[PATCH v6 2/8] mtd: rawnand: qcom: cleanup qcom_nandc driver

From: Md Sadre Alam
Date: Tue May 21 2024 - 06:58:01 EST

cleanup qcom_nandc driver as below

- Remove register value indirection api

- Remove set_reg() api

- Convert read_loc_first & read_loc_last macro to function

- Renamed multiple variables

Signed-off-by: Md Sadre Alam <quic_mdalam@xxxxxxxxxxx>
---
Change in [v6]

* No change

Change in [v5]

* Cleand up raw nand driver.

* Removed register value indirection

* Removed set_reg() api.

Change in [v4]

* This patch was not included in [v4]

Change in [v3]

* This patch was not included in [v3]

Change in [v2]

* This patch was not included in [v2]

Change in [v1]

* This patch was not included in [v1]

drivers/mtd/nand/raw/qcom_nandc.c | 451 +++++++++++++-----------------
1 file changed, 198 insertions(+), 253 deletions(-)

diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
index b8cff9240b28..6c886a72f5e4 100644
--- a/drivers/mtd/nand/raw/qcom_nandc.c
+++ b/drivers/mtd/nand/raw/qcom_nandc.c
@@ -189,17 +189,6 @@
#define ECC_BCH_4BIT BIT(2)
#define ECC_BCH_8BIT BIT(3)

-#define nandc_set_read_loc_first(chip, reg, cw_offset, read_size, is_last_read_loc) \
-nandc_set_reg(chip, reg, \
- ((cw_offset) << READ_LOCATION_OFFSET) | \
- ((read_size) << READ_LOCATION_SIZE) | \
- ((is_last_read_loc) << READ_LOCATION_LAST))
-
-#define nandc_set_read_loc_last(chip, reg, cw_offset, read_size, is_last_read_loc) \
-nandc_set_reg(chip, reg, \
- ((cw_offset) << READ_LOCATION_OFFSET) | \
- ((read_size) << READ_LOCATION_SIZE) | \
- ((is_last_read_loc) << READ_LOCATION_LAST))
/*
* Returns the actual register address for all NAND_DEV_ registers
* (i.e. NAND_DEV_CMD0, NAND_DEV_CMD1, NAND_DEV_CMD2 and NAND_DEV_CMD_VLD)
@@ -257,8 +246,6 @@ nandc_set_reg(chip, reg, \
* @tx_sgl_start - start index in data sgl for tx.
* @rx_sgl_pos - current index in data sgl for rx.
* @rx_sgl_start - start index in data sgl for rx.
- * @wait_second_completion - wait for second DMA desc completion before making
- * the NAND transfer completion.
*/
struct bam_transaction {
struct bam_cmd_element *bam_ce;
@@ -275,7 +262,6 @@ struct bam_transaction {
u32 tx_sgl_start;
u32 rx_sgl_pos;
u32 rx_sgl_start;
- bool wait_second_completion;
};

/*
@@ -549,17 +535,17 @@ struct qcom_nand_host {
* among different NAND controllers.
* @ecc_modes - ecc mode for NAND
* @dev_cmd_reg_start - NAND_DEV_CMD_* registers starting offset
- * @is_bam - whether NAND controller is using BAM
- * @is_qpic - whether NAND CTRL is part of qpic IP
- * @qpic_v2 - flag to indicate QPIC IP version 2
+ * @supports_bam - whether NAND controller is using BAM
+ * @nandc_part_of_qpic - whether NAND controller is part of qpic IP
+ * @qpic_version2 - flag to indicate QPIC IP version 2
* @use_codeword_fixup - whether NAND has different layout for boot partitions
*/
struct qcom_nandc_props {
u32 ecc_modes;
u32 dev_cmd_reg_start;
- bool is_bam;
- bool is_qpic;
- bool qpic_v2;
+ bool supports_bam;
+ bool nandc_part_of_qpic;
+ bool qpic_version2;
bool use_codeword_fixup;
};

@@ -613,19 +599,11 @@ static void clear_bam_transaction(struct qcom_nand_controller *nandc)
{
struct bam_transaction *bam_txn = nandc->bam_txn;

- if (!nandc->props->is_bam)
+ if (!nandc->props->supports_bam)
return;

- bam_txn->bam_ce_pos = 0;
- bam_txn->bam_ce_start = 0;
- bam_txn->cmd_sgl_pos = 0;
- bam_txn->cmd_sgl_start = 0;
- bam_txn->tx_sgl_pos = 0;
- bam_txn->tx_sgl_start = 0;
- bam_txn->rx_sgl_pos = 0;
- bam_txn->rx_sgl_start = 0;
+ memset(&bam_txn->bam_ce_pos, 0, sizeof(u32) * 8);
bam_txn->last_data_desc = NULL;
- bam_txn->wait_second_completion = false;

sg_init_table(bam_txn->cmd_sgl, nandc->max_cwperpage *
QPIC_PER_CW_CMD_SGL);
@@ -640,17 +618,7 @@ static void qpic_bam_dma_done(void *data)
{
struct bam_transaction *bam_txn = data;

