]> git.karo-electronics.de Git - mv-sheeva.git/blob - drivers/usb/otg/ulpi.c
x86, numa: Assign CPUs to nodes in round-robin manner on fake NUMA
[mv-sheeva.git] / drivers / usb / otg / ulpi.c
1 /*
2  * Generic ULPI USB transceiver support
3  *
4  * Copyright (C) 2009 Daniel Mack <daniel@caiaq.de>
5  *
6  * Based on sources from
7  *
8  *   Sascha Hauer <s.hauer@pengutronix.de>
9  *   Freescale Semiconductors
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation; either version 2 of the License, or
14  * (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program; if not, write to the Free Software
23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24  */
25
26 #include <linux/kernel.h>
27 #include <linux/slab.h>
28 #include <linux/usb.h>
29 #include <linux/usb/otg.h>
30 #include <linux/usb/ulpi.h>
31
32 #define ULPI_ID(vendor, product) (((vendor) << 16) | (product))
33
34 /* ULPI hardcoded IDs, used for probing */
35 static unsigned int ulpi_ids[] = {
36         ULPI_ID(0x04cc, 0x1504),        /* NXP ISP1504 */
37         ULPI_ID(0x0424, 0x0006),        /* SMSC USB3319 */
38 };
39
40 static int ulpi_set_otg_flags(struct otg_transceiver *otg)
41 {
42         unsigned int flags = ULPI_OTG_CTRL_DP_PULLDOWN |
43                              ULPI_OTG_CTRL_DM_PULLDOWN;
44
45         if (otg->flags & ULPI_OTG_ID_PULLUP)
46                 flags |= ULPI_OTG_CTRL_ID_PULLUP;
47
48         /*
49          * ULPI Specification rev.1.1 default
50          * for Dp/DmPulldown is enabled.
51          */
52         if (otg->flags & ULPI_OTG_DP_PULLDOWN_DIS)
53                 flags &= ~ULPI_OTG_CTRL_DP_PULLDOWN;
54
55         if (otg->flags & ULPI_OTG_DM_PULLDOWN_DIS)
56                 flags &= ~ULPI_OTG_CTRL_DM_PULLDOWN;
57
58         if (otg->flags & ULPI_OTG_EXTVBUSIND)
59                 flags |= ULPI_OTG_CTRL_EXTVBUSIND;
60
61         return otg_io_write(otg, flags, ULPI_OTG_CTRL);
62 }
63
64 static int ulpi_set_fc_flags(struct otg_transceiver *otg)
65 {
66         unsigned int flags = 0;
67
68         /*
69          * ULPI Specification rev.1.1 default
70          * for XcvrSelect is Full Speed.
71          */
72         if (otg->flags & ULPI_FC_HS)
73                 flags |= ULPI_FUNC_CTRL_HIGH_SPEED;
74         else if (otg->flags & ULPI_FC_LS)
75                 flags |= ULPI_FUNC_CTRL_LOW_SPEED;
76         else if (otg->flags & ULPI_FC_FS4LS)
77                 flags |= ULPI_FUNC_CTRL_FS4LS;
78         else
79                 flags |= ULPI_FUNC_CTRL_FULL_SPEED;
80
81         if (otg->flags & ULPI_FC_TERMSEL)
82                 flags |= ULPI_FUNC_CTRL_TERMSELECT;
83
84         /*
85          * ULPI Specification rev.1.1 default
86          * for OpMode is Normal Operation.
87          */
88         if (otg->flags & ULPI_FC_OP_NODRV)
89                 flags |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
90         else if (otg->flags & ULPI_FC_OP_DIS_NRZI)
91                 flags |= ULPI_FUNC_CTRL_OPMODE_DISABLE_NRZI;
92         else if (otg->flags & ULPI_FC_OP_NSYNC_NEOP)
93                 flags |= ULPI_FUNC_CTRL_OPMODE_NOSYNC_NOEOP;
94         else
95                 flags |= ULPI_FUNC_CTRL_OPMODE_NORMAL;
96
97         /*
98          * ULPI Specification rev.1.1 default
99          * for SuspendM is Powered.
