This series adds spi device mode functionality to geni based Qupv3.
The common header file contains spi slave related registers and masks.
Praveen Talari (2):
soc: qcom: geni-se: Add SPI Device mode support for GENI based QuPv3
spi: spi-geni-qcom: Add SPI Device mode support for GENI based QuPv3
---
v3 -> v4:
- Used existing property spi-slave
- Hence dropped dt-binding changes
v2 -> v3:
- Modified commit message
- Addressed comment on dt-binding
v1 -> v2:
- Added dt-binding change for spi slave
- Modified commit message
- Addressed review comments in driver
drivers/spi/spi-geni-qcom.c | 57 ++++++++++++++++++++++++++++----
include/linux/soc/qcom/geni-se.h | 9 +++++
2 files changed, 60 insertions(+), 6 deletions(-)
--
2.17.1
Currently spi geni driver supports only master mode operation.
Add spi device mode support to GENI based QuPv3.
Signed-off-by: Praveen Talari <[email protected]>
---
v3 -> v4:
- Used existing property spi-slave.
v2 -> v3:
- modified commit message to use device mode instead of slave mode
v1 -> v2
- modified the commit message
- added the code changes for code comments
---
drivers/spi/spi-geni-qcom.c | 57 +++++++++++++++++++++++++++++++++----
1 file changed, 51 insertions(+), 6 deletions(-)
diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c
index 206cc04bb1ed..4ec4fdee06b5 100644
--- a/drivers/spi/spi-geni-qcom.c
+++ b/drivers/spi/spi-geni-qcom.c
@@ -12,6 +12,7 @@
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#include <linux/pm_runtime.h>
+#include <linux/property.h>
#include <linux/soc/qcom/geni-se.h>
#include <linux/spi/spi.h>
#include <linux/spinlock.h>
@@ -52,6 +53,9 @@
#define SPI_CS_CLK_DELAY_MSK GENMASK(19, 10)
#define SPI_CS_CLK_DELAY_SHFT 10
+#define SE_SPI_SLAVE_EN (0x2BC)
+#define SPI_SLAVE_EN BIT(0)
+
/* M_CMD OP codes for SPI */
#define SPI_TX_ONLY 1
#define SPI_RX_ONLY 2
@@ -99,6 +103,24 @@ struct spi_geni_master {
int cur_xfer_mode;
};
+static struct spi_master *get_spi_master(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct spi_master *spi = platform_get_drvdata(pdev);
+
+ return spi;
+}
+
+static void spi_slv_setup(struct spi_geni_master *mas)
+{
+ struct geni_se *se = &mas->se;
+
+ writel(SPI_SLAVE_EN, se->base + SE_SPI_SLAVE_EN);
+ writel(GENI_IO_MUX_0_EN, se->base + GENI_OUTPUT_CTRL);
+ writel(START_TRIGGER, se->base + SE_GENI_CFG_SEQ_START);
+ dev_dbg(mas->dev, "spi slave setup done\n");
+}
+
static int get_spi_clk_cfg(unsigned int speed_hz,
struct spi_geni_master *mas,
unsigned int *clk_idx,
@@ -140,12 +162,18 @@ static void handle_se_timeout(struct spi_master *spi,
