From fa846f5991de6c37db1f40e26a39f52c130f2bc7 Mon Sep 17 00:00:00 2001
From: Jonathan Bell <jonathan@raspberrypi.com>
Date: Mon, 13 Sep 2021 11:14:32 +0100
Subject: [PATCH 0519/1085] usb: dwc3: Set DMA and coherent masks early

dwc3 allocates scratch and event buffers in the top-level driver. Hack the
probe function to set the DMA mask before trying to allocate these.

I think the event buffers are only used in device mode, but the scratch
buffers may be used if core hibernation is enabled.

usb: dwc3: add support for new DT quirks

Apply the optional axi-pipe-limit and dis-in-autoretry-quirk properties
during driver probe.

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>

phy: phy-brcm-usb: Add 2712 support

usb: dwc3: if the host controller instance number is present in DT, use it

If two instances of a dwc3 host controller are specified in devicetree,
then the probe order may be arbitrary which results in the device names
swapping on a per-boot basis.

If a "usb" alias with the instance number is specified, then use
that to construct the device name instead of autogenerating one.

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>

rp1 dwc3 changes

drivers: usb: dwc3: allow setting GTXTHRCFG on dwc_usb3.0 hardware

Equivalent register fields exist in the SuperSpeed Host version of the
hardware, so allow the use of TX thresholds if specified in devicetree.

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>

drivers: usb: dwc3: remove downstream quirk dis-in-autoretry

Upstream have unilaterally disabled the feature.

Partially reverts 6e9142a26ee0fdc3a5adc49ed6cedc0b16ec2ed1 (downstream)

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
---
 drivers/phy/broadcom/Kconfig                  |  2 +-
 .../phy/broadcom/phy-brcm-usb-init-synopsys.c | 59 +++++++++++++++++++
 drivers/phy/broadcom/phy-brcm-usb-init.h      |  2 +
 drivers/phy/broadcom/phy-brcm-usb.c           | 18 +++++-
 drivers/usb/dwc3/core.c                       | 53 +++++++++++++++++
 drivers/usb/dwc3/core.h                       |  5 ++
 drivers/usb/dwc3/host.c                       |  9 ++-
 7 files changed, 145 insertions(+), 3 deletions(-)

--- a/drivers/phy/broadcom/Kconfig
+++ b/drivers/phy/broadcom/Kconfig
@@ -93,7 +93,7 @@ config PHY_BRCM_SATA
 
 config PHY_BRCM_USB
 	tristate "Broadcom STB USB PHY driver"
-	depends on ARCH_BCMBCA || ARCH_BRCMSTB || COMPILE_TEST
+	depends on ARCH_BCMBCA || ARCH_BRCMSTB || ARCH_BCM2835 || COMPILE_TEST
 	depends on OF
 	select GENERIC_PHY
 	select SOC_BRCMSTB if ARCH_BRCMSTB
--- a/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c
+++ b/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c
@@ -335,6 +335,36 @@ static void usb_init_common_7216(struct
 	usb_init_common(params);
 }
 
+static void usb_init_common_2712(struct brcm_usb_init_params *params)
+{
+	void __iomem *ctrl = params->regs[BRCM_REGS_CTRL];
+	void __iomem *bdc_ec = params->regs[BRCM_REGS_BDC_EC];
+	u32 reg;
+
+	if (params->syscon_piarbctl)
+		syscon_piarbctl_init(params->syscon_piarbctl);
+
+	USB_CTRL_UNSET(ctrl, USB_PM, USB_PWRDN);
+
+	usb_wake_enable_7211b0(params, false);
+
+	usb_init_common(params);
+
+	/*
+	 * The BDC controller will get occasional failures with
+	 * the default "Read Transaction Size" of 6 (1024 bytes).
+	 * Set it to 4 (256 bytes).
+	 */
+	if ((params->supported_port_modes != USB_CTLR_MODE_HOST) && bdc_ec) {
+		reg = brcm_usb_readl(bdc_ec + BDC_EC_AXIRDA);
+		reg &= ~BDC_EC_AXIRDA_RTS_MASK;
+		reg |= (0x4 << BDC_EC_AXIRDA_RTS_SHIFT);
+		brcm_usb_writel(reg, bdc_ec + BDC_EC_AXIRDA);
+	}
+
+	usb2_eye_fix_7211b0(params);
+}
+
 static void usb_init_xhci(struct brcm_usb_init_params *params)
 {
 	pr_debug("%s\n", __func__);
@@ -380,6 +410,18 @@ static void usb_uninit_common_7211b0(str
 
