1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2018 Ramon Fried <ramon.fried@gmail.com>
4 */
5
6 #include <common.h>
7 #include <dm.h>
8 #include <generic-phy.h>
9 #include <usb/ehci-ci.h>
10 #include <usb/ulpi.h>
11 #include <asm/io.h>
12
13 /* PHY viewport regs */
14 #define ULPI_MISC_A_READ 0x96
15 #define ULPI_MISC_A_SET 0x97
16 #define ULPI_MISC_A_CLEAR 0x98
17 #define ULPI_MISC_A_VBUSVLDEXT BIT(0)
18 #define ULPI_MISC_A_VBUSVLDEXTSEL BIT(1)
19 #define GEN2_SESS_VLD_CTRL_EN BIT(7)
20 #define SESS_VLD_CTRL BIT(25)
21
22 struct msm_phy_priv {
23 void __iomem *regs;
24 struct usb_ehci *ehci; /* Start of IP core*/
25 struct ulpi_viewport ulpi_vp; /* ULPI Viewport */
26 };
27
msm_phy_power_on(struct phy * phy)28 static int msm_phy_power_on(struct phy *phy)
29 {
30 struct msm_phy_priv *priv = dev_get_priv(phy->dev);
31
32 /* Select and enable external configuration with USB PHY */
33 ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_SET,
34 ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT);
35
36 return 0;
37 }
38
msm_phy_power_off(struct phy * phy)39 static int msm_phy_power_off(struct phy *phy)
40 {
41 struct msm_phy_priv *priv = dev_get_priv(phy->dev);
42
43 /* Disable VBUS mimicing in the controller. */
44 ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_CLEAR,
45 ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT);
46 return 0;
47 }
48
msm_phy_reset(struct phy * phy)49 static int msm_phy_reset(struct phy *phy)
50 {
51 struct msm_phy_priv *p = dev_get_priv(phy->dev);
52
53 /* select ULPI phy */
54 writel(PORT_PTS_ULPI, &p->ehci->portsc);
55
56 /* Enable sess_vld */
57 setbits_le32(&p->ehci->genconfig2, GEN2_SESS_VLD_CTRL_EN);
58
59 /* Enable external vbus configuration in the LINK */
60 setbits_le32(&p->ehci->usbcmd, SESS_VLD_CTRL);
61
62 /* USB_OTG_HS_AHB_BURST */
63 writel(0x0, &p->ehci->sbuscfg);
64
65 /* USB_OTG_HS_AHB_MODE: HPROT_MODE */
66 /* Bus access related config. */
67 writel(0x08, &p->ehci->sbusmode);
68
69 return 0;
70 }
71
msm_phy_probe(struct udevice * dev)72 static int msm_phy_probe(struct udevice *dev)
73 {
74 struct msm_phy_priv *priv = dev_get_priv(dev);
75
76 priv->regs = dev_remap_addr(dev);
77 if (!priv->regs)
78 return -EINVAL;
79
80 priv->ehci = (struct usb_ehci *)priv->regs;
81 priv->ulpi_vp.port_num = 0;
82
83 /* Warning: this will not work if viewport address is > 64 bit due to
84 * ULPI design.
85 */
86 priv->ulpi_vp.viewport_addr = (phys_addr_t)&priv->ehci->ulpi_viewpoint;
87
88 return 0;
89 }
90
91 static struct phy_ops msm_phy_ops = {
92 .power_on = msm_phy_power_on,
93 .power_off = msm_phy_power_off,
94 .reset = msm_phy_reset,
95 };
96
97 static const struct udevice_id msm_phy_ids[] = {
98 { .compatible = "qcom,apq8016-usbphy" },
99 { }
100 };
101
102 U_BOOT_DRIVER(msm8916_usbphy) = {
103 .name = "msm8916_usbphy",
104 .id = UCLASS_PHY,
105 .of_match = msm_phy_ids,
106 .ops = &msm_phy_ops,
107 .probe = msm_phy_probe,
108 .priv_auto_alloc_size = sizeof(struct msm_phy_priv),
109 };
110