dwc_ahci.c
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/*
* DWC SATA platform driver
*
* (C) Copyright 2016
* Texas Instruments Incorporated, <www.ti.com>
*
* Author: Mugunthan V N <mugunthanvnm@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <ahci.h>
#include <scsi.h>
#include <sata.h>
#include <asm/arch/sata.h>
#include <asm/io.h>
#include <generic-phy.h>
DECLARE_GLOBAL_DATA_PTR;
struct dwc_ahci_priv {
void *base;
void *wrapper_base;
};
static int dwc_ahci_ofdata_to_platdata(struct udevice *dev)
{
struct dwc_ahci_priv *priv = dev_get_priv(dev);
struct scsi_platdata *plat = dev_get_uclass_platdata(dev);
fdt_addr_t addr;
plat->max_id = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(dev),
"max-id", CONFIG_SYS_SCSI_MAX_SCSI_ID);
plat->max_lun = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(dev),
"max-lun", CONFIG_SYS_SCSI_MAX_LUN);
priv->base = map_physmem(devfdt_get_addr(dev), sizeof(void *),
MAP_NOCACHE);
addr = devfdt_get_addr_index(dev, 1);
if (addr != FDT_ADDR_T_NONE) {
priv->wrapper_base = map_physmem(addr, sizeof(void *),
MAP_NOCACHE);
} else {
priv->wrapper_base = NULL;
}
return 0;
}
static int dwc_ahci_probe(struct udevice *dev)
{
struct dwc_ahci_priv *priv = dev_get_priv(dev);
int ret;
struct phy phy;
ret = generic_phy_get_by_name(dev, "sata-phy", &phy);
if (ret) {
pr_err("can't get the phy from DT\n");
return ret;
}
ret = generic_phy_init(&phy);
if (ret) {
pr_err("unable to initialize the sata phy\n");
return ret;
}
ret = generic_phy_power_on(&phy);
if (ret) {
pr_err("unable to power on the sata phy\n");
return ret;
}
if (priv->wrapper_base) {
u32 val = TI_SATA_IDLE_NO | TI_SATA_STANDBY_NO;
/* Enable SATA module, No Idle, No Standby */
writel(val, priv->wrapper_base + TI_SATA_SYSCONFIG);
}
ret = ahci_init_dm(dev, priv->base);
if (ret)
return ret;
return ahci_start_ports_dm(dev);
}
static const struct udevice_id dwc_ahci_ids[] = {
{ .compatible = "snps,dwc-ahci" },
{ }
};
U_BOOT_DRIVER(dwc_ahci) = {
.name = "dwc_ahci",
.id = UCLASS_SCSI,
.of_match = dwc_ahci_ids,
.ofdata_to_platdata = dwc_ahci_ofdata_to_platdata,
.ops = &scsi_ops,
.probe = dwc_ahci_probe,
.priv_auto_alloc_size = sizeof(struct dwc_ahci_priv),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};