mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-03 17:40:04 +00:00
dfdc1de642
Here is the big set of staging driver updates for 5.18-rc1.
Loads of tiny cleanups for almost all staging drivers in here, nothing
major at all. Highlights include:
- remove the ashmem Android driver. It is long-dead and if
there are any legacy userspace applications still using it,
the Android kernel images will maintain it, the community
shouldn't care about it anymore
- wfx wifi driver major cleanups. Should be ready to merge out
of staging soon, and will coordinate with the wifi maintainers
after -rc1 is out
- major cleanups and unwinding of the layers of the r8188eu
driver. It's amazing just how many unneeded layers of
abstraction is in there, just when we think it's done, another
is found...
- lots of tiny coding style cleanups in many other staging
drivers.
There will be merge conflict with a fbtft change and the spi driver
changes in your tree, but it's pretty obvious what to do (the function
shouldn't return anything.)
All have been in linux-next for a while with no reported problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver updates from Greg KH:
"Here is the big set of staging driver updates for 5.18-rc1.
Loads of tiny cleanups for almost all staging drivers in here, nothing
major at all. Highlights include:
- remove the ashmem Android driver. It is long-dead and if there are
any legacy userspace applications still using it, the Android
kernel images will maintain it, the community shouldn't care about
it anymore
- wfx wifi driver major cleanups. Should be ready to merge out of
staging soon, and will coordinate with the wifi maintainers after
-rc1 is out
- major cleanups and unwinding of the layers of the r8188eu driver.
It's amazing just how many unneeded layers of abstraction is in
there, just when we think it's done, another is found...
- lots of tiny coding style cleanups in many other staging drivers.
All have been in linux-next for a while with no reported problems"
* tag 'staging-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (455 commits)
staging: r8188eu: remove unnecessary memset in r8188eu
staging: greybus: introduce pwm_ops::apply
staging: rts5208: Resolve checkpatch.pl issues.
staging: sm750fb: fix naming style
staging: fbtft: Consider type of init sequence values in fbtft_init_display()
staging: fbtft: Constify buf parameter in fbtft_dbg_hex()
staging: mmal-vchiq: clear redundant item named bulk_scratch
mips: dts: ralink: add MT7621 SoC
staging: r8188eu: remove some unused local ieee80211 macros
staging: r8188eu: make rtl8188e_process_phy_info static
staging: r8188eu: remove unused function prototype
staging: r8188eu: remove three unused receive defines
staging: r8188eu: remove unnecessary initializations
staging: rtl8192e: Fix spelling mistake "RESQUEST" -> "REQUEST"
MAINTAINERS: remove the obsolete file entry for staging in ANDROID DRIVERS
staging: r8188eu: proper error handling in rtw_init_drv_sw
staging: r8188eu: call _cancel_timer_ex from _rtw_free_recv_priv
staging: vt6656: Removed unused variable vt3342_vnt_threshold
staging: vt6656: Removed unused variable bb_vga_0
staging: remove ashmem
...
444 lines
16 KiB
C
444 lines
16 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/* Copyright (C) 2013 Noralf Tronnes */
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#ifndef __LINUX_FBTFT_H
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#define __LINUX_FBTFT_H
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#include <linux/fb.h>
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#include <linux/spinlock.h>
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#include <linux/spi/spi.h>
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#include <linux/platform_device.h>
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#define FBTFT_ONBOARD_BACKLIGHT 2
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#define FBTFT_GPIO_NO_MATCH 0xFFFF
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#define FBTFT_GPIO_NAME_SIZE 32
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#define FBTFT_MAX_INIT_SEQUENCE 512
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#define FBTFT_GAMMA_MAX_VALUES_TOTAL 128
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#define FBTFT_OF_INIT_CMD BIT(24)
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#define FBTFT_OF_INIT_DELAY BIT(25)
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/**
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* struct fbtft_gpio - Structure that holds one pinname to gpio mapping
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* @name: pinname (reset, dc, etc.)
