These patches are for separating the SOC On-Chip ohci host controller from ohci-hcd host code into its own driver module. This work is part of enabling multi-platform kernels on ARM; it would be nice to have in 3.11.
V2: In patch 5/6 and 6/6: -Set non-standard fields in hc_driver manually, rather than relying on an expanded struct ohci_driver_overrides. -Save orig_ohci_hub_control and orig_ohci_hub_status_data rather than relying on ohci_hub_control and hub_status_data being exported.
In patch 1/6 to 4/6 -ohci_setup() has been removed because it is called in .reset member of the ohci_hc_driver structure.
V3: In patch 5/6 and 6/6: -ohci_setup() has been removed because it is called in .reset member of the ohci_hc_driver structure.
In patch 5/6: -The ohci_restart() function is not required in current scenario, only discarding connection state of integrated transceivers is sufficient, for this directly handling ohci->hc_control.
In patch 2/6 : -rewritten if (config->otg || config->rwc) block statements into two separate 'if blocks' to handle below scenarios 1. config->otg set scenario. 2. if any of these (config->otg, config->rwc) are set, this scenario should be handled only after ohci_setup()
In patch 1/6 and 4/6: No change.
Manjunath Goudar (6): USB: OHCI: make ohci-exynos a separate driver USB: OHCI: make ohci-omap a separate driver USB: OHCI: make ohci-omap3 a separate driver USB: OHCI: make ohci-spear a separate driver USB: OHCI: make ohci-at91 a separate driver USB: OHCI: make ohci-s3c2410 a separate driver
drivers/usb/host/Kconfig | 30 ++++++- drivers/usb/host/Makefile | 6 ++ drivers/usb/host/ohci-at91.c | 151 ++++++++++++++++------------------- drivers/usb/host/ohci-exynos.c | 167 ++++++++++++++++----------------------- drivers/usb/host/ohci-hcd.c | 108 ------------------------- drivers/usb/host/ohci-omap.c | 157 +++++++++++++----------------------- drivers/usb/host/ohci-omap3.c | 113 ++++++++------------------ drivers/usb/host/ohci-s3c2410.c | 128 +++++++++++++----------------- drivers/usb/host/ohci-spear.c | 140 +++++++++++++------------------- 9 files changed, 369 insertions(+), 631 deletions(-)
Separate the Samsung OHCI EXYNOS host controller driver from ohci-hcd host code so that it can be built as a separate driver module. This work is part of enabling multi-platform kernels on ARM; it would be nice to have in 3.11.
Signed-off-by: Manjunath Goudar manjunath.goudar@linaro.org Acked-by: Alan Stern stern@rowland.harvard.edu Acked-by: Jingoo Han jg1.han@samsung.com Cc: Vivek Gautam gautam.vivek@samsung.com Cc: Arnd Bergmann arnd@arndb.de Cc: Kukjin Kim kgene.kim@samsung.com Cc: Greg KH greg@kroah.com Cc: linux-usb@vger.kernel.org
V2: -exynos_ohci_hcd structure assignment error fixed. -Removed multiple usb_create_hcd() from prob funtion. -platform_set_drvdata() called before exynos_ohci_phy_enable(). -ohci_setup() removed because it is called in .reset member of the ohci_hc_driver structure
V3: -No major changes only "exynos" written in capital letters in "OHCI exynos driver". --- drivers/usb/host/Kconfig | 2 +- drivers/usb/host/Makefile | 1 + drivers/usb/host/ohci-exynos.c | 167 +++++++++++++++++----------------------- drivers/usb/host/ohci-hcd.c | 18 ----- 4 files changed, 71 insertions(+), 117 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index f35f71e..75456f2 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -463,7 +463,7 @@ config USB_OHCI_SH If you use the PCI OHCI controller, this option is not necessary.
config USB_OHCI_EXYNOS - boolean "OHCI support for Samsung EXYNOS SoC Series" + tristate "OHCI support for Samsung EXYNOS SoC Series" depends on ARCH_EXYNOS help Enable support for the Samsung Exynos SOC's on-chip OHCI controller. diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index d1a34e0..bf4a4b2 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -45,6 +45,7 @@ obj-$(CONFIG_USB_ISP1362_HCD) += isp1362-hcd.o obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o obj-$(CONFIG_USB_OHCI_HCD_PCI) += ohci-pci.o obj-$(CONFIG_USB_OHCI_HCD_PLATFORM) += ohci-platform.o +obj-$(CONFIG_USB_OHCI_EXYNOS) += ohci-exynos.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o obj-$(CONFIG_USB_FHCI_HCD) += fhci.o diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c index b0b542c..ae6068d 100644 --- a/drivers/usb/host/ohci-exynos.c +++ b/drivers/usb/host/ohci-exynos.c @@ -12,24 +12,39 @@ */
#include <linux/clk.h> +#include <linux/dma-mapping.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/platform_data/usb-ohci-exynos.h> #include <linux/usb/phy.h> #include <linux/usb/samsung_usb_phy.h> +#include <linux/usb.h> +#include <linux/usb/hcd.h> +#include <linux/usb/otg.h> + +#include "ohci.h" + +#define DRIVER_DESC "OHCI EXYNOS driver" + +static const char hcd_name[] = "ohci-exynos"; +static struct hc_driver __read_mostly exynos_ohci_hc_driver; + +#define to_exynos_ohci(hcd) (struct exynos_ohci_hcd *)(hcd_to_ohci(hcd)->priv)
struct exynos_ohci_hcd { - struct device *dev; - struct usb_hcd *hcd; struct clk *clk; struct usb_phy *phy; struct usb_otg *otg; struct exynos4_ohci_platdata *pdata; };
-static void exynos_ohci_phy_enable(struct exynos_ohci_hcd *exynos_ohci) +static void exynos_ohci_phy_enable(struct platform_device *pdev) { - struct platform_device *pdev = to_platform_device(exynos_ohci->dev); + struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
if (exynos_ohci->phy) usb_phy_init(exynos_ohci->phy); @@ -37,9 +52,10 @@ static void exynos_ohci_phy_enable(struct exynos_ohci_hcd *exynos_ohci) exynos_ohci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST); }
-static void exynos_ohci_phy_disable(struct exynos_ohci_hcd *exynos_ohci) +static void exynos_ohci_phy_disable(struct platform_device *pdev) { - struct platform_device *pdev = to_platform_device(exynos_ohci->dev); + struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
if (exynos_ohci->phy) usb_phy_shutdown(exynos_ohci->phy); @@ -47,63 +63,11 @@ static void exynos_ohci_phy_disable(struct exynos_ohci_hcd *exynos_ohci) exynos_ohci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST); }
-static int ohci_exynos_reset(struct usb_hcd *hcd) -{ - return ohci_init(hcd_to_ohci(hcd)); -} - -static int ohci_exynos_start(struct usb_hcd *hcd) -{ - struct ohci_hcd *ohci = hcd_to_ohci(hcd); - int ret; - - ohci_dbg(ohci, "ohci_exynos_start, ohci:%p", ohci); - - ret = ohci_run(ohci); - if (ret < 0) { - dev_err(hcd->self.controller, "can't start %s\n", - hcd->self.bus_name); - ohci_stop(hcd); - return ret; - } - - return 0; -} - -static const struct hc_driver exynos_ohci_hc_driver = { - .description = hcd_name, - .product_desc = "EXYNOS OHCI Host Controller", - .hcd_priv_size = sizeof(struct ohci_hcd), - - .irq = ohci_irq, - .flags = HCD_MEMORY|HCD_USB11, - - .reset = ohci_exynos_reset, - .start = ohci_exynos_start, - .stop = ohci_stop, - .shutdown = ohci_shutdown, - - .get_frame_number = ohci_get_frame, - - .urb_enqueue = ohci_urb_enqueue, - .urb_dequeue = ohci_urb_dequeue, - .endpoint_disable = ohci_endpoint_disable, - - .hub_status_data = ohci_hub_status_data, - .hub_control = ohci_hub_control, -#ifdef CONFIG_PM - .bus_suspend = ohci_bus_suspend, - .bus_resume = ohci_bus_resume, -#endif - .start_port_reset = ohci_start_port_reset, -}; - static int exynos_ohci_probe(struct platform_device *pdev) { struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data; struct exynos_ohci_hcd *exynos_ohci; struct usb_hcd *hcd; - struct ohci_hcd *ohci; struct resource *res; struct usb_phy *phy; int irq; @@ -119,10 +83,14 @@ static int exynos_ohci_probe(struct platform_device *pdev) if (!pdev->dev.coherent_dma_mask) pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
