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 = request_irq(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);
175 free_irq(priv->irq, priv);
181 int usbhs_status_get_device_state(struct usbhs_irq_state *irq_state)
183 int state = irq_state->intsts0 & DVSQ_MASK;
189 case CONFIGURATION_STATE:
196 int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state)
206 * NODATA_STATUS_STAGE
209 return (int)irq_state->intsts0 & CTSQ_MASK;
212 static int usbhs_status_get_each_irq(struct usbhs_priv *priv,
213 struct usbhs_irq_state *state)
215 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
216 u16 intenb0, intenb1;
218 state->intsts0 = usbhs_read(priv, INTSTS0);
219 state->intsts1 = usbhs_read(priv, INTSTS1);
221 intenb0 = usbhs_read(priv, INTENB0);
222 intenb1 = usbhs_read(priv, INTENB1);
226 state->brdysts = usbhs_read(priv, BRDYSTS);
227 state->nrdysts = usbhs_read(priv, NRDYSTS);
228 state->bempsts = usbhs_read(priv, BEMPSTS);
230 state->bempsts &= mod->irq_bempsts;
231 state->brdysts &= mod->irq_brdysts;
235 * Check whether the irq enable registers and the irq status are set
236 * when IRQF_SHARED is set.
238 if (priv->irqflags & IRQF_SHARED) {
239 if (!(intenb0 & state->intsts0) &&
240 !(intenb1 & state->intsts1) &&
252 #define INTSTS0_MAGIC 0xF800 /* acknowledge magical interrupt sources */
253 #define INTSTS1_MAGIC 0xA870 /* acknowledge magical interrupt sources */
254 static irqreturn_t usbhs_interrupt(int irq, void *data)
256 struct usbhs_priv *priv = data;
257 struct usbhs_irq_state irq_state;
259 if (usbhs_status_get_each_irq(priv, &irq_state) < 0)
265 * The hardware is _very_ picky to clear interrupt bit.
266 * Especially INTSTS0_MAGIC, INTSTS1_MAGIC value.
270 * - "Control Transfer (DCP)"
271 * - Function :: VALID bit should 0
273 usbhs_write(priv, INTSTS0, ~irq_state.intsts0 & INTSTS0_MAGIC);
274 usbhs_write(priv, INTSTS1, ~irq_state.intsts1 & INTSTS1_MAGIC);
276 usbhs_write(priv, BRDYSTS, ~irq_state.brdysts);
277 usbhs_write(priv, NRDYSTS, ~irq_state.nrdysts);
278 usbhs_write(priv, BEMPSTS, ~irq_state.bempsts);
281 * call irq callback functions
283 * usbhs_irq_setting_update
287 if (irq_state.intsts0 & VBINT)
288 usbhs_mod_info_call(priv, irq_vbus, priv, &irq_state);
290 if (irq_state.intsts0 & DVST)
291 usbhs_mod_call(priv, irq_dev_state, priv, &irq_state);
293 if (irq_state.intsts0 & CTRT)
294 usbhs_mod_call(priv, irq_ctrl_stage, priv, &irq_state);
296 if (irq_state.intsts0 & BEMP)
297 usbhs_mod_call(priv, irq_empty, priv, &irq_state);
299 if (irq_state.intsts0 & BRDY)
300 usbhs_mod_call(priv, irq_ready, priv, &irq_state);
303 if (irq_state.intsts1 & ATTCH)
304 usbhs_mod_call(priv, irq_attch, priv, &irq_state);
306 if (irq_state.intsts1 & DTCH)
307 usbhs_mod_call(priv, irq_dtch, priv, &irq_state);
309 if (irq_state.intsts1 & SIGN)
310 usbhs_mod_call(priv, irq_sign, priv, &irq_state);
312 if (irq_state.intsts1 & SACK)
313 usbhs_mod_call(priv, irq_sack, priv, &irq_state);
318 void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod)
322 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
325 * BEMPENB/BRDYENB are picky.
326 * below method is required
329 * - update BEMPENB/BRDYENB
332 usbhs_write(priv, INTENB0, 0);
333 usbhs_write(priv, INTENB1, 0);
335 usbhs_write(priv, BEMPENB, 0);
336 usbhs_write(priv, BRDYENB, 0);
344 * it don't enable DVSE (intenb0) here
345 * but "mod->irq_dev_state" will be called.
354 if (mod->irq_ctrl_stage)
357 if (mod->irq_empty && mod->irq_bempsts) {
358 usbhs_write(priv, BEMPENB, mod->irq_bempsts);
362 if (mod->irq_ready && mod->irq_brdysts) {
363 usbhs_write(priv, BRDYENB, mod->irq_brdysts);
384 usbhs_write(priv, INTENB0, intenb0);
387 usbhs_write(priv, INTENB1, intenb1);