2 * linux/arch/arm/mach-pxa/pxa27x.c
4 * Author: Nicolas Pitre
5 * Created: Nov 05, 2002
6 * Copyright: MontaVista Software Inc.
8 * Code specific to PXA27x aka Bulverde.
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 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/suspend.h>
18 #include <linux/platform_device.h>
19 #include <linux/sysdev.h>
21 #include <asm/hardware.h>
23 #include <asm/arch/irqs.h>
24 #include <asm/arch/pxa-regs.h>
25 #include <asm/arch/pxa2xx-regs.h>
26 #include <asm/arch/ohci.h>
27 #include <asm/arch/pm.h>
28 #include <asm/arch/dma.h>
29 #include <asm/arch/i2c.h>
35 /* Crystal clock: 13MHz */
36 #define BASE_CLK 13000000
39 * Get the clock frequency as reflected by CCSR and the turbo flag.
40 * We assume these values have been applied via a fcs.
41 * If info is not 0 we also display the current settings.
43 unsigned int pxa27x_get_clk_frequency_khz(int info)
45 unsigned long ccsr, clkcfg;
46 unsigned int l, L, m, M, n2, N, S;
50 cccr_a = CCCR & (1 << 25);
52 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
53 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
54 t = clkcfg & (1 << 0);
55 ht = clkcfg & (1 << 2);
56 b = clkcfg & (1 << 3);
60 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
64 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
68 printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
69 L / 1000000, (L % 1000000) / 10000, l );
70 printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
71 N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5,
73 printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n",
74 M / 1000000, (M % 1000000) / 10000, m );
75 printk( KERN_INFO "System bus clock: %d.%02dMHz \n",
76 S / 1000000, (S % 1000000) / 10000 );
79 return (t) ? (N/1000) : (L/1000);
83 * Return the current mem clock frequency in units of 10kHz as
84 * reflected by CCCR[A], B, and L
86 unsigned int pxa27x_get_memclk_frequency_10khz(void)
88 unsigned long ccsr, clkcfg;
89 unsigned int l, L, m, M;
93 cccr_a = CCCR & (1 << 25);
95 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
96 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
97 b = clkcfg & (1 << 3);
100 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
103 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
109 * Return the current LCD clock frequency in units of 10kHz as
111 static unsigned int pxa27x_get_lcdclk_frequency_10khz(void)
114 unsigned int l, L, k, K;
119 k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4;
127 static unsigned long clk_pxa27x_lcd_getrate(struct clk *clk)
129 return pxa27x_get_lcdclk_frequency_10khz() * 10000;
132 static const struct clkops clk_pxa27x_lcd_ops = {
133 .enable = clk_cken_enable,
134 .disable = clk_cken_disable,
135 .getrate = clk_pxa27x_lcd_getrate,
138 static struct clk pxa27x_clks[] = {
139 INIT_CK("LCDCLK", LCD, &clk_pxa27x_lcd_ops, &pxa_device_fb.dev),
140 INIT_CK("CAMCLK", CAMERA, &clk_pxa27x_lcd_ops, NULL),
142 INIT_CKEN("UARTCLK", FFUART, 14857000, 1, &pxa_device_ffuart.dev),
143 INIT_CKEN("UARTCLK", BTUART, 14857000, 1, &pxa_device_btuart.dev),
144 INIT_CKEN("UARTCLK", STUART, 14857000, 1, NULL),
146 INIT_CKEN("I2SCLK", I2S, 14682000, 0, &pxa_device_i2s.dev),
147 INIT_CKEN("I2CCLK", I2C, 32842000, 0, &pxa_device_i2c.dev),
148 INIT_CKEN("UDCCLK", USB, 48000000, 5, &pxa_device_udc.dev),
149 INIT_CKEN("MMCCLK", MMC, 19500000, 0, &pxa_device_mci.dev),
150 INIT_CKEN("FICPCLK", FICP, 48000000, 0, &pxa_device_ficp.dev),
152 INIT_CKEN("USBCLK", USBHOST, 48000000, 0, &pxa27x_device_ohci.dev),
153 INIT_CKEN("I2CCLK", PWRI2C, 13000000, 0, &pxa27x_device_i2c_power.dev),
154 INIT_CKEN("KBDCLK", KEYPAD, 32768, 0, NULL),
156 INIT_CKEN("SSPCLK", SSP1, 13000000, 0, &pxa27x_device_ssp1.dev),
157 INIT_CKEN("SSPCLK", SSP2, 13000000, 0, &pxa27x_device_ssp2.dev),
158 INIT_CKEN("SSPCLK", SSP3, 13000000, 0, &pxa27x_device_ssp3.dev),
160 INIT_CKEN("AC97CLK", AC97, 24576000, 0, NULL),
161 INIT_CKEN("AC97CONFCLK", AC97CONF, 24576000, 0, NULL),
164 INIT_CKEN("PWMCLK", PWM0, 13000000, 0, NULL),
165 INIT_CKEN("MSLCLK", MSL, 48000000, 0, NULL),
166 INIT_CKEN("USIMCLK", USIM, 48000000, 0, NULL),
167 INIT_CKEN("MSTKCLK", MEMSTK, 19500000, 0, NULL),
168 INIT_CKEN("IMCLK", IM, 0, 0, NULL),
169 INIT_CKEN("MEMCLK", MEMC, 0, 0, NULL),
175 #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
176 #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
179 * List of global PXA peripheral registers to preserve.
180 * More ones like CP and general purpose register values are preserved
181 * with the stack pointer in sleep.S.
