From: Piotr Zierhoffer Date: Thu, 23 Jul 2015 12:33:02 +0000 (+0200) Subject: sunxi: nand: Add basic sunxi NAND driver for SPL with DMA support X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=aeb4b0d3b35c9eb361bcffee9c48e9bd8debd5b9;p=project%2Fbcm63xx%2Fu-boot.git sunxi: nand: Add basic sunxi NAND driver for SPL with DMA support This driver adds NAND support to SPL. It was tested on Allwinner A20. Signed-off-by: Peter Gielda Signed-off-by: Tomasz Gorochowik Signed-off-by: Mateusz Holenko Signed-off-by: Piotr Zierhoffer Signed-off-by: Karol Gugala Acked-by: Hans de Goede Signed-off-by: Hans de Goede --- diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index 347ea62e0b..b40dda890e 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -12,6 +12,7 @@ NORMAL_DRIVERS=y endif obj-$(CONFIG_SPL_NAND_AM33XX_BCH) += am335x_spl_bch.o +obj-$(CONFIG_SPL_NAND_SUNXI) += sunxi_nand_spl.o obj-$(CONFIG_SPL_NAND_DENALI) += denali_spl.o obj-$(CONFIG_SPL_NAND_DOCG4) += docg4_spl.o obj-$(CONFIG_SPL_NAND_SIMPLE) += nand_spl_simple.o diff --git a/drivers/mtd/nand/sunxi_nand_spl.c b/drivers/mtd/nand/sunxi_nand_spl.c new file mode 100644 index 0000000000..ac5f56d066 --- /dev/null +++ b/drivers/mtd/nand/sunxi_nand_spl.c @@ -0,0 +1,353 @@ +/* + * Copyright (c) 2014-2015, Antmicro Ltd + * Copyright (c) 2015, AW-SOM Technologies + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include + +/* registers */ +#define NFC_CTL 0x00000000 +#define NFC_ST 0x00000004 +#define NFC_INT 0x00000008 +#define NFC_TIMING_CTL 0x0000000C +#define NFC_TIMING_CFG 0x00000010 +#define NFC_ADDR_LOW 0x00000014 +#define NFC_ADDR_HIGH 0x00000018 +#define NFC_SECTOR_NUM 0x0000001C +#define NFC_CNT 0x00000020 +#define NFC_CMD 0x00000024 +#define NFC_RCMD_SET 0x00000028 +#define NFC_WCMD_SET 0x0000002C +#define NFC_IO_DATA 0x00000030 +#define NFC_ECC_CTL 0x00000034 +#define NFC_ECC_ST 0x00000038 +#define NFC_DEBUG 0x0000003C +#define NFC_ECC_CNT0 0x00000040 +#define NFC_ECC_CNT1 0x00000044 +#define NFC_ECC_CNT2 0x00000048 +#define NFC_ECC_CNT3 0x0000004C +#define NFC_USER_DATA_BASE 0x00000050 +#define NFC_EFNAND_STATUS 0x00000090 +#define NFC_SPARE_AREA 0x000000A0 +#define NFC_PATTERN_ID 0x000000A4 +#define NFC_RAM0_BASE 0x00000400 +#define NFC_RAM1_BASE 0x00000800 + +#define NFC_CTL_EN (1 << 0) +#define NFC_CTL_RESET (1 << 1) +#define NFC_CTL_RAM_METHOD (1 << 14) + + +#define NFC_ECC_EN (1 << 0) +#define NFC_ECC_PIPELINE (1 << 3) +#define NFC_ECC_EXCEPTION (1 << 4) +#define NFC_ECC_BLOCK_SIZE (1 << 5) +#define NFC_ECC_RANDOM_EN (1 << 9) +#define NFC_ECC_RANDOM_DIRECTION (1 << 10) + + +#define NFC_ADDR_NUM_OFFSET 16 +#define NFC_SEND_ADR (1 << 19) +#define NFC_ACCESS_DIR (1 << 20) +#define NFC_DATA_TRANS (1 << 21) +#define NFC_SEND_CMD1 (1 << 22) +#define NFC_WAIT_FLAG (1 << 23) +#define NFC_SEND_CMD2 (1 << 24) +#define NFC_SEQ (1 << 