--- /dev/null
+/*
+ * Renesas USB driver
+ *
+ * Copyright (C) 2011 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+#include <linux/interrupt.h>
+
+#include "common.h"
+#include "mod.h"
+
+#define usbhs_priv_to_modinfo(priv) (&priv->mod_info)
+#define usbhs_mod_info_call(priv, func, param...) \
+({ \
+ struct usbhs_mod_info *info; \
+ info = usbhs_priv_to_modinfo(priv); \
+ !info->func ? 0 : \
+ info->func(param); \
+})
+
+/*
+ * autonomy
+ *
+ * these functions are used if platform doesn't have external phy.
+ * -> there is no "notify_hotplug" callback from platform
+ * -> call "notify_hotplug" by itself
+ * -> use own interrupt to connect/disconnect
+ * -> it mean module clock is always ON
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+static int usbhsm_autonomy_get_vbus(struct platform_device *pdev)
+{
+ struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+
+ return VBSTS & usbhs_read(priv, INTSTS0);
+}
+
+static int usbhsm_autonomy_irq_vbus(struct usbhs_priv *priv,
+ struct usbhs_irq_state *irq_state)
+{
+ struct platform_device *pdev = usbhs_priv_to_pdev(priv);
+
+ renesas_usbhs_call_notify_hotplug(pdev);
+
+ return 0;
+}
+
+void usbhs_mod_autonomy_mode(struct usbhs_priv *priv)
+{
+ struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
+
+ info->irq_vbus = usbhsm_autonomy_irq_vbus;
+ priv->pfunc.get_vbus = usbhsm_autonomy_get_vbus;
+
+ usbhs_irq_callback_update(priv, NULL);
+}
+
+/*
+ * host / gadget functions
+ *
+ * renesas_usbhs host/gadget can register itself by below functions.
+ * these functions are called when probe
+ *
+ */
+void usbhs_mod_register(struct usbhs_priv *priv, struct usbhs_mod *mod, int id)
+{
+ struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
+
+ info->mod[id] = mod;
+ mod->priv = priv;
+}
+
+struct usbhs_mod *usbhs_mod_get(struct usbhs_priv *priv, int id)
+{
+ struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
+ struct usbhs_mod *ret = NULL;
+
+ switch (id) {
+ case USBHS_HOST:
+ case USBHS_GADGET:
+ ret = info->mod[id];
+ break;
+ }
+
+ return ret;
+}
+
+int usbhs_mod_is_host(struct usbhs_priv *priv)
+{
+ struct usbhs_mod *mod = usbhs_mod_get_current(priv);
+ struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
+
+ if (!mod)
+ return -EINVAL;
+
+ return info->mod[USBHS_HOST] == mod;
+}
+
+struct usbhs_mod *usbhs_mod_get_current(struct usbhs_priv *priv)
+{
+ struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
+
+ return info->curt;
+}
+
+int usbhs_mod_change(struct usbhs_priv *priv, int id)
+{
+ struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
+ struct usbhs_mod *mod = NULL;
+ int ret = 0;
+
+ /* id < 0 mean no current */
+ switch (id) {
+ case USBHS_HOST:
+ case USBHS_GADGET:
+ mod = info->mod[id];
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ info->curt = mod;
+
+ return ret;
+}
+
+static irqreturn_t usbhs_interrupt(int irq, void *data);
+int usbhs_mod_probe(struct usbhs_priv *priv)
+{
