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-rw-r--r--drivers/mtd/nand/raw/sunxi_nand.c117
1 files changed, 73 insertions, 44 deletions
diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index 540529540ade..1ec672bbd459 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -51,6 +51,7 @@
#define NFC_REG_USER_DATA(x) (0x0050 + ((x) * 4))
#define NFC_REG_SPARE_AREA 0x00A0
#define NFC_REG_PAT_ID 0x00A4
+#define NFC_REG_MDMA_ADDR 0x00C0
#define NFC_REG_MDMA_CNT 0x00C4
#define NFC_RAM0_BASE 0x0400
#define NFC_RAM1_BASE 0x0800
@@ -209,13 +210,13 @@ static inline struct sunxi_nand_chip *to_sunxi_nand(struct nand_chip *nand)
* NAND Controller capabilities structure: stores NAND controller capabilities
* for distinction between compatible strings.
*
- * @extra_mbus_conf: Contrary to A10, A10s and A13, accessing internal RAM
+ * @has_mdma: Use mbus dma mode, otherwise general dma
* through MBUS on A23/A33 needs extra configuration.
* @reg_io_data: I/O data register
* @dma_maxburst: DMA maxburst
*/
struct sunxi_nfc_caps {
- bool extra_mbus_conf;
+ bool has_mdma;
unsigned int reg_io_data;
unsigned int dma_maxburst;
};
@@ -365,24 +366,31 @@ static int sunxi_nfc_dma_op_prepare(struct sunxi_nfc *nfc, const void *buf,
if (!ret)
return -ENOMEM;
- dmad = dmaengine_prep_slave_sg(nfc->dmac, sg, 1, tdir, DMA_CTRL_ACK);
- if (!dmad) {
- ret = -EINVAL;
- goto err_unmap_buf;
+ if (!nfc->caps->has_mdma) {
+ dmad = dmaengine_prep_slave_sg(nfc->dmac, sg, 1, tdir, DMA_CTRL_ACK);
+ if (!dmad) {
+ ret = -EINVAL;
+ goto err_unmap_buf;
+ }
}
writel(readl(nfc->regs + NFC_REG_CTL) | NFC_RAM_METHOD,
nfc->regs + NFC_REG_CTL);
writel(nchunks, nfc->regs + NFC_REG_SECTOR_NUM);
writel(chunksize, nfc->regs + NFC_REG_CNT);
- if (nfc->caps->extra_mbus_conf)
- writel(chunksize * nchunks, nfc->regs + NFC_REG_MDMA_CNT);
- dmat = dmaengine_submit(dmad);
+ if (nfc->caps->has_mdma) {
+ writel(readl(nfc->regs + NFC_REG_CTL) & ~NFC_DMA_TYPE_NORMAL,
+ nfc->regs + NFC_REG_CTL);
+ writel(chunksize * nchunks, nfc->regs + NFC_REG_MDMA_CNT);
+ writel(sg_dma_address(sg), nfc->regs + NFC_REG_MDMA_ADDR);
+ } else {
+ dmat = dmaengine_submit(dmad);
- ret = dma_submit_error(dmat);
- if (ret)
- goto err_clr_dma_flag;
+ ret = dma_submit_error(dmat);
+ if (ret)
+ goto err_clr_dma_flag;
+ }
return 0;
@@ -913,7 +921,7 @@ static int sunxi_nfc_hw_ecc_read_chunks_dma(struct nand_chip *nand, uint8_t *buf
unsigned int max_bitflips = 0;
int ret, i, raw_mode = 0;
struct scatterlist sg;
- u32 status;
+ u32 status, wait;
ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
if (ret)
@@ -931,13 +939,18 @@ static int sunxi_nfc_hw_ecc_read_chunks_dma(struct nand_chip *nand, uint8_t *buf
writel((NAND_CMD_RNDOUTSTART << 16) | (NAND_CMD_RNDOUT << 8) |
NAND_CMD_READSTART, nfc->regs + NFC_REG_RCMD_SET);
- dma_async_issue_pending(nfc->dmac);
+ wait = NFC_CMD_INT_FLAG;
+
+ if (nfc->caps->has_mdma)
+ wait |= NFC_DMA_INT_FLAG;
+ else
+ dma_async_issue_pending(nfc->dmac);
writel(NFC_PAGE_OP | NFC_DATA_SWAP_METHOD | NFC_DATA_TRANS,
nfc->regs + NFC_REG_CMD);
- ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, false, 0);
- if (ret)
+ ret = sunxi_nfc_wait_events(nfc, wait, false, 0);
+ if (ret && !nfc->caps->has_mdma)
dmaengine_terminate_all(nfc->dmac);
sunxi_nfc_randomizer_disable(nand);
@@ -1278,6 +1291,7 @@ static int sunxi_nfc_hw_ecc_write_page_dma(struct nand_chip *nand,
struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
struct nand_ecc_ctrl *ecc = &nand->ecc;
struct scatterlist sg;
+ u32 wait;
int ret, i;
