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Commit 1508778d authored by Yogesh Lal's avatar Yogesh Lal Committed by Rohit Agarwal
Browse files

power: reset: qcom-dload-mode: Add support for EDL over PCIe 



Currently EDL mode works over USB, if PCIe is early
enumerated on the device add support for EDL over PCIe.

Change-Id: I051ef2a5fa4f63890a1044838dd870fa0195b0b7
Signed-off-by: default avatarYogesh Lal <ylal@codeaurora.org>
parent cb6bfc80

drivers/power/reset/qcom-dload-mode.c

+33 −2
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ static bool enable_dump = 
	IS_ENABLED(CONFIG_POWER_RESET_QCOM_DOWNLOAD_MODE_DEFAULT);

static enum qcom_download_mode current_download_mode = QCOM_DOWNLOAD_NODUMP;

static enum qcom_download_mode dump_mode = QCOM_DOWNLOAD_FULLDUMP;

static bool early_pcie_init_enable;



static int set_download_mode(enum qcom_download_mode mode)

{
@@ -262,8 +263,10 @@ static int qcom_dload_reboot(struct notifier_block *this, unsigned long event, 
		set_download_mode(QCOM_DOWNLOAD_NODUMP);



	if (cmd) {

		if (!strcmp(cmd, "edl"))

			set_download_mode(QCOM_DOWNLOAD_EDL);

		if (!strcmp(cmd, "edl")) {

			early_pcie_init_enable ? set_download_mode(QCOM_EDLOAD_PCI_MODE)

				: set_download_mode(QCOM_DOWNLOAD_EDL);

		}

		else if (!strcmp(cmd, "qcom_dload"))

			msm_enable_dump_mode(true);

	}
@@ -311,6 +314,33 @@ static void store_kaslr_offset(void) 
static void store_kaslr_offset(void) {}

#endif /* CONFIG_RANDOMIZE_BASE */



static void check_pci_edl(struct device_node *np)

{

	void __iomem *mem;

	uint32_t read_val;

	int ret_l, ret_h, l, h, mask_value;



	mem = of_iomap(np, 0);

	if (!mem) {

		pr_info("Unable to map memory for DT property: %s\n", np->name);

		return;

	}



	read_val = __raw_readl(mem);

	ret_l = of_property_read_u32_index(np, "qcom,boot-config-shift", 0, &l);

	ret_h = of_property_read_u32_index(np, "qcom,boot-config-shift", 1, &h);



	if (!ret_l && !ret_h) {

		mask_value = (read_val >> l) & GENMASK(h - l, 0);

		if (mask_value == 5 || mask_value == 7) {

			early_pcie_init_enable = true;

			pr_info("Setting up EDL mode to PCIE\n");

		}

	}



	iounmap(mem);

}



static int qcom_dload_probe(struct platform_device *pdev)

{

	struct qcom_dload *poweroff;
@@ -340,6 +370,7 @@ static int qcom_dload_probe(struct platform_device *pdev) 


	poweroff->dload_dest_addr = map_prop_mem("qcom,msm-imem-dload-type");

	store_kaslr_offset();

	check_pci_edl(pdev->dev.of_node);



	msm_enable_dump_mode(enable_dump);

	if (!enable_dump)

include/linux/qcom_scm.h

+1 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
enum qcom_download_mode {

	QCOM_DOWNLOAD_NODUMP	= 0x00,

	QCOM_DOWNLOAD_EDL	= 0x01,

	QCOM_EDLOAD_PCI_MODE = 0X04,

	QCOM_DOWNLOAD_FULLDUMP	= 0x10,

	QCOM_DOWNLOAD_MINIDUMP	= 0x20,

};