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USB: omap_udc build fixes (sync with linux-omap) 

Resync the omap_udc driver with the latest from the Linux-OMAP tree.
Changes include DMA API updates (it builds again!), clock/pm updates,
minor bugfixes, whitespace.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Brownell 2006-12-10 11:47:04 -08:00 committed by Greg Kroah-Hartman
parent 6a3c3d4952
commit e6a6e472f5
2 changed files with 195 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

245
drivers/usb/gadget/omap_udc.c
View File

@ -42,6 +42,7 @@
#include <linux/usb_gadget.h>
#include <linux/usb/otg.h>
#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <asm/byteorder.h>
#include <asm/io.h>
@ -60,6 +61,11 @@
/* bulk DMA seems to be behaving for both IN and OUT */
#define USE_DMA
/* FIXME: OMAP2 currently has some problem in DMA mode */
#ifdef CONFIG_ARCH_OMAP2
#undef USE_DMA
#endif
/* ISO too */
#define USE_ISO
@ -99,7 +105,7 @@ static unsigned fifo_mode = 0;
* boot parameter "omap_udc:fifo_mode=42"
*/
module_param (fifo_mode, uint, 0);
MODULE_PARM_DESC (fifo_mode, "endpoint setup (0 == default)");
MODULE_PARM_DESC (fifo_mode, "endpoint configuration");
#ifdef USE_DMA
static unsigned use_dma = 1;
@ -122,7 +128,7 @@ static const char driver_desc [] = DRIVER_DESC;
/*-------------------------------------------------------------------------*/
/* there's a notion of "current endpoint" for modifying endpoint
* state, and PIO access to its FIFO.
* state, and PIO access to its FIFO.
*/
static void use_ep(struct omap_ep *ep, u16 select)
@ -391,7 +397,7 @@ done(struct omap_ep *ep, struct omap_req *req, int status)
#define FIFO_EMPTY (UDC_NON_ISO_FIFO_EMPTY | UDC_ISO_FIFO_EMPTY)
#define FIFO_UNREADABLE (UDC_EP_HALTED | FIFO_EMPTY)
static inline int
static inline int
write_packet(u8 *buf, struct omap_req *req, unsigned max)
{
unsigned len;
@ -456,7 +462,7 @@ static int write_fifo(struct omap_ep *ep, struct omap_req *req)
return is_last;
}
static inline int
static inline int
read_packet(u8 *buf, struct omap_req *req, unsigned avail)
{
unsigned len;
@ -542,9 +548,9 @@ static inline dma_addr_t dma_csac(unsigned lch)
/* omap 3.2/3.3 erratum: sometimes 0 is returned if CSAC/CDAC is
* read before the DMA controller finished disabling the channel.
*/
csac = omap_readw(OMAP_DMA_CSAC(lch));
csac = OMAP_DMA_CSAC_REG(lch);
if (csac == 0)
csac = omap_readw(OMAP_DMA_CSAC(lch));
csac = OMAP_DMA_CSAC_REG(lch);
return csac;
}
@ -555,9 +561,9 @@ static inline dma_addr_t dma_cdac(unsigned lch)
/* omap 3.2/3.3 erratum: sometimes 0 is returned if CSAC/CDAC is
* read before the DMA controller finished disabling the channel.
