/* $NetBSD: omap3_sdhc.c,v 1.11 2013/06/18 15:04:53 matt Exp $ */ /*- * Copyright (c) 2011 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Matt Thomas of 3am Software Foundry. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: omap3_sdhc.c,v 1.11 2013/06/18 15:04:53 matt Exp $"); #include "opt_omap.h" #include #include #include #include #include #include #include #include #include #include #ifdef TI_AM335X # include # include #endif #include #include #define CLKD(kz) (sc->sc.sc_clkbase / (kz)) #define SDHC_READ(sc, reg) \ bus_space_read_4((sc)->sc_bst, (sc)->sc_sdhc_bsh, (reg)) #define SDHC_WRITE(sc, reg, val) \ bus_space_write_4((sc)->sc_bst, (sc)->sc_sdhc_bsh, (reg), (val)) static int obiosdhc_match(device_t, cfdata_t, void *); static void obiosdhc_attach(device_t, device_t, void *); static int obiosdhc_detach(device_t, int); static int obiosdhc_bus_clock(struct sdhc_softc *, int); static int obiosdhc_rod(struct sdhc_softc *, int); static int obiosdhc_write_protect(struct sdhc_softc *); static int obiosdhc_card_detect(struct sdhc_softc *); struct obiosdhc_softc { struct sdhc_softc sc; bus_space_tag_t sc_bst; bus_space_handle_t sc_bsh; bus_space_handle_t sc_sdhc_bsh; struct sdhc_host *sc_hosts[1]; void *sc_ih; /* interrupt vectoring */ }; #ifdef TI_AM335X struct am335x_sdhc { const char *as_name; bus_addr_t as_base_addr; int as_intr; struct omap_module as_module; }; static const struct am335x_sdhc am335x_sdhc[] = { /* XXX All offset by 0x100 because of the am335x's mmc registers. */ { "MMCHS0", 0x48060100, 64, { AM335X_PRCM_CM_PER, 0x3c } }, { "MMC1", 0x481d8100, 28, { AM335X_PRCM_CM_PER, 0xf4 } }, { "MMCHS2", 0x47810100, 29, { AM335X_PRCM_CM_WKUP, 0xf8 } }, }; #endif CFATTACH_DECL_NEW(obiosdhc, sizeof(struct obiosdhc_softc), obiosdhc_match, obiosdhc_attach, obiosdhc_detach, NULL); static int obiosdhc_match(device_t parent, cfdata_t cf, void *aux) { #if defined(OMAP_3430) || defined(OMAP_3530) || defined(OMAP4) struct obio_attach_args * const oa = aux; #endif #ifdef TI_AM335X struct obio_attach_args * const oa = aux; size_t i; #endif #if defined(OMAP_3430) if (oa->obio_addr == SDMMC1_BASE_3430 || oa->obio_addr == SDMMC2_BASE_3430 || oa->obio_addr == SDMMC3_BASE_3430) return 1; #elif defined(OMAP_3530) if (oa->obio_addr == SDMMC1_BASE_3530 || oa->obio_addr == SDMMC2_BASE_3530 || oa->obio_addr == SDMMC3_BASE_3530) return 1; #elif defined(OMAP4) if (oa->obio_addr == SDMMC1_BASE_4430 || oa->obio_addr == SDMMC2_BASE_4430 || oa->obio_addr == SDMMC3_BASE_4430 || oa->obio_addr == SDMMC4_BASE_4430 || oa->obio_addr == SDMMC5_BASE_4430) return 1; #endif #ifdef TI_AM335X for (i = 0; i < __arraycount(am335x_sdhc); i++) if ((oa->obio_addr == am335x_sdhc[i].as_base_addr) && (oa->obio_intr == am335x_sdhc[i].as_intr)) return 1; #endif return 0; } static void obiosdhc_attach(device_t parent, device_t self, void *aux) { struct obiosdhc_softc * const sc = device_private(self); struct obio_attach_args * const oa = aux; prop_dictionary_t prop = device_properties(self); uint32_t clkd, stat; int error, timo, clksft, n; bool support8bit = false; #ifdef TI_AM335X size_t i; #endif prop_dictionary_get_bool(prop, "8bit", &support8bit); sc->sc.sc_dmat = oa->obio_dmat; sc->sc.sc_dev = self; //sc->sc.sc_flags |= SDHC_FLAG_USE_DMA; sc->sc.sc_flags |= SDHC_FLAG_32BIT_ACCESS; sc->sc.sc_flags |= SDHC_FLAG_NO_LED_ON; sc->sc.sc_flags |= SDHC_FLAG_RSP136_CRC; sc->sc.sc_flags |= SDHC_FLAG_SINGLE_ONLY; if (support8bit) sc->sc.sc_flags |= SDHC_FLAG_8BIT_MODE; #ifdef TI_AM335X sc->sc.sc_flags |= SDHC_FLAG_WAIT_RESET; sc->sc.sc_flags &= ~SDHC_FLAG_SINGLE_ONLY; #endif #if defined(OMAP_3530) sc->sc.sc_flags &= ~SDHC_FLAG_SINGLE_ONLY; #endif sc->sc.sc_host = sc->sc_hosts; sc->sc.sc_clkbase = 96000; /* 96MHZ */ if (!prop_dictionary_get_uint32(prop, "clkmask", &sc->sc.sc_clkmsk)) sc->sc.sc_clkmsk = 0x0000ffc0; sc->sc.sc_vendor_rod = obiosdhc_rod; sc->sc.sc_vendor_write_protect = obiosdhc_write_protect; sc->sc.sc_vendor_card_detect = obiosdhc_card_detect; sc->sc.sc_vendor_bus_clock = obiosdhc_bus_clock; sc->sc_bst = oa->obio_iot; clksft = ffs(sc->sc.sc_clkmsk) - 1; error = bus_space_map(sc->sc_bst, oa->obio_addr, oa->obio_size, 0, &sc->sc_bsh); if (error) { aprint_error_dev(self, "can't map registers: %d\n", error); return; } bus_space_subregion(sc->sc_bst, sc->sc_bsh, OMAP3_SDMMC_SDHC_OFFSET, OMAP3_SDMMC_SDHC_SIZE, &sc->sc_sdhc_bsh); aprint_naive(": SDHC controller\n"); aprint_normal(": SDHC controller\n"); #ifdef TI_AM335X /* XXX Not really AM335X-specific. */ for (i = 0; i < __arraycount(am335x_sdhc); i++) if ((oa->obio_addr == am335x_sdhc[i].as_base_addr) && (oa->obio_intr == am335x_sdhc[i].as_intr)) { prcm_module_enable(&am335x_sdhc[i].as_module); break; } KASSERT(i < __arraycount(am335x_sdhc)); #endif /* XXXXXX: Turn-on regurator via I2C. */ /* XXXXXX: And enable ICLOCK/FCLOCK. */ /* MMCHS Soft reset */ bus_space_write_4(sc->sc_bst, sc->sc_bsh, MMCHS_SYSCONFIG, SYSCONFIG_SOFTRESET); timo = 3000000; /* XXXX 3 sec. */ while (timo--) { if (bus_space_read_4(sc->sc_bst, sc->sc_bsh, MMCHS_SYSSTATUS) & SYSSTATUS_RESETDONE) break; delay(1); } if (timo == 0) aprint_error_dev(self, "Soft reset timeout\n"); bus_space_write_4(sc->sc_bst, sc->sc_bsh, MMCHS_SYSCONFIG, SYSCONFIG_ENAWAKEUP | SYSCONFIG_AUTOIDLE | SYSCONFIG_SIDLEMODE_AUTO | SYSCONFIG_CLOCKACTIVITY_FCLK | SYSCONFIG_CLOCKACTIVITY_ICLK); sc->sc_ih = intr_establish(oa->obio_intr, IPL_VM, IST_LEVEL, sdhc_intr, &sc->sc); if (sc->sc_ih == NULL) { aprint_error_dev(self, "failed to establish interrupt %d\n", oa->obio_intr); goto fail; } error = sdhc_host_found(&sc->sc, sc->sc_bst, sc->sc_sdhc_bsh, oa->obio_size - OMAP3_SDMMC_SDHC_OFFSET); if (error != 0) { aprint_error_dev(self, "couldn't initialize host, error=%d\n", error); goto fail; } /* Set SDVS 1.8v and DTW 1bit mode */ SDHC_WRITE(sc, SDHC_HOST_CTL, SDHC_VOLTAGE_1_8V << (SDHC_VOLTAGE_SHIFT + 8)); bus_space_write_4(sc->sc_bst, sc->sc_bsh, MMCHS_CON, bus_space_read_4(sc->sc_bst, sc->sc_bsh, MMCHS_CON) | CON_OD); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) | SDHC_INTCLK_ENABLE | SDHC_SDCLK_ENABLE); SDHC_WRITE(sc, SDHC_HOST_CTL, SDHC_READ(sc, SDHC_HOST_CTL) | SDHC_BUS_POWER << 8); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) | CLKD(150) << clksft); /* * 22.6.1.3.1.5 MMCHS Controller INIT Procedure Start * from 'OMAP35x Applications Processor Technical Reference Manual'. * * During the INIT procedure, the MMCHS controller generates 80 clock * periods. In order to keep the 1ms gap, the MMCHS controller should * be configured to generate a clock whose frequency is smaller or * equal to 80 KHz. */ SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) & ~SDHC_SDCLK_ENABLE); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) & ~sc->sc.sc_clkmsk); clkd = CLKD(80); n = 1; while (clkd & ~(sc->sc.sc_clkmsk >> clksft)) { clkd >>= 1; n <<= 1; } SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) | (clkd << clksft)); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) | SDHC_SDCLK_ENABLE); bus_space_write_4(sc->sc_bst, sc->sc_bsh, MMCHS_CON, bus_space_read_4(sc->sc_bst, sc->sc_bsh, MMCHS_CON) | CON_INIT); for (; n > 0; n--) { SDHC_WRITE(sc, SDHC_TRANSFER_MODE, 0x00000000); timo = 3000000; /* XXXX 3 sec. */ stat = 0; while (!(stat & SDHC_COMMAND_COMPLETE)) { stat = SDHC_READ(sc, SDHC_NINTR_STATUS); if (--timo == 0) break; delay(1); } if (timo == 0) { aprint_error_dev(self, "INIT Procedure timeout\n"); break; } SDHC_WRITE(sc, SDHC_NINTR_STATUS, stat); } bus_space_write_4(sc->sc_bst, sc->sc_bsh, MMCHS_CON, bus_space_read_4(sc->sc_bst, sc->sc_bsh, MMCHS_CON) & ~CON_INIT); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) & ~SDHC_SDCLK_ENABLE); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) & ~sc->sc.sc_clkmsk); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) | CLKD(150) << clksft); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) | SDHC_SDCLK_ENABLE); return; fail: if (sc->sc_ih) { intr_disestablish(sc->sc_ih); sc->sc_ih = NULL; } bus_space_unmap(sc->sc_bst, sc->sc_bsh, oa->obio_size); } static int obiosdhc_detach(device_t self, int flags) { // struct obiosdhc_softc *sc = device_private(self); int error; error = config_detach_children(self, flags); /* XXXXXX: Regurator turn-off via I2C. */ /* XXXXXX: And disable ICLOCK/FCLOCK. */ return error; } static int obiosdhc_rod(struct sdhc_softc *sc, int on) { struct obiosdhc_softc *osc = (struct obiosdhc_softc *)sc; uint32_t con; con = bus_space_read_4(osc->sc_bst, osc->sc_bsh, MMCHS_CON); if (on) con |= CON_OD; else con &= ~CON_OD; bus_space_write_4(osc->sc_bst, osc->sc_bsh, MMCHS_CON, con); return 0; } static int obiosdhc_write_protect(struct sdhc_softc *sc) { /* Maybe board dependent, using GPIO. Get GPIO-pin from prop? */ return 0; /* XXXXXXX */ } static int obiosdhc_card_detect(struct sdhc_softc *sc) { /* Maybe board dependent, using GPIO. Get GPIO-pin from prop? */ return 1; /* XXXXXXXX */ } static int obiosdhc_bus_clock(struct sdhc_softc *sc, int clk) { struct obiosdhc_softc *osc = (struct obiosdhc_softc *)sc; uint32_t ctl; ctl = bus_space_read_4(osc->sc_bst, osc->sc_bsh, MMCHS_SYSCTL); if (clk == 0) { clk &= ~SYSCTL_CEN; } else { clk |= SYSCTL_CEN; } bus_space_write_4(osc->sc_bst, osc->sc_bsh, MMCHS_SYSCTL, ctl); return 0; }