/* $NetBSD: pxa2x0_mci.c,v 1.14 2023/03/28 20:01:57 andvar Exp $ */ /* $OpenBSD: pxa2x0_mmc.c,v 1.5 2009/02/23 18:09:55 miod Exp $ */ /* * Copyright (c) 2007 Uwe Stuehler * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /*- * Copyright (C) 2007-2010 NONAKA Kimihiro * All rights reserved. * * 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 AUTHOR ``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 AUTHOR 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. */ /* * MMC/SD/SDIO controller driver for Intel PXA2xx processors * * Power management is beyond control of the processor's SD/SDIO/MMC * block, so this driver depends on the attachment driver to provide * us with some callback functions via the "tag" member in our softc. * Bus power management calls are then dispatched to the attachment * driver. */ #include __KERNEL_RCSID(0, "$NetBSD: pxa2x0_mci.c,v 1.14 2023/03/28 20:01:57 andvar Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef PXAMCI_DEBUG int pxamci_debug = 9; #define DPRINTF(n,s) do { if ((n) <= pxamci_debug) printf s; } while (0) #else #define DPRINTF(n,s) do {} while (0) #endif #ifndef PXAMCI_DEBUG #define STOPCLK_TIMO 2 /* sec */ #define EXECCMD_TIMO 2 /* sec */ #else #define STOPCLK_TIMO 2 /* sec */ #define EXECCMD_TIMO 5 /* sec */ #endif static int pxamci_host_reset(sdmmc_chipset_handle_t); static uint32_t pxamci_host_ocr(sdmmc_chipset_handle_t); static int pxamci_host_maxblklen(sdmmc_chipset_handle_t); static int pxamci_card_detect(sdmmc_chipset_handle_t); static int pxamci_write_protect(sdmmc_chipset_handle_t); static int pxamci_bus_power(sdmmc_chipset_handle_t, uint32_t); static int pxamci_bus_clock(sdmmc_chipset_handle_t, int); static int pxamci_bus_width(sdmmc_chipset_handle_t, int); static int pxamci_bus_rod(sdmmc_chipset_handle_t, int); static void pxamci_exec_command(sdmmc_chipset_handle_t, struct sdmmc_command *); static void pxamci_card_enable_intr(sdmmc_chipset_handle_t, int); static void pxamci_card_intr_ack(sdmmc_chipset_handle_t); static struct sdmmc_chip_functions pxamci_chip_functions = { /* host controller reset */ .host_reset = pxamci_host_reset, /* host controller capabilities */ .host_ocr = pxamci_host_ocr, .host_maxblklen = pxamci_host_maxblklen, /* card detection */ .card_detect = pxamci_card_detect, /* write protect */ .write_protect = pxamci_write_protect, /* bus power, clock frequency, width */ .bus_power = pxamci_bus_power, .bus_clock = pxamci_bus_clock, .bus_width = pxamci_bus_width, .bus_rod = pxamci_bus_rod, /* command execution */ .exec_command = pxamci_exec_command, /* card interrupt */ .card_enable_intr = pxamci_card_enable_intr, .card_intr_ack = pxamci_card_intr_ack, }; static int pxamci_intr(void *); static void pxamci_intr_cmd(struct pxamci_softc *); static void pxamci_intr_data(struct pxamci_softc *); static void pxamci_intr_done(struct pxamci_softc *); static void pxamci_dmac_iintr(struct dmac_xfer *, int); static void pxamci_dmac_ointr(struct dmac_xfer *, int); static void pxamci_stop_clock(struct pxamci_softc *); #define