| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Steve Glendinning | 8901 | 94.40% | 3 | 9.68% |
| Thomas Zimmermann | 196 | 2.08% | 7 | 22.58% |
| Hyunwoo Kim | 133 | 1.41% | 2 | 6.45% |
| Dongliang Mu | 112 | 1.19% | 1 | 3.23% |
| SF Markus Elfring | 17 | 0.18% | 3 | 9.68% |
| Andrew Morton | 17 | 0.18% | 1 | 3.23% |
| Tomi Valkeinen | 10 | 0.11% | 1 | 3.23% |
| Johan Hovold | 9 | 0.10% | 1 | 3.23% |
| Wang Hai | 8 | 0.08% | 1 | 3.23% |
| Dan Carpenter | 7 | 0.07% | 1 | 3.23% |
| Ilya Yanok | 6 | 0.06% | 1 | 3.23% |
| Thomas Gleixner | 2 | 0.02% | 1 | 3.23% |
| Masanari Iida | 2 | 0.02% | 1 | 3.23% |
| Greg Kroah-Hartman | 2 | 0.02% | 1 | 3.23% |
| Rusty Russell | 2 | 0.02% | 1 | 3.23% |
| Sachin Kamat | 1 | 0.01% | 1 | 3.23% |
| Jani Nikula | 1 | 0.01% | 1 | 3.23% |
| H Hartley Sweeten | 1 | 0.01% | 1 | 3.23% |
| Arvind Yadav | 1 | 0.01% | 1 | 3.23% |
| Heiko Stübner | 1 | 0.01% | 1 | 3.23% |
| Total | 9429 | 31 |
// SPDX-License-Identifier: GPL-2.0-only /* * smscufx.c -- Framebuffer driver for SMSC UFX USB controller * * Copyright (C) 2011 Steve Glendinning <steve.glendinning@shawell.net> * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it> * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com> * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com> * * Based on udlfb, with work from Florian Echtler, Henrik Bjerregaard Pedersen, * and others. * * Works well with Bernie Thompson's X DAMAGE patch to xf86-video-fbdev * available from http://git.plugable.com * * Layout is based on skeletonfb by James Simmons and Geert Uytterhoeven, * usb-skeleton by GregKH. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/usb.h> #include <linux/uaccess.h> #include <linux/mm.h> #include <linux/fb.h> #include <linux/vmalloc.h> #include <linux/slab.h> #include <linux/delay.h> #include "edid.h" #define check_warn(status, fmt, args...) \ ({ if (status < 0) pr_warn(fmt, ##args); }) #define check_warn_return(status, fmt, args...) \ ({ if (status < 0) { pr_warn(fmt, ##args); return status; } }) #define check_warn_goto_error(status, fmt, args...) \ ({ if (status < 0) { pr_warn(fmt, ##args); goto error; } }) #define all_bits_set(x, bits) (((x) & (bits)) == (bits)) #define USB_VENDOR_REQUEST_WRITE_REGISTER 0xA0 #define USB_VENDOR_REQUEST_READ_REGISTER 0xA1 /* * TODO: Propose standard fb.h ioctl for reporting damage, * using _IOWR() and one of the existing area structs from fb.h * Consider these ioctls deprecated, but they're still used by the * DisplayLink X server as yet - need both to be modified in tandem * when new ioctl(s) are ready. */ #define UFX_IOCTL_RETURN_EDID (0xAD) #define UFX_IOCTL_REPORT_DAMAGE (0xAA) /* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */ #define BULK_SIZE (512) #define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE) #define WRITES_IN_FLIGHT (4) #define GET_URB_TIMEOUT (HZ) #define FREE_URB_TIMEOUT (HZ*2) #define BPP 2 #define UFX_DEFIO_WRITE_DELAY 5 /* fb_deferred_io.delay in jiffies */ #define UFX_DEFIO_WRITE_DISABLE (HZ*60) /* "disable" with long delay */ struct dloarea { int x, y; int w, h; }; struct urb_node { struct list_head entry; struct ufx_data *dev; struct delayed_work release_urb_work; struct urb *urb; }; struct urb_list { struct list_head list; spinlock_t lock; struct semaphore limit_sem; int available; int count; size_t size; }; struct ufx_data { struct usb_device *udev; struct device *gdev; /* &udev->dev */ struct fb_info *info; struct urb_list urbs; struct kref kref; int fb_count; bool virtualized; /* true when physical usb device not present */ atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */ atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */ u8 *edid; /* null until we read edid from hw or get from sysfs */ size_t edid_size; u32 pseudo_palette[256]; }; static struct fb_fix_screeninfo ufx_fix = { .id = "smscufx", .type = FB_TYPE_PACKED_PIXELS, .visual = FB_VISUAL_TRUECOLOR, .xpanstep = 0, .ypanstep = 0, .ywrapstep = 0, .accel = FB_ACCEL_NONE, }; static const u32 smscufx_info_flags = FBINFO_READS_FAST | FBINFO_VIRTFB | FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA | FBINFO_MISC_ALWAYS_SETPAR; static const struct usb_device_id id_table[] = { {USB_DEVICE(0x0424, 0x9d00),}, {USB_DEVICE(0x0424, 0x9d01),}, {}, }; MODULE_DEVICE_TABLE(usb, id_table); /* module options */ static bool console; /* Optionally allow fbcon to consume first framebuffer */ static bool fb_defio = true; /* Optionally enable fb_defio mmap support */ /* ufx keeps a list of urbs for efficient bulk transfers */ static void ufx_urb_completion(struct urb *urb); static struct urb *ufx_get_urb(struct ufx_data *dev); static int ufx_submit_urb(struct ufx_data *dev, struct urb * urb, size_t len); static int ufx_alloc_urb_list(struct ufx_data *dev, int count, size_t size); static void ufx_free_urb_list(struct ufx_data *dev); static DEFINE_MUTEX(disconnect_mutex); /* reads a control register */ static int ufx_reg_read(struct ufx_data *dev, u32 index, u32 *data) { u32 *buf = kmalloc(4, GFP_KERNEL); int ret; BUG_ON(!dev); if (!buf) return -ENOMEM; ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 00, index, buf, 4, USB_CTRL_GET_TIMEOUT); le32_to_cpus(buf); *data = *buf; kfree(buf); if (unlikely(ret < 0)) pr_warn("Failed to read register index 0x%08x\n", index); return ret; } /* writes a control register */ static int ufx_reg_write(struct ufx_data *dev, u32 index, u32 data) { u32 *buf = kmalloc(4, GFP_KERNEL); int ret; BUG_ON(!dev); if (!buf) return -ENOMEM; *buf = data; cpu_to_le32s(buf); ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 00, index, buf, 4, USB_CTRL_SET_TIMEOUT); kfree(buf); if (unlikely(ret < 0)) pr_warn("Failed to write register index 0x%08x with value " "0x%08x\n", index, data); return ret; } static int ufx_reg_clear_and_set_bits(struct ufx_data *dev, u32 index, u32 bits_to_clear, u32 bits_to_set) { u32 data; int status = ufx_reg_read(dev, index, &data); check_warn_return(status, "ufx_reg_clear_and_set_bits error reading " "0x%x", index); data &= (~bits_to_clear); data |= bits_to_set; status = ufx_reg_write(dev, index, data); check_warn_return(status, "ufx_reg_clear_and_set_bits error writing " "0x%x", index); return 0; } static int ufx_reg_set_bits(struct ufx_data *dev, u32 index, u32 bits) { return ufx_reg_clear_and_set_bits(dev, index, 0, bits); } static int ufx_reg_clear_bits(struct ufx_data *dev, u32 index, u32 bits) { return ufx_reg_clear_and_set_bits(dev, index, bits, 0); } static int ufx_lite_reset(struct ufx_data *dev) { int status; u32 value; status = ufx_reg_write(dev, 0x3008, 0x00000001); check_warn_return(status, "ufx_lite_reset error writing 0x3008"); status = ufx_reg_read(dev, 0x3008, &value); check_warn_return(status, "ufx_lite_reset error reading 0x3008"); return (value == 0) ? 