+++ /dev/null
-/*
- * arch/arm/mach-tegra/include/mach/spdif.h
- *
- *
- * Copyright (c) 2008-2009, NVIDIA Corporation.
- *
- * 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, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
- * MA 02110-1301, USA.
- */
-
-
-#ifndef __ARCH_ARM_MACH_TEGRA_SPDIF_H
-#define __ARCH_ARM_MACH_TEGRA_SPDIF_H
-
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/platform_device.h>
-
-/* Offsets from TEGRA_SPDIF_BASE */
-
-#define SPDIF_CTRL_0 0x0
-#define SPDIF_STATUS_0 0x4
-#define SPDIF_STROBE_CTRL_0 0x8
-#define SPDIF_DATA_FIFO_CSR_0 0x0C
-#define SPDIF_DATA_OUT_0 0x40
-#define SPDIF_DATA_IN_0 0x80
-#define SPDIF_CH_STA_RX_A_0 0x100
-#define SPDIF_CH_STA_RX_B_0 0x104
-#define SPDIF_CH_STA_RX_C_0 0x108
-#define SPDIF_CH_STA_RX_D_0 0x10C
-#define SPDIF_CH_STA_RX_E_0 0x110
-#define SPDIF_CH_STA_RX_F_0 0x114
-#define SPDIF_CH_STA_TX_A_0 0x140
-#define SPDIF_CH_STA_TX_B_0 0x144
-#define SPDIF_CH_STA_TX_C_0 0x148
-#define SPDIF_CH_STA_TX_D_0 0x14C
-#define SPDIF_CH_STA_TX_E_0 0x150
-#define SPDIF_CH_STA_TX_F_0 0x154
-#define SPDIF_USR_STA_RX_A_0 0x180
-#define SPDIF_USR_DAT_TX_A_0 0x1C0
-
-/*
- * Register SPDIF_CTRL_0
- */
-
-/*
- * 1=start capturing from left channel,0=start
- * capturing from right channel.
- */
-#define SPDIF_CTRL_0_CAP_LC (1<<30)
-
-/* SPDIF receiver(RX): 1=enable, 0=disable. */
-#define SPDIF_CTRL_0_RX_EN (1<<29)
-
-/* SPDIF Transmitter(TX): 1=enable, 0=disable. */
-#define SPDIF_CTRL_0_TX_EN (1<<28)
-
-/* Transmit Channel status: 1=enable, 0=disable. */
-#define SPDIF_CTRL_0_TC_EN (1<<27)
-
-/* Transmit user Data: 1=enable, 0=disable. */
-#define SPDIF_CTRL_0_TU_EN (1<<26)
-
-/* Interrupt on transmit error: 1=enable, 0=disable. */
-#define SPDIF_CTRL_0_IE_TXE (1<<25)
-
-/* Interrupt on receive error: 1=enable, 0=disable. */
-#define SPDIF_CTRL_0_IE_RXE (1<<24)
-
-/* Interrupt on invalid preamble: 1=enable, 0=disable. */
-#define SPDIF_CTRL_0_IE_P (1<<23)
-
-/* Interrupt on "B" preamble: 1=enable, 0=disable. */
-#define SPDIF_CTRL_0_IE_B (1<<22)
-
-/*
- * Interrupt when block of channel status received:
- * 1=enable, 0=disable.
- */
-#define SPDIF_CTRL_0_IE_C (1<<21)
-
-/*
- * Interrupt when a valid information unit (IU) recieve:
- * 1=enable, 0=disable.
- */
-#define SPDIF_CTRL_0_IE_U (1<<20)
-
-/*
- * Interrupt when RX user FIFO attn. level is reached:
- * 1=enable, 0=disable.
- */
-#define SPDIF_CTRL_0_QE_RU (1<<19)
-
-/*
- * Interrupt when TX user FIFO attn. level is reached:
- * 1=enable, 0=disable.
- */
-#define SPDIF_CTRL_0_QE_TU (1<<18)
-
-/*
- * Interrupt when RX data FIFO attn. level is reached:
- * 1=enable, 0=disable.
- */
-#define SPDIF_CTRL_0_QE_RX (1<<17)
-
-/*
- * Interrupt when TX data FIFO attn. level is reached:
- * 1=enable, 0=disable.
- */
-#define SPDIF_CTRL_0_QE_TX (1<<16)
-
-/* Loopback test mode: 1=enable internal loopback, 0=Normal mode. */
-#define SPDIF_CTRL_0_LBK_EN (1<<15)
-
-/*
- * Pack data mode:
- * 1=Packeted left/right channel data into a single word,
- * 0=Single data (16 bit needs to be padded to match the
- * interface data bit size)
- */
-#define SPDIF_CTRL_0_PACK (1<<14)
-
-/*
- * 00=16bit data
- * 01=20bit data
- * 10=24bit data
- * 11=raw data
- */
-#define SPDIF_BIT_MODE_MODE16BIT (0)
-#define SPDIF_BIT_MODE_MODE20BIT (1)
-#define SPDIF_BIT_MODE_MODE24BIT (2)
-#define SPDIF_BIT_MODE_MODERAW (3)
-#define SPDIF_CTRL_0_BIT_MODE_SHIFT (12)
-
-#define SPDIF_CTRL_0_BIT_MODE_MASK \
- ((0x3) << SPDIF_CTRL_0_BIT_MODE_SHIFT)
-#define SPDIF_CTRL_0_BIT_MODE_MODE16BIT \
- (SPDIF_BIT_MODE_MODE16BIT << SPDIF_CTRL_0_BIT_MODE_SHIFT)
-#define SPDIF_CTRL_0_BIT_MODE_MODE20BIT \
- (SPDIF_BIT_MODE_MODE20BIT << SPDIF_CTRL_0_BIT_MODE_SHIFT)
-#define SPDIF_CTRL_0_BIT_MODE_MODE24BIT \
- (SPDIF_BIT_MODE_MODE24BIT << SPDIF_CTRL_0_BIT_MODE_SHIFT)
-#define SPDIF_CTRL_0_BIT_MODE_MODERAW \
- (SPDIF_BIT_MODE_MODERAW << SPDIF_CTRL_0_BIT_MODE_SHIFT)
-
-
-/*
- * SPDIF Status Register
- * -------------------------
- * Note: IS_P, IS_B, IS_C, and IS_U are sticky bits.
- * Software must write a 1 to the corresponding bit location
- * to clear the status.
- */
-
-/* Register SPDIF_STATUS_0 */
-
-/*
- * Receiver(RX) shifter is busy receiving data. 1=busy, 0=not busy.
- * This bit is asserted when the receiver first locked onto the
- * preamble of the data stream after RX_EN is asserted. This bit is
- * deasserted when either,
- * (a) the end of a frame is reached after RX_EN is deeasserted, or
- * (b) the SPDIF data stream becomes inactive.
- */
-#define SPDIF_STATUS_0_RX_BSY (1<<29)
-
-
-/*
- * Transmitter(TX) shifter is busy transmitting data.
- * 1=busy, 0=not busy.
- * This bit is asserted when TX_EN is asserted.
- * This bit is deasserted when the end of a frame is reached after
- * TX_EN is deasserted.
- */
-#define SPDIF_STATUS_0_TX_BSY (1<<28)
-
-/*
- * TX is busy shifting out channel status. 1=busy, 0=not busy.
- * This bit is asserted when both TX_EN and TC_EN are asserted and
- * data from CH_STA_TX_A register is loaded into the internal shifter.
- * This bit is deasserted when either,
- * (a) the end of a frame is reached after TX_EN is deasserted, or
- * (b) CH_STA_TX_F register is loaded into the internal shifter.
