https://github.com/torvalds/linux
Tip revision: 3d7cb6b04c3f3115719235cc6866b10326de34cd authored by Linus Torvalds on 31 July 2022, 21:03:01 UTC
Linux 5.19
Linux 5.19
Tip revision: 3d7cb6b
pcm990-baseboard.c
// SPDX-License-Identifier: GPL-2.0-only
/*
* arch/arm/mach-pxa/pcm990-baseboard.c
* Support for the Phytec phyCORE-PXA270 Development Platform (PCM-990).
*
* Refer
* http://www.phytec.com/products/rdk/ARM-XScale/phyCORE-XScale-PXA270.html
* for additional hardware info
*
* Author: Juergen Kilb
* Created: April 05, 2005
* Copyright: Phytec Messtechnik GmbH
* e-Mail: armlinux@phytec.de
*
* based on Intel Mainstone Board
*
* Copyright 2007 Juergen Beisert @ Pengutronix (j.beisert@pengutronix.de)
*/
#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/platform_data/i2c-pxa.h>
#include <linux/pwm.h>
#include <linux/pwm_backlight.h>
#include <asm/mach/map.h>
#include "pxa27x.h"
#include <linux/platform_data/asoc-pxa.h>
#include <linux/platform_data/mmc-pxamci.h>
#include <linux/platform_data/usb-ohci-pxa27x.h>
#include "pcm990_baseboard.h"
#include <linux/platform_data/video-pxafb.h>
#include "devices.h"
#include "generic.h"
static unsigned long pcm990_pin_config[] __initdata = {
/* MMC */
GPIO32_MMC_CLK,
GPIO112_MMC_CMD,
GPIO92_MMC_DAT_0,
GPIO109_MMC_DAT_1,
GPIO110_MMC_DAT_2,
GPIO111_MMC_DAT_3,
/* USB */
GPIO88_USBH1_PWR,
GPIO89_USBH1_PEN,
/* PWM0 */
GPIO16_PWM0_OUT,
/* I2C */
GPIO117_I2C_SCL,
GPIO118_I2C_SDA,
/* AC97 */
GPIO28_AC97_BITCLK,
GPIO29_AC97_SDATA_IN_0,
GPIO30_AC97_SDATA_OUT,
GPIO31_AC97_SYNC,
};
static void __iomem *pcm990_cpld_base;
static u8 pcm990_cpld_readb(unsigned int reg)
{
return readb(pcm990_cpld_base + reg);
}
static void pcm990_cpld_writeb(u8 value, unsigned int reg)
{
writeb(value, pcm990_cpld_base + reg);
}
/*
* pcm990_lcd_power - control power supply to the LCD
* @on: 0 = switch off, 1 = switch on
*
* Called by the pxafb driver
*/
#ifndef CONFIG_PCM990_DISPLAY_NONE
static void pcm990_lcd_power(int on, struct fb_var_screeninfo *var)
{
if (on) {
/* enable LCD-Latches
* power on LCD
*/
pcm990_cpld_writeb(PCM990_CTRL_LCDPWR + PCM990_CTRL_LCDON,
PCM990_CTRL_REG3);
} else {
/* disable LCD-Latches
* power off LCD
*/
pcm990_cpld_writeb(0, PCM990_CTRL_REG3);
}
}
#endif
#if defined(CONFIG_PCM990_DISPLAY_SHARP)
static struct pxafb_mode_info fb_info_sharp_lq084v1dg21 = {
.pixclock = 28000,
.xres = 640,
.yres = 480,
.bpp = 16,
.hsync_len = 20,
.left_margin = 103,
.right_margin = 47,
.vsync_len = 6,
.upper_margin = 28,
.lower_margin = 5,
.sync = 0,
.cmap_greyscale = 0,
};
static struct pxafb_mach_info pcm990_fbinfo __initdata = {
.modes = &fb_info_sharp_lq084v1dg21,
.num_modes = 1,
.lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
.pxafb_lcd_power = pcm990_lcd_power,
};
#elif defined(CONFIG_PCM990_DISPLAY_NEC)
struct pxafb_mode_info fb_info_nec_nl6448bc20_18d = {
.pixclock = 39720,
.xres = 640,
.yres = 480,
.bpp = 16,
.hsync_len = 32,
.left_margin = 16,
.right_margin = 48,
.vsync_len = 2,
.upper_margin = 12,
.lower_margin = 17,
.sync = 0,
.cmap_greyscale = 0,
};
static struct pxafb_mach_info pcm990_fbinfo __initdata = {
.modes = &fb_info_nec_nl6448bc20_18d,
.num_modes = 1,
.lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
.pxafb_lcd_power = pcm990_lcd_power,
};
#endif
static struct pwm_lookup pcm990_pwm_lookup[] = {
PWM_LOOKUP("pxa27x-pwm.0", 0, "pwm-backlight.0", NULL, 78770,
