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5a0e3ad6af
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
449 lines
11 KiB
C
449 lines
11 KiB
C
/* -*- linux-c -*-
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* Cypress USB Thermometer driver
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*
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* Copyright (c) 2004 Erik Rigtorp <erkki@linux.nu> <erik@rigtorp.com>
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*
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* This driver works with Elektor magazine USB Interface as published in
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* issue #291. It should also work with the original starter kit/demo board
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* from Cypress.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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#define DRIVER_VERSION "v1.0"
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#define DRIVER_AUTHOR "Erik Rigtorp"
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#define DRIVER_DESC "Cypress USB Thermometer driver"
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#define USB_SKEL_VENDOR_ID 0x04b4
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#define USB_SKEL_PRODUCT_ID 0x0002
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static const struct usb_device_id id_table[] = {
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{ USB_DEVICE(USB_SKEL_VENDOR_ID, USB_SKEL_PRODUCT_ID) },
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{ }
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};
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MODULE_DEVICE_TABLE (usb, id_table);
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/* Structure to hold all of our device specific stuff */
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struct usb_cytherm {
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struct usb_device *udev; /* save off the usb device pointer */
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struct usb_interface *interface; /* the interface for this device */
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int brightness;
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};
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/* local function prototypes */
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static int cytherm_probe(struct usb_interface *interface,
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const struct usb_device_id *id);
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static void cytherm_disconnect(struct usb_interface *interface);
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/* usb specific object needed to register this driver with the usb subsystem */
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static struct usb_driver cytherm_driver = {
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.name = "cytherm",
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.probe = cytherm_probe,
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.disconnect = cytherm_disconnect,
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.id_table = id_table,
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};
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/* Vendor requests */
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/* They all operate on one byte at a time */
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#define PING 0x00
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#define READ_ROM 0x01 /* Reads form ROM, value = address */
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#define READ_RAM 0x02 /* Reads form RAM, value = address */
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#define WRITE_RAM 0x03 /* Write to RAM, value = address, index = data */
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#define READ_PORT 0x04 /* Reads from port, value = address */
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#define WRITE_PORT 0x05 /* Write to port, value = address, index = data */
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/* Send a vendor command to device */
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static int vendor_command(struct usb_device *dev, unsigned char request,
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unsigned char value, unsigned char index,
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void *buf, int size)
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{
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return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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request,
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
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value,
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index, buf, size,
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USB_CTRL_GET_TIMEOUT);
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}
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#define BRIGHTNESS 0x2c /* RAM location for brightness value */
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#define BRIGHTNESS_SEM 0x2b /* RAM location for brightness semaphore */
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static ssize_t show_brightness(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_interface *intf = to_usb_interface(dev);
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struct usb_cytherm *cytherm = usb_get_intfdata(intf);
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return sprintf(buf, "%i", cytherm->brightness);
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}
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static ssize_t set_brightness(struct device *dev, struct device_attribute *attr, const char *buf,
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size_t count)
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{
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struct usb_interface *intf = to_usb_interface(dev);
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struct usb_cytherm *cytherm = usb_get_intfdata(intf);
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unsigned char *buffer;
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int retval;
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buffer = kmalloc(8, GFP_KERNEL);
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if (!buffer) {
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dev_err(&cytherm->udev->dev, "out of memory\n");
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return 0;
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}
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cytherm->brightness = simple_strtoul(buf, NULL, 10);
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if (cytherm->brightness > 0xFF)
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cytherm->brightness = 0xFF;
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else if (cytherm->brightness < 0)
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cytherm->brightness = 0;
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/* Set brightness */
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retval = vendor_command(cytherm->udev, WRITE_RAM, BRIGHTNESS,
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cytherm->brightness, buffer, 8);
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if (retval)
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dev_dbg(&cytherm->udev->dev, "retval = %d\n", retval);
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/* Inform µC that we have changed the brightness setting */
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retval = vendor_command(cytherm->udev, WRITE_RAM, BRIGHTNESS_SEM,
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0x01, buffer, 8);
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if (retval)
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dev_dbg(&cytherm->udev->dev, "retval = %d\n", retval);
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kfree(buffer);
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return count;
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}
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static DEVICE_ATTR(brightness, S_IRUGO | S_IWUSR | S_IWGRP,
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show_brightness, set_brightness);
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#define TEMP 0x33 /* RAM location for temperature */
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#define SIGN 0x34 /* RAM location for temperature sign */
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static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_interface *intf = to_usb_interface(dev);
