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- From b514bc3c0a5a57bc83843dc66c72788b9c9435ac Mon Sep 17 00:00:00 2001
- From: Robert Marko <[email protected]>
- Date: Thu, 18 May 2023 16:02:23 +0200
- Subject: [PATCH 1/3] firmware: qcom: scm: Add SDI disable support
- Some SoC-s like IPQ5018 require SDI(Secure Debug Image) to be disabled
- before trying to reboot, otherwise board will just hang after reboot has
- been issued via PSCI.
- So, provide a call to SCM that allows disabling it.
- Signed-off-by: Robert Marko <[email protected]>
- Acked-by: Mukesh Ojha <[email protected]>
- ---
- drivers/firmware/qcom_scm.c | 23 +++++++++++++++++++++++
- drivers/firmware/qcom_scm.h | 1 +
- 2 files changed, 24 insertions(+)
- --- a/drivers/firmware/qcom_scm.c
- +++ b/drivers/firmware/qcom_scm.c
- @@ -389,6 +389,29 @@ int qcom_scm_set_remote_state(u32 state,
- }
- EXPORT_SYMBOL(qcom_scm_set_remote_state);
-
- +static int qcom_scm_disable_sdi(void)
- +{
- + int ret;
- + struct qcom_scm_desc desc = {
- + .svc = QCOM_SCM_SVC_BOOT,
- + .cmd = QCOM_SCM_BOOT_SDI_CONFIG,
- + .args[0] = 1, /* Disable watchdog debug */
- + .args[1] = 0, /* Disable SDI */
- + .arginfo = QCOM_SCM_ARGS(2),
- + .owner = ARM_SMCCC_OWNER_SIP,
- + };
- + struct qcom_scm_res res;
- +
- + ret = qcom_scm_clk_enable();
- + if (ret)
- + return ret;
- + ret = qcom_scm_call(__scm->dev, &desc, &res);
- +
- + qcom_scm_clk_disable();
- +
- + return ret ? : res.result[0];
- +}
- +
- static int __qcom_scm_set_dload_mode(struct device *dev, bool enable)
- {
- struct qcom_scm_desc desc = {
- --- a/drivers/firmware/qcom_scm.h
- +++ b/drivers/firmware/qcom_scm.h
- @@ -77,6 +77,7 @@ extern int scm_legacy_call(struct device
- #define QCOM_SCM_SVC_BOOT 0x01
- #define QCOM_SCM_BOOT_SET_ADDR 0x01
- #define QCOM_SCM_BOOT_TERMINATE_PC 0x02
- +#define QCOM_SCM_BOOT_SDI_CONFIG 0x09
- #define QCOM_SCM_BOOT_SET_DLOAD_MODE 0x10
- #define QCOM_SCM_BOOT_SET_REMOTE_STATE 0x0a
- #define QCOM_SCM_FLUSH_FLAG_MASK 0x3
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