| Message ID | 20230404115336.599430-4-danishanwar@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Introduce PRU platform consumer API | expand |
On Tue, Apr 04, 2023 at 05:23:35PM +0530, MD Danish Anwar wrote: > From: Suman Anna <s-anna@ti.com> > > Add two new generic API pruss_cfg_read() and pruss_cfg_update() to > the PRUSS platform driver to read and program respectively a register > within the PRUSS CFG sub-module represented by a syscon driver. These > APIs are internal to PRUSS driver. > > Add two new helper functions pruss_cfg_get_gpmux() & pruss_cfg_set_gpmux() > to get and set the GP MUX mode for programming the PRUSS internal wrapper > mux functionality as needed by usecases. > > Various useful registers and macros for certain register bit-fields and > their values have also been added. > > 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> > Signed-off-by: MD Danish Anwar <danishanwar@ti.com> > --- > drivers/soc/ti/pruss.c | 45 ++++++++++++++++ > drivers/soc/ti/pruss.h | 88 ++++++++++++++++++++++++++++++++ > include/linux/remoteproc/pruss.h | 32 ++++++++++++ > 3 files changed, 165 insertions(+) > create mode 100644 drivers/soc/ti/pruss.h > > diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c > index 7aa0f7171af1..0e37fe142615 100644 > --- a/drivers/soc/ti/pruss.c > +++ b/drivers/soc/ti/pruss.c > @@ -21,6 +21,7 @@ > #include <linux/regmap.h> > #include <linux/remoteproc.h> > #include <linux/slab.h> > +#include "pruss.h" > > /** > * struct pruss_private_data - PRUSS driver private data > @@ -168,6 +169,50 @@ int pruss_release_mem_region(struct pruss *pruss, > } > EXPORT_SYMBOL_GPL(pruss_release_mem_region); > > +/** > + * pruss_cfg_get_gpmux() - get the current GPMUX value for a PRU device > + * @pruss: pruss instance > + * @pru_id: PRU identifier (0-1) > + * @mux: pointer to store the current mux value into > + w > + * Return: 0 on success, or an error code otherwise > + */ > +int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux) > +{ > + int ret = 0; > + u32 val; > + > + if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS || !mux) > + return -EINVAL; > + > + ret = pruss_cfg_read(pruss, PRUSS_CFG_GPCFG(pru_id), &val); > + if (!ret) > + *mux = (u8)((val & PRUSS_GPCFG_PRU_MUX_SEL_MASK) >> > + PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); > + return ret; > +} > +EXPORT_SYMBOL_GPL(pruss_cfg_get_gpmux); > + > +/** > + * pruss_cfg_set_gpmux() - set the GPMUX value for a PRU device > + * @pruss: pruss instance > + * @pru_id: PRU identifier (0-1) > + * @mux: new mux value for PRU > + * > + * Return: 0 on success, or an error code otherwise > + */ > +int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux) > +{ > + if (mux >= PRUSS_GP_MUX_SEL_MAX || > + pru_id < 0 || pru_id >= PRUSS_NUM_PRUS) > + return -EINVAL; > + > + return pruss_cfg_update(pruss, PRUSS_CFG_GPCFG(pru_id), > + PRUSS_GPCFG_PRU_MUX_SEL_MASK, > + (u32)mux << PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); > +} > +EXPORT_SYMBOL_GPL(pruss_cfg_set_gpmux); > + These stay here. > static void pruss_of_free_clk_provider(void *data) > { > struct device_node *clk_mux_np = data; > diff --git a/drivers/soc/ti/pruss.h b/drivers/soc/ti/pruss.h > new file mode 100644 > index 000000000000..6c55987e0e55 > --- /dev/null > +++ b/drivers/soc/ti/pruss.h > @@ -0,0 +1,88 @@ > +/* SPDX-License-Identifier: GPL-2.0-only */ > +/* > + * PRU-ICSS