Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6
Linus Torvalds
commit
92118c739d
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@ -12,13 +12,20 @@ You can make this adapter from an old printer cable and solder things
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directly to the Butterfly. Or (if you have the parts and skills) you
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can come up with something fancier, providing ciruit protection to the
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Butterfly and the printer port, or with a better power supply than two
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signal pins from the printer port.
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signal pins from the printer port. Or for that matter, you can use
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similar cables to talk to many AVR boards, even a breadboard.
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This is more powerful than "ISP programming" cables since it lets kernel
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SPI protocol drivers interact with the AVR, and could even let the AVR
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issue interrupts to them. Later, your protocol driver should work
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easily with a "real SPI controller", instead of this bitbanger.
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The first cable connections will hook Linux up to one SPI bus, with the
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AVR and a DataFlash chip; and to the AVR reset line. This is all you
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need to reflash the firmware, and the pins are the standard Atmel "ISP"
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connector pins (used also on non-Butterfly AVR boards).
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connector pins (used also on non-Butterfly AVR boards). On the parport
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side this is like "sp12" programming cables.
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Signal Butterfly Parport (DB-25)
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------ --------- ---------------
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@ -40,10 +47,14 @@ by clearing PORTB.[0-3]); (b) configure the mtd_dataflash driver; and
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SELECT = J400.PB0/nSS = pin 17/C3,nSELECT
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GND = J400.GND = pin 24/GND
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The "USI" controller, using J405, can be used for a second SPI bus. That
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would let you talk to the AVR over SPI, running firmware that makes it act
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as an SPI slave, while letting either Linux or the AVR use the DataFlash.
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There are plenty of spare parport pins to wire this one up, such as:
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Or you could flash firmware making the AVR into an SPI slave (keeping the
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DataFlash in reset) and tweak the spi_butterfly driver to make it bind to
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the driver for your custom SPI-based protocol.
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The "USI" controller, using J405, can also be used for a second SPI bus.
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That would let you talk to the AVR using custom SPI-with-USI firmware,
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while letting either Linux or the AVR use the DataFlash. There are plenty
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of spare parport pins to wire this one up, such as:
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Signal Butterfly Parport (DB-25)
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------ --------- ---------------
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@ -19,6 +19,10 @@ extern void bus_remove_driver(struct device_driver *);
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extern void driver_detach(struct device_driver * drv);
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extern int driver_probe_device(struct device_driver *, struct device *);
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extern void sysdev_shutdown(void);
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extern int sysdev_suspend(pm_message_t state);
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extern int sysdev_resume(void);
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static inline struct class_device *to_class_dev(struct kobject *obj)
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{
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return container_of(obj, struct class_device, kobj);
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@ -9,10 +9,9 @@
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*/
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#include <linux/device.h>
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#include "../base.h"
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#include "power.h"
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extern int sysdev_resume(void);
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/**
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* resume_device - Restore state for one device.
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@ -12,6 +12,7 @@
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#include <linux/device.h>
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#include <asm/semaphore.h>
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#include "../base.h"
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#include "power.h"
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#define to_dev(node) container_of(node, struct device, kobj.entry)
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@ -28,7 +29,6 @@ extern struct subsystem devices_subsys;
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* they only get one called once when interrupts are disabled.
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*/
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extern int sysdev_shutdown(void);
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/**
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* device_shutdown - call ->shutdown() on each device to shutdown.
