--- /dev/null
+/*
+ * linux/drivers/video/sa1100fb.c
+ *
+ * Copyright (C) 1999 Eric A. Thomas
+ * Based on acornfb.c Copyright (C) Russell King.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ * StrongARM 1100 LCD Controller Frame Buffer Driver
+ *
+ * Please direct your questions and comments on this driver to the following
+ * email address:
+ *
+ * linux-arm-kernel@lists.arm.linux.org.uk
+ *
+ * Clean patches should be sent to the ARM Linux Patch System. Please see the
+ * following web page for more information:
+ *
+ * http://www.arm.linux.org.uk/developer/patches/info.shtml
+ *
+ * Thank you.
+ *
+ * Known problems:
+ * - With the Neponset plugged into an Assabet, LCD powerdown
+ * doesn't work (LCD stays powered up). Therefore we shouldn't
+ * blank the screen.
+ * - We don't limit the CPU clock rate nor the mode selection
+ * according to the available SDRAM bandwidth.
+ *
+ * Other notes:
+ * - Linear grayscale palettes and the kernel.
+ * Such code does not belong in the kernel. The kernel frame buffer
+ * drivers do not expect a linear colourmap, but a colourmap based on
+ * the VT100 standard mapping.
+ *
+ * If your _userspace_ requires a linear colourmap, then the setup of
+ * such a colourmap belongs _in userspace_, not in the kernel. Code
+ * to set the colourmap correctly from user space has been sent to
+ * David Neuer. It's around 8 lines of C code, plus another 4 to
+ * detect if we are using grayscale.
+ *
+ * - The following must never be specified in a panel definition:
+ * LCCR0_LtlEnd, LCCR3_PixClkDiv, LCCR3_VrtSnchL, LCCR3_HorSnchL
+ *
+ * - The following should be specified:
+ * either LCCR0_Color or LCCR0_Mono
+ * either LCCR0_Sngl or LCCR0_Dual
+ * either LCCR0_Act or LCCR0_Pas
+ * either LCCR3_OutEnH or LCCD3_OutEnL
+ * either LCCR3_PixRsEdg or LCCR3_PixFlEdg
+ * either LCCR3_ACBsDiv or LCCR3_ACBsCntOff
+ *
+ * Code Status:
+ * 1999/04/01:
+ * - Driver appears to be working for Brutus 320x200x8bpp mode. Other
+ * resolutions are working, but only the 8bpp mode is supported.
+ * Changes need to be made to the palette encode and decode routines
+ * to support 4 and 16 bpp modes.
+ * Driver is not designed to be a module. The FrameBuffer is statically
+ * allocated since dynamic allocation of a 300k buffer cannot be
+ * guaranteed.
+ *
+ * 1999/06/17:
+ * - FrameBuffer memory is now allocated at run-time when the
+ * driver is initialized.
+ *
+ * 2000/04/10: Nicolas Pitre <nico@fluxnic.net>
+ * - Big cleanup for dynamic selection of machine type at run time.
+ *
+ * 2000/07/19: Jamey Hicks <jamey@crl.dec.com>
+ * - Support for Bitsy aka Compaq iPAQ H3600 added.
+ *
+ * 2000/08/07: Tak-Shing Chan <tchan.rd@idthk.com>
+ * Jeff Sutherland <jsutherland@accelent.com>
+ * - Resolved an issue caused by a change made to the Assabet's PLD
+ * earlier this year which broke the framebuffer driver for newer
+ * Phase 4 Assabets. Some other parameters were changed to optimize
+ * for the Sharp display.
+ *
+ * 2000/08/09: Kunihiko IMAI <imai@vasara.co.jp>
+ * - XP860 support added
+ *
+ * 2000/08/19: Mark Huang <mhuang@livetoy.com>
+ * - Allows standard options to be passed on the kernel command line
+ * for most common passive displays.
+ *
+ * 2000/08/29:
+ * - s/save_flags_cli/local_irq_save/
+ * - remove unneeded extra save_flags_cli in sa1100fb_enable_lcd_controller
+ *
+ * 2000/10/10: Erik Mouw <J.A.K.Mouw@its.tudelft.nl>
+ * - Updated LART stuff. Fixed some minor bugs.
+ *
+ * 2000/10/30: Murphy Chen <murphy@mail.dialogue.com.tw>
+ * - Pangolin support added
+ *
+ * 2000/10/31: Roman Jordan <jor@hoeft-wessel.de>
+ * - Huw Webpanel support added
+ *
+ * 2000/11/23: Eric Peng <ericpeng@coventive.com>
+ * - Freebird add
+ *
+ * 2001/02/07: Jamey Hicks <jamey.hicks@compaq.com>
+ * Cliff Brake <cbrake@accelent.com>
+ * - Added PM callback
+ *
+ * 2001/05/26: <rmk@arm.linux.org.uk>
+ * - Fix 16bpp so that (a) we use the right colours rather than some
+ * totally random colour depending on what was in page 0, and (b)
+ * we don't de-reference a NULL pointer.
+ * - remove duplicated implementation of consistent_alloc()
+ * - convert dma address types to dma_addr_t
+ * - remove unused 'montype' stuff
+ * - remove redundant zero inits of init_var after the initial
+ * memset.
+ * - remove allow_modeset (acornfb idea does not belong here)
+ *
+ * 2001/05/28: <rmk@arm.linux.org.uk>
+ * - massive cleanup - move machine dependent data into structures
+ * - I've left various #warnings in - if you see one, and know
+ * the hardware concerned, please get in contact with me.
+ *
+ * 2001/05/31: <rmk@arm.linux.org.uk>
+ * - Fix LCCR1 HSW value, fix all machine type specifications to
+ * keep values in line. (Please check your machine type specs)
+ *
+ * 2001/06/10: <rmk@arm.linux.org.uk>
+ * - Fiddle with the LCD controller from task context only; mainly
+ * so that we can run with interrupts on, and sleep.
+ * - Convert #warnings into #errors. No pain, no gain. ;)
+ *
+ * 2001/06/14: <rmk@arm.linux.org.uk>
+ * - Make the palette BPS value for 12bpp come out correctly.
+ * - Take notice of "greyscale" on any colour depth.
+ * - Make truecolor visuals use the RGB channel encoding information.
+ *
+ * 2001/07/02: <rmk@arm.linux.org.uk>
+ * - Fix colourmap problems.