Subsystem user interfaces > + * > + * Copyright (C) 2015-2023 Texas Instruments Incorporated - http://www.ti.com > + * MD Danish Anwar <danishanwar@ti.com> > + */ > + > +#ifndef _SOC_TI_PRUSS_H_ > +#define _SOC_TI_PRUSS_H_ > + > +#include <linux/bits.h> > +#include <linux/regmap.h> > + > +/* > + * PRU_ICSS_CFG registers > + * SYSCFG, ISRP, ISP, IESP, IECP, SCRP applicable on AMxxxx devices only > + */ > +#define PRUSS_CFG_REVID 0x00 > +#define PRUSS_CFG_SYSCFG 0x04 > +#define PRUSS_CFG_GPCFG(x) (0x08 + (x) * 4) > +#define PRUSS_CFG_CGR 0x10 > +#define PRUSS_CFG_ISRP 0x14 > +#define PRUSS_CFG_ISP 0x18 > +#define PRUSS_CFG_IESP 0x1C > +#define PRUSS_CFG_IECP 0x20 > +#define PRUSS_CFG_SCRP 0x24 > +#define PRUSS_CFG_PMAO 0x28 > +#define PRUSS_CFG_MII_RT 0x2C > +#define PRUSS_CFG_IEPCLK 0x30 > +#define PRUSS_CFG_SPP 0x34 > +#define PRUSS_CFG_PIN_MX 0x40 > + > +/* PRUSS_GPCFG register bits */ > +#define PRUSS_GPCFG_PRU_GPI_MODE_MASK GENMASK(1, 0) > +#define PRUSS_GPCFG_PRU_GPI_MODE_SHIFT 0 > + > +#define PRUSS_GPCFG_PRU_MUX_SEL_SHIFT 26 > +#define PRUSS_GPCFG_PRU_MUX_SEL_MASK GENMASK(29, 26) > + > +/* PRUSS_MII_RT register bits */ > +#define PRUSS_MII_RT_EVENT_EN BIT(0) > + > +/* PRUSS_SPP register bits */ > +#define PRUSS_SPP_XFER_SHIFT_EN BIT(1) > +#define PRUSS_SPP_PRU1_PAD_HP_EN BIT(0) > +#define PRUSS_SPP_RTU_XFR_SHIFT_EN BIT(3) > + > +/** > + * pruss_cfg_read() - read a PRUSS CFG sub-module register > + * @pruss: the pruss instance handle > + * @reg: register offset within the CFG sub-module > + * @val: pointer to return the value in > + * > + * Reads a given register within the PRUSS CFG sub-module and > + * returns it through the passed-in @val pointer > + * > + * Return: 0 on success, or an error code otherwise > + */ > +static int pruss_cfg_read(struct pruss *pruss, unsigned int reg, unsigned int *val) > +{ > + if (IS_ERR_OR_NULL(pruss)) > + return -EINVAL; > + > + return regmap_read(pruss->cfg_regmap, reg, val); > +} > + > +/** > + * pruss_cfg_update() - configure a PRUSS CFG sub-module register > + * @pruss: the pruss instance handle > + * @reg: register offset within the CFG sub-module > + * @mask: bit mask to use for programming the @val > + * @val: value to write > + * > + * Programs a given register within the PRUSS CFG sub-module > + * > + * Return: 0 on success, or an error code otherwise > + */ > +static int pruss_cfg_update(struct pruss *pruss, unsigned int reg, > + unsigned int mask, unsigned int val) > +{ > + if (IS_ERR_OR_NULL(pruss)) > + return -EINVAL; > + > + return regmap_update_bits(pruss->cfg_regmap, reg, mask, val); > +} > + Everything in pruss.h is ok. > +#endif /* _SOC_TI_PRUSS_H_ */ > diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h > index 33f930e0a0ce..5641153459a7 100644 > --- a/include/linux/remoteproc/pruss.h > +++ b/include/linux/remoteproc/pruss.h > @@ -16,6 +16,24 @@ > > #define PRU_RPROC_DRVNAME "pru-rproc" > > +/* > + * enum pruss_gp_mux_sel - PRUSS GPI/O Mux modes for the > + * PRUSS_GPCFG0/1 registers > + * > + * NOTE: The below defines are the most common values, but there > + * are some exceptions like on 66AK2G, where the RESERVED and MII2 > + * values are interchanged. Also, this bit-field does not exist on > + * AM335x SoCs > + */ > +enum pruss_gp_mux_sel { > + PRUSS_GP_MUX_SEL_GP = 0, > + PRUSS_GP_MUX_SEL_ENDAT, > + PRUSS_GP_MUX_SEL_RESERVED, > + PRUSS_GP_MUX_SEL_SD, > + PRUSS_GP_MUX_SEL_MII2, > + PRUSS_GP_MUX_SEL_MAX, > +}; > + > /** > * enum