CSR_READ_1(sc, reg) \ bus_space_read_1((sc)->sc_iot, (sc)->sc_ioh, (reg)) #define CSR_WRITE_1(sc, reg, val) \ bus_space_write_1((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)) #define CSR_READ_4(sc, reg) \ bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)) #define CSR_WRITE_4(sc, reg, val) \ bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)) #define CSR_SET_4(sc, reg, val) \ CSR_WRITE_4(sc, reg, CSR_READ_4(sc, reg) | (val)) #define CSR_CLR_4(sc, reg, val) \ CSR_WRITE_4(sc, reg, CSR_READ_4(sc, reg) & ~(val)) #if 0 /* XXX */ #define DMA_ALIGNED(addr) \ (((u_long)(addr) & 0x7) == 0 || !CPU_IS_PXA250) #else #define DMA_ALIGNED(addr) \ (((u_long)(addr) & 0x1f) == 0) #endif static void pxamci_enable_intr(struct pxamci_softc *sc, uint32_t mask) { int s; s = splsdmmc(); sc->sc_imask &= ~mask; CSR_WRITE_4(sc, MMC_I_MASK, sc->sc_imask); splx(s); } static void pxamci_disable_intr(struct pxamci_softc *sc, uint32_t mask) { int s; s = splsdmmc(); sc->sc_imask |= mask; CSR_WRITE_4(sc, MMC_I_MASK, sc->sc_imask); splx(s); } int pxamci_attach_sub(device_t self, struct pxaip_attach_args *pxa) { struct pxamci_softc *sc = device_private(self); struct sdmmcbus_attach_args saa; sc->sc_dev = self; aprint_normal(": MMC/SD Controller\n"); aprint_naive("\n"); /* Enable the clocks to the MMC controller. */ pxa2x0_clkman_config(CKEN_MMC, 1); sc->sc_iot = pxa->pxa_iot; if (bus_space_map(sc->sc_iot, PXA2X0_MMC_BASE, PXA2X0_MMC_SIZE, 0, &sc->sc_ioh)) { aprint_error_dev(sc->sc_dev, "couldn't map registers\n"); goto out; } /* * Establish the card detection and MMC interrupt handlers and * mask all interrupts until we are prepared to handle them. */ pxamci_disable_intr(sc, MMC_I_ALL); sc->sc_ih = pxa2x0_intr_establish(PXA2X0_INT_MMC, IPL_SDMMC, pxamci_intr, sc); if (sc->sc_ih == NULL) { aprint_error_dev(sc->sc_dev, "couldn't establish MMC interrupt\n"); goto free_map; } /* * Reset the host controller and unmask normal interrupts. */ (void) pxamci_host_reset(sc); /* Setup bus clock */ if (CPU_IS_PXA270) { sc->sc_clkmin = PXA270_MMC_CLKRT_MIN / 1000; sc->sc_clkmax = PXA270_MMC_CLKRT_MAX / 1000; } else { sc->sc_clkmin = PXA250_MMC_CLKRT_MIN / 1000; sc->sc_clkmax = PXA250_MMC_CLKRT_MAX / 1000; } sc->sc_clkbase = sc->sc_clkmin; pxamci_bus_clock(sc, sc->sc_clkbase); /* Setup max block length */ if (CPU_IS_PXA270) { sc->sc_maxblklen = 2048; } else { sc->sc_maxblklen = 512; } /* Set default bus width */ sc->sc_buswidth = 1; /* setting DMA */ if (!ISSET(sc->sc_caps, PMC_CAPS_NO_DMA)) { aprint_normal_dev(sc->sc_dev, "using DMA transfer\n"); sc->sc_rxdr.ds_addr = PXA2X0_MMC_BASE + MMC_RXFIFO; sc->sc_rxdr.ds_len = 1; sc->sc_rxdx = pxa2x0_dmac_allocate_xfer(); if (sc->sc_rxdx == NULL) { aprint_error_dev(sc->sc_dev, "couldn't alloc rx dma xfer\n"); goto free_intr; } sc->sc_rxdx->dx_cookie = sc; sc->sc_rxdx->dx_priority = DMAC_PRIORITY_NORMAL; sc->sc_rxdx->dx_dev_width = DMAC_DEV_WIDTH_1; sc->sc_rxdx->dx_burst_size = DMAC_BURST_SIZE_32; sc->sc_rxdx->dx_done = pxamci_dmac_iintr; sc->sc_rxdx->dx_peripheral = DMAC_PERIPH_MMCRX; sc->sc_rxdx->dx_flow = DMAC_FLOW_CTRL_SRC; sc->sc_rxdx->dx_loop_notify = DMAC_DONT_LOOP; sc->sc_rxdx->dx_desc[DMAC_DESC_SRC].xd_addr_hold = true; sc->sc_rxdx->dx_desc[DMAC_DESC_SRC].xd_nsegs = 1; sc->sc_rxdx->dx_desc[DMAC_DESC_SRC].xd_dma_segs = &sc->sc_rxdr; sc->sc_rxdx->dx_desc[DMAC_DESC_DST].xd_addr_hold = false; sc->sc_txdr.ds_addr = PXA2X0_MMC_BASE + MMC_TXFIFO; sc->sc_txdr.ds_len = 1; sc->sc_txdx = pxa2x0_dmac_allocate_xfer(); if (sc->sc_txdx == NULL) { aprint_error_dev(sc->sc_dev, "couldn't alloc tx dma xfer\n"); goto free_xfer; } sc->sc_txdx->dx_cookie = sc; sc->sc_txdx->dx_priority = DMAC_PRIORITY_NORMAL; sc->sc_txdx->dx_dev_width = DMAC_DEV_WIDTH_1; sc->sc_txdx->dx_burst_size = DMAC_BURST_SIZE_32; sc->sc_txdx->dx_done = pxamci_dmac_ointr; sc->sc_txdx->dx_peripheral = DMAC_PERIPH_MMCTX; sc->sc_txdx->dx_flow = DMAC_FLOW_CTRL_DEST; sc->sc_txdx->dx_loop_notify = DMAC_DONT_LOOP; sc->sc_txdx->dx_desc[DMAC_DESC_DST].xd_addr_hold = true; sc->sc_txdx->dx_desc[DMAC_DESC_DST].xd_nsegs = 1; sc->sc_txdx->dx_desc[DMAC_DESC_DST].xd_dma_segs = &sc->sc_txdr; sc->sc_txdx->dx_desc[DMAC_DESC_SRC].xd_addr_hold = false; } /* * Attach the generic SD/MMC bus driver. (The bus driver must * not invoke any chipset functions before it is attached.) */ memset(&saa, 0, sizeof(saa)); saa.saa_busname = "sdmmc"; saa.saa_sct = &pxamci_chip_functions; saa.saa_sch = sc; saa.saa_dmat = pxa->pxa_dmat; saa.saa_clkmin = sc->sc_clkmin; saa.saa_clkmax = sc->sc_clkmax; saa.saa_caps = 0; if (!ISSET(sc->sc_caps, PMC_CAPS_NO_DMA)) SET(saa.saa_caps, SMC_CAPS_DMA | SMC_CAPS_MULTI_SEG_DMA); if (CPU_IS_PXA270 && ISSET(sc->sc_caps, PMC_CAPS_4BIT)) SET(saa.saa_caps, SMC_CAPS_4BIT_MODE); sc->sc_sdmmc = config_found(sc->sc_dev, &saa, NULL, CFARGS_NONE); if (sc->sc_sdmmc == NULL) { aprint_error_dev(sc->sc_dev, "couldn't attach bus\n"); goto free_xfer; } return 0; free_xfer: if (!ISSET(sc->sc_caps, PMC_CAPS_NO_DMA)) { if (sc->sc_rxdx) pxa2x0_dmac_free_xfer(sc->sc_rxdx); if (sc->sc_txdx) pxa2x0_dmac_free_xfer(sc->sc_txdx); } free_intr: pxa2x0_intr_disestablish(sc->sc_ih); sc->sc_ih = NULL; free_map: bus_space_unmap(sc->sc_iot, sc->sc_ioh, PXA2X0_MMC_SIZE); out: pxa2x0_clkman_config(CKEN_MMC, 0); return 1; } /* * Notify card attach/detach event. */ void pxamci_card_detect_event(struct pxamci_softc *sc) { sdmmc_needs_discover(sc->sc_sdmmc); } /* * Reset the host controller. Called during initialization, when * cards are removed, upon resume, and during error recovery. */ static int pxamci_host_reset(sdmmc_chipset_handle_t sch) { struct pxamci_softc *sc = (struct pxamci_softc *)sch; int s; s = splsdmmc(); CSR_WRITE_4(sc, MMC_SPI, 0); CSR_WRITE_4(sc, MMC_RESTO, 0x7f); CSR_WRITE_4(sc, MMC_I_MASK, sc->sc_imask); /* Make sure to initialize the card before the next command. */ CLR(sc->sc_flags, PMF_CARDINITED); splx(s); return 0; } static uint32_t pxamci_host_ocr(sdmmc_chipset_handle_t sch) { struct pxamci_softc *sc = (struct pxamci_softc *)sch; int rv; if (__predict_true(sc->sc_tag.get_ocr != NULL)) { rv = (*sc->sc_tag.get_ocr)(sc->sc_tag.cookie); return rv; } DPRINTF(0,("%s: driver lacks get_ocr() function.