drivers/amlogic/media/vout/hdmitx/hdmi_tx_20/dv_emp_vsem.c - manifest_repos/kernel - Git at Google

 /*
  * drivers/amlogic/media/vout/hdmitx/hdmi_tx_20/dv_emp_vsem.c
  *
  * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
  *
  * 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.
  *
  */

 #include <asm/cacheflush.h>
 #include <linux/version.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/kthread.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/fs.h>
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/device.h>
 #include <linux/mm.h>
 #include <linux/major.h>
 #include <linux/dma-mapping.h>
 #include <linux/platform_device.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/mutex.h>
 #include <linux/cdev.h>
 #include <linux/ctype.h>
 #include <linux/extcon.h>
 #include <linux/proc_fs.h>
 #include <linux/uaccess.h>
 #include <linux/workqueue.h>
 #include <linux/input.h>
 #include <linux/irq.h>
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/of_address.h>
 #include <linux/reboot.h>
 #include <linux/extcon.h>
 #include <linux/i2c.h>
 #include <linux/amlogic/media/vout/hdmi_tx/hdmi_tx_module.h>
 #include "./hw/hdmi_tx_reg.h"

 #include "dv_emp_vsem.h"

 #undef pr_fmt
 #define pr_fmt(fmt) "dvemp: " fmt

 static unsigned int crc32_lut[256] = {
 0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
 0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
 0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef,
 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
 0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,
 0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,
 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4,
 0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc,
 0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050,
 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
 0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1,
 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
 0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,
 0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,
 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
 0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd,
 0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,
 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,
 0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,
 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a,
 0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,
 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
 0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,
 0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
 };

 void SetByteField(unsigned char *meta_byte,
 				  unsigned char field_value,
 				  unsigned char field_mask)
 {
 	unsigned int count;
 	unsigned int test_val;
 	unsigned int set_val;
 	unsigned char test_mask;

 	test_mask = field_mask;
 	count = 0;
 	while ((test_mask > 0) && (count < 8)) {
 		test_val = 1 << count;
 		if ((test_val & field_mask) == test_val) {
 			set_val = (field_value & 1);
 			field_value >>= 1;
 			if (set_val > 0)
 				*meta_byte |= 1 << count;
 			else
 				*meta_byte &= ~(1 << count);
 			test_mask  &= ~(1 << count);
 		}
 		count++;
 	}
 }

 /* given metadata length, figure out how many packets are needed */
 unsigned int vsem_get_num_packets(unsigned int metadata_len,
 						unsigned int *last_packet_len)
 {
 	unsigned int num_packets = 1;

 	if (metadata_len == 0)
 		return 0;

 	/* how many packets are needed */
 	*last_packet_len = metadata_len;
 	if (*last_packet_len > VSEM_FIRST_PACKET_EDR_DATA_LEN) {
 		*last_packet_len -= VSEM_FIRST_PACKET_EDR_DATA_LEN;
 		while (*last_packet_len > VSEM_PACKET_BODY_LEN) {
 			*last_packet_len -= VSEM_PACKET_BODY_LEN;
 			num_packets++;
 		}
 		if (*last_packet_len > 0)
 			num_packets++;
 	}

 	return num_packets;
 }

 unsigned int crc32(unsigned int crc, const void *buf, unsigned int size)
 {
 	const unsigned char *p = (unsigned char *)buf;

 	crc = ~crc;
 	while (size) {
 		crc = (crc << 8) ^ crc32_lut[((crc >> 24) ^ *p) & 0xff];
 		p++;
 		size--;
 	}

 	return crc;
 }

 static int pack_vsemds(struct emp_edr_config *pconfig,
 					   unsigned char *p_metadata,
 					   int metadata_len,
 					   unsigned char data_version)
 {
 	struct vsem_data_packet *cur_packet;
 	int count, acrc_loc, frt_loc;
 	unsigned int p;
 	unsigned int num_packets = 1;
 	unsigned int last_packet_len = 0;
 	unsigned int cur_packet_len;
 	unsigned int crc;
 	unsigned int edr_data_len;
 	unsigned char *pcrc, *pcrcfrt, acrc[4];
 	unsigned char PB0;
 	unsigned char HB1;

 	edr_data_len = metadata_len + VSEM_CRC_LENGTH;
 	pcrcfrt = NULL;
 	/* how many packets are needed */
 	num_packets = vsem_get_num_packets(edr_data_len, &last_packet_len);
 	if (num_packets > MAX_VSEM_NUM)
 		pr_info("vsem metada_len is too big\n");

