forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
79 lines
1.8 KiB
79 lines
1.8 KiB
// SPDX-License-Identifier: GPL-2.0+ |
|
/* |
|
* Support of SDHCI for Microchip PIC32 SoC. |
|
* |
|
* Copyright (C) 2015 Microchip Technology Inc. |
|
* Andrei Pistirica <[email protected]> |
|
*/ |
|
|
|
#include <common.h> |
|
#include <dm.h> |
|
#include <sdhci.h> |
|
#include <linux/errno.h> |
|
#include <mach/pic32.h> |
|
|
|
DECLARE_GLOBAL_DATA_PTR; |
|
|
|
static int pic32_sdhci_get_cd(struct sdhci_host *host) |
|
{ |
|
/* PIC32 SDHCI CD errata: |
|
* - set CD_TEST and clear CD_TEST_INS bit |
|
*/ |
|
sdhci_writeb(host, SDHCI_CTRL_CD_TEST, SDHCI_HOST_CONTROL); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct sdhci_ops pic32_sdhci_ops = { |
|
.get_cd = pic32_sdhci_get_cd, |
|
}; |
|
|
|
static int pic32_sdhci_probe(struct udevice *dev) |
|
{ |
|
struct sdhci_host *host = dev_get_priv(dev); |
|
const void *fdt = gd->fdt_blob; |
|
u32 f_min_max[2]; |
|
fdt_addr_t addr; |
|
fdt_size_t size; |
|
int ret; |
|
|
|
addr = fdtdec_get_addr_size(fdt, dev_of_offset(dev), "reg", &size); |
|
if (addr == FDT_ADDR_T_NONE) |
|
return -EINVAL; |
|
|
|
host->ioaddr = ioremap(addr, size); |
|
host->name = dev->name; |
|
host->quirks = SDHCI_QUIRK_NO_HISPD_BIT; |
|
host->bus_width = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), |
|
"bus-width", 4); |
|
host->ops = &pic32_sdhci_ops; |
|
|
|
ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev), |
|
"clock-freq-min-max", f_min_max, 2); |
|
if (ret) { |
|
printf("sdhci: clock-freq-min-max not found\n"); |
|
return ret; |
|
} |
|
|
|
host->max_clk = f_min_max[1]; |
|
|
|
ret = add_sdhci(host, 0, f_min_max[0]); |
|
if (ret) |
|
return ret; |
|
host->mmc->dev = dev; |
|
|
|
return 0; |
|
} |
|
|
|
static const struct udevice_id pic32_sdhci_ids[] = { |
|
{ .compatible = "microchip,pic32mzda-sdhci" }, |
|
{ } |
|
}; |
|
|
|
U_BOOT_DRIVER(pic32_sdhci_drv) = { |
|
.name = "pic32_sdhci", |
|
.id = UCLASS_MMC, |
|
.of_match = pic32_sdhci_ids, |
|
.probe = pic32_sdhci_probe, |
|
.priv_auto_alloc_size = sizeof(struct sdhci_host), |
|
};
|
|
|