diff options
Diffstat (limited to 'drivers/video/mxc/mxcfb_epson.c')
| -rw-r--r-- | drivers/video/mxc/mxcfb_epson.c | 1153 |
1 files changed, 1153 insertions, 0 deletions
diff --git a/drivers/video/mxc/mxcfb_epson.c b/drivers/video/mxc/mxcfb_epson.c new file mode 100644 index 000000000000..2b9bbec8a7e4 --- /dev/null +++ b/drivers/video/mxc/mxcfb_epson.c @@ -0,0 +1,1153 @@ +/* + * Copyright 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +/*! + * @file mxcfb_epson.c + * + * @brief MXC Frame buffer driver for ADC + * + * @ingroup Framebuffer + */ + +/*! + * Include files + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <linux/fb.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> +#include <mach/hardware.h> +#include <asm/io.h> +#include <asm/mach-types.h> +#include <asm/uaccess.h> +#include <mach/ipu.h> +#include <mach/mxcfb.h> + +#define PARTIAL_REFRESH +#define MXCFB_REFRESH_DEFAULT MXCFB_REFRESH_PARTIAL +/* + * Driver name + */ +#define MXCFB_NAME "MXCFB_EPSON" + +#define MXCFB_SCREEN_TOP_OFFSET 0 +#define MXCFB_SCREEN_LEFT_OFFSET 2 +#define MXCFB_SCREEN_WIDTH 176 +#define MXCFB_SCREEN_HEIGHT 220 + +/*! + * Enum defining Epson panel commands. + */ +enum { + DISON = 0xAF, + DISOFF = 0xAE, + DISCTL = 0xCA, + SD_CSET = 0x15, + SD_PSET = 0x75, + DATCTL = 0xBC, + SLPIN = 0x95, + SLPOUT = 0x94, + DISNOR = 0xA6, + RAMWR = 0x5C, + VOLCTR = 0xC6, + GCP16 = 0xCC, + GCP64 = 0xCB, +}; + +struct mxcfb_info { + int open_count; + int blank; + uint32_t disp_num; + + u32 pseudo_palette[16]; + + int32_t cur_update_mode; + dma_addr_t alloc_start_paddr; + void *alloc_start_vaddr; + u32 alloc_size; + uint32_t snoop_window_size; +}; + +struct mxcfb_data { + struct fb_info *fbi; + volatile int32_t vsync_flag; + wait_queue_head_t vsync_wq; + wait_queue_head_t suspend_wq; + bool suspended; +}; + +static struct mxcfb_data mxcfb_drv_data; +static unsigned long default_bpp = 16; + +void slcd_gpio_config(void); +extern void gpio_lcd_active(void); +static int mxcfb_blank(int blank, struct fb_info *fbi); + +static uint32_t bpp_to_pixfmt(int bpp) +{ + uint32_t pixfmt = 0; + switch (bpp) { + case 24: + pixfmt = IPU_PIX_FMT_BGR24; + break; + case 32: + pixfmt = IPU_PIX_FMT_BGR32; + break; + case 16: + pixfmt = IPU_PIX_FMT_RGB565; + break; + } + return pixfmt; +} + +/*! + * This function sets display region in the Epson panel + * + * @param disp display panel to config + * @param x1 x-coordinate of one vertex. + * @param x2 x-coordinate of second vertex. + * @param y1 y-coordinate of one vertex. + * @param y2 y-coordinate of second vertex. + */ +void set_panel_region(int disp, uint32_t x1, uint32_t x2, + uint32_t y1, uint32_t y2) +{ + uint32_t param[8]; + + memset(param, 0, sizeof(uint32_t) * 8); + param[0] = x1; + param[2] = x2; + param[4] = y1; + param[6] = y2; + + /* SD_CSET */ + ipu_adc_write_cmd(disp, CMD, SD_CSET, param, 4); + + /* SD_PSET */ + ipu_adc_write_cmd(disp, CMD, SD_PSET, &(param[4]), 4); +} + +/*! + * Function to create and initiate template command buffer for ADC. This + * template will be written to Panel memory. + */ +static void init_channel_template(int disp) +{ + /* template command buffer for ADC is 32 */ + uint32_t tempCmd[TEMPLATE_BUF_SIZE]; + uint32_t i = 0; + + memset(tempCmd, 0, sizeof(uint32_t) * TEMPLATE_BUF_SIZE); + /* setup update display region */ + /* whole the screen during init */ + /*WRITE Y COORDINATE CMND */ + tempCmd[i++] = ipu_adc_template_gen(WR_CMND, 0, SINGLE_STEP, SD_PSET); + /*WRITE Y START ADDRESS CMND LSB[22:8] */ + tempCmd[i++] = ipu_adc_template_gen(WR_YADDR, 1, SINGLE_STEP, 0x01); + /*WRITE Y START ADDRESS CMND MSB[22:16] */ + tempCmd[i++] = ipu_adc_template_gen(WR_YADDR, 1, SINGLE_STEP, 