diff options
Diffstat (limited to 'drivers/video/fbdev/sm501fb.c')
| -rw-r--r-- | drivers/video/fbdev/sm501fb.c | 2228 |
1 files changed, 2228 insertions, 0 deletions
diff --git a/drivers/video/fbdev/sm501fb.c b/drivers/video/fbdev/sm501fb.c new file mode 100644 index 0000000000..65c799ac56 --- /dev/null +++ b/drivers/video/fbdev/sm501fb.c @@ -0,0 +1,2228 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* linux/drivers/video/sm501fb.c + * + * Copyright (c) 2006 Simtec Electronics + * Vincent Sanders <vince@simtec.co.uk> + * Ben Dooks <ben@simtec.co.uk> + * + * 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 <linux/io.h> + +#include <linux/uaccess.h> +#include <asm/div64.h> + +#ifdef CONFIG_PM +#include <linux/pm.h> +#endif + +#include <linux/sm501.h> +#include <linux/sm501-regs.h> + +#include "edid.h" + +static char *fb_mode = "640x480-16@60"; +static unsigned long default_bpp = 16; + +static const struct fb_videomode sm501_default_mode = { + .refresh = 60, + .xres = 640, + .yres = 480, + .pixclock = 20833, + .left_margin = 142, + .right_margin = 13, + .upper_margin = 21, + .lower_margin = 1, + .hsync_len = 69, + .vsync_len = 3, + .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, + .vmode = FB_VMODE_NONINTERLACED +}; + +#define NR_PALETTE 256 + +enum sm501_controller { + HEAD_CRT = 0, + HEAD_PANEL = 1, +}; + +/* SM501 memory address. + * + * This structure is used to track memory usage within the SM501 framebuffer + * allocation. The sm_addr field is stored as an offset as it is often used + * against both the physical and mapped addresses. + */ +struct sm501_mem { + unsigned long size; + unsigned long sm_addr; /* offset from base of sm501 fb. */ + 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 resource *regs2d_res; /* 2d 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 *regs2d; /* 2d remapped registers */ + void __iomem *fbmem; /* remapped framebuffer */ + size_t fbmem_len; /* length of remapped region */ + u8 *edid_data; +}; + +/* 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) +{ + smc501_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, u32 smem_len) +{ + struct sm501fb_par *par; + struct fb_info *fbi; + unsigned int ptr; + unsigned int end; + + switch (why) { + case SM501_MEMF_CURSOR: + ptr = inf->fbmem_len - size; + inf->fbmem_len = ptr; /* adjust available memory. */ + break; + + case SM501_MEMF_PANEL: + if (size > inf->fbmem_len) + return -ENOMEM; + + ptr = inf->fbmem_len - size; + fbi = inf->fb[HEAD_CRT]; + + /* round down, some programs such as directfb do not draw + * 0,0 correctly unless the start is aligned to a page start. + */ + + if (ptr > 0) + ptr &= ~(PAGE_SIZE - 1); + + if (fbi && ptr < smem_len) + return -ENOMEM; + + break; + + case SM501_MEMF_CRT: + ptr = 0; + + /* check to see if we have panel memory allocated + * which would put an limit on available memory. */ + + fbi = inf->fb[HEAD_PANEL]; + if (fbi) { + par = fbi->par; + end = par->screen.k_addr ? par->screen.sm_addr : inf->fbmem_len; + } else + end = inf->fbmem_len; + + if ((ptr + size) > end) + return -ENOMEM; + + break; + + case SM501_MEMF_ACCEL: + fbi = inf->fb[HEAD_CRT]; + ptr = fbi ? smem_len : 0; + + fbi = inf->fb[HEAD_PANEL]; + if (fbi) { + par = fbi->par; + end = par->screen.sm_addr; + } else + end = inf->fbmem_len; + + if ((ptr + size) > end) + 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 opposite 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) { + smc501_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 achieve in Hz */ + unsigned int mem_type; + unsigned int clock_type; + unsigned int head_addr; + unsigned int smem_len; + + 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; + 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, smem_len, smem_len)) { + dev_err(fbi->dev, "no memory available\n"); + return -ENOMEM; + } + + mutex_lock(&info->mm_lock); + info->fix.smem_start = fbi->fbmem_res->start + par->screen.sm_addr; + info->fix.smem_len = smem_len; + mutex_unlock(&info->mm_lock); + + info->screen_base = fbi->fbmem + par->screen.sm_addr; + info->screen_size = info->fix.smem_len; + + /* set start of framebuffer to the screen */ + + smc501_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; + + smc501_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); + + smc501_writel(reg, base + SM501_OFF_DC_H_TOT); + + /* program