mmc: Move MMC boot code into its own file

Rather than having an #ifdef in the main mmc.c file, control this feature
from the Makefile by moving the code into its own file.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/mmc/Makefile

@@ -25,6 +25,9 @@ obj-$(CONFIG_FSL_ESDHC) += fsl_esdhc.o
 obj-$(CONFIG_FTSDC010) += ftsdc010_mci.o
 obj-$(CONFIG_FTSDC021) += ftsdc021_sdhci.o
 obj-$(CONFIG_GENERIC_MMC) += mmc.o
+ifdef CONFIG_SUPPORT_EMMC_BOOT
+obj-$(CONFIG_GENERIC_MMC) += mmc_boot.o
+endif
 obj-$(CONFIG_GENERIC_ATMEL_MCI) += gen_atmel_mci.o
 obj-$(CONFIG_KONA_SDHCI) += kona_sdhci.o
 obj-$(CONFIG_MMC_SPI) += mmc_spi.o

drivers/mmc/mmc.c

@@ -463,8 +463,7 @@ static int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd)
 	return err;
 }
 
-
-static int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
+int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
 {
 	struct mmc_cmd cmd;
 	int timeout = 1000;
@@ -1686,126 +1685,3 @@ int mmc_initialize(bd_t *bis)
 	mmc_do_preinit();
 	return 0;
 }
-
-#ifdef CONFIG_SUPPORT_EMMC_BOOT
-/*
- * This function changes the size of boot partition and the size of rpmb
- * partition present on EMMC devices.
- *
- * Input Parameters:
- * struct *mmc: pointer for the mmc device strcuture
- * bootsize: size of boot partition
- * rpmbsize: size of rpmb partition
- *
- * Returns 0 on success.
- */
-
-int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
-				unsigned long rpmbsize)
-{
-	int err;
-	struct mmc_cmd cmd;
-
-	/* Only use this command for raw EMMC moviNAND. Enter backdoor mode */
-	cmd.cmdidx = MMC_CMD_RES_MAN;
-	cmd.resp_type = MMC_RSP_R1b;
-	cmd.cmdarg = MMC_CMD62_ARG1;
-
-	err = mmc_send_cmd(mmc, &cmd, NULL);
-	if (err) {
-		debug("mmc_boot_partition_size_change: Error1 = %d\n", err);
-		return err;
-	}
-
-	/* Boot partition changing mode */
-	cmd.cmdidx = MMC_CMD_RES_MAN;
-	cmd.resp_type = MMC_RSP_R1b;
-	cmd.cmdarg = MMC_CMD62_ARG2;
-
-	err = mmc_send_cmd(mmc, &cmd, NULL);
-	if (err) {
-		debug("mmc_boot_partition_size_change: Error2 = %d\n", err);
-		return err;
-	}
-	/* boot partition size is multiple of 128KB */
-	bootsize = (bootsize * 1024) / 128;
-
-	/* Arg: boot partition size */
-	cmd.cmdidx = MMC_CMD_RES_MAN;
-	cmd.resp_type = MMC_RSP_R1b;
-	cmd.cmdarg = bootsize;
-
-	err = mmc_send_cmd(mmc, &cmd, NULL);
-	if (err) {
-		debug("mmc_boot_partition_size_change: Error3 = %d\n", err);
-		return err;
-	}
-	/* RPMB partition size is multiple of 128KB */
-	rpmbsize = (rpmbsize * 1024) / 128;
-	/* Arg: RPMB partition size */
-	cmd.cmdidx = MMC_CMD_RES_MAN;
-	cmd.resp_type = MMC_RSP_R1b;
-	cmd.cmdarg = rpmbsize;
-
-	err = mmc_send_cmd(mmc, &cmd, NULL);
-	if (err) {
-		debug("mmc_boot_partition_size_change: Error4 = %d\n", err);
-		return err;
-	}
-	return 0;
-}
-
-/*
- * Modify EXT_CSD[177] which is BOOT_BUS_WIDTH
- * based on the passed in values for BOOT_BUS_WIDTH, RESET_BOOT_BUS_WIDTH
- * and BOOT_MODE.
- *
- * Returns 0 on success.
- */
-int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode)
-{
-	int err;
-
-	err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_BUS_WIDTH,
-			 EXT_CSD_BOOT_BUS_WIDTH_MODE(mode) |
-			 EXT_CSD_BOOT_BUS_WIDTH_RESET(reset) |
-			 EXT_CSD_BOOT_BUS_WIDTH_WIDTH(width));
-
-	if (err)
-		return err;
-	return 0;
-}
-
-/*
- * Modify EXT_CSD[179] which is PARTITION_CONFIG (formerly BOOT_CONFIG)
- * based on the passed in values for BOOT_ACK, BOOT_PARTITION_ENABLE and
- * PARTITION_ACCESS.
- *
- * Returns 0 on success.
- */
-int mmc_set_part_conf(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
-{
-	int err;
-
-	err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
-			 EXT_CSD_BOOT_ACK(ack) |
-			 EXT_CSD_BOOT_PART_NUM(part_num) |
-			 EXT_CSD_PARTITION_ACCESS(access));
-
-	if (err)
-		return err;
-	return 0;
-}
-
-/*
- * Modify EXT_CSD[162] which is RST_n_FUNCTION based on the given value
- * for enable.  Note that this is a write-once field for non-zero values.
- *
- * Returns 0 on success.
- */
-int mmc_set_rst_n_function(struct mmc *mmc, u8 enable)
-{
-	return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_RST_N_FUNCTION,
-			  enable);
-}
-#endif