*/
cdac = omap_readw(OMAP_DMA_CDAC(lch));
cdac = OMAP_DMA_CDAC_REG(lch);
if (cdac == 0)
cdac = omap_readw(OMAP_DMA_CDAC(lch));
cdac = OMAP_DMA_CDAC_REG(lch);
return cdac;
}
@ -582,7 +588,7 @@ static u16 dma_src_len(struct omap_ep *ep, dma_addr_t start)
}
#define DMA_DEST_LAST(x) (cpu_is_omap15xx() \
? omap_readw(OMAP_DMA_CSAC(x)) /* really: CPC */ \
? OMAP_DMA_CSAC_REG(x) /* really: CPC */ \
: dma_cdac(x))
static u16 dma_dest_len(struct omap_ep *ep, dma_addr_t start)
@ -620,17 +626,19 @@ static void next_in_dma(struct omap_ep *ep, struct omap_req *req)
|| (cpu_is_omap15xx() && length < ep->maxpacket)) {
txdma_ctrl = UDC_TXN_EOT | length;
omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S8,
length, 1, sync_mode);
length, 1, sync_mode, 0, 0);
} else {
length = min(length / ep->maxpacket,
(unsigned) UDC_TXN_TSC + 1);
txdma_ctrl = length;
txdma_ctrl = length;
omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S16,
ep->ep.maxpacket >> 1, length, sync_mode);
ep->ep.maxpacket >> 1, length, sync_mode,
0, 0);
length *= ep->maxpacket;
}
omap_set_dma_src_params(ep->lch, OMAP_DMA_PORT_EMIFF,
OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual);
OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual,
0, 0);
omap_start_dma(ep->lch);
ep->dma_counter = dma_csac(ep->lch);
@ -675,9 +683,11 @@ static void next_out_dma(struct omap_ep *ep, struct omap_req *req)
req->dma_bytes = packets * ep->ep.maxpacket;
omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S16,
ep->ep.maxpacket >> 1, packets,
OMAP_DMA_SYNC_ELEMENT);
OMAP_DMA_SYNC_ELEMENT,
0, 0);
omap_set_dma_dest_params(ep->lch, OMAP_DMA_PORT_EMIFF,
OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual);
OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual,
0, 0);
ep->dma_counter = DMA_DEST_LAST(ep->lch);
UDC_RXDMA_REG(ep->dma_channel) = UDC_RXN_STOP | (packets - 1);
@ -820,7 +830,8 @@ static void dma_channel_claim(struct omap_ep *ep, unsigned channel)
omap_set_dma_dest_params(ep->lch,
OMAP_DMA_PORT_TIPB,
OMAP_DMA_AMODE_CONSTANT,
(unsigned long) io_v2p((u32)&UDC_DATA_DMA_REG));
(unsigned long) io_v2p((u32)&UDC_DATA_DMA_REG),
0, 0);
}
} else {
status = omap_request_dma(OMAP_DMA_USB_W2FC_RX0 - 1 + channel,
@ -831,7 +842,8 @@ static void dma_channel_claim(struct omap_ep *ep, unsigned channel)
omap_set_dma_src_params(ep->lch,
OMAP_DMA_PORT_TIPB,
OMAP_DMA_AMODE_CONSTANT,
(unsigned long) io_v2p((u32)&UDC_DATA_DMA_REG));
(unsigned long) io_v2p((u32)&UDC_DATA_DMA_REG),
0, 0);
/* EMIFF */
omap_set_dma_dest_burst_mode(ep->lch,
OMAP_DMA_DATA_BURST_4);
@ -846,7 +858,7 @@ static void dma_channel_claim(struct omap_ep *ep, unsigned channel)
/* channel type P: hw synch (fifo) */
if (!cpu_is_omap15xx())
omap_writew(2, OMAP_DMA_LCH_CTRL(ep->lch));
OMAP1_DMA_LCH_CTRL_REG(ep->lch) = 2;
}
just_restart:
@ -893,7 +905,7 @@ static void dma_channel_release(struct omap_ep *ep)
else
req = NULL;
active = ((1 << 7) & omap_readl(OMAP_DMA_CCR(ep->lch))) != 0;