 	/* allocate packets memory */
 	pconfig->num_packets = num_packets;
 	if (pconfig->vsem_packets == NULL) {
 		pr_info("vsem_packets don't alloc\n");
 		return -1;
 	}

 	memset(pconfig->vsem_packets, 0,
 		sizeof(struct vsem_data_packet) * num_packets);

 	/*compute CRC*/
 	crc = crc32(0, p_metadata, metadata_len);

 	/* process the first packet */
 	p = 0;
 	cur_packet = &pconfig->vsem_packets[p];
 	pcrc = cur_packet->PB;
 	cur_packet->packet_type = 0x7F;
 	HB1 = 0;
 	SetByteField(&HB1, 1, FIELD_MASK_FIRST);
 	SetByteField(&HB1, 0, FIELD_MASK_LAST);
 	cur_packet->HB1 = HB1;
 	cur_packet->sequence_index = p;
 	edr_data_len += 6; /* PB0~12 */
 	PB0 = 0;
 	SetByteField(&PB0, 1, FIELD_MASK_NEW);
 	SetByteField(&PB0, 1, FIELD_MASK_END);
 	SetByteField(&PB0, 2, FIELD_MASK_DS_TYPE);
 	SetByteField(&PB0, 1, FIELD_MASK_AFR);
 	SetByteField(&PB0, 1, FIELD_MASK_VFR);
 	SetByteField(&PB0, 1, FIELD_MASK_SYNC);
 	cur_packet->PB[0] = PB0;
 	cur_packet->PB[1] = 0x00; /* Reserved */
 	cur_packet->PB[2] = 0x00; /* Organization ID */
 	cur_packet->PB[3] = 0x00; /* Data Set Tag hi  = 0 */
 	cur_packet->PB[4] = 0x00; /* Data Set Tag low = 0 */
 	cur_packet->PB[5] = edr_data_len >> 8;   /* Data Set Length hi  */
 	cur_packet->PB[6] = edr_data_len & 0xff; /* Data Set Length low */
 	cur_packet->PB[7] = 0x46;  /* MD0 */
 	cur_packet->PB[8] = 0xD0;  /* MD1 */
 	cur_packet->PB[9] = 0x00;  /* MD2 */
 	cur_packet->PB[10] = data_version; /* data_version */
 	cur_packet->PB[11] = 0x00;  /* Reserved */
 	cur_packet->PB[12] = 0x00;  /* Reserved */
 	cur_packet_len = VSEM_FIRST_PACKET_EDR_DATA_LEN;
 	if (cur_packet_len > metadata_len)
 		cur_packet_len = metadata_len;
 	memcpy(&cur_packet->PB[13], p_metadata, cur_packet_len);
 	pcrc = &cur_packet->PB[13];
 	p_metadata += cur_packet_len;
 	metadata_len -= cur_packet_len;
 	num_packets--;
 	p++;
 	/* process following packets */
 	while (num_packets > 0) {
 		if (p == 1)
 			frt_loc = 13 + cur_packet_len - 1;
 		else
 			frt_loc = cur_packet_len - 1;
 		pcrcfrt =
 			&pconfig->vsem_packets[p - 1].PB[frt_loc];
 		cur_packet = &pconfig->vsem_packets[p];
 		cur_packet->packet_type = 0x7F;
 		HB1 = 0x00;
 		SetByteField(&HB1, 0, FIELD_MASK_FIRST);
 		if (num_packets == 1) {
 			SetByteField(&HB1, 1, FIELD_MASK_LAST);
 			cur_packet_len = last_packet_len;
 		} else {
 			SetByteField(&HB1, 0, FIELD_MASK_LAST);
 			cur_packet_len = VSEM_PACKET_BODY_LEN;
 		}
 		cur_packet->HB1 = HB1;
 		cur_packet->sequence_index = (unsigned char)p;
 		if (metadata_len > 0) {
 			if (metadata_len >= cur_packet_len) {
 				memcpy(cur_packet->PB, p_metadata, cur_packet_len);
 				metadata_len -= cur_packet_len;
 				p_metadata += cur_packet_len;
 			} else {
 				memcpy(cur_packet->PB, p_metadata, metadata_len);
 				p_metadata += metadata_len;
 				metadata_len = 0;
 			}
 		}
 		pcrc = &cur_packet->PB[0];
 		num_packets--;
 		p++;
 	}
 	/*write CRC*/
 	acrc[0] = (crc & 0xff000000) >> 24;
 	acrc[1] = (crc & 0xff0000) >> 16;
 	acrc[2] = (crc & 0xff00) >>  8;
 	acrc[3] =  crc & 0xff;
 	if (last_packet_len >= VSEM_CRC_LENGTH) {
 		pcrc += last_packet_len - VSEM_CRC_LENGTH;
 		for (count = 0; count < 4; count++) {
 			pcrc[count] = acrc[count];
 		}
 	} else {
 		if (pcrcfrt != NULL) {
 		/*last packet*/
 			pcrc = &cur_packet->PB[0];
 			for (count = last_packet_len - 1;
 			     count >= 0;
 			     count--) {
 				/*VSEM_CRC_LENGTH - 1 - (last_packet_len - 1 - count)*/
 				acrc_loc = VSEM_CRC_LENGTH - last_packet_len + count;
 				pcrc[count] = acrc[acrc_loc];
 			}
 			/*the packet before last packet*/
 			pcrcfrt -= VSEM_CRC_LENGTH  - last_packet_len;
 			pcrcfrt++;
 			for (count = 0;
 			     count < VSEM_CRC_LENGTH - last_packet_len;
 			     count++) {
 			     pcrcfrt[count] = acrc[count];
 			}
 		}
 	}
 	return 0;
 }

