[PATCH v4 2/5] drivers: mtd: nand: Add qpic_common API file

Md Sadre Alam
2024-03-08T09:18:30Z

Add qpic_common.c file which hold all the common
qpic APIs which will be used by both qpic raw nand
driver and qpic spi nand driver.

Co-developed-by: Sricharan Ramabadhran <quic_srichara@quicinc.com>
Signed-off-by: Sricharan Ramabadhran <quic_srichara@quicinc.com>
Co-developed-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Signed-off-by: Md Sadre Alam <quic_mdalam@quicinc.com>
---
Change in [v4]

* Added kernel doc for all common api as per kernel doc
standard

* Added QPIC_COMMON config to build qpic_common.c

Change in [v3]

* Added original copy right

* Removed all EXPORT_SYMBOL()

* Made this common api file more generic

* Added qcom_ prefix to all api in this file

* Removed devm_kfree and added kfree

* Moved to_qcom_nand_controller() to raw nand driver
since it was only used by raw nand driver, so not needed
as common

* Added kernel doc for all api

* made reverse tree of variable declaration in
prep_adm_dma_desc() function

* Added if(!ret) condition in prep_adm_dma_desc()
function

* Initialized slave_conf as 0 while declaration

Change in [v2]

* Posted initial support for common api file

Change in [v1]

* Posted as RFC patch for design review

drivers/mtd/nand/Kconfig | 7 +
drivers/mtd/nand/Makefile | 1 +
drivers/mtd/nand/qpic_common.c | 826 +++++++++++++++
drivers/mtd/nand/raw/Kconfig | 1 +
drivers/mtd/nand/raw/qcom_nandc.c | 1440 +++-----------------------
include/linux/mtd/nand-qpic-common.h | 486 +++++++++
6 files changed, 1456 insertions(+), 1305 deletions(-)
create mode 100644 drivers/mtd/nand/qpic_common.c
create mode 100644 include/linux/mtd/nand-qpic-common.h

diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 5b0c2c95f10c..609072c5fd9e 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -61,6 +61,13 @@ config MTD_NAND_ECC_MEDIATEK
help
This enables support for the hardware ECC engine from Mediatek.

+config QPIC_COMMON
+ tristate "QPIC common api file"
+ depends on ARCH_QCOM || COMPILE_TEST
+ help
+ This enables support for common api for qpic nand controller.
+ common apis will be used by both raw nand driver and serial nand
+ driver.
endmenu

endmenu
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 19e1291ac4d5..c0c1f8bd0220 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -3,6 +3,7 @@
nandcore-objs := core.o bbt.o
obj-$(CONFIG_MTD_NAND_CORE) += nandcore.o
obj-$(CONFIG_MTD_NAND_ECC_MEDIATEK) += ecc-mtk.o
+obj-$(CONFIG_QPIC_COMMON) += qpic_common.o

