freebsd-dev/sys/dev/rtwn/rtl8192c/r92c_fw.c

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/* $OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $ */
/*-
* Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
* Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org>
* Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_wlan.h"
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/taskqueue.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/linker.h>
#include <net/if.h>
#include <net/ethernet.h>
#include <net/if_media.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_radiotap.h>
#include <net80211/ieee80211_ratectl.h>
#include <dev/rtwn/if_rtwnreg.h>
#include <dev/rtwn/if_rtwnvar.h>
#include <dev/rtwn/if_rtwn_debug.h>
#include <dev/rtwn/if_rtwn_ridx.h>
#include <dev/rtwn/if_rtwn_rx.h>
#include <dev/rtwn/if_rtwn_task.h>
#include <dev/rtwn/if_rtwn_tx.h>
#include <dev/rtwn/rtl8192c/r92c.h>
#include <dev/rtwn/rtl8192c/r92c_reg.h>
#include <dev/rtwn/rtl8192c/r92c_var.h>
#include <dev/rtwn/rtl8192c/r92c_fw_cmd.h>
#include <dev/rtwn/rtl8192c/r92c_tx_desc.h>
#ifndef RTWN_WITHOUT_UCODE
static int
r92c_fw_cmd(struct rtwn_softc *sc, uint8_t id, const void *buf, int len)
{
struct r92c_fw_cmd cmd;
int ntries, error;
KASSERT(len <= sizeof(cmd.msg),
("%s: firmware command too long (%d > %zu)\n",
__func__, len, sizeof(cmd.msg)));
if (!(sc->sc_flags & RTWN_FW_LOADED)) {
RTWN_DPRINTF(sc, RTWN_DEBUG_FIRMWARE, "%s: firmware "
"was not loaded; command (id %u) will be discarded\n",
__func__, id);
return (0);
}
/* Wait for current FW box to be empty. */
for (ntries = 0; ntries < 50; ntries++) {
if (!(rtwn_read_1(sc, R92C_HMETFR) & (1 << sc->fwcur)))
break;
rtwn_delay(sc, 2000);
}
if (ntries == 100) {
device_printf(sc->sc_dev,
"could not send firmware command\n");
return (ETIMEDOUT);
}
memset(&cmd, 0, sizeof(cmd));
cmd.id = id;
if (len > 3) {
/* Ext command: [id : byte2 : byte3 : byte4 : byte0 : byte1] */
cmd.id |= R92C_CMD_FLAG_EXT;
memcpy(cmd.msg, (const uint8_t *)buf + 2, len - 2);
memcpy(cmd.msg + 3, buf, 2);
} else
memcpy(cmd.msg, buf, len);
/* Write the first word last since that will trigger the FW. */
if (len > 3) {
error = rtwn_write_2(sc, R92C_HMEBOX_EXT(sc->fwcur),
*(uint16_t *)((uint8_t *)&cmd + 4));
if (error != 0)
return (error);
}
error = rtwn_write_4(sc, R92C_HMEBOX(sc->fwcur),
*(uint32_t *)&cmd);
if (error != 0)
return (error);
sc->fwcur = (sc->fwcur + 1) % R92C_H2C_NBOX;
return (0);
}
void
r92c_fw_reset(struct rtwn_softc *sc, int reason)
{
int ntries;
if (reason == RTWN_FW_RESET_CHECKSUM)
return;
/* Tell 8051 to reset itself. */
rtwn_write_1(sc, R92C_HMETFR + 3, 0x20);
/* Wait until 8051 resets by itself. */
for (ntries = 0; ntries < 100; ntries++) {
if ((rtwn_read_2(sc, R92C_SYS_FUNC_EN) &
R92C_SYS_FUNC_EN_CPUEN) == 0)
return;
rtwn_delay(sc, 50);
}
/* Force 8051 reset. */
rtwn_setbits_1_shift(sc, R92C_SYS_FUNC_EN,
R92C_SYS_FUNC_EN_CPUEN, 0, 1);
}
void
r92c_fw_download_enable(struct rtwn_softc *sc, int enable)
{
if (enable) {
/* 8051 enable. */
rtwn_setbits_1_shift(sc, R92C_SYS_FUNC_EN, 0,
R92C_SYS_FUNC_EN_CPUEN, 1);
/* MCU firmware download enable. */
rtwn_setbits_1(sc, R92C_MCUFWDL, 0, R92C_MCUFWDL_EN);
/* 8051 reset. */
rtwn_setbits_1_shift(sc, R92C_MCUFWDL, R92C_MCUFWDL_ROM_DLEN,
0, 2);
} else {
/* MCU download disable. */
rtwn_setbits_1(sc, R92C_MCUFWDL, R92C_MCUFWDL_EN, 0);
/* Reserved for f/w extension. */
rtwn_write_1(sc, R92C_MCUFWDL + 1, 0);
}
}
#endif
/*
* Initialize firmware rate adaptation.
