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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 | ||
b4fcea2a KM |
53 | renesas_usbhs_call_notify_hotplug(pdev); |
54 | ||
55 | return 0; | |
b002ff6e KM |
56 | } |
57 | ||
58 | void usbhs_mod_autonomy_mode(struct usbhs_priv *priv) | |
59 | { | |
60 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
61 | ||
62 | info->irq_vbus = usbhsm_autonomy_irq_vbus; | |
48298206 | 63 | priv->pfunc.get_vbus = usbhsm_autonomy_get_vbus; |
b002ff6e KM |
64 | |
65 | usbhs_irq_callback_update(priv, NULL); | |
66 | } | |
f1407d5c KM |
67 | |
68 | /* | |
69 | * host / gadget functions | |
70 | * | |
71 | * renesas_usbhs host/gadget can register itself by below functions. | |
72 | * these functions are called when probe | |
73 | * | |
74 | */ | |
75 | void usbhs_mod_register(struct usbhs_priv *priv, struct usbhs_mod *mod, int id) | |
76 | { | |
77 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
78 | ||
79 | info->mod[id] = mod; | |
80 | mod->priv = priv; | |
81 | } | |
82 | ||
83 | struct usbhs_mod *usbhs_mod_get(struct usbhs_priv *priv, int id) | |
84 | { | |
85 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
86 | struct usbhs_mod *ret = NULL; | |
87 | ||
88 | switch (id) { | |
89 | case USBHS_HOST: | |
90 | case USBHS_GADGET: | |
91 | ret = info->mod[id]; | |
92 | break; | |
93 | } | |
94 | ||
95 | return ret; | |
96 | } | |
97 | ||
0deb3e77 | 98 | int usbhs_mod_is_host(struct usbhs_priv *priv) |
f1407d5c | 99 | { |
0deb3e77 | 100 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
f1407d5c KM |
101 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
102 | ||
103 | if (!mod) | |
104 | return -EINVAL; | |
105 | ||
106 | return info->mod[USBHS_HOST] == mod; | |
107 | } | |
108 | ||
109 | struct usbhs_mod *usbhs_mod_get_current(struct usbhs_priv *priv) | |
110 | { | |
111 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
112 | ||
113 | return info->curt; | |
114 | } | |
115 | ||
116 | int usbhs_mod_change(struct usbhs_priv *priv, int id) | |
117 | { | |
118 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
119 | struct usbhs_mod *mod = NULL; | |
120 | int ret = 0; | |
121 | ||
122 | /* id < 0 mean no current */ | |
123 | switch (id) { | |
124 | case USBHS_HOST: | |
125 | case USBHS_GADGET: | |
126 | mod = info->mod[id]; | |
127 | break; | |
128 | default: | |
129 | ret = -EINVAL; | |
130 | } | |
131 | info->curt = mod; | |
132 | ||
133 | return ret; | |
134 | } | |
135 | ||
136 | static irqreturn_t usbhs_interrupt(int irq, void *data); | |
137 | int usbhs_mod_probe(struct usbhs_priv *priv) | |
138 | { | |
139 | struct device *dev = usbhs_priv_to_dev(priv); | |
140 | int ret; | |
141 | ||
2f98382d KM |
142 | /* |
143 | * install host/gadget driver | |
144 | */ | |
034d7c13 | 145 | ret = usbhs_mod_host_probe(priv); |
2f98382d KM |
146 | if (ret < 0) |
147 | return ret; | |
148 | ||
034d7c13 KM |
149 | ret = usbhs_mod_gadget_probe(priv); |
150 | if (ret < 0) | |
151 | goto mod_init_host_err; | |
152 | ||
f1407d5c KM |
153 | /* irq settings */ |
154 | ret = request_irq(priv->irq, usbhs_interrupt, | |
53069af3 | 155 | priv->irqflags, dev_name(dev), priv); |
2f98382d | 156 | if (ret) { |
f1407d5c | 157 | dev_err(dev, "irq request err\n"); |
2f98382d KM |