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* @gpio: GPIO number
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*
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*/
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struct fbtft_gpio {
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char name[FBTFT_GPIO_NAME_SIZE];
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struct gpio_desc *gpio;
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};
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struct fbtft_par;
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/**
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* struct fbtft_ops - FBTFT operations structure
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* @write: Writes to interface bus
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* @read: Reads from interface bus
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* @write_vmem: Writes video memory to display
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* @write_reg: Writes to controller register
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* @set_addr_win: Set the GRAM update window
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* @reset: Reset the LCD controller
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* @mkdirty: Marks display lines for update
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* @update_display: Updates the display
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* @init_display: Initializes the display
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* @blank: Blank the display (optional)
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* @request_gpios_match: Do pinname to gpio matching
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* @request_gpios: Request gpios from the kernel
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* @free_gpios: Free previously requested gpios
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* @verify_gpios: Verify that necessary gpios is present (optional)
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* @register_backlight: Used to register backlight device (optional)
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* @unregister_backlight: Unregister backlight device (optional)
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* @set_var: Configure LCD with values from variables like @rotate and @bgr
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* (optional)
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* @set_gamma: Set Gamma curve (optional)
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*
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* Most of these operations have default functions assigned to them in
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* fbtft_framebuffer_alloc()
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*/
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struct fbtft_ops {
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int (*write)(struct fbtft_par *par, void *buf, size_t len);
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int (*read)(struct fbtft_par *par, void *buf, size_t len);
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int (*write_vmem)(struct fbtft_par *par, size_t offset, size_t len);
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void (*write_register)(struct fbtft_par *par, int len, ...);
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void (*set_addr_win)(struct fbtft_par *par,
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int xs, int ys, int xe, int ye);
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void (*reset)(struct fbtft_par *par);
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void (*mkdirty)(struct fb_info *info, int from, int to);
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void (*update_display)(struct fbtft_par *par,
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unsigned int start_line, unsigned int end_line);
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int (*init_display)(struct fbtft_par *par);
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int (*blank)(struct fbtft_par *par, bool on);
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unsigned long (*request_gpios_match)(struct fbtft_par *par,
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const struct fbtft_gpio *gpio);
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int (*request_gpios)(struct fbtft_par *par);
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int (*verify_gpios)(struct fbtft_par *par);
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void (*register_backlight)(struct fbtft_par *par);
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void (*unregister_backlight)(struct fbtft_par *par);
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int (*set_var)(struct fbtft_par *par);
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int (*set_gamma)(struct fbtft_par *par, u32 *curves);
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};
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/**
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* struct fbtft_display - Describes the display properties
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* @width: Width of display in pixels
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* @height: Height of display in pixels
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* @regwidth: LCD Controller Register width in bits
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* @buswidth: Display interface bus width in bits
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* @backlight: Backlight type.
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* @fbtftops: FBTFT operations provided by driver or device (platform_data)
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* @bpp: Bits per pixel
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* @fps: Frames per second
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* @txbuflen: Size of transmit buffer
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* @init_sequence: Pointer to LCD initialization array
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* @gamma: String representation of Gamma curve(s)
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* @gamma_num: Number of Gamma curves
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* @gamma_len: Number of values per Gamma curve
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* @debug: Initial debug value
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*
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* This structure is not stored by FBTFT except for init_sequence.
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*/
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struct fbtft_display {
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unsigned int width;
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unsigned int height;
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unsigned int regwidth;
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unsigned int buswidth;
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unsigned int backlight;
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struct fbtft_ops fbtftops;
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unsigned int bpp;
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unsigned int fps;
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int txbuflen;
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const s16 *init_sequence;
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char *gamma;
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int gamma_num;
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int gamma_len;
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unsigned long debug;
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};
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/**
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* struct fbtft_platform_data - Passes display specific data to the driver
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* @display: Display properties
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* @gpios: Pointer to an array of pinname to gpio mappings
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* @rotate: Display rotation angle
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* @bgr: LCD Controller BGR bit
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* @fps: Frames per second (this will go away, use @fps in @fbtft_display)
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* @txbuflen: Size of transmit buffer
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* @startbyte: When set, enables use of Startbyte in transfers
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* @gamma: String representation of Gamma curve(s)
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* @extra: A way to pass extra info
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*/
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struct fbtft_platform_data {
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struct fbtft_display display;
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unsigned int rotate;
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bool bgr;
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unsigned int fps;
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int txbuflen;
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u8 startbyte;
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char *gamma;
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void *extra;
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};
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/**
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* struct fbtft_par - Main FBTFT data structure
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*
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* This structure holds all relevant data to operate the display
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*
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* See sourcefile for documentation since nested structs is not
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* supported by kernel-doc.