const struct spi_transfer *xfer;
spin_lock_irq(&mas->lock);
- reinit_completion(&mas->cancel_done);
if (mas->cur_xfer_mode == GENI_SE_FIFO)
writel(0, se->base + SE_GENI_TX_WATERMARK_REG);
xfer = mas->cur_xfer;
mas->cur_xfer = NULL;
+
+ if (spi->slave) {
+ spin_unlock_irq(&mas->lock);
+ goto unmap_if_dma;
+ }
+
+ reinit_completion(&mas->cancel_done);
geni_se_cancel_m_cmd(se);
spin_unlock_irq(&mas->lock);
@@ -542,6 +570,10 @@ static bool geni_can_dma(struct spi_controller *ctlr,
if (mas->cur_xfer_mode == GENI_GPI_DMA)
return true;
+ /* Set DMA mode for SPI slave. */
+ if (ctlr->slave)
+ return true;
+
len = get_xfer_len_in_words(xfer, mas);
fifo_size = mas->tx_fifo_depth * mas->fifo_width_bits / mas->cur_bits_per_word;
@@ -619,6 +651,7 @@ static void spi_geni_release_dma_chan(struct spi_geni_master *mas)
static int spi_geni_init(struct spi_geni_master *mas)
{
+ struct spi_master *spi = get_spi_master(mas->dev);
struct geni_se *se = &mas->se;
unsigned int proto, major, minor, ver;
u32 spi_tx_cfg, fifo_disable;
@@ -627,7 +660,14 @@ static int spi_geni_init(struct spi_geni_master *mas)
pm_runtime_get_sync(mas->dev);
proto = geni_se_read_proto(se);
- if (proto != GENI_SE_SPI) {
+
+ if (spi->slave) {
+ if (proto != GENI_SE_SPI_SLAVE) {
+ dev_err(mas->dev, "Invalid proto %d\n", proto);
+ goto out_pm;
+ }
+ spi_slv_setup(mas);
+ } else if (proto != GENI_SE_SPI) {
dev_err(mas->dev, "Invalid proto %d\n", proto);
goto out_pm;
}
@@ -677,9 +717,11 @@ static int spi_geni_init(struct spi_geni_master *mas)
}
/* We always control CS manually */
- spi_tx_cfg = readl(se->base + SE_SPI_TRANS_CFG);
- spi_tx_cfg &= ~CS_TOGGLE;
- writel(spi_tx_cfg, se->base + SE_SPI_TRANS_CFG);
+ if (!spi->slave) {
+ spi_tx_cfg = readl(se->base + SE_SPI_TRANS_CFG);
+ spi_tx_cfg &= ~CS_TOGGLE;
+ writel(spi_tx_cfg, se->base + SE_SPI_TRANS_CFG);
+ }
out_pm:
pm_runtime_put(mas->dev);
@@ -1072,6 +1114,9 @@ static int spi_geni_probe(struct platform_device *pdev)
pm_runtime_set_autosuspend_delay(&pdev->dev, 250);
pm_runtime_enable(dev);
+ if (device_property_read_bool(&pdev->dev, "spi-slave"))
+ spi->slave = true;
+
ret = geni_icc_get(&mas->se, NULL);
if (ret)
goto spi_geni_probe_runtime_disable;
@@ -1092,7 +1137,7 @@ static int spi_geni_probe(struct platform_device *pdev)
* for dma (gsi) mode, the gsi will set cs based on params passed in
* TRE
*/
- if (mas->cur_xfer_mode == GENI_SE_FIFO)
+ if (!spi->slave && mas->cur_xfer_mode == GENI_SE_FIFO)
spi->set_cs = spi_geni_set_cs;
ret = request_irq(mas->irq, geni_spi_isr, 0, dev_name(dev), spi);
--
2.17.1
Add device mode supported registers and masks.
