1 files changed, 448 insertions, 0 deletions
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/hive_isp_css_common/host/irq.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/hive_isp_css_common/host/irq.c
new file mode 100644
index 0000000..6b58bc1
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/hive_isp_css_common/host/irq.c
@@ -0,0 +1,448 @@
+/*
+ * Support for Intel Camera Imaging ISP subsystem.
+ * Copyright (c) 2010-2015, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ */
+
+#include "assert_support.h"
+#include "irq.h"
+
+#ifndef __INLINE_GP_DEVICE__
+#define __INLINE_GP_DEVICE__
+#endif
+#include "gp_device.h"	/* _REG_GP_IRQ_REQUEST_ADDR */
+
+#include "platform_support.h"			/* hrt_sleep() */
+
+STORAGE_CLASS_INLINE void irq_wait_for_write_complete(
+	const irq_ID_t		ID);
+
+STORAGE_CLASS_INLINE bool any_irq_channel_enabled(
+	const irq_ID_t				ID);
+
+STORAGE_CLASS_INLINE irq_ID_t virq_get_irq_id(
+	const virq_id_t		irq_ID,
+	unsigned int		*channel_ID);
+
+#ifndef __INLINE_IRQ__
+#include "irq_private.h"
+#endif /* __INLINE_IRQ__ */
+
+static unsigned short IRQ_N_CHANNEL[N_IRQ_ID] = {
+	IRQ0_ID_N_CHANNEL,
+	IRQ1_ID_N_CHANNEL,
+	IRQ2_ID_N_CHANNEL,
+	IRQ3_ID_N_CHANNEL};
+
+static unsigned short IRQ_N_ID_OFFSET[N_IRQ_ID + 1] = {
+	IRQ0_ID_OFFSET,
+	IRQ1_ID_OFFSET,
+	IRQ2_ID_OFFSET,
+	IRQ3_ID_OFFSET,
+	IRQ_END_OFFSET};
+
+static virq_id_t IRQ_NESTING_ID[N_IRQ_ID] = {
+	N_virq_id,
+	virq_ifmt,
+	virq_isys,
+	virq_isel};
+
+void irq_clear_all(
+	const irq_ID_t				ID)
+{
+	hrt_data	mask = 0xFFFFFFFF;
+
+	assert(ID < N_IRQ_ID);
+	assert(IRQ_N_CHANNEL[ID] <= HRT_DATA_WIDTH);
+
+	if (IRQ_N_CHANNEL[ID] < HRT_DATA_WIDTH) {
+		mask = ~((~(hrt_data)0)>>IRQ_N_CHANNEL[ID]);
+	}
+
+	irq_reg_store(ID,
+		_HRT_IRQ_CONTROLLER_CLEAR_REG_IDX, mask);
+return;
+}
+
+/*
+ * Do we want the user to be able to set the signalling method ?
+ */
+void irq_enable_channel(
+	const irq_ID_t				ID,
+    const unsigned int			irq_id)
+{
+	unsigned int mask = irq_reg_load(ID,
+		_HRT_IRQ_CONTROLLER_MASK_REG_IDX);
+	unsigned int enable = irq_reg_load(ID,
+		_HRT_IRQ_CONTROLLER_ENABLE_REG_IDX);
+	unsigned int edge_in = irq_reg_load(ID,
+		_HRT_IRQ_CONTROLLER_EDGE_REG_IDX);
+	unsigned int me = 1U << irq_id;
+
+	assert(ID < N_IRQ_ID);
+	assert(irq_id < IRQ_N_CHANNEL[ID]);
+
+	mask |= me;
+	enable |= me;
+	edge_in |= me;	/* rising edge */
+
+/* to avoid mishaps configuration must follow the following order */
+
+/* mask this interrupt */
+	irq_reg_store(ID,
+		_HRT_IRQ_CONTROLLER_MASK_REG_IDX, mask & ~me);
+/* rising edge at input */
+	irq_reg_store(ID,
+		_HRT_IRQ_CONTROLLER_EDGE_REG_IDX, edge_in);
+/* enable interrupt to output */
+	irq_reg_store(ID,
+		_HRT_IRQ_CONTROLLER_ENABLE_REG_IDX, enable);
