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![Baolin Wang](/assets/img/avatar_default.png)
Change the config to 'tristate' for MCDT driver to allow it to build into modules, as well as changing to use IS_ENABLED() to validate if need supply dummy functions when building the MCDT driver as a module. Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Link: https://lore.kernel.org/r/9306f2b99641136653ae4fe6cf9e859b7f698f77.1583387748.git.baolin.wang7@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef __SPRD_MCDT_H
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#define __SPRD_MCDT_H
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enum sprd_mcdt_channel_type {
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SPRD_MCDT_DAC_CHAN,
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SPRD_MCDT_ADC_CHAN,
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SPRD_MCDT_UNKNOWN_CHAN,
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};
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enum sprd_mcdt_dma_chan {
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SPRD_MCDT_DMA_CH0,
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SPRD_MCDT_DMA_CH1,
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SPRD_MCDT_DMA_CH2,
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SPRD_MCDT_DMA_CH3,
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SPRD_MCDT_DMA_CH4,
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};
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struct sprd_mcdt_chan_callback {
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void (*notify)(void *data);
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void *data;
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};
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/**
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* struct sprd_mcdt_chan - this struct represents a single channel instance
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* @mcdt: the mcdt controller
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* @id: channel id
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* @fifo_phys: channel fifo physical address which is used for DMA transfer
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* @type: channel type
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* @cb: channel fifo interrupt's callback interface to notify the fifo events
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* @dma_enable: indicate if use DMA mode to transfer data
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* @int_enable: indicate if use interrupt mode to notify users to read or
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* write data manually
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* @list: used to link into the global list
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*
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* Note: users should not modify any members of this structure.
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*/
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struct sprd_mcdt_chan {
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struct sprd_mcdt_dev *mcdt;
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u8 id;
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unsigned long fifo_phys;
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enum sprd_mcdt_channel_type type;
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enum sprd_mcdt_dma_chan dma_chan;
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struct sprd_mcdt_chan_callback *cb;
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bool dma_enable;
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bool int_enable;
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struct list_head list;
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};
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#if IS_ENABLED(CONFIG_SND_SOC_SPRD_MCDT)
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struct sprd_mcdt_chan *sprd_mcdt_request_chan(u8 channel,
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enum sprd_mcdt_channel_type type);
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void sprd_mcdt_free_chan(struct sprd_mcdt_chan *chan);
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int sprd_mcdt_chan_write(struct sprd_mcdt_chan *chan, char *tx_buf, u32 size);
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int sprd_mcdt_chan_read(struct sprd_mcdt_chan *chan, char *rx_buf, u32 size);
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int sprd_mcdt_chan_int_enable(struct sprd_mcdt_chan *chan, u32 water_mark,
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struct sprd_mcdt_chan_callback *cb);
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void sprd_mcdt_chan_int_disable(struct sprd_mcdt_chan *chan);
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int sprd_mcdt_chan_dma_enable(struct sprd_mcdt_chan *chan,
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enum sprd_mcdt_dma_chan dma_chan, u32 water_mark);
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void sprd_mcdt_chan_dma_disable(struct sprd_mcdt_chan *chan);
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#else
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struct sprd_mcdt_chan *sprd_mcdt_request_chan(u8 channel,
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enum sprd_mcdt_channel_type type)
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{
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return NULL;
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}
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void sprd_mcdt_free_chan(struct sprd_mcdt_chan *chan)
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{ }
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int sprd_mcdt_chan_write(struct sprd_mcdt_chan *chan, char *tx_buf, u32 size)
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{
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return -EINVAL;
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}
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int sprd_mcdt_chan_read(struct sprd_mcdt_chan *chan, char *rx_buf, u32 size)
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{
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return 0;
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}
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int sprd_mcdt_chan_int_enable(struct sprd_mcdt_chan *chan, u32 water_mark,
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struct sprd_mcdt_chan_callback *cb)
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{
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return -EINVAL;
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}
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void sprd_mcdt_chan_int_disable(struct sprd_mcdt_chan *chan)
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{ }
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int sprd_mcdt_chan_dma_enable(struct sprd_mcdt_chan *chan,
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enum sprd_mcdt_dma_chan dma_chan, u32 water_mark)
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{
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return -EINVAL;
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}
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void sprd_mcdt_chan_dma_disable(struct sprd_mcdt_chan *chan)
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{ }
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#endif
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#endif /* __SPRD_MCDT_H */
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