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![Heiner Kallweit](/assets/img/avatar_default.png)
The hid-led driver works fine under 4.8.0, however with the next kernel from today I get this: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 2578 at drivers/usb/core/hcd.c:1584 usb_hcd_map_urb_for_dma+0x373/0x550 [usbcore] transfer buffer not dma capable Modules linked in: hid_led(+) usbhid vfat fat ir_sony_decoder iwlmvm led_class mac80211 snd_hda_codec_realtek snd_hda_codec_generic x86_pkg_temp_thermal iwlwifi crc32c_intel snd_hda_codec_hdmi i2c_i801 i2c_smbus snd_hda_intel cfg80211 snd_hda_codec snd_hda_core snd_pcm r8169 snd_timer mei_me mii snd mei ir_lirc_codec lirc_dev nuvoton_cir rc_core btusb btintel bluetooth rfkill usb_storage efivarfs ipv6 ehci_pci ehci_hcd xhci_pci xhci_hcd usbcore usb_common ext4 jbd2 mbcache ahci libahci libata CPU: 0 PID: 2578 Comm: systemd-udevd Not tainted 4.8.0-rc8-next-20161003 #1 Hardware name: ZOTAC ZBOX-CI321NANO/ZBOX-CI321NANO, BIOS B246P105 06/01/2015 ffffc90003dbb7e0 ffffffff81280425 ffffc90003dbb830 0000000000000000 ffffc90003dbb820 ffffffff8105b086 0000063003dbb800 ffff88006f374480 0000000000000000 0000000000000000 0000000000000001 ffff880079544000 Call Trace: [<ffffffff81280425>] dump_stack+0x68/0x93 [<ffffffff8105b086>] __warn+0xc6/0xe0 [<ffffffff8105b0ea>] warn_slowpath_fmt+0x4a/0x50 [<ffffffffa0143a43>] usb_hcd_map_urb_for_dma+0x373/0x550 [usbcore] [<ffffffffa01441b6>] usb_hcd_submit_urb+0x316/0x9c0 [usbcore] [<ffffffff810bce80>] ? rcu_read_lock_sched_held+0x40/0x80 [<ffffffff810e0043>] ? module_assert_mutex_or_preempt+0x13/0x50 [<ffffffff810e0c07>] ? __module_address+0x27/0xf0 [<ffffffffa01456e4>] usb_submit_urb+0x2c4/0x520 [usbcore] [<ffffffffa0145fea>] usb_start_wait_urb+0x5a/0xe0 [usbcore] [<ffffffffa014612c>] usb_control_msg+0xbc/0xf0 [usbcore] [<ffffffff810e0c07>] ? __module_address+0x27/0xf0 [<ffffffffa079a724>] usbhid_raw_request+0xa4/0x180 [usbhid] [<ffffffffa07a93b1>] hidled_recv+0x71/0xe0 [hid_led] [<ffffffffa07a947d>] thingm_init+0x2d/0x50 [hid_led] [<ffffffffa07a969b>] hidled_probe+0xcb/0x24a [hid_led] [<ffffffff814d96f2>] hid_device_probe+0xd2/0x150 [<ffffffff8146023d>] driver_probe_device+0x1fd/0x2c0 [<ffffffff8146039a>] __driver_attach+0x9a/0xa0 [<ffffffff81460300>] ? driver_probe_device+0x2c0/0x2c0 [<ffffffff8145e25d>] bus_for_each_dev+0x5d/0x90 [<ffffffff8145fa79>] driver_attach+0x19/0x20 [<ffffffff8145f5ff>] bus_add_driver+0x11f/0x220 [<ffffffffa07ac000>] ? 0xffffffffa07ac000 [<ffffffff8146086b>] driver_register+0x5b/0xd0 [<ffffffffa07ac000>] ? 0xffffffffa07ac000 [<ffffffff814d83d1>] __hid_register_driver+0x61/0xa0 [<ffffffffa07ac01e>] hidled_driver_init+0x1e/0x20 [hid_led] [<ffffffff81000408>] do_one_initcall+0x38/0x150 [<ffffffff810bce80>] ? rcu_read_lock_sched_held+0x40/0x80 [<ffffffff81194ca0>] ? kmem_cache_alloc_trace+0x1d0/0x230 [<ffffffff811342f9>] do_init_module+0x5a/0x1cb [<ffffffff810e3862>] load_module+0x1e42/0x2530 [<ffffffff810e0990>] ? __symbol_put+0x50/0x50 [<ffffffff810dfc50>] ? show_coresize+0x30/0x30 [<ffffffff811ad650>] ? kernel_read_file+0x100/0x190 [<ffffffff811ad794>] ? kernel_read_file_from_fd+0x44/0x70 [<ffffffff810e415a>] SYSC_finit_module+0xba/0xc0 [<ffffffff810e4179>] SyS_finit_module+0x9/0x10 [<ffffffff815e082a>] entry_SYSCALL_64_fastpath+0x18/0xad ---[ end trace c9e6ea27003ecf9e ]--- Fix this by using a kmalloc'ed buffer when calling hid_hw_raw_request. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
538 lines
12 KiB
C
538 lines
12 KiB
C
/*
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* Simple USB RGB LED driver
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*
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* Copyright 2016 Heiner Kallweit <hkallweit1@gmail.com>
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* Based on drivers/hid/hid-thingm.c and
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* drivers/usb/misc/usbled.c
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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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#include <linux/hid.h>
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#include <linux/hidraw.h>
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#include <linux/leds.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include "hid-ids.h"
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enum hidled_report_type {
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RAW_REQUEST,
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OUTPUT_REPORT
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};
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enum hidled_type {
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RISO_KAGAKU,
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DREAM_CHEEKY,
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THINGM,
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DELCOM,
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LUXAFOR,
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};
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static unsigned const char riso_kagaku_tbl[] = {
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/* R+2G+4B -> riso kagaku color index */
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[0] = 0, /* black */
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[1] = 2, /* red */
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[2] = 1, /* green */
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[3] = 5, /* yellow */
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[4] = 3, /* blue */
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[5] = 6, /* magenta */
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[6] = 4, /* cyan */
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[7] = 7 /* white */
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};
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#define RISO_KAGAKU_IX(r, g, b) riso_kagaku_tbl[((r)?1:0)+((g)?2:0)+((b)?4:0)]
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union delcom_packet {
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__u8 data[8];
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struct {
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__u8 major_cmd;
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__u8 minor_cmd;
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__u8 data_lsb;
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__u8 data_msb;
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} tx;
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struct {
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__u8 cmd;
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} rx;
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struct {
