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f1407d5c KM |
1 | /* |
2 | * Renesas USB driver | |
3 | * | |
4 | * Copyright (C) 2011 Renesas Solutions Corp. | |
5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * along with this program; if not, write to the Free Software | |
14 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
15 | * | |
16 | */ | |
17 | #include <linux/interrupt.h> | |
18 | ||
19 | #include "./common.h" | |
20 | #include "./mod.h" | |
21 | ||
22 | #define usbhs_priv_to_modinfo(priv) (&priv->mod_info) | |
b002ff6e KM |
23 | #define usbhs_mod_info_call(priv, func, param...) \ |
24 | ({ \ | |
25 | struct usbhs_mod_info *info; \ | |
26 | info = usbhs_priv_to_modinfo(priv); \ | |
27 | !info->func ? 0 : \ | |
28 | info->func(param); \ | |
29 | }) | |
30 | ||
31 | /* | |
32 | * autonomy | |
33 | * | |
34 | * these functions are used if platform doesn't have external phy. | |
35 | * -> there is no "notify_hotplug" callback from platform | |
36 | * -> call "notify_hotplug" by itself | |
37 | * -> use own interrupt to connect/disconnect | |
38 | * -> it mean module clock is always ON | |
39 | * ~~~~~~~~~~~~~~~~~~~~~~~~~ | |
40 | */ | |
41 | static int usbhsm_autonomy_get_vbus(struct platform_device *pdev) | |
42 | { | |
43 | struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); | |
44 | ||
45 | return VBSTS & usbhs_read(priv, INTSTS0); | |
46 | } | |
47 | ||
48 | static int usbhsm_autonomy_irq_vbus(struct usbhs_priv *priv, | |
49 | struct usbhs_irq_state *irq_state) | |
50 | { | |
51 | struct platform_device *pdev = usbhs_priv_to_pdev(priv); | |
52 | ||
53 | return usbhsc_drvcllbck_notify_hotplug(pdev); | |
54 | } | |
55 | ||
56 | void usbhs_mod_autonomy_mode(struct usbhs_priv *priv) | |
57 | { | |
58 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
59 | ||
60 | info->irq_vbus = usbhsm_autonomy_irq_vbus; | |
61 | priv->pfunc->get_vbus = usbhsm_autonomy_get_vbus; | |
62 | ||
63 | usbhs_irq_callback_update(priv, NULL); | |
64 | } | |
f1407d5c KM |
65 | |
66 | /* | |
67 | * host / gadget functions | |
68 | * | |
69 | * renesas_usbhs host/gadget can register itself by below functions. | |
70 | * these functions are called when probe | |
71 | * | |
72 | */ | |
73 | void usbhs_mod_register(struct usbhs_priv *priv, struct usbhs_mod *mod, int id) | |
74 | { | |
75 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
76 | ||
77 | info->mod[id] = mod; | |
78 | mod->priv = priv; | |
79 | } | |
80 | ||
81 | struct usbhs_mod *usbhs_mod_get(struct usbhs_priv *priv, int id) | |
82 | { | |
83 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
84 | struct usbhs_mod *ret = NULL; | |
85 | ||
86 | switch (id) { | |
87 | case USBHS_HOST: | |
88 | case USBHS_GADGET: | |
89 | ret = info->mod[id]; | |
90 | break; | |
91 | } | |
92 | ||
93 | return ret; | |
94 | } | |
95 | ||
0deb3e77 | 96 | int usbhs_mod_is_host(struct usbhs_priv *priv) |
f1407d5c | 97 | { |
0deb3e77 | 98 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
f1407d5c KM |
99 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
100 | ||
101 | if (!mod) | |
102 | return -EINVAL; | |
103 | ||
104 | return info->mod[USBHS_HOST] == mod; | |
105 | } | |
106 | ||
107 | struct usbhs_mod *usbhs_mod_get_current(struct usbhs_priv *priv) | |
108 | { | |
109 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
110 | ||
111 | return info->curt; | |
112 | } | |
113 | ||
114 | int usbhs_mod_change(struct usbhs_priv *priv, int id) | |
115 | { | |
116 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
117 | struct usbhs_mod *mod = NULL; | |
118 | int ret = 0; | |
119 | ||
120 | /* id < 0 mean no current */ | |
