[PATCH v6 4/4] soc: ti: pruss: Add helper functions to set GPI mode, MII_RT_event and XFR
MD Danish Anwar
danishanwar at ti.com
Fri Mar 31 04:29:41 PDT 2023
From: Suman Anna <s-anna at ti.com>
The PRUSS CFG module is represented as a syscon node and is currently
managed by the PRUSS platform driver. Add easy accessor functions to set
GPI mode, MII_RT event enable/disable and XFR (XIN XOUT) enable/disable
to enable the PRUSS Ethernet usecase. These functions reuse the generic
pruss_cfg_update() API function.
Signed-off-by: Suman Anna <s-anna at ti.com>
Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk at linaro.org>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk at linaro.org>
Signed-off-by: Puranjay Mohan <p-mohan at ti.com>
Reviewed-by: Roger Quadros <rogerq at kernel.org>
Reviewed-by: Tony Lindgren <tony at atomide.com>
Signed-off-by: MD Danish Anwar <danishanwar at ti.com>
---
drivers/remoteproc/pru_rproc.c | 15 -------
drivers/soc/ti/pruss.c | 74 ++++++++++++++++++++++++++++++++
include/linux/remoteproc/pruss.h | 51 ++++++++++++++++++++++
3 files changed, 125 insertions(+), 15 deletions(-)
diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
index 4ddd5854d56e..a88861737dec 100644
--- a/drivers/remoteproc/pru_rproc.c
+++ b/drivers/remoteproc/pru_rproc.c
@@ -81,21 +81,6 @@ enum pru_iomem {
PRU_IOMEM_MAX,
};
-/**
- * enum pru_type - PRU core type identifier
- *
- * @PRU_TYPE_PRU: Programmable Real-time Unit
- * @PRU_TYPE_RTU: Auxiliary Programmable Real-Time Unit
- * @PRU_TYPE_TX_PRU: Transmit Programmable Real-Time Unit
- * @PRU_TYPE_MAX: just keep this one at the end
- */
-enum pru_type {
- PRU_TYPE_PRU = 0,
- PRU_TYPE_RTU,
- PRU_TYPE_TX_PRU,
- PRU_TYPE_MAX,
-};
-
/**
* struct pru_private_data - device data for a PRU core
* @type: type of the PRU core (PRU, RTU, Tx_PRU)
diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c
index 0e37fe142615..64a1880ba4ee 100644
--- a/drivers/soc/ti/pruss.c
+++ b/drivers/soc/ti/pruss.c
@@ -213,6 +213,80 @@ int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux)
}
EXPORT_SYMBOL_GPL(pruss_cfg_set_gpmux);
+/**
+ * pruss_cfg_gpimode() - set the GPI mode of the PRU
+ * @pruss: the pruss instance handle
+ * @pru_id: id of the PRU core within the PRUSS
+ * @mode: GPI mode to set
+ *
+ * Sets the GPI mode for a given PRU by programming the
+ * corresponding PRUSS_CFG_GPCFGx register
+ *
+ * Return: 0 on success, or an error code otherwise
+ */
+int pruss_cfg_gpimode(struct pruss *pruss, enum pruss_pru_id pru_id,
+ enum pruss_gpi_mode mode)
+{
+ if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS)
+ return -EINVAL;
+
+ if (mode < 0 || mode > PRUSS_GPI_MODE_MAX)
+ return -EINVAL;
+
+ return pruss_cfg_update(pruss, PRUSS_CFG_GPCFG(pru_id),
+ PRUSS_GPCFG_PRU_GPI_MODE_MASK,
+ mode << PRUSS_GPCFG_PRU_GPI_MODE_SHIFT);
+}
+EXPORT_SYMBOL_GPL(pruss_cfg_gpimode);
+
+/**
+ * pruss_cfg_miirt_enable() - Enable/disable MII RT Events
+ * @pruss: the pruss instance
+ * @enable: enable/disable
+ *
+ * Enable/disable the MII RT Events for the PRUSS.
