Initial file dump from open source releaseHEADmaster

1 files changed, 700 insertions, 0 deletions

diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c
new file mode 100644
index 00000000..a683d17b
--- /dev/null
+++ b/arch/arm/mach-u300/core.c
@@ -0,0 +1,700 @@
+/*
+ *
+ * arch/arm/mach-u300/core.c
+ *
+ *
+ * Copyright (C) 2007-2012 ST-Ericsson SA
+ * 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/dmaengine.h>
+#include <linux/amba/bus.h>
+#include <linux/amba/mmci.h>
+#include <linux/amba/serial.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/fsmc.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_data/clk-u300.h>
+#include <linux/platform_data/pinctrl-coh901.h>
+#include <linux/platform_data/dma-coh901318.h>
+#include <linux/irqchip/arm-vic.h>
+
+#include <asm/types.h>
+#include <asm/setup.h>
+#include <asm/memory.h>
+#include <asm/mach/map.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+
+#include <mach/hardware.h>
+#include <mach/syscon.h>
+#include <mach/irqs.h>
+
+#include "timer.h"
+#include "spi.h"
+#include "i2c.h"
+#include "u300-gpio.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,
+	},
+};
+
+static 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_pl011_data uart0_plat_data = {
+#ifdef CONFIG_COH901318
+	.dma_filter = coh901318_filter_id,
+	.dma_rx_param = (void *) U300_DMA_UART0_RX,
+	.dma_tx_param = (void *) U300_DMA_UART0_TX,
+#endif
+};
+
+/* Slow device at 0x3000 offset */
+static AMBA_APB_DEVICE(uart0, "uart0", 0, U300_UART0_BASE,
+	{ IRQ_U300_UART0 }, &uart0_plat_data);
+
+/* The U335 have an additional UART1 on the APP CPU */
+static struct amba_pl011_data uart1_plat_data = {
+#ifdef CONFIG_COH901318
+	.dma_filter = coh901318_filter_id,
+	.dma_rx_param = (void *) U300_DMA_UART1_RX,
+	.dma_tx_param = (void *) U300_DMA_UART1_TX,
+#endif
+};
+
+/* Fast device at 0x7000 offset */
+static AMBA_APB_DEVICE(uart1, "uart1", 0, U300_UART1_BASE,
+	{ IRQ_U300_UART1 }, &uart1_plat_data);
+
+/* AHB device at 0x4000 offset */
+static AMBA_APB_DEVICE(pl172, "pl172", 0, U300_EMIF_CFG_BASE, { }, NULL);
+
+/* Fast device at 0x6000 offset */
+static AMBA_APB_DEVICE(pl022, "pl022", 0, U300_SPI_BASE,
+	{ IRQ_U300_SPI }, NULL);
+
+/* Fast device at 0x1000 offset */
+#define U300_MMCSD_IRQS	{ IRQ_U300_MMCSD_MCIINTR0, IRQ_U300_MMCSD_MCIINTR1 }
+
+static struct mmci_platform_data mmcsd_platform_data = {
+	/*
+	 * Do not set ocr_mask or voltage translation function,
+	 * we have a regulator we can control instead.
+	 */
+	.f_max = 24000000,
+	.gpio_wp = -1,
+	.gpio_cd = U300_GPIO_PIN_MMC_CD,
+	.cd_invert = true,
+	.capabilities = MMC_CAP_MMC_HIGHSPEED |
+	MMC_CAP_SD_HIGHSPEED | MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA,
+#ifdef CONFIG_COH901318
+	.dma_filter = coh901318_filter_id,
+	.dma_rx_param = (void *) U300_DMA_MMCSD_RX_TX,
+	/* Don't specify a TX channel, this RX channel is bidirectional */
+#endif
+};
+
+static AMBA_APB_DEVICE(mmcsd, "mmci", 0, U300_MMCSD_BASE,
+	U300_MMCSD_IRQS, &mmcsd_platform_data);
+
+/*
+ * 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,
+	&uart1_device,
+	&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,
+	},
+	{
+		.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,
+	},
+	{
+		.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,
+	},
+};
+
+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[] = {
+	{
+		.name  = "nand_addr",
+		.start = U300_NAND_CS0_PHYS_BASE + PLAT_NAND_ALE,
+		.end   = U300_NAND_CS0_PHYS_BASE + PLAT_NAND_ALE + SZ_16K - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	{
+		.name  = "nand_cmd",
+		.start = U300_NAND_CS0_PHYS_BASE + PLAT_NAND_CLE,
+		.end   = U300_NAND_CS0_PHYS_BASE + PLAT_NAND_CLE + SZ_16K - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	{
+		.name  = "nand_data",
+		.start = U300_NAND_CS0_PHYS_BASE,
+		.end   = U300_NAND_CS0_PHYS_BASE + SZ_16K - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	{
