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 return usbhsc_drvcllbck_notify_hotplug(pdev);
56 void usbhs_mod_autonomy_mode(struct usbhs_priv *priv)
58 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
60 info->irq_vbus = usbhsm_autonomy_irq_vbus;
61 priv->pfunc->get_vbus = usbhsm_autonomy_get_vbus;
63 usbhs_irq_callback_update(priv, NULL);
67 * host / gadget functions
69 * renesas_usbhs host/gadget can register itself by below functions.
70 * these functions are called when probe
73 void usbhs_mod_register(struct usbhs_priv *priv, struct usbhs_mod *mod, int id)
75 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
81 struct usbhs_mod *usbhs_mod_get(struct usbhs_priv *priv, int id)
83 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
84 struct usbhs_mod *ret = NULL;
96 int usbhs_mod_is_host(struct usbhs_priv *priv, struct usbhs_mod *mod)
98 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
103 return info->mod[USBHS_HOST] == mod;
106 struct usbhs_mod *usbhs_mod_get_current(struct usbhs_priv *priv)
108 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
113 int usbhs_mod_change(struct usbhs_priv *priv, int id)
115 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
116 struct usbhs_mod *mod = NULL;
119 /* id < 0 mean no current */
133 static irqreturn_t usbhs_interrupt(int irq, void *data);
134 int usbhs_mod_probe(struct usbhs_priv *priv)
136 struct device *dev = usbhs_priv_to_dev(priv);
140 * install host/gadget driver
142 ret = usbhs_mod_gadget_probe(priv);
147 ret = request_irq(priv->irq, usbhs_interrupt,
148 IRQF_DISABLED, dev_name(dev), priv);
150 dev_err(dev, "irq request err\n");
151 goto mod_init_gadget_err;
157 usbhs_mod_gadget_remove(priv);
162 void usbhs_mod_remove(struct usbhs_priv *priv)
164 usbhs_mod_gadget_remove(priv);
165 free_irq(priv->irq, priv);
171 int usbhs_status_get_usb_speed(struct usbhs_irq_state *irq_state)
173 switch (irq_state->dvstctr & RHST) {
175 return USB_SPEED_LOW;
176 case RHST_FULL_SPEED:
177 return USB_SPEED_FULL;
178 case RHST_HIGH_SPEED:
179 return USB_SPEED_HIGH;
182 return USB_SPEED_UNKNOWN;
185 int usbhs_status_get_device_state(struct usbhs_irq_state *irq_state)
187 int state = irq_state->intsts0 & DVSQ_MASK;
193 case CONFIGURATION_STATE:
200 int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state)
210 * NODATA_STATUS_STAGE
213 return (int)irq_state->intsts0 & CTSQ_MASK;
216 static void usbhs_status_get_each_irq(struct usbhs_priv *priv,
217 struct usbhs_irq_state *state)
219 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
221 state->intsts0 = usbhs_read(priv, INTSTS0);
222 state->intsts1 = usbhs_read(priv, INTSTS1);
224 state->dvstctr = usbhs_read(priv, DVSTCTR);
228 state->brdysts = usbhs_read(priv, BRDYSTS);
229 state->nrdysts = usbhs_read(priv, NRDYSTS);
230 state->bempsts = usbhs_read(priv, BEMPSTS);
232 state->bempsts &= mod->irq_bempsts;
233 state->brdysts &= mod->irq_brdysts;
240 #define INTSTS0_MAGIC 0xF800 /* acknowledge magical interrupt sources */
241 #define INTSTS1_MAGIC 0xA870 /* acknowledge magical interrupt sources */
242 static irqreturn_t usbhs_interrupt(int irq, void *data)
244 struct usbhs_priv *priv = data;
245 struct usbhs_irq_state irq_state;
247 usbhs_status_get_each_irq(priv, &irq_state);
252 * The hardware is _very_ picky to clear interrupt bit.
253 * Especially INTSTS0_MAGIC, INTSTS1_MAGIC value.
257 * - "Control Transfer (DCP)"
258 * - Function :: VALID bit should 0
260 usbhs_write(priv, INTSTS0, ~irq_state.intsts0 & INTSTS0_MAGIC);
261 usbhs_write(priv, INTSTS1, ~irq_state.intsts1 & INTSTS1_MAGIC);
263 usbhs_write(priv, BRDYSTS, 0);
264 usbhs_write(priv, NRDYSTS, 0);
265 usbhs_write(priv, BEMPSTS, 0);
268 * call irq callback functions
270 * usbhs_irq_setting_update
272 if (irq_state.intsts0 & VBINT)
273 usbhs_mod_info_call(priv, irq_vbus, priv, &irq_state);
275 if (irq_state.intsts0 & DVST)
276 usbhs_mod_call(priv, irq_dev_state, priv, &irq_state);
278 if (irq_state.intsts0 & CTRT)
279 usbhs_mod_call(priv, irq_ctrl_stage, priv, &irq_state);
281 if (irq_state.intsts0 & BEMP)
282 usbhs_mod_call(priv, irq_empty, priv, &irq_state);
284 if (irq_state.intsts0 & BRDY)
285 usbhs_mod_call(priv, irq_ready, priv, &irq_state);
290 void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod)
293 struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
295 usbhs_write(priv, INTENB0, 0);
297 usbhs_write(priv, BEMPENB, 0);
298 usbhs_write(priv, BRDYENB, 0);
306 * it don't enable DVSE (intenb0) here
307 * but "mod->irq_dev_state" will be called.
313 if (mod->irq_ctrl_stage)
316 if (mod->irq_empty && mod->irq_bempsts) {
317 usbhs_write(priv, BEMPENB, mod->irq_bempsts);
321 if (mod->irq_ready && mod->irq_brdysts) {
322 usbhs_write(priv, BRDYENB, mod->irq_brdysts);
327 usbhs_write(priv, INTENB0, intenb0);