| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| York Sun | 5681 | 60.05% | 3 | 4.84% |
| Timur Tabi | 3081 | 32.57% | 31 | 50.00% |
| Anatolij Gustschin | 494 | 5.22% | 7 | 11.29% |
| Krzysztof Helt | 55 | 0.58% | 1 | 1.61% |
| Jason Jin | 47 | 0.50% | 1 | 1.61% |
| Dongsheng Wang | 23 | 0.24% | 1 | 1.61% |
| Kees Cook | 18 | 0.19% | 1 | 1.61% |
| Grant C. Likely | 14 | 0.15% | 4 | 6.45% |
| Julia Lawall | 14 | 0.15% | 1 | 1.61% |
| Rob Herring | 9 | 0.10% | 2 | 3.23% |
| Wolfram Sang | 9 | 0.10% | 1 | 1.61% |
| Arvind Yadav | 2 | 0.02% | 1 | 1.61% |
| Takashi Iwai | 2 | 0.02% | 1 | 1.61% |
| Thomas Gleixner | 2 | 0.02% | 1 | 1.61% |
| Colin Ian King | 2 | 0.02% | 1 | 1.61% |
| Jingoo Han | 2 | 0.02% | 1 | 1.61% |
| Jeff Mahoney | 2 | 0.02% | 1 | 1.61% |
| Lucas De Marchi | 1 | 0.01% | 1 | 1.61% |
| Damien Cassou | 1 | 0.01% | 1 | 1.61% |
| Anton Vorontsov | 1 | 0.01% | 1 | 1.61% |
| Total | 9460 | 62 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved. * * Freescale DIU Frame Buffer device driver * * Authors: Hongjun Chen <hong-jun.chen@freescale.com> * Paul Widmer <paul.widmer@freescale.com> * Srikanth Srinivasan <srikanth.srinivasan@freescale.com> * York Sun <yorksun@freescale.com> * * Based on imxfb.c Copyright (C) 2004 S.Hauer, Pengutronix */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/string.h> #include <linux/slab.h> #include <linux/fb.h> #include <linux/init.h> #include <linux/dma-mapping.h> #include <linux/platform_device.h> #include <linux/interrupt.h> #include <linux/clk.h> #include <linux/uaccess.h> #include <linux/vmalloc.h> #include <linux/spinlock.h> #include <linux/of_address.h> #include <linux/of_irq.h> #include <sysdev/fsl_soc.h> #include <linux/fsl-diu-fb.h> #include "edid.h" #define NUM_AOIS 5 /* 1 for plane 0, 2 for planes 1 & 2 each */ /* HW cursor parameters */ #define MAX_CURS 32 /* INT_STATUS/INT_MASK field descriptions */ #define INT_VSYNC 0x01 /* Vsync interrupt */ #define INT_VSYNC_WB 0x02 /* Vsync interrupt for write back operation */ #define INT_UNDRUN 0x04 /* Under run exception interrupt */ #define INT_PARERR 0x08 /* Display parameters error interrupt */ #define INT_LS_BF_VS 0x10 /* Lines before vsync. interrupt */ /* * List of supported video modes * * The first entry is the default video mode. The remain entries are in * order if increasing resolution and frequency. The 320x240-60 mode is * the initial AOI for the second and third planes. */ static struct fb_videomode fsl_diu_mode_db[] = { { .refresh = 60, .xres = 1024, .yres = 768, .pixclock = 15385, .left_margin = 160, .right_margin = 24, .upper_margin = 29, .lower_margin = 3, .hsync_len = 136, .vsync_len = 6, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 60, .xres = 320, .yres = 240, .pixclock = 79440, .left_margin = 16, .right_margin = 16, .upper_margin = 16, .lower_margin = 5, .hsync_len = 48, .vsync_len = 1, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 60, .xres = 640, .yres = 480, .pixclock = 39722, .left_margin = 48, .right_margin = 16, .upper_margin = 33, .lower_margin = 10, .hsync_len = 96, .vsync_len = 2, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 72, .xres = 640, .yres = 480, .pixclock = 32052, .left_margin = 128, .right_margin = 24, .upper_margin = 28, .lower_margin = 9, .hsync_len = 40, .vsync_len = 3, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 75, .xres = 640, .yres = 480, .pixclock = 31747, .left_margin = 120, .right_margin = 16, .upper_margin = 16, .lower_margin = 1, .hsync_len = 64, .vsync_len = 3, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 90, .xres = 640, .yres = 480, .pixclock = 25057, .left_margin = 120, .right_margin = 32, .upper_margin = 14, .lower_margin = 25, .hsync_len = 40, .vsync_len = 14, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 100, .xres = 640, .yres = 480, .pixclock = 22272, .left_margin = 48, .right_margin = 32, .upper_margin = 17, .lower_margin = 22, .hsync_len = 128, .vsync_len = 12, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 60, .xres = 800, .yres = 480, .pixclock = 33805, .left_margin = 96, .right_margin = 24, .upper_margin = 10, .lower_margin = 3, .hsync_len = 72, .vsync_len = 7, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 60, .xres = 800, .yres = 600, .pixclock = 25000, .left_margin = 88, .right_margin = 40, .upper_margin = 23, .lower_margin = 1, .hsync_len = 128, .vsync_len = 4, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 60, .xres = 854, .yres = 480, .pixclock = 31518, .left_margin = 104, .right_margin = 16, .upper_margin = 13, .lower_margin = 1, .hsync_len = 88, .vsync_len = 3, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 70, .xres = 1024, .yres = 768, .pixclock = 16886, .left_margin = 3, .right_margin = 3, .upper_margin = 2, .lower_margin = 2, .hsync_len = 40, .vsync_len = 18, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 75, .xres = 1024, .yres = 768, .pixclock = 15009, .left_margin = 3, .right_margin = 3, .upper_margin = 2, .lower_margin = 2, .hsync_len = 80, .vsync_len = 32, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 60, .xres = 1280, .yres = 480, .pixclock = 18939, .left_margin = 353, .right_margin = 47, .upper_margin = 39, .lower_margin = 4, .hsync_len = 8, .vsync_len = 2, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 60, .xres = 1280, .yres = 720, .pixclock = 13426, .left_margin = 192, .right_margin = 64, .upper_margin = 22, .lower_margin = 1, .hsync_len = 136, .vsync_len = 3, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 60, .xres = 1280, .yres = 1024, .pixclock = 9375, .left_margin = 38, .right_margin = 128, .upper_margin = 2, .lower_margin = 7, .hsync_len = 216, .vsync_len = 37, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 70, .xres = 1280, .yres = 1024, .pixclock = 9380, .left_margin = 6, .right_margin = 6, .upper_margin = 4, .lower_margin = 4, .hsync_len = 60, .vsync_len = 94, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 75, .xres = 1280, .yres = 1024, .pixclock = 9380, .left_margin = 6, .right_margin = 6, .upper_margin = 4, .lower_margin = 4, .hsync_len = 60, .vsync_len = 15, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, { .refresh = 60, .xres = 1920, .yres = 1080, .pixclock = 5787, .left_margin = 328, .right_margin = 120, .upper_margin = 34, .lower_margin = 1, .hsync_len = 208, .vsync_len = 3, .