obj-y += onenand/
obj-y += raw/
diff --git a/drivers/mtd/nand/qpic_common.c b/drivers/mtd/nand/qpic_common.c
new file mode 100644
index 000000000000..5b7c0d119d9a
--- /dev/null
+++ b/drivers/mtd/nand/qpic_common.c
@@ -0,0 +1,826 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ */
+#include <linux/mtd/nand-qpic-common.h>
+
+
+/**
+ * qcom_free_bam_transaction() - Frees the BAM transaction memory
+ * @nandc: qpic nand controller
+ *
+ * This function frees the bam transaction memory
+ */
+void qcom_free_bam_transaction(struct qcom_nand_controller *nandc)
+{
+ struct bam_transaction *bam_txn = nandc->bam_txn;
+
+ kfree(bam_txn);
+}
+
+/**
+ * qcom_clear_read_regs() - reset the read register buffer
+ * @nandc: qpic nand controller
+ *
+ * This function reset the register read buffer for next NAND operation
+ */
+void qcom_clear_read_regs(struct qcom_nand_controller *nandc)
+{
+ nandc->reg_read_pos = 0;
+ qcom_nandc_read_buffer_sync(nandc, false);
+}
+
+/**
+ * qcom_qpic_bam_dma_done() - Callback for DMA descriptor completion
+ * @data: data pointer
+ *
+ * This function is a callback for DMA descriptor completion
+ */
+void qcom_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);
+}
+
+/**
+ * qcom_nandc_read_buffer_sync() - Check for dma sync for cpu or device
+ * @nandc: qpic nand controller
+ * @is_cpu: cpu or Device
+ *
+ * This function will check for dma sync for cpu or device
+ */
+void qcom_nandc_read_buffer_sync(struct qcom_nand_controller *nandc,
+ bool is_cpu)
+{
+ if (!nandc->props->is_bam)
+ return;
+
+ if (is_cpu)
+ dma_sync_single_for_cpu(nandc->dev, nandc->reg_read_dma,
+ MAX_REG_RD *
+ sizeof(*nandc->reg_read_buf),
+ DMA_FROM_DEVICE);
+ else
+ dma_sync_single_for_device(nandc->dev, nandc->reg_read_dma,
+ MAX_REG_RD *
+ sizeof(*nandc->reg_read_buf),
+ DMA_FROM_DEVICE);
+}
+
+/**
+ * qcom_offset_to_nandc_reg() - Get the actual offset
+ * @regs: pointer to nandc_reg structure
+ * @offset: register offset
+ *
+ * This function will reurn the actual offset for qpic controller register
+ */
+__le32 *qcom_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;
+ }
+}
+
+/**
+ * qcom_prep_adm_dma_desc() - Prepare descriptor for adma
+ * @nandc: qpic nand controller
+ * @read: read or write type
+ * @reg_off: offset within the controller's data buffer
+ * @vaddr: virtual address of the buffer we want to write to
+ * @size: adm dma transaction size in bytes
+ * @flow_control: flow controller
+ *
+ * This function will prepare descriptor for adma
+ */
+int qcom_prep_adm_dma_desc(struct qcom_nand_controller *nandc, bool read,
+ int reg_off, const void *vaddr, int size,
+ bool flow_control)
+{
+ struct qcom_adm_peripheral_config periph_conf = {};
+ struct dma_async_tx_descriptor *dma_desc;
+ struct dma_slave_config slave_conf = {0};
+ enum dma_transfer_direction dir_eng;
+ struct scatterlist *sgl;
+ struct desc_info *desc;
+ int ret;
+
+ desc = kzalloc(sizeof(*desc), GFP_KERNEL);
+ if (!desc)
+ return -ENOMEM;
+
+ sgl = &desc->adm_sgl;
+
+ sg_init_one(sgl, vaddr, size);
+
+ if (read) {
+ dir_eng = DMA_DEV_TO_MEM;
+ desc->dir = DMA_FROM_DEVICE;
+ } else {
+ dir_eng = DMA_MEM_TO_DEV;
+ desc->dir = DMA_TO_DEVICE;
+ }
+
+ ret = dma_map_sg(nandc->dev, sgl, 1, desc->dir);
+ if (!ret) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ slave_conf.device_fc = flow_control;
+ if (read) {
+ slave_conf.src_maxburst = 16;
+ slave_conf.src_addr = nandc->base_dma + reg_off;
+ if (nandc->data_crci) {
+ periph_conf.crci = nandc->data_crci;
+ slave_conf.peripheral_config = &periph_conf;
+ slave_conf.peripheral_size = sizeof(periph_conf);
+ }
+ } else {
+ slave_conf.dst_maxburst = 16;
+ slave_conf.dst_addr = nandc->base_dma + reg_off;
+ if (nandc->cmd_crci) {
+ periph_conf.crci = nandc->cmd_crci;
+ slave_conf.peripheral_config = &periph_conf;
+ slave_conf.peripheral_size = sizeof(periph_conf);
+ }
+ }
+
+ ret = dmaengine_slave_config(nandc->chan, &slave_conf);
+ if (ret) {
+ dev_err(nandc->dev, "failed to configure dma channel\n");
+ goto err;
+ }
+
+ dma_desc = dmaengine_prep_slave_sg(nandc->chan, sgl, 1, dir_eng, 0);
+ if (!dma_desc) {
+ dev_err(nandc->dev, "failed to prepare desc\n");
+ ret = -EINVAL;
+ goto err;
+ }
+
+ desc->dma_desc = dma_desc;
+
+ list_add_tail(&desc->node, &nandc->desc_list);
+
+ return 0;
+err:
+ kfree(desc);
+
+ return ret;
+}
+
+/**
+ * qcom_submit_descs() - submit dma descriptor
+ * @nandc: qpic nand controller
+ *
+ * This function will submit all the prepared dma descriptor
+ * cmd or data descriptor
+ */
+int qcom_submit_descs(struct qcom_nand_controller *nandc)
+{
+ struct desc_info *desc, *n;
+ dma_cookie_t cookie = 0;
+ struct bam_transaction *bam_txn = nandc->bam_txn;
+ int ret = 0;
+
+ if (nandc->props->is_bam) {
+ if (bam_txn->rx_sgl_pos > bam_txn->rx_sgl_start) {
+ ret = qcom_prepare_bam_async_desc(nandc, nandc->rx_chan, 0);
+ if (ret)
+ goto err_unmap_free_desc;
+ }
+
+ if (bam_txn->tx_sgl_pos > bam_txn->tx_sgl_start) {
+ ret = qcom_prepare_bam_async_desc(nandc, nandc->tx_chan,
+ DMA_PREP_INTERRUPT);
+ if (ret)
+ goto err_unmap_free_desc;
+ }
+
+ if (bam_txn->cmd_sgl_pos > bam_txn->cmd_sgl_start) {
+ ret = qcom_prepare_bam_async_desc(nandc, nandc->cmd_chan,
+ DMA_PREP_CMD);
+ if (ret)
+ goto err_unmap_free_desc;
+ }
+ }
+
+ list_for_each_entry(desc, &nandc->desc_list, node)
+ cookie = dmaengine_submit(desc->dma_desc);
+
+ if (nandc->props->is_bam) {
+ bam_txn->last_cmd_desc->callback = qcom_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 = qcom_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);
+ dma_async_issue_pending(nandc->cmd_chan);
+
+ if (!wait_for_completion_timeout(&bam_txn->txn_done,
+ QPIC_NAND_COMPLETION_TIMEOUT))
+ ret = -ETIMEDOUT;
+ } else {
+ if (dma_sync_wait(nandc->chan, cookie) != DMA_COMPLETE)
+ ret = -ETIMEDOUT;
+ }
+
+err_unmap_free_desc:
+ /*
+ * Unmap the dma sg_list and free the desc allocated by both
+ * prepare_bam_async_desc() and prep_adm_dma_desc() functions.
+ */
+ list_for_each_entry_safe(desc, n, &nandc->desc_list, node) {
+ list_del(&desc->node);
+
+ if (nandc->props->is_bam)
+ dma_unmap_sg(nandc->dev, desc->bam_sgl,
+ desc->sgl_cnt, desc->dir);
+ else
+ dma_unmap_sg(nandc->dev, &desc->adm_sgl, 1,
+ desc->dir);
+
+ kfree(desc);
+ }
+
+ return ret;
+}
+
+/**
+ * qcom_prepare_bam_async_desc() - Prepare DMA descriptor
+ * @nandc: qpic nand controller
+ * @chan: dma channel
+ * @flags: flags to control DMA descriptor preparation
+ *
+ * This function maps the scatter gather list for DMA transfer and forms the
+ * DMA descriptor for BAM.This descriptor will be added in the NAND DMA
+ * descriptor queue which will be submitted to DMA engine.
+ */
+int qcom_prepare_bam_async_desc(struct qcom_nand_controller *nandc,
+ struct dma_chan *chan,
+ unsigned long flags)
+{
+ struct desc_info *desc;
+ struct scatterlist *sgl;
+ unsigned int sgl_cnt;
+ int ret;
+ struct bam_transaction *bam_txn = nandc->bam_txn;
+ enum dma_transfer_direction dir_eng;
+ struct dma_async_tx_descriptor *dma_desc;
+
+ desc = kzalloc(sizeof(*desc), GFP_KERNEL);
+ if (!desc)
+ return -ENOMEM;
+
+ if (chan == nandc->cmd_chan) {
+ sgl = &bam_txn->cmd_sgl[bam_txn->cmd_sgl_start];
+ sgl_cnt = bam_txn->cmd_sgl_pos - bam_txn->cmd_sgl_start;
+ bam_txn->cmd_sgl_start = bam_txn->cmd_sgl_pos;
+ dir_eng = DMA_MEM_TO_DEV;
+ desc->dir = DMA_TO_DEVICE;
+ } else if (chan == nandc->tx_chan) {
+ sgl = &bam_txn->data_sgl[bam_txn->tx_sgl_start];
+ sgl_cnt = bam_txn->tx_sgl_pos - bam_txn->tx_sgl_start;
+ bam_txn->tx_sgl_start = bam_txn->tx_sgl_pos;
+ dir_eng = DMA_MEM_TO_DEV;
+ desc->dir = DMA_TO_DEVICE;
+ } else {
+ sgl = &bam_txn->data_sgl[bam_txn->rx_sgl_start];
+ sgl_cnt = bam_txn->rx_sgl_pos - bam_txn->rx_sgl_start;
+ bam_txn->rx_sgl_start = bam_txn->rx_sgl_pos;
+ dir_eng = DMA_DEV_TO_MEM;
+ desc->dir = DMA_FROM_DEVICE;
+ }
+
+ sg_mark_end(sgl + sgl_cnt - 1);
+ ret = dma_map_sg(nandc->dev, sgl, sgl_cnt, desc->dir);
+ if (ret == 0) {
+ dev_err(nandc->dev, "failure in mapping desc\n");
+ kfree(desc);
+ return -ENOMEM;
+ }
+
+ desc->sgl_cnt = sgl_cnt;
+ desc->bam_sgl = sgl;
+
+ dma_desc = dmaengine_prep_slave_sg(chan, sgl, sgl_cnt, dir_eng,
+ flags);
+
+ if (!dma_desc) {
+ dev_err(nandc->dev, "failure in prep desc\n");
+ dma_unmap_sg(nandc->dev, sgl, sgl_cnt, desc->dir);
+ kfree(desc);
+ return -EINVAL;
+ }
+
+ desc->dma_desc = dma_desc;
+
+ /* update last data/command descriptor */
+ if (chan == nandc->cmd_chan)
+ bam_txn->last_cmd_desc = dma_desc;
+ else
+ bam_txn->last_data_desc = dma_desc;
+
+ list_add_tail(&desc->node, &nandc->desc_list);
+
+ return 0;
+}
+
+/**
+ * qcom_prep_bam_dma_desc_cmd() - Prepares the command descriptor for BAM DMA
+ * @nandc: qpic nand controller
+ * @read: read or write type
+ * @reg_off: offset within the controller's data buffer
+ * @vaddr: virtual address of the buffer we want to write to
+ * @size: DMA transaction size in bytes
+ * @flags: flags to control DMA descriptor preparation
+ *
+ * This function will prepares the command descriptor for BAM DMA
+ * which will be used for NAND register reads and writes.
+ */
+int qcom_prep_bam_dma_desc_cmd(struct qcom_nand_controller *nandc, bool read,
+ int reg_off, const void *vaddr,
+ int size, unsigned int flags)
+{
+ int bam_ce_size;
+ int i, ret;
+ struct bam_cmd_element *bam_ce_buffer;
+ struct bam_transaction *bam_txn = nandc->bam_txn;
+
+ bam_ce_buffer = &bam_txn->bam_ce[bam_txn->bam_ce_pos];
+
+ /* fill the command desc */
+ for (i = 0; i < size; i++) {
+ if (read)
+ bam_prep_ce(&bam_ce_buffer[i],
+ nandc_reg_phys(nandc, reg_off + 4 * i),
+ BAM_READ_COMMAND,
+ reg_buf_dma_addr(nandc,
+ (__le32 *)vaddr + i));
+ else
+ bam_prep_ce_le32(&bam_ce_buffer[i],
+ nandc_reg_phys(nandc, reg_off + 4 * i),
+ BAM_WRITE_COMMAND,
+ *((__le32 *)vaddr + i));
+ }
+
+ bam_txn->bam_ce_pos += size;
+
+ /* use the separate sgl after this command */
+ if (flags & NAND_BAM_NEXT_SGL) {
+ bam_ce_buffer = &bam_txn->bam_ce[bam_txn->bam_ce_start];
+ bam_ce_size = (bam_txn->bam_ce_pos -
+ bam_txn->bam_ce_start) *
+ sizeof(struct bam_cmd_element);
+ sg_set_buf(&bam_txn->cmd_sgl[bam_txn->cmd_sgl_pos],
+ bam_ce_buffer, bam_ce_size);
+ bam_txn->cmd_sgl_pos++;
+ bam_txn->bam_ce_start = bam_txn->bam_ce_pos;
+
+ if (flags & NAND_BAM_NWD) {
+ ret = qcom_prepare_bam_async_desc(nandc, nandc->cmd_chan,
+ DMA_PREP_FENCE |
+ DMA_PREP_CMD);
+ if (ret)
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * qcom_prep_bam_dma_desc_data() - Prepares the data descriptor for BAM DMA
+ * @nandc: qpic nand controller
+ * @read: read or write type
+ * @vaddr: virtual address of the buffer we want to write to
+ * @size: DMA transaction size in bytes
+ * @flags: flags to control DMA descriptor preparation
+ *
+ * This function will prepares the data descriptor for BAM DMA which
+ * will be used for NAND data reads and writes.
+ */
+int qcom_prep_bam_dma_desc_data(struct qcom_nand_controller *nandc, bool read,
+ const void *vaddr,
+ int size, unsigned int flags)
+{
+ int ret;
+ struct bam_transaction *bam_txn = nandc->bam_txn;
+
+ if (read) {
+ sg_set_buf(&bam_txn->data_sgl[bam_txn->rx_sgl_pos],
+ vaddr, size);
+ bam_txn->rx_sgl_pos++;
+ } else {
+ sg_set_buf(&bam_txn->data_sgl[bam_txn->tx_sgl_pos],
+ vaddr, size);
+ bam_txn->tx_sgl_pos++;
+
+ /*
+ * BAM will only set EOT for DMA_PREP_INTERRUPT so if this flag
+ * is not set, form the DMA descriptor
+ */
+ if (!(flags & NAND_BAM_NO_EOT)) {
+ ret = qcom_prepare_bam_async_desc(nandc, nandc->tx_chan,
+ DMA_PREP_INTERRUPT);
+ if (ret)
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * qcom_read_reg_dma() - read a given number of registers to the reg_read_buf pointer
+ * @nandc: qpic nand controller
+ * @first: offset of the first register in the contiguous block
+ * @num_regs: number of registers to read
+ * @flags: flags to control DMA descriptor preparation
+ *
+ * This function will prepares a descriptor to read a given number of
+ * contiguous registers to the reg_read_buf pointer.
+ */
+int qcom_read_reg_dma(struct qcom_nand_controller *nandc, int first,
+ int num_regs, unsigned int flags)
+{
+ bool flow_control = false;
+ void *vaddr;
+
+ vaddr = nandc->reg_read_buf + nandc->reg_read_pos;
+ nandc->reg_read_pos += num_regs;
+
+ if (first == NAND_DEV_CMD_VLD || first == NAND_DEV_CMD1)
+ first = dev_cmd_reg_addr(nandc, first);
+
+ if (nandc->props->is_bam)
+ return qcom_prep_bam_dma_desc_cmd(nandc, true, first, vaddr,
+ num_regs, flags);
+
+ if (first == NAND_READ_ID || first == NAND_FLASH_STATUS)
+ flow_control = true;
+
+ return qcom_prep_adm_dma_desc(nandc, true, first, vaddr,
+ num_regs * sizeof(u32), flow_control);
+}
+
+/**
+ * qcom_write_reg_dma() - write a given number of registers
+ * @nandc: qpic nand controller
+ * @first: offset of the first register in the contiguous block
+ * @num_regs: number of registers to write
+ * @flags: flags to control DMA descriptor preparation
+ *
+ * This function will prepares a descriptor to write a given number of
+ * contiguous registers
+ */
+int qcom_write_reg_dma(struct qcom_nand_controller *nandc, int first,
+ int num_regs, unsigned int flags)
+{
+ bool flow_control = false;
+ struct nandc_regs *regs = nandc->regs;
+ void *vaddr;
+
+ vaddr = qcom_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;
+
+ if (first == NAND_DEV_CMD1_RESTORE || first == NAND_DEV_CMD1)
+ first = dev_cmd_reg_addr(nandc, NAND_DEV_CMD1);
+
+ 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)
+ return qcom_prep_bam_dma_desc_cmd(nandc, false, first, vaddr,
+ num_regs, flags);
+
+ if (first == NAND_FLASH_CMD)
+ flow_control = true;
+
+ return qcom_prep_adm_dma_desc(nandc, false, first, vaddr,
+ num_regs * sizeof(u32), flow_control);
+}
+
+/**
+ * qcom_read_data_dma() - transfer data
+ * @nandc: qpic nand controller
+ * @reg_off: offset within the controller's data buffer
+ * @vaddr: virtual address of the buffer we want to write to
+ * @size: DMA transaction size in bytes
+ * @flags: flags to control DMA descriptor preparation
+ *
+ * This function will prepares a DMA descriptor to transfer data from the
+ * controller's internal buffer to the buffer 'vaddr'
+ */
+int qcom_read_data_dma(struct qcom_nand_controller *nandc, int reg_off,
+ const u8 *vaddr, int size, unsigned int flags)
+{
+ if (nandc->props->is_bam)
+ return qcom_prep_bam_dma_desc_data(nandc, true, vaddr, size, flags);
+
+ return qcom_prep_adm_dma_desc(nandc, true, reg_off, vaddr, size, false);
+}
+
+/**
+ * qcom_write_data_dma() - transfer data
+ * @nandc: qpic nand controller
+ * @reg_off: offset within the controller's data buffer
+ * @vaddr: virtual address of the buffer we want to read from
+ * @size: DMA transaction size in bytes
+ * @flags: flags to control DMA descriptor preparation
+ *
+ * This function will prepares a DMA descriptor to transfer data from
+ * 'vaddr' to the controller's internal buffer
+ */
+int qcom_write_data_dma(struct qcom_nand_controller *nandc, int reg_off,
+ const u8 *vaddr, int size, unsigned int flags)
+{
+ if (nandc->props->is_bam)
+ return qcom_prep_bam_dma_desc_data(nandc, false, vaddr, size, flags);
+
+ return qcom_prep_adm_dma_desc(nandc, false, reg_off, vaddr, size, false);
+}
+
+/**
+ * qcom_alloc_bam_transaction() - allocate BAM transaction
+ * @nandc: qpic nand controller
+ *
+ * This function will allocate and initialize the BAM transaction structure
+ */
+struct bam_transaction *
+qcom_alloc_bam_transaction(struct qcom_nand_controller *nandc)
+{
+ struct bam_transaction *bam_txn;
+ size_t bam_txn_size;
+ unsigned int num_cw = nandc->max_cwperpage;
+ void *bam_txn_buf;
+
+ bam_txn_size =
+ sizeof(*bam_txn) + num_cw *
+ ((sizeof(*bam_txn->bam_ce) * QPIC_PER_CW_CMD_ELEMENTS) +
+ (sizeof(*bam_txn->cmd_sgl) * QPIC_PER_CW_CMD_SGL) +
+ (sizeof(*bam_txn->data_sgl) * QPIC_PER_CW_DATA_SGL));
+
+ bam_txn_buf = kzalloc(bam_txn_size, GFP_KERNEL);
+ if (!bam_txn_buf)
+ return NULL;
+
+ bam_txn = bam_txn_buf;
+ bam_txn_buf += sizeof(*bam_txn);
+
+ bam_txn->bam_ce = bam_txn_buf;
+ bam_txn_buf +=
+ sizeof(*bam_txn->bam_ce) * QPIC_PER_CW_CMD_ELEMENTS * num_cw;
+
+ bam_txn->cmd_sgl = bam_txn_buf;
+ bam_txn_buf +=
+ sizeof(*bam_txn->cmd_sgl) * QPIC_PER_CW_CMD_SGL * num_cw;
+
+ bam_txn->data_sgl = bam_txn_buf;
+
+ init_completion(&bam_txn->txn_done);
+
+ return bam_txn;
+}
+
+/**
+ * qcom_clear_bam_transaction() - Clears the BAM transaction
+ * @nandc: qpic nand controller
+ *
+ * This function will clear the BAM transaction indexes.
+ */
+void qcom_clear_bam_transaction(struct qcom_nand_controller *nandc)
+{
+ struct bam_transaction *bam_txn = nandc->bam_txn;
+
+ if (!nandc->props->is_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;
+ 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);
+ sg_init_table(bam_txn->data_sgl, nandc->max_cwperpage *
+ QPIC_PER_CW_DATA_SGL);
+
+ reinit_completion(&bam_txn->txn_done);
+}
+
+/**
+ * qcom_nandc_unalloc() - unallocate qpic nand controller
+ * @nandc: qpic nand controller
+ *
+ * This function will unallocate memory alloacted for qpic nand controller
+ */
+void qcom_nandc_unalloc(struct qcom_nand_controller *nandc)
+{
+ if (nandc->props->is_bam) {
+ if (!dma_mapping_error(nandc->dev, nandc->reg_read_dma))
+ dma_unmap_single(nandc->dev, nandc->reg_read_dma,
+ MAX_REG_RD *
+ sizeof(*nandc->reg_read_buf),
+ DMA_FROM_DEVICE);
+
+ if (nandc->tx_chan)
+ dma_release_channel(nandc->tx_chan);
+
+ if (nandc->rx_chan)
+ dma_release_channel(nandc->rx_chan);
+
+ if (nandc->cmd_chan)
+ dma_release_channel(nandc->cmd_chan);
+ } else {
+ if (nandc->chan)
+ dma_release_channel(nandc->chan);
+ }
+}
+
+/**
+ * qcom_nandc_alloc() - Allocate qpic nand controller
+ * @nandc: qpic nand controller
+ *
+ * This function will allocate memory for qpic nand controller
+ */
+int qcom_nandc_alloc(struct qcom_nand_controller *nandc)
+{
+ int ret;
+
+ ret = dma_set_coherent_mask(nandc->dev, DMA_BIT_MASK(32));
+ if (ret) {
+ dev_err(nandc->dev, "failed to set DMA mask\n");
+ return ret;
+ }
+
+ /*
+ * we use the internal buffer for reading ONFI params, reading small
+ * data like ID and status, and preforming read-copy-write operations
+ * when writing to a codeword partially. 532 is the maximum possible
+ * size of a codeword for our nand controller
+ */
+ nandc->buf_size = 532;
+
+ nandc->data_buffer = devm_kzalloc(nandc->dev, nandc->buf_size, GFP_KERNEL);
+ if (!nandc->data_buffer)
+ return -ENOMEM;
+
+ nandc->regs = devm_kzalloc(nandc->dev, sizeof(*nandc->regs), GFP_KERNEL);
+ if (!nandc->regs)
+ return -ENOMEM;
+
+ nandc->reg_read_buf = devm_kcalloc(nandc->dev, MAX_REG_RD,
+ sizeof(*nandc->reg_read_buf),
+ GFP_KERNEL);
+ if (!nandc->reg_read_buf)
+ return -ENOMEM;
+
+ if (nandc->props->is_bam) {
+ nandc->reg_read_dma =
+ dma_map_single(nandc->dev, nandc->reg_read_buf,
+ MAX_REG_RD *
+ sizeof(*nandc->reg_read_buf),
+ DMA_FROM_DEVICE);
+ if (dma_mapping_error(nandc->dev, nandc->reg_read_dma)) {
+ dev_err(nandc->dev, "failed to DMA MAP reg buffer\n");
+ return -EIO;
+ }
+
+ nandc->tx_chan = dma_request_chan(nandc->dev, "tx");
+ if (IS_ERR(nandc->tx_chan)) {
+ ret = PTR_ERR(nandc->tx_chan);
+ nandc->tx_chan = NULL;
+ dev_err_probe(nandc->dev, ret,
+ "tx DMA channel request failed\n");
+ goto unalloc;
+ }
+
+ nandc->rx_chan = dma_request_chan(nandc->dev, "rx");
+ if (IS_ERR(nandc->rx_chan)) {
+ ret = PTR_ERR(nandc->rx_chan);
+ nandc->rx_chan = NULL;
+ dev_err_probe(nandc->dev, ret,
+ "rx DMA channel request failed\n");
+ goto unalloc;
+ }
+
+ nandc->cmd_chan = dma_request_chan(nandc->dev, "cmd");
+ if (IS_ERR(nandc->cmd_chan)) {
+ ret = PTR_ERR(nandc->cmd_chan);
+ nandc->cmd_chan = NULL;
+ dev_err_probe(nandc->dev, ret,
+ "cmd DMA channel request failed\n");
+ goto unalloc;
+ }
+
+ /*
+ * Initially allocate BAM transaction to read ONFI param page.
+ * After detecting all the devices, this BAM transaction will
+ * be freed and the next BAM transaction will be allocated with
+ * maximum codeword size
+ */
+ nandc->max_cwperpage = 1;
+ nandc->bam_txn = qcom_alloc_bam_transaction(nandc);
+ if (!nandc->bam_txn) {
+ dev_err(nandc->dev,
+ "failed to allocate bam transaction\n");
+ ret = -ENOMEM;
+ goto unalloc;
+ }
+ } else {
+ nandc->chan = dma_request_chan(nandc->dev, "rxtx");
+ if (IS_ERR(nandc->chan)) {
+ ret = PTR_ERR(nandc->chan);
+ nandc->chan = NULL;
+ dev_err_probe(nandc->dev, ret,
+ "rxtx DMA channel request failed\n");
+ return ret;
+ }
+ }
+
+ INIT_LIST_HEAD(&nandc->desc_list);
+ INIT_LIST_HEAD(&nandc->host_list);
+
+ return 0;
+unalloc:
+ qcom_nandc_unalloc(nandc);
+ return ret;
+}
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index cbf8ae85e1ae..3aa000f877a4 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -334,6 +334,7 @@ config MTD_NAND_QCOM
tristate "QCOM NAND controller"
depends on ARCH_QCOM || COMPILE_TEST
depends on HAS_IOMEM
+ select QPIC_COMMON
help
Enables support for NAND flash chips on SoCs containing the EBI2 NAND
controller. This controller is found on IPQ806x SoC.
diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
index b079605c84d3..d4faabc8244f 100644
--- a/drivers/mtd/nand/raw/qcom_nandc.c
+++ b/drivers/mtd/nand/raw/qcom_nandc.c
@@ -2,186 +2,7 @@
/*
* Copyright (c) 2016, The Linux Foundation. All rights reserved.
*/
-#include <linux/bitops.h>
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-mapping.h>
-#include <linux/dma/qcom_adm.h>
-#include <linux/dma/qcom_bam_dma.h>
-#include <linux/module.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/rawnand.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-
-/* NANDc reg offsets */
-#define NAND_FLASH_CMD 0x00
-#define NAND_ADDR0 0x04
-#define NAND_ADDR1 0x08
-#define NAND_FLASH_CHIP_SELECT 0x0c
-#define NAND_EXEC_CMD 0x10
-#define NAND_FLASH_STATUS 0x14
-#define NAND_BUFFER_STATUS 0x18
-#define NAND_DEV0_CFG0 0x20
-#define NAND_DEV0_CFG1 0x24
-#define NAND_DEV0_ECC_CFG 0x28
-#define NAND_AUTO_STATUS_EN 0x2c
-#define NAND_DEV1_CFG0 0x30
-#define NAND_DEV1_CFG1 0x34
-#define NAND_READ_ID 0x40
-#define NAND_READ_STATUS 0x44
-#define NAND_DEV_CMD0 0xa0
-#define NAND_DEV_CMD1 0xa4
-#define NAND_DEV_CMD2 0xa8
-#define NAND_DEV_CMD_VLD 0xac
-#define SFLASHC_BURST_CFG 0xe0
-#define NAND_ERASED_CW_DETECT_CFG 0xe8
-#define NAND_ERASED_CW_DETECT_STATUS 0xec
-#define NAND_EBI2_ECC_BUF_CFG 0xf0
-#define FLASH_BUF_ACC 0x100
-
-#define NAND_CTRL 0xf00
-#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
-#define NAND_READ_LOCATION_LAST_CW_0 0xf40
-#define NAND_READ_LOCATION_LAST_CW_1 0xf44
-#define NAND_READ_LOCATION_LAST_CW_2 0xf48
-#define NAND_READ_LOCATION_LAST_CW_3 0xf4c
-
-/* dummy register offsets, used by write_reg_dma */
-#define NAND_DEV_CMD1_RESTORE 0xdead
-#define NAND_DEV_CMD_VLD_RESTORE 0xbeef
-
-/* NAND_FLASH_CMD bits */
-#define PAGE_ACC BIT(4)
-#define LAST_PAGE BIT(5)
-
-/* NAND_FLASH_CHIP_SELECT bits */
-#define NAND_DEV_SEL 0
-#define DM_EN BIT(2)
-
-/* NAND_FLASH_STATUS bits */
-#define FS_OP_ERR BIT(4)
-#define FS_READY_BSY_N BIT(5)
-#define FS_MPU_ERR BIT(8)
-#define FS_DEVICE_STS_ERR BIT(16)
-#define FS_DEVICE_WP BIT(23)
-
-/* NAND_BUFFER_STATUS bits */
-#define BS_UNCORRECTABLE_BIT BIT(8)
-#define BS_CORRECTABLE_ERR_MSK 0x1f
-
-/* NAND_DEVn_CFG0 bits */
-#define DISABLE_STATUS_AFTER_WRITE 4
-#define CW_PER_PAGE 6
-#define UD_SIZE_BYTES 9
-#define UD_SIZE_BYTES_MASK GENMASK(18, 9)
-#define ECC_PARITY_SIZE_BYTES_RS 19
-#define SPARE_SIZE_BYTES 23
-#define SPARE_SIZE_BYTES_MASK GENMASK(26, 23)
-#define NUM_ADDR_CYCLES 27
-#define STATUS_BFR_READ 30
-#define SET_RD_MODE_AFTER_STATUS 31
-
-/* NAND_DEVn_CFG0 bits */
-#define DEV0_CFG1_ECC_DISABLE 0
-#define WIDE_FLASH 1
-#define NAND_RECOVERY_CYCLES 2
-#define CS_ACTIVE_BSY 5
-#define BAD_BLOCK_BYTE_NUM 6
-#define BAD_BLOCK_IN_SPARE_AREA 16
-#define WR_RD_BSY_GAP 17
-#define ENABLE_BCH_ECC 27
-
-/* NAND_DEV0_ECC_CFG bits */
-#define ECC_CFG_ECC_DISABLE 0
-#define ECC_SW_RESET 1
-#define ECC_MODE 4
-#define ECC_PARITY_SIZE_BYTES_BCH 8
-#define ECC_NUM_DATA_BYTES 16
-#define ECC_NUM_DATA_BYTES_MASK GENMASK(25, 16)
-#define ECC_FORCE_CLK_OPEN 30
-
-/* NAND_DEV_CMD1 bits */
-#define READ_ADDR 0
-
-/* NAND_DEV_CMD_VLD bits */
-#define READ_START_VLD BIT(0)
-#define READ_STOP_VLD BIT(1)
-#define WRITE_START_VLD BIT(2)
-#define ERASE_START_VLD BIT(3)
-#define SEQ_READ_START_VLD BIT(4)
-
-/* NAND_EBI2_ECC_BUF_CFG bits */
-#define NUM_STEPS 0
-
-/* NAND_ERASED_CW_DETECT_CFG bits */
-#define ERASED_CW_ECC_MASK 1
-#define AUTO_DETECT_RES 0
-#define MASK_ECC BIT(ERASED_CW_ECC_MASK)
-#define RESET_ERASED_DET BIT(AUTO_DETECT_RES)
-#define ACTIVE_ERASED_DET (0 << AUTO_DETECT_RES)
-#define CLR_ERASED_PAGE_DET (RESET_ERASED_DET | MASK_ECC)
-#define SET_ERASED_PAGE_DET (ACTIVE_ERASED_DET | MASK_ECC)
-
-/* NAND_ERASED_CW_DETECT_STATUS bits */
-#define PAGE_ALL_ERASED BIT(7)
-#define CODEWORD_ALL_ERASED BIT(6)
-#define PAGE_ERASED BIT(5)
-#define CODEWORD_ERASED BIT(4)
-#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
-#define NAND_VERSION_MINOR_MASK 0x0fff0000
-#define NAND_VERSION_MINOR_SHIFT 16
-
-/* NAND OP_CMDs */
-#define OP_PAGE_READ 0x2
-#define OP_PAGE_READ_WITH_ECC 0x3
-#define OP_PAGE_READ_WITH_ECC_SPARE 0x4
-#define OP_PAGE_READ_ONFI_READ 0x5
-#define OP_PROGRAM_PAGE 0x6
-#define OP_PAGE_PROGRAM_WITH_ECC 0x7
-#define OP_PROGRAM_PAGE_SPARE 0x9
-#define OP_BLOCK_ERASE 0xa
-#define OP_CHECK_STATUS 0xc
-#define OP_FETCH_ID 0xb
-#define OP_RESET_DEVICE 0xd
-
-/* Default Value for NAND_DEV_CMD_VLD */
-#define NAND_DEV_CMD_VLD_VAL (READ_START_VLD | WRITE_START_VLD | \
- ERASE_START_VLD | SEQ_READ_START_VLD)
-
-/* NAND_CTRL bits */
-#define BAM_MODE_EN BIT(0)
-
-/*
- * the NAND controller performs reads/writes with ECC in 516 byte chunks.
- * the driver calls the chunks 'step' or 'codeword' interchangeably
- */
-#define NANDC_STEP_SIZE 512
-
-/*
- * the largest page size we support is 8K, this will have 16 steps/codewords
- * of 512 bytes each
- */
-#define MAX_NUM_STEPS (SZ_8K / NANDC_STEP_SIZE)
-
-/* we read at most 3 registers per codeword scan */
-#define MAX_REG_RD (3 * MAX_NUM_STEPS)
+#include <linux/mtd/nand-qpic-common.h>

