/*
- * linux/drivers/video/epson1355fb.c
- * -- Support for the Epson SED1355 LCD/CRT controller
+ * linux/drivers/video/epson1355fb.c -- Epson S1D13505 frame buffer for 2.5.
*
- * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
+ * Epson Research S1D13505 Embedded RAMDAC LCD/CRT Controller
+ * (previously known as SED1355)
*
- * based on linux/drivers/video/skeletonfb.c, which was
+ * Cf. http://www.erd.epson.com/vdc/html/S1D13505.html
+ *
+ *
+ * Copyright (C) Hewlett-Packard Company. All rights reserved.
+ *
+ * Written by Christopher Hoover <ch@hpl.hp.com>
+ *
+ * Adapted from:
+ *
+ * linux/drivers/video/skeletonfb.c
+ * Modified to new api Jan 2001 by James Simmons (jsimmons@infradead.org)
* Created 28 Dec 1997 by Geert Uytterhoeven
*
+ * linux/drivers/video/epson1355fb.c (2.4 driver)
+ * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
+ *
* This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive
- * for more details.
- */
-/* TODO (roughly in order of priority):
- * 16 bpp support
- * crt support
- * hw cursor support
- * SwivelView
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ *
+ * Noteworthy Issues
+ * -----------------
+ *
+ * This driver is complicated by the fact that this is a 16-bit chip
+ * and, on at least one platform (ceiva), we can only do 16-bit reads
+ * and writes to the framebuffer. We hide this from user space
+ * except in the case of mmap().
+ *
+ *
+ * To Do
+ * -----
+ *
+ * - Test 8-bit pseudocolor mode
+ * - Allow setting bpp, virtual resolution
+ * - Implement horizontal panning
+ * - (maybe) Implement hardware cursor
*/
-#include <asm/io.h>
-#include <linux/config.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/fb.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
#include <linux/module.h>
-#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
#include <linux/string.h>
+#include <linux/mm.h>
#include <linux/tty.h>
-#include <video/fbcon-cfb8.h>
-#include <video/fbcon-mfb.h>
-#include <video/fbcon.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <asm/types.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
-/* Register defines. The docs don't seem to provide nice mnemonic names
- * so I made them up myself ... */
+#include <video/epson1355.h>
-#define E1355_PANEL 0x02
-#define E1355_DISPLAY 0x0D
-#define E1355_MISC 0x1B
-#define E1355_GPIO 0x20
-#define E1355_LUT_INDEX 0x24
-#define E1355_LUT_DATA 0x26
+struct epson1355_par {
+ unsigned long reg_addr;
+};
+
+/* ------------------------------------------------------------------------- */
#ifdef CONFIG_SUPERH
-#define E1355_REG_BASE CONFIG_E1355_REG_BASE
-#define E1355_FB_BASE CONFIG_E1355_FB_BASE
-static inline u8 e1355_read_reg(int index)
+static inline u8 epson1355_read_reg(int index)
{
- return ctrl_inb(E1355_REG_BASE + index);
+ return ctrl_inb(par.reg_addr + index);
}
-static inline void e1355_write_reg(u8 data, int index)
+static inline void epson1355_write_reg(u8 data, int index)
{
- ctrl_outb(data, E1355_REG_BASE + index);
+ ctrl_outb(data, par.reg_addr + index);
}
-static inline u16 e1355_read_reg16(int index)
+#elif defined(CONFIG_ARM)
+
+# ifdef CONFIG_ARCH_CEIVA
+# include <asm/arch/hardware.h>
+# define EPSON1355FB_BASE_PHYS (CEIVA_PHYS_SED1355)
+# endif
+
+static inline u8 epson1355_read_reg(struct epson1355_par *par, int index)
{
- return e1355_read_reg(index) + (e1355_read_reg(index+1) << 8);
+ return __raw_readb(par->reg_addr + index);
}
-static inline void e1355_write_reg16(u16 data, int index)
+static inline void epson1355_write_reg(struct epson1355_par *par, u8 data, int index)
{
