Patch by Pantelis Antoniou, 5 May 2004:

[oweals/u-boot.git] / board / netta / codec.c

/*
 * CODEC
 */

#include <common.h>
#include <post.h>

#include "mpc8xx.h"

/***********************************************/

#define MAX_DUSLIC      4

#define NUM_CHANNELS    2
#define MAX_SLICS       (MAX_DUSLIC * NUM_CHANNELS)

/***********************************************/

#define SOP_READ_CH_0           0xC4  /* Read SOP Register for Channel A  */
#define SOP_READ_CH_1           0xCC  /* Read SOP Register for Channel B  */
#define SOP_WRITE_CH_0          0x44  /* Write SOP Register for Channel A */
#define SOP_WRITE_CH_1          0x4C  /* Write SOP Register for Channel B */

#define COP_READ_CH_0           0xC5
#define COP_READ_CH_1           0xCD
#define COP_WRITE_CH_0          0x45
#define COP_WRITE_CH_1          0x4D

#define POP_READ_CH_0           0xC6
#define POP_READ_CH_1           0xCE
#define POP_WRITE_CH_0          0x46
#define POP_WRITE_CH_1          0x4E

#define RST_CMD_DUSLIC_CHIP     0x40  /* OR 0x48 */
#define RST_CMD_DUSLIC_CH_A     0x41
#define RST_CMD_DUSLIC_CH_B     0x49

#define PCM_RESYNC_CMD_CH_A     0x42
#define PCM_RESYNC_CMD_CH_B     0x4A

#define ACTIVE_HOOK_LEV_4       0
#define ACTIVE_HOOK_LEV_12      1

#define SLIC_P_NORMAL           0x01

/************************************************/

#define CODSP_WR        0x00
#define CODSP_RD        0x80
#define CODSP_OP        0x40
#define CODSP_ADR(x)    (((unsigned char)(x) & 7) << 3)
#define CODSP_M(x)      ((unsigned char)(x) & 7)
#define CODSP_CMD(x)    ((unsigned char)(x) & 7)

/************************************************/

/* command indication ops */
#define CODSP_M_SLEEP_PWRDN     7
#define CODSP_M_PWRDN_HIZ       0
#define CODSP_M_ANY_ACT         2
#define CODSP_M_RING            5
#define CODSP_M_ACT_MET         6
#define CODSP_M_GND_START       4
#define CODSP_M_RING_PAUSE      1

/* single byte commands */
#define CODSP_CMD_SOFT_RESET    CODSP_CMD(0)
#define CODSP_CMD_RESET_CH      CODSP_CMD(1)
#define CODSP_CMD_RESYNC        CODSP_CMD(2)

/* two byte commands */
#define CODSP_CMD_SOP           CODSP_CMD(4)
#define CODSP_CMD_COP           CODSP_CMD(5)
#define CODSP_CMD_POP           CODSP_CMD(6)

/************************************************/

/* read as 4-bytes */
#define CODSP_INTREG_INT_CH     0x80000000
#define CODSP_INTREG_HOOK       0x40000000
#define CODSP_INTREG_GNDK       0x20000000
#define CODSP_INTREG_GNDP       0x10000000
#define CODSP_INTREG_ICON       0x08000000
#define CODSP_INTREG_VRTLIM     0x04000000
#define CODSP_INTREG_OTEMP      0x02000000
#define CODSP_INTREG_SYNC_FAIL  0x01000000
#define CODSP_INTREG_LM_THRES   0x00800000
#define CODSP_INTREG_READY      0x00400000
#define CODSP_INTREG_RSTAT      0x00200000
#define CODSP_INTREG_LM_OK      0x00100000
#define CODSP_INTREG_IO4_DU     0x00080000
#define CODSP_INTREG_IO3_DU     0x00040000
#define CODSP_INTREG_IO2_DU     0x00020000
#define CODSP_INTREG_IO1_DU     0x00010000
#define CODSP_INTREG_DTMF_OK    0x00008000
#define CODSP_INTREG_DTMF_KEY4  0x00004000
#define CODSP_INTREG_DTMF_KEY3  0x00002000
#define CODSP_INTREG_DTMF_KEY2  0x00001000
#define CODSP_INTREG_DTMF_KEY1  0x00000800
#define CODSP_INTREG_DTMF_KEY0  0x00000400
#define CODSP_INTREG_UTDR_OK    0x00000200
#define CODSP_INTREG_UTDX_OK    0x00000100
#define CODSP_INTREG_EDSP_FAIL  0x00000080
#define CODSP_INTREG_CIS_BOF    0x00000008
#define CODSP_INTREG_CIS_BUF    0x00000004
#define CODSP_INTREG_CIS_REQ    0x00000002
#define CODSP_INTREG_CIS_ACT    0x00000001

/************************************************/

/* ======== SOP REG ADDRESSES =======*/

#define REVISION_ADDR           0x00
#define PCMC1_ADDR              0x05
#define XCR_ADDR                0x06
#define INTREG1_ADDR            0x07
#define INTREG2_ADDR            0x08
#define INTREG3_ADDR            0x09
#define INTREG4_ADDR            0x0A
#define LMRES1_ADDR             0x0D
#define MASK_ADDR               0x11
#define IOCTL3_ADDR             0x14
#define BCR1_ADDR               0x15
#define BCR2_ADDR               0x16
#define BCR3_ADDR               0x17
#define BCR4_ADDR               0x18
#define BCR5_ADDR               0x19
#define DSCR_ADDR               0x1A
#define LMCR1_ADDR              0x1C
#define LMCR2_ADDR              0x1D
#define LMCR3_ADDR              0x1E
#define OFR1_ADDR               0x1F
#define PCMR1_ADDR              0x21
#define PCMX1_ADDR              0x25
#define TSTR3_ADDR              0x2B
#define TSTR4_ADDR              0x2C
#define TSTR5_ADDR              0x2D

/* ========= POP REG ADDRESSES ========*/

#define CIS_DAT_ADDR            0x00

#define LEC_LEN_ADDR            0x3A
#define LEC_POWR_ADDR           0x3B
#define LEC_DELP_ADDR           0x3C
#define LEC_DELQ_ADDR           0x3D
#define LEC_GAIN_XI_ADDR        0x3E
#define LEC_GAIN_RI_ADDR        0x3F
#define LEC_GAIN_XO_ADDR        0x40
#define LEC_RES_1_ADDR          0x41
#define LEC_RES_2_ADDR          0x42

#define NLP_POW_LPF_ADDR        0x30
#define NLP_POW_LPS_ADDR        0x31
#define NLP_BN_LEV_X_ADDR       0x32
#define NLP_BN_LEV_R_ADDR       0x33
#define NLP_BN_INC_ADDR         0x34
#define NLP_BN_DEC_ADDR         0x35
#define NLP_BN_MAX_ADDR         0x36
#define NLP_BN_ADJ_ADDR         0x37
#define NLP_RE_MIN_ERLL_ADDR    0x38
#define NLP_RE_EST_ERLL_ADDR    0x39
#define NLP_SD_LEV_X_ADDR       0x3A
#define NLP_SD_LEV_R_ADDR       0x3B
#define NLP_SD_LEV_BN_ADDR      0x3C
#define NLP_SD_LEV_RE_ADDR      0x3D
#define NLP_SD_OT_DT_ADDR       0x3E
#define NLP_ERL_LIN_LP_ADDR     0x3F
#define NLP_ERL_LEC_LP_ADDR     0x40
#define NLP_CT_LEV_RE_ADDR      0x41
#define NLP_CTRL_ADDR           0x42

#define UTD_CF_H_ADDR           0x4B
#define UTD_CF_L_ADDR           0x4C
#define UTD_BW_H_ADDR           0x4D
#define UTD_BW_L_ADDR           0x4E
#define UTD_NLEV_ADDR           0x4F
#define UTD_SLEV_H_ADDR         0x50
#define UTD_SLEV_L_ADDR         0x51
#define UTD_DELT_ADDR           0x52
#define UTD_RBRK_ADDR           0x53
#define UTD_RTIME_ADDR          0x54
#define UTD_EBRK_ADDR           0x55
#define UTD_ETIME_ADDR          0x56