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@ -9,10 +9,9 @@
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*/
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#include <linux/device.h>
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#include "../base.h"
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#include "power.h"
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extern int sysdev_suspend(pm_message_t state);
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/*
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* The entries in the dpm_active list are in a depth first order, simply
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* because children are guaranteed to be discovered after parents, and
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@ -27,22 +27,30 @@
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static ssize_t state_show(struct device * dev, struct device_attribute *attr, char * buf)
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{
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return sprintf(buf, "%u\n", dev->power.power_state.event);
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if (dev->power.power_state.event)
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return sprintf(buf, "2\n");
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else
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return sprintf(buf, "0\n");
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}
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static ssize_t state_store(struct device * dev, struct device_attribute *attr, const char * buf, size_t n)
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{
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pm_message_t state;
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char * rest;
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int error = 0;
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int error = -EINVAL;
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state.event = simple_strtoul(buf, &rest, 10);
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if (*rest)
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return -EINVAL;
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if (state.event)
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state.event = PM_EVENT_SUSPEND;
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/* Older apps expected to write "3" here - confused with PCI D3 */
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if ((n == 1) && !strcmp(buf, "3"))
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error = dpm_runtime_suspend(dev, state);
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else
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if ((n == 1) && !strcmp(buf, "2"))
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error = dpm_runtime_suspend(dev, state);
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if ((n == 1) && !strcmp(buf, "0")) {
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dpm_runtime_resume(dev);
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error = 0;
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}
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return error ? error : n;
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}
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@ -21,8 +21,11 @@
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/pm.h>
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#include <linux/device.h>
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#include <asm/semaphore.h>
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#include "base.h"
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extern struct subsystem devices_subsys;
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#define to_sysdev(k) container_of(k, struct sys_device, kobj)
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@ -980,7 +980,7 @@ extern int drm_put_head(drm_head_t * head);
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extern unsigned int drm_debug;
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extern unsigned int drm_cards_limit;
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extern drm_head_t **drm_heads;
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extern struct drm_sysfs_class *drm_class;
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extern struct class *drm_class;
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extern struct proc_dir_entry *drm_proc_root;
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/* Proc support (drm_proc.h) */
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@ -1011,11 +1011,9 @@ extern void __drm_pci_free(drm_device_t * dev, drm_dma_handle_t * dmah);
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extern void drm_pci_free(drm_device_t * dev, drm_dma_handle_t * dmah);
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/* sysfs support (drm_sysfs.c) */
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struct drm_sysfs_class;
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extern struct drm_sysfs_class *drm_sysfs_create(struct module *owner,
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char *name);
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extern void drm_sysfs_destroy(struct drm_sysfs_class *cs);
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extern struct class_device *drm_sysfs_device_add(struct drm_sysfs_class *cs,
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extern struct class *drm_sysfs_create(struct module *owner, char *name);
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extern void drm_sysfs_destroy(struct class *cs);
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extern struct class_device *drm_sysfs_device_add(struct class *cs,
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drm_head_t *head);
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extern void drm_sysfs_device_remove(struct class_device *class_dev);
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@ -50,7 +50,7 @@ module_param_named(cards_limit, drm_cards_limit, int, 0444);
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module_param_named(debug, drm_debug, int, 0600);
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drm_head_t **drm_heads;
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struct drm_sysfs_class *drm_class;
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struct class *drm_class;
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struct proc_dir_entry *drm_proc_root;
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static int drm_fill_in_dev(drm_device_t * dev, struct pci_dev *pdev,
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@ -1,3 +1,4 @@
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/*
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* drm_sysfs.c - Modifications to drm_sysfs_class.c to support
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* extra sysfs attribute from DRM. Normal drm_sysfs_class
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@ -19,36 +20,6 @@
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#include "drm_core.h"
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#include "drmP.h"
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struct drm_sysfs_class {
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struct class_device_attribute attr;
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struct class class;
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};
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#define to_drm_sysfs_class(d) container_of(d, struct drm_sysfs_class, class)
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struct simple_dev {
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dev_t dev;
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struct class_device class_dev;
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};
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#define to_simple_dev(d) container_of(d, struct simple_dev, class_dev)
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static void release_simple_dev(struct class_device *class_dev)
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{
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struct simple_dev *s_dev = to_simple_dev(class_dev);
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kfree(s_dev);
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}
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static ssize_t show_dev(struct class_device *class_dev, char *buf)
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{
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struct simple_dev *s_dev = to_simple_dev(class_dev);
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return print_dev_t(buf, s_dev->dev);
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}
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static void drm_sysfs_class_release(struct class *class)
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{
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struct drm_sysfs_class *cs = to_drm_sysfs_class(class);
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kfree(cs);
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}
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/* Display the version of drm_core. This doesn't work right in current design */
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static ssize_t version_show(struct class *dev, char *buf)
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{
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@ -69,38 +40,16 @@ static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
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* Note, the pointer created here is to be destroyed when finished by making a
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* call to drm_sysfs_destroy().