horizontal sync */ + + reg = var->hsync_len << 16; + reg |= var->xres + var->right_margin - 1; + + smc501_writel(reg, base + SM501_OFF_DC_H_SYNC); + + /* program vertical total */ + + reg = (v_total(var) - 1) << 16; + reg |= (var->yres - 1); + + smc501_writel(reg, base + SM501_OFF_DC_V_TOT); + + /* program vertical sync */ + reg = var->vsync_len << 16; + reg |= var->yres + var->lower_margin - 1; + + smc501_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 = info->var.bits_per_pixel / 8; + unsigned long reg; + unsigned long xoffs; + + xoffs = var->xoffset * bytes_pixel; + + reg = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL); + + reg &= ~SM501_DC_CRT_CONTROL_PIXEL_MASK; + reg |= ((xoffs & 15) / bytes_pixel) << 4; + smc501_writel(reg, fbi->regs + SM501_DC_CRT_CONTROL); + + reg = (par->screen.sm_addr + xoffs + + var->yoffset * info->fix.line_length); + smc501_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 | (info->var.xres_virtual << 16); + smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH); + + reg = var->yoffset | (info->var.yres_virtual << 16); + smc501_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 = smc501_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, + info->fix.smem_len); + 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); + + smc501_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 = smc501_readl(ctrl_reg); + + if (to && (control & SM501_DC_PANEL_CONTROL_VDD) == 0) { + /* enable panel power */ + + control |= SM501_DC_PANEL_CONTROL_VDD; /* FPVDDEN */ + smc501_writel(control, ctrl_reg); + sm501fb_sync_regs(fbi); + mdelay(10); + + control |= SM501_DC_PANEL_CONTROL_DATA; /* DATA */ + smc501_writel(control, ctrl_reg); + sm501fb_sync_regs(fbi); + mdelay(10); + + /* VBIASEN */ + + if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) { + if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN) + control &= ~SM501_DC_PANEL_CONTROL_BIAS; + else + control |= SM501_DC_PANEL_CONTROL_BIAS; + + smc501_writel(control, ctrl_reg); + sm501fb_sync_regs(fbi); + mdelay(10); + } + + if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) { + if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN) + control &= ~SM501_DC_PANEL_CONTROL_FPEN; + else + control |= SM501_DC_PANEL_CONTROL_FPEN; + + smc501_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_NO_FPEN)) { + if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN) + control |= SM501_DC_PANEL_CONTROL_FPEN; + else + control &= ~SM501_DC_PANEL_CONTROL_FPEN; + + smc501_writel(control, ctrl_reg); + sm501fb_sync_regs(fbi); + mdelay(10); + } + + if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) { + if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN) + control |= SM501_DC_PANEL_CONTROL_BIAS; + else + control &= ~SM501_DC_PANEL_CONTROL_BIAS; + + smc501_writel(control, ctrl_reg); + sm501fb_sync_regs(fbi); + mdelay(10); + } + + control &= ~SM501_DC_PANEL_CONTROL_DATA; + smc501_writel(control, ctrl_reg); + sm501fb_sync_regs(fbi); + mdelay(10); + + control &= ~SM501_DC_PANEL_CONTROL_VDD; + smc501_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 = smc501_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(); + } + + smc501_writel(0x0, fbi->regs + SM501_DC_PANEL_PANNING_CONTROL); + + /* panel plane top left and bottom right location */ + + smc501_writel(0x00, fbi->regs + SM501_DC_PANEL_TL_LOC); + + reg = var->xres - 1; + reg |= (var->yres - 1) << 16; + + smc501_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; + + smc501_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; + + smc501_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 = smc501_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); + fallthrough; + + 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; + + } + + smc501_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 = smc501_readl(base + SM501_OFF_HWC_ADDR); + + if (cursor->enable) + smc501_writel(hwc_addr | SM501_HWC_EN, + base + SM501_OFF_HWC_ADDR); + else + smc501_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; + + smc501_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); + + smc501_writel(bg, base + SM501_OFF_HWC_COLOR_1_2); + smc501_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) + smc501_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 = smc501_readl(info->regs + SM501_DC_CRT_CONTROL); + ctrl &= SM501_DC_CRT_CONTROL_SEL; + + return sysfs_emit(buf, "%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 (strncasecmp(buf, "crt", 3) == 0) + head = HEAD_CRT; + else if (strncasecmp(buf, "panel", 5) == 0) + head = HEAD_PANEL; + else + return -EINVAL; + + dev_info(dev, "setting crt source to head %d\n", head); + + ctrl = smc501_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; + } + + smc501_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, 0664, 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, + smc501_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); + +static struct attribute *sm501fb_attrs[] = { + &dev_attr_crt_src.attr, + &dev_attr_fbregs_pnl.attr, + &dev_attr_fbregs_crt.attr, + NULL, +}; +ATTRIBUTE_GROUPS(sm501fb); + +/* acceleration operations */ +static int sm501fb_sync(struct fb_info *info) +{ + int count = 1000000; + struct sm501fb_par *par = info->par; + struct sm501fb_info *fbi = par->info; + + /* wait for the 2d engine to be ready */ + while ((count > 0) && + (smc501_readl(fbi->regs + SM501_SYSTEM_CONTROL) & + SM501_SYSCTRL_2D_ENGINE_STATUS) != 0) + count--; + + if (count <= 0) { + fb_err(info, "Timeout waiting for 2d engine sync\n"); + return 1; + } + return 0; +} + +static void sm501fb_copyarea(struct fb_info *info, const struct fb_copyarea *area) +{ + struct sm501fb_par *par = info->par; + struct sm501fb_info *fbi = par->info; + int width = area->width; + int height = area->height; + int sx = area->sx; + int sy = area->sy; + int dx = area->dx; + int dy = area->dy; + unsigned long rtl = 0; + + /* source clip */ + if ((sx >= info->var.xres_virtual) || + (sy >= info->var.yres_virtual)) + /* source Area not within virtual screen, skipping */ + return; + if ((sx + width) >= info->var.xres_virtual) + width = info->var.xres_virtual - sx - 1; + if ((sy + height) >= info->var.yres_virtual) + height = info->var.yres_virtual - sy - 1; + + /* dest clip */ + if ((dx >= info->var.xres_virtual) || + (dy >= info->var.yres_virtual)) + /* Destination Area not within virtual screen, skipping */ + return; + if ((dx + width) >= info->var.xres_virtual) + width = info->var.xres_virtual - dx - 1; + if ((dy + height) >= info->var.yres_virtual) + height = info->var.yres_virtual - dy - 1; + + if ((sx < dx) || (sy < dy)) { + rtl = 1 << 27; + sx += width - 1; + dx += width - 1; + sy += height - 1; + dy += height - 1; + } + + if (sm501fb_sync(info)) + return; + + /* set the base addresses */ + smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE); + smc501_writel(par->screen.sm_addr, + fbi->regs2d + SM501_2D_DESTINATION_BASE); + + /* set the window width */ + smc501_writel((info->var.xres << 16) | info->var.xres, + fbi->regs2d + SM501_2D_WINDOW_WIDTH); + + /* set window stride */ + smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual, + fbi->regs2d + SM501_2D_PITCH); + + /* set data format */ + switch (info->var.bits_per_pixel) { + case 8: + smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH); + break; + case 16: + smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH); + break; + case 32: + smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH); + break; + } + + /* 2d compare mask */ + smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK); + + /* 2d mask */ + smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK); + + /* source and destination x y */ + smc501_writel((sx << 16) | sy, fbi->regs2d + SM501_2D_SOURCE); + smc501_writel((dx << 16) | dy, fbi->regs2d + SM501_2D_DESTINATION); + + /* w/h */ + smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION); + + /* do area move */ + smc501_writel(0x800000cc | rtl, fbi->regs2d + SM501_2D_CONTROL); +} + +static void sm501fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) +{ + struct sm501fb_par *par = info->par; + struct sm501fb_info *fbi = par->info; + int width = rect->width, height = rect->height; + + if ((rect->dx >= info->var.xres_virtual) || + (rect->dy >= info->var.yres_virtual)) + /* Rectangle not within virtual screen, skipping */ + return; + if ((rect->dx + width) >= info->var.xres_virtual) + width = info->var.xres_virtual - rect->dx - 1; + if ((rect->dy + height) >= info->var.yres_virtual) + height = info->var.yres_virtual - rect->dy - 1; + + if (sm501fb_sync(info)) + return; + + /* set the base addresses */ + smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE); + smc501_writel(par->screen.sm_addr, + fbi->regs2d + SM501_2D_DESTINATION_BASE); + + /* set the window width */ + smc501_writel((info->var.xres << 16) | info->var.xres, + fbi->regs2d + SM501_2D_WINDOW_WIDTH); + + /* set window stride */ + smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual, + fbi->regs2d + SM501_2D_PITCH); + + /* set data format */ + switch (info->var.bits_per_pixel) { + case 8: + smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH); + break; + case 16: + smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH); + break; + case 32: + smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH); + break; + } + + /* 2d compare mask */ + smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK); + + /* 2d mask */ + smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK); + + /* colour */ + smc501_writel(rect->color, fbi->regs2d + SM501_2D_FOREGROUND); + + /* x y */ + smc501_writel((rect->dx << 16) | rect->dy, + fbi->regs2d + SM501_2D_DESTINATION); + + /* w/h */ + smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION); + + /* do rectangle fill */ + smc501_writel(0x800100cc, fbi->regs2d + SM501_2D_CONTROL); +} + + +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 = sm501fb_fillrect, + .fb_copyarea = sm501fb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_sync = sm501fb_sync, +}; + +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 = sm501fb_fillrect, + .fb_copyarea = sm501fb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_sync = sm501fb_sync, +}; + +/* sm501_init_cursor + * + * initialise hw cursor parameters +*/ + +static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base) +{ + struct sm501fb_par *par; + struct sm501fb_info *info; + int ret; + + if (fbi == NULL) + return 0; + + par = fbi->par; + info = par->info; + + par->cursor_regs = info->regs + reg_base; + + ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024, + fbi->fix.smem_len); + if (ret < 0) + return ret; + + /* initialise the colour registers */ + + smc501_writel(par->cursor.sm_addr, + par->cursor_regs + SM501_OFF_HWC_ADDR); + + smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC); + smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2); + smc501_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 = &pdev->dev; + int k; + int ret; + + 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 display + * controller 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, + resource_size(res), + pdev->name); + + if (info->regs_res == NULL) { + dev_err(dev, "cannot claim registers\n"); + ret = -ENXIO; + goto err_release; + } + + info->regs = ioremap(res->start, resource_size(res)); + if (info->regs == NULL) { + dev_err(dev, "cannot remap registers\n"); + ret = -ENXIO; + goto err_regs_res; + } + + /* allocate, reserve and remap resources for 2d + * controller registers */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (res == NULL) { + dev_err(dev, "no resource definition for 2d registers\n"); + ret = -ENOENT; + goto err_regs_map; + } + + info->regs2d_res = request_mem_region(res->start, + resource_size(res), + pdev->name); + + if (info->regs2d_res == NULL) { + dev_err(dev, "cannot claim registers\n"); + ret = -ENXIO; + goto err_regs_map; + } + + info->regs2d = ioremap(res->start, resource_size(res)); + if (info->regs2d == NULL) { + dev_err(dev, "cannot remap registers\n"); + ret = -ENXIO; + goto err_regs2d_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_regs2d_map; + } + + info->fbmem_res = request_mem_region(res->start, + resource_size(res), + pdev->name); + if (info->fbmem_res == NULL) { + dev_err(dev, "cannot claim framebuffer\n"); + ret = -ENXIO; + goto err_regs2d_map; + } + + info->fbmem = ioremap(res->start, resource_size(res)); + if (info->fbmem == NULL) { + dev_err(dev, "cannot remap framebuffer\n"); + ret = -ENXIO; + goto err_mem_res; + } + + info->fbmem_len = resource_size(res); + + /* clear framebuffer memory - avoids garbage data on unused fb */ + memset_io(info->fbmem, 0, info->fbmem_len); + + /* clear palette ram - undefined at power on */ + for (k = 0; k < (256 * 3); k++) + smc501_writel(0, info->regs + SM501_DC_PANEL_PALETTE + (k * 4)); + + /* enable display controller */ + sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1); + + /* enable 2d controller */ + sm501_unit_power(dev->parent, SM501_GATE_2D_ENGINE, 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_mem_region(info->fbmem_res->start, + resource_size(info->fbmem_res)); + + err_regs2d_map: + iounmap(info->regs2d); + + err_regs2d_res: + release_mem_region(info->regs2d_res->start, + resource_size(info->regs2d_res)); + + err_regs_map: + iounmap(info->regs); + + err_regs_res: + release_mem_region(info->regs_res->start, + resource_size(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_mem_region(info->fbmem_res->start, + resource_size(info->fbmem_res)); + + iounmap(info->regs2d); + release_mem_region(info->regs2d_res->start, + resource_size(info->regs2d_res)); + + iounmap(info->regs); + release_mem_region(info->regs_res->start, + resource_size(info->regs_res)); +} + +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 = smc501_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; + smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL); + } + + break; + + case HEAD_PANEL: + pd = info->pdata->fb_pnl; + ctrl = smc501_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; + smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL); + enable = 0; + } + + strscpy(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 dependent 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_READS_FAST | + FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT | + FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN; + +#if defined(CONFIG_OF) +#ifdef __BIG_ENDIAN + if (of_property_read_bool(info->dev->parent->of_node, "little-endian")) + fb->flags |= FBINFO_FOREIGN_ENDIAN; +#else + if (of_property_read_bool(info->dev->parent->of_node, "big-endian")) + fb->flags |= FBINFO_FOREIGN_ENDIAN; +#endif +#endif + /* 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 (info->edid_data) { + /* Now build modedb from EDID */ + fb_edid_to_monspecs(info->edid_data, &fb->monspecs); + fb_videomode_to_modelist(fb->monspecs.modedb, + fb->monspecs.modedb_len, + &fb->modelist); + } + + 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 { + if (info->edid_data) { + ret = fb_find_mode(&fb->var, fb, fb_mode, + fb->monspecs.modedb, + fb->monspecs.modedb_len, + &sm501_default_mode, default_bpp); + /* edid_data is no longer needed, free it */ + kfree(info->edid_data); + } else { + ret = fb_find_mode(&fb->var, fb, + NULL, NULL, 0, NULL, 8); + } + + switch (ret) { + case 1: + dev_info(info->dev, "using mode specified in " + "@mode\n"); + break; + case 2: + dev_info(info->dev, "using mode specified in " + "@mode with ignored refresh rate\n"); + break; + case 3: + dev_info(info->dev, "using mode default " + "mode\n"); + break; + case 4: + dev_info(info->dev, "using mode from list\n"); + break; + default: + dev_info(info->dev, "ret = %d\n", ret); + dev_info(info->dev, "failed to find mode\n"); + return -EINVAL; + } + } + } + + /* initialise and set the palette */ + if (fb_alloc_cmap(&fb->cmap, NR_PALETTE, 0)) { + dev_err(info->dev, "failed to allocate cmap memory\n"); + return -ENOMEM; + } + 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"); + + 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 sm501fb_probe_one(struct sm501fb_info *info, + enum sm501_controller head) +{ + unsigned char *name = (head == HEAD_CRT) ? "crt" : "panel"; + struct sm501_platdata_fbsub *pd; + struct sm501fb_par *par; + struct fb_info *fbi; + + pd = (head == HEAD_CRT) ? info->pdata->fb_crt : info->pdata->fb_pnl; + + /* Do not initialise if we've not been given any platform data */ + if (pd == NULL) { + dev_info(info->dev, "no data for fb %s (disabled)\n", name); + return 0; + } + + fbi = framebuffer_alloc(sizeof(struct sm501fb_par), info->dev); + if (!fbi) + return -ENOMEM; + + par = fbi->par; + par->info = info; + par->head = head; + fbi->pseudo_palette = &par->pseudo_palette; + + info->fb[head] = fbi; + + return 0; +} + +/* Free up anything allocated by sm501fb_init_fb */ + +static void sm501_free_init_fb(struct sm501fb_info *info, + enum sm501_controller head) +{ + struct fb_info *fbi = info->fb[head]; + + if (!fbi) + return; + + fb_dealloc_cmap(&fbi->cmap); +} + +static int sm501fb_start_one(struct sm501fb_info *info, + enum sm501_controller head, const char *drvname) +{ + struct fb_info *fbi = info->fb[head]; + int ret; + + if (!fbi) + return 0; + + mutex_init(&info->fb[head]->mm_lock); + + ret = sm501fb_init_fb(info->fb[head], head, drvname); + if (ret) { + dev_err(info->dev, "cannot initialise fb %s\n", drvname); + return ret; + } + + ret = register_framebuffer(info->fb[head]); + if (ret) { + dev_err(info->dev, "failed to register fb %s\n", drvname); + sm501_free_init_fb(info, head); + return ret; + } + + dev_info(info->dev, "fb%d: %s frame buffer\n", fbi->node, fbi->fix.id); + + return 0; +} + +static int sm501fb_probe(struct platform_device *pdev) +{ + struct sm501fb_info *info; + struct device *dev = &pdev->dev; + int ret; + + /* allocate our framebuffers */ + info = kzalloc(sizeof(*info), GFP_KERNEL); + if (!info) { + dev_err(dev, "failed to allocate state\n"); + return -ENOMEM; + } + + info->dev = dev = &pdev->dev; + platform_set_drvdata(pdev, info); + + if (dev->parent->platform_data) { + struct sm501_platdata *pd = dev->parent->platform_data; + info->pdata = pd->fb; + } + + if (info->pdata == NULL) { + int found = 0; +#if defined(CONFIG_OF) + struct device_node *np = pdev->dev.parent->of_node; + const u8 *prop; + const char *cp; + int len; + + info->pdata = &sm501fb_def_pdata; + if (np) { + /* Get EDID */ + cp = of_get_property(np, "mode", &len); + if (cp) + strcpy(fb_mode, cp); + prop = of_get_property(np, "edid", &len); + if (prop && len == EDID_LENGTH) { + info->edid_data = kmemdup(prop, EDID_LENGTH, + GFP_KERNEL); + if (info->edid_data) + found = 1; + } + } +#endif + if (!found) { + dev_info(dev, "using default configuration data\n"); + info->pdata = &sm501fb_def_pdata; + } + } + + /* probe for the presence of each panel */ + + ret = sm501fb_probe_one(info, HEAD_CRT); + if (ret < 0) { + dev_err(dev, "failed to probe CRT\n"); + goto err_alloc; + } + + ret = sm501fb_probe_one(info, HEAD_PANEL); + if (ret < 0) { + dev_err(dev, "failed to probe PANEL\n"); + goto err_probed_crt; + } + + if (info->fb[HEAD_PANEL] == NULL && + info->fb[HEAD_CRT] == NULL) { + dev_err(dev, "no framebuffers found\n"); + ret = -ENODEV; + goto err_alloc; + } + + /* get the resources for both of the framebuffers */ + + ret = sm501fb_start(info, pdev); + if (ret) { + dev_err(dev, "cannot initialise SM501\n"); + goto err_probed_panel; + } + + ret = sm501fb_start_one(info, HEAD_CRT, driver_name_crt); + if (ret) { + dev_err(dev, "failed to start CRT\n"); + goto err_started; + } + + ret = sm501fb_start_one(info, HEAD_PANEL, driver_name_pnl); + if (ret) { + dev_err(dev, "failed to start Panel\n"); + goto err_started_crt; + } + + /* we registered, return ok */ + return 0; + +err_started_crt: + unregister_framebuffer(info->fb[HEAD_CRT]); + sm501_free_init_fb(info, HEAD_CRT); + +err_started: + sm501fb_stop(info); + +err_probed_panel: + framebuffer_release(info->fb[HEAD_PANEL]); + +err_probed_crt: + framebuffer_release(info->fb[HEAD_CRT]); + +err_alloc: + kfree(info); + + return ret; +} + + +/* + * Cleanup + */ +static void 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]; + + sm501_free_init_fb(info, HEAD_CRT); + sm501_free_init_fb(info, HEAD_PANEL); + + if (fbinfo_crt) + unregister_framebuffer(fbinfo_crt); + if (fbinfo_pnl) + unregister_framebuffer(fbinfo_pnl); + + sm501fb_stop(info); + kfree(info); + + framebuffer_release(fbinfo_pnl); + framebuffer_release(fbinfo_crt); +} + +#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; + + if (!fbi) + return 0; + + 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 */ + + console_lock(); + fb_set_suspend(fbi, 1); + console_unlock(); + + /* 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; + + if (!fbi) + return; + + 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); + + console_lock(); + fb_set_suspend(fbi, 0); + console_unlock(); + + 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 = smc501_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 = smc501_readl(info->regs + SM501_DC_CRT_CONTROL); + crt_ctrl &= ~SM501_CRT_CTRL_SAVE; + crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE; + smc501_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_new = sm501fb_remove, + .suspend = sm501fb_suspend, + .resume = sm501fb_resume, + .driver = { + .name = "sm501-fb", + .dev_groups = sm501fb_groups, + }, +}; + +module_platform_driver(sm501fb_driver); + +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 mode"); +MODULE_AUTHOR("Ben Dooks, Vincent Sanders"); +MODULE_DESCRIPTION("SM501 Framebuffer driver"); +MODULE_LICENSE("GPL v2"); |