[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>
diff --git a/arch/arm/mach-u300/Kconfig b/arch/arm/mach-u300/Kconfig
new file mode 100644
index 0000000..337b9aa
--- /dev/null
+++ b/arch/arm/mach-u300/Kconfig
@@ -0,0 +1,105 @@
+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
diff --git a/arch/arm/mach-u300/Makefile b/arch/arm/mach-u300/Makefile
new file mode 100644
index 0000000..24950e0
--- /dev/null
+++ b/arch/arm/mach-u300/Makefile
@@ -0,0 +1,11 @@
+#
+# 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
diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c
new file mode 100644
index 0000000..1f2ed21
--- /dev/null
+++ b/arch/arm/mach-u300/core.c
@@ -0,0 +1,649 @@
+/*
+ *
+ * arch/arm/mach-u300/core.c
+ *
+ *
+ * Copyright (C) 2007-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * Core platform support, IRQ handling and device definitions.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/mm.h>
+#include <linux/termios.h>
+#include <linux/amba/bus.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+
+#include <asm/types.h>
+#include <asm/setup.h>
+#include <asm/memory.h>
+#include <asm/hardware/vic.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+
+#include <mach/hardware.h>
+#include <mach/syscon.h>
+
+#include "clock.h"
+#include "mmc.h"
+
+/*
+ * Static I/O mappings that are needed for booting the U300 platforms. The
+ * only things we need are the areas where we find the timer, syscon and
+ * intcon, since the remaining device drivers will map their own memory
+ * physical to virtual as the need arise.
+ */
+static struct map_desc u300_io_desc[] __initdata = {
+ {
+ .virtual = U300_SLOW_PER_VIRT_BASE,
+ .pfn = __phys_to_pfn(U300_SLOW_PER_PHYS_BASE),
+ .length = SZ_64K,
+ .type = MT_DEVICE,
+ },
+ {
+ .virtual = U300_AHB_PER_VIRT_BASE,
+ .pfn = __phys_to_pfn(U300_AHB_PER_PHYS_BASE),
+ .length = SZ_32K,
+ .type = MT_DEVICE,
+ },
+ {
+ .virtual = U300_FAST_PER_VIRT_BASE,
+ .pfn = __phys_to_pfn(U300_FAST_PER_PHYS_BASE),
+ .length = SZ_32K,
+ .type = MT_DEVICE,
+ },
+ {
+ .virtual = 0xffff2000, /* TCM memory */
+ .pfn = __phys_to_pfn(0xffff2000),
+ .length = SZ_16K,
+ .type = MT_DEVICE,
+ },
+
+ /*
+ * This overlaps with the IRQ vectors etc at 0xffff0000, so these
+ * may have to be moved to 0x00000000 in order to use the ROM.
+ */
+ /*
+ {
+ .virtual = U300_BOOTROM_VIRT_BASE,
+ .pfn = __phys_to_pfn(U300_BOOTROM_PHYS_BASE),
+ .length = SZ_64K,
+ .type = MT_ROM,
+ },
+ */
+};
+
+void __init u300_map_io(void)
+{
+ iotable_init(u300_io_desc, ARRAY_SIZE(u300_io_desc));
+}
+
+/*
+ * Declaration of devices found on the U300 board and
+ * their respective memory locations.
+ */
+static struct amba_device uart0_device = {
+ .dev = {
+ .init_name = "uart0", /* Slow device at 0x3000 offset */
+ .platform_data = NULL,
+ },
+ .res = {
+ .start = U300_UART0_BASE,
+ .end = U300_UART0_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ .irq = { IRQ_U300_UART0, NO_IRQ },
+};
+
+/* The U335 have an additional UART1 on the APP CPU */
+#ifdef CONFIG_MACH_U300_BS335
+static struct amba_device uart1_device = {
+ .dev = {
+ .init_name = "uart1", /* Fast device at 0x7000 offset */
+ .platform_data = NULL,
+ },
+ .res = {
+ .start = U300_UART1_BASE,
+ .end = U300_UART1_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ .irq = { IRQ_U300_UART1, NO_IRQ },
+};
+#endif
+
+static struct amba_device pl172_device = {
+ .dev = {
+ .init_name = "pl172", /* AHB device at 0x4000 offset */
+ .platform_data = NULL,
+ },
+ .res = {
+ .start = U300_EMIF_CFG_BASE,
+ .end = U300_EMIF_CFG_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+
+/*
+ * Everything within this next ifdef deals with external devices connected to
+ * the APP SPI bus.
+ */
+static struct amba_device pl022_device = {
+ .dev = {
+ .coherent_dma_mask = ~0,
+ .init_name = "pl022", /* Fast device at 0x6000 offset */
+ },
+ .res = {
+ .start = U300_SPI_BASE,
+ .end = U300_SPI_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ .irq = {IRQ_U300_SPI, NO_IRQ },
+ /*
+ * This device has a DMA channel but the Linux driver does not use
+ * it currently.
+ */
+};
+
+static struct amba_device mmcsd_device = {
+ .dev = {
+ .init_name = "mmci", /* Fast device at 0x1000 offset */
+ .platform_data = NULL, /* Added later */
+ },
+ .res = {
+ .start = U300_MMCSD_BASE,
+ .end = U300_MMCSD_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ .irq = {IRQ_U300_MMCSD_MCIINTR0, IRQ_U300_MMCSD_MCIINTR1 },
+ /*
+ * This device has a DMA channel but the Linux driver does not use
+ * it currently.
+ */
+};
+
+/*
+ * The order of device declaration may be important, since some devices
+ * have dependencies on other devices being initialized first.
