/* * Support for the w100 frame buffer. * * Copyright (c) 2004-2005 Richard Purdie * Copyright (c) 2005 Ian Molton * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #define W100_GPIO_PORT_A 0 #define W100_GPIO_PORT_B 1 #define CLK_SRC_XTAL 0 #define CLK_SRC_PLL 1 struct w100fb_par; unsigned long w100fb_gpio_read(int port); void w100fb_gpio_write(int port, unsigned long value); unsigned long w100fb_get_hsynclen(struct device *dev); /* LCD Specific Routines and Config */ struct w100_tg_info { void (*change)(struct w100fb_par*); void (*suspend)(struct w100fb_par*); void (*resume)(struct w100fb_par*); }; /* General Platform Specific w100 Register Values */ struct w100_gen_regs { unsigned long lcd_format; unsigned long lcdd_cntl1; unsigned long lcdd_cntl2; unsigned long genlcd_cntl1; unsigned long genlcd_cntl2; unsigned long genlcd_cntl3; }; struct w100_gpio_regs { unsigned long init_data1; unsigned long init_data2; unsigned long gpio_dir1; unsigned long gpio_oe1; unsigned long gpio_dir2; unsigned long gpio_oe2; }; /* Optional External Memory Configuration */ struct w100_mem_info { unsigned long ext_cntl; unsigned long sdram_mode_reg; unsigned long ext_timing_cntl; unsigned long io_cntl; unsigned int size; }; struct w100_bm_mem_info { unsigned long ext_mem_bw; unsigned long offset; unsigned long ext_timing_ctl; unsigned long ext_cntl; unsigned long mode_reg; unsigned long io_cntl; unsigned long config; }; /* LCD Mode definition */ struct w100_mode { unsigned int xres; unsigned int yres; unsigned short left_margin; unsigned short right_margin; unsigned short upper_margin; unsigned short lower_margin; unsigned long crtc_ss; unsigned long crtc_ls; unsigned long crtc_gs; unsigned long crtc_vpos_gs; unsigned long crtc_rev; unsigned long crtc_dclk; unsigned long crtc_gclk; unsigned long crtc_goe; unsigned long crtc_ps1_active; char pll_freq; char fast_pll_freq; int sysclk_src; int sysclk_divider; int pixclk_src; int pixclk_divider; int pixclk_divider_rotated; }; struct w100_pll_info { uint16_t freq; /* desired Fout for PLL (Mhz) */ uint8_t M; /* input divider */ uint8_t N_int; /* VCO multiplier */ uint8_t N_fac; /* VCO multiplier fractional part */ uint8_t tfgoal; uint8_t lock_time; }; /* Initial Video mode orientation flags */ #define INIT_MODE_ROTATED 0x1 #define INIT_MODE_FLIPPED 0x2 /* * This structure describes the machine which we are running on. * It is set by machine specific code and used in the probe routine * of drivers/video/w100fb.c */ struct w100fb_mach_info { /* General Platform Specific Registers */ struct w100_gen_regs *regs; /* Table of modes the LCD is capable of */ struct w100_mode *modelist; unsigned int num_modes; /* Hooks for any platform specific tg/lcd code (optional) */ struct w100_tg_info *tg; /* External memory definition (if present) */ struct w100_mem_info *mem; /* Additional External memory definition (if present) */ struct w100_bm_mem_info *bm_mem; /* GPIO definitions (optional) */ struct w100_gpio_regs *gpio; /* Initial Mode flags */ unsigned int init_mode; /* Xtal Frequency */ unsigned int xtal_freq; /* Enable Xtal input doubler (1 == enable) */ unsigned int xtal_dbl; }; /* General frame buffer data structure */ struct w100fb_par { unsigned int chip_id; unsigned int xres; unsigned int yres; unsigned int extmem_active; unsigned int flip; unsigned int blanked; unsigned int fastpll_mode; unsigned long hsync_len; struct w100_mode *mode; struct w100_pll_info *pll_table; struct w100fb_mach_info *mach; uint32_t *saved_intmem; uint32_t *saved_extmem; }; context:space:mode:
authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-02-01 17:45:02 +0000
committerIngo Molnar <mingo@kernel.org>2017-02-01 21:17:49 +0100
commitc8f325a59cfc718d13a50fbc746ed9b415c25e92 (patch)
treed53fbdac9d0781e39a13b2ac6b2bd258cf3b4140 /drivers/usb/gadget/udc/bdc/bdc.h
parentbf29bddf0417a4783da3b24e8c9e017ac649326f (diff)
efi/fdt: Avoid FDT manipulation after ExitBootServices()
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(), after which unaligned accesses to RAM are no longer supported. Commit: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") fixed an issue in the memory map handling of the stub FDT code, but inadvertently created an issue with such firmware, by moving some of the FDT manipulation to after the invocation of ExitBootServices(). Given that the stub's libfdt implementation uses the ordinary, accelerated string functions, which rely on hardware handling of unaligned accesses, manipulating the FDT with the MMU off may result in alignment faults. So fix the situation by moving the update_fdt_memmap() call into the callback function invoked by efi_exit_boot_services() right before it calls the ExitBootServices() UEFI service (which is arguably a better place for it anyway) Note that disabling the MMU in ExitBootServices() is not compliant with the UEFI spec, and carries great risk due to the fact that switching from cached to uncached memory accesses halfway through compiler generated code (i.e., involving a stack) can never be done in a way that is architecturally safe. Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Riku Voipio <riku.voipio@linaro.org> Cc: <stable@vger.kernel.org> Cc: mark.rutland@arm.com Cc: linux-efi@vger.kernel.org Cc: matt@codeblueprint.co.uk Cc: leif.lindholm@linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/usb/gadget/udc/bdc/bdc.h')