+ *
+ * 2001/07/13: <abraham@2d3d.co.za>
+ * - Added support for the ICP LCD-Kit01 on LART. This LCD is
+ * manufactured by Prime View, model no V16C6448AB
+ *
+ * 2001/07/23: <rmk@arm.linux.org.uk>
+ * - Hand merge version from handhelds.org CVS tree. See patch
+ * notes for 595/1 for more information.
+ * - Drop 12bpp (it's 16bpp with different colour register mappings).
+ * - This hardware can not do direct colour. Therefore we don't
+ * support it.
+ *
+ * 2001/07/27: <rmk@arm.linux.org.uk>
+ * - Halve YRES on dual scan LCDs.
+ *
+ * 2001/08/22: <rmk@arm.linux.org.uk>
+ * - Add b/w iPAQ pixclock value.
+ *
+ * 2001/10/12: <rmk@arm.linux.org.uk>
+ * - Add patch 681/1 and clean up stork definitions.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/fb.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/cpufreq.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/mutex.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+
+#include <video/sa1100fb.h>
+
+#include <mach/hardware.h>
+#include <asm/mach-types.h>
+#include <mach/shannon.h>
+
+/*
+ * Complain if VAR is out of range.
+ */
+#define DEBUG_VAR 1
+
+#include "sa1100fb.h"
+
+static const struct sa1100fb_rgb rgb_4 = {
+ .red = { .offset = 0, .length = 4, },
+ .green = { .offset = 0, .length = 4, },
+ .blue = { .offset = 0, .length = 4, },
+ .transp = { .offset = 0, .length = 0, },
+};
+
+static const struct sa1100fb_rgb rgb_8 = {
+ .red = { .offset = 0, .length = 8, },
+ .green = { .offset = 0, .length = 8, },
+ .blue = { .offset = 0, .length = 8, },
+ .transp = { .offset = 0, .length = 0, },
+};
+
+static const struct sa1100fb_rgb def_rgb_16 = {
+ .red = { .offset = 11, .length = 5, },
+ .green = { .offset = 5, .length = 6, },
+ .blue = { .offset = 0, .length = 5, },
+ .transp = { .offset = 0, .length = 0, },
+};
+
+
+
+static int sa1100fb_activate_var(struct fb_var_screeninfo *var, struct sa1100fb_info *);
+static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state);
+
+static inline void sa1100fb_schedule_work(struct sa1100fb_info *fbi, u_int state)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ /*
+ * We need to handle two requests being made at the same time.
+ * There are two important cases:
+ * 1. When we are changing VT (C_REENABLE) while unblanking (C_ENABLE)
+ * We must perform the unblanking, which will do our REENABLE for us.
+ * 2. When we are blanking, but immediately unblank before we have
+ * blanked. We do the "REENABLE" thing here as well, just to be sure.
+ */
+ if (fbi->task_state == C_ENABLE && state == C_REENABLE)
+ state = (u_int) -1;
+ if (fbi->task_state == C_DISABLE && state == C_ENABLE)
+ state = C_REENABLE;
+
+ if (state != (u_int)-1) {
+ fbi->task_state = state;
+ schedule_work(&fbi->task);
+ }
+ local_irq_restore(flags);
+}
+
+static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
+{
+ chan &= 0xffff;
+ chan >>= 16 - bf->length;
+ return chan << bf->offset;
+}
+
+/*
+ * Convert bits-per-pixel to a hardware palette PBS value.
+ */
+static inline u_int palette_pbs(struct fb_var_screeninfo *var)
+{
+ int ret = 0;
+ switch (var->bits_per_pixel) {
+ case 4: ret = 0 << 12; break;
+ case 8: ret = 1 << 12; break;
+ case 16: ret = 2 << 12; break;
+ }
+ return ret;
+}
+
+static int
+sa1100fb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
+ u_int trans, struct fb_info *info)
+{
+ struct sa1100fb_info *fbi =
+ container_of(info, struct sa1100fb_info, fb);
+ u_int val, ret = 1;
+
+ if (regno < fbi->palette_size) {
+ val = ((red >> 4) & 0xf00);
+ val |= ((green >> 8) & 0x0f0);
+ val |= ((blue >> 12) & 0x00f);
+
+ if (regno == 0)
+ val |= palette_pbs(&fbi->fb.var);
+
+ fbi->palette_cpu[regno] = val;
+ ret = 0;
+ }
+ return ret;
+}
+
+static int
+sa1100fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+ u_int trans, struct fb_info *info)
+{
+ struct sa1100fb_info *fbi =
+ container_of(info, struct sa1100fb_info, fb);
+ unsigned int val;
+ int ret = 1;
+
+ /*
+ * If inverse mode was selected, invert all the colours
+ * rather than the register number. The register number
+ * is what you poke into the framebuffer to produce the
+ * colour you requested.
+ */
+ if (fbi->inf->cmap_inverse) {
+ red = 0xffff - red;
+ green = 0xffff - green;
+ blue = 0xffff - blue;
+ }
+
+ /*
+ * If greyscale is true, then we convert the RGB value
+ * to greyscale no mater what visual we are using.
+ */
+ if (fbi->fb.var.grayscale)
+ red = green = blue = (19595 * red + 38470 * green +
+ 7471 * blue) >> 16;
+
+ switch (fbi->fb.fix.visual) {
+ case FB_VISUAL_TRUECOLOR:
+ /*
+ * 12 or 16-bit True Colour. We encode the RGB value
+ * according to the RGB bitfield information.
+ */
+ if (regno < 16) {
+ u32 *pal = fbi->fb.pseudo_palette;
+
+ val = chan_to_field(red, &fbi->fb.var.red);
+ val |= chan_to_field(green, &fbi->fb.var.green);
+ val |= chan_to_field(blue, &fbi->fb.var.blue);
+
+ pal[regno] = val;
+ ret = 0;
+ }
+ break;
+
+ case FB_VISUAL_STATIC_PSEUDOCOLOR:
+ case FB_VISUAL_PSEUDOCOLOR:
+ ret = sa1100fb_setpalettereg(regno, red, green, blue, trans, info);
+ break;
+ }
+
+ return ret;
+}
+
+#ifdef CONFIG_CPU_FREQ
+/*
+ * sa1100fb_display_dma_period()
+ * Calculate the minimum period (in picoseconds) between two DMA
+ * requests for the LCD controller. If we hit this, it means we're
+ * doing nothing but LCD DMA.
