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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"), |
ead5178b | 50 | ULPI_INFO(ULPI_ID(0x0424, 0x0007), "SMSC USB3320"), |
79cb5b53 | 51 | ULPI_INFO(ULPI_ID(0x0424, 0x0009), "SMSC USB334x"), |
ead5178b | 52 | ULPI_INFO(ULPI_ID(0x0451, 0x1507), "TI TUSB1210"), |
2d57a95f DM |
53 | }; |
54 | ||
298b083c | 55 | static int ulpi_set_otg_flags(struct usb_phy *phy) |
2d57a95f | 56 | { |
13dd0c97 IG |
57 | unsigned int flags = ULPI_OTG_CTRL_DP_PULLDOWN | |
58 | ULPI_OTG_CTRL_DM_PULLDOWN; | |
2d57a95f | 59 | |
298b083c | 60 | if (phy->flags & ULPI_OTG_ID_PULLUP) |
fc567f06 | 61 | flags |= ULPI_OTG_CTRL_ID_PULLUP; |
2d57a95f | 62 | |
13dd0c97 IG |
63 | /* |
64 | * ULPI Specification rev.1.1 default | |
65 | * for Dp/DmPulldown is enabled. | |
66 | */ | |
298b083c | 67 | if (phy->flags & ULPI_OTG_DP_PULLDOWN_DIS) |
13dd0c97 | 68 | flags &= ~ULPI_OTG_CTRL_DP_PULLDOWN; |
2d57a95f | 69 | |
298b083c | 70 | if (phy->flags & ULPI_OTG_DM_PULLDOWN_DIS) |
13dd0c97 | 71 | flags &= ~ULPI_OTG_CTRL_DM_PULLDOWN; |
2d57a95f | 72 | |
298b083c | 73 | if (phy->flags & ULPI_OTG_EXTVBUSIND) |
fc567f06 | 74 | flags |= ULPI_OTG_CTRL_EXTVBUSIND; |
2d57a95f | 75 | |
298b083c | 76 | return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL); |
2d57a95f DM |
77 | } |
78 | ||
298b083c | 79 | static int ulpi_set_fc_flags(struct usb_phy *phy) |
13dd0c97 IG |
80 | { |
81 | unsigned int flags = 0; | |
82 | ||
83 | /* | |
84 | * ULPI Specification rev.1.1 default | |
85 | * for XcvrSelect is Full Speed. | |
86 | */ | |
298b083c | 87 | if (phy->flags & ULPI_FC_HS) |
13dd0c97 | 88 | flags |= ULPI_FUNC_CTRL_HIGH_SPEED; |
298b083c | 89 | else if (phy->flags & ULPI_FC_LS) |
13dd0c97 | 90 | flags |= ULPI_FUNC_CTRL_LOW_SPEED; |
298b083c | 91 | else if (phy->flags & ULPI_FC_FS4LS) |
13dd0c97 IG |
92 | flags |= ULPI_FUNC_CTRL_FS4LS; |
93 | else | |
94 | flags |= ULPI_FUNC_CTRL_FULL_SPEED; | |
95 | ||
298b083c | 96 | if (phy->flags & ULPI_FC_TERMSEL) |
13dd0c97 IG |
97 | flags |= ULPI_FUNC_CTRL_TERMSELECT; |
98 | ||
99 | /* | |
100 | * ULPI Specification rev.1.1 default | |
101 | * for OpMode is Normal Operation. | |
102 | */ | |
298b083c | 103 | if (phy->flags & ULPI_FC_OP_NODRV) |
13dd0c97 | 104 | flags |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING; |
298b083c | 105 | else if (phy->flags & ULPI_FC_OP_DIS_NRZI) |
13dd0c97 | 106 | flags |= ULPI_FUNC_CTRL_OPMODE_DISABLE_NRZI; |
298b083c | 107 | else if (phy->flags & ULPI_FC_OP_NSYNC_NEOP) |
13dd0c97 IG |
108 | flags |= ULPI_FUNC_CTRL_OPMODE_NOSYNC_NOEOP; |
109 | else | |
110 | flags |= ULPI_FUNC_CTRL_OPMODE_NORMAL; | |
111 | ||
112 | /* | |
113 | * ULPI Specification rev.1.1 default | |
114 | * for SuspendM is Powered. | |
115 | */ | |
116 | flags |= ULPI_FUNC_CTRL_SUSPENDM; | |
117 | ||
298b083c | 118 | return usb_phy_io_write(phy, flags, ULPI_FUNC_CTRL); |
