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2d57a95f DM |
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> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
f940fcd8 | 28 | #include <linux/export.h> |
2d57a95f DM |
29 | #include <linux/usb.h> |
30 | #include <linux/usb/otg.h> | |
31 | #include <linux/usb/ulpi.h> | |
32 | ||
96b9e832 IG |
33 | |
34 | struct ulpi_info { | |
35 | unsigned int id; | |
36 | char *name; | |
37 | }; | |
38 | ||
2d57a95f | 39 | #define ULPI_ID(vendor, product) (((vendor) << 16) | (product)) |
96b9e832 IG |
40 | #define ULPI_INFO(_id, _name) \ |
41 | { \ | |
42 | .id = (_id), \ | |
43 | .name = (_name), \ | |
44 | } | |
2d57a95f | 45 | |
2d57a95f | 46 | /* ULPI hardcoded IDs, used for probing */ |
96b9e832 IG |
47 | static struct ulpi_info ulpi_ids[] = { |
48 | ULPI_INFO(ULPI_ID(0x04cc, 0x1504), "NXP ISP1504"), | |
1e4cba8b | 49 | ULPI_INFO(ULPI_ID(0x0424, 0x0006), "SMSC USB331x"), |
2d57a95f DM |
50 | }; |
51 | ||
298b083c | 52 | static int ulpi_set_otg_flags(struct usb_phy *phy) |
2d57a95f | 53 | { |
13dd0c97 IG |
54 | unsigned int flags = ULPI_OTG_CTRL_DP_PULLDOWN | |
55 | ULPI_OTG_CTRL_DM_PULLDOWN; | |
2d57a95f | 56 | |
298b083c | 57 | if (phy->flags & ULPI_OTG_ID_PULLUP) |
fc567f06 | 58 | flags |= ULPI_OTG_CTRL_ID_PULLUP; |
2d57a95f | 59 | |
13dd0c97 IG |
60 | /* |
61 | * ULPI Specification rev.1.1 default | |
62 | * for Dp/DmPulldown is enabled. | |
63 | */ | |
298b083c | 64 | if (phy->flags & ULPI_OTG_DP_PULLDOWN_DIS) |
13dd0c97 | 65 | flags &= ~ULPI_OTG_CTRL_DP_PULLDOWN; |
2d57a95f | 66 | |
298b083c | 67 | if (phy->flags & ULPI_OTG_DM_PULLDOWN_DIS) |
13dd0c97 | 68 | flags &= ~ULPI_OTG_CTRL_DM_PULLDOWN; |
2d57a95f | 69 | |
298b083c | 70 | if (phy->flags & ULPI_OTG_EXTVBUSIND) |
fc567f06 | 71 | flags |= ULPI_OTG_CTRL_EXTVBUSIND; |
2d57a95f | 72 | |
298b083c | 73 | return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL); |
2d57a95f DM |
74 | } |
75 | ||
298b083c | 76 | static int ulpi_set_fc_flags(struct usb_phy *phy) |
13dd0c97 IG |
77 | { |
78 | unsigned int flags = 0; | |
79 | ||
80 | /* | |
81 | * ULPI Specification rev.1.1 default | |
82 | * for XcvrSelect is Full Speed. | |
83 | */ | |
298b083c | 84 | if (phy->flags & ULPI_FC_HS) |
13dd0c97 | 85 | flags |= ULPI_FUNC_CTRL_HIGH_SPEED; |
298b083c | 86 | else if (phy->flags & ULPI_FC_LS) |
13dd0c97 | 87 | flags |= ULPI_FUNC_CTRL_LOW_SPEED; |
298b083c | 88 | else if (phy->flags & ULPI_FC_FS4LS) |
13dd0c97 IG |
89 | flags |= ULPI_FUNC_CTRL_FS4LS; |
90 | else | |
91 | flags |= ULPI_FUNC_CTRL_FULL_SPEED; | |
92 | ||
298b083c | 93 | if (phy->flags & ULPI_FC_TERMSEL) |
13dd0c97 IG |
94 | flags |= ULPI_FUNC_CTRL_TERMSELECT; |
95 | ||
96 | /* | |
97 | * ULPI Specification rev.1.1 default | |
98 | * for OpMode is Normal Operation. | |
99 | */ | |
298b083c | 100 | if (phy->flags & ULPI_FC_OP_NODRV) |
13dd0c97 | 101 | flags |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING; |
298b083c | 102 | else if (phy->flags & ULPI_FC_OP_DIS_NRZI) |
13dd0c97 | 103 | flags |= ULPI_FUNC_CTRL_OPMODE_DISABLE_NRZI; |
