pcm990-baseboard.c (10320B)
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 <linux/platform_data/asoc-pxa.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 38static 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 63static void __iomem *pcm990_cpld_base; 64 65static u8 pcm990_cpld_readb(unsigned int reg) 66{ 67 return readb(pcm990_cpld_base + reg); 68} 69 70static 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 82static 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) 100static 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 115static 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) 122struct 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 137static 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 145static struct pwm_lookup pcm990_pwm_lookup[] = { 146 PWM_LOOKUP("pxa27x-pwm.0", 0, "pwm-backlight.0", NULL, 78770, 147 PWM_POLARITY_NORMAL), 148}; 149 150static struct platform_pwm_backlight_data pcm990_backlight_data = { 151 .max_brightness = 1023, 152 .dft_brightness = 1023, 153}; 154 155static 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 251static unsigned long pcm990_irq_enabled; 252 253static 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 262static 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 278static struct irq_chip pcm990_irq_chip = { 279 .irq_mask_ack = pcm990_mask_ack_irq, 280 .irq_unmask = pcm990_unmask_irq, 281}; 282 283static 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 303static 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 322static 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 336static 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 352static 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 359static 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 367static 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 */ 379void __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}