i.MX27 CPU: Add basic i.MX27 CPU support

Add basic i.MX27 CPU support
Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>

arch/arm/mach-mx2/Kconfig

 comment "MX2 family CPU support"
 	depends on ARCH_MX2
 
+config MACH_MX27
+	bool "i.MX27 support"
+	depends on ARCH_MX2
+	help
+	  This enables support for Freescale's MX2 based i.MX27 processor.
+
 comment "MX2 Platforms"
 	depends on ARCH_MX2

arch/arm/mach-mx2/Makefile

@@ -5,3 +5,5 @@
 # Object file lists.
 
 obj-y	:=  system.o generic.o devices.o serial.o
+
+obj-$(CONFIG_MACH_MX27) += cpu_imx27.o

arch/arm/mach-mx2/cpu_imx27.c

+/*
+ * Copyright 2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+/*
+ * i.MX27 specific CPU detection code
+ */
+
+#include <linux/io.h>
+#include <linux/module.h>
+
+#include <asm/hardware.h>
+
+#include "crm_regs.h"
+
+static int cpu_silicon_rev = -1;
+static int cpu_partnumber;
+
+static void query_silicon_parameter(void)
+{
+	u32 val;
+	/*
+	 * now we have access to the IO registers. As we need
+	 * the silicon revision very early we read it here to
+	 * avoid any further hooks
+	*/
+	val = __raw_readl(IO_ADDRESS(SYSCTRL_BASE_ADDR) + SYS_CHIP_ID);
+
+	cpu_silicon_rev = (int)(val >> 28);
+	cpu_partnumber = (int)((val >> 12) & 0xFFFF);
+}
+
+/*
+ * Returns:
+ *	the silicon revision of the cpu
+ *	-EINVAL - not a mx27
+ */
+int mx27_revision(void)
+{
+	if (cpu_silicon_rev == -1)
+		query_silicon_parameter();
+
+	if (cpu_partnumber != 0x8821)
+		return -EINVAL;
+
+	return cpu_silicon_rev;
+}
+EXPORT_SYMBOL(mx27_revision);

include/asm-arm/arch-mxc/hardware.h

@@ -27,6 +27,9 @@
 #endif
 
 #ifdef CONFIG_ARCH_MX2
+# ifdef CONFIG_MACH_MX27
+#  include <asm/arch/mx27.h>
+# endif
 #endif
 
