Re: [RFC PATCH arm: initial TI-Nspire support]
From: Daniel Tang
Date: Mon Apr 08 2013 - 07:34:06 EST
Changes:
* Moved CLCD stuff to separate file until DT support for PL11x comes along
* Whitespace cleanup in arch/arm/Makefile removed from patch
* Rewrote code to find SP804 devices and use the first available one as a clockevent and the rest as clock sources until DT support comes to the SP804 driver.
* Fix up platform selection in Kconfig. TI-NSPIRE based option was visible even when ARCH_MULTI_V4_V5 is not selected.
* Added keypad driver and keymap
* Support for 'make dtbs'
Signed-off-by: Daniel Tang <dt.tangr@xxxxxxxxx>
---
arch/arm/Kconfig | 2 +
arch/arm/Kconfig.debug | 16 ++
arch/arm/Makefile | 1 +
arch/arm/boot/dts/Makefile | 1 +
arch/arm/boot/dts/nspire-cx.dts | 110 ++++++++++
arch/arm/boot/dts/nspire.dtsi | 168 +++++++++++++++
arch/arm/include/debug/nspire.S | 28 +++
arch/arm/mach-nspire/Kconfig | 14 ++
arch/arm/mach-nspire/Makefile | 2 +
arch/arm/mach-nspire/Makefile.boot | 0
arch/arm/mach-nspire/clcd.c | 123 +++++++++++
arch/arm/mach-nspire/clcd.h | 14 ++
arch/arm/mach-nspire/mmio.h | 15 ++
arch/arm/mach-nspire/nspire.c | 139 ++++++++++++
drivers/input/keyboard/Kconfig | 10 +
drivers/input/keyboard/Makefile | 1 +
drivers/input/keyboard/nspire-keypad.c | 318 ++++++++++++++++++++++++++++
include/linux/platform_data/nspire-keypad.h | 28 +++
18 files changed, 990 insertions(+)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 1cacda4..3f0cd8c 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1081,6 +1081,8 @@ source "arch/arm/mach-netx/Kconfig"
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 9b31f43..5da3a50 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -298,6 +298,20 @@ choice
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_OMAP2PLUS_UART
bool "Kernel low-level debugging messages via OMAP2PLUS UART"
depends on ARCH_OMAP2PLUS
@@ -591,6 +605,8 @@ config DEBUG_LL_INCLUDE
DEBUG_IMX6Q_UART
default "debug/highbank.S" if DEBUG_HIGHBANK_UART
default "debug/mvebu.S" if DEBUG_MVEBU_UART
+ default "debug/nspire.S" if DEBUG_NSPIRE_CX_UART || \
+ DEBUG_NSPIRE_CLASSIC_UART
default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
default "debug/picoxcell.S" if DEBUG_PICOXCELL_UART
default "debug/socfpga.S" if DEBUG_SOCFPGA_UART
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index ee4605f..2580d2b 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -165,6 +165,7 @@ machine-$(CONFIG_ARCH_MXS) += mxs
machine-$(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/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 9c62558..adf8116 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -114,6 +114,7 @@ dtb-$(CONFIG_ARCH_MXS) += imx23-evk.dtb \
imx28-sps1.dtb \
imx28-tx28.dtb
dtb-$(CONFIG_ARCH_NOMADIK) += ste-nomadik-s8815.dtb
+dtb-$(CONFIG_ARCH_NSPIRE) += nspire-cx.dtb
dtb-$(CONFIG_ARCH_OMAP2PLUS) += omap2420-h4.dtb \
omap3-beagle.dtb \
omap3-beagle-xm.dtb \
diff --git a/arch/arm/boot/dts/nspire-cx.dts b/arch/arm/boot/dts/nspire-cx.dts
new file mode 100644
index 0000000..1da2e44
--- /dev/null
+++ b/arch/arm/boot/dts/nspire-cx.dts
@@ -0,0 +1,110 @@
+/*
+ * linux/arch/arm/boot/nspire-cx.dts
+ *
+ * Copyright (C) 2012 Daniel Tang <tangrs@xxxxxxxxxxxx>
+ *
+ * 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.
