diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/qcom_nandc.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/mtd/nand/qcom_nandc.c b/drivers/mtd/nand/qcom_nandc.c index c9226172c3a3..9d55e8e30ea6 100644 --- a/drivers/mtd/nand/qcom_nandc.c +++ b/drivers/mtd/nand/qcom_nandc.c @@ -53,6 +53,8 @@ #define NAND_VERSION 0xf08 #define NAND_READ_LOCATION_0 0xf20 #define NAND_READ_LOCATION_1 0xf24 +#define NAND_READ_LOCATION_2 0xf28 +#define NAND_READ_LOCATION_3 0xf2c /* dummy register offsets, used by write_reg_dma */ #define NAND_DEV_CMD1_RESTORE 0xdead @@ -135,6 +137,11 @@ #define ERASED_PAGE (PAGE_ALL_ERASED | PAGE_ERASED) #define ERASED_CW (CODEWORD_ALL_ERASED | CODEWORD_ERASED) +/* NAND_READ_LOCATION_n bits */ +#define READ_LOCATION_OFFSET 0 +#define READ_LOCATION_SIZE 16 +#define READ_LOCATION_LAST 31 + /* Version Mask */ #define NAND_VERSION_MAJOR_MASK 0xf0000000 #define NAND_VERSION_MAJOR_SHIFT 28 @@ -177,6 +184,12 @@ #define ECC_BCH_4BIT BIT(2) #define ECC_BCH_8BIT BIT(3) +#define nandc_set_read_loc(nandc, reg, offset, size, is_last) \ +nandc_set_reg(nandc, NAND_READ_LOCATION_##reg, \ + ((offset) << READ_LOCATION_OFFSET) | \ + ((size) << READ_LOCATION_SIZE) | \ + ((is_last) << READ_LOCATION_LAST)) + #define QPIC_PER_CW_CMD_SGL 32 #define QPIC_PER_CW_DATA_SGL 8 @@ -263,6 +276,11 @@ struct nandc_regs { __le32 orig_vld; __le32 ecc_buf_cfg; + __le32 read_location0; + __le32 read_location1; + __le32 read_location2; + __le32 read_location3; + }; /* @@ -519,6 +537,14 @@ static __le32 *offset_to_nandc_reg(struct nandc_regs *regs, int offset) return ®s->orig_vld; case NAND_EBI2_ECC_BUF_CFG: return ®s->ecc_buf_cfg; + case NAND_READ_LOCATION_0: + return ®s->read_location0; + case NAND_READ_LOCATION_1: + return ®s->read_location1; + case NAND_READ_LOCATION_2: + return ®s->read_location2; + case NAND_READ_LOCATION_3: + return ®s->read_location3; default: return NULL; } @@ -593,6 +619,10 @@ static void update_rw_regs(struct qcom_nand_host *host, int num_cw, bool read) nandc_set_reg(nandc, NAND_FLASH_STATUS, host->clrflashstatus); nandc_set_reg(nandc, NAND_READ_STATUS, host->clrreadstatus); nandc_set_reg(nandc, NAND_EXEC_CMD, 1); + + if (read) + nandc_set_read_loc(nandc, 0, 0, host->use_ecc ? + host->cw_data : host->cw_size, 1); } /* @@ -842,6 +872,10 @@ static void config_nand_page_read(struct qcom_nand_controller *nandc) */ static void config_nand_cw_read(struct qcom_nand_controller *nandc) { + if (nandc->props->is_bam) + write_reg_dma(nandc, NAND_READ_LOCATION_0, 4, + NAND_BAM_NEXT_SGL); + write_reg_dma(nandc, NAND_FLASH_CMD, 1, NAND_BAM_NEXT_SGL); write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL); @@ -930,6 +964,7 @@ static int nandc_param(struct qcom_nand_host *host) nandc_set_reg(nandc, NAND_DEV_CMD1_RESTORE, nandc->cmd1); nandc_set_reg(nandc, NAND_DEV_CMD_VLD_RESTORE, nandc->vld); + nandc_set_read_loc(nandc, 0, 0, 512, 1); write_reg_dma(nandc, NAND_DEV_CMD_VLD, 1, 0); write_reg_dma(nandc, NAND_DEV_CMD1, 1, NAND_BAM_NEXT_SGL); @@ -1405,6 +1440,19 @@ static int read_page_ecc(struct qcom_nand_host *host, u8 *data_buf, oob_size = host->ecc_bytes_hw + host->spare_bytes; } + if (nandc->props->is_bam) { + if (data_buf && oob_buf) { + nandc_set_read_loc(nandc, 0, 0, data_size, 0); + nandc_set_read_loc(nandc, 1, data_size, + oob_size, 1); + } else if (data_buf) { + nandc_set_read_loc(nandc, 0, 0, data_size, 1); + } else { + nandc_set_read_loc(nandc, 0, data_size, + oob_size, 1); + } + } + config_nand_cw_read(nandc); if (data_buf) @@ -1509,6 +1557,7 @@ static int qcom_nandc_read_page_raw(struct mtd_info *mtd, u8 *data_buf, *oob_buf; struct nand_ecc_ctrl *ecc = &chip->ecc; int i, ret; + int read_loc; data_buf = buf; oob_buf = chip->oob_poi; @@ -1534,6 +1583,20 @@ static int qcom_nandc_read_page_raw(struct mtd_info *mtd, oob_size2 = host->ecc_bytes_hw + host->spare_bytes; } + if (nandc->props->is_bam) { + read_loc = 0; + nandc_set_read_loc(nandc, 0, read_loc, data_size1, 0); + read_loc += data_size1; + + nandc_set_read_loc(nandc, 1, read_loc, oob_size1, 0); + read_loc += oob_size1; + + nandc_set_read_loc(nandc, 2, read_loc, data_size2, 0); + read_loc += data_size2; + + nandc_set_read_loc(nandc, 3, read_loc, oob_size2, 1); + } + config_nand_cw_read(nandc); read_data_dma(nandc, reg_off, data_buf, data_size1, 0); |