13dd0c97 IG |
119 | } |
120 | ||
298b083c | 121 | static int ulpi_set_ic_flags(struct usb_phy *phy) |
13dd0c97 IG |
122 | { |
123 | unsigned int flags = 0; | |
124 | ||
298b083c | 125 | if (phy->flags & ULPI_IC_AUTORESUME) |
13dd0c97 IG |
126 | flags |= ULPI_IFC_CTRL_AUTORESUME; |
127 | ||
298b083c | 128 | if (phy->flags & ULPI_IC_EXTVBUS_INDINV) |
13dd0c97 IG |
129 | flags |= ULPI_IFC_CTRL_EXTERNAL_VBUS; |
130 | ||
298b083c | 131 | if (phy->flags & ULPI_IC_IND_PASSTHRU) |
13dd0c97 IG |
132 | flags |= ULPI_IFC_CTRL_PASSTHRU; |
133 | ||
298b083c | 134 | if (phy->flags & ULPI_IC_PROTECT_DIS) |
13dd0c97 IG |
135 | flags |= ULPI_IFC_CTRL_PROTECT_IFC_DISABLE; |
136 | ||
298b083c | 137 | return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL); |
13dd0c97 IG |
138 | } |
139 | ||
298b083c | 140 | static int ulpi_set_flags(struct usb_phy *phy) |
13dd0c97 IG |
141 | { |
142 | int ret; | |
143 | ||
298b083c | 144 | ret = ulpi_set_otg_flags(phy); |
13dd0c97 IG |
145 | if (ret) |
146 | return ret; | |
147 | ||
298b083c | 148 | ret = ulpi_set_ic_flags(phy); |
13dd0c97 IG |
149 | if (ret) |
150 | return ret; | |
151 | ||
298b083c | 152 | return ulpi_set_fc_flags(phy); |
13dd0c97 IG |
153 | } |
154 | ||
298b083c | 155 | static int ulpi_check_integrity(struct usb_phy *phy) |
a9138192 IG |
156 | { |
157 | int ret, i; | |
158 | unsigned int val = 0x55; | |
159 | ||
160 | for (i = 0; i < 2; i++) { | |
298b083c | 161 | ret = usb_phy_io_write(phy, val, ULPI_SCRATCH); |
a9138192 IG |
162 | if (ret < 0) |
163 | return ret; | |
164 | ||
298b083c | 165 | ret = usb_phy_io_read(phy, ULPI_SCRATCH); |
a9138192 IG |
166 | if (ret < 0) |
167 | return ret; | |
168 | ||
169 | if (ret != val) { | |
170 | pr_err("ULPI integrity check: failed!"); | |
171 | return -ENODEV; | |
172 | } | |
173 | val = val << 1; | |
174 | } | |
175 | ||
176 | pr_info("ULPI integrity check: passed.\n"); | |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
298b083c | 181 | static int ulpi_init(struct usb_phy *phy) |
2d57a95f | 182 | { |
7b4a0367 WS |
183 | int i, vid, pid, ret; |
184 | u32 ulpi_id = 0; | |
2d57a95f | 185 | |
7b4a0367 | 186 | for (i = 0; i < 4; i++) { |
298b083c | 187 | ret = usb_phy_io_read(phy, ULPI_PRODUCT_ID_HIGH - i); |
7b4a0367 WS |
188 | if (ret < 0) |
189 | return ret; | |
190 | ulpi_id = (ulpi_id << 8) | ret; | |
191 | } | |
192 | vid = ulpi_id & 0xffff; | |
193 | pid = ulpi_id >> 16; | |
2d57a95f DM |
194 | |
195 | pr_info("ULPI transceiver vendor/product ID 0x%04x/0x%04x\n", vid, pid); | |
196 | ||
96b9e832 IG |
197 | for (i = 0; i < ARRAY_SIZE(ulpi_ids); i++) { |
198 | if (ulpi_ids[i].id == ULPI_ID(vid, pid)) { | |
199 | pr_info("Found %s ULPI transceiver.\n", | |
200 | ulpi_ids[i].name); | |
a9138192 | 201 | break; |
96b9e832 IG |
202 | } |
203 | } | |
a9138192 | 204 | |
298b083c | 205 | ret = ulpi_check_integrity(phy); |
