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1707 lines
40 KiB
1707 lines
40 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// |
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// ALSA SoC Audio Layer - Samsung I2S Controller driver |
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// |
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// Copyright (c) 2010 Samsung Electronics Co. Ltd. |
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// Jaswinder Singh <[email protected]> |
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#include <dt-bindings/sound/samsung-i2s.h> |
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#include <linux/delay.h> |
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#include <linux/slab.h> |
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#include <linux/clk.h> |
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#include <linux/clk-provider.h> |
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#include <linux/io.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/of_device.h> |
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#include <linux/of_gpio.h> |
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#include <linux/pm_runtime.h> |
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#include <sound/soc.h> |
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#include <sound/pcm_params.h> |
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#include <linux/platform_data/asoc-s3c.h> |
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#include "dma.h" |
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#include "idma.h" |
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#include "i2s.h" |
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#include "i2s-regs.h" |
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#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t) |
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#define SAMSUNG_I2S_ID_PRIMARY 1 |
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#define SAMSUNG_I2S_ID_SECONDARY 2 |
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struct samsung_i2s_variant_regs { |
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unsigned int bfs_off; |
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unsigned int rfs_off; |
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unsigned int sdf_off; |
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unsigned int txr_off; |
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unsigned int rclksrc_off; |
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unsigned int mss_off; |
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unsigned int cdclkcon_off; |
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unsigned int lrp_off; |
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unsigned int bfs_mask; |
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unsigned int rfs_mask; |
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unsigned int ftx0cnt_off; |
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}; |
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struct samsung_i2s_dai_data { |
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u32 quirks; |
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unsigned int pcm_rates; |
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const struct samsung_i2s_variant_regs *i2s_variant_regs; |
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}; |
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struct i2s_dai { |
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/* Platform device for this DAI */ |
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struct platform_device *pdev; |
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/* Frame clock */ |
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unsigned frmclk; |
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/* |
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* Specifically requested RCLK, BCLK by machine driver. |
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* 0 indicates CPU driver is free to choose any value. |
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*/ |
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unsigned rfs, bfs; |
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/* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */ |
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struct i2s_dai *pri_dai; |
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/* Pointer to the Secondary_Fifo if it has one, NULL otherwise */ |
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struct i2s_dai *sec_dai; |
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#define DAI_OPENED (1 << 0) /* DAI is opened */ |
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#define DAI_MANAGER (1 << 1) /* DAI is the manager */ |
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unsigned mode; |
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/* Driver for this DAI */ |
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struct snd_soc_dai_driver *drv; |
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/* DMA parameters */ |
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struct snd_dmaengine_dai_dma_data dma_playback; |
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struct snd_dmaengine_dai_dma_data dma_capture; |
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struct snd_dmaengine_dai_dma_data idma_playback; |
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dma_filter_fn filter; |
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struct samsung_i2s_priv *priv; |
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}; |
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struct samsung_i2s_priv { |
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struct platform_device *pdev; |
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struct platform_device *pdev_sec; |
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/* Lock for cross interface checks */ |
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spinlock_t pcm_lock; |
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/* CPU DAIs and their corresponding drivers */ |
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struct i2s_dai *dai; |
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struct snd_soc_dai_driver *dai_drv; |
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int num_dais; |
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/* The I2S controller's core clock */ |
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struct clk *clk; |
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/* Clock for generating I2S signals */ |
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struct clk *op_clk; |
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/* Rate of RCLK source clock */ |
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unsigned long rclk_srcrate; |
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/* Cache of selected I2S registers for system suspend */ |
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u32 suspend_i2smod; |
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u32 suspend_i2scon; |
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u32 suspend_i2spsr; |
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const struct samsung_i2s_variant_regs *variant_regs; |
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u32 quirks; |
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/* The clock provider's data */ |
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struct clk *clk_table[3]; |
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struct clk_onecell_data clk_data; |
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/* Spinlock protecting member fields below */ |
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spinlock_t lock; |
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/* Memory mapped SFR region */ |
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void __iomem *addr; |
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/* A flag indicating the I2S slave mode operation */ |
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bool slave_mode; |
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}; |
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/* Returns true if this is the 'overlay' stereo DAI */ |
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static inline bool is_secondary(struct i2s_dai *i2s) |
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{ |
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return i2s->drv->id == SAMSUNG_I2S_ID_SECONDARY; |
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} |
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/* If this interface of the controller is transmitting data */ |