0 : -EIO; } /* If display is unblanked, then blank it */ static int ufx_blank(struct ufx_data *dev, bool wait) { u32 dc_ctrl, dc_sts; int i; int status = ufx_reg_read(dev, 0x2004, &dc_sts); check_warn_return(status, "ufx_blank error reading 0x2004"); status = ufx_reg_read(dev, 0x2000, &dc_ctrl); check_warn_return(status, "ufx_blank error reading 0x2000"); /* return success if display is already blanked */ if ((dc_sts & 0x00000100) || (dc_ctrl & 0x00000100)) return 0; /* request the DC to blank the display */ dc_ctrl |= 0x00000100; status = ufx_reg_write(dev, 0x2000, dc_ctrl); check_warn_return(status, "ufx_blank error writing 0x2000"); /* return success immediately if we don't have to wait */ if (!wait) return 0; for (i = 0; i < 250; i++) { status = ufx_reg_read(dev, 0x2004, &dc_sts); check_warn_return(status, "ufx_blank error reading 0x2004"); if (dc_sts & 0x00000100) return 0; } /* timed out waiting for display to blank */ return -EIO; } /* If display is blanked, then unblank it */ static int ufx_unblank(struct ufx_data *dev, bool wait) { u32 dc_ctrl, dc_sts; int i; int status = ufx_reg_read(dev, 0x2004, &dc_sts); check_warn_return(status, "ufx_unblank error reading 0x2004"); status = ufx_reg_read(dev, 0x2000, &dc_ctrl); check_warn_return(status, "ufx_unblank error reading 0x2000"); /* return success if display is already unblanked */ if (((dc_sts & 0x00000100) == 0) || ((dc_ctrl & 0x00000100) == 0)) return 0; /* request the DC to unblank the display */ dc_ctrl &= ~0x00000100; status = ufx_reg_write(dev, 0x2000, dc_ctrl); check_warn_return(status, "ufx_unblank error writing 0x2000"); /* return success immediately if we don't have to wait */ if (!wait) return 0; for (i = 0; i < 250; i++) { status = ufx_reg_read(dev, 0x2004, &dc_sts); check_warn_return(status, "ufx_unblank error reading 0x2004"); if ((dc_sts & 0x00000100) == 0) return 0; } /* timed out waiting for display to unblank */ return -EIO; } /* If display is enabled, then disable it */ static int ufx_disable(struct ufx_data *dev, bool wait) { u32 dc_ctrl, dc_sts; int i; int status = ufx_reg_read(dev, 0x2004, &dc_sts); check_warn_return(status, "ufx_disable error reading 0x2004"); status = ufx_reg_read(dev, 0x2000, &dc_ctrl); check_warn_return(status, "ufx_disable error reading 0x2000"); /* return success if display is already disabled */ if (((dc_sts & 0x00000001) == 0) || ((dc_ctrl & 0x00000001) == 0)) return 0; /* request the DC to disable the display */ dc_ctrl &= ~(0x00000001); status = ufx_reg_write(dev, 0x2000, dc_ctrl); check_warn_return(status, "ufx_disable error writing 0x2000"); /* return success immediately if we don't have to wait */ if (!wait) return 0; for (i = 0; i < 250; i++) { status = ufx_reg_read(dev, 0x2004, &dc_sts); check_warn_return(status, "ufx_disable error reading 0x2004"); if ((dc_sts & 0x00000001) == 0) return 0; } /* timed out waiting for display to disable */ return -EIO; } /* If display is disabled, then enable it */ static int ufx_enable(struct ufx_data *dev, bool wait) { u32 dc_ctrl, dc_sts; int i; int status = ufx_reg_read(dev, 0x2004, &dc_sts); check_warn_return(status, "ufx_enable error reading 0x2004"); status = ufx_reg_read(dev, 0x2000, &dc_ctrl); check_warn_return(status, "ufx_enable error reading 0x2000"); /* return success if display is already enabled */ if ((dc_sts & 0x00000001) || (dc_ctrl & 0x00000001)) return 0; /* request the DC to enable the display */ dc_ctrl |= 0x00000001; status = ufx_reg_write(dev, 0x2000, dc_ctrl); check_warn_return(status, "ufx_enable error writing 0x2000"); /* return success immediately if we don't have to wait */ if (!wait) return 0; for (i = 0; i < 250; i++) { status = ufx_reg_read(dev, 0x2004, &dc_sts); check_warn_return(status, "ufx_enable error reading 0x2004"); if (dc_sts & 0x00000001) return 0; } /* timed out waiting for display to enable */ return -EIO; } static int ufx_config_sys_clk(struct ufx_data *dev) { int status = ufx_reg_write(dev, 0x700C, 0x8000000F); check_warn_return(status, "error writing 0x700C"); status = ufx_reg_write(dev, 0x7014, 0x0010024F); check_warn_return(status, "error writing 0x7014"); status = ufx_reg_write(dev, 0x7010, 0x00000000); check_warn_return(status, "error writing 0x7010"); status = ufx_reg_clear_bits(dev, 0x700C, 0x0000000A); check_warn_return(status, "error clearing PLL1 bypass in 0x700C"); msleep(1); status = ufx_reg_clear_bits(dev, 0x700C, 0x80000000); check_warn_return(status, "error clearing output gate in 0x700C"); return 0; } static int ufx_config_ddr2(struct ufx_data *dev) { int status, i = 0; u32 tmp; status = ufx_reg_write(dev, 0x0004, 0x001F0F77); check_warn_return(status, "error writing 0x0004"); status = ufx_reg_write(dev, 0x0008, 0xFFF00000); check_warn_return(status, "error writing 0x0008"); status = ufx_reg_write(dev, 0x000C, 0x0FFF2222); check_warn_return(status, "error writing 0x000C"); status = ufx_reg_write(dev, 0x0010, 0x00030814); check_warn_return(status, "error writing 0x0010"); status = ufx_reg_write(dev, 0x0014, 0x00500019); check_warn_return(status, "error writing 0x0014"); status = ufx_reg_write(dev, 0x0018, 0x020D0F15); check_warn_return(status, "error writing 0x0018"); status = ufx_reg_write(dev, 0x001C, 0x02532305); check_warn_return(status, "error writing 0x001C"); status = ufx_reg_write(dev, 0x0020, 0x0B030905); check_warn_return(status, "error writing 0x0020"); status = ufx_reg_write(dev, 0x0024, 0x00000827); check_warn_return(status, "error writing 0x0024"); status = ufx_reg_write(dev, 0x0028, 0x00000000); check_warn_return(status, "error writing 0x0028"); status = ufx_reg_write(dev, 0x002C, 0x00000042); check_warn_return(status, "error writing 0x002C"); status = ufx_reg_write(dev, 0x0030, 0x09520000); check_warn_return(status, "error writing 0x0030"); status = ufx_reg_write(dev, 0x0034, 0x02223314); check_warn_return(status, "error writing 0x0034"); status = ufx_reg_write(dev, 0x0038, 0x00430043); check_warn_return(status, "error writing 0x0038"); status = ufx_reg_write(dev, 0x003C, 0xF00F000F); check_warn_return(status, "error writing 0x003C"); status = ufx_reg_write(dev, 0x0040, 0xF380F00F); check_warn_return(status, "error writing 0x0040"); status = ufx_reg_write(dev, 0x0044, 