The BAM has multiple flags to control the transfer. This patch
adds flags parameter in register and data transfer functions and
modifies all these function call with appropriate flags.
Signed-off-by: Abhishek Sahu <absahu@xxxxxxxxxxxxxx>
---
drivers/mtd/nand/qcom_nandc.c | 120 ++++++++++++++++++++++++------------------
1 file changed, 68 insertions(+), 52 deletions(-)
diff --git a/drivers/mtd/nand/qcom_nandc.c b/drivers/mtd/nand/qcom_nandc.c
index 589108b..8a6034f 100644
--- a/drivers/mtd/nand/qcom_nandc.c
+++ b/drivers/mtd/nand/qcom_nandc.c
@@ -177,6 +177,14 @@
#define QPIC_PER_CW_CMD_SGL 32
#define QPIC_PER_CW_DATA_SGL 8
+/* Flags used for BAM DMA desc preparation*/
+/* Don't set the EOT in current tx sgl */
+#define NAND_BAM_NO_EOT BIT(0)
+/* Set the NWD flag in current sgl */
+#define NAND_BAM_NWD BIT(1)
+/* Finish writing in the current sgl and start writing in another sgl */
+#define NAND_BAM_NEXT_SGL BIT(2)
+
/*
* This data type corresponds to the BAM transaction which will be used for all
* NAND transfers.
@@ -735,7 +743,7 @@ static int prep_adm_dma_desc(struct qcom_nand_controller *nandc, bool read,
* @num_regs: number of registers to read
*/
static int read_reg_dma(struct qcom_nand_controller *nandc, int first,
- int num_regs)
+ int num_regs, unsigned int flags)
{
bool flow_control = false;
void *vaddr;
@@ -759,7 +767,7 @@ static int read_reg_dma(struct qcom_nand_controller *nandc, int first,
* @num_regs: number of registers to write
*/
static int write_reg_dma(struct qcom_nand_controller *nandc, int first,
- int num_regs)
+ int num_regs, unsigned int flags)
{
bool flow_control = false;
struct nandc_regs *regs = nandc->regs;
@@ -771,6 +779,9 @@ static int write_reg_dma(struct qcom_nand_controller *nandc, int first,
if (first == NAND_FLASH_CMD)
flow_control = true;
+ if (first == NAND_EXEC_CMD)
+ flags |= NAND_BAM_NWD;
+
if (first == NAND_DEV_CMD1_RESTORE)
first = NAND_DEV_CMD1;
@@ -792,7 +803,7 @@ static int write_reg_dma(struct qcom_nand_controller *nandc, int first,
* @size: DMA transaction size in bytes
*/
static int read_data_dma(struct qcom_nand_controller *nandc, int reg_off,
- const u8 *vaddr, int size)
+ const u8 *vaddr, int size, unsigned int flags)
{
return prep_adm_dma_desc(nandc, true, reg_off, vaddr, size, false);
}
@@ -806,7 +817,7 @@ static int read_data_dma(struct qcom_nand_controller *nandc, int reg_off,
* @size: DMA transaction size in bytes
*/
static int write_data_dma(struct qcom_nand_controller *nandc, int reg_off,
- const u8 *vaddr, int size)
+ const u8 *vaddr, int size, unsigned int flags)
{
return prep_adm_dma_desc(nandc, false, reg_off, vaddr, size, false);
}
@@ -817,9 +828,9 @@ static int write_data_dma(struct qcom_nand_controller *nandc, int reg_off,
*/
static void config_nand_page_read(struct qcom_nand_controller *nandc)
{
- write_reg_dma(nandc, NAND_ADDR0, 2);
- write_reg_dma(nandc, NAND_DEV0_CFG0, 3);
- write_reg_dma(nandc, NAND_EBI2_ECC_BUF_CFG, 1);
+ write_reg_dma(nandc, NAND_ADDR0, 2, 0);
+ write_reg_dma(nandc, NAND_DEV0_CFG0, 3, 0);
+ write_reg_dma(nandc, NAND_EBI2_ECC_BUF_CFG, 1, 0);
}
/*
@@ -828,11 +839,12 @@ static void config_nand_page_read(struct qcom_nand_controller *nandc)
*/
static void config_nand_cw_read(struct qcom_nand_controller *nandc)
{
- write_reg_dma(nandc, NAND_FLASH_CMD, 1);
- write_reg_dma(nandc, NAND_EXEC_CMD, 1);
+ write_reg_dma(nandc, NAND_FLASH_CMD, 1, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);
- read_reg_dma(nandc, NAND_FLASH_STATUS, 2);
- read_reg_dma(nandc, NAND_ERASED_CW_DETECT_STATUS, 1);
+ read_reg_dma(nandc, NAND_FLASH_STATUS, 2, 0);
+ read_reg_dma(nandc, NAND_ERASED_CW_DETECT_STATUS, 1,
+ NAND_BAM_NEXT_SGL);
}
/*
