bcm4908: fix USB PHY support

This fixes problem with USB PHY not handling some USB 3.0 devices.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 0dbcefdd5229daacf6cd4c9996b8e6f31c90ffd1)

1 files changed, 147 insertions, 0 deletions

diff --git a/target/linux/bcm4908/patches-5.4/088-v5.18-phy-phy-brcm-usb-fixup-BCM4908-support.patch b/target/linux/bcm4908/patches-5.4/088-v5.18-phy-phy-brcm-usb-fixup-BCM4908-support.patch
new file mode 100644
index 0000000000..a9568bcbba
--- /dev/null
+++ b/target/linux/bcm4908/patches-5.4/088-v5.18-phy-phy-brcm-usb-fixup-BCM4908-support.patch
@@ -0,0 +1,147 @@
+From 32942d33d63d27714ed16a4176e5a99547adb6e0 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Fri, 18 Feb 2022 18:24:59 +0100
+Subject: [PATCH] phy: phy-brcm-usb: fixup BCM4908 support
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Just like every other family BCM4908 should get its own enum value. That
+is required to properly handle it in chipset conditional code.
+
+The real change is excluding BCM4908 from the PLL reprogramming code
+(see brcmusb_usb3_pll_54mhz()). I'm not sure what's the BCM4908
+reference clock frequency but:
+1. BCM4908 custom driver from Broadcom's SDK doesn't reprogram PLL
+2. Doing that in Linux driver stopped PHY handling some USB 3.0 devices
+
+This change makes USB 3.0 PHY recognize e.g.:
+1. 04e8:6860 - Samsung Electronics Co., Ltd Galaxy series, misc. (MTP mode)
+2. 1058:259f - Western Digital My Passport 259F
+
+Broadcom's STB SoCs come with a set of SUN_TOP_CTRL_* registers that
+allow reading chip family and product ids. Such a block & register is
+missing on BCM4908 so this commit introduces "compatible" string
+specific binding.
+
+Fixes: 4b402fa8e0b7 ("phy: phy-brcm-usb: support PHY on the BCM4908")
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Link: https://lore.kernel.org/r/20220218172459.10431-1-zajec5@gmail.com
+Signed-off-by: Vinod Koul <vkoul@kernel.org>
+---
+ drivers/phy/broadcom/phy-brcm-usb-init.c | 36 ++++++++++++++++++++++++
+ drivers/phy/broadcom/phy-brcm-usb-init.h |  1 +
+ drivers/phy/broadcom/phy-brcm-usb.c      | 11 +++++++-
+ 3 files changed, 47 insertions(+), 1 deletion(-)
+
+--- a/drivers/phy/broadcom/phy-brcm-usb-init.c
++++ b/drivers/phy/broadcom/phy-brcm-usb-init.c
+@@ -79,6 +79,7 @@
+ 
+ enum brcm_family_type {
+ 	BRCM_FAMILY_3390A0,
++	BRCM_FAMILY_4908,
+ 	BRCM_FAMILY_7250B0,
+ 	BRCM_FAMILY_7271A0,
+ 	BRCM_FAMILY_7364A0,
+@@ -96,6 +97,7 @@ enum brcm_family_type {
+ 
+ static const char *family_names[BRCM_FAMILY_COUNT] = {
+ 	USB_BRCM_FAMILY(3390A0),
++	USB_BRCM_FAMILY(4908),
+ 	USB_BRCM_FAMILY(7250B0),
+ 	USB_BRCM_FAMILY(7271A0),
+ 	USB_BRCM_FAMILY(7364A0),
+@@ -203,6 +205,27 @@ usb_reg_bits_map_table[BRCM_FAMILY_COUNT
+ 		USB_CTRL_USB_PM_USB20_HC_RESETB_VAR_MASK,
+ 		ENDIAN_SETTINGS, /* USB_CTRL_SETUP ENDIAN bits */
+ 	},
++	/* 4908 */
++	[BRCM_FAMILY_4908] = {
