mirror of https://gitee.com/openkylin/linux.git
865 lines
21 KiB
C
865 lines
21 KiB
C
/*
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* Blackfin LCD Framebuffer driver SHARP LQ035Q1DH02
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*
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* Copyright 2008-2009 Analog Devices Inc.
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* Licensed under the GPL-2 or later.
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*/
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#define DRIVER_NAME "bfin-lq035q1"
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#define pr_fmt(fmt) DRIVER_NAME ": " fmt
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/fb.h>
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#include <linux/gpio.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/device.h>
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#include <linux/backlight.h>
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#include <linux/lcd.h>
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#include <linux/dma-mapping.h>
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#include <linux/platform_device.h>
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#include <linux/spi/spi.h>
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#include <asm/blackfin.h>
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#include <asm/irq.h>
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#include <asm/dma.h>
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#include <asm/portmux.h>
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#include <asm/gptimers.h>
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#include <asm/bfin-lq035q1.h>
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#if defined(BF533_FAMILY) || defined(BF538_FAMILY)
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#define TIMER_HSYNC_id TIMER1_id
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#define TIMER_HSYNCbit TIMER1bit
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#define TIMER_HSYNC_STATUS_TRUN TIMER_STATUS_TRUN1
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#define TIMER_HSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL1
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#define TIMER_HSYNC_STATUS_TOVF TIMER_STATUS_TOVF1
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#define TIMER_VSYNC_id TIMER2_id
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#define TIMER_VSYNCbit TIMER2bit
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#define TIMER_VSYNC_STATUS_TRUN TIMER_STATUS_TRUN2
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#define TIMER_VSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL2
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#define TIMER_VSYNC_STATUS_TOVF TIMER_STATUS_TOVF2
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#else
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#define TIMER_HSYNC_id TIMER0_id
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#define TIMER_HSYNCbit TIMER0bit
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#define TIMER_HSYNC_STATUS_TRUN TIMER_STATUS_TRUN0
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#define TIMER_HSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL0
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#define TIMER_HSYNC_STATUS_TOVF TIMER_STATUS_TOVF0
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#define TIMER_VSYNC_id TIMER1_id
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#define TIMER_VSYNCbit TIMER1bit
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#define TIMER_VSYNC_STATUS_TRUN TIMER_STATUS_TRUN1
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#define TIMER_VSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL1
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#define TIMER_VSYNC_STATUS_TOVF TIMER_STATUS_TOVF1
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#endif
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#define LCD_X_RES 320 /* Horizontal Resolution */
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#define LCD_Y_RES 240 /* Vertical Resolution */
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#define DMA_BUS_SIZE 16
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#define U_LINE 4 /* Blanking Lines */
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/* Interface 16/18-bit TFT over an 8-bit wide PPI using a small Programmable Logic Device (CPLD)
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* http://blackfin.uclinux.org/gf/project/stamp/frs/?action=FrsReleaseBrowse&frs_package_id=165
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*/
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#define BFIN_LCD_NBR_PALETTE_ENTRIES 256
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#define PPI_TX_MODE 0x2
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#define PPI_XFER_TYPE_11 0xC
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#define PPI_PORT_CFG_01 0x10
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#define PPI_POLS_1 0x8000
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#define LQ035_INDEX 0x74
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#define LQ035_DATA 0x76
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#define LQ035_DRIVER_OUTPUT_CTL 0x1
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#define LQ035_SHUT_CTL 0x11
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#define LQ035_DRIVER_OUTPUT_MASK (LQ035_LR | LQ035_TB | LQ035_BGR | LQ035_REV)
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#define LQ035_DRIVER_OUTPUT_DEFAULT (0x2AEF & ~LQ035_DRIVER_OUTPUT_MASK)
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#define LQ035_SHUT (1 << 0) /* Shutdown */
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#define LQ035_ON (0 << 0) /* Shutdown */
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struct bfin_lq035q1fb_info {
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struct fb_info *fb;
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struct device *dev;
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struct spi_driver spidrv;
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struct bfin_lq035q1fb_disp_info *disp_info;
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unsigned char *fb_buffer; /* RGB Buffer */
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dma_addr_t dma_handle;
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int lq035_open_cnt;
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int irq;
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spinlock_t lock; /* lock */
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u32 pseudo_pal[16];
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u32 lcd_bpp;
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u32 h_actpix;
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u32 h_period;
