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Subject[PATCH] fbdev: bfin-lq035q1-fb: new Blackfin Landscape LCD EZ-Extender driver
Date
From: Michael Hennerich <michael.hennerich@analog.com>

Framebuffer driver for the Landscape LCD EZ-Extender (ADZS-BFLLCD-EZEXT)
http://docs.blackfin.uclinux.org/doku.php?id=hw:cards:landscape_lcd_ez-extender

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
---
arch/blackfin/include/asm/bfin-lq035q1.h | 28 +
drivers/video/Kconfig | 13 +
drivers/video/Makefile | 1 +
drivers/video/bfin-lq035q1-fb.c | 855 ++++++++++++++++++++++++++++++
4 files changed, 897 insertions(+), 0 deletions(-)
create mode 100644 arch/blackfin/include/asm/bfin-lq035q1.h
create mode 100644 drivers/video/bfin-lq035q1-fb.c
diff --git a/arch/blackfin/include/asm/bfin-lq035q1.h b/arch/blackfin/include/asm/bfin-lq035q1.h
new file mode 100644
index 0000000..a87a6b6
--- /dev/null
+++ b/arch/blackfin/include/asm/bfin-lq035q1.h
@@ -0,0 +1,28 @@
+/*
+ * Blackfin LCD Framebufer driver SHARP LQ035Q1DH02
+ *
+ * Copyright 2008-2009 Analog Devices Inc.
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef BFIN_LQ035Q1_H
+#define BFIN_LQ035Q1_H
+
+#define LQ035_RL (0 << 8) /* Right -> Left Scan */
+#define LQ035_LR (1 << 8) /* Left -> Right Scan */
+#define LQ035_TB (1 << 9) /* Top -> Botton Scan */
+#define LQ035_BT (0 << 9) /* Botton -> Top Scan */
+#define LQ035_BGR (1 << 11) /* Use BGR format */
+#define LQ035_RGB (0 << 11) /* Use RGB format */
+#define LQ035_NORM (1 << 13) /* Reversal */
+#define LQ035_REV (0 << 13) /* Reversal */
+
+struct bfin_lq035q1fb_disp_info {
+
+ unsigned mode;
+ /* GPIOs */
+ int use_bl;
+ unsigned gpio_bl;
+};
+
+#endif /* BFIN_LQ035Q1_H */
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 3b54b39..94501e0 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -609,6 +609,19 @@ config FB_BFIN_T350MCQB
This display is a QVGA 320x240 24-bit RGB display interfaced by an 8-bit wide PPI
It uses PPI[0..7] PPI_FS1, PPI_FS2 and PPI_CLK.

+config FB_BFIN_LQ035Q1
+ tristate "SHARP LQ035Q1DH02 TFT LCD"
+ depends on FB && BLACKFIN
+ select FB_CFB_FILLRECT
+ select FB_CFB_COPYAREA
+ select FB_CFB_IMAGEBLIT
+ select BFIN_GPTIMERS
+ select SPI
+ help
+ This is the framebuffer device driver for a SHARP LQ035Q1DH02 TFT display found on
+ the Blackfin Landscape LCD EZ-Extender Card.
+ This display is a QVGA 320x240 18-bit RGB display interfaced by an 16-bit wide PPI
+ It uses PPI[0..15] PPI_FS1, PPI_FS2 and PPI_CLK.

config FB_STI
tristate "HP STI frame buffer device support"
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 01a819f..cc7682b 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -134,6 +134,7 @@ obj-$(CONFIG_FB_EFI) += efifb.o
obj-$(CONFIG_FB_VGA16) += vga16fb.o
obj-$(CONFIG_FB_OF) += offb.o
obj-$(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_MX3) += mx3fb.o

diff --git a/drivers/video/bfin-lq035q1-fb.c b/drivers/video/bfin-lq035q1-fb.c
new file mode 100644
index 0000000..23eb369
--- /dev/null
+++ b/drivers/video/bfin-lq035q1-fb.c
@@ -0,0 +1,855 @@
+/*
+ * Blackfin LCD Framebufer driver SHARP LQ035Q1DH02
+ *
+ * Copyright 2008-2009 Analog Devices Inc.