 static struct dv_emp_hdmi_cfg dv_emp_cfg_val;
 static void hdmitx_set_dv_emp_pkt(struct emp_edr_config *pconfig)
 {
 	struct hdmitx_dev *hdev;

 	hdev = dv_emp_cfg_val.hdev;
 	hdev->hwop.cntlconfig(hdev, CONF_EMP_PHY_ADDR, pconfig->phys_ptr);
 	hdev->hwop.cntlconfig(hdev, CONF_EMP_NUMBER, pconfig->num_packets);
 }

 static void hdmitx_disable_dv_emp_pkt(void)
 {
 	struct hdmitx_dev *hdev;

 	hdev = dv_emp_cfg_val.hdev;
 	hdev->hwop.cntlconfig(hdev, CONF_EMP_NUMBER, 0);
 }

 static void hdmitx_emp_dv_infoframe(struct hdmitx_dev *hdev,
 					enum eotf_type type,
 					enum eotf_type type_save,
 				    bool signal_sdr)
 {
 	if ((type == EOTF_T_DOLBYVISION) &&
 		(type != type_save)) {
 		pr_info("%s: T_Dolby Vision enter\n", __func__);
 		/*first disable drm package*/
 		hdev->hwop.setpacket(HDMI_PACKET_DRM,
 			NULL, NULL);
 		hdev->hwop.cntlconfig(hdev, CONF_AVI_BT2020,
 			CLR_AVI_BT2020);/*BT709*/
 		hdev->hwop.cntlconfig(hdev,
 			CONF_AVI_RGBYCC_INDIC,
 			COLORSPACE_RGB444);
 		hdev->hwop.cntlconfig(hdev, CONF_AVI_Q01,
 			RGB_RANGE_FUL);
 	}
 	if  ((type == EOTF_T_LL_MODE) &&
 		 (type != type_save)) {
 		pr_info("%s: Dolby Vision LL enter\n", __func__);
 		/*first disable drm package*/
 		hdev->hwop.setpacket(HDMI_PACKET_DRM,
 			NULL, NULL);
 		if (hdev->rxcap.colorimetry_data & 0xe0)
 			/*if RX support BT2020, then output BT2020*/
 			hdev->hwop.cntlconfig(hdev, CONF_AVI_BT2020,
 				SET_AVI_BT2020);/*BT2020*/
 		else
 			hdev->hwop.cntlconfig(hdev, CONF_AVI_BT2020,
 				CLR_AVI_BT2020);/*BT709*/
 		hdev->hwop.cntlconfig(hdev,
 			CONF_AVI_RGBYCC_INDIC,
 			COLORSPACE_YUV422);
 		hdev->hwop.cntlconfig(hdev, CONF_AVI_YQ01,
 			YCC_RANGE_LIM);
 	}
 	if ((type != EOTF_T_DOLBYVISION) &&
 		(type != EOTF_T_LL_MODE) &&
 		(signal_sdr == true)) {
 		pr_info("%s: Dolby Vision exit\n", __func__);
 		update_current_para(hdev);
 		hdev->hwop.cntlconfig(hdev,
 			CONF_AVI_RGBYCC_INDIC, hdev->para->cs);
 		hdev->hwop.cntlconfig(hdev,
 			CONF_AVI_Q01, RGB_RANGE_DEFAULT);
 		hdev->hwop.cntlconfig(hdev,
 			CONF_AVI_YQ01, YCC_RANGE_LIM);
 		hdev->hwop.cntlconfig(hdev, CONF_AVI_BT2020,
 		CLR_AVI_BT2020);/*BT709*/
 	}
 }

