05a1f56fc9
Submitted by: Mark Santcroos <marks@ripe.net> Reviewed by: imp, dfr, bde
1063 lines
23 KiB
C
1063 lines
23 KiB
C
/*-
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* Granch SBNI16 G.SHDSL Modem driver
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* Written by Denis I. Timofeev, 2002-2003.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sockio.h>
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#include <sys/mbuf.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/socket.h>
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#include <sys/random.h>
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#include <machine/clock.h>
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#include <machine/stdarg.h>
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#include <net/if.h>
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#include <net/if_arp.h>
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#include <net/ethernet.h>
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#include <net/if_media.h>
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#include <net/bpf.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/sbsh/if_sbshreg.h>
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/* -------------------------------------------------------------------------- */
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struct sbni16_hw_regs {
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u_int8_t CR, CRB, SR, IMR, CTDR, LTDR, CRDR, LRDR;
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};
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struct hw_descr {
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u_int32_t address;
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u_int32_t length;
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};
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struct cx28975_cmdarea {
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u_int8_t intr_host;
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u_int8_t intr_8051;
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u_int8_t map_version;
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u_int8_t in_dest;
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u_int8_t in_opcode;
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u_int8_t in_zero;
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u_int8_t in_length;
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u_int8_t in_csum;
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u_int8_t in_data[75];
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u_int8_t in_datasum;
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u_int8_t out_dest;
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u_int8_t out_opcode;
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u_int8_t out_ack;
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u_int8_t out_length;
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u_int8_t out_csum;
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u_int8_t out_data[75];
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u_int8_t out_datasum;
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};
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#define XQLEN 8
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#define RQLEN 8
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struct sbsh_softc {
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struct arpcom arpcom; /* ethernet common */
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struct resource *mem_res;
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struct resource *irq_res;
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void *intr_hand;
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void *mem_base; /* mapped memory address */
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volatile struct sbni16_hw_regs *regs;
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volatile struct hw_descr *tbd;
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volatile struct hw_descr *rbd;
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volatile struct cx28975_cmdarea *cmdp;
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/* SBNI16 controller statistics */
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struct sbni16_stats {
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u_int32_t sent_pkts, rcvd_pkts;
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u_int32_t crc_errs, ufl_errs, ofl_errs, attempts, last_time;
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} in_stats;
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/* transmit and reception queues */
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struct mbuf *xq[XQLEN], *rq[RQLEN];
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unsigned head_xq, tail_xq, head_rq, tail_rq;
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/* the descriptors mapped onto the first buffers in xq and rq */
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unsigned head_tdesc, head_rdesc;
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u_int8_t state;
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};
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struct cx28975_cfg {
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u_int8_t *firmw_image;
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u_int32_t firmw_len;
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u_int32_t lrate: 10;
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u_int32_t master: 1;
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u_int32_t mod: 2;
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u_int32_t crc16: 1;
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u_int32_t fill_7e: 1;
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u_int32_t inv: 1;
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u_int32_t rburst: 1;
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u_int32_t wburst: 1;
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u_int32_t : 14;
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};
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/* SHDSL transceiver statistics */
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struct dsl_stats {
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u_int8_t status_1, status_3;
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u_int8_t attenuat, nmr, tpbo, rpbo;
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u_int16_t losw, segd, crc, sega, losd;
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};
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enum State { NOT_LOADED, DOWN, ACTIVATION, ACTIVE };
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#define SIOCLOADFIRMW _IOWR('i', 67, struct ifreq)
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#define SIOCGETSTATS _IOWR('i', 68, struct ifreq)
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#define SIOCCLRSTATS _IOWR('i', 69, struct ifreq)
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static int sbsh_probe(device_t);
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static int sbsh_attach(device_t);
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static int sbsh_detach(device_t);
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static int sbsh_ioctl(struct ifnet *, u_long, caddr_t);
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static void sbsh_shutdown(device_t);
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static int sbsh_suspend(device_t);
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static int sbsh_resume(device_t);
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static void sbsh_watchdog(struct ifnet *);