121 | switch (id) { | |
122 | case USBHS_HOST: | |
123 | case USBHS_GADGET: | |
124 | mod = info->mod[id]; | |
125 | break; | |
126 | default: | |
127 | ret = -EINVAL; | |
128 | } | |
129 | info->curt = mod; | |
130 | ||
131 | return ret; | |
132 | } | |
133 | ||
134 | static irqreturn_t usbhs_interrupt(int irq, void *data); | |
135 | int usbhs_mod_probe(struct usbhs_priv *priv) | |
136 | { | |
137 | struct device *dev = usbhs_priv_to_dev(priv); | |
138 | int ret; | |
139 | ||
2f98382d KM |
140 | /* |
141 | * install host/gadget driver | |
142 | */ | |
143 | ret = usbhs_mod_gadget_probe(priv); | |
144 | if (ret < 0) | |
145 | return ret; | |
146 | ||
f1407d5c KM |
147 | /* irq settings */ |
148 | ret = request_irq(priv->irq, usbhs_interrupt, | |
b5dd18d8 | 149 | 0, dev_name(dev), priv); |
2f98382d | 150 | if (ret) { |
f1407d5c | 151 | dev_err(dev, "irq request err\n"); |
2f98382d KM |
152 | goto mod_init_gadget_err; |
153 | } | |
154 | ||
155 | return ret; | |
156 | ||
157 | mod_init_gadget_err: | |
158 | usbhs_mod_gadget_remove(priv); | |
f1407d5c KM |
159 | |
160 | return ret; | |
161 | } | |
162 | ||
163 | void usbhs_mod_remove(struct usbhs_priv *priv) | |
164 | { | |
2f98382d | 165 | usbhs_mod_gadget_remove(priv); |
f1407d5c KM |
166 | free_irq(priv->irq, priv); |
167 | } | |
168 | ||
169 | /* | |
170 | * status functions | |
171 | */ | |
f1407d5c KM |
172 | int usbhs_status_get_device_state(struct usbhs_irq_state *irq_state) |
173 | { | |
174 | int state = irq_state->intsts0 & DVSQ_MASK; | |
175 | ||
176 | switch (state) { | |
177 | case POWER_STATE: | |
178 | case DEFAULT_STATE: | |
179 | case ADDRESS_STATE: | |
180 | case CONFIGURATION_STATE: | |
181 | return state; | |
182 | } | |
183 | ||
184 | return -EIO; | |
185 | } | |
186 | ||
187 | int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state) | |
188 | { | |
189 | /* | |
190 | * return value | |
191 | * | |
192 | * IDLE_SETUP_STAGE | |
193 | * READ_DATA_STAGE | |
194 | * READ_STATUS_STAGE | |
195 | * WRITE_DATA_STAGE | |
196 | * WRITE_STATUS_STAGE | |
197 | * NODATA_STATUS_STAGE | |
198 | * SEQUENCE_ERROR | |
199 | */ | |
200 | return (int)irq_state->intsts0 & CTSQ_MASK; | |
201 | } | |
202 | ||
203 | static void usbhs_status_get_each_irq(struct usbhs_priv *priv, | |
204 | struct usbhs_irq_state *state) | |
205 | { | |
206 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); | |
207 | ||
208 | state->intsts0 = usbhs_read(priv, INTSTS0); | |
209 | state->intsts1 = usbhs_read(priv, INTSTS1); | |
210 | ||
f1407d5c | 211 | /* mask */ |
5ea68d54 KM |
212 | if (mod) { |
213 | state->brdysts = usbhs_read(priv, BRDYSTS); | |
214 | state->nrdysts = usbhs_read(priv, NRDYSTS); | |
215 | state->bempsts = usbhs_read(priv, BEMPSTS); | |
216 | ||
217 | state->bempsts &= mod->irq_bempsts; | |
218 | state->brdysts &= mod->irq_brdysts; | |
219 | } | |
f1407d5c KM |
220 | } |
221 | ||
222 | /* | |
223 | * interrupt | |
224 | */ | |
225 | #define INTSTS0_MAGIC 0xF800 /* acknowledge magical interrupt sources */ | |
226 | #define INTSTS1_MAGIC 0xA870 /* acknowledge magical interrupt sources */ | |
227 | static irqreturn_t usbhs_interrupt(int irq, void *data) | |
228 | { | |
229 | struct usbhs_priv *priv = data; | |
230 | struct usbhs_irq_state irq_state; | |
231 | ||
232 | usbhs_status_get_each_irq(priv, &irq_state); | |
233 | ||
234 | /* | |
235 | * clear interrupt | |
236 | * | |
237 | * The hardware is _very_ picky to clear interrupt bit. | |
238 | * Especially INTSTS0_MAGIC, INTSTS1_MAGIC value. | |
239 | * | |
240 | * see | |
241 | * "Operation" | |
242 | * - "Control Transfer (DCP)" | |
243 | * - Function :: VALID bit should 0 | |
