1 /*
2 * Faraday USB 2.0 EHCI Controller
3 *
4 * (C) Copyright 2010 Faraday Technology
5 * Dante Su <dantesu@faraday-tech.com>
6 *
7 * SPDX-License-Identifier: GPL-2.0+
8 */
9
10 #include <common.h>
11 #include <asm/io.h>
12 #include <usb.h>
13 #include <usb/fusbh200.h>
14 #include <usb/fotg210.h>
15
16 #include "ehci.h"
17
18 #ifndef CONFIG_USB_EHCI_BASE_LIST
19 #define CONFIG_USB_EHCI_BASE_LIST { CONFIG_USB_EHCI_BASE }
20 #endif
21
22 union ehci_faraday_regs {
23 struct fusbh200_regs usb;
24 struct fotg210_regs otg;
25 };
26
ehci_is_fotg2xx(union ehci_faraday_regs * regs)27 static inline int ehci_is_fotg2xx(union ehci_faraday_regs *regs)
28 {
29 return !readl(®s->usb.easstr);
30 }
31
faraday_ehci_set_usbmode(struct ehci_ctrl * ctrl)32 void faraday_ehci_set_usbmode(struct ehci_ctrl *ctrl)
33 {
34 /* nothing needs to be done */
35 }
36
faraday_ehci_get_port_speed(struct ehci_ctrl * ctrl,uint32_t reg)37 int faraday_ehci_get_port_speed(struct ehci_ctrl *ctrl, uint32_t reg)
38 {
39 int spd, ret = PORTSC_PSPD_HS;
40 union ehci_faraday_regs *regs;
41
42 ret = (void __iomem *)((ulong)ctrl->hcor - 0x10);
43 if (ehci_is_fotg2xx(regs))
44 spd = OTGCSR_SPD(readl(®s->otg.otgcsr));
45 else
46 spd = BMCSR_SPD(readl(®s->usb.bmcsr));
47
48 switch (spd) {
49 case 0: /* full speed */
50 ret = PORTSC_PSPD_FS;
51 break;
52 case 1: /* low speed */
53 ret = PORTSC_PSPD_LS;
54 break;
55 case 2: /* high speed */
56 ret = PORTSC_PSPD_HS;
57 break;
58 default:
59 printf("ehci-faraday: invalid device speed\n");
60 break;
61 }
62
63 return ret;
64 }
65
faraday_ehci_get_portsc_register(struct ehci_ctrl * ctrl,int port)66 uint32_t *faraday_ehci_get_portsc_register(struct ehci_ctrl *ctrl, int port)
67 {
68 /* Faraday EHCI has one and only one portsc register */
69 if (port) {
70 /* Printing the message would cause a scan failure! */
71 debug("The request port(%d) is not configured\n", port);
72 return NULL;
73 }
74
75 /* Faraday EHCI PORTSC register offset is 0x20 from hcor */
76 return (uint32_t *)((uint8_t *)ctrl->hcor + 0x20);
77 }
78
79 static const struct ehci_ops faraday_ehci_ops = {
80 .set_usb_mode = faraday_ehci_set_usbmode,
81 .get_port_speed = faraday_ehci_get_port_speed,
82 .get_portsc_register = faraday_ehci_get_portsc_register,
83 };
84
85 /*
86 * Create the appropriate control structures to manage
87 * a new EHCI host controller.
88 */
ehci_hcd_init(int index,enum usb_init_type init,struct ehci_hccr ** ret_hccr,struct ehci_hcor ** ret_hcor)89 int ehci_hcd_init(int index, enum usb_init_type init,
90 struct ehci_hccr **ret_hccr, struct ehci_hcor **ret_hcor)
91 {
92 struct ehci_hccr *hccr;
93 struct ehci_hcor *hcor;
94 union ehci_faraday_regs *regs;
95 uint32_t base_list[] = CONFIG_USB_EHCI_BASE_LIST;
96
97 if (index < 0 || index >= ARRAY_SIZE(base_list))
98 return -1;
99 ehci_set_controller_priv(index, NULL, &faraday_ehci_ops);
100 regs = (void __iomem *)base_list[index];
101 hccr = (struct ehci_hccr *)®s->usb.hccr;
102 hcor = (struct ehci_hcor *)®s->usb.hcor;
103
104 if (ehci_is_fotg2xx(regs)) {
105 /* A-device bus reset */
106 /* ... Power off A-device */
107 setbits_le32(®s->otg.otgcsr, OTGCSR_A_BUSDROP);
108 /* ... Drop vbus and bus traffic */
109 clrbits_le32(®s->otg.otgcsr, OTGCSR_A_BUSREQ);
110 mdelay(1);
111 /* ... Power on A-device */
112 clrbits_le32(®s->otg.otgcsr, OTGCSR_A_BUSDROP);
113 /* ... Drive vbus and bus traffic */
114 setbits_le32(®s->otg.otgcsr, OTGCSR_A_BUSREQ);
115 mdelay(1);
116 /* Disable OTG & DEV interrupts, triggered at level-high */
117 writel(IMR_IRQLH | IMR_OTG | IMR_DEV, ®s->otg.imr);
118 /* Clear all interrupt status */
119 writel(ISR_HOST | ISR_OTG | ISR_DEV, ®s->otg.isr);
120 } else {
121 /* Interrupt=level-high */
122 setbits_le32(®s->usb.bmcsr, BMCSR_IRQLH);
123 /* VBUS on */
124 clrbits_le32(®s->usb.bmcsr, BMCSR_VBUS_OFF);
125 /* Disable all interrupts */
126 writel(0x00, ®s->usb.bmier);
127 writel(0x1f, ®s->usb.bmisr);
128 }
129
130 *ret_hccr = hccr;
131 *ret_hcor = hcor;
132
133 return 0;
134 }
135
136 /*
137 * Destroy the appropriate control structures corresponding
138 * the the EHCI host controller.
139 */
ehci_hcd_stop(int index)140 int ehci_hcd_stop(int index)
141 {
142 return 0;
143 }
144