 #include <asm/arch/mxc.h>

include/asm-arm/arch-mxc/mx27.h

+/*
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA  02110-1301, USA.
+ */
+
+#ifndef __ASM_ARCH_MXC_MX27_H__
+#define __ASM_ARCH_MXC_MX27_H__
+
+#ifndef __ASM_ARCH_MXC_HARDWARE_H__
+#error "Do not include directly."
+#endif
+
+/* IRAM */
+#define IRAM_BASE_ADDR          0xFFFF4C00	/* internal ram */
+
+/* Register offests */
+#define AIPI_BASE_ADDR          0x10000000
+#define AIPI_BASE_ADDR_VIRT     0xF4000000
+#define AIPI_SIZE               SZ_1M
+
+#define DMA_BASE_ADDR           (AIPI_BASE_ADDR + 0x01000)
+#define WDOG_BASE_ADDR          (AIPI_BASE_ADDR + 0x02000)
+#define GPT1_BASE_ADDR          (AIPI_BASE_ADDR + 0x03000)
+#define GPT2_BASE_ADDR          (AIPI_BASE_ADDR + 0x04000)
+#define GPT3_BASE_ADDR          (AIPI_BASE_ADDR + 0x05000)
+#define PWM_BASE_ADDR           (AIPI_BASE_ADDR + 0x06000)
+#define RTC_BASE_ADDR           (AIPI_BASE_ADDR + 0x07000)
+#define KPP_BASE_ADDR           (AIPI_BASE_ADDR + 0x08000)
+#define OWIRE_BASE_ADDR         (AIPI_BASE_ADDR + 0x09000)
+#define UART1_BASE_ADDR         (AIPI_BASE_ADDR + 0x0A000)
+#define UART2_BASE_ADDR         (AIPI_BASE_ADDR + 0x0B000)
+#define UART3_BASE_ADDR         (AIPI_BASE_ADDR + 0x0C000)
+#define UART4_BASE_ADDR         (AIPI_BASE_ADDR + 0x0D000)
+#define CSPI1_BASE_ADDR         (AIPI_BASE_ADDR + 0x0E000)
+#define CSPI2_BASE_ADDR         (AIPI_BASE_ADDR + 0x0F000)
+#define SSI1_BASE_ADDR          (AIPI_BASE_ADDR + 0x10000)
+#define SSI2_BASE_ADDR          (AIPI_BASE_ADDR + 0x11000)
+#define I2C_BASE_ADDR           (AIPI_BASE_ADDR + 0x12000)
+#define SDHC1_BASE_ADDR         (AIPI_BASE_ADDR + 0x13000)
+#define SDHC2_BASE_ADDR         (AIPI_BASE_ADDR + 0x14000)
+#define GPIO_BASE_ADDR          (AIPI_BASE_ADDR + 0x15000)
+#define AUDMUX_BASE_ADDR        (AIPI_BASE_ADDR + 0x16000)
+
+#define CSPI3_BASE_ADDR         (AIPI_BASE_ADDR + 0x17000)
+#define MSHC_BASE_ADDR          (AIPI_BASE_ADDR + 0x18000)
+#define GPT5_BASE_ADDR          (AIPI_BASE_ADDR + 0x19000)
+#define GPT4_BASE_ADDR          (AIPI_BASE_ADDR + 0x1A000)
+#define UART5_BASE_ADDR         (AIPI_BASE_ADDR + 0x1B000)
+#define UART6_BASE_ADDR         (AIPI_BASE_ADDR + 0x1C000)
+#define I2C2_BASE_ADDR          (AIPI_BASE_ADDR + 0x1D000)
+#define SDHC3_BASE_ADDR         (AIPI_BASE_ADDR + 0x1E000)
+#define GPT6_BASE_ADDR          (AIPI_BASE_ADDR + 0x1F000)
+
+#define LCDC_BASE_ADDR          (AIPI_BASE_ADDR + 0x21000)
+#define SLCDC_BASE_ADDR         (AIPI_BASE_ADDR + 0x22000)
+#define VPU_BASE_ADDR           (AIPI_BASE_ADDR + 0x23000)
+#define USBOTG_BASE_ADDR        (AIPI_BASE_ADDR + 0x24000)
+/* for mx27*/
+#define OTG_BASE_ADDR           USBOTG_BASE_ADDR
+#define SAHARA_BASE_ADDR        (AIPI_BASE_ADDR + 0x25000)
+#define EMMA_BASE_ADDR          (AIPI_BASE_ADDR + 0x26400)
+#define CCM_BASE_ADDR           (AIPI_BASE_ADDR + 0x27000)
+#define SYSCTRL_BASE_ADDR       (AIPI_BASE_ADDR + 0x27800)
+#define IIM_BASE_ADDR           (AIPI_BASE_ADDR + 0x28000)
+
+#define RTIC_BASE_ADDR          (AIPI_BASE_ADDR + 0x2A000)
+#define FEC_BASE_ADDR           (AIPI_BASE_ADDR + 0x2B000)
+#define SCC_BASE_ADDR           (AIPI_BASE_ADDR + 0x2C000)
+#define ETB_BASE_ADDR           (AIPI_BASE_ADDR + 0x3B000)
+#define ETB_RAM_BASE_ADDR       (AIPI_BASE_ADDR + 0x3C000)
+
+#define JAM_BASE_ADDR           (AIPI_BASE_ADDR + 0x3E000)
