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[PATCH] USB: omap_udc updates (mostly cleanups)

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Various USB patches, mostly for portability:

  - Fifo mode 1 didn't work previously (oopsed), so now it's fixed and
    (why not) defines even more endpoints for composite devices.

  - OMAP 1710 doesn't have an internal transceiver.

  - Small PM update:  if the USB link is suspended, don't disconnect on
    entry to deep sleep.

  - Be more correct about handling zero length control reads.  OMAP
    seems to mis-handle that protocol peculiarity though; best avoided.

  - Platform device resources (for UDC and OTG controllers) now use
    physical addresses, so /proc/iomem is more consistent.

  - Minor cleanups, notably (by volume) for "sparse" NULL warnings.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
David Brownell 2005-04-11 15:38:25 -07:00 committed by Greg Kroah-Hartman
parent d794ac7ae3
commit 313980c927
2 changed files with 98 additions and 62 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/arm/mach-omap/usb.c
View File

@ -288,8 +288,8 @@ static void usb_release(struct device *dev)
static struct resource udc_resources[] = {
/* order is significant! */
{ /* registers */
.start = IO_ADDRESS(UDC_BASE),
.end = IO_ADDRESS(UDC_BASE + 0xff),
.start = UDC_BASE,
.end = UDC_BASE + 0xff,
.flags = IORESOURCE_MEM,
}, { /* general IRQ */
.start = IH2_BASE + 20,
@ -355,8 +355,8 @@ static struct platform_device ohci_device = {
static struct resource otg_resources[] = {
/* order is significant! */
{
.start = IO_ADDRESS(OTG_BASE),
.end = IO_ADDRESS(OTG_BASE + 0xff),
.start = OTG_BASE,
.end = OTG_BASE + 0xff,
.flags = IORESOURCE_MEM,
}, {
.start = IH2_BASE + 8,

