mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
361 lines
8.6 KiB
361 lines
8.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* Generic platform ohci driver |
|
* |
|
* Copyright 2007 Michael Buesch <[email protected]> |
|
* Copyright 2011-2012 Hauke Mehrtens <[email protected]> |
|
* Copyright 2014 Hans de Goede <[email protected]> |
|
* |
|
* Derived from the OCHI-SSB driver |
|
* Derived from the OHCI-PCI driver |
|
* Copyright 1999 Roman Weissgaerber |
|
* Copyright 2000-2002 David Brownell |
|
* Copyright 1999 Linus Torvalds |
|
* Copyright 1999 Gregory P. Smith |
|
*/ |
|
|
|
#include <linux/clk.h> |
|
#include <linux/dma-mapping.h> |
|
#include <linux/hrtimer.h> |
|
#include <linux/io.h> |
|
#include <linux/kernel.h> |
|
#include <linux/module.h> |
|
#include <linux/err.h> |
|
#include <linux/of.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/pm_runtime.h> |
|
#include <linux/reset.h> |
|
#include <linux/usb/ohci_pdriver.h> |
|
#include <linux/usb.h> |
|
#include <linux/usb/hcd.h> |
|
|
|
#include "ohci.h" |
|
|
|
#define DRIVER_DESC "OHCI generic platform driver" |
|
#define OHCI_MAX_CLKS 3 |
|
#define hcd_to_ohci_priv(h) ((struct ohci_platform_priv *)hcd_to_ohci(h)->priv) |
|
|
|
struct ohci_platform_priv { |
|
struct clk *clks[OHCI_MAX_CLKS]; |
|
struct reset_control *resets; |
|
}; |
|
|
|
static const char hcd_name[] = "ohci-platform"; |
|
|
|
static int ohci_platform_power_on(struct platform_device *dev) |
|
{ |
|
struct usb_hcd *hcd = platform_get_drvdata(dev); |
|
struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd); |
|
int clk, ret; |
|
|
|
for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) { |
|
ret = clk_prepare_enable(priv->clks[clk]); |
|
if (ret) |
|
goto err_disable_clks; |
|
} |
|
|
|
return 0; |
|
|
|
err_disable_clks: |
|
while (--clk >= 0) |
|
clk_disable_unprepare(priv->clks[clk]); |
|
|
|
return ret; |
|
} |
|
|
|
static void ohci_platform_power_off(struct platform_device *dev) |
|
{ |
|
struct usb_hcd *hcd = platform_get_drvdata(dev); |
|
struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd); |
|
int clk; |
|
|
|
for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--) |
|
if (priv->clks[clk]) |
|
clk_disable_unprepare(priv->clks[clk]); |
|
} |
|
|
|
static struct hc_driver __read_mostly ohci_platform_hc_driver; |
|
|
|
static const struct ohci_driver_overrides platform_overrides __initconst = { |
|
.product_desc = "Generic Platform OHCI controller", |
|
.extra_priv_size = sizeof(struct ohci_platform_priv), |
|
}; |
|
|
|
static struct usb_ohci_pdata ohci_platform_defaults = { |
|
.power_on = ohci_platform_power_on, |
|
.power_suspend = ohci_platform_power_off, |
|
.power_off = ohci_platform_power_off, |
|
}; |
|
|
|
static int ohci_platform_probe(struct platform_device *dev) |
|
{ |
|
struct usb_hcd *hcd; |
|
struct resource *res_mem; |
|
struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev); |
|
struct ohci_platform_priv *priv; |
|
struct ohci_hcd *ohci; |
|
int err, irq, clk = 0; |
|
|
|
if (usb_disabled()) |
|
return -ENODEV; |
|
|
|
/* |
|
* Use reasonable defaults so platforms don't have to provide these |
|
* with DT probing on ARM. |
|
*/ |
|
if (!pdata) |
|
pdata = &ohci_platform_defaults; |
|
|
|
err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32)); |
|
if (err) |
|
return err; |
|
|
|
