2 * linux/arch/arm/mach-pxa/pxa25x.c
4 * Author: Nicolas Pitre
5 * Created: Jun 15, 2001
6 * Copyright: MontaVista Software Inc.
8 * Code specific to PXA21x/25x/26x variants.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 * Since this file should be linked before any other machine specific file,
15 * the __initcall() here will be executed first. This serves as default
16 * initialization stuff for PXA machines which can be overridden later if
19 #include <linux/module.h>
20 #include <linux/kernel.h>
21 #include <linux/init.h>
22 #include <linux/platform_device.h>
23 #include <linux/suspend.h>
24 #include <linux/sysdev.h>
26 #include <mach/hardware.h>
27 #include <mach/irqs.h>
28 #include <mach/pxa-regs.h>
29 #include <mach/pxa2xx-regs.h>
30 #include <mach/mfp-pxa25x.h>
31 #include <mach/reset.h>
39 int cpu_is_pxa26x(void)
41 return cpu_is_pxa250() && ((BOOT_DEF & 0x8) == 0);
43 EXPORT_SYMBOL_GPL(cpu_is_pxa26x);
46 * Various clock factors driven by the CCCR register.
49 /* Crystal Frequency to Memory Frequency Multiplier (L) */
50 static unsigned char L_clk_mult[32] = { 0, 27, 32, 36, 40, 45, 0, };
52 /* Memory Frequency to Run Mode Frequency Multiplier (M) */
53 static unsigned char M_clk_mult[4] = { 0, 1, 2, 4 };
55 /* Run Mode Frequency to Turbo Mode Frequency Multiplier (N) */
56 /* Note: we store the value N * 2 here. */
57 static unsigned char N2_clk_mult[8] = { 0, 0, 2, 3, 4, 0, 6, 0 };
60 #define BASE_CLK 3686400
63 * Get the clock frequency as reflected by CCCR and the turbo flag.
64 * We assume these values have been applied via a fcs.
65 * If info is not 0 we also display the current settings.
67 unsigned int pxa25x_get_clk_frequency_khz(int info)
69 unsigned long cccr, turbo;
70 unsigned int l, L, m, M, n2, N;
73 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (turbo) );
75 l = L_clk_mult[(cccr >> 0) & 0x1f];
76 m = M_clk_mult[(cccr >> 5) & 0x03];
77 n2 = N2_clk_mult[(cccr >> 7) & 0x07];
86 printk( KERN_INFO "Memory clock: %d.%02dMHz (*%d)\n",
87 L / 1000000, (L % 1000000) / 10000, l );
89 printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
90 M / 1000000, (M % 1000000) / 10000, m );
92 printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
93 N / 1000000, (N % 1000000) / 10000, n2 / 2, (n2 % 2) * 5,
94 (turbo & 1) ? "" : "in" );
97 return (turbo & 1) ? (N/1000) : (M/1000);
101 * Return the current memory clock frequency in units of 10kHz
103 unsigned int pxa25x_get_memclk_frequency_10khz(void)
105 return L_clk_mult[(CCCR >> 0) & 0x1f] * BASE_CLK / 10000;
108 static unsigned long clk_pxa25x_lcd_getrate(struct clk *clk)
110 return pxa25x_get_memclk_frequency_10khz() * 10000;
113 static const struct clkops clk_pxa25x_lcd_ops = {
114 .enable = clk_cken_enable,
115 .disable = clk_cken_disable,
116 .getrate = clk_pxa25x_lcd_getrate,
119 static unsigned long gpio12_config_32k[] = {
123 static unsigned long gpio12_config_gpio[] = {
127 static void clk_gpio12_enable(struct clk *clk)
129 pxa2xx_mfp_config(gpio12_config_32k, 1);
132 static void clk_gpio12_disable(struct clk *clk)
134 pxa2xx_mfp_config(gpio12_config_gpio, 1);
137 static const struct clkops clk_pxa25x_gpio12_ops = {
138 .enable = clk_gpio12_enable,
139 .disable = clk_gpio12_disable,
142 static unsigned long gpio11_config_3m6[] = {
146 static unsigned long gpio11_config_gpio[] = {
150 static void clk_gpio11_enable(struct clk *clk)
152 pxa2xx_mfp_config(gpio11_config_3m6, 1);
155 static void clk_gpio11_disable(struct clk *clk)
157 pxa2xx_mfp_config(gpio11_config_gpio, 1);
160 static const struct clkops clk_pxa25x_gpio11_ops = {
161 .enable = clk_gpio11_enable,
162 .disable = clk_gpio11_disable,
166 * 3.6864MHz -> OST, GPIO, SSP, PWM, PLLs (95.842MHz, 147.456MHz)
167 * 95.842MHz -> MMC 19.169MHz, I2C 31.949MHz, FICP 47.923MHz, USB 47.923MHz
168 * 147.456MHz -> UART 14.7456MHz, AC97 12.288MHz, I2S 5.672MHz (allegedly)
170 static struct clk pxa25x_hwuart_clk =
171 INIT_CKEN("UARTCLK", HWUART, 14745600, 1, &pxa_device_hwuart.dev)
175 * PXA 2xx clock declarations.
