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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2006 Freescale Semiconductor, Inc. All rights reserved.
*
* Authors: Shlomi Gridish <[email protected]>
* Li Yang <[email protected]>
*
* Description:
* Internal header file for UCC SLOW unit routines.
*/
#ifndef __UCC_SLOW_H__
#define __UCC_SLOW_H__
#include <linux/kernel.h>
#include <soc/fsl/qe/immap_qe.h>
#include <soc/fsl/qe/qe.h>
#include <soc/fsl/qe/ucc.h>
/* transmit BD's status */
#define T_R 0x80000000 /* ready bit */
#define T_PAD 0x40000000 /* add pads to short frames */
#define T_W 0x20000000 /* wrap bit */
#define T_I 0x10000000 /* interrupt on completion */
#define T_L 0x08000000 /* last */
#define T_A 0x04000000 /* Address - the data transmitted as address
chars */
#define T_TC 0x04000000 /* transmit CRC */
#define T_CM 0x02000000 /* continuous mode */
#define T_DEF 0x02000000 /* collision on previous attempt to transmit */
#define T_P 0x01000000 /* Preamble - send Preamble sequence before
data */
#define T_HB 0x01000000 /* heartbeat */
#define T_NS 0x00800000 /* No Stop */
#define T_LC 0x00800000 /* late collision */
#define T_RL 0x00400000 /* retransmission limit */
#define T_UN 0x00020000 /* underrun */
#define T_CT 0x00010000 /* CTS lost */
#define T_CSL 0x00010000 /* carrier sense lost */
#define T_RC 0x003c0000 /* retry count */
/* Receive BD's status */
#define R_E 0x80000000 /* buffer empty */
#define R_W 0x20000000 /* wrap bit */
#define R_I 0x10000000 /* interrupt on reception */
#define R_L 0x08000000 /* last */
#define R_C 0x08000000 /* the last byte in this buffer is a cntl
char */
#define R_F 0x04000000 /* first */
#define R_A 0x04000000 /* the first byte in this buffer is address
byte */
#define R_CM 0x02000000 /* continuous mode */
#define R_ID 0x01000000 /* buffer close on reception of idles */
#define R_M 0x01000000 /* Frame received because of promiscuous
mode */
#define R_AM 0x00800000 /* Address match */
#define R_DE 0x00800000 /* Address match */
#define R_LG 0x00200000 /* Break received */
#define R_BR 0x00200000 /* Frame length violation */
#define R_NO 0x00100000 /* Rx Non Octet Aligned Packet */
#define R_FR 0x00100000 /* Framing Error (no stop bit) character
received */
#define R_PR 0x00080000 /* Parity Error character received */
#define R_AB 0x00080000 /* Frame Aborted */
#define R_SH 0x00080000 /* frame is too short */
#define R_CR 0x00040000 /* CRC Error */
#define R_OV 0x00020000 /* Overrun */
#define R_CD 0x00010000 /* CD lost */
#define R_CL 0x00010000 /* this frame is closed because of a
collision */
/* Rx Data buffer must be 4 bytes aligned in most cases.*/
#define UCC_SLOW_RX_ALIGN 4
#define UCC_SLOW_MRBLR_ALIGNMENT 4
#define UCC_SLOW_PRAM_SIZE 0x100
#define ALIGNMENT_OF_UCC_SLOW_PRAM 64
/* UCC Slow Channel Protocol Mode */
enum ucc_slow_channel_protocol_mode {
UCC_SLOW_CHANNEL_PROTOCOL_MODE_QMC = 0x00000002,
