8  * SPDX-License-Identifier:	GPL-2.0+
18 #include <asm/arch/uart.h>
34 	u8 port_id;     /* uart port number */
42  * 3 for 2, ... (2^n - 1) for n, instead, they suggest using these constants:
63 static void __maybe_unused s5p_serial_init(struct s5p_uart *uart)  in s5p_serial_init()  argument
66 	writel(0x3, &uart->ufcon);  in s5p_serial_init()
67 	writel(0, &uart->umcon);  in s5p_serial_init()
69 	writel(0x3, &uart->ulcon);  in s5p_serial_init()
71 	writel(0x245, &uart->ucon);  in s5p_serial_init()
74 static void __maybe_unused s5p_serial_baud(struct s5p_uart *uart, uint uclk,  in s5p_serial_baud()  argument
81 	writel(val / 16 - 1, &uart->ubrdiv);  in s5p_serial_baud()
84 		writew(udivslot[val % 16], &uart->rest.slot);  in s5p_serial_baud()
86 		writeb(val % 16, &uart->rest.value);  in s5p_serial_baud()
92 	struct s5p_serial_platdata *plat = dev->platdata;  in s5p_serial_setbrg()
93 	struct s5p_uart *const uart = plat->reg;  in s5p_serial_setbrg()  local
105 	uclk = get_uart_clk(plat->port_id);  in s5p_serial_setbrg()
108 	s5p_serial_baud(uart, uclk, baudrate);  in s5p_serial_setbrg()
115 	struct s5p_serial_platdata *plat = dev->platdata;  in s5p_serial_probe()
116 	struct s5p_uart *const uart = plat->reg;  in s5p_serial_probe()  local
118 	s5p_serial_init(uart);  in s5p_serial_probe()
123 static int serial_err_check(const struct s5p_uart *const uart, int op)  in serial_err_check()  argument
139 	return readl(&uart->uerstat) & mask;  in serial_err_check()
144 	struct s5p_serial_platdata *plat = dev->platdata;  in s5p_serial_getc()
145 	struct s5p_uart *const uart = plat->reg;  in s5p_serial_getc()  local
147 	if (!(readl(&uart->ufstat) & RX_FIFO_COUNT_MASK))  in s5p_serial_getc()
148 		return -EAGAIN;  in s5p_serial_getc()
150 	serial_err_check(uart, 0);  in s5p_serial_getc()
151 	return (int)(readb(&uart->urxh) & 0xff);  in s5p_serial_getc()
156 	struct s5p_serial_platdata *plat = dev->platdata;  in s5p_serial_putc()
157 	struct s5p_uart *const uart = plat->reg;  in s5p_serial_putc()  local
159 	if (readl(&uart->ufstat) & TX_FIFO_FULL)  in s5p_serial_putc()
160 		return -EAGAIN;  in s5p_serial_putc()
162 	writeb(ch, &uart->utxh);  in s5p_serial_putc()
163 	serial_err_check(uart, 1);  in s5p_serial_putc()
170 	struct s5p_serial_platdata *plat = dev->platdata;  in s5p_serial_pending()
171 	struct s5p_uart *const uart = plat->reg;  in s5p_serial_pending()  local
172 	uint32_t ufstat = readl(&uart->ufstat);  in s5p_serial_pending()
182 	struct s5p_serial_platdata *plat = dev->platdata;  in s5p_serial_ofdata_to_platdata()
187 		return -EINVAL;  in s5p_serial_ofdata_to_platdata()
189 	plat->reg = (struct s5p_uart *)addr;  in s5p_serial_ofdata_to_platdata()
190 	plat->port_id = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),  in s5p_serial_ofdata_to_platdata()
191 					"id", dev->seq);  in s5p_serial_ofdata_to_platdata()
203 	{ .compatible = "samsung,exynos4210-uart" },
225 	struct s5p_uart *uart = (struct s5p_uart *)CONFIG_DEBUG_UART_BASE;  in _debug_uart_init()  local
227 	s5p_serial_init(uart);  in _debug_uart_init()
228 	s5p_serial_baud(uart, CONFIG_DEBUG_UART_CLOCK, CONFIG_BAUDRATE);  in _debug_uart_init()
233 	struct s5p_uart *uart = (struct s5p_uart *)CONFIG_DEBUG_UART_BASE;  in _debug_uart_putc()  local
235 	while (readl(&uart->ufstat) & TX_FIFO_FULL);  in _debug_uart_putc()
237 	writeb(ch, &uart->utxh);  in _debug_uart_putc()