mmc: mediatek: support 24bits segment size (6ef042bd) · Commits · 戴 / test

drivers/mmc/host/mtk-sd.c

+13 −3

Original line number	Diff line number	Diff line
		@@ -328,6 +328,7 @@ struct mt_bdma_desc {
		u32 ptr;
		u32 bd_data_len;
		#define BDMA_DESC_BUFLEN (0xffff) /* bit0 ~ bit15 */
		#define BDMA_DESC_BUFLEN_EXT (0xffffff) /* bit0 ~ bit23 */
		};

		struct msdc_dma {
		@@ -641,8 +642,14 @@ static inline void msdc_dma_setup(struct msdc_host host, struct msdc_dma dma,
		bd[j].bd_info \|= (upper_32_bits(dma_address) & 0xf)
		<< 28;
		}

		if (host->dev_comp->support_64g) {
		bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN_EXT;
		bd[j].bd_data_len \|= (dma_len & BDMA_DESC_BUFLEN_EXT);
		} else {
		bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN;
		bd[j].bd_data_len \|= (dma_len & BDMA_DESC_BUFLEN);
		}

		if (j == data->sg_count - 1) /* the last bd */
		bd[j].bd_info \|= BDMA_DESC_EOL;
		@@ -2277,6 +2284,9 @@ static int msdc_drv_probe(struct platform_device *pdev)
		mmc->caps \|= MMC_CAP_ERASE \| MMC_CAP_CMD23;
		/* MMC core transfer sizes tunable parameters */
		mmc->max_segs = MAX_BD_NUM;
		if (host->dev_comp->support_64g)
		mmc->max_seg_size = BDMA_DESC_BUFLEN_EXT;
		else
		mmc->max_seg_size = BDMA_DESC_BUFLEN;
		mmc->max_blk_size = 2048;
		mmc->max_req_size = 512 * 1024;