diff options
Diffstat (limited to 'drivers/remoteproc')
| -rw-r--r-- | drivers/remoteproc/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/remoteproc/Makefile | 3 | ||||
| -rw-r--r-- | drivers/remoteproc/rproc-elf-loader.c | 106 | ||||
| -rw-r--r-- | drivers/remoteproc/sandbox_testproc.c | 19 | ||||
| -rw-r--r-- | drivers/remoteproc/stm32_copro.c | 257 |
5 files changed, 394 insertions, 1 deletions
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig index 9eb532bc7a..fa6f1113e1 100644 --- a/drivers/remoteproc/Kconfig +++ b/drivers/remoteproc/Kconfig @@ -40,6 +40,16 @@ config REMOTEPROC_SANDBOX Say 'y' here to add support for test processor which does dummy operations for sandbox platform. +config REMOTEPROC_STM32_COPRO + bool "Support for STM32 coprocessor" + select REMOTEPROC + depends on DM + depends on ARCH_STM32MP + depends on OF_CONTROL + help + Say 'y' here to add support for STM32 Cortex-M4 coprocessors via the + remoteproc framework. + config REMOTEPROC_TI_POWER bool "Support for TI Power processor" select REMOTEPROC diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile index 77eb708523..b9a06acdef 100644 --- a/drivers/remoteproc/Makefile +++ b/drivers/remoteproc/Makefile @@ -4,10 +4,11 @@ # Texas Instruments Incorporated - http://www.ti.com/ # -obj-$(CONFIG_$(SPL_)REMOTEPROC) += rproc-uclass.o +obj-$(CONFIG_$(SPL_)REMOTEPROC) += rproc-uclass.o rproc-elf-loader.o # Remote proc drivers - Please keep this list alphabetically sorted. obj-$(CONFIG_K3_SYSTEM_CONTROLLER) += k3_system_controller.o obj-$(CONFIG_REMOTEPROC_K3) += k3_rproc.o obj-$(CONFIG_REMOTEPROC_SANDBOX) += sandbox_testproc.o +obj-$(CONFIG_REMOTEPROC_STM32_COPRO) += stm32_copro.o obj-$(CONFIG_REMOTEPROC_TI_POWER) += ti_power_proc.o diff --git a/drivers/remoteproc/rproc-elf-loader.c b/drivers/remoteproc/rproc-elf-loader.c new file mode 100644 index 0000000000..67937a7595 --- /dev/null +++ b/drivers/remoteproc/rproc-elf-loader.c @@ -0,0 +1,106 @@ +// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause +/* + * Copyright (C) 2019, STMicroelectronics - All Rights Reserved + */ +#include <common.h> +#include <dm.h> +#include <elf.h> +#include <remoteproc.h> + +/* Basic function to verify ELF32 image format */ +int rproc_elf32_sanity_check(ulong addr, ulong size) +{ + Elf32_Ehdr *ehdr; + char class; + + if (!addr) { + pr_debug("Invalid fw address?\n"); + return -EFAULT; + } + + if (size < sizeof(Elf32_Ehdr)) { + pr_debug("Image is too small\n"); + return -ENOSPC; + } + + ehdr = (Elf32_Ehdr *)addr; + class = ehdr->e_ident[EI_CLASS]; + + if (!IS_ELF(*ehdr) || ehdr->e_type != ET_EXEC || class != ELFCLASS32) { + pr_debug("Not an executable ELF32 image\n"); + return -EPROTONOSUPPORT; + } + + /* We assume the firmware has the same endianness as the host */ +# ifdef __LITTLE_ENDIAN + if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB) { +# else /* BIG ENDIAN */ + if (ehdr->e_ident[EI_DATA] != ELFDATA2MSB) { +# endif + pr_debug("Unsupported firmware endianness\n"); + return -EILSEQ; + } + + if (size < ehdr->e_shoff + sizeof(Elf32_Shdr)) { + pr_debug("Image is too small\n"); + return -ENOSPC; + } + + if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) { + pr_debug("Image