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[PATCH] USB: more omap_udc updates (dma and omap1710) 

More omap_udc updates:

  * OMAP 1710 updates
      - new UDC bit for clearing endpoint toggle, affecting CLEAR_HALT
      - new OTG bits affecting wakeup
  * Fix the bug Vladimir noted, that IN-DMA transfer code path kicks in
    for under 1024 bytes (not "up to 1024 bytes")
  * Handle transceiver setup more intelligently
      - use transceiver whenever one's available; this can be handy
        for GPIO based, loopback, or transceiverless configs
      - cleanup correctly after the "unrecognized HMC" case
  * DMA performance tweaks
      - allow burst/pack for memory access
      - use 16 bit DMA access most of the time on TIPB
  * Add workarounds for some DMA errata (not observed "in the wild"):
      - DMA CSAC/CDAC reads returning zero
      - RX/TX DMA config registers bit 12 always reads as zero (TI patch)
  * More "sparse" warnings removed, notably "changing" the SETUP packet
    to return data in USB byteorder (an API change, null effect on OMAP
    except for these warnings).

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 2005-04-28 13:52:31 -07:00 committed by Greg Kroah-Hartman
parent 907cba35f7
commit 65111084c6
3 changed files with 125 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

153
drivers/usb/gadget/omap_udc.c
View File

@ -166,7 +166,7 @@ static int omap_ep_enable(struct usb_ep *_ep,
maxp = le16_to_cpu (desc->wMaxPacketSize);
if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
&& maxp != ep->maxpacket)
|| desc->wMaxPacketSize > ep->maxpacket
|| le16_to_cpu(desc->wMaxPacketSize) > ep->maxpacket
|| !desc->wMaxPacketSize) {
DBG("%s, bad %s maxpacket\n", __FUNCTION__, _ep->name);
return -ERANGE;
@ -213,7 +213,7 @@ static int omap_ep_enable(struct usb_ep *_ep,
ep->has_dma = 0;
ep->lch = -1;
use_ep(ep, UDC_EP_SEL);
UDC_CTRL_REG = UDC_RESET_EP;
UDC_CTRL_REG = udc->clr_halt;
ep->ackwait = 0;
deselect_ep();
@ -537,6 +537,32 @@ static int read_fifo(struct omap_ep *ep, struct omap_req *req)
/*-------------------------------------------------------------------------*/
static inline dma_addr_t dma_csac(unsigned lch)
{
dma_addr_t csac;
/* 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));
if (csac == 0)
csac = omap_readw(OMAP_DMA_CSAC(lch));
return csac;
}
static inline dma_addr_t dma_cdac(unsigned lch)
{
dma_addr_t cdac;
/* 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));
if (cdac == 0)
cdac = omap_readw(OMAP_DMA_CDAC(lch));
return cdac;
}
static u16 dma_src_len(struct omap_ep *ep, dma_addr_t start)
{
dma_addr_t end;
@ -547,7 +573,7 @@ static u16 dma_src_len(struct omap_ep *ep, dma_addr_t start)
if (cpu_is_omap15xx())
return 0;
end = omap_readw(OMAP_DMA_CSAC(ep->lch));
end = dma_csac(ep->lch);
if (end == ep->dma_counter)
return 0;
@ -558,14 +584,14 @@ static u16 dma_src_len(struct omap_ep *ep, dma_addr_t start)
}
#define DMA_DEST_LAST(x) (cpu_is_omap15xx() \
? OMAP_DMA_CSAC(x) /* really: CPC */ \
: OMAP_DMA_CDAC(x))
? omap_readw(OMAP_DMA_CSAC(x)) /* really: CPC */ \
: dma_cdac(x))
static u16 dma_dest_len(struct omap_ep *ep, dma_addr_t start)
{
dma_addr_t end;
end = omap_readw(DMA_DEST_LAST(ep->lch));
end = DMA_DEST_LAST(ep->lch);
if (end == ep->dma_counter)
return 0;
@ -592,7 +618,7 @@ static void next_in_dma(struct omap_ep *ep, struct omap_req *req)
: OMAP_DMA_SYNC_ELEMENT;
/* measure length in either bytes or packets */
if ((cpu_is_omap16xx() && length <= (UDC_TXN_TSC + 1))
if ((cpu_is_omap16xx() && length <= UDC_TXN_TSC)
|| (cpu_is_omap15xx() && length < ep->maxpacket)) {
txdma_ctrl = UDC_TXN_EOT | length;
omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S8,
@ -601,15 +627,15 @@ static void next_in_dma(struct omap_ep *ep, struct omap_req *req)
length = min(length / ep->maxpacket,
(unsigned) UDC_TXN_TSC + 1);
txdma_ctrl = length;
omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S8,
ep->ep.maxpacket, length, sync_mode);
omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S16,
ep->ep.maxpacket >> 1, length, sync_mode);
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_start_dma(ep->lch);
ep->dma_counter = omap_readw(OMAP_DMA_CSAC(ep->lch));
ep->dma_counter = dma_csac(ep->lch);
UDC_DMA_IRQ_EN_REG |= UDC_TX_DONE_IE(ep->dma_channel);
UDC_TXDMA_REG(ep->dma_channel) = UDC_TXN_START | txdma_ctrl;
req->dma_bytes = length;
@ -649,12 +675,12 @@ static void next_out_dma(struct omap_ep *ep, struct omap_req *req)
packets = (req->req.length - req->req.actual) / ep->ep.maxpacket;
packets = min(packets, (unsigned)UDC_RXN_TC + 1);
req->dma_bytes = packets * ep->ep.maxpacket;
omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S8,
ep->ep.maxpacket, packets,
omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S16,
ep->ep.maxpacket >> 1, packets,
OMAP_DMA_SYNC_ELEMENT);
omap_set_dma_dest_params(ep->lch, OMAP_DMA_PORT_EMIFF,
OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual);
ep->dma_counter = omap_readw(DMA_DEST_LAST(ep->lch));
ep->dma_counter = DMA_DEST_LAST(ep->lch);
UDC_RXDMA_REG(ep->dma_channel) = UDC_RXN_STOP | (packets - 1);
UDC_DMA_IRQ_EN_REG |= UDC_RX_EOT_IE(ep->dma_channel);
@ -762,7 +788,7 @@ static void dma_channel_claim(struct omap_ep *ep, unsigned channel)
reg = UDC_TXDMA_CFG_REG;
else
reg = UDC_RXDMA_CFG_REG;
reg |= 1 << 12; /* "pulse" activated */
reg |= UDC_DMA_REQ; /* "pulse" activated */
ep->dma_channel = 0;
ep->lch = -1;
@ -786,6 +812,11 @@ static void dma_channel_claim(struct omap_ep *ep, unsigned channel)
ep->ep.name, dma_error, ep, &ep->lch);
if (status == 0) {
UDC_TXDMA_CFG_REG = reg;
/* EMIFF */
omap_set_dma_src_burst_mode(ep->lch,
OMAP_DMA_DATA_BURST_4);
omap_set_dma_src_data_pack(ep->lch, 1);
/* TIPB */
omap_set_dma_dest_params(ep->lch,
OMAP_DMA_PORT_TIPB,
OMAP_DMA_AMODE_CONSTANT,
@ -796,10 +827,15 @@ static void dma_channel_claim(struct omap_ep *ep, unsigned channel)
ep->ep.name, dma_error, ep, &ep->lch);
if (status == 0) {
UDC_RXDMA_CFG_REG = reg;
/* TIPB */
omap_set_dma_src_params(ep->lch,
OMAP_DMA_PORT_TIPB,
OMAP_DMA_AMODE_CONSTANT,
(unsigned long) io_v2p((u32)&UDC_DATA_DMA_REG));
/* EMIFF */
omap_set_dma_dest_burst_mode(ep->lch,
OMAP_DMA_DATA_BURST_4);
omap_set_dma_dest_data_pack(ep->lch, 1);
}
}
if (status)
@ -864,9 +900,13 @@ static void dma_channel_release(struct omap_ep *ep)
(ep->bEndpointAddress & USB_DIR_IN) ? 't' : 'r',
ep->dma_channel - 1, req);
/* NOTE: re-setting RX_REQ/TX_REQ because of a chip bug (before
* OMAP 1710 ES2.0) where reading the DMA_CFG can clear them.