152
drivers/usb/gadget/omap_udc.c
View File

@ -52,7 +52,6 @@
#include <asm/mach-types.h>
#include <asm/arch/dma.h>
#include <asm/arch/mux.h>
#include <asm/arch/usb.h>
#include "omap_udc.h"
@ -253,7 +252,7 @@ static int omap_ep_disable(struct usb_ep *_ep)
}
spin_lock_irqsave(&ep->udc->lock, flags);
ep->desc = 0;
ep->desc = NULL;
nuke (ep, -ESHUTDOWN);
ep->ep.maxpacket = ep->maxpacket;
ep->has_dma = 0;
@ -388,8 +387,8 @@ done(struct omap_ep *ep, struct omap_req *req, int status)
/*-------------------------------------------------------------------------*/
#define FIFO_FULL (UDC_NON_ISO_FIFO_FULL | UDC_ISO_FIFO_FULL)
#define FIFO_UNWRITABLE (UDC_EP_HALTED | FIFO_FULL)
#define UDC_FIFO_FULL (UDC_NON_ISO_FIFO_FULL | UDC_ISO_FIFO_FULL)
#define UDC_FIFO_UNWRITABLE (UDC_EP_HALTED | UDC_FIFO_FULL)
#define FIFO_EMPTY (UDC_NON_ISO_FIFO_EMPTY | UDC_ISO_FIFO_EMPTY)
#define FIFO_UNREADABLE (UDC_EP_HALTED | FIFO_EMPTY)
@ -433,7 +432,7 @@ static int write_fifo(struct omap_ep *ep, struct omap_req *req)
/* PIO-IN isn't double buffered except for iso */
ep_stat = UDC_STAT_FLG_REG;
if (ep_stat & FIFO_UNWRITABLE)
if (ep_stat & UDC_FIFO_UNWRITABLE)
return 0;
count = ep->ep.maxpacket;
@ -504,7 +503,7 @@ static int read_fifo(struct omap_ep *ep, struct omap_req *req)
if (ep_stat & UDC_EP_HALTED)
break;
if (ep_stat & FIFO_FULL)
if (ep_stat & UDC_FIFO_FULL)
avail = ep->ep.maxpacket;
else {
avail = UDC_RXFSTAT_REG;
@ -856,7 +855,7 @@ static void dma_channel_release(struct omap_ep *ep)
if (!list_empty(&ep->queue))
req = container_of(ep->queue.next, struct omap_req, queue);
else
req = 0;
req = NULL;
active = ((1 << 7) & omap_readl(OMAP_DMA_CCR(ep->lch))) != 0;
@ -997,18 +996,19 @@ omap_ep_queue(struct usb_ep *_ep, struct usb_request *_req, int gfp_flags)
UDC_IRQ_EN_REG = irq_en;
}
/* STATUS is reverse direction */
UDC_EP_NUM_REG = is_in
? UDC_EP_SEL
: (UDC_EP_SEL|UDC_EP_DIR);
/* STATUS for zero length DATA stages is
* always an IN ... even for IN transfers,
* a wierd case which seem to stall OMAP.
*/
UDC_EP_NUM_REG = (UDC_EP_SEL|UDC_EP_DIR);
UDC_CTRL_REG = UDC_CLR_EP;
UDC_CTRL_REG = UDC_SET_FIFO_EN;
UDC_EP_NUM_REG = udc->ep0_in ? 0 : UDC_EP_DIR;
UDC_EP_NUM_REG = UDC_EP_DIR;
/* cleanup */
udc->ep0_pending = 0;
done(ep, req, 0);
req = 0;
req = NULL;
/* non-empty DATA stage */
} else if (is_in) {
@ -1029,7 +1029,7 @@ omap_ep_queue(struct usb_ep *_ep, struct usb_request *_req, int gfp_flags)
(is_in ? next_in_dma : next_out_dma)(ep, req);
else if (req) {
if ((is_in ? write_fifo : read_fifo)(ep, req) == 1)
req = 0;
req = NULL;
deselect_ep();
if (!is_in) {
UDC_CTRL_REG = UDC_SET_FIFO_EN;
@ -1041,7 +1041,7 @@ omap_ep_queue(struct usb_ep *_ep, struct usb_request *_req, int gfp_flags)
irq_wait:
/* irq handler advances the queue */
if (req != 0)
if (req != NULL)
list_add_tail(&req->queue, &ep->queue);
spin_unlock_irqrestore(&udc->lock, flags);
@ -1238,6 +1238,8 @@ static int can_pullup(struct omap_udc *udc)
static void pullup_enable(struct omap_udc *udc)
{
udc->gadget.dev.parent->power.power_state = PMSG_ON;
udc->gadget.dev.power.power_state = PMSG_ON;
UDC_SYSCON1_REG |= UDC_PULLUP_EN;
#ifndef CONFIG_USB_OTG
if (!cpu_is_omap15xx())
@ -1382,7 +1384,7 @@ static void update_otg(struct omap_udc *udc)
static void ep0_irq(struct omap_udc *udc, u16 irq_src)
{
struct omap_ep *ep0 = &udc->ep[0];
struct omap_req *req = 0;
struct omap_req *req = NULL;
ep0->irqs++;
@ -1438,7 +1440,7 @@ static void ep0_irq(struct omap_udc *udc, u16 irq_src)
if (req)
done(ep0, req, 0);
}
req = 0;
req = NULL;
} else if (stat & UDC_STALL) {
UDC_CTRL_REG = UDC_CLR_HALT;
UDC_EP_NUM_REG = UDC_EP_DIR;
@ -1511,9 +1513,6 @@ static void ep0_irq(struct omap_udc *udc, u16 irq_src)
u.word[3] = UDC_DATA_REG;
UDC_EP_NUM_REG = 0;
} while (UDC_IRQ_SRC_REG & UDC_SETUP);
le16_to_cpus (&u.r.wValue);
le16_to_cpus (&u.r.wIndex);
le16_to_cpus (&u.r.wLength);
/* Delegate almost all control requests to the gadget driver,
