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gerrit.cesnet.cz / github / trini / u-boot / 512dce098fd9b5b252e1f4817cd2cdb11af9bdf0 / . / drivers / usb / host / ehci-mxs.c
blob: c795f23bd7fc297a95450fc2d553b30c92d37764 [file] [log] [blame]
Marek Vasutdbb8f272011-11-08 23:18:26 +0000[diff] [blame]1/*
2 * Freescale i.MX28 USB Host driver
3 *
4 * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
5 * on behalf of DENX Software Engineering GmbH
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#include <common.h>
23#include <asm/io.h>
24#include <asm/arch/regs-common.h>
25#include <asm/arch/regs-base.h>
26#include <asm/arch/regs-clkctrl.h>
27#include <asm/arch/regs-usb.h>
28#include <asm/arch/regs-usbphy.h>
29
30#include "ehci-core.h"
31#include "ehci.h"
32
33#if (CONFIG_EHCI_MXS_PORT != 0) && (CONFIG_EHCI_MXS_PORT != 1)
34#error "MXS EHCI: Invalid port selected!"
35#endif
36
37#ifndef CONFIG_EHCI_MXS_PORT
38#error "MXS EHCI: Please define correct port using CONFIG_EHCI_MXS_PORT!"
39#endif
40
41static struct ehci_mxs {
42 struct mx28_usb_regs *usb_regs;
43 struct mx28_usbphy_regs *phy_regs;
44} ehci_mxs;
45
46int mxs_ehci_get_port(struct ehci_mxs *mxs_usb, int port)
47{
48 uint32_t usb_base, phy_base;
49 switch (port) {
50 case 0:
51 usb_base = MXS_USBCTRL0_BASE;
52 phy_base = MXS_USBPHY0_BASE;
53 break;
54 case 1:
55 usb_base = MXS_USBCTRL1_BASE;
56 phy_base = MXS_USBPHY1_BASE;
57 break;
58 default:
59 printf("CONFIG_EHCI_MXS_PORT (port = %d)\n", port);
60 return -1;
61 }
62
63 mxs_usb->usb_regs = (struct mx28_usb_regs *)usb_base;
64 mxs_usb->phy_regs = (struct mx28_usbphy_regs *)phy_base;
65 return 0;
66}
67
68/* This DIGCTL register ungates clock to USB */
69#define HW_DIGCTL_CTRL 0x8001c000
70#define HW_DIGCTL_CTRL_USB0_CLKGATE (1 << 2)
71#define HW_DIGCTL_CTRL_USB1_CLKGATE (1 << 16)
72
73int ehci_hcd_init(void)
74{
75
76 int ret;
77 uint32_t usb_base, cap_base;
78 struct mx28_register *digctl_ctrl =
79 (struct mx28_register *)HW_DIGCTL_CTRL;
80 struct mx28_clkctrl_regs *clkctrl_regs =
81 (struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE;
82
83 ret = mxs_ehci_get_port(&ehci_mxs, CONFIG_EHCI_MXS_PORT);
84 if (ret)
85 return ret;
86
87 /* Reset the PHY block */
88 writel(USBPHY_CTRL_SFTRST, &ehci_mxs.phy_regs->hw_usbphy_ctrl_set);
89 udelay(10);
90 writel(USBPHY_CTRL_SFTRST | USBPHY_CTRL_CLKGATE,
91 &ehci_mxs.phy_regs->hw_usbphy_ctrl_clr);
92
93 /* Enable USB clock */
94 writel(CLKCTRL_PLL0CTRL0_EN_USB_CLKS | CLKCTRL_PLL0CTRL0_POWER,
95 &clkctrl_regs->hw_clkctrl_pll0ctrl0_set);
96 writel(CLKCTRL_PLL1CTRL0_EN_USB_CLKS | CLKCTRL_PLL1CTRL0_POWER,
97 &clkctrl_regs->hw_clkctrl_pll1ctrl0_set);
98
99 writel(HW_DIGCTL_CTRL_USB0_CLKGATE | HW_DIGCTL_CTRL_USB1_CLKGATE,
100 &digctl_ctrl->reg_clr);
101
102 /* Start USB PHY */
103 writel(0, &ehci_mxs.phy_regs->hw_usbphy_pwd);
104
105 /* Enable UTMI+ Level 2 and Level 3 compatibility */
106 writel(USBPHY_CTRL_ENUTMILEVEL3 | USBPHY_CTRL_ENUTMILEVEL2 | 1,
107 &ehci_mxs.phy_regs->hw_usbphy_ctrl_set);
108
109 usb_base = ((uint32_t)ehci_mxs.usb_regs) + 0x100;
110 hccr = (struct ehci_hccr *)usb_base;
111
112 cap_base = ehci_readl(&hccr->cr_capbase);
113 hcor = (struct ehci_hcor *)(usb_base + HC_LENGTH(cap_base));
114
115 return 0;
116}
117
118int ehci_hcd_stop(void)
119{
120 int ret;
121 uint32_t tmp;
122 struct mx28_register *digctl_ctrl =
123 (struct mx28_register *)HW_DIGCTL_CTRL;
124 struct mx28_clkctrl_regs *clkctrl_regs =
125 (struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE;
126
127 ret = mxs_ehci_get_port(&ehci_mxs, CONFIG_EHCI_MXS_PORT);
128 if (ret)
129 return ret;
130
131 /* Stop the USB port */
132 tmp = ehci_readl(&hcor->or_usbcmd);
133 tmp &= ~CMD_RUN;
134 ehci_writel(tmp, &hcor->or_usbcmd);
135
136 /* Disable the PHY */
137 tmp = USBPHY_PWD_RXPWDRX | USBPHY_PWD_RXPWDDIFF |
138 USBPHY_PWD_RXPWD1PT1 | USBPHY_PWD_RXPWDENV |
139 USBPHY_PWD_TXPWDV2I | USBPHY_PWD_TXPWDIBIAS |
140 USBPHY_PWD_TXPWDFS;
141 writel(tmp, &ehci_mxs.phy_regs->hw_usbphy_pwd);
142
143 /* Disable USB clock */
144 writel(CLKCTRL_PLL0CTRL0_EN_USB_CLKS,
145 &clkctrl_regs->hw_clkctrl_pll0ctrl0_clr);
146 writel(CLKCTRL_PLL1CTRL0_EN_USB_CLKS,
147 &clkctrl_regs->hw_clkctrl_pll1ctrl0_clr);
148
149 /* Gate off the USB clock */
150 writel(HW_DIGCTL_CTRL_USB0_CLKGATE | HW_DIGCTL_CTRL_USB1_CLKGATE,
151 &digctl_ctrl->reg_set);
152
153 return 0;
154}