--- /dev/null
+/* 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 <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 adress */
+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 */
+
+ 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)
+
+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 > 255)
+ return -EINVAL;
+
+ if ((var->xres + var->right_margin) >= 4096)
+ return -EINVAL;
+
+ 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;
+
+ break;
+
+ case 16:
+ if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
+ var->red.offset = 11;
+ var->green.offset = 5;
+ var->blue.offset = 0;
+ } else {
+ var->blue.offset = 11;
+ var->green.offset = 5;
+ var->red.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_DIRECTCOLOR;
+ 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;
+ 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;
+
+ 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);
+
+ control |= SM501_DC_PANEL_CONTROL_BIAS; /* VBIASEN */
+ writel(control, ctrl_reg);
+ sm501fb_sync_regs(fbi);
+ mdelay(10);
+
+ control |= SM501_DC_PANEL_CONTROL_FPEN;
+ writel(control, ctrl_reg);
+
+ } else if (!to && (control & SM501_DC_PANEL_CONTROL_VDD) != 0) {
+ /* disable panel power */
+
+ control &= ~SM501_DC_PANEL_CONTROL_FPEN;
+ writel(control, ctrl_reg);
+ sm501fb_sync_regs(fbi);
+ mdelay(10);
+
+ 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;
+ 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);
+
+ /* 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
+*/
+
+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 %08x, bgcol %08x\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", sizeof("crt")) == 0)
+ head = HEAD_CRT;
+ else if (strnicmp(buf, "panel", sizeof("panel")) == 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 (head == HEAD_CRT) ? 3 : 5;
+}
+
+/* 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
+*/
+
+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 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;
+
+ /* 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;
+
+ /* 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;
+ }
+
+ memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size);
+ memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size);
+
+ /* blank the relevant interface to ensure unit power minimised */
+ (par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi);
+
+ return 0;
+
+ err_nocursor:
+ vfree(par->store_fb);
+
+ 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 */
+
+ memcpy_toio(par->screen.k_addr, par->store_fb, par->screen.size);
+ memcpy_toio(par->cursor.k_addr, par->store_cursor, par->cursor.size);
+
+ 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);
+
+ 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;
+}
+
+static int sm501fb_resume(struct platform_device *pdev)
+{
+ struct sm501fb_info *info = platform_get_drvdata(pdev);
+
+ sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1);
+
+ 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,
+ },
+};
+
+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");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff