/*      $OpenBSD: if_rtwn.c,v 1.6 2015/08/28 00:03:53 deraadt Exp $     */

/*-
 * Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
 * Copyright (c) 2015 Stefan Sperling <stsp@openbsd.org>
 * Copyright (c) 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>
#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 <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.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 <dev/rtwn/if_rtwnvar.h>

#include <dev/rtwn/pci/rtwn_pci_var.h>

#include <dev/rtwn/rtl8192c/r92c_var.h>

#include <dev/rtwn/rtl8192c/pci/r92ce.h>
#include <dev/rtwn/rtl8192c/pci/r92ce_reg.h>

void
r92ce_init_intr(struct rtwn_softc *sc)
{
        /* Disable interrupts. */
        rtwn_write_4(sc, R92C_HISR, 0x00000000);
        rtwn_write_4(sc, R92C_HIMR, 0x00000000);
}

void
r92ce_init_edca(struct rtwn_softc *sc)
{
        /* SIFS */
        rtwn_write_2(sc, R92C_SPEC_SIFS, 0x1010);
        rtwn_write_2(sc, R92C_MAC_SPEC_SIFS, 0x1010);
        rtwn_write_2(sc, R92C_SIFS_CCK, 0x1010);
        rtwn_write_2(sc, R92C_SIFS_OFDM, 0x0e0e);
        /* TXOP */
        rtwn_write_4(sc, R92C_EDCA_BE_PARAM, 0x005ea42b);
        rtwn_write_4(sc, R92C_EDCA_BK_PARAM, 0x0000a44f);
        rtwn_write_4(sc, R92C_EDCA_VI_PARAM, 0x005e4322);
        rtwn_write_4(sc, R92C_EDCA_VO_PARAM, 0x002f3222);
}

void
r92ce_init_bb(struct rtwn_softc *sc)
{

        /* Enable BB and RF. */
        rtwn_setbits_2(sc, R92C_SYS_FUNC_EN, 0,
            R92C_SYS_FUNC_EN_BBRSTB | R92C_SYS_FUNC_EN_BB_GLB_RST |
            R92C_SYS_FUNC_EN_DIO_RF);

        rtwn_write_2(sc, R92C_AFE_PLL_CTRL, 0xdb83);

        rtwn_write_1(sc, R92C_RF_CTRL,
            R92C_RF_CTRL_EN | R92C_RF_CTRL_RSTB | R92C_RF_CTRL_SDMRSTB);

        rtwn_write_1(sc, R92C_SYS_FUNC_EN,
            R92C_SYS_FUNC_EN_DIO_PCIE | R92C_SYS_FUNC_EN_PCIEA |
            R92C_SYS_FUNC_EN_PPLL | R92C_SYS_FUNC_EN_BB_GLB_RST |
            R92C_SYS_FUNC_EN_BBRSTB);

        rtwn_write_1(sc, R92C_AFE_XTAL_CTRL + 1, 0x80);

        rtwn_setbits_4(sc, R92C_LEDCFG0, 0, 0x00800000);

        r92c_init_bb_common(sc);
}

int
r92ce_power_on(struct rtwn_softc *sc)
{
        struct r92c_softc *rs = sc->sc_priv;
        uint32_t reg;
        int ntries;

        /* Wait for autoload done bit. */
        for (ntries = 0; ntries < 1000; ntries++) {
                if (rtwn_read_1(sc, R92C_APS_FSMCO) & R92C_APS_FSMCO_PFM_ALDN)
                        break;
                DELAY(5);
        }
        if (ntries == 1000) {
                device_printf(sc->sc_dev,
                    "timeout waiting for chip autoload\n");
                return (ETIMEDOUT);
        }

        /* Unlock ISO/CLK/Power control register. */
        rtwn_write_1(sc, R92C_RSV_CTRL, 0);

        if (rs->board_type != R92C_BOARD_TYPE_DONGLE) {
                /* bt coex */
                rtwn_setbits_4(sc, R92C_APS_FSMCO, 0,
                    R92C_APS_FSMCO_SOP_ABG |
                    R92C_APS_FSMCO_SOP_AMB |
                    R92C_APS_FSMCO_XOP_BTCK);
        }

        /* Move SPS into PWM mode. */
        rtwn_write_1(sc, R92C_SPS0_CTRL, 0x2b);

