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Read time: 4 minute(s)
< / div > < div class = "- topic/body concept/conbody body conbody" > < div class = "- topic/p p" data-ofbid = "d81533e22__20250121171525" > SDMC 数据类型及其结构描述如下：< ul class = "- topic/ul ul" id = "sdmc_data_structure_design__ol_tcb_tst_c1c" data-ofbid = "sdmc_data_structure_design__ol_tcb_tst_c1c" > < li class = "- topic/li li" data-ofbid = "d81533e25__20250121171525" > < strong class = "+ topic/ph hi-d/b ph b" > enum
artinchip_mmc_state< / strong > ：定义了 SDMC 控制器的状态。< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "sdmc_data_structure_design__codeblock_s25_5st_c1c" data-ofbid = "sdmc_data_structure_design__codeblock_s25_5st_c1c" > < strong class = "hl-keyword" > enum< / strong > artinchip_mmc_state {
STATE_IDLE = < span class = "hl-number" > 0< / span > ,
STATE_SENDING_CMD,
STATE_SENDING_DATA,
STATE_DATA_BUSY,
STATE_SENDING_STOP,
STATE_DATA_ERROR,
STATE_SENDING_CMD11,
STATE_WAITING_CMD11_DONE,
};< / pre > < / li > < li class = "- topic/li li" data-ofbid = "d81533e31__20250121171525" > < strong class = "+ topic/ph hi-d/b ph b" > artinchip_mmc< / strong > ：记录了 SDMC 控制器的设备信息。< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "sdmc_data_structure_design__codeblock_yjs_vst_c1c" data-ofbid = "sdmc_data_structure_design__codeblock_yjs_vst_c1c" > < strong class = "hl-keyword" > struct< / strong > artinchip_mmc {
spinlock_t lock;
spinlock_t irq_lock;
< strong class = "hl-keyword" > void< / strong > __iomem *regs;
< strong class = "hl-keyword" > void< / strong > __iomem *fifo_reg;
bool wm_aligned;
< strong class = "hl-keyword" > struct< / strong > scatterlist *sg;
< strong class = "hl-keyword" > struct< / strong > sg_mapping_iter sg_miter;
< strong class = "hl-keyword" > struct< / strong > mmc_request *mrq;
< strong class = "hl-keyword" > struct< / strong > mmc_command *cmd;
< strong class = "hl-keyword" > struct< / strong > mmc_data *data;
< strong class = "hl-keyword" > struct< / strong > mmc_command stop_abort;
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > int< / strong > prev_blksz;
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > char< / strong > timing;
< em class = "hl-comment" > /* DMA interface members*/< / em >
bool use_dma;
bool using_dma;
dma_addr_t sg_dma;
< strong class = "hl-keyword" > void< / strong > *sg_cpu;
< strong class = "hl-keyword" > const< / strong > < strong class = "hl-keyword" > struct< / strong > artinchip_mmc_dma_ops *dma_ops;
< em class = "hl-comment" > /* For idmac */< / em >
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > int< / strong > ring_size;
< em class = "hl-comment" > /* Registers's physical base address */< / em >
resource_size_t phy_regs;
u32 cmd_status;
u32 data_status;
u32 stop_cmdr;
u32 dir_status;
< strong class = "hl-keyword" > struct< / strong > tasklet_struct tasklet;
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > long< / strong > pending_events;
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > long< / strong > completed_events;
< strong class = "hl-keyword" > enum< / strong > artinchip_mmc_state state;
< strong class = "hl-keyword" > struct< / strong > list_head queue;
u32 bus_hz;
u32 current_speed;
u32 fifoth_val;
u16 verid;
< strong class = "hl-keyword" > struct< / strong > device *dev;
< strong class = "hl-keyword" > struct< / strong > artinchip_mmc_board *pdata;
< strong class = "hl-keyword" > const< / strong > < strong class = "hl-keyword" > struct< / strong > artinchip_mmc_drv_data *drv_data;
< strong class = "hl-keyword" > void< / strong > *priv;
< strong class = "hl-keyword" > struct< / strong > clk *biu_clk;
< strong class = "hl-keyword" > struct< / strong > clk *ciu_clk;
< strong class = "hl-keyword" > struct< / strong > artinchip_mmc_slot *slot;
< em class = "hl-comment" > /* FIFO push and pull */< / em >
< strong class = "hl-keyword" > int< / strong > fifo_depth;
< strong class = "hl-keyword" > int< / strong > data_shift;
u8 part_buf_start;
u8 part_buf_count;
< strong class = "hl-keyword" > enum< / strong > data_width data_width;
< strong class = "hl-keyword" > union< / strong > {
u16 part_buf16;
u32 part_buf32;
u64 part_buf;
};
bool vqmmc_enabled;
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > long< / strong > irq_flags; < em class = "hl-comment" > /* IRQ flags */< / em >
< strong class = "hl-keyword" > int< / strong > irq;
< strong class = "hl-keyword" > struct< / strong > timer_list cmd11_timer;
< strong class = "hl-keyword" > struct< / strong > timer_list cto_timer;
< strong class = "hl-keyword" > struct< / strong > timer_list dto_timer;
};< / pre > < / li > < li class = "- topic/li li" data-ofbid = "d81533e37__20250121171525" > < strong class = "+ topic/ph hi-d/b ph b" > artinchip_mmc_board< / strong > ：记录了 Board 相关的配置信息。< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "sdmc_data_structure_design__codeblock_hn2_1tt_c1c" data-ofbid = "sdmc_data_structure_design__codeblock_hn2_1tt_c1c" > < strong class = "hl-keyword" > struct< / strong > artinchip_mmc_board {
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > int< / strong > bus_hz; < em class = "hl-comment" > /* Clock speed at the cclk_in pad */< / em >
u32 caps; < em class = "hl-comment" > /* Capabilities */< / em >
u32 caps2; < em class = "hl-comment" > /* More capabilities */< / em >
u32 pm_caps; < em class = "hl-comment" > /* PM capabilities */< / em >
< em class = "hl-comment" > /*
* Override fifo depth. If 0, autodetect it from the FIFOTH register,
* but note that this may not be reliable after a bootloader has used
* it.
