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NetBSD/sys/dev/ic/iavc.c

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/* $NetBSD: iavc.c,v 1.12 2014/03/23 02:44:19 christos Exp $ */
/*
* Copyright (c) 2001-2003 Cubical Solutions Ltd. 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.
*
* The AVM ISDN controllers' card specific support routines.
*
* $FreeBSD: src/sys/i4b/capi/iavc/iavc_card.c,v 1.1.2.1 2001/08/10 14:08:34 obrien Exp $
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: iavc.c,v 1.12 2014/03/23 02:44:19 christos Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/device.h>
#include <sys/callout.h>
#include <sys/reboot.h>
#include <net/if.h>
#include <sys/bus.h>
#include <netisdn/i4b_debug.h>
#include <netisdn/i4b_ioctl.h>
#include <netisdn/i4b_trace.h>
#include <netisdn/i4b_global.h>
#include <netisdn/i4b_l3l4.h>
#include <netisdn/i4b_mbuf.h>
#include <netisdn/i4b_capi.h>
#include <netisdn/i4b_capi_msgs.h>
#include <dev/ic/iavcvar.h>
#include <dev/ic/iavcreg.h>
/*
// AVM B1 (active BRI, PIO mode)
*/
int
iavc_b1_detect(iavc_softc_t *sc)
{
if ((iavc_read_port(sc, B1_INSTAT) & 0xfc) ||
(iavc_read_port(sc, B1_OUTSTAT) & 0xfc))
return (1);
b1io_outp(sc, B1_INSTAT, 0x02);
b1io_outp(sc, B1_OUTSTAT, 0x02);
if ((iavc_read_port(sc, B1_INSTAT) & 0xfe) != 2 ||
(iavc_read_port(sc, B1_OUTSTAT) & 0xfe) != 2)
return (2);
b1io_outp(sc, B1_INSTAT, 0x00);
b1io_outp(sc, B1_OUTSTAT, 0x00);
if ((iavc_read_port(sc, B1_INSTAT) & 0xfe) ||
(iavc_read_port(sc, B1_OUTSTAT) & 0xfe))
return (3);
return (0); /* found */
}
void
iavc_b1_disable_irq(iavc_softc_t *sc)
{
b1io_outp(sc, B1_INSTAT, 0x00);
}
void
iavc_b1_reset(iavc_softc_t *sc)
{
b1io_outp(sc, B1_RESET, 0);
DELAY(55*2*1000);
b1io_outp(sc, B1_RESET, 1);
DELAY(55*2*1000);
b1io_outp(sc, B1_RESET, 0);
DELAY(55*2*1000);
}
/*
// Newer PCI-based B1's, and T1's, supports DMA
*/
int
iavc_b1dma_detect(iavc_softc_t *sc)
{
AMCC_WRITE(sc, AMCC_MCSR, 0);
DELAY(10*1000);
AMCC_WRITE(sc, AMCC_MCSR, 0x0f000000);
DELAY(10*1000);
AMCC_WRITE(sc, AMCC_MCSR, 0);
DELAY(42*1000);
AMCC_WRITE(sc, AMCC_RXLEN, 0);
AMCC_WRITE(sc, AMCC_TXLEN, 0);
sc->sc_csr = 0;
AMCC_WRITE(sc, AMCC_INTCSR, sc->sc_csr);
if (AMCC_READ(sc, AMCC_INTCSR) != 0)
return 1;
AMCC_WRITE(sc, AMCC_RXPTR, 0xffffffff);
AMCC_WRITE(sc, AMCC_TXPTR, 0xffffffff);
if ((AMCC_READ(sc, AMCC_RXPTR) != 0xfffffffc) ||
(AMCC_READ(sc, AMCC_TXPTR) != 0xfffffffc))
return 2;
AMCC_WRITE(sc, AMCC_RXPTR, 0);
AMCC_WRITE(sc, AMCC_TXPTR, 0);
if ((AMCC_READ(sc, AMCC_RXPTR) != 0) ||
(AMCC_READ(sc, AMCC_TXPTR) != 0))
return 3;
iavc_write_port(sc, 0x10, 0x00);
iavc_write_port(sc, 0x07, 0x00);
iavc_write_port(sc, 0x02, 0x02);
iavc_write_port(sc, 0x03, 0x02);
if (((iavc_read_port(sc, 0x02) & 0xfe) != 0x02) ||
(iavc_read_port(sc, 0x03) != 0x03))
return 4;