- e1355_write_reg((data&0xff), index);
- e1355_write_reg(((data>>8)&0xff), index + 1);
+ __raw_writeb(data, par->reg_addr + index);
}
+
#else
-#error unknown architecture
+# error "no architecture-specific epson1355_{read,write}_reg"
#endif
-struct e1355fb_info {
- struct fb_info_gen gen;
-};
-
-static int current_par_valid = 0;
-static struct display disp;
+#ifndef EPSON1355FB_BASE_PHYS
+# error "EPSON1355FB_BASE_PHYS is not defined"
+#endif
-static struct fb_var_screeninfo default_var;
+#define EPSON1355FB_REGS_OFS (0)
+#define EPSON1355FB_REGS_PHYS (EPSON1355FB_BASE_PHYS + EPSON1355FB_REGS_OFS)
+#define EPSON1355FB_REGS_LEN (64)
-int e1355fb_init(void);
-int e1355fb_setup(char*);
-static int e1355_encode_var(struct fb_var_screeninfo *var, const void *par,
- struct fb_info_gen *info);
-/* ------------------- chipset specific functions -------------------------- */
+#define EPSON1355FB_FB_OFS (0x00200000)
+#define EPSON1355FB_FB_PHYS (EPSON1355FB_BASE_PHYS + EPSON1355FB_FB_OFS)
+#define EPSON1355FB_FB_LEN (2 * 1024 * 1024)
+/* ------------------------------------------------------------------------- */
-static void disable_hw_cursor(void)
+static inline u16 epson1355_read_reg16(struct epson1355_par *par, int index)
{
- u8 curs;
+ u8 lo = epson1355_read_reg(par, index);
+ u8 hi = epson1355_read_reg(par, index + 1);
- curs = e1355_read_reg(0x27);
- curs &= ~0xc0;
- e1355_write_reg(curs, 0x27);
+ return (hi << 8) | lo;
}
-static void e1355_detect(void)
+static inline void epson1355_write_reg16(struct epson1355_par *par, u16 data, int index)
{
- u8 rev;
+ u8 lo = data & 0xff;
+ u8 hi = (data >> 8) & 0xff;
- e1355_write_reg(0x00, E1355_MISC);
+ epson1355_write_reg(par, lo, index);
+ epson1355_write_reg(par, hi, index + 1);
+}
- rev = e1355_read_reg(0x00);
+static inline u32 epson1355_read_reg20(struct epson1355_par *par, int index)
+{
+ u8 b0 = epson1355_read_reg(par, index);
+ u8 b1 = epson1355_read_reg(par, index + 1);
+ u8 b2 = epson1355_read_reg(par, index + 2);
- if ((rev & 0xfc) != 0x0c) {
- printk(KERN_WARNING "Epson 1355 not detected\n");
- }
+ return (b2 & 0x0f) << 16 | (b1 << 8) | b0;
+}
- /* XXX */
- disable_hw_cursor();
+static inline void epson1355_write_reg20(struct epson1355_par *par, u32 data, int index)
+{
+ u8 b0 = data & 0xff;
+ u8 b1 = (data >> 8) & 0xff;
+ u8 b2 = (data >> 16) & 0x0f;
- e1355_encode_var(&default_var, NULL, NULL);
+ epson1355_write_reg(par, b0, index);
+ epson1355_write_reg(par, b1, index + 1);
+ epson1355_write_reg(par, b2, index + 2);
}
-struct e1355_par {
- u32 xres;
- u32 yres;
+/* ------------------------------------------------------------------------- */
- int bpp;
- int mem_bpp;
+static void set_lut(struct epson1355_par *par, u8 index, u8 r, u8 g, u8 b)
+{
+ epson1355_write_reg(par, index, REG_LUT_ADDR);
+ epson1355_write_reg(par, r, REG_LUT_DATA);
+ epson1355_write_reg(par, g, REG_LUT_DATA);
+ epson1355_write_reg(par, b, REG_LUT_DATA);
+}
- u32 panel_xres;
- u32 panel_yres;
-
- int panel_width;
- int panel_ymul;
-};
-static int e1355_encode_fix(struct fb_fix_screeninfo *fix,
- const void *raw_par,
- struct fb_info_gen *info)
+/**
+ * epson1355fb_setcolreg - sets a color register.
+ * @regno: Which register in the CLUT we are programming
+ * @red: The red value which can be up to 16 bits wide
+ * @green: The green value which can be up to 16 bits wide
+ * @blue: The blue value which can be up to 16 bits wide.
+ * @transp: If supported the alpha value which can be up to 16 bits wide.
+ * @info: frame buffer info structure
+ *
+ * Returns negative errno on error, or zero on success.
