davinci: add arch_ioremap() which uses existing static mappings

Add arch-specific ioremap() which uses any existing static mappings in
place of doing a new mapping.  From now on, drivers should always use
ioremap() instead of IO_ADDRESS().

In addition, remove the davinci_[read|write]* macros in favor of using
ioremap.
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

arch/arm/mach-davinci/board-evm.c

@@ -36,6 +36,9 @@
 #include <mach/common.h>
 #include <mach/i2c.h>
 
+#define DAVINCI_CFC_ATA_BASE		  0x01C66000
+#define DAVINCI_ASYNC_EMIF_DATA_CE0_BASE  0x02000000
+
 /* other misc. init functions */
 void __init davinci_psc_init(void);
 void __init davinci_irq_init(void);
@@ -422,7 +425,6 @@ static __init void davinci_evm_init(void)
 
 static __init void davinci_evm_irq_init(void)
 {
-	davinci_init_common_hw();
 	davinci_irq_init();
 }
 

arch/arm/mach-davinci/devices.c

@@ -22,6 +22,8 @@
 #include <mach/i2c.h>
 #include <mach/irqs.h>
 
+#define DAVINCI_I2C_BASE	     0x01C21000
+
 static struct resource i2c_resources[] = {
 	{
 		.start		= DAVINCI_I2C_BASE,

arch/arm/mach-davinci/id.c

@@ -15,7 +15,7 @@
 #include <linux/init.h>
 #include <linux/io.h>
 
-#define JTAG_ID_BASE		0x01c40028
+#define JTAG_ID_BASE		IO_ADDRESS(0x01c40028)
 
 static unsigned int davinci_revision;
 
@@ -58,7 +58,7 @@ static u16 __init davinci_get_part_no(void)
 {
 	u32 dev_id, part_no;
 
-	dev_id = davinci_readl(JTAG_ID_BASE);
+	dev_id = __raw_readl(JTAG_ID_BASE);
 
 	part_no = ((dev_id >> 12) & 0xffff);
 
@@ -72,7 +72,7 @@ static u8 __init davinci_get_variant(void)
 {
 	u32 variant;
 
-	variant = davinci_readl(JTAG_ID_BASE);
+	variant = __raw_readl(JTAG_ID_BASE);
 
 	variant = (variant >> 28) & 0xf;
 

arch/arm/mach-davinci/include/mach/gpio.h

@@ -15,9 +15,11 @@
 
 #include <linux/io.h>
 #include <asm-generic/gpio.h>
-#include <mach/hardware.h>
+
 #include <mach/irqs.h>
 
+#define DAVINCI_GPIO_BASE 0x01C67000
+
 /*
  * basic gpio routines
  *

arch/arm/mach-davinci/include/mach/hardware.h

 /*
- * Common hardware definitions
+ * Hardware definitions common to all DaVinci family processors
  *
- * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
+ * Author: Kevin Hilman, Deep Root Systems, LLC
  *
- * 2007 (c) MontaVista Software, Inc. This file is licensed under
+ * 2007 (c) Deep Root Systems, LLC. This file is licensed under
  * the terms of the GNU General Public License version 2. This program
  * is licensed "as is" without any warranty of any kind, whether express
  * or implied.
@@ -12,41 +12,16 @@
 #define __ASM_ARCH_HARDWARE_H
 