pruss_pru_id - PRU core identifiers > * @PRUSS_PRU0: PRU Core 0. > @@ -78,6 +96,8 @@ int pruss_request_mem_region(struct pruss *pruss, enum pruss_mem mem_id, > struct pruss_mem_region *region); > 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); > > #else > > @@ -101,6 +121,18 @@ static inline int pruss_release_mem_region(struct pruss *pruss, > return -EOPNOTSUPP; > } > > +static inline int pruss_cfg_get_gpmux(struct pruss *pruss, > + enum pruss_pru_id pru_id, u8 *mux) > +{ > + return ERR_PTR(-EOPNOTSUPP); > +} > + > +static inline int pruss_cfg_set_gpmux(struct pruss *pruss, > + enum pruss_pru_id pru_id, u8 mux) > +{ > + return ERR_PTR(-EOPNOTSUPP); > +} > + All of this goes in pruss_driver.h > #endif /* CONFIG_TI_PRUSS */ > > #if IS_ENABLED(CONFIG_PRU_REMOTEPROC) > -- > 2.25.1 >
diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c index 7aa0f7171af1..0e37fe142615 100644 --- a/drivers/soc/ti/pruss.c +++ b/drivers/soc/ti/pruss.c @@ -21,6 +21,7 @@ #include <linux/regmap.h> #include <linux/remoteproc.h> #include <linux/slab.h> +#include "pruss.h" /** * struct pruss_private_data - PRUSS driver private data @@ -168,6 +169,50 @@ int pruss_release_mem_region(struct pruss *pruss, } EXPORT_SYMBOL_GPL(pruss_release_mem_region); +/** + * pruss_cfg_get_gpmux() - get the current GPMUX value for a PRU device + * @pruss: pruss instance + * @pru_id: PRU identifier (0-1) + * @mux: pointer to store the current mux value into + * + * Return: 0 on success, or an error code otherwise + */ +int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux) +{ + int ret = 0; + u32 val; + + if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS || !mux) + return -EINVAL; + + ret = pruss_cfg_read(pruss, PRUSS_CFG_GPCFG(pru_id), &val); + if (!ret) + *mux = (u8)((val & PRUSS_GPCFG_PRU_MUX_SEL_MASK) >> + PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); + return ret; +} +EXPORT_SYMBOL_GPL(pruss_cfg_get_gpmux); + +/** + * pruss_cfg_set_gpmux() - set the GPMUX value for a PRU device + * @pruss: pruss instance + * @pru_id: PRU identifier (0-1) + * @mux: new mux value for PRU + * + * Return: 0 on success, or an error code otherwise + */ +int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux) +{ + if (mux >= PRUSS_GP_MUX_SEL_MAX || + pru_id < 0 || pru_id >= PRUSS_NUM_PRUS) + return -EINVAL; + + return pruss_cfg_update(pruss, PRUSS_CFG_GPCFG(pru_id), + PRUSS_GPCFG_PRU_MUX_SEL_MASK, + (u32)mux << PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); +} +EXPORT_SYMBOL_GPL(pruss_cfg_set_gpmux); + static void pruss_of_free_clk_provider(void *data) { struct device_node *clk_mux_np = data; diff --git a/drivers/soc/ti/pruss.h b/drivers/soc/ti/pruss.h new file mode 100644 index 000000000000..6c55987e0e55 --- /dev/null +++ b/drivers/soc/ti/pruss.h @@ -0,0 +1,88 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * PRU-ICSS Subsystem user interfaces + * + * Copyright (C) 2015-2023 Texas Instruments Incorporated - http://www.ti.com + * MD Danish Anwar <danishanwar@ti.com> + */ + +#ifndef _SOC_TI_PRUSS_H_ +#define _SOC_TI_PRUSS_H_ + +#include <linux/bits.h> +#include <linux/regmap.h> + +/* + * PRU_ICSS_CFG registers + * SYSCFG, ISRP, ISP, IESP, IECP, SCRP applicable on AMxxxx devices only + */ +#define PRUSS_CFG_REVID 0x00 +#define PRUSS_CFG_SYSCFG 0x04 +#define PRUSS_CFG_GPCFG(x) (0x08 + (x) * 4) +#define