+ */
+static struct amba_device *amba_devs[] __initdata = {
+ &uart0_device,
+#ifdef CONFIG_MACH_U300_BS335
+ &uart1_device,
+#endif
+ &pl022_device,
+ &pl172_device,
+ &mmcsd_device,
+};
+
+/* Here follows a list of all hw resources that the platform devices
+ * allocate. Note, clock dependencies are not included
+ */
+
+static struct resource gpio_resources[] = {
+ {
+ .start = U300_GPIO_BASE,
+ .end = (U300_GPIO_BASE + SZ_4K - 1),
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .name = "gpio0",
+ .start = IRQ_U300_GPIO_PORT0,
+ .end = IRQ_U300_GPIO_PORT0,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ .name = "gpio1",
+ .start = IRQ_U300_GPIO_PORT1,
+ .end = IRQ_U300_GPIO_PORT1,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ .name = "gpio2",
+ .start = IRQ_U300_GPIO_PORT2,
+ .end = IRQ_U300_GPIO_PORT2,
+ .flags = IORESOURCE_IRQ,
+ },
+#ifdef U300_COH901571_3
+ {
+ .name = "gpio3",
+ .start = IRQ_U300_GPIO_PORT3,
+ .end = IRQ_U300_GPIO_PORT3,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ .name = "gpio4",
+ .start = IRQ_U300_GPIO_PORT4,
+ .end = IRQ_U300_GPIO_PORT4,
+ .flags = IORESOURCE_IRQ,
+ },
+#ifdef CONFIG_MACH_U300_BS335
+ {
+ .name = "gpio5",
+ .start = IRQ_U300_GPIO_PORT5,
+ .end = IRQ_U300_GPIO_PORT5,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ .name = "gpio6",
+ .start = IRQ_U300_GPIO_PORT6,
+ .end = IRQ_U300_GPIO_PORT6,
+ .flags = IORESOURCE_IRQ,
+ },
+#endif /* CONFIG_MACH_U300_BS335 */
+#endif /* U300_COH901571_3 */
+};
+
+static struct resource keypad_resources[] = {
+ {
+ .start = U300_KEYPAD_BASE,
+ .end = U300_KEYPAD_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .name = "coh901461-press",
+ .start = IRQ_U300_KEYPAD_KEYBF,
+ .end = IRQ_U300_KEYPAD_KEYBF,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ .name = "coh901461-release",
+ .start = IRQ_U300_KEYPAD_KEYBR,
+ .end = IRQ_U300_KEYPAD_KEYBR,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct resource rtc_resources[] = {
+ {
+ .start = U300_RTC_BASE,
+ .end = U300_RTC_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = IRQ_U300_RTC,
+ .end = IRQ_U300_RTC,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+/*
+ * Fsmc does have IRQs: #43 and #44 (NFIF and NFIF2)
+ * but these are not yet used by the driver.
+ */
+static struct resource fsmc_resources[] = {
+ {
+ .start = U300_NAND_IF_PHYS_BASE,
+ .end = U300_NAND_IF_PHYS_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct resource i2c0_resources[] = {
+ {
+ .start = U300_I2C0_BASE,
+ .end = U300_I2C0_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = IRQ_U300_I2C0,
+ .end = IRQ_U300_I2C0,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct resource i2c1_resources[] = {
+ {
+ .start = U300_I2C1_BASE,
+ .end = U300_I2C1_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = IRQ_U300_I2C1,
+ .end = IRQ_U300_I2C1,
+ .flags = IORESOURCE_IRQ,
+ },
+
+};
+
+static struct resource wdog_resources[] = {
+ {
+ .start = U300_WDOG_BASE,
+ .end = U300_WDOG_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = IRQ_U300_WDOG,
+ .end = IRQ_U300_WDOG,
+ .flags = IORESOURCE_IRQ,
+ }
+};
+
+/* TODO: These should be protected by suitable #ifdef's */
+static struct resource ave_resources[] = {
+ {
+ .name = "AVE3e I/O Area",
+ .start = U300_VIDEOENC_BASE,
+ .end = U300_VIDEOENC_BASE + SZ_512K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .name = "AVE3e IRQ0",
+ .start = IRQ_U300_VIDEO_ENC_0,
+ .end = IRQ_U300_VIDEO_ENC_0,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ .name = "AVE3e IRQ1",
+ .start = IRQ_U300_VIDEO_ENC_1,
+ .end = IRQ_U300_VIDEO_ENC_1,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ .name = "AVE3e Physmem Area",
+ .start = 0, /* 0 will be remapped to reserved memory */
+ .end = SZ_1M - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ /*
+ * The AVE3e requires two regions of 256MB that it considers
+ * "invisible". The hardware will not be able to access these
+ * adresses, so they should never point to system RAM.
