2 * (C) Copyright 2009, 2011 Freescale Semiconductor, Inc.
4 * (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB
6 * Author: Tor Krill tor@excito.com
8 * SPDX-License-Identifier: GPL-2.0+
15 #include <usb/ehci-fsl.h>
17 #include <asm/fsl_errata.h>
21 static void set_txfifothresh(struct usb_ehci *, u32);
23 /* Check USB PHY clock valid */
24 static int usb_phy_clk_valid(struct usb_ehci *ehci)
26 if (!((in_be32(&ehci->control) & PHY_CLK_VALID) ||
27 in_be32(&ehci->prictrl))) {
28 printf("USB PHY clock invalid!\n");
36 * Create the appropriate control structures to manage
37 * a new EHCI host controller.
39 * Excerpts from linux ehci fsl driver.
41 int ehci_hcd_init(int index, enum usb_init_type init,
42 struct ehci_hccr **hccr, struct ehci_hcor **hcor)
44 struct usb_ehci *ehci = NULL;
45 const char *phy_type = NULL;
47 char current_usb_controller[5];
48 #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
53 if (has_erratum_a007075()) {
55 * A 5ms delay is needed after applying soft-reset to the
56 * controller to let external ULPI phy come out of reset.
57 * This delay needs to be added before re-initializing
58 * the controller after soft-resetting completes
62 memset(current_usb_controller, '\0', 5);
63 snprintf(current_usb_controller, 4, "usb%d", index+1);
67 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB1_ADDR;
70 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB2_ADDR;
73 printf("ERROR: wrong controller index!!\n");
77 *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
78 *hcor = (struct ehci_hcor *)((uint32_t) *hccr +
79 HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
81 /* Set to Host mode */
82 setbits_le32(&ehci->usbmode, CM_HOST);
84 out_be32(&ehci->snoop1, SNOOP_SIZE_2GB);
85 out_be32(&ehci->snoop2, 0x80000000 | SNOOP_SIZE_2GB);
88 if (hwconfig_sub(current_usb_controller, "phy_type"))
89 phy_type = hwconfig_subarg(current_usb_controller,
92 phy_type = getenv("usb_phy_type");
95 #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
96 /* if none specified assume internal UTMI */
97 strcpy(usb_phy, "utmi");
100 printf("WARNING: USB phy type not defined !!\n");
105 if (!strncmp(phy_type, "utmi", 4)) {
106 #if defined(CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY)
107 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
109 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
111 udelay(1000); /* delay required for PHY Clk to appear */
113 out_le32(&(*hcor)->or_portsc[0], PORT_PTS_UTMI);
114 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
117 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
119 clrsetbits_be32(&ehci->control, UTMI_PHY_EN |
120 CONTROL_REGISTER_W1C_MASK, USB_EN);
121 udelay(1000); /* delay required for PHY Clk to appear */
122 if (!usb_phy_clk_valid(ehci))
124 out_le32(&(*hcor)->or_portsc[0], PORT_PTS_ULPI);
127 out_be32(&ehci->prictrl, 0x0000000c);
128 out_be32(&ehci->age_cnt_limit, 0x00000040);
129 out_be32(&ehci->sictrl, 0x00000001);
131 in_le32(&ehci->usbmode);
133 if (SVR_SOC_VER(get_svr()) == SVR_T4240 &&
134 IS_SVR_REV(get_svr(), 2, 0))
135 set_txfifothresh(ehci, TXFIFOTHRESH);
141 * Destroy the appropriate control structures corresponding
142 * the the EHCI host controller.
144 int ehci_hcd_stop(int index)
150 * Setting the value of TXFIFO_THRESH field in TXFILLTUNING register
151 * to counter DDR latencies in writing data into Tx buffer.
152 * This prevents Tx buffer from getting underrun
154 static void set_txfifothresh(struct usb_ehci *ehci, u32 txfifo_thresh)
157 cmd = ehci_readl(&ehci->txfilltuning);
158 cmd &= ~TXFIFO_THRESH_MASK;
159 cmd |= TXFIFO_THRESH(txfifo_thresh);
160 ehci_writel(&ehci->txfilltuning, cmd);