/* * Early serial console for 8250/16550 devices * * (c) Copyright 2004 Hewlett-Packard Development Company, L.P. * Bjorn Helgaas * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Based on the 8250.c serial driver, Copyright (C) 2001 Russell King, * and on early_printk.c by Andi Kleen. * * This is for use before the serial driver has initialized, in * particular, before the UARTs have been discovered and named. * Instead of specifying the console device as, e.g., "ttyS0", * we locate the device directly by its MMIO or I/O port address. * * The user can specify the device directly, e.g., * earlycon=uart8250,io,0x3f8,9600n8 * earlycon=uart8250,mmio,0xff5e0000,115200n8 * earlycon=uart8250,mmio32,0xff5e0000,115200n8 * or * console=uart8250,io,0x3f8,9600n8 * console=uart8250,mmio,0xff5e0000,115200n8 * console=uart8250,mmio32,0xff5e0000,115200n8 */ #include #include #include #include #include #include #include #include #include #include static unsigned int __init serial8250_early_in(struct uart_port *port, int offset) { offset <<= port->regshift; switch (port->iotype) { case UPIO_MEM: return readb(port->membase + offset); case UPIO_MEM16: return readw(port->membase + offset); case UPIO_MEM32: return readl(port->membase + offset); case UPIO_MEM32BE: return ioread32be(port->membase + offset); case UPIO_PORT: return inb(port->iobase + offset); default: return 0; } } static void __init serial8250_early_out(struct uart_port *port, int offset, int value) { offset <<= port->regshift; switch (port->iotype) { case UPIO_MEM: writeb(value, port->membase + offset); break; case UPIO_MEM16: writew(value, port->membase + offset); break; case UPIO_MEM32: writel(value, port->membase + offset); break; case UPIO_MEM32BE: iowrite32be(value, port->membase + offset); break; case UPIO_PORT: outb(value, port->iobase + offset); break; } } #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) static void __init serial_putc(struct uart_port *port, int c) { unsigned int status; serial8250_early_out(port, UART_TX, c); for (;;) { status = serial8250_early_in(port, UART_LSR); if ((status & BOTH_EMPTY) == BOTH_EMPTY) break; cpu_relax(); } } static void __init early_serial8250_write(struct console *console, const char *s, unsigned int count) { struct earlycon_device *device = console->data; struct uart_port *port = &device->port; uart_console_write(port, s, count, serial_putc); } static void __init init_port(struct earlycon_device *device) { struct uart_port *port = &device->port; unsigned int divisor; unsigned char c; unsigned int ier; serial8250_early_out(port, UART_LCR, 0x3); /* 8n1 */ ier = serial8250_early_in(port, UART_IER); serial8250_early_out(port, UART_IER, ier & UART_IER_UUE); /* no interrupt */ serial8250_early_out(port, UART_FCR, 0); /* no fifo */ serial8250_early_out(port, UART_MCR, 0x3); /* DTR + RTS */ divisor = DIV_ROUND_CLOSEST(port->uartclk, 16 * device->baud); c = serial8250_early_in(port, UART_LCR); serial8250_early_out(port, UART_LCR, c | UART_LCR_DLAB); serial8250_early_out(port, UART_DLL, divisor & 0xff); serial8250_early_out(port, UART_DLM, (divisor >> 8) & 0xff); serial8250_early_out(port, UART_LCR, c & ~UART_LCR_DLAB); } int __init early_serial8250_setup(struct earlycon_device *device, const char *options) { if (!(device->port.membase || device->port.iobase)) return -ENODEV; if (!device->baud) { struct uart_port *port = &device->port; unsigned int ier; /* assume the device was initialized, only mask interrupts */ ier = serial8250_early_in(port, UART_IER); serial8250_early_out(port, UART_IER, ier & UART_IER_UUE); } else init_port(device); device->con->write = early_serial8250_write; return 0; } EARLYCON_DECLARE(uart8250, early_serial8250_setup); EARLYCON_DECLARE(uart, early_serial8250_setup); OF_EARLYCON_DECLARE(ns16550, "ns16550", early_serial8250_setup); OF_EARLYCON_DECLARE(ns16550a, "ns16550a", early_serial8250_setup); OF_EARLYCON_DECLARE(uart, "nvidia,tegra20-uart", early_serial8250_setup); OF_EARLYCON_DECLARE(uart, "snps,dw-apb-uart", early_serial8250_setup); #ifdef CONFIG_SERIAL_8250_OMAP static int __init early_omap8250_setup(struct earlycon_device *device, const char *options) { struct uart_port *port = &device->port; if (!(device->port.membase || device->port.iobase)) return -ENODEV; port->regshift = 2; device->con->write = early_serial8250_write; return 0; } OF_EARLYCON_DECLARE(omap8250, "ti,omap2-uart", early_omap8250_setup); OF_EARLYCON_DECLARE(omap8250, "ti,omap3-uart", early_omap8250_setup); OF_EARLYCON_DECLARE(omap8250, "ti,omap4-uart", early_omap8250_setup); #endif t info' class='commit-info'> authorArnd Bergmann <arnd@arndb.de>2017-02-07 09:59:21 -0800 committerDmitry Torokhov <dmitry.torokhov@gmail.com>2017-02-07 14:31:45 -0800 commit413d37326700aaf708730b940b04192c36e13ef4 (patch) treeb31f87b933d437d7f1754dfb983f3b33b7296a2e /drivers/usb/musb/da8xx.c parent601bbbe0517303c9f8eb3d75e11d64efed1293c9 (diff)
Input: synaptics-rmi4 - select 'SERIO' when needed
With CONFIG_SERIO=m, we get a build error for the rmi4-f03 driver, added in linux-4.10: warning: (HID_RMI) selects RMI4_F03 which has unmet direct dependencies (!UML && INPUT && RMI4_CORE && (SERIO=y || RMI4_CORE=SERIO)) drivers/input/built-in.o: In function `rmi_f03_attention': rmi_f03.c:(.text+0xcfe0): undefined reference to `serio_interrupt' rmi_f03.c:(.text+0xd055): undefined reference to `serio_interrupt' drivers/input/built-in.o: In function `rmi_f03_remove': rmi_f03.c:(.text+0xd115): undefined reference to `serio_unregister_port' drivers/input/built-in.o: In function `rmi_f03_probe': rmi_f03.c:(.text+0xd209): undefined reference to `__serio_register_port' An earlier patch tried to fix this, but missed the HID_RMI driver that does a 'select' on the F03 backend. This adds a hidden Kconfig symbol that enforces 'serio' to be enabled when RMI4-F03 is, which covers all cases. Fixes: d7ddad0acc4a ("Input: synaptics-rmi4 - fix F03 build error when serio is module") Fixes: c5e8848fc98e ("Input: synaptics-rmi4 - add support for F03") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/usb/musb/da8xx.c')