 int send_dv_emp(enum eotf_type type,
 		enum mode_type tunnel_mode,
 		struct dv_vsif_para *vsif_data,
 		unsigned char *p_vsem,
 		int vsem_len,
 		bool signal_sdr)
 {
 	struct emp_edr_config config;
 	int rv;
 	struct hdmitx_dev *hdev = dv_emp_cfg_val.hdev;
 	unsigned char data_version = 0;
 	static enum eotf_type type_save = EOTF_T_NULL;
 	static bool vsem_flag = false;

 	if (!hdev) {
 		pr_info("EMP hdmitx: no device\n");
 		return -1;
 	}

 	if ((hdev->chip_type) < MESON_CPU_ID_GXL) {
 		pr_info("EMP hdmitx: not support DolbyVision\n");
 		return -1;
 	}
 	if ((hdev->ready == 0) ||
 		(hdev->rxcap.dv_info.ieeeoui != DV_IEEE_OUI)) {
 		return -1;
 	}

 	if (hdr_status_pos != 2)
 		pr_info("EMP hdmitx_set_vsif_pkt: type = %d\n", type);
 	hdr_status_pos = 2;
 	hdev->hdmi_current_eotf_type = type;
 	hdmitx_emp_dv_infoframe(hdev, type, type_save, signal_sdr);
 	type_save = type;
 	if ((type != EOTF_T_DOLBYVISION) &&
 	    (type != EOTF_T_LL_MODE)) {
 		if (vsem_flag == true) { /*exit from Dolby VS-EMDS*/
 			hdmitx_disable_dv_emp_pkt();
 		} else {  /*exit from Dolby VSIF*/
 			hdmitx_set_vsif_pkt(type, tunnel_mode, vsif_data, signal_sdr);
 		}
 		hdev->dv_src_feature = 0;
 		vsem_flag = false;
 		pr_info("EMP hdmitx_set_vsif_pkt: stop\n");
 		return 1;
 	}
 	hdev->dv_src_feature = 1;
 	if (p_vsem) { /*Dolby VS-EMDS*/
 		vsem_flag = true;
 		if (type == EOTF_T_DOLBYVISION)
 			data_version = 0;
 		else
 			data_version = 1;

 		dma_sync_single_for_cpu(
 			hdev->hdtx_dev,
 			dv_emp_cfg_val.pkts_phy_addr,
 			dv_emp_cfg_val.size,
 			DMA_TO_DEVICE);
 			config.num_packets = 0;
 			config.phys_ptr = dv_emp_cfg_val.pkts_phy_addr;
 			config.vsem_packets = dv_emp_cfg_val.p_pkts;
 		rv = pack_vsemds(&config, p_vsem, vsem_len, data_version);
 		if (rv != 0) {
 			pr_info("pack_vsem fail!\n");
 			return -1;
 		}
 		/*Disable Dolby VSIF send*/
 		hdev->hwop.setpacket(HDMI_PACKET_VEND, NULL, NULL);
 		/*Enable Dolby VS-EMDS send*/
 		dma_sync_single_for_device(
 			hdev->hdtx_dev,
 			dv_emp_cfg_val.pkts_phy_addr,
 			dv_emp_cfg_val.size,
 			DMA_TO_DEVICE);
 		hdmitx_set_dv_emp_pkt(&config);
 	} else { /*Dolby VSIF or HDMI 14b VSIF*/
 		vsem_flag = false;
 		/*Disable Dolby VS-EMDS send*/
 		hdmitx_disable_dv_emp_pkt();
 		/*Enable Dolby VSIF send*/
 		hdmitx_set_vsif_pkt(type, tunnel_mode, vsif_data, signal_sdr);
 	}
 	return 1;
 }
 EXPORT_SYMBOL(send_dv_emp);

 void vsem_init_cfg(struct hdmitx_dev *hdev)
 {
 	size_t alloc_size, alloc_len;
 	void *virt_ptr;
 	dma_addr_t paddr;

 	alloc_len = sizeof(struct vsem_data_packet) * MAX_VSEM_NUM;
 	alloc_size = (alloc_len + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);

 	virt_ptr = kmalloc(alloc_size, GFP_KERNEL | GFP_DMA);
 	if (virt_ptr == NULL)
 		return;

 	of_dma_configure(hdev->hdtx_dev, NULL);
 	paddr = dma_map_single(hdev->hdtx_dev,
 		virt_ptr, alloc_size, DMA_TO_DEVICE);
 	if (dma_mapping_error(hdev->hdtx_dev, paddr)) {
 		pr_info("dma_map_single() failed\n");
 		kfree(virt_ptr);
 		return;
 	}

 	dv_emp_cfg_val.hdev = hdev;
 	dv_emp_cfg_val.p_pkts = (struct vsem_data_packet *)virt_ptr;
 	dv_emp_cfg_val.pkts_phy_addr = paddr;
 	dv_emp_cfg_val.size = alloc_size;
 	dv_emp_cfg_val.send_vsemds = send_dv_emp;
 }
	/*
	* drivers/amlogic/media/vout/hdmitx/hdmi_tx_20/dv_emp_vsem.c
	*
	* Copyright (C) 2017 Amlogic, Inc. All rights reserved.
	*
	* 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.
	*
	*/