/* ECC modes supported by the controller */
#define ECC_NONE BIT(0)
@@ -200,247 +21,6 @@ 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)
- */
-#define dev_cmd_reg_addr(nandc, reg) ((nandc)->props->dev_cmd_reg_start + (reg))
-
-/* Returns the NAND register physical address */
-#define nandc_reg_phys(chip, offset) ((chip)->base_phys + (offset))
-
-/* Returns the dma address for reg read buffer */
-#define reg_buf_dma_addr(chip, vaddr) \
- ((chip)->reg_read_dma + \
- ((u8 *)(vaddr) - (u8 *)(chip)->reg_read_buf))
-
-#define QPIC_PER_CW_CMD_ELEMENTS 32
-#define QPIC_PER_CW_CMD_SGL 32
-#define QPIC_PER_CW_DATA_SGL 8
-
-#define QPIC_NAND_COMPLETION_TIMEOUT msecs_to_jiffies(2000)
-
-/*
- * Flags used in DMA descriptor preparation helper functions
- * (i.e. read_reg_dma/write_reg_dma/read_data_dma/write_data_dma)
- */
-/* Don't set the EOT in current tx BAM sgl */
-#define NAND_BAM_NO_EOT BIT(0)
-/* Set the NWD flag in current BAM sgl */
-#define NAND_BAM_NWD BIT(1)
-/* Finish writing in the current BAM sgl and start writing in another BAM sgl */
-#define NAND_BAM_NEXT_SGL BIT(2)
-/*
- * Erased codeword status is being used two times in single transfer so this
- * flag will determine the current value of erased codeword status register
- */
-#define NAND_ERASED_CW_SET BIT(4)
-
-#define MAX_ADDRESS_CYCLE 5
-
-/*
- * This data type corresponds to the BAM transaction which will be used for all
- * NAND transfers.
- * @bam_ce - the array of BAM command elements
- * @cmd_sgl - sgl for NAND BAM command pipe
- * @data_sgl - sgl for NAND BAM consumer/producer pipe
- * @last_data_desc - last DMA desc in data channel (tx/rx).
- * @last_cmd_desc - last DMA desc in command channel.
- * @txn_done - completion for NAND transfer.
- * @bam_ce_pos - the index in bam_ce which is available for next sgl
- * @bam_ce_start - the index in bam_ce which marks the start position ce
- * for current sgl. It will be used for size calculation
- * for current sgl
- * @cmd_sgl_pos - current index in command sgl.
- * @cmd_sgl_start - start index in command sgl.
- * @tx_sgl_pos - current index in data sgl for tx.
- * @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;
- struct scatterlist *cmd_sgl;
- struct scatterlist *data_sgl;
- struct dma_async_tx_descriptor *last_data_desc;
- struct dma_async_tx_descriptor *last_cmd_desc;
- struct completion txn_done;
- u32 bam_ce_pos;
- u32 bam_ce_start;
- u32 cmd_sgl_pos;
- u32 cmd_sgl_start;
- u32 tx_sgl_pos;
- u32 tx_sgl_start;
- u32 rx_sgl_pos;
- u32 rx_sgl_start;
- bool wait_second_completion;
-};
-
-/*
- * This data type corresponds to the nand dma descriptor
- * @dma_desc - low level DMA engine descriptor
- * @list - list for desc_info
- *
- * @adm_sgl - sgl which will be used for single sgl dma descriptor. Only used by
- * ADM
- * @bam_sgl - sgl which will be used for dma descriptor. Only used by BAM
- * @sgl_cnt - number of SGL in bam_sgl. Only used by BAM
- * @dir - DMA transfer direction
- */
-struct desc_info {
- struct dma_async_tx_descriptor *dma_desc;
- struct list_head node;
-
- union {
- struct scatterlist adm_sgl;
- struct {
- struct scatterlist *bam_sgl;
- int sgl_cnt;
- };
- };
- enum dma_data_direction dir;
-};
-
-/*
- * holds the current register values that we want to write. acts as a contiguous
- * chunk of memory which we use to write the controller registers through DMA.
- */
-struct nandc_regs {
- __le32 cmd;
- __le32 addr0;
- __le32 addr1;
- __le32 chip_sel;
- __le32 exec;
-
- __le32 cfg0;
- __le32 cfg1;
- __le32 ecc_bch_cfg;
-
- __le32 clrflashstatus;
- __le32 clrreadstatus;
-
- __le32 cmd1;
- __le32 vld;
-
- __le32 orig_cmd1;
- __le32 orig_vld;
-
- __le32 ecc_buf_cfg;
- __le32 read_location0;
- __le32 read_location1;
- __le32 read_location2;
- __le32 read_location3;
- __le32 read_location_last0;
- __le32 read_location_last1;
- __le32 read_location_last2;
- __le32 read_location_last3;
-
- __le32 erased_cw_detect_cfg_clr;
- __le32 erased_cw_detect_cfg_set;
-};
-
-/*
- * NAND controller data struct
- *
- * @dev: parent device
- *
- * @base: MMIO base
- *
- * @core_clk: controller clock
- * @aon_clk: another controller clock
- *
- * @regs: a contiguous chunk of memory for DMA register
- * writes. contains the register values to be
- * written to controller
- *
- * @props: properties of current NAND controller,
- * initialized via DT match data
- *
- * @controller: base controller structure
- * @host_list: list containing all the chips attached to the
- * controller
- *
- * @chan: dma channel
- * @cmd_crci: ADM DMA CRCI for command flow control
- * @data_crci: ADM DMA CRCI for data flow control
- *
- * @desc_list: DMA descriptor list (list of desc_infos)
- *
- * @data_buffer: our local DMA buffer for page read/writes,
- * used when we can't use the buffer provided
- * by upper layers directly
- * @reg_read_buf: local buffer for reading back registers via DMA
- *
- * @base_phys: physical base address of controller registers
- * @base_dma: dma base address of controller registers
- * @reg_read_dma: contains dma address for register read buffer
- *
- * @buf_size/count/start: markers for chip->legacy.read_buf/write_buf
- * functions
- * @max_cwperpage: maximum QPIC codewords required. calculated
- * from all connected NAND devices pagesize
- *
- * @reg_read_pos: marker for data read in reg_read_buf
- *
- * @cmd1/vld: some fixed controller register values
- *
- * @exec_opwrite: flag to select correct number of code word
- * while reading status
- */
-struct qcom_nand_controller {
- struct device *dev;
-
- void __iomem *base;
-
- struct clk *core_clk;
- struct clk *aon_clk;
-
- struct nandc_regs *regs;
- struct bam_transaction *bam_txn;
-
- const struct qcom_nandc_props *props;
-
- struct nand_controller controller;
- struct list_head host_list;
-
- union {
- /* will be used only by QPIC for BAM DMA */
- struct {
- struct dma_chan *tx_chan;
- struct dma_chan *rx_chan;
- struct dma_chan *cmd_chan;
- };
-
- /* will be used only by EBI2 for ADM DMA */
- struct {
- struct dma_chan *chan;
- unsigned int cmd_crci;
- unsigned int data_crci;
- };
- };
-
- struct list_head desc_list;
-
- u8 *data_buffer;
- __le32 *reg_read_buf;
-
- phys_addr_t base_phys;
- dma_addr_t base_dma;
- dma_addr_t reg_read_dma;
-
- int buf_size;
- int buf_count;
- int buf_start;
- unsigned int max_cwperpage;
-
- int reg_read_pos;
-
- u32 cmd1, vld;
- bool exec_opwrite;
-};
-
/*
* NAND special boot partitions
*
@@ -544,113 +124,24 @@ struct qcom_nand_host {
bool bch_enabled;
};

