1 // SPDX-License-Identifier: GPL-2.0+
3  * (C) Copyright 2013-2016 Freescale Semiconductor, Inc.
13 #include <asm/arch/imx-regs.h>
45 	ibr = (u32) (clk / (16 * gd->baudrate));  in _linflex_serial_setbrg()
46 	fbr = (u32) (clk % (16 * gd->baudrate)) * 16;  in _linflex_serial_setbrg()
48 	__raw_writel(ibr, &base->linibrr);  in _linflex_serial_setbrg()
49 	__raw_writel(fbr, &base->linfbrr);  in _linflex_serial_setbrg()
56 	if (!(__raw_readb(&base->uartsr) & UARTSR_DRF))  in _linflex_serial_getc()
57 		return -EAGAIN;  in _linflex_serial_getc()
59 	if (!(__raw_readl(&base->uartsr) & UARTSR_RMB))  in _linflex_serial_getc()
60 		return -EAGAIN;  in _linflex_serial_getc()
62 	c = __raw_readl(&base->bdrm);  in _linflex_serial_getc()
63 	__raw_writeb((__raw_readb(&base->uartsr) | (UARTSR_DRF | UARTSR_RMB)),  in _linflex_serial_getc()
64 		     &base->uartsr);  in _linflex_serial_getc()
70 	__raw_writeb(c, &base->bdrl);  in _linflex_serial_putc()
73 	if (!(__raw_readb(&base->uartsr) & UARTSR_DTF))  in _linflex_serial_putc()
74 		return -EAGAIN;  in _linflex_serial_putc()
76 	__raw_writeb((__raw_readb(&base->uartsr) | UARTSR_DTF), &base->uartsr);  in _linflex_serial_putc()
87 	volatile u32 ctrl;  in _linflex_serial_init()  local
89 	/* set the Linflex in master mode amd activate by-pass filter */  in _linflex_serial_init()
90 	ctrl = LINCR1_BF | LINCR1_MME;  in _linflex_serial_init()
91 	__raw_writel(ctrl, &base->lincr1);  in _linflex_serial_init()
94 	ctrl |= LINCR1_INIT;  in _linflex_serial_init()
95 	__raw_writel(ctrl, &base->lincr1);  in _linflex_serial_init()
97 	/* waiting for init mode entry - TODO: add a timeout */  in _linflex_serial_init()
98 	while ((__raw_readl(&base->linsr) & LINSR_LINS_MASK) !=  in _linflex_serial_init()
102 	__raw_writel(UARTCR_UART, &base->uartcr);  in _linflex_serial_init()
109 		     | UARTCR_WL0 | UARTCR_UART, &base->uartcr);  in _linflex_serial_init()
111 	ctrl = __raw_readl(&base->lincr1);  in _linflex_serial_init()
112 	ctrl &= ~LINCR1_INIT;  in _linflex_serial_init()
113 	__raw_writel(ctrl, &base->lincr1);	/* end init mode */  in _linflex_serial_init()
127 int linflex_serial_setbrg(struct udevice *dev, int baudrate)  in linflex_serial_setbrg()  argument
129 	struct linflex_serial_priv *priv = dev_get_priv(dev);  in linflex_serial_setbrg()
131 	_linflex_serial_setbrg(priv->lfuart, baudrate);  in linflex_serial_setbrg()
136 static int linflex_serial_getc(struct udevice *dev)  in linflex_serial_getc()  argument
138 	struct linflex_serial_priv *priv = dev_get_priv(dev);  in linflex_serial_getc()
140 	return _linflex_serial_getc(priv->lfuart);  in linflex_serial_getc()
143 static int linflex_serial_putc(struct udevice *dev, const char ch)  in linflex_serial_putc()  argument
146 	struct linflex_serial_priv *priv = dev_get_priv(dev);  in linflex_serial_putc()
148 	return _linflex_serial_putc(priv->lfuart, ch);  in linflex_serial_putc()
151 static int linflex_serial_pending(struct udevice *dev, bool input)  in linflex_serial_pending()  argument
153 	struct linflex_serial_priv *priv = dev_get_priv(dev);  in linflex_serial_pending()
154 	uint32_t uartsr = __raw_readl(&priv->lfuart->uartsr);  in linflex_serial_pending()
169 static int linflex_serial_probe(struct udevice *dev)  in linflex_serial_probe()  argument
171 	struct linflex_serial_platdata *plat = dev->platdata;  in linflex_serial_probe()
172 	struct linflex_serial_priv *priv = dev_get_priv(dev);  in linflex_serial_probe()
174 	priv->lfuart = (struct linflex_fsl *)plat->base_addr;  in linflex_serial_probe()
175 	linflex_serial_init_internal(priv->lfuart);  in linflex_serial_probe()
212 	/* XXX: Is this OK? Should this use the non-DM version? */  in _debug_uart_putc()