| /*************************************************************************** |
| * Copyright (C) 2010 by Bruno Prémont <bonbons@linux-vserver.org> * |
| * * |
| * Based on Logitech G13 driver (v0.4) * |
| * Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu> * |
| * * |
| * This program is free software: you can redistribute it and/or modify * |
| * it under the terms of the GNU General Public License as published by * |
| * the Free Software Foundation, version 2 of the License. * |
| * * |
| * This driver is distributed in the hope that it will be useful, but * |
| * WITHOUT ANY WARRANTY; without even the implied warranty of * |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * |
| * General Public License for more details. * |
| * * |
| * You should have received a copy of the GNU General Public License * |
| * along with this software. If not see <http://www.gnu.org/licenses/>. * |
| ***************************************************************************/ |
| |
| #include <linux/hid.h> |
| #include <linux/hid-debug.h> |
| #include <linux/input.h> |
| #include "hid-ids.h" |
| #include "usbhid/usbhid.h" |
| #include <linux/usb.h> |
| |
| #include <linux/fb.h> |
| #include <linux/vmalloc.h> |
| #include <linux/backlight.h> |
| #include <linux/lcd.h> |
| |
| #include <linux/leds.h> |
| |
| #include <linux/seq_file.h> |
| #include <linux/debugfs.h> |
| |
| #include <linux/completion.h> |
| #include <linux/uaccess.h> |
| |
| #define PICOLCD_NAME "PicoLCD (graphic)" |
| |
| /* Report numbers */ |
| #define REPORT_ERROR_CODE 0x10 /* LCD: IN[16] */ |
| #define ERR_SUCCESS 0x00 |
| #define ERR_PARAMETER_MISSING 0x01 |
| #define ERR_DATA_MISSING 0x02 |
| #define ERR_BLOCK_READ_ONLY 0x03 |
| #define ERR_BLOCK_NOT_ERASABLE 0x04 |
| #define ERR_BLOCK_TOO_BIG 0x05 |
| #define ERR_SECTION_OVERFLOW 0x06 |
| #define ERR_INVALID_CMD_LEN 0x07 |
| #define ERR_INVALID_DATA_LEN 0x08 |
| #define REPORT_KEY_STATE 0x11 /* LCD: IN[2] */ |
| #define REPORT_IR_DATA 0x21 /* LCD: IN[63] */ |
| #define REPORT_EE_DATA 0x32 /* LCD: IN[63] */ |
| #define REPORT_MEMORY 0x41 /* LCD: IN[63] */ |
| #define REPORT_LED_STATE 0x81 /* LCD: OUT[1] */ |
| #define REPORT_BRIGHTNESS 0x91 /* LCD: OUT[1] */ |
| #define REPORT_CONTRAST 0x92 /* LCD: OUT[1] */ |
| #define REPORT_RESET 0x93 /* LCD: OUT[2] */ |
| #define REPORT_LCD_CMD 0x94 /* LCD: OUT[63] */ |
| #define REPORT_LCD_DATA 0x95 /* LCD: OUT[63] */ |
| #define REPORT_LCD_CMD_DATA 0x96 /* LCD: OUT[63] */ |
| #define REPORT_EE_READ 0xa3 /* LCD: OUT[63] */ |
| #define REPORT_EE_WRITE 0xa4 /* LCD: OUT[63] */ |
| #define REPORT_ERASE_MEMORY 0xb2 /* LCD: OUT[2] */ |
| #define REPORT_READ_MEMORY 0xb3 /* LCD: OUT[3] */ |
| #define REPORT_WRITE_MEMORY 0xb4 /* LCD: OUT[63] */ |
| #define REPORT_SPLASH_RESTART 0xc1 /* LCD: OUT[1] */ |
| #define REPORT_EXIT_KEYBOARD 0xef /* LCD: OUT[2] */ |
| #define REPORT_VERSION 0xf1 /* LCD: IN[2],OUT[1] Bootloader: IN[2],OUT[1] */ |
| #define REPORT_BL_ERASE_MEMORY 0xf2 /* Bootloader: IN[36],OUT[4] */ |
| #define REPORT_BL_READ_MEMORY 0xf3 /* Bootloader: IN[36],OUT[4] */ |
| #define REPORT_BL_WRITE_MEMORY 0xf4 /* Bootloader: IN[36],OUT[36] */ |
| #define REPORT_DEVID 0xf5 /* LCD: IN[5], OUT[1] Bootloader: IN[5],OUT[1] */ |
| #define REPORT_SPLASH_SIZE 0xf6 /* LCD: IN[4], OUT[1] */ |
| #define REPORT_HOOK_VERSION 0xf7 /* LCD: IN[2], OUT[1] */ |
| #define REPORT_EXIT_FLASHER 0xff /* Bootloader: OUT[2] */ |
| |
| #ifdef CONFIG_HID_PICOLCD_FB |
| /* Framebuffer |
| * |
| * The PicoLCD use a Topway LCD module of 256x64 pixel |
| * This display area is tiled over 4 controllers with 8 tiles |
| * each. Each tile has 8x64 pixel, each data byte representing |
| * a 1-bit wide vertical line of the tile. |
| * |
| * The display can be updated at a tile granularity. |
| * |
| * Chip 1 Chip 2 Chip 3 Chip 4 |
| * +----------------+----------------+----------------+----------------+ |
| * | Tile 1 | Tile 1 | Tile 1 | Tile 1 | |
| * +----------------+----------------+----------------+----------------+ |
| * | Tile 2 | Tile 2 | Tile 2 | Tile 2 | |
| * +----------------+----------------+----------------+----------------+ |
| * ... |
| * +----------------+----------------+----------------+----------------+ |
| * | Tile 8 | Tile 8 | Tile 8 | Tile 8 | |
| * +----------------+----------------+----------------+----------------+ |
| */ |
| #define PICOLCDFB_NAME "picolcdfb" |
| #define PICOLCDFB_WIDTH (256) |
| #define PICOLCDFB_HEIGHT (64) |
| #define PICOLCDFB_SIZE (PICOLCDFB_WIDTH * PICOLCDFB_HEIGHT / 8) |
| |
| #define PICOLCDFB_UPDATE_RATE_LIMIT 10 |
| #define PICOLCDFB_UPDATE_RATE_DEFAULT 2 |
| |
| /* Framebuffer visual structures */ |
| static const struct fb_fix_screeninfo picolcdfb_fix = { |
| .id = PICOLCDFB_NAME, |
| .type = FB_TYPE_PACKED_PIXELS, |
| .visual = FB_VISUAL_MONO01, |
| .xpanstep = 0, |
| .ypanstep = 0, |
| .ywrapstep = 0, |
| .line_length = PICOLCDFB_WIDTH / 8, |
| .accel = FB_ACCEL_NONE, |
| }; |
| |
| static const struct fb_var_screeninfo picolcdfb_var = { |
| .xres = PICOLCDFB_WIDTH, |
| .yres = PICOLCDFB_HEIGHT, |
| .xres_virtual = PICOLCDFB_WIDTH, |
| .yres_virtual = PICOLCDFB_HEIGHT, |
| .width = 103, |
| .height = 26, |
| .bits_per_pixel = 1, |
| .grayscale = 1, |
| .red = { |
| .offset = 0, |
| .length = 1, |
| .msb_right = 0, |
| }, |
| .green = { |
| .offset = 0, |
| .length = 1, |
| .msb_right = 0, |
| }, |
| .blue = { |
| .offset = 0, |
| .length = 1, |
| .msb_right = 0, |
| }, |
| .transp = { |
| .offset = 0, |
| .length = 0, |
| .msb_right = 0, |
| }, |
| }; |
| #endif /* CONFIG_HID_PICOLCD_FB */ |
| |
| /* Input device |
| * |
| * The PicoLCD has an IR receiver header, a built-in keypad with 5 keys |
| * and header for 4x4 key matrix. The built-in keys are part of the matrix. |
| */ |
| static const unsigned short def_keymap[] = { |
| KEY_RESERVED, /* none */ |
| KEY_BACK, /* col 4 + row 1 */ |
| KEY_HOMEPAGE, /* col 3 + row 1 */ |
| KEY_RESERVED, /* col 2 + row 1 */ |
| KEY_RESERVED, /* col 1 + row 1 */ |
| KEY_SCROLLUP, /* col 4 + row 2 */ |
| KEY_OK, /* col 3 + row 2 */ |
| KEY_SCROLLDOWN, /* col 2 + row 2 */ |
| KEY_RESERVED, /* col 1 + row 2 */ |
| KEY_RESERVED, /* col 4 + row 3 */ |
| KEY_RESERVED, /* col 3 + row 3 */ |
| KEY_RESERVED, /* col 2 + row 3 */ |
| KEY_RESERVED, /* col 1 + row 3 */ |
| KEY_RESERVED, /* col 4 + row 4 */ |
| KEY_RESERVED, /* col 3 + row 4 */ |
| KEY_RESERVED, /* col 2 + row 4 */ |
| KEY_RESERVED, /* col 1 + row 4 */ |
| }; |
| #define PICOLCD_KEYS ARRAY_SIZE(def_keymap) |
| |
| /* Description of in-progress IO operation, used for operations |
| * that trigger response from device */ |
| struct picolcd_pending { |
| struct hid_report *out_report; |
| struct hid_report *in_report; |
| struct completion ready; |
| int raw_size; |
| u8 raw_data[64]; |
| }; |
| |
| /* Per device data structure */ |
| struct picolcd_data { |
| struct hid_device *hdev; |
| #ifdef CONFIG_DEBUG_FS |
| struct dentry *debug_reset; |
| struct dentry *debug_eeprom; |
| struct dentry *debug_flash; |
| struct mutex mutex_flash; |
| int addr_sz; |
| #endif |
| u8 version[2]; |
| unsigned short opmode_delay; |
| /* input stuff */ |
| u8 pressed_keys[2]; |
| struct input_dev *input_keys; |
| struct input_dev *input_cir; |
| unsigned short keycode[PICOLCD_KEYS]; |
| |
| #ifdef CONFIG_HID_PICOLCD_FB |
| /* Framebuffer stuff */ |
| u8 fb_update_rate; |
| u8 fb_bpp; |
| u8 fb_force; |
| u8 *fb_vbitmap; /* local copy of what was sent to PicoLCD */ |
| u8 *fb_bitmap; /* framebuffer */ |
| struct fb_info *fb_info; |
| struct fb_deferred_io fb_defio; |
| #endif /* CONFIG_HID_PICOLCD_FB */ |
| #ifdef CONFIG_HID_PICOLCD_LCD |
| struct lcd_device *lcd; |
| u8 lcd_contrast; |
| #endif /* CONFIG_HID_PICOLCD_LCD */ |
| #ifdef CONFIG_HID_PICOLCD_BACKLIGHT |
| struct backlight_device *backlight; |
| u8 lcd_brightness; |
| u8 lcd_power; |
| #endif /* CONFIG_HID_PICOLCD_BACKLIGHT */ |
| #ifdef CONFIG_HID_PICOLCD_LEDS |
| /* LED stuff */ |
| u8 led_state; |
| struct led_classdev *led[8]; |
| #endif /* CONFIG_HID_PICOLCD_LEDS */ |
| |
| /* Housekeeping stuff */ |
| spinlock_t lock; |
| struct mutex mutex; |
| struct picolcd_pending *pending; |
| int status; |
| #define PICOLCD_BOOTLOADER 1 |
| #define PICOLCD_FAILED 2 |
| #define PICOLCD_READY_FB 4 |
| }; |
| |
| |
| /* Find a given report */ |
| #define picolcd_in_report(id, dev) picolcd_report(id, dev, HID_INPUT_REPORT) |
| #define picolcd_out_report(id, dev) picolcd_report(id, dev, HID_OUTPUT_REPORT) |
| |
| static struct hid_report *picolcd_report(int id, struct hid_device *hdev, int dir) |
| { |
| struct list_head *feature_report_list = &hdev->report_enum[dir].report_list; |
| struct hid_report *report = NULL; |
| |
| list_for_each_entry(report, feature_report_list, list) { |
| if (report->id == id) |
| return report; |
| } |
| dev_warn(&hdev->dev, "No report with id 0x%x found\n", id); |
| return NULL; |
| } |
| |
| #ifdef CONFIG_DEBUG_FS |
| static void picolcd_debug_out_report(struct picolcd_data *data, |
| struct hid_device *hdev, struct hid_report *report); |
| #define usbhid_submit_report(a, b, c) \ |
| do { \ |
| picolcd_debug_out_report(hid_get_drvdata(a), a, b); \ |
| usbhid_submit_report(a, b, c); \ |
| } while (0) |
| #endif |
| |
| /* Submit a report and wait for a reply from device - if device fades away |
| * or does not respond in time, return NULL */ |
| static struct picolcd_pending *picolcd_send_and_wait(struct hid_device *hdev, |
| int report_id, const u8 *raw_data, int size) |
| { |
| struct picolcd_data *data = hid_get_drvdata(hdev); |
| struct picolcd_pending *work; |
| struct hid_report *report = picolcd_out_report(report_id, hdev); |
| unsigned long flags; |
| int i, j, k; |
| |
| if (!report || !data) |
| return NULL; |
| if (data->status & PICOLCD_FAILED) |
| return NULL; |
| work = kzalloc(sizeof(*work), GFP_KERNEL); |
| if (!work) |
| return NULL; |
| |
| init_completion(&work->ready); |
| work->out_report = report; |
| work->in_report = NULL; |
| work->raw_size = 0; |
| |
| mutex_lock(&data->mutex); |
| spin_lock_irqsave(&data->lock, flags); |