\n", device_xname(sc->sc_dev))); return ENXIO; } static int pxamci_host_maxblklen(sdmmc_chipset_handle_t sch) { struct pxamci_softc *sc = (struct pxamci_softc *)sch; return sc->sc_maxblklen; } static int pxamci_card_detect(sdmmc_chipset_handle_t sch) { struct pxamci_softc *sc = (struct pxamci_softc *)sch; if (__predict_true(sc->sc_tag.card_detect != NULL)) { return (*sc->sc_tag.card_detect)(sc->sc_tag.cookie); } DPRINTF(0,("%s: driver lacks card_detect() function.\n", device_xname(sc->sc_dev))); return 1; /* always detect */ } static int pxamci_write_protect(sdmmc_chipset_handle_t sch) { struct pxamci_softc *sc = (struct pxamci_softc *)sch; if (__predict_true(sc->sc_tag.write_protect != NULL)) { return (*sc->sc_tag.write_protect)(sc->sc_tag.cookie); } DPRINTF(0,("%s: driver lacks write_protect() function.\n", device_xname(sc->sc_dev))); return 0; /* non-protect */ } /* * Set or change SD bus voltage and enable or disable SD bus power. * Return zero on success. */ static int pxamci_bus_power(sdmmc_chipset_handle_t sch, uint32_t ocr) { struct pxamci_softc *sc = (struct pxamci_softc *)sch; /* * Bus power management is beyond control of the SD/SDIO/MMC * block of the PXA2xx processors, so we have to hand this * task off to the attachment driver. */ if (__predict_true(sc->sc_tag.set_power != NULL)) { return (*sc->sc_tag.set_power)(sc->sc_tag.cookie, ocr); } DPRINTF(0,("%s: driver lacks set_power() function\n", device_xname(sc->sc_dev))); return ENXIO; } /* * Set or change MMCLK frequency or disable the MMC clock. * Return zero on success. */ static int pxamci_bus_clock(sdmmc_chipset_handle_t sch, int freq) { struct pxamci_softc *sc = (struct pxamci_softc *)sch; int actfreq; int div; int rv = 0; int s; s = splsdmmc(); /* * Stop MMC clock before changing the frequency. */ pxamci_stop_clock(sc); /* Just stop the clock. */ if (freq == 0) goto out; /* * PXA27x Errata... * * * E40. SDIO: SDIO Devices Not Working at 19.5 Mbps * * SD/SDIO controller can only support up to 9.75 Mbps data * transfer rate for SDIO card. * * * If we don't limit the frequency, CRC errors will be * reported by the controller after we set the bus speed. * XXX slow down incrementally. */ if (CPU_IS_PXA270) { if (freq > 9750) { freq = 9750; } } /* * Pick the smallest divider that produces a frequency not * more than `freq' KHz. */ actfreq = sc->sc_clkmax; for (div = 0; div < 7; actfreq /= 2, div++) { if (actfreq <= freq) break; } if (div == 7) { aprint_error_dev(sc->sc_dev, "unsupported bus frequency of %d KHz\n", freq); rv = 1; goto out; } DPRINTF(1,("%s: freq = %d, actfreq = %d, div = %d\n", device_xname(sc->sc_dev), freq, actfreq, div)); sc->sc_clkbase = actfreq; sc->sc_clkrt = div; CSR_WRITE_4(sc, MMC_CLKRT, sc->sc_clkrt); CSR_WRITE_4(sc, MMC_STRPCL, STRPCL_START); out: splx(s); return rv; } static int pxamci_bus_width(sdmmc_chipset_handle_t sch, int width) { struct pxamci_softc *sc = (struct pxamci_softc *)sch; int rv = 0; int s; s = splsdmmc(); switch (width) { case 1: break; case 