| Message ID | 1590737775-4798-6-git-send-email-masonccyang@mxic.com.tw |
|---|---|
| State | Changes Requested |
| Delegated to: | Ambarus Tudor |
| Headers | show |
| Series | mtd: spi-nor: add xSPI Octal DTR support | expand |
+ YC Lin in loop, -- > > Subject > > [PATCH v4 5/7] mtd: spi-nor: core: execute command sequences to change octal DTR mode > > Execute command sequences to change octal DTR mode. > > Signed-off-by: Mason Yang <masonccyang@mxic.com.tw> > --- CONFIDENTIALITY NOTE: This e-mail and any attachments may contain confidential information and/or personal data, which is protected by applicable laws. Please be reminded that duplication, disclosure, distribution, or use of this e-mail (and/or its attachments) or any part thereof is prohibited. If you receive this e-mail in error, please notify us immediately and delete this mail as well as its attachment(s) from your system. In addition, please be informed that collection, processing, and/or use of personal data is prohibited unless expressly permitted by personal data protection laws. Thank you for your attention and cooperation. Macronix International Co., Ltd. ===================================================================== ============================================================================ CONFIDENTIALITY NOTE: This e-mail and any attachments may contain confidential information and/or personal data, which is protected by applicable laws. Please be reminded that duplication, disclosure, distribution, or use of this e-mail (and/or its attachments) or any part thereof is prohibited. If you receive this e-mail in error, please notify us immediately and delete this mail as well as its attachment(s) from your system. In addition, please be informed that collection, processing, and/or use of personal data is prohibited unless expressly permitted by personal data protection laws. Thank you for your attention and cooperation. Macronix International Co., Ltd. =====================================================================
diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index fed6236..c8cd0c6 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -347,6 +347,77 @@ int spi_nor_write_cr2(struct spi_nor *nor, u32 addr, u8 *cr2) } /** + * spi_nor_cmd_seq_octal_dtr() - command sequences to change to octal DTR mode + * @nor: pointer to 'struct spi_nor'. + * @enable: enable Octal DTR. + * + * Return: 0 on success, -errno otherwise. + */ +int spi_nor_cmd_seq_octal_dtr(struct spi_nor *nor, bool enable) +{ + struct spi_nor_flash_parameter *p = nor->params; + struct cmd_seq_octal_dtr *cs = p->cmd_seq; + int i, ret; + struct spi_mem_op op; + + if (!nor->spimem || !p->cmd_seq[0].len) + return -ENOTSUPP; + + if (!enable) + return 0; + + for (i = 0; i < CMD_SEQ_NUM; i++) { + switch (p->cmd_seq[i].len) { + case 1: + op = (struct spi_mem_op) + SPI_MEM_OP(SPI_MEM_OP_CMD(cs[i].opcode, 1), + SPI_MEM_OP_NO_ADDR, + SPI_MEM_OP_NO_DUMMY, + SPI_MEM_OP_NO_DATA); + + ret = spi_mem_exec_op(nor->spimem, &op); + if (ret) + return ret; + break; + + case 3: + op = (struct spi_mem_op) + SPI_MEM_OP(SPI_MEM_OP_CMD(cs[i].opcode, 1), + SPI_MEM_OP_ADDR(1, cs[i].addr, 1), + SPI_MEM_OP_NO_DUMMY, + SPI_MEM_OP_DATA_OUT(1, + &cs[i].data, 1)); + + ret = spi_mem_exec_op(nor->spimem, &op); + if (ret) + return ret; + break; + + case 6: + op = (struct spi_mem_op) + SPI_MEM_OP(SPI_MEM_OP_CMD(cs[i].opcode, 1), + SPI_MEM_OP_ADDR(4, cs[i].addr, 1), + SPI_MEM_OP_NO_DUMMY, + SPI_MEM_OP_DATA_OUT(1, + &cs[i].data, 1)); + + ret = spi_mem_exec_op(nor->spimem, &op); + if (ret) + return ret; + break; + + default: + dev_err(nor->dev, + "Error %d sequences to Octal DTR\n", + p->cmd_seq[i].len); + break; + } + } + + return ret; +} + +/** * spi_nor_read_sr() - Read the Status Register. * @nor: pointer to 'struct spi_nor'. * @sr: pointer to a DMA-able buffer where the value of the diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h index 0eb07ca..e4cf20a 100644 --- a/drivers/mtd/spi-nor/core.h +++ b/drivers/mtd/spi-nor/core.h @@ -436,6 +436,7 @@ struct spi_nor_manufacturer { int spi_nor_write_disable(struct spi_nor *nor); int spi_nor_read_cr2(struct spi_nor *nor, u32 addr, u8 *cr2); int spi_nor_write_cr2(struct spi_nor *nor, u32 addr, u8 *cr2); +int spi_nor_cmd_seq_octal_dtr(struct spi_nor *nor, bool enable); int spi_nor_set_4byte_addr_mode(struct spi_nor *nor, bool enable); int spi_nor_write_ear(struct spi_nor *nor, u8 ear); int spi_nor_wait_till_ready(struct spi_nor *nor);
Execute command sequences to change octal DTR mode. Signed-off-by: Mason Yang <masonccyang@mxic.com.tw> --- drivers/mtd/spi-nor/core.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++ drivers/mtd/spi-nor/core.h | 1 + 2 files changed, 72 insertions(+)