        /* Set low byte to 0x0f, leave others unchanged. */
        rtwn_write_1(sc, R92C_AFE_XTAL_CTRL, 0x0f);

        /* TODO: check if we need this for 8188CE */
        if (rs->board_type != R92C_BOARD_TYPE_DONGLE) {
                /* bt coex */
                /* XXX magic from linux */
                rtwn_setbits_4(sc, R92C_AFE_XTAL_CTRL, 0x024800, 0);
        }

        rtwn_setbits_2(sc, R92C_SYS_ISO_CTRL, 0xff00,
            R92C_SYS_ISO_CTRL_PWC_EV12V | R92C_SYS_ISO_CTRL_DIOR);

        DELAY(200);

        /* TODO: linux does additional btcoex stuff here */

        /* Auto enable WLAN. */
        rtwn_setbits_2(sc, R92C_APS_FSMCO, 0, R92C_APS_FSMCO_APFM_ONMAC);
        for (ntries = 0; ntries < 1000; ntries++) {
                if (!(rtwn_read_2(sc, R92C_APS_FSMCO) &
                    R92C_APS_FSMCO_APFM_ONMAC))
                        break;
                DELAY(5);
        }
        if (ntries == 1000) {
                device_printf(sc->sc_dev, "timeout waiting for MAC auto ON\n");
                return (ETIMEDOUT);
        }

        /* Enable radio, GPIO and LED functions. */
        rtwn_write_2(sc, R92C_APS_FSMCO,
            R92C_APS_FSMCO_AFSM_PCIE |
            R92C_APS_FSMCO_PDN_EN |
            R92C_APS_FSMCO_PFM_ALDN);
        /* Release RF digital isolation. */
        rtwn_setbits_2(sc, R92C_SYS_ISO_CTRL, R92C_SYS_ISO_CTRL_DIOR, 0);

        if (rs->chip & R92C_CHIP_92C)
                rtwn_write_1(sc, R92C_PCIE_CTRL_REG + 3, 0x77);
        else
                rtwn_write_1(sc, R92C_PCIE_CTRL_REG + 3, 0x22);

        rtwn_write_4(sc, R92C_INT_MIG, 0);

        if (rs->board_type != R92C_BOARD_TYPE_DONGLE) {
                /* bt coex */
                /* XXX magic from linux */
                rtwn_setbits_1(sc, R92C_AFE_XTAL_CTRL + 2, 0x02, 0);
        }

        rtwn_setbits_1(sc, R92C_GPIO_MUXCFG, R92C_GPIO_MUXCFG_RFKILL, 0);

        reg = rtwn_read_1(sc, R92C_GPIO_IO_SEL);
        if (!(reg & R92C_GPIO_IO_SEL_RFKILL)) {
                device_printf(sc->sc_dev,
                    "radio is disabled by hardware switch\n");
                /* XXX how driver will know when radio will be enabled? */
                return (EPERM);
        }

        /* Initialize MAC. */
        rtwn_setbits_1(sc, R92C_APSD_CTRL, R92C_APSD_CTRL_OFF, 0);
        for (ntries = 0; ntries < 200; ntries++) {
                if (!(rtwn_read_1(sc, R92C_APSD_CTRL) &
                    R92C_APSD_CTRL_OFF_STATUS))
                        break;
                DELAY(500);
        }
        if (ntries == 200) {
                device_printf(sc->sc_dev,
                    "timeout waiting for MAC initialization\n");
                return (ETIMEDOUT);
        }

        /* Enable MAC DMA/WMAC/SCHEDULE/SEC blocks. */
        rtwn_setbits_2(sc, R92C_CR, 0,
            R92C_CR_HCI_TXDMA_EN | R92C_CR_HCI_RXDMA_EN |
            R92C_CR_TXDMA_EN | R92C_CR_RXDMA_EN | R92C_CR_PROTOCOL_EN |
            R92C_CR_SCHEDULE_EN | R92C_CR_MACTXEN | R92C_CR_MACRXEN |
            ((sc->sc_hwcrypto != RTWN_CRYPTO_SW) ? R92C_CR_ENSEC : 0));

        rtwn_write_4(sc, R92C_MCUTST_1, 0x0);

        return (0);
}

void
r92ce_power_off(struct rtwn_softc *sc)
{
#ifndef RTWN_WITHOUT_UCODE
        struct r92c_softc *rs = sc->sc_priv;