+ *
+ */
+/dts-v1/;
+
+/include/ "nspire.dtsi"
+
+/ {
+ model = "TI-NSPIRE CX";
+ compatible = "arm,nspire-cx";
+
+ memory {
+ device_type = "memory";
+ reg = <0x10000000 0x4000000>; /* 64 MB */
+ };
+
+ uart_clk: uart_clk {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
+ clock-frequency = <12000000>;
+ };
+
+ /* Not really a fixed clock but we'll fix this later */
+ apb_pclk: apb_pclk {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
+ clock-frequency = <33000000>;
+ };
+
+ ahb {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ intc: interrupt-controller@DC000000 {
+ compatible = "arm,pl190-vic";
+ interrupt-controller;
+ reg = <0xDC000000 0x1000>;
+ #interrupt-cells = <1>;
+ };
+
+ lcd: lcd@C0000000 {
+ lcd-type = "cx";
+ };
+
+ apb@90000000 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ i2c@90050000 {
+ compatible = "snps,designware-i2c";
+ reg = <0x90050000 0x1000>;
+ interrupts = <20>;
+ };
+
+ /*
+ fast_timer: timer@90010000 {
+ compatible = "arm,sp804", "arm,primecell";
+ };
+ */
+
+ uart0: serial@90020000 {
+ compatible = "arm,pl011", "arm,primecell";
+ };
+
+ timer0: timer@900C0000 {
+ compatible = "arm,sp804", "arm,primecell";
+ };
+
+ timer1: timer@900D0000 {
+ compatible = "arm,sp804", "arm,primecell";
+ };
+
+ keypad: input@900E0000 {
+ keymap = <
+ 0x0000001c 0x0001001c 0x00040039
+ 0x0005002c 0x00060015 0x0007000b
+ 0x0008000f 0x0100002d 0x01010011
+ 0x0102002f 0x01030004 0x01040016
+ 0x01050014 0x0106001f 0x01070002
+ 0x010a006a 0x02000013 0x02010010
+ 0x02020019 0x02030007 0x02040018
+ 0x02050031 0x02060032 0x02070005
+ 0x02080028 0x0209006c 0x03000026
+ 0x03010025 0x03020024 0x0303000a
+ 0x03040017 0x03050023 0x03060022
+ 0x03070008 0x03080035 0x03090069
+ 0x04000021 0x04010012 0x04020020
+ 0x0404002e 0x04050030 0x0406001e
+ 0x0407000d 0x04080037 0x04090067
+ 0x05010038 0x0502000c 0x0503001b
+ 0x05040034 0x0505001a 0x05060006
+ 0x05080027 0x0509000e 0x050a006f
+ 0x0600002b 0x0602004e 0x06030068
+ 0x06040003 0x0605006d 0x06060009
+ 0x06070001 0x0609000f 0x0708002a
+ 0x0709001d 0x070a0033 >;
+ };
+ };
+ };
+ chosen {
+ bootargs = "debug earlyprintk console=tty0 console=ttyAMA0,115200n8 root=/dev/ram0";
+ };
+};
diff --git a/arch/arm/boot/dts/nspire.dtsi b/arch/arm/boot/dts/nspire.dtsi
new file mode 100644
index 0000000..d745e3d
--- /dev/null
+++ b/arch/arm/boot/dts/nspire.dtsi
@@ -0,0 +1,168 @@
+/*
+ * linux/arch/arm/boot/nspire.dtsi
+ *
+ * Copyright (C) 2012 Daniel Tang <tangrs@xxxxxxxxxxxx>
+ *
+ * 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/ "skeleton.dtsi"
+
+/ {
+ interrupt-parent = <&intc>;
+
+ cpus {
+ cpu@0 {
+ compatible = "arm,arm926ejs";
+ };
+ };
+
+ bootrom: bootrom@00000000 {
+ reg = <0x00000000 0x80000>;
+ };
+
+ sram: sram@A4000000 {
+ device = "memory";
+ reg = <0xA4000000 0x20000>;
+ };
+
+ timer_clk: timer_clk {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
+ clock-frequency = <32768>;
+ };
+
+ lcd_clk: lcd_clk {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
+ clock-frequency = <660000000>;
+ };
+
+ ahb {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ spi: spi@A9000000 {
