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usb: musb: add ulpi access operations

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This adds helper functions for ULPI access, and implements
otg_io_access_ops for musb.

Signed-off-by: Heikki Krogerus <ext-heikki.krogerus@nokia.com>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Heikki Krogerus 2010-03-25 13:25:28 +02:00 committed by Greg Kroah-Hartman
parent 58815fa3bf
commit ffb865b1e4
2 changed files with 96 additions and 0 deletions
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86
drivers/usb/musb/musb_core.c
View File

@ -149,6 +149,87 @@ static inline struct musb *dev_to_musb(struct device *dev)
/*-------------------------------------------------------------------------*/
#ifndef CONFIG_BLACKFIN
static int musb_ulpi_read(struct otg_transceiver *otg, u32 offset)
{
void __iomem *addr = otg->io_priv;
int i = 0;
u8 r;
u8 power;
/* Make sure the transceiver is not in low power mode */
power = musb_readb(addr, MUSB_POWER);
power &= ~MUSB_POWER_SUSPENDM;
musb_writeb(addr, MUSB_POWER, power);
/* REVISIT: musbhdrc_ulpi_an.pdf recommends setting the
* ULPICarKitControlDisableUTMI after clearing POWER_SUSPENDM.
*/
musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset);
musb_writeb(addr, MUSB_ULPI_REG_CONTROL,
MUSB_ULPI_REG_REQ | MUSB_ULPI_RDN_WR);
while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL)
& MUSB_ULPI_REG_CMPLT)) {
i++;
if (i == 10000) {
DBG(3, "ULPI read timed out\n");
return -ETIMEDOUT;
}
}
r = musb_readb(addr, MUSB_ULPI_REG_CONTROL);
r &= ~MUSB_ULPI_REG_CMPLT;
musb_writeb(addr, MUSB_ULPI_REG_CONTROL, r);
return musb_readb(addr, MUSB_ULPI_REG_DATA);
}
static int musb_ulpi_write(struct otg_transceiver *otg,
u32 offset, u32 data)
{
void __iomem *addr = otg->io_priv;
int i = 0;
u8 r = 0;
u8 power;
/* Make sure the transceiver is not in low power mode */
power = musb_readb(addr, MUSB_POWER);
power &= ~MUSB_POWER_SUSPENDM;
musb_writeb(addr, MUSB_POWER, power);
musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset);
musb_writeb(addr, MUSB_ULPI_REG_DATA, (u8)data);
musb_writeb(addr, MUSB_ULPI_REG_CONTROL, MUSB_ULPI_REG_REQ);
while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL)
& MUSB_ULPI_REG_CMPLT)) {
i++;
if (i == 10000) {
DBG(3, "ULPI write timed out\n");
return -ETIMEDOUT;
}
}
r = musb_readb(addr, MUSB_ULPI_REG_CONTROL);
r &= ~MUSB_ULPI_REG_CMPLT;
musb_writeb(addr, MUSB_ULPI_REG_CONTROL, r);
return 0;
}
#else
#define musb_ulpi_read(a, b) NULL
#define musb_ulpi_write(a, b, c) NULL
#endif
static struct otg_io_access_ops musb_ulpi_access = {
.read = musb_ulpi_read,
.write = musb_ulpi_write,
};
/*-------------------------------------------------------------------------*/
#if !defined(CONFIG_USB_TUSB6010) && !defined(CONFIG_BLACKFIN)
/*
@ -1954,6 +2035,11 @@ bad_config:
goto fail3;
}
if (!musb->xceiv->io_ops) {
musb->xceiv->io_priv = musb->mregs;
musb->xceiv->io_ops = &musb_ulpi_access;
}
#ifndef CONFIG_MUSB_PIO_ONLY
if (use_dma && dev->dma_mask) {
struct dma_controller *c;

10
drivers/usb/musb/musb_regs.h
View File

@ -75,6 +75,10 @@
/* MUSB ULPI VBUSCONTROL */
#define MUSB_ULPI_USE_EXTVBUS 0x01
#define MUSB_ULPI_USE_EXTVBUSIND 0x02
/* ULPI_REG_CONTROL */
#define MUSB_ULPI_REG_REQ (1 << 0)
#define MUSB_ULPI_REG_CMPLT (1 << 1)
#define MUSB_ULPI_RDN_WR (1 << 2)
/* TESTMODE */
#define MUSB_TEST_FORCE_HOST 0x80
@ -251,6 +255,12 @@
/* REVISIT: vctrl/vstatus: optional vendor utmi+phy register at 0x68 */
#define MUSB_HWVERS 0x6C /* 8 bit */
#define MUSB_ULPI_BUSCONTROL 0x70 /* 8 bit */
#define MUSB_ULPI_INT_MASK 0x72 /* 8 bit */
#define MUSB_ULPI_INT_SRC 0x73 /* 8 bit */
#define MUSB_ULPI_REG_DATA 0x74 /* 8 bit */
#define MUSB_ULPI_REG_ADDR 0x75 /* 8 bit */
#define MUSB_ULPI_REG_CONTROL 0x76 /* 8 bit */
#define MUSB_ULPI_RAW_DATA 0x77 /* 8 bit */
#define MUSB_EPINFO 0x78 /* 8 bit */
#define MUSB_RAMINFO 0x79 /* 8 bit */