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static inline bool tx_active(struct i2s_dai *i2s) |
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{ |
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u32 active; |
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if (!i2s) |
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return false; |
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active = readl(i2s->priv->addr + I2SCON); |
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if (is_secondary(i2s)) |
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active &= CON_TXSDMA_ACTIVE; |
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else |
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active &= CON_TXDMA_ACTIVE; |
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return active ? true : false; |
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} |
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/* Return pointer to the other DAI */ |
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static inline struct i2s_dai *get_other_dai(struct i2s_dai *i2s) |
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{ |
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return i2s->pri_dai ? : i2s->sec_dai; |
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} |
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/* If the other interface of the controller is transmitting data */ |
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static inline bool other_tx_active(struct i2s_dai *i2s) |
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{ |
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struct i2s_dai *other = get_other_dai(i2s); |
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return tx_active(other); |
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} |
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/* If any interface of the controller is transmitting data */ |
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static inline bool any_tx_active(struct i2s_dai *i2s) |
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{ |
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return tx_active(i2s) || other_tx_active(i2s); |
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} |
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/* If this interface of the controller is receiving data */ |
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static inline bool rx_active(struct i2s_dai *i2s) |
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{ |
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u32 active; |
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if (!i2s) |
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return false; |
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active = readl(i2s->priv->addr + I2SCON) & CON_RXDMA_ACTIVE; |
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return active ? true : false; |
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} |
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/* If the other interface of the controller is receiving data */ |
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static inline bool other_rx_active(struct i2s_dai *i2s) |
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{ |
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struct i2s_dai *other = get_other_dai(i2s); |
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return rx_active(other); |
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} |
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/* If any interface of the controller is receiving data */ |
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static inline bool any_rx_active(struct i2s_dai *i2s) |
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{ |
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return rx_active(i2s) || other_rx_active(i2s); |
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} |
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/* If the other DAI is transmitting or receiving data */ |
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static inline bool other_active(struct i2s_dai *i2s) |
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{ |
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return other_rx_active(i2s) || other_tx_active(i2s); |
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} |
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/* If this DAI is transmitting or receiving data */ |
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static inline bool this_active(struct i2s_dai *i2s) |
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{ |
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return tx_active(i2s) || rx_active(i2s); |
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} |
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/* If the controller is active anyway */ |
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static inline bool any_active(struct i2s_dai *i2s) |
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{ |
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return this_active(i2s) || other_active(i2s); |
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} |
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static inline struct i2s_dai *to_info(struct snd_soc_dai *dai) |
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{ |
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struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); |
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return &priv->dai[dai->id - 1]; |
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} |
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static inline bool is_opened(struct i2s_dai *i2s) |
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{ |
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if (i2s && (i2s->mode & DAI_OPENED)) |
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return true; |
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else |
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return false; |
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} |
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static inline bool is_manager(struct i2s_dai *i2s) |
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{ |
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if (is_opened(i2s) && (i2s->mode & DAI_MANAGER)) |
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return true; |
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else |
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return false; |
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} |
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/* Read RCLK of I2S (in multiples of LRCLK) */ |
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static inline unsigned get_rfs(struct i2s_dai *i2s) |
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{ |
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struct samsung_i2s_priv *priv = i2s->priv; |
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u32 rfs; |
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rfs = readl(priv->addr + I2SMOD) >> priv->variant_regs->rfs_off; |
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rfs &= priv->variant_regs->rfs_mask; |
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switch (rfs) { |
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case 7: return 192; |
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case 6: return 96; |
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case 5: return 128; |
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case 4: return 64; |
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case 3: return 768; |
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case 2: return 384; |
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case 1: return 512; |
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default: return 256; |
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} |
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} |
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/* Write RCLK of I2S (in multiples of LRCLK) */ |
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static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs) |
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{ |
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struct samsung_i2s_priv *priv = i2s->priv; |
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u32 mod = readl(priv->addr + I2SMOD); |
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int rfs_shift = priv->variant_regs->rfs_off; |
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mod &= ~(priv->variant_regs->rfs_mask << rfs_shift); |
