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e6b5be2be4
Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEABECAAYFAlSOD20ACgkQMUfUDdst+ylLPACg2QrW1oHhdTMT9WI8jihlHVRM 53kAoLeteByQ3iVwWurwwseRPiWa8+MI =OVRS -----END PGP SIGNATURE----- Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core update from Greg KH: "Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while" * tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits) Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries" fs: debugfs: add forward declaration for struct device type firmware class: Deletion of an unnecessary check before the function call "vunmap" firmware loader: fix hung task warning dump devcoredump: provide a one-way disable function device: Add dev_<level>_once variants ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries ath: use seq_file api for ath9k debugfs files debugfs: add helper function to create device related seq_file drivers/base: cacheinfo: remove noisy error boot message Revert "core: platform: add warning if driver has no owner" drivers: base: support cpu cache information interface to userspace via sysfs drivers: base: add cpu_device_create to support per-cpu devices topology: replace custom attribute macros with standard DEVICE_ATTR* cpumask: factor out show_cpumap into separate helper function driver core: Fix unbalanced device reference in drivers_probe driver core: fix race with userland in device_add() sysfs/kernfs: make read requests on pre-alloc files use the buffer. sysfs/kernfs: allow attributes to request write buffer be pre-allocated. fs: sysfs: return EGBIG on write if offset is larger than file size ...
389 lines
9.6 KiB
C
389 lines
9.6 KiB
C
/*
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* bf5xx-ac97.c -- AC97 support for the ADI blackfin chip.
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*
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* Author: Roy Huang
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* Created: 11th. June 2007
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* Copyright: Analog Device Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/wait.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/ac97_codec.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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#include <asm/irq.h>
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#include <asm/portmux.h>
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#include <linux/mutex.h>
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#include <linux/gpio.h>
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#include "bf5xx-sport.h"
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#include "bf5xx-ac97.h"
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/* Anomaly notes:
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* 05000250 - AD1980 is running in TDM mode and RFS/TFS are generated by SPORT
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* contrtoller. But, RFSDIV and TFSDIV are always set to 16*16-1,
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* while the max AC97 data size is 13*16. The DIV is always larger
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* than data size. AD73311 and ad2602 are not running in TDM mode.
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* AD1836 and AD73322 depend on external RFS/TFS only. So, this
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* anomaly does not affect blackfin sound drivers.
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*/
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static struct sport_device *ac97_sport_handle;
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void bf5xx_pcm_to_ac97(struct ac97_frame *dst, const __u16 *src,
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size_t count, unsigned int chan_mask)
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{
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while (count--) {
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dst->ac97_tag = TAG_VALID;
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if (chan_mask & SP_FL) {
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dst->ac97_pcm_r = *src++;
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dst->ac97_tag |= TAG_PCM_RIGHT;
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}
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if (chan_mask & SP_FR) {
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dst->ac97_pcm_l = *src++;
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dst->ac97_tag |= TAG_PCM_LEFT;
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}
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#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
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if (chan_mask & SP_SR) {
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dst->ac97_sl = *src++;
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dst->ac97_tag |= TAG_PCM_SL;
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}
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if (chan_mask & SP_SL) {
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dst->ac97_sr = *src++;
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dst->ac97_tag |= TAG_PCM_SR;
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}
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if (chan_mask & SP_LFE) {
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dst->ac97_lfe = *src++;
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dst->ac97_tag |= TAG_PCM_LFE;
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}
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if (chan_mask & SP_FC) {
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dst->ac97_center = *src++;
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dst->ac97_tag |= TAG_PCM_CENTER;
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}
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#endif
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dst++;
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}
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}
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EXPORT_SYMBOL(bf5xx_pcm_to_ac97);
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void bf5xx_ac97_to_pcm(const struct ac97_frame *src, __u16 *dst,
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size_t count)
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{
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while (count--) {
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*(dst++) = src->ac97_pcm_l;
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*(dst++) = src->ac97_pcm_r;
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src++;
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}
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}
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EXPORT_SYMBOL(bf5xx_ac97_to_pcm);
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static unsigned int sport_tx_curr_frag(struct sport_device *sport)
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{
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return sport->tx_curr_frag = sport_curr_offset_tx(sport) /
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sport->tx_fragsize;
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}
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static void enqueue_cmd(struct snd_ac97 *ac97, __u16 addr, __u16 data)
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{
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struct sport_device *sport = ac97_sport_handle;
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int *cmd_count = sport->private_data;
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int nextfrag = sport_tx_curr_frag(sport);
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struct ac97_frame *nextwrite;
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sport_incfrag(sport, &nextfrag, 1);
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nextwrite = (struct ac97_frame *)(sport->tx_buf +
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nextfrag * sport->tx_fragsize);
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pr_debug("sport->tx_buf:%p, nextfrag:0x%x nextwrite:%p, cmd_count:%d\n",
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sport->tx_buf, nextfrag, nextwrite, cmd_count[nextfrag]);
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nextwrite[cmd_count[nextfrag]].ac97_tag |= TAG_CMD;
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nextwrite[cmd_count[nextfrag]].ac97_addr = addr;
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nextwrite[cmd_count[nextfrag]].ac97_data = data;
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++cmd_count[nextfrag];
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pr_debug("ac97_sport: Inserting %02x/%04x into fragment %d\n",
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addr >> 8, data, nextfrag);
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}