active = ((1 << 7) & OMAP_DMA_CCR_REG(ep->lch)) != 0;
DBG("%s release %s %cxdma%d %p\n", ep->ep.name,
active ? "active" : "idle",
@ -1117,7 +1129,7 @@ static int omap_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
*/
dma_channel_release(ep);
dma_channel_claim(ep, channel);
} else
} else
done(ep, req, -ECONNRESET);
spin_unlock_irqrestore(&ep->udc->lock, flags);
return 0;
@ -1153,7 +1165,7 @@ static int omap_ep_set_halt(struct usb_ep *_ep, int value)
/* IN endpoints must already be idle */
if ((ep->bEndpointAddress & USB_DIR_IN)
&& !list_empty(&ep->queue)) {
&& !list_empty(&ep->queue)) {
status = -EAGAIN;
goto done;
}
@ -1298,6 +1310,23 @@ static void pullup_disable(struct omap_udc *udc)
UDC_SYSCON1_REG &= ~UDC_PULLUP_EN;
}
static struct omap_udc *udc;
static void omap_udc_enable_clock(int enable)
{
if (udc == NULL || udc->dc_clk == NULL || udc->hhc_clk == NULL)
return;
if (enable) {
clk_enable(udc->dc_clk);
clk_enable(udc->hhc_clk);
udelay(100);
} else {
clk_disable(udc->hhc_clk);
clk_disable(udc->dc_clk);
}
}
/*
* Called by whatever detects VBUS sessions: external transceiver
* driver, or maybe GPIO0 VBUS IRQ. May request 48 MHz clock.
@ -1318,10 +1347,22 @@ static int omap_vbus_session(struct usb_gadget *gadget, int is_active)
else
FUNC_MUX_CTRL_0_REG &= ~VBUS_CTRL_1510;
}
if (udc->dc_clk != NULL && is_active) {
if (!udc->clk_requested) {
omap_udc_enable_clock(1);
udc->clk_requested = 1;
}
}
if (can_pullup(udc))
pullup_enable(udc);
else
pullup_disable(udc);
if (udc->dc_clk != NULL && !is_active) {
if (udc->clk_requested) {
omap_udc_enable_clock(0);
udc->clk_requested = 0;
}
}
spin_unlock_irqrestore(&udc->lock, flags);
return 0;
}
@ -1441,7 +1482,7 @@ static void ep0_irq(struct omap_udc *udc, u16 irq_src)
}
}
/* IN/OUT packets mean we're in the DATA or STATUS stage.
/* IN/OUT packets mean we're in the DATA or STATUS stage.
* This driver uses only uses protocol stalls (ep0 never halts),
* and if we got this far the gadget driver already had a
* chance to stall. Tries to be forgiving of host oddities.
@ -1509,7 +1550,7 @@ static void ep0_irq(struct omap_udc *udc, u16 irq_src)
} else if (stat == 0)
UDC_CTRL_REG = UDC_SET_FIFO_EN;
UDC_EP_NUM_REG = 0;
/* activate status stage */
if (stat == 1) {
done(ep0, req, 0);
@ -1866,7 +1907,7 @@ static void pio_out_timer(unsigned long _ep)
spin_lock_irqsave(&ep->udc->lock, flags);
if (!list_empty(&ep->queue) && ep->ackwait) {
use_ep(ep, 0);
use_ep(ep, UDC_EP_SEL);
stat_flg = UDC_STAT_FLG_REG;
if ((stat_flg & UDC_ACK) && (!(stat_flg & UDC_FIFO_EN)
@ -1876,12 +1917,12 @@ static void pio_out_timer(unsigned long _ep)
VDBG("%s: lose, %04x\n", ep->ep.name, stat_flg);
req = container_of(ep->queue.next,
struct omap_req, queue);
UDC_EP_NUM_REG = ep->bEndpointAddress | UDC_EP_SEL;
(void) read_fifo(ep, req);
UDC_EP_NUM_REG = ep->bEndpointAddress;
UDC_CTRL_REG = UDC_SET_FIFO_EN;
ep->ackwait = 1 + ep->double_buf;
}
} else
deselect_ep();
}
mod_timer(&ep->timer, PIO_OUT_TIMEOUT);
