lkml.org 
[lkml]   [2019]   [Dec]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[RFC,PATCH 1/6] mmc: Add UHS-II support in public headers
Date
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
\
 
 \ /
  Last update: 2019-12-30 12:39    [W:0.025 / U:7.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site