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__le16 family_code;
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__le16 security_code;
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__u8 fw_version;
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} fw;
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};
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#define DELCOM_GREEN_LED 0
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#define DELCOM_RED_LED 1
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#define DELCOM_BLUE_LED 2
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struct hidled_device;
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struct hidled_rgb;
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struct hidled_config {
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enum hidled_type type;
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const char *name;
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const char *short_name;
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enum led_brightness max_brightness;
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int num_leds;
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size_t report_size;
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enum hidled_report_type report_type;
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int (*init)(struct hidled_device *ldev);
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int (*write)(struct led_classdev *cdev, enum led_brightness br);
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};
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struct hidled_led {
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struct led_classdev cdev;
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struct hidled_rgb *rgb;
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char name[32];
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};
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struct hidled_rgb {
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struct hidled_device *ldev;
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struct hidled_led red;
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struct hidled_led green;
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struct hidled_led blue;
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u8 num;
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};
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struct hidled_device {
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const struct hidled_config *config;
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struct hid_device *hdev;
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struct hidled_rgb *rgb;
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u8 *buf;
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struct mutex lock;
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};
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#define MAX_REPORT_SIZE 16
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#define to_hidled_led(arg) container_of(arg, struct hidled_led, cdev)
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static bool riso_kagaku_switch_green_blue;
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module_param(riso_kagaku_switch_green_blue, bool, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(riso_kagaku_switch_green_blue,
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"switch green and blue RGB component for Riso Kagaku devices");
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static int hidled_send(struct hidled_device *ldev, __u8 *buf)
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{
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int ret;
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mutex_lock(&ldev->lock);
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/*
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* buffer provided to hid_hw_raw_request must not be on the stack
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* and must not be part of a data structure
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*/
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memcpy(ldev->buf, buf, ldev->config->report_size);
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if (ldev->config->report_type == RAW_REQUEST)
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ret = hid_hw_raw_request(ldev->hdev, buf[0], ldev->buf,
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ldev->config->report_size,
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HID_FEATURE_REPORT,
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HID_REQ_SET_REPORT);
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else if (ldev->config->report_type == OUTPUT_REPORT)
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ret = hid_hw_output_report(ldev->hdev, ldev->buf,
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ldev->config->report_size);
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else
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ret = -EINVAL;
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mutex_unlock(&ldev->lock);
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if (ret < 0)
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return ret;
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return ret == ldev->config->report_size ? 0 : -EMSGSIZE;
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}
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/* reading data is supported for report type RAW_REQUEST only */
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static int hidled_recv(struct hidled_device *ldev, __u8 *buf)
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{
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int ret;
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if (ldev->config->report_type != RAW_REQUEST)
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return -EINVAL;
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mutex_lock(&ldev->lock);
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memcpy(ldev->buf, buf, ldev->config->report_size);
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ret = hid_hw_raw_request(ldev->hdev, buf[0], ldev->buf,
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ldev->config->report_size,
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HID_FEATURE_REPORT,
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HID_REQ_SET_REPORT);
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if (ret < 0)
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goto err;
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ret = hid_hw_raw_request(ldev->hdev, buf[0], ldev->buf,
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ldev->config->report_size,
