diff options
Diffstat (limited to 'drivers/video/sm501fb.c')
| -rw-r--r-- | drivers/video/sm501fb.c | 1853 |
1 files changed, 0 insertions, 1853 deletions
diff --git a/drivers/video/sm501fb.c b/drivers/video/sm501fb.c deleted file mode 100644 index 742b5c656d6..00000000000 --- a/drivers/video/sm501fb.c +++ /dev/null @@ -1,1853 +0,0 @@ -/* linux/drivers/video/sm501fb.c - * - * Copyright (c) 2006 Simtec Electronics - * Vincent Sanders <vince@simtec.co.uk> - * Ben Dooks <ben@simtec.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Framebuffer driver for the Silicon Motion SM501 - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/tty.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/fb.h> -#include <linux/init.h> -#include <linux/vmalloc.h> -#include <linux/dma-mapping.h> -#include <linux/interrupt.h> -#include <linux/workqueue.h> -#include <linux/wait.h> -#include <linux/platform_device.h> -#include <linux/clk.h> -#include <linux/console.h> - -#include <asm/io.h> -#include <asm/uaccess.h> -#include <asm/div64.h> - -#ifdef CONFIG_PM -#include <linux/pm.h> -#endif - -#include <linux/sm501.h> -#include <linux/sm501-regs.h> - -#define NR_PALETTE 256 - -enum sm501_controller { - HEAD_CRT = 0, - HEAD_PANEL = 1, -}; - -/* SM501 memory address */ -struct sm501_mem { - unsigned long size; - unsigned long sm_addr; - void __iomem *k_addr; -}; - -/* private data that is shared between all frambuffers* */ -struct sm501fb_info { - struct device *dev; - struct fb_info *fb[2]; /* fb info for both heads */ - struct resource *fbmem_res; /* framebuffer resource */ - struct resource *regs_res; /* registers resource */ - struct sm501_platdata_fb *pdata; /* our platform data */ - - unsigned long pm_crt_ctrl; /* pm: crt ctrl save */ - - int irq; - int swap_endian; /* set to swap rgb=>bgr */ - void __iomem *regs; /* remapped registers */ - void __iomem *fbmem; /* remapped framebuffer */ - size_t fbmem_len; /* length of remapped region */ -}; - -/* per-framebuffer private data */ -struct sm501fb_par { - u32 pseudo_palette[16]; - - enum sm501_controller head; - struct sm501_mem cursor; - struct sm501_mem screen; - struct fb_ops ops; - - void *store_fb; - void *store_cursor; - void __iomem *cursor_regs; - struct sm501fb_info *info; -}; - -/* Helper functions */ - -static inline int h_total(struct fb_var_screeninfo *var) -{ - return var->xres + var->left_margin + - var->right_margin + var->hsync_len; -} - -static inline int v_total(struct fb_var_screeninfo *var) -{ - return var->yres + var->upper_margin + - var->lower_margin + var->vsync_len; -} - -/* sm501fb_sync_regs() - * - * This call is mainly for PCI bus systems where we need to - * ensure that any writes to the bus are completed before the - * next phase, or after completing a function. -*/ - -static inline void sm501fb_sync_regs(struct sm501fb_info *info) -{ - readl(info->regs); -} - -/* sm501_alloc_mem - * - * This is an attempt to lay out memory for the two framebuffers and - * everything else - * - * |fbmem_res->start fbmem_res->end| - * | | - * |fb[0].fix.smem_start | |fb[1].fix.smem_start | 2K | - * |-> fb[0].fix.smem_len <-| spare |-> fb[1].fix.smem_len <-|-> cursors <-| - * - * The "spare" space is for the 2d engine data - * the fixed is space for the cursors (2x1Kbyte) - * - * we need to allocate memory for the 2D acceleration engine - * command list and the data for the engine to deal with. - * - * - all allocations must be 128bit aligned - * - cursors are 64x64x2 bits (1Kbyte) - * - */ - -#define SM501_MEMF_CURSOR (1) -#define SM501_MEMF_PANEL (2) -#define SM501_MEMF_CRT (4) -#define SM501_MEMF_ACCEL (8) - -static int sm501_alloc_mem(struct sm501fb_info *inf, struct sm501_mem *mem, - unsigned int why, size_t size) -{ - unsigned int ptr = 0; - - switch (why) { - case SM501_MEMF_CURSOR: - ptr = inf->fbmem_len - size; - inf->fbmem_len = ptr; - break; - - case SM501_MEMF_PANEL: - ptr = inf->fbmem_len - size; - if (ptr < inf->fb[0]->fix.smem_len) - return -ENOMEM; - - break; - - case SM501_MEMF_CRT: - ptr = 0; - break; - - case SM501_MEMF_ACCEL: - ptr = inf->fb[0]->fix.smem_len; - - if ((ptr + size) > - (inf->fb[1]->fix.smem_start - inf->fbmem_res->start)) - return -ENOMEM; - break; - - default: - return -EINVAL; - } - - mem->size = size; - mem->sm_addr = ptr; - mem->k_addr = inf->fbmem + ptr; - - dev_dbg(inf->dev, "%s: result %08lx, %p - %u, %zd\n", - __func__, mem->sm_addr, mem->k_addr, why, size); - - return 0; -} - -/* sm501fb_ps_to_hz - * - * Converts a period in picoseconds to Hz. - * - * Note, we try to keep this in Hz to minimise rounding with - * the limited PLL settings on the SM501. -*/ - -static unsigned long sm501fb_ps_to_hz(unsigned long psvalue) -{ - unsigned long long numerator=1000000000000ULL; - - /* 10^12 / picosecond period gives frequency in Hz */ - do_div(numerator, psvalue); - return (unsigned long)numerator; -} - -/* sm501fb_hz_to_ps is identical to the oposite transform */ - -#define sm501fb_hz_to_ps(x) sm501fb_ps_to_hz(x) - -/* sm501fb_setup_gamma - * - * Programs a linear 1.0 gamma ramp in case the gamma - * correction is enabled without programming anything else. -*/ - -static void sm501fb_setup_gamma(struct sm501fb_info *fbi, - unsigned long palette) -{ - unsigned long value = 0; - int offset; - - /* set gamma values */ - for (offset = 0; offset < 256 * 4; offset += 4) { - writel(value, fbi->regs + palette + offset); - value += 0x010101; /* Advance RGB by 1,1,1.