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From:   Ben Chuang <benchuanggli@gmail.com>
To:     adrian.hunter@intel.com, ulf.hansson@linaro.org
Cc:     linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
        ben.chuang@genesyslogic.com.tw, greg.tu@genesyslogic.com.tw,
        Ben Chuang <benchuanggli@gmail.com>
Subject: [RFC,PATCH 1/6] mmc: Add UHS-II support in public headers
Date:   Mon, 30 Dec 2019 19:38:33 +0800
Message-Id: <20191230113833.37905-1-benchuanggli@gmail.com>
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Sender: linux-kernel-owner@vger.kernel.org
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From: Ben Chuang <ben.chuang@genesyslogic.com.tw>

Add UHS-II support in public headers

Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
---
 include/linux/mmc/card.h |  2 ++
 include/linux/mmc/core.h |  6 ++++++
 include/linux/mmc/host.h | 30 ++++++++++++++++++++++++++++++
 3 files changed, 38 insertions(+)

diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 9b6336ad3266..e12a2f533236 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -180,6 +180,8 @@ struct sd_switch_caps {
 #define SD_SET_CURRENT_LIMIT_400	1
 #define SD_SET_CURRENT_LIMIT_600	2
 #define SD_SET_CURRENT_LIMIT_800	3
+#define SD_SET_CURRENT_LIMIT_1000       4
+
 #define SD_SET_CURRENT_NO_CHANGE	(-1)
 
 #define SD_MAX_CURRENT_200	(1 << SD_SET_CURRENT_LIMIT_200)
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index b7ba8810a3b5..cd294a1c31c6 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -7,6 +7,7 @@
 
 #include <linux/completion.h>
 #include <linux/types.h>
+#include <linux/mmc/uhs2.h>
 
 struct mmc_data;
 struct mmc_request;
@@ -112,6 +113,11 @@ struct mmc_command {
 
 	struct mmc_data		*data;		/* data segment associated with cmd */
 	struct mmc_request	*mrq;		/* associated request */
+
+	struct uhs2_command	*uhs2_cmd;	/* UHS2 command */
+	u8			*uhs2_resp;	/* UHS2 native cmd resp */
+	u8			uhs2_resp_len;	/* UHS2 native cmd resp len */
+	u8			uhs2_tmode0_flag; /* UHS2 transfer mode flag */
 };
 
 struct mmc_data {
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index ba703384bea0..3d6a7c9b534f 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -15,10 +15,12 @@
 #include <linux/mmc/card.h>
 #include <linux/mmc/pm.h>
 #include <linux/dma-direction.h>
+#include <linux/mmc/uhs2.h>
 
 struct mmc_ios {
 	unsigned int	clock;			/* clock rate */
 	unsigned short	vdd;
+	unsigned short	vdd2;			/* UHS2 VDD2 power supply */
 	unsigned int	power_delay_ms;		/* waiting for stable power */
 
 /* vdd stores the bit number of the selected voltage range from below. */
@@ -60,6 +62,7 @@ struct mmc_ios {
 #define MMC_TIMING_MMC_DDR52	8
 #define MMC_TIMING_MMC_HS200	9
 #define MMC_TIMING_MMC_HS400	10
+#define MMC_TIMING_UHS2		11
 
 	unsigned char	signal_voltage;		/* signalling voltage (1.8V or 3.3V) */
 
@@ -169,6 +172,11 @@ struct mmc_host_ops {
 	 */
 	int	(*multi_io_quirk)(struct mmc_card *card,
 				  unsigned int direction, int blk_size);
+	/* UHS2 interfaces */
+	int	(*uhs2_detect_init)(struct mmc_host *host);
+	int	(*uhs2_set_reg)(struct mmc_host *host, enum uhs2_act act);
+	void    (*uhs2_disable_clk)(struct mmc_host *host);
+	void    (*uhs2_enable_clk)(struct mmc_host *host);
 };
 
 struct mmc_cqe_ops {
@@ -261,6 +269,7 @@ struct mmc_pwrseq;
 
 struct mmc_supply {
 	struct regulator *vmmc;		/* Card power supply */
+	struct regulator *vmmc2;	/* UHS2 VDD2 power supply */
 	struct regulator *vqmmc;	/* Optional Vccq supply */
 };
 