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*/
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struct drm_sysfs_class *drm_sysfs_create(struct module *owner, char *name)
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struct class *drm_sysfs_create(struct module *owner, char *name)
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{
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struct drm_sysfs_class *cs;
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int retval;
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struct class *class;
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cs = kmalloc(sizeof(*cs), GFP_KERNEL);
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if (!cs) {
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retval = -ENOMEM;
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goto error;
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}
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memset(cs, 0x00, sizeof(*cs));
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class = class_create(owner, name);
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if (!class)
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return class;
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cs->class.name = name;
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cs->class.class_release = drm_sysfs_class_release;
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cs->class.release = release_simple_dev;
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cs->attr.attr.name = "dev";
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cs->attr.attr.mode = S_IRUGO;
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cs->attr.attr.owner = owner;
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cs->attr.show = show_dev;
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cs->attr.store = NULL;
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retval = class_register(&cs->class);
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if (retval)
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goto error;
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class_create_file(&cs->class, &class_attr_version);
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return cs;
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error:
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kfree(cs);
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return ERR_PTR(retval);
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class_create_file(class, &class_attr_version);
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return class;
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}
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/**
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@ -110,12 +59,13 @@ struct drm_sysfs_class *drm_sysfs_create(struct module *owner, char *name)
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* Note, the pointer to be destroyed must have been created with a call to
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* drm_sysfs_create().
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*/
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void drm_sysfs_destroy(struct drm_sysfs_class *cs)
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void drm_sysfs_destroy(struct class *class)
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{
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if ((cs == NULL) || (IS_ERR(cs)))
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if ((class == NULL) || (IS_ERR(class)))
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return;
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class_unregister(&cs->class);
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class_remove_file(class, &class_attr_version);
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class_destroy(class);
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}
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static ssize_t show_dri(struct class_device *class_device, char *buf)
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@ -132,7 +82,7 @@ static struct class_device_attribute class_device_attrs[] = {
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/**
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* drm_sysfs_device_add - adds a class device to sysfs for a character driver
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* @cs: pointer to the struct drm_sysfs_class that this device should be registered to.
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* @cs: pointer to the struct class that this device should be registered to.
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* @dev: the dev_t for the device to be added.
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* @device: a pointer to a struct device that is assiociated with this class device.
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* @fmt: string for the class device's name
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@ -141,46 +91,26 @@ static struct class_device_attribute class_device_attrs[] = {
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* class. A "dev" file will be created, showing the dev_t for the device. The
|
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* pointer to the struct class_device will be returned from the call. Any further
|
||||
* sysfs files that might be required can be created using this pointer.
|
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* Note: the struct drm_sysfs_class passed to this function must have previously been
|
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* Note: the struct class passed to this function must have previously been
|
||||
* created with a call to drm_sysfs_create().
|
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*/
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struct class_device *drm_sysfs_device_add(struct drm_sysfs_class *cs,
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drm_head_t *head)
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struct class_device *drm_sysfs_device_add(struct class *cs, drm_head_t *head)
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{
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struct simple_dev *s_dev = NULL;
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int i, retval;
|
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struct class_device *class_dev;
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||||
int i;
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||||
|
||||
if ((cs == NULL) || (IS_ERR(cs))) {
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retval = -ENODEV;
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goto error;
|
||||
}
|
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class_dev = class_device_create(cs, NULL,
|
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MKDEV(DRM_MAJOR, head->minor),
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&(head->dev->pdev)->dev,
|
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"card%d", head->minor);
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||||
if (!class_dev)
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return NULL;
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|
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s_dev = kmalloc(sizeof(*s_dev), GFP_KERNEL);
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if (!s_dev) {
|
||||
retval = -ENOMEM;
|
||||
goto error;
|
||||
}
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||||
memset(s_dev, 0x00, sizeof(*s_dev));
|
||||
|
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s_dev->dev = MKDEV(DRM_MAJOR, head->minor);
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s_dev->class_dev.dev = &(head->dev->pdev)->dev;
|
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s_dev->class_dev.class = &cs->class;
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|
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snprintf(s_dev->class_dev.class_id, BUS_ID_SIZE, "card%d", head->minor);
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retval = class_device_register(&s_dev->class_dev);
|
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if (retval)
|
||||
goto error;
|
||||
|
||||
class_device_create_file(&s_dev->class_dev, &cs->attr);
|
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class_set_devdata(&s_dev->class_dev, head);
|
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class_set_devdata(class_dev, head);
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
|
||||
class_device_create_file(&s_dev->class_dev, &class_device_attrs[i]);
|
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return &s_dev->class_dev;
|
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|
||||
error:
|
||||
kfree(s_dev);
|
||||
return ERR_PTR(retval);
|
||||
class_device_create_file(class_dev, &class_device_attrs[i]);
|
||||
return class_dev;
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -192,10 +122,9 @@ error:
|
|||
*/
|
||||
void drm_sysfs_device_remove(struct class_device *class_dev)
|
||||
{
|
||||
struct simple_dev *s_dev = to_simple_dev(class_dev);
|
||||
int i;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
|
||||
class_device_remove_file(&s_dev->class_dev, &class_device_attrs[i]);
|
||||
class_device_unregister(&s_dev->class_dev);
|
||||
class_device_remove_file(class_dev, &class_device_attrs[i]);
|
||||
class_device_unregister(class_dev);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1319,15 +1319,6 @@ static struct class ucm_class = {
|
|||
.release = ib_ucm_release_class_dev
|
||||
};
|
||||
|
||||
static ssize_t show_dev(struct class_device *class_dev, char *buf)
|
||||
{
|
||||
struct ib_ucm_device *dev;
|
||||
|
||||
dev = container_of(class_dev, struct ib_ucm_device, class_dev);
|
||||
return print_dev_t(buf, dev->dev.dev);
|
||||
}
|
||||
static CLASS_DEVICE_ATTR(dev, S_IRUGO, show_dev, NULL);
|
||||
|
||||
static ssize_t show_ibdev(struct class_device *class_dev, char *buf)
|
||||
{
|
||||
struct ib_ucm_device *dev;
|
||||
|
|
@ -1364,14 +1355,12 @@ static void ib_ucm_add_one(struct ib_device *device)
|
|||
|
||||
ucm_dev->class_dev.class = &ucm_class;
|
||||
ucm_dev->class_dev.dev = device->dma_device;
|
||||
ucm_dev->class_dev.devt = ucm_dev->dev.dev;
|
||||
snprintf(ucm_dev->class_dev.class_id, BUS_ID_SIZE, "ucm%d",
|
||||
ucm_dev->devnum);
|
||||
if (class_device_register(&ucm_dev->class_dev))
|
||||
goto err_cdev;
|
||||
|
||||
if (class_device_create_file(&ucm_dev->class_dev,
|
||||
&class_device_attr_dev))
|
||||
goto err_class;
|
||||
if (class_device_create_file(&ucm_dev->class_dev,
|
||||
&class_device_attr_ibdev))
|
||||
goto err_class;
|
||||
|
|
|
|||
|
|
@ -75,16 +75,6 @@ config SPI_BUTTERFLY
|
|||
inexpensive battery powered microcontroller evaluation board.
|
||||
This same cable can be used to flash new firmware.
|
||||
|
||||
config SPI_BUTTERFLY
|
||||
tristate "Parallel port adapter for AVR Butterfly (DEVELOPMENT)"
|
||||
depends on SPI_MASTER && PARPORT && EXPERIMENTAL
|
||||
select SPI_BITBANG
|
||||
help
|
||||
This uses a custom parallel port cable to connect to an AVR
|
||||
Butterfly <http://www.atmel.com/products/avr/butterfly>, an
|
||||
inexpensive battery powered microcontroller evaluation board.
|
||||
This same cable can be used to flash new firmware.
