staging/atomisp: Add support for the Intel IPU v2

This patch adds support for the Intel IPU v2 as found on Android and IoT
Baytrail-T and Baytrail-CR platforms (those with the IPU PCI mapped). You
will also need the firmware files from your device (Android usually puts
them into /etc) - or you can find them in the downloadable restore/upgrade
kits if you blew them away for some reason.

It may be possible to extend the driver to handle the BYT/T windows
platforms such as the ASUS T100TA. These platforms don't expose the IPU via
the PCI interface but via ACPI buried in the GPU description and with the
camera information somewhere unknown so would need a platform driver
interface adding to the codebase *IFF* the firmware works on such devices.

To get good results you also need a suitable support library such as
libxcam. The camera is intended to be driven from Android so it has a lot of
features that many desktop apps don't fully spport.

In theory all the pieces are there to build it with -DISP2401 and some
differing files to get CherryTrail/T support, but unifying the drivers
properlly is a work in progress.

The IPU driver represents the work of a lot of people within Intel over many
years. It's historical goal was portability rather than Linux upstream. Any
queries about the upstream aimed driver should be sent to me not to the
original authors.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 233 insertions, 0 deletions

diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/css_2401_csi2p_system/host/ibuf_ctrl_private.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/css_2401_csi2p_system/host/ibuf_ctrl_private.h
new file mode 100644
index 000000000000..470c92d287fe
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/css_2401_csi2p_system/host/ibuf_ctrl_private.h
@@ -0,0 +1,233 @@
+/*
+ * Support for Intel Camera Imaging ISP subsystem.
+ * Copyright (c) 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.
+ */
+
+#ifndef __IBUF_CTRL_PRIVATE_H_INCLUDED__
+#define __IBUF_CTRL_PRIVATE_H_INCLUDED__
+
+#include "ibuf_ctrl_public.h"
+
+#include "device_access.h"	/* ia_css_device_load_uint32 */
+
+#include "assert_support.h" /* assert */
+#include "print_support.h" /* print */
+
+
+/*****************************************************
+ *
+ * Native command interface (NCI).
+ *
+ *****************************************************/
+/**
+ * @brief Get the ibuf-controller state.
+ * Refer to "ibuf_ctrl_public.h" for details.
+ */
+STORAGE_CLASS_IBUF_CTRL_C void ibuf_ctrl_get_state(
+		const ibuf_ctrl_ID_t ID,
+		ibuf_ctrl_state_t *state)
+{
+	uint32_t i;
+
+	state->recalc_words =
+		ibuf_ctrl_reg_load(ID, _IBUF_CNTRL_RECALC_WORDS_STATUS);
+	state->arbiters =
+		ibuf_ctrl_reg_load(ID, _IBUF_CNTRL_ARBITERS_STATUS);
+
+	/*
+	 * Get the values of the register-set per
+	 * ibuf-controller process.
+	 */
+	for (i = 0; i < N_IBUF_CTRL_PROCS[ID]; i++) {
+		ibuf_ctrl_get_proc_state(
+				ID,
+				i,
+				&(state->proc_state[i]));
+	}
+}
+
+/**
+ * @brief Get the state of the ibuf-controller process.
+ * Refer to "ibuf_ctrl_public.h" for details.
+ */
+STORAGE_CLASS_IBUF_CTRL_C void ibuf_ctrl_get_proc_state(
+		const ibuf_ctrl_ID_t ID,
+		const uint32_t proc_id,
+		ibuf_ctrl_proc_state_t	*state)
+{
+	hrt_address reg_bank_offset;
+
+	reg_bank_offset =
+		_IBUF_CNTRL_PROC_REG_ALIGN * (1 + proc_id);
+
+	state->num_items =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_NUM_ITEMS_PER_STORE);
+
+	state->num_stores =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_NUM_STORES_PER_FRAME);
