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linux-pinenote/arch/arm/mach-nomadik/cpu-8815.c
Robin Holt 7b6d864b48 reboot: arm: change reboot_mode to use enum reboot_mode 
Preparing to move the parsing of reboot= to generic kernel code forces
the change in reboot_mode handling to use the enum.

[akpm@linux-foundation.org: fix arch/arm/mach-socfpga/socfpga.c]
Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:29 -07:00

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/*
* Copyright STMicroelectronics, 2007.
*
* 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, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/types.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/amba/bus.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/irq.h>
#include <linux/dma-mapping.h>
#include <linux/platform_data/clk-nomadik.h>
#include <linux/clocksource.h>
#include <linux/of_irq.h>
#include <linux/of_gpio.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/mtd/fsmc.h>
#include <linux/gpio.h>
#include <linux/amba/mmci.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <asm/mach-types.h>
#include <asm/cacheflush.h>
#include <asm/hardware/cache-l2x0.h>
/*
* These are the only hard-coded address offsets we still have to use.
*/
#define NOMADIK_FSMC_BASE 0x10100000 /* FSMC registers */
#define NOMADIK_SDRAMC_BASE 0x10110000 /* SDRAM Controller */
#define NOMADIK_CLCDC_BASE 0x10120000 /* CLCD Controller */
#define NOMADIK_MDIF_BASE 0x10120000 /* MDIF */
#define NOMADIK_DMA0_BASE 0x10130000 /* DMA0 Controller */
#define NOMADIK_IC_BASE 0x10140000 /* Vectored Irq Controller */
#define NOMADIK_DMA1_BASE 0x10150000 /* DMA1 Controller */
#define NOMADIK_USB_BASE 0x10170000 /* USB-OTG conf reg base */
#define NOMADIK_CRYP_BASE 0x10180000 /* Crypto processor */
#define NOMADIK_SHA1_BASE 0x10190000 /* SHA-1 Processor */
#define NOMADIK_XTI_BASE 0x101A0000 /* XTI */
#define NOMADIK_RNG_BASE 0x101B0000 /* Random number generator */
#define NOMADIK_SRC_BASE 0x101E0000 /* SRC base */
#define NOMADIK_WDOG_BASE 0x101E1000 /* Watchdog */
#define NOMADIK_MTU0_BASE 0x101E2000 /* Multiple Timer 0 */
#define NOMADIK_MTU1_BASE 0x101E3000 /* Multiple Timer 1 */
#define NOMADIK_GPIO0_BASE 0x101E4000 /* GPIO0 */
#define NOMADIK_GPIO1_BASE 0x101E5000 /* GPIO1 */
#define NOMADIK_GPIO2_BASE 0x101E6000 /* GPIO2 */
#define NOMADIK_GPIO3_BASE 0x101E7000 /* GPIO3 */
#define NOMADIK_RTC_BASE 0x101E8000 /* Real Time Clock base */
#define NOMADIK_PMU_BASE 0x101E9000 /* Power Management Unit */
#define NOMADIK_OWM_BASE 0x101EA000 /* One wire master */
#define NOMADIK_SCR_BASE 0x101EF000 /* Secure Control registers */
#define NOMADIK_MSP2_BASE 0x101F0000 /* MSP 2 interface */
#define NOMADIK_MSP1_BASE 0x101F1000 /* MSP 1 interface */
#define NOMADIK_UART2_BASE 0x101F2000 /* UART 2 interface */
#define NOMADIK_SSIRx_BASE 0x101F3000 /* SSI 8-ch rx interface */
#define NOMADIK_SSITx_BASE 0x101F4000 /* SSI 8-ch tx interface */
#define NOMADIK_MSHC_BASE 0x101F5000 /* Memory Stick(Pro) Host */
#define NOMADIK_SDI_BASE 0x101F6000 /* SD-card/MM-Card */
#define NOMADIK_I2C1_BASE 0x101F7000 /* I2C1 interface */
#define NOMADIK_I2C0_BASE 0x101F8000 /* I2C0 interface */
#define NOMADIK_MSP0_BASE 0x101F9000 /* MSP 0 interface */
#define NOMADIK_FIRDA_BASE 0x101FA000 /* FIrDA interface */
#define NOMADIK_UART1_BASE 0x101FB000 /* UART 1 interface */
#define NOMADIK_SSP_BASE 0x101FC000 /* SSP interface */
#define NOMADIK_UART0_BASE 0x101FD000 /* UART 0 interface */
#define NOMADIK_SGA_BASE 0x101FE000 /* SGA interface */
#define NOMADIK_L2CC_BASE 0x10210000 /* L2 Cache controller */
#define NOMADIK_UART1_VBASE 0xF01FB000
/* This is needed for LL-debug/earlyprintk/debug-macro.S */
static struct map_desc cpu8815_io_desc[] __initdata = {
{
.virtual = NOMADIK_UART1_VBASE,
.pfn = __phys_to_pfn(NOMADIK_UART1_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
static void __init cpu8815_map_io(void)
{
