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Message-Id: <1342868333-10647-2-git-send-email-linux@prisktech.co.nz>
Date: Sat, 21 Jul 2012 22:58:53 +1200
From: Tony Prisk <linux@...sktech.co.nz>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Tony Prisk <linux@...sktech.co.nz>,
Alan Stern <stern@...land.harvard.edu>,
Grant Likely <grant.likely@...retlab.ca>,
Rob Herring <rob.herring@...xeda.com>,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree-discuss@...ts.ozlabs.org,
VT8500 mailing list
<vt8500-wm8505-linux-kernel@...glegroups.com>
Subject: [PATCHv4 2/2] ARM: vt8500: Add support for UHCI companion controller
Add support for a generic non-pci UHCI companion controller.
Existing board files for arch-vt8500 updated to include UHCI
support.
Signed-off-by: Tony Prisk <linux@...sktech.co.nz>
---
v4:
Add the binding documentation.
Changed the OF .compatibility to 'platform-uhci'
.../devicetree/bindings/usb/platform-uhci.txt | 12 ++
arch/arm/mach-vt8500/bv07.c | 1 +
arch/arm/mach-vt8500/devices-vt8500.c | 5 +
arch/arm/mach-vt8500/devices-wm8505.c | 4 +
arch/arm/mach-vt8500/devices.c | 11 ++
arch/arm/mach-vt8500/devices.h | 1 +
arch/arm/mach-vt8500/wm8505_7in.c | 1 +
drivers/usb/host/Kconfig | 12 ++-
drivers/usb/host/uhci-hcd.c | 5 +
drivers/usb/host/uhci-platform.c | 157 ++++++++++++++++++++
10 files changed, 207 insertions(+), 2 deletions(-)
create mode 100644 Documentation/devicetree/bindings/usb/platform-uhci.txt
create mode 100644 drivers/usb/host/uhci-platform.c
diff --git a/Documentation/devicetree/bindings/usb/platform-uhci.txt b/Documentation/devicetree/bindings/usb/platform-uhci.txt
new file mode 100644
index 0000000..91477d6
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/platform-uhci.txt
@@ -0,0 +1,12 @@
+Generic Platform UHCI controllers.
+
+Required properties:
+ - compatible: Should be "platform-uhci".
+ - reg: Address range of the uhci registers
+ - interrupts: Should contain the uhci interrupt.
+
+usb: uhci@...07301 {
+ compatible = "platform-uhci", "usb-uhci";
+ reg = <0xD8007301 0x200>;
+ interrupts = <0>;
+};
diff --git a/arch/arm/mach-vt8500/bv07.c b/arch/arm/mach-vt8500/bv07.c
index a464c75..19d20d9 100644
--- a/arch/arm/mach-vt8500/bv07.c
+++ b/arch/arm/mach-vt8500/bv07.c
@@ -32,6 +32,7 @@ static struct platform_device *devices[] __initdata = {
&vt8500_device_uart0,
&vt8500_device_lcdc,
&vt8500_device_ehci,
+ &vt8500_device_uhci,
&vt8500_device_ge_rops,
&vt8500_device_pwm,
&vt8500_device_pwmbl,
diff --git a/arch/arm/mach-vt8500/devices-vt8500.c b/arch/arm/mach-vt8500/devices-vt8500.c
index 19519ae..def7fe3 100644
--- a/arch/arm/mach-vt8500/devices-vt8500.c
+++ b/arch/arm/mach-vt8500/devices-vt8500.c
@@ -48,6 +48,11 @@ void __init vt8500_set_resources(void)
tmp[1] = wmt_irq_res(IRQ_EHCI);
wmt_res_add(&vt8500_device_ehci, tmp, 2);
+ /* vt8500 uses a single IRQ for both EHCI and UHCI controllers */
+ tmp[0] = wmt_mmio_res(VT8500_UHCI_BASE, SZ_512);
+ tmp[1] = wmt_irq_res(IRQ_EHCI);
+ wmt_res_add(&vt8500_device_uhci, tmp, 2);
+
tmp[0] = wmt_mmio_res(VT8500_GEGEA_BASE, SZ_256);
wmt_res_add(&vt8500_device_ge_rops, tmp, 1);