sunxi_nfc_select_chip(nand, nand->cur_cs);
@@ -1306,14 +1320,19 @@ static int sunxi_nfc_hw_ecc_write_page_dma(struct nand_chip *nand,
writel((NAND_CMD_RNDIN << 8) | NAND_CMD_PAGEPROG,
nfc->regs + NFC_REG_WCMD_SET);
- dma_async_issue_pending(nfc->dmac);
+ wait = NFC_CMD_INT_FLAG;
+
+ if (nfc->caps->has_mdma)
+ wait |= NFC_DMA_INT_FLAG;
+ else
+ dma_async_issue_pending(nfc->dmac);
writel(NFC_PAGE_OP | NFC_DATA_SWAP_METHOD |
NFC_DATA_TRANS | NFC_ACCESS_DIR,
nfc->regs + NFC_REG_CMD);
- ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, false, 0);
- if (ret)
+ ret = sunxi_nfc_wait_events(nfc, wait, false, 0);
+ if (ret && !nfc->caps->has_mdma)
dmaengine_terminate_all(nfc->dmac);
sunxi_nfc_randomizer_disable(nand);
@@ -1696,7 +1715,7 @@ static int sunxi_nand_hw_ecc_ctrl_init(struct nand_chip *nand,
ecc->write_oob = sunxi_nfc_hw_ecc_write_oob;
mtd_set_ooblayout(mtd, &sunxi_nand_ooblayout_ops);
- if (nfc->dmac) {
+ if (nfc->dmac || nfc->caps->has_mdma) {
ecc->read_page = sunxi_nfc_hw_ecc_read_page_dma;
ecc->read_subpage = sunxi_nfc_hw_ecc_read_subpage_dma;
ecc->write_page = sunxi_nfc_hw_ecc_write_page_dma;
@@ -2061,6 +2080,36 @@ static void sunxi_nand_chips_cleanup(struct sunxi_nfc *nfc)
}
}
+static int sunxi_nfc_dma_init(struct sunxi_nfc *nfc, struct resource *r)
+{
+ int ret;
+
+ if (nfc->caps->has_mdma)
+ return 0;
+
+ nfc->dmac = dma_request_chan(nfc->dev, "rxtx");
+ if (IS_ERR(nfc->dmac)) {
+ ret = PTR_ERR(nfc->dmac);
+ if (ret == -EPROBE_DEFER)
+ return ret;
+
+ /* Ignore errors to fall back to PIO mode */
+ dev_warn(nfc->dev, "failed to request rxtx DMA channel: %d\n", ret);
+ nfc->dmac = NULL;
+ } else {
+ struct dma_slave_config dmac_cfg = { };
+
+ dmac_cfg.src_addr = r->start + nfc->caps->reg_io_data;
+ dmac_cfg.dst_addr = dmac_cfg.src_addr;
+ dmac_cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dmac_cfg.dst_addr_width = dmac_cfg.src_addr_width;
+ dmac_cfg.src_maxburst = nfc->caps->dma_maxburst;
+ dmac_cfg.dst_maxburst = nfc->caps->dma_maxburst;
+ dmaengine_slave_config(nfc->dmac, &dmac_cfg);
+ }
+ return 0;
+}
+
static int sunxi_nfc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -2135,30 +2184,10 @@ static int sunxi_nfc_probe(struct platform_device *pdev)
if (ret)
goto out_ahb_reset_reassert;
- nfc->dmac = dma_request_chan(dev, "rxtx");
- if (IS_ERR(nfc->dmac)) {
- ret = PTR_ERR(nfc->dmac);
- if (ret == -EPROBE_DEFER)
- goto out_ahb_reset_reassert;
+ ret = sunxi_nfc_dma_init(nfc, r);
- /* Ignore errors to fall back to PIO mode */
- dev_warn(dev, "failed to request rxtx DMA channel: %d\n", ret);
- nfc->dmac = NULL;
- } else {
- struct dma_slave_config dmac_cfg = { };
-
- dmac_cfg.src_addr = r->start + nfc->caps->reg_io_data;
- dmac_cfg.dst_addr = dmac_cfg.src_addr;
- dmac_cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
- dmac_cfg.dst_addr_width = dmac_cfg.src_addr_width;
- dmac_cfg.src_maxburst = nfc->caps->dma_maxburst;
- dmac_cfg.dst_maxburst = nfc->caps->dma_maxburst;
- dmaengine_slave_config(nfc->dmac, &dmac_cfg);
-
- if (nfc->caps->extra_mbus_conf)
- writel(readl(nfc->regs + NFC_REG_CTL) |
- NFC_DMA_TYPE_NORMAL, nfc->regs + NFC_REG_CTL);
- }
+ if (ret)
+ goto out_ahb_reset_reassert;
platform_set_drvdata(pdev, nfc);
@@ -2205,7 +2234,7 @@ static const struct sunxi_nfc_caps sunxi_nfc_a10_caps = {
};
static const struct sunxi_nfc_caps sunxi_nfc_a23_caps = {
- .extra_mbus_conf = true,
+ .has_mdma = true,
.reg_io_data = NFC_REG_A23_IO_DATA,
.dma_maxburst = 8,
};
generated by cgit (git 2.34.1) at 2025-06-10 14:56:01 +0000