+		.name  = "fsmc_regs",
+		.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,
+	}
+};
+
+static struct resource dma_resource[] = {
+	{
+		.start = U300_DMAC_BASE,
+		.end = U300_DMAC_BASE + PAGE_SIZE - 1,
+		.flags =  IORESOURCE_MEM,
+	},
+	{
+		.start = IRQ_U300_DMA,
+		.end = IRQ_U300_DMA,
+		.flags =  IORESOURCE_IRQ,
+	}
+};
+
+
+static struct resource pinctrl_resources[] = {
+	{
+		.start = U300_SYSCON_BASE,
+		.end   = U300_SYSCON_BASE + SZ_4K - 1,
+		.flags = IORESOURCE_MEM,
+	},
+};
+
+static struct platform_device wdog_device = {
+	.name = "coh901327_wdog",
+	.id = -1,
+	.num_resources = ARRAY_SIZE(wdog_resources),
+	.resource = wdog_resources,
+};
+
+static struct platform_device i2c0_device = {
+	.name = "stu300",
+	.id = 0,
+	.num_resources = ARRAY_SIZE(i2c0_resources),
+	.resource = i2c0_resources,
+};
+
+static struct platform_device i2c1_device = {
+	.name = "stu300",
+	.id = 1,
+	.num_resources = ARRAY_SIZE(i2c1_resources),
+	.resource = i2c1_resources,
+};
+
+static struct platform_device pinctrl_device = {
+	.name = "pinctrl-u300",
+	.id = -1,
+	.num_resources = ARRAY_SIZE(pinctrl_resources),
+	.resource = pinctrl_resources,
+};
+
+/*
+ * The different variants have a few different versions of the
+ * GPIO block, with different number of ports.
+ */
+static struct u300_gpio_platform u300_gpio_plat = {
+	.ports = 7,
+	.gpio_base = 0,
+};
+
+static struct platform_device gpio_device = {
+	.name = "u300-gpio",
+	.id = -1,
+	.num_resources = ARRAY_SIZE(gpio_resources),
+	.resource = gpio_resources,
+	.dev = {
+		.platform_data = &u300_gpio_plat,
+	},
+};
+
+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 = "rtc-coh901331",
+	.id = -1,
+	.num_resources = ARRAY_SIZE(rtc_resources),
+	.resource = rtc_resources,
+};
+
+static struct mtd_partition u300_partitions[] = {
+	{
+		.name = "bootrecords",
+		.offset = 0,
+		.size = SZ_128K,
+	},
+	{
+		.name = "free",
+		.offset = SZ_128K,
+		.size = 8064 * SZ_1K,
+	},
+	{
+		.name = "platform",
+		.offset = 8192 * SZ_1K,
+		.size = 253952 * SZ_1K,
+	},
+};
+
+static struct fsmc_nand_platform_data nand_platform_data = {
+	.partitions = u300_partitions,
+	.nr_partitions = ARRAY_SIZE(u300_partitions),
+	.options = NAND_SKIP_BBTSCAN,
+	.width = FSMC_NAND_BW8,
+};
+
+static struct platform_device nand_device = {
+	.name = "fsmc-nand",
+	.id = -1,
+	.resource = fsmc_resources,
+	.num_resources = ARRAY_SIZE(fsmc_resources),
+	.dev = {
+		.platform_data = &nand_platform_data,
+	},
+};
+
+static struct platform_device dma_device = {
+	.name		= "coh901318",
+	.id		= -1,
+	.resource	= dma_resource,
+	.num_resources  = ARRAY_SIZE(dma_resource),
+	.dev = {
+		.coherent_dma_mask = ~0,
+	},
+};
+
+static unsigned long pin_pullup_conf[] = {
+	PIN_CONF_PACKED(PIN_CONFIG_BIAS_PULL_UP, 1),
+};
+
+static unsigned long pin_highz_conf[] = {
+	PIN_CONF_PACKED(PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0),
+};
+
+/* Pin control settings */
+static struct pinctrl_map __initdata u300_pinmux_map[] = {
+	/* anonymous maps for chip power and EMIFs */
+	PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "power"),
+	PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "emif0"),
+	PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "emif1"),
+	/* per-device maps for MMC/SD, SPI and UART */
+	PIN_MAP_MUX_GROUP_DEFAULT("mmci",  "pinctrl-u300", NULL, "mmc0"),
+	PIN_MAP_MUX_GROUP_DEFAULT("pl022", "pinctrl-u300", NULL, "spi0"),
+	PIN_MAP_MUX_GROUP_DEFAULT("uart0", "pinctrl-u300", NULL, "uart0"),
+	/* This pin is used for clock return rather than GPIO */
+	PIN_MAP_CONFIGS_PIN_DEFAULT("mmci", "pinctrl-u300", "PIO APP GPIO 11",
+				    pin_pullup_conf),
+	/* This pin is used for card detect */
+	PIN_MAP_CONFIGS_PIN_DEFAULT("mmci", "pinctrl-u300", "PIO MS INS",
+				    pin_highz_conf),
+};
+
+/*
+ * Notice that AMBA devices are initialized before platform devices.