spin_unlock_irqrestore(&ep->udc->lock, flags);
@ -2028,7 +2069,17 @@ static irqreturn_t omap_udc_iso_irq(int irq, void *_dev)
/*-------------------------------------------------------------------------*/
static struct omap_udc *udc;
static inline int machine_needs_vbus_session(void)
{
return (machine_is_omap_innovator()
|| machine_is_omap_osk()
|| machine_is_omap_apollon()
#ifndef CONFIG_MACH_OMAP_H4_OTG
|| machine_is_omap_h4()
#endif
|| machine_is_sx1()
);
}
int usb_gadget_register_driver (struct usb_gadget_driver *driver)
{
@ -2070,6 +2121,9 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
udc->gadget.dev.driver = &driver->driver;
spin_unlock_irqrestore(&udc->lock, flags);
if (udc->dc_clk != NULL)
omap_udc_enable_clock(1);
status = driver->bind (&udc->gadget);
if (status) {
DBG("bind to %s --> %d\n", driver->driver.name, status);
@ -2103,10 +2157,12 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
/* boards that don't have VBUS sensing can't autogate 48MHz;
* can't enter deep sleep while a gadget driver is active.
*/
if (machine_is_omap_innovator() || machine_is_omap_osk())
if (machine_needs_vbus_session())
omap_vbus_session(&udc->gadget, 1);
done:
if (udc->dc_clk != NULL)
omap_udc_enable_clock(0);
return status;
}
EXPORT_SYMBOL(usb_gadget_register_driver);
@ -2121,7 +2177,10 @@ int usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
if (!driver || driver != udc->driver || !driver->unbind)
return -EINVAL;
if (machine_is_omap_innovator() || machine_is_omap_osk())
if (udc->dc_clk != NULL)
omap_udc_enable_clock(1);
if (machine_needs_vbus_session())
omap_vbus_session(&udc->gadget, 0);
if (udc->transceiver)
@ -2137,6 +2196,8 @@ int usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
udc->gadget.dev.driver = NULL;
udc->driver = NULL;
if (udc->dc_clk != NULL)
omap_udc_enable_clock(0);
DBG("unregistered driver '%s'\n", driver->driver.name);
return status;
}
@ -2219,7 +2280,7 @@ static char *trx_mode(unsigned m, int enabled)
case 0: return enabled ? "*6wire" : "unused";
case 1: return "4wire";
case 2: return "3wire";
case 3: return "6wire";
case 3: return "6wire";
default: return "unknown";
}
}
@ -2228,11 +2289,18 @@ static int proc_otg_show(struct seq_file *s)
{
u32 tmp;
u32 trans;
char *ctrl_name;
tmp = OTG_REV_REG;
trans = USB_TRANSCEIVER_CTRL_REG;
seq_printf(s, "\nOTG rev %d.%d, transceiver_ctrl %05x\n",
tmp >> 4, tmp & 0xf, trans);
if (cpu_is_omap24xx()) {
ctrl_name = "control_devconf";
trans = CONTROL_DEVCONF_REG;
} else {
ctrl_name = "tranceiver_ctrl";
trans = USB_TRANSCEIVER_CTRL_REG;
}
seq_printf(s, "\nOTG rev %d.%d, %s %05x\n",
tmp >> 4, tmp & 0xf, ctrl_name, trans);
tmp = OTG_SYSCON_1_REG;
seq_printf(s, "otg_syscon1 %08x usb2 %s, usb1 %s, usb0 %s,"
FOURBITS "\n", tmp,
@ -2307,7 +2375,7 @@ static int proc_udc_show(struct seq_file *s, void *_)
driver_desc,
use_dma ? " (dma)" : "");
tmp = UDC_REV_REG & 0xff;
tmp = UDC_REV_REG & 0xff;
seq_printf(s,
"UDC rev %d.%d, fifo mode %d, gadget %s\n"