irq = platform_get_irq(dev, 0); |
|
if (irq < 0) |
|
return irq; |
|
|
|
hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev, |
|
dev_name(&dev->dev)); |
|
if (!hcd) |
|
return -ENOMEM; |
|
|
|
platform_set_drvdata(dev, hcd); |
|
dev->dev.platform_data = pdata; |
|
priv = hcd_to_ohci_priv(hcd); |
|
ohci = hcd_to_ohci(hcd); |
|
|
|
if (pdata == &ohci_platform_defaults && dev->dev.of_node) { |
|
if (of_property_read_bool(dev->dev.of_node, "big-endian-regs")) |
|
ohci->flags |= OHCI_QUIRK_BE_MMIO; |
|
|
|
if (of_property_read_bool(dev->dev.of_node, "big-endian-desc")) |
|
ohci->flags |= OHCI_QUIRK_BE_DESC; |
|
|
|
if (of_property_read_bool(dev->dev.of_node, "big-endian")) |
|
ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC; |
|
|
|
if (of_property_read_bool(dev->dev.of_node, "no-big-frame-no")) |
|
ohci->flags |= OHCI_QUIRK_FRAME_NO; |
|
|
|
if (of_property_read_bool(dev->dev.of_node, |
|
"remote-wakeup-connected")) |
|
ohci->hc_control = OHCI_CTRL_RWC; |
|
|
|
of_property_read_u32(dev->dev.of_node, "num-ports", |
|
&ohci->num_ports); |
|
|
|
for (clk = 0; clk < OHCI_MAX_CLKS; clk++) { |
|
priv->clks[clk] = of_clk_get(dev->dev.of_node, clk); |
|
if (IS_ERR(priv->clks[clk])) { |
|
err = PTR_ERR(priv->clks[clk]); |
|
if (err == -EPROBE_DEFER) |
|
goto err_put_clks; |
|
priv->clks[clk] = NULL; |
|
break; |
|
} |
|
} |
|
|
|
priv->resets = devm_reset_control_array_get_optional_shared( |
|
&dev->dev); |
|
if (IS_ERR(priv->resets)) { |
|
err = PTR_ERR(priv->resets); |
|
goto err_put_clks; |
|
} |
|
|
|
err = reset_control_deassert(priv->resets); |
|
if (err) |
|
goto err_put_clks; |
|
} |
|
|
|
if (pdata->big_endian_desc) |
|
ohci->flags |= OHCI_QUIRK_BE_DESC; |
|
if (pdata->big_endian_mmio) |
|
ohci->flags |= OHCI_QUIRK_BE_MMIO; |
|
if (pdata->no_big_frame_no) |
|
ohci->flags |= OHCI_QUIRK_FRAME_NO; |
|
if (pdata->num_ports) |
|
ohci->num_ports = pdata->num_ports; |
|
|
|
#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO |
|
if (ohci->flags & OHCI_QUIRK_BE_MMIO) { |
|
dev_err(&dev->dev, |
|
"Error: CONFIG_USB_OHCI_BIG_ENDIAN_MMIO not set\n"); |
|
err = -EINVAL; |
|
goto err_reset; |
|
} |
|
#endif |
|
#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_DESC |
|
if (ohci->flags & OHCI_QUIRK_BE_DESC) { |
|
dev_err(&dev->dev, |
|
"Error: CONFIG_USB_OHCI_BIG_ENDIAN_DESC not set\n"); |
|
err = -EINVAL; |
|
goto err_reset; |
|
} |
|
#endif |
|
|
|
pm_runtime_set_active(&dev->dev); |
|
pm_runtime_enable(&dev->dev); |
|
if (pdata->power_on) { |
|
err = pdata->power_on(dev); |
|
if (err < 0) |
|
goto err_reset; |
|
} |
|
|
|
res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0); |
|
hcd->regs = devm_ioremap_resource(&dev->dev, res_mem); |
|
if (IS_ERR(hcd->regs)) { |
|
err = PTR_ERR(hcd->regs); |
|
goto err_power; |
|
} |
|
hcd->rsrc_start = res_mem->start; |
|
hcd->rsrc_len = resource_size(res_mem); |
|
|
|
err = usb_add_hcd(hcd, irq, IRQF_SHARED); |
|
if (err) |
|
goto err_power; |
|
|
|
device_wakeup_enable(hcd->self.controller); |
|
|
|
platform_set_drvdata(dev, hcd); |
|
|
|
return err; |
|
|
|
err_power: |
|
if (pdata->power_off) |
|
pdata->power_off(dev); |
|
err_reset: |
|
pm_runtime_disable(&dev->dev); |
|
reset_control_assert(priv->resets); |
|
err_put_clks: |
|
while (--clk >= 0) |
|
clk_put(priv->clks[clk]); |
|
|
|
if (pdata == &ohci_platform_defaults) |
|
dev->dev.platform_data = NULL; |