| for (i = k = 0; i < report->maxfield; i++) |
| for (j = 0; j < report->field[i]->report_count; j++) { |
| hid_set_field(report->field[i], j, k < size ? raw_data[k] : 0); |
| k++; |
| } |
| data->pending = work; |
| usbhid_submit_report(data->hdev, report, USB_DIR_OUT); |
| spin_unlock_irqrestore(&data->lock, flags); |
| wait_for_completion_interruptible_timeout(&work->ready, HZ*2); |
| spin_lock_irqsave(&data->lock, flags); |
| data->pending = NULL; |
| spin_unlock_irqrestore(&data->lock, flags); |
| mutex_unlock(&data->mutex); |
| return work; |
| } |
| |
| #ifdef CONFIG_HID_PICOLCD_FB |
| /* Send a given tile to PicoLCD */ |
| static int picolcd_fb_send_tile(struct hid_device *hdev, int chip, int tile) |
| { |
| struct picolcd_data *data = hid_get_drvdata(hdev); |
| struct hid_report *report1 = picolcd_out_report(REPORT_LCD_CMD_DATA, hdev); |
| struct hid_report *report2 = picolcd_out_report(REPORT_LCD_DATA, hdev); |
| unsigned long flags; |
| u8 *tdata; |
| int i; |
| |
| if (!report1 || report1->maxfield != 1 || !report2 || report2->maxfield != 1) |
| return -ENODEV; |
| |
| spin_lock_irqsave(&data->lock, flags); |
| hid_set_field(report1->field[0], 0, chip << 2); |
| hid_set_field(report1->field[0], 1, 0x02); |
| hid_set_field(report1->field[0], 2, 0x00); |
| hid_set_field(report1->field[0], 3, 0x00); |
| hid_set_field(report1->field[0], 4, 0xb8 | tile); |
| hid_set_field(report1->field[0], 5, 0x00); |
| hid_set_field(report1->field[0], 6, 0x00); |
| hid_set_field(report1->field[0], 7, 0x40); |
| hid_set_field(report1->field[0], 8, 0x00); |
| hid_set_field(report1->field[0], 9, 0x00); |
| hid_set_field(report1->field[0], 10, 32); |
| |
| hid_set_field(report2->field[0], 0, (chip << 2) | 0x01); |
| hid_set_field(report2->field[0], 1, 0x00); |
| hid_set_field(report2->field[0], 2, 0x00); |
| hid_set_field(report2->field[0], 3, 32); |
| |
| tdata = data->fb_vbitmap + (tile * 4 + chip) * 64; |
| for (i = 0; i < 64; i++) |
| if (i < 32) |
| hid_set_field(report1->field[0], 11 + i, tdata[i]); |
| else |
| hid_set_field(report2->field[0], 4 + i - 32, tdata[i]); |
| |
| usbhid_submit_report(data->hdev, report1, USB_DIR_OUT); |
| usbhid_submit_report(data->hdev, report2, USB_DIR_OUT); |
| spin_unlock_irqrestore(&data->lock, flags); |
| return 0; |
| } |
| |
| /* Translate a single tile*/ |
| static int picolcd_fb_update_tile(u8 *vbitmap, const u8 *bitmap, int bpp, |
| int chip, int tile) |
| { |
| int i, b, changed = 0; |
| u8 tdata[64]; |
| u8 *vdata = vbitmap + (tile * 4 + chip) * 64; |
| |
| if (bpp == 1) { |
| for (b = 7; b >= 0; b--) { |
| const u8 *bdata = bitmap + tile * 256 + chip * 8 + b * 32; |
| for (i = 0; i < 64; i++) { |
| tdata[i] <<= 1; |
| tdata[i] |= (bdata[i/8] >> (i % 8)) & 0x01; |
| } |
| } |
| } else if (bpp == 8) { |
| for (b = 7; b >= 0; b--) { |
| const u8 *bdata = bitmap + (tile * 256 + chip * 8 + b * 32) * 8; |
| for (i = 0; i < 64; i++) { |
| tdata[i] <<= 1; |
| tdata[i] |= (bdata[i] & 0x80) ? 0x01 : 0x00; |
| } |
| } |
| } else { |
| /* Oops, we should never get here! */ |
| WARN_ON(1); |
| return 0; |
| } |
| |
| for (i = 0; i < 64; i++) |
| if (tdata[i] != vdata[i]) { |
| changed = 1; |
| vdata[i] = tdata[i]; |
| } |
| return changed; |
| } |
| |
| /* Reconfigure LCD display */ |
| static int picolcd_fb_reset(struct picolcd_data *data, int clear) |
| { |
| struct hid_report *report = picolcd_out_report(REPORT_LCD_CMD, data->hdev); |
| int i, j; |
| unsigned long flags; |
| static const u8 mapcmd[8] = { 0x00, 0x02, 0x00, 0x64, 0x3f, 0x00, 0x64, 0xc0 }; |
| |
| if (!report || report->maxfield != 1) |
| return -ENODEV; |
| |
| spin_lock_irqsave(&data->lock, flags); |
| for (i = 0; i < 4; i++) { |
| for (j = 0; j < report->field[0]->maxusage; j++) |
| if (j == 0) |
| hid_set_field(report->field[0], j, i << 2); |
| else if (j < sizeof(mapcmd)) |
| hid_set_field(report->field[0], j, mapcmd[j]); |
| else |
| hid_set_field(report->field[0], j, 0); |
| usbhid_submit_report(data->hdev, report, USB_DIR_OUT); |
| } |
| |
| data->status |= PICOLCD_READY_FB; |
| spin_unlock_irqrestore(&data->lock, flags); |
| |
| if (data->fb_bitmap) { |
| if (clear) { |
| memset(data->fb_vbitmap, 0, PICOLCDFB_SIZE); |
| memset(data->fb_bitmap, 0, PICOLCDFB_SIZE*data->fb_bpp); |
| } |
| data->fb_force = 1; |
| } |
| |
| /* schedule first output of framebuffer */ |
| if (data->fb_info) |
| schedule_delayed_work(&data->fb_info->deferred_work, 0); |
| |
| return 0; |
| } |
| |
| /* Update fb_vbitmap from the screen_base and send changed tiles to device */ |
| static void picolcd_fb_update(struct picolcd_data *data) |
| { |
| int chip, tile, n; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&data->lock, flags); |
| if (!(data->status & PICOLCD_READY_FB)) { |
| spin_unlock_irqrestore(&data->lock, flags); |
| picolcd_fb_reset(data, 0); |
| } else { |
| spin_unlock_irqrestore(&data->lock, flags); |
| } |
| |
| /* |
| * Translate the framebuffer into the format needed by the PicoLCD. |
| * See display layout above. |
| * Do this one tile after the other and push those tiles that changed. |
| * |
| * Wait for our IO to complete as otherwise we might flood the queue! |
| */ |
| n = 0; |
| for (chip = 0; chip < 4; chip++) |
| for (tile = 0; tile < 8; tile++) |
| if (picolcd_fb_update_tile(data->fb_vbitmap, |
| data->fb_bitmap, data->fb_bpp, chip, tile) || |
| data->fb_force) { |
| n += 2; |
| if (n >= HID_OUTPUT_FIFO_SIZE / 2) { |
| usbhid_wait_io(data->hdev); |
| n = 0; |
| } |
| picolcd_fb_send_tile(data->hdev, chip, tile); |
| } |
| data->fb_force = false; |
| if (n) |
| usbhid_wait_io(data->hdev); |
| } |
| |
| /* Stub to call the system default and update the image on the picoLCD */ |
| static void picolcd_fb_fillrect(struct fb_info *info, |
| const struct fb_fillrect *rect) |
| { |
| if (!info->par) |
| return; |
| sys_fillrect(info, rect); |
| |
| schedule_delayed_work(&info->deferred_work, 0); |
| } |
| |
| /* Stub to call the system default and update the image on the picoLCD */ |
| static void picolcd_fb_copyarea(struct fb_info *info, |
| const struct fb_copyarea *area) |
| { |
| if (!info->par) |
| return; |
| sys_copyarea(info, area); |
| |
| schedule_delayed_work(&info->deferred_work, 0); |
| } |
| |
| /* Stub to call the system default and update the image on the picoLCD */ |
| static void picolcd_fb_imageblit(struct fb_info *info, const struct fb_image *image) |
| { |
| if (!info->par) |
| return; |
| sys_imageblit(info, image); |
| |
| schedule_delayed_work(&info->deferred_work, 0); |
| } |
| |
| /* |
| * this is the slow path from userspace. they can seek and write to |
| * the fb. it's inefficient to do anything less than a full screen draw |
| */ |
| static ssize_t picolcd_fb_write(struct fb_info *info, const char __user *buf, |
| size_t count, loff_t *ppos) |
| { |
| ssize_t ret; |
| if (!info->par) |
| return -ENODEV; |
| ret = fb_sys_write(info, buf, count, ppos); |
| if (ret >= 0) |
| schedule_delayed_work(&info->deferred_work, 0); |
| return ret; |
| } |
| |
| static int picolcd_fb_blank(int blank, struct fb_info *info) |
| { |
| if (!info->par) |
| return -ENODEV; |
| /* We let fb notification do this for us via lcd/backlight device */ |
| return 0; |
| } |
| |
| static void picolcd_fb_destroy(struct fb_info *info) |
| { |
| struct picolcd_data *data = info->par; |
| info->par = NULL; |
| if (data) |
| data->fb_info = NULL; |
| fb_deferred_io_cleanup(info); |
| framebuffer_release(info); |
| } |
| |
| static int picolcd_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) |
| { |
| __u32 bpp = var->bits_per_pixel; |
| __u32 activate = var->activate; |
| |
| /* only allow 1/8 bit depth (8-bit is grayscale) */ |
| *var = picolcdfb_var; |
| var->activate = activate; |
| if (bpp >= 8) { |
| var->bits_per_pixel = 8; |
| var->red.length = 8; |
| var->green.length = 8; |
| var->blue.length = 8; |
| } else { |
| var->bits_per_pixel = 1; |
| var->red.length = 1; |
| var->green.length = 1; |
| var->blue.length = 1; |
| } |
| return 0; |
| } |
| |
| static int picolcd_set_par(struct fb_info *info) |
| { |
| struct picolcd_data *data = info->par; |
| u8 *o_fb, *n_fb; |
| if (info->var.bits_per_pixel == data->fb_bpp) |
| return 0; |
| /* switch between 1/8 bit depths */ |
| if (info->var.bits_per_pixel != 1 && info->var.bits_per_pixel != 8) |
| return -EINVAL; |
| |
| o_fb = data->fb_bitmap; |
| n_fb = vmalloc(PICOLCDFB_SIZE*info->var.bits_per_pixel); |
| if (!n_fb) |
| return -ENOMEM; |
| |
| fb_deferred_io_cleanup(info); |
| /* translate FB content to new bits-per-pixel */ |
| if (info->var.bits_per_pixel == 1) { |
| int i, b; |
| for (i = 0; i < PICOLCDFB_SIZE; i++) { |
| u8 p = 0; |
| for (b = 0; b < 8; b++) { |
| p <<= 1; |
| p |= o_fb[i*8+b] ? 0x01 : 0x00; |
| } |
| } |
| info->fix.visual = FB_VISUAL_MONO01; |
| info->fix.line_length = PICOLCDFB_WIDTH / 8; |
| } else { |
| int i; |
| for (i = 0; i < PICOLCDFB_SIZE * 8; i++) |
| n_fb[i] = o_fb[i/8] & (0x01 << (7 - i % 8)) ? 0xff : 0x00; |
| info->fix.visual = FB_VISUAL_TRUECOLOR; |
| info->fix.line_length = PICOLCDFB_WIDTH; |
| } |
| |
| data->fb_bitmap = n_fb; |
| data->fb_bpp = info->var.bits_per_pixel; |
| info->screen_base = (char __force __iomem *)n_fb; |
| info->fix.smem_start = (unsigned long)n_fb; |
| info->fix.smem_len = PICOLCDFB_SIZE*data->fb_bpp; |
| fb_deferred_io_init(info); |
| vfree(o_fb); |
| return 0; |
| } |
| |
| /* Note this can't be const because of struct fb_info definition */ |
| static struct fb_ops picolcdfb_ops = { |
| .owner = THIS_MODULE, |
| .fb_destroy = picolcd_fb_destroy, |
| .fb_read = fb_sys_read, |
| .fb_write = picolcd_fb_write, |
| .fb_blank = picolcd_fb_blank, |
| .fb_fillrect = picolcd_fb_fillrect, |
| .fb_copyarea = picolcd_fb_copyarea, |
| .fb_imageblit = picolcd_fb_imageblit, |
| .fb_check_var = picolcd_fb_check_var, |
| .fb_set_par = picolcd_set_par, |
| }; |
| |
| |
| /* Callback from deferred IO workqueue */ |
| static void picolcd_fb_deferred_io(struct fb_info *info, struct list_head *pagelist) |
| { |
| picolcd_fb_update(info->par); |
| } |
| |
