linux/drivers/usb/host/ehci-mxc.c

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/*
* Copyright (c) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/usb/otg.h>
#include <linux/usb/ulpi.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/platform_data/usb-ehci-mxc.h>
#include <asm/mach-types.h>
#include "ehci.h"
#define DRIVER_DESC "Freescale On-Chip EHCI Host driver"
static const char hcd_name[] = "ehci-mxc";
#define ULPI_VIEWPORT_OFFSET 0x170
struct ehci_mxc_priv {
struct clk *usbclk, *ahbclk, *phyclk;
};
static struct hc_driver __read_mostly ehci_mxc_hc_driver;
static const struct ehci_driver_overrides ehci_mxc_overrides __initdata = {
.extra_priv_size = sizeof(struct ehci_mxc_priv),
};
static int ehci_mxc_drv_probe(struct platform_device *pdev)
{
struct mxc_usbh_platform_data *pdata = pdev->dev.platform_data;
struct usb_hcd *hcd;
struct resource *res;
int irq, ret;
struct ehci_mxc_priv *priv;
struct device *dev = &pdev->dev;
struct ehci_hcd *ehci;
dev_info(&pdev->dev, "initializing i.MX USB Controller\n");
if (!pdata) {
dev_err(dev, "No platform data given, bailing out.\n");
return -EINVAL;
}
irq = platform_get_irq(pdev, 0);
hcd = usb_create_hcd(&ehci_mxc_hc_driver, dev, dev_name(dev));
if (!hcd)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "Found HC with no register addr. Check setup!\n");
ret = -ENODEV;
goto err_alloc;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
hcd->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(hcd->regs)) {
ret = PTR_ERR(hcd->regs);
goto err_alloc;
}
hcd->has_tt = 1;
ehci = hcd_to_ehci(hcd);
priv = (struct ehci_mxc_priv *) ehci->priv;
/* enable clocks */
priv->usbclk = devm_clk_get(&pdev->dev, "ipg");
if (IS_ERR(priv->usbclk)) {
ret = PTR_ERR(priv->usbclk);
goto err_alloc;
}
clk_prepare_enable(priv->usbclk);
priv->ahbclk = devm_clk_get(&pdev->dev, "ahb");
if (IS_ERR(priv->ahbclk)) {
ret = PTR_ERR(priv->ahbclk);
goto err_clk_ahb;
}
clk_prepare_enable(priv->ahbclk);
/* "dr" device has its own clock on i.MX51 */
priv->phyclk = devm_clk_get(&pdev->dev, "phy");
if (IS_ERR(priv->phyclk))
priv->phyclk = NULL;
if (priv->phyclk)
clk_prepare_enable(priv->phyclk);
/* call platform specific init function */
if (pdata->init) {
ret = pdata->init(pdev);
if (ret) {
dev_err(dev, "platform init failed\n");
goto err_init;
}
/* platforms need some time to settle changed IO settings */
mdelay(10);
}
/* EHCI registers start at offset 0x100 */
ehci->caps = hcd->regs + 0x100;
ehci->regs = hcd->regs + 0x100 +
HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
/* set up the PORTSCx register */
ehci_writel(ehci, pdata->portsc, &ehci->regs->port_status[0]);
/* is this really needed? */
msleep(10);
/* Initialize the transceiver */
if (pdata->otg) {
pdata->otg->io_priv = hcd->regs + ULPI_VIEWPORT_OFFSET;
ret = usb_phy_init(pdata->otg);
