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sdhci: implement the Host Control 2 register (tuning sequence)

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[based on a patch from Alistair Francis <alistair.francis@xilinx.com>
 from qemu/xilinx tag xilinx-v2015.2]
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Message-Id: <20180208164818.7961-20-f4bug@amsat.org>
This commit is contained in:
Philippe Mathieu-Daudé 2018-02-08 13:48:07 -03:00 committed by Paolo Bonzini
parent 06c5120b09
commit ea55a221bf
3 changed files with 30 additions and 3 deletions
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10
hw/sd/sdhci-internal.h
View File

@ -188,6 +188,16 @@ FIELD(SDHC_ACMD12ERRSTS, TIMEOUT_ERR, 1, 1);
FIELD(SDHC_ACMD12ERRSTS, CRC_ERR, 2, 1);
FIELD(SDHC_ACMD12ERRSTS, INDEX_ERR, 4, 1);
/* Host Control Register 2 (since v3) */
#define SDHC_HOSTCTL2 0x3E
FIELD(SDHC_HOSTCTL2, UHS_MODE_SEL, 0, 3);
FIELD(SDHC_HOSTCTL2, V18_ENA, 3, 1); /* UHS-I only */
FIELD(SDHC_HOSTCTL2, DRIVER_STRENGTH, 4, 2); /* UHS-I only */
FIELD(SDHC_HOSTCTL2, EXECUTE_TUNING, 6, 1); /* UHS-I only */
FIELD(SDHC_HOSTCTL2, SAMPLING_CLKSEL, 7, 1); /* UHS-I only */
FIELD(SDHC_HOSTCTL2, ASYNC_INT, 14, 1);
FIELD(SDHC_HOSTCTL2, PRESET_ENA, 15, 1);
/* HWInit Capabilities Register 0x05E80080 */
#define SDHC_CAPAB 0x40
FIELD(SDHC_CAPAB, TOCLKFREQ, 0, 6);

22
hw/sd/sdhci.c
View File

@ -408,14 +408,29 @@ static void sdhci_end_transfer(SDHCIState *s)
static void sdhci_read_block_from_card(SDHCIState *s)
{
int index = 0;
uint8_t data;
const uint16_t blk_size = s->blksize & BLOCK_SIZE_MASK;
if ((s->trnmod & SDHC_TRNS_MULTI) &&
(s->trnmod & SDHC_TRNS_BLK_CNT_EN) && (s->blkcnt == 0)) {
return;
}
for (index = 0; index < (s->blksize & BLOCK_SIZE_MASK); index++) {
s->fifo_buffer[index] = sdbus_read_data(&s->sdbus);
for (index = 0; index < blk_size; index++) {
data = sdbus_read_data(&s->sdbus);
if (!FIELD_EX32(s->hostctl2, SDHC_HOSTCTL2, EXECUTE_TUNING)) {
/* Device is not in tunning */
s->fifo_buffer[index] = data;
}
}
if (FIELD_EX32(s->hostctl2, SDHC_HOSTCTL2, EXECUTE_TUNING)) {
/* Device is in tunning */
s->hostctl2 &= ~R_SDHC_HOSTCTL2_EXECUTE_TUNING_MASK;
s->hostctl2 |= R_SDHC_HOSTCTL2_SAMPLING_CLKSEL_MASK;
s->prnsts &= ~(SDHC_DAT_LINE_ACTIVE | SDHC_DOING_READ |
SDHC_DATA_INHIBIT);
goto read_done;
}
/* New data now available for READ through Buffer Port Register */
@ -440,6 +455,7 @@ static void sdhci_read_block_from_card(SDHCIState *s)
}
}
read_done:
sdhci_update_irq(s);
}
@ -1005,7 +1021,7 @@ static uint64_t sdhci_read(void *opaque, hwaddr offset, unsigned size)
ret = s->norintsigen | (s->errintsigen << 16);
break;
case SDHC_ACMD12ERRSTS:
ret = s->acmd12errsts;
ret = s->acmd12errsts | (s->hostctl2 << 16);
break;
case SDHC_CAPAB:
ret = (uint32_t)s->capareg;

1
include/hw/sd/sdhci.h
View File

@ -73,6 +73,7 @@ typedef struct SDHCIState {
uint16_t norintsigen; /* Normal Interrupt Signal Enable Register */
uint16_t errintsigen; /* Error Interrupt Signal Enable Register */
uint16_t acmd12errsts; /* Auto CMD12 error status register */
uint16_t hostctl2; /* Host Control 2 */
uint64_t admasysaddr; /* ADMA System Address Register */
/* Read-only registers */