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED }, }; static char *fb_mode; static unsigned long default_bpp = 32; static enum fsl_diu_monitor_port monitor_port; static char *monitor_string; #if defined(CONFIG_NOT_COHERENT_CACHE) static u8 *coherence_data; static size_t coherence_data_size; static unsigned int d_cache_line_size; #endif static DEFINE_SPINLOCK(diu_lock); enum mfb_index { PLANE0 = 0, /* Plane 0, only one AOI that fills the screen */ PLANE1_AOI0, /* Plane 1, first AOI */ PLANE1_AOI1, /* Plane 1, second AOI */ PLANE2_AOI0, /* Plane 2, first AOI */ PLANE2_AOI1, /* Plane 2, second AOI */ }; struct mfb_info { enum mfb_index index; char *id; int registered; unsigned long pseudo_palette[16]; struct diu_ad *ad; unsigned char g_alpha; unsigned int count; int x_aoi_d; /* aoi display x offset to physical screen */ int y_aoi_d; /* aoi display y offset to physical screen */ struct fsl_diu_data *parent; }; /** * struct fsl_diu_data - per-DIU data structure * @dma_addr: DMA address of this structure * @fsl_diu_info: fb_info objects, one per AOI * @dev_attr: sysfs structure * @irq: IRQ * @monitor_port: the monitor port this DIU is connected to * @diu_reg: pointer to the DIU hardware registers * @reg_lock: spinlock for register access * @dummy_aoi: video buffer for the 4x4 32-bit dummy AOI * dummy_ad: DIU Area Descriptor for the dummy AOI * @ad[]: Area Descriptors for each real AOI * @gamma: gamma color table * @cursor: hardware cursor data * @blank_cursor: blank cursor for hiding cursor * @next_cursor: scratch space to build load cursor * @edid_data: EDID information buffer * @has_edid: whether or not the EDID buffer is valid * * This data structure must be allocated with 32-byte alignment, so that the * internal fields can be aligned properly. */ struct fsl_diu_data { dma_addr_t dma_addr; struct fb_info fsl_diu_info[NUM_AOIS]; struct mfb_info mfb[NUM_AOIS]; struct device_attribute dev_attr; unsigned int irq; enum fsl_diu_monitor_port monitor_port; struct diu __iomem *diu_reg; spinlock_t reg_lock; u8 dummy_aoi[4 * 4 * 4]; struct diu_ad dummy_ad __aligned(8); struct diu_ad ad[NUM_AOIS] __aligned(8); u8 gamma[256 * 3] __aligned(32); /* It's easier to parse the cursor data as little-endian */ __le16 cursor[MAX_CURS * MAX_CURS] __aligned(32); /* Blank cursor data -- used to hide the cursor */ __le16 blank_cursor[MAX_CURS * MAX_CURS] __aligned(32); /* Scratch cursor data -- used to build new cursor */ __le16 next_cursor[MAX_CURS * MAX_CURS] __aligned(32); uint8_t edid_data[EDID_LENGTH]; bool has_edid; } __aligned(32); /* Determine the DMA address of a member of the fsl_diu_data structure */ #define DMA_ADDR(p, f) ((p)->dma_addr + offsetof(struct fsl_diu_data, f)) static const struct mfb_info mfb_template[] = { { .index = PLANE0, .id = "Panel0", .registered = 0, .count = 0, .x_aoi_d = 0, .y_aoi_d = 0, }, { .index = PLANE1_AOI0, .id = "Panel1 AOI0", .registered = 0, .g_alpha = 0xff, .count = 0, .x_aoi_d = 0, .y_aoi_d = 0, }, { .index = PLANE1_AOI1, .id = "Panel1 AOI1", .registered = 0, .g_alpha = 0xff, .count = 0, .x_aoi_d = 0, .y_aoi_d = 480, }, { .index = PLANE2_AOI0, .id = "Panel2 AOI0", .registered = 0, .g_alpha = 0xff, .count = 0, .x_aoi_d = 640, .y_aoi_d = 0, }, { .index = PLANE2_AOI1, .id = "Panel2 AOI1", .registered = 0, .g_alpha = 0xff, .count = 0, .x_aoi_d = 640, .y_aoi_d = 480, }, }; #ifdef DEBUG static void __attribute__ ((unused)) fsl_diu_dump(struct diu __iomem *hw) { mb(); pr_debug("DIU: desc=%08x,%08x,%08x, gamma=%08x palette=%08x " "cursor=%08x curs_pos=%08x diu_mode=%08x bgnd=%08x " "disp_size=%08x hsyn_para=%08x vsyn_para=%08x syn_pol=%08x " "thresholds=%08x int_mask=%08x plut=%08x\n", hw->desc[0], hw->desc[1], hw->desc[2], hw->gamma, hw->palette, hw->cursor, hw->curs_pos, hw->diu_mode, hw->bgnd, hw->disp_size, hw->hsyn_para, hw->vsyn_para, hw->syn_pol, hw->thresholds, hw->int_mask, hw->plut); rmb(); } #endif /** * fsl_diu_name_to_port - convert a port name to a monitor port enum * * Takes the name of a monitor port ("dvi", "lvds", or "dlvds") and returns * the enum fsl_diu_monitor_port that corresponds to that string. * * For compatibility with older versions, a number ("0", "1", or "2") is also * supported. * * If the string is unknown, DVI is assumed. * * If the particular port is not supported by the platform, another port * (platform-specific) is chosen instead. */ static enum fsl_diu_monitor_port fsl_diu_name_to_port(const char *s) { enum fsl_diu_monitor_port port = FSL_DIU_PORT_DVI; unsigned long val; if (s) { if (!kstrtoul(s, 10, &val) && (val <= 2)) port = (enum fsl_diu_monitor_port) val; else if (strncmp(s, "lvds", 4) == 0) port = FSL_DIU_PORT_LVDS; else if (strncmp(s, "dlvds", 5) == 0) port = FSL_DIU_PORT_DLVDS; } if (diu_ops.valid_monitor_port) port = diu_ops.valid_monitor_port(port); return port; } /* * Workaround for failed writing desc register of planes. * Needed with MPC5121 DIU rev 2.0 silicon. */ void wr_reg_wa(u32 *reg, u32 val) { do { out_be32(reg, val); } while (in_be32(reg) != val); } static void fsl_diu_enable_panel(struct fb_info *info) { struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par; struct diu_ad *ad = mfbi->ad; struct fsl_diu_data *data = mfbi->parent; struct diu __iomem *hw = data->diu_reg; switch (mfbi->index) { case PLANE0: wr_reg_wa(&hw->desc[0], ad->paddr); break; case PLANE1_AOI0: cmfbi = &data->mfb[2]; if (hw->desc[1] != ad->paddr) { /* AOI0 closed */ if (cmfbi->count > 0) /* AOI1 open */ ad->next_ad = cpu_to_le32(cmfbi->ad->paddr); else ad->next_ad = 0; wr_reg_wa(&hw->desc[1], ad->paddr); } break; case PLANE2_AOI0: cmfbi = &data->mfb[4]; if (hw->desc[2] != ad->paddr) { /* AOI0 