*/
/* wait till current packet DMA finishes, and fifo empties */
if (ep->bEndpointAddress & USB_DIR_IN) {
UDC_TXDMA_CFG_REG &= ~mask;
UDC_TXDMA_CFG_REG = (UDC_TXDMA_CFG_REG & ~mask) | UDC_DMA_REQ;
if (req) {
finish_in_dma(ep, req, -ECONNRESET);
@ -879,7 +919,7 @@ static void dma_channel_release(struct omap_ep *ep)
while (UDC_TXDMA_CFG_REG & mask)
udelay(10);
} else {
UDC_RXDMA_CFG_REG &= ~mask;
UDC_RXDMA_CFG_REG = (UDC_RXDMA_CFG_REG & ~mask) | UDC_DMA_REQ;
/* dma empties the fifo */
while (UDC_RXDMA_CFG_REG & mask)
@ -1140,7 +1180,7 @@ static int omap_ep_set_halt(struct usb_ep *_ep, int value)
dma_channel_claim(ep, channel);
} else {
use_ep(ep, 0);
UDC_CTRL_REG = UDC_RESET_EP;
UDC_CTRL_REG = ep->udc->clr_halt;
ep->ackwait = 0;
if (!(ep->bEndpointAddress & USB_DIR_IN)) {
UDC_CTRL_REG = UDC_SET_FIFO_EN;
@ -1514,6 +1554,10 @@ static void ep0_irq(struct omap_udc *udc, u16 irq_src)
UDC_EP_NUM_REG = 0;
} while (UDC_IRQ_SRC_REG & UDC_SETUP);
#define w_value le16_to_cpup (&u.r.wValue)
#define w_index le16_to_cpup (&u.r.wIndex)
#define w_length le16_to_cpup (&u.r.wLength)
/* Delegate almost all control requests to the gadget driver,
* except for a handful of ch9 status/feature requests that
* hardware doesn't autodecode _and_ the gadget API hides.
@ -1528,11 +1572,11 @@ static void ep0_irq(struct omap_udc *udc, u16 irq_src)
/* udc needs to know when ep != 0 is valid */
if (u.r.bRequestType != USB_RECIP_DEVICE)
goto delegate;
if (u.r.wLength != 0)
if (w_length != 0)
goto do_stall;
udc->ep0_set_config = 1;
udc->ep0_reset_config = (u.r.wValue == 0);
VDBG("set config %d\n", u.r.wValue);
udc->ep0_reset_config = (w_value == 0);
VDBG("set config %d\n", w_value);
/* update udc NOW since gadget driver may start
* queueing requests immediately; clear config
@ -1548,18 +1592,18 @@ static void ep0_irq(struct omap_udc *udc, u16 irq_src)
/* clear endpoint halt */
if (u.r.bRequestType != USB_RECIP_ENDPOINT)
goto delegate;
if (u.r.wValue != USB_ENDPOINT_HALT
|| u.r.wLength != 0)
if (w_value != USB_ENDPOINT_HALT
|| w_length != 0)
goto do_stall;
ep = &udc->ep[u.r.wIndex & 0xf];
ep = &udc->ep[w_index & 0xf];
if (ep != ep0) {
if (u.r.wIndex & USB_DIR_IN)
if (w_index & USB_DIR_IN)
ep += 16;
if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
|| !ep->desc)
goto do_stall;
use_ep(ep, 0);
UDC_CTRL_REG = UDC_RESET_EP;
UDC_CTRL_REG = udc->clr_halt;
ep->ackwait = 0;
if (!(ep->bEndpointAddress & USB_DIR_IN)) {
UDC_CTRL_REG = UDC_SET_FIFO_EN;
@ -1577,11 +1621,11 @@ static void ep0_irq(struct omap_udc *udc, u16 irq_src)
/* set endpoint halt */
if (u.r.bRequestType != USB_RECIP_ENDPOINT)
goto delegate;
if (u.r.wValue != USB_ENDPOINT_HALT
|| u.r.wLength != 0)
if (w_value != USB_ENDPOINT_HALT
|| w_length != 0)
goto do_stall;
ep = &udc->ep[u.r.wIndex & 0xf];
if (u.r.wIndex & USB_DIR_IN)
ep = &udc->ep[w_index & 0xf];
if (w_index & USB_DIR_IN)
ep += 16;
if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
|| ep == ep0 || !ep->desc)
@ -1619,13 +1663,13 @@ ep0out_status_stage:
UDC_CTRL_REG = UDC_SET_FIFO_EN;
UDC_EP_NUM_REG = UDC_EP_DIR;
status = 0;
VDBG("GET_STATUS, interface %d\n", u.r.wIndex);
VDBG("GET_STATUS, interface %d\n", w_index);
/* next, status stage */
break;
default:
delegate:
/* activate the ep0out fifo right away */
if (!udc->ep0_in && u.r.wLength) {
if (!udc->ep0_in && w_length) {
UDC_EP_NUM_REG = 0;
UDC_CTRL_REG = UDC_SET_FIFO_EN;
}
@ -1636,7 +1680,11 @@ delegate:
*/
VDBG("SETUP %02x.%02x v%04x i%04x l%04x\n",
u.r.bRequestType, u.r.bRequest,
u.r.wValue, u.r.wIndex, u.r.wLength);
w_value, w_index, w_length);
#undef w_value
#undef w_index
#undef w_length
/* The gadget driver may return an error here,
* causing an immediate protocol stall.
@ -2181,14 +2229,14 @@ static int proc_otg_show(struct seq_file *s)
tmp = OTG_REV_REG;
trans = USB_TRANSCEIVER_CTRL_REG;
seq_printf(s, "\nOTG rev %d.%d, transceiver_ctrl %03x\n",
seq_printf(s, "\nOTG rev %d.%d, transceiver_ctrl %05x\n",
tmp >> 4, tmp & 0xf, trans);
tmp = OTG_SYSCON_1_REG;
seq_printf(s, "otg_syscon1 %08x usb2 %s, usb1 %s, usb0 %s,"
FOURBITS "\n", tmp,
trx_mode(USB2_TRX_MODE(tmp), trans & CONF_USB2_UNI_R),
trx_mode(USB1_TRX_MODE(tmp), trans & CONF_USB1_UNI_R),
(USB0_TRX_MODE(tmp) == 0)
(USB0_TRX_MODE(tmp) == 0 && !cpu_is_omap1710())
? "internal"
: trx_mode(USB0_TRX_MODE(tmp), 1),
(tmp & OTG_IDLE_EN) ? " !otg" : "",
@ -2418,6 +2466,10 @@ static inline void remove_proc_file(void) {}
/* Before this controller can enumerate, we need to pick an endpoint
* configuration, or "fifo_mode" That involves allocating 2KB of packet
* buffer space among the endpoints we'll be operating.
*
* NOTE: as of OMAP 1710 ES2.0, writing a new endpoint config when
* UDC_SYSCON_1_REG.CFG_LOCK is set can now work. We won't use that
* capability yet though.
*/
static unsigned __init
omap_ep_setup(char *name, u8 addr, u8 type,
@ -2690,6 +2742,19 @@ static int __init omap_udc_probe(struct device *dev)
FUNC_MUX_CTRL_0_REG = tmp;
}
} else {
/* The transceiver may package some GPIO logic or handle
* loopback and/or transceiverless setup; if we find one,
* use it. Except for OTG, we don't _need_ to talk to one;
* but not having one probably means no VBUS detection.
*/
xceiv = otg_get_transceiver();
if (xceiv)
type = xceiv->label;
else if (config->otg) {
DBG("OTG requires external transceiver!\n");
goto cleanup0;
}
hmc = HMC_1610;
switch (hmc) {
case 0: /* POWERUP DEFAULT == 0 */
@ -2706,25 +2771,27 @@ static int __init omap_udc_probe(struct device *dev)
case 16:
case 19:
case 25:
xceiv = otg_get_transceiver();
if (!xceiv) {
DBG("external transceiver not registered!\n");
if (config->otg)
goto cleanup0;
type = "unknown";
} else
type = xceiv->label;
}
break;
case 21: /* internal loopback */
type = "loopback";
break;
case 14: /* transceiverless */
if (cpu_is_omap1710())
goto bad_on_1710;
/* FALL THROUGH */
case 13:
case 15:
type = "no";
break;
default:
bad_on_1710:
ERR("unrecognized UDC HMC mode %d\n", hmc);
return -ENODEV;
goto cleanup0;
}
}
INFO("hmc mode %d, %s transceiver\n", hmc, type);
@ -2741,6 +2808,12 @@ static int __init omap_udc_probe(struct device *dev)
udc->gadget.is_otg = (config->otg != 0);
#endif
/* starting with omap1710 es2.0, clear toggle is a separate bit */
if (UDC_REV_REG >= 0x61)
udc->clr_halt = UDC_RESET_EP | UDC_CLRDATA_TOGGLE;
else
udc->clr_halt = UDC_RESET_EP;
/* USB general purpose IRQ: ep0, state changes, dma, etc */
status = request_irq(odev->resource[1].start, omap_udc_irq,
SA_SAMPLE_RANDOM, driver_name, udc);