| static const struct fb_deferred_io picolcd_fb_defio = { |
| .delay = HZ / PICOLCDFB_UPDATE_RATE_DEFAULT, |
| .deferred_io = picolcd_fb_deferred_io, |
| }; |
| |
| |
| /* |
| * The "fb_update_rate" sysfs attribute |
| */ |
| static ssize_t picolcd_fb_update_rate_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct picolcd_data *data = dev_get_drvdata(dev); |
| unsigned i, fb_update_rate = data->fb_update_rate; |
| size_t ret = 0; |
| |
| for (i = 1; i <= PICOLCDFB_UPDATE_RATE_LIMIT; i++) |
| if (ret >= PAGE_SIZE) |
| break; |
| else if (i == fb_update_rate) |
| ret += snprintf(buf+ret, PAGE_SIZE-ret, "[%u] ", i); |
| else |
| ret += snprintf(buf+ret, PAGE_SIZE-ret, "%u ", i); |
| if (ret > 0) |
| buf[min(ret, (size_t)PAGE_SIZE)-1] = '\n'; |
| return ret; |
| } |
| |
| static ssize_t picolcd_fb_update_rate_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct picolcd_data *data = dev_get_drvdata(dev); |
| int i; |
| unsigned u; |
| |
| if (count < 1 || count > 10) |
| return -EINVAL; |
| |
| i = sscanf(buf, "%u", &u); |
| if (i != 1) |
| return -EINVAL; |
| |
| if (u > PICOLCDFB_UPDATE_RATE_LIMIT) |
| return -ERANGE; |
| else if (u == 0) |
| u = PICOLCDFB_UPDATE_RATE_DEFAULT; |
| |
| data->fb_update_rate = u; |
| data->fb_defio.delay = HZ / data->fb_update_rate; |
| return count; |
| } |
| |
| static DEVICE_ATTR(fb_update_rate, 0666, picolcd_fb_update_rate_show, |
| picolcd_fb_update_rate_store); |
| |
| /* initialize Framebuffer device */ |
| static int picolcd_init_framebuffer(struct picolcd_data *data) |
| { |
| struct device *dev = &data->hdev->dev; |
| struct fb_info *info = NULL; |
| int i, error = -ENOMEM; |
| u8 *fb_vbitmap = NULL; |
| u8 *fb_bitmap = NULL; |
| u32 *palette; |
| |
| fb_bitmap = vmalloc(PICOLCDFB_SIZE*picolcdfb_var.bits_per_pixel); |
| if (fb_bitmap == NULL) { |
| dev_err(dev, "can't get a free page for framebuffer\n"); |
| goto err_nomem; |
| } |
| |
| fb_vbitmap = kmalloc(PICOLCDFB_SIZE, GFP_KERNEL); |
| if (fb_vbitmap == NULL) { |
| dev_err(dev, "can't alloc vbitmap image buffer\n"); |
| goto err_nomem; |
| } |
| |
| data->fb_update_rate = PICOLCDFB_UPDATE_RATE_DEFAULT; |
| data->fb_defio = picolcd_fb_defio; |
| /* The extra memory is: |
| * - struct picolcd_fb_cleanup_item |
| * - u32 for ref_count |
| * - 256*u32 for pseudo_palette |
| */ |
| info = framebuffer_alloc(257 * sizeof(u32), dev); |
| if (info == NULL) { |
| dev_err(dev, "failed to allocate a framebuffer\n"); |
| goto err_nomem; |
| } |
| |
| palette = info->par; |
| *palette = 1; |
| palette++; |
| for (i = 0; i < 256; i++) |
| palette[i] = i > 0 && i < 16 ? 0xff : 0; |
| info->pseudo_palette = palette; |
| info->fbdefio = &data->fb_defio; |
| info->screen_base = (char __force __iomem *)fb_bitmap; |
| info->fbops = &picolcdfb_ops; |
| info->var = picolcdfb_var; |
| info->fix = picolcdfb_fix; |
| info->fix.smem_len = PICOLCDFB_SIZE; |
| info->fix.smem_start = (unsigned long)fb_bitmap; |
| info->par = data; |
| info->flags = FBINFO_FLAG_DEFAULT; |
| |
| data->fb_vbitmap = fb_vbitmap; |
| data->fb_bitmap = fb_bitmap; |
| data->fb_bpp = picolcdfb_var.bits_per_pixel; |
| error = picolcd_fb_reset(data, 1); |
| if (error) { |
| dev_err(dev, "failed to configure display\n"); |
| goto err_cleanup; |
| } |
| error = device_create_file(dev, &dev_attr_fb_update_rate); |
| if (error) { |
| dev_err(dev, "failed to create sysfs attributes\n"); |
| goto err_cleanup; |
| } |
| fb_deferred_io_init(info); |
| data->fb_info = info; |
| error = register_framebuffer(info); |
| if (error) { |
| dev_err(dev, "failed to register framebuffer\n"); |
| goto err_sysfs; |
| } |
| /* schedule first output of framebuffer */ |
| data->fb_force = 1; |
| schedule_delayed_work(&info->deferred_work, 0); |
| return 0; |
| |
| err_sysfs: |
| fb_deferred_io_cleanup(info); |
| device_remove_file(dev, &dev_attr_fb_update_rate); |
| err_cleanup: |
| data->fb_vbitmap = NULL; |
| data->fb_bitmap = NULL; |
| data->fb_bpp = 0; |
| data->fb_info = NULL; |
| |
| err_nomem: |
| framebuffer_release(info); |
| vfree(fb_bitmap); |
| kfree(fb_vbitmap); |
| return error; |
| } |
| |
| static void picolcd_exit_framebuffer(struct picolcd_data *data) |
| { |
| struct fb_info *info = data->fb_info; |
| u8 *fb_vbitmap = data->fb_vbitmap; |
| u8 *fb_bitmap = data->fb_bitmap; |
| |
| if (!info) |
| return; |
| |
| data->fb_vbitmap = NULL; |
| data->fb_bitmap = NULL; |
| data->fb_bpp = 0; |
| data->fb_info = NULL; |
| device_remove_file(&data->hdev->dev, &dev_attr_fb_update_rate); |
| unregister_framebuffer(info); |
| vfree(fb_bitmap); |
| kfree(fb_vbitmap); |
| } |
| |
| #define picolcd_fbinfo(d) ((d)->fb_info) |
| #else |
| static inline int picolcd_fb_reset(struct picolcd_data *data, int clear) |
| { |
| return 0; |
| } |
| static inline int picolcd_init_framebuffer(struct picolcd_data *data) |
| { |
| return 0; |
| } |
| static inline void picolcd_exit_framebuffer(struct picolcd_data *data) |
| { |
| } |
| #define picolcd_fbinfo(d) NULL |
| #endif /* CONFIG_HID_PICOLCD_FB */ |
| |
| #ifdef CONFIG_HID_PICOLCD_BACKLIGHT |
| /* |
| * backlight class device |
| */ |
| static int picolcd_get_brightness(struct backlight_device *bdev) |
| { |
| struct picolcd_data *data = bl_get_data(bdev); |
| return data->lcd_brightness; |
| } |
| |
| static int picolcd_set_brightness(struct backlight_device *bdev) |
| { |
| struct picolcd_data *data = bl_get_data(bdev); |
| struct hid_report *report = picolcd_out_report(REPORT_BRIGHTNESS, data->hdev); |
| unsigned long flags; |
| |
| if (!report || report->maxfield != 1 || report->field[0]->report_count != 1) |
| return -ENODEV; |
| |
| data->lcd_brightness = bdev->props.brightness & 0x0ff; |
| data->lcd_power = bdev->props.power; |
| spin_lock_irqsave(&data->lock, flags); |
| hid_set_field(report->field[0], 0, data->lcd_power == FB_BLANK_UNBLANK ? data->lcd_brightness : 0); |
| usbhid_submit_report(data->hdev, report, USB_DIR_OUT); |
| spin_unlock_irqrestore(&data->lock, flags); |
| return 0; |
| } |
| |
| static int picolcd_check_bl_fb(struct backlight_device *bdev, struct fb_info *fb) |
| { |
| return fb && fb == picolcd_fbinfo((struct picolcd_data *)bl_get_data(bdev)); |
| } |
| |
| static const struct backlight_ops picolcd_blops = { |
| .update_status = picolcd_set_brightness, |
| .get_brightness = picolcd_get_brightness, |
| .check_fb = picolcd_check_bl_fb, |
| }; |
| |
| static int picolcd_init_backlight(struct picolcd_data *data, struct hid_report *report) |
| { |
| struct device *dev = &data->hdev->dev; |
| struct backlight_device *bdev; |
| struct backlight_properties props; |
| if (!report) |
| return -ENODEV; |
| if (report->maxfield != 1 || report->field[0]->report_count != 1 || |
| report->field[0]->report_size != 8) { |
| dev_err(dev, "unsupported BRIGHTNESS report"); |
| return -EINVAL; |
| } |
| |
| memset(&props, 0, sizeof(props)); |
| props.max_brightness = 0xff; |
| bdev = backlight_device_register(dev_name(dev), dev, data, |
| &picolcd_blops, &props); |
| if (IS_ERR(bdev)) { |
| dev_err(dev, "failed to register backlight\n"); |
| return PTR_ERR(bdev); |
| } |
| bdev->props.brightness = 0xff; |
| data->lcd_brightness = 0xff; |
| data->backlight = bdev; |
| picolcd_set_brightness(bdev); |
| return 0; |
| } |
| |
| static void picolcd_exit_backlight(struct picolcd_data *data) |
| { |
| struct backlight_device *bdev = data->backlight; |
| |
| data->backlight = NULL; |
| if (bdev) |
| backlight_device_unregister(bdev); |
| } |
| |
| static inline int picolcd_resume_backlight(struct picolcd_data *data) |
| { |
| if (!data->backlight) |
| return 0; |
| return picolcd_set_brightness(data->backlight); |
| } |
| |
| #ifdef CONFIG_PM |
| static void picolcd_suspend_backlight(struct picolcd_data *data) |
| { |
| int bl_power = data->lcd_power; |
| if (!data->backlight) |
| return; |
| |
| data->backlight->props.power = FB_BLANK_POWERDOWN; |
| picolcd_set_brightness(data->backlight); |
| data->lcd_power = data->backlight->props.power = bl_power; |
| } |
| #endif /* CONFIG_PM */ |
| #else |
| static inline int picolcd_init_backlight(struct picolcd_data *data, |
| struct hid_report *report) |
| { |
| return 0; |
| } |
| static inline void picolcd_exit_backlight(struct picolcd_data *data) |
| { |
| } |
| static inline int picolcd_resume_backlight(struct picolcd_data *data) |
| { |
| return 0; |
| } |
| static inline void picolcd_suspend_backlight(struct picolcd_data *data) |
| { |
| } |
| #endif /* CONFIG_HID_PICOLCD_BACKLIGHT */ |
| |
| #ifdef CONFIG_HID_PICOLCD_LCD |
| /* |
| * lcd class device |
| */ |
| static int picolcd_get_contrast(struct lcd_device *ldev) |
| { |
| struct picolcd_data *data = lcd_get_data(ldev); |
| return data->lcd_contrast; |
| } |
| |
| static int picolcd_set_contrast(struct lcd_device *ldev, int contrast) |
| { |
| struct picolcd_data *data = lcd_get_data(ldev); |
| struct hid_report *report = picolcd_out_report(REPORT_CONTRAST, data->hdev); |
| unsigned long flags; |
| |
| if (!report || report->maxfield != 1 || report->field[0]->report_count != 1) |
| return -ENODEV; |
| |
| data->lcd_contrast = contrast & 0x0ff; |
| spin_lock_irqsave(&data->lock, flags); |
| hid_set_field(report->field[0], 0, data->lcd_contrast); |
| usbhid_submit_report(data->hdev, report, USB_DIR_OUT); |
| spin_unlock_irqrestore(&data->lock, flags); |
| return 0; |
| } |
| |
| static int picolcd_check_lcd_fb(struct lcd_device *ldev, struct fb_info *fb) |
| { |
| return fb && fb == picolcd_fbinfo((struct picolcd_data *)lcd_get_data(ldev)); |
| } |
| |
| static struct lcd_ops picolcd_lcdops = { |
| .get_contrast = picolcd_get_contrast, |
| .set_contrast = picolcd_set_contrast, |
| .check_fb = picolcd_check_lcd_fb, |
| }; |
| |
| static int picolcd_init_lcd(struct picolcd_data *data, struct hid_report *report) |
| { |
| struct device *dev = &data->hdev->dev; |
| struct lcd_device *ldev; |
| |
| if (!report) |
| return -ENODEV; |
| if (report->maxfield != 1 || report->field[0]->report_count != 1 || |
| report->field[0]->report_size != 8) { |
| dev_err(dev, "unsupported CONTRAST report"); |
| return -EINVAL; |
