Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index de73778..9b6336a 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  *  linux/include/linux/mmc/card.h
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  *  Card driver specific definitions.
  */
 #ifndef LINUX_MMC_CARD_H
@@ -133,6 +130,8 @@
 struct sd_scr {
 	unsigned char		sda_vsn;
 	unsigned char		sda_spec3;
+	unsigned char		sda_spec4;
+	unsigned char		sda_specx;
 	unsigned char		bus_widths;
 #define SD_SCR_BUS_WIDTH_1	(1<<0)
 #define SD_SCR_BUS_WIDTH_4	(1<<2)
@@ -277,6 +276,7 @@
  	unsigned int		erase_shift;	/* if erase unit is power 2 */
  	unsigned int		pref_erase;	/* in sectors */
 	unsigned int		eg_boundary;	/* don't cross erase-group boundaries */
+	unsigned int		erase_arg;	/* erase / trim / discard */
  	u8			erased_byte;	/* value of erased bytes */
 
 	u32			raw_cid[4];	/* raw card CID */
@@ -308,6 +308,7 @@
 	unsigned int    nr_parts;
 
 	unsigned int		bouncesz;	/* Bounce buffer size */
+	struct workqueue_struct *complete_wq;	/* Private workqueue */
 };
 
 static inline bool mmc_large_sector(struct mmc_card *card)
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 134a648..b7ba881 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -1,9 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  *  linux/include/linux/mmc/core.h
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 #ifndef LINUX_MMC_CORE_H
 #define LINUX_MMC_CORE_H
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index beed712..ba70338 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  *  linux/include/linux/mmc/host.h
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  *  Host driver specific definitions.
  */
 #ifndef LINUX_MMC_HOST_H
@@ -131,6 +128,7 @@
 	int	(*get_cd)(struct mmc_host *host);
 
 	void	(*enable_sdio_irq)(struct mmc_host *host, int enable);
+	/* Mandatory callback when using MMC_CAP2_SDIO_IRQ_NOTHREAD. */
 	void	(*ack_sdio_irq)(struct mmc_host *host);
 
 	/* optional callback for HC quirks */
@@ -147,6 +145,9 @@
 	/* Prepare HS400 target operating frequency depending host driver */
 	int	(*prepare_hs400_tuning)(struct mmc_host *host, struct mmc_ios *ios);
 
+	/* Prepare switch to DDR during the HS400 init sequence */
+	int	(*hs400_prepare_ddr)(struct mmc_host *host);
+
 	/* Prepare for switching from HS400 to HS200 */
 	void	(*hs400_downgrade)(struct mmc_host *host);
 
@@ -331,7 +332,7 @@
 #define MMC_CAP_UHS		(MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | \
 				 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | \
 				 MMC_CAP_UHS_DDR50)
-/* (1 << 21) is free for reuse */
+#define MMC_CAP_SYNC_RUNTIME_PM	(1 << 21)	/* Synced runtime PM suspends. */
 #define MMC_CAP_DRIVER_TYPE_A	(1 << 23)	/* Host supports Driver Type A */
 #define MMC_CAP_DRIVER_TYPE_C	(1 << 24)	/* Host supports Driver Type C */
 #define MMC_CAP_DRIVER_TYPE_D	(1 << 25)	/* Host supports Driver Type D */
@@ -367,6 +368,7 @@
 #define MMC_CAP2_CQE		(1 << 23)	/* Has eMMC command queue engine */
 #define MMC_CAP2_CQE_DCMD	(1 << 24)	/* CQE can issue a direct command */
 #define MMC_CAP2_AVOID_3_3V	(1 << 25)	/* Host must negotiate down from 3.3V */
+#define MMC_CAP2_MERGE_CAPABLE	(1 << 26)	/* Host can merge a segment over the segment size */
 
 	int			fixed_drv_type;	/* fixed driver type for non-removable media */
 
@@ -395,6 +397,8 @@
 	unsigned int		retune_now:1;	/* do re-tuning at next req */
 	unsigned int		retune_paused:1; /* re-tuning is temporarily disabled */
 	unsigned int		use_blk_mq:1;	/* use blk-mq */
+	unsigned int		retune_crc_disable:1; /* don't trigger retune upon crc */
+	unsigned int		can_dma_map_merge:1; /* merging can be used */
 
 	int			rescan_disable;	/* disable card detection */
 	int			rescan_entered;	/* used with nonremovable devices */
@@ -475,6 +479,11 @@
 	return (void *)host->private;
 }
 