+ reg = <0xA9000000 0x1000>;
+ };
+
+ usb0: usb@B0000000 {
+ reg = <0xB0000000 0x1000>;
+ interrupts = <8>;
+ };
+
+ usb1: usb@B4000000 {
+ reg = <0xB4000000 0x1000>;
+ interrupts = <9>;
+ status = "disabled";
+ };
+
+ lcd: lcd@C0000000 {
+ compatible = "arm,pl111", "arm,primecell";
+ reg = <0xC0000000 0x1000>;
+ interrupts = <21>;
+
+ clocks = <&lcd_clk>;
+ clock-names = "apb_pclk";
+ };
+
+ adc: adc@C4000000 {
+ reg = <0xC4000000 0x1000>;
+ interrupts = <11>;
+ };
+
+ tdes: crypto@C8010000 {
+ reg = <0xC8010000 0x1000>;
+ };
+
+ sha256: crypto@CC000000 {
+ reg = <0xCC000000 0x1000>;
+ };
+
+ apb@90000000 {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ clock-ranges;
+ ranges;
+
+ gpio: gpio@90000000 {
+ reg = <0x90000000 0x1000>;
+ interrupts = <7>;
+ };
+
+ fast_timer: timer@90010000 {
+ reg = <0x90010000 0x1000>;
+ interrupts = <17>;
+ };
+
+ uart: serial@90020000 {
+ reg = <0x90020000 0x1000>;
+ interrupts = <1>;
+
+ clocks = <&uart_clk>, <&apb_pclk>;
+ clock-names = "uart_clk", "apb_pclk";
+ };
+
+ timer0: timer@900C0000 {
+ reg = <0x900C0000 0x1000>;
+
+ clocks = <&timer_clk>;
+ clock-names = "timer_clk";
+ };
+
+ timer1: timer@900D0000 {
+ reg = <0x900D0000 0x1000>;
+ interrupts = <19>;
+
+ clocks = <&timer_clk>;
+ clock-names = "timer_clk";
+ };
+
+ watchdog: watchdog@90060000 {
+ compatible = "arm,amba-primecell";
+ reg = <0x90060000 0x1000>;
+ interrupts = <3>;
+ };
+
+ rtc: rtc@90090000 {
+ reg = <0x90090000 0x1000>;
+ interrupts = <4>;
+ };
+
+ misc: misc@900A0000 {
+ reg = <0x900A0000 0x1000>;
+ };
+
+ pwr: pwr@900B0000 {
+ reg = <0x900B0000 0x1000>;
+ interrupts = <15>;
+ };
+
+ keypad: input@900E0000 {
+ compatible = "nspire-keypad";
+ reg = <0x900E0000 0x1000>;
+ interrupts = <16>;
+
+ scan-interval = <1000>;
+ row-delay = <200>;
+
+ clocks = <&apb_pclk>;
+ clock-names = "apb_pclk";
+ };
+
+ contrast: contrast@900F0000 {
+ reg = <0x900F0000 0x1000>;
+ };
+
+ led: led@90110000 {
+ reg = <0x90110000 0x1000>;
+ };
+ };
+ };
+};
diff --git a/arch/arm/include/debug/nspire.S b/arch/arm/include/debug/nspire.S
new file mode 100644
index 0000000..3a9729c
--- /dev/null
+++ b/arch/arm/include/debug/nspire.S
@@ -0,0 +1,28 @@
+/*
+ * linux/arch/arm/include/debug/nspire.S
+ *
+ * Copyright (C) 2012 Daniel Tang <tangrs@xxxxxxxxxxxx>
+ *
+ * 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..d485280
--- /dev/null
+++ b/arch/arm/mach-nspire/Kconfig
@@ -0,0 +1,14 @@
+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 SPARSE_IRQ
+ select ARM_AMBA
+ select ARM_VIC
+ select ARM_TIMER_SP804
+ select USE_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
diff --git a/arch/arm/mach-nspire/clcd.c b/arch/arm/mach-nspire/clcd.c
new file mode 100644
index 0000000..ee6ffcb
--- /dev/null
+++ b/arch/arm/mach-nspire/clcd.c
@@ -0,0 +1,123 @@
+/*
+ * linux/arch/arm/mach-nspire/clcd.c
+ *
+ * Copyright (C) 2012 Daniel Tang <tangrs@xxxxxxxxxxxx>
+ *
+ * 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_BGR | CNTL_LCDTFT | CNTL_LCDVCOMP(1) |
+ CNTL_LCDBPP16_565),
+ .bpp = 16,
+};
+
+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_LCDBPP8 | CNTL_LCDMONO8,
