fbdev: bfin_adv7393fb: new Blackfin ADV7393 driver

Driver for ADV7393 add-on card for multiple Blackfin boards.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

drivers/video/Kconfig

@@ -657,6 +657,58 @@ config FB_BF537_LQ035
 	  To compile this driver as a module, choose M here: the
 	  module will be called bf537-lq035.
 
+config FB_BFIN_7393
+	tristate "Blackfin ADV7393 Video encoder"
+	depends on FB && BLACKFIN
+	select I2C
+	select FB_CFB_FILLRECT
+	select FB_CFB_COPYAREA
+	select FB_CFB_IMAGEBLIT
+	help
+	  This is the framebuffer device for a ADV7393 video encoder
+	  attached to a Blackfin on the PPI port.
+	  If your Blackfin board has a ADV7393 select Y.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called bfin_adv7393fb.
+
+choice
+	prompt  "Video mode support"
+	depends on FB_BFIN_7393
+	default NTSC
+
+config NTSC
+	bool 'NTSC 720x480'
+
+config PAL
+	bool 'PAL 720x576'
+
+config NTSC_640x480
+	bool 'NTSC 640x480 (Experimental)'
+
+config PAL_640x480
+	bool 'PAL 640x480 (Experimental)'
+
+config NTSC_YCBCR
+	bool 'NTSC 720x480 YCbCR input'
+
+config PAL_YCBCR
+	bool 'PAL 720x576 YCbCR input'
+
+endchoice
+
+choice
+	prompt  "Size of ADV7393 frame buffer memory Single/Double Size"
+	depends on (FB_BFIN_7393)
+	default ADV7393_1XMEM
+
+config ADV7393_1XMEM
+	bool 'Single'
+
+config ADV7393_2XMEM
+	bool 'Double'
+endchoice
+
 config FB_STI
 	tristate "HP STI frame buffer device support"
 	depends on FB && PARISC

drivers/video/Makefile

@@ -148,6 +148,7 @@ obj-$(CONFIG_FB_BF537_LQ035)      += bf537-lq035.o
 obj-$(CONFIG_FB_BF54X_LQ043)	  += bf54x-lq043fb.o
 obj-$(CONFIG_FB_BFIN_LQ035Q1)     += bfin-lq035q1-fb.o
 obj-$(CONFIG_FB_BFIN_T350MCQB)	  += bfin-t350mcqb-fb.o
+obj-$(CONFIG_FB_BFIN_7393)        += bfin_adv7393fb.o
 obj-$(CONFIG_FB_MX3)		  += mx3fb.o
 obj-$(CONFIG_FB_DA8XX)		  += da8xx-fb.o
 

drivers/video/bfin_adv7393fb.c

@@ -0,0 +1,832 @@
+/*
+ * Frame buffer driver for ADV7393/2 video encoder
+ *
+ * Copyright 2006-2009 Analog Devices Inc.
+ * Licensed under the GPL-2 or late.
+ */
+
+/*
+ * TODO: Remove Globals
+ * TODO: Code Cleanup
+ */
+
+#define pr_fmt(fmt) DRIVER_NAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <asm/blackfin.h>
+#include <asm/irq.h>
+#include <asm/dma.h>
+#include <linux/uaccess.h>
+#include <linux/gpio.h>
+#include <asm/portmux.h>
+
+#include <linux/dma-mapping.h>
+#include <linux/proc_fs.h>
+#include <linux/platform_device.h>
+
+#include <linux/i2c.h>
+#include <linux/i2c-dev.h>
+
+#include "bfin_adv7393fb.h"
+
+static int mode = VMODE;
+static int mem = VMEM;
+static int nocursor = 1;
+
+static const unsigned short ppi_pins[] = {
+	P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
+	P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3,
+	P_PPI0_D4, P_PPI0_D5, P_PPI0_D6, P_PPI0_D7,
+	P_PPI0_D8, P_PPI0_D9, P_PPI0_D10, P_PPI0_D11,
+	P_PPI0_D12, P_PPI0_D13, P_PPI0_D14, P_PPI0_D15,
+	0
+};
+
+/*
+ * card parameters
+ */
+
+static struct bfin_adv7393_fb_par {
+	/* structure holding blackfin / adv7393 paramters when
+	   screen is blanked */
+	struct {
+		u8 Mode;	/* ntsc/pal/? */
+	} vga_state;
+	atomic_t ref_count;
+} bfin_par;
+
+/* --------------------------------------------------------------------- */
+
+static struct fb_var_screeninfo bfin_adv7393_fb_defined = {
+	.xres = 720,
+	.yres = 480,
+	.xres_virtual = 720,
+	.yres_virtual = 480,
+	.bits_per_pixel = 16,
+	.activate = FB_ACTIVATE_TEST,
+	.height = -1,
+	.width = -1,
+	.left_margin = 0,
+	.right_margin = 0,
+	.upper_margin = 0,
+	.lower_margin = 0,
+	.vmode = FB_VMODE_INTERLACED,
+	.red = {11, 5, 0},
+	.green = {5, 6, 0},
+	.blue = {0, 5, 0},
+	.transp = {0, 0, 0},
+};
+
+static struct fb_fix_screeninfo bfin_adv7393_fb_fix __devinitdata = {
+	.id = "BFIN ADV7393",
+	.smem_len = 720 * 480 * 2,
+	.type = FB_TYPE_PACKED_PIXELS,
+	.visual = FB_VISUAL_TRUECOLOR,
+	.xpanstep = 0,
+	.ypanstep = 0,
+	.line_length = 720 * 2,
+	.accel = FB_ACCEL_NONE
+};
+
