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

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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@ti.com>
Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Puranjay Mohan <p-mohan@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Link: https://lore.kernel.org/r/20230414045542.3249939-5-danishanwar@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>
This commit is contained in:
Suman Anna 2023-04-14 10:25:42 +05:30 committed by Nishanth Menon
parent 51b5760e56
commit 0211cc1e4f
3 changed files with 122 additions and 15 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

15
drivers/remoteproc/pru_rproc.c
View file

@ -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)

71
drivers/soc/ti/pruss.c
View file

@ -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;

51
include/linux/pruss_driver.h
View file

@ -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_ */