4
drivers/usb/gadget/omap_udc.h
View File

@ -20,6 +20,7 @@
#define UDC_CTRL_REG UDC_REG(0x0C) /* Endpoint control */
# define UDC_CLR_HALT (1 << 7)
# define UDC_SET_HALT (1 << 6)
# define UDC_CLRDATA_TOGGLE (1 << 3)
# define UDC_SET_FIFO_EN (1 << 2)
# define UDC_CLR_EP (1 << 1)
# define UDC_RESET_EP (1 << 0)
@ -99,6 +100,7 @@
/* DMA configuration registers: up to three channels in each direction. */
#define UDC_RXDMA_CFG_REG UDC_REG(0x40) /* 3 eps for RX DMA */
# define UDC_DMA_REQ (1 << 12)
#define UDC_TXDMA_CFG_REG UDC_REG(0x44) /* 3 eps for TX DMA */
#define UDC_DATA_DMA_REG UDC_REG(0x48) /* rx/tx fifo addr */
@ -162,6 +164,7 @@ struct omap_udc {
spinlock_t lock;
struct omap_ep ep[32];
u16 devstat;
u16 clr_halt;
struct otg_transceiver *transceiver;
struct list_head iso;
unsigned softconnect:1;
@ -171,7 +174,6 @@ struct omap_udc {
unsigned ep0_set_config:1;
unsigned ep0_reset_config:1;
unsigned ep0_setup:1;
struct completion *done;
};

9
include/asm-arm/arch-omap/usb.h
View File

@ -47,6 +47,15 @@
# define HMC_TLLATTACH (1 << 6)
# define OTG_HMC(w) (((w)>>0)&0x3f)
#define OTG_CTRL_REG OTG_REG32(0x0c)
# define OTG_USB2_EN (1 << 29)
# define OTG_USB2_DP (1 << 28)
# define OTG_USB2_DM (1 << 27)
# define OTG_USB1_EN (1 << 26)
# define OTG_USB1_DP (1 << 25)
# define OTG_USB1_DM (1 << 24)
# define OTG_USB0_EN (1 << 23)
# define OTG_USB0_DP (1 << 22)
# define OTG_USB0_DM (1 << 21)
# define OTG_ASESSVLD (1 << 20)
# define OTG_BSESSEND (1 << 19)
# define OTG_BSESSVLD (1 << 18)