/arch/powerpc/platforms/83xx/usb.c
C | 243 lines | 186 code | 31 blank | 26 comment | 44 complexity | 4d7317e67027f13560e7d7f329cec0e1 MD5 | raw file
Possible License(s): CC-BY-SA-3.0, GPL-2.0, LGPL-2.0, AGPL-1.0
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
27int 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
103int 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 clrsetbits_be32(immap + MPC83XX_SCCR_OFFS,
132 MPC8315_SCCR_USB_MASK,
133 MPC8315_SCCR_USB_DRCM_01);
134 else
135 clrsetbits_be32(immap + MPC83XX_SCCR_OFFS,
136 MPC83XX_SCCR_USB_MASK,
137 MPC83XX_SCCR_USB_DRCM_11);
138
139 /* Configure pin mux for ULPI. There is no pin mux for UTMI */
140 if (prop && !strcmp(prop, "ulpi")) {
141 if (of_device_is_compatible(immr_node, "fsl,mpc8315-immr")) {
142 clrsetbits_be32(immap + MPC83XX_SICRL_OFFS,
143 MPC8315_SICRL_USB_MASK,
144 MPC8315_SICRL_USB_ULPI);
145 clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
146 MPC8315_SICRH_USB_MASK,
147 MPC8315_SICRH_USB_ULPI);
148 } else {
149 clrsetbits_be32(immap + MPC83XX_SICRL_OFFS,
150 MPC831X_SICRL_USB_MASK,
151 MPC831X_SICRL_USB_ULPI);
152 clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
153 MPC831X_SICRH_USB_MASK,
154 MPC831X_SICRH_USB_ULPI);
155 }
156 }
157
158 iounmap(immap);
159
160 if (immr_node)
161 of_node_put(immr_node);
162
163 /* Map USB SOC space */
164 ret = of_address_to_resource(np, 0, &res);
165 if (ret) {
166 of_node_put(np);
167 return ret;
168 }
169 usb_regs = ioremap(res.start, res.end - res.start + 1);
170
171 /* Using on-chip PHY */
172 if (prop && (!strcmp(prop, "utmi_wide") ||
173 !strcmp(prop, "utmi"))) {
174 u32 refsel;
175
176 if (of_device_is_compatible(immr_node, "fsl,mpc8315-immr"))
177 refsel = CONTROL_REFSEL_24MHZ;
178 else
179 refsel = CONTROL_REFSEL_48MHZ;
180 /* Set UTMI_PHY_EN and REFSEL */
181 out_be32(usb_regs + FSL_USB2_CONTROL_OFFS,
182 CONTROL_UTMI_PHY_EN | refsel);
183 /* Using external UPLI PHY */
184 } else if (prop && !strcmp(prop, "ulpi")) {
185 /* Set PHY_CLK_SEL to ULPI */
186 temp = CONTROL_PHY_CLK_SEL_ULPI;
187#ifdef CONFIG_USB_OTG
188 /* Set OTG_PORT */
189 dr_mode = of_get_property(np, "dr_mode", NULL);
190 if (dr_mode && !strcmp(dr_mode, "otg"))
191 temp |= CONTROL_OTG_PORT;
192#endif /* CONFIG_USB_OTG */
193 out_be32(usb_regs + FSL_USB2_CONTROL_OFFS, temp);
194 } else {
195 printk(KERN_WARNING "831x USB PHY type not supported\n");
196 ret = -EINVAL;
197 }
198
199 iounmap(usb_regs);
200 of_node_put(np);
201 return ret;
202}
203#endif /* CONFIG_PPC_MPC831x */
204
205#ifdef CONFIG_PPC_MPC837x
206int mpc837x_usb_cfg(void)
207{
208 void __iomem *immap;
209 struct device_node *np = NULL;
210 const void *prop;
211 int ret = 0;
212
213 np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
214 if (!np || !of_device_is_available(np))
215 return -ENODEV;
216 prop = of_get_property(np, "phy_type", NULL);
217
218 if (!prop || (strcmp(prop, "ulpi") && strcmp(prop, "serial"))) {
219 printk(KERN_WARNING "837x USB PHY type not supported\n");
220 of_node_put(np);
221 return -EINVAL;
222 }
223
224 /* Map IMMR space for pin and clock settings */
225 immap = ioremap(get_immrbase(), 0x1000);
226 if (!immap) {
227 of_node_put(np);
228 return -ENOMEM;
229 }
230
231 /* Configure clock */
232 clrsetbits_be32(immap + MPC83XX_SCCR_OFFS, MPC837X_SCCR_USB_DRCM_11,
233 MPC837X_SCCR_USB_DRCM_11);
234
235 /* Configure pin mux for ULPI/serial */
236 clrsetbits_be32(immap + MPC83XX_SICRL_OFFS, MPC837X_SICRL_USB_MASK,
237 MPC837X_SICRL_USB_ULPI);
238
239 iounmap(immap);
240 of_node_put(np);
241 return ret;
242}
243#endif /* CONFIG_PPC_MPC837x */