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static unsigned short bf5xx_ac97_read(struct snd_ac97 *ac97,
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unsigned short reg)
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{
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struct sport_device *sport_handle = ac97_sport_handle;
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struct ac97_frame out_frame[2], in_frame[2];
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pr_debug("%s enter 0x%x\n", __func__, reg);
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/* When dma descriptor is enabled, the register should not be read */
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if (sport_handle->tx_run || sport_handle->rx_run) {
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pr_err("Could you send a mail to cliff.cai@analog.com "
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"to report this?\n");
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return -EFAULT;
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}
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memset(&out_frame, 0, 2 * sizeof(struct ac97_frame));
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memset(&in_frame, 0, 2 * sizeof(struct ac97_frame));
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out_frame[0].ac97_tag = TAG_VALID | TAG_CMD;
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out_frame[0].ac97_addr = ((reg << 8) | 0x8000);
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sport_send_and_recv(sport_handle, (unsigned char *)&out_frame,
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(unsigned char *)&in_frame,
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2 * sizeof(struct ac97_frame));
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return in_frame[1].ac97_data;
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}
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void bf5xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
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unsigned short val)
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{
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struct sport_device *sport_handle = ac97_sport_handle;
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pr_debug("%s enter 0x%x:0x%04x\n", __func__, reg, val);
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if (sport_handle->tx_run) {
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enqueue_cmd(ac97, (reg << 8), val); /* write */
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enqueue_cmd(ac97, (reg << 8) | 0x8000, 0); /* read back */
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} else {
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struct ac97_frame frame;
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memset(&frame, 0, sizeof(struct ac97_frame));
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frame.ac97_tag = TAG_VALID | TAG_CMD;
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frame.ac97_addr = (reg << 8);
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frame.ac97_data = val;
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sport_send_and_recv(sport_handle, (unsigned char *)&frame, \
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NULL, sizeof(struct ac97_frame));
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}
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}
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static void bf5xx_ac97_warm_reset(struct snd_ac97 *ac97)
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{
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struct sport_device *sport_handle = ac97_sport_handle;
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u16 gpio = P_IDENT(sport_handle->pin_req[3]);
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pr_debug("%s enter\n", __func__);
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peripheral_free_list(sport_handle->pin_req);
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gpio_request(gpio, "bf5xx-ac97");
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gpio_direction_output(gpio, 1);
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udelay(2);
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gpio_set_value(gpio, 0);
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udelay(1);
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gpio_free(gpio);
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peripheral_request_list(sport_handle->pin_req, "soc-audio");
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}
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static void bf5xx_ac97_cold_reset(struct snd_ac97 *ac97)
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{
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#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
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pr_debug("%s enter\n", __func__);
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/* It is specified for bf548-ezkit */
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gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 0);
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/* Keep reset pin low for 1 ms */
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mdelay(1);
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gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
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/* Wait for bit clock recover */
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mdelay(1);
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#else
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pr_info("%s: Not implemented\n", __func__);
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#endif
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}
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static struct snd_ac97_bus_ops bf5xx_ac97_ops = {
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.read = bf5xx_ac97_read,
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.write = bf5xx_ac97_write,
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.warm_reset = bf5xx_ac97_warm_reset,
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.reset = bf5xx_ac97_cold_reset,
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};
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#ifdef CONFIG_PM
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static int bf5xx_ac97_suspend(struct snd_soc_dai *dai)
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{
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struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
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pr_debug("%s : sport %d\n", __func__, dai->id);
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if (!dai->active)
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return 0;
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if (dai->capture_active)
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sport_rx_stop(sport);
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if (dai->playback_active)
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sport_tx_stop(sport);
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return 0;
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}
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static int bf5xx_ac97_resume(struct snd_soc_dai *dai)
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{
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int ret;
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struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
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pr_debug("%s : sport %d\n", __func__, dai->id);
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if (!dai->active)
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return 0;
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#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
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ret = sport_set_multichannel(sport, 16, 0x3FF, 0x3FF, 1);
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#else
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ret = sport_set_multichannel(sport, 16, 0x1F, 0x1F, 1);
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#endif
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if (ret) {
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pr_err("SPORT is busy!\n");
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return -EBUSY;
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}
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ret = sport_config_rx(sport, IRFS, 0xF, 0, (16*16-1));
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if (ret) {
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pr_err("SPORT is busy!\n");
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return -EBUSY;
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}