 }
 
+static void usb_uninit_common_2712(struct brcm_usb_init_params *params)
+{
+	void __iomem *ctrl = params->regs[BRCM_REGS_CTRL];
+
+	if (params->wake_enabled) {
+		USB_CTRL_SET(ctrl, TEST_PORT_CTL, TPOUT_SEL_PME_GEN);
+		usb_wake_enable_7211b0(params, true);
+	} else {
+		USB_CTRL_SET(ctrl, USB_PM, USB_PWRDN);
+	}
+}
+
 static void usb_uninit_xhci(struct brcm_usb_init_params *params)
 {
 
@@ -434,6 +476,16 @@ static const struct brcm_usb_init_ops bc
 	.set_dual_select = usb_set_dual_select,
 };
 
+static const struct brcm_usb_init_ops bcm2712_ops = {
+	.init_ipp = usb_init_ipp,
+	.init_common = usb_init_common_2712,
+	.init_xhci = usb_init_xhci,
+	.uninit_common = usb_uninit_common_2712,
+	.uninit_xhci = usb_uninit_xhci,
+	.get_dual_select = usb_get_dual_select,
+	.set_dual_select = usb_set_dual_select,
+};
+
 void brcm_usb_dvr_init_7216(struct brcm_usb_init_params *params)
 {
 
@@ -451,3 +503,10 @@ void brcm_usb_dvr_init_7211b0(struct brc
 	params->family_name = "7211";
 	params->ops = &bcm7211b0_ops;
 }
+
+void brcm_usb_dvr_init_2712(struct brcm_usb_init_params *params)
+{
+	params->family_name = "2712";
+	params->ops = &bcm2712_ops;
+	params->suspend_with_clocks = true;
+}
--- a/drivers/phy/broadcom/phy-brcm-usb-init.h
+++ b/drivers/phy/broadcom/phy-brcm-usb-init.h
@@ -70,12 +70,14 @@ struct  brcm_usb_init_params {
 	const struct brcm_usb_init_ops *ops;
 	struct regmap *syscon_piarbctl;
 	bool wake_enabled;
+	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);
+void brcm_usb_dvr_init_2712(struct brcm_usb_init_params *params);
 
 static inline u32 brcm_usb_readl(void __iomem *addr)
 {
--- a/drivers/phy/broadcom/phy-brcm-usb.c
+++ b/drivers/phy/broadcom/phy-brcm-usb.c
@@ -75,7 +75,7 @@ struct brcm_usb_phy_data {
 };
 
 static s8 *node_reg_names[BRCM_REGS_MAX] = {
-	"crtl", "xhci_ec", "xhci_gbl", "usb_phy", "usb_mdio", "bdc_ec"
+	"ctrl", "xhci_ec", "xhci_gbl", "usb_phy", "usb_mdio", "bdc_ec"
 };
 
 static int brcm_pm_notifier(struct notifier_block *notifier,
@@ -315,6 +315,18 @@ static const struct match_chip_info chip
 	.optional_reg = BRCM_REGS_BDC_EC,
 };
 
