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tegra_xusbpad.c revision 1.1 
      1 /* $NetBSD: tegra_xusbpad.c,v 1.1 2015/05/15 11:49:10 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2015 Jared D. McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include "locators.h"
     30 
     31 #include <sys/cdefs.h>
     32 __KERNEL_RCSID(0, "$NetBSD: tegra_xusbpad.c,v 1.1 2015/05/15 11:49:10 jmcneill Exp $");
     33 
     34 #include <sys/param.h>
     35 #include <sys/bus.h>
     36 #include <sys/device.h>
     37 #include <sys/intr.h>
     38 #include <sys/systm.h>
     39 #include <sys/kernel.h>
     40 
     41 #include <arm/nvidia/tegra_reg.h>
     42 #include <arm/nvidia/tegra_xusbpadreg.h>
     43 #include <arm/nvidia/tegra_var.h>
     44 
     45 static int	tegra_xusbpad_match(device_t, cfdata_t, void *);
     46 static void	tegra_xusbpad_attach(device_t, device_t, void *);
     47 
     48 struct tegra_xusbpad_softc {
     49 	device_t		sc_dev;
     50 	bus_space_tag_t		sc_bst;
     51 	bus_space_handle_t	sc_bsh;
     52 };
     53 
     54 static struct tegra_xusbpad_softc *xusbpad_softc = NULL;
     55 
     56 CFATTACH_DECL_NEW(tegra_xusbpad, sizeof(struct tegra_xusbpad_softc),
     57 	tegra_xusbpad_match, tegra_xusbpad_attach, NULL, NULL);
     58 
     59 static int
     60 tegra_xusbpad_match(device_t parent, cfdata_t cf, void *aux)
     61 {
     62 	return 1;
     63 }
     64 
     65 static void
     66 tegra_xusbpad_attach(device_t parent, device_t self, void *aux)
     67 {
     68 	struct tegra_xusbpad_softc * const sc = device_private(self);
     69 	struct tegraio_attach_args * const tio = aux;
     70 	const struct tegra_locators * const loc = &tio->tio_loc;
     71 
     72 	sc->sc_dev = self;
     73 	sc->sc_bst = tio->tio_bst;
     74 	bus_space_subregion(tio->tio_bst, tio->tio_bsh,
     75 	    loc->loc_offset, loc->loc_size, &sc->sc_bsh);
     76 
     77 	KASSERT(xusbpad_softc == NULL);
     78 	xusbpad_softc = sc;
     79 
     80 	aprint_naive("\n");
     81 	aprint_normal(": XUSB PADCTL\n");
     82 
     83 }
     84 
     85 static void
     86 tegra_xusbpad_get_bs(bus_space_tag_t *pbst, bus_space_handle_t *pbsh)
     87 {
     88 	if (xusbpad_softc) {
     89 		*pbst = xusbpad_softc->sc_bst;
     90 		*pbsh = xusbpad_softc->sc_bsh;
     91 	} else {
     92 		*pbst = &armv7_generic_bs_tag;
     93 		bus_space_subregion(*pbst, tegra_apb_bsh,
     94 		    TEGRA_XUSB_PADCTL_OFFSET, TEGRA_XUSB_PADCTL_SIZE, pbsh);
     95 	}
     96 }
     97 
     98 void
     99 tegra_xusbpad_sata_enable(void)
    100 {
    101 	bus_space_tag_t bst;
    102 	bus_space_handle_t bsh;
    103 	int retry;
    104 
    105 	tegra_xusbpad_get_bs(&bst, &bsh);
    106 
    107 	tegra_reg_set_clear(bst, bsh, XUSB_PADCTL_USB3_PAD_MUX_REG,
    108 	    __SHIFTIN(XUSB_PADCTL_USB3_PAD_MUX_SATA_PAD_LANE0_SATA,
    109 		      XUSB_PADCTL_USB3_PAD_MUX_SATA_PAD_LANE0) |
    110 	    XUSB_PADCTL_USB3_PAD_MUX_FORCE_SATA_PAD_IDDQ_DISABLE_MASK0,
    111 	    XUSB_PADCTL_USB3_PAD_MUX_SATA_PAD_LANE0);
    112 
    113 	tegra_reg_set_clear(bst, bsh, XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_REG,
    114 	    0,
    115 	    XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_IDDQ |
    116 	    XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_IDDQ_OVRD);
    117 	tegra_reg_set_clear(bst, bsh, XUSB_PADCTL_IOPHY_PLL_S0_CTL1_REG,
    118 	    0,
    119 	    XUSB_PADCTL_IOPHY_PLL_S0_CTL1_IDDQ |
    120 	    XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PWR_OVRD);
    121 	tegra_reg_set_clear(bst, bsh, XUSB_PADCTL_IOPHY_PLL_S0_CTL1_REG,
    122 	    XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL1_MODE, 0);
    123 	tegra_reg_set_clear(bst, bsh, XUSB_PADCTL_IOPHY_PLL_S0_CTL1_REG,
    124 	    XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_RST, 0);
    125 
    126 	for (retry = 1000; retry > 0; retry--) {
    127 		const uint32_t v = bus_space_read_4(bst, bsh,
    128 		    XUSB_PADCTL_IOPHY_PLL_S0_CTL1_REG);
    129 		if (v & XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL1_LOCKDET)
    130 			break;
    131 		delay(100);
    132 	}
    133 	if (retry == 0) {
    134 		printf("WARNING: SATA PHY power-on failed\n");
    135 	}
    136 }
    137