mmc: make UHS and HS200 optional

Supporting USH and HS200 increases the code size as it brings in IO voltage
control, tuning and fatter data structures.
Use Kconfig configuration to select which of those features should be
built in.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>

drivers/mmc/Kconfig

@@ -51,6 +51,52 @@ config MMC_QUIRKS
 	  are enabled by default, other may require additionnal flags or are
 	  enabled by the host driver.
 
+config MMC_IO_VOLTAGE
+	bool "Support IO voltage configuration"
+	help
+	  IO voltage configuration allows selecting the voltage level of the IO
+	  lines (not the level of main supply). This is required for UHS
+	  support. For eMMC this not mandatory, but not enabling this option may
+	  prevent the driver of using the faster modes.
+
+config SPL_MMC_IO_VOLTAGE
+	bool "Support IO voltage configuration in SPL"
+	default n
+	help
+	  IO voltage configuration allows selecting the voltage level of the IO
+	  lines (not the level of main supply). This is required for UHS
+	  support. For eMMC this not mandatory, but not enabling this option may
+	  prevent the driver of using the faster modes.
+
+config MMC_UHS_SUPPORT
+	bool "enable UHS support"
+	depends on MMC_IO_VOLTAGE
+	help
+	  The Ultra High Speed (UHS) bus is available on some SDHC and SDXC
+	  cards. The IO voltage must be switchable from 3.3v to 1.8v. The bus
+	  frequency can go up to 208MHz (SDR104)
+
+config SPL_MMC_UHS_SUPPORT
+	bool "enable UHS support in SPL"
+	depends on SPL_MMC_IO_VOLTAGE
+	help
+	  The Ultra High Speed (UHS) bus is available on some SDHC and SDXC
+	  cards. The IO voltage must be switchable from 3.3v to 1.8v. The bus
+	  frequency can go up to 208MHz (SDR104)
+
+config MMC_HS200_SUPPORT
+	bool "enable HS200 support"
+	help
+	  The HS200 mode is support by some eMMC. The bus frequency is up to
+	  200MHz. This mode requires tuning the IO.
+
+
+config SPL_MMC_HS200_SUPPORT
+	bool "enable HS200 support in SPL"
+	help
+	  The HS200 mode is support by some eMMC. The bus frequency is up to
+	  200MHz. This mode requires tuning the IO.
+
 config MMC_VERBOSE
 	bool "Output more information about the MMC"
 	default y

drivers/mmc/mmc-uclass.c

@@ -63,6 +63,7 @@ void mmc_send_init_stream(struct mmc *mmc)
 	dm_mmc_send_init_stream(mmc->dev);
 }
 
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
 int dm_mmc_wait_dat0(struct udevice *dev, int state, int timeout)
 {
 	struct dm_mmc_ops *ops = mmc_get_ops(dev);
@@ -76,6 +77,7 @@ int mmc_wait_dat0(struct mmc *mmc, int state, int timeout)
 {
 	return dm_mmc_wait_dat0(mmc->dev, state, timeout);
 }
+#endif
 
 int dm_mmc_get_wp(struct udevice *dev)
 {
@@ -105,6 +107,7 @@ int mmc_getcd(struct mmc *mmc)
 	return dm_mmc_get_cd(mmc->dev);
 }
 
+#ifdef MMC_SUPPORTS_TUNING
 int dm_mmc_execute_tuning(struct udevice *dev, uint opcode)
 {
 	struct dm_mmc_ops *ops = mmc_get_ops(dev);
@@ -118,6 +121,7 @@ int mmc_execute_tuning(struct mmc *mmc, uint opcode)
 {
 	return dm_mmc_execute_tuning(mmc->dev, opcode);
 }
+#endif
 
 int mmc_of_parse(struct udevice *dev, struct mmc_config *cfg)
 {

drivers/mmc/mmc.c

@@ -59,10 +59,12 @@ struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
 
 #if !CONFIG_IS_ENABLED(DM_MMC)
 
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
 static int mmc_wait_dat0(struct mmc *mmc, int state, int timeout)
 {
 	return -ENOSYS;
 }
+#endif
 