+static const struct match_chip_info chip_info_2712 = {
+	.init_func = &brcm_usb_dvr_init_2712,
+	.required_regs = {
+		BRCM_REGS_CTRL,
+		BRCM_REGS_XHCI_EC,
+		BRCM_REGS_XHCI_GBL,
+		BRCM_REGS_USB_MDIO,
+		-1,
+	},
+	.optional_reg = BRCM_REGS_BDC_EC,
+};
+
 static const struct match_chip_info chip_info_7445 = {
 	.init_func = &brcm_usb_dvr_init_7445,
 	.required_regs = {
@@ -338,6 +350,10 @@ static const struct of_device_id brcm_us
 		.data = &chip_info_7211b0,
 	},
 	{
+		.compatible = "brcm,bcm2712-usb-phy",
+		.data = &chip_info_2712,
+	},
+	{
 		.compatible = "brcm,brcmstb-usb-phy",
 		.data = &chip_info_7445,
 	},
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1181,6 +1181,24 @@ static void dwc3_config_threshold(struct
 	}
 }
 
+static void dwc3_set_axi_pipe_limit(struct dwc3 *dwc)
+{
+	struct device *dev = dwc->dev;
+	u32 cfg;
+
+	if (!dwc->axi_pipe_limit)
+		return;
+	if (dwc->axi_pipe_limit > 16) {
+		dev_err(dev, "Invalid axi_pipe_limit property\n");
+		return;
+	}
+	cfg = dwc3_readl(dwc->regs, DWC3_GSBUSCFG1);
+	cfg &= ~DWC3_GSBUSCFG1_PIPETRANSLIMIT(15);
+	cfg |= DWC3_GSBUSCFG1_PIPETRANSLIMIT(dwc->axi_pipe_limit - 1);
+
+	dwc3_writel(dwc->regs, DWC3_GSBUSCFG1, cfg);
+}
+
 /**
  * dwc3_core_init - Low-level initialization of DWC3 Core
  * @dwc: Pointer to our controller context structure
@@ -1246,6 +1264,8 @@ static int dwc3_core_init(struct dwc3 *d
 
 	dwc3_set_incr_burst_type(dwc);
 
+	dwc3_set_axi_pipe_limit(dwc);
+
 	ret = dwc3_phy_power_on(dwc);
 	if (ret)
 		goto err_exit_phy;
@@ -1320,6 +1340,24 @@ static int dwc3_core_init(struct dwc3 *d
 
 	dwc3_config_threshold(dwc);
 
+	if (DWC3_IP_IS(DWC3) && dwc->dr_mode == USB_DR_MODE_HOST) {
+		u8 tx_thr_num = dwc->tx_thr_num_pkt_prd;
+		u8 tx_maxburst = dwc->tx_max_burst_prd;
+
+		if (tx_thr_num && tx_maxburst) {
+			reg = dwc3_readl(dwc->regs, DWC3_GTXTHRCFG);
+			reg |= DWC3_GTXTHRCFG_PKTCNTSEL;
+
+			reg &= ~DWC3_GTXTHRCFG_TXPKTCNT(~0);
+			reg |= DWC3_GTXTHRCFG_TXPKTCNT(tx_thr_num);
+
+			reg &= ~DWC3_GTXTHRCFG_MAXTXBURSTSIZE(~0);
+			reg |= DWC3_GTXTHRCFG_MAXTXBURSTSIZE(tx_maxburst);
+
+			dwc3_writel(dwc->regs, DWC3_GTXTHRCFG, reg);
+		}
+	}
+
 	return 0;
 
 err_power_off_phy:
@@ -1463,6 +1501,7 @@ static void dwc3_get_properties(struct d
 	u8			tx_thr_num_pkt_prd = 0;
 	u8			tx_max_burst_prd = 0;
 	u8			tx_fifo_resize_max_num;
+	u8			axi_pipe_limit;
 	const char		*usb_psy_name;
 	int			ret;
 
@@ -1485,6 +1524,9 @@ static void dwc3_get_properties(struct d
 	 */
 	tx_fifo_resize_max_num = 6;
 