+
+	state->dma_channel =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_DMA_CHANNEL);
+
+	state->dma_command =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_DMA_CMD);
+
+	state->ibuf_st_addr =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_BUFFER_START_ADDRESS);
+
+	state->ibuf_stride =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_BUFFER_STRIDE);
+
+	state->ibuf_end_addr =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_BUFFER_END_ADDRESS);
+
+	state->dest_st_addr =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_DEST_START_ADDRESS);
+
+	state->dest_stride =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_DEST_STRIDE);
+
+	state->dest_end_addr =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_DEST_END_ADDRESS);
+
+	state->sync_frame =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_SYNC_FRAME);
+
+	state->sync_command =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_STR2MMIO_SYNC_CMD);
+
+	state->store_command =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_STR2MMIO_STORE_CMD);
+
+	state->shift_returned_items =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_SHIFT_ITEMS);
+
+	state->elems_ibuf =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_ELEMS_P_WORD_IBUF);
+
+	state->elems_dest =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_ELEMS_P_WORD_DEST);
+
+	state->cur_stores =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_CUR_STORES);
+
+	state->cur_acks =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_CUR_ACKS);
+
+	state->cur_s2m_ibuf_addr =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_CUR_S2M_IBUF_ADDR);
+
+	state->cur_dma_ibuf_addr =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_CUR_DMA_IBUF_ADDR);
+
+	state->cur_dma_dest_addr =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_CUR_DMA_DEST_ADDR);
+
+	state->cur_isp_dest_addr =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_CUR_ISP_DEST_ADDR);
+
+	state->dma_cmds_send =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_CUR_NR_DMA_CMDS_SEND);
+
+	state->main_cntrl_state =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_MAIN_CNTRL_STATE);
+
+	state->dma_sync_state =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_DMA_SYNC_STATE);
+
+	state->isp_sync_state =
+		ibuf_ctrl_reg_load(ID, reg_bank_offset + _IBUF_CNTRL_ISP_SYNC_STATE);
+}
+/**
+ * @brief Dump the ibuf-controller state.
+ * Refer to "ibuf_ctrl_public.h" for details.
+ */
+STORAGE_CLASS_IBUF_CTRL_C void ibuf_ctrl_dump_state(
+		const ibuf_ctrl_ID_t ID,
+		ibuf_ctrl_state_t *state)
+{
+	uint32_t i;
+	ia_css_print("IBUF controller ID %d recalculate words 0x%x\n", ID, state->recalc_words);
+	ia_css_print("IBUF controller ID %d arbiters 0x%x\n", ID, state->arbiters);
+
+	/*
+	 * Dump the values of the register-set per
+	 * ibuf-controller process.
+	 */
+	for (i = 0; i < N_IBUF_CTRL_PROCS[ID]; i++) {
+		ia_css_print("IBUF controller ID %d Process ID %d num_items 0x%x\n", ID, i, state->proc_state[i].num_items);
+		ia_css_print("IBUF controller ID %d Process ID %d num_stores 0x%x\n", ID, i, state->proc_state[i].num_stores);
+		ia_css_print("IBUF controller ID %d Process ID %d dma_channel 0x%x\n", ID, i, state->proc_state[i].dma_channel);
+		ia_css_print("IBUF controller ID %d Process ID %d dma_command 0x%x\n", ID, i, state->proc_state[i].dma_command);
+		ia_css_print("IBUF controller ID %d Process ID %d ibuf_st_addr 0x%x\n", ID, i, state->proc_state[i].ibuf_st_addr);
