^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Filename: cfag12864bfb.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Version: 0.1.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Description: cfag12864b LCD framebuffer driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Depends: cfag12864b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Author: Copyright (C) Miguel Ojeda Sandonis
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Date: 2006-10-31
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/fb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/cfag12864b.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define CFAG12864BFB_NAME "cfag12864bfb"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static const struct fb_fix_screeninfo cfag12864bfb_fix = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) .id = "cfag12864b",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) .type = FB_TYPE_PACKED_PIXELS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) .visual = FB_VISUAL_MONO10,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) .xpanstep = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) .ypanstep = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) .ywrapstep = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) .line_length = CFAG12864B_WIDTH / 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .accel = FB_ACCEL_NONE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static const struct fb_var_screeninfo cfag12864bfb_var = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .xres = CFAG12864B_WIDTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .yres = CFAG12864B_HEIGHT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .xres_virtual = CFAG12864B_WIDTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .yres_virtual = CFAG12864B_HEIGHT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) .bits_per_pixel = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) .red = { 0, 1, 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) .green = { 0, 1, 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) .blue = { 0, 1, 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) .left_margin = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) .right_margin = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) .upper_margin = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) .lower_margin = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) .vmode = FB_VMODE_NONINTERLACED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static int cfag12864bfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct page *pages = virt_to_page(cfag12864b_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return vm_map_pages_zero(vma, &pages, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static const struct fb_ops cfag12864bfb_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) .fb_read = fb_sys_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) .fb_write = fb_sys_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) .fb_fillrect = sys_fillrect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) .fb_copyarea = sys_copyarea,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) .fb_imageblit = sys_imageblit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) .fb_mmap = cfag12864bfb_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static int cfag12864bfb_probe(struct platform_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) int ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct fb_info *info = framebuffer_alloc(0, &device->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) goto none;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) info->screen_base = (char __iomem *) cfag12864b_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) info->screen_size = CFAG12864B_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) info->fbops = &cfag12864bfb_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) info->fix = cfag12864bfb_fix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) info->var = cfag12864bfb_var;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) info->pseudo_palette = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) info->par = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) info->flags = FBINFO_FLAG_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (register_framebuffer(info) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) goto fballoced;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) platform_set_drvdata(device, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) fb_info(info, "%s frame buffer device\n", info->fix.id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) fballoced:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) framebuffer_release(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) none:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static int cfag12864bfb_remove(struct platform_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct fb_info *info = platform_get_drvdata(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) unregister_framebuffer(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) framebuffer_release(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static struct platform_driver cfag12864bfb_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) .probe = cfag12864bfb_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) .remove = cfag12864bfb_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) .name = CFAG12864BFB_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static struct platform_device *cfag12864bfb_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static int __init cfag12864bfb_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) int ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) /* cfag12864b_init() must be called first */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (!cfag12864b_isinited()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) "cfag12864b is not initialized\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) goto none;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (cfag12864b_enable()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) "can't enable cfag12864b refreshing (being used)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) ret = platform_driver_register(&cfag12864bfb_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) cfag12864bfb_device =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) platform_device_alloc(CFAG12864BFB_NAME, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (cfag12864bfb_device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) ret = platform_device_add(cfag12864bfb_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) platform_device_put(cfag12864bfb_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) platform_driver_unregister(&cfag12864bfb_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) none:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static void __exit cfag12864bfb_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) platform_device_unregister(cfag12864bfb_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) platform_driver_unregister(&cfag12864bfb_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) cfag12864b_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) module_init(cfag12864bfb_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) module_exit(cfag12864bfb_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) MODULE_AUTHOR("Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) MODULE_DESCRIPTION("cfag12864b LCD framebuffer driver");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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