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xwidget.h

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * xwidget.h - generic crosstalk widget header file, derived from IRIX
 * <sys/xtalk/xtalkwidget.h>, revision 1.32.
 *
 * Copyright (C) 1996, 1999 Silcon Graphics, Inc.
 * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
 */
#ifndef _ASM_XTALK_XWIDGET_H
#define _ASM_XTALK_XWIDGET_H

#include <linux/types.h>
#include <asm/xtalk/xtalk.h>

#define WIDGET_ID             0x04
#define WIDGET_STATUS               0x0c
#define WIDGET_ERR_UPPER_ADDR       0x14
#define WIDGET_ERR_LOWER_ADDR       0x1c
#define WIDGET_CONTROL              0x24
#define WIDGET_REQ_TIMEOUT          0x2c
#define WIDGET_INTDEST_UPPER_ADDR   0x34
#define WIDGET_INTDEST_LOWER_ADDR   0x3c
#define WIDGET_ERR_CMD_WORD         0x44
#define WIDGET_LLP_CFG              0x4c
#define WIDGET_TFLUSH               0x54

/* WIDGET_ID */
#define WIDGET_REV_NUM              0xf0000000
#define WIDGET_PART_NUM             0x0ffff000
#define WIDGET_MFG_NUM              0x00000ffe
#define WIDGET_REV_NUM_SHFT         28
#define WIDGET_PART_NUM_SHFT        12
#define WIDGET_MFG_NUM_SHFT         1

#define XWIDGET_PART_NUM(widgetid) (((widgetid) & WIDGET_PART_NUM) >> WIDGET_PART_NUM_SHFT)
#define XWIDGET_REV_NUM(widgetid) (((widgetid) & WIDGET_REV_NUM) >> WIDGET_REV_NUM_SHFT)
#define XWIDGET_MFG_NUM(widgetid) (((widgetid) & WIDGET_MFG_NUM) >> WIDGET_MFG_NUM_SHFT)

/* WIDGET_STATUS */
#define WIDGET_LLP_REC_CNT          0xff000000
#define WIDGET_LLP_TX_CNT           0x00ff0000
#define WIDGET_PENDING              0x0000001f

/* WIDGET_ERR_UPPER_ADDR */
#define     WIDGET_ERR_UPPER_ADDR_ONLY    0x0000ffff

/* WIDGET_CONTROL */
#define WIDGET_F_BAD_PKT            0x00010000
#define WIDGET_LLP_XBAR_CRD         0x0000f000
#define     WIDGET_LLP_XBAR_CRD_SHFT      12
#define WIDGET_CLR_RLLP_CNT         0x00000800
#define WIDGET_CLR_TLLP_CNT         0x00000400
#define WIDGET_SYS_END              0x00000200
#define WIDGET_MAX_TRANS            0x000001f0
#define WIDGET_WIDGET_ID            0x0000000f

/* WIDGET_INTDEST_UPPER_ADDR */
#define WIDGET_INT_VECTOR           0xff000000
#define WIDGET_INT_VECTOR_SHFT            24
#define WIDGET_TARGET_ID            0x000f0000
#define WIDGET_TARGET_ID_SHFT       16
#define WIDGET_UPP_ADDR             0x0000ffff

/* WIDGET_ERR_CMD_WORD */
#define WIDGET_DIDN                 0xf0000000
#define WIDGET_SIDN                 0x0f000000
#define WIDGET_PACTYP               0x00f00000
#define WIDGET_TNUM                 0x000f8000
#define WIDGET_COHERENT             0x00004000
#define WIDGET_DS             0x00003000
#define WIDGET_GBR                  0x00000800
#define WIDGET_VBPM                 0x00000400
#define WIDGET_ERROR                0x00000200
#define WIDGET_BARRIER              0x00000100

