2 * linux/arch/arm/mach-pxa/pxa3xx.c
4 * code specific to pxa3xx aka Monahans
6 * Copyright (C) 2006 Marvell International Ltd.
8 * 2007-09-02: eric miao <eric.miao@marvell.com>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/module.h>
17 #include <linux/kernel.h>
18 #include <linux/init.h>
20 #include <linux/platform_device.h>
21 #include <linux/irq.h>
23 #include <linux/sysdev.h>
25 #include <asm/mach/map.h>
26 #include <mach/hardware.h>
27 #include <mach/gpio.h>
28 #include <mach/pxa3xx-regs.h>
29 #include <mach/reset.h>
30 #include <mach/ohci.h>
33 #include <mach/regs-intc.h>
40 /* Crystal clock: 13MHz */
41 #define BASE_CLK 13000000
43 /* Ring Oscillator Clock: 60MHz */
44 #define RO_CLK 60000000
46 #define ACCR_D0CS (1 << 26)
47 #define ACCR_PCCE (1 << 11)
49 #define PECR_IE(n) ((1 << ((n) * 2)) << 28)
50 #define PECR_IS(n) ((1 << ((n) * 2)) << 29)
52 /* crystal frequency to static memory controller multiplier (SMCFS) */
53 static unsigned char smcfs_mult[8] = { 6, 0, 8, 0, 0, 16, };
55 /* crystal frequency to HSIO bus frequency multiplier (HSS) */
56 static unsigned char hss_mult[4] = { 8, 12, 16, 24 };
59 * Get the clock frequency as reflected by CCSR and the turbo flag.
60 * We assume these values have been applied via a fcs.
61 * If info is not 0 we also display the current settings.
63 unsigned int pxa3xx_get_clk_frequency_khz(int info)
65 unsigned long acsr, xclkcfg;
66 unsigned int t, xl, xn, hss, ro, XL, XN, CLK, HSS;
68 /* Read XCLKCFG register turbo bit */
69 __asm__ __volatile__("mrc\tp14, 0, %0, c6, c0, 0" : "=r"(xclkcfg));
75 xn = (acsr >> 8) & 0x7;
76 hss = (acsr >> 14) & 0x3;
81 ro = acsr & ACCR_D0CS;
83 CLK = (ro) ? RO_CLK : ((t) ? XN : XL);
84 HSS = (ro) ? RO_CLK : hss_mult[hss] * BASE_CLK;
87 pr_info("RO Mode clock: %d.%02dMHz (%sactive)\n",
88 RO_CLK / 1000000, (RO_CLK % 1000000) / 10000,
90 pr_info("Run Mode clock: %d.%02dMHz (*%d)\n",
91 XL / 1000000, (XL % 1000000) / 10000, xl);
92 pr_info("Turbo Mode clock: %d.%02dMHz (*%d, %sactive)\n",
93 XN / 1000000, (XN % 1000000) / 10000, xn,
95 pr_info("HSIO bus clock: %d.%02dMHz\n",
96 HSS / 1000000, (HSS % 1000000) / 10000);
102 void pxa3xx_clear_reset_status(unsigned int mask)
104 /* RESET_STATUS_* has a 1:1 mapping with ARSR */
109 * Return the current AC97 clock frequency.
111 static unsigned long clk_pxa3xx_ac97_getrate(struct clk *clk)
113 unsigned long rate = 312000000;
114 unsigned long ac97_div;
118 /* This may loose precision for some rates but won't for the
119 * standard 24.576MHz.