++		0, /* USB_CTRL_SETUP_SCB1_EN_MASK */
++		0, /* USB_CTRL_SETUP_SCB2_EN_MASK */
++		0, /* USB_CTRL_SETUP_SS_EHCI64BIT_EN_MASK */
++		0, /* USB_CTRL_SETUP_STRAP_IPP_SEL_MASK */
++		0, /* USB_CTRL_SETUP_OC3_DISABLE_MASK */
++		0, /* USB_CTRL_PLL_CTL_PLL_IDDQ_PWRDN_MASK */
++		0, /* USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK */
++		USB_CTRL_USB_PM_XHC_SOFT_RESETB_MASK,
++		USB_CTRL_USB_PM_USB_PWRDN_MASK,
++		0, /* USB_CTRL_USB30_CTL1_XHC_SOFT_RESETB_MASK */
++		0, /* USB_CTRL_USB30_CTL1_USB3_IOC_MASK */
++		0, /* USB_CTRL_USB30_CTL1_USB3_IPP_MASK */
++		0, /* USB_CTRL_USB_DEVICE_CTL1_PORT_MODE_MASK */
++		0, /* USB_CTRL_USB_PM_SOFT_RESET_MASK */
++		0, /* USB_CTRL_SETUP_CC_DRD_MODE_ENABLE_MASK */
++		0, /* USB_CTRL_SETUP_STRAP_CC_DRD_MODE_ENABLE_SEL_MASK */
++		0, /* USB_CTRL_USB_PM_USB20_HC_RESETB_VAR_MASK */
++		0, /* USB_CTRL_SETUP ENDIAN bits */
++	},
+ 	/* 7250b0 */
+ 	[BRCM_FAMILY_7250B0] = {
+ 		USB_CTRL_SETUP_SCB1_EN_MASK,
+@@ -559,6 +582,7 @@ static void brcmusb_usb3_pll_54mhz(struc
+ 	 */
+ 	switch (params->selected_family) {
+ 	case BRCM_FAMILY_3390A0:
++	case BRCM_FAMILY_4908:
+ 	case BRCM_FAMILY_7250B0:
+ 	case BRCM_FAMILY_7366C0:
+ 	case BRCM_FAMILY_74371A0:
+@@ -1004,6 +1028,18 @@ static const struct brcm_usb_init_ops bc
+ 	.set_dual_select = usb_set_dual_select,
+ };
+ 
++void brcm_usb_dvr_init_4908(struct brcm_usb_init_params *params)
++{
++	int fam;
++
++	fam = BRCM_FAMILY_4908;
++	params->selected_family = fam;
++	params->usb_reg_bits_map =
++		&usb_reg_bits_map_table[fam][0];
++	params->family_name = family_names[fam];
++	params->ops = &bcm7445_ops;
++}
++
+ void brcm_usb_dvr_init_7445(struct brcm_usb_init_params *params)
+ {
+ 	int fam;
+--- a/drivers/phy/broadcom/phy-brcm-usb-init.h
++++ b/drivers/phy/broadcom/phy-brcm-usb-init.h
+@@ -64,6 +64,7 @@ struct  brcm_usb_init_params {
+ 	bool suspend_with_clocks;
+ };
+ 
++void brcm_usb_dvr_init_4908(struct brcm_usb_init_params *params);
+ void brcm_usb_dvr_init_7445(struct brcm_usb_init_params *params);
+ void brcm_usb_dvr_init_7216(struct brcm_usb_init_params *params);
+ void brcm_usb_dvr_init_7211b0(struct brcm_usb_init_params *params);
+--- a/drivers/phy/broadcom/phy-brcm-usb.c
++++ b/drivers/phy/broadcom/phy-brcm-usb.c
+@@ -253,6 +253,15 @@ static const struct attribute_group brcm
+ 	.attrs = brcm_usb_phy_attrs,
+ };
+ 
++static const struct match_chip_info chip_info_4908 = {
++	.init_func = &brcm_usb_dvr_init_4908,
++	.required_regs = {
++		BRCM_REGS_CTRL,
++		BRCM_REGS_XHCI_EC,
++		-1,
++	},
++};
++
+ static const struct match_chip_info chip_info_7216 = {
+ 	.init_func = &brcm_usb_dvr_init_7216,
+ 	.required_regs = {
+@@ -288,7 +297,7 @@ static const struct match_chip_info chip
+ static const struct of_device_id brcm_usb_dt_ids[] = {
+ 	{
+ 		.compatible = "brcm,bcm4908-usb-phy",
+-		.data = &chip_info_7445,
++		.data = &chip_info_4908,
+ 	},
+ 	{
+ 		.compatible = "brcm,bcm7216-usb-phy",