#define DTMF_LEV_ADDR           0x30
#define DTMF_TWI_ADDR           0x31
#define DTMF_NCF_H_ADDR         0x32
#define DTMF_NCF_L_ADDR         0x33
#define DTMF_NBW_H_ADDR         0x34
#define DTMF_NBW_L_ADDR         0x35
#define DTMF_GAIN_ADDR          0x36
#define DTMF_RES1_ADDR          0x37
#define DTMF_RES2_ADDR          0x38
#define DTMF_RES3_ADDR          0x39

#define CIS_LEV_H_ADDR          0x43
#define CIS_LEV_L_ADDR          0x44
#define CIS_BRS_ADDR            0x45
#define CIS_SEIZ_H_ADDR         0x46
#define CIS_SEIZ_L_ADDR         0x47
#define CIS_MARK_H_ADDR         0x48
#define CIS_MARK_L_ADDR         0x49
#define CIS_LEC_MODE_ADDR       0x4A

/*=====================================*/

#define HOOK_LEV_ACT_START_ADDR 0x89
#define RO1_START_ADDR          0x70
#define RO2_START_ADDR          0x95
#define RO3_START_ADDR          0x96

#define TG1_FREQ_START_ADDR     0x38
#define TG1_GAIN_START_ADDR     0x39
#define TG1_BANDPASS_START_ADDR 0x3B
#define TG1_BANDPASS_END_ADDR   0x3D

#define TG2_FREQ_START_ADDR     0x40
#define TG2_GAIN_START_ADDR     0x41
#define TG2_BANDPASS_START_ADDR 0x43
#define TG2_BANDPASS_END_ADDR   0x45

/*====================================*/

#define PCM_HW_B                0x80
#define PCM_HW_A                0x00
#define PCM_TIME_SLOT_0         0x00   /*  Byte 0 of PCM Frame (by default is assigned to channel A ) */
#define PCM_TIME_SLOT_1         0x01   /*  Byte 1 of PCM Frame (by default is assigned to channel B ) */
#define PCM_TIME_SLOT_4         0x04   /*  Byte 4 of PCM Frame (Corresponds to B1 of the Second GCI ) */

#define  RX_LEV_ADDR    0x28
#define  TX_LEV_ADDR    0x30
#define  Ik1_ADDR       0x83

#define  AR_ROW         3 /* Is the row (AR Params) of the ac_Coeff array in SMS_CODEC_Defaults struct  */
#define  AX_ROW         6 /* Is the row (AX Params) of the ac_Coeff array in SMS_CODEC_Defaults struct  */
#define  DCF_ROW        0 /* Is the row (DCF Params) of the dc_Coeff array in SMS_CODEC_Defaults struct */

/* Mark the start byte of Duslic parameters that we use with configurator */
#define  Ik1_START_BYTE         3
#define  RX_LEV_START_BYTE      0
#define  TX_LEV_START_BYTE      0

/************************************************/

#define INTREG4_CIS_ACT         (1 << 0)

#define BCR1_SLEEP              0x20
#define BCR1_REVPOL             0x10
#define BCR1_ACTR               0x08
#define BCR1_ACTL               0x04
#define BCR1_SLIC_MASK          0x03

#define BCR2_HARD_POL_REV       0x40
#define BCR2_TTX                0x20
#define BCR2_TTX_12K            0x10
#define BCR2_HIMAN              0x08
#define BCR2_PDOT               0x01

#define BCR3_PCMX_EN            (1 << 4)

#define BCR5_DTMF_EN            (1 << 0)
#define BCR5_DTMF_SRC           (1 << 1)
#define BCR5_LEC_EN             (1 << 2)
#define BCR5_LEC_OUT            (1 << 3)
#define BCR5_CIS_EN             (1 << 4)
#define BCR5_CIS_AUTO           (1 << 5)
#define BCR5_UTDX_EN            (1 << 6)
#define BCR5_UTDR_EN            (1 << 7)

#define DSCR_TG1_EN             (1 << 0)
#define DSCR_TG2_EN             (1 << 1)
#define DSCR_PTG                (1 << 2)
#define DSCR_COR8               (1 << 3)
#define DSCR_DG_KEY(x)          (((x) & 0x0F) << 4)

#define CIS_LEC_MODE_CIS_V23    (1 << 0)
#define CIS_LEC_MODE_CIS_FRM    (1 << 1)
#define CIS_LEC_MODE_NLP_EN     (1 << 2)
#define CIS_LEC_MODE_UTDR_SUM   (1 << 4)
#define CIS_LEC_MODE_UTDX_SUM   (1 << 5)
#define CIS_LEC_MODE_LEC_FREEZE (1 << 6)
#define CIS_LEC_MODE_LEC_ADAPT  (1 << 7)

#define TSTR4_COR_64            (1 << 5)

#define TSTR3_AC_DLB_8K         (1 << 2)
#define TSTR3_AC_DLB_32K        (1 << 3)
#define TSTR3_AC_DLB_4M         (1 << 5)


#define LMCR1_TEST_EN           (1 << 7)
#define LMCR1_LM_EN             (1 << 6)
#define LMCR1_LM_THM            (1 << 5)
#define LMCR1_LM_ONCE           (1 << 2)
#define LMCR1_LM_MASK           (1 << 1)

#define LMCR2_LM_RECT                   (1 << 5)
#define LMCR2_LM_SEL_VDD                0x0D
#define LMCR2_LM_SEL_IO3                0x0A
#define LMCR2_LM_SEL_IO4                0x0B
#define LMCR2_LM_SEL_IO4_MINUS_IO3      0x0F

#define LMCR3_RTR_SEL           (1 << 6)

#define LMCR3_RNG_OFFSET_NONE   0x00
#define LMCR3_RNG_OFFSET_1      0x01
#define LMCR3_RNG_OFFSET_2      0x02
#define LMCR3_RNG_OFFSET_3      0x03

#define TSTR5_DC_HOLD           (1 << 3)

/************************************************/

#define TARGET_ONHOOK_BATH_x100         4600    /* 46.0 Volt */
#define TARGET_ONHOOK_BATL_x100         2500    /* 25.0 Volt */
#define TARGET_V_DIVIDER_RATIO_x100     21376L  /* (R1+R2)/R2 = 213.76 */
#define DIVIDER_RATIO_ACCURx100         (22 * 100)
#define V_AD_x10000                     10834L  /* VAD = 1.0834 */
#define TARGET_VDDx100                  330     /* VDD = 3.3 * 10 */
#define VDD_MAX_DIFFx100                20      /* VDD Accur = 0.2*100 */

#define RMS_MULTIPLIERx100              111     /* pi/(2xsqrt(2)) = 1.11*/
#define K_INTDC_RECT_ON                 4       /* When Rectifier is ON this value is necessary(2^4) */
#define K_INTDC_RECT_OFF                2       /* 2^2 */
#define RNG_FREQ                        25
#define SAMPLING_FREQ                   (2000L)
#define N_SAMPLES                       (SAMPLING_FREQ/RNG_FREQ)     /* for Ring Freq =25Hz (40ms Integration Period)[Sampling rate 2KHz -->1 Sample every 500us] */
#define HOOK_THRESH_RING_START_ADDR     0x8B
#define RING_PARAMS_START_ADDR          0x70

#define V_OUT_BATH_MAX_DIFFx100         300     /* 3.0 x100 */
#define V_OUT_BATL_MAX_DIFFx100         400     /* 4.0 x100 */
#define MAX_V_RING_MEANx100             50
#define TARGET_V_RING_RMSx100           2720
#define V_RMS_RING_MAX_DIFFx100         250