+	/* Default to 0 (don't override hardware defaults) */
+	axi_pipe_limit = 0;
+
 	dwc->maximum_speed = usb_get_maximum_speed(dev);
 	dwc->max_ssp_rate = usb_get_maximum_ssp_rate(dev);
 	dwc->dr_mode = usb_get_dr_mode(dev);
@@ -1606,6 +1648,9 @@ static void dwc3_get_properties(struct d
 	dwc->dis_split_quirk = device_property_read_bool(dev,
 				"snps,dis-split-quirk");
 
+	device_property_read_u8(dev, "snps,axi-pipe-limit",
+				   &axi_pipe_limit);
+
 	dwc->lpm_nyet_threshold = lpm_nyet_threshold;
 	dwc->tx_de_emphasis = tx_de_emphasis;
 
@@ -1623,6 +1668,8 @@ static void dwc3_get_properties(struct d
 	dwc->tx_thr_num_pkt_prd = tx_thr_num_pkt_prd;
 	dwc->tx_max_burst_prd = tx_max_burst_prd;
 
+	dwc->axi_pipe_limit = axi_pipe_limit;
+
 	dwc->imod_interval = 0;
 
 	dwc->tx_fifo_resize_max_num = tx_fifo_resize_max_num;
@@ -1898,6 +1945,12 @@ static int dwc3_probe(struct platform_de
 
 	dwc3_get_properties(dwc);
 
+	if (!dwc->sysdev_is_parent) {
+		ret = dma_set_mask_and_coherent(dwc->sysdev, DMA_BIT_MASK(64));
+		if (ret)
+			return ret;
+	}
+
 	dwc->reset = devm_reset_control_array_get_optional_shared(dev);
 	if (IS_ERR(dwc->reset)) {
 		ret = PTR_ERR(dwc->reset);
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -185,6 +185,9 @@
 #define DWC3_GSBUSCFG0_INCRBRSTENA	(1 << 0) /* undefined length enable */
 #define DWC3_GSBUSCFG0_INCRBRST_MASK	0xff
 
+/* Global SoC Bus Configuration Register 1 */
+#define DWC3_GSBUSCFG1_PIPETRANSLIMIT(n)	(((n) & 0xf) << 8)
+
 /* Global Debug LSP MUX Select */
 #define DWC3_GDBGLSPMUX_ENDBC		BIT(15)	/* Host only */
 #define DWC3_GDBGLSPMUX_HOSTSELECT(n)	((n) & 0x3fff)
@@ -1060,6 +1063,7 @@ struct dwc3_scratchpad_array {
  * @tx_max_burst_prd: max periodic ESS transmit burst size
  * @tx_fifo_resize_max_num: max number of fifos allocated during txfifo resize
  * @clear_stall_protocol: endpoint number that requires a delayed status phase
+ * @axi_max_pipe: set to override the maximum number of pipelined AXI transfers
  * @hsphy_interface: "utmi" or "ulpi"
  * @connected: true when we're connected to a host, false otherwise
  * @softconnect: true when gadget connect is called, false when disconnect runs
@@ -1294,6 +1298,7 @@ struct dwc3 {
 	u8			tx_max_burst_prd;
 	u8			tx_fifo_resize_max_num;
 	u8			clear_stall_protocol;
+	u8			axi_pipe_limit;
 
 	const char		*hsphy_interface;
 
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -82,16 +82,23 @@ out:
 
 int dwc3_host_init(struct dwc3 *dwc)
 {
+	struct platform_device	*pdev = to_platform_device(dwc->dev);
 	struct property_entry	props[5];
 	struct platform_device	*xhci;
 	int			ret, irq;
 	int			prop_idx = 0;
+	int			id;
 
 	irq = dwc3_host_get_irq(dwc);
 	if (irq < 0)
 		return irq;
 
-	xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
+	id = of_alias_get_id(pdev->dev.of_node, "usb");
+	if (id >= 0)
+		xhci = platform_device_alloc("xhci-hcd", id);
+	else
+		xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
+
 	if (!xhci) {
 		dev_err(dwc->dev, "couldn't allocate xHCI device\n");
 		return -ENOMEM;
