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-rw-r--r--target/linux/ipq806x/patches-4.9/0005-spi-qup-Fix-DMA-mode-to-work-correctly.patch219
1 files changed, 0 insertions, 219 deletions
diff --git a/target/linux/ipq806x/patches-4.9/0005-spi-qup-Fix-DMA-mode-to-work-correctly.patch b/target/linux/ipq806x/patches-4.9/0005-spi-qup-Fix-DMA-mode-to-work-correctly.patch
deleted file mode 100644
index 20ab5c1..0000000
--- a/target/linux/ipq806x/patches-4.9/0005-spi-qup-Fix-DMA-mode-to-work-correctly.patch
+++ /dev/null
@@ -1,219 +0,0 @@
-From 1204ea49f3f7ded898d1ee202776093715a9ecf6 Mon Sep 17 00:00:00 2001
-From: Andy Gross <andy.gross@linaro.org>
-Date: Tue, 2 Feb 2016 17:00:53 -0600
-Subject: [PATCH 05/69] spi: qup: Fix DMA mode to work correctly
-
-This patch fixes a few issues with the DMA mode. The QUP needs to be
-placed in the run mode before the DMA transactions are executed. The
-conditions for being able to DMA vary between revisions of the QUP.
-This is due to v1.1.1 using ADM DMA and later revisions using BAM.
-
-Signed-off-by: Andy Gross <andy.gross@linaro.org>
----
- drivers/spi/spi-qup.c | 94 +++++++++++++++++++++++++++++++++------------------
- 1 file changed, 62 insertions(+), 32 deletions(-)
-
---- a/drivers/spi/spi-qup.c
-+++ b/drivers/spi/spi-qup.c
-@@ -142,6 +142,7 @@ struct spi_qup {
-
- struct spi_transfer *xfer;
- struct completion done;
-+ struct completion dma_tx_done;
- int error;
- int w_size; /* bytes per SPI word */
- int n_words;
-@@ -284,16 +285,16 @@ static void spi_qup_fifo_write(struct sp
-
- static void spi_qup_dma_done(void *data)
- {
-- struct spi_qup *qup = data;
-+ struct completion *done = data;
-
-- complete(&qup->done);
-+ complete(done);
- }
-
- static int spi_qup_prep_sg(struct spi_master *master, struct spi_transfer *xfer,
- enum dma_transfer_direction dir,
-- dma_async_tx_callback callback)
-+ dma_async_tx_callback callback,
-+ void *data)
- {
-- struct spi_qup *qup = spi_master_get_devdata(master);
- unsigned long flags = DMA_PREP_INTERRUPT | DMA_PREP_FENCE;
- struct dma_async_tx_descriptor *desc;
- struct scatterlist *sgl;
-@@ -312,11 +313,11 @@ static int spi_qup_prep_sg(struct spi_ma
- }
-
- desc = dmaengine_prep_slave_sg(chan, sgl, nents, dir, flags);
-- if (!desc)
-- return -EINVAL;
-+ if (IS_ERR_OR_NULL(desc))
-+ return desc ? PTR_ERR(desc) : -EINVAL;
-
- desc->callback = callback;
-- desc->callback_param = qup;
-+ desc->callback_param = data;
-
- cookie = dmaengine_submit(desc);
-
-@@ -332,18 +333,29 @@ static void spi_qup_dma_terminate(struct
- dmaengine_terminate_all(master->dma_rx);
- }
-
--static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer)
-+static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
-+unsigned long timeout)
- {
-+ struct spi_qup *qup = spi_master_get_devdata(master);
- dma_async_tx_callback rx_done = NULL, tx_done = NULL;
- int ret;
-
-+ /* before issuing the descriptors, set the QUP to run */
-+ ret = spi_qup_set_state(qup, QUP_STATE_RUN);
-+ if (ret) {
-+ dev_warn(qup->dev, "cannot set RUN state\n");
-+ return ret;
-+ }
-+
- if (xfer->rx_buf)
- rx_done = spi_qup_dma_done;
-- else if (xfer->tx_buf)
-+
-+ if (xfer->tx_buf)
- tx_done = spi_qup_dma_done;
-
- if (xfer->rx_buf) {
-- ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM, rx_done);
-+ ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM, rx_done,
-+ &qup->done);
- if (ret)
- return ret;
-
-@@ -351,17 +363,25 @@ static int spi_qup_do_dma(struct spi_mas
- }
-
- if (xfer->tx_buf) {
