diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/Makefile | 1 | ||||
| -rw-r--r-- | drivers/remoteproc/Kconfig | 15 | ||||
| -rw-r--r-- | drivers/remoteproc/Makefile | 7 | ||||
| -rw-r--r-- | drivers/remoteproc/rproc-uclass.c | 417 |
5 files changed, 442 insertions, 0 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig index 63c92c594a..c02f3231e0 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -46,6 +46,8 @@ source "drivers/power/Kconfig" source "drivers/ram/Kconfig" +source "drivers/remoteproc/Kconfig" + source "drivers/rtc/Kconfig" source "drivers/serial/Kconfig" diff --git a/drivers/Makefile b/drivers/Makefile index 9d0a5959a8..1a30ad1d14 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -59,6 +59,7 @@ obj-y += pwm/ obj-y += input/ # SOC specific infrastructure drivers. obj-y += soc/ +obj-$(CONFIG_REMOTEPROC) += remoteproc/ obj-y += thermal/ endif diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig new file mode 100644 index 0000000000..444682624a --- /dev/null +++ b/drivers/remoteproc/Kconfig @@ -0,0 +1,15 @@ +# +# (C) Copyright 2015 +# Texas Instruments Incorporated - http://www.ti.com/ +# SPDX-License-Identifier: GPL-2.0+ +# + +menu "Remote Processor drivers" + +# REMOTEPROC gets selected by drivers as needed +# All users should depend on DM +config REMOTEPROC + bool + depends on DM + +endmenu diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile new file mode 100644 index 0000000000..14c27929b6 --- /dev/null +++ b/drivers/remoteproc/Makefile @@ -0,0 +1,7 @@ +# +# (C) Copyright 2015 +# Texas Instruments Incorporated - http://www.ti.com/ +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-$(CONFIG_REMOTEPROC) += rproc-uclass.o diff --git a/drivers/remoteproc/rproc-uclass.c b/drivers/remoteproc/rproc-uclass.c new file mode 100644 index 0000000000..a421e12e5d --- /dev/null +++ b/drivers/remoteproc/rproc-uclass.c @@ -0,0 +1,417 @@ +/* + * (C) Copyright 2015 + * Texas Instruments Incorporated - http://www.ti.com/ + * SPDX-License-Identifier: GPL-2.0+ + */ +#define pr_fmt(fmt) "%s: " fmt, __func__ +#include <common.h> +#include <errno.h> +#include <fdtdec.h> +#include <malloc.h> +#include <remoteproc.h> +#include <asm/io.h> +#include <dm/device-internal.h> +#include <dm.h> +#include <dm/uclass.h> +#include <dm/uclass-internal.h> + +DECLARE_GLOBAL_DATA_PTR; + +/** + * for_each_remoteproc_device() - iterate through the list of rproc devices + * @fn: check function to call per match, if this function returns fail, + * iteration is aborted with the resultant error value + * @skip_dev: Device to skip calling the callback about. + * @data: Data to pass to the callback function + * + * Return: 0 if none of the callback returned a non 0 result, else returns the + * result from the callback function + */ +static int for_each_remoteproc_device(int (*fn) (struct udevice *dev, + struct dm_rproc_uclass_pdata *uc_pdata, + const void *data), + struct udevice *skip_dev, + const void *data) +{ + struct udevice *dev; + struct dm_rproc_uclass_pdata *uc_pdata; + int ret; + + for (ret = uclass_find_first_device(UCLASS_REMOTEPROC, &dev); dev; + ret = uclass_find_next_device(&dev)) { + if (ret || dev == skip_dev) + continue; + uc_pdata = dev_get_uclass_platdata(dev); + ret = fn(dev, uc_pdata, data); + if (ret) + return ret; + } + + return 0; +} + +/** + * _rproc_name_is_unique() - iteration helper to check if rproc name is unique + * @dev: device that we are checking name for + * @uc_pdata: uclass platform data + * @data: compare data (this is the name we want to ensure is unique) + * + * Return: 0 is there is no match(is unique); if there is a match(we dont + * have a unique name), return -EINVAL. + */ +static int _rproc_name_is_unique(struct udevice *dev, + struct dm_rproc_uclass_pdata *uc_pdata, + const void *data) +{ + const char *check_name = data; + + /* devices not yet populated with data - so skip them */ + if (!uc_pdata->name && check_name) + return 0; + + /* Return 0 to search further if we dont match */ + if (strlen(uc_pdata->name) != strlen(check_name)) + return 0; + + if (!strcmp(uc_pdata->name, check_name)) + return -EINVAL; + + return 0; +} + +/** + * rproc_name_is_unique() - Check if the rproc name is unique + * @check_dev: Device we are attempting to ensure is unique + * @check_name: Name we are trying to ensure is unique. + * + * Return: true if we have a unique name, false if name is not unique. + */ +static bool rproc_name_is_unique(struct udevice *check_dev, + const char *check_name) +{ + int ret; + + ret = for_each_remoteproc_device(_rproc_name_is_unique, + check_dev, check_name); + return ret ? false : true; +} + +/** + * rproc_pre_probe() - Pre probe accessor for the uclass + * @dev: device for which we are preprobing + * + * Parses and fills up the uclass pdata for use as needed by core and + * remote proc drivers. + * + * Return: 0 if all wernt ok, else appropriate error value. + */ +static int rproc_pre_probe(struct udevice *dev) +{ + struct dm_rproc_uclass_pdata *uc_pdata; + const struct dm_rproc_ops *ops; + + uc_pdata = dev_get_uclass_platdata(dev); + + /* See if we need to populate via fdt */ + + if (!dev->platdata) { +#if CONFIG_IS_ENABLED(OF_CONTROL) + int node = dev->of_offset; + const void *blob = gd->fdt_blob; + bool tmp; + if (!blob) { + debug("'%s' no dt?\n", dev->name); + return -EINVAL; + } + debug("'%s': using fdt\n", dev->name); + uc_pdata->name = fdt_getprop(blob, node, + "remoteproc-name", NULL); + + /* Default is internal memory mapped */ + uc_pdata->mem_type = RPROC_INTERNAL_MEMORY_MAPPED; + tmp = fdtdec_get_bool(blob, node, + "remoteproc-internal-memory-mapped"); + if (tmp) + uc_pdata->mem_type = RPROC_INTERNAL_MEMORY_MAPPED; +#else + /* Nothing much we can do about this, can we? */ + return -EINVAL; +#endif + + } else { + struct dm_rproc_uclass_pdata *pdata = dev->platdata; + + debug("'%s': using legacy data\n", dev->name); + if (pdata->name) + uc_pdata->name = pdata->name; + uc_pdata->mem_type = pdata->mem_type; + uc_pdata->driver_plat_data = pdata->driver_plat_data; + } + + /* Else try using device Name */ + if (!uc_pdata->name) + uc_pdata->name = dev->name; + if (!uc_pdata->name) { + debug("Unnamed device!"); + return -EINVAL; + } + + if (!rproc_name_is_unique(dev, uc_pdata->name)) { + debug("%s duplicate name '%s'\n", dev->name, uc_pdata->name); + return -EINVAL; + } + + ops = rproc_get_ops(dev); + if (!ops) { + debug("%s driver has no ops?\n", dev->name); + return -EINVAL; + } + + if (!ops->load || !ops->start) { + debug("%s driver has missing mandatory ops?\n", dev->name); + return -EINVAL; + } + + return 0; +} + +/** + * rproc_post_probe() - post probe accessor for the uclass + * @dev: deivce we finished probing + * + * initiate init function after the probe is completed. This allows + * the remote processor drivers to split up the initializations between + * probe and init as needed. + * + * Return: if the remote proc driver has a init routine, invokes it and + * hands over the return value. overall, 0 if all went well, else appropriate + * error value. + */ +static int rproc_post_probe(struct udevice *dev) +{ + const struct dm_rproc_ops *ops; + + ops = rproc_get_ops(dev); + if (!ops) { + debug("%s driver has no ops?\n", dev->name); + return -EINVAL; + } + + if (ops->init) + return ops->init(dev); + + return 0; +} + +UCLASS_DRIVER(rproc) = { + .id = UCLASS_REMOTEPROC, + .name = "remoteproc", + .flags = DM_UC_FLAG_SEQ_ALIAS, + .pre_probe = rproc_pre_probe, + .post_probe = rproc_post_probe, + .per_device_platdata_auto_alloc_size = + sizeof(struct dm_rproc_uclass_pdata), +}; + +/* Remoteproc subsystem access functions */ +/** + * _rproc_probe_dev() - iteration helper to probe a rproc device + * @dev: device to probe + * @uc_pdata: uclass data allocated for the device + * @data: unused + * + * Return: 0 if all ok, else appropriate error value. + */ +static int _rproc_probe_dev(struct udevice *dev, + struct dm_rproc_uclass_pdata *uc_pdata, + const void *data) +{ + int ret; + + ret = device_probe(dev); + + if (ret) + debug("%s: Failed to initialize - %d\n", dev->name, ret); + return ret; +} + +/** + * _rproc_dev_is_probed() - check if the device has been probed + * @dev: device to check + * @uc_pdata: unused + * @data: unused + * + * Return: -EAGAIN if not probed else return 0 + */ +static int _rproc_dev_is_probed(struct udevice *dev, + struct dm_rproc_uclass_pdata *uc_pdata, + const void *data) +{ + if (dev->flags & DM_FLAG_ACTIVATED) + return 0; + + return -EAGAIN; +} + +bool rproc_is_initialized(void) +{ + int ret = for_each_remoteproc_device(_rproc_dev_is_probed, NULL, NULL); + return ret ? false : true; +} + +int rproc_init(void) +{ + int ret; + + if (rproc_is_initialized()) { + debug("Already initialized\n"); + return -EINVAL; + } + + ret = for_each_remoteproc_device(_rproc_probe_dev, NULL, NULL); + return ret; +} + +int rproc_load(int id, ulong addr, ulong size) +{ + struct udevice *dev = NULL; + struct dm_rproc_uclass_pdata *uc_pdata; + const struct dm_rproc_ops *ops; + int ret; + + ret = uclass_get_device_by_seq(UCLASS_REMOTEPROC, id, &dev); + if (ret) { + debug("Unknown remote processor id '%d' requested(%d)\n", + id, ret); + return ret; + } + + uc_pdata = dev_get_uclass_platdata(dev); + + ops = rproc_get_ops(dev); + if (!ops) { + debug("%s driver has no ops?\n", dev->name); + return -EINVAL; + } + + debug("Loading to '%s' from address 0x%08lX size of %lu bytes\n", + uc_pdata->name, addr, size); + if (ops->load) + return ops->load(dev, addr, size); + + debug("%s: data corruption?? mandatory function is missing!\n", + dev->name); + + return -EINVAL; +}; + +/* + * Completely internal helper enums.. + * Keeping this isolated helps this code evolve independent of other + * parts.. + */ +enum rproc_ops { + RPROC_START, + RPROC_STOP, + RPROC_RESET, + RPROC_PING, + RPROC_RUNNING, +}; + +/** + * _rproc_ops_wrapper() - wrapper for invoking remote proc driver callback + * @id: id of the remote processor + * @op: one of rproc_ops that indicate what operation to invoke + * + * Most of the checks and verification for remoteproc operations are more + * or less same for almost all operations. This allows us to put a wrapper + * and use the common checks to allow the driver to function appropriately. + * + * Return: 0 if all ok, else appropriate error value. + */ +static int _rproc_ops_wrapper(int id, enum rproc_ops op) +{ + struct udevice *dev = NULL; + struct dm_rproc_uclass_pdata *uc_pdata; + const struct dm_rproc_ops *ops; + int (*fn)(struct udevice *dev); + bool mandatory = false; + char *op_str; + int ret; + + ret = uclass_get_device_by_seq(UCLASS_REMOTEPROC, id, &dev); + if (ret) { + debug("Unknown remote processor id '%d' requested(%d)\n", + id, ret); + return ret; + } + + uc_pdata = dev_get_uclass_platdata(dev); + + ops = rproc_get_ops(dev); + if (!ops) { + debug("%s driver has no ops?\n", dev->name); + return -EINVAL; + } + switch (op) { + case RPROC_START: + fn = ops->start; + mandatory = true; + op_str = "Starting"; + break; + case RPROC_STOP: + fn = ops->stop; + op_str = "Stopping"; + break; + case RPROC_RESET: + fn = ops->reset; + op_str = "Resetting"; + break; + case RPROC_RUNNING: + fn = ops->is_running; + op_str = "Checking if running:"; + break; + case RPROC_PING: + fn = ops->ping; + op_str = "Pinging"; + break; + default: + debug("what is '%d' operation??\n", op); + return -EINVAL; + } + + debug("%s %s...\n", op_str, uc_pdata->name); + if (fn) + return fn(dev); + + if (mandatory) + debug("%s: data corruption?? mandatory function is missing!\n", + dev->name); + + return -ENOSYS; +} + +int rproc_start(int id) +{ + return _rproc_ops_wrapper(id, RPROC_START); +}; + +int rproc_stop(int id) +{ + return _rproc_ops_wrapper(id, RPROC_STOP); +}; + +int rproc_reset(int id) +{ + return _rproc_ops_wrapper(id, RPROC_RESET); +}; + +int rproc_ping(int id) +{ + return _rproc_ops_wrapper(id, RPROC_PING); +}; + +int rproc_is_running(int id) +{ + return _rproc_ops_wrapper(id, RPROC_RUNNING); +}; |
