diff options
Diffstat (limited to 'arch/arm/mach-pxa/pxa27x.c')
| -rw-r--r-- | arch/arm/mach-pxa/pxa27x.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c new file mode 100644 index 000000000000..7e863afefb53 --- /dev/null +++ b/arch/arm/mach-pxa/pxa27x.c @@ -0,0 +1,163 @@ +/* + * linux/arch/arm/mach-pxa/pxa27x.c + * + * Author: Nicolas Pitre + * Created: Nov 05, 2002 + * Copyright: MontaVista Software Inc. + * + * Code specific to PXA27x aka Bulverde. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/config.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/pm.h> +#include <linux/device.h> + +#include <asm/hardware.h> +#include <asm/irq.h> +#include <asm/arch/pxa-regs.h> + +#include "generic.h" + +/* Crystal clock: 13MHz */ +#define BASE_CLK 13000000 + +/* + * Get the clock frequency as reflected by CCSR and the turbo flag. + * We assume these values have been applied via a fcs. + * If info is not 0 we also display the current settings. + */ +unsigned int get_clk_frequency_khz( int info) +{ + unsigned long ccsr, clkcfg; + unsigned int l, L, m, M, n2, N, S; + int cccr_a, t, ht, b; + + ccsr = CCSR; + cccr_a = CCCR & (1 << 25); + + /* Read clkcfg register: it has turbo, b, half-turbo (and f) */ + asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) ); + t = clkcfg & (1 << 1); + ht = clkcfg & (1 << 2); + b = clkcfg & (1 << 3); + + l = ccsr & 0x1f; + n2 = (ccsr>>7) & 0xf; + m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4; + + L = l * BASE_CLK; + N = (L * n2) / 2; + M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2)); + S = (b) ? L : (L/2); + + if (info) { + printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n", + L / 1000000, (L % 1000000) / 10000, l ); + printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n", + N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5, + (t) ? "" : "in" ); + printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n", + M / 1000000, (M % 1000000) / 10000, m ); + printk( KERN_INFO "System bus clock: %d.%02dMHz \n", + S / 1000000, (S % 1000000) / 10000 ); + } + + return (t) ? (N/1000) : (L/1000); +} + +/* + * Return the current mem clock frequency in units of 10kHz as + * reflected by CCCR[A], B, and L + */ +unsigned int get_memclk_frequency_10khz(void) +{ + unsigned long ccsr, clkcfg; + unsigned int l, L, m, M; + int cccr_a, b; + + ccsr = CCSR; + cccr_a = CCCR & (1 << 25); + + /* Read clkcfg register: it has turbo, b, half-turbo (and f) */ + asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) ); + b = clkcfg & (1 << 3); + + l = ccsr & 0x1f; + m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4; + + L = l * BASE_CLK; + M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2)); + + return (M / 10000); +} + +/* + * Return the current LCD clock frequency in units of 10kHz as + */ +unsigned int get_lcdclk_frequency_10khz(void) +{ + unsigned long ccsr; + unsigned int l, L, k, K; + + ccsr = CCSR; + + l = ccsr & 0x1f; + k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4; + + L = l * BASE_CLK; + K = L / k; + + return (K / 10000); +} + +EXPORT_SYMBOL(get_clk_frequency_khz); +EXPORT_SYMBOL(get_memclk_frequency_10khz); +EXPORT_SYMBOL(get_lcdclk_frequency_10khz); + + +/* + * device registration specific to PXA27x. + */ + +static u64 pxa27x_dmamask = 0xffffffffUL; + +static struct resource pxa27x_ohci_resources[] = { + [0] = { + .start = 0x4C000000, + .end = 0x4C00ff6f, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = IRQ_USBH1, + .end = IRQ_USBH1, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct platform_device ohci_device = { + .name = "pxa27x-ohci", + .id = -1, + .dev = { + .dma_mask = &pxa27x_dmamask, + .coherent_dma_mask = 0xffffffff, + }, + .num_resources = ARRAY_SIZE(pxa27x_ohci_resources), + .resource = pxa27x_ohci_resources, +}; + +static struct platform_device *devices[] __initdata = { + &ohci_device, +}; + +static int __init pxa27x_init(void) +{ + return platform_add_devices(devices, ARRAY_SIZE(devices)); +} + +subsys_initcall(pxa27x_init); |