/* Copyright 2008-2009 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, available
 * at http://www.gnu.org/licenses/old-licenses/gpl-2.0.html (the "GPL").
 *
 * 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.
 *
 * Written by Yaniv Rosner
 *
 */

#ifndef BNX2X_LINK_H
#define BNX2X_LINK_H


/***********************************************************/
/*                         Defines                         */
/***********************************************************/
#define DEFAULT_PHY_DEV_ADDR 3


#define BNX2X_FLOW_CTRL_AUTO		PORT_FEATURE_FLOW_CONTROL_AUTO
#define BNX2X_FLOW_CTRL_TX		PORT_FEATURE_FLOW_CONTROL_TX
#define BNX2X_FLOW_CTRL_RX		PORT_FEATURE_FLOW_CONTROL_RX
#define BNX2X_FLOW_CTRL_BOTH		PORT_FEATURE_FLOW_CONTROL_BOTH
#define BNX2X_FLOW_CTRL_NONE		PORT_FEATURE_FLOW_CONTROL_NONE

#define SPEED_AUTO_NEG	    0
#define SPEED_12000		12000
#define SPEED_12500		12500
#define SPEED_13000		13000
#define SPEED_15000		15000
#define SPEED_16000		16000


/***********************************************************/
/*                         Structs                         */
/***********************************************************/
/* Inputs parameters to the CLC */
struct link_params {

	u8 port;

	/* Default / User Configuration */
	u8 loopback_mode;
#define LOOPBACK_NONE	0
#define LOOPBACK_EMAC	1
#define LOOPBACK_BMAC	2
#define LOOPBACK_XGXS_10	3
#define LOOPBACK_EXT_PHY	4
#define LOOPBACK_EXT 	5

	u16 req_duplex;
	u16 req_flow_ctrl;
	u16 req_fc_auto_adv; /* Should be set to TX / BOTH when
	req_flow_ctrl is set to AUTO */
	u16 req_line_speed; /* Also determine AutoNeg */

	/* Device parameters */
	u8 mac_addr[6];

	/* shmem parameters */
	u32 shmem_base;
	u32 speed_cap_mask;
	u32 switch_cfg;
#define SWITCH_CFG_1G		PORT_FEATURE_CON_SWITCH_1G_SWITCH
#define SWITCH_CFG_10G		PORT_FEATURE_CON_SWITCH_10G_SWITCH
#define SWITCH_CFG_AUTO_DETECT	PORT_FEATURE_CON_SWITCH_AUTO_DETECT

	u16 hw_led_mode; /* part of the hw_config read from the shmem */
	u32 lane_config;
	u32 ext_phy_config;
#define XGXS_EXT_PHY_TYPE(ext_phy_config)	(ext_phy_config & \
					PORT_HW_CFG_XGXS_EXT_PHY_TYPE_MASK)
#define SERDES_EXT_PHY_TYPE(ext_phy_config)	(ext_phy_config & \
					PORT_HW_CFG_SERDES_EXT_PHY_TYPE_MASK)
	/* Phy register parameter */
	u32 chip_id;

	/* phy_addr populated by the CLC */
	u8 phy_addr;
	u16 xgxs_config_rx[4]; /* preemphasis values for the rx side */

	u16 xgxs_config_tx[4]; /* preemphasis values for the tx side */
	u32 feature_config_flags;
#define FEATURE_CONFIG_OVERRIDE_PREEMPHASIS_ENABLED (1<<0)
#define FEATURE_CONFIG_MODULE_ENFORCMENT_ENABLED	(2<<0)
	/* Device pointer passed to all callback functions */
	struct bnx2x *bp;
};

/* Output parameters */
struct link_vars {
	u8 phy_link_up; /* internal phy link indication */
	u8 link_up;
	u16 duplex;
	u16 flow_ctrl;
	u32 ieee_fc;
	u8 mac_type;

#define MAC_TYPE_NONE	0
#define MAC_TYPE_EMAC	1
#define MAC_TYPE_BMAC	2
	u16 line_speed;
	u32 autoneg;
#define AUTO_NEG_DISABLED			0x0
#define AUTO_NEG_ENABLED			0x1
#define AUTO_NEG_COMPLETE			0x2
#define AUTO_NEG_PARALLEL_DETECTION_USED 	0x3

	u8 phy_flags;

	/* The same definitions as the shmem parameter */
	u32 link_status;
};

/***********************************************************/
/*                         Functions                       */
/***********************************************************/

/* Initialize the phy */
u8 bnx2x_phy_init(struct link_params *input, struct link_vars *output);

/* Reset the link. Should be called when driver or interface goes down
   Before calling phy firmware upgrade, the reset_ext_phy should be set
   to 0 */
u8 bnx2x_link_reset(struct link_params *params, struct link_vars *vars,
		  u8 reset_ext_phy);

/* bnx2x_link_update should be called upon link interrupt */
u8 bnx2x_link_update(struct link_params *input, struct link_vars *output);

/* use the following cl45 functions to read/write from external_phy
  In order to use it to read/write internal phy registers, use
  DEFAULT_PHY_DEV_ADDR as devad, and (_bank + (_addr & 0xf)) as
  Use ext_phy_type of 0 in case of cl22 over cl45
  the register */
u8 bnx2x_cl45_read(struct bnx2x *bp, u8 port, u32 ext_phy_type,
		 u8 phy_addr, u8 devad, u16 reg, u16 *ret_val);

u8 bnx2x_cl45_write(struct bnx2x *bp, u8 port, u32 ext_phy_type,
		  u8 phy_addr, u8 devad, u16 reg, u16 val);

/* Reads the link_status from the shmem,
   and update the link vars accordingly */
void bnx2x_link_status_update(struct link_params *input,
			    struct link_vars *output);
/* returns string representing the fw_version of the external phy */
u8 bnx2x_get_ext_phy_fw_version(struct link_params *params, u8 driver_loaded,
			      u8 *version, u16 len);

/* Set/Unset the led
   Basically, the CLC takes care of the led for the link, but in case one needs
   to set/unset the led unnaturally, set the "mode" to LED_MODE_OPER to
   blink the led, and LED_MODE_OFF to set the led off.*/
u8 bnx2x_set_led(struct bnx2x *bp, u8 port, u8 mode, u32 speed,
	       u16 hw_led_mode, u32 chip_id);
#define LED_MODE_OFF	0
#define LED_MODE_OPER 	2

u8 bnx2x_override_led_value(struct bnx2x *bp, u8 port, u32 led_idx, u32 value);

u8 bnx2x_flash_download(struct bnx2x *bp, u8 port, u32 ext_phy_config,
		      u8 driver_loaded, char data[], u32 size);
/* bnx2x_handle_module_detect_int should be called upon module detection
   interrupt */
void bnx2x_handle_module_detect_int(struct link_params *params);

/* Get the actual link status. In case it returns 0, link is up,
	otherwise link is down*/
u8 bnx2x_test_link(struct link_params *input, struct link_vars *vars);

/* One-time initialization for external phy after power up */
u8 bnx2x_common_init_phy(struct bnx2x *bp, u32 shmem_base);


#endif /* BNX2X_LINK_H */