/* -*- linux-c -*- *
 *
 * ALSA driver for the digigram lx6464es interface
 * low-level interface
 *
 * Copyright (c) 2009 Tim Blechmann <tim@klingt.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 */

#ifndef LX_CORE_H
#define LX_CORE_H

#include <linux/interrupt.h>

#include "lx_defs.h"

#define REG_CRM_NUMBER		12

struct lx6464es;

/* low-level register access */

/* dsp register access */
enum {
	eReg_BASE,
	eReg_CSM,
	eReg_CRM1,
	eReg_CRM2,
	eReg_CRM3,
	eReg_CRM4,
	eReg_CRM5,
	eReg_CRM6,
	eReg_CRM7,
	eReg_CRM8,
	eReg_CRM9,
	eReg_CRM10,
	eReg_CRM11,
	eReg_CRM12,

	eReg_ICR,
	eReg_CVR,
	eReg_ISR,
	eReg_RXHTXH,
	eReg_RXMTXM,
	eReg_RHLTXL,
	eReg_RESETDSP,

	eReg_CSUF,
	eReg_CSES,
	eReg_CRESMSB,
	eReg_CRESLSB,
	eReg_ADMACESMSB,
	eReg_ADMACESLSB,
	eReg_CONFES,

	eMaxPortLx
};

unsigned long lx_dsp_reg_read(struct lx6464es *chip, int port);
void lx_dsp_reg_write(struct lx6464es *chip, int port, unsigned data);

/* plx register access */
enum {
    ePLX_PCICR,

    ePLX_MBOX0,
    ePLX_MBOX1,
    ePLX_MBOX2,
    ePLX_MBOX3,
    ePLX_MBOX4,
    ePLX_MBOX5,
    ePLX_MBOX6,
    ePLX_MBOX7,

    ePLX_L2PCIDB,
    ePLX_IRQCS,
    ePLX_CHIPSC,

    eMaxPort
};

unsigned long lx_plx_reg_read(struct lx6464es *chip, int port);
void lx_plx_reg_write(struct lx6464es *chip, int port, u32 data);

/* rhm */
struct lx_rmh {
	u16	cmd_len;	/* length of the command to send (WORDs) */
	u16	stat_len;	/* length of the status received (WORDs) */
	u16	dsp_stat;	/* status type, RMP_SSIZE_XXX */
	u16	cmd_idx;	/* index of the command */
	u32	cmd[REG_CRM_NUMBER];
	u32	stat[REG_CRM_NUMBER];
};


/* low-level dsp access */
int lx_dsp_get_version(struct lx6464es *chip, u32 *rdsp_version);
int lx_dsp_get_clock_frequency(struct lx6464es *chip, u32 *rfreq);
int lx_dsp_set_granularity(struct lx6464es *chip, u32 gran);
int lx_dsp_read_async_events(struct lx6464es *chip, u32 *data);
int lx_dsp_get_mac(struct lx6464es *chip);


/* low-level pipe handling */
int lx_pipe_allocate(struct lx6464es *chip, u32 pipe, int is_capture,
		     int channels);
int lx_pipe_release(struct lx6464es *chip, u32 pipe, int is_capture);
int lx_pipe_sample_count(struct lx6464es *chip, u32 pipe, int is_capture,
			 u64 *rsample_count);
int lx_pipe_state(struct lx6464es *chip, u32 pipe, int is_capture, u16 *rstate);
int lx_pipe_stop(struct lx6464es *chip, u32 pipe, int is_capture);
int lx_pipe_start(struct lx6464es *chip, u32 pipe, int is_capture);
int lx_pipe_pause(struct lx6464es *chip, u32 pipe, int is_capture);

int lx_pipe_wait_for_start(struct lx6464es *chip, u32 pipe, int is_capture);
int lx_pipe_wait_for_idle(struct lx6464es *chip, u32 pipe, int is_capture);