#define LM_OK_SRC_IRG_2                 (1 << 4)

/************************************************/

#define PORTB           (((volatile immap_t *)CFG_IMMR)->im_cpm.cp_pbdat)
#define PORTC           (((volatile immap_t *)CFG_IMMR)->im_ioport.iop_pcdat)
#define PORTD           (((volatile immap_t *)CFG_IMMR)->im_ioport.iop_pddat)

#define _PORTD_SET(mask, state) \
        do { \
                if (state) \
                        PORTD |= mask; \
                else \
                        PORTD &= ~mask; \
        } while (0)

#define _PORTB_SET(mask, state) \
        do { \
                if (state) \
                        PORTB |= mask; \
                else \
                        PORTB &= ~mask; \
        } while (0)

#define _PORTB_TGL(mask) do { PORTB ^= mask; } while (0)
#define _PORTB_GET(mask) (!!(PORTB & mask))

#define _PORTC_GET(mask) (!!(PORTC & mask))

/* port B */
#define SPI_RXD         (1 << (31 - 28))
#define SPI_TXD         (1 << (31 - 29))
#define SPI_CLK         (1 << (31 - 30))

/* port C */
#define COM_HOOK1       (1 << (15 - 9))
#define COM_HOOK2       (1 << (15 - 10))

#ifndef CONFIG_NETTA_SWAPHOOK

#define COM_HOOK3       (1 << (15 - 11))
#define COM_HOOK4       (1 << (15 - 12))

#else

#define COM_HOOK3       (1 << (15 - 12))
#define COM_HOOK4       (1 << (15 - 11))

#endif

/* port D */
#define SPIENC1         (1 << (15 - 9))
#define SPIENC2         (1 << (15 - 10))
#define SPIENC3         (1 << (15 - 11))
#define SPIENC4         (1 << (15 - 14))

#define SPI_DELAY() udelay(1)

static inline unsigned int __SPI_Transfer(unsigned int tx)
{
        unsigned int rx;
        int b;

        rx = 0; b = 8;
        while (--b >= 0) {
                _PORTB_SET(SPI_TXD, tx & 0x80);
                tx <<= 1;
                _PORTB_TGL(SPI_CLK);
                SPI_DELAY();
                rx <<= 1;
                rx |= _PORTB_GET(SPI_RXD);
                _PORTB_TGL(SPI_CLK);
                SPI_DELAY();
        }

        return rx;
}

static const char *codsp_dtmf_map = "D1234567890*#ABC";

static const int spienc_mask_tab[4] = { SPIENC1, SPIENC2, SPIENC3, SPIENC4 };
static const int com_hook_mask_tab[4] = { COM_HOOK1, COM_HOOK2, COM_HOOK3, COM_HOOK4 };

static unsigned int codsp_send(int duslic_id, const unsigned char *cmd, int cmdlen, unsigned char *res, int reslen)
{
        unsigned int rx;
        int i;

        /* just some sanity checks */
        if (cmd == 0 || cmdlen < 0)
                return -1;

        _PORTD_SET(spienc_mask_tab[duslic_id], 0);

        /* first 2 bytes are without response */
        i = 2;
        while (i-- > 0 && cmdlen-- > 0)
                __SPI_Transfer(*cmd++);

        while (cmdlen-- > 0) {
                rx = __SPI_Transfer(*cmd++);
                if (res != 0 && reslen-- > 0)
                        *res++ = (unsigned char)rx;
        }
        if (res != 0) {
                while (reslen-- > 0)
                        *res++ = __SPI_Transfer(0xFF);
        }

        _PORTD_SET(spienc_mask_tab[duslic_id], 1);

        return 0;
}

/****************************************************************************/

void codsp_set_ciop_m(int duslic_id, int channel, unsigned char m)
{
        unsigned char cmd = CODSP_WR | CODSP_ADR(channel) | CODSP_M(m);
        codsp_send(duslic_id, &cmd, 1, 0, 0);
}

void codsp_reset_chip(int duslic_id)
{
        static const unsigned char cmd = CODSP_WR | CODSP_OP | CODSP_CMD_SOFT_RESET;
        codsp_send(duslic_id, &cmd, 1, 0, 0);
}

void codsp_reset_channel(int duslic_id, int channel)
{
        unsigned char cmd = CODSP_WR | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_RESET_CH;
        codsp_send(duslic_id, &cmd, 1, 0, 0);
}

void codsp_resync_channel(int duslic_id, int channel)
{
        unsigned char cmd = CODSP_WR | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_RESYNC;
        codsp_send(duslic_id, &cmd, 1, 0, 0);
}

/****************************************************************************/

void codsp_write_sop_char(int duslic_id, int channel, unsigned char regno, unsigned char val)
{
        unsigned char cmd[3];

        cmd[0] = CODSP_WR | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_SOP;
        cmd[1] = regno;
        cmd[2] = val;

        codsp_send(duslic_id, cmd, 3, 0, 0);
}

void codsp_write_sop_short(int duslic_id, int channel, unsigned char regno, unsigned short val)
{
        unsigned char cmd[4];

        cmd[0] = CODSP_WR | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_SOP;
        cmd[1] = regno;
        cmd[2] = (unsigned char)(val >> 8);
        cmd[3] = (unsigned char)val;

        codsp_send(duslic_id, cmd, 4, 0, 0);
}

void codsp_write_sop_int(int duslic_id, int channel, unsigned char regno, unsigned int val)
{
        unsigned char cmd[5];

        cmd[0] = CODSP_WR | CODSP_ADR(channel) | CODSP_CMD_SOP;
        cmd[1] = regno;
        cmd[2] = (unsigned char)(val >> 24);
        cmd[3] = (unsigned char)(val >> 16);
        cmd[4] = (unsigned char)(val >> 8);
        cmd[5] = (unsigned char)val;

        codsp_send(duslic_id, cmd, 6, 0, 0);
}

unsigned char codsp_read_sop_char(int duslic_id, int channel, unsigned char regno)
{
        unsigned char cmd[3];
        unsigned char res[2];

        cmd[0] = CODSP_RD | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_SOP;
        cmd[1] = regno;

        codsp_send(duslic_id, cmd, 2, res, 2);

        return res[1];
}

unsigned short codsp_read_sop_short(int duslic_id, int channel, unsigned char regno)
{
        unsigned char cmd[2];
        unsigned char res[3];

        cmd[0] = CODSP_RD | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_SOP;
        cmd[1] = regno;

        codsp_send(duslic_id, cmd, 2, res, 3);

        return ((unsigned short)res[1] << 8) | res[2];
}

unsigned int codsp_read_sop_int(int duslic_id, int channel, unsigned char regno)
{
        unsigned char cmd[2];
        unsigned char res[5];

        cmd[0] = CODSP_RD | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_SOP;
        cmd[1] = regno;

        codsp_send(duslic_id, cmd, 2, res, 5);

        return ((unsigned int)res[1] << 24) | ((unsigned int)res[2] << 16) | ((unsigned int)res[3] << 8) | res[4];
}

