| version 1.1.2.1, 2020/12/23 14:42:38 |
version 1.1.2.2, 2021/01/03 16:34:52 |
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/* $NetBSD$ */ |
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|
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/*- |
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* Copyright (c) 2019 Genetec Corporation. All rights reserved. |
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* Written by Hashimoto Kenichi for Genetec Corporation. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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|
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#include <sys/cdefs.h> |
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__KERNEL_RCSID(0, "$NetBSD$"); |
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|
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#include "opt_fdt.h" |
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|
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#include <sys/param.h> |
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#include <sys/bus.h> |
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#include <sys/device.h> |
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#include <sys/intr.h> |
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#include <sys/systm.h> |
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#include <sys/kernel.h> |
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#include <sys/gpio.h> |
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|
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#include <dev/sdmmc/sdhcreg.h> |
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#include <dev/sdmmc/sdhcvar.h> |
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#include <dev/sdmmc/sdmmcvar.h> |
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|
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#include <dev/fdt/fdtvar.h> |
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|
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static int imx_sdhc_match(device_t, cfdata_t, void *); |
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static void imx_sdhc_attach(device_t, device_t, void *); |
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|
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static int imx_sdhc_card_detect(struct sdhc_softc *); |
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static int imx_sdhc_write_protect(struct sdhc_softc *); |
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|
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struct imx_sdhc_softc { |
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struct sdhc_softc sc_sdhc; |
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|
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bus_space_tag_t sc_bst; |
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bus_space_handle_t sc_bsh; |
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bus_size_t sc_bsz; |
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|
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struct sdhc_host *sc_host; |
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void *sc_ih; |
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|
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struct clk *sc_clk_per; |
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struct fdtbus_regulator *sc_vmmc_supply; |
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|
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struct fdtbus_gpio_pin *sc_pin_cd; |
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struct fdtbus_gpio_pin *sc_pin_wp; |
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}; |
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|
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CFATTACH_DECL_NEW(imx_sdhc, sizeof(struct imx_sdhc_softc), |
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imx_sdhc_match, imx_sdhc_attach, NULL, NULL); |
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|
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struct imx6_sdhc_config { |
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uint32_t flags; |
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}; |
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|
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static const struct imx6_sdhc_config imx6q_config = { |
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.flags = SDHC_FLAG_BROKEN_ADMA2_ZEROLEN | |
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SDHC_FLAG_NO_BUSY_INTR, |
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}; |
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|
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static const struct imx6_sdhc_config imx7d_config = { |
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.flags = 0 |
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}; |
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|
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static const struct of_compat_data compat_data[] = { |
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{ "fsl,imx6q-usdhc", (uintptr_t)&imx6q_config }, |
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{ "fsl,imx7d-usdhc", (uintptr_t)&imx7d_config }, |
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{ NULL } |
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}; |
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|
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static int |
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imx_sdhc_match(device_t parent, cfdata_t cf, void *aux) |
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{ |
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struct fdt_attach_args * const faa = aux; |
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|
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return of_match_compat_data(faa->faa_phandle, compat_data); |
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} |
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|
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static void |
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imx_sdhc_attach(device_t parent, device_t self, void *aux) |
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{ |
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struct imx_sdhc_softc * const sc = device_private(self); |
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struct fdt_attach_args * const faa = aux; |
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const int phandle = faa->faa_phandle; |
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const struct imx6_sdhc_config *conf; |
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char intrstr[128]; |
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bus_addr_t addr; |
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bus_size_t size; |
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u_int bus_width; |
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int error; |
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|
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fdtbus_clock_assign(phandle); |
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|
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if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { |
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aprint_error(": couldn't get registers\n"); |
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return; |
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} |
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|
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sc->sc_clk_per = fdtbus_clock_get(phandle, "per"); |
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if (sc->sc_clk_per == NULL) { |
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aprint_error(": couldn't get clock\n"); |
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return; |
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} |
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|
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if (of_getprop_uint32(phandle, "bus-width", &bus_width)) |
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bus_width = 4; |
