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lx_core.h

/* -*- 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_readbuf(struct lx6464es *chip, int port, u32 *data, u32 len);
void lx_dsp_reg_write(struct lx6464es *chip, int port, unsigned data);
void lx_dsp_reg_writebuf(struct lx6464es *chip, int port, const u32 *data,
                   u32 len);

/* 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 __devinit 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, u8 *mac_address);


/* 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 */

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