+static inline struct mmc_host *mmc_from_priv(void *priv)
+{
+	return container_of(priv, struct mmc_host, private);
+}
+
 #define mmc_host_is_spi(host)	((host)->caps & MMC_CAP_SPI)
 
 #define mmc_dev(x)	((x)->parent)
@@ -487,6 +496,15 @@
 
 void mmc_cqe_request_done(struct mmc_host *host, struct mmc_request *mrq);
 
+/*
+ * May be called from host driver's system/runtime suspend/resume callbacks,
+ * to know if SDIO IRQs has been claimed.
+ */
+static inline bool sdio_irq_claimed(struct mmc_host *host)
+{
+	return host->sdio_irqs > 0;
+}
+
 static inline void mmc_signal_sdio_irq(struct mmc_host *host)
 {
 	host->ops->enable_sdio_irq(host, 0);
@@ -495,21 +513,14 @@
 		wake_up_process(host->sdio_irq_thread);
 }
 
-void sdio_run_irqs(struct mmc_host *host);
 void sdio_signal_irq(struct mmc_host *host);
 
 #ifdef CONFIG_REGULATOR
-int mmc_regulator_get_ocrmask(struct regulator *supply);
 int mmc_regulator_set_ocr(struct mmc_host *mmc,
 			struct regulator *supply,
 			unsigned short vdd_bit);
 int mmc_regulator_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios);
 #else
-static inline int mmc_regulator_get_ocrmask(struct regulator *supply)
-{
-	return 0;
-}
-
 static inline int mmc_regulator_set_ocr(struct mmc_host *mmc,
 				 struct regulator *supply,
 				 unsigned short vdd_bit)
@@ -524,7 +535,6 @@
 }
 #endif
 
-u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max);
 int mmc_regulator_get_supply(struct mmc_host *mmc);
 
 static inline int mmc_card_is_removable(struct mmc_host *host)
@@ -569,6 +579,11 @@
 	return host->can_retune == 1;
 }
 
+static inline bool mmc_doing_retune(struct mmc_host *host)
+{
+	return host->doing_retune == 1;
+}
+
 static inline enum dma_data_direction mmc_get_dma_dir(struct mmc_data *data)
 {
 	return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
diff --git a/include/linux/mmc/pm.h b/include/linux/mmc/pm.h
index 4a13920..3549f80 100644
--- a/include/linux/mmc/pm.h
+++ b/include/linux/mmc/pm.h
@@ -1,12 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * linux/include/linux/mmc/pm.h
  *
  * Author:	Nicolas Pitre
  * Copyright:	(C) 2009 Marvell Technology Group Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #ifndef LINUX_MMC_PM_H
diff --git a/include/linux/mmc/sd.h b/include/linux/mmc/sd.h
index 1ebcf9b..2236aa5 100644
--- a/include/linux/mmc/sd.h
+++ b/include/linux/mmc/sd.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *  include/linux/mmc/sd.h
  *
  *  Copyright (C) 2005-2007 Pierre Ossman, 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.
  */
 
 #ifndef LINUX_MMC_SD_H
@@ -91,4 +87,10 @@
 #define SD_SWITCH_ACCESS_DEF	0
 #define SD_SWITCH_ACCESS_HS	1
 
+/*
+ * Erase/discard
+ */
+#define SD_ERASE_ARG			0x00000000
+#define SD_DISCARD_ARG			0x00000001
+
 #endif /* LINUX_MMC_SD_H */
diff --git a/include/linux/mmc/sdio.h b/include/linux/mmc/sdio.h
index 17446d3..e287699 100644
--- a/include/linux/mmc/sdio.h
+++ b/include/linux/mmc/sdio.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *  include/linux/mmc/sdio.h
  *
  *  Copyright 2006-2007 Pierre Ossman
- *
- * 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.
  */
 
 #ifndef LINUX_MMC_SDIO_H
diff --git a/include/linux/mmc/sdio_func.h b/include/linux/mmc/sdio_func.h
index 97ca105..5a177f7 100644
--- a/include/linux/mmc/sdio_func.h
+++ b/include/linux/mmc/sdio_func.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *  include/linux/mmc/sdio_func.h
  *
  *  Copyright 2007-2008 Pierre Ossman
- *
- * 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.
  */
 
 #ifndef LINUX_MMC_SDIO_FUNC_H
@@ -111,6 +107,18 @@
 extern int sdio_register_driver(struct sdio_driver *);
 extern void sdio_unregister_driver(struct sdio_driver *);
 