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*
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*/
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/* @spi: Set if it is a SPI device
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* @pdev: Set if it is a platform device
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* @info: Pointer to framebuffer fb_info structure
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* @pdata: Pointer to platform data
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* @ssbuf: Not used
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* @pseudo_palette: Used by fb_set_colreg()
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* @txbuf.buf: Transmit buffer
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* @txbuf.len: Transmit buffer length
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* @buf: Small buffer used when writing init data over SPI
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* @startbyte: Used by some controllers when in SPI mode.
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* Format: 6 bit Device id + RS bit + RW bit
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* @fbtftops: FBTFT operations provided by driver or device (platform_data)
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* @dirty_lock: Protects dirty_lines_start and dirty_lines_end
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* @dirty_lines_start: Where to begin updating display
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* @dirty_lines_end: Where to end updating display
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* @gpio.reset: GPIO used to reset display
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* @gpio.dc: Data/Command signal, also known as RS
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* @gpio.rd: Read latching signal
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* @gpio.wr: Write latching signal
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* @gpio.latch: Bus latch signal, eg. 16->8 bit bus latch
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* @gpio.cs: LCD Chip Select with parallel interface bus
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* @gpio.db[16]: Parallel databus
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* @gpio.led[16]: Led control signals
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* @gpio.aux[16]: Auxiliary signals, not used by core
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* @init_sequence: Pointer to LCD initialization array
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* @gamma.lock: Mutex for Gamma curve locking
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* @gamma.curves: Pointer to Gamma curve array
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* @gamma.num_values: Number of values per Gamma curve
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* @gamma.num_curves: Number of Gamma curves
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* @debug: Pointer to debug value
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* @current_debug:
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* @first_update_done: Used to only time the first display update
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* @update_time: Used to calculate 'fps' in debug output
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* @bgr: BGR mode/\n
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* @extra: Extra info needed by driver
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*/
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struct fbtft_par {
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struct spi_device *spi;
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struct platform_device *pdev;
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struct fb_info *info;
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struct fbtft_platform_data *pdata;
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u16 *ssbuf;
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u32 pseudo_palette[16];
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struct {
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void *buf;
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size_t len;
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} txbuf;
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u8 *buf;
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u8 startbyte;
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struct fbtft_ops fbtftops;
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spinlock_t dirty_lock;
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unsigned int dirty_lines_start;
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unsigned int dirty_lines_end;
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struct {
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struct gpio_desc *reset;
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struct gpio_desc *dc;
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struct gpio_desc *rd;
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struct gpio_desc *wr;
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struct gpio_desc *latch;
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struct gpio_desc *cs;
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struct gpio_desc *db[16];
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struct gpio_desc *led[16];
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struct gpio_desc *aux[16];
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} gpio;
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const s16 *init_sequence;
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struct {
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struct mutex lock;
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u32 *curves;
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int num_values;
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int num_curves;
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} gamma;
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unsigned long debug;
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bool first_update_done;
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ktime_t update_time;
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bool bgr;
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void *extra;
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bool polarity;
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};
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#define NUMARGS(...) (sizeof((int[]){__VA_ARGS__}) / sizeof(int))
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#define write_reg(par, ...) \
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((par)->fbtftops.write_register(par, NUMARGS(__VA_ARGS__), __VA_ARGS__))
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/* fbtft-core.c */
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int fbtft_write_buf_dc(struct fbtft_par *par, void *buf, size_t len, int dc);
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__printf(5, 6)
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void fbtft_dbg_hex(const struct device *dev, int groupsize,
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const void *buf, size_t len, const char *fmt, ...);
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struct fb_info *fbtft_framebuffer_alloc(struct fbtft_display *display,
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struct device *dev,
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struct fbtft_platform_data *pdata);
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void fbtft_framebuffer_release(struct fb_info *info);
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int fbtft_register_framebuffer(struct fb_info *fb_info);