closed */ if (cmfbi->count > 0) /* AOI1 open */ ad->next_ad = cpu_to_le32(cmfbi->ad->paddr); else ad->next_ad = 0; wr_reg_wa(&hw->desc[2], ad->paddr); } break; case PLANE1_AOI1: pmfbi = &data->mfb[1]; ad->next_ad = 0; if (hw->desc[1] == data->dummy_ad.paddr) wr_reg_wa(&hw->desc[1], ad->paddr); else /* AOI0 open */ pmfbi->ad->next_ad = cpu_to_le32(ad->paddr); break; case PLANE2_AOI1: pmfbi = &data->mfb[3]; ad->next_ad = 0; if (hw->desc[2] == data->dummy_ad.paddr) wr_reg_wa(&hw->desc[2], ad->paddr); else /* AOI0 was open */ pmfbi->ad->next_ad = cpu_to_le32(ad->paddr); break; } } static void fsl_diu_disable_panel(struct fb_info *info) { struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par; struct diu_ad *ad = mfbi->ad; struct fsl_diu_data *data = mfbi->parent; struct diu __iomem *hw = data->diu_reg; switch (mfbi->index) { case PLANE0: wr_reg_wa(&hw->desc[0], 0); break; case PLANE1_AOI0: cmfbi = &data->mfb[2]; if (cmfbi->count > 0) /* AOI1 is open */ wr_reg_wa(&hw->desc[1], cmfbi->ad->paddr); /* move AOI1 to the first */ else /* AOI1 was closed */ wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr); /* close AOI 0 */ break; case PLANE2_AOI0: cmfbi = &data->mfb[4]; if (cmfbi->count > 0) /* AOI1 is open */ wr_reg_wa(&hw->desc[2], cmfbi->ad->paddr); /* move AOI1 to the first */ else /* AOI1 was closed */ wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr); /* close AOI 0 */ break; case PLANE1_AOI1: pmfbi = &data->mfb[1]; if (hw->desc[1] != ad->paddr) { /* AOI1 is not the first in the chain */ if (pmfbi->count > 0) /* AOI0 is open, must be the first */ pmfbi->ad->next_ad = 0; } else /* AOI1 is the first in the chain */ wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr); /* close AOI 1 */ break; case PLANE2_AOI1: pmfbi = &data->mfb[3]; if (hw->desc[2] != ad->paddr) { /* AOI1 is not the first in the chain */ if (pmfbi->count > 0) /* AOI0 is open, must be the first */ pmfbi->ad->next_ad = 0; } else /* AOI1 is the first in the chain */ wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr); /* close AOI 1 */ break; } } static void enable_lcdc(struct fb_info *info) { struct mfb_info *mfbi = info->par; struct fsl_diu_data *data = mfbi->parent; struct diu __iomem *hw = data->diu_reg; out_be32(&hw->diu_mode, MFB_MODE1); } static void disable_lcdc(struct fb_info *info) { struct mfb_info *mfbi = info->par; struct fsl_diu_data *data = mfbi->parent; struct diu __iomem *hw = data->diu_reg; out_be32(&hw->diu_mode, 0); } static void adjust_aoi_size_position(struct fb_var_screeninfo *var, struct fb_info *info) { struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par; struct fsl_diu_data *data = mfbi->parent; int available_height, upper_aoi_bottom; enum mfb_index index = mfbi->index; int lower_aoi_is_open, upper_aoi_is_open; __u32 base_plane_width, base_plane_height, upper_aoi_height; base_plane_width = data->fsl_diu_info[0].var.xres; base_plane_height = data->fsl_diu_info[0].var.yres; if (mfbi->x_aoi_d < 0) mfbi->x_aoi_d = 0; if (mfbi->y_aoi_d < 0) mfbi->y_aoi_d = 0; switch (index) { case PLANE0: if (mfbi->x_aoi_d != 0) mfbi->x_aoi_d = 0; if (mfbi->y_aoi_d != 0) mfbi->y_aoi_d = 0; break; case PLANE1_AOI0: case PLANE2_AOI0: lower_aoi_mfbi = data->fsl_diu_info[index+1].par; lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0; if (var->xres > base_plane_width) var->xres = base_plane_width; if ((mfbi->x_aoi_d + var->xres) > base_plane_width) mfbi->x_aoi_d = base_plane_width - var->xres; if (lower_aoi_is_open) available_height = lower_aoi_mfbi->y_aoi_d; else available_height = base_plane_height; if (var->yres > available_height) var->yres = available_height; if ((mfbi->y_aoi_d + var->yres) > available_height) mfbi->y_aoi_d = available_height - var->yres; break; case PLANE1_AOI1: case PLANE2_AOI1: upper_aoi_mfbi = data->fsl_diu_info[index-1].par; upper_aoi_height = data->fsl_diu_info[index-1].var.yres; upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height; upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0; if (var->xres > base_plane_width) var->xres = base_plane_width; if ((mfbi->x_aoi_d + var->xres) > base_plane_width) mfbi->x_aoi_d = base_plane_width - var->xres; if (mfbi->y_aoi_d < 0) mfbi->y_aoi_d = 0; if (upper_aoi_is_open) { if (mfbi->y_aoi_d < upper_aoi_bottom) mfbi->y_aoi_d = upper_aoi_bottom; available_height = base_plane_height - upper_aoi_bottom; } else available_height = base_plane_height; if (var->yres > available_height) var->yres = available_height; if ((mfbi->y_aoi_d + var->yres) > base_plane_height) mfbi->y_aoi_d = base_plane_height - var->yres; break; } } /* * Checks to see if the hardware supports the state requested by var passed * in. This function does not alter the hardware state! If the var passed in * is slightly off by what the hardware can support then we alter the var * PASSED in to what we can do. If the hardware doesn't support mode change * a -EINVAL will be returned by the upper layers. */ static int fsl_diu_check_var(struct fb_var_screeninfo *var, struct fb_info *info) { if (var->xres_virtual < var->xres) var->xres_virtual = var->xres; if (var->yres_virtual < var->yres) var->yres_virtual = var->yres; if (var->xoffset + info->var.xres > info->var.xres_virtual) var->xoffset = info->var.xres_virtual - info->var.xres; if (var->yoffset + info->var.yres > info->var.yres_virtual) var->yoffset = info->var.yres_virtual - info->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 = 0; 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 = 16; 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; /* Copy nonstd field to/from sync for fbset usage */ var->sync |= var->nonstd; var->nonstd |= var->sync; adjust_aoi_size_position(var, info); return 0; } static void set_fix(struct fb_info *info) { struct fb_fix_screeninfo *fix = &info->fix; struct fb_var_screeninfo *var = &info->var; struct mfb_info *mfbi = info->par; strncpy(fix->id, mfbi->id, sizeof(fix->id)); fix->line_length = var->xres_virtual * var->bits_per_pixel / 