/* $OpenBSD: combus.c,v 1.2 2010/10/26 00:02:01 syuu Exp $ */ /* * Copyright (c) 2000-2004 Opsycon AB (www.opsycon.se) * * 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. * */ /* * This is a combus, for OCTEON UART. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define com_lcr com_cfcr int combusmatch(struct device *, void *, void *); void combusattach(struct device *, struct device *, void *); int combusprint(void *, const char *); int combussubmatch(struct device *, void *, void *); u_int8_t combus_read_1(bus_space_tag_t, bus_space_handle_t, bus_size_t); u_int16_t combus_read_2(bus_space_tag_t, bus_space_handle_t, bus_size_t); u_int32_t combus_read_4(bus_space_tag_t, bus_space_handle_t, bus_size_t); u_int64_t combus_read_8(bus_space_tag_t, bus_space_handle_t, bus_size_t); void combus_write_1(bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int8_t); void combus_write_2(bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int16_t); void combus_write_4(bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int32_t); void combus_write_8(bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int64_t); void combus_read_raw_2(bus_space_tag_t, bus_space_handle_t, bus_addr_t, u_int8_t *, bus_size_t); void combus_write_raw_2(bus_space_tag_t, bus_space_handle_t, bus_addr_t, const u_int8_t *, bus_size_t); void combus_read_raw_4(bus_space_tag_t, bus_space_handle_t, bus_addr_t, u_int8_t *, bus_size_t); void combus_write_raw_4(bus_space_tag_t, bus_space_handle_t, bus_addr_t, const u_int8_t *, bus_size_t); void combus_read_raw_8(bus_space_tag_t, bus_space_handle_t, bus_addr_t, u_int8_t *, bus_size_t); void combus_write_raw_8(bus_space_tag_t, bus_space_handle_t, bus_addr_t, const u_int8_t *, bus_size_t); int combus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, bus_space_handle_t *); void combus_space_unmap(bus_space_tag_t, bus_space_handle_t, bus_size_t); int combus_space_region(bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_size_t, bus_space_handle_t *); void *combus_space_vaddr(bus_space_tag_t, bus_space_handle_t); bus_addr_t combus_pa_to_device(paddr_t); paddr_t combus_device_to_pa(bus_addr_t); bus_size_t combus_get_read_reg(bus_size_t); bus_size_t combus_get_write_reg(bus_size_t, u_int8_t); static int lcr = 0; struct cfattach combus_ca = { sizeof(struct device), combusmatch, combusattach }; struct cfdriver combus_cd = { NULL, "combus", DV_DULL }; bus_space_t combus_tag = { PHYS_TO_XKPHYS(0, CCA_NC), NULL, combus_read_1, combus_write_1, combus_read_2, combus_write_2, combus_read_4, combus_write_4, combus_read_8, combus_write_8, combus_read_raw_2, combus_write_raw_2, combus_read_raw_4, combus_write_raw_4, combus_read_raw_8, combus_write_raw_8, combus_space_map, combus_space_unmap, combus_space_region, combus_space_vaddr }; /* * List of combus child devices. */ #define COMBUSDEV(name, addr, i) \ { name, &combus_tag, &combus_tag, addr, i } struct combus_attach_args combus_children[] = { COMBUSDEV("com", OCTEON_UART0_BASE, CIU_INT_UART0), COMBUSDEV("com", OCTEON_UART1_BASE, CIU_INT_UART1), }; #undef COMBUSDEV /* * Match bus only to targets which have this bus. */ int combusmatch(struct device *parent, void *match, void *aux) { return (1); } int combusprint(void *aux, const char *combus) { struct combus_attach_args *cba = aux; if (combus != NULL) printf("%s at %s", cba->cba_name, combus); if (cba->cba_baseaddr != 0) printf(" base 0x%llx", cba->cba_baseaddr); if (cba->cba_intr >= 0) printf(" irq %d", cba->cba_intr); return (UNCONF); } int combussubmatch(struct device *parent, void *vcf, void *args) { struct cfdata *cf = vcf; struct combus_attach_args *cba = args; if (strcmp(cf->cf_driver->cd_name, cba->cba_name) != 0) return 0; if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != (int)cba->cba_baseaddr) return 0; return (*cf->cf_attach->ca_match)(parent, cf, cba); } void combusattach(struct device *parent, struct device *self, void *aux) { uint i; printf("\n"); /* * Attach subdevices. */ for (i = 0; i < nitems(combus_children); i++) config_found_sm(self, combus_children + i, combusprint, combussubmatch); } /* * Bus access primitives. These are really ugly... */ u_int8_t combus_read_1(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o) { o = combus_get_read_reg(o); return (u_int8_t)(volatile uint64_t)*(volatile uint64_t *)(h + o); } u_int16_t combus_read_2(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o) { panic(__func__); } u_int32_t combus_read_4(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o) { panic(__func__); } u_int64_t combus_read_8(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o) { panic(__func__); } void combus_write_1(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o, u_int8_t v) { o = combus_get_write_reg(o, 1); *(volatile uint64_t *)(h + o) = (volatile uint64_t)v; } void combus_write_2(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o, u_int16_t v) { panic(__func__); } void combus_write_4(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o, u_int32_t v) { panic(__func__); } void combus_write_8(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o, u_int64_t v) { panic(__func__); } void combus_read_raw_2(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t o, u_int8_t *buf, bus_size_t len) { panic(__func__); } void combus_write_raw_2(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t o, const u_int8_t *buf, bus_size_t len) { panic(__func__); } void combus_read_raw_4(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t o, u_int8_t *buf, bus_size_t len) { panic(__func__); } void combus_write_raw_4(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t o, const u_int8_t *buf, bus_size_t len) { panic(__func__); } void combus_read_raw_8(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t o, u_int8_t *buf, bus_size_t len) { panic(__func__); } void combus_write_raw_8(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t o, const u_int8_t *buf, bus_size_t len) { panic(__func__); } int combus_space_map(bus_space_tag_t t, bus_addr_t offs, bus_size_t size, int flags, bus_space_handle_t *bshp) { *bshp = t->bus_base + offs; return 0; } void combus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size) { } int combus_space_region(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp) { *nbshp = bsh + offset; return (0); } void * combus_space_vaddr(bus_space_tag_t t, bus_space_handle_t h) { return (void *)h; } /* * combus bus_dma helpers. */ bus_addr_t combus_pa_to_device(paddr_t pa) { return (bus_addr_t)pa; } paddr_t combus_device_to_pa(bus_addr_t addr) { return (paddr_t)addr; } bus_size_t combus_get_read_reg(bus_size_t o) { if (lcr && LCR_DLAB) switch(o) { case com_dlbl: return (bus_size_t)0x80; case com_dlbh: return (bus_size_t)0x88; } return (bus_size_t)(o << 3); } bus_size_t combus_get_write_reg(bus_size_t o, u_int8_t v) { if (o == com_lcr) lcr = v; switch(o) { case com_data: return (bus_size_t)0x40; case com_fifo: return (bus_size_t)0x50; } if (lcr && LCR_DLAB) switch(o) { case com_dlbl: return (bus_size_t)0x80; case com_dlbh: return (bus_size_t)0x88; } return (bus_size_t)(o << 3); }