mirror of https://gitee.com/openkylin/linux.git
409 lines
10 KiB
C
409 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* arch/arm/mach-pxa/pcm990-baseboard.c
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* Support for the Phytec phyCORE-PXA270 Development Platform (PCM-990).
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*
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* Refer
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* http://www.phytec.com/products/rdk/ARM-XScale/phyCORE-XScale-PXA270.html
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* for additional hardware info
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*
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* Author: Juergen Kilb
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* Created: April 05, 2005
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* Copyright: Phytec Messtechnik GmbH
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* e-Mail: armlinux@phytec.de
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*
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* based on Intel Mainstone Board
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*
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* Copyright 2007 Juergen Beisert @ Pengutronix (j.beisert@pengutronix.de)
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*/
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#include <linux/gpio.h>
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#include <linux/irq.h>
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#include <linux/platform_device.h>
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#include <linux/i2c.h>
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#include <linux/platform_data/i2c-pxa.h>
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#include <linux/pwm.h>
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#include <linux/pwm_backlight.h>
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#include <asm/mach/map.h>
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#include "pxa27x.h"
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#include <mach/audio.h>
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#include <linux/platform_data/mmc-pxamci.h>
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#include <linux/platform_data/usb-ohci-pxa27x.h>
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#include "pcm990_baseboard.h"
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#include <linux/platform_data/video-pxafb.h>
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#include "devices.h"
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#include "generic.h"
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static unsigned long pcm990_pin_config[] __initdata = {
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/* MMC */
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GPIO32_MMC_CLK,
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GPIO112_MMC_CMD,
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GPIO92_MMC_DAT_0,
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GPIO109_MMC_DAT_1,
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GPIO110_MMC_DAT_2,
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GPIO111_MMC_DAT_3,
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/* USB */
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GPIO88_USBH1_PWR,
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GPIO89_USBH1_PEN,
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/* PWM0 */
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GPIO16_PWM0_OUT,
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/* I2C */
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GPIO117_I2C_SCL,
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GPIO118_I2C_SDA,
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/* AC97 */
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GPIO28_AC97_BITCLK,
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GPIO29_AC97_SDATA_IN_0,
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GPIO30_AC97_SDATA_OUT,
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GPIO31_AC97_SYNC,
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};
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static void __iomem *pcm990_cpld_base;
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static u8 pcm990_cpld_readb(unsigned int reg)
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{
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return readb(pcm990_cpld_base + reg);
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}
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static void pcm990_cpld_writeb(u8 value, unsigned int reg)
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{
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writeb(value, pcm990_cpld_base + reg);
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}
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/*
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* pcm990_lcd_power - control power supply to the LCD
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* @on: 0 = switch off, 1 = switch on
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*
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* Called by the pxafb driver
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*/
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#ifndef CONFIG_PCM990_DISPLAY_NONE
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static void pcm990_lcd_power(int on, struct fb_var_screeninfo *var)
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{
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if (on) {
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/* enable LCD-Latches
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* power on LCD
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*/
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pcm990_cpld_writeb(PCM990_CTRL_LCDPWR + PCM990_CTRL_LCDON,
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PCM990_CTRL_REG3);
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} else {
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/* disable LCD-Latches
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* power off LCD
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*/
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pcm990_cpld_writeb(0, PCM990_CTRL_REG3);
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}
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}
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#endif
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#if defined(CONFIG_PCM990_DISPLAY_SHARP)
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static struct pxafb_mode_info fb_info_sharp_lq084v1dg21 = {
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.pixclock = 28000,
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.xres = 640,
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.yres = 480,
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.bpp = 16,
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.hsync_len = 20,
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.left_margin = 103,
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.right_margin = 47,
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.vsync_len = 6,
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.upper_margin = 28,
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.lower_margin = 5,
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.sync = 0,
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.cmap_greyscale = 0,
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};
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static struct pxafb_mach_info pcm990_fbinfo __initdata = {
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.modes = &fb_info_sharp_lq084v1dg21,
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.num_modes = 1,
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.lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
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.pxafb_lcd_power = pcm990_lcd_power,
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};
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#elif defined(CONFIG_PCM990_DISPLAY_NEC)
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struct pxafb_mode_info fb_info_nec_nl6448bc20_18d = {
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.pixclock = 39720,
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.xres = 640,
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.yres = 480,
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.bpp = 16,
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.hsync_len = 32,
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.left_margin = 16,
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.right_margin = 48,
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.vsync_len = 2,
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.upper_margin = 12,
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.lower_margin = 17,
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.sync = 0,
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.cmap_greyscale = 0,
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};
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static struct pxafb_mach_info pcm990_fbinfo __initdata = {
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.modes = &fb_info_nec_nl6448bc20_18d,