+ *
+ * Return: 0 on success, or an error code otherwise
+ */
+int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable)
+{
+ u32 set = enable ? PRUSS_MII_RT_EVENT_EN : 0;
+
+ return pruss_cfg_update(pruss, PRUSS_CFG_MII_RT,
+ PRUSS_MII_RT_EVENT_EN, set);
+}
+EXPORT_SYMBOL_GPL(pruss_cfg_miirt_enable);
+
+/**
+ * pruss_cfg_xfr_enable() - Enable/disable XIN XOUT shift functionality
+ * @pruss: the pruss instance
+ * @pru_type: PRU core type identifier
+ * @enable: enable/disable
+ *
+ * Return: 0 on success, or an error code otherwise
+ */
+int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type,
+ bool enable)
+{
+ u32 mask, set;
+
+ switch (pru_type) {
+ case PRU_TYPE_PRU:
+ mask = PRUSS_SPP_XFER_SHIFT_EN;
+ break;
+ case PRU_TYPE_RTU:
+ mask = PRUSS_SPP_RTU_XFR_SHIFT_EN;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ set = enable ? mask : 0;
+
+ return pruss_cfg_update(pruss, PRUSS_CFG_SPP, mask, set);
+}
+EXPORT_SYMBOL_GPL(pruss_cfg_xfr_enable);
+
static void pruss_of_free_clk_provider(void *data)
{
struct device_node *clk_mux_np = data;
diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h
index 5641153459a7..b68ab8735247 100644
--- a/include/linux/remoteproc/pruss.h
+++ b/include/linux/remoteproc/pruss.h
@@ -34,6 +34,33 @@ enum pruss_gp_mux_sel {
PRUSS_GP_MUX_SEL_MAX,
};
+/*
+ * enum pruss_gpi_mode - PRUSS GPI configuration modes, used
+ * to program the PRUSS_GPCFG0/1 registers
+ */
+enum pruss_gpi_mode {
+ PRUSS_GPI_MODE_DIRECT = 0,
+ PRUSS_GPI_MODE_PARALLEL,
+ PRUSS_GPI_MODE_28BIT_SHIFT,
+ PRUSS_GPI_MODE_MII,
+ PRUSS_GPI_MODE_MAX,
+};
+
+/**
+ * enum pru_type - PRU core type identifier
+ *
+ * @PRU_TYPE_PRU: Programmable Real-time Unit
+ * @PRU_TYPE_RTU: Auxiliary Programmable Real-Time Unit
+ * @PRU_TYPE_TX_PRU: Transmit Programmable Real-Time Unit
+ * @PRU_TYPE_MAX: just keep this one at the end
+ */
+enum pru_type {
+ PRU_TYPE_PRU = 0,
+ PRU_TYPE_RTU,
+ PRU_TYPE_TX_PRU,
+ PRU_TYPE_MAX,
+};
+
/**
* enum pruss_pru_id - PRU core identifiers
* @PRUSS_PRU0: PRU Core 0.
@@ -98,6 +125,11 @@ int pruss_release_mem_region(struct pruss *pruss,
struct pruss_mem_region *region);
int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux);
int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux);
+int pruss_cfg_gpimode(struct pruss *pruss, enum pruss_pru_id pru_id,
+ enum pruss_gpi_mode mode);
+int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable);
+int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type,
+ bool enable);
#else
@@ -133,6 +165,25 @@ static inline int pruss_cfg_set_gpmux(struct pruss *pruss,
return ERR_PTR(-EOPNOTSUPP);
}
+static inline int pruss_cfg_gpimode(struct pruss *pruss,
+ enum pruss_pru_id pru_id,
+ enum pruss_gpi_mode mode)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline int pruss_cfg_xfr_enable(struct pruss *pruss,
+ enum pru_type pru_type,
+ bool enable);
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
#endif /* CONFIG_TI_PRUSS */
#if IS_ENABLED(CONFIG_PRU_REMOTEPROC)
--
2.25.1
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