| } |
| |
| ldev = lcd_device_register(dev_name(dev), dev, data, &picolcd_lcdops); |
| if (IS_ERR(ldev)) { |
| dev_err(dev, "failed to register LCD\n"); |
| return PTR_ERR(ldev); |
| } |
| ldev->props.max_contrast = 0x0ff; |
| data->lcd_contrast = 0xe5; |
| data->lcd = ldev; |
| picolcd_set_contrast(ldev, 0xe5); |
| return 0; |
| } |
| |
| static void picolcd_exit_lcd(struct picolcd_data *data) |
| { |
| struct lcd_device *ldev = data->lcd; |
| |
| data->lcd = NULL; |
| if (ldev) |
| lcd_device_unregister(ldev); |
| } |
| |
| static inline int picolcd_resume_lcd(struct picolcd_data *data) |
| { |
| if (!data->lcd) |
| return 0; |
| return picolcd_set_contrast(data->lcd, data->lcd_contrast); |
| } |
| #else |
| static inline int picolcd_init_lcd(struct picolcd_data *data, |
| struct hid_report *report) |
| { |
| return 0; |
| } |
| static inline void picolcd_exit_lcd(struct picolcd_data *data) |
| { |
| } |
| static inline int picolcd_resume_lcd(struct picolcd_data *data) |
| { |
| return 0; |
| } |
| #endif /* CONFIG_HID_PICOLCD_LCD */ |
| |
| #ifdef CONFIG_HID_PICOLCD_LEDS |
| /** |
| * LED class device |
| */ |
| static void picolcd_leds_set(struct picolcd_data *data) |
| { |
| struct hid_report *report; |
| unsigned long flags; |
| |
| if (!data->led[0]) |
| return; |
| report = picolcd_out_report(REPORT_LED_STATE, data->hdev); |
| if (!report || report->maxfield != 1 || report->field[0]->report_count != 1) |
| return; |
| |
| spin_lock_irqsave(&data->lock, flags); |
| hid_set_field(report->field[0], 0, data->led_state); |
| usbhid_submit_report(data->hdev, report, USB_DIR_OUT); |
| spin_unlock_irqrestore(&data->lock, flags); |
| } |
| |
| static void picolcd_led_set_brightness(struct led_classdev *led_cdev, |
| enum led_brightness value) |
| { |
| struct device *dev; |
| struct hid_device *hdev; |
| struct picolcd_data *data; |
| int i, state = 0; |
| |
| dev = led_cdev->dev->parent; |
| hdev = container_of(dev, struct hid_device, dev); |
| data = hid_get_drvdata(hdev); |
| for (i = 0; i < 8; i++) { |
| if (led_cdev != data->led[i]) |
| continue; |
| state = (data->led_state >> i) & 1; |
| if (value == LED_OFF && state) { |
| data->led_state &= ~(1 << i); |
| picolcd_leds_set(data); |
| } else if (value != LED_OFF && !state) { |
| data->led_state |= 1 << i; |
| picolcd_leds_set(data); |
| } |
| break; |
| } |
| } |
| |
| static enum led_brightness picolcd_led_get_brightness(struct led_classdev *led_cdev) |
| { |
| struct device *dev; |
| struct hid_device *hdev; |
| struct picolcd_data *data; |
| int i, value = 0; |
| |
| dev = led_cdev->dev->parent; |
| hdev = container_of(dev, struct hid_device, dev); |
| data = hid_get_drvdata(hdev); |
| for (i = 0; i < 8; i++) |
| if (led_cdev == data->led[i]) { |
| value = (data->led_state >> i) & 1; |
| break; |
| } |
| return value ? LED_FULL : LED_OFF; |
| } |
| |
| static int picolcd_init_leds(struct picolcd_data *data, struct hid_report *report) |
| { |
| struct device *dev = &data->hdev->dev; |
| struct led_classdev *led; |
| size_t name_sz = strlen(dev_name(dev)) + 8; |
| char *name; |
| int i, ret = 0; |
| |
| if (!report) |
| return -ENODEV; |
| if (report->maxfield != 1 || report->field[0]->report_count != 1 || |
| report->field[0]->report_size != 8) { |
| dev_err(dev, "unsupported LED_STATE report"); |
| return -EINVAL; |
| } |
| |
| for (i = 0; i < 8; i++) { |
| led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL); |
| if (!led) { |
| dev_err(dev, "can't allocate memory for LED %d\n", i); |
| ret = -ENOMEM; |
| goto err; |
| } |
| name = (void *)(&led[1]); |
| snprintf(name, name_sz, "%s::GPO%d", dev_name(dev), i); |
| led->name = name; |
| led->brightness = 0; |
| led->max_brightness = 1; |
| led->brightness_get = picolcd_led_get_brightness; |
| led->brightness_set = picolcd_led_set_brightness; |
| |
| data->led[i] = led; |
| ret = led_classdev_register(dev, data->led[i]); |
| if (ret) { |
| data->led[i] = NULL; |
| kfree(led); |
| dev_err(dev, "can't register LED %d\n", i); |
| goto err; |
| } |
| } |
| return 0; |
| err: |
| for (i = 0; i < 8; i++) |
| if (data->led[i]) { |
| led = data->led[i]; |
| data->led[i] = NULL; |
| led_classdev_unregister(led); |
| kfree(led); |
| } |
| return ret; |
| } |
| |
| static void picolcd_exit_leds(struct picolcd_data *data) |
| { |
| struct led_classdev *led; |
| int i; |
| |
| for (i = 0; i < 8; i++) { |
| led = data->led[i]; |
| data->led[i] = NULL; |
| if (!led) |
| continue; |
| led_classdev_unregister(led); |
| kfree(led); |
| } |
| } |
| |
| #else |
| static inline int picolcd_init_leds(struct picolcd_data *data, |
| struct hid_report *report) |
| { |
| return 0; |
| } |
| static inline void picolcd_exit_leds(struct picolcd_data *data) |
| { |
| } |
| static inline int picolcd_leds_set(struct picolcd_data *data) |
| { |
| return 0; |
| } |
| #endif /* CONFIG_HID_PICOLCD_LEDS */ |
| |
| /* |
| * input class device |
| */ |
| static int picolcd_raw_keypad(struct picolcd_data *data, |
| struct hid_report *report, u8 *raw_data, int size) |
| { |
| /* |
| * Keypad event |
| * First and second data bytes list currently pressed keys, |
| * 0x00 means no key and at most 2 keys may be pressed at same time |
| */ |
| int i, j; |
| |
| /* determine newly pressed keys */ |
| for (i = 0; i < size; i++) { |
| unsigned int key_code; |
| if (raw_data[i] == 0) |
| continue; |
| for (j = 0; j < sizeof(data->pressed_keys); j++) |
| if (data->pressed_keys[j] == raw_data[i]) |
| goto key_already_down; |
| for (j = 0; j < sizeof(data->pressed_keys); j++) |
| if (data->pressed_keys[j] == 0) { |
| data->pressed_keys[j] = raw_data[i]; |
| break; |
| } |
| input_event(data->input_keys, EV_MSC, MSC_SCAN, raw_data[i]); |
| if (raw_data[i] < PICOLCD_KEYS) |
| key_code = data->keycode[raw_data[i]]; |
| else |
| key_code = KEY_UNKNOWN; |
| if (key_code != KEY_UNKNOWN) { |
| dbg_hid(PICOLCD_NAME " got key press for %u:%d", |
| raw_data[i], key_code); |
| input_report_key(data->input_keys, key_code, 1); |
| } |
| input_sync(data->input_keys); |
| key_already_down: |
| continue; |
| } |
| |
| /* determine newly released keys */ |
| for (j = 0; j < sizeof(data->pressed_keys); j++) { |
| unsigned int key_code; |
| if (data->pressed_keys[j] == 0) |
| continue; |
| for (i = 0; i < size; i++) |
| if (data->pressed_keys[j] == raw_data[i]) |
| goto key_still_down; |
| input_event(data->input_keys, EV_MSC, MSC_SCAN, data->pressed_keys[j]); |
| if (data->pressed_keys[j] < PICOLCD_KEYS) |
| key_code = data->keycode[data->pressed_keys[j]]; |
| else |
| key_code = KEY_UNKNOWN; |
| if (key_code != KEY_UNKNOWN) { |
| dbg_hid(PICOLCD_NAME " got key release for %u:%d", |
| data->pressed_keys[j], key_code); |
| input_report_key(data->input_keys, key_code, 0); |
| } |
| input_sync(data->input_keys); |
| data->pressed_keys[j] = 0; |
| key_still_down: |
| continue; |
| } |
| return 1; |
| } |
| |
| static int picolcd_raw_cir(struct picolcd_data *data, |
| struct hid_report *report, u8 *raw_data, int size) |
| { |
| /* Need understanding of CIR data format to implement ... */ |
| return 1; |
| } |
| |
| static int picolcd_check_version(struct hid_device *hdev) |
| { |
| struct picolcd_data *data = hid_get_drvdata(hdev); |
| struct picolcd_pending *verinfo; |
| int ret = 0; |
| |
| if (!data) |
| return -ENODEV; |
| |
| verinfo = picolcd_send_and_wait(hdev, REPORT_VERSION, NULL, 0); |
| if (!verinfo) { |
| dev_err(&hdev->dev, "no version response from PicoLCD"); |
| return -ENODEV; |
| } |
| |
| if (verinfo->raw_size == 2) { |
| data->version[0] = verinfo->raw_data[1]; |
| data->version[1] = verinfo->raw_data[0]; |
| if (data->status & PICOLCD_BOOTLOADER) { |
| dev_info(&hdev->dev, "PicoLCD, bootloader version %d.%d\n", |
| verinfo->raw_data[1], verinfo->raw_data[0]); |
| } else { |
| dev_info(&hdev->dev, "PicoLCD, firmware version %d.%d\n", |
| verinfo->raw_data[1], verinfo->raw_data[0]); |
| } |
| } else { |
| dev_err(&hdev->dev, "confused, got unexpected version response from PicoLCD\n"); |
| ret = -EINVAL; |
| } |
| kfree(verinfo); |
| return ret; |
| } |
| |
| /* |
| * Reset our device and wait for answer to VERSION request |
| */ |
| static int picolcd_reset(struct hid_device *hdev) |
| { |
| struct picolcd_data *data = hid_get_drvdata(hdev); |
| struct hid_report *report = picolcd_out_report(REPORT_RESET, hdev); |
| unsigned long flags; |
| int error; |
| |
| if (!data || !report || report->maxfield != 1) |
| return -ENODEV; |
| |
| spin_lock_irqsave(&data->lock, flags); |
| if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER) |
| data->status |= PICOLCD_BOOTLOADER; |
| |
| /* perform the reset */ |
| hid_set_field(report->field[0], 0, 1); |
| usbhid_submit_report(hdev, report, USB_DIR_OUT); |
| spin_unlock_irqrestore(&data->lock, flags); |
| |
| error = picolcd_check_version(hdev); |
| if (error) |
| return error; |
| |
| picolcd_resume_lcd(data); |
| picolcd_resume_backlight(data); |
| #ifdef CONFIG_HID_PICOLCD_FB |
| if (data->fb_info) |
| schedule_delayed_work(&data->fb_info->deferred_work, 0); |
| #endif /* CONFIG_HID_PICOLCD_FB */ |
| |
| picolcd_leds_set(data); |
| return 0; |
| } |
| |
| /* |
| * The "operation_mode" sysfs attribute |
| */ |
| static ssize_t picolcd_operation_mode_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct picolcd_data *data = dev_get_drvdata(dev); |
| |
| if (data->status & PICOLCD_BOOTLOADER) |
| return snprintf(buf, PAGE_SIZE, "[bootloader] lcd\n"); |
| else |
| return snprintf(buf, PAGE_SIZE, "bootloader [lcd]\n"); |
| } |
| |
| static ssize_t picolcd_operation_mode_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct picolcd_data *data = dev_get_drvdata(dev); |
| struct hid_report *report = NULL; |
| size_t cnt = count; |
| int timeout = data->opmode_delay; |
| unsigned long flags; |
| |
| if (cnt >= 3 && strncmp("lcd", buf, 3) == 0) { |
| if (data->status & PICOLCD_BOOTLOADER) |
| report = picolcd_out_report(REPORT_EXIT_FLASHER, data->hdev); |
| buf += 3; |
| cnt -= 3; |
| } else if (cnt >= 10 && strncmp("bootloader", buf, 10) == 0) { |