Signed-off-by: Praveen Talari <[email protected]>
---
v2 -> v3:
- modified commit message to use device mode instead of slave mode
v1 -> v2:
- modified commit message
---
include/linux/soc/qcom/geni-se.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/include/linux/soc/qcom/geni-se.h b/include/linux/soc/qcom/geni-se.h
index 821a19135bb6..29e06905bc1f 100644
--- a/include/linux/soc/qcom/geni-se.h
+++ b/include/linux/soc/qcom/geni-se.h
@@ -35,6 +35,7 @@ enum geni_se_protocol_type {
GENI_SE_UART,
GENI_SE_I2C,
GENI_SE_I3C,
+ GENI_SE_SPI_SLAVE,
};
struct geni_wrapper;
@@ -73,12 +74,14 @@ struct geni_se {
/* Common SE registers */
#define GENI_FORCE_DEFAULT_REG 0x20
+#define GENI_OUTPUT_CTRL 0x24
#define SE_GENI_STATUS 0x40
#define GENI_SER_M_CLK_CFG 0x48
#define GENI_SER_S_CLK_CFG 0x4c
#define GENI_IF_DISABLE_RO 0x64
#define GENI_FW_REVISION_RO 0x68
#define SE_GENI_CLK_SEL 0x7c
+#define SE_GENI_CFG_SEQ_START 0x84
#define SE_GENI_DMA_MODE_EN 0x258
#define SE_GENI_M_CMD0 0x600
#define SE_GENI_M_CMD_CTRL_REG 0x604
@@ -111,6 +114,9 @@ struct geni_se {
/* GENI_FORCE_DEFAULT_REG fields */
#define FORCE_DEFAULT BIT(0)
+/* GENI_OUTPUT_CTRL fields */
+#define GENI_IO_MUX_0_EN BIT(0)
+
/* GENI_STATUS fields */
#define M_GENI_CMD_ACTIVE BIT(0)
#define S_GENI_CMD_ACTIVE BIT(12)
@@ -130,6 +136,9 @@ struct geni_se {
/* GENI_CLK_SEL fields */
#define CLK_SEL_MSK GENMASK(2, 0)
+/* SE_GENI_CFG_SEQ_START fields */
+#define START_TRIGGER BIT(0)
+
/* SE_GENI_DMA_MODE_EN */
#define GENI_DMA_MODE_EN BIT(0)
--
2.17.1
On Thu, 6 Jul 2023 at 08:12, Praveen Talari <[email protected]> wrote:
>
> Currently spi geni driver supports only master mode operation.
>
> Add spi device mode support to GENI based QuPv3.
>
> Signed-off-by: Praveen Talari <[email protected]>
> ---
> v3 -> v4:
> - Used existing property spi-slave.
>
> v2 -> v3:
> - modified commit message to use device mode instead of slave mode
>
> v1 -> v2
> - modified the commit message
> - added the code changes for code comments
> ---
> drivers/spi/spi-geni-qcom.c | 57 +++++++++++++++++++++++++++++++++----
> 1 file changed, 51 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c
> index 206cc04bb1ed..4ec4fdee06b5 100644
> --- a/drivers/spi/spi-geni-qcom.c
> +++ b/drivers/spi/spi-geni-qcom.c
> @@ -12,6 +12,7 @@
> #include <linux/platform_device.h>
> #include <linux/pm_opp.h>
> #include <linux/pm_runtime.h>
> +#include <linux/property.h>
> #include <linux/soc/qcom/geni-se.h>
> #include <linux/spi/spi.h>
> #include <linux/spinlock.h>
> @@ -52,6 +53,9 @@
> #define SPI_CS_CLK_DELAY_MSK GENMASK(19, 10)
> #define SPI_CS_CLK_DELAY_SHFT 10
>
> +#define SE_SPI_SLAVE_EN (0x2BC)
> +#define SPI_SLAVE_EN BIT(0)
> +
> /* M_CMD OP codes for SPI */
> #define SPI_TX_ONLY 1
> #define SPI_RX_ONLY 2
> @@ -99,6 +103,24 @@ struct spi_geni_master {
> int cur_xfer_mode;
> };
>
> +static struct spi_master *get_spi_master(struct device *dev)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> + struct spi_master *spi = platform_get_drvdata(pdev);
You can use dev_get_drvdata() directly, without going through platform_device.