 __weak int board_mmc_getwp(struct mmc *mmc)
 {
@@ -190,14 +192,20 @@ static uint mmc_mode2freq(struct mmc *mmc, enum bus_mode mode)
 	      [SD_LEGACY]	= 25000000,
 	      [MMC_HS]		= 26000000,
 	      [SD_HS]		= 50000000,
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
 	      [UHS_SDR12]	= 25000000,
 	      [UHS_SDR25]	= 50000000,
 	      [UHS_SDR50]	= 100000000,
-	      [UHS_SDR104]	= 208000000,
 	      [UHS_DDR50]	= 50000000,
+#ifdef MMC_SUPPORTS_TUNING
+	      [UHS_SDR104]	= 208000000,
+#endif
+#endif
 	      [MMC_HS_52]	= 52000000,
 	      [MMC_DDR_52]	= 52000000,
+#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
 	      [MMC_HS_200]	= 200000000,
+#endif
 	};
 
 	if (mode == MMC_LEGACY)
@@ -308,6 +316,7 @@ int mmc_set_blocklen(struct mmc *mmc, int len)
 	return err;
 }
 
+#ifdef MMC_SUPPORTS_TUNING
 static const u8 tuning_blk_pattern_4bit[] = {
 	0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc,
 	0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef,
@@ -375,6 +384,7 @@ int mmc_send_tuning(struct mmc *mmc, u32 opcode, int *cmd_error)
 
 	return 0;
 }
+#endif
 
 static int mmc_read_blocks(struct mmc *mmc, void *dst, lbaint_t start,
 			   lbaint_t blkcnt)
@@ -495,6 +505,7 @@ static int mmc_go_idle(struct mmc *mmc)
 	return 0;
 }
 
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
 static int mmc_switch_voltage(struct mmc *mmc, int signal_voltage)
 {
 	struct mmc_cmd cmd;
@@ -554,6 +565,7 @@ static int mmc_switch_voltage(struct mmc *mmc, int signal_voltage)
 
 	return 0;
 }
+#endif
 
 static int sd_send_op_cond(struct mmc *mmc, bool uhs_en)
 {
@@ -620,12 +632,14 @@ static int sd_send_op_cond(struct mmc *mmc, bool uhs_en)
 
 	mmc->ocr = cmd.response[0];
 
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
 	if (uhs_en && !(mmc_host_is_spi(mmc)) && (cmd.response[0] & 0x41000000)
 	    == 0x41000000) {
 		err = mmc_switch_voltage(mmc, MMC_SIGNAL_VOLTAGE_180);
 		if (err)
 			return err;
 	}
+#endif
 
 	mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
 	mmc->rca = 0;
@@ -880,6 +894,7 @@ static int mmc_set_capacity(struct mmc *mmc, int part_num)
 	return 0;
 }
 
+#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
 static int mmc_boot_part_access_chk(struct mmc *mmc, unsigned int part_num)
 {
 	int forbidden = 0;
@@ -903,6 +918,13 @@ static int mmc_boot_part_access_chk(struct mmc *mmc, unsigned int part_num)
 
 	return 0;
 }
+#else
+static inline int mmc_boot_part_access_chk(struct mmc *mmc,
+					   unsigned int part_num)
+{
+	return 0;
+}
+#endif
 
 int mmc_switch_part(struct mmc *mmc, unsigned int part_num)
 {
@@ -1169,7 +1191,9 @@ static int sd_get_capabilities(struct mmc *mmc)
 	ALLOC_CACHE_ALIGN_BUFFER(__be32, switch_status, 16);
 	struct mmc_data data;
 	int timeout;
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
 	u32 sd3_bus_mode;
+#endif
 
 	mmc->card_caps = MMC_MODE_1BIT | MMC_CAP(SD_LEGACY);
 
@@ -1251,6 +1275,7 @@ retry_scr:
 	if (__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED)
 		mmc->card_caps |= MMC_CAP(SD_HS);
 
