| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Gigabeat S specific code for the WM8978 codec |
| * |
| * Copyright (C) 2008 Michael Sevakis |
| * |
| * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| ****************************************************************************/ |
| #include "config.h" |
| #include "system.h" |
| #include "kernel.h" |
| #include "sound.h" |
| #include "i2c-imx31.h" |
| |
| /* NOTE: Some port-specific bits will have to be moved away (node and GPIO |
| * writes) for cleanest implementation. */ |
| |
| static struct i2c_node wm8978_i2c_node = |
| { |
| .num = I2C1_NUM, |
| .ifdr = I2C_IFDR_DIV192, /* 66MHz/.4MHz = 165, closest = 192 = 343750Hz */ |
| /* Just hard-code for now - scaling may require |
| * updating */ |
| .addr = WMC_I2C_ADDR, |
| }; |
| |
| void audiohw_init(void) |
| { |
| /* USB PLL = 338.688MHz, /30 = 11.2896MHz = 256Fs */ |
| imx31_regmod32(&CLKCTL_PDR1, |
| PDR1_SSI1_PODFw(64-1) | PDR1_SSI2_PODFw(5-1), |
| PDR1_SSI1_PODF | PDR1_SSI2_PODF); |
| imx31_regmod32(&CLKCTL_PDR1, |
| PDR1_SSI1_PRE_PODFw(4-1) | PDR1_SSI2_PRE_PODFw(1-1), |
| PDR1_SSI1_PRE_PODF | PDR1_SSI2_PRE_PODF); |
| i2c_enable_node(&wm8978_i2c_node, true); |
| |
| audiohw_preinit(); |
| |
| GPIO3_DR |= (1 << 21); /* Turn on analogue LDO */ |
| } |
| |
| void audiohw_enable_headphone_jack(bool enable) |
| { |
| if (enable) |
| { |
| GPIO3_DR |= (1 << 22); /* Turn on headphone jack output */ |
| } |
| else |
| { |
| GPIO3_DR &= ~(1 << 22); /* Turn off headphone jack output */ |
| } |
| } |
| |
| void wmcodec_write(int reg, int data) |
| { |
| unsigned char d[2]; |
| /* |aaaaaaad|dddddddd| */ |
| d[0] = (reg << 1) | ((data & 0x100) >> 8); |
| d[1] = data; |
| i2c_write(&wm8978_i2c_node, d, 2); |
| } |