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path: root/drivers/usb/host/ohci-at91.c
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Diffstat (limited to 'drivers/usb/host/ohci-at91.c')
-rw-r--r--drivers/usb/host/ohci-at91.c307
1 files changed, 141 insertions, 166 deletions
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index 0bf72f943b0..e49eb4f90f5 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -13,26 +13,38 @@
*/
#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/board.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, function and usb clocks; sometimes also an AHB clock */
+static struct clk *iclk, *fclk, *uclk, *hclk;
/* interface and function clocks; sometimes also an AHB clock */
-static struct clk *iclk, *fclk, *hclk;
+
+#define DRIVER_DESC "OHCI Atmel driver"
+
+static const char hcd_name[] = "ohci-atmel";
+
+static struct hc_driver __read_mostly ohci_at91_hc_driver;
static int clocked;
extern int usb_disabled(void);
@@ -41,17 +53,23 @@ extern int usb_disabled(void);
static void at91_start_clock(void)
{
- clk_enable(hclk);
- clk_enable(iclk);
- clk_enable(fclk);
+ if (IS_ENABLED(CONFIG_COMMON_CLK)) {
+ clk_set_rate(uclk, 48000000);
+ clk_prepare_enable(uclk);
+ }
+ clk_prepare_enable(hclk);
+ clk_prepare_enable(iclk);
+ clk_prepare_enable(fclk);
clocked = 1;
}
static void at91_stop_clock(void)
{
- clk_disable(fclk);
- clk_disable(iclk);
- clk_disable(hclk);
+ clk_disable_unprepare(fclk);
+ clk_disable_unprepare(iclk);
+ clk_disable_unprepare(hclk);
+ if (IS_ENABLED(CONFIG_COMMON_CLK))
+ clk_disable_unprepare(uclk);
clocked = 0;
}
@@ -94,7 +112,7 @@ static void at91_stop_hc(struct platform_device *pdev)
/*-------------------------------------------------------------------------*/
-static void __devexit usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *);
+static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *);
/* configure so an HC device and id are always provided */
/* always called with process context; sleeping is OK */
@@ -108,84 +126,83 @@ static void __devexit usb_hcd_at91_remove (struct usb_hcd *, struct platform_dev
* then invokes the start() method for the HCD associated with it
* through the hotplug entry's driver_data.
*/
-static int __devinit usb_hcd_at91_probe(const struct hc_driver *driver,
+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;
-
- if (pdev->num_resources != 2) {
- pr_debug("hcd probe: invalid num_resources");
- return -ENODEV;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ int irq;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_dbg(dev, "hcd probe: missing memory resource\n");
+ return -ENXIO;
}
- if ((pdev->resource[0].flags != IORESOURCE_MEM)
- || (pdev->resource[1].flags != IORESOURCE_IRQ)) {
- pr_debug("hcd probe: invalid resource type\n");
- return -ENODEV;
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_dbg(dev, "hcd probe: missing irq resource\n");
+ return irq;
}
- hcd = usb_create_hcd(driver, &pdev->dev, "at91");
+ hcd = usb_create_hcd(driver, dev, "at91");
if (!hcd)
return -ENOMEM;
- hcd->rsrc_start = pdev->resource[0].start;
- hcd->rsrc_len = resource_size(&pdev->resource[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_debug("request_mem_region failed\n");
- retval = -EBUSY;
- goto err1;
+ hcd->regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(hcd->regs)) {
+ retval = PTR_ERR(hcd->regs);
+ goto err;
}
- hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
- if (!hcd->regs) {
- pr_debug("ioremap failed\n");
- retval = -EIO;
- goto err2;
- }
-
- iclk = clk_get(&pdev->dev, "ohci_clk");
+ iclk = devm_clk_get(dev, "ohci_clk");
if (IS_ERR(iclk)) {
- dev_err(&pdev->dev, "failed to get ohci_clk\n");
+ dev_err(dev, "failed to get ohci_clk\n");
retval = PTR_ERR(iclk);
- goto err3;
+ goto err;
}
- fclk = clk_get(&pdev->dev, "uhpck");
+ fclk = devm_clk_get(dev, "uhpck");
if (IS_ERR(fclk)) {
- dev_err(&pdev->dev, "failed to get uhpck\n");
+ dev_err(dev, "failed to get uhpck\n");
retval = PTR_ERR(fclk);
- goto err4;
+ goto err;
}
- hclk = clk_get(&pdev->dev, "hclk");
+ hclk = devm_clk_get(dev, "hclk");
if (IS_ERR(hclk)) {
- dev_err(&pdev->dev, "failed to get hclk\n");
+ dev_err(dev, "failed to get hclk\n");
retval = PTR_ERR(hclk);
- goto err5;
+ goto err;
+ }
+ if (IS_ENABLED(CONFIG_COMMON_CLK)) {
+ uclk = devm_clk_get(dev, "usb_clk");
+ if (IS_ERR(uclk)) {
+ dev_err(dev, "failed to get uclk\n");
+ retval = PTR_ERR(uclk);
+ goto err;
+ }
}
+ 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)
+ retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
+ if (retval == 0) {
+ device_wakeup_enable(hcd->self.controller);
return retval;
+ }
/* Error handling */
at91_stop_hc(pdev);
- clk_put(hclk);
- err5:
- clk_put(fclk);
- err4:
- clk_put(iclk);
-
- err3:
- iounmap(hcd->regs);
-
- err2:
- release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
-
- err1:
+ err:
usb_put_hcd(hcd);
return retval;
}
@@ -203,54 +220,15 @@ static int __devinit usb_hcd_at91_probe(const struct hc_driver *driver,
* context, "rmmod" or something similar.
