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[SPARC64] sunhv: Use virtual-devices layer to get interrupt. 

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2006-02-13 20:43:02 -08:00
parent e77227eb4e
commit f4266ab45a
1 changed files with 67 additions and 6 deletions
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73
drivers/serial/sunhv.c
View File

@ -20,6 +20,8 @@
#include <asm/hypervisor.h>
#include <asm/spitfire.h>
#include <asm/vdev.h>
#include <asm/irq.h>
#if defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
@ -407,6 +409,60 @@ static void __init sunhv_console_init(void)
register_console(&sunhv_console);
}
static int __init hv_console_compatible(char *buf, int len)
{
while (len) {
int this_len;
if (!strcmp(buf, "qcn"))
return 1;
this_len = strlen(buf) + 1;
buf += this_len;
len -= this_len;
}
return 0;
}
static unsigned int __init get_interrupt(void)
{
const char *cons_str = "console";
const char *compat_str = "compatible";
int node = prom_getchild(sun4v_vdev_root);
unsigned int irq;
char buf[64];
int err, len;
node = prom_searchsiblings(node, cons_str);
if (!node)
return 0;
len = prom_getproplen(node, compat_str);
if (len == 0 || len == -1)
return 0;
err = prom_getproperty(node, compat_str, buf, 64);
if (err == -1)
return 0;
if (!hv_console_compatible(buf, len))
return 0;
/* Ok, the this is the OBP node for the sun4v hypervisor
* console device. Decode the interrupt.
*/
err = prom_getproperty(node, "interrupts",
(char *) &irq, sizeof(irq));
if (err == -1)
return 0;
return sun4v_build_irq(sun4v_vdev_devhandle, irq, 4, 0);
}
static u32 sunhv_irq;
static int __init sunhv_init(void)
{
struct uart_port *port;
@ -415,6 +471,10 @@ static int __init sunhv_init(void)
if (tlb_type != hypervisor)
return -ENODEV;
sunhv_irq = get_interrupt();
if (!sunhv_irq)
return -ENODEV;
port = kmalloc(sizeof(struct uart_port), GFP_KERNEL);
if (unlikely(!port))
return -ENOMEM;
@ -424,22 +484,23 @@ static int __init sunhv_init(void)
port->type = PORT_SUNHV;
port->uartclk = ( 29491200 / 16 ); /* arbitrary */
/* XXX Get interrupt. XXX */
if (request_irq(0 /* XXX */, sunhv_interrupt,
if (request_irq(sunhv_irq, sunhv_interrupt,
SA_SHIRQ, "serial(sunhv)", port)) {
printk("sunhv: Cannot get IRQ %x\n",
0 /* XXX */);
printk("sunhv: Cannot get IRQ %x\n", sunhv_irq);
kfree(port);
return -ENODEV;
}
printk("SUNHV: SUN4V virtual console, IRQ[%08x]\n",
sunhv_irq);
sunhv_reg.minor = sunserial_current_minor;
sunhv_reg.nr = 1;
sunhv_reg.cons = &sunhv_console;
ret = uart_register_driver(&sunhv_reg);
if (ret < 0) {
free_irq(0 /* XXX */, up);
free_irq(sunhv_irq, up);
kfree(port);
return ret;
@ -463,7 +524,7 @@ static void __exit sunhv_exit(void)
BUG_ON(!port);
uart_remove_one_port(&sunhv_reg, port);
free_irq(0 /* XXX */, port);
free_irq(sunhv_irq, port);
sunserial_current_minor -= 1;