0xF00F0496); check_warn_return(status, "error writing 0x0044"); status = ufx_reg_write(dev, 0x0048, 0x03080406); check_warn_return(status, "error writing 0x0048"); status = ufx_reg_write(dev, 0x004C, 0x00001000); check_warn_return(status, "error writing 0x004C"); status = ufx_reg_write(dev, 0x005C, 0x00000007); check_warn_return(status, "error writing 0x005C"); status = ufx_reg_write(dev, 0x0100, 0x54F00012); check_warn_return(status, "error writing 0x0100"); status = ufx_reg_write(dev, 0x0104, 0x00004012); check_warn_return(status, "error writing 0x0104"); status = ufx_reg_write(dev, 0x0118, 0x40404040); check_warn_return(status, "error writing 0x0118"); status = ufx_reg_write(dev, 0x0000, 0x00000001); check_warn_return(status, "error writing 0x0000"); while (i++ < 500) { status = ufx_reg_read(dev, 0x0000, &tmp); check_warn_return(status, "error reading 0x0000"); if (all_bits_set(tmp, 0xC0000000)) return 0; } pr_err("DDR2 initialisation timed out, reg 0x0000=0x%08x", tmp); return -ETIMEDOUT; } struct pll_values { u32 div_r0; u32 div_f0; u32 div_q0; u32 range0; u32 div_r1; u32 div_f1; u32 div_q1; u32 range1; }; static u32 ufx_calc_range(u32 ref_freq) { if (ref_freq >= 88000000) return 7; if (ref_freq >= 54000000) return 6; if (ref_freq >= 34000000) return 5; if (ref_freq >= 21000000) return 4; if (ref_freq >= 13000000) return 3; if (ref_freq >= 8000000) return 2; return 1; } /* calculates PLL divider settings for a desired target frequency */ static void ufx_calc_pll_values(const u32 clk_pixel_pll, struct pll_values *asic_pll) { const u32 ref_clk = 25000000; u32 div_r0, div_f0, div_q0, div_r1, div_f1, div_q1; u32 min_error = clk_pixel_pll; for (div_r0 = 1; div_r0 <= 32; div_r0++) { u32 ref_freq0 = ref_clk / div_r0; if (ref_freq0 < 5000000) break; if (ref_freq0 > 200000000) continue; for (div_f0 = 1; div_f0 <= 256; div_f0++) { u32 vco_freq0 = ref_freq0 * div_f0; if (vco_freq0 < 350000000) continue; if (vco_freq0 > 700000000) break; for (div_q0 = 0; div_q0 < 7; div_q0++) { u32 pllout_freq0 = vco_freq0 / (1 << div_q0); if (pllout_freq0 < 5000000) break; if (pllout_freq0 > 200000000) continue; for (div_r1 = 1; div_r1 <= 32; div_r1++) { u32 ref_freq1 = pllout_freq0 / div_r1; if (ref_freq1 < 5000000) break; for (div_f1 = 1; div_f1 <= 256; div_f1++) { u32 vco_freq1 = ref_freq1 * div_f1; if (vco_freq1 < 350000000) continue; if (vco_freq1 > 700000000) break; for (div_q1 = 0; div_q1 < 7; div_q1++) { u32 pllout_freq1 = vco_freq1 / (1 << div_q1); int error = abs(pllout_freq1 - clk_pixel_pll); if (pllout_freq1 < 5000000) break; if (pllout_freq1 > 700000000) continue; if (error < min_error) { min_error = error; /* final returned value is equal to calculated value - 1 * because a value of 0 = divide by 1 */ asic_pll->div_r0 = div_r0 - 1; asic_pll->div_f0 = div_f0 - 1; asic_pll->div_q0 = div_q0; asic_pll->div_r1 = div_r1 - 1; asic_pll->div_f1 = div_f1 - 1; asic_pll->div_q1 = div_q1; asic_pll->range0 = ufx_calc_range(ref_freq0); asic_pll->range1 = ufx_calc_range(ref_freq1); if (min_error == 0) return; } } } } } } } } /* sets analog bit PLL configuration values */ static int ufx_config_pix_clk(struct ufx_data *dev, u32 pixclock) { struct pll_values asic_pll = {0}; u32 value, clk_pixel, clk_pixel_pll; int status; /* convert pixclock (in ps) to frequency (in Hz) */ clk_pixel = PICOS2KHZ(pixclock) * 1000; pr_debug("pixclock %d ps = clk_pixel %d Hz", pixclock, clk_pixel); /* clk_pixel = 1/2 clk_pixel_pll */ clk_pixel_pll = clk_pixel * 2; ufx_calc_pll_values(clk_pixel_pll, &asic_pll); /* Keep BYPASS and RESET signals asserted until configured */ status = ufx_reg_write(dev, 0x7000, 0x8000000F); check_warn_return(status, "error writing 0x7000"); value = (asic_pll.div_f1 | (asic_pll.div_r1 << 8) | (asic_pll.div_q1 << 16) | (asic_pll.range1 << 20)); status = ufx_reg_write(dev, 0x7008, value); check_warn_return(status, "error writing 0x7008"); value = (asic_pll.div_f0 | (asic_pll.div_r0 << 8) | (asic_pll.div_q0 << 16) | (asic_pll.range0 << 20)); status = ufx_reg_write(dev, 0x7004, value); check_warn_return(status, "error writing 0x7004"); status = ufx_reg_clear_bits(dev, 0x7000, 0x00000005); check_warn_return(status, "error clearing PLL0 bypass bits in 0x7000"); msleep(1); status = ufx_reg_clear_bits(dev, 0x7000, 0x0000000A); check_warn_return(status, "error clearing PLL1 bypass bits in 0x7000"); msleep(1); status = ufx_reg_clear_bits(dev, 0x7000, 0x80000000); check_warn_return(status, "error clearing gate bits in 0x7000"); return 0; } static int ufx_set_vid_mode(struct ufx_data *dev, struct fb_var_screeninfo *var) { u32 temp; u16 h_total, h_active, h_blank_start, h_blank_end, h_sync_start, h_sync_end; u16 v_total, v_active, v_blank_start, v_blank_end, v_sync_start, v_sync_end; int status = ufx_reg_write(dev, 0x8028, 0); check_warn_return(status, "ufx_set_vid_mode error disabling RGB pad"); status = ufx_reg_write(dev, 0x8024, 0); check_warn_return(status, "ufx_set_vid_mode error disabling VDAC"); /* shut everything down before changing timing */ status = ufx_blank(dev, true); check_warn_return(status, "ufx_set_vid_mode error blanking display"); status = ufx_disable(dev, true); check_warn_return(status, "ufx_set_vid_mode error disabling display"); status = ufx_config_pix_clk(dev, var->pixclock); check_warn_return(status, "ufx_set_vid_mode error configuring pixclock"); status = ufx_reg_write(dev, 0x2000, 0x00000104); check_warn_return(status, "ufx_set_vid_mode error writing 0x2000"); /* set horizontal timings */ h_total = var->xres + var->right_margin + var->hsync_len + var->left_margin; h_active = var->xres; h_blank_start = var->xres + var->right_margin; h_blank_end = var->xres + var->right_margin + var->hsync_len; h_sync_start = var->xres + var->right_margin; h_sync_end = var->xres + var->right_margin + var->hsync_len; temp = ((h_total - 1) << 16) | (h_active - 1); status = ufx_reg_write(dev, 0x2008, temp); check_warn_return(status, "ufx_set_vid_mode error writing 0x2008"); temp = ((h_blank_start - 1) << 16) | (h_blank_end - 1); status = ufx_reg_write(dev, 0x200C, temp); check_warn_return(status, "ufx_set_vid_mode error writing 0x200C"); temp = ((h_sync_start - 1) << 16) | (h_sync_end - 1); status = ufx_reg_write(dev, 0x2010, temp); check_warn_return(status, "ufx_set_vid_mode error writing 0x2010"); /* set vertical timings */ v_total = var->upper_margin + var->yres + var->lower_margin + var->vsync_len; v_active = var->yres; v_blank_start = var->yres + var->lower_margin; v_blank_end = var->yres + var->lower_margin + var->vsync_len; v_sync_start = var->yres + var->lower_margin; v_sync_end = var->yres + var->lower_margin + var->vsync_len; temp = ((v_total - 1) << 16) | (v_active - 1); status = ufx_reg_write(dev, 0x2014, temp); check_warn_return(status, "ufx_set_vid_mode error writing 0x2014"); temp = ((v_blank_start - 1) << 16) | (v_blank_end - 1); status = ufx_reg_write(dev, 0x2018, temp); check_warn_return(status, "ufx_set_vid_mode error writing 0x2018"); temp = ((v_sync_start - 1) << 16) | (v_sync_end - 1); status = ufx_reg_write(dev, 0x201C, temp); check_warn_return(status, "ufx_set_vid_mode error writing 0x201C"); status = ufx_reg_write(dev, 0x2020, 0x00000000); check_warn_return(status, "ufx_set_vid_mode error writing 0x2020"); status = ufx_reg_write(dev, 0x2024, 0x00000000); check_warn_return(status, "ufx_set_vid_mode error writing 0x2024"); /* Set the frame length register (#pix * 2 bytes/pixel) */ temp = var->xres * var->yres * 2; temp = (temp + 7) & (~0x7); status = ufx_reg_write(dev, 0x2028, temp); check_warn_return(status, "ufx_set_vid_mode error writing 0x2028"); /* enable desired output interface & disable others */ status = ufx_reg_write(dev, 0x2040, 0); check_warn_return(status, "ufx_set_vid_mode error writing 0x2040"); status = ufx_reg_write(dev, 0x2044, 0); check_warn_return(status, "ufx_set_vid_mode error writing 0x2044"); status = ufx_reg_write(dev, 0x2048, 0); check_warn_return(status, "ufx_set_vid_mode error writing 0x2048"); /* set the sync polarities & enable bit */ temp = 0x00000001; if (var->sync & FB_SYNC_HOR_HIGH_ACT) temp |= 0x00000010; if (var->sync & FB_SYNC_VERT_HIGH_ACT) temp |= 0x00000008; status = ufx_reg_write(dev, 0x2040, temp); check_warn_return(status, "ufx_set_vid_mode error writing 0x2040"); /* start everything back up */ status = ufx_enable(dev, true); check_warn_return(status, "ufx_set_vid_mode error enabling display"); /* Unblank the display */ status = ufx_unblank(dev, true); check_warn_return(status, "ufx_set_vid_mode error unblanking display"); /* enable RGB pad */ status = ufx_reg_write(dev, 0x8028, 0x00000003); check_warn_return(status, "ufx_set_vid_mode error enabling RGB pad"); /* enable VDAC */ status = ufx_reg_write(dev, 0x8024, 0x00000007); check_warn_return(status, "ufx_set_vid_mode error enabling VDAC"); return 0; } static int ufx_ops_mmap(struct fb_info *info, struct vm_area_struct *vma) { unsigned long start = vma->vm_start; unsigned long size = vma->vm_end - vma->vm_start; unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; unsigned long page, pos; if (info->fbdefio) return fb_deferred_io_mmap(info, vma); if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) return -EINVAL; if (size > info->fix.smem_len) return -EINVAL; if (offset > info->fix.smem_len - size) return -EINVAL; pos = (unsigned long)info->fix.smem_start + offset; pr_debug("mmap() framebuffer addr:%lu size:%lu\n", pos, size); while (size > 0) { page = vmalloc_to_pfn((void *)pos); if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) return -EAGAIN; start += PAGE_SIZE; pos += PAGE_SIZE; if (size > PAGE_SIZE) size -= PAGE_SIZE; else size = 0; } return 0; } static void ufx_raw_rect(struct ufx_data *dev, u16 *cmd, int x, int y, int width, int height) { size_t packed_line_len = ALIGN((width * 2), 4); size_t packed_rect_len = packed_line_len * height; int line; BUG_ON(!dev); BUG_ON(!dev->info); /* command word */ *((u32 *)&cmd[0]) = cpu_to_le32(0x01); /* length word */ *((u32 *)&cmd[2]) = cpu_to_le32(packed_rect_len + 16); cmd[4] = cpu_to_le16(x); cmd[5] = cpu_to_le16(y); cmd[6] = cpu_to_le16(width); cmd[7] = cpu_to_le16(height); /* frame base address */ *((u32 *)&cmd[8]) = cpu_to_le32(0); /* color mode and horizontal resolution */ cmd[10] = cpu_to_le16(0x4000 | dev->info->var.xres); /* vertical resolution */ cmd[11] = cpu_to_le16(dev->info->var.yres); /* packed data */ for (line = 0; line < height; line++) { const int line_offset = dev->info->fix.line_length * (y + line); const int byte_offset = line_offset + (x * BPP); memcpy(&cmd[(24 + (packed_line_len * line)) / 2], (char *)dev->info->fix.smem_start + byte_offset, width * BPP); } } static int ufx_handle_damage(struct ufx_data *dev, int x, int y, int width, int height) { size_t packed_line_len = ALIGN((width * 2), 4); int len, status, urb_lines, start_line = 0; if ((width <= 0) || (height <= 0) || (x + width > dev->info->var.xres) || (y + height > dev->info->var.yres)) return -EINVAL; if (!atomic_read(&dev->usb_active)) return 0; while (start_line < height) { struct urb *urb = ufx_get_urb(dev); if (!urb) { pr_warn("ufx_handle_damage unable to get urb"); return 0; } /* assume we have enough space to transfer at least one line */ BUG_ON(urb->transfer_buffer_length < (24 + (width * 2))); /* calculate the maximum number of lines we could fit in */ urb_lines = (urb->transfer_buffer_length - 24) / packed_line_len; /* but we might not need this many */ urb_lines = min(urb_lines, (height - start_line)); memset(urb->transfer_buffer, 0, urb->transfer_buffer_length); ufx_raw_rect(dev, urb->transfer_buffer, x, (y + start_line), width, urb_lines); len = 24 + (packed_line_len * urb_lines); status = ufx_submit_urb(dev, urb, len); check_warn_return(status, "Error submitting URB"); start_line += urb_lines; } return 0; } /* NOTE: fb_defio.c is holding info->fbdefio.mutex * Touching ANY framebuffer memory that triggers a page fault * in fb_defio will cause a deadlock, when it also tries to * grab the same mutex. */ static void ufx_dpy_deferred_io(struct fb_info *info, struct list_head *pagereflist) { struct ufx_data *dev = info->par; struct fb_deferred_io_pageref *pageref; if (!fb_defio) return; if (!atomic_read(&dev->usb_active)) return; /* walk the written page list and render each to device */ list_for_each_entry(pageref, pagereflist, list) { /* create a rectangle of full screen width that encloses the * entire dirty framebuffer page */ const int x = 0; const int width = dev->info->var.xres; const int y = pageref->offset / (width * 2); int height = (PAGE_SIZE / (width * 2)) + 1; height = min(height, (int)(dev->info->var.yres - y)); BUG_ON(y >= dev->info->var.yres); BUG_ON((y + height) > dev->info->var.yres); ufx_handle_damage(dev, x, y, width, height); } } static int ufx_ops_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) { struct ufx_data *dev = info->par; struct dloarea *area = NULL; if (!atomic_read(&dev->usb_active)) return 0; /* TODO: Update X server to get this from sysfs instead */ if (cmd == UFX_IOCTL_RETURN_EDID) { u8 __user *edid = (u8 __user *)arg; if (copy_to_user(edid, dev->edid, dev->edid_size)) return -EFAULT; return 0; } /* TODO: Help propose a standard fb.h ioctl to report mmap damage */ if (cmd == UFX_IOCTL_REPORT_DAMAGE) { /* If we have a damage-aware client, turn fb_defio "off" * To avoid perf imact of unnecessary page fault handling. * Done by resetting the delay for this fb_info to a very * long period. Pages will become writable and stay that way. * Reset to normal value when all clients have closed this fb. */ if (info->fbdefio) info->fbdefio->delay = UFX_DEFIO_WRITE_DISABLE; area = (struct dloarea *)arg; if (area->x < 0) area->x = 0; if (area->x > info->var.xres) area->x = info->var.xres; if (area->y < 0) area->y = 0; if (area->y > info->var.yres) area->y = info->var.yres; ufx_handle_damage(dev, area->x, area->y, area->w, area->h); } return 0; } /* taken from vesafb */ static int ufx_ops_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info) { int err = 0; if (regno >= info->cmap.len) return 1; if (regno < 16) { if (info->var.red.offset == 10) { /* 1:5:5:5 */ ((u32 *) (info->pseudo_palette))[regno] = ((red & 0xf800) >> 1) | ((green & 0xf800) >> 6) | ((blue & 0xf800) >> 11); } else { /* 0:5:6:5 */ ((u32 *) (info->pseudo_palette))[regno] = ((red & 0xf800)) | ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11); } } return err; } /* It's common for several clients to have framebuffer open simultaneously. * e.g. both fbcon and X. Makes things interesting. * Assumes caller is holding info->lock (for open and release at least) */ static int ufx_ops_open(struct fb_info *info, int user) { struct ufx_data *dev = info->par; /* fbcon aggressively connects to first framebuffer it finds, * preventing other clients (X) from working properly. Usually * not what the user wants. Fail by default with option to enable. */ if (user == 0 && !console) return -EBUSY; mutex_lock(&disconnect_mutex); /* If the USB device is gone, we don't accept new opens */ if (dev->virtualized) { mutex_unlock(&disconnect_mutex); return -ENODEV; } dev->fb_count++; kref_get(&dev->kref); if (fb_defio && (info->fbdefio == NULL)) { /* enable defio at last moment if not disabled by client */ struct fb_deferred_io *fbdefio; fbdefio = kzalloc(sizeof(*fbdefio), GFP_KERNEL); if (fbdefio) { fbdefio->delay = UFX_DEFIO_WRITE_DELAY; fbdefio->deferred_io = ufx_dpy_deferred_io; } info->fbdefio = fbdefio; fb_deferred_io_init(info); } pr_debug("open /dev/fb%d user=%d fb_info=%p count=%d", info->node, user, info, dev->fb_count); mutex_unlock(&disconnect_mutex); return 0; } /* * Called when all client interfaces to start transactions have been disabled, * and all references to our device instance (ufx_data) are released. * Every transaction must have a reference, so we know are fully spun down */ static void ufx_free(struct kref *kref) { struct ufx_data *dev = container_of(kref, struct ufx_data, kref); kfree(dev); } static void ufx_ops_destory(struct fb_info *info) { struct ufx_data *dev = info->par; int node = info->node; /* Assume info structure is freed after this point */ framebuffer_release(info); pr_debug("fb_info for /dev/fb%d has been freed", node); /* release reference taken by kref_init in probe() */ kref_put(&dev->kref, ufx_free); } static void ufx_release_urb_work(struct work_struct *work) { struct urb_node *unode = container_of(work, struct urb_node, release_urb_work.work); up(&unode->dev->urbs.limit_sem); } static void ufx_free_framebuffer(struct ufx_data *dev) { struct fb_info *info = dev->info; if (info->cmap.len != 0) fb_dealloc_cmap(&info->cmap); if (info->monspecs.modedb) fb_destroy_modedb(info->monspecs.modedb); vfree(info->screen_buffer); fb_destroy_modelist(&info->modelist); dev->info = NULL; /* ref taken in probe() as part of registering framebfufer */ kref_put(&dev->kref, ufx_free); } /* * Assumes caller is holding info->lock mutex (for open and release at least) */ static int ufx_ops_release(struct fb_info *info, int user) { struct ufx_data *dev = info->par; mutex_lock(&disconnect_mutex); dev->fb_count--; /* We can't free fb_info here - fbmem will touch it when we return */ if (dev->virtualized && (dev->fb_count == 0)) ufx_free_framebuffer(dev); if ((dev->fb_count == 0) && (info->fbdefio)) { fb_deferred_io_cleanup(info); kfree(info->fbdefio); info->fbdefio = NULL; } pr_debug("released /dev/fb%d user=%d count=%d", info->node, user, dev->fb_count); kref_put(&dev->kref, ufx_free); mutex_unlock(&disconnect_mutex); return 0; } /* Check whether a video mode is supported by the chip * We start from monitor's modes, so don't need to filter that here */ static int ufx_is_valid_mode(struct fb_videomode *mode, struct fb_info *info) { if ((mode->xres * mode->yres) > (2048 * 1152)) { pr_debug("%dx%d too many pixels", mode->xres, mode->yres); return 0; } if (mode->pixclock < 5000) { pr_debug("%dx%d %dps pixel clock too fast", mode->xres, mode->yres, mode->pixclock); return 0; } pr_debug("%dx%d (pixclk %dps %dMHz) valid mode", mode->xres, mode->yres, mode->pixclock, (1000000 / mode->pixclock)); return 1; } static void ufx_var_color_format(struct fb_var_screeninfo *var) { const struct fb_bitfield red = { 11, 5, 0 }; const struct fb_bitfield green = { 5, 6, 0 }; const struct fb_bitfield blue = { 0, 5, 0 }; var->bits_per_pixel = 16; var->red = red; var->green = green; var->blue = blue; } static int ufx_ops_check_var(struct fb_var_screeninfo *var, struct fb_info *info) { struct fb_videomode mode; /* TODO: support dynamically changing framebuffer size */ if ((var->xres * var->yres * 2) > info->fix.smem_len) return -EINVAL; /* set device-specific elements of var unrelated to mode */ ufx_var_color_format(var); fb_var_to_videomode(&mode, var); if (!ufx_is_valid_mode(&mode, info)) return -EINVAL; return 0; } static int ufx_ops_set_par(struct fb_info *info) { struct ufx_data *dev = info->par; int result; u16 *pix_framebuffer; int i; pr_debug("set_par mode %dx%d", info->var.xres, info->var.yres); result = ufx_set_vid_mode(dev, &info->var); if ((result == 0) && (dev->fb_count == 0)) { /* paint greenscreen */ pix_framebuffer = (u16 *)info->screen_buffer; for (i = 0; i < info->fix.smem_len / 2; i++) pix_framebuffer[i] = 0x37e6; ufx_handle_damage(dev, 0, 0, info->var.xres, info->var.yres); } /* re-enable defio if previously disabled by damage tracking */ if (info->fbdefio) info->fbdefio->delay = UFX_DEFIO_WRITE_DELAY; return result; } /* In order to come back from full DPMS off, we need to set the mode