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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* PRU-ICSS sub-system specific definitions
*
* Copyright (C) 2014-2020 Texas Instruments Incorporated - http://www.ti.com/
* Suman Anna <[email protected]>
*/
#ifndef _PRUSS_DRIVER_H_
#define _PRUSS_DRIVER_H_
#include <linux/mutex.h>
#include <linux/remoteproc/pruss.h>
#include <linux/types.h>
#include <linux/err.h>
/*
* 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,
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_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
*/
enum pruss_mem {
PRUSS_MEM_DRAM0 = 0,
PRUSS_MEM_DRAM1,
PRUSS_MEM_SHRD_RAM2,
PRUSS_MEM_MAX,
};
/**
* struct pruss_mem_region - PRUSS memory region structure
* @va: kernel virtual address of the PRUSS memory region
* @pa: physical (bus) address of the PRUSS memory region
* @size: size of the PRUSS memory region
*/
struct pruss_mem_region {
void __iomem *va;
phys_addr_t pa;
size_t size;
};
/**
* struct pruss - PRUSS parent structure
* @dev: pruss device pointer
* @cfg_base: base iomap for CFG region
* @cfg_regmap: regmap for config region
* @mem_regions: data for each of the PRUSS memory regions
* @mem_in_use: to indicate if memory resource is in use
* @lock: mutex to serialize access to resources
* @core_clk_mux: clk handle for PRUSS CORE_CLK_MUX
* @iep_clk_mux: clk handle for PRUSS IEP_CLK_MUX
*/
struct pruss {
struct device *dev;
void __iomem *cfg_base;
struct regmap *cfg_regmap;
struct pruss_mem_region mem_regions[PRUSS_MEM_MAX];
struct pruss_mem_region *mem_in_use[PRUSS_MEM_MAX];
struct mutex lock; /* PRU resource lock */
struct clk *core_clk_mux;
struct clk *iep_clk_mux;
};
#if IS_ENABLED(CONFIG_TI_PRUSS)
struct pruss *pruss_get(struct rproc *rproc);
void pruss_put(struct pruss *pruss);
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);
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
static inline struct pruss *pruss_get(struct rproc *rproc)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline void pruss_put(struct pruss *pruss) { }
static inline int pruss_request_mem_region(struct pruss *pruss,
enum pruss_mem mem_id,
struct pruss_mem_region *region)
{
return -EOPNOTSUPP;
}
static inline int pruss_release_mem_region(struct pruss *pruss,
struct pruss_mem_region *region)
{
return -EOPNOTSUPP;
}
static inline int pruss_cfg_get_gpmux(struct pruss *pruss,
enum pruss_pru_id pru_id, u8 *mux)
{
return -EOPNOTSUPP;
}
static inline int pruss_cfg_set_gpmux(struct pruss *pruss,
enum pruss_pru_id pru_id, u8 mux)
{
return -EOPNOTSUPP;
}
static inline int pruss_cfg_gpimode(struct pruss *pruss,
enum pruss_pru_id pru_id,
enum pruss_gpi_mode mode)
{
return -EOPNOTSUPP;
}
static inline int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable)
{
return -EOPNOTSUPP;
}
static inline int pruss_cfg_xfr_enable(struct pruss *pruss,
enum pru_type pru_type,
bool enable)
{
return -EOPNOTSUPP;
}
#endif /* CONFIG_TI_PRUSS */
#endif /* _PRUSS_DRIVER_H_ */
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