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HID_FEATURE_REPORT,
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HID_REQ_GET_REPORT);
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memcpy(buf, ldev->buf, ldev->config->report_size);
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err:
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mutex_unlock(&ldev->lock);
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return ret < 0 ? ret : 0;
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}
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static u8 riso_kagaku_index(struct hidled_rgb *rgb)
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{
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enum led_brightness r, g, b;
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r = rgb->red.cdev.brightness;
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g = rgb->green.cdev.brightness;
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b = rgb->blue.cdev.brightness;
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if (riso_kagaku_switch_green_blue)
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return RISO_KAGAKU_IX(r, b, g);
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else
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return RISO_KAGAKU_IX(r, g, b);
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}
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static int riso_kagaku_write(struct led_classdev *cdev, enum led_brightness br)
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{
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struct hidled_led *led = to_hidled_led(cdev);
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struct hidled_rgb *rgb = led->rgb;
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__u8 buf[MAX_REPORT_SIZE] = {};
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buf[1] = riso_kagaku_index(rgb);
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return hidled_send(rgb->ldev, buf);
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}
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static int dream_cheeky_write(struct led_classdev *cdev, enum led_brightness br)
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{
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struct hidled_led *led = to_hidled_led(cdev);
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struct hidled_rgb *rgb = led->rgb;
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__u8 buf[MAX_REPORT_SIZE] = {};
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buf[1] = rgb->red.cdev.brightness;
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buf[2] = rgb->green.cdev.brightness;
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buf[3] = rgb->blue.cdev.brightness;
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buf[7] = 0x1a;
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buf[8] = 0x05;
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return hidled_send(rgb->ldev, buf);
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}
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static int dream_cheeky_init(struct hidled_device *ldev)
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{
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__u8 buf[MAX_REPORT_SIZE] = {};
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/* Dream Cheeky magic */
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buf[1] = 0x1f;
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buf[2] = 0x02;
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buf[4] = 0x5f;
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buf[7] = 0x1a;
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buf[8] = 0x03;
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return hidled_send(ldev, buf);
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}
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static int _thingm_write(struct led_classdev *cdev, enum led_brightness br,
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u8 offset)
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{
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struct hidled_led *led = to_hidled_led(cdev);
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__u8 buf[MAX_REPORT_SIZE] = { 1, 'c' };
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buf[2] = led->rgb->red.cdev.brightness;
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buf[3] = led->rgb->green.cdev.brightness;
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buf[4] = led->rgb->blue.cdev.brightness;
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buf[7] = led->rgb->num + offset;
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return hidled_send(led->rgb->ldev, buf);
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}
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static int thingm_write_v1(struct led_classdev *cdev, enum led_brightness br)
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{
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return _thingm_write(cdev, br, 0);
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}
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static int thingm_write(struct led_classdev *cdev, enum led_brightness br)
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{
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return _thingm_write(cdev, br, 1);
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}
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static const struct hidled_config hidled_config_thingm_v1 = {
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.name = "ThingM blink(1) v1",
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.short_name = "thingm",
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.max_brightness = 255,
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.num_leds = 1,
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.report_size = 9,
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.report_type = RAW_REQUEST,
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.write = thingm_write_v1,
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};
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static int thingm_init(struct hidled_device *ldev)
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{
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__u8 buf[MAX_REPORT_SIZE] = { 1, 'v' };
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int ret;
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ret = hidled_recv(ldev, buf);
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if (ret)
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return ret;
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/* Check for firmware major version 1 */
