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-rw-r--r--drivers/spi/spi-atmel.c2
-rw-r--r--drivers/spi/spi-fsl-spi.c3
-rw-r--r--drivers/spi/spi-imx.c4
-rw-r--r--drivers/spi/spi-pl022.c92
-rw-r--r--drivers/spi/spi-topcliff-pch.c93
5 files changed, 132 insertions, 62 deletions
diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index 82dee9a6c0de..d3bff424286f 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -22,7 +22,7 @@
#include <asm/io.h>
#include <mach/board.h>
-#include <mach/gpio.h>
+#include <asm/gpio.h>
#include <mach/cpu.h>
/* SPI register offsets */
diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c
index d2407558773f..24cacff57786 100644
--- a/drivers/spi/spi-fsl-spi.c
+++ b/drivers/spi/spi-fsl-spi.c
@@ -825,6 +825,9 @@ static void fsl_spi_cpm_free(struct mpc8xxx_spi *mspi)
{
struct device *dev = mspi->dev;
+ if (!(mspi->flags & SPI_CPM_MODE))
+ return;
+
dma_unmap_single(dev, mspi->dma_dummy_rx, SPI_MRBLR, DMA_FROM_DEVICE);
dma_unmap_single(dev, mspi->dma_dummy_tx, PAGE_SIZE, DMA_TO_DEVICE);
cpm_muram_free(cpm_muram_offset(mspi->tx_bd));
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 8ac6542aedcd..fa594d604aca 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -786,9 +786,11 @@ static int __devinit spi_imx_probe(struct platform_device *pdev)
int cs_gpio = of_get_named_gpio(np, "cs-gpios", i);
if (cs_gpio < 0)
cs_gpio = mxc_platform_info->chipselect[i];
+
+ spi_imx->chipselect[i] = cs_gpio;
if (cs_gpio < 0)
continue;
- spi_imx->chipselect[i] = cs_gpio;
+
ret = gpio_request(spi_imx->chipselect[i], DRIVER_NAME);
if (ret) {
while (i > 0) {
diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
index 730b4a37b823..1ab2fa0d37fd 100644
--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -515,9 +515,6 @@ static void giveback(struct pl022 *pl022)
if (msg->complete)
msg->complete(msg->context);
/* This message is completed, so let's turn off the clocks & power */
- clk_disable(pl022->clk);
- amba_pclk_disable(pl022->adev);
- amba_vcore_disable(pl022->adev);
pm_runtime_put(&pl022->adev->dev);
}
@@ -1545,9 +1542,6 @@ static void pump_messages(struct work_struct *work)
* (poll/interrupt/DMA)
*/
pm_runtime_get_sync(&pl022->adev->dev);
- amba_vcore_enable(pl022->adev);
- amba_pclk_enable(pl022->adev);
- clk_enable(pl022->clk);
restore_state(pl022);
flush(pl022);
@@ -2186,8 +2180,6 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id)
}
printk(KERN_INFO "pl022: mapped registers from 0x%08x to %p\n",
adev->res.start, pl022->virtbase);
- pm_runtime_enable(dev);
- pm_runtime_resume(dev);
pl022->clk = clk_get(&adev->dev, NULL);
if (IS_ERR(pl022->clk)) {
@@ -2196,6 +2188,12 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id)
goto err_no_clk;
}
+ status = clk_prepare(pl022->clk);
+ if (status) {
+ dev_err(&adev->dev, "could not prepare SSP/SPI bus clock\n");
+ goto err_clk_prep;
+ }
+
/* Disable SSP */
writew((readw(SSP_CR1(pl022->virtbase)) & (~SSP_CR1_MASK_SSE)),
SSP_CR1(pl022->virtbase));
@@ -2235,12 +2233,9 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id)
goto err_spi_register;
}
dev_dbg(dev, "probe succeeded\n");
- /*
- * Disable the silicon block pclk and any voltage domain and just
- * power it up and clock it when it's needed
- */
- amba_pclk_disable(adev);
- amba_vcore_disable(adev);
+
+ /* let runtime pm put suspend */
+ pm_runtime_put(dev);
return 0;
err_spi_register:
@@ -2249,8 +2244,9 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id)
destroy_queue(pl022);
pl022_dma_remove(pl022);
free_irq(adev->irq[0], pl022);
- pm_runtime_disable(&adev->dev);
err_no_irq:
+ clk_unprepare(pl022->clk);
+ err_clk_prep:
clk_put(pl022->clk);
err_no_clk:
iounmap(pl022->virtbase);
@@ -2271,6 +2267,12 @@ pl022_remove(struct amba_device *adev)
if (!pl022)
return 0;
+ /*
+ * undo pm_runtime_put() in probe. I assume that we're not
+ * accessing the primecell here.
