1 From b514bc3c0a5a57bc83843dc66c72788b9c9435ac Mon Sep 17 00:00:00 2001
2 From: Robert Marko <robimarko@gmail.com>
3 Date: Thu, 18 May 2023 16:02:23 +0200
4 Subject: [PATCH 1/3] firmware: qcom: scm: Add SDI disable support
6 Some SoC-s like IPQ5018 require SDI(Secure Debug Image) to be disabled
7 before trying to reboot, otherwise board will just hang after reboot has
10 So, provide a call to SCM that allows disabling it.
12 Signed-off-by: Robert Marko <robimarko@gmail.com>
13 Acked-by: Mukesh Ojha <quic_mojha@quicinc.com>
15 drivers/firmware/qcom_scm.c | 23 +++++++++++++++++++++++
16 drivers/firmware/qcom_scm.h | 1 +
17 2 files changed, 24 insertions(+)
19 --- a/drivers/firmware/qcom_scm.c
20 +++ b/drivers/firmware/qcom_scm.c
21 @@ -389,6 +389,29 @@ int qcom_scm_set_remote_state(u32 state,
23 EXPORT_SYMBOL(qcom_scm_set_remote_state);
25 +static int qcom_scm_disable_sdi(void)
28 + struct qcom_scm_desc desc = {
29 + .svc = QCOM_SCM_SVC_BOOT,
30 + .cmd = QCOM_SCM_BOOT_SDI_CONFIG,
31 + .args[0] = 1, /* Disable watchdog debug */
32 + .args[1] = 0, /* Disable SDI */
33 + .arginfo = QCOM_SCM_ARGS(2),
34 + .owner = ARM_SMCCC_OWNER_SIP,
36 + struct qcom_scm_res res;
38 + ret = qcom_scm_clk_enable();
41 + ret = qcom_scm_call(__scm->dev, &desc, &res);
43 + qcom_scm_clk_disable();
45 + return ret ? : res.result[0];
48 static int __qcom_scm_set_dload_mode(struct device *dev, bool enable)
50 struct qcom_scm_desc desc = {
51 --- a/drivers/firmware/qcom_scm.h
52 +++ b/drivers/firmware/qcom_scm.h
53 @@ -77,6 +77,7 @@ extern int scm_legacy_call(struct device
54 #define QCOM_SCM_SVC_BOOT 0x01
55 #define QCOM_SCM_BOOT_SET_ADDR 0x01
56 #define QCOM_SCM_BOOT_TERMINATE_PC 0x02
57 +#define QCOM_SCM_BOOT_SDI_CONFIG 0x09
58 #define QCOM_SCM_BOOT_SET_DLOAD_MODE 0x10
59 #define QCOM_SCM_BOOT_SET_REMOTE_STATE 0x0a
60 #define QCOM_SCM_FLUSH_FLAG_MASK 0x3