PWM_POLARITY_NORMAL),
};
static struct platform_pwm_backlight_data pcm990_backlight_data = {
.max_brightness = 1023,
.dft_brightness = 1023,
};
static struct platform_device pcm990_backlight_device = {
.name = "pwm-backlight",
.dev = {
.parent = &pxa27x_device_pwm0.dev,
.platform_data = &pcm990_backlight_data,
},
};
/*
* The PCM-990 development baseboard uses PCM-027's hardware in the
* following way:
*
* - LCD support is in use
* - GPIO16 is output for back light on/off with PWM
* - GPIO58 ... GPIO73 are outputs for display data
* - GPIO74 is output output for LCDFCLK
* - GPIO75 is output for LCDLCLK
* - GPIO76 is output for LCDPCLK
* - GPIO77 is output for LCDBIAS
* - MMC support is in use
* - GPIO32 is output for MMCCLK
* - GPIO92 is MMDAT0
* - GPIO109 is MMDAT1
* - GPIO110 is MMCS0
* - GPIO111 is MMCS1
* - GPIO112 is MMCMD
* - IDE/CF card is in use
* - GPIO48 is output /POE
* - GPIO49 is output /PWE
* - GPIO50 is output /PIOR
* - GPIO51 is output /PIOW
* - GPIO54 is output /PCE2
* - GPIO55 is output /PREG
* - GPIO56 is input /PWAIT
* - GPIO57 is output /PIOS16
* - GPIO79 is output PSKTSEL
* - GPIO85 is output /PCE1
* - FFUART is in use
* - GPIO34 is input FFRXD
* - GPIO35 is input FFCTS
* - GPIO36 is input FFDCD
* - GPIO37 is input FFDSR
* - GPIO38 is input FFRI
* - GPIO39 is output FFTXD
* - GPIO40 is output FFDTR
* - GPIO41 is output FFRTS
* - BTUART is in use
* - GPIO42 is input BTRXD
* - GPIO43 is output BTTXD
* - GPIO44 is input BTCTS
* - GPIO45 is output BTRTS
* - IRUART is in use
* - GPIO46 is input STDRXD
* - GPIO47 is output STDTXD
* - AC97 is in use*)
* - GPIO28 is input AC97CLK
* - GPIO29 is input AC97DatIn
* - GPIO30 is output AC97DatO
* - GPIO31 is output AC97SYNC
* - GPIO113 is output AC97_RESET
* - SSP is in use
* - GPIO23 is output SSPSCLK
* - GPIO24 is output chip select to Max7301
* - GPIO25 is output SSPTXD
* - GPIO26 is input SSPRXD
* - GPIO27 is input for Max7301 IRQ
* - GPIO53 is input SSPSYSCLK
* - SSP3 is in use
* - GPIO81 is output SSPTXD3
* - GPIO82 is input SSPRXD3
* - GPIO83 is output SSPSFRM
* - GPIO84 is output SSPCLK3
*
* Otherwise claimed GPIOs:
* GPIO1 -> IRQ from user switch
* GPIO9 -> IRQ from power management
* GPIO10 -> IRQ from WML9712 AC97 controller
* GPIO11 -> IRQ from IDE controller
* GPIO12 -> IRQ from CF controller
* GPIO13 -> IRQ from CF controller
* GPIO14 -> GPIO free
* GPIO15 -> /CS1 selects baseboard's Control CPLD (U7, 16 bit wide data path)
* GPIO19 -> GPIO free
* GPIO20 -> /SDCS2
* GPIO21 -> /CS3 PC card socket select
* GPIO33 -> /CS5 network controller select
* GPIO78 -> /CS2 (16 bit wide data path)
* GPIO80 -> /CS4 (16 bit wide data path)
* GPIO86 -> GPIO free
* GPIO87 -> GPIO free
* GPIO90 -> LED0 on CPU module
* GPIO91 -> LED1 on CPI module
* GPIO117 -> SCL
* GPIO118 -> SDA
*/
static unsigned long pcm990_irq_enabled;
static void pcm990_mask_ack_irq(struct irq_data *d)
{
int pcm990_irq = (d->irq - PCM027_IRQ(0));
pcm990_irq_enabled &= ~(1 << pcm990_irq);
pcm990_cpld_writeb(pcm990_irq_enabled, PCM990_CTRL_INTMSKENA);
}
static void pcm990_unmask_irq(struct irq_data *d)
{
int pcm990_irq = (d->irq - PCM027_IRQ(0));
u8 val;
/* the irq can be acknowledged only if deasserted, so it's done here */
pcm990_irq_enabled |= (1 << pcm990_irq);
val = pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