is corrupted (bad magic)\n"); + return -EBADF; + } + + if (ehdr->e_phnum == 0) { + pr_debug("No loadable segments\n"); + return -ENOEXEC; + } + + if (ehdr->e_phoff > size) { + pr_debug("Firmware size is too small\n"); + return -ENOSPC; + } + + return 0; +} + +/* A very simple elf loader, assumes the image is valid */ +int rproc_elf32_load_image(struct udevice *dev, unsigned long addr) +{ + Elf32_Ehdr *ehdr; /* Elf header structure pointer */ + Elf32_Phdr *phdr; /* Program header structure pointer */ + const struct dm_rproc_ops *ops; + unsigned int i; + + ehdr = (Elf32_Ehdr *)addr; + phdr = (Elf32_Phdr *)(addr + ehdr->e_phoff); + + ops = rproc_get_ops(dev); + + /* Load each program header */ + for (i = 0; i < ehdr->e_phnum; ++i) { + void *dst = (void *)(uintptr_t)phdr->p_paddr; + void *src = (void *)addr + phdr->p_offset; + + if (phdr->p_type != PT_LOAD) + continue; + + if (ops->device_to_virt) + dst = ops->device_to_virt(dev, (ulong)dst); + + dev_dbg(dev, "Loading phdr %i to 0x%p (%i bytes)\n", + i, dst, phdr->p_filesz); + if (phdr->p_filesz) + memcpy(dst, src, phdr->p_filesz); + if (phdr->p_filesz != phdr->p_memsz) + memset(dst + phdr->p_filesz, 0x00, + phdr->p_memsz - phdr->p_filesz); + flush_cache(rounddown((unsigned long)dst, ARCH_DMA_MINALIGN), + roundup((unsigned long)dst + phdr->p_filesz, + ARCH_DMA_MINALIGN) - + rounddown((unsigned long)dst, ARCH_DMA_MINALIGN)); + ++phdr; + } + + return 0; +} diff --git a/drivers/remoteproc/sandbox_testproc.c b/drivers/remoteproc/sandbox_testproc.c index 51a67e6bf1..5f35119ab7 100644 --- a/drivers/remoteproc/sandbox_testproc.c +++ b/drivers/remoteproc/sandbox_testproc.c @@ -8,6 +8,7 @@ #include <dm.h> #include <errno.h> #include <remoteproc.h> +#include <asm/io.h> /** * enum sandbox_state - different device states @@ -300,6 +301,23 @@ static int sandbox_testproc_ping(struct udevice *dev) return ret; } +#define SANDBOX_RPROC_DEV_TO_PHY_OFFSET 0x1000 +/** + * sandbox_testproc_device_to_virt() - Convert device address to virtual address + * @dev: device to operate upon + * @da: device address + * @return converted virtual address + */ +static void *sandbox_testproc_device_to_virt(struct udevice *dev, ulong da) +{ + u64 paddr; + + /* Use a simple offset conversion */ + paddr = da + SANDBOX_RPROC_DEV_TO_PHY_OFFSET; + + return phys_to_virt(paddr); +} + static const struct dm_rproc_ops sandbox_testproc_ops = { .init = sandbox_testproc_init, .reset = sandbox_testproc_reset, @@ -308,6 +326,7 @@ static const struct dm_rproc_ops sandbox_testproc_ops = { .stop = sandbox_testproc_stop, .is_running = sandbox_testproc_is_running, .ping = sandbox_testproc_ping, + .device_to_virt = sandbox_testproc_device_to_virt, }; static const struct udevice_id sandbox_ids[] = { diff --git a/drivers/remoteproc/stm32_copro.c b/drivers/remoteproc/stm32_copro.c new file mode 100644 index 0000000000..de3b9729f3 --- /dev/null +++ b/drivers/remoteproc/stm32_copro.c @@ -0,0 +1,257 @@ +// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause +/* + * Copyright (C) 2019, STMicroelectronics - All Rights Reserved + */ +#define pr_fmt(fmt) "%s: " fmt, __func__ +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <fdtdec.h> +#include <regmap.h> +#include <remoteproc.h> +#include <reset.h> +#include <syscon.h> +#include <asm/io.h> + +#define RCC_GCR_HOLD_BOOT 0 +#define RCC_GCR_RELEASE_BOOT 1 + +/** + * struct stm32_copro_privdata - power processor private data + * @reset_ctl: reset controller handle + * @hold_boot_regmap: regmap for remote processor reset hold boot + * @hold_boot_offset: offset of the register controlling the hold boot setting + * @hold_boot_mask: bitmask of the register for the hold boot field + * @is_running: is the remote processor running + */ +struct stm32_copro_privdata { + struct reset_ctl reset_ctl; + struct regmap *hold_boot_regmap; + uint hold_boot_offset; + uint hold_boot_mask; + bool is_running; +}; + +/** + * stm32_copro_probe() - Basic probe + * @dev: corresponding STM32 remote processor device + * @return 0 if all went ok, else corresponding -ve error + */ +static int stm32_copro_probe(struct udevice *dev) +{ + struct stm32_copro_privdata *priv; + struct regmap *regmap; + const fdt32_t *cell; + int len, ret; + + priv = dev_get_priv(dev); + + regmap = syscon_regmap_lookup_by_phandle(dev, "st,syscfg-holdboot"); + if (IS_ERR(regmap)) { + dev_err(dev, "unable to find holdboot regmap (%ld)\n", + PTR_ERR(regmap)); + return PTR_ERR(regmap); + } + + cell = dev_read_prop(dev, "st,syscfg-holdboot", &len); + if (len < 3 * sizeof(fdt32_t)) { + dev_err(dev, "holdboot offset and mask not available\n"); + return -EINVAL; + } + + priv->hold_boot_regmap = regmap; + priv->hold_boot_offset = fdtdec_get_number(cell + 1, 1); + priv->hold_boot_mask = fdtdec_get_number(cell + 2, 1); + + ret = reset_get_by_index(dev, 0, &priv->reset_ctl); + if (ret) { + dev_err(dev, "failed to get reset (%d)\n", ret); + return ret; + } + + dev_dbg(dev, "probed\n"); + + return 0; +} + +/** + * stm32_copro_set_hold_boot() - Hold boot bit management + * @dev: corresponding STM32 remote processor device + * @hold: hold boot value + * @return 0 if all went ok, else corresponding -ve error + */ +static int stm32_copro_set_hold_boot(struct udevice *dev, bool hold) +{ + struct stm32_copro_privdata *priv; + uint val; + int ret; + + priv = dev_get_priv(dev); + + val = hold ? RCC_GCR_HOLD_BOOT : RCC_GCR_RELEASE_BOOT; + + /* + * Note: shall run an SMC call (STM32_SMC_RCC) if platform is secured. + * To be updated when the code for this SMC service is available which + * is not the case for the time being. + */ + ret = regmap_update_bits(priv->hold_boot_regmap, priv->hold_boot_offset, + priv->hold_boot_mask, val); + if (ret) + dev_err(dev, "failed to set hold boot\n"); + + return ret; +} + +/** + * stm32_copro_device_to_virt() - Convert device address to virtual address + * @dev: corresponding STM32 remote processor device + * @da: device address + * @return converted virtual address + */ +static void *stm32_copro_device_to_virt(struct udevice *dev, ulong da) +{ + fdt32_t in_addr = cpu_to_be32(da); + u64 paddr; + + paddr = dev_translate_dma_address(dev, &in_addr); + if (paddr == OF_BAD_ADDR) { + dev_err(dev, "Unable to convert address %ld\n", da); + return NULL; + } + + return phys_to_virt(paddr); +} + +/** + * stm32_copro_load() - Loadup the STM32 remote processor + * @dev: corresponding