*/< / em >
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > int< / strong > fifo_depth;
< em class = "hl-comment" > /* delay in mS before detecting cards after interrupt */< / em >
u32 detect_delay_ms;
< strong class = "hl-keyword" > struct< / strong > reset_control *rstc;
< strong class = "hl-keyword" > struct< / strong > artinchip_mmc_dma_ops *dma_ops;
< strong class = "hl-keyword" > struct< / strong > dma_pdata *data;
};< / pre > < / li > < li class = "- topic/li li" data-ofbid = "d81533e43__20250121171525" > < strong class = "+ topic/ph hi-d/b ph b" > artinchip_mmc_slot< / strong > ：记录了 slot 相关的配置信息。< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "sdmc_data_structure_design__codeblock_ayj_1tt_c1c" data-ofbid = "sdmc_data_structure_design__codeblock_ayj_1tt_c1c" > < strong class = "hl-keyword" > struct< / strong > artinchip_mmc_slot {
< strong class = "hl-keyword" > struct< / strong > mmc_host *mmc;
< strong class = "hl-keyword" > struct< / strong > artinchip_mmc *host;
u32 ctype;
< strong class = "hl-keyword" > struct< / strong > mmc_request *mrq;
< strong class = "hl-keyword" > struct< / strong > list_head queue_node;
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > int< / strong > clock;
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > int< / strong > __clk_old;
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > long< / strong > flags;
#< span class = "hl-directive" > define< / span > ARTINCHIP_MMC_CARD_PRESENT < span class = "hl-number" > 0< / span >
#< span class = "hl-directive" > define< / span > ARTINCHIP_MMC_CARD_NEED_INIT < span class = "hl-number" > 1< / span >
#< span class = "hl-directive" > define< / span > ARTINCHIP_MMC_CARD_NO_LOW_PWR < span class = "hl-number" > 2< / span >
#< span class = "hl-directive" > define< / span > ARTINCHIP_MMC_CARD_NO_USE_HOLD < span class = "hl-number" > 3< / span >
#< span class = "hl-directive" > define< / span > ARTINCHIP_MMC_CARD_NEEDS_POLL < span class = "hl-number" > 4< / span >
};< / pre > < / li > < li class = "- topic/li li" data-ofbid = "d81533e49__20250121171525" > < strong class = "+ topic/ph hi-d/b ph b" > artinchip_mmc_drv_data< / strong > ：记录了 AIC SDMC
驱动的特有数据。< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "sdmc_data_structure_design__codeblock_hbp_1tt_c1c" data-ofbid = "sdmc_data_structure_design__codeblock_hbp_1tt_c1c" > < strong class = "hl-keyword" > struct< / strong > artinchip_mmc_drv_data {
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > long< / strong > *caps;
u32 num_caps;
< strong class = "hl-keyword" > int< / strong > (*init)(< strong class = "hl-keyword" > struct< / strong > artinchip_mmc *host);
< strong class = "hl-keyword" > int< / strong > (*parse_dt)(< strong class = "hl-keyword" > struct< / strong > artinchip_mmc *host);
< strong class = "hl-keyword" > int< / strong > (*execute_tuning)(< strong class = "hl-keyword" > struct< / strong > artinchip_mmc_slot *slot, u32 opcode);
< strong class = "hl-keyword" > int< / strong > (*switch_voltage)(< strong class = "hl-keyword" > struct< / strong > mmc_host *mmc,
< strong class = "hl-keyword" > struct< / strong > mmc_ios *ios);
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