- /*
- * In case of data transfer with NAND, 2 callbacks will be generated.
- * One for command channel and another one for data channel.
- * If current transaction has data descriptors
- * (i.e. wait_second_completion is true), then set this to false
- * and wait for second DMA descriptor completion.
- */
- if (bam_txn->wait_second_completion)
- bam_txn->wait_second_completion = false;
- else
- complete(&bam_txn->txn_done);
+ complete(&bam_txn->txn_done);
}

static inline struct qcom_nand_host *to_qcom_nand_host(struct nand_chip *chip)
@@ -676,10 +644,9 @@ static inline void nandc_write(struct qcom_nand_controller *nandc, int offset,
iowrite32(val, nandc->base + offset);
}

-static inline void nandc_read_buffer_sync(struct qcom_nand_controller *nandc,
- bool is_cpu)
+static inline void nandc_dev_to_mem(struct qcom_nand_controller *nandc, bool is_cpu)
{
- if (!nandc->props->is_bam)
+ if (!nandc->props->supports_bam)
return;

if (is_cpu)
@@ -694,77 +661,67 @@ static inline void nandc_read_buffer_sync(struct qcom_nand_controller *nandc,
DMA_FROM_DEVICE);
}

-static __le32 *offset_to_nandc_reg(struct nandc_regs *regs, int offset)
-{
- switch (offset) {
- case NAND_FLASH_CMD:
- return &regs->cmd;
- case NAND_ADDR0:
- return &regs->addr0;
- case NAND_ADDR1:
- return &regs->addr1;
- case NAND_FLASH_CHIP_SELECT:
- return &regs->chip_sel;
- case NAND_EXEC_CMD:
- return &regs->exec;
- case NAND_FLASH_STATUS:
- return &regs->clrflashstatus;
- case NAND_DEV0_CFG0:
- return &regs->cfg0;
- case NAND_DEV0_CFG1:
- return &regs->cfg1;
- case NAND_DEV0_ECC_CFG:
- return &regs->ecc_bch_cfg;
- case NAND_READ_STATUS:
- return &regs->clrreadstatus;
- case NAND_DEV_CMD1:
- return &regs->cmd1;
- case NAND_DEV_CMD1_RESTORE:
- return &regs->orig_cmd1;
- case NAND_DEV_CMD_VLD:
- return &regs->vld;
- case NAND_DEV_CMD_VLD_RESTORE:
- return &regs->orig_vld;
- case NAND_EBI2_ECC_BUF_CFG:
- return &regs->ecc_buf_cfg;
- case NAND_READ_LOCATION_0:
- return &regs->read_location0;
- case NAND_READ_LOCATION_1:
- return &regs->read_location1;
- case NAND_READ_LOCATION_2:
- return &regs->read_location2;
- case NAND_READ_LOCATION_3:
- return &regs->read_location3;
- case NAND_READ_LOCATION_LAST_CW_0:
- return &regs->read_location_last0;
- case NAND_READ_LOCATION_LAST_CW_1:
- return &regs->read_location_last1;
- case NAND_READ_LOCATION_LAST_CW_2:
- return &regs->read_location_last2;
- case NAND_READ_LOCATION_LAST_CW_3:
- return &regs->read_location_last3;
- default:
- return NULL;
- }
+/* Helper to check the code word, whether it is last cw or not */
+static bool qcom_nandc_is_last_cw(struct nand_ecc_ctrl *ecc, int cw)
+{
+ return cw == (ecc->steps - 1);
}

-static void nandc_set_reg(struct nand_chip *chip, int offset,
- u32 val)
+/**
+ * nandc_set_read_loc_first() - to set read location first register
+ * @reg_base: location register base
+ * @cw_offset: code word offset
+ * @read_size: code word read length
+ * @is_last_read_loc: is this the last read location
+ *
+ * This function will set location register value
+ */
+static void nandc_set_read_loc_first(struct nand_chip *chip,
+ int reg_base, int cw_offset,
+ int read_size, int is_last_read_loc)
+{
+ struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
+ int val = (((cw_offset) << READ_LOCATION_OFFSET) |
+ ((read_size) << READ_LOCATION_SIZE) |
+ ((is_last_read_loc) << READ_LOCATION_LAST));
+
+ if (reg_base == NAND_READ_LOCATION_0)
+ nandc->regs->read_location0 = val;
+ else if (reg_base == NAND_READ_LOCATION_1)
+ nandc->regs->read_location1 = val;
+ else if (reg_base == NAND_READ_LOCATION_2)
+ nandc->regs->read_location2 = val;
+ else if (reg_base == NAND_READ_LOCATION_3)
+ nandc->regs->read_location3 = val;
+}
+
+/**
+ * nandc_set_read_loc_last - to set read location last register
+ * @reg_base: location register base
+ * @cw_offset: code word offset
+ * @read_size: code word read length
+ * @is_last_read_loc: is this the last read location
+ *
+ * This function will set location last register value
+ */
+static void nandc_set_read_loc_last(struct nand_chip *chip,
+ int reg_base, int cw_offset,
+ int read_size, int is_last_read_loc)
{
struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
- struct nandc_regs *regs = nandc->regs;
- __le32 *reg;
-
- reg = offset_to_nandc_reg(regs, offset);

- if (reg)
- *reg = cpu_to_le32(val);
-}
+ int val = (((cw_offset) << READ_LOCATION_OFFSET) |
+ ((read_size) << READ_LOCATION_SIZE) |
+ ((is_last_read_loc) << READ_LOCATION_LAST));