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u32 h_pulse;
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u32 h_start;
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u32 v_lines;
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u32 v_pulse;
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u32 v_period;
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};
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static int nocursor;
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module_param(nocursor, int, 0644);
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MODULE_PARM_DESC(nocursor, "cursor enable/disable");
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struct spi_control {
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unsigned short mode;
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};
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static int lq035q1_control(struct spi_device *spi, unsigned char reg, unsigned short value)
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{
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int ret;
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u8 regs[3] = { LQ035_INDEX, 0, 0 };
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u8 dat[3] = { LQ035_DATA, 0, 0 };
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if (!spi)
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return -ENODEV;
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regs[2] = reg;
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dat[1] = value >> 8;
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dat[2] = value & 0xFF;
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ret = spi_write(spi, regs, ARRAY_SIZE(regs));
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ret |= spi_write(spi, dat, ARRAY_SIZE(dat));
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return ret;
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}
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static int lq035q1_spidev_probe(struct spi_device *spi)
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{
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int ret;
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struct spi_control *ctl;
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struct bfin_lq035q1fb_info *info = container_of(spi->dev.driver,
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struct bfin_lq035q1fb_info,
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spidrv.driver);
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ctl = kzalloc(sizeof(*ctl), GFP_KERNEL);
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if (!ctl)
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return -ENOMEM;
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ctl->mode = (info->disp_info->mode &
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LQ035_DRIVER_OUTPUT_MASK) | LQ035_DRIVER_OUTPUT_DEFAULT;
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ret = lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_ON);
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ret |= lq035q1_control(spi, LQ035_DRIVER_OUTPUT_CTL, ctl->mode);
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if (ret) {
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kfree(ctl);
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return ret;
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}
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spi_set_drvdata(spi, ctl);
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return 0;
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}
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static int lq035q1_spidev_remove(struct spi_device *spi)
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{
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return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
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}
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#ifdef CONFIG_PM_SLEEP
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static int lq035q1_spidev_suspend(struct device *dev)
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{
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struct spi_device *spi = to_spi_device(dev);
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return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
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}
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static int lq035q1_spidev_resume(struct device *dev)
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{
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struct spi_device *spi = to_spi_device(dev);
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struct spi_control *ctl = spi_get_drvdata(spi);
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int ret;
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ret = lq035q1_control(spi, LQ035_DRIVER_OUTPUT_CTL, ctl->mode);
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if (ret)
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return ret;
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return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_ON);
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}
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static SIMPLE_DEV_PM_OPS(lq035q1_spidev_pm_ops, lq035q1_spidev_suspend,
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lq035q1_spidev_resume);
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#define LQ035Q1_SPIDEV_PM_OPS (&lq035q1_spidev_pm_ops)
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#else
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#define LQ035Q1_SPIDEV_PM_OPS NULL
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#endif
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/* Power down all displays on reboot, poweroff or halt */
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static void lq035q1_spidev_shutdown(struct spi_device *spi)
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{
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lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
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}
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static int lq035q1_backlight(struct bfin_lq035q1fb_info *info, unsigned arg)
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{
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if (info->disp_info->use_bl)
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gpio_set_value(info->disp_info->gpio_bl, arg);
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return 0;
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}
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static int bfin_lq035q1_calc_timing(struct bfin_lq035q1fb_info *fbi)
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{
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unsigned long clocks_per_pix, cpld_pipeline_delay_cor;
