arm: Add Initial TI-Nspire support
This patch adds support for the TI-Nspire platform.
Changes between v1 and v2:
* Added GENERIC_IRQ_CHIP to platform Kconfig
Signed-off-by: Daniel Tang <dt.tangr@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 49d993c..86a3ed9 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -964,6 +964,8 @@
source "arch/arm/mach-nomadik/Kconfig"
+source "arch/arm/mach-nspire/Kconfig"
+
source "arch/arm/plat-omap/Kconfig"
source "arch/arm/mach-omap1/Kconfig"
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 1d41908..fe07941 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -309,6 +309,20 @@
Say Y here if you want kernel low-level debugging support
on MVEBU based platforms.
+ config DEBUG_NSPIRE_CLASSIC_UART
+ bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
+ depends on ARCH_NSPIRE
+ help
+ Say Y here if you want kernel low-level debugging support
+ on TI-NSPIRE classic models.
+
+ config DEBUG_NSPIRE_CX_UART
+ bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
+ depends on ARCH_NSPIRE
+ help
+ Say Y here if you want kernel low-level debugging support
+ on TI-NSPIRE CX models.
+
config DEBUG_NOMADIK_UART
bool "Kernel low-level debugging messages via NOMADIK UART"
depends on ARCH_NOMADIK
@@ -633,6 +647,8 @@
DEBUG_IMX53_UART ||\
DEBUG_IMX6Q_UART
default "debug/mvebu.S" if DEBUG_MVEBU_UART
+ default "debug/nspire.S" if DEBUG_NSPIRE_CX_UART || \
+ DEBUG_NSPIRE_CLASSIC_UART
default "debug/mxs.S" if DEBUG_IMX23_UART || DEBUG_IMX28_UART
default "debug/nomadik.S" if DEBUG_NOMADIK_UART
default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 1ba358b..b4615aa 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -164,6 +164,7 @@
machine-$(CONFIG_ARCH_MVEBU) += mvebu
machine-$(CONFIG_ARCH_NETX) += netx
machine-$(CONFIG_ARCH_NOMADIK) += nomadik
+machine-$(CONFIG_ARCH_NSPIRE) += nspire
machine-$(CONFIG_ARCH_OMAP1) += omap1
machine-$(CONFIG_ARCH_OMAP2PLUS) += omap2
machine-$(CONFIG_ARCH_ORION5X) += orion5x
diff --git a/arch/arm/include/debug/nspire.S b/arch/arm/include/debug/nspire.S
new file mode 100644
index 0000000..886fd27
--- /dev/null
+++ b/arch/arm/include/debug/nspire.S
@@ -0,0 +1,28 @@
+/*
+ * linux/arch/arm/include/debug/nspire.S
+ *
+ * Copyright (C) 2013 Daniel Tang <tangrs@tangrs.id.au>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#define NSPIRE_EARLY_UART_PHYS_BASE 0x90020000
+#define NSPIRE_EARLY_UART_VIRT_BASE 0xfee20000
+
+.macro addruart, rp, rv, tmp
+ ldr \rp, =(NSPIRE_EARLY_UART_PHYS_BASE) @ physical base address
+ ldr \rv, =(NSPIRE_EARLY_UART_VIRT_BASE) @ virtual base address
+.endm
+
+
+#ifdef CONFIG_DEBUG_NSPIRE_CX_UART
+#include <asm/hardware/debug-pl01x.S>
+#endif
+
+#ifdef CONFIG_DEBUG_NSPIRE_CLASSIC_UART
+#define UART_SHIFT 2
+#include <asm/hardware/debug-8250.S>
+#endif
diff --git a/arch/arm/mach-nspire/Kconfig b/arch/arm/mach-nspire/Kconfig
new file mode 100644
index 0000000..59d8f0a
--- /dev/null
+++ b/arch/arm/mach-nspire/Kconfig
@@ -0,0 +1,16 @@
+config ARCH_NSPIRE
+ bool "TI-NSPIRE based"
+ depends on ARCH_MULTI_V4_V5
+ depends on MMU
+ select CPU_ARM926T
+ select COMMON_CLK
+ select GENERIC_CLOCKEVENTS
+ select GENERIC_IRQ_CHIP
+ select SPARSE_IRQ
+ select ARM_AMBA
