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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/mach-s3c24xx/simtec-usb.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/mach-s3c24xx/simtec-usb.c')
-rw-r--r-- | kernel/arch/arm/mach-s3c24xx/simtec-usb.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-s3c24xx/simtec-usb.c b/kernel/arch/arm/mach-s3c24xx/simtec-usb.c new file mode 100644 index 000000000..b70aa66ef --- /dev/null +++ b/kernel/arch/arm/mach-s3c24xx/simtec-usb.c @@ -0,0 +1,130 @@ +/* linux/arch/arm/mach-s3c2410/usb-simtec.c + * + * Copyright 2004-2005 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * + * http://www.simtec.co.uk/products/EB2410ITX/ + * + * Simtec BAST and Thorcom VR1000 USB port support functions + * + * 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 DEBUG + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/list.h> +#include <linux/gpio.h> +#include <linux/timer.h> +#include <linux/init.h> +#include <linux/device.h> +#include <linux/io.h> + +#include <asm/mach/arch.h> +#include <asm/mach/map.h> +#include <asm/mach/irq.h> + +#include <mach/hardware.h> +#include <mach/gpio-samsung.h> +#include <asm/irq.h> + +#include <linux/platform_data/usb-ohci-s3c2410.h> +#include <plat/devs.h> + +#include "bast.h" +#include "simtec.h" + +/* control power and monitor over-current events on various Simtec + * designed boards. +*/ + +static unsigned int power_state[2]; + +static void +usb_simtec_powercontrol(int port, int to) +{ + pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to); + + power_state[port] = to; + + if (power_state[0] && power_state[1]) + gpio_set_value(S3C2410_GPB(4), 0); + else + gpio_set_value(S3C2410_GPB(4), 1); +} + +static irqreturn_t +usb_simtec_ocirq(int irq, void *pw) +{ + struct s3c2410_hcd_info *info = pw; + + if (gpio_get_value(S3C2410_GPG(10)) == 0) { + pr_debug("usb_simtec: over-current irq (oc detected)\n"); + s3c2410_usb_report_oc(info, 3); + } else { + pr_debug("usb_simtec: over-current irq (oc cleared)\n"); + s3c2410_usb_report_oc(info, 0); + } + + return IRQ_HANDLED; +} + +static void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on) +{ + int ret; + + if (on) { + ret = request_irq(BAST_IRQ_USBOC, usb_simtec_ocirq, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, + "USB Over-current", info); + if (ret != 0) { + printk(KERN_ERR "failed to request usb oc irq\n"); + } + } else { + free_irq(BAST_IRQ_USBOC, info); + } +} + +static struct s3c2410_hcd_info usb_simtec_info __initdata = { + .port[0] = { + .flags = S3C_HCDFLG_USED + }, + .port[1] = { + .flags = S3C_HCDFLG_USED + }, + + .power_control = usb_simtec_powercontrol, + .enable_oc = usb_simtec_enableoc, +}; + + +int __init usb_simtec_init(void) +{ + int ret; + + printk("USB Power Control, Copyright 2004 Simtec Electronics\n"); + + ret = gpio_request(S3C2410_GPB(4), "USB power control"); + if (ret < 0) { + pr_err("%s: failed to get GPB4\n", __func__); + return ret; + } + + ret = gpio_request(S3C2410_GPG(10), "USB overcurrent"); + if (ret < 0) { + pr_err("%s: failed to get GPG10\n", __func__); + gpio_free(S3C2410_GPB(4)); + return ret; + } + + /* turn power on */ + gpio_direction_output(S3C2410_GPB(4), 1); + gpio_direction_input(S3C2410_GPG(10)); + + s3c_ohci_set_platdata(&usb_simtec_info); + return 0; +} |