iavc_write_port(sc, 0x02, 0x00);
iavc_write_port(sc, 0x03, 0x00);
if (((iavc_read_port(sc, 0x02) & 0xfe) != 0x00) ||
(iavc_read_port(sc, 0x03) != 0x01))
return 5;
return (0); /* found */
}
void
iavc_b1dma_reset(iavc_softc_t *sc)
{
int s = splnet();
sc->sc_csr = 0;
AMCC_WRITE(sc, AMCC_INTCSR, sc->sc_csr);
AMCC_WRITE(sc, AMCC_MCSR, 0);
AMCC_WRITE(sc, AMCC_RXLEN, 0);
AMCC_WRITE(sc, AMCC_TXLEN, 0);
iavc_write_port(sc, 0x10, 0x00); /* XXX magic numbers from */
iavc_write_port(sc, 0x07, 0x00); /* XXX the linux driver */
splx(s);
AMCC_WRITE(sc, AMCC_MCSR, 0);
DELAY(10 * 1000);
AMCC_WRITE(sc, AMCC_MCSR, 0x0f000000);
DELAY(10 * 1000);
AMCC_WRITE(sc, AMCC_MCSR, 0);
DELAY(42 * 1000);
}
/*
// AVM T1 (active PRI)
*/
#define b1dma_tx_empty(sc) (b1io_read_reg((sc), T1_OUTSTAT) & 1)
#define b1dma_rx_full(sc) (b1io_read_reg((sc), T1_INSTAT) & 1)
static int b1dma_tolink(iavc_softc_t *sc, void *buf, int len)
{
volatile int spin;
char *s = (char*) buf;
while (len--) {
spin = 0;
while (!b1dma_tx_empty(sc) && spin < 100000)
spin++;
if (!b1dma_tx_empty(sc))
return -1;
t1io_outp(sc, 1, *s++);
}
return 0;
}
static int b1dma_fromlink(iavc_softc_t *sc, void *buf, int len)
{
volatile int spin;
char *s = (char*) buf;
while (len--) {
spin = 0;
while (!b1dma_rx_full(sc) && spin < 100000)
spin++;
if (!b1dma_rx_full(sc))
return -1;
*s++ = t1io_inp(sc, 0);
}
return 0;
}
static int WriteReg(iavc_softc_t *sc, u_int32_t reg, u_int8_t val)
{
u_int8_t cmd = 0;
if (b1dma_tolink(sc, &cmd, 1) == 0 &&
b1dma_tolink(sc, &reg, 4) == 0) {
u_int32_t tmp = val;
return b1dma_tolink(sc, &tmp, 4);
}
return -1;
}
static u_int8_t ReadReg(iavc_softc_t *sc, u_int32_t reg)
{
u_int8_t cmd = 1;
if (b1dma_tolink(sc, &cmd, 1) == 0 &&
b1dma_tolink(sc, &reg, 4) == 0) {
u_int32_t tmp;
if (b1dma_fromlink(sc, &tmp, 4) == 0)
return (u_int8_t) tmp;
}
return 0xff;
}
int
iavc_t1_detect(iavc_softc_t *sc)
{
int ret = iavc_b1dma_detect(sc);
if (ret) return ret;
if ((WriteReg(sc, 0x80001000, 0x11) != 0) ||
(WriteReg(sc, 0x80101000, 0x22) != 0) ||
(WriteReg(sc, 0x80201000, 0x33) != 0) ||
(WriteReg(sc, 0x80301000, 0x44) != 0))
return 6;
if ((ReadReg(sc, 0x80001000) != 0x11) ||
(ReadReg(sc, 0x80101000) != 0x22) ||
(ReadReg(sc, 0x80201000) != 0x33) ||
(ReadReg(sc, 0x80301000) != 0x44))
return 7;
if ((WriteReg(sc, 0x80001000, 0x55) != 0) ||
(WriteReg(sc, 0x80101000, 0x66) != 0) ||
(WriteReg(sc, 0x80201000, 0x77) != 0) ||
(WriteReg(sc, 0x80301000, 0x88) != 0))
return 8;
if ((ReadReg(sc, 0x80001000) != 0x55) ||
(ReadReg(sc, 0x80101000) != 0x66) ||
(ReadReg(sc, 0x80201000) != 0x77) ||
(ReadReg(sc, 0x80301000) != 0x88))
return 9;
return 0; /* found */
}
void
iavc_t1_disable_irq(iavc_softc_t *sc)
{
iavc_write_port(sc, T1_IRQMASTER, 0x00);
}
void
iavc_t1_reset(iavc_softc_t *sc)
{
iavc_b1_reset(sc);
iavc_write_port(sc, B1_INSTAT, 0x00);