/****************************************************************************/

void codsp_write_cop_block(int duslic_id, int channel, unsigned char addr, const unsigned char *block)
{
        unsigned char cmd[10];

        cmd[0] = CODSP_WR | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_COP;
        cmd[1] = addr;
        memcpy(cmd + 2, block, 8);
        codsp_send(duslic_id, cmd, 10, 0, 0);
}

void codsp_write_cop_char(int duslic_id, int channel, unsigned char addr, unsigned char val)
{
        unsigned char cmd[3];

        cmd[0] = CODSP_WR | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_COP;
        cmd[1] = addr;
        cmd[2] = val;
        codsp_send(duslic_id, cmd, 3, 0, 0);
}

void codsp_write_cop_short(int duslic_id, int channel, unsigned char addr, unsigned short val)
{
        unsigned char cmd[3];

        cmd[0] = CODSP_WR | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_COP;
        cmd[1] = addr;
        cmd[2] = (unsigned char)(val >> 8);
        cmd[3] = (unsigned char)val;

        codsp_send(duslic_id, cmd, 4, 0, 0);
}

void codsp_read_cop_block(int duslic_id, int channel, unsigned char addr, unsigned char *block)
{
        unsigned char cmd[2];
        unsigned char res[9];

        cmd[0] = CODSP_RD | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_COP;
        cmd[1] = addr;
        codsp_send(duslic_id, cmd, 2, res, 9);
        memcpy(block, res + 1, 8);
}

unsigned char codsp_read_cop_char(int duslic_id, int channel, unsigned char addr)
{
        unsigned char cmd[2];
        unsigned char res[2];

        cmd[0] = CODSP_RD | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_COP;
        cmd[1] = addr;
        codsp_send(duslic_id, cmd, 2, res, 2);
        return res[1];
}

unsigned short codsp_read_cop_short(int duslic_id, int channel, unsigned char addr)
{
        unsigned char cmd[2];
        unsigned char res[3];

        cmd[0] = CODSP_RD | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_COP;
        cmd[1] = addr;

        codsp_send(duslic_id, cmd, 2, res, 3);

        return ((unsigned short)res[1] << 8) | res[2];
}

/****************************************************************************/

#define MAX_POP_BLOCK   50

void codsp_write_pop_block(int duslic_id, int channel, unsigned char addr, const unsigned char *block, int len)
{
        unsigned char cmd[2 + MAX_POP_BLOCK];

    if (len > MAX_POP_BLOCK) /* truncate */
            len = MAX_POP_BLOCK;

        cmd[0] = CODSP_WR | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_POP;
        cmd[1] = addr;
        memcpy(cmd + 2, block, len);
        codsp_send(duslic_id, cmd, 2 + len, 0, 0);
}

void codsp_write_pop_char(int duslic_id, int channel, unsigned char regno, unsigned char val)
{
        unsigned char cmd[3];

        cmd[0] = CODSP_WR | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_POP;
        cmd[1] = regno;
        cmd[2] = val;

        codsp_send(duslic_id, cmd, 3, 0, 0);
}

void codsp_write_pop_short(int duslic_id, int channel, unsigned char regno, unsigned short val)
{
        unsigned char cmd[4];

        cmd[0] = CODSP_WR | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_POP;
        cmd[1] = regno;
        cmd[2] = (unsigned char)(val >> 8);
        cmd[3] = (unsigned char)val;

        codsp_send(duslic_id, cmd, 4, 0, 0);
}

void codsp_write_pop_int(int duslic_id, int channel, unsigned char regno, unsigned int val)
{
        unsigned char cmd[5];

        cmd[0] = CODSP_WR | CODSP_ADR(channel) | CODSP_CMD_POP;
        cmd[1] = regno;
        cmd[2] = (unsigned char)(val >> 24);
        cmd[3] = (unsigned char)(val >> 16);
        cmd[4] = (unsigned char)(val >> 8);
        cmd[5] = (unsigned char)val;

        codsp_send(duslic_id, cmd, 6, 0, 0);
}

unsigned char codsp_read_pop_char(int duslic_id, int channel, unsigned char regno)
{
        unsigned char cmd[3];
        unsigned char res[2];

        cmd[0] = CODSP_RD | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_POP;
        cmd[1] = regno;

        codsp_send(duslic_id, cmd, 2, res, 2);

        return res[1];
}

unsigned short codsp_read_pop_short(int duslic_id, int channel, unsigned char regno)
{
        unsigned char cmd[2];
        unsigned char res[3];

        cmd[0] = CODSP_RD | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_POP;
        cmd[1] = regno;

        codsp_send(duslic_id, cmd, 2, res, 3);

        return ((unsigned short)res[1] << 8) | res[2];
}

unsigned int codsp_read_pop_int(int duslic_id, int channel, unsigned char regno)
{
        unsigned char cmd[2];
        unsigned char res[5];

        cmd[0] = CODSP_RD | CODSP_OP | CODSP_ADR(channel) | CODSP_CMD_POP;
        cmd[1] = regno;

        codsp_send(duslic_id, cmd, 2, res, 5);

        return ((unsigned int)res[1] << 24) | ((unsigned int)res[2] << 16) | ((unsigned int)res[3] << 8) | res[4];
}

/****************************************************************************/

struct _coeffs {
        unsigned char addr;
        unsigned char values[8];
};

struct _coeffs ac_coeffs[11] = {
        { 0x60, {0xAD,0xDA,0xB5,0x9B,0xC7,0x2A,0x9D,0x00} }, /* 0x60 IM-Filter part 1 */
        { 0x68, {0x10,0x00,0xA9,0x82,0x0D,0x77,0x0A,0x00} }, /* 0x68 IM-Filter part 2 */
        { 0x18, {0x08,0xC0,0xD2,0xAB,0xA5,0xE2,0xAB,0x07} }, /* 0x18 FRR-Filter       */
        { 0x28, {0x44,0x93,0xF5,0x92,0x88,0x00,0x00,0x00} }, /* 0x28 AR-Filter        */
        { 0x48, {0x96,0x38,0x29,0x96,0xC9,0x2B,0x8B,0x00} }, /* 0x48 LPR-Filter       */
        { 0x20, {0x08,0xB0,0xDA,0x9D,0xA7,0xFA,0x93,0x06} }, /* 0x20 FRX-Filter       */
        { 0x30, {0xBA,0xAC,0x00,0x01,0x85,0x50,0xC0,0x1A} }, /* 0x30 AX-Filter        */
        { 0x50, {0x96,0x38,0x29,0xF5,0xFA,0x2B,0x8B,0x00} }, /* 0x50 LPX-Filter       */
        { 0x00, {0x00,0x08,0x08,0x81,0x00,0x80,0x00,0x08} }, /* 0x00 TH-Filter part 1 */
        { 0x08, {0x81,0x00,0x80,0x00,0xD7,0x33,0xBA,0x01} }, /* 0x08 TH-Filter part 2 */
        { 0x10, {0xB3,0x6C,0xDC,0xA3,0xA4,0xE5,0x88,0x00} }  /* 0x10 TH-Filter part 3 */
};

struct _coeffs ac_coeffs_0dB[11] = {
        { 0x60, {0xAC,0x2A,0xB5,0x9A,0xB7,0x2A,0x9D,0x00} },
        { 0x68, {0x10,0x00,0xA9,0x82,0x0D,0x83,0x0A,0x00} },
        { 0x18, {0x08,0x20,0xD4,0xA4,0x65,0xEE,0x92,0x07} },
        { 0x28, {0x2B,0xAB,0x36,0xA5,0x88,0x00,0x00,0x00} },
        { 0x48, {0xAB,0xE9,0x4E,0x32,0xAB,0x25,0xA5,0x03} },
        { 0x20, {0x08,0x20,0xDB,0x9C,0xA7,0xFA,0xB4,0x07} },
        { 0x30, {0xF3,0x10,0x07,0x60,0x85,0x40,0xC0,0x1A} },
        { 0x50, {0x96,0x38,0x29,0x97,0x39,0x19,0x8B,0x00} },
        { 0x00, {0x00,0x08,0x08,0x81,0x00,0x80,0x00,0x08} },
        { 0x08, {0x81,0x00,0x80,0x00,0x47,0x3C,0xD2,0x01} },
        { 0x10, {0x62,0xDB,0x4A,0x87,0x73,0x28,0x88,0x00} }
};

struct _coeffs dc_coeffs[9] = {
        { 0x80, {0x25,0x59,0x9C,0x23,0x24,0x23,0x32,0x1C} }, /* 0x80 DC-Parameter     */
        { 0x70, {0x90,0x30,0x1B,0xC0,0x33,0x43,0xAC,0x02} }, /* 0x70 Ringing          */
        { 0x90, {0x3F,0xC3,0x2E,0x3A,0x80,0x90,0x00,0x09} }, /* 0x90 LP-Filters       */
        { 0x88, {0xAF,0x80,0x27,0x7B,0x01,0x4C,0x7B,0x02} }, /* 0x88 Hook Levels      */
        { 0x78, {0x00,0xC0,0x6D,0x7A,0xB3,0x78,0x89,0x00} }, /* 0x78 Ramp Generator   */
        { 0x58, {0xA5,0x44,0x34,0xDB,0x0E,0xA2,0x2A,0x00} }, /* 0x58 TTX              */
        { 0x38, {0x33,0x49,0x9A,0x65,0xBB,0x00,0x00,0x00} }, /* 0x38 TG1              */
        { 0x40, {0x33,0x49,0x9A,0x65,0xBB,0x00,0x00,0x00} }, /* 0x40 TG2              */
        { 0x98, {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00} }  /* 0x98 Reserved         */
};

void program_coeffs(int duslic_id, int channel, struct _coeffs *coeffs, int tab_size)
{
        int i;

        for (i = 0; i < tab_size; i++)
        codsp_write_cop_block(duslic_id, channel, coeffs[i].addr, coeffs[i].values);
}

