diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/tty/serial/of_serial.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/tty/serial/of_serial.c | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/ANDROID_3.4.5/drivers/tty/serial/of_serial.c b/ANDROID_3.4.5/drivers/tty/serial/of_serial.c deleted file mode 100644 index e8c9cee0..00000000 --- a/ANDROID_3.4.5/drivers/tty/serial/of_serial.c +++ /dev/null @@ -1,207 +0,0 @@ -/* - * Serial Port driver for Open Firmware platform devices - * - * Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>, IBM Corp. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - */ -#include <linux/init.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/serial_core.h> -#include <linux/serial_8250.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> -#include <linux/of_platform.h> -#include <linux/nwpserial.h> - -struct of_serial_info { - int type; - int line; -}; - -/* - * Fill a struct uart_port for a given device node - */ -static int __devinit of_platform_serial_setup(struct platform_device *ofdev, - int type, struct uart_port *port) -{ - struct resource resource; - struct device_node *np = ofdev->dev.of_node; - u32 clk, spd, prop; - int ret; - - memset(port, 0, sizeof *port); - if (of_property_read_u32(np, "clock-frequency", &clk)) { - dev_warn(&ofdev->dev, "no clock-frequency property set\n"); - return -ENODEV; - } - /* If current-speed was set, then try not to change it. */ - if (of_property_read_u32(np, "current-speed", &spd) == 0) - port->custom_divisor = clk / (16 * spd); - - ret = of_address_to_resource(np, 0, &resource); - if (ret) { - dev_warn(&ofdev->dev, "invalid address\n"); - return ret; - } - - spin_lock_init(&port->lock); - port->mapbase = resource.start; - - /* Check for shifted address mapping */ - if (of_property_read_u32(np, "reg-offset", &prop) == 0) - port->mapbase += prop; - - /* Check for registers offset within the devices address range */ - if (of_property_read_u32(np, "reg-shift", &prop) == 0) - port->regshift = prop; - - port->irq = irq_of_parse_and_map(np, 0); - port->iotype = UPIO_MEM; - if (of_property_read_u32(np, "reg-io-width", &prop) == 0) { - switch (prop) { - case 1: - port->iotype = UPIO_MEM; - break; - case 4: - port->iotype = UPIO_MEM32; - break; - default: - dev_warn(&ofdev->dev, "unsupported reg-io-width (%d)\n", - prop); - return -EINVAL; - } - } - - port->type = type; - port->uartclk = clk; - port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP - | UPF_FIXED_PORT | UPF_FIXED_TYPE; - port->dev = &ofdev->dev; - - return 0; -} - -/* - * Try to register a serial port - */ -static struct of_device_id of_platform_serial_table[]; -static int __devinit of_platform_serial_probe(struct platform_device *ofdev) -{ - const struct of_device_id *match; - struct of_serial_info *info; - struct uart_port port; - int port_type; - int ret; - - match = of_match_device(of_platform_serial_table, &ofdev->dev); - if (!match) - return -EINVAL; - - if (of_find_property(ofdev->dev.of_node, "used-by-rtas", NULL)) - return -EBUSY; - - info = kmalloc(sizeof(*info), GFP_KERNEL); - if (info == NULL) - return -ENOMEM; - - port_type = (unsigned long)match->data; - ret = of_platform_serial_setup(ofdev, port_type, &port); - if (ret) - goto out; - - switch (port_type) { -#ifdef CONFIG_SERIAL_8250 - case PORT_8250 ... PORT_MAX_8250: - ret = serial8250_register_port(&port); - break; -#endif -#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL - case PORT_NWPSERIAL: - ret = nwpserial_register_port(&port); - break; -#endif - default: - /* need to add code for these */ - case PORT_UNKNOWN: - dev_info(&ofdev->dev, "Unknown serial port found, ignored\n"); - ret = -ENODEV; - break; - } - if (ret < 0) - goto out; - - info->type = port_type; - info->line = ret; - dev_set_drvdata(&ofdev->dev, info); - return 0; -out: - kfree(info); - irq_dispose_mapping(port.irq); - return ret; -} - -/* - * Release a line - */ -static int of_platform_serial_remove(struct platform_device *ofdev) -{ - struct of_serial_info *info = dev_get_drvdata(&ofdev->dev); - switch (info->type) { -#ifdef CONFIG_SERIAL_8250 - case PORT_8250 ... PORT_MAX_8250: - serial8250_unregister_port(info->line); - break; -#endif -#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL - case PORT_NWPSERIAL: - nwpserial_unregister_port(info->line); - break; -#endif - default: - /* need to add code for these */ - break; - } - kfree(info); - return 0; -} - -/* - * A few common types, add more as needed. - */ -static struct of_device_id __devinitdata of_platform_serial_table[] = { - { .compatible = "ns8250", .data = (void *)PORT_8250, }, - { .compatible = "ns16450", .data = (void *)PORT_16450, }, - { .compatible = "ns16550a", .data = (void *)PORT_16550A, }, - { .compatible = "ns16550", .data = (void *)PORT_16550, }, - { .compatible = "ns16750", .data = (void *)PORT_16750, }, - { .compatible = "ns16850", .data = (void *)PORT_16850, }, - { .compatible = "nvidia,tegra20-uart", .data = (void *)PORT_TEGRA, }, -#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL - { .compatible = "ibm,qpace-nwp-serial", - .data = (void *)PORT_NWPSERIAL, }, -#endif - { .type = "serial", .data = (void *)PORT_UNKNOWN, }, - { /* end of list */ }, -}; - -static struct platform_driver of_platform_serial_driver = { - .driver = { - .name = "of_serial", - .owner = THIS_MODULE, - .of_match_table = of_platform_serial_table, - }, - .probe = of_platform_serial_probe, - .remove = of_platform_serial_remove, -}; - -module_platform_driver(of_platform_serial_driver); - -MODULE_AUTHOR("Arnd Bergmann <arnd@arndb.de>"); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Serial Port driver for Open Firmware platform devices"); |