iavc_write_port(sc, B1_OUTSTAT, 0x00);
iavc_write_port(sc, T1_IRQMASTER, 0x00);
iavc_write_port(sc, T1_RESETBOARD, 0x0f);
}
/* Forward declarations of local subroutines... */
static int iavc_send_init(iavc_softc_t *);
static void iavc_handle_rx(iavc_softc_t *);
static void iavc_start_tx(iavc_softc_t *);
static uint32_t iavc_tx_capimsg(iavc_softc_t *, struct mbuf *);
static uint32_t iavc_tx_ctrlmsg(iavc_softc_t *, struct mbuf *);
/*
// Callbacks from the upper (capi) layer:
// --------------------------------------
//
// iavc_load
// Resets the board and loads the firmware, then initiates
// board startup.
//
// iavc_register
// Registers a CAPI application id.
//
// iavc_release
// Releases a CAPI application id.
//
// iavc_send
// Sends a capi message.
*/
int iavc_load(capi_softc_t *capi_sc, int len, u_int8_t *cp)
{
iavc_softc_t *sc = (iavc_softc_t*) capi_sc->ctx;
u_int8_t val;
aprint_debug_dev(sc->sc_dev, "reset card ....\n");
if (sc->sc_dma)
iavc_b1dma_reset(sc); /* PCI cards */
else if (sc->sc_t1)
iavc_t1_reset(sc); /* ISA attachment T1 */
else
iavc_b1_reset(sc); /* ISA attachment B1 */
DELAY(1000);
aprint_debug_dev(sc->sc_dev, "start loading %d bytes firmware\n", len);
while (len && b1io_save_put_byte(sc, *cp++) == 0)
len--;
if (len) {
aprint_error_dev(sc->sc_dev, "loading failed, can't write to card, len = %d\n", len);
return (EIO);
}
aprint_debug_dev(sc->sc_dev, "firmware loaded, wait for ACK\n");
if(sc->sc_capi.card_type == CARD_TYPEC_AVM_B1_ISA)
iavc_put_byte(sc, SEND_POLL);
else
iavc_put_byte(sc, SEND_POLLACK);
for (len = 0; len < 1000 && !iavc_rx_full(sc); len++)
DELAY(100);
if (!iavc_rx_full(sc)) {
aprint_error_dev(sc->sc_dev, "loading failed, no ack\n");
return (EIO);
}
val = iavc_get_byte(sc);
if ((sc->sc_dma && val != RECEIVE_POLLDWORD) ||
(!sc->sc_dma && val != RECEIVE_POLL)) {
aprint_error_dev(sc->sc_dev, "loading failed, bad ack = %02x\n", val);
return (EIO);
}
aprint_debug_dev(sc->sc_dev, "got ACK = 0x%02x\n", val);
/* Start the DMA engine */
if (sc->sc_dma) {
int s;
s = splnet();
sc->sc_csr = AVM_FLAG;
AMCC_WRITE(sc, AMCC_INTCSR, sc->sc_csr);
AMCC_WRITE(sc, AMCC_MCSR, (EN_A2P_TRANSFERS|EN_P2A_TRANSFERS|
A2P_HI_PRIORITY|P2A_HI_PRIORITY|
RESET_A2P_FLAGS|RESET_P2A_FLAGS));
iavc_write_port(sc, 0x07, 0x30); /* XXX magic numbers from */
iavc_write_port(sc, 0x10, 0xf0); /* XXX the linux driver */
bus_dmamap_sync(sc->dmat, sc->rx_map, 0, sc->rx_map->dm_mapsize,
BUS_DMASYNC_PREREAD);
sc->sc_recv1 = 0;
AMCC_WRITE(sc, AMCC_RXPTR, sc->rx_map->dm_segs[0].ds_addr);
AMCC_WRITE(sc, AMCC_RXLEN, 4);
sc->sc_csr |= EN_RX_TC_INT|EN_TX_TC_INT;
AMCC_WRITE(sc, AMCC_INTCSR, sc->sc_csr);
splx(s);
}
#ifdef notyet
/* good happy place */
if(sc->sc_capi.card_type == CARD_TYPEC_AVM_B1_ISA)
b1isa_setup_irq(sc);
#endif
iavc_send_init(sc);
return 0;
}