+ * Licensed under the GPL-2 or later.
+ */
+
+#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/fb.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/backlight.h>
+#include <linux/lcd.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/blackfin.h>
+#include <asm/irq.h>
+#include <asm/dma.h>
+#include <asm/portmux.h>
+#include <asm/gptimers.h>
+
+#include <asm/bfin-lq035q1.h>
+
+#if defined(BF533_FAMILY) || defined(BF538_FAMILY)
+#define TIMER_HSYNC_id TIMER1_id
+#define TIMER_HSYNCbit TIMER1bit
+#define TIMER_HSYNC_STATUS_TRUN TIMER_STATUS_TRUN1
+#define TIMER_HSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL1
+#define TIMER_HSYNC_STATUS_TOVF TIMER_STATUS_TOVF1
+
+#define TIMER_VSYNC_id TIMER2_id
+#define TIMER_VSYNCbit TIMER2bit
+#define TIMER_VSYNC_STATUS_TRUN TIMER_STATUS_TRUN2
+#define TIMER_VSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL2
+#define TIMER_VSYNC_STATUS_TOVF TIMER_STATUS_TOVF2
+#else
+#define TIMER_HSYNC_id TIMER0_id
+#define TIMER_HSYNCbit TIMER0bit
+#define TIMER_HSYNC_STATUS_TRUN TIMER_STATUS_TRUN0
+#define TIMER_HSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL0
+#define TIMER_HSYNC_STATUS_TOVF TIMER_STATUS_TOVF0
+
+#define TIMER_VSYNC_id TIMER1_id
+#define TIMER_VSYNCbit TIMER1bit
+#define TIMER_VSYNC_STATUS_TRUN TIMER_STATUS_TRUN1
+#define TIMER_VSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL1
+#define TIMER_VSYNC_STATUS_TOVF TIMER_STATUS_TOVF1
+#endif
+
+#define LCD_X_RES 320 /* Horizontal Resolution */
+#define LCD_Y_RES 240 /* Vertical Resolution */
+#define DMA_BUS_SIZE 16
+
+#define USE_RGB565_16_BIT_PPI
+
+#ifdef USE_RGB565_16_BIT_PPI
+#define LCD_BPP 16 /* Bit Per Pixel */
+#define CLOCKS_PER_PIX 1
+#define CPLD_PIPELINE_DELAY_COR 0 /* NO CPLB */
+#endif
+
+/* Interface 16/18-bit TFT over an 8-bit wide PPI using a small Programmable Logic Device (CPLD)
+ * http://blackfin.uclinux.org/gf/project/stamp/frs/?action=FrsReleaseBrowse&frs_package_id=165
+ */
+
+#ifdef USE_RGB565_8_BIT_PPI
+#define LCD_BPP 16 /* Bit Per Pixel */
+#define CLOCKS_PER_PIX 2
+#define CPLD_PIPELINE_DELAY_COR 3 /* RGB565 */
+#endif
+
+#ifdef USE_RGB888_8_BIT_PPI
+#define LCD_BPP 24 /* Bit Per Pixel */
+#define CLOCKS_PER_PIX 3
+#define CPLD_PIPELINE_DELAY_COR 5 /* RGB888 */
+#endif
+
+ /*
+ * HS and VS timing parameters (all in number of PPI clk ticks)
+ */
+
+#define U_LINE 4 /* Blanking Lines */
+
+#define H_ACTPIX (LCD_X_RES * CLOCKS_PER_PIX) /* active horizontal pixel */
+#define H_PERIOD (336 * CLOCKS_PER_PIX) /* HS period */
+#define H_PULSE (2 * CLOCKS_PER_PIX) /* HS pulse width */
+#define H_START (7 * CLOCKS_PER_PIX + CPLD_PIPELINE_DELAY_COR) /* first valid pixel */
+
+#define V_LINES (LCD_Y_RES + U_LINE) /* total vertical lines */
