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path: root/drivers/usb/host/ehci-tegra.c
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Diffstat (limited to 'drivers/usb/host/ehci-tegra.c')
-rw-r--r--drivers/usb/host/ehci-tegra.c97
1 files changed, 65 insertions, 32 deletions
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index acf17556bd8..568aecc7075 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -2,7 +2,7 @@
* EHCI-compliant USB host controller driver for NVIDIA Tegra SoCs
*
* Copyright (C) 2010 Google, Inc.
- * Copyright (C) 2009 NVIDIA Corporation
+ * Copyright (C) 2009 - 2013 NVIDIA Corporation
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
@@ -26,23 +26,28 @@
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/pm_runtime.h>
-
+#include <linux/usb/ehci_def.h>
#include <linux/usb/tegra_usb_phy.h>
#define TEGRA_USB_BASE 0xC5000000
#define TEGRA_USB2_BASE 0xC5004000
#define TEGRA_USB3_BASE 0xC5008000
+/* PORTSC registers */
+#define TEGRA_USB_PORTSC1 0x184
+#define TEGRA_USB_PORTSC1_PTS(x) (((x) & 0x3) << 30)
+#define TEGRA_USB_PORTSC1_PHCD (1 << 23)
+
#define TEGRA_USB_DMA_ALIGN 32
struct tegra_ehci_hcd {
struct ehci_hcd *ehci;
struct tegra_usb_phy *phy;
struct clk *clk;
- struct clk *emc_clk;
struct usb_phy *transceiver;
int host_resumed;
int port_resuming;
+ bool needs_double_reset;
enum tegra_usb_phy_port_speed port_speed;
};
@@ -50,9 +55,8 @@ static void tegra_ehci_power_up(struct usb_hcd *hcd)
{
struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
- clk_prepare_enable(tegra->emc_clk);
clk_prepare_enable(tegra->clk);
- usb_phy_set_suspend(&tegra->phy->u_phy, 0);
+ usb_phy_set_suspend(hcd->phy, 0);
tegra->host_resumed = 1;
}
@@ -61,9 +65,8 @@ static void tegra_ehci_power_down(struct usb_hcd *hcd)
struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
tegra->host_resumed = 0;
- usb_phy_set_suspend(&tegra->phy->u_phy, 1);
+ usb_phy_set_suspend(hcd->phy, 1);
clk_disable_unprepare(tegra->clk);
- clk_disable_unprepare(tegra->emc_clk);
}
static int tegra_ehci_internal_port_reset(
@@ -156,7 +159,7 @@ static int tegra_ehci_hub_control(
if (tegra->port_resuming && !(temp & PORT_SUSPEND)) {
/* Resume completed, re-enable disconnect detection */
tegra->port_resuming = 0;
- tegra_usb_phy_postresume(tegra->phy);
+ tegra_usb_phy_postresume(hcd->phy);
}
}
@@ -184,7 +187,7 @@ static int tegra_ehci_hub_control(
}
/* For USB1 port we need to issue Port Reset twice internally */
- if (tegra->phy->instance == 0 &&
+ if (tegra->needs_double_reset &&
(typeReq == SetPortFeature && wValue == USB_PORT_FEAT_RESET)) {
spin_unlock_irqrestore(&ehci->lock, flags);
return tegra_ehci_internal_port_reset(ehci, status_reg);
@@ -209,7 +212,7 @@ static int tegra_ehci_hub_control(
goto done;
/* Disable disconnect detection during port resume */
- tegra_usb_phy_preresume(tegra->phy);
+ tegra_usb_phy_preresume(hcd->phy);
ehci->reset_done[wIndex-1] = jiffies + msecs_to_jiffies(25);
@@ -473,7 +476,7 @@ static int controller_resume(struct device *dev)
}
/* Force the phy to keep data lines in suspend state */
- tegra_ehci_phy_restore_start(tegra->phy, tegra->port_speed);
+ tegra_ehci_phy_restore_start(hcd->phy, tegra->port_speed);
/* Enable host mode */
tdi_reset(ehci);
@@ -540,17 +543,17 @@ static int controller_resume(struct device *dev)
}
}
- tegra_ehci_phy_restore_end(tegra->phy);
+ tegra_ehci_phy_restore_end(hcd->phy);
goto done;
restart:
if (tegra->port_speed <= TEGRA_USB_PHY_PORT_SPEED_HIGH)
- tegra_ehci_phy_restore_end(tegra->phy);
+ tegra_ehci_phy_restore_end(hcd->phy);
tegra_ehci_restart(hcd);
done:
- tegra_usb_phy_preresume(tegra->phy);
+ tegra_usb_phy_preresume(hcd->phy);
tegra->port_resuming = 1;
return 0;
}
@@ -604,6 +607,37 @@ static const struct dev_pm_ops tegra_ehci_pm_ops = {
#endif
+/* Bits of PORTSC1, which will get cleared by writing 1 into them */
+#define TEGRA_PORTSC1_RWC_BITS (PORT_CSC | PORT_PEC | PORT_OCC)
+
+void tegra_ehci_set_pts(struct usb_phy *x, u8 pts_val)
+{
+ unsigned long val;
+ struct usb_hcd *hcd = bus_to_hcd(x->otg->host);
+ void __iomem *base = hcd->regs;
+
+ val = readl(base + TEGRA_USB_PORTSC1) & ~TEGRA_PORTSC1_RWC_BITS;
+ val &= ~TEGRA_USB_PORTSC1_PTS(3);
+ val |= TEGRA_USB_PORTSC1_PTS(pts_val & 3);
+ writel(val, base + TEGRA_USB_PORTSC1);
+}
+EXPORT_SYMBOL_GPL(tegra_ehci_set_pts);
+
+void tegra_ehci_set_phcd(struct usb_phy *x, bool enable)
+{
+ unsigned long val;
+ struct usb_hcd *hcd = bus_to_hcd(x->otg->host);
+ void __iomem *base = hcd->regs;
+
+ val = readl(base + TEGRA_USB_PORTSC1) & ~TEGRA_PORTSC1_RWC_BITS;
+ if (enable)
+ val |= TEGRA_USB_PORTSC1_PHCD;
+ else
+ val &= ~TEGRA_USB_PORTSC1_PHCD;
+ writel(val, base + TEGRA_USB_PORTSC1);
+}
+EXPORT_SYMBOL_GPL(tegra_ehci_set_phcd);
+
static u64 tegra_ehci_dma_mask = DMA_BIT_MASK(32);
static int tegra_ehci_probe(struct platform_device *pdev)
@@ -615,6 +649,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
int err = 0;
int irq;
int instance = pdev->id;
+ struct usb_phy *u_phy;
pdata = pdev->dev.platform_data;
if (!pdata) {
@@ -656,15 +691,8 @@ static int tegra_ehci_probe(struct platform_device *pdev)
if (err)
goto fail_clk;
- tegra->emc_clk = devm_clk_get(&pdev->dev, "emc");
- if (IS_ERR(tegra->emc_clk)) {
- dev_err(&pdev->dev, "Can't get emc clock\n");
- err = PTR_ERR(tegra->emc_clk);
- goto fail_emc_clk;
- }
-
- clk_prepare_enable(tegra->emc_clk);
- clk_set_rate(tegra->emc_clk, 400000000);
+ tegra->needs_double_reset = of_property_read_bool(pdev->dev.of_node,
+ "nvidia,needs-double-reset");
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
@@ -712,9 +740,19 @@ static int tegra_ehci_probe(struct platform_device *pdev)
goto fail_io;
}
- usb_phy_init(&tegra->phy->u_phy);
+ hcd->phy = u_phy = &tegra->phy->u_phy;
+ usb_phy_init(hcd->phy);
- err = usb_phy_set_suspend(&tegra->phy->u_phy, 0);
+ u_phy->otg = devm_kzalloc(&pdev->dev, sizeof(struct usb_otg),
+ GFP_KERNEL);
+ if (!u_phy->otg) {
+ dev_err(&pdev->dev, "Failed to alloc memory for otg\n");
+ err = -ENOMEM;
+ goto fail_io;
+ }
+ u_phy->otg->host = hcd_to_bus(hcd);
+
+ err = usb_phy_set_suspend(hcd->phy, 0);
if (err) {
dev_err(&pdev->dev, "Failed to power on the phy\n");
goto fail;
@@ -760,10 +798,8 @@ fail:
if (!IS_ERR_OR_NULL(tegra->transceiver))
otg_set_host(tegra->transceiver->otg, NULL);
#endif
- usb_phy_shutdown(&tegra->phy->u_phy);
+ usb_phy_shutdown(hcd->phy);
fail_io:
- clk_disable_unprepare(tegra->emc_clk);
-fail_emc_clk:
clk_disable_unprepare(tegra->clk);
fail_clk:
usb_put_hcd(hcd);
@@ -784,15 +820,12 @@ static int tegra_ehci_remove(struct platform_device *pdev)
otg_set_host(tegra->transceiver->otg, NULL);
#endif
+ usb_phy_shutdown(hcd->phy);
usb_remove_hcd(hcd);
usb_put_hcd(hcd);
- usb_phy_shutdown(&tegra->phy->u_phy);
-
clk_disable_unprepare(tegra->clk);
- clk_disable_unprepare(tegra->emc_clk);
-
return 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 22:28:59 +0000