	#include <asm/cacheflush.h>
	#include <linux/version.h>
	#include <linux/module.h>
	#include <linux/types.h>
	#include <linux/kernel.h>
	#include <linux/kthread.h>
	#include <linux/delay.h>
	#include <linux/interrupt.h>
	#include <linux/fs.h>
	#include <linux/slab.h>
	#include <linux/init.h>
	#include <linux/device.h>
	#include <linux/mm.h>
	#include <linux/major.h>
	#include <linux/dma-mapping.h>
	#include <linux/platform_device.h>
	#include <linux/pinctrl/consumer.h>
	#include <linux/mutex.h>
	#include <linux/cdev.h>
	#include <linux/ctype.h>
	#include <linux/extcon.h>
	#include <linux/proc_fs.h>
	#include <linux/uaccess.h>
	#include <linux/workqueue.h>
	#include <linux/input.h>
	#include <linux/irq.h>
	#include <linux/io.h>
	#include <linux/of.h>
	#include <linux/of_platform.h>
	#include <linux/of_address.h>
	#include <linux/reboot.h>
	#include <linux/extcon.h>
	#include <linux/i2c.h>
	#include <linux/amlogic/media/vout/hdmi_tx/hdmi_tx_module.h>
	#include "./hw/hdmi_tx_reg.h"

	#include "dv_emp_vsem.h"

	#undef pr_fmt
	#define pr_fmt(fmt) "dvemp: " fmt

	static unsigned int crc32_lut[256] = {
	0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
	0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
	0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
	0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
	0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
	0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
	0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef,
	0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
	0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,
	0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
	0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,
	0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
	0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4,
	0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
	0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
	0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
	0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc,
	0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
	0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050,
	0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
	0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
	0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
	0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1,
	0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
	0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,
	0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
	0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,
	0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
	0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd,
	0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
	0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,
	0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
	0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,
	0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
	0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,
	0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
	0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a,
	0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
	0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,
	0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
	0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,
	0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
	0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
	};

	void SetByteField(unsigned char *meta_byte,
	unsigned char field_value,
	unsigned char field_mask)
	{
	unsigned int count;
	unsigned int test_val;
	unsigned int set_val;
	unsigned char test_mask;

	test_mask = field_mask;
	count = 0;
	while ((test_mask > 0) && (count < 8)) {
	test_val = 1 << count;
	if ((test_val & field_mask) == test_val) {
	set_val = (field_value & 1);
	field_value >>= 1;
	if (set_val > 0)
	*meta_byte \|= 1 << count;
	else
	*meta_byte &= ~(1 << count);
	test_mask &= ~(1 << count);
	}
	count++;
	}
	}

	/* given metadata length, figure out how many packets are needed */
	unsigned int vsem_get_num_packets(unsigned int metadata_len,
	unsigned int *last_packet_len)
	{
	unsigned int num_packets = 1;

	if (metadata_len == 0)
	return 0;

	/* how many packets are needed */
	*last_packet_len = metadata_len;
	if (*last_packet_len > VSEM_FIRST_PACKET_EDR_DATA_LEN) {
	*last_packet_len -= VSEM_FIRST_PACKET_EDR_DATA_LEN;
	while (*last_packet_len > VSEM_PACKET_BODY_LEN) {
	*last_packet_len -= VSEM_PACKET_BODY_LEN;
	num_packets++;
	}
	if (*last_packet_len > 0)
	num_packets++;
	}

	return num_packets;
	}

	unsigned int crc32(unsigned int crc, const void *buf, unsigned int size)
	{
	const unsigned char p = (unsigned char )buf;

	crc = ~crc;
	while (size) {
	crc = (crc << 8) ^ crc32_lut[((crc >> 24) ^ *p) & 0xff];
	p++;
	size--;
	}

	return crc;
	}

	static int pack_vsemds(struct emp_edr_config *pconfig,
	unsigned char *p_metadata,
	int metadata_len,
	unsigned char data_version)
	{
	struct vsem_data_packet *cur_packet;
	int count, acrc_loc, frt_loc;
	unsigned int p;
	unsigned int num_packets = 1;
	unsigned int last_packet_len = 0;
	unsigned int cur_packet_len;
	unsigned int crc;
	unsigned int edr_data_len;
	unsigned char pcrc, pcrcfrt, acrc[4];
	unsigned char PB0;
	unsigned char HB1;

	edr_data_len = metadata_len + VSEM_CRC_LENGTH;
	pcrcfrt = NULL;
	/* how many packets are needed */
	num_packets = vsem_get_num_packets(edr_data_len, &last_packet_len);
	if (num_packets > MAX_VSEM_NUM)
	pr_info("vsem metada_len is too big\n");

