Initial file dump from open source releaseHEADmaster

1 files changed, 529 insertions, 0 deletions

diff --git a/arch/arm/mach-integrator/integrator_cp.c b/arch/arm/mach-integrator/integrator_cp.c
new file mode 100644
index 00000000..2f4c9248
--- /dev/null
+++ b/arch/arm/mach-integrator/integrator_cp.c
@@ -0,0 +1,529 @@
+/*
+ *  linux/arch/arm/mach-integrator/integrator_cp.c
+ *
+ *  Copyright (C) 2003 Deep Blue Solutions Ltd
+ *
+ * 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.
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/string.h>
+#include <linux/device.h>
+#include <linux/amba/bus.h>
+#include <linux/amba/kmi.h>
+#include <linux/amba/clcd.h>
+#include <linux/amba/mmci.h>
+#include <linux/io.h>
+#include <linux/irqchip/versatile-fpga.h>
+#include <linux/gfp.h>
+#include <linux/mtd/physmap.h>
+#include <linux/platform_data/clk-integrator.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/sys_soc.h>
+
+#include <mach/hardware.h>
+#include <mach/platform.h>
+#include <asm/setup.h>
+#include <asm/mach-types.h>
+#include <asm/hardware/arm_timer.h>
+#include <asm/hardware/icst.h>
+
+#include <mach/cm.h>
+#include <mach/lm.h>
+#include <mach/irqs.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/irq.h>
+#include <asm/mach/map.h>
+#include <asm/mach/time.h>
+
+#include <asm/hardware/timer-sp.h>
+
+#include <plat/clcd.h>
+#include <plat/sched_clock.h>
+
+#include "common.h"
+
+/* Base address to the CP controller */
+static void __iomem *intcp_con_base;
+
+#define INTCP_PA_FLASH_BASE		0x24000000
+
+#define INTCP_PA_CLCD_BASE		0xc0000000
+
+#define INTCP_FLASHPROG			0x04
+#define CINTEGRATOR_FLASHPROG_FLVPPEN	(1 << 0)
+#define CINTEGRATOR_FLASHPROG_FLWREN	(1 << 1)
+
+/*
+ * Logical      Physical
+ * f1000000	10000000	Core module registers
+ * f1100000	11000000	System controller registers
+ * f1200000	12000000	EBI registers
+ * f1300000	13000000	Counter/Timer
+ * f1400000	14000000	Interrupt controller
+ * f1600000	16000000	UART 0
+ * f1700000	17000000	UART 1
+ * f1a00000	1a000000	Debug LEDs
+ * fc900000	c9000000	GPIO
+ * fca00000	ca000000	SIC
+ * fcb00000	cb000000	CP system control
+ */
+
+static struct map_desc intcp_io_desc[] __initdata __maybe_unused = {
+	{
+		.virtual	= IO_ADDRESS(INTEGRATOR_HDR_BASE),
+		.pfn		= __phys_to_pfn(INTEGRATOR_HDR_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE
+	}, {
+		.virtual	= IO_ADDRESS(INTEGRATOR_EBI_BASE),
+		.pfn		= __phys_to_pfn(INTEGRATOR_EBI_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE
+	}, {
+		.virtual	= IO_ADDRESS(INTEGRATOR_CT_BASE),
+		.pfn		= __phys_to_pfn(INTEGRATOR_CT_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE
+	}, {
+		.virtual	= IO_ADDRESS(INTEGRATOR_IC_BASE),
+		.pfn		= __phys_to_pfn(INTEGRATOR_IC_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE
+	}, {
+		.virtual	= IO_ADDRESS(INTEGRATOR_UART0_BASE),
+		.pfn		= __phys_to_pfn(INTEGRATOR_UART0_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE
+	}, {
+		.virtual	= IO_ADDRESS(INTEGRATOR_DBG_BASE),
+		.pfn		= __phys_to_pfn(INTEGRATOR_DBG_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE
+	}, {
+		.virtual	= IO_ADDRESS(INTEGRATOR_CP_GPIO_BASE),
+		.pfn		= __phys_to_pfn(INTEGRATOR_CP_GPIO_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE
+	}, {
+		.virtual	= IO_ADDRESS(INTEGRATOR_CP_SIC_BASE),
+		.pfn		= __phys_to_pfn(INTEGRATOR_CP_SIC_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE
+	}
+};
+
+static void __init intcp_map_io(void)
+{
+	iotable_init(intcp_io_desc, ARRAY_SIZE(intcp_io_desc));
+}
+
+/*
+ * Flash handling.
