[PATCH V2 19/69] USB host: Adding USB ehci & ohci support for spear platform
Viresh KUMAR
viresh.kumar at st.com
Fri Oct 1 07:55:39 EDT 2010
From: Deepak Sikri <deepak.sikri at st.com>
This patch adds support for ehci and ohci controller in the SPEAr platform
Signed-off-by: Deepak Sikri <deepak.sikri at st.com>
Signed-off-by: Viresh Kumar <viresh.kumar at st.com>
---
drivers/usb/Kconfig | 2 +
drivers/usb/host/ehci-hcd.c | 5 +
drivers/usb/host/ehci-spear.c | 211 ++++++++++++++++++++++++++++++++++++
drivers/usb/host/ohci-hcd.c | 5 +
drivers/usb/host/ohci-spear.c | 240 +++++++++++++++++++++++++++++++++++++++++
5 files changed, 463 insertions(+), 0 deletions(-)
create mode 100644 drivers/usb/host/ehci-spear.c
create mode 100644 drivers/usb/host/ohci-spear.c
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 4aa00e6..108f69d 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -41,6 +41,7 @@ config USB_ARCH_HAS_OHCI
default y if MFD_TC6393XB
default y if ARCH_W90X900
default y if ARCH_DAVINCI_DA8XX
+ default y if PLAT_SPEAR
# PPC:
default y if STB03xxx
default y if PPC_MPC52xx
@@ -65,6 +66,7 @@ config USB_ARCH_HAS_EHCI
default y if ARCH_AT91SAM9G45
default y if ARCH_MXC
default y if ARCH_OMAP3
+ default y if PLAT_SPEAR
default PCI
# ARM SA1111 chips have a non-PCI based "OHCI-compatible" USB host interface.
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 34a928d..2101725 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1197,6 +1197,11 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ehci_atmel_driver
#endif
+#ifdef CONFIG_PLAT_SPEAR
+#include "ehci-spear.c"
+#define PLATFORM_DRIVER spear_ehci_hcd_driver
+#endif
+
#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
!defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
!defined(XILINX_OF_PLATFORM_DRIVER)
diff --git a/drivers/usb/host/ehci-spear.c b/drivers/usb/host/ehci-spear.c
new file mode 100644
index 0000000..b586fe9
--- /dev/null
+++ b/drivers/usb/host/ehci-spear.c
@@ -0,0 +1,211 @@
+/*
+* Driver for EHCI HCD on SPEAR SOC
+*
+* Copyright (C) 2010 ST Micro Electronics,
+* Deepak Sikri <deepak.sikri at st.com>
+*
+* Based on various ehci-*.c drivers
+*
+* This file is subject to the terms and conditions of the GNU General Public
+* License. See the file COPYING in the main directory of this archive for
+* more details.
+*/
+
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+
+struct spear_ehci {
+ struct ehci_hcd ehci;
+ struct clk *clk;
+};
+
+#define to_spear_ehci(hcd) (struct spear_ehci *)hcd_to_ehci(hcd)
+
+static void spear_start_ehci(struct spear_ehci *ehci)
+{
+ clk_enable(ehci->clk);
+}
+
+static void spear_stop_ehci(struct spear_ehci *ehci)
+{
+ clk_disable(ehci->clk);
+}
+
+static int ehci_spear_setup(struct usb_hcd *hcd)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ int retval = 0;
+
+ /* registers start at offset 0x0 */
+ ehci->caps = hcd->regs;
+ ehci->regs = hcd->regs + HC_LENGTH(ehci_readl(ehci,
+ &ehci->caps->hc_capbase));
+ /* cache this readonly data; minimize chip reads */
+ ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+ retval = ehci_halt(ehci);
+ if (retval)
+ return retval;
+
+ retval = ehci_init(hcd);
+ if (retval)
+ return retval;
+
+ ehci_reset(ehci);
+ ehci_port_power(ehci, 0);