- exynos_ohci = devm_kzalloc(&pdev->dev, sizeof(struct exynos_ohci_hcd), - GFP_KERNEL); - if (!exynos_ohci) + hcd = usb_create_hcd(&exynos_ohci_hc_driver, + &pdev->dev, dev_name(&pdev->dev)); + if (!hcd) { + dev_err(&pdev->dev, "Unable to create HCD\n"); return -ENOMEM; + } + + exynos_ohci = to_exynos_ohci(hcd);
if (of_device_is_compatible(pdev->dev.of_node, "samsung,exynos5440-ohci")) @@ -143,17 +111,6 @@ static int exynos_ohci_probe(struct platform_device *pdev) }
skip_phy: - - exynos_ohci->dev = &pdev->dev; - - hcd = usb_create_hcd(&exynos_ohci_hc_driver, &pdev->dev, - dev_name(&pdev->dev)); - if (!hcd) { - dev_err(&pdev->dev, "Unable to create HCD\n"); - return -ENOMEM; - } - - exynos_ohci->hcd = hcd; exynos_ohci->clk = devm_clk_get(&pdev->dev, "usbhost");
if (IS_ERR(exynos_ohci->clk)) { @@ -190,26 +147,21 @@ skip_phy: }
if (exynos_ohci->otg) - exynos_ohci->otg->set_host(exynos_ohci->otg, - &exynos_ohci->hcd->self); + exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
- exynos_ohci_phy_enable(exynos_ohci); + platform_set_drvdata(pdev, hcd);
- ohci = hcd_to_ohci(hcd); - ohci_hcd_init(ohci); + exynos_ohci_phy_enable(pdev);
err = usb_add_hcd(hcd, irq, IRQF_SHARED); if (err) { dev_err(&pdev->dev, "Failed to add USB HCD\n"); goto fail_add_hcd; } - - platform_set_drvdata(pdev, exynos_ohci); - return 0;
fail_add_hcd: - exynos_ohci_phy_disable(exynos_ohci); + exynos_ohci_phy_disable(pdev); fail_io: clk_disable_unprepare(exynos_ohci->clk); fail_clk: @@ -219,16 +171,15 @@ fail_clk:
static int exynos_ohci_remove(struct platform_device *pdev) { - struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev); - struct usb_hcd *hcd = exynos_ohci->hcd; + struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
usb_remove_hcd(hcd);
if (exynos_ohci->otg) - exynos_ohci->otg->set_host(exynos_ohci->otg, - &exynos_ohci->hcd->self); + exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
- exynos_ohci_phy_disable(exynos_ohci); + exynos_ohci_phy_disable(pdev);
clk_disable_unprepare(exynos_ohci->clk);
@@ -239,8 +190,7 @@ static int exynos_ohci_remove(struct platform_device *pdev)
static void exynos_ohci_shutdown(struct platform_device *pdev) { - struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev); - struct usb_hcd *hcd = exynos_ohci->hcd; + struct usb_hcd *hcd = platform_get_drvdata(pdev);
if (hcd->driver->shutdown) hcd->driver->shutdown(hcd); @@ -249,9 +199,10 @@ static void exynos_ohci_shutdown(struct platform_device *pdev) #ifdef CONFIG_PM static int exynos_ohci_suspend(struct device *dev) { - struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev); - struct usb_hcd *hcd = exynos_ohci->hcd; + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd); struct ohci_hcd *ohci = hcd_to_ohci(hcd); + struct platform_device *pdev = to_platform_device(dev); unsigned long flags; int rc = 0;
@@ -271,10 +222,9 @@ static int exynos_ohci_suspend(struct device *dev) clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
if (exynos_ohci->otg) - exynos_ohci->otg->set_host(exynos_ohci->otg, - &exynos_ohci->hcd->self); + exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
- exynos_ohci_phy_disable(exynos_ohci); + exynos_ohci_phy_disable(pdev);
clk_disable_unprepare(exynos_ohci->clk);
@@ -286,16 +236,16 @@ fail:
static int exynos_ohci_resume(struct device *dev) { - struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev); - struct usb_hcd *hcd = exynos_ohci->hcd; + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd); + struct platform_device *pdev = to_platform_device(dev);
clk_prepare_enable(exynos_ohci->clk);
if (exynos_ohci->otg) - exynos_ohci->otg->set_host(exynos_ohci->otg, - &exynos_ohci->hcd->self); + exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
- exynos_ohci_phy_enable(exynos_ohci); + exynos_ohci_phy_enable(pdev);
ohci_resume(hcd, false);
@@ -306,6 +256,10 @@ static int exynos_ohci_resume(struct device *dev) #define exynos_ohci_resume NULL #endif
+static const struct ohci_driver_overrides exynos_overrides __initconst = { + .extra_priv_size = sizeof(struct exynos_ohci_hcd), +}; + static const struct dev_pm_ops exynos_ohci_pm_ops = { .suspend = exynos_ohci_suspend, .resume = exynos_ohci_resume, @@ -331,6 +285,23 @@ static struct platform_driver exynos_ohci_driver = { .of_match_table = of_match_ptr(exynos_ohci_match), } }; +static int __init ohci_exynos_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + ohci_init_driver(&exynos_ohci_hc_driver, &exynos_overrides); + return platform_driver_register(&exynos_ohci_driver); +} +module_init(ohci_exynos_init); + +static void __exit ohci_exynos_cleanup(void) +{ + platform_driver_unregister(&exynos_ohci_driver); +} +module_exit(ohci_exynos_cleanup);
MODULE_ALIAS("platform:exynos-ohci"); MODULE_AUTHOR("Jingoo Han jg1.han@samsung.com"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index a9d3437..2980bb6 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1182,11 +1182,6 @@ MODULE_LICENSE ("GPL"); #define S3C2410_PLATFORM_DRIVER ohci_hcd_s3c2410_driver #endif
-#ifdef CONFIG_USB_OHCI_EXYNOS -#include "ohci-exynos.c" -#define EXYNOS_PLATFORM_DRIVER exynos_ohci_driver -#endif - #ifdef CONFIG_USB_OHCI_HCD_OMAP1 #include "ohci-omap.c" #define OMAP1_PLATFORM_DRIVER ohci_hcd_omap_driver @@ -1336,12 +1331,6 @@ static int __init ohci_hcd_mod_init(void) goto error_s3c2410; #endif
-#ifdef EXYNOS_PLATFORM_DRIVER - retval = platform_driver_register(&EXYNOS_PLATFORM_DRIVER); - if (retval < 0) - goto error_exynos; -#endif - #ifdef EP93XX_PLATFORM_DRIVER retval = platform_driver_register(&EP93XX_PLATFORM_DRIVER); if (retval < 0) @@ -1395,10 +1384,6 @@ static int __init ohci_hcd_mod_init(void) platform_driver_unregister(&EP93XX_PLATFORM_DRIVER); error_ep93xx: #endif -#ifdef EXYNOS_PLATFORM_DRIVER - platform_driver_unregister(&EXYNOS_PLATFORM_DRIVER); - error_exynos: -#endif #ifdef S3C2410_PLATFORM_DRIVER platform_driver_unregister(&S3C2410_PLATFORM_DRIVER); error_s3c2410: @@ -1463,9 +1448,6 @@ static void __exit ohci_hcd_mod_exit(void) #ifdef EP93XX_PLATFORM_DRIVER platform_driver_unregister(&EP93XX_PLATFORM_DRIVER); #endif -#ifdef EXYNOS_PLATFORM_DRIVER - platform_driver_unregister(&EXYNOS_PLATFORM_DRIVER); -#endif #ifdef S3C2410_PLATFORM_DRIVER platform_driver_unregister(&S3C2410_PLATFORM_DRIVER); #endif
Separate the TI OHCI OMAP1/2 host controller driver from ohci-hcd host code so that it can be built as a separate driver module. This work is part of enabling multi-platform kernels on ARM; it would be nice to have in 3.11.
Signed-off-by: Manjunath Goudar manjunath.goudar@linaro.org Cc: Felipe Balbi balbi@ti.com Cc: Arnd Bergmann arnd@arndb.de Cc: Greg KH greg@kroah.com Cc: Alan Stern stern@rowland.harvard.edu Cc: linux-usb@vger.kernel.org
V2: -omap_ohci_clock_power(0) called in usb_hcd_omap_remove(). -Removed ohci_setup() call from usb_hcd_omap_probe(). -host_enabled and host_initialized variables aren't used for anything thats what removed.