+/* clear current irq only */
+	irq_reg_store(ID,
+		_HRT_IRQ_CONTROLLER_CLEAR_REG_IDX, me);
+/* unmask interrupt from input */
+	irq_reg_store(ID,
+		_HRT_IRQ_CONTROLLER_MASK_REG_IDX, mask);
+
+	irq_wait_for_write_complete(ID);
+
+return;
+}
+
+void irq_enable_pulse(
+	const irq_ID_t	ID,
+	bool 			pulse)
+{
+	unsigned int edge_out = 0x0;
+
+	if (pulse) {
+		edge_out = 0xffffffff;
+	}
+	/* output is given as edge, not pulse */
+	irq_reg_store(ID,
+		_HRT_IRQ_CONTROLLER_EDGE_NOT_PULSE_REG_IDX, edge_out);
+return;
+}
+
+void irq_disable_channel(
+	const irq_ID_t				ID,
+	const unsigned int			irq_id)
+{
+	unsigned int mask = irq_reg_load(ID,
+		_HRT_IRQ_CONTROLLER_MASK_REG_IDX);
+	unsigned int enable = irq_reg_load(ID,
+		_HRT_IRQ_CONTROLLER_ENABLE_REG_IDX);
+	unsigned int me = 1U << irq_id;
+
+	assert(ID < N_IRQ_ID);
+	assert(irq_id < IRQ_N_CHANNEL[ID]);
+
+	mask &= ~me;
+	enable &= ~me;
+
+/* enable interrupt to output */
+	irq_reg_store(ID,
+		_HRT_IRQ_CONTROLLER_ENABLE_REG_IDX, enable);
+/* unmask interrupt from input */
+	irq_reg_store(ID,
+		_HRT_IRQ_CONTROLLER_MASK_REG_IDX, mask);
+/* clear current irq only */
+	irq_reg_store(ID,
+		_HRT_IRQ_CONTROLLER_CLEAR_REG_IDX, me);
+
+	irq_wait_for_write_complete(ID);
+
+return;
+}
+
+enum hrt_isp_css_irq_status irq_get_channel_id(
+	const irq_ID_t				ID,
+	unsigned int				*irq_id)
+{
+	unsigned int irq_status = irq_reg_load(ID,
+		_HRT_IRQ_CONTROLLER_STATUS_REG_IDX);
+	unsigned int idx;
+	enum hrt_isp_css_irq_status status = hrt_isp_css_irq_status_success;
+
+	assert(ID < N_IRQ_ID);
+	assert(irq_id != NULL);
+
+/* find the first irq bit */
+	for (idx = 0; idx < IRQ_N_CHANNEL[ID]; idx++) {
+		if (irq_status & (1U << idx))
+			break;
+	}
+	if (idx == IRQ_N_CHANNEL[ID])
+		return hrt_isp_css_irq_status_error;
+
+/* now check whether there are more bits set */
+	if (irq_status != (1U << idx))
+		status = hrt_isp_css_irq_status_more_irqs;
+
+	irq_reg_store(ID,
+		_HRT_IRQ_CONTROLLER_CLEAR_REG_IDX, 1U << idx);
+
+	irq_wait_for_write_complete(ID);
+
+	if (irq_id != NULL)
+		*irq_id = (unsigned int)idx;
+
+return status;
+}
+
+static const hrt_address IRQ_REQUEST_ADDR[N_IRQ_SW_CHANNEL_ID] = {
+	_REG_GP_IRQ_REQUEST0_ADDR,
+	_REG_GP_IRQ_REQUEST1_ADDR};
+
+void irq_raise(
+	const irq_ID_t				ID,
+	const irq_sw_channel_id_t	irq_id)
+{
+	hrt_address		addr;
+
+	OP___assert(ID == IRQ0_ID);
+	OP___assert(IRQ_BASE[ID] != (hrt_address)-1);
+	OP___assert(irq_id < N_IRQ_SW_CHANNEL_ID);
+
+	(void)ID;
+
+	addr = IRQ_REQUEST_ADDR[irq_id];
+/* The SW IRQ pins are remapped to offset zero */
+	gp_device_reg_store(GP_DEVICE0_ID,
+		(unsigned int)addr, 1);
+	gp_device_reg_store(GP_DEVICE0_ID,
+		(unsigned int)addr, 0);
+return;
+}
+
+void irq_controller_get_state(
+	const irq_ID_t				ID,
+	irq_controller_state_t		*state)
+{
+	assert(ID < N_IRQ_ID);
+	assert(state != NULL);
+
+	state->irq_edge = irq_reg_load(ID,
+		_HRT_IRQ_CONTROLLER_EDGE_REG_IDX);
+	state->irq_mask = irq_reg_load(ID,
+		_HRT_IRQ_CONTROLLER_MASK_REG_IDX);
+	state->irq_status = irq_reg_load(ID,
+		_HRT_IRQ_CONTROLLER_STATUS_REG_IDX);
+	state->irq_enable = irq_reg_load(ID,
+		_HRT_IRQ_CONTROLLER_ENABLE_REG_IDX);
+	state->irq_level_not_pulse = irq_reg_load(ID,
+		_HRT_IRQ_CONTROLLER_EDGE_NOT_PULSE_REG_IDX);
+return;
+}
+
+bool any_virq_signal(void)
+{
+	unsigned int irq_status = irq_reg_load(IRQ0_ID,
+		_HRT_IRQ_CONTROLLER_STATUS_REG_IDX);
+
+return (irq_status != 0);
+}
+
+void cnd_virq_enable_channel(
+	const virq_id_t				irq_ID,
+	const bool					en)
+{
+	irq_ID_t		i;
+	unsigned int	channel_ID;
+	irq_ID_t		ID = virq_get_irq_id(irq_ID, &channel_ID);
+	
+	assert(ID < N_IRQ_ID);
+
+	for (i=IRQ1_ID;i<N_IRQ_ID;i++) {
+	/* It is not allowed to enable the pin of a nested IRQ directly */
+		assert(irq_ID != IRQ_NESTING_ID[i]);
+	}
+
+	if (en) {
+		irq_enable_channel(ID, channel_ID);
+		if (IRQ_NESTING_ID[ID] != N_virq_id) {
+/* Single level nesting, otherwise we'd need to recurse */
+			irq_enable_channel(IRQ0_ID, IRQ_NESTING_ID[ID]);
+		}
+	} else {
+		irq_disable_channel(ID, channel_ID);
+		if ((IRQ_NESTING_ID[ID] != N_virq_id) && !any_irq_channel_enabled(ID)) {
+/* Only disable the top if the nested ones are empty */
+			irq_disable_channel(IRQ0_ID, IRQ_NESTING_ID[ID]);
+		}
+	}
+return;
+}
+
+
+void virq_clear_all(void)
+{
+	irq_ID_t	irq_id;
+
+	for (irq_id = (irq_ID_t)0; irq_id < N_IRQ_ID; irq_id++) {
+		irq_clear_all(irq_id);
+	}
+return;
+}
+
+enum hrt_isp_css_irq_status virq_get_channel_signals(
+	virq_info_t					*irq_info)
+{
+	enum hrt_isp_css_irq_status irq_status = hrt_isp_css_irq_status_error;
+	irq_ID_t ID;
+
+	assert(irq_info != NULL);
+
+	for (ID = (irq_ID_t)0 ; ID < N_IRQ_ID; ID++) {
+		if (any_irq_channel_enabled(ID)) {
+			hrt_data	irq_data = irq_reg_load(ID,
+				_HRT_IRQ_CONTROLLER_STATUS_REG_IDX);
+
+			if (irq_data != 0) {
+/* The error condition is an IRQ pulse received with no IRQ status written */
+				irq_status = hrt_isp_css_irq_status_success;
+			}
+
+			irq_info->irq_status_reg[ID] |= irq_data;
+
+			irq_reg_store(ID,
+				_HRT_IRQ_CONTROLLER_CLEAR_REG_IDX, irq_data);
+
+			irq_wait_for_write_complete(ID);
+		}
+	}
+
+return irq_status;
+}
+
+void virq_clear_info(
+	virq_info_t					*irq_info)
+{
+	irq_ID_t ID;
+
+	assert(irq_info != NULL);
+
+	for (ID = (irq_ID_t)0 ; ID < N_IRQ_ID; ID++) {
+			irq_info->irq_status_reg[ID] = 0;
+	}
+return;
+}
+
+enum hrt_isp_css_irq_status virq_get_channel_id(