USB: ehci-mxc: bail out on transceiver problems The old code registered the hcd even if there were no transceivers detected, leading to oopses like this if we try to probe a non-existant ULPI: [ 2.730000] mxc-ehci mxc-ehci.0: unable to init transceiver [ 2.740000] timeout polling for ULPI device [ 2.740000] timeout polling for ULPI device [ 2.750000] mxc-ehci mxc-ehci.0: unable to enable vbus on transceiver [ 2.750000] mxc-ehci mxc-ehci.0: Freescale On-Chip EHCI Host Controller [ 2.760000] mxc-ehci mxc-ehci.0: new USB bus registered, assigned bus number 2 [ 2.770000] Unhandled fault: external abort on non-linefetch (0x808) at 0xc4876184 [ 2.770000] Internal error: : 808 [#1] PREEMPT [ 2.770000] last sysfs file: [ 2.770000] Modules linked in: [ 2.770000] CPU: 0 Not tainted (2.6.33.5 #5) [ 2.770000] PC is at ehci_hub_control+0x4d4/0x8f8 [ 2.770000] LR is at ehci_mxc_setup+0xbc/0xdc [ 2.770000] pc : [<c0196dfc>] lr : [<c019bc8c>] psr: 00000093 [ 2.770000] sp : c3815e40 ip : 00000001 fp : 60000013 [ 2.770000] r10: c4876184 r9 : 00000000 r8 : c3814000 [ 2.770000] r7 : c391d2cc r6 : 00000001 r5 : 00000001 r4 : 00000000 [ 2.770000] r3 : 80000000 r2 : 00000007 r1 : 80000000 r0 : c4876184 [ 2.770000] Flags: nzcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel [ 2.770000] Control: 0005317f Table: a0004000 DAC: 00000017 [ 2.770000] Process swapper (pid: 1, stack limit = 0xc3814270) ... Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: stable <stable@kernel.org> Acked-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-06-15 18:34:23 +08:00
if (ret) {
dev_err(dev, "unable to init transceiver, probably missing\n");
ret = -ENODEV;
goto err_add;
}
ret = otg_set_vbus(pdata->otg->otg, 1);
USB: ehci-mxc: bail out on transceiver problems The old code registered the hcd even if there were no transceivers detected, leading to oopses like this if we try to probe a non-existant ULPI: [ 2.730000] mxc-ehci mxc-ehci.0: unable to init transceiver [ 2.740000] timeout polling for ULPI device [ 2.740000] timeout polling for ULPI device [ 2.750000] mxc-ehci mxc-ehci.0: unable to enable vbus on transceiver [ 2.750000] mxc-ehci mxc-ehci.0: Freescale On-Chip EHCI Host Controller [ 2.760000] mxc-ehci mxc-ehci.0: new USB bus registered, assigned bus number 2 [ 2.770000] Unhandled fault: external abort on non-linefetch (0x808) at 0xc4876184 [ 2.770000] Internal error: : 808 [#1] PREEMPT [ 2.770000] last sysfs file: [ 2.770000] Modules linked in: [ 2.770000] CPU: 0 Not tainted (2.6.33.5 #5) [ 2.770000] PC is at ehci_hub_control+0x4d4/0x8f8 [ 2.770000] LR is at ehci_mxc_setup+0xbc/0xdc [ 2.770000] pc : [<c0196dfc>] lr : [<c019bc8c>] psr: 00000093 [ 2.770000] sp : c3815e40 ip : 00000001 fp : 60000013 [ 2.770000] r10: c4876184 r9 : 00000000 r8 : c3814000 [ 2.770000] r7 : c391d2cc r6 : 00000001 r5 : 00000001 r4 : 00000000 [ 2.770000] r3 : 80000000 r2 : 00000007 r1 : 80000000 r0 : c4876184 [ 2.770000] Flags: nzcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel [ 2.770000] Control: 0005317f Table: a0004000 DAC: 00000017 [ 2.770000] Process swapper (pid: 1, stack limit = 0xc3814270) ... Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: stable <stable@kernel.org> Acked-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-06-15 18:34:23 +08:00
if (ret) {
dev_err(dev, "unable to enable vbus on transceiver\n");
