kernel/arch/mips/bcm47xx/serial.c

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