8; fix->type = FB_TYPE_PACKED_PIXELS; fix->accel = FB_ACCEL_NONE; fix->visual = FB_VISUAL_TRUECOLOR; fix->xpanstep = 1; fix->ypanstep = 1; } static void update_lcdc(struct fb_info *info) { struct fb_var_screeninfo *var = &info->var; struct mfb_info *mfbi = info->par; struct fsl_diu_data *data = mfbi->parent; struct diu __iomem *hw; int i, j; u8 *gamma_table_base; u32 temp; hw = data->diu_reg; if (diu_ops.set_monitor_port) diu_ops.set_monitor_port(data->monitor_port); gamma_table_base = data->gamma; /* Prep for DIU init - gamma table, cursor table */ for (i = 0; i <= 2; i++) for (j = 0; j <= 255; j++) *gamma_table_base++ = j; if (diu_ops.set_gamma_table) diu_ops.set_gamma_table(data->monitor_port, data->gamma); disable_lcdc(info); /* Program DIU registers */ out_be32(&hw->gamma, DMA_ADDR(data, gamma)); out_be32(&hw->bgnd, 0x007F7F7F); /* Set background to grey */ out_be32(&hw->disp_size, (var->yres << 16) | var->xres); /* Horizontal and vertical configuration register */ temp = var->left_margin << 22 | /* BP_H */ var->hsync_len << 11 | /* PW_H */ var->right_margin; /* FP_H */ out_be32(&hw->hsyn_para, temp); temp = var->upper_margin << 22 | /* BP_V */ var->vsync_len << 11 | /* PW_V */ var->lower_margin; /* FP_V */ out_be32(&hw->vsyn_para, temp); diu_ops.set_pixel_clock(var->pixclock); #ifndef CONFIG_PPC_MPC512x /* * The PLUT register is defined differently on the MPC5121 than it * is on other SOCs. Unfortunately, there's no documentation that * explains how it's supposed to be programmed, so for now, we leave * it at the default value on the MPC5121. * * For other SOCs, program it for the highest priority, which will * reduce the chance of underrun. Technically, we should scale the * priority to match the screen resolution, but doing that properly * requires delicate fine-tuning for each use-case. */ out_be32(&hw->plut, 0x01F5F666); #endif /* Enable the DIU */ enable_lcdc(info); } static int map_video_memory(struct fb_info *info) { u32 smem_len = info->fix.line_length * info->var.yres_virtual; void *p; p = alloc_pages_exact(smem_len, GFP_DMA | __GFP_ZERO); if (!p) { dev_err(info->dev, "unable to allocate fb memory\n"); return -ENOMEM; } mutex_lock(&info->mm_lock); info->screen_base = p; info->fix.smem_start = virt_to_phys(info->screen_base); info->fix.smem_len = smem_len; mutex_unlock(&info->mm_lock); info->screen_size = info->fix.smem_len; return 0; } static void unmap_video_memory(struct fb_info *info) { void *p = info->screen_base; size_t l = info->fix.smem_len; mutex_lock(&info->mm_lock); info->screen_base = NULL; info->fix.smem_start = 0; info->fix.smem_len = 0; mutex_unlock(&info->mm_lock); if (p) free_pages_exact(p, l); } /* * Using the fb_var_screeninfo in fb_info we set the aoi of this * particular framebuffer. It is a light version of fsl_diu_set_par. */ static int fsl_diu_set_aoi(struct fb_info *info) { struct fb_var_screeninfo *var = &info->var; struct mfb_info *mfbi = info->par; struct diu_ad *ad = mfbi->ad; /* AOI should not be greater than display size */ ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset); ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d); return 0; } /** * fsl_diu_get_pixel_format: return the pixel format for a given color depth * * The pixel format is a 32-bit value that determine which bits in each * pixel are to be used for each color. This is the default function used * if the platform does not define its own version. */ static u32 fsl_diu_get_pixel_format(unsigned int bits_per_pixel) { #define PF_BYTE_F 0x10000000 #define PF_ALPHA_C_MASK 0x0E000000 #define PF_ALPHA_C_SHIFT 25 #define PF_BLUE_C_MASK 0x01800000 #define PF_BLUE_C_SHIFT 23 #define PF_GREEN_C_MASK 0x00600000 #define PF_GREEN_C_SHIFT 21 #define PF_RED_C_MASK 0x00180000 #define PF_RED_C_SHIFT 19 #define PF_PALETTE 0x00040000 #define PF_PIXEL_S_MASK 0x00030000 #define PF_PIXEL_S_SHIFT 16 #define PF_COMP_3_MASK 0x0000F000 #define PF_COMP_3_SHIFT 12 #define PF_COMP_2_MASK 0x00000F00 #define PF_COMP_2_SHIFT 8 #define PF_COMP_1_MASK 0x000000F0 #define PF_COMP_1_SHIFT 4 #define PF_COMP_0_MASK 0x0000000F #define PF_COMP_0_SHIFT 0 #define MAKE_PF(alpha, red, green, blue, size, c0, c1, c2, c3) \ cpu_to_le32(PF_BYTE_F | (alpha << PF_ALPHA_C_SHIFT) | \ (blue << PF_BLUE_C_SHIFT) | (green << PF_GREEN_C_SHIFT) | \ (red << PF_RED_C_SHIFT) | (c3 << PF_COMP_3_SHIFT) | \ (c2 << PF_COMP_2_SHIFT) | (c1 << PF_COMP_1_SHIFT) | \ (c0 << PF_COMP_0_SHIFT) | (size << PF_PIXEL_S_SHIFT)) switch (bits_per_pixel) { case 32: /* 0x88883316 */ return MAKE_PF(3, 2, 1, 0, 3, 8, 8, 8, 8); case 24: /* 0x88082219 */ return MAKE_PF(4, 0, 1, 2, 2, 8, 8, 8, 0); case 16: /* 0x65053118 */ return MAKE_PF(4, 2, 1, 0, 1, 5, 6, 5, 0); default: pr_err("fsl-diu: unsupported color depth %u\n", bits_per_pixel); return 0; } } /* * Copies a cursor image from user space to the proper place in driver * memory so that the hardware can display the cursor image. * * Cursor data is represented as a sequence of 'width' bits packed into bytes. * That is, the first 8 bits are in the first byte, the second 8 bits in the * second byte, and so on. Therefore, the each row of the cursor is (width + * 7) / 8 bytes of 'data' * * The DIU only supports cursors up to 32x32 (MAX_CURS). We reject cursors * larger than this, so we already know that 'width' <= 32. Therefore, we can * simplify our code by using a 32-bit big-endian integer ("line") to read in * a single line of pixels, and only look at the top 'width' bits of that * integer. * * This could result in an unaligned 32-bit read. For example, if the cursor * is 24x24, then the first three bytes of 'image' contain the pixel data for * the top line of the cursor. We do a 32-bit read of 'image', but we look * only at the top 24 bits. Then we increment 'image' by 3 bytes. The next * read is unaligned. The only problem is that we might read past the end of * 'image' by 1-3 bytes, but that should not cause any problems. */ static void fsl_diu_load_cursor_image(struct fb_info *info, const