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if (buf[3] == '1')
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ldev->config = &hidled_config_thingm_v1;
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return 0;
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}
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static inline int delcom_get_lednum(const struct hidled_led *led)
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{
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if (led == &led->rgb->red)
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return DELCOM_RED_LED;
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else if (led == &led->rgb->green)
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return DELCOM_GREEN_LED;
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else
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return DELCOM_BLUE_LED;
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}
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static int delcom_enable_led(struct hidled_led *led)
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{
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union delcom_packet dp = { .tx.major_cmd = 101, .tx.minor_cmd = 12 };
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dp.tx.data_lsb = 1 << delcom_get_lednum(led);
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dp.tx.data_msb = 0;
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return hidled_send(led->rgb->ldev, dp.data);
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}
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static int delcom_set_pwm(struct hidled_led *led)
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{
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union delcom_packet dp = { .tx.major_cmd = 101, .tx.minor_cmd = 34 };
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dp.tx.data_lsb = delcom_get_lednum(led);
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dp.tx.data_msb = led->cdev.brightness;
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return hidled_send(led->rgb->ldev, dp.data);
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}
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static int delcom_write(struct led_classdev *cdev, enum led_brightness br)
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{
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struct hidled_led *led = to_hidled_led(cdev);
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int ret;
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/*
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* enable LED
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* We can't do this in the init function already because the device
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* is internally reset later.
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*/
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ret = delcom_enable_led(led);
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if (ret)
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return ret;
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return delcom_set_pwm(led);
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}
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static int delcom_init(struct hidled_device *ldev)
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{
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union delcom_packet dp = { .rx.cmd = 104 };
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int ret;
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ret = hidled_recv(ldev, dp.data);
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if (ret)
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return ret;
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/*
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* Several Delcom devices share the same USB VID/PID
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* Check for family id 2 for Visual Signal Indicator
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*/
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return le16_to_cpu(dp.fw.family_code) == 2 ? 0 : -ENODEV;
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}
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static int luxafor_write(struct led_classdev *cdev, enum led_brightness br)
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{
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struct hidled_led *led = to_hidled_led(cdev);
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__u8 buf[MAX_REPORT_SIZE] = { [1] = 1 };
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buf[2] = led->rgb->num + 1;
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buf[3] = led->rgb->red.cdev.brightness;
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buf[4] = led->rgb->green.cdev.brightness;
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buf[5] = led->rgb->blue.cdev.brightness;
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return hidled_send(led->rgb->ldev, buf);
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}
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static const struct hidled_config hidled_configs[] = {
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{
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.type = RISO_KAGAKU,
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.name = "Riso Kagaku Webmail Notifier",
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.short_name = "riso_kagaku",
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.max_brightness = 1,
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.num_leds = 1,
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.report_size = 6,
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.report_type = OUTPUT_REPORT,
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.write = riso_kagaku_write,
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},
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{
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.type = DREAM_CHEEKY,
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.name = "Dream Cheeky Webmail Notifier",
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.short_name = "dream_cheeky",
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.max_brightness = 31,
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.num_leds = 1,
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.report_size = 9,
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.report_type = RAW_REQUEST,
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.init = dream_cheeky_init,
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.write = dream_cheeky_write,