*/
#ifndef RTWN_WITHOUT_UCODE
static int
r92c_send_ra_cmd(struct rtwn_softc *sc, int macid, uint32_t rates,
int maxrate)
{
struct r92c_fw_cmd_macid_cfg cmd;
uint8_t mode;
int error = 0;
/* XXX should be called directly from iv_newstate() for MACID_BC */
/* XXX joinbss, not send_ra_cmd() */
#ifdef RTWN_TODO
/* NB: group addressed frames are done at 11bg rates for now */
if (ic->ic_curmode == IEEE80211_MODE_11B)
mode = R92C_RAID_11B;
else
mode = R92C_RAID_11BG;
/* XXX misleading 'mode' value here for unicast frames */
RTWN_DPRINTF(sc, RTWN_DEBUG_RA,
"%s: mode 0x%x, rates 0x%08x, basicrates 0x%08x\n", __func__,
mode, rates, basicrates);
/* Set rates mask for group addressed frames. */
cmd.macid = RTWN_MACID_BC | R92C_CMD_MACID_VALID;
cmd.mask = htole32(mode << 28 | basicrates);
error = rtwn_fw_cmd(sc, R92C_CMD_MACID_CONFIG, &cmd, sizeof(cmd));
if (error != 0) {
device_printf(sc->sc_dev,
"could not set RA mask for broadcast station\n");
return (error);
}
#endif
/* Set rates mask for unicast frames. */
if (maxrate >= RTWN_RIDX_MCS(0))
mode = R92C_RAID_11GN;
else if (maxrate >= RTWN_RIDX_OFDM6)
mode = R92C_RAID_11BG;
else
mode = R92C_RAID_11B;
cmd.macid = macid | R92C_CMD_MACID_VALID;
cmd.mask = htole32(mode << 28 | rates);
error = r92c_fw_cmd(sc, R92C_CMD_MACID_CONFIG, &cmd, sizeof(cmd));
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not set RA mask for %d station\n",
__func__, macid);
return (error);
}
return (0);
}
#endif
static void
r92c_init_ra(struct rtwn_softc *sc, int macid)
{
struct ieee80211_htrateset *rs_ht;
struct ieee80211_node *ni;
uint32_t rates;
int maxrate;
RTWN_NT_LOCK(sc);
if (sc->node_list[macid] == NULL) {
RTWN_DPRINTF(sc, RTWN_DEBUG_RA, "%s: macid %d, ni is NULL\n",
__func__, macid);
RTWN_NT_UNLOCK(sc);
return;
}
ni = ieee80211_ref_node(sc->node_list[macid]);
if (ni->ni_flags & IEEE80211_NODE_HT)
rs_ht = &ni->ni_htrates;
else
rs_ht = NULL;
/* XXX MACID_BC */
rtwn_get_rates(sc, &ni->ni_rates, rs_ht, &rates, &maxrate, 0);
RTWN_NT_UNLOCK(sc);
#ifndef RTWN_WITHOUT_UCODE
if (sc->sc_ratectl == RTWN_RATECTL_FW) {
r92c_send_ra_cmd(sc, macid, rates, maxrate);
}
#endif
rtwn_write_1(sc, R92C_INIDATA_RATE_SEL(macid), maxrate);
ieee80211_free_node(ni);
}
void
r92c_joinbss_rpt(struct rtwn_softc *sc, int macid)
{
#ifndef RTWN_WITHOUT_UCODE
struct r92c_softc *rs = sc->sc_priv;
struct ieee80211vap *vap;
struct r92c_fw_cmd_joinbss_rpt cmd;
if (sc->vaps[0] == NULL) /* XXX fix */
goto end;
vap = &sc->vaps[0]->vap;
if ((vap->iv_state == IEEE80211_S_RUN) ^
!(rs->rs_flags & R92C_FLAG_ASSOCIATED))
goto end;
if (rs->rs_flags & R92C_FLAG_ASSOCIATED) {
cmd.mstatus = R92C_MSTATUS_DISASSOC;
rs->rs_flags &= ~R92C_FLAG_ASSOCIATED;
} else {
cmd.mstatus = R92C_MSTATUS_ASSOC;
rs->rs_flags |= R92C_FLAG_ASSOCIATED;
}
if (r92c_fw_cmd(sc, R92C_CMD_JOINBSS_RPT, &cmd, sizeof(cmd)) != 0) {
