[ARM] 5473/1: U300 core machine support

This adds core support for the ST-Ericsson U300 series
platforms: U300, U330, U335 and U365. Supports memory
mappings, interrupt controller, system timer (clocksource
and clockevents), and binds to the existing drivers for
the PrimeCells used in this design: PL190 (VIC), PL180
(MMC/SD host) and PL011 (UART). This is intented to serve
as starting point for our mainling work, more patches to
follow.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-u300/Kconfig

+if ARCH_U300
+
+menu "ST-Ericsson AB U300/U330/U335/U365 Platform"
+
+comment "ST-Ericsson Mobile Platform Products"
+
+config MACH_U300
+	bool "U300"
+
+comment "ST-Ericsson U300/U330/U335/U365 Feature Selections"
+
+choice
+	prompt "U300/U330/U335/U365 system type"
+	default MACH_U300_BS2X
+	---help---
+	You need to select the target system, i.e. the
+	U300/U330/U335/U365 board that you want to compile your kernel
+	for.
+
+config MACH_U300_BS2X
+	bool "S26/S26/B25/B26 Test Products"
+	depends on MACH_U300
+	help
+		Select this if you're developing on the
+		S26/S25 test products. (Also works on
+		B26/B25 big boards.)
+
+config MACH_U300_BS330
+	bool "S330/B330 Test Products"
+	depends on MACH_U300
+	help
+		Select this if you're developing on the
+		S330/B330 test products.
+
+config MACH_U300_BS335
+	bool "S335/B335 Test Products"
+	depends on MACH_U300
+	help
+		Select this if you're developing on the
+		S335/B335 test products.
+
+config MACH_U300_BS365
+	bool "S365/B365 Test Products"
+	depends on MACH_U300
+	help
+		Select this if you're developing on the
+		S365/B365 test products.
+
+endchoice
+
+choice
+	prompt "Memory configuration"
+	default MACH_U300_SINGLE_RAM
+	---help---
+	You have to config the kernel according to the physical memory
+	configuration.
+
+config MACH_U300_SINGLE_RAM
+	bool "Single RAM"
+	help
+		Select this if you want support for Single RAM phones.
+
+config MACH_U300_DUAL_RAM
+	bool "Dual RAM"
+	help
+		Select this if you want support for Dual RAM phones.
+		This is two RAM memorys on different EMIFs.
+endchoice
+
+config U300_DEBUG
+	bool "Debug support for U300"
+	depends on PM
+	help
+		Debug support for U300 in sysfs, procfs etc.
+
+config MACH_U300_SEMI_IS_SHARED
+	bool "The SEMI is used by both the access and application side"
+	depends on MACH_U300
+	help
+		This makes it possible to use the SEMI (Shared External
+		Memory Interface) from both from access and application
+		side.
+
+comment "All the settings below must match the bootloader's settings"
+
+config MACH_U300_ACCESS_MEM_SIZE
+       int "Access CPU memory allocation"
+       range 7 25
+       depends on MACH_U300_SINGLE_RAM
+       default 13
+       help
+		How much memory in MiB that the Access side CPU has allocated
+
+config MACH_U300_2MB_ALIGNMENT_FIX
+       bool "2MiB alignment fix"
+       depends on MACH_U300_SINGLE_RAM
+       default y
+       help
+		If yes and the Access side CPU has allocated an odd size in
+		MiB, this fix gives you one MiB extra that would otherwise be
+		lost due to Linux 2 MiB alignment policy.
+
+endmenu
+
+endif

arch/arm/mach-u300/Makefile

+#
+# Makefile for the linux kernel, U300 machine.
+#
+
+obj-y		:= core.o clock.o timer.o gpio.o padmux.o
+obj-m		:=
+obj-n		:=
+obj-		:=
+
+obj-$(CONFIG_ARCH_U300)	          += u300.o
+obj-$(CONFIG_MMC)                 += mmc.o