UCC_SLOW_CHANNEL_PROTOCOL_MODE_UART = 0x00000004,
UCC_SLOW_CHANNEL_PROTOCOL_MODE_BISYNC = 0x00000008,
};
/* UCC Slow Transparent Transmit CRC (TCRC) */
enum ucc_slow_transparent_tcrc {
/* 16-bit CCITT CRC (HDLC). (X16 + X12 + X5 + 1) */
UCC_SLOW_TRANSPARENT_TCRC_CCITT_CRC16 = 0x00000000,
/* CRC16 (BISYNC). (X16 + X15 + X2 + 1) */
UCC_SLOW_TRANSPARENT_TCRC_CRC16 = 0x00004000,
/* 32-bit CCITT CRC (Ethernet and HDLC) */
UCC_SLOW_TRANSPARENT_TCRC_CCITT_CRC32 = 0x00008000,
};
/* UCC Slow oversampling rate for transmitter (TDCR) */
enum ucc_slow_tx_oversampling_rate {
/* 1x clock mode */
UCC_SLOW_OVERSAMPLING_RATE_TX_TDCR_1 = 0x00000000,
/* 8x clock mode */
UCC_SLOW_OVERSAMPLING_RATE_TX_TDCR_8 = 0x00010000,
/* 16x clock mode */
UCC_SLOW_OVERSAMPLING_RATE_TX_TDCR_16 = 0x00020000,
/* 32x clock mode */
UCC_SLOW_OVERSAMPLING_RATE_TX_TDCR_32 = 0x00030000,
};
/* UCC Slow Oversampling rate for receiver (RDCR)
*/
enum ucc_slow_rx_oversampling_rate {
/* 1x clock mode */
UCC_SLOW_OVERSAMPLING_RATE_RX_RDCR_1 = 0x00000000,
/* 8x clock mode */
UCC_SLOW_OVERSAMPLING_RATE_RX_RDCR_8 = 0x00004000,
/* 16x clock mode */
UCC_SLOW_OVERSAMPLING_RATE_RX_RDCR_16 = 0x00008000,
/* 32x clock mode */
UCC_SLOW_OVERSAMPLING_RATE_RX_RDCR_32 = 0x0000c000,
};
/* UCC Slow Transmitter encoding method (TENC)
*/
enum ucc_slow_tx_encoding_method {
UCC_SLOW_TRANSMITTER_ENCODING_METHOD_TENC_NRZ = 0x00000000,
UCC_SLOW_TRANSMITTER_ENCODING_METHOD_TENC_NRZI = 0x00000100
};
/* UCC Slow Receiver decoding method (RENC)
*/
enum ucc_slow_rx_decoding_method {
UCC_SLOW_RECEIVER_DECODING_METHOD_RENC_NRZ = 0x00000000,
UCC_SLOW_RECEIVER_DECODING_METHOD_RENC_NRZI = 0x00000800
};
/* UCC Slow Diagnostic mode (DIAG)
*/
enum ucc_slow_diag_mode {
UCC_SLOW_DIAG_MODE_NORMAL = 0x00000000,
UCC_SLOW_DIAG_MODE_LOOPBACK = 0x00000040,
UCC_SLOW_DIAG_MODE_ECHO = 0x00000080,
UCC_SLOW_DIAG_MODE_LOOPBACK_ECHO = 0x000000c0
};
struct ucc_slow_info {
int ucc_num;
int protocol; /* QE_CR_PROTOCOL_xxx */
enum qe_clock rx_clock;
enum qe_clock tx_clock;
phys_addr_t regs;
int irq;
u16 uccm_mask;
int data_mem_part;
int init_tx;
int init_rx;
u32 tx_bd_ring_len;
u32 rx_bd_ring_len;
int rx_interrupts;
int brkpt_support;
int grant_support;
int tsa;
int cdp;
int cds;
int ctsp;
int ctss;
int rinv;
int tinv;
int rtsm;
int rfw;
int tci;
int tend;
int tfl;
int txsy;
u16 max_rx_buf_length;
enum ucc_slow_transparent_tcrc tcrc;
enum ucc_slow_channel_protocol_mode mode;
enum ucc_slow_diag_mode diag;
enum ucc_slow_tx_oversampling_rate tdcr;
enum ucc_slow_rx_oversampling_rate rdcr;
enum ucc_slow_tx_encoding_method tenc;
enum ucc_slow_rx_decoding_method renc;
};
struct ucc_slow_private {
struct ucc_slow_info *us_info;
struct ucc_slow __iomem *us_regs; /* Ptr to memory map of UCC regs */
struct ucc_slow_pram __iomem *us_pram; /* a pointer to the parameter RAM */
s32 us_pram_offset;
int enabled_tx; /* Whether channel is enabled for Tx (ENT) */
