Commit 0211cc1e authored by Suman Anna's avatar Suman Anna Committed by Nishanth Menon
Browse files

soc: ti: pruss: Add helper functions to set GPI mode, MII_RT_event and XFR 



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: default avatarSuman Anna <s-anna@ti.com>
Co-developed-by: default avatarGrzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: default avatarGrzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: default avatarPuranjay Mohan <p-mohan@ti.com>
Reviewed-by: default avatarRoger Quadros <rogerq@kernel.org>
Reviewed-by: default avatarTony Lindgren <tony@atomide.com>
Reviewed-by: default avatarSimon Horman <simon.horman@corigine.com>
Reviewed-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: default avatarMD Danish Anwar <danishanwar@ti.com>
Link: https://lore.kernel.org/r/20230414045542.3249939-5-danishanwar@ti.com


Signed-off-by: default avatarNishanth Menon <nm@ti.com>
parent 51b5760e

drivers/remoteproc/pru_rproc.c

+0 −15
Original line number Diff line number Diff line
@@ -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)

drivers/soc/ti/pruss.c

+71 −0
Original line number Diff line number Diff line
@@ -213,6 +213,77 @@ 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 >= PRUSS_NUM_PRUS || 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;

include/linux/pruss_driver.h

+51 −0
Original line number Diff line number Diff line
@@ -32,6 +32,33 @@ 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,

	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,

	PRU_TYPE_RTU,

	PRU_TYPE_TX_PRU,

	PRU_TYPE_MAX,

};



/*

 * enum pruss_mem - PRUSS memory range identifiers

 */
@@ -86,6 +113,11 @@ 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
@@ -121,6 +153,25 @@ 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 */



#endif	/* _PRUSS_DRIVER_H_ */