* except for a handful of ch9 status/feature requests that
@ -1566,6 +1565,11 @@ static void ep0_irq(struct omap_udc *udc, u16 irq_src)
UDC_CTRL_REG = UDC_SET_FIFO_EN;
ep->ackwait = 1 + ep->double_buf;
}
/* NOTE: assumes the host behaves sanely,
* only clearing real halts. Else we may
* need to kill pending transfers and then
* restart the queue... very messy for DMA!
*/
}
VDBG("%s halt cleared by host\n", ep->name);
goto ep0out_status_stage;
@ -2013,7 +2017,7 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
udc->softconnect = 1;
/* hook up the driver */
driver->driver.bus = 0;
driver->driver.bus = NULL;
udc->driver = driver;
udc->gadget.dev.driver = &driver->driver;
spin_unlock_irqrestore(&udc->lock, flags);
@ -2021,8 +2025,8 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
status = driver->bind (&udc->gadget);
if (status) {
DBG("bind to %s --> %d\n", driver->driver.name, status);
udc->gadget.dev.driver = 0;
udc->driver = 0;
udc->gadget.dev.driver = NULL;
udc->driver = NULL;
goto done;
}
DBG("bound to driver %s\n", driver->driver.name);
@ -2035,8 +2039,8 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
if (status < 0) {
ERR("can't bind to transceiver\n");
driver->unbind (&udc->gadget);
udc->gadget.dev.driver = 0;
udc->driver = 0;
udc->gadget.dev.driver = NULL;
udc->driver = NULL;
goto done;
}
} else {
@ -2071,7 +2075,7 @@ int usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
omap_vbus_session(&udc->gadget, 0);
if (udc->transceiver)
(void) otg_set_peripheral(udc->transceiver, 0);
(void) otg_set_peripheral(udc->transceiver, NULL);
else
pullup_disable(udc);
@ -2080,9 +2084,8 @@ int usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
spin_unlock_irqrestore(&udc->lock, flags);
driver->unbind(&udc->gadget);
udc->gadget.dev.driver = 0;
udc->driver = 0;
udc->gadget.dev.driver = NULL;
udc->driver = NULL;
DBG("unregistered driver '%s'\n", driver->driver.name);
return status;
@ -2178,7 +2181,7 @@ static int proc_otg_show(struct seq_file *s)
tmp = OTG_REV_REG;
trans = USB_TRANSCEIVER_CTRL_REG;
seq_printf(s, "OTG rev %d.%d, transceiver_ctrl %03x\n",
seq_printf(s, "\nOTG rev %d.%d, transceiver_ctrl %03x\n",
tmp >> 4, tmp & 0xf, trans);
tmp = OTG_SYSCON_1_REG;
seq_printf(s, "otg_syscon1 %08x usb2 %s, usb1 %s, usb0 %s,"
@ -2235,6 +2238,7 @@ static int proc_otg_show(struct seq_file *s)
seq_printf(s, "otg_outctrl %04x" "\n", tmp);
tmp = OTG_TEST_REG;
seq_printf(s, "otg_test %04x" "\n", tmp);
return 0;
}
static int proc_udc_show(struct seq_file *s, void *_)
@ -2378,7 +2382,7 @@ static int proc_udc_show(struct seq_file *s, void *_)
static int proc_udc_open(struct inode *inode, struct file *file)
{
return single_open(file, proc_udc_show, 0);
return single_open(file, proc_udc_show, NULL);
}
static struct file_operations proc_ops = {
@ -2399,7 +2403,7 @@ static void create_proc_file(void)
static void remove_proc_file(void)
{
remove_proc_entry(proc_filename, 0);
remove_proc_entry(proc_filename, NULL);
}
#else
@ -2505,7 +2509,7 @@ static void omap_udc_release(struct device *dev)
{
complete(udc->done);
kfree (udc);
udc = 0;
udc = NULL;
}
static int __init
@ -2577,23 +2581,33 @@ omap_udc_setup(struct platform_device *odev, struct otg_transceiver *xceiv)
case 1:
OMAP_BULK_EP("ep1in", USB_DIR_IN | 1);
OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
OMAP_INT_EP("ep9in", USB_DIR_IN | 9, 16);
OMAP_BULK_EP("ep3in", USB_DIR_IN | 3);
OMAP_BULK_EP("ep4out", USB_DIR_OUT | 4);
OMAP_INT_EP("ep10in", USB_DIR_IN | 10, 16);
OMAP_BULK_EP("ep5in", USB_DIR_IN | 5);
OMAP_BULK_EP("ep5out", USB_DIR_OUT | 5);
OMAP_INT_EP("ep11in", USB_DIR_IN | 11, 16);
OMAP_BULK_EP("ep6in", USB_DIR_IN | 6);
OMAP_BULK_EP("ep6out", USB_DIR_OUT | 6);
OMAP_INT_EP("ep12in", USB_DIR_IN | 12, 16);
OMAP_BULK_EP("ep7in", USB_DIR_IN | 7);
OMAP_BULK_EP("ep7out", USB_DIR_OUT | 7);
OMAP_INT_EP("ep13in", USB_DIR_IN | 13, 16);
OMAP_INT_EP("ep13out", USB_DIR_OUT | 13, 16);