+
+ return retval;
+}
+
+static const struct hc_driver ehci_spear_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "SPEAr EHCI",
+ .hcd_priv_size = sizeof(struct spear_ehci),
+
+ /* generic hardware linkage */
+ .irq = ehci_irq,
+ .flags = HCD_MEMORY | HCD_USB2,
+
+ /* basic lifecycle operations */
+ .reset = ehci_spear_setup,
+ .start = ehci_run,
+ .stop = ehci_stop,
+ .shutdown = ehci_shutdown,
+
+ /* managing i/o requests and associated device resources */
+ .urb_enqueue = ehci_urb_enqueue,
+ .urb_dequeue = ehci_urb_dequeue,
+ .endpoint_disable = ehci_endpoint_disable,
+ .endpoint_reset = ehci_endpoint_reset,
+
+ /* scheduling support */
+ .get_frame_number = ehci_get_frame,
+
+ /* root hub support */
+ .hub_status_data = ehci_hub_status_data,
+ .hub_control = ehci_hub_control,
+ .bus_suspend = ehci_bus_suspend,
+ .bus_resume = ehci_bus_resume,
+ .relinquish_port = ehci_relinquish_port,
+ .port_handed_over = ehci_port_handed_over,
+};
+
+static int spear_ehci_hcd_drv_probe(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd ;
+ struct spear_ehci *ehci;
+ struct resource *res;
+ struct clk *usbh_clk;
+ const struct hc_driver *driver = &ehci_spear_hc_driver;
+ int *pdata = pdev->dev.platform_data;
+ int irq, retval;
+ char clk_name[20] = "usbh_clk";
+
+ if (pdata == NULL)
+ return -EFAULT;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ retval = irq;
+ goto fail_irq_get;
+ }
+
+ if (*pdata >= 0)
+ sprintf(clk_name, "usbh.%01d_clk", *pdata);
+
+ usbh_clk = clk_get(NULL, clk_name);
+ if (IS_ERR(usbh_clk)) {
+ dev_err(&pdev->dev, "Error getting interface clock\n");
+ retval = PTR_ERR(usbh_clk);
+ goto fail_get_usbh_clk;
+ }
+
+ hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
+ if (!hcd) {
+ retval = -ENOMEM;
+ goto fail_create_hcd;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ retval = -ENODEV;
+ goto fail_request_resource;
+ }
+
+ hcd->rsrc_start = res->start;
+ hcd->rsrc_len = resource_size(res);
+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
+ driver->description)) {
+ retval = -EBUSY;
+ goto fail_request_resource;
+ }
+
+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+ if (hcd->regs == NULL) {
+ dev_dbg(&pdev->dev, "error mapping memory\n");
+ retval = -ENOMEM;
+ goto fail_ioremap;
+ }
+
+ ehci = (struct spear_ehci *)hcd_to_ehci(hcd);
+ ehci->clk = usbh_clk;
+
+ spear_start_ehci(ehci);
+ retval = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED);
+ if (retval)
+ goto fail_add_hcd;
+
+ return retval;
+
+fail_add_hcd:
+ spear_stop_ehci(ehci);
+ iounmap(hcd->regs);
+fail_ioremap:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+fail_request_resource:
+ usb_put_hcd(hcd);
+fail_create_hcd:
+ clk_put(usbh_clk);
+fail_get_usbh_clk:
+fail_irq_get:
+ dev_err(&pdev->dev, "init fail, %d\n", retval);
+
+ return retval ;
+}
+
+static int spear_ehci_hcd_drv_remove(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+ struct spear_ehci *ehci_p = to_spear_ehci(hcd);
+
+ if (!hcd)
+ return 0;
+ if (in_interrupt())
+ BUG();
+ usb_remove_hcd(hcd);
+
+ if (ehci_p->clk)
+ spear_stop_ehci(ehci_p);
+ iounmap(hcd->regs);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ usb_put_hcd(hcd);
+
+ if (ehci_p->clk)
+ clk_put(ehci_p->clk);
+
+ return 0;
+}
+
