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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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4d1a3a0dc5
The ST Micro variant supports bus signal direction indication. A new member in the variant struct is added for this. Moreover the actual signal direction configuration is board specific, thus the amba mmci platform data is extended with a new member to be able provide mmci with these specific board configurations. This patch is based upon a patch from Sebastian Rasmussen. Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Sebastian Rasmussen <sebastian.rasmussen@stericsson.com> Signed-off-by: Ulf Hansson <ulf.hansson@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
79 lines
2.9 KiB
C
79 lines
2.9 KiB
C
/*
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* include/linux/amba/mmci.h
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*/
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#ifndef AMBA_MMCI_H
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#define AMBA_MMCI_H
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#include <linux/mmc/host.h>
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/*
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* These defines is places here due to access is needed from machine
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* configuration files. The ST Micro version does not have ROD and
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* reuse the voltage registers for direction settings.
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*/
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#define MCI_ST_DATA2DIREN (1 << 2)
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#define MCI_ST_CMDDIREN (1 << 3)
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#define MCI_ST_DATA0DIREN (1 << 4)
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#define MCI_ST_DATA31DIREN (1 << 5)
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#define MCI_ST_FBCLKEN (1 << 7)
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#define MCI_ST_DATA74DIREN (1 << 8)
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/* Just some dummy forwarding */
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struct dma_chan;
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/**
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* struct mmci_platform_data - platform configuration for the MMCI
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* (also known as PL180) block.
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* @f_max: the maximum operational frequency for this host in this
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* platform configuration. When this is specified it takes precedence
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* over the module parameter for the same frequency.
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* @ocr_mask: available voltages on the 4 pins from the block, this
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* is ignored if a regulator is used, see the MMC_VDD_* masks in
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* mmc/host.h
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* @vdd_handler: a callback function to translate a MMC_VDD_*
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* mask into a value to be binary (or set some other custom bits
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* in MMCIPWR) or:ed and written into the MMCIPWR register of the
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* block. May also control external power based on the power_mode.
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* @status: if no GPIO read function was given to the block in
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* gpio_wp (below) this function will be called to determine
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* whether a card is present in the MMC slot or not
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* @gpio_wp: read this GPIO pin to see if the card is write protected
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* @gpio_cd: read this GPIO pin to detect card insertion
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* @cd_invert: true if the gpio_cd pin value is active low
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* @capabilities: the capabilities of the block as implemented in
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* this platform, signify anything MMC_CAP_* from mmc/host.h
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* @capabilities2: more capabilities, MMC_CAP2_* from mmc/host.h
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* @sigdir: a bit field indicating for what bits in the MMC bus the host
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* should enable signal direction indication.
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* @dma_filter: function used to select an appropriate RX and TX
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* DMA channel to be used for DMA, if and only if you're deploying the
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* generic DMA engine
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* @dma_rx_param: parameter passed to the DMA allocation
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* filter in order to select an appropriate RX channel. If
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* there is a bidirectional RX+TX channel, then just specify
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* this and leave dma_tx_param set to NULL
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* @dma_tx_param: parameter passed to the DMA allocation
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* filter in order to select an appropriate TX channel. If this
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* is NULL the driver will attempt to use the RX channel as a
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* bidirectional channel
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*/
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struct mmci_platform_data {
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unsigned int f_max;
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unsigned int ocr_mask;
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u32 (*vdd_handler)(struct device *, unsigned int vdd,
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unsigned char power_mode);
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unsigned int (*status)(struct device *);
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int gpio_wp;
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int gpio_cd;
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bool cd_invert;
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unsigned long capabilities;
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unsigned long capabilities2;
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u32 sigdir;
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bool (*dma_filter)(struct dma_chan *chan, void *filter_param);
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void *dma_rx_param;
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void *dma_tx_param;
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};
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#endif
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