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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 | /* * linux/arch/arm/mach-pxa/pxa27x.c * * Author: Nicolas Pitre * Created: Nov 05, 2002 * Copyright: MontaVista Software Inc. * * Code specific to PXA27x aka Bulverde. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/suspend.h> #include <linux/platform_device.h> #include <linux/sysdev.h> #include <asm/hardware.h> #include <asm/irq.h> #include <asm/arch/irqs.h> #include <asm/arch/pxa-regs.h> #include <asm/arch/pxa2xx-regs.h> #include <asm/arch/mfp-pxa27x.h> #include <asm/arch/ohci.h> #include <asm/arch/pm.h> #include <asm/arch/dma.h> #include <asm/arch/i2c.h> #include "generic.h" #include "devices.h" #include "clock.h" /* Crystal clock: 13MHz */ #define BASE_CLK 13000000 /* * Get the clock frequency as reflected by CCSR and the turbo flag. * We assume these values have been applied via a fcs. * If info is not 0 we also display the current settings. */ unsigned int pxa27x_get_clk_frequency_khz(int info) { unsigned long ccsr, clkcfg; unsigned int l, L, m, M, n2, N, S; int cccr_a, t, ht, b; ccsr = CCSR; cccr_a = CCCR & (1 << 25); /* Read clkcfg register: it has turbo, b, half-turbo (and f) */ asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) ); t = clkcfg & (1 << 0); ht = clkcfg & (1 << 2); b = clkcfg & (1 << 3); l = ccsr & 0x1f; n2 = (ccsr>>7) & 0xf; m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4; L = l * BASE_CLK; N = (L * n2) / 2; M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2)); S = (b) ? L : (L/2); if (info) { printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n", L / 1000000, (L % 1000000) / 10000, l ); printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n", N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5, (t) ? "" : "in" ); printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n", M / 1000000, (M % 1000000) / 10000, m ); printk( KERN_INFO "System bus clock: %d.%02dMHz \n", S / 1000000, (S % 1000000) / 10000 ); } return (t) ? (N/1000) : (L/1000); } /* * Return the current mem clock frequency in units of 10kHz as * reflected by CCCR[A], B, and L */ unsigned int pxa27x_get_memclk_frequency_10khz(void) { unsigned long ccsr, clkcfg; unsigned int l, L, m, M; int cccr_a, b; ccsr = CCSR; cccr_a = CCCR & (1 << 25); /* Read clkcfg register: it has turbo, b, half-turbo (and f) */ asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) ); b = clkcfg & (1 << 3); l = ccsr & 0x1f; m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4; L = l * BASE_CLK; M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2)); return (M / 10000); } /* * Return the current LCD clock frequency in units of 10kHz as */ static unsigned int pxa27x_get_lcdclk_frequency_10khz(void) { unsigned long ccsr; unsigned int l, L, k, K; ccsr = CCSR; l = ccsr & 0x1f; k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4; L = l * BASE_CLK; K = L / k; return (K / 10000); } static unsigned long clk_pxa27x_lcd_getrate(struct clk *clk) { return pxa27x_get_lcdclk_frequency_10khz() * 10000; } static const struct clkops clk_pxa27x_lcd_ops = { .enable = clk_cken_enable, .disable = clk_cken_disable, .getrate = clk_pxa27x_lcd_getrate, }; static struct clk pxa27x_clks[] = { INIT_CK("LCDCLK", LCD, &clk_pxa27x_lcd_ops, &pxa_device_fb.dev), INIT_CK("CAMCLK", CAMERA, &clk_pxa27x_lcd_ops, NULL), INIT_CKEN("UARTCLK", FFUART, 14857000, 1, &pxa_device_ffuart.dev), INIT_CKEN("UARTCLK", BTUART, 14857000, 1, &pxa_device_btuart.dev), INIT_CKEN("UARTCLK", STUART, 14857000, 1, NULL), INIT_CKEN("I2SCLK", I2S, 14682000, 0, &pxa_device_i2s.dev), INIT_CKEN("I2CCLK", I2C, 32842000, 0, &pxa_device_i2c.dev), INIT_CKEN("UDCCLK", USB, 48000000, 5, &pxa27x_device_udc.dev), INIT_CKEN("MMCCLK", MMC, 19500000, 0, &pxa_device_mci.dev), INIT_CKEN("FICPCLK", FICP, 48000000, 0, &pxa_device_ficp.dev), INIT_CKEN("USBCLK", USBHOST, 48000000, 0, &pxa27x_device_ohci.dev), INIT_CKEN("I2CCLK", PWRI2C, 13000000, 0, &pxa27x_device_i2c_power.dev), INIT_CKEN("KBDCLK", KEYPAD, 32768, 0, &pxa27x_device_keypad.dev), INIT_CKEN("SSPCLK", SSP1, 13000000, 0, &pxa27x_device_ssp1.dev), INIT_CKEN("SSPCLK", SSP2, 13000000, 0, &pxa27x_device_ssp2.dev), INIT_CKEN("SSPCLK", SSP3, 13000000, 0, &pxa27x_device_ssp3.dev), INIT_CKEN("PWMCLK", PWM0, 13000000, 0, &pxa27x_device_pwm0.dev), INIT_CKEN("PWMCLK", PWM1, 13000000, 0, &pxa27x_device_pwm1.dev), INIT_CKEN("AC97CLK", AC97, 24576000, 0, NULL), INIT_CKEN("AC97CONFCLK", AC97CONF, 24576000, 0, NULL), /* INIT_CKEN("MSLCLK", MSL, 48000000, 0, NULL), INIT_CKEN("USIMCLK", USIM, 48000000, 0, NULL), INIT_CKEN("MSTKCLK", MEMSTK, 19500000, 0, NULL), INIT_CKEN("IMCLK", IM, 0, 0, NULL), INIT_CKEN("MEMCLK", MEMC, 0, 0, NULL), */ }; #ifdef CONFIG_PM #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x] /* * List of global PXA peripheral registers to preserve. * More ones like CP and general purpose register values are preserved * with the stack pointer in sleep.S. */ enum { SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2, SLEEP_SAVE_PGSR3, SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U, SLEEP_SAVE_GAFR1_L, SLEEP_SAVE_GAFR1_U, SLEEP_SAVE_GAFR2_L, SLEEP_SAVE_GAFR2_U, SLEEP_SAVE_GAFR3_L, SLEEP_SAVE_GAFR3_U, SLEEP_SAVE_PSTR, SLEEP_SAVE_CKEN, SLEEP_SAVE_MDREFR, SLEEP_SAVE_PWER, SLEEP_SAVE_PCFR, SLEEP_SAVE_PRER, SLEEP_SAVE_PFER, SLEEP_SAVE_PKWR, SLEEP_SAVE_COUNT }; void pxa27x_cpu_pm_save(unsigned long *sleep_save) { SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2); SAVE(PGSR3); SAVE(GAFR0_L); SAVE(GAFR0_U); SAVE(GAFR1_L); SAVE(GAFR1_U); SAVE(GAFR2_L); SAVE(GAFR2_U); SAVE(GAFR3_L); SAVE(GAFR3_U); SAVE(MDREFR); SAVE(PWER); SAVE(PCFR); SAVE(PRER); SAVE(PFER); SAVE(PKWR); SAVE(CKEN); SAVE(PSTR); } void pxa27x_cpu_pm_restore(unsigned long *sleep_save) { /* ensure not to come back here if it wasn't intended */ PSPR = 0; /* restore registers */ RESTORE(GAFR0_L); RESTORE(GAFR0_U); RESTORE(GAFR1_L); RESTORE(GAFR1_U); RESTORE(GAFR2_L); RESTORE(GAFR2_U); RESTORE(GAFR3_L); RESTORE(GAFR3_U); RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2); RESTORE(PGSR3); RESTORE(MDREFR); RESTORE(PWER); RESTORE(PCFR); RESTORE(PRER); RESTORE(PFER); RESTORE(PKWR); PSSR = PSSR_RDH | PSSR_PH; RESTORE(CKEN); RESTORE(PSTR); } void pxa27x_cpu_pm_enter(suspend_state_t state) { extern void pxa_cpu_standby(void); /* ensure voltage-change sequencer not initiated, which hangs */ PCFR &= ~PCFR_FVC; /* Clear edge-detect status register. */ PEDR = 0xDF12FE1B; /* Clear reset status */ RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR; switch (state) { case PM_SUSPEND_STANDBY: pxa_cpu_standby(); break; case PM_SUSPEND_MEM: /* set resume return address */ PSPR = virt_to_phys(pxa_cpu_resume); pxa27x_cpu_suspend(PWRMODE_SLEEP); break; } } static int pxa27x_cpu_pm_valid(suspend_state_t state) { return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY; } static struct pxa_cpu_pm_fns pxa27x_cpu_pm_fns = { .save_count = SLEEP_SAVE_COUNT, .save = pxa27x_cpu_pm_save, .restore = pxa27x_cpu_pm_restore, .valid = pxa27x_cpu_pm_valid, .enter = pxa27x_cpu_pm_enter, }; static void __init pxa27x_init_pm(void) { pxa_cpu_pm_fns = &pxa27x_cpu_pm_fns; } #else static inline void pxa27x_init_pm(void) {} #endif /* PXA27x: Various gpios can issue wakeup events. This logic only * handles the simple cases, not the WEMUX2 and WEMUX3 options */ static int pxa27x_set_wake(unsigned int irq, unsigned int on) { int gpio = IRQ_TO_GPIO(irq); uint32_t mask; if (gpio >= 0 && gpio < 128) return gpio_set_wake(gpio, on); if (irq == IRQ_KEYPAD) return keypad_set_wake(on); switch (irq) { case IRQ_RTCAlrm: mask = PWER_RTC; break; case IRQ_USB: mask = 1u << 26; break; default: return -EINVAL; } if (on) PWER |= mask; else PWER &=~mask; return 0; } void __init pxa27x_init_irq(void) { pxa_init_irq(34, pxa27x_set_wake); pxa_init_gpio(128, pxa27x_set_wake); } /* * device registration specific to PXA27x. */ static struct resource i2c_power_resources[] = { { .start = 0x40f00180, .end = 0x40f001a3, .flags = IORESOURCE_MEM, }, { .start = IRQ_PWRI2C, .end = IRQ_PWRI2C, .flags = IORESOURCE_IRQ, }, }; struct platform_device pxa27x_device_i2c_power = { .name = "pxa2xx-i2c", .id = 1, .resource = i2c_power_resources, .num_resources = ARRAY_SIZE(i2c_power_resources), }; void __init pxa_set_i2c_power_info(struct i2c_pxa_platform_data *info) { local_irq_disable(); PCFR |= PCFR_PI2CEN; local_irq_enable(); pxa27x_device_i2c_power.dev.platform_data = info; } static struct platform_device *devices[] __initdata = { &pxa27x_device_udc, &pxa_device_ffuart, &pxa_device_btuart, &pxa_device_stuart, &pxa_device_i2s, &pxa_device_rtc, &pxa27x_device_i2c_power, &pxa27x_device_ssp1, &pxa27x_device_ssp2, &pxa27x_device_ssp3, &pxa27x_device_pwm0, &pxa27x_device_pwm1, }; static struct sys_device pxa27x_sysdev[] = { { .cls = &pxa_irq_sysclass, }, { .cls = &pxa_gpio_sysclass, }, }; static int __init pxa27x_init(void) { int i, ret = 0; if (cpu_is_pxa27x()) { clks_register(pxa27x_clks, ARRAY_SIZE(pxa27x_clks)); if ((ret = pxa_init_dma(32))) return ret; pxa27x_init_pm(); for (i = 0; i < ARRAY_SIZE(pxa27x_sysdev); i++) { ret = sysdev_register(&pxa27x_sysdev[i]); if (ret) pr_err("failed to register sysdev[%d]\n", i); } ret = platform_add_devices(devices, ARRAY_SIZE(devices)); } return ret; } postcore_initcall(pxa27x_init); |