msm: mdm: Add support for remote MDM image upgrade
mdm-driver is informed that an image upgrade of the remote modem is
required, at which point it stops monitoring the error gpios and takes
the appropriate actions. Support for the "USB Switch" gpio is added.
This is needed to write a image to an empty modem flash.
Change-Id: I4c05a80955124a3eb7edc11e99f4945f9de79e6b
Signed-off-by: Ameya Thakur <ameyat@codeaurora.org>
diff --git a/arch/arm/mach-msm/mdm2.c b/arch/arm/mach-msm/mdm2.c
index 6e7086e..e74af2e 100644
--- a/arch/arm/mach-msm/mdm2.c
+++ b/arch/arm/mach-msm/mdm2.c
@@ -249,6 +249,33 @@
}
}
+static void mdm_image_upgrade(struct mdm_modem_drv *mdm_drv, int type)
+{
+ switch (type) {
+ case APQ_CONTROLLED_UPGRADE:
+ pr_debug("%s APQ controlled modem image upgrade\n", __func__);
+ mdm_drv->mdm_ready = 0;
+ mdm_toggle_soft_reset(mdm_drv);
+ break;
+ case MDM_CONTROLLED_UPGRADE:
+ pr_debug("%s MDM controlled modem image upgrade\n", __func__);
+ mdm_drv->mdm_ready = 0;
+ /*
+ * If we have no image currently present on the modem, then we
+ * would be in PBL, in which case the status gpio would not go
+ * high.
+ */
+ mdm_drv->disable_status_check = 1;
+ if (mdm_drv->usb_switch_gpio > 0) {
+ pr_info("%s Switching usb control to MDM\n", __func__);
+ gpio_direction_output(mdm_drv->usb_switch_gpio, 1);
+ } else
+ pr_err("%s usb switch gpio unavailable\n", __func__);
+ break;
+ default:
+ pr_err("%s invalid upgrade type\n", __func__);
+ }
+}
static struct mdm_ops mdm_cb = {
.power_on_mdm_cb = mdm_power_on_common,
.reset_mdm_cb = mdm_power_on_common,
@@ -256,6 +283,7 @@
.power_down_mdm_cb = mdm_power_down_common,
.debug_state_changed_cb = debug_state_changed,
.status_cb = mdm_status_changed,
+ .image_upgrade_cb = mdm_image_upgrade,
};
static int __init mdm_modem_probe(struct platform_device *pdev)