+ */
+ pm_runtime_get_noresume(&adev->dev);
+
/* Remove the queue */
if (destroy_queue(pl022) != 0)
dev_err(&adev->dev, "queue remove failed\n");
@@ -2278,6 +2280,7 @@ pl022_remove(struct amba_device *adev)
pl022_dma_remove(pl022);
free_irq(adev->irq[0], pl022);
clk_disable(pl022->clk);
+ clk_unprepare(pl022->clk);
clk_put(pl022->clk);
iounmap(pl022->virtbase);
amba_release_regions(adev);
@@ -2288,46 +2291,70 @@ pl022_remove(struct amba_device *adev)
return 0;
}
-#ifdef CONFIG_PM
-static int pl022_suspend(struct amba_device *adev, pm_message_t state)
+#ifdef CONFIG_SUSPEND
+static int pl022_suspend(struct device *dev)
{
- struct pl022 *pl022 = amba_get_drvdata(adev);
+ struct pl022 *pl022 = dev_get_drvdata(dev);
int status = 0;
status = stop_queue(pl022);
if (status) {
- dev_warn(&adev->dev, "suspend cannot stop queue\n");
+ dev_warn(dev, "suspend cannot stop queue\n");
return status;
}
- amba_vcore_enable(adev);
- amba_pclk_enable(adev);
+ amba_vcore_enable(pl022->adev);
+ amba_pclk_enable(pl022->adev);
load_ssp_default_config(pl022);
- amba_pclk_disable(adev);
- amba_vcore_disable(adev);
- dev_dbg(&adev->dev, "suspended\n");
+ amba_pclk_disable(pl022->adev);
+ amba_vcore_disable(pl022->adev);
+ dev_dbg(dev, "suspended\n");
return 0;
}
-static int pl022_resume(struct amba_device *adev)
+static int pl022_resume(struct device *dev)
{
- struct pl022 *pl022 = amba_get_drvdata(adev);
+ struct pl022 *pl022 = dev_get_drvdata(dev);
int status = 0;
/* Start the queue running */
status = start_queue(pl022);
if (status)
- dev_err(&adev->dev, "problem starting queue (%d)\n", status);
+ dev_err(dev, "problem starting queue (%d)\n", status);
else
- dev_dbg(&adev->dev, "resumed\n");
+ dev_dbg(dev, "resumed\n");
return status;
}
-#else
-#define pl022_suspend NULL
-#define pl022_resume NULL
#endif /* CONFIG_PM */
+#ifdef CONFIG_PM_RUNTIME
+static int pl022_runtime_suspend(struct device *dev)
+{
+ struct pl022 *pl022 = dev_get_drvdata(dev);
+
+ clk_disable(pl022->clk);
+ amba_vcore_disable(pl022->adev);
+
+ return 0;
+}
+
+static int pl022_runtime_resume(struct device *dev)
+{
+ struct pl022 *pl022 = dev_get_drvdata(dev);
+
+ amba_vcore_enable(pl022->adev);
+ clk_enable(pl022->clk);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops pl022_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pl022_suspend, pl022_resume)
+ SET_RUNTIME_PM_OPS(pl022_runtime_suspend, pl022_runtime_resume, NULL)
+};
+
static struct vendor_data vendor_arm = {
.fifodepth = 8,
.max_bpw = 16,
@@ -2407,12 +2434,11 @@ static struct amba_id pl022_ids[] = {
static struct amba_driver pl022_driver = {
.drv = {
.name = "ssp-pl022",
+ .pm = &pl022_dev_pm_ops,
},
.id_table = pl022_ids,
.probe = pl022_probe,
.remove = __devexit_p(pl022_remove),
- .suspend = pl022_suspend,
- .resume = pl022_resume,
};
diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c
index 1d23f3831866..6a80749391db 100644
--- a/drivers/spi/spi-topcliff-pch.c
+++ b/drivers/spi/spi-topcliff-pch.c
@@ -50,6 +50,8 @@
#define PCH_RX_THOLD 7
#define PCH_RX_THOLD_MAX 15
+#define PCH_TX_THOLD 2
+
#define PCH_MAX_BAUDRATE 5000000
#define PCH_MAX_FIFO_DEPTH 16
@@ -58,6 +60,7 @@
#define PCH_SLEEP_TIME 10