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/*
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* Interface 16/18-bit TFT over an 8-bit wide PPI using a small
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* Programmable Logic Device (CPLD)
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* http://blackfin.uclinux.org/gf/project/stamp/frs/?action=FrsReleaseBrowse&frs_package_id=165
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*/
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switch (fbi->disp_info->ppi_mode) {
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case USE_RGB565_16_BIT_PPI:
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fbi->lcd_bpp = 16;
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clocks_per_pix = 1;
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cpld_pipeline_delay_cor = 0;
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break;
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case USE_RGB565_8_BIT_PPI:
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fbi->lcd_bpp = 16;
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clocks_per_pix = 2;
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cpld_pipeline_delay_cor = 3;
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break;
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case USE_RGB888_8_BIT_PPI:
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fbi->lcd_bpp = 24;
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clocks_per_pix = 3;
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cpld_pipeline_delay_cor = 5;
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break;
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default:
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return -EINVAL;
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}
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/*
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* HS and VS timing parameters (all in number of PPI clk ticks)
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*/
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fbi->h_actpix = (LCD_X_RES * clocks_per_pix); /* active horizontal pixel */
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fbi->h_period = (336 * clocks_per_pix); /* HS period */
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fbi->h_pulse = (2 * clocks_per_pix); /* HS pulse width */
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fbi->h_start = (7 * clocks_per_pix + cpld_pipeline_delay_cor); /* first valid pixel */
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fbi->v_lines = (LCD_Y_RES + U_LINE); /* total vertical lines */
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fbi->v_pulse = (2 * clocks_per_pix); /* VS pulse width (1-5 H_PERIODs) */
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fbi->v_period = (fbi->h_period * fbi->v_lines); /* VS period */
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return 0;
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}
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static void bfin_lq035q1_config_ppi(struct bfin_lq035q1fb_info *fbi)
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{
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unsigned ppi_pmode;
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if (fbi->disp_info->ppi_mode == USE_RGB565_16_BIT_PPI)
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ppi_pmode = DLEN_16;
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else
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ppi_pmode = (DLEN_8 | PACK_EN);
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bfin_write_PPI_DELAY(fbi->h_start);
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bfin_write_PPI_COUNT(fbi->h_actpix - 1);
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bfin_write_PPI_FRAME(fbi->v_lines);
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bfin_write_PPI_CONTROL(PPI_TX_MODE | /* output mode , PORT_DIR */
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PPI_XFER_TYPE_11 | /* sync mode XFR_TYPE */
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PPI_PORT_CFG_01 | /* two frame sync PORT_CFG */
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ppi_pmode | /* 8/16 bit data length / PACK_EN? */
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PPI_POLS_1); /* faling edge syncs POLS */
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}
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static inline void bfin_lq035q1_disable_ppi(void)
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{
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bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
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}
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static inline void bfin_lq035q1_enable_ppi(void)
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{
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bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
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}
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static void bfin_lq035q1_start_timers(void)
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{
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enable_gptimers(TIMER_VSYNCbit | TIMER_HSYNCbit);
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}
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static void bfin_lq035q1_stop_timers(void)
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{
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disable_gptimers(TIMER_HSYNCbit | TIMER_VSYNCbit);
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set_gptimer_status(0, TIMER_HSYNC_STATUS_TRUN | TIMER_VSYNC_STATUS_TRUN |
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TIMER_HSYNC_STATUS_TIMIL | TIMER_VSYNC_STATUS_TIMIL |
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TIMER_HSYNC_STATUS_TOVF | TIMER_VSYNC_STATUS_TOVF);
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}
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static void bfin_lq035q1_init_timers(struct bfin_lq035q1fb_info *fbi)
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{
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bfin_lq035q1_stop_timers();
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set_gptimer_period(TIMER_HSYNC_id, fbi->h_period);
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set_gptimer_pwidth(TIMER_HSYNC_id, fbi->h_pulse);
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set_gptimer_config(TIMER_HSYNC_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
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TIMER_TIN_SEL | TIMER_CLK_SEL|
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TIMER_EMU_RUN);
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set_gptimer_period(TIMER_VSYNC_id, fbi->v_period);