158 | goto mod_init_gadget_err; |
159 | } | |
160 | ||
161 | return ret; | |
162 | ||
163 | mod_init_gadget_err: | |
164 | usbhs_mod_gadget_remove(priv); | |
034d7c13 KM |
165 | mod_init_host_err: |
166 | usbhs_mod_host_remove(priv); | |
f1407d5c KM |
167 | |
168 | return ret; | |
169 | } | |
170 | ||
171 | void usbhs_mod_remove(struct usbhs_priv *priv) | |
172 | { | |
034d7c13 | 173 | usbhs_mod_host_remove(priv); |
2f98382d | 174 | usbhs_mod_gadget_remove(priv); |
f1407d5c KM |
175 | free_irq(priv->irq, priv); |
176 | } | |
177 | ||
178 | /* | |
179 | * status functions | |
180 | */ | |
f1407d5c KM |
181 | int usbhs_status_get_device_state(struct usbhs_irq_state *irq_state) |
182 | { | |
183 | int state = irq_state->intsts0 & DVSQ_MASK; | |
184 | ||
185 | switch (state) { | |
186 | case POWER_STATE: | |
187 | case DEFAULT_STATE: | |
188 | case ADDRESS_STATE: | |
189 | case CONFIGURATION_STATE: | |
190 | return state; | |
191 | } | |
192 | ||
193 | return -EIO; | |
194 | } | |
195 | ||
196 | int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state) | |
197 | { | |
198 | /* | |
199 | * return value | |
200 | * | |
201 | * IDLE_SETUP_STAGE | |
202 | * READ_DATA_STAGE | |
203 | * READ_STATUS_STAGE | |
204 | * WRITE_DATA_STAGE | |
205 | * WRITE_STATUS_STAGE | |
206 | * NODATA_STATUS_STAGE | |
207 | * SEQUENCE_ERROR | |
208 | */ | |
209 | return (int)irq_state->intsts0 & CTSQ_MASK; | |
210 | } | |
211 | ||
212 | static void usbhs_status_get_each_irq(struct usbhs_priv *priv, | |
213 | struct usbhs_irq_state *state) | |
214 | { | |
215 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); | |
216 | ||
217 | state->intsts0 = usbhs_read(priv, INTSTS0); | |
218 | state->intsts1 = usbhs_read(priv, INTSTS1); | |
219 | ||
f1407d5c | 220 | /* mask */ |
5ea68d54 KM |
221 | if (mod) { |
222 | state->brdysts = usbhs_read(priv, BRDYSTS); | |
223 | state->nrdysts = usbhs_read(priv, NRDYSTS); | |
224 | state->bempsts = usbhs_read(priv, BEMPSTS); | |
225 | ||
226 | state->bempsts &= mod->irq_bempsts; | |
227 | state->brdysts &= mod->irq_brdysts; | |
228 | } | |
f1407d5c KM |
229 | } |
230 | ||
231 | /* | |
232 | * interrupt | |
233 | */ | |
234 | #define INTSTS0_MAGIC 0xF800 /* acknowledge magical interrupt sources */ | |
235 | #define INTSTS1_MAGIC 0xA870 /* acknowledge magical interrupt sources */ | |
236 | static irqreturn_t usbhs_interrupt(int irq, void *data) | |
237 | { | |
238 | struct usbhs_priv *priv = data; | |
239 | struct usbhs_irq_state irq_state; | |
240 | ||
241 | usbhs_status_get_each_irq(priv, &irq_state); | |
242 | ||
243 | /* | |
244 | * clear interrupt | |
245 | * | |
246 | * The hardware is _very_ picky to clear interrupt bit. | |
247 | * Especially INTSTS0_MAGIC, INTSTS1_MAGIC value. | |
248 | * | |
249 | * see | |
250 | * "Operation" | |
251 | * - "Control Transfer (DCP)" | |
252 | * - Function :: VALID bit should 0 | |
253 | */ | |
254 | usbhs_write(priv, INTSTS0, ~irq_state.intsts0 & INTSTS0_MAGIC); | |
255 | usbhs_write(priv, INTSTS1, ~irq_state.intsts1 & INTSTS1_MAGIC); | |
256 | ||
257 | usbhs_write(priv, BRDYSTS, 0); | |
258 | usbhs_write(priv, NRDYSTS, 0); | |
259 | usbhs_write(priv, BEMPSTS, 0); | |
260 | ||
261 | /* | |
262 | * call irq callback functions | |
263 | * see also | |
