C++ (Cpp) __LOWEST_SET_BIT Exemples

Exemple #1

static void
awin_usb_phy_write(struct awinusb_softc *usbsc, u_int bit_addr, u_int bits,
                   u_int len)
{
    bus_space_tag_t bst = usbsc->usbsc_bst;
    bus_space_handle_t bsh = usbsc->usbsc_usb0_phy_csr_bsh;
    uint32_t clk = AWIN_USB0_PHY_CTL_CLK0 << usbsc->usbsc_number;

    uint32_t v = bus_space_read_4(bst, bsh, 0);

    KASSERT((v & AWIN_USB0_PHY_CTL_CLK0) == 0);
    KASSERT((v & AWIN_USB0_PHY_CTL_CLK1) == 0);
    KASSERT((v & AWIN_USB0_PHY_CTL_CLK2) == 0);

    v &= ~AWIN_USB0_PHY_CTL_ADDR;
    v &= ~AWIN_USB0_PHY_CTL_DAT;

    v |= __SHIFTIN(bit_addr, AWIN_USB0_PHY_CTL_ADDR);

    /*
     * Bitbang the data to the phy, bit by bit, incrementing bit address
     * as we go.
     */
    for (; len > 0; bit_addr++, bits >>= 1, len--) {
        v |= __SHIFTIN(bits & 1, AWIN_USB0_PHY_CTL_DAT);
        bus_space_write_4(bst, bsh, 0, v);
        delay(1);
        bus_space_write_4(bst, bsh, 0, v | clk);
        delay(1);
        bus_space_write_4(bst, bsh, 0, v);
        delay(1);
        v += __LOWEST_SET_BIT(AWIN_USB0_PHY_CTL_ADDR);
        v &= ~AWIN_USB0_PHY_CTL_DAT;
    }
}

Exemple #2

Fichier : awin_otg.c Projet : yazshel/netbsd-kernel

static void
awin_otg_phy_write(struct awin_otg_softc *sc, u_int bit_addr, u_int bits,
    u_int len)
{
	bus_space_tag_t bst = sc->sc_motg.sc_iot;
	bus_space_handle_t bsh = sc->sc_motg.sc_ioh;
	uint32_t clk = AWIN_USB0_PHY_CTL_CLK0;
	bus_size_t reg = AWIN_USB0_PHY_CTL_REG;

	uint32_t v = bus_space_read_4(bst, bsh, reg);

	KASSERT((v & AWIN_USB0_PHY_CTL_CLK0) == 0);
	KASSERT((v & AWIN_USB0_PHY_CTL_CLK1) == 0);
	KASSERT((v & AWIN_USB0_PHY_CTL_CLK2) == 0);

	v &= ~AWIN_USB0_PHY_CTL_ADDR;
	v &= ~AWIN_USB0_PHY_CTL_DAT;

	v |= __SHIFTIN(bit_addr, AWIN_USB0_PHY_CTL_ADDR);

	/*
	 * Bitbang the data to the phy, bit by bit, incrementing bit address
	 * as we go.
	 */
	for (; len > 0; bit_addr++, bits >>= 1, len--) {
		v |= __SHIFTIN(bits & 1, AWIN_USB0_PHY_CTL_DAT);
		bus_space_write_4(bst, bsh, reg, v);
		delay(1);
		bus_space_write_4(bst, bsh, reg, v | clk);
		delay(1);
		bus_space_write_4(bst, bsh, reg, v);
		delay(1);
		v += __LOWEST_SET_BIT(AWIN_USB0_PHY_CTL_ADDR);
		v &= ~AWIN_USB0_PHY_CTL_DAT;
	}
}