ARM: pxa: Access SMEMC via virtual addresses

This is important because on PXA3xx, the physical mapping of SMEMC registers
differs from the one on PXA2xx. In order to get PCMCIA working on both PXA2xx
and PXA320, the PCMCIA driver was adjusted accordingly as well.

Also, various places in the kernel had to be patched to use
__raw_read/__raw_write.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

arch/arm/mach-pxa/cm-x2xx.c

@@ -24,6 +24,7 @@
 #include <mach/pxa2xx-regs.h>
 #include <mach/audio.h>
 #include <mach/pxafb.h>
+#include <mach/smemc.h>
 
 #include <asm/hardware/it8152.h>
 
@@ -392,9 +393,9 @@ static int cmx2xx_suspend(struct sys_device *dev, pm_message_t state)
 	cmx2xx_pci_suspend();
 
 	/* save MSC registers */
-	sleep_save_msc[0] = MSC0;
-	sleep_save_msc[1] = MSC1;
-	sleep_save_msc[2] = MSC2;
+	sleep_save_msc[0] = __raw_readl(MSC0);
+	sleep_save_msc[1] = __raw_readl(MSC1);
+	sleep_save_msc[2] = __raw_readl(MSC2);
 
 	/* setup power saving mode registers */
 	PCFR = 0x0;
@@ -416,9 +417,9 @@ static int cmx2xx_resume(struct sys_device *dev)
 	cmx2xx_pci_resume();
 
 	/* restore MSC registers */
-	MSC0 = sleep_save_msc[0];
-	MSC1 = sleep_save_msc[1];
-	MSC2 = sleep_save_msc[2];
+	__raw_writel(sleep_save_msc[0], MSC0);
+	__raw_writel(sleep_save_msc[1], MSC1);
+	__raw_writel(sleep_save_msc[2], MSC2);
 
 	return 0;
 }

arch/arm/mach-pxa/cpufreq-pxa2xx.c

@@ -38,8 +38,10 @@
 #include <linux/cpufreq.h>
 #include <linux/err.h>
 #include <linux/regulator/consumer.h>
+#include <linux/io.h>
 
 #include <mach/pxa2xx-regs.h>
+#include <mach/smemc.h>
 
 #ifdef DEBUG
 static unsigned int freq_debug;
@@ -242,7 +244,7 @@ static void pxa27x_guess_max_freq(void)
 
 static void init_sdram_rows(void)
 {
-	uint32_t mdcnfg = MDCNFG;
+	uint32_t mdcnfg = __raw_readl(MDCNFG);
 	unsigned int drac2 = 0, drac0 = 0;
 
 	if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
@@ -331,8 +333,8 @@ static int pxa_set_target(struct cpufreq_policy *policy,
 	 * we need to preset the smaller DRI before the change.	 If we're
 	 * speeding up we need to set the larger DRI value after the change.
 	 */
-	preset_mdrefr = postset_mdrefr = MDREFR;
-	if ((MDREFR & MDREFR_DRI_MASK) > mdrefr_dri(new_freq_mem)) {
+	preset_mdrefr = postset_mdrefr = __raw_readl(MDREFR);
+	if ((preset_mdrefr & MDREFR_DRI_MASK) > mdrefr_dri(new_freq_mem)) {
 		preset_mdrefr = (preset_mdrefr & ~MDREFR_DRI_MASK);
 		preset_mdrefr |= mdrefr_dri(new_freq_mem);
 	}
@@ -370,7 +372,7 @@ static int pxa_set_target(struct cpufreq_policy *policy,
 3:		nop							\n\
 	  "
 		     : "=&r" (unused)
-		     : "r" (&MDREFR), "r" (cclkcfg),
+		     : "r" (MDREFR), "r" (cclkcfg),
 		       "r" (preset_mdrefr), "r" (postset_mdrefr)
 		     : "r4", "r5");
 	local_irq_restore(flags);

arch/arm/mach-pxa/csb726.c

@@ -27,6 +27,7 @@
 #include <mach/ohci.h>
 #include <mach/pxa2xx-regs.h>
 #include <mach/audio.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 #include "devices.h"
@@ -255,9 +256,9 @@ static struct platform_device *devices[] __initdata = {
 static void __init csb726_init(void)
 {
 	pxa2xx_mfp_config(ARRAY_AND_SIZE(csb726_pin_config));
-/*	MSC1 = 0x7ffc3ffc; *//* LAN9215/EXP_CS */
-/*	MSC2 = 0x06697ff4; *//* none/SM501 */
-	MSC2 = (MSC2 & ~0xffff) | 0x7ff4; /* SM501 */
+/*	__raw_writel(0x7ffc3ffc, MSC1); *//* LAN9215/EXP_CS */
+/*	__raw_writel(0x06697ff4, MSC2); *//* none/SM501 */
+	__raw_writel((__raw_readl(MSC2) & ~0xffff) | 0x7ff4, MSC2); /* SM501 */
 