+ */
+static int epson1355fb_setcolreg(unsigned regno, unsigned r, unsigned g,
+ unsigned b, unsigned transp,
+ struct fb_info *info)
{
- const struct e1355_par *par = raw_par;
-
- memset(fix, 0, sizeof *fix);
-
- fix->type= FB_TYPE_PACKED_PIXELS;
-
- if (!par)
- BUG();
+ struct epson1355_par *par = info->par;
- if (par->bpp == 1) {
- fix->visual = FB_VISUAL_MONO10;
- } else if (par->bpp <= 8) {
- fix->visual = FB_VISUAL_PSEUDOCOLOR;
- } else {
- fix->visual = FB_VISUAL_TRUECOLOR;
- }
+ if (info->var.grayscale)
+ r = g = b = (19595 * r + 38470 * g + 7471 * b) >> 16;
- return 0;
-}
+ switch (info->fix.visual) {
+ case FB_VISUAL_TRUECOLOR:
+ if (regno >= 16)
+ return -EINVAL;
-static int e1355_set_bpp(struct e1355_par *par, int bpp)
-{
- int code;
- u8 disp;
- u16 bytes_per_line;
-
- switch(bpp) {
- case 1:
- code = 0; break;
- case 2:
- code = 1; break;
- case 4:
- code = 2; break;
- case 8:
- code = 3; break;
- case 16:
- code = 5; break;
- default:
- return -EINVAL; break;
- }
+ ((u32 *) info->pseudo_palette)[regno] =
+ (r & 0xf800) | (g & 0xfc00) >> 5 | (b & 0xf800) >> 11;
- disp = e1355_read_reg(E1355_DISPLAY);
- disp &= ~0x1c;
- disp |= code << 2;
- e1355_write_reg(disp, E1355_DISPLAY);
-
- bytes_per_line = (par->xres * bpp) >> 3;
-
- e1355_write_reg16(bytes_per_line, 0x16);
+ break;
+ case FB_VISUAL_PSEUDOCOLOR:
+ if (regno >= 256)
+ return -EINVAL;
- par->bpp = bpp;
+ set_lut(par, regno, r >> 8, g >> 8, b >> 8);
+ break;
+ default:
+ return -ENOSYS;
+ }
return 0;
}
-
-static int e1355_decode_var(const struct fb_var_screeninfo *var,
- void *raw_par,
- struct fb_info_gen *info)
+
+/* ------------------------------------------------------------------------- */
+
+/**
+ * epson1355fb_pan_display - Pans the display.
+ * @var: frame buffer variable screen structure
+ * @info: frame buffer structure that represents a single frame buffer
+ *
+ * Pan (or wrap, depending on the `vmode' field) the display using the
+ * `xoffset' and `yoffset' fields of the `var' structure.
+ * If the values don't fit, return -EINVAL.
+ *
+ * Returns negative errno on error, or zero on success.
+ */
+static int epson1355fb_pan_display(struct fb_var_screeninfo *var,
+ struct fb_info *info)
{
- struct e1355_par *par = raw_par;
- int ret;
+ struct epson1355_par *par = info->par;
+ u32 start;
- if (!par)
- BUG();
+ if (var->xoffset != 0) /* not yet ... */
+ return -EINVAL;
- /*
- * Don't allow setting any of these yet: xres and yres don't
- * make sense for LCD panels; xres_virtual and yres_virtual
- * should be supported fine by our hardware though.
- */
- if (var->xres != par->xres ||
- var->yres != par->yres ||
- var->xres != var->xres_virtual ||
- var->yres != var->yres_virtual ||
- var->xoffset != 0 ||
- var->yoffset != 0)
+ if (var->yoffset + info->var.yres > info->var.yres_virtual)
return -EINVAL;
- if(var->bits_per_pixel != par->bpp) {
- ret = e1355_set_bpp(par, var->bits_per_pixel);
+ start = (info->fix.line_length >> 1) * var->yoffset;
+
+ epson1355_write_reg20(par, start, REG_SCRN1_DISP_START_ADDR0);
- if (ret)
- goto out_err;
- }
-
return 0;
+}
- out_err:
- return ret;
+/* ------------------------------------------------------------------------- */
+
+static void lcd_enable(struct epson1355_par *par, int enable)
+{
+ u8 mode = epson1355_read_reg(par, REG_DISPLAY_MODE);
+
+ if (enable)
+ mode |= 1;
+ else
+ mode &= ~1;
+
+ epson1355_write_reg(par, mode, REG_DISPLAY_MODE);
}
-static void dump_panel_data(void)
+#if defined(CONFIG_ARCH_CEIVA)
+static void backlight_enable(int enable)
+{
+ /* ### this should be protected by a spinlock ... */
+ u8 pddr = clps_readb(PDDR);
+ if (enable)
+ pddr |= (1 << 5);
+ else
+ pddr &= ~(1 << 5);
+ clps_writeb(pddr, PDDR);
+}
+#else
+static void backlight_enable(int enable)
{
- u8 panel = e1355_read_reg(E1355_PANEL);
- int width[2][4] = { { 4, 8, 16, -1 }, { 9, 12, 16, -1 } };
-
- printk("%s %s %s panel, width %d bits\n",
- panel & 2 ? "dual" : "single",
- panel & 4 ? "color" : "mono",
- panel & 1 ? "TFT" : "passive",
- width[panel&1][(panel>>4)&3]);
-
- printk("resolution %d x %d\n",
- (e1355_read_reg(0x04) + 1) * 8,
- ((e1355_read_reg16(0x08) + 1) * (1 + ((panel & 3) == 2))));
}
+#endif
+
-static int e1355_bpp_to_var(int bpp, struct fb_var_screeninfo *var)
+/**
+ * epson1355fb_blank - blanks the display.
+ * @blank_mode: the blank mode we want.