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struct usb_cytherm *cytherm = usb_get_intfdata(intf);
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int retval;
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unsigned char *buffer;
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int temp, sign;
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buffer = kmalloc(8, GFP_KERNEL);
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if (!buffer) {
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dev_err(&cytherm->udev->dev, "out of memory\n");
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return 0;
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}
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/* read temperature */
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retval = vendor_command(cytherm->udev, READ_RAM, TEMP, 0, buffer, 8);
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if (retval)
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dev_dbg(&cytherm->udev->dev, "retval = %d\n", retval);
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temp = buffer[1];
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/* read sign */
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retval = vendor_command(cytherm->udev, READ_RAM, SIGN, 0, buffer, 8);
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if (retval)
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dev_dbg(&cytherm->udev->dev, "retval = %d\n", retval);
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sign = buffer[1];
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kfree(buffer);
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return sprintf(buf, "%c%i.%i", sign ? '-' : '+', temp >> 1,
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5*(temp - ((temp >> 1) << 1)));
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}
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static ssize_t set_temp(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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return count;
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}
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static DEVICE_ATTR(temp, S_IRUGO, show_temp, set_temp);
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#define BUTTON 0x7a
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static ssize_t show_button(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_interface *intf = to_usb_interface(dev);
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struct usb_cytherm *cytherm = usb_get_intfdata(intf);
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int retval;
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unsigned char *buffer;
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buffer = kmalloc(8, GFP_KERNEL);
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if (!buffer) {
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dev_err(&cytherm->udev->dev, "out of memory\n");
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return 0;
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}
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/* check button */
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retval = vendor_command(cytherm->udev, READ_RAM, BUTTON, 0, buffer, 8);
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if (retval)
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dev_dbg(&cytherm->udev->dev, "retval = %d\n", retval);
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retval = buffer[1];
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kfree(buffer);
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if (retval)
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return sprintf(buf, "1");
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else
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return sprintf(buf, "0");
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}
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static ssize_t set_button(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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return count;
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}
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static DEVICE_ATTR(button, S_IRUGO, show_button, set_button);
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static ssize_t show_port0(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_interface *intf = to_usb_interface(dev);
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struct usb_cytherm *cytherm = usb_get_intfdata(intf);
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int retval;
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unsigned char *buffer;
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buffer = kmalloc(8, GFP_KERNEL);
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if (!buffer) {
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dev_err(&cytherm->udev->dev, "out of memory\n");
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return 0;
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}
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retval = vendor_command(cytherm->udev, READ_PORT, 0, 0, buffer, 8);
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if (retval)
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dev_dbg(&cytherm->udev->dev, "retval = %d\n", retval);
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retval = buffer[1];
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kfree(buffer);
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return sprintf(buf, "%d", retval);
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}
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static ssize_t set_port0(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct usb_interface *intf = to_usb_interface(dev);
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struct usb_cytherm *cytherm = usb_get_intfdata(intf);
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unsigned char *buffer;
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int retval;
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int tmp;
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buffer = kmalloc(8, GFP_KERNEL);
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if (!buffer) {
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dev_err(&cytherm->udev->dev, "out of memory\n");
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return 0;
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}
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tmp = simple_strtoul(buf, NULL, 10);
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if (tmp > 0xFF)
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tmp = 0xFF;
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else if (tmp < 0)
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tmp = 0;
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retval = vendor_command(cytherm->udev, WRITE_PORT, 0,
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tmp, buffer, 8);
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if (retval)
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dev_dbg(&cytherm->udev->dev, "retval = %d\n", retval);
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kfree(buffer);
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return count;
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}
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static DEVICE_ATTR(port0, S_IRUGO | S_IWUSR | S_IWGRP, show_port0, set_port0);
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static ssize_t show_port1(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_interface *intf = to_usb_interface(dev);
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struct usb_cytherm *cytherm = usb_get_intfdata(intf);
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int retval;
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unsigned char *buffer;
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buffer = kmalloc(8, GFP_KERNEL);
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if (!buffer) {
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dev_err(&cytherm->udev->dev, "out of memory\n");
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return 0;
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}
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retval = vendor_command(cytherm->udev, READ_PORT, 1, 0, buffer, 8);
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if (retval)
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dev_dbg(&cytherm->udev->dev, "retval = %d\n", retval);
