2 * SAMSUNG EXYNOS USB HOST EHCI Controller
4 * Copyright (C) 2012 Samsung Electronics Co.Ltd
5 * Vivek Gautam <gautam.vivek@samsung.com>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
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.
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., 51 Franklin Street, Fifth Floor, Boston,
28 #include <asm/arch/cpu.h>
29 #include <asm/arch/ehci.h>
30 #include <asm/arch/system.h>
31 #include <asm/arch/power.h>
32 #include <asm-generic/errno.h>
33 #include <linux/compat.h>
36 /* Declare global data pointer */
37 DECLARE_GLOBAL_DATA_PTR
;
40 * Contains pointers to register base addresses
41 * for the usb controller.
44 struct exynos_usb_phy
*usb
;
48 static int exynos_usb_parse_dt(const void *blob
, struct exynos_ehci
*exynos
)
53 node
= fdtdec_next_compatible(blob
, 0, COMPAT_SAMSUNG_EXYNOS_EHCI
);
55 debug("EHCI: Can't get device node for ehci\n");
60 * Get the base address for EHCI controller from the device node
62 exynos
->hcd
= (unsigned int *)fdtdec_get_addr(blob
, node
, "reg");
63 if (exynos
->hcd
== NULL
) {
64 debug("Can't get the EHCI register address\n");
69 node
= fdtdec_next_compatible_subnode(blob
, node
,
70 COMPAT_SAMSUNG_EXYNOS_USB_PHY
, &depth
);
72 debug("EHCI: Can't get device node for usb-phy controller\n");
77 * Get the base address for usbphy from the device node
79 exynos
->usb
= (struct exynos_usb_phy
*)fdtdec_get_addr(blob
, node
,
81 if (exynos
->usb
== NULL
) {
82 debug("Can't get the usbphy register address\n");
89 /* Setup the EHCI host controller. */
90 static void setup_usb_phy(struct exynos_usb_phy
*usb
)
92 set_usbhost_mode(USB20_PHY_CFG_HOST_LINK_EN
);
94 set_usbhost_phy_ctrl(POWER_USB_HOST_PHY_CTRL_EN
);
96 clrbits_le32(&usb
->usbphyctrl0
,
97 HOST_CTRL0_FSEL_MASK
|
98 HOST_CTRL0_COMMONON_N
|
99 /* HOST Phy setting */
100 HOST_CTRL0_PHYSWRST
|
101 HOST_CTRL0_PHYSWRSTALL
|
103 HOST_CTRL0_FORCESUSPEND
|
104 HOST_CTRL0_FORCESLEEP
);
106 setbits_le32(&usb
->usbphyctrl0
,
107 /* Setting up the ref freq */
109 /* HOST Phy setting */
110 HOST_CTRL0_LINKSWRST
|
111 HOST_CTRL0_UTMISWRST
);
113 clrbits_le32(&usb
->usbphyctrl0
,
114 HOST_CTRL0_LINKSWRST
|
115 HOST_CTRL0_UTMISWRST
);
118 /* EHCI Ctrl setting */
119 setbits_le32(&usb
->ehcictrl
,
120 EHCICTRL_ENAINCRXALIGN
|
126 /* Reset the EHCI host controller. */
127 static void reset_usb_phy(struct exynos_usb_phy
*usb
)
130 setbits_le32(&usb
->usbphyctrl0
,
131 HOST_CTRL0_PHYSWRST
|
132 HOST_CTRL0_PHYSWRSTALL
|
134 HOST_CTRL0_FORCESUSPEND
|
135 HOST_CTRL0_FORCESLEEP
);
137 set_usbhost_phy_ctrl(POWER_USB_HOST_PHY_CTRL_DISABLE
);
141 * EHCI-initialization
142 * Create the appropriate control structures to manage
143 * a new EHCI host controller.
145 int ehci_hcd_init(int index
, struct ehci_hccr
**hccr
, struct ehci_hcor
**hcor
)
147 struct exynos_ehci
*exynos
= NULL
;
149 exynos
= (struct exynos_ehci
*)
150 kzalloc(sizeof(struct exynos_ehci
), GFP_KERNEL
);
152 debug("failed to allocate exynos ehci context\n");
156 exynos_usb_parse_dt(gd
->fdt_blob
, exynos
);
158 setup_usb_phy(exynos
->usb
);
160 *hccr
= (struct ehci_hccr
*)(exynos
->hcd
);
161 *hcor
= (struct ehci_hcor
*)((uint32_t) *hccr
162 + HC_LENGTH(ehci_readl(&(*hccr
)->cr_capbase
)));
164 debug("Exynos5-ehci: init hccr %x and hcor %x hc_length %d\n",
165 (uint32_t)*hccr
, (uint32_t)*hcor
,
166 (uint32_t)HC_LENGTH(ehci_readl(&(*hccr
)->cr_capbase
)));
174 * Destroy the appropriate control structures corresponding
175 * the EHCI host controller.
177 int ehci_hcd_stop(int index
)
179 struct exynos_ehci
*exynos
= NULL
;
181 exynos
= (struct exynos_ehci
*)
182 kzalloc(sizeof(struct exynos_ehci
), GFP_KERNEL
);
184 debug("failed to allocate exynos ehci context\n");
188 exynos_usb_parse_dt(gd
->fdt_blob
, exynos
);
190 reset_usb_phy(exynos
->usb
);