void
at91dci_set_hw_power_sleep(struct usb_bus *bus, uint32_t state)
{
struct at91dci_softc *sc = AT9100_DCI_BUS2SC(bus);
switch (state) {
case USB_HW_POWER_SUSPEND:
at91dci_suspend(sc);
break;
case USB_HW_POWER_SHUTDOWN:
at91dci_uninit(sc);
break;
case USB_HW_POWER_RESUME:
at91dci_resume(sc);
break;
default:
break;
}
}
static const struct usb_bus_methods at91dci_bus_methods =
{
.endpoint_init = &at91dci_ep_init,
.xfer_setup = &at91dci_xfer_setup,
.xfer_unsetup = &at91dci_xfer_unsetup,
.get_hw_ep_profile = &at91dci_get_hw_ep_profile,
.set_stall = &at91dci_set_stall,
.xfer_stall = &at91dci_xfer_stall,
.clear_stall = &at91dci_clear_stall,
.roothub_exec = &at91dci_roothub_exec,
.xfer_poll = &at91dci_do_poll,
.set_hw_power_sleep = &at91dci_set_hw_power_sleep,
};
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