@@ -851,9 +863,10 @@ static void config_nand_single_cw_page_read(struct qcom_nand_controller *nandc)
*/
static void config_nand_page_write(struct qcom_nand_controller *nandc)
{
- write_reg_dma(nandc, NAND_ADDR0, 2);
- write_reg_dma(nandc, NAND_DEV0_CFG0, 3);
- write_reg_dma(nandc, NAND_EBI2_ECC_BUF_CFG, 1);
+ write_reg_dma(nandc, NAND_ADDR0, 2, 0);
+ write_reg_dma(nandc, NAND_DEV0_CFG0, 3, 0);
+ write_reg_dma(nandc, NAND_EBI2_ECC_BUF_CFG, 1,
+ NAND_BAM_NEXT_SGL);
}
/*
@@ -862,13 +875,13 @@ static void config_nand_page_write(struct qcom_nand_controller *nandc)
*/
static void config_nand_cw_write(struct qcom_nand_controller *nandc)
{
- write_reg_dma(nandc, NAND_FLASH_CMD, 1);
- write_reg_dma(nandc, NAND_EXEC_CMD, 1);
+ write_reg_dma(nandc, NAND_FLASH_CMD, 1, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);
- read_reg_dma(nandc, NAND_FLASH_STATUS, 1);
+ read_reg_dma(nandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL);
- write_reg_dma(nandc, NAND_FLASH_STATUS, 1);
- write_reg_dma(nandc, NAND_READ_STATUS, 1);
+ write_reg_dma(nandc, NAND_FLASH_STATUS, 1, 0);
+ write_reg_dma(nandc, NAND_READ_STATUS, 1, NAND_BAM_NEXT_SGL);
}
/*
@@ -916,8 +929,8 @@ 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);
- write_reg_dma(nandc, NAND_DEV_CMD_VLD, 1);
- write_reg_dma(nandc, NAND_DEV_CMD1, 1);
+ write_reg_dma(nandc, NAND_DEV_CMD_VLD, 1, 0);
+ write_reg_dma(nandc, NAND_DEV_CMD1, 1, NAND_BAM_NEXT_SGL);
nandc->buf_count = 512;
memset(nandc->data_buffer, 0xff, nandc->buf_count);
@@ -925,11 +938,11 @@ static int nandc_param(struct qcom_nand_host *host)
config_nand_single_cw_page_read(nandc);
read_data_dma(nandc, FLASH_BUF_ACC, nandc->data_buffer,
- nandc->buf_count);
+ nandc->buf_count, 0);
/* restore CMD1 and VLD regs */
- write_reg_dma(nandc, NAND_DEV_CMD1_RESTORE, 1);
- write_reg_dma(nandc, NAND_DEV_CMD_VLD_RESTORE, 1);
+ write_reg_dma(nandc, NAND_DEV_CMD1_RESTORE, 1, 0);
+ write_reg_dma(nandc, NAND_DEV_CMD_VLD_RESTORE, 1, NAND_BAM_NEXT_SGL);
return 0;
}
@@ -951,14 +964,14 @@ static int erase_block(struct qcom_nand_host *host, int page_addr)
nandc_set_reg(nandc, NAND_FLASH_STATUS, host->clrflashstatus);
nandc_set_reg(nandc, NAND_READ_STATUS, host->clrreadstatus);
- write_reg_dma(nandc, NAND_FLASH_CMD, 3);
- write_reg_dma(nandc, NAND_DEV0_CFG0, 2);
- write_reg_dma(nandc, NAND_EXEC_CMD, 1);
+ write_reg_dma(nandc, NAND_FLASH_CMD, 3, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, NAND_DEV0_CFG0, 2, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);
- read_reg_dma(nandc, NAND_FLASH_STATUS, 1);
+ read_reg_dma(nandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL);
- write_reg_dma(nandc, NAND_FLASH_STATUS, 1);
- write_reg_dma(nandc, NAND_READ_STATUS, 1);
+ write_reg_dma(nandc, NAND_FLASH_STATUS, 1, 0);
+ write_reg_dma(nandc, NAND_READ_STATUS, 1, NAND_BAM_NEXT_SGL);
return 0;
}
@@ -978,10 +991,10 @@ static int read_id(struct qcom_nand_host *host, int column)
nandc_set_reg(nandc, NAND_FLASH_CHIP_SELECT, DM_EN);
nandc_set_reg(nandc, NAND_EXEC_CMD, 1);
- write_reg_dma(nandc, NAND_FLASH_CMD, 4);
- write_reg_dma(nandc, NAND_EXEC_CMD, 1);
+ write_reg_dma(nandc, NAND_FLASH_CMD, 4, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);
- read_reg_dma(nandc, NAND_READ_ID, 1);
+ read_reg_dma(nandc, NAND_READ_ID, 1, NAND_BAM_NEXT_SGL);
return 0;
}
@@ -995,10 +1008,10 @@ static int reset(struct qcom_nand_host *host)
nandc_set_reg(nandc, NAND_FLASH_CMD, RESET_DEVICE);
nandc_set_reg(nandc, NAND_EXEC_CMD, 1);
- write_reg_dma(nandc, NAND_FLASH_CMD, 1);
- write_reg_dma(nandc, NAND_EXEC_CMD, 1);
+ write_reg_dma(nandc, NAND_FLASH_CMD, 1, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);
- read_reg_dma(nandc, NAND_FLASH_STATUS, 1);
+ read_reg_dma(nandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL);