-/*
- * This data type corresponds to the NAND controller properties which varies
- * 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
- * @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 use_codeword_fixup;
-};
-
-/* Frees the BAM transaction memory */
-static void free_bam_transaction(struct qcom_nand_controller *nandc)
-{
- struct bam_transaction *bam_txn = nandc->bam_txn;
-
- devm_kfree(nandc->dev, bam_txn);
-}
-
-/* Allocates and Initializes the BAM transaction */
-static struct bam_transaction *
-alloc_bam_transaction(struct qcom_nand_controller *nandc)
+struct qcom_nand_controller *
+get_qcom_nand_controller(struct nand_chip *chip)
{
- struct bam_transaction *bam_txn;
- size_t bam_txn_size;
- unsigned int num_cw = nandc->max_cwperpage;
- void *bam_txn_buf;
-
- bam_txn_size =
- sizeof(*bam_txn) + num_cw *
- ((sizeof(*bam_txn->bam_ce) * QPIC_PER_CW_CMD_ELEMENTS) +
- (sizeof(*bam_txn->cmd_sgl) * QPIC_PER_CW_CMD_SGL) +
- (sizeof(*bam_txn->data_sgl) * QPIC_PER_CW_DATA_SGL));
-
- bam_txn_buf = devm_kzalloc(nandc->dev, bam_txn_size, GFP_KERNEL);
- if (!bam_txn_buf)
- return NULL;
-
- bam_txn = bam_txn_buf;
- bam_txn_buf += sizeof(*bam_txn);
-
- bam_txn->bam_ce = bam_txn_buf;
- bam_txn_buf +=
- sizeof(*bam_txn->bam_ce) * QPIC_PER_CW_CMD_ELEMENTS * num_cw;
-
- bam_txn->cmd_sgl = bam_txn_buf;
- bam_txn_buf +=
- sizeof(*bam_txn->cmd_sgl) * QPIC_PER_CW_CMD_SGL * num_cw;
-
- bam_txn->data_sgl = bam_txn_buf;
-
- init_completion(&bam_txn->txn_done);
-
- return bam_txn;
+ return container_of(chip->controller, struct qcom_nand_controller,
+ controller);
}

-/* Clears the BAM transaction indexes */
-static void clear_bam_transaction(struct qcom_nand_controller *nandc)
+static void nandc_set_reg(struct nand_chip *chip, int offset,
+ u32 val)
{
- struct bam_transaction *bam_txn = nandc->bam_txn;
-
- if (!nandc->props->is_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;
- 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);
- sg_init_table(bam_txn->data_sgl, nandc->max_cwperpage *
- QPIC_PER_CW_DATA_SGL);
-
- reinit_completion(&bam_txn->txn_done);
-}
+ struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
+ struct nandc_regs *regs = nandc->regs;
+ __le32 *reg;

-/* Callback for DMA descriptor completion */
-static void qpic_bam_dma_done(void *data)
-{
- struct bam_transaction *bam_txn = data;
+ reg = qcom_offset_to_nandc_reg(regs, offset);

- /*
- * 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);
+ if (reg)
+ *reg = cpu_to_le32(val);
}

static inline struct qcom_nand_host *to_qcom_nand_host(struct nand_chip *chip)
@@ -658,13 +149,6 @@ static inline struct qcom_nand_host *to_qcom_nand_host(struct nand_chip *chip)
return container_of(chip, struct qcom_nand_host, chip);
}

-static inline struct qcom_nand_controller *
-get_qcom_nand_controller(struct nand_chip *chip)
-{
- return container_of(chip->controller, struct qcom_nand_controller,
- controller);
-}
-
static inline u32 nandc_read(struct qcom_nand_controller *nandc, int offset)
{
return ioread32(nandc->base + offset);
@@ -676,91 +160,6 @@ 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)
-{
- if (!nandc->props->is_bam)
- return;
-
- if (is_cpu)
- dma_sync_single_for_cpu(nandc->dev, nandc->reg_read_dma,
- MAX_REG_RD *
- sizeof(*nandc->reg_read_buf),
- DMA_FROM_DEVICE);
- else
- dma_sync_single_for_device(nandc->dev, nandc->reg_read_dma,
- MAX_REG_RD *
- sizeof(*nandc->reg_read_buf),
- 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;
- }
-}
-
-static void nandc_set_reg(struct nand_chip *chip, int offset,
- u32 val)
-{
- 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);
-}
-
/* 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)
{
@@ -852,383 +251,6 @@ static void update_rw_regs(struct qcom_nand_host *host, int num_cw, bool read, i
host->cw_data : host->cw_size, 1);
}