#define SS_OPEN_CIRCUIT                 0
#define SS_RING_PAUSE                   1
#define SS_ACTIVE                       2
#define SS_ACTIVE_HIGH                  3
#define SS_ACTIVE_RING                  4
#define SS_RINGING                      5
#define SS_ACTIVE_WITH_METERING         6
#define SS_ONHOOKTRNSM                  7
#define SS_STANDBY                      8
#define SS_MAX                          8

static void codsp_set_slic(int duslic_id, int channel, int state)
{
        unsigned char v;

        v = codsp_read_sop_char(duslic_id, channel, BCR1_ADDR);

        switch (state) {

                case SS_ACTIVE:
                        codsp_write_sop_char(duslic_id, channel, BCR1_ADDR, (v & ~BCR1_ACTR) | BCR1_ACTL);
                        codsp_set_ciop_m(duslic_id, channel, CODSP_M_ANY_ACT);
                        break;

                case SS_ACTIVE_HIGH:
                        codsp_write_sop_char(duslic_id, channel, BCR1_ADDR, v & ~(BCR1_ACTR | BCR1_ACTL));
                        codsp_set_ciop_m(duslic_id, channel, CODSP_M_ANY_ACT);
                        break;

                case SS_ACTIVE_RING:
                case SS_ONHOOKTRNSM:
                        codsp_write_sop_char(duslic_id, channel, BCR1_ADDR, (v & ~BCR1_ACTL) | BCR1_ACTR);
                        codsp_set_ciop_m(duslic_id, channel, CODSP_M_ANY_ACT);
                        break;

                case SS_STANDBY:
                        codsp_write_sop_char(duslic_id, channel, BCR1_ADDR, v & ~(BCR1_ACTL | BCR1_ACTR));
                        codsp_set_ciop_m(duslic_id, channel, CODSP_M_SLEEP_PWRDN);
                        break;

                case SS_OPEN_CIRCUIT:
                        codsp_set_ciop_m(duslic_id, channel, CODSP_M_PWRDN_HIZ);
                        break;

                case SS_RINGING:
                        codsp_set_ciop_m(duslic_id, channel, CODSP_M_RING);
                        break;

                case SS_RING_PAUSE:
                        codsp_set_ciop_m(duslic_id, channel, CODSP_M_RING_PAUSE);
                        break;
        }
}

const unsigned char Ring_Sin_28Vrms_25Hz[8] = { 0x90, 0x30, 0x1B, 0xC0, 0xC3, 0x9C, 0x88, 0x00 };
const unsigned char Max_HookRingTh[3] = { 0x7B, 0x41, 0x62 };

void retrieve_slic_state(int slic_id)
{
        int duslic_id = slic_id >> 1;
        int channel = slic_id & 1;

        /* Retrieve the state of the SLICs */
        codsp_write_sop_char(duslic_id, channel, LMCR2_ADDR, 0x00);

        /* wait at least 1000us to clear the LM_OK and 500us to set the LM_OK ==> for the LM to make the first Measurement */
        udelay(10000);

        codsp_write_sop_char(duslic_id, channel, LMCR1_ADDR, LMCR1_LM_THM | LMCR1_LM_MASK);
        codsp_set_slic(duslic_id, channel, SS_ACTIVE_HIGH);
        codsp_write_sop_char(duslic_id, channel, LMCR3_ADDR, 0x40);

        /* Program Default Hook Ring thresholds */
        codsp_write_cop_block(duslic_id, channel, dc_coeffs[1].addr, dc_coeffs[1].values);

        /* Now program Hook Threshold while Ring and ac RingTrip to max values */
        codsp_write_cop_block(duslic_id, channel, dc_coeffs[3].addr, dc_coeffs[3].values);

        codsp_write_sop_short(duslic_id, channel, OFR1_ADDR, 0x0000);

        udelay(40000);
}

int wait_level_metering_finish(int duslic_id, int channel)
{
        int cnt;

        for (cnt = 0; cnt < 1000 &&
                (codsp_read_sop_char(duslic_id, channel, INTREG2_ADDR) & LM_OK_SRC_IRG_2) == 0; cnt++) { }

        return cnt != 1000;
}

int measure_on_hook_voltages(int slic_id, long *vdd,
                long *v_oh_H, long *v_oh_L, long *ring_mean_v, long *ring_rms_v)
{
        short LM_Result, Offset_Compensation;   /* Signed 16 bit */
        long int VDD, VDD_diff, V_in, V_out, Divider_Ratio, Vout_diff ;
        unsigned char err_mask = 0;
        int duslic_id = slic_id >> 1;
        int channel = slic_id & 1;
        int i;

        /* measure VDD */
        /* Now select the VDD level Measurement (but first of all Hold the DC characteristic) */
        codsp_write_sop_char(duslic_id, channel, TSTR5_ADDR, TSTR5_DC_HOLD);

        /* Activate Test Mode ==> To Enable DC Hold !!! */
        /* (else the LMRES is treated as Feeding Current and the Feeding voltage changes */
        /* imediatelly (after 500us when the LMRES Registers is updated for the first time after selection of (IO4-IO3) measurement !!!!))*/
        codsp_write_sop_char(duslic_id, channel, LMCR1_ADDR, LMCR1_TEST_EN | LMCR1_LM_THM | LMCR1_LM_MASK);

        udelay(40000);

        /* Now I Can select what to measure by DC Level Meter (select IO4-IO3) */
        codsp_write_sop_char(duslic_id, channel, LMCR2_ADDR, LMCR2_LM_SEL_VDD);

        /* wait at least 1000us to clear the LM_OK and 500us to set the LM_OK ==> for the LM to make the first Measurement */
        udelay(10000);

        /* Now Read the LM Result Registers */
        LM_Result = codsp_read_sop_short(duslic_id, channel, LMRES1_ADDR);
        VDD = (-1)*((((long int)LM_Result) * 390L ) >> 15) ;    /* VDDx100 */

        *vdd = VDD;

        VDD_diff = VDD - TARGET_VDDx100;

        if (VDD_diff < 0)
                VDD_diff = -VDD_diff;

        if (VDD_diff > VDD_MAX_DIFFx100)
                err_mask |= 1;

        Divider_Ratio = TARGET_V_DIVIDER_RATIO_x100;

        codsp_write_sop_char(duslic_id, channel, LMCR2_ADDR, 0x00);
        codsp_write_sop_char(duslic_id, channel, LMCR1_ADDR, LMCR1_LM_THM | LMCR1_LM_MASK);

        codsp_set_slic(duslic_id, channel, SS_ACTIVE_HIGH); /* Go back to ONHOOK Voltage */

        udelay(40000);

        codsp_write_sop_char(duslic_id, channel,
                LMCR1_ADDR, LMCR1_TEST_EN | LMCR1_LM_THM | LMCR1_LM_MASK);

        udelay(40000);