> +
> + return spi;
> +}
> +
> +static void spi_slv_setup(struct spi_geni_master *mas)
> +{
> + struct geni_se *se = &mas->se;
> +
> + writel(SPI_SLAVE_EN, se->base + SE_SPI_SLAVE_EN);
> + writel(GENI_IO_MUX_0_EN, se->base + GENI_OUTPUT_CTRL);
> + writel(START_TRIGGER, se->base + SE_GENI_CFG_SEQ_START);
> + dev_dbg(mas->dev, "spi slave setup done\n");
> +}
> +
> static int get_spi_clk_cfg(unsigned int speed_hz,
> struct spi_geni_master *mas,
> unsigned int *clk_idx,
> @@ -140,12 +162,18 @@ static void handle_se_timeout(struct spi_master *spi,
> const struct spi_transfer *xfer;
>
> spin_lock_irq(&mas->lock);
> - reinit_completion(&mas->cancel_done);
> if (mas->cur_xfer_mode == GENI_SE_FIFO)
> writel(0, se->base + SE_GENI_TX_WATERMARK_REG);
>
> xfer = mas->cur_xfer;
> mas->cur_xfer = NULL;
> +
> + if (spi->slave) {
A comment here would be nice.
> + spin_unlock_irq(&mas->lock);
> + goto unmap_if_dma;
> + }
> +
> + reinit_completion(&mas->cancel_done);
> geni_se_cancel_m_cmd(se);
> spin_unlock_irq(&mas->lock);
>
> @@ -542,6 +570,10 @@ static bool geni_can_dma(struct spi_controller *ctlr,
> if (mas->cur_xfer_mode == GENI_GPI_DMA)
> return true;
>
> + /* Set DMA mode for SPI slave. */
SE DMA mode
> + if (ctlr->slave)
> + return true;
> +
> len = get_xfer_len_in_words(xfer, mas);
> fifo_size = mas->tx_fifo_depth * mas->fifo_width_bits / mas->cur_bits_per_word;
>
> @@ -619,6 +651,7 @@ static void spi_geni_release_dma_chan(struct spi_geni_master *mas)
>
> static int spi_geni_init(struct spi_geni_master *mas)
> {
> + struct spi_master *spi = get_spi_master(mas->dev);
> struct geni_se *se = &mas->se;
> unsigned int proto, major, minor, ver;
> u32 spi_tx_cfg, fifo_disable;
> @@ -627,7 +660,14 @@ static int spi_geni_init(struct spi_geni_master *mas)
> pm_runtime_get_sync(mas->dev);
>
> proto = geni_se_read_proto(se);
> - if (proto != GENI_SE_SPI) {
> +
> + if (spi->slave) {
> + if (proto != GENI_SE_SPI_SLAVE) {
> + dev_err(mas->dev, "Invalid proto %d\n", proto);
> + goto out_pm;
> + }
> + spi_slv_setup(mas);
> + } else if (proto != GENI_SE_SPI) {
> dev_err(mas->dev, "Invalid proto %d\n", proto);
> goto out_pm;
> }
> @@ -677,9 +717,11 @@ static int spi_geni_init(struct spi_geni_master *mas)
> }
>
> /* We always control CS manually */
> - spi_tx_cfg = readl(se->base + SE_SPI_TRANS_CFG);
> - spi_tx_cfg &= ~CS_TOGGLE;
> - writel(spi_tx_cfg, se->base + SE_SPI_TRANS_CFG);
> + if (!spi->slave) {
> + spi_tx_cfg = readl(se->base + SE_SPI_TRANS_CFG);
> + spi_tx_cfg &= ~CS_TOGGLE;
> + writel(spi_tx_cfg, se->base + SE_SPI_TRANS_CFG);
> + }
>
> out_pm:
> pm_runtime_put(mas->dev);
> @@ -1072,6 +1114,9 @@ static int spi_geni_probe(struct platform_device *pdev)
> pm_runtime_set_autosuspend_delay(&pdev->dev, 250);
> pm_runtime_enable(dev);
>
> + if (device_property_read_bool(&pdev->dev, "spi-slave"))
> + spi->slave = true;
> +
> ret = geni_icc_get(&mas->se, NULL);
> if (ret)
> goto spi_geni_probe_runtime_disable;
> @@ -1092,7 +1137,7 @@ static int spi_geni_probe(struct platform_device *pdev)
> * for dma (gsi) mode, the gsi will set cs based on params passed in
> * TRE
> */
> - if (mas->cur_xfer_mode == GENI_SE_FIFO)
> + if (!spi->slave && mas->cur_xfer_mode == GENI_SE_FIFO)
> spi->set_cs = spi_geni_set_cs;
>
> ret = request_irq(mas->irq, geni_spi_isr, 0, dev_name(dev), spi);
> --
> 2.17.1
>
--
With best wishes
Dmitry
Hi,
On 7/6/2023 12:09 PM, Dmitry Baryshkov wrote:
> On Thu, 6 Jul 2023 at 08:12, Praveen Talari <[email protected]> wrote:
>> Currently spi geni driver supports only master mode operation.