a9138192 IG |
206 | if (ret) |
207 | return ret; | |
2d57a95f | 208 | |
298b083c | 209 | return ulpi_set_flags(phy); |
2d57a95f DM |
210 | } |
211 | ||
298b083c | 212 | static int ulpi_set_host(struct usb_otg *otg, struct usb_bus *host) |
13dd0c97 | 213 | { |
19c1eac2 | 214 | struct usb_phy *phy = otg->usb_phy; |
298b083c | 215 | unsigned int flags = usb_phy_io_read(phy, ULPI_IFC_CTRL); |
13dd0c97 IG |
216 | |
217 | if (!host) { | |
218 | otg->host = NULL; | |
219 | return 0; | |
220 | } | |
221 | ||
222 | otg->host = host; | |
223 | ||
224 | flags &= ~(ULPI_IFC_CTRL_6_PIN_SERIAL_MODE | | |
225 | ULPI_IFC_CTRL_3_PIN_SERIAL_MODE | | |
226 | ULPI_IFC_CTRL_CARKITMODE); | |
227 | ||
298b083c | 228 | if (phy->flags & ULPI_IC_6PIN_SERIAL) |
13dd0c97 | 229 | flags |= ULPI_IFC_CTRL_6_PIN_SERIAL_MODE; |
298b083c | 230 | else if (phy->flags & ULPI_IC_3PIN_SERIAL) |
13dd0c97 | 231 | flags |= ULPI_IFC_CTRL_3_PIN_SERIAL_MODE; |
298b083c | 232 | else if (phy->flags & ULPI_IC_CARKIT) |
13dd0c97 IG |
233 | flags |= ULPI_IFC_CTRL_CARKITMODE; |
234 | ||
298b083c | 235 | return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL); |
13dd0c97 IG |
236 | } |
237 | ||
298b083c | 238 | static int ulpi_set_vbus(struct usb_otg *otg, bool on) |
2d57a95f | 239 | { |
19c1eac2 | 240 | struct usb_phy *phy = otg->usb_phy; |
298b083c | 241 | unsigned int flags = usb_phy_io_read(phy, ULPI_OTG_CTRL); |
2d57a95f | 242 | |
fc567f06 | 243 | flags &= ~(ULPI_OTG_CTRL_DRVVBUS | ULPI_OTG_CTRL_DRVVBUS_EXT); |
2d57a95f DM |
244 | |
245 | if (on) { | |
298b083c | 246 | if (phy->flags & ULPI_OTG_DRVVBUS) |
fc567f06 | 247 | flags |= ULPI_OTG_CTRL_DRVVBUS; |
2d57a95f | 248 | |
298b083c | 249 | if (phy->flags & ULPI_OTG_DRVVBUS_EXT) |
fc567f06 | 250 | flags |= ULPI_OTG_CTRL_DRVVBUS_EXT; |
2d57a95f DM |
251 | } |
252 | ||
298b083c | 253 | return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL); |
2d57a95f DM |
254 | } |
255 | ||
86753811 | 256 | struct usb_phy * |
298b083c | 257 | otg_ulpi_create(struct usb_phy_io_ops *ops, |
2d57a95f DM |
258 | unsigned int flags) |
259 | { | |
298b083c HK |
260 | struct usb_phy *phy; |
261 | struct usb_otg *otg; | |
262 | ||
263 | phy = kzalloc(sizeof(*phy), GFP_KERNEL); | |
264 | if (!phy) | |
265 | return NULL; | |
2d57a95f DM |
266 | |
267 | otg = kzalloc(sizeof(*otg), GFP_KERNEL); | |
298b083c HK |
268 | if (!otg) { |
269 | kfree(phy); | |
2d57a95f | 270 | return NULL; |
298b083c HK |
271 | } |
272 | ||
273 | phy->label = "ULPI"; | |
274 | phy->flags = flags; | |
275 | phy->io_ops = ops; | |
276 | phy->otg = otg; | |
277 | phy->init = ulpi_init; | |
2d57a95f | 278 | |
19c1eac2 | 279 | otg->usb_phy = phy; |
13dd0c97 | 280 | otg->set_host = ulpi_set_host; |
2d57a95f DM |
281 | otg->set_vbus = ulpi_set_vbus; |
282 | ||
298b083c | 283 | return phy; |
2d57a95f DM |
284 | } |
285 | EXPORT_SYMBOL_GPL(otg_ulpi_create); | |
286 |