*/ - } -} - -/* sm501fb_check_var - * - * check common variables for both panel and crt -*/ - -static int sm501fb_check_var(struct fb_var_screeninfo *var, - struct fb_info *info) -{ - struct sm501fb_par *par = info->par; - struct sm501fb_info *sm = par->info; - unsigned long tmp; - - /* check we can fit these values into the registers */ - - if (var->hsync_len > 255 || var->vsync_len > 63) - return -EINVAL; - - /* hdisplay end and hsync start */ - if ((var->xres + var->right_margin) > 4096) - return -EINVAL; - - /* vdisplay end and vsync start */ - if ((var->yres + var->lower_margin) > 2048) - return -EINVAL; - - /* hard limits of device */ - - if (h_total(var) > 4096 || v_total(var) > 2048) - return -EINVAL; - - /* check our line length is going to be 128 bit aligned */ - - tmp = (var->xres * var->bits_per_pixel) / 8; - if ((tmp & 15) != 0) - return -EINVAL; - - /* check the virtual size */ - - if (var->xres_virtual > 4096 || var->yres_virtual > 2048) - return -EINVAL; - - /* can cope with 8,16 or 32bpp */ - - if (var->bits_per_pixel <= 8) - var->bits_per_pixel = 8; - else if (var->bits_per_pixel <= 16) - var->bits_per_pixel = 16; - else if (var->bits_per_pixel == 24) - var->bits_per_pixel = 32; - - /* set r/g/b positions and validate bpp */ - switch(var->bits_per_pixel) { - case 8: - var->red.length = var->bits_per_pixel; - var->red.offset = 0; - var->green.length = var->bits_per_pixel; - var->green.offset = 0; - var->blue.length = var->bits_per_pixel; - var->blue.offset = 0; - var->transp.length = 0; - var->transp.offset = 0; - - break; - - case 16: - if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) { - var->blue.offset = 11; - var->green.offset = 5; - var->red.offset = 0; - } else { - var->red.offset = 11; - var->green.offset = 5; - var->blue.offset = 0; - } - var->transp.offset = 0; - - var->red.length = 5; - var->green.length = 6; - var->blue.length = 5; - var->transp.length = 0; - break; - - case 32: - if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) { - var->transp.offset = 0; - var->red.offset = 8; - var->green.offset = 16; - var->blue.offset = 24; - } else { - var->transp.offset = 24; - var->red.offset = 16; - var->green.offset = 8; - var->blue.offset = 0; - } - - var->red.length = 8; - var->green.length = 8; - var->blue.length = 8; - var->transp.length = 0; - break; - - default: - return -EINVAL; - } - - return 0; -} - -/* - * sm501fb_check_var_crt(): - * - * check the parameters for the CRT head, and either bring them - * back into range, or return -EINVAL. -*/ - -static int sm501fb_check_var_crt(struct fb_var_screeninfo *var, - struct fb_info *info) -{ - return sm501fb_check_var(var, info); -} - -/* sm501fb_check_var_pnl(): - * - * check the parameters for the CRT head, and either bring them - * back into range, or return -EINVAL. -*/ - -static int sm501fb_check_var_pnl(struct fb_var_screeninfo *var, - struct fb_info *info) -{ - return sm501fb_check_var(var, info); -} - -/* sm501fb_set_par_common - * - * set common registers for framebuffers -*/ - -static int sm501fb_set_par_common(struct fb_info *info, - struct fb_var_screeninfo *var) -{ - struct sm501fb_par *par = info->par; - struct sm501fb_info *fbi = par->info; - unsigned long pixclock; /* pixelclock in Hz */ - unsigned long sm501pixclock; /* pixelclock the 501 can achive in Hz */ - unsigned int mem_type; - unsigned int clock_type; - unsigned int head_addr; - - dev_dbg(fbi->dev, "%s: %dx%d, bpp = %d, virtual %dx%d\n", - __func__, var->xres, var->yres, var->bits_per_pixel, - var->xres_virtual, var->yres_virtual); - - switch (par->head) { - case HEAD_CRT: - mem_type = SM501_MEMF_CRT; - clock_type = SM501_CLOCK_V2XCLK; - head_addr = SM501_DC_CRT_FB_ADDR; - break; - - case HEAD_PANEL: - mem_type = SM501_MEMF_PANEL; - clock_type = SM501_CLOCK_P2XCLK; - head_addr = SM501_DC_PANEL_FB_ADDR; - break; - - default: - mem_type = 0; /* stop compiler warnings */ - head_addr = 0; - clock_type = 0; - } - - switch (var->bits_per_pixel) { - case 8: - info->fix.visual = FB_VISUAL_PSEUDOCOLOR; - break; - - case 16: - info->fix.visual = FB_VISUAL_TRUECOLOR; - break; - - case 32: - info->fix.visual = FB_VISUAL_TRUECOLOR; - break; - } - - /* allocate fb memory within 501 */ - info->fix.line_length = (var->xres_virtual * var->bits_per_pixel)/8; - info->fix.smem_len = info->fix.line_length * var->yres_virtual; - - dev_dbg(fbi->dev, "%s: line length = %u\n", __func__, - info->fix.line_length); - - if (sm501_alloc_mem(fbi, &par->screen, mem_type, - info->fix.smem_len)) { - dev_err(fbi->dev, "no memory available\n"); - return -ENOMEM; - } - - info->fix.smem_start = fbi->fbmem_res->start + par->screen.sm_addr; - - info->screen_base = fbi->fbmem + par->screen.sm_addr; - info->screen_size = info->fix.smem_len; - - /* set start of framebuffer to the screen */ - - writel(par->screen.sm_addr | SM501_ADDR_FLIP, fbi->regs + head_addr); - - /* program CRT clock */ - - pixclock = sm501fb_ps_to_hz(var->pixclock); - - sm501pixclock = sm501_set_clock(fbi->dev->parent, clock_type, - pixclock); - - /* update fb layer with actual clock used */ - var->pixclock = sm501fb_hz_to_ps(sm501pixclock); - - dev_dbg(fbi->dev, "%s: pixclock(ps) = %u, pixclock(Hz) = %lu, " - "sm501pixclock = %lu, error = %ld%%\n", - __func__, var->pixclock, pixclock, sm501pixclock, - ((pixclock - sm501pixclock)*100)/pixclock); - - return 0; -} - -/* sm501fb_set_par_geometry - * - * set the geometry registers for specified framebuffer. -*/ - -static void sm501fb_set_par_geometry(struct fb_info *info, - struct fb_var_screeninfo *var) -{ - struct sm501fb_par *par = info->par; - struct sm501fb_info *fbi = par->info; - void __iomem *base = fbi->regs; - unsigned long reg; - - if (par->head == HEAD_CRT) - base += SM501_DC_CRT_H_TOT; - else - base += SM501_DC_PANEL_H_TOT; - - /* set framebuffer width and display width */ - - reg = info->fix.line_length; - reg |= ((var->xres * var->bits_per_pixel)/8) << 16; - - writel(reg, fbi->regs + (par->head == HEAD_CRT ? - SM501_DC_CRT_FB_OFFSET : SM501_DC_PANEL_FB_OFFSET)); - - /* program horizontal total */ - - reg = (h_total(var) - 1) << 16; - reg |= (var->xres - 1); - - writel(reg, base + SM501_OFF_DC_H_TOT); - - /* program horizontal sync */ - - reg = var->hsync_len << 16; - reg |= var->xres + var->right_margin - 1; - - writel(reg, base + SM501_OFF_DC_H_SYNC); - - /* program vertical total */ - - reg = (v_total(var) - 1) << 16; - reg |= (var->yres - 1); - - writel(reg, base + SM501_OFF_DC_V_TOT); - - /* program vertical sync */ - reg = var->vsync_len << 16; - reg |= var->yres + var->lower_margin - 1; - - writel(reg, base + SM501_OFF_DC_V_SYNC); -} - -/* sm501fb_pan_crt - * - * pan the CRT display output within an virtual framebuffer -*/ - -static int sm501fb_pan_crt(struct fb_var_screeninfo *var, - struct fb_info *info) -{ - struct sm501fb_par *par = info->par; - struct sm501fb_info *fbi = par->info; - unsigned int bytes_pixel = var->bits_per_pixel / 8; - unsigned long reg; - unsigned long xoffs; - - xoffs = var->xoffset * bytes_pixel; - - reg = readl(fbi->regs + SM501_DC_CRT_CONTROL); - - reg &= ~SM501_DC_CRT_CONTROL_PIXEL_MASK; - reg |= ((xoffs & 15) / bytes_pixel) << 4; - writel(reg, fbi->regs + SM501_DC_CRT_CONTROL); - - reg = (par->screen.sm_addr + xoffs + - var->yoffset * info->fix.line_length); - writel(reg | SM501_ADDR_FLIP, fbi->regs + SM501_DC_CRT_FB_ADDR); - - sm501fb_sync_regs(fbi); - return 0; -} - -/* sm501fb_pan_pnl - * - * pan the panel display output within an virtual framebuffer -*/ - -static int sm501fb_pan_pnl(struct fb_var_screeninfo *var, - struct fb_info *info) -{ - struct sm501fb_par *par = info->par; - struct sm501fb_info *fbi = par->info; - unsigned long reg; - - reg = var->xoffset | (var->xres_virtual << 16); - writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH); - - reg = var->yoffset | (var->yres_virtual << 16); - writel(reg, fbi->regs + SM501_DC_PANEL_FB_HEIGHT); - - sm501fb_sync_regs(fbi); - return 0; -} - -/* sm501fb_set_par_crt - * - * Set the CRT video mode from the fb_info structure -*/ - -static int sm501fb_set_par_crt(struct fb_info *info) -{ - struct sm501fb_par *par = info->par; - struct sm501fb_info *fbi = par->info; - struct fb_var_screeninfo *var = &info->var; - unsigned long control; /* control register */ - int ret; - - /* activate new configuration */ - - dev_dbg(fbi->dev, "%s(%p)\n", __func__, info); - - /* enable CRT DAC - note 0 is on!*/ - sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER); - - control = readl(fbi->regs + SM501_DC_CRT_CONTROL); - - control &= (SM501_DC_CRT_CONTROL_PIXEL_MASK | - SM501_DC_CRT_CONTROL_GAMMA | - SM501_DC_CRT_CONTROL_BLANK | - SM501_DC_CRT_CONTROL_SEL | - SM501_DC_CRT_CONTROL_CP | - SM501_DC_CRT_CONTROL_TVP); - - /* set the sync polarities before we check data source */ - - if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0) - control |= SM501_DC_CRT_CONTROL_HSP; - - if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0) - control |= SM501_DC_CRT_CONTROL_VSP; - - if ((control & SM501_DC_CRT_CONTROL_SEL) == 0) { - /* the head is displaying panel data... */ - - sm501_alloc_mem(fbi, &par->screen, SM501_MEMF_CRT, 0); - goto out_update; - } - - ret = sm501fb_set_par_common(info, var); - if (ret) { - dev_err(fbi->dev, "failed to set common parameters\n"); - return ret; - } - - sm501fb_pan_crt(var, info); - sm501fb_set_par_geometry(info, var); - - control |= SM501_FIFO_3; /* fill if >3 free slots */ - - switch(var->bits_per_pixel) { - case 8: - control |= SM501_DC_CRT_CONTROL_8BPP; - break; - - case 16: - control |= SM501_DC_CRT_CONTROL_16BPP; - sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE); - break; - - case 32: - control |= SM501_DC_CRT_CONTROL_32BPP; - sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE); - break; - - default: - BUG(); - } - - control |= SM501_DC_CRT_CONTROL_SEL; /* CRT displays CRT data */ - control |= SM501_DC_CRT_CONTROL_TE; /* enable CRT timing */ - control |= SM501_DC_CRT_CONTROL_ENABLE; /* enable CRT plane */ - - out_update: - dev_dbg(fbi->dev, "new control is %08lx\n", control); - - writel(control, fbi->regs + SM501_DC_CRT_CONTROL); - sm501fb_sync_regs(fbi); - - return 0; -} - -static void sm501fb_panel_power(struct sm501fb_info *fbi, int to) -{ - unsigned long control; - void __iomem *ctrl_reg = fbi->regs + SM501_DC_PANEL_CONTROL; - struct sm501_platdata_fbsub *pd = fbi->pdata->fb_pnl; - - control = readl(ctrl_reg); - - if (to && (control & SM501_DC_PANEL_CONTROL_VDD) == 0) { - /* enable panel power */ - - control |= SM501_DC_PANEL_CONTROL_VDD; /* FPVDDEN */ - writel(control, ctrl_reg); - sm501fb_sync_regs(fbi); - mdelay(10); - - control |= SM501_DC_PANEL_CONTROL_DATA; /* DATA */ - writel(control, ctrl_reg); - sm501fb_sync_regs(fbi); - mdelay(10); - - if (pd->flags & SM501FB_FLAG_PANEL_USE_VBIASEN) { - control |= SM501_DC_PANEL_CONTROL_BIAS; /* VBIASEN */ - writel(control, ctrl_reg); - sm501fb_sync_regs(fbi); - mdelay(10); - } - - if (pd->flags & SM501FB_FLAG_PANEL_USE_FPEN) { - control |= SM501_DC_PANEL_CONTROL_FPEN; - writel(control, ctrl_reg); - sm501fb_sync_regs(fbi); - mdelay(10); - } - } else if (!to && (control & SM501_DC_PANEL_CONTROL_VDD) != 0) { - /* disable panel power */ - if (pd->flags & SM501FB_FLAG_PANEL_USE_FPEN) { - control &= ~SM501_DC_PANEL_CONTROL_FPEN; - writel(control, ctrl_reg); - sm501fb_sync_regs(fbi); - mdelay(10); - } - - if (pd->flags & SM501FB_FLAG_PANEL_USE_VBIASEN) { - control &= ~SM501_DC_PANEL_CONTROL_BIAS; - writel(control, ctrl_reg); - sm501fb_sync_regs(fbi); - mdelay(10); - } - - control &= ~SM501_DC_PANEL_CONTROL_DATA; - writel(control, ctrl_reg); - sm501fb_sync_regs(fbi); - mdelay(10); - - control &= ~SM501_DC_PANEL_CONTROL_VDD; - writel(control, ctrl_reg); - sm501fb_sync_regs(fbi); - mdelay(10); - } - - sm501fb_sync_regs(fbi); -} - -/* sm501fb_set_par_pnl - * - * Set the panel video mode from the fb_info structure -*/ - -static int sm501fb_set_par_pnl(struct fb_info *info) -{ - struct sm501fb_par *par = info->par; - struct sm501fb_info *fbi = par->info; - struct fb_var_screeninfo *var = &info->var; - unsigned long control; - unsigned long reg; - int ret; - - dev_dbg(fbi->dev, "%s(%p)\n", __func__, info); - - /* activate this new configuration */ - - ret = sm501fb_set_par_common(info, var); - if (ret) - return ret; - - sm501fb_pan_pnl(var, info); - sm501fb_set_par_geometry(info, var); - - /* update control register */ - - control = readl(fbi->regs + SM501_DC_PANEL_CONTROL); - control &= (SM501_DC_PANEL_CONTROL_GAMMA | - SM501_DC_PANEL_CONTROL_VDD | - SM501_DC_PANEL_CONTROL_DATA | - SM501_DC_PANEL_CONTROL_BIAS | - SM501_DC_PANEL_CONTROL_FPEN | - SM501_DC_PANEL_CONTROL_CP | - SM501_DC_PANEL_CONTROL_CK | - SM501_DC_PANEL_CONTROL_HP | - SM501_DC_PANEL_CONTROL_VP | - SM501_DC_PANEL_CONTROL_HPD | - SM501_DC_PANEL_CONTROL_VPD); - - control |= SM501_FIFO_3; /* fill if >3 free slots */ - - switch(var->bits_per_pixel) { - case 8: - control |= SM501_DC_PANEL_CONTROL_8BPP; - break; - - case 16: - control |= SM501_DC_PANEL_CONTROL_16BPP; - sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE); - break; - - case 32: - control |= SM501_DC_PANEL_CONTROL_32BPP; - sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE); - break; - - default: - BUG(); - } - - writel(0x0, fbi->regs + SM501_DC_PANEL_PANNING_CONTROL); - - /* panel plane top left and bottom right location */ - - writel(0x00, fbi->regs + SM501_DC_PANEL_TL_LOC); - - reg = var->xres - 1; - reg |= (var->yres - 1) << 16; - - writel(reg, fbi->regs + SM501_DC_PANEL_BR_LOC); - - /* program panel control register */ - - control |= SM501_DC_PANEL_CONTROL_TE; /* enable PANEL timing */ - control |= SM501_DC_PANEL_CONTROL_EN; /* enable PANEL gfx plane */ - - if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0) - control |= SM501_DC_PANEL_CONTROL_HSP; - - if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0) - control |= SM501_DC_PANEL_CONTROL_VSP; - - writel(control, fbi->regs + SM501_DC_PANEL_CONTROL); - sm501fb_sync_regs(fbi); - - /* ensure the panel interface is not tristated at this point */ - - sm501_modify_reg(fbi->dev->parent, SM501_SYSTEM_CONTROL, - 0, SM501_SYSCTRL_PANEL_TRISTATE); - - /* power the panel up */ - sm501fb_panel_power(fbi, 1); - return 0; -} - - -/* chan_to_field - * - * convert a colour value into a field position - * - * from pxafb.c -*/ - -static inline unsigned int chan_to_field(unsigned int chan, - struct fb_bitfield *bf) -{ - chan &= 0xffff; - chan >>= 16 - bf->length; - return chan << bf->offset; -} - -/* sm501fb_setcolreg - * - * set the colour mapping for modes that support palettised data -*/ - -static int sm501fb_setcolreg(unsigned regno, - unsigned red, unsigned green, unsigned blue, - unsigned transp, struct fb_info *info) -{ - struct sm501fb_par *par = info->par; - struct sm501fb_info *fbi = par->info; - void __iomem *base = fbi->regs; - unsigned int val; - - if (par->head == HEAD_CRT) - base += SM501_DC_CRT_PALETTE; - else - base += SM501_DC_PANEL_PALETTE; - - switch (info->fix.visual) { - case FB_VISUAL_TRUECOLOR: - /* true-colour, use pseuo-palette */ - - if (regno < 16) { - u32 *pal = par->pseudo_palette; - - val = chan_to_field(red, &info->var.red); - val |= chan_to_field(green, &info->var.green); - val |= chan_to_field(blue, &info->var.blue); - - pal[regno] = val; - } - break; - - case FB_VISUAL_PSEUDOCOLOR: - if (regno < 256) { - val = (red >> 8) << 16; - val |= (green >> 8) << 8; - val |= blue >> 8; - - writel(val, base + (regno * 4)); - } - - break; - - default: - return 1; /* unknown type */ - } - - return 0; -} - -/* sm501fb_blank_pnl - * - * Blank or un-blank the panel interface -*/ - -static int sm501fb_blank_pnl(int blank_mode, struct fb_info *info) -{ - struct sm501fb_par *par = info->par; - struct sm501fb_info *fbi = par->info; - - dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info); - - switch (blank_mode) { - case FB_BLANK_POWERDOWN: - sm501fb_panel_power(fbi, 0); - break; - - case FB_BLANK_UNBLANK: - sm501fb_panel_power(fbi, 1); - break; - - case FB_BLANK_NORMAL: - case FB_BLANK_VSYNC_SUSPEND: - case FB_BLANK_HSYNC_SUSPEND: - default: - return 1; - } - - return 0; -} - -/* sm501fb_blank_crt - * - * Blank or un-blank the crt interface -*/ - -static int sm501fb_blank_crt(int blank_mode, struct fb_info *info) -{ - struct sm501fb_par *par = info->par; - struct sm501fb_info *fbi = par->info; - unsigned long ctrl; - - dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info); - - ctrl = readl(fbi->regs + SM501_DC_CRT_CONTROL); - - switch (blank_mode) { - case FB_BLANK_POWERDOWN: - ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE; - sm501_misc_control(fbi->dev->parent, SM501_MISC_DAC_POWER, 0); - - case FB_BLANK_NORMAL: - ctrl |= SM501_DC_CRT_CONTROL_BLANK; - break; - - case FB_BLANK_UNBLANK: - ctrl &= ~SM501_DC_CRT_CONTROL_BLANK; - ctrl |= SM501_DC_CRT_CONTROL_ENABLE; - sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER); - break; - - case FB_BLANK_VSYNC_SUSPEND: - case FB_BLANK_HSYNC_SUSPEND: - default: - return 1; - - } - - writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL); - sm501fb_sync_regs(fbi); - - return 0; -} - -/* sm501fb_cursor - * - * set or change the hardware cursor parameters -*/ - -static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor) -{ - struct sm501fb_par *par = info->par; - struct sm501fb_info *fbi = par->info; - void __iomem *base = fbi->regs; - unsigned long hwc_addr; - unsigned long fg, bg; - - dev_dbg(fbi->dev, "%s(%p,%p)\n", __func__, info, cursor); - - if (par->head == HEAD_CRT) - base += SM501_DC_CRT_HWC_BASE; - else - base += SM501_DC_PANEL_HWC_BASE; - - /* check not being asked to exceed capabilities */ - - if (cursor->image.width > 64) - return -EINVAL; - - if (cursor->image.height > 64) - return -EINVAL; - - if (cursor->image.depth > 1) - return -EINVAL; - - hwc_addr = readl(base + SM501_OFF_HWC_ADDR); - - if (cursor->enable) - writel(hwc_addr | SM501_HWC_EN, base + SM501_OFF_HWC_ADDR); - else - writel(hwc_addr & ~SM501_HWC_EN, base + SM501_OFF_HWC_ADDR); - - /* set data */ - if (cursor->set & FB_CUR_SETPOS) { - unsigned int x = cursor->image.dx; - unsigned int y = cursor->image.dy; - - if (x >= 2048 || y >= 2048 ) - return -EINVAL; - - dev_dbg(fbi->dev, "set position %d,%d\n", x, y); - - //y += cursor->image.height; - - writel(x | (y << 16), base + SM501_OFF_HWC_LOC); - } - - if (cursor->set & FB_CUR_SETCMAP) { - unsigned int bg_col = cursor->image.bg_color; - unsigned int fg_col = cursor->image.fg_color; - - dev_dbg(fbi->dev, "%s: update cmap (%08x,%08x)\n", - __func__, bg_col, fg_col); - - bg = ((info->cmap.red[bg_col] & 0xF8) << 8) | - ((info->cmap.green[bg_col] & 0xFC) << 3) | - ((info->cmap.blue[bg_col] & 0xF8) >> 3); - - fg = ((info->cmap.red[fg_col] & 0xF8) << 8) | - ((info->cmap.green[fg_col] & 0xFC) << 3) | - ((info->cmap.blue[fg_col] & 0xF8) >> 3); - - dev_dbg(fbi->dev, "fgcol %08lx, bgcol %08lx\n", fg, bg); - - writel(bg, base + SM501_OFF_HWC_COLOR_1_2); - writel(fg, base + SM501_OFF_HWC_COLOR_3); - } - - if (cursor->set & FB_CUR_SETSIZE || - cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE)) { - /* SM501 cursor is a two bpp 64x64 bitmap this routine - * clears it to transparent then combines the cursor - * shape plane with the colour plane to set the - * cursor */ - int x, y; - const unsigned char *pcol = cursor->image.data; - const unsigned char *pmsk = cursor->mask; - void __iomem *dst = par->cursor.k_addr; - unsigned char dcol = 0; - unsigned char dmsk = 0; - unsigned int op; - - dev_dbg(fbi->dev, "%s: setting shape (%d,%d)\n", - __func__, cursor->image.width, cursor->image.height); - - for (op = 0; op < (64*64*2)/8; op+=4) - writel(0x0, dst + op); - - for (y = 0; y < cursor->image.height; y++) { - for (x = 0; x < cursor->image.width; x++) { - if ((x % 8) == 0) { - dcol = *pcol++; - dmsk = *pmsk++; - } else { - dcol >>= 1; - dmsk >>= 1; - } - - if (dmsk & 1) { - op = (dcol & 1) ? 1 : 3; - op <<= ((x % 4) * 2); - - op |= readb(dst + (x / 4)); - writeb(op, dst + (x / 4)); - } - } - dst += (64*2)/8; - } - } - - sm501fb_sync_regs(fbi); /* ensure cursor data flushed */ - return 0; -} - -/* sm501fb_crtsrc_show - * - * device attribute code to show where the crt output is sourced from -*/ - -static ssize_t sm501fb_crtsrc_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct sm501fb_info *info = dev_get_drvdata(dev); - unsigned long ctrl; - - ctrl = readl(info->regs + SM501_DC_CRT_CONTROL); - ctrl &= SM501_DC_CRT_CONTROL_SEL; - - return snprintf(buf, PAGE_SIZE, "%s\n", ctrl ? "crt" : "panel"); -} - -/* sm501fb_crtsrc_show - * - * device attribute code to set where the crt output is sourced from -*/ - -static ssize_t sm501fb_crtsrc_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) -{ - struct sm501fb_info *info = dev_get_drvdata(dev); - enum sm501_controller head; - unsigned long ctrl; - - if (len < 1) - return -EINVAL; - - if (strnicmp(buf, "crt", 3) == 0) - head = HEAD_CRT; - else if (strnicmp(buf, "panel", 5) == 0) - head = HEAD_PANEL; - else - return -EINVAL; - - dev_info(dev, "setting crt source to head %d\n", head); - - ctrl = readl(info->regs + SM501_DC_CRT_CONTROL); - - if (head == HEAD_CRT) { - ctrl |= SM501_DC_CRT_CONTROL_SEL; - ctrl |= SM501_DC_CRT_CONTROL_ENABLE; - ctrl |= SM501_DC_CRT_CONTROL_TE; - } else { - ctrl &= ~SM501_DC_CRT_CONTROL_SEL; - ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE; - ctrl &= ~SM501_DC_CRT_CONTROL_TE; - } - - writel(ctrl, info->regs + SM501_DC_CRT_CONTROL); - sm501fb_sync_regs(info); - - return len; -} - -/* Prepare the device_attr for registration with sysfs later */ -static DEVICE_ATTR(crt_src, 0666, sm501fb_crtsrc_show, sm501fb_crtsrc_store); - -/* sm501fb_show_regs - * - * show the primary sm501 registers -*/ -static int sm501fb_show_regs(struct sm501fb_info *info, char *ptr, - unsigned int start, unsigned int len) -{ - void __iomem *mem = info->regs; - char *buf = ptr; - unsigned int reg; - - for (reg = start; reg < (len + start); reg += 4) - ptr += sprintf(ptr, "%08x = %08x\n", reg, readl(mem + reg)); - - return ptr - buf; -} - -/* sm501fb_debug_show_crt - * - * show the crt control and cursor registers -*/ - -static ssize_t sm501fb_debug_show_crt(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct sm501fb_info *info = dev_get_drvdata(dev); - char *ptr = buf; - - ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_CONTROL, 0x40); - ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_HWC_BASE, 0x10); - - return ptr - buf; -} - -static DEVICE_ATTR(fbregs_crt, 0444, sm501fb_debug_show_crt, NULL); - -/* sm501fb_debug_show_pnl - * - * show the panel control and cursor registers -*/ - -static ssize_t sm501fb_debug_show_pnl(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct sm501fb_info *info = dev_get_drvdata(dev); - char *ptr = buf; - - ptr += sm501fb_show_regs(info, ptr, 0x0, 0x40); - ptr += sm501fb_show_regs(info, ptr, SM501_DC_PANEL_HWC_BASE, 0x10); - - return ptr - buf; -} - -static DEVICE_ATTR(fbregs_pnl, 0444, sm501fb_debug_show_pnl, NULL); - -/* framebuffer ops */ - -static struct fb_ops sm501fb_ops_crt = { - .owner = THIS_MODULE, - .fb_check_var = sm501fb_check_var_crt, - .fb_set_par = sm501fb_set_par_crt, - .fb_blank = sm501fb_blank_crt, - .fb_setcolreg = sm501fb_setcolreg, - .fb_pan_display = sm501fb_pan_crt, - .fb_cursor = sm501fb_cursor, - .fb_fillrect = cfb_fillrect, - .fb_copyarea = cfb_copyarea, - .fb_imageblit = cfb_imageblit, -}; - -static struct fb_ops sm501fb_ops_pnl = { - .owner = THIS_MODULE, - .fb_check_var = sm501fb_check_var_pnl, - .fb_set_par = sm501fb_set_par_pnl, - .fb_pan_display = sm501fb_pan_pnl, - .fb_blank = sm501fb_blank_pnl, - .fb_setcolreg = sm501fb_setcolreg, - .fb_cursor = sm501fb_cursor, - .fb_fillrect = cfb_fillrect, - .fb_copyarea = cfb_copyarea, - .fb_imageblit = cfb_imageblit, -}; - -/* sm501fb_info_alloc - * - * creates and initialises an sm501fb_info structure -*/ - -static struct sm501fb_info *sm501fb_info_alloc(struct fb_info *fbinfo_crt, - struct fb_info *fbinfo_pnl) -{ - struct sm501fb_info *info; - struct sm501fb_par *par; - - info = kzalloc(sizeof(struct sm501fb_info), GFP_KERNEL); - if (info) { - /* set the references back */ - - par = fbinfo_crt->par; - par->info = info; - par->head = HEAD_CRT; - fbinfo_crt->pseudo_palette = &par->pseudo_palette; - - par = fbinfo_pnl->par; - par->info = info; - par->head = HEAD_PANEL; - fbinfo_pnl->pseudo_palette = &par->pseudo_palette; - - /* store the two fbs into our info */ - info->fb[HEAD_CRT] = fbinfo_crt; - info->fb[HEAD_PANEL] = fbinfo_pnl; - } - - return info; -} - -/* sm501_init_cursor - * - * initialise hw cursor parameters -*/ - -static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base) -{ - struct sm501fb_par *par = fbi->par; - struct sm501fb_info *info = par->info; - int ret; - - par->cursor_regs = info->regs + reg_base; - - ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024); - if (ret < 0) - return ret; - - /* initialise the colour registers */ - - writel(par->cursor.sm_addr, par->cursor_regs + SM501_OFF_HWC_ADDR); - - writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC); - writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2); - writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3); - sm501fb_sync_regs(info); - - return 0; -} - -/* sm501fb_info_start - * - * fills the par structure claiming resources and remapping etc. -*/ - -static int sm501fb_start(struct sm501fb_info *info, - struct platform_device *pdev) -{ - struct resource *res; - struct device *dev; - int k; - int ret; - - info->dev = dev = &pdev->dev; - platform_set_drvdata(pdev, info); - - info->irq = ret = platform_get_irq(pdev, 0); - if (ret < 0) { - /* we currently do not use the IRQ */ - dev_warn(dev, "no irq for device\n"); - } - - /* allocate, reserve and remap resources for registers */ - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res == NULL) { - dev_err(dev, "no resource definition for registers\n"); - ret = -ENOENT; - goto err_release; - } - - info->regs_res = request_mem_region(res->start, - res->end - res->start, - pdev->name); - - if (info->regs_res == NULL) { - dev_err(dev, "cannot claim registers\n"); - ret = -ENXIO; - goto err_release; - } - - info->regs = ioremap(res->start, (res->end - res->start)+1); - if (info->regs == NULL) { - dev_err(dev, "cannot remap registers\n"); - ret = -ENXIO; - goto err_regs_res; - } - - /* allocate, reserve resources for framebuffer */ - res = platform_get_resource(pdev, IORESOURCE_MEM, 2); - if (res == NULL) { - dev_err(dev, "no memory resource defined\n"); - ret = -ENXIO; - goto err_regs_map; - } - - info->fbmem_res = request_mem_region(res->start, - (res->end - res->start)+1, - pdev->name); - if (info->fbmem_res == NULL) { - dev_err(dev, "cannot claim framebuffer\n"); - ret = -ENXIO; - goto err_regs_map; - } - - info->fbmem = ioremap(res->start, (res->end - res->start)+1); - if (info->fbmem == NULL) { - dev_err(dev, "cannot remap framebuffer\n"); - goto err_mem_res; - } - - info->fbmem_len = (res->end - res->start)+1; - - /* clear framebuffer memory - avoids garbage data on unused fb */ - memset(info->fbmem, 0, info->fbmem_len); - - /* clear palette ram - undefined at power on */ - for (k = 0; k < (256 * 3); k++) - writel(0, info->regs + SM501_DC_PANEL_PALETTE + (k * 4)); - - /* enable display controller */ - sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1); - - /* setup cursors */ - - sm501_init_cursor(info->fb[HEAD_CRT], SM501_DC_CRT_HWC_ADDR); - sm501_init_cursor(info->fb[HEAD_PANEL], SM501_DC_PANEL_HWC_ADDR); - - return 0; /* everything is setup */ - - err_mem_res: - release_resource(info->fbmem_res); - kfree(info->fbmem_res); - - err_regs_map: - iounmap(info->regs); - - err_regs_res: - release_resource(info->regs_res); - kfree(info->regs_res); - - err_release: - return ret; -} - -static void sm501fb_stop(struct sm501fb_info *info) -{ - /* disable display controller */ - sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0); - - iounmap(info->fbmem); - release_resource(info->fbmem_res); - kfree(info->fbmem_res); - - iounmap(info->regs); - release_resource(info->regs_res); - kfree(info->regs_res); -} - -static void sm501fb_info_release(struct sm501fb_info *info) -{ - kfree(info); -} - -static int sm501fb_init_fb(struct fb_info *fb, - enum sm501_controller head, - const char *fbname) -{ - struct sm501_platdata_fbsub *pd; - struct sm501fb_par *par = fb->par; - struct sm501fb_info *info = par->info; - unsigned long ctrl; - unsigned int enable; - int ret; - - switch (head) { - case HEAD_CRT: - pd = info->pdata->fb_crt; - ctrl = readl(info->regs + SM501_DC_CRT_CONTROL); - enable = (ctrl & SM501_DC_CRT_CONTROL_ENABLE) ? 