int iavc_register(capi_softc_t *capi_sc, int applid, int nchan)
{
iavc_softc_t *sc = (iavc_softc_t*) capi_sc->ctx;
struct mbuf *m = i4b_Dgetmbuf(23);
u_int8_t *p;
if (!m) {
aprint_error("iavc%d: can't get memory\n", sc->sc_unit);
return (ENOMEM);
}
/*
* byte 0x12 = SEND_REGISTER
* dword ApplId
* dword NumMessages
* dword NumB3Connections 0..nbch
* dword NumB3Blocks
* dword B3Size
*/
p = amcc_put_byte(mtod(m, u_int8_t*), 0);
p = amcc_put_byte(p, 0);
p = amcc_put_byte(p, SEND_REGISTER);
p = amcc_put_word(p, applid);
#if 0
p = amcc_put_word(p, 1024 + (nchan + 1));
#else
p = amcc_put_word(p, 1024 * (nchan + 1));
#endif
p = amcc_put_word(p, nchan);
p = amcc_put_word(p, 8);
p = amcc_put_word(p, 2048);
IF_ENQUEUE(&sc->sc_txq, m);
iavc_start_tx(sc);
return 0;
}
int iavc_release(capi_softc_t *capi_sc, int applid)
{
iavc_softc_t *sc = (iavc_softc_t*) capi_sc->ctx;
struct mbuf *m = i4b_Dgetmbuf(7);
u_int8_t *p;
if (!m) {
aprint_error_dev(sc->sc_dev, "can't get memory\n");
return (ENOMEM);
}
/*
* byte 0x14 = SEND_RELEASE
* dword ApplId
*/
p = amcc_put_byte(mtod(m, u_int8_t*), 0);
p = amcc_put_byte(p, 0);
p = amcc_put_byte(p, SEND_RELEASE);
p = amcc_put_word(p, applid);
IF_ENQUEUE(&sc->sc_txq, m);
iavc_start_tx(sc);
return 0;
}
int iavc_send(capi_softc_t *capi_sc, struct mbuf *m)
{
iavc_softc_t *sc = (iavc_softc_t*) capi_sc->ctx;
if (sc->sc_state != IAVC_UP) {
aprint_error_dev(sc->sc_dev, "attempt to send before device up\n");
if (m->m_next) i4b_Bfreembuf(m->m_next);
i4b_Dfreembuf(m);
return (ENXIO);
}
if (IF_QFULL(&sc->sc_txq)) {
IF_DROP(&sc->sc_txq);
aprint_error_dev(sc->sc_dev, "tx overflow, message dropped\n");
if (m->m_next) i4b_Bfreembuf(m->m_next);
i4b_Dfreembuf(m);
} else {
IF_ENQUEUE(&sc->sc_txq, m);
iavc_start_tx(sc);
}
return 0;
}
/*
// Functions called by ourself during the initialization sequence:
// ---------------------------------------------------------------
//
// iavc_send_init
// Sends the system initialization message to a newly loaded
// board, and sets state to INIT.
*/
static int iavc_send_init(iavc_softc_t *sc)
{
struct mbuf *m = i4b_Dgetmbuf(15);
u_int8_t *p;
int s;
if (!m) {
aprint_error_dev(sc->sc_dev, "can't get memory\n");
return (ENOMEM);
}
/*
* byte 0x11 = SEND_INIT
* dword NumApplications
* dword NumNCCIs
* dword BoardNumber
*/
p = amcc_put_byte(mtod(m, u_int8_t*), 0);
p = amcc_put_byte(p, 0);
p = amcc_put_byte(p, SEND_INIT);
p = amcc_put_word(p, 1); /* XXX MaxAppl XXX */
p = amcc_put_word(p, sc->sc_capi.sc_nbch);
p = amcc_put_word(p, sc->sc_unit);
s = splnet();
IF_ENQUEUE(&sc->sc_txq, m);
iavc_start_tx(sc);
sc->sc_state = IAVC_INIT;
splx(s);
return 0;
}
/*
// Functions called during normal operation:
// -----------------------------------------
//
// iavc_receive_init
// Reads the initialization reply and calls capi_ll_control().