V3: -rewritten if (config->otg || config->rwc) block statements into two separate 'if blocks' to handle below scenarios 1. config->otg set scenario. 2. if any of these (config->otg, config->rwc) are set, this scenario should be handled only after ohci_setup() --- drivers/usb/host/Kconfig | 2 +- drivers/usb/host/Makefile | 1 + drivers/usb/host/ohci-hcd.c | 18 ----- drivers/usb/host/ohci-omap.c | 157 +++++++++++++++--------------------------- 4 files changed, 56 insertions(+), 122 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 75456f2..7a87c72 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -376,7 +376,7 @@ config USB_OHCI_HCD if USB_OHCI_HCD
config USB_OHCI_HCD_OMAP1 - bool "OHCI support for OMAP1/2 chips" + tristate "OHCI support for OMAP1/2 chips" depends on ARCH_OMAP1 default y ---help--- diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index bf4a4b2..52f2c44 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -46,6 +46,7 @@ obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o obj-$(CONFIG_USB_OHCI_HCD_PCI) += ohci-pci.o obj-$(CONFIG_USB_OHCI_HCD_PLATFORM) += ohci-platform.o obj-$(CONFIG_USB_OHCI_EXYNOS) += ohci-exynos.o +obj-$(CONFIG_USB_OHCI_HCD_OMAP1) += ohci-omap.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o obj-$(CONFIG_USB_FHCI_HCD) += fhci.o diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index 2980bb6..1abc1e7 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1182,11 +1182,6 @@ MODULE_LICENSE ("GPL"); #define S3C2410_PLATFORM_DRIVER ohci_hcd_s3c2410_driver #endif
-#ifdef CONFIG_USB_OHCI_HCD_OMAP1 -#include "ohci-omap.c" -#define OMAP1_PLATFORM_DRIVER ohci_hcd_omap_driver -#endif - #ifdef CONFIG_USB_OHCI_HCD_OMAP3 #include "ohci-omap3.c" #define OMAP3_PLATFORM_DRIVER ohci_hcd_omap3_driver @@ -1289,12 +1284,6 @@ static int __init ohci_hcd_mod_init(void) goto error_platform; #endif
-#ifdef OMAP1_PLATFORM_DRIVER - retval = platform_driver_register(&OMAP1_PLATFORM_DRIVER); - if (retval < 0) - goto error_omap1_platform; -#endif - #ifdef OMAP3_PLATFORM_DRIVER retval = platform_driver_register(&OMAP3_PLATFORM_DRIVER); if (retval < 0) @@ -1408,10 +1397,6 @@ static int __init ohci_hcd_mod_init(void) platform_driver_unregister(&OMAP3_PLATFORM_DRIVER); error_omap3_platform: #endif -#ifdef OMAP1_PLATFORM_DRIVER - platform_driver_unregister(&OMAP1_PLATFORM_DRIVER); - error_omap1_platform: -#endif #ifdef PLATFORM_DRIVER platform_driver_unregister(&PLATFORM_DRIVER); error_platform: @@ -1466,9 +1451,6 @@ static void __exit ohci_hcd_mod_exit(void) #ifdef OMAP3_PLATFORM_DRIVER platform_driver_unregister(&OMAP3_PLATFORM_DRIVER); #endif -#ifdef OMAP1_PLATFORM_DRIVER - platform_driver_unregister(&OMAP1_PLATFORM_DRIVER); -#endif #ifdef PLATFORM_DRIVER platform_driver_unregister(&PLATFORM_DRIVER); #endif diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c index 8747fa6..10ba58d 100644 --- a/drivers/usb/host/ohci-omap.c +++ b/drivers/usb/host/ohci-omap.c @@ -14,12 +14,21 @@ * This file is licenced under the GPL. */
-#include <linux/signal.h> -#include <linux/jiffies.h> -#include <linux/platform_device.h> #include <linux/clk.h> +#include <linux/dma-mapping.h> #include <linux/err.h> #include <linux/gpio.h> +#include <linux/io.h> +#include <linux/jiffies.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/usb/otg.h> +#include <linux/platform_device.h> +#include <linux/signal.h> +#include <linux/usb.h> +#include <linux/usb/hcd.h> + +#include "ohci.h"
#include <asm/io.h> #include <asm/mach-types.h> @@ -42,10 +51,7 @@ #define OMAP1510_LB_MMU_RAM_H 0xfffec234 #define OMAP1510_LB_MMU_RAM_L 0xfffec238
- -#ifndef CONFIG_ARCH_OMAP -#error "This file is OMAP bus glue. CONFIG_OMAP must be defined." -#endif +#define DRIVER_DESC "OHCI OMAP driver"
#ifdef CONFIG_TPS65010 #include <linux/i2c/tps65010.h> @@ -68,8 +74,9 @@ extern int ocpi_enable(void);
static struct clk *usb_host_ck; static struct clk *usb_dc_ck; -static int host_enabled; -static int host_initialized; + +static const char hcd_name[] = "ohci-omap"; +static struct hc_driver __read_mostly ohci_omap_hc_driver;
static void omap_ohci_clock_power(int on) { @@ -188,7 +195,7 @@ static void start_hnp(struct ohci_hcd *ohci)
/*-------------------------------------------------------------------------*/
-static int ohci_omap_init(struct usb_hcd *hcd) +static int ohci_omap_reset(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci(hcd); struct omap_usb_config *config = hcd->self.controller->platform_data; @@ -198,9 +205,9 @@ static int ohci_omap_init(struct usb_hcd *hcd) dev_dbg(hcd->self.controller, "starting USB Controller\n");
if (config->otg) { - ohci_to_hcd(ohci)->self.otg_port = config->otg; + hcd->self.otg_port = config->otg; /* default/minimum OTG power budget: 8 mA */ - ohci_to_hcd(ohci)->power_budget = 8; + hcd->power_budget = 8; }
/* boards can use OTG transceivers in non-OTG modes */ @@ -238,9 +245,15 @@ static int ohci_omap_init(struct usb_hcd *hcd) omap_1510_local_bus_init(); }
- if ((ret = ohci_init(ohci)) < 0) + ret = ohci_setup(hcd); + if (ret < 0) return ret;
+ if (config->otg || config->rwc) { + ohci->hc_control = OHCI_CTRL_RWC; + writel(OHCI_CTRL_RWC, &ohci->regs->control); + } + /* board-specific power switching and overcurrent support */ if (machine_is_omap_osk() || machine_is_omap_innovator()) { u32 rh = roothub_a (ohci); @@ -281,14 +294,6 @@ static int ohci_omap_init(struct usb_hcd *hcd) return 0; }
-static void ohci_omap_stop(struct usb_hcd *hcd) -{ - dev_dbg(hcd->self.controller, "stopping USB Controller\n"); - ohci_stop(hcd); - omap_ohci_clock_power(0); -} - - /*-------------------------------------------------------------------------*/
/** @@ -304,7 +309,6 @@ static int usb_hcd_omap_probe (const struct hc_driver *driver, { int retval, irq; struct usb_hcd *hcd = 0; - struct ohci_hcd *ohci;
if (pdev->num_resources != 2) { printk(KERN_ERR "hcd probe: invalid num_resources: %i\n", @@ -354,12 +358,6 @@ static int usb_hcd_omap_probe (const struct hc_driver *driver, goto err2; }
- ohci = hcd_to_ohci(hcd); - ohci_hcd_init(ohci); - - host_initialized = 0; - host_enabled = 1; - irq = platform_get_irq(pdev, 0); if (irq < 0) { retval = -ENXIO; @@ -369,11 +367,7 @@ static int usb_hcd_omap_probe (const struct hc_driver *driver, if (retval) goto err3;
- host_initialized = 1; - - if (!host_enabled) - omap_ohci_clock_power(0); - + omap_ohci_clock_power(0); return 0; err3: iounmap(hcd->regs); @@ -402,6 +396,8 @@ err0: static inline void usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev) { + dev_dbg(hcd->self.controller, "stopping USB Controller\n"); + omap_ohci_clock_power(0); usb_remove_hcd(hcd); if (!IS_ERR_OR_NULL(hcd->phy)) { (void) otg_set_host(hcd->phy->otg, 0); @@ -418,76 +414,6 @@ usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
/*-------------------------------------------------------------------------*/
-static int -ohci_omap_start (struct usb_hcd *hcd) -{ - struct omap_usb_config *config; - struct ohci_hcd *ohci = hcd_to_ohci (hcd); - int ret; - - if (!host_enabled) - return 0; - config = hcd->self.controller->platform_data; - if (config->otg || config->rwc) { - ohci->hc_control = OHCI_CTRL_RWC; - writel(OHCI_CTRL_RWC, &ohci->regs->control); - } - - if ((ret = ohci_run (ohci)) < 0) { - dev_err(hcd->self.controller, "can't start\n"); - ohci_stop (hcd); - return ret; - } - return 0; -} - -/*-------------------------------------------------------------------------*/ - -static const struct hc_driver ohci_omap_hc_driver = { - .description = hcd_name, - .product_desc = "OMAP OHCI", - .hcd_priv_size = sizeof(struct ohci_hcd), - - /* - * generic hardware linkage - */ - .irq = ohci_irq, - .flags = HCD_USB11 | HCD_MEMORY, - - /* - * basic lifecycle operations - */ - .reset = ohci_omap_init, - .start = ohci_omap_start, - .stop = ohci_omap_stop, - .shutdown = ohci_shutdown, - - /* - * 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, -#ifdef CONFIG_PM - .bus_suspend = ohci_bus_suspend, - .bus_resume = ohci_bus_resume, -#endif - .start_port_reset = ohci_start_port_reset, -}; - -/*-------------------------------------------------------------------------*/ - static int ohci_hcd_omap_drv_probe(struct platform_device *dev) { return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev); @@ -553,4 +479,29 @@ static struct platform_driver ohci_hcd_omap_driver = { }, };
+static const struct ohci_driver_overrides omap_overrides __initconst = { + .product_desc = "OMAP OHCI", + .reset = ohci_omap_reset +}; + +static int __init ohci_omap_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + + ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides); + return platform_driver_register(&ohci_hcd_omap_driver); +} +module_init(ohci_omap_init); + +static void __exit ohci_omap_cleanup(void) +{ + platform_driver_unregister(&ohci_hcd_omap_driver); +} +module_exit(ohci_omap_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); MODULE_ALIAS("platform:ohci"); +MODULE_LICENSE("GPL");
On Tue, 25 Jun 2013, Manjunath Goudar wrote:
Separate the TI OHCI OMAP1/2 host controller driver from ohci-hcd host code so that it can be built as a separate driver module. This work is part of enabling multi-platform kernels on ARM; it would be nice to have in 3.11.