OMAP_BULK_EP("ep8in", USB_DIR_IN | 8);
OMAP_BULK_EP("ep8out", USB_DIR_OUT | 8);
OMAP_INT_EP("ep14in", USB_DIR_IN | 14, 16);
OMAP_INT_EP("ep14out", USB_DIR_OUT | 14, 16);
OMAP_BULK_EP("ep15in", USB_DIR_IN | 15);
OMAP_BULK_EP("ep15out", USB_DIR_OUT | 15);
OMAP_INT_EP("ep9in", USB_DIR_IN | 9, 16);
OMAP_INT_EP("ep10out", USB_DIR_IN | 10, 16);
OMAP_INT_EP("ep11in", USB_DIR_IN | 9, 16);
OMAP_INT_EP("ep12out", USB_DIR_IN | 10, 16);
break;
#ifdef USE_ISO
@ -2640,8 +2654,8 @@ static int __init omap_udc_probe(struct device *dev)
struct platform_device *odev = to_platform_device(dev);
int status = -ENODEV;
int hmc;
struct otg_transceiver *xceiv = 0;
const char *type = 0;
struct otg_transceiver *xceiv = NULL;
const char *type = NULL;
struct omap_usb_config *config = dev->platform_data;
/* NOTE: "knows" the order of the resources! */
@ -2678,6 +2692,15 @@ static int __init omap_udc_probe(struct device *dev)
} else {
hmc = HMC_1610;
switch (hmc) {
case 0: /* POWERUP DEFAULT == 0 */
case 4:
case 12:
case 20:
if (!cpu_is_omap1710()) {
type = "integrated";
break;
}
/* FALL THROUGH */
case 3:
case 11:
case 16:
@ -2688,21 +2711,15 @@ static int __init omap_udc_probe(struct device *dev)
DBG("external transceiver not registered!\n");
if (config->otg)
goto cleanup0;
type = "(unknown external)";
type = "unknown";
} else
type = xceiv->label;
break;
case 0: /* POWERUP DEFAULT == 0 */
case 4:
case 12:
case 20:
type = "INTEGRATED";
break;
case 21: /* internal loopback */
type = "(loopback)";
type = "loopback";
break;
case 14: /* transceiverless */
type = "(none)";
type = "no";
break;
default:
@ -2710,14 +2727,14 @@ static int __init omap_udc_probe(struct device *dev)
return -ENODEV;
}
}
INFO("hmc mode %d, transceiver %s\n", hmc, type);
INFO("hmc mode %d, %s transceiver\n", hmc, type);
/* a "gadget" abstracts/virtualizes the controller */
status = omap_udc_setup(odev, xceiv);
if (status) {
goto cleanup0;
}
xceiv = 0;
xceiv = NULL;
// "udc" is now valid
pullup_disable(udc);
#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
@ -2765,7 +2782,7 @@ cleanup2:
cleanup1:
kfree (udc);
udc = 0;
udc = NULL;
cleanup0:
if (xceiv)
@ -2788,7 +2805,7 @@ static int __exit omap_udc_remove(struct device *dev)
pullup_disable(udc);
if (udc->transceiver) {
put_device(udc->transceiver->dev);
udc->transceiver = 0;
udc->transceiver = NULL;
}
UDC_SYSCON1_REG = 0;
@ -2809,13 +2826,32 @@ static int __exit omap_udc_remove(struct device *dev)
return 0;
}
static int omap_udc_suspend(struct device *dev, pm_message_t state, u32 level)
/* suspend/resume/wakeup from sysfs (echo > power/state) or when the
* system is forced into deep sleep
*
* REVISIT we should probably reject suspend requests when there's a host
* session active, rather than disconnecting, at least on boards that can
* report VBUS irqs (UDC_DEVSTAT_REG.UDC_ATT). And in any case, we need to
* make host resumes and VBUS detection trigger OMAP wakeup events; that
* may involve talking to an external transceiver (e.g. isp1301).
*/
static int omap_udc_suspend(struct device *dev, pm_message_t message, u32 level)
{
if (level != 0)
return 0;
u32 devstat;
if (level != SUSPEND_POWER_DOWN)
return 0;
devstat = UDC_DEVSTAT_REG;
/* we're requesting 48 MHz clock if the pullup is enabled
* (== we're attached to the host) and we're not suspended,
* which would prevent entry to deep sleep...
*/
if ((devstat & UDC_ATT) != 0 && (devstat & UDC_SUS) == 0) {
WARN("session active; suspend requires disconnect\n");
omap_pullup(&udc->gadget, 0);
}
DBG("suspend, state %d\n", state);
omap_pullup(&udc->gadget, 0);
udc->gadget.dev.power.power_state = PMSG_SUSPEND;
udc->gadget.dev.parent->power.power_state = PMSG_SUSPEND;
return 0;
@ -2823,7 +2859,7 @@ static int omap_udc_suspend(struct device *dev, pm_message_t state, u32 level)
static int omap_udc_resume(struct device *dev, u32 level)
{
if (level != 0)
if (level != RESUME_POWER_ON)
return 0;
DBG("resume + wakeup/SRP\n");