/*- * Copyright (c) 2016, Hiroki Mori * Copyright (c) 2009, Oleksandr Tymoshenko * 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 unmodified, 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 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 AUTHOR 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "spibus_if.h" #include #include #undef AR531X_SPI_DEBUG #ifdef AR531X_SPI_DEBUG #define dprintf printf #else #define dprintf(x, arg...) #endif /* * register space access macros */ #define SPI_WRITE(sc, reg, val) do { \ bus_write_4(sc->sc_mem_res, (reg), (val)); \ } while (0) #define SPI_READ(sc, reg) bus_read_4(sc->sc_mem_res, (reg)) #define SPI_SET_BITS(sc, reg, bits) \ SPI_WRITE(sc, reg, SPI_READ(sc, (reg)) | (bits)) #define SPI_CLEAR_BITS(sc, reg, bits) \ SPI_WRITE(sc, reg, SPI_READ(sc, (reg)) & ~(bits)) struct ar5315_spi_softc { device_t sc_dev; struct resource *sc_mem_res; uint32_t sc_reg_ctrl; uint32_t sc_debug; }; static void ar5315_spi_attach_sysctl(device_t dev) { struct ar5315_spi_softc *sc; struct sysctl_ctx_list *ctx; struct sysctl_oid *tree; sc = device_get_softc(dev); ctx = device_get_sysctl_ctx(dev); tree = device_get_sysctl_tree(dev); SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "debug", CTLFLAG_RW, &sc->sc_debug, 0, "ar5315_spi debugging flags"); } static int ar5315_spi_probe(device_t dev) { device_set_desc(dev, "AR5315 SPI"); return (0); } static int ar5315_spi_attach(device_t dev) { struct ar5315_spi_softc *sc = device_get_softc(dev); int rid; sc->sc_dev = dev; rid = 0; sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); if (!sc->sc_mem_res) { device_printf(dev, "Could not map memory\n"); return (ENXIO); } device_add_child(dev, "spibus", -1); ar5315_spi_attach_sysctl(dev); return (bus_generic_attach(dev)); } static void ar5315_spi_chip_activate(struct ar5315_spi_softc *sc, int cs) { } static void ar5315_spi_chip_deactivate(struct ar5315_spi_softc *sc, int cs) { } static int ar5315_spi_get_block(off_t offset, caddr_t data, off_t count) { int i; for(i = 0; i < count / 4; ++i) { *((uint32_t *)data + i) = ATH_READ_REG(AR5315_MEM1_BASE + offset + i * 4); } // printf("ar5315_spi_get_blockr: %x %x %x\n", // (int)offset, (int)count, *(uint32_t *)data); return (0); } static int ar5315_spi_transfer(device_t dev, device_t child, struct spi_command *cmd) { struct ar5315_spi_softc *sc; uint8_t *buf_in, *buf_out; int lin, lout; uint32_t ctl, cnt, op, rdat, cs; int i, j; sc = device_get_softc(dev); if (sc->sc_debug & 0x8000) printf("ar5315_spi_transfer: CMD "); spibus_get_cs(child, &cs); cs &= ~SPIBUS_CS_HIGH; /* Open SPI controller interface */ ar5315_spi_chip_activate(sc, cs); do { ctl = SPI_READ(sc, ARSPI_REG_CTL); } while (ctl & ARSPI_CTL_BUSY); /* * Transfer command */ buf_out = (uint8_t *)cmd->tx_cmd; op = buf_out[0]; if(op == 0x0b) { int offset = buf_out[1] << 16 | buf_out[2] << 8 | buf_out[3]; ar5315_spi_get_block(offset, cmd->rx_data, cmd->rx_data_sz); return (0); } do { ctl = SPI_READ(sc, ARSPI_REG_CTL); } while (ctl & ARSPI_CTL_BUSY); if (sc->sc_debug & 0x8000) { printf("%08x ", op); printf("tx_cmd_sz=%d rx_cmd_sz=%d ", cmd->tx_cmd_sz, cmd->rx_cmd_sz); if(cmd->tx_cmd_sz != 1) { printf("%08x ", *((uint32_t *)cmd->tx_cmd)); printf("%08x ", *((uint32_t *)cmd->tx_cmd + 1)); } } SPI_WRITE(sc, ARSPI_REG_OPCODE, op); /* clear all of the tx and rx bits */ ctl &= ~(ARSPI_CTL_TXCNT_MASK | ARSPI_CTL_RXCNT_MASK); /* now set txcnt */ cnt = 1; ctl |= (cnt << ARSPI_CTL_TXCNT_SHIFT); cnt = 24; /* now set txcnt */ if(cmd->rx_cmd_sz < 24) cnt = cmd->rx_cmd_sz; ctl |= (cnt << ARSPI_CTL_RXCNT_SHIFT); ctl |= ARSPI_CTL_START; SPI_WRITE(sc, ARSPI_REG_CTL, ctl); if(op == 0x0b) SPI_WRITE(sc, ARSPI_REG_DATA, 0); if (sc->sc_debug & 0x8000) printf("\nDATA "); /* * Receive/transmit data (depends on command) */ // buf_out = (uint8_t *)cmd->tx_data; buf_in = (uint8_t *)cmd->rx_cmd; // lout = cmd->tx_data_sz; lin = cmd->rx_cmd_sz; if (sc->sc_debug & 0x8000) printf("t%d r%d ", lout, lin); for(i = 0; i <= (cnt - 1) / 4; ++i) { do { ctl = SPI_READ(sc, ARSPI_REG_CTL); } while (ctl & ARSPI_CTL_BUSY); rdat = SPI_READ(sc, ARSPI_REG_DATA); if (sc->sc_debug & 0x8000) printf("I%08x ", rdat); for(j = 0; j < 4; ++j) { buf_in[i * 4 + j + 1] = 0xff & (rdat >> (8 * j)); if(i * 4 + j + 2 == cnt) break; } } ar5315_spi_chip_deactivate(sc, cs); /* * Close SPI controller interface, restore flash memory mapped access. */ if (sc->sc_debug & 0x8000) printf("\n"); return (0); } static int ar5315_spi_detach(device_t dev) { struct ar5315_spi_softc *sc = device_get_softc(dev); if (sc->sc_mem_res) bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res); return (0); } static device_method_t ar5315_spi_methods[] = { /* Device interface */ DEVMETHOD(device_probe, ar5315_spi_probe), DEVMETHOD(device_attach, ar5315_spi_attach), DEVMETHOD(device_detach, ar5315_spi_detach), DEVMETHOD(spibus_transfer, ar5315_spi_transfer), // DEVMETHOD(spibus_get_block, ar5315_spi_get_block), DEVMETHOD_END }; static driver_t ar5315_spi_driver = { "spi", ar5315_spi_methods, sizeof(struct ar5315_spi_softc), }; static devclass_t ar5315_spi_devclass; DRIVER_MODULE(ar5315_spi, nexus, ar5315_spi_driver, ar5315_spi_devclass, 0, 0);