arch/arm/mach-pxa/pcm990-baseboard.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  arch/arm/mach-pxa/pcm990-baseboard.c
   4  *  Support for the Phytec phyCORE-PXA270 Development Platform (PCM-990).
   5  *
   6  *  Refer
   7  *   http://www.phytec.com/products/rdk/ARM-XScale/phyCORE-XScale-PXA270.html
   8  *  for additional hardware info
   9  *
  10  *  Author:     Juergen Kilb
  11  *  Created:    April 05, 2005
  12  *  Copyright:  Phytec Messtechnik GmbH
  13  *  e-Mail:     armlinux@phytec.de
  14  *
  15  *  based on Intel Mainstone Board
  16  *
  17  *  Copyright 2007 Juergen Beisert @ Pengutronix (j.beisert@pengutronix.de)
  18  */
  19 #include <linux/gpio.h>
  20 #include <linux/irq.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/i2c.h>
  23 #include <linux/platform_data/i2c-pxa.h>
  24 #include <linux/pwm.h>
  25 #include <linux/pwm_backlight.h>
  26
  27 #include <asm/mach/map.h>
  28 #include "pxa27x.h"
  29 #include <mach/audio.h>
  30 #include <linux/platform_data/mmc-pxamci.h>
  31 #include <linux/platform_data/usb-ohci-pxa27x.h>
  32 #include "pcm990_baseboard.h"
  33 #include <linux/platform_data/video-pxafb.h>
  34
  35 #include "devices.h"
  36 #include "generic.h"
  37
  38 static unsigned long pcm990_pin_config[] __initdata = {
  39         /* MMC */
  40         GPIO32_MMC_CLK,
  41         GPIO112_MMC_CMD,
  42         GPIO92_MMC_DAT_0,
  43         GPIO109_MMC_DAT_1,
  44         GPIO110_MMC_DAT_2,
  45         GPIO111_MMC_DAT_3,
  46         /* USB */
  47         GPIO88_USBH1_PWR,
  48         GPIO89_USBH1_PEN,
  49         /* PWM0 */
  50         GPIO16_PWM0_OUT,
  51
  52         /* I2C */
  53         GPIO117_I2C_SCL,
  54         GPIO118_I2C_SDA,
  55
  56         /* AC97 */
  57         GPIO28_AC97_BITCLK,
  58         GPIO29_AC97_SDATA_IN_0,
  59         GPIO30_AC97_SDATA_OUT,
  60         GPIO31_AC97_SYNC,
  61 };
  62
  63 static void __iomem *pcm990_cpld_base;
  64
  65 static u8 pcm990_cpld_readb(unsigned int reg)
  66 {
  67         return readb(pcm990_cpld_base + reg);
  68 }
  69
  70 static void pcm990_cpld_writeb(u8 value, unsigned int reg)
  71 {
  72         writeb(value, pcm990_cpld_base + reg);
  73 }
  74
  75 /*
  76  * pcm990_lcd_power - control power supply to the LCD
  77  * @on: 0 = switch off, 1 = switch on
  78  *
  79  * Called by the pxafb driver
  80  */
  81 #ifndef CONFIG_PCM990_DISPLAY_NONE
  82 static void pcm990_lcd_power(int on, struct fb_var_screeninfo *var)
  83 {
  84         if (on) {
  85                 /* enable LCD-Latches
  86                  * power on LCD
  87                  */
  88                 pcm990_cpld_writeb(PCM990_CTRL_LCDPWR + PCM990_CTRL_LCDON,
  89                                 PCM990_CTRL_REG3);
  90         } else {
  91                 /* disable LCD-Latches
  92                  * power off LCD
  93                  */
  94                 pcm990_cpld_writeb(0, PCM990_CTRL_REG3);
  95         }
  96 }
  97 #endif
  98
  99 #if defined(CONFIG_PCM990_DISPLAY_SHARP)
 100 static struct pxafb_mode_info fb_info_sharp_lq084v1dg21 = {
 101         .pixclock               = 28000,
 102         .xres                   = 640,
 103         .yres                   = 480,
 104         .bpp                    = 16,
 105         .hsync_len              = 20,
 106         .left_margin            = 103,
 107         .right_margin           = 47,
 108         .vsync_len              = 6,
 109         .upper_margin           = 28,
 110         .lower_margin           = 5,
 111         .sync                   = 0,
 112         .cmap_greyscale         = 0,
 113 };
 114
 115 static struct pxafb_mach_info pcm990_fbinfo __initdata = {
 116         .modes                  = &fb_info_sharp_lq084v1dg21,
 117         .num_modes              = 1,
 118         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 119         .pxafb_lcd_power        = pcm990_lcd_power,
 120 };
 121 #elif defined(CONFIG_PCM990_DISPLAY_NEC)
 122 struct pxafb_mode_info fb_info_nec_nl6448bc20_18d = {
 123         .pixclock               = 39720,
 124         .xres                   = 640,
 125         .yres                   = 480,
 126         .bpp                    = 16,
 127         .hsync_len              = 32,
 128         .left_margin            = 16,
 129         .right_margin           = 48,
 130         .vsync_len              = 2,
 131         .upper_margin           = 12,
 132         .lower_margin           = 17,
 133         .sync                   = 0,
 134         .cmap_greyscale         = 0,
 135 };
 136
 137 static struct pxafb_mach_info pcm990_fbinfo __initdata = {
 138         .modes                  = &fb_info_nec_nl6448bc20_18d,
 139         .num_modes              = 1,
 140         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 141         .pxafb_lcd_power        = pcm990_lcd_power,
 142 };
 143 #endif
 144
 145 static struct pwm_lookup pcm990_pwm_lookup[] = {
 146         PWM_LOOKUP("pxa27x-pwm.0", 0, "pwm-backlight.0", NULL, 78770,
 147                    PWM_POLARITY_NORMAL),
 148 };
 149
 150 static struct platform_pwm_backlight_data pcm990_backlight_data = {
 151         .max_brightness = 1023,
 152         .dft_brightness = 1023,
 153 };
 154
 155 static struct platform_device pcm990_backlight_device = {
 156         .name           = "pwm-backlight",
 157         .dev            = {
 158                 .parent = &pxa27x_device_pwm0.dev,
 159                 .platform_data = &pcm990_backlight_data,
 160         },
 161 };
 162
 163 /*
 164  * The PCM-990 development baseboard uses PCM-027's hardware in the
 165  * following way:
 166  *
 167  * - LCD support is in use
 168  *  - GPIO16 is output for back light on/off with PWM
 169  *  - GPIO58 ... GPIO73 are outputs for display data
 170  *  - GPIO74 is output output for LCDFCLK
 171  *  - GPIO75 is output for LCDLCLK
 172  *  - GPIO76 is output for LCDPCLK
 173  *  - GPIO77 is output for LCDBIAS
 174  * - MMC support is in use
 175  *  - GPIO32 is output for MMCCLK
 176  *  - GPIO92 is MMDAT0
 177  *  - GPIO109 is MMDAT1
 178  *  - GPIO110 is MMCS0
 179  *  - GPIO111 is MMCS1
 180  *  - GPIO112 is MMCMD
 181  * - IDE/CF card is in use
 182  *  - GPIO48 is output /POE
 183  *  - GPIO49 is output /PWE
 184  *  - GPIO50 is output /PIOR
 185  *  - GPIO51 is output /PIOW
 186  *  - GPIO54 is output /PCE2
 187  *  - GPIO55 is output /PREG
 188  *  - GPIO56 is input /PWAIT
 189  *  - GPIO57 is output /PIOS16
 190  *  - GPIO79 is output PSKTSEL
 191  *  - GPIO85 is output /PCE1
 192  * - FFUART is in use
 193  *  - GPIO34 is input FFRXD
 194  *  - GPIO35 is input FFCTS
 195  *  - GPIO36 is input FFDCD
 196  *  - GPIO37 is input FFDSR
 197  *  - GPIO38 is input FFRI
 198  *  - GPIO39 is output FFTXD
 199  *  - GPIO40 is output FFDTR
 200  *  - GPIO41 is output FFRTS
 201  * - BTUART is in use
 202  *  - GPIO42 is input BTRXD
 203  *  - GPIO43 is output BTTXD
 204  *  - GPIO44 is input BTCTS
 205  *  - GPIO45 is output BTRTS
 206  * - IRUART is in use
 207  *  - GPIO46 is input STDRXD
 208  *  - GPIO47 is output STDTXD
 209  * - AC97 is in use*)