+ */
+static inline unsigned int sa1100fb_display_dma_period(struct fb_var_screeninfo *var)
+{
+ /*
+ * Period = pixclock * bits_per_byte * bytes_per_transfer
+ * / memory_bits_per_pixel;
+ */
+ return var->pixclock * 8 * 16 / var->bits_per_pixel;
+}
+#endif
+
+/*
+ * sa1100fb_check_var():
+ * Round up in the following order: bits_per_pixel, xres,
+ * yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
+ * bitfields, horizontal timing, vertical timing.
+ */
+static int
+sa1100fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ struct sa1100fb_info *fbi =
+ container_of(info, struct sa1100fb_info, fb);
+ int rgbidx;
+
+ if (var->xres < MIN_XRES)
+ var->xres = MIN_XRES;
+ if (var->yres < MIN_YRES)
+ var->yres = MIN_YRES;
+ if (var->xres > fbi->inf->xres)
+ var->xres = fbi->inf->xres;
+ if (var->yres > fbi->inf->yres)
+ var->yres = fbi->inf->yres;
+ var->xres_virtual = max(var->xres_virtual, var->xres);
+ var->yres_virtual = max(var->yres_virtual, var->yres);
+
+ dev_dbg(fbi->dev, "var->bits_per_pixel=%d\n", var->bits_per_pixel);
+ switch (var->bits_per_pixel) {
+ case 4:
+ rgbidx = RGB_4;
+ break;
+ case 8:
+ rgbidx = RGB_8;
+ break;
+ case 16:
+ rgbidx = RGB_16;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /*
+ * Copy the RGB parameters for this display
+ * from the machine specific parameters.
+ */
+ var->red = fbi->rgb[rgbidx]->red;
+ var->green = fbi->rgb[rgbidx]->green;
+ var->blue = fbi->rgb[rgbidx]->blue;
+ var->transp = fbi->rgb[rgbidx]->transp;
+
+ dev_dbg(fbi->dev, "RGBT length = %d:%d:%d:%d\n",
+ var->red.length, var->green.length, var->blue.length,
+ var->transp.length);
+
+ dev_dbg(fbi->dev, "RGBT offset = %d:%d:%d:%d\n",
+ var->red.offset, var->green.offset, var->blue.offset,
+ var->transp.offset);
+
+#ifdef CONFIG_CPU_FREQ
+ dev_dbg(fbi->dev, "dma period = %d ps, clock = %ld kHz\n",
+ sa1100fb_display_dma_period(var),
+ clk_get_rate(fbi->clk) / 1000);
+#endif
+
+ return 0;
+}
+
+static void sa1100fb_set_visual(struct sa1100fb_info *fbi, u32 visual)
+{
+ if (fbi->inf->set_visual)
+ fbi->inf->set_visual(visual);
+}
+
+/*
+ * sa1100fb_set_par():
+ * Set the user defined part of the display for the specified console
+ */
+static int sa1100fb_set_par(struct fb_info *info)
+{
+ struct sa1100fb_info *fbi =
+ container_of(info, struct sa1100fb_info, fb);
+ struct fb_var_screeninfo *var = &info->var;
+ unsigned long palette_mem_size;
+
+ dev_dbg(fbi->dev, "set_par\n");
+
+ if (var->bits_per_pixel == 16)
+ fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR;
+ else if (!fbi->inf->cmap_static)
+ fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
+ else {
+ /*
+ * Some people have weird ideas about wanting static
+ * pseudocolor maps. I suspect their user space
+ * applications are broken.
+ */
+ fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
+ }
+
+ fbi->fb.fix.line_length = var->xres_virtual *
+ var->bits_per_pixel / 8;
+ fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
+
+ palette_mem_size = fbi->palette_size * sizeof(u16);
+
+ dev_dbg(fbi->dev, "palette_mem_size = 0x%08lx\n", palette_mem_size);
+
+ fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE - palette_mem_size);
+ fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size;
+
+ /*
+ * Set (any) board control register to handle new color depth
+ */
+ sa1100fb_set_visual(fbi, fbi->fb.fix.visual);
+ sa1100fb_activate_var(var, fbi);
+
+ return 0;
+}
+
+#if 0
+static int
+sa1100fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
+ struct fb_info *info)
+{
+ struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
+
+ /*
+ * Make sure the user isn't doing something stupid.
+ */
+ if (!kspc && (fbi->fb.var.bits_per_pixel == 16 || fbi->inf->cmap_static))
+ return -EINVAL;
+
+ return gen_set_cmap(cmap, kspc, con, info);
+}
+#endif
+
+/*
+ * Formal definition of the VESA spec:
+ * On
+ * This refers to the state of the display when it is in full operation
+ * Stand-By
+ * This defines an optional operating state of minimal power reduction with
+ * the shortest recovery time
+ * Suspend
+ * This refers to a level of power management in which substantial power
+ * reduction is achieved by the display. The display can have a longer
+ * recovery time from this state than from the Stand-by state
+ * Off
+ * This indicates that the display is consuming the lowest level of power
+ * and is non-operational. Recovery from this state may optionally require
+ * the user to manually power on the monitor
+ *
+ * Now, the fbdev driver adds an additional state, (blank), where they
+ * turn off the video (maybe by colormap tricks), but don't mess with the
+ * video itself: think of it semantically between on and Stand-By.
+ *
+ * So here's what we should do in our fbdev blank routine:
+ *
+ * VESA_NO_BLANKING (mode 0) Video on, front/back light on
+ * VESA_VSYNC_SUSPEND (mode 1) Video on, front/back light off
+ * VESA_HSYNC_SUSPEND (mode 2) Video on, front/back light off
+ * VESA_POWERDOWN (mode 3) Video off, front/back light off
+ *
+ * This will match the matrox implementation.
+ */
+/*
+ * sa1100fb_blank():
+ * Blank the display by setting all palette values to zero. Note, the
+ * 12 and 16 bpp modes don't really use the palette, so this will not
+ * blank the display in all modes.