+#define V_PULSE (2 * CLOCKS_PER_PIX) /* VS pulse width (1-5 H_PERIODs) */
+#define V_PERIOD (H_PERIOD * V_LINES) /* VS period */
+
+#define ACTIVE_VIDEO_MEM_OFFSET ((U_LINE / 2) * LCD_X_RES * (LCD_BPP / 8))
+
+#define BFIN_LCD_NBR_PALETTE_ENTRIES 256
+
+#define PPI_TX_MODE 0x2
+#define PPI_XFER_TYPE_11 0xC
+#define PPI_PORT_CFG_01 0x10
+#define PPI_POLS_1 0x8000
+
+#if (CLOCKS_PER_PIX > 1)
+#define PPI_PMODE (DLEN_8 | PACK_EN)
+#else
+#define PPI_PMODE (DLEN_16)
+#endif
+
+#define LQ035_INDEX 0x74
+#define LQ035_DATA 0x76
+
+#define LQ035_DRIVER_OUTPUT_CTL 0x1
+#define LQ035_SHUT_CTL 0x11
+
+#define LQ035_DRIVER_OUTPUT_MASK (LQ035_LR | LQ035_TB | LQ035_BGR | LQ035_REV)
+#define LQ035_DRIVER_OUTPUT_DEFAULT (0x2AEF & ~LQ035_DRIVER_OUTPUT_MASK)
+
+#define LQ035_SHUT (1 << 0) /* Shutdown */
+#define LQ035_ON (0 << 0) /* Shutdown */
+
+#define DRIVER_NAME "bfin-lq035q1"
+static char driver_name[] = DRIVER_NAME;
+
+struct bfin_lq035q1fb_info {
+ struct fb_info *fb;
+ struct device *dev;
+ struct bfin_lq035q1fb_disp_info *disp_info;
+ unsigned char *fb_buffer; /* RGB Buffer */
+ dma_addr_t dma_handle;
+ int lq035_mmap;
+ int lq035_open_cnt;
+ int irq;
+ spinlock_t lock; /* lock */
+ u32 pseudo_pal[16];
+};
+
+static int nocursor;
+module_param(nocursor, int, 0644);
+MODULE_PARM_DESC(nocursor, "cursor enable/disable");
+
+
+static struct {
+ struct spi_device *spidev;
+ unsigned short mode;
+ unsigned short init;
+} spi_control;
+
+static int lq035q1_control(unsigned char reg, unsigned short value)
+{
+ int ret;
+ u8 regs[3] = {LQ035_INDEX, 0, 0};
+ u8 dat[3] = {LQ035_DATA, 0, 0};
+
+ if (spi_control.spidev) {
+ regs[2] = reg;
+ dat[1] = value >> 8;
+ dat[2] = value & 0xFF;
+
+ ret = spi_write(spi_control.spidev, regs, ARRAY_SIZE(regs));
+ ret |= spi_write(spi_control.spidev, dat, ARRAY_SIZE(dat));
+ } else
+ return -ENODEV;
+
+ return ret;
+}
+
+static int __devinit lq035q1_spidev_probe(struct spi_device *spi)
+{
+ int ret;
+ spi_control.spidev = spi;
+
+ ret = lq035q1_control(LQ035_SHUT_CTL, LQ035_ON);
+ ret |= lq035q1_control(LQ035_DRIVER_OUTPUT_CTL, spi_control.mode);
+
+ if (ret)
+ return ret;
+
+ spi_control.init = 1;
+
+ return 0;
+}
+
+static int __devexit lq035q1_spidev_remove(struct spi_device *spi)
+{
+ return lq035q1_control(LQ035_SHUT_CTL, LQ035_SHUT);
+}
+
+#ifdef CONFIG_PM
+static int lq035q1_spidev_suspend(struct spi_device *spi, pm_message_t state)
+{
+ return lq035q1_control(LQ035_SHUT_CTL, LQ035_SHUT);
+}
+
+static int lq035q1_spidev_resume(struct spi_device *spi)
+{
+ int ret = lq035q1_control(LQ035_DRIVER_OUTPUT_CTL, spi_control.mode);
+
+ if (ret)
+ return ret;
+
+ return lq035q1_control(LQ035_SHUT_CTL, LQ035_ON);