| if (!(data->status & PICOLCD_BOOTLOADER)) |
| report = picolcd_out_report(REPORT_EXIT_KEYBOARD, data->hdev); |
| buf += 10; |
| cnt -= 10; |
| } |
| if (!report) |
| return -EINVAL; |
| |
| while (cnt > 0 && (buf[cnt-1] == '\n' || buf[cnt-1] == '\r')) |
| cnt--; |
| if (cnt != 0) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&data->lock, flags); |
| hid_set_field(report->field[0], 0, timeout & 0xff); |
| hid_set_field(report->field[0], 1, (timeout >> 8) & 0xff); |
| usbhid_submit_report(data->hdev, report, USB_DIR_OUT); |
| spin_unlock_irqrestore(&data->lock, flags); |
| return count; |
| } |
| |
| static DEVICE_ATTR(operation_mode, 0644, picolcd_operation_mode_show, |
| picolcd_operation_mode_store); |
| |
| /* |
| * The "operation_mode_delay" sysfs attribute |
| */ |
| static ssize_t picolcd_operation_mode_delay_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct picolcd_data *data = dev_get_drvdata(dev); |
| |
| return snprintf(buf, PAGE_SIZE, "%hu\n", data->opmode_delay); |
| } |
| |
| static ssize_t picolcd_operation_mode_delay_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct picolcd_data *data = dev_get_drvdata(dev); |
| unsigned u; |
| if (sscanf(buf, "%u", &u) != 1) |
| return -EINVAL; |
| if (u > 30000) |
| return -EINVAL; |
| else |
| data->opmode_delay = u; |
| return count; |
| } |
| |
| static DEVICE_ATTR(operation_mode_delay, 0644, picolcd_operation_mode_delay_show, |
| picolcd_operation_mode_delay_store); |
| |
| |
| #ifdef CONFIG_DEBUG_FS |
| /* |
| * The "reset" file |
| */ |
| static int picolcd_debug_reset_show(struct seq_file *f, void *p) |
| { |
| if (picolcd_fbinfo((struct picolcd_data *)f->private)) |
| seq_printf(f, "all fb\n"); |
| else |
| seq_printf(f, "all\n"); |
| return 0; |
| } |
| |
| static int picolcd_debug_reset_open(struct inode *inode, struct file *f) |
| { |
| return single_open(f, picolcd_debug_reset_show, inode->i_private); |
| } |
| |
| static ssize_t picolcd_debug_reset_write(struct file *f, const char __user *user_buf, |
| size_t count, loff_t *ppos) |
| { |
| struct picolcd_data *data = ((struct seq_file *)f->private_data)->private; |
| char buf[32]; |
| size_t cnt = min(count, sizeof(buf)-1); |
| if (copy_from_user(buf, user_buf, cnt)) |
| return -EFAULT; |
| |
| while (cnt > 0 && (buf[cnt-1] == ' ' || buf[cnt-1] == '\n')) |
| cnt--; |
| buf[cnt] = '\0'; |
| if (strcmp(buf, "all") == 0) { |
| picolcd_reset(data->hdev); |
| picolcd_fb_reset(data, 1); |
| } else if (strcmp(buf, "fb") == 0) { |
| picolcd_fb_reset(data, 1); |
| } else { |
| return -EINVAL; |
| } |
| return count; |
| } |
| |
| static const struct file_operations picolcd_debug_reset_fops = { |
| .owner = THIS_MODULE, |
| .open = picolcd_debug_reset_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .write = picolcd_debug_reset_write, |
| .release = single_release, |
| }; |
| |
| /* |
| * The "eeprom" file |
| */ |
| static int picolcd_debug_eeprom_open(struct inode *i, struct file *f) |
| { |
| f->private_data = i->i_private; |
| return 0; |
| } |
| |
| static ssize_t picolcd_debug_eeprom_read(struct file *f, char __user *u, |
| size_t s, loff_t *off) |
| { |
| struct picolcd_data *data = f->private_data; |
| struct picolcd_pending *resp; |
| u8 raw_data[3]; |
| ssize_t ret = -EIO; |
| |
| if (s == 0) |
| return -EINVAL; |
| if (*off > 0x0ff) |
| return 0; |
| |
| /* prepare buffer with info about what we want to read (addr & len) */ |
| raw_data[0] = *off & 0xff; |
| raw_data[1] = (*off >> 8) && 0xff; |
| raw_data[2] = s < 20 ? s : 20; |
| if (*off + raw_data[2] > 0xff) |
| raw_data[2] = 0x100 - *off; |
| resp = picolcd_send_and_wait(data->hdev, REPORT_EE_READ, raw_data, |
| sizeof(raw_data)); |
| if (!resp) |
| return -EIO; |
| |
| if (resp->in_report && resp->in_report->id == REPORT_EE_DATA) { |
| /* successful read :) */ |
| ret = resp->raw_data[2]; |
| if (ret > s) |
| ret = s; |
| if (copy_to_user(u, resp->raw_data+3, ret)) |
| ret = -EFAULT; |
| else |
| *off += ret; |
| } /* anything else is some kind of IO error */ |
| |
| kfree(resp); |
| return ret; |
| } |
| |
| static ssize_t picolcd_debug_eeprom_write(struct file *f, const char __user *u, |
| size_t s, loff_t *off) |
| { |
| struct picolcd_data *data = f->private_data; |
| struct picolcd_pending *resp; |
| ssize_t ret = -EIO; |
| u8 raw_data[23]; |
| |
| if (s == 0) |
| return -EINVAL; |
| if (*off > 0x0ff) |
| return -ENOSPC; |
| |
| memset(raw_data, 0, sizeof(raw_data)); |
| raw_data[0] = *off & 0xff; |
| raw_data[1] = (*off >> 8) && 0xff; |
| raw_data[2] = s < 20 ? s : 20; |
| if (*off + raw_data[2] > 0xff) |
| raw_data[2] = 0x100 - *off; |
| |
| if (copy_from_user(raw_data+3, u, raw_data[2])) |
| return -EFAULT; |
| resp = picolcd_send_and_wait(data->hdev, REPORT_EE_WRITE, raw_data, |
| sizeof(raw_data)); |
| |
| if (!resp) |
| return -EIO; |
| |
| if (resp->in_report && resp->in_report->id == REPORT_EE_DATA) { |
| /* check if written data matches */ |
| if (memcmp(raw_data, resp->raw_data, 3+raw_data[2]) == 0) { |
| *off += raw_data[2]; |
| ret = raw_data[2]; |
| } |
| } |
| kfree(resp); |
| return ret; |
| } |
| |
| /* |
| * Notes: |
| * - read/write happens in chunks of at most 20 bytes, it's up to userspace |
| * to loop in order to get more data. |
| * - on write errors on otherwise correct write request the bytes |
| * that should have been written are in undefined state. |
| */ |
| static const struct file_operations picolcd_debug_eeprom_fops = { |
| .owner = THIS_MODULE, |
| .open = picolcd_debug_eeprom_open, |
| .read = picolcd_debug_eeprom_read, |
| .write = picolcd_debug_eeprom_write, |
| .llseek = generic_file_llseek, |
| }; |
| |
| /* |
| * The "flash" file |
| */ |
| static int picolcd_debug_flash_open(struct inode *i, struct file *f) |
| { |
| f->private_data = i->i_private; |
| return 0; |
| } |
| |
| /* record a flash address to buf (bounds check to be done by caller) */ |
| static int _picolcd_flash_setaddr(struct picolcd_data *data, u8 *buf, long off) |
| { |
| buf[0] = off & 0xff; |
| buf[1] = (off >> 8) & 0xff; |
| if (data->addr_sz == 3) |
| buf[2] = (off >> 16) & 0xff; |
| return data->addr_sz == 2 ? 2 : 3; |
| } |
| |
| /* read a given size of data (bounds check to be done by caller) */ |
| static ssize_t _picolcd_flash_read(struct picolcd_data *data, int report_id, |
| char __user *u, size_t s, loff_t *off) |
| { |
| struct picolcd_pending *resp; |
| u8 raw_data[4]; |
| ssize_t ret = 0; |
| int len_off, err = -EIO; |
| |
| while (s > 0) { |
| err = -EIO; |
| len_off = _picolcd_flash_setaddr(data, raw_data, *off); |
| raw_data[len_off] = s > 32 ? 32 : s; |
| resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off+1); |
| if (!resp || !resp->in_report) |
| goto skip; |
| if (resp->in_report->id == REPORT_MEMORY || |
| resp->in_report->id == REPORT_BL_READ_MEMORY) { |
| if (memcmp(raw_data, resp->raw_data, len_off+1) != 0) |
| goto skip; |
| if (copy_to_user(u+ret, resp->raw_data+len_off+1, raw_data[len_off])) { |
| err = -EFAULT; |
| goto skip; |
| } |
| *off += raw_data[len_off]; |
| s -= raw_data[len_off]; |
| ret += raw_data[len_off]; |
| err = 0; |
| } |
| skip: |
| kfree(resp); |
| if (err) |
| return ret > 0 ? ret : err; |
| } |
| return ret; |
| } |
| |
| static ssize_t picolcd_debug_flash_read(struct file *f, char __user *u, |
| size_t s, loff_t *off) |
| { |
| struct picolcd_data *data = f->private_data; |
| |
| if (s == 0) |
| return -EINVAL; |
| if (*off > 0x05fff) |
| return 0; |
| if (*off + s > 0x05fff) |
| s = 0x06000 - *off; |
| |
| if (data->status & PICOLCD_BOOTLOADER) |
| return _picolcd_flash_read(data, REPORT_BL_READ_MEMORY, u, s, off); |
| else |
| return _picolcd_flash_read(data, REPORT_READ_MEMORY, u, s, off); |
| } |
| |
| /* erase block aligned to 64bytes boundary */ |
| static ssize_t _picolcd_flash_erase64(struct picolcd_data *data, int report_id, |
| loff_t *off) |
| { |
| struct picolcd_pending *resp; |
| u8 raw_data[3]; |
| int len_off; |
| ssize_t ret = -EIO; |
| |
| if (*off & 0x3f) |
| return -EINVAL; |
| |
| len_off = _picolcd_flash_setaddr(data, raw_data, *off); |
| resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off); |
| if (!resp || !resp->in_report) |
| goto skip; |
| if (resp->in_report->id == REPORT_MEMORY || |
| resp->in_report->id == REPORT_BL_ERASE_MEMORY) { |
| if (memcmp(raw_data, resp->raw_data, len_off) != 0) |
| goto skip; |
| ret = 0; |
| } |
| skip: |
| kfree(resp); |
| return ret; |
| } |
| |
| /* write a given size of data (bounds check to be done by caller) */ |
| static ssize_t _picolcd_flash_write(struct picolcd_data *data, int report_id, |
| const char __user *u, size_t s, loff_t *off) |
| { |
| struct picolcd_pending *resp; |
| u8 raw_data[36]; |
| ssize_t ret = 0; |
| int len_off, err = -EIO; |
| |
| while (s > 0) { |
| err = -EIO; |
| len_off = _picolcd_flash_setaddr(data, raw_data, *off); |
| raw_data[len_off] = s > 32 ? 32 : s; |
| if (copy_from_user(raw_data+len_off+1, u, raw_data[len_off])) { |
| err = -EFAULT; |
| break; |
| } |
| resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, |
| len_off+1+raw_data[len_off]); |
| if (!resp || !resp->in_report) |
| goto skip; |
| if (resp->in_report->id == REPORT_MEMORY || |
| resp->in_report->id == REPORT_BL_WRITE_MEMORY) { |
| if (memcmp(raw_data, resp->raw_data, len_off+1+raw_data[len_off]) != 0) |
| goto skip; |
| *off += raw_data[len_off]; |
| s -= raw_data[len_off]; |
| ret += raw_data[len_off]; |
| err = 0; |
| } |
| skip: |
| kfree(resp); |
| if (err) |
| break; |
| } |
| return ret > 0 ? ret : err; |
| } |
| |
| static ssize_t picolcd_debug_flash_write(struct file *f, const char __user *u, |
| size_t s, loff_t *off) |
| { |
| struct picolcd_data *data = f->private_data; |
| ssize_t err, ret = 0; |
| int report_erase, report_write; |
| |
| if (s == 0) |
| return -EINVAL; |
| if (*off > 0x5fff) |
| return -ENOSPC; |
| if (s & 0x3f) |
| return -EINVAL; |
| if (*off & 0x3f) |
| return -EINVAL; |
| |
| if (data->status & PICOLCD_BOOTLOADER) { |
| report_erase = REPORT_BL_ERASE_MEMORY; |
| report_write = REPORT_BL_WRITE_MEMORY; |
| } else { |