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int fbtft_unregister_framebuffer(struct fb_info *fb_info);
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void fbtft_register_backlight(struct fbtft_par *par);
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void fbtft_unregister_backlight(struct fbtft_par *par);
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int fbtft_init_display(struct fbtft_par *par);
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int fbtft_probe_common(struct fbtft_display *display, struct spi_device *sdev,
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struct platform_device *pdev);
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void fbtft_remove_common(struct device *dev, struct fb_info *info);
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/* fbtft-io.c */
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int fbtft_write_spi(struct fbtft_par *par, void *buf, size_t len);
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int fbtft_write_spi_emulate_9(struct fbtft_par *par, void *buf, size_t len);
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int fbtft_read_spi(struct fbtft_par *par, void *buf, size_t len);
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int fbtft_write_gpio8_wr(struct fbtft_par *par, void *buf, size_t len);
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int fbtft_write_gpio16_wr(struct fbtft_par *par, void *buf, size_t len);
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int fbtft_write_gpio16_wr_latched(struct fbtft_par *par, void *buf, size_t len);
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/* fbtft-bus.c */
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int fbtft_write_vmem8_bus8(struct fbtft_par *par, size_t offset, size_t len);
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int fbtft_write_vmem16_bus16(struct fbtft_par *par, size_t offset, size_t len);
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int fbtft_write_vmem16_bus8(struct fbtft_par *par, size_t offset, size_t len);
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int fbtft_write_vmem16_bus9(struct fbtft_par *par, size_t offset, size_t len);
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void fbtft_write_reg8_bus8(struct fbtft_par *par, int len, ...);
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void fbtft_write_reg8_bus9(struct fbtft_par *par, int len, ...);
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void fbtft_write_reg16_bus8(struct fbtft_par *par, int len, ...);
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void fbtft_write_reg16_bus16(struct fbtft_par *par, int len, ...);
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#define FBTFT_DT_TABLE(_compatible) \
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static const struct of_device_id dt_ids[] = { \
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{ .compatible = _compatible }, \
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{}, \
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}; \
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MODULE_DEVICE_TABLE(of, dt_ids);
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#define FBTFT_SPI_DRIVER(_name, _compatible, _display, _spi_ids) \
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\
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static int fbtft_driver_probe_spi(struct spi_device *spi) \
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{ \
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return fbtft_probe_common(_display, spi, NULL); \
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} \
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\
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static void fbtft_driver_remove_spi(struct spi_device *spi) \
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{ \
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struct fb_info *info = spi_get_drvdata(spi); \
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\
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fbtft_remove_common(&spi->dev, info); \
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} \
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\
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static struct spi_driver fbtft_driver_spi_driver = { \
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.driver = { \
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.name = _name, \
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.of_match_table = dt_ids, \
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}, \
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.id_table = _spi_ids, \
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.probe = fbtft_driver_probe_spi, \
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.remove = fbtft_driver_remove_spi, \
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};
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#define FBTFT_REGISTER_DRIVER(_name, _compatible, _display) \
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\
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static int fbtft_driver_probe_pdev(struct platform_device *pdev) \
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{ \
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return fbtft_probe_common(_display, NULL, pdev); \
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} \
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\
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static int fbtft_driver_remove_pdev(struct platform_device *pdev) \
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{ \
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struct fb_info *info = platform_get_drvdata(pdev); \
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\
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fbtft_remove_common(&pdev->dev, info); \
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return 0; \
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} \
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\
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FBTFT_DT_TABLE(_compatible) \
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\
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FBTFT_SPI_DRIVER(_name, _compatible, _display, NULL) \
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\
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static struct platform_driver fbtft_driver_platform_driver = { \
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.driver = { \
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.name = _name, \
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.owner = THIS_MODULE, \
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.of_match_table = dt_ids, \
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}, \
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.probe = fbtft_driver_probe_pdev, \
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.remove = fbtft_driver_remove_pdev, \
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}; \
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\
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static int __init fbtft_driver_module_init(void) \
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{ \
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int ret; \
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\
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ret = spi_register_driver(&fbtft_driver_spi_driver); \
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if (ret < 0) \
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return ret; \
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ret = platform_driver_register(&fbtft_driver_platform_driver); \