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switch (rfs) { |
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case 192: |
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mod |= (EXYNOS7_MOD_RCLK_192FS << rfs_shift); |
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break; |
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case 96: |
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mod |= (EXYNOS7_MOD_RCLK_96FS << rfs_shift); |
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break; |
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case 128: |
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mod |= (EXYNOS7_MOD_RCLK_128FS << rfs_shift); |
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break; |
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case 64: |
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mod |= (EXYNOS7_MOD_RCLK_64FS << rfs_shift); |
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break; |
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case 768: |
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mod |= (MOD_RCLK_768FS << rfs_shift); |
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break; |
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case 512: |
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mod |= (MOD_RCLK_512FS << rfs_shift); |
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break; |
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case 384: |
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mod |= (MOD_RCLK_384FS << rfs_shift); |
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break; |
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default: |
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mod |= (MOD_RCLK_256FS << rfs_shift); |
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break; |
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} |
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writel(mod, priv->addr + I2SMOD); |
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} |
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/* Read bit-clock of I2S (in multiples of LRCLK) */ |
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static inline unsigned get_bfs(struct i2s_dai *i2s) |
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{ |
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struct samsung_i2s_priv *priv = i2s->priv; |
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u32 bfs; |
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bfs = readl(priv->addr + I2SMOD) >> priv->variant_regs->bfs_off; |
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bfs &= priv->variant_regs->bfs_mask; |
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switch (bfs) { |
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case 8: return 256; |
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case 7: return 192; |
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case 6: return 128; |
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case 5: return 96; |
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case 4: return 64; |
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case 3: return 24; |
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case 2: return 16; |
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case 1: return 48; |
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default: return 32; |
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} |
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} |
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/* Write bit-clock of I2S (in multiples of LRCLK) */ |
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static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs) |
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{ |
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struct samsung_i2s_priv *priv = i2s->priv; |
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u32 mod = readl(priv->addr + I2SMOD); |
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int tdm = priv->quirks & QUIRK_SUPPORTS_TDM; |
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int bfs_shift = priv->variant_regs->bfs_off; |
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/* Non-TDM I2S controllers do not support BCLK > 48 * FS */ |
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if (!tdm && bfs > 48) { |
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dev_err(&i2s->pdev->dev, "Unsupported BCLK divider\n"); |
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return; |
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} |
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mod &= ~(priv->variant_regs->bfs_mask << bfs_shift); |
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switch (bfs) { |
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case 48: |
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mod |= (MOD_BCLK_48FS << bfs_shift); |
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break; |
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case 32: |
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mod |= (MOD_BCLK_32FS << bfs_shift); |
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break; |
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case 24: |
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mod |= (MOD_BCLK_24FS << bfs_shift); |
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break; |
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case 16: |
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mod |= (MOD_BCLK_16FS << bfs_shift); |
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break; |
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case 64: |
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mod |= (EXYNOS5420_MOD_BCLK_64FS << bfs_shift); |
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break; |
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case 96: |
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mod |= (EXYNOS5420_MOD_BCLK_96FS << bfs_shift); |
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break; |
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case 128: |
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mod |= (EXYNOS5420_MOD_BCLK_128FS << bfs_shift); |
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break; |
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case 192: |
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mod |= (EXYNOS5420_MOD_BCLK_192FS << bfs_shift); |
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break; |
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case 256: |
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mod |= (EXYNOS5420_MOD_BCLK_256FS << bfs_shift); |
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break; |
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default: |
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dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n"); |
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return; |
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} |
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writel(mod, priv->addr + I2SMOD); |
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} |
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/* Sample size */ |
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static inline int get_blc(struct i2s_dai *i2s) |
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{ |
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int blc = readl(i2s->priv->addr + I2SMOD); |
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blc = (blc >> 13) & 0x3; |
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switch (blc) { |
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case 2: return 24; |
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case 1: return 8; |
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default: return 16; |
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} |
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} |
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/* TX channel control */ |
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static void i2s_txctrl(struct i2s_dai *i2s, int on) |
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{ |
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struct samsung_i2s_priv *priv = i2s->priv; |
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void __iomem *addr = priv->addr; |
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int txr_off = priv->variant_regs->txr_off; |
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u32 con = readl(addr + I2SCON); |
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u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off); |
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if (on) { |
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con |= CON_ACTIVE; |
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con &= ~CON_TXCH_PAUSE; |
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if (is_secondary(i2s)) { |
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con |= CON_TXSDMA_ACTIVE; |
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con &= ~CON_TXSDMA_PAUSE; |
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} else { |
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con |= CON_TXDMA_ACTIVE; |
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con &= ~CON_TXDMA_PAUSE; |
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} |
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if (any_rx_active(i2s)) |
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mod |= 2 << txr_off; |
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else |
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mod |= 0 << txr_off; |
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} else { |
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if (is_secondary(i2s)) { |
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con |= CON_TXSDMA_PAUSE; |
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con &= ~CON_TXSDMA_ACTIVE; |
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} else { |
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con |= CON_TXDMA_PAUSE; |
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con &= ~CON_TXDMA_ACTIVE; |
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} |
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if (other_tx_active(i2s)) { |
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writel(con, addr + I2SCON); |
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return; |
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} |
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con |= CON_TXCH_PAUSE; |
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if (any_rx_active(i2s)) |
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mod |= 1 << txr_off; |
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else |
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con &= ~CON_ACTIVE; |
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} |
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writel(mod, addr + I2SMOD); |
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writel(con, addr + I2SCON); |
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} |
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/* RX Channel Control */ |
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static void i2s_rxctrl(struct i2s_dai *i2s, int on) |
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{ |
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struct samsung_i2s_priv *priv = i2s->priv; |
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void __iomem *addr = priv->addr; |
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int txr_off = priv->variant_regs->txr_off; |
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u32 con = readl(addr + I2SCON); |
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u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off); |
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if (on) { |
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con |= CON_RXDMA_ACTIVE | CON_ACTIVE; |
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con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE); |
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|
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if (any_tx_active(i2s)) |
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mod |= 2 << txr_off; |
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else |
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mod |= 1 << txr_off; |
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} else { |
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con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE; |
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con &= ~CON_RXDMA_ACTIVE; |
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|
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if (any_tx_active(i2s)) |
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mod |= 0 << txr_off; |
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else |
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con &= ~CON_ACTIVE; |
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} |
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writel(mod, addr + I2SMOD); |
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writel(con, addr + I2SCON); |
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} |
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|
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/* Flush FIFO of an interface */ |
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static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush) |
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{ |
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void __iomem *fic; |
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u32 val; |
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|
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if (!i2s) |
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return; |
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|
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if (is_secondary(i2s)) |
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fic = i2s->priv->addr + I2SFICS; |
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else |
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fic = i2s->priv->addr + I2SFIC; |
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|
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/* Flush the FIFO */ |
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writel(readl(fic) | flush, fic); |
|
|
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/* Be patient */ |
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val = msecs_to_loops(1) / 1000; /* 1 usec */ |
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while (--val) |
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cpu_relax(); |
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|
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writel(readl(fic) & ~flush, fic); |
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} |
|
|
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static int i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id, unsigned int rfs, |
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int dir) |
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{ |
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struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); |
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struct i2s_dai *i2s = to_info(dai); |
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struct i2s_dai *other = get_other_dai(i2s); |
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const struct samsung_i2s_variant_regs *i2s_regs = priv->variant_regs; |
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unsigned int cdcon_mask = 1 << i2s_regs->cdclkcon_off; |
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unsigned int rsrc_mask = 1 << i2s_regs->rclksrc_off; |
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u32 mod, mask, val = 0; |
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unsigned long flags; |
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int ret = 0; |
|
|
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pm_runtime_get_sync(dai->dev); |
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|
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spin_lock_irqsave(&priv->lock, flags); |
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mod = readl(priv->addr + I2SMOD); |
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spin_unlock_irqrestore(&priv->lock, flags); |
|
|
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switch (clk_id) { |
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case SAMSUNG_I2S_OPCLK: |
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mask = MOD_OPCLK_MASK; |
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val = (dir << MOD_OPCLK_SHIFT) & MOD_OPCLK_MASK; |
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break; |
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case SAMSUNG_I2S_CDCLK: |
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mask = 1 << i2s_regs->cdclkcon_off; |
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/* Shouldn't matter in GATING(CLOCK_IN) mode */ |
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if (dir == SND_SOC_CLOCK_IN) |
