4 * Copyright (C) 2011 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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.
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
17 #include <linux/interrupt.h>
22 #define usbhs_priv_to_modinfo(priv) (&priv->mod_info)
23 #define usbhs_mod_info_call(priv, func, param...) \
25 struct usbhs_mod_info *info; \
26 info = usbhs_priv_to_modinfo(priv); \
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 * ~~~~~~~~~~~~~~~~~~~~~~~~~
41 static int usbhsm_autonomy_get_vbus(struct platform_device *pdev)
43 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
45 return VBSTS & usbhs_read(priv, INTSTS0);
48 static int usbhsm_autonomy_irq_vbus(struct usbhs_priv *priv,
49 struct usbhs_irq_state *irq_state)
51 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
53 renesas_usbhs_call_notify_hotplug(pdev);
58 void usbhs_mod_autonomy_mode(struct usbhs_priv *priv)
60 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
62 info->irq_vbus = usbhsm_autonomy_irq_vbus;
63 priv->pfunc.get_vbus = usbhsm_autonomy_get_vbus;
65 usbhs_irq_callback_update(priv, NULL);
69 * host / gadget functions
71 * renesas_usbhs host/gadget can register itself by below functions.
72 * these functions are called when probe
75 void usbhs_mod_register(struct usbhs_priv *priv, struct usbhs_mod *mod, int id)
77 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
83 struct usbhs_mod *usbhs_mod_get(struct usbhs_priv *priv, int id)
85 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
86 struct usbhs_mod *ret = NULL;
98 int usbhs_mod_is_host(struct usbhs_priv *priv)
100 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
101 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
106 return info->mod[USBHS_HOST] == mod;
109 struct usbhs_mod *usbhs_mod_get_current(struct usbhs_priv *priv)
111 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
116 int usbhs_mod_change(struct usbhs_priv *priv, int id)
118 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
119 struct usbhs_mod *mod = NULL;
122 /* id < 0 mean no current */
136 static irqreturn_t usbhs_interrupt(int irq, void *data);
137 int usbhs_mod_probe(struct usbhs_priv *priv)
139 struct device *dev = usbhs_priv_to_dev(priv);
143 * install host/gadget driver
145 ret = usbhs_mod_host_probe(priv);
149 ret = usbhs_mod_gadget_probe(priv);
151 goto mod_init_host_err;
154 ret = devm_request_irq(dev, priv->irq, usbhs_interrupt,
155 priv->irqflags, dev_name(dev), priv);
157 dev_err(dev, "irq request err\n");
158 goto mod_init_gadget_err;
164 usbhs_mod_gadget_remove(priv);
166 usbhs_mod_host_remove(priv);
171 void usbhs_mod_remove(struct usbhs_priv *priv)
173 usbhs_mod_host_remove(priv);
174 usbhs_mod_gadget_remove(priv);
180 int usbhs_status_get_device_state(struct usbhs_irq_state *irq_state)
182 int state = irq_state->intsts0 & DVSQ_MASK;
188 case CONFIGURATION_STATE:
195 int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state)
205 * NODATA_STATUS_STAGE
208 return (int)irq_state->intsts0 & CTSQ_MASK;
211 static int usbhs_status_get_each_irq(struct usbhs_priv *priv,
212 struct usbhs_irq_state *state)
214 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
215 u16 intenb0, intenb1;
218 /******************** spin lock ********************/
219 usbhs_lock(priv, flags);
220 state->intsts0 = usbhs_read(priv, INTSTS0);
221 intenb0 = usbhs_read(priv, INTENB0);
223 if (usbhs_mod_is_host(priv)) {
224 state->intsts1 = usbhs_read(priv, INTSTS1);
225 intenb1 = usbhs_read(priv, INTENB1);
227 state->intsts1 = intenb1 = 0;
232 state->brdysts = usbhs_read(priv, BRDYSTS);
233 state->nrdysts = usbhs_read(priv, NRDYSTS);
234 state->bempsts = usbhs_read(priv, BEMPSTS);
236 state->bempsts &= mod->irq_bempsts;
237 state->brdysts &= mod->irq_brdysts;
239 usbhs_unlock(priv, flags);
240 /******************** spin unlock ******************/
243 * Check whether the irq enable registers and the irq status are set
244 * when IRQF_SHARED is set.