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
 	/* Version before 3.0 don't support UHS modes */
 	if (mmc->version < SD_VERSION_3)
 		return 0;
@@ -1266,6 +1291,7 @@ retry_scr:
 		mmc->card_caps |= MMC_CAP(UHS_SDR12);
 	if (sd3_bus_mode & SD_MODE_UHS_DDR50)
 		mmc->card_caps |= MMC_CAP(UHS_DDR50);
+#endif
 
 	return 0;
 }
@@ -1438,10 +1464,12 @@ static inline int bus_width(uint cap)
 }
 
 #if !CONFIG_IS_ENABLED(DM_MMC)
+#ifdef MMC_SUPPORTS_TUNING
 static int mmc_execute_tuning(struct mmc *mmc, uint opcode)
 {
 	return -ENOTSUPP;
 }
+#endif
 
 static void mmc_send_init_stream(struct mmc *mmc)
 {
@@ -1507,9 +1535,12 @@ void mmc_dump_capabilities(const char *text, uint caps)
 struct mode_width_tuning {
 	enum bus_mode mode;
 	uint widths;
+#ifdef MMC_SUPPORTS_TUNING
 	uint tuning;
+#endif
 };
 
+#if CONFIG_IS_ENABLED(MMC_IO_VOLTAGE)
 int mmc_voltage_to_mv(enum mmc_voltage voltage)
 {
 	switch (voltage) {
@@ -1535,13 +1566,22 @@ static int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage)
 
 	return err;
 }
+#else
+static inline int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage)
+{
+	return 0;
+}
+#endif
 
 static const struct mode_width_tuning sd_modes_by_pref[] = {
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
+#ifdef MMC_SUPPORTS_TUNING
 	{
 		.mode = UHS_SDR104,
 		.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
 		.tuning = MMC_CMD_SEND_TUNING_BLOCK
 	},
+#endif
 	{
 		.mode = UHS_SDR50,
 		.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
@@ -1554,14 +1594,17 @@ static const struct mode_width_tuning sd_modes_by_pref[] = {
 		.mode = UHS_SDR25,
 		.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
 	},
+#endif
 	{
 		.mode = SD_HS,
 		.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
 	},
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
 	{
 		.mode = UHS_SDR12,
 		.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
 	},
+#endif
 	{
 		.mode = SD_LEGACY,
 		.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
@@ -1579,7 +1622,11 @@ static int sd_select_mode_and_width(struct mmc *mmc, uint card_caps)
 	int err;
 	uint widths[] = {MMC_MODE_4BIT, MMC_MODE_1BIT};
 	const struct mode_width_tuning *mwt;
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
 	bool uhs_en = (mmc->ocr & OCR_S18R) ? true : false;
+#else
+	bool uhs_en = false;
+#endif
 	uint caps;
 
 #ifdef DEBUG
@@ -1618,6 +1665,7 @@ static int sd_select_mode_and_width(struct mmc *mmc, uint card_caps)
 				mmc_select_mode(mmc, mwt->mode);
 				mmc_set_clock(mmc, mmc->tran_speed, false);
 
+#ifdef MMC_SUPPORTS_TUNING
 				/* execute tuning if needed */
 				if (mwt->tuning && !mmc_host_is_spi(mmc)) {
 					err = mmc_execute_tuning(mmc,
@@ -1627,6 +1675,7 @@ static int sd_select_mode_and_width(struct mmc *mmc, uint card_caps)
 						goto error;
 					}
 				}
+#endif
 
 				err = sd_read_ssr(mmc);
 				if (!err)
@@ -1680,6 +1729,7 @@ static int mmc_read_and_compare_ext_csd(struct mmc *mmc)
 	return -EBADMSG;
 }
 