	/* allocate packets memory */
	pconfig->num_packets = num_packets;
	if (pconfig->vsem_packets == NULL) {
	pr_info("vsem_packets don't alloc\n");
	return -1;
	}

	memset(pconfig->vsem_packets, 0,
	sizeof(struct vsem_data_packet) * num_packets);

	/compute CRC/
	crc = crc32(0, p_metadata, metadata_len);

	/* process the first packet */
	p = 0;
	cur_packet = &pconfig->vsem_packets[p];
	pcrc = cur_packet->PB;
	cur_packet->packet_type = 0x7F;
	HB1 = 0;
	SetByteField(&HB1, 1, FIELD_MASK_FIRST);
	SetByteField(&HB1, 0, FIELD_MASK_LAST);
	cur_packet->HB1 = HB1;
	cur_packet->sequence_index = p;
	edr_data_len += 6; /* PB0~12 */
	PB0 = 0;
	SetByteField(&PB0, 1, FIELD_MASK_NEW);
	SetByteField(&PB0, 1, FIELD_MASK_END);
	SetByteField(&PB0, 2, FIELD_MASK_DS_TYPE);
	SetByteField(&PB0, 1, FIELD_MASK_AFR);
	SetByteField(&PB0, 1, FIELD_MASK_VFR);
	SetByteField(&PB0, 1, FIELD_MASK_SYNC);
	cur_packet->PB[0] = PB0;
	cur_packet->PB[1] = 0x00; /* Reserved */
	cur_packet->PB[2] = 0x00; /* Organization ID */
	cur_packet->PB[3] = 0x00; /* Data Set Tag hi = 0 */
	cur_packet->PB[4] = 0x00; /* Data Set Tag low = 0 */
	cur_packet->PB[5] = edr_data_len >> 8; /* Data Set Length hi */
	cur_packet->PB[6] = edr_data_len & 0xff; /* Data Set Length low */
	cur_packet->PB[7] = 0x46; /* MD0 */
	cur_packet->PB[8] = 0xD0; /* MD1 */
	cur_packet->PB[9] = 0x00; /* MD2 */
	cur_packet->PB[10] = data_version; /* data_version */
	cur_packet->PB[11] = 0x00; /* Reserved */
	cur_packet->PB[12] = 0x00; /* Reserved */
	cur_packet_len = VSEM_FIRST_PACKET_EDR_DATA_LEN;
	if (cur_packet_len > metadata_len)
	cur_packet_len = metadata_len;
	memcpy(&cur_packet->PB[13], p_metadata, cur_packet_len);
	pcrc = &cur_packet->PB[13];
	p_metadata += cur_packet_len;
	metadata_len -= cur_packet_len;
	num_packets--;
	p++;
	/* process following packets */
	while (num_packets > 0) {
	if (p == 1)
	frt_loc = 13 + cur_packet_len - 1;
	else
	frt_loc = cur_packet_len - 1;
	pcrcfrt =
	&pconfig->vsem_packets[p - 1].PB[frt_loc];
	cur_packet = &pconfig->vsem_packets[p];
	cur_packet->packet_type = 0x7F;
	HB1 = 0x00;
	SetByteField(&HB1, 0, FIELD_MASK_FIRST);
	if (num_packets == 1) {
	SetByteField(&HB1, 1, FIELD_MASK_LAST);
	cur_packet_len = last_packet_len;
	} else {
	SetByteField(&HB1, 0, FIELD_MASK_LAST);
	cur_packet_len = VSEM_PACKET_BODY_LEN;
	}
	cur_packet->HB1 = HB1;
	cur_packet->sequence_index = (unsigned char)p;
	if (metadata_len > 0) {
	if (metadata_len >= cur_packet_len) {
	memcpy(cur_packet->PB, p_metadata, cur_packet_len);
	metadata_len -= cur_packet_len;
	p_metadata += cur_packet_len;
	} else {
	memcpy(cur_packet->PB, p_metadata, metadata_len);
	p_metadata += metadata_len;
	metadata_len = 0;
	}
	}
	pcrc = &cur_packet->PB[0];
	num_packets--;
	p++;
	}
	/write CRC/
	acrc[0] = (crc & 0xff000000) >> 24;
	acrc[1] = (crc & 0xff0000) >> 16;
	acrc[2] = (crc & 0xff00) >> 8;
	acrc[3] = crc & 0xff;
	if (last_packet_len >= VSEM_CRC_LENGTH) {
	pcrc += last_packet_len - VSEM_CRC_LENGTH;
	for (count = 0; count < 4; count++) {
	pcrc[count] = acrc[count];
	}
	} else {
	if (pcrcfrt != NULL) {
	/last packet/
	pcrc = &cur_packet->PB[0];
	for (count = last_packet_len - 1;
	count >= 0;
	count--) {
	/VSEM_CRC_LENGTH - 1 - (last_packet_len - 1 - count)/
	acrc_loc = VSEM_CRC_LENGTH - last_packet_len + count;
	pcrc[count] = acrc[acrc_loc];
	}
	/the packet before last packet/
	pcrcfrt -= VSEM_CRC_LENGTH - last_packet_len;
	pcrcfrt++;
	for (count = 0;
	count < VSEM_CRC_LENGTH - last_packet_len;
	count++) {
	pcrcfrt[count] = acrc[count];
	}
	}
	}
	return 0;
	}