arch/arm/mach-u300/include/mach/debug-macro.S

+/*
+ *
+ * arch-arm/mach-u300/include/mach/debug-macro.S
+ *
+ *
+ * Copyright (C) 2006-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * Debugging macro include header.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+#include <mach/hardware.h>
+
+	.macro	addruart,rx
+	/* If we move the adress using MMU, use this. */
+	mrc	p15, 0, \rx, c1, c0
+	tst	\rx, #1			@ MMU enabled?
+	ldreq	\rx,	  = U300_SLOW_PER_PHYS_BASE @ MMU off, physical address
+	ldrne	\rx,	  = U300_SLOW_PER_VIRT_BASE @ MMU on, virtual address
+	orr	\rx, \rx, #0x00003000
+	.endm
+
+#include <asm/hardware/debug-pl01x.S>

arch/arm/mach-u300/include/mach/entry-macro.S

+/*
+ *
+ * arch-arm/mach-u300/include/mach/entry-macro.S
+ *
+ *
+ * Copyright (C) 2006-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * Low-level IRQ helper macros for ST-Ericsson U300
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+#include <mach/hardware.h>
+#include <asm/hardware/vic.h>
+
+	.macro	disable_fiq
+	.endm
+
+	.macro  get_irqnr_preamble, base, tmp
+	.endm
+
+	.macro  arch_ret_to_user, tmp1, tmp2
+	.endm
+
+	.macro	get_irqnr_and_base, irqnr, irqstat, base, tmp
+	ldr	\base, = U300_AHB_PER_VIRT_BASE-U300_AHB_PER_PHYS_BASE+U300_INTCON0_BASE
+	ldr	\irqstat, [\base, #VIC_IRQ_STATUS] @ get masked status
+	mov	\irqnr, #0
+	teq	\irqstat, #0
+	bne	1002f
+1001:	ldr	\base, = U300_AHB_PER_VIRT_BASE-U300_AHB_PER_PHYS_BASE+U300_INTCON1_BASE
+	ldr	\irqstat, [\base, #VIC_IRQ_STATUS] @ get masked status
+	mov	\irqnr, #32
+	teq	\irqstat, #0
+	beq	1003f
+1002:	tst	\irqstat, #1
+	bne	1003f
+	add	\irqnr, \irqnr, #1
+	movs	\irqstat, \irqstat, lsr #1
+	bne	1002b
+1003:		/* EQ will be set if no irqs pending */
+	.endm

arch/arm/mach-u300/include/mach/memory.h

+/*
+ *
+ * arch/arm/mach-u300/include/mach/memory.h
+ *
+ *
+ * Copyright (C) 2007-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * Memory virtual/physical mapping constants.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
+ */
+
+#ifndef __MACH_MEMORY_H
+#define __MACH_MEMORY_H
+
+#ifdef CONFIG_MACH_U300_DUAL_RAM
+
+#define PHYS_OFFSET		UL(0x48000000)
+#define BOOT_PARAMS_OFFSET	(PHYS_OFFSET + 0x100)
+
+#else
+
+#ifdef CONFIG_MACH_U300_2MB_ALIGNMENT_FIX
+#define PHYS_OFFSET (0x28000000 + \
+	     (CONFIG_MACH_U300_ACCESS_MEM_SIZE - \
+	     (CONFIG_MACH_U300_ACCESS_MEM_SIZE & 1))*1024*1024)
+#else
+#define PHYS_OFFSET (0x28000000 + \
+	     (CONFIG_MACH_U300_ACCESS_MEM_SIZE +	\
+	     (CONFIG_MACH_U300_ACCESS_MEM_SIZE & 1))*1024*1024)
+#endif
+#define BOOT_PARAMS_OFFSET (0x28000000 + \
+	    (CONFIG_MACH_U300_ACCESS_MEM_SIZE +		\
+	    (CONFIG_MACH_U300_ACCESS_MEM_SIZE & 1))*1024*1024 + 0x100)
+#endif
+
+/*
+ * We enable a real big DMA buffer if need be.
+ */
+#define CONSISTENT_DMA_SIZE SZ_4M
+
+#endif