246 if (priv->irqflags & IRQF_SHARED) {
247 if (!(intenb0 & state->intsts0) &&
248 !(intenb1 & state->intsts1) &&
260 #define INTSTS0_MAGIC 0xF800 /* acknowledge magical interrupt sources */
261 #define INTSTS1_MAGIC 0xA870 /* acknowledge magical interrupt sources */
262 static irqreturn_t usbhs_interrupt(int irq, void *data)
264 struct usbhs_priv *priv = data;
265 struct usbhs_irq_state irq_state;
267 if (usbhs_status_get_each_irq(priv, &irq_state) < 0)
273 * The hardware is _very_ picky to clear interrupt bit.
274 * Especially INTSTS0_MAGIC, INTSTS1_MAGIC value.
278 * - "Control Transfer (DCP)"
279 * - Function :: VALID bit should 0
281 usbhs_write(priv, INTSTS0, ~irq_state.intsts0 & INTSTS0_MAGIC);
282 if (usbhs_mod_is_host(priv))
283 usbhs_write(priv, INTSTS1, ~irq_state.intsts1 & INTSTS1_MAGIC);
285 usbhs_write(priv, BRDYSTS, ~irq_state.brdysts);
286 usbhs_write(priv, NRDYSTS, ~irq_state.nrdysts);
287 usbhs_write(priv, BEMPSTS, ~irq_state.bempsts);
290 * call irq callback functions
292 * usbhs_irq_setting_update
296 if (irq_state.intsts0 & VBINT)
297 usbhs_mod_info_call(priv, irq_vbus, priv, &irq_state);
299 if (irq_state.intsts0 & DVST)
300 usbhs_mod_call(priv, irq_dev_state, priv, &irq_state);
302 if (irq_state.intsts0 & CTRT)
303 usbhs_mod_call(priv, irq_ctrl_stage, priv, &irq_state);
305 if (irq_state.intsts0 & BEMP)
306 usbhs_mod_call(priv, irq_empty, priv, &irq_state);
308 if (irq_state.intsts0 & BRDY)
309 usbhs_mod_call(priv, irq_ready, priv, &irq_state);
311 if (usbhs_mod_is_host(priv)) {
313 if (irq_state.intsts1 & ATTCH)
314 usbhs_mod_call(priv, irq_attch, priv, &irq_state);
316 if (irq_state.intsts1 & DTCH)
317 usbhs_mod_call(priv, irq_dtch, priv, &irq_state);
319 if (irq_state.intsts1 & SIGN)
320 usbhs_mod_call(priv, irq_sign, priv, &irq_state);
322 if (irq_state.intsts1 & SACK)
323 usbhs_mod_call(priv, irq_sack, priv, &irq_state);
328 void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod)
332 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
335 * BEMPENB/BRDYENB are picky.
336 * below method is required
339 * - update BEMPENB/BRDYENB
342 usbhs_write(priv, INTENB0, 0);
343 if (usbhs_mod_is_host(priv))
344 usbhs_write(priv, INTENB1, 0);
346 usbhs_write(priv, BEMPENB, 0);
347 usbhs_write(priv, BRDYENB, 0);
355 * it don't enable DVSE (intenb0) here
356 * but "mod->irq_dev_state" will be called.
365 if (mod->irq_ctrl_stage)
368 if (mod->irq_empty && mod->irq_bempsts) {
369 usbhs_write(priv, BEMPENB, mod->irq_bempsts);
373 if (mod->irq_ready && mod->irq_brdysts) {
374 usbhs_write(priv, BRDYENB, mod->irq_brdysts);
378 if (usbhs_mod_is_host(priv)) {
397 usbhs_write(priv, INTENB0, intenb0);
399 if (usbhs_mod_is_host(priv) && intenb1)
400 usbhs_write(priv, INTENB1, intenb1);