#define SSN_LOW 0x02U
+#define SSN_HIGH 0x03U
#define SSN_NO_CONTROL 0x00U
#define PCH_MAX_CS 0xFF
#define PCI_DEVICE_ID_GE_SPI 0x8816
@@ -316,16 +319,19 @@ static void pch_spi_handler_sub(struct pch_spi_data *data, u32 reg_spsr_val,
/* if transfer complete interrupt */
if (reg_spsr_val & SPSR_FI_BIT) {
- if (tx_index < bpw_len)
+ if ((tx_index == bpw_len) && (rx_index == tx_index)) {
+ /* disable interrupts */
+ pch_spi_setclr_reg(data->master, PCH_SPCR, 0, PCH_ALL);
+
+ /* transfer is completed;
+ inform pch_spi_process_messages */
+ data->transfer_complete = true;
+ data->transfer_active = false;
+ wake_up(&data->wait);
+ } else {
dev_err(&data->master->dev,
"%s : Transfer is not completed", __func__);
- /* disable interrupts */
- pch_spi_setclr_reg(data->master, PCH_SPCR, 0, PCH_ALL);
-
- /* transfer is completed;inform pch_spi_process_messages */
- data->transfer_complete = true;
- data->transfer_active = false;
- wake_up(&data->wait);
+ }
}
}
@@ -348,16 +354,26 @@ static irqreturn_t pch_spi_handler(int irq, void *dev_id)
"%s returning due to suspend\n", __func__);
return IRQ_NONE;
}
- if (data->use_dma)
- return IRQ_NONE;
io_remap_addr = data->io_remap_addr;
spsr = io_remap_addr + PCH_SPSR;
reg_spsr_val = ioread32(spsr);
- if (reg_spsr_val & SPSR_ORF_BIT)
- dev_err(&board_dat->pdev->dev, "%s Over run error", __func__);
+ if (reg_spsr_val & SPSR_ORF_BIT) {
+ dev_err(&board_dat->pdev->dev, "%s Over run error\n", __func__);
+ if (data->current_msg->complete != 0) {
+ data->transfer_complete = true;
+ data->current_msg->status = -EIO;
+ data->current_msg->complete(data->current_msg->context);
+ data->bcurrent_msg_processing = false;
+ data->current_msg = NULL;
+ data->cur_trans = NULL;
+ }
+ }
+
+ if (data->use_dma)
+ return IRQ_NONE;
/* Check if the interrupt is for SPI device */
if (reg_spsr_val & (SPSR_FI_BIT | SPSR_RFI_BIT)) {
@@ -756,10 +772,6 @@ static void pch_spi_set_ir(struct pch_spi_data *data)
wait_event_interruptible(data->wait, data->transfer_complete);
- pch_spi_writereg(data->master, PCH_SSNXCR, SSN_NO_CONTROL);
- dev_dbg(&data->master->dev,
- "%s:no more control over SSN-writing 0 to SSNXCR.", __func__);
-
/* clear all interrupts */
pch_spi_writereg(data->master, PCH_SPSR,
pch_spi_readreg(data->master, PCH_SPSR));
@@ -815,10 +827,11 @@ static void pch_spi_copy_rx_data_for_dma(struct pch_spi_data *data, int bpw)
}
}
-static void pch_spi_start_transfer(struct pch_spi_data *data)
+static int pch_spi_start_transfer(struct pch_spi_data *data)
{
struct pch_spi_dma_ctrl *dma;
unsigned long flags;
+ int rtn;
dma = &data->dma;
@@ -833,19 +846,23 @@ static void pch_spi_start_transfer(struct pch_spi_data *data)
initiating the transfer. */
dev_dbg(&data->master->dev,
"%s:waiting for transfer to get over\n", __func__);
- wait_event_interruptible(data->wait, data->transfer_complete);
+ rtn = wait_event_interruptible_timeout(data->wait,
+ data->transfer_complete,
+ msecs_to_jiffies(2 * HZ));
dma_sync_sg_for_cpu(&data->master->dev, dma->sg_rx_p, dma->nent,
DMA_FROM_DEVICE);
+
+ dma_sync_sg_for_cpu(&data->master->dev, dma->sg_tx_p, dma->nent,
+ DMA_FROM_DEVICE);
+ memset(data->dma.tx_buf_virt, 0, PAGE_SIZE);
+
async_tx_ack(dma->desc_rx);