+ * @info: frame buffer structure that represents a single frame buffer
+ *
+ * Blank the screen if blank_mode != 0, else unblank. Return 0 if
+ * blanking succeeded, != 0 if un-/blanking failed due to e.g. a
+ * video mode which doesn't support it. Implements VESA suspend
+ * and powerdown modes on hardware that supports disabling hsync/vsync:
+ * blank_mode == 2: suspend vsync
+ * blank_mode == 3: suspend hsync
+ * blank_mode == 4: powerdown
+ *
+ * Returns negative errno on error, or zero on success.
+ *
+ */
+static int epson1355fb_blank(int blank_mode, struct fb_info *info)
{
- switch(bpp) {
- case 1:
- case 2:
- case 4:
- case 8:
- var->bits_per_pixel = bpp;
- var->red.offset = var->green.offset = var->blue.offset = 0;
- var->red.length = var->green.length = var->blue.length = bpp;
+ struct epson1355_par *par = info->par;
+
+ switch (blank_mode) {
+ case VESA_NO_BLANKING:
+ lcd_enable(par, 1);
+ backlight_enable(1);
break;
- case 16:
- var->bits_per_pixel = 16;
- var->red.offset = 11;
- var->red.length = 5;
- var->green.offset = 5;
- var->green.length = 6;
- var->blue.offset = 0;
- var->blue.length = 5;
+ case VESA_VSYNC_SUSPEND:
+ case VESA_HSYNC_SUSPEND:
+ backlight_enable(0);
+ break;
+ case VESA_POWERDOWN:
+ backlight_enable(0);
+ lcd_enable(par, 0);
break;
+ default:
+ return -EINVAL;
}
-
return 0;
}
-static int e1355_encode_var(struct fb_var_screeninfo *var, const void *raw_par,
- struct fb_info_gen *info)
-{
- u8 panel, display;
- u32 xres, xres_virtual, yres;
- static int width[2][4] = { { 4, 8, 16, -1 }, { 9, 12, 16, -1 } };
- static int bpp_tab[8] = { 1, 2, 4, 8, 15, 16 };
- int bpp, hw_bpp;
- int is_color, is_dual, is_tft;
- int lcd_enabled, crt_enabled;
+/* ------------------------------------------------------------------------- */
- panel = e1355_read_reg(E1355_PANEL);
- display = e1355_read_reg(E1355_DISPLAY);
+/*
+ * We can't use the cfb generic routines, as we have to limit
+ * ourselves to 16-bit or 8-bit loads and stores to this 16-bit
+ * chip.
+ */
- is_color = (panel & 0x04) != 0;
- is_dual = (panel & 0x02) != 0;
- is_tft = (panel & 0x01) != 0;
+static inline void epson1355fb_fb_writel(unsigned long v, unsigned long *a)
+{
+ u16 *p = (u16 *) a;
+ u16 l = v & 0xffff;
+ u16 h = v >> 16;
- bpp = bpp_tab[(display>>2)&7];
- e1355_bpp_to_var(bpp, var);
+ fb_writew(l, p);
+ fb_writew(h, p + 1);
+}
- crt_enabled = (display & 0x02) != 0;
- lcd_enabled = (display & 0x02) != 0;
+static inline unsigned long epson1355fb_fb_readl(const unsigned long *a)
+{
+ const u16 *p = (u16 *) a;
+ u16 l = fb_readw(p);
+ u16 h = fb_readw(p + 1);
- hw_bpp = width[is_tft][(panel>>4)&3];
+ return (h << 16) | l;
+}
- xres = e1355_read_reg(0x04) + 1;
- yres = e1355_read_reg16(0x08) + 1;
-
- xres *= 8;
- /* talk about weird hardware .. */
- yres *= (is_dual && !crt_enabled) ? 2 : 1;
+#define FB_READL epson1355fb_fb_readl
+#define FB_WRITEL epson1355fb_fb_writel
- xres_virtual = e1355_read_reg16(0x16);
- /* it's in 2-byte words initially */
- xres_virtual *= 16;
- xres_virtual /= var->bits_per_pixel;
+/* ------------------------------------------------------------------------- */
- var->xres = xres;
- var->yres = yres;
- var->xres_virtual = xres_virtual;
- var->yres_virtual = yres;
+static inline unsigned long copy_from_user16(void *to, const void *from,
+ unsigned long n)
+{
+ u16 *dst = (u16 *) to;
+ u16 *src = (u16 *) from;
- var->xoffset = var->yoffset = 0;
+ if (!access_ok(VERIFY_READ, from, n))
+ return n;
- var->grayscale = !is_color;
-
- return 0;
-}
+ while (n > 1) {
+ u16 v;
+ if (__get_user(v, src))
+ return n;
