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Subject[PATCH v3 6/6] usb: host: tegra: Tegra30 support
Date
The Tegra30 EHCI controller is mostly compatible with the Tegra20
controller, except Tegra30 includes the HOSTPC register extension.
The has_hostpc capability bit must be set in the ehci_hcd structure if
the controller has such extensions. The new tegra_ehci_soc_config
structure is added to describe the differences between the SoCs.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
---
v3: Removed useless cast
drivers/usb/host/ehci-tegra.c | 34 +++++++++++++++++++++++++++++-----
1 file changed, 29 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index db8031f..78fa76d 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -25,6 +25,7 @@
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
@@ -50,6 +51,10 @@

static struct hc_driver __read_mostly tegra_ehci_hc_driver;

+struct tegra_ehci_soc_config {
+ bool has_hostpc;
+};
+
static int (*orig_hub_control)(struct usb_hcd *hcd,
u16 typeReq, u16 wValue, u16 wIndex,
char *buf, u16 wLength);
@@ -320,8 +325,24 @@ static void tegra_ehci_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
free_dma_aligned_buffer(urb);
}

+static const struct tegra_ehci_soc_config tegra30_soc_config = {
+ .has_hostpc = true,
+};
+
+static const struct tegra_ehci_soc_config tegra20_soc_config = {
+ .has_hostpc = false,
+};
+
+static struct of_device_id tegra_ehci_of_match[] = {
+ { .compatible = "nvidia,tegra30-ehci", .data = &tegra30_soc_config },
+ { .compatible = "nvidia,tegra20-ehci", .data = &tegra20_soc_config },
+ { },
+};
+
static int tegra_ehci_probe(struct platform_device *pdev)
{
+ const struct of_device_id *match;
+ const struct tegra_ehci_soc_config *soc_config;
struct resource *res;
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
@@ -330,6 +351,13 @@ static int tegra_ehci_probe(struct platform_device *pdev)
int irq;
struct usb_phy *u_phy;

+ match = of_match_device(tegra_ehci_of_match, &pdev->dev);
+ if (!match) {
+ dev_err(&pdev->dev, "Error: No device match found\n");
+ return -ENODEV;
+ }
+ soc_config = match->data;
+
/* Right now device-tree probed devices don't get dma_mask set.
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
@@ -391,6 +419,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
goto cleanup_clk_en;
}
ehci->caps = hcd->regs + 0x100;
+ ehci->has_hostpc = soc_config->has_hostpc;

err = usb_phy_init(hcd->phy);
if (err) {
@@ -468,11 +497,6 @@ static void tegra_ehci_hcd_shutdown(struct platform_device *pdev)
hcd->driver->shutdown(hcd);
}

-static struct of_device_id tegra_ehci_of_match[] = {
- { .compatible = "nvidia,tegra20-ehci", },
- { },
-};
-
static struct platform_driver tegra_ehci_driver = {
.probe = tegra_ehci_probe,
.remove = tegra_ehci_remove,
--
1.8.1.5


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