25) +#define NFC_DATA_SWAP_METHOD (1 << 26) +#define NFC_ROW_AUTO_INC (1 << 27) +#define NFC_SEND_CMD3 (1 << 28) +#define NFC_SEND_CMD4 (1 << 29) + +#define NFC_CMD_INT_FLAG (1 << 1) + +#define NFC_READ_CMD_OFFSET 0 +#define NFC_RANDOM_READ_CMD0_OFFSET 8 +#define NFC_RANDOM_READ_CMD1_OFFSET 16 + +#define NFC_CMD_RNDOUTSTART 0xE0 +#define NFC_CMD_RNDOUT 0x05 +#define NFC_CMD_READSTART 0x30 + + +#define NFC_PAGE_CMD (2 << 30) + +#define SUNXI_DMA_CFG_REG0 0x300 +#define SUNXI_DMA_SRC_START_ADDR_REG0 0x304 +#define SUNXI_DMA_DEST_START_ADDRR_REG0 0x308 +#define SUNXI_DMA_DDMA_BC_REG0 0x30C +#define SUNXI_DMA_DDMA_PARA_REG0 0x318 + +#define SUNXI_DMA_DDMA_CFG_REG_LOADING (1 << 31) +#define SUNXI_DMA_DDMA_CFG_REG_DMA_DEST_DATA_WIDTH_32 (2 << 25) +#define SUNXI_DMA_DDMA_CFG_REG_DMA_SRC_DATA_WIDTH_32 (2 << 9) +#define SUNXI_DMA_DDMA_CFG_REG_DMA_SRC_ADDR_MODE_IO (1 << 5) +#define SUNXI_DMA_DDMA_CFG_REG_DDMA_SRC_DRQ_TYPE_NFC (3 << 0) + +#define SUNXI_DMA_DDMA_PARA_REG_SRC_WAIT_CYC (0x0F << 0) +#define SUNXI_DMA_DDMA_PARA_REG_SRC_BLK_SIZE (0x7F << 8) + +/* minimal "boot0" style NAND support for Allwinner A20 */ + +/* temporary buffer in internal ram */ +unsigned char temp_buf[CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE] + __aligned(0x10) __section(".text#"); + +/* random seed used by linux */ +const uint16_t random_seed[128] = { + 0x2b75, 0x0bd0, 0x5ca3, 0x62d1, 0x1c93, 0x07e9, 0x2162, 0x3a72, + 0x0d67, 0x67f9, 0x1be7, 0x077d, 0x032f, 0x0dac, 0x2716, 0x2436, + 0x7922, 0x1510, 0x3860, 0x5287, 0x480f, 0x4252, 0x1789, 0x5a2d, + 0x2a49, 0x5e10, 0x437f, 0x4b4e, 0x2f45, 0x216e, 0x5cb7, 0x7130, + 0x2a3f, 0x60e4, 0x4dc9, 0x0ef0, 0x0f52, 0x1bb9, 0x6211, 0x7a56, + 0x226d, 0x4ea7, 0x6f36, 0x3692, 0x38bf, 0x0c62, 0x05eb, 0x4c55, + 0x60f4, 0x728c, 0x3b6f, 0x2037, 0x7f69, 0x0936, 0x651a, 0x4ceb, + 0x6218, 0x79f3, 0x383f, 0x18d9, 0x4f05, 0x5c82, 0x2912, 0x6f17, + 0x6856, 0x5938, 0x1007, 0x61ab, 0x3e7f, 0x57c2, 0x542f, 0x4f62, + 0x7454, 0x2eac, 0x7739, 0x42d4, 0x2f90, 0x435a, 0x2e52, 0x2064, + 0x637c, 0x66ad, 0x2c90, 0x0bad, 0x759c, 0x0029, 0x0986, 0x7126, + 0x1ca7, 0x1605, 0x386a, 0x27f5, 0x1380, 0x6d75, 0x24c3, 0x0f8e, + 0x2b7a, 0x1418, 0x1fd1, 0x7dc1, 0x2d8e, 0x43af, 0x2267, 0x7da3, + 0x4e3d, 0x1338, 0x50db, 0x454d, 0x764d, 0x40a3, 0x42e6, 0x262b, + 0x2d2e, 0x1aea, 0x2e17, 0x173d, 0x3a6e, 0x71bf, 0x25f9, 0x0a5d, + 0x7c57, 0x0fbe, 0x46ce, 0x4939, 0x6b17, 0x37bb, 0x3e91, 0x76db, +}; + +/* random seed used for syndrome calls */ +const uint16_t random_seed_syndrome = 0x4a80; + +#define MAX_RETRIES 10 + +static int check_value_inner(int offset, int expected_bits, + int max_number_of_retries, int negation) +{ + int retries = 0; + do { + int val = readl(offset) & expected_bits; + if (negation ? !val : val) + return 1; + mdelay(1); + retries++; + } while (retries < max_number_of_retries); + + return 0; +} + +static