| report_erase = REPORT_ERASE_MEMORY; |
| report_write = REPORT_WRITE_MEMORY; |
| } |
| mutex_lock(&data->mutex_flash); |
| while (s > 0) { |
| err = _picolcd_flash_erase64(data, report_erase, off); |
| if (err) |
| break; |
| err = _picolcd_flash_write(data, report_write, u, 64, off); |
| if (err < 0) |
| break; |
| ret += err; |
| *off += err; |
| s -= err; |
| if (err != 64) |
| break; |
| } |
| mutex_unlock(&data->mutex_flash); |
| return ret > 0 ? ret : err; |
| } |
| |
| /* |
| * Notes: |
| * - concurrent writing is prevented by mutex and all writes must be |
| * n*64 bytes and 64-byte aligned, each write being preceeded by an |
| * ERASE which erases a 64byte block. |
| * If less than requested was written or an error is returned for an |
| * otherwise correct write request the next 64-byte block which should |
| * have been written is in undefined state (mostly: original, erased, |
| * (half-)written with write error) |
| * - reading can happend without special restriction |
| */ |
| static const struct file_operations picolcd_debug_flash_fops = { |
| .owner = THIS_MODULE, |
| .open = picolcd_debug_flash_open, |
| .read = picolcd_debug_flash_read, |
| .write = picolcd_debug_flash_write, |
| .llseek = generic_file_llseek, |
| }; |
| |
| |
| /* |
| * Helper code for HID report level dumping/debugging |
| */ |
| static const char *error_codes[] = { |
| "success", "parameter missing", "data_missing", "block readonly", |
| "block not erasable", "block too big", "section overflow", |
| "invalid command length", "invalid data length", |
| }; |
| |
| static void dump_buff_as_hex(char *dst, size_t dst_sz, const u8 *data, |
| const size_t data_len) |
| { |
| int i, j; |
| for (i = j = 0; i < data_len && j + 3 < dst_sz; i++) { |
| dst[j++] = hex_asc[(data[i] >> 4) & 0x0f]; |
| dst[j++] = hex_asc[data[i] & 0x0f]; |
| dst[j++] = ' '; |
| } |
| if (j < dst_sz) { |
| dst[j--] = '\0'; |
| dst[j] = '\n'; |
| } else |
| dst[j] = '\0'; |
| } |
| |
| static void picolcd_debug_out_report(struct picolcd_data *data, |
| struct hid_device *hdev, struct hid_report *report) |
| { |
| u8 raw_data[70]; |
| int raw_size = (report->size >> 3) + 1; |
| char *buff; |
| #define BUFF_SZ 256 |
| |
| /* Avoid unnecessary overhead if debugfs is disabled */ |
| if (!hdev->debug_events) |
| return; |
| |
| buff = kmalloc(BUFF_SZ, GFP_ATOMIC); |
| if (!buff) |
| return; |
| |
| snprintf(buff, BUFF_SZ, "\nout report %d (size %d) = ", |
| report->id, raw_size); |
| hid_debug_event(hdev, buff); |
| if (raw_size + 5 > sizeof(raw_data)) { |
| hid_debug_event(hdev, " TOO BIG\n"); |
| return; |
| } else { |
| raw_data[0] = report->id; |
| hid_output_report(report, raw_data); |
| dump_buff_as_hex(buff, BUFF_SZ, raw_data, raw_size); |
| hid_debug_event(hdev, buff); |
| } |
| |
| switch (report->id) { |
| case REPORT_LED_STATE: |
| /* 1 data byte with GPO state */ |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_LED_STATE", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tGPO state: 0x%02x\n", raw_data[1]); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_BRIGHTNESS: |
| /* 1 data byte with brightness */ |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_BRIGHTNESS", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tBrightness: 0x%02x\n", raw_data[1]); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_CONTRAST: |
| /* 1 data byte with contrast */ |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_CONTRAST", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tContrast: 0x%02x\n", raw_data[1]); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_RESET: |
| /* 2 data bytes with reset duration in ms */ |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_RESET", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tDuration: 0x%02x%02x (%dms)\n", |
| raw_data[2], raw_data[1], raw_data[2] << 8 | raw_data[1]); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_LCD_CMD: |
| /* 63 data bytes with LCD commands */ |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_LCD_CMD", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| /* TODO: format decoding */ |
| break; |
| case REPORT_LCD_DATA: |
| /* 63 data bytes with LCD data */ |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_LCD_CMD", report->id, raw_size-1); |
| /* TODO: format decoding */ |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_LCD_CMD_DATA: |
| /* 63 data bytes with LCD commands and data */ |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_LCD_CMD", report->id, raw_size-1); |
| /* TODO: format decoding */ |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_EE_READ: |
| /* 3 data bytes with read area description */ |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_EE_READ", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", |
| raw_data[2], raw_data[1]); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_EE_WRITE: |
| /* 3+1..20 data bytes with write area description */ |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_EE_WRITE", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", |
| raw_data[2], raw_data[1]); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); |
| hid_debug_event(hdev, buff); |
| if (raw_data[3] == 0) { |
| snprintf(buff, BUFF_SZ, "\tNo data\n"); |
| } else if (raw_data[3] + 4 <= raw_size) { |
| snprintf(buff, BUFF_SZ, "\tData: "); |
| hid_debug_event(hdev, buff); |
| dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]); |
| } else { |
| snprintf(buff, BUFF_SZ, "\tData overflowed\n"); |
| } |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_ERASE_MEMORY: |
| case REPORT_BL_ERASE_MEMORY: |
| /* 3 data bytes with pointer inside erase block */ |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_ERASE_MEMORY", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| switch (data->addr_sz) { |
| case 2: |
| snprintf(buff, BUFF_SZ, "\tAddress inside 64 byte block: 0x%02x%02x\n", |
| raw_data[2], raw_data[1]); |
| break; |
| case 3: |
| snprintf(buff, BUFF_SZ, "\tAddress inside 64 byte block: 0x%02x%02x%02x\n", |
| raw_data[3], raw_data[2], raw_data[1]); |
| break; |
| default: |
| snprintf(buff, BUFF_SZ, "\tNot supported\n"); |
| } |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_READ_MEMORY: |
| case REPORT_BL_READ_MEMORY: |
| /* 4 data bytes with read area description */ |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_READ_MEMORY", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| switch (data->addr_sz) { |
| case 2: |
| snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", |
| raw_data[2], raw_data[1]); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); |
| break; |
| case 3: |
| snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n", |
| raw_data[3], raw_data[2], raw_data[1]); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]); |
| break; |
| default: |
| snprintf(buff, BUFF_SZ, "\tNot supported\n"); |
| } |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_WRITE_MEMORY: |
| case REPORT_BL_WRITE_MEMORY: |
| /* 4+1..32 data bytes with write adrea description */ |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_WRITE_MEMORY", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| switch (data->addr_sz) { |
| case 2: |
| snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", |
| raw_data[2], raw_data[1]); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); |
| hid_debug_event(hdev, buff); |
| if (raw_data[3] == 0) { |
| snprintf(buff, BUFF_SZ, "\tNo data\n"); |
| } else if (raw_data[3] + 4 <= raw_size) { |
| snprintf(buff, BUFF_SZ, "\tData: "); |
| hid_debug_event(hdev, buff); |
| dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]); |
| } else { |
| snprintf(buff, BUFF_SZ, "\tData overflowed\n"); |
| } |
| break; |
| case 3: |
| snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n", |
| raw_data[3], raw_data[2], raw_data[1]); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]); |
| hid_debug_event(hdev, buff); |
| if (raw_data[4] == 0) { |
| snprintf(buff, BUFF_SZ, "\tNo data\n"); |
| } else if (raw_data[4] + 5 <= raw_size) { |
| snprintf(buff, BUFF_SZ, "\tData: "); |
| hid_debug_event(hdev, buff); |
| dump_buff_as_hex(buff, BUFF_SZ, raw_data+5, raw_data[4]); |
| } else { |
| snprintf(buff, BUFF_SZ, "\tData overflowed\n"); |
| } |
| break; |
| default: |
| snprintf(buff, BUFF_SZ, "\tNot supported\n"); |
| } |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_SPLASH_RESTART: |
| /* TODO */ |
| break; |
| case REPORT_EXIT_KEYBOARD: |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_EXIT_KEYBOARD", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tRestart delay: %dms (0x%02x%02x)\n", |
| raw_data[1] | (raw_data[2] << 8), |
| raw_data[2], raw_data[1]); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_VERSION: |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_VERSION", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_DEVID: |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_DEVID", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_SPLASH_SIZE: |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_SPLASH_SIZE", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_HOOK_VERSION: |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_HOOK_VERSION", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_EXIT_FLASHER: |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "REPORT_VERSION", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tRestart delay: %dms (0x%02x%02x)\n", |
| raw_data[1] | (raw_data[2] << 8), |
| raw_data[2], raw_data[1]); |
| hid_debug_event(hdev, buff); |
| break; |
| default: |
| snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
| "<unknown>", report->id, raw_size-1); |
| hid_debug_event(hdev, buff); |
| break; |
| } |
| wake_up_interruptible(&hdev->debug_wait); |
| kfree(buff); |
| } |
| |
| static void picolcd_debug_raw_event(struct picolcd_data *data, |
| struct hid_device *hdev, struct hid_report *report, |
| u8 *raw_data, int size) |
| { |
| char *buff; |
| |
| #define BUFF_SZ 256 |
| /* Avoid unnecessary overhead if debugfs is disabled */ |
