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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2015-07-29 11:45:52 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2015-07-31 08:49:43 +0200 |
| commit | 8d48e07c4d39a99b24e52ebab3deacc7e09d259b (patch) | |
| tree | cff837118bc515aee62101221bfd17ed0d02fc04 /include/serial | |
| parent | ca8a4b0ff52a7505d3970c2619a309a52f7479fc (diff) | |
| download | barebox-8d48e07c4d39a99b24e52ebab3deacc7e09d259b.tar.gz barebox-8d48e07c4d39a99b24e52ebab3deacc7e09d259b.tar.xz | |
ARM: i.MX: make early UART functions independent of DEBUG_LL
We have functions to setup the i.MX uart for early use, but these all
depend on DEBUG_LL. Move them to imx-uart.h to make them usable for
the regular PBL console.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include/serial')
| -rw-r--r-- | include/serial/imx-uart.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/include/serial/imx-uart.h b/include/serial/imx-uart.h index 7275e6ac38..d0e5bcc2b8 100644 --- a/include/serial/imx-uart.h +++ b/include/serial/imx-uart.h @@ -125,4 +125,44 @@ static inline int refclock_to_ubmr(int clock_hz) return clock_hz / 1600 - 1; } +static inline void imx_uart_setup(void __iomem *uartbase, + unsigned int refclock) +{ + writel(0x00000000, uartbase + UCR1); + + writel(UCR2_IRTS | UCR2_WS | UCR2_TXEN | UCR2_RXEN | UCR2_SRST, + uartbase + UCR2); + writel(UCR3_DSR | UCR3_DCD | UCR3_RI | UCR3_ADNIMP | UCR3_RXDMUXSEL, + uartbase + UCR3); + writel((0b10 << UFCR_TXTL_SHF) | UFCR_RFDIV1 | (1 << UFCR_RXTL_SHF), + uartbase + UFCR); + + writel(baudrate_to_ubir(CONFIG_BAUDRATE), + uartbase + UBIR); + writel(refclock_to_ubmr(refclock), + uartbase + UBMR); + + writel(UCR1_UARTEN, uartbase + UCR1); +} + +static inline void imx51_uart_setup(void __iomem *uartbase) +{ + imx_uart_setup(uartbase, 54000000); +} + +static inline void imx6_uart_setup(void __iomem *uartbase) +{ + imx_uart_setup(uartbase, 80000000); +} + +static inline void imx_uart_putc(void *base, int c) +{ + if (!(readl(base + UCR1) & UCR1_UARTEN)) + return; + + while (!(readl(base + USR2) & USR2_TXDC)); + + writel(c, base + URTX0); +} + #endif /* __IMX_UART_H__ */ |