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mmc:sdhci:fix: Change default interrupts enabled at SDHCI initialization
[u-boot] / drivers / usb / host / ehci-mxs.c
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-mx28.h>
27 #include <asm/arch/regs-usb.h>
28 #include <asm/arch/regs-usbphy.h>
29
30 #include "ehci.h"
31
32 #if     (CONFIG_EHCI_MXS_PORT != 0) && (CONFIG_EHCI_MXS_PORT != 1)
33 #error  "MXS EHCI: Invalid port selected!"
34 #endif
35
36 #ifndef CONFIG_EHCI_MXS_PORT
37 #error  "MXS EHCI: Please define correct port using CONFIG_EHCI_MXS_PORT!"
38 #endif
39
40 static struct ehci_mxs {
41         struct mxs_usb_regs     *usb_regs;
42         struct mxs_usbphy_regs  *phy_regs;
43 } ehci_mxs;
44
45 int mxs_ehci_get_port(struct ehci_mxs *mxs_usb, int port)
46 {
47         uint32_t usb_base, phy_base;
48         switch (port) {
49         case 0:
50                 usb_base = MXS_USBCTRL0_BASE;
51                 phy_base = MXS_USBPHY0_BASE;
52                 break;
53         case 1:
54                 usb_base = MXS_USBCTRL1_BASE;
55                 phy_base = MXS_USBPHY1_BASE;
56                 break;
57         default:
58                 printf("CONFIG_EHCI_MXS_PORT (port = %d)\n", port);
59                 return -1;
60         }
61
62         mxs_usb->usb_regs = (struct mxs_usb_regs *)usb_base;
63         mxs_usb->phy_regs = (struct mxs_usbphy_regs *)phy_base;
64         return 0;
65 }
66
67 /* This DIGCTL register ungates clock to USB */
68 #define HW_DIGCTL_CTRL                  0x8001c000
69 #define HW_DIGCTL_CTRL_USB0_CLKGATE     (1 << 2)
70 #define HW_DIGCTL_CTRL_USB1_CLKGATE     (1 << 16)
71
72 int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
73 {
74
75         int ret;
76         uint32_t usb_base, cap_base;
77         struct mxs_register_32 *digctl_ctrl =
78                 (struct mxs_register_32 *)HW_DIGCTL_CTRL;
79         struct mxs_clkctrl_regs *clkctrl_regs =
80                 (struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
81
82         ret = mxs_ehci_get_port(&ehci_mxs, CONFIG_EHCI_MXS_PORT);
83         if (ret)
84                 return ret;
85
86         /* Reset the PHY block */
87         writel(USBPHY_CTRL_SFTRST, &ehci_mxs.phy_regs->hw_usbphy_ctrl_set);
88         udelay(10);
89         writel(USBPHY_CTRL_SFTRST | USBPHY_CTRL_CLKGATE,
90                 &ehci_mxs.phy_regs->hw_usbphy_ctrl_clr);
91
92         /* Enable USB clock */
93         writel(CLKCTRL_PLL0CTRL0_EN_USB_CLKS | CLKCTRL_PLL0CTRL0_POWER,
94                         &clkctrl_regs->hw_clkctrl_pll0ctrl0_set);
95         writel(CLKCTRL_PLL1CTRL0_EN_USB_CLKS | CLKCTRL_PLL1CTRL0_POWER,
96                         &clkctrl_regs->hw_clkctrl_pll1ctrl0_set);
97
98         writel(HW_DIGCTL_CTRL_USB0_CLKGATE | HW_DIGCTL_CTRL_USB1_CLKGATE,
99                 &digctl_ctrl->reg_clr);
100
101         /* Start USB PHY */
102         writel(0, &ehci_mxs.phy_regs->hw_usbphy_pwd);
103
104         /* Enable UTMI+ Level 2 and Level 3 compatibility */
105         writel(USBPHY_CTRL_ENUTMILEVEL3 | USBPHY_CTRL_ENUTMILEVEL2 | 1,
106                 &ehci_mxs.phy_regs->hw_usbphy_ctrl_set);
107
108         usb_base = ((uint32_t)ehci_mxs.usb_regs) + 0x100;
109         *hccr = (struct ehci_hccr *)usb_base;
110
111         cap_base = ehci_readl(&(*hccr)->cr_capbase);
112         *hcor = (struct ehci_hcor *)(usb_base + HC_LENGTH(cap_base));
113
114         return 0;
115 }
116
117 int ehci_hcd_stop(int index)
118 {
119         int ret;
120         uint32_t usb_base, cap_base, tmp;
121         struct mxs_register_32 *digctl_ctrl =
122                 (struct mxs_register_32 *)HW_DIGCTL_CTRL;
123         struct mxs_clkctrl_regs *clkctrl_regs =
124                 (struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
125         struct ehci_hccr *hccr;
126         struct ehci_hcor *hcor;
127
128         ret = mxs_ehci_get_port(&ehci_mxs, CONFIG_EHCI_MXS_PORT);
129         if (ret)
130                 return ret;
131
132         /* Stop the USB port */
133         usb_base = ((uint32_t)ehci_mxs.usb_regs) + 0x100;
134         hccr = (struct ehci_hccr *)usb_base;
135         cap_base = ehci_readl(&hccr->cr_capbase);
136         hcor = (struct ehci_hcor *)(usb_base + HC_LENGTH(cap_base));
137
138         tmp = ehci_readl(&hcor->or_usbcmd);
139         tmp &= ~CMD_RUN;
140         ehci_writel(tmp, &hcor->or_usbcmd);
141
142         /* Disable the PHY */
143         tmp = USBPHY_PWD_RXPWDRX | USBPHY_PWD_RXPWDDIFF |
144                 USBPHY_PWD_RXPWD1PT1 | USBPHY_PWD_RXPWDENV |
145                 USBPHY_PWD_TXPWDV2I | USBPHY_PWD_TXPWDIBIAS |
146                 USBPHY_PWD_TXPWDFS;
147         writel(tmp, &ehci_mxs.phy_regs->hw_usbphy_pwd);
148
149         /* Disable USB clock */
150         writel(CLKCTRL_PLL0CTRL0_EN_USB_CLKS,
151                         &clkctrl_regs->hw_clkctrl_pll0ctrl0_clr);
152         writel(CLKCTRL_PLL1CTRL0_EN_USB_CLKS,
153                         &clkctrl_regs->hw_clkctrl_pll1ctrl0_clr);
154
155         /* Gate off the USB clock */
156         writel(HW_DIGCTL_CTRL_USB0_CLKGATE | HW_DIGCTL_CTRL_USB1_CLKGATE,
157                 &digctl_ctrl->reg_set);
158
159         return 0;
160 }