@@ -281,12 +290,14 @@ struct mmc_host {
 	u32			ocr_avail_sdio;	/* SDIO-specific OCR */
 	u32			ocr_avail_sd;	/* SD-specific OCR */
 	u32			ocr_avail_mmc;	/* MMC-specific OCR */
+	u32			ocr_avail_uhs2;	/* UHS2-specific OCR */
 #ifdef CONFIG_PM_SLEEP
 	struct notifier_block	pm_notify;
 #endif
 	u32			max_current_330;
 	u32			max_current_300;
 	u32			max_current_180;
+	u32			max_current_180_vdd2; /* UHS2 vdd2 max curt. */
 
 #define MMC_VDD_165_195		0x00000080	/* VDD voltage 1.65 - 1.95 */
 #define MMC_VDD_20_21		0x00000100	/* VDD voltage 2.0 ~ 2.1 */
@@ -305,6 +316,7 @@ struct mmc_host {
 #define MMC_VDD_33_34		0x00200000	/* VDD voltage 3.3 ~ 3.4 */
 #define MMC_VDD_34_35		0x00400000	/* VDD voltage 3.4 ~ 3.5 */
 #define MMC_VDD_35_36		0x00800000	/* VDD voltage 3.5 ~ 3.6 */
+#define MMC_VDD2_165_195	0x00000080	/* UHS2 VDD2 1.65 ~ 1.95 */
 
 	u32			caps;		/* Host capabilities */
 
@@ -336,6 +348,7 @@ struct mmc_host {
 #define MMC_CAP_DRIVER_TYPE_A	(1 << 23)	/* Host supports Driver Type A */
 #define MMC_CAP_DRIVER_TYPE_C	(1 << 24)	/* Host supports Driver Type C */
 #define MMC_CAP_DRIVER_TYPE_D	(1 << 25)	/* Host supports Driver Type D */
+#define MMC_CAP_UHS2		(1 << 26)	/* Host supports UHS2 mode */
 #define MMC_CAP_DONE_COMPLETE	(1 << 27)	/* RW reqs can be completed within mmc_request_done() */
 #define MMC_CAP_CD_WAKE		(1 << 28)	/* Enable card detect wake */
 #define MMC_CAP_CMD_DURING_TFR	(1 << 29)	/* Commands during data transfer */
@@ -374,6 +387,17 @@ struct mmc_host {
 
 	mmc_pm_flag_t		pm_caps;	/* supported pm features */
 
+	struct uhs2_host_caps	uhs2_caps;	/* UHS2 host capabilities */
+	struct uhs2_card_prop	uhs2_dev_prop;	/* UHS2 device properties */
+	u32			group_desc;	/* UHS2 property */
+	int			flags;
+#define MMC_UHS2_SUPPORT	(1 << 0)
+#define MMC_UHS2_INITIALIZED	(1 << 1)
+#define MMC_UHS2_2L_HD		(1 << 2)
+#define MMC_UHS2_APP_CMD	(1 << 3)
+#define MMC_UHS2_SPEED_B	(1 << 4)
+#define MMC_SUPPORT_ADMA3	(1 << 5)
+
 	/* host specific block data */
 	unsigned int		max_seg_size;	/* see blk_queue_max_segment_size */
 	unsigned short		max_segs;	/* see blk_queue_max_segments */
@@ -566,6 +590,12 @@ static inline int mmc_card_uhs(struct mmc_card *card)
 		card->host->ios.timing <= MMC_TIMING_UHS_DDR50;
 }
 
+static inline bool mmc_card_uhs2(struct mmc_card *card)
+{
+	return (card->host->flags & MMC_UHS2_SUPPORT) &&
+		(card->host->flags & MMC_UHS2_INITIALIZED);
+}
+
 void mmc_retune_timer_stop(struct mmc_host *host);
 
 static inline void mmc_retune_needed(struct mmc_host *host)
-- 
2.24.1