- */
-#define SPDIF_STATUS_0_TC_BSY (1<<27)
-
-/*
- * TX User data FIFO busy. 1=busy, 0=not busy.
- * This bit is asserted when TX_EN and TXU_EN are asserted and
- * there's data in the TX user FIFO. This bit is deassert when either,
- * (a) the end of a frame is reached after TX_EN is deasserted, or
- * (b) there's no data left in the TX user FIFO.
- */
-#define SPDIF_STATUS_0_TU_BSY (1<<26)
-
-/* Tx FIFO Underrun error status: 1=error, 0=no error */
-#define SPDIF_STATUS_0_TX_ERR (1<<25)
-
-/* Rx FIFO Overrun error status: 1=error, 0=no error */
-#define SPDIF_STATUS_0_RX_ERR (1<<24)
-
-/* Preamble status: 1=bad/missing preamble, 0=Preamble ok */
-#define SPDIF_STATUS_0_IS_P (1<<23)
-
-/* B-preamble detection status: 0=not detected, 1=B-preamble detected */
-#define SPDIF_STATUS_0_IS_B (1<<22)
-
-/*
- * RX channel block data receive status:
- * 1=received entire block of channel status,
- * 0=entire block not recieved yet.
- */
-#define SPDIF_STATUS_0_IS_C (1<<21)
-
-/* RX User Data Valid flag: 1=valid IU detected, 0 = no IU detected. */
-#define SPDIF_STATUS_0_IS_U (1<<20)
-
-/*
- * RX User FIFO Status:
- * 1=attention level reached, 0=attention level not reached.
- */
-#define SPDIF_STATUS_0_QS_RU (1<<19)
-
-/*
- * TX User FIFO Status:
- * 1=attention level reached, 0=attention level not reached.
- */
-#define SPDIF_STATUS_0_QS_TU (1<<18)
-
-/*
- * RX Data FIFO Status:
- * 1=attention level reached, 0=attention level not reached.
- */
-#define SPDIF_STATUS_0_QS_RX (1<<17)
-
-/*
- * TX Data FIFO Status:
- * 1=attention level reached, 0=attention level not reached.
- */
-#define SPDIF_STATUS_0_QS_TX (1<<16)
-
-
-/* SPDIF FIFO Configuration and Status Register */
-
-/* Register SPDIF_DATA_FIFO_CSR_0 */
-
-#define SPDIF_FIFO_ATN_LVL_ONE_SLOT 0
-#define SPDIF_FIFO_ATN_LVL_FOUR_SLOTS 1
-#define SPDIF_FIFO_ATN_LVL_EIGHT_SLOTS 2
-#define SPDIF_FIFO_ATN_LVL_TWELVE_SLOTS 3
-
-
-/* Clear Receiver User FIFO (RX USR.FIFO) */
-#define SPDIF_DATA_FIFO_CSR_0_RU_CLR (1<<31)
-
-/*
- * RX USR.FIFO Attention Level:
- * 00=1-slot-full, 01=2-slots-full, 10=3-slots-full, 11=4-slots-full.
- */
-
-#define SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_RU1 (0)
-#define SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_RU2 (1)
-#define SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_RU3 (2)
-#define SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_RU4 (3)
-
-#define SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_SHIFT (29)
-#define SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_MASK \
- (0x3 << SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_SHIFT)
-#define SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_RU1_WORD_FULL \
- (SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_RU1 << \
- SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_SHIF)
-#define SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_RU2_WORD_FULL \
- (SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_RU2 << \
- SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_SHIF)
-#define SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_RU3_WORD_FULL \
- (SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_RU3 << \
- SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_SHIF)
-#define SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_RU4_WORD_FULL \
- (SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_RU4 << \
- SPDIF_DATA_FIFO_CSR_0_RU_ATN_LVL_SHIF)
-
-/* Number of RX USR.FIFO levels with valid data. */
-#define SPDIF_DATA_FIFO_CSR_0_FULL_COUNT_SHIFT (24)
-#define SPDIF_DATA_FIFO_CSR_0_FULL_COUNT_MASK (0x1f << \
- SPDIF_DATA_FIFO_CSR_0_FULL_COUNT_SHIFT)
-
-/* Clear Transmitter User FIFO (TX USR.FIFO) */
-#define SPDIF_DATA_FIFO_CSR_0_TU_CLR (1<<23)
-
-/*
- * TxUSR.FIFO Attention Level:
- * 11=4-slots-empty, 10=3-slots-empty, 01=2-slots-empty, 00=1-slot-empty.
- */
-
-#define SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_TU1 (0)
-#define SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_TU2 (1)
-#define SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_TU3 (2)
-#define SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_TU4 (3)
-
-#define SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_SHIFT (21)
-#define SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_MASK (0x3 << \
- SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_SHIFT)
-#define SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_TU1_WORD_EMPTY \
- (SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_TU1 << \
- SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_SHIFT)
-#define SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_TU2_WORD_EMPTY \
- (SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_TU2 << \
- SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_SHIFT)
-#define SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_TU3_WORD_EMPTY \
- (SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_TU3 << \
- SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_SHIFT)
-#define SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_TU4_WORD_EMPTY \
- (SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_TU4 << \
- SPDIF_DATA_FIFO_CSR_0_TU_ATN_LVL_SHIFT)
-
-/* Number of Tx USR.FIFO levels that could be filled. */
-#define SPDIF_DATA_FIFO_CSR_0_TU_EMPTY_COUNT_SHIFT (16)
-#define SPDIF_DATA_FIFO_CSR_0_TU_EMPTY_COUNT_FIELD \
- ((0x1f) << SPDIF_DATA_FIFO_CSR_0_TU_EMPTY_COUNT_SHIFT)
-
-/* Clear Receiver Data FIFO (RX DATA.FIFO). */
-#define SPDIF_DATA_FIFO_CSR_0_RX_CLR (1<<15)
-
-/*
- * Rx FIFO Attention Level:
- * 11=12-slots-full, 10=8-slots-full, 01=4-slots-full, 00=1-slot-full.