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static void sbsh_start(struct ifnet *);
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static void sbsh_init(void *);
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static void sbsh_stop(struct sbsh_softc *);
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static void init_card(struct sbsh_softc *);
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static void sbsh_intr(void *);
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static void resume_tx(struct sbsh_softc *);
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static void start_xmit_frames(struct sbsh_softc *);
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static void encap_frame(struct sbsh_softc *, struct mbuf *);
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static struct mbuf * repack(struct sbsh_softc *, struct mbuf *);
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static void free_sent_buffers(struct sbsh_softc *);
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static void alloc_rx_buffers(struct sbsh_softc *);
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static void indicate_frames(struct sbsh_softc *);
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static void drop_queues(struct sbsh_softc *);
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static void activate(struct sbsh_softc *);
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static void deactivate(struct sbsh_softc *);
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static void cx28975_interrupt(struct sbsh_softc *);
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static int start_cx28975(struct sbsh_softc *, struct cx28975_cfg);
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static int download_firmware(struct sbsh_softc *, u_int8_t *, u_int32_t);
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static int issue_cx28975_cmd(struct sbsh_softc *, u_int8_t,
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u_int8_t *, u_int8_t);
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static device_method_t sbsh_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, sbsh_probe),
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DEVMETHOD(device_attach, sbsh_attach),
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DEVMETHOD(device_detach, sbsh_detach),
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DEVMETHOD(device_shutdown, sbsh_shutdown),
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DEVMETHOD(device_suspend, sbsh_suspend),
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DEVMETHOD(device_resume, sbsh_resume),
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{ 0, 0 }
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};
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static driver_t sbsh_driver = {
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"sbsh",
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sbsh_methods,
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sizeof(struct sbsh_softc)
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};
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static devclass_t sbsh_devclass;
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DRIVER_MODULE(sbsh, pci, sbsh_driver, sbsh_devclass, 0, 0);
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MODULE_DEPEND(sbsh, pci, 1, 1, 1);
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static int
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sbsh_probe(device_t dev)
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{
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if (pci_get_vendor(dev) != SBNI16_VENDOR
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|| pci_get_device(dev) != SBNI16_DEVICE
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|| pci_get_subdevice(dev) != SBNI16_SUBDEV)
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return (ENXIO);
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device_set_desc(dev, "Granch SBNI16 G.SHDSL Modem");
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return (0);
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}
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static int
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sbsh_attach(device_t dev)
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{
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struct sbsh_softc *sc;
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struct ifnet *ifp;
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int unit, error = 0, rid, s;
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s = splimp();
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sc = device_get_softc(dev);
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unit = device_get_unit(dev);
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rid = PCIR_BAR(1);
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sc->mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
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0, ~0, 4096, RF_ACTIVE);
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if (sc->mem_res == NULL) {
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printf ("sbsh%d: couldn't map memory\n", unit);
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error = ENXIO;
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goto fail;
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}
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rid = 0;
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sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
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RF_SHAREABLE | RF_ACTIVE);
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if (sc->irq_res == NULL) {
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printf("sbsh%d: couldn't map interrupt\n", unit);
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bus_release_resource(dev, SYS_RES_MEMORY,
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PCIR_BAR(1), sc->mem_res);
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error = ENXIO;
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goto fail;
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}
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sc->mem_base = rman_get_virtual(sc->mem_res);
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init_card(sc);
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error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET,
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sbsh_intr, sc, &sc->intr_hand);
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if (error) {
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bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
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bus_release_resource(dev, SYS_RES_MEMORY,
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PCIR_BAR(1), sc->mem_res);
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printf("sbsh%d: couldn't set up irq\n", unit);
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goto fail;
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}
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/* generate ethernet MAC address */
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*(u_int32_t *)sc->arpcom.ac_enaddr = htonl(0x00ff0192);
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read_random(sc->arpcom.ac_enaddr + 4, 2);
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ifp = &sc->arpcom.ac_if;
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ifp->if_softc = sc;
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if_initname(ifp, device_get_name(dev), device_get_unit(dev));
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ifp->if_mtu = ETHERMTU;