arch/arm/mach-u300/include/mach/platform.h

+/*
+ *
+ * arch/arm/mach-u300/include/mach/platform.h
+ *
+ *
+ * Copyright (C) 2006-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * Basic platform init and mapping functions.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+
+#ifndef __ASSEMBLY__
+
+void u300_map_io(void);
+void u300_init_irq(void);
+void u300_init_devices(void);
+extern struct sys_timer u300_timer;
+
+#endif

arch/arm/mach-u300/include/mach/system.h

+/*
+ *
+ * arch/arm/mach-u300/include/mach/system.h
+ *
+ *
+ * Copyright (C) 2007-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * System shutdown and reset functions.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+#include <mach/hardware.h>
+#include <asm/io.h>
+#include <asm/hardware/vic.h>
+#include <asm/irq.h>
+
+/* Forward declare this function from the watchdog */
+void coh901327_watchdog_reset(void);
+
+static inline void arch_idle(void)
+{
+	cpu_do_idle();
+}
+
+static void arch_reset(char mode, const char *cmd)
+{
+	switch (mode) {
+	case 's':
+	case 'h':
+		printk(KERN_CRIT "RESET: shutting down/rebooting system\n");
+		/* Disable interrupts */
+		local_irq_disable();
+#ifdef CONFIG_COH901327_WATCHDOG
+		coh901327_watchdog_reset();
+#endif
+		break;
+	default:
+		/* Do nothing */
+		break;
+	}
+	/* Wait for system do die/reset. */
+	while (1);
+}

arch/arm/mach-u300/include/mach/timex.h

+/*
+ *
+ * arch/arm/mach-u300/include/mach/timex.h
+ *
+ *
+ * Copyright (C) 2006-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * Platform tick rate definition.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+#ifndef __MACH_TIMEX_H
+#define __MACH_TIMEX_H
+
+/* This is for the APP OS GP1 (General Purpose 1) timer */
+#define CLOCK_TICK_RATE		1000000
+
+#endif

arch/arm/mach-u300/include/mach/uncompress.h

+/*
+ * arch/arm/mach-u300/include/mach/uncompress.h
+ *
+ * Copyright (C) 2003 ARM Limited
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#define AMBA_UART_DR	(*(volatile unsigned char *)0xc0013000)
+#define AMBA_UART_LCRH	(*(volatile unsigned char *)0xc001302C)
+#define AMBA_UART_CR	(*(volatile unsigned char *)0xc0013030)
+#define AMBA_UART_FR	(*(volatile unsigned char *)0xc0013018)
+
+/*
+ * This does not append a newline
+ */
+static inline void putc(int c)
+{
+	while (AMBA_UART_FR & (1 << 5))
+		barrier();
+
+	AMBA_UART_DR = c;
+}
+
+static inline void flush(void)
+{
+	while (AMBA_UART_FR & (1 << 3))
+		barrier();
+}
+
+/*
+ * nothing to do
+ */
+#define arch_decomp_setup()
+#define arch_decomp_wdog()

arch/arm/mach-u300/include/mach/vmalloc.h

+/*
+ *
+ * arch/arm/mach-u300/include/mach/vmalloc.h
+ *
+ *
+ * Copyright (C) 2006-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * Virtual memory allocations
+ * End must be above the I/O registers and on an even 2MiB boundary.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+#define VMALLOC_END	0xfe800000