+static struct fb_ops bfin_adv7393_fb_ops = {
+	.owner = THIS_MODULE,
+	.fb_open = bfin_adv7393_fb_open,
+	.fb_release = bfin_adv7393_fb_release,
+	.fb_check_var = bfin_adv7393_fb_check_var,
+	.fb_pan_display = bfin_adv7393_fb_pan_display,
+	.fb_blank = bfin_adv7393_fb_blank,
+	.fb_fillrect = cfb_fillrect,
+	.fb_copyarea = cfb_copyarea,
+	.fb_imageblit = cfb_imageblit,
+	.fb_cursor = bfin_adv7393_fb_cursor,
+	.fb_setcolreg = bfin_adv7393_fb_setcolreg,
+};
+
+static int dma_desc_list(struct adv7393fb_device *fbdev, u16 arg)
+{
+	if (arg == BUILD) {	/* Build */
+		fbdev->vb1 = l1_data_sram_zalloc(sizeof(struct dmasg));
+		if (fbdev->vb1 == NULL)
+			goto error;
+
+		fbdev->av1 = l1_data_sram_zalloc(sizeof(struct dmasg));
+		if (fbdev->av1 == NULL)
+			goto error;
+
+		fbdev->vb2 = l1_data_sram_zalloc(sizeof(struct dmasg));
+		if (fbdev->vb2 == NULL)
+			goto error;
+
+		fbdev->av2 = l1_data_sram_zalloc(sizeof(struct dmasg));
+		if (fbdev->av2 == NULL)
+			goto error;
+
+		/* Build linked DMA descriptor list */
+		fbdev->vb1->next_desc_addr = fbdev->av1;
+		fbdev->av1->next_desc_addr = fbdev->vb2;
+		fbdev->vb2->next_desc_addr = fbdev->av2;
+		fbdev->av2->next_desc_addr = fbdev->vb1;
+
+		/* Save list head */
+		fbdev->descriptor_list_head = fbdev->av2;
+
+		/* Vertical Blanking Field 1 */
+		fbdev->vb1->start_addr = VB_DUMMY_MEMORY_SOURCE;
+		fbdev->vb1->cfg = DMA_CFG_VAL;
+
+		fbdev->vb1->x_count =
+		    fbdev->modes[mode].xres + fbdev->modes[mode].boeft_blank;
+
+		fbdev->vb1->x_modify = 0;
+		fbdev->vb1->y_count = fbdev->modes[mode].vb1_lines;
+		fbdev->vb1->y_modify = 0;
+
+		/* Active Video Field 1 */
+
+		fbdev->av1->start_addr = (unsigned long)fbdev->fb_mem;
+		fbdev->av1->cfg = DMA_CFG_VAL;
+		fbdev->av1->x_count =
+		    fbdev->modes[mode].xres + fbdev->modes[mode].boeft_blank;
+		fbdev->av1->x_modify = fbdev->modes[mode].bpp / 8;
+		fbdev->av1->y_count = fbdev->modes[mode].a_lines;
+		fbdev->av1->y_modify =
+		    (fbdev->modes[mode].xres - fbdev->modes[mode].boeft_blank +
+		     1) * (fbdev->modes[mode].bpp / 8);
+
+		/* Vertical Blanking Field 2 */
+
+		fbdev->vb2->start_addr = VB_DUMMY_MEMORY_SOURCE;
+		fbdev->vb2->cfg = DMA_CFG_VAL;
+		fbdev->vb2->x_count =
+		    fbdev->modes[mode].xres + fbdev->modes[mode].boeft_blank;
+
+		fbdev->vb2->x_modify = 0;
+		fbdev->vb2->y_count = fbdev->modes[mode].vb2_lines;
+		fbdev->vb2->y_modify = 0;
+
+		/* Active Video Field 2 */
+
+		fbdev->av2->start_addr =
+		    (unsigned long)fbdev->fb_mem + fbdev->line_len;
+
+		fbdev->av2->cfg = DMA_CFG_VAL;
+
+		fbdev->av2->x_count =
+		    fbdev->modes[mode].xres + fbdev->modes[mode].boeft_blank;
+
+		fbdev->av2->x_modify = (fbdev->modes[mode].bpp / 8);
+		fbdev->av2->y_count = fbdev->modes[mode].a_lines;
+
+		fbdev->av2->y_modify =
+		    (fbdev->modes[mode].xres - fbdev->modes[mode].boeft_blank +
+		     1) * (fbdev->modes[mode].bpp / 8);
+
+		return 1;
+	}
+
+error:
+	l1_data_sram_free(fbdev->vb1);
+	l1_data_sram_free(fbdev->av1);
+	l1_data_sram_free(fbdev->vb2);
+	l1_data_sram_free(fbdev->av2);
+
+	return 0;
+}
+
+static int bfin_config_dma(struct adv7393fb_device *fbdev)
+{
+	BUG_ON(!(fbdev->fb_mem));
+
+	set_dma_x_count(CH_PPI, fbdev->descriptor_list_head->x_count);
+	set_dma_x_modify(CH_PPI, fbdev->descriptor_list_head->x_modify);
+	set_dma_y_count(CH_PPI, fbdev->descriptor_list_head->y_count);
+	set_dma_y_modify(CH_PPI, fbdev->descriptor_list_head->y_modify);
+	set_dma_start_addr(CH_PPI, fbdev->descriptor_list_head->start_addr);
+	set_dma_next_desc_addr(CH_PPI,
+			       fbdev->descriptor_list_head->next_desc_addr);
+	set_dma_config(CH_PPI, fbdev->descriptor_list_head->cfg);
+
+	return 1;
+}
+
+static void bfin_disable_dma(void)
+{
+	bfin_write_DMA0_CONFIG(bfin_read_DMA0_CONFIG() & ~DMAEN);
+}
+
+static void bfin_config_ppi(struct adv7393fb_device *fbdev)
+{
+	if (ANOMALY_05000183) {
+		bfin_write_TIMER2_CONFIG(WDTH_CAP);
+		bfin_write_TIMER_ENABLE(TIMEN2);
+	}
+
+	bfin_write_PPI_CONTROL(0x381E);
