void
imxusb_ulpi_write(struct imxehci_softc *sc, int addr, uint8_t data)
{
uint32_t reg;
ulpi_wakeup(sc, TIMEOUT);
reg = ULPI_RUN | ULPI_RW | __SHIFTIN(addr, ULPI_ADDR) | __SHIFTIN(data, ULPI_DATWR);
bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, reg);
ulpi_wait(sc, TIMEOUT);
return;
}
uint8_t
imxusb_ulpi_read(struct imxehci_softc *sc, int addr)
{
uint32_t data;
ulpi_wakeup(sc, TIMEOUT);
data = ULPI_RUN | __SHIFTIN(addr, ULPI_ADDR);
bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, data);
data = ulpi_wait(sc, TIMEOUT);
return __SHIFTOUT(data, ULPI_DATRD);
}
/*
* Wake the ULPI PHY up for communication
*
* returns 0 on success.
*/
static int ulpi_wakeup(struct ulpi_viewport *ulpi_vp)
{
int err;
if (readl(ulpi_vp->viewport_addr) & ULPI_SS)
return 0; /* already awake */
writel(ULPI_WU, ulpi_vp->viewport_addr);
err = ulpi_wait(ulpi_vp, ULPI_WU);
if (err)
printf("ULPI wakeup timed out\n");
return err;
}
/*
* Wake the ULPI PHY up for communication
*
* returns 0 on success.
*/
static int ulpi_wakeup(struct ulpi_viewport *ulpi_vp)
{
int err;
if (readl(ulpi_vp->viewport_addr) & OMAP_ULPI_ACCESS)
return 0; /* already awake */
writel(OMAP_ULPI_ACCESS, ulpi_vp->viewport_addr);
err = ulpi_wait(ulpi_vp, OMAP_ULPI_ACCESS);
if (err)
debug("ULPI wakeup timed out\n");
return err;
}
/*
* Issue a ULPI read/write request
*
* @value - the ULPI request
*/
static int ulpi_request(struct ulpi_viewport *ulpi_vp, u32 value)
{
int err;
err = ulpi_wakeup(ulpi_vp);
if (err)
return err;
writel(value, ulpi_vp->viewport_addr);
err = ulpi_wait(ulpi_vp, ULPI_RWRUN);
if (err)
printf("ULPI request timed out\n");
return err;
}
/*
* Issue a ULPI read/write request
*/
static int ulpi_request(struct ulpi_viewport *ulpi_vp, u32 value)
{
int err;
err = ulpi_wakeup(ulpi_vp);
if (err)
return err;
writel(value, ulpi_vp->viewport_addr);
err = ulpi_wait(ulpi_vp, OMAP_ULPI_ACCESS);
if (err)
debug("ULPI request timed out\n");
return err;
}
static int
ulpi_scratch_test(struct imxehci_softc *sc)
{
uint32_t ulpi_view;
ulpi_view = ulpi_wakeup(sc, 1000);
if (ulpi_view & ULPI_WU) {
return -1;
}
bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW,
(ULPI_RUN | ULPI_RW |
(ULPI_SCRATCH << ULPI_ADDR_SHIFT) | 0xAA));
ulpi_view = ulpi_wait(sc, 1000);
if (ulpi_view & ULPI_RUN) {
return -1;
}
return 0;
}