+ */
+static int intcp_flash_init(struct platform_device *dev)
+{
+	u32 val;
+
+	val = readl(intcp_con_base + INTCP_FLASHPROG);
+	val |= CINTEGRATOR_FLASHPROG_FLWREN;
+	writel(val, intcp_con_base + INTCP_FLASHPROG);
+
+	return 0;
+}
+
+static void intcp_flash_exit(struct platform_device *dev)
+{
+	u32 val;
+
+	val = readl(intcp_con_base + INTCP_FLASHPROG);
+	val &= ~(CINTEGRATOR_FLASHPROG_FLVPPEN|CINTEGRATOR_FLASHPROG_FLWREN);
+	writel(val, intcp_con_base + INTCP_FLASHPROG);
+}
+
+static void intcp_flash_set_vpp(struct platform_device *pdev, int on)
+{
+	u32 val;
+
+	val = readl(intcp_con_base + INTCP_FLASHPROG);
+	if (on)
+		val |= CINTEGRATOR_FLASHPROG_FLVPPEN;
+	else
+		val &= ~CINTEGRATOR_FLASHPROG_FLVPPEN;
+	writel(val, intcp_con_base + INTCP_FLASHPROG);
+}
+
+static struct physmap_flash_data intcp_flash_data = {
+	.width		= 4,
+	.init		= intcp_flash_init,
+	.exit		= intcp_flash_exit,
+	.set_vpp	= intcp_flash_set_vpp,
+};
+
+/*
+ * It seems that the card insertion interrupt remains active after
+ * we've acknowledged it.  We therefore ignore the interrupt, and
+ * rely on reading it from the SIC.  This also means that we must
+ * clear the latched interrupt.
+ */
+static unsigned int mmc_status(struct device *dev)
+{
+	unsigned int status = readl(__io_address(0xca000000 + 4));
+	writel(8, intcp_con_base + 8);
+
+	return status & 8;
+}
+
+static struct mmci_platform_data mmc_data = {
+	.ocr_mask	= MMC_VDD_32_33|MMC_VDD_33_34,
+	.status		= mmc_status,
+	.gpio_wp	= -1,
+	.gpio_cd	= -1,
+};
+
+/*
+ * CLCD support
+ */
+/*
+ * Ensure VGA is selected.