        /* Now I Can select what to measure by DC Level Meter (select IO4-IO3) */
        codsp_write_sop_char(duslic_id, channel, LMCR2_ADDR, LMCR2_LM_SEL_IO4_MINUS_IO3);

        /* wait at least 1000us to clear the LM_OK and 500us to set the LM_OK ==> for the LM to make the first Measurement */
        udelay(10000);

        /* Now Read the LM Result Registers */
        LM_Result = codsp_read_sop_short(duslic_id, channel, LMRES1_ADDR);
        V_in = (-1)* ((((long int)LM_Result) * V_AD_x10000 ) >> 15) ;  /* Vin x 10000*/

        V_out = (V_in * Divider_Ratio) / 10000L ;       /* Vout x100 */

        *v_oh_H = V_out;

        Vout_diff = V_out - TARGET_ONHOOK_BATH_x100;

        if (Vout_diff < 0)
                Vout_diff = -Vout_diff;

        if (Vout_diff > V_OUT_BATH_MAX_DIFFx100)
                err_mask |= 2;

        codsp_set_slic(duslic_id, channel, SS_ACTIVE); /* Go back to ONHOOK Voltage */

        udelay(40000);

        /* Now Read the LM Result Registers */
        LM_Result = codsp_read_sop_short(duslic_id, channel, LMRES1_ADDR);

        V_in = (-1)* ((((long int)LM_Result) * V_AD_x10000 ) >> 15) ;  /* Vin x 10000*/

        V_out = (V_in * Divider_Ratio) / 10000L ;       /* Vout x100 */

        *v_oh_L = V_out;

        Vout_diff = V_out - TARGET_ONHOOK_BATL_x100;

        if (Vout_diff < 0)
                Vout_diff = -Vout_diff;

        if (Vout_diff > V_OUT_BATL_MAX_DIFFx100)
                err_mask |= 4;

        /* perform ring tests */

        codsp_write_sop_char(duslic_id, channel, LMCR2_ADDR, 0x00);
        codsp_write_sop_char(duslic_id, channel, LMCR1_ADDR, LMCR1_LM_THM | LMCR1_LM_MASK);

        udelay(40000);

        codsp_write_sop_char(duslic_id, channel, LMCR3_ADDR, LMCR3_RTR_SEL | LMCR3_RNG_OFFSET_NONE);

        /* Now program RO1 =0V , Ring Amplitude and frequency and shift factor K = 1 (LMDC=0x0088)*/
        codsp_write_cop_block(duslic_id, channel, RING_PARAMS_START_ADDR, Ring_Sin_28Vrms_25Hz);

        /* By Default RO1 is selected when ringing RNG-OFFSET = 00 */

        /* Now program Hook Threshold while Ring and ac RingTrip to max values */
        for(i = 0; i < sizeof(Max_HookRingTh); i++)
                codsp_write_cop_char(duslic_id, channel, HOOK_THRESH_RING_START_ADDR + i, Max_HookRingTh[i]);

        codsp_write_sop_short(duslic_id, channel, OFR1_ADDR, 0x0000);

        codsp_set_slic(duslic_id, channel, SS_RING_PAUSE); /* Start Ringing */

        /* select source for the levelmeter to be IO4-IO3 */
        codsp_write_sop_char(duslic_id, channel, LMCR2_ADDR, LMCR2_LM_SEL_IO4_MINUS_IO3);

        udelay(40000);

        /* Before Enabling Level Meter Programm the apropriate shift factor K_INTDC=(4 if Rectifier Enabled and 2 if Rectifier Disabled) */
        codsp_write_cop_char(duslic_id, channel, RING_PARAMS_START_ADDR + 7, K_INTDC_RECT_OFF);

        udelay(10000);

        /* Enable LevelMeter to Integrate only once (Rectifier Disabled) */
        codsp_write_sop_char(duslic_id, channel,
                        LMCR1_ADDR, LMCR1_LM_THM | LMCR1_LM_MASK | LMCR1_LM_EN | LMCR1_LM_ONCE);

        udelay(40000); /* Integration Period == Ring Period = 40ms (for 25Hz Ring) */

        if (wait_level_metering_finish(duslic_id, channel)) {

                udelay(10000); /* To be sure that Integration Results are Valid wait at least 500us !!! */

                /* Now Read the LM Result Registers (Will be valid until LM_EN becomes zero again( after that the Result is updated every 500us) ) */
                Offset_Compensation = codsp_read_sop_short(duslic_id, channel, LMRES1_ADDR);
                Offset_Compensation = (-1) * ((Offset_Compensation * (1 << K_INTDC_RECT_OFF)) / N_SAMPLES);

                /* Disable LevelMeter ==> In order to be able to restart Integrator again (for the next integration) */
                codsp_write_sop_char(duslic_id, channel, LMCR1_ADDR, LMCR1_LM_THM | LMCR1_LM_MASK | LMCR1_LM_ONCE);

                /* Now programm Integrator Offset Registers !!! */
                codsp_write_sop_short(duslic_id, channel, OFR1_ADDR, Offset_Compensation);

                codsp_set_slic(duslic_id, channel, SS_RINGING); /* Start Ringing */

                udelay(40000);

                /* Reenable Level Meter Integrator (The Result will be valid after Integration Period=Ring Period and until LN_EN become zero again) */
                codsp_write_sop_char(duslic_id, channel,
                                LMCR1_ADDR, LMCR1_LM_THM | LMCR1_LM_MASK | LMCR1_LM_EN | LMCR1_LM_ONCE);

                udelay(40000); /* Integration Period == Ring Period = 40ms (for 25Hz Ring) */

                /* Poll the LM_OK bit to see when Integration Result is Ready */
                if (wait_level_metering_finish(duslic_id, channel)) {

                        udelay(10000); /* wait at least 500us to be sure that the Integration Result are valid !!! */

                        /* Now Read the LM Result Registers (They will hold their value until LM_EN become zero again */
                        /*                                  ==>After that Result Regs will be updated every 500us !!!) */
                        LM_Result = codsp_read_sop_short(duslic_id, channel, LMRES1_ADDR);
                        V_in = (-1) * ( ( (((long int)LM_Result) * V_AD_x10000) / N_SAMPLES) >> (15 - K_INTDC_RECT_OFF)) ;  /* Vin x 10000*/

                        V_out = (V_in * Divider_Ratio) / 10000L ;       /* Vout x100 */

                        if (V_out < 0)
                                V_out= -V_out;

                        if (V_out > MAX_V_RING_MEANx100)
                                err_mask |= 8;

                        *ring_mean_v = V_out;
                } else {
                        err_mask |= 8;
                        *ring_mean_v = 0;
                }
        } else {
                err_mask |= 8;
                *ring_mean_v = 0;
        }

        /* Disable LevelMeter ==> In order to be able to restart Integrator again (for the next integration) */
        codsp_write_sop_char(duslic_id, channel, LMCR1_ADDR,
                LMCR1_LM_THM | LMCR1_LM_MASK | LMCR1_LM_ONCE);
        codsp_write_sop_short(duslic_id, channel, OFR1_ADDR, 0x0000);

        codsp_set_slic(duslic_id, channel, SS_RING_PAUSE); /* Start Ringing */

        /* Now Enable Rectifier */
        /* select source for the levelmeter to be IO4-IO3 */
        codsp_write_sop_char(duslic_id, channel, LMCR2_ADDR,
                LMCR2_LM_SEL_IO4_MINUS_IO3 | LMCR2_LM_RECT);

        /* Program the apropriate shift factor K_INTDC (in order to avoid Overflow at Integtation Result !!!) */
        codsp_write_cop_char(duslic_id, channel, RING_PARAMS_START_ADDR + 7, K_INTDC_RECT_ON);

        udelay(40000);