0x09); + /*WRITE Y STOP ADDRESS CMND LSB */ + tempCmd[i++] = ipu_adc_template_gen(WR_CMND, 1, SINGLE_STEP, + MXCFB_SCREEN_HEIGHT - 1); + /*WRITE Y STOP ADDRESS CMND MSB */ + tempCmd[i++] = ipu_adc_template_gen(WR_CMND, 1, SINGLE_STEP, 0); + /*WRITE X COORDINATE CMND */ + tempCmd[i++] = ipu_adc_template_gen(WR_CMND, 0, SINGLE_STEP, SD_CSET); + /*WRITE X ADDRESS CMND LSB[7:0] */ + tempCmd[i++] = ipu_adc_template_gen(WR_XADDR, 1, SINGLE_STEP, 0x01); + /*WRITE X ADDRESS CMND MSB[22:8] */ + tempCmd[i++] = ipu_adc_template_gen(WR_CMND, 1, SINGLE_STEP, 0); + /*WRITE X STOP ADDRESS CMND LSB */ + tempCmd[i++] = ipu_adc_template_gen(WR_CMND, 1, SINGLE_STEP, + MXCFB_SCREEN_WIDTH + 1); + /*WRITE X STOP ADDRESS CMND MSB */ + tempCmd[i++] = ipu_adc_template_gen(WR_CMND, 1, SINGLE_STEP, 0); + /*WRITE MEMORY CMND MSB */ + tempCmd[i++] = ipu_adc_template_gen(WR_CMND, 0, SINGLE_STEP, RAMWR); + /*WRITE DATA CMND and STP */ + tempCmd[i++] = ipu_adc_template_gen(WR_DATA, 1, STOP, 0); + + ipu_adc_write_template(disp, tempCmd, true); +} + +/*! + * Function to initialize the panel. First it resets the panel and then + * initilizes panel. + */ +static void _init_panel(int disp) +{ + uint32_t cmd_param; + uint32_t i; + + gpio_lcd_active(); + slcd_gpio_config(); + + /* DATCTL */ +#ifdef CONFIG_FB_MXC_ASYNC_PANEL_IFC_16_BIT + /* 16-bit 565 mode */ + cmd_param = 0x28; +#else + /* 8-bit 666 mode */ + cmd_param = 0x08; +#endif + ipu_adc_write_cmd(disp, CMD, DATCTL, &cmd_param, 1); + + /* Sleep OUT */ + ipu_adc_write_cmd(disp, CMD, SLPOUT, 0, 0); + + /* Set display to white + Setup page and column addresses */ + set_panel_region(disp, MXCFB_SCREEN_LEFT_OFFSET, + MXCFB_SCREEN_WIDTH + MXCFB_SCREEN_LEFT_OFFSET - 1, + 0, MXCFB_SCREEN_HEIGHT - 1); + /* Do RAM write cmd */ + ipu_adc_write_cmd(disp, CMD, RAMWR, 0, 0); +#ifdef CONFIG_FB_MXC_ASYNC_PANEL_IFC_16_BIT + for (i = 0; i < (MXCFB_SCREEN_WIDTH * MXCFB_SCREEN_HEIGHT); i++) +#else + for (i = 0; i < (MXCFB_SCREEN_WIDTH * MXCFB_SCREEN_HEIGHT * 3); i++) +#endif + ipu_adc_write_cmd(disp, DAT, 0xFFFF, 0, 0); + + /* Pause 80 ms */ + mdelay(80); + + /* Display ON */ + ipu_adc_write_cmd(disp, CMD, DISON, 0, 0); + /* Pause 200 ms */ + mdelay(200); + + pr_debug("initialized panel\n"); +} + +#ifdef PARTIAL_REFRESH +static irqreturn_t mxcfb_sys2_eof_irq_handler(int irq, void *dev_id) +{ + ipu_channel_params_t params; + struct fb_info *fbi = dev_id; + struct mxcfb_info *mxc_fbi = fbi->par; + uint32_t stat[2], seg_size; + uint32_t lsb, msb; + uint32_t update_height, start_line, start_addr, end_line, end_addr; + uint32_t stride_pixels = (fbi->fix.line_length * 8) / + fbi->var.bits_per_pixel; + + ipu_adc_get_snooping_status(&stat[0], &stat[1]); + + if (!stat[0] && !stat[1]) { + dev_err(fbi->device, "error no bus snooping bits set\n"); + return IRQ_HANDLED; + } + ipu_disable_irq(IPU_IRQ_ADC_SYS2_EOF); + + lsb = ffs(stat[0]); + if (lsb) { + lsb--; + } else { + lsb = ffs(stat[1]); + lsb += 32 - 1; + } + msb = fls(stat[1]); + if (msb) { + msb += 32; + } else { + msb = fls(stat[0]); + } + + seg_size = mxc_fbi->snoop_window_size / 64; + + start_addr = lsb * seg_size; /* starting address offset */ + start_line = start_addr / fbi->fix.line_length; + start_addr = start_line * fbi->fix.line_length; /* Addr aligned to line */ + start_addr += fbi->fix.smem_start; + + end_addr = msb * seg_size; /* ending address offset */ + end_line = end_addr / fbi->fix.line_length; + end_line++; + + if (end_line > fbi->var.yres) { + end_line = fbi->var.yres; + } + + update_height = end_line - start_line; + dev_dbg(fbi->device, "updating rows %d to %d, start addr = 0x%08X\n", + start_line, end_line, start_addr); + + ipu_uninit_channel(ADC_SYS1); + params.adc_sys1.disp = mxc_fbi->disp_num; + params.adc_sys1.ch_mode = WriteTemplateNonSeq; + params.adc_sys1.out_left = MXCFB_SCREEN_LEFT_OFFSET; + params.adc_sys1.out_top = start_line; + ipu_init_channel(ADC_SYS1, ¶ms); + + ipu_init_channel_buffer(ADC_SYS1, IPU_INPUT_BUFFER, + bpp_to_pixfmt(fbi->var.bits_per_pixel), + MXCFB_SCREEN_WIDTH, + update_height, + stride_pixels, + IPU_ROTATE_NONE, (dma_addr_t) start_addr, 0, + 0, 0); + ipu_enable_channel(ADC_SYS1); + ipu_select_buffer(ADC_SYS1, IPU_INPUT_BUFFER, 0); + ipu_enable_irq(IPU_IRQ_ADC_SYS1_EOF); + + return IRQ_HANDLED; +} + +static irqreturn_t mxcfb_sys1_eof_irq_handler(int irq, void *dev_id) +{ + ipu_disable_irq(IPU_IRQ_ADC_SYS1_EOF); + ipu_disable_channel(ADC_SYS1, false); + + ipu_enable_channel(ADC_SYS2); + ipu_enable_irq(IPU_IRQ_ADC_SYS2_EOF); + + return IRQ_HANDLED; +} +#endif + +/*! + * Function to initialize Asynchronous Display Controller. It also initilizes + * the ADC System 1 channel. Configure ADC display 0 parallel interface for + * the panel. + * + * @param fbi framebuffer information pointer + */ +static void mxcfb_init_panel(struct fb_info *fbi) +{ + int msb; + int panel_stride; + ipu_channel_params_t params; + struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par; + +#ifdef CONFIG_FB_MXC_ASYNC_PANEL_IFC_16_BIT + uint32_t pix_fmt = IPU_PIX_FMT_RGB565; + ipu_adc_sig_cfg_t sig = { 0, 0, 0, 0, 0, 0, 0, 0, + IPU_ADC_BURST_WCS, + IPU_ADC_IFC_MODE_SYS80_TYPE2, + 16, 0, 0, IPU_ADC_SER_NO_RW + }; + mxc_fbi->disp_num = DISP0; +#elif defined(CONFIG_FB_MXC_ASYNC_PANEL_IFC_8_BIT) + uint32_t pix_fmt = IPU_PIX_FMT_RGB666; + ipu_adc_sig_cfg_t sig = { 0, 0, 0, 0, 0, 0, 0, 0, + IPU_ADC_BURST_WCS, + IPU_ADC_IFC_MODE_SYS80_TYPE2, + 8, 0, 0, IPU_ADC_SER_NO_RW + }; + mxc_fbi->disp_num = DISP0; +#else + uint32_t pix_fmt = IPU_PIX_FMT_RGB565; + ipu_adc_sig_cfg_t sig = { 0, 1, 0, 0, 0, 0, 0, 0, + IPU_ADC_BURST_SERIAL, + IPU_ADC_IFC_MODE_5WIRE_SERIAL_CLK, + 16, 0, 0, IPU_ADC_SER_NO_RW + }; + fbi->disp_num = DISP1; +#endif + +#ifdef PARTIAL_REFRESH + if (ipu_request_irq(IPU_IRQ_ADC_SYS2_EOF, mxcfb_sys2_eof_irq_handler, 0, + MXCFB_NAME, fbi) != 0) { + dev_err(fbi->device, "Error registering SYS2 irq handler.\n"); + return; + } + + if (ipu_request_irq(IPU_IRQ_ADC_SYS1_EOF, mxcfb_sys1_eof_irq_handler, 0, + MXCFB_NAME, fbi) != 0) { + dev_err(fbi->device, "Error registering SYS1 irq handler.\n"); + return; + } + ipu_disable_irq(IPU_IRQ_ADC_SYS1_EOF); + ipu_disable_irq(IPU_IRQ_ADC_SYS2_EOF); +#endif + /* Init DI interface */ + msb = fls(MXCFB_SCREEN_WIDTH); + if (!(MXCFB_SCREEN_WIDTH & ((1UL << msb) - 1))) + msb--; /* Already aligned to power 2 */ + panel_stride = 1UL << msb; + ipu_adc_init_panel(mxc_fbi->disp_num, + MXCFB_SCREEN_WIDTH + MXCFB_SCREEN_LEFT_OFFSET, + MXCFB_SCREEN_HEIGHT, + pix_fmt, panel_stride, sig, XY, 0, VsyncInternal); + + ipu_adc_init_ifc_timing(mxc_fbi->disp_num, true, + 190, 17, 104, 190, 5000000); + ipu_adc_init_ifc_timing(mxc_fbi->disp_num, false, 123, 17, 68, 0, 0); + + /* Needed to turn on ADC clock for panel init */ + memset(¶ms, 0, sizeof(params)); + params.adc_sys1.disp = mxc_fbi->disp_num; + params.adc_sys1.ch_mode = WriteTemplateNonSeq; + params.adc_sys1.out_left = MXCFB_SCREEN_LEFT_OFFSET; + params.adc_sys1.out_top = MXCFB_SCREEN_TOP_OFFSET; + ipu_init_channel(ADC_SYS1, ¶ms); + + _init_panel(mxc_fbi->disp_num); + init_channel_template(mxc_fbi->disp_num); +} + +int mxcfb_set_refresh_mode(struct fb_info *fbi, int mode, + struct mxcfb_rect *update_region) +{ + unsigned long start_addr; + int ret_mode; + uint32_t dummy; + ipu_channel_params_t params; + struct mxcfb_rect rect; + struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par; + uint32_t stride_pixels = (fbi->fix.line_length * 8) / + fbi->var.bits_per_pixel; + uint32_t memsize = fbi->fix.smem_len; + + if (mxc_fbi->cur_update_mode == mode) + return mode; + + ret_mode = mxc_fbi->cur_update_mode; + + ipu_disable_irq(IPU_IRQ_ADC_SYS1_EOF); + ipu_adc_set_update_mode(ADC_SYS1, IPU_ADC_REFRESH_NONE, 0, 0, 0); +#ifdef PARTIAL_REFRESH + ipu_disable_irq(IPU_IRQ_ADC_SYS2_EOF); + ipu_adc_set_update_mode(ADC_SYS2, IPU_ADC_REFRESH_NONE, 0, 0, 0); +#endif + + ipu_disable_channel(ADC_SYS1, true); + ipu_clear_irq(IPU_IRQ_ADC_SYS1_EOF); +#ifdef PARTIAL_REFRESH + ipu_disable_channel(ADC_SYS2, true); + ipu_clear_irq(IPU_IRQ_ADC_SYS2_EOF); +#endif + ipu_adc_get_snooping_status(&dummy, &dummy); + + mxc_fbi->cur_update_mode = mode; + + switch (mode) { + case MXCFB_REFRESH_OFF: + if (ipu_adc_set_update_mode(ADC_SYS1, IPU_ADC_REFRESH_NONE, + 0, 0, 0) < 0) + dev_err(fbi->device, "Error enabling auto refesh.\n"); + if (ipu_adc_set_update_mode(ADC_SYS2, IPU_ADC_REFRESH_NONE, + 0, 0, 0) < 0) + dev_err(fbi->device, "Error enabling auto refesh.\n"); +#if 0 + ipu_init_channel_buffer(ADC_SYS2, IPU_INPUT_BUFFER, + bpp_to_pixfmt(fbi->var.bits_per_pixel), + 1, 1, 4, + IPU_ROTATE_NONE, + fbi->fix.smem_start, + fbi->fix.smem_start, 0, 0); + ipu_enable_channel(ADC_SYS2); + ipu_select_buffer(ADC_SYS2, IPU_INPUT_BUFFER, 0); + ipu_select_buffer(ADC_SYS2, IPU_INPUT_BUFFER, 1); + msleep(10); +#endif + ipu_uninit_channel(ADC_SYS1); +#ifdef PARTIAL_REFRESH + ipu_uninit_channel(ADC_SYS2); +#endif + break; + case MXCFB_REFRESH_PARTIAL: +#ifdef PARTIAL_REFRESH + ipu_adc_get_snooping_status(&dummy, &dummy); + + params.adc_sys2.disp = DISP0; + params.adc_sys2.ch_mode = WriteTemplateNonSeq; + params.adc_sys2.out_left = 0; + params.adc_sys2.out_top = 0; + ipu_init_channel(ADC_SYS2, ¶ms); + + if (ipu_adc_set_update_mode(ADC_SYS1, IPU_ADC_REFRESH_NONE, + 0, 0, 0) < 0) { + dev_err(fbi->device, "Error enabling auto refesh.\n"); + } + if (ipu_adc_set_update_mode + (ADC_SYS2, IPU_ADC_AUTO_REFRESH_SNOOP, 30, + fbi->fix.smem_start, &memsize) < 0) { + dev_err(fbi->device, "Error enabling auto refesh.\n"); + } + mxc_fbi->snoop_window_size = memsize; + + ipu_init_channel_buffer(ADC_SYS2, IPU_INPUT_BUFFER, + bpp_to_pixfmt(fbi->var.bits_per_pixel), + 1, 1, 4, + IPU_ROTATE_NONE, + fbi->fix.smem_start, 0, 0, 0); + + params.adc_sys1.disp = mxc_fbi->disp_num; + params.adc_sys1.ch_mode = WriteTemplateNonSeq; + params.adc_sys1.out_left = MXCFB_SCREEN_LEFT_OFFSET; + params.adc_sys1.out_top = MXCFB_SCREEN_TOP_OFFSET; + ipu_init_channel(ADC_SYS1, ¶ms); + + ipu_init_channel_buffer(ADC_SYS1, IPU_INPUT_BUFFER, + bpp_to_pixfmt(fbi->var.bits_per_pixel), + MXCFB_SCREEN_WIDTH, MXCFB_SCREEN_HEIGHT, + stride_pixels, IPU_ROTATE_NONE, + fbi->fix.smem_start, 0, 0, 0); + ipu_enable_channel(ADC_SYS1); + ipu_select_buffer(ADC_SYS1, IPU_INPUT_BUFFER, 0); + ipu_enable_irq(IPU_IRQ_ADC_SYS1_EOF); + break; +#endif + case MXCFB_REFRESH_AUTO: + if (update_region == NULL) { + update_region = ▭ + rect.top = 0; + rect.left = 0; + rect.height = MXCFB_SCREEN_HEIGHT; + rect.width = MXCFB_SCREEN_WIDTH; + } + params.adc_sys1.disp = mxc_fbi->disp_num; + params.adc_sys1.ch_mode = WriteTemplateNonSeq; + params.adc_sys1.out_left = MXCFB_SCREEN_LEFT_OFFSET + + update_region->left; + params.adc_sys1.out_top = MXCFB_SCREEN_TOP_OFFSET + + update_region->top; + ipu_init_channel(ADC_SYS1, ¶ms); + + /* Address aligned to line */ + start_addr = update_region->top * fbi->fix.line_length; + start_addr += fbi->fix.smem_start; + start_addr += update_region->left * fbi->var.bits_per_pixel / 8; + + ipu_init_channel_buffer(ADC_SYS1, IPU_INPUT_BUFFER, + bpp_to_pixfmt(fbi->var.bits_per_pixel), + update_region->width, + update_region->height, stride_pixels, + IPU_ROTATE_NONE, start_addr, 0, 0, 0); + ipu_enable_channel(ADC_SYS1); + ipu_select_buffer(ADC_SYS1, IPU_INPUT_BUFFER, 0); + + if (ipu_adc_set_update_mode + (ADC_SYS1, IPU_ADC_AUTO_REFRESH_SNOOP, 30, + fbi->fix.smem_start, &memsize) < 0) + dev_err(fbi->device, "Error enabling auto refesh.