+	bfin_write_PPI_FRAME(fbdev->modes[mode].tot_lines);
+	bfin_write_PPI_COUNT(fbdev->modes[mode].xres +
+			     fbdev->modes[mode].boeft_blank - 1);
+	bfin_write_PPI_DELAY(fbdev->modes[mode].aoeft_blank - 1);
+}
+
+static void bfin_enable_ppi(void)
+{
+	bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
+}
+
+static void bfin_disable_ppi(void)
+{
+	bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
+}
+
+static inline int adv7393_write(struct i2c_client *client, u8 reg, u8 value)
+{
+	return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+static inline int adv7393_read(struct i2c_client *client, u8 reg)
+{
+	return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int
+adv7393_write_block(struct i2c_client *client,
+		    const u8 *data, unsigned int len)
+{
+	int ret = -1;
+	u8 reg;
+
+	while (len >= 2) {
+		reg = *data++;
+		ret = adv7393_write(client, reg, *data++);
+		if (ret < 0)
+			break;
+		len -= 2;
+	}
+
+	return ret;
+}
+
+static int adv7393_mode(struct i2c_client *client, u16 mode)
+{
+	switch (mode) {
+	case POWER_ON:		/* ADV7393 Sleep mode OFF */
+		adv7393_write(client, 0x00, 0x1E);
+		break;
+	case POWER_DOWN:	/* ADV7393 Sleep mode ON */
+		adv7393_write(client, 0x00, 0x1F);
+		break;
+	case BLANK_OFF:		/* Pixel Data Valid */
+		adv7393_write(client, 0x82, 0xCB);
+		break;
+	case BLANK_ON:		/* Pixel Data Invalid */
+		adv7393_write(client, 0x82, 0x8B);
+		break;
+	default:
+		return -EINVAL;
+		break;
+	}
+	return 0;
+}
+
+static irqreturn_t ppi_irq_error(int irq, void *dev_id)
+{
+
+	struct adv7393fb_device *fbdev = (struct adv7393fb_device *)dev_id;
+
+	u16 status = bfin_read_PPI_STATUS();
+
+	pr_debug("%s: PPI Status = 0x%X\n", __func__, status);
+
+	if (status) {
+		bfin_disable_dma();	/* TODO: Check Sequence */
+		bfin_disable_ppi();
+		bfin_clear_PPI_STATUS();
+		bfin_config_dma(fbdev);
+		bfin_enable_ppi();
+	}
+
+	return IRQ_HANDLED;
+
+}
+
+static int proc_output(char *buf)
+{
+	char *p = buf;
+
+	p += sprintf(p,
+		"Usage:\n"
+		"echo 0x[REG][Value] > adv7393\n"
+		"example: echo 0x1234 >adv7393\n"
+		"writes 0x34 into Register 0x12\n");
+
+	return p - buf;
+}
+
+static int
+adv7393_read_proc(char *page, char **start, off_t off,
+		  int count, int *eof, void *data)
+{
+	int len;
+
+	len = proc_output(page);
+	if (len <= off + count)
+		*eof = 1;
+	*start = page + off;
+	len -= off;
+	if (len > count)
+		len = count;
+	if (len < 0)
+		len = 0;
+	return len;
+}
+
+static int
+adv7393_write_proc(struct file *file, const char __user * buffer,
+		   unsigned long count, void *data)
+{
+	struct adv7393fb_device *fbdev = data;
+	char line[8];
+	unsigned int val;
+	int ret;
+
+	ret = copy_from_user(line, buffer, count);
+	if (ret)
+		return -EFAULT;
+
+	val = simple_strtoul(line, NULL, 0);
+	adv7393_write(fbdev->client, val >> 8, val & 0xff);
+
+	return count;
+}
+
+static int __devinit bfin_adv7393_fb_probe(struct i2c_client *client,
+					   const struct i2c_device_id *id)
+{
+	int ret = 0;
+	struct proc_dir_entry *entry;
+	int num_modes = ARRAY_SIZE(known_modes);
+
+	struct adv7393fb_device *fbdev = NULL;
+
+	if (mem > 2) {
+		dev_err(&client->dev, "mem out of allowed range [1;2]\n");
+		return -EINVAL;
+	}
+
+	if (mode > num_modes) {
+		dev_err(&client->dev, "mode %d: not supported", mode);
+		return -EFAULT;
+	}
+
+	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
+	if (!fbdev) {
+		dev_err(&client->dev, "failed to allocate device private record");
+		return -ENOMEM;
+	}
+
+	i2c_set_clientdata(client, fbdev);
+
+	fbdev->modes = known_modes;
+	fbdev->client = client;
+
+	fbdev->fb_len =
+	    mem * fbdev->modes[mode].xres * fbdev->modes[mode].xres *
+	    (fbdev->modes[mode].bpp / 8);
+
+	fbdev->line_len =
+	    fbdev->modes[mode].xres * (fbdev->modes[mode].bpp / 8);
+
+	/* Workaround "PPI Does Not Start Properly In Specific Mode" */
+	if (ANOMALY_05000400) {
+		if (gpio_request(P_IDENT(P_PPI0_FS3), "PPI0_FS3")) {
+			dev_err(&client->dev, "PPI0_FS3 GPIO request failed\n");