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rfs = 0; |
|
|
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if ((rfs && other && other->rfs && (other->rfs != rfs)) || |
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(any_active(i2s) && |
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(((dir == SND_SOC_CLOCK_IN) |
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&& !(mod & cdcon_mask)) || |
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((dir == SND_SOC_CLOCK_OUT) |
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&& (mod & cdcon_mask))))) { |
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dev_err(&i2s->pdev->dev, |
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"%s:%d Other DAI busy\n", __func__, __LINE__); |
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ret = -EAGAIN; |
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goto err; |
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} |
|
|
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if (dir == SND_SOC_CLOCK_IN) |
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val = 1 << i2s_regs->cdclkcon_off; |
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|
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i2s->rfs = rfs; |
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break; |
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|
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case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */ |
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case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */ |
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mask = 1 << i2s_regs->rclksrc_off; |
|
|
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if ((priv->quirks & QUIRK_NO_MUXPSR) |
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|| (clk_id == SAMSUNG_I2S_RCLKSRC_0)) |
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clk_id = 0; |
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else |
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clk_id = 1; |
|
|
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if (!any_active(i2s)) { |
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if (priv->op_clk && !IS_ERR(priv->op_clk)) { |
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if ((clk_id && !(mod & rsrc_mask)) || |
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(!clk_id && (mod & rsrc_mask))) { |
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clk_disable_unprepare(priv->op_clk); |
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clk_put(priv->op_clk); |
|
} else { |
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priv->rclk_srcrate = |
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clk_get_rate(priv->op_clk); |
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goto done; |
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} |
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} |
|
|
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if (clk_id) |
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priv->op_clk = clk_get(&i2s->pdev->dev, |
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"i2s_opclk1"); |
|
else |
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priv->op_clk = clk_get(&i2s->pdev->dev, |
|
"i2s_opclk0"); |
|
|
|
if (WARN_ON(IS_ERR(priv->op_clk))) { |
|
ret = PTR_ERR(priv->op_clk); |
|
priv->op_clk = NULL; |
|
goto err; |
|
} |
|
|
|
ret = clk_prepare_enable(priv->op_clk); |
|
if (ret) { |
|
clk_put(priv->op_clk); |
|
priv->op_clk = NULL; |
|
goto err; |
|
} |
|
priv->rclk_srcrate = clk_get_rate(priv->op_clk); |
|
|
|
} else if ((!clk_id && (mod & rsrc_mask)) |
|
|| (clk_id && !(mod & rsrc_mask))) { |
|
dev_err(&i2s->pdev->dev, |
|
"%s:%d Other DAI busy\n", __func__, __LINE__); |
|
ret = -EAGAIN; |
|
goto err; |
|
} else { |
|
/* Call can't be on the active DAI */ |
|
goto done; |
|
} |
|
|
|
if (clk_id == 1) |
|
val = 1 << i2s_regs->rclksrc_off; |
|
break; |
|
default: |
|
dev_err(&i2s->pdev->dev, "We don't serve that!\n"); |
|
ret = -EINVAL; |
|
goto err; |
|
} |
|
|
|
spin_lock_irqsave(&priv->lock, flags); |
|
mod = readl(priv->addr + I2SMOD); |
|
mod = (mod & ~mask) | val; |
|
writel(mod, priv->addr + I2SMOD); |
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
done: |
|
pm_runtime_put(dai->dev); |
|
|
|
return 0; |
|
err: |
|
pm_runtime_put(dai->dev); |
|
return ret; |
|
} |
|
|
|
static int i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) |
|
{ |
|
struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); |
|
struct i2s_dai *i2s = to_info(dai); |
|
int lrp_shift, sdf_shift, sdf_mask, lrp_rlow, mod_slave; |
|
u32 mod, tmp = 0; |
|
unsigned long flags; |
|
|
|
lrp_shift = priv->variant_regs->lrp_off; |
|
sdf_shift = priv->variant_regs->sdf_off; |
|
mod_slave = 1 << priv->variant_regs->mss_off; |
|
|
|
sdf_mask = MOD_SDF_MASK << sdf_shift; |
|
lrp_rlow = MOD_LR_RLOW << lrp_shift; |
|
|
|
/* Format is priority */ |
|
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
|
case SND_SOC_DAIFMT_RIGHT_J: |
|
tmp |= lrp_rlow; |
|
tmp |= (MOD_SDF_MSB << sdf_shift); |
|
break; |
|
case SND_SOC_DAIFMT_LEFT_J: |
|
tmp |= lrp_rlow; |
|
tmp |= (MOD_SDF_LSB << sdf_shift); |
|
break; |
|
case SND_SOC_DAIFMT_I2S: |
|
tmp |= (MOD_SDF_IIS << sdf_shift); |
|
break; |
|
default: |
|
dev_err(&i2s->pdev->dev, "Format not supported\n"); |
|
return -EINVAL; |
|
} |
|
|
|
/* |
|
* INV flag is relative to the FORMAT flag - if set it simply |
|
* flips the polarity specified by the Standard |
|
*/ |
|
switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
|
case SND_SOC_DAIFMT_NB_NF: |
|
break; |
|
case SND_SOC_DAIFMT_NB_IF: |
|
if (tmp & lrp_rlow) |
|
tmp &= ~lrp_rlow; |
|
else |
|
tmp |= lrp_rlow; |
|
break; |
|
default: |
|
dev_err(&i2s->pdev->dev, "Polarity not supported\n"); |
|
return -EINVAL; |
|
} |
|
|
|
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
|
case SND_SOC_DAIFMT_CBM_CFM: |
|
tmp |= mod_slave; |
|
break; |
|
case SND_SOC_DAIFMT_CBS_CFS: |
|
/* |
|
* Set default source clock in Master mode, only when the |
|
* CLK_I2S_RCLK_SRC clock is not exposed so we ensure any |
|
* clock configuration assigned in DT is not overwritten. |
|
*/ |
|
if (priv->rclk_srcrate == 0 && priv->clk_data.clks == NULL) |
|
i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0, |
|
0, SND_SOC_CLOCK_IN); |
|
break; |
|
default: |
|
dev_err(&i2s->pdev->dev, "master/slave format not supported\n"); |
|
return -EINVAL; |
|
} |
|
|
|
pm_runtime_get_sync(dai->dev); |
|
spin_lock_irqsave(&priv->lock, flags); |
|
mod = readl(priv->addr + I2SMOD); |
|
/* |
|
* Don't change the I2S mode if any controller is active on this |
|
* channel. |
|
*/ |
|
if (any_active(i2s) && |
|
((mod & (sdf_mask | lrp_rlow | mod_slave)) != tmp)) { |
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
pm_runtime_put(dai->dev); |
|
dev_err(&i2s->pdev->dev, |
|
"%s:%d Other DAI busy\n", __func__, __LINE__); |
|
return -EAGAIN; |
|
} |
|
|
|
mod &= ~(sdf_mask | lrp_rlow | mod_slave); |
|
mod |= tmp; |
|
writel(mod, priv->addr + I2SMOD); |
|
priv->slave_mode = (mod & mod_slave); |
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
pm_runtime_put(dai->dev); |
|
|
|
return 0; |
|
} |
|
|
|
static int i2s_hw_params(struct snd_pcm_substream *substream, |
|
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) |
|
{ |
|
struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); |
|
struct i2s_dai *i2s = to_info(dai); |
|
u32 mod, mask = 0, val = 0; |
|
struct clk *rclksrc; |
|
unsigned long flags; |
|
|
|
WARN_ON(!pm_runtime_active(dai->dev)); |
|
|
|
if (!is_secondary(i2s)) |
|
mask |= (MOD_DC2_EN | MOD_DC1_EN); |
|
|
|
switch (params_channels(params)) { |
|
case 6: |
|
val |= MOD_DC2_EN; |
|
fallthrough; |
|
case 4: |
|
val |= MOD_DC1_EN; |
|
break; |
|
case 2: |
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
|
i2s->dma_playback.addr_width = 4; |
|
else |
|
i2s->dma_capture.addr_width = 4; |
|
break; |
|
case 1: |
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
|
i2s->dma_playback.addr_width = 2; |
|
else |
|
i2s->dma_capture.addr_width = 2; |
|
|
|
break; |
|
default: |
|
dev_err(&i2s->pdev->dev, "%d channels not supported\n", |
|
params_channels(params)); |
|
return -EINVAL; |
|
} |
|
|
|
if (is_secondary(i2s)) |
|
mask |= MOD_BLCS_MASK; |
|
else |
|
mask |= MOD_BLCP_MASK; |
|
|
|
if (is_manager(i2s)) |
|
mask |= MOD_BLC_MASK; |
|
|
|
switch (params_width(params)) { |
|
case 8: |
|
if (is_secondary(i2s)) |
|
val |= MOD_BLCS_8BIT; |
|
else |
|
val |= MOD_BLCP_8BIT; |
|
if (is_manager(i2s)) |
|
val |= MOD_BLC_8BIT; |
|
break; |
|
case 16: |
|
if (is_secondary(i2s)) |
|
val |= MOD_BLCS_16BIT; |
|
else |
|
val |= MOD_BLCP_16BIT; |
|
if (is_manager(i2s)) |
|
val |= MOD_BLC_16BIT; |
|
break; |
|
case 24: |
|
if (is_secondary(i2s)) |
|
val |= MOD_BLCS_24BIT; |
|
else |
|
val |= MOD_BLCP_24BIT; |
