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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/mach-s3c2410/usb-simtec.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/arm/mach-s3c2410/usb-simtec.c')
-rw-r--r-- | arch/arm/mach-s3c2410/usb-simtec.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c2410/usb-simtec.c b/arch/arm/mach-s3c2410/usb-simtec.c new file mode 100644 index 0000000..7f2b613 --- /dev/null +++ b/arch/arm/mach-s3c2410/usb-simtec.c @@ -0,0 +1,113 @@ +/* linux/arch/arm/mach-s3c2410/usb-simtec.c + * + * Copyright (c) 2004 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. + * + * Modifications: + * 14-Sep-2004 BJD Created + * 18-Oct-2004 BJD Cleanups, and added code to report OC cleared +*/ + +#define DEBUG + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/list.h> +#include <linux/timer.h> +#include <linux/init.h> +#include <linux/device.h> + +#include <asm/mach/arch.h> +#include <asm/mach/map.h> +#include <asm/mach/irq.h> + +#include <asm/arch/bast-map.h> +#include <asm/arch/bast-irq.h> +#include <asm/arch/usb-control.h> +#include <asm/arch/regs-gpio.h> + +#include <asm/hardware.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/mach-types.h> + +#include "devs.h" +#include "usb-simtec.h" + +/* control power and monitor over-current events on various Simtec + * designed boards. +*/ + +static void +usb_simtec_powercontrol(int port, int to) +{ + pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to); + + if (port == 1) + s3c2410_gpio_setpin(S3C2410_GPB4, to ? 0:1); +} + +static irqreturn_t +usb_simtec_ocirq(int irq, void *pw, struct pt_regs *regs) +{ + struct s3c2410_hcd_info *info = (struct s3c2410_hcd_info *)pw; + + if (s3c2410_gpio_getpin(S3C2410_GPG10) == 0) { + pr_debug("usb_simtec: over-current irq (oc detected)\n"); + s3c2410_report_oc(info, 3); + } else { + pr_debug("usb_simtec: over-current irq (oc cleared)\n"); + s3c2410_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(IRQ_USBOC, usb_simtec_ocirq, SA_INTERRUPT, + "USB Over-current", info); + if (ret != 0) { + printk(KERN_ERR "failed to request usb oc irq\n"); + } + + set_irq_type(IRQ_USBOC, IRQT_BOTHEDGE); + } else { + free_irq(IRQ_USBOC, info); + } +} + +static struct s3c2410_hcd_info usb_simtec_info = { + .port[0] = { + .flags = S3C_HCDFLG_USED + }, + .port[1] = { + .flags = S3C_HCDFLG_USED + }, + + .power_control = usb_simtec_powercontrol, + .enable_oc = usb_simtec_enableoc, +}; + + +int usb_simtec_init(void) +{ + printk("USB Power Control, (c) 2004 Simtec Electronics\n"); + s3c_device_usb.dev.platform_data = &usb_simtec_info; + + s3c2410_gpio_cfgpin(S3C2410_GPB4, S3C2410_GPB4_OUTP); + s3c2410_gpio_setpin(S3C2410_GPB4, 1); + return 0; +} |