device_printf(sc->sc_dev, "%s: cannot change media status!\n",
__func__);
}
end:
#endif
/* TODO: init rates for RTWN_MACID_BC. */
if (macid & RTWN_MACID_VALID)
r92c_init_ra(sc, macid & ~RTWN_MACID_VALID);
}
#ifndef RTWN_WITHOUT_UCODE
int
r92c_set_rsvd_page(struct rtwn_softc *sc, int probe_resp, int null,
int qos_null)
{
struct r92c_fw_cmd_rsvdpage rsvd;
rsvd.probe_resp = probe_resp;
rsvd.ps_poll = 0;
rsvd.null_data = null;
return (r92c_fw_cmd(sc, R92C_CMD_RSVD_PAGE, &rsvd, sizeof(rsvd)));
}
int
r92c_set_pwrmode(struct rtwn_softc *sc, struct ieee80211vap *vap,
int off)
{
struct r92c_fw_cmd_pwrmode mode;
int error;
/* XXX dm_RF_saving */
if (off && vap->iv_state == IEEE80211_S_RUN &&
(vap->iv_flags & IEEE80211_F_PMGTON))
mode.mode = R92C_PWRMODE_MIN;
else
mode.mode = R92C_PWRMODE_CAM;
mode.smart_ps = R92C_PWRMODE_SMARTPS_NULLDATA;
mode.bcn_pass = 1; /* XXX */
error = r92c_fw_cmd(sc, R92C_CMD_SET_PWRMODE, &mode, sizeof(mode));
if (error != 0) {
device_printf(sc->sc_dev,
"%s: CMD_SET_PWRMODE was not sent, error %d\n",
__func__, error);
}
return (error);
}
void
r92c_set_rssi(struct rtwn_softc *sc)
{
struct ieee80211_node *ni;
struct rtwn_node *rn;
struct r92c_fw_cmd_rssi cmd;
int i;
cmd.reserved = 0;
RTWN_NT_LOCK(sc);
for (i = 0; i < sc->macid_limit; i++) {
/* XXX optimize? */
ni = sc->node_list[i];
if (ni == NULL)
continue;
rn = RTWN_NODE(ni);
cmd.macid = i;
cmd.pwdb = rn->avg_pwdb;
RTWN_DPRINTF(sc, RTWN_DEBUG_RSSI,
"%s: sending RSSI command (macid %d, rssi %d)\n",
__func__, i, rn->avg_pwdb);
RTWN_NT_UNLOCK(sc);
r92c_fw_cmd(sc, R92C_CMD_RSSI_SETTING, &cmd, sizeof(cmd));
RTWN_NT_LOCK(sc);
}
RTWN_NT_UNLOCK(sc);
}
static void
r92c_ratectl_tx_complete(struct rtwn_softc *sc, uint8_t *buf, int len)
{
#if __FreeBSD_version >= 1200012
struct ieee80211_ratectl_tx_status txs;
#endif
struct r92c_c2h_tx_rpt *rpt;
struct ieee80211_node *ni;
uint8_t macid;
int ntries;
if (sc->sc_ratectl != RTWN_RATECTL_NET80211) {
/* shouldn't happen */
device_printf(sc->sc_dev, "%s called while ratectl = %d!\n",
__func__, sc->sc_ratectl);
return;
}
rpt = (struct r92c_c2h_tx_rpt *)buf;
if (len != sizeof(*rpt)) {
device_printf(sc->sc_dev,
"%s: wrong report size (%d, must be %zu)\n",
__func__, len, sizeof(*rpt));
return;
}
RTWN_DPRINTF(sc, RTWN_DEBUG_INTR,
"%s: ccx report dump: 0: %02X, 1: %02X, queue time: "
"low %02X, high %02X, 4: %02X, 5: %02X, 6: %02X, 7: %02X\n",
__func__, rpt->rptb0, rpt->rptb1, rpt->queue_time_low,
rpt->queue_time_high, rpt->rptb4, rpt->rptb5, rpt->rptb6,
rpt->rptb7);
macid = MS(rpt->rptb5, R92C_RPTB5_MACID);
if (macid > sc->macid_limit) {
device_printf(sc->sc_dev,
"macid %u is too big; increase MACID_MAX limit\n",
macid);
return;
}
ntries = MS(rpt->rptb0, R92C_RPTB0_RETRY_CNT);
RTWN_NT_LOCK(sc);
ni = sc->node_list[macid];
if (ni != NULL) {
RTWN_DPRINTF(sc, RTWN_DEBUG_INTR, "%s: frame for macid %u was"