+ */
+ {
+ .name = "AVE3e Reserved 0",
+ .start = 0xd0000000,
+ .end = 0xd0000000 + SZ_256M - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .name = "AVE3e Reserved 1",
+ .start = 0xe0000000,
+ .end = 0xe0000000 + SZ_256M - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct platform_device wdog_device = {
+ .name = "wdog",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(wdog_resources),
+ .resource = wdog_resources,
+};
+
+static struct platform_device i2c0_device = {
+ .name = "stddci2c",
+ .id = 0,
+ .num_resources = ARRAY_SIZE(i2c0_resources),
+ .resource = i2c0_resources,
+};
+
+static struct platform_device i2c1_device = {
+ .name = "stddci2c",
+ .id = 1,
+ .num_resources = ARRAY_SIZE(i2c1_resources),
+ .resource = i2c1_resources,
+};
+
+static struct platform_device gpio_device = {
+ .name = "u300-gpio",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(gpio_resources),
+ .resource = gpio_resources,
+};
+
+static struct platform_device keypad_device = {
+ .name = "keypad",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(keypad_resources),
+ .resource = keypad_resources,
+};
+
+static struct platform_device rtc_device = {
+ .name = "rtc0",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(rtc_resources),
+ .resource = rtc_resources,
+};
+
+static struct platform_device fsmc_device = {
+ .name = "nandif",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(fsmc_resources),
+ .resource = fsmc_resources,
+};
+
+static struct platform_device ave_device = {
+ .name = "video_enc",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(ave_resources),
+ .resource = ave_resources,
+};
+
+/*
+ * Notice that AMBA devices are initialized before platform devices.
+ *
+ */
+static struct platform_device *platform_devs[] __initdata = {
+ &i2c0_device,
+ &i2c1_device,
+ &keypad_device,
+ &rtc_device,
+ &gpio_device,
+ &fsmc_device,
+ &wdog_device,
+ &ave_device
+};
+
+
+/*
+ * Interrupts: the U300 platforms have two pl190 ARM PrimeCells connected
+ * together so some interrupts are connected to the first one and some
+ * to the second one.
+ */
+void __init u300_init_irq(void)
+{
+ u32 mask[2] = {0, 0};
+ int i;
+
+ for (i = 0; i < NR_IRQS; i++)
+ set_bit(i, (unsigned long *) &mask[0]);
+ u300_enable_intcon_clock();
+ vic_init((void __iomem *) U300_INTCON0_VBASE, 0, mask[0]);
+ vic_init((void __iomem *) U300_INTCON1_VBASE, 32, mask[1]);
+}
+
+
+/*
+ * U300 platforms peripheral handling
+ */
+struct db_chip {
+ u16 chipid;
+ const char *name;
+};
+
+/*
+ * This is a list of the Digital Baseband chips used in the U300 platform.
+ */
+static struct db_chip db_chips[] __initdata = {
+ {
+ .chipid = 0xb800,
+ .name = "DB3000",
+ },
+ {
+ .chipid = 0xc000,
+ .name = "DB3100",
+ },
+ {
+ .chipid = 0xc800,
+ .name = "DB3150",
+ },
+ {
+ .chipid = 0xd800,
+ .name = "DB3200",
+ },
+ {
+ .chipid = 0xe000,
+ .name = "DB3250",
+ },
+ {
+ .chipid = 0xe800,
+ .name = "DB3210",
+ },
+ {
+ .chipid = 0xf000,
+ .name = "DB3350 P1x",
+ },
+ {
+ .chipid = 0xf100,
+ .name = "DB3350 P2x",
+ },
+ {
+ .chipid = 0x0000, /* List terminator */
+ .name = NULL,
+ }
+};
+
+static void u300_init_check_chip(void)
+{
+
+ u16 val;
+ struct db_chip *chip;
+ const char *chipname;
+ const char unknown[] = "UNKNOWN";
+
+ /* Read out and print chip ID */
+ val = readw(U300_SYSCON_VBASE + U300_SYSCON_CIDR);
+ /* This is in funky bigendian order... */
+ val = (val & 0xFFU) << 8 | (val >> 8);
+ chip = db_chips;
+ chipname = unknown;
+
+ for ( ; chip->chipid; chip++) {
+ if (chip->chipid == (val & 0xFF00U)) {
+ chipname = chip->name;
+ break;
+ }
+ }
+ printk(KERN_INFO "Initializing U300 system on %s baseband chip " \
+ "(chip ID 0x%04x)\n", chipname, val);
+
+#ifdef CONFIG_MACH_U300_BS26
+ if ((val & 0xFF00U) != 0xc800) {
+ printk(KERN_ERR "Platform configured for BS25/BS26 " \
+ "with DB3150 but %s detected, expect problems!",
+ chipname);
+ }
+#endif
+#ifdef CONFIG_MACH_U300_BS330
+ if ((val & 0xFF00U) != 0xd800) {
+ printk(KERN_ERR "Platform configured for BS330 " \
+ "with DB3200 but %s detected, expect problems!",
+ chipname);
+ }
+#endif
+#ifdef CONFIG_MACH_U300_BS335
+ if ((val & 0xFF00U) != 0xf000 && (val & 0xFF00U) != 0xf100) {
+ printk(KERN_ERR "Platform configured for BS365 " \
+ " with DB3350 but %s detected, expect problems!",
+ chipname);
+ }
+#endif
+#ifdef CONFIG_MACH_U300_BS365
+ if ((val & 0xFF00U) != 0xe800) {
+ printk(KERN_ERR "Platform configured for BS365 " \
+ "with DB3210 but %s detected, expect problems!",
+ chipname);
+ }
+#endif
+
+
+}
+
+/*
+ * Some devices and their resources require reserved physical memory from
+ * the end of the available RAM. This function traverses the list of devices
+ * and assigns actual adresses to these.