"hmc %d, transceiver %s\n",
@ -2315,11 +2383,16 @@ static int proc_udc_show(struct seq_file *s, void *_)
fifo_mode,
udc->driver ? udc->driver->driver.name : "(none)",
HMC,
udc->transceiver ? udc->transceiver->label : "(none)");
seq_printf(s, "ULPD control %04x req %04x status %04x\n",
__REG16(ULPD_CLOCK_CTRL),
__REG16(ULPD_SOFT_REQ),
__REG16(ULPD_STATUS_REQ));
udc->transceiver
? udc->transceiver->label
: ((cpu_is_omap1710() || cpu_is_omap24xx())
? "external" : "(none)"));
if (cpu_class_is_omap1()) {
seq_printf(s, "ULPD control %04x req %04x status %04x\n",
__REG16(ULPD_CLOCK_CTRL),
__REG16(ULPD_SOFT_REQ),
__REG16(ULPD_STATUS_REQ));
}
/* OTG controller registers */
if (!cpu_is_omap15xx())
@ -2504,9 +2577,10 @@ omap_ep_setup(char *name, u8 addr, u8 type,
dbuf = 1;
} else {
/* double-buffering "not supported" on 15xx,
* and ignored for PIO-IN on 16xx
* and ignored for PIO-IN on newer chips
* (for more reliable behavior)
*/
if (!use_dma || cpu_is_omap15xx())
if (!use_dma || cpu_is_omap15xx() || cpu_is_omap24xx())
dbuf = 0;
switch (maxp) {
@ -2549,7 +2623,7 @@ omap_ep_setup(char *name, u8 addr, u8 type,
ep->bEndpointAddress = addr;
ep->bmAttributes = type;
ep->double_buf = dbuf;
ep->udc = udc;
ep->udc = udc;
ep->ep.name = ep->name;
ep->ep.ops = &omap_ep_ops;
@ -2709,15 +2783,37 @@ static int __init omap_udc_probe(struct platform_device *pdev)
struct otg_transceiver *xceiv = NULL;
const char *type = NULL;
struct omap_usb_config *config = pdev->dev.platform_data;
struct clk *dc_clk;
struct clk *hhc_clk;
/* NOTE: "knows" the order of the resources! */
if (!request_mem_region(pdev->resource[0].start,
if (!request_mem_region(pdev->resource[0].start,
pdev->resource[0].end - pdev->resource[0].start + 1,
driver_name)) {
DBG("request_mem_region failed\n");
return -EBUSY;
}
if (cpu_is_omap16xx()) {
dc_clk = clk_get(&pdev->dev, "usb_dc_ck");
hhc_clk = clk_get(&pdev->dev, "usb_hhc_ck");
BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
/* can't use omap_udc_enable_clock yet */
clk_enable(dc_clk);
clk_enable(hhc_clk);
udelay(100);
}
if (cpu_is_omap24xx()) {
dc_clk = clk_get(&pdev->dev, "usb_fck");
hhc_clk = clk_get(&pdev->dev, "usb_l4_ick");
BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
/* can't use omap_udc_enable_clock yet */
clk_enable(dc_clk);
clk_enable(hhc_clk);
udelay(100);
}
INFO("OMAP UDC rev %d.%d%s\n",
UDC_REV_REG >> 4, UDC_REV_REG & 0xf,
config->otg ? ", Mini-AB" : "");
@ -2727,7 +2823,7 @@ static int __init omap_udc_probe(struct platform_device *pdev)
hmc = HMC_1510;
type = "(unknown)";
if (machine_is_omap_innovator()) {
if (machine_is_omap_innovator() || machine_is_sx1()) {
/* just set up software VBUS detect, and then
* later rig it so we always report VBUS.
* FIXME without really sensing VBUS, we can't
@ -2756,6 +2852,15 @@ static int __init omap_udc_probe(struct platform_device *pdev)
}
hmc = HMC_1610;
if (cpu_is_omap24xx()) {
/* this could be transceiverless in one of the
* "we don't need to know" modes.