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ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
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ifp->if_ioctl = sbsh_ioctl;
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ifp->if_output = ether_output;
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ifp->if_start = sbsh_start;
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ifp->if_watchdog = sbsh_watchdog;
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ifp->if_init = sbsh_init;
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ifp->if_baudrate = 4600000;
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ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
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ether_ifattach(ifp, sc->arpcom.ac_enaddr);
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fail:
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splx(s);
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return (error);
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}
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static int
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sbsh_detach(device_t dev)
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{
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struct sbsh_softc *sc;
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struct ifnet *ifp;
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int s;
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s = splimp();
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sc = device_get_softc(dev);
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ifp = &sc->arpcom.ac_if;
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sbsh_stop(sc);
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ether_ifdetach(ifp);
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bus_teardown_intr(dev, sc->irq_res, sc->intr_hand);
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bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
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bus_release_resource(dev, SYS_RES_MEMORY, PCIR_BAR(1), sc->mem_res);
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splx(s);
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return (0);
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}
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static void
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sbsh_start(struct ifnet *ifp)
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{
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struct sbsh_softc *sc = ifp->if_softc;
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int s;
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if (sc->state != ACTIVE)
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return;
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s = splimp();
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start_xmit_frames(ifp->if_softc);
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splx(s);
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}
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static void
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sbsh_init(void *xsc)
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{
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struct sbsh_softc *sc = xsc;
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struct ifnet *ifp = &sc->arpcom.ac_if;
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int s;
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u_int8_t t;
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if ((ifp->if_flags & IFF_RUNNING) || sc->state == NOT_LOADED)
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return;
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s = splimp();
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bzero(&sc->in_stats, sizeof(struct sbni16_stats));
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sc->head_xq = sc->tail_xq = sc->head_rq = sc->tail_rq = 0;
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sc->head_tdesc = sc->head_rdesc = 0;
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sc->regs->IMR = EXT;
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t = 2;
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issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1);
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if (issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1) == 0) {
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sc->state = ACTIVATION;
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ifp->if_flags |= IFF_RUNNING;
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ifp->if_flags &= ~IFF_OACTIVE;
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}
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splx(s);
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}
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static void
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sbsh_stop(struct sbsh_softc *sc)
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{
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int s;
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u_int8_t t;
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s = splimp();
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sc->regs->IMR = EXT;
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t = 0;
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issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1);
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if (sc->state == ACTIVE) {
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t = 1;
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issue_cx28975_cmd(sc, _DSL_FORCE_DEACTIVATE, &t, 1);
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/* FIX! activation manager state */
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/* Is it really must be done here? It calls from intr handler */
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deactivate(sc);
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}
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sc->regs->IMR = 0;
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sc->state = DOWN;
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splx(s);
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}
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static void
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init_card(struct sbsh_softc *sc)
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{
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sc->state = NOT_LOADED;
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sc->tbd = (struct hw_descr *) sc->mem_base;
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sc->rbd = (struct hw_descr *) ((u_int8_t *)sc->mem_base + 0x400);
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sc->regs = (struct sbni16_hw_regs *) ((u_int8_t *)sc->mem_base + 0x800);
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sc->cmdp = (struct cx28975_cmdarea *) ((u_int8_t *)sc->mem_base + 0xc00);
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sc->regs->CR = 0;
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sc->regs->SR = 0xff;
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sc->regs->IMR = 0;
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}
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static int
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sbsh_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
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{
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struct sbsh_softc *sc = ifp->if_softc;
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struct ifreq *ifr = (struct ifreq *) data;