-- ret = spi_qup_prep_sg(master, xfer, DMA_MEM_TO_DEV, tx_done);
-+ ret = spi_qup_prep_sg(master, xfer, DMA_MEM_TO_DEV, tx_done,
-+ &qup->dma_tx_done);
- if (ret)
- return ret;
-
- dma_async_issue_pending(master->dma_tx);
- }
-
-- return 0;
-+ if (xfer->rx_buf && !wait_for_completion_timeout(&qup->done, timeout))
-+ return -ETIMEDOUT;
-+
-+ if (xfer->tx_buf && !wait_for_completion_timeout(&qup->dma_tx_done, timeout))
-+ ret = -ETIMEDOUT;
-+
-+ return ret;
- }
-
--static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer)
-+static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
-+ unsigned long timeout)
- {
- struct spi_qup *qup = spi_master_get_devdata(master);
- int ret;
-@@ -380,6 +400,15 @@ static int spi_qup_do_pio(struct spi_mas
-
- spi_qup_fifo_write(qup, xfer);
-
-+ ret = spi_qup_set_state(qup, QUP_STATE_RUN);
-+ if (ret) {
-+ dev_warn(qup->dev, "cannot set RUN state\n");
-+ return ret;
-+ }
-+
-+ if (!wait_for_completion_timeout(&qup->done, timeout))
-+ return -ETIMEDOUT;
-+
- return 0;
- }
-
-@@ -428,7 +457,6 @@ static irqreturn_t spi_qup_qup_irq(int i
- dev_warn(controller->dev, "CLK_OVER_RUN\n");
- if (spi_err & SPI_ERROR_CLK_UNDER_RUN)
- dev_warn(controller->dev, "CLK_UNDER_RUN\n");
--
- error = -EIO;
- }
-
-@@ -617,6 +645,7 @@ static int spi_qup_transfer_one(struct s
- timeout = 100 * msecs_to_jiffies(timeout);
-
- reinit_completion(&controller->done);
-+ reinit_completion(&controller->dma_tx_done);
-
- spin_lock_irqsave(&controller->lock, flags);
- controller->xfer = xfer;
-@@ -626,21 +655,13 @@ static int spi_qup_transfer_one(struct s
- spin_unlock_irqrestore(&controller->lock, flags);
-
- if (spi_qup_is_dma_xfer(controller->mode))
-- ret = spi_qup_do_dma(master, xfer);
-+ ret = spi_qup_do_dma(master, xfer, timeout);
- else
-- ret = spi_qup_do_pio(master, xfer);
-+ ret = spi_qup_do_pio(master, xfer, timeout);
-
- if (ret)
- goto exit;
-
-- if (spi_qup_set_state(controller, QUP_STATE_RUN)) {
-- dev_warn(controller->dev, "cannot set EXECUTE state\n");
-- goto exit;
-- }
--
-- if (!wait_for_completion_timeout(&controller->done, timeout))
-- ret = -ETIMEDOUT;
--
- exit:
- spi_qup_set_state(controller, QUP_STATE_RESET);
- spin_lock_irqsave(&controller->lock, flags);
-@@ -662,15 +683,23 @@ static bool spi_qup_can_dma(struct spi_m
- size_t dma_align = dma_get_cache_alignment();
- int n_words;
-
-- if (xfer->rx_buf && (xfer->len % qup->in_blk_sz ||
-- IS_ERR_OR_NULL(master->dma_rx) ||
-- !IS_ALIGNED((size_t)xfer->rx_buf, dma_align)))
-- return false;
-+ if (xfer->rx_buf) {
-+ if (!IS_ALIGNED((size_t)xfer->rx_buf, dma_align) ||
-+ IS_ERR_OR_NULL(master->dma_rx))
-+ return false;
-
-- if (xfer->tx_buf && (xfer->len % qup->out_blk_sz ||
-- IS_ERR_OR_NULL(master->dma_tx) ||
-- !IS_ALIGNED((size_t)xfer->tx_buf, dma_align)))
-- return false;
-+ if (qup->qup_v1 && (xfer->len % qup->in_blk_sz))
-+ return false;
-+ }
-+
-+ if (xfer->tx_buf) {
-+ if (!IS_ALIGNED((size_t)xfer->tx_buf, dma_align) ||
-+ IS_ERR_OR_NULL(master->dma_tx))
-+ return false;
-+
-+ if (qup->qup_v1 && (xfer->len % qup->out_blk_sz))
-+ return false;
-+ }
-
- n_words = xfer->len / DIV_ROUND_UP(xfer->bits_per_word, 8);
- if (n_words <= (qup->in_fifo_sz / sizeof(u32)))
-@@ -836,6 +865,7 @@ static int spi_qup_probe(struct platform
-
- spin_lock_init(&controller->lock);
- init_completion(&controller->done);
-+ init_completion(&controller->dma_tx_done);
-
- iomode = readl_relaxed(base + QUP_IO_M_MODES);
-
generated by cgit v1.1 at 2024-07-06 10:18:34 +0000