+ */
+static int sa1100fb_blank(int blank, struct fb_info *info)
+{
+ struct sa1100fb_info *fbi =
+ container_of(info, struct sa1100fb_info, fb);
+ int i;
+
+ dev_dbg(fbi->dev, "sa1100fb_blank: blank=%d\n", blank);
+
+ switch (blank) {
+ case FB_BLANK_POWERDOWN:
+ case FB_BLANK_VSYNC_SUSPEND:
+ case FB_BLANK_HSYNC_SUSPEND:
+ case FB_BLANK_NORMAL:
+ if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
+ fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
+ for (i = 0; i < fbi->palette_size; i++)
+ sa1100fb_setpalettereg(i, 0, 0, 0, 0, info);
+ sa1100fb_schedule_work(fbi, C_DISABLE);
+ break;
+
+ case FB_BLANK_UNBLANK:
+ if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
+ fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
+ fb_set_cmap(&fbi->fb.cmap, info);
+ sa1100fb_schedule_work(fbi, C_ENABLE);
+ }
+ return 0;
+}
+
+static int sa1100fb_mmap(struct fb_info *info,
+ struct vm_area_struct *vma)
+{
+ struct sa1100fb_info *fbi =
+ container_of(info, struct sa1100fb_info, fb);
+ unsigned long off = vma->vm_pgoff << PAGE_SHIFT;
+
+ if (off < info->fix.smem_len) {
+ vma->vm_pgoff += 1; /* skip over the palette */
+ return dma_mmap_writecombine(fbi->dev, vma, fbi->map_cpu,
+ fbi->map_dma, fbi->map_size);
+ }
+
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+ return vm_iomap_memory(vma, info->fix.mmio_start, info->fix.mmio_len);
+}
+
+static struct fb_ops sa1100fb_ops = {
+ .owner = THIS_MODULE,
+ .fb_check_var = sa1100fb_check_var,
+ .fb_set_par = sa1100fb_set_par,
+// .fb_set_cmap = sa1100fb_set_cmap,
+ .fb_setcolreg = sa1100fb_setcolreg,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+ .fb_blank = sa1100fb_blank,
+ .fb_mmap = sa1100fb_mmap,
+};
+
+/*
+ * Calculate the PCD value from the clock rate (in picoseconds).
+ * We take account of the PPCR clock setting.
+ */
+static inline unsigned int get_pcd(struct sa1100fb_info *fbi,
+ unsigned int pixclock)
+{
+ unsigned int pcd = clk_get_rate(fbi->clk) / 100 / 1000;
+
+ pcd *= pixclock;
+ pcd /= 10000000;
+
+ return pcd + 1; /* make up for integer math truncations */
+}
+
+/*
+ * sa1100fb_activate_var():
+ * Configures LCD Controller based on entries in var parameter. Settings are
+ * only written to the controller if changes were made.
+ */
+static int sa1100fb_activate_var(struct fb_var_screeninfo *var, struct sa1100fb_info *fbi)
+{
+ struct sa1100fb_lcd_reg new_regs;
+ u_int half_screen_size, yres, pcd;
+ u_long flags;
+
+ dev_dbg(fbi->dev, "Configuring SA1100 LCD\n");
+
+ dev_dbg(fbi->dev, "var: xres=%d hslen=%d lm=%d rm=%d\n",
+ var->xres, var->hsync_len,
+ var->left_margin, var->right_margin);
+ dev_dbg(fbi->dev, "var: yres=%d vslen=%d um=%d bm=%d\n",
+ var->yres, var->vsync_len,
+ var->upper_margin, var->lower_margin);
+
+#if DEBUG_VAR
+ if (var->xres < 16 || var->xres > 1024)
+ dev_err(fbi->dev, "%s: invalid xres %d\n",
+ fbi->fb.fix.id, var->xres);
+ if (var->hsync_len < 1 || var->hsync_len > 64)
+ dev_err(fbi->dev, "%s: invalid hsync_len %d\n",
+ fbi->fb.fix.id, var->hsync_len);
+ if (var->left_margin < 1 || var->left_margin > 255)
+ dev_err(fbi->dev, "%s: invalid left_margin %d\n",
+ fbi->fb.fix.id, var->left_margin);
+ if (var->right_margin < 1 || var->right_margin > 255)
+ dev_err(fbi->dev, "%s: invalid right_margin %d\n",
+ fbi->fb.fix.id, var->right_margin);
+ if (var->yres < 1 || var->yres > 1024)
+ dev_err(fbi->dev, "%s: invalid yres %d\n",
+ fbi->fb.fix.id, var->yres);
+ if (var->vsync_len < 1 || var->vsync_len > 64)
+ dev_err(fbi->dev, "%s: invalid vsync_len %d\n",
+ fbi->fb.fix.id, var->vsync_len);
+ if (var->upper_margin < 0 || var->upper_margin > 255)
+ dev_err(fbi->dev, "%s: invalid upper_margin %d\n",
+ fbi->fb.fix.id, var->upper_margin);
+ if (var->lower_margin < 0 || var->lower_margin > 255)
+ dev_err(fbi->dev, "%s: invalid lower_margin %d\n",
+ fbi->fb.fix.id, var->lower_margin);
+#endif
+
+ new_regs.lccr0 = fbi->inf->lccr0 |
+ LCCR0_LEN | LCCR0_LDM | LCCR0_BAM |
+ LCCR0_ERM | LCCR0_LtlEnd | LCCR0_DMADel(0);
+
+ new_regs.lccr1 =
+ LCCR1_DisWdth(var->xres) +
+ LCCR1_HorSnchWdth(var->hsync_len) +
+ LCCR1_BegLnDel(var->left_margin) +
+ LCCR1_EndLnDel(var->right_margin);
+
+ /*
+ * If we have a dual scan LCD, then we need to halve
+ * the YRES parameter.