 /*
- * Base register addresses
+ * Before you add anything to ths file:
+ *
+ * This header is for defines common to ALL DaVinci family chips.
+ * Anything that is chip specific should go in <chipname>.h,
+ * and the chip/board init code should then explicitly include
+ * <chipname>.h
  */
-#define DAVINCI_DMA_3PCC_BASE			(0x01C00000)
-#define DAVINCI_DMA_3PTC0_BASE			(0x01C10000)
-#define DAVINCI_DMA_3PTC1_BASE			(0x01C10400)
-#define DAVINCI_I2C_BASE			(0x01C21000)
-#define DAVINCI_PWM0_BASE			(0x01C22000)
-#define DAVINCI_PWM1_BASE			(0x01C22400)
-#define DAVINCI_PWM2_BASE			(0x01C22800)
-#define DAVINCI_SYSTEM_MODULE_BASE		(0x01C40000)
-#define DAVINCI_PLL_CNTRL0_BASE			(0x01C40800)
-#define DAVINCI_PLL_CNTRL1_BASE			(0x01C40C00)
-#define DAVINCI_PWR_SLEEP_CNTRL_BASE		(0x01C41000)
-#define DAVINCI_SYSTEM_DFT_BASE			(0x01C42000)
-#define DAVINCI_IEEE1394_BASE			(0x01C60000)
-#define DAVINCI_USB_OTG_BASE			(0x01C64000)
-#define DAVINCI_CFC_ATA_BASE			(0x01C66000)
-#define DAVINCI_SPI_BASE			(0x01C66800)
-#define DAVINCI_GPIO_BASE			(0x01C67000)
-#define DAVINCI_UHPI_BASE			(0x01C67800)
-#define DAVINCI_VPSS_REGS_BASE			(0x01C70000)
-#define DAVINCI_EMAC_CNTRL_REGS_BASE		(0x01C80000)
-#define DAVINCI_EMAC_WRAPPER_CNTRL_REGS_BASE	(0x01C81000)
-#define DAVINCI_EMAC_WRAPPER_RAM_BASE		(0x01C82000)
-#define DAVINCI_MDIO_CNTRL_REGS_BASE		(0x01C84000)
-#define DAVINCI_IMCOP_BASE			(0x01CC0000)
-#define DAVINCI_ASYNC_EMIF_CNTRL_BASE		(0x01E00000)
-#define DAVINCI_VLYNQ_BASE			(0x01E01000)
-#define DAVINCI_MCBSP_BASE			(0x01E02000)
-#define DAVINCI_MMC_SD_BASE			(0x01E10000)
-#define DAVINCI_MS_BASE				(0x01E20000)
-#define DAVINCI_ASYNC_EMIF_DATA_CE0_BASE	(0x02000000)
-#define DAVINCI_ASYNC_EMIF_DATA_CE1_BASE	(0x04000000)
-#define DAVINCI_ASYNC_EMIF_DATA_CE2_BASE	(0x06000000)
-#define DAVINCI_ASYNC_EMIF_DATA_CE3_BASE	(0x08000000)
-#define DAVINCI_VLYNQ_REMOTE_BASE		(0x0C000000)
+#define DAVINCI_SYSTEM_MODULE_BASE        0x01C40000
+
+/* System control register offsets */
+#define DM64XX_VDD3P3V_PWDN	0x48
 
 #endif /* __ASM_ARCH_HARDWARE_H */

arch/arm/mach-davinci/include/mach/io.h

@@ -40,22 +40,12 @@
 #else
 #define IOMEM(x)                ((void __force __iomem *)(x))
 
-/*
- * Functions to access the DaVinci IO region
- *
- * NOTE: - Use davinci_read/write[bwl] for physical register addresses
- *	 - Use __raw_read/write[bwl]() for virtual register addresses
- *	 - Use IO_ADDRESS(phys_addr) to convert registers to virtual addresses
- *	 - DO NOT use hardcoded virtual addresses to allow changing the
- *	   IO address space again if needed
- */
-#define davinci_readb(a)	__raw_readb(IO_ADDRESS(a))
-#define davinci_readw(a)	__raw_readw(IO_ADDRESS(a))
-#define davinci_readl(a)	__raw_readl(IO_ADDRESS(a))
+#define __arch_ioremap(p, s, t)	davinci_ioremap(p, s, t)
+#define __arch_iounmap(v)	davinci_iounmap(v)
 
-#define davinci_writeb(v, a)	__raw_writeb(v, IO_ADDRESS(a))
-#define davinci_writew(v, a)	__raw_writew(v, IO_ADDRESS(a))
-#define davinci_writel(v, a)	__raw_writel(v, IO_ADDRESS(a))
+void __iomem *davinci_ioremap(unsigned long phys, size_t size,
+			      unsigned int type);
+void davinci_iounmap(volatile void __iomem *addr);
 