void *image, uint16_t bg, uint16_t fg, unsigned int width, unsigned int height) { struct mfb_info *mfbi = info->par; struct fsl_diu_data *data = mfbi->parent; __le16 *cursor = data->cursor; __le16 _fg = cpu_to_le16(fg); __le16 _bg = cpu_to_le16(bg); unsigned int h, w; for (h = 0; h < height; h++) { uint32_t mask = 1 << 31; uint32_t line = be32_to_cpup(image); for (w = 0; w < width; w++) { cursor[w] = (line & mask) ? _fg : _bg; mask >>= 1; } cursor += MAX_CURS; image += DIV_ROUND_UP(width, 8); } } /* * Set a hardware cursor. The image data for the cursor is passed via the * fb_cursor object. */ static int fsl_diu_cursor(struct fb_info *info, struct fb_cursor *cursor) { struct mfb_info *mfbi = info->par; struct fsl_diu_data *data = mfbi->parent; struct diu __iomem *hw = data->diu_reg; if (cursor->image.width > MAX_CURS || cursor->image.height > MAX_CURS) return -EINVAL; /* The cursor size has changed */ if (cursor->set & FB_CUR_SETSIZE) { /* * The DIU cursor is a fixed size, so when we get this * message, instead of resizing the cursor, we just clear * all the image data, in expectation of new data. However, * in tests this control does not appear to be normally * called. */ memset(data->cursor, 0, sizeof(data->cursor)); } /* The cursor position has changed (cursor->image.dx|dy) */ if (cursor->set & FB_CUR_SETPOS) { uint32_t xx, yy; yy = (cursor->image.dy - info->var.yoffset) & 0x7ff; xx = (cursor->image.dx - info->var.xoffset) & 0x7ff; out_be32(&hw->curs_pos, yy << 16 | xx); } /* * FB_CUR_SETIMAGE - the cursor image has changed * FB_CUR_SETCMAP - the cursor colors has changed * FB_CUR_SETSHAPE - the cursor bitmask has changed */ if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETCMAP | FB_CUR_SETIMAGE)) { /* * Determine the size of the cursor image data. Normally, * it's 8x16. */ unsigned int image_size = DIV_ROUND_UP(cursor->image.width, 8) * cursor->image.height; unsigned int image_words = DIV_ROUND_UP(image_size, sizeof(uint32_t)); unsigned int bg_idx = cursor->image.bg_color; unsigned int fg_idx = cursor->image.fg_color; uint32_t *image, *source, *mask; uint16_t fg, bg; unsigned int i; if (info->state != FBINFO_STATE_RUNNING) return 0; bg = ((info->cmap.red[bg_idx] & 0xf8) << 7) | ((info->cmap.green[bg_idx] & 0xf8) << 2) | ((info->cmap.blue[bg_idx] & 0xf8) >> 3) | 1 << 15; fg = ((info->cmap.red[fg_idx] & 0xf8) << 7) | ((info->cmap.green[fg_idx] & 0xf8) << 2) | ((info->cmap.blue[fg_idx] & 0xf8) >> 3) | 1 << 15; /* Use 32-bit operations on the data to improve performance */ image = (uint32_t *)data->next_cursor; source = (uint32_t *)cursor->image.data; mask = (uint32_t *)cursor->mask; if (cursor->rop == ROP_XOR) for (i = 0; i < image_words; i++) image[i] = source[i] ^ mask[i]; else for (i = 0; i < image_words; i++) image[i] = source[i] & mask[i]; fsl_diu_load_cursor_image(info, image, bg, fg, cursor->image.width, cursor->image.height); } /* * Show or hide the cursor. The cursor data is always stored in the * 'cursor' memory block, and the actual cursor position is always in * the DIU's CURS_POS register. To hide the cursor, we redirect the * CURSOR register to a blank cursor. The show the cursor, we * redirect the CURSOR register to the real cursor data. */ if (cursor->enable) out_be32(&hw->cursor, DMA_ADDR(data, cursor)); else out_be32(&hw->cursor, DMA_ADDR(data, blank_cursor)); return 0; } /* * Using the fb_var_screeninfo in fb_info we set the resolution of this * particular framebuffer. This function alters the fb_fix_screeninfo stored * in fb_info. It does not alter var in fb_info since we are using that * data. This means we depend on the data in var inside fb_info to be * supported by the hardware. fsl_diu_check_var is always called before * fsl_diu_set_par to ensure this. */ static int fsl_diu_set_par(struct fb_info *info) { unsigned long len; struct fb_var_screeninfo *var = &info->var; struct mfb_info *mfbi = info->par; struct fsl_diu_data *data = mfbi->parent; struct diu_ad *ad = mfbi->ad; struct diu __iomem *hw; hw = data->diu_reg; set_fix(info); len = info->var.yres_virtual * info->fix.line_length; /* Alloc & dealloc each time resolution/bpp change */ if (len != info->fix.smem_len) { if (info->fix.smem_start) unmap_video_memory(info); /* Memory allocation for framebuffer */ if (map_video_memory(info)) { dev_err(info->dev, "unable to allocate fb memory 1\n"); return -ENOMEM; } } if (diu_ops.get_pixel_format) ad->pix_fmt = diu_ops.get_pixel_format(data->monitor_port, var->bits_per_pixel); else ad->pix_fmt = fsl_diu_get_pixel_format(var->bits_per_pixel); ad->addr = cpu_to_le32(info->fix.smem_start); ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) | var->xres_virtual) | mfbi->g_alpha; /* AOI should not be greater than display size */ ad->aoi_size = cpu_to_le32((var->yres << 16) | var->xres); ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset); ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d); /* Disable chroma keying function */ ad->ckmax_r = 0; ad->ckmax_g = 0; ad->ckmax_b = 0; ad->ckmin_r = 255; ad->ckmin_g = 255; ad->ckmin_b = 255; if (mfbi->index == PLANE0) update_lcdc(info); return 0; } static inline __u32 CNVT_TOHW(__u32 val, __u32 width) { return ((val << width) + 0x7FFF - val) >> 16; } /* * Set a single color register. The values supplied have a 16 bit magnitude * which needs to be scaled in this function for the hardware. Things to take * into consideration are how many color registers, if any, are supported with * the current color visual. With truecolor mode no color palettes are * supported. Here a pseudo palette is created which we store the value in * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited * color palette. */ static int fsl_diu_setcolreg(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue, unsigned int transp, struct fb_info *info) { int ret = 1; /* * If greyscale is true, then we convert the RGB value * to greyscale no matter what visual we are using. */ if (info->var.grayscale) red = green = blue = (19595 * red + 38470 * green + 7471 * blue) >> 16; switch (info->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 = info->pseudo_palette; u32 v; red = CNVT_TOHW(red, info->var.red.length); green = CNVT_TOHW(green, info->var.green.length); blue = CNVT_TOHW(blue, info->var.blue.length); transp = CNVT_TOHW(transp, info->var.transp.length); v = (red << info->var.red.offset) | (green << info->var.green.offset) | (blue << info->var.blue.offset) | (transp << info->var.transp.offset); pal[regno] = v; ret = 0; } break; } return ret; } /* * Pan (or wrap, depending on the `vmode' field) the display using the * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values * don't fit, return -EINVAL. */ static int fsl_diu_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) { if ((info->var.xoffset == var->xoffset) && (info->var.yoffset == var->yoffset)) return 0; /* No change, do nothing */ if (var->xoffset + info->var.xres > info->var.xres_virtual || var->yoffset + info->var.yres > info->var.yres_virtual) return -EINVAL; info->var.xoffset = var->xoffset; info->var.yoffset = var->yoffset; if (var->vmode & FB_VMODE_YWRAP) info->var.vmode |= FB_VMODE_YWRAP; else info->var.vmode &= ~FB_VMODE_YWRAP; fsl_diu_set_aoi(info); return 0; } static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) { struct mfb_info *mfbi = info->par; struct diu_ad *ad = mfbi->ad; struct mfb_chroma_key ck; unsigned char global_alpha; struct aoi_display_offset aoi_d; __u32 pix_fmt; void __user *buf = (void __user *)arg; if (!arg) return -EINVAL; dev_dbg(info->dev, "ioctl %08x (dir=%s%s type=%u nr=%u size=%u)\n", cmd, _IOC_DIR(cmd) & _IOC_READ ? "R" : "", _IOC_DIR(cmd) & _IOC_WRITE ? "W" : "", _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd)); switch (cmd) { case MFB_SET_PIXFMT_OLD: dev_warn(info->dev, "MFB_SET_PIXFMT value of 0x%08x is deprecated.\n", MFB_SET_PIXFMT_OLD); case MFB_SET_PIXFMT: if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt))) return -EFAULT; ad->pix_fmt = pix_fmt; break; case MFB_GET_PIXFMT_OLD: dev_warn(info->dev, "MFB_GET_PIXFMT value of 0x%08x is deprecated.\n", MFB_GET_PIXFMT_OLD); case MFB_GET_PIXFMT: pix_fmt = ad->pix_fmt; if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt))) return -EFAULT; break; case MFB_SET_AOID: if (copy_from_user(&aoi_d, buf, sizeof(aoi_d))) return -EFAULT; mfbi->x_aoi_d = aoi_d.x_aoi_d; mfbi->y_aoi_d = aoi_d.y_aoi_d; fsl_diu_check_var(&info->var, info); fsl_diu_set_aoi(info); break; case MFB_GET_AOID: aoi_d.x_aoi_d = mfbi->x_aoi_d; aoi_d.y_aoi_d = mfbi->y_aoi_d; if (copy_to_user(buf, &aoi_d, sizeof(aoi_d))) return -EFAULT; break; case MFB_GET_ALPHA: global_alpha = mfbi->g_alpha; if (copy_to_user(buf, &global_alpha, sizeof(global_alpha))) return -EFAULT; break; case MFB_SET_ALPHA: /* set panel information */ if (copy_from_user(&global_alpha, buf, sizeof(global_alpha))) return -EFAULT; ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) | (global_alpha & 0xff); mfbi->g_alpha = global_alpha; break; case MFB_SET_CHROMA_KEY: /* set panel winformation */ if (copy_from_user(&ck, buf, sizeof(ck))) return -EFAULT; if (ck.enable && (ck.red_max < ck.red_min || ck.green_max < ck.green_min || ck.blue_max < ck.blue_min)) return -EINVAL; if (!ck.enable) { ad->ckmax_r = 0; ad->ckmax_g = 0; ad->ckmax_b = 0; ad->ckmin_r = 255; ad->ckmin_g = 255; ad->ckmin_b = 255; } else { ad->ckmax_r = ck.red_max; ad->ckmax_g = ck.green_max; ad->ckmax_b = ck.blue_max; ad->ckmin_r = ck.red_min; ad->ckmin_g = ck.green_min; ad->ckmin_b = ck.blue_min; } break; #ifdef CONFIG_PPC_MPC512x case MFB_SET_GAMMA: { struct fsl_diu_data *data = mfbi->parent; if (copy_from_user(data->gamma, buf, sizeof(data->gamma))) return -EFAULT; setbits32(&data->diu_reg->gamma, 0); /* Force table reload */ break; } case MFB_GET_GAMMA: { struct fsl_diu_data *data = mfbi->parent; if (copy_to_user(buf, data->gamma, sizeof(data->gamma))) return -EFAULT; break; } #endif default: dev_err(info->dev, "unknown ioctl command (0x%08X)\n", cmd); return -ENOIOCTLCMD; } return 0; } static inline void fsl_diu_enable_interrupts(struct fsl_diu_data *data) { u32 int_mask = INT_UNDRUN; /* enable underrun detection */ if (IS_ENABLED(CONFIG_NOT_COHERENT_CACHE)) int_mask |= INT_VSYNC; /* enable vertical sync */ clrbits32(&data->diu_reg->int_mask, int_mask); } /* turn on fb if count == 1 */ static int fsl_diu_open(struct fb_info *info, int user) { struct mfb_info *mfbi = info->par; int res = 0; /* free boot splash memory on first /dev/fb0 open */ if ((mfbi->index == PLANE0) && diu_ops.release_bootmem) diu_ops.release_bootmem(); spin_lock(&diu_lock); mfbi->count++; if (mfbi->count == 1) { fsl_diu_check_var(&info->var, info); res = fsl_diu_set_par(info); if (res < 0) mfbi->count--; else { fsl_diu_enable_interrupts(mfbi->parent); fsl_diu_enable_panel(info); } } spin_unlock(&diu_lock); return res; } /* turn off fb if count == 0 */ static int fsl_diu_release(struct fb_info *info, int user) { struct mfb_info *mfbi = info->par; int res = 0; spin_lock(&diu_lock); mfbi->count--; if (mfbi->count == 0) { struct fsl_diu_data *data = mfbi->parent; bool disable = true; int i; /* Disable interrupts only if all AOIs are closed */ for (i = 0; i < NUM_AOIS; i++) { struct mfb_info *mi = data->fsl_diu_info[i].par; if (mi->count) disable = false; } if (disable) out_be32(&data->diu_reg->int_mask, 0xffffffff); fsl_diu_disable_panel(info); } spin_unlock(&diu_lock); return res; } static struct fb_ops fsl_diu_ops = { .owner = THIS_MODULE, .fb_check_var = fsl_diu_check_var, .fb_set_par = fsl_diu_set_par, .fb_setcolreg = fsl_diu_setcolreg, .fb_pan_display = fsl_diu_pan_display, .