+			ret = -EBUSY;
+			goto out_8;
+		}
+		gpio_direction_output(P_IDENT(P_PPI0_FS3), 0);
+	}
+
+	if (peripheral_request_list(ppi_pins, DRIVER_NAME)) {
+		dev_err(&client->dev, "requesting PPI peripheral failed\n");
+		ret = -EFAULT;
+		goto out_8;
+	}
+
+	fbdev->fb_mem =
+	    dma_alloc_coherent(NULL, fbdev->fb_len, &fbdev->dma_handle,
+			       GFP_KERNEL);
+
+	if (NULL == fbdev->fb_mem) {
+		dev_err(&client->dev, "couldn't allocate dma buffer (%d bytes)\n",
+		       (u32) fbdev->fb_len);
+		ret = -ENOMEM;
+		goto out_7;
+	}
+
+	fbdev->info.screen_base = (void *)fbdev->fb_mem;
+	bfin_adv7393_fb_fix.smem_start = (int)fbdev->fb_mem;
+
+	bfin_adv7393_fb_fix.smem_len = fbdev->fb_len;
+	bfin_adv7393_fb_fix.line_length = fbdev->line_len;
+
+	if (mem > 1)
+		bfin_adv7393_fb_fix.ypanstep = 1;
+
+	bfin_adv7393_fb_defined.red.length = 5;
+	bfin_adv7393_fb_defined.green.length = 6;
+	bfin_adv7393_fb_defined.blue.length = 5;
+
+	bfin_adv7393_fb_defined.xres = fbdev->modes[mode].xres;
+	bfin_adv7393_fb_defined.yres = fbdev->modes[mode].yres;
+	bfin_adv7393_fb_defined.xres_virtual = fbdev->modes[mode].xres;
+	bfin_adv7393_fb_defined.yres_virtual = mem * fbdev->modes[mode].yres;
+	bfin_adv7393_fb_defined.bits_per_pixel = fbdev->modes[mode].bpp;
+
+	fbdev->info.fbops = &bfin_adv7393_fb_ops;
+	fbdev->info.var = bfin_adv7393_fb_defined;
+	fbdev->info.fix = bfin_adv7393_fb_fix;
+	fbdev->info.par = &bfin_par;
+	fbdev->info.flags = FBINFO_DEFAULT;
+
+	fbdev->info.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL);
+	if (!fbdev->info.pseudo_palette) {
+		dev_err(&client->dev, "failed to allocate pseudo_palette\n");
+		ret = -ENOMEM;
+		goto out_6;
+	}
+
+	if (fb_alloc_cmap(&fbdev->info.cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
+		dev_err(&client->dev, "failed to allocate colormap (%d entries)\n",
+			   BFIN_LCD_NBR_PALETTE_ENTRIES);
+		ret = -EFAULT;
+		goto out_5;
+	}
+
+	if (request_dma(CH_PPI, "BF5xx_PPI_DMA") < 0) {
+		dev_err(&client->dev, "unable to request PPI DMA\n");
+		ret = -EFAULT;
+		goto out_4;
+	}
+
+	if (request_irq(IRQ_PPI_ERROR, ppi_irq_error, IRQF_DISABLED,
+			"PPI ERROR", fbdev) < 0) {
+		dev_err(&client->dev, "unable to request PPI ERROR IRQ\n");
+		ret = -EFAULT;
+		goto out_3;
+	}
+
+	fbdev->open = 0;
+
+	ret = adv7393_write_block(client, fbdev->modes[mode].adv7393_i2c_initd,
+				fbdev->modes[mode].adv7393_i2c_initd_len);
+
+	if (ret) {
+		dev_err(&client->dev, "i2c attach: init error\n");
+		goto out_1;
+	}
+
+
+	if (register_framebuffer(&fbdev->info) < 0) {
+		dev_err(&client->dev, "unable to register framebuffer\n");
+		ret = -EFAULT;
+		goto out_1;
+	}
+
+	dev_info(&client->dev, "fb%d: %s frame buffer device\n",
+	       fbdev->info.node, fbdev->info.fix.id);
+	dev_info(&client->dev, "fb memory address : 0x%p\n", fbdev->fb_mem);
+
+	entry = create_proc_entry("driver/adv7393", 0, NULL);
+	if (!entry) {
+		dev_err(&client->dev, "unable to create /proc entry\n");
+		ret = -EFAULT;
+		goto out_0;
+	}
+
+	entry->read_proc = adv7393_read_proc;
+	entry->write_proc = adv7393_write_proc;
+	entry->data = fbdev;
+
+	return 0;
+
+ out_0:
+	unregister_framebuffer(&fbdev->info);
+ out_1:
+	free_irq(IRQ_PPI_ERROR, fbdev);
+ out_3:
+	free_dma(CH_PPI);
+ out_4:
+	dma_free_coherent(NULL, fbdev->fb_len, fbdev->fb_mem,
+			  fbdev->dma_handle);
+ out_5:
+	fb_dealloc_cmap(&fbdev->info.cmap);
+ out_6:
+	kfree(fbdev->info.pseudo_palette);
+ out_7:
+	peripheral_free_list(ppi_pins);
+ out_8:
+	kfree(fbdev);
+
+	return ret;
+}
+
+static int bfin_adv7393_fb_open(struct fb_info *info, int user)
+{
+	struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
+
+	fbdev->info.screen_base = (void *)fbdev->fb_mem;
+	if (!fbdev->info.screen_base) {
+		dev_err(&fbdev->client->dev, "unable to map device\n");
+		return -ENOMEM;
+	}
+
+	fbdev->open = 1;
+	dma_desc_list(fbdev, BUILD);
+	adv7393_mode(fbdev->client, BLANK_OFF);
+	bfin_config_ppi(fbdev);
+	bfin_config_dma(fbdev);