*
*/
-static void __devexit usb_hcd_at91_remove(struct usb_hcd *hcd,
+static void usb_hcd_at91_remove(struct usb_hcd *hcd,
struct platform_device *pdev)
{
usb_remove_hcd(hcd);
at91_stop_hc(pdev);
- iounmap(hcd->regs);
- release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
-
- clk_put(hclk);
- clk_put(fclk);
- clk_put(iclk);
- fclk = iclk = hclk = NULL;
-
- dev_set_drvdata(&pdev->dev, NULL);
}
/*-------------------------------------------------------------------------*/
-
-static int __devinit
-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 __devinit
-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))
@@ -301,7 +279,7 @@ static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf)
static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
- struct at91_usbh_data *pdata = hcd->self.controller->platform_data;
+ struct at91_usbh_data *pdata = dev_get_platdata(hcd->self.controller);
struct usb_hub_descriptor *desc;
int ret = -EINVAL;
u32 *data = (u32 *)buf;
@@ -413,55 +391,10 @@ 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;
- struct at91_usbh_data *pdata = pdev->dev.platform_data;
+ struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev);
int val, gpio, port;
/* From the GPIO notifying the over-current situation, find
@@ -504,12 +437,10 @@ static const struct of_device_id at91_ohci_dt_ids[] = {
MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids);
-static u64 at91_ohci_dma_mask = DMA_BIT_MASK(32);
-
-static int __devinit ohci_at91_of_init(struct platform_device *pdev)
+static int ohci_at91_of_init(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
- int i, gpio;
+ int i, gpio, ret;
enum of_gpio_flags flags;
struct at91_usbh_data *pdata;
u32 ports;
@@ -521,8 +452,9 @@ static int __devinit ohci_at91_of_init(struct platform_device *pdev)
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
*/
- if (!pdev->dev.dma_mask)
- pdev->dev.dma_mask = &at91_ohci_dma_mask;
+ ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
@@ -548,7 +480,7 @@ static int __devinit ohci_at91_of_init(struct platform_device *pdev)
return 0;
}
#else
-static int __devinit ohci_at91_of_init(struct platform_device *pdev)
+static int ohci_at91_of_init(struct platform_device *pdev)
{
return 0;
}
@@ -556,7 +488,7 @@ static int __devinit ohci_at91_of_init(struct platform_device *pdev)
/*-------------------------------------------------------------------------*/
-static int __devinit ohci_hcd_at91_drv_probe(struct platform_device *pdev)
+static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
{
struct at91_usbh_data *pdata;
int i;
@@ -567,7 +499,7 @@ static int __devinit ohci_hcd_at91_drv_probe(struct platform_device *pdev)
if (ret)
return ret;
- pdata = pdev->dev.platform_data;
+ pdata = dev_get_platdata(&pdev->dev);
if (pdata) {
at91_for_each_port(i) {
@@ -641,9 +573,9 @@ static int __devinit ohci_hcd_at91_drv_probe(struct platform_device *pdev)
return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev);
}
-static int __devexit ohci_hcd_at91_drv_remove(struct platform_device *pdev)
+static int ohci_hcd_at91_drv_remove(struct platform_device *pdev)
{
- struct at91_usbh_data *pdata = pdev->dev.platform_data;
+ struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev);
int i;
if (pdata) {
@@ -674,10 +606,17 @@ ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ bool do_wakeup = device_may_wakeup(&pdev->dev);
+ int ret;
- if (device_may_wakeup(&pdev->dev))
+ if (do_wakeup)
enable_irq_wake(hcd->irq);
+ ret = ohci_suspend(hcd, do_wakeup);
+ if (ret) {
+ disable_irq_wake(hcd->irq);
+ return ret;
+ }
/*
* The integrated transceivers seem unable to notice disconnect,
* reconnect, or wakeup without the 48 MHz clock active. so for
@@ -686,13 +625,17 @@ 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();
}
- return 0;
+ return ret;
}
static int ohci_hcd_at91_drv_resume(struct platform_device *pdev)
@@ -705,7 +648,7 @@ static int ohci_hcd_at91_drv_resume(struct platform_device *pdev)
if (!clocked)
at91_start_clock();
- ohci_finish_controller_resume(hcd);
+ ohci_resume(hcd, false);
return 0;
}
#else
@@ -713,11 +656,9 @@ static int ohci_hcd_at91_drv_resume(struct platform_device *pdev)
#define ohci_hcd_at91_drv_resume NULL
#endif
-MODULE_ALIAS("platform:at91_ohci");
-
static struct platform_driver ohci_hcd_at91_driver = {
.probe = ohci_hcd_at91_drv_probe,
- .remove = __devexit_p(ohci_hcd_at91_drv_remove),
+ .remove = ohci_hcd_at91_drv_remove,
.shutdown = usb_hcd_platform_shutdown,
.suspend = ohci_hcd_at91_drv_suspend,
.resume = ohci_hcd_at91_drv_resume,
@@ -727,3 +668,37 @@ 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.
+ */
+
+ 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");
+MODULE_ALIAS("platform:at91_ohci");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 14:23:27 +0000