|
if (is_manager(i2s)) |
|
val |= MOD_BLC_24BIT; |
|
break; |
|
default: |
|
dev_err(&i2s->pdev->dev, "Format(%d) not supported\n", |
|
params_format(params)); |
|
return -EINVAL; |
|
} |
|
|
|
spin_lock_irqsave(&priv->lock, flags); |
|
mod = readl(priv->addr + I2SMOD); |
|
mod = (mod & ~mask) | val; |
|
writel(mod, priv->addr + I2SMOD); |
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
|
|
snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture); |
|
|
|
i2s->frmclk = params_rate(params); |
|
|
|
rclksrc = priv->clk_table[CLK_I2S_RCLK_SRC]; |
|
if (rclksrc && !IS_ERR(rclksrc)) |
|
priv->rclk_srcrate = clk_get_rate(rclksrc); |
|
|
|
return 0; |
|
} |
|
|
|
/* We set constraints on the substream according to the version of I2S */ |
|
static int i2s_startup(struct snd_pcm_substream *substream, |
|
struct snd_soc_dai *dai) |
|
{ |
|
struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); |
|
struct i2s_dai *i2s = to_info(dai); |
|
struct i2s_dai *other = get_other_dai(i2s); |
|
unsigned long flags; |
|
|
|
pm_runtime_get_sync(dai->dev); |
|
|
|
spin_lock_irqsave(&priv->pcm_lock, flags); |
|
|
|
i2s->mode |= DAI_OPENED; |
|
|
|
if (is_manager(other)) |
|
i2s->mode &= ~DAI_MANAGER; |
|
else |
|
i2s->mode |= DAI_MANAGER; |
|
|
|
if (!any_active(i2s) && (priv->quirks & QUIRK_NEED_RSTCLR)) |
|
writel(CON_RSTCLR, i2s->priv->addr + I2SCON); |
|
|
|
spin_unlock_irqrestore(&priv->pcm_lock, flags); |
|
|
|
return 0; |
|
} |
|
|
|
static void i2s_shutdown(struct snd_pcm_substream *substream, |
|
struct snd_soc_dai *dai) |
|
{ |
|
struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); |
|
struct i2s_dai *i2s = to_info(dai); |
|
struct i2s_dai *other = get_other_dai(i2s); |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&priv->pcm_lock, flags); |
|
|
|
i2s->mode &= ~DAI_OPENED; |
|
i2s->mode &= ~DAI_MANAGER; |
|
|
|
if (is_opened(other)) |
|
other->mode |= DAI_MANAGER; |
|
|
|
/* Reset any constraint on RFS and BFS */ |
|
i2s->rfs = 0; |
|
i2s->bfs = 0; |
|
|
|
spin_unlock_irqrestore(&priv->pcm_lock, flags); |
|
|
|
pm_runtime_put(dai->dev); |
|
} |
|
|
|
static int config_setup(struct i2s_dai *i2s) |
|
{ |
|
struct samsung_i2s_priv *priv = i2s->priv; |
|
struct i2s_dai *other = get_other_dai(i2s); |
|
unsigned rfs, bfs, blc; |
|
u32 psr; |
|
|
|
blc = get_blc(i2s); |
|
|
|
bfs = i2s->bfs; |
|
|
|
if (!bfs && other) |
|
bfs = other->bfs; |
|
|
|
/* Select least possible multiple(2) if no constraint set */ |
|
if (!bfs) |
|
bfs = blc * 2; |
|
|
|
rfs = i2s->rfs; |
|
|
|
if (!rfs && other) |
|
rfs = other->rfs; |
|
|
|
if ((rfs == 256 || rfs == 512) && (blc == 24)) { |
|
dev_err(&i2s->pdev->dev, |
|
"%d-RFS not supported for 24-blc\n", rfs); |
|
return -EINVAL; |
|
} |
|
|
|
if (!rfs) { |
|
if (bfs == 16 || bfs == 32) |
|
rfs = 256; |
|
else |
|
rfs = 384; |
|
} |
|
|
|
/* If already setup and running */ |
|
if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) { |
|
dev_err(&i2s->pdev->dev, |
|
"%s:%d Other DAI busy\n", __func__, __LINE__); |
|
return -EAGAIN; |
|
} |
|
|
|
set_bfs(i2s, bfs); |
|
set_rfs(i2s, rfs); |
|
|
|
/* Don't bother with PSR in Slave mode */ |
|
if (priv->slave_mode) |
|
return 0; |
|
|
|
if (!(priv->quirks & QUIRK_NO_MUXPSR)) { |
|
psr = priv->rclk_srcrate / i2s->frmclk / rfs; |
|
writel(((psr - 1) << 8) | PSR_PSREN, priv->addr + I2SPSR); |
|
dev_dbg(&i2s->pdev->dev, |
|
"RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n", |
|
priv->rclk_srcrate, psr, rfs, bfs); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int i2s_trigger(struct snd_pcm_substream *substream, |
|
int cmd, struct snd_soc_dai *dai) |
|
{ |
|
struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); |
|
int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); |
|
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); |
|
struct i2s_dai *i2s = to_info(asoc_rtd_to_cpu(rtd, 0)); |
|
unsigned long flags; |
|
|
|
switch (cmd) { |
|
case SNDRV_PCM_TRIGGER_START: |
|
case SNDRV_PCM_TRIGGER_RESUME: |
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
|
pm_runtime_get_sync(dai->dev); |
|
spin_lock_irqsave(&priv->lock, flags); |
|
|
|
if (config_setup(i2s)) { |
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
return -EINVAL; |
|
} |
|
|
|
if (capture) |
|
i2s_rxctrl(i2s, 1); |
|
else |
|
i2s_txctrl(i2s, 1); |
|
|
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
break; |
|
case SNDRV_PCM_TRIGGER_STOP: |
|
case SNDRV_PCM_TRIGGER_SUSPEND: |
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
|
spin_lock_irqsave(&priv->lock, flags); |
|
|
|
if (capture) { |
|
i2s_rxctrl(i2s, 0); |
|
i2s_fifo(i2s, FIC_RXFLUSH); |
|
} else { |
|
i2s_txctrl(i2s, 0); |
|
i2s_fifo(i2s, FIC_TXFLUSH); |
|
} |
|
|
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
pm_runtime_put(dai->dev); |
|
break; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int i2s_set_clkdiv(struct snd_soc_dai *dai, |
|
int div_id, int div) |
|
{ |
|
struct i2s_dai *i2s = to_info(dai); |
|
struct i2s_dai *other = get_other_dai(i2s); |
|
|
|
switch (div_id) { |
|
case SAMSUNG_I2S_DIV_BCLK: |
|
pm_runtime_get_sync(dai->dev); |
|
if ((any_active(i2s) && div && (get_bfs(i2s) != div)) |
|
|| (other && other->bfs && (other->bfs != div))) { |
|
pm_runtime_put(dai->dev); |
|
dev_err(&i2s->pdev->dev, |
|
"%s:%d Other DAI busy\n", __func__, __LINE__); |
|
return -EAGAIN; |
|
} |
|
i2s->bfs = div; |
|
pm_runtime_put(dai->dev); |
|
break; |
|
default: |
|
dev_err(&i2s->pdev->dev, |
|
"Invalid clock divider(%d)\n", div_id); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static snd_pcm_sframes_t |
|
i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) |
|
{ |
|
struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); |
|
struct i2s_dai *i2s = to_info(dai); |
|
u32 reg = readl(priv->addr + I2SFIC); |
|
snd_pcm_sframes_t delay; |
|
|
|
WARN_ON(!pm_runtime_active(dai->dev)); |
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
|
delay = FIC_RXCOUNT(reg); |
|
else if (is_secondary(i2s)) |
|
delay = FICS_TXCOUNT(readl(priv->addr + I2SFICS)); |
|
else |
|
delay = (reg >> priv->variant_regs->ftx0cnt_off) & 0x7f; |
|
|
|
return delay; |
|
} |
|
|
|
#ifdef CONFIG_PM |
|
static int i2s_suspend(struct snd_soc_component *component) |
|
{ |
|
return pm_runtime_force_suspend(component->dev); |
|
} |
|
|
|
static int i2s_resume(struct snd_soc_component *component) |
|
{ |
|
return pm_runtime_force_resume(component->dev); |
|
} |
|
#else |
|
#define i2s_suspend NULL |
|
#define i2s_resume NULL |
|
#endif |
|
|
|
static int samsung_i2s_dai_probe(struct snd_soc_dai *dai) |
|
{ |
|
struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); |
|
struct i2s_dai *i2s = to_info(dai); |
|
struct i2s_dai *other = get_other_dai(i2s); |
|
unsigned long flags; |
|
|
|
pm_runtime_get_sync(dai->dev); |
|
|
|
if (is_secondary(i2s)) { |
|
/* If this is probe on the secondary DAI */ |
|
snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, NULL); |
|
} else { |
|
snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, |
|
&i2s->dma_capture); |
|
|
|
if (priv->quirks & QUIRK_NEED_RSTCLR) |
|
writel(CON_RSTCLR, priv->addr + I2SCON); |
|
|
|
if (priv->quirks & QUIRK_SUPPORTS_IDMA) |
|
idma_reg_addr_init(priv->addr, |
|
other->idma_playback.addr); |
|
} |
|
|
|
/* Reset any constraint on RFS and BFS */ |
|
i2s->rfs = 0; |
|
i2s->bfs = 0; |
|
|
|
spin_lock_irqsave(&priv->lock, flags); |
|
i2s_txctrl(i2s, 0); |
|
i2s_rxctrl(i2s, 0); |
|
i2s_fifo(i2s, FIC_TXFLUSH); |
|
i2s_fifo(other, FIC_TXFLUSH); |
|
i2s_fifo(i2s, FIC_RXFLUSH); |
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
|
|
/* Gate CDCLK by default */ |
|
if (!is_opened(other)) |
|
i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK, |
|
0, SND_SOC_CLOCK_IN); |
|
pm_runtime_put(dai->dev); |
|
|
|
return 0; |
|
} |
|
|
|
static int samsung_i2s_dai_remove(struct snd_soc_dai *dai) |
|
{ |
|
struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); |
|
struct i2s_dai *i2s = to_info(dai); |
|
unsigned long flags; |
|
|
|
pm_runtime_get_sync(dai->dev); |
|
|
|
if (!is_secondary(i2s)) { |
|
if (priv->quirks & QUIRK_NEED_RSTCLR) { |
|
spin_lock_irqsave(&priv->lock, flags); |
|
writel(0, priv->addr + I2SCON); |
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
} |
|
} |
|
|
|
pm_runtime_put(dai->dev); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct snd_soc_dai_ops samsung_i2s_dai_ops = { |
|
.trigger = i2s_trigger, |
|
.hw_params = i2s_hw_params, |
|
.set_fmt = i2s_set_fmt, |
|
.set_clkdiv = i2s_set_clkdiv, |
|
.set_sysclk = i2s_set_sysclk, |
|
.startup = i2s_startup, |
|
.shutdown = i2s_shutdown, |
|
.delay = i2s_delay, |
|
}; |
|
|
|
static const struct snd_soc_dapm_widget samsung_i2s_widgets[] = { |
|
/* Backend DAI */ |
|
SND_SOC_DAPM_AIF_OUT("Mixer DAI TX", NULL, 0, SND_SOC_NOPM, 0, 0), |
|
SND_SOC_DAPM_AIF_IN("Mixer DAI RX", NULL, 0, SND_SOC_NOPM, 0, 0), |
|
|
|
