d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

mmccam: Add support for 1.8V sdcard

Browse Source 
If the card reports that it support 1.8V signaling switch to this voltage.
While here update the list of mode for mmccam.

Submitted by:	kibab
This commit is contained in:
Emmanuel Vadot 2020-07-22 19:04:45 +00:00
parent 9bca466745
commit 2657d8e33e
2 changed files with 49 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
sys/cam/cam_ccb.h
View File

@ -1046,14 +1046,41 @@ struct ccb_trans_settings_mmc {
#define MMC_PM (1 << 5)
#define MMC_BT (1 << 6)
#define MMC_BM (1 << 7)
#define MMC_VCCQ (1 << 8)
uint32_t ios_valid;
/* The folowing is used only for GET_TRAN_SETTINGS */
uint32_t host_ocr;
int host_f_min;
int host_f_max;
#define MMC_CAP_4_BIT_DATA (1 << 0) /* Can do 4-bit data transfers */
#define MMC_CAP_8_BIT_DATA (1 << 1) /* Can do 8-bit data transfers */
#define MMC_CAP_HSPEED (1 << 2) /* Can do High Speed transfers */
/* Copied from sys/dev/mmc/bridge.h */
#define MMC_CAP_4_BIT_DATA (1 << 0) /* Can do 4-bit data transfers */
#define MMC_CAP_8_BIT_DATA (1 << 1) /* Can do 8-bit data transfers */
#define MMC_CAP_HSPEED (1 << 2) /* Can do High Speed transfers */
#define MMC_CAP_BOOT_NOACC (1 << 4) /* Cannot access boot partitions */
#define MMC_CAP_WAIT_WHILE_BUSY (1 << 5) /* Host waits for busy responses */
#define MMC_CAP_UHS_SDR12 (1 << 6) /* Can do UHS SDR12 */
#define MMC_CAP_UHS_SDR25 (1 << 7) /* Can do UHS SDR25 */
#define MMC_CAP_UHS_SDR50 (1 << 8) /* Can do UHS SDR50 */
#define MMC_CAP_UHS_SDR104 (1 << 9) /* Can do UHS SDR104 */
#define MMC_CAP_UHS_DDR50 (1 << 10) /* Can do UHS DDR50 */
#define MMC_CAP_MMC_DDR52_120 (1 << 11) /* Can do eMMC DDR52 at 1.2 V */
#define MMC_CAP_MMC_DDR52_180 (1 << 12) /* Can do eMMC DDR52 at 1.8 V */
#define MMC_CAP_MMC_DDR52 (MMC_CAP_MMC_DDR52_120 | MMC_CAP_MMC_DDR52_180)
#define MMC_CAP_MMC_HS200_120 (1 << 13) /* Can do eMMC HS200 at 1.2 V */
#define MMC_CAP_MMC_HS200_180 (1 << 14) /* Can do eMMC HS200 at 1.8 V */
#define MMC_CAP_MMC_HS200 (MMC_CAP_MMC_HS200_120| MMC_CAP_MMC_HS200_180)
#define MMC_CAP_MMC_HS400_120 (1 << 15) /* Can do eMMC HS400 at 1.2 V */
#define MMC_CAP_MMC_HS400_180 (1 << 16) /* Can do eMMC HS400 at 1.8 V */
#define MMC_CAP_MMC_HS400 (MMC_CAP_MMC_HS400_120 | MMC_CAP_MMC_HS400_180)
#define MMC_CAP_MMC_HSX00_120 (MMC_CAP_MMC_HS200_120 | MMC_CAP_MMC_HS400_120)
#define MMC_CAP_MMC_ENH_STROBE (1 << 17) /* Can do eMMC Enhanced Strobe */
#define MMC_CAP_SIGNALING_120 (1 << 18) /* Can do signaling at 1.2 V */
#define MMC_CAP_SIGNALING_180 (1 << 19) /* Can do signaling at 1.8 V */
#define MMC_CAP_SIGNALING_330 (1 << 20) /* Can do signaling at 3.3 V */
#define MMC_CAP_DRIVER_TYPE_A (1 << 21) /* Can do Driver Type A */
#define MMC_CAP_DRIVER_TYPE_C (1 << 22) /* Can do Driver Type C */
#define MMC_CAP_DRIVER_TYPE_D (1 << 23) /* Can do Driver Type D */
uint32_t host_caps;
uint32_t host_max_data;
};

19
sys/cam/mmc/mmc_xpt.c
View File

@ -167,6 +167,7 @@ typedef struct {
union ccb saved_ccb;
uint32_t flags;
#define PROBE_FLAG_ACMD_SENT 0x1 /* CMD55 is sent, card expects ACMD */
#define PROBE_FLAG_HOST_CAN_DO_18V 0x2 /* Host can do 1.8V signaling */
uint8_t acmd41_count; /* how many times ACMD41 has been issued */
struct cam_periph *periph;
} mmcprobe_softc;
@ -457,6 +458,9 @@ mmc_print_ident(struct mmc_params *ident_data)
sbuf_printf(sb, "%sSDIO", space ? " " : "");
space = true;
}
if (ident_data->card_features & CARD_FEATURE_18V) {
sbuf_printf(sb, "%s1.8-Signaling", space ? " " : "");
}
sbuf_printf(sb, ">\n");
if (ident_data->card_features & CARD_FEATURE_MEMORY)
@ -636,6 +640,9 @@ mmcprobe_start(struct cam_periph *periph, union ccb *start_ccb)
init_standard_ccb(start_ccb, XPT_GET_TRAN_SETTINGS);
xpt_action(start_ccb);
uint32_t host_caps = cts->host_caps;
if (host_caps & MMC_CAP_SIGNALING_180)
softc->flags |= PROBE_FLAG_HOST_CAN_DO_18V;
uint32_t hv = mmc_highest_voltage(cts->host_ocr);
init_standard_ccb(start_ccb, XPT_SET_TRAN_SETTINGS);
cts->ios.vdd = hv;
@ -1008,6 +1015,18 @@ mmcprobe_done(struct cam_periph *periph, union ccb *done_ccb)
CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
("Card supports 1.8V signaling\n"));
mmcp->card_features |= CARD_FEATURE_18V;
if (softc->flags & PROBE_FLAG_HOST_CAN_DO_18V) {
CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
("Host supports 1.8V signaling. Switch voltage!\n"));
done_ccb->ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
done_ccb->ccb_h.flags = CAM_DIR_NONE;
done_ccb->ccb_h.retry_count = 0;
done_ccb->ccb_h.timeout = 100;
done_ccb->ccb_h.cbfcnp = NULL;
done_ccb->cts.proto_specific.mmc.ios.vccq = vccq_180;
done_ccb->cts.proto_specific.mmc.ios_valid = MMC_VCCQ;
xpt_action(done_ccb);
}
}
} else {
CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,