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Add support for the GPIO SD Card VCC regulator/switch and the GPIO SD Card

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detection pins to the Marvell Xenon SDHCI controller.

These features are enable by 'vqmmc-supply' and 'cd-gpios' properties in the
DTS.

This fixes the SD Card detection on espressobin.

Sponsored by:	Rubicon Communications, LLC (Netgate)
This commit is contained in:
Luiz Otavio O Souza 2019-06-10 21:50:07 +00:00
parent 5a0879da80
commit 1251a82da6
1 changed files with 83 additions and 0 deletions
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83
sys/dev/sdhci/sdhci_xenon.c
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@ -47,6 +47,7 @@ __FBSDID("$FreeBSD$");
#include <machine/bus.h>
#include <machine/resource.h>
#include <dev/extres/regulator/regulator.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
@ -56,6 +57,7 @@ __FBSDID("$FreeBSD$");
#include <dev/mmc/mmcreg.h>
#include <dev/sdhci/sdhci.h>
#include <dev/sdhci/sdhci_fdt_gpio.h>
#include <dev/sdhci/sdhci_xenon.h>
#include "mmcbr_if.h"
@ -84,10 +86,12 @@ struct sdhci_xenon_softc {
uint32_t max_clk; /* Max possible freq */
struct resource *irq_res; /* IRQ resource */
void *intrhand; /* Interrupt handle */
struct sdhci_fdt_gpio *gpio; /* GPIO pins for CD detection. */
struct sdhci_slot *slot; /* SDHCI internal data */
struct resource *mem_res; /* Memory resource */
regulator_t reg_vqmmc; /* vqmmc-supply regulator */
uint8_t znr; /* PHY ZNR */
uint8_t zpr; /* PHY ZPR */
bool no_18v; /* No 1.8V support */
@ -188,6 +192,14 @@ sdhci_xenon_get_ro(device_t bus, device_t dev)
return (sdhci_generic_get_ro(bus, dev) ^ sc->wp_inverted);
}
static bool
sdhci_xenon_get_card_present(device_t dev, struct sdhci_slot *slot)
{
struct sdhci_xenon_softc *sc = device_get_softc(dev);
return (sdhci_fdt_gpio_get_present(sc->gpio));
}
static int
sdhci_xenon_phy_init(device_t brdev, struct mmc_ios *ios)
{
@ -337,6 +349,25 @@ sdhci_xenon_update_ios(device_t brdev, device_t reqdev)
slot = device_get_ivars(reqdev);
ios = &slot->host.ios;
switch (ios->power_mode) {
case power_on:
break;
case power_off:
if (bootverbose)
device_printf(sc->dev, "Powering down sd/mmc\n");
if (sc->reg_vqmmc)
regulator_disable(sc->reg_vqmmc);
break;
case power_up:
if (bootverbose)
device_printf(sc->dev, "Powering up sd/mmc\n");
if (sc->reg_vqmmc)
regulator_enable(sc->reg_vqmmc);
break;
};
/* Update the PHY settings. */
if (ios->clock != 0)
sdhci_xenon_phy_set(brdev, ios);
@ -351,6 +382,42 @@ sdhci_xenon_update_ios(device_t brdev, device_t reqdev)
return (0);
}
static int
sdhci_xenon_switch_vccq(device_t brdev, device_t reqdev)
{
struct sdhci_xenon_softc *sc;
struct sdhci_slot *slot;
int uvolt, err;
sc = device_get_softc(brdev);
if (sc->reg_vqmmc == NULL)
return EOPNOTSUPP;
slot = device_get_ivars(reqdev);
switch (slot->host.ios.vccq) {
case vccq_180:
uvolt = 1800000;
break;
case vccq_330:
uvolt = 3300000;
break;
default:
return EINVAL;
}
err = regulator_set_voltage(sc->reg_vqmmc, uvolt, uvolt);
if (err != 0) {
device_printf(sc->dev,
"Cannot set vqmmc to %d<->%d\n",
uvolt,
uvolt);
return (err);
}
return (0);
}
static int
sdhci_xenon_probe(device_t dev)
{
@ -389,6 +456,11 @@ sdhci_xenon_probe(device_t dev)
if ((OF_getencprop(sc->node, "marvell,xenon-phy-zpr", &cid,
sizeof(cid))) > 0)
sc->zpr = cid & XENON_ZPR_MASK;
if (regulator_get_by_ofw_property(dev, 0, "vqmmc-supply",
&sc->reg_vqmmc) == 0 && bootverbose) {
if (bootverbose)
device_printf(dev, "vqmmc-supply regulator found\n");
}
return (0);
}
@ -437,6 +509,12 @@ sdhci_xenon_attach(device_t dev)
slot->max_clk = sc->max_clk;
sc->slot = slot;
/*
* Set up any gpio pin handling described in the FDT data. This cannot
* fail; see comments in sdhci_fdt_gpio.h for details.
*/
sc->gpio = sdhci_fdt_gpio_setup(dev, slot);
if (sdhci_init_slot(dev, sc->slot, 0))
goto fail;
@ -497,6 +575,9 @@ sdhci_xenon_detach(device_t dev)
{
struct sdhci_xenon_softc *sc = device_get_softc(dev);
if (sc->gpio != NULL)
sdhci_fdt_gpio_teardown(sc->gpio);
bus_generic_detach(dev);
bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->irq_res),
@ -526,6 +607,7 @@ static device_method_t sdhci_xenon_methods[] = {
DEVMETHOD(mmcbr_get_ro, sdhci_xenon_get_ro),
DEVMETHOD(mmcbr_acquire_host, sdhci_generic_acquire_host),
DEVMETHOD(mmcbr_release_host, sdhci_generic_release_host),
DEVMETHOD(mmcbr_switch_vccq, sdhci_xenon_switch_vccq),
/* SDHCI registers accessors */
DEVMETHOD(sdhci_read_1, sdhci_xenon_read_1),
@ -536,6 +618,7 @@ static device_method_t sdhci_xenon_methods[] = {
DEVMETHOD(sdhci_write_2, sdhci_xenon_write_2),
DEVMETHOD(sdhci_write_4, sdhci_xenon_write_4),
DEVMETHOD(sdhci_write_multi_4, sdhci_xenon_write_multi_4),
DEVMETHOD(sdhci_get_card_present, sdhci_xenon_get_card_present),
DEVMETHOD_END
};