+		ia_css_print("IBUF controller ID %d Process ID %d ibuf_stride 0x%x\n", ID, i, state->proc_state[i].ibuf_stride);
+		ia_css_print("IBUF controller ID %d Process ID %d ibuf_end_addr 0x%x\n", ID, i, state->proc_state[i].ibuf_end_addr);
+		ia_css_print("IBUF controller ID %d Process ID %d dest_st_addr 0x%x\n", ID, i, state->proc_state[i].dest_st_addr);
+		ia_css_print("IBUF controller ID %d Process ID %d dest_stride 0x%x\n", ID, i, state->proc_state[i].dest_stride);
+		ia_css_print("IBUF controller ID %d Process ID %d dest_end_addr 0x%x\n", ID, i, state->proc_state[i].dest_end_addr);
+		ia_css_print("IBUF controller ID %d Process ID %d sync_frame 0x%x\n", ID, i, state->proc_state[i].sync_frame);
+		ia_css_print("IBUF controller ID %d Process ID %d sync_command 0x%x\n", ID, i, state->proc_state[i].sync_command);
+		ia_css_print("IBUF controller ID %d Process ID %d store_command 0x%x\n", ID, i, state->proc_state[i].store_command);
+		ia_css_print("IBUF controller ID %d Process ID %d shift_returned_items 0x%x\n", ID, i, state->proc_state[i].shift_returned_items);
+		ia_css_print("IBUF controller ID %d Process ID %d elems_ibuf 0x%x\n", ID, i, state->proc_state[i].elems_ibuf);
+		ia_css_print("IBUF controller ID %d Process ID %d elems_dest 0x%x\n", ID, i, state->proc_state[i].elems_dest);
+		ia_css_print("IBUF controller ID %d Process ID %d cur_stores 0x%x\n", ID, i, state->proc_state[i].cur_stores);
+		ia_css_print("IBUF controller ID %d Process ID %d cur_acks 0x%x\n", ID, i, state->proc_state[i].cur_acks);
+		ia_css_print("IBUF controller ID %d Process ID %d cur_s2m_ibuf_addr 0x%x\n", ID, i, state->proc_state[i].cur_s2m_ibuf_addr);
+		ia_css_print("IBUF controller ID %d Process ID %d cur_dma_ibuf_addr 0x%x\n", ID, i, state->proc_state[i].cur_dma_ibuf_addr);
+		ia_css_print("IBUF controller ID %d Process ID %d cur_dma_dest_addr 0x%x\n", ID, i, state->proc_state[i].cur_dma_dest_addr);
+		ia_css_print("IBUF controller ID %d Process ID %d cur_isp_dest_addr 0x%x\n", ID, i, state->proc_state[i].cur_isp_dest_addr);
+		ia_css_print("IBUF controller ID %d Process ID %d dma_cmds_send 0x%x\n", ID, i, state->proc_state[i].dma_cmds_send);
+		ia_css_print("IBUF controller ID %d Process ID %d main_cntrl_state 0x%x\n", ID, i, state->proc_state[i].main_cntrl_state);
+		ia_css_print("IBUF controller ID %d Process ID %d dma_sync_state 0x%x\n", ID, i, state->proc_state[i].dma_sync_state);
+		ia_css_print("IBUF controller ID %d Process ID %d isp_sync_state 0x%x\n", ID, i, state->proc_state[i].isp_sync_state);
+	}
+}
+/** end of NCI */
+
+/*****************************************************
+ *
+ * Device level interface (DLI).
+ *
+ *****************************************************/
+/**
+ * @brief Load the register value.
+ * Refer to "ibuf_ctrl_public.h" for details.
+ */
+STORAGE_CLASS_IBUF_CTRL_C hrt_data ibuf_ctrl_reg_load(
+	const ibuf_ctrl_ID_t ID,
+	const hrt_address reg)
+{
+	assert(ID < N_IBUF_CTRL_ID);
+	assert(IBUF_CTRL_BASE[ID] != (hrt_address)-1);
+	return ia_css_device_load_uint32(IBUF_CTRL_BASE[ID] + reg*sizeof(hrt_data));
+}
+
+
+/**
+ * @brief Store a value to the register.
+ * Refer to "ibuf_ctrl_public.h" for details.
+ */
+STORAGE_CLASS_IBUF_CTRL_C void ibuf_ctrl_reg_store(
+	const ibuf_ctrl_ID_t ID,
+	const hrt_address reg,
+	const hrt_data value)
+{
+	assert(ID < N_IBUF_CTRL_ID);
+	assert(IBUF_CTRL_BASE[ID] != (hrt_address)-1);
+
+	ia_css_device_store_uint32(IBUF_CTRL_BASE[ID] + reg*sizeof(hrt_data), value);
+}
+/** end of DLI */
+
+
+#endif /* __IBUF_CTRL_PRIVATE_H_INCLUDED__ */