+}
+#else
+#define lq035q1_spidev_suspend NULL
+#define lq035q1_spidev_resume NULL
+#endif
+
+/* Power down all displays on reboot, poweroff or halt */
+static void lq035q1_spidev_shutdown(struct spi_device *spi)
+{
+ lq035q1_control(LQ035_SHUT_CTL, LQ035_SHUT);
+}
+
+static struct spi_driver spidev_spi = {
+ .driver = {
+ .name = DRIVER_NAME"-spi",
+ .owner = THIS_MODULE,
+ },
+ .probe = lq035q1_spidev_probe,
+ .remove = __devexit_p(lq035q1_spidev_remove),
+ .shutdown = lq035q1_spidev_shutdown,
+ .suspend = lq035q1_spidev_suspend,
+ .resume = lq035q1_spidev_resume,
+};
+
+static int lq035q1_backlight(struct bfin_lq035q1fb_info *info, unsigned arg)
+{
+ if (info->disp_info->use_bl)
+ gpio_set_value(info->disp_info->gpio_bl, arg);
+
+ return 0;
+}
+
+static void bfin_lq035q1_config_ppi(struct bfin_lq035q1fb_info *fbi)
+{
+ bfin_write_PPI_DELAY(H_START);
+ bfin_write_PPI_COUNT(H_ACTPIX - 1);
+ bfin_write_PPI_FRAME(V_LINES);
+
+ bfin_write_PPI_CONTROL(PPI_TX_MODE | /* output mode , PORT_DIR */
+ PPI_XFER_TYPE_11 | /* sync mode XFR_TYPE */
+ PPI_PORT_CFG_01 | /* two frame sync PORT_CFG */
+ PPI_PMODE | /* 8/16 bit data length / PACK_EN? */
+ PPI_POLS_1); /* faling edge syncs POLS */
+}
+
+static inline void bfin_lq035q1_disable_ppi(void)
+{
+ bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
+}
+
+static inline void bfin_lq035q1_enable_ppi(void)
+{
+ bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
+}
+
+static void bfin_lq035q1_start_timers(void)
+{
+ enable_gptimers(TIMER_VSYNCbit | TIMER_HSYNCbit);
+}
+
+static void bfin_lq035q1_stop_timers(void)
+{
+ disable_gptimers(TIMER_HSYNCbit | TIMER_VSYNCbit);
+
+ set_gptimer_status(0, TIMER_HSYNC_STATUS_TRUN | TIMER_VSYNC_STATUS_TRUN |
+ TIMER_HSYNC_STATUS_TIMIL | TIMER_VSYNC_STATUS_TIMIL |
+ TIMER_HSYNC_STATUS_TOVF | TIMER_VSYNC_STATUS_TOVF);
+
+}
+
+static void bfin_lq035q1_init_timers(void)
+{
+
+ bfin_lq035q1_stop_timers();
+
+ set_gptimer_period(TIMER_HSYNC_id, H_PERIOD);
+ set_gptimer_pwidth(TIMER_HSYNC_id, H_PULSE);
+ set_gptimer_config(TIMER_HSYNC_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
+ TIMER_TIN_SEL | TIMER_CLK_SEL|
+ TIMER_EMU_RUN);
+
+ set_gptimer_period(TIMER_VSYNC_id, V_PERIOD);
+ set_gptimer_pwidth(TIMER_VSYNC_id, V_PULSE);
+ set_gptimer_config(TIMER_VSYNC_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
+ TIMER_TIN_SEL | TIMER_CLK_SEL |
+ TIMER_EMU_RUN);
+
+}
+
+static void bfin_lq035q1_config_dma(struct bfin_lq035q1fb_info *fbi)
+{
+
+ set_dma_config(CH_PPI,
+ set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
+ INTR_DISABLE, DIMENSION_2D,
+ DATA_SIZE_16,
+ DMA_NOSYNC_KEEP_DMA_BUF));
+ set_dma_x_count(CH_PPI, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