-/* Helper to check the code word, whether it is last cw or not */
-static bool qcom_nandc_is_last_cw(struct nand_ecc_ctrl *ecc, int cw)
-{
- return cw == (ecc->steps - 1);
+ if (reg_base == NAND_READ_LOCATION_LAST_CW_0)
+ nandc->regs->read_location_last0 = val;
+ else if (reg_base == NAND_READ_LOCATION_LAST_CW_1)
+ nandc->regs->read_location_last1 = val;
+ else if (reg_base == NAND_READ_LOCATION_LAST_CW_2)
+ nandc->regs->read_location_last2 = val;
+ else if (reg_base == NAND_READ_LOCATION_LAST_CW_3)
+ nandc->regs->read_location_last3 = val;
}

/* helper to configure location register values */
@@ -775,12 +732,12 @@ static void nandc_set_read_loc(struct nand_chip *chip, int cw, int reg,
struct nand_ecc_ctrl *ecc = &chip->ecc;
int reg_base = NAND_READ_LOCATION_0;

- if (nandc->props->qpic_v2 && qcom_nandc_is_last_cw(ecc, cw))
+ if (nandc->props->qpic_version2 && qcom_nandc_is_last_cw(ecc, cw))
reg_base = NAND_READ_LOCATION_LAST_CW_0;

reg_base += reg * 4;

- if (nandc->props->qpic_v2 && qcom_nandc_is_last_cw(ecc, cw))
+ if (nandc->props->qpic_version2 && qcom_nandc_is_last_cw(ecc, cw))
return nandc_set_read_loc_last(chip, reg_base, cw_offset,
read_size, is_last_read_loc);
else
@@ -792,12 +749,13 @@ static void nandc_set_read_loc(struct nand_chip *chip, int cw, int reg,
static void set_address(struct qcom_nand_host *host, u16 column, int page)
{
struct nand_chip *chip = &host->chip;
+ struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);

if (chip->options & NAND_BUSWIDTH_16)
column >>= 1;

- nandc_set_reg(chip, NAND_ADDR0, page << 16 | column);
- nandc_set_reg(chip, NAND_ADDR1, page >> 16 & 0xff);
+ nandc->regs->addr0 = page << 16 | column;
+ nandc->regs->addr1 = page >> 16 & 0xff;
}

/*
@@ -837,15 +795,17 @@ static void update_rw_regs(struct qcom_nand_host *host, int num_cw, bool read, i
ecc_bch_cfg = 1 << ECC_CFG_ECC_DISABLE;
}

- nandc_set_reg(chip, NAND_FLASH_CMD, cmd);
- nandc_set_reg(chip, NAND_DEV0_CFG0, cfg0);
- nandc_set_reg(chip, NAND_DEV0_CFG1, cfg1);
- nandc_set_reg(chip, NAND_DEV0_ECC_CFG, ecc_bch_cfg);
- if (!nandc->props->qpic_v2)
- nandc_set_reg(chip, NAND_EBI2_ECC_BUF_CFG, host->ecc_buf_cfg);
- nandc_set_reg(chip, NAND_FLASH_STATUS, host->clrflashstatus);
- nandc_set_reg(chip, NAND_READ_STATUS, host->clrreadstatus);
- nandc_set_reg(chip, NAND_EXEC_CMD, 1);
+ nandc->regs->cmd = cmd;
+ nandc->regs->cfg0 = cfg0;
+ nandc->regs->cfg1 = cfg1;
+ nandc->regs->ecc_bch_cfg = ecc_bch_cfg;
+
+ if (!nandc->props->qpic_version2)
+ nandc->regs->ecc_buf_cfg = host->ecc_buf_cfg;
+
+ nandc->regs->clrflashstatus = host->clrflashstatus;
+ nandc->regs->clrreadstatus = host->clrreadstatus;
+ nandc->regs->exec = 1;

if (read)
nandc_set_read_loc(chip, cw, 0, 0, host->use_ecc ?
@@ -1121,7 +1081,7 @@ static int read_reg_dma(struct qcom_nand_controller *nandc, int first,
if (first == NAND_DEV_CMD_VLD || first == NAND_DEV_CMD1)
first = dev_cmd_reg_addr(nandc, first);

- if (nandc->props->is_bam)
+ if (nandc->props->supports_bam)
return prep_bam_dma_desc_cmd(nandc, true, first, vaddr,
num_regs, flags);

@@ -1136,25 +1096,16 @@ static int read_reg_dma(struct qcom_nand_controller *nandc, int first,
* write_reg_dma: prepares a descriptor to write a given number of
* contiguous registers
*
+ * @vaddr: contnigeous memory from where register value will
+ * be written
* @first: offset of the first register in the contiguous block
* @num_regs: number of registers to write
* @flags: flags to control DMA descriptor preparation
*/
-static int write_reg_dma(struct qcom_nand_controller *nandc, int first,
- int num_regs, unsigned int flags)
+static int write_reg_dma(struct qcom_nand_controller *nandc, __le32 *vaddr,
+ int first, int num_regs, unsigned int flags)
{
bool flow_control = false;
- struct nandc_regs *regs = nandc->regs;
- void *vaddr;
-
- vaddr = offset_to_nandc_reg(regs, first);
-
- if (first == NAND_ERASED_CW_DETECT_CFG) {
- if (flags & NAND_ERASED_CW_SET)
- vaddr = &regs->erased_cw_detect_cfg_set;
- else
- vaddr = &regs->erased_cw_detect_cfg_clr;
- }

if (first == NAND_EXEC_CMD)
flags |= NAND_BAM_NWD;
@@ -1165,7 +1116,7 @@ static int write_reg_dma(struct qcom_nand_controller *nandc, int first,
if (first == NAND_DEV_CMD_VLD_RESTORE || first == NAND_DEV_CMD_VLD)
first = dev_cmd_reg_addr(nandc, NAND_DEV_CMD_VLD);