+	bfin_enable_ppi();
+
+	return 0;
+}
+
+static int bfin_adv7393_fb_release(struct fb_info *info, int user)
+{
+	struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
+
+	adv7393_mode(fbdev->client, BLANK_ON);
+	bfin_disable_dma();
+	bfin_disable_ppi();
+	dma_desc_list(fbdev, DESTRUCT);
+	fbdev->open = 0;
+	return 0;
+}
+
+static int
+bfin_adv7393_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+
+	switch (var->bits_per_pixel) {
+	case 16:/* DIRECTCOLOUR, 64k */
+		var->red.offset = info->var.red.offset;
+		var->green.offset = info->var.green.offset;
+		var->blue.offset = info->var.blue.offset;
+		var->red.length = info->var.red.length;
+		var->green.length = info->var.green.length;
+		var->blue.length = info->var.blue.length;
+		var->transp.offset = 0;
+		var->transp.length = 0;
+		var->transp.msb_right = 0;
+		var->red.msb_right = 0;
+		var->green.msb_right = 0;
+		var->blue.msb_right = 0;
+		break;
+	default:
+		pr_debug("%s: depth not supported: %u BPP\n", __func__,
+			 var->bits_per_pixel);
+		return -EINVAL;
+	}
+
+	if (info->var.xres != var->xres ||
+	    info->var.yres != var->yres ||
+	    info->var.xres_virtual != var->xres_virtual ||
+	    info->var.yres_virtual != var->yres_virtual) {
+		pr_debug("%s: Resolution not supported: X%u x Y%u\n",
+			 __func__, var->xres, var->yres);
+		return -EINVAL;
+	}
+
+	/*
+	 *  Memory limit
+	 */
+
+	if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
+		pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
+			 __func__, var->yres_virtual);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static int
+bfin_adv7393_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	int dy;
+	u32 dmaaddr;
+	struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
+
+	if (!var || !info)
+		return -EINVAL;
+
+	if (var->xoffset - info->var.xoffset) {
+		/* No support for X panning for now! */
+		return -EINVAL;
+	}
+	dy = var->yoffset - info->var.yoffset;
+
+	if (dy) {
+		pr_debug("%s: Panning screen of %d lines\n", __func__, dy);
+
+		dmaaddr = fbdev->av1->start_addr;
+		dmaaddr += (info->fix.line_length * dy);
+		/* TODO: Wait for current frame to finished */
+
+		fbdev->av1->start_addr = (unsigned long)dmaaddr;
+		fbdev->av2->start_addr = (unsigned long)dmaaddr + fbdev->line_len;
+	}
+
+	return 0;
+
+}
+
+/* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */
+static int bfin_adv7393_fb_blank(int blank, struct fb_info *info)
+{
+	struct adv7393fb_device *fbdev = to_adv7393fb_device(info);
+
+	switch (blank) {
+
+	case VESA_NO_BLANKING:
+		/* Turn on panel */
+		adv7393_mode(fbdev->client, BLANK_OFF);
+		break;
+
+	case VESA_VSYNC_SUSPEND:
+	case VESA_HSYNC_SUSPEND:
+	case VESA_POWERDOWN:
+		/* Turn off panel */
+		adv7393_mode(fbdev->client, BLANK_ON);
+		break;
+
+	default:
+		return -EINVAL;
+		break;
+	}
+	return 0;
+}
+
+int bfin_adv7393_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
+{
+	if (nocursor)
+		return 0;
+	else
+		return -EINVAL;	/* just to force soft_cursor() call */
+}
+
+static int bfin_adv7393_fb_setcolreg(u_int regno, u_int red, u_int green,
+				     u_int blue, u_int transp,
+				     struct fb_info *info)
+{
+	if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
+		return -EINVAL;
+
+	if (info->var.grayscale)
+		/* grayscale = 0.30*R + 0.59*G + 0.11*B */
+		red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
+
+	if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
+		u32 value;
+		/* Place color in the pseudopalette */
+		if (regno > 16)
+			return -EINVAL;
+
+		red   >>= (16 - info->var.red.length);
+		green >>= (16 - info->var.green.length);
+		blue  >>= (16 - info->var.blue.length);
+
+		value = (red   << info->var.red.offset) |
+			(green << info->var.green.offset)|
+			(blue  << info->var.blue.offset);
+		value &= 0xFFFF;
+
+		((u32 *) (info->pseudo_palette))[regno] = value;
+	}
+
+	return 0;
+}
+
+static int __devexit bfin_adv7393_fb_remove(struct i2c_client *client)
+{