*/
type = "external";
goto known;
}
switch (hmc) {
case 0: /* POWERUP DEFAULT == 0 */
case 4:
@ -2794,6 +2899,7 @@ bad_on_1710:
goto cleanup0;
}
}
known:
INFO("hmc mode %d, %s transceiver\n", hmc, type);
/* a "gadget" abstracts/virtualizes the controller */
@ -2818,8 +2924,8 @@ bad_on_1710:
status = request_irq(pdev->resource[1].start, omap_udc_irq,
IRQF_SAMPLE_RANDOM, driver_name, udc);
if (status != 0) {
ERR( "can't get irq %ld, err %d\n",
pdev->resource[1].start, status);
ERR("can't get irq %d, err %d\n",
(int) pdev->resource[1].start, status);
goto cleanup1;
}
@ -2827,24 +2933,41 @@ bad_on_1710:
status = request_irq(pdev->resource[2].start, omap_udc_pio_irq,
IRQF_SAMPLE_RANDOM, "omap_udc pio", udc);
if (status != 0) {
ERR( "can't get irq %ld, err %d\n",
pdev->resource[2].start, status);
ERR("can't get irq %d, err %d\n",
(int) pdev->resource[2].start, status);
goto cleanup2;
}
#ifdef USE_ISO
status = request_irq(pdev->resource[3].start, omap_udc_iso_irq,
IRQF_DISABLED, "omap_udc iso", udc);
if (status != 0) {
ERR("can't get irq %ld, err %d\n",
pdev->resource[3].start, status);
ERR("can't get irq %d, err %d\n",
(int) pdev->resource[3].start, status);
goto cleanup3;
}
#endif
if (cpu_is_omap16xx()) {
udc->dc_clk = dc_clk;
udc->hhc_clk = hhc_clk;
clk_disable(hhc_clk);
clk_disable(dc_clk);
}
if (cpu_is_omap24xx()) {
udc->dc_clk = dc_clk;
udc->hhc_clk = hhc_clk;
/* FIXME OMAP2 don't release hhc & dc clock */
#if 0
clk_disable(hhc_clk);
clk_disable(dc_clk);
#endif
}
create_proc_file();
device_add(&udc->gadget.dev);
return 0;
status = device_add(&udc->gadget.dev);
if (!status)
return status;
/* If fail, fall through */
#ifdef USE_ISO
cleanup3:
free_irq(pdev->resource[2].start, udc);
@ -2860,8 +2983,17 @@ cleanup1:
cleanup0:
if (xceiv)
put_device(xceiv->dev);
if (cpu_is_omap16xx() || cpu_is_omap24xx()) {
clk_disable(hhc_clk);
clk_disable(dc_clk);
clk_put(hhc_clk);
clk_put(dc_clk);
}
release_mem_region(pdev->resource[0].start,
pdev->resource[0].end - pdev->resource[0].start + 1);
return status;
}
@ -2891,6 +3023,13 @@ static int __exit omap_udc_remove(struct platform_device *pdev)
free_irq(pdev->resource[2].start, udc);
free_irq(pdev->resource[1].start, udc);
if (udc->dc_clk) {
if (udc->clk_requested)
omap_udc_enable_clock(0);
clk_put(udc->hhc_clk);
clk_put(udc->dc_clk);
}
release_mem_region(pdev->resource[0].start,
pdev->resource[0].end - pdev->resource[0].start + 1);

3
drivers/usb/gadget/omap_udc.h
View File

@ -175,6 +175,9 @@ struct omap_udc {
unsigned ep0_reset_config:1;
unsigned ep0_setup:1;
struct completion *done;
struct clk *dc_clk;
struct clk *hhc_clk;
unsigned clk_requested:1;
};
/*-------------------------------------------------------------------------*/