blob: 54548554df37fd75da0443aae3b8221987252077 [file] [log] [blame]
Sanchayan Maity1b320bd2015-04-15 16:24:27 +05301/*
2 * Copyright (c) 2015 Sanchayan Maity <sanchayan.maity@toradex.com>
3 * Copyright (C) 2015 Toradex AG
4 *
5 * Based on ehci-mx6 driver
6 *
7 * SPDX-License-Identifier: GPL-2.0+
8 */
9
10#include <common.h>
11#include <usb.h>
12#include <errno.h>
13#include <linux/compiler.h>
14#include <asm/io.h>
15#include <asm/arch/clock.h>
16#include <asm/arch/imx-regs.h>
17#include <asm/arch/crm_regs.h>
18#include <asm/imx-common/iomux-v3.h>
19#include <asm/imx-common/regs-usbphy.h>
20#include <usb/ehci-fsl.h>
21
22#include "ehci.h"
23
24#define USB_NC_REG_OFFSET 0x00000800
25
26#define ANADIG_PLL_CTRL_EN_USB_CLKS (1 << 6)
27
28#define UCTRL_OVER_CUR_POL (1 << 8) /* OTG Polarity of Overcurrent */
29#define UCTRL_OVER_CUR_DIS (1 << 7) /* Disable OTG Overcurrent Detection */
30
31/* USBCMD */
32#define UCMD_RUN_STOP (1 << 0) /* controller run/stop */
33#define UCMD_RESET (1 << 1) /* controller reset */
34
35static const unsigned phy_bases[] = {
36 USB_PHY0_BASE_ADDR,
37 USB_PHY1_BASE_ADDR,
38};
39
40static const unsigned nc_reg_bases[] = {
41 USBC0_BASE_ADDR,
42 USBC1_BASE_ADDR,
43};
44
45static void usb_internal_phy_clock_gate(int index)
46{
47 void __iomem *phy_reg;
48
49 phy_reg = (void __iomem *)phy_bases[index];
50 clrbits_le32(phy_reg + USBPHY_CTRL, USBPHY_CTRL_CLKGATE);
51}
52
53static void usb_power_config(int index)
54{
55 struct anadig_reg __iomem *anadig =
56 (struct anadig_reg __iomem *)ANADIG_BASE_ADDR;
57 void __iomem *pll_ctrl;
58
59 switch (index) {
60 case 0:
61 pll_ctrl = &anadig->pll3_ctrl;
62 clrbits_le32(pll_ctrl, ANADIG_PLL3_CTRL_BYPASS);
63 setbits_le32(pll_ctrl, ANADIG_PLL3_CTRL_ENABLE
64 | ANADIG_PLL3_CTRL_POWERDOWN
65 | ANADIG_PLL_CTRL_EN_USB_CLKS);
66 break;
67 case 1:
68 pll_ctrl = &anadig->pll7_ctrl;
69 clrbits_le32(pll_ctrl, ANADIG_PLL7_CTRL_BYPASS);
70 setbits_le32(pll_ctrl, ANADIG_PLL7_CTRL_ENABLE
71 | ANADIG_PLL7_CTRL_POWERDOWN
72 | ANADIG_PLL_CTRL_EN_USB_CLKS);
73 break;
74 default:
75 return;
76 }
77}
78
79static void usb_phy_enable(int index, struct usb_ehci *ehci)
80{
81 void __iomem *phy_reg;
82 void __iomem *phy_ctrl;
83 void __iomem *usb_cmd;
84
85 phy_reg = (void __iomem *)phy_bases[index];
86 phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL);
87 usb_cmd = (void __iomem *)&ehci->usbcmd;
88
89 /* Stop then Reset */
90 clrbits_le32(usb_cmd, UCMD_RUN_STOP);
91 while (readl(usb_cmd) & UCMD_RUN_STOP)
92 ;
93
94 setbits_le32(usb_cmd, UCMD_RESET);
95 while (readl(usb_cmd) & UCMD_RESET)
96 ;
97
98 /* Reset USBPHY module */
99 setbits_le32(phy_ctrl, USBPHY_CTRL_SFTRST);
100 udelay(10);
101
102 /* Remove CLKGATE and SFTRST */
103 clrbits_le32(phy_ctrl, USBPHY_CTRL_CLKGATE | USBPHY_CTRL_SFTRST);
104 udelay(10);
105
106 /* Power up the PHY */
107 writel(0, phy_reg + USBPHY_PWD);
108
109 /* Enable FS/LS device */
110 setbits_le32(phy_ctrl, USBPHY_CTRL_ENUTMILEVEL2 |
111 USBPHY_CTRL_ENUTMILEVEL3);
112}
113
114static void usb_oc_config(int index)
115{
116 void __iomem *ctrl;
117
118 ctrl = (void __iomem *)(nc_reg_bases[index] + USB_NC_REG_OFFSET);
119
120 setbits_le32(ctrl, UCTRL_OVER_CUR_POL);
121 setbits_le32(ctrl, UCTRL_OVER_CUR_DIS);
122}
123
124int ehci_hcd_init(int index, enum usb_init_type init,
125 struct ehci_hccr **hccr, struct ehci_hcor **hcor)
126{
127 struct usb_ehci *ehci;
128
129 if (index >= ARRAY_SIZE(nc_reg_bases))
130 return -EINVAL;
131
132 if (init == USB_INIT_DEVICE && index == 1)
133 return -ENODEV;
134 if (init == USB_INIT_HOST && index == 0)
135 return -ENODEV;
136
137 ehci = (struct usb_ehci *)nc_reg_bases[index];
138
139 usb_power_config(index);
140 usb_oc_config(index);
141 usb_internal_phy_clock_gate(index);
142 usb_phy_enable(index, ehci);
143
144 *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
145 *hcor = (struct ehci_hcor *)((uint32_t)*hccr +
146 HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
147
148 if (init == USB_INIT_DEVICE) {
149 setbits_le32(&ehci->usbmode, CM_DEVICE);
150 writel((PORT_PTS_UTMI | PORT_PTS_PTW), &ehci->portsc);
151 setbits_le32(&ehci->portsc, USB_EN);
152 } else if (init == USB_INIT_HOST) {
153 setbits_le32(&ehci->usbmode, CM_HOST);
154 writel((PORT_PTS_UTMI | PORT_PTS_PTW), &ehci->portsc);
155 setbits_le32(&ehci->portsc, USB_EN);
156 }
157
158 return 0;
159}
160
161int ehci_hcd_stop(int index)
162{
163 return 0;
164}