diff options
| author | Patrick Georgi <pgeorgi@chromium.org> | 2016-02-08 21:17:12 +0100 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2016-02-09 21:53:42 +0100 |
| commit | d4adf58e03164615a64ba614d9353301ee8e7abd (patch) | |
| tree | f6ad5d41bdb7b03d8d465451659b6fb3f3502058 /payloads/libpayload/drivers/serial/8250.c | |
| parent | 42636a7a0cfeff36988fad97337a9d88e4f0e7b2 (diff) | |
libpayload: use 32bit access when accessing 4byte wide uart registers
This fixes serial on rk3288.
Change-Id: I3dbf3cc165e516ed7b0132332624f882c0c9b27f
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: https://review.coreboot.org/13636
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'payloads/libpayload/drivers/serial/8250.c')
| -rw-r--r-- | payloads/libpayload/drivers/serial/8250.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/payloads/libpayload/drivers/serial/8250.c b/payloads/libpayload/drivers/serial/8250.c index 7fe9920a6c..0386f23a57 100644 --- a/payloads/libpayload/drivers/serial/8250.c +++ b/payloads/libpayload/drivers/serial/8250.c @@ -46,7 +46,10 @@ static uint8_t serial_read_reg(int offset) return inb(IOBASE + offset); else #endif - return readb(MEMBASE + offset); + if (lib_sysinfo.serial->regwidth == 4) + return readl(MEMBASE + offset) & 0xff; + else + return readb(MEMBASE + offset); } static void serial_write_reg(uint8_t val, int offset) @@ -58,7 +61,10 @@ static void serial_write_reg(uint8_t val, int offset) outb(val, IOBASE + offset); else #endif - writeb(val, MEMBASE + offset); + if (lib_sysinfo.serial->regwidth == 4) + writel(val & 0xff, MEMBASE + offset); + else + writeb(val, MEMBASE + offset); } #if IS_ENABLED(CONFIG_LP_SERIAL_SET_SPEED) |