1 // SPDX-License-Identifier: GPL-2.0+
3  * (C) Copyright 2004-2007 Freescale Semiconductor, Inc.
4  * TsiChung Liew, Tsi-Chung.Liew@freescale.com.
29 	u32 counter;  in mcf_serial_init_common()  local
34 	writeb(UART_UCR_RESET_RX, &uart->ucr);  in mcf_serial_init_common()
35 	writeb(UART_UCR_RESET_TX, &uart->ucr);  in mcf_serial_init_common()
36 	writeb(UART_UCR_RESET_ERROR, &uart->ucr);  in mcf_serial_init_common()
37 	writeb(UART_UCR_RESET_MR, &uart->ucr);  in mcf_serial_init_common()
40 	writeb(0, &uart->uimr);  in mcf_serial_init_common()
43 	writeb(UART_UCSR_RCS_SYS_CLK | UART_UCSR_TCS_SYS_CLK, &uart->ucsr);  in mcf_serial_init_common()
45 	writeb(UART_UMR_BC_8 | UART_UMR_PM_NONE, &uart->umr);  in mcf_serial_init_common()
46 	writeb(UART_UMR_SB_STOP_BITS_1, &uart->umr);  in mcf_serial_init_common()
48 	/* Setting up BaudRate */  in mcf_serial_init_common()
49 	counter = (u32) ((gd->bus_clk / 32) + (baudrate / 2));  in mcf_serial_init_common()
50 	counter = counter / baudrate;  in mcf_serial_init_common()
52 	/* write to CTUR: divide counter upper byte */  in mcf_serial_init_common()
53 	writeb((u8)((counter & 0xff00) >> 8), &uart->ubg1);  in mcf_serial_init_common()
54 	/* write to CTLR: divide counter lower byte */  in mcf_serial_init_common()
55 	writeb((u8)(counter & 0x00ff), &uart->ubg2);  in mcf_serial_init_common()
57 	writeb(UART_UCR_RX_ENABLED | UART_UCR_TX_ENABLED, &uart->ucr);  in mcf_serial_init_common()
64 	u32 counter;  in mcf_serial_setbrg_common()  local
66 	/* Setting up BaudRate */  in mcf_serial_setbrg_common()
67 	counter = (u32) ((gd->bus_clk / 32) + (baudrate / 2));  in mcf_serial_setbrg_common()
68 	counter = counter / baudrate;  in mcf_serial_setbrg_common()
70 	/* write to CTUR: divide counter upper byte */  in mcf_serial_setbrg_common()
71 	writeb(((counter & 0xff00) >> 8), &uart->ubg1);  in mcf_serial_setbrg_common()
72 	/* write to CTLR: divide counter lower byte */  in mcf_serial_setbrg_common()
73 	writeb((counter & 0x00ff), &uart->ubg2);  in mcf_serial_setbrg_common()
75 	writeb(UART_UCR_RESET_RX, &uart->ucr);  in mcf_serial_setbrg_common()
76 	writeb(UART_UCR_RESET_TX, &uart->ucr);  in mcf_serial_setbrg_common()
78 	writeb(UART_UCR_RX_ENABLED | UART_UCR_TX_ENABLED, &uart->ucr);  in mcf_serial_setbrg_common()
91 	return mcf_serial_init_common(uart_base, port_idx, gd->baudrate);  in mcf_serial_init()
102 	while (!(readb(&uart->usr) & UART_USR_TXRDY))  in mcf_serial_putc()
105 	writeb(c, &uart->utb);  in mcf_serial_putc()
113 	while (!(readb(&uart->usr) & UART_USR_RXRDY))  in mcf_serial_getc()
116 	return readb(&uart->urb);  in mcf_serial_getc()
123 	mcf_serial_setbrg_common(uart, gd->baudrate);  in mcf_serial_setbrg()
130 	return readb(&uart->usr) & UART_USR_RXRDY;  in mcf_serial_tstc()
160 	struct coldfire_serial_platdata *plat = dev->platdata;  in coldfire_serial_probe()
162 	return mcf_serial_init_common((uart_t *)plat->base,  in coldfire_serial_probe()
163 						plat->port, plat->baudrate);  in coldfire_serial_probe()
168 	struct coldfire_serial_platdata *plat = dev->platdata;  in coldfire_serial_putc()
169 	uart_t *uart = (uart_t *)plat->base;  in coldfire_serial_putc()
172 	if (!(readb(&uart->usr) & UART_USR_TXRDY))  in coldfire_serial_putc()
173 		return -EAGAIN;  in coldfire_serial_putc()
175 	writeb(ch, &uart->utb);  in coldfire_serial_putc()
182 	struct coldfire_serial_platdata *plat = dev->platdata;  in coldfire_serial_getc()
183 	uart_t *uart = (uart_t *)(plat->base);  in coldfire_serial_getc()
186 	if (!(readb(&uart->usr) & UART_USR_RXRDY))  in coldfire_serial_getc()
187 		return -EAGAIN;  in coldfire_serial_getc()
189 	return readb(&uart->urb);  in coldfire_serial_getc()
194 	struct coldfire_serial_platdata *plat = dev->platdata;  in coldfire_serial_setbrg()
195 	uart_t *uart = (uart_t *)(plat->base);  in coldfire_serial_setbrg()
204 	struct coldfire_serial_platdata *plat = dev->platdata;  in coldfire_serial_pending()
205 	uart_t *uart = (uart_t *)(plat->base);  in coldfire_serial_pending()
208 		return readb(&uart->usr) & UART_USR_RXRDY ? 1 : 0;  in coldfire_serial_pending()
210 		return readb(&uart->usr) & UART_USR_TXRDY ? 0 : 1;  in coldfire_serial_pending()