diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/Kconfig | 15 | ||||
| -rw-r--r-- | drivers/serial/Makefile | 1 | ||||
| -rw-r--r-- | drivers/serial/ns16550.c | 42 | ||||
| -rw-r--r-- | drivers/serial/serial_meson.c | 162 | ||||
| -rw-r--r-- | drivers/serial/serial_s5p.c | 19 |
5 files changed, 211 insertions, 28 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 2497ae90a0..0e3890391b 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -121,6 +121,14 @@ config DEBUG_UART_S5P will need to provide parameters to make this work. The driver will be available until the real driver-model serial is running. +config DEBUG_UART_MESON + bool "Amlogic Meson" + depends on MESON_SERIAL + help + Select this to enable a debug UART using the serial_meson driver. You + will need to provide parameters to make this work. The driver will + be available until the real driver-model serial is running. + config DEBUG_UART_UARTLITE bool "Xilinx Uartlite" help @@ -338,6 +346,13 @@ config XILINX_UARTLITE If you have a Xilinx based board and want to use the uartlite serial ports, say Y to this option. If unsure, say N. +config MESON_SERIAL + bool "Support for Amlogic Meson UART" + depends on DM_SERIAL && ARCH_MESON + help + If you have an Amlogic Meson based board and want to use the on-chip + serial ports, say Y to this option. If unsure, say N. + config MSM_SERIAL bool "Qualcomm on-chip UART" depends on DM_SERIAL diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 9def128e89..e1e28ded30 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -27,6 +27,7 @@ obj-$(CONFIG_SYS_NS16550) += ns16550.o obj-$(CONFIG_S5P) += serial_s5p.o obj-$(CONFIG_MXC_UART) += serial_mxc.o obj-$(CONFIG_PXA_SERIAL) += serial_pxa.o +obj-$(CONFIG_MESON_SERIAL) += serial_meson.o obj-$(CONFIG_S3C24X0_SERIAL) += serial_s3c24x0.o obj-$(CONFIG_XILINX_UARTLITE) += serial_xuartlite.o obj-$(CONFIG_SANDBOX_SERIAL) += sandbox.o diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index 28da9ddfd8..c6cb3eb500 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -54,12 +54,6 @@ DECLARE_GLOBAL_DATA_PTR; #define CONFIG_SYS_NS16550_IER 0x00 #endif /* CONFIG_SYS_NS16550_IER */ -#ifdef CONFIG_DM_SERIAL - -#ifndef CONFIG_SYS_NS16550_CLK -#define CONFIG_SYS_NS16550_CLK 0 -#endif - static inline void serial_out_shift(void *addr, int shift, int value) { #ifdef CONFIG_SYS_NS16550_PORT_MAPPED @@ -94,13 +88,20 @@ static inline int serial_in_shift(void *addr, int shift) #endif } +#ifdef CONFIG_DM_SERIAL + +#ifndef CONFIG_SYS_NS16550_CLK +#define CONFIG_SYS_NS16550_CLK 0 +#endif + static void ns16550_writeb(NS16550_t port, int offset, int value) { struct ns16550_platdata *plat = port->plat; unsigned char *addr; offset *= 1 << plat->reg_shift; - addr = map_physmem(plat->base, 0, MAP_NOCACHE) + offset; + addr = (unsigned char *)plat->base + offset; + /* * As far as we know it doesn't make sense to support selection of * these options at run-time, so use the existing CONFIG options. @@ -114,7 +115,7 @@ static int ns16550_readb(NS16550_t port, int offset) unsigned char *addr; offset *= 1 << plat->reg_shift; - addr = map_physmem(plat->base, 0, MAP_NOCACHE) + offset; + addr = (unsigned char *)plat->base + offset; return serial_in_shift(addr + plat->reg_offset, plat->reg_shift); } @@ -128,27 +129,13 @@ static int ns16550_readb(NS16550_t