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path: root/drivers/usb/host/ohci-hcd.c
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Diffstat (limited to 'drivers/usb/host/ohci-hcd.c')
-rw-r--r--drivers/usb/host/ohci-hcd.c108
1 files changed, 61 insertions, 47 deletions
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 210181fd98d2..9c7f3008646e 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -16,7 +16,7 @@
* OHCI is the main "non-Intel/VIA" standard for USB 1.1 host controller
* interfaces (though some non-x86 Intel chips use it). It supports
* smarter hardware than UHCI. A download link for the spec available
- * through the http://www.usb.org website.
+ * through the https://www.usb.org website.
*
* This file is licenced under the GPL.
*/
@@ -40,10 +40,11 @@
#include <linux/dmapool.h>
#include <linux/workqueue.h>
#include <linux/debugfs.h>
+#include <linux/genalloc.h>
#include <asm/io.h>
#include <asm/irq.h>
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
#include <asm/byteorder.h>
@@ -101,7 +102,7 @@ static void io_watchdog_func(struct timer_list *t);
/* Some boards misreport power switching/overcurrent */
-static bool distrust_firmware = true;
+static bool distrust_firmware;
module_param (distrust_firmware, bool, 0);
MODULE_PARM_DESC (distrust_firmware,
"true to distrust firmware power/overcurrent setup");
@@ -170,7 +171,7 @@ static int ohci_urb_enqueue (
/* 1 TD for setup, 1 for ACK, plus ... */
size = 2;
- /* FALLTHROUGH */
+ fallthrough;
// case PIPE_INTERRUPT:
// case PIPE_BULK:
default:
@@ -180,8 +181,7 @@ static int ohci_urb_enqueue (
size++;
else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
&& (urb->transfer_buffer_length
- % usb_maxpacket (urb->dev, pipe,
- usb_pipeout (pipe))) == 0)
+ % usb_maxpacket(urb->dev, pipe)) == 0)
size++;
break;
case PIPE_ISOCHRONOUS: /* number of packets from URB */
@@ -190,8 +190,7 @@ static int ohci_urb_enqueue (
}
/* allocate the private part of the URB */
- urb_priv = kzalloc (sizeof (urb_priv_t) + size * sizeof (struct td *),
- mem_flags);
+ urb_priv = kzalloc(struct_size(urb_priv, td, size), mem_flags);
if (!urb_priv)
return -ENOMEM;
INIT_LIST_HEAD (&urb_priv->pending);
@@ -384,7 +383,7 @@ sanitize:
ed_free (ohci, ed);
break;
}
- /* fall through */
+ fallthrough;
default:
/* caller was supposed to have unlinked any requests;
* that's not our job. can't recover; must leak ed.
@@ -418,8 +417,7 @@ static void ohci_usb_reset (struct ohci_hcd *ohci)
* other cases where the next software may expect clean state from the
* "firmware". this is bus-neutral, unlike shutdown() methods.
*/
-static void
-ohci_shutdown (struct usb_hcd *hcd)
+static void _ohci_shutdown(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci;
@@ -435,6 +433,16 @@ ohci_shutdown (struct usb_hcd *hcd)
ohci->rh_state = OHCI_RH_HALTED;
}
+static void ohci_shutdown(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ohci->lock, flags);
+ _ohci_shutdown(hcd);
+ spin_unlock_irqrestore(&ohci->lock, flags);
+}
+
/*-------------------------------------------------------------------------*
* HC functions
*-------------------------------------------------------------------------*/
@@ -447,7 +455,7 @@ static int ohci_init (struct ohci_hcd *ohci)
struct usb_hcd *hcd = ohci_to_hcd(ohci);
/* Accept arbitrarily long scatter-gather lists */
- if (!(hcd->driver->flags & HCD_LOCAL_MEM))
+ if (!hcd->localmem_pool)
hcd->self.sg_tablesize = ~0;
if (distrust_firmware)
@@ -505,8 +513,15 @@ static int ohci_init (struct ohci_hcd *ohci)
timer_setup(&ohci->io_watchdog, io_watchdog_func, 0);
ohci->prev_frame_no = IO_WATCHDOG_OFF;
- ohci->hcca = dma_alloc_coherent (hcd->self.controller,
- sizeof(*ohci->hcca), &ohci->hcca_dma, GFP_KERNEL);
+ if (hcd->localmem_pool)
+ ohci->hcca = gen_pool_dma_alloc_align(hcd->localmem_pool,
+ sizeof(*ohci->hcca),
+ &ohci->hcca_dma, 256);
+ else
+ ohci->hcca = dma_alloc_coherent(hcd->self.controller,
+ sizeof(*ohci->hcca),
+ &ohci->hcca_dma,
+ GFP_KERNEL);
if (!ohci->hcca)
return -ENOMEM;
@@ -656,20 +671,24 @@ retry:
/* handle root hub init quirks ... */
val = roothub_a (ohci);
- val &= ~(RH_A_PSM | RH_A_OCPM);
+ /* Configure for per-port over-current protection by default */
+ val &= ~RH_A_NOCP;
+ val |= RH_A_OCPM;
if (ohci->flags & OHCI_QUIRK_SUPERIO) {
- /* NSC 87560 and maybe others */
+ /* NSC 87560 and maybe others.
+ * Ganged power switching, no over-current protection.
+ */
val |= RH_A_NOCP;
- val &= ~(RH_A_POTPGT | RH_A_NPS);
- ohci_writel (ohci, val, &ohci->regs->roothub.a);
+ val &= ~(RH_A_POTPGT | RH_A_NPS | RH_A_PSM | RH_A_OCPM);
} else if ((ohci->flags & OHCI_QUIRK_AMD756) ||
(ohci->flags & OHCI_QUIRK_HUB_POWER)) {
/* hub power always on; required for AMD-756 and some
- * Mac platforms. ganged overcurrent reporting, if any.
