diff mbox series

[v2,2/4] spi: Remove uses of #ifndef __U_BOOT__ from spi-mem.c

Message ID 20200807171334.307491-3-seanga2@gmail.com
State New
Delegated to: Jagannadha Sutradharudu Teki
Headers show
Series Misc fixes/cleanup | expand

Commit Message

Sean Anderson Aug. 7, 2020, 5:13 p.m. UTC
Preprocessing out large sections of the file is confusing and makes it
difficult to follow the control flow. Presumably these were initially added
to make porting easier, but this code has not been synced with Linux since
it was introduced two years ago.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
---

Changes in v2:
- Don't remove in-use headers
- Split removal of EXPORT_SYMBOL_GPL into another patch

 drivers/spi/spi-mem.c | 273 ------------------------------------------
 1 file changed, 273 deletions(-)
diff mbox series

Patch

diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index c095ae9505..d7209837d0 100644
--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -6,13 +6,6 @@ 
  * Author: Boris Brezillon <boris.brezillon@bootlin.com>
  */
 
-#ifndef __UBOOT__
-#include <log.h>
-#include <dm/devres.h>
-#include <linux/dmaengine.h>
-#include <linux/pm_runtime.h>
-#include "internals.h"
-#else
 #include <common.h>
 #include <dm.h>
 #include <errno.h>
@@ -21,94 +14,6 @@ 
 #include <spi.h>
 #include <spi-mem.h>
 #include <dm/device_compat.h>
-#endif
-
-#ifndef __UBOOT__
-/**
- * spi_controller_dma_map_mem_op_data() - DMA-map the buffer attached to a
- *					  memory operation
- * @ctlr: the SPI controller requesting this dma_map()
- * @op: the memory operation containing the buffer to map
- * @sgt: a pointer to a non-initialized sg_table that will be filled by this
- *	 function
- *
- * Some controllers might want to do DMA on the data buffer embedded in @op.
- * This helper prepares everything for you and provides a ready-to-use
- * sg_table. This function is not intended to be called from spi drivers.
- * Only SPI controller drivers should use it.
- * Note that the caller must ensure the memory region pointed by
- * op->data.buf.{in,out} is DMA-able before calling this function.
- *
- * Return: 0 in case of success, a negative error code otherwise.
- */
-int spi_controller_dma_map_mem_op_data(struct spi_controller *ctlr,
-				       const struct spi_mem_op *op,
-				       struct sg_table *sgt)
-{
-	struct device *dmadev;
-
-	if (!op->data.nbytes)
-		return -EINVAL;
-
-	if (op->data.dir == SPI_MEM_DATA_OUT && ctlr->dma_tx)
-		dmadev = ctlr->dma_tx->device->dev;
-	else if (op->data.dir == SPI_MEM_DATA_IN && ctlr->dma_rx)
-		dmadev = ctlr->dma_rx->device->dev;
-	else
-		dmadev = ctlr->dev.parent;
-
-	if (!dmadev)
-		return -EINVAL;
-
-	return spi_map_buf(ctlr, dmadev, sgt, op->data.buf.in, op->data.nbytes,
-			   op->data.dir == SPI_MEM_DATA_IN ?
-			   DMA_FROM_DEVICE : DMA_TO_DEVICE);
-}
-EXPORT_SYMBOL_GPL(spi_controller_dma_map_mem_op_data);
-
-/**
- * spi_controller_dma_unmap_mem_op_data() - DMA-unmap the buffer attached to a
- *					    memory operation
- * @ctlr: the SPI controller requesting this dma_unmap()
- * @op: the memory operation containing the buffer to unmap
- * @sgt: a pointer to an sg_table previously initialized by
- *	 spi_controller_dma_map_mem_op_data()
- *
- * Some controllers might want to do DMA on the data buffer embedded in @op.
- * This helper prepares things so that the CPU can access the
- * op->data.buf.{in,out} buffer again.
- *
- * This function is not intended to be called from SPI drivers. Only SPI
- * controller drivers should use it.
- *
- * This function should be called after the DMA operation has finished and is
- * only valid if the previous spi_controller_dma_map_mem_op_data() call
- * returned 0.
- *
- * Return: 0 in case of success, a negative error code otherwise.
- */
-void spi_controller_dma_unmap_mem_op_data(struct spi_controller *ctlr,
-					  const struct spi_mem_op *op,
-					  struct sg_table *sgt)
-{
-	struct device *dmadev;
-
-	if (!op->data.nbytes)
-		return;
-
-	if (op->data.dir == SPI_MEM_DATA_OUT && ctlr->dma_tx)
-		dmadev = ctlr->dma_tx->device->dev;
-	else if (op->data.dir == SPI_MEM_DATA_IN && ctlr->dma_rx)
-		dmadev = ctlr->dma_rx->device->dev;
-	else
-		dmadev = ctlr->dev.parent;
-
-	spi_unmap_buf(ctlr, dmadev, sgt,
-		      op->data.dir == SPI_MEM_DATA_IN ?
-		      DMA_FROM_DEVICE : DMA_TO_DEVICE);
-}
-EXPORT_SYMBOL_GPL(spi_controller_dma_unmap_mem_op_data);
-#endif /* __UBOOT__ */
 
