1 files changed, 143 insertions, 0 deletions
diff --git a/drivers/staging/westbridge/astoria/api/src/cyasintr.c b/drivers/staging/westbridge/astoria/api/src/cyasintr.c
new file mode 100644
index 0000000..b60f69c
--- /dev/null
+++ b/drivers/staging/westbridge/astoria/api/src/cyasintr.c
@@ -0,0 +1,143 @@
+/* Cypress West Bridge API source file (cyasintr.c)
+## ===========================
+## Copyright (C) 2010  Cypress Semiconductor
+##
+## This program is free software; you can redistribute it and/or
+## modify it under the terms of the GNU General Public License
+## as published by the Free Software Foundation; either version 2
+## of the License, or (at your option) any later version.
+##
+## 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 Street, Fifth Floor
+## Boston, MA  02110-1301, USA.
+## ===========================
+*/
+
+#include "../../include/linux/westbridge/cyashal.h"
+#include "../../include/linux/westbridge/cyasdevice.h"
+#include "../../include/linux/westbridge/cyasregs.h"
+#include "../../include/linux/westbridge/cyaserr.h"
+
+extern void cy_as_mail_box_interrupt_handler(cy_as_device *);
+
+void
+cy_as_mcu_interrupt_handler(cy_as_device *dev_p)
+{
+	/* Read and clear the interrupt. */
+	uint16_t v;
+
+	v = cy_as_hal_read_register(dev_p->tag, CY_AS_MEM_P0_MCU_STAT);
+	v = v;
+}
+
+void
+cy_as_power_management_interrupt_handler(cy_as_device *dev_p)
+{
+	uint16_t v;
+
+	v = cy_as_hal_read_register(dev_p->tag, CY_AS_MEM_PWR_MAGT_STAT);
+	v = v;
+}
+
+void
+cy_as_pll_lock_loss_interrupt_handler(cy_as_device *dev_p)
+{
+	uint16_t v;
+
+	v = cy_as_hal_read_register(dev_p->tag, CY_AS_MEM_PLL_LOCK_LOSS_STAT);
+	v = v;
+}
+
+uint32_t cy_as_intr_start(cy_as_device *dev_p, cy_bool dmaintr)
+{
+	uint16_t v;
+
+	cy_as_hal_assert(dev_p->sig == CY_AS_DEVICE_HANDLE_SIGNATURE);
+
+	if (cy_as_device_is_intr_running(dev_p) != 0)
+		return CY_AS_ERROR_ALREADY_RUNNING;
+
+	v = CY_AS_MEM_P0_INT_MASK_REG_MMCUINT |
+		CY_AS_MEM_P0_INT_MASK_REG_MMBINT |
+		CY_AS_MEM_P0_INT_MASK_REG_MPMINT;
+
+	if (dmaintr)
+		v |= CY_AS_MEM_P0_INT_MASK_REG_MDRQINT;
+
+	/* Enable the interrupts of interest */
+	cy_as_hal_write_register(dev_p->tag, CY_AS_MEM_P0_INT_MASK_REG, v);
+
+	/* Mark the interrupt module as initialized */
+	cy_as_device_set_intr_running(dev_p);
+
+	return CY_AS_ERROR_SUCCESS;
+}
+
+uint32_t cy_as_intr_stop(cy_as_device *dev_p)
+{
+	cy_as_hal_assert(dev_p->sig == CY_AS_DEVICE_HANDLE_SIGNATURE);
+
+	if (cy_as_device_is_intr_running(dev_p) == 0)
+		return CY_AS_ERROR_NOT_RUNNING;
+
+	cy_as_hal_write_register(dev_p->tag, CY_AS_MEM_P0_INT_MASK_REG, 0);
+	cy_as_device_set_intr_stopped(dev_p);
+
+	return CY_AS_ERROR_SUCCESS;
+}
+
+void cy_as_intr_service_interrupt(cy_as_hal_device_tag tag)
+{
+	uint16_t v;
+	cy_as_device *dev_p;
+
+	dev_p = cy_as_device_find_from_tag(tag);
+
+	/*
+	 * only power management interrupts can occur before the
+	 * antioch API setup is complete. if this is a PM interrupt
+	 *  handle it here; otherwise output a warning message.
+	 */
+	if (dev_p == 0) {
+		v = cy_as_hal_read_register(tag, CY_AS_MEM_P0_INTR_REG);
+		if (v == CY_AS_MEM_P0_INTR_REG_PMINT) {
+			/* Read the PWR_MAGT_STAT register
+			 * to clear this interrupt. */
+			v = cy_as_hal_read_register(tag,
+				CY_AS_MEM_PWR_MAGT_STAT);
+		} else
+			cy_as_hal_print_message("stray antioch "
+				"interrupt detected"
+				", tag not associated "
+				"with any created device.");
+		return;
+	}
+
+	/* Make sure we got a valid object from CyAsDeviceFindFromTag */
+	cy_as_hal_assert(dev_p->sig == CY_AS_DEVICE_HANDLE_SIGNATURE);
+
+	v = cy_as_hal_read_register(dev_p->tag, CY_AS_MEM_P0_INTR_REG);
+
+	if (v & CY_AS_MEM_P0_INTR_REG_MCUINT)
+		cy_as_mcu_interrupt_handler(dev_p);
+
+	if (v & CY_AS_MEM_P0_INTR_REG_PMINT)
+		cy_as_power_management_interrupt_handler(dev_p);
+
+	if (v & CY_AS_MEM_P0_INTR_REG_PLLLOCKINT)
+		cy_as_pll_lock_loss_interrupt_handler(dev_p);
+
+	/* If the interrupt module is not running, no mailbox
+	 * interrupts are expected from the west bridge. */
+	if (cy_as_device_is_intr_running(dev_p) == 0)
+		return;
+
+	if (v & CY_AS_MEM_P0_INTR_REG_MBINT)
+		cy_as_mail_box_interrupt_handler(dev_p);
+}