/* Playback Mixer */ |
|
SND_SOC_DAPM_MIXER("Playback Mixer", SND_SOC_NOPM, 0, 0, NULL, 0), |
|
}; |
|
|
|
static const struct snd_soc_dapm_route samsung_i2s_dapm_routes[] = { |
|
{ "Playback Mixer", NULL, "Primary Playback" }, |
|
{ "Playback Mixer", NULL, "Secondary Playback" }, |
|
|
|
{ "Mixer DAI TX", NULL, "Playback Mixer" }, |
|
{ "Primary Capture", NULL, "Mixer DAI RX" }, |
|
}; |
|
|
|
static const struct snd_soc_component_driver samsung_i2s_component = { |
|
.name = "samsung-i2s", |
|
|
|
.dapm_widgets = samsung_i2s_widgets, |
|
.num_dapm_widgets = ARRAY_SIZE(samsung_i2s_widgets), |
|
|
|
.dapm_routes = samsung_i2s_dapm_routes, |
|
.num_dapm_routes = ARRAY_SIZE(samsung_i2s_dapm_routes), |
|
|
|
.suspend = i2s_suspend, |
|
.resume = i2s_resume, |
|
}; |
|
|
|
#define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \ |
|
SNDRV_PCM_FMTBIT_S24_LE) |
|
|
|
static int i2s_alloc_dais(struct samsung_i2s_priv *priv, |
|
const struct samsung_i2s_dai_data *i2s_dai_data, |
|
int num_dais) |
|
{ |
|
static const char *dai_names[] = { "samsung-i2s", "samsung-i2s-sec" }; |
|
static const char *stream_names[] = { "Primary Playback", |
|
"Secondary Playback" }; |
|
struct snd_soc_dai_driver *dai_drv; |
|
struct i2s_dai *dai; |
|
int i; |
|
|
|
priv->dai = devm_kcalloc(&priv->pdev->dev, num_dais, |
|
sizeof(*dai), GFP_KERNEL); |
|
if (!priv->dai) |
|
return -ENOMEM; |
|
|
|
priv->dai_drv = devm_kcalloc(&priv->pdev->dev, num_dais, |
|
sizeof(*dai_drv), GFP_KERNEL); |
|
if (!priv->dai_drv) |
|
return -ENOMEM; |
|
|
|
for (i = 0; i < num_dais; i++) { |
|
dai_drv = &priv->dai_drv[i]; |
|
|
|
dai_drv->probe = samsung_i2s_dai_probe; |
|
dai_drv->remove = samsung_i2s_dai_remove; |
|
|
|
dai_drv->symmetric_rate = 1; |
|
dai_drv->ops = &samsung_i2s_dai_ops; |
|
|
|
dai_drv->playback.channels_min = 1; |
|
dai_drv->playback.channels_max = 2; |
|
dai_drv->playback.rates = i2s_dai_data->pcm_rates; |
|
dai_drv->playback.formats = SAMSUNG_I2S_FMTS; |
|
dai_drv->playback.stream_name = stream_names[i]; |
|
|
|
dai_drv->id = i + 1; |
|
dai_drv->name = dai_names[i]; |
|
|
|
priv->dai[i].drv = &priv->dai_drv[i]; |
|
priv->dai[i].pdev = priv->pdev; |
|
} |
|
|
|
/* Initialize capture only for the primary DAI */ |
|
dai_drv = &priv->dai_drv[SAMSUNG_I2S_ID_PRIMARY - 1]; |
|
|
|
dai_drv->capture.channels_min = 1; |
|
dai_drv->capture.channels_max = 2; |
|
dai_drv->capture.rates = i2s_dai_data->pcm_rates; |
|
dai_drv->capture.formats = SAMSUNG_I2S_FMTS; |
|
dai_drv->capture.stream_name = "Primary Capture"; |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_PM |
|
static int i2s_runtime_suspend(struct device *dev) |
|
{ |
|
struct samsung_i2s_priv *priv = dev_get_drvdata(dev); |
|
|
|
priv->suspend_i2smod = readl(priv->addr + I2SMOD); |
|
priv->suspend_i2scon = readl(priv->addr + I2SCON); |
|
priv->suspend_i2spsr = readl(priv->addr + I2SPSR); |
|
|
|
clk_disable_unprepare(priv->op_clk); |
|
clk_disable_unprepare(priv->clk); |
|
|
|
return 0; |
|
} |
|
|
|
static int i2s_runtime_resume(struct device *dev) |
|
{ |
|
struct samsung_i2s_priv *priv = dev_get_drvdata(dev); |
|
int ret; |
|
|
|
ret = clk_prepare_enable(priv->clk); |
|
if (ret) |
|
return ret; |
|
|
|
if (priv->op_clk) { |
|
ret = clk_prepare_enable(priv->op_clk); |
|
if (ret) { |
|
clk_disable_unprepare(priv->clk); |
|
return ret; |
|
} |
|
} |
|
|
|
writel(priv->suspend_i2scon, priv->addr + I2SCON); |
|
writel(priv->suspend_i2smod, priv->addr + I2SMOD); |
|
writel(priv->suspend_i2spsr, priv->addr + I2SPSR); |
|
|
|
return 0; |
|
} |
|
#endif /* CONFIG_PM */ |
|
|
|
static void i2s_unregister_clocks(struct samsung_i2s_priv *priv) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < priv->clk_data.clk_num; i++) { |
|
if (!IS_ERR(priv->clk_table[i])) |
|
clk_unregister(priv->clk_table[i]); |
|
} |
|
} |
|
|
|
static void i2s_unregister_clock_provider(struct samsung_i2s_priv *priv) |
|
{ |
|
of_clk_del_provider(priv->pdev->dev.of_node); |
|
i2s_unregister_clocks(priv); |
|
} |
|
|
|
|
|
static int i2s_register_clock_provider(struct samsung_i2s_priv *priv) |
|
{ |
|
|
|
const char * const i2s_clk_desc[] = { "cdclk", "rclk_src", "prescaler" }; |
|
const char *clk_name[2] = { "i2s_opclk0", "i2s_opclk1" }; |
|
const char *p_names[2] = { NULL }; |
|
struct device *dev = &priv->pdev->dev; |
|
const struct samsung_i2s_variant_regs *reg_info = priv->variant_regs; |
|
const char *i2s_clk_name[ARRAY_SIZE(i2s_clk_desc)]; |
|
struct clk *rclksrc; |
|
int ret, i; |
|
|
|
/* Register the clock provider only if it's expected in the DTB */ |
|
if (!of_find_property(dev->of_node, "#clock-cells", NULL)) |
|
return 0; |
|
|
|
/* Get the RCLKSRC mux clock parent clock names */ |
|
for (i = 0; i < ARRAY_SIZE(p_names); i++) { |
|
rclksrc = clk_get(dev, clk_name[i]); |
|
if (IS_ERR(rclksrc)) |
|
continue; |
|
p_names[i] = __clk_get_name(rclksrc); |
|
clk_put(rclksrc); |
|
} |
|
|
|
for (i = 0; i < ARRAY_SIZE(i2s_clk_desc); i++) { |
|
i2s_clk_name[i] = devm_kasprintf(dev, GFP_KERNEL, "%s_%s", |
|
dev_name(dev), i2s_clk_desc[i]); |
|
if (!i2s_clk_name[i]) |
|
return -ENOMEM; |
|
} |
|
|
|
if (!(priv->quirks & QUIRK_NO_MUXPSR)) { |
|
/* Activate the prescaler */ |
|
u32 val = readl(priv->addr + I2SPSR); |
|
writel(val | PSR_PSREN, priv->addr + I2SPSR); |
|
|
|
priv->clk_table[CLK_I2S_RCLK_SRC] = clk_register_mux(dev, |
|
i2s_clk_name[CLK_I2S_RCLK_SRC], p_names, |
|
ARRAY_SIZE(p_names), |
|
CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT, |
|
priv->addr + I2SMOD, reg_info->rclksrc_off, |
|
1, 0, &priv->lock); |
|
|
|
priv->clk_table[CLK_I2S_RCLK_PSR] = clk_register_divider(dev, |
|
i2s_clk_name[CLK_I2S_RCLK_PSR], |
|
i2s_clk_name[CLK_I2S_RCLK_SRC], |
|
CLK_SET_RATE_PARENT, |
|
priv->addr + I2SPSR, 8, 6, 0, &priv->lock); |
|
|
|
p_names[0] = i2s_clk_name[CLK_I2S_RCLK_PSR]; |
|
priv->clk_data.clk_num = 2; |
|
} |
|
|
|
priv->clk_table[CLK_I2S_CDCLK] = clk_register_gate(dev, |
|
i2s_clk_name[CLK_I2S_CDCLK], p_names[0], |
|
CLK_SET_RATE_PARENT, |
|
priv->addr + I2SMOD, reg_info->cdclkcon_off, |
|
CLK_GATE_SET_TO_DISABLE, &priv->lock); |
|
|
|
priv->clk_data.clk_num += 1; |
|
priv->clk_data.clks = priv->clk_table; |
|
|
|
ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get, |
|
&priv->clk_data); |
|
if (ret < 0) { |
|
dev_err(dev, "failed to add clock provider: %d\n", ret); |
|
i2s_unregister_clocks(priv); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
/* Create platform device for the secondary PCM */ |
|
static int i2s_create_secondary_device(struct samsung_i2s_priv *priv) |
|
{ |
|
struct platform_device *pdev_sec; |
|
const char *devname; |
|
int ret; |
|
|
|
devname = devm_kasprintf(&priv->pdev->dev, GFP_KERNEL, "%s-sec", |
|
dev_name(&priv->pdev->dev)); |
|
if (!devname) |
|
return -ENOMEM; |
|
|
|
pdev_sec = platform_device_alloc(devname, -1); |
|
if (!pdev_sec) |
|
return -ENOMEM; |
|
|
|
pdev_sec->driver_override = kstrdup("samsung-i2s", GFP_KERNEL); |
|
|
|
ret = platform_device_add(pdev_sec); |
|
if (ret < 0) { |
|
platform_device_put(pdev_sec); |
|
return ret; |
|
} |
|
|
|
ret = device_attach(&pdev_sec->dev); |
|
if (ret <= 0) { |
|
platform_device_unregister(priv->pdev_sec); |
|
dev_info(&pdev_sec->dev, "device_attach() failed\n"); |
|
return ret; |
|
} |
|
|
|
priv->pdev_sec = pdev_sec; |
|
|
|
return 0; |
|
} |
|
|
|
static void i2s_delete_secondary_device(struct samsung_i2s_priv *priv) |
|
{ |
|
platform_device_unregister(priv->pdev_sec); |
|
priv->pdev_sec = NULL; |
|
} |
|
|
|
static int samsung_i2s_probe(struct platform_device *pdev) |
|
{ |
|
struct i2s_dai *pri_dai, *sec_dai = NULL; |
|
struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data; |
|
u32 regs_base, idma_addr = 0; |
|
struct device_node *np = pdev->dev.of_node; |
|
const struct samsung_i2s_dai_data *i2s_dai_data; |
|
const struct platform_device_id *id; |
|
struct samsung_i2s_priv *priv; |
|
struct resource *res; |
|
int num_dais, ret; |
|
|
|
if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) { |
|
i2s_dai_data = of_device_get_match_data(&pdev->dev); |
|
} else { |
|
id = platform_get_device_id(pdev); |
|
|
|
/* Nothing to do if it is the secondary device probe */ |
|
if (!id) |
|
return 0; |
|
|
|
i2s_dai_data = (struct samsung_i2s_dai_data *)id->driver_data; |
|
} |
|
|
|
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); |
|
if (!priv) |
|
return -ENOMEM; |
|
|
|
if (np) { |
|
priv->quirks = i2s_dai_data->quirks; |
|
} else { |
|
if (!i2s_pdata) { |
|
dev_err(&pdev->dev, "Missing platform data\n"); |
|
return -EINVAL; |
|
} |
|
priv->quirks = i2s_pdata->type.quirks; |
|
} |
|
|
|
num_dais = (priv->quirks & QUIRK_SEC_DAI) ? 2 : 1; |
|
priv->pdev = pdev; |
|
priv->variant_regs = i2s_dai_data->i2s_variant_regs; |
|
|
|
ret = i2s_alloc_dais(priv, i2s_dai_data, num_dais); |
|
if (ret < 0) |
|
return ret; |
|
|
|
pri_dai = &priv->dai[SAMSUNG_I2S_ID_PRIMARY - 1]; |
|
|
|
spin_lock_init(&priv->lock); |