- if (nandc->props->is_bam)
+ if (nandc->props->supports_bam)
return prep_bam_dma_desc_cmd(nandc, false, first, vaddr,
num_regs, flags);

@@ -1188,7 +1139,7 @@ static int write_reg_dma(struct qcom_nand_controller *nandc, int first,
static int read_data_dma(struct qcom_nand_controller *nandc, int reg_off,
const u8 *vaddr, int size, unsigned int flags)
{
- if (nandc->props->is_bam)
+ if (nandc->props->supports_bam)
return prep_bam_dma_desc_data(nandc, true, vaddr, size, flags);

return prep_adm_dma_desc(nandc, true, reg_off, vaddr, size, false);
@@ -1206,7 +1157,7 @@ static int read_data_dma(struct qcom_nand_controller *nandc, int reg_off,
static int write_data_dma(struct qcom_nand_controller *nandc, int reg_off,
const u8 *vaddr, int size, unsigned int flags)
{
- if (nandc->props->is_bam)
+ if (nandc->props->supports_bam)
return prep_bam_dma_desc_data(nandc, false, vaddr, size, flags);

return prep_adm_dma_desc(nandc, false, reg_off, vaddr, size, false);
@@ -1220,13 +1171,14 @@ static void config_nand_page_read(struct nand_chip *chip)
{
struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);

- write_reg_dma(nandc, NAND_ADDR0, 2, 0);
- write_reg_dma(nandc, NAND_DEV0_CFG0, 3, 0);
- if (!nandc->props->qpic_v2)
- write_reg_dma(nandc, NAND_EBI2_ECC_BUF_CFG, 1, 0);
- write_reg_dma(nandc, NAND_ERASED_CW_DETECT_CFG, 1, 0);
- write_reg_dma(nandc, NAND_ERASED_CW_DETECT_CFG, 1,
- NAND_ERASED_CW_SET | NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, &nandc->regs->addr0, NAND_ADDR0, 2, 0);
+ write_reg_dma(nandc, &nandc->regs->cfg0, NAND_DEV0_CFG0, 3, 0);
+ if (!nandc->props->qpic_version2)
+ write_reg_dma(nandc, &nandc->regs->ecc_buf_cfg, NAND_EBI2_ECC_BUF_CFG, 1, 0);
+ write_reg_dma(nandc, &nandc->regs->erased_cw_detect_cfg_clr,
+ NAND_ERASED_CW_DETECT_CFG, 1, 0);
+ write_reg_dma(nandc, &nandc->regs->erased_cw_detect_cfg_set,
+ NAND_ERASED_CW_DETECT_CFG, 1, NAND_ERASED_CW_SET | NAND_BAM_NEXT_SGL);
}

/*
@@ -1239,16 +1191,16 @@ config_nand_cw_read(struct nand_chip *chip, bool use_ecc, int cw)
struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
struct nand_ecc_ctrl *ecc = &chip->ecc;

- int reg = NAND_READ_LOCATION_0;
+ __le32 *reg = &nandc->regs->read_location0;

- if (nandc->props->qpic_v2 && qcom_nandc_is_last_cw(ecc, cw))
- reg = NAND_READ_LOCATION_LAST_CW_0;
+ if (nandc->props->qpic_version2 && qcom_nandc_is_last_cw(ecc, cw))
+ reg = &nandc->regs->read_location_last0;

- if (nandc->props->is_bam)
- write_reg_dma(nandc, reg, 4, NAND_BAM_NEXT_SGL);
+ if (nandc->props->supports_bam)
+ write_reg_dma(nandc, reg, 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);
+ write_reg_dma(nandc, &nandc->regs->cmd, NAND_FLASH_CMD, 1, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, &nandc->regs->exec, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);

if (use_ecc) {
read_reg_dma(nandc, NAND_FLASH_STATUS, 2, 0);
@@ -1279,10 +1231,10 @@ static void config_nand_page_write(struct nand_chip *chip)
{
struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);

- write_reg_dma(nandc, NAND_ADDR0, 2, 0);
- write_reg_dma(nandc, NAND_DEV0_CFG0, 3, 0);
- if (!nandc->props->qpic_v2)
- write_reg_dma(nandc, NAND_EBI2_ECC_BUF_CFG, 1,
+ write_reg_dma(nandc, &nandc->regs->addr0, NAND_ADDR0, 2, 0);
+ write_reg_dma(nandc, &nandc->regs->cfg0, NAND_DEV0_CFG0, 3, 0);
+ if (!nandc->props->qpic_version2)
+ write_reg_dma(nandc, &nandc->regs->ecc_buf_cfg, NAND_EBI2_ECC_BUF_CFG, 1,
NAND_BAM_NEXT_SGL);
}