177 static struct clk pxa25x_clks[] = {
178 INIT_CK("LCDCLK", LCD, &clk_pxa25x_lcd_ops, &pxa_device_fb.dev),
179 INIT_CKEN("UARTCLK", FFUART, 14745600, 1, &pxa_device_ffuart.dev),
180 INIT_CKEN("UARTCLK", BTUART, 14745600, 1, &pxa_device_btuart.dev),
181 INIT_CKEN("UARTCLK", STUART, 14745600, 1, NULL),
182 INIT_CKEN("UDCCLK", USB, 47923000, 5, &pxa25x_device_udc.dev),
183 INIT_CLK("GPIO11_CLK", &clk_pxa25x_gpio11_ops, 3686400, 0, NULL),
184 INIT_CLK("GPIO12_CLK", &clk_pxa25x_gpio12_ops, 32768, 0, NULL),
185 INIT_CKEN("MMCCLK", MMC, 19169000, 0, &pxa_device_mci.dev),
186 INIT_CKEN("I2CCLK", I2C, 31949000, 0, &pxa_device_i2c.dev),
188 INIT_CKEN("SSPCLK", SSP, 3686400, 0, &pxa25x_device_ssp.dev),
189 INIT_CKEN("SSPCLK", NSSP, 3686400, 0, &pxa25x_device_nssp.dev),
190 INIT_CKEN("SSPCLK", ASSP, 3686400, 0, &pxa25x_device_assp.dev),
191 INIT_CKEN("PWMCLK", PWM0, 3686400, 0, &pxa25x_device_pwm0.dev),
192 INIT_CKEN("PWMCLK", PWM1, 3686400, 0, &pxa25x_device_pwm1.dev),
194 INIT_CKEN("AC97CLK", AC97, 24576000, 0, NULL),
197 INIT_CKEN("I2SCLK", I2S, 14745600, 0, NULL),
199 INIT_CKEN("FICPCLK", FICP, 47923000, 0, NULL),
204 #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
205 #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
208 * List of global PXA peripheral registers to preserve.
209 * More ones like CP and general purpose register values are preserved
210 * with the stack pointer in sleep.S.
219 static void pxa25x_cpu_pm_save(unsigned long *sleep_save)
225 static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
231 static void pxa25x_cpu_pm_enter(suspend_state_t state)
233 /* Clear reset status */
234 RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
238 pxa25x_cpu_suspend(PWRMODE_SLEEP);
243 static int pxa25x_cpu_pm_prepare(void)
245 /* set resume return address */
246 PSPR = virt_to_phys(pxa_cpu_resume);
250 static void pxa25x_cpu_pm_finish(void)
252 /* ensure not to come back here if it wasn't intended */
256 static struct pxa_cpu_pm_fns pxa25x_cpu_pm_fns = {
257 .save_count = SLEEP_SAVE_COUNT,
258 .valid = suspend_valid_only_mem,
259 .save = pxa25x_cpu_pm_save,
260 .restore = pxa25x_cpu_pm_restore,
261 .enter = pxa25x_cpu_pm_enter,
262 .prepare = pxa25x_cpu_pm_prepare,
263 .finish = pxa25x_cpu_pm_finish,
266 static void __init pxa25x_init_pm(void)
268 pxa_cpu_pm_fns = &pxa25x_cpu_pm_fns;
271 static inline void pxa25x_init_pm(void) {}
274 /* PXA25x: supports wakeup from GPIO0..GPIO15 and RTC alarm
277 static int pxa25x_set_wake(unsigned int irq, unsigned int on)
279 int gpio = IRQ_TO_GPIO(irq);
282 if (gpio >= 0 && gpio < 85)
283 return gpio_set_wake(gpio, on);
285 if (irq == IRQ_RTCAlrm) {
301 void __init pxa25x_init_irq(void)
303 pxa_init_irq(32, pxa25x_set_wake);
304 pxa_init_gpio(85, pxa25x_set_wake);
307 static struct platform_device *pxa25x_devices[] __initdata = {
321 static struct sys_device pxa25x_sysdev[] = {
323 .cls = &pxa_irq_sysclass,
325 .cls = &pxa2xx_mfp_sysclass,
327 .cls = &pxa_gpio_sysclass,
331 static int __init pxa25x_init(void)
335 if (cpu_is_pxa25x()) {
339 clks_register(pxa25x_clks, ARRAY_SIZE(pxa25x_clks));
341 if ((ret = pxa_init_dma(16)))
346 for (i = 0; i < ARRAY_SIZE(pxa25x_sysdev); i++) {
347 ret = sysdev_register(&pxa25x_sysdev[i]);
349 pr_err("failed to register sysdev[%d]\n", i);
352 ret = platform_add_devices(pxa25x_devices,
353 ARRAY_SIZE(pxa25x_devices));
358 /* Only add HWUART for PXA255/26x; PXA210/250 do not have it. */
359 if (cpu_is_pxa255() || cpu_is_pxa26x()) {
360 clks_register(&pxa25x_hwuart_clk, 1);
361 ret = platform_device_register(&pxa_device_hwuart);
367 postcore_initcall(pxa25x_init);