+static struct platform_driver spear_ehci_hcd_driver = {
+ .probe = spear_ehci_hcd_drv_probe,
+ .remove = spear_ehci_hcd_drv_remove,
+ .shutdown = usb_hcd_platform_shutdown,
+ .driver = {
+ .name = "spear-ehci",
+ .bus = &platform_bus_type
+ }
+};
+
+MODULE_ALIAS("platform:spear-ehci");
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index c3b4ccc..8104fd3 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1075,6 +1075,11 @@ MODULE_LICENSE ("GPL");
#define OF_PLATFORM_DRIVER ohci_hcd_ppc_of_driver
#endif
+#ifdef CONFIG_PLAT_SPEAR
+#include "ohci-spear.c"
+#define PLATFORM_DRIVER spear_ohci_hcd_driver
+#endif
+
#ifdef CONFIG_PPC_PS3
#include "ohci-ps3.c"
#define PS3_SYSTEM_BUS_DRIVER ps3_ohci_driver
diff --git a/drivers/usb/host/ohci-spear.c b/drivers/usb/host/ohci-spear.c
new file mode 100644
index 0000000..4fd4bea
--- /dev/null
+++ b/drivers/usb/host/ohci-spear.c
@@ -0,0 +1,240 @@
+/*
+* OHCI HCD (Host Controller Driver) for USB.
+*
+* Copyright (C) 2010 ST Microelectronics.
+* Deepak Sikri<deepak.sikri at st.com>
+*
+* Based on various ohci-*.c drivers
+*
+* This file is licensed under the terms of the GNU General Public
+* License version 2. This program is licensed "as is" without any
+* warranty of any kind, whether express or implied.
+*/
+
+#include <linux/signal.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+
+struct spear_ohci {
+ struct ohci_hcd ohci;
+ struct clk *clk;
+};
+
+#define to_spear_ohci(hcd) (struct spear_ohci *)hcd_to_ohci(hcd)
+
+static void spear_start_ohci(struct spear_ohci *ohci)
+{
+ clk_enable(ohci->clk);
+}
+
+static void spear_stop_ohci(struct spear_ohci *ohci)
+{
+ clk_disable(ohci->clk);
+}
+
+static int __devinit ohci_spear_start(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int ret;
+
+ ret = ohci_init(ohci);
+ if (ret < 0)
+ return ret;
+ ohci->regs = hcd->regs;
+
+ ret = ohci_run(ohci);
+ if (ret < 0) {
+ dev_err(hcd->self.controller, "can't start\n");
+ ohci_stop(hcd);
+ return ret;
+ }
+
+ create_debug_files(ohci);
+
+#ifdef DEBUG
+ ohci_dump(ohci, 1);
+#endif
+ return 0;
+}
+
+static const struct hc_driver ohci_spear_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "SPEAr OHCI",
+ .hcd_priv_size = sizeof(struct spear_ohci),
+
+ /* generic hardware linkage */
+ .irq = ohci_irq,
+ .flags = HCD_USB11 | HCD_MEMORY,
+
+ /* basic lifecycle operations */
+ .start = ohci_spear_start,
+ .stop = ohci_stop,
+ .shutdown = ohci_shutdown,
+#ifdef CONFIG_PM
+ .bus_suspend = ohci_bus_suspend,
+ .bus_resume = ohci_bus_resume,
+#endif
+
+ /* managing i/o requests and associated device resources */
+ .urb_enqueue = ohci_urb_enqueue,
+ .urb_dequeue = ohci_urb_dequeue,
+ .endpoint_disable = ohci_endpoint_disable,
+
+ /* scheduling support */
+ .get_frame_number = ohci_get_frame,
+
+ /* root hub support */
+ .hub_status_data = ohci_hub_status_data,
+ .hub_control = ohci_hub_control,
+
+ .start_port_reset = ohci_start_port_reset,
+};
+
+static int spear_ohci_hcd_drv_probe(struct platform_device *pdev)
+{
+ const struct hc_driver *driver = &ohci_spear_hc_driver;
+ struct usb_hcd *hcd = NULL;
+ struct clk *usbh_clk;
+ struct spear_ohci *ohci_p;
+ struct resource *res;
+ int retval, irq;
+ int *pdata = pdev->dev.platform_data;
+ char clk_name[20] = "usbh_clk";
