wireless/bcmdhd/bcmsdh_linux.c

/*
 * SDIO access interface for drivers - linux specific (pci only)
 *
 * Copyright (C) 1999-2017, Broadcom Corporation
 *
 *      Unless you and Broadcom execute a separate written software license
 * agreement governing use of this software, this software is licensed to you
 * under the terms of the GNU General Public License version 2 (the "GPL"),
 * available at http://www.broadcom.com/licenses/GPLv2.php, with the
 * following added to such license:
 *
 *      As a special exception, the copyright holders of this software give you
 * permission to link this software with independent modules, and to copy and
 * distribute the resulting executable under terms of your choice, provided that
 * you also meet, for each linked independent module, the terms and conditions of
 * the license of that module.  An independent module is a module which is not
 * derived from this software.  The special exception does not apply to any
 * modifications of the software.
 *
 *      Notwithstanding the above, under no circumstances may you combine this
 * software in any way with any other Broadcom software provided under a license
 * other than the GPL, without Broadcom's express prior written consent.
 *
 *
 * <<Broadcom-WL-IPTag/Open:>>
 *
 * $Id: bcmsdh_linux.c 672609 2016-11-29 07:00:46Z $
 */

/**
 * @file bcmsdh_linux.c
 */

#define __UNDEF_NO_VERSION__

#include <typedefs.h>
#include <linuxver.h>
#include <linux/pci.h>
#include <linux/completion.h>

#include <osl.h>
#include <pcicfg.h>
#include <bcmdefs.h>
#include <bcmdevs.h>
#include <linux/irq.h>
extern void dhdsdio_isr(void *args);
#include <bcmutils.h>
#include <dngl_stats.h>
#include <dhd.h>
#if defined(CONFIG_ARCH_ODIN)
#include <linux/platform_data/gpio-odin.h>
#endif /* defined(CONFIG_ARCH_ODIN) */
#include <dhd_linux.h>

/* driver info, initialized when bcmsdh_register is called */
static bcmsdh_driver_t drvinfo = {NULL, NULL, NULL, NULL};

typedef enum {
    DHD_INTR_INVALID = 0,
    DHD_INTR_INBAND,
    DHD_INTR_HWOOB,
    DHD_INTR_SWOOB
} DHD_HOST_INTR_TYPE;

/* the BCMSDH module comprises the generic part (bcmsdh.c) and OS specific layer (e.g.
 * bcmsdh_linux.c). Put all OS specific variables (e.g. irq number and flags) here rather
 * than in the common structure bcmsdh_info. bcmsdh_info only keeps a handle (os_ctx) to this
 * structure.
 */
typedef struct bcmsdh_os_info {
    DHD_HOST_INTR_TYPE    intr_type;
    int            oob_irq_num;    /* valid when hardware or software oob in use */
    unsigned long        oob_irq_flags;    /* valid when hardware or software oob in use */
    bool            oob_irq_registered;
    bool            oob_irq_enabled;
    bool            oob_irq_wake_enabled;
    spinlock_t        oob_irq_spinlock;
    bcmsdh_cb_fn_t        oob_irq_handler;
    void            *oob_irq_handler_context;
    void            *context;    /* context returned from upper layer */
    void            *sdioh;        /* handle to lower layer (sdioh) */
    void            *dev;        /* handle to the underlying device */
    bool            dev_wake_enabled;
} bcmsdh_os_info_t;

/* debugging macros */
#define SDLX_MSG(x) printf x

/**
 * Checks to see if vendor and device IDs match a supported SDIO Host Controller.
 */
bool
bcmsdh_chipmatch(uint16 vendor, uint16 device)
{
    /* Add other vendors and devices as required */

#ifdef BCMSDIOH_STD
    /* Check for Arasan host controller */
    if (vendor == VENDOR_SI_IMAGE) {
        return (TRUE);
    }
    /* Check for BRCM 27XX Standard host controller */
    if (device == BCM27XX_SDIOH_ID && vendor == VENDOR_BROADCOM) {
        return (TRUE);
    }
    /* Check for BRCM Standard host controller */
    if (device == SDIOH_FPGA_ID && vendor == VENDOR_BROADCOM) {
        return (TRUE);
    }
    /* Check for TI PCIxx21 Standard host controller */
    if (device == PCIXX21_SDIOH_ID && vendor == VENDOR_TI) {
        return (TRUE);
    }
    if (device == PCIXX21_SDIOH0_ID && vendor == VENDOR_TI) {
        return (TRUE);
    }
    /* Ricoh R5C822 Standard SDIO Host */
    if (device == R5C822_SDIOH_ID && vendor == VENDOR_RICOH) {
        return (TRUE);
    }
    /* JMicron Standard SDIO Host */
    if (device == JMICRON_SDIOH_ID && vendor == VENDOR_JMICRON) {
        return (TRUE);
    }