+ set_dma_x_modify(CH_PPI, DMA_BUS_SIZE / 8);
+ set_dma_y_count(CH_PPI, V_LINES);
+
+ set_dma_y_modify(CH_PPI, DMA_BUS_SIZE / 8);
+ set_dma_start_addr(CH_PPI, (unsigned long)fbi->fb_buffer);
+
+}
+
+#if (CLOCKS_PER_PIX == 1)
+static const u16 ppi0_req_16[] = {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};
+#else
+static const u16 ppi0_req_16[] = {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, 0};
+#endif
+
+static int bfin_lq035q1_request_ports(int action)
+{
+ if (action) {
+ /* ANOMALY_05000400 - PPI Does Not Start Properly In Specific Mode:
+ * Drive PPI_FS3 Low
+ */
+ if (ANOMALY_05000400) {
+ int ret = gpio_request(P_IDENT(P_PPI0_FS3), "PPI_FS3");
+ if (ret)
+ return ret;
+ gpio_direction_output(P_IDENT(P_PPI0_FS3), 0);
+ }
+
+ if (peripheral_request_list(ppi0_req_16, DRIVER_NAME)) {
+ pr_err("requesting peripherals failed\n");
+ return -EFAULT;
+ }
+ } else {
+ peripheral_free_list(ppi0_req_16);
+ if (ANOMALY_05000400)
+ gpio_free(P_IDENT(P_PPI0_FS3));
+ }
+
+ return 0;
+}
+
+static int bfin_lq035q1_fb_open(struct fb_info *info, int user)
+{
+ struct bfin_lq035q1fb_info *fbi = info->par;
+
+ spin_lock(&fbi->lock);
+ fbi->lq035_open_cnt++;
+
+ if (fbi->lq035_open_cnt <= 1) {
+
+ bfin_lq035q1_disable_ppi();
+ SSYNC();
+
+ bfin_lq035q1_config_dma(fbi);
+ bfin_lq035q1_config_ppi(fbi);
+ bfin_lq035q1_init_timers();
+
+ /* start dma */
+ enable_dma(CH_PPI);
+ bfin_lq035q1_enable_ppi();
+ bfin_lq035q1_start_timers();
+ lq035q1_backlight(fbi, 1);
+ }
+
+ spin_unlock(&fbi->lock);
+
+ return 0;
+}
+
+static int bfin_lq035q1_fb_release(struct fb_info *info, int user)
+{
+ struct bfin_lq035q1fb_info *fbi = info->par;
+
+ spin_lock(&fbi->lock);
+
+ fbi->lq035_open_cnt--;
+ fbi->lq035_mmap = 0;
+
+ if (fbi->lq035_open_cnt <= 0) {
+ lq035q1_backlight(fbi, 0);
+ bfin_lq035q1_disable_ppi();
+ SSYNC();
+ disable_dma(CH_PPI);
+ bfin_lq035q1_stop_timers();
+ }
+
+ spin_unlock(&fbi->lock);
+
+ return 0;
+}
+
+static int bfin_lq035q1_fb_check_var(struct fb_var_screeninfo *var,
+ struct fb_info *info)
+{
+
+ switch (var->bits_per_pixel) {
+#if (LCD_BPP == 24)
+ case 24:/* TRUECOLOUR, 16m */
+#else
+ case 16:/* DIRECTCOLOUR, 64k */
+#endif
+ 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_lq035q1_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+ struct bfin_lq035q1fb_info *fbi = info->par;
+
+ if (fbi->lq035_mmap)
+ return -1;
+
+ spin_lock(&fbi->lock);
+ fbi->lq035_mmap = 1;
+ spin_unlock(&fbi->lock);
+
+ vma->vm_start = (unsigned long)(fbi->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET);
+
+ vma->vm_end = vma->vm_start + info->fix.smem_len;
+ /* For those who don't understand how mmap works, go read
+ * Documentation/nommu-mmap.txt.
