spi: Zap cf_qspi driver and related code

Dropped becuase
- driver not used any board.
- no dm conversion.

Cc: Angelo Dureghello <angelo@sysam.it>
Cc: Richard Retanubun <richardretanubun@ruggedcom.com>
Signed-off-by: Jagan Teki <jagan@openedev.com>
Acked-by: Angelo Dureghello <angelo@sysam.it>

1 files changed, 0 insertions, 354 deletions

diff --git a/drivers/spi/cf_qspi.c b/drivers/spi/cf_qspi.c
deleted file mode 100644
index e57e63eb47..0000000000
--- a/drivers/spi/cf_qspi.c
+++ /dev/null
@@ -1,354 +0,0 @@
-/*
- * Freescale Coldfire Queued SPI driver
- *
- * NOTE:
- * This driver is written to transfer 8 bit at-a-time and uses the dedicated
- * SPI slave select pins as bit-banged GPIO to work with spi_flash subsystem.
- *
- * Copyright (C) 2011 Ruggedcom, Inc.
- * Richard Retanubun (richardretanubun@freescale.com)
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <common.h>
-#include <malloc.h>
-#include <spi.h>
-#include <asm/immap.h>
-#include <asm/io.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-#define to_cf_qspi_slave(s) container_of(s, struct cf_qspi_slave, slave)
-
-struct cf_qspi_slave {
-	struct spi_slave slave;	/* Specific bus:cs ID for each device */
-	qspi_t *regs;		/* Pointer to SPI controller registers */
-	u16 qmr;		/* QMR: Queued Mode Register */
-	u16 qwr;		/* QWR: Queued Wrap Register */
-	u16 qcr;		/* QCR: Queued Command Ram */
-};
-
-/* Register write wrapper functions */
-static void write_qmr(volatile qspi_t *qspi, u16 val)   { qspi->mr = val; }
-static void write_qdlyr(volatile qspi_t *qspi, u16 val) { qspi->dlyr = val; }
-static void write_qwr(volatile qspi_t *qspi, u16 val)   { qspi->wr = val; }
-static void write_qir(volatile qspi_t *qspi, u16 val)   { qspi->ir = val; }
-static void write_qar(volatile qspi_t *qspi, u16 val)   { qspi->ar = val; }
-static void write_qdr(volatile qspi_t *qspi, u16 val)   { qspi->dr = val; }
-/* Register read wrapper functions */
-static u16 read_qdlyr(volatile qspi_t *qspi) { return qspi->dlyr; }
-static u16 read_qwr(volatile qspi_t *qspi)   { return qspi->wr; }
-static u16 read_qir(volatile qspi_t *qspi)   { return qspi->ir; }
-static u16 read_qdr(volatile qspi_t *qspi)   { return qspi->dr; }
-
-/* These call points may be different for each ColdFire CPU */
-extern void cfspi_port_conf(void);
-static void cfspi_cs_activate(uint bus, uint cs, uint cs_active_high);
-static void cfspi_cs_deactivate(uint bus, uint cs, uint cs_active_high);
-
-int spi_claim_bus(struct spi_slave *slave)
-{
-	return 0;
-}
-void spi_release_bus(struct spi_slave *slave)
-{
-}
-
-__attribute__((weak))
-void spi_init(void)
-{
-	cfspi_port_conf();
-}
-
-__attribute__((weak))
-void spi_cs_activate(struct spi_slave *slave)
-{
-	struct cf_qspi_slave *dev = to_cf_qspi_slave(slave);
-
-	cfspi_cs_activate(slave->bus, slave->cs, !(dev->qwr & QSPI_QWR_CSIV));
-}
-
