Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Open Menu / drivers / spi / spi-bcm-qspi.h
Loading...
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright 2016 Broadcom
 */

#ifndef __SPI_BCM_QSPI_H__
#define __SPI_BCM_QSPI_H__

#include <linux/types.h>
#include <linux/io.h>

/* BSPI interrupt masks */
#define INTR_BSPI_LR_OVERREAD_MASK		BIT(4)
#define INTR_BSPI_LR_SESSION_DONE_MASK		BIT(3)
#define INTR_BSPI_LR_IMPATIENT_MASK		BIT(2)
#define INTR_BSPI_LR_SESSION_ABORTED_MASK	BIT(1)
#define INTR_BSPI_LR_FULLNESS_REACHED_MASK	BIT(0)

#define BSPI_LR_INTERRUPTS_DATA		       \
	(INTR_BSPI_LR_SESSION_DONE_MASK |	       \
	 INTR_BSPI_LR_FULLNESS_REACHED_MASK)

#define BSPI_LR_INTERRUPTS_ERROR               \
	(INTR_BSPI_LR_OVERREAD_MASK |	       \
	 INTR_BSPI_LR_IMPATIENT_MASK |	       \
	 INTR_BSPI_LR_SESSION_ABORTED_MASK)

#define BSPI_LR_INTERRUPTS_ALL                 \
	(BSPI_LR_INTERRUPTS_ERROR |	       \
	 BSPI_LR_INTERRUPTS_DATA)

/* MSPI Interrupt masks */
#define INTR_MSPI_HALTED_MASK			BIT(6)
#define INTR_MSPI_DONE_MASK			BIT(5)

#define MSPI_INTERRUPTS_ALL		       \
	(INTR_MSPI_DONE_MASK |		       \
	 INTR_MSPI_HALTED_MASK)

#define QSPI_INTERRUPTS_ALL                    \
	(MSPI_INTERRUPTS_ALL |		       \
	 BSPI_LR_INTERRUPTS_ALL)

struct platform_device;
struct dev_pm_ops;

enum {
	MSPI_DONE = 0x1,
	BSPI_DONE = 0x2,
	BSPI_ERR = 0x4,
	MSPI_BSPI_DONE = 0x7
};

struct bcm_qspi_soc_intc {
	void (*bcm_qspi_int_ack)(struct bcm_qspi_soc_intc *soc_intc, int type);
	void (*bcm_qspi_int_set)(struct bcm_qspi_soc_intc *soc_intc, int type,
				 bool en);
	u32 (*bcm_qspi_get_int_status)(struct bcm_qspi_soc_intc *soc_intc);
};

/* Read controller register*/
static inline u32 bcm_qspi_readl(bool be, void __iomem *addr)
{
	if (be)
		return ioread32be(addr);
	else
		return readl_relaxed(addr);
}

/* Write controller register*/
static inline void bcm_qspi_writel(bool be,
				   unsigned int data, void __iomem *addr)
{
	if (be)
		iowrite32be(data, addr);
	else
		writel_relaxed(data, addr);
}

static inline u32 get_qspi_mask(int type)
{
	switch (type) {
	case MSPI_DONE:
		return INTR_MSPI_DONE_MASK;
	case BSPI_DONE:
		return BSPI_LR_INTERRUPTS_ALL;
	case MSPI_BSPI_DONE:
		return QSPI_INTERRUPTS_ALL;
	case BSPI_ERR:
		return BSPI_LR_INTERRUPTS_ERROR;
	}

	return 0;
}

/* The common driver functions to be called by the SoC platform driver */
int bcm_qspi_probe(struct platform_device *pdev,
		   struct bcm_qspi_soc_intc *soc_intc);
void bcm_qspi_remove(struct platform_device *pdev);

/* pm_ops used by the SoC platform driver called on PM suspend/resume */
extern const struct dev_pm_ops bcm_qspi_pm_ops;

#endif /* __SPI_BCM_QSPI_H__ */