100          */
101         flags |= ULPI_FUNC_CTRL_SUSPENDM;
102
103         return otg_io_write(otg, flags, ULPI_FUNC_CTRL);
104 }
105
106 static int ulpi_set_ic_flags(struct otg_transceiver *otg)
107 {
108         unsigned int flags = 0;
109
110         if (otg->flags & ULPI_IC_AUTORESUME)
111                 flags |= ULPI_IFC_CTRL_AUTORESUME;
112
113         if (otg->flags & ULPI_IC_EXTVBUS_INDINV)
114                 flags |= ULPI_IFC_CTRL_EXTERNAL_VBUS;
115
116         if (otg->flags & ULPI_IC_IND_PASSTHRU)
117                 flags |= ULPI_IFC_CTRL_PASSTHRU;
118
119         if (otg->flags & ULPI_IC_PROTECT_DIS)
120                 flags |= ULPI_IFC_CTRL_PROTECT_IFC_DISABLE;
121
122         return otg_io_write(otg, flags, ULPI_IFC_CTRL);
123 }
124
125 static int ulpi_set_flags(struct otg_transceiver *otg)
126 {
127         int ret;
128
129         ret = ulpi_set_otg_flags(otg);
130         if (ret)
131                 return ret;
132
133         ret = ulpi_set_ic_flags(otg);
134         if (ret)
135                 return ret;
136
137         return ulpi_set_fc_flags(otg);
138 }
139
140 static int ulpi_init(struct otg_transceiver *otg)
141 {
142         int i, vid, pid, ret;
143         u32 ulpi_id = 0;
144
145         for (i = 0; i < 4; i++) {
146                 ret = otg_io_read(otg, ULPI_PRODUCT_ID_HIGH - i);
147                 if (ret < 0)
148                         return ret;
149                 ulpi_id = (ulpi_id << 8) | ret;
150         }
151         vid = ulpi_id & 0xffff;
152         pid = ulpi_id >> 16;
153
154         pr_info("ULPI transceiver vendor/product ID 0x%04x/0x%04x\n", vid, pid);
155
156         for (i = 0; i < ARRAY_SIZE(ulpi_ids); i++)
157                 if (ulpi_ids[i] == ULPI_ID(vid, pid))
158                         return ulpi_set_flags(otg);
159
160         pr_err("ULPI ID does not match any known transceiver.\n");
161         return -ENODEV;
162 }
163
164 static int ulpi_set_host(struct otg_transceiver *otg, struct usb_bus *host)
165 {
166         unsigned int flags = otg_io_read(otg, ULPI_IFC_CTRL);
167
168         if (!host) {
169                 otg->host = NULL;
170                 return 0;
171         }
172
173         otg->host = host;
174
175         flags &= ~(ULPI_IFC_CTRL_6_PIN_SERIAL_MODE |
176                    ULPI_IFC_CTRL_3_PIN_SERIAL_MODE |
177                    ULPI_IFC_CTRL_CARKITMODE);
178
179         if (otg->flags & ULPI_IC_6PIN_SERIAL)
180                 flags |= ULPI_IFC_CTRL_6_PIN_SERIAL_MODE;
181         else if (otg->flags & ULPI_IC_3PIN_SERIAL)
182                 flags |= ULPI_IFC_CTRL_3_PIN_SERIAL_MODE;
183         else if (otg->flags & ULPI_IC_CARKIT)
184                 flags |= ULPI_IFC_CTRL_CARKITMODE;
185
186         return otg_io_write(otg, flags, ULPI_IFC_CTRL);
187 }
188
189 static int ulpi_set_vbus(struct otg_transceiver *otg, bool on)
190 {
191         unsigned int flags = otg_io_read(otg, ULPI_OTG_CTRL);
192
193         flags &= ~(ULPI_OTG_CTRL_DRVVBUS | ULPI_OTG_CTRL_DRVVBUS_EXT);
194
195         if (on) {
196                 if (otg->flags & ULPI_OTG_DRVVBUS)
197                         flags |= ULPI_OTG_CTRL_DRVVBUS;
198
199                 if (otg->flags & ULPI_OTG_DRVVBUS_EXT)
200                         flags |= ULPI_OTG_CTRL_DRVVBUS_EXT;
201         }
202
203         return otg_io_write(otg, flags, ULPI_OTG_CTRL);
204 }
205
206 struct otg_transceiver *
207 otg_ulpi_create(struct otg_io_access_ops *ops,
208                 unsigned int flags)
209 {
210         struct otg_transceiver *otg;
211
212         otg = kzalloc(sizeof(*otg), GFP_KERNEL);
213         if (!otg)
214                 return NULL;
215
216         otg->label      = "ULPI";
217         otg->flags      = flags;
218         otg->io_ops     = ops;
219         otg->init       = ulpi_init;
220         otg->set_host   = ulpi_set_host;
221         otg->set_vbus   = ulpi_set_vbus;
222
223         return otg;
224 }
225 EXPORT_SYMBOL_GPL(otg_ulpi_create);
226