>>
>> Add spi device mode support to GENI based QuPv3.
>>
>> Signed-off-by: Praveen Talari <[email protected]>
>> ---
>> v3 -> v4:
>> - Used existing property spi-slave.
>>
>> v2 -> v3:
>> - modified commit message to use device mode instead of slave mode
>>
>> v1 -> v2
>> - modified the commit message
>> - added the code changes for code comments
>> ---
>> drivers/spi/spi-geni-qcom.c | 57 +++++++++++++++++++++++++++++++++----
>> 1 file changed, 51 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c
>> index 206cc04bb1ed..4ec4fdee06b5 100644
>> --- a/drivers/spi/spi-geni-qcom.c
>> +++ b/drivers/spi/spi-geni-qcom.c
>> @@ -12,6 +12,7 @@
>> #include <linux/platform_device.h>
>> #include <linux/pm_opp.h>
>> #include <linux/pm_runtime.h>
>> +#include <linux/property.h>
>> #include <linux/soc/qcom/geni-se.h>
>> #include <linux/spi/spi.h>
>> #include <linux/spinlock.h>
>> @@ -52,6 +53,9 @@
>> #define SPI_CS_CLK_DELAY_MSK GENMASK(19, 10)
>> #define SPI_CS_CLK_DELAY_SHFT 10
>>
>> +#define SE_SPI_SLAVE_EN (0x2BC)
>> +#define SPI_SLAVE_EN BIT(0)
>> +
>> /* M_CMD OP codes for SPI */
>> #define SPI_TX_ONLY 1
>> #define SPI_RX_ONLY 2
>> @@ -99,6 +103,24 @@ struct spi_geni_master {
>> int cur_xfer_mode;
>> };
>>
>> +static struct spi_master *get_spi_master(struct device *dev)
>> +{
>> + struct platform_device *pdev = to_platform_device(dev);
>> + struct spi_master *spi = platform_get_drvdata(pdev);
> You can use dev_get_drvdata() directly, without going through platform_device.
Done
>
>> +
>> + return spi;
>> +}
>> +
>> +static void spi_slv_setup(struct spi_geni_master *mas)
>> +{
>> + struct geni_se *se = &mas->se;
>> +
>> + writel(SPI_SLAVE_EN, se->base + SE_SPI_SLAVE_EN);
>> + writel(GENI_IO_MUX_0_EN, se->base + GENI_OUTPUT_CTRL);
>> + writel(START_TRIGGER, se->base + SE_GENI_CFG_SEQ_START);
>> + dev_dbg(mas->dev, "spi slave setup done\n");
>> +}
>> +
>> static int get_spi_clk_cfg(unsigned int speed_hz,
>> struct spi_geni_master *mas,
>> unsigned int *clk_idx,
>> @@ -140,12 +162,18 @@ static void handle_se_timeout(struct spi_master *spi,
>> const struct spi_transfer *xfer;
>>
>> spin_lock_irq(&mas->lock);
>> - reinit_completion(&mas->cancel_done);
>> if (mas->cur_xfer_mode == GENI_SE_FIFO)
>> writel(0, se->base + SE_GENI_TX_WATERMARK_REG);
>>
>> xfer = mas->cur_xfer;
>> mas->cur_xfer = NULL;
>> +
>> + if (spi->slave) {
> A comment here would be nice.