183 enum { SLEEP_SAVE_START = 0,
185 SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2, SLEEP_SAVE_PGSR3,
187 SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
188 SLEEP_SAVE_GAFR1_L, SLEEP_SAVE_GAFR1_U,
189 SLEEP_SAVE_GAFR2_L, SLEEP_SAVE_GAFR2_U,
190 SLEEP_SAVE_GAFR3_L, SLEEP_SAVE_GAFR3_U,
197 SLEEP_SAVE_PWER, SLEEP_SAVE_PCFR, SLEEP_SAVE_PRER,
198 SLEEP_SAVE_PFER, SLEEP_SAVE_PKWR,
203 void pxa27x_cpu_pm_save(unsigned long *sleep_save)
205 SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2); SAVE(PGSR3);
207 SAVE(GAFR0_L); SAVE(GAFR0_U);
208 SAVE(GAFR1_L); SAVE(GAFR1_U);
209 SAVE(GAFR2_L); SAVE(GAFR2_U);
210 SAVE(GAFR3_L); SAVE(GAFR3_U);
213 SAVE(PWER); SAVE(PCFR); SAVE(PRER);
214 SAVE(PFER); SAVE(PKWR);
220 void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
222 /* ensure not to come back here if it wasn't intended */
225 /* restore registers */
226 RESTORE(GAFR0_L); RESTORE(GAFR0_U);
227 RESTORE(GAFR1_L); RESTORE(GAFR1_U);
228 RESTORE(GAFR2_L); RESTORE(GAFR2_U);
229 RESTORE(GAFR3_L); RESTORE(GAFR3_U);
230 RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2); RESTORE(PGSR3);
233 RESTORE(PWER); RESTORE(PCFR); RESTORE(PRER);
234 RESTORE(PFER); RESTORE(PKWR);
236 PSSR = PSSR_RDH | PSSR_PH;
243 void pxa27x_cpu_pm_enter(suspend_state_t state)
245 extern void pxa_cpu_standby(void);
247 /* ensure voltage-change sequencer not initiated, which hangs */
250 /* Clear edge-detect status register. */
254 case PM_SUSPEND_STANDBY:
258 /* set resume return address */
259 PSPR = virt_to_phys(pxa_cpu_resume);
260 pxa27x_cpu_suspend(PWRMODE_SLEEP);
265 static int pxa27x_cpu_pm_valid(suspend_state_t state)
267 return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
270 static struct pxa_cpu_pm_fns pxa27x_cpu_pm_fns = {
271 .save_size = SLEEP_SAVE_SIZE,
272 .save = pxa27x_cpu_pm_save,
273 .restore = pxa27x_cpu_pm_restore,
274 .valid = pxa27x_cpu_pm_valid,
275 .enter = pxa27x_cpu_pm_enter,
278 static void __init pxa27x_init_pm(void)
280 pxa_cpu_pm_fns = &pxa27x_cpu_pm_fns;
283 static inline void pxa27x_init_pm(void) {}
286 /* PXA27x: Various gpios can issue wakeup events. This logic only
287 * handles the simple cases, not the WEMUX2 and WEMUX3 options
289 #define PXA27x_GPIO_NOWAKE_MASK \
290 ((1 << 8) | (1 << 7) | (1 << 6) | (1 << 5) | (1 << 2))
291 #define WAKEMASK(gpio) \
293 ? ((1 << (gpio)) & ~PXA27x_GPIO_NOWAKE_MASK) \
294 : ((gpio == 35) ? (1 << 24) : 0))
296 static int pxa27x_set_wake(unsigned int irq, unsigned int on)
298 int gpio = IRQ_TO_GPIO(irq);
301 if ((gpio >= 0 && gpio <= 15) || (gpio == 35)) {
302 if (WAKEMASK(gpio) == 0)
305 mask = WAKEMASK(gpio);
308 if (GRER(gpio) | GPIO_bit(gpio))
313 if (GFER(gpio) | GPIO_bit(gpio))
341 void __init pxa27x_init_irq(void)
344 pxa_init_irq_gpio(128);
345 pxa_init_irq_set_wake(pxa27x_set_wake);
349 * device registration specific to PXA27x.
352 static struct resource i2c_power_resources[] = {
356 .flags = IORESOURCE_MEM,
360 .flags = IORESOURCE_IRQ,
364 struct platform_device pxa27x_device_i2c_power = {
365 .name = "pxa2xx-i2c",
367 .resource = i2c_power_resources,
368 .num_resources = ARRAY_SIZE(i2c_power_resources),
371 void __init pxa_set_i2c_power_info(struct i2c_pxa_platform_data *info)
373 pxa27x_device_i2c_power.dev.platform_data = info;
376 static struct platform_device *devices[] __initdata = {
383 &pxa27x_device_i2c_power,
389 static struct sys_device pxa27x_sysdev[] = {
391 .cls = &pxa_irq_sysclass,
393 .cls = &pxa_gpio_sysclass,
397 static int __init pxa27x_init(void)
401 if (cpu_is_pxa27x()) {
402 clks_register(pxa27x_clks, ARRAY_SIZE(pxa27x_clks));
404 if ((ret = pxa_init_dma(32)))
409 for (i = 0; i < ARRAY_SIZE(pxa27x_sysdev); i++) {
410 ret = sysdev_register(&pxa27x_sysdev[i]);
412 pr_err("failed to register sysdev[%d]\n", i);
415 ret = platform_add_devices(devices, ARRAY_SIZE(devices));
421 subsys_initcall(pxa27x_init);