        /* Deinit C2H event handler. */
        callout_stop(&rs->rs_c2h_report);
        rs->rs_c2h_paused = 0;
        rs->rs_c2h_pending = 0;
        rs->rs_c2h_timeout = hz;
#endif

        /* Stop hardware. */
        /* Disable interrupts. */
        rtwn_write_4(sc, R92C_HISR, 0);
        rtwn_write_4(sc, R92C_HIMR, 0);

        /* Stop hardware. */
        rtwn_write_1(sc, R92C_TXPAUSE, R92C_TX_QUEUE_ALL);

        /* Turn off RF. */
        rtwn_write_1(sc, R92C_RF_CTRL, 0);

        /* Reset BB state machine */
        rtwn_setbits_1(sc, R92C_SYS_FUNC_EN, 0, R92C_SYS_FUNC_EN_BB_GLB_RST);
        rtwn_setbits_1(sc, R92C_SYS_FUNC_EN, R92C_SYS_FUNC_EN_BB_GLB_RST, 0);

        /* Disable MAC DMA/WMAC/SCHEDULE/SEC blocks. */
        rtwn_setbits_2(sc, R92C_CR,
            R92C_CR_HCI_TXDMA_EN | R92C_CR_HCI_RXDMA_EN |
            R92C_CR_TXDMA_EN | R92C_CR_RXDMA_EN | R92C_CR_PROTOCOL_EN |
            R92C_CR_SCHEDULE_EN | R92C_CR_MACTXEN | R92C_CR_MACRXEN |
            R92C_CR_ENSEC,
            0);

        /* If firmware in ram code, do reset. */
#ifndef RTWN_WITHOUT_UCODE
        if (rtwn_read_1(sc, R92C_MCUFWDL) & R92C_MCUFWDL_RAM_DL_SEL)
                r92ce_fw_reset(sc, RTWN_FW_RESET_SHUTDOWN);
#endif

        /* TODO: linux does additional btcoex stuff here */
        rtwn_write_2(sc, R92C_AFE_PLL_CTRL, 0x80); /* linux magic number */
        rtwn_write_1(sc, R92C_SPS0_CTRL, 0x23); /* ditto */
        rtwn_write_1(sc, R92C_AFE_XTAL_CTRL, 0x0e); /* different with btcoex */
        rtwn_write_1(sc, R92C_RSV_CTRL, 0x0e);
        rtwn_write_1(sc, R92C_APS_FSMCO, R92C_APS_FSMCO_PDN_EN);
}

void
r92ce_init_ampdu(struct rtwn_softc *sc)
{

        /* Setup AMPDU aggregation. */
        rtwn_write_4(sc, R92C_AGGLEN_LMT, 0x99997631);  /* MCS7~0 */
        rtwn_write_1(sc, R92C_AGGR_BREAK_TIME, 0x16);
}

void
r92ce_post_init(struct rtwn_softc *sc)
{
        rtwn_write_2(sc, R92C_FWHW_TXQ_CTRL,
            0x1f00 | R92C_FWHW_TXQ_CTRL_AMPDU_RTY_NEW);

        rtwn_write_1(sc, R92C_BCN_MAX_ERR, 0xff);

        /* Perform LO and IQ calibrations. */
        r92ce_iq_calib(sc);
        /* Perform LC calibration. */
        r92c_lc_calib(sc);

        r92c_pa_bias_init(sc);

        /* Fix for lower temperature. */
        rtwn_write_1(sc, 0x15, 0xe9);

#ifndef RTWN_WITHOUT_UCODE
        if (sc->sc_flags & RTWN_FW_LOADED) {
                struct r92c_softc *rs = sc->sc_priv;

                if (sc->sc_ratectl_sysctl == RTWN_RATECTL_FW) {
                        /* XXX TODO: fix (see comment in r92cu_init.c) */
                        sc->sc_ratectl = RTWN_RATECTL_NET80211;
                } else
                        sc->sc_ratectl = sc->sc_ratectl_sysctl;

                /* Start C2H event handling. */
                callout_reset(&rs->rs_c2h_report, rs->rs_c2h_timeout,
                    r92c_handle_c2h_report, sc);
        } else
#endif
                sc->sc_ratectl = RTWN_RATECTL_NONE;
}