 	pxa_set_ffuart_info(NULL);
 	pxa_set_btuart_info(NULL);

arch/arm/mach-pxa/generic.c

@@ -28,6 +28,7 @@
 
 #include <mach/reset.h>
 #include <mach/gpio.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 

arch/arm/mach-pxa/h5000.c

@@ -32,6 +32,7 @@
 #include <mach/pxa25x.h>
 #include <mach/h5000.h>
 #include <mach/udc.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 
@@ -172,11 +173,11 @@ static unsigned long h5000_pin_config[] __initdata = {
 
 static void fix_msc(void)
 {
-	MSC0 = 0x129c24f2;
-	MSC1 = 0x7ff424fa;
-	MSC2 = 0x7ff47ff4;
+	__raw_writel(0x129c24f2, MSC0);
+	__raw_writel(0x7ff424fa, MSC1);
+	__raw_writel(0x7ff47ff4, MSC2);
 
-	MDREFR |= 0x02080000;
+	__raw_writel(__raw_readl(MDREFR) | 0x02080000, MDREFR);
 }
 
 /*

arch/arm/mach-pxa/include/mach/pxa2xx-regs.h

@@ -16,61 +16,6 @@
 
 #include <mach/hardware.h>
 
-/*
- * Memory controller
- */
-
-#define MDCNFG		__REG(0x48000000)  /* SDRAM Configuration Register 0 */
-#define MDREFR		__REG(0x48000004)  /* SDRAM Refresh Control Register */
-#define MSC0		__REG(0x48000008)  /* Static Memory Control Register 0 */
-#define MSC1		__REG(0x4800000C)  /* Static Memory Control Register 1 */
-#define MSC2		__REG(0x48000010)  /* Static Memory Control Register 2 */
-#define MECR		__REG(0x48000014)  /* Expansion Memory (PCMCIA/Compact Flash) Bus Configuration */
-#define SXLCR		__REG(0x48000018)  /* LCR value to be written to SDRAM-Timing Synchronous Flash */
-#define SXCNFG		__REG(0x4800001C)  /* Synchronous Static Memory Control Register */
-#define SXMRS		__REG(0x48000024)  /* MRS value to be written to Synchronous Flash or SMROM */
-#define MCMEM0		__REG(0x48000028)  /* Card interface Common Memory Space Socket 0 Timing */
-#define MCMEM1		__REG(0x4800002C)  /* Card interface Common Memory Space Socket 1 Timing */
-#define MCATT0		__REG(0x48000030)  /* Card interface Attribute Space Socket 0 Timing Configuration */
-#define MCATT1		__REG(0x48000034)  /* Card interface Attribute Space Socket 1 Timing Configuration */
-#define MCIO0		__REG(0x48000038)  /* Card interface I/O Space Socket 0 Timing Configuration */
-#define MCIO1		__REG(0x4800003C)  /* Card interface I/O Space Socket 1 Timing Configuration */
-#define MDMRS		__REG(0x48000040)  /* MRS value to be written to SDRAM */
-#define BOOT_DEF	__REG(0x48000044)  /* Read-Only Boot-Time Register. Contains BOOT_SEL and PKG_SEL */
-
-/*
- * More handy macros for PCMCIA
- *
- * Arg is socket number
- */
-#define MCMEM(s)	__REG2(0x48000028, (s)<<2 )  /* Card interface Common Memory Space Socket s Timing */
-#define MCATT(s)	__REG2(0x48000030, (s)<<2 )  /* Card interface Attribute Space Socket s Timing Configuration */
-#define MCIO(s)		__REG2(0x48000038, (s)<<2 )  /* Card interface I/O Space Socket s Timing Configuration */
-
-/* MECR register defines */
-#define MECR_NOS	(1 << 0)	/* Number Of Sockets: 0 -> 1 sock, 1 -> 2 sock */
-#define MECR_CIT	(1 << 1)	/* Card Is There: 0 -> no card, 1 -> card inserted */
-
-#define MDCNFG_DE0	(1 << 0)	/* SDRAM Bank 0 Enable */
-#define MDCNFG_DE1	(1 << 1)	/* SDRAM Bank 1 Enable */
-#define MDCNFG_DE2	(1 << 16)	/* SDRAM Bank 2 Enable */
-#define MDCNFG_DE3	(1 << 17)	/* SDRAM Bank 3 Enable */
-
-#define MDREFR_K0DB4	(1 << 29)	/* SDCLK0 Divide by 4 Control/Status */
-#define MDREFR_K2FREE	(1 << 25)	/* SDRAM Free-Running Control */
-#define MDREFR_K1FREE	(1 << 24)	/* SDRAM Free-Running Control */
-#define MDREFR_K0FREE	(1 << 23)	/* SDRAM Free-Running Control */
-#define MDREFR_SLFRSH	(1 << 22)	/* SDRAM Self-Refresh Control/Status */
-#define MDREFR_APD	(1 << 20)	/* SDRAM/SSRAM Auto-Power-Down Enable */
-#define MDREFR_K2DB2	(1 << 19)	/* SDCLK2 Divide by 2 Control/Status */
-#define MDREFR_K2RUN	(1 << 18)	/* SDCLK2 Run Control/Status */
-#define MDREFR_K1DB2	(1 << 17)	/* SDCLK1 Divide by 2 Control/Status */
-#define MDREFR_K1RUN	(1 << 16)	/* SDCLK1 Run Control/Status */
-#define MDREFR_E1PIN	(1 << 15)	/* SDCKE1 Level Control/Status */
-#define MDREFR_K0DB2	(1 << 14)	/* SDCLK0 Divide by 2 Control/Status */
-#define MDREFR_K0RUN	(1 << 13)	/* SDCLK0 Run Control/Status */
-#define MDREFR_E0PIN	(1 << 12)	/* SDCKE0 Level Control/Status */
-
 /*
  * Power Manager
  */