async_tx_ack(dma->desc_tx);
kfree(dma->sg_tx_p);
kfree(dma->sg_rx_p);
spin_lock_irqsave(&data->lock, flags);
- pch_spi_writereg(data->master, PCH_SSNXCR, SSN_NO_CONTROL);
- dev_dbg(&data->master->dev,
- "%s:no more control over SSN-writing 0 to SSNXCR.", __func__);
/* clear fifo threshold, disable interrupts, disable SPI transfer */
pch_spi_setclr_reg(data->master, PCH_SPCR, 0,
@@ -858,6 +875,8 @@ static void pch_spi_start_transfer(struct pch_spi_data *data)
pch_spi_clear_fifo(data->master);
spin_unlock_irqrestore(&data->lock, flags);
+
+ return rtn;
}
static void pch_dma_rx_complete(void *arg)
@@ -1023,8 +1042,7 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw)
/* set receive fifo threshold and transmit fifo threshold */
pch_spi_setclr_reg(data->master, PCH_SPCR,
((size - 1) << SPCR_RFIC_FIELD) |
- ((PCH_MAX_FIFO_DEPTH - PCH_DMA_TRANS_SIZE) <<
- SPCR_TFIC_FIELD),
+ (PCH_TX_THOLD << SPCR_TFIC_FIELD),
MASK_RFIC_SPCR_BITS | MASK_TFIC_SPCR_BITS);
spin_unlock_irqrestore(&data->lock, flags);
@@ -1035,13 +1053,20 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw)
/* offset, length setting */
sg = dma->sg_rx_p;
for (i = 0; i < num; i++, sg++) {
- if (i == 0) {
- sg->offset = 0;
+ if (i == (num - 2)) {
+ sg->offset = size * i;
+ sg->offset = sg->offset * (*bpw / 8);
sg_set_page(sg, virt_to_page(dma->rx_buf_virt), rem,
sg->offset);
sg_dma_len(sg) = rem;
+ } else if (i == (num - 1)) {
+ sg->offset = size * (i - 1) + rem;
+ sg->offset = sg->offset * (*bpw / 8);
+ sg_set_page(sg, virt_to_page(dma->rx_buf_virt), size,
+ sg->offset);
+ sg_dma_len(sg) = size;
} else {
- sg->offset = rem + size * (i - 1);
+ sg->offset = size * i;
sg->offset = sg->offset * (*bpw / 8);
sg_set_page(sg, virt_to_page(dma->rx_buf_virt), size,
sg->offset);
@@ -1065,6 +1090,16 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw)
dma->desc_rx = desc_rx;
/* TX */
+ if (data->bpw_len > PCH_DMA_TRANS_SIZE) {
+ num = data->bpw_len / PCH_DMA_TRANS_SIZE;
+ size = PCH_DMA_TRANS_SIZE;
+ rem = 16;
+ } else {
+ num = 1;
+ size = data->bpw_len;
+ rem = data->bpw_len;
+ }
+
dma->sg_tx_p = kzalloc(sizeof(struct scatterlist)*num, GFP_ATOMIC);
sg_init_table(dma->sg_tx_p, num); /* Initialize SG table */
/* offset, length setting */
@@ -1162,6 +1197,7 @@ static void pch_spi_process_messages(struct work_struct *pwork)
if (data->use_dma)
pch_spi_request_dma(data,
data->current_msg->spi->bits_per_word);
+ pch_spi_writereg(data->master, PCH_SSNXCR, SSN_NO_CONTROL);
do {
/* If we are already processing a message get the next
transfer structure from the message otherwise retrieve
@@ -1184,7 +1220,8 @@ static void pch_spi_process_messages(struct work_struct *pwork)
if (data->use_dma) {
pch_spi_handle_dma(data, &bpw);
- pch_spi_start_transfer(data);
+ if (!pch_spi_start_transfer(data))
+ goto out;
pch_spi_copy_rx_data_for_dma(data, bpw);
} else {
pch_spi_set_tx(data, &bpw);
@@ -1222,6 +1259,8 @@ static void pch_spi_process_messages(struct work_struct *pwork)
} while (data->cur_trans != NULL);
+out:
+ pch_spi_writereg(data->master, PCH_SSNXCR, SSN_HIGH);
if (data->use_dma)
pch_spi_release_dma(data);
}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-14 18:28:39 +0100