-__attribute__((weak))
-void spi_cs_deactivate(struct spi_slave *slave)
-{
-	struct cf_qspi_slave *dev = to_cf_qspi_slave(slave);
-
-	cfspi_cs_deactivate(slave->bus, slave->cs, !(dev->qwr & QSPI_QWR_CSIV));
-}
-
-__attribute__((weak))
-int spi_cs_is_valid(unsigned int bus, unsigned int cs)
-{
-	/* Only 1 bus and 4 chipselect per controller */
-	if (bus == 0 && (cs >= 0 && cs < 4))
-		return 1;
-	else
-		return 0;
-}
-
-void spi_free_slave(struct spi_slave *slave)
-{
-	struct cf_qspi_slave *dev = to_cf_qspi_slave(slave);
-
-	free(dev);
-}
-
-/* Translate information given by spi_setup_slave to members of cf_qspi_slave */
-struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
-				  unsigned int max_hz, unsigned int mode)
-{
-	struct cf_qspi_slave *dev = NULL;
-
-	if (!spi_cs_is_valid(bus, cs))
-		return NULL;
-
-	dev = spi_alloc_slave(struct cf_qspi_slave, bus, cs);
-	if (!dev)
-		return NULL;
-
-	/* Initialize to known value */
-	dev->regs      = (qspi_t *)MMAP_QSPI;
-	dev->qmr       = 0;
-	dev->qwr       = 0;
-	dev->qcr       = 0;
-
-
-	/* Map max_hz to QMR[BAUD] */
-	if (max_hz == 0) /* Go as fast as possible */
-		dev->qmr = 2u;
-	else /* Get the closest baud rate */
-		dev->qmr = clamp(((gd->bus_clk >> 2) + max_hz - 1)/max_hz,
-					2lu, 255lu);
-
-	/* Map mode to QMR[CPOL] and QMR[CPHA] */
-	if (mode & SPI_CPOL)
-		dev->qmr |= QSPI_QMR_CPOL;
-
-	if (mode & SPI_CPHA)
-		dev->qmr |= QSPI_QMR_CPHA;
-
-	/* Hardcode bit length to 8 bit per transter */
-	dev->qmr |= QSPI_QMR_BITS_8;
-
-	/* Set QMR[MSTR] to enable QSPI as master */
-	dev->qmr |= QSPI_QMR_MSTR;
-
-	/*
-	 * Set QCR and QWR to default values for spi flash operation.
-	 * If more custom QCR and QRW are needed, overload mode variable
-	 */
-	dev->qcr = (QSPI_QDR_CONT | QSPI_QDR_BITSE);
-
-	if (!(mode & SPI_CS_HIGH))
-		dev->qwr |= QSPI_QWR_CSIV;
-
-	return &dev->slave;
-}
-
-/* Transfer 8 bit at a time */
-int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
-	     void *din, unsigned long flags)
-{
-	struct cf_qspi_slave *dev = to_cf_qspi_slave(slave);
-	volatile qspi_t *qspi = dev->regs;
-	u8 *txbuf = (u8 *)dout;
-	u8 *rxbuf = (u8 *)din;
-	u32 count = DIV_ROUND_UP(bitlen, 8);
-	u32 n, i = 0;
-
-	/* Sanitize arguments */
-	if (slave == NULL) {
-		printf("%s: NULL slave ptr\n", __func__);
-		return -1;
-	}
-
-	if (flags & SPI_XFER_BEGIN)
-		spi_cs_activate(slave);
-
-	/* There is something to send, lets process it. spi_xfer is also called
-	 * just to toggle chip select, so bitlen of 0 is valid */
-	if (count > 0) {
-		/*
-		* NOTE: Since chip select is driven as a bit-bang-ed GPIO
-		* using spi_cs_activate() and spi_cs_deactivate(),
-		* the chip select settings inside the controller
-		* (i.e. QCR[CONT] and QWR[CSIV]) are moot. The bits are set to
-		* keep the controller settings consistent with the actual
-		* operation of the bus.