+ */
+ yres = var->yres;
+ if (fbi->inf->lccr0 & LCCR0_Dual)
+ yres /= 2;
+
+ new_regs.lccr2 =
+ LCCR2_DisHght(yres) +
+ LCCR2_VrtSnchWdth(var->vsync_len) +
+ LCCR2_BegFrmDel(var->upper_margin) +
+ LCCR2_EndFrmDel(var->lower_margin);
+
+ pcd = get_pcd(fbi, var->pixclock);
+ new_regs.lccr3 = LCCR3_PixClkDiv(pcd) | fbi->inf->lccr3 |
+ (var->sync & FB_SYNC_HOR_HIGH_ACT ? LCCR3_HorSnchH : LCCR3_HorSnchL) |
+ (var->sync & FB_SYNC_VERT_HIGH_ACT ? LCCR3_VrtSnchH : LCCR3_VrtSnchL);
+
+ dev_dbg(fbi->dev, "nlccr0 = 0x%08lx\n", new_regs.lccr0);
+ dev_dbg(fbi->dev, "nlccr1 = 0x%08lx\n", new_regs.lccr1);
+ dev_dbg(fbi->dev, "nlccr2 = 0x%08lx\n", new_regs.lccr2);
+ dev_dbg(fbi->dev, "nlccr3 = 0x%08lx\n", new_regs.lccr3);
+
+ half_screen_size = var->bits_per_pixel;
+ half_screen_size = half_screen_size * var->xres * var->yres / 16;
+
+ /* Update shadow copy atomically */
+ local_irq_save(flags);
+ fbi->dbar1 = fbi->palette_dma;
+ fbi->dbar2 = fbi->screen_dma + half_screen_size;
+
+ fbi->reg_lccr0 = new_regs.lccr0;
+ fbi->reg_lccr1 = new_regs.lccr1;
+ fbi->reg_lccr2 = new_regs.lccr2;
+ fbi->reg_lccr3 = new_regs.lccr3;
+ local_irq_restore(flags);
+
+ /*
+ * Only update the registers if the controller is enabled
+ * and something has changed.
+ */
+ if (readl_relaxed(fbi->base + LCCR0) != fbi->reg_lccr0 ||
+ readl_relaxed(fbi->base + LCCR1) != fbi->reg_lccr1 ||
+ readl_relaxed(fbi->base + LCCR2) != fbi->reg_lccr2 ||
+ readl_relaxed(fbi->base + LCCR3) != fbi->reg_lccr3 ||
+ readl_relaxed(fbi->base + DBAR1) != fbi->dbar1 ||
+ readl_relaxed(fbi->base + DBAR2) != fbi->dbar2)
+ sa1100fb_schedule_work(fbi, C_REENABLE);
+
+ return 0;
+}
+
+/*
+ * NOTE! The following functions are purely helpers for set_ctrlr_state.
+ * Do not call them directly; set_ctrlr_state does the correct serialisation
+ * to ensure that things happen in the right way 100% of time time.
+ * -- rmk
+ */
+static inline void __sa1100fb_backlight_power(struct sa1100fb_info *fbi, int on)
+{
+ dev_dbg(fbi->dev, "backlight o%s\n", on ? "n" : "ff");
+
+ if (fbi->inf->backlight_power)
+ fbi->inf->backlight_power(on);
+}
+
+static inline void __sa1100fb_lcd_power(struct sa1100fb_info *fbi, int on)
+{
+ dev_dbg(fbi->dev, "LCD power o%s\n", on ? "n" : "ff");
+
+ if (fbi->inf->lcd_power)
+ fbi->inf->lcd_power(on);
+}
+
+static void sa1100fb_setup_gpio(struct sa1100fb_info *fbi)
+{
+ u_int mask = 0;
+
+ /*
+ * Enable GPIO<9:2> for LCD use if:
+ * 1. Active display, or
+ * 2. Color Dual Passive display
+ *
+ * see table 11.8 on page 11-27 in the SA1100 manual
+ * -- Erik.
+ *
+ * SA1110 spec update nr. 25 says we can and should
+ * clear LDD15 to 12 for 4 or 8bpp modes with active
+ * panels.
+ */
+ if ((fbi->reg_lccr0 & LCCR0_CMS) == LCCR0_Color &&
+ (fbi->reg_lccr0 & (LCCR0_Dual|LCCR0_Act)) != 0) {
+ mask = GPIO_LDD11 | GPIO_LDD10 | GPIO_LDD9 | GPIO_LDD8;
+
+ if (fbi->fb.var.bits_per_pixel > 8 ||
+ (fbi->reg_lccr0 & (LCCR0_Dual|LCCR0_Act)) == LCCR0_Dual)
+ mask |= GPIO_LDD15 | GPIO_LDD14 | GPIO_LDD13 | GPIO_LDD12;
+
+ }
+
+ if (mask) {
+ unsigned long flags;
+
+ /*
+ * SA-1100 requires the GPIO direction register set
+ * appropriately for the alternate function. Hence
+ * we set it here via bitmask rather than excessive
+ * fiddling via the GPIO subsystem - and even then
+ * we'll still have to deal with GAFR.
+ */
+ local_irq_save(flags);
+ GPDR |= mask;
+ GAFR |= mask;
+ local_irq_restore(flags);
+ }
+}
+
+static void sa1100fb_enable_controller(struct sa1100fb_info *fbi)
+{
+ dev_dbg(fbi->dev, "Enabling LCD controller\n");
+
+ /*
+ * Make sure the mode bits are present in the first palette entry
+ */
+ fbi->palette_cpu[0] &= 0xcfff;
+ fbi->palette_cpu[0] |= palette_pbs(&fbi->fb.var);
+
+ /* enable LCD controller clock */
+ clk_prepare_enable(fbi->clk);
+
+ /* Sequence from 11.7.10 */
+ writel_relaxed(fbi->reg_lccr3, fbi->base + LCCR3);
+ writel_relaxed(fbi->reg_lccr2, fbi->base + LCCR2);
+ writel_relaxed(fbi->reg_lccr1, fbi->base + LCCR1);
+ writel_relaxed(fbi->reg_lccr0 & ~LCCR0_LEN, fbi->base + LCCR0);
+ writel_relaxed(fbi->dbar1, fbi->base + DBAR1);
+ writel_relaxed(fbi->dbar2, fbi->base + DBAR2);
+ writel_relaxed(fbi->reg_lccr0 | LCCR0_LEN, fbi->base + LCCR0);
+
+ if (machine_is_shannon())
+ gpio_set_value(SHANNON_GPIO_DISP_EN, 1);
+
+ dev_dbg(fbi->dev, "DBAR1: 0x%08x\n", readl_relaxed(fbi->base + DBAR1));
+ dev_dbg(fbi->dev, "DBAR2: 0x%08x\n", readl_relaxed(fbi->base + DBAR2));
+ dev_dbg(fbi->dev, "LCCR0: 0x%08x\n", readl_relaxed(fbi->base + LCCR0));
+ dev_dbg(fbi->dev, "LCCR1: 0x%08x\n", readl_relaxed(fbi->base + LCCR1));
+ dev_dbg(fbi->dev, "LCCR2: 0x%08x\n", readl_relaxed(fbi->base + LCCR2));
+ dev_dbg(fbi->dev, "LCCR3: 0x%08x\n", readl_relaxed(fbi->base + LCCR3));
+}
+
+static void sa1100fb_disable_controller(struct sa1100fb_info *fbi)
+{
+ DECLARE_WAITQUEUE(wait, current);
+ u32 lccr0;
+
+ dev_dbg(fbi->dev, "Disabling LCD controller\n");
+
+ if (machine_is_shannon())
+ gpio_set_value(SHANNON_GPIO_DISP_EN, 0);
+
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ add_wait_queue(&fbi->ctrlr_wait, &wait);
+
+ /* Clear LCD Status Register */
+ writel_relaxed(~0, fbi->base + LCSR);
+
+ lccr0 = readl_relaxed(fbi->base + LCCR0);
+ lccr0 &= ~LCCR0_LDM; /* Enable LCD Disable Done Interrupt */
+ writel_relaxed(lccr0, fbi->base + LCCR0);
+ lccr0 &= ~LCCR0_LEN; /* Disable LCD Controller */
+ writel_relaxed(lccr0, fbi->base + LCCR0);
+
+ schedule_timeout(20 * HZ / 1000);
+ remove_wait_queue(&fbi->ctrlr_wait, &wait);
+
+ /* disable LCD controller clock */
+ clk_disable_unprepare(fbi->clk);
+}
+
+/*
+ * sa1100fb_handle_irq: Handle 'LCD DONE' interrupts.
