diff options
Diffstat (limited to 'arch/arm/mach-pxa/pcm990-baseboard.c')
| -rw-r--r-- | arch/arm/mach-pxa/pcm990-baseboard.c | 408 |
1 files changed, 408 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/pcm990-baseboard.c b/arch/arm/mach-pxa/pcm990-baseboard.c new file mode 100644 index 000000000..8dfcc366d --- /dev/null +++ b/arch/arm/mach-pxa/pcm990-baseboard.c @@ -0,0 +1,408 @@ +// 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 <mach/audio.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"); +} |