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Davis" , Suman Anna , Roger Quadros , Vignesh Raghavendra , Tero Kristo , MD Danish Anwar , Mathieu Poirier , Bjorn Andersson , Santosh Shilimkar , Nishanth Menon CC: , , , , , , Subject: [PATCH v8 4/4] soc: ti: pruss: Add helper functions to set GPI mode, MII_RT_event and XFR Date: Wed, 12 Apr 2023 16:00:12 +0530 Message-ID: <20230412103012.1754161-5-danishanwar@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230412103012.1754161-1-danishanwar@ti.com> References: <20230412103012.1754161-1-danishanwar@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230412_033028_973810_514FC26A X-CRM114-Status: GOOD ( 18.93 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Suman Anna 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 Co-developed-by: Grzegorz Jaszczyk Signed-off-by: Grzegorz Jaszczyk Signed-off-by: Puranjay Mohan Reviewed-by: Roger Quadros Reviewed-by: Tony Lindgren Reviewed-by: Simon Horman Signed-off-by: MD Danish Anwar Reviewed-by: Mathieu Poirier --- drivers/remoteproc/pru_rproc.c | 15 ------- drivers/soc/ti/pruss.c | 74 ++++++++++++++++++++++++++++++++++ include/linux/pruss_driver.h | 51 +++++++++++++++++++++++ 3 files changed, 125 insertions(+), 15 deletions(-) diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c index 095f66130f48..54f5ce302e7a 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 34d513816a9d..90a625ab9cfc 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/pruss_driver.h b/include/linux/pruss_driver.h index c70e08c90165..2a139bfda452 100644 --- a/include/linux/pruss_driver.h +++ b/include/linux/pruss_driver.h @@ -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 = 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_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_ */