+ */
+static irqreturn_t sa1100fb_handle_irq(int irq, void *dev_id)
+{
+ struct sa1100fb_info *fbi = dev_id;
+ unsigned int lcsr = readl_relaxed(fbi->base + LCSR);
+
+ if (lcsr & LCSR_LDD) {
+ u32 lccr0 = readl_relaxed(fbi->base + LCCR0) | LCCR0_LDM;
+ writel_relaxed(lccr0, fbi->base + LCCR0);
+ wake_up(&fbi->ctrlr_wait);
+ }
+
+ writel_relaxed(lcsr, fbi->base + LCSR);
+ return IRQ_HANDLED;
+}
+
+/*
+ * This function must be called from task context only, since it will
+ * sleep when disabling the LCD controller, or if we get two contending
+ * processes trying to alter state.
+ */
+static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state)
+{
+ u_int old_state;
+
+ mutex_lock(&fbi->ctrlr_lock);
+
+ old_state = fbi->state;
+
+ /*
+ * Hack around fbcon initialisation.
+ */
+ if (old_state == C_STARTUP && state == C_REENABLE)
+ state = C_ENABLE;
+
+ switch (state) {
+ case C_DISABLE_CLKCHANGE:
+ /*
+ * Disable controller for clock change. If the
+ * controller is already disabled, then do nothing.
+ */
+ if (old_state != C_DISABLE && old_state != C_DISABLE_PM) {
+ fbi->state = state;
+ sa1100fb_disable_controller(fbi);
+ }
+ break;
+
+ case C_DISABLE_PM:
+ case C_DISABLE:
+ /*
+ * Disable controller
+ */
+ if (old_state != C_DISABLE) {
+ fbi->state = state;
+
+ __sa1100fb_backlight_power(fbi, 0);
+ if (old_state != C_DISABLE_CLKCHANGE)
+ sa1100fb_disable_controller(fbi);
+ __sa1100fb_lcd_power(fbi, 0);
+ }
+ break;
+
+ case C_ENABLE_CLKCHANGE:
+ /*
+ * Enable the controller after clock change. Only
+ * do this if we were disabled for the clock change.
+ */
+ if (old_state == C_DISABLE_CLKCHANGE) {
+ fbi->state = C_ENABLE;
+ sa1100fb_enable_controller(fbi);
+ }
+ break;
+
+ case C_REENABLE:
+ /*
+ * Re-enable the controller only if it was already
+ * enabled. This is so we reprogram the control
+ * registers.
+ */
+ if (old_state == C_ENABLE) {
+ sa1100fb_disable_controller(fbi);
+ sa1100fb_setup_gpio(fbi);
+ sa1100fb_enable_controller(fbi);
+ }
+ break;
+
+ case C_ENABLE_PM:
+ /*
+ * Re-enable the controller after PM. This is not
+ * perfect - think about the case where we were doing
+ * a clock change, and we suspended half-way through.
+ */
+ if (old_state != C_DISABLE_PM)
+ break;
+ /* fall through */
+
+ case C_ENABLE:
+ /*
+ * Power up the LCD screen, enable controller, and
+ * turn on the backlight.
+ */
+ if (old_state != C_ENABLE) {
+ fbi->state = C_ENABLE;
+ sa1100fb_setup_gpio(fbi);
+ __sa1100fb_lcd_power(fbi, 1);
+ sa1100fb_enable_controller(fbi);
+ __sa1100fb_backlight_power(fbi, 1);
+ }
+ break;
+ }
+ mutex_unlock(&fbi->ctrlr_lock);
+}
+
+/*
+ * Our LCD controller task (which is called when we blank or unblank)
+ * via keventd.
+ */
+static void sa1100fb_task(struct work_struct *w)
+{
+ struct sa1100fb_info *fbi = container_of(w, struct sa1100fb_info, task);
+ u_int state = xchg(&fbi->task_state, -1);
+
+ set_ctrlr_state(fbi, state);
+}
+
+#ifdef CONFIG_CPU_FREQ
+/*
+ * Calculate the minimum DMA period over all displays that we own.
+ * This, together with the SDRAM bandwidth defines the slowest CPU
+ * frequency that can be selected.
+ */
+static unsigned int sa1100fb_min_dma_period(struct sa1100fb_info *fbi)
+{
+#if 0
+ unsigned int min_period = (unsigned int)-1;
+ int i;
+
+ for (i = 0; i < MAX_NR_CONSOLES; i++) {
+ struct display *disp = &fb_display[i];
+ unsigned int period;
+
+ /*
+ * Do we own this display?
+ */
+ if (disp->fb_info != &fbi->fb)
+ continue;
+
+ /*
+ * Ok, calculate its DMA period
+ */
+ period = sa1100fb_display_dma_period(&disp->var);
+ if (period < min_period)
+ min_period = period;
+ }
+
+ return min_period;
+#else
+ /*
+ * FIXME: we need to verify _all_ consoles.