- */
-#define SPDIF_DATA_FIFO_CSR_0_RX_ATN_LVL_SHIFT (13)
-#define SPDIF_DATA_FIFO_CSR_0_RX_ATN_LVL_MASK \
- (0x3 << SPDIF_DATA_FIFO_CSR_0_RX_ATN_LVL_SHIFT)
-#define SPDIF_DATA_FIFO_CSR_0_RX_ATN_LVL_RX1_WORD_FULL \
- (SPDIF_FIFO_ATN_LVL_ONE_SLOT << \
- SPDIF_DATA_FIFO_CSR_0_RX_ATN_LVL_SHIFT)
-#define SPDIF_DATA_FIFO_CSR_0_RX_ATN_LVL_RX4_WORD_FULL \
- (SPDIF_FIFO_ATN_LVL_FOUR_SLOTS << \
- SPDIF_DATA_FIFO_CSR_0_RX_ATN_LVL_SHIFT)
-#define SPDIF_DATA_FIFO_CSR_0_RX_ATN_LVL_RX8_WORD_FULL \
- (SPDIF_FIFO_ATN_LVL_EIGHT_SLOTS << \
- SPDIF_DATA_FIFO_CSR_0_RX_ATN_LVL_SHIFT)
-#define SPDIF_DATA_FIFO_CSR_0_RX_ATN_LVL_RX12_WORD_FULL \
- (SPDIF_FIFO_ATN_LVL_TWELVE_SLOTS << \
- SPDIF_DATA_FIFO_CSR_0_RX_ATN_LVL_SHIFT)
-
-
-/* Number of RX DATA.FIFO levels with valid data */
-#define SPDIF_DATA_FIFO_CSR_0_RX_DATA_FIFO_FULL_COUNT_SHIFT (8)
-#define SPDIF_DATA_FIFO_CSR_0_RX_DATA_FIFO_FULL_COUNT_FIELD \
- ((0x1f) << SPDIF_DATA_FIFO_CSR_0_RX_DATA_FIFO_FULL_COUNT_SHIFT)
-
-/* Clear Transmitter Data FIFO (TX DATA.FIFO) */
-#define SPDIF_DATA_FIFO_CSR_0_TX_CLR (1<<7)
-
-/*
- * Tx FIFO Attention Level:
- * 11=12-slots-empty, 10=8-slots-empty, 01=4-slots-empty, 00=1-slot-empty
- */
-#define SPDIF_DATA_FIFO_CSR_0_TX_ATN_LVL_SHIFT (5)
-#define SPDIF_DATA_FIFO_CSR_0_TX_ATN_LVL_MASK \
- (0x3 << SPDIF_DATA_FIFO_CSR_0_TX_ATN_LVL_SHIFT)
-#define SPDIF_DATA_FIFO_CSR_0_TX_ATN_LVL_TX1_WORD_FULL \
- (SPDIF_FIFO_ATN_LVL_ONE_SLOT << \
- SPDIF_DATA_FIFO_CSR_0_TX_ATN_LVL_SHIFT)
-#define SPDIF_DATA_FIFO_CSR_0_TX_ATN_LVL_TX4_WORD_FULL \
- (SPDIF_FIFO_ATN_LVL_FOUR_SLOTS << \
- SPDIF_DATA_FIFO_CSR_0_TX_ATN_LVL_SHIFT)
-#define SPDIF_DATA_FIFO_CSR_0_TX_ATN_LVL_TX8_WORD_FULL \
- (SPDIF_FIFO_ATN_LVL_EIGHT_SLOTS << \
- SPDIF_DATA_FIFO_CSR_0_TX_ATN_LVL_SHIFT)
-#define SPDIF_DATA_FIFO_CSR_0_TX_ATN_LVL_TX12_WORD_FULL \
- (SPDIF_FIFO_ATN_LVL_TWELVE_SLOTS << \
- SPDIF_DATA_FIFO_CSR_0_TX_ATN_LVL_SHIFT)
-
-
-/* Number of Tx DATA.FIFO levels that could be filled. */
-#define SPDIF_DATA_FIFO_CSR_0_TD_EMPTY_COUNT_SHIFT (0)
-#define SPDIF_DATA_FIFO_CSR_0_TD_EMPTY_COUNT_MASK \
- ((0x1f) << SPDIF_DATA_FIFO_CSR_0_TD_EMPTY_COUNT_SHIFT)
-
-
-#endif /* __ARCH_ARM_MACH_TEGRA_SPDIF_H */
+++ /dev/null
-/*
- * arch/arm/mach-tegra/tegra_spdif_audio.c
- *
- * S/PDIF audio driver for NVIDIA Tegra SoCs
- *
- * Copyright (c) 2008-2009, NVIDIA Corporation.
- *
- * 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, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/miscdevice.h>
-#include <linux/fs.h>
-#include <linux/mutex.h>
-#include <linux/clk.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/uaccess.h>
-#include <linux/dma-mapping.h>
-#include <linux/dmapool.h>
-#include <linux/err.h>
-#include <linux/spi/spi.h>
-#include <linux/kfifo.h>
-#include <linux/debugfs.h>
-#include <linux/completion.h>
-#include <linux/platform_device.h>
-#include <linux/device.h>
-#include <linux/io.h>
-#include <linux/ktime.h>
-#include <linux/sysfs.h>
-
-#include <linux/tegra_audio.h>
-
-#include <mach/dma.h>
-#include <mach/iomap.h>
-#include <mach/spdif.h>
-#include <mach/audio.h>
-#include <mach/irqs.h>
-
-#include "clock.h"
-
-
-/* per stream (input/output) */
-struct audio_stream {
- int opened;
- struct mutex lock;
-
- struct tegra_audio_buf_config buf_config;
- bool active; /* is DMA or PIO in progress? */
- void *buffer;
- dma_addr_t buf_phys;
- struct kfifo fifo;
- struct completion fifo_completion;
-
- unsigned errors;
-
- int spdif_fifo_atn_level;
-
- ktime_t last_dma_ts;
- struct tegra_dma_channel *dma_chan;
- struct completion stop_completion;
- spinlock_t dma_req_lock; /* guards dma_has_it */
- int dma_has_it;
- struct tegra_dma_req dma_req;
-};
-
-struct spdif_pio_stats {
- u32 spdif_interrupt_count;
- u32 tx_fifo_errors;
- u32 tx_fifo_written;
-};
-
-
-struct audio_driver_state {
- struct list_head next;
-
- struct platform_device *pdev;
- struct tegra_audio_platform_data *pdata;
- phys_addr_t spdif_phys;
- unsigned long spdif_base;
-
- bool using_dma;
- unsigned long dma_req_sel;
-
- int irq; /* for pio mode */
- struct spdif_pio_stats pio_stats;
- const int *in_divs;
- int in_divs_len;
-
- struct miscdevice misc_out;
- struct miscdevice misc_out_ctl;
- struct audio_stream out;
-};
-
-static inline int buf_size(struct audio_stream *s)
-{
- return 1 << s->buf_config.size;
-}
-
-static inline int chunk_size(struct audio_stream *s)
-{
- return 1 << s->buf_config.chunk;
-}
-
-static inline int threshold_size(struct audio_stream *s)
-{
- return 1 << s->buf_config.threshold;
-}
-
-static inline struct audio_driver_state *ads_from_misc_out(struct file *file)
-{
- struct miscdevice *m = file->private_data;
- struct audio_driver_state *ads =
- container_of(m, struct audio_driver_state, misc_out);
- BUG_ON(!ads);
- return ads;
-}
-
-static inline struct audio_driver_state *ads_from_misc_out_ctl(
- struct file *file)
-{
- struct miscdevice *m = file->private_data;
- struct audio_driver_state *ads =
- container_of(m, struct audio_driver_state,
- misc_out_ctl);
- BUG_ON(!ads);
- return ads;
-}
-
-static inline struct audio_driver_state *ads_from_out(
- struct audio_stream *aos)
-{
- return container_of(aos, struct audio_driver_state, out);
-}
-
-static inline void spdif_writel(unsigned long base, u32 val, u32 reg)
-{
- writel(val, base + reg);
-}
-
-static inline u32 spdif_readl(unsigned long base, u32 reg)
-{
- return readl(base + reg);
-}
-
-static inline void spdif_fifo_write(unsigned long base, u32 data)
-{
- spdif_writel(base, data, SPDIF_DATA_OUT_0);
