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- // 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_ofdata_to_platdata(struct udevice *dev)
- {
- struct ns16550_platdata *plat = dev->platdata;
- 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,
- .ofdata_to_platdata = omap_serial_ofdata_to_platdata,
- .platdata_auto_alloc_size = sizeof(struct ns16550_platdata),
- #endif
- .priv_auto_alloc_size = 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 */
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