arch/arm/mach-u300/mmc.c

+/*
+ *
+ * arch/arm/mach-u300/mmc.c
+ *
+ *
+ * Copyright (C) 2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ *
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ * Author: Johan Lundin <johan.lundin@stericsson.com>
+ * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
+ */
+#include <linux/device.h>
+#include <linux/amba/bus.h>
+#include <linux/mmc/host.h>
+#include <linux/input.h>
+#include <linux/workqueue.h>
+#include <linux/delay.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regulator/machine.h>
+#include <linux/gpio.h>
+
+#include <asm/mach/mmc.h>
+#include "mmc.h"
+
+struct mmci_card_event {
+	struct input_dev *mmc_input;
+	int mmc_inserted;
+	struct work_struct workq;
+	struct mmc_platform_data mmc0_plat_data;
+};
+
+static unsigned int mmc_status(struct device *dev)
+{
+	struct mmci_card_event *mmci_card = container_of(
+		dev->platform_data,
+		struct mmci_card_event, mmc0_plat_data);
+
+	return mmci_card->mmc_inserted;
+}
+
+/*
+ * Here follows a large chunk of code which will only be enabled if you
+ * have both the AB3100 chip mounted and the MMC subsystem activated.
+ */
+
+static u32 mmc_translate_vdd(struct device *dev, unsigned int voltage)
+{
+	int v;
+
+	/*
+	 * MMC Spec:
+	 * bit 7:	1.70 - 1.95V
+	 * bit 8 - 14:	2.0 - 2.6V
+	 * bit 15 - 23:	2.7 - 3.6V
+	 *
+	 * ab3100 voltages:
+	 * 000 - 2.85V
+	 * 001 - 2.75V
+	 * 010 - 1.8V
+	 * 011 - 1.5V
+	 */
+	switch (voltage) {
+	case 8:
+		v = 3;
+		break;
+	case 9:
+	case 10:
+	case 11:
+	case 12:
+	case 13:
+	case 14:
+	case 15:
+		v = 1;
+		break;
+	case 16:
+		v = 1;
+		break;
+	case 17:
+	case 18:
+	case 19:
+	case 20:
+	case 21:
+	case 22:
+	case 23:
+	case 24:
+		v = 0;
+		break;
+	default:
+		v = 0;
+		break;
+	}
+
+	/* PL180 voltage register bits */
+	return v << 2;
+}
+
+
+
+static int mmci_callback(void *data)
+{
+	struct mmci_card_event *mmci_card = data;
+
+	disable_irq_on_gpio_pin(U300_GPIO_PIN_MMC_CD);
+	schedule_work(&mmci_card->workq);
+
+	return 0;
+}
+
+
+static ssize_t gpio_show(struct device *dev, struct device_attribute *attr,
+		  char *buf)
+{
+	struct mmci_card_event *mmci_card = container_of(
+		dev->platform_data,
+		struct mmci_card_event, mmc0_plat_data);
+
+
+	return sprintf(buf, "%d\n", !mmci_card->mmc_inserted);
+}
+
+static DEVICE_ATTR(mmc_inserted, S_IRUGO, gpio_show, NULL);
+
+static void _mmci_callback(struct work_struct *ws)
+{
+
+	struct mmci_card_event *mmci_card = container_of(
+		ws,
+		struct mmci_card_event, workq);
+
+	mdelay(20);
+
+	mmci_card->mmc_inserted = !!gpio_get_value(U300_GPIO_PIN_MMC_CD);
+
+	input_report_switch(mmci_card->mmc_input, KEY_INSERT,
+			    !mmci_card->mmc_inserted);
+	input_sync(mmci_card->mmc_input);
+
+	pr_debug("MMC/SD card was %s\n",
+		 mmci_card->mmc_inserted ? "removed" : "inserted");
+
+	enable_irq_on_gpio_pin(U300_GPIO_PIN_MMC_CD, !mmci_card->mmc_inserted);
+}
+
+int __devinit mmc_init(struct amba_device *adev)
+{
+	struct mmci_card_event *mmci_card;
+	struct device *mmcsd_device = &adev->dev;
+	int ret = 0;
+
+	mmci_card = kzalloc(sizeof(struct mmci_card_event), GFP_KERNEL);
+	if (!mmci_card)
+		return -ENOMEM;
+
+	/* Nominally 2.85V on our platform */
+	mmci_card->mmc0_plat_data.ocr_mask = MMC_VDD_28_29;
+	mmci_card->mmc0_plat_data.translate_vdd = mmc_translate_vdd;
+	mmci_card->mmc0_plat_data.status = mmc_status;
+
+	mmcsd_device->platform_data = (void *) &mmci_card->mmc0_plat_data;
+
+	INIT_WORK(&mmci_card->workq, _mmci_callback);
+
+	ret = gpio_request(U300_GPIO_PIN_MMC_CD, "MMC card detection");
+	if (ret) {
+		printk(KERN_CRIT "Could not allocate MMC card detection " \
+		       "GPIO pin\n");
+		goto out;
+	}
+
+	ret = gpio_direction_input(U300_GPIO_PIN_MMC_CD);
+	if (ret) {
+		printk(KERN_CRIT "Invalid GPIO pin requested\n");
+		goto out;
+	}
+
+	ret = sysfs_create_file(&mmcsd_device->kobj,
+			       &dev_attr_mmc_inserted.attr);
+	if (ret)
+		goto out;
+
+	mmci_card->mmc_input = input_allocate_device();
+	if (!mmci_card->mmc_input) {
+		printk(KERN_CRIT "Could not allocate MMC input device\n");
+		return -ENOMEM;
+	}
+
+	mmci_card->mmc_input->name = "MMC insert notification";
+	mmci_card->mmc_input->id.bustype = BUS_HOST;
+	mmci_card->mmc_input->id.vendor = 0;
+	mmci_card->mmc_input->id.product = 0;
+	mmci_card->mmc_input->id.version = 0x0100;
+	mmci_card->mmc_input->dev.parent = mmcsd_device;
+	input_set_capability(mmci_card->mmc_input, EV_SW, KEY_INSERT);
+
+	/*
+	 * Since this must always be compiled into the kernel, this input
+	 * is never unregistered or free:ed.
+	 */
+	ret = input_register_device(mmci_card->mmc_input);
+	if (ret) {
+		input_free_device(mmci_card->mmc_input);
+		goto out;
+	}
+
+	input_set_drvdata(mmci_card->mmc_input, mmci_card);
+
+	ret = gpio_register_callback(U300_GPIO_PIN_MMC_CD, mmci_callback,
+				     mmci_card);
+
+	schedule_work(&mmci_card->workq);
+
+	printk(KERN_INFO "Registered MMC insert/remove notification\n");
+out:
+	return ret;
+}