-}
-
-static int spdif_fifo_set_attention_level(unsigned long base,
- unsigned level)
-{
- u32 val;
-
- if (level > SPDIF_FIFO_ATN_LVL_TWELVE_SLOTS) {
- pr_err("%s: invalid fifo level selector %d\n", __func__,
- level);
- return -EINVAL;
- }
-
- val = spdif_readl(base, SPDIF_DATA_FIFO_CSR_0);
-
- val &= ~SPDIF_DATA_FIFO_CSR_0_TX_ATN_LVL_MASK;
- val |= level << SPDIF_DATA_FIFO_CSR_0_TX_ATN_LVL_SHIFT;
-
-
- spdif_writel(base, val, SPDIF_DATA_FIFO_CSR_0);
- return 0;
-}
-
-static void spdif_fifo_enable(unsigned long base, int on)
-{
- u32 val = spdif_readl(base, SPDIF_CTRL_0);
- val &= ~(SPDIF_CTRL_0_TX_EN | SPDIF_CTRL_0_TC_EN);
- val |= on ? (SPDIF_CTRL_0_TX_EN) : 0;
- val |= on ? (SPDIF_CTRL_0_TC_EN) : 0;
-
- spdif_writel(base, val, SPDIF_CTRL_0);
-}
-
-static bool spdif_is_fifo_enabled(unsigned long base)
-{
- u32 val = spdif_readl(base, SPDIF_CTRL_0);
- return !!(val & SPDIF_CTRL_0_TX_EN);
-}
-
-static void spdif_fifo_clear(unsigned long base)
-{
- u32 val = spdif_readl(base, SPDIF_DATA_FIFO_CSR_0);
- val &= ~(SPDIF_DATA_FIFO_CSR_0_TX_CLR | SPDIF_DATA_FIFO_CSR_0_TU_CLR);
- val |= SPDIF_DATA_FIFO_CSR_0_TX_CLR | SPDIF_DATA_FIFO_CSR_0_TU_CLR;
- spdif_writel(base, val, SPDIF_DATA_FIFO_CSR_0);
-}
-
-
-static int spdif_set_bit_mode(unsigned long base, unsigned mode)
-{
- u32 val = spdif_readl(base, SPDIF_CTRL_0);
- val &= ~SPDIF_CTRL_0_BIT_MODE_MASK;
-
- if (mode > SPDIF_BIT_MODE_MODERAW) {
- pr_err("%s: invalid bit_size selector %d\n", __func__,
- mode);
- return -EINVAL;
- }
-
- val |= mode << SPDIF_CTRL_0_BIT_MODE_SHIFT;
-
- spdif_writel(base, val, SPDIF_CTRL_0);
- return 0;
-}
-
-static int spdif_set_fifo_packed(unsigned long base, unsigned on)
-{
- u32 val = spdif_readl(base, SPDIF_CTRL_0);
- val &= ~SPDIF_CTRL_0_PACK;
- val |= on ? SPDIF_CTRL_0_PACK : 0;
- spdif_writel(base, val, SPDIF_CTRL_0);
- return 0;
-}
-
-
-static void spdif_set_fifo_irq_on_err(unsigned long base, int on)
-{
- u32 val = spdif_readl(base, SPDIF_CTRL_0);
- val &= ~SPDIF_CTRL_0_IE_TXE;
- val |= on ? SPDIF_CTRL_0_IE_TXE : 0;
- spdif_writel(base, val, SPDIF_CTRL_0);
-}
-
-
-
-static void spdif_enable_fifos(unsigned long base, int on)
-{
- u32 val = spdif_readl(base, SPDIF_CTRL_0);
- if (on)
- val |= SPDIF_CTRL_0_TX_EN | SPDIF_CTRL_0_TC_EN |
- SPDIF_CTRL_0_IE_TXE;
- else
- val &= ~(SPDIF_CTRL_0_TX_EN | SPDIF_CTRL_0_TC_EN |
- SPDIF_CTRL_0_IE_TXE);
-
- spdif_writel(base, val, SPDIF_CTRL_0);
-}
-
-static inline u32 spdif_get_status(unsigned long base)
-{
- return spdif_readl(base, SPDIF_STATUS_0);
-}
-
-static inline u32 spdif_get_control(unsigned long base)
-{
- return spdif_readl(base, SPDIF_CTRL_0);
-}
-
-static inline void spdif_ack_status(unsigned long base)
-{
- return spdif_writel(base, spdif_readl(base, SPDIF_STATUS_0),
- SPDIF_STATUS_0);
-}
-
-static inline u32 spdif_get_fifo_scr(unsigned long base)
-{
- return spdif_readl(base, SPDIF_DATA_FIFO_CSR_0);
-}
-
-static inline phys_addr_t spdif_get_fifo_phy_base(unsigned long phy_base)
-{
- return phy_base + SPDIF_DATA_OUT_0;
-}
-
-static inline u32 spdif_get_fifo_full_empty_count(unsigned long base)
-{
- u32 val = spdif_readl(base, SPDIF_DATA_FIFO_CSR_0);
- val = val >> SPDIF_DATA_FIFO_CSR_0_TD_EMPTY_COUNT_SHIFT;
- return val & SPDIF_DATA_FIFO_CSR_0_TD_EMPTY_COUNT_MASK;
-}
-
-
-static int spdif_set_sample_rate(struct audio_driver_state *state,
- unsigned int sample_rate)
-{
- unsigned int clock_freq = 0;
- unsigned int parent_clock_freq = 0;
- struct clk *spdif_clk;
-
- unsigned int ch_sta[] = {
- 0x0, /* 44.1, default values */
- 0xf << 4, /* bits 36-39, original sample freq -- 44.1 */
- 0x0,
- 0x0,
- 0x0,
- 0x0,
- };
-
- ch_sta[0] = 0x0;
- ch_sta[1] = 0xf << 4;
-
- switch (sample_rate) {
- case 32000:
- clock_freq = 4096000; /* 4.0960 MHz */
- parent_clock_freq = 12288000;
- ch_sta[0] = 0x3 << 24;
- ch_sta[1] = 0xC << 4;
- break;
- case 44100:
- clock_freq = 5644800; /* 5.6448 MHz */
- parent_clock_freq = 11289600;
- ch_sta[0] = 0x0;
- ch_sta[1] = 0xF << 4;
- break;
- case 48000:
- clock_freq = 6144000; /* 6.1440MHz */
- parent_clock_freq = 12288000;
- ch_sta[0] = 0x2 << 24;
- ch_sta[1] = 0xD << 4;
- break;
- case 88200:
- clock_freq = 11289600; /* 11.2896 MHz */
- parent_clock_freq = 11289600;
- break;
- case 96000:
- clock_freq = 12288000; /* 12.288 MHz */
- parent_clock_freq = 12288000;
- break;
- case 176400:
- clock_freq = 22579200; /* 22.5792 MHz */
- parent_clock_freq = 11289600;
- break;
- case 192000:
- clock_freq = 24576000; /* 24.5760 MHz */
- parent_clock_freq = 12288000;
- break;
- default:
- return -1;
- }
-
- spdif_clk = clk_get(&state->pdev->dev, NULL);
- if (!spdif_clk) {
- dev_err(&state->pdev->dev, "%s: could not get spdif clock\n",
- __func__);
- return -EIO;
- }
-
- clk_set_rate(spdif_clk, clock_freq);
- if (clk_enable(spdif_clk)) {
- dev_err(&state->pdev->dev, "%s: failed to enable spdif_clk"\
- " clock\n", __func__);
- return -EIO;
- }
- pr_info("%s: spdif_clk rate %ld\n", __func__, clk_get_rate(spdif_clk));
-
- spdif_writel(state->spdif_base, ch_sta[0], SPDIF_CH_STA_TX_A_0);
- spdif_writel(state->spdif_base, ch_sta[1], SPDIF_CH_STA_TX_B_0);
- spdif_writel(state->spdif_base, ch_sta[2], SPDIF_CH_STA_TX_C_0);
- spdif_writel(state->spdif_base, ch_sta[3], SPDIF_CH_STA_TX_D_0);
- spdif_writel(state->spdif_base, ch_sta[4], SPDIF_CH_STA_TX_E_0);
- spdif_writel(state->spdif_base, ch_sta[5], SPDIF_CH_STA_TX_F_0);
-
- return 0;
-}
-
-
-#define PCM_IN_BUFFER_PADDING (1<<6) /* bytes */
-#define PCM_BUFFER_MAX_SIZE_ORDER (PAGE_SHIFT + 2)