|
|
|
usb_put_hcd(hcd); |
|
|
|
return err; |
|
} |
|
|
|
static int ohci_platform_remove(struct platform_device *dev) |
|
{ |
|
struct usb_hcd *hcd = platform_get_drvdata(dev); |
|
struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev); |
|
struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd); |
|
int clk; |
|
|
|
pm_runtime_get_sync(&dev->dev); |
|
usb_remove_hcd(hcd); |
|
|
|
if (pdata->power_off) |
|
pdata->power_off(dev); |
|
|
|
reset_control_assert(priv->resets); |
|
|
|
for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) |
|
clk_put(priv->clks[clk]); |
|
|
|
usb_put_hcd(hcd); |
|
|
|
pm_runtime_put_sync(&dev->dev); |
|
pm_runtime_disable(&dev->dev); |
|
|
|
if (pdata == &ohci_platform_defaults) |
|
dev->dev.platform_data = NULL; |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
static int ohci_platform_suspend(struct device *dev) |
|
{ |
|
struct usb_hcd *hcd = dev_get_drvdata(dev); |
|
struct usb_ohci_pdata *pdata = dev->platform_data; |
|
struct platform_device *pdev = to_platform_device(dev); |
|
bool do_wakeup = device_may_wakeup(dev); |
|
int ret; |
|
|
|
ret = ohci_suspend(hcd, do_wakeup); |
|
if (ret) |
|
return ret; |
|
|
|
if (pdata->power_suspend) |
|
pdata->power_suspend(pdev); |
|
|
|
return ret; |
|
} |
|
|
|
static int ohci_platform_resume(struct device *dev) |
|
{ |
|
struct usb_hcd *hcd = dev_get_drvdata(dev); |
|
struct usb_ohci_pdata *pdata = dev_get_platdata(dev); |
|
struct platform_device *pdev = to_platform_device(dev); |
|
|
|
if (pdata->power_on) { |
|
int err = pdata->power_on(pdev); |
|
if (err < 0) |
|
return err; |
|
} |
|
|
|
ohci_resume(hcd, false); |
|
|
|
pm_runtime_disable(dev); |
|
pm_runtime_set_active(dev); |
|
pm_runtime_enable(dev); |
|
|
|
return 0; |
|
} |
|
#endif /* CONFIG_PM_SLEEP */ |
|
|
|
static const struct of_device_id ohci_platform_ids[] = { |
|
{ .compatible = "generic-ohci", }, |
|
{ .compatible = "cavium,octeon-6335-ohci", }, |
|
{ .compatible = "ti,ohci-omap3", }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(of, ohci_platform_ids); |
|
|
|
static const struct platform_device_id ohci_platform_table[] = { |
|
{ "ohci-platform", 0 }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(platform, ohci_platform_table); |
|
|
|
static SIMPLE_DEV_PM_OPS(ohci_platform_pm_ops, ohci_platform_suspend, |
|
ohci_platform_resume); |
|
|
|
static struct platform_driver ohci_platform_driver = { |
|
.id_table = ohci_platform_table, |
|
.probe = ohci_platform_probe, |
|
.remove = ohci_platform_remove, |
|
.shutdown = usb_hcd_platform_shutdown, |
|
.driver = { |
|
.name = "ohci-platform", |
|
.pm = &ohci_platform_pm_ops, |
|
.of_match_table = ohci_platform_ids, |
|
} |
|
}; |
|
|
|
static int __init ohci_platform_init(void) |
|
{ |
|
if (usb_disabled()) |
|
return -ENODEV; |
|
|
|
pr_info("%s: " DRIVER_DESC "\n", hcd_name); |
|
|
|
ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides); |
|
return platform_driver_register(&ohci_platform_driver); |
|
} |
|
module_init(ohci_platform_init); |
|
|
|
static void __exit ohci_platform_cleanup(void) |
|
{ |
|
platform_driver_unregister(&ohci_platform_driver); |
|
} |
|
module_exit(ohci_platform_cleanup); |
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC); |
|
MODULE_AUTHOR("Hauke Mehrtens"); |
|
MODULE_AUTHOR("Alan Stern"); |
|
MODULE_LICENSE("GPL");
|
|
|