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struct cx28975_cfg cfg;
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struct dsl_stats ds;
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int s, error = 0;
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u_int8_t t;
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s = splimp();
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switch(cmd) {
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case SIOCLOADFIRMW:
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if ((error = suser(curthread)) != 0)
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break;
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if (ifp->if_flags & IFF_UP)
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error = EBUSY;
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bcopy((caddr_t)ifr->ifr_data, (caddr_t)&cfg, sizeof cfg);
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if (start_cx28975(sc, cfg) == 0) {
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static char *modstr[] = {
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"TCPAM32", "TCPAM16", "TCPAM8", "TCPAM4" };
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if_printf(&sc->arpcom.ac_if, "%s, rate %d, %s\n",
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cfg.master ? "master" : "slave",
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cfg.lrate << 3, modstr[cfg.mod]);
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} else {
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if_printf(&sc->arpcom.ac_if,
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"unable to load firmware\n");
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error = EIO;
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}
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break;
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case SIOCGETSTATS :
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if ((error = suser(curthread)) != 0)
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break;
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t = 0;
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if (issue_cx28975_cmd(sc, _DSL_FAR_END_ATTEN, &t, 1))
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error = EIO;
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ds.attenuat = sc->cmdp->out_data[0];
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if (issue_cx28975_cmd(sc, _DSL_NOISE_MARGIN, &t, 1))
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error = EIO;
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ds.nmr = sc->cmdp->out_data[0];
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if (issue_cx28975_cmd(sc, _DSL_POWER_BACK_OFF_RESULT, &t, 1))
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error = EIO;
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ds.tpbo = sc->cmdp->out_data[0];
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ds.rpbo = sc->cmdp->out_data[1];
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if (!issue_cx28975_cmd(sc, _DSL_HDSL_PERF_ERR_CTRS, &t, 1)) {
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int i;
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for (i = 0; i < 10; ++i)
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((u_int8_t *) &ds.losw)[i] =
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sc->cmdp->out_data[i];
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} else
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error = EIO;
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ds.status_1 = ((volatile u_int8_t *)sc->cmdp)[0x3c0];
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ds.status_3 = ((volatile u_int8_t *)sc->cmdp)[0x3c2];
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bcopy(&sc->in_stats, ifr->ifr_data, sizeof(struct sbni16_stats));
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bcopy(&ds, ifr->ifr_data + sizeof(struct sbni16_stats),
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sizeof(struct dsl_stats));
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break;
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case SIOCCLRSTATS :
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if (!(error = suser(curthread))) {
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bzero(&sc->in_stats, sizeof(struct sbni16_stats));
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t = 2;
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if (issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1))
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error = EIO;
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}
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break;
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case SIOCSIFFLAGS:
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if (ifp->if_flags & IFF_UP) {
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if (!(ifp->if_flags & IFF_RUNNING)) {
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if (sc->state == NOT_LOADED) {
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if_printf(ifp, "firmware wasn't loaded\n");
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error = EBUSY;
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} else
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sbsh_init(sc);
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}
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} else {
|
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if (ifp->if_flags & IFF_RUNNING) {
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sbsh_stop(sc);
|
|
ifp->if_flags &= ~IFF_RUNNING;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
error = 0;
|
|
break;
|
|
|
|
default:
|
|
error = ether_ioctl(ifp, cmd, data);
|
|
break;
|
|
}
|
|
|
|
splx(s);
|
|
return (error);
|
|
}
|
|
|
|
|
|
static void
|
|
sbsh_shutdown(device_t dev)
|
|
{
|
|
struct sbsh_softc *sc = device_get_softc(dev);
|
|
|
|
sbsh_stop(sc);
|
|
}
|
|
|
|
static int
|
|
sbsh_suspend(device_t dev)
|
|
{
|
|
struct sbsh_softc *sc = device_get_softc(dev);
|
|
int s;
|
|
|
|
s = splimp();
|
|
sbsh_stop(sc);
|
|
splx(s);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sbsh_resume(device_t dev)
|
|
{
|
|
struct sbsh_softc *sc = device_get_softc(dev);
|
|
struct ifnet *ifp;
|
|
int s;
|
|
|
|
s = splimp();
|
|
ifp = &sc->arpcom.ac_if;
|
|
|
|
if (ifp->if_flags & IFF_UP)
|
|
sbsh_init(sc);
|
|
|
|
splx(s);
|
|
return (0);
|
|
}
|
|
|
|
|
|
static void
|
|
sbsh_watchdog(struct ifnet *ifp)
|
|
{
|
|
struct sbsh_softc *sc = ifp->if_softc;
|
|
|
|
if_printf(ifp, "transmit timeout\n");
|
|
|
|
if (sc->regs->SR & TXS) {
|
|
sc->regs->SR = TXS;
|
|
if_printf(ifp, "interrupt posted but not delivered\n");
|
|
}
|
|
free_sent_buffers(sc);
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
static void
|
|
sbsh_intr(void *arg)
|
|
{
|
|
struct sbsh_softc *sc = (struct sbsh_softc *)arg;
|
|
u_int8_t status = sc->regs->SR;
|
|
|
|
if (status == 0)
|
|
return;
|
|
|
|
if (status & EXT) {
|
|
cx28975_interrupt(sc);
|
|
sc->regs->SR = EXT;
|
|
}
|
|
|
|
if (status & UFL) {
|
|
resume_tx(sc);
|
|
sc->regs->SR = UFL;
|
|
++sc->in_stats.ufl_errs;
|
|
++sc->arpcom.ac_if.if_oerrors;
|
|
}
|
|
|
|
if (status & RXS) {
|
|
sc->regs->SR = RXS;
|
|
indicate_frames(sc);
|
|
alloc_rx_buffers(sc);
|
|
}
|
|
|
|
if (status & TXS) {
|
|
sc->regs->SR = TXS;
|
|
free_sent_buffers(sc);
|
|
}
|
|
|
|
if (status & CRC) {
|
|
++sc->in_stats.crc_errs;
|
|
++sc->arpcom.ac_if.if_ierrors;
|
|
sc->regs->SR = CRC;
|
|
}
|
|
|
|
if (status & OFL) {
|
|
++sc->in_stats.ofl_errs;
|
|
++sc->arpcom.ac_if.if_ierrors;
|
|
sc->regs->SR = OFL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Look for a first descriptor of a next packet, and write it's number
|
|
* into CTDR. Then enable the transmitter.