+	struct adv7393fb_device *fbdev = i2c_get_clientdata(client);
+
+	adv7393_mode(client, POWER_DOWN);
+
+	if (fbdev->fb_mem)
+		dma_free_coherent(NULL, fbdev->fb_len, fbdev->fb_mem, fbdev->dma_handle);
+	free_dma(CH_PPI);
+	free_irq(IRQ_PPI_ERROR, fbdev);
+	unregister_framebuffer(&fbdev->info);
+	remove_proc_entry("driver/adv7393", NULL);
+	fb_dealloc_cmap(&fbdev->info.cmap);
+	kfree(fbdev->info.pseudo_palette);
+
+	if (ANOMALY_05000400)
+		gpio_free(P_IDENT(P_PPI0_FS3));	/* FS3 */
+	peripheral_free_list(ppi_pins);
+	kfree(fbdev);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int bfin_adv7393_fb_suspend(struct device *dev)
+{
+	struct adv7393fb_device *fbdev = dev_get_drvdata(dev);
+
+	if (fbdev->open) {
+		bfin_disable_dma();
+		bfin_disable_ppi();
+		dma_desc_list(fbdev, DESTRUCT);
+	}
+	adv7393_mode(fbdev->client, POWER_DOWN);
+
+	return 0;
+}
+
+static int bfin_adv7393_fb_resume(struct device *dev)
+{
+	struct adv7393fb_device *fbdev = dev_get_drvdata(dev);
+
+	adv7393_mode(fbdev->client, POWER_ON);
+
+	if (fbdev->open) {
+		dma_desc_list(fbdev, BUILD);
+		bfin_config_ppi(fbdev);
+		bfin_config_dma(fbdev);
+		bfin_enable_ppi();
+	}
+
+	return 0;
+}
+
+static const struct dev_pm_ops bfin_adv7393_dev_pm_ops = {
+	.suspend = bfin_adv7393_fb_suspend,
+	.resume  = bfin_adv7393_fb_resume,
+};
+#endif
+
+static const struct i2c_device_id bfin_adv7393_id[] = {
+	{DRIVER_NAME, 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, bfin_adv7393_id);
+
+static struct i2c_driver bfin_adv7393_fb_driver = {
+	.driver = {
+		.name = DRIVER_NAME,
+#ifdef CONFIG_PM
+		.pm   = &bfin_adv7393_dev_pm_ops,
+#endif
+	},
+	.probe = bfin_adv7393_fb_probe,
+	.remove = __devexit_p(bfin_adv7393_fb_remove),
+	.id_table = bfin_adv7393_id,
+};
+
+static int __init bfin_adv7393_fb_driver_init(void)
+{
+#if  defined(CONFIG_I2C_BLACKFIN_TWI) || defined(CONFIG_I2C_BLACKFIN_TWI_MODULE)
+	request_module("i2c-bfin-twi");
+#else
+	request_module("i2c-gpio");
+#endif
+
+	return i2c_add_driver(&bfin_adv7393_fb_driver);
+}
+module_init(bfin_adv7393_fb_driver_init);
+
+static void __exit bfin_adv7393_fb_driver_cleanup(void)
+{
+	i2c_del_driver(&bfin_adv7393_fb_driver);
+}
+module_exit(bfin_adv7393_fb_driver_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("Frame buffer driver for ADV7393/2 Video Encoder");
+
+module_param(mode, int, 0);
+MODULE_PARM_DESC(mode,
+	"Video Mode (0=NTSC,1=PAL,2=NTSC 640x480,3=PAL 640x480,4=NTSC YCbCr input,5=PAL YCbCr input)");
+
+module_param(mem, int, 0);
+MODULE_PARM_DESC(mem,
+	"Size of frame buffer memory 1=Single 2=Double Size (allows y-panning / frame stacking)");
+
+module_param(nocursor, int, 0644);
+MODULE_PARM_DESC(nocursor, "cursor enable/disable");

drivers/video/bfin_adv7393fb.h

@@ -0,0 +1,321 @@
+/*
+ * Frame buffer driver for ADV7393/2 video encoder
+ *
+ * Copyright 2006-2009 Analog Devices Inc.
+ * Licensed under the GPL-2 or late.
+ */
+
+#ifndef __BFIN_ADV7393FB_H__
+#define __BFIN_ADV7393FB_H__
+
+#define BFIN_LCD_NBR_PALETTE_ENTRIES	256
+
+#ifdef CONFIG_NTSC
+# define VMODE 0
+#endif
+#ifdef CONFIG_PAL
+# define VMODE 1
+#endif
+#ifdef CONFIG_NTSC_640x480
+# define VMODE 2
+#endif
+#ifdef CONFIG_PAL_640x480
+# define VMODE 3
+#endif
+#ifdef CONFIG_NTSC_YCBCR
+# define VMODE 4
+#endif
+#ifdef CONFIG_PAL_YCBCR
+# define VMODE 5
+#endif
+
+#ifndef VMODE
+# define VMODE 1
+#endif
+
+#ifdef CONFIG_ADV7393_2XMEM
+# define VMEM 2
+#else
+# define VMEM 1
+#endif
+
+#if defined(CONFIG_BF537) || defined(CONFIG_BF536) || defined(CONFIG_BF534)
+# define DMA_CFG_VAL	0x7935	/* Set Sync Bit */
+# define VB_DUMMY_MEMORY_SOURCE	L1_DATA_B_START
+#else
+# define DMA_CFG_VAL	0x7915
+# define VB_DUMMY_MEMORY_SOURCE	BOOT_ROM_START
+#endif
+
+enum {
+	DESTRUCT,
+	BUILD,
+};
+
+enum {
+	POWER_ON,
+	POWER_DOWN,
+	BLANK_ON,
+	BLANK_OFF,
+};
+
+#define DRIVER_NAME "bfin-adv7393"
+
+struct adv7393fb_modes {
+	const s8 name[25];	/* Full name */
+	u16 xres;		/* Active Horizonzal Pixels  */
+	u16 yres;		/* Active Vertical Pixels  */