/* low-level stream handling */
int lx_stream_set_format(struct lx6464es *chip, struct snd_pcm_runtime *runtime,
			 u32 pipe, int is_capture);
int lx_stream_state(struct lx6464es *chip, u32 pipe, int is_capture,
		    int *rstate);
int lx_stream_sample_position(struct lx6464es *chip, u32 pipe, int is_capture,
			      u64 *r_bytepos);

int lx_stream_set_state(struct lx6464es *chip, u32 pipe,
			int is_capture, enum stream_state_t state);

static inline int lx_stream_start(struct lx6464es *chip, u32 pipe,
				  int is_capture)
{
	snd_printdd("->lx_stream_start\n");
	return lx_stream_set_state(chip, pipe, is_capture, SSTATE_RUN);
}

static inline int lx_stream_pause(struct lx6464es *chip, u32 pipe,
				  int is_capture)
{
	snd_printdd("->lx_stream_pause\n");
	return lx_stream_set_state(chip, pipe, is_capture, SSTATE_PAUSE);
}

static inline int lx_stream_stop(struct lx6464es *chip, u32 pipe,
				 int is_capture)
{
	snd_printdd("->lx_stream_stop\n");
	return lx_stream_set_state(chip, pipe, is_capture, SSTATE_STOP);
}

/* low-level buffer handling */
int lx_buffer_ask(struct lx6464es *chip, u32 pipe, int is_capture,
		  u32 *r_needed, u32 *r_freed, u32 *size_array);
int lx_buffer_give(struct lx6464es *chip, u32 pipe, int is_capture,
		   u32 buffer_size, u32 buf_address_lo, u32 buf_address_hi,
		   u32 *r_buffer_index);
int lx_buffer_free(struct lx6464es *chip, u32 pipe, int is_capture,
		   u32 *r_buffer_size);
int lx_buffer_cancel(struct lx6464es *chip, u32 pipe, int is_capture,
		     u32 buffer_index);

/* low-level gain/peak handling */
int lx_level_unmute(struct lx6464es *chip, int is_capture, int unmute);
int lx_level_peaks(struct lx6464es *chip, int is_capture, int channels,
		   u32 *r_levels);


/* interrupt handling */
irqreturn_t lx_interrupt(int irq, void *dev_id);
void lx_irq_enable(struct lx6464es *chip);
void lx_irq_disable(struct lx6464es *chip);

void lx_tasklet_capture(unsigned long data);
void lx_tasklet_playback(unsigned long data);


/* Stream Format Header Defines (for LIN and IEEE754) */
#define HEADER_FMT_BASE		HEADER_FMT_BASE_LIN
#define HEADER_FMT_BASE_LIN	0xFED00000
#define HEADER_FMT_BASE_FLOAT	0xFAD00000
#define HEADER_FMT_MONO		0x00000080 /* bit 23 in header_lo. WARNING: old
					    * bit 22 is ignored in float
					    * format */
#define HEADER_FMT_INTEL	0x00008000
#define HEADER_FMT_16BITS	0x00002000
#define HEADER_FMT_24BITS	0x00004000
#define HEADER_FMT_UPTO11	0x00000200 /* frequency is less or equ. to 11k.
					    * */
#define HEADER_FMT_UPTO32	0x00000100 /* frequency is over 11k and less
					    * then 32k.*/


#define BIT_FMP_HEADER          23
#define BIT_FMP_SD              22
#define BIT_FMP_MULTICHANNEL    19

#define START_STATE             1
#define PAUSE_STATE             0


/* from PcxAll_e.h */
/* Start/Pause condition for pipes (PCXStartPipe, PCXPausePipe) */
#define START_PAUSE_IMMEDIATE           0
#define START_PAUSE_ON_SYNCHRO          1
#define START_PAUSE_ON_TIME_CODE        2


/* Pipe / Stream state */
#define START_STATE             1
#define PAUSE_STATE             0

static inline void unpack_pointer(dma_addr_t ptr, u32 *r_low, u32 *r_high)
{
	*r_low = (u32)(ptr & 0xffffffff);
#if BITS_PER_LONG == 32
	*r_high = 0;
#else
	*r_high = (u32)((u64)ptr>>32);
#endif
}

#endif /* LX_CORE_H */