I'm sorry it took so long to review this; I have been very busy.
This patch is almost right. There are just a couple of problems involving the clock_power calls.
@@ -354,12 +358,6 @@ static int usb_hcd_omap_probe (const struct hc_driver *driver, goto err2; }
- ohci = hcd_to_ohci(hcd);
- ohci_hcd_init(ohci);
- host_initialized = 0;
- host_enabled = 1;
- irq = platform_get_irq(pdev, 0); if (irq < 0) { retval = -ENXIO;
@@ -369,11 +367,7 @@ static int usb_hcd_omap_probe (const struct hc_driver *driver, if (retval) goto err3;
- host_initialized = 1;
- if (!host_enabled)
omap_ohci_clock_power(0);
- omap_ohci_clock_power(0);
Since host_enabled was always 1 at this point, omap_ohci_clock_power() would never be called. You should remove it.
@@ -402,6 +396,8 @@ err0: static inline void usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev) {
- dev_dbg(hcd->self.controller, "stopping USB Controller\n");
- omap_ohci_clock_power(0); usb_remove_hcd(hcd); if (!IS_ERR_OR_NULL(hcd->phy)) { (void) otg_set_host(hcd->phy->otg, 0);
omap_ohci_clock_power() should be called after usb_remove_hcd(), not before. This reason is simple: Until usb_remove_hcd() is called, the controller is still running and therefore needs to have a valid clock signal.
Alan Stern
On 18 July 2013 21:20, Alan Stern stern@rowland.harvard.edu wrote:
On Tue, 25 Jun 2013, Manjunath Goudar wrote:
Separate the TI OHCI OMAP1/2 host controller driver from ohci-hcd host code so that it can be built as a separate driver module. This work is part of enabling multi-platform kernels on ARM; it would be nice to have in 3.11.
I'm sorry it took so long to review this; I have been very busy.
This patch is almost right. There are just a couple of problems involving the clock_power calls.
It's ok. Thank you very much for your valuable comments. These issue I will fix in next version of this series.
@@ -354,12 +358,6 @@ static int usb_hcd_omap_probe (const struct
hc_driver *driver,
goto err2; }
ohci = hcd_to_ohci(hcd);ohci_hcd_init(ohci);host_initialized = 0;host_enabled = 1;irq = platform_get_irq(pdev, 0); if (irq < 0) { retval = -ENXIO;@@ -369,11 +367,7 @@ static int usb_hcd_omap_probe (const struct
hc_driver *driver,
if (retval) goto err3;
host_initialized = 1;if (!host_enabled)omap_ohci_clock_power(0);
omap_ohci_clock_power(0);Since host_enabled was always 1 at this point, omap_ohci_clock_power() would never be called. You should remove it.
@@ -402,6 +396,8 @@ err0: static inline void usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev) {
dev_dbg(hcd->self.controller, "stopping USB Controller\n");omap_ohci_clock_power(0); usb_remove_hcd(hcd); if (!IS_ERR_OR_NULL(hcd->phy)) { (void) otg_set_host(hcd->phy->otg, 0);omap_ohci_clock_power() should be called after usb_remove_hcd(), not before. This reason is simple: Until usb_remove_hcd() is called, the controller is still running and therefore needs to have a valid clock signal.
Alan Stern
Manjunath Goudar
Separate the TI OHCI OMAP3 host controller driver from ohci-hcd host code so that it can be built as a separate driver module. This work is part of enabling multi-platform kernels on ARM; it would be nice to have in 3.11.
Signed-off-by: Manjunath Goudar manjunath.goudar@linaro.org Cc: Anand Gadiyar gadiyar@ti.com Cc: Felipe Balbi balbi@ti.com Cc: Arnd Bergmann arnd@arndb.de Cc: Greg KH greg@kroah.com Cc: Alan Stern stern@rowland.harvard.edu Cc: linux-usb@vger.kernel.org
V2: -ohci_setup() removed because it is called in .reset member of the ohci_hc_driver structure. -The improper multi-line commenting style written in proper way. ('*' characters aligned in vertically).
V3: -RemoteWakeupConnected setting has been removed. --- drivers/usb/host/Kconfig | 2 +- drivers/usb/host/Makefile | 1 + drivers/usb/host/ohci-hcd.c | 18 ------- drivers/usb/host/ohci-omap3.c | 113 ++++++++++++----------------------------- 4 files changed, 34 insertions(+), 100 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 7a87c72..db20e43 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -383,7 +383,7 @@ config USB_OHCI_HCD_OMAP1 Enables support for the OHCI controller on OMAP1/2 chips.
config USB_OHCI_HCD_OMAP3 - bool "OHCI support for OMAP3 and later chips" + tristate "OHCI support for OMAP3 and later chips" depends on (ARCH_OMAP3 || ARCH_OMAP4) default y ---help--- diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 52f2c44..9f2f5f3 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -47,6 +47,7 @@ obj-$(CONFIG_USB_OHCI_HCD_PCI) += ohci-pci.o obj-$(CONFIG_USB_OHCI_HCD_PLATFORM) += ohci-platform.o obj-$(CONFIG_USB_OHCI_EXYNOS) += ohci-exynos.o obj-$(CONFIG_USB_OHCI_HCD_OMAP1) += ohci-omap.o +obj-$(CONFIG_USB_OHCI_HCD_OMAP3) += ohci-omap3.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o obj-$(CONFIG_USB_FHCI_HCD) += fhci.o diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index 1abc1e7..cad51d2 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1182,11 +1182,6 @@ MODULE_LICENSE ("GPL"); #define S3C2410_PLATFORM_DRIVER ohci_hcd_s3c2410_driver #endif
-#ifdef CONFIG_USB_OHCI_HCD_OMAP3 -#include "ohci-omap3.c" -#define OMAP3_PLATFORM_DRIVER ohci_hcd_omap3_driver -#endif - #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx) #include "ohci-pxa27x.c" #define PLATFORM_DRIVER ohci_hcd_pxa27x_driver @@ -1284,12 +1279,6 @@ static int __init ohci_hcd_mod_init(void) goto error_platform; #endif
-#ifdef OMAP3_PLATFORM_DRIVER - retval = platform_driver_register(&OMAP3_PLATFORM_DRIVER); - if (retval < 0) - goto error_omap3_platform; -#endif - #ifdef OF_PLATFORM_DRIVER retval = platform_driver_register(&OF_PLATFORM_DRIVER); if (retval < 0) @@ -1393,10 +1382,6 @@ static int __init ohci_hcd_mod_init(void) platform_driver_unregister(&OF_PLATFORM_DRIVER); error_of_platform: #endif -#ifdef OMAP3_PLATFORM_DRIVER - platform_driver_unregister(&OMAP3_PLATFORM_DRIVER); - error_omap3_platform: -#endif #ifdef PLATFORM_DRIVER platform_driver_unregister(&PLATFORM_DRIVER); error_platform: @@ -1448,9 +1433,6 @@ static void __exit ohci_hcd_mod_exit(void) #ifdef OF_PLATFORM_DRIVER platform_driver_unregister(&OF_PLATFORM_DRIVER); #endif -#ifdef OMAP3_PLATFORM_DRIVER - platform_driver_unregister(&OMAP3_PLATFORM_DRIVER); -#endif #ifdef PLATFORM_DRIVER platform_driver_unregister(&PLATFORM_DRIVER); #endif diff --git a/drivers/usb/host/ohci-omap3.c b/drivers/usb/host/ohci-omap3.c index 8f71357..f2de21b 100644 --- a/drivers/usb/host/ohci-omap3.c +++ b/drivers/usb/host/ohci-omap3.c @@ -29,90 +29,22 @@ * - add kernel-doc */
+#include <linux/dma-mapping.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/usb/otg.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> -#include <linux/of.h> -#include <linux/dma-mapping.h> - -/*-------------------------------------------------------------------------*/ - -static int ohci_omap3_init(struct usb_hcd *hcd) -{ - dev_dbg(hcd->self.controller, "starting OHCI controller\n"); - - return ohci_init(hcd_to_ohci(hcd)); -} - -/*-------------------------------------------------------------------------*/ - -static int ohci_omap3_start(struct usb_hcd *hcd) -{ - struct ohci_hcd *ohci = hcd_to_ohci(hcd); - int ret; - - /* - * RemoteWakeupConnected has to be set explicitly before - * calling ohci_run. The reset value of RWC is 0. - */ - ohci->hc_control = OHCI_CTRL_RWC; - writel(OHCI_CTRL_RWC, &ohci->regs->control); - - ret = ohci_run(ohci); - - if (ret < 0) { - dev_err(hcd->self.controller, "can't start\n"); - ohci_stop(hcd); - } - - return ret; -} - -/*-------------------------------------------------------------------------*/ - -static const struct hc_driver ohci_omap3_hc_driver = { - .description = hcd_name, - .product_desc = "OMAP3 OHCI Host Controller", - .hcd_priv_size = sizeof(struct ohci_hcd), - - /* - * generic hardware linkage - */ - .irq = ohci_irq, - .flags = HCD_USB11 | HCD_MEMORY, - - /* - * basic lifecycle operations - */ - .reset = ohci_omap3_init, - .start = ohci_omap3_start, - .stop = ohci_stop, - .shutdown = ohci_shutdown, - - /* - * managing i/o requests and associated device resources - */ - .urb_enqueue = ohci_urb_enqueue, - .urb_dequeue = ohci_urb_dequeue, - .endpoint_disable = ohci_endpoint_disable, +#include <linux/usb.h> +#include <linux/usb/hcd.h>