+ */
+static void __init u300_assign_physmem(void)
+{
+ unsigned long curr_start = __pa(high_memory);
+ int i, j;
+
+ for (i = 0; i < ARRAY_SIZE(platform_devs); i++) {
+ for (j = 0; j < platform_devs[i]->num_resources; j++) {
+ struct resource *const res =
+ &platform_devs[i]->resource[j];
+
+ if (IORESOURCE_MEM == res->flags &&
+ 0 == res->start) {
+ res->start = curr_start;
+ res->end += curr_start;
+ curr_start += (res->end - res->start + 1);
+
+ printk(KERN_INFO "core.c: Mapping RAM " \
+ "%#x-%#x to device %s:%s\n",
+ res->start, res->end,
+ platform_devs[i]->name, res->name);
+ }
+ }
+ }
+}
+
+void __init u300_init_devices(void)
+{
+ int i;
+ u16 val;
+
+ /* Check what platform we run and print some status information */
+ u300_init_check_chip();
+
+ /* Set system to run at PLL208, max performance, a known state. */
+ val = readw(U300_SYSCON_VBASE + U300_SYSCON_CCR);
+ val &= ~U300_SYSCON_CCR_CLKING_PERFORMANCE_MASK;
+ writew(val, U300_SYSCON_VBASE + U300_SYSCON_CCR);
+ /* Wait for the PLL208 to lock if not locked in yet */
+ while (!(readw(U300_SYSCON_VBASE + U300_SYSCON_CSR) &
+ U300_SYSCON_CSR_PLL208_LOCK_IND));
+
+ /* Register the AMBA devices in the AMBA bus abstraction layer */
+ u300_clock_primecells();
+ for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
+ struct amba_device *d = amba_devs[i];
+ amba_device_register(d, &iomem_resource);
+ }
+ u300_unclock_primecells();
+
+ u300_assign_physmem();
+
+ /* Register the platform devices */
+ platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
+
+#ifndef CONFIG_MACH_U300_SEMI_IS_SHARED
+ /*
+ * Enable SEMI self refresh. Self-refresh of the SDRAM is entered when
+ * both subsystems are requesting this mode.
+ * If we not share the Acc SDRAM, this is never the case. Therefore
+ * enable it here from the App side.
+ */
+ val = readw(U300_SYSCON_VBASE + U300_SYSCON_SMCR) |
+ U300_SYSCON_SMCR_SEMI_SREFREQ_ENABLE;
+ writew(val, U300_SYSCON_VBASE + U300_SYSCON_SMCR);
+#endif /* CONFIG_MACH_U300_SEMI_IS_SHARED */
+}
+
+static int core_module_init(void)
+{
+ /*
+ * This needs to be initialized later: it needs the input framework
+ * to be initialized first.
+ */
+ return mmc_init(&mmcsd_device);
+}
+module_init(core_module_init);
diff --git a/arch/arm/mach-u300/include/mach/debug-macro.S b/arch/arm/mach-u300/include/mach/debug-macro.S
new file mode 100644
index 0000000..f3a1cbb
--- /dev/null
+++ b/arch/arm/mach-u300/include/mach/debug-macro.S
@@ -0,0 +1,22 @@
+/*
+ *
+ * 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>
diff --git a/arch/arm/mach-u300/include/mach/entry-macro.S b/arch/arm/mach-u300/include/mach/entry-macro.S
new file mode 100644
index 0000000..20731ae
--- /dev/null
+++ b/arch/arm/mach-u300/include/mach/entry-macro.S
@@ -0,0 +1,40 @@
+/*
+ *
+ * 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
diff --git a/arch/arm/mach-u300/include/mach/memory.h b/arch/arm/mach-u300/include/mach/memory.h
new file mode 100644
index 0000000..bf134bc
--- /dev/null
+++ b/arch/arm/mach-u300/include/mach/memory.h
@@ -0,0 +1,42 @@
+/*
+ *
+ * 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
diff --git a/arch/arm/mach-u300/include/mach/platform.h b/arch/arm/mach-u300/include/mach/platform.h
new file mode 100644
index 0000000..77d9210
--- /dev/null
+++ b/arch/arm/mach-u300/include/mach/platform.h
@@ -0,0 +1,19 @@
+/*
+ *
+ * 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
diff --git a/arch/arm/mach-u300/include/mach/system.h b/arch/arm/mach-u300/include/mach/system.h
new file mode 100644
index 0000000..8daf136
--- /dev/null
+++ b/arch/arm/mach-u300/include/mach/system.h
@@ -0,0 +1,42 @@
+/*
+ *
+ * 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);
+}
diff --git a/arch/arm/mach-u300/include/mach/timex.h b/arch/arm/mach-u300/include/mach/timex.h
new file mode 100644
index 0000000..f233b72
--- /dev/null
+++ b/arch/arm/mach-u300/include/mach/timex.h
@@ -0,0 +1,17 @@
+/*
+ *
+ * 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
diff --git a/arch/arm/mach-u300/include/mach/uncompress.h b/arch/arm/mach-u300/include/mach/uncompress.h
new file mode 100644
index 0000000..29acb71
--- /dev/null
+++ b/arch/arm/mach-u300/include/mach/uncompress.h
@@ -0,0 +1,46 @@
+/*
+ * 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()
diff --git a/arch/arm/mach-u300/include/mach/vmalloc.h b/arch/arm/mach-u300/include/mach/vmalloc.h
new file mode 100644
index 0000000..b00c51a
--- /dev/null
+++ b/arch/arm/mach-u300/include/mach/vmalloc.h
@@ -0,0 +1,12 @@
+/*
+ *
+ * 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
diff --git a/arch/arm/mach-u300/mmc.c b/arch/arm/mach-u300/mmc.c
new file mode 100644
index 0000000..3138d39
--- /dev/null
+++ b/arch/arm/mach-u300/mmc.c
@@ -0,0 +1,216 @@
+/*
+ *
+ * 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;
+}
diff --git a/arch/arm/mach-u300/mmc.h b/arch/arm/mach-u300/mmc.h
new file mode 100644
index 0000000..92b8512
--- /dev/null
+++ b/arch/arm/mach-u300/mmc.h
@@ -0,0 +1,18 @@
+/*
+ *
+ * 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
diff --git a/arch/arm/mach-u300/timer.c b/arch/arm/mach-u300/timer.c
new file mode 100644
index 0000000..57b5351
--- /dev/null
+++ b/arch/arm/mach-u300/timer.c
@@ -0,0 +1,422 @@
+/*
+ *
+ * arch/arm/mach-u300/timer.c
+ *
+ *
+ * Copyright (C) 2007-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * Timer COH 901 328, runs the OS timer interrupt.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+#include <linux/interrupt.h>
+#include <linux/time.h>
+#include <linux/timex.h>
+#include <linux/clockchips.h>
+#include <linux/clocksource.h>
+#include <linux/types.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+
+/* Generic stuff */
+#include <asm/mach/map.h>
+#include <asm/mach/time.h>
+#include <asm/mach/irq.h>
+
+#include "clock.h"
+
+/*
+ * APP side special timer registers
+ * This timer contains four timers which can fire an interrupt each.