-#define is_dual(panel) (((panel)&3)==2)
+ fb_writew(v, dst);
-static void get_panel_data(struct e1355_par *par)
-{
- u8 panel;
- int width[2][4] = { { 4, 8, 16, -1 }, { 9, 12, 16, -1 } };
+ src++, dst++;
+ n -= 2;
+ }
- panel = e1355_read_reg(E1355_PANEL);
+ if (n) {
+ u8 v;
- par->panel_width = width[panel&1][(panel>>4)&3];
- par->panel_xres = (e1355_read_reg(0x04) + 1) * 8;
- par->panel_ymul = is_dual(panel) ? 2 : 1;
- par->panel_yres = ((e1355_read_reg16(0x08) + 1)
- * par->panel_ymul);
+ if (__get_user(v, ((u8 *) src)))
+ return n;
+
+ fb_writeb(v, dst);
+ }
+ return 0;
}
-static void e1355_get_par(void *raw_par, struct fb_info_gen *info)
+static inline unsigned long copy_to_user16(void *to, const void *from,
+ unsigned long n)
{
- struct e1355_par *par = raw_par;
+ u16 *dst = (u16 *) to;
+ u16 *src = (u16 *) from;
- get_panel_data(par);
-}
+ if (!access_ok(VERIFY_WRITE, to, n))
+ return n;
-static void e1355_set_par(const void *par, struct fb_info_gen *info)
-{
-}
+ while (n > 1) {
+ u16 v = fb_readw(src);
-static int e1355_getcolreg(unsigned regno, unsigned *red, unsigned *green,
- unsigned *blue, unsigned *transp,
- struct fb_info *info)
-{
- u8 r, g, b;
+ if (__put_user(v, dst))
+ return n;
- e1355_write_reg(regno, E1355_LUT_INDEX);
- r = e1355_read_reg(E1355_LUT_DATA);
- g = e1355_read_reg(E1355_LUT_DATA);
- b = e1355_read_reg(E1355_LUT_DATA);
+ src++, dst++;
+ n -= 2;
+ }
- *red = r << 8;
- *green = g << 8;
- *blue = b << 8;
+ if (n) {
+ u8 v = fb_readb(src);
+ if (__put_user(v, ((u8 *) dst)))
+ return n;
+ }
return 0;
}
-static int e1355fb_setcolreg(unsigned regno, unsigned red, unsigned green,
- unsigned blue, unsigned transp,
- struct fb_info *info)
+
+static ssize_t
+epson1355fb_read(struct file *file, char *buf, size_t count, loff_t * ppos)
{
- u8 r = (red >> 8) & 0xf0;
- u8 g = (green>>8) & 0xf0;
- u8 b = (blue>> 8) & 0xf0;
-
- e1355_write_reg(regno, E1355_LUT_INDEX);
- e1355_write_reg(r, E1355_LUT_DATA);
- e1355_write_reg(g, E1355_LUT_DATA);
- e1355_write_reg(b, E1355_LUT_DATA);
-
- return 0;
+ struct inode *inode = file->f_dentry->d_inode;
+ int fbidx = iminor(inode);
+ struct fb_info *info = registered_fb[fbidx];
+ unsigned long p = *ppos;
+
+ /* from fbmem.c except for our own copy_*_user */
+ if (!info || !info->screen_base)
+ return -ENODEV;
+
+ if (p >= info->fix.smem_len)
+ return 0;
+ if (count >= info->fix.smem_len)
+ count = info->fix.smem_len;
+ if (count + p > info->fix.smem_len)
+ count = info->fix.smem_len - p;
+
+ if (count) {
+ char *base_addr;
+
+ base_addr = info->screen_base;
+ count -= copy_to_user16(buf, base_addr + p, count);
+ if (!count)
+ return -EFAULT;
+ *ppos += count;
+ }
+ return count;
}
-static int e1355_pan_display(const struct fb_var_screeninfo *var,
- struct fb_info_gen *info)
+static ssize_t
+epson1355fb_write(struct file *file, const char *buf,
+ size_t count, loff_t * ppos)
{
- BUG();
-
- return -EINVAL;
-}
+ struct inode *inode = file->f_dentry->d_inode;
+ int fbidx = iminor(inode);
+ struct fb_info *info = registered_fb[fbidx];
+ unsigned long p = *ppos;
+ int err;
+
+ /* from fbmem.c except for our own copy_*_user */
+ if (!info || !info->screen_base)
+ return -ENODEV;
+
+ /* from fbmem.c except for our own copy_*_user */
+ if (p > info->fix.smem_len)
+ return -ENOSPC;
+ if (count >= info->fix.smem_len)
+ count = info->fix.smem_len;
+ err = 0;
+ if (count + p > info->fix.smem_len) {
+ count = info->fix.smem_len - p;
+ err = -ENOSPC;
+ }
-/*
- * The AERO_HACKS parts disable/enable the backlight on the Compaq Aero 8000.
- * I'm not sure they aren't dangerous to the hardware, so be warned.