@@ -1294,13 +1246,13 @@ static void config_nand_cw_write(struct nand_chip *chip)
{
struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);

- write_reg_dma(nandc, NAND_FLASH_CMD, 1, NAND_BAM_NEXT_SGL);
- write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, &nandc->regs->cmd, NAND_FLASH_CMD, 1, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, &nandc->regs->exec, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);

read_reg_dma(nandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL);

- write_reg_dma(nandc, NAND_FLASH_STATUS, 1, 0);
- write_reg_dma(nandc, NAND_READ_STATUS, 1, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, &nandc->regs->clrflashstatus, NAND_FLASH_STATUS, 1, 0);
+ write_reg_dma(nandc, &nandc->regs->clrreadstatus, NAND_READ_STATUS, 1, NAND_BAM_NEXT_SGL);
}

/* helpers to submit/free our list of dma descriptors */
@@ -1311,7 +1263,7 @@ static int submit_descs(struct qcom_nand_controller *nandc)
struct bam_transaction *bam_txn = nandc->bam_txn;
int ret = 0;

- if (nandc->props->is_bam) {
+ if (nandc->props->supports_bam) {
if (bam_txn->rx_sgl_pos > bam_txn->rx_sgl_start) {
ret = prepare_bam_async_desc(nandc, nandc->rx_chan, 0);
if (ret)
@@ -1336,14 +1288,9 @@ static int submit_descs(struct qcom_nand_controller *nandc)
list_for_each_entry(desc, &nandc->desc_list, node)
cookie = dmaengine_submit(desc->dma_desc);

- if (nandc->props->is_bam) {
+ if (nandc->props->supports_bam) {
bam_txn->last_cmd_desc->callback = qpic_bam_dma_done;
bam_txn->last_cmd_desc->callback_param = bam_txn;
- if (bam_txn->last_data_desc) {
- bam_txn->last_data_desc->callback = qpic_bam_dma_done;
- bam_txn->last_data_desc->callback_param = bam_txn;
- bam_txn->wait_second_completion = true;
- }

dma_async_issue_pending(nandc->tx_chan);
dma_async_issue_pending(nandc->rx_chan);
@@ -1365,7 +1312,7 @@ static int submit_descs(struct qcom_nand_controller *nandc)
list_for_each_entry_safe(desc, n, &nandc->desc_list, node) {
list_del(&desc->node);

- if (nandc->props->is_bam)
+ if (nandc->props->supports_bam)
dma_unmap_sg(nandc->dev, desc->bam_sgl,
desc->sgl_cnt, desc->dir);
else
@@ -1382,7 +1329,7 @@ static int submit_descs(struct qcom_nand_controller *nandc)
static void clear_read_regs(struct qcom_nand_controller *nandc)
{
nandc->reg_read_pos = 0;
- nandc_read_buffer_sync(nandc, false);
+ nandc_dev_to_mem(nandc, false);
}

/*
@@ -1446,7 +1393,7 @@ static int check_flash_errors(struct qcom_nand_host *host, int cw_cnt)
struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
int i;

- nandc_read_buffer_sync(nandc, true);
+ nandc_dev_to_mem(nandc, true);

for (i = 0; i < cw_cnt; i++) {
u32 flash = le32_to_cpu(nandc->reg_read_buf[i]);
@@ -1476,7 +1423,7 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, struct nand_chip *chip,
clear_read_regs(nandc);
host->use_ecc = false;

- if (nandc->props->qpic_v2)
+ if (nandc->props->qpic_version2)
raw_cw = ecc->steps - 1;

clear_bam_transaction(nandc);
@@ -1497,7 +1444,7 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, struct nand_chip *chip,
oob_size2 = host->ecc_bytes_hw + host->spare_bytes;
}

- if (nandc->props->is_bam) {
+ if (nandc->props->supports_bam) {
nandc_set_read_loc(chip, cw, 0, read_loc, data_size1, 0);
read_loc += data_size1;

@@ -1621,7 +1568,7 @@ static int parse_read_errors(struct qcom_nand_host *host, u8 *data_buf,
u8 *data_buf_start = data_buf, *oob_buf_start = oob_buf;

buf = (struct read_stats *)nandc->reg_read_buf;
- nandc_read_buffer_sync(nandc, true);
+ nandc_dev_to_mem(nandc, true);

for (i = 0; i < ecc->steps; i++, buf++) {
u32 flash, buffer, erased_cw;
@@ -1734,7 +1681,7 @@ 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 (nandc->props->supports_bam) {
if (data_buf && oob_buf) {
nandc_set_read_loc(chip, i, 0, 0, data_size, 0);
nandc_set_read_loc(chip, i, 1, data_size,
@@ -2455,14 +2402,14 @@ static int qcom_nand_attach_chip(struct nand_chip *chip)

mtd_set_ooblayout(mtd, &qcom_nand_ooblayout_ops);
/* Free the initially allocated BAM transaction for reading the ONFI params */
- if (nandc->props->is_bam)
+ if (nandc->props->supports_bam)
free_bam_transaction(nandc);

nandc->max_cwperpage = max_t(unsigned int, nandc->max_cwperpage,
cwperpage);

