From 102b0d2daa97dae68d3eed54d8fe37a9cc38a892 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 28 Apr 2024 11:13:47 +0200
Subject: Adding upstream version 2.8.0+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 drivers/renesas/common/emmc/emmc_read.c | 130 ++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 drivers/renesas/common/emmc/emmc_read.c

(limited to 'drivers/renesas/common/emmc/emmc_read.c')

diff --git a/drivers/renesas/common/emmc/emmc_read.c b/drivers/renesas/common/emmc/emmc_read.c
new file mode 100644
index 0000000..96e73ca
--- /dev/null
+++ b/drivers/renesas/common/emmc/emmc_read.c
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2015-2020, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch_helpers.h>
+
+#include "emmc_config.h"
+#include "emmc_def.h"
+#include "emmc_hal.h"
+#include "emmc_registers.h"
+#include "emmc_std.h"
+
+#define MIN_EMMC(a, b)	(((a) < (b)) ? (a) : (b))
+#define EMMC_RW_SECTOR_COUNT_MAX	0x0000ffffU
+
+static EMMC_ERROR_CODE emmc_multiple_block_read(uint32_t *buff_address_virtual,
+		uint32_t sector_number, uint32_t count,
+		HAL_MEMCARD_DATA_TRANSFER_MODE transfer_mode)
+{
+	EMMC_ERROR_CODE result;
+
+	/* parameter check */
+	if ((count > EMMC_RW_SECTOR_COUNT_MAX)
+	    || (count == 0)
+	    || ((transfer_mode != HAL_MEMCARD_DMA)
+		&& (transfer_mode != HAL_MEMCARD_NOT_DMA))
+	    ) {
+		emmc_write_error_info(EMMC_FUNCNO_READ_SECTOR, EMMC_ERR_PARAM);
+		return EMMC_ERR_PARAM;
+	}
+
+	/* CMD23 */
+	emmc_make_nontrans_cmd(CMD23_SET_BLOCK_COUNT, count);
+	result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
+	if (result != EMMC_SUCCESS) {
+		return result;
+	}
+	SETR_32(SD_SECCNT, count);
+	SETR_32(SD_STOP, 0x00000100);
+	/* SD_BUF Read/Write DMA Transfer enable */
+	SETR_32(CC_EXT_MODE, (CC_EXT_MODE_CLEAR | CC_EXT_MODE_DMASDRW_ENABLE));
+
+	/* CMD18 */
+	emmc_make_trans_cmd(CMD18_READ_MULTIPLE_BLOCK, sector_number,
+			    buff_address_virtual,
+			    count << EMMC_SECTOR_SIZE_SHIFT, HAL_MEMCARD_READ,
+			    transfer_mode);
+	result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
+	if (result != EMMC_SUCCESS) {
+		return result;	/* CMD18 error code */
+	}
+
+	/* CMD13 */
+	emmc_make_nontrans_cmd(CMD13_SEND_STATUS, EMMC_RCA << 16);
+	result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
+	if (result != EMMC_SUCCESS) {
+		return result;
+	}
+#if RCAR_BL2_DCACHE == 1
+	if (transfer_mode == HAL_MEMCARD_NOT_DMA) {
+		flush_dcache_range((uint64_t) buff_address_virtual,
+				   ((size_t) count << EMMC_SECTOR_SIZE_SHIFT));
+	}
+#endif /* RCAR_BL2_DCACHE == 1 */
+
+	/* ready status check */
+	if ((mmc_drv_obj.r1_card_status & EMMC_R1_READY) == 0) {
+		emmc_write_error_info(EMMC_FUNCNO_READ_SECTOR,
+				      EMMC_ERR_CARD_BUSY);
+		return EMMC_ERR_CARD_BUSY;
+	}
+
+	/* state check */
+	if (mmc_drv_obj.current_state != EMMC_R1_STATE_TRAN) {
+		emmc_write_error_info(EMMC_FUNCNO_READ_SECTOR,
+				      EMMC_ERR_CARD_STATE);
+		return EMMC_ERR_CARD_STATE;
+	}
+
+	return EMMC_SUCCESS;
+}
+
+EMMC_ERROR_CODE emmc_read_sector(uint32_t *buff_address_virtual,
+				 uint32_t sector_number,
+				 uint32_t count, uint32_t feature_flags)
+{
+	uint32_t trans_count;
+	uint32_t remain;
+	EMMC_ERROR_CODE result;
+	HAL_MEMCARD_DATA_TRANSFER_MODE transfer_mode;
+
+	/* parameter check */
+	if (count == 0) {
+		emmc_write_error_info(EMMC_FUNCNO_READ_SECTOR, EMMC_ERR_PARAM);
+		return EMMC_ERR_PARAM;
+	}
+
+	/* state check */
+	if (mmc_drv_obj.mount != TRUE) {
+		emmc_write_error_info(EMMC_FUNCNO_READ_SECTOR, EMMC_ERR_STATE);
+		return EMMC_ERR_STATE;
+	}
+
+	/* DMA? */
+	if ((feature_flags & LOADIMAGE_FLAGS_DMA_ENABLE) != 0) {
+		transfer_mode = HAL_MEMCARD_DMA;
+	} else {
+		transfer_mode = HAL_MEMCARD_NOT_DMA;
+	}
+
+	remain = count;
+	while (remain != 0) {
+		trans_count = MIN_EMMC(remain, EMMC_RW_SECTOR_COUNT_MAX);
+		result =
+		    emmc_multiple_block_read(buff_address_virtual,
+					     sector_number, trans_count,
+					     transfer_mode);
+		if (result != EMMC_SUCCESS) {
+			return result;
+		}
+
+		buff_address_virtual += (EMMC_BLOCK_LENGTH_DW * trans_count);
+		sector_number += trans_count;
+		remain -= trans_count;
+	}
+
+	return EMMC_SUCCESS;
+}
-- 
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