- /* - * scheduling support - */ - .get_frame_number = ohci_get_frame, +#include "ohci.h"
- /* - * root hub support - */ - .hub_status_data = ohci_hub_status_data, - .hub_control = ohci_hub_control, -#ifdef CONFIG_PM - .bus_suspend = ohci_bus_suspend, - .bus_resume = ohci_bus_resume, -#endif - .start_port_reset = ohci_start_port_reset, -}; +#define DRIVER_DESC "OHCI OMAP3 driver"
-/*-------------------------------------------------------------------------*/ +static const char hcd_name[] = "ohci-omap3"; +static struct hc_driver __read_mostly ohci_omap3_hc_driver;
/* * configure so an HC device and id are always provided @@ -129,6 +61,7 @@ static const struct hc_driver ohci_omap3_hc_driver = { static int ohci_hcd_omap3_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct ohci_hcd *ohci; struct usb_hcd *hcd = NULL; void __iomem *regs = NULL; struct resource *res; @@ -185,8 +118,6 @@ static int ohci_hcd_omap3_probe(struct platform_device *pdev) pm_runtime_enable(dev); pm_runtime_get_sync(dev);
- ohci_hcd_init(hcd_to_ohci(hcd)); - ret = usb_add_hcd(hcd, irq, 0); if (ret) { dev_dbg(dev, "failed to add hcd with err %d\n", ret); @@ -256,5 +187,25 @@ static struct platform_driver ohci_hcd_omap3_driver = { }, };
+static int __init ohci_omap3_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + + ohci_init_driver(&ohci_omap3_hc_driver, NULL); + return platform_driver_register(&ohci_hcd_omap3_driver); +} +module_init(ohci_omap3_init); + +static void __exit ohci_omap3_cleanup(void) +{ + platform_driver_unregister(&ohci_hcd_omap3_driver); +} +module_exit(ohci_omap3_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); MODULE_ALIAS("platform:ohci-omap3"); MODULE_AUTHOR("Anand Gadiyar gadiyar@ti.com"); +MODULE_LICENSE("GPL");
On Tue, 25 Jun 2013, Manjunath Goudar wrote:
Separate the TI OHCI OMAP3 host controller driver from ohci-hcd host code so that it can be built as a separate driver module. This work is part of enabling multi-platform kernels on ARM; it would be nice to have in 3.11.
Signed-off-by: Manjunath Goudar manjunath.goudar@linaro.org Cc: Anand Gadiyar gadiyar@ti.com Cc: Felipe Balbi balbi@ti.com Cc: Arnd Bergmann arnd@arndb.de Cc: Greg KH greg@kroah.com Cc: Alan Stern stern@rowland.harvard.edu Cc: linux-usb@vger.kernel.org
V2: -ohci_setup() removed because it is called in .reset member of the ohci_hc_driver structure. -The improper multi-line commenting style written in proper way. ('*' characters aligned in vertically).
V3: -RemoteWakeupConnected setting has been removed.
You weren't supposed to remove it! I told you to remove this one line:
writel(OHCI_CTRL_RWC, &ohci->regs->control);
The preceding lines:
/* * RemoteWakeupConnected has to be set explicitly before * calling ohci_run. The reset value of RWC is 0. */ ohci->hc_control = OHCI_CTRL_RWC;
should remain.
Alan Stern
On 25 June 2013 23:44, Alan Stern stern@rowland.harvard.edu wrote:
On Tue, 25 Jun 2013, Manjunath Goudar wrote:
Separate the TI OHCI OMAP3 host controller driver from ohci-hcd host code so that it can be built as a separate driver module. This work is part of enabling multi-platform kernels on ARM; it would be nice to have in 3.11.
Signed-off-by: Manjunath Goudar manjunath.goudar@linaro.org Cc: Anand Gadiyar gadiyar@ti.com Cc: Felipe Balbi balbi@ti.com Cc: Arnd Bergmann arnd@arndb.de Cc: Greg KH greg@kroah.com Cc: Alan Stern stern@rowland.harvard.edu Cc: linux-usb@vger.kernel.org
V2: -ohci_setup() removed because it is called in .reset member of the ohci_hc_driver structure. -The improper multi-line commenting style written in proper way. ('*' characters aligned in vertically).
V3: -RemoteWakeupConnected setting has been removed.
You weren't supposed to remove it! I told you to remove this one line:
writel(OHCI_CTRL_RWC, &ohci->regs->control);The preceding lines:
/* * RemoteWakeupConnected has to be set explicitly before * calling ohci_run. The reset value of RWC is 0. */ ohci->hc_control = OHCI_CTRL_RWC;should remain.
Alan Stern
Sure I will make this change.
Is any other work left out in this series.
Manjunath Goudar
Separate the ST OHCI SPEAr host controller driver from ohci-hcd host code so that it can be built as a separate driver module. This work is part of enabling multi-platform kernels on ARM; it would be nice to have in 3.11.
Signed-off-by: Manjunath Goudar manjunath.goudar@linaro.org Acked-by: Alan Stern stern@rowland.harvard.edu Cc: Viresh Kumar viresh.linux@gmail.com Cc: Arnd Bergmann arnd@arndb.de Cc: Greg KH greg@kroah.com Cc: linux-usb@vger.kernel.org
V2: -ohci_setup() removed because it is called in .reset member of the ohci_hc_driver structure. -debugging stuff isn't needed any more that's what removed.
V3: No change. --- drivers/usb/host/Kconfig | 8 +++ drivers/usb/host/Makefile | 1 + drivers/usb/host/ohci-hcd.c | 18 ------ drivers/usb/host/ohci-spear.c | 140 +++++++++++++++++------------------------ 4 files changed, 65 insertions(+), 102 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index db20e43..46c2f42 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -382,6 +382,14 @@ config USB_OHCI_HCD_OMAP1 ---help--- Enables support for the OHCI controller on OMAP1/2 chips.
+config USB_OHCI_HCD_SPEAR + tristate "Support for ST SPEAr on-chip OHCI USB controller" + depends on USB_OHCI_HCD && PLAT_SPEAR + default y + ---help--- + Enables support for the on-chip OHCI controller on + ST SPEAr chips. + config USB_OHCI_HCD_OMAP3 tristate "OHCI support for OMAP3 and later chips" depends on (ARCH_OMAP3 || ARCH_OMAP4) diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 9f2f5f3..26cb6b3 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -48,6 +48,7 @@ obj-$(CONFIG_USB_OHCI_HCD_PLATFORM) += ohci-platform.o obj-$(CONFIG_USB_OHCI_EXYNOS) += ohci-exynos.o obj-$(CONFIG_USB_OHCI_HCD_OMAP1) += ohci-omap.o obj-$(CONFIG_USB_OHCI_HCD_OMAP3) += ohci-omap3.o +obj-$(CONFIG_USB_OHCI_HCD_SPEAR) += ohci-spear.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o obj-$(CONFIG_USB_FHCI_HCD) += fhci.o diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index cad51d2..34ec156 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1212,11 +1212,6 @@ MODULE_LICENSE ("GPL"); #define OF_PLATFORM_DRIVER ohci_hcd_ppc_of_driver #endif
-#ifdef CONFIG_PLAT_SPEAR -#include "ohci-spear.c" -#define SPEAR_PLATFORM_DRIVER spear_ohci_hcd_driver -#endif - #ifdef CONFIG_PPC_PS3 #include "ohci-ps3.c" #define PS3_SYSTEM_BUS_DRIVER ps3_ohci_driver @@ -1333,19 +1328,9 @@ static int __init ohci_hcd_mod_init(void) goto error_davinci; #endif
-#ifdef SPEAR_PLATFORM_DRIVER - retval = platform_driver_register(&SPEAR_PLATFORM_DRIVER); - if (retval < 0) - goto error_spear; -#endif - return retval;
/* Error path */ -#ifdef SPEAR_PLATFORM_DRIVER - platform_driver_unregister(&SPEAR_PLATFORM_DRIVER); - error_spear: -#endif #ifdef DAVINCI_PLATFORM_DRIVER platform_driver_unregister(&DAVINCI_PLATFORM_DRIVER); error_davinci: @@ -1403,9 +1388,6 @@ module_init(ohci_hcd_mod_init);
static void __exit ohci_hcd_mod_exit(void) { -#ifdef SPEAR_PLATFORM_DRIVER - platform_driver_unregister(&SPEAR_PLATFORM_DRIVER); -#endif #ifdef DAVINCI_PLATFORM_DRIVER platform_driver_unregister(&DAVINCI_PLATFORM_DRIVER); #endif diff --git a/drivers/usb/host/ohci-spear.c b/drivers/usb/host/ohci-spear.c index cc9dd9e..31ff3fc 100644 --- a/drivers/usb/host/ohci-spear.c +++ b/drivers/usb/host/ohci-spear.c @@ -11,92 +11,37 @@ * warranty of any kind, whether express or implied. */