#endif /* BCMSDIOH_STD */
#ifdef BCMSDIOH_SPI
    /* This is the PciSpiHost. */
    if (device == SPIH_FPGA_ID && vendor == VENDOR_BROADCOM) {
        printf("Found PCI SPI Host Controller\n");
        return (TRUE);
    }

#endif /* BCMSDIOH_SPI */

    return (FALSE);
}

void* bcmsdh_probe(osl_t *osh, void *dev, void *sdioh, void *adapter_info, uint bus_type,
    uint bus_num, uint slot_num)
{
    ulong regs;
    bcmsdh_info_t *bcmsdh;
    uint32 vendevid;
    bcmsdh_os_info_t *bcmsdh_osinfo = NULL;

    bcmsdh = bcmsdh_attach(osh, sdioh, &regs);
    if (bcmsdh == NULL) {
        SDLX_MSG(("%s: bcmsdh_attach failed\n", __FUNCTION__));
        goto err;
    }
    bcmsdh_osinfo = MALLOC(osh, sizeof(bcmsdh_os_info_t));
    if (bcmsdh_osinfo == NULL) {
        SDLX_MSG(("%s: failed to allocate bcmsdh_os_info_t\n", __FUNCTION__));
        goto err;
    }
    bzero((char *)bcmsdh_osinfo, sizeof(bcmsdh_os_info_t));
    bcmsdh->os_cxt = bcmsdh_osinfo;
    bcmsdh_osinfo->sdioh = sdioh;
    bcmsdh_osinfo->dev = dev;
    osl_set_bus_handle(osh, bcmsdh);

#if !defined(CONFIG_HAS_WAKELOCK) && (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 36))
    if (dev && device_init_wakeup(dev, true) == 0)
        bcmsdh_osinfo->dev_wake_enabled = TRUE;
#endif /* !defined(CONFIG_HAS_WAKELOCK) && (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 36)) */

#if defined(OOB_INTR_ONLY)
    spin_lock_init(&bcmsdh_osinfo->oob_irq_spinlock);
    /* Get customer specific OOB IRQ parametres: IRQ number as IRQ type */
    bcmsdh_osinfo->oob_irq_num = wifi_platform_get_irq_number(adapter_info,
        &bcmsdh_osinfo->oob_irq_flags);
    if  (bcmsdh_osinfo->oob_irq_num < 0) {
        SDLX_MSG(("%s: Host OOB irq is not defined\n", __FUNCTION__));
        goto err;
    }
#endif /* defined(BCMLXSDMMC) */

    /* Read the vendor/device ID from the CIS */
    vendevid = bcmsdh_query_device(bcmsdh);
    /* try to attach to the target device */
    bcmsdh_osinfo->context = drvinfo.probe((vendevid >> 16), (vendevid & 0xFFFF), bus_num,
        slot_num, 0, bus_type, (void *)regs, osh, bcmsdh);
    if (bcmsdh_osinfo->context == NULL) {
        SDLX_MSG(("%s: device attach failed\n", __FUNCTION__));
        goto err;
    }

    return bcmsdh;

    /* error handling */
err:
    if (bcmsdh != NULL)
        bcmsdh_detach(osh, bcmsdh);
    if (bcmsdh_osinfo != NULL)
        MFREE(osh, bcmsdh_osinfo, sizeof(bcmsdh_os_info_t));
    return NULL;
}

int bcmsdh_remove(bcmsdh_info_t *bcmsdh)
{
    bcmsdh_os_info_t *bcmsdh_osinfo = bcmsdh->os_cxt;

