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