-/*
- * Maps the scatter gather list for DMA transfer and forms the DMA descriptor
- * for BAM. This descriptor will be added in the NAND DMA descriptor queue
- * which will be submitted to DMA engine.
- */
-static int prepare_bam_async_desc(struct qcom_nand_controller *nandc,
- struct dma_chan *chan,
- unsigned long flags)
-{
- struct desc_info *desc;
- struct scatterlist *sgl;
- unsigned int sgl_cnt;
- int ret;
- struct bam_transaction *bam_txn = nandc->bam_txn;
- enum dma_transfer_direction dir_eng;
- struct dma_async_tx_descriptor *dma_desc;
-
- desc = kzalloc(sizeof(*desc), GFP_KERNEL);
- if (!desc)
- return -ENOMEM;
-
- if (chan == nandc->cmd_chan) {
- sgl = &bam_txn->cmd_sgl[bam_txn->cmd_sgl_start];
- sgl_cnt = bam_txn->cmd_sgl_pos - bam_txn->cmd_sgl_start;
- bam_txn->cmd_sgl_start = bam_txn->cmd_sgl_pos;
- dir_eng = DMA_MEM_TO_DEV;
- desc->dir = DMA_TO_DEVICE;
- } else if (chan == nandc->tx_chan) {
- sgl = &bam_txn->data_sgl[bam_txn->tx_sgl_start];
- sgl_cnt = bam_txn->tx_sgl_pos - bam_txn->tx_sgl_start;
- bam_txn->tx_sgl_start = bam_txn->tx_sgl_pos;
- dir_eng = DMA_MEM_TO_DEV;
- desc->dir = DMA_TO_DEVICE;
- } else {
- sgl = &bam_txn->data_sgl[bam_txn->rx_sgl_start];
- sgl_cnt = bam_txn->rx_sgl_pos - bam_txn->rx_sgl_start;
- bam_txn->rx_sgl_start = bam_txn->rx_sgl_pos;
- dir_eng = DMA_DEV_TO_MEM;
- desc->dir = DMA_FROM_DEVICE;
- }
-
- sg_mark_end(sgl + sgl_cnt - 1);
- ret = dma_map_sg(nandc->dev, sgl, sgl_cnt, desc->dir);
- if (ret == 0) {
- dev_err(nandc->dev, "failure in mapping desc\n");
- kfree(desc);
- return -ENOMEM;
- }
-
- desc->sgl_cnt = sgl_cnt;
- desc->bam_sgl = sgl;
-
- dma_desc = dmaengine_prep_slave_sg(chan, sgl, sgl_cnt, dir_eng,
- flags);
-
- if (!dma_desc) {
- dev_err(nandc->dev, "failure in prep desc\n");
- dma_unmap_sg(nandc->dev, sgl, sgl_cnt, desc->dir);
- kfree(desc);
- return -EINVAL;
- }
-
- desc->dma_desc = dma_desc;
-
- /* update last data/command descriptor */
- if (chan == nandc->cmd_chan)
- bam_txn->last_cmd_desc = dma_desc;
- else
- bam_txn->last_data_desc = dma_desc;
-
- list_add_tail(&desc->node, &nandc->desc_list);
-
- return 0;
-}
-
-/*
- * Prepares the command descriptor for BAM DMA which will be used for NAND
- * register reads and writes. The command descriptor requires the command
- * to be formed in command element type so this function uses the command
- * element from bam transaction ce array and fills the same with required
- * data. A single SGL can contain multiple command elements so
- * NAND_BAM_NEXT_SGL will be used for starting the separate SGL
- * after the current command element.
- */
-static int prep_bam_dma_desc_cmd(struct qcom_nand_controller *nandc, bool read,
- int reg_off, const void *vaddr,
- int size, unsigned int flags)
-{
- int bam_ce_size;
- int i, ret;
- struct bam_cmd_element *bam_ce_buffer;
- struct bam_transaction *bam_txn = nandc->bam_txn;
-
- bam_ce_buffer = &bam_txn->bam_ce[bam_txn->bam_ce_pos];
-
- /* fill the command desc */
- for (i = 0; i < size; i++) {
- if (read)
- bam_prep_ce(&bam_ce_buffer[i],
- nandc_reg_phys(nandc, reg_off + 4 * i),
- BAM_READ_COMMAND,
- reg_buf_dma_addr(nandc,
- (__le32 *)vaddr + i));
- else
- bam_prep_ce_le32(&bam_ce_buffer[i],
- nandc_reg_phys(nandc, reg_off + 4 * i),
- BAM_WRITE_COMMAND,
- *((__le32 *)vaddr + i));
- }
-
- bam_txn->bam_ce_pos += size;
-
- /* use the separate sgl after this command */
- if (flags & NAND_BAM_NEXT_SGL) {
- bam_ce_buffer = &bam_txn->bam_ce[bam_txn->bam_ce_start];
- bam_ce_size = (bam_txn->bam_ce_pos -
- bam_txn->bam_ce_start) *
- sizeof(struct bam_cmd_element);
- sg_set_buf(&bam_txn->cmd_sgl[bam_txn->cmd_sgl_pos],
- bam_ce_buffer, bam_ce_size);
- bam_txn->cmd_sgl_pos++;
- bam_txn->bam_ce_start = bam_txn->bam_ce_pos;
-
- if (flags & NAND_BAM_NWD) {
- ret = prepare_bam_async_desc(nandc, nandc->cmd_chan,
- DMA_PREP_FENCE |
- DMA_PREP_CMD);
- if (ret)
- return ret;
- }
- }
-
- return 0;
-}
-
-/*
- * Prepares the data descriptor for BAM DMA which will be used for NAND
- * data reads and writes.
- */
-static int prep_bam_dma_desc_data(struct qcom_nand_controller *nandc, bool read,
- const void *vaddr,
- int size, unsigned int flags)
-{
- int ret;
- struct bam_transaction *bam_txn = nandc->bam_txn;
-
- if (read) {
- sg_set_buf(&bam_txn->data_sgl[bam_txn->rx_sgl_pos],
- vaddr, size);
- bam_txn->rx_sgl_pos++;
- } else {
- sg_set_buf(&bam_txn->data_sgl[bam_txn->tx_sgl_pos],
- vaddr, size);
- bam_txn->tx_sgl_pos++;
-
- /*
- * BAM will only set EOT for DMA_PREP_INTERRUPT so if this flag
- * is not set, form the DMA descriptor
- */
- if (!(flags & NAND_BAM_NO_EOT)) {
- ret = prepare_bam_async_desc(nandc, nandc->tx_chan,
- DMA_PREP_INTERRUPT);
- if (ret)
- return ret;
- }
- }
-
- return 0;
-}
-
-static int prep_adm_dma_desc(struct qcom_nand_controller *nandc, bool read,
- int reg_off, const void *vaddr, int size,
- bool flow_control)
-{
- struct desc_info *desc;
- struct dma_async_tx_descriptor *dma_desc;
- struct scatterlist *sgl;
- struct dma_slave_config slave_conf;
- struct qcom_adm_peripheral_config periph_conf = {};
- enum dma_transfer_direction dir_eng;
- int ret;
-
- desc = kzalloc(sizeof(*desc), GFP_KERNEL);
- if (!desc)
- return -ENOMEM;
-
- sgl = &desc->adm_sgl;
-
- sg_init_one(sgl, vaddr, size);
-
- if (read) {
- dir_eng = DMA_DEV_TO_MEM;
- desc->dir = DMA_FROM_DEVICE;
- } else {
- dir_eng = DMA_MEM_TO_DEV;
- desc->dir = DMA_TO_DEVICE;
- }
-
- ret = dma_map_sg(nandc->dev, sgl, 1, desc->dir);
- if (ret == 0) {
- ret = -ENOMEM;
- goto err;
- }
-
- memset(&slave_conf, 0x00, sizeof(slave_conf));
-
- slave_conf.device_fc = flow_control;
- if (read) {
- slave_conf.src_maxburst = 16;
- slave_conf.src_addr = nandc->base_dma + reg_off;
- if (nandc->data_crci) {
- periph_conf.crci = nandc->data_crci;
- slave_conf.peripheral_config = &periph_conf;
- slave_conf.peripheral_size = sizeof(periph_conf);
- }
- } else {
- slave_conf.dst_maxburst = 16;
- slave_conf.dst_addr = nandc->base_dma + reg_off;
- if (nandc->cmd_crci) {
- periph_conf.crci = nandc->cmd_crci;
- slave_conf.peripheral_config = &periph_conf;
- slave_conf.peripheral_size = sizeof(periph_conf);
- }
- }
-
- ret = dmaengine_slave_config(nandc->chan, &slave_conf);
- if (ret) {
- dev_err(nandc->dev, "failed to configure dma channel\n");
- goto err;
- }
-
- dma_desc = dmaengine_prep_slave_sg(nandc->chan, sgl, 1, dir_eng, 0);
- if (!dma_desc) {
- dev_err(nandc->dev, "failed to prepare desc\n");
- ret = -EINVAL;
- goto err;
- }
-
- desc->dma_desc = dma_desc;
-
- list_add_tail(&desc->node, &nandc->desc_list);
-
- return 0;
-err:
- kfree(desc);
-
- return ret;
-}
-
-/*
- * read_reg_dma: prepares a descriptor to read a given number of
- * contiguous registers to the reg_read_buf pointer
- *
- * @first: offset of the first register in the contiguous block
- * @num_regs: number of registers to read
- * @flags: flags to control DMA descriptor preparation
- */
-static int read_reg_dma(struct qcom_nand_controller *nandc, int first,
- int num_regs, unsigned int flags)
-{
- bool flow_control = false;
- void *vaddr;
-
- vaddr = nandc->reg_read_buf + nandc->reg_read_pos;
- nandc->reg_read_pos += num_regs;
-
- if (first == NAND_DEV_CMD_VLD || first == NAND_DEV_CMD1)
- first = dev_cmd_reg_addr(nandc, first);
-
- if (nandc->props->is_bam)
- return prep_bam_dma_desc_cmd(nandc, true, first, vaddr,
- num_regs, flags);
-
- if (first == NAND_READ_ID || first == NAND_FLASH_STATUS)
- flow_control = true;
-
- return prep_adm_dma_desc(nandc, true, first, vaddr,
- num_regs * sizeof(u32), flow_control);
-}
-
-/*
- * write_reg_dma: prepares a descriptor to write a given number of
- * contiguous registers
- *
- * @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)
-{
- 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;
-
- if (first == NAND_DEV_CMD1_RESTORE || first == NAND_DEV_CMD1)
- first = dev_cmd_reg_addr(nandc, NAND_DEV_CMD1);
-
- 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)
- return prep_bam_dma_desc_cmd(nandc, false, first, vaddr,
- num_regs, flags);
-
- if (first == NAND_FLASH_CMD)
- flow_control = true;
-
- return prep_adm_dma_desc(nandc, false, first, vaddr,
- num_regs * sizeof(u32), flow_control);
-}
-
-/*
- * read_data_dma: prepares a DMA descriptor to transfer data from the
- * controller's internal buffer to the buffer 'vaddr'
- *
- * @reg_off: offset within the controller's data buffer
- * @vaddr: virtual address of the buffer we want to write to
- * @size: DMA transaction size in bytes
- * @flags: flags to control DMA descriptor preparation
- */
-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)
- return prep_bam_dma_desc_data(nandc, true, vaddr, size, flags);
-
- return prep_adm_dma_desc(nandc, true, reg_off, vaddr, size, false);
-}
-
-/*
- * write_data_dma: prepares a DMA descriptor to transfer data from
- * 'vaddr' to the controller's internal buffer
- *
- * @reg_off: offset within the controller's data buffer
- * @vaddr: virtual address of the buffer we want to read from
- * @size: DMA transaction size in bytes
- * @flags: flags to control DMA descriptor preparation
- */
-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)
- return prep_bam_dma_desc_data(nandc, false, vaddr, size, flags);
-
- return prep_adm_dma_desc(nandc, false, reg_off, vaddr, size, false);
-}
-
-/*
- * Helper to prepare DMA descriptors for configuring registers
- * before reading a NAND page.
- */
-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);
-}
-
/*
* Helper to prepare DMA descriptors for configuring registers
* before reading each codeword in NAND page.
@@ -1245,20 +267,37 @@ config_nand_cw_read(struct nand_chip *chip, bool use_ecc, int cw)
reg = NAND_READ_LOCATION_LAST_CW_0;

if (nandc->props->is_bam)
- write_reg_dma(nandc, reg, 4, NAND_BAM_NEXT_SGL);
+ qcom_write_reg_dma(nandc, reg, 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);
+ qcom_write_reg_dma(nandc, NAND_FLASH_CMD, 1, NAND_BAM_NEXT_SGL);
+ qcom_write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);

if (use_ecc) {
- read_reg_dma(nandc, NAND_FLASH_STATUS, 2, 0);
- read_reg_dma(nandc, NAND_ERASED_CW_DETECT_STATUS, 1,
- NAND_BAM_NEXT_SGL);
+ qcom_read_reg_dma(nandc, NAND_FLASH_STATUS, 2, 0);
+ qcom_read_reg_dma(nandc, NAND_ERASED_CW_DETECT_STATUS, 1,
+ NAND_BAM_NEXT_SGL);
} else {
- read_reg_dma(nandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL);
+ qcom_read_reg_dma(nandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL);
}
}

+/*
+ * Helper to prepare DMA descriptors for configuring registers
+ * before reading a NAND page.
+ */
+void config_nand_page_read(struct nand_chip *chip)
+{
+ struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
+
+ qcom_write_reg_dma(nandc, NAND_ADDR0, 2, 0);
+ qcom_write_reg_dma(nandc, NAND_DEV0_CFG0, 3, 0);
+ if (!nandc->props->qpic_v2)
+ qcom_write_reg_dma(nandc, NAND_EBI2_ECC_BUF_CFG, 1, 0);
+ qcom_write_reg_dma(nandc, NAND_ERASED_CW_DETECT_CFG, 1, 0);
+ qcom_write_reg_dma(nandc, NAND_ERASED_CW_DETECT_CFG, 1,
+ NAND_ERASED_CW_SET | NAND_BAM_NEXT_SGL);
+}
+
/*
* Helper to prepare dma descriptors to configure registers needed for reading a
* single codeword in page
@@ -1279,11 +318,11 @@ 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);
+ qcom_write_reg_dma(nandc, NAND_ADDR0, 2, 0);
+ qcom_write_reg_dma(nandc, NAND_DEV0_CFG0, 3, 0);
if (!nandc->props->qpic_v2)
- write_reg_dma(nandc, NAND_EBI2_ECC_BUF_CFG, 1,
- NAND_BAM_NEXT_SGL);
+ qcom_write_reg_dma(nandc, NAND_EBI2_ECC_BUF_CFG, 1,
+ NAND_BAM_NEXT_SGL);
}

/*
@@ -1294,95 +333,13 @@ 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);
+ qcom_write_reg_dma(nandc, NAND_FLASH_CMD, 1, NAND_BAM_NEXT_SGL);
+ qcom_write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);

- read_reg_dma(nandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL);
+ qcom_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);
-}
-
-/* helpers to submit/free our list of dma descriptors */
-static int submit_descs(struct qcom_nand_controller *nandc)
-{
- struct desc_info *desc, *n;
- dma_cookie_t cookie = 0;
- struct bam_transaction *bam_txn = nandc->bam_txn;
- int ret = 0;
-
- if (nandc->props->is_bam) {
- if (bam_txn->rx_sgl_pos > bam_txn->rx_sgl_start) {
- ret = prepare_bam_async_desc(nandc, nandc->rx_chan, 0);
- if (ret)
- goto err_unmap_free_desc;
- }
-
- if (bam_txn->tx_sgl_pos > bam_txn->tx_sgl_start) {
- ret = prepare_bam_async_desc(nandc, nandc->tx_chan,
- DMA_PREP_INTERRUPT);
- if (ret)
- goto err_unmap_free_desc;
- }
-
- if (bam_txn->cmd_sgl_pos > bam_txn->cmd_sgl_start) {
- ret = prepare_bam_async_desc(nandc, nandc->cmd_chan,
- DMA_PREP_CMD);
- if (ret)
- goto err_unmap_free_desc;
- }
- }
-
- list_for_each_entry(desc, &nandc->desc_list, node)
- cookie = dmaengine_submit(desc->dma_desc);
-
- if (nandc->props->is_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);
- dma_async_issue_pending(nandc->cmd_chan);
-
- if (!wait_for_completion_timeout(&bam_txn->txn_done,
- QPIC_NAND_COMPLETION_TIMEOUT))
- ret = -ETIMEDOUT;
- } else {
- if (dma_sync_wait(nandc->chan, cookie) != DMA_COMPLETE)
- ret = -ETIMEDOUT;
- }
-
-err_unmap_free_desc:
- /*
- * Unmap the dma sg_list and free the desc allocated by both
- * prepare_bam_async_desc() and prep_adm_dma_desc() functions.
- */
- list_for_each_entry_safe(desc, n, &nandc->desc_list, node) {
- list_del(&desc->node);
-
- if (nandc->props->is_bam)
- dma_unmap_sg(nandc->dev, desc->bam_sgl,
- desc->sgl_cnt, desc->dir);
- else
- dma_unmap_sg(nandc->dev, &desc->adm_sgl, 1,
- desc->dir);
-
- kfree(desc);
- }
-
- return ret;
-}
-
-/* reset the register read buffer for next NAND operation */
-static void clear_read_regs(struct qcom_nand_controller *nandc)
-{
- nandc->reg_read_pos = 0;
- nandc_read_buffer_sync(nandc, false);
+ qcom_write_reg_dma(nandc, NAND_FLASH_STATUS, 1, 0);
+ qcom_write_reg_dma(nandc, NAND_READ_STATUS, 1, NAND_BAM_NEXT_SGL);
}