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set_gptimer_pwidth(TIMER_VSYNC_id, fbi->v_pulse);
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set_gptimer_config(TIMER_VSYNC_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
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TIMER_TIN_SEL | TIMER_CLK_SEL |
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TIMER_EMU_RUN);
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}
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static void bfin_lq035q1_config_dma(struct bfin_lq035q1fb_info *fbi)
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{
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set_dma_config(CH_PPI,
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set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
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INTR_DISABLE, DIMENSION_2D,
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DATA_SIZE_16,
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DMA_NOSYNC_KEEP_DMA_BUF));
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set_dma_x_count(CH_PPI, (LCD_X_RES * fbi->lcd_bpp) / DMA_BUS_SIZE);
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set_dma_x_modify(CH_PPI, DMA_BUS_SIZE / 8);
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set_dma_y_count(CH_PPI, fbi->v_lines);
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set_dma_y_modify(CH_PPI, DMA_BUS_SIZE / 8);
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set_dma_start_addr(CH_PPI, (unsigned long)fbi->fb_buffer);
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}
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static const u16 ppi0_req_16[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
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P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
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P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
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P_PPI0_D6, P_PPI0_D7, P_PPI0_D8,
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P_PPI0_D9, P_PPI0_D10, P_PPI0_D11,
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P_PPI0_D12, P_PPI0_D13, P_PPI0_D14,
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P_PPI0_D15, 0};
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static const u16 ppi0_req_8[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
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P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
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P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
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P_PPI0_D6, P_PPI0_D7, 0};
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static inline void bfin_lq035q1_free_ports(unsigned ppi16)
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{
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if (ppi16)
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peripheral_free_list(ppi0_req_16);
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else
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peripheral_free_list(ppi0_req_8);
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if (ANOMALY_05000400)
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gpio_free(P_IDENT(P_PPI0_FS3));
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}
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static int bfin_lq035q1_request_ports(struct platform_device *pdev,
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unsigned ppi16)
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{
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int ret;
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/* ANOMALY_05000400 - PPI Does Not Start Properly In Specific Mode:
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* Drive PPI_FS3 Low
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*/
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if (ANOMALY_05000400) {
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int ret = gpio_request_one(P_IDENT(P_PPI0_FS3),
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GPIOF_OUT_INIT_LOW, "PPI_FS3");
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if (ret)
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return ret;
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}
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if (ppi16)
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ret = peripheral_request_list(ppi0_req_16, DRIVER_NAME);
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else
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ret = peripheral_request_list(ppi0_req_8, DRIVER_NAME);
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if (ret) {
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dev_err(&pdev->dev, "requesting peripherals failed\n");
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return -EFAULT;
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}
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return 0;
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}
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static int bfin_lq035q1_fb_open(struct fb_info *info, int user)
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{
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struct bfin_lq035q1fb_info *fbi = info->par;
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spin_lock(&fbi->lock);
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fbi->lq035_open_cnt++;
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if (fbi->lq035_open_cnt <= 1) {
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bfin_lq035q1_disable_ppi();
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SSYNC();
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bfin_lq035q1_config_dma(fbi);
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bfin_lq035q1_config_ppi(fbi);
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bfin_lq035q1_init_timers(fbi);
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/* start dma */
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enable_dma(CH_PPI);
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bfin_lq035q1_enable_ppi();
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bfin_lq035q1_start_timers();
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lq035q1_backlight(fbi, 1);
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}
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spin_unlock(&fbi->lock);
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return 0;
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}
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static int bfin_lq035q1_fb_release(struct fb_info *info, int user)
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{
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struct bfin_lq035q1fb_info *fbi = info->par;
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spin_lock(&fbi->lock);