        /* Reenable Level Meter Integrator (The Result will be valid after Integration Period=Ring Period and until LN_EN become zero again) */
        codsp_write_sop_char(duslic_id, channel, LMCR1_ADDR,
                        LMCR1_LM_THM | LMCR1_LM_MASK | LMCR1_LM_EN | LMCR1_LM_ONCE);

        udelay(40000);

        /* Poll the LM_OK bit to see when Integration Result is Ready */
        if (wait_level_metering_finish(duslic_id, channel)) {

                udelay(10000);

                /* Now Read the LM Result Registers (They will hold their value until LM_EN become zero again */
                /*                                  ==>After that Result Regs will be updated every 500us !!!) */
                Offset_Compensation = codsp_read_sop_short(duslic_id, channel, LMRES1_ADDR);
                Offset_Compensation = (-1) * ((Offset_Compensation * (1 << K_INTDC_RECT_ON)) / N_SAMPLES);

                /* Disable LevelMeter ==> In order to be able to restart Integrator again (for the next integration) */
                codsp_write_sop_char(duslic_id, channel, LMCR1_ADDR, LMCR1_LM_THM | LMCR1_LM_MASK | LMCR1_LM_ONCE);

                /* Now programm Integrator Offset Registers !!! */
                codsp_write_sop_short(duslic_id, channel, OFR1_ADDR, Offset_Compensation);

                /* Be sure that a Ring is generated !!!! */
                codsp_set_slic(duslic_id, channel, SS_RINGING); /* Start Ringing again */

                udelay(40000);

                /* Reenable Level Meter Integrator (The Result will be valid after Integration Period=Ring Period and until LN_EN become zero again) */
                codsp_write_sop_char(duslic_id, channel, LMCR1_ADDR,
                                LMCR1_LM_THM | LMCR1_LM_MASK | LMCR1_LM_EN | LMCR1_LM_ONCE);

                udelay(40000);

                /* Poll the LM_OK bit to see when Integration Result is Ready */
                if (wait_level_metering_finish(duslic_id, channel)) {

                        udelay(10000);

                        /* Now Read the LM Result Registers (They will hold their value until LM_EN become zero again */
                        /*                                  ==>After that Result Regs will be updated every 500us !!!) */
                        LM_Result = codsp_read_sop_short(duslic_id, channel, LMRES1_ADDR);
                        V_in = (-1) *  ( ( (((long int)LM_Result) * V_AD_x10000) / N_SAMPLES) >> (15 - K_INTDC_RECT_ON) ) ;  /* Vin x 10000*/

                        V_out = (((V_in * Divider_Ratio) / 10000L) * RMS_MULTIPLIERx100) / 100 ;        /* Vout_RMS x100 */
                        if (V_out < 0)
                                V_out = -V_out;

                        Vout_diff = (V_out - TARGET_V_RING_RMSx100);

                        if (Vout_diff < 0)
                                Vout_diff = -Vout_diff;

                        if (Vout_diff > V_RMS_RING_MAX_DIFFx100)
                                err_mask |= 16;

                        *ring_rms_v = V_out;
                } else {
                        err_mask |= 16;
                        *ring_rms_v = 0;
                }
        } else {
                err_mask |= 16;
                *ring_rms_v = 0;
        }
        /* Disable LevelMeter ==> In order to be able to restart Integrator again (for the next integration) */
        codsp_write_sop_char(duslic_id, channel, LMCR1_ADDR, LMCR1_LM_THM | LMCR1_LM_MASK);

        retrieve_slic_state(slic_id);

        return(err_mask);
}

int test_dtmf(int slic_id)
{
        unsigned char code;
        unsigned char b;
        unsigned int intreg;
        int duslic_id = slic_id >> 1;
        int channel = slic_id & 1;

        for (code = 0; code < 16; code++) {
                b = codsp_read_sop_char(duslic_id, channel, DSCR_ADDR);
                codsp_write_sop_char(duslic_id, channel, DSCR_ADDR,
                        (b & ~(DSCR_PTG | DSCR_DG_KEY(15))) | DSCR_DG_KEY(code) | DSCR_TG1_EN | DSCR_TG2_EN);
                udelay(80000);

                intreg = codsp_read_sop_int(duslic_id, channel, INTREG1_ADDR);
                if ((intreg & CODSP_INTREG_INT_CH) == 0)
                        break;

                if ((intreg & CODSP_INTREG_DTMF_OK) == 0 ||
                                codsp_dtmf_map[(intreg >> 10) & 15] != codsp_dtmf_map[code])
                        break;

                b = codsp_read_sop_char(duslic_id, channel, DSCR_ADDR);
                codsp_write_sop_char(duslic_id, channel, DSCR_ADDR,
                                b & ~(DSCR_COR8 | DSCR_TG1_EN | DSCR_TG2_EN));

                udelay(80000);

                intreg = codsp_read_sop_int(duslic_id, channel, INTREG1_ADDR); /* for dtmf_pause irq */
        }

        if (code != 16) {
                b = codsp_read_sop_char(duslic_id, channel, DSCR_ADDR); /* stop dtmf */
                codsp_write_sop_char(duslic_id, channel, DSCR_ADDR,
                                b & ~(DSCR_COR8 | DSCR_TG1_EN | DSCR_TG2_EN));
                return(1);
        }

        return(0);
}

void data_up_persist_time(int duslic_id, int channel, int time_ms)
{
        unsigned char b;

        b = codsp_read_sop_char(duslic_id, channel, IOCTL3_ADDR);
        b = (b & 0x0F) | ((time_ms & 0x0F) << 4);
        codsp_write_sop_char(duslic_id, channel, IOCTL3_ADDR, b);
}

static void program_dtmf_params(int duslic_id, int channel)
{
        unsigned char b;

        codsp_write_pop_char(duslic_id, channel, DTMF_LEV_ADDR, 0x10);
        codsp_write_pop_char(duslic_id, channel, DTMF_TWI_ADDR, 0x0C);
        codsp_write_pop_char(duslic_id, channel, DTMF_NCF_H_ADDR, 0x79);
        codsp_write_pop_char(duslic_id, channel, DTMF_NCF_L_ADDR, 0x10);
        codsp_write_pop_char(duslic_id, channel, DTMF_NBW_H_ADDR, 0x02);
        codsp_write_pop_char(duslic_id, channel, DTMF_NBW_L_ADDR, 0xFB);
        codsp_write_pop_char(duslic_id, channel, DTMF_GAIN_ADDR, 0x91);
        codsp_write_pop_char(duslic_id, channel, DTMF_RES1_ADDR, 0x00);
        codsp_write_pop_char(duslic_id, channel, DTMF_RES2_ADDR, 0x00);
        codsp_write_pop_char(duslic_id, channel, DTMF_RES3_ADDR, 0x00);

        b = codsp_read_sop_char(duslic_id, channel, BCR5_ADDR);
        codsp_write_sop_char(duslic_id, channel, BCR5_ADDR, b | BCR5_DTMF_EN);
}

static void codsp_channel_full_reset(int duslic_id, int channel)
{

        program_coeffs(duslic_id, channel, ac_coeffs, sizeof(ac_coeffs) / sizeof(struct _coeffs));
        program_coeffs(duslic_id, channel, dc_coeffs, sizeof(dc_coeffs) / sizeof(struct _coeffs));