diff --git a/arch/arm/mach-vt8500/devices-wm8505.c b/arch/arm/mach-vt8500/devices-wm8505.c
index db4594e..c810454 100644
--- a/arch/arm/mach-vt8500/devices-wm8505.c
+++ b/arch/arm/mach-vt8500/devices-wm8505.c
@@ -55,6 +55,10 @@ void __init wm8505_set_resources(void)
tmp[1] = wmt_irq_res(IRQ_EHCI);
wmt_res_add(&vt8500_device_ehci, tmp, 2);
+ tmp[0] = wmt_mmio_res(WM8505_UHCI_BASE, SZ_512);
+ tmp[1] = wmt_irq_res(IRQ_UHCI);
+ wmt_res_add(&vt8500_device_uhci, tmp, 2);
+
tmp[0] = wmt_mmio_res(WM8505_GEGEA_BASE, SZ_256);
wmt_res_add(&vt8500_device_ge_rops, tmp, 1);
diff --git a/arch/arm/mach-vt8500/devices.c b/arch/arm/mach-vt8500/devices.c
index 1fcdc36..46ff82d 100644
--- a/arch/arm/mach-vt8500/devices.c
+++ b/arch/arm/mach-vt8500/devices.c
@@ -204,6 +204,17 @@ struct platform_device vt8500_device_ehci = {
},
};
+static u64 uhci_dma_mask = DMA_BIT_MASK(32);
+
+struct platform_device vt8500_device_uhci = {
+ .name = "platform-uhci",
+ .id = 0,
+ .dev = {
+ .dma_mask = &uhci_dma_mask,
+ .coherent_dma_mask = DMA_BIT_MASK(32),
+ },
+};
+
struct platform_device vt8500_device_ge_rops = {
.name = "wmt_ge_rops",
.id = -1,
diff --git a/arch/arm/mach-vt8500/devices.h b/arch/arm/mach-vt8500/devices.h
index 188d4e1..0e6d9f9 100644
--- a/arch/arm/mach-vt8500/devices.h
+++ b/arch/arm/mach-vt8500/devices.h
@@ -81,6 +81,7 @@ extern struct platform_device vt8500_device_uart5;
extern struct platform_device vt8500_device_lcdc;
extern struct platform_device vt8500_device_wm8505_fb;
extern struct platform_device vt8500_device_ehci;
+extern struct platform_device vt8500_device_uhci;
extern struct platform_device vt8500_device_ge_rops;
extern struct platform_device vt8500_device_pwm;
extern struct platform_device vt8500_device_pwmbl;
diff --git a/arch/arm/mach-vt8500/wm8505_7in.c b/arch/arm/mach-vt8500/wm8505_7in.c
index cf910a9..302ae2f 100644
--- a/arch/arm/mach-vt8500/wm8505_7in.c
+++ b/arch/arm/mach-vt8500/wm8505_7in.c
@@ -31,6 +31,7 @@ static void __iomem *pmc_hiber;
static struct platform_device *devices[] __initdata = {
&vt8500_device_uart0,
&vt8500_device_ehci,
+ &vt8500_device_uhci,
&vt8500_device_wm8505_fb,
&vt8500_device_ge_rops,
&vt8500_device_pwm,
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 83e58df..3d153d0 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -450,7 +450,7 @@ config USB_OHCI_LITTLE_ENDIAN
config USB_UHCI_HCD
tristate "UHCI HCD (most Intel and VIA) support"
- depends on USB && (PCI || SPARC_LEON)
+ depends on USB && (PCI || SPARC_LEON || ARCH_VT8500)
---help---
The Universal Host Controller Interface is a standard by Intel for
accessing the USB hardware in the PC (which is also called the USB
@@ -468,7 +468,15 @@ config USB_UHCI_HCD
config USB_UHCI_SUPPORT_NON_PCI_HC
bool
depends on USB_UHCI_HCD
- default y if SPARC_LEON
+ default y if (SPARC_LEON || ARCH_VT8500)
+
+config USB_UHCI_PLATFORM
+ bool "Generic UHCI Platform Driver support"
+ depends on USB_UHCI_SUPPORT_NON_PCI_HC
+ default y if ARCH_VT8500
+ ---help---
+ Enable support for generic UHCI platform devices that require no
+ additional configuration.
