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/* SPDX-License-Identifier: GPL-2.0 */
/*
* PRU-ICSS sub-system specific definitions
*
* Copyright (C) 2014-2019 Texas Instruments Incorporated - http://www.ti.com/
* Suman Anna <s-anna@ti.com>
*/
#ifndef _PRUSS_DRIVER_H_
#define _PRUSS_DRIVER_H_
#include <linux/pruss.h>
/* maximum number of system events */
#define MAX_PRU_SYS_EVENTS 64
/* maximum number of interrupt channels */
#define MAX_PRU_CHANNELS 10
/* minimum starting host interrupt number for MPU */
#define MIN_PRU_HOST_INT 2
/* maximum number of host interrupts */
#define MAX_PRU_HOST_INT 10
/**
* struct pruss_intc_config - INTC configuration info
* @sysev_to_ch: system events to channel mapping information
* @ch_to_host: interrupt channel to host interrupt information
*/
struct pruss_intc_config {
s8 sysev_to_ch[MAX_PRU_SYS_EVENTS];
s8 ch_to_host[MAX_PRU_CHANNELS];
};
/**
* struct pruss - PRUSS parent structure
* @dev: pruss device pointer
* @cfg: regmap for config region
* @iep: regmap for IEP sub-module
* @mii_rt: regmap for MII_RT sub-module
* @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
*/
struct pruss {
struct device *dev;
struct regmap *cfg;
struct regmap *iep;
struct regmap *mii_rt;
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 */
};
int pruss_intc_configure(struct pruss *pruss,
struct pruss_intc_config *intc_config);
int pruss_intc_unconfigure(struct pruss *pruss,
struct pruss_intc_config *intc_config);
/**
* pruss_cfg_get_gpmux() - get the current GPMUX value for a PRU device
* @pruss: pruss instance
* @id: PRU identifier (0-1)
* @mux: pointer to store the current mux value into
*/
static inline int pruss_cfg_get_gpmux(struct pruss *pruss,
enum pruss_pru_id id, u8 *mux)
{
int ret = 0;
u32 val;
ret = pruss_regmap_read(pruss, PRUSS_SYSCON_CFG,
PRUSS_CFG_GPCFG(id), &val);
if (!ret)
*mux = (u8)((val & PRUSS_GPCFG_PRU_MUX_SEL_MASK) >>
PRUSS_GPCFG_PRU_MUX_SEL_SHIFT);
return ret;
}
/**
* 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
*/
static inline int pruss_cfg_set_gpmux(struct pruss *pruss,
enum pruss_pru_id id, u8 mux)
{
if (mux >= PRUSS_GP_MUX_SEL_MAX)
return -EINVAL;
return pruss_regmap_update(pruss, PRUSS_SYSCON_CFG, PRUSS_CFG_GPCFG(id),
PRUSS_GPCFG_PRU_MUX_SEL_MASK,
(u32)mux << PRUSS_GPCFG_PRU_MUX_SEL_SHIFT);
}
#endif /* _PRUSS_DRIVER_H_ */
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