-#define PCM_BUFFER_DMA_CHUNK_SIZE_ORDER (PCM_BUFFER_MAX_SIZE_ORDER - 1)
-#define PCM_BUFFER_THRESHOLD_ORDER PCM_BUFFER_DMA_CHUNK_SIZE_ORDER
-#define PCM_DMA_CHUNK_MIN_SIZE_ORDER 3
-
-static int init_stream_buffer(struct audio_stream *,
- struct tegra_audio_buf_config *cfg, unsigned);
-
-static int setup_dma(struct audio_driver_state *);
-static void tear_down_dma(struct audio_driver_state *);
-static int start_dma_playback(struct audio_stream *);
-static void stop_dma_playback(struct audio_stream *);
-
-static int setup_pio(struct audio_driver_state *);
-static void tear_down_pio(struct audio_driver_state *);
-static int start_pio_playback(struct audio_stream *);
-static void stop_pio_playback(struct audio_stream *);
-
-
-struct sound_ops {
- int (*setup)(struct audio_driver_state *);
- void (*tear_down)(struct audio_driver_state *);
- int (*start_playback)(struct audio_stream *);
- void (*stop_playback)(struct audio_stream *);
-};
-
-static const struct sound_ops dma_sound_ops = {
- .setup = setup_dma,
- .tear_down = tear_down_dma,
- .start_playback = start_dma_playback,
- .stop_playback = stop_dma_playback,
-};
-
-static const struct sound_ops pio_sound_ops = {
- .setup = setup_pio,
- .tear_down = tear_down_pio,
- .start_playback = start_pio_playback,
- .stop_playback = stop_pio_playback,
-};
-
-static const struct sound_ops *sound_ops = &dma_sound_ops;
-
-static int start_playback(struct audio_stream *aos)
-{
- int rc;
- unsigned long flags;
- spin_lock_irqsave(&aos->dma_req_lock, flags);
- pr_debug("%s: starting playback\n", __func__);
- rc = sound_ops->start_playback(aos);
- spin_unlock_irqrestore(&aos->dma_req_lock, flags);
- return rc;
-}
-
-
-static bool stop_playback_if_necessary(struct audio_stream *aos)
-{
- unsigned long flags;
- spin_lock_irqsave(&aos->dma_req_lock, flags);
- if (kfifo_is_empty(&aos->fifo)) {
- sound_ops->stop_playback(aos);
- if (aos->active)
- aos->errors++;
- spin_unlock_irqrestore(&aos->dma_req_lock, flags);
- return true;
- }
- spin_unlock_irqrestore(&aos->dma_req_lock, flags);
-
- return false;
-}
-
-
-static void toggle_dma(struct audio_driver_state *ads)
-{
- pr_info("%s: %s\n", __func__, ads->using_dma ? "pio" : "dma");
- sound_ops->tear_down(ads);
- sound_ops = ads->using_dma ? &pio_sound_ops : &dma_sound_ops;
- sound_ops->setup(ads);
- ads->using_dma = !ads->using_dma;
-}
-
-/* DMA */
-
-static int resume_dma_playback(struct audio_stream *aos);
-
-static void setup_dma_tx_request(struct tegra_dma_req *req,
- struct audio_stream *aos);
-
-static int setup_dma(struct audio_driver_state *ads)
-{
- int rc;
- pr_info("%s\n", __func__);
-
- /* setup audio playback */
- ads->out.buf_phys = dma_map_single(&ads->pdev->dev, ads->out.buffer,
- 1 << PCM_BUFFER_MAX_SIZE_ORDER, DMA_TO_DEVICE);
- BUG_ON(!ads->out.buf_phys);
- setup_dma_tx_request(&ads->out.dma_req, &ads->out);
- ads->out.dma_chan = tegra_dma_allocate_channel(TEGRA_DMA_MODE_ONESHOT);
- if (!ads->out.dma_chan) {
- pr_err("%s: could not allocate output SPDIF DMA channel: %ld\n",
- __func__, PTR_ERR(ads->out.dma_chan));
- rc = -ENODEV;
- goto fail_tx;
- }
- return 0;
-
-
-fail_tx:
- dma_unmap_single(&ads->pdev->dev, ads->out.buf_phys,
- 1 << PCM_BUFFER_MAX_SIZE_ORDER, DMA_TO_DEVICE);
- tegra_dma_free_channel(ads->out.dma_chan);
- ads->out.dma_chan = 0;
-
- return rc;
-}
-
-static void tear_down_dma(struct audio_driver_state *ads)
-{
- pr_info("%s\n", __func__);
-
- tegra_dma_free_channel(ads->out.dma_chan);
- ads->out.dma_chan = NULL;
- dma_unmap_single(&ads->pdev->dev, ads->out.buf_phys,
- buf_size(&ads->out),
- DMA_TO_DEVICE);
- ads->out.buf_phys = 0;
-
-}
-
-static void dma_tx_complete_callback(struct tegra_dma_req *req)
-{
- unsigned long flags;
- struct audio_stream *aos = req->dev;
- int count = req->bytes_transferred;
- u64 delta_us;
- u64 max_delay_us = count * 10000 / (4 * 441);
-
- pr_debug("%s bytes transferred %d\n", __func__, count);
-
- aos->dma_has_it = false;
- delta_us = ktime_to_us(ktime_sub(ktime_get_real(), aos->last_dma_ts));
-
- if (delta_us > max_delay_us) {
- pr_debug("%s: too late by %lld us\n", __func__,
- delta_us - max_delay_us);
- aos->errors++;
- }
-
- kfifo_skip(&aos->fifo, count);
-
- if (kfifo_avail(&aos->fifo) >= threshold_size(aos) &&
- !completion_done(&aos->fifo_completion)) {
- pr_debug("%s: complete (%d avail)\n", __func__,
- kfifo_avail(&aos->fifo));
- complete(&aos->fifo_completion);
- }
-
- if (stop_playback_if_necessary(aos))
- return;
- spin_lock_irqsave(&aos->dma_req_lock, flags);
- resume_dma_playback(aos);
- spin_unlock_irqrestore(&aos->dma_req_lock, flags);
-}
-
-static void setup_dma_tx_request(struct tegra_dma_req *req,
- struct audio_stream *aos)
-{
- struct audio_driver_state *ads = ads_from_out(aos);
-
- memset(req, 0, sizeof(*req));
-
- req->complete = dma_tx_complete_callback;
- req->dev = aos;
- req->to_memory = false;
- req->dest_addr = spdif_get_fifo_phy_base(ads->spdif_phys);
- req->dest_wrap = 4;
- req->dest_bus_width = 16;
- req->source_bus_width = 32;
- req->source_wrap = 0;
- req->req_sel = ads->dma_req_sel;
-}
-
-
-/* Called with aos->dma_req_lock taken. */
-static int resume_dma_playback(struct audio_stream *aos)
-{
- int rc;
- struct audio_driver_state *ads = ads_from_out(aos);
- struct tegra_dma_req *req = &aos->dma_req;
-
- unsigned out, in;
-
- out = __kfifo_off(&aos->fifo, aos->fifo.out);
- in = __kfifo_off(&aos->fifo, aos->fifo.in);
-
- /* stop_playback_if_necessary() already checks to see if the fifo is
- * empty.
