1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Freescale 83xx USB SOC setup code
5 * Copyright (C) 2007 Freescale Semiconductor, Inc.
9 #include <linux/stddef.h>
10 #include <linux/kernel.h>
11 #include <linux/errno.h>
13 #include <linux/of_address.h>
16 #include <sysdev/fsl_soc.h>
20 int __init mpc831x_usb_cfg(void)
23 void __iomem *immap, *usb_regs;
24 struct device_node *np = NULL;
25 struct device_node *immr_node = NULL;
33 np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
36 prop = of_get_property(np, "phy_type", NULL);
38 /* Map IMMR space for pin and clock settings */
39 immap = ioremap(get_immrbase(), 0x1000);
46 immr_node = of_get_parent(np);
47 if (immr_node && (of_device_is_compatible(immr_node, "fsl,mpc8315-immr") ||
48 of_device_is_compatible(immr_node, "fsl,mpc8308-immr")))
49 clrsetbits_be32(immap + MPC83XX_SCCR_OFFS,
50 MPC8315_SCCR_USB_MASK,
51 MPC8315_SCCR_USB_DRCM_01);
53 clrsetbits_be32(immap + MPC83XX_SCCR_OFFS,
54 MPC83XX_SCCR_USB_MASK,
55 MPC83XX_SCCR_USB_DRCM_11);
57 /* Configure pin mux for ULPI. There is no pin mux for UTMI */
58 if (prop && !strcmp(prop, "ulpi")) {
59 if (of_device_is_compatible(immr_node, "fsl,mpc8308-immr")) {
60 clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
61 MPC8308_SICRH_USB_MASK,
62 MPC8308_SICRH_USB_ULPI);
63 } else if (of_device_is_compatible(immr_node, "fsl,mpc8315-immr")) {
64 clrsetbits_be32(immap + MPC83XX_SICRL_OFFS,
65 MPC8315_SICRL_USB_MASK,
66 MPC8315_SICRL_USB_ULPI);
67 clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
68 MPC8315_SICRH_USB_MASK,
69 MPC8315_SICRH_USB_ULPI);
71 clrsetbits_be32(immap + MPC83XX_SICRL_OFFS,
72 MPC831X_SICRL_USB_MASK,
73 MPC831X_SICRL_USB_ULPI);
74 clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
75 MPC831X_SICRH_USB_MASK,
76 MPC831X_SICRH_USB_ULPI);
82 of_node_put(immr_node);
84 /* Map USB SOC space */
85 ret = of_address_to_resource(np, 0, &res);
90 usb_regs = ioremap(res.start, resource_size(&res));
92 /* Using on-chip PHY */
93 if (prop && (!strcmp(prop, "utmi_wide") || !strcmp(prop, "utmi"))) {
96 if (of_device_is_compatible(immr_node, "fsl,mpc8308-immr"))
99 if (of_device_is_compatible(immr_node, "fsl,mpc8315-immr"))
100 refsel = CONTROL_REFSEL_24MHZ;
102 refsel = CONTROL_REFSEL_48MHZ;
103 /* Set UTMI_PHY_EN and REFSEL */
104 out_be32(usb_regs + FSL_USB2_CONTROL_OFFS,
105 CONTROL_UTMI_PHY_EN | refsel);
106 /* Using external UPLI PHY */
107 } else if (prop && !strcmp(prop, "ulpi")) {
108 /* Set PHY_CLK_SEL to ULPI */
109 temp = CONTROL_PHY_CLK_SEL_ULPI;
110 #ifdef CONFIG_USB_OTG
112 if (!of_device_is_compatible(immr_node, "fsl,mpc8308-immr")) {
113 dr_mode = of_get_property(np, "dr_mode", NULL);
114 if (dr_mode && !strcmp(dr_mode, "otg"))
115 temp |= CONTROL_OTG_PORT;
117 #endif /* CONFIG_USB_OTG */
118 out_be32(usb_regs + FSL_USB2_CONTROL_OFFS, temp);
120 pr_warn("831x USB PHY type not supported\n");