4: if (CPU_IS_PXA270) break; /*FALLTHROUGH*/ default: DPRINTF(0,("%s: unsupported bus width (%d)\n", device_xname(sc->sc_dev), width)); rv = 1; goto out; } sc->sc_buswidth = width; out: splx(s); return rv; } static int pxamci_bus_rod(sdmmc_chipset_handle_t sch, int on) { /* not support */ return -1; } static void pxamci_exec_command(sdmmc_chipset_handle_t sch, struct sdmmc_command *cmd) { struct pxamci_softc *sc = (struct pxamci_softc *)sch; uint32_t cmdat; int error; int timo; int s; DPRINTF(1,("%s: start cmd %d arg=%#x data=%p dlen=%d flags=%#x\n", device_xname(sc->sc_dev), cmd->c_opcode, cmd->c_arg, cmd->c_data, cmd->c_datalen, cmd->c_flags)); s = splsdmmc(); /* Stop the bus clock (MMCLK). [15.8.3] */ pxamci_stop_clock(sc); /* Set the command and argument. */ CSR_WRITE_4(sc, MMC_CMD, cmd->c_opcode & CMD_MASK); CSR_WRITE_4(sc, MMC_ARGH, (cmd->c_arg >> 16) & ARGH_MASK); CSR_WRITE_4(sc, MMC_ARGL, cmd->c_arg & ARGL_MASK); /* Response type */ if (!ISSET(cmd->c_flags, SCF_RSP_PRESENT)) cmdat = CMDAT_RESPONSE_FORMAT_NO; else if (ISSET(cmd->c_flags, SCF_RSP_136)) cmdat = CMDAT_RESPONSE_FORMAT_R2; else if (!ISSET(cmd->c_flags, SCF_RSP_CRC)) cmdat = CMDAT_RESPONSE_FORMAT_R3; else cmdat = CMDAT_RESPONSE_FORMAT_R1; if (ISSET(cmd->c_flags, SCF_RSP_BSY)) cmdat |= CMDAT_BUSY; if (!ISSET(cmd->c_flags, SCF_CMD_READ)) cmdat |= CMDAT_WRITE; if (sc->sc_buswidth == 4) cmdat |= CMDAT_SD_4DAT; /* Fragment the data into proper blocks. */ if (cmd->c_datalen > 0) { int blklen = MIN(cmd->c_datalen, cmd->c_blklen); int numblk = cmd->c_datalen / blklen; if (cmd->c_datalen % blklen > 0) { /* XXX: Split this command. (1.7.4) */ aprint_error_dev(sc->sc_dev, "data not a multiple of %u bytes\n", blklen); cmd->c_error = EINVAL; goto out; } /* Check limit imposed by block count. */ if (numblk > NOB_MASK) { aprint_error_dev(sc->sc_dev, "too much data\n"); cmd->c_error = EINVAL; goto out; } CSR_WRITE_4(sc, MMC_BLKLEN, blklen); CSR_WRITE_4(sc, MMC_NOB, numblk); CSR_WRITE_4(sc, MMC_RDTO, RDTO_MASK); cmdat |= CMDAT_DATA_EN; /* setting DMA */ if (!ISSET(sc->sc_caps, PMC_CAPS_NO_DMA) && DMA_ALIGNED(cmd->c_data)) { struct dmac_xfer_desc *dx_desc; DPRINTF(1,("%s: using DMA\n",device_xname(sc->sc_dev))); cmdat |= CMDAT_MMC_DMA_EN; if (ISSET(cmd->c_flags, SCF_CMD_READ)) { dx_desc = &sc->sc_rxdx->dx_desc[DMAC_DESC_DST]; dx_desc->xd_nsegs = cmd->c_dmamap->dm_nsegs; dx_desc->xd_dma_segs = cmd->c_dmamap->dm_segs; error = pxa2x0_dmac_start_xfer(sc->sc_rxdx); } else { dx_desc = &sc->sc_txdx->dx_desc[DMAC_DESC_SRC]; dx_desc->xd_nsegs = cmd->c_dmamap->dm_nsegs; dx_desc->xd_dma_segs = cmd->c_dmamap->dm_segs; /* workaround for erratum #91 */ error = 0; if (!CPU_IS_PXA270) { error = pxa2x0_dmac_start_xfer(sc->sc_txdx); } } if (error) { aprint_error_dev(sc->sc_dev, "couldn't start dma xfer. (error=%d)\n", error); cmd->c_error = EIO; goto err; } } else { DPRINTF(1,("%s: using PIO\n",device_xname(sc->sc_dev))); cmd->c_resid = cmd->c_datalen; cmd->c_buf = cmd->c_data; pxamci_enable_intr(sc, MMC_I_RXFIFO_RD_REQ | MMC_I_TXFIFO_WR_REQ | MMC_I_DAT_ERR); } } sc->sc_cmd = cmd; /* * "After reset, the MMC card must be initialized by sending * 80 clocks to it on the MMCLK signal." [15.4.3.2] */ if (!ISSET(sc->sc_flags, PMF_CARDINITED)) { DPRINTF(1,("%s: first command\n", device_xname(sc->sc_dev))); cmdat |= CMDAT_INIT; SET(sc->sc_flags, PMF_CARDINITED); } /* Begin the transfer and start the bus clock. */ CSR_WRITE_4(sc, MMC_CMDAT, cmdat); CSR_WRITE_4(sc, MMC_CLKRT, sc->sc_clkrt); CSR_WRITE_4(sc, MMC_STRPCL, STRPCL_START); /* Wait for it to complete */ pxamci_enable_intr(sc, MMC_I_END_CMD_RES|MMC_I_RES_ERR); for (timo = EXECCMD_TIMO; (sc->sc_cmd == cmd) && (timo > 0); timo--) { tsleep(sc, PWAIT, "mmcmd", hz); } /* If it completed in time, SCF_ITSDONE is already set. */ if (sc->sc_cmd == cmd) { cmd->c_error = ETIMEDOUT; err: SET(cmd->c_flags, SCF_ITSDONE); sc->sc_cmd = NULL; goto out; } out: splx(s); DPRINTF(1,("%s: cmd %d done (flags=%08x error=%d)\n", device_xname(sc->sc_dev), cmd->c_opcode, cmd->c_flags, cmd->c_error)); } static void pxamci_card_enable_intr(sdmmc_chipset_handle_t sch, int enable) { struct pxamci_softc *sc = (struct pxamci_softc *)sch; if (enable) { pxamci_enable_intr(sc, MMC_I_SDIO_INT); } else { pxamci_disable_intr(sc, MMC_I_SDIO_INT); } } static void pxamci_card_intr_ack(sdmmc_chipset_handle_t sch) { /* Nothing to do */ } static void pxamci_stop_clock(struct pxamci_softc *sc) { int timo = STOPCLK_TIMO; if (ISSET(CSR_READ_4(sc, MMC_STAT), STAT_CLK_EN)) { CSR_CLR_4(sc, MMC_I_MASK, MMC_I_CLK_IS_OFF); CSR_WRITE_4(sc, MMC_STRPCL, STRPCL_STOP); while (ISSET(CSR_READ_4(sc, MMC_STAT), STAT_CLK_EN) && (timo-- > 0)) { tsleep(sc, PWAIT, "mmclk", hz); } } if (timo == 0) aprint_error_dev(sc->sc_dev, "clock stop timeout\n"); } /* * SD/MMC controller interrupt handler */ static int pxamci_intr(void *arg) { struct pxamci_softc *sc = arg; int status; #ifdef PXAMCI_DEBUG int ostatus; ostatus = #endif status = CSR_READ_4(sc, MMC_I_REG) & ~CSR_READ_4(sc, MMC_I_MASK); DPRINTF(10,("%s: intr status = %08x\n", device_xname(sc->sc_dev), status)); /* * Notify the process waiting in pxamci_clock_stop() when * the clock has really stopped. */ if (ISSET(status, MMC_I_CLK_IS_OFF)) { DPRINTF(2,("%s: clock is now off\n", device_xname(sc->sc_dev))); wakeup(sc); pxamci_disable_intr(sc, MMC_I_CLK_IS_OFF); CLR(status, MMC_I_CLK_IS_OFF); } if (sc->sc_cmd == NULL) goto end; if (ISSET(status, MMC_I_RES_ERR)) { DPRINTF(9, ("%s: handling MMC_I_RES_ERR\n", device_xname(sc->sc_dev))); pxamci_disable_intr(sc, MMC_I_RES_ERR); CLR(status, MMC_I_RES_ERR|MMC_I_END_CMD_RES); if (!ISSET(sc->sc_caps, PMC_CAPS_NO_DMA) && (sc->sc_cmd->c_datalen > 0) && DMA_ALIGNED(sc->sc_cmd->c_data)) { if (ISSET(sc->sc_cmd->c_flags, SCF_CMD_READ)) { pxa2x0_dmac_abort_xfer(sc->sc_rxdx); } else { pxa2x0_dmac_abort_xfer(sc->sc_txdx); } } sc->sc_cmd->c_error = ENOEXEC; pxamci_intr_done(sc); goto end; } if (ISSET(status, MMC_I_END_CMD_RES)) { DPRINTF(9,("%s: handling MMC_I_END_CMD_RES\n", device_xname(sc->sc_dev))); pxamci_intr_cmd(sc); pxamci_disable_intr(sc, MMC_I_END_CMD_RES); CLR(status, MMC_I_END_CMD_RES); /* ignore