int enabled_rx; /* Whether channel is enabled for Rx (ENR) */
int stopped_tx; /* Whether channel has been stopped for Tx
(STOP_TX, etc.) */
int stopped_rx; /* Whether channel has been stopped for Rx */
struct list_head confQ; /* frames passed to chip waiting for tx */
u32 first_tx_bd_mask; /* mask is used in Tx routine to save status
and length for first BD in a frame */
s32 tx_base_offset; /* first BD in Tx BD table offset (In MURAM) */
s32 rx_base_offset; /* first BD in Rx BD table offset (In MURAM) */
struct qe_bd __iomem *confBd; /* next BD for confirm after Tx */
struct qe_bd __iomem *tx_bd; /* next BD for new Tx request */
struct qe_bd __iomem *rx_bd; /* next BD to collect after Rx */
void *p_rx_frame; /* accumulating receive frame */
__be16 __iomem *p_ucce; /* a pointer to the event register in memory */
__be16 __iomem *p_uccm; /* a pointer to the mask register in memory */
u16 saved_uccm; /* a saved mask for the RX Interrupt bits */
#ifdef STATISTICS
u32 tx_frames; /* Transmitted frames counters */
u32 rx_frames; /* Received frames counters (only frames
passed to application) */
u32 rx_discarded; /* Discarded frames counters (frames that
were discarded by the driver due to
errors) */
#endif /* STATISTICS */
};
/* ucc_slow_init
* Initializes Slow UCC according to provided parameters.
*
* us_info - (In) pointer to the slow UCC info structure.
* uccs_ret - (Out) pointer to the slow UCC structure.
*/
int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** uccs_ret);
/* ucc_slow_free
* Frees all resources for slow UCC.
*
* uccs - (In) pointer to the slow UCC structure.
*/
void ucc_slow_free(struct ucc_slow_private * uccs);
/* ucc_slow_enable
* Enables a fast UCC port.
* This routine enables Tx and/or Rx through the General UCC Mode Register.
*
* uccs - (In) pointer to the slow UCC structure.
* mode - (In) TX, RX, or both.
*/
void ucc_slow_enable(struct ucc_slow_private * uccs, enum comm_dir mode);
/* ucc_slow_disable
* Disables a fast UCC port.
* This routine disables Tx and/or Rx through the General UCC Mode Register.
*
* uccs - (In) pointer to the slow UCC structure.
* mode - (In) TX, RX, or both.
*/
void ucc_slow_disable(struct ucc_slow_private * uccs, enum comm_dir mode);
/* ucc_slow_graceful_stop_tx
* Smoothly stops transmission on a specified slow UCC.
*
* uccs - (In) pointer to the slow UCC structure.
*/
void ucc_slow_graceful_stop_tx(struct ucc_slow_private * uccs);
/* ucc_slow_stop_tx
* Stops transmission on a specified slow UCC.
*
* uccs - (In) pointer to the slow UCC structure.
*/
void ucc_slow_stop_tx(struct ucc_slow_private * uccs);
/* ucc_slow_restart_tx
* Restarts transmitting on a specified slow UCC.
*
* uccs - (In) pointer to the slow UCC structure.
*/
void ucc_slow_restart_tx(struct ucc_slow_private *uccs);
u32 ucc_slow_get_qe_cr_subblock(int uccs_num);
#endif /* __UCC_SLOW_H__ */
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