+ .bpp = 8,
+ .grayscale = 1
+};
+
+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..7144399
--- /dev/null
+++ b/arch/arm/mach-nspire/clcd.h
@@ -0,0 +1,14 @@
+/*
+ * linux/arch/arm/mach-nspire/clcd.h
+ *
+ * Copyright (C) 2012 Daniel Tang <tangrs@xxxxxxxxxxxx>
+ *
+ * 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..f0a1fa5
--- /dev/null
+++ b/arch/arm/mach-nspire/mmio.h
@@ -0,0 +1,15 @@
+/*
+ * linux/arch/arm/mach-nspire/mmio.h
+ *
+ * Copyright (C) 2012 Daniel Tang <tangrs@xxxxxxxxxxxx>
+ *
+ * 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
+
+#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..7d972b8
--- /dev/null
+++ b/arch/arm/mach-nspire/nspire.c
@@ -0,0 +1,139 @@
+/*
+ * linux/arch/arm/mach-nspire/nspire.c
+ *
+ * Copyright (C) 2012 Daniel Tang <tangrs@xxxxxxxxxxxx>
+ *
+ * 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 <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 = {
+ "arm,nspire",
+ "arm,nspire-cx",
+ "arm,nspire-tp",
+ "arm,nspire-clp",
+ NULL,
+};
+
+static struct map_desc nspire_io_desc[] __initdata = {
+ {
+ .virtual = NSPIRE_EARLY_UART_VIRT_BASE,
+ .pfn = __phys_to_pfn(NSPIRE_EARLY_UART_PHYS_BASE),
+ .length = SZ_4K,
+ .type = MT_DEVICE
+ }
+};
+
+#define TIMER_NAME_MAXLEN 32
+static void __init nspire_add_sp804_timers(void)
+{
+ struct device_node *of_timer;
+ int clockevents_found = 0;
+
+ for_each_compatible_node(of_timer, NULL, "arm,sp804") {
+ struct resource res;
+ void __iomem *base;
+ char *timer_name;
+ struct clk *clk;
+ int irq;
+
+ clk = of_clk_get_by_name(of_timer, NULL);
+ if (WARN_ON(!clk))
+ continue;
+
+ timer_name = kzalloc(TIMER_NAME_MAXLEN, GFP_ATOMIC);
+ if (!timer_name)
+ break;
+
+ base = of_iomap(of_timer, 0);
+ if (WARN_ON(!base)) {
+ kfree(timer_name);
+ continue;
+ }
+
+ of_address_to_resource(of_timer, 0, &res);
+ scnprintf(timer_name, TIMER_NAME_MAXLEN, "%llx.%s",
+ (unsigned long long)res.start,
+ of_timer->name);
+
+ clk_register_clkdev(clk, timer_name, "sp804");
+ if (!clockevents_found) {
+ irq = irq_of_parse_and_map(of_timer, 0);
+ if (irq) {
+ sp804_clockevents_init(base, irq,timer_name);
+ clockevents_found = 1;
+ continue;
+ }
+ }
+
+ sp804_clocksource_init(base, timer_name);
+ }
+}
+
+
+static void __init nspire_init_timer(void)
+{
+ of_clk_init(NULL);
+ nspire_add_sp804_timers();
+}
+
+static void __init nspire_map_io(void)
+{
+ iotable_init(nspire_io_desc, ARRAY_SIZE(nspire_io_desc));
+}
+
+static struct clcd_board nspire_clcd_data = {
+ .name = "LCD",
+ .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 nspire_restart(char mode, const char *cmd)
+{
+}
+
+DT_MACHINE_START(NSPIRE, "TI-NSPIRE")
+ .map_io = nspire_map_io,
+ .init_irq = irqchip_init,
+ .init_time = nspire_init_timer,
+ .init_machine = nspire_init,
+ .dt_compat = nspire_dt_match,
+ .restart = nspire_restart,
+MACHINE_END
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index ac05006..677adba 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -418,6 +418,16 @@ config KEYBOARD_NOMADIK
To compile this driver as a module, choose M here: the
module will be called nmk-ske-keypad.