-#include <linux/signal.h> -#include <linux/platform_device.h> #include <linux/clk.h> +#include <linux/dma-mapping.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> #include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/signal.h> +#include <linux/usb.h> +#include <linux/usb/hcd.h> + +#include "ohci.h"
+#define DRIVER_DESC "OHCI SPEAr driver" + +static const char hcd_name[] = "SPEAr-ohci"; 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_prepare_enable(ohci->clk); -} - -static void spear_stop_ohci(struct spear_ohci *ohci) -{ - clk_disable_unprepare(ohci->clk); -} - -static int 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, +#define to_spear_ohci(hcd) (struct spear_ohci *)(hcd_to_ohci(hcd)->priv)
- /* root hub support */ - .hub_status_data = ohci_hub_status_data, - .hub_control = ohci_hub_control, - - .start_port_reset = ohci_start_port_reset, -}; +static struct hc_driver __read_mostly ohci_spear_hc_driver;
static int spear_ohci_hcd_drv_probe(struct platform_device *pdev) { const struct hc_driver *driver = &ohci_spear_hc_driver; + struct ohci_hcd *ohci; struct usb_hcd *hcd = NULL; struct clk *usbh_clk; - struct spear_ohci *ohci_p; + struct spear_ohci *sohci_p; struct resource *res; int retval, irq;
@@ -151,16 +96,18 @@ static int spear_ohci_hcd_drv_probe(struct platform_device *pdev) goto err_put_hcd; }
- 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)); + sohci_p = to_spear_ohci(hcd); + sohci_p->clk = usbh_clk; + + clk_prepare_enable(sohci_p->clk); + + ohci = hcd_to_ohci(hcd);
retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), 0); if (retval == 0) return retval;
- spear_stop_ohci(ohci_p); + clk_disable_unprepare(sohci_p->clk); err_put_hcd: usb_put_hcd(hcd); fail: @@ -172,11 +119,11 @@ fail: 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); + struct spear_ohci *sohci_p = to_spear_ohci(hcd);
usb_remove_hcd(hcd); - if (ohci_p->clk) - spear_stop_ohci(ohci_p); + if (sohci_p->clk) + clk_disable_unprepare(sohci_p->clk);
usb_put_hcd(hcd); return 0; @@ -188,13 +135,14 @@ static int spear_ohci_hcd_drv_suspend(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); + struct spear_ohci *sohci_p = to_spear_ohci(hcd);
if (time_before(jiffies, ohci->next_statechange)) msleep(5); ohci->next_statechange = jiffies;
- spear_stop_ohci(ohci_p); + clk_disable_unprepare(sohci_p->clk); + return 0; }
@@ -202,13 +150,13 @@ 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); + struct spear_ohci *sohci_p = to_spear_ohci(hcd);
if (time_before(jiffies, ohci->next_statechange)) msleep(5); ohci->next_statechange = jiffies;
- spear_start_ohci(ohci_p); + clk_prepare_enable(sohci_p->clk); ohci_resume(hcd, false); return 0; } @@ -234,4 +182,28 @@ static struct platform_driver spear_ohci_hcd_driver = { }, };
+static const struct ohci_driver_overrides spear_overrides __initconst = { + .extra_priv_size = sizeof(struct spear_ohci), +}; +static int __init ohci_spear_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + + ohci_init_driver(&ohci_spear_hc_driver, &spear_overrides); + return platform_driver_register(&spear_ohci_hcd_driver); +} +module_init(ohci_spear_init); + +static void __exit ohci_spear_cleanup(void) +{ + platform_driver_unregister(&spear_ohci_hcd_driver); +} +module_exit(ohci_spear_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_AUTHOR("Deepak Sikri"); +MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:spear-ohci");
Separate the TI OHCI Atmel host controller driver from ohci-hcd host code so that it can be built as a separate driver module. This work is part of enabling multi-platform kernels on ARM; it would be nice to have in 3.11.
Signed-off-by: Manjunath Goudar manjunath.goudar@linaro.org Cc: Arnd Bergmann arnd@arndb.de Cc: Alan Stern stern@rowland.harvard.edu Cc: Greg KH greg@kroah.com Cc: linux-usb@vger.kernel.org
V2: -Set non-standard fields in ohci_at91_hc_driver manually, rather than relying on an expanded struct ohci_driver_overrides. -Save orig_ohci_hub_control and orig_ohci_hub_status_data rather than relying on ohci_hub_control and hub_status_data being exported. -ohci_setup() has been removed because it is called in .reset member of the ohci_hc_driver structure.
V3: -The ohci_restart() function is not required in current scenario, only discarding connection state of integrated transceivers is sufficient, for this directly handling ohci->hc_control. --- drivers/usb/host/Kconfig | 8 +++ drivers/usb/host/Makefile | 1 + drivers/usb/host/ohci-at91.c | 151 +++++++++++++++++++----------------------- drivers/usb/host/ohci-hcd.c | 18 ----- 4 files changed, 77 insertions(+), 101 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 46c2f42..e4dc9ab 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -390,6 +390,14 @@ config USB_OHCI_HCD_SPEAR Enables support for the on-chip OHCI controller on ST SPEAr chips.
+config USB_OHCI_HCD_AT91 + tristate "Support for Atmel on-chip OHCI USB controller" + depends on USB_OHCI_HCD && ARCH_AT91 + default y + ---help--- + Enables support for the on-chip OHCI controller on + Atmel chips. + config USB_OHCI_HCD_OMAP3 tristate "OHCI support for OMAP3 and later chips" depends on (ARCH_OMAP3 || ARCH_OMAP4) diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 26cb6b3..f3e02c0 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -49,6 +49,7 @@ obj-$(CONFIG_USB_OHCI_EXYNOS) += ohci-exynos.o obj-$(CONFIG_USB_OHCI_HCD_OMAP1) += ohci-omap.o obj-$(CONFIG_USB_OHCI_HCD_OMAP3) += ohci-omap3.o obj-$(CONFIG_USB_OHCI_HCD_SPEAR) += ohci-spear.o +obj-$(CONFIG_USB_OHCI_HCD_AT91) += ohci-at91.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o obj-$(CONFIG_USB_FHCI_HCD) += fhci.o diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c index 2ee1496..4c01759 100644 --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c @@ -13,27 +13,41 @@ */
#include <linux/clk.h> -#include <linux/platform_device.h> +#include <linux/dma-mapping.h> #include <linux/of_platform.h> #include <linux/of_gpio.h> +#include <linux/platform_device.h> #include <linux/platform_data/atmel.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/usb/hcd.h>
#include <mach/hardware.h> #include <asm/gpio.h>
#include <mach/cpu.h>
-#ifndef CONFIG_ARCH_AT91 -#error "CONFIG_ARCH_AT91 must be defined." -#endif + +#include "ohci.h"
#define valid_port(index) ((index) >= 0 && (index) < AT91_MAX_USBH_PORTS) #define at91_for_each_port(index) \ for ((index) = 0; (index) < AT91_MAX_USBH_PORTS; (index)++)
/* interface and function clocks; sometimes also an AHB clock */ + +#define DRIVER_DESC "OHCI Atmel driver" + +static const char hcd_name[] = "ohci-atmel"; + +static struct hc_driver __read_mostly ohci_at91_hc_driver; static struct clk *iclk, *fclk, *hclk; static int clocked; +static int (*orig_ohci_hub_control)(struct usb_hcd *hcd, u16 typeReq, u16 wValue, + u16 wIndex, char *buf, u16 wLength); +static int (*orig_ohci_hub_status_data)(struct usb_hcd *hcd, char *buf);
extern int usb_disabled(void);
@@ -111,6 +125,8 @@ static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *); static int usb_hcd_at91_probe(const struct hc_driver *driver, struct platform_device *pdev) { + struct at91_usbh_data *board; + struct ohci_hcd *ohci; int retval; struct usb_hcd *hcd = NULL;
@@ -163,8 +179,10 @@ static int usb_hcd_at91_probe(const struct hc_driver *driver, goto err5; }
+ board = hcd->self.controller->platform_data; + ohci = hcd_to_ohci(hcd); + ohci->num_ports = board->ports; at91_start_hc(pdev); - ohci_hcd_init(hcd_to_ohci(hcd));
retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED); if (retval == 0) @@ -221,36 +239,6 @@ static void usb_hcd_at91_remove(struct usb_hcd *hcd, }