244 | */ | |
245 | usbhs_write(priv, INTSTS0, ~irq_state.intsts0 & INTSTS0_MAGIC); | |
246 | usbhs_write(priv, INTSTS1, ~irq_state.intsts1 & INTSTS1_MAGIC); | |
247 | ||
248 | usbhs_write(priv, BRDYSTS, 0); | |
249 | usbhs_write(priv, NRDYSTS, 0); | |
250 | usbhs_write(priv, BEMPSTS, 0); | |
251 | ||
252 | /* | |
253 | * call irq callback functions | |
254 | * see also | |
255 | * usbhs_irq_setting_update | |
256 | */ | |
89c1d2e7 KM |
257 | |
258 | /* INTSTS0 */ | |
b002ff6e KM |
259 | if (irq_state.intsts0 & VBINT) |
260 | usbhs_mod_info_call(priv, irq_vbus, priv, &irq_state); | |
261 | ||
f1407d5c KM |
262 | if (irq_state.intsts0 & DVST) |
263 | usbhs_mod_call(priv, irq_dev_state, priv, &irq_state); | |
264 | ||
265 | if (irq_state.intsts0 & CTRT) | |
266 | usbhs_mod_call(priv, irq_ctrl_stage, priv, &irq_state); | |
267 | ||
268 | if (irq_state.intsts0 & BEMP) | |
269 | usbhs_mod_call(priv, irq_empty, priv, &irq_state); | |
270 | ||
271 | if (irq_state.intsts0 & BRDY) | |
272 | usbhs_mod_call(priv, irq_ready, priv, &irq_state); | |
273 | ||
89c1d2e7 KM |
274 | /* INTSTS1 */ |
275 | if (irq_state.intsts1 & ATTCH) | |
276 | usbhs_mod_call(priv, irq_attch, priv, &irq_state); | |
277 | ||
278 | if (irq_state.intsts1 & DTCH) | |
279 | usbhs_mod_call(priv, irq_dtch, priv, &irq_state); | |
280 | ||
281 | if (irq_state.intsts1 & SIGN) | |
282 | usbhs_mod_call(priv, irq_sign, priv, &irq_state); | |
283 | ||
284 | if (irq_state.intsts1 & SACK) | |
285 | usbhs_mod_call(priv, irq_sack, priv, &irq_state); | |
286 | ||
f1407d5c KM |
287 | return IRQ_HANDLED; |
288 | } | |
289 | ||
290 | void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod) | |
291 | { | |
292 | u16 intenb0 = 0; | |
89c1d2e7 | 293 | u16 intenb1 = 0; |
b002ff6e | 294 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
f1407d5c | 295 | |
651f5e49 KM |
296 | /* |
297 | * BEMPENB/BRDYENB are picky. | |
298 | * below method is required | |
299 | * | |
300 | * - clear INTSTS0 | |
301 | * - update BEMPENB/BRDYENB | |
302 | * - update INTSTS0 | |
303 | */ | |
f1407d5c | 304 | usbhs_write(priv, INTENB0, 0); |
89c1d2e7 | 305 | usbhs_write(priv, INTENB1, 0); |
f1407d5c KM |
306 | |
307 | usbhs_write(priv, BEMPENB, 0); | |
308 | usbhs_write(priv, BRDYENB, 0); | |
309 | ||
310 | /* | |
311 | * see also | |
312 | * usbhs_interrupt | |
313 | */ | |
314 | ||
315 | /* | |
316 | * it don't enable DVSE (intenb0) here | |
317 | * but "mod->irq_dev_state" will be called. | |
318 | */ | |
b002ff6e KM |
319 | if (info->irq_vbus) |
320 | intenb0 |= VBSE; | |
f1407d5c | 321 | |
5ea68d54 | 322 | if (mod) { |
89c1d2e7 KM |
323 | /* |
324 | * INTSTS0 | |
325 | */ | |
5ea68d54 KM |
326 | if (mod->irq_ctrl_stage) |
327 | intenb0 |= CTRE; | |
f1407d5c | 328 | |
5ea68d54 KM |
329 | if (mod->irq_empty && mod->irq_bempsts) { |
330 | usbhs_write(priv, BEMPENB, mod->irq_bempsts); | |
331 | intenb0 |= BEMPE; | |
332 | } | |
f1407d5c | 333 | |
5ea68d54 KM |
334 | if (mod->irq_ready && mod->irq_brdysts) { |
335 | usbhs_write(priv, BRDYENB, mod->irq_brdysts); | |
336 | intenb0 |= BRDYE; | |
337 | } | |
89c1d2e7 KM |
338 | |
339 | /* | |
340 | * INTSTS1 | |
341 | */ | |
342 | if (mod->irq_attch) | |
343 | intenb1 |= ATTCHE; | |
344 | ||
345 | if (mod->irq_attch) | |
346 | intenb1 |= DTCHE; | |
347 | ||
348 | if (mod->irq_sign) | |
349 | intenb1 |= SIGNE; | |
350 | ||
351 | if (mod->irq_sack) | |
352 | intenb1 |= SACKE; | |
f1407d5c KM |
353 | } |
354 | ||
651f5e49 KM |
355 | if (intenb0) |
356 | usbhs_write(priv, INTENB0, intenb0); | |
89c1d2e7 KM |
357 | |
358 | if (intenb1) | |
359 | usbhs_write(priv, INTENB1, intenb1); | |
f1407d5c | 360 | } |