\n"); + + mxc_fbi->snoop_window_size = memsize; + + break; + } + return ret_mode; +} + +/* + * Open the main framebuffer. + * + * @param fbi framebuffer information pointer + * + * @param user Set if opened by user or clear if opened by kernel + */ +static int mxcfb_open(struct fb_info *fbi, int user) +{ + int retval = 0; + struct mxcfb_info *mxc_fbi = fbi->par; + + retval = wait_event_interruptible(mxcfb_drv_data.suspend_wq, + (mxcfb_drv_data.suspended == false)); + if (retval < 0) + return retval; + + mxc_fbi->open_count++; + + retval = mxcfb_blank(FB_BLANK_UNBLANK, fbi); + return retval; +} + +/* + * Close the main framebuffer. + * + * @param fbi framebuffer information pointer + * + * @param user Set if opened by user or clear if opened by kernel + */ +static int mxcfb_release(struct fb_info *fbi, int user) +{ + int retval = 0; + struct mxcfb_info *mxc_fbi = fbi->par; + + retval = wait_event_interruptible(mxcfb_drv_data.suspend_wq, + (mxcfb_drv_data.suspended == false)); + if (retval < 0) + return retval; + + --mxc_fbi->open_count; + if (mxc_fbi->open_count == 0) { + retval = mxcfb_blank(FB_BLANK_POWERDOWN, fbi); + } + return retval; +} + +/* + * Set fixed framebuffer parameters based on variable settings. + * + * @param info framebuffer information pointer + */ +static int mxcfb_set_fix(struct fb_info *info) +{ + struct fb_fix_screeninfo *fix = &info->fix; + struct fb_var_screeninfo *var = &info->var; + struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)info->par; + + /* Set framebuffer id to IPU display number. */ + strcpy(fix->id, "DISP0 FB"); + fix->id[4] = '0' + mxc_fbi->disp_num; + + /* Init settings based on the panel size */ + fix->line_length = MXCFB_SCREEN_WIDTH * var->bits_per_pixel / 8; + + fix->type = FB_TYPE_PACKED_PIXELS; + fix->accel = FB_ACCEL_NONE; + fix->visual = FB_VISUAL_TRUECOLOR; + fix->xpanstep = 0; + fix->ypanstep = 0; + + return 0; +} + +/* + * Set framebuffer parameters and change the operating mode. + * + * @param info framebuffer information pointer + */ +static int mxcfb_set_par(struct fb_info *fbi) +{ + int retval = 0; + int mode; + + retval = wait_event_interruptible(mxcfb_drv_data.suspend_wq, + (mxcfb_drv_data.suspended == false)); + if (retval < 0) + return retval; + + mode = mxcfb_set_refresh_mode(fbi, MXCFB_REFRESH_OFF, NULL); + + mxcfb_set_fix(fbi); + + if (mode != MXCFB_REFRESH_OFF) { +#ifdef PARTIAL_REFRESH + mxcfb_set_refresh_mode(fbi, MXCFB_REFRESH_PARTIAL, NULL); +#else + mxcfb_set_refresh_mode(fbi, MXCFB_REFRESH_AUTO, NULL); +#endif + } + return 0; +} + +/* + * Check framebuffer variable parameters and adjust to valid values. + * + * @param var framebuffer variable parameters + * + * @param info framebuffer information pointer + */ +static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi) +{ + if (var->xres > MXCFB_SCREEN_WIDTH) + var->xres = MXCFB_SCREEN_WIDTH; + if (var->yres > MXCFB_SCREEN_HEIGHT) + var->yres = MXCFB_SCREEN_HEIGHT; + if (var->xres_virtual < var->xres) + var->xres_virtual = var->xres; + if (var->yres_virtual < var->yres) + var->yres_virtual = var->yres; + + if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) && + (var->bits_per_pixel != 16)) { + var->bits_per_pixel = default_bpp; + } + + switch (var->bits_per_pixel) { + case 16: + var->red.length = 5; + var->red.offset = 11; + var->red.msb_right = 0; + + var->green.length = 6; + var->green.offset = 