 static int spi_check_buswidth_req(struct spi_slave *slave, u8 buswidth, bool tx)
 {
@@ -228,36 +133,8 @@  int spi_mem_exec_op(struct spi_slave *slave, const struct spi_mem_op *op)
 		return ret;
 
 	if (ops->mem_ops && ops->mem_ops->exec_op) {
-#ifndef __UBOOT__
-		/*
-		 * Flush the message queue before executing our SPI memory
-		 * operation to prevent preemption of regular SPI transfers.
-		 */
-		spi_flush_queue(ctlr);
-
-		if (ctlr->auto_runtime_pm) {
-			ret = pm_runtime_get_sync(ctlr->dev.parent);
-			if (ret < 0) {
-				dev_err(&ctlr->dev,
-					"Failed to power device: %d\n",
-					ret);
-				return ret;
-			}
-		}
-
-		mutex_lock(&ctlr->bus_lock_mutex);
-		mutex_lock(&ctlr->io_mutex);
-#endif
 		ret = ops->mem_ops->exec_op(slave, op);
 
-#ifndef __UBOOT__
-		mutex_unlock(&ctlr->io_mutex);
-		mutex_unlock(&ctlr->bus_lock_mutex);
-
-		if (ctlr->auto_runtime_pm)
-			pm_runtime_put(ctlr->dev.parent);
-#endif
-
 		/*
 		 * Some controllers only optimize specific paths (typically the
 		 * read path) and expect the core to use the regular SPI
@@ -269,80 +146,6 @@  int spi_mem_exec_op(struct spi_slave *slave, const struct spi_mem_op *op)
 		}
 	}
 
-#ifndef __UBOOT__
-	tmpbufsize = sizeof(op->cmd.opcode) + op->addr.nbytes +
-		     op->dummy.nbytes;
-
-	/*
-	 * Allocate a buffer to transmit the CMD, ADDR cycles with kmalloc() so
-	 * we're guaranteed that this buffer is DMA-able, as required by the
-	 * SPI layer.
-	 */
-	tmpbuf = kzalloc(tmpbufsize, GFP_KERNEL | GFP_DMA);
-	if (!tmpbuf)
-		return -ENOMEM;
-
-	spi_message_init(&msg);
-
-	tmpbuf[0] = op->cmd.opcode;
-	xfers[xferpos].tx_buf = tmpbuf;
-	xfers[xferpos].len = sizeof(op->cmd.opcode);
-	xfers[xferpos].tx_nbits = op->cmd.buswidth;
-	spi_message_add_tail(&xfers[xferpos], &msg);
-	xferpos++;
-	totalxferlen++;
-
-	if (op->addr.nbytes) {
-		int i;
-
-		for (i = 0; i < op->addr.nbytes; i++)
-			tmpbuf[i + 1] = op->addr.val >>
-					(8 * (op->addr.nbytes - i - 1));
-
-		xfers[xferpos].tx_buf = tmpbuf + 1;
-		xfers[xferpos].len = op->addr.nbytes;
-		xfers[xferpos].tx_nbits = op->addr.buswidth;
-		spi_message_add_tail(&xfers[xferpos], &msg);
-		xferpos++;
-		totalxferlen += op->addr.nbytes;
-	}
-
-	if (op->dummy.nbytes) {
-		memset(tmpbuf + op->addr.nbytes + 1, 0xff, op->dummy.nbytes);
-		xfers[xferpos].tx_buf = tmpbuf + op->addr.nbytes + 1;
-		xfers[xferpos].len = op->dummy.nbytes;
-		xfers[xferpos].tx_nbits = op->dummy.buswidth;
-		spi_message_add_tail(&xfers[xferpos], &msg);
-		xferpos++;
-		totalxferlen += op->dummy.nbytes;
-	}
-
-	if (op->data.nbytes) {
-		if (op->data.dir == SPI_MEM_DATA_IN) {
-			xfers[xferpos].rx_buf = op->data.buf.in;
-			xfers[xferpos].rx_nbits = op->data.buswidth;
-		} else {
-			xfers[xferpos].tx_buf = op->data.buf.out;
-			xfers[xferpos].tx_nbits = op->data.buswidth;
-		}
-
-		xfers[xferpos].len = op->data.nbytes;
-		spi_message_add_tail(&xfers[xferpos], &msg);
-		xferpos++;
-		totalxferlen += op->data.nbytes;
-	}
-
-	ret = spi_sync(slave, &msg);
-
-	kfree(tmpbuf);
-
-	if (ret)
-		return ret;
-
-	if (msg.actual_length != totalxferlen)
-		return -EIO;
-#else
-
 	if (op->data.nbytes) {
 		if (op->data.dir == SPI_MEM_DATA_IN)
 			rx_buf = op->data.buf.in;
@@ -407,7 +210,6 @@  int spi_mem_exec_op(struct spi_slave *slave, const struct spi_mem_op *op)
 