+ */
+ return sa1100fb_display_dma_period(&fbi->fb.var);
+#endif
+}
+
+/*
+ * CPU clock speed change handler. We need to adjust the LCD timing
+ * parameters when the CPU clock is adjusted by the power management
+ * subsystem.
+ */
+static int
+sa1100fb_freq_transition(struct notifier_block *nb, unsigned long val,
+ void *data)
+{
+ struct sa1100fb_info *fbi = TO_INF(nb, freq_transition);
+ u_int pcd;
+
+ switch (val) {
+ case CPUFREQ_PRECHANGE:
+ set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
+ break;
+
+ case CPUFREQ_POSTCHANGE:
+ pcd = get_pcd(fbi, fbi->fb.var.pixclock);
+ fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) | LCCR3_PixClkDiv(pcd);
+ set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE);
+ break;
+ }
+ return 0;
+}
+
+static int
+sa1100fb_freq_policy(struct notifier_block *nb, unsigned long val,
+ void *data)
+{
+ struct sa1100fb_info *fbi = TO_INF(nb, freq_policy);
+ struct cpufreq_policy *policy = data;
+
+ switch (val) {
+ case CPUFREQ_ADJUST:
+ case CPUFREQ_INCOMPATIBLE:
+ dev_dbg(fbi->dev, "min dma period: %d ps, "
+ "new clock %d kHz\n", sa1100fb_min_dma_period(fbi),
+ policy->max);
+ /* todo: fill in min/max values */
+ break;
+ case CPUFREQ_NOTIFY:
+ do {} while(0);
+ /* todo: panic if min/max values aren't fulfilled
+ * [can't really happen unless there's a bug in the
+ * CPU policy verififcation process *
+ */
+ break;
+ }
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM
+/*
+ * Power management hooks. Note that we won't be called from IRQ context,
+ * unlike the blank functions above, so we may sleep.
+ */
+static int sa1100fb_suspend(struct platform_device *dev, pm_message_t state)
+{
+ struct sa1100fb_info *fbi = platform_get_drvdata(dev);
+
+ set_ctrlr_state(fbi, C_DISABLE_PM);
+ return 0;
+}
+
+static int sa1100fb_resume(struct platform_device *dev)
+{
+ struct sa1100fb_info *fbi = platform_get_drvdata(dev);
+
+ set_ctrlr_state(fbi, C_ENABLE_PM);
+ return 0;
+}
+#else
+#define sa1100fb_suspend NULL
+#define sa1100fb_resume NULL
+#endif
+
+/*
+ * sa1100fb_map_video_memory():
+ * Allocates the DRAM memory for the frame buffer. This buffer is
+ * remapped into a non-cached, non-buffered, memory region to
+ * allow palette and pixel writes to occur without flushing the
+ * cache. Once this area is remapped, all virtual memory
+ * access to the video memory should occur at the new region.
+ */
+static int sa1100fb_map_video_memory(struct sa1100fb_info *fbi)
+{
+ /*
+ * We reserve one page for the palette, plus the size
+ * of the framebuffer.
+ */
+ fbi->map_size = PAGE_ALIGN(fbi->fb.fix.smem_len + PAGE_SIZE);
+ fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
+ &fbi->map_dma, GFP_KERNEL);
+
+ if (fbi->map_cpu) {
+ fbi->fb.screen_base = fbi->map_cpu + PAGE_SIZE;
+ fbi->screen_dma = fbi->map_dma + PAGE_SIZE;
+ /*
+ * FIXME: this is actually the wrong thing to place in
+ * smem_start. But fbdev suffers from the problem that
+ * it needs an API which doesn't exist (in this case,
+ * dma_writecombine_mmap)
+ */
+ fbi->fb.fix.smem_start = fbi->screen_dma;
+ }
+
+ return fbi->map_cpu ? 0 : -ENOMEM;
+}
+
+/* Fake monspecs to fill in fbinfo structure */
+static struct fb_monspecs monspecs = {
+ .hfmin = 30000,
+ .hfmax = 70000,
+ .vfmin = 50,
+ .vfmax = 65,
+};
+
+
+static struct sa1100fb_info *sa1100fb_init_fbinfo(struct device *dev)
+{
+ struct sa1100fb_mach_info *inf = dev_get_platdata(dev);
+ struct sa1100fb_info *fbi;
+ unsigned i;
+
+ fbi = kmalloc(sizeof(struct sa1100fb_info) + sizeof(u32) * 16,
+ GFP_KERNEL);
+ if (!fbi)
+ return NULL;
+
+ memset(fbi, 0, sizeof(struct sa1100fb_info));
+ fbi->dev = dev;
+
+ strcpy(fbi->fb.fix.id, SA1100_NAME);
+
+ fbi->fb.fix.type = FB_TYPE_PACKED_PIXELS;
+ fbi->fb.fix.type_aux = 0;
+ fbi->fb.fix.xpanstep = 0;
+ fbi->fb.fix.ypanstep = 0;
+ fbi->fb.fix.ywrapstep = 0;
+ fbi->fb.fix.accel = FB_ACCEL_NONE;
+
+ fbi->fb.var.nonstd = 0;
+ fbi->fb.var.activate = FB_ACTIVATE_NOW;
+ fbi->fb.var.height = -1;
+ fbi->fb.var.width = -1;
+ fbi->fb.var.accel_flags = 0;
+ fbi->fb.var.vmode = FB_VMODE_NONINTERLACED;
+
+ fbi->fb.fbops = &sa1100fb_ops;
+ fbi->fb.flags = FBINFO_DEFAULT;
+ fbi->fb.monspecs = monspecs;
+ fbi->fb.pseudo_palette = (fbi + 1);
+
+ fbi->rgb[RGB_4] = &rgb_4;
+ fbi->rgb[RGB_8] = &rgb_8;
+ fbi->rgb[RGB_16] = &def_rgb_16;
+
+ /*
+ * People just don't seem to get this. We don't support
+ * anything but correct entries now, so panic if someone
+ * does something stupid.