#if !defined(CONFIG_HAS_WAKELOCK) && (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 36))
    if (bcmsdh_osinfo->dev)
        device_init_wakeup(bcmsdh_osinfo->dev, false);
    bcmsdh_osinfo->dev_wake_enabled = FALSE;
#endif /* !defined(CONFIG_HAS_WAKELOCK) && (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 36)) */

    drvinfo.remove(bcmsdh_osinfo->context);
    MFREE(bcmsdh->osh, bcmsdh->os_cxt, sizeof(bcmsdh_os_info_t));
    bcmsdh_detach(bcmsdh->osh, bcmsdh);

    return 0;
}

#ifdef DHD_WAKE_STATUS
int bcmsdh_get_total_wake(bcmsdh_info_t *bcmsdh)
{
    return bcmsdh->total_wake_count;
}

int bcmsdh_set_get_wake(bcmsdh_info_t *bcmsdh, int flag)
{
    bcmsdh_os_info_t *bcmsdh_osinfo = bcmsdh->os_cxt;
    unsigned long flags;
    int ret;

    spin_lock_irqsave(&bcmsdh_osinfo->oob_irq_spinlock, flags);

    ret = bcmsdh->pkt_wake;
    bcmsdh->total_wake_count += flag;
    bcmsdh->pkt_wake = flag;

    spin_unlock_irqrestore(&bcmsdh_osinfo->oob_irq_spinlock, flags);
    return ret;
}
#endif /* DHD_WAKE_STATUS */

int bcmsdh_suspend(bcmsdh_info_t *bcmsdh)
{
    bcmsdh_os_info_t *bcmsdh_osinfo = bcmsdh->os_cxt;

    if (drvinfo.suspend && drvinfo.suspend(bcmsdh_osinfo->context))
        return -EBUSY;
    return 0;
}

int bcmsdh_resume(bcmsdh_info_t *bcmsdh)
{
    bcmsdh_os_info_t *bcmsdh_osinfo = bcmsdh->os_cxt;

    if (drvinfo.resume)
        return drvinfo.resume(bcmsdh_osinfo->context);
    return 0;
}

extern int bcmsdh_register_client_driver(void);
extern void bcmsdh_unregister_client_driver(void);
extern int sdio_func_reg_notify(void* semaphore);
extern void sdio_func_unreg_notify(void);

#if defined(BCMLXSDMMC)
int bcmsdh_reg_sdio_notify(void* semaphore)
{
    return sdio_func_reg_notify(semaphore);
}

void bcmsdh_unreg_sdio_notify(void)
{
    sdio_func_unreg_notify();
}
#endif /* defined(BCMLXSDMMC) */

int
bcmsdh_register(bcmsdh_driver_t *driver)
{
    int error = 0;

    drvinfo = *driver;
    SDLX_MSG(("%s: register client driver\n", __FUNCTION__));
    error = bcmsdh_register_client_driver();
    if (error)
        SDLX_MSG(("%s: failed %d\n", __FUNCTION__, error));

    return error;
}

void
bcmsdh_unregister(void)
{
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0))
        if (bcmsdh_pci_driver.node.next == NULL)
            return;
#endif

    bcmsdh_unregister_client_driver();
}

void bcmsdh_dev_pm_stay_awake(bcmsdh_info_t *bcmsdh)
{
#if !defined(CONFIG_HAS_WAKELOCK) && (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 36))
    bcmsdh_os_info_t *bcmsdh_osinfo = bcmsdh->os_cxt;
    pm_stay_awake(bcmsdh_osinfo->dev);
#endif /* !defined(CONFIG_HAS_WAKELOCK) && (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 36)) */
}

void bcmsdh_dev_relax(bcmsdh_info_t *bcmsdh)
{
#if !defined(CONFIG_HAS_WAKELOCK) && (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 36))
    bcmsdh_os_info_t *bcmsdh_osinfo = bcmsdh->os_cxt;
    pm_relax(bcmsdh_osinfo->dev);
#endif /* !defined(CONFIG_HAS_WAKELOCK) && (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 36)) */
}

bool bcmsdh_dev_pm_enabled(bcmsdh_info_t *bcmsdh)
{
    bcmsdh_os_info_t *bcmsdh_osinfo = bcmsdh->os_cxt;

    return bcmsdh_osinfo->dev_wake_enabled;
}

#if defined(OOB_INTR_ONLY)
void bcmsdh_oob_intr_set(bcmsdh_info_t *bcmsdh, bool enable)
{
    unsigned long flags;
    bcmsdh_os_info_t *bcmsdh_osinfo;

    if (!bcmsdh)
        return;

