From 9df731a176aab8e03b984b681b1bea01ccff6644 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 06 Nov 2023 07:23:06 +0000
Subject: [PATCH] rk3568 rt uboot init
---
u-boot/drivers/mmc/sdhci.c | 53 +++++++++++++++++++++++++++++++++++++----------------
1 files changed, 37 insertions(+), 16 deletions(-)
diff --git a/u-boot/drivers/mmc/sdhci.c b/u-boot/drivers/mmc/sdhci.c
index 8c2a9a6..a02baa5 100644
--- a/u-boot/drivers/mmc/sdhci.c
+++ b/u-boot/drivers/mmc/sdhci.c
@@ -178,6 +178,7 @@
} else {
puts("timeout.\n");
/* remove timeout return error and try to send command */
+ break;
}
}
time++;
@@ -313,6 +314,29 @@
return -ECOMM;
}
+void sdhci_enable_clk(struct sdhci_host *host, u16 clk)
+{
+ unsigned int timeout;
+
+ clk |= SDHCI_CLOCK_INT_EN;
+ sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+
+ /* Wait max 20 ms */
+ timeout = 20;
+ while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
+ & SDHCI_CLOCK_INT_STABLE)) {
+ if (timeout == 0) {
+ printf("%s: Internal clock never stabilised.\n",
+ __func__);
+ return;
+ }
+ timeout--;
+ udelay(1000);
+ }
+ clk |= SDHCI_CLOCK_CARD_EN;
+ sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+}
+
int sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
{
unsigned int div, clk = 0, timeout;
@@ -379,23 +403,8 @@
clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
<< SDHCI_DIVIDER_HI_SHIFT;
- clk |= SDHCI_CLOCK_INT_EN;
- sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
- /* Wait max 20 ms */
- timeout = 20;
- while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
- & SDHCI_CLOCK_INT_STABLE)) {
- if (timeout == 0) {
- printf("%s: Internal clock never stabilised.\n",
- __func__);
- return -EBUSY;
- }
- timeout--;
- udelay(1000);
- }
- clk |= SDHCI_CLOCK_CARD_EN;
- sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+ sdhci_enable_clk(host, clk);
host->clock = clock;
return 0;
@@ -681,11 +690,23 @@
return sdhci_init(mmc);
}
+static int sdhci_set_enhanced_strobe(struct udevice *dev)
+{
+ struct mmc *mmc = mmc_get_mmc_dev(dev);
+ struct sdhci_host *host = mmc->priv;
+
+ if (host->ops && host->ops->set_enhanced_strobe)
+ return host->ops->set_enhanced_strobe(host);
+
+ return -ENOTSUPP;
+}
+
const struct dm_mmc_ops sdhci_ops = {
.card_busy = sdhci_card_busy,
.send_cmd = sdhci_send_command,
.set_ios = sdhci_set_ios,
.execute_tuning = sdhci_execute_tuning,
+ .set_enhanced_strobe = sdhci_set_enhanced_strobe,
};
#else
static const struct mmc_ops sdhci_ops = {
--
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