/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Support for the xscale frame buffer.
*
* Author: Jean-Frederic Clere
* Created: Sep 22, 2003
* Copyright: jfclere@sinix.net
*/
#include <linux/fb.h>
/*
* Supported LCD connections
*
* bits 0 - 3: for LCD panel type:
*
* STN - for passive matrix
* DSTN - for dual scan passive matrix
* TFT - for active matrix
*
* bits 4 - 9 : for bus width
* bits 10-17 : for AC Bias Pin Frequency
* bit 18 : for output enable polarity
* bit 19 : for pixel clock edge
* bit 20 : for output pixel format when base is RGBT16
*/
#define LCD_CONN_TYPE(_x) ((_x) & 0x0f)
#define LCD_CONN_WIDTH(_x) (((_x) >> 4) & 0x1f)
#define LCD_TYPE_MASK 0xf
#define LCD_TYPE_UNKNOWN 0
#define LCD_TYPE_MONO_STN 1
#define LCD_TYPE_MONO_DSTN 2
#define LCD_TYPE_COLOR_STN 3
#define LCD_TYPE_COLOR_DSTN 4
#define LCD_TYPE_COLOR_TFT 5
#define LCD_TYPE_SMART_PANEL 6
#define LCD_TYPE_MAX 7
#define LCD_MONO_STN_4BPP ((4 << 4) | LCD_TYPE_MONO_STN)
#define LCD_MONO_STN_8BPP ((8 << 4) | LCD_TYPE_MONO_STN)
#define LCD_MONO_DSTN_8BPP ((8 << 4) | LCD_TYPE_MONO_DSTN)
#define LCD_COLOR_STN_8BPP ((8 << 4) | LCD_TYPE_COLOR_STN)
#define LCD_COLOR_DSTN_16BPP ((16 << 4) | LCD_TYPE_COLOR_DSTN)
#define LCD_COLOR_TFT_8BPP ((8 << 4) | LCD_TYPE_COLOR_TFT)
#define LCD_COLOR_TFT_16BPP ((16 << 4) | LCD_TYPE_COLOR_TFT)
#define LCD_COLOR_TFT_18BPP ((18 << 4) | LCD_TYPE_COLOR_TFT)
#define LCD_SMART_PANEL_8BPP ((8 << 4) | LCD_TYPE_SMART_PANEL)
#define LCD_SMART_PANEL_16BPP ((16 << 4) | LCD_TYPE_SMART_PANEL)
#define LCD_SMART_PANEL_18BPP ((18 << 4) | LCD_TYPE_SMART_PANEL)
#define LCD_AC_BIAS_FREQ(x) (((x) & 0xff) << 10)
#define LCD_BIAS_ACTIVE_HIGH (0 << 18)
#define LCD_BIAS_ACTIVE_LOW (1 << 18)
#define LCD_PCLK_EDGE_RISE (0 << 19)
#define LCD_PCLK_EDGE_FALL (1 << 19)
#define LCD_ALTERNATE_MAPPING (1 << 20)
/*
* This structure describes the machine which we are running on.