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retval = buffer[1];
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kfree(buffer);
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return sprintf(buf, "%d", retval);
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}
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static ssize_t set_port1(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct usb_interface *intf = to_usb_interface(dev);
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struct usb_cytherm *cytherm = usb_get_intfdata(intf);
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unsigned char *buffer;
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int retval;
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int tmp;
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buffer = kmalloc(8, GFP_KERNEL);
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if (!buffer) {
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dev_err(&cytherm->udev->dev, "out of memory\n");
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return 0;
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}
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tmp = simple_strtoul(buf, NULL, 10);
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if (tmp > 0xFF)
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tmp = 0xFF;
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else if (tmp < 0)
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tmp = 0;
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retval = vendor_command(cytherm->udev, WRITE_PORT, 1,
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tmp, buffer, 8);
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if (retval)
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dev_dbg(&cytherm->udev->dev, "retval = %d\n", retval);
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kfree(buffer);
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return count;
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}
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static DEVICE_ATTR(port1, S_IRUGO | S_IWUSR | S_IWGRP, show_port1, set_port1);
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static int cytherm_probe(struct usb_interface *interface,
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const struct usb_device_id *id)
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{
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struct usb_device *udev = interface_to_usbdev(interface);
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struct usb_cytherm *dev = NULL;
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int retval = -ENOMEM;
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dev = kzalloc (sizeof(struct usb_cytherm), GFP_KERNEL);
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if (dev == NULL) {
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dev_err (&interface->dev, "Out of memory\n");
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goto error_mem;
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}
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dev->udev = usb_get_dev(udev);
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usb_set_intfdata (interface, dev);
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dev->brightness = 0xFF;
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retval = device_create_file(&interface->dev, &dev_attr_brightness);
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if (retval)
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goto error;
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retval = device_create_file(&interface->dev, &dev_attr_temp);
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if (retval)
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goto error;
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retval = device_create_file(&interface->dev, &dev_attr_button);
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if (retval)
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goto error;
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retval = device_create_file(&interface->dev, &dev_attr_port0);
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if (retval)
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goto error;
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retval = device_create_file(&interface->dev, &dev_attr_port1);
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if (retval)
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goto error;
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dev_info (&interface->dev,
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"Cypress thermometer device now attached\n");
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return 0;
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error:
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device_remove_file(&interface->dev, &dev_attr_brightness);
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device_remove_file(&interface->dev, &dev_attr_temp);
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device_remove_file(&interface->dev, &dev_attr_button);
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device_remove_file(&interface->dev, &dev_attr_port0);
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device_remove_file(&interface->dev, &dev_attr_port1);
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usb_set_intfdata (interface, NULL);
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usb_put_dev(dev->udev);
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kfree(dev);
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error_mem:
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return retval;
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}
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static void cytherm_disconnect(struct usb_interface *interface)
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{
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struct usb_cytherm *dev;
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dev = usb_get_intfdata (interface);
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device_remove_file(&interface->dev, &dev_attr_brightness);
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device_remove_file(&interface->dev, &dev_attr_temp);
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device_remove_file(&interface->dev, &dev_attr_button);
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device_remove_file(&interface->dev, &dev_attr_port0);
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device_remove_file(&interface->dev, &dev_attr_port1);
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/* first remove the files, then NULL the pointer */
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usb_set_intfdata (interface, NULL);
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usb_put_dev(dev->udev);
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kfree(dev);
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dev_info(&interface->dev, "Cypress thermometer now disconnected\n");
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}
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static int __init usb_cytherm_init(void)
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{
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int result;
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result = usb_register(&cytherm_driver);
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if (result) {
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printk(KERN_ERR KBUILD_MODNAME ": usb_register failed! "
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"Error number: %d\n", result);
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return result;
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}
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printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
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DRIVER_DESC "\n");
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return 0;
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}
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static void __exit usb_cytherm_exit(void)
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{
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usb_deregister(&cytherm_driver);
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}
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module_init (usb_cytherm_init);
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module_exit (usb_cytherm_exit);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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