diff options
author | Alexandru Gagniuc <mr.nuke.me@gmail.com> | 2013-12-13 20:44:48 -0600 |
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committer | Alexandru Gagniuc <mr.nuke.me@gmail.com> | 2014-01-08 22:54:08 +0100 |
commit | f64111b4865d611821950b25dc1ea235d8d9ca79 (patch) | |
tree | d61eef4c9476ada907f0d91e93c2707aed44df96 /src/cpu/allwinner/a10/pinmux.c | |
parent | 34286b861a9427520f3f3afb8bf64bfa7de37c24 (diff) |
cpu: Add initial support for Allwinner A10 SoC
Add minimal support needed to get a bootblock capable of initialising
a serial console.
Change-Id: I50dd85544549baf9c5ea0aa3b4296972136c02a4
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/4549
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/cpu/allwinner/a10/pinmux.c')
-rw-r--r-- | src/cpu/allwinner/a10/pinmux.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/cpu/allwinner/a10/pinmux.c b/src/cpu/allwinner/a10/pinmux.c new file mode 100644 index 0000000000..2525de58af --- /dev/null +++ b/src/cpu/allwinner/a10/pinmux.c @@ -0,0 +1,30 @@ +/* + * Helpers to multiplex and configure pins on Allwinner SoCs + * + * Copyright (C) 2013 Alexandru Gagniuc <mr.nuke.me@gmail.com> + * Subject to the GNU GPL v2, or (at your option) any later version. + */ + +#include "gpio.h" + +#include <arch/io.h> + +static struct a10_gpio *const gpio = (void *)GPIO_BASE; + +void gpio_set_func(u8 port, u8 pin, u8 pad_func) +{ + u8 reg, bit; + u32 reg32; + + if ((port > GPS)) + return; + + pin &= 0x1f; + reg = pin / 8; + bit = (pin % 8) * 4; + + reg32 = read32(&gpio->port[port].cfg[reg]); + reg32 &= ~(0xf << bit); + reg32 |= (pad_func & 0xf) << bit; + write32(reg32, &gpio->port[port].cfg[reg]); +} |