|
||||
|
||||
#
|
||||
# Add new SPI master controllers in alphabetical order above this line
|
||||
#
|
||||
|
|
|
|||
|
|
@ -163,21 +163,20 @@ static void butterfly_chipselect(struct spi_device *spi, int value)
|
|||
struct butterfly *pp = spidev_to_pp(spi);
|
||||
|
||||
/* set default clock polarity */
|
||||
if (value)
|
||||
if (value != BITBANG_CS_INACTIVE)
|
||||
setsck(spi, spi->mode & SPI_CPOL);
|
||||
|
||||
/* no chipselect on this USI link config */
|
||||
if (is_usidev(spi))
|
||||
return;
|
||||
|
||||
/* here, value == "activate or not" */
|
||||
|
||||
/* most PARPORT_CONTROL_* bits are negated */
|
||||
/* here, value == "activate or not";
|
||||
* most PARPORT_CONTROL_* bits are negated, so we must
|
||||
* morph it to value == "bit value to write in control register"
|
||||
*/
|
||||
if (spi_cs_bit == PARPORT_CONTROL_INIT)
|
||||
value = !value;
|
||||
|
||||
/* here, value == "bit value to write in control register" */
|
||||
|
||||
parport_frob_control(pp->port, spi_cs_bit, value ? spi_cs_bit : 0);
|
||||
}
|
||||
|
||||
|
|
@ -202,7 +201,9 @@ butterfly_txrx_word_mode0(struct spi_device *spi,
|
|||
|
||||
/* override default partitioning with cmdlinepart */
|
||||
static struct mtd_partition partitions[] = { {
|
||||
/* JFFS2 wants partitions of 4*N blocks for this device ... */
|
||||
/* JFFS2 wants partitions of 4*N blocks for this device,
|
||||
* so sectors 0 and 1 can't be partitions by themselves.
|
||||
*/
|
||||
|
||||
/* sector 0 = 8 pages * 264 bytes/page (1 block)
|
||||
* sector 1 = 248 pages * 264 bytes/page
|
||||
|
|
@ -316,8 +317,9 @@ static void butterfly_attach(struct parport *p)
|
|||
if (status < 0)
|
||||
goto clean2;
|
||||
|
||||
/* Bus 1 lets us talk to at45db041b (firmware disables AVR)
|
||||
* or AVR (firmware resets at45, acts as spi slave)
|
||||
/* Bus 1 lets us talk to at45db041b (firmware disables AVR SPI), AVR
|
||||
* (firmware resets at45, acts as spi slave) or neither (we ignore
|
||||
* both, AVR uses AT45). Here we expect firmware for the first option.
|
||||
*/
|
||||
pp->info[0].max_speed_hz = 15 * 1000 * 1000;
|
||||
strcpy(pp->info[0].modalias, "mtd_dataflash");
|
||||
|
|
@ -330,7 +332,9 @@ static void butterfly_attach(struct parport *p)
|
|||
pp->dataflash->dev.bus_id);
|
||||
|
||||
#ifdef HAVE_USI
|
||||
/* even more custom AVR firmware */
|
||||
/* Bus 2 is only for talking to the AVR, and it can work no
|
||||
* matter who masters bus 1; needs appropriate AVR firmware.
|
||||
*/
|
||||
pp->info[1].max_speed_hz = 10 /* ?? */ * 1000 * 1000;
|
||||
strcpy(pp->info[1].modalias, "butterfly");
|
||||
// pp->info[1].platform_data = ... TBD ... ;
|
||||
|
|
@ -378,13 +382,8 @@ static void butterfly_detach(struct parport *p)
|
|||
pp = butterfly;
|
||||
butterfly = NULL;
|
||||
|
||||
#ifdef HAVE_USI
|
||||
spi_unregister_device(pp->butterfly);
|
||||
pp->butterfly = NULL;
|
||||
#endif
|
||||
spi_unregister_device(pp->dataflash);
|
||||
pp->dataflash = NULL;
|
||||
|
||||
/* stop() unregisters child devices too */
|
||||
pdev = to_platform_device(pp->bitbang.master->cdev.dev);
|
||||
status = spi_bitbang_stop(&pp->bitbang);
|
||||
|
||||
/* turn off VCC */
|
||||
|
|
@ -394,8 +393,6 @@ static void butterfly_detach(struct parport *p)
|
|||
parport_release(pp->pd);
|
||||
parport_unregister_device(pp->pd);
|
||||
|
||||
pdev = to_platform_device(pp->bitbang.master->cdev.dev);
|
||||
|
||||
(void) spi_master_put(pp->bitbang.master);
|
||||
|
||||
platform_device_unregister(pdev);
|
||||
|
|
@ -420,4 +417,5 @@ static void __exit butterfly_exit(void)
|
|||
}
|
||||
module_exit(butterfly_exit);
|
||||
|
||||
MODULE_DESCRIPTION("Parport Adapter driver for AVR Butterfly");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
|
|||
|
|
@ -56,7 +56,7 @@ static u64 debugfs_u8_get(void *data)
|
|||
DEFINE_SIMPLE_ATTRIBUTE(fops_u8, debugfs_u8_get, debugfs_u8_set, "%llu\n");
|
||||
|
||||
/**
|
||||
* debugfs_create_u8 - create a file in the debugfs filesystem that is used to read and write a unsigned 8 bit value.
