[PATCH v2] mmc: mediatek: add 64G DRAM DMA support
Chaotian Jing
chaotian.jing at mediatek.com
Wed Apr 25 00:19:03 PDT 2018
MT2712 MSDC supports 64G DRAM DMA access, it needs update
gpd/bd structure.
Signed-off-by: Chaotian Jing <chaotian.jing at mediatek.com>
---
drivers/mmc/host/mtk-sd.c | 56 +++++++++++++++++++++++++++++++++++++++++------
1 file changed, 49 insertions(+), 7 deletions(-)
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index d642e11..0484138 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -71,6 +71,7 @@
#define SDC_ADV_CFG0 0x64
#define EMMC_IOCON 0x7c
#define SDC_ACMD_RESP 0x80
+#define DMA_SA_H4BIT 0x8c
#define MSDC_DMA_SA 0x90
#define MSDC_DMA_CTRL 0x98
#define MSDC_DMA_CFG 0x9c
@@ -195,6 +196,9 @@
/* SDC_ADV_CFG0 mask */
#define SDC_RX_ENHANCE_EN (0x1 << 20) /* RW */
+/* DMA_SA_H4BIT mask */
+#define DMA_ADDR_HIGH_4BIT (0xf << 0) /* RW */
+
/* MSDC_DMA_CTRL mask */
#define MSDC_DMA_CTRL_START (0x1 << 0) /* W */
#define MSDC_DMA_CTRL_STOP (0x1 << 1) /* W */
@@ -228,6 +232,7 @@
#define MSDC_PATCH_BIT2_CFGRESP (0x1 << 15) /* RW */
#define MSDC_PATCH_BIT2_CFGCRCSTS (0x1 << 28) /* RW */
+#define MSDC_PB2_SUPPORT_64G (0x1 << 1) /* RW */
#define MSDC_PB2_RESPWAIT (0x3 << 2) /* RW */
#define MSDC_PB2_RESPSTSENSEL (0x7 << 16) /* RW */
#define MSDC_PB2_CRCSTSENSEL (0x7 << 29) /* RW */
@@ -281,6 +286,8 @@ struct mt_gpdma_desc {
#define GPDMA_DESC_BDP (0x1 << 1)
#define GPDMA_DESC_CHECKSUM (0xff << 8) /* bit8 ~ bit15 */
#define GPDMA_DESC_INT (0x1 << 16)
+#define GPDMA_DESC_NEXT_H4 (0xf << 24)
+#define GPDMA_DESC_PTR_H4 (0xf << 28)
u32 next;
u32 ptr;
u32 gpd_data_len;
@@ -297,6 +304,8 @@ struct mt_bdma_desc {
#define BDMA_DESC_CHECKSUM (0xff << 8) /* bit8 ~ bit15 */
#define BDMA_DESC_BLKPAD (0x1 << 17)
#define BDMA_DESC_DWPAD (0x1 << 18)
+#define BDMA_DESC_NEXT_H4 (0xf << 24)
+#define BDMA_DESC_PTR_H4 (0xf << 28)
u32 next;
u32 ptr;
u32 bd_data_len;
@@ -335,6 +344,7 @@ struct mtk_mmc_compatible {
bool busy_check;
bool stop_clk_fix;
bool enhance_rx;
+ bool support_64g;
};
struct msdc_tune_para {
@@ -404,6 +414,7 @@ struct msdc_host {
.busy_check = false,
.stop_clk_fix = false,
.enhance_rx = false,
+ .support_64g = false,
};
static const struct mtk_mmc_compatible mt8173_compat = {
@@ -415,6 +426,7 @@ struct msdc_host {
.busy_check = false,
.stop_clk_fix = false,
.enhance_rx = false,
+ .support_64g = false,
};
static const struct mtk_mmc_compatible mt2701_compat = {
@@ -426,6 +438,7 @@ struct msdc_host {
.busy_check = false,
.stop_clk_fix = false,
.enhance_rx = false,
+ .support_64g = false,
};
static const struct mtk_mmc_compatible mt2712_compat = {
@@ -437,6 +450,7 @@ struct msdc_host {
.busy_check = true,
.stop_clk_fix = true,
.enhance_rx = true,
+ .support_64g = true,
};
static const struct mtk_mmc_compatible mt7622_compat = {
@@ -448,6 +462,7 @@ struct msdc_host {
.busy_check = true,
.stop_clk_fix = true,
.enhance_rx = true,
+ .support_64g = false,
};
static const struct of_device_id msdc_of_ids[] = {
@@ -557,7 +572,12 @@ static inline void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma,
/* init bd */
bd[j].bd_info &= ~BDMA_DESC_BLKPAD;
