diff options
Diffstat (limited to 'drivers/firmware/qcom_scm.c')
| -rw-r--r-- | drivers/firmware/qcom_scm.c | 640 |
1 files changed, 0 insertions, 640 deletions
diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c deleted file mode 100644 index af4eee86919d..000000000000 --- a/drivers/firmware/qcom_scm.c +++ /dev/null @@ -1,640 +0,0 @@ -/* - * Qualcomm SCM driver - * - * Copyright (c) 2010,2015, The Linux Foundation. All rights reserved. - * Copyright (C) 2015 Linaro Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ -#include <linux/platform_device.h> -#include <linux/init.h> -#include <linux/cpumask.h> -#include <linux/export.h> -#include <linux/dma-mapping.h> -#include <linux/module.h> -#include <linux/types.h> -#include <linux/qcom_scm.h> -#include <linux/of.h> -#include <linux/of_address.h> -#include <linux/of_platform.h> -#include <linux/clk.h> -#include <linux/reset-controller.h> - -#include "qcom_scm.h" - -static bool download_mode = IS_ENABLED(CONFIG_QCOM_SCM_DOWNLOAD_MODE_DEFAULT); -module_param(download_mode, bool, 0); - -#define SCM_HAS_CORE_CLK BIT(0) -#define SCM_HAS_IFACE_CLK BIT(1) -#define SCM_HAS_BUS_CLK BIT(2) - -struct qcom_scm { - struct device *dev; - struct clk *core_clk; - struct clk *iface_clk; - struct clk *bus_clk; - struct reset_controller_dev reset; - - u64 dload_mode_addr; -}; - -struct qcom_scm_current_perm_info { - __le32 vmid; - __le32 perm; - __le64 ctx; - __le32 ctx_size; - __le32 unused; -}; - -struct qcom_scm_mem_map_info { - __le64 mem_addr; - __le64 mem_size; -}; - -static struct qcom_scm *__scm; - -static int qcom_scm_clk_enable(void) -{ - int ret; - - ret = clk_prepare_enable(__scm->core_clk); - if (ret) - goto bail; - - ret = clk_prepare_enable(__scm->iface_clk); - if (ret) - goto disable_core; - - ret = clk_prepare_enable(__scm->bus_clk); - if (ret) - goto disable_iface; - - return 0; - -disable_iface: - clk_disable_unprepare(__scm->iface_clk); -disable_core: - clk_disable_unprepare(__scm->core_clk); -bail: - return ret; -} - -static void qcom_scm_clk_disable(void) -{ - clk_disable_unprepare(__scm->core_clk); - clk_disable_unprepare(__scm->iface_clk); - clk_disable_unprepare(__scm->bus_clk); -} - -/** - * qcom_scm_set_cold_boot_addr() - Set the cold boot address for cpus - * @entry: Entry point function for the cpus - * @cpus: The cpumask of cpus that will use the entry point - * - * Set the cold boot address of the cpus. Any cpu outside the supported - * range would be removed from the cpu present mask. - */ -int qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus) -{ - return __qcom_scm_set_cold_boot_addr(entry, cpus); -} -EXPORT_SYMBOL(qcom_scm_set_cold_boot_addr); - -/** - * qcom_scm_set_warm_boot_addr() - Set the warm boot address for cpus - * @entry: Entry point function for the cpus - * @cpus: The cpumask of cpus that will use the entry point - * - * Set the Linux entry point for the SCM to transfer control to when coming - * out of a power down. CPU power down may be executed on cpuidle or hotplug. - */ -int qcom_scm_set_warm_boot_addr(void *entry, const cpumask_t *cpus) -{ - return __qcom_scm_set_warm_boot_addr(__scm->dev, entry, cpus); -} -EXPORT_SYMBOL(qcom_scm_set_warm_boot_addr); - -/** - * qcom_scm_cpu_power_down() - Power down the cpu - * @flags - Flags to flush cache - * - * This is an end point to power down cpu. If there was a pending interrupt, - * the control would return from this function, otherwise, the cpu jumps to the - * warm boot entry point set for this cpu upon reset. - */ -void qcom_scm_cpu_power_down(u32 flags) -{ - __qcom_scm_cpu_power_down(flags); -} -EXPORT_SYMBOL(qcom_scm_cpu_power_down); - -/** - * qcom_scm_hdcp_available() - Check if secure environment supports HDCP. - * - * Return true if HDCP is supported, false if not. - */ -bool qcom_scm_hdcp_available(void) -{ - int ret = qcom_scm_clk_enable(); - - if (ret) - return ret; - - ret = __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_HDCP, - QCOM_SCM_CMD_HDCP); - - qcom_scm_clk_disable(); - - return ret > 0 ? true : false; -} -EXPORT_SYMBOL(qcom_scm_hdcp_available); - -/** - * qcom_scm_hdcp_req() - Send HDCP request. - * @req: HDCP request array - * @req_cnt: HDCP request array count - * @resp: response buffer passed to SCM - * - * Write HDCP register(s) through SCM. - */ -int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt, u32 *resp) -{ - int ret = qcom_scm_clk_enable(); - - if (ret) - return ret; - - ret = __qcom_scm_hdcp_req(__scm->dev, req, req_cnt, resp); - qcom_scm_clk_disable(); - return ret; -} -EXPORT_SYMBOL(qcom_scm_hdcp_req); - -/** - * qcom_scm_pas_supported() - Check if the peripheral authentication service is - * available for the given peripherial - * @peripheral: peripheral id - * - * Returns true if PAS is supported for this peripheral, otherwise false. - */ -bool qcom_scm_pas_supported(u32 peripheral) -{ - int ret; - - ret = __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_PIL, - QCOM_SCM_PAS_IS_SUPPORTED_CMD); - if (ret <= 0) - return false; - - return __qcom_scm_pas_supported(__scm->dev, peripheral); -} -EXPORT_SYMBOL(qcom_scm_pas_supported); - -/** - * qcom_scm_pas_init_image() - Initialize peripheral authentication service - * state machine for a given peripheral, using the - * metadata - * @peripheral: peripheral id - * @metadata: pointer to memory containing ELF header, program header table - * and optional blob of data used for authenticating the metadata - * and the rest of the firmware - * @size: size of the metadata - * - * Returns 0 on success. - */ -int qcom_scm_pas_init_image(u32 peripheral, const void *metadata, size_t size) -{ - dma_addr_t mdata_phys; - void *mdata_buf; - int ret; - - /* - * During the scm call memory protection will be enabled for the meta - * data blob, so make sure it's physically contiguous, 4K aligned and - * non-cachable to avoid XPU violations. - */ - mdata_buf = dma_alloc_coherent(__scm->dev, size, &mdata_phys, - GFP_KERNEL); - if (!mdata_buf) { - dev_err(__scm->dev, "Allocation of metadata buffer failed.\n"); - return -ENOMEM; - } - memcpy(mdata_buf, metadata, size); - - ret = qcom_scm_clk_enable(); - if (ret) - goto free_metadata; - - ret = __qcom_scm_pas_init_image(__scm->dev, peripheral, mdata_phys); - - qcom_scm_clk_disable(); - -free_metadata: - dma_free_coherent(__scm->dev, size, mdata_buf, mdata_phys); - - return ret; -} -EXPORT_SYMBOL(qcom_scm_pas_init_image); - -/** - * qcom_scm_pas_mem_setup() - Prepare the memory related to a given peripheral - * for firmware loading - * @peripheral: peripheral id - * @addr: start address of memory area to