5; + var->green.msb_right = 0; + + var->blue.length = 5; + var->blue.offset = 0; + var->blue.msb_right = 0; + + var->transp.length = 0; + var->transp.offset = 0; + var->transp.msb_right = 0; + break; + case 24: + var->red.length = 8; + var->red.offset = 16; + var->red.msb_right = 0; + + var->green.length = 8; + var->green.offset = 8; + var->green.msb_right = 0; + + var->blue.length = 8; + var->blue.offset = 0; + var->blue.msb_right = 0; + + var->transp.length = 0; + var->transp.offset = 0; + var->transp.msb_right = 0; + break; + case 32: + var->red.length = 8; + var->red.offset = 16; + var->red.msb_right = 0; + + var->green.length = 8; + var->green.offset = 8; + var->green.msb_right = 0; + + var->blue.length = 8; + var->blue.offset = 0; + var->blue.msb_right = 0; + + var->transp.length = 8; + var->transp.offset = 24; + var->transp.msb_right = 0; + break; + } + + var->height = -1; + var->width = -1; + var->grayscale = 0; + var->nonstd = 0; + + var->pixclock = -1; + var->left_margin = -1; + var->right_margin = -1; + var->upper_margin = -1; + var->lower_margin = -1; + var->hsync_len = -1; + var->vsync_len = -1; + + var->vmode = FB_VMODE_NONINTERLACED; + var->sync = 0; + + return 0; +} + +static inline u_int _chan_to_field(u_int chan, struct fb_bitfield *bf) +{ + chan &= 0xffff; + chan >>= 16 - bf->length; + return chan << bf->offset; +} + +static int +mxcfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, + u_int trans, struct fb_info *fbi) +{ + unsigned int val; + int ret = 1; + + /* + * If greyscale is true, then we convert the RGB value + * to greyscale no matter what visual we are using. + */ + if (fbi->var.grayscale) + red = green = blue = (19595 * red + 38470 * green + + 7471 * blue) >> 16; + switch (fbi->fix.visual) { + case FB_VISUAL_TRUECOLOR: + /* + * 16-bit True Colour. We encode the RGB value + * according to the RGB bitfield information. + */ + if (regno < 16) { + u32 *pal = fbi->pseudo_palette; + + val = _chan_to_field(red, &fbi->var.red); + val |= _chan_to_field(green, &fbi->var.green); + val |= _chan_to_field(blue, &fbi->var.blue); + + pal[regno] = val; + ret = 0; + } + break; + + case FB_VISUAL_STATIC_PSEUDOCOLOR: + case FB_VISUAL_PSEUDOCOLOR: + break; + } + + return ret; +} + +/* + * mxcfb_blank(): + * Blank the display. + */ +static int mxcfb_blank(int blank, struct fb_info *fbi) +{ + int retval = 0; + struct mxcfb_info *mxc_fbi = fbi->par; + + dev_dbg(fbi->device, "blank = %d\n", blank); + + retval = wait_event_interruptible(mxcfb_drv_data.suspend_wq, + (mxcfb_drv_data.suspended == false)); + if (retval < 0) + return retval; + + mxc_fbi->blank = blank; + + switch (blank) { + case FB_BLANK_POWERDOWN: + case FB_BLANK_VSYNC_SUSPEND: + case FB_BLANK_HSYNC_SUSPEND: + case FB_BLANK_NORMAL: + mxcfb_set_refresh_mode(fbi, MXCFB_REFRESH_OFF, NULL); + break; + case FB_BLANK_UNBLANK: + mxcfb_set_refresh_mode(fbi, MXCFB_REFRESH_DEFAULT, NULL); + break; + } + return 0; +} + +/*! + * This structure contains the pointers to the control functions that are + * invoked by the core framebuffer driver to perform operations like + * blitting, rectangle filling, copy regions and cursor definition. + */ +static struct fb_ops mxcfb_ops = { + .owner = THIS_MODULE, + .fb_open = mxcfb_open, + .fb_release = mxcfb_release, + .fb_set_par = mxcfb_set_par, + .fb_check_var = mxcfb_check_var, + .fb_setcolreg = mxcfb_setcolreg, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_blank = mxcfb_blank, +}; + +/*! + * Allocates the DRAM memory for the frame buffer. This buffer is remapped + * into a non-cached, non-buffered, memory region to allow palette and pixel + * writes to occur without flushing the cache. Once this area is remapped, + * all virtual memory access to the video memory should occur at the new region. + * + * @param fbi framebuffer information pointer + * + * @return Error code indicating success or failure + */ +static int mxcfb_map_video_memory(struct fb_info *fbi) +{ + u32 msb; + u32 offset; + struct mxcfb_info *mxcfbi = fbi->par; + + fbi->fix.smem_len = fbi->var.xres_virtual * fbi->var.yres_virtual * 4; + + /* Set size to power of 2. */ + msb = fls(fbi->fix.smem_len); + if (!