- */
- BUG_ON(!kfifo_len(&aos->fifo));
-
- if (aos->dma_has_it) {
- pr_debug("%s: playback already in progress\n", __func__);
- return 0;
- }
-
-#if 0
- spdif_fifo_clear(ads->spdif_base);
-#endif
- spdif_fifo_set_attention_level(ads->spdif_base,
- aos->spdif_fifo_atn_level);
-
- req->source_addr = aos->buf_phys + out;
- if (out < in)
- req->size = in - out;
- else
- req->size = kfifo_size(&aos->fifo) - out;
-
- dma_sync_single_for_device(NULL,
- aos->buf_phys + out, req->size, DMA_TO_DEVICE);
-
- /* Don't send all the data yet. */
- if (req->size > chunk_size(aos))
- req->size = chunk_size(aos);
- pr_debug("%s resume playback (%d in fifo, writing %d, in %d out %d)\n",
- __func__, kfifo_len(&aos->fifo), req->size, in, out);
-
- spdif_fifo_enable(ads->spdif_base, 1);
-
- aos->last_dma_ts = ktime_get_real();
- rc = tegra_dma_enqueue_req(aos->dma_chan, req);
- aos->dma_has_it = !rc;
- if (!aos->dma_has_it)
- pr_err("%s: could not enqueue TX DMA req\n", __func__);
- return rc;
-}
-
-/* Called with aos->dma_req_lock taken. */
-static int start_dma_playback(struct audio_stream *aos)
-{
- return resume_dma_playback(aos);
-}
-
-/* Called with aos->dma_req_lock taken. */
-static void stop_dma_playback(struct audio_stream *aos)
-{
- int spin = 0;
- struct audio_driver_state *ads = ads_from_out(aos);
- pr_debug("%s\n", __func__);
- spdif_fifo_enable(ads->spdif_base, 0);
- while ((spdif_get_status(ads->spdif_base) & SPDIF_STATUS_0_TX_BSY) &&
- spin < 100)
- if (spin++ > 50)
- pr_info("%s: spin %d\n", __func__, spin);
- if (spin == 100)
- pr_warn("%s: spinny\n", __func__);
-}
-
-/* PIO (non-DMA) */
-
-static int setup_pio(struct audio_driver_state *ads)
-{
- pr_info("%s\n", __func__);
- enable_irq(ads->irq);
- return 0;
-}
-
-static void tear_down_pio(struct audio_driver_state *ads)
-{
- pr_info("%s\n", __func__);
- disable_irq(ads->irq);
-}
-
-static int start_pio_playback(struct audio_stream *aos)
-{
- struct audio_driver_state *ads = ads_from_out(aos);
-
- if (spdif_is_fifo_enabled(ads->spdif_base)) {
- pr_debug("%s: playback is already in progress\n", __func__);
- return 0;
- }
-
- pr_debug("%s\n", __func__);
-
- spdif_fifo_set_attention_level(ads->spdif_base,
- aos->spdif_fifo_atn_level);
-#if 0
- spdif_fifo_clear(ads->spdif_base);
-#endif
-
- spdif_set_fifo_irq_on_err(ads->spdif_base, 1);
- spdif_fifo_enable(ads->spdif_base, 1);
-
- return 0;
-}
-
-static void stop_pio_playback(struct audio_stream *aos)
-{
- struct audio_driver_state *ads = ads_from_out(aos);
-
- spdif_set_fifo_irq_on_err(ads->spdif_base, 0);
- spdif_fifo_enable(ads->spdif_base, 0);
- while (spdif_get_status(ads->spdif_base) & SPDIF_STATUS_0_TX_BSY)
- /* spin */;
-
- pr_info("%s: interrupts %d\n", __func__,
- ads->pio_stats.spdif_interrupt_count);
- pr_info("%s: sent %d\n", __func__,
- ads->pio_stats.tx_fifo_written);
- pr_info("%s: tx errors %d\n", __func__,
- ads->pio_stats.tx_fifo_errors);
-
- memset(&ads->pio_stats, 0, sizeof(ads->pio_stats));
-}
-
-
-static irqreturn_t spdif_interrupt(int irq, void *data)
-{
- struct audio_driver_state *ads = data;
- u32 status = spdif_get_status(ads->spdif_base);
-
- pr_debug("%s: %08x\n", __func__, status);
-
- ads->pio_stats.spdif_interrupt_count++;
-
- if (status & SPDIF_CTRL_0_IE_TXE)
- ads->pio_stats.tx_fifo_errors++;
-
-#if 0
- if (status & SPDIF_STATUS_0_TX_ERR)
-#endif
- spdif_ack_status(ads->spdif_base);
-
- if (status & SPDIF_STATUS_0_QS_TX) {
- int written;
- int empty;
- int len;
- u16 fifo_buffer[32];
-
- struct audio_stream *out = &ads->out;
-
- if (!spdif_is_fifo_enabled(ads->spdif_base)) {
- pr_debug("%s: tx fifo not enabled, skipping\n",
- __func__);
- goto done;
- }
-
- pr_debug("%s tx fifo is ready\n", __func__);
-
- if (kfifo_avail(&out->fifo) > threshold_size(out) &&
- !completion_done(&out->fifo_completion)) {
- pr_debug("%s: tx complete (%d avail)\n", __func__,
- kfifo_avail(&out->fifo));
- complete(&out->fifo_completion);
- }
-
- if (stop_playback_if_necessary(out))
- goto done;
-
- empty = spdif_get_fifo_full_empty_count(ads->spdif_base);
-
- len = kfifo_out(&out->fifo, fifo_buffer,
- empty * sizeof(u16));
- len /= sizeof(u16);
-
- written = 0;
- while (empty-- && written < len) {
- ads->pio_stats.tx_fifo_written += written * sizeof(u16);
- spdif_fifo_write(ads->spdif_base,
- fifo_buffer[written++]);
- }
-
- /* TODO: Should we check to see if we wrote less than the
- * FIFO threshold and adjust it if so?
- */
-
- if (written) {
- /* start the transaction */
- pr_debug("%s: enabling fifo (%d samples written)\n",
- __func__, written);
- spdif_fifo_enable(ads->spdif_base, 1);
- }
- }
-
-done:
- pr_debug("%s: done %08x\n", __func__,
- spdif_get_status(ads->spdif_base));
- return IRQ_HANDLED;
-}
-
-static ssize_t tegra_spdif_write(struct file *file,
- const char __user *buf, size_t size, loff_t *off)
-{
- ssize_t rc, total = 0;
- unsigned nw = 0;
-
- struct audio_driver_state *ads = ads_from_misc_out(file);
-
- mutex_lock(&ads->out.lock);
-
- ads->out.active = true;
-
- if (!IS_ALIGNED(size, 4)) {
- pr_err("%s: user size request %d not aligned to 4\n",
- __func__, size);
- rc = -EINVAL;
- goto done;
- }
-
- pr_debug("%s: write %d bytes, %d available\n", __func__,
- size, kfifo_avail(&ads->out.fifo));
-
-again:
- rc = kfifo_from_user(&ads->out.fifo, buf + total, size - total, &nw);
- if (rc < 0) {
- pr_err("%s: error copying from user\n", __func__);
