LXR linux/arch/mips/bcm47xx/serial.c

   1/*
   2 * 8250 UART probe driver for the BCM47XX platforms
   3 * Author: Aurelien Jarno
   4 *
   5 * This file is subject to the terms and conditions of the GNU General Public
   6 * License.  See the file "COPYING" in the main directory of this archive
   7 * for more details.
   8 *
   9 * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
  10 */
  11
  12#include <linux/init.h>
  13#include <linux/serial.h>
  14#include <linux/serial_8250.h>
  15#include <linux/ssb/ssb.h>
  16#include <bcm47xx.h>
  17
  18static struct plat_serial8250_port uart8250_data[5];
  19
  20static struct platform_device uart8250_device = {
  21        .name                   = "serial8250",
  22        .id                     = PLAT8250_DEV_PLATFORM,
  23        .dev                    = {
  24                .platform_data  = uart8250_data,
  25        },
  26};
  27
  28#ifdef CONFIG_BCM47XX_SSB
  29static int __init uart8250_init_ssb(void)
  30{
  31        int i;
  32        struct ssb_mipscore *mcore = &(bcm47xx_bus.ssb.mipscore);
  33
  34        memset(&uart8250_data, 0,  sizeof(uart8250_data));
  35
  36        for (i = 0; i < mcore->nr_serial_ports &&
  37                    i < ARRAY_SIZE(uart8250_data) - 1; i++) {
  38                struct plat_serial8250_port *p = &(uart8250_data[i]);
  39                struct ssb_serial_port *ssb_port = &(mcore->serial_ports[i]);
  40
  41                p->mapbase = (unsigned int)ssb_port->regs;
  42                p->membase = (void *)ssb_port->regs;
  43                p->irq = ssb_port->irq + 2;
  44                p->uartclk = ssb_port->baud_base;
  45                p->regshift = ssb_port->reg_shift;
  46                p->iotype = UPIO_MEM;
  47                p->flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
  48        }
  49        return platform_device_register(&uart8250_device);
  50}
  51#endif
  52
  53#ifdef CONFIG_BCM47XX_BCMA
  54static int __init uart8250_init_bcma(void)
  55{
  56        int i;
  57        struct bcma_drv_cc *cc = &(bcm47xx_bus.bcma.bus.drv_cc);
  58
  59        memset(&uart8250_data, 0,  sizeof(uart8250_data));
  60
  61        for (i = 0; i < cc->nr_serial_ports &&
  62                    i < ARRAY_SIZE(uart8250_data) - 1; i++) {
  63                struct plat_serial8250_port *p = &(uart8250_data[i]);
  64                struct bcma_serial_port *bcma_port;
  65                bcma_port = &(cc->serial_ports[i]);
  66
  67                p->mapbase = (unsigned int)bcma_port->regs;
  68                p->membase = (void *)bcma_port->regs;
  69                p->irq = bcma_port->irq;
  70                p->uartclk = bcma_port->baud_base;
  71                p->regshift = bcma_port->reg_shift;
  72                p->iotype = UPIO_MEM;
  73                p->flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
  74        }
  75        return platform_device_register(&uart8250_device);
  76}
  77#endif
  78
  79static int __init uart8250_init(void)
  80{
  81        switch (bcm47xx_bus_type) {
  82#ifdef CONFIG_BCM47XX_SSB
  83        case BCM47XX_BUS_TYPE_SSB:
  84                return uart8250_init_ssb();
  85#endif
  86#ifdef CONFIG_BCM47XX_BCMA
  87        case BCM47XX_BUS_TYPE_BCMA:
  88                return uart8250_init_bcma();
  89#endif
  90        }
  91        return -EINVAL;
  92}
  93device_initcall(uart8250_init);
  94