+config KEYBOARD_NSPIRE
+ tristate "TI-NSPIRE builtin keyboard"
+ depends on ARCH_NSPIRE
+ select INPUT_MATRIXKMAP
+ help
+ Say Y here if you want to use the builtin keypad on the TI-NSPIRE.
+
+ To compile this driver as a module, choose M here: the
+ module will be called nspire-keypad.
+
config KEYBOARD_TEGRA
tristate "NVIDIA Tegra internal matrix keyboard controller support"
depends on ARCH_TEGRA && OF
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index 49b1645..89d997b 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -35,6 +35,7 @@ obj-$(CONFIG_KEYBOARD_MCS) += mcs_touchkey.o
obj-$(CONFIG_KEYBOARD_MPR121) += mpr121_touchkey.o
obj-$(CONFIG_KEYBOARD_NEWTON) += newtonkbd.o
obj-$(CONFIG_KEYBOARD_NOMADIK) += nomadik-ske-keypad.o
+obj-$(CONFIG_KEYBOARD_NSPIRE) += nspire-keypad.o
obj-$(CONFIG_KEYBOARD_OMAP) += omap-keypad.o
obj-$(CONFIG_KEYBOARD_OMAP4) += omap4-keypad.o
obj-$(CONFIG_KEYBOARD_OPENCORES) += opencores-kbd.o
diff --git a/drivers/input/keyboard/nspire-keypad.c b/drivers/input/keyboard/nspire-keypad.c
new file mode 100644
index 0000000..5b2b3cc
--- /dev/null
+++ b/drivers/input/keyboard/nspire-keypad.c
@@ -0,0 +1,318 @@
+/*
+ * linux/drivers/input/keyboard/nspire-keypad.c
+ *
+ * Copyright (C) 2013 Daniel Tang <tangrs@xxxxxxxxxxxx>
+ *
+ * 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/input/matrix_keypad.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/of.h>
+
+#include <linux/platform_data/nspire-keypad.h>
+
+#define KEYPAD_SCAN_MODE 0x00
+#define KEYPAD_CNTL 0x04
+#define KEYPAD_INT 0x08
+#define KEYPAD_INTMSK 0x0C
+
+#define KEYPAD_DATA 0x10
+#define KEYPAD_GPIO 0x30
+
+#define KEYPAD_UNKNOWN_INT 0x40
+#define KEYPAD_UNKNOWN_INT_STS 0x44
+
+
+struct nspire_keypad {
+ spinlock_t lock;
+
+ void __iomem *reg_base;
+ int irq;
+ u32 int_mask;
+
+ struct input_dev *input;
+ struct clk *clk;
+
+ struct nspire_keypad_data options;
+ int row_shift;
+};
+
+static inline void nspire_report_state(struct nspire_keypad *keypad,
+ int row, int col, unsigned int state)
+{
+ int code = MATRIX_SCAN_CODE(row, col, keypad->row_shift);
+ unsigned short *keymap = keypad->input->keycode;
+
+ state = keypad->options.active_low ? !state : !!state;
+ input_report_key(keypad->input, keymap[code], state);
+}
+
+static irqreturn_t nspire_keypad_irq(int irq, void *dev_id)
+{
+ struct nspire_keypad *keypad = dev_id;
+ u32 int_sts;
+ u16 state[8];
+ int row, col;
+
+ int_sts = readl(keypad->reg_base + KEYPAD_INT) & keypad->int_mask;
+
+ if (!int_sts)
+ return IRQ_NONE;
+
+ spin_lock(&keypad->lock);
+
+ memcpy_fromio(state, keypad->reg_base + KEYPAD_DATA, sizeof(state));
+
+ for (row = 0; row < KEYPAD_BITMASK_ROWS; row++) {
+ u16 bits = state[row];
+ for (col = 0; col < KEYPAD_BITMASK_COLS; col++) {
+ nspire_report_state(keypad, row, col, bits & (1<<col));
+ }
+ }
+ input_sync(keypad->input);
+ writel(0x3, keypad->reg_base + KEYPAD_INT);
+
+ spin_unlock(&keypad->lock);
+
+ return IRQ_HANDLED;
+}
+
+static int nspire_keypad_chip_init(struct nspire_keypad *keypad)
+{
+ unsigned long val = 0, cycles_per_us, delay_cycles, row_delay_cycles;
+
+ cycles_per_us = (clk_get_rate(keypad->clk) / 1000000);
+ if (cycles_per_us == 0)
+ cycles_per_us = 1;
+
+ delay_cycles = cycles_per_us * keypad->options.scan_interval;