|
||||
* debugfs_create_u8 - create a file in the debugfs filesystem that is used to read and write an unsigned 8 bit value.
|
||||
*
|
||||
* @name: a pointer to a string containing the name of the file to create.
|
||||
* @mode: the permission that the file should have
|
||||
|
|
@ -98,7 +98,7 @@ static u64 debugfs_u16_get(void *data)
|
|||
DEFINE_SIMPLE_ATTRIBUTE(fops_u16, debugfs_u16_get, debugfs_u16_set, "%llu\n");
|
||||
|
||||
/**
|
||||
* debugfs_create_u16 - create a file in the debugfs filesystem that is used to read and write a unsigned 8 bit value.
|
||||
* debugfs_create_u16 - create a file in the debugfs filesystem that is used to read and write an unsigned 16 bit value.
|
||||
*
|
||||
* @name: a pointer to a string containing the name of the file to create.
|
||||
* @mode: the permission that the file should have
|
||||
|
|
@ -140,7 +140,7 @@ static u64 debugfs_u32_get(void *data)
|
|||
DEFINE_SIMPLE_ATTRIBUTE(fops_u32, debugfs_u32_get, debugfs_u32_set, "%llu\n");
|
||||
|
||||
/**
|
||||
* debugfs_create_u32 - create a file in the debugfs filesystem that is used to read and write a unsigned 8 bit value.
|
||||
* debugfs_create_u32 - create a file in the debugfs filesystem that is used to read and write an unsigned 32 bit value.
|
||||
*
|
||||
* @name: a pointer to a string containing the name of the file to create.
|
||||
* @mode: the permission that the file should have
|
||||
|
|
|
|||
|
|
@ -72,6 +72,8 @@ static int get_kobj_path_length(struct kobject *kobj)
|
|||
* Add 1 to strlen for leading '/' of each level.
|
||||
*/
|
||||
do {
|
||||
if (kobject_name(parent) == NULL)
|
||||
return 0;
|
||||
length += strlen(kobject_name(parent)) + 1;
|
||||
parent = parent->parent;
|
||||
} while (parent);
|
||||
|
|
@ -107,6 +109,8 @@ char *kobject_get_path(struct kobject *kobj, gfp_t gfp_mask)
|
|||
int len;
|
||||
|
||||
len = get_kobj_path_length(kobj);
|
||||
if (len == 0)
|
||||
return NULL;
|
||||
path = kmalloc(len, gfp_mask);
|
||||
if (!path)
|
||||
return NULL;
|
||||
|
|
@ -162,6 +166,11 @@ int kobject_add(struct kobject * kobj)
|
|||
return -ENOENT;
|
||||
if (!kobj->k_name)
|
||||
kobj->k_name = kobj->name;
|
||||
if (!kobj->k_name) {
|
||||
pr_debug("kobject attempted to be registered with no name!\n");
|
||||
WARN_ON(1);
|
||||
return -EINVAL;
|
||||
}
|
||||
parent = kobject_get(kobj->parent);
|
||||
|
||||
pr_debug("kobject %s: registering. parent: %s, set: %s\n",
|
||||
|
|
|
|||
|
|
@ -22,7 +22,7 @@
|
|||
#include <linux/kobject.h>
|
||||
#include <net/sock.h>
|
||||
|
||||
#define BUFFER_SIZE 1024 /* buffer for the variables */
|
||||
#define BUFFER_SIZE 2048 /* buffer for the variables */
|
||||
#define NUM_ENVP 32 /* number of env pointers */
|
||||
|
||||
#if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
|
||||
|
|
|
|||
Loading…
Reference in New Issue