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ret = sport_config_tx(sport, ITFS, 0xF, 0, (16*16-1));
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if (ret) {
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pr_err("SPORT is busy!\n");
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return -EBUSY;
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}
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return 0;
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}
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#else
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#define bf5xx_ac97_suspend NULL
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#define bf5xx_ac97_resume NULL
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#endif
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static struct snd_soc_dai_driver bfin_ac97_dai = {
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.bus_control = true,
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.suspend = bf5xx_ac97_suspend,
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.resume = bf5xx_ac97_resume,
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.playback = {
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.stream_name = "AC97 Playback",
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.channels_min = 2,
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#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
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.channels_max = 6,
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#else
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.channels_max = 2,
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#endif
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.rates = SNDRV_PCM_RATE_48000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE, },
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.capture = {
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.stream_name = "AC97 Capture",
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.channels_min = 2,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_48000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE, },
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};
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static const struct snd_soc_component_driver bfin_ac97_component = {
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.name = "bfin-ac97",
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};
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static int asoc_bfin_ac97_probe(struct platform_device *pdev)
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{
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struct sport_device *sport_handle;
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int ret;
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#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
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/* Request PB3 as reset pin */
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ret = devm_gpio_request_one(&pdev->dev,
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CONFIG_SND_BF5XX_RESET_GPIO_NUM,
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GPIOF_OUT_INIT_HIGH, "SND_AD198x RESET");
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if (ret) {
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dev_err(&pdev->dev,
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"Failed to request GPIO_%d for reset: %d\n",
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CONFIG_SND_BF5XX_RESET_GPIO_NUM, ret);
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return ret;
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}
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#endif
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sport_handle = sport_init(pdev, 2, sizeof(struct ac97_frame),
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PAGE_SIZE);
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if (!sport_handle) {
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ret = -ENODEV;
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goto sport_err;
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}
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/*SPORT works in TDM mode to simulate AC97 transfers*/
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#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
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ret = sport_set_multichannel(sport_handle, 16, 0x3FF, 0x3FF, 1);
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#else
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ret = sport_set_multichannel(sport_handle, 16, 0x1F, 0x1F, 1);
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#endif
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if (ret) {
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pr_err("SPORT is busy!\n");
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ret = -EBUSY;
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goto sport_config_err;
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}
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ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
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if (ret) {
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pr_err("SPORT is busy!\n");
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ret = -EBUSY;
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goto sport_config_err;
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}
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ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1));
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if (ret) {
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pr_err("SPORT is busy!\n");
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ret = -EBUSY;
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goto sport_config_err;
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}
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ret = snd_soc_set_ac97_ops(&bf5xx_ac97_ops);
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if (ret != 0) {
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dev_err(&pdev->dev, "Failed to set AC'97 ops: %d\n", ret);
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goto sport_config_err;
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}
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ret = snd_soc_register_component(&pdev->dev, &bfin_ac97_component,
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&bfin_ac97_dai, 1);
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if (ret) {
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pr_err("Failed to register DAI: %d\n", ret);
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goto sport_config_err;
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}
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ac97_sport_handle = sport_handle;
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return 0;
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sport_config_err:
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sport_done(sport_handle);
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sport_err:
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snd_soc_set_ac97_ops(NULL);
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return ret;
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}
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static int asoc_bfin_ac97_remove(struct platform_device *pdev)
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{
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struct sport_device *sport_handle = platform_get_drvdata(pdev);
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snd_soc_unregister_component(&pdev->dev);
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sport_done(sport_handle);
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snd_soc_set_ac97_ops(NULL);
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return 0;
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}
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static struct platform_driver asoc_bfin_ac97_driver = {
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.driver = {
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.name = "bfin-ac97",
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},
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.probe = asoc_bfin_ac97_probe,
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.remove = asoc_bfin_ac97_remove,
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};
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module_platform_driver(asoc_bfin_ac97_driver);
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MODULE_AUTHOR("Roy Huang");
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MODULE_DESCRIPTION("AC97 driver for ADI Blackfin");
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MODULE_LICENSE("GPL");
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