+
+ if (pdata == NULL)
+ return -EFAULT;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ retval = irq;
+ goto fail_irq_get;
+ }
+
+ if (*pdata >= 0)
+ sprintf(clk_name, "usbh.%01d_clk", *pdata);
+
+ usbh_clk = clk_get(NULL, clk_name);
+ if (IS_ERR(usbh_clk)) {
+ dev_err(&pdev->dev, "Error getting interface clock\n");
+ retval = PTR_ERR(usbh_clk);
+ goto fail_get_usbh_clk;
+ }
+
+ hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
+ if (!hcd) {
+ retval = -ENOMEM;
+ goto fail_create_hcd;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ retval = -ENODEV;
+ goto fail_request_resource;
+ }
+
+ hcd->rsrc_start = pdev->resource[0].start;
+ hcd->rsrc_len = resource_size(res);
+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+ dev_dbg(&pdev->dev, "request_mem_region failed\n");
+ retval = -EBUSY;
+ goto fail_request_resource;
+ }
+
+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+ if (!hcd->regs) {
+ dev_dbg(&pdev->dev, "ioremap failed\n");
+ retval = -ENOMEM;
+ goto fail_ioremap;
+ }
+
+ ohci_p = (struct spear_ohci *)hcd_to_ohci(hcd);
+ ohci_p->clk = usbh_clk;
+ spear_start_ohci(ohci_p);
+ ohci_hcd_init(hcd_to_ohci(hcd));
+
+ retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), IRQF_DISABLED);
+ if (retval == 0)
+ return retval;
+
+ spear_stop_ohci(ohci_p);
+ iounmap(hcd->regs);
+fail_ioremap:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+fail_request_resource:
+ usb_put_hcd(hcd);
+fail_create_hcd:
+ clk_put(usbh_clk);
+fail_get_usbh_clk:
+fail_irq_get:
+ dev_err(&pdev->dev, "init fail, %d\n", retval);
+
+ return retval;
+}
+
+static int spear_ohci_hcd_drv_remove(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+ struct spear_ohci *ohci_p = to_spear_ohci(hcd);
+
+ usb_remove_hcd(hcd);
+ if (ohci_p->clk)
+ spear_stop_ohci(ohci_p);
+
+ iounmap(hcd->regs);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ usb_put_hcd(hcd);
+
+ if (ohci_p->clk)
+ clk_put(ohci_p->clk);
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+#if defined(CONFIG_PM)
+static int spear_ohci_hcd_drv_suspend(struct platform_device *dev,
+ pm_message_t message)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ struct spear_ohci *ohci_p = to_spear_ohci(hcd);
+
+ if (time_before(jiffies, ohci->next_statechange))
+ msleep(5);
+ ohci->next_statechange = jiffies;
+
+ spear_stop_ohci(ohci_p);
+ ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
+ return 0;
+}
+
+static int spear_ohci_hcd_drv_resume(struct platform_device *dev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ struct spear_ohci *ohci_p = to_spear_ohci(hcd);
+
+ if (time_before(jiffies, ohci->next_statechange))
+ msleep(5);
+ ohci->next_statechange = jiffies;
+
+ spear_start_ohci(ohci_p);
+ ohci_finish_controller_resume(hcd);
+ return 0;
+}
+#endif
+
+/* Driver definition to register with the platform bus */
+static struct platform_driver spear_ohci_hcd_driver = {
+ .probe = spear_ohci_hcd_drv_probe,
+ .remove = spear_ohci_hcd_drv_remove,
+#ifdef CONFIG_PM
+ .suspend = spear_ohci_hcd_drv_suspend,
+ .resume = spear_ohci_hcd_drv_resume,
+#endif
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "spear-ohci",
+ },
+};
+
+MODULE_ALIAS("platform:spear-ohci");
--
1.7.2.2
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