arch/arm/mach-pxa/include/mach/smemc.h

@@ -0,0 +1,74 @@
+/*
+ * Static memory controller register definitions for PXA CPUs
+ *
+ * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
+ *
+ * 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.
+ */
+
+#ifndef __SMEMC_REGS_H
+#define __SMEMC_REGS_H
+
+#define PXA2XX_SMEMC_BASE	0x48000000
+#define PXA3XX_SMEMC_BASE	0x4a000000
+#define SMEMC_VIRT		0xf6000000
+
+#define MDCNFG		(SMEMC_VIRT + 0x00)  /* SDRAM Configuration Register 0 */
+#define MDREFR		(SMEMC_VIRT + 0x04)  /* SDRAM Refresh Control Register */
+#define MSC0		(SMEMC_VIRT + 0x08)  /* Static Memory Control Register 0 */
+#define MSC1		(SMEMC_VIRT + 0x0C)  /* Static Memory Control Register 1 */
+#define MSC2		(SMEMC_VIRT + 0x10)  /* Static Memory Control Register 2 */
+#define MECR		(SMEMC_VIRT + 0x14)  /* Expansion Memory (PCMCIA/Compact Flash) Bus Configuration */
+#define SXLCR		(SMEMC_VIRT + 0x18)  /* LCR value to be written to SDRAM-Timing Synchronous Flash */
+#define SXCNFG		(SMEMC_VIRT + 0x1C)  /* Synchronous Static Memory Control Register */
+#define SXMRS		(SMEMC_VIRT + 0x24)  /* MRS value to be written to Synchronous Flash or SMROM */
+#define MCMEM0		(SMEMC_VIRT + 0x28)  /* Card interface Common Memory Space Socket 0 Timing */
+#define MCMEM1		(SMEMC_VIRT + 0x2C)  /* Card interface Common Memory Space Socket 1 Timing */
+#define MCATT0		(SMEMC_VIRT + 0x30)  /* Card interface Attribute Space Socket 0 Timing Configuration */
+#define MCATT1		(SMEMC_VIRT + 0x34)  /* Card interface Attribute Space Socket 1 Timing Configuration */
+#define MCIO0		(SMEMC_VIRT + 0x38)  /* Card interface I/O Space Socket 0 Timing Configuration */
+#define MCIO1		(SMEMC_VIRT + 0x3C)  /* Card interface I/O Space Socket 1 Timing Configuration */
+#define MDMRS		(SMEMC_VIRT + 0x40)  /* MRS value to be written to SDRAM */
+#define BOOT_DEF	(SMEMC_VIRT + 0x44)  /* Read-Only Boot-Time Register. Contains BOOT_SEL and PKG_SEL */
+#define MEMCLKCFG	(SMEMC_VIRT + 0x68)  /* Clock Configuration */
+#define CSADRCFG0	(SMEMC_VIRT + 0x80)  /* Address Configuration Register for CS0 */
+#define CSADRCFG1	(SMEMC_VIRT + 0x84)  /* Address Configuration Register for CS1 */
+#define CSADRCFG2	(SMEMC_VIRT + 0x88)  /* Address Configuration Register for CS2 */
