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);