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if (ret < 0) \
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spi_unregister_driver(&fbtft_driver_spi_driver); \
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return ret; \
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} \
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\
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static void __exit fbtft_driver_module_exit(void) \
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{ \
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spi_unregister_driver(&fbtft_driver_spi_driver); \
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platform_driver_unregister(&fbtft_driver_platform_driver); \
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} \
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\
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module_init(fbtft_driver_module_init); \
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module_exit(fbtft_driver_module_exit);
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#define FBTFT_REGISTER_SPI_DRIVER(_name, _comp_vend, _comp_dev, _display) \
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\
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FBTFT_DT_TABLE(_comp_vend "," _comp_dev) \
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\
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static const struct spi_device_id spi_ids[] = { \
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{ .name = _comp_dev }, \
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{}, \
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}; \
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MODULE_DEVICE_TABLE(spi, spi_ids); \
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\
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FBTFT_SPI_DRIVER(_name, _comp_vend "," _comp_dev, _display, spi_ids) \
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\
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module_spi_driver(fbtft_driver_spi_driver);
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/* Debug macros */
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/* shorthand debug levels */
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#define DEBUG_LEVEL_1 DEBUG_REQUEST_GPIOS
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#define DEBUG_LEVEL_2 (DEBUG_LEVEL_1 | DEBUG_DRIVER_INIT_FUNCTIONS \
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| DEBUG_TIME_FIRST_UPDATE)
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#define DEBUG_LEVEL_3 (DEBUG_LEVEL_2 | DEBUG_RESET | DEBUG_INIT_DISPLAY \
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| DEBUG_BLANK | DEBUG_REQUEST_GPIOS \
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| DEBUG_FREE_GPIOS \
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| DEBUG_VERIFY_GPIOS \
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| DEBUG_BACKLIGHT | DEBUG_SYSFS)
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#define DEBUG_LEVEL_4 (DEBUG_LEVEL_2 | DEBUG_FB_READ | DEBUG_FB_WRITE \
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| DEBUG_FB_FILLRECT \
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| DEBUG_FB_COPYAREA \
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| DEBUG_FB_IMAGEBLIT | DEBUG_FB_BLANK)
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#define DEBUG_LEVEL_5 (DEBUG_LEVEL_3 | DEBUG_UPDATE_DISPLAY)
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#define DEBUG_LEVEL_6 (DEBUG_LEVEL_4 | DEBUG_LEVEL_5)
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#define DEBUG_LEVEL_7 0xFFFFFFFF
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#define DEBUG_DRIVER_INIT_FUNCTIONS BIT(3)
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#define DEBUG_TIME_FIRST_UPDATE BIT(4)
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#define DEBUG_TIME_EACH_UPDATE BIT(5)
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#define DEBUG_DEFERRED_IO BIT(6)
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#define DEBUG_FBTFT_INIT_FUNCTIONS BIT(7)
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/* fbops */
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#define DEBUG_FB_READ BIT(8)
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#define DEBUG_FB_WRITE BIT(9)
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#define DEBUG_FB_FILLRECT BIT(10)
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#define DEBUG_FB_COPYAREA BIT(11)
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#define DEBUG_FB_IMAGEBLIT BIT(12)
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#define DEBUG_FB_SETCOLREG BIT(13)
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#define DEBUG_FB_BLANK BIT(14)
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#define DEBUG_SYSFS BIT(16)
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/* fbtftops */
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#define DEBUG_BACKLIGHT BIT(17)
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#define DEBUG_READ BIT(18)
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#define DEBUG_WRITE BIT(19)
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#define DEBUG_WRITE_VMEM BIT(20)
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#define DEBUG_WRITE_REGISTER BIT(21)
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#define DEBUG_SET_ADDR_WIN BIT(22)
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#define DEBUG_RESET BIT(23)
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#define DEBUG_MKDIRTY BIT(24)
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#define DEBUG_UPDATE_DISPLAY BIT(25)
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#define DEBUG_INIT_DISPLAY BIT(26)
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#define DEBUG_BLANK BIT(27)
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#define DEBUG_REQUEST_GPIOS BIT(28)
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#define DEBUG_FREE_GPIOS BIT(29)
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#define DEBUG_REQUEST_GPIOS_MATCH BIT(30)
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#define DEBUG_VERIFY_GPIOS BIT(31)
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#define fbtft_init_dbg(dev, format, arg...) \
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do { \
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if (unlikely((dev)->platform_data && \
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(((struct fbtft_platform_data *)(dev)->platform_data)->display.debug & DEBUG_DRIVER_INIT_FUNCTIONS))) \
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dev_info(dev, format, ##arg); \
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} while (0)
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#define fbtft_par_dbg(level, par, format, arg...) \
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do { \
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if (unlikely((par)->debug & (level))) \
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dev_info((par)->info->device, format, ##arg); \
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} while (0)
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#define fbtft_par_dbg_hex(level, par, dev, type, buf, num, format, arg...) \
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do { \
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if (unlikely((par)->debug & (level))) \
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fbtft_dbg_hex(dev, sizeof(type), buf,\
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(num) * sizeof(type), format, ##arg); \
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} while (0)
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#endif /* __LINUX_FBTFT_H */
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