/* Now allocate the BAM transaction based on updated max_cwperpage */
- if (nandc->props->is_bam) {
+ if (nandc->props->supports_bam) {
nandc->bam_txn = alloc_bam_transaction(nandc);
if (!nandc->bam_txn) {
dev_err(nandc->dev,
@@ -2522,7 +2469,7 @@ static int qcom_nand_attach_chip(struct nand_chip *chip)
| ecc_mode << ECC_MODE
| host->ecc_bytes_hw << ECC_PARITY_SIZE_BYTES_BCH;

- if (!nandc->props->qpic_v2)
+ if (!nandc->props->qpic_version2)
host->ecc_buf_cfg = 0x203 << NUM_STEPS;

host->clrflashstatus = FS_READY_BSY_N;
@@ -2556,7 +2503,7 @@ static int qcom_op_cmd_mapping(struct nand_chip *chip, u8 opcode,
cmd = OP_FETCH_ID;
break;
case NAND_CMD_PARAM:
- if (nandc->props->qpic_v2)
+ if (nandc->props->qpic_version2)
cmd = OP_PAGE_READ_ONFI_READ;
else
cmd = OP_PAGE_READ;
@@ -2663,7 +2610,7 @@ static int qcom_wait_rdy_poll(struct nand_chip *chip, unsigned int time_ms)
unsigned long start = jiffies + msecs_to_jiffies(time_ms);
u32 flash;

- nandc_read_buffer_sync(nandc, true);
+ nandc_dev_to_mem(nandc, true);

do {
flash = le32_to_cpu(nandc->reg_read_buf[0]);
@@ -2706,11 +2653,11 @@ static int qcom_read_status_exec(struct nand_chip *chip,
clear_read_regs(nandc);
clear_bam_transaction(nandc);

- nandc_set_reg(chip, NAND_FLASH_CMD, q_op.cmd_reg);
- nandc_set_reg(chip, NAND_EXEC_CMD, 1);
+ nandc->regs->cmd = q_op.cmd_reg;
+ nandc->regs->exec = 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);
+ write_reg_dma(nandc, &nandc->regs->cmd, NAND_FLASH_CMD, 1, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, &nandc->regs->exec, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);
read_reg_dma(nandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL);

ret = submit_descs(nandc);
@@ -2719,7 +2666,7 @@ static int qcom_read_status_exec(struct nand_chip *chip,
goto err_out;
}

- nandc_read_buffer_sync(nandc, true);
+ nandc_dev_to_mem(nandc, true);

for (i = 0; i < num_cw; i++) {
flash_status = le32_to_cpu(nandc->reg_read_buf[i]);
@@ -2763,16 +2710,14 @@ static int qcom_read_id_type_exec(struct nand_chip *chip, const struct nand_subo
clear_read_regs(nandc);
clear_bam_transaction(nandc);

- nandc_set_reg(chip, NAND_FLASH_CMD, q_op.cmd_reg);
- nandc_set_reg(chip, NAND_ADDR0, q_op.addr1_reg);
- nandc_set_reg(chip, NAND_ADDR1, q_op.addr2_reg);
- nandc_set_reg(chip, NAND_FLASH_CHIP_SELECT,
- nandc->props->is_bam ? 0 : DM_EN);
-
- nandc_set_reg(chip, NAND_EXEC_CMD, 1);
+ nandc->regs->cmd = q_op.cmd_reg;
+ nandc->regs->addr0 = q_op.addr1_reg;
+ nandc->regs->addr1 = q_op.addr2_reg;
+ nandc->regs->chip_sel = nandc->props->supports_bam ? 0 : DM_EN;
+ nandc->regs->exec = 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);
+ write_reg_dma(nandc, &nandc->regs->cmd, NAND_FLASH_CMD, 4, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, &nandc->regs->exec, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);

read_reg_dma(nandc, NAND_READ_ID, 1, NAND_BAM_NEXT_SGL);

@@ -2786,7 +2731,7 @@ static int qcom_read_id_type_exec(struct nand_chip *chip, const struct nand_subo
op_id = q_op.data_instr_idx;
len = nand_subop_get_data_len(subop, op_id);

- nandc_read_buffer_sync(nandc, true);
+ nandc_dev_to_mem(nandc, true);
memcpy(instr->ctx.data.buf.in, nandc->reg_read_buf, len);

err_out:
@@ -2809,11 +2754,10 @@ static int qcom_misc_cmd_type_exec(struct nand_chip *chip, const struct nand_sub
goto wait_rdy;
} else if (q_op.cmd_reg == OP_BLOCK_ERASE) {
q_op.cmd_reg |= PAGE_ACC | LAST_PAGE;
- nandc_set_reg(chip, NAND_ADDR0, q_op.addr1_reg);
- nandc_set_reg(chip, NAND_ADDR1, q_op.addr2_reg);
- nandc_set_reg(chip, NAND_DEV0_CFG0,
- host->cfg0_raw & ~(7 << CW_PER_PAGE));
- nandc_set_reg(chip, NAND_DEV0_CFG1, host->cfg1_raw);
+ nandc->regs->addr0 = q_op.addr1_reg;
+ nandc->regs->addr1 = q_op.addr2_reg;
+ nandc->regs->cfg0 = host->cfg0_raw & ~(7 << CW_PER_PAGE);
+ nandc->regs->cfg1 = host->cfg1_raw;
instrs = 3;
} else if (q_op.cmd_reg != OP_RESET_DEVICE) {
return 0;
@@ -2826,14 +2770,14 @@ static int qcom_misc_cmd_type_exec(struct nand_chip *chip, const struct nand_sub
clear_read_regs(nandc);
clear_bam_transaction(nandc);

