diff options
Diffstat (limited to 'roms/u-boot/drivers/serial/serial_omap.c')
| -rw-r--r-- | roms/u-boot/drivers/serial/serial_omap.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/serial/serial_omap.c b/roms/u-boot/drivers/serial/serial_omap.c new file mode 100644 index 000000000..2b23ece44 --- /dev/null +++ b/roms/u-boot/drivers/serial/serial_omap.c @@ -0,0 +1,171 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Texas Instruments' OMAP serial driver + * + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Lokesh Vutla <lokeshvutla@ti.com> + */ + +#include <common.h> +#include <dm.h> +#include <dt-structs.h> +#include <log.h> +#include <ns16550.h> +#include <serial.h> +#include <clk.h> +#include <linux/err.h> + +#ifndef CONFIG_SYS_NS16550_CLK +#define CONFIG_SYS_NS16550_CLK 0 +#endif + +#ifdef CONFIG_DEBUG_UART_OMAP + +#ifndef CONFIG_SYS_NS16550_IER +#define CONFIG_SYS_NS16550_IER 0x00 +#endif + +#define UART_MCRVAL 0x00 +#define UART_LCRVAL UART_LCR_8N1 + +static inline void serial_out_shift(void *addr, int shift, int value) +{ +#ifdef CONFIG_SYS_NS16550_PORT_MAPPED + outb(value, (ulong)addr); +#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_LITTLE_ENDIAN) + out_le32(addr, value); +#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN) + out_be32(addr, value); +#elif defined(CONFIG_SYS_NS16550_MEM32) + writel(value, addr); +#elif defined(CONFIG_SYS_BIG_ENDIAN) + writeb(value, addr + (1 << shift) - 1); +#else + writeb(value, addr); +#endif +} + +static inline int serial_in_shift(void *addr, int shift) +{ +#ifdef CONFIG_SYS_NS16550_PORT_MAPPED + return inb((ulong)addr); +#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_LITTLE_ENDIAN) + return in_le32(addr); +#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN) + return in_be32(addr); +#elif defined(CONFIG_SYS_NS16550_MEM32) + return readl(addr); +#elif defined(CONFIG_SYS_BIG_ENDIAN) + return readb(addr + (1 << shift) - 1); +#else + return readb(addr); +#endif +} + +#include <debug_uart.h> + +static inline void _debug_uart_init(void) +{ + struct ns16550 *com_port = (struct ns16550 *)CONFIG_DEBUG_UART_BASE; + int baud_divisor; + + 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->mdr1, 0x7); + serial_dout(&com_port->mcr, UART_MCRVAL); + serial_dout(&com_port->fcr, UART_FCR_DEFVAL); + + serial_dout(&com_port->lcr, UART_LCR_BKSE | UART_LCRVAL); + serial_dout(&com_port->dll, baud_divisor & 0xff); + serial_dout(&com_port->dlm, (baud_divisor >> 8) & 0xff); + serial_dout(&com_port->lcr, UART_LCRVAL); + serial_dout(&com_port->mdr1, 0x0); +} + +static inline void _debug_uart_putc(int ch) +{ + struct ns16550 *com_port = (struct ns16550 *)CONFIG_DEBUG_UART_BASE; + + while (!(serial_din(&com_port->lsr) & UART_LSR_THRE)) + ; + serial_dout(&com_port->thr, ch); +} + +DEBUG_UART_FUNCS + +#endif + +#if CONFIG_IS_ENABLED(DM_SERIAL) + +#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA) +static int omap_serial_of_to_plat(struct udevice *dev) +{ + struct ns16550_plat *plat = dev_get_plat(dev); + fdt_addr_t addr; + struct clk clk; + int err; + + /* try Processor Local Bus device first */ + addr = dev_read_addr(dev); + if (addr == FDT_ADDR_T_NONE) + return -EINVAL; + + plat->base = (unsigned long)map_physmem(addr, 0, MAP_NOCACHE); + + plat->reg_offset = dev_read_u32_default(dev, "reg-offset", 0); + plat->reg_shift = 2; + + err = clk_get_by_index(dev, 0, &clk); + if (!err) { + err = clk_get_rate(&clk); + if (!IS_ERR_VALUE(err)) + plat->clock = err; + } else if (err != -ENOENT && err != -ENODEV && err != -ENOSYS) { + debug("omap serial failed to get clock\n"); + return err; + } + + if (!plat->clock) + plat->clock = dev_read_u32_default(dev, "clock-frequency", + CONFIG_SYS_NS16550_CLK); + if (!plat->clock) { + debug("omap serial clock not defined\n"); + return -EINVAL; + } + + plat->fcr = UART_FCR_DEFVAL; + + return 0; +} + +static const struct udevice_id omap_serial_ids[] = { + { .compatible = "ti,omap2-uart", }, + { .compatible = "ti,omap3-uart", }, + { .compatible = "ti,omap4-uart", }, + { .compatible = "ti,am3352-uart", }, + { .compatible = "ti,am4372-uart", }, + { .compatible = "ti,dra742-uart", }, + { .compatible = "ti,am654-uart", }, + {} +}; +#endif /* OF_CONTROL && !OF_PLATDATA */ + +#if CONFIG_IS_ENABLED(SERIAL_PRESENT) +U_BOOT_DRIVER(omap_serial) = { + .name = "omap_serial", + .id = UCLASS_SERIAL, +#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA) + .of_match = omap_serial_ids, + .of_to_plat = omap_serial_of_to_plat, + .plat_auto = sizeof(struct ns16550_plat), +#endif + .priv_auto = sizeof(struct ns16550), + .probe = ns16550_serial_probe, + .ops = &ns16550_serial_ops, +#if !CONFIG_IS_ENABLED(OF_CONTROL) + .flags = DM_FLAG_PRE_RELOC, +#endif +}; +#endif +#endif /* DM_SERIAL */ |