|
|
*/
|
|
static void
|
|
resume_tx(struct sbsh_softc *sc)
|
|
{
|
|
u_int32_t cur_tbd = sc->regs->CTDR;
|
|
|
|
while (cur_tbd != sc->regs->LTDR
|
|
&& (sc->tbd[cur_tbd++].length & LAST_FRAG) == 0)
|
|
;
|
|
sc->regs->CTDR = cur_tbd;
|
|
sc->regs->CR |= TXEN;
|
|
}
|
|
|
|
static void
|
|
start_xmit_frames(struct sbsh_softc *sc)
|
|
{
|
|
struct ifnet *ifp = &sc->arpcom.ac_if;
|
|
struct mbuf *m;
|
|
|
|
/*
|
|
* Check if we have any free descriptor(s) and free space in
|
|
* our transmit queue.
|
|
*/
|
|
while (sc->tail_xq != ((sc->head_xq - 1) & (XQLEN - 1))
|
|
&& sc->regs->LTDR != ((sc->head_tdesc - 1) & 0x7f)) {
|
|
|
|
IF_DEQUEUE(&ifp->if_snd, m);
|
|
if (!m)
|
|
break;
|
|
if (m->m_pkthdr.len) {
|
|
BPF_MTAP(ifp, m);
|
|
encap_frame(sc, m);
|
|
} else
|
|
m_freem(m);
|
|
}
|
|
|
|
if (sc->regs->CTDR != sc->regs->LTDR)
|
|
ifp->if_flags |= IFF_OACTIVE;
|
|
else
|
|
ifp->if_flags &= ~IFF_OACTIVE;
|
|
}
|
|
|
|
|
|
/*
|
|
* MUST be called at splimp
|
|
*/
|
|
static void
|
|
encap_frame(struct sbsh_softc *sc, struct mbuf *m_head)
|
|
{
|
|
struct mbuf *m;
|
|
u_int32_t cur_tbd;
|
|
int done;
|
|
|
|
look_for_nonzero:
|
|
for (m = m_head; !m->m_len; m = m->m_next)
|
|
;
|
|
|
|
cur_tbd = sc->regs->LTDR & 0x7f;
|
|
done = 0;
|
|
do {
|
|
if (m->m_len < 5 || cur_tbd == ((sc->head_tdesc - 1) & 0x7f)) {
|
|
if ((m_head = repack(sc, m_head)) != NULL)
|
|
goto look_for_nonzero;
|
|
else
|
|
return;
|
|
}
|
|
|
|
sc->tbd[cur_tbd].address = vtophys(mtod(m, vm_offset_t));
|
|
sc->tbd[cur_tbd].length = m->m_len;
|
|
|
|
do {
|
|
m = m->m_next;
|
|
} while (m && !m->m_len);
|
|
|
|
if (!m) { /* last fragment has been reached */
|
|
sc->tbd[cur_tbd].length |= LAST_FRAG;
|
|
done = 1;
|
|
}
|
|
|
|
++cur_tbd;
|
|
cur_tbd &= 0x7f;
|
|
} while (!done);
|
|
|
|
sc->xq[sc->tail_xq++] = m_head;
|
|
sc->tail_xq &= (XQLEN - 1);
|
|
|
|
sc->regs->LTDR = cur_tbd;
|
|
++sc->in_stats.sent_pkts;
|
|
++sc->arpcom.ac_if.if_opackets;
|
|
}
|
|
|
|
static struct mbuf *
|
|
repack(struct sbsh_softc *sc, struct mbuf *m)
|
|
{
|
|
struct mbuf *m_new;
|
|
|
|
MGETHDR(m_new, M_DONTWAIT, MT_DATA);
|
|
if (!m_new) {
|
|
if_printf (&sc->arpcom.ac_if,
|
|
"unable to get mbuf.\n");
|
|
return (NULL);
|
|
}
|
|
|
|
if (m->m_pkthdr.len > MHLEN) {
|
|
MCLGET(m_new, M_DONTWAIT);
|
|
if (!(m_new->m_flags & M_EXT)) {
|
|
m_freem(m_new);
|
|
if_printf (&sc->arpcom.ac_if,
|
|
"unable to get mbuf cluster.\n");
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
m_copydata(m, 0, m->m_pkthdr.len, mtod(m_new, caddr_t));
|
|
m_new->m_pkthdr.len = m_new->m_len = m->m_pkthdr.len;
|
|
m_freem(m);
|
|
return (m_new);
|
|
}
|
|
|
|
static void
|
|
free_sent_buffers(struct sbsh_softc *sc)
|
|
{
|
|
u_int32_t cur_tbd;
|
|
|
|
cur_tbd = sc->regs->CTDR;
|
|
|
|
while (sc->head_tdesc != cur_tbd) {
|
|
/*
|
|
* Be careful! one element in xq may correspond to
|
|
* multiple descriptors.