- */
-#undef AERO_HACKS
+ if (count) {
+ char *base_addr;
-static int e1355_blank(int blank_mode, struct fb_info_gen *info)
-{
- u8 disp;
+ base_addr = info->screen_base;
+ count -= copy_from_user16(base_addr + p, buf, count);
+ *ppos += count;
+ err = -EFAULT;
+ }
+ if (count)
+ return count;
+ return err;
+}
- switch (blank_mode) {
- case VESA_NO_BLANKING:
- disp = e1355_read_reg(E1355_DISPLAY);
- disp |= 1;
- e1355_write_reg(disp, E1355_DISPLAY);
-
-#ifdef AERO_HACKS
- e1355_write_reg(0x6, 0x20);
-#endif
- break;
+/* ------------------------------------------------------------------------- */
+
+static struct fb_ops epson1355fb_fbops = {
+ .owner = THIS_MODULE,
+ .fb_setcolreg = epson1355fb_setcolreg,
+ .fb_pan_display = epson1355fb_pan_display,
+ .fb_blank = epson1355fb_blank,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+ .fb_read = epson1355fb_read,
+ .fb_write = epson1355fb_write,
+ .fb_cursor = soft_cursor,
+};
- case VESA_VSYNC_SUSPEND:
- case VESA_HSYNC_SUSPEND:
- case VESA_POWERDOWN:
- disp = e1355_read_reg(E1355_DISPLAY);
- disp &= ~1;
- e1355_write_reg(disp, E1355_DISPLAY);
+/* ------------------------------------------------------------------------- */
-#ifdef AERO_HACKS
- e1355_write_reg(0x0, 0x20);
-#endif
- break;
+static __init unsigned int get_fb_size(struct fb_info *info)
+{
+ unsigned int size = 2 * 1024 * 1024;
+ char *p = info->screen_base;
- default:
- return -EINVAL;
- }
+ /* the 512k framebuffer is aliased at start + 0x80000 * n */
+ fb_writeb(1, p);
+ fb_writeb(0, p + 0x80000);
+ if (!fb_readb(p))
+ size = 512 * 1024;
- return 0;
+ fb_writeb(0, p);
+
+ return size;
}
-static struct display_switch e1355_dispsw;
+static int epson1355_width_tab[2][4] __initdata =
+ { {4, 8, 16, -1}, {9, 12, 16, -1} };
+static int epson1355_bpp_tab[8] __initdata = { 1, 2, 4, 8, 15, 16 };
-static void e1355_set_disp(const void *unused, struct display *disp,
- struct fb_info_gen *info)
+static void __init fetch_hw_state(struct fb_info *info, struct epson1355_par *par)
{
- struct display_switch *d;
+ struct fb_var_screeninfo *var = &info->var;
+ struct fb_fix_screeninfo *fix = &info->fix;
+ u8 panel, display;
+ u16 offset;
+ u32 xres, yres;
+ u32 xres_virtual, yres_virtual;
+ int bpp, lcd_bpp;
+ int is_color, is_dual, is_tft;
+ int lcd_enabled, crt_enabled;
- disp->dispsw = &e1355_dispsw;
-
- switch(disp->var.bits_per_pixel) {
-#ifdef FBCON_HAS_MFB
- case 1:
- d = &fbcon_mfb; break;
-#endif
-#ifdef FBCON_HAS_CFB8
+ fix->type = FB_TYPE_PACKED_PIXELS;
+
+ display = epson1355_read_reg(par, REG_DISPLAY_MODE);
+ bpp = epson1355_bpp_tab[(display >> 2) & 7];
+
+ switch (bpp) {
case 8:
- d = &fbcon_cfb8; break;
-#endif
+ fix->visual = FB_VISUAL_PSEUDOCOLOR;
+ var->bits_per_pixel = 8;
+ var->red.offset = var->green.offset = var->blue.offset = 0;
+ var->red.length = var->green.length = var->blue.length = 8;
+ break;
+ case 16:
+ /* 5-6-5 RGB */
+ fix->visual = FB_VISUAL_TRUECOLOR;
+ var->bits_per_pixel = 16;
+ var->red.offset = 11;
+ var->red.length = 5;
+ var->green.offset = 5;
+ var->green.length = 6;
+ var->blue.offset = 0;
+ var->blue.length = 5;
+ break;
default:
- BUG(); break;
+ BUG();
}
+ fb_alloc_cmap(&(info->cmap), 256, 0);
- memcpy(&e1355_dispsw, d, sizeof *d);
+ panel = epson1355_read_reg(par, REG_PANEL_TYPE);
+ is_color = (panel & 0x04) != 0;
+ is_dual = (panel & 0x02) != 0;
+ is_tft = (panel & 0x01) != 0;
+ crt_enabled = (display & 0x02) != 0;
+ lcd_enabled = (display & 0x01) != 0;
+ lcd_bpp = epson1355_width_tab[is_tft][(panel >> 4) & 3];
- /* reading is terribly slow for us */