264 | * usbhs_irq_setting_update | |
265 | */ | |
89c1d2e7 KM |
266 | |
267 | /* INTSTS0 */ | |
b002ff6e KM |
268 | if (irq_state.intsts0 & VBINT) |
269 | usbhs_mod_info_call(priv, irq_vbus, priv, &irq_state); | |
270 | ||
f1407d5c KM |
271 | if (irq_state.intsts0 & DVST) |
272 | usbhs_mod_call(priv, irq_dev_state, priv, &irq_state); | |
273 | ||
274 | if (irq_state.intsts0 & CTRT) | |
275 | usbhs_mod_call(priv, irq_ctrl_stage, priv, &irq_state); | |
276 | ||
277 | if (irq_state.intsts0 & BEMP) | |
278 | usbhs_mod_call(priv, irq_empty, priv, &irq_state); | |
279 | ||
280 | if (irq_state.intsts0 & BRDY) | |
281 | usbhs_mod_call(priv, irq_ready, priv, &irq_state); | |
282 | ||
89c1d2e7 KM |
283 | /* INTSTS1 */ |
284 | if (irq_state.intsts1 & ATTCH) | |
285 | usbhs_mod_call(priv, irq_attch, priv, &irq_state); | |
286 | ||
287 | if (irq_state.intsts1 & DTCH) | |
288 | usbhs_mod_call(priv, irq_dtch, priv, &irq_state); | |
289 | ||
290 | if (irq_state.intsts1 & SIGN) | |
291 | usbhs_mod_call(priv, irq_sign, priv, &irq_state); | |
292 | ||
293 | if (irq_state.intsts1 & SACK) | |
294 | usbhs_mod_call(priv, irq_sack, priv, &irq_state); | |
295 | ||
f1407d5c KM |
296 | return IRQ_HANDLED; |
297 | } | |
298 | ||
299 | void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod) | |
300 | { | |
301 | u16 intenb0 = 0; | |
89c1d2e7 | 302 | u16 intenb1 = 0; |
b002ff6e | 303 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
f1407d5c | 304 | |
651f5e49 KM |
305 | /* |
306 | * BEMPENB/BRDYENB are picky. | |
307 | * below method is required | |
308 | * | |
309 | * - clear INTSTS0 | |
310 | * - update BEMPENB/BRDYENB | |
311 | * - update INTSTS0 | |
312 | */ | |
f1407d5c | 313 | usbhs_write(priv, INTENB0, 0); |
89c1d2e7 | 314 | usbhs_write(priv, INTENB1, 0); |
f1407d5c KM |
315 | |
316 | usbhs_write(priv, BEMPENB, 0); | |
317 | usbhs_write(priv, BRDYENB, 0); | |
318 | ||
319 | /* | |
320 | * see also | |
321 | * usbhs_interrupt | |
322 | */ | |
323 | ||
324 | /* | |
325 | * it don't enable DVSE (intenb0) here | |
326 | * but "mod->irq_dev_state" will be called. | |
327 | */ | |
b002ff6e KM |
328 | if (info->irq_vbus) |
329 | intenb0 |= VBSE; | |
f1407d5c | 330 | |
5ea68d54 | 331 | if (mod) { |
89c1d2e7 KM |
332 | /* |
333 | * INTSTS0 | |
334 | */ | |
5ea68d54 KM |
335 | if (mod->irq_ctrl_stage) |
336 | intenb0 |= CTRE; | |
f1407d5c | 337 | |
5ea68d54 KM |
338 | if (mod->irq_empty && mod->irq_bempsts) { |
339 | usbhs_write(priv, BEMPENB, mod->irq_bempsts); | |
340 | intenb0 |= BEMPE; | |
341 | } | |
f1407d5c | 342 | |
5ea68d54 KM |
343 | if (mod->irq_ready && mod->irq_brdysts) { |
344 | usbhs_write(priv, BRDYENB, mod->irq_brdysts); | |
345 | intenb0 |= BRDYE; | |
346 | } | |
89c1d2e7 KM |
347 | |
348 | /* | |
349 | * INTSTS1 | |
350 | */ | |
351 | if (mod->irq_attch) | |
352 | intenb1 |= ATTCHE; | |
353 | ||
b95eb747 | 354 | if (mod->irq_dtch) |
89c1d2e7 KM |
355 | intenb1 |= DTCHE; |
356 | ||
357 | if (mod->irq_sign) | |
358 | intenb1 |= SIGNE; | |
359 | ||
360 | if (mod->irq_sack) | |
361 | intenb1 |= SACKE; | |
f1407d5c KM |
362 | } |
363 | ||
651f5e49 KM |
364 | if (intenb0) |
365 | usbhs_write(priv, INTENB0, intenb0); | |
89c1d2e7 KM |
366 | |
367 | if (intenb1) | |
368 | usbhs_write(priv, INTENB1, intenb1); | |
f1407d5c | 369 | } |