diff options
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/misc/Makefile | 3 | ||||
| -rw-r--r-- | drivers/misc/reset-uclass.c | 81 | ||||
| -rw-r--r-- | drivers/misc/reset_sandbox.c | 100 | ||||
| -rw-r--r-- | drivers/misc/syscon_sandbox.c | 27 |
5 files changed, 220 insertions, 0 deletions
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 64b07a3015..3b7f76ab78 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -73,3 +73,12 @@ config PCA9551_I2C_ADDR default 0x60 help The I2C address of the PCA9551 LED controller. + +config RESET + bool "Enable support for reset drivers" + depends on DM + help + Enable reset drivers which can be used to reset the CPU or board. + Each driver can provide a reset method which will be called to + effect a reset. The uclass will try all available drivers when + reset_walk() is called. diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index 120babc4b5..5218b91c0b 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -22,13 +22,16 @@ obj-$(CONFIG_MXC_OCOTP) += mxc_ocotp.o obj-$(CONFIG_MXS_OCOTP) += mxs_ocotp.o obj-$(CONFIG_NS87308) += ns87308.o obj-$(CONFIG_PDSP188x) += pdsp188x.o +obj-$(CONFIG_SANDBOX) += reset_sandbox.o ifdef CONFIG_DM_I2C obj-$(CONFIG_SANDBOX) += i2c_eeprom_emul.o endif obj-$(CONFIG_SMSC_LPC47M) += smsc_lpc47m.o obj-$(CONFIG_STATUS_LED) += status_led.o obj-$(CONFIG_SANDBOX) += swap_case.o +obj-$(CONFIG_SANDBOX) += syscon_sandbox.o obj-$(CONFIG_TWL4030_LED) += twl4030_led.o obj-$(CONFIG_FSL_IFC) += fsl_ifc.o obj-$(CONFIG_FSL_SEC_MON) += fsl_sec_mon.o obj-$(CONFIG_PCA9551_LED) += pca9551_led.o +obj-$(CONFIG_RESET) += reset-uclass.o diff --git a/drivers/misc/reset-uclass.c b/drivers/misc/reset-uclass.c new file mode 100644 index 0000000000..fdb5c6fcff --- /dev/null +++ b/drivers/misc/reset-uclass.c @@ -0,0 +1,81 @@ +/* + * Copyright (C) 2015 Google, Inc + * Written by Simon Glass <sjg@chromium.org> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <reset.h> +#include <dm.h> +#include <errno.h> +#include <regmap.h> +#include <dm/device-internal.h> +#include <dm/lists.h> +#include <dm/root.h> +#include <linux/err.h> + +int reset_request(struct udevice *dev, enum reset_t type) +{ + struct reset_ops *ops = reset_get_ops(dev); + + if (!ops->request) + return -ENOSYS; + + return ops->request(dev, type); +} + +int reset_walk(enum reset_t type) +{ + struct udevice *dev; + int ret = -ENOSYS; + + while (ret != -EINPROGRESS && type < RESET_COUNT) { + for (uclass_first_device(UCLASS_RESET, &dev); + dev; + uclass_next_device(&dev)) { + ret = reset_request(dev, type); + if (ret == -EINPROGRESS) + break; + } + type++; + } + + return ret; +} + +void reset_walk_halt(enum reset_t type) +{ + int ret; + + ret = reset_walk(type); + + /* Wait for the reset to take effect */ + if (ret == -EINPROGRESS) + mdelay(100); + + /* Still no reset? Give up */ + printf("Reset not supported on this platform\n"); + hang(); +} + +/** + * reset_cpu() - calls reset_walk(RESET_WARM) + */ +void reset_cpu(ulong addr) +{ + reset_walk_halt(RESET_WARM); +} + + +int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + reset_walk_halt(RESET_WARM); + + return 0; +} + +UCLASS_DRIVER(reset) = { + .id = UCLASS_RESET, + .name = "reset", +}; diff --git a/drivers/misc/reset_sandbox.c b/drivers/misc/reset_sandbox.c new file mode 100644 index 0000000000..917121bc5e --- /dev/null +++ b/drivers/misc/reset_sandbox.c @@ -0,0 +1,100 @@ +/* + * Copyright (c) 2015 Google, Inc + * Written by Simon Glass <sjg@chromium.org> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <reset.h> +#include <asm/state.h> +#include <asm/test.h> + +DECLARE_GLOBAL_DATA_PTR; + +static int sandbox_warm_reset_request(struct udevice *dev, enum reset_t type) +{ + struct sandbox_state *state = state_get_current(); + + switch (type) { + case RESET_WARM: + state->last_reset = type; + break; + default: + return -ENOSYS; + } + if (!state->reset_allowed[type]) + return -EACCES; + + return -EINPROGRESS; +} + +static int sandbox_reset_request(struct udevice *dev, enum reset_t type) +{ + struct sandbox_state *state = state_get_current(); + + /* + * If we have a device tree, the device we created from platform data + * (see the U_BOOT_DEVICE() declaration below) should not do anything. + * If we are that device, return an error. + */ + if (gd->fdt_blob && dev->of_offset == -1) + return -ENODEV; + + switch (type) { + case RESET_COLD: + state->last_reset = type; + break; + case RESET_POWER: + state->last_reset = type; + if (!state->reset_allowed[type]) + return -EACCES; + sandbox_exit(); + break; + default: + return -ENOSYS; + } + if (!state->reset_allowed[type]) + return -EACCES; + + return -EINPROGRESS; +} + +static struct reset_ops sandbox_reset_ops = { + .request = sandbox_reset_request, +}; + +static const struct udevice_id sandbox_reset_ids[] = { + { .compatible = "sandbox,reset" }, + { } +}; + +U_BOOT_DRIVER(reset_sandbox) = { + .name = "reset_sandbox", + .id = UCLASS_RESET, + .of_match = sandbox_reset_ids, + .ops = &sandbox_reset_ops, +}; + +static struct reset_ops sandbox_warm_reset_ops = { + .request = sandbox_warm_reset_request, +}; + +static const struct udevice_id sandbox_warm_reset_ids[] = { + { .compatible = "sandbox,warm-reset" }, + { } +}; + +U_BOOT_DRIVER(warm_reset_sandbox) = { + .name = "warm_reset_sandbox", + .id = UCLASS_RESET, + .of_match = sandbox_warm_reset_ids, + .ops = &sandbox_warm_reset_ops, +}; + +/* This is here in case we don't have a device tree */ +U_BOOT_DEVICE(reset_sandbox_non_fdt) = { + .name = "reset_sandbox", +}; diff --git a/drivers/misc/syscon_sandbox.c b/drivers/misc/syscon_sandbox.c new file mode 100644 index 0000000000..ccfab3ef98 --- /dev/null +++ b/drivers/misc/syscon_sandbox.c @@ -0,0 +1,27 @@ +/* + * Copyright (c) 2015 Google, Inc + * Written by Simon Glass <sjg@chromium.org> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <syscon.h> +#include <asm/test.h> +#include <dm/lists.h> + +DECLARE_GLOBAL_DATA_PTR; + +static const struct udevice_id sandbox_syscon_ids[] = { + { .compatible = "sandbox,syscon0", .data = SYSCON0 }, + { .compatible = "sandbox,syscon1", .data = SYSCON1 }, + { } +}; + +U_BOOT_DRIVER(sandbox_syscon) = { + .name = "sandbox_syscon", + .id = UCLASS_SYSCON, + .of_match = sandbox_syscon_ids, +}; |