 #endif /* __ASSEMBLER__ */
 #endif /* __ASM_ARCH_IO_H */

arch/arm/mach-davinci/io.c

@@ -51,6 +51,26 @@ void __init davinci_map_common_io(void)
 	davinci_check_revision();
 }
 
-void __init davinci_init_common_hw(void)
+#define BETWEEN(p, st, sz)	((p) >= (st) && (p) < ((st) + (sz)))
+#define XLATE(p, pst, vst)	((void __iomem *)((p) - (pst) + (vst)))
+
+/*
+ * Intercept ioremap() requests for addresses in our fixed mapping regions.
+ */
+void __iomem *davinci_ioremap(unsigned long p, size_t size, unsigned int type)
+{
+	if (BETWEEN(p, IO_PHYS, IO_SIZE))
+		return XLATE(p, IO_PHYS, IO_VIRT);
+
+	return __arm_ioremap(p, size, type);
+}
+EXPORT_SYMBOL(davinci_ioremap);
+
+void davinci_iounmap(volatile void __iomem *addr)
 {
+	unsigned long virt = (unsigned long)addr;
+
+	if (virt >= VMALLOC_START && virt < VMALLOC_END)
+		__iounmap(addr);
 }
+EXPORT_SYMBOL(davinci_iounmap);

arch/arm/mach-davinci/irq.c

@@ -40,14 +40,16 @@
 #define IRQ_INTPRI0_REG_OFFSET	0x0030
 #define IRQ_INTPRI7_REG_OFFSET	0x004C
 
+#define INTC_BASE IO_ADDRESS(DAVINCI_ARM_INTC_BASE)
+
 static inline unsigned int davinci_irq_readl(int offset)
 {
-	return davinci_readl(DAVINCI_ARM_INTC_BASE + offset);
+	return __raw_readl(INTC_BASE + offset);
 }
 
 static inline void davinci_irq_writel(unsigned long value, int offset)
 {
-	davinci_writel(value, DAVINCI_ARM_INTC_BASE + offset);
+	__raw_writel(value, INTC_BASE + offset);
 }
 
 /* Disable interrupt */

arch/arm/mach-davinci/mux.c

@@ -23,6 +23,7 @@ static DEFINE_SPINLOCK(mux_lock);
 
 void davinci_mux_peripheral(unsigned int mux, unsigned int enable)
 {
+	void __iomem *base = IO_ADDRESS(DAVINCI_SYSTEM_MODULE_BASE);
 	u32 pinmux, muxreg = PINMUX0;
 
 	if (mux >= DAVINCI_MUX_LEVEL2) {
@@ -31,11 +32,11 @@ void davinci_mux_peripheral(unsigned int mux, unsigned int enable)
 	}
 
 	spin_lock(&mux_lock);
-	pinmux = davinci_readl(DAVINCI_SYSTEM_MODULE_BASE + muxreg);
+	pinmux = __raw_readl(base + muxreg);
 	if (enable)
 		pinmux |= (1 << mux);
 	else
 		pinmux &= ~(1 << mux);
-	davinci_writel(pinmux, DAVINCI_SYSTEM_MODULE_BASE + muxreg);
+	__raw_writel(pinmux, base + muxreg);
 	spin_unlock(&mux_lock);
 }

arch/arm/mach-davinci/psc.c

@@ -28,6 +28,8 @@
 #include <mach/psc.h>
 #include <mach/mux.h>
 
+#define DAVINCI_PWR_SLEEP_CNTRL_BASE 0x01C41000
+
 /* PSC register offsets */
 #define EPCPR		0x070
 #define PTCMD		0x120

arch/arm/mach-davinci/time.c

@@ -16,6 +16,9 @@
 #include <linux/clockchips.h>
 #include <linux/spinlock.h>
 #include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/device.h>
 
 #include <mach/hardware.h>
 #include <asm/system.h>
@@ -24,6 +27,8 @@
 #include <asm/mach/time.h>
 #include <asm/errno.h>
 #include <mach/io.h>
+#include <mach/cputype.h>
+#include "clock.h"
 
 static struct clock_event_device clockevent_davinci;
 