121 rate /= (ac97_div >> 12) & 0x7fff;
122 rate *= (ac97_div & 0xfff);
128 * Return the current HSIO bus clock frequency
130 static unsigned long clk_pxa3xx_hsio_getrate(struct clk *clk)
133 unsigned int hss, hsio_clk;
137 hss = (acsr >> 14) & 0x3;
138 hsio_clk = (acsr & ACCR_D0CS) ? RO_CLK : hss_mult[hss] * BASE_CLK;
143 void clk_pxa3xx_cken_enable(struct clk *clk)
145 unsigned long mask = 1ul << (clk->cken & 0x1f);
153 void clk_pxa3xx_cken_disable(struct clk *clk)
155 unsigned long mask = 1ul << (clk->cken & 0x1f);
163 const struct clkops clk_pxa3xx_cken_ops = {
164 .enable = clk_pxa3xx_cken_enable,
165 .disable = clk_pxa3xx_cken_disable,
168 static const struct clkops clk_pxa3xx_hsio_ops = {
169 .enable = clk_pxa3xx_cken_enable,
170 .disable = clk_pxa3xx_cken_disable,
171 .getrate = clk_pxa3xx_hsio_getrate,
174 static const struct clkops clk_pxa3xx_ac97_ops = {
175 .enable = clk_pxa3xx_cken_enable,
176 .disable = clk_pxa3xx_cken_disable,
177 .getrate = clk_pxa3xx_ac97_getrate,
180 static void clk_pout_enable(struct clk *clk)
185 static void clk_pout_disable(struct clk *clk)
190 static const struct clkops clk_pout_ops = {
191 .enable = clk_pout_enable,
192 .disable = clk_pout_disable,
195 static void clk_dummy_enable(struct clk *clk)
199 static void clk_dummy_disable(struct clk *clk)
203 static const struct clkops clk_dummy_ops = {
204 .enable = clk_dummy_enable,
205 .disable = clk_dummy_disable,
208 static struct clk clk_pxa3xx_pout = {
209 .ops = &clk_pout_ops,
214 static struct clk clk_dummy = {
215 .ops = &clk_dummy_ops,
218 static DEFINE_PXA3_CK(pxa3xx_lcd, LCD, &clk_pxa3xx_hsio_ops);
219 static DEFINE_PXA3_CK(pxa3xx_camera, CAMERA, &clk_pxa3xx_hsio_ops);
220 static DEFINE_PXA3_CK(pxa3xx_ac97, AC97, &clk_pxa3xx_ac97_ops);
221 static DEFINE_PXA3_CKEN(pxa3xx_ffuart, FFUART, 14857000, 1);
222 static DEFINE_PXA3_CKEN(pxa3xx_btuart, BTUART, 14857000, 1);
223 static DEFINE_PXA3_CKEN(pxa3xx_stuart, STUART, 14857000, 1);
224 static DEFINE_PXA3_CKEN(pxa3xx_i2c, I2C, 32842000, 0);
225 static DEFINE_PXA3_CKEN(pxa3xx_udc, UDC, 48000000, 5);
226 static DEFINE_PXA3_CKEN(pxa3xx_usbh, USBH, 48000000, 0);
227 static DEFINE_PXA3_CKEN(pxa3xx_u2d, USB2, 48000000, 0);
228 static DEFINE_PXA3_CKEN(pxa3xx_keypad, KEYPAD, 32768, 0);
229 static DEFINE_PXA3_CKEN(pxa3xx_ssp1, SSP1, 13000000, 0);
230 static DEFINE_PXA3_CKEN(pxa3xx_ssp2, SSP2, 13000000, 0);
231 static DEFINE_PXA3_CKEN(pxa3xx_ssp3, SSP3, 13000000, 0);
232 static DEFINE_PXA3_CKEN(pxa3xx_ssp4, SSP4, 13000000, 0);
233 static DEFINE_PXA3_CKEN(pxa3xx_pwm0, PWM0, 13000000, 0);
234 static DEFINE_PXA3_CKEN(pxa3xx_pwm1, PWM1, 13000000, 0);
235 static DEFINE_PXA3_CKEN(pxa3xx_mmc1, MMC1, 19500000, 0);
236 static DEFINE_PXA3_CKEN(pxa3xx_mmc2, MMC2, 19500000, 0);
