1 files changed, 132 insertions, 0 deletions
diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h
new file mode 100644
index 0000000000..45cdbbc71c
--- /dev/null
+++ b/drivers/spi/spi-pxa2xx.h
@@ -0,0 +1,132 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2005 Stephen Street / StreetFire Sound Labs
+ * Copyright (C) 2013, 2021 Intel Corporation
+ */
+
+#ifndef SPI_PXA2XX_H
+#define SPI_PXA2XX_H
+
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/types.h>
+#include <linux/sizes.h>
+
+#include <linux/pxa2xx_ssp.h>
+
+struct gpio_desc;
+struct pxa2xx_spi_controller;
+struct spi_controller;
+struct spi_device;
+struct spi_transfer;
+
+struct driver_data {
+	/* SSP Info */
+	struct ssp_device *ssp;
+
+	/* SPI framework hookup */
+	enum pxa_ssp_type ssp_type;
+	struct spi_controller *controller;
+
+	/* PXA hookup */
+	struct pxa2xx_spi_controller *controller_info;
+
+	/* SSP masks*/
+	u32 dma_cr1;
+	u32 int_cr1;
+	u32 clear_sr;
+	u32 mask_sr;
+
+	/* DMA engine support */
+	atomic_t dma_running;
+
+	/* Current transfer state info */
+	void *tx;
+	void *tx_end;
+	void *rx;
+	void *rx_end;
+	u8 n_bytes;
+	int (*write)(struct driver_data *drv_data);
+	int (*read)(struct driver_data *drv_data);
+	irqreturn_t (*transfer_handler)(struct driver_data *drv_data);
+
+	void __iomem *lpss_base;
+
+	/* Optional slave FIFO ready signal */
+	struct gpio_desc *gpiod_ready;
+};
+
+struct chip_data {
+	u32 cr1;
+	u32 dds_rate;
+	u32 timeout;
+	u8 enable_dma;
+	u32 dma_burst_size;
+	u32 dma_threshold;
+	u32 threshold;
+	u16 lpss_rx_threshold;
+	u16 lpss_tx_threshold;
+};
+
+static inline u32 pxa2xx_spi_read(const struct driver_data *drv_data, u32 reg)
+{
+	return pxa_ssp_read_reg(drv_data->ssp, reg);
+}
+
+static inline void pxa2xx_spi_write(const struct driver_data *drv_data, u32 reg, u32 val)
+{
+	pxa_ssp_write_reg(drv_data->ssp, reg, val);
+}
+
+#define DMA_ALIGNMENT		8
+
+static inline int pxa25x_ssp_comp(const struct driver_data *drv_data)
+{
+	switch (drv_data->ssp_type) {
+	case PXA25x_SSP:
+	case CE4100_SSP:
+	case QUARK_X1000_SSP:
+		return 1;
+	default:
+		return 0;
+	}
+}
+
+static inline void clear_SSCR1_bits(const struct driver_data *drv_data, u32 bits)
+{
+	pxa2xx_spi_write(drv_data, SSCR1, pxa2xx_spi_read(drv_data, SSCR1) & ~bits);
+}
+
+static inline u32 read_SSSR_bits(const struct driver_data *drv_data, u32 bits)
+{
+	return pxa2xx_spi_read(drv_data, SSSR) & bits;
+}
+
+static inline void write_SSSR_CS(const struct driver_data *drv_data, u32 val)
+{
+	if (drv_data->ssp_type == CE4100_SSP ||
+	    drv_data->ssp_type == QUARK_X1000_SSP)
+		val |= read_SSSR_bits(drv_data, SSSR_ALT_FRM_MASK);
+
+	pxa2xx_spi_write(drv_data, SSSR, val);
+}
+
+extern int pxa2xx_spi_flush(struct driver_data *drv_data);
+
+#define MAX_DMA_LEN		SZ_64K
+#define DEFAULT_DMA_CR1		(SSCR1_TSRE | SSCR1_RSRE | SSCR1_TRAIL)
+
+extern irqreturn_t pxa2xx_spi_dma_transfer(struct driver_data *drv_data);
+extern int pxa2xx_spi_dma_prepare(struct driver_data *drv_data,
+				  struct spi_transfer *xfer);
+extern void pxa2xx_spi_dma_start(struct driver_data *drv_data);
+extern void pxa2xx_spi_dma_stop(struct driver_data *drv_data);
+extern int pxa2xx_spi_dma_setup(struct driver_data *drv_data);
+extern void pxa2xx_spi_dma_release(struct driver_data *drv_data);
+extern int pxa2xx_spi_set_dma_burst_and_threshold(struct chip_data *chip,
+						  struct spi_device *spi,
+						  u8 bits_per_word,
+						  u32 *burst_code,
+						  u32 *threshold);
+
+#endif /* SPI_PXA2XX_H */