@@ -99,9 +104,9 @@ struct timer_s {
 	unsigned int id;
 	unsigned long period;
 	unsigned long opts;
-	unsigned long reg_base;
-	unsigned long tim_reg;
-	unsigned long prd_reg;
+	void __iomem *base;
+	unsigned long tim_off;
+	unsigned long prd_off;
 	unsigned long enamode_shift;
 	struct irqaction irqaction;
 };
@@ -114,15 +119,15 @@ static struct timer_s timers[];
 
 static int timer32_config(struct timer_s *t)
 {
-	u32 tcr = davinci_readl(t->reg_base + TCR);
+	u32 tcr = __raw_readl(t->base + TCR);
 
 	/* disable timer */
 	tcr &= ~(TCR_ENAMODE_MASK << t->enamode_shift);
-	davinci_writel(tcr, t->reg_base + TCR);
+	__raw_writel(tcr, t->base + TCR);
 
 	/* reset counter to zero, set new period */
-	davinci_writel(0, t->tim_reg);
-	davinci_writel(t->period, t->prd_reg);
+	__raw_writel(0, t->base + t->tim_off);
+	__raw_writel(t->period, t->base + t->prd_off);
 
 	/* Set enable mode */
 	if (t->opts & TIMER_OPTS_ONESHOT) {
@@ -131,13 +136,13 @@ static int timer32_config(struct timer_s *t)
 		tcr |= TCR_ENAMODE_PERIODIC << t->enamode_shift;
 	}
 
-	davinci_writel(tcr, t->reg_base + TCR);
+	__raw_writel(tcr, t->base + TCR);
 	return 0;
 }
 
 static inline u32 timer32_read(struct timer_s *t)
 {
-	return davinci_readl(t->tim_reg);
+	return __raw_readl(t->base + t->tim_off);
 }
 
 static irqreturn_t timer_interrupt(int irq, void *dev_id)
@@ -176,51 +181,54 @@ static struct timer_s timers[] = {
 
 static void __init timer_init(void)
 {
-	u32 bases[] = {DAVINCI_TIMER0_BASE, DAVINCI_TIMER1_BASE};
+	u32 phys_bases[] = {DAVINCI_TIMER0_BASE, DAVINCI_TIMER1_BASE};
 	int i;
 
 	/* Global init of each 64-bit timer as a whole */
 	for(i=0; i<2; i++) {
-		u32 tgcr, base = bases[i];
+		u32 tgcr;
+		void __iomem *base = IO_ADDRESS(phys_bases[i]);
 
 		/* Disabled, Internal clock source */
-		davinci_writel(0, base + TCR);
+		__raw_writel(0, base + TCR);
 
 		/* reset both timers, no pre-scaler for timer34 */
 		tgcr = 0;
-		davinci_writel(tgcr, base + TGCR);
+		__raw_writel(tgcr, base + TGCR);
 
 		/* Set both timers to unchained 32-bit */
 		tgcr = TGCR_TIMMODE_32BIT_UNCHAINED << TGCR_TIMMODE_SHIFT;
-		davinci_writel(tgcr, base + TGCR);
+		__raw_writel(tgcr, base + TGCR);
 
 		/* Unreset timers */
 		tgcr |= (TGCR_UNRESET << TGCR_TIM12RS_SHIFT) |
 			(TGCR_UNRESET << TGCR_TIM34RS_SHIFT);
-		davinci_writel(tgcr, base + TGCR);
+		__raw_writel(tgcr, base + TGCR);
 
 		/* Init both counters to zero */
-		davinci_writel(0, base + TIM12);
-		davinci_writel(0, base + TIM34);
+		__raw_writel(0, base + TIM12);
+		__raw_writel(0, base + TIM34);
 	}
 
