/*- * Copyright (c) 2013 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 "locators.h" #include __KERNEL_RCSID(1, "$NetBSD: awin_com.c,v 1.10 2015/08/08 23:30:16 tnn Exp $"); #include #include #include #include #include #include #include #include #include #include static int awin_com_match(device_t, cfdata_t, void *); static void awin_com_attach(device_t, device_t, void *); struct awin_com_softc { struct com_softc asc_sc; void *asc_ih; }; static const struct awin_gpio_pinset awin_com_pinsets[] = { { 'B', AWIN_PIO_PB_UART0_FUNC, AWIN_PIO_PB_UART0_PINS }, { 'A', AWIN_PIO_PA_UART1_FUNC, AWIN_PIO_PA_UART1_PINS }, { 'I', AWIN_PIO_PI_UART2_FUNC, AWIN_PIO_PI_UART2_PINS }, { 'H', AWIN_PIO_PH_UART3_FUNC, AWIN_PIO_PH_UART3_PINS }, { 'H', AWIN_PIO_PH_UART4_FUNC, AWIN_PIO_PH_UART4_PINS }, { 'H', AWIN_PIO_PH_UART5_FUNC, AWIN_PIO_PH_UART5_PINS }, { 'I', AWIN_PIO_PI_UART6_FUNC, AWIN_PIO_PI_UART6_PINS }, { 'I', AWIN_PIO_PI_UART7_FUNC, AWIN_PIO_PI_UART7_PINS }, }; /* alternative pinnings */ static const struct awin_gpio_pinset awin_com_alt_pinsets[] = { { 'F', AWIN_PIO_PF_UART0_FUNC, AWIN_PIO_PF_UART0_PINS }, { 0, 0, 0}, { 'A', AWIN_PIO_PA_UART2_FUNC, AWIN_PIO_PA_UART2_PINS }, { 'G', AWIN_PIO_PG_UART3_FUNC, AWIN_PIO_PG_UART3_PINS }, { 'G', AWIN_PIO_PG_UART4_FUNC, AWIN_PIO_PG_UART4_PINS }, { 'I', AWIN_PIO_PI_UART5_FUNC, AWIN_PIO_PI_UART5_PINS }, { 'A', AWIN_PIO_PA_UART6_FUNC, AWIN_PIO_PA_UART6_PINS }, { 'A', AWIN_PIO_PA_UART7_FUNC, AWIN_PIO_PA_UART7_PINS }, }; static const struct awin_gpio_pinset awin_com_pinsets_a31[] = { { 'H', AWIN_A31_PIO_PH_UART0_FUNC, AWIN_A31_PIO_PH_UART0_PINS }, }; static const struct awin_gpio_pinset awin_com_pinsets_a80[] = { { 'H', AWIN_A80_PIO_PH_UART0_FUNC, AWIN_A80_PIO_PH_UART0_PINS }, }; CFATTACH_DECL_NEW(awin_com, sizeof(struct awin_com_softc), awin_com_match, awin_com_attach, NULL, NULL); static int awin_com_ports; static int awin_com_match(device_t parent, cfdata_t cf, void *aux) { struct awinio_attach_args * const aio = aux; const struct awin_locators * const loc = &aio->aio_loc; bus_space_tag_t iot = aio->aio_core_a4x_bst; bus_space_handle_t bsh; const struct awin_gpio_pinset *pinset; if (awin_chip_id() == AWIN_CHIP_ID_A31) { pinset = awin_com_pinsets_a31; } else if (awin_chip_id() == AWIN_CHIP_ID_A80) { pinset = awin_com_pinsets_a80; } else { pinset = loc->loc_port + ((cf->cf_flags & 1) ? awin_com_alt_pinsets : awin_com_pinsets); } KASSERT(!strcmp(cf->cf_name, loc->loc_name)); #if defined(ALLWINNER_A80) KASSERT(loc->loc_offset >= AWIN_A80_UART0_OFFSET); KASSERT(loc->loc_offset <= AWIN_A80_UART5_OFFSET); #else KASSERT(loc->loc_offset >= AWIN_UART0_OFFSET); KASSERT(loc->loc_offset <= AWIN_UART7_OFFSET); #endif KASSERT((loc->loc_offset & 0x3ff) == 0); KASSERT((awin_com_ports & __BIT(loc->loc_port)) == 0); KASSERT(cf->cf_loc[AWINIOCF_PORT] == AWINIOCF_PORT_DEFAULT || cf->cf_loc[AWINIOCF_PORT] == loc->loc_port); if (!awin_gpio_pinset_available(pinset)) return 0; if (com_is_console(iot, AWIN_CORE_PBASE + loc->loc_offset, NULL)) return 1; awin_gpio_pinset_acquire(pinset); bus_space_subregion(iot, aio->aio_core_bsh, loc->loc_offset / 4, loc->loc_size, &bsh); /* * Clock gating, soft reset */ if (awin_chip_id() == AWIN_CHIP_ID_A80) { awin_reg_set_clear(aio->aio_core_bst, aio->aio_ccm_bsh, AWIN_A80_CCU_SCLK_BUS_CLK_GATING4_REG, AWIN_A80_CCU_SCLK_BUS_CLK_GATING4_UART0 << loc->loc_port, 0); awin_reg_set_clear(aio->aio_core_bst, aio->aio_ccm_bsh, AWIN_A80_CCU_SCLK_BUS_SOFT_RST4_REG, AWIN_A80_CCU_SCLK_BUS_SOFT_RST4_UART0 << loc->loc_port, 0); } else { awin_reg_set_clear(aio->aio_core_bst, aio->aio_ccm_bsh, AWIN_APB1_GATING_REG, AWIN_APB_GATING1_UART0 << loc->loc_port, 0); if (awin_chip_id() == AWIN_CHIP_ID_A31) { awin_reg_set_clear(aio->aio_core_bst, aio->aio_ccm_bsh, AWIN_A31_APB2_RESET_REG, AWIN_A31_APB2_RESET_UART0_RST << loc->loc_port, 0); } } const int rv = comprobe1(iot, bsh); awin_gpio_pinset_release(pinset); return rv; } static void awin_com_attach(device_t parent, device_t self, void *aux) { cfdata_t cf = device_cfdata(self); struct awin_com_softc * const asc = device_private(self); struct com_softc * const sc = &asc->asc_sc; struct awinio_attach_args * const aio = aux; const struct awin_locators * const loc = &aio->aio_loc; bus_space_tag_t iot = aio->aio_core_a4x_bst; const bus_addr_t iobase = AWIN_CORE_PBASE + loc->loc_offset; const struct awin_gpio_pinset *pinset; bus_space_handle_t ioh; if (awin_chip_id() == AWIN_CHIP_ID_A31) { pinset = awin_com_pinsets_a31; } else if (awin_chip_id() == AWIN_CHIP_ID_A80) { pinset = awin_com_pinsets_a80; } else { pinset = loc->loc_port + ((cf->cf_flags & 1) ? awin_com_alt_pinsets : awin_com_pinsets); } awin_com_ports |= __BIT(loc->loc_port); awin_gpio_pinset_acquire(pinset); sc->sc_dev = self; sc->sc_frequency = AWIN_UART_FREQ; sc->sc_type = COM_TYPE_NORMAL; if (com_is_console(iot, iobase, &ioh) == 0 && bus_space_subregion(iot, aio->aio_core_bsh, loc->loc_offset / 4, loc->loc_size, &ioh)) { panic(": can't map registers"); } COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase); com_attach_subr(sc); aprint_naive("\n"); KASSERT(loc->loc_intr != AWINIO_INTR_DEFAULT); asc->asc_ih = intr_establish(loc->loc_intr, IPL_SERIAL, IST_EDGE | IST_MPSAFE, comintr, sc); if (asc->asc_ih == NULL) panic("%s: failed to establish interrupt %d", device_xname(self), loc->loc_intr); }