+#define CSADRCFG3	(SMEMC_VIRT + 0x8C)  /* Address Configuration Register for CS3 */
+
+/*
+ * More handy macros for PCMCIA
+ *
+ * Arg is socket number
+ */
+#define MCMEM(s)	(SMEMC_VIRT + 0x28 + ((s)<<2))  /* Card interface Common Memory Space Socket s Timing */
+#define MCATT(s)	(SMEMC_VIRT + 0x30 + ((s)<<2))  /* Card interface Attribute Space Socket s Timing Configuration */
+#define MCIO(s)		(SMEMC_VIRT + 0x38 + ((s)<<2))  /* Card interface I/O Space Socket s Timing Configuration */
+
+/* MECR register defines */
+#define MECR_NOS	(1 << 0)	/* Number Of Sockets: 0 -> 1 sock, 1 -> 2 sock */
+#define MECR_CIT	(1 << 1)	/* Card Is There: 0 -> no card, 1 -> card inserted */
+
+#define MDCNFG_DE0	(1 << 0)	/* SDRAM Bank 0 Enable */
+#define MDCNFG_DE1	(1 << 1)	/* SDRAM Bank 1 Enable */
+#define MDCNFG_DE2	(1 << 16)	/* SDRAM Bank 2 Enable */
+#define MDCNFG_DE3	(1 << 17)	/* SDRAM Bank 3 Enable */
+
+#define MDREFR_K0DB4	(1 << 29)	/* SDCLK0 Divide by 4 Control/Status */
+#define MDREFR_K2FREE	(1 << 25)	/* SDRAM Free-Running Control */
+#define MDREFR_K1FREE	(1 << 24)	/* SDRAM Free-Running Control */
+#define MDREFR_K0FREE	(1 << 23)	/* SDRAM Free-Running Control */
+#define MDREFR_SLFRSH	(1 << 22)	/* SDRAM Self-Refresh Control/Status */
+#define MDREFR_APD	(1 << 20)	/* SDRAM/SSRAM Auto-Power-Down Enable */
+#define MDREFR_K2DB2	(1 << 19)	/* SDCLK2 Divide by 2 Control/Status */
+#define MDREFR_K2RUN	(1 << 18)	/* SDCLK2 Run Control/Status */
+#define MDREFR_K1DB2	(1 << 17)	/* SDCLK1 Divide by 2 Control/Status */
+#define MDREFR_K1RUN	(1 << 16)	/* SDCLK1 Run Control/Status */
+#define MDREFR_E1PIN	(1 << 15)	/* SDCKE1 Level Control/Status */
+#define MDREFR_K0DB2	(1 << 14)	/* SDCLK0 Divide by 2 Control/Status */
+#define MDREFR_K0RUN	(1 << 13)	/* SDCLK0 Run Control/Status */
+#define MDREFR_E0PIN	(1 << 12)	/* SDCKE0 Level Control/Status */
+
+#endif

arch/arm/mach-pxa/lpd270.c

@@ -46,6 +46,7 @@
 #include <mach/mmc.h>
 #include <mach/irda.h>
 #include <mach/ohci.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 #include "devices.h"
@@ -463,7 +464,7 @@ static void __init lpd270_init(void)
 	pxa_set_btuart_info(NULL);
 	pxa_set_stuart_info(NULL);
 
-	lpd270_flash_data[0].width = (BOOT_DEF & 1) ? 2 : 4;
+	lpd270_flash_data[0].width = (__raw_readl(BOOT_DEF) & 1) ? 2 : 4;
 	lpd270_flash_data[1].width = 4;
 