programming done condition */ if (ISSET(status, MMC_I_PRG_DONE)) { pxamci_disable_intr(sc, MMC_I_PRG_DONE); CLR(status, MMC_I_PRG_DONE); } if (sc->sc_cmd == NULL) goto end; } if (ISSET(status, MMC_I_DAT_ERR)) { DPRINTF(9, ("%s: handling MMC_I_DAT_ERR\n", device_xname(sc->sc_dev))); sc->sc_cmd->c_error = EIO; if (!ISSET(sc->sc_caps, PMC_CAPS_NO_DMA) && DMA_ALIGNED(sc->sc_cmd->c_data)) { if (ISSET(sc->sc_cmd->c_flags, SCF_CMD_READ)) { pxa2x0_dmac_abort_xfer(sc->sc_rxdx); } else { pxa2x0_dmac_abort_xfer(sc->sc_txdx); } } pxamci_intr_done(sc); pxamci_disable_intr(sc, MMC_I_DAT_ERR); CLR(status, MMC_I_DAT_ERR); /* ignore transmission done condition */ if (ISSET(status, MMC_I_DATA_TRAN_DONE)) { pxamci_disable_intr(sc, MMC_I_DATA_TRAN_DONE); CLR(status, MMC_I_DATA_TRAN_DONE); } goto end; } if (ISSET(status, MMC_I_DATA_TRAN_DONE)) { DPRINTF(9,("%s: handling MMC_I_DATA_TRAN_DONE\n", device_xname(sc->sc_dev))); pxamci_intr_done(sc); pxamci_disable_intr(sc, MMC_I_DATA_TRAN_DONE); CLR(status, MMC_I_DATA_TRAN_DONE); } if (ISSET(status, MMC_I_TXFIFO_WR_REQ|MMC_I_RXFIFO_RD_REQ)) { DPRINTF(10,("%s: handling MMC_I_xxFIFO_xx_REQ\n", device_xname(sc->sc_dev))); pxamci_intr_data(sc); CLR(status, MMC_I_TXFIFO_WR_REQ|MMC_I_RXFIFO_RD_REQ); } if (ISSET(status, STAT_SDIO_INT)) { DPRINTF(9,("%s: handling STAT_SDIO_INT\n", device_xname(sc->sc_dev))); sdmmc_card_intr(sc->sc_sdmmc); CLR(status, STAT_SDIO_INT); } end: /* Avoid further unhandled interrupts. */ if (status != 0) { pxamci_disable_intr(sc, status); #ifdef PXAMCI_DEBUG aprint_error_dev(sc->sc_dev, "unhandled interrupt 0x%x out of 0x%x\n", status, ostatus); #endif } return 1; } static void pxamci_intr_cmd(struct pxamci_softc *sc) { struct sdmmc_command *cmd = sc->sc_cmd; uint32_t status; int error; int i; KASSERT(sc->sc_cmd != NULL); #define STAT_ERR (STAT_READ_TIME_OUT \ | STAT_TIMEOUT_RESPONSE \ | STAT_CRC_WRITE_ERROR \ | STAT_CRC_READ_ERROR \ | STAT_SPI_READ_ERROR_TOKEN) if (ISSET(cmd->c_flags, SCF_RSP_136)) { for (i = 3; i >= 0; i--) { uint32_t h = CSR_READ_4(sc, MMC_RES) & 0xffff; uint32_t l = CSR_READ_4(sc, MMC_RES) & 0xffff; cmd->c_resp[i] = (h << 16) | l; } cmd->c_error = 0; } else if (ISSET(cmd->c_flags, SCF_RSP_PRESENT)) { /* * Grrr... The processor manual is not clear about * the layout of the response FIFO. It just states * that the FIFO is 16 bits wide, has a depth of 8, * and that the CRC is not copied into the FIFO. * * A 16-bit word in the FIFO is filled from highest * to lowest bit as the response comes in. The two * start bits and the 6 command index bits are thus * stored in the upper 8 bits of the first 16-bit * word that we read back from the FIFO. * * Since the sdmmc(4) framework expects the host * controller to discard the first 8 bits of the * response, what we must do is discard the upper * byte of the first 16-bit word. */ uint32_t h = CSR_READ_4(sc, MMC_RES) & 0xffff; uint32_t m = CSR_READ_4(sc, MMC_RES) & 0xffff; uint32_t l = CSR_READ_4(sc, MMC_RES) & 0xffff; cmd->c_resp[0] = (h << 24) | (m << 8) | (l >> 8); for (i = 1; i < 