[ARM PATCH] 1864/1: separate PXA25x and PXA27x specific code

Patch from Nicolas Pitre

arch/arm/mach-pxa/Kconfig

 
-menu "Intel PXA250/210 Implementations"
+menu "Intel PXA2xx Implementations"
 
 config ARCH_LUBBOCK
 	bool "Intel DBPXA250 Development Platform"
 	depends on ARCH_PXA
+	select PXA25x
 
 config ARCH_PXA_IDP
 	bool "Accelent Xscale IDP"
 	depends on ARCH_PXA
+	select PXA25x
 
 endmenu
 
+config PXA25x
+	bool
+	help
+	  Select code specific to PXA21x/25x/26x variants
+
+config PXA27x
+	bool
+	help
+	  Select code specific to PXA27x variants
+

arch/arm/mach-pxa/Makefile

@@ -4,6 +4,8 @@
 
 # Common support (must be linked before board specific support)
 obj-y += generic.o irq.o dma.o
+obj-$(CONFIG_PXA25x) += pxa25x.o
+obj-$(CONFIG_PXA27x) += pxa27x.o
 
 # Specific board support
 obj-$(CONFIG_ARCH_LUBBOCK) += lubbock.o

arch/arm/mach-pxa/generic.c

@@ -35,73 +35,6 @@
 
 #include "generic.h"
 
-/*
- * Various clock factors driven by the CCCR register.
- */
-
-/* Crystal Frequency to Memory Frequency Multiplier (L) */
-static unsigned char L_clk_mult[32] = { 0, 27, 32, 36, 40, 45, 0, };
-
-/* Memory Frequency to Run Mode Frequency Multiplier (M) */
-static unsigned char M_clk_mult[4] = { 0, 1, 2, 4 };
-
-/* Run Mode Frequency to Turbo Mode Frequency Multiplier (N) */
-/* Note: we store the value N * 2 here. */
-static unsigned char N2_clk_mult[8] = { 0, 0, 2, 3, 4, 0, 6, 0 };
-
-/* Crystal clock */
-#define BASE_CLK	3686400
-
-/*
- * Get the clock frequency as reflected by CCCR 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 cccr, turbo;
-	unsigned int l, L, m, M, n2, N;
-
-	cccr = CCCR;
-	asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (turbo) );
-
-	l  =  L_clk_mult[(cccr >> 0) & 0x1f];
-	m  =  M_clk_mult[(cccr >> 5) & 0x03];
-	n2 = N2_clk_mult[(cccr >> 7) & 0x07];
-
-	L = l * BASE_CLK;
-	M = m * L;
-	N = n2 * M / 2;
-
-	if(info)
-	{
-		L += 5000;
-		printk( KERN_INFO "Memory clock: %d.%02dMHz (*%d)\n",
-			L / 1000000, (L % 1000000) / 10000, l );
-		M += 5000;
-		printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
-			M / 1000000, (M % 1000000) / 10000, m );
-		N += 5000;
-		printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
-			N / 1000000, (N % 1000000) / 10000, n2 / 2, (n2 % 2) * 5,
-			(turbo & 1) ? "" : "in" );
-	}
-
-	return (turbo & 1) ? (N/1000) : (M/1000);
-}
-
-EXPORT_SYMBOL(get_clk_frequency_khz);
-
-/*
- * Return the current lclk requency in units of 10kHz
- */
-unsigned int get_lclk_frequency_10khz(void)
-{
-	return L_clk_mult[(CCCR >> 0) & 0x1f] * BASE_CLK / 10000;
-}
-
-EXPORT_SYMBOL(get_lclk_frequency_10khz);
-
 /*
  * Handy function to set GPIO alternate functions
  */