+ * For those that do, you will know that the VM_MAYSHARE flag
+ * must be set in the vma->vm_flags structure on noMMU
+ * Other flags can be set, and are documented in
+ * include/linux/mm.h
+ */
+ vma->vm_flags |= VM_MAYSHARE | VM_SHARED;
+
+ return 0;
+}
+
+int bfin_lq035q1_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_lq035q1_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 &= 0xFFFFFF;
+
+ ((u32 *) (info->pseudo_palette))[regno] = value;
+
+ }
+
+ return 0;
+}
+
+static struct fb_ops bfin_lq035q1_fb_ops = {
+ .owner = THIS_MODULE,
+ .fb_open = bfin_lq035q1_fb_open,
+ .fb_release = bfin_lq035q1_fb_release,
+ .fb_check_var = bfin_lq035q1_fb_check_var,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+ .fb_mmap = bfin_lq035q1_fb_mmap,
+ .fb_cursor = bfin_lq035q1_fb_cursor,
+ .fb_setcolreg = bfin_lq035q1_fb_setcolreg,
+};
+
+static irqreturn_t bfin_lq035q1_irq_error(int irq, void *dev_id)
+{
+ /*struct bfin_lq035q1fb_info *info = (struct bfin_lq035q1fb_info *)dev_id;*/
+
+ u16 status = bfin_read_PPI_STATUS();
+ bfin_write_PPI_STATUS(-1);
+
+ if (status) {
+ bfin_lq035q1_disable_ppi();
+ disable_dma(CH_PPI);
+
+ /* start dma */
+ enable_dma(CH_PPI);
+ bfin_lq035q1_enable_ppi();
+ bfin_write_PPI_STATUS(-1);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int __devinit bfin_lq035q1_probe(struct platform_device *pdev)
+{
+ struct bfin_lq035q1fb_info *info;
+ struct fb_info *fbinfo;
+ int ret;
+
+ ret = request_dma(CH_PPI, "CH_PPI");
+ if (ret < 0) {
+ pr_err("couldn't request CH_PPI DMA\n");
+ goto out1;
+ }
+
+ fbinfo =
+ framebuffer_alloc(sizeof(struct bfin_lq035q1fb_info), &pdev->dev);
+ if (!fbinfo) {
+ ret = -ENOMEM;
+ goto out2;
+ }
+
+ info = fbinfo->par;
+ info->fb = fbinfo;
+ info->dev = &pdev->dev;
+
+ info->disp_info = pdev->dev.platform_data;
+
+ spi_control.mode = (info->disp_info->mode &
+ LQ035_DRIVER_OUTPUT_MASK) | LQ035_DRIVER_OUTPUT_DEFAULT;
+
+ platform_set_drvdata(pdev, fbinfo);
+
+ strcpy(fbinfo->fix.id, driver_name);
+
+ fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
+ fbinfo->fix.type_aux = 0;
+ fbinfo->fix.xpanstep = 0;
+ fbinfo->fix.ypanstep = 0;
+ fbinfo->fix.ywrapstep = 0;
+ fbinfo->fix.accel = FB_ACCEL_NONE;
+ fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
+
+ fbinfo->var.nonstd = 0;
+ fbinfo->var.activate = FB_ACTIVATE_NOW;
+ fbinfo->var.height = -1;
+ fbinfo->var.width = -1;
+ fbinfo->var.accel_flags = 0;
+ fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
+
+ fbinfo->var.xres = LCD_X_RES;
+ fbinfo->var.xres_virtual = LCD_X_RES;
+ fbinfo->var.yres = LCD_Y_RES;
+ fbinfo->var.yres_virtual = LCD_Y_RES;
+ fbinfo->var.bits_per_pixel = LCD_BPP;
+
+ if (info->disp_info->mode & LQ035_BGR) {
+#if (LCD_BPP == 24)
+ fbinfo->var.red.offset = 0;
+ fbinfo->var.green.offset = 8;