|
|
*/
|
|
if (sc->tbd[sc->head_tdesc].length & LAST_FRAG) {
|
|
m_freem(sc->xq[sc->head_xq++]);
|
|
sc->head_xq &= (XQLEN - 1);
|
|
}
|
|
|
|
sc->tbd[sc->head_tdesc].length = 0;
|
|
sc->head_tdesc = (sc->head_tdesc + 1) & 0x7f;
|
|
}
|
|
|
|
start_xmit_frames(sc);
|
|
}
|
|
|
|
/*
|
|
* DON'T use free_sent_buffers to drop the queue!
|
|
*/
|
|
static void
|
|
alloc_rx_buffers(struct sbsh_softc *sc)
|
|
{
|
|
unsigned cur_rbd = sc->regs->LRDR & 0x7f;
|
|
struct mbuf *m;
|
|
|
|
while (sc->tail_rq != ((sc->head_rq - 1) & (RQLEN - 1))) {
|
|
MGETHDR(m, M_DONTWAIT, MT_DATA);
|
|
if (!m) {
|
|
if_printf (&sc->arpcom.ac_if,
|
|
"unable to get mbuf.\n");
|
|
return;
|
|
}
|
|
|
|
if (SBNI16_MAX_FRAME > MHLEN) {
|
|
MCLGET(m, M_DONTWAIT);
|
|
if (!(m->m_flags & M_EXT)) {
|
|
m_freem(m);
|
|
if_printf (&sc->arpcom.ac_if,
|
|
"unable to get mbuf cluster.\n");
|
|
return;
|
|
}
|
|
m->m_pkthdr.len = m->m_len = MCLBYTES;
|
|
}
|
|
|
|
m_adj(m, 2); /* align ip on longword boundaries */
|
|
|
|
sc->rq[sc->tail_rq++] = m;
|
|
sc->tail_rq &= (RQLEN - 1);
|
|
|
|
sc->rbd[cur_rbd].address = vtophys(mtod(m, vm_offset_t));
|
|
sc->rbd[cur_rbd].length = 0;
|
|
sc->regs->LRDR = cur_rbd = (cur_rbd + 1) & 0x7f;
|
|
}
|
|
}
|
|
|
|
static void
|
|
indicate_frames(struct sbsh_softc *sc)
|
|
{
|
|
unsigned cur_rbd = sc->regs->CRDR & 0x7f;
|
|
|
|
while (sc->head_rdesc != cur_rbd) {
|
|
struct mbuf *m = sc->rq[sc->head_rq++];
|
|
sc->head_rq &= (RQLEN - 1);
|
|
|
|
m->m_pkthdr.len = m->m_len =
|
|
sc->rbd[sc->head_rdesc].length & 0x7ff;
|
|
m->m_pkthdr.rcvif = &sc->arpcom.ac_if;
|
|
|
|
(*sc->arpcom.ac_if.if_input)(&sc->arpcom.ac_if, m);
|
|
++sc->in_stats.rcvd_pkts;
|
|
++sc->arpcom.ac_if.if_ipackets;
|
|
|
|
sc->head_rdesc = (sc->head_rdesc + 1) & 0x7f;
|
|
}
|
|
}
|
|
|
|
static void
|
|
drop_queues(struct sbsh_softc *sc)
|
|
{
|
|
while (sc->head_rq != sc->tail_rq) {
|
|
m_freem(sc->rq[sc->head_rq++]);
|
|
sc->head_rq &= (RQLEN - 1);
|
|
}
|
|
|
|
while (sc->head_xq != sc->tail_xq) {
|
|
m_freem(sc->xq[sc->head_xq++]);
|
|
sc->head_xq &= (XQLEN - 1);
|
|
}
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
static void
|
|
activate(struct sbsh_softc *sc)
|
|
{
|
|
struct timeval tv;
|
|
|
|
sc->regs->SR = 0xff; /* clear it! */
|
|
sc->regs->CTDR = sc->regs->LTDR = sc->regs->CRDR = sc->regs->LRDR = 0;
|
|
|
|
sc->head_tdesc = sc->head_rdesc = 0;
|
|
alloc_rx_buffers(sc);
|
|
|
|
sc->regs->CRB &= ~RXDE;
|
|
sc->regs->IMR = EXT | RXS | TXS | CRC | OFL | UFL;
|
|
sc->regs->CR |= TXEN | RXEN;
|
|
|
|
sc->state = ACTIVE;
|
|
++sc->in_stats.attempts;
|
|
microtime(&tv);
|
|
sc->in_stats.last_time = tv.tv_sec;