//
// iavc_receive_new_ncci
// Reads a new NCCI notification and calls capi_ll_control().
//
// iavc_receive_free_ncci
// Reads a freed NCCI notification and calls capi_ll_control().
//
// iavc_receive_task_ready
// Reads a task ready message -- which should not occur XXX.
//
// iavc_receive_debugmsg
// Reads a debug message -- which should not occur XXX.
//
// iavc_receive_start
// Reads a START TRANSMIT message and unblocks device.
//
// iavc_receive_stop
// Reads a STOP TRANSMIT message and blocks device.
//
// iavc_receive
// Reads an incoming message and calls capi_ll_receive().
*/
static int iavc_receive_init(iavc_softc_t *sc, u_int8_t *dmabuf)
{
u_int32_t Length;
u_int8_t *p;
u_int8_t *cardtype, *serial, *profile, *vers, *caps, *prot;
if (sc->sc_dma) {
p = amcc_get_word(dmabuf, &Length);
} else {
Length = iavc_get_slice(sc, sc->sc_recvbuf);
p = sc->sc_recvbuf;
}
#if 0
{
int len = 0;
printf("%s: rx_init: ", device_xname(sc->sc_dev));
while (len < Length) {
printf(" %02x", p[len]);
if (len && (len % 16) == 0) printf("\n");
len++;
}
if (len % 16) printf("\n");
}
#endif
vers = (p + 1);
p += (*p + 1); /* driver version */
cardtype = (p + 1);
p += (*p + 1); /* card type */
p += (*p + 1); /* hardware ID */
serial = (p + 1);
p += (*p + 1); /* serial number */
caps = (p + 1);
p += (*p + 1); /* supported options */
prot = (p + 1);
p += (*p + 1); /* supported protocols */
profile = (p + 1);
if (cardtype && serial && profile) {
int nbch = ((profile[3]<<8) | profile[2]);
aprint_normal_dev(sc->sc_dev, "AVM %s, s/n %s, %d chans, f/w rev %s, prot %s\n",
cardtype, serial, nbch, vers, prot);
aprint_verbose_dev(sc->sc_dev, "%s\n", caps);
capi_ll_control(&sc->sc_capi, CAPI_CTRL_PROFILE, (intptr_t) profile);
} else {
printf("%s: no profile data in info response?\n", device_xname(sc->sc_dev));
}
sc->sc_blocked = 1; /* controller will send START when ready */
return 0;
}
static int iavc_receive_start(iavc_softc_t *sc)
{
struct mbuf *m = i4b_Dgetmbuf(3);
u_int8_t *p;
if (sc->sc_blocked && sc->sc_state == IAVC_UP)
printf("%s: receive_start\n", device_xname(sc->sc_dev));
if (!m) {
aprint_error_dev(sc->sc_dev, "can't get memory\n");
return (ENOMEM);
}
/*
* byte 0x73 = SEND_POLLACK
*/
p = amcc_put_byte(mtod(m, u_int8_t*), 0);
p = amcc_put_byte(p, 0);
p = amcc_put_byte(p, SEND_POLLACK);
IF_PREPEND(&sc->sc_txq, m);
NDBGL4(L4_IAVCDBG, "%s: blocked = %d, state = %d",
device_xname(sc->sc_dev), sc->sc_blocked, sc->sc_state);
sc->sc_blocked = 0;
iavc_start_tx(sc);
/* If this was our first START, register our readiness */
if (sc->sc_state != IAVC_UP) {
sc->sc_state = IAVC_UP;
capi_ll_control(&sc->sc_capi, CAPI_CTRL_READY, 1);
}
return 0;
}
static int iavc_receive_stop(iavc_softc_t *sc)
{
printf("%s: receive_stop\n", device_xname(sc->sc_dev));
sc->sc_blocked = 1;
return 0;
}
static int iavc_receive_new_ncci(iavc_softc_t *sc, u_int8_t *dmabuf)
{
u_int32_t ApplId, NCCI, WindowSize;