        /* program basic configuration registers */
        codsp_write_sop_char(duslic_id, channel, BCR1_ADDR, 0x01);
        codsp_write_sop_char(duslic_id, channel, BCR2_ADDR, 0x41);
        codsp_write_sop_char(duslic_id, channel, BCR3_ADDR, 0x43);
        codsp_write_sop_char(duslic_id, channel, BCR4_ADDR, 0x00);
        codsp_write_sop_char(duslic_id, channel, BCR5_ADDR, 0x00);

        codsp_write_sop_char(duslic_id, channel, DSCR_ADDR, 0x04);              /* PG */

        program_dtmf_params(duslic_id, channel);

        codsp_write_sop_char(duslic_id, channel, LMCR3_ADDR, 0x40);     /* RingTRip_SEL */

        data_up_persist_time(duslic_id, channel, 4);

        codsp_write_sop_char(duslic_id, channel, MASK_ADDR, 0xFF);     /* All interrupts masked */

        codsp_set_slic(duslic_id, channel, SS_ACTIVE_HIGH);
}

static int codsp_chip_full_reset(int duslic_id)
{
        int i, cnt;
        int intreg[NUM_CHANNELS];
        unsigned char pcm_resync;
        unsigned char revision;

        codsp_reset_chip(duslic_id);

        udelay(2000);

        for (i = 0; i < NUM_CHANNELS; i++)
                intreg[i] = codsp_read_sop_int(duslic_id, i, INTREG1_ADDR);

        udelay(1500);

        if (_PORTC_GET(com_hook_mask_tab[duslic_id]) == 0) {
                printf("_HOOK(%d) stayed low\n", duslic_id);
                return -1;
        }

        for (pcm_resync = 0, i = 0; i < NUM_CHANNELS; i++) {
                if (intreg[i] & CODSP_INTREG_SYNC_FAIL)
                        pcm_resync |= 1 << i;
        }

        for (cnt = 0; cnt < 5 && pcm_resync; cnt++) {
                for (i = 0; i < NUM_CHANNELS; i++)
                        codsp_resync_channel(duslic_id, i);

                udelay(2000);

                pcm_resync = 0;

                for (i = 0; i < NUM_CHANNELS; i++) {
                        if (codsp_read_sop_int(duslic_id, i, INTREG1_ADDR) & CODSP_INTREG_SYNC_FAIL)
                                pcm_resync |= 1 << i;
                }
        }

        if (cnt == 5) {
                printf("PCM_Resync(%u) not completed\n", duslic_id);
                return -2;
        }

        revision = codsp_read_sop_char(duslic_id, 0, REVISION_ADDR);
        printf("DuSLIC#%d hardware version %d.%d\r\n", duslic_id, (revision & 0xF0) >> 4, revision & 0x0F);

        codsp_write_sop_char(duslic_id, 0, XCR_ADDR, 0x80);     /* EDSP_EN */

        for (i = 0; i < NUM_CHANNELS; i++) {
                codsp_write_sop_char(duslic_id, i, PCMC1_ADDR, 0x01);
                codsp_channel_full_reset(duslic_id, i);
        }

        return 0;
}

int slic_self_test(int duslic_mask)
{
        int slic;
        int i;
        int r;
        long vdd, v_oh_H, v_oh_L, ring_mean_v, ring_rms_v;
        const char *err_txt[] = { "VDD", "V_OH_H", "V_OH_L", "V_RING_MEAN", "V_RING_RMS" };
        int error = 0;

        for (slic = 0; slic < MAX_SLICS; slic++) { /* voltages self test */
                if (duslic_mask & (1 << (slic >> 1))) {
                        r = measure_on_hook_voltages(slic, &vdd,
                                &v_oh_H, &v_oh_L, &ring_mean_v, &ring_rms_v);

                        printf("SLIC %u measured voltages (x100):\n\t"
                                    "VDD = %ld\tV_OH_H = %ld\tV_OH_L = %ld\tV_RING_MEAN = %ld\tV_RING_RMS = %ld\n",
                                    slic, vdd, v_oh_H, v_oh_L, ring_mean_v, ring_rms_v);

                        if (r != 0)
                                error |= 1 << slic;

                        for (i = 0; i < 5; i++)
                                if (r & (1 << i))
                                        printf("\t%s out of range\n", err_txt[i]);
                }
        }

        for (slic = 0; slic < MAX_SLICS; slic++) { /* voice path self test */
                if (duslic_mask & (1 << (slic >> 1))) {
                        printf("SLIC %u VOICE PATH...CHECKING", slic);
                        printf("\rSLIC %u VOICE PATH...%s\n", slic,
                                (r = test_dtmf(slic)) != 0 ? "FAILED  " : "PASSED  ");

                        if (r != 0)
                                error |= 1 << slic;
                }
        }

        return(error);
}

#if defined(CONFIG_NETTA_ISDN)

#define SPIENS1         (1 << (31 - 15))
#define SPIENS2         (1 << (31 - 19))

static const int spiens_mask_tab[2] = { SPIENS1, SPIENS2 };
int s_initialized = 0;

static inline unsigned int s_transfer_internal(int s_id, unsigned int address, unsigned int value)
{
        unsigned int rx, v;

        _PORTB_SET(spiens_mask_tab[s_id], 0);

        rx = __SPI_Transfer(address);

        switch (address & 0xF0) {
        case 0x60:      /* write byte register */
        case 0x70:
                rx = __SPI_Transfer(value);
                break;

        case 0xE0:      /* read R6 register */
                v = __SPI_Transfer(0);

                rx = (rx << 8) | v;

                break;

        case 0xF0:      /* read byte register */
                rx = __SPI_Transfer(0);

                break;
        }

        _PORTB_SET(spiens_mask_tab[s_id], 1);

        return rx;
}

static void s_write_BR(int s_id, unsigned int regno, unsigned int val)
{
        unsigned int address;
        unsigned int v;

        address = 0x70 | (regno & 15);
        val &= 0xff;

        v = s_transfer_internal(s_id, address, val);
}

static void s_write_OR(int s_id, unsigned int regno, unsigned int val)
{
        unsigned int address;
        unsigned int v;

        address = 0x70 | (regno & 15);
        val &= 0xff;

        v = s_transfer_internal(s_id, address, val);
}

static void s_write_NR(int s_id, unsigned int regno, unsigned int val)
{
        unsigned int address;
        unsigned int v;

        address = (regno & 7) << 4;
        val &= 0xf;

        v = s_transfer_internal(s_id, address | val, 0x00);
}

#define BR7_IFR                 0x08    /* IDL2 free run */
#define BR7_ICSLSB              0x04    /* IDL2 clock speed LSB */

#define BR15_OVRL_REG_EN        0x80
#define OR7_D3VR                0x80    /* disable 3V regulator */

#define OR8_TEME                0x10    /* TE mode enable */
#define OR8_MME                 0x08    /* master mode enable */

void s_initialize(void)
{
        int s_id;

        for (s_id = 0; s_id < 2; s_id++) {
                s_write_BR(s_id, 7, BR7_IFR | BR7_ICSLSB);
                s_write_BR(s_id, 15, BR15_OVRL_REG_EN);
                s_write_OR(s_id, 8, OR8_TEME | OR8_MME);
                s_write_OR(s_id, 7, OR7_D3VR);
                s_write_OR(s_id, 6, 0);
                s_write_BR(s_id, 15, 0);
                s_write_NR(s_id, 3, 0);
        }
}

#endif

int board_post_codec(int flags)
{
        int j;
        int r;
        int duslic_mask;

        printf("board_post_dsp\n");

#if defined(CONFIG_NETTA_ISDN)
        if (s_initialized == 0) {
                s_initialize();
                s_initialized = 1;

                printf("s_initialized\n");

                udelay(20000);
        }
#endif
        duslic_mask = 0;

        for (j = 0; j < MAX_DUSLIC; j++) {
                if (codsp_chip_full_reset(j) < 0)
                        printf("Error initializing DuSLIC#%d\n", j);
                else
                        duslic_mask |= 1 << j;
        }

        if (duslic_mask != 0) {
                printf("Testing SLICs...\n");

                r = slic_self_test(duslic_mask);
                for (j = 0; j < MAX_SLICS; j++) {
                        if (duslic_mask & (1 << (j >> 1)))
                                printf("SLIC %u...%s\n", j, r & (1 << j) ? "FAULTY" : "OK");
                }
        }
        printf("DuSLIC self test finished\n");

        return 0;       /* return -1 on error */
}