diff options
Diffstat (limited to 'drivers/serial/sunhv.c')
| -rw-r--r-- | drivers/serial/sunhv.c | 73 |
1 files changed, 67 insertions, 6 deletions
diff --git a/drivers/serial/sunhv.c b/drivers/serial/sunhv.c index 2ba716eeb0bf..d3a9dd739da3 100644 --- a/drivers/serial/sunhv.c +++ b/drivers/serial/sunhv.c @@ -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; |