|
spin_lock_init(&priv->pcm_lock); |
|
|
|
if (!np) { |
|
pri_dai->dma_playback.filter_data = i2s_pdata->dma_playback; |
|
pri_dai->dma_capture.filter_data = i2s_pdata->dma_capture; |
|
pri_dai->filter = i2s_pdata->dma_filter; |
|
|
|
idma_addr = i2s_pdata->type.idma_addr; |
|
} else { |
|
if (of_property_read_u32(np, "samsung,idma-addr", |
|
&idma_addr)) { |
|
if (priv->quirks & QUIRK_SUPPORTS_IDMA) { |
|
dev_info(&pdev->dev, "idma address is not"\ |
|
"specified"); |
|
} |
|
} |
|
} |
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
|
priv->addr = devm_ioremap_resource(&pdev->dev, res); |
|
if (IS_ERR(priv->addr)) |
|
return PTR_ERR(priv->addr); |
|
|
|
regs_base = res->start; |
|
|
|
priv->clk = devm_clk_get(&pdev->dev, "iis"); |
|
if (IS_ERR(priv->clk)) { |
|
dev_err(&pdev->dev, "Failed to get iis clock\n"); |
|
return PTR_ERR(priv->clk); |
|
} |
|
|
|
ret = clk_prepare_enable(priv->clk); |
|
if (ret != 0) { |
|
dev_err(&pdev->dev, "failed to enable clock: %d\n", ret); |
|
return ret; |
|
} |
|
pri_dai->dma_playback.addr = regs_base + I2STXD; |
|
pri_dai->dma_capture.addr = regs_base + I2SRXD; |
|
pri_dai->dma_playback.chan_name = "tx"; |
|
pri_dai->dma_capture.chan_name = "rx"; |
|
pri_dai->dma_playback.addr_width = 4; |
|
pri_dai->dma_capture.addr_width = 4; |
|
pri_dai->priv = priv; |
|
|
|
if (priv->quirks & QUIRK_PRI_6CHAN) |
|
pri_dai->drv->playback.channels_max = 6; |
|
|
|
ret = samsung_asoc_dma_platform_register(&pdev->dev, pri_dai->filter, |
|
"tx", "rx", NULL); |
|
if (ret < 0) |
|
goto err_disable_clk; |
|
|
|
if (priv->quirks & QUIRK_SEC_DAI) { |
|
sec_dai = &priv->dai[SAMSUNG_I2S_ID_SECONDARY - 1]; |
|
|
|
sec_dai->dma_playback.addr = regs_base + I2STXDS; |
|
sec_dai->dma_playback.chan_name = "tx-sec"; |
|
|
|
if (!np) { |
|
sec_dai->dma_playback.filter_data = i2s_pdata->dma_play_sec; |
|
sec_dai->filter = i2s_pdata->dma_filter; |
|
} |
|
|
|
sec_dai->dma_playback.addr_width = 4; |
|
sec_dai->idma_playback.addr = idma_addr; |
|
sec_dai->pri_dai = pri_dai; |
|
sec_dai->priv = priv; |
|
pri_dai->sec_dai = sec_dai; |
|
|
|
ret = i2s_create_secondary_device(priv); |
|
if (ret < 0) |
|
goto err_disable_clk; |
|
|
|
ret = samsung_asoc_dma_platform_register(&priv->pdev_sec->dev, |
|
sec_dai->filter, "tx-sec", NULL, |
|
&pdev->dev); |
|
if (ret < 0) |
|
goto err_del_sec; |
|
|
|
} |
|
|
|
if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) { |
|
dev_err(&pdev->dev, "Unable to configure gpio\n"); |
|
ret = -EINVAL; |
|
goto err_del_sec; |
|
} |
|
|
|
dev_set_drvdata(&pdev->dev, priv); |
|
|
|
ret = devm_snd_soc_register_component(&pdev->dev, |
|
&samsung_i2s_component, |
|
priv->dai_drv, num_dais); |
|
if (ret < 0) |
|
goto err_del_sec; |
|
|
|
pm_runtime_set_active(&pdev->dev); |
|
pm_runtime_enable(&pdev->dev); |
|
|
|
ret = i2s_register_clock_provider(priv); |
|
if (ret < 0) |
|
goto err_disable_pm; |
|
|
|
priv->op_clk = clk_get_parent(priv->clk_table[CLK_I2S_RCLK_SRC]); |
|
|
|
return 0; |
|
|
|
err_disable_pm: |
|
pm_runtime_disable(&pdev->dev); |
|
err_del_sec: |
|
i2s_delete_secondary_device(priv); |
|
err_disable_clk: |
|
clk_disable_unprepare(priv->clk); |
|
return ret; |
|
} |
|
|
|
static int samsung_i2s_remove(struct platform_device *pdev) |
|
{ |
|
struct samsung_i2s_priv *priv = dev_get_drvdata(&pdev->dev); |
|
|
|
/* The secondary device has no driver data assigned */ |
|
if (!priv) |
|
return 0; |
|
|
|
pm_runtime_get_sync(&pdev->dev); |
|
pm_runtime_disable(&pdev->dev); |
|
|
|
i2s_unregister_clock_provider(priv); |
|
i2s_delete_secondary_device(priv); |
|
clk_disable_unprepare(priv->clk); |
|
|
|
pm_runtime_put_noidle(&pdev->dev); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct samsung_i2s_variant_regs i2sv3_regs = { |
|
.bfs_off = 1, |
|
.rfs_off = 3, |
|
.sdf_off = 5, |
|
.txr_off = 8, |
|
.rclksrc_off = 10, |
|
.mss_off = 11, |
|
.cdclkcon_off = 12, |
|
.lrp_off = 7, |
|
.bfs_mask = 0x3, |
|
.rfs_mask = 0x3, |
|
.ftx0cnt_off = 8, |
|
}; |
|
|
|
static const struct samsung_i2s_variant_regs i2sv6_regs = { |
|
.bfs_off = 0, |
|
.rfs_off = 4, |
|
.sdf_off = 6, |
|
.txr_off = 8, |
|
.rclksrc_off = 10, |
|
.mss_off = 11, |
|
.cdclkcon_off = 12, |
|
.lrp_off = 15, |
|
.bfs_mask = 0xf, |
|
.rfs_mask = 0x3, |
|
.ftx0cnt_off = 8, |
|
}; |
|
|
|
static const struct samsung_i2s_variant_regs i2sv7_regs = { |
|
.bfs_off = 0, |
|
.rfs_off = 4, |
|
.sdf_off = 7, |
|
.txr_off = 9, |
|
.rclksrc_off = 11, |
|
.mss_off = 12, |
|
.cdclkcon_off = 22, |
|
.lrp_off = 15, |
|
.bfs_mask = 0xf, |
|
.rfs_mask = 0x7, |
|
.ftx0cnt_off = 0, |
|
}; |
|
|
|
static const struct samsung_i2s_variant_regs i2sv5_i2s1_regs = { |
|
.bfs_off = 0, |
|
.rfs_off = 3, |
|
.sdf_off = 6, |
|
.txr_off = 8, |
|
.rclksrc_off = 10, |
|
.mss_off = 11, |
|
.cdclkcon_off = 12, |
|
.lrp_off = 15, |
|
.bfs_mask = 0x7, |
|
.rfs_mask = 0x7, |
|
.ftx0cnt_off = 8, |
|
}; |
|
|
|
static const struct samsung_i2s_dai_data i2sv3_dai_type = { |
|
.quirks = QUIRK_NO_MUXPSR, |
|
.pcm_rates = SNDRV_PCM_RATE_8000_96000, |
|
.i2s_variant_regs = &i2sv3_regs, |
|
}; |
|
|
|
static const struct samsung_i2s_dai_data i2sv5_dai_type __maybe_unused = { |
|
.quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR | |
|
QUIRK_SUPPORTS_IDMA, |
|
.pcm_rates = SNDRV_PCM_RATE_8000_96000, |
|
.i2s_variant_regs = &i2sv3_regs, |
|
}; |
|
|
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static const struct samsung_i2s_dai_data i2sv6_dai_type __maybe_unused = { |
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.quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR | |
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QUIRK_SUPPORTS_TDM | QUIRK_SUPPORTS_IDMA, |
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.pcm_rates = SNDRV_PCM_RATE_8000_96000, |
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.i2s_variant_regs = &i2sv6_regs, |
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}; |
|
|
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static const struct samsung_i2s_dai_data i2sv7_dai_type __maybe_unused = { |
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.quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR | |
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QUIRK_SUPPORTS_TDM, |
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.pcm_rates = SNDRV_PCM_RATE_8000_192000, |
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.i2s_variant_regs = &i2sv7_regs, |
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}; |
|
|
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static const struct samsung_i2s_dai_data i2sv5_dai_type_i2s1 __maybe_unused = { |
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.quirks = QUIRK_PRI_6CHAN | QUIRK_NEED_RSTCLR, |
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.pcm_rates = SNDRV_PCM_RATE_8000_96000, |
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.i2s_variant_regs = &i2sv5_i2s1_regs, |
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}; |
|
|
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static const struct platform_device_id samsung_i2s_driver_ids[] = { |
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{ |
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.name = "samsung-i2s", |
|
.driver_data = (kernel_ulong_t)&i2sv3_dai_type, |
|
}, |
|
{}, |
|
}; |
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MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids); |
|
|
|
#ifdef CONFIG_OF |
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static const struct of_device_id exynos_i2s_match[] = { |
|
{ |
|
.compatible = "samsung,s3c6410-i2s", |
|
.data = &i2sv3_dai_type, |
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}, { |
|
.compatible = "samsung,s5pv210-i2s", |
|
.data = &i2sv5_dai_type, |
|
}, { |
|
.compatible = "samsung,exynos5420-i2s", |
|
.data = &i2sv6_dai_type, |
|
}, { |
|
.compatible = "samsung,exynos7-i2s", |
|
.data = &i2sv7_dai_type, |
|
}, { |
|
.compatible = "samsung,exynos7-i2s1", |
|
.data = &i2sv5_dai_type_i2s1, |
|
}, |
|
{}, |
|
}; |
|
MODULE_DEVICE_TABLE(of, exynos_i2s_match); |
|
#endif |
|
|
|
static const struct dev_pm_ops samsung_i2s_pm = { |
|
SET_RUNTIME_PM_OPS(i2s_runtime_suspend, |
|
i2s_runtime_resume, NULL) |
|
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, |
|
pm_runtime_force_resume) |
|
}; |
|
|
|
static struct platform_driver samsung_i2s_driver = { |
|
.probe = samsung_i2s_probe, |
|
.remove = samsung_i2s_remove, |
|
.id_table = samsung_i2s_driver_ids, |
|
.driver = { |
|
.name = "samsung-i2s", |
|
.of_match_table = of_match_ptr(exynos_i2s_match), |
|
.pm = &samsung_i2s_pm, |
|
}, |
|
}; |
|
|
|
module_platform_driver(samsung_i2s_driver); |
|
|
|
/* Module information */ |
|
MODULE_AUTHOR("Jaswinder Singh, <[email protected]>"); |
|
MODULE_DESCRIPTION("Samsung I2S Interface"); |
|
MODULE_ALIAS("platform:samsung-i2s"); |
|
MODULE_LICENSE("GPL");
|
|
|