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.num_modes = 1,
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.lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
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.pxafb_lcd_power = pcm990_lcd_power,
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};
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#endif
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static struct pwm_lookup pcm990_pwm_lookup[] = {
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PWM_LOOKUP("pxa27x-pwm.0", 0, "pwm-backlight.0", NULL, 78770,
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PWM_POLARITY_NORMAL),
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};
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static struct platform_pwm_backlight_data pcm990_backlight_data = {
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.max_brightness = 1023,
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.dft_brightness = 1023,
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};
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static struct platform_device pcm990_backlight_device = {
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.name = "pwm-backlight",
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.dev = {
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.parent = &pxa27x_device_pwm0.dev,
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.platform_data = &pcm990_backlight_data,
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},
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};
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/*
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* The PCM-990 development baseboard uses PCM-027's hardware in the
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* following way:
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*
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* - LCD support is in use
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* - GPIO16 is output for back light on/off with PWM
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* - GPIO58 ... GPIO73 are outputs for display data
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* - GPIO74 is output output for LCDFCLK
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* - GPIO75 is output for LCDLCLK
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* - GPIO76 is output for LCDPCLK
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* - GPIO77 is output for LCDBIAS
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* - MMC support is in use
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* - GPIO32 is output for MMCCLK
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* - GPIO92 is MMDAT0
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* - GPIO109 is MMDAT1
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* - GPIO110 is MMCS0
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* - GPIO111 is MMCS1
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* - GPIO112 is MMCMD
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* - IDE/CF card is in use
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* - GPIO48 is output /POE
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* - GPIO49 is output /PWE
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* - GPIO50 is output /PIOR
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* - GPIO51 is output /PIOW
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* - GPIO54 is output /PCE2
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* - GPIO55 is output /PREG
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* - GPIO56 is input /PWAIT
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* - GPIO57 is output /PIOS16
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* - GPIO79 is output PSKTSEL
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* - GPIO85 is output /PCE1
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* - FFUART is in use
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* - GPIO34 is input FFRXD
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* - GPIO35 is input FFCTS
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* - GPIO36 is input FFDCD
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* - GPIO37 is input FFDSR
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* - GPIO38 is input FFRI
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* - GPIO39 is output FFTXD
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* - GPIO40 is output FFDTR
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* - GPIO41 is output FFRTS
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* - BTUART is in use
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* - GPIO42 is input BTRXD
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* - GPIO43 is output BTTXD
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* - GPIO44 is input BTCTS
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* - GPIO45 is output BTRTS
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* - IRUART is in use
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* - GPIO46 is input STDRXD
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* - GPIO47 is output STDTXD
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* - AC97 is in use*)
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* - GPIO28 is input AC97CLK
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* - GPIO29 is input AC97DatIn
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* - GPIO30 is output AC97DatO
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* - GPIO31 is output AC97SYNC
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* - GPIO113 is output AC97_RESET
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* - SSP is in use
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* - GPIO23 is output SSPSCLK
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* - GPIO24 is output chip select to Max7301
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* - GPIO25 is output SSPTXD
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* - GPIO26 is input SSPRXD
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* - GPIO27 is input for Max7301 IRQ
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* - GPIO53 is input SSPSYSCLK
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* - SSP3 is in use
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* - GPIO81 is output SSPTXD3
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* - GPIO82 is input SSPRXD3
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* - GPIO83 is output SSPSFRM
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* - GPIO84 is output SSPCLK3
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*
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* Otherwise claimed GPIOs:
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* GPIO1 -> IRQ from user switch
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* GPIO9 -> IRQ from power management
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* GPIO10 -> IRQ from WML9712 AC97 controller
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* GPIO11 -> IRQ from IDE controller
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* GPIO12 -> IRQ from CF controller
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* GPIO13 -> IRQ from CF controller
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* GPIO14 -> GPIO free
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* GPIO15 -> /CS1 selects baseboard's Control CPLD (U7, 16 bit wide data path)
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* GPIO19 -> GPIO free
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* GPIO20 -> /SDCS2
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* GPIO21 -> /CS3 PC card socket select
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* GPIO33 -> /CS5 network controller select
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* GPIO78 -> /CS2 (16 bit wide data path)
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* GPIO80 -> /CS4 (16 bit wide data path)
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* GPIO86 -> GPIO free
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* GPIO87 -> GPIO free
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* GPIO90 -> LED0 on CPU module
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* GPIO91 -> LED1 on CPI module
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* GPIO117 -> SCL
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* GPIO118 -> SDA
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*/
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static unsigned long pcm990_irq_enabled;
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static void pcm990_mask_ack_irq(struct irq_data *d)
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{
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int pcm990_irq = (d->irq - PCM027_IRQ(0));
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pcm990_irq_enabled &= ~(1 << pcm990_irq);
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pcm990_cpld_writeb(pcm990_irq_enabled, PCM990_CTRL_INTMSKENA);
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}
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static void pcm990_unmask_irq(struct irq_data *d)
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{
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int pcm990_irq = (d->irq - PCM027_IRQ(0));