port, int offset) (unsigned char *)addr - (unsigned char *)com_port) #endif -static inline int calc_divisor(NS16550_t port, int clock, int baudrate) +int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate) { const unsigned int mode_x_div = 16; return DIV_ROUND_CLOSEST(clock, mode_x_div * baudrate); } -int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate) -{ -#ifdef CONFIG_OMAP1510 - /* If can't cleanly clock 115200 set div to 1 */ - if ((clock == 12000000) && (baudrate == 115200)) { - port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */ - return 1; /* return 1 for base divisor */ - } - port->osc_12m_sel = 0; /* clear if previsouly set */ -#endif - - return calc_divisor(port, clock, baudrate); -} - static void NS16550_setbrg(NS16550_t com_port, int baud_divisor) { serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr); @@ -271,8 +258,8 @@ static inline void _debug_uart_init(void) * feasible. The better fix is to move all users of this driver to * driver model. */ - baud_divisor = calc_divisor(com_port, CONFIG_DEBUG_UART_CLOCK, - CONFIG_BAUDRATE); + baud_divisor = ns16550_calc_divisor(com_port, CONFIG_DEBUG_UART_CLOCK, + CONFIG_BAUDRATE); serial_dout(&com_port->ier, CONFIG_SYS_NS16550_IER); serial_dout(&com_port->mcr, UART_MCRVAL); serial_dout(&com_port->fcr, UART_FCRVAL); @@ -400,7 +387,12 @@ int ns16550_serial_ofdata_to_platdata(struct udevice *dev) if (addr == FDT_ADDR_T_NONE) return -EINVAL; +#ifdef CONFIG_SYS_NS16550_PORT_MAPPED plat->base = addr; +#else + plat->base = (unsigned long)map_physmem(addr, 0, MAP_NOCACHE); +#endif + plat->reg_offset = fdtdec_get_int(gd->fdt_blob, dev->of_offset, "reg-offset", 0); plat->reg_shift = fdtdec_get_int(gd->fdt_blob, dev->of_offset, diff --git a/drivers/serial/serial_meson.c b/drivers/serial/serial_meson.c new file mode 100644 index 0000000000..1b494265ce --- /dev/null +++ b/drivers/serial/serial_meson.c @@ -0,0 +1,162 @@ +/* + * (C) Copyright 2016 Beniamino Galvani <b.galvani@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <fdtdec.h> +#include <linux/compiler.h> +#include <serial.h> + +DECLARE_GLOBAL_DATA_PTR; + +struct meson_uart { + u32 wfifo; + u32 rfifo; + u32 control; + u32 status; + u32 misc; +}; + +struct meson_serial_platdata { + struct meson_uart *reg; +}; + +/* AML_UART_STATUS bits */ +#define AML_UART_PARITY_ERR BIT(16) +#define AML_UART_FRAME_ERR BIT(17) +#define AML_UART_TX_FIFO_WERR BIT(18) +#define AML_UART_RX_EMPTY BIT(20) +#define AML_UART_TX_FULL BIT(21) +#define AML_UART_TX_EMPTY BIT(22) +#define AML_UART_XMIT_BUSY BIT(25) +#define AML_UART_ERR (AML_UART_PARITY_ERR | \ + AML_UART_FRAME_ERR | \ + AML_UART_TX_FIFO_WERR) + +/* AML_UART_CONTROL bits */ +#define AML_UART_TX_EN BIT(12) +#define AML_UART_RX_EN BIT(13) +#define AML_UART_TX_RST BIT(22) +#define AML_UART_RX_RST BIT(23) +#define AML_UART_CLR_ERR BIT(24) + +static void meson_serial_init(struct meson_uart *uart) +{ + u32 val; + + val = readl(&uart->control); + val |= (AML_UART_RX_RST | AML_UART_TX_RST | AML_UART_CLR_ERR); + writel(val, &uart->control); + val &= ~(AML_UART_RX_RST | AML_UART_TX_RST | AML_UART_CLR_ERR); + writel(val, &uart->control); + val |= (AML_UART_RX_EN | AML_UART_TX_EN); + writel(val, &uart->control); +} + +static int meson_serial_probe(struct udevice *dev) +{ + struct meson_serial_platdata *plat = dev->platdata; + struct meson_uart *const uart = plat->reg; + + meson_serial_init(uart); + + return 0; +} + +static int meson_serial_getc(struct udevice *dev) +{ + struct meson_serial_platdata *plat = dev->platdata; + struct meson_uart *const uart = plat->reg; + + if (readl(&uart->status) & AML_UART_RX_EMPTY) + return -EAGAIN; + + return readl(&uart->rfifo) & 0xff; +} + +static int meson_serial_putc(struct udevice *dev, const char ch) +{ + struct meson_serial_platdata *plat = dev->platdata; + struct meson_uart *const uart = plat->reg; + + if (readl(&uart->status) & AML_UART_TX_FULL) + return -EAGAIN; + + writel(ch, &uart->wfifo); + + return 0; +} + +static int meson_serial_pending(struct udevice *dev, bool input) +{ + struct meson_serial_platdata *plat = dev->platdata; + struct meson_uart *const uart = plat->reg; + uint32_t status = readl(&uart->status); + + if (input) + return !(status & AML_UART_RX_EMPTY); + else + return !(status & AML_UART_TX_FULL); +} + +static int meson_serial_ofdata_to_platdata(struct udevice *dev) +{ + struct meson_serial_platdata *plat = dev->platdata; + fdt_addr_t addr; + + addr = dev_get_addr(dev); + if (addr == FDT_ADDR_T_NONE) + return -EINVAL; + + plat->reg = (struct meson_uart *)addr; + + return 0; +} + +static const struct dm_serial_ops meson_serial_ops = { + .putc = meson_serial_putc, + .pending = meson_serial_pending, + .getc = meson_serial_getc, +}; + +static const struct udevice_id meson_serial_ids[] = { + { .compatible = "amlogic,meson-uart" }, + { } +}; + +U_BOOT_DRIVER(serial_meson) = { + .name = "serial_meson", + .id = UCLASS_SERIAL, + .of_match = meson_serial_ids, + .probe = meson_serial_probe, + .ops = &meson_serial_ops, + .flags = DM_FLAG_PRE_RELOC, + .ofdata_to_platdata = meson_serial_ofdata_to_platdata, + .platdata_auto_alloc_size = sizeof(struct meson_serial_platdata), +}; + +#ifdef CONFIG_DEBUG_UART_MESON + +#include <debug_uart.h> + +static inline void _debug_uart_init(void) +{ +} + +static inline void _debug_uart_putc(int ch) +{ + struct meson_uart *regs = (struct meson_uart *)CONFIG_DEBUG_UART_BASE; + + while (readl(®s->status) & AML_UART_TX_FULL) + ; + + writel(ch, ®s->wfifo); +} + +DEBUG_UART_FUNCS + +#endif diff --git a/drivers/serial/serial_s5p.c b/drivers/serial/serial_s5p.c index feba467d80..cb55c5ab71 100644 --- a/drivers/serial/serial_s5p.c +++ b/drivers/serial/serial_s5p.c @@ -17,6 +17,7 @@ #include <asm/arch/clk.h> #include <asm/arch/uart.h> #include <serial.h> +#include <clk.h> DECLARE_GLOBAL_DATA_PTR; @@ -90,7 +91,19 @@ int s5p_serial_setbrg(struct udevice *dev, int baudrate) { struct s5p_serial_platdata *plat = dev->platdata; struct s5p_uart *const uart = plat->reg; - u32 uclk = get_uart_clk(plat->port_id); + u32 uclk; + +#ifdef CONFIG_CLK_EXYNOS + struct udevice *clk_dev; + u32 ret; + + ret = clk_get_by_index(dev, 1, &clk_dev); + if (ret < 0) + return ret; + uclk = clk_get_periph_rate(clk_dev, ret); +#else + uclk = get_uart_clk(plat->port_id); +#endif s5p_serial_baud(uart, uclk, baudrate); @@ -174,8 +187,8 @@ static int s5p_serial_ofdata_to_platdata(struct udevice *dev) return -EINVAL; plat->reg = (struct s5p_uart *)addr; - plat->port_id = fdtdec_get_int(gd->fdt_blob, dev->of_offset, "id", -1); - + plat->port_id = fdtdec_get_int(gd->fdt_blob, dev->of_offset, + "id", dev->seq); return 0; } |