"%s sent (%d retries)\n", __func__, macid,
(rpt->rptb7 & R92C_RPTB7_PKT_OK) ? "" : " not",
ntries);
#if __FreeBSD_version >= 1200012
txs.flags = IEEE80211_RATECTL_STATUS_LONG_RETRY;
txs.long_retries = ntries;
if (rpt->rptb7 & R92C_RPTB7_PKT_OK)
txs.status = IEEE80211_RATECTL_TX_SUCCESS;
else if (rpt->rptb6 & R92C_RPTB6_RETRY_OVER)
txs.status = IEEE80211_RATECTL_TX_FAIL_LONG; /* XXX */
else if (rpt->rptb6 & R92C_RPTB6_LIFE_EXPIRE)
txs.status = IEEE80211_RATECTL_TX_FAIL_EXPIRED;
else
txs.status = IEEE80211_RATECTL_TX_FAIL_UNSPECIFIED;
ieee80211_ratectl_tx_complete(ni, &txs);
#else
struct ieee80211vap *vap = ni->ni_vap;
if (rpt->rptb7 & R92C_RPTB7_PKT_OK) {
ieee80211_ratectl_tx_complete(vap, ni,
IEEE80211_RATECTL_TX_SUCCESS, &ntries, NULL);
} else {
ieee80211_ratectl_tx_complete(vap, ni,
IEEE80211_RATECTL_TX_FAILURE, &ntries, NULL);
}
#endif
} else {
RTWN_DPRINTF(sc, RTWN_DEBUG_INTR, "%s: macid %u, ni is NULL\n",
__func__, macid);
}
RTWN_NT_UNLOCK(sc);
#ifdef IEEE80211_SUPPORT_SUPERG
if (sc->sc_tx_n_active > 0 && --sc->sc_tx_n_active <= 1)
rtwn_cmd_sleepable(sc, NULL, 0, rtwn_ff_flush_all);
#endif
}
static void
r92c_handle_c2h_task(struct rtwn_softc *sc, union sec_param *data)
{
const uint16_t off = R92C_C2H_EVT_MSG + sizeof(struct r92c_c2h_evt);
struct r92c_softc *rs = sc->sc_priv;
uint16_t buf[R92C_C2H_MSG_MAX_LEN / 2 + 1];
uint8_t id, len, status;
int i;
/* Do not reschedule the task if device is not running. */
if (!(sc->sc_flags & RTWN_RUNNING))
return;
/* Read current status. */
status = rtwn_read_1(sc, R92C_C2H_EVT_CLEAR);
if (status == R92C_C2H_EVT_HOST_CLOSE)
goto end; /* nothing to do */
else if (status == R92C_C2H_EVT_FW_CLOSE) {
len = rtwn_read_1(sc, R92C_C2H_EVT_MSG);
id = MS(len, R92C_C2H_EVTB0_ID);
len = MS(len, R92C_C2H_EVTB0_LEN);
memset(buf, 0, sizeof(buf));
/* Try to optimize event reads. */
for (i = 0; i < len; i += 2)
buf[i / 2] = rtwn_read_2(sc, off + i);
KASSERT(i < sizeof(buf), ("%s: buffer overrun (%d >= %zu)!",
__func__, i, sizeof(buf)));
switch (id) {
case R92C_C2H_EVT_TX_REPORT:
r92c_ratectl_tx_complete(sc, (uint8_t *)buf, len);
break;
default:
device_printf(sc->sc_dev,
"%s: C2H report %u (len %u) was not handled\n",
__func__, id, len);
break;
}
}
/* Prepare for next event. */
rtwn_write_1(sc, R92C_C2H_EVT_CLEAR, R92C_C2H_EVT_HOST_CLOSE);
end:
/* Adjust timeout for next call. */
if (rs->rs_c2h_pending != 0) {
rs->rs_c2h_pending = 0;
rs->rs_c2h_paused = 0;
} else
rs->rs_c2h_paused++;
if (rs->rs_c2h_paused > R92C_TX_PAUSED_THRESHOLD)
rs->rs_c2h_timeout = hz;
else
rs->rs_c2h_timeout = MAX(hz / 100, 1);
/* Reschedule the task. */
callout_reset(&rs->rs_c2h_report, rs->rs_c2h_timeout,
r92c_handle_c2h_report, sc);
}
void
r92c_handle_c2h_report(void *arg)
{
struct rtwn_softc *sc = arg;
rtwn_cmd_sleepable(sc, NULL, 0, r92c_handle_c2h_task);
}
#endif /* RTWN_WITHOUT_UCODE */