- nandc_set_reg(chip, NAND_FLASH_CMD, q_op.cmd_reg);
- nandc_set_reg(chip, NAND_EXEC_CMD, 1);
+ nandc->regs->cmd = q_op.cmd_reg;
+ nandc->regs->exec = 1;

- write_reg_dma(nandc, NAND_FLASH_CMD, instrs, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, &nandc->regs->cmd, NAND_FLASH_CMD, instrs, NAND_BAM_NEXT_SGL);
if (q_op.cmd_reg == OP_BLOCK_ERASE)
- write_reg_dma(nandc, NAND_DEV0_CFG0, 2, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, &nandc->regs->cfg0, NAND_DEV0_CFG0, 2, NAND_BAM_NEXT_SGL);

- write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);
+ write_reg_dma(nandc, &nandc->regs->exec, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);
read_reg_dma(nandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL);

ret = submit_descs(nandc);
@@ -2872,38 +2816,38 @@ static int qcom_param_page_type_exec(struct nand_chip *chip, const struct nand_
clear_read_regs(nandc);
clear_bam_transaction(nandc);

- nandc_set_reg(chip, NAND_FLASH_CMD, q_op.cmd_reg);
-
- nandc_set_reg(chip, NAND_ADDR0, 0);
- nandc_set_reg(chip, NAND_ADDR1, 0);
- nandc_set_reg(chip, NAND_DEV0_CFG0, 0 << CW_PER_PAGE
- | 512 << UD_SIZE_BYTES
- | 5 << NUM_ADDR_CYCLES
- | 0 << SPARE_SIZE_BYTES);
- nandc_set_reg(chip, NAND_DEV0_CFG1, 7 << NAND_RECOVERY_CYCLES
- | 0 << CS_ACTIVE_BSY
- | 17 << BAD_BLOCK_BYTE_NUM
- | 1 << BAD_BLOCK_IN_SPARE_AREA
- | 2 << WR_RD_BSY_GAP
- | 0 << WIDE_FLASH
- | 1 << DEV0_CFG1_ECC_DISABLE);
- if (!nandc->props->qpic_v2)
- nandc_set_reg(chip, NAND_EBI2_ECC_BUF_CFG, 1 << ECC_CFG_ECC_DISABLE);
+ nandc->regs->cmd = q_op.cmd_reg;
+ nandc->regs->addr0 = 0;
+ nandc->regs->addr1 = 0;
+
+ nandc->regs->cfg0 = 0 << CW_PER_PAGE
+ | 512 << UD_SIZE_BYTES
+ | 5 << NUM_ADDR_CYCLES
+ | 0 << SPARE_SIZE_BYTES;
+
+ nandc->regs->cfg1 = 7 << NAND_RECOVERY_CYCLES
+ | 0 << CS_ACTIVE_BSY
+ | 17 << BAD_BLOCK_BYTE_NUM
+ | 1 << BAD_BLOCK_IN_SPARE_AREA
+ | 2 << WR_RD_BSY_GAP
+ | 0 << WIDE_FLASH
+ | 1 << DEV0_CFG1_ECC_DISABLE;
+
+ if (!nandc->props->qpic_version2)
+ nandc->regs->ecc_buf_cfg = 1 << ECC_CFG_ECC_DISABLE;

/* configure CMD1 and VLD for ONFI param probing in QPIC v1 */
- if (!nandc->props->qpic_v2) {
- nandc_set_reg(chip, NAND_DEV_CMD_VLD,
- (nandc->vld & ~READ_START_VLD));
- nandc_set_reg(chip, NAND_DEV_CMD1,
- (nandc->cmd1 & ~(0xFF << READ_ADDR))
- | NAND_CMD_PARAM << READ_ADDR);
+ if (!nandc->props->qpic_version2) {
+ nandc->regs->vld = (nandc->vld & ~READ_START_VLD);
+ nandc->regs->cmd1 = (nandc->cmd1 & ~(0xFF << READ_ADDR))
+ | NAND_CMD_PARAM << READ_ADDR;
}

- nandc_set_reg(chip, NAND_EXEC_CMD, 1);
+ nandc->regs->exec = 1;

- if (!nandc->props->qpic_v2) {
- nandc_set_reg(chip, NAND_DEV_CMD1_RESTORE, nandc->cmd1);
- nandc_set_reg(chip, NAND_DEV_CMD_VLD_RESTORE, nandc->vld);
+ if (!nandc->props->qpic_version2) {
+ nandc->regs->orig_cmd1 = nandc->cmd1;
+ nandc->regs->orig_vld = nandc->vld;
}

instr = q_op.data_instr;
@@ -2912,9 +2856,9 @@ static int qcom_param_page_type_exec(struct nand_chip *chip, const struct nand_

nandc_set_read_loc(chip, 0, 0, 0, len, 1);