+ select ARM_VIC
+ select ARM_TIMER_SP804
+ select USE_OF
+ select CLKSRC_OF
+ help
+ This enables support for systems using the TI-NSPIRE CPU
diff --git a/arch/arm/mach-nspire/Makefile b/arch/arm/mach-nspire/Makefile
new file mode 100644
index 0000000..1bec256
--- /dev/null
+++ b/arch/arm/mach-nspire/Makefile
@@ -0,0 +1,2 @@
+obj-y += nspire.o
+obj-y += clcd.o
diff --git a/arch/arm/mach-nspire/Makefile.boot b/arch/arm/mach-nspire/Makefile.boot
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/arch/arm/mach-nspire/Makefile.boot
diff --git a/arch/arm/mach-nspire/clcd.c b/arch/arm/mach-nspire/clcd.c
new file mode 100644
index 0000000..abea126
--- /dev/null
+++ b/arch/arm/mach-nspire/clcd.c
@@ -0,0 +1,119 @@
+/*
+ * linux/arch/arm/mach-nspire/clcd.c
+ *
+ * Copyright (C) 2013 Daniel Tang <tangrs@tangrs.id.au>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/amba/bus.h>
+#include <linux/amba/clcd.h>
+#include <linux/dma-mapping.h>
+
+static struct clcd_panel nspire_cx_lcd_panel = {
+ .mode = {
+ .name = "Color LCD",
+ .refresh = 60,
+ .xres = 320,
+ .yres = 240,
+ .sync = 0,
+ .vmode = FB_VMODE_NONINTERLACED,
+ .pixclock = 1,
+ .hsync_len = 6,
+ .vsync_len = 1,
+ .right_margin = 50,
+ .left_margin = 38,
+ .lower_margin = 3,
+ .upper_margin = 17,
+ },
+ .width = 65, /* ~6.50 cm */
+ .height = 49, /* ~4.87 cm */
+ .tim2 = TIM2_IPC,
+ .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
+ .bpp = 16,
+ .caps = CLCD_CAP_565,
+};
+
+static struct clcd_panel nspire_classic_lcd_panel = {
+ .mode = {
+ .name = "Grayscale LCD",
+ .refresh = 60,
+ .xres = 320,
+ .yres = 240,
+ .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+ .vmode = FB_VMODE_NONINTERLACED,
+ .pixclock = 1,
+ .hsync_len = 6,
+ .vsync_len = 1,
+ .right_margin = 6,
+ .left_margin = 6,
+ },
+ .width = 71, /* 7.11cm */
+ .height = 53, /* 5.33cm */
+ .tim2 = 0x80007d0,
+ .cntl = CNTL_LCDMONO8,
+ .bpp = 8,
+ .grayscale = 1,
+ .caps = CLCD_CAP_5551,
+};
+
+int nspire_clcd_setup(struct clcd_fb *fb)
+{
+ struct clcd_panel *panel;
+ size_t panel_size;
+ const char *type;
+ dma_addr_t dma;
+ int err;
+
+ BUG_ON(!fb->dev->dev.of_node);
+
+ err = of_property_read_string(fb->dev->dev.of_node, "lcd-type", &type);
+ if (err) {
+ pr_err("CLCD: Could not find lcd-type property\n");
+ return err;
+ }
+
+ if (!strcmp(type, "cx")) {
+ panel = &nspire_cx_lcd_panel;
+ } else if (!strcmp(type, "classic")) {
+ panel = &nspire_classic_lcd_panel;
+ } else {
+ pr_err("CLCD: Unknown lcd-type %s\n", type);
+ return -EINVAL;
+ }
+
+ panel_size = ((panel->mode.xres * panel->mode.yres) * panel->bpp) / 8;
+ panel_size = ALIGN(panel_size, PAGE_SIZE);
+
+ fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev,
+ panel_size, &dma, GFP_KERNEL);
+
+ if (!fb->fb.screen_base) {
+ pr_err("CLCD: unable to map framebuffer\n");
+ return -ENOMEM;
+ }
+
+ fb->fb.fix.smem_start = dma;
+ fb->fb.fix.smem_len = panel_size;
+ fb->panel = panel;
+
+ return 0;
+}
+
+int nspire_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
+{
+ return dma_mmap_writecombine(&fb->dev->dev, vma,
+ fb->fb.screen_base, fb->fb.fix.smem_start,
+ fb->fb.fix.smem_len);
+}
+
+void nspire_clcd_remove(struct clcd_fb *fb)
+{
+ dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
+ fb->fb.screen_base, fb->fb.fix.smem_start);
+}
diff --git a/arch/arm/mach-nspire/clcd.h b/arch/arm/mach-nspire/clcd.h
new file mode 100644
index 0000000..8c33d2c
--- /dev/null
+++ b/arch/arm/mach-nspire/clcd.h
@@ -0,0 +1,14 @@
+/*
+ * linux/arch/arm/mach-nspire/clcd.h
+ *
+ * Copyright (C) 2013 Daniel Tang <tangrs@tangrs.id.au>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ */
+
+int nspire_clcd_setup(struct clcd_fb *fb);
+int nspire_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma);
+void nspire_clcd_remove(struct clcd_fb *fb);
diff --git a/arch/arm/mach-nspire/mmio.h b/arch/arm/mach-nspire/mmio.h
new file mode 100644
index 0000000..8813471
--- /dev/null
+++ b/arch/arm/mach-nspire/mmio.h
@@ -0,0 +1,20 @@
+/*
+ * linux/arch/arm/mach-nspire/mmio.h
+ *
+ * Copyright (C) 2013 Daniel Tang <tangrs@tangrs.id.au>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#define NSPIRE_MISC_PHYS_BASE 0x900A0000
+#define NSPIRE_MISC_HWRESET 0x08
+
+#define NSPIRE_PWR_PHYS_BASE 0x900B0000
+#define NSPIRE_PWR_VIRT_BASE 0xFEEB0000
+#define NSPIRE_PWR_BUS_DISABLE1 0x18
+#define NSPIRE_PWR_BUS_DISABLE2 0x20
+
+#define NSPIRE_LCD_PHYS_BASE 0xC0000000
diff --git a/arch/arm/mach-nspire/nspire.c b/arch/arm/mach-nspire/nspire.c
new file mode 100644
index 0000000..99e2609
--- /dev/null
+++ b/arch/arm/mach-nspire/nspire.c
@@ -0,0 +1,89 @@
+/*
+ * linux/arch/arm/mach-nspire/nspire.c
+ *
+ * Copyright (C) 2013 Daniel Tang <tangrs@tangrs.id.au>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/init.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/irqchip.h>
+#include <linux/irqchip/arm-vic.h>
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/amba/bus.h>
+#include <linux/amba/clcd.h>
+#include <linux/clocksource.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach-types.h>
+#include <asm/mach/map.h>
+
+#include <asm/hardware/timer-sp.h>
+
+#include "mmio.h"
+#include "clcd.h"
+
+static const char *nspire_dt_match[] __initconst = {
+ "ti,nspire",
+ "ti,nspire-cx",
+ "ti,nspire-tp",
+ "ti,nspire-clp",
+ NULL,
+};
+
+static void __init nspire_map_io(void)
+{
+ debug_ll_io_init();
+}
+
+static struct clcd_board nspire_clcd_data = {
+ .name = "LCD",
+ .caps = CLCD_CAP_5551 | CLCD_CAP_565,
+ .check = clcdfb_check,
+ .decode = clcdfb_decode,
+ .setup = nspire_clcd_setup,
+ .mmap = nspire_clcd_mmap,
+ .remove = nspire_clcd_remove,
+};
+
+
+static struct of_dev_auxdata nspire_auxdata[] __initdata = {
+ OF_DEV_AUXDATA("arm,pl111", NSPIRE_LCD_PHYS_BASE,
+ NULL, &nspire_clcd_data),
+ { }
+};
+
+static void __init nspire_init(void)
+{
+ of_platform_populate(NULL, of_default_bus_match_table,
+ nspire_auxdata, NULL);
+}
+
+static void __init nspire_init_time(void)
+{
+ of_clk_init(NULL);
+ clocksource_of_init();
+}
+
+static void nspire_restart(char mode, const char *cmd)
+{
+ void __iomem *base = ioremap(NSPIRE_MISC_PHYS_BASE, SZ_4K);
+ if (!base)
+ return;
+
+ writel(2, base + NSPIRE_MISC_HWRESET);
+}
+
+DT_MACHINE_START(NSPIRE, "TI-NSPIRE")
+ .dt_compat = nspire_dt_match,
+ .map_io = nspire_map_io,
+ .init_time = nspire_init_time,
+ .init_machine = nspire_init,
+ .restart = nspire_restart,
+MACHINE_END