config USB_UHCI_BIG_ENDIAN_MMIO
bool
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index e4db350..4b9e9ab 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -846,6 +846,11 @@ static const char hcd_name[] = "uhci_hcd";
#define PLATFORM_DRIVER uhci_grlib_driver
#endif
+#ifdef CONFIG_USB_UHCI_PLATFORM
+#include "uhci-platform.c"
+#define PLATFORM_DRIVER uhci_platform_driver
+#endif
+
#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER)
#error "missing bus glue for uhci-hcd"
#endif
diff --git a/drivers/usb/host/uhci-platform.c b/drivers/usb/host/uhci-platform.c
new file mode 100644
index 0000000..e478049
--- /dev/null
+++ b/drivers/usb/host/uhci-platform.c
@@ -0,0 +1,157 @@
+/*
+ * Generic UHCI HCD (Host Controller Driver) for Platform Devices
+ *
+ * Copyright (c) 2011 Tony Prisk <linux@...sktech.co.nz>
+ *
+ * This file is based on uhci-grlib.c
+ * (C) Copyright 2004-2007 Alan Stern, stern@...land.harvard.edu
+ */
+
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+static int uhci_platform_init(struct usb_hcd *hcd)
+{
+ struct uhci_hcd *uhci = hcd_to_uhci(hcd);
+
+ uhci->rh_numports = uhci_count_ports(hcd);
+
+ /* Set up pointers to to generic functions */
+ uhci->reset_hc = uhci_generic_reset_hc;
+ uhci->check_and_reset_hc = uhci_generic_check_and_reset_hc;
+
+ /* No special actions need to be taken for the functions below */
+ uhci->configure_hc = NULL;
+ uhci->resume_detect_interrupts_are_broken = NULL;
+ uhci->global_suspend_mode_is_broken = NULL;
+
+ /* Reset if the controller isn't already safely quiescent. */
+ check_and_reset_hc(uhci);
+ return 0;
+}
+
+static const struct hc_driver uhci_platform_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "Generic UHCI Host Controller",
+ .hcd_priv_size = sizeof(struct uhci_hcd),
+
+ /* Generic hardware linkage */
+ .irq = uhci_irq,
+ .flags = HCD_MEMORY | HCD_USB11,
+
+ /* Basic lifecycle operations */
+ .reset = uhci_platform_init,
+ .start = uhci_start,
+#ifdef CONFIG_PM
+ .pci_suspend = NULL,
+ .pci_resume = NULL,
+ .bus_suspend = uhci_rh_suspend,
+ .bus_resume = uhci_rh_resume,
+#endif
+ .stop = uhci_stop,
+
+ .urb_enqueue = uhci_urb_enqueue,
+ .urb_dequeue = uhci_urb_dequeue,
+
+ .endpoint_disable = uhci_hcd_endpoint_disable,
+ .get_frame_number = uhci_hcd_get_frame_number,
+
+ .hub_status_data = uhci_hub_status_data,
+ .hub_control = uhci_hub_control,
+};
+
+
+static int __devinit uhci_hcd_platform_probe(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd;
+ struct uhci_hcd *uhci;
+ struct resource *res;
+ int ret;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ hcd = usb_create_hcd(&uhci_platform_hc_driver, &pdev->dev,
+ pdev->name);
+ if (!hcd)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hcd->rsrc_start = res->start;
+ hcd->rsrc_len = resource_size(res);
+
+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+ pr_err("%s: request_mem_region failed\n", __func__);
+ ret = -EBUSY;
+ goto err_rmr;
+ }
+
+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+ if (!hcd->regs) {
+ pr_err("%s: ioremap failed\n", __func__);
+ ret = -ENOMEM;
+ goto err_irq;
+ }
+ uhci = hcd_to_uhci(hcd);
+
+ uhci->regs = hcd->regs;
+
+ ret = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED |
+ IRQF_SHARED);
+ if (ret)
+ goto err_uhci;
+
+ return 0;
+
+err_uhci:
+ iounmap(hcd->regs);
+err_irq:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err_rmr:
+ usb_put_hcd(hcd);
+
+ return ret;
+}
+
+static int uhci_hcd_platform_remove(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+ usb_remove_hcd(hcd);
+ iounmap(hcd->regs);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ usb_put_hcd(hcd);
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+/* Make sure the controller is quiescent and that we're not using it
+ * any more. This is mainly for the benefit of programs which, like kexec,
+ * expect the hardware to be idle: not doing DMA or generating IRQs.
+ *
+ * This routine may be called in a damaged or failing kernel. Hence we
+ * do not acquire the spinlock before shutting down the controller.
+ */
+static void uhci_hcd_platform_shutdown(struct platform_device *op)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
+
+ uhci_hc_died(hcd_to_uhci(hcd));
+}
+
+static const struct of_device_id platform_uhci_ids[] = {
+ { .compatible = "platform-uhci", },
+ {}
+};
+
+static struct platform_driver uhci_platform_driver = {
+ .probe = uhci_hcd_platform_probe,
+ .remove = uhci_hcd_platform_remove,
+ .shutdown = uhci_hcd_platform_shutdown,
+ .driver = {
+ .name = "platform-uhci",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(platform_uhci_ids),
+ },
+};
--
1.7.2.5
--
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