4; i++) cmd->c_resp[i] = 0; cmd->c_error = 0; } status = CSR_READ_4(sc, MMC_STAT); if (!ISSET(cmd->c_flags, SCF_RSP_PRESENT)) CLR(status, STAT_TIMEOUT_RESPONSE); /* XXX only for R6, not for R2 */ if (!ISSET(cmd->c_flags, SCF_RSP_IDX)) CLR(status, STAT_RES_CRC_ERR); if (ISSET(status, STAT_TIMEOUT_RESPONSE)) cmd->c_error = ETIMEDOUT; else if (ISSET(status, STAT_RES_CRC_ERR) && ISSET(cmd->c_flags, SCF_RSP_CRC) && CPU_IS_PXA270) { /* workaround for erratum #42 */ if (ISSET(cmd->c_flags, SCF_RSP_136) && (cmd->c_resp[0] & 0x80000000U)) { DPRINTF(1,("%s: ignore CRC error\n", device_xname(sc->sc_dev))); } else cmd->c_error = EIO; } else if (ISSET(status, STAT_ERR)) cmd->c_error = EIO; if (cmd->c_error == 0 && cmd->c_datalen > 0) { if (!ISSET(sc->sc_caps, PMC_CAPS_NO_DMA) && DMA_ALIGNED(cmd->c_data)) { /* workaround for erratum #91 */ if (CPU_IS_PXA270 && !ISSET(cmd->c_flags, SCF_CMD_READ)) { error = pxa2x0_dmac_start_xfer(sc->sc_txdx); if (error) { aprint_error_dev(sc->sc_dev, "couldn't start dma xfer." " (error=%d)\n", error); cmd->c_error = EIO; pxamci_intr_done(sc); return; } } pxamci_enable_intr(sc, MMC_I_DATA_TRAN_DONE|MMC_I_DAT_ERR); } } else { pxamci_intr_done(sc); } } static void pxamci_intr_data(struct pxamci_softc *sc) { struct sdmmc_command *cmd = sc->sc_cmd; int intr; int n; DPRINTF(10,("%s: pxamci_intr_data: cmd = %p, resid = %d\n", device_xname(sc->sc_dev), cmd, cmd->c_resid)); n = MIN(32, cmd->c_resid); cmd->c_resid -= n; if (ISSET(cmd->c_flags, SCF_CMD_READ)) { intr = MMC_I_RXFIFO_RD_REQ; while (n-- > 0) *cmd->c_buf++ = CSR_READ_1(sc, MMC_RXFIFO); } else { int short_xfer = n < 32; intr = MMC_I_TXFIFO_WR_REQ; while (n-- > 0) CSR_WRITE_1(sc, MMC_TXFIFO, *cmd->c_buf++); if (short_xfer) CSR_WRITE_4(sc, MMC_PRTBUF, 1); } if (cmd->c_resid > 0) { pxamci_enable_intr(sc, intr); } else { pxamci_disable_intr(sc, intr); pxamci_enable_intr(sc, MMC_I_DATA_TRAN_DONE); } } /* * Wake up the process sleeping in pxamci_exec_command(). */ static void pxamci_intr_done(struct pxamci_softc *sc) { DPRINTF(1,("%s: pxamci_intr_done: mmc status = %#x\n", device_xname(sc->sc_dev), CSR_READ_4(sc, MMC_STAT))); pxamci_disable_intr(sc, MMC_I_TXFIFO_WR_REQ|MMC_I_RXFIFO_RD_REQ| MMC_I_DATA_TRAN_DONE|MMC_I_END_CMD_RES|MMC_I_RES_ERR|MMC_I_DAT_ERR); SET(sc->sc_cmd->c_flags, SCF_ITSDONE); sc->sc_cmd = NULL; wakeup(sc); } static void pxamci_dmac_iintr(struct dmac_xfer *dx, int status) { struct pxamci_softc *sc = dx->dx_cookie; DPRINTF(1,("%s: pxamci_dmac_iintr: status = %#x\n", device_xname(sc->sc_dev), status)); if (status) { aprint_error_dev(sc->sc_dev, "pxamci_dmac_iintr: " "non-zero completion status %d\n", status); } } static void pxamci_dmac_ointr(struct dmac_xfer *dx, int status) { struct pxamci_softc *sc = dx->dx_cookie; DPRINTF(1,("%s: pxamci_dmac_ointr: status = %#x\n", device_xname(sc->sc_dev), status)); if (status == 0) { if (sc->sc_cmd != NULL && (sc->sc_cmd->c_datalen & 31) != 0) { CSR_WRITE_4(sc, MMC_PRTBUF, 1); } } else { aprint_error_dev(sc->sc_dev, "pxamci_dmac_ointr: " "non-zero completion status %d\n", status); } }