From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/sound/soc/blackfin/bf5xx-ac97.c | 388 +++++++++++++++++++++++++++++++++ 1 file changed, 388 insertions(+) create mode 100644 kernel/sound/soc/blackfin/bf5xx-ac97.c (limited to 'kernel/sound/soc/blackfin/bf5xx-ac97.c') diff --git a/kernel/sound/soc/blackfin/bf5xx-ac97.c b/kernel/sound/soc/blackfin/bf5xx-ac97.c new file mode 100644 index 000000000..a040cfe29 --- /dev/null +++ b/kernel/sound/soc/blackfin/bf5xx-ac97.c @@ -0,0 +1,388 @@ +/* + * bf5xx-ac97.c -- AC97 support for the ADI blackfin chip. + * + * Author: Roy Huang + * Created: 11th. June 2007 + * Copyright: Analog Device Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include "bf5xx-sport.h" +#include "bf5xx-ac97.h" + +/* Anomaly notes: + * 05000250 - AD1980 is running in TDM mode and RFS/TFS are generated by SPORT + * contrtoller. But, RFSDIV and TFSDIV are always set to 16*16-1, + * while the max AC97 data size is 13*16. The DIV is always larger + * than data size. AD73311 and ad2602 are not running in TDM mode. + * AD1836 and AD73322 depend on external RFS/TFS only. So, this + * anomaly does not affect blackfin sound drivers. +*/ + +static struct sport_device *ac97_sport_handle; + +void bf5xx_pcm_to_ac97(struct ac97_frame *dst, const __u16 *src, + size_t count, unsigned int chan_mask) +{ + while (count--) { + dst->ac97_tag = TAG_VALID; + if (chan_mask & SP_FL) { + dst->ac97_pcm_r = *src++; + dst->ac97_tag |= TAG_PCM_RIGHT; + } + if (chan_mask & SP_FR) { + dst->ac97_pcm_l = *src++; + dst->ac97_tag |= TAG_PCM_LEFT; + + } +#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT) + if (chan_mask & SP_SR) { + dst->ac97_sl = *src++; + dst->ac97_tag |= TAG_PCM_SL; + } + if (chan_mask & SP_SL) { + dst->ac97_sr = *src++; + dst->ac97_tag |= TAG_PCM_SR; + } + if (chan_mask & SP_LFE) { + dst->ac97_lfe = *src++; + dst->ac97_tag |= TAG_PCM_LFE; + } + if (chan_mask & SP_FC) { + dst->ac97_center = *src++; + dst->ac97_tag |= TAG_PCM_CENTER; + } +#endif + dst++; + } +} +EXPORT_SYMBOL(bf5xx_pcm_to_ac97); + +void bf5xx_ac97_to_pcm(const struct ac97_frame *src, __u16 *dst, + size_t count) +{ + while (count--) { + *(dst++) = src->ac97_pcm_l; + *(dst++) = src->ac97_pcm_r; + src++; + } +} +EXPORT_SYMBOL(bf5xx_ac97_to_pcm); + +static unsigned int sport_tx_curr_frag(struct sport_device *sport) +{ + return sport->tx_curr_frag = sport_curr_offset_tx(sport) / + sport->tx_fragsize; +} + +static void enqueue_cmd(struct snd_ac97 *ac97, __u16 addr, __u16 data) +{ + struct sport_device *sport = ac97_sport_handle; + int *cmd_count = sport->private_data; + int nextfrag = sport_tx_curr_frag(sport); + struct ac97_frame *nextwrite; + + sport_incfrag(sport, &nextfrag, 1); + + nextwrite = (struct ac97_frame *)(sport->tx_buf + + nextfrag * sport->tx_fragsize); + pr_debug("sport->tx_buf:%p, nextfrag:0x%x nextwrite:%p, cmd_count:%d\n", + sport->tx_buf, nextfrag, nextwrite, cmd_count[nextfrag]); + nextwrite[cmd_count[nextfrag]].ac97_tag |= TAG_CMD; + nextwrite[cmd_count[nextfrag]].ac97_addr = addr; + nextwrite[cmd_count[nextfrag]].ac97_data = data; + ++cmd_count[nextfrag]; + pr_debug("ac97_sport: Inserting %02x/%04x into fragment %d\n", + addr >> 8, data, nextfrag); +} + +static unsigned short bf5xx_ac97_read(struct snd_ac97 *ac97, + unsigned short reg) +{ + struct sport_device *sport_handle = ac97_sport_handle; + struct ac97_frame out_frame[2], in_frame[2]; + + pr_debug("%s enter 0x%x\n", __func__, reg); + + /* When dma descriptor is enabled, the register should not be read */ + if (sport_handle->tx_run || sport_handle->rx_run) { + pr_err("Could you send a mail to cliff.cai@analog.com " + "to report this?