| if (!hdev->debug_events) |
| return; |
| |
| buff = kmalloc(BUFF_SZ, GFP_ATOMIC); |
| if (!buff) |
| return; |
| |
| switch (report->id) { |
| case REPORT_ERROR_CODE: |
| /* 2 data bytes with affected report and error code */ |
| snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
| "REPORT_ERROR_CODE", report->id, size-1); |
| hid_debug_event(hdev, buff); |
| if (raw_data[2] < ARRAY_SIZE(error_codes)) |
| snprintf(buff, BUFF_SZ, "\tError code 0x%02x (%s) in reply to report 0x%02x\n", |
| raw_data[2], error_codes[raw_data[2]], raw_data[1]); |
| else |
| snprintf(buff, BUFF_SZ, "\tError code 0x%02x in reply to report 0x%02x\n", |
| raw_data[2], raw_data[1]); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_KEY_STATE: |
| /* 2 data bytes with key state */ |
| snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
| "REPORT_KEY_STATE", report->id, size-1); |
| hid_debug_event(hdev, buff); |
| if (raw_data[1] == 0) |
| snprintf(buff, BUFF_SZ, "\tNo key pressed\n"); |
| else if (raw_data[2] == 0) |
| snprintf(buff, BUFF_SZ, "\tOne key pressed: 0x%02x (%d)\n", |
| raw_data[1], raw_data[1]); |
| else |
| snprintf(buff, BUFF_SZ, "\tTwo keys pressed: 0x%02x (%d), 0x%02x (%d)\n", |
| raw_data[1], raw_data[1], raw_data[2], raw_data[2]); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_IR_DATA: |
| /* Up to 20 byes of IR scancode data */ |
| snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
| "REPORT_IR_DATA", report->id, size-1); |
| hid_debug_event(hdev, buff); |
| if (raw_data[1] == 0) { |
| snprintf(buff, BUFF_SZ, "\tUnexpectedly 0 data length\n"); |
| hid_debug_event(hdev, buff); |
| } else if (raw_data[1] + 1 <= size) { |
| snprintf(buff, BUFF_SZ, "\tData length: %d\n\tIR Data: ", |
| raw_data[1]-1); |
| hid_debug_event(hdev, buff); |
| dump_buff_as_hex(buff, BUFF_SZ, raw_data+2, raw_data[1]-1); |
| hid_debug_event(hdev, buff); |
| } else { |
| snprintf(buff, BUFF_SZ, "\tOverflowing data length: %d\n", |
| raw_data[1]-1); |
| hid_debug_event(hdev, buff); |
| } |
| break; |
| case REPORT_EE_DATA: |
| /* Data buffer in response to REPORT_EE_READ or REPORT_EE_WRITE */ |
| snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
| "REPORT_EE_DATA", report->id, size-1); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", |
| raw_data[2], raw_data[1]); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); |
| hid_debug_event(hdev, buff); |
| if (raw_data[3] == 0) { |
| snprintf(buff, BUFF_SZ, "\tNo data\n"); |
| hid_debug_event(hdev, buff); |
| } else if (raw_data[3] + 4 <= size) { |
| snprintf(buff, BUFF_SZ, "\tData: "); |
| hid_debug_event(hdev, buff); |
| dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]); |
| hid_debug_event(hdev, buff); |
| } else { |
| snprintf(buff, BUFF_SZ, "\tData overflowed\n"); |
| hid_debug_event(hdev, buff); |
| } |
| break; |
| case REPORT_MEMORY: |
| /* Data buffer in response to REPORT_READ_MEMORY or REPORT_WRTIE_MEMORY */ |
| snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
| "REPORT_MEMORY", report->id, size-1); |
| hid_debug_event(hdev, buff); |
| switch (data->addr_sz) { |
| case 2: |
| snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", |
| raw_data[2], raw_data[1]); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); |
| hid_debug_event(hdev, buff); |
| if (raw_data[3] == 0) { |
| snprintf(buff, BUFF_SZ, "\tNo data\n"); |
| } else if (raw_data[3] + 4 <= size) { |
| snprintf(buff, BUFF_SZ, "\tData: "); |
| hid_debug_event(hdev, buff); |
| dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]); |
| } else { |
| snprintf(buff, BUFF_SZ, "\tData overflowed\n"); |
| } |
| break; |
| case 3: |
| snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n", |
| raw_data[3], raw_data[2], raw_data[1]); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]); |
| hid_debug_event(hdev, buff); |
| if (raw_data[4] == 0) { |
| snprintf(buff, BUFF_SZ, "\tNo data\n"); |
| } else if (raw_data[4] + 5 <= size) { |
| snprintf(buff, BUFF_SZ, "\tData: "); |
| hid_debug_event(hdev, buff); |
| dump_buff_as_hex(buff, BUFF_SZ, raw_data+5, raw_data[4]); |
| } else { |
| snprintf(buff, BUFF_SZ, "\tData overflowed\n"); |
| } |
| break; |
| default: |
| snprintf(buff, BUFF_SZ, "\tNot supported\n"); |
| } |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_VERSION: |
| snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
| "REPORT_VERSION", report->id, size-1); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tFirmware version: %d.%d\n", |
| raw_data[2], raw_data[1]); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_BL_ERASE_MEMORY: |
| snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
| "REPORT_BL_ERASE_MEMORY", report->id, size-1); |
| hid_debug_event(hdev, buff); |
| /* TODO */ |
| break; |
| case REPORT_BL_READ_MEMORY: |
| snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
| "REPORT_BL_READ_MEMORY", report->id, size-1); |
| hid_debug_event(hdev, buff); |
| /* TODO */ |
| break; |
| case REPORT_BL_WRITE_MEMORY: |
| snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
| "REPORT_BL_WRITE_MEMORY", report->id, size-1); |
| hid_debug_event(hdev, buff); |
| /* TODO */ |
| break; |
| case REPORT_DEVID: |
| snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
| "REPORT_DEVID", report->id, size-1); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tSerial: 0x%02x%02x%02x%02x\n", |
| raw_data[1], raw_data[2], raw_data[3], raw_data[4]); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tType: 0x%02x\n", |
| raw_data[5]); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_SPLASH_SIZE: |
| snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
| "REPORT_SPLASH_SIZE", report->id, size-1); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tTotal splash space: %d\n", |
| (raw_data[2] << 8) | raw_data[1]); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tUsed splash space: %d\n", |
| (raw_data[4] << 8) | raw_data[3]); |
| hid_debug_event(hdev, buff); |
| break; |
| case REPORT_HOOK_VERSION: |
| snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
| "REPORT_HOOK_VERSION", report->id, size-1); |
| hid_debug_event(hdev, buff); |
| snprintf(buff, BUFF_SZ, "\tFirmware version: %d.%d\n", |
| raw_data[1], raw_data[2]); |
| hid_debug_event(hdev, buff); |
| break; |
| default: |
| snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
| "<unknown>", report->id, size-1); |
| hid_debug_event(hdev, buff); |
| break; |
| } |
| wake_up_interruptible(&hdev->debug_wait); |
| kfree(buff); |
| } |
| |
| static void picolcd_init_devfs(struct picolcd_data *data, |
| struct hid_report *eeprom_r, struct hid_report *eeprom_w, |
| struct hid_report *flash_r, struct hid_report *flash_w, |
| struct hid_report *reset) |
| { |
| struct hid_device *hdev = data->hdev; |
| |
| mutex_init(&data->mutex_flash); |
| |
| /* reset */ |
| if (reset) |
| data->debug_reset = debugfs_create_file("reset", 0600, |
| hdev->debug_dir, data, &picolcd_debug_reset_fops); |
| |
| /* eeprom */ |
| if (eeprom_r || eeprom_w) |
| data->debug_eeprom = debugfs_create_file("eeprom", |
| (eeprom_w ? S_IWUSR : 0) | (eeprom_r ? S_IRUSR : 0), |
| hdev->debug_dir, data, &picolcd_debug_eeprom_fops); |
| |
| /* flash */ |
| if (flash_r && flash_r->maxfield == 1 && flash_r->field[0]->report_size == 8) |
| data->addr_sz = flash_r->field[0]->report_count - 1; |
| else |
| data->addr_sz = -1; |
| if (data->addr_sz == 2 || data->addr_sz == 3) { |
| data->debug_flash = debugfs_create_file("flash", |
| (flash_w ? S_IWUSR : 0) | (flash_r ? S_IRUSR : 0), |
| hdev->debug_dir, data, &picolcd_debug_flash_fops); |
| } else if (flash_r || flash_w) |
| dev_warn(&hdev->dev, "Unexpected FLASH access reports, " |
| "please submit rdesc for review\n"); |
| } |
| |
| static void picolcd_exit_devfs(struct picolcd_data *data) |
| { |
| struct dentry *dent; |
| |
| dent = data->debug_reset; |
| data->debug_reset = NULL; |
| if (dent) |
| debugfs_remove(dent); |
| dent = data->debug_eeprom; |
| data->debug_eeprom = NULL; |
| if (dent) |
| debugfs_remove(dent); |
| dent = data->debug_flash; |
| data->debug_flash = NULL; |
| if (dent) |
| debugfs_remove(dent); |
| mutex_destroy(&data->mutex_flash); |
| } |
| #else |
| static inline void picolcd_debug_raw_event(struct picolcd_data *data, |
| struct hid_device *hdev, struct hid_report *report, |
| u8 *raw_data, int size) |
| { |
| } |
| static inline void picolcd_init_devfs(struct picolcd_data *data, |
| struct hid_report *eeprom_r, struct hid_report *eeprom_w, |
| struct hid_report *flash_r, struct hid_report *flash_w, |
| struct hid_report *reset) |
| { |
| } |
| static inline void picolcd_exit_devfs(struct picolcd_data *data) |
| { |
| } |
| #endif /* CONFIG_DEBUG_FS */ |
| |
| /* |
| * Handle raw report as sent by device |
| */ |
| static int picolcd_raw_event(struct hid_device *hdev, |
| struct hid_report *report, u8 *raw_data, int size) |
| { |
| struct picolcd_data *data = hid_get_drvdata(hdev); |
| unsigned long flags; |
| int ret = 0; |
| |
| if (!data) |
| return 1; |
| |
| if (report->id == REPORT_KEY_STATE) { |
| if (data->input_keys) |
| ret = picolcd_raw_keypad(data, report, raw_data+1, size-1); |
| } else if (report->id == REPORT_IR_DATA) { |
| if (data->input_cir) |
| ret = picolcd_raw_cir(data, report, raw_data+1, size-1); |
| } else { |
| spin_lock_irqsave(&data->lock, flags); |
| /* |
| * We let the caller of picolcd_send_and_wait() check if the |
| * report we got is one of the expected ones or not. |
| */ |
| if (data->pending) { |
| memcpy(data->pending->raw_data, raw_data+1, size-1); |
| data->pending->raw_size = size-1; |
| data->pending->in_report = report; |
| complete(&data->pending->ready); |
| } |
| spin_unlock_irqrestore(&data->lock, flags); |
| } |
| |
| picolcd_debug_raw_event(data, hdev, report, raw_data, size); |
| return 1; |
| } |
| |
| #ifdef CONFIG_PM |
| static int picolcd_suspend(struct hid_device *hdev, pm_message_t message) |
| { |
| if (message.event & PM_EVENT_AUTO) |
| return 0; |
| |
| picolcd_suspend_backlight(hid_get_drvdata(hdev)); |
| dbg_hid(PICOLCD_NAME " device ready for suspend\n"); |
