10 #define AHCI_PHYCS0R 0x00c0
11 #define AHCI_PHYCS1R 0x00c4
12 #define AHCI_PHYCS2R 0x00c8
13 #define AHCI_RWCR 0x00fc
15 /* This magic PHY initialisation was taken from the Allwinner releases
16 * and Linux driver, but is completely undocumented.
18 static int sunxi_ahci_phy_init(u8 *reg_base)
23 writel(0, reg_base + AHCI_RWCR);
26 setbits_le32(reg_base + AHCI_PHYCS1R, 0x1 << 19);
27 clrsetbits_le32(reg_base + AHCI_PHYCS0R,
29 (0x5 << 24) | (0x1 << 23) | (0x1 << 18));
30 clrsetbits_le32(reg_base + AHCI_PHYCS1R,
31 (0x3 << 16) | (0x1f << 8) | (0x3 << 6),
32 (0x2 << 16) | (0x6 << 8) | (0x2 << 6));
33 setbits_le32(reg_base + AHCI_PHYCS1R, (0x1 << 28) | (0x1 << 15));
34 clrbits_le32(reg_base + AHCI_PHYCS1R, (0x1 << 19));
35 clrsetbits_le32(reg_base + AHCI_PHYCS0R, (0x7 << 20), (0x3 << 20));
36 clrsetbits_le32(reg_base + AHCI_PHYCS2R, (0x1f << 5), (0x19 << 5));
39 setbits_le32(reg_base + AHCI_PHYCS0R, (0x1 << 19));
41 timeout = 250; /* Power up takes approx 50 us */
43 reg_val = readl(reg_base + AHCI_PHYCS0R) & (0x7 << 28);
44 if (reg_val == (0x2 << 28))
47 printf("AHCI PHY power up failed.\n");
53 setbits_le32(reg_base + AHCI_PHYCS2R, (0x1 << 24));
55 timeout = 100; /* Calibration takes approx 10 us */
57 reg_val = readl(reg_base + AHCI_PHYCS2R) & (0x1 << 24);
61 printf("AHCI PHY calibration failed.\n");
69 writel(0x7, reg_base + AHCI_RWCR);
74 static int sunxi_sata_probe(struct udevice *dev)
80 base = dev_read_addr(dev);
81 if (base == FDT_ADDR_T_NONE) {
82 debug("%s: Failed to find address (err=%d\n)", __func__, ret);
86 ret = sunxi_ahci_phy_init(reg);
88 debug("%s: Failed to init phy (err=%d\n)", __func__, ret);
91 ret = ahci_probe_scsi(dev, base);
93 debug("%s: Failed to probe (err=%d\n)", __func__, ret);
100 static int sunxi_sata_bind(struct udevice *dev)
102 struct udevice *scsi_dev;
105 ret = ahci_bind_scsi(dev, &scsi_dev);
107 debug("%s: Failed to bind (err=%d\n)", __func__, ret);
114 static const struct udevice_id sunxi_ahci_ids[] = {
115 { .compatible = "allwinner,sun4i-a10-ahci" },
116 { .compatible = "allwinner,sun8i-r40-ahci" },
120 U_BOOT_DRIVER(ahci_sunxi_drv) = {
121 .name = "ahci_sunxi",
123 .of_match = sunxi_ahci_ids,
124 .bind = sunxi_sata_bind,
125 .probe = sunxi_sata_probe,