	static struct dv_emp_hdmi_cfg dv_emp_cfg_val;
	static void hdmitx_set_dv_emp_pkt(struct emp_edr_config *pconfig)
	{
	struct hdmitx_dev *hdev;

	hdev = dv_emp_cfg_val.hdev;
	hdev->hwop.cntlconfig(hdev, CONF_EMP_PHY_ADDR, pconfig->phys_ptr);
	hdev->hwop.cntlconfig(hdev, CONF_EMP_NUMBER, pconfig->num_packets);
	}

	static void hdmitx_disable_dv_emp_pkt(void)
	{
	struct hdmitx_dev *hdev;

	hdev = dv_emp_cfg_val.hdev;
	hdev->hwop.cntlconfig(hdev, CONF_EMP_NUMBER, 0);
	}

	static void hdmitx_emp_dv_infoframe(struct hdmitx_dev *hdev,
	enum eotf_type type,
	enum eotf_type type_save,
	bool signal_sdr)
	{
	if ((type == EOTF_T_DOLBYVISION) &&
	(type != type_save)) {
	pr_info("%s: T_Dolby Vision enter\n", __func__);
	/first disable drm package/
	hdev->hwop.setpacket(HDMI_PACKET_DRM,
	NULL, NULL);
	hdev->hwop.cntlconfig(hdev, CONF_AVI_BT2020,
	CLR_AVI_BT2020);/BT709/
	hdev->hwop.cntlconfig(hdev,
	CONF_AVI_RGBYCC_INDIC,
	COLORSPACE_RGB444);
	hdev->hwop.cntlconfig(hdev, CONF_AVI_Q01,
	RGB_RANGE_FUL);
	}
	if ((type == EOTF_T_LL_MODE) &&
	(type != type_save)) {
	pr_info("%s: Dolby Vision LL enter\n", __func__);
	/first disable drm package/
	hdev->hwop.setpacket(HDMI_PACKET_DRM,
	NULL, NULL);
	if (hdev->rxcap.colorimetry_data & 0xe0)
	/if RX support BT2020, then output BT2020/
	hdev->hwop.cntlconfig(hdev, CONF_AVI_BT2020,
	SET_AVI_BT2020);/BT2020/
	else
	hdev->hwop.cntlconfig(hdev, CONF_AVI_BT2020,
	CLR_AVI_BT2020);/BT709/
	hdev->hwop.cntlconfig(hdev,
	CONF_AVI_RGBYCC_INDIC,
	COLORSPACE_YUV422);
	hdev->hwop.cntlconfig(hdev, CONF_AVI_YQ01,
	YCC_RANGE_LIM);
	}
	if ((type != EOTF_T_DOLBYVISION) &&
	(type != EOTF_T_LL_MODE) &&
	(signal_sdr == true)) {
	pr_info("%s: Dolby Vision exit\n", __func__);
	update_current_para(hdev);
	hdev->hwop.cntlconfig(hdev,
	CONF_AVI_RGBYCC_INDIC, hdev->para->cs);
	hdev->hwop.cntlconfig(hdev,
	CONF_AVI_Q01, RGB_RANGE_DEFAULT);
	hdev->hwop.cntlconfig(hdev,
	CONF_AVI_YQ01, YCC_RANGE_LIM);
	hdev->hwop.cntlconfig(hdev, CONF_AVI_BT2020,
	CLR_AVI_BT2020);/BT709/
	}
	}

