/* * File: sound/soc/blackfin/bf5xx-ad73311.c * Author: Cliff Cai * * Created: Thur Sep 25 2008 * Description: Board driver for ad73311 sound chip * * Modified: * Copyright 2008 Analog Devices Inc. * * Bugs: Enter bugs at http://blackfin.uclinux.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; if not, see the file COPYING, or write * to the Free Software Foundation, Inc., * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "../codecs/ad73311.h" #include "bf5xx-sport.h" #if CONFIG_SND_BF5XX_SPORT_NUM == 0 #define bfin_write_SPORT_TCR1 bfin_write_SPORT0_TCR1 #define bfin_read_SPORT_TCR1 bfin_read_SPORT0_TCR1 #define bfin_write_SPORT_TCR2 bfin_write_SPORT0_TCR2 #define bfin_write_SPORT_TX16 bfin_write_SPORT0_TX16 #define bfin_read_SPORT_STAT bfin_read_SPORT0_STAT #else #define bfin_write_SPORT_TCR1 bfin_write_SPORT1_TCR1 #define bfin_read_SPORT_TCR1 bfin_read_SPORT1_TCR1 #define bfin_write_SPORT_TCR2 bfin_write_SPORT1_TCR2 #define bfin_write_SPORT_TX16 bfin_write_SPORT1_TX16 #define bfin_read_SPORT_STAT bfin_read_SPORT1_STAT #endif #define GPIO_SE CONFIG_SND_BFIN_AD73311_SE static struct snd_soc_card bf5xx_ad73311; static int snd_ad73311_startup(void) { pr_debug("%s enter\n", __func__); /* Pull up SE pin on AD73311L */ gpio_set_value(GPIO_SE, 1); return 0; } static int snd_ad73311_configure(void) { unsigned short ctrl_regs[6]; unsigned short status = 0; int count = 0; /* DMCLK = MCLK = 16.384 MHz * SCLK = DMCLK/8 = 2.048 MHz * Sample Rate = DMCLK/2048 = 8 KHz */ ctrl_regs[0] = AD_CONTROL | AD_WRITE | CTRL_REG_B | REGB_MCDIV(0) | \ REGB_SCDIV(0) | REGB_DIRATE(0); ctrl_regs[1] = AD_CONTROL | AD_WRITE | CTRL_REG_C | REGC_PUDEV | \ REGC_PUADC | REGC_PUDAC | REGC_PUREF | REGC_REFUSE ; ctrl_regs[2] = AD_CONTROL | AD_WRITE | CTRL_REG_D | REGD_OGS(2) | \ REGD_IGS(2); ctrl_regs[3] = AD_CONTROL | AD_WRITE | CTRL_REG_E | REGE_DA(0x1f); ctrl_regs[4] = AD_CONTROL | AD_WRITE | CTRL_REG_F | REGF_SEEN ; ctrl_regs[5] = AD_CONTROL | AD_WRITE | CTRL_REG_A | REGA_MODE_DATA; local_irq_disable(); snd_ad73311_startup(); udelay(1); bfin_write_SPORT_TCR1(TFSR); bfin_write_SPORT_TCR2(0xF); SSYNC(); /* SPORT Tx Register is a 8 x 16 FIFO, all the data can be put to * FIFO before enable SPORT to transfer the data */ for (count = 0; count < 6; count++) bfin_write_SPORT_TX16(ctrl_regs[count]); SSYNC(); bfin_write_SPORT_TCR1(bfin_read_SPORT_TCR1() | TSPEN); SSYNC(); /* When TUVF is set, the data is already send out */ while (!(status & TUVF) && ++count < 10000) { udelay(1); status = bfin_read_SPORT_STAT(); SSYNC(); } bfin_write_SPORT_TCR1(bfin_read_SPORT_TCR1() & ~TSPEN); SSYNC(); local_irq_enable(); if (count >= 10000) { printk(KERN_ERR "ad73311: failed to configure codec\n"); return -1; } return 0; } static int bf5xx_probe(struct snd_soc_card *card) { int err; if (gpio_request(GPIO_SE, "AD73311_SE")) { printk(KERN_ERR "%s: Failed ro request GPIO_%d\n", __func__, GPIO_SE); return -EBUSY; } gpio_direction_output(GPIO_SE, 0); err = snd_ad73311_configure(); if (err < 0) return -EFAULT; return 0; } #define BF5XX_AD7311_DAI_FMT (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF | \ SND_SOC_DAIFMT_CBM_CFM) static struct snd_soc_dai_link bf5xx_ad73311_dai[] = { { .name = "ad73311", .stream_name = "AD73311", .cpu_dai_name = "bfin-i2s.0", .codec_dai_name = "ad73311-hifi", .platform_name = "bfin-i2s-pcm-audio", .codec_name = "ad73311", .dai_fmt = BF5XX_AD7311_DAI_FMT, }, { .name = "ad73311", .stream_name = "AD73311", .cpu_dai_name = "bfin-i2s.1", .codec_dai_name = "ad73311-hifi", .platform_name = "bfin-i2s-pcm-audio", .codec_name = "ad73311", .dai_fmt = BF5XX_AD7311_DAI_FMT, }, }; static struct snd_soc_card bf5xx_ad73311 = { .name = "bfin-ad73311", .owner = THIS_MODULE, .probe = bf5xx_probe, .dai_link = &bf5xx_ad73311_dai[CONFIG_SND_BF5XX_SPORT_NUM], .num_links = 1, }; static struct platform_device *bf5xx_ad73311_snd_device; static int __init bf5xx_ad73311_init(void) { int ret; pr_debug("%s enter\n", __func__); bf5xx_ad73311_snd_device = platform_device_alloc("soc-audio", -1); if (!bf5xx_ad73311_snd_device) return -ENOMEM; platform_set_drvdata(bf5xx_ad73311_snd_device, &bf5xx_ad73311); ret = platform_device_add(bf5xx_ad73311_snd_device); if (ret) platform_device_put(bf5xx_ad73311_snd_device); return ret; } static void __exit bf5xx_ad73311_exit(void) { pr_debug("%s enter\n", __func__); platform_device_unregister(bf5xx_ad73311_snd_device); } module_init(bf5xx_ad73311_init); module_exit(bf5xx_ad73311_exit); /* Module information */ MODULE_AUTHOR("Cliff Cai"); MODULE_DESCRIPTION("ALSA SoC AD73311 Blackfin"); MODULE_LICENSE("GPL"); stuff with auto-negotation that I am still trying to understand. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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