+ * Mac platforms.
*/
val |= RH_A_NPS;
- ohci_writel (ohci, val, &ohci->regs->roothub.a);
}
+ ohci_writel(ohci, val, &ohci->regs->roothub.a);
+
ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status);
ohci_writel (ohci, (val & RH_A_NPS) ? 0 : RH_B_PPCM,
&ohci->regs->roothub.b);
@@ -727,7 +746,8 @@ static int ohci_start(struct usb_hcd *hcd)
*/
static void io_watchdog_func(struct timer_list *t)
{
- struct ohci_hcd *ohci = from_timer(ohci, t, io_watchdog);
+ struct ohci_hcd *ohci = timer_container_of(ohci, t,
+ io_watchdog);
bool takeback_all_pending = false;
u32 status;
u32 head;
@@ -752,7 +772,7 @@ static void io_watchdog_func(struct timer_list *t)
died:
usb_hc_died(ohci_to_hcd(ohci));
ohci_dump(ohci);
- ohci_shutdown(ohci_to_hcd(ohci));
+ _ohci_shutdown(ohci_to_hcd(ohci));
goto done;
} else {
/* No write back because the done queue was empty */
@@ -869,6 +889,7 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
/* Check for an all 1's result which is a typical consequence
* of dead, unclocked, or unplugged (CardBus...) devices
*/
+again:
if (ints == ~(u32)0) {
ohci->rh_state = OHCI_RH_HALTED;
ohci_dbg (ohci, "device removed!\n");
@@ -963,6 +984,13 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
}
spin_unlock(&ohci->lock);
+ /* repeat until all enabled interrupts are handled */
+ if (ohci->rh_state != OHCI_RH_HALTED) {
+ ints = ohci_readl(ohci, &regs->intrstatus);
+ if (ints && (ints & ohci_readl(ohci, &regs->intrenable)))
+ goto again;
+ }
+
return IRQ_HANDLED;
}
@@ -976,7 +1004,7 @@ static void ohci_stop (struct usb_hcd *hcd)
if (quirk_nec(ohci))
flush_work(&ohci->nec_work);
- del_timer_sync(&ohci->io_watchdog);
+ timer_delete_sync(&ohci->io_watchdog);
ohci->prev_frame_no = IO_WATCHDOG_OFF;
ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
@@ -990,9 +1018,14 @@ static void ohci_stop (struct usb_hcd *hcd)
remove_debug_files (ohci);
ohci_mem_cleanup (ohci);
if (ohci->hcca) {
- dma_free_coherent (hcd->self.controller,
- sizeof *ohci->hcca,
- ohci->hcca, ohci->hcca_dma);
+ if (hcd->localmem_pool)
+ gen_pool_free(hcd->localmem_pool,
+ (unsigned long)ohci->hcca,
+ sizeof(*ohci->hcca));
+ else
+ dma_free_coherent(hcd->self.controller,
+ sizeof(*ohci->hcca),
+ ohci->hcca, ohci->hcca_dma);
ohci->hcca = NULL;
ohci->hcca_dma = 0;
}
@@ -1029,7 +1062,7 @@ int ohci_restart(struct ohci_hcd *ohci)
ed->ed_next = ohci->ed_rm_list;
ed->ed_prev = NULL;
ohci->ed_rm_list = ed;
- /* FALLTHROUGH */
+ fallthrough;
case ED_UNLINK:
break;
default:
@@ -1165,7 +1198,7 @@ static const struct hc_driver ohci_hc_driver = {
* generic hardware linkage
*/
.irq = ohci_irq,
- .flags = HCD_MEMORY | HCD_USB11,
+ .flags = HCD_MEMORY | HCD_DMA | HCD_USB11,
/*
* basic lifecycle operations
@@ -1240,11 +1273,6 @@ MODULE_LICENSE ("GPL");
#define SM501_OHCI_DRIVER ohci_hcd_sm501_driver
#endif
-#ifdef CONFIG_MFD_TC6393XB
-#include "ohci-tmio.c"
-#define TMIO_OHCI_DRIVER ohci_hcd_tmio_driver
-#endif
-
static int __init ohci_hcd_mod_init(void)
{
int retval = 0;
@@ -1252,7 +1280,6 @@ static int __init ohci_hcd_mod_init(void)
if (usb_disabled())
return -ENODEV;
- printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
pr_debug ("%s: block sizes: ed %zd td %zd\n", hcd_name,
sizeof (struct ed), sizeof (struct td));
set_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
@@ -1283,19 +1310,9 @@ static int __init ohci_hcd_mod_init(void)
goto error_sm501;
#endif
-#ifdef TMIO_OHCI_DRIVER
- retval = platform_driver_register(&TMIO_OHCI_DRIVER);
- if (retval < 0)
- goto error_tmio;
-#endif
-
return retval;
/* Error path */
-#ifdef TMIO_OHCI_DRIVER
- platform_driver_unregister(&TMIO_OHCI_DRIVER);
- error_tmio:
-#endif
#ifdef SM501_OHCI_DRIVER
platform_driver_unregister(&SM501_OHCI_DRIVER);
error_sm501:
@@ -1322,9 +1339,6 @@ module_init(ohci_hcd_mod_init);
static void __exit ohci_hcd_mod_exit(void)
{
-#ifdef TMIO_OHCI_DRIVER
- platform_driver_unregister(&TMIO_OHCI_DRIVER);
-#endif
#ifdef SM501_OHCI_DRIVER
platform_driver_unregister(&SM501_OHCI_DRIVER);
#endif
generated by cgit (git 2.34.1) at 2025-12-25 13:02:37 +0000