+#define MAX_BASE_ADDR           (AIPI_BASE_ADDR + 0x3F000)
+
+/* ROMP and AVIC */
+#define ROMP_BASE_ADDR          0x10041000
+
+#define AVIC_BASE_ADDR          0x10040000
+
+#define SAHB1_BASE_ADDR         0x80000000
+#define SAHB1_BASE_ADDR_VIRT    0xF4100000
+#define SAHB1_SIZE              SZ_1M
+
+#define CSI_BASE_ADDR           (SAHB1_BASE_ADDR + 0x0000)
+#define ATA_BASE_ADDR           (SAHB1_BASE_ADDR + 0x1000)
+
+/* NAND, SDRAM, WEIM, M3IF, EMI controllers */
+#define X_MEMC_BASE_ADDR        0xD8000000
+#define X_MEMC_BASE_ADDR_VIRT   0xF4200000
+#define X_MEMC_SIZE             SZ_1M
+
+#define NFC_BASE_ADDR           (X_MEMC_BASE_ADDR)
+#define SDRAMC_BASE_ADDR        (X_MEMC_BASE_ADDR + 0x1000)
+#define WEIM_BASE_ADDR          (X_MEMC_BASE_ADDR + 0x2000)
+#define M3IF_BASE_ADDR          (X_MEMC_BASE_ADDR + 0x3000)
+#define PCMCIA_CTL_BASE_ADDR    (X_MEMC_BASE_ADDR + 0x4000)
+
+/* Memory regions and CS */
+#define SDRAM_BASE_ADDR		0xA0000000
+#define CSD1_BASE_ADDR		0xB0000000
+
+#define CS0_BASE_ADDR           0xC0000000
+#define CS1_BASE_ADDR           0xC8000000
+#define CS2_BASE_ADDR           0xD0000000
+#define CS3_BASE_ADDR           0xD2000000
+#define CS4_BASE_ADDR           0xD4000000
+#define CS5_BASE_ADDR           0xD6000000
+#define PCMCIA_MEM_BASE_ADDR    0xDC000000
+
+/*
+ * This macro defines the physical to virtual address mapping for all the
+ * peripheral modules. It is used by passing in the physical address as x
+ * and returning the virtual address. If the physical address is not mapped,
+ * it returns 0xDEADBEEF
+ */
+#define IO_ADDRESS(x)   \
+	(((x >= AIPI_BASE_ADDR) && (x < (AIPI_BASE_ADDR + AIPI_SIZE))) ? \
+		AIPI_IO_ADDRESS(x) : \
+	((x >= SAHB1_BASE_ADDR) && (x < (SAHB1_BASE_ADDR + SAHB1_SIZE))) ? \
+		SAHB1_IO_ADDRESS(x) : \
+	((x >= X_MEMC_BASE_ADDR) && (x < (X_MEMC_BASE_ADDR + X_MEMC_SIZE))) ? \
+		X_MEMC_IO_ADDRESS(x) : 0xDEADBEEF)
+
+/* define the address mapping macros: in physical address order */
+#define AIPI_IO_ADDRESS(x)  \
+	(((x) - AIPI_BASE_ADDR) + AIPI_BASE_ADDR_VIRT)
+
+#define AVIC_IO_ADDRESS(x)	AIPI_IO_ADDRESS(x)
+
+#define SAHB1_IO_ADDRESS(x)  \
+	(((x) - SAHB1_BASE_ADDR) + SAHB1_BASE_ADDR_VIRT)
+
+#define CS4_IO_ADDRESS(x)  \
+	(((x) - CS4_BASE_ADDR) + CS4_BASE_ADDR_VIRT)
+
+#define X_MEMC_IO_ADDRESS(x)  \
+	(((x) - X_MEMC_BASE_ADDR) + X_MEMC_BASE_ADDR_VIRT)
+
+#define PCMCIA_IO_ADDRESS(x) \
+	(((x) - X_MEMC_BASE_ADDR) + X_MEMC_BASE_ADDR_VIRT)
+
+/* fixed interrput numbers */
+#define MXC_INT_CCM		63
+#define MXC_INT_IIM		62
+#define MXC_INT_LCDC		61
+#define MXC_INT_SLCDC		60
+#define MXC_INT_SAHARA		59
+#define MXC_INT_SCC_SCM		58
+#define MXC_INT_SCC_SMN		57
+#define MXC_INT_USB3		56
+#define MXC_INT_USB2		55
+#define MXC_INT_USB1		54
+#define MXC_INT_VPU		53
+#define MXC_INT_EMMAPP		52
+#define MXC_INT_EMMAPRP		51
+#define MXC_INT_FEC		50
+#define MXC_INT_UART5		49
+#define MXC_INT_UART6		48
+#define MXC_INT_DMACH15		47
+#define MXC_INT_DMACH14		46
+#define MXC_INT_DMACH13		45
+#define MXC_INT_DMACH12		44
+#define MXC_INT_DMACH11		43
+#define MXC_INT_DMACH10		42
+#define MXC_INT_DMACH9		41
+#define MXC_INT_DMACH8		40
+#define MXC_INT_DMACH7		39
+#define MXC_INT_DMACH6		38
+#define MXC_INT_DMACH5		37
+#define MXC_INT_DMACH4		36
+#define MXC_INT_DMACH3		35
+#define MXC_INT_DMACH2		34
+#define MXC_INT_DMACH1		33
+#define MXC_INT_DMACH0		32
+#define MXC_INT_CSI		31