- if (!nandc->props->qpic_v2) {
- write_reg_dma(nandc, NAND_DEV_CMD_VLD, 1, 0);
- write_reg_dma(nandc, NAND_DEV_CMD1, 1, NAND_BAM_NEXT_SGL);
+ if (!nandc->props->qpic_version2) {
+ write_reg_dma(nandc, &nandc->regs->vld, NAND_DEV_CMD_VLD, 1, 0);
+ write_reg_dma(nandc, &nandc->regs->cmd1, NAND_DEV_CMD1, 1, NAND_BAM_NEXT_SGL);
}

nandc->buf_count = len;
@@ -2926,9 +2870,10 @@ static int qcom_param_page_type_exec(struct nand_chip *chip, const struct nand_
nandc->buf_count, 0);

/* restore CMD1 and VLD regs */
- if (!nandc->props->qpic_v2) {
- write_reg_dma(nandc, NAND_DEV_CMD1_RESTORE, 1, 0);
- write_reg_dma(nandc, NAND_DEV_CMD_VLD_RESTORE, 1, NAND_BAM_NEXT_SGL);
+ if (!nandc->props->qpic_version2) {
+ write_reg_dma(nandc, &nandc->regs->orig_cmd1, NAND_DEV_CMD1_RESTORE, 1, 0);
+ write_reg_dma(nandc, &nandc->regs->orig_vld, NAND_DEV_CMD_VLD_RESTORE, 1,
+ NAND_BAM_NEXT_SGL);
}

ret = submit_descs(nandc);
@@ -3017,7 +2962,7 @@ static const struct nand_controller_ops qcom_nandc_ops = {

static void qcom_nandc_unalloc(struct qcom_nand_controller *nandc)
{
- if (nandc->props->is_bam) {
+ if (nandc->props->supports_bam) {
if (!dma_mapping_error(nandc->dev, nandc->reg_read_dma))
dma_unmap_single(nandc->dev, nandc->reg_read_dma,
MAX_REG_RD *
@@ -3070,7 +3015,7 @@ static int qcom_nandc_alloc(struct qcom_nand_controller *nandc)
if (!nandc->reg_read_buf)
return -ENOMEM;

- if (nandc->props->is_bam) {
+ if (nandc->props->supports_bam) {
nandc->reg_read_dma =
dma_map_single(nandc->dev, nandc->reg_read_buf,
MAX_REG_RD *
@@ -3151,15 +3096,15 @@ static int qcom_nandc_setup(struct qcom_nand_controller *nandc)
u32 nand_ctrl;

/* kill onenand */
- if (!nandc->props->is_qpic)
+ if (!nandc->props->nandc_part_of_qpic)
nandc_write(nandc, SFLASHC_BURST_CFG, 0);

- if (!nandc->props->qpic_v2)
+ if (!nandc->props->qpic_version2)
nandc_write(nandc, dev_cmd_reg_addr(nandc, NAND_DEV_CMD_VLD),
NAND_DEV_CMD_VLD_VAL);

/* enable ADM or BAM DMA */
- if (nandc->props->is_bam) {
+ if (nandc->props->supports_bam) {
nand_ctrl = nandc_read(nandc, NAND_CTRL);

/*
@@ -3176,7 +3121,7 @@ static int qcom_nandc_setup(struct qcom_nand_controller *nandc)
}

/* save the original values of these registers */
- if (!nandc->props->qpic_v2) {
+ if (!nandc->props->qpic_version2) {
nandc->cmd1 = nandc_read(nandc, dev_cmd_reg_addr(nandc, NAND_DEV_CMD1));
nandc->vld = NAND_DEV_CMD_VLD_VAL;
}
@@ -3349,7 +3294,7 @@ static int qcom_nandc_parse_dt(struct platform_device *pdev)
struct device_node *np = nandc->dev->of_node;
int ret;

- if (!nandc->props->is_bam) {
+ if (!nandc->props->supports_bam) {
ret = of_property_read_u32(np, "qcom,cmd-crci",
&nandc->cmd_crci);
if (ret) {
@@ -3474,30 +3419,30 @@ static void qcom_nandc_remove(struct platform_device *pdev)

static const struct qcom_nandc_props ipq806x_nandc_props = {
.ecc_modes = (ECC_RS_4BIT | ECC_BCH_8BIT),
- .is_bam = false,
+ .supports_bam = false,
.use_codeword_fixup = true,
.dev_cmd_reg_start = 0x0,
};

static const struct qcom_nandc_props ipq4019_nandc_props = {
.ecc_modes = (ECC_BCH_4BIT | ECC_BCH_8BIT),
- .is_bam = true,
- .is_qpic = true,
+ .supports_bam = true,
+ .nandc_part_of_qpic = true,
.dev_cmd_reg_start = 0x0,
};

static const struct qcom_nandc_props ipq8074_nandc_props = {
.ecc_modes = (ECC_BCH_4BIT | ECC_BCH_8BIT),
- .is_bam = true,
- .is_qpic = true,
+ .supports_bam = true,
+ .nandc_part_of_qpic = true,
.dev_cmd_reg_start = 0x7000,
};

static const struct qcom_nandc_props sdx55_nandc_props = {
.ecc_modes = (ECC_BCH_4BIT | ECC_BCH_8BIT),
- .is_bam = true,
- .is_qpic = true,
- .qpic_v2 = true,
+ .supports_bam = true,
+ .nandc_part_of_qpic = true,
+ .qpic_version2 = true,
.dev_cmd_reg_start = 0x7000,
};

--
2.34.1