+ */
+static void cp_clcd_enable(struct clcd_fb *fb)
+{
+	struct fb_var_screeninfo *var = &fb->fb.var;
+	u32 val = CM_CTRL_STATIC1 | CM_CTRL_STATIC2
+			| CM_CTRL_LCDEN0 | CM_CTRL_LCDEN1;
+
+	if (var->bits_per_pixel <= 8 ||
+	    (var->bits_per_pixel == 16 && var->green.length == 5))
+		/* Pseudocolor, RGB555, BGR555 */
+		val |= CM_CTRL_LCDMUXSEL_VGA555_TFT555;
+	else if (fb->fb.var.bits_per_pixel <= 16)
+		/* truecolor RGB565 */
+		val |= CM_CTRL_LCDMUXSEL_VGA565_TFT555;
+	else
+		val = 0; /* no idea for this, don't trust the docs */
+
+	cm_control(CM_CTRL_LCDMUXSEL_MASK|
+		   CM_CTRL_LCDEN0|
+		   CM_CTRL_LCDEN1|
+		   CM_CTRL_STATIC1|
+		   CM_CTRL_STATIC2|
+		   CM_CTRL_STATIC|
+		   CM_CTRL_n24BITEN, val);
+}
+
+static int cp_clcd_setup(struct clcd_fb *fb)
+{
+	fb->panel = versatile_clcd_get_panel("VGA");
+	if (!fb->panel)
+		return -EINVAL;
+
+	return versatile_clcd_setup_dma(fb, SZ_1M);
+}
+
+static struct clcd_board clcd_data = {
+	.name		= "Integrator/CP",
+	.caps		= CLCD_CAP_5551 | CLCD_CAP_RGB565 | CLCD_CAP_888,
+	.check		= clcdfb_check,
+	.decode		= clcdfb_decode,
+	.enable		= cp_clcd_enable,
+	.setup		= cp_clcd_setup,
+	.mmap		= versatile_clcd_mmap_dma,
+	.remove		= versatile_clcd_remove_dma,
+};
+
+#define REFCOUNTER (__io_address(INTEGRATOR_HDR_BASE) + 0x28)
+
+static void __init intcp_init_early(void)
+{
+#ifdef CONFIG_PLAT_VERSATILE_SCHED_CLOCK
+	versatile_sched_clock_init(REFCOUNTER, 24000000);
+#endif
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id fpga_irq_of_match[] __initconst = {
+	{ .compatible = "arm,versatile-fpga-irq", .data = fpga_irq_of_init, },
+	{ /* Sentinel */ }
+};
+
+static void __init intcp_init_irq_of(void)
+{
+	of_irq_init(fpga_irq_of_match);
+	integrator_clk_init(true);
+}
+
+/*
+ * For the Device Tree, add in the UART, MMC and CLCD specifics as AUXDATA
+ * and enforce the bus names since these are used for clock lookups.
+ */
+static struct of_dev_auxdata intcp_auxdata_lookup[] __initdata = {
+	OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_RTC_BASE,
+		"rtc", NULL),
+	OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART0_BASE,
+		"uart0", NULL),
+	OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART1_BASE,
+		"uart1", NULL),
+	OF_DEV_AUXDATA("arm,primecell", KMI0_BASE,
+		"kmi0", NULL),
+	OF_DEV_AUXDATA("arm,primecell", KMI1_BASE,
+		"kmi1", NULL),
+	OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_CP_MMC_BASE,
+		"mmci", &mmc_data),
+	OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_CP_AACI_BASE,
+		"aaci", &mmc_data),
+	OF_DEV_AUXDATA("arm,primecell", INTCP_PA_CLCD_BASE,
+		"clcd", &clcd_data),
+	OF_DEV_AUXDATA("cfi-flash", INTCP_PA_FLASH_BASE,
+		"physmap-flash", &intcp_flash_data),
+	{ /* sentinel */ },
+};
+
+static void __init intcp_init_of(void)
+{
+	struct device_node *root;
+	struct device_node *cpcon;
+	struct device *parent;
+	struct soc_device *soc_dev;
+	struct soc_device_attribute *soc_dev_attr;
+	u32 intcp_sc_id;
+	int err;
+
+	/* Here we create an SoC device for the root node */
+	root = of_find_node_by_path("/");
+	if (!root)
+		return;
+	cpcon = of_find_node_by_path("/cpcon");
+	if (!cpcon)
+		return;
+
+	intcp_con_base = of_iomap(cpcon, 0);
+	if (!intcp_con_base)
+		return;
+
+	intcp_sc_id = readl(intcp_con_base);
+
+	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+	if (!soc_dev_attr)
+		return;
+
+	err = of_property_read_string(root, "compatible",
+				      &soc_dev_attr->soc_id);
+	if (err)
+		return;
+	err = of_property_read_string(root, "model", &soc_dev_attr->machine);
+	if (err)
+		return;
+	soc_dev_attr->family = "Integrator";
+	soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c",
+					   'A' + (intcp_sc_id & 0x0f));
+
+	soc_dev = soc_device_register(soc_dev_attr);
+	if (IS_ERR(soc_dev)) {
+		kfree(soc_dev_attr->revision);
+		kfree(soc_dev_attr);
+		return;
+	}
+
+	parent = soc_device_to_device(soc_dev);
+	integrator_init_sysfs(parent, intcp_sc_id);
+	of_platform_populate(root, of_default_bus_match_table,
+			intcp_auxdata_lookup, parent);
+}
+
+static const char * intcp_dt_board_compat[] = {
+	"arm,integrator-cp",
+	NULL,
+};
+
+DT_MACHINE_START(INTEGRATOR_CP_DT, "ARM Integrator/CP (Device Tree)")
+	.reserve	= integrator_reserve,
+	.map_io		= intcp_map_io,
+	.init_early	= intcp_init_early,
+	.init_irq	= intcp_init_irq_of,
+	.handle_irq	= fpga_handle_irq,
+	.init_machine	= intcp_init_of,
+	.restart	= integrator_restart,
+	.dt_compat      = intcp_dt_board_compat,
+MACHINE_END
+
+#endif
+
+#ifdef CONFIG_ATAGS
+
+/*
+ * For the ATAG boot some static mappings are needed. This will
+ * go away with the ATAG support down the road.
