mips/bcm47xx/serial.c

0001 /*
0002  * 8250 UART probe driver for the BCM47XX platforms
0003  * Author: Aurelien Jarno
0004  *
0005  * This file is subject to the terms and conditions of the GNU General Public
0006  * License.  See the file "COPYING" in the main directory of this archive
0007  * for more details.
0008  *
0009  * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
0010  */
0011
0012 #include <linux/init.h>
0013 #include <linux/serial.h>
0014 #include <linux/serial_8250.h>
0015 #include <linux/ssb/ssb.h>
0016 #include <bcm47xx.h>
0017
0018 static struct plat_serial8250_port uart8250_data[5];
0019
0020 static struct platform_device uart8250_device = {
0021     .name           = "serial8250",
0022     .id         = PLAT8250_DEV_PLATFORM,
0023     .dev            = {
0024         .platform_data  = uart8250_data,
0025     },
0026 };
0027
0028 #ifdef CONFIG_BCM47XX_SSB
0029 static int __init uart8250_init_ssb(void)
0030 {
0031     int i;
0032     struct ssb_mipscore *mcore = &(bcm47xx_bus.ssb.mipscore);
0033
0034     memset(&uart8250_data, 0,  sizeof(uart8250_data));
0035
0036     for (i = 0; i < mcore->nr_serial_ports &&
0037             i < ARRAY_SIZE(uart8250_data) - 1; i++) {
0038         struct plat_serial8250_port *p = &(uart8250_data[i]);
0039         struct ssb_serial_port *ssb_port = &(mcore->serial_ports[i]);
0040
0041         p->mapbase = (unsigned int)ssb_port->regs;
0042         p->membase = (void *)ssb_port->regs;
0043         p->irq = ssb_port->irq + 2;
0044         p->uartclk = ssb_port->baud_base;
0045         p->regshift = ssb_port->reg_shift;
0046         p->iotype = UPIO_MEM;
0047         p->flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
0048     }
0049     return platform_device_register(&uart8250_device);
0050 }
0051 #endif
0052
0053 #ifdef CONFIG_BCM47XX_BCMA
0054 static int __init uart8250_init_bcma(void)
0055 {
0056     int i;
0057     struct bcma_drv_cc *cc = &(bcm47xx_bus.bcma.bus.drv_cc);
0058
0059     memset(&uart8250_data, 0,  sizeof(uart8250_data));
0060
0061     for (i = 0; i < cc->nr_serial_ports &&
0062             i < ARRAY_SIZE(uart8250_data) - 1; i++) {
0063         struct plat_serial8250_port *p = &(uart8250_data[i]);
0064         struct bcma_serial_port *bcma_port;
0065         bcma_port = &(cc->serial_ports[i]);
0066
0067         p->mapbase = (unsigned int)bcma_port->regs;
0068         p->membase = (void *)bcma_port->regs;
0069         p->irq = bcma_port->irq;
0070         p->uartclk = bcma_port->baud_base;
0071         p->regshift = bcma_port->reg_shift;
0072         p->iotype = UPIO_MEM;
0073         p->flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
0074     }
0075     return platform_device_register(&uart8250_device);
0076 }
0077 #endif
0078
0079 static int __init uart8250_init(void)
0080 {
0081     switch (bcm47xx_bus_type) {
0082 #ifdef CONFIG_BCM47XX_SSB
0083     case BCM47XX_BUS_TYPE_SSB:
0084         return uart8250_init_ssb();
0085 #endif
0086 #ifdef CONFIG_BCM47XX_BCMA
0087     case BCM47XX_BUS_TYPE_BCMA:
0088         return uart8250_init_bcma();
0089 #endif
0090     }
0091     return -EINVAL;
0092 }
0093 device_initcall(uart8250_init);