d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
1e2a1ebf2a
freebsd-skq/sys/dev/bwn/if_bwn_phy_n.c
landonf 6f4a9c1918 Introduce bwn(4) support for the bhnd(4) bus. 
Currently, bwn(4) relies on the siba_bwn(4) bus driver to provide support
for the on-chip SSB interconnect found in Broadcom's older PCI(e) Wi-Fi
adapters. Non-PCI Wi-Fi adapters, as well as the newer BCMA interconnect
found in post-2009 Broadcom Wi-Fi hardware, are not supported by
siba_bwn(4).

The bhnd(4) bus driver (also used by the FreeBSD/MIPS Broadcom port)
provides a unified kernel interface to a superset of the hardware supported
by siba_bwn; by attaching bwn(4) via bhnd(4), we can support both modern
PCI(e) Wi-Fi devices based on the BCMA backplane interconnect, as well as
Broadcom MIPS WiSoCs that include a D11 MAC core directly attached to their
SSB or BCMA backplane.

This diff introduces opt-in bwn(4) support for bhnd(4) by providing:

 - A small bwn(4) driver subclass, if_bwn_bhnd, that attaches via
   bhnd(4) instead of siba_bwn(4).
 - A bhndb(4)-based PCI host bridge driver, if_bwn_pci, that optionally
   probes at a higher priority than the siba_bwn(4) PCI driver.
 - A set of compatibility shims that perform translation of bwn(4)'s
   siba_bwn function calls into their bhnd(9) API equivalents when bwn(4)
   is attached via a bhnd(4) bus parent. When bwn(4) is attached via
   siba_bwn(4), all siba_bwn function calls are simply passed through to
   their original implementations.

To test bwn(4) with bhnd(4), place the following lines in loader.conf(5):

  hw.bwn_pci.preferred="1"

  if_bwn_pci_load="YES
  bwn_v4_ucode_load="YES"
  bwn_v4_lp_ucode_load="YES"

To verify that bwn(4) is using bhnd(4), you can check dmesg:

  bwn0: <Broadcom 802.11 MAC/PHY/Radio, rev 15> ... on bhnd0

... or devinfo(8):

pcib2
  pci2
    bwn_pci0
      bhndb0
        bhnd0
          bwn0
          ...

bwn(4)/bhnd(4) has been tested for regressions with most chipsets currently
supported by bwn(4), including:

  - BCM4312
  - BCM4318
  - BCM4321

With minimal changes to the DMA code (not included in this commit), I was
also able to test support for newer BCMA devices by bringing up basic
working Wi-Fi on two previously unsupported, BCMA-based N-PHY chipsets:

  - BCM43224
  - BCM43225

Approved by:	adrian (mentor, implicit)
Sponsored by:	The FreeBSD Foundation & Plausible Labs
Differential Revision:	https://reviews.freebsd.org/D13041
2017-12-02 02:21:27 +00:00