again */ static int ufx_ops_blank(int blank_mode, struct fb_info *info) { struct ufx_data *dev = info->par; ufx_set_vid_mode(dev, &info->var); return 0; } static void ufx_ops_damage_range(struct fb_info *info, off_t off, size_t len) { struct ufx_data *dev = info->par; int start = max((int)(off / info->fix.line_length), 0); int lines = min((u32)((len / info->fix.line_length) + 1), (u32)info->var.yres); ufx_handle_damage(dev, 0, start, info->var.xres, lines); } static void ufx_ops_damage_area(struct fb_info *info, u32 x, u32 y, u32 width, u32 height) { struct ufx_data *dev = info->par; ufx_handle_damage(dev, x, y, width, height); } FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(ufx_ops, ufx_ops_damage_range, ufx_ops_damage_area) static const struct fb_ops ufx_ops = { .owner = THIS_MODULE, __FB_DEFAULT_DEFERRED_OPS_RDWR(ufx_ops), .fb_setcolreg = ufx_ops_setcolreg, __FB_DEFAULT_DEFERRED_OPS_DRAW(ufx_ops), .fb_mmap = ufx_ops_mmap, .fb_ioctl = ufx_ops_ioctl, .fb_open = ufx_ops_open, .fb_release = ufx_ops_release, .fb_blank = ufx_ops_blank, .fb_check_var = ufx_ops_check_var, .fb_set_par = ufx_ops_set_par, .fb_destroy = ufx_ops_destory, }; /* Assumes &info->lock held by caller * Assumes no active clients have framebuffer open */ static int ufx_realloc_framebuffer(struct ufx_data *dev, struct fb_info *info) { int old_len = info->fix.smem_len; int new_len; unsigned char *old_fb = info->screen_buffer; unsigned char *new_fb; pr_debug("Reallocating framebuffer. Addresses will change!"); new_len = info->fix.line_length * info->var.yres; if (PAGE_ALIGN(new_len) > old_len) { /* * Alloc system memory for virtual framebuffer */ new_fb = vmalloc(new_len); if (!new_fb) return -ENOMEM; if (info->screen_buffer) { memcpy(new_fb, old_fb, old_len); vfree(info->screen_buffer); } info->screen_buffer = new_fb; info->fix.smem_len = PAGE_ALIGN(new_len); info->fix.smem_start = (unsigned long) new_fb; info->flags = smscufx_info_flags; } return 0; } /* sets up I2C Controller for 100 Kbps, std. speed, 7-bit addr, master, * restart enabled, but no start byte, enable controller */ static int ufx_i2c_init(struct ufx_data *dev) { u32 tmp; /* disable the controller before it can be reprogrammed */ int status = ufx_reg_write(dev, 0x106C, 0x00); check_warn_return(status, "failed to disable I2C"); /* Setup the clock count registers * (12+1) = 13 clks @ 2.5 MHz = 5.2 uS */ status = ufx_reg_write(dev, 0x1018, 12); check_warn_return(status, "error writing 0x1018"); /* (6+8) = 14 clks @ 2.5 MHz = 5.6 uS */ status = ufx_reg_write(dev, 0x1014, 6); check_warn_return(status, "error writing 0x1014"); status = ufx_reg_read(dev, 0x1000, &tmp); check_warn_return(status, "error reading 0x1000"); /* set speed to std mode */ tmp &= ~(0x06); tmp |= 0x02; /* 7-bit (not 10-bit) addressing */ tmp &= ~(0x10); /* enable restart conditions and master mode */ tmp |= 0x21; status = ufx_reg_write(dev, 0x1000, tmp); check_warn_return(status, "error writing 0x1000"); /* Set normal tx using target address 0 */ status = ufx_reg_clear_and_set_bits(dev, 0x1004, 0xC00, 0x000); check_warn_return(status, "error setting TX mode bits in 0x1004"); /* Enable the controller */ status = ufx_reg_write(dev, 0x106C, 0x01); check_warn_return(status, "failed to enable I2C"); return 0; } /* sets the I2C port mux and target address */ static int ufx_i2c_configure(struct ufx_data *dev) { int status = ufx_reg_write(dev, 0x106C, 0x00); check_warn_return(status, "failed to disable I2C"); status = ufx_reg_write(dev, 0x3010, 0x00000000); check_warn_return(status, "failed to write 0x3010"); /* A0h is std for any EDID, right shifted by one */ status = ufx_reg_clear_and_set_bits(dev, 0x1004, 0x3FF, (0xA0 >> 1)); check_warn_return(status, "failed to set TAR bits in 0x1004"); status = ufx_reg_write(dev, 0x106C, 0x01); check_warn_return(status, "failed to enable I2C"); return 0; } /* wait for BUSY to clear, with a timeout of 50ms with 10ms sleeps. if no * monitor is connected, there is no error except for timeout */ static int ufx_i2c_wait_busy(struct ufx_data *dev) { u32 tmp; int i, status; for (i = 0; i < 15; i++) { status = ufx_reg_read(dev, 0x1100, &tmp); check_warn_return(status, "0x1100 read failed"); /* if BUSY is clear, check for error */ if ((tmp & 0x80000000) == 0) { if (tmp & 0x20000000) { pr_warn("I2C read failed, 0x1100=0x%08x", tmp); return -EIO; } return 0; } /* perform the first 10 retries without delay */ if (i >= 10) msleep(10); } pr_warn("I2C access timed out, resetting I2C hardware"); status = ufx_reg_write(dev, 0x1100, 0x40000000); check_warn_return(status, "0x1100 write failed"); return -ETIMEDOUT; } /* reads a 128-byte EDID block from the currently selected port and TAR */ static int ufx_read_edid(struct ufx_data *dev, u8 *edid, int edid_len) { int i, j, status; u32 *edid_u32 = (u32 *)edid; BUG_ON(edid_len != EDID_LENGTH); status = ufx_i2c_configure(dev); if (status < 0) { pr_err("ufx_i2c_configure failed"); return status; } memset(edid, 0xff, EDID_LENGTH); /* Read the 128-byte EDID as 2 bursts of 64 bytes */ for (i = 0; i < 2; i++) { u32 temp = 0x28070000 | (63 << 20) | (((u32)(i * 64)) << 8); status = ufx_reg_write(dev, 0x1100, temp); check_warn_return(status, "Failed to write 0x1100"); temp |= 0x80000000; status = ufx_reg_write(dev, 0x1100, temp); check_warn_return(status, "Failed to write 0x1100"); status = ufx_i2c_wait_busy(dev); check_warn_return(status, "Timeout waiting for I2C BUSY to clear"); for (j = 0; j < 16; j++) { u32 data_reg_addr = 0x1110 + (j * 4); status = ufx_reg_read(dev, data_reg_addr, edid_u32++); check_warn_return(status, "Error reading i2c data"); } } /* all FF's in the first 16 bytes indicates nothing is connected */ for (i = 0; i < 16; i++) { if (edid[i] != 0xFF) { pr_debug("edid data read successfully"); return EDID_LENGTH; } } pr_warn("edid data contains all 0xff"); return -ETIMEDOUT; } /* 1) use sw default * 2) Parse into various fb_info structs * 3) Allocate virtual framebuffer memory to back highest res mode * * Parses EDID into three places used by various parts of fbdev: * fb_var_screeninfo contains the timing of the monitor's preferred mode * fb_info.monspecs is full parsed EDID info, including monspecs.modedb * fb_info.modelist is a linked list of all monitor & VESA modes which work * * If EDID is not readable/valid, then modelist is all VESA modes, * monspecs is NULL, and fb_var_screeninfo is set to safe VESA mode * Returns 0 if successful */ static int ufx_setup_modes(struct ufx_data *dev, struct fb_info *info, char *default_edid, size_t default_edid_size) { const struct fb_videomode *default_vmode = NULL; u8 *edid; int i, result = 0, tries = 3; if (refcount_read(&info->count)) /* only use mutex if info has been registered */ mutex_lock(&info->lock); edid = kmalloc(EDID_LENGTH, GFP_KERNEL); if (!edid) { result = -ENOMEM; goto error; } fb_destroy_modelist(&info->modelist); memset(&info->monspecs, 0, sizeof(info->monspecs)); /* Try to (re)read EDID from hardware first * EDID data may return, but not parse as valid * Try again a few times, in case of e.g. analog cable noise */ while (tries--) { i = ufx_read_edid(dev, edid, EDID_LENGTH); if (i >= EDID_LENGTH) fb_edid_to_monspecs(edid, &info->monspecs); if (info->monspecs.modedb_len > 0) { dev->edid = edid; dev->edid_size = i; break; } } /* If that fails, use a previously returned EDID if available */ if (info->monspecs.modedb_len == 0) { pr_err("Unable to get valid EDID from device/display\n"); if (dev->edid) { fb_edid_to_monspecs(dev->edid, &info->monspecs); if (info->monspecs.modedb_len > 0) pr_err("Using previously queried EDID\n"); } } /* If that fails, use the default EDID we were handed */ if (info->monspecs.modedb_len == 0) { if (default_edid_size >= EDID_LENGTH) { fb_edid_to_monspecs(default_edid, &info->monspecs); if (info->monspecs.modedb_len > 0) { memcpy(edid, default_edid, default_edid_size); dev->edid = edid; dev->edid_size = default_edid_size; pr_err("Using default/backup EDID\n"); } } } /* If we've got modes, let's pick a best default mode */ if (info->monspecs.modedb_len > 0) { for (i = 0; i < info->monspecs.modedb_len; i++) { if (ufx_is_valid_mode(&info->monspecs.modedb[i], info)) fb_add_videomode(&info->monspecs.modedb[i], &info->modelist); else /* if we've removed top/best mode */ info->monspecs.misc &= ~FB_MISC_1ST_DETAIL; } default_vmode = fb_find_best_display(&info->monspecs, &info->modelist); } /* If everything else has failed, fall back to safe default mode */ if (default_vmode == NULL) { struct fb_videomode fb_vmode = {0}; /* Add the standard VESA modes to our modelist * Since we don't have EDID, there may be modes that * overspec monitor and/or are incorrect aspect ratio, etc. * But at least the user has a chance to choose */ for (i = 0; i < VESA_MODEDB_SIZE; i++) { if (ufx_is_valid_mode((struct fb_videomode *) &vesa_modes[i], info)) fb_add_videomode(&vesa_modes[i], &info->modelist); } /* default to resolution safe for projectors * (since they are most common case without EDID) */ fb_vmode.xres = 800; fb_vmode.yres = 600; fb_vmode.refresh = 60; default_vmode = fb_find_nearest_mode(&fb_vmode, &info->modelist); } /* If we have good mode and no active clients */ if ((default_vmode != NULL) && (dev->fb_count == 0)) { fb_videomode_to_var(&info->var, default_vmode); ufx_var_color_format(&info->var); /* with mode size info, we can now alloc our framebuffer */ memcpy(&info->fix, &ufx_fix, sizeof(ufx_fix)); info->fix.line_length = info->var.xres * (info->var.bits_per_pixel / 8); result = ufx_realloc_framebuffer(dev, info); } else result = -EINVAL; error: if (edid && (dev->edid != edid)) kfree(edid); if (refcount_read(&info->count)) mutex_unlock(&info->lock); return result; } static int ufx_usb_probe(struct usb_interface *interface, const struct usb_device_id *id) { struct usb_device *usbdev; struct ufx_data *dev; struct fb_info *info; int retval = -ENOMEM; u32 id_rev, fpga_rev; /* usb initialization */ usbdev = interface_to_usbdev(interface); BUG_ON(!usbdev); dev = kzalloc(sizeof(*dev), GFP_KERNEL); if (dev == NULL) { dev_err(&usbdev->dev, "ufx_usb_probe: failed alloc of dev struct\n"); return -ENOMEM; } /* we need to wait for both usb and fbdev to spin down on disconnect */ kref_init(&dev->kref); /* matching kref_put in usb .disconnect fn */ kref_get(&dev->kref); /* matching kref_put in free_framebuffer_work */ dev->udev = usbdev; dev->gdev = &usbdev->dev; /* our generic struct device * */ usb_set_intfdata(interface, dev); dev_dbg(dev->gdev, "%s %s - serial #%s\n", usbdev->manufacturer, usbdev->product, usbdev->serial); dev_dbg(dev->gdev, "vid_%04x&pid_%04x&rev_%04x driver's ufx_data struct at %p\n", le16_to_cpu(usbdev->descriptor.idVendor), le16_to_cpu(usbdev->descriptor.idProduct), le16_to_cpu(usbdev->descriptor.bcdDevice), dev); dev_dbg(dev->gdev, "console enable=%d\n", console); dev_dbg(dev->gdev, "fb_defio enable=%d\n", fb_defio); if (!ufx_alloc_urb_list(dev, WRITES_IN_FLIGHT, MAX_TRANSFER)) { dev_err(dev->gdev, "ufx_alloc_urb_list failed\n"); goto put_ref; } /* We don't register a new USB class. Our client interface is fbdev */ /* allocates framebuffer driver structure, not framebuffer memory */ info = framebuffer_alloc(0, &usbdev->dev); if (!info) { dev_err(dev->gdev, "framebuffer_alloc failed\n"); goto free_urb_list; } dev->info = info; info->par = dev; info->pseudo_palette = dev->pseudo_palette; info->fbops = &ufx_ops; INIT_LIST_HEAD(&info->modelist); retval = fb_alloc_cmap(&info->cmap, 256, 0); if (retval < 0) { dev_err(dev->gdev, "fb_alloc_cmap failed %x\n", retval); goto destroy_modedb; } retval = ufx_reg_read(dev, 0x3000, &id_rev); check_warn_goto_error(retval, "error %d reading 0x3000 register from device", retval); dev_dbg(dev->gdev, "ID_REV register value 0x%08x", id_rev); retval = ufx_reg_read(dev, 0x3004, &fpga_rev); check_warn_goto_error(retval, "error %d reading 0x3004 register from device", retval); dev_dbg(dev->gdev, "FPGA_REV register value 0x%08x", fpga_rev); dev_dbg(dev->gdev, "resetting device"); retval = ufx_lite_reset(dev); check_warn_goto_error(retval, "error %d resetting device", retval); dev_dbg(dev->gdev, "configuring system clock"); retval = ufx_config_sys_clk(dev); check_warn_goto_error(retval, "error %d configuring system clock", retval); dev_dbg(dev->gdev, "configuring DDR2 controller"); retval = ufx_config_ddr2(dev); check_warn_goto_error(retval, "error %d initialising DDR2 controller", retval); dev_dbg(dev->gdev, "configuring I2C controller"); retval = ufx_i2c_init(dev); check_warn_goto_error(retval, "error %d initialising I2C controller", retval); dev_dbg(dev->gdev, "selecting display mode"); retval = ufx_setup_modes(dev, info, NULL, 0); check_warn_goto_error(retval, "unable to find common mode for display and adapter"); retval = ufx_reg_set_bits(dev, 0x4000, 0x00000001); if (retval < 0) { dev_err(dev->gdev, "error %d enabling graphics engine", retval); goto setup_modes; } /* ready to begin using device */ atomic_set(&dev->usb_active, 1); dev_dbg(dev->gdev, "checking