/*
 *  linux/drivers/video/clps711xfb.c
 *
 *  Copyright (C) 2000-2001 Deep Blue Solutions Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Framebuffer driver for the CLPS7111 and EP7212 processors.
 */
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/platform_device.h>

#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <linux/uaccess.h>

struct fb_info	*cfb;

#define CMAP_MAX_SIZE	16

/*
 * LCD AC Prescale.  This comes from the LCD panel manufacturers specifications.
 * This determines how many clocks + 1 of CL1 before the M signal toggles.
 * The number of lines on the display must not be divisible by this number.
 */
static unsigned int lcd_ac_prescale = 13;

/*
 *    Set a single color register. Return != 0 for invalid regno.
 */
static int
clps7111fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
		     u_int transp, struct fb_info *info)
{
	unsigned int level, mask, shift, pal;

	if (regno >= (1 << info->var.bits_per_pixel))
		return 1;

	/* gray = 0.30*R + 0.58*G + 0.11*B */
	level = (red * 77 + green * 151 + blue * 28) >> 20;

	/*
	 * On an LCD, a high value is dark, while a low value is light. 
	 * So we invert the level.
	 *
	 * This isn't true on all machines, so we only do it on EDB7211.
	 *  --rmk
	 */
	if (machine_is_edb7211()) {
		level = 15 - level;
	}

	shift = 4 * (regno & 7);
	level <<= shift;
	mask  = 15 << shift;
	level &= mask;

	regno = regno < 8 ? PALLSW : PALMSW;

	pal = clps_readl(regno);
	pal = (pal & ~mask) | level;
	clps_writel(pal, regno);

	return 0;
}

/*
 * Validate the purposed mode.
 */	
static int
clps7111fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
	var->transp.msb_right	= 0;
	var->transp.offset	= 0;
	var->transp.length	= 0;
	var->red.msb_right	= 0;
	var->red.offset		= 0;
	var->red.length		= var->bits_per_pixel;
	var->green		= var->red;
	var->blue		= var->red;

	if (var->bits_per_pixel > 4) 
		return -EINVAL;

	return 0;
}

/*
 * Set the hardware state.
 */ 
static int 
clps7111fb_set_par(struct fb_info *info)
{
	unsigned int lcdcon, syscon, pixclock;

	switch (info->var.bits_per_pixel) {
	case 1:
		info->fix.visual = FB_VISUAL_MONO01;
		break;
	case 2:
		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
		break;
	case 4:
		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
		break;
	}

	info->fix.line_length = info->var.xres_virtual * info->var.bits_per_pixel / 8;

	lcdcon = (info->var.xres_virtual * info->var.yres_virtual * info->var.bits_per_pixel) / 128 - 1;
	lcdcon |= ((info->var.xres_virtual / 16) - 1) << 13;
	lcdcon |= lcd_ac_prescale << 25;

	/*
	 * Calculate pixel prescale value from the pixclock.  This is:
	 *  36.864MHz / pixclock_mhz - 1.
	 * However, pixclock is in picoseconds, so this ends up being:
	 *  36864000 * pixclock_ps / 10^12 - 1
	 * and this will overflow the 32-bit math.  We perform this as
	 * (9 * 4096000 == 36864000):
	 *  pixclock_ps * 9 * (4096000 / 10^12) - 1
	 */
	pixclock = 9 * info->var.pixclock / 244140 - 1;
	lcdcon |= pixclock << 19;

	if (info->var.bits_per_pixel == 4)
		lcdcon |= LCDCON_GSMD;
	if (info->var.bits_per_pixel >= 2)
		lcdcon |= LCDCON_GSEN;

	/*
	 * LCDCON must only be changed while the LCD is disabled
	 */
	syscon = clps_readl(SYSCON1);
	clps_writel(syscon & ~SYSCON1_LCDEN, SYSCON1);
	clps_writel(lcdcon, LCDCON);
	clps_writel(syscon | SYSCON1_LCDEN, SYSCON1);
	return 0;
}

static int clps7111fb_blank(int blank, struct fb_info *info)
{
	/* Enable/Disable LCD controller. */
	if (blank)
		clps_writel(clps_readl(SYSCON1) & ~SYSCON1_LCDEN, SYSCON1);
	else
		clps_writel(clps_readl(SYSCON1) | SYSCON1_LCDEN, SYSCON1);

	return 0;
}

static struct fb_ops clps7111fb_ops = {
	.owner		= THIS_MODULE,
	.fb_check_var	= clps7111fb_check_var,
	.fb_set_par	= clps7111fb_set_par,
	.fb_setcolreg	= clps7111fb_setcolreg,
	.fb_blank	= clps7111fb_blank,
	.fb_fillrect	= cfb_fillrect,
	.fb_copyarea	= cfb_copyarea,
	.fb_imageblit	= cfb_imageblit,
};

static void clps711x_guess_lcd_params(struct fb_info *info)
{
	unsigned int lcdcon, syscon, size;
	unsigned long phys_base = PAGE_OFFSET;
	void *virt_base = (void *)PAGE_OFFSET;

	info->var.xres_virtual	 = 640;
	info->var.yres_virtual	 = 240;
	info->var.bits_per_pixel = 4;
	info->var.activate	 = FB_ACTIVATE_NOW;
	info->var.height	 = -1;
	info->var.width		 = -1;
	info->var.pixclock	 = 93006; /* 10.752MHz pixel clock */

	/*
	 * If the LCD controller is already running, decode the values
	 * in LCDCON to xres/yres/bpp/pixclock/acprescale
	 */
	syscon = clps_readl(SYSCON1);
	if (syscon & SYSCON1_LCDEN) {
		lcdcon = clps_readl(LCDCON);