	int send_dv_emp(enum eotf_type type,
	enum mode_type tunnel_mode,
	struct dv_vsif_para *vsif_data,
	unsigned char *p_vsem,
	int vsem_len,
	bool signal_sdr)
	{
	struct emp_edr_config config;
	int rv;
	struct hdmitx_dev *hdev = dv_emp_cfg_val.hdev;
	unsigned char data_version = 0;
	static enum eotf_type type_save = EOTF_T_NULL;
	static bool vsem_flag = false;

	if (!hdev) {
	pr_info("EMP hdmitx: no device\n");
	return -1;
	}

	if ((hdev->chip_type) < MESON_CPU_ID_GXL) {
	pr_info("EMP hdmitx: not support DolbyVision\n");
	return -1;
	}
	if ((hdev->ready == 0) \|\|
	(hdev->rxcap.dv_info.ieeeoui != DV_IEEE_OUI)) {
	return -1;
	}

	if (hdr_status_pos != 2)
	pr_info("EMP hdmitx_set_vsif_pkt: type = %d\n", type);
	hdr_status_pos = 2;
	hdev->hdmi_current_eotf_type = type;
	hdmitx_emp_dv_infoframe(hdev, type, type_save, signal_sdr);
	type_save = type;
	if ((type != EOTF_T_DOLBYVISION) &&
	(type != EOTF_T_LL_MODE)) {
	if (vsem_flag == true) { /exit from Dolby VS-EMDS/
	hdmitx_disable_dv_emp_pkt();
	} else { /exit from Dolby VSIF/
	hdmitx_set_vsif_pkt(type, tunnel_mode, vsif_data, signal_sdr);
	}
	hdev->dv_src_feature = 0;
	vsem_flag = false;
	pr_info("EMP hdmitx_set_vsif_pkt: stop\n");
	return 1;
	}
	hdev->dv_src_feature = 1;
	if (p_vsem) { /Dolby VS-EMDS/
	vsem_flag = true;
	if (type == EOTF_T_DOLBYVISION)
	data_version = 0;
	else
	data_version = 1;

	dma_sync_single_for_cpu(
	hdev->hdtx_dev,
	dv_emp_cfg_val.pkts_phy_addr,
	dv_emp_cfg_val.size,
	DMA_TO_DEVICE);
	config.num_packets = 0;
	config.phys_ptr = dv_emp_cfg_val.pkts_phy_addr;
	config.vsem_packets = dv_emp_cfg_val.p_pkts;
	rv = pack_vsemds(&config, p_vsem, vsem_len, data_version);
	if (rv != 0) {
	pr_info("pack_vsem fail!\n");
	return -1;
	}
	/Disable Dolby VSIF send/
	hdev->hwop.setpacket(HDMI_PACKET_VEND, NULL, NULL);
	/Enable Dolby VS-EMDS send/
	dma_sync_single_for_device(
	hdev->hdtx_dev,
	dv_emp_cfg_val.pkts_phy_addr,
	dv_emp_cfg_val.size,
	DMA_TO_DEVICE);
	hdmitx_set_dv_emp_pkt(&config);
	} else { /Dolby VSIF or HDMI 14b VSIF/
	vsem_flag = false;
	/Disable Dolby VS-EMDS send/
	hdmitx_disable_dv_emp_pkt();
	/Enable Dolby VSIF send/
	hdmitx_set_vsif_pkt(type, tunnel_mode, vsif_data, signal_sdr);
	}
	return 1;
	}
	EXPORT_SYMBOL(send_dv_emp);

	void vsem_init_cfg(struct hdmitx_dev *hdev)
	{
	size_t alloc_size, alloc_len;
	void *virt_ptr;
	dma_addr_t paddr;

	alloc_len = sizeof(struct vsem_data_packet) * MAX_VSEM_NUM;
	alloc_size = (alloc_len + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);

	virt_ptr = kmalloc(alloc_size, GFP_KERNEL \| GFP_DMA);
	if (virt_ptr == NULL)
	return;

	of_dma_configure(hdev->hdtx_dev, NULL);
	paddr = dma_map_single(hdev->hdtx_dev,
	virt_ptr, alloc_size, DMA_TO_DEVICE);
	if (dma_mapping_error(hdev->hdtx_dev, paddr)) {
	pr_info("dma_map_single() failed\n");
	kfree(virt_ptr);
	return;
	}

	dv_emp_cfg_val.hdev = hdev;
	dv_emp_cfg_val.p_pkts = (struct vsem_data_packet *)virt_ptr;
	dv_emp_cfg_val.pkts_phy_addr = paddr;
	dv_emp_cfg_val.size = alloc_size;
	dv_emp_cfg_val.send_vsemds = send_dv_emp;
	}