238 static struct clk_lookup pxa3xx_clkregs[] = {
239 INIT_CLKREG(&clk_pxa3xx_pout, NULL, "CLK_POUT"),
240 /* Power I2C clock is always on */
241 INIT_CLKREG(&clk_dummy, "pxa3xx-pwri2c.1", NULL),
242 INIT_CLKREG(&clk_pxa3xx_lcd, "pxa2xx-fb", NULL),
243 INIT_CLKREG(&clk_pxa3xx_camera, NULL, "CAMCLK"),
244 INIT_CLKREG(&clk_pxa3xx_ac97, NULL, "AC97CLK"),
245 INIT_CLKREG(&clk_pxa3xx_ffuart, "pxa2xx-uart.0", NULL),
246 INIT_CLKREG(&clk_pxa3xx_btuart, "pxa2xx-uart.1", NULL),
247 INIT_CLKREG(&clk_pxa3xx_stuart, "pxa2xx-uart.2", NULL),
248 INIT_CLKREG(&clk_pxa3xx_stuart, "pxa2xx-ir", "UARTCLK"),
249 INIT_CLKREG(&clk_pxa3xx_i2c, "pxa2xx-i2c.0", NULL),
250 INIT_CLKREG(&clk_pxa3xx_udc, "pxa27x-udc", NULL),
251 INIT_CLKREG(&clk_pxa3xx_usbh, "pxa27x-ohci", NULL),
252 INIT_CLKREG(&clk_pxa3xx_u2d, "pxa3xx-u2d", NULL),
253 INIT_CLKREG(&clk_pxa3xx_keypad, "pxa27x-keypad", NULL),
254 INIT_CLKREG(&clk_pxa3xx_ssp1, "pxa27x-ssp.0", NULL),
255 INIT_CLKREG(&clk_pxa3xx_ssp2, "pxa27x-ssp.1", NULL),
256 INIT_CLKREG(&clk_pxa3xx_ssp3, "pxa27x-ssp.2", NULL),
257 INIT_CLKREG(&clk_pxa3xx_ssp4, "pxa27x-ssp.3", NULL),
258 INIT_CLKREG(&clk_pxa3xx_pwm0, "pxa27x-pwm.0", NULL),
259 INIT_CLKREG(&clk_pxa3xx_pwm1, "pxa27x-pwm.1", NULL),
260 INIT_CLKREG(&clk_pxa3xx_mmc1, "pxa2xx-mci.0", NULL),
261 INIT_CLKREG(&clk_pxa3xx_mmc2, "pxa2xx-mci.1", NULL),
266 #define ISRAM_START 0x5c000000
267 #define ISRAM_SIZE SZ_256K
269 static void __iomem *sram;
270 static unsigned long wakeup_src;
272 #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
273 #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
275 enum { SLEEP_SAVE_CKENA,
282 static void pxa3xx_cpu_pm_save(unsigned long *sleep_save)
289 static void pxa3xx_cpu_pm_restore(unsigned long *sleep_save)
297 * Enter a standby mode (S0D1C2 or S0D2C2). Upon wakeup, the dynamic
298 * memory controller has to be reinitialised, so we place some code
299 * in the SRAM to perform this function.
301 * We disable FIQs across the standby - otherwise, we might receive a
302 * FIQ while the SDRAM is unavailable.
304 static void pxa3xx_cpu_standby(unsigned int pwrmode)
306 extern const char pm_enter_standby_start[], pm_enter_standby_end[];
307 void (*fn)(unsigned int) = (void __force *)(sram + 0x8000);
309 memcpy_toio(sram + 0x8000, pm_enter_standby_start,
310 pm_enter_standby_end - pm_enter_standby_start);
314 AD2D0ER = wakeup_src;
328 * NOTE: currently, the OBM (OEM Boot Module) binary comes along with
329 * PXA3xx development kits assumes that the resuming process continues
330 * with the address stored within the first 4 bytes of SDRAM. The PSPR
331 * register is used privately by BootROM and OBM, and _must_ be set to
332 * 0x5c014000 for the moment.
