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/config.h>
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
19 #include <linux/device.h>
21 #include <asm/hardware.h>
23 #include <asm/arch/pxa-regs.h>
27 /* Crystal clock: 13MHz */
28 #define BASE_CLK 13000000
31 * Get the clock frequency as reflected by CCSR and the turbo flag.
32 * We assume these values have been applied via a fcs.
33 * If info is not 0 we also display the current settings.
35 unsigned int get_clk_frequency_khz( int info)
37 unsigned long ccsr, clkcfg;
38 unsigned int l, L, m, M, n2, N, S;
42 cccr_a = CCCR & (1 << 25);
44 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
45 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
46 t = clkcfg & (1 << 1);
47 ht = clkcfg & (1 << 2);
48 b = clkcfg & (1 << 3);
52 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
56 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
60 printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
61 L / 1000000, (L % 1000000) / 10000, l );
62 printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
63 N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5,
65 printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n",
66 M / 1000000, (M % 1000000) / 10000, m );
67 printk( KERN_INFO "System bus clock: %d.%02dMHz \n",
68 S / 1000000, (S % 1000000) / 10000 );
71 return (t) ? (N/1000) : (L/1000);
75 * Return the current mem clock frequency in units of 10kHz as
76 * reflected by CCCR[A], B, and L
78 unsigned int get_memclk_frequency_10khz(void)
80 unsigned long ccsr, clkcfg;
81 unsigned int l, L, m, M;
85 cccr_a = CCCR & (1 << 25);
87 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
88 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
89 b = clkcfg & (1 << 3);
92 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
95 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
101 * Return the current LCD clock frequency in units of 10kHz as
103 unsigned int get_lcdclk_frequency_10khz(void)
106 unsigned int l, L, k, K;
111 k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4;
119 EXPORT_SYMBOL(get_clk_frequency_khz);
120 EXPORT_SYMBOL(get_memclk_frequency_10khz);
121 EXPORT_SYMBOL(get_lcdclk_frequency_10khz);
125 int pxa_cpu_pm_prepare(suspend_state_t state)
129 case PM_SUSPEND_STANDBY:
136 void pxa_cpu_pm_enter(suspend_state_t state)
138 extern void pxa_cpu_standby(void);
139 extern void pxa_cpu_suspend(unsigned int);
140 extern void pxa_cpu_resume(void);
142 if (state == PM_SUSPEND_STANDBY)
143 CKEN = CKEN22_MEMC | CKEN9_OSTIMER | CKEN16_LCD |CKEN0_PWM0;
145 CKEN = CKEN22_MEMC | CKEN9_OSTIMER;
147 /* ensure voltage-change sequencer not initiated, which hangs */
150 /* Clear edge-detect status register. */
154 case PM_SUSPEND_STANDBY:
158 /* set resume return address */
159 PSPR = virt_to_phys(pxa_cpu_resume);
160 pxa_cpu_suspend(PWRMODE_SLEEP);
168 * device registration specific to PXA27x.
171 static u64 pxa27x_dmamask = 0xffffffffUL;
173 static struct resource pxa27x_ohci_resources[] = {
177 .flags = IORESOURCE_MEM,
182 .flags = IORESOURCE_IRQ,
186 static struct platform_device ohci_device = {
187 .name = "pxa27x-ohci",
190 .dma_mask = &pxa27x_dmamask,
191 .coherent_dma_mask = 0xffffffff,
193 .num_resources = ARRAY_SIZE(pxa27x_ohci_resources),
194 .resource = pxa27x_ohci_resources,
197 static struct platform_device *devices[] __initdata = {
201 static int __init pxa27x_init(void)
203 return platform_add_devices(devices, ARRAY_SIZE(devices));
206 subsys_initcall(pxa27x_init);