/*
@@ -1446,7 +403,7 @@ 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);
+ qcom_nandc_read_buffer_sync(nandc, true);

for (i = 0; i < cw_cnt; i++) {
u32 flash = le32_to_cpu(nandc->reg_read_buf[i]);
@@ -1473,13 +430,13 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, struct nand_chip *chip,
nand_read_page_op(chip, page, 0, NULL, 0);
nandc->buf_count = 0;
nandc->buf_start = 0;
- clear_read_regs(nandc);
+ qcom_clear_read_regs(nandc);
host->use_ecc = false;

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

- clear_bam_transaction(nandc);
+ qcom_clear_bam_transaction(nandc);
set_address(host, host->cw_size * cw, page);
update_rw_regs(host, 1, true, raw_cw);
config_nand_page_read(chip);
@@ -1512,18 +469,18 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, struct nand_chip *chip,

config_nand_cw_read(chip, false, raw_cw);

- read_data_dma(nandc, reg_off, data_buf, data_size1, 0);
+ qcom_read_data_dma(nandc, reg_off, data_buf, data_size1, 0);
reg_off += data_size1;

- read_data_dma(nandc, reg_off, oob_buf, oob_size1, 0);
+ qcom_read_data_dma(nandc, reg_off, oob_buf, oob_size1, 0);
reg_off += oob_size1;

- read_data_dma(nandc, reg_off, data_buf + data_size1, data_size2, 0);
+ qcom_read_data_dma(nandc, reg_off, data_buf + data_size1, data_size2, 0);
reg_off += data_size2;

- read_data_dma(nandc, reg_off, oob_buf + oob_size1, oob_size2, 0);
+ qcom_read_data_dma(nandc, reg_off, oob_buf + oob_size1, oob_size2, 0);

- ret = submit_descs(nandc);
+ ret = qcom_submit_descs(nandc);
if (ret) {
dev_err(nandc->dev, "failure to read raw cw %d\n", cw);
return ret;
@@ -1621,7 +578,7 @@ 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);
+ qcom_nandc_read_buffer_sync(nandc, true);

for (i = 0; i < ecc->steps; i++, buf++) {
u32 flash, buffer, erased_cw;
@@ -1750,8 +707,8 @@ static int read_page_ecc(struct qcom_nand_host *host, u8 *data_buf,
config_nand_cw_read(chip, true, i);

if (data_buf)
- read_data_dma(nandc, FLASH_BUF_ACC, data_buf,
- data_size, 0);
+ qcom_read_data_dma(nandc, FLASH_BUF_ACC, data_buf,
+ data_size, 0);

/*
* when ecc is enabled, the controller doesn't read the real
@@ -1766,8 +723,8 @@ static int read_page_ecc(struct qcom_nand_host *host, u8 *data_buf,
for (j = 0; j < host->bbm_size; j++)
*oob_buf++ = 0xff;

- read_data_dma(nandc, FLASH_BUF_ACC + data_size,
- oob_buf, oob_size, 0);
+ qcom_read_data_dma(nandc, FLASH_BUF_ACC + data_size,
+ oob_buf, oob_size, 0);
}

if (data_buf)
@@ -1776,7 +733,7 @@ static int read_page_ecc(struct qcom_nand_host *host, u8 *data_buf,
oob_buf += oob_size;
}

- ret = submit_descs(nandc);
+ ret = qcom_submit_descs(nandc);
if (ret) {
dev_err(nandc->dev, "failure to read page/oob\n");
return ret;
@@ -1797,7 +754,7 @@ static int copy_last_cw(struct qcom_nand_host *host, int page)
int size;
int ret;

- clear_read_regs(nandc);
+ qcom_clear_read_regs(nandc);

size = host->use_ecc ? host->cw_data : host->cw_size;

@@ -1809,9 +766,9 @@ static int copy_last_cw(struct qcom_nand_host *host, int page)

config_nand_single_cw_page_read(chip, host->use_ecc, ecc->steps - 1);

- read_data_dma(nandc, FLASH_BUF_ACC, nandc->data_buffer, size, 0);
+ qcom_read_data_dma(nandc, FLASH_BUF_ACC, nandc->data_buffer, size, 0);

- ret = submit_descs(nandc);
+ ret = qcom_submit_descs(nandc);
if (ret)
dev_err(nandc->dev, "failed to copy last codeword\n");

@@ -1897,14 +854,14 @@ static int qcom_nandc_read_page(struct nand_chip *chip, u8 *buf,
nandc->buf_count = 0;
nandc->buf_start = 0;
host->use_ecc = true;
- clear_read_regs(nandc);
+ qcom_clear_read_regs(nandc);
set_address(host, 0, page);
update_rw_regs(host, ecc->steps, true, 0);

data_buf = buf;
oob_buf = oob_required ? chip->oob_poi : NULL;

- clear_bam_transaction(nandc);
+ qcom_clear_bam_transaction(nandc);

return read_page_ecc(host, data_buf, oob_buf, page);
}
@@ -1945,8 +902,8 @@ static int qcom_nandc_read_oob(struct nand_chip *chip, int page)
if (host->nr_boot_partitions)
qcom_nandc_codeword_fixup(host, page);

- clear_read_regs(nandc);
- clear_bam_transaction(nandc);
+ qcom_clear_read_regs(nandc);
+ qcom_clear_bam_transaction(nandc);

host->use_ecc = true;
set_address(host, 0, page);
@@ -1973,8 +930,8 @@ static int qcom_nandc_write_page(struct nand_chip *chip, const u8 *buf,
set_address(host, 0, page);
nandc->buf_count = 0;
nandc->buf_start = 0;
- clear_read_regs(nandc);
- clear_bam_transaction(nandc);
+ qcom_clear_read_regs(nandc);
+ qcom_clear_bam_transaction(nandc);

data_buf = (u8 *)buf;
oob_buf = chip->oob_poi;
@@ -1995,8 +952,8 @@ static int qcom_nandc_write_page(struct nand_chip *chip, const u8 *buf,
oob_size = ecc->bytes;
}

- write_data_dma(nandc, FLASH_BUF_ACC, data_buf, data_size,
- i == (ecc->steps - 1) ? NAND_BAM_NO_EOT : 0);
+ qcom_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
@@ -2008,8 +965,8 @@ static int qcom_nandc_write_page(struct nand_chip *chip, const u8 *buf,
if (qcom_nandc_is_last_cw(ecc, i)) {
oob_buf += host->bbm_size;

- write_data_dma(nandc, FLASH_BUF_ACC + data_size,
- oob_buf, oob_size, 0);
+ qcom_write_data_dma(nandc, FLASH_BUF_ACC + data_size,
+ oob_buf, oob_size, 0);
}

config_nand_cw_write(chip);
@@ -2018,7 +975,7 @@ static int qcom_nandc_write_page(struct nand_chip *chip, const u8 *buf,
oob_buf += oob_size;
}

- ret = submit_descs(nandc);
+ ret = qcom_submit_descs(nandc);
if (ret) {
dev_err(nandc->dev, "failure to write page\n");
return ret;
@@ -2043,8 +1000,8 @@ static int qcom_nandc_write_page_raw(struct nand_chip *chip,
qcom_nandc_codeword_fixup(host, page);

nand_prog_page_begin_op(chip, page, 0, NULL, 0);
- clear_read_regs(nandc);
- clear_bam_transaction(nandc);
+ qcom_clear_read_regs(nandc);
+ qcom_clear_bam_transaction(nandc);

data_buf = (u8 *)buf;
oob_buf = chip->oob_poi;
@@ -2070,28 +1027,28 @@ static int qcom_nandc_write_page_raw(struct nand_chip *chip,
oob_size2 = host->ecc_bytes_hw + host->spare_bytes;
}

- write_data_dma(nandc, reg_off, data_buf, data_size1,
- NAND_BAM_NO_EOT);
+ qcom_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,
- NAND_BAM_NO_EOT);
+ qcom_write_data_dma(nandc, reg_off, oob_buf, oob_size1,
+ NAND_BAM_NO_EOT);
reg_off += oob_size1;
oob_buf += oob_size1;

- write_data_dma(nandc, reg_off, data_buf, data_size2,
- NAND_BAM_NO_EOT);
+ qcom_write_data_dma(nandc, reg_off, data_buf, data_size2,
+ NAND_BAM_NO_EOT);
reg_off += data_size2;
data_buf += data_size2;

- write_data_dma(nandc, reg_off, oob_buf, oob_size2, 0);
+ qcom_write_data_dma(nandc, reg_off, oob_buf, oob_size2, 0);
oob_buf += oob_size2;

config_nand_cw_write(chip);
}

- ret = submit_descs(nandc);
+ ret = qcom_submit_descs(nandc);
if (ret) {
dev_err(nandc->dev, "failure to write raw page\n");
return ret;
@@ -2121,7 +1078,7 @@ static int qcom_nandc_write_oob(struct nand_chip *chip, int page)
qcom_nandc_codeword_fixup(host, page);

host->use_ecc = true;
- clear_bam_transaction(nandc);
+ qcom_clear_bam_transaction(nandc);

/* calculate the data and oob size for the last codeword/step */
data_size = ecc->size - ((ecc->steps - 1) << 2);
@@ -2136,11 +1093,11 @@ static int qcom_nandc_write_oob(struct nand_chip *chip, int page)
update_rw_regs(host, 1, false, 0);

config_nand_page_write(chip);
- write_data_dma(nandc, FLASH_BUF_ACC,
- nandc->data_buffer, data_size + oob_size, 0);
+ qcom_write_data_dma(nandc, FLASH_BUF_ACC,
+ nandc->data_buffer, data_size + oob_size, 0);
config_nand_cw_write(chip);

- ret = submit_descs(nandc);
+ ret = qcom_submit_descs(nandc);
if (ret) {
dev_err(nandc->dev, "failure to write oob\n");
return ret;
@@ -2167,7 +1124,7 @@ static int qcom_nandc_block_bad(struct nand_chip *chip, loff_t ofs)
*/
host->use_ecc = false;

- clear_bam_transaction(nandc);
+ qcom_clear_bam_transaction(nandc);
ret = copy_last_cw(host, page);
if (ret)
goto err;
@@ -2194,8 +1151,8 @@ static int qcom_nandc_block_markbad(struct nand_chip *chip, loff_t ofs)
struct nand_ecc_ctrl *ecc = &chip->ecc;
int page, ret;

- clear_read_regs(nandc);
- clear_bam_transaction(nandc);
+ qcom_clear_read_regs(nandc);
+ qcom_clear_bam_transaction(nandc);

/*
* to mark the BBM as bad, we flash the entire last codeword with 0s.
@@ -2212,11 +1169,11 @@ static int qcom_nandc_block_markbad(struct nand_chip *chip, loff_t ofs)
update_rw_regs(host, 1, false, ecc->steps - 1);

config_nand_page_write(chip);
- write_data_dma(nandc, FLASH_BUF_ACC,
- nandc->data_buffer, host->cw_size, 0);
+ qcom_write_data_dma(nandc, FLASH_BUF_ACC,
+ nandc->data_buffer, host->cw_size, 0);
config_nand_cw_write(chip);

- ret = submit_descs(nandc);
+ ret = qcom_submit_descs(nandc);
if (ret) {
dev_err(nandc->dev, "failure to update BBM\n");
return ret;
@@ -2456,14 +1413,14 @@ 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)
- free_bam_transaction(nandc);
+ qcom_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) {
- nandc->bam_txn = alloc_bam_transaction(nandc);
+ nandc->bam_txn = qcom_alloc_bam_transaction(nandc);
if (!nandc->bam_txn) {
dev_err(nandc->dev,
"failed to allocate bam transaction\n");
@@ -2663,7 +1620,7 @@ 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);
+ qcom_nandc_read_buffer_sync(nandc, true);

do {
flash = le32_to_cpu(nandc->reg_read_buf[0]);
@@ -2703,23 +1660,23 @@ static int qcom_read_status_exec(struct nand_chip *chip,
nandc->buf_start = 0;
host->use_ecc = false;

- clear_read_regs(nandc);
- clear_bam_transaction(nandc);
+ qcom_clear_read_regs(nandc);
+ qcom_clear_bam_transaction(nandc);

nandc_set_reg(chip, NAND_FLASH_CMD, q_op.cmd_reg);
nandc_set_reg(chip, 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, NAND_BAM_NEXT_SGL);
+ qcom_write_reg_dma(nandc, NAND_FLASH_CMD, 1, NAND_BAM_NEXT_SGL);
+ qcom_write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);
+ qcom_read_reg_dma(nandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL);

- ret = submit_descs(nandc);
+ ret = qcom_submit_descs(nandc);
if (ret) {
dev_err(nandc->dev, "failure in submitting status descriptor\n");
goto err_out;
}

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

for (i = 0; i < num_cw; i++) {
flash_status = le32_to_cpu(nandc->reg_read_buf[i]);
@@ -2760,8 +1717,8 @@ static int qcom_read_id_type_exec(struct nand_chip *chip, const struct nand_subo
nandc->buf_start = 0;
host->use_ecc = false;

- clear_read_regs(nandc);
- clear_bam_transaction(nandc);
+ qcom_clear_read_regs(nandc);
+ qcom_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);
@@ -2771,12 +1728,12 @@ static int qcom_read_id_type_exec(struct nand_chip *chip, const struct nand_subo

nandc_set_reg(chip, 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);
+ qcom_write_reg_dma(nandc, NAND_FLASH_CMD, 4, NAND_BAM_NEXT_SGL);
+ qcom_write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);

- read_reg_dma(nandc, NAND_READ_ID, 1, NAND_BAM_NEXT_SGL);
+ qcom_read_reg_dma(nandc, NAND_READ_ID, 1, NAND_BAM_NEXT_SGL);

