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sdmmc_host: read card SCR register to fill cardinfo struct

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Change-Id: I2ef8f823d93001f15ea4e794a50f7fc115a55ce6
This commit is contained in:
Aidan MacDonald 2026-08-17 11:32:10 +01:00 • committed by Solomon Peachy
parent afe5e7191d
commit bafcb38ec9
1 changed files with 31 additions and 0 deletions
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31
firmware/drivers/sdmmc_host.c
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@ -466,6 +466,30 @@ static int sdmmc_host_cmd_send_csd(struct sdmmc_host *host)
return rc;
}
static int sdmmc_host_cmd_send_scr(struct sdmmc_host *host)
{
struct sdmmc_host_command cmd = {
.command = SD_SEND_SCR,
.buffer = sdmmc_host_get_dc_buffer(host),
.flags = SDMMC_RESP_SHORT | SDMMC_DATA_READ,
.nr_blocks = 1,
.block_len = 8,
};
int rc = sdmmc_host_submit_app_cmd(host, &cmd, NULL);
if (rc)
return rc;
/*
* Card sends the most significant byte first so
* convert the data to native endian.
*/
host->cardinfo.scr[0] = load_be32_aligned(cmd.buffer + 4);
host->cardinfo.scr[1] = load_be32_aligned(cmd.buffer + 0);
return rc;
}
static int sdmmc_host_cmd_select_card(struct sdmmc_host *host)
{
struct sdmmc_host_command cmd = {
@ -664,6 +688,13 @@ static int sdmmc_host_device_init(struct sdmmc_host *host)
sdmmc_host_set_controller_bus_clock(host, SDMMC_BUS_CLOCK_25MHZ);
}
rc = sdmmc_host_cmd_send_scr(host);
if (rc)
{
logf("sdmmc_host_cmd_send_scr: %d", rc);
return rc;
}
host->initialized = true;
host->cardinfo.initialized = true;
return 0;