projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| a6e50a88 IC |
1 | #include <common.h> |
| 2 | #include <ahci.h> | |
| cf7b2e10 | 3 | #include <dm.h> |
| a6e50a88 IC |
4 | #include <scsi.h> |
| 5 | #include <errno.h> | |
| 6 | #include <asm/io.h> | |
| 7 | #include <asm/gpio.h> | |
| 8 | ||
| 9 | #define AHCI_PHYCS0R 0x00c0 | |
| 10 | #define AHCI_PHYCS1R 0x00c4 | |
| 11 | #define AHCI_PHYCS2R 0x00c8 | |
| 12 | #define AHCI_RWCR 0x00fc | |
| 13 | ||
| 14 | /* This magic PHY initialisation was taken from the Allwinner releases | |
| 15 | * and Linux driver, but is completely undocumented. | |
| 16 | */ | |
| cf7b2e10 | 17 | static int sunxi_ahci_phy_init(u8 *reg_base) |
| a6e50a88 | 18 | { |
| a6e50a88 IC |
19 | u32 reg_val; |
| 20 | int timeout; | |
| 21 | ||
| 22 | writel(0, reg_base + AHCI_RWCR); | |
| 23 | mdelay(5); | |
| 24 | ||
| 25 | setbits_le32(reg_base + AHCI_PHYCS1R, 0x1 << 19); | |
| 26 | clrsetbits_le32(reg_base + AHCI_PHYCS0R, | |
| 27 | (0x7 << 24), | |
| 28 | (0x5 << 24) | (0x1 << 23) | (0x1 << 18)); | |
| 29 | clrsetbits_le32(reg_base + AHCI_PHYCS1R, | |
| 30 | (0x3 << 16) | (0x1f << 8) | (0x3 << 6), | |
| 31 | (0x2 << 16) | (0x6 << 8) | (0x2 << 6)); | |
| 32 | setbits_le32(reg_base + AHCI_PHYCS1R, (0x1 << 28) | (0x1 << 15)); | |
| 33 | clrbits_le32(reg_base + AHCI_PHYCS1R, (0x1 << 19)); | |
| 34 | clrsetbits_le32(reg_base + AHCI_PHYCS0R, (0x7 << 20), (0x3 << 20)); | |
| 35 | clrsetbits_le32(reg_base + AHCI_PHYCS2R, (0x1f << 5), (0x19 << 5)); | |
| 36 | mdelay(5); | |
| 37 | ||
| 38 | setbits_le32(reg_base + AHCI_PHYCS0R, (0x1 << 19)); | |
| 39 | ||
| 40 | timeout = 250; /* Power up takes approx 50 us */ | |
| 41 | for (;;) { | |
| 42 | reg_val = readl(reg_base + AHCI_PHYCS0R) & (0x7 << 28); | |
| 43 | if (reg_val == (0x2 << 28)) | |
| 44 | break; | |
| 45 | if (--timeout == 0) { | |
| 46 | printf("AHCI PHY power up failed.\n"); | |
| 47 | return -EIO; | |
| 48 | } | |
| 49 | udelay(1); | |
| 50 | }; | |
| 51 | ||
| 52 | setbits_le32(reg_base + AHCI_PHYCS2R, (0x1 << 24)); | |
| 53 | ||
| 54 | timeout = 100; /* Calibration takes approx 10 us */ | |
| 55 | for (;;) { | |
| 56 | reg_val = readl(reg_base + AHCI_PHYCS2R) & (0x1 << 24); | |
| 57 | if (reg_val == 0x0) | |
| 58 | break; | |
| 59 | if (--timeout == 0) { | |
| 60 | printf("AHCI PHY calibration failed.\n"); | |
| 61 | return -EIO; | |
| 62 | } | |
| 63 | udelay(1); | |
| 64 | } | |
| 65 | ||
| 66 | mdelay(15); | |
| 67 | ||
| 68 | writel(0x7, reg_base + AHCI_RWCR); | |
| 69 | ||
| 70 | return 0; | |
| 71 | } | |
| 72 | ||
| cf7b2e10 SG |
73 | static int sunxi_sata_probe(struct udevice *dev) |
| 74 | { | |
| 75 | ulong base; | |
| 76 | u8 *reg; | |
| 77 | int ret; | |
| 78 | ||
| 79 | base = dev_read_addr(dev); | |
| 80 | if (base == FDT_ADDR_T_NONE) { | |
| 81 | debug("%s: Failed to find address (err=%d\n)", __func__, ret); | |
| 82 | return -EINVAL; | |
| 83 | } | |
| 84 | reg = (u8 *)base; | |
| 85 | ret = sunxi_ahci_phy_init(reg); | |
| 86 | if (ret) { | |
| 87 | debug("%s: Failed to init phy (err=%d\n)", __func__, ret); | |
| 88 | return ret; | |
| 89 | } | |
| 90 | ret = ahci_probe_scsi(dev, base); | |
| 91 | if (ret) { | |
| 92 | debug("%s: Failed to probe (err=%d\n)", __func__, ret); | |
| 93 | return ret; | |
| 94 | } | |
| 95 | ||
| 96 | return 0; | |
| 97 | } | |
| 98 | ||
| 99 | static int sunxi_sata_bind(struct udevice *dev) | |
| 100 | { | |
| 101 | struct udevice *scsi_dev; | |
| 102 | int ret; | |
| 103 | ||
| 104 | ret = ahci_bind_scsi(dev, &scsi_dev); | |
| 105 | if (ret) { | |
| 106 | debug("%s: Failed to bind (err=%d\n)", __func__, ret); | |
| 107 | return ret; | |
| 108 | } | |
| 109 | ||
| 110 | return 0; | |
| 111 | } | |
| 112 | ||
| 113 | static const struct udevice_id sunxi_ahci_ids[] = { | |
| 114 | { .compatible = "allwinner,sun4i-a10-ahci" }, | |
| cbb9cdc7 | 115 | { .compatible = "allwinner,sun8i-r40-ahci" }, |
| cf7b2e10 SG |
116 | { } |
| 117 | }; | |
| 118 | ||
| 119 | U_BOOT_DRIVER(ahci_sunxi_drv) = { | |
| 120 | .name = "ahci_sunxi", | |
| 121 | .id = UCLASS_AHCI, | |
| 122 | .of_match = sunxi_ahci_ids, | |
| 123 | .bind = sunxi_sata_bind, | |
| 124 | .probe = sunxi_sata_probe, | |
| 125 | }; |