iotable_init(cpu8815_io_desc, ARRAY_SIZE(cpu8815_io_desc));
}
static void cpu8815_restart(enum reboot_mode mode, const char *cmd)
{
void __iomem *srcbase = ioremap(NOMADIK_SRC_BASE, SZ_4K);
/* FIXME: use egpio when implemented */
/* Write anything to Reset status register */
writel(1, srcbase + 0x18);
}
/* Initial value for SRC control register: all timers use MXTAL/8 source */
#define SRC_CR_INIT_MASK 0x00007fff
#define SRC_CR_INIT_VAL 0x2aaa8000
static void __init cpu8815_timer_init_of(void)
{
struct device_node *mtu;
void __iomem *base;
int irq;
u32 src_cr;
/* We need this to be up now */
nomadik_clk_init();
mtu = of_find_node_by_path("/mtu@101e2000");
if (!mtu)
return;
base = of_iomap(mtu, 0);
if (WARN_ON(!base))
return;
irq = irq_of_parse_and_map(mtu, 0);
pr_info("Remapped MTU @ %p, irq: %d\n", base, irq);
/* Configure timer sources in "system reset controller" ctrl reg */
src_cr = readl(base);
src_cr &= SRC_CR_INIT_MASK;
src_cr |= SRC_CR_INIT_VAL;
writel(src_cr, base);
clocksource_of_init();
}
static struct fsmc_nand_timings cpu8815_nand_timings = {
.thiz = 0,
.thold = 0x10,
.twait = 0x0A,
.tset = 0,
};
static struct fsmc_nand_platform_data cpu8815_nand_data = {
.nand_timings = &cpu8815_nand_timings,
};
/*
* The SMSC911x IRQ is connected to a GPIO pin, but the driver expects
* to simply request an IRQ passed as a resource. So the GPIO pin needs
* to be requested by this hog and set as input.
*/
static int __init cpu8815_eth_init(void)
{
struct device_node *eth;
int gpio, irq, err;
eth = of_find_node_by_path("/usb-s8815/ethernet-gpio");
if (!eth) {
pr_info("could not find any ethernet GPIO\n");
return 0;
}
gpio = of_get_gpio(eth, 0);
err = gpio_request(gpio, "eth_irq");
if (err) {
pr_info("failed to request ethernet GPIO\n");
return -ENODEV;
}
err = gpio_direction_input(gpio);
if (err) {
pr_info("failed to set ethernet GPIO as input\n");
return -ENODEV;
}
irq = gpio_to_irq(gpio);
pr_info("enabled USB-S8815 ethernet GPIO %d, IRQ %d\n", gpio, irq);
return 0;
}
device_initcall(cpu8815_eth_init);
/*
* TODO:
* cannot be set from device tree, convert to a proper DT
* binding.
*/
static struct mmci_platform_data mmcsd_plat_data = {
.ocr_mask = MMC_VDD_29_30,
};
/*
* This GPIO pin turns on a line that is used to detect card insertion
* on this board.
*/
static int __init cpu8815_mmcsd_init(void)
{
struct device_node *cdbias;
int gpio, err;
cdbias = of_find_node_by_path("/usb-s8815/mmcsd-gpio");
if (!cdbias) {
pr_info("could not find MMC/SD card detect bias node\n");
return 0;
}
gpio = of_get_gpio(cdbias, 0);
if (gpio < 0) {
pr_info("could not obtain MMC/SD card detect bias GPIO\n");
return 0;
}
err = gpio_request(gpio, "card detect bias");
if (err) {
pr_info("failed to request card detect bias GPIO %d\n", gpio);
return -ENODEV;
}
err = gpio_direction_output(gpio, 0);
if (err){
pr_info("failed to set GPIO %d as output, low\n", gpio);
return err;
}
pr_info("enabled USB-S8815 CD bias GPIO %d, low\n", gpio);
return 0;
}
device_initcall(cpu8815_mmcsd_init);
/* These are mostly to get the right device names for the clock lookups */
static struct of_dev_auxdata cpu8815_auxdata_lookup[] __initdata = {
OF_DEV_AUXDATA("stericsson,fsmc-nand", NOMADIK_FSMC_BASE,
NULL, &cpu8815_nand_data),
OF_DEV_AUXDATA("arm,primecell", NOMADIK_SDI_BASE,
NULL, &mmcsd_plat_data),
{ /* sentinel */ },
};
static void __init cpu8815_init_of(void)
{
#ifdef CONFIG_CACHE_L2X0
/* At full speed latency must be >=2, so 0x249 in low bits */
l2x0_of_init(0x00730249, 0xfe000fff);
#endif
of_platform_populate(NULL, of_default_bus_match_table,
cpu8815_auxdata_lookup, NULL);
}
static const char * cpu8815_board_compat[] = {
"calaosystems,usb-s8815",
NULL,
};
DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815")
.map_io = cpu8815_map_io,
.init_time = cpu8815_timer_init_of,
.init_machine = cpu8815_init_of,
.restart = cpu8815_restart,
.dt_compat = cpu8815_board_compat,
MACHINE_END
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