/* * 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"); td> tree370efda701f03cccf21e02bb1fdd3b852547d75c /sound/soc/codecs/pcm512x-spi.c parent0c744ea4f77d72b3dcebb7a8f2684633ec79be88 (diff)
tracing: Fix hwlat kthread migration
The hwlat tracer creates a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'sound/soc/codecs/pcm512x-spi.c')