334 static void pxa3xx_cpu_pm_suspend(void)
336 volatile unsigned long *p = (volatile void *)0xc0000000;
337 unsigned long saved_data = *p;
339 extern void pxa3xx_cpu_suspend(void);
340 extern void pxa3xx_cpu_resume(void);
342 /* resuming from D2 requires the HSIO2/BOOT/TPM clocks enabled */
343 CKENA |= (1 << CKEN_BOOT) | (1 << CKEN_TPM);
344 CKENB |= 1 << (CKEN_HSIO2 & 0x1f);
346 /* clear and setup wakeup source */
352 PCFR |= (1u << 13); /* L1_DIS */
353 PCFR &= ~((1u << 12) | (1u << 1)); /* L0_EN | SL_ROD */
357 /* overwrite with the resume address */
358 *p = virt_to_phys(pxa3xx_cpu_resume);
360 pxa3xx_cpu_suspend();
367 static void pxa3xx_cpu_pm_enter(suspend_state_t state)
370 * Don't sleep if no wakeup sources are defined
372 if (wakeup_src == 0) {
373 printk(KERN_ERR "Not suspending: no wakeup sources\n");
378 case PM_SUSPEND_STANDBY:
379 pxa3xx_cpu_standby(PXA3xx_PM_S0D2C2);
383 pxa3xx_cpu_pm_suspend();
388 static int pxa3xx_cpu_pm_valid(suspend_state_t state)
390 return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
393 static struct pxa_cpu_pm_fns pxa3xx_cpu_pm_fns = {
394 .save_count = SLEEP_SAVE_COUNT,
395 .save = pxa3xx_cpu_pm_save,
396 .restore = pxa3xx_cpu_pm_restore,
397 .valid = pxa3xx_cpu_pm_valid,
398 .enter = pxa3xx_cpu_pm_enter,
401 static void __init pxa3xx_init_pm(void)
403 sram = ioremap(ISRAM_START, ISRAM_SIZE);
405 printk(KERN_ERR "Unable to map ISRAM: disabling standby/suspend\n");
410 * Since we copy wakeup code into the SRAM, we need to ensure
411 * that it is preserved over the low power modes. Note: bit 8
412 * is undocumented in the developer manual, but must be set.
414 AD1R |= ADXR_L2 | ADXR_R0;
415 AD2R |= ADXR_L2 | ADXR_R0;
416 AD3R |= ADXR_L2 | ADXR_R0;
419 * Clear the resume enable registers.
426 pxa_cpu_pm_fns = &pxa3xx_cpu_pm_fns;
429 static int pxa3xx_set_wake(unsigned int irq, unsigned int on)
431 unsigned long flags, mask = 0;
435 mask = ADXER_MFP_WSSP3;
448 mask = ADXER_MFP_WAC97;
454 mask = ADXER_MFP_WSSP2;
457 mask = ADXER_MFP_WI2C;
460 mask = ADXER_MFP_WUART3;
463 mask = ADXER_MFP_WUART2;
466 mask = ADXER_MFP_WUART1;
469 mask = ADXER_MFP_WMMC1;
472 mask = ADXER_MFP_WSSP1;
478 mask = ADXER_MFP_WSSP4;
487 mask = ADXER_MFP_WMMC2;
490 mask = ADXER_MFP_WFLASH;
496 mask = ADXER_WEXTWAKE0;
499 mask = ADXER_WEXTWAKE1;
502 mask = ADXER_MFP_GEN12;
508 local_irq_save(flags);
513 local_irq_restore(flags);
518 static inline void pxa3xx_init_pm(void) {}
519 #define pxa3xx_set_wake NULL
522 static void pxa_ack_ext_wakeup(unsigned int irq)
524 PECR |= PECR_IS(irq - IRQ_WAKEUP0);
527 static void pxa_mask_ext_wakeup(unsigned int irq)
529 ICMR2 &= ~(1 << ((irq - PXA_IRQ(0)) & 0x1f));