return 0;
}
@@ -1395,7 +1408,7 @@ static int read_page_ecc(struct qcom_nand_host *host, u8 *data_buf,
if (data_buf)
read_data_dma(nandc, FLASH_BUF_ACC, data_buf,
- data_size);
+ data_size, 0);
/*
* when ecc is enabled, the controller doesn't read the real
@@ -1411,7 +1424,7 @@ static int read_page_ecc(struct qcom_nand_host *host, u8 *data_buf,
*oob_buf++ = 0xff;
read_data_dma(nandc, FLASH_BUF_ACC + data_size,
- oob_buf, oob_size);
+ oob_buf, oob_size, 0);
}
if (data_buf)
@@ -1453,7 +1466,7 @@ static int copy_last_cw(struct qcom_nand_host *host, int page)
config_nand_single_cw_page_read(nandc);
- read_data_dma(nandc, FLASH_BUF_ACC, nandc->data_buffer, size);
+ read_data_dma(nandc, FLASH_BUF_ACC, nandc->data_buffer, size, 0);
ret = submit_descs(nandc);
if (ret)
@@ -1522,19 +1535,19 @@ static int qcom_nandc_read_page_raw(struct mtd_info *mtd,
config_nand_cw_read(nandc);
- read_data_dma(nandc, reg_off, data_buf, data_size1);
+ read_data_dma(nandc, reg_off, data_buf, data_size1, 0);
reg_off += data_size1;
data_buf += data_size1;
- read_data_dma(nandc, reg_off, oob_buf, oob_size1);
+ read_data_dma(nandc, reg_off, oob_buf, oob_size1, 0);
reg_off += oob_size1;
oob_buf += oob_size1;
- read_data_dma(nandc, reg_off, data_buf, data_size2);
+ read_data_dma(nandc, reg_off, data_buf, data_size2, 0);
reg_off += data_size2;
data_buf += data_size2;
- read_data_dma(nandc, reg_off, oob_buf, oob_size2);
+ read_data_dma(nandc, reg_off, oob_buf, oob_size2, 0);
oob_buf += oob_size2;
}
@@ -1601,7 +1614,8 @@ static int qcom_nandc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
}
- write_data_dma(nandc, FLASH_BUF_ACC, data_buf, data_size);
+ write_data_dma(nandc, FLASH_BUF_ACC, data_buf, data_size,
+ i == (ecc->steps - 1) ? NAND_BAM_NO_EOT : 0);
/*
* when ECC is enabled, we don't really need to write anything
@@ -1614,7 +1628,7 @@ static int qcom_nandc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
oob_buf += host->bbm_size;
write_data_dma(nandc, FLASH_BUF_ACC + data_size,
- oob_buf, oob_size);
+ oob_buf, oob_size, 0);
}
config_nand_cw_write(nandc);
@@ -1669,19 +1683,20 @@ static int qcom_nandc_write_page_raw(struct mtd_info *mtd,
oob_size2 = host->ecc_bytes_hw + host->spare_bytes;
}
- write_data_dma(nandc, reg_off, data_buf, data_size1);
+ write_data_dma(nandc, reg_off, data_buf, data_size1,
+ NAND_BAM_NO_EOT);
reg_off += data_size1;
data_buf += data_size1;
- write_data_dma(nandc, reg_off, oob_buf, oob_size1);
+ write_data_dma(nandc, reg_off, oob_buf, oob_size1, 0);
reg_off += oob_size1;
oob_buf += oob_size1;
- write_data_dma(nandc, reg_off, data_buf, data_size2);
+ write_data_dma(nandc, reg_off, data_buf, data_size2, 0);
reg_off += data_size2;
data_buf += data_size2;
- write_data_dma(nandc, reg_off, oob_buf, oob_size2);
+ write_data_dma(nandc, reg_off, oob_buf, oob_size2, 0);
oob_buf += oob_size2;
config_nand_cw_write(nandc);
@@ -1735,8 +1750,8 @@ static int qcom_nandc_write_oob(struct mtd_info *mtd, struct nand_chip *chip,
update_rw_regs(host, 1, false);
config_nand_page_write(nandc);
- write_data_dma(nandc, FLASH_BUF_ACC, nandc->data_buffer,
- data_size + oob_size);
+ write_data_dma(nandc, FLASH_BUF_ACC,
+ nandc->data_buffer, data_size + oob_size, 0);
config_nand_cw_write(nandc);
ret = submit_descs(nandc);
@@ -1820,7 +1835,8 @@ static int qcom_nandc_block_markbad(struct mtd_info *mtd, loff_t ofs)
update_rw_regs(host, 1, false);
config_nand_page_write(nandc);
- write_data_dma(nandc, FLASH_BUF_ACC, nandc->data_buffer, host->cw_size);
+ write_data_dma(nandc, FLASH_BUF_ACC,
+ nandc->data_buffer, host->cw_size, 0);
config_nand_cw_write(nandc);
ret = submit_descs(nandc);
--
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