Unverified Commit 18674dee authored by Patrice Chotard's avatar Patrice Chotard Committed by Mark Brown
Browse files

spi: stm32-qspi: Add dirmap support 



Add stm32_qspi_dirmap_read() and stm32_qspi_dirmap_create()
to get dirmap support.

Update the exec_op callback which doens't allow anymore memory map
access. Memory map access are only available through the dirmap_read
callback.

Signed-off-by: default avatarPatrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20210419121541.11617-4-patrice.chotard@foss.st.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent f3530f26

drivers/spi/spi-stm32-qspi.c

+67 −16
Original line number Diff line number Diff line
@@ -331,7 +331,7 @@ static int stm32_qspi_send(struct spi_mem *mem, const struct spi_mem_op *op) 
{

	struct stm32_qspi *qspi = spi_controller_get_devdata(mem->spi->master);

	struct stm32_qspi_flash *flash = &qspi->flash[mem->spi->chip_select];

	u32 ccr, cr, addr_max;

	u32 ccr, cr;

	int timeout, err = 0;



	dev_dbg(qspi->dev, "cmd:%#x mode:%d.%d.%d.%d addr:%#llx len:%#x\n",
@@ -343,18 +343,6 @@ static int stm32_qspi_send(struct spi_mem *mem, const struct spi_mem_op *op) 
	if (err)

		goto abort;



	addr_max = op->addr.val + op->data.nbytes + 1;



	if (op->data.dir == SPI_MEM_DATA_IN) {

		if (addr_max < qspi->mm_size &&

		    op->addr.buswidth)

			qspi->fmode = CCR_FMODE_MM;

		else

			qspi->fmode = CCR_FMODE_INDR;

	} else {

		qspi->fmode = CCR_FMODE_INDW;

	}



	cr = readl_relaxed(qspi->io_base + QSPI_CR);

	cr &= ~CR_PRESC_MASK & ~CR_FSEL;

	cr |= FIELD_PREP(CR_PRESC_MASK, flash->presc);
@@ -364,8 +352,6 @@ static int stm32_qspi_send(struct spi_mem *mem, const struct spi_mem_op *op) 
	if (op->data.nbytes)

		writel_relaxed(op->data.nbytes - 1,

			       qspi->io_base + QSPI_DLR);

	else

		qspi->fmode = CCR_FMODE_INDW;



	ccr = qspi->fmode;

	ccr |= FIELD_PREP(CCR_INST_MASK, op->cmd.opcode);
@@ -441,6 +427,11 @@ static int stm32_qspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) 
	}



	mutex_lock(&qspi->lock);

	if (op->data.dir == SPI_MEM_DATA_IN && op->data.nbytes)

		qspi->fmode = CCR_FMODE_INDR;

	else

		qspi->fmode = CCR_FMODE_INDW;



	ret = stm32_qspi_send(mem, op);

	mutex_unlock(&qspi->lock);
@@ -450,6 +441,64 @@ static int stm32_qspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) 
	return ret;

}



static int stm32_qspi_dirmap_create(struct spi_mem_dirmap_desc *desc)

{

	struct stm32_qspi *qspi = spi_controller_get_devdata(desc->mem->spi->master);



	if (desc->info.op_tmpl.data.dir == SPI_MEM_DATA_OUT)

		return -EOPNOTSUPP;



	/* should never happen, as mm_base == null is an error probe exit condition */

	if (!qspi->mm_base && desc->info.op_tmpl.data.dir == SPI_MEM_DATA_IN)

		return -EOPNOTSUPP;



	if (!qspi->mm_size)

		return -EOPNOTSUPP;



	return 0;

}



static ssize_t stm32_qspi_dirmap_read(struct spi_mem_dirmap_desc *desc,

				      u64 offs, size_t len, void *buf)

{

	struct stm32_qspi *qspi = spi_controller_get_devdata(desc->mem->spi->master);

	struct spi_mem_op op;

	u32 addr_max;

	int ret;



	ret = pm_runtime_get_sync(qspi->dev);

	if (ret < 0) {

		pm_runtime_put_noidle(qspi->dev);

		return ret;

	}



	mutex_lock(&qspi->lock);

	/* make a local copy of desc op_tmpl and complete dirmap rdesc

	 * spi_mem_op template with offs, len and *buf in  order to get

	 * all needed transfer information into struct spi_mem_op

	 */

	memcpy(&op, &desc->info.op_tmpl, sizeof(struct spi_mem_op));

	dev_dbg(qspi->dev, "%s len = 0x%x offs = 0x%llx buf = 0x%p\n", __func__, len, offs, buf);



	op.data.nbytes = len;

	op.addr.val = desc->info.offset + offs;

	op.data.buf.in = buf;



	addr_max = op.addr.val + op.data.nbytes + 1;

	if (addr_max < qspi->mm_size && op.addr.buswidth)

		qspi->fmode = CCR_FMODE_MM;

	else

		qspi->fmode = CCR_FMODE_INDR;



	ret = stm32_qspi_send(desc->mem, &op);

	mutex_unlock(&qspi->lock);



	pm_runtime_mark_last_busy(qspi->dev);

	pm_runtime_put_autosuspend(qspi->dev);



	return ret ?: len;

}



static int stm32_qspi_setup(struct spi_device *spi)

{

	struct spi_controller *ctrl = spi->master;
@@ -556,6 +605,8 @@ static void stm32_qspi_dma_free(struct stm32_qspi *qspi) 
 */

static const struct spi_controller_mem_ops stm32_qspi_mem_ops = {

	.exec_op	= stm32_qspi_exec_op,

	.dirmap_create	= stm32_qspi_dirmap_create,

	.dirmap_read	= stm32_qspi_dirmap_read,

};



static int stm32_qspi_probe(struct platform_device *pdev)