* It is set in linux/arch/arm/mach-pxa/machine_name.c and used in the probe routine
* of linux/drivers/video/pxafb.c
*/
struct pxafb_mode_info {
u_long pixclock;
u_short xres;
u_short yres;
u_char bpp;
u_int cmap_greyscale:1,
depth:8,
transparency:1,
unused:22;
/* Parallel Mode Timing */
u_char hsync_len;
u_char left_margin;
u_char right_margin;
u_char vsync_len;
u_char upper_margin;
u_char lower_margin;
u_char sync;
/* Smart Panel Mode Timing - see PXA27x DM 7.4.15.0.3 for details
* Note:
* 1. all parameters in nanosecond (ns)
* 2. a0cs{rd,wr}_set_hld are controlled by the same register bits
* in pxa27x and pxa3xx, initialize them to the same value or
* the larger one will be used
* 3. same to {rd,wr}_pulse_width
*
* 4. LCD_PCLK_EDGE_{RISE,FALL} controls the L_PCLK_WR polarity
* 5. sync & FB_SYNC_HOR_HIGH_ACT controls the L_LCLK_A0
* 6. sync & FB_SYNC_VERT_HIGH_ACT controls the L_LCLK_RD
*/
unsigned a0csrd_set_hld; /* A0 and CS Setup/Hold Time before/after L_FCLK_RD */
unsigned a0cswr_set_hld; /* A0 and CS Setup/Hold Time before/after L_PCLK_WR */
unsigned wr_pulse_width; /* L_PCLK_WR pulse width */
unsigned rd_pulse_width; /* L_FCLK_RD pulse width */
unsigned cmd_inh_time; /* Command Inhibit time between two writes */
unsigned op_hold_time; /* Output Hold time from L_FCLK_RD negation */
};
struct pxafb_mach_info {
struct pxafb_mode_info *modes;
unsigned int num_modes;
unsigned int lcd_conn;
unsigned long video_mem_size;
u_int fixed_modes:1,
cmap_inverse:1,
cmap_static:1,
acceleration_enabled:1,
unused:28;
/* The following should be defined in LCCR0
* LCCR0_Act or LCCR0_Pas Active or Passive
* LCCR0_Sngl or LCCR0_Dual Single/Dual panel
* LCCR0_Mono or LCCR0_Color Mono/Color
* LCCR0_4PixMono or LCCR0_8PixMono (in mono single mode)
* LCCR0_DMADel(Tcpu) (optional) DMA request delay
*
* The following should not be defined in LCCR0:
* LCCR0_OUM, LCCR0_BM, LCCR0_QDM, LCCR0_DIS, LCCR0_EFM
* LCCR0_IUM, LCCR0_SFM, LCCR0_LDM, LCCR0_ENB
*/
u_int lccr0;
/* The following should be defined in LCCR3
* LCCR3_OutEnH or LCCR3_OutEnL Output enable polarity
* LCCR3_PixRsEdg or LCCR3_PixFlEdg Pixel clock edge type
* LCCR3_Acb(X) AB Bias pin frequency
* LCCR3_DPC (optional) Double Pixel Clock mode (untested)
*
* The following should not be defined in LCCR3
* LCCR3_HSP, LCCR3_VSP, LCCR0_Pcd(x), LCCR3_Bpp
*/
u_int lccr3;
/* The following should be defined in LCCR4
* LCCR4_PAL_FOR_0 or LCCR4_PAL_FOR_1 or LCCR4_PAL_FOR_2
*
* All other bits in LCCR4 should be left alone.
*/
u_int lccr4;
void (*pxafb_backlight_power)(int);
void (*pxafb_lcd_power)(int, struct fb_var_screeninfo *);
void (*smart_update)(struct fb_info *);
};
void pxa_set_fb_info(struct device *, struct pxafb_mach_info *);
unsigned long pxafb_get_hsync_time(struct device *dev);
/* smartpanel related */
#define SMART_CMD_A0 (0x1 << 8)
#define SMART_CMD_READ_STATUS_REG (0x0 << 9)
#define SMART_CMD_READ_FRAME_BUFFER ((0x0 << 9) | SMART_CMD_A0)
#define SMART_CMD_WRITE_COMMAND (0x1 << 9)
#define SMART_CMD_WRITE_DATA ((0x1 << 9) | SMART_CMD_A0)
#define SMART_CMD_WRITE_FRAME ((0x2 << 9) | SMART_CMD_A0)
#define SMART_CMD_WAIT_FOR_VSYNC (0x3 << 9)
#define SMART_CMD_NOOP (0x4 << 9)
#define SMART_CMD_INTERRUPT (0x5 << 9)
#define SMART_CMD(x) (SMART_CMD_WRITE_COMMAND | ((x) & 0xff))
#define SMART_DAT(x) (SMART_CMD_WRITE_DATA | ((x) & 0xff))
/* SMART_DELAY() is introduced for software controlled delay primitive which
* can be inserted between command sequences, unused command 0x6 is used here
* and delay ranges from 0ms ~ 255ms
*/
#define SMART_CMD_DELAY (0x6 << 9)
#define SMART_DELAY(ms) (SMART_CMD_DELAY | ((ms) & 0xff))
#ifdef CONFIG_FB_PXA_SMARTPANEL
extern int pxafb_smart_queue(struct fb_info *info, uint16_t *cmds, int);
extern int pxafb_smart_flush(struct fb_info *info);
#else
static inline int pxafb_smart_queue(struct fb_info *info,
uint16_t *cmds, int n)
{
return 0;
}
static inline int pxafb_smart_flush(struct fb_info *info)
{
return 0;
}
#endif