| return 0; |
| } |
| |
| static int picolcd_resume(struct hid_device *hdev) |
| { |
| int ret; |
| ret = picolcd_resume_backlight(hid_get_drvdata(hdev)); |
| if (ret) |
| dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret); |
| return 0; |
| } |
| |
| static int picolcd_reset_resume(struct hid_device *hdev) |
| { |
| int ret; |
| ret = picolcd_reset(hdev); |
| if (ret) |
| dbg_hid(PICOLCD_NAME " resetting our device failed: %d\n", ret); |
| ret = picolcd_fb_reset(hid_get_drvdata(hdev), 0); |
| if (ret) |
| dbg_hid(PICOLCD_NAME " restoring framebuffer content failed: %d\n", ret); |
| ret = picolcd_resume_lcd(hid_get_drvdata(hdev)); |
| if (ret) |
| dbg_hid(PICOLCD_NAME " restoring lcd failed: %d\n", ret); |
| ret = picolcd_resume_backlight(hid_get_drvdata(hdev)); |
| if (ret) |
| dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret); |
| picolcd_leds_set(hid_get_drvdata(hdev)); |
| return 0; |
| } |
| #endif |
| |
| /* initialize keypad input device */ |
| static int picolcd_init_keys(struct picolcd_data *data, |
| struct hid_report *report) |
| { |
| struct hid_device *hdev = data->hdev; |
| struct input_dev *idev; |
| int error, i; |
| |
| if (!report) |
| return -ENODEV; |
| if (report->maxfield != 1 || report->field[0]->report_count != 2 || |
| report->field[0]->report_size != 8) { |
| dev_err(&hdev->dev, "unsupported KEY_STATE report"); |
| return -EINVAL; |
| } |
| |
| idev = input_allocate_device(); |
| if (idev == NULL) { |
| dev_err(&hdev->dev, "failed to allocate input device"); |
| return -ENOMEM; |
| } |
| input_set_drvdata(idev, hdev); |
| memcpy(data->keycode, def_keymap, sizeof(def_keymap)); |
| idev->name = hdev->name; |
| idev->phys = hdev->phys; |
| idev->uniq = hdev->uniq; |
| idev->id.bustype = hdev->bus; |
| idev->id.vendor = hdev->vendor; |
| idev->id.product = hdev->product; |
| idev->id.version = hdev->version; |
| idev->dev.parent = hdev->dev.parent; |
| idev->keycode = &data->keycode; |
| idev->keycodemax = PICOLCD_KEYS; |
| idev->keycodesize = sizeof(data->keycode[0]); |
| input_set_capability(idev, EV_MSC, MSC_SCAN); |
| set_bit(EV_REP, idev->evbit); |
| for (i = 0; i < PICOLCD_KEYS; i++) |
| input_set_capability(idev, EV_KEY, data->keycode[i]); |
| error = input_register_device(idev); |
| if (error) { |
| dev_err(&hdev->dev, "error registering the input device"); |
| input_free_device(idev); |
| return error; |
| } |
| data->input_keys = idev; |
| return 0; |
| } |
| |
| static void picolcd_exit_keys(struct picolcd_data *data) |
| { |
| struct input_dev *idev = data->input_keys; |
| |
| data->input_keys = NULL; |
| if (idev) |
| input_unregister_device(idev); |
| } |
| |
| /* initialize CIR input device */ |
| static inline int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report) |
| { |
| /* support not implemented yet */ |
| return 0; |
| } |
| |
| static inline void picolcd_exit_cir(struct picolcd_data *data) |
| { |
| } |
| |
| static int picolcd_probe_lcd(struct hid_device *hdev, struct picolcd_data *data) |
| { |
| int error; |
| |
| error = picolcd_check_version(hdev); |
| if (error) |
| return error; |
| |
| if (data->version[0] != 0 && data->version[1] != 3) |
| dev_info(&hdev->dev, "Device with untested firmware revision, " |
| "please submit /sys/kernel/debug/hid/%s/rdesc for this device.\n", |
| dev_name(&hdev->dev)); |
| |
| /* Setup keypad input device */ |
| error = picolcd_init_keys(data, picolcd_in_report(REPORT_KEY_STATE, hdev)); |
| if (error) |
| goto err; |
| |
| /* Setup CIR input device */ |
| error = picolcd_init_cir(data, picolcd_in_report(REPORT_IR_DATA, hdev)); |
| if (error) |
| goto err; |
| |
| /* Set up the framebuffer device */ |
| error = picolcd_init_framebuffer(data); |
| if (error) |
| goto err; |
| |
| /* Setup lcd class device */ |
| error = picolcd_init_lcd(data, picolcd_out_report(REPORT_CONTRAST, hdev)); |
| if (error) |
| goto err; |
| |
| /* Setup backlight class device */ |
| error = picolcd_init_backlight(data, picolcd_out_report(REPORT_BRIGHTNESS, hdev)); |
| if (error) |
| goto err; |
| |
| /* Setup the LED class devices */ |
| error = picolcd_init_leds(data, picolcd_out_report(REPORT_LED_STATE, hdev)); |
| if (error) |
| goto err; |
| |
| picolcd_init_devfs(data, picolcd_out_report(REPORT_EE_READ, hdev), |
| picolcd_out_report(REPORT_EE_WRITE, hdev), |
| picolcd_out_report(REPORT_READ_MEMORY, hdev), |
| picolcd_out_report(REPORT_WRITE_MEMORY, hdev), |
| picolcd_out_report(REPORT_RESET, hdev)); |
| return 0; |
| err: |
| picolcd_exit_leds(data); |
| picolcd_exit_backlight(data); |
| picolcd_exit_lcd(data); |
| picolcd_exit_framebuffer(data); |
| picolcd_exit_cir(data); |
| picolcd_exit_keys(data); |
| return error; |
| } |
| |
| static int picolcd_probe_bootloader(struct hid_device *hdev, struct picolcd_data *data) |
| { |
| int error; |
| |
| error = picolcd_check_version(hdev); |
| if (error) |
| return error; |
| |
| if (data->version[0] != 1 && data->version[1] != 0) |
| dev_info(&hdev->dev, "Device with untested bootloader revision, " |
| "please submit /sys/kernel/debug/hid/%s/rdesc for this device.\n", |
| dev_name(&hdev->dev)); |
| |
| picolcd_init_devfs(data, NULL, NULL, |
| picolcd_out_report(REPORT_BL_READ_MEMORY, hdev), |
| picolcd_out_report(REPORT_BL_WRITE_MEMORY, hdev), NULL); |
| return 0; |
| } |
| |
| static int picolcd_probe(struct hid_device *hdev, |
| const struct hid_device_id *id) |
| { |
| struct picolcd_data *data; |
| int error = -ENOMEM; |
| |
| dbg_hid(PICOLCD_NAME " hardware probe...\n"); |
| |
| /* |
| * Let's allocate the picolcd data structure, set some reasonable |
| * defaults, and associate it with the device |
| */ |
| data = kzalloc(sizeof(struct picolcd_data), GFP_KERNEL); |
| if (data == NULL) { |
| dev_err(&hdev->dev, "can't allocate space for Minibox PicoLCD device data\n"); |
| error = -ENOMEM; |
| goto err_no_cleanup; |
| } |
| |
| spin_lock_init(&data->lock); |
| mutex_init(&data->mutex); |
| data->hdev = hdev; |
| data->opmode_delay = 5000; |
| if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER) |
| data->status |= PICOLCD_BOOTLOADER; |
| hid_set_drvdata(hdev, data); |
| |
| /* Parse the device reports and start it up */ |
| error = hid_parse(hdev); |
| if (error) { |
| dev_err(&hdev->dev, "device report parse failed\n"); |
| goto err_cleanup_data; |
| } |
| |
| /* We don't use hidinput but hid_hw_start() fails if nothing is |
| * claimed. So spoof claimed input. */ |
| hdev->claimed = HID_CLAIMED_INPUT; |
| error = hid_hw_start(hdev, 0); |
| hdev->claimed = 0; |
| if (error) { |
| dev_err(&hdev->dev, "hardware start failed\n"); |
| goto err_cleanup_data; |
| } |
| |
| error = hdev->ll_driver->open(hdev); |
| if (error) { |
| dev_err(&hdev->dev, "failed to open input interrupt pipe for key and IR events\n"); |
| goto err_cleanup_hid_hw; |
| } |
| |
| error = device_create_file(&hdev->dev, &dev_attr_operation_mode_delay); |
| if (error) { |
| dev_err(&hdev->dev, "failed to create sysfs attributes\n"); |
| goto err_cleanup_hid_ll; |
| } |
| |
| error = device_create_file(&hdev->dev, &dev_attr_operation_mode); |
| if (error) { |
| dev_err(&hdev->dev, "failed to create sysfs attributes\n"); |
| goto err_cleanup_sysfs1; |
| } |
| |
| if (data->status & PICOLCD_BOOTLOADER) |
| error = picolcd_probe_bootloader(hdev, data); |
| else |
| error = picolcd_probe_lcd(hdev, data); |
| if (error) |
| goto err_cleanup_sysfs2; |
| |
| dbg_hid(PICOLCD_NAME " activated and initialized\n"); |
| return 0; |
| |
| err_cleanup_sysfs2: |
| device_remove_file(&hdev->dev, &dev_attr_operation_mode); |
| err_cleanup_sysfs1: |
| device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay); |
| err_cleanup_hid_ll: |
| hdev->ll_driver->close(hdev); |
| err_cleanup_hid_hw: |
| hid_hw_stop(hdev); |
| err_cleanup_data: |
| kfree(data); |
| err_no_cleanup: |
| hid_set_drvdata(hdev, NULL); |
| |
| return error; |
| } |
| |
| static void picolcd_remove(struct hid_device *hdev) |
| { |
| struct picolcd_data *data = hid_get_drvdata(hdev); |
| unsigned long flags; |
| |
| dbg_hid(PICOLCD_NAME " hardware remove...\n"); |
| spin_lock_irqsave(&data->lock, flags); |
| data->status |= PICOLCD_FAILED; |
| spin_unlock_irqrestore(&data->lock, flags); |
| |
| picolcd_exit_devfs(data); |
| device_remove_file(&hdev->dev, &dev_attr_operation_mode); |
| device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay); |
| hdev->ll_driver->close(hdev); |
| hid_hw_stop(hdev); |
| hid_set_drvdata(hdev, NULL); |
| |
| /* Shortcut potential pending reply that will never arrive */ |
| spin_lock_irqsave(&data->lock, flags); |
| if (data->pending) |
| complete(&data->pending->ready); |
| spin_unlock_irqrestore(&data->lock, flags); |
| |
| /* Cleanup LED */ |
| picolcd_exit_leds(data); |
| /* Clean up the framebuffer */ |
| picolcd_exit_backlight(data); |
| picolcd_exit_lcd(data); |
| picolcd_exit_framebuffer(data); |
| /* Cleanup input */ |
| picolcd_exit_cir(data); |
| picolcd_exit_keys(data); |
| |
| mutex_destroy(&data->mutex); |
| /* Finally, clean up the picolcd data itself */ |
| kfree(data); |
| } |
| |
| static const struct hid_device_id picolcd_devices[] = { |
| { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD) }, |
| { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD_BOOTLOADER) }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(hid, picolcd_devices); |
| |
| static struct hid_driver picolcd_driver = { |
| .name = "hid-picolcd", |
| .id_table = picolcd_devices, |
| .probe = picolcd_probe, |
| .remove = picolcd_remove, |
| .raw_event = picolcd_raw_event, |
| #ifdef CONFIG_PM |
| .suspend = picolcd_suspend, |
| .resume = picolcd_resume, |
| .reset_resume = picolcd_reset_resume, |
| #endif |
| }; |
| |
| static int __init picolcd_init(void) |
| { |
| return hid_register_driver(&picolcd_driver); |
| } |
| |
| static void __exit picolcd_exit(void) |
| { |
| hid_unregister_driver(&picolcd_driver); |
| } |
| |
| module_init(picolcd_init); |
| module_exit(picolcd_exit); |
| MODULE_DESCRIPTION("Minibox graphics PicoLCD Driver"); |
| MODULE_LICENSE("GPL v2"); |