-#if 0 /* XXX: need to work out why this doesn't work */
- e1355_dispsw.bmove = fbcon_redraw_bmove;
-#endif
-}
+ xres = (epson1355_read_reg(par, REG_HORZ_DISP_WIDTH) + 1) * 8;
+ yres = (epson1355_read_reg16(par, REG_VERT_DISP_HEIGHT0) + 1) *
+ ((is_dual && !crt_enabled) ? 2 : 1);
+ offset = epson1355_read_reg16(par, REG_MEM_ADDR_OFFSET0) & 0x7ff;
+ xres_virtual = offset * 16 / bpp;
+ yres_virtual = fix->smem_len / (offset * 2);
-/* ------------ Interfaces to hardware functions ------------ */
+ var->xres = xres;
+ var->yres = yres;
+ var->xres_virtual = xres_virtual;
+ var->yres_virtual = yres_virtual;
+ var->xoffset = var->yoffset = 0;
+ fix->line_length = offset * 2;
-struct fbgen_hwswitch e1355_switch = {
- .detect = e1355_detect,
- .encode_fix = e1355_encode_fix,
- .decode_var = e1355_decode_var,
- .encode_var = e1355_encode_var,
- .get_par = e1355_get_par,
- .set_par = e1355_set_par,
- .getcolreg = e1355_getcolreg,
- .pan_display = e1355_pan_display,
- .blank = e1355_blank,
- .set_disp = e1355_set_disp,
-};
+ fix->xpanstep = 0; /* no pan yet */
+ fix->ypanstep = 1;
+ fix->ywrapstep = 0;
+ fix->accel = FB_ACCEL_NONE;
+
+ var->grayscale = !is_color;
+#ifdef DEBUG
+ printk(KERN_INFO
+ "epson1355fb: xres=%d, yres=%d, "
+ "is_color=%d, is_dual=%d, is_tft=%d\n",
+ xres, yres, is_color, is_dual, is_tft);
+ printk(KERN_INFO
+ "epson1355fb: bpp=%d, lcd_bpp=%d, "
+ "crt_enabled=%d, lcd_enabled=%d\n",
+ bpp, lcd_bpp, crt_enabled, lcd_enabled);
+#endif
+}
-/* ------------ Hardware Independent Functions ------------ */
+static void clearfb16(struct fb_info *info)
+{
+ u16 *dst = (u16 *) info->screen_base;
+ unsigned long n = info->fix.smem_len;
-static struct fb_ops e1355fb_ops = {
- .owner = THIS_MODULE,
- .fb_get_fix = fbgen_get_fix,
- .fb_get_var = fbgen_get_var,
- .fb_set_var = fbgen_set_var,
- .fb_get_cmap = fbgen_get_cmap,
- .fb_set_cmap = gen_set_cmap,
- .fb_setcolreg = e1355fb_setcolreg,
- .fb_pan_display =fbgen_pan_display,
- .fb_blank = fbgen_blank,
-};
+ while (n > 1) {
+ fb_writew(0, dst);
+ dst++, n -= 2;
+ }
-static struct e1355fb_info fb_info;
+ if (n)
+ fb_writeb(0, dst);
+}
-int __init e1355fb_setup(char *str)
+static void epson1355fb_platform_release(struct device *device)
{
- return 0;
}
-int __init e1355fb_init(void)
+static int epson1355fb_remove(struct device *device)
{
- fb_info.gen.fbhw = &e1355_switch;
- fb_info.gen.fbhw->detect();
- strcpy(fb_info.gen.info.modename, "SED1355");
- fb_info.gen.info.changevar = NULL;
- fb_info.gen.info.fbops = &e1355fb_ops;
- fb_info.gen.info.screen_base = (void *)E1355_FB_BASE;
- fb_info.gen.currcon = -1;
- fb_info.gen.info.disp = &disp;
- fb_info.gen.parsize = sizeof(struct e1355_par);
- fb_info.gen.info.switch_con = &fbgen_switch;
- fb_info.gen.info.updatevar = &fbgen_update_var;
- fb_info.gen.info.flags = FBINFO_FLAG_DEFAULT;
- /* This should give a reasonable default video mode */
- fbgen_get_var(&disp.var, -1, &fb_info.gen.info);
- fbgen_do_set_var(&disp.var, 1, &fb_info.gen);
- fbgen_set_disp(-1, &fb_info.gen);
- if (disp.var.bits_per_pixel > 1)
- do_install_cmap(0, &fb_info.gen);
- if (register_framebuffer(&fb_info.gen.info) < 0)
- return -EINVAL;
- printk(KERN_INFO "fb%d: %s frame buffer device\n", fb_info.gen.info.node,
- fb_info.gen.info.modename);
+ struct fb_info *info = dev_get_drvdata(device);
+ struct epson1355_par *par = info->par;
+
+ backlight_enable(0);
+ if (par) {
+ lcd_enable(par, 0);
+ if (par && par->reg_addr)
+ iounmap((void *) par->reg_addr);
+ }
+ if (info) {
+ fb_dealloc_cmap(&info->cmap);
+ if (info->screen_base)
+ iounmap(info->screen_base);
