dm: mmc: rpi: Convert Raspberry Pi to driver model for MMC
Convert the bcm2835 SDHCI driver over to support CONFIG_DM_MMC and move
all boards over. There is no need to keep the old code since there are no
other users.
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/mmc/bcm2835_sdhci.c b/drivers/mmc/bcm2835_sdhci.c
index 20079bc..b6e2fc6 100644
--- a/drivers/mmc/bcm2835_sdhci.c
+++ b/drivers/mmc/bcm2835_sdhci.c
@@ -37,15 +37,24 @@
*/
#include <common.h>
+#include <dm.h>
#include <malloc.h>
+#include <memalign.h>
#include <sdhci.h>
-#include <mach/timer.h>
+#include <asm/arch/msg.h>
+#include <asm/arch/mbox.h>
#include <mach/sdhci.h>
+#include <mach/timer.h>
/* 400KHz is max freq for card ID etc. Use that as min */
#define MIN_FREQ 400000
#define SDHCI_BUFFER 0x20
+struct bcm2835_sdhci_plat {
+ struct mmc_config cfg;
+ struct mmc mmc;
+};
+
struct bcm2835_sdhci_host {
struct sdhci_host host;
uint twoticks_delay;
@@ -58,7 +67,7 @@
}
static inline void bcm2835_sdhci_raw_writel(struct sdhci_host *host, u32 val,
- int reg)
+ int reg)
{
struct bcm2835_sdhci_host *bcm_host = to_bcm(host);
@@ -153,16 +162,33 @@
.read_b = bcm2835_sdhci_readb,
};
-int bcm2835_sdhci_init(u32 regbase, u32 emmc_freq)
+static int bcm2835_sdhci_bind(struct udevice *dev)
{
- struct bcm2835_sdhci_host *bcm_host;
- struct sdhci_host *host;
+ struct bcm2835_sdhci_plat *plat = dev_get_platdata(dev);
- bcm_host = calloc(1, sizeof(*bcm_host));
- if (!bcm_host) {
- printf("sdhci_host calloc fail!\n");
- return -ENOMEM;
+ return sdhci_bind(dev, &plat->mmc, &plat->cfg);
+}
+
+static int bcm2835_sdhci_probe(struct udevice *dev)
+{
+ struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+ struct bcm2835_sdhci_plat *plat = dev_get_platdata(dev);
+ struct bcm2835_sdhci_host *priv = dev_get_priv(dev);
+ struct sdhci_host *host = &priv->host;
+ fdt_addr_t base;
+ int emmc_freq;
+ int ret;
+
+ base = dev_get_addr(dev);
+ if (base == FDT_ADDR_T_NONE)
+ return -EINVAL;
+
+ ret = bcm2835_get_mmc_clock();
+ if (ret < 0) {
+ debug("%s: Failed to set MMC clock (err=%d)\n", __func__, ret);
+ return ret;
}
+ emmc_freq = ret;
/*
* See the comments in bcm2835_sdhci_raw_writel().
@@ -177,19 +203,42 @@
* Multiply by 1000000 to get uS per two ticks.
* +1 for hack rounding.
*/
- bcm_host->twoticks_delay = ((2 * 1000000) / MIN_FREQ) + 1;
- bcm_host->last_write = 0;
+ priv->twoticks_delay = ((2 * 1000000) / MIN_FREQ) + 1;
+ priv->last_write = 0;
- host = &bcm_host->host;
- host->name = "bcm2835_sdhci";
- host->ioaddr = (void *)(unsigned long)regbase;
+ host->name = dev->name;
+ host->ioaddr = (void *)base;
host->quirks = SDHCI_QUIRK_BROKEN_VOLTAGE | SDHCI_QUIRK_BROKEN_R1B |
SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_NO_HISPD_BIT;
host->max_clk = emmc_freq;
host->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
host->ops = &bcm2835_ops;
+ ret = sdhci_setup_cfg(&plat->cfg, host, emmc_freq, MIN_FREQ);
+ if (ret) {
+ debug("%s: Failed to setup SDHCI (err=%d)\n", __func__, ret);
+ return ret;
+ }
+
- add_sdhci(host, 0, MIN_FREQ);
+ upriv->mmc = &plat->mmc;
+ host->mmc = &plat->mmc;
+ host->mmc->priv = host;
- return 0;
+ return sdhci_probe(dev);
}
+
+static const struct udevice_id bcm2835_sdhci_match[] = {
+ { .compatible = "brcm,bcm2835-sdhci" },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(sdhci_cdns) = {
+ .name = "sdhci-bcm2835",
+ .id = UCLASS_MMC,
+ .of_match = bcm2835_sdhci_match,
+ .bind = bcm2835_sdhci_bind,
+ .probe = bcm2835_sdhci_probe,
+ .priv_auto_alloc_size = sizeof(struct bcm2835_sdhci_host),
+ .platdata_auto_alloc_size = sizeof(struct bcm2835_sdhci_plat),
+ .ops = &sdhci_ops,
+};