+ WARN_ON(delay_cycles >= (1<<16)); /* Overflow */
+ delay_cycles &= 0xffff;
+
+ row_delay_cycles = cycles_per_us * keypad->options.row_delay;
+ WARN_ON(row_delay_cycles >= (1<<14)); /* Overflow */
+ row_delay_cycles &= 0x3fff;
+
+
+ val |= (3<<0); /* Set scan mode to 3 (continuous scan) */
+ val |= (row_delay_cycles<<2); /* Delay between scanning each row */
+ val |= (delay_cycles<<16); /* Delay between scans */
+ writel(val, keypad->reg_base + KEYPAD_SCAN_MODE);
+
+ val = (KEYPAD_BITMASK_ROWS & 0xff) | (KEYPAD_BITMASK_COLS & 0xff)<<8;
+ writel(val, keypad->reg_base + KEYPAD_CNTL);
+
+ /* Enable interrupts */
+ keypad->int_mask = (1<<1);
+ writel(keypad->int_mask, keypad->reg_base + 0xc);
+
+ /* Disable GPIO interrupts to prevent hanging on touchpad */
+ /* Possibly used to detect touchpad events */
+ writel(0, keypad->reg_base + KEYPAD_UNKNOWN_INT);
+ /* Acknowledge existing interrupts */
+ writel(~0, keypad->reg_base + KEYPAD_UNKNOWN_INT_STS);
+
+ return 0;
+}
+
+static int nspire_keypad_probe(struct platform_device *pdev)
+{
+ const struct nspire_keypad_data *plat = pdev->dev.platform_data;
+ const struct device_node *of_node = pdev->dev.of_node;
+ struct nspire_keypad *keypad;
+ struct input_dev *input;
+ struct resource *res;
+ struct clk *clk;
+ int irq, error;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "failed to get keypad irq\n");
+ return -EINVAL;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "missing platform resources\n");
+ return -EINVAL;
+ }
+
+ clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(clk)) {
+ dev_err(&pdev->dev, "unable to get clock\n");
+ return -EINVAL;
+ }
+
+ clk_prepare(clk);
+ error = clk_enable(clk);
+ if (error) {
+ goto err_put_clk;
+ }
+
+ keypad = kzalloc(sizeof(struct nspire_keypad), GFP_KERNEL);
+ input = input_allocate_device();
+ if (!keypad || !input) {
+ dev_err(&pdev->dev, "failed to allocate keypad memory\n");
+ error = -ENOMEM;
+ goto err_free_mem;
+ }
+
+ if (plat) {
+ memcpy(&keypad->options, plat, sizeof(*plat));
+ } else {
+ /* Load values from device tree */
+
+ error = of_property_read_u32(of_node, "scan-interval",
+ &keypad->options.scan_interval);
+ if (error) {
+ dev_err(&pdev->dev, "failed to get scan-interval\n");
+ goto err_free_mem;
+ }
+
+ error = of_property_read_u32(of_node, "row-delay",
+ &keypad->options.row_delay);
+ if (error) {
+ dev_err(&pdev->dev, "failed to get row-delay\n");
+ goto err_free_mem;
+ }
+
+ keypad->options.active_low = of_property_read_bool(of_node,
+ "active-low");
+
+ keypad->options.keymap = NULL;
+ }
+
+ keypad->row_shift = get_count_order(KEYPAD_BITMASK_COLS);
+ keypad->irq = irq;
+ keypad->clk = clk;
+ keypad->input = input;
+ spin_lock_init(&keypad->lock);
+
+ if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
+ dev_err(&pdev->dev, "failed to request I/O memory\n");
+ error = -EBUSY;
+ goto err_free_mem;
+ }
+
+ keypad->reg_base = ioremap(res->start, resource_size(res));
+ if (!keypad->reg_base) {
+ dev_err(&pdev->dev, "failed to remap I/O memory\n");
+ error = -ENXIO;
+ goto err_free_mem_region;
+ }
+
+ input->id.bustype = BUS_HOST;
+ input->name = "nspire-keypad";
+ input->dev.parent = &pdev->dev;
+
+ set_bit(EV_KEY, input->evbit);