-		*/
-
-		/* Write the slave device's settings for the controller.*/
-		write_qmr(qspi, dev->qmr);
-		write_qwr(qspi, dev->qwr);
-
-		/* Limit transfer to 16 at a time */
-		n = min(count, 16u);
-		do {
-			/* Setup queue end point */
-			write_qwr(qspi, ((read_qwr(qspi) & QSPI_QWR_ENDQP_MASK)
-				| QSPI_QWR_ENDQP((n-1))));
-
-			/* Write Command RAM */
-			write_qar(qspi, QSPI_QAR_CMD);
-			for (i = 0; i < n; ++i)
-				write_qdr(qspi, dev->qcr);
-
-			/* Write TxBuf, if none given, fill with ZEROes */
-			write_qar(qspi, QSPI_QAR_TRANS);
-			if (txbuf) {
-				for (i = 0; i < n; ++i)
-					write_qdr(qspi, *txbuf++);
-			} else {
-				for (i = 0; i < n; ++i)
-					write_qdr(qspi, 0);
-			}
-
-			/* Clear QIR[SPIF] by writing a 1 to it */
-			write_qir(qspi, read_qir(qspi) | QSPI_QIR_SPIF);
-			/* Set QDLYR[SPE] to start sending */
-			write_qdlyr(qspi, read_qdlyr(qspi) | QSPI_QDLYR_SPE);
-
-			/* Poll QIR[SPIF] for transfer completion */
-			while ((read_qir(qspi) & QSPI_QIR_SPIF) != 1)
-				udelay(1);
-
-			/* If given read RxBuf, load data to it */
-			if (rxbuf) {
-				write_qar(qspi, QSPI_QAR_RECV);
-				for (i = 0; i < n; ++i)
-					*rxbuf++ = read_qdr(qspi);
-			}
-
-			/* Decrement count */
-			count -= n;
-		} while (count);
-	}
-
-	if (flags & SPI_XFER_END)
-		spi_cs_deactivate(slave);
-
-	return 0;
-}
-
-/* Each MCF CPU may have different pin assignments for chip selects. */
-#if defined(CONFIG_M5271)
-/* Assert chip select, val = [1|0] , dir = out, mode = GPIO */
-void cfspi_cs_activate(uint bus, uint cs, uint cs_active_high)
-{
-	debug("%s: bus %d cs %d cs_active_high %d\n",
-		__func__, bus, cs, cs_active_high);
-
-	switch (cs) {
-	case 0: /* QSPI_CS[0] = PQSPI[3] */
-		if (cs_active_high)
-			mbar_writeByte(MCF_GPIO_PPDSDR_QSPI, 0x08);
-		else
-			mbar_writeByte(MCF_GPIO_PCLRR_QSPI, 0xF7);
-
-		mbar_writeByte(MCF_GPIO_PDDR_QSPI,
-			mbar_readByte(MCF_GPIO_PDDR_QSPI) | 0x08);
-
-		mbar_writeByte(MCF_GPIO_PAR_QSPI,
-			mbar_readByte(MCF_GPIO_PAR_QSPI) & 0xDF);
-		break;
-	case 1: /* QSPI_CS[1] = PQSPI[4] */
-		if (cs_active_high)
-			mbar_writeByte(MCF_GPIO_PPDSDR_QSPI, 0x10);
-		else
-			mbar_writeByte(MCF_GPIO_PCLRR_QSPI, 0xEF);
-
-		mbar_writeByte(MCF_GPIO_PDDR_QSPI,
-			mbar_readByte(MCF_GPIO_PDDR_QSPI) | 0x10);
-
-		mbar_writeByte(MCF_GPIO_PAR_QSPI,
-			mbar_readByte(MCF_GPIO_PAR_QSPI) & 0x3F);
-		break;
-	case 2: /* QSPI_CS[2] = PTIMER[7] */
-		if (cs_active_high)
-			mbar_writeByte(MCF_GPIO_PPDSDR_TIMER, 0x80);
-		else
-			mbar_writeByte(MCF_GPIO_PCLRR_TIMER, 0x7F);
-
-		mbar_writeByte(MCF_GPIO_PDDR_TIMER,
-			mbar_readByte(MCF_GPIO_PDDR_TIMER) | 0x80);
-
-		mbar_writeShort(MCF_GPIO_PAR_TIMER,
-			mbar_readShort(MCF_GPIO_PAR_TIMER) & 0x3FFF);
-		break;
-	case 3: /* QSPI_CS[3] = PTIMER[3] */
-		if (cs_active_high)
-			mbar_writeByte(MCF_GPIO_PPDSDR_TIMER, 0x08);
-		else
-			mbar_writeByte(MCF_GPIO_PCLRR_TIMER, 0xF7);
-
-		mbar_writeByte(MCF_GPIO_PDDR_TIMER,
-			mbar_readByte(MCF_GPIO_PDDR_TIMER) | 0x08);
-
-		mbar_writeShort(MCF_GPIO_PAR_TIMER,
-			mbar_readShort(MCF_GPIO_PAR_TIMER) & 0xFF3F);
-		break;
-	}
-}
-
-/* Deassert chip select, val = [1|0], dir = in, mode = GPIO
- * direction set as IN to undrive the pin, external pullup/pulldown will bring
- * bus to deassert state.