- ret = submit_descs(nandc);
+ ret = qcom_submit_descs(nandc);
if (ret) {
dev_err(nandc->dev, "failure in submitting read id descriptor\n");
goto err_out;
@@ -2786,7 +1743,7 @@ 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);
+ qcom_nandc_read_buffer_sync(nandc, true);
memcpy(instr->ctx.data.buf.in, nandc->reg_read_buf, len);

err_out:
@@ -2823,21 +1780,21 @@ static int qcom_misc_cmd_type_exec(struct nand_chip *chip, const struct nand_sub
nandc->buf_start = 0;
host->use_ecc = false;

- clear_read_regs(nandc);
- clear_bam_transaction(nandc);
+ qcom_clear_read_regs(nandc);
+ qcom_clear_bam_transaction(nandc);

nandc_set_reg(chip, NAND_FLASH_CMD, q_op.cmd_reg);
nandc_set_reg(chip, NAND_EXEC_CMD, 1);

- write_reg_dma(nandc, NAND_FLASH_CMD, instrs, NAND_BAM_NEXT_SGL);
- (q_op.cmd_reg == OP_BLOCK_ERASE) ? write_reg_dma(nandc, NAND_DEV0_CFG0,
- 2, NAND_BAM_NEXT_SGL) : read_reg_dma(nandc,
+ qcom_write_reg_dma(nandc, NAND_FLASH_CMD, instrs, NAND_BAM_NEXT_SGL);
+ (q_op.cmd_reg == OP_BLOCK_ERASE) ? qcom_write_reg_dma(nandc, NAND_DEV0_CFG0,
+ 2, NAND_BAM_NEXT_SGL) : qcom_read_reg_dma(nandc,
NAND_FLASH_STATUS, 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, NAND_BAM_NEXT_SGL);
+ qcom_write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);
+ qcom_read_reg_dma(nandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL);

- ret = submit_descs(nandc);
+ ret = qcom_submit_descs(nandc);
if (ret) {
dev_err(nandc->dev, "failure in submitting misc descriptor\n");
goto err_out;
@@ -2870,8 +1827,8 @@ static int qcom_param_page_type_exec(struct nand_chip *chip, const struct nand_
nandc->buf_count = 0;
nandc->buf_start = 0;
host->use_ecc = false;
- clear_read_regs(nandc);
- clear_bam_transaction(nandc);
+ qcom_clear_read_regs(nandc);
+ qcom_clear_bam_transaction(nandc);

nandc_set_reg(chip, NAND_FLASH_CMD, q_op.cmd_reg);

@@ -2914,8 +1871,8 @@ 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);
+ qcom_write_reg_dma(nandc, NAND_DEV_CMD_VLD, 1, 0);
+ qcom_write_reg_dma(nandc, NAND_DEV_CMD1, 1, NAND_BAM_NEXT_SGL);
}

nandc->buf_count = len;
@@ -2923,16 +1880,16 @@ static int qcom_param_page_type_exec(struct nand_chip *chip, const struct nand_

config_nand_single_cw_page_read(chip, false, 0);

- read_data_dma(nandc, FLASH_BUF_ACC, nandc->data_buffer,
- nandc->buf_count, 0);
+ qcom_read_data_dma(nandc, FLASH_BUF_ACC, nandc->data_buffer,
+ 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);
+ qcom_write_reg_dma(nandc, NAND_DEV_CMD1_RESTORE, 1, 0);
+ qcom_write_reg_dma(nandc, NAND_DEV_CMD_VLD_RESTORE, 1, NAND_BAM_NEXT_SGL);
}

- ret = submit_descs(nandc);
+ ret = qcom_submit_descs(nandc);
if (ret) {
dev_err(nandc->dev, "failure in submitting param page descriptor\n");
goto err_out;
@@ -3016,136 +1973,6 @@ static const struct nand_controller_ops qcom_nandc_ops = {
.exec_op = qcom_nand_exec_op,
};

-static void qcom_nandc_unalloc(struct qcom_nand_controller *nandc)
-{
- if (nandc->props->is_bam) {
- if (!dma_mapping_error(nandc->dev, nandc->reg_read_dma))
- dma_unmap_single(nandc->dev, nandc->reg_read_dma,
- MAX_REG_RD *
- sizeof(*nandc->reg_read_buf),
- DMA_FROM_DEVICE);
-
- if (nandc->tx_chan)
- dma_release_channel(nandc->tx_chan);
-
- if (nandc->rx_chan)
- dma_release_channel(nandc->rx_chan);
-
- if (nandc->cmd_chan)
- dma_release_channel(nandc->cmd_chan);
- } else {
- if (nandc->chan)
- dma_release_channel(nandc->chan);
- }
-}
-
-static int qcom_nandc_alloc(struct qcom_nand_controller *nandc)
-{
- int ret;
-
- ret = dma_set_coherent_mask(nandc->dev, DMA_BIT_MASK(32));
- if (ret) {
- dev_err(nandc->dev, "failed to set DMA mask\n");
- return ret;
- }
-
- /*
- * we use the internal buffer for reading ONFI params, reading small
- * data like ID and status, and preforming read-copy-write operations
- * when writing to a codeword partially. 532 is the maximum possible
- * size of a codeword for our nand controller
- */
- nandc->buf_size = 532;
-
- nandc->data_buffer = devm_kzalloc(nandc->dev, nandc->buf_size, GFP_KERNEL);
- if (!nandc->data_buffer)
- return -ENOMEM;
-
- nandc->regs = devm_kzalloc(nandc->dev, sizeof(*nandc->regs), GFP_KERNEL);
- if (!nandc->regs)
- return -ENOMEM;
-
- nandc->reg_read_buf = devm_kcalloc(nandc->dev, MAX_REG_RD,
- sizeof(*nandc->reg_read_buf),
- GFP_KERNEL);
- if (!nandc->reg_read_buf)
- return -ENOMEM;
-
- if (nandc->props->is_bam) {
- nandc->reg_read_dma =
- dma_map_single(nandc->dev, nandc->reg_read_buf,
- MAX_REG_RD *
- sizeof(*nandc->reg_read_buf),
- DMA_FROM_DEVICE);
- if (dma_mapping_error(nandc->dev, nandc->reg_read_dma)) {
- dev_err(nandc->dev, "failed to DMA MAP reg buffer\n");
- return -EIO;
- }
-
- nandc->tx_chan = dma_request_chan(nandc->dev, "tx");
- if (IS_ERR(nandc->tx_chan)) {
- ret = PTR_ERR(nandc->tx_chan);
- nandc->tx_chan = NULL;
- dev_err_probe(nandc->dev, ret,
- "tx DMA channel request failed\n");
- goto unalloc;
- }
-
- nandc->rx_chan = dma_request_chan(nandc->dev, "rx");
- if (IS_ERR(nandc->rx_chan)) {
- ret = PTR_ERR(nandc->rx_chan);
- nandc->rx_chan = NULL;
- dev_err_probe(nandc->dev, ret,
- "rx DMA channel request failed\n");
- goto unalloc;
- }
-
- nandc->cmd_chan = dma_request_chan(nandc->dev, "cmd");
- if (IS_ERR(nandc->cmd_chan)) {
- ret = PTR_ERR(nandc->cmd_chan);
- nandc->cmd_chan = NULL;
- dev_err_probe(nandc->dev, ret,
- "cmd DMA channel request failed\n");
- goto unalloc;
- }
-
- /*
- * Initially allocate BAM transaction to read ONFI param page.
- * After detecting all the devices, this BAM transaction will
- * be freed and the next BAM transaction will be allocated with
- * maximum codeword size
- */
- nandc->max_cwperpage = 1;
- nandc->bam_txn = alloc_bam_transaction(nandc);
- if (!nandc->bam_txn) {
- dev_err(nandc->dev,
- "failed to allocate bam transaction\n");
- ret = -ENOMEM;
- goto unalloc;
- }
- } else {
- nandc->chan = dma_request_chan(nandc->dev, "rxtx");
- if (IS_ERR(nandc->chan)) {
- ret = PTR_ERR(nandc->chan);
- nandc->chan = NULL;
- dev_err_probe(nandc->dev, ret,
- "rxtx DMA channel request failed\n");
- return ret;
- }
- }
-
- INIT_LIST_HEAD(&nandc->desc_list);
- INIT_LIST_HEAD(&nandc->host_list);
-
- nand_controller_init(&nandc->controller);
- nandc->controller.ops = &qcom_nandc_ops;
-
- return 0;
-unalloc:
- qcom_nandc_unalloc(nandc);
- return ret;
-}
-
/* one time setup of a few nand controller registers */
static int qcom_nandc_setup(struct qcom_nand_controller *nandc)
{
@@ -3427,6 +2254,9 @@ static int qcom_nandc_probe(struct platform_device *pdev)
if (ret)
goto err_nandc_alloc;

+ nand_controller_init(&nandc->controller);
+ nandc->controller.ops = &qcom_nandc_ops;
+
ret = qcom_nandc_setup(nandc);
if (ret)
goto err_setup;
@@ -3473,28 +2303,28 @@ static void qcom_nandc_remove(struct platform_device *pdev)
DMA_BIDIRECTIONAL, 0);
}