PRUSS_CFG_CGR 0x10 +#define PRUSS_CFG_ISRP 0x14 +#define PRUSS_CFG_ISP 0x18 +#define PRUSS_CFG_IESP 0x1C +#define PRUSS_CFG_IECP 0x20 +#define PRUSS_CFG_SCRP 0x24 +#define PRUSS_CFG_PMAO 0x28 +#define PRUSS_CFG_MII_RT 0x2C +#define PRUSS_CFG_IEPCLK 0x30 +#define PRUSS_CFG_SPP 0x34 +#define PRUSS_CFG_PIN_MX 0x40 + +/* PRUSS_GPCFG register bits */ +#define PRUSS_GPCFG_PRU_GPI_MODE_MASK GENMASK(1, 0) +#define PRUSS_GPCFG_PRU_GPI_MODE_SHIFT 0 + +#define PRUSS_GPCFG_PRU_MUX_SEL_SHIFT 26 +#define PRUSS_GPCFG_PRU_MUX_SEL_MASK GENMASK(29, 26) + +/* PRUSS_MII_RT register bits */ +#define PRUSS_MII_RT_EVENT_EN BIT(0) + +/* PRUSS_SPP register bits */ +#define PRUSS_SPP_XFER_SHIFT_EN BIT(1) +#define PRUSS_SPP_PRU1_PAD_HP_EN BIT(0) +#define PRUSS_SPP_RTU_XFR_SHIFT_EN BIT(3) + +/** + * pruss_cfg_read() - read a PRUSS CFG sub-module register + * @pruss: the pruss instance handle + * @reg: register offset within the CFG sub-module + * @val: pointer to return the value in + * + * Reads a given register within the PRUSS CFG sub-module and + * returns it through the passed-in @val pointer + * + * Return: 0 on success, or an error code otherwise + */ +static int pruss_cfg_read(struct pruss *pruss, unsigned int reg, unsigned int *val) +{ + if (IS_ERR_OR_NULL(pruss)) + return -EINVAL; + + return regmap_read(pruss->cfg_regmap, reg, val); +} + +/** + * pruss_cfg_update() - configure a PRUSS CFG sub-module register + * @pruss: the pruss instance handle + * @reg: register offset within the CFG sub-module + * @mask: bit mask to use for programming the @val + * @val: value to write + * + * Programs a given register within the PRUSS CFG sub-module + * + * Return: 0 on success, or an error code otherwise + */ +static int pruss_cfg_update(struct pruss *pruss, unsigned int reg, + unsigned int mask, unsigned int val) +{ + if (IS_ERR_OR_NULL(pruss)) + return -EINVAL; + + return regmap_update_bits(pruss->cfg_regmap, reg, mask, val); +} + +#endif /* _SOC_TI_PRUSS_H_ */ diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h index 33f930e0a0ce..5641153459a7 100644 --- a/include/linux/remoteproc/pruss.h +++ b/include/linux/remoteproc/pruss.h @@ -16,6 +16,24 @@ #define PRU_RPROC_DRVNAME "pru-rproc" +/* + * enum pruss_gp_mux_sel - PRUSS GPI/O Mux modes for the + * PRUSS_GPCFG0/1 registers + * + * NOTE: The below defines are the most common values, but there + * are some exceptions like on 66AK2G, where the RESERVED and MII2 + * values are interchanged. Also, this bit-field does not exist on + * AM335x SoCs + */ +enum pruss_gp_mux_sel { + PRUSS_GP_MUX_SEL_GP = 0, + PRUSS_GP_MUX_SEL_ENDAT, + PRUSS_GP_MUX_SEL_RESERVED, + PRUSS_GP_MUX_SEL_SD, + PRUSS_GP_MUX_SEL_MII2, + PRUSS_GP_MUX_SEL_MAX, +}; + /** * enum pruss_pru_id - PRU core identifiers * @PRUSS_PRU0: PRU Core 0. @@ -78,6 +96,8 @@ int pruss_request_mem_region(struct pruss *pruss, enum pruss_mem mem_id, struct pruss_mem_region *region); 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); #else @@ -101,6 +121,18 @@ static inline int pruss_release_mem_region(struct pruss *pruss, return -EOPNOTSUPP; } +static inline int pruss_cfg_get_gpmux(struct pruss *pruss, + enum pruss_pru_id pru_id, u8 *mux) +{ + return ERR_PTR(-EOPNOTSUPP); +} + +static inline int pruss_cfg_set_gpmux(struct pruss *pruss, + enum pruss_pru_id pru_id, u8 mux) +{ + return ERR_PTR(-EOPNOTSUPP); +} + #endif /* CONFIG_TI_PRUSS */ #if IS_ENABLED(CONFIG_PRU_REMOTEPROC)