Done
>
>> + spin_unlock_irq(&mas->lock);
>> + goto unmap_if_dma;
>> + }
>> +
>> + reinit_completion(&mas->cancel_done);
>> geni_se_cancel_m_cmd(se);
>> spin_unlock_irq(&mas->lock);
>>
>> @@ -542,6 +570,10 @@ static bool geni_can_dma(struct spi_controller *ctlr,
>> if (mas->cur_xfer_mode == GENI_GPI_DMA)
>> return true;
>>
>> + /* Set DMA mode for SPI slave. */
> SE DMA mode
Done
>
>> + if (ctlr->slave)
>> + return true;
>> +
>> len = get_xfer_len_in_words(xfer, mas);
>> fifo_size = mas->tx_fifo_depth * mas->fifo_width_bits / mas->cur_bits_per_word;
>>
>> @@ -619,6 +651,7 @@ static void spi_geni_release_dma_chan(struct spi_geni_master *mas)
>>
>> static int spi_geni_init(struct spi_geni_master *mas)
>> {
>> + struct spi_master *spi = get_spi_master(mas->dev);
>> struct geni_se *se = &mas->se;
>> unsigned int proto, major, minor, ver;
>> u32 spi_tx_cfg, fifo_disable;
>> @@ -627,7 +660,14 @@ static int spi_geni_init(struct spi_geni_master *mas)
>> pm_runtime_get_sync(mas->dev);
>>
>> proto = geni_se_read_proto(se);
>> - if (proto != GENI_SE_SPI) {
>> +
>> + if (spi->slave) {
>> + if (proto != GENI_SE_SPI_SLAVE) {
>> + dev_err(mas->dev, "Invalid proto %d\n", proto);
>> + goto out_pm;
>> + }
>> + spi_slv_setup(mas);
>> + } else if (proto != GENI_SE_SPI) {
>> dev_err(mas->dev, "Invalid proto %d\n", proto);
>> goto out_pm;
>> }
>> @@ -677,9 +717,11 @@ static int spi_geni_init(struct spi_geni_master *mas)
>> }
>>
>> /* We always control CS manually */
>> - spi_tx_cfg = readl(se->base + SE_SPI_TRANS_CFG);
>> - spi_tx_cfg &= ~CS_TOGGLE;
>> - writel(spi_tx_cfg, se->base + SE_SPI_TRANS_CFG);
>> + if (!spi->slave) {
>> + spi_tx_cfg = readl(se->base + SE_SPI_TRANS_CFG);
>> + spi_tx_cfg &= ~CS_TOGGLE;
>> + writel(spi_tx_cfg, se->base + SE_SPI_TRANS_CFG);
>> + }
>>
>> out_pm:
>> pm_runtime_put(mas->dev);
>> @@ -1072,6 +1114,9 @@ static int spi_geni_probe(struct platform_device *pdev)
>> pm_runtime_set_autosuspend_delay(&pdev->dev, 250);
>> pm_runtime_enable(dev);
>>
>> + if (device_property_read_bool(&pdev->dev, "spi-slave"))
>> + spi->slave = true;
>> +
>> ret = geni_icc_get(&mas->se, NULL);
>> if (ret)
>> goto spi_geni_probe_runtime_disable;
>> @@ -1092,7 +1137,7 @@ static int spi_geni_probe(struct platform_device *pdev)
>> * for dma (gsi) mode, the gsi will set cs based on params passed in
>> * TRE
>> */
>> - if (mas->cur_xfer_mode == GENI_SE_FIFO)
>> + if (!spi->slave && mas->cur_xfer_mode == GENI_SE_FIFO)
>> spi->set_cs = spi_geni_set_cs;
>>
>> ret = request_irq(mas->irq, geni_spi_isr, 0, dev_name(dev), spi);
>> --
>> 2.17.1
>>
>