284 lines
5.8 KiB
C
Raw Blame History

/*-
* Copyright (c) 2016 Adrian Chadd <adrian@freebsd.org>
* 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,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
* redistribution must be conditioned upon including a substantially
* similar Disclaimer requirement for further binary redistribution.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* This is the top-level N-PHY support for the Broadcom softmac driver.
*/
#include "opt_bwn.h"
#include "opt_wlan.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/endian.h>
#include <sys/errno.h>
#include <sys/firmware.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_llc.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_radiotap.h>
#include <net80211/ieee80211_regdomain.h>
#include <net80211/ieee80211_phy.h>
#include <net80211/ieee80211_ratectl.h>
#include <dev/bwn/if_bwn_siba.h>
#include <dev/bwn/if_bwnreg.h>
#include <dev/bwn/if_bwnvar.h>
#include <dev/bwn/if_bwn_debug.h>
#include <dev/bwn/if_bwn_misc.h>
#include <dev/bwn/if_bwn_phy_n.h>
#ifdef BWN_GPL_PHY
#include <gnu/dev/bwn/phy_n/if_bwn_phy_n_tables.h>
#include <gnu/dev/bwn/phy_n/if_bwn_phy_n_ppr.h>
#include <gnu/dev/bwn/phy_n/if_bwn_phy_n_core.h>
#endif
/*
* This module is always compiled into the kernel, regardless of
* whether the GPL PHY is enabled. If the GPL PHY isn't enabled
* then it'll just be stubs that will fail to attach.
*/
int
bwn_phy_n_attach(struct bwn_mac *mac)
{
#ifdef BWN_GPL_PHY
return bwn_nphy_op_allocate(mac);
#else
device_printf(mac->mac_sc->sc_dev,
"%s: BWN_GPL_PHY not in kernel config; "
"no PHY-N support\n", __func__);
return (ENXIO);
#endif
}
void
bwn_phy_n_detach(struct bwn_mac *mac)
{
#ifdef BWN_GPL_PHY
return bwn_nphy_op_free(mac);
#endif
}
int
bwn_phy_n_prepare_hw(struct bwn_mac *mac)
{
#ifdef BWN_GPL_PHY
bwn_nphy_op_prepare_structs(mac);
return (0);
#else
return (ENXIO);
#endif
}
void
bwn_phy_n_init_pre(struct bwn_mac *mac)
{
/* XXX TODO */
}
int
bwn_phy_n_init(struct bwn_mac *mac)
{
#ifdef BWN_GPL_PHY
return bwn_nphy_op_init(mac);
#else
return (ENXIO);
#endif
}
void
bwn_phy_n_exit(struct bwn_mac *mac)
{
/* XXX TODO */
}
uint16_t
bwn_phy_n_read(struct bwn_mac *mac, uint16_t reg)
{
BWN_WRITE_2(mac, BWN_PHYCTL, reg);
return BWN_READ_2(mac, BWN_PHYDATA);
}
void
bwn_phy_n_write(struct bwn_mac *mac, uint16_t reg, uint16_t value)
{
BWN_WRITE_2(mac, BWN_PHYCTL, reg);
BWN_WRITE_2(mac, BWN_PHYDATA, value);
}
uint16_t
bwn_phy_n_rf_read(struct bwn_mac *mac, uint16_t reg)
{
/* Register 1 is a 32-bit register. */
if (mac->mac_phy.rev < 7 && reg == 1) {
BWN_ERRPRINTF(mac->mac_sc, "%s: bad reg access\n", __func__);
}
if (mac->mac_phy.rev >= 7)
reg |= 0x200; /* radio 0x2057 */
else
reg |= 0x100;
BWN_WRITE_2(mac, BWN_RFCTL, reg);
return BWN_READ_2(mac, BWN_RFDATALO);
}
void
bwn_phy_n_rf_write(struct bwn_mac *mac, uint16_t reg, uint16_t value)
{
/* Register 1 is a 32-bit register. */
if (mac->mac_phy.rev < 7 && reg == 1) {
BWN_ERRPRINTF(mac->mac_sc, "%s: bad reg access\n", __func__);
}
BWN_WRITE_2(mac, BWN_RFCTL, reg);
BWN_WRITE_2(mac, BWN_RFDATALO, value);
}
int
bwn_phy_n_hwpctl(struct bwn_mac *mac)
{
return (0);
}
void
bwn_phy_n_rf_onoff(struct bwn_mac *mac, int on)
{
#ifdef BWN_GPL_PHY
bwn_nphy_op_software_rfkill(mac, on);
#endif
}
void
bwn_phy_n_switch_analog(struct bwn_mac *mac, int on)
{
#ifdef BWN_GPL_PHY
bwn_nphy_op_switch_analog(mac, on);
#endif
}
int
bwn_phy_n_switch_channel(struct bwn_mac *mac, uint32_t newchan)
{
#ifdef BWN_GPL_PHY
return bwn_nphy_op_switch_channel(mac, newchan);
#else
return (ENXIO);
#endif
}
uint32_t
bwn_phy_n_get_default_chan(struct bwn_mac *mac)
{
if (bwn_current_band(mac) == BWN_BAND_2G)
return (1);
return (36);
}
void
bwn_phy_n_set_antenna(struct bwn_mac *mac, int antenna)
{
/* XXX TODO */
}
int
bwn_phy_n_im(struct bwn_mac *mac, int mode)
{
/* XXX TODO */
return (0);
}
bwn_txpwr_result_t
bwn_phy_n_recalc_txpwr(struct bwn_mac *mac, int ignore_tssi)
{
#ifdef BWN_GPL_PHY
return bwn_nphy_op_recalc_txpower(mac, ignore_tssi);
#else
return (BWN_TXPWR_RES_DONE);
#endif
}
void
bwn_phy_n_set_txpwr(struct bwn_mac *mac)
{
}
void
bwn_phy_n_task_15s(struct bwn_mac *mac)
{
}
void
bwn_phy_n_task_60s(struct bwn_mac *mac)
{
}
Reference in New Issue View Git Blame Copy Permalink