1 /*
2 * Freescale 83xx USB SOC setup code
3 *
4 * Copyright (C) 2007 Freescale Semiconductor, Inc.
5 * Author: Li Yang
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12
13
14 #include <linux/stddef.h>
15 #include <linux/kernel.h>
16 #include <linux/errno.h>
17 #include <linux/of.h>
18
19 #include <asm/io.h>
20 #include <asm/prom.h>
21 #include <sysdev/fsl_soc.h>
22
23 #include "mpc83xx.h"
24
25
26 #ifdef CONFIG_PPC_MPC834x
mpc834x_usb_cfg(void)27 int mpc834x_usb_cfg(void)
28 {
29 unsigned long sccr, sicrl, sicrh;
30 void __iomem *immap;
31 struct device_node *np = NULL;
32 int port0_is_dr = 0, port1_is_dr = 0;
33 const void *prop, *dr_mode;
34
35 immap = ioremap(get_immrbase(), 0x1000);
36 if (!immap)
37 return -ENOMEM;
38
39 /* Read registers */
40 /* Note: DR and MPH must use the same clock setting in SCCR */
41 sccr = in_be32(immap + MPC83XX_SCCR_OFFS) & ~MPC83XX_SCCR_USB_MASK;
42 sicrl = in_be32(immap + MPC83XX_SICRL_OFFS) & ~MPC834X_SICRL_USB_MASK;
43 sicrh = in_be32(immap + MPC83XX_SICRH_OFFS) & ~MPC834X_SICRH_USB_UTMI;
44
45 np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
46 if (np) {
47 sccr |= MPC83XX_SCCR_USB_DRCM_11; /* 1:3 */
48
49 prop = of_get_property(np, "phy_type", NULL);
50 port1_is_dr = 1;
51 if (prop && (!strcmp(prop, "utmi") ||
52 !strcmp(prop, "utmi_wide"))) {
53 sicrl |= MPC834X_SICRL_USB0 | MPC834X_SICRL_USB1;
54 sicrh |= MPC834X_SICRH_USB_UTMI;
55 port0_is_dr = 1;
56 } else if (prop && !strcmp(prop, "serial")) {
57 dr_mode = of_get_property(np, "dr_mode", NULL);
58 if (dr_mode && !strcmp(dr_mode, "otg")) {
59 sicrl |= MPC834X_SICRL_USB0 | MPC834X_SICRL_USB1;
60 port0_is_dr = 1;
61 } else {
62 sicrl |= MPC834X_SICRL_USB1;
63 }
64 } else if (prop && !strcmp(prop, "ulpi")) {
65 sicrl |= MPC834X_SICRL_USB1;
66 } else {
67 printk(KERN_WARNING "834x USB PHY type not supported\n");
68 }
69 of_node_put(np);
70 }
71 np = of_find_compatible_node(NULL, NULL, "fsl-usb2-mph");
72 if (np) {
73 sccr |= MPC83XX_SCCR_USB_MPHCM_11; /* 1:3 */
74
75 prop = of_get_property(np, "port0", NULL);
76 if (prop) {
77 if (port0_is_dr)
78 printk(KERN_WARNING
79 "834x USB port0 can't be used by both DR and MPH!\n");
80 sicrl &= ~MPC834X_SICRL_USB0;
81 }
82 prop = of_get_property(np, "port1", NULL);
83 if (prop) {
84 if (port1_is_dr)
85 printk(KERN_WARNING
86 "834x USB port1 can't be used by both DR and MPH!\n");
87 sicrl &= ~MPC834X_SICRL_USB1;
88 }
89 of_node_put(np);
90 }
91
92 /* Write back */
93 out_be32(immap + MPC83XX_SCCR_OFFS, sccr);
94 out_be32(immap + MPC83XX_SICRL_OFFS, sicrl);
95 out_be32(immap + MPC83XX_SICRH_OFFS, sicrh);
96
97 iounmap(immap);
98 return 0;
99 }
100 #endif /* CONFIG_PPC_MPC834x */
101
102 #ifdef CONFIG_PPC_MPC831x
mpc831x_usb_cfg(void)103 int mpc831x_usb_cfg(void)
104 {
105 u32 temp;
106 void __iomem *immap, *usb_regs;
107 struct device_node *np = NULL;
108 struct device_node *immr_node = NULL;
109 const void *prop;
110 struct resource res;
111 int ret = 0;
112 #ifdef CONFIG_USB_OTG
113 const void *dr_mode;
114 #endif
115
116 np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
117 if (!np)
118 return -ENODEV;
119 prop = of_get_property(np, "phy_type", NULL);
120
121 /* Map IMMR space for pin and clock settings */
122 immap = ioremap(get_immrbase(), 0x1000);
123 if (!immap) {
124 of_node_put(np);
125 return -ENOMEM;
126 }
127
128 /* Configure clock */
129 immr_node = of_get_parent(np);
130 if (immr_node && (of_device_is_compatible(immr_node, "fsl,mpc8315-immr") ||
131 of_device_is_compatible(immr_node, "fsl,mpc8308-immr")))
132 clrsetbits_be32(immap + MPC83XX_SCCR_OFFS,