 	/* Init of each timer as a 32-bit timer */
 	for (i=0; i< ARRAY_SIZE(timers); i++) {
 		struct timer_s *t = &timers[i];
+		u32 phys_base;
 
 		if (t->name) {
 			t->id = i;
-			t->reg_base = (IS_TIMER1(t->id) ?
+			phys_base = (IS_TIMER1(t->id) ?
 			       DAVINCI_TIMER1_BASE : DAVINCI_TIMER0_BASE);
+			t->base = IO_ADDRESS(phys_base);
 
 			if (IS_TIMER_BOT(t->id)) {
 				t->enamode_shift = 6;
-				t->tim_reg = t->reg_base + TIM12;
-				t->prd_reg = t->reg_base + PRD12;
+				t->tim_off = TIM12;
+				t->prd_off = PRD12;
 			} else {
 				t->enamode_shift = 22;
-				t->tim_reg = t->reg_base + TIM34;
-				t->prd_reg = t->reg_base + PRD34;
+				t->tim_off = TIM34;
+				t->prd_off = PRD34;
 			}
 
 			/* Register interrupt */
@@ -333,42 +341,43 @@ struct sys_timer davinci_timer = {
 
 /* reset board using watchdog timer */
 void davinci_watchdog_reset(void) {
-	u32 tgcr, wdtcr, base = DAVINCI_WDOG_BASE;
+	u32 tgcr, wdtcr;
+	void __iomem *base = IO_ADDRESS(DAVINCI_WDOG_BASE);
 
 	/* disable, internal clock source */
-	davinci_writel(0, base + TCR);
+	__raw_writel(0, base + TCR);
 
 	/* reset timer, set mode to 64-bit watchdog, and unreset */
 	tgcr = 0;
-	davinci_writel(tgcr, base + TCR);
+	__raw_writel(tgcr, base + TCR);
 	tgcr = TGCR_TIMMODE_64BIT_WDOG << TGCR_TIMMODE_SHIFT;
 	tgcr |= (TGCR_UNRESET << TGCR_TIM12RS_SHIFT) |
 		(TGCR_UNRESET << TGCR_TIM34RS_SHIFT);
-	davinci_writel(tgcr, base + TCR);
+	__raw_writel(tgcr, base + TCR);
 
 	/* clear counter and period regs */
-	davinci_writel(0, base + TIM12);
-	davinci_writel(0, base + TIM34);
-	davinci_writel(0, base + PRD12);
-	davinci_writel(0, base + PRD34);
+	__raw_writel(0, base + TIM12);
+	__raw_writel(0, base + TIM34);
+	__raw_writel(0, base + PRD12);
+	__raw_writel(0, base + PRD34);
 
 	/* enable */
-	wdtcr = davinci_readl(base + WDTCR);
+	wdtcr = __raw_readl(base + WDTCR);
 	wdtcr |= WDTCR_WDEN_ENABLE << WDTCR_WDEN_SHIFT;
-	davinci_writel(wdtcr, base + WDTCR);
+	__raw_writel(wdtcr, base + WDTCR);
 
 	/* put watchdog in pre-active state */
 	wdtcr = (WDTCR_WDKEY_SEQ0 << WDTCR_WDKEY_SHIFT) |
 		(WDTCR_WDEN_ENABLE << WDTCR_WDEN_SHIFT);
-	davinci_writel(wdtcr, base + WDTCR);
+	__raw_writel(wdtcr, base + WDTCR);
 
 	/* put watchdog in active state */
 	wdtcr = (WDTCR_WDKEY_SEQ1 << WDTCR_WDKEY_SHIFT) |
 		(WDTCR_WDEN_ENABLE << WDTCR_WDEN_SHIFT);
-	davinci_writel(wdtcr, base + WDTCR);
+	__raw_writel(wdtcr, base + WDTCR);
 
 	/* write an invalid value to the WDKEY field to trigger
 	 * a watchdog reset */
 	wdtcr = 0x00004000;
-	davinci_writel(wdtcr, base + WDTCR);
+	__raw_writel(wdtcr, base + WDTCR);
 }

arch/arm/mach-davinci/usb.c

@@ -14,6 +14,8 @@
 #include <mach/hardware.h>
 #include <mach/irqs.h>
 
+#define DAVINCI_USB_OTG_BASE 0x01C64000
+
 #if defined(CONFIG_USB_MUSB_HDRC) || defined(CONFIG_USB_MUSB_HDRC_MODULE)
 static struct musb_hdrc_eps_bits musb_eps[] = {
 	{ "ep1_tx", 8, },