STM32 remote processor device + * @addr: Address in memory where image is stored + * @size: Size in bytes of the image + * @return 0 if all went ok, else corresponding -ve error + */ +static int stm32_copro_load(struct udevice *dev, ulong addr, ulong size) +{ + struct stm32_copro_privdata *priv; + int ret; + + priv = dev_get_priv(dev); + + ret = stm32_copro_set_hold_boot(dev, true); + if (ret) + return ret; + + ret = reset_assert(&priv->reset_ctl); + if (ret) { + dev_err(dev, "Unable to assert reset line (ret=%d)\n", ret); + return ret; + } + + /* Support only ELF32 image */ + ret = rproc_elf32_sanity_check(addr, size); + if (ret) { + dev_err(dev, "Invalid ELF32 image (%d)\n", ret); + return ret; + } + + return rproc_elf32_load_image(dev, addr); +} + +/** + * stm32_copro_start() - Start the STM32 remote processor + * @dev: corresponding STM32 remote processor device + * @return 0 if all went ok, else corresponding -ve error + */ +static int stm32_copro_start(struct udevice *dev) +{ + struct stm32_copro_privdata *priv; + int ret; + + priv = dev_get_priv(dev); + + /* move hold boot from true to false start the copro */ + ret = stm32_copro_set_hold_boot(dev, false); + if (ret) + return ret; + + /* + * Once copro running, reset hold boot flag to avoid copro + * rebooting autonomously + */ + ret = stm32_copro_set_hold_boot(dev, true); + priv->is_running = !ret; + return ret; +} + +/** + * stm32_copro_reset() - Reset the STM32 remote processor + * @dev: corresponding STM32 remote processor device + * @return 0 if all went ok, else corresponding -ve error + */ +static int stm32_copro_reset(struct udevice *dev) +{ + struct stm32_copro_privdata *priv; + int ret; + + priv = dev_get_priv(dev); + + ret = stm32_copro_set_hold_boot(dev, true); + if (ret) + return ret; + + ret = reset_assert(&priv->reset_ctl); + if (ret) { + dev_err(dev, "Unable to assert reset line (ret=%d)\n", ret); + return ret; + } + + priv->is_running = false; + + return 0; +} + +/** + * stm32_copro_stop() - Stop the STM32 remote processor + * @dev: corresponding STM32 remote processor device + * @return 0 if all went ok, else corresponding -ve error + */ +static int stm32_copro_stop(struct udevice *dev) +{ + return stm32_copro_reset(dev); +} + +/** + * stm32_copro_is_running() - Is the STM32 remote processor running + * @dev: corresponding STM32 remote processor device + * @return 1 if the remote processor is running, 0 otherwise + */ +static int stm32_copro_is_running(struct udevice *dev) +{ + struct stm32_copro_privdata *priv; + + priv = dev_get_priv(dev); + return priv->is_running; +} + +static const struct dm_rproc_ops stm32_copro_ops = { + .load = stm32_copro_load, + .start = stm32_copro_start, + .stop = stm32_copro_stop, + .reset = stm32_copro_reset, + .is_running = stm32_copro_is_running, + .device_to_virt = stm32_copro_device_to_virt, +}; + +static const struct udevice_id stm32_copro_ids[] = { + {.compatible = "st,stm32mp1-rproc"}, + {} +}; + +U_BOOT_DRIVER(stm32_copro) = { + .name = "stm32_m4_proc", + .of_match = stm32_copro_ids, + .id = UCLASS_REMOTEPROC, + .ops = &stm32_copro_ops, + .probe = stm32_copro_probe, + .priv_auto_alloc_size = sizeof(struct stm32_copro_privdata), +}; |