298b083c | 104 | else if (phy->flags & ULPI_FC_OP_NSYNC_NEOP) |
13dd0c97 IG |
105 | flags |= ULPI_FUNC_CTRL_OPMODE_NOSYNC_NOEOP; |
106 | else | |
107 | flags |= ULPI_FUNC_CTRL_OPMODE_NORMAL; | |
108 | ||
109 | /* | |
110 | * ULPI Specification rev.1.1 default | |
111 | * for SuspendM is Powered. | |
112 | */ | |
113 | flags |= ULPI_FUNC_CTRL_SUSPENDM; | |
114 | ||
298b083c | 115 | return usb_phy_io_write(phy, flags, ULPI_FUNC_CTRL); |
13dd0c97 IG |
116 | } |
117 | ||
298b083c | 118 | static int ulpi_set_ic_flags(struct usb_phy *phy) |
13dd0c97 IG |
119 | { |
120 | unsigned int flags = 0; | |
121 | ||
298b083c | 122 | if (phy->flags & ULPI_IC_AUTORESUME) |
13dd0c97 IG |
123 | flags |= ULPI_IFC_CTRL_AUTORESUME; |
124 | ||
298b083c | 125 | if (phy->flags & ULPI_IC_EXTVBUS_INDINV) |
13dd0c97 IG |
126 | flags |= ULPI_IFC_CTRL_EXTERNAL_VBUS; |
127 | ||
298b083c | 128 | if (phy->flags & ULPI_IC_IND_PASSTHRU) |
13dd0c97 IG |
129 | flags |= ULPI_IFC_CTRL_PASSTHRU; |
130 | ||
298b083c | 131 | if (phy->flags & ULPI_IC_PROTECT_DIS) |
13dd0c97 IG |
132 | flags |= ULPI_IFC_CTRL_PROTECT_IFC_DISABLE; |
133 | ||
298b083c | 134 | return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL); |
13dd0c97 IG |
135 | } |
136 | ||
298b083c | 137 | static int ulpi_set_flags(struct usb_phy *phy) |
13dd0c97 IG |
138 | { |
139 | int ret; | |
140 | ||
298b083c | 141 | ret = ulpi_set_otg_flags(phy); |
13dd0c97 IG |
142 | if (ret) |
143 | return ret; | |
144 | ||
298b083c | 145 | ret = ulpi_set_ic_flags(phy); |
13dd0c97 IG |
146 | if (ret) |
147 | return ret; | |
148 | ||
298b083c | 149 | return ulpi_set_fc_flags(phy); |
13dd0c97 IG |
150 | } |
151 | ||
298b083c | 152 | static int ulpi_check_integrity(struct usb_phy *phy) |
a9138192 IG |
153 | { |
154 | int ret, i; | |
155 | unsigned int val = 0x55; | |
156 | ||
157 | for (i = 0; i < 2; i++) { | |
298b083c | 158 | ret = usb_phy_io_write(phy, val, ULPI_SCRATCH); |
a9138192 IG |
159 | if (ret < 0) |
160 | return ret; | |
161 | ||
298b083c | 162 | ret = usb_phy_io_read(phy, ULPI_SCRATCH); |
a9138192 IG |
163 | if (ret < 0) |
164 | return ret; | |
165 | ||
166 | if (ret != val) { | |
167 | pr_err("ULPI integrity check: failed!"); | |
168 | return -ENODEV; | |
169 | } | |
170 | val = val << 1; | |
171 | } | |
172 | ||
173 | pr_info("ULPI integrity check: passed.\n"); | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
298b083c | 178 | static int ulpi_init(struct usb_phy *phy) |
2d57a95f | 179 | { |
7b4a0367 WS |
180 | int i, vid, pid, ret; |
181 | u32 ulpi_id = 0; | |
2d57a95f | 182 | |
7b4a0367 | 183 | for (i = 0; i < 4; i++) { |
298b083c | 184 | ret = usb_phy_io_read(phy, ULPI_PRODUCT_ID_HIGH - i); |
7b4a0367 WS |
185 | if (ret < 0) |
186 | return ret; | |
187 | ulpi_id = (ulpi_id << 8) | ret; | |
188 | } | |
189 | vid = ulpi_id & 0xffff; | |
190 | pid = ulpi_id >> 16; | |
2d57a95f DM |
191 | |
192 | pr_info("ULPI transceiver vendor/product ID 0x%04x/0x%04x\n", vid, pid); | |
193 | ||
96b9e832 IG |
194 | for (i = 0; i < ARRAY_SIZE(ulpi_ids); i++) { |
195 | if (ulpi_ids[i].id == ULPI_ID(vid, pid)) { | |