+ struct device *dev = usbhs_priv_to_dev(priv);
+ int ret;
+
+ /*
+ * install host/gadget driver
+ */
+ ret = usbhs_mod_host_probe(priv);
+ if (ret < 0)
+ return ret;
+
+ ret = usbhs_mod_gadget_probe(priv);
+ if (ret < 0)
+ goto mod_init_host_err;
+
+ /* irq settings */
+ ret = devm_request_irq(dev, priv->irq, usbhs_interrupt,
+ priv->irqflags, dev_name(dev), priv);
+ if (ret) {
+ dev_err(dev, "irq request err\n");
+ goto mod_init_gadget_err;
+ }
+
+ return ret;
+
+mod_init_gadget_err:
+ usbhs_mod_gadget_remove(priv);
+mod_init_host_err:
+ usbhs_mod_host_remove(priv);
+
+ return ret;
+}
+
+void usbhs_mod_remove(struct usbhs_priv *priv)
+{
+ usbhs_mod_host_remove(priv);
+ usbhs_mod_gadget_remove(priv);
+}
+
+/*
+ * status functions
+ */
+int usbhs_status_get_device_state(struct usbhs_irq_state *irq_state)
+{
+ int state = irq_state->intsts0 & DVSQ_MASK;
+
+ switch (state) {
+ case POWER_STATE:
+ case DEFAULT_STATE:
+ case ADDRESS_STATE:
+ case CONFIGURATION_STATE:
+ return state;
+ }
+
+ return -EIO;
+}
+
+int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state)
+{
+ /*
+ * return value
+ *
+ * IDLE_SETUP_STAGE
+ * READ_DATA_STAGE
+ * READ_STATUS_STAGE
+ * WRITE_DATA_STAGE
+ * WRITE_STATUS_STAGE
+ * NODATA_STATUS_STAGE
+ * SEQUENCE_ERROR
+ */
+ return (int)irq_state->intsts0 & CTSQ_MASK;
+}
+
+static int usbhs_status_get_each_irq(struct usbhs_priv *priv,
+ struct usbhs_irq_state *state)
+{
+ struct usbhs_mod *mod = usbhs_mod_get_current(priv);
+ u16 intenb0, intenb1;
+ unsigned long flags;
+
+ /******************** spin lock ********************/
+ usbhs_lock(priv, flags);
+ state->intsts0 = usbhs_read(priv, INTSTS0);
+ state->intsts1 = usbhs_read(priv, INTSTS1);
+
+ intenb0 = usbhs_read(priv, INTENB0);
+ intenb1 = usbhs_read(priv, INTENB1);
+
+ /* mask */
+ if (mod) {
+ state->brdysts = usbhs_read(priv, BRDYSTS);
+ state->nrdysts = usbhs_read(priv, NRDYSTS);
+ state->bempsts = usbhs_read(priv, BEMPSTS);
+
+ state->bempsts &= mod->irq_bempsts;
+ state->brdysts &= mod->irq_brdysts;
+ }
+ usbhs_unlock(priv, flags);
+ /******************** spin unlock ******************/
+
+ /*
+ * Check whether the irq enable registers and the irq status are set
+ * when IRQF_SHARED is set.
+ */
+ if (priv->irqflags & IRQF_SHARED) {
+ if (!(intenb0 & state->intsts0) &&
+ !(intenb1 & state->intsts1) &&
+ !(state->bempsts) &&
+ !(state->brdysts))
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/*
+ * interrupt
+ */
+#define INTSTS0_MAGIC 0xF800 /* acknowledge magical interrupt sources */
+#define INTSTS1_MAGIC 0xA870 /* acknowledge magical interrupt sources */
+static irqreturn_t usbhs_interrupt(int irq, void *data)
+{
+ struct usbhs_priv *priv = data;
+ struct usbhs_irq_state irq_state;
+
+ if (usbhs_status_get_each_irq(priv, &irq_state) < 0)
+ return IRQ_NONE;
+
+ /*
+ * clear interrupt
+ *
+ * The hardware is _very_ picky to clear interrupt bit.
+ * Especially INTSTS0_MAGIC, INTSTS1_MAGIC value.