- goto done;
- }
-
- rc = start_playback(&ads->out);
- if (rc < 0) {
- pr_err("%s: could not start playback: %d\n", __func__, rc);
- goto done;
- }
-
- total += nw;
- if (total < size) {
- pr_debug("%s: sleep (user %d total %d nw %d)\n", __func__,
- size, total, nw);
- mutex_unlock(&ads->out.lock);
- rc = wait_for_completion_interruptible(
- &ads->out.fifo_completion);
- mutex_lock(&ads->out.lock);
- if (rc == -ERESTARTSYS) {
- pr_warn("%s: interrupted\n", __func__);
- goto done;
- }
- pr_debug("%s: awake\n", __func__);
- goto again;
- }
-
- rc = total;
- *off += total;
-
-done:
- ads->out.active = false;
- mutex_unlock(&ads->out.lock);
- return rc;
-}
-
-static long tegra_spdif_out_ioctl(struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int rc = 0;
- struct audio_driver_state *ads = ads_from_misc_out_ctl(file);
- struct audio_stream *aos = &ads->out;
-
- mutex_lock(&aos->lock);
-
- switch (cmd) {
- case TEGRA_AUDIO_OUT_SET_BUF_CONFIG: {
- struct tegra_audio_buf_config cfg;
- if (copy_from_user(&cfg, (void __user *)arg, sizeof(cfg))) {
- rc = -EFAULT;
- break;
- }
- if (aos->active) {
- pr_err("%s: playback in progress\n", __func__);
- rc = -EBUSY;
- break;
- }
- rc = init_stream_buffer(aos, &cfg, 0);
- if (rc < 0)
- break;
- aos->buf_config = cfg;
- }
- break;
- case TEGRA_AUDIO_OUT_GET_BUF_CONFIG:
- if (copy_to_user((void __user *)arg, &aos->buf_config,
- sizeof(aos->buf_config)))
- rc = -EFAULT;
- break;
- case TEGRA_AUDIO_OUT_GET_ERROR_COUNT:
- if (copy_to_user((void __user *)arg, &aos->errors,
- sizeof(aos->errors)))
- rc = -EFAULT;
- if (!rc)
- aos->errors = 0;
- break;
- case TEGRA_AUDIO_OUT_PRELOAD_FIFO: {
- struct tegra_audio_out_preload preload;
- if (copy_from_user(&preload, (void __user *)arg,
- sizeof(preload))) {
- rc = -EFAULT;
- break;
- }
- rc = kfifo_from_user(&ads->out.fifo,
- (void __user *)preload.data, preload.len,
- &preload.len_written);
- if (rc < 0) {
- pr_err("%s: error copying from user\n", __func__);
- break;
- }
- if (copy_to_user((void __user *)arg, &preload, sizeof(preload)))
- rc = -EFAULT;
- pr_info("%s: preloaded output fifo with %d bytes\n", __func__,
- preload.len_written);
- }
- break;
- default:
- rc = -EINVAL;
- }
-
- mutex_unlock(&aos->lock);
- return rc;
-}
-
-
-
-static int tegra_spdif_out_open(struct inode *inode, struct file *file)
-{
- int rc = 0;
- struct audio_driver_state *ads = ads_from_misc_out(file);
-
- pr_info("%s\n", __func__);
-
- mutex_lock(&ads->out.lock);
- if (!ads->out.opened++) {
- pr_info("%s: resetting fifo and error count\n", __func__);
- ads->out.errors = 0;
- kfifo_reset(&ads->out.fifo);
- }
- rc = spdif_set_sample_rate(ads, 44100);
-
- mutex_unlock(&ads->out.lock);
-
- return rc;
-}
-
-static int tegra_spdif_out_release(struct inode *inode, struct file *file)
-{
- struct audio_driver_state *ads = ads_from_misc_out(file);
- struct clk *spdif_clk;
-
- pr_info("%s\n", __func__);
-
- mutex_lock(&ads->out.lock);
- if (ads->out.opened)
- ads->out.opened--;
- if (!ads->out.opened)
- stop_playback_if_necessary(&ads->out);
-
- spdif_clk = clk_get(&ads->pdev->dev, NULL);
- if (!spdif_clk) {
- dev_err(&ads->pdev->dev, "%s: could not get spdif clock\n",
- __func__);
- return -EIO;
- }
- clk_disable(spdif_clk);
- mutex_unlock(&ads->out.lock);
-
- return 0;
-}
-
-static const struct file_operations tegra_spdif_out_fops = {
- .owner = THIS_MODULE,
- .open = tegra_spdif_out_open,
- .release = tegra_spdif_out_release,
- .write = tegra_spdif_write,
-};
-
-static int tegra_spdif_ctl_open(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-static int tegra_spdif_ctl_release(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-static const struct file_operations tegra_spdif_out_ctl_fops = {
- .owner = THIS_MODULE,
- .open = tegra_spdif_ctl_open,
- .release = tegra_spdif_ctl_release,
- .unlocked_ioctl = tegra_spdif_out_ioctl,
-};
-
-static int init_stream_buffer(struct audio_stream *s,
- struct tegra_audio_buf_config *cfg,
- unsigned padding)
-{
- pr_info("%s (size %d threshold %d chunk %d)\n", __func__,
- cfg->size, cfg->threshold, cfg->chunk);
-
- if (cfg->chunk < PCM_DMA_CHUNK_MIN_SIZE_ORDER) {
- pr_err("%s: chunk %d too small (%d min)\n", __func__,
- cfg->chunk, PCM_DMA_CHUNK_MIN_SIZE_ORDER);
- return -EINVAL;
- }
-
- if (cfg->chunk > cfg->size) {
- pr_err("%s: chunk %d > size %d\n", __func__,
- cfg->chunk, cfg->size);
- return -EINVAL;
- }
-
- if (cfg->threshold > cfg->size) {
- pr_err("%s: threshold %d > size %d\n", __func__,
- cfg->threshold, cfg->size);
- return -EINVAL;
- }
-
- if ((1 << cfg->size) < padding) {
- pr_err("%s: size %d < buffer padding %d (bytes)\n", __func__,
- cfg->size, padding);
- return -EINVAL;
- }
-
- if (cfg->size > PCM_BUFFER_MAX_SIZE_ORDER) {
- pr_err("%s: size %d exceeds max %d\n", __func__,
- cfg->size, PCM_BUFFER_MAX_SIZE_ORDER);
- return -EINVAL;
- }
-
- if (!s->buffer) {
- pr_debug("%s: allocating buffer (size %d, padding %d)\n",
- __func__, 1 << cfg->size, padding);
- s->buffer = kmalloc((1 << cfg->size) + padding,
- GFP_KERNEL | GFP_DMA);
- }
- if (!s->buffer) {
- pr_err("%s: could not allocate output buffer\n", __func__);
- return -ENOMEM;
- }
-
- kfifo_init(&s->fifo, s->buffer, 1 << cfg->size);
- return 0;
-}
-
-
-static int setup_misc_device(struct miscdevice *misc,
- const struct file_operations *fops,
- const char *fmt, ...)