+ * OS (operating system) timer @ 32768 Hz
+ * DD (device driver) timer @ 1 kHz
+ * GP1 (general purpose 1) timer @ 1MHz
+ * GP2 (general purpose 2) timer @ 1MHz
+ */
+
+/* Reset OS Timer 32bit (-/W) */
+#define U300_TIMER_APP_ROST (0x0000)
+#define U300_TIMER_APP_ROST_TIMER_RESET (0x00000000)
+/* Enable OS Timer 32bit (-/W) */
+#define U300_TIMER_APP_EOST (0x0004)
+#define U300_TIMER_APP_EOST_TIMER_ENABLE (0x00000000)
+/* Disable OS Timer 32bit (-/W) */
+#define U300_TIMER_APP_DOST (0x0008)
+#define U300_TIMER_APP_DOST_TIMER_DISABLE (0x00000000)
+/* OS Timer Mode Register 32bit (-/W) */
+#define U300_TIMER_APP_SOSTM (0x000c)
+#define U300_TIMER_APP_SOSTM_MODE_CONTINUOUS (0x00000000)
+#define U300_TIMER_APP_SOSTM_MODE_ONE_SHOT (0x00000001)
+/* OS Timer Status Register 32bit (R/-) */
+#define U300_TIMER_APP_OSTS (0x0010)
+#define U300_TIMER_APP_OSTS_TIMER_STATE_MASK (0x0000000F)
+#define U300_TIMER_APP_OSTS_TIMER_STATE_IDLE (0x00000001)
+#define U300_TIMER_APP_OSTS_TIMER_STATE_ACTIVE (0x00000002)
+#define U300_TIMER_APP_OSTS_ENABLE_IND (0x00000010)
+#define U300_TIMER_APP_OSTS_MODE_MASK (0x00000020)
+#define U300_TIMER_APP_OSTS_MODE_CONTINUOUS (0x00000000)
+#define U300_TIMER_APP_OSTS_MODE_ONE_SHOT (0x00000020)
+#define U300_TIMER_APP_OSTS_IRQ_ENABLED_IND (0x00000040)
+#define U300_TIMER_APP_OSTS_IRQ_PENDING_IND (0x00000080)
+/* OS Timer Current Count Register 32bit (R/-) */
+#define U300_TIMER_APP_OSTCC (0x0014)
+/* OS Timer Terminal Count Register 32bit (R/W) */
+#define U300_TIMER_APP_OSTTC (0x0018)
+/* OS Timer Interrupt Enable Register 32bit (-/W) */
+#define U300_TIMER_APP_OSTIE (0x001c)
+#define U300_TIMER_APP_OSTIE_IRQ_DISABLE (0x00000000)
+#define U300_TIMER_APP_OSTIE_IRQ_ENABLE (0x00000001)
+/* OS Timer Interrupt Acknowledge Register 32bit (-/W) */
+#define U300_TIMER_APP_OSTIA (0x0020)
+#define U300_TIMER_APP_OSTIA_IRQ_ACK (0x00000080)
+
+/* Reset DD Timer 32bit (-/W) */
+#define U300_TIMER_APP_RDDT (0x0040)
+#define U300_TIMER_APP_RDDT_TIMER_RESET (0x00000000)
+/* Enable DD Timer 32bit (-/W) */
+#define U300_TIMER_APP_EDDT (0x0044)
+#define U300_TIMER_APP_EDDT_TIMER_ENABLE (0x00000000)
+/* Disable DD Timer 32bit (-/W) */
+#define U300_TIMER_APP_DDDT (0x0048)
+#define U300_TIMER_APP_DDDT_TIMER_DISABLE (0x00000000)
+/* DD Timer Mode Register 32bit (-/W) */
+#define U300_TIMER_APP_SDDTM (0x004c)
+#define U300_TIMER_APP_SDDTM_MODE_CONTINUOUS (0x00000000)
+#define U300_TIMER_APP_SDDTM_MODE_ONE_SHOT (0x00000001)
+/* DD Timer Status Register 32bit (R/-) */
+#define U300_TIMER_APP_DDTS (0x0050)
+#define U300_TIMER_APP_DDTS_TIMER_STATE_MASK (0x0000000F)
+#define U300_TIMER_APP_DDTS_TIMER_STATE_IDLE (0x00000001)
+#define U300_TIMER_APP_DDTS_TIMER_STATE_ACTIVE (0x00000002)
+#define U300_TIMER_APP_DDTS_ENABLE_IND (0x00000010)
+#define U300_TIMER_APP_DDTS_MODE_MASK (0x00000020)
+#define U300_TIMER_APP_DDTS_MODE_CONTINUOUS (0x00000000)
+#define U300_TIMER_APP_DDTS_MODE_ONE_SHOT (0x00000020)
+#define U300_TIMER_APP_DDTS_IRQ_ENABLED_IND (0x00000040)
+#define U300_TIMER_APP_DDTS_IRQ_PENDING_IND (0x00000080)
+/* DD Timer Current Count Register 32bit (R/-) */
+#define U300_TIMER_APP_DDTCC (0x0054)
+/* DD Timer Terminal Count Register 32bit (R/W) */
+#define U300_TIMER_APP_DDTTC (0x0058)
+/* DD Timer Interrupt Enable Register 32bit (-/W) */
+#define U300_TIMER_APP_DDTIE (0x005c)
+#define U300_TIMER_APP_DDTIE_IRQ_DISABLE (0x00000000)
+#define U300_TIMER_APP_DDTIE_IRQ_ENABLE (0x00000001)
+/* DD Timer Interrupt Acknowledge Register 32bit (-/W) */
+#define U300_TIMER_APP_DDTIA (0x0060)
+#define U300_TIMER_APP_DDTIA_IRQ_ACK (0x00000080)
+
+/* Reset GP1 Timer 32bit (-/W) */
+#define U300_TIMER_APP_RGPT1 (0x0080)
+#define U300_TIMER_APP_RGPT1_TIMER_RESET (0x00000000)
+/* Enable GP1 Timer 32bit (-/W) */
+#define U300_TIMER_APP_EGPT1 (0x0084)
+#define U300_TIMER_APP_EGPT1_TIMER_ENABLE (0x00000000)
+/* Disable GP1 Timer 32bit (-/W) */
+#define U300_TIMER_APP_DGPT1 (0x0088)
+#define U300_TIMER_APP_DGPT1_TIMER_DISABLE (0x00000000)
+/* GP1 Timer Mode Register 32bit (-/W) */
+#define U300_TIMER_APP_SGPT1M (0x008c)
+#define U300_TIMER_APP_SGPT1M_MODE_CONTINUOUS (0x00000000)
+#define U300_TIMER_APP_SGPT1M_MODE_ONE_SHOT (0x00000001)
+/* GP1 Timer Status Register 32bit (R/-) */
+#define U300_TIMER_APP_GPT1S (0x0090)
+#define U300_TIMER_APP_GPT1S_TIMER_STATE_MASK (0x0000000F)
+#define U300_TIMER_APP_GPT1S_TIMER_STATE_IDLE (0x00000001)
+#define U300_TIMER_APP_GPT1S_TIMER_STATE_ACTIVE (0x00000002)
+#define U300_TIMER_APP_GPT1S_ENABLE_IND (0x00000010)
+#define U300_TIMER_APP_GPT1S_MODE_MASK (0x00000020)
+#define U300_TIMER_APP_GPT1S_MODE_CONTINUOUS (0x00000000)
+#define U300_TIMER_APP_GPT1S_MODE_ONE_SHOT (0x00000020)
+#define U300_TIMER_APP_GPT1S_IRQ_ENABLED_IND (0x00000040)
+#define U300_TIMER_APP_GPT1S_IRQ_PENDING_IND (0x00000080)
+/* GP1 Timer Current Count Register 32bit (R/-) */
+#define U300_TIMER_APP_GPT1CC (0x0094)
+/* GP1 Timer Terminal Count Register 32bit (R/W) */
+#define U300_TIMER_APP_GPT1TC (0x0098)
+/* GP1 Timer Interrupt Enable Register 32bit (-/W) */
+#define U300_TIMER_APP_GPT1IE (0x009c)
+#define U300_TIMER_APP_GPT1IE_IRQ_DISABLE (0x00000000)
+#define U300_TIMER_APP_GPT1IE_IRQ_ENABLE (0x00000001)
+/* GP1 Timer Interrupt Acknowledge Register 32bit (-/W) */
+#define U300_TIMER_APP_GPT1IA (0x00a0)
+#define U300_TIMER_APP_GPT1IA_IRQ_ACK (0x00000080)
+
+/* Reset GP2 Timer 32bit (-/W) */
+#define U300_TIMER_APP_RGPT2 (0x00c0)
+#define U300_TIMER_APP_RGPT2_TIMER_RESET (0x00000000)
+/* Enable GP2 Timer 32bit (-/W) */
+#define U300_TIMER_APP_EGPT2 (0x00c4)
+#define U300_TIMER_APP_EGPT2_TIMER_ENABLE (0x00000000)
+/* Disable GP2 Timer 32bit (-/W) */
+#define U300_TIMER_APP_DGPT2 (0x00c8)
+#define U300_TIMER_APP_DGPT2_TIMER_DISABLE (0x00000000)
+/* GP2 Timer Mode Register 32bit (-/W) */
+#define U300_TIMER_APP_SGPT2M (0x00cc)
+#define U300_TIMER_APP_SGPT2M_MODE_CONTINUOUS (0x00000000)
+#define U300_TIMER_APP_SGPT2M_MODE_ONE_SHOT (0x00000001)
+/* GP2 Timer Status Register 32bit (R/-) */
+#define U300_TIMER_APP_GPT2S (0x00d0)
+#define U300_TIMER_APP_GPT2S_TIMER_STATE_MASK (0x0000000F)
+#define U300_TIMER_APP_GPT2S_TIMER_STATE_IDLE (0x00000001)
+#define U300_TIMER_APP_GPT2S_TIMER_STATE_ACTIVE (0x00000002)
+#define U300_TIMER_APP_GPT2S_ENABLE_IND (0x00000010)
+#define U300_TIMER_APP_GPT2S_MODE_MASK (0x00000020)
+#define U300_TIMER_APP_GPT2S_MODE_CONTINUOUS (0x00000000)
+#define U300_TIMER_APP_GPT2S_MODE_ONE_SHOT (0x00000020)
+#define U300_TIMER_APP_GPT2S_IRQ_ENABLED_IND (0x00000040)
+#define U300_TIMER_APP_GPT2S_IRQ_PENDING_IND (0x00000080)
+/* GP2 Timer Current Count Register 32bit (R/-) */
+#define U300_TIMER_APP_GPT2CC (0x00d4)
+/* GP2 Timer Terminal Count Register 32bit (R/W) */
+#define U300_TIMER_APP_GPT2TC (0x00d8)
+/* GP2 Timer Interrupt Enable Register 32bit (-/W) */
+#define U300_TIMER_APP_GPT2IE (0x00dc)
+#define U300_TIMER_APP_GPT2IE_IRQ_DISABLE (0x00000000)
+#define U300_TIMER_APP_GPT2IE_IRQ_ENABLE (0x00000001)
+/* GP2 Timer Interrupt Acknowledge Register 32bit (-/W) */
+#define U300_TIMER_APP_GPT2IA (0x00e0)
+#define U300_TIMER_APP_GPT2IA_IRQ_ACK (0x00000080)
+
+/* Clock request control register - all four timers */
+#define U300_TIMER_APP_CRC (0x100)
+#define U300_TIMER_APP_CRC_CLOCK_REQUEST_ENABLE (0x00000001)
+
+#define TICKS_PER_JIFFY ((CLOCK_TICK_RATE + (HZ/2)) / HZ)
+#define US_PER_TICK ((1000000 + (HZ/2)) / HZ)
+
+/*
+ * The u300_set_mode() function is always called first, if we
+ * have oneshot timer active, the oneshot scheduling function
+ * u300_set_next_event() is called immediately after.
+ */
+static void u300_set_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+ switch (mode) {
+ case CLOCK_EVT_MODE_PERIODIC:
+ /* Disable interrupts on GPT1 */
+ writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT1IE);
+ /* Disable GP1 while we're reprogramming it. */
+ writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_DGPT1);
+ /*
+ * Set the periodic mode to a certain number of ticks per
+ * jiffy.
+ */
+ writel(TICKS_PER_JIFFY,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT1TC);
+ /*
+ * Set continuous mode, so the timer keeps triggering
+ * interrupts.
+ */
+ writel(U300_TIMER_APP_SGPT1M_MODE_CONTINUOUS,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_SGPT1M);
+ /* Enable timer interrupts */
+ writel(U300_TIMER_APP_GPT1IE_IRQ_ENABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT1IE);
+ /* Then enable the OS timer again */
+ writel(U300_TIMER_APP_EGPT1_TIMER_ENABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_EGPT1);
+ break;
+ case CLOCK_EVT_MODE_ONESHOT:
+ /* Just break; here? */
+ /*
+ * The actual event will be programmed by the next event hook,
+ * so we just set a dummy value somewhere at the end of the
+ * universe here.
+ */
+ /* Disable interrupts on GPT1 */
+ writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT1IE);
+ /* Disable GP1 while we're reprogramming it. */
+ writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_DGPT1);
+ /*
+ * Expire far in the future, u300_set_next_event() will be
+ * called soon...
+ */
+ writel(0xFFFFFFFF, U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT1TC);
+ /* We run one shot per tick here! */
+ writel(U300_TIMER_APP_SGPT1M_MODE_ONE_SHOT,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_SGPT1M);
+ /* Enable interrupts for this timer */
+ writel(U300_TIMER_APP_GPT1IE_IRQ_ENABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT1IE);
+ /* Enable timer */
+ writel(U300_TIMER_APP_EGPT1_TIMER_ENABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_EGPT1);
+ break;
+ case CLOCK_EVT_MODE_UNUSED:
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ /* Disable interrupts on GP1 */
+ writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT1IE);
+ /* Disable GP1 */
+ writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_DGPT1);
+ break;
+ case CLOCK_EVT_MODE_RESUME:
+ /* Ignore this call */
+ break;
+ }
+}
+
+/*
+ * The app timer in one shot mode obviously has to be reprogrammed
+ * in EXACTLY this sequence to work properly. Do NOT try to e.g. replace
+ * the interrupt disable + timer disable commands with a reset command,
+ * it will fail miserably. Apparently (and I found this the hard way)
+ * the timer is very sensitive to the instruction order, though you don't
+ * get that impression from the data sheet.
+ */
+static int u300_set_next_event(unsigned long cycles,
+ struct clock_event_device *evt)
+
+{
+ /* Disable interrupts on GPT1 */
+ writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT1IE);
+ /* Disable GP1 while we're reprogramming it. */
+ writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_DGPT1);
+ /* Reset the General Purpose timer 1. */
+ writel(U300_TIMER_APP_RGPT1_TIMER_RESET,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_RGPT1);
+ /* IRQ in n * cycles */
+ writel(cycles, U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT1TC);
+ /*
+ * We run one shot per tick here! (This is necessary to reconfigure,
+ * the timer will tilt if you don't!)
+ */
+ writel(U300_TIMER_APP_SGPT1M_MODE_ONE_SHOT,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_SGPT1M);
+ /* Enable timer interrupts */
+ writel(U300_TIMER_APP_GPT1IE_IRQ_ENABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT1IE);
+ /* Then enable the OS timer again */
+ writel(U300_TIMER_APP_EGPT1_TIMER_ENABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_EGPT1);
+ return 0;
+}
+
+
+/* Use general purpose timer 1 as clock event */
+static struct clock_event_device clockevent_u300_1mhz = {
+ .name = "GPT1",
+ .rating = 300, /* Reasonably fast and accurate clock event */
+ .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+ /* 22 calculated using the algorithm in arch/mips/kernel/time.c */
+ .shift = 22,
+ .set_next_event = u300_set_next_event,
+ .set_mode = u300_set_mode,
+};
+
+/* Clock event timer interrupt handler */
+static irqreturn_t u300_timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *evt = &clockevent_u300_1mhz;
+ /* ACK/Clear timer IRQ for the APP GPT1 Timer */
+ writel(U300_TIMER_APP_GPT1IA_IRQ_ACK,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT1IA);
+ evt->event_handler(evt);
+ return IRQ_HANDLED;
+}
+
+static struct irqaction u300_timer_irq = {
+ .name = "U300 Timer Tick",
+ .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+ .handler = u300_timer_interrupt,
+};
+
+/* Use general purpose timer 2 as clock source */
+static cycle_t u300_get_cycles(void)
+{
+ return (cycles_t) readl(U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT2CC);
+}
+
+static struct clocksource clocksource_u300_1mhz = {
+ .name = "GPT2",
+ .rating = 300, /* Reasonably fast and accurate clock source */
+ .read = u300_get_cycles,
+ .mask = CLOCKSOURCE_MASK(32), /* 32 bits */
+ /* 22 calculated using the algorithm in arch/mips/kernel/time.c */
+ .shift = 22,
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+
+/*
+ * This sets up the system timers, clock source and clock event.
+ */
+static void __init u300_timer_init(void)
+{
+ u300_enable_timer_clock();
+ /*
+ * Disable the "OS" and "DD" timers - these are designed for Symbian!
+ * Example usage in cnh1601578 cpu subsystem pd_timer_app.c
+ */
+ writel(U300_TIMER_APP_CRC_CLOCK_REQUEST_ENABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_CRC);
+ writel(U300_TIMER_APP_ROST_TIMER_RESET,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_ROST);
+ writel(U300_TIMER_APP_DOST_TIMER_DISABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_DOST);
+ writel(U300_TIMER_APP_RDDT_TIMER_RESET,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_RDDT);
+ writel(U300_TIMER_APP_DDDT_TIMER_DISABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_DDDT);
+
+ /* Reset the General Purpose timer 1. */
+ writel(U300_TIMER_APP_RGPT1_TIMER_RESET,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_RGPT1);
+
+ /* Set up the IRQ handler */
+ setup_irq(IRQ_U300_TIMER_APP_GP1, &u300_timer_irq);
+
+ /* Reset the General Purpose timer 2 */
+ writel(U300_TIMER_APP_RGPT2_TIMER_RESET,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_RGPT2);
+ /* Set this timer to run around forever */
+ writel(0xFFFFFFFFU, U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT2TC);
+ /* Set continuous mode so it wraps around */
+ writel(U300_TIMER_APP_SGPT2M_MODE_CONTINUOUS,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_SGPT2M);
+ /* Disable timer interrupts */
+ writel(U300_TIMER_APP_GPT2IE_IRQ_DISABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT2IE);
+ /* Then enable the GP2 timer to use as a free running us counter */
+ writel(U300_TIMER_APP_EGPT2_TIMER_ENABLE,
+ U300_TIMER_APP_VBASE + U300_TIMER_APP_EGPT2);
+
+ /* This is a pure microsecond clock source */
+ clocksource_u300_1mhz.mult =
+ clocksource_khz2mult(1000, clocksource_u300_1mhz.shift);
+ if (clocksource_register(&clocksource_u300_1mhz))
+ printk(KERN_ERR "timer: failed to initialize clock "
+ "source %s\n", clocksource_u300_1mhz.name);
+
+ clockevent_u300_1mhz.mult =
+ div_sc(1000000, NSEC_PER_SEC, clockevent_u300_1mhz.shift);
+ /* 32bit counter, so 32bits delta is max */
+ clockevent_u300_1mhz.max_delta_ns =
+ clockevent_delta2ns(0xffffffff, &clockevent_u300_1mhz);
+ /* This timer is slow enough to set for 1 cycle == 1 MHz */
+ clockevent_u300_1mhz.min_delta_ns =
+ clockevent_delta2ns(1, &clockevent_u300_1mhz);
+ clockevent_u300_1mhz.cpumask = cpumask_of(0);
+ clockevents_register_device(&clockevent_u300_1mhz);
+ /*
+ * TODO: init and register the rest of the timers too, they can be
+ * used by hrtimers!
+ */
+}
+
+/*
+ * Very simple system timer that only register the clock event and
+ * clock source.
+ */
+struct sys_timer u300_timer = {
+ .init = u300_timer_init,
+};
diff --git a/arch/arm/mach-u300/u300.c b/arch/arm/mach-u300/u300.c
new file mode 100644
index 0000000..d2a0b88
--- /dev/null
+++ b/arch/arm/mach-u300/u300.c
@@ -0,0 +1,55 @@
+/*
+ *
+ * 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