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|
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sc->sc_vmmc_supply = fdtbus_regulator_acquire(phandle, "vmmc-supply"); |
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|
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conf = (void *)of_search_compatible(phandle, compat_data)->data; |
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|
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sc->sc_sdhc.sc_dev = self; |
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sc->sc_sdhc.sc_dmat = faa->faa_dmat; |
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|
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sc->sc_sdhc.sc_clkbase = clk_get_rate(sc->sc_clk_per) / 1000; |
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sc->sc_sdhc.sc_flags = |
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SDHC_FLAG_USE_DMA | |
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SDHC_FLAG_NO_PWR0 | |
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SDHC_FLAG_HAVE_DVS | |
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SDHC_FLAG_32BIT_ACCESS | |
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SDHC_FLAG_USE_ADMA2 | |
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SDHC_FLAG_USDHC; |
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sc->sc_sdhc.sc_flags |= conf->flags; |
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|
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if (bus_width == 8) |
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sc->sc_sdhc.sc_flags |= SDHC_FLAG_8BIT_MODE; |
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if (of_hasprop(phandle, "no-1-8-v")) |
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sc->sc_sdhc.sc_flags |= SDHC_FLAG_NO_1_8_V; |
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sc->sc_sdhc.sc_host = &sc->sc_host; |
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|
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sc->sc_bst = faa->faa_bst; |
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error = bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh); |
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if (error) { |
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aprint_error(": couldn't map %#" PRIxBUSADDR ": %d", addr, error); |
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return; |
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} |
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sc->sc_bsz = size; |
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|
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sc->sc_pin_cd = fdtbus_gpio_acquire(phandle, |
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"cd-gpios", GPIO_PIN_INPUT); |
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if (sc->sc_pin_cd) { |
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sc->sc_sdhc.sc_vendor_card_detect = imx_sdhc_card_detect; |
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sc->sc_sdhc.sc_flags |= SDHC_FLAG_POLL_CARD_DET; |
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} |
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sc->sc_pin_wp = fdtbus_gpio_acquire(phandle, |
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"wp-gpios", GPIO_PIN_INPUT); |
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if (sc->sc_pin_wp) { |
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sc->sc_sdhc.sc_vendor_write_protect = imx_sdhc_write_protect; |
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} |
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|
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error = clk_enable(sc->sc_clk_per); |
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if (error) { |
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aprint_error(": couldn't enable clock: %d\n", error); |
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return; |
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} |
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|
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if (sc->sc_vmmc_supply != NULL) { |
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error = fdtbus_regulator_enable(sc->sc_vmmc_supply); |
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if (error) { |
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aprint_error(": couldn't enable vmmc supply: %d\n", error); |
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return; |
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} |
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} |
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|
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aprint_naive("\n"); |
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aprint_normal(": SDMMC (%u kHz)\n", sc->sc_sdhc.sc_clkbase); |
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|
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if (sc->sc_sdhc.sc_clkbase == 0) { |
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aprint_error_dev(self, "couldn't determine frequency\n"); |
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return; |
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} |
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|
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if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { |
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aprint_error_dev(self, "failed to decode interrupt\n"); |
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return; |
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} |
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sc->sc_ih = fdtbus_intr_establish(phandle, 0, IPL_SDMMC, |
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FDT_INTR_MPSAFE, sdhc_intr, &sc->sc_sdhc); |
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if (sc->sc_ih == NULL) { |
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aprint_error_dev(self, "couldn't establish interrupt on %s\n", |
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intrstr); |
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return; |
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} |
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aprint_normal_dev(self, "interrupting on %s\n", intrstr); |
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|
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error = sdhc_host_found(&sc->sc_sdhc, sc->sc_bst, sc->sc_bsh, sc->sc_bsz); |
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if (error) { |
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aprint_error_dev(self, "couldn't initialize host, error = %d\n", |
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error); |
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fdtbus_intr_disestablish(phandle, sc->sc_ih); |
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sc->sc_ih = NULL; |
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return; |
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} |
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} |
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static int |
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imx_sdhc_card_detect(struct sdhc_softc *ssc) |
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{ |
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struct imx_sdhc_softc *sc = device_private(ssc->sc_dev); |
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KASSERT(sc->sc_pin_cd != NULL); |
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return fdtbus_gpio_read(sc->sc_pin_cd); |
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} |
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static int |
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imx_sdhc_write_protect(struct sdhc_softc *ssc) |
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{ |
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struct imx_sdhc_softc *sc = device_private(ssc->sc_dev); |
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KASSERT(sc->sc_pin_wp != NULL); |
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return fdtbus_gpio_read(sc->sc_pin_wp); |
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} |
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