 	if (ret < 0)
 		return ret;
-#endif /* __UBOOT__ */
 
 	return 0;
 }
@@ -460,78 +262,3 @@  int spi_mem_adjust_op_size(struct spi_slave *slave, struct spi_mem_op *op)
 	return 0;
 }
 EXPORT_SYMBOL_GPL(spi_mem_adjust_op_size);
-
-#ifndef __UBOOT__
-static inline struct spi_mem_driver *to_spi_mem_drv(struct device_driver *drv)
-{
-	return container_of(drv, struct spi_mem_driver, spidrv.driver);
-}
-
-static int spi_mem_probe(struct spi_device *spi)
-{
-	struct spi_mem_driver *memdrv = to_spi_mem_drv(spi->dev.driver);
-	struct spi_mem *mem;
-
-	mem = devm_kzalloc(&spi->dev, sizeof(*mem), GFP_KERNEL);
-	if (!mem)
-		return -ENOMEM;
-
-	mem->spi = spi;
-	spi_set_drvdata(spi, mem);
-
-	return memdrv->probe(mem);
-}
-
-static int spi_mem_remove(struct spi_device *spi)
-{
-	struct spi_mem_driver *memdrv = to_spi_mem_drv(spi->dev.driver);
-	struct spi_mem *mem = spi_get_drvdata(spi);
-
-	if (memdrv->remove)
-		return memdrv->remove(mem);
-
-	return 0;
-}
-
-static void spi_mem_shutdown(struct spi_device *spi)
-{
-	struct spi_mem_driver *memdrv = to_spi_mem_drv(spi->dev.driver);
-	struct spi_mem *mem = spi_get_drvdata(spi);
-
-	if (memdrv->shutdown)
-		memdrv->shutdown(mem);
-}
-
-/**
- * spi_mem_driver_register_with_owner() - Register a SPI memory driver
- * @memdrv: the SPI memory driver to register
- * @owner: the owner of this driver
- *
- * Registers a SPI memory driver.
- *
- * Return: 0 in case of success, a negative error core otherwise.
- */
-
-int spi_mem_driver_register_with_owner(struct spi_mem_driver *memdrv,
-				       struct module *owner)
-{
-	memdrv->spidrv.probe = spi_mem_probe;
-	memdrv->spidrv.remove = spi_mem_remove;
-	memdrv->spidrv.shutdown = spi_mem_shutdown;
-
-	return __spi_register_driver(owner, &memdrv->spidrv);
-}
-EXPORT_SYMBOL_GPL(spi_mem_driver_register_with_owner);
-
-/**
- * spi_mem_driver_unregister_with_owner() - Unregister a SPI memory driver
- * @memdrv: the SPI memory driver to unregister
- *
- * Unregisters a SPI memory driver.
- */
-void spi_mem_driver_unregister(struct spi_mem_driver *memdrv)
-{
-	spi_unregister_driver(&memdrv->spidrv);
-}
-EXPORT_SYMBOL_GPL(spi_mem_driver_unregister);
-#endif /* __UBOOT__ */