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>
18 #include <linux/platform_device.h>
20 #include <asm/hardware.h>
22 #include <asm/arch/irqs.h>
23 #include <asm/arch/pxa-regs.h>
24 #include <asm/arch/ohci.h>
25 #include <asm/arch/pm.h>
26 #include <asm/arch/dma.h>
30 /* Crystal clock: 13MHz */
31 #define BASE_CLK 13000000
34 * Get the clock frequency as reflected by CCSR and the turbo flag.
35 * We assume these values have been applied via a fcs.
36 * If info is not 0 we also display the current settings.
38 unsigned int get_clk_frequency_khz( int info)
40 unsigned long ccsr, clkcfg;
41 unsigned int l, L, m, M, n2, N, S;
45 cccr_a = CCCR & (1 << 25);
47 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
48 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
49 t = clkcfg & (1 << 0);
50 ht = clkcfg & (1 << 2);
51 b = clkcfg & (1 << 3);
55 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
59 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
63 printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
64 L / 1000000, (L % 1000000) / 10000, l );
65 printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
66 N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5,
68 printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n",
69 M / 1000000, (M % 1000000) / 10000, m );
70 printk( KERN_INFO "System bus clock: %d.%02dMHz \n",
71 S / 1000000, (S % 1000000) / 10000 );
74 return (t) ? (N/1000) : (L/1000);
78 * Return the current mem clock frequency in units of 10kHz as
79 * reflected by CCCR[A], B, and L
81 unsigned int get_memclk_frequency_10khz(void)
83 unsigned long ccsr, clkcfg;
84 unsigned int l, L, m, M;
88 cccr_a = CCCR & (1 << 25);
90 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
91 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
92 b = clkcfg & (1 << 3);
95 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
98 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
104 * Return the current LCD clock frequency in units of 10kHz as
106 unsigned int get_lcdclk_frequency_10khz(void)
109 unsigned int l, L, k, K;
114 k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4;
122 EXPORT_SYMBOL(get_clk_frequency_khz);
123 EXPORT_SYMBOL(get_memclk_frequency_10khz);
124 EXPORT_SYMBOL(get_lcdclk_frequency_10khz);
128 void pxa_cpu_pm_enter(suspend_state_t state)
130 extern void pxa_cpu_standby(void);
131 extern void pxa_cpu_suspend(unsigned int);
132 extern void pxa_cpu_resume(void);
134 if (state == PM_SUSPEND_STANDBY)
135 CKEN = (1 << CKEN_MEMC) | (1 << CKEN_OSTIMER) | (1 << CKEN_LCD) | (1 << CKEN_PWM0);
137 CKEN = (1 << CKEN_MEMC) | (1 << CKEN_OSTIMER);
139 /* ensure voltage-change sequencer not initiated, which hangs */
142 /* Clear edge-detect status register. */
146 case PM_SUSPEND_STANDBY:
150 /* set resume return address */
151 PSPR = virt_to_phys(pxa_cpu_resume);
152 pxa_cpu_suspend(PWRMODE_SLEEP);
157 static int pxa27x_pm_valid(suspend_state_t state)
159 return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
162 static struct pm_ops pxa27x_pm_ops = {
163 .enter = pxa_pm_enter,
164 .valid = pxa27x_pm_valid,
169 * device registration specific to PXA27x.
172 static u64 pxa27x_dmamask = 0xffffffffUL;
174 static struct resource pxa27x_ohci_resources[] = {
178 .flags = IORESOURCE_MEM,
183 .flags = IORESOURCE_IRQ,
187 static struct platform_device pxaohci_device = {
188 .name = "pxa27x-ohci",
191 .dma_mask = &pxa27x_dmamask,
192 .coherent_dma_mask = 0xffffffff,
194 .num_resources = ARRAY_SIZE(pxa27x_ohci_resources),
195 .resource = pxa27x_ohci_resources,
198 void __init pxa_set_ohci_info(struct pxaohci_platform_data *info)
200 pxaohci_device.dev.platform_data = info;
203 static struct resource i2c_power_resources[] = {
207 .flags = IORESOURCE_MEM,
211 .flags = IORESOURCE_IRQ,
215 static struct platform_device pxai2c_power_device = {
216 .name = "pxa2xx-i2c",
218 .resource = i2c_power_resources,
219 .num_resources = ARRAY_SIZE(i2c_power_resources),
222 static struct platform_device *devices[] __initdata = {
230 &pxai2c_power_device,
237 void __init pxa27x_init_irq(void)
241 pxa_init_irq_gpio(128);
244 static int __init pxa27x_init(void)
247 if (cpu_is_pxa27x()) {
248 if ((ret = pxa_init_dma(32)))
251 pm_set_ops(&pxa27x_pm_ops);
253 ret = platform_add_devices(devices, ARRAY_SIZE(devices));
258 subsys_initcall(pxa27x_init);