+ fbinfo->var.blue.offset = 16;
+#else
+ fbinfo->var.red.offset = 0;
+ fbinfo->var.green.offset = 5;
+ fbinfo->var.blue.offset = 11;
+#endif
+ } else {
+#if (LCD_BPP == 24)
+ fbinfo->var.red.offset = 16;
+ fbinfo->var.green.offset = 8;
+ fbinfo->var.blue.offset = 0;
+#else
+ fbinfo->var.red.offset = 11;
+ fbinfo->var.green.offset = 5;
+ fbinfo->var.blue.offset = 0;
+#endif
+ }
+
+ fbinfo->var.transp.offset = 0;
+
+#if (LCD_BPP == 24)
+ fbinfo->var.red.length = 8;
+ fbinfo->var.green.length = 8;
+ fbinfo->var.blue.length = 8;
+#else
+ fbinfo->var.red.length = 5;
+ fbinfo->var.green.length = 6;
+ fbinfo->var.blue.length = 5;
+#endif
+
+ fbinfo->var.transp.length = 0;
+
+ fbinfo->fix.smem_len = LCD_X_RES * LCD_Y_RES * LCD_BPP / 8
+ + ACTIVE_VIDEO_MEM_OFFSET;
+
+ fbinfo->fix.line_length = fbinfo->var.xres_virtual *
+ fbinfo->var.bits_per_pixel / 8;
+
+
+ fbinfo->fbops = &bfin_lq035q1_fb_ops;
+ fbinfo->flags = FBINFO_FLAG_DEFAULT;
+
+ info->fb_buffer =
+ dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
+ GFP_KERNEL);
+
+ if (NULL == info->fb_buffer) {
+ pr_err("couldn't allocate dma buffer\n");
+ ret = -ENOMEM;
+ goto out3;
+ }
+
+ fbinfo->screen_base = (void *)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
+ fbinfo->fix.smem_start = (int)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
+
+ fbinfo->fbops = &bfin_lq035q1_fb_ops;
+
+ fbinfo->pseudo_palette = &info->pseudo_pal;
+
+ ret = fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0);
+ if (ret < 0) {
+ pr_err("failed to allocate colormap (%d entries)\n",
+ BFIN_LCD_NBR_PALETTE_ENTRIES);
+ goto out4;
+ }
+
+ ret = bfin_lq035q1_request_ports(1);
+ if (ret) {
+ pr_err("couldn't request gpio port\n");
+ goto out6;
+ }
+
+ info->irq = platform_get_irq(pdev, 0);
+ if (info->irq < 0) {
+ ret = -EINVAL;
+ goto out7;
+ }
+
+ ret = request_irq(info->irq, bfin_lq035q1_irq_error, IRQF_DISABLED,
+ "PPI ERROR", info);
+ if (ret < 0) {
+ pr_err("unable to request PPI ERROR IRQ\n");
+ goto out7;
+ }
+
+ ret = spi_register_driver(&spidev_spi);
+ if (ret < 0) {
+ pr_err("couldn't register SPI Interface\n");
+ goto out8;
+ }
+
+ if (info->disp_info->use_bl) {
+ ret = gpio_request(info->disp_info->gpio_bl, "LQ035 Backlight");
+
+ if (ret) {
+ pr_err("failed to request GPIO %d\n",
+ info->disp_info->gpio_bl);
+ goto out9;
+ }
+ gpio_direction_output(info->disp_info->gpio_bl, 0);
+ }
+
+ ret = register_framebuffer(fbinfo);
+ if (ret < 0) {
+ pr_err("unable to register framebuffer\n");
+ goto out10;
+ }
+
+ pr_info("%dx%d %d-bit RGB FrameBuffer initialized\n",
+ LCD_X_RES, LCD_Y_RES, LCD_BPP);
+
+ return 0;
+
+out10:
+ if (info->disp_info->use_bl)
+ gpio_free(info->disp_info->gpio_bl);
+out9:
+ spi_unregister_driver(&spidev_spi);
+out8:
+ free_irq(info->irq, info);
+out7:
+ bfin_lq035q1_request_ports(0);
+out6:
+ fb_dealloc_cmap(&fbinfo->cmap);
+out4:
+ dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
+ info->dma_handle);
+out3:
+ framebuffer_release(fbinfo);
+out2:
+ free_dma(CH_PPI);
+out1:
+ platform_set_drvdata(pdev, NULL);
+
+ return ret;
+}
+
+static int __devexit bfin_lq035q1_remove(struct platform_device *pdev)
+{
+ struct fb_info *fbinfo = platform_get_drvdata(pdev);
+ struct bfin_lq035q1fb_info *info = fbinfo->par;
+
+ if (info->disp_info->use_bl)
+ gpio_free(info->disp_info->gpio_bl);
+
+ spi_unregister_driver(&spidev_spi);
+
+ unregister_framebuffer(fbinfo);
+
+ free_dma(CH_PPI);
+ free_irq(info->irq, info);
+
+ if (info->fb_buffer != NULL)
+ dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
+ info->dma_handle);
+
+ fb_dealloc_cmap(&fbinfo->cmap);
+
+ bfin_lq035q1_request_ports(0);
+
+ platform_set_drvdata(pdev, NULL);
+ framebuffer_release(fbinfo);
+
+ pr_info("unregistered LCD driver\n");
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int bfin_lq035q1_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct fb_info *fbinfo = platform_get_drvdata(pdev);
+ struct bfin_lq035q1fb_info *info = fbinfo->par;
+
+ if (info->lq035_open_cnt) {
+ lq035q1_backlight(info, 0);
+ bfin_lq035q1_disable_ppi();
+ SSYNC();
+ disable_dma(CH_PPI);
+ bfin_lq035q1_stop_timers();
+ bfin_write_PPI_STATUS(-1);
+ }
+
+ return 0;
+}
+
+static int bfin_lq035q1_resume(struct platform_device *pdev)
+{
+ struct fb_info *fbinfo = platform_get_drvdata(pdev);
+ struct bfin_lq035q1fb_info *info = fbinfo->par;
+
+ if (info->lq035_open_cnt) {
+ bfin_lq035q1_disable_ppi();
+ SSYNC();
+
+ bfin_lq035q1_config_dma(info);
+ bfin_lq035q1_config_ppi(info);
+ bfin_lq035q1_init_timers();
+
+ /* start dma */
+ enable_dma(CH_PPI);
+ bfin_lq035q1_enable_ppi();
+ bfin_lq035q1_start_timers();
+ lq035q1_backlight(info, 1);
+ }
+
+ return 0;
+}
+#else
+#define bfin_lq035q1_suspend NULL
+#define bfin_lq035q1_resume NULL
+#endif
+
+static struct platform_driver bfin_lq035q1_driver = {
+ .probe = bfin_lq035q1_probe,
+ .remove = __devexit_p(bfin_lq035q1_remove),
+ .suspend = bfin_lq035q1_suspend,
+ .resume = bfin_lq035q1_resume,
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init bfin_lq035q1_driver_init(void)
+{
+ return platform_driver_register(&bfin_lq035q1_driver);
+}
+module_init(bfin_lq035q1_driver_init);
+
+static void __exit bfin_lq035q1_driver_cleanup(void)
+{
+ platform_driver_unregister(&bfin_lq035q1_driver);
+}
+module_exit(bfin_lq035q1_driver_cleanup);
+
+MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
+MODULE_LICENSE("GPL");
--
1.6.4.2


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  Last update: 2009-09-14 21:07    [from the cache]
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