+/**
+ * module_sdio_driver() - Helper macro for registering a SDIO driver
+ * @__sdio_driver: sdio_driver struct
+ *
+ * Helper macro for SDIO drivers which do not do anything special in module
+ * init/exit. This eliminates a lot of boilerplate. Each module may only
+ * use this macro once, and calling it replaces module_init() and module_exit()
+ */
+#define module_sdio_driver(__sdio_driver) \
+	module_driver(__sdio_driver, sdio_register_driver, \
+		      sdio_unregister_driver)
+
 /*
  * SDIO I/O operations
  */
@@ -159,4 +167,10 @@
 extern mmc_pm_flag_t sdio_get_host_pm_caps(struct sdio_func *func);
 extern int sdio_set_host_pm_flags(struct sdio_func *func, mmc_pm_flag_t flags);
 
+extern void sdio_retune_crc_disable(struct sdio_func *func);
+extern void sdio_retune_crc_enable(struct sdio_func *func);
+
+extern void sdio_retune_hold_now(struct sdio_func *func);
+extern void sdio_retune_release(struct sdio_func *func);
+
 #endif /* LINUX_MMC_SDIO_FUNC_H */
diff --git a/include/linux/mmc/sdio_ids.h b/include/linux/mmc/sdio_ids.h
index 4224902..d1a5d5d 100644
--- a/include/linux/mmc/sdio_ids.h
+++ b/include/linux/mmc/sdio_ids.h
@@ -42,6 +42,7 @@
 #define SDIO_DEVICE_ID_BROADCOM_4354		0x4354
 #define SDIO_DEVICE_ID_BROADCOM_4356		0x4356
 #define SDIO_DEVICE_ID_CYPRESS_4373		0x4373
+#define SDIO_DEVICE_ID_CYPRESS_43012		43012
 
 #define SDIO_VENDOR_ID_INTEL			0x0089
 #define SDIO_DEVICE_ID_INTEL_IWMC3200WIMAX	0x1402
@@ -58,6 +59,8 @@
 #define SDIO_DEVICE_ID_MARVELL_8797_F0		0x9128
 #define SDIO_DEVICE_ID_MARVELL_8887WLAN	0x9134
 
+#define SDIO_VENDOR_ID_MEDIATEK			0x037a
+
 #define SDIO_VENDOR_ID_SIANO			0x039a
 #define SDIO_DEVICE_ID_SIANO_NOVA_B0		0x0201
 #define SDIO_DEVICE_ID_SIANO_NICE		0x0202
diff --git a/include/linux/mmc/sh_mmcif.h b/include/linux/mmc/sh_mmcif.h
index a7baa29..e25533b 100644
--- a/include/linux/mmc/sh_mmcif.h
+++ b/include/linux/mmc/sh_mmcif.h
@@ -1,14 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * include/linux/mmc/sh_mmcif.h
  *
  * platform data for eMMC driver
  *
  * Copyright (C) 2010 Renesas Solutions Corp.
- *
- * 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.
- *
  */
 
 #ifndef LINUX_MMC_SH_MMCIF_H
diff --git a/include/linux/mmc/slot-gpio.h b/include/linux/mmc/slot-gpio.h
index 06607c5..0de3d7c 100644
--- a/include/linux/mmc/slot-gpio.h
+++ b/include/linux/mmc/slot-gpio.h
@@ -1,11 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Generic GPIO card-detect helper header
  *
  * Copyright (C) 2011, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #ifndef MMC_SLOT_GPIO_H
@@ -17,17 +14,12 @@
 struct mmc_host;
 
 int mmc_gpio_get_ro(struct mmc_host *host);
-int mmc_gpio_request_ro(struct mmc_host *host, unsigned int gpio);
-
 int mmc_gpio_get_cd(struct mmc_host *host);
-int mmc_gpio_request_cd(struct mmc_host *host, unsigned int gpio,
-			unsigned int debounce);
-
 int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id,
 			 unsigned int idx, bool override_active_level,
 			 unsigned int debounce, bool *gpio_invert);
 int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id,
-			 unsigned int idx, bool override_active_level,
+			 unsigned int idx,
 			 unsigned int debounce, bool *gpio_invert);
 void mmc_gpio_set_cd_isr(struct mmc_host *host,
 			 irqreturn_t (*isr)(int irq, void *dev_id));