8930: Use MPP line for USB ID detection
0n 8930 with PMIC 8917, USB ID line is not connected
to PMIC instead it is routed using MPP line. This
change adds support to configure MPP01 as input pin
and uses IRQ line for MPP01 for USB ID detection.
By default, this feature is disable as it is required
to have rework (i.e. external 30k pullup on MPP01 line)
with used hardware.
To enable this feature:
set usb_host_mode_pm8917=1 as boot param
CRs-Fixed: 438131
Change-Id: I7a3ef8cfc179b3504216673cf9e817b93e7a4b5d
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
diff --git a/arch/arm/mach-msm/board-8930.c b/arch/arm/mach-msm/board-8930.c
index aefa648..5169a31 100644
--- a/arch/arm/mach-msm/board-8930.c
+++ b/arch/arm/mach-msm/board-8930.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -1507,6 +1507,16 @@
#ifdef CONFIG_USB_MSM_OTG_72K
static struct msm_otg_platform_data msm_otg_pdata;
#else
+static int enable_usb_host_mode;
+static int __init usb_host_mode_with_pm8917(char *param)
+{
+ int ret;
+
+ ret = kstrtoint(param, 10, &enable_usb_host_mode);
+ return ret;
+}
+early_param("usb_host_mode_pm8917", usb_host_mode_with_pm8917);
+
#ifdef CONFIG_MSM_BUS_SCALING
/* Bandwidth requests (zero) if no vote placed */
static struct msm_bus_vectors usb_init_vectors[] = {
@@ -1560,7 +1570,6 @@
.mode = USB_OTG,
.otg_control = OTG_PMIC_CONTROL,
.phy_type = SNPS_28NM_INTEGRATED_PHY,
- .pmic_id_irq = PM8038_USB_ID_IN_IRQ(PM8038_IRQ_BASE),
.power_budget = 750,
#ifdef CONFIG_MSM_BUS_SCALING
.bus_scale_table = &usb_bus_scale_pdata,
@@ -2872,6 +2881,27 @@
msm_clock_init(&msm8930_pm8917_clock_init_data);
else
msm_clock_init(&msm8930_clock_init_data);
+
+ if (socinfo_get_pmic_model() == PMIC_MODEL_PM8917) {
+ /*
+ * By default, set USB mode as USB Peripheral only due to
+ * hardware rework requirement for USB Host Mode.
+ * Provide pmic_id_irq number only if host mode is enable
+ * by user assuming that hardware rework is available.
+ */
+ if (enable_usb_host_mode) {
+ /* MPP01 IRQ number */
+ msm_otg_pdata.pmic_id_irq =
+ PM8921_MPP_IRQ(PM8917_IRQ_BASE, 1);
+ } else {
+ pr_err("Enabling USB Peripheral Only mode.\n");
+ msm_otg_pdata.mode = USB_PERIPHERAL;
+ }
+ } else {
+ msm_otg_pdata.pmic_id_irq =
+ PM8038_USB_ID_IN_IRQ(PM8038_IRQ_BASE);
+ }
+
msm_otg_pdata.phy_init_seq = hsusb_phy_init_seq;
if (msm8930_mhl_display_enabled()) {
mhl_platform_data.mhl_enabled = true;