| Pedro just send me this routine: static int I2S_setup(){<= br>int i; // u32 val32; // CDM &nbs= p; struct mpc52xx_cdm __iomem *cdm; // // /* GPIO= Modification */ struct mpc52xx_gpio __iomem *gpio; // /* END GPIO Modification */ // &nb= sp; cdm =3D ioremap(MPC52xx_PA(MPC52xx_CDM_OFFSET), MPC52xx_CDM_SIZE)= ; gpio =3D ioremap(MPC52xx_PA(MPC52xx_GPIO_OFFSET), M= PC52xx_GPIO_SIZE); // switch(psc_num) { = case 1: &= nbsp; initiator_tx =3D SDMA_INITIATOR_PSC1_TX; = initiator_rx =3D SDMA_IN= ITIATOR_PSC1_RX; = ; break; case 2: &nb= sp; initiator_tx =3D SDMA_INITIATOR_P= SC2_TX; initiat= or_rx =3D SDMA_INITIATOR_PSC2_RX; = break; default:= panic("snd-I2S= mgt.o: invalid value for psc_num (%i)\n",psc_num); &n= bsp; break; }; = /* 528MHz/(0x1f+1)=3D16.5 MHz */ c= dm->mclken_div_psc2 =3D 0x8001; // Mhz MCLK ( Khz * ) &nb= sp; psc->command =3D (MPC52xx_PSC_TX_DISABLE | MPC52xx_PSC_RX_DISABLE);<= br> /* PSC2 CODEC with Master Clock */ &nb= sp; gpio->port_config |=3D 0x70; /* PSC2 clock ena= ble */ cdm->clk_enables |=3D 0x40; = ; // PSC reset psc->command =3D MPC52xx_PSC_= RST_RX; psc->command =3D MPC52xx_PSC_RST_TX; &n= bsp; psc->command =3D MPC52xx_PSC_SEL_MODE_REG_1; &= nbsp; psc->command =3D MPC52xx_PSC_RST_ERR_STAT; // PSC setup I2S psc->mod= e =3D 0; psc->rfalarm =3D RX_ALARM; = ; psc->tfalarm =3D TX_ALARM; psc->r= fcntl =3D RX_GRAN; psc->tfcntl =3D TX_GRAN;<= br> psc->mpc52xx_psc_imr =3D 0x0000; &nbs= p; psc->sicr =3D 0x0FE00000; psc->ctur = =3D 0x1f; //Frame length 0x17 psc->ccr =3D 0x3= f5D; //LRCK KHz, BitCLK MHz 0x3f05! // = ; psc->sicr |=3D /* DELAY_TIME_SLOT |*/ MULTIWD_ENABLE | CLK_POL_RISING; // = // psc->sicr |=3D GEN_CLK_INT; &nbs= p; psc->command =3D MPC52xx_PSC_RST_RX; = ; psc->command =3D MPC52xx_PSC_RST_TX; psc->com= mand =3D MPC52xx_PSC_SEL_MODE_REG_1; psc->command = =3D MPC52xx_PSC_RST_ERR_STAT; // // // setup the = sdma tasks tx_sdma =3D sdma_alloc(PERIODS_HW+1); &= nbsp; rx_sdma =3D sdma_alloc(PERIODS_HW+1); = if (!tx_sdma || !rx_sdma) { = printk("sdma_alloc failed\n"); re= turn -ENOMEM; } // asimmini /= / sdma_gen_bd_rx_init(rx_sdma, (phys_addr_t)&(psc-&g= t;rfdata), PERIODSIZE_HW, initiator_rx, 6); sdma_gen_bd_rx_init(0, rx_sdma, (phys_addr_t)&(psc->rfdata), initia= tor_rx, 6,PERIODSIZE_HW); // sdma_gen_bd_tx_init(tx_s= dma, (phys_addr_t)&(psc->tfdata), PERIODSIZE_HW, initiator_tx, 6); printk("txtask is= %d rxtask is %d\n", tx_sdma->tasknum, rx_sdma->tasknum); // &= nbsp; // prepare the ring buffers ASIMMINI // = ; tasknum %d\n", sdma_irq(rx_sdma), MPC52xx_SDMA_IRQ_BASE + rx_sdma->tas= knum); if (request_irq(sdma_irq(rx_sdma), I2S_rx_irq,= 0, "SPI rx dma", NULL)){ printk(K= ERN_ERR "SPI: SDMA rx irq allocation failed\n"); &nbs= p; return -EINVAL; } else prin= tk("SPI: SDA rx irq allocation succeded\n"); if (requ= est_irq(sdma_irq(tx_sdma), I2S_tx_irq, 0, "SPI tx dma", NULL)){ &n= bsp; printk(KERN_ERR "SPI: SDMA tx irq allocation = failed\n"); return -EINVAL; &nb= sp; } else &= nbsp; printk("SPI: SDA tx irq allocation succeded\n"); = ; // // // clear any pending interrupts sdma_cle= ar_irq(rx_sdma); // printk("Before activating the= tasks\n"); // // activate the tasks // &nbs= p; sdma_enable(tx_sdma); // sdma_enable(rx_sdma= ); // // printk("about to enable SPI psc\n"); udelay(100); // // = ; // enable transmitter and receiver psc->command = =3D MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE; // // &nbs= p; psc->command =3D MPC52xx_PSC_TX_ENABLE; // // // // = I2S_print(__FUNCTION__); // // // pc= m1680_read(); // // pcm1= 680_configure(44100); // // pcm1680_read(); = return 0; } But i have some problems. i don't= have any of thiese functions: sdma_alloc rx_sdma sdma_gen_bd_= rx_init sdma_gen_bd_tx_init sdma_irq sdma_clear_irq and som= e define: I2S_rx_irq I2S_tx_irq |