 	/*

arch/arm/mach-pxa/lubbock.c

@@ -50,6 +50,7 @@
 #include <mach/pxafb.h>
 #include <mach/mmc.h>
 #include <mach/pm.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 #include "clock.h"
@@ -525,7 +526,7 @@ static void __init lubbock_init(void)
 	pxa_set_ac97_info(NULL);
 
 	lubbock_flash_data[0].width = lubbock_flash_data[1].width =
-		(BOOT_DEF & 1) ? 2 : 4;
+		(__raw_readl(BOOT_DEF) & 1) ? 2 : 4;
 	/* Compensate for the nROMBT switch which swaps the flash banks */
 	printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
 	       flashboot?"Flash":"ROM", flashboot);

arch/arm/mach-pxa/mainstone.c

@@ -51,6 +51,7 @@
 #include <mach/irda.h>
 #include <mach/ohci.h>
 #include <plat/pxa27x_keypad.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 #include "devices.h"
@@ -565,7 +566,7 @@ static void __init mainstone_init(void)
 	pxa_set_btuart_info(NULL);
 	pxa_set_stuart_info(NULL);
 
-	mst_flash_data[0].width = (BOOT_DEF & 1) ? 2 : 4;
+	mst_flash_data[0].width = (__raw_readl(BOOT_DEF) & 1) ? 2 : 4;
 	mst_flash_data[1].width = 4;
 
 	/* Compensate for SW7 which swaps the flash banks */

arch/arm/mach-pxa/pxa25x.c

@@ -31,6 +31,7 @@
 #include <mach/reset.h>
 #include <mach/pm.h>
 #include <mach/dma.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 #include "devices.h"
@@ -323,8 +324,8 @@ void __init pxa26x_init_irq(void)
 
 static struct map_desc pxa25x_io_desc[] __initdata = {
 	{	/* Mem Ctl */
-		.virtual	=  0xf6000000,
-		.pfn		= __phys_to_pfn(0x48000000),
+		.virtual	= SMEMC_VIRT,
+		.pfn		= __phys_to_pfn(PXA2XX_SMEMC_BASE),
 		.length		= 0x00200000,
 		.type		= MT_DEVICE
 	},

arch/arm/mach-pxa/pxa27x.c

@@ -17,6 +17,7 @@
 #include <linux/suspend.h>
 #include <linux/platform_device.h>
 #include <linux/sysdev.h>
+#include <linux/io.h>
 
 #include <asm/mach/map.h>
 #include <mach/hardware.h>
@@ -28,6 +29,8 @@
 #include <mach/ohci.h>
 #include <mach/pm.h>
 #include <mach/dma.h>
+#include <mach/smemc.h>
+
 #include <plat/i2c.h>
 
 #include "generic.h"
@@ -255,7 +258,7 @@ enum {
 
 void pxa27x_cpu_pm_save(unsigned long *sleep_save)
 {
-	SAVE(MDREFR);
+	sleep_save[SLEEP_SAVE_MDREFR] = __raw_readl(MDREFR);
 	SAVE(PCFR);
 
 	SAVE(CKEN);
@@ -264,7 +267,7 @@ void pxa27x_cpu_pm_save(unsigned long *sleep_save)
 
 void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
 {
-	RESTORE(MDREFR);
+	__raw_writel(sleep_save[SLEEP_SAVE_MDREFR], MDREFR);
 	RESTORE(PCFR);
 
 	PSSR = PSSR_RDH | PSSR_PH;
@@ -373,8 +376,8 @@ void __init pxa27x_init_irq(void)
 
 static struct map_desc pxa27x_io_desc[] __initdata = {
 	{	/* Mem Ctl */
-		.virtual	=  0xf6000000,
-		.pfn		= __phys_to_pfn(0x48000000),
+		.virtual	= SMEMC_VIRT,
+		.pfn		= __phys_to_pfn(PXA2XX_SMEMC_BASE),
 		.length		= 0x00200000,
 		.type		= MT_DEVICE
 	}, {	/* IMem ctl */

arch/arm/mach-pxa/pxa3xx.c

@@ -31,6 +31,7 @@
 #include <mach/pm.h>
 #include <mach/dma.h>
 #include <mach/regs-intc.h>
+#include <mach/smemc.h>
 #include <plat/i2c.h>
 
 #include "generic.h"
@@ -583,8 +584,8 @@ void __init pxa3xx_init_irq(void)
 
 static struct map_desc pxa3xx_io_desc[] __initdata = {
 	{	/* Mem Ctl */
-		.virtual	=  0xf6000000,
-		.pfn		= __phys_to_pfn(0x4a000000),
+		.virtual	= SMEMC_VIRT,
+		.pfn		= __phys_to_pfn(PXA3XX_SMEMC_BASE),
 		.length		= 0x00200000,
 		.type		= MT_DEVICE
 	}