USB: ehci-mxc: bail out on transceiver problems The old code registered the hcd even if there were no transceivers detected, leading to oopses like this if we try to probe a non-existant ULPI: [ 2.730000] mxc-ehci mxc-ehci.0: unable to init transceiver [ 2.740000] timeout polling for ULPI device [ 2.740000] timeout polling for ULPI device [ 2.750000] mxc-ehci mxc-ehci.0: unable to enable vbus on transceiver [ 2.750000] mxc-ehci mxc-ehci.0: Freescale On-Chip EHCI Host Controller [ 2.760000] mxc-ehci mxc-ehci.0: new USB bus registered, assigned bus number 2 [ 2.770000] Unhandled fault: external abort on non-linefetch (0x808) at 0xc4876184 [ 2.770000] Internal error: : 808 [#1] PREEMPT [ 2.770000] last sysfs file: [ 2.770000] Modules linked in: [ 2.770000] CPU: 0 Not tainted (2.6.33.5 #5) [ 2.770000] PC is at ehci_hub_control+0x4d4/0x8f8 [ 2.770000] LR is at ehci_mxc_setup+0xbc/0xdc [ 2.770000] pc : [<c0196dfc>] lr : [<c019bc8c>] psr: 00000093 [ 2.770000] sp : c3815e40 ip : 00000001 fp : 60000013 [ 2.770000] r10: c4876184 r9 : 00000000 r8 : c3814000 [ 2.770000] r7 : c391d2cc r6 : 00000001 r5 : 00000001 r4 : 00000000 [ 2.770000] r3 : 80000000 r2 : 00000007 r1 : 80000000 r0 : c4876184 [ 2.770000] Flags: nzcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel [ 2.770000] Control: 0005317f Table: a0004000 DAC: 00000017 [ 2.770000] Process swapper (pid: 1, stack limit = 0xc3814270) ... Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: stable <stable@kernel.org> Acked-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-06-15 18:34:23 +08:00
goto err_add;
}
}
platform_set_drvdata(pdev, hcd);
ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (ret)
goto err_add;
return 0;
err_add:
if (pdata && pdata->exit)
pdata->exit(pdev);
err_init:
if (priv->phyclk)
clk_disable_unprepare(priv->phyclk);
clk_disable_unprepare(priv->ahbclk);
err_clk_ahb:
clk_disable_unprepare(priv->usbclk);
err_alloc:
usb_put_hcd(hcd);
return ret;
}
static int __exit ehci_mxc_drv_remove(struct platform_device *pdev)
{
struct mxc_usbh_platform_data *pdata = pdev->dev.platform_data;
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
struct ehci_mxc_priv *priv = (struct ehci_mxc_priv *) ehci->priv;
usb_remove_hcd(hcd);
if (pdata && pdata->exit)
pdata->exit(pdev);
if (pdata->otg)
usb_phy_shutdown(pdata->otg);
clk_disable_unprepare(priv->usbclk);
clk_disable_unprepare(priv->ahbclk);
if (priv->phyclk)
clk_disable_unprepare(priv->phyclk);
usb_put_hcd(hcd);
platform_set_drvdata(pdev, NULL);
return 0;
}
static void ehci_mxc_drv_shutdown(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
if (hcd->driver->shutdown)
hcd->driver->shutdown(hcd);
}
MODULE_ALIAS("platform:mxc-ehci");
static struct platform_driver ehci_mxc_driver = {
.probe = ehci_mxc_drv_probe,
.remove = ehci_mxc_drv_remove,
.shutdown = ehci_mxc_drv_shutdown,
.driver = {
.name = "mxc-ehci",
},
};
static int __init ehci_mxc_init(void)
{
if (usb_disabled())
return -ENODEV;
pr_info("%s: " DRIVER_DESC "\n", hcd_name);
ehci_init_driver(&ehci_mxc_hc_driver, &ehci_mxc_overrides);
return platform_driver_register(&ehci_mxc_driver);
}
module_init(ehci_mxc_init);
static void __exit ehci_mxc_cleanup(void)
{
platform_driver_unregister(&ehci_mxc_driver);
}
module_exit(ehci_mxc_cleanup);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Sascha Hauer");
MODULE_LICENSE("GPL");