bd[j].bd_info &= ~BDMA_DESC_DWPAD;
- bd[j].ptr = (u32)dma_address;
+ bd[j].ptr = lower_32_bits(dma_address);
+ if (host->dev_comp->support_64g) {
+ bd[j].bd_info &= ~BDMA_DESC_PTR_H4;
+ bd[j].bd_info |= (upper_32_bits(dma_address) & 0xf)
+ << 28;
+ }
bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN;
bd[j].bd_data_len |= (dma_len & BDMA_DESC_BUFLEN);
@@ -576,7 +596,10 @@ static inline void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma,
dma_ctrl &= ~(MSDC_DMA_CTRL_BRUSTSZ | MSDC_DMA_CTRL_MODE);
dma_ctrl |= (MSDC_BURST_64B << 12 | 1 << 8);
writel_relaxed(dma_ctrl, host->base + MSDC_DMA_CTRL);
- writel((u32)dma->gpd_addr, host->base + MSDC_DMA_SA);
+ if (host->dev_comp->support_64g)
+ sdr_set_field(host->base + DMA_SA_H4BIT, DMA_ADDR_HIGH_4BIT,
+ upper_32_bits(dma->gpd_addr) & 0xf);
+ writel(lower_32_bits(dma->gpd_addr), host->base + MSDC_DMA_SA);
}
static void msdc_prepare_data(struct msdc_host *host, struct mmc_request *mrq)
@@ -1367,6 +1390,9 @@ static void msdc_init_hw(struct msdc_host *host)
MSDC_PATCH_BIT2_CFGCRCSTS);
}
+ if (host->dev_comp->support_64g)
+ sdr_set_bits(host->base + MSDC_PATCH_BIT2,
+ MSDC_PB2_SUPPORT_64G);
if (host->dev_comp->data_tune) {
sdr_set_bits(host->base + tune_reg,
MSDC_PAD_TUNE_RD_SEL | MSDC_PAD_TUNE_CMD_SEL);
@@ -1408,19 +1434,32 @@ static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma)
{
struct mt_gpdma_desc *gpd = dma->gpd;
struct mt_bdma_desc *bd = dma->bd;
+ dma_addr_t dma_addr;
int i;
memset(gpd, 0, sizeof(struct mt_gpdma_desc) * 2);
+ dma_addr = dma->gpd_addr + sizeof(struct mt_gpdma_desc);
gpd->gpd_info = GPDMA_DESC_BDP; /* hwo, cs, bd pointer */
- gpd->ptr = (u32)dma->bd_addr; /* physical address */
/* gpd->next is must set for desc DMA
* That's why must alloc 2 gpd structure.
*/
- gpd->next = (u32)dma->gpd_addr + sizeof(struct mt_gpdma_desc);
+ gpd->next = lower_32_bits(dma_addr);
+ if (host->dev_comp->support_64g)
+ gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 24;
+
+ dma_addr = dma->bd_addr;
+ gpd->ptr = lower_32_bits(dma->bd_addr); /* physical address */
+ if (host->dev_comp->support_64g)
+ gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 28;
+
memset(bd, 0, sizeof(struct mt_bdma_desc) * MAX_BD_NUM);
- for (i = 0; i < (MAX_BD_NUM - 1); i++)
- bd[i].next = (u32)dma->bd_addr + sizeof(*bd) * (i + 1);
+ for (i = 0; i < (MAX_BD_NUM - 1); i++) {
+ dma_addr = dma->bd_addr + sizeof(*bd) * (i + 1);
+ bd[i].next = lower_32_bits(dma_addr);
+ if (host->dev_comp->support_64g)
+ bd[i].bd_info |= (upper_32_bits(dma_addr) & 0xf) << 24;
+ }
}
static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
@@ -1913,7 +1952,10 @@ static int msdc_drv_probe(struct platform_device *pdev)
mmc->max_blk_size = 2048;
mmc->max_req_size = 512 * 1024;
mmc->max_blk_count = mmc->max_req_size / 512;
- host->dma_mask = DMA_BIT_MASK(32);
+ if (host->dev_comp->support_64g)
+ host->dma_mask = DMA_BIT_MASK(36);
+ else
+ host->dma_mask = DMA_BIT_MASK(32);
mmc_dev(mmc)->dma_mask = &host->dma_mask;
host->timeout_clks = 3 * 1048576;
--
1.8.1.1.dirty
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