133 MPC8315_SCCR_USB_MASK,
134 MPC8315_SCCR_USB_DRCM_01);
135 else
136 clrsetbits_be32(immap + MPC83XX_SCCR_OFFS,
137 MPC83XX_SCCR_USB_MASK,
138 MPC83XX_SCCR_USB_DRCM_11);
139
140 /* Configure pin mux for ULPI. There is no pin mux for UTMI */
141 if (prop && !strcmp(prop, "ulpi")) {
142 if (of_device_is_compatible(immr_node, "fsl,mpc8308-immr")) {
143 clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
144 MPC8308_SICRH_USB_MASK,
145 MPC8308_SICRH_USB_ULPI);
146 } else if (of_device_is_compatible(immr_node, "fsl,mpc8315-immr")) {
147 clrsetbits_be32(immap + MPC83XX_SICRL_OFFS,
148 MPC8315_SICRL_USB_MASK,
149 MPC8315_SICRL_USB_ULPI);
150 clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
151 MPC8315_SICRH_USB_MASK,
152 MPC8315_SICRH_USB_ULPI);
153 } else {
154 clrsetbits_be32(immap + MPC83XX_SICRL_OFFS,
155 MPC831X_SICRL_USB_MASK,
156 MPC831X_SICRL_USB_ULPI);
157 clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
158 MPC831X_SICRH_USB_MASK,
159 MPC831X_SICRH_USB_ULPI);
160 }
161 }
162
163 iounmap(immap);
164
165 if (immr_node)
166 of_node_put(immr_node);
167
168 /* Map USB SOC space */
169 ret = of_address_to_resource(np, 0, &res);
170 if (ret) {
171 of_node_put(np);
172 return ret;
173 }
174 usb_regs = ioremap(res.start, res.end - res.start + 1);
175
176 /* Using on-chip PHY */
177 if (prop && (!strcmp(prop, "utmi_wide") ||
178 !strcmp(prop, "utmi"))) {
179 u32 refsel;
180
181 if (of_device_is_compatible(immr_node, "fsl,mpc8308-immr"))
182 goto out;
183
184 if (of_device_is_compatible(immr_node, "fsl,mpc8315-immr"))
185 refsel = CONTROL_REFSEL_24MHZ;
186 else
187 refsel = CONTROL_REFSEL_48MHZ;
188 /* Set UTMI_PHY_EN and REFSEL */
189 out_be32(usb_regs + FSL_USB2_CONTROL_OFFS,
190 CONTROL_UTMI_PHY_EN | refsel);
191 /* Using external UPLI PHY */
192 } else if (prop && !strcmp(prop, "ulpi")) {
193 /* Set PHY_CLK_SEL to ULPI */
194 temp = CONTROL_PHY_CLK_SEL_ULPI;
195 #ifdef CONFIG_USB_OTG
196 /* Set OTG_PORT */
197 if (!of_device_is_compatible(immr_node, "fsl,mpc8308-immr")) {
198 dr_mode = of_get_property(np, "dr_mode", NULL);
199 if (dr_mode && !strcmp(dr_mode, "otg"))
200 temp |= CONTROL_OTG_PORT;
201 }
202 #endif /* CONFIG_USB_OTG */
203 out_be32(usb_regs + FSL_USB2_CONTROL_OFFS, temp);
204 } else {
205 printk(KERN_WARNING "831x USB PHY type not supported\n");
206 ret = -EINVAL;
207 }
208
209 out:
210 iounmap(usb_regs);
211 of_node_put(np);
212 return ret;
213 }
214 #endif /* CONFIG_PPC_MPC831x */
215
216 #ifdef CONFIG_PPC_MPC837x
mpc837x_usb_cfg(void)217 int mpc837x_usb_cfg(void)
218 {
219 void __iomem *immap;
220 struct device_node *np = NULL;
221 const void *prop;
222 int ret = 0;
223
224 np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
225 if (!np || !of_device_is_available(np))
226 return -ENODEV;
227 prop = of_get_property(np, "phy_type", NULL);
228
229 if (!prop || (strcmp(prop, "ulpi") && strcmp(prop, "serial"))) {
230 printk(KERN_WARNING "837x USB PHY type not supported\n");
231 of_node_put(np);
232 return -EINVAL;
233 }
234
235 /* Map IMMR space for pin and clock settings */
236 immap = ioremap(get_immrbase(), 0x1000);
237 if (!immap) {
238 of_node_put(np);
239 return -ENOMEM;
240 }
241
242 /* Configure clock */
243 clrsetbits_be32(immap + MPC83XX_SCCR_OFFS, MPC837X_SCCR_USB_DRCM_11,
244 MPC837X_SCCR_USB_DRCM_11);
245
246 /* Configure pin mux for ULPI/serial */
247 clrsetbits_be32(immap + MPC83XX_SICRL_OFFS, MPC837X_SICRL_USB_MASK,
248 MPC837X_SICRL_USB_ULPI);
249
250 iounmap(immap);
251 of_node_put(np);
252 return ret;
253 }
254 #endif /* CONFIG_PPC_MPC837x */
255