#include <common.h>
|
#include <ahci.h>
|
#include <dm.h>
|
#include <scsi.h>
|
#include <errno.h>
|
#include <asm/io.h>
|
#include <asm/gpio.h>
|
|
#define AHCI_PHYCS0R 0x00c0
|
#define AHCI_PHYCS1R 0x00c4
|
#define AHCI_PHYCS2R 0x00c8
|
#define AHCI_RWCR 0x00fc
|
|
/* This magic PHY initialisation was taken from the Allwinner releases
|
* and Linux driver, but is completely undocumented.
|
*/
|
static int sunxi_ahci_phy_init(u8 *reg_base)
|
{
|
u32 reg_val;
|
int timeout;
|
|
writel(0, reg_base + AHCI_RWCR);
|
mdelay(5);
|
|
setbits_le32(reg_base + AHCI_PHYCS1R, 0x1 << 19);
|
clrsetbits_le32(reg_base + AHCI_PHYCS0R,
|
(0x7 << 24),
|
(0x5 << 24) | (0x1 << 23) | (0x1 << 18));
|
clrsetbits_le32(reg_base + AHCI_PHYCS1R,
|
(0x3 << 16) | (0x1f << 8) | (0x3 << 6),
|
(0x2 << 16) | (0x6 << 8) | (0x2 << 6));
|
setbits_le32(reg_base + AHCI_PHYCS1R, (0x1 << 28) | (0x1 << 15));
|
clrbits_le32(reg_base + AHCI_PHYCS1R, (0x1 << 19));
|
clrsetbits_le32(reg_base + AHCI_PHYCS0R, (0x7 << 20), (0x3 << 20));
|
clrsetbits_le32(reg_base + AHCI_PHYCS2R, (0x1f << 5), (0x19 << 5));
|
mdelay(5);
|
|
setbits_le32(reg_base + AHCI_PHYCS0R, (0x1 << 19));
|
|
timeout = 250; /* Power up takes approx 50 us */
|
for (;;) {
|
reg_val = readl(reg_base + AHCI_PHYCS0R) & (0x7 << 28);
|
if (reg_val == (0x2 << 28))
|
break;
|
if (--timeout == 0) {
|
printf("AHCI PHY power up failed.\n");
|
return -EIO;
|
}
|
udelay(1);
|
};
|
|
setbits_le32(reg_base + AHCI_PHYCS2R, (0x1 << 24));
|
|
timeout = 100; /* Calibration takes approx 10 us */
|
for (;;) {
|
reg_val = readl(reg_base + AHCI_PHYCS2R) & (0x1 << 24);
|
if (reg_val == 0x0)
|
break;
|
if (--timeout == 0) {
|
printf("AHCI PHY calibration failed.\n");
|
return -EIO;
|
}
|
udelay(1);
|
}
|
|
mdelay(15);
|
|
writel(0x7, reg_base + AHCI_RWCR);
|
|
return 0;
|
}
|
|
#ifndef CONFIG_DM_SCSI
|
void scsi_init(void)
|
{
|
if (sunxi_ahci_phy_init((u8 *)SUNXI_SATA_BASE) < 0)
|
return;
|
|
ahci_init((void __iomem *)SUNXI_SATA_BASE);
|
}
|
#else
|
static int sunxi_sata_probe(struct udevice *dev)
|
{
|
ulong base;
|
u8 *reg;
|
int ret;
|
|
base = dev_read_addr(dev);
|
if (base == FDT_ADDR_T_NONE) {
|
debug("%s: Failed to find address (err=%d\n)", __func__, ret);
|
return -EINVAL;
|
}
|
reg = (u8 *)base;
|
ret = sunxi_ahci_phy_init(reg);
|
if (ret) {
|
debug("%s: Failed to init phy (err=%d\n)", __func__, ret);
|
return ret;
|
}
|
ret = ahci_probe_scsi(dev, base);
|
if (ret) {
|
debug("%s: Failed to probe (err=%d\n)", __func__, ret);
|
return ret;
|
}
|
|
return 0;
|
}
|
|
static int sunxi_sata_bind(struct udevice *dev)
|
{
|
struct udevice *scsi_dev;
|
int ret;
|
|
ret = ahci_bind_scsi(dev, &scsi_dev);
|
if (ret) {
|
debug("%s: Failed to bind (err=%d\n)", __func__, ret);
|
return ret;
|
}
|
|
return 0;
|
}
|
|
static const struct udevice_id sunxi_ahci_ids[] = {
|
{ .compatible = "allwinner,sun4i-a10-ahci" },
|
{ }
|
};
|
|
U_BOOT_DRIVER(ahci_sunxi_drv) = {
|
.name = "ahci_sunxi",
|
.id = UCLASS_AHCI,
|
.of_match = sunxi_ahci_ids,
|
.bind = sunxi_sata_bind,
|
.probe = sunxi_sata_probe,
|
};
|
#endif
|