-{
- int rc = 0;
- va_list args;
- const int sz = 64;
-
- va_start(args, fmt);
-
- memset(misc, 0, sizeof(*misc));
- misc->minor = MISC_DYNAMIC_MINOR;
- misc->name = kmalloc(sz, GFP_KERNEL);
- if (!misc->name) {
- rc = -ENOMEM;
- goto done;
- }
-
- vsnprintf((char *)misc->name, sz, fmt, args);
- misc->fops = fops;
- if (misc_register(misc)) {
- pr_err("%s: could not register %s\n", __func__, misc->name);
- kfree(misc->name);
- rc = -EIO;
- goto done;
- }
-
-done:
- va_end(args);
- return rc;
-}
-
-static ssize_t dma_toggle_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct tegra_audio_platform_data *pdata = dev->platform_data;
- struct audio_driver_state *ads = pdata->driver_data;
- return sprintf(buf, "%s\n", ads->using_dma ? "dma" : "pio");
-}
-
-static ssize_t dma_toggle_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- int use_dma;
- struct tegra_audio_platform_data *pdata = dev->platform_data;
- struct audio_driver_state *ads = pdata->driver_data;
-
- if (count < 4)
- return -EINVAL;
-
- use_dma = 0;
- if (!strncmp(buf, "dma", 3))
- use_dma = 1;
- else if (strncmp(buf, "pio", 3)) {
- dev_err(dev, "%s: invalid string [%s]\n", __func__, buf);
- return -EINVAL;
- }
-
- mutex_lock(&ads->out.lock);
- if (ads->out.active) {
- dev_err(dev, "%s: playback or recording in progress.\n",
- __func__);
- mutex_unlock(&ads->out.lock);
- return -EBUSY;
- }
- if (!!use_dma ^ !!ads->using_dma)
- toggle_dma(ads);
- else
- dev_info(dev, "%s: no change\n", __func__);
- mutex_unlock(&ads->out.lock);
-
- return count;
-}
-
-static DEVICE_ATTR(dma_toggle, 0644, dma_toggle_show, dma_toggle_store);
-
-static ssize_t __attr_fifo_atn_read(char *buf, int atn_lvl)
-{
- switch (atn_lvl) {
- case SPDIF_FIFO_ATN_LVL_ONE_SLOT:
- strncpy(buf, "1\n", 2);
- return 2;
- case SPDIF_FIFO_ATN_LVL_FOUR_SLOTS:
- strncpy(buf, "4\n", 2);
- return 2;
- case SPDIF_FIFO_ATN_LVL_EIGHT_SLOTS:
- strncpy(buf, "8\n", 2);
- return 2;
- case SPDIF_FIFO_ATN_LVL_TWELVE_SLOTS:
- strncpy(buf, "12\n", 3);
- return 3;
- default:
- BUG_ON(1);
- return -EIO;
- }
-}
-
-static ssize_t __attr_fifo_atn_write(struct audio_driver_state *ads,
- struct audio_stream *as,
- int *fifo_lvl,
- const char *buf, size_t size)
-{
- int lvl;
-
- if (size > 3) {
- pr_err("%s: buffer size %d too big\n", __func__, size);
- return -EINVAL;
- }
-
- if (sscanf(buf, "%d", &lvl) != 1) {
- pr_err("%s: invalid input string [%s]\n", __func__, buf);
- return -EINVAL;
- }
-
- switch (lvl) {
- case 1:
- lvl = SPDIF_FIFO_ATN_LVL_ONE_SLOT;
- break;
- case 4:
- lvl = SPDIF_FIFO_ATN_LVL_FOUR_SLOTS;
- break;
- case 8:
- lvl = SPDIF_FIFO_ATN_LVL_EIGHT_SLOTS;
- break;
- case 12:
- lvl = SPDIF_FIFO_ATN_LVL_TWELVE_SLOTS;
- break;
- default:
- pr_err("%s: invalid attention level %d\n", __func__, lvl);
- return -EINVAL;
- }
-
- mutex_lock(&as->lock);
- if (as->active) {
- pr_err("%s: in progress.\n", __func__);
- mutex_unlock(&as->lock);
- return -EBUSY;
- }
- *fifo_lvl = lvl;
- pr_info("%s: fifo level %d\n", __func__, *fifo_lvl);
- mutex_unlock(&as->lock);
-
- return size;
-}
-
-static ssize_t tx_fifo_atn_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct tegra_audio_platform_data *pdata = dev->platform_data;
- struct audio_driver_state *ads = pdata->driver_data;
- return __attr_fifo_atn_read(buf, ads->out.spdif_fifo_atn_level);
-}
-
-static ssize_t tx_fifo_atn_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct tegra_audio_platform_data *pdata = dev->platform_data;
- struct audio_driver_state *ads = pdata->driver_data;
- return __attr_fifo_atn_write(ads, &ads->out,
- &ads->out.spdif_fifo_atn_level, buf, count);
-}
-
-static DEVICE_ATTR(tx_fifo_atn, 0644, tx_fifo_atn_show, tx_fifo_atn_store);
-
-
-static int tegra_spdif_probe(struct platform_device *pdev)
-{
- int rc;
- struct resource *res;
- struct audio_driver_state *state;
-
- pr_info("%s\n", __func__);
-
- state = kzalloc(sizeof(*state), GFP_KERNEL);
- if (!state)
- return -ENOMEM;
-
- state->pdev = pdev;
- state->pdata = pdev->dev.platform_data;
- state->pdata->driver_data = state;
- BUG_ON(!state->pdata);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "no mem resource!\n");
- return -ENODEV;
- }
-
- if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
- dev_err(&pdev->dev, "memory region already claimed!\n");
- return -ENOMEM;
- }
-
- state->spdif_phys = res->start;
- state->spdif_base = (unsigned long)ioremap(res->start,
- res->end - res->start + 1);
- if (!state->spdif_base) {
- dev_err(&pdev->dev, "cannot remap iomem!\n");
- return -EIO;
- }
-
- state->out.spdif_fifo_atn_level = SPDIF_FIFO_ATN_LVL_FOUR_SLOTS;
-
- res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
- if (!res) {
- dev_err(&pdev->dev, "no dma resource!\n");
- return -ENODEV;
- }
- state->dma_req_sel = res->start;
-
- res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!res) {
- dev_err(&pdev->dev, "no irq resource!\n");
- return -ENODEV;
- }
- state->irq = res->start;
-
- memset(&state->pio_stats, 0, sizeof(state->pio_stats));
-
- /* disable interrupts from SPDIF */
- spdif_fifo_clear(state->spdif_base);
- spdif_enable_fifos(state->spdif_base, 0);
-
- spdif_set_bit_mode(state->spdif_base, state->pdata->mode);
- spdif_set_fifo_packed(state->spdif_base, state->pdata->fifo_fmt);
-
- state->out.opened = 0;
- state->out.active = false;
- mutex_init(&state->out.lock);
- init_completion(&state->out.fifo_completion);
- init_completion(&state->out.stop_completion);
- spin_lock_init(&state->out.dma_req_lock);
- state->out.buf_phys = 0;
- state->out.dma_chan = NULL;
- state->out.dma_has_it = false;
-
- state->out.buffer = 0;
- state->out.buf_config.size = PCM_BUFFER_MAX_SIZE_ORDER;
- state->out.buf_config.threshold = PCM_BUFFER_THRESHOLD_ORDER;
- state->out.buf_config.chunk = PCM_BUFFER_DMA_CHUNK_SIZE_ORDER;
- rc = init_stream_buffer(&state->out, &state->out.buf_config, 0);
- if (rc < 0)
- return rc;
-
- if (request_irq(state->irq, spdif_interrupt,
- IRQF_DISABLED, state->pdev->name, state) < 0) {
- dev_err(&pdev->dev,
- "%s: could not register handler for irq %d\n",
- __func__, state->irq);
- return -EIO;
- }
-
- rc = setup_misc_device(&state->misc_out,
- &tegra_spdif_out_fops,
- "spdif_out");
- if (rc < 0)
- return rc;
-
- rc = setup_misc_device(&state->misc_out_ctl,
- &tegra_spdif_out_ctl_fops,
- "spdif_out_ctl");
- if (rc < 0)
- return rc;
-
-
- state->using_dma = state->pdata->dma_on;
- if (!state->using_dma)
- sound_ops = &pio_sound_ops;
- sound_ops->setup(state);
-
- rc = device_create_file(&pdev->dev, &dev_attr_dma_toggle);
- if (rc < 0) {
- dev_err(&pdev->dev, "%s: could not create sysfs entry %s: %d\n",
- __func__, dev_attr_dma_toggle.attr.name, rc);
- return rc;
- }
-
- rc = device_create_file(&pdev->dev, &dev_attr_tx_fifo_atn);
- if (rc < 0) {
- dev_err(&pdev->dev, "%s: could not create sysfs entry %s: %d\n",
- __func__, dev_attr_tx_fifo_atn.attr.name, rc);
- return rc;
- }
-
- return 0;
-}
-
-static struct platform_driver tegra_spdif_driver = {
- .driver = {
- .name = "spdif_out",
- .owner = THIS_MODULE,
- },
- .probe = tegra_spdif_probe,
-};
-
-static int __init tegra_spdif_init(void)
-{
- return platform_driver_register(&tegra_spdif_driver);
-}
-
-module_init(tegra_spdif_init);
-MODULE_LICENSE("GPL");
projects / firefly-linux-kernel-4.4.55.git / commitdiff