prepare - * @size: size of the memory area to prepare - * - * Returns 0 on success. - */ -int qcom_scm_pas_mem_setup(u32 peripheral, phys_addr_t addr, phys_addr_t size) -{ - int ret; - - ret = qcom_scm_clk_enable(); - if (ret) - return ret; - - ret = __qcom_scm_pas_mem_setup(__scm->dev, peripheral, addr, size); - qcom_scm_clk_disable(); - - return ret; -} -EXPORT_SYMBOL(qcom_scm_pas_mem_setup); - -/** - * qcom_scm_pas_auth_and_reset() - Authenticate the given peripheral firmware - * and reset the remote processor - * @peripheral: peripheral id - * - * Return 0 on success. - */ -int qcom_scm_pas_auth_and_reset(u32 peripheral) -{ - int ret; - - ret = qcom_scm_clk_enable(); - if (ret) - return ret; - - ret = __qcom_scm_pas_auth_and_reset(__scm->dev, peripheral); - qcom_scm_clk_disable(); - - return ret; -} -EXPORT_SYMBOL(qcom_scm_pas_auth_and_reset); - -/** - * qcom_scm_pas_shutdown() - Shut down the remote processor - * @peripheral: peripheral id - * - * Returns 0 on success. - */ -int qcom_scm_pas_shutdown(u32 peripheral) -{ - int ret; - - ret = qcom_scm_clk_enable(); - if (ret) - return ret; - - ret = __qcom_scm_pas_shutdown(__scm->dev, peripheral); - qcom_scm_clk_disable(); - - return ret; -} -EXPORT_SYMBOL(qcom_scm_pas_shutdown); - -static int qcom_scm_pas_reset_assert(struct reset_controller_dev *rcdev, - unsigned long idx) -{ - if (idx != 0) - return -EINVAL; - - return __qcom_scm_pas_mss_reset(__scm->dev, 1); -} - -static int qcom_scm_pas_reset_deassert(struct reset_controller_dev *rcdev, - unsigned long idx) -{ - if (idx != 0) - return -EINVAL; - - return __qcom_scm_pas_mss_reset(__scm->dev, 0); -} - -static const struct reset_control_ops qcom_scm_pas_reset_ops = { - .assert = qcom_scm_pas_reset_assert, - .deassert = qcom_scm_pas_reset_deassert, -}; - -int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare) -{ - return __qcom_scm_restore_sec_cfg(__scm->dev, device_id, spare); -} -EXPORT_SYMBOL(qcom_scm_restore_sec_cfg); - -int qcom_scm_iommu_secure_ptbl_size(u32 spare, size_t *size) -{ - return __qcom_scm_iommu_secure_ptbl_size(__scm->dev, spare, size); -} -EXPORT_SYMBOL(qcom_scm_iommu_secure_ptbl_size); - -int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare) -{ - return __qcom_scm_iommu_secure_ptbl_init(__scm->dev, addr, size, spare); -} -EXPORT_SYMBOL(qcom_scm_iommu_secure_ptbl_init); - -int qcom_scm_io_readl(phys_addr_t addr, unsigned int *val) -{ - return __qcom_scm_io_readl(__scm->dev, addr, val); -} -EXPORT_SYMBOL(qcom_scm_io_readl); - -int qcom_scm_io_writel(phys_addr_t addr, unsigned int val) -{ - return __qcom_scm_io_writel(__scm->dev, addr, val); -} -EXPORT_SYMBOL(qcom_scm_io_writel); - -static void qcom_scm_set_download_mode(bool enable) -{ - bool avail; - int ret = 0; - - avail = __qcom_scm_is_call_available(__scm->dev, - QCOM_SCM_SVC_BOOT, - QCOM_SCM_SET_DLOAD_MODE); - if (avail) { - ret = __qcom_scm_set_dload_mode(__scm->dev, enable); - } else if (__scm->dload_mode_addr) { - ret = __qcom_scm_io_writel(__scm->dev, __scm->dload_mode_addr, - enable ? QCOM_SCM_SET_DLOAD_MODE : 0); - } else { - dev_err(__scm->dev, - "No available mechanism for setting download mode\n"); - } - - if (ret) - dev_err(__scm->dev, "failed to set download mode: %d\n", ret); -} - -static int qcom_scm_find_dload_address(struct device *dev, u64 *addr) -{ - struct device_node *tcsr; - struct device_node *np = dev->of_node; - struct resource res; - u32 offset; - int ret; - - tcsr = of_parse_phandle(np, "qcom,dload-mode", 0); - if (!tcsr) - return 0; - - ret = of_address_to_resource(tcsr, 0, &res); - of_node_put(tcsr); - if (ret) - return ret; - - ret = of_property_read_u32_index(np, "qcom,dload-mode", 1, &offset); - if (ret < 0) - return ret; - - *addr = res.start + offset; - - return 0; -} - -/** - * qcom_scm_is_available() - Checks if SCM is available - */ -bool qcom_scm_is_available(void) -{ - return !!__scm; -} -EXPORT_SYMBOL(qcom_scm_is_available); - -int qcom_scm_set_remote_state(u32 state, u32 id) -{ - return __qcom_scm_set_remote_state(__scm->dev, state, id); -} -EXPORT_SYMBOL(qcom_scm_set_remote_state); - -/** - * qcom_scm_assign_mem() - Make a secure call to reassign memory ownership - * @mem_addr: mem region whose ownership need to be reassigned - * @mem_sz: size of the region. - * @srcvm: vmid for current set of owners, each set bit in - * flag indicate a unique owner - * @newvm: array having new owners and corrsponding permission - * flags - * @dest_cnt: number of owners in next set. - * - * Return negative errno on failure, 0 on success, with @srcvm updated. - */ -int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz, - unsigned int *srcvm, - struct qcom_scm_vmperm *newvm, int dest_cnt) -{ - struct qcom_scm_current_perm_info *destvm; - struct qcom_scm_mem_map_info *mem_to_map; - phys_addr_t mem_to_map_phys; - phys_addr_t dest_phys; - phys_addr_t ptr_phys; - size_t mem_to_map_sz; - size_t dest_sz; - size_t src_sz; - size_t ptr_sz; - int next_vm; - __le32 *src; - void *ptr; - int ret; - int len; - int i; - - src_sz = hweight_long(*srcvm) * sizeof(*src); - mem_to_map_sz = sizeof(*mem_to_map); - dest_sz = dest_cnt * sizeof(*destvm); - ptr_sz = ALIGN(src_sz, SZ_64) + ALIGN(mem_to_map_sz, SZ_64) + - ALIGN(dest_sz, SZ_64); - - ptr = dma_alloc_coherent(__scm->dev, ptr_sz, &ptr_phys, GFP_KERNEL); - if (!ptr) - return -ENOMEM; - - /* Fill source vmid detail */ - src = ptr; - len = hweight_long(*srcvm); - for (i = 0; i < len; i++) { - src[i] = cpu_to_le32(ffs(*srcvm) - 1); - *srcvm ^= 1 << (ffs(*srcvm) - 1); - } - - /* Fill details of mem buff to map */ - mem_to_map = ptr + ALIGN(src_sz, SZ_64); - mem_to_map_phys = ptr_phys + ALIGN(src_sz, SZ_64); - mem_to_map[0].mem_addr = cpu_to_le64(mem_addr); - mem_to_map[0].mem_size = cpu_to_le64(mem_sz); - - next_vm = 0; - /* Fill details of next vmid detail */ - destvm = ptr + ALIGN(mem_to_map_sz, SZ_64) + ALIGN(src_sz, SZ_64); - dest_phys = ptr_phys + ALIGN(mem_to_map_sz, SZ_64) + ALIGN(src_sz, SZ_64); - for (i = 0; i < dest_cnt; i++) { - destvm[i].vmid = cpu_to_le32(newvm[i].vmid); - destvm[i].perm = cpu_to_le32(newvm[i].perm); - destvm[i].ctx = 0; - destvm[i].ctx_size = 0; - next_vm |= BIT(newvm[i].vmid); - } - - ret = __qcom_scm_assign_mem(__scm->dev, mem_to_map_phys, mem_to_map_sz, - ptr_phys, src_sz, dest_phys, dest_sz); - dma_free_coherent(__scm->dev, ALIGN(ptr_sz, SZ_64), ptr, ptr_phys); - if (ret) { - dev_err(__scm->dev, - "Assign memory protection call failed %d.