#define NFC_ROW_AUTO_INC (1 << 27)
#define NFC_SEND_CMD3 (1 << 28)
#define NFC_SEND_CMD4 (1 << 29)
+#define NFC_RAW_CMD (0 << 30)
+#define NFC_PAGE_CMD (2 << 30)
#define NFC_ST_CMD_INT_FLAG (1 << 1)
#define NFC_ST_DMA_INT_FLAG (1 << 2)
#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_PARA_REG_SRC_WAIT_CYC (0x0F << 0)
#define SUNXI_DMA_DDMA_PARA_REG_SRC_BLK_SIZE (0x7F << 8)
+struct nfc_config {
+ int page_size;
+ int ecc_strength;
+ int ecc_size;
+ int addr_cycles;
+ int nseeds;
+ bool randomize;
+};
+
/* minimal "boot0" style NAND support for Allwinner A20 */
/* random seed used by linux */
writel(NFC_ST_CMD_INT_FLAG, SUNXI_NFC_BASE + NFC_ST);
}
-static int nand_read_page(int page_size, int ecc_strength, int ecc_page_size,
- int addr_cycles, uint32_t real_addr, dma_addr_t dst)
+static void nand_apply_config(const struct nfc_config *conf)
{
- uint32_t val;
- int i, ecc_off = 0;
- uint16_t ecc_mode = 0;
- uint16_t rand_seed;
- uint32_t page;
- uint16_t column;
- static const u8 strengths[] = { 16, 24, 28, 32, 40, 48, 56, 60, 64 };
+ u32 val;
- for (i = 0; i < ARRAY_SIZE(strengths); i++) {
- if (ecc_strength == strengths[i]) {
- ecc_mode = i;
- break;
- }
+ val = readl(SUNXI_NFC_BASE + NFC_CTL);
+ val &= ~NFC_CTL_PAGE_SIZE_MASK;
+ writel(val | NFC_CTL_RAM_METHOD | NFC_CTL_PAGE_SIZE(conf->page_size),
+ SUNXI_NFC_BASE + NFC_CTL);
+ writel(conf->ecc_size, SUNXI_NFC_BASE + NFC_CNT);
+ writel(conf->page_size, SUNXI_NFC_BASE + NFC_SPARE_AREA);
+}
+
+static int nand_load_page(const struct nfc_config *conf, u32 offs)
+{
+ int page = offs / conf->page_size;
+
+ 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(((page & 0xFFFF) << 16), SUNXI_NFC_BASE + NFC_ADDR_LOW);
+ writel((page >> 16) & 0xFF, SUNXI_NFC_BASE + NFC_ADDR_HIGH);
+ writel(NFC_ST_CMD_INT_FLAG, SUNXI_NFC_BASE + NFC_ST);
+ writel(NFC_SEND_CMD1 | NFC_SEND_CMD2 | NFC_RAW_CMD | NFC_WAIT_FLAG |
+ ((conf->addr_cycles - 1) << NFC_ADDR_NUM_OFFSET) | NFC_SEND_ADR,
+ SUNXI_NFC_BASE + NFC_CMD);
+
+ if (!check_value(SUNXI_NFC_BASE + NFC_ST, NFC_ST_CMD_INT_FLAG,
+ DEFAULT_TIMEOUT_US)) {
+ printf("Error while initializing dma interrupt\n");
+ return -EIO;
}
- /* HW ECC always request ECC bytes for 1024 bytes blocks */
- ecc_off = DIV_ROUND_UP(ecc_strength * fls(8 * 1024), 8);
- /* HW ECC always work with even numbers of ECC bytes */
- ecc_off += (ecc_off & 1);
- ecc_off += 4; /* prepad */
+ return 0;
+}
+
+static int nand_read_page(const struct nfc_config *conf, u32 offs,
+ void *dest, int len)
+{
+ dma_addr_t dst = (dma_addr_t)dest;
+ int nsectors = len / conf->ecc_size;
+ u16 rand_seed;
+ u32 val;
+ int page;
+
+ page = offs / conf->page_size;
- page = real_addr / page_size;
- column = real_addr % page_size;
+ if (offs % conf->page_size || len % conf->ecc_size ||
+ len > conf->page_size || len < 0)
+ return -EINVAL;
/* clear ecc status */
writel(0, SUNXI_NFC_BASE + NFC_ECC_ST);
/* Choose correct seed */
- rand_seed = random_seed[page % 128];
+ rand_seed = random_seed[page % conf->nseeds];
- writel((rand_seed << 16) | NFC_ECC_RANDOM_EN | NFC_ECC_EN
- | NFC_ECC_PIPELINE | (ecc_mode << 12),
+ writel((rand_seed << 16) | (conf->ecc_strength << 12) |
+ (conf->randomize ? NFC_ECC_RANDOM_EN : 0) |
+ (conf->ecc_size == 512 ? NFC_ECC_BLOCK_SIZE : 0) |
+ NFC_ECC_EN | NFC_ECC_PIPELINE | NFC_ECC_EXCEPTION,
SUNXI_NFC_BASE + NFC_ECC_CTL);
