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Commit 59af49a9 authored by Pradeep P V K's avatar Pradeep P V K
Browse files

mtd: msm_qpic_nand: Remove the SW workaround on sdxlemur 



Software workaround for Pagescope read feature was no more
needed on sdxlemur. Hence remove the SW workaround.

Change-Id: Iafde459c9270c3ff208e6464fcad5440bbe62594
Signed-off-by: default avatarPradeep P V K <pragalla@codeaurora.org>
parent a61e7f34

drivers/mtd/devices/msm_qpic_nand.c

+11 −29
Original line number Diff line number Diff line
@@ -1711,7 +1711,6 @@ static int msm_nand_is_erased_page_ps(struct mtd_info *mtd, loff_t from, 
	uint32_t n = 0, num_zero_bits = 0, total_ecc_byte_cnt;

	struct msm_nand_rw_reg_data data;

	struct sps_iovec *iovec;

	struct msm_nand_sps_cmd *sps_cmd;

	struct sps_iovec iovec_temp;

	struct mtd_oob_ops raw_ops;
@@ -1726,7 +1725,6 @@ static int msm_nand_is_erased_page_ps(struct mtd_info *mtd, loff_t from, 
	struct msm_nand_read_status_desc *status_desc = NULL;

	uint32_t flash_cmd = 0x0;

	struct {

		struct msm_nand_sps_cmd cmd;

		struct sps_transfer xfer;

		struct sps_iovec cmd_iovec[MAX_DESC];

		struct {
@@ -1751,7 +1749,6 @@ static int msm_nand_is_erased_page_ps(struct mtd_info *mtd, loff_t from, 
	wait_event(chip->dma_wait_queue, (dma_buffer = msm_nand_get_dma_buffer(

					chip, sizeof(*dma_buffer))));



	sps_cmd = &dma_buffer->cmd;

	memset(&data, 0, sizeof(struct msm_nand_rw_reg_data));

	msm_nand_update_rw_reg_data(chip, &raw_ops, rw_params, &data);
@@ -1771,6 +1768,8 @@ static int msm_nand_is_erased_page_ps(struct mtd_info *mtd, loff_t from, 
		dma_map_single(chip->dev, ecc, total_ecc_byte_cnt,

				DMA_FROM_DEVICE);



	uint32_t cw_desc_cnt = 1;

	struct sps_command_element *curr_ce, *start_ce;

	data.addr0 = (rw_params->page << 16) | rw_params->oob_col;

	data.addr1 = (rw_params->page >> 16) & 0xff;

	for (n = rw_params->start_sector; n < cwperpage; n++) {
@@ -1781,6 +1780,15 @@ static int msm_nand_is_erased_page_ps(struct mtd_info *mtd, loff_t from, 
	msm_nand_prep_read_cmd_desc_pagescope(&raw_ops, rw_params, &data,

			info, cmd_list, chip->ecc_parity_bytes);



	start_ce = &cmd_list->cw_desc[cw_desc_cnt].ce[0];

	curr_ce = start_ce;

	cmd_list->cw_desc[cw_desc_cnt].flags = CMD | INT_UNLCK;

	cmd_list->count++;

	msm_nand_prep_ce(curr_ce, MSM_NAND_AUTO_STATUS_EN(info),

			WRITE, flash_cmd);

	curr_ce++;

	cmd_list->cw_desc[cw_desc_cnt].num_ce = curr_ce - start_ce;



	dma_buffer->xfer.iovec_count = cmd_list->count;

	dma_buffer->xfer.iovec = dma_buffer->cmd_iovec;

	dma_buffer->xfer.iovec_phys = msm_virt_to_dma(chip,
@@ -1868,29 +1876,6 @@ static int msm_nand_is_erased_page_ps(struct mtd_info *mtd, loff_t from, 
				(info->sps.data_prod_stat.index), err);

		goto put_dev;

	}

	/*

	 * There is a H/W BUG in qpic 2.0. You should unlock the command

	 * pipe only after all the status descriptors are collected on

	 * status descriptor pipe (pipe#3).

	 */



	/* Unlock the command pipe now */

	msm_nand_prep_single_desc(sps_cmd, MSM_NAND_AUTO_STATUS_EN(info),

			WRITE, flash_cmd, INT_UNLCK);

	err = sps_transfer_one(info->sps.cmd_pipe.handle,

			msm_virt_to_dma(chip, &sps_cmd->ce),

			sizeof(struct sps_command_element), NULL,

			sps_cmd->flags);

	if (err) {

		pr_err("Failed to unlock cmd desc. pipe: %d\n", err);

		goto put_dev;

	}

	err = msm_nand_sps_get_iovec(info->sps.cmd_pipe.handle,

			info->sps.cmd_pipe.index, 1, &iovec_temp);

	if (err) {

		pr_err("Failed to get iovec for cmd desc. err:%d\n", err);

		goto put_dev;

	}

	err = msm_nand_put_device(chip->dev);

	mutex_unlock(&info->lock);

	if (err)
@@ -1963,7 +1948,6 @@ static int msm_nand_read_pagescope(struct mtd_info *mtd, loff_t from, 
	struct msm_nand_rw_params rw_params;

	struct msm_nand_rw_reg_data data;

	struct sps_iovec *iovec;

	struct msm_nand_sps_cmd *sps_cmd;

	struct sps_iovec iovec_temp;

	bool erased_page;

	uint64_t fix_data_in_pages = 0;
@@ -1976,7 +1960,6 @@ static int msm_nand_read_pagescope(struct mtd_info *mtd, loff_t from, 
	 * read_location_last_cw_1, exec.

	 */

	struct {

		struct msm_nand_sps_cmd cmd;

		struct sps_transfer xfer;

		struct sps_iovec cmd_iovec[MAX_DESC];

		struct {
@@ -2005,7 +1988,6 @@ static int msm_nand_read_pagescope(struct mtd_info *mtd, loff_t from, 
	rw_params.oob_col = rw_params.start_sector * chip->cw_size;

	if (chip->cfg1 & (1 << WIDE_FLASH))

		rw_params.oob_col >>= 1;

	sps_cmd = &dma_buffer->cmd;



	memset(&data, 0, sizeof(struct msm_nand_rw_reg_data));

	msm_nand_update_rw_reg_data(chip, ops, &rw_params, &data);