soc/marvell/mvmap2315: Add NVM driver

This driver uses BootROM callback to read and write
to the nvm using I2C.

Testing: booted successfully.

Change-Id: I8639af3e004f6631d7e596507c106159835f979f
Signed-off-by: Hakim Giydan <hgiydan@marvell.com>
Reviewed-on: https://review.coreboot.org/16161
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

src/soc/marvell/mvmap2315/Makefile.inc

@@ -27,6 +27,7 @@ bootblock-y += gpio.c
 bootblock-y += flash.c
 bootblock-y += load_validate.c
 bootblock-y += media.c
+bootblock-y += nvm.c
 bootblock-y += pinmux.c
 bootblock-y += pmic.c
 bootblock-y += reset.c

src/soc/marvell/mvmap2315/include/soc/nvm.h

@@ -0,0 +1,27 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Marvell, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#ifndef __SOC_MARVELL_MVMAP2315_NVM_H__
+#define __SOC_MARVELL_MVMAP2315_NVM_H__
+
+#include <stdint.h>
+
+#define MVMAP2315_NVM_LOCKDOWN_FLAG	BIT(0)
+
+u32 nvm_init(void);
+u32 nvm_read(u32 offset, u32 *buffer, u32 size);
+u32 nvm_write(u32 offset, u32 *buffer, u32 size);
+void nvm_lockdown(void);
+
+#endif /* __SOC_MARVELL_MVMAP2315_NVM_H__ */

src/soc/marvell/mvmap2315/nvm.c

@@ -0,0 +1,105 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Marvell, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <arch/io.h>
+#include <console/console.h>
+#include <soc/bdb.h>
+#include <soc/clock.h>
+#include <soc/flash.h>
+#include <soc/load_validate.h>
+#include <soc/nvm.h>
+
+struct flash_ops nvm_callbacks = {
+	.init = (void *)MVMAP2315_FLASH_INIT,
+	.read = (void *)MVMAP2315_FLASH_READ,
+	.write = (void *)MVMAP2315_FLASH_WRITE,
+};
+
+static void set_nvm_parameters(struct flash_params *eeprom_info, u32 offset,
+			       u32 *buffer, u32 size)
+{
+	eeprom_info->offset = offset;
+	eeprom_info->buff = (u32)buffer;
+	eeprom_info->size = size;
+	eeprom_info->id = 0x0;
+	eeprom_info->partition = 0x0;
+}
+
+u32 nvm_init(void)
+{
+	int rc;
+
+	clrbits_le32(&mvmap2315_apmu_clk->apaonclk_sdmmc_clkgenconfig,
+		     MVMAP2315_SDMMC_CLK_RSTN);
+	setbits_le32(&mvmap2315_apmu_clk->apaonclk_sdmmc_clkgenconfig,
+		     MVMAP2315_SDMMC_CLK_RSTN);
+
+	rc = nvm_callbacks.init(MVMAP2315_EEPROM, 0, 0);
+
+	if (rc)
+		printk(BIOS_DEBUG, "nvm_init failed with rc=%x.\n", rc);
+
+	return rc;
+}
+
+u32 nvm_read(u32 offset, u32 *buffer, u32 size)
+{
+	struct flash_params eeprom_read_info;
+	u32 rc;
+
+	set_nvm_parameters(&eeprom_read_info, offset, buffer, size);
+
+	rc = nvm_init();
+
+	if (rc)
+		return rc;
+
+	rc = nvm_callbacks.read(MVMAP2315_EEPROM, 0, &eeprom_read_info);
+
+	if (rc)
+		printk(BIOS_INFO, "nvm_read callback failed, rc=%x\n", rc);
+
+	return rc;
+}
+
+u32 nvm_write(u32 offset, u32 *buffer, u32 size)
+{
+	struct flash_params eeprom_read_info;
+	u32 rc;
+
+	set_nvm_parameters(&eeprom_read_info, offset, buffer, size);
+
+	rc = nvm_init();
+
+	if (rc)
+		return rc;
+
+	rc = nvm_callbacks.write(MVMAP2315_EEPROM, 0, &eeprom_read_info);
+
+	if (rc)
+		printk(BIOS_INFO, "nvm_write callback failed, rc=%x\n", rc);
+
+	return rc;
+}
+
+void nvm_lockdown(void)
+{
+	setbits_le32(&mvmap2315_mcu_secconfig->boot_hw_lockdown_nvm,
+		     MVMAP2315_NVM_LOCKDOWN_FLAG);
+}