196 | pr_info("Found %s ULPI transceiver.\n", | |
197 | ulpi_ids[i].name); | |
a9138192 | 198 | break; |
96b9e832 IG |
199 | } |
200 | } | |
a9138192 | 201 | |
298b083c | 202 | ret = ulpi_check_integrity(phy); |
a9138192 IG |
203 | if (ret) |
204 | return ret; | |
2d57a95f | 205 | |
298b083c | 206 | return ulpi_set_flags(phy); |
2d57a95f DM |
207 | } |
208 | ||
298b083c | 209 | static int ulpi_set_host(struct usb_otg *otg, struct usb_bus *host) |
13dd0c97 | 210 | { |
298b083c HK |
211 | struct usb_phy *phy = otg->phy; |
212 | unsigned int flags = usb_phy_io_read(phy, ULPI_IFC_CTRL); | |
13dd0c97 IG |
213 | |
214 | if (!host) { | |
215 | otg->host = NULL; | |
216 | return 0; | |
217 | } | |
218 | ||
219 | otg->host = host; | |
220 | ||
221 | flags &= ~(ULPI_IFC_CTRL_6_PIN_SERIAL_MODE | | |
222 | ULPI_IFC_CTRL_3_PIN_SERIAL_MODE | | |
223 | ULPI_IFC_CTRL_CARKITMODE); | |
224 | ||
298b083c | 225 | if (phy->flags & ULPI_IC_6PIN_SERIAL) |
13dd0c97 | 226 | flags |= ULPI_IFC_CTRL_6_PIN_SERIAL_MODE; |
298b083c | 227 | else if (phy->flags & ULPI_IC_3PIN_SERIAL) |
13dd0c97 | 228 | flags |= ULPI_IFC_CTRL_3_PIN_SERIAL_MODE; |
298b083c | 229 | else if (phy->flags & ULPI_IC_CARKIT) |
13dd0c97 IG |
230 | flags |= ULPI_IFC_CTRL_CARKITMODE; |
231 | ||
298b083c | 232 | return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL); |
13dd0c97 IG |
233 | } |
234 | ||
298b083c | 235 | static int ulpi_set_vbus(struct usb_otg *otg, bool on) |
2d57a95f | 236 | { |
298b083c HK |
237 | struct usb_phy *phy = otg->phy; |
238 | unsigned int flags = usb_phy_io_read(phy, ULPI_OTG_CTRL); | |
2d57a95f | 239 | |
fc567f06 | 240 | flags &= ~(ULPI_OTG_CTRL_DRVVBUS | ULPI_OTG_CTRL_DRVVBUS_EXT); |
2d57a95f DM |
241 | |
242 | if (on) { | |
298b083c | 243 | if (phy->flags & ULPI_OTG_DRVVBUS) |
fc567f06 | 244 | flags |= ULPI_OTG_CTRL_DRVVBUS; |
2d57a95f | 245 | |
298b083c | 246 | if (phy->flags & ULPI_OTG_DRVVBUS_EXT) |
fc567f06 | 247 | flags |= ULPI_OTG_CTRL_DRVVBUS_EXT; |
2d57a95f DM |
248 | } |
249 | ||
298b083c | 250 | return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL); |
2d57a95f DM |
251 | } |
252 | ||
86753811 | 253 | struct usb_phy * |
298b083c | 254 | otg_ulpi_create(struct usb_phy_io_ops *ops, |
2d57a95f DM |
255 | unsigned int flags) |
256 | { | |
298b083c HK |
257 | struct usb_phy *phy; |
258 | struct usb_otg *otg; | |
259 | ||
260 | phy = kzalloc(sizeof(*phy), GFP_KERNEL); | |
261 | if (!phy) | |
262 | return NULL; | |
2d57a95f DM |
263 | |
264 | otg = kzalloc(sizeof(*otg), GFP_KERNEL); | |
298b083c HK |
265 | if (!otg) { |
266 | kfree(phy); | |
2d57a95f | 267 | return NULL; |
298b083c HK |
268 | } |
269 | ||
270 | phy->label = "ULPI"; | |
271 | phy->flags = flags; | |
272 | phy->io_ops = ops; | |
273 | phy->otg = otg; | |
274 | phy->init = ulpi_init; | |
2d57a95f | 275 | |
298b083c | 276 | otg->phy = phy; |
13dd0c97 | 277 | otg->set_host = ulpi_set_host; |
2d57a95f DM |
278 | otg->set_vbus = ulpi_set_vbus; |
279 | ||
298b083c | 280 | return phy; |
2d57a95f DM |
281 | } |
282 | EXPORT_SYMBOL_GPL(otg_ulpi_create); | |
283 |