+ */
+
+static struct map_desc intcp_io_desc_atag[] __initdata = {
+	{
+		.virtual	= IO_ADDRESS(INTEGRATOR_CP_CTL_BASE),
+		.pfn		= __phys_to_pfn(INTEGRATOR_CP_CTL_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE
+	},
+};
+
+static void __init intcp_map_io_atag(void)
+{
+	iotable_init(intcp_io_desc_atag, ARRAY_SIZE(intcp_io_desc_atag));
+	intcp_con_base = __io_address(INTEGRATOR_CP_CTL_BASE);
+	intcp_map_io();
+}
+
+
+/*
+ * This is where non-devicetree initialization code is collected and stashed
+ * for eventual deletion.
+ */
+
+#define INTCP_FLASH_SIZE		SZ_32M
+
+static struct resource intcp_flash_resource = {
+	.start		= INTCP_PA_FLASH_BASE,
+	.end		= INTCP_PA_FLASH_BASE + INTCP_FLASH_SIZE - 1,
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device intcp_flash_device = {
+	.name		= "physmap-flash",
+	.id		= 0,
+	.dev		= {
+		.platform_data	= &intcp_flash_data,
+	},
+	.num_resources	= 1,
+	.resource	= &intcp_flash_resource,
+};
+
+#define INTCP_ETH_SIZE			0x10
+
+static struct resource smc91x_resources[] = {
+	[0] = {
+		.start	= INTEGRATOR_CP_ETH_BASE,
+		.end	= INTEGRATOR_CP_ETH_BASE + INTCP_ETH_SIZE - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= IRQ_CP_ETHINT,
+		.end	= IRQ_CP_ETHINT,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device smc91x_device = {
+	.name		= "smc91x",
+	.id		= 0,
+	.num_resources	= ARRAY_SIZE(smc91x_resources),
+	.resource	= smc91x_resources,
+};
+
+static struct platform_device *intcp_devs[] __initdata = {
+	&intcp_flash_device,
+	&smc91x_device,
+};
+
+#define INTCP_VA_CIC_BASE		__io_address(INTEGRATOR_HDR_BASE + 0x40)
+#define INTCP_VA_PIC_BASE		__io_address(INTEGRATOR_IC_BASE)
+#define INTCP_VA_SIC_BASE		__io_address(INTEGRATOR_CP_SIC_BASE)
+
+static void __init intcp_init_irq(void)
+{
+	u32 pic_mask, cic_mask, sic_mask;
+
+	/* These masks are for the HW IRQ registers */
+	pic_mask = ~((~0u) << (11 - 0));
+	pic_mask |= (~((~0u) << (29 - 22))) << 22;
+	cic_mask = ~((~0u) << (1 + IRQ_CIC_END - IRQ_CIC_START));
+	sic_mask = ~((~0u) << (1 + IRQ_SIC_END - IRQ_SIC_START));
+
+	/*
+	 * Disable all interrupt sources
+	 */
+	writel(0xffffffff, INTCP_VA_PIC_BASE + IRQ_ENABLE_CLEAR);
+	writel(0xffffffff, INTCP_VA_PIC_BASE + FIQ_ENABLE_CLEAR);