if (sc->sc_dma) {
dmabuf = amcc_get_word(dmabuf, &ApplId);
dmabuf = amcc_get_word(dmabuf, &NCCI);
dmabuf = amcc_get_word(dmabuf, &WindowSize);
} else {
ApplId = iavc_get_word(sc);
NCCI = iavc_get_word(sc);
WindowSize = iavc_get_word(sc);
}
capi_ll_control(&sc->sc_capi, CAPI_CTRL_NEW_NCCI, NCCI);
return 0;
}
static int iavc_receive_free_ncci(iavc_softc_t *sc, u_int8_t *dmabuf)
{
u_int32_t ApplId, NCCI;
if (sc->sc_dma) {
dmabuf = amcc_get_word(dmabuf, &ApplId);
dmabuf = amcc_get_word(dmabuf, &NCCI);
} else {
ApplId = iavc_get_word(sc);
NCCI = iavc_get_word(sc);
}
capi_ll_control(&sc->sc_capi, CAPI_CTRL_FREE_NCCI, NCCI);
return 0;
}
static int iavc_receive_task_ready(iavc_softc_t *sc, u_int8_t *dmabuf)
{
u_int32_t TaskId, Length;
u_int8_t *p;
printf("%s: receive_task_ready\n", device_xname(sc->sc_dev));
if (sc->sc_dma) {
p = amcc_get_word(dmabuf, &TaskId);
p = amcc_get_word(p, &Length);
} else {
TaskId = iavc_get_word(sc);
Length = iavc_get_slice(sc, sc->sc_recvbuf);
p = sc->sc_recvbuf;
}
/* XXX could show the message if trace enabled? XXX */
return 0;
}
static int iavc_receive_debugmsg(iavc_softc_t *sc, u_int8_t *dmabuf)
{
u_int32_t Length;
printf("%s: receive_debugmsg\n", device_xname(sc->sc_dev));
if (sc->sc_dma) {
amcc_get_word(dmabuf, &Length);
} else {
Length = iavc_get_slice(sc, sc->sc_recvbuf);
}
/* XXX could show the message if trace enabled? XXX */
return 0;
}
static int iavc_receive(iavc_softc_t *sc, u_int8_t *dmabuf, int b3data)
{
struct mbuf *m;
u_int32_t ApplId, Length;
/*
* byte 0x21 = RECEIVE_MESSAGE
* dword ApplId
* dword length
* ... CAPI msg
*
* --or--
*
* byte 0x22 = RECEIVE_DATA_B3_IND
* dword ApplId
* dword length
* ... CAPI msg
* dword datalen
* ... B3 data
*/
if (sc->sc_dma) {
dmabuf = amcc_get_word(dmabuf, &ApplId);
dmabuf = amcc_get_word(dmabuf, &Length);
} else {
ApplId = iavc_get_word(sc);
Length = iavc_get_slice(sc, sc->sc_recvbuf);
dmabuf = sc->sc_recvbuf;
}
m = i4b_Dgetmbuf(Length);
if (!m) {
aprint_error_dev(sc->sc_dev, "can't get memory for receive\n");
return (ENOMEM);
}
memcpy(mtod(m, u_int8_t*), dmabuf, Length);
#if 0
{
u_int8_t *p = mtod(m, u_int8_t*);
int len = 0;
printf("%s: applid=%d, len=%d\n", device_xname(sc->sc_dev),
ApplId, Length);
while (len < m->m_len) {
printf(" %02x", p[len]);
if (len && (len % 16) == 0) printf("\n");
len++;
}
if (len % 16) printf("\n");
}
#endif
if (b3data) {
if (sc->sc_dma) {
dmabuf = amcc_get_word(dmabuf + Length, &Length);
} else {
Length = iavc_get_slice(sc, sc->sc_recvbuf);
dmabuf = sc->sc_recvbuf;
}
m->m_next = i4b_Bgetmbuf(Length);
if (!m->m_next) {
aprint_error_dev(sc->sc_dev, "can't get memory for receive\n");
i4b_Dfreembuf(m);
return (ENOMEM);
}
memcpy(mtod(m->m_next, u_int8_t*), dmabuf, Length);
}
capi_ll_receive(&sc->sc_capi, m);
return 0;
}
/*
// iavc_handle_intr
// Checks device interrupt status and calls iavc_handle_{rx,tx}()
// as necessary.