/*-------------------------------------------------------------------------*/ - -static int -ohci_at91_reset (struct usb_hcd *hcd) -{ - struct at91_usbh_data *board = hcd->self.controller->platform_data; - struct ohci_hcd *ohci = hcd_to_ohci (hcd); - int ret; - - if ((ret = ohci_init(ohci)) < 0) - return ret; - - ohci->num_ports = board->ports; - return 0; -} - -static int -ohci_at91_start (struct usb_hcd *hcd) -{ - struct ohci_hcd *ohci = hcd_to_ohci (hcd); - int ret; - - if ((ret = ohci_run(ohci)) < 0) { - dev_err(hcd->self.controller, "can't start %s\n", - hcd->self.bus_name); - ohci_stop(hcd); - return ret; - } - return 0; -} - static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable) { if (!valid_port(port)) @@ -281,7 +269,7 @@ static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port) static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf) { struct at91_usbh_data *pdata = hcd->self.controller->platform_data; - int length = ohci_hub_status_data(hcd, buf); + int length = orig_ohci_hub_status_data(hcd, buf); int port;
at91_for_each_port(port) { @@ -359,7 +347,8 @@ static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, break; }
- ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength); + ret = orig_ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, + buf, wLength); if (ret) goto out;
@@ -413,51 +402,6 @@ static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
/*-------------------------------------------------------------------------*/
-static const struct hc_driver ohci_at91_hc_driver = { - .description = hcd_name, - .product_desc = "AT91 OHCI", - .hcd_priv_size = sizeof(struct ohci_hcd), - - /* - * generic hardware linkage - */ - .irq = ohci_irq, - .flags = HCD_USB11 | HCD_MEMORY, - - /* - * basic lifecycle operations - */ - .reset = ohci_at91_reset, - .start = ohci_at91_start, - .stop = ohci_stop, - .shutdown = ohci_shutdown, - - /* - * 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_at91_hub_status_data, - .hub_control = ohci_at91_hub_control, -#ifdef CONFIG_PM - .bus_suspend = ohci_bus_suspend, - .bus_resume = ohci_bus_resume, -#endif - .start_port_reset = ohci_start_port_reset, -}; - -/*-------------------------------------------------------------------------*/ - static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data) { struct platform_device *pdev = data; @@ -686,7 +630,11 @@ ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg) * REVISIT: some boards will be able to turn VBUS off... */ if (at91_suspend_entering_slow_clock()) { - ohci_usb_reset (ohci); + ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); + ohci->hc_control &= OHCI_CTRL_RWC; + ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); + ohci->rh_state = OHCI_RH_HALTED; + /* flush the writes */ (void) ohci_readl (ohci, &ohci->regs->control); at91_stop_clock(); @@ -727,3 +675,40 @@ static struct platform_driver ohci_hcd_at91_driver = { .of_match_table = of_match_ptr(at91_ohci_dt_ids), }, }; + +static int __init ohci_at91_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + ohci_init_driver(&ohci_at91_hc_driver, NULL); + + /* + * The Atmel HW has some unusual quirks, which require Atmel-specific + * workarounds. We override certain hc_driver functions here to + * achieve that. We explicitly do not enhance ohci_driver_overrides to + * allow this more easily, since this is an unusual case, and we don't + * want to encourage others to override these functions by making it + * too easy. + */ + + orig_ohci_hub_control = ohci_at91_hc_driver.hub_control; + orig_ohci_hub_status_data = ohci_at91_hc_driver.hub_status_data; + + ohci_at91_hc_driver.hub_status_data = ohci_at91_hub_status_data; + ohci_at91_hc_driver.hub_control = ohci_at91_hub_control; + + return platform_driver_register(&ohci_hcd_at91_driver); +} +module_init(ohci_at91_init); + +static void __exit ohci_at91_cleanup(void) +{ + platform_driver_unregister(&ohci_hcd_at91_driver); +} +module_exit(ohci_at91_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index 34ec156..b48c892 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1192,11 +1192,6 @@ MODULE_LICENSE ("GPL"); #define EP93XX_PLATFORM_DRIVER ohci_hcd_ep93xx_driver #endif
-#ifdef CONFIG_ARCH_AT91 -#include "ohci-at91.c" -#define AT91_PLATFORM_DRIVER ohci_hcd_at91_driver -#endif - #ifdef CONFIG_ARCH_LPC32XX #include "ohci-nxp.c" #define NXP_PLATFORM_DRIVER usb_hcd_nxp_driver @@ -1310,12 +1305,6 @@ static int __init ohci_hcd_mod_init(void) goto error_ep93xx; #endif
-#ifdef AT91_PLATFORM_DRIVER - retval = platform_driver_register(&AT91_PLATFORM_DRIVER); - if (retval < 0) - goto error_at91; -#endif - #ifdef NXP_PLATFORM_DRIVER retval = platform_driver_register(&NXP_PLATFORM_DRIVER); if (retval < 0) @@ -1339,10 +1328,6 @@ static int __init ohci_hcd_mod_init(void) platform_driver_unregister(&NXP_PLATFORM_DRIVER); error_nxp: #endif -#ifdef AT91_PLATFORM_DRIVER - platform_driver_unregister(&AT91_PLATFORM_DRIVER); - error_at91: -#endif #ifdef EP93XX_PLATFORM_DRIVER platform_driver_unregister(&EP93XX_PLATFORM_DRIVER); error_ep93xx: @@ -1394,9 +1379,6 @@ static void __exit ohci_hcd_mod_exit(void) #ifdef NXP_PLATFORM_DRIVER platform_driver_unregister(&NXP_PLATFORM_DRIVER); #endif -#ifdef AT91_PLATFORM_DRIVER - platform_driver_unregister(&AT91_PLATFORM_DRIVER); -#endif #ifdef EP93XX_PLATFORM_DRIVER platform_driver_unregister(&EP93XX_PLATFORM_DRIVER); #endif
On Tue, 25 Jun 2013, Manjunath Goudar wrote:
Separate the TI OHCI Atmel host controller driver from ohci-hcd host code so that it can be built as a separate driver module. This work is part of enabling multi-platform kernels on ARM; it would be nice to have in 3.11.
This looks okay except for some very minor issues.
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 46c2f42..e4dc9ab 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -390,6 +390,14 @@ config USB_OHCI_HCD_SPEAR Enables support for the on-chip OHCI controller on ST SPEAr chips. +config USB_OHCI_HCD_AT91
tristate "Support for Atmel on-chip OHCI USB controller"depends on USB_OHCI_HCD && ARCH_AT91default y---help---Enables support for the on-chip OHCI controller onAtmel chips.
Get rid of the extra space after "tristate".
@@ -686,7 +630,11 @@ ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg) * REVISIT: some boards will be able to turn VBUS off... */ if (at91_suspend_entering_slow_clock()) {
ohci_usb_reset (ohci);
ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);ohci->hc_control &= OHCI_CTRL_RWC;ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);ohci->rh_state = OHCI_RH_HALTED;
Even though you're just copying the code, don't also copy its mistakes. Get rid of the extra spaces before the '(' characters.
+static void __exit ohci_at91_cleanup(void) +{
- platform_driver_unregister(&ohci_hcd_at91_driver);
+} +module_exit(ohci_at91_cleanup);
+MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL");
Please move the existing MODULE_ALIAS line down here with these lines.
Alan Stern
Separate the Samsung OHCI S3CXXXX host controller driver from ohci-hcd host code so that it can be built as a separate driver module. This work is part of enabling multi-platform kernels on ARM; it would be nice to have in 3.11.
Signed-off-by: Manjunath Goudar manjunath.goudar@linaro.org Cc: Arnd Bergmann arnd@arndb.de Cc: Alan Stern stern@rowland.harvard.edu Cc: Greg KH greg@kroah.com Cc: linux-usb@vger.kernel.org
V2: -Set non-standard fields in ohci_s3c2410_hc_driver manually, rather than relying on an expanded struct ohci_driver_overrides. -Save orig_ohci_hub_control and orig_ohci_hub_status_data rather than relying on ohci_hub_control and hub_status_data being exported.
V3: -Kconfig wrong parentheses discription fixed. -ohci_setup() has been removed because it is called in .reset member of the ohci_hc_driver structure. --- drivers/usb/host/Kconfig | 8 +++ drivers/usb/host/Makefile | 1 + drivers/usb/host/ohci-hcd.c | 18 ------ drivers/usb/host/ohci-s3c2410.c | 128 +++++++++++++++++---------------------- 4 files changed, 66 insertions(+), 89 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index e4dc9ab..f19524f 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -390,6 +390,14 @@ config USB_OHCI_HCD_SPEAR Enables support for the on-chip OHCI controller on ST SPEAr chips.