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fbi->lq035_open_cnt--;
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if (fbi->lq035_open_cnt <= 0) {
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lq035q1_backlight(fbi, 0);
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bfin_lq035q1_disable_ppi();
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SSYNC();
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disable_dma(CH_PPI);
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bfin_lq035q1_stop_timers();
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}
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spin_unlock(&fbi->lock);
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return 0;
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}
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static int bfin_lq035q1_fb_check_var(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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struct bfin_lq035q1fb_info *fbi = info->par;
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if (var->bits_per_pixel == fbi->lcd_bpp) {
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var->red.offset = info->var.red.offset;
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var->green.offset = info->var.green.offset;
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var->blue.offset = info->var.blue.offset;
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var->red.length = info->var.red.length;
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var->green.length = info->var.green.length;
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var->blue.length = info->var.blue.length;
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var->transp.offset = 0;
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var->transp.length = 0;
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|
var->transp.msb_right = 0;
|
|
var->red.msb_right = 0;
|
|
var->green.msb_right = 0;
|
|
var->blue.msb_right = 0;
|
|
} else {
|
|
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;
|
|
}
|
|
|
|
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_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 bfin_lq035q1_probe(struct platform_device *pdev)
|
|
{
|
|
struct bfin_lq035q1fb_info *info;
|
|
struct fb_info *fbinfo;
|
|
u32 active_video_mem_offset;
|
|
int ret;
|
|
|
|
ret = request_dma(CH_PPI, DRIVER_NAME"_CH_PPI");
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "PPI DMA unavailable\n");
|
|
goto out1;
|
|
}
|
|
|
|
fbinfo = framebuffer_alloc(sizeof(*info), &pdev->dev);
|
|
if (!fbinfo) {
|
|
ret = -ENOMEM;
|
|
goto out2;
|
|
}
|
|
|
|
info = fbinfo->par;
|
|
info->fb = fbinfo;
|
|
info->dev = &pdev->dev;
|
|
spin_lock_init(&info->lock);
|
|
|
|
info->disp_info = pdev->dev.platform_data;
|
|
|
|
platform_set_drvdata(pdev, fbinfo);
|
|
|
|
ret = bfin_lq035q1_calc_timing(info);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "Failed PPI Mode\n");
|
|
goto out3;
|
|
}
|
|
|
|
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 = info->lcd_bpp;
|
|
|
|
if (info->disp_info->mode & LQ035_BGR) {
|
|
if (info->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;
|
|
}
|
|
} else {
|
|
if (info->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;
|
|
}
|
|
}
|
|
|
|
fbinfo->var.transp.offset = 0;
|
|
|
|
if (info->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;
|
|
}
|
|
|
|
fbinfo->var.transp.length = 0;
|
|
|
|
active_video_mem_offset = ((U_LINE / 2) * LCD_X_RES * (info->lcd_bpp / 8));
|
|
|
|
fbinfo->fix.smem_len = LCD_X_RES * LCD_Y_RES * info->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) {
|
|
dev_err(&pdev->dev, "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) {
|
|
dev_err(&pdev->dev, "failed to allocate colormap (%d entries)\n",
|
|
BFIN_LCD_NBR_PALETTE_ENTRIES);
|
|
goto out4;
|
|
}
|
|
|
|
ret = bfin_lq035q1_request_ports(pdev,
|
|
info->disp_info->ppi_mode == USE_RGB565_16_BIT_PPI);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "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, 0,
|
|
DRIVER_NAME" PPI ERROR", info);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "unable to request PPI ERROR IRQ\n");
|
|
goto out7;
|
|
}
|
|
|
|
info->spidrv.driver.name = DRIVER_NAME"-spi";
|
|
info->spidrv.probe = lq035q1_spidev_probe;
|
|
info->spidrv.remove = lq035q1_spidev_remove;
|
|
info->spidrv.shutdown = lq035q1_spidev_shutdown;
|
|
info->spidrv.driver.pm = LQ035Q1_SPIDEV_PM_OPS;
|
|
|
|
ret = spi_register_driver(&info->spidrv);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "couldn't register SPI Interface\n");
|
|
goto out8;
|
|
}
|
|
|
|
if (info->disp_info->use_bl) {
|
|
ret = gpio_request_one(info->disp_info->gpio_bl,
|
|
GPIOF_OUT_INIT_LOW, "LQ035 Backlight");
|
|
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to request GPIO %d\n",
|
|
info->disp_info->gpio_bl);
|
|
goto out9;
|
|
}
|
|
}
|
|
|
|
ret = register_framebuffer(fbinfo);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "unable to register framebuffer\n");
|
|
goto out10;
|
|
}
|
|
|
|
dev_info(&pdev->dev, "%dx%d %d-bit RGB FrameBuffer initialized\n",
|
|
LCD_X_RES, LCD_Y_RES, info->lcd_bpp);
|
|
|
|
return 0;
|
|
|
|
out10:
|
|
if (info->disp_info->use_bl)
|
|
gpio_free(info->disp_info->gpio_bl);
|
|
out9:
|
|
spi_unregister_driver(&info->spidrv);
|
|
out8:
|
|
free_irq(info->irq, info);
|
|
out7:
|
|
bfin_lq035q1_free_ports(info->disp_info->ppi_mode ==
|
|
USE_RGB565_16_BIT_PPI);
|
|
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:
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int 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(&info->spidrv);
|
|
|
|
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_free_ports(info->disp_info->ppi_mode ==
|
|
USE_RGB565_16_BIT_PPI);
|
|
|
|
framebuffer_release(fbinfo);
|
|
|
|
dev_info(&pdev->dev, "unregistered LCD driver\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int bfin_lq035q1_suspend(struct device *dev)
|
|
{
|
|
struct fb_info *fbinfo = dev_get_drvdata(dev);
|
|
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 device *dev)
|
|
{
|
|
struct fb_info *fbinfo = dev_get_drvdata(dev);
|
|
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(info);
|
|
|
|
/* start dma */
|
|
enable_dma(CH_PPI);
|
|
bfin_lq035q1_enable_ppi();
|
|
bfin_lq035q1_start_timers();
|
|
lq035q1_backlight(info, 1);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct dev_pm_ops bfin_lq035q1_dev_pm_ops = {
|
|
.suspend = bfin_lq035q1_suspend,
|
|
.resume = bfin_lq035q1_resume,
|
|
};
|
|
#endif
|
|
|
|
static struct platform_driver bfin_lq035q1_driver = {
|
|
.probe = bfin_lq035q1_probe,
|
|
.remove = bfin_lq035q1_remove,
|
|
.driver = {
|
|
.name = DRIVER_NAME,
|
|
#ifdef CONFIG_PM
|
|
.pm = &bfin_lq035q1_dev_pm_ops,
|
|
#endif
|
|
},
|
|
};
|
|
|
|
module_platform_driver(bfin_lq035q1_driver);
|
|
|
|
MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
|
|
MODULE_LICENSE("GPL");
|