xref: /linux/arch/mips/bcm47xx/serial.c (revision 4413e16d9d21673bb5048a2e542f1aaa00015c2e)
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; i++) {
35 		struct plat_serial8250_port *p = &(uart8250_data[i]);
36 		struct ssb_serial_port *ssb_port = &(mcore->serial_ports[i]);
37 
38 		p->mapbase = (unsigned int) ssb_port->regs;
39 		p->membase = (void *) ssb_port->regs;
40 		p->irq = ssb_port->irq + 2;
41 		p->uartclk = ssb_port->baud_base;
42 		p->regshift = ssb_port->reg_shift;
43 		p->iotype = UPIO_MEM;
44 		p->flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
45 	}
46 	return platform_device_register(&uart8250_device);
47 }
48 #endif
49 
50 #ifdef CONFIG_BCM47XX_BCMA
51 static int __init uart8250_init_bcma(void)
52 {
53 	int i;
54 	struct bcma_drv_cc *cc = &(bcm47xx_bus.bcma.bus.drv_cc);
55 
56 	memset(&uart8250_data, 0,  sizeof(uart8250_data));
57 
58 	for (i = 0; i < cc->nr_serial_ports; i++) {
59 		struct plat_serial8250_port *p = &(uart8250_data[i]);
60 		struct bcma_serial_port *bcma_port;
61 		bcma_port = &(cc->serial_ports[i]);
62 
63 		p->mapbase = (unsigned int) bcma_port->regs;
64 		p->membase = (void *) bcma_port->regs;
65 		p->irq = bcma_port->irq + 2;
66 		p->uartclk = bcma_port->baud_base;
67 		p->regshift = bcma_port->reg_shift;
68 		p->iotype = UPIO_MEM;
69 		p->flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
70 	}
71 	return platform_device_register(&uart8250_device);
72 }
73 #endif
74 
75 static int __init uart8250_init(void)
76 {
77 	switch (bcm47xx_bus_type) {
78 #ifdef CONFIG_BCM47XX_SSB
79 	case BCM47XX_BUS_TYPE_SSB:
80 		return uart8250_init_ssb();
81 #endif
82 #ifdef CONFIG_BCM47XX_BCMA
83 	case BCM47XX_BUS_TYPE_BCMA:
84 		return uart8250_init_bcma();
85 #endif
86 	}
87 	return -EINVAL;
88 }
89 
90 module_init(uart8250_init);
91 
92 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
93 MODULE_LICENSE("GPL");
94 MODULE_DESCRIPTION("8250 UART probe driver for the BCM47XX platforms");
95