//
// iavc_handle_rx
// Reads in the command byte and calls the subroutines above.
//
// iavc_start_tx
// Initiates DMA on the next queued message if possible.
*/
int iavc_handle_intr(iavc_softc_t *sc)
{
u_int32_t status;
u_int32_t newcsr;
if (!sc->sc_dma) {
while (iavc_rx_full(sc))
iavc_handle_rx(sc);
return 0;
}
status = AMCC_READ(sc, AMCC_INTCSR);
if ((status & ANY_S5933_INT) == 0)
return 0;
newcsr = sc->sc_csr | (status & ALL_INT);
if (status & TX_TC_INT) newcsr &= ~EN_TX_TC_INT;
if (status & RX_TC_INT) newcsr &= ~EN_RX_TC_INT;
AMCC_WRITE(sc, AMCC_INTCSR, newcsr);
sc->sc_intr = 1;
if (status & RX_TC_INT) {
u_int32_t rxlen;
bus_dmamap_sync(sc->dmat, sc->rx_map, 0, sc->rx_map->dm_mapsize,
BUS_DMASYNC_POSTREAD);
if (sc->sc_recv1 == 0) {
sc->sc_recv1 = *(u_int32_t*)(sc->sc_recvbuf);
rxlen = (sc->sc_recv1 + 3) & ~3;
AMCC_WRITE(sc, AMCC_RXPTR, sc->rx_map->dm_segs[0].ds_addr);
AMCC_WRITE(sc, AMCC_RXLEN, rxlen ? rxlen : 4);
} else {
iavc_handle_rx(sc);
sc->sc_recv1 = 0;
AMCC_WRITE(sc, AMCC_RXPTR, sc->rx_map->dm_segs[0].ds_addr);
AMCC_WRITE(sc, AMCC_RXLEN, 4);
}
}
if (status & TX_TC_INT) {
bus_dmamap_sync(sc->dmat, sc->tx_map, 0, sc->tx_map->dm_mapsize,
BUS_DMASYNC_POSTWRITE);
sc->sc_csr &= ~EN_TX_TC_INT;
iavc_start_tx(sc);
}
AMCC_WRITE(sc, AMCC_INTCSR, sc->sc_csr);
sc->sc_intr = 0;
return 0;
}
static void iavc_handle_rx(iavc_softc_t *sc)
{
u_int8_t *dmabuf = 0, cmd;
if (sc->sc_dma) {
dmabuf = amcc_get_byte(sc->sc_recvbuf, &cmd);
} else {
cmd = iavc_get_byte(sc);
}
NDBGL4(L4_IAVCDBG, "iavc%d: command = 0x%02x", sc->sc_unit, cmd);
switch (cmd) {
case RECEIVE_DATA_B3_IND:
iavc_receive(sc, dmabuf, 1);
break;
case RECEIVE_MESSAGE:
iavc_receive(sc, dmabuf, 0);
break;
case RECEIVE_NEW_NCCI:
iavc_receive_new_ncci(sc, dmabuf);
break;
case RECEIVE_FREE_NCCI:
iavc_receive_free_ncci(sc, dmabuf);
break;
case RECEIVE_START:
iavc_receive_start(sc);
break;
case RECEIVE_STOP:
iavc_receive_stop(sc);
break;
case RECEIVE_INIT:
iavc_receive_init(sc, dmabuf);
break;
case RECEIVE_TASK_READY:
iavc_receive_task_ready(sc, dmabuf);
break;
case RECEIVE_DEBUGMSG:
iavc_receive_debugmsg(sc, dmabuf);
break;
default:
aprint_error_dev(sc->sc_dev, "unknown msg %02x\n", cmd);
}
}
static void iavc_start_tx(iavc_softc_t *sc)
{
struct mbuf *m;
u_int32_t txlen;
/* If device has put us on hold, punt. */
if (sc->sc_blocked) {
return;
}
/* If using DMA and transmitter busy, punt. */
if (sc->sc_dma && (sc->sc_csr & EN_TX_TC_INT)) {
return;
}
/* Else, see if we have messages to send. */
IF_DEQUEUE(&sc->sc_txq, m);