(fbi->fix.smem_len & ((1UL << msb) - 1))) + msb--; /* Already aligned to power 2 */ + if (msb < 11) + msb = 11; + mxcfbi->alloc_size = (1UL << msb) * 2; + + mxcfbi->alloc_start_vaddr = dma_alloc_coherent(fbi->device, + mxcfbi->alloc_size, + &mxcfbi-> + alloc_start_paddr, + GFP_KERNEL | GFP_DMA); + + if (mxcfbi->alloc_start_vaddr == 0) { + dev_err(fbi->device, "Unable to allocate framebuffer memory\n"); + return -ENOMEM; + } + dev_dbg(fbi->device, "allocated fb memory @ paddr=0x%08X, size=%d.\n", + (uint32_t) mxcfbi->alloc_start_paddr, mxcfbi->alloc_size); + + offset = + ((mxcfbi->alloc_size / 2) - 1) & ~((mxcfbi->alloc_size / 2) - 1); + fbi->fix.smem_start = mxcfbi->alloc_start_paddr + offset; + dev_dbg(fbi->device, "aligned fb start @ paddr=0x%08lX, size=%u.\n", + fbi->fix.smem_start, fbi->fix.smem_len); + + fbi->screen_base = mxcfbi->alloc_start_vaddr + offset; + + /* Clear the screen */ + memset(fbi->screen_base, 0, fbi->fix.smem_len); + return 0; +} + +/*! + * De-allocates the DRAM memory for the frame buffer. + * + * @param fbi framebuffer information pointer + * + * @return Error code indicating success or failure + */ +static int mxcfb_unmap_video_memory(struct fb_info *fbi) +{ + struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par; + + dma_free_coherent(fbi->device, mxc_fbi->alloc_size, + mxc_fbi->alloc_start_vaddr, + mxc_fbi->alloc_start_paddr); + return 0; +} + +/*! + * Initializes the framebuffer information pointer. After allocating + * sufficient memory for the framebuffer structure, the fields are + * filled with custom information passed in from the configurable + * structures. This includes information such as bits per pixel, + * color maps, screen width/height and RGBA offsets. + * + * @return Framebuffer structure initialized with our information + */ +static struct fb_info *mxcfb_init_fbinfo(struct device *dev, struct fb_ops *ops) +{ + struct fb_info *fbi; + struct mxcfb_info *mxcfbi; + + /* + * Allocate sufficient memory for the fb structure + */ + fbi = framebuffer_alloc(sizeof(struct mxcfb_info), dev); + if (!fbi) + return NULL; + + mxcfbi = (struct mxcfb_info *)fbi->par; + + /* + * Fill in fb_info structure information + */ + fbi->var.xres = fbi->var.xres_virtual = MXCFB_SCREEN_WIDTH; + fbi->var.yres = fbi->var.yres_virtual = MXCFB_SCREEN_HEIGHT; + fbi->var.activate = FB_ACTIVATE_NOW; + mxcfb_check_var(&fbi->var, fbi); + + mxcfb_set_fix(fbi); + + fbi->fbops = ops; + fbi->flags = FBINFO_FLAG_DEFAULT; + fbi->pseudo_palette = mxcfbi->pseudo_palette; + + /* + * Allocate colormap + */ + fb_alloc_cmap(&fbi->cmap, 16, 0); + + return fbi; +} + +/*! + * Probe routine for the framebuffer driver. It is called during the + * driver binding process. The following functions are performed in + * this routine: Framebuffer initialization, Memory allocation and + * mapping, Framebuffer registration, IPU initialization. + * + * @return Appropriate error code to the kernel common code + */ +static int mxcfb_probe(struct platform_device *pdev) +{ + struct fb_info *fbi; + struct mxcfb_info *mxc_fbi; + int ret; + + platform_set_drvdata(pdev, &mxcfb_drv_data); + + /* + * Initialize FB structures + */ + fbi = mxcfb_init_fbinfo(&pdev->dev, &mxcfb_ops); + if (!fbi) { + ret = -ENOMEM; + goto