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author | gonzo <gonzo@FreeBSD.org> | 2009-04-19 22:56:35 +0000 |
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committer | gonzo <gonzo@FreeBSD.org> | 2009-04-19 22:56:35 +0000 |
commit | 75d47e36330a7994de3418ec9e1d0aa253346dc3 (patch) | |
tree | 94e217d8403198c20ed50d67b6436ccd9e24f04b /sys/mips/atheros/ar71xx_bus_space_reversed.c | |
parent | 3e1136f76b8ef94685bafc77846cb3263a0205af (diff) | |
download | FreeBSD-src-75d47e36330a7994de3418ec9e1d0aa253346dc3.zip FreeBSD-src-75d47e36330a7994de3418ec9e1d0aa253346dc3.tar.gz |
- Handle byte-order issue for non-word accesses to memory mapped
registers with ar71xx_bus_space_reversed. Note, that byte order
of values is handled by drivers. bus_spaces fixes only position
of register in word.
- Replace .hints hack for AR71XX UART with ar71xx_bus_space_reversed.
Diffstat (limited to 'sys/mips/atheros/ar71xx_bus_space_reversed.c')
-rw-r--r-- | sys/mips/atheros/ar71xx_bus_space_reversed.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/sys/mips/atheros/ar71xx_bus_space_reversed.c b/sys/mips/atheros/ar71xx_bus_space_reversed.c new file mode 100644 index 0000000..e03ade6 --- /dev/null +++ b/sys/mips/atheros/ar71xx_bus_space_reversed.c @@ -0,0 +1,181 @@ +/*- + * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org> + * 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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> + +#include <machine/bus.h> +#include <mips/atheros/ar71xx_bus_space_reversed.h> + +static bs_r_1_proto(reversed); +static bs_r_2_proto(reversed); +static bs_w_1_proto(reversed); +static bs_w_2_proto(reversed); + +/* + * Bus space that handles offsets in word for 1/2 bytes read/write access. + * Byte order of values is handled by device drivers itself. + */ +static struct bus_space bus_space_reversed = { + /* cookie */ + (void *) 0, + + /* mapping/unmapping */ + generic_bs_map, + generic_bs_unmap, + generic_bs_subregion, + + /* allocation/deallocation */ + NULL, + NULL, + + /* barrier */ + generic_bs_barrier, + + /* read (single) */ + reversed_bs_r_1, + reversed_bs_r_2, + generic_bs_r_4, + NULL, + + /* read multiple */ + generic_bs_rm_1, + generic_bs_rm_2, + generic_bs_rm_4, + NULL, + + /* read region */ + generic_bs_rr_1, + generic_bs_rr_2, + generic_bs_rr_4, + NULL, + + /* write (single) */ + reversed_bs_w_1, + reversed_bs_w_2, + generic_bs_w_4, + NULL, + + /* write multiple */ + generic_bs_wm_1, + generic_bs_wm_2, + generic_bs_wm_4, + NULL, + + /* write region */ + NULL, + generic_bs_wr_2, + generic_bs_wr_4, + NULL, + + /* set multiple */ + NULL, + NULL, + NULL, + NULL, + + /* set region */ + NULL, + generic_bs_sr_2, + generic_bs_sr_4, + NULL, + + /* copy */ + NULL, + generic_bs_c_2, + NULL, + NULL, + + /* read (single) stream */ + generic_bs_r_1, + generic_bs_r_2, + generic_bs_r_4, + NULL, + + /* read multiple stream */ + generic_bs_rm_1, + generic_bs_rm_2, + generic_bs_rm_4, + NULL, + + /* read region stream */ + generic_bs_rr_1, + generic_bs_rr_2, + generic_bs_rr_4, + NULL, + + /* write (single) stream */ + generic_bs_w_1, + generic_bs_w_2, + generic_bs_w_4, + NULL, + + /* write multiple stream */ + generic_bs_wm_1, + generic_bs_wm_2, + generic_bs_wm_4, + NULL, + + /* write region stream */ + NULL, + generic_bs_wr_2, + generic_bs_wr_4, + NULL, +}; + +bus_space_tag_t ar71xx_bus_space_reversed = &bus_space_reversed; + +static uint8_t +reversed_bs_r_1(void *t, bus_space_handle_t h, bus_size_t o) +{ + + return readb(h + (o &~ 3) + (3 - (o & 3))); +} + +static void +reversed_bs_w_1(void *t, bus_space_handle_t h, bus_size_t o, u_int8_t v) +{ + + writeb(h + (o &~ 3) + (3 - (o & 3)), v); +} + +static uint16_t +reversed_bs_r_2(void *t, bus_space_handle_t h, bus_size_t o) +{ + + return readw(h + (o &~ 3) + (2 - (o & 3))); +} + +static void +reversed_bs_w_2(void *t, bus_space_handle_t h, bus_size_t o, uint16_t v) +{ + + writew(h + (o &~ 3) + (2 - (o & 3)), v); +} |