+	virq_id_t					*irq_id)
+{
+	unsigned int irq_status = irq_reg_load(IRQ0_ID,
+		_HRT_IRQ_CONTROLLER_STATUS_REG_IDX);
+	unsigned int idx;
+	enum hrt_isp_css_irq_status status = hrt_isp_css_irq_status_success;
+	irq_ID_t ID;
+
+	assert(irq_id != NULL);
+
+/* find the first irq bit on device 0 */
+	for (idx = 0; idx < IRQ_N_CHANNEL[IRQ0_ID]; idx++) {
+		if (irq_status & (1U << idx))
+			break;
+	}
+
+	if (idx == IRQ_N_CHANNEL[IRQ0_ID]) {
+		return hrt_isp_css_irq_status_error;
+	}
+
+/* Check whether there are more bits set on device 0 */
+	if (irq_status != (1U << idx)) {
+		status = hrt_isp_css_irq_status_more_irqs;
+	}
+
+/* Check whether we have an IRQ on one of the nested devices */
+	for (ID = N_IRQ_ID-1 ; ID > (irq_ID_t)0; ID--) {
+		if (IRQ_NESTING_ID[ID] == (virq_id_t)idx) {
+			break;
+		}
+	}
+
+/* If we have a nested IRQ, load that state, discard the device 0 state */
+	if (ID != IRQ0_ID) {
+		irq_status = irq_reg_load(ID,
+			_HRT_IRQ_CONTROLLER_STATUS_REG_IDX);
+/* find the first irq bit on device "id" */
+		for (idx = 0; idx < IRQ_N_CHANNEL[ID]; idx++) {
+			if (irq_status & (1U << idx))
+				break;
+		}
+
+		if (idx == IRQ_N_CHANNEL[ID]) {
+			return hrt_isp_css_irq_status_error;
+		}
+
+/* Alternatively check whether there are more bits set on this device */
+		if (irq_status != (1U << idx)) {
+			status = hrt_isp_css_irq_status_more_irqs;
+		} else {
+/* If this device is empty, clear the state on device 0 */
+			irq_reg_store(IRQ0_ID,
+				_HRT_IRQ_CONTROLLER_CLEAR_REG_IDX, 1U << IRQ_NESTING_ID[ID]);
+		}
+	} /* if (ID != IRQ0_ID) */
+
+/* Here we proceed to clear the IRQ on detected device, if no nested IRQ, this is device 0 */
+	irq_reg_store(ID,
+		_HRT_IRQ_CONTROLLER_CLEAR_REG_IDX, 1U << idx);
+
+	irq_wait_for_write_complete(ID);
+
+	idx += IRQ_N_ID_OFFSET[ID];
+	if (irq_id != NULL)
+		*irq_id = (virq_id_t)idx;
+
+return status;
+}
+
+STORAGE_CLASS_INLINE void irq_wait_for_write_complete(
+	const irq_ID_t		ID)
+{
+	assert(ID < N_IRQ_ID);
+	assert(IRQ_BASE[ID] != (hrt_address)-1);
+	(void)ia_css_device_load_uint32(IRQ_BASE[ID] +
+		_HRT_IRQ_CONTROLLER_ENABLE_REG_IDX*sizeof(hrt_data));
+}
+
+STORAGE_CLASS_INLINE bool any_irq_channel_enabled(
+	const irq_ID_t				ID)
+{
+	hrt_data	en_reg;
+
+	assert(ID < N_IRQ_ID);
+
+	en_reg = irq_reg_load(ID,
+		_HRT_IRQ_CONTROLLER_ENABLE_REG_IDX);
+
+return (en_reg != 0);
+}
+
+STORAGE_CLASS_INLINE irq_ID_t virq_get_irq_id(
+	const virq_id_t		irq_ID,
+	unsigned int		*channel_ID)
+{
+	irq_ID_t ID;
+
+	assert(channel_ID != NULL);
+
+	for (ID = (irq_ID_t)0 ; ID < N_IRQ_ID; ID++) {
+		if (irq_ID < IRQ_N_ID_OFFSET[ID + 1]) {
+			break;
+		}
+	}
+
+	*channel_ID = (unsigned int)irq_ID - IRQ_N_ID_OFFSET[ID];
+
+return ID;
+}