+#if CONFIG_IS_ENABLED(MMC_IO_VOLTAGE)
 static int mmc_set_lowest_voltage(struct mmc *mmc, enum bus_mode mode,
 				  uint32_t allowed_mask)
 {
@@ -1716,13 +1766,22 @@ static int mmc_set_lowest_voltage(struct mmc *mmc, enum bus_mode mode,
 
 	return -ENOTSUPP;
 }
+#else
+static inline int mmc_set_lowest_voltage(struct mmc *mmc, enum bus_mode mode,
+					 uint32_t allowed_mask)
+{
+	return 0;
+}
+#endif
 
 static const struct mode_width_tuning mmc_modes_by_pref[] = {
+#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
 	{
 		.mode = MMC_HS_200,
 		.widths = MMC_MODE_8BIT | MMC_MODE_4BIT,
 		.tuning = MMC_CMD_SEND_TUNING_BLOCK_HS200
 	},
+#endif
 	{
 		.mode = MMC_DDR_52,
 		.widths = MMC_MODE_8BIT | MMC_MODE_4BIT,
@@ -1832,6 +1891,7 @@ static int mmc_select_mode_and_width(struct mmc *mmc, uint card_caps)
 			/* configure the bus mode (host) */
 			mmc_select_mode(mmc, mwt->mode);
 			mmc_set_clock(mmc, mmc->tran_speed, false);
+#ifdef MMC_SUPPORTS_TUNING
 
 			/* execute tuning if needed */
 			if (mwt->tuning) {
@@ -1841,6 +1901,7 @@ static int mmc_select_mode_and_width(struct mmc *mmc, uint card_caps)
 					goto error;
 				}
 			}
+#endif
 
 			/* do a transfer to check the configuration */
 			err = mmc_read_and_compare_ext_csd(mmc);

include/mmc.h

@@ -15,6 +15,13 @@
 #include <linux/compiler.h>
 #include <part.h>
 
+#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
+#define MMC_SUPPORTS_TUNING
+#endif
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
+#define MMC_SUPPORTS_TUNING
+#endif
+
 /* SD/MMC version bits; 8 flags, 8 major, 8 minor, 8 change */
 #define SD_VERSION_SD	(1U << 31)
 #define MMC_VERSION_MMC	(1U << 30)
@@ -425,6 +432,7 @@ struct dm_mmc_ops {
 	 */
 	int (*get_wp)(struct udevice *dev);
 
+#ifdef MMC_SUPPORTS_TUNING
 	/**
 	 * execute_tuning() - Start the tuning process
 	 *
@@ -433,7 +441,9 @@ struct dm_mmc_ops {
 	 * @return 0 if OK, -ve on error
 	 */
 	int (*execute_tuning)(struct udevice *dev, uint opcode);
+#endif
 
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
 	/**
 	 * wait_dat0() - wait until dat0 is in the target state
 	 *		(CLK must be running during the wait)
@@ -444,6 +454,7 @@ struct dm_mmc_ops {
 	 * @return 0 if dat0 is in the target state, -ve on error
 	 */
 	int (*wait_dat0)(struct udevice *dev, int state, int timeout);
+#endif
 };
 
 #define mmc_get_ops(dev)        ((struct dm_mmc_ops *)(dev)->driver->ops)
@@ -500,13 +511,13 @@ enum bus_mode {
 	SD_LEGACY,
 	MMC_HS,
 	SD_HS,
+	MMC_HS_52,
+	MMC_DDR_52,
 	UHS_SDR12,
 	UHS_SDR25,
 	UHS_SDR50,
-	UHS_SDR104,
 	UHS_DDR50,
-	MMC_HS_52,
+	UHS_SDR104,
-	MMC_DDR_52,
 	MMC_HS_200,
 	MMC_MODES_END
 };
@@ -516,8 +527,12 @@ void mmc_dump_capabilities(const char *text, uint caps);
 
 static inline bool mmc_is_mode_ddr(enum bus_mode mode)
 {
-	if ((mode == MMC_DDR_52) || (mode == UHS_DDR50))
+	if (mode == MMC_DDR_52)
+		return true;
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
+	else if (mode == UHS_DDR50)
 		return true;
+#endif
 	else
 		return false;
 }
@@ -528,7 +543,11 @@ static inline bool mmc_is_mode_ddr(enum bus_mode mode)
 
 static inline bool supports_uhs(uint caps)
 {
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
 	return (caps & UHS_CAPS) ? true : false;
+#else
+	return false;
+#endif
 }
 
 /*