1 : 0; - - /* ensure we set the correct source register */ - if (info->pdata->fb_route != SM501_FB_CRT_PANEL) { - ctrl |= SM501_DC_CRT_CONTROL_SEL; - writel(ctrl, info->regs + SM501_DC_CRT_CONTROL); - } - - break; - - case HEAD_PANEL: - pd = info->pdata->fb_pnl; - ctrl = readl(info->regs + SM501_DC_PANEL_CONTROL); - enable = (ctrl & SM501_DC_PANEL_CONTROL_EN) ? 1 : 0; - break; - - default: - pd = NULL; /* stop compiler warnings */ - ctrl = 0; - enable = 0; - BUG(); - } - - dev_info(info->dev, "fb %s %sabled at start\n", - fbname, enable ? "en" : "dis"); - - /* check to see if our routing allows this */ - - if (head == HEAD_CRT && info->pdata->fb_route == SM501_FB_CRT_PANEL) { - ctrl &= ~SM501_DC_CRT_CONTROL_SEL; - writel(ctrl, info->regs + SM501_DC_CRT_CONTROL); - enable = 0; - } - - strlcpy(fb->fix.id, fbname, sizeof(fb->fix.id)); - - memcpy(&par->ops, - (head == HEAD_CRT) ? &sm501fb_ops_crt : &sm501fb_ops_pnl, - sizeof(struct fb_ops)); - - /* update ops dependant on what we've been passed */ - - if ((pd->flags & SM501FB_FLAG_USE_HWCURSOR) == 0) - par->ops.fb_cursor = NULL; - - fb->fbops = &par->ops; - fb->flags = FBINFO_FLAG_DEFAULT | - FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN; - - /* fixed data */ - - fb->fix.type = FB_TYPE_PACKED_PIXELS; - fb->fix.type_aux = 0; - fb->fix.xpanstep = 1; - fb->fix.ypanstep = 1; - fb->fix.ywrapstep = 0; - fb->fix.accel = FB_ACCEL_NONE; - - /* screenmode */ - - fb->var.nonstd = 0; - fb->var.activate = FB_ACTIVATE_NOW; - fb->var.accel_flags = 0; - fb->var.vmode = FB_VMODE_NONINTERLACED; - fb->var.bits_per_pixel = 16; - - if (enable && (pd->flags & SM501FB_FLAG_USE_INIT_MODE) && 0) { - /* TODO read the mode from the current display */ - - } else { - if (pd->def_mode) { - dev_info(info->dev, "using supplied mode\n"); - fb_videomode_to_var(&fb->var, pd->def_mode); - - fb->var.bits_per_pixel = pd->def_bpp ? pd->def_bpp : 8; - fb->var.xres_virtual = fb->var.xres; - fb->var.yres_virtual = fb->var.yres; - } else { - ret = fb_find_mode(&fb->var, fb, - NULL, NULL, 0, NULL, 8); - - if (ret == 0 || ret == 4) { - dev_err(info->dev, - "failed to get initial mode\n"); - return -EINVAL; - } - } - } - - /* initialise and set the palette */ - fb_alloc_cmap(&fb->cmap, NR_PALETTE, 0); - fb_set_cmap(&fb->cmap, fb); - - ret = (fb->fbops->fb_check_var)(&fb->var, fb); - if (ret) - dev_err(info->dev, "check_var() failed on initial setup?\n"); - - /* ensure we've activated our new configuration */ - (fb->fbops->fb_set_par)(fb); - - return 0; -} - -/* default platform data if none is supplied (ie, PCI device) */ - -static struct sm501_platdata_fbsub sm501fb_pdata_crt = { - .flags = (SM501FB_FLAG_USE_INIT_MODE | - SM501FB_FLAG_USE_HWCURSOR | - SM501FB_FLAG_USE_HWACCEL | - SM501FB_FLAG_DISABLE_AT_EXIT), - -}; - -static struct sm501_platdata_fbsub sm501fb_pdata_pnl = { - .flags = (SM501FB_FLAG_USE_INIT_MODE | - SM501FB_FLAG_USE_HWCURSOR | - SM501FB_FLAG_USE_HWACCEL | - SM501FB_FLAG_DISABLE_AT_EXIT), -}; - -static struct sm501_platdata_fb sm501fb_def_pdata = { - .fb_route = SM501_FB_OWN, - .fb_crt = &sm501fb_pdata_crt, - .fb_pnl = &sm501fb_pdata_pnl, -}; - -static char driver_name_crt[] = "sm501fb-crt"; -static char driver_name_pnl[] = "sm501fb-panel"; - -static int __init sm501fb_probe(struct platform_device *pdev) -{ - struct sm501fb_info *info; - struct device *dev = &pdev->dev; - struct fb_info *fbinfo_crt; - struct fb_info *fbinfo_pnl; - int ret; - - /* allocate our framebuffers */ - - fbinfo_crt = framebuffer_alloc(sizeof(struct sm501fb_par), dev); - if (fbinfo_crt == NULL) { - dev_err(dev, "cannot allocate crt framebuffer\n"); - return -ENOMEM; - } - - fbinfo_pnl = framebuffer_alloc(sizeof(struct sm501fb_par), dev); - if (fbinfo_pnl == NULL) { - dev_err(dev, "cannot allocate panel framebuffer\n"); - ret = -ENOMEM; - goto fbinfo_crt_alloc_fail; - } - - info = sm501fb_info_alloc(fbinfo_crt, fbinfo_pnl); - if (info == NULL) { - dev_err(dev, "cannot allocate par\n"); - ret = -ENOMEM; - goto sm501fb_alloc_fail; - } - - if (dev->parent->platform_data) { - struct sm501_platdata *pd = dev->parent->platform_data; - info->pdata = pd->fb; - } - - if (info->pdata == NULL) { - dev_info(dev, "using default configuration data\n"); - info->pdata = &sm501fb_def_pdata; - } - - /* start the framebuffers */ - - ret = sm501fb_start(info, pdev); - if (ret) { - dev_err(dev, "cannot initialise SM501\n"); - goto sm501fb_start_fail; - } - - /* CRT framebuffer setup */ - - ret = sm501fb_init_fb(fbinfo_crt, HEAD_CRT, driver_name_crt); - if (ret) { - dev_err(dev, "cannot initialise CRT fb\n"); - goto sm501fb_start_fail; - } - - /* Panel framebuffer setup */ - - ret = sm501fb_init_fb(fbinfo_pnl, HEAD_PANEL, driver_name_pnl); - if (ret) { - dev_err(dev, "cannot initialise Panel fb\n"); - goto sm501fb_start_fail; - } - - /* register framebuffers */ - - ret = register_framebuffer(fbinfo_crt); - if (ret < 0) { - dev_err(dev, "failed to register CRT fb (%d)\n", ret); - goto register_crt_fail; - } - - ret = register_framebuffer(fbinfo_pnl); - if (ret < 0) { - dev_err(dev, "failed to register panel fb (%d)\n", ret); - goto register_pnl_fail; - } - - dev_info(dev, "fb%d: %s frame buffer device\n", - fbinfo_crt->node, fbinfo_crt->fix.id); - - dev_info(dev, "fb%d: %s frame buffer device\n", - fbinfo_pnl->node, fbinfo_pnl->fix.id); - - /* create device files */ - - ret = device_create_file(dev, &dev_attr_crt_src); - if (ret) - goto crtsrc_fail; - - ret = device_create_file(dev, &dev_attr_fbregs_pnl); - if (ret) - goto fbregs_pnl_fail; - - ret = device_create_file(dev, &dev_attr_fbregs_crt); - if (ret) - goto fbregs_crt_fail; - - /* we registered, return ok */ - return 0; - - fbregs_crt_fail: - device_remove_file(dev, &dev_attr_fbregs_pnl); - - fbregs_pnl_fail: - device_remove_file(dev, &dev_attr_crt_src); - - crtsrc_fail: - unregister_framebuffer(fbinfo_pnl); - - register_pnl_fail: - unregister_framebuffer(fbinfo_crt); - - register_crt_fail: - sm501fb_stop(info); - - sm501fb_start_fail: - sm501fb_info_release(info); - - sm501fb_alloc_fail: - framebuffer_release(fbinfo_pnl); - - fbinfo_crt_alloc_fail: - framebuffer_release(fbinfo_crt); - - return ret; -} - - -/* - * Cleanup - */ -static int sm501fb_remove(struct platform_device *pdev) -{ - struct sm501fb_info *info = platform_get_drvdata(pdev); - struct fb_info *fbinfo_crt = info->fb[0]; - struct fb_info *fbinfo_pnl = info->fb[1]; - - device_remove_file(&pdev->dev, &dev_attr_fbregs_crt); - device_remove_file(&pdev->dev, &dev_attr_fbregs_pnl); - device_remove_file(&pdev->dev, &dev_attr_crt_src); - - unregister_framebuffer(fbinfo_crt); - unregister_framebuffer(fbinfo_pnl); - - sm501fb_stop(info); - sm501fb_info_release(info); - - framebuffer_release(fbinfo_pnl); - framebuffer_release(fbinfo_crt); - - return 0; -} - -#ifdef CONFIG_PM - -static int sm501fb_suspend_fb(struct sm501fb_info *info, - enum sm501_controller head) -{ - struct fb_info *fbi = info->fb[head]; - struct sm501fb_par *par = fbi->par; - - if (par->screen.size == 0) - return 0; - - /* blank the relevant interface to ensure unit power minimised */ - (par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi); - - /* tell console/fb driver we are suspending */ - - acquire_console_sem(); - fb_set_suspend(fbi, 1); - release_console_sem(); - - /* backup copies in case chip is powered down over suspend */ - - par->store_fb = vmalloc(par->screen.size); - if (par->store_fb == NULL) { - dev_err(info->dev, "no memory to store screen\n"); - return -ENOMEM; - } - - par->store_cursor = vmalloc(par->cursor.size); - if (par->store_cursor == NULL) { - dev_err(info->dev, "no memory to store cursor\n"); - goto err_nocursor; - } - - dev_dbg(info->dev, "suspending screen to %p\n", par->store_fb); - dev_dbg(info->dev, "suspending cursor to %p\n", par->store_cursor); - - memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size); - memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size); - - return 0; - - err_nocursor: - vfree(par->store_fb); - par->store_fb = NULL; - - return -ENOMEM; -} - -static void sm501fb_resume_fb(struct sm501fb_info *info, - enum sm501_controller head) -{ - struct fb_info *fbi = info->fb[head]; - struct sm501fb_par *par = fbi->par; - - if (par->screen.size == 0) - return; - - /* re-activate the configuration */ - - (par->ops.fb_set_par)(fbi); - - /* restore the data */ - - dev_dbg(info->dev, "restoring screen from %p\n", par->store_fb); - dev_dbg(info->dev, "restoring cursor from %p\n", par->store_cursor); - - if (par->store_fb) - memcpy_toio(par->screen.k_addr, par->store_fb, - par->screen.size); - - if (par->store_cursor) - memcpy_toio(par->cursor.k_addr, par->store_cursor, - par->cursor.size); - - acquire_console_sem(); - fb_set_suspend(fbi, 0); - release_console_sem(); - - vfree(par->store_fb); - vfree(par->store_cursor); -} - - -/* suspend and resume support */ - -static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state) -{ - struct sm501fb_info *info = platform_get_drvdata(pdev); - - /* store crt control to resume with */ - info->pm_crt_ctrl = readl(info->regs + SM501_DC_CRT_CONTROL); - - sm501fb_suspend_fb(info, HEAD_CRT); - sm501fb_suspend_fb(info, HEAD_PANEL); - - /* turn off the clocks, in case the device is not powered down */ - sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0); - - return 0; -} - -#define SM501_CRT_CTRL_SAVE (SM501_DC_CRT_CONTROL_TVP | \ - SM501_DC_CRT_CONTROL_SEL) - - -static int sm501fb_resume(struct platform_device *pdev) -{ - struct sm501fb_info *info = platform_get_drvdata(pdev); - unsigned long crt_ctrl; - - sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1); - - /* restore the items we want to be saved for crt control */ - - crt_ctrl = readl(info->regs + SM501_DC_CRT_CONTROL); - crt_ctrl &= ~SM501_CRT_CTRL_SAVE; - crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE; - writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL); - - sm501fb_resume_fb(info, HEAD_CRT); - sm501fb_resume_fb(info, HEAD_PANEL); - - return 0; -} - -#else -#define sm501fb_suspend NULL -#define sm501fb_resume NULL -#endif - -static struct platform_driver sm501fb_driver = { - .probe = sm501fb_probe, - .remove = sm501fb_remove, - .suspend = sm501fb_suspend, - .resume = sm501fb_resume, - .driver = { - .name = "sm501-fb", - .owner = THIS_MODULE, - }, -}; - -static int __devinit sm501fb_init(void) -{ - return platform_driver_register(&sm501fb_driver); -} - -static void __exit sm501fb_cleanup(void) -{ - platform_driver_unregister(&sm501fb_driver); -} - -module_init(sm501fb_init); -module_exit(sm501fb_cleanup); - -MODULE_AUTHOR("Ben Dooks, Vincent Sanders"); -MODULE_DESCRIPTION("SM501 Framebuffer driver"); -MODULE_LICENSE("GPL v2"); |