| // 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_DEFAULT | 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 (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; |
| } |
| |
| /* Path triggered by usermode clients who write to filesystem |
| * e.g. cat filename > /dev/fb1 |
| * Not used by X Windows or text-mode console. But useful for testing. |
| * Slow because of extra copy and we must assume all pixels dirty. */ |
| static ssize_t ufx_ops_write(struct fb_info *info, const char __user *buf, |
| size_t count, loff_t *ppos) |
| { |
| ssize_t result; |
| struct ufx_data *dev = info->par; |
| u32 offset = (u32) *ppos; |
| |
| result = fb_sys_write(info, buf, count, ppos); |
| |
| if (result > 0) { |
| int start = max((int)(offset / info->fix.line_length), 0); |
| int lines = min((u32)((result / info->fix.line_length) + 1), |
| (u32)info->var.yres); |
| |
| ufx_handle_damage(dev, 0, start, info->var.xres, lines); |
| } |
| |
| return result; |
| } |
| |
| static void ufx_ops_copyarea(struct fb_info *info, |
| const struct fb_copyarea *area) |
| { |
| |
| struct ufx_data *dev = info->par; |
| |
| sys_copyarea(info, area); |
| |
| ufx_handle_damage(dev, area->dx, area->dy, |
| area->width, area->height); |
| } |
| |
| static void ufx_ops_imageblit(struct fb_info *info, |
| const struct fb_image *image) |
| { |
| struct ufx_data *dev = info->par; |
| |
| sys_imageblit(info, image); |
| |
| ufx_handle_damage(dev, image->dx, image->dy, |
| image->width, image->height); |
| } |
| |
| static void ufx_ops_fillrect(struct fb_info *info, |
| const struct fb_fillrect *rect) |
| { |
| struct ufx_data *dev = info->par; |
| |
| sys_fillrect(info, rect); |
| |
| ufx_handle_damage(dev, rect->dx, rect->dy, rect->width, |
| rect->height); |
| } |
| |
| /* 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 */ |
| struct page *cur = pageref->page; |
| const int x = 0; |
| const int width = dev->info->var.xres; |
| const int y = (cur->index << PAGE_SHIFT) / (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_base); |
| |
| 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_base; |
| 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 const struct fb_ops ufx_ops = { |
| .owner = THIS_MODULE, |
| .fb_read = fb_sys_read, |
| .fb_write = ufx_ops_write, |
| .fb_setcolreg = ufx_ops_setcolreg, |
| .fb_fillrect = ufx_ops_fillrect, |
| .fb_copyarea = ufx_ops_copyarea, |
| .fb_imageblit = ufx_ops_imageblit, |
| .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_base; |
| 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_base) { |
| memcpy(new_fb, old_fb, old_len); |
| vfree(info->screen_base); |
| } |
| |
| info->screen_base = 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 (info->dev) /* 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 (info->dev) |
| 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_base); |
| 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"); |