+ *
+ */
+static struct platform_device *platform_devs[] __initdata = {
+	&dma_device,
+	&i2c0_device,
+	&i2c1_device,
+	&keypad_device,
+	&rtc_device,
+	&pinctrl_device,
+	&gpio_device,
+	&nand_device,
+	&wdog_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.
+ */
+static void __init u300_init_irq(void)
+{
+	u32 mask[2] = {0, 0};
+	struct clk *clk;
+	int i;
+
+	/* initialize clocking early, we want to clock the INTCON */
+	u300_clk_init(U300_SYSCON_VBASE);
+
+	/* Bootstrap EMIF and SEMI clocks */
+	clk = clk_get_sys("pl172", NULL);
+	BUG_ON(IS_ERR(clk));
+	clk_prepare_enable(clk);
+	clk = clk_get_sys("semi", NULL);
+	BUG_ON(IS_ERR(clk));
+	clk_prepare_enable(clk);
+
+	/* Clock the interrupt controller */
+	clk = clk_get_sys("intcon", NULL);
+	BUG_ON(IS_ERR(clk));
+	clk_prepare_enable(clk);
+
+	for (i = 0; i < U300_VIC_IRQS_END; i++)
+		set_bit(i, (unsigned long *) &mask[0]);
+	vic_init((void __iomem *) U300_INTCON0_VBASE, IRQ_U300_INTCON0_START,
+		 mask[0], mask[0]);
+	vic_init((void __iomem *) U300_INTCON1_VBASE, IRQ_U300_INTCON1_START,
+		 mask[1], 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 __init 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);
+
+	if ((val & 0xFF00U) != 0xf000 && (val & 0xFF00U) != 0xf100) {
+		printk(KERN_ERR "Platform configured for BS335 " \
+		       " with DB3350 but %s detected, expect problems!",
+		       chipname);
+	}
+}
+
+/*
+ * 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 addresses 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 += resource_size(res);
+
+				printk(KERN_INFO "core.c: Mapping RAM " \
+				       "%#x-%#x to device %s:%s\n",
+					res->start, res->end,
+				       platform_devs[i]->name, res->name);
+			}
+		}
+	}
+}
+
+static void __init u300_init_machine(void)
+{
+	int i;
+	u16 val;
+
+	/* Check what platform we run and print some status information */
+	u300_init_check_chip();
+
+	/* Initialize SPI device with some board specifics */
+	u300_spi_init(&pl022_device);
+
+	/* Register the AMBA devices in the AMBA bus abstraction layer */
+	for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
+		struct amba_device *d = amba_devs[i];
+		amba_device_register(d, &iomem_resource);
+	}
+
+	u300_assign_physmem();
+
+	/* Initialize pinmuxing */
+	pinctrl_register_mappings(u300_pinmux_map,
+				  ARRAY_SIZE(u300_pinmux_map));
+
+	/* Register subdevices on the I2C buses */
+	u300_i2c_register_board_devices();
+
+	/* Register the platform devices */
+	platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
+
+	/* Register subdevices on the SPI bus */
+	u300_spi_register_board_devices();
+
+	/* Enable SEMI self refresh */
+	val = readw(U300_SYSCON_VBASE + U300_SYSCON_SMCR) |
+		U300_SYSCON_SMCR_SEMI_SREFREQ_ENABLE;
+	writew(val, U300_SYSCON_VBASE + U300_SYSCON_SMCR);
+}
+
+/* Forward declare this function from the watchdog */
+void coh901327_watchdog_reset(void);
+
+static void u300_restart(char mode, const char *cmd)
+{
+	switch (mode) {
+	case 's':
+	case 'h':
+#ifdef CONFIG_COH901327_WATCHDOG
+		coh901327_watchdog_reset();
+#endif
+		break;
+	default:
+		/* Do nothing */
+		break;
+	}
+	/* Wait for system do die/reset. */
+	while (1);
+}
+
+MACHINE_START(U300, "Ericsson AB U335 S335/B335 Prototype Board")
+	/* Maintainer: Linus Walleij <linus.walleij@stericsson.com> */
+	.atag_offset	= 0x100,
+	.map_io		= u300_map_io,
+	.nr_irqs	= 0,
+	.init_irq	= u300_init_irq,
+	.init_time	= u300_timer_init,
+	.init_machine	= u300_init_machine,
+	.restart	= u300_restart,
+MACHINE_END