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u8 val;
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/* the irq can be acknowledged only if deasserted, so it's done here */
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pcm990_irq_enabled |= (1 << pcm990_irq);
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val = pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
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val |= 1 << pcm990_irq;
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pcm990_cpld_writeb(val, PCM990_CTRL_INTSETCLR);
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pcm990_cpld_writeb(pcm990_irq_enabled, PCM990_CTRL_INTMSKENA);
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}
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static struct irq_chip pcm990_irq_chip = {
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.irq_mask_ack = pcm990_mask_ack_irq,
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.irq_unmask = pcm990_unmask_irq,
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};
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static void pcm990_irq_handler(struct irq_desc *desc)
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{
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unsigned int irq;
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unsigned long pending;
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pending = ~pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
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pending &= pcm990_irq_enabled;
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do {
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/* clear our parent IRQ */
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desc->irq_data.chip->irq_ack(&desc->irq_data);
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if (likely(pending)) {
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irq = PCM027_IRQ(0) + __ffs(pending);
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generic_handle_irq(irq);
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}
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pending = ~pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
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pending &= pcm990_irq_enabled;
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} while (pending);
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}
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static void __init pcm990_init_irq(void)
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{
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int irq;
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/* setup extra PCM990 irqs */
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for (irq = PCM027_IRQ(0); irq <= PCM027_IRQ(3); irq++) {
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irq_set_chip_and_handler(irq, &pcm990_irq_chip,
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handle_level_irq);
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irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
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}
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/* disable all Interrupts */
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pcm990_cpld_writeb(0x0, PCM990_CTRL_INTMSKENA);
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pcm990_cpld_writeb(0xff, PCM990_CTRL_INTSETCLR);
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irq_set_chained_handler(PCM990_CTRL_INT_IRQ, pcm990_irq_handler);
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irq_set_irq_type(PCM990_CTRL_INT_IRQ, PCM990_CTRL_INT_IRQ_EDGE);
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}
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static int pcm990_mci_init(struct device *dev, irq_handler_t mci_detect_int,
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void *data)
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{
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int err;
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err = request_irq(PCM027_MMCDET_IRQ, mci_detect_int, 0,
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"MMC card detect", data);
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if (err)
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printk(KERN_ERR "pcm990_mci_init: MMC/SD: can't request MMC "
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"card detect IRQ\n");
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return err;
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}
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static int pcm990_mci_setpower(struct device *dev, unsigned int vdd)
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{
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struct pxamci_platform_data *p_d = dev->platform_data;
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u8 val;
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val = pcm990_cpld_readb(PCM990_CTRL_REG5);
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if ((1 << vdd) & p_d->ocr_mask)
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val |= PCM990_CTRL_MMC2PWR;
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else
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val &= ~PCM990_CTRL_MMC2PWR;
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pcm990_cpld_writeb(PCM990_CTRL_MMC2PWR, PCM990_CTRL_REG5);
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return 0;
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}
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static void pcm990_mci_exit(struct device *dev, void *data)
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{
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free_irq(PCM027_MMCDET_IRQ, data);
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}
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#define MSECS_PER_JIFFY (1000/HZ)
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static struct pxamci_platform_data pcm990_mci_platform_data = {
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.detect_delay_ms = 250,
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.ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34,
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.init = pcm990_mci_init,
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.setpower = pcm990_mci_setpower,
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.exit = pcm990_mci_exit,
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};
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static struct pxaohci_platform_data pcm990_ohci_platform_data = {
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.port_mode = PMM_PERPORT_MODE,
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.flags = ENABLE_PORT1 | POWER_CONTROL_LOW | POWER_SENSE_LOW,
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.power_on_delay = 10,
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};
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/*
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* system init for baseboard usage. Will be called by pcm027 init.
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*
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* Add platform devices present on this baseboard and init
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* them from CPU side as far as required to use them later on
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*/
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void __init pcm990_baseboard_init(void)
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{
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pxa2xx_mfp_config(ARRAY_AND_SIZE(pcm990_pin_config));
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pcm990_cpld_base = ioremap(PCM990_CTRL_PHYS, PCM990_CTRL_SIZE);
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if (!pcm990_cpld_base) {
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pr_err("pcm990: failed to ioremap cpld\n");
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return;
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}
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/* register CPLD's IRQ controller */
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pcm990_init_irq();
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#ifndef CONFIG_PCM990_DISPLAY_NONE
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pxa_set_fb_info(NULL, &pcm990_fbinfo);
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#endif
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pwm_add_table(pcm990_pwm_lookup, ARRAY_SIZE(pcm990_pwm_lookup));
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platform_device_register(&pcm990_backlight_device);
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/* MMC */
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pxa_set_mci_info(&pcm990_mci_platform_data);
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/* USB host */
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pxa_set_ohci_info(&pcm990_ohci_platform_data);
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pxa_set_i2c_info(NULL);
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pxa_set_ac97_info(NULL);
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printk(KERN_INFO "PCM-990 Evaluation baseboard initialized\n");
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}
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