if (!m) {
return;
}
/* Have message, will send. */
if (CAPIMSG_LEN(m->m_data)) {
/* A proper CAPI message, possibly with B3 data */
txlen = iavc_tx_capimsg(sc, m);
} else {
/* A board control message to be sent as is */
txlen = iavc_tx_ctrlmsg(sc, m);
}
if (m->m_next) {
i4b_Bfreembuf(m->m_next);
m->m_next = NULL;
}
i4b_Dfreembuf(m);
/* Kick DMA into motion if applicable */
if (sc->sc_dma) {
txlen = (txlen + 3) & ~3;
bus_dmamap_sync(sc->dmat, sc->tx_map, 0, txlen,
BUS_DMASYNC_PREWRITE);
AMCC_WRITE(sc, AMCC_TXPTR, sc->tx_map->dm_segs[0].ds_addr);
AMCC_WRITE(sc, AMCC_TXLEN, txlen);
sc->sc_csr |= EN_TX_TC_INT;
if (!sc->sc_intr)
AMCC_WRITE(sc, AMCC_INTCSR, sc->sc_csr);
}
}
static uint32_t
iavc_tx_capimsg(iavc_softc_t *sc, struct mbuf *m)
{
uint32_t txlen = 0;
u_int8_t *dmabuf;
if (sc->sc_dma) {
/* Copy message to DMA buffer. */
if (m->m_next)
dmabuf = amcc_put_byte(sc->sc_sendbuf, SEND_DATA_B3_REQ);
else
dmabuf = amcc_put_byte(sc->sc_sendbuf, SEND_MESSAGE);
dmabuf = amcc_put_word(dmabuf, m->m_len);
memcpy(dmabuf, m->m_data, m->m_len);
dmabuf += m->m_len;
txlen = 5 + m->m_len;
if (m->m_next) {
dmabuf = amcc_put_word(dmabuf, m->m_next->m_len);
memcpy(dmabuf, m->m_next->m_data, m->m_next->m_len);
txlen += 4 + m->m_next->m_len;
}
} else {
/* Use PIO. */
if (m->m_next) {
iavc_put_byte(sc, SEND_DATA_B3_REQ);
NDBGL4(L4_IAVCDBG, "iavc%d: tx SDB3R msg, len = %d",
sc->sc_unit, m->m_len);
} else {
iavc_put_byte(sc, SEND_MESSAGE);
NDBGL4(L4_IAVCDBG, "iavc%d: tx SM msg, len = %d",
sc->sc_unit, m->m_len);
}
#if 0
{
u_int8_t *p = mtod(m, u_int8_t*);
int len;
for (len = 0; len < m->m_len; len++) {
printf(" %02x", *p++);
if (len && (len % 16) == 0)
printf("\n");
}
if (len % 16)
printf("\n");
}
#endif
iavc_put_slice(sc, m->m_data, m->m_len);
if (m->m_next)
iavc_put_slice(sc, m->m_next->m_data, m->m_next->m_len);
}
return txlen;
}
static uint32_t
iavc_tx_ctrlmsg(iavc_softc_t *sc, struct mbuf *m)
{
uint32_t txlen = 0;
uint8_t *dmabuf;
if (sc->sc_dma) {
memcpy(sc->sc_sendbuf, m->m_data + 2, m->m_len - 2);
txlen = m->m_len - 2;
} else {
#if 0
{
u_int8_t *p = mtod(m, u_int8_t*) + 2;
int len;
printf("%s: tx BDC msg, len = %d, msg =", device_xname(sc->sc_dev),
m->m_len-2);
for (len = 0; len < m->m_len-2; len++) {
printf(" %02x", *p++);
if (len && (len % 16) == 0) printf("\n");
}
if (len % 16)
printf("\n");
}
#endif
/* no DMA */
txlen = m->m_len - 2;
dmabuf = mtod(m, char*) + 2;
while(txlen--)
b1io_put_byte(sc, *dmabuf++);
}
return txlen;
}
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