+	u16 bpp;
+	u16 vmode;
+	u16 a_lines;		/* Active Lines per Field */
+	u16 vb1_lines;		/* Vertical Blanking Field 1 Lines */
+	u16 vb2_lines;		/* Vertical Blanking Field 2 Lines */
+	u16 tot_lines;		/* Total Lines per Frame */
+	u16 boeft_blank;	/* Before Odd/Even Field Transition No. of Blank Pixels */
+	u16 aoeft_blank;	/* After Odd/Even Field Transition No. of Blank Pixels */
+	const s8 *adv7393_i2c_initd;
+	u16 adv7393_i2c_initd_len;
+};
+
+static const u8 init_NTSC_TESTPATTERN[] = {
+	0x00, 0x1E,	/* Power up all DACs and PLL */
+	0x01, 0x00,	/* SD-Only Mode */
+	0x80, 0x10,	/* SSAF Luma Filter Enabled, NTSC Mode */
+	0x82, 0xCB,	/* Step control on, pixel data valid, pedestal on, PrPb SSAF on, CVBS/YC output */
+	0x84, 0x40,	/* SD Color Bar Test Pattern Enabled, DAC 2 = Luma, DAC 3 = Chroma */
+};
+
+static const u8 init_NTSC[] = {
+	0x00, 0x1E,	/* Power up all DACs and PLL */
+	0xC3, 0x26,	/* Program RGB->YCrCb Color Space convertion matrix */
+	0xC5, 0x12,	/* Program RGB->YCrCb Color Space convertion matrix */
+	0xC2, 0x4A,	/* Program RGB->YCrCb Color Space convertion matrix */
+	0xC6, 0x5E,	/* Program RGB->YCrCb Color Space convertion matrix */
+	0xBD, 0x19,	/* Program RGB->YCrCb Color Space convertion matrix */
+	0xBF, 0x42,	/* Program RGB->YCrCb Color Space convertion matrix */
+	0x8C, 0x1F,	/* NTSC Subcarrier Frequency */
+	0x8D, 0x7C,	/* NTSC Subcarrier Frequency */
+	0x8E, 0xF0,	/* NTSC Subcarrier Frequency */
+	0x8F, 0x21,	/* NTSC Subcarrier Frequency */
+	0x01, 0x00,	/* SD-Only Mode */
+	0x80, 0x30,	/* SSAF Luma Filter Enabled, NTSC Mode */
+	0x82, 0x8B,	/* Step control on, pixel data invalid, pedestal on, PrPb SSAF on, CVBS/YC output */
+	0x87, 0x80,	/* SD Color Bar Test Pattern Enabled, DAC 2 = Luma, DAC 3 = Chroma */
+	0x86, 0x82,
+	0x8B, 0x11,
+	0x88, 0x20,
+	0x8A, 0x0d,
+};
+
+static const u8 init_PAL[] = {
+	0x00, 0x1E,	/* Power up all DACs and PLL */
+	0xC3, 0x26,	/* Program RGB->YCrCb Color Space convertion matrix */
+	0xC5, 0x12,	/* Program RGB->YCrCb Color Space convertion matrix */
+	0xC2, 0x4A,	/* Program RGB->YCrCb Color Space convertion matrix */
+	0xC6, 0x5E,	/* Program RGB->YCrCb Color Space convertion matrix */
+	0xBD, 0x19,	/* Program RGB->YCrCb Color Space convertion matrix */
+	0xBF, 0x42,	/* Program RGB->YCrCb Color Space convertion matrix */
+	0x8C, 0xCB,	/* PAL Subcarrier Frequency */
+	0x8D, 0x8A,	/* PAL Subcarrier Frequency */
+	0x8E, 0x09,	/* PAL Subcarrier Frequency */
+	0x8F, 0x2A,	/* PAL Subcarrier Frequency */
+	0x01, 0x00,	/* SD-Only Mode */
+	0x80, 0x11,	/* SSAF Luma Filter Enabled, PAL Mode */
+	0x82, 0x8B,	/* Step control on, pixel data invalid, pedestal on, PrPb SSAF on, CVBS/YC output */
+	0x87, 0x80,	/* SD Color Bar Test Pattern Enabled, DAC 2 = Luma, DAC 3 = Chroma */
+	0x86, 0x82,
+	0x8B, 0x11,
+	0x88, 0x20,
+	0x8A, 0x0d,
+};
+
+static const u8 init_NTSC_YCbCr[] = {
+	0x00, 0x1E,	/* Power up all DACs and PLL */
+	0x8C, 0x1F,	/* NTSC Subcarrier Frequency */
+	0x8D, 0x7C,	/* NTSC Subcarrier Frequency */
+	0x8E, 0xF0,	/* NTSC Subcarrier Frequency */
+	0x8F, 0x21,	/* NTSC Subcarrier Frequency */
+	0x01, 0x00,	/* SD-Only Mode */
+	0x80, 0x30,	/* SSAF Luma Filter Enabled, NTSC Mode */
+	0x82, 0x8B,	/* Step control on, pixel data invalid, pedestal on, PrPb SSAF on, CVBS/YC output */
+	0x87, 0x00,	/* DAC 2 = Luma, DAC 3 = Chroma */
+	0x86, 0x82,
+	0x8B, 0x11,
+	0x88, 0x08,
+	0x8A, 0x0d,
+};
+
+static const u8 init_PAL_YCbCr[] = {
+	0x00, 0x1E,	/* Power up all DACs and PLL */
+	0x8C, 0xCB,	/* PAL Subcarrier Frequency */
+	0x8D, 0x8A,	/* PAL Subcarrier Frequency */
+	0x8E, 0x09,	/* PAL Subcarrier Frequency */
+	0x8F, 0x2A,	/* PAL Subcarrier Frequency */
+	0x01, 0x00,	/* SD-Only Mode */
+	0x80, 0x11,	/* SSAF Luma Filter Enabled, PAL Mode */
+	0x82, 0x8B,	/* Step control on, pixel data invalid, pedestal on, PrPb SSAF on, CVBS/YC output */
+	0x87, 0x00,	/* DAC 2 = Luma, DAC 3 = Chroma */
+	0x86, 0x82,
+	0x8B, 0x11,
+	0x88, 0x08,
+	0x8A, 0x0d,
+};
