123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418 |
- #include <linux/platform_device.h>
- #include <linux/init.h>
- #include <linux/cpumask.h>
- #include <linux/export.h>
- #include <linux/dma-mapping.h>
- #include <linux/types.h>
- #include <linux/qcom_scm.h>
- #include <linux/of.h>
- #include <linux/of_platform.h>
- #include <linux/clk.h>
- #include <linux/reset-controller.h>
- #include "qcom_scm.h"
- struct qcom_scm {
- struct device *dev;
- struct clk *core_clk;
- struct clk *iface_clk;
- struct clk *bus_clk;
- struct reset_controller_dev reset;
- };
- 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);
- }
- 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);
- 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);
- void qcom_scm_cpu_power_down(u32 flags)
- {
- __qcom_scm_cpu_power_down(flags);
- }
- EXPORT_SYMBOL(qcom_scm_cpu_power_down);
- 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);
- 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);
- 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);
- int qcom_scm_pas_init_image(u32 peripheral, const void *metadata, size_t size)
- {
- dma_addr_t mdata_phys;
- void *mdata_buf;
- int ret;
-
- 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);
- 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);
- 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);
- 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,
- };
- bool qcom_scm_is_available(void)
- {
- return !!__scm;
- }
- EXPORT_SYMBOL(qcom_scm_is_available);
- static int qcom_scm_probe(struct platform_device *pdev)
- {
- struct qcom_scm *scm;
- int ret;
- scm = devm_kzalloc(&pdev->dev, sizeof(*scm), GFP_KERNEL);
- if (!scm)
- return -ENOMEM;
- 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);
- scm->core_clk = NULL;
- }
- if (of_device_is_compatible(pdev->dev.of_node, "qcom,scm")) {
- scm->iface_clk = devm_clk_get(&pdev->dev, "iface");
- if (IS_ERR(scm->iface_clk)) {
- if (PTR_ERR(scm->iface_clk) != -EPROBE_DEFER)
- dev_err(&pdev->dev, "failed to acquire iface clk\n");
- return PTR_ERR(scm->iface_clk);
- }
- scm->bus_clk = devm_clk_get(&pdev->dev, "bus");
- if (IS_ERR(scm->bus_clk)) {
- if (PTR_ERR(scm->bus_clk) != -EPROBE_DEFER)
- dev_err(&pdev->dev, "failed to acquire bus clk\n");
- return PTR_ERR(scm->bus_clk);
- }
- }
- scm->reset.ops = &qcom_scm_pas_reset_ops;
- scm->reset.nr_resets = 1;
- scm->reset.of_node = pdev->dev.of_node;
- reset_controller_register(&scm->reset);
-
- ret = clk_set_rate(scm->core_clk, INT_MAX);
- if (ret)
- return ret;
- __scm = scm;
- __scm->dev = &pdev->dev;
- __qcom_scm_init();
- return 0;
- }
- static const struct of_device_id qcom_scm_dt_match[] = {
- { .compatible = "qcom,scm-apq8064",},
- { .compatible = "qcom,scm-msm8660",},
- { .compatible = "qcom,scm-msm8960",},
- { .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,
- };
- static int __init qcom_scm_init(void)
- {
- struct device_node *np, *fw_np;
- int ret;
- fw_np = of_find_node_by_name(NULL, "firmware");
- if (!fw_np)
- return -ENODEV;
- np = of_find_matching_node(fw_np, qcom_scm_dt_match);
- if (!np) {
- of_node_put(fw_np);
- return -ENODEV;
- }
- of_node_put(np);
- ret = of_platform_populate(fw_np, qcom_scm_dt_match, NULL, NULL);
- of_node_put(fw_np);
- if (ret)
- return ret;
- return platform_driver_register(&qcom_scm_driver);
- }
- subsys_initcall(qcom_scm_init);
|