+#define MXC_INT_ATA		30
+#define MXC_INT_NANDFC		29
+#define MXC_INT_PCMCIA		28
+#define MXC_INT_WDOG		27
+#define MXC_INT_GPT1		26
+#define MXC_INT_GPT2		25
+#define MXC_INT_GPT3		24
+#define MXC_INT_GPT		INT_GPT1
+#define MXC_INT_PWM		23
+#define MXC_INT_RTC		22
+#define MXC_INT_KPP		21
+#define MXC_INT_UART1		20
+#define MXC_INT_UART2		19
+#define MXC_INT_UART3		18
+#define MXC_INT_UART4		17
+#define MXC_INT_CSPI1		16
+#define MXC_INT_CSPI2		15
+#define MXC_INT_SSI1		14
+#define MXC_INT_SSI2		13
+#define MXC_INT_I2C		12
+#define MXC_INT_SDHC1		11
+#define MXC_INT_SDHC2		10
+#define MXC_INT_SDHC3		9
+#define MXC_INT_GPIO		8
+#define MXC_INT_SDHC		7
+#define MXC_INT_CSPI3		6
+#define MXC_INT_RTIC		5
+#define MXC_INT_GPT4		4
+#define MXC_INT_GPT5		3
+#define MXC_INT_GPT6		2
+#define MXC_INT_I2C2		1
+
+/* fixed DMA request numbers */
+#define DMA_REQ_NFC             37
+#define DMA_REQ_SDHC3           36
+#define DMA_REQ_UART6_RX        35
+#define DMA_REQ_UART6_TX        34
+#define DMA_REQ_UART5_RX        33
+#define DMA_REQ_UART5_TX        32
+#define DMA_REQ_CSI_RX          31
+#define DMA_REQ_CSI_STAT        30
+#define DMA_REQ_ATA_RCV         29
+#define DMA_REQ_ATA_TX          28
+#define DMA_REQ_UART1_TX        27
+#define DMA_REQ_UART1_RX        26
+#define DMA_REQ_UART2_TX        25
+#define DMA_REQ_UART2_RX        24
+#define DMA_REQ_UART3_TX        23
+#define DMA_REQ_UART3_RX        22
+#define DMA_REQ_UART4_TX        21
+#define DMA_REQ_UART4_RX        20
+#define DMA_REQ_CSPI1_TX        19
+#define DMA_REQ_CSPI1_RX        18
+#define DMA_REQ_CSPI2_TX        17
+#define DMA_REQ_CSPI2_RX        16
+#define DMA_REQ_SSI1_TX1        15
+#define DMA_REQ_SSI1_RX1        14
+#define DMA_REQ_SSI1_TX0        13
+#define DMA_REQ_SSI1_RX0        12
+#define DMA_REQ_SSI2_TX1        11
+#define DMA_REQ_SSI2_RX1        10
+#define DMA_REQ_SSI2_TX0        9
+#define DMA_REQ_SSI2_RX0        8
+#define DMA_REQ_SDHC1           7
+#define DMA_REQ_SDHC2           6
+#define DMA_REQ_MSHC            4
+#define DMA_REQ_EXT             3
+#define DMA_REQ_CSPI3_TX        2
+#define DMA_REQ_CSPI3_RX        1
+
+/* silicon revisions specific to i.MX27 */
+#define CHIP_REV_1_0		0x00
+#define CHIP_REV_2_0		0x01
+
+#ifndef __ASSEMBLY__
+extern int mx27_revision(void);
+#endif
+
+/* gpio and gpio based interrupt handling */
+#define GPIO_DR		 	0x1C
+#define GPIO_GDIR	 	0x00
+#define GPIO_PSR	 	0x24
+#define GPIO_ICR1	 	0x28
+#define GPIO_ICR2	 	0x2C
+#define GPIO_IMR	 	0x30
+#define GPIO_ISR	 	0x34
+#define GPIO_INT_LOW_LEV	0x3
+#define GPIO_INT_HIGH_LEV	0x2
+#define GPIO_INT_RISE_EDGE 	0x0
+#define GPIO_INT_FALL_EDGE	0x1
+#define GPIO_INT_NONE		0x4
+
+/* Mandatory defines used globally */
+
+/* this is an i.MX27 CPU */
+#define cpu_is_mx27()		(1)
+
+/* this CPU supports up to 192 GPIOs (don't forget the baseboard!) */
+#define ARCH_NR_GPIOS		(192 + 16)
+
+/* OS clock tick rate */
+#define CLOCK_TICK_RATE         13300000
+
+/* Start of RAM */
+#define PHYS_OFFSET		SDRAM_BASE_ADDR
+
+/* max interrupt lines count */
+#define NR_IRQS			256
+
+/* count of internal interrupt sources */
+#define MXC_MAX_INT_LINES	64
+
+#endif /* __ASM_ARCH_MXC_MX27_H__ */

include/asm-arm/arch-mxc/mxc.h

@@ -29,4 +29,8 @@
 # define cpu_is_mx31() (0)
 #endif
 
+#ifndef CONFIG_MACH_MX27
+# define cpu_is_mx27() (0)
+#endif
+
 #endif /*  __ASM_ARCH_MXC_H__ */