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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/mach-pxa/pxa27x.c
downloadlinux-stericsson-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/arm/mach-pxa/pxa27x.c')
-rw-r--r--arch/arm/mach-pxa/pxa27x.c163
1 files changed, 163 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c
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+/*
+ * 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);