diff options
Diffstat (limited to 'drivers/mtd/nand/raw')
| -rw-r--r-- | drivers/mtd/nand/raw/sunxi_nand.c | 38 |
1 files changed, 2 insertions, 36 deletions
diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c index b021a5720b42..e93f39bc2bc5 100644 --- a/drivers/mtd/nand/raw/sunxi_nand.c +++ b/drivers/mtd/nand/raw/sunxi_nand.c @@ -43,7 +43,6 @@ #define NFC_REG_RCMD_SET 0x0028 #define NFC_REG_WCMD_SET 0x002C #define NFC_REG_A10_IO_DATA 0x0030 -#define NFC_REG_A23_IO_DATA 0x0300 #define NFC_REG_ECC_CTL 0x0034 #define NFC_REG_ECC_ST 0x0038 #define NFC_REG_DEBUG 0x003C @@ -205,14 +204,10 @@ 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. * - * @sram_through_ahb: On A23, we choose to access the internal RAM through AHB - * instead of MBUS (less configuration). A10, A10s, A13 and - * A20 use the MBUS but no extra configuration is needed. * @reg_io_data: I/O data register * @dma_maxburst: DMA maxburst */ struct sunxi_nfc_caps { - bool sram_through_ahb; unsigned int reg_io_data; unsigned int dma_maxburst; }; @@ -368,29 +363,10 @@ static int sunxi_nfc_dma_op_prepare(struct sunxi_nfc *nfc, const void *buf, goto err_unmap_buf; } - /* - * On A23, we suppose the "internal RAM" (p.12 of the NFC user manual) - * refers to the NAND controller's internal SRAM. This memory is mapped - * and so is accessible from the AHB. It seems that it can also be - * accessed by the MBUS. MBUS accesses are mandatory when using the - * internal DMA instead of the external DMA engine. - * - * During DMA I/O operation, either we access this memory from the AHB - * by clearing the NFC_RAM_METHOD bit, or we set the bit and use the - * MBUS. In this case, we should also configure the MBUS DMA length - * NFC_REG_MDMA_CNT(0xC4) to be chunksize * nchunks. NAND I/O over MBUS - * are also limited to 32kiB pages. - */ - if (nfc->caps->sram_through_ahb) - writel(readl(nfc->regs + NFC_REG_CTL) & ~NFC_RAM_METHOD, - nfc->regs + NFC_REG_CTL); - else - writel(readl(nfc->regs + NFC_REG_CTL) | NFC_RAM_METHOD, - nfc->regs + NFC_REG_CTL); - + 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); - dmat = dmaengine_submit(dmad); ret = dma_submit_error(dmat); @@ -2199,21 +2175,11 @@ static const struct sunxi_nfc_caps sunxi_nfc_a10_caps = { .dma_maxburst = 4, }; -static const struct sunxi_nfc_caps sunxi_nfc_a23_caps = { - .sram_through_ahb = true, - .reg_io_data = NFC_REG_A23_IO_DATA, - .dma_maxburst = 8, -}; - static const struct of_device_id sunxi_nfc_ids[] = { { .compatible = "allwinner,sun4i-a10-nand", .data = &sunxi_nfc_a10_caps, }, - { - .compatible = "allwinner,sun8i-a23-nand-controller", - .data = &sunxi_nfc_a23_caps, - }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, sunxi_nfc_ids); |