+ set_bit(EV_REP, input->evbit);
+
+ error = matrix_keypad_build_keymap(keypad->options.keymap, "keymap",
+ KEYPAD_BITMASK_ROWS, KEYPAD_BITMASK_COLS, NULL, input);
+ if (error) {
+ dev_err(&pdev->dev, "building keymap failed\n");
+ goto err_iounmap;
+ }
+
+ error = nspire_keypad_chip_init(keypad);
+ if (error) {
+ dev_err(&pdev->dev, "unable to init keypad hardware\n");
+ goto err_iounmap;
+ }
+
+ error = request_irq(keypad->irq, nspire_keypad_irq, 0,
+ "nspire_keypad", keypad);
+ if (error) {
+ dev_err(&pdev->dev, "allocate irq %d failed\n", keypad->irq);
+ goto err_iounmap;
+ }
+
+ error = input_register_device(input);
+ if (error) {
+ dev_err(&pdev->dev,
+ "unable to register input device: %d\n", error);
+ goto err_free_irq;
+ }
+
+ platform_set_drvdata(pdev, keypad);
+
+ dev_info(&pdev->dev, "TI-NSPIRE keypad at %#08x ("
+ "scan_interval=%uus,row_delay=%uus"
+ "%s)\n", res->start,
+ keypad->options.row_delay,
+ keypad->options.scan_interval,
+ keypad->options.active_low ? ",active_low" : "");
+
+ return 0;
+
+err_free_irq:
+ free_irq(keypad->irq, keypad);
+err_iounmap:
+ iounmap(keypad->reg_base);
+err_free_mem_region:
+ release_mem_region(res->start, resource_size(res));
+err_free_mem:
+ input_free_device(input);
+ kfree(keypad);
+
+ clk_disable(clk);
+err_put_clk:
+ clk_unprepare(clk);
+ clk_put(clk);
+ return error;
+}
+
+static int nspire_keypad_remove(struct platform_device *pdev)
+{
+ struct nspire_keypad *keypad = platform_get_drvdata(pdev);
+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ free_irq(keypad->irq, keypad);
+
+ input_unregister_device(keypad->input);
+
+ iounmap(keypad->reg_base);
+ release_mem_region(res->start, resource_size(res));
+ kfree(keypad);
+
+ clk_disable(keypad->clk);
+ clk_unprepare(keypad->clk);
+ clk_put(keypad->clk);
+
+ return 0;
+}
+#ifdef CONFIG_OF
+static const struct of_device_id nspire_keypad_dt_match[] = {
+ { .compatible = "nspire-keypad" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, nspire_keypad_dt_match);
+#endif
+
+static struct platform_driver nspire_keypad_driver = {
+ .driver = {
+ .name = "nspire-keypad",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(nspire_keypad_dt_match),
+ },
+ .remove = nspire_keypad_remove,
+ .probe = nspire_keypad_probe
+};
+
+module_platform_driver(nspire_keypad_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("TI-NSPIRE Keypad Driver");
diff --git a/include/linux/platform_data/nspire-keypad.h b/include/linux/platform_data/nspire-keypad.h
new file mode 100644
index 0000000..03deb64
--- /dev/null
+++ b/include/linux/platform_data/nspire-keypad.h
@@ -0,0 +1,28 @@
+/*
+ * linux/include/linux/platform_data/nspire-keypad.h
+ *
+ * Copyright (C) 2012 Daniel Tang <tangrs@xxxxxxxxxxxx>
+ *
+ * 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.
+ *
+ */
+
+#ifndef _LINUX_NSPIRE_KEYPAD_H
+#define _LINUX_NSPIRE_KEYPAD_H
+
+#define KEYPAD_BITMASK_COLS 11
+#define KEYPAD_BITMASK_ROWS 8
+
+struct nspire_keypad_data {
+ struct matrix_keymap_data *keymap;
+
+ /* Maximum delay estimated assuming 33MHz APB */
+ u32 scan_interval; /* In microseconds (~2000us max) */
+ u32 row_delay; /* In microseconds (~500us max) */
+
+ bool active_low;
+};
+
+#endif
--
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