|
|
start_xmit_frames(sc);
|
|
}
|
|
|
|
static void
|
|
deactivate(struct sbsh_softc *sc)
|
|
{
|
|
sc->regs->CR &= ~(RXEN | TXEN);
|
|
sc->regs->CRB |= RXDE;
|
|
sc->regs->IMR = EXT;
|
|
sc->regs->CTDR = sc->regs->LTDR;
|
|
sc->regs->CRDR = sc->regs->LRDR;
|
|
sc->state = ACTIVATION;
|
|
|
|
drop_queues(sc);
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
static void
|
|
cx28975_interrupt(struct sbsh_softc *sc)
|
|
{
|
|
volatile struct cx28975_cmdarea *p = sc->cmdp;
|
|
u_int8_t t;
|
|
|
|
if (p->intr_host != 0xfe)
|
|
return;
|
|
|
|
if (p->out_ack & 0x80) {
|
|
if (*((volatile u_int8_t *)p + 0x3c7) & 2) {
|
|
if (sc->state != ACTIVE
|
|
&& (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) == 0x40) {
|
|
activate(sc);
|
|
if_printf(&sc->arpcom.ac_if, "connected to peer\n");
|
|
} else if (sc->state == ACTIVE
|
|
&& (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) != 0x40) {
|
|
deactivate(sc);
|
|
if_printf(&sc->arpcom.ac_if, "carrier lost\n");
|
|
}
|
|
}
|
|
|
|
p->intr_host = 0;
|
|
t = p->intr_host;
|
|
p->out_ack = 0;
|
|
} else {
|
|
wakeup(sc);
|
|
|
|
p->intr_host = 0;
|
|
t = p->intr_host;
|
|
}
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
static int
|
|
start_cx28975(struct sbsh_softc *sc, struct cx28975_cfg cfg)
|
|
{
|
|
static char thresh[] = { +8, -4, -16, -40 };
|
|
|
|
volatile struct cx28975_cmdarea *p = sc->cmdp;
|
|
u_int8_t t, parm[12];
|
|
|
|
p->intr_host = 0;
|
|
t = p->intr_host;
|
|
|
|
/* reset chip set */
|
|
sc->regs->IMR = EXT;
|
|
sc->regs->CR = 0;
|
|
sc->regs->SR = 0xff;
|
|
DELAY(2);
|
|
sc->regs->CR = XRST;
|
|
if (cfg.crc16)
|
|
sc->regs->CR |= CMOD;
|
|
if (cfg.fill_7e)
|
|
sc->regs->CR |= FMOD;
|
|
if (cfg.inv)
|
|
sc->regs->CR |= PMOD;
|
|
|
|
sc->regs->CRB |= RODD | RXDE;
|
|
if (cfg.rburst)
|
|
sc->regs->CRB |= RDBE;
|
|
if (cfg.wburst)
|
|
sc->regs->CRB |= WTBE;
|
|
|
|
tsleep(sc, PWAIT, "sbsh", 0);
|
|
if ((p->out_ack & 0x1f) != _ACK_BOOT_WAKE_UP)
|
|
return (-1);
|
|
|
|
if (download_firmware(sc, cfg.firmw_image, cfg.firmw_len))
|
|
return (-1);
|
|
|
|
tsleep(sc, PWAIT, "sbsh", 0);
|
|
if ((p->out_ack & 0x1f) != _ACK_OPER_WAKE_UP)
|
|
return (-1);
|
|
|
|
t = cfg.master ? 1 : 9;
|
|
if (issue_cx28975_cmd(sc, _DSL_SYSTEM_ENABLE, &t, 1))
|
|
return (-1);
|
|
|
|
t = 0x63;
|
|
if (issue_cx28975_cmd(sc, _DSL_SYSTEM_CONFIG, &t, 1))
|
|
return (-1);
|
|
|
|
*(u_int16_t *)parm = cfg.lrate >> 3;
|
|
parm[2] = parm[3] = parm[0];
|
|
parm[5] = cfg.lrate & 7;
|
|
parm[4] = parm[7] = 1;
|
|
parm[6] = 0;
|
|
if (issue_cx28975_cmd(sc, _DSL_MULTI_RATE_CONFIG, parm, 8))
|
|
return (-1);
|
|
|
|
parm[0] = 0x02 | (cfg.mod << 4);