\n"); + return -EFAULT; + } + + memset(&out_frame, 0, 2 * sizeof(struct ac97_frame)); + memset(&in_frame, 0, 2 * sizeof(struct ac97_frame)); + out_frame[0].ac97_tag = TAG_VALID | TAG_CMD; + out_frame[0].ac97_addr = ((reg << 8) | 0x8000); + sport_send_and_recv(sport_handle, (unsigned char *)&out_frame, + (unsigned char *)&in_frame, + 2 * sizeof(struct ac97_frame)); + return in_frame[1].ac97_data; +} + +void bf5xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg, + unsigned short val) +{ + struct sport_device *sport_handle = ac97_sport_handle; + + pr_debug("%s enter 0x%x:0x%04x\n", __func__, reg, val); + + if (sport_handle->tx_run) { + enqueue_cmd(ac97, (reg << 8), val); /* write */ + enqueue_cmd(ac97, (reg << 8) | 0x8000, 0); /* read back */ + } else { + struct ac97_frame frame; + memset(&frame, 0, sizeof(struct ac97_frame)); + frame.ac97_tag = TAG_VALID | TAG_CMD; + frame.ac97_addr = (reg << 8); + frame.ac97_data = val; + sport_send_and_recv(sport_handle, (unsigned char *)&frame, \ + NULL, sizeof(struct ac97_frame)); + } +} + +static void bf5xx_ac97_warm_reset(struct snd_ac97 *ac97) +{ + struct sport_device *sport_handle = ac97_sport_handle; + u16 gpio = P_IDENT(sport_handle->pin_req[3]); + + pr_debug("%s enter\n", __func__); + + peripheral_free_list(sport_handle->pin_req); + gpio_request(gpio, "bf5xx-ac97"); + gpio_direction_output(gpio, 1); + udelay(2); + gpio_set_value(gpio, 0); + udelay(1); + gpio_free(gpio); + peripheral_request_list(sport_handle->pin_req, "soc-audio"); +} + +static void bf5xx_ac97_cold_reset(struct snd_ac97 *ac97) +{ +#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET + pr_debug("%s enter\n", __func__); + + /* It is specified for bf548-ezkit */ + gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 0); + /* Keep reset pin low for 1 ms */ + mdelay(1); + gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1); + /* Wait for bit clock recover */ + mdelay(1); +#else + pr_info("%s: Not implemented\n", __func__); +#endif +} + +static struct snd_ac97_bus_ops bf5xx_ac97_ops = { + .read = bf5xx_ac97_read, + .write = bf5xx_ac97_write, + .warm_reset = bf5xx_ac97_warm_reset, + .reset = bf5xx_ac97_cold_reset, +}; + +#ifdef CONFIG_PM +static int bf5xx_ac97_suspend(struct snd_soc_dai *dai) +{ + struct sport_device *sport = snd_soc_dai_get_drvdata(dai); + + pr_debug("%s : sport %d\n", __func__, dai->id); + if (!dai->active) + return 0; + if (dai->capture_active) + sport_rx_stop(sport); + if (dai->playback_active) + sport_tx_stop(sport); + return 0; +} + +static int bf5xx_ac97_resume(struct snd_soc_dai *dai) +{ + int ret; + struct sport_device *sport = snd_soc_dai_get_drvdata(dai); + + pr_debug("%s : sport %d\n", __func__, dai->id); + if (!dai->active) + return 0; + +#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT) + ret = sport_set_multichannel(sport, 16, 0x3FF, 0x3FF, 1); +#else + ret = sport_set_multichannel(sport, 16, 0x1F, 0x1F, 1); +#endif + if (ret) { + pr_err("SPORT is busy!