- */
-void cfspi_cs_deactivate(uint bus, uint cs, uint cs_active_high)
-{
-	debug("%s: bus %d cs %d cs_active_high %d\n",
-		__func__, bus, cs, cs_active_high);
-
-	switch (cs) {
-	case 0: /* QSPI_CS[0] = PQSPI[3] */
-		if (cs_active_high)
-			mbar_writeByte(MCF_GPIO_PCLRR_QSPI, 0xF7);
-		else
-			mbar_writeByte(MCF_GPIO_PPDSDR_QSPI, 0x08);
-
-		mbar_writeByte(MCF_GPIO_PDDR_QSPI,
-			mbar_readByte(MCF_GPIO_PDDR_QSPI) & 0xF7);
-
-		mbar_writeByte(MCF_GPIO_PAR_QSPI,
-			mbar_readByte(MCF_GPIO_PAR_QSPI) & 0xDF);
-		break;
-	case 1: /* QSPI_CS[1] = PQSPI[4] */
-		if (cs_active_high)
-			mbar_writeByte(MCF_GPIO_PCLRR_QSPI, 0xEF);
-		else
-			mbar_writeByte(MCF_GPIO_PPDSDR_QSPI, 0x10);
-
-		mbar_writeByte(MCF_GPIO_PDDR_QSPI,
-			mbar_readByte(MCF_GPIO_PDDR_QSPI) & 0xEF);
-
-		mbar_writeByte(MCF_GPIO_PAR_QSPI,
-			mbar_readByte(MCF_GPIO_PAR_QSPI) & 0x3F);
-		break;
-	case 2: /* QSPI_CS[2] = PTIMER[7] */
-		if (cs_active_high)
-			mbar_writeByte(MCF_GPIO_PCLRR_TIMER, 0x7F);
-		else
-			mbar_writeByte(MCF_GPIO_PPDSDR_TIMER, 0x80);
-
-		mbar_writeByte(MCF_GPIO_PDDR_TIMER,
-			mbar_readByte(MCF_GPIO_PDDR_TIMER) & 0x7F);
-
-		mbar_writeShort(MCF_GPIO_PAR_TIMER,
-			mbar_readShort(MCF_GPIO_PAR_TIMER) & 0x3FFF);
-		break;
-	case 3: /* QSPI_CS[3] = PTIMER[3] */
-		if (cs_active_high)
-			mbar_writeByte(MCF_GPIO_PCLRR_TIMER, 0xF7);
-		else
-			mbar_writeByte(MCF_GPIO_PPDSDR_TIMER, 0x08);
-
-		mbar_writeByte(MCF_GPIO_PDDR_TIMER,
-			mbar_readByte(MCF_GPIO_PDDR_TIMER) & 0xF7);
-
-		mbar_writeShort(MCF_GPIO_PAR_TIMER,
-			mbar_readShort(MCF_GPIO_PAR_TIMER) & 0xFF3F);
-		break;
-	}
-}
-#endif /* CONFIG_M5271 */