|
|
parm[1] = 0;
|
|
if (issue_cx28975_cmd(sc, _DSL_TRAINING_MODE, parm, 2))
|
|
return (-1);
|
|
|
|
bzero(parm, 12);
|
|
parm[0] = 0x04; /* pre-activation: G.hs */
|
|
parm[4] = 0x04; /* no remote configuration */
|
|
parm[7] = 0x01; /* annex A (default) */
|
|
parm[8] = 0xff; /* i-bit mask (all bits) */
|
|
if (issue_cx28975_cmd(sc, _DSL_PREACTIVATION_CFG, parm, 12))
|
|
return (-1);
|
|
|
|
parm[0] = 0x03; /* dying gasp time - 3 frames */
|
|
parm[1] = thresh[cfg.mod];
|
|
parm[2] = 0xff; /* attenuation */
|
|
parm[3] = 0x04; /* line probe NMR (+2 dB) */
|
|
parm[4] = 0x00; /* reserved */
|
|
parm[5] = 0x00;
|
|
if (issue_cx28975_cmd(sc, _DSL_THRESHOLDS, parm, 6))
|
|
return (-1);
|
|
|
|
t = cfg.master ? 0x23 : 0x21;
|
|
if (issue_cx28975_cmd(sc, _DSL_FR_PCM_CONFIG, &t, 1))
|
|
return (-1);
|
|
|
|
t = 0x02;
|
|
if (issue_cx28975_cmd(sc, _DSL_INTR_HOST_MASK, &t, 1))
|
|
return (-1);
|
|
|
|
sc->state = DOWN;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
download_firmware(struct sbsh_softc *sc, u_int8_t *img, u_int32_t img_len)
|
|
{
|
|
u_int32_t t;
|
|
int i;
|
|
u_int8_t cksum = 0;
|
|
|
|
for (i = 0; i < img_len; ++i)
|
|
cksum += img[i];
|
|
|
|
t = img_len;
|
|
if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_START, (u_int8_t *) &t, 4))
|
|
return (-1);
|
|
|
|
for (i = 0; img_len >= 75; i += 75, img_len -= 75) {
|
|
if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, 75))
|
|
return (-1);
|
|
}
|
|
|
|
if (img_len
|
|
&& issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, img_len))
|
|
return (-1);
|
|
|
|
t = (cksum ^ 0xff) + 1;
|
|
if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_END, (u_int8_t *) &t, 1))
|
|
return (-1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
issue_cx28975_cmd(struct sbsh_softc *sc, u_int8_t cmd,
|
|
u_int8_t *data, u_int8_t size)
|
|
{
|
|
volatile struct cx28975_cmdarea *p = sc->cmdp;
|
|
u_int8_t *databuf = p->in_data;
|
|
int i;
|
|
|
|
u_int8_t cksum = 0;
|
|
|
|
p->in_dest = 0xf0;
|
|
p->in_opcode = cmd;
|
|
p->in_zero = 0;
|
|
p->in_length = --size;
|
|
p->in_csum = 0xf0 ^ cmd ^ size ^ 0xaa;
|
|
|
|
for (i = 0; i <= size; ++i) {
|
|
cksum ^= *data;
|
|
*databuf++ = *data++; /* only 1 byte per cycle! */
|
|
}
|
|
|
|
p->in_datasum = cksum ^ 0xaa;
|
|
p->out_ack = _ACK_NOT_COMPLETE;
|
|
p->intr_8051 = 0xfe;
|
|
|
|
if (tsleep(sc, PWAIT, "sbsh", hz << 3))
|
|
return (-1);
|
|
|
|
while (p->out_ack == _ACK_NOT_COMPLETE)
|
|
; /* FIXME ! */
|
|
|
|
if ((p->out_ack & 0x1f) == _ACK_PASS) {
|
|
p->out_ack = 0;
|
|
return (0);
|
|
} else {
|
|
p->out_ack = 0;
|
|
return (-1);
|
|
}
|
|
}
|