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},
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{
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.type = THINGM,
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.name = "ThingM blink(1)",
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.short_name = "thingm",
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.max_brightness = 255,
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.num_leds = 2,
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.report_size = 9,
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.report_type = RAW_REQUEST,
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.init = thingm_init,
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.write = thingm_write,
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},
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{
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.type = DELCOM,
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.name = "Delcom Visual Signal Indicator G2",
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.short_name = "delcom",
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.max_brightness = 100,
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.num_leds = 1,
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.report_size = 8,
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.report_type = RAW_REQUEST,
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.init = delcom_init,
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.write = delcom_write,
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},
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{
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.type = LUXAFOR,
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.name = "Greynut Luxafor",
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.short_name = "luxafor",
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.max_brightness = 255,
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.num_leds = 6,
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.report_size = 9,
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.report_type = OUTPUT_REPORT,
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.write = luxafor_write,
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},
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};
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static int hidled_init_led(struct hidled_led *led, const char *color_name,
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struct hidled_rgb *rgb, unsigned int minor)
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{
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const struct hidled_config *config = rgb->ldev->config;
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if (config->num_leds > 1)
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snprintf(led->name, sizeof(led->name), "%s%u:%s:led%u",
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config->short_name, minor, color_name, rgb->num);
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else
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snprintf(led->name, sizeof(led->name), "%s%u:%s",
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config->short_name, minor, color_name);
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led->cdev.name = led->name;
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led->cdev.max_brightness = config->max_brightness;
|
|
led->cdev.brightness_set_blocking = config->write;
|
|
led->cdev.flags = LED_HW_PLUGGABLE;
|
|
led->rgb = rgb;
|
|
|
|
return devm_led_classdev_register(&rgb->ldev->hdev->dev, &led->cdev);
|
|
}
|
|
|
|
static int hidled_init_rgb(struct hidled_rgb *rgb, unsigned int minor)
|
|
{
|
|
int ret;
|
|
|
|
/* Register the red diode */
|
|
ret = hidled_init_led(&rgb->red, "red", rgb, minor);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Register the green diode */
|
|
ret = hidled_init_led(&rgb->green, "green", rgb, minor);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Register the blue diode */
|
|
return hidled_init_led(&rgb->blue, "blue", rgb, minor);
|
|
}
|
|
|
|
static int hidled_probe(struct hid_device *hdev, const struct hid_device_id *id)
|
|
{
|
|
struct hidled_device *ldev;
|
|
unsigned int minor;
|
|
int ret, i;
|
|
|
|
ldev = devm_kzalloc(&hdev->dev, sizeof(*ldev), GFP_KERNEL);
|
|
if (!ldev)
|
|
return -ENOMEM;
|
|
|
|
ldev->buf = devm_kmalloc(&hdev->dev, MAX_REPORT_SIZE, GFP_KERNEL);
|
|
if (!ldev->buf)
|
|
return -ENOMEM;
|
|
|
|
ret = hid_parse(hdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ldev->hdev = hdev;
|
|
mutex_init(&ldev->lock);
|
|
|
|
for (i = 0; !ldev->config && i < ARRAY_SIZE(hidled_configs); i++)
|
|
if (hidled_configs[i].type == id->driver_data)
|
|
ldev->config = &hidled_configs[i];
|
|
|
|
if (!ldev->config)
|
|
return -EINVAL;
|
|
|
|
if (ldev->config->init) {
|
|
ret = ldev->config->init(ldev);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ldev->rgb = devm_kcalloc(&hdev->dev, ldev->config->num_leds,
|
|
sizeof(struct hidled_rgb), GFP_KERNEL);
|
|
if (!ldev->rgb)
|
|
return -ENOMEM;
|
|
|
|
ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
|
|
if (ret)
|
|
return ret;
|
|
|
|
minor = ((struct hidraw *) hdev->hidraw)->minor;
|
|
|
|
for (i = 0; i < ldev->config->num_leds; i++) {
|
|
ldev->rgb[i].ldev = ldev;
|
|
ldev->rgb[i].num = i;
|
|
ret = hidled_init_rgb(&ldev->rgb[i], minor);
|
|
if (ret) {
|
|
hid_hw_stop(hdev);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
hid_info(hdev, "%s initialized\n", ldev->config->name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct hid_device_id hidled_table[] = {
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_RISO_KAGAKU,
|
|
USB_DEVICE_ID_RI_KA_WEBMAIL), .driver_data = RISO_KAGAKU },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY,
|
|
USB_DEVICE_ID_DREAM_CHEEKY_WN), .driver_data = DREAM_CHEEKY },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY,
|
|
USB_DEVICE_ID_DREAM_CHEEKY_FA), .driver_data = DREAM_CHEEKY },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_THINGM,
|
|
USB_DEVICE_ID_BLINK1), .driver_data = THINGM },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_DELCOM,
|
|
USB_DEVICE_ID_DELCOM_VISUAL_IND), .driver_data = DELCOM },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP,
|
|
USB_DEVICE_ID_LUXAFOR), .driver_data = LUXAFOR },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(hid, hidled_table);
|
|
|
|
static struct hid_driver hidled_driver = {
|
|
.name = "hid-led",
|
|
.probe = hidled_probe,
|
|
.id_table = hidled_table,
|
|
};
|
|
|
|
module_hid_driver(hidled_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Heiner Kallweit <hkallweit1@gmail.com>");
|
|
MODULE_DESCRIPTION("Simple USB RGB LED driver");
|