machine-$(CONFIG_ARCH_S3C64XX) := s3c6400 s3c6410
machine-$(CONFIG_ARCH_SA1100) := sa1100
machine-$(CONFIG_ARCH_SHARK) := shark
+machine-$(CONFIG_ARCH_STMP378X) := stmp378x
+machine-$(CONFIG_ARCH_STMP37XX) := stmp37xx
+ machine-$(CONFIG_ARCH_U300) := u300
machine-$(CONFIG_ARCH_VERSATILE) := versatile
machine-$(CONFIG_ARCH_W90X900) := w90x900
machine-$(CONFIG_FOOTBRIDGE) := footbridge
--- /dev/null
- vic_init((void __iomem *) U300_INTCON0_VBASE, 0, mask[0]);
- vic_init((void __iomem *) U300_INTCON1_VBASE, 32, mask[1]);
+ /*
+ *
+ * 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], 0);
++ vic_init((void __iomem *) U300_INTCON1_VBASE, 32, mask[1], 0);
+ }
+
+
+ /*
+ * 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);
--- /dev/null
-static cycle_t u300_get_cycles(void)
+ /*
+ *
+ * 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(struct clocksource *cs)
+ {
+ 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,
+ };
projects / platform / kernel / kernel-mfld-blackbay.git / commitdiff