 210  *  - GPIO28 is input AC97CLK
 211  *  - GPIO29 is input AC97DatIn
 212  *  - GPIO30 is output AC97DatO
 213  *  - GPIO31 is output AC97SYNC
 214  *  - GPIO113 is output AC97_RESET
 215  * - SSP is in use
 216  *  - GPIO23 is output SSPSCLK
 217  *  - GPIO24 is output chip select to Max7301
 218  *  - GPIO25 is output SSPTXD
 219  *  - GPIO26 is input SSPRXD
 220  *  - GPIO27 is input for Max7301 IRQ
 221  *  - GPIO53 is input SSPSYSCLK
 222  * - SSP3 is in use
 223  *  - GPIO81 is output SSPTXD3
 224  *  - GPIO82 is input SSPRXD3
 225  *  - GPIO83 is output SSPSFRM
 226  *  - GPIO84 is output SSPCLK3
 227  *
 228  * Otherwise claimed GPIOs:
 229  * GPIO1 -> IRQ from user switch
 230  * GPIO9 -> IRQ from power management
 231  * GPIO10 -> IRQ from WML9712 AC97 controller
 232  * GPIO11 -> IRQ from IDE controller
 233  * GPIO12 -> IRQ from CF controller
 234  * GPIO13 -> IRQ from CF controller
 235  * GPIO14 -> GPIO free
 236  * GPIO15 -> /CS1 selects baseboard's Control CPLD (U7, 16 bit wide data path)
 237  * GPIO19 -> GPIO free
 238  * GPIO20 -> /SDCS2
 239  * GPIO21 -> /CS3 PC card socket select
 240  * GPIO33 -> /CS5  network controller select
 241  * GPIO78 -> /CS2  (16 bit wide data path)
 242  * GPIO80 -> /CS4  (16 bit wide data path)
 243  * GPIO86 -> GPIO free
 244  * GPIO87 -> GPIO free
 245  * GPIO90 -> LED0 on CPU module
 246  * GPIO91 -> LED1 on CPI module
 247  * GPIO117 -> SCL
 248  * GPIO118 -> SDA
 249  */
 250
 251 static unsigned long pcm990_irq_enabled;
 252
 253 static void pcm990_mask_ack_irq(struct irq_data *d)
 254 {
 255         int pcm990_irq = (d->irq - PCM027_IRQ(0));
 256
 257         pcm990_irq_enabled &= ~(1 << pcm990_irq);
 258
 259         pcm990_cpld_writeb(pcm990_irq_enabled, PCM990_CTRL_INTMSKENA);
 260 }
 261
 262 static void pcm990_unmask_irq(struct irq_data *d)
 263 {
 264         int pcm990_irq = (d->irq - PCM027_IRQ(0));
 265         u8 val;
 266
 267         /* the irq can be acknowledged only if deasserted, so it's done here */
 268
 269         pcm990_irq_enabled |= (1 << pcm990_irq);
 270
 271         val = pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
 272         val |= 1 << pcm990_irq;
 273         pcm990_cpld_writeb(val, PCM990_CTRL_INTSETCLR);
 274
 275         pcm990_cpld_writeb(pcm990_irq_enabled, PCM990_CTRL_INTMSKENA);
 276 }
 277
 278 static struct irq_chip pcm990_irq_chip = {
 279         .irq_mask_ack   = pcm990_mask_ack_irq,
 280         .irq_unmask     = pcm990_unmask_irq,
 281 };
 282
 283 static void pcm990_irq_handler(struct irq_desc *desc)
 284 {
 285         unsigned int irq;
 286         unsigned long pending;
 287
 288         pending = ~pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
 289         pending &= pcm990_irq_enabled;
 290
 291         do {
 292                 /* clear our parent IRQ */
 293                 desc->irq_data.chip->irq_ack(&desc->irq_data);
 294                 if (likely(pending)) {
 295                         irq = PCM027_IRQ(0) + __ffs(pending);
 296                         generic_handle_irq(irq);
 297                 }
 298                 pending = ~pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
 299                 pending &= pcm990_irq_enabled;
 300         } while (pending);
 301 }
 302
 303 static void __init pcm990_init_irq(void)
 304 {
 305         int irq;
 306
 307         /* setup extra PCM990 irqs */
 308         for (irq = PCM027_IRQ(0); irq <= PCM027_IRQ(3); irq++) {
 309                 irq_set_chip_and_handler(irq, &pcm990_irq_chip,