530 PECR &= ~PECR_IE(irq - IRQ_WAKEUP0);
533 static void pxa_unmask_ext_wakeup(unsigned int irq)
535 ICMR2 |= 1 << ((irq - PXA_IRQ(0)) & 0x1f);
536 PECR |= PECR_IE(irq - IRQ_WAKEUP0);
539 static int pxa_set_ext_wakeup_type(unsigned int irq, unsigned int flow_type)
541 if (flow_type & IRQ_TYPE_EDGE_RISING)
542 PWER |= 1 << (irq - IRQ_WAKEUP0);
544 if (flow_type & IRQ_TYPE_EDGE_FALLING)
545 PWER |= 1 << (irq - IRQ_WAKEUP0 + 2);
550 static struct irq_chip pxa_ext_wakeup_chip = {
552 .ack = pxa_ack_ext_wakeup,
553 .mask = pxa_mask_ext_wakeup,
554 .unmask = pxa_unmask_ext_wakeup,
555 .set_type = pxa_set_ext_wakeup_type,
558 static void __init pxa_init_ext_wakeup_irq(set_wake_t fn)
562 for (irq = IRQ_WAKEUP0; irq <= IRQ_WAKEUP1; irq++) {
563 set_irq_chip(irq, &pxa_ext_wakeup_chip);
564 set_irq_handler(irq, handle_edge_irq);
565 set_irq_flags(irq, IRQF_VALID);
568 pxa_ext_wakeup_chip.set_wake = fn;
571 void __init pxa3xx_init_irq(void)
573 /* enable CP6 access */
575 __asm__ __volatile__("mrc p15, 0, %0, c15, c1, 0\n": "=r"(value));
577 __asm__ __volatile__("mcr p15, 0, %0, c15, c1, 0\n": :"r"(value));
579 pxa_init_irq(56, pxa3xx_set_wake);
580 pxa_init_ext_wakeup_irq(pxa3xx_set_wake);
581 pxa_init_gpio(IRQ_GPIO_2_x, 2, 127, NULL);
584 static struct map_desc pxa3xx_io_desc[] __initdata = {
586 .virtual = 0xf6000000,
587 .pfn = __phys_to_pfn(0x4a000000),
588 .length = 0x00200000,
593 void __init pxa3xx_map_io(void)
596 iotable_init(ARRAY_AND_SIZE(pxa3xx_io_desc));
597 pxa3xx_get_clk_frequency_khz(1);
601 * device registration specific to PXA3xx.
604 void __init pxa3xx_set_i2c_power_info(struct i2c_pxa_platform_data *info)
606 pxa_register_device(&pxa3xx_device_i2c_power, info);
609 static struct platform_device *devices[] __initdata = {
613 &pxa_device_asoc_ssp1,
614 &pxa_device_asoc_ssp2,
615 &pxa_device_asoc_ssp3,
616 &pxa_device_asoc_ssp4,
617 &pxa_device_asoc_platform,
628 static struct sys_device pxa3xx_sysdev[] = {
630 .cls = &pxa_irq_sysclass,
632 .cls = &pxa3xx_mfp_sysclass,
634 .cls = &pxa_gpio_sysclass,
638 static int __init pxa3xx_init(void)
642 if (cpu_is_pxa3xx()) {
647 * clear RDH bit every time after reset
649 * Note: the last 3 bits DxS are write-1-to-clear so carefully
650 * preserve them here in case they will be referenced later
652 ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S);
654 clkdev_add_table(pxa3xx_clkregs, ARRAY_SIZE(pxa3xx_clkregs));
656 if ((ret = pxa_init_dma(IRQ_DMA, 32)))
661 for (i = 0; i < ARRAY_SIZE(pxa3xx_sysdev); i++) {
662 ret = sysdev_register(&pxa3xx_sysdev[i]);
664 pr_err("failed to register sysdev[%d]\n", i);
667 ret = platform_add_devices(devices, ARRAY_SIZE(devices));
673 postcore_initcall(pxa3xx_init);