\n", ret); - return -EINVAL; - } - - *srcvm = next_vm; - return 0; -} -EXPORT_SYMBOL(qcom_scm_assign_mem); - -static int qcom_scm_probe(struct platform_device *pdev) -{ - struct qcom_scm *scm; - unsigned long clks; - int ret; - - scm = devm_kzalloc(&pdev->dev, sizeof(*scm), GFP_KERNEL); - if (!scm) - return -ENOMEM; - - ret = qcom_scm_find_dload_address(&pdev->dev, &scm->dload_mode_addr); - if (ret < 0) - return ret; - - clks = (unsigned long)of_device_get_match_data(&pdev->dev); - - scm->core_clk = devm_clk_get(&pdev->dev, "core"); - if (IS_ERR(scm->core_clk)) { - if (PTR_ERR(scm->core_clk) == -EPROBE_DEFER) - return PTR_ERR(scm->core_clk); - - if (clks & SCM_HAS_CORE_CLK) { - dev_err(&pdev->dev, "failed to acquire core clk\n"); - return PTR_ERR(scm->core_clk); - } - - scm->core_clk = NULL; - } - - scm->iface_clk = devm_clk_get(&pdev->dev, "iface"); - if (IS_ERR(scm->iface_clk)) { - if (PTR_ERR(scm->iface_clk) == -EPROBE_DEFER) - return PTR_ERR(scm->iface_clk); - - if (clks & SCM_HAS_IFACE_CLK) { - dev_err(&pdev->dev, "failed to acquire iface clk\n"); - return PTR_ERR(scm->iface_clk); - } - - scm->iface_clk = NULL; - } - - scm->bus_clk = devm_clk_get(&pdev->dev, "bus"); - if (IS_ERR(scm->bus_clk)) { - if (PTR_ERR(scm->bus_clk) == -EPROBE_DEFER) - return PTR_ERR(scm->bus_clk); - - if (clks & SCM_HAS_BUS_CLK) { - dev_err(&pdev->dev, "failed to acquire bus clk\n"); - return PTR_ERR(scm->bus_clk); - } - - scm->bus_clk = NULL; - } - - scm->reset.ops = &qcom_scm_pas_reset_ops; - scm->reset.nr_resets = 1; - scm->reset.of_node = pdev->dev.of_node; - ret = devm_reset_controller_register(&pdev->dev, &scm->reset); - if (ret) - return ret; - - /* vote for max clk rate for highest performance */ - ret = clk_set_rate(scm->core_clk, INT_MAX); - if (ret) - return ret; - - __scm = scm; - __scm->dev = &pdev->dev; - - __qcom_scm_init(); - - /* - * If requested enable "download mode", from this point on warmboot - * will cause the the boot stages to enter download mode, unless - * disabled below by a clean shutdown/reboot. - */ - if (download_mode) - qcom_scm_set_download_mode(true); - - return 0; -} - -static void qcom_scm_shutdown(struct platform_device *pdev) -{ - /* Clean shutdown, disable download mode to allow normal restart */ - if (download_mode) - qcom_scm_set_download_mode(false); -} - -static const struct of_device_id qcom_scm_dt_match[] = { - { .compatible = "qcom,scm-apq8064", - /* FIXME: This should have .data = (void *) SCM_HAS_CORE_CLK */ - }, - { .compatible = "qcom,scm-apq8084", .data = (void *)(SCM_HAS_CORE_CLK | - SCM_HAS_IFACE_CLK | - SCM_HAS_BUS_CLK) - }, - { .compatible = "qcom,scm-ipq4019" }, - { .compatible = "qcom,scm-msm8660", .data = (void *) SCM_HAS_CORE_CLK }, - { .compatible = "qcom,scm-msm8960", .data = (void *) SCM_HAS_CORE_CLK }, - { .compatible = "qcom,scm-msm8916", .data = (void *)(SCM_HAS_CORE_CLK | - SCM_HAS_IFACE_CLK | - SCM_HAS_BUS_CLK) - }, - { .compatible = "qcom,scm-msm8974", .data = (void *)(SCM_HAS_CORE_CLK | - SCM_HAS_IFACE_CLK | - SCM_HAS_BUS_CLK) - }, - { .compatible = "qcom,scm-msm8996" }, - { .compatible = "qcom,scm" }, - {} -}; - -static struct platform_driver qcom_scm_driver = { - .driver = { - .name = "qcom_scm", - .of_match_table = qcom_scm_dt_match, - }, - .probe = qcom_scm_probe, - .shutdown = qcom_scm_shutdown, -}; - -static int __init qcom_scm_init(void) -{ - return platform_driver_register(&qcom_scm_driver); -} -subsys_initcall(qcom_scm_init); |