drivers/mmc/mmc_boot.c

@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2016 Google, Inc
+ * Written by Amar <amarendra.xt@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <mmc.h>
+#include "mmc_private.h"
+
+/*
+ * This function changes the size of boot partition and the size of rpmb
+ * partition present on EMMC devices.
+ *
+ * Input Parameters:
+ * struct *mmc: pointer for the mmc device strcuture
+ * bootsize: size of boot partition
+ * rpmbsize: size of rpmb partition
+ *
+ * Returns 0 on success.
+ */
+
+int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
+				unsigned long rpmbsize)
+{
+	int err;
+	struct mmc_cmd cmd;
+
+	/* Only use this command for raw EMMC moviNAND. Enter backdoor mode */
+	cmd.cmdidx = MMC_CMD_RES_MAN;
+	cmd.resp_type = MMC_RSP_R1b;
+	cmd.cmdarg = MMC_CMD62_ARG1;
+
+	err = mmc_send_cmd(mmc, &cmd, NULL);
+	if (err) {
+		debug("mmc_boot_partition_size_change: Error1 = %d\n", err);
+		return err;
+	}
+
+	/* Boot partition changing mode */
+	cmd.cmdidx = MMC_CMD_RES_MAN;
+	cmd.resp_type = MMC_RSP_R1b;
+	cmd.cmdarg = MMC_CMD62_ARG2;
+
+	err = mmc_send_cmd(mmc, &cmd, NULL);
+	if (err) {
+		debug("mmc_boot_partition_size_change: Error2 = %d\n", err);
+		return err;
+	}
+	/* boot partition size is multiple of 128KB */
+	bootsize = (bootsize * 1024) / 128;
+
+	/* Arg: boot partition size */
+	cmd.cmdidx = MMC_CMD_RES_MAN;
+	cmd.resp_type = MMC_RSP_R1b;
+	cmd.cmdarg = bootsize;
+
+	err = mmc_send_cmd(mmc, &cmd, NULL);
+	if (err) {
+		debug("mmc_boot_partition_size_change: Error3 = %d\n", err);
+		return err;
+	}
+	/* RPMB partition size is multiple of 128KB */
+	rpmbsize = (rpmbsize * 1024) / 128;
+	/* Arg: RPMB partition size */
+	cmd.cmdidx = MMC_CMD_RES_MAN;
+	cmd.resp_type = MMC_RSP_R1b;
+	cmd.cmdarg = rpmbsize;
+
+	err = mmc_send_cmd(mmc, &cmd, NULL);
+	if (err) {
+		debug("mmc_boot_partition_size_change: Error4 = %d\n", err);
+		return err;
+	}
+	return 0;
+}
+
+/*
+ * Modify EXT_CSD[177] which is BOOT_BUS_WIDTH
+ * based on the passed in values for BOOT_BUS_WIDTH, RESET_BOOT_BUS_WIDTH
+ * and BOOT_MODE.
+ *
+ * Returns 0 on success.
+ */
+int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode)
+{
+	int err;
+
+	err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_BUS_WIDTH,
+			 EXT_CSD_BOOT_BUS_WIDTH_MODE(mode) |
+			 EXT_CSD_BOOT_BUS_WIDTH_RESET(reset) |
+			 EXT_CSD_BOOT_BUS_WIDTH_WIDTH(width));
+
+	if (err)
+		return err;
+	return 0;
+}
+
+/*
+ * Modify EXT_CSD[179] which is PARTITION_CONFIG (formerly BOOT_CONFIG)
+ * based on the passed in values for BOOT_ACK, BOOT_PARTITION_ENABLE and
+ * PARTITION_ACCESS.
+ *
+ * Returns 0 on success.
+ */
+int mmc_set_part_conf(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
+{
+	int err;
+
+	err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
+			 EXT_CSD_BOOT_ACK(ack) |
+			 EXT_CSD_BOOT_PART_NUM(part_num) |
+			 EXT_CSD_PARTITION_ACCESS(access));
+
+	if (err)
+		return err;
+	return 0;
+}
+
+/*
+ * Modify EXT_CSD[162] which is RST_n_FUNCTION based on the given value
+ * for enable.  Note that this is a write-once field for non-zero values.
+ *
+ * Returns 0 on success.
+ */
+int mmc_set_rst_n_function(struct mmc *mmc, u8 enable)
+{
+	return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_RST_N_FUNCTION,
+			  enable);
+}

drivers/mmc/mmc_private.h

@@ -106,4 +106,15 @@ void mmc_list_add(struct mmc *mmc);
  */
 int mmc_switch_part(struct mmc *mmc, unsigned int part_num);
 
+/**
+ * mmc_switch() - Issue and MMC switch mode command
+ *
+ * @mmc:	MMC device
+ * @set:	Unused
+ * @index:	Cmdarg index
+ * @value:	Cmdarg value
+ * @return 0 if OK, -ve on error
+ */
+int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value);
+
 #endif /* _MMC_PRIVATE_H_ */