    bcmsdh_osinfo = bcmsdh->os_cxt;
    spin_lock_irqsave(&bcmsdh_osinfo->oob_irq_spinlock, flags);
    if (bcmsdh_osinfo->oob_irq_enabled != enable) {
        if (enable)
            enable_irq(bcmsdh_osinfo->oob_irq_num);
        else
            disable_irq_nosync(bcmsdh_osinfo->oob_irq_num);
        bcmsdh_osinfo->oob_irq_enabled = enable;
    }
    spin_unlock_irqrestore(&bcmsdh_osinfo->oob_irq_spinlock, flags);
}

static irqreturn_t wlan_oob_irq(int irq, void *dev_id)
{
    bcmsdh_info_t *bcmsdh = (bcmsdh_info_t *)dev_id;
    bcmsdh_os_info_t *bcmsdh_osinfo = bcmsdh->os_cxt;

    bcmsdh_oob_intr_set(bcmsdh, FALSE);
    bcmsdh_osinfo->oob_irq_handler(bcmsdh_osinfo->oob_irq_handler_context);

    return IRQ_HANDLED;
}

int bcmsdh_oob_intr_register(bcmsdh_info_t *bcmsdh, bcmsdh_cb_fn_t oob_irq_handler,
    void* oob_irq_handler_context)
{
    int err = 0;
    bcmsdh_os_info_t *bcmsdh_osinfo = bcmsdh->os_cxt;

    if (bcmsdh_osinfo->oob_irq_registered) {
        SDLX_MSG(("%s: irq is already registered\n", __FUNCTION__));
        return -EBUSY;
    }
#ifdef HW_OOB
    printf("%s: HW_OOB irq=%d flags=0x%X\n", __FUNCTION__,
        (int)bcmsdh_osinfo->oob_irq_num, (int)bcmsdh_osinfo->oob_irq_flags);
#else
    printf("%s: SW_OOB irq=%d flags=0x%X\n", __FUNCTION__,
        (int)bcmsdh_osinfo->oob_irq_num, (int)bcmsdh_osinfo->oob_irq_flags);
#endif
    bcmsdh_osinfo->oob_irq_handler = oob_irq_handler;
    bcmsdh_osinfo->oob_irq_handler_context = oob_irq_handler_context;
    bcmsdh_osinfo->oob_irq_enabled = TRUE;
    bcmsdh_osinfo->oob_irq_registered = TRUE;
#if defined(CONFIG_ARCH_ODIN)
    err = odin_gpio_sms_request_irq(bcmsdh_osinfo->oob_irq_num, wlan_oob_irq,
        bcmsdh_osinfo->oob_irq_flags, "bcmsdh_sdmmc", bcmsdh);
#else
    err = request_irq(bcmsdh_osinfo->oob_irq_num, wlan_oob_irq,
        bcmsdh_osinfo->oob_irq_flags, "bcmsdh_sdmmc", bcmsdh);
#endif /* defined(CONFIG_ARCH_ODIN) */
    if (err) {
        SDLX_MSG(("%s: request_irq failed with %d\n", __FUNCTION__, err));
        bcmsdh_osinfo->oob_irq_enabled = FALSE;
        bcmsdh_osinfo->oob_irq_registered = FALSE;
        return err;
    }

#if defined(DISABLE_WOWLAN)
    SDLX_MSG(("%s: disable_irq_wake\n", __FUNCTION__));
    bcmsdh_osinfo->oob_irq_wake_enabled = FALSE;
#else
    err = enable_irq_wake(bcmsdh_osinfo->oob_irq_num);
    if (err)
        SDLX_MSG(("%s: enable_irq_wake failed with %d\n", __FUNCTION__, err));
    else
        bcmsdh_osinfo->oob_irq_wake_enabled = TRUE;
#endif

    return 0;
}

void bcmsdh_oob_intr_unregister(bcmsdh_info_t *bcmsdh)
{
    int err = 0;
    bcmsdh_os_info_t *bcmsdh_osinfo = bcmsdh->os_cxt;

    SDLX_MSG(("%s: Enter\n", __FUNCTION__));
    if (!bcmsdh_osinfo->oob_irq_registered) {
        SDLX_MSG(("%s: irq is not registered\n", __FUNCTION__));
        return;
    }
    if (bcmsdh_osinfo->oob_irq_wake_enabled) {
        err = disable_irq_wake(bcmsdh_osinfo->oob_irq_num);
        if (!err)
            bcmsdh_osinfo->oob_irq_wake_enabled = FALSE;
    }
    if (bcmsdh_osinfo->oob_irq_enabled) {
        disable_irq(bcmsdh_osinfo->oob_irq_num);
        bcmsdh_osinfo->oob_irq_enabled = FALSE;
    }
    free_irq(bcmsdh_osinfo->oob_irq_num, bcmsdh);
    bcmsdh_osinfo->oob_irq_registered = FALSE;
}
#endif