 310                                          handle_level_irq);
 311                 irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
 312         }
 313
 314         /* disable all Interrupts */
 315         pcm990_cpld_writeb(0x0, PCM990_CTRL_INTMSKENA);
 316         pcm990_cpld_writeb(0xff, PCM990_CTRL_INTSETCLR);
 317
 318         irq_set_chained_handler(PCM990_CTRL_INT_IRQ, pcm990_irq_handler);
 319         irq_set_irq_type(PCM990_CTRL_INT_IRQ, PCM990_CTRL_INT_IRQ_EDGE);
 320 }
 321
 322 static int pcm990_mci_init(struct device *dev, irq_handler_t mci_detect_int,
 323                         void *data)
 324 {
 325         int err;
 326
 327         err = request_irq(PCM027_MMCDET_IRQ, mci_detect_int, 0,
 328                              "MMC card detect", data);
 329         if (err)
 330                 printk(KERN_ERR "pcm990_mci_init: MMC/SD: can't request MMC "
 331                                 "card detect IRQ\n");
 332
 333         return err;
 334 }
 335
 336 static int pcm990_mci_setpower(struct device *dev, unsigned int vdd)
 337 {
 338         struct pxamci_platform_data *p_d = dev->platform_data;
 339         u8 val;
 340
 341         val = pcm990_cpld_readb(PCM990_CTRL_REG5);
 342
 343         if ((1 << vdd) & p_d->ocr_mask)
 344                 val |= PCM990_CTRL_MMC2PWR;
 345         else
 346                 val &= ~PCM990_CTRL_MMC2PWR;
 347
 348         pcm990_cpld_writeb(PCM990_CTRL_MMC2PWR, PCM990_CTRL_REG5);
 349         return 0;
 350 }
 351
 352 static void pcm990_mci_exit(struct device *dev, void *data)
 353 {
 354         free_irq(PCM027_MMCDET_IRQ, data);
 355 }
 356
 357 #define MSECS_PER_JIFFY (1000/HZ)
 358
 359 static struct pxamci_platform_data pcm990_mci_platform_data = {
 360         .detect_delay_ms        = 250,
 361         .ocr_mask               = MMC_VDD_32_33 | MMC_VDD_33_34,
 362         .init                   = pcm990_mci_init,
 363         .setpower               = pcm990_mci_setpower,
 364         .exit                   = pcm990_mci_exit,
 365 };
 366
 367 static struct pxaohci_platform_data pcm990_ohci_platform_data = {
 368         .port_mode      = PMM_PERPORT_MODE,
 369         .flags          = ENABLE_PORT1 | POWER_CONTROL_LOW | POWER_SENSE_LOW,
 370         .power_on_delay = 10,
 371 };
 372
 373 /*
 374  * system init for baseboard usage. Will be called by pcm027 init.
 375  *
 376  * Add platform devices present on this baseboard and init
 377  * them from CPU side as far as required to use them later on
 378  */
 379 void __init pcm990_baseboard_init(void)
 380 {
 381         pxa2xx_mfp_config(ARRAY_AND_SIZE(pcm990_pin_config));
 382
 383         pcm990_cpld_base = ioremap(PCM990_CTRL_PHYS, PCM990_CTRL_SIZE);
 384         if (!pcm990_cpld_base) {
 385                 pr_err("pcm990: failed to ioremap cpld\n");
 386                 return;
 387         }
 388
 389         /* register CPLD's IRQ controller */
 390         pcm990_init_irq();
 391
 392 #ifndef CONFIG_PCM990_DISPLAY_NONE
 393         pxa_set_fb_info(NULL, &pcm990_fbinfo);
 394 #endif
 395         pwm_add_table(pcm990_pwm_lookup, ARRAY_SIZE(pcm990_pwm_lookup));
 396         platform_device_register(&pcm990_backlight_device);
 397
 398         /* MMC */
 399         pxa_set_mci_info(&pcm990_mci_platform_data);
 400
 401         /* USB host */
 402         pxa_set_ohci_info(&pcm990_ohci_platform_data);
 403
 404         pxa_set_i2c_info(NULL);
 405         pxa_set_ac97_info(NULL);
 406
 407         printk(KERN_INFO "PCM-990 Evaluation baseboard initialized\n");
 408 }