>-----Original Message----- >From: Kevin Hilman [mailto:khilman@xxxxxxxxxxxxxxxxxxx] > >> This patch adds DEBUG_LL interface for Zoom2 board. >> The low level debug uart now points corrctly to External Quad uart >> controller on detachable debug board. >> >> The Quad uart is available over GPMC chip select with physical address >> 0x10000000. >> >> This physical address has been mapped to virtual address 0xFB000000 >> as per static mapping. > >I see you dropped the UPF_IOREMAP flag. Why do we need a static >mapping here? The early access will be taken care of by the .phys_io >field of the mach_desc, no? Step 1: The first early mapping happens with phys_io. Just for debug uart access. Step 2: This is over-written by mapping done by omap2_map_common_io -> iotable_init I removed the flag UPF_IOREMAP for the serial 8250 driver. If UPF_IOREMAP flag is given, then serial driver will do yet one more mapping, which is already done by step 2. Hence the flag is no longer needed for serial port mapping. > >Kevin > >> This patch is adapted from a version by Erik Gilling: >> http://android.git.kernel.org/?p=kernel/omap.git; >> a=commit;h=e9d72efdd88877d2d6ea74a08983ace0dcc771d3 >> >> Signed-off-by: Vikram Pandita <vikram.pandita@xxxxxx> >> Cc: Erik Gilling <konkers@xxxxxxxxxxx> >> --- >> arch/arm/mach-omap2/board-zoom-debugboard.c | 5 +++-- >> arch/arm/mach-omap2/board-zoom2.c | 19 +++++++++++++++++-- >> arch/arm/plat-omap/include/mach/io.h | 6 ++++++ >> 3 files changed, 26 insertions(+), 4 deletions(-) >> >> diff --git a/arch/arm/mach-omap2/board-zoom-debugboard.c b/arch/arm/mach-omap2/board-zoom- >debugboard.c >> index 1f13e2a..70a4bba 100644 >> --- a/arch/arm/mach-omap2/board-zoom-debugboard.c >> +++ b/arch/arm/mach-omap2/board-zoom-debugboard.c >> @@ -82,9 +82,10 @@ static inline void __init zoom2_init_smsc911x(void) >> >> static struct plat_serial8250_port serial_platform_data[] = { >> { >> - .mapbase = 0x10000000, >> + .membase = IOMEM(ZOOM2_EXT_QUART_VIRT), >> + .mapbase = ZOOM2_EXT_QUART_PHYS, >> .irq = OMAP_GPIO_IRQ(102), >> - .flags = UPF_BOOT_AUTOCONF|UPF_IOREMAP|UPF_SHARE_IRQ, >> + .flags = UPF_BOOT_AUTOCONF|UPF_SHARE_IRQ, >> .irqflags = IRQF_SHARED | IRQF_TRIGGER_RISING, >> .iotype = UPIO_MEM, >> .regshift = 1, >> diff --git a/arch/arm/mach-omap2/board-zoom2.c b/arch/arm/mach-omap2/board-zoom2.c >> index 324009e..467e961 100644 >> --- a/arch/arm/mach-omap2/board-zoom2.c >> +++ b/arch/arm/mach-omap2/board-zoom2.c >> @@ -19,10 +19,12 @@ >> >> #include <asm/mach-types.h> >> #include <asm/mach/arch.h> >> +#include <asm/mach/map.h> >> >> #include <mach/common.h> >> #include <mach/usb.h> >> #include <mach/keypad.h> >> +#include <mach/uncompress.h> >> >> #include "mmc-twl4030.h" >> >> @@ -269,15 +271,28 @@ static void __init omap_zoom2_init(void) >> usb_musb_init(); >> } >> >> +static struct map_desc zoom2_io_desc[] __initdata = { >> + { >> + .virtual = ZOOM2_EXT_QUART_VIRT, >> + .pfn = __phys_to_pfn(ZOOM2_EXT_QUART_PHYS), >> + .length = ZOOM2_EXT_QUART_SIZE, >> + .type = MT_DEVICE >> + } >> +}; >> + >> static void __init omap_zoom2_map_io(void) >> { >> omap2_set_globals_343x(); >> + >> + /* Map external quad UART virt to phy mapping */ >> + iotable_init(zoom2_io_desc, ARRAY_SIZE(zoom2_io_desc)); >> + >> omap2_map_common_io(); >> } >> >> MACHINE_START(OMAP_ZOOM2, "OMAP Zoom2 board") >> - .phys_io = 0x48000000, >> - .io_pg_offst = ((0xd8000000) >> 18) & 0xfffc, >> + .phys_io = ZOOM2_EXT_QUART_PHYS, >> + .io_pg_offst = ((ZOOM2_EXT_QUART_VIRT) >> 18) & 0xfffc, >> .boot_params = 0x80000100, >> .map_io = omap_zoom2_map_io, >> .init_irq = omap_zoom2_init_irq, >> diff --git a/arch/arm/plat-omap/include/mach/io.h b/arch/arm/plat-omap/include/mach/io.h >> index 8d32df3..d67f06c 100644 >> --- a/arch/arm/plat-omap/include/mach/io.h >> +++ b/arch/arm/plat-omap/include/mach/io.h >> @@ -169,6 +169,12 @@ >> #define DSP_MMU_34XX_VIRT 0xe2000000 >> #define DSP_MMU_34XX_SIZE SZ_4K >> >> +/* Map External Quad UART for Zoom2 board */ >> +#define ZOOM2_EXT_QUART_PHYS 0x10000000 /* PHY address if fixed */ >> +#define ZOOM2_EXT_QUART_PHY_TO_VIRT_OFF 0xEB000000 >> +#define ZOOM2_EXT_QUART_VIRT 0xFB000000 >> +#define ZOOM2_EXT_QUART_SIZE SZ_16 >> + >> /* >> * ---------------------------------------------------------------------------- >> * Omap4 specific IO mapping >> -- >> 1.6.3.3.334.g916e1 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-omap" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