inline int check_value(int offset, int expected_bits, + int max_number_of_retries) +{ + return check_value_inner(offset, expected_bits, + max_number_of_retries, 0); +} + +static inline int check_value_negated(int offset, int unexpected_bits, + int max_number_of_retries) +{ + return check_value_inner(offset, unexpected_bits, + max_number_of_retries, 1); +} + +void nand_init(void) +{ + uint32_t val; + + val = readl(SUNXI_NFC_BASE + NFC_CTL); + /* enable and reset CTL */ + writel(val | NFC_CTL_EN | NFC_CTL_RESET, + SUNXI_NFC_BASE + NFC_CTL); + + if (!check_value_negated(SUNXI_NFC_BASE + NFC_CTL, + NFC_CTL_RESET, MAX_RETRIES)) { + printf("Couldn't initialize nand\n"); + } +} + +static void nand_read_page(unsigned int real_addr, int syndrome, + uint32_t *ecc_errors) +{ + uint32_t val; + int ecc_off = 0; + uint16_t ecc_mode = 0; + uint16_t rand_seed; + uint32_t page; + uint16_t column; + uint32_t oob_offset; + + switch (CONFIG_NAND_SUNXI_SPL_ECC_STRENGTH) { + case 16: + ecc_mode = 0; + ecc_off = 0x20; + break; + case 24: + ecc_mode = 1; + ecc_off = 0x2e; + break; + case 28: + ecc_mode = 2; + ecc_off = 0x32; + break; + case 32: + ecc_mode = 3; + ecc_off = 0x3c; + break; + case 40: + ecc_mode = 4; + ecc_off = 0x4a; + break; + case 48: + ecc_mode = 4; + ecc_off = 0x52; + break; + case 56: + ecc_mode = 4; + ecc_off = 0x60; + break; + case 60: + ecc_mode = 4; + ecc_off = 0x0; + break; + case 64: + ecc_mode = 4; + ecc_off = 0x0; + break; + default: + ecc_mode = 0; + ecc_off = 0; + } + + if (ecc_off == 0) { + printf("Unsupported ECC strength (%d)!\n", + CONFIG_NAND_SUNXI_SPL_ECC_STRENGTH); + return; + } + + /* clear temp_buf */ + memset(temp_buf, 0, CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE); + + /* set CMD */ + writel(NFC_SEND_CMD1 | NFC_WAIT_FLAG | NAND_CMD_RESET, + SUNXI_NFC_BASE + NFC_CMD); + + if (!check_value(SUNXI_NFC_BASE + NFC_ST, NFC_CMD_INT_FLAG, + MAX_RETRIES)) { + printf("Error while initilizing command interrupt\n"); + return; + } + + page = real_addr / CONFIG_NAND_SUNXI_SPL_PAGE_SIZE; + column = real_addr % CONFIG_NAND_SUNXI_SPL_PAGE_SIZE; + + if (syndrome) + column += (column / CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE) + * ecc_off; + + /* clear ecc status */ + writel(0, SUNXI_NFC_BASE + NFC_ECC_ST); + + /* Choose correct seed */ + if (syndrome) + rand_seed = random_seed_syndrome; + else + rand_seed = random_seed[page % 128]; + + writel((rand_seed << 16) | NFC_ECC_RANDOM_EN | NFC_ECC_EN + | NFC_ECC_PIPELINE | (ecc_mode << 12), + SUNXI_NFC_BASE + NFC_ECC_CTL); + + val = readl(SUNXI_NFC_BASE + NFC_CTL); + writel(val | NFC_CTL_RAM_METHOD, SUNXI_NFC_BASE + NFC_CTL); + + if (syndrome) { + writel(CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE, + SUNXI_NFC_BASE + NFC_SPARE_AREA); + } else { + oob_offset = CONFIG_NAND_SUNXI_SPL_PAGE_SIZE + + (column / CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE) + * ecc_off; + writel(oob_offset, SUNXI_NFC_BASE + NFC_SPARE_AREA); + } + + /* SUNXI_DMA */ + writel(0x0, SUNXI_DMA_BASE + SUNXI_DMA_CFG_REG0); /* clr dma cmd */ + /* read from REG_IO_DATA */ + writel(SUNXI_NFC_BASE + NFC_IO_DATA, + SUNXI_DMA_BASE + SUNXI_DMA_SRC_START_ADDR_REG0); + /* read to RAM */ + writel((uint32_t)temp_buf, + SUNXI_DMA_BASE + SUNXI_DMA_DEST_START_ADDRR_REG0); + writel(SUNXI_DMA_DDMA_PARA_REG_SRC_WAIT_CYC + | SUNXI_DMA_DDMA_PARA_REG_SRC_BLK_SIZE, + SUNXI_DMA_BASE + SUNXI_DMA_DDMA_PARA_REG0); + writel(CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE, + SUNXI_DMA_BASE + SUNXI_DMA_DDMA_BC_REG0); /* 1kB */ + writel(SUNXI_DMA_DDMA_CFG_REG_LOADING + | SUNXI_DMA_DDMA_CFG_REG_DMA_DEST_DATA_WIDTH_32 + | SUNXI_DMA_DDMA_CFG_REG_DMA_SRC_DATA_WIDTH_32 + | SUNXI_DMA_DDMA_CFG_REG_DMA_SRC_ADDR_MODE_IO + | SUNXI_DMA_DDMA_CFG_REG_DDMA_SRC_DRQ_TYPE_NFC, + SUNXI_DMA_BASE + SUNXI_DMA_CFG_REG0); + + writel((NFC_CMD_RNDOUTSTART << NFC_RANDOM_READ_CMD1_OFFSET) + | (NFC_CMD_RNDOUT << NFC_RANDOM_READ_CMD0_OFFSET) + | (NFC_CMD_READSTART | NFC_READ_CMD_OFFSET), SUNXI_NFC_BASE + + NFC_RCMD_SET); + writel(1, SUNXI_NFC_BASE + NFC_SECTOR_NUM); + writel(((page & 0xFFFF) << 16) | column, + SUNXI_NFC_BASE + NFC_ADDR_LOW); + writel((page >> 16) & 0xFF, SUNXI_NFC_BASE + NFC_ADDR_HIGH); + writel(NFC_SEND_CMD1 | NFC_SEND_CMD2 | NFC_DATA_TRANS | + NFC_PAGE_CMD | NFC_WAIT_FLAG | (4 << NFC_ADDR_NUM_OFFSET) | + NFC_SEND_ADR | NFC_DATA_SWAP_METHOD | (syndrome ? NFC_SEQ : 0), + SUNXI_NFC_BASE + NFC_CMD); + + if (!check_value(SUNXI_NFC_BASE + NFC_ST, (1 << 2), + MAX_RETRIES)) { + printf("Error while initializing dma interrupt\n"); + return; + } + + if (!check_value_negated(SUNXI_DMA_BASE + SUNXI_DMA_CFG_REG0, + SUNXI_DMA_DDMA_CFG_REG_LOADING, MAX_RETRIES)) { + printf("Error while waiting for dma transfer to finish\n"); + return; + } + + if (readl(SUNXI_NFC_BASE + NFC_ECC_ST)) + (*ecc_errors)++; +} + +int nand_spl_load_image(uint32_t offs, unsigned int size, void *dest) +{ + void *current_dest; + uint32_t count; + uint32_t current_count; + uint32_t ecc_errors = 0; + + memset(dest, 0x0, size); /* clean destination memory */ + for (current_dest = dest; + current_dest < (dest + size); + current_dest += CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE) { + nand_read_page(offs, offs + < CONFIG_NAND_SUNXI_SPL_SYNDROME_PARTITIONS_END, + &ecc_errors); + count = current_dest - dest; + + if (size - count > CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE) + current_count = CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE; + else + current_count = size - count; + + memcpy(current_dest, + temp_buf, + current_count); + offs += CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE; + } + return ecc_errors ? -1 : 0; +} + +void nand_deselect(void) {}