val |= 1 << pcm990_irq;
pcm990_cpld_writeb(val, PCM990_CTRL_INTSETCLR);
pcm990_cpld_writeb(pcm990_irq_enabled, PCM990_CTRL_INTMSKENA);
}
static struct irq_chip pcm990_irq_chip = {
.irq_mask_ack = pcm990_mask_ack_irq,
.irq_unmask = pcm990_unmask_irq,
};
static void pcm990_irq_handler(struct irq_desc *desc)
{
unsigned int irq;
unsigned long pending;
pending = ~pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
pending &= pcm990_irq_enabled;
do {
/* clear our parent IRQ */
desc->irq_data.chip->irq_ack(&desc->irq_data);
if (likely(pending)) {
irq = PCM027_IRQ(0) + __ffs(pending);
generic_handle_irq(irq);
}
pending = ~pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
pending &= pcm990_irq_enabled;
} while (pending);
}
static void __init pcm990_init_irq(void)
{
int irq;
/* setup extra PCM990 irqs */
for (irq = PCM027_IRQ(0); irq <= PCM027_IRQ(3); irq++) {
irq_set_chip_and_handler(irq, &pcm990_irq_chip,
handle_level_irq);
irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
}
/* disable all Interrupts */
pcm990_cpld_writeb(0x0, PCM990_CTRL_INTMSKENA);
pcm990_cpld_writeb(0xff, PCM990_CTRL_INTSETCLR);
irq_set_chained_handler(PCM990_CTRL_INT_IRQ, pcm990_irq_handler);
irq_set_irq_type(PCM990_CTRL_INT_IRQ, PCM990_CTRL_INT_IRQ_EDGE);
}
static int pcm990_mci_init(struct device *dev, irq_handler_t mci_detect_int,
void *data)
{
int err;
err = request_irq(PCM027_MMCDET_IRQ, mci_detect_int, 0,
"MMC card detect", data);
if (err)
printk(KERN_ERR "pcm990_mci_init: MMC/SD: can't request MMC "
"card detect IRQ\n");
return err;
}
static int pcm990_mci_setpower(struct device *dev, unsigned int vdd)
{
struct pxamci_platform_data *p_d = dev->platform_data;
u8 val;
val = pcm990_cpld_readb(PCM990_CTRL_REG5);
if ((1 << vdd) & p_d->ocr_mask)
val |= PCM990_CTRL_MMC2PWR;
else
val &= ~PCM990_CTRL_MMC2PWR;
pcm990_cpld_writeb(PCM990_CTRL_MMC2PWR, PCM990_CTRL_REG5);
return 0;
}
static void pcm990_mci_exit(struct device *dev, void *data)
{
free_irq(PCM027_MMCDET_IRQ, data);
}
#define MSECS_PER_JIFFY (1000/HZ)
static struct pxamci_platform_data pcm990_mci_platform_data = {
.detect_delay_ms = 250,
.ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34,
.init = pcm990_mci_init,
.setpower = pcm990_mci_setpower,
.exit = pcm990_mci_exit,
};
static struct pxaohci_platform_data pcm990_ohci_platform_data = {
.port_mode = PMM_PERPORT_MODE,
.flags = ENABLE_PORT1 | POWER_CONTROL_LOW | POWER_SENSE_LOW,
.power_on_delay = 10,
};
/*
* system init for baseboard usage. Will be called by pcm027 init.
*
* Add platform devices present on this baseboard and init
* them from CPU side as far as required to use them later on
*/
void __init pcm990_baseboard_init(void)
{
pxa2xx_mfp_config(ARRAY_AND_SIZE(pcm990_pin_config));
pcm990_cpld_base = ioremap(PCM990_CTRL_PHYS, PCM990_CTRL_SIZE);
if (!pcm990_cpld_base) {
pr_err("pcm990: failed to ioremap cpld\n");
return;
}
/* register CPLD's IRQ controller */
pcm990_init_irq();
#ifndef CONFIG_PCM990_DISPLAY_NONE
pxa_set_fb_info(NULL, &pcm990_fbinfo);
#endif
pwm_add_table(pcm990_pwm_lookup, ARRAY_SIZE(pcm990_pwm_lookup));
platform_device_register(&pcm990_backlight_device);
/* MMC */
pxa_set_mci_info(&pcm990_mci_platform_data);
/* USB host */
pxa_set_ohci_info(&pcm990_ohci_platform_data);
pxa_set_i2c_info(NULL);
pxa_set_ac97_info(NULL);
printk(KERN_INFO "PCM-990 Evaluation baseboard initialized\n");
}