err0; + } + mxcfb_drv_data.fbi = fbi; + mxc_fbi = fbi->par; + + mxcfb_drv_data.suspended = false; + init_waitqueue_head(&mxcfb_drv_data.suspend_wq); + + /* + * Allocate memory + */ + ret = mxcfb_map_video_memory(fbi); + if (ret < 0) { + goto err1; + } + + mxcfb_init_panel(fbi); + + /* + * Register framebuffer + */ + ret = register_framebuffer(fbi); + if (ret < 0) { + goto err2; + } + + dev_info(&pdev->dev, "%s registered\n", MXCFB_NAME); + + return 0; + + err2: + mxcfb_unmap_video_memory(fbi); + err1: + if (&fbi->cmap) + fb_dealloc_cmap(&fbi->cmap); + framebuffer_release(fbi); + err0: + return ret; +} + +#ifdef CONFIG_PM +/*! + * Power management hooks. Note that we won't be called from IRQ context, + * unlike the blank functions above, so we may sleep. + */ + +/*! + * Suspends the framebuffer and blanks the screen. Power management support + * + * @param pdev pointer to device structure. + * @param state state of the device. + * + * @return success + */ +static int mxcfb_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct mxcfb_data *drv_data = platform_get_drvdata(pdev); + struct fb_info *fbi = drv_data->fbi; + struct mxcfb_info *mxc_fbi = fbi->par; + + drv_data->suspended = true; + + if (mxc_fbi->blank == FB_BLANK_UNBLANK) + mxcfb_set_refresh_mode(fbi, MXCFB_REFRESH_OFF, NULL); + /* Display OFF */ + ipu_adc_write_cmd(mxc_fbi->disp_num, CMD, DISOFF, 0, 0); + + return 0; +} + +/*! + * Resumes the framebuffer and unblanks the screen. Power management support + * + * @param pdev pointer to device structure. + * + * @return success + */ +static int mxcfb_resume(struct platform_device *pdev) +{ + struct mxcfb_data *drv_data = platform_get_drvdata(pdev); + struct fb_info *fbi = drv_data->fbi; + struct mxcfb_info *mxc_fbi = fbi->par; + + /* Display ON */ + ipu_adc_write_cmd(mxc_fbi->disp_num, CMD, DISON, 0, 0); + drv_data->suspended = false; + + if (mxc_fbi->blank == FB_BLANK_UNBLANK) + mxcfb_set_refresh_mode(fbi, MXCFB_REFRESH_DEFAULT, NULL); + wake_up_interruptible(&drv_data->suspend_wq); + + return 0; +} +#else +#define mxcfb_suspend NULL +#define mxcfb_resume NULL +#endif + +/*! + * This structure contains pointers to the power management callback functions. + */ +static struct platform_driver mxcfb_driver = { + .driver = { + .name = MXCFB_NAME, + }, + .probe = mxcfb_probe, + .suspend = mxcfb_suspend, + .resume = mxcfb_resume, +}; + +/*! + * Device definition for the Framebuffer + */ +static struct platform_device mxcfb_device = { + .name = MXCFB_NAME, + .id = 0, + .dev = { + .coherent_dma_mask = 0xFFFFFFFF, + } +}; + +/*! + * Main entry function for the framebuffer. The function registers the power + * management callback functions with the kernel and also registers the MXCFB + * callback functions with the core Linux framebuffer driver \b fbmem.c + * + * @return Error code indicating success or failure + */ +static int mxcfb_init(void) +{ + int ret = 0; + + ret = platform_driver_register(&mxcfb_driver); + if (ret == 0) { + ret = platform_device_register(&mxcfb_device); + if (ret != 0) { + platform_driver_unregister(&mxcfb_driver); + } + } + return ret; +} + +static void mxcfb_exit(void) +{ + struct fb_info *fbi = dev_get_drvdata(&mxcfb_device.dev); + + if (fbi) { + mxcfb_unmap_video_memory(fbi); + + if (&fbi->cmap) + fb_dealloc_cmap(&fbi->cmap); + + unregister_framebuffer(fbi); + framebuffer_release(fbi); + } + + platform_device_unregister(&mxcfb_device); + platform_driver_unregister(&mxcfb_driver); +} + +module_init(mxcfb_init); +module_exit(mxcfb_exit); + +EXPORT_SYMBOL(mxcfb_set_refresh_mode); + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("MXC Epson framebuffer driver"); +MODULE_SUPPORTED_DEVICE("fb"); |