		/*
		 * Decode GSMD and GSEN bits to bits per pixel
		 */
		switch (lcdcon & (LCDCON_GSMD | LCDCON_GSEN)) {
		case LCDCON_GSMD | LCDCON_GSEN:
			info->var.bits_per_pixel = 4;
			break;

		case LCDCON_GSEN:
			info->var.bits_per_pixel = 2;
			break;

		default:
			info->var.bits_per_pixel = 1;
			break;
		}

		/*
		 * Decode xres/yres
		 */
		info->var.xres_virtual = (((lcdcon >> 13) & 0x3f) + 1) * 16;
		info->var.yres_virtual = (((lcdcon & 0x1fff) + 1) * 128) /
					  (info->var.xres_virtual *
					   info->var.bits_per_pixel);

		/*
		 * Calculate pixclock
		 */
		info->var.pixclock = (((lcdcon >> 19) & 0x3f) + 1) * 244140 / 9;

		/*
		 * Grab AC prescale
		 */
		lcd_ac_prescale = (lcdcon >> 25) & 0x1f;
	}

	info->var.xres = info->var.xres_virtual;
	info->var.yres = info->var.yres_virtual;
	info->var.grayscale = info->var.bits_per_pixel > 1;

	size = info->var.xres * info->var.yres * info->var.bits_per_pixel / 8;

	/*
	 * Might be worth checking to see if we can use the on-board
	 * RAM if size here...
	 * CLPS7110 - no on-board SRAM
	 * EP7212   - 38400 bytes
	 */
	if (size <= 38400) {
		printk(KERN_INFO "CLPS711xFB: could use on-board SRAM?\n");
	}

	if ((syscon & SYSCON1_LCDEN) == 0) {
		/*
		 * The display isn't running.  Ensure that
		 * the display memory is empty.
		 */
		memset(virt_base, 0, size);
	}

	info->screen_base    = virt_base;
	info->fix.smem_start = phys_base;
	info->fix.smem_len   = PAGE_ALIGN(size);
	info->fix.type       = FB_TYPE_PACKED_PIXELS;
}

static int clps711x_fb_probe(struct platform_device *pdev)
{
	int err = -ENOMEM;

	if (fb_get_options("clps711xfb", NULL))
		return -ENODEV;

	cfb = kzalloc(sizeof(*cfb), GFP_KERNEL);
	if (!cfb)
		goto out;

	strcpy(cfb->fix.id, "clps711x");

	cfb->fbops		= &clps7111fb_ops;
	cfb->flags		= FBINFO_DEFAULT;

	clps711x_guess_lcd_params(cfb);

	fb_alloc_cmap(&cfb->cmap, CMAP_MAX_SIZE, 0);

	err = register_framebuffer(cfb);

out:	return err;
}

static int clps711x_fb_remove(struct platform_device *pdev)
{
	unregister_framebuffer(cfb);
	kfree(cfb);

	return 0;
}

static struct platform_driver clps711x_fb_driver = {
	.driver	= {
		.name	= "video-clps711x",
	},
	.probe	= clps711x_fb_probe,
	.remove	= clps711x_fb_remove,
};
module_platform_driver(clps711x_fb_driver);

MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
MODULE_DESCRIPTION("CLPS711X framebuffer driver");
MODULE_LICENSE("GPL");
n.

 8) tcp_fastopen_create_child() needs to setup tp-&gt;max_window, from
    Alexey Kodanev.

 9) Missing kmemdup() failure check in ipv6 segment routing code, from
    Eric Dumazet.

10) Don't execute unix_bind() under the bindlock, otherwise we deadlock
    with splice. From WANG Cong.

11) ip6_tnl_parse_tlv_enc_lim() potentially reallocates the skb buffer,
    therefore callers must reload cached header pointers into that skb.
    Fix from Eric Dumazet.

12) Fix various bugs in legacy IRQ fallback handling in alx driver, from
    Tobias Regnery.

13) Do not allow lwtunnel drivers to be unloaded while they are
    referenced by active instances, from Robert Shearman.

14) Fix truncated PHY LED trigger names, from Geert Uytterhoeven.

15) Fix a few regressions from virtio_net XDP support, from John
    Fastabend and Jakub Kicinski.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (102 commits)
  ISDN: eicon: silence misleading array-bounds warning
  net: phy: micrel: add support for KSZ8795
  gtp: fix cross netns recv on gtp socket
  gtp: clear DF bit on GTP packet tx
  gtp: add genl family modules alias
  tcp: don't annotate mark on control socket from tcp_v6_send_response()
  ravb: unmap descriptors when freeing rings
  virtio_net: reject XDP programs using header adjustment
  virtio_net: use dev_kfree_skb for small buffer XDP receive
  r8152: check rx after napi is enabled
  r8152: re-schedule napi for tx
  r8152: avoid start_xmit to schedule napi when napi is disabled
  r8152: avoid start_xmit to call napi_schedule during autosuspend
  net: dsa: Bring back device detaching in dsa_slave_suspend()
  net: phy: leds: Fix truncated LED trigger names
  net: phy: leds: Break dependency of phy.h on phy_led_triggers.h
  net: phy: leds: Clear phy_num_led_triggers on failure to avoid crash
  net-next: ethernet: mediatek: change the compatible string
  Documentation: devicetree: change the mediatek ethernet compatible string
  bnxt_en: Fix RTNL lock usage on bnxt_get_port_module_status().
  ...
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=1b1bc42c1692e9b62756323c675a44cb1a1f9dbd'>Diffstat</a> (limited to 'include/net/caif/cfmuxl.h')</div><table summary='diffstat' class='diffstat'>