arch/arm/mach-pxa/pxa25x.c

+/*
+ *  linux/arch/arm/mach-pxa/pxa25x.c
+ *
+ *  Author:	Nicolas Pitre
+ *  Created:	Jun 15, 2001
+ *  Copyright:	MontaVista Software Inc.
+ *
+ * Code specific to PXA21x/25x/26x variants.
+ *
+ * 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.
+ *
+ * Since this file should be linked before any other machine specific file,
+ * the __initcall() here will be executed first.  This serves as default
+ * initialization stuff for PXA machines which can be overridden later if
+ * need be.
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/pm.h>
+
+#include <asm/hardware.h>
+
+#include "generic.h"
+
+/*
+ * Various clock factors driven by the CCCR register.
+ */
+
+/* Crystal Frequency to Memory Frequency Multiplier (L) */
+static unsigned char L_clk_mult[32] = { 0, 27, 32, 36, 40, 45, 0, };
+
+/* Memory Frequency to Run Mode Frequency Multiplier (M) */
+static unsigned char M_clk_mult[4] = { 0, 1, 2, 4 };
+
+/* Run Mode Frequency to Turbo Mode Frequency Multiplier (N) */
+/* Note: we store the value N * 2 here. */
+static unsigned char N2_clk_mult[8] = { 0, 0, 2, 3, 4, 0, 6, 0 };
+
+/* Crystal clock */
+#define BASE_CLK	3686400
+
+/*
+ * Get the clock frequency as reflected by CCCR 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 cccr, turbo;
+	unsigned int l, L, m, M, n2, N;
+
+	cccr = CCCR;
+	asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (turbo) );
+
+	l  =  L_clk_mult[(cccr >> 0) & 0x1f];
+	m  =  M_clk_mult[(cccr >> 5) & 0x03];
+	n2 = N2_clk_mult[(cccr >> 7) & 0x07];
+
+	L = l * BASE_CLK;
+	M = m * L;
+	N = n2 * M / 2;
+
+	if(info)
+	{
+		L += 5000;
+		printk( KERN_INFO "Memory clock: %d.%02dMHz (*%d)\n",
+			L / 1000000, (L % 1000000) / 10000, l );
+		M += 5000;
+		printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
+			M / 1000000, (M % 1000000) / 10000, m );
+		N += 5000;
+		printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
+			N / 1000000, (N % 1000000) / 10000, n2 / 2, (n2 % 2) * 5,
+			(turbo & 1) ? "" : "in" );
+	}
+
+	return (turbo & 1) ? (N/1000) : (M/1000);
+}
+
+EXPORT_SYMBOL(get_clk_frequency_khz);
+
+/*
+ * Return the current lclk requency in units of 10kHz
+ */
+unsigned int get_lclk_frequency_10khz(void)
+{
+	return L_clk_mult[(CCCR >> 0) & 0x1f] * BASE_CLK / 10000;
+}
+
+EXPORT_SYMBOL(get_lclk_frequency_10khz);
+

arch/arm/mach-pxa/pxa27x.c

+/*
+ *  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 <asm/hardware.h>
+
+#include "generic.h"
+
+/* Crystal clock : 13-MHZ*/
+#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.
+ *
+ * For more details, refer to Bulverde Manual, section 3.8.2.1
+ */
+unsigned int get_clk_frequency_khz( int info)
+{
+	unsigned long ccsr, turbo, b, ht;
+	unsigned int l, L, m, M, n2, N, S, cccra;
+
+	ccsr = CCSR;
+	cccra = CCCR & (0x1 << 25);
+
+	/* Read clkcfg register: it has turbo, b, half-turbo (and f) */
+	asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (turbo) );
+	b = (turbo & (0x1 << 3));
+	ht = (turbo & (0x1 << 2));
+
+	l  = ccsr & 0x1f;
+	n2 = (ccsr>>7) & 0xf;
+	if (l == 31) {
+		/* The calculation from the Yellow Book is incorrect:
+		   it says M=4 for L=21-30 (which is easy to calculate
+		   by subtracting 1 and then dividing by 10, but not
+		   with 31, so we'll do it manually */
+		m = 1 << 2;
+	} else {
+		m = 1 << ((l-1)/10);
+	}
+
+	L = l * BASE_CLK;
+	N = (n2 * L) / 2;
+	S = (b) ? L : (L/2);
+	if (cccra == 0)
+		M = L/m;
+	else
+		M = (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 "Memory clock: %d.%02dMHz (/%d)\n",
+			M / 1000000, (M % 1000000) / 10000, m );
+		printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
+			N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5,
+			(turbo & 1) ? "" : "in" );
+		printk( KERN_INFO "System bus clock: %d.%02dMHz \n",
+			S / 1000000, (S % 1000000) / 10000 );
+	}
+
+	return (turbo & 1) ? (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_lclk_frequency_10khz(void)
+{
+	unsigned long ccsr, clkcfg, b;
+	unsigned int l, L, m, M, cccra;
+
+	cccra = CCCR & (0x1 << 25);
+
+	/* Read clkcfg register to obtain b */
+	asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
+	b = (clkcfg & (0x1 << 3));
+
+	ccsr = CCSR;
+	l  =  ccsr & 0x1f;
+	if (l == 31) {
+		/* The calculation from the Yellow Book is incorrect:
+		   it says M=4 for L=21-30 (which is easy to calculate
+		   by subtracting 1 and then dividing by 10, but not
+		   with 31, so we'll do it manually */
+		m = 1 << 2;
+	} else {
+		m = 1 << ((l-1)/10);
+	}
+
+	L = l * BASE_CLK;
+	if (cccra == 0)
+		M = L/m;
+	else
+		M = (b) ? L : L/2;
+
+	return (M / 10000);
+}
+
+EXPORT_SYMBOL(get_clk_frequency_khz);
+EXPORT_SYMBOL(get_lclk_frequency_10khz);
+