arch/arm/mach-u300/mmc.h

+/*
+ *
+ * arch/arm/mach-u300/mmc.h
+ *
+ *
+ * Copyright (C) 2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ *
+ * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
+ */
+#ifndef MMC_H
+#define MMC_H
+
+#include <linux/amba/bus.h>
+
+int __devinit mmc_init(struct amba_device *adev);
+
+#endif

arch/arm/mach-u300/u300.c

+/*
+ *
+ * arch/arm/mach-u300/u300.c
+ *
+ *
+ * Copyright (C) 2006-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * Platform machine definition.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <mach/hardware.h>
+#include <mach/platform.h>
+#include <mach/memory.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+
+static void __init u300_init_machine(void)
+{
+	u300_init_devices();
+}
+
+#ifdef CONFIG_MACH_U300_BS2X
+#define MACH_U300_STRING "Ericsson AB U300 S25/S26/B25/B26 Prototype Board"
+#endif
+
+#ifdef CONFIG_MACH_U300_BS330
+#define MACH_U300_STRING "Ericsson AB U330 S330/B330 Prototype Board"
+#endif
+
+#ifdef CONFIG_MACH_U300_BS335
+#define MACH_U300_STRING "Ericsson AB U335 S335/B335 Prototype Board"
+#endif
+
+#ifdef CONFIG_MACH_U300_BS365
+#define MACH_U300_STRING "Ericsson AB U365 S365/B365 Prototype Board"
+#endif
+
+MACHINE_START(U300, MACH_U300_STRING)
+	/* Maintainer: Linus Walleij <linus.walleij@stericsson.com> */
+	.phys_io	= U300_AHB_PER_PHYS_BASE,
+	.io_pg_offst	= ((U300_AHB_PER_VIRT_BASE) >> 18) & 0xfffc,
+	.boot_params	= BOOT_PARAMS_OFFSET,
+	.map_io		= u300_map_io,
+	.init_irq	= u300_init_irq,
+	.timer		= &u300_timer,
+	.init_machine	= u300_init_machine,
+MACHINE_END