/* WIDGET_LLP_CFG */
#define WIDGET_LLP_MAXRETRY         0x03ff0000
#define WIDGET_LLP_MAXRETRY_SHFT    16
#define WIDGET_LLP_NULLTIMEOUT            0x0000fc00
#define WIDGET_LLP_NULLTIMEOUT_SHFT 10
#define WIDGET_LLP_MAXBURST         0x000003ff
#define WIDGET_LLP_MAXBURST_SHFT    0

/*
 * according to the crosstalk spec, only 32-bits access to the widget
 * configuration registers is allowed.  some widgets may allow 64-bits
 * access but software should not depend on it.  registers beyond the
 * widget target flush register are widget dependent thus will not be
 * defined here
 */
#ifndef __ASSEMBLY__
typedef u32 widgetreg_t;

/* widget configuration registers */
typedef volatile struct widget_cfg {
      widgetreg_t       w_pad_0;          /* 0x00 */
      widgetreg_t       w_id;             /* 0x04 */
      widgetreg_t       w_pad_1;          /* 0x08 */
      widgetreg_t       w_status;         /* 0x0c */
      widgetreg_t       w_pad_2;          /* 0x10 */
      widgetreg_t       w_err_upper_addr; /* 0x14 */
      widgetreg_t       w_pad_3;          /* 0x18 */
      widgetreg_t       w_err_lower_addr; /* 0x1c */
      widgetreg_t       w_pad_4;          /* 0x20 */
      widgetreg_t       w_control;        /* 0x24 */
      widgetreg_t       w_pad_5;          /* 0x28 */
      widgetreg_t       w_req_timeout;          /* 0x2c */
      widgetreg_t       w_pad_6;          /* 0x30 */
      widgetreg_t       w_intdest_upper_addr;   /* 0x34 */
      widgetreg_t       w_pad_7;          /* 0x38 */
      widgetreg_t       w_intdest_lower_addr;   /* 0x3c */
      widgetreg_t       w_pad_8;          /* 0x40 */
      widgetreg_t       w_err_cmd_word;         /* 0x44 */
      widgetreg_t       w_pad_9;          /* 0x48 */
      widgetreg_t       w_llp_cfg;        /* 0x4c */
      widgetreg_t       w_pad_10;         /* 0x50 */
      widgetreg_t       w_tflush;         /* 0x54 */
} widget_cfg_t;

typedef struct {
      unsigned    didn:4;
      unsigned    sidn:4;
      unsigned    pactyp:4;
      unsigned    tnum:5;
      unsigned    ct:1;
      unsigned    ds:2;
      unsigned    gbr:1;
      unsigned    vbpm:1;
      unsigned    error:1;
      unsigned    bo:1;
      unsigned    other:8;
} w_err_cmd_word_f;

typedef union {
      widgetreg_t       r;
      w_err_cmd_word_f  f;
} w_err_cmd_word_u;

typedef struct xwidget_info_s *xwidget_info_t;

/*
 * Crosstalk Widget Hardware Identification, as defined in the Crosstalk spec.
 */
typedef struct xwidget_hwid_s {
      xwidget_part_num_t      part_num;
      xwidget_rev_num_t rev_num;
      xwidget_mfg_num_t mfg_num;
} *xwidget_hwid_t;


/*
 * Returns 1 if a driver that handles devices described by hwid1 is able
 * to manage a device with hardwareid hwid2.  NOTE: We don't check rev
 * numbers at all.
 */
#define XWIDGET_HARDWARE_ID_MATCH(hwid1, hwid2) \
      (((hwid1)->part_num == (hwid2)->part_num) && \
      (((hwid1)->mfg_num == XWIDGET_MFG_NUM_NONE) || \
      ((hwid2)->mfg_num == XWIDGET_MFG_NUM_NONE) || \
      ((hwid1)->mfg_num == (hwid2)->mfg_num)))

#endif /* !__ASSEMBLY__ */

#endif /* _ASM_XTALK_XWIDGET_H */

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