\n"); + return -EBUSY; + } + + ret = sport_config_rx(sport, IRFS, 0xF, 0, (16*16-1)); + if (ret) { + pr_err("SPORT is busy!\n"); + return -EBUSY; + } + + ret = sport_config_tx(sport, ITFS, 0xF, 0, (16*16-1)); + if (ret) { + pr_err("SPORT is busy!\n"); + return -EBUSY; + } + + return 0; +} + +#else +#define bf5xx_ac97_suspend NULL +#define bf5xx_ac97_resume NULL +#endif + +static struct snd_soc_dai_driver bfin_ac97_dai = { + .bus_control = true, + .suspend = bf5xx_ac97_suspend, + .resume = bf5xx_ac97_resume, + .playback = { + .stream_name = "AC97 Playback", + .channels_min = 2, +#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT) + .channels_max = 6, +#else + .channels_max = 2, +#endif + .rates = SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE, }, + .capture = { + .stream_name = "AC97 Capture", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE, }, +}; + +static const struct snd_soc_component_driver bfin_ac97_component = { + .name = "bfin-ac97", +}; + +static int asoc_bfin_ac97_probe(struct platform_device *pdev) +{ + struct sport_device *sport_handle; + int ret; + +#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET + /* Request PB3 as reset pin */ + ret = devm_gpio_request_one(&pdev->dev, + CONFIG_SND_BF5XX_RESET_GPIO_NUM, + GPIOF_OUT_INIT_HIGH, "SND_AD198x RESET"); + if (ret) { + dev_err(&pdev->dev, + "Failed to request GPIO_%d for reset: %d\n", + CONFIG_SND_BF5XX_RESET_GPIO_NUM, ret); + return ret; + } +#endif + + sport_handle = sport_init(pdev, 2, sizeof(struct ac97_frame), + PAGE_SIZE); + if (!sport_handle) { + ret = -ENODEV; + goto sport_err; + } + + /*SPORT works in TDM mode to simulate AC97 transfers*/ +#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT) + ret = sport_set_multichannel(sport_handle, 16, 0x3FF, 0x3FF, 1); +#else + ret = sport_set_multichannel(sport_handle, 16, 0x1F, 0x1F, 1); +#endif + if (ret) { + pr_err("SPORT is busy!\n"); + ret = -EBUSY; + goto sport_config_err; + } + + ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1)); + if (ret) { + pr_err("SPORT is busy!\n"); + ret = -EBUSY; + goto sport_config_err; + } + + ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1)); + if (ret) { + pr_err("SPORT is busy!\n"); + ret = -EBUSY; + goto sport_config_err; + } + + ret = snd_soc_set_ac97_ops(&bf5xx_ac97_ops); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to set AC'97 ops: %d\n", ret); + goto sport_config_err; + } + + ret = snd_soc_register_component(&pdev->dev, &bfin_ac97_component, + &bfin_ac97_dai, 1); + if (ret) { + pr_err("Failed to register DAI: %d\n", ret); + goto sport_config_err; + } + + ac97_sport_handle = sport_handle; + + return 0; + +sport_config_err: + sport_done(sport_handle); +sport_err: + snd_soc_set_ac97_ops(NULL); + + return ret; +} + +static int asoc_bfin_ac97_remove(struct platform_device *pdev) +{ + struct sport_device *sport_handle = platform_get_drvdata(pdev); + + snd_soc_unregister_component(&pdev->dev); + sport_done(sport_handle); + snd_soc_set_ac97_ops(NULL); + + return 0; +} + +static struct platform_driver asoc_bfin_ac97_driver = { + .driver = { + .name = "bfin-ac97", + }, + + .probe = asoc_bfin_ac97_probe, + .remove = asoc_bfin_ac97_remove, +}; + +module_platform_driver(asoc_bfin_ac97_driver); + +MODULE_AUTHOR("Roy Huang"); +MODULE_DESCRIPTION("AC97 driver for ADI Blackfin"); +MODULE_LICENSE("GPL"); -- cgit 1.2.3-korg