+ *
+ * see
+ * "Operation"
+ * - "Control Transfer (DCP)"
+ * - Function :: VALID bit should 0
+ */
+ usbhs_write(priv, INTSTS0, ~irq_state.intsts0 & INTSTS0_MAGIC);
+ usbhs_write(priv, INTSTS1, ~irq_state.intsts1 & INTSTS1_MAGIC);
+
+ usbhs_write(priv, BRDYSTS, ~irq_state.brdysts);
+ usbhs_write(priv, NRDYSTS, ~irq_state.nrdysts);
+ usbhs_write(priv, BEMPSTS, ~irq_state.bempsts);
+
+ /*
+ * call irq callback functions
+ * see also
+ * usbhs_irq_setting_update
+ */
+
+ /* INTSTS0 */
+ if (irq_state.intsts0 & VBINT)
+ usbhs_mod_info_call(priv, irq_vbus, priv, &irq_state);
+
+ if (irq_state.intsts0 & DVST)
+ usbhs_mod_call(priv, irq_dev_state, priv, &irq_state);
+
+ if (irq_state.intsts0 & CTRT)
+ usbhs_mod_call(priv, irq_ctrl_stage, priv, &irq_state);
+
+ if (irq_state.intsts0 & BEMP)
+ usbhs_mod_call(priv, irq_empty, priv, &irq_state);
+
+ if (irq_state.intsts0 & BRDY)
+ usbhs_mod_call(priv, irq_ready, priv, &irq_state);
+
+ /* INTSTS1 */
+ if (irq_state.intsts1 & ATTCH)
+ usbhs_mod_call(priv, irq_attch, priv, &irq_state);
+
+ if (irq_state.intsts1 & DTCH)
+ usbhs_mod_call(priv, irq_dtch, priv, &irq_state);
+
+ if (irq_state.intsts1 & SIGN)
+ usbhs_mod_call(priv, irq_sign, priv, &irq_state);
+
+ if (irq_state.intsts1 & SACK)
+ usbhs_mod_call(priv, irq_sack, priv, &irq_state);
+
+ return IRQ_HANDLED;
+}
+
+void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod)
+{
+ u16 intenb0 = 0;
+ u16 intenb1 = 0;
+ struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
+
+ /*
+ * BEMPENB/BRDYENB are picky.
+ * below method is required
+ *
+ * - clear INTSTS0
+ * - update BEMPENB/BRDYENB
+ * - update INTSTS0
+ */
+ usbhs_write(priv, INTENB0, 0);
+ usbhs_write(priv, INTENB1, 0);
+
+ usbhs_write(priv, BEMPENB, 0);
+ usbhs_write(priv, BRDYENB, 0);
+
+ /*
+ * see also
+ * usbhs_interrupt
+ */
+
+ /*
+ * it don't enable DVSE (intenb0) here
+ * but "mod->irq_dev_state" will be called.
+ */
+ if (info->irq_vbus)
+ intenb0 |= VBSE;
+
+ if (mod) {
+ /*
+ * INTSTS0
+ */
+ if (mod->irq_ctrl_stage)
+ intenb0 |= CTRE;
+
+ if (mod->irq_empty && mod->irq_bempsts) {
+ usbhs_write(priv, BEMPENB, mod->irq_bempsts);
+ intenb0 |= BEMPE;
+ }
+
+ if (mod->irq_ready && mod->irq_brdysts) {
+ usbhs_write(priv, BRDYENB, mod->irq_brdysts);
+ intenb0 |= BRDYE;
+ }
+
+ /*
+ * INTSTS1
+ */
+ if (mod->irq_attch)
+ intenb1 |= ATTCHE;
+
+ if (mod->irq_dtch)
+ intenb1 |= DTCHE;
+
+ if (mod->irq_sign)
+ intenb1 |= SIGNE;
+
+ if (mod->irq_sack)
+ intenb1 |= SACKE;
+ }
+
+ if (intenb0)
+ usbhs_write(priv, INTENB0, intenb0);
+
+ if (intenb1)
+ usbhs_write(priv, INTENB1, intenb1);
+}
Code Review / kvmfornfv.git / blobdiff