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

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

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

-static const struct qcom_nandc_props sdx55_nandc_props = {
+static struct qcom_nandc_props sdx55_nandc_props = {
.ecc_modes = (ECC_BCH_4BIT | ECC_BCH_8BIT),
.is_bam = true,
.is_qpic = true,
diff --git a/include/linux/mtd/nand-qpic-common.h b/include/linux/mtd/nand-qpic-common.h
new file mode 100644
index 000000000000..aced15866627
--- /dev/null
+++ b/include/linux/mtd/nand-qpic-common.h
@@ -0,0 +1,486 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * QCOM QPIC common APIs header file
+ *
+ * Copyright (c) 2023 Qualcomm Inc.
+ * Authors: Md sadre Alam <quic_mdalam@quicinc.com>
+ * Sricharan R <quic_srichara@quicinc.com>
+ * Varadarajan Narayanan <quic_varada@quicinc.com>
+ *
+ */
+#ifndef __MTD_NAND_QPIC_COMMON_H__
+#define __MTD_NAND_QPIC_COMMON_H__
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
+#include <linux/dma/qcom_adm.h>
+#include <linux/dma/qcom_bam_dma.h>
+#include <linux/module.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/rawnand.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+/* NANDc reg offsets */
+#define NAND_FLASH_CMD 0x00
+#define NAND_ADDR0 0x04
+#define NAND_ADDR1 0x08
+#define NAND_FLASH_CHIP_SELECT 0x0c
+#define NAND_EXEC_CMD 0x10
+#define NAND_FLASH_STATUS 0x14
+#define NAND_BUFFER_STATUS 0x18
+#define NAND_DEV0_CFG0 0x20
+#define NAND_DEV0_CFG1 0x24
+#define NAND_DEV0_ECC_CFG 0x28
+#define NAND_AUTO_STATUS_EN 0x2c
+#define NAND_DEV1_CFG0 0x30
+#define NAND_DEV1_CFG1 0x34
+#define NAND_READ_ID 0x40
+#define NAND_READ_STATUS 0x44
+#define NAND_DEV_CMD0 0xa0
+#define NAND_DEV_CMD1 0xa4
+#define NAND_DEV_CMD2 0xa8
+#define NAND_DEV_CMD_VLD 0xac
+#define SFLASHC_BURST_CFG 0xe0
+#define NAND_ERASED_CW_DETECT_CFG 0xe8
+#define NAND_ERASED_CW_DETECT_STATUS 0xec
+#define NAND_EBI2_ECC_BUF_CFG 0xf0
+#define FLASH_BUF_ACC 0x100
+
+#define NAND_CTRL 0xf00
+#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
+#define NAND_READ_LOCATION_LAST_CW_0 0xf40
+#define NAND_READ_LOCATION_LAST_CW_1 0xf44
+#define NAND_READ_LOCATION_LAST_CW_2 0xf48
+#define NAND_READ_LOCATION_LAST_CW_3 0xf4c
+
+/* dummy register offsets, used by write_reg_dma */
+#define NAND_DEV_CMD1_RESTORE 0xdead
+#define NAND_DEV_CMD_VLD_RESTORE 0xbeef
+
+/* NAND_FLASH_CMD bits */
+#define PAGE_ACC BIT(4)
+#define LAST_PAGE BIT(5)
+
+/* NAND_FLASH_CHIP_SELECT bits */
+#define NAND_DEV_SEL 0
+#define DM_EN BIT(2)
+
+/* NAND_FLASH_STATUS bits */
+#define FS_OP_ERR BIT(4)
+#define FS_READY_BSY_N BIT(5)
+#define FS_MPU_ERR BIT(8)
+#define FS_DEVICE_STS_ERR BIT(16)
+#define FS_DEVICE_WP BIT(23)
+
+/* NAND_BUFFER_STATUS bits */
+#define BS_UNCORRECTABLE_BIT BIT(8)
+#define BS_CORRECTABLE_ERR_MSK 0x1f
+
+/* NAND_DEVn_CFG0 bits */
+#define DISABLE_STATUS_AFTER_WRITE 4
+#define CW_PER_PAGE 6
+#define UD_SIZE_BYTES 9
+#define UD_SIZE_BYTES_MASK GENMASK(18, 9)
+#define ECC_PARITY_SIZE_BYTES_RS 19
+#define SPARE_SIZE_BYTES 23
+#define SPARE_SIZE_BYTES_MASK GENMASK(26, 23)
+#define NUM_ADDR_CYCLES 27
+#define STATUS_BFR_READ 30
+#define SET_RD_MODE_AFTER_STATUS 31
+
+/* NAND_DEVn_CFG0 bits */
+#define DEV0_CFG1_ECC_DISABLE 0
+#define WIDE_FLASH 1
+#define NAND_RECOVERY_CYCLES 2
+#define CS_ACTIVE_BSY 5
+#define BAD_BLOCK_BYTE_NUM 6
+#define BAD_BLOCK_IN_SPARE_AREA 16
+#define WR_RD_BSY_GAP 17
+#define ENABLE_BCH_ECC 27
+
+/* NAND_DEV0_ECC_CFG bits */
+#define ECC_CFG_ECC_DISABLE 0
+#define ECC_SW_RESET 1
+#define ECC_MODE 4
+#define ECC_PARITY_SIZE_BYTES_BCH 8
+#define ECC_NUM_DATA_BYTES 16
+#define ECC_NUM_DATA_BYTES_MASK GENMASK(25, 16)
+#define ECC_FORCE_CLK_OPEN 30
+
+/* NAND_DEV_CMD1 bits */
+#define READ_ADDR 0
+
+/* NAND_DEV_CMD_VLD bits */
+#define READ_START_VLD BIT(0)
+#define READ_STOP_VLD BIT(1)
+#define WRITE_START_VLD BIT(2)
+#define ERASE_START_VLD BIT(3)
+#define SEQ_READ_START_VLD BIT(4)
+
+/* NAND_EBI2_ECC_BUF_CFG bits */
+#define NUM_STEPS 0
+
+/* NAND_ERASED_CW_DETECT_CFG bits */
+#define ERASED_CW_ECC_MASK 1
+#define AUTO_DETECT_RES 0
+#define MASK_ECC BIT(ERASED_CW_ECC_MASK)
+#define RESET_ERASED_DET BIT(AUTO_DETECT_RES)
+#define ACTIVE_ERASED_DET (0 << AUTO_DETECT_RES)
+#define CLR_ERASED_PAGE_DET (RESET_ERASED_DET | MASK_ECC)
+#define SET_ERASED_PAGE_DET (ACTIVE_ERASED_DET | MASK_ECC)
+
+/* NAND_ERASED_CW_DETECT_STATUS bits */
+#define PAGE_ALL_ERASED BIT(7)
+#define CODEWORD_ALL_ERASED BIT(6)
+#define PAGE_ERASED BIT(5)
+#define CODEWORD_ERASED BIT(4)
+#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
+#define NAND_VERSION_MINOR_MASK 0x0fff0000
+#define NAND_VERSION_MINOR_SHIFT 16
+
+/* NAND OP_CMDs */
+#define OP_PAGE_READ 0x2
+#define OP_PAGE_READ_WITH_ECC 0x3
+#define OP_PAGE_READ_WITH_ECC_SPARE 0x4
+#define OP_PAGE_READ_ONFI_READ 0x5
+#define OP_PROGRAM_PAGE 0x6
+#define OP_PAGE_PROGRAM_WITH_ECC 0x7
+#define OP_PROGRAM_PAGE_SPARE 0x9
+#define OP_BLOCK_ERASE 0xa
+#define OP_CHECK_STATUS 0xc
+#define OP_FETCH_ID 0xb
+#define OP_RESET_DEVICE 0xd
+
+/* Default Value for NAND_DEV_CMD_VLD */
+#define NAND_DEV_CMD_VLD_VAL (READ_START_VLD | WRITE_START_VLD | \
+ ERASE_START_VLD | SEQ_READ_START_VLD)
+
+/* NAND_CTRL bits */
+#define BAM_MODE_EN BIT(0)
+
+/*
+ * the NAND controller performs reads/writes with ECC in 516 byte chunks.
+ * the driver calls the chunks 'step' or 'codeword' interchangeably
+ */
+#define NANDC_STEP_SIZE 512
+
+/*
+ * the largest page size we support is 8K, this will have 16 steps/codewords
+ * of 512 bytes each
+ */
+#define MAX_NUM_STEPS (SZ_8K / NANDC_STEP_SIZE)
+
+/* we read at most 3 registers per codeword scan */
+#define MAX_REG_RD (3 * MAX_NUM_STEPS)
+
+#define QPIC_PER_CW_CMD_ELEMENTS 32
+#define QPIC_PER_CW_CMD_SGL 32
+#define QPIC_PER_CW_DATA_SGL 8
+
+#define QPIC_NAND_COMPLETION_TIMEOUT msecs_to_jiffies(2000)
+
+/*
+ * Flags used in DMA descriptor preparation helper functions
+ * (i.e. read_reg_dma/write_reg_dma/read_data_dma/write_data_dma)
+ */
+/* Don't set the EOT in current tx BAM sgl */
+#define NAND_BAM_NO_EOT BIT(0)
+/* Set the NWD flag in current BAM sgl */
+#define NAND_BAM_NWD BIT(1)
+/* Finish writing in the current BAM sgl and start writing in another BAM sgl */
+#define NAND_BAM_NEXT_SGL BIT(2)
+
+/*
+ * 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)
+ */
+#define dev_cmd_reg_addr(nandc, reg) ((nandc)->props->dev_cmd_reg_start + (reg))
+
+/* Returns the NAND register physical address */
+#define nandc_reg_phys(chip, offset) ((chip)->base_phys + (offset))
+
+/* Returns the dma address for reg read buffer */
+#define reg_buf_dma_addr(chip, vaddr) \
+ ((chip)->reg_read_dma + \
+ ((u8 *)(vaddr) - (u8 *)(chip)->reg_read_buf))
+
+/*
+ * Erased codeword status is being used two times in single transfer so this
+ * flag will determine the current value of erased codeword status register
+ */
+#define NAND_ERASED_CW_SET BIT(4)
+
+#define MAX_ADDRESS_CYCLE 5
+
+/*
+ * This data type corresponds to the BAM transaction which will be used for all
+ * NAND transfers.
+ * @bam_ce - the array of BAM command elements
+ * @cmd_sgl - sgl for NAND BAM command pipe
+ * @data_sgl - sgl for NAND BAM consumer/producer pipe
+ * @last_data_desc - last DMA desc in data channel (tx/rx).
+ * @last_cmd_desc - last DMA desc in command channel.
+ * @txn_done - completion for NAND transfer.
+ * @bam_ce_pos - the index in bam_ce which is available for next sgl
+ * @bam_ce_start - the index in bam_ce which marks the start position ce
+ * for current sgl. It will be used for size calculation
+ * for current sgl
+ * @cmd_sgl_pos - current index in command sgl.
+ * @cmd_sgl_start - start index in command sgl.
+ * @tx_sgl_pos - current index in data sgl for tx.
+ * @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;
+ struct scatterlist *cmd_sgl;
+ struct scatterlist *data_sgl;
+ struct dma_async_tx_descriptor *last_data_desc;
+ struct dma_async_tx_descriptor *last_cmd_desc;
+ struct completion txn_done;
+ u32 bam_ce_pos;
+ u32 bam_ce_start;
+ u32 cmd_sgl_pos;
+ u32 cmd_sgl_start;
+ u32 tx_sgl_pos;
+ u32 tx_sgl_start;
+ u32 rx_sgl_pos;
+ u32 rx_sgl_start;
+ bool wait_second_completion;
+};
+
+/*
+ * This data type corresponds to the nand dma descriptor
+ * @dma_desc - low level DMA engine descriptor
+ * @list - list for desc_info
+ *
+ * @adm_sgl - sgl which will be used for single sgl dma descriptor. Only used by
+ * ADM
+ * @bam_sgl - sgl which will be used for dma descriptor. Only used by BAM
+ * @sgl_cnt - number of SGL in bam_sgl. Only used by BAM
+ * @dir - DMA transfer direction
+ */
+struct desc_info {
+ struct dma_async_tx_descriptor *dma_desc;
+ struct list_head node;
+
+ union {
+ struct scatterlist adm_sgl;
+ struct {
+ struct scatterlist *bam_sgl;
+ int sgl_cnt;
+ };
+ };
+ enum dma_data_direction dir;
+};
+
+/*
+ * holds the current register values that we want to write. acts as a contiguous
+ * chunk of memory which we use to write the controller registers through DMA.
+ */
+struct nandc_regs {
+ __le32 cmd;
+ __le32 addr0;
+ __le32 addr1;
+ __le32 chip_sel;
+ __le32 exec;
+
+ __le32 cfg0;
+ __le32 cfg1;
+ __le32 ecc_bch_cfg;
+
+ __le32 clrflashstatus;
+ __le32 clrreadstatus;
+
+ __le32 cmd1;
+ __le32 vld;
+
+ __le32 orig_cmd1;
+ __le32 orig_vld;
+
+ __le32 ecc_buf_cfg;
+ __le32 read_location0;
+ __le32 read_location1;
+ __le32 read_location2;
+ __le32 read_location3;
+ __le32 read_location_last0;
+ __le32 read_location_last1;
+ __le32 read_location_last2;
+ __le32 read_location_last3;
+
+ __le32 erased_cw_detect_cfg_clr;
+ __le32 erased_cw_detect_cfg_set;
+};
+
+/*
+ * NAND controller data struct
+ *
+ * @dev: parent device
+ *
+ * @base: MMIO base
+ *
+ * @core_clk: controller clock
+ * @aon_clk: another controller clock
+ *
+ * @regs: a contiguous chunk of memory for DMA register
+ * writes. contains the register values to be
+ * written to controller
+ *
+ * @props: properties of current NAND controller,
+ * initialized via DT match data
+ *
+ * @controller: base controller structure
+ * @host_list: list containing all the chips attached to the
+ * controller
+ *
+ * @chan: dma channel
+ * @cmd_crci: ADM DMA CRCI for command flow control
+ * @data_crci: ADM DMA CRCI for data flow control
+ *
+ * @desc_list: DMA descriptor list (list of desc_infos)
+ *
+ * @data_buffer: our local DMA buffer for page read/writes,
+ * used when we can't use the buffer provided
+ * by upper layers directly
+ * @reg_read_buf: local buffer for reading back registers via DMA
+ *
+ * @base_phys: physical base address of controller registers
+ * @base_dma: dma base address of controller registers
+ * @reg_read_dma: contains dma address for register read buffer
+ *
+ * @buf_size/count/start: markers for chip->legacy.read_buf/write_buf
+ * functions
+ * @max_cwperpage: maximum QPIC codewords required. calculated
+ * from all connected NAND devices pagesize
+ *
+ * @reg_read_pos: marker for data read in reg_read_buf
+ *
+ * @cmd1/vld: some fixed controller register values
+ *
+ * @exec_opwrite: flag to select correct number of code word
+ * while reading status
+ */
+struct qcom_nand_controller {
+ struct device *dev;
+
+ void __iomem *base;
+
+ struct clk *core_clk;
+ struct clk *aon_clk;
+
+ struct nandc_regs *regs;
+ struct bam_transaction *bam_txn;
+
+ const struct qcom_nandc_props *props;
+
+ struct nand_controller controller;
+ struct list_head host_list;
+
+ union {
+ /* will be used only by QPIC for BAM DMA */
+ struct {
+ struct dma_chan *tx_chan;
+ struct dma_chan *rx_chan;
+ struct dma_chan *cmd_chan;
+ };
+
+ /* will be used only by EBI2 for ADM DMA */
+ struct {
+ struct dma_chan *chan;
+ unsigned int cmd_crci;
+ unsigned int data_crci;
+ };
+ };
+
+ struct list_head desc_list;
+
+ u8 *data_buffer;
+ __le32 *reg_read_buf;
+
+ phys_addr_t base_phys;
+ dma_addr_t base_dma;
+ dma_addr_t reg_read_dma;
+
+ int buf_size;
+ int buf_count;
+ int buf_start;
+ unsigned int max_cwperpage;
+
+ int reg_read_pos;
+
+ u32 cmd1, vld;
+ bool exec_opwrite;
+};
+
+/*
+ * This data type corresponds to the NAND controller properties which varies
+ * 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
+ * @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 use_codeword_fixup;
+};
+
+void config_nand_page_read(struct nand_chip *chip);
+void qcom_qpic_bam_dma_done(void *data);
+void qcom_nandc_read_buffer_sync(struct qcom_nand_controller *nandc, bool is_cpu);
+__le32 *qcom_offset_to_nandc_reg(struct nandc_regs *regs, int offset);
+int qcom_prep_adm_dma_desc(struct qcom_nand_controller *nandc, bool read,
+ int reg_off, const void *vaddr, int size,
+ bool flow_control);
+int qcom_submit_descs(struct qcom_nand_controller *nandc);
+int qcom_prepare_bam_async_desc(struct qcom_nand_controller *nandc,
+ struct dma_chan *chan, unsigned long flags);
+int qcom_prep_bam_dma_desc_cmd(struct qcom_nand_controller *nandc, bool read,
+ int reg_off, const void *vaddr,
+ int size, unsigned int flags);
+int qcom_prep_bam_dma_desc_data(struct qcom_nand_controller *nandc, bool read,
+ const void *vaddr,
+ int size, unsigned int flags);
+int qcom_read_reg_dma(struct qcom_nand_controller *nandc, int first,
+ int num_regs, unsigned int flags);
+int qcom_write_reg_dma(struct qcom_nand_controller *nandc, int first,
+ int num_regs, unsigned int flags);
+int qcom_read_data_dma(struct qcom_nand_controller *nandc, int reg_off,
+ const u8 *vaddr, int size, unsigned int flags);
+int qcom_write_data_dma(struct qcom_nand_controller *nandc, int reg_off,
+ const u8 *vaddr, int size, unsigned int flags);
+struct bam_transaction *qcom_alloc_bam_transaction(struct qcom_nand_controller *nandc);
+void qcom_clear_bam_transaction(struct qcom_nand_controller *nandc);
+void qcom_nandc_unalloc(struct qcom_nand_controller *nandc);
+int qcom_nandc_alloc(struct qcom_nand_controller *nandc);
+void qcom_clear_read_regs(struct qcom_nand_controller *nandc);
+void qcom_free_bam_transaction(struct qcom_nand_controller *nandc);
+#endif
--
2.34.1