var"); retval = ufx_ops_check_var(&info->var, info); if (retval < 0) { dev_err(dev->gdev, "error %d ufx_ops_check_var", retval); goto reset_active; } dev_dbg(dev->gdev, "setting par"); retval = ufx_ops_set_par(info); if (retval < 0) { dev_err(dev->gdev, "error %d ufx_ops_set_par", retval); goto reset_active; } dev_dbg(dev->gdev, "registering framebuffer"); retval = register_framebuffer(info); if (retval < 0) { dev_err(dev->gdev, "error %d register_framebuffer", retval); goto reset_active; } dev_info(dev->gdev, "SMSC UDX USB device /dev/fb%d attached. %dx%d resolution." " Using %dK framebuffer memory\n", info->node, info->var.xres, info->var.yres, info->fix.smem_len >> 10); return 0; reset_active: atomic_set(&dev->usb_active, 0); setup_modes: fb_destroy_modedb(info->monspecs.modedb); vfree(info->screen_buffer); fb_destroy_modelist(&info->modelist); error: fb_dealloc_cmap(&info->cmap); destroy_modedb: framebuffer_release(info); free_urb_list: if (dev->urbs.count > 0) ufx_free_urb_list(dev); put_ref: kref_put(&dev->kref, ufx_free); /* ref for framebuffer */ kref_put(&dev->kref, ufx_free); /* last ref from kref_init */ return retval; } static void ufx_usb_disconnect(struct usb_interface *interface) { struct ufx_data *dev; struct fb_info *info; mutex_lock(&disconnect_mutex); dev = usb_get_intfdata(interface); info = dev->info; pr_debug("USB disconnect starting\n"); /* we virtualize until all fb clients release. Then we free */ dev->virtualized = true; /* When non-active we'll update virtual framebuffer, but no new urbs */ atomic_set(&dev->usb_active, 0); usb_set_intfdata(interface, NULL); /* if clients still have us open, will be freed on last close */ if (dev->fb_count == 0) ufx_free_framebuffer(dev); /* this function will wait for all in-flight urbs to complete */ if (dev->urbs.count > 0) ufx_free_urb_list(dev); pr_debug("freeing ufx_data %p", dev); unregister_framebuffer(info); mutex_unlock(&disconnect_mutex); } static struct usb_driver ufx_driver = { .name = "smscufx", .probe = ufx_usb_probe, .disconnect = ufx_usb_disconnect, .id_table = id_table, }; module_usb_driver(ufx_driver); static void ufx_urb_completion(struct urb *urb) { struct urb_node *unode = urb->context; struct ufx_data *dev = unode->dev; unsigned long flags; /* sync/async unlink faults aren't errors */ if (urb->status) { if (!(urb->status == -ENOENT || urb->status == -ECONNRESET || urb->status == -ESHUTDOWN)) { pr_err("%s - nonzero write bulk status received: %d\n", __func__, urb->status); atomic_set(&dev->lost_pixels, 1); } } urb->transfer_buffer_length = dev->urbs.size; /* reset to actual */ spin_lock_irqsave(&dev->urbs.lock, flags); list_add_tail(&unode->entry, &dev->urbs.list); dev->urbs.available++; spin_unlock_irqrestore(&dev->urbs.lock, flags); /* When using fb_defio, we deadlock if up() is called * while another is waiting. So queue to another process */ if (fb_defio) schedule_delayed_work(&unode->release_urb_work, 0); else up(&dev->urbs.limit_sem); } static void ufx_free_urb_list(struct ufx_data *dev) { int count = dev->urbs.count; struct list_head *node; struct urb_node *unode; struct urb *urb; int ret; unsigned long flags; pr_debug("Waiting for completes and freeing all render urbs\n"); /* keep waiting and freeing, until we've got 'em all */ while (count--) { /* Getting interrupted means a leak, but ok at shutdown*/ ret = down_interruptible(&dev->urbs.limit_sem); if (ret) break; spin_lock_irqsave(&dev->urbs.lock, flags); node = dev->urbs.list.next; /* have reserved one with sem */ list_del_init(node); spin_unlock_irqrestore(&dev->urbs.lock, flags); unode = list_entry(node, struct urb_node, entry); urb = unode->urb; /* Free each separately allocated piece */ usb_free_coherent(urb->dev, dev->urbs.size, urb->transfer_buffer, urb->transfer_dma); usb_free_urb(urb); kfree(node); } } static int ufx_alloc_urb_list(struct ufx_data *dev, int count, size_t size) { int i = 0; struct urb *urb; struct urb_node *unode; char *buf; spin_lock_init(&dev->urbs.lock); dev->urbs.size = size; INIT_LIST_HEAD(&dev->urbs.list); while (i < count) { unode = kzalloc(sizeof(*unode), GFP_KERNEL); if (!unode) break; unode->dev = dev; INIT_DELAYED_WORK(&unode->release_urb_work, ufx_release_urb_work); urb = usb_alloc_urb(0, GFP_KERNEL); if (!urb) { kfree(unode); break; } unode->urb = urb; buf = usb_alloc_coherent(dev->udev, size, GFP_KERNEL, &urb->transfer_dma); if (!buf) { kfree(unode); usb_free_urb(urb); break; } /* urb->transfer_buffer_length set to actual before submit */ usb_fill_bulk_urb(urb, dev->udev, usb_sndbulkpipe(dev->udev, 1), buf, size, ufx_urb_completion, unode); urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; list_add_tail(&unode->entry, &dev->urbs.list); i++; } sema_init(&dev->urbs.limit_sem, i); dev->urbs.count = i; dev->urbs.available = i; pr_debug("allocated %d %d byte urbs\n", i, (int) size); return i; } static struct urb *ufx_get_urb(struct ufx_data *dev) { int ret = 0; struct list_head *entry; struct urb_node *unode; struct urb *urb = NULL; unsigned long flags; /* Wait for an in-flight buffer to complete and get re-queued */ ret = down_timeout(&dev->urbs.limit_sem, GET_URB_TIMEOUT); if (ret) { atomic_set(&dev->lost_pixels, 1); pr_warn("wait for urb interrupted: %x available: %d\n", ret, dev->urbs.available); goto error; } spin_lock_irqsave(&dev->urbs.lock, flags); BUG_ON(list_empty(&dev->urbs.list)); /* reserved one with limit_sem */ entry = dev->urbs.list.next; list_del_init(entry); dev->urbs.available--; spin_unlock_irqrestore(&dev->urbs.lock, flags); unode = list_entry(entry, struct urb_node, entry); urb = unode->urb; error: return urb; } static int ufx_submit_urb(struct ufx_data *dev, struct urb *urb, size_t len) { int ret; BUG_ON(len > dev->urbs.size); urb->transfer_buffer_length = len; /* set to actual payload len */ ret = usb_submit_urb(urb, GFP_KERNEL); if (ret) { ufx_urb_completion(urb); /* because no one else will */ atomic_set(&dev->lost_pixels, 1); pr_err("usb_submit_urb error %x\n", ret); } return ret; } module_param(console, bool, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP); MODULE_PARM_DESC(console, "Allow fbcon to be used on this display"); module_param(fb_defio, bool, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP); MODULE_PARM_DESC(fb_defio, "Enable fb_defio mmap support"); MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); MODULE_DESCRIPTION("SMSC UFX kernel framebuffer driver"); MODULE_LICENSE("GPL");
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