+
+static struct adv7393fb_modes known_modes[] = {
+	/* NTSC 720x480 CRT */
+	{
+		.name = "NTSC 720x480",
+		.xres = 720,
+		.yres = 480,
+		.bpp = 16,
+		.vmode = FB_VMODE_INTERLACED,
+		.a_lines = 240,
+		.vb1_lines = 22,
+		.vb2_lines = 23,
+		.tot_lines = 525,
+		.boeft_blank = 16,
+		.aoeft_blank = 122,
+		.adv7393_i2c_initd = init_NTSC,
+		.adv7393_i2c_initd_len = sizeof(init_NTSC)
+	},
+	/* PAL 720x480 CRT */
+	{
+		.name = "PAL 720x576",
+		.xres = 720,
+		.yres = 576,
+		.bpp = 16,
+		.vmode = FB_VMODE_INTERLACED,
+		.a_lines = 288,
+		.vb1_lines = 24,
+		.vb2_lines = 25,
+		.tot_lines = 625,
+		.boeft_blank = 12,
+		.aoeft_blank = 132,
+		.adv7393_i2c_initd = init_PAL,
+		.adv7393_i2c_initd_len = sizeof(init_PAL)
+	},
+	/* NTSC 640x480 CRT Experimental */
+	{
+		.name = "NTSC 640x480",
+		.xres = 640,
+		.yres = 480,
+		.bpp = 16,
+		.vmode = FB_VMODE_INTERLACED,
+		.a_lines = 240,
+		.vb1_lines = 22,
+		.vb2_lines = 23,
+		.tot_lines = 525,
+		.boeft_blank = 16 + 40,
+		.aoeft_blank = 122 + 40,
+		.adv7393_i2c_initd = init_NTSC,
+		.adv7393_i2c_initd_len = sizeof(init_NTSC)
+	},
+	/* PAL 640x480 CRT Experimental */
+	{
+		.name = "PAL 640x480",
+		.xres = 640,
+		.yres = 480,
+		.bpp = 16,
+		.vmode = FB_VMODE_INTERLACED,
+		.a_lines = 288 - 20,
+		.vb1_lines = 24 + 20,
+		.vb2_lines = 25 + 20,
+		.tot_lines = 625,
+		.boeft_blank = 12 + 40,
+		.aoeft_blank = 132 + 40,
+		.adv7393_i2c_initd = init_PAL,
+		.adv7393_i2c_initd_len = sizeof(init_PAL)
+	},
+	/* NTSC 720x480 YCbCR */
+	{
+		.name = "NTSC 720x480 YCbCR",
+		.xres = 720,
+		.yres = 480,
+		.bpp = 16,
+		.vmode = FB_VMODE_INTERLACED,
+		.a_lines = 240,
+		.vb1_lines = 22,
+		.vb2_lines = 23,
+		.tot_lines = 525,
+		.boeft_blank = 16,
+		.aoeft_blank = 122,
+		.adv7393_i2c_initd = init_NTSC_YCbCr,
+		.adv7393_i2c_initd_len = sizeof(init_NTSC_YCbCr)
+	},
+	/* PAL 720x480 CRT */
+	{
+		.name = "PAL 720x576 YCbCR",
+		.xres = 720,
+		.yres = 576,
+		.bpp = 16,
+		.vmode = FB_VMODE_INTERLACED,
+		.a_lines = 288,
+		.vb1_lines = 24,
+		.vb2_lines = 25,
+		.tot_lines = 625,
+		.boeft_blank = 12,
+		.aoeft_blank = 132,
+		.adv7393_i2c_initd = init_PAL_YCbCr,
+		.adv7393_i2c_initd_len = sizeof(init_PAL_YCbCr)
+	}
+};
+
+struct adv7393fb_regs {
+
+};
+
+struct adv7393fb_device {
+	struct fb_info info;	/* FB driver info record */
+
+	struct i2c_client *client;
+
+	struct dmasg *descriptor_list_head;
+	struct dmasg *vb1;
+	struct dmasg *av1;
+	struct dmasg *vb2;
+	struct dmasg *av2;
+
+	dma_addr_t dma_handle;
+
+	struct fb_info bfin_adv7393_fb;
+
+	struct adv7393fb_modes *modes;
+
+	struct adv7393fb_regs *regs;	/* Registers memory map */
+	size_t regs_len;
+	size_t fb_len;
+	size_t line_len;
+	u16 open;
+	u16 *fb_mem;		/* RGB Buffer */
+
+};
+
+#define to_adv7393fb_device(_info) \
+	  (_info ? container_of(_info, struct adv7393fb_device, info) : NULL);
+
+static int bfin_adv7393_fb_open(struct fb_info *info, int user);
+static int bfin_adv7393_fb_release(struct fb_info *info, int user);
+static int bfin_adv7393_fb_check_var(struct fb_var_screeninfo *var,
+				     struct fb_info *info);
+
+static int bfin_adv7393_fb_pan_display(struct fb_var_screeninfo *var,
+				       struct fb_info *info);
+
+static int bfin_adv7393_fb_blank(int blank, struct fb_info *info);
+
+static void bfin_config_ppi(struct adv7393fb_device *fbdev);
+static int bfin_config_dma(struct adv7393fb_device *fbdev);
+static void bfin_disable_dma(void);
+static void bfin_enable_ppi(void);
+static void bfin_disable_ppi(void);
+
+static inline int adv7393_write(struct i2c_client *client, u8 reg, u8 value);
+static inline int adv7393_read(struct i2c_client *client, u8 reg);
+static int adv7393_write_block(struct i2c_client *client, const u8 *data,
+			       unsigned int len);
+
+int bfin_adv7393_fb_cursor(struct fb_info *info, struct fb_cursor *cursor);
+static int bfin_adv7393_fb_setcolreg(u_int, u_int, u_int, u_int,
+				     u_int, struct fb_info *info);
+
+#endif