+	writel(0xffffffff, INTCP_VA_CIC_BASE + IRQ_ENABLE_CLEAR);
+	writel(0xffffffff, INTCP_VA_CIC_BASE + FIQ_ENABLE_CLEAR);
+	writel(sic_mask, INTCP_VA_SIC_BASE + IRQ_ENABLE_CLEAR);
+	writel(sic_mask, INTCP_VA_SIC_BASE + FIQ_ENABLE_CLEAR);
+
+	fpga_irq_init(INTCP_VA_PIC_BASE, "PIC", IRQ_PIC_START,
+		      -1, pic_mask, NULL);
+
+	fpga_irq_init(INTCP_VA_CIC_BASE, "CIC", IRQ_CIC_START,
+		      -1, cic_mask, NULL);
+
+	fpga_irq_init(INTCP_VA_SIC_BASE, "SIC", IRQ_SIC_START,
+		      IRQ_CP_CPPLDINT, sic_mask, NULL);
+
+	integrator_clk_init(true);
+}
+
+#define TIMER0_VA_BASE __io_address(INTEGRATOR_TIMER0_BASE)
+#define TIMER1_VA_BASE __io_address(INTEGRATOR_TIMER1_BASE)
+#define TIMER2_VA_BASE __io_address(INTEGRATOR_TIMER2_BASE)
+
+static void __init cp_timer_init(void)
+{
+	writel(0, TIMER0_VA_BASE + TIMER_CTRL);
+	writel(0, TIMER1_VA_BASE + TIMER_CTRL);
+	writel(0, TIMER2_VA_BASE + TIMER_CTRL);
+
+	sp804_clocksource_init(TIMER2_VA_BASE, "timer2");
+	sp804_clockevents_init(TIMER1_VA_BASE, IRQ_TIMERINT1, "timer1");
+}
+
+#define INTEGRATOR_CP_MMC_IRQS	{ IRQ_CP_MMCIINT0, IRQ_CP_MMCIINT1 }
+#define INTEGRATOR_CP_AACI_IRQS	{ IRQ_CP_AACIINT }
+
+static AMBA_APB_DEVICE(mmc, "mmci", 0, INTEGRATOR_CP_MMC_BASE,
+	INTEGRATOR_CP_MMC_IRQS, &mmc_data);
+
+static AMBA_APB_DEVICE(aaci, "aaci", 0, INTEGRATOR_CP_AACI_BASE,
+	INTEGRATOR_CP_AACI_IRQS, NULL);
+
+static AMBA_AHB_DEVICE(clcd, "clcd", 0, INTCP_PA_CLCD_BASE,
+	{ IRQ_CP_CLCDCINT }, &clcd_data);
+
+static struct amba_device *amba_devs[] __initdata = {
+	&mmc_device,
+	&aaci_device,
+	&clcd_device,
+};
+
+static void __init intcp_init(void)
+{
+	int i;
+
+	platform_add_devices(intcp_devs, ARRAY_SIZE(intcp_devs));
+
+	for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
+		struct amba_device *d = amba_devs[i];
+		amba_device_register(d, &iomem_resource);
+	}
+	integrator_init(true);
+}
+
+MACHINE_START(CINTEGRATOR, "ARM-IntegratorCP")
+	/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
+	.atag_offset	= 0x100,
+	.reserve	= integrator_reserve,
+	.map_io		= intcp_map_io_atag,
+	.init_early	= intcp_init_early,
+	.init_irq	= intcp_init_irq,
+	.handle_irq	= fpga_handle_irq,
+	.init_time	= cp_timer_init,
+	.init_machine	= intcp_init,
+	.restart	= integrator_restart,
+MACHINE_END
+
+#endif