/* Module parameters specific to each host-controller driver */

extern uint sd_msglevel;    /* Debug message level */
module_param(sd_msglevel, uint, 0);

extern uint sd_power;    /* 0 = SD Power OFF, 1 = SD Power ON. */
module_param(sd_power, uint, 0);

extern uint sd_clock;    /* SD Clock Control, 0 = SD Clock OFF, 1 = SD Clock ON */
module_param(sd_clock, uint, 0);

extern uint sd_divisor;    /* Divisor (-1 means external clock) */
module_param(sd_divisor, uint, 0);

extern uint sd_sdmode;    /* Default is SD4, 0=SPI, 1=SD1, 2=SD4 */
module_param(sd_sdmode, uint, 0);

extern uint sd_hiok;    /* Ok to use hi-speed mode */
module_param(sd_hiok, uint, 0);

extern uint sd_f2_blocksize;
module_param(sd_f2_blocksize, int, 0);

extern uint sd_f1_blocksize;
module_param(sd_f1_blocksize, int, 0);

#ifdef BCMSDIOH_STD
extern int sd_uhsimode;
module_param(sd_uhsimode, int, 0);
extern uint sd_tuning_period;
module_param(sd_tuning_period, uint, 0);
extern int sd_delay_value;
module_param(sd_delay_value, uint, 0);

/* SDIO Drive Strength for UHSI mode specific to SDIO3.0 */
extern char dhd_sdiod_uhsi_ds_override[2];
module_param_string(dhd_sdiod_uhsi_ds_override, dhd_sdiod_uhsi_ds_override, 2, 0);

#endif

#ifdef BCMSDH_MODULE
EXPORT_SYMBOL(bcmsdh_attach);
EXPORT_SYMBOL(bcmsdh_detach);
EXPORT_SYMBOL(bcmsdh_intr_query);
EXPORT_SYMBOL(bcmsdh_intr_enable);
EXPORT_SYMBOL(bcmsdh_intr_disable);
EXPORT_SYMBOL(bcmsdh_intr_reg);
EXPORT_SYMBOL(bcmsdh_intr_dereg);

#if defined(DHD_DEBUG)
EXPORT_SYMBOL(bcmsdh_intr_pending);
#endif

#if defined(BT_OVER_SDIO)
EXPORT_SYMBOL(bcmsdh_btsdio_interface_init);
#endif /* defined (BT_OVER_SDIO) */

EXPORT_SYMBOL(bcmsdh_devremove_reg);
EXPORT_SYMBOL(bcmsdh_cfg_read);
EXPORT_SYMBOL(bcmsdh_cfg_write);
EXPORT_SYMBOL(bcmsdh_cis_read);
EXPORT_SYMBOL(bcmsdh_reg_read);
EXPORT_SYMBOL(bcmsdh_reg_write);
EXPORT_SYMBOL(bcmsdh_regfail);
EXPORT_SYMBOL(bcmsdh_send_buf);
EXPORT_SYMBOL(bcmsdh_recv_buf);

EXPORT_SYMBOL(bcmsdh_rwdata);
EXPORT_SYMBOL(bcmsdh_abort);
EXPORT_SYMBOL(bcmsdh_query_device);
EXPORT_SYMBOL(bcmsdh_query_iofnum);
EXPORT_SYMBOL(bcmsdh_iovar_op);
EXPORT_SYMBOL(bcmsdh_register);
EXPORT_SYMBOL(bcmsdh_unregister);
EXPORT_SYMBOL(bcmsdh_chipmatch);
EXPORT_SYMBOL(bcmsdh_reset);
EXPORT_SYMBOL(bcmsdh_waitlockfree);

EXPORT_SYMBOL(bcmsdh_get_dstatus);
EXPORT_SYMBOL(bcmsdh_cfg_read_word);
EXPORT_SYMBOL(bcmsdh_cfg_write_word);
EXPORT_SYMBOL(bcmsdh_cur_sbwad);
EXPORT_SYMBOL(bcmsdh_chipinfo);

#endif /* BCMSDH_MODULE */