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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>
This commit is contained in:
Daniel Tang 2013-06-11 18:40:17 +10:00 committed by Arnd Bergmann
parent d907849e0d
commit 9851ca5774
11 changed files with 307 additions and 0 deletions
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2
arch/arm/Kconfig
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@ -964,6 +964,8 @@ 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"

16
arch/arm/Kconfig.debug
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@ -309,6 +309,20 @@ 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_NOMADIK_UART
bool "Kernel low-level debugging messages via NOMADIK UART"
depends on ARCH_NOMADIK
@ -633,6 +647,8 @@ config DEBUG_LL_INCLUDE
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

1
arch/arm/Makefile
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@ -164,6 +164,7 @@ 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

28
arch/arm/include/debug/nspire.S Normal file
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@ -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

16
arch/arm/mach-nspire/Kconfig Normal file
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@ -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

2
arch/arm/mach-nspire/Makefile Normal file
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@ -0,0 +1,2 @@
obj-y += nspire.o
obj-y += clcd.o

0
arch/arm/mach-nspire/Makefile.boot Normal file
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119
arch/arm/mach-nspire/clcd.c Normal file
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@ -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);
}

14
arch/arm/mach-nspire/clcd.h Normal file
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@ -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);

20
arch/arm/mach-nspire/mmio.h Normal file
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@ -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

89
arch/arm/mach-nspire/nspire.c Normal file
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@ -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