- val = readl(SUNXI_NFC_BASE + NFC_CTL);
- writel(val | NFC_CTL_RAM_METHOD, SUNXI_NFC_BASE + NFC_CTL);
-
- writel(page_size + (column / ecc_page_size) * ecc_off,
- SUNXI_NFC_BASE + NFC_SPARE_AREA);
-
- flush_dcache_range(dst, ALIGN(dst + ecc_page_size, ARCH_DMA_MINALIGN));
+ flush_dcache_range(dst, ALIGN(dst + conf->ecc_size, ARCH_DMA_MINALIGN));
/* SUNXI_DMA */
writel(0x0, SUNXI_DMA_BASE + SUNXI_DMA_CFG_REG0); /* clr dma cmd */
SUNXI_DMA_BASE + SUNXI_DMA_SRC_START_ADDR_REG0);
/* read to RAM */
writel(dst, 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(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_DDMA_DST_DRQ_TYPE_DRAM
- | 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(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(len, SUNXI_DMA_BASE + SUNXI_DMA_DDMA_BC_REG0);
+ writel(SUNXI_DMA_DDMA_CFG_REG_LOADING |
+ SUNXI_DMA_DDMA_CFG_REG_DMA_DEST_DATA_WIDTH_32 |
+ SUNXI_DMA_DDMA_CFG_REG_DDMA_DST_DRQ_TYPE_DRAM |
+ 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(nsectors, SUNXI_NFC_BASE + NFC_SECTOR_NUM);
writel(NFC_ST_DMA_INT_FLAG, SUNXI_NFC_BASE + NFC_ST);
- writel(NFC_SEND_CMD1 | NFC_SEND_CMD2 | NFC_DATA_TRANS |
- NFC_PAGE_CMD | NFC_WAIT_FLAG |
- ((addr_cycles - 1) << NFC_ADDR_NUM_OFFSET) |
- NFC_SEND_ADR | NFC_DATA_SWAP_METHOD,
- SUNXI_NFC_BASE + NFC_CMD);
+ writel(NFC_DATA_TRANS | NFC_PAGE_CMD | NFC_DATA_SWAP_METHOD,
+ SUNXI_NFC_BASE + NFC_CMD);
if (!check_value(SUNXI_NFC_BASE + NFC_ST, NFC_ST_DMA_INT_FLAG,
DEFAULT_TIMEOUT_US)) {
printf("Error while initializing dma interrupt\n");
- return -1;
+ return -EIO;
}
writel(NFC_ST_DMA_INT_FLAG, SUNXI_NFC_BASE + NFC_ST);
SUNXI_DMA_DDMA_CFG_REG_LOADING,
DEFAULT_TIMEOUT_US)) {
printf("Error while waiting for dma transfer to finish\n");
- return -1;
+ return -EIO;
}
invalidate_dcache_range(dst,
- ALIGN(dst + ecc_page_size, ARCH_DMA_MINALIGN));
+ ALIGN(dst + conf->ecc_size, ARCH_DMA_MINALIGN));
- if (readl(SUNXI_NFC_BASE + NFC_ECC_ST))
- return -1;
+ val = readl(SUNXI_NFC_BASE + NFC_ECC_ST);
- return 0;
+ /* ECC error detected. */
+ if (val & 0xffff)
+ return -EIO;
+
+ /*
+ * Return 1 if the page is empty.
+ * We consider the page as empty if the first ECC block is marked
+ * empty.
+ */
+ return (val & 0x10000) ? 1 : 0;
}
static int nand_read_ecc(int page_size, int ecc_strength, int ecc_page_size,
int addr_cycles, uint32_t offs, uint32_t size, void *dest)
{
void *end = dest + size;
+ static const u8 strengths[] = { 16, 24, 28, 32, 40, 48, 56, 60, 64 };
+ struct nfc_config conf = {
+ .page_size = page_size,
+ .ecc_size = ecc_page_size,
+ .addr_cycles = addr_cycles,
+ .nseeds = ARRAY_SIZE(random_seed),
+ .randomize = true,
+ };
+ int i;
- clrsetbits_le32(SUNXI_NFC_BASE + NFC_CTL, NFC_CTL_PAGE_SIZE_MASK,
- NFC_CTL_PAGE_SIZE(page_size));
+ for (i = 0; i < ARRAY_SIZE(strengths); i++) {
+ if (ecc_strength == strengths[i]) {
+ conf.ecc_strength = i;
+ break;
+ }
+ }
+
+
+ nand_apply_config(&conf);
+
+ for ( ;dest < end; dest += ecc_page_size, offs += page_size) {
+ if (nand_load_page(&conf, offs))
+ return -1;
- for ( ;dest < end; dest += ecc_page_size, offs += ecc_page_size) {
- if (nand_read_page(page_size, ecc_strength, ecc_page_size,
- addr_cycles, offs, (dma_addr_t)dest))
+ if (nand_read_page(&conf, offs, dest, page_size))
return -1;
}
projects / platform / kernel / u-boot.git / commitdiff