+ */
+ if (inf->lccr3 & (LCCR3_VrtSnchL|LCCR3_HorSnchL|0xff) ||
+ inf->pixclock == 0)
+ panic("sa1100fb error: invalid LCCR3 fields set or zero "
+ "pixclock.");
+
+ fbi->fb.var.xres = inf->xres;
+ fbi->fb.var.xres_virtual = inf->xres;
+ fbi->fb.var.yres = inf->yres;
+ fbi->fb.var.yres_virtual = inf->yres;
+ fbi->fb.var.bits_per_pixel = inf->bpp;
+ fbi->fb.var.pixclock = inf->pixclock;
+ fbi->fb.var.hsync_len = inf->hsync_len;
+ fbi->fb.var.left_margin = inf->left_margin;
+ fbi->fb.var.right_margin = inf->right_margin;
+ fbi->fb.var.vsync_len = inf->vsync_len;
+ fbi->fb.var.upper_margin = inf->upper_margin;
+ fbi->fb.var.lower_margin = inf->lower_margin;
+ fbi->fb.var.sync = inf->sync;
+ fbi->fb.var.grayscale = inf->cmap_greyscale;
+ fbi->state = C_STARTUP;
+ fbi->task_state = (u_char)-1;
+ fbi->fb.fix.smem_len = inf->xres * inf->yres *
+ inf->bpp / 8;
+ fbi->inf = inf;
+
+ /* Copy the RGB bitfield overrides */
+ for (i = 0; i < NR_RGB; i++)
+ if (inf->rgb[i])
+ fbi->rgb[i] = inf->rgb[i];
+
+ init_waitqueue_head(&fbi->ctrlr_wait);
+ INIT_WORK(&fbi->task, sa1100fb_task);
+ mutex_init(&fbi->ctrlr_lock);
+
+ return fbi;
+}
+
+static int sa1100fb_probe(struct platform_device *pdev)
+{
+ struct sa1100fb_info *fbi;
+ struct resource *res;
+ int ret, irq;
+
+ if (!dev_get_platdata(&pdev->dev)) {
+ dev_err(&pdev->dev, "no platform LCD data\n");
+ return -EINVAL;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0 || !res)
+ return -EINVAL;
+
+ if (!request_mem_region(res->start, resource_size(res), "LCD"))
+ return -EBUSY;
+
+ fbi = sa1100fb_init_fbinfo(&pdev->dev);
+ ret = -ENOMEM;
+ if (!fbi)
+ goto failed;
+
+ fbi->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(fbi->clk)) {
+ ret = PTR_ERR(fbi->clk);
+ fbi->clk = NULL;
+ goto failed;
+ }
+
+ fbi->base = ioremap(res->start, resource_size(res));
+ if (!fbi->base)
+ goto failed;
+
+ /* Initialize video memory */
+ ret = sa1100fb_map_video_memory(fbi);
+ if (ret)
+ goto failed;
+
+ ret = request_irq(irq, sa1100fb_handle_irq, 0, "LCD", fbi);
+ if (ret) {
+ dev_err(&pdev->dev, "request_irq failed: %d\n", ret);
+ goto failed;
+ }
+
+ if (machine_is_shannon()) {
+ ret = gpio_request_one(SHANNON_GPIO_DISP_EN,
+ GPIOF_OUT_INIT_LOW, "display enable");
+ if (ret)
+ goto err_free_irq;
+ }
+
+ /*
+ * This makes sure that our colour bitfield
+ * descriptors are correctly initialised.
+ */
+ sa1100fb_check_var(&fbi->fb.var, &fbi->fb);
+
+ platform_set_drvdata(pdev, fbi);
+
+ ret = register_framebuffer(&fbi->fb);
+ if (ret < 0)
+ goto err_reg_fb;
+
+#ifdef CONFIG_CPU_FREQ
+ fbi->freq_transition.notifier_call = sa1100fb_freq_transition;
+ fbi->freq_policy.notifier_call = sa1100fb_freq_policy;
+ cpufreq_register_notifier(&fbi->freq_transition, CPUFREQ_TRANSITION_NOTIFIER);
+ cpufreq_register_notifier(&fbi->freq_policy, CPUFREQ_POLICY_NOTIFIER);
+#endif
+
+ /* This driver cannot be unloaded at the moment */
+ return 0;
+
+ err_reg_fb:
+ if (machine_is_shannon())
+ gpio_free(SHANNON_GPIO_DISP_EN);
+ err_free_irq:
+ free_irq(irq, fbi);
+ failed:
+ if (fbi)
+ iounmap(fbi->base);
+ if (fbi->clk)
+ clk_put(fbi->clk);
+ kfree(fbi);
+ release_mem_region(res->start, resource_size(res));
+ return ret;
+}
+
+static struct platform_driver sa1100fb_driver = {
+ .probe = sa1100fb_probe,
+ .suspend = sa1100fb_suspend,
+ .resume = sa1100fb_resume,
+ .driver = {
+ .name = "sa11x0-fb",
+ },
+};
+
+int __init sa1100fb_init(void)
+{
+ if (fb_get_options("sa1100fb", NULL))
+ return -ENODEV;
+
+ return platform_driver_register(&sa1100fb_driver);
+}
+
+int __init sa1100fb_setup(char *options)
+{
+#if 0
+ char *this_opt;
+
+ if (!options || !*options)
+ return 0;
+
+ while ((this_opt = strsep(&options, ",")) != NULL) {
+
+ if (!strncmp(this_opt, "bpp:", 4))
+ current_par.max_bpp =
+ simple_strtoul(this_opt + 4, NULL, 0);
+
+ if (!strncmp(this_opt, "lccr0:", 6))
+ lcd_shadow.lccr0 =
+ simple_strtoul(this_opt + 6, NULL, 0);
+ if (!strncmp(this_opt, "lccr1:", 6)) {
+ lcd_shadow.lccr1 =
+ simple_strtoul(this_opt + 6, NULL, 0);
+ current_par.max_xres =
+ (lcd_shadow.lccr1 & 0x3ff) + 16;
+ }
+ if (!strncmp(this_opt, "lccr2:", 6)) {
+ lcd_shadow.lccr2 =
+ simple_strtoul(this_opt + 6, NULL, 0);
+ current_par.max_yres =
+ (lcd_shadow.
+ lccr0 & LCCR0_SDS) ? ((lcd_shadow.
+ lccr2 & 0x3ff) +
+ 1) *
+ 2 : ((lcd_shadow.lccr2 & 0x3ff) + 1);
+ }
+ if (!strncmp(this_opt, "lccr3:", 6))
+ lcd_shadow.lccr3 =
+ simple_strtoul(this_opt + 6, NULL, 0);
+ }
+#endif
+ return 0;
+}
+
+module_init(sa1100fb_init);
+MODULE_DESCRIPTION("StrongARM-1100/1110 framebuffer driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff