drivers/serial/serial_pxa.c

1 // SPDX-License-Identifier: GPL-2.0+
9  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
13  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
23 #include <asm/arch/pxa-regs.h>
24 #include <asm/arch/regs-uart.h>
69 	writel(0, &uart_regs->ier);  in pxa_setbrg_common()
70 	writel(0, &uart_regs->fcr);  in pxa_setbrg_common()
73 	writel(LCR_WLS0 | LCR_WLS1 | LCR_DLAB, &uart_regs->lcr);  in pxa_setbrg_common()
74 	writel(divider & 0xff, &uart_regs->dll);  in pxa_setbrg_common()
75 	writel(divider >> 8, &uart_regs->dlh);  in pxa_setbrg_common()
76 	writel(LCR_WLS0 | LCR_WLS1, &uart_regs->lcr);  in pxa_setbrg_common()
78 	/* Enable UART */  in pxa_setbrg_common()
79 	writel(IER_UUE, &uart_regs->ier);  in pxa_setbrg_common()
102 		panic("Failed getting UART registers\n");  in pxa_setbrg_dev()
104 	pxa_setbrg_common(uart_regs, uart_index, gd->baudrate);  in pxa_setbrg_dev()
132 	while (!(readl(&uart_regs->lsr) & LSR_TEMT))  in pxa_putc_dev()
134 	writel(c, &uart_regs->thr);  in pxa_putc_dev()
148 		return -1;  in pxa_tstc_dev()
150 	return readl(&uart_regs->lsr) & LSR_DR;  in pxa_tstc_dev()
164 		return -1;  in pxa_getc_dev()
166 	while (!(readl(&uart_regs->lsr) & LSR_DR))  in pxa_getc_dev()
168 	return readl(&uart_regs->rbr) & 0xff;  in pxa_getc_dev()
177 #define	pxa_uart(uart, UART)						\  argument
178 	int uart##_init(void)						\
180 		return pxa_init_dev(UART##_INDEX);			\
183 	void uart##_setbrg(void)					\
185 		return pxa_setbrg_dev(UART##_INDEX);			\
188 	void uart##_putc(const char c)					\
190 		return pxa_putc_dev(UART##_INDEX, c);			\
193 	void uart##_puts(const char *s)					\
195 		return pxa_puts_dev(UART##_INDEX, s);			\
198 	int uart##_getc(void)						\
200 		return pxa_getc_dev(UART##_INDEX);			\
203 	int uart##_tstc(void)						\
205 		return pxa_tstc_dev(UART##_INDEX);			\
208 #define	pxa_uart_desc(uart)						\  argument
209 	struct serial_device serial_##uart##_device =			\
211 		.name	= "serial_"#uart,				\
212 		.start	= uart##_init,					\
214 		.setbrg	= uart##_setbrg,				\
215 		.getc	= uart##_getc,					\
216 		.tstc	= uart##_tstc,					\
217 		.putc	= uart##_putc,					\
218 		.puts	= uart##_puts,					\
221 #define	pxa_uart_multi(uart, UART)					\  argument
222 	pxa_uart(uart, UART)						\
223 	pxa_uart_desc(uart)
270 	struct pxa_serial_platdata *plat = dev->platdata;  in pxa_serial_probe()
272 	pxa_setbrg_common((struct pxa_uart_regs *)plat->base, plat->port,  in pxa_serial_probe()
273 			  plat->baudrate);  in pxa_serial_probe()
279 	struct pxa_serial_platdata *plat = dev->platdata;  in pxa_serial_putc()
280 	struct pxa_uart_regs *uart_regs = (struct pxa_uart_regs *)plat->base;  in pxa_serial_putc()
283 	if (!(readl(&uart_regs->lsr) & LSR_TEMT))  in pxa_serial_putc()
284 		return -EAGAIN;  in pxa_serial_putc()
286 	writel(ch, &uart_regs->thr);  in pxa_serial_putc()
293 	struct pxa_serial_platdata *plat = dev->platdata;  in pxa_serial_getc()
294 	struct pxa_uart_regs *uart_regs = (struct pxa_uart_regs *)plat->base;  in pxa_serial_getc()
297 	if (!(readl(&uart_regs->lsr) & LSR_DR))  in pxa_serial_getc()
298 		return -EAGAIN;  in pxa_serial_getc()
300 	return readl(&uart_regs->rbr) & 0xff;  in pxa_serial_getc()
305 	struct pxa_serial_platdata *plat = dev->platdata;  in pxa_serial_setbrg()
306 	struct pxa_uart_regs *uart_regs = (struct pxa_uart_regs *)plat->base;  in pxa_serial_setbrg()
307 	int port = plat->port;  in pxa_serial_setbrg()
316 	struct pxa_serial_platdata *plat = dev->platdata;  in pxa_serial_pending()
317 	struct pxa_uart_regs *uart_regs = (struct pxa_uart_regs *)plat->base;  in pxa_serial_pending()
320 		return readl(&uart_regs->lsr) & LSR_DR ? 1 : 0;  in pxa_serial_pending()
322 		return readl(&uart_regs->lsr) & LSR_TEMT ? 0 : 1;  in pxa_serial_pending()