| Message ID | 1456467780-8476-19-git-send-email-zhaoshenglong@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Fri, 26 Feb 2016, Shannon Zhao wrote: > From: Shannon Zhao <shannon.zhao@linaro.org> > > This adds a new function to initialize UART for ACPI on ARM. > > Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> > V5: fix coding style > --- > xen/arch/arm/setup.c | 2 +- > xen/drivers/char/arm-uart.c | 37 +++++++++++++++++++++++++++++++++++-- > xen/include/xen/serial.h | 2 +- > 3 files changed, 37 insertions(+), 4 deletions(-) > > diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c > index d4261e8..6d205a9 100644 > --- a/xen/arch/arm/setup.c > +++ b/xen/arch/arm/setup.c > @@ -768,7 +768,7 @@ void __init start_xen(unsigned long boot_phys_offset, > > gic_preinit(); > > - dt_uart_init(); > + arm_uart_init(); > console_init_preirq(); > console_init_ring(); > > diff --git a/xen/drivers/char/arm-uart.c b/xen/drivers/char/arm-uart.c > index 883e615..627746b 100644 > --- a/xen/drivers/char/arm-uart.c > +++ b/xen/drivers/char/arm-uart.c > @@ -1,7 +1,7 @@ > /* > * xen/drivers/char/arm-uart.c > * > - * Generic uart retrieved via the device tree > + * Generic uart retrieved via the device tree or ACPI > * > * Julien Grall <julien.grall@linaro.org> > * Copyright (c) 2013 Linaro Limited. > @@ -23,6 +23,7 @@ > #include <xen/device_tree.h> > #include <xen/serial.h> > #include <xen/errno.h> > +#include <xen/acpi.h> > > /* > * Configure UART port with a string: > @@ -35,7 +36,7 @@ > static char __initdata opt_dtuart[256] = ""; > string_param("dtuart", opt_dtuart); > > -void __init dt_uart_init(void) > +static void __init dt_uart_init(void) > { > struct dt_device_node *dev; > int ret; > @@ -96,6 +97,38 @@ void __init dt_uart_init(void) > printk("Unable to initialize dtuart: %d\n", ret); > } > > +#ifdef CONFIG_ACPI > +static void __init acpi_uart_init(void) > +{ > + struct acpi_table_spcr *spcr = NULL; > + int ret; > + > + acpi_get_table(ACPI_SIG_SPCR, 0, (struct acpi_table_header **)&spcr); > + > + if ( spcr == NULL ) > + { > + printk("Unable to get spcr table\n"); > + } > + else > + { > + ret = acpi_device_init(DEVICE_SERIAL, NULL, spcr->interface_type); > + > + if ( ret ) > + printk("Unable to initialize acpi uart: %d\n", ret); > + } > +} > +#else > +static void __init acpi_uart_init(void) { } > +#endif > + > +void __init arm_uart_init(void) > +{ > + if ( acpi_disabled ) > + dt_uart_init(); > + else > + acpi_uart_init(); > +} > + > /* > * Local variables: > * mode: C > diff --git a/xen/include/xen/serial.h b/xen/include/xen/serial.h > index 71e6ade..1212a12 100644 > --- a/xen/include/xen/serial.h > +++ b/xen/include/xen/serial.h > @@ -170,7 +170,7 @@ struct ns16550_defaults { > void ns16550_init(int index, struct ns16550_defaults *defaults); > void ehci_dbgp_init(void); > > -void __init dt_uart_init(void); > +void arm_uart_init(void); > > struct physdev_dbgp_op; > int dbgp_op(const struct physdev_dbgp_op *); > -- > 2.0.4 > >
diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c index d4261e8..6d205a9 100644 --- a/xen/arch/arm/setup.c +++ b/xen/arch/arm/setup.c @@ -768,7 +768,7 @@ void __init start_xen(unsigned long boot_phys_offset, gic_preinit(); - dt_uart_init(); + arm_uart_init(); console_init_preirq(); console_init_ring(); diff --git a/xen/drivers/char/arm-uart.c b/xen/drivers/char/arm-uart.c index 883e615..627746b 100644 --- a/xen/drivers/char/arm-uart.c +++ b/xen/drivers/char/arm-uart.c @@ -1,7 +1,7 @@ /* * xen/drivers/char/arm-uart.c * - * Generic uart retrieved via the device tree + * Generic uart retrieved via the device tree or ACPI * * Julien Grall <julien.grall@linaro.org> * Copyright (c) 2013 Linaro Limited. @@ -23,6 +23,7 @@ #include <xen/device_tree.h> #include <xen/serial.h> #include <xen/errno.h> +#include <xen/acpi.h> /* * Configure UART port with a string: @@ -35,7 +36,7 @@ static char __initdata opt_dtuart[256] = ""; string_param("dtuart", opt_dtuart); -void __init dt_uart_init(void) +static void __init dt_uart_init(void) { struct dt_device_node *dev; int ret; @@ -96,6 +97,38 @@ void __init dt_uart_init(void) printk("Unable to initialize dtuart: %d\n", ret); } +#ifdef CONFIG_ACPI +static void __init acpi_uart_init(void) +{ + struct acpi_table_spcr *spcr = NULL; + int ret; + + acpi_get_table(ACPI_SIG_SPCR, 0, (struct acpi_table_header **)&spcr); + + if ( spcr == NULL ) + { + printk("Unable to get spcr table\n"); + } + else + { + ret = acpi_device_init(DEVICE_SERIAL, NULL, spcr->interface_type); + + if ( ret ) + printk("Unable to initialize acpi uart: %d\n", ret); + } +} +#else +static void __init acpi_uart_init(void) { } +#endif + +void __init arm_uart_init(void) +{ + if ( acpi_disabled ) + dt_uart_init(); + else + acpi_uart_init(); +} + /* * Local variables: * mode: C diff --git a/xen/include/xen/serial.h b/xen/include/xen/serial.h index 71e6ade..1212a12 100644 --- a/xen/include/xen/serial.h +++ b/xen/include/xen/serial.h @@ -170,7 +170,7 @@ struct ns16550_defaults { void ns16550_init(int index, struct ns16550_defaults *defaults); void ehci_dbgp_init(void); -void __init dt_uart_init(void); +void arm_uart_init(void); struct physdev_dbgp_op; int dbgp_op(const struct physdev_dbgp_op *);