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, .fb_ioctl = fsl_diu_ioctl, .fb_open = fsl_diu_open, .fb_release = fsl_diu_release, .fb_cursor = fsl_diu_cursor, }; static int install_fb(struct fb_info *info) { int rc; struct mfb_info *mfbi = info->par; struct fsl_diu_data *data = mfbi->parent; const char *aoi_mode, *init_aoi_mode = "320x240"; struct fb_videomode *db = fsl_diu_mode_db; unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db); int has_default_mode = 1; info->var.activate = FB_ACTIVATE_NOW; info->fbops = &fsl_diu_ops; info->flags = FBINFO_DEFAULT | FBINFO_VIRTFB | FBINFO_PARTIAL_PAN_OK | FBINFO_READS_FAST; info->pseudo_palette = mfbi->pseudo_palette; rc = fb_alloc_cmap(&info->cmap, 16, 0); if (rc) return rc; if (mfbi->index == PLANE0) { if (data->has_edid) { /* Now build modedb from EDID */ fb_edid_to_monspecs(data->edid_data, &info->monspecs); fb_videomode_to_modelist(info->monspecs.modedb, info->monspecs.modedb_len, &info->modelist); db = info->monspecs.modedb; dbsize = info->monspecs.modedb_len; } aoi_mode = fb_mode; } else { aoi_mode = init_aoi_mode; } rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize, NULL, default_bpp); if (!rc) { /* * For plane 0 we continue and look into * driver's internal modedb. */ if ((mfbi->index == PLANE0) && data->has_edid) has_default_mode = 0; else return -EINVAL; } if (!has_default_mode) { rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db, ARRAY_SIZE(fsl_diu_mode_db), NULL, default_bpp); if (rc) has_default_mode = 1; } /* Still not found, use preferred mode from database if any */ if (!has_default_mode && info->monspecs.modedb) { struct fb_monspecs *specs = &info->monspecs; struct fb_videomode *modedb = &specs->modedb[0]; /* * Get preferred timing. If not found, * first mode in database will be used. */ if (specs->misc & FB_MISC_1ST_DETAIL) { int i; for (i = 0; i < specs->modedb_len; i++) { if (specs->modedb[i].flag & FB_MODE_IS_FIRST) { modedb = &specs->modedb[i]; break; } } } info->var.bits_per_pixel = default_bpp; fb_videomode_to_var(&info->var, modedb); } if (fsl_diu_check_var(&info->var, info)) { dev_err(info->dev, "fsl_diu_check_var failed\n"); unmap_video_memory(info); fb_dealloc_cmap(&info->cmap); return -EINVAL; } if (register_framebuffer(info) < 0) { dev_err(info->dev, "register_framebuffer failed\n"); unmap_video_memory(info); fb_dealloc_cmap(&info->cmap); return -EINVAL; } mfbi->registered = 1; dev_info(info->dev, "%s registered successfully\n", mfbi->id); return 0; } static void uninstall_fb(struct fb_info *info) { struct mfb_info *mfbi = info->par; if (!mfbi->registered) return; unregister_framebuffer(info); unmap_video_memory(info); fb_dealloc_cmap(&info->cmap); mfbi->registered = 0; } static irqreturn_t fsl_diu_isr(int irq, void *dev_id) { struct diu __iomem *hw = dev_id; uint32_t status = in_be32(&hw->int_status); if (status) { /* This is the workaround for underrun */ if (status & INT_UNDRUN) { out_be32(&hw->diu_mode, 0); udelay(1); out_be32(&hw->diu_mode, 1); } #if defined(CONFIG_NOT_COHERENT_CACHE) else if (status & INT_VSYNC) { unsigned int i; for (i = 0; i < coherence_data_size; i += d_cache_line_size) __asm__ __volatile__ ( "dcbz 0, %[input]" ::[input]"r"(&coherence_data[i])); } #endif return IRQ_HANDLED; } return IRQ_NONE; } #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. */ static int fsl_diu_suspend(struct platform_device *ofdev, pm_message_t state) { struct fsl_diu_data *data; data = dev_get_drvdata(&ofdev->dev); disable_lcdc(data->fsl_diu_info); return 0; } static int fsl_diu_resume(struct platform_device *ofdev) { struct fsl_diu_data *data; unsigned int i; data = dev_get_drvdata(&ofdev->dev); fsl_diu_enable_interrupts(data); update_lcdc(data->fsl_diu_info); for (i = 0; i < NUM_AOIS; i++) { if (data->mfb[i].count) fsl_diu_enable_panel(&data->fsl_diu_info[i]); } return 0; } #else #define fsl_diu_suspend NULL #define fsl_diu_resume NULL #endif /* CONFIG_PM */ static ssize_t store_monitor(struct device *device, struct device_attribute *attr, const char *buf, size_t count) { enum fsl_diu_monitor_port old_monitor_port; struct fsl_diu_data *data = container_of(attr, struct fsl_diu_data, dev_attr); old_monitor_port = data->monitor_port; data->monitor_port = fsl_diu_name_to_port(buf); if (old_monitor_port != data->monitor_port) { /* All AOIs need adjust pixel format * fsl_diu_set_par only change the pixsel format here * unlikely to fail. */ unsigned int i; for (i=0; i < NUM_AOIS; i++) fsl_diu_set_par(&data->fsl_diu_info[i]); } return count; } static ssize_t show_monitor(struct device *device, struct device_attribute *attr, char *buf) { struct fsl_diu_data *data = container_of(attr, struct fsl_diu_data, dev_attr); switch (data->monitor_port) { case FSL_DIU_PORT_DVI: return sprintf(buf, "DVI\n"); case FSL_DIU_PORT_LVDS: return sprintf(buf, "Single-link LVDS\n"); case FSL_DIU_PORT_DLVDS: return sprintf(buf, "Dual-link LVDS\n"); } return 0; } static int fsl_diu_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct mfb_info *mfbi; struct fsl_diu_data *data; dma_addr_t dma_addr; /* DMA addr of fsl_diu_data struct */ const void *prop; unsigned int i; int ret; data = dmam_alloc_coherent(&pdev->dev, sizeof(struct fsl_diu_data), &dma_addr, GFP_DMA | __GFP_ZERO); if (!data) return -ENOMEM; data->dma_addr = dma_addr; /* * dma_alloc_coherent() uses a page allocator, so the address is * always page-aligned. We need the memory to be 32-byte aligned, * so that's good. However, if one day the allocator changes, we * need to catch that. It's not worth the effort to handle unaligned * alloctions now because it's highly unlikely to ever be a problem. */ if ((unsigned long)data & 31) { dev_err(&pdev->dev, "misaligned allocation"); ret = -ENOMEM; goto error; } spin_lock_init(&data->reg_lock); for (i = 0; i < NUM_AOIS; i++) { struct fb_info *info = &data->fsl_diu_info[i]; info->device = &pdev->dev; info->par = &data->mfb[i]; /* * We store the physical address of the AD in the reserved * 'paddr' field of the AD itself. */ data->ad[i].paddr = DMA_ADDR(data, ad[i]); info->fix.smem_start = 0; /* Initialize the AOI data structure */ mfbi = info->par; memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info)); mfbi->parent = data; mfbi->ad = &data->ad[i]; } /* Get the EDID data from the device tree, if present */ prop = of_get_property(np, "edid", &ret); if (prop && ret == EDID_LENGTH) { memcpy(data->edid_data, prop, EDID_LENGTH); data->has_edid = true; } data->diu_reg = of_iomap(np, 0); if (!data->diu_reg) { dev_err(&pdev->dev, "cannot map DIU registers\n"); ret = -EFAULT; goto error; } /* Get the IRQ of the DIU */ data->irq = irq_of_parse_and_map(np, 0); if (!data->irq) { dev_err(&pdev->dev, "could not get DIU IRQ\n"); ret = -EINVAL; goto error; } data->monitor_port = monitor_port; /* Initialize the dummy Area Descriptor */ data->dummy_ad.addr = cpu_to_le32(DMA_ADDR(data, dummy_aoi)); data->dummy_ad.pix_fmt = 0x88882317; data->dummy_ad.src_size_g_alpha = cpu_to_le32((4 << 12) | 4); data->dummy_ad.aoi_size = cpu_to_le32((4 << 16) | 2); data->dummy_ad.offset_xyi = 0; data->dummy_ad.offset_xyd = 0; data->dummy_ad.next_ad = 0; data->dummy_ad.paddr = DMA_ADDR(data, dummy_ad); /* * Let DIU continue to display splash screen if it was pre-initialized * by the bootloader; otherwise, clear the display. */ if (in_be32(&data->diu_reg->diu_mode) == MFB_MODE0) out_be32(&data->diu_reg->desc[0], 0); out_be32(&data->diu_reg->desc[1], data->dummy_ad.paddr); out_be32(&data->diu_reg->desc[2], data->dummy_ad.paddr); /* * Older versions of U-Boot leave interrupts enabled, so disable * all of them and clear the status register. */ out_be32(&data->diu_reg->int_mask, 0xffffffff); in_be32(&data->diu_reg->int_status); ret = request_irq(data->irq, fsl_diu_isr, 0, "fsl-diu-fb", data->diu_reg); if (ret) { dev_err(&pdev->dev, "could not claim irq\n"); goto error; } for (i = 0; i < NUM_AOIS; i++) { ret = install_fb(&data->fsl_diu_info[i]); if (ret) { dev_err(&pdev->dev, "could not register fb %d\n", i); free_irq(data->irq, data->diu_reg); goto error; } } sysfs_attr_init(&data->dev_attr.attr); data->dev_attr.attr.name = "monitor"; data->dev_attr.attr.mode = S_IRUGO|S_IWUSR; data->dev_attr.show = show_monitor; data->dev_attr.store = store_monitor; ret = device_create_file(&pdev->dev, &data->dev_attr); if (ret) { dev_err(&pdev->dev, "could not create sysfs file %s\n", data->dev_attr.attr.name); } dev_set_drvdata(&pdev->dev, data); return 0; error: for (i = 0; i < NUM_AOIS; i++) uninstall_fb(&data->fsl_diu_info[i]); iounmap(data->diu_reg); return ret; } static int fsl_diu_remove(struct platform_device *pdev) { struct fsl_diu_data *data; int i; data = dev_get_drvdata(&pdev->dev); disable_lcdc(&data->fsl_diu_info[0]); free_irq(data->irq, data->diu_reg); for (i = 0; i < NUM_AOIS; i++) uninstall_fb(&data->fsl_diu_info[i]); iounmap(data->diu_reg); return 0; } #ifndef MODULE static int __init fsl_diu_setup(char *options) { char *opt; unsigned long val; if (!options || !*options) return 0; while ((opt = strsep(&options, ",")) != NULL) { if (!*opt) continue; if (!strncmp(opt, "monitor=", 8)) { monitor_port = fsl_diu_name_to_port(opt + 8); } else if (!strncmp(opt, "bpp=", 4)) { if (!kstrtoul(opt + 4, 10, &val)) default_bpp = val; } else fb_mode = opt; } return 0; } #endif static const struct of_device_id fsl_diu_match[] = { #ifdef CONFIG_PPC_MPC512x { .compatible = "fsl,mpc5121-diu", }, #endif { .compatible = "fsl,diu", }, {} }; MODULE_DEVICE_TABLE(of, fsl_diu_match); static struct platform_driver fsl_diu_driver = { .driver = { .name = "fsl-diu-fb", .of_match_table = fsl_diu_match, }, .probe = fsl_diu_probe, .remove = fsl_diu_remove, .suspend = fsl_diu_suspend, .resume = fsl_diu_resume, }; static int __init fsl_diu_init(void) { #ifdef CONFIG_NOT_COHERENT_CACHE struct device_node *np; const u32 *prop; #endif int ret; #ifndef MODULE char *option; /* * For kernel boot options (in 'video=xxxfb:<options>' format) */ if (fb_get_options("fslfb", &option)) return -ENODEV; fsl_diu_setup(option); #else monitor_port = fsl_diu_name_to_port(monitor_string); #endif /* * Must to verify set_pixel_clock. If not implement on platform, * then that means that there is no platform support for the DIU. */ if (!diu_ops.set_pixel_clock) return -ENODEV; pr_info("Freescale Display Interface Unit (DIU) framebuffer driver\n"); #ifdef CONFIG_NOT_COHERENT_CACHE np = of_get_cpu_node(0, NULL); if (!np) { pr_err("fsl-diu-fb: can't find 'cpu' device node\n"); return -ENODEV; } prop = of_get_property(np, "d-cache-size", NULL); if (prop == NULL) { pr_err("fsl-diu-fb: missing 'd-cache-size' property' " "in 'cpu' node\n"); of_node_put(np); return -ENODEV; } /* * Freescale PLRU requires 13/8 times the cache size to do a proper * displacement flush */ coherence_data_size = be32_to_cpup(prop) * 13; coherence_data_size /= 8; pr_debug("fsl-diu-fb: coherence data size is %zu bytes\n", coherence_data_size); prop = of_get_property(np, "d-cache-line-size", NULL); if (prop == NULL) { pr_err("fsl-diu-fb: missing 'd-cache-line-size' property' " "in 'cpu' node\n"); of_node_put(np); return -ENODEV; } d_cache_line_size = be32_to_cpup(prop); pr_debug("fsl-diu-fb: cache lines size is %u bytes\n", d_cache_line_size); of_node_put(np); coherence_data = vmalloc(coherence_data_size); if (!coherence_data) return -ENOMEM; #endif ret = platform_driver_register(&fsl_diu_driver); if (ret) { pr_err("fsl-diu-fb: failed to register platform driver\n"); #if defined(CONFIG_NOT_COHERENT_CACHE) vfree(coherence_data); #endif } return ret; } static void __exit fsl_diu_exit(void) { platform_driver_unregister(&fsl_diu_driver); #if defined(CONFIG_NOT_COHERENT_CACHE) vfree(coherence_data); #endif } module_init(fsl_diu_init); module_exit(fsl_diu_exit); MODULE_AUTHOR("York Sun <yorksun@freescale.com>"); MODULE_DESCRIPTION("Freescale DIU framebuffer driver"); MODULE_LICENSE("GPL"); module_param_named(mode, fb_mode, charp, 0); MODULE_PARM_DESC(mode, "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" "); module_param_named(bpp, default_bpp, ulong, 0); MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified in 'mode'"); module_param_named(monitor, monitor_string, charp, 0); MODULE_PARM_DESC(monitor, "Specify the monitor port " "(\"dvi\", \"lvds\", or \"dlvds\") if supported by the platform");
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