+config USB_OHCI_HCD_S3CXXXX + tristate "Support for S3CXXXX on-chip OHCI USB controller" + depends on USB_OHCI_HCD && (ARCH_S3C24XX || ARCH_S3C64XX) + default y + ---help--- + Enables support for the on-chip OHCI controller on + S3CXXXX chips. + config USB_OHCI_HCD_AT91 tristate "Support for Atmel on-chip OHCI USB controller" depends on USB_OHCI_HCD && ARCH_AT91 diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index f3e02c0..9fa4b3e 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -50,6 +50,7 @@ obj-$(CONFIG_USB_OHCI_HCD_OMAP1) += ohci-omap.o obj-$(CONFIG_USB_OHCI_HCD_OMAP3) += ohci-omap3.o obj-$(CONFIG_USB_OHCI_HCD_SPEAR) += ohci-spear.o obj-$(CONFIG_USB_OHCI_HCD_AT91) += ohci-at91.o +obj-$(CONFIG_USB_OHCI_HCD_S3CXXXX) += ohci-s3c2410.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o obj-$(CONFIG_USB_FHCI_HCD) += fhci.o diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index b48c892..b69a49e 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1177,11 +1177,6 @@ MODULE_LICENSE ("GPL"); #define SA1111_DRIVER ohci_hcd_sa1111_driver #endif
-#if defined(CONFIG_ARCH_S3C24XX) || defined(CONFIG_ARCH_S3C64XX) -#include "ohci-s3c2410.c" -#define S3C2410_PLATFORM_DRIVER ohci_hcd_s3c2410_driver -#endif - #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx) #include "ohci-pxa27x.c" #define PLATFORM_DRIVER ohci_hcd_pxa27x_driver @@ -1293,12 +1288,6 @@ static int __init ohci_hcd_mod_init(void) goto error_tmio; #endif
-#ifdef S3C2410_PLATFORM_DRIVER - retval = platform_driver_register(&S3C2410_PLATFORM_DRIVER); - if (retval < 0) - goto error_s3c2410; -#endif - #ifdef EP93XX_PLATFORM_DRIVER retval = platform_driver_register(&EP93XX_PLATFORM_DRIVER); if (retval < 0) @@ -1332,10 +1321,6 @@ static int __init ohci_hcd_mod_init(void) platform_driver_unregister(&EP93XX_PLATFORM_DRIVER); error_ep93xx: #endif -#ifdef S3C2410_PLATFORM_DRIVER - platform_driver_unregister(&S3C2410_PLATFORM_DRIVER); - error_s3c2410: -#endif #ifdef TMIO_OHCI_DRIVER platform_driver_unregister(&TMIO_OHCI_DRIVER); error_tmio: @@ -1382,9 +1367,6 @@ static void __exit ohci_hcd_mod_exit(void) #ifdef EP93XX_PLATFORM_DRIVER platform_driver_unregister(&EP93XX_PLATFORM_DRIVER); #endif -#ifdef S3C2410_PLATFORM_DRIVER - platform_driver_unregister(&S3C2410_PLATFORM_DRIVER); -#endif #ifdef TMIO_OHCI_DRIVER platform_driver_unregister(&TMIO_OHCI_DRIVER); #endif diff --git a/drivers/usb/host/ohci-s3c2410.c b/drivers/usb/host/ohci-s3c2410.c index e125770..b0f6644 100644 --- a/drivers/usb/host/ohci-s3c2410.c +++ b/drivers/usb/host/ohci-s3c2410.c @@ -19,17 +19,34 @@ * This file is licenced under the GPL. */
-#include <linux/platform_device.h> #include <linux/clk.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> #include <linux/platform_data/usb-ohci-s3c2410.h> +#include <linux/usb.h> +#include <linux/usb/hcd.h> + +#include "ohci.h" +
#define valid_port(idx) ((idx) == 1 || (idx) == 2)
/* clock device associated with the hcd */
+ +#define DRIVER_DESC "OHCI S3CXXXX driver" + +static const char hcd_name[] = "ohci-s3cxxxx"; + static struct clk *clk; static struct clk *usb_clk;
+static int (*orig_ohci_hub_control)(struct usb_hcd *hcd, u16 typeReq, + u16 wValue, u16 wIndex, char *buf, u16 wLength); +static int (*orig_ohci_hub_status_data)(struct usb_hcd *hcd, char *buf); + /* forward definitions */
static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc); @@ -93,7 +110,7 @@ ohci_s3c2410_hub_status_data(struct usb_hcd *hcd, char *buf) int orig; int portno;
- orig = ohci_hub_status_data(hcd, buf); + orig = orig_ohci_hub_status_data(hcd, buf);
if (info == NULL) return orig; @@ -164,7 +181,7 @@ static int ohci_s3c2410_hub_control( * process the request straight away and exit */
if (info == NULL) { - ret = ohci_hub_control(hcd, typeReq, wValue, + ret = orig_ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); goto out; } @@ -214,7 +231,7 @@ static int ohci_s3c2410_hub_control( break; }
- ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); + ret = orig_ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); if (ret) goto out;
@@ -373,8 +390,6 @@ static int usb_hcd_s3c2410_probe(const struct hc_driver *driver,
s3c2410_start_hc(dev, hcd);
- ohci_hcd_init(hcd_to_ohci(hcd)); - retval = usb_add_hcd(hcd, dev->resource[1].start, 0); if (retval != 0) goto err_ioremap; @@ -391,71 +406,7 @@ static int usb_hcd_s3c2410_probe(const struct hc_driver *driver,
/*-------------------------------------------------------------------------*/
-static int -ohci_s3c2410_start(struct usb_hcd *hcd) -{ - struct ohci_hcd *ohci = hcd_to_ohci(hcd); - int ret; - - ret = ohci_init(ohci); - if (ret < 0) - return ret; - - ret = ohci_run(ohci); - if (ret < 0) { - dev_err(hcd->self.controller, "can't start %s\n", - hcd->self.bus_name); - ohci_stop(hcd); - return ret; - } - - return 0; -} - - -static const struct hc_driver ohci_s3c2410_hc_driver = { - .description = hcd_name, - .product_desc = "S3C24XX OHCI", - .hcd_priv_size = sizeof(struct ohci_hcd), - - /* - * generic hardware linkage - */ - .irq = ohci_irq, - .flags = HCD_USB11 | HCD_MEMORY, - - /* - * basic lifecycle operations - */ - .start = ohci_s3c2410_start, - .stop = ohci_stop, - .shutdown = ohci_shutdown, - - /* - * 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_s3c2410_hub_status_data, - .hub_control = ohci_s3c2410_hub_control, -#ifdef CONFIG_PM - .bus_suspend = ohci_bus_suspend, - .bus_resume = ohci_bus_resume, -#endif - .start_port_reset = ohci_start_port_reset, -}; - -/* device driver */ +static struct hc_driver __read_mostly ohci_s3c2410_hc_driver;
static int ohci_hcd_s3c2410_drv_probe(struct platform_device *pdev) { @@ -532,4 +483,39 @@ static struct platform_driver ohci_hcd_s3c2410_driver = { }, };
+static int __init ohci_s3cxxxx_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + ohci_init_driver(&ohci_s3c2410_hc_driver, NULL); + + /* + * The Samsung HW has some unusual quirks, which require + * Sumsung-specific workarounds. We override certain hc_driver + * functions here to achieve that. We explicitly do not enhance + * ohci_driver_overrides to allow this more easily, since this + * is an unusual case, and we don't want to encourage others to + * override these functions by making it too easy. + */ + + orig_ohci_hub_control = ohci_s3c2410_hc_driver.hub_control; + orig_ohci_hub_status_data = ohci_s3c2410_hc_driver.hub_status_data; + + ohci_s3c2410_hc_driver.hub_status_data = ohci_s3c2410_hub_status_data; + ohci_s3c2410_hc_driver.hub_control = ohci_s3c2410_hub_control; + + return platform_driver_register(&ohci_hcd_s3c2410_driver); +} +module_init(ohci_s3cxxxx_init); + +static void __exit ohci_s3cxxxx_cleanup(void) +{ + platform_driver_unregister(&ohci_hcd_s3c2410_driver); +} +module_exit(ohci_s3cxxxx_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:s3c2410-ohci");
On Tue, 25 Jun 2013, Manjunath Goudar wrote:
Separate the Samsung OHCI S3CXXXX host controller driver from ohci-hcd host code so that it can be built as a separate driver module. This work is part of enabling multi-platform kernels on ARM; it would be nice to have in 3.11.
This patch looks very good. I have only two very small nits:
diff --git a/drivers/usb/host/ohci-s3c2410.c b/drivers/usb/host/ohci-s3c2410.c index e125770..b0f6644 100644 --- a/drivers/usb/host/ohci-s3c2410.c +++ b/drivers/usb/host/ohci-s3c2410.c @@ -19,17 +19,34 @@
- This file is licenced under the GPL.
*/ -#include <linux/platform_device.h> #include <linux/clk.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> #include <linux/platform_data/usb-ohci-s3c2410.h> +#include <linux/usb.h> +#include <linux/usb/hcd.h>
+#include "ohci.h"
#define valid_port(idx) ((idx) == 1 || (idx) == 2) /* clock device associated with the hcd */
+#define DRIVER_DESC "OHCI S3CXXXX driver"
+static const char hcd_name[] = "ohci-s3cxxxx";
static struct clk *clk; static struct clk *usb_clk; +static int (*orig_ohci_hub_control)(struct usb_hcd *hcd, u16 typeReq,
u16 wValue, u16 wIndex, char *buf, u16 wLength);+static int (*orig_ohci_hub_status_data)(struct usb_hcd *hcd, char *buf);
/* forward definitions */
Do you understand what "forward definitions" means? It refers to declarations of functions whose actual code is given later. In other words, your declarations of orig_ohci_hub_control and orig_ohci_hub_status_data belong just after this comment, not just before it.
@@ -93,7 +110,7 @@ ohci_s3c2410_hub_status_data(struct usb_hcd *hcd, char *buf) int orig; int portno;
- orig = ohci_hub_status_data(hcd, buf);
- orig = orig_ohci_hub_status_data(hcd, buf);
Since you're changing the line anyway, you should get rid of the extra space before the '='.
After you make those two changes, you can add my Acked-by.
Alan Stern
linaro-kernel@lists.linaro.org
-
Alan Stern -
Manjunath Goudar