1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * DWC SATA platform driver
4 *
5 * (C) Copyright 2016
6 * Texas Instruments Incorporated, <www.ti.com>
7 *
8 * Author: Mugunthan V N <mugunthanvnm@ti.com>
9 */
10
11 #include <common.h>
12 #include <dm.h>
13 #include <ahci.h>
14 #include <scsi.h>
15 #include <sata.h>
16 #include <asm/arch/sata.h>
17 #include <asm/io.h>
18 #include <generic-phy.h>
19
20 struct dwc_ahci_priv {
21 void *base;
22 void *wrapper_base;
23 };
24
dwc_ahci_bind(struct udevice * dev)25 static int dwc_ahci_bind(struct udevice *dev)
26 {
27 struct udevice *scsi_dev;
28
29 return ahci_bind_scsi(dev, &scsi_dev);
30 }
31
dwc_ahci_of_to_plat(struct udevice * dev)32 static int dwc_ahci_of_to_plat(struct udevice *dev)
33 {
34 struct dwc_ahci_priv *priv = dev_get_priv(dev);
35 fdt_addr_t addr;
36
37 priv->base = map_physmem(dev_read_addr(dev), sizeof(void *),
38 MAP_NOCACHE);
39
40 addr = devfdt_get_addr_index(dev, 1);
41 if (addr != FDT_ADDR_T_NONE) {
42 priv->wrapper_base = map_physmem(addr, sizeof(void *),
43 MAP_NOCACHE);
44 } else {
45 priv->wrapper_base = NULL;
46 }
47
48 return 0;
49 }
50
dwc_ahci_probe(struct udevice * dev)51 static int dwc_ahci_probe(struct udevice *dev)
52 {
53 struct dwc_ahci_priv *priv = dev_get_priv(dev);
54 int ret;
55 struct phy phy;
56
57 ret = generic_phy_get_by_name(dev, "sata-phy", &phy);
58 if (ret) {
59 pr_err("can't get the phy from DT\n");
60 return ret;
61 }
62
63 ret = generic_phy_init(&phy);
64 if (ret) {
65 pr_debug("unable to initialize the sata phy\n");
66 return ret;
67 }
68
69 ret = generic_phy_power_on(&phy);
70 if (ret) {
71 pr_debug("unable to power on the sata phy\n");
72 return ret;
73 }
74
75 if (priv->wrapper_base) {
76 u32 val = TI_SATA_IDLE_NO | TI_SATA_STANDBY_NO;
77
78 /* Enable SATA module, No Idle, No Standby */
79 writel(val, priv->wrapper_base + TI_SATA_SYSCONFIG);
80 }
81
82 return ahci_probe_scsi(dev, (ulong)priv->base);
83 }
84
85 static const struct udevice_id dwc_ahci_ids[] = {
86 { .compatible = "snps,dwc-ahci" },
87 { }
88 };
89
90 U_BOOT_DRIVER(dwc_ahci) = {
91 .name = "dwc_ahci",
92 .id = UCLASS_AHCI,
93 .of_match = dwc_ahci_ids,
94 .bind = dwc_ahci_bind,
95 .of_to_plat = dwc_ahci_of_to_plat,
96 .ops = &scsi_ops,
97 .probe = dwc_ahci_probe,
98 .priv_auto = sizeof(struct dwc_ahci_priv),
99 };
100