bcm68620_release/release/host_customized/ll_pcie/bcmolt_llpcie.h

/*
<:copyright-BRCM:2016:DUAL/GPL:standard

   Broadcom Proprietary and Confidential.(c) 2016 Broadcom
   All Rights Reserved

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.

Not withstanding 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.

:>
 */

/*
 * bcm_llpcie.h - Low-level PCIe driver interface
 */

#ifndef BCMOLT_LLPCIE_H_
#define BCMOLT_LLPCIE_H_

#include "bcmos_system.h"
#define MAPLE_MAX_DEVICES               BCMTR_MAX_OLTS

/** Low-level device info */
typedef struct bcmolt_ll_dev_info
{
    unsigned long   soc_regs_base;      /**< Device registers base in host address space */
    unsigned long   soc_sram_base;      /**< Device SRAM base in host address space */
    unsigned long   soc_ddr_base;       /**< Device DDR base in host address space */
    uint32_t        soc_ddr_length;     /**< Device DDR window size */
    uint32_t        irq;                /**< Device irq number */
    int             irq_connected;      /**< Device irq number connected */
} bcm_ll_dev_info;

/** Device PCIe link status change notification callback */
typedef enum
{
    BCM_LL_PCIE_LINK_DOWN,             /**< PCIe link is down */
    BCM_LL_PCIE_LINK_UP,               /**< PCIe link is up */
} bcm_ll_pcie_link_status;

/** Low-level device handle */
typedef void *bcm_ll_pcie_dev;

/** Status change indication */
typedef void (*bcm_ll_pcie_status_change)(uint8_t dev_id, bcm_ll_pcie_link_status status);

/** Register status change notification callback
 * \param[in]   cb      Status change notification callback
 * \return 0=OK or error <0
 */
bcmos_errno bcm_ll_pcie_status_change_register(bcm_ll_pcie_status_change cb);

/** Unregister status change notification callback
 * \return 0=OK or error <0
 */
bcmos_errno bcm_ll_pcie_status_change_unregister(void);

/** Query PCIe device
 * \param[in]   dev_id  Device id
 * \param[out]  info    Device info
 * \return 0=OK, BCM_ERR_IO-dev_id is in proper range, but link is down
 */
bcmos_errno bcm_ll_pcie_query(uint8_t dev_id, bcm_ll_dev_info *info);

/** Get low-level device handle
 * \param[in]   dev_id  Device id
 * \param[out]  lldev   Low-level device handle
 * \return device handle or NULL if link is down
 */
bcm_ll_pcie_dev bcm_ll_pcie_dev_get(uint8_t dev_id);

/* Initialize low-level PCIe driver
 * \return
 *   - 0=OK
 *   - BCM_ERR_INTERNAL - failed to register with PCI subsystem
 */
bcmos_errno bcm_ll_pcie_init(void);

/* Cleanup low-level PCIe driver */
void bcm_ll_pcie_cleanup(void);

/** Enable PCI access to device
 * \param[in]   dev_id  Device id
 * \return
 *   - 0=OK
 *   - BCM_ERR_PARM-dev_id is invalid
 *   - BCM_ERR_IO-dev_id is in proper range, but link is down
 */
bcmos_errno bcm_ll_pcie_dev_enable(int dev_id);

/** Disable PCI access to device
 * \param[in]   dev_id  Device id
 * \return
 *   - 0=OK
 *   - BCM_ERR_PARM-dev_id is invalid
 */
bcmos_errno bcm_ll_pcie_dev_disable(int dev_id);

/** Enable/disable host reset for all PCIe interfaces (automatic
 *  device reset when host is reset)
 * \param[in]   enabled Whether or not hot reset should be enabled
 * \return 0=OK or error <0
 */
bcmos_errno bcm_ll_pcie_host_reset_enable(uint8_t dev_id, bcmos_bool enabled);

#ifdef TX_ENABLE_EVENT_TRACE
/** Handle low-level trace on target
 * \param[in]   dev_id  Device id
 * \param[in]  lfile name for trace
 * \return device handle or NULL if link is down
 */
bcmos_errno bcm_ll_pcie_setrace(uint8_t dev_id);
bcmos_errno bcm_ll_pcie_cleartrace(uint8_t dev_id);
bcmos_errno bcm_ll_pcie_savetrace(uint8_t dev_id, char *tracefilename);
#endif

#endif