+ framebuffer_release(info);
+ }
+ release_mem_region(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN);
+ release_mem_region(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN);
return 0;
}
+int __init epson1355fb_probe(struct device *device)
+{
+ struct platform_device *dev = to_platform_device(device);
+ struct epson1355_par *default_par;
+ struct fb_info *info;
+ u8 revision;
+ int rc = 0;
+
+ if (!request_mem_region(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN, "S1D13505 registers")) {
+ printk(KERN_ERR "epson1355fb: unable to reserve "
+ "registers at 0x%0x\n", EPSON1355FB_REGS_PHYS);
+ rc = -EBUSY;
+ goto bail;
+ }
+
+ if (!request_mem_region(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN,
+ "S1D13505 framebuffer")) {
+ printk(KERN_ERR "epson1355fb: unable to reserve "
+ "framebuffer at 0x%0x\n", EPSON1355FB_FB_PHYS);
+ rc = -EBUSY;
+ goto bail;
+ }
- /*
- * Cleanup
- */
+ info = framebuffer_alloc(sizeof(struct epson1355_par) + sizeof(u32) * 256, &dev->dev);
+ if (!info)
+ rc = -ENOMEM;
+ goto bail;
+
+ default_par = info->par;
+ default_par->reg_addr = (unsigned long) ioremap(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN);
+ if (!default_par->reg_addr) {
+ printk(KERN_ERR "epson1355fb: unable to map registers\n");
+ rc = -ENOMEM;
+ goto bail;
+ }
+ info->pseudo_palette = (void *)(default_par + 1);
-void e1355fb_cleanup(struct fb_info *info)
-{
+ info->screen_base = ioremap(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN);
+ if (!info->screen_base) {
+ printk(KERN_ERR "epson1355fb: unable to map framebuffer\n");
+ rc = -ENOMEM;
+ goto bail;
+ }
+
+ revision = epson1355_read_reg(default_par, REG_REVISION_CODE);
+ if ((revision >> 2) != 3) {
+ printk(KERN_INFO "epson1355fb: epson1355 not found\n");
+ rc = -ENODEV;
+ goto bail;
+ }
+
+ info->fix.mmio_start = EPSON1355FB_REGS_PHYS;
+ info->fix.mmio_len = EPSON1355FB_REGS_LEN;
+ info->fix.smem_start = EPSON1355FB_FB_PHYS;
+ info->fix.smem_len = get_fb_size(info);
+
+ printk(KERN_INFO "epson1355fb: regs mapped at 0x%lx, fb %d KiB mapped at 0x%p\n",
+ default_par->reg_addr, info->fix.smem_len / 1024, info->screen_base);
+
+ strcpy(info->fix.id, "S1D13505");
+ info->par = default_par;
+ info->fbops = &epson1355fb_fbops;
+ info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
+
+ /* we expect the boot loader to have initialized the chip
+ with appropriate parameters from which we can determinte
+ the flavor of lcd panel attached */
+ fetch_hw_state(info, default_par);
+
+ /* turn this puppy on ... */
+ clearfb16(info);
+ backlight_enable(1);
+ lcd_enable(default_par, 1);
+
+ if (register_framebuffer(info) < 0) {
+ rc = -EINVAL;
+ goto bail;
+ }
/*
- * If your driver supports multiple boards, you should unregister and
- * clean up all instances.
+ * Our driver data.
*/
+ dev_set_drvdata(&dev->dev, info);
+
+ printk(KERN_INFO "fb%d: %s frame buffer device\n",
+ info->node, info->fix.id);
+
+ return 0;
+
+ bail:
+ epson1355fb_remove(device);
+ return rc;
+}
+
+static struct device_driver epson1355fb_driver = {
+ .name = "epson1355fb",
+ .bus = &platform_bus_type,
+ .probe = epson1355fb_probe,
+ .remove = epson1355fb_remove,
+};
+
+static struct platform_device epson1355fb_device = {
+ .name = "epson1355fb",
+ .id = 0,
+ .dev = {
+ .release = epson1355fb_platform_release,
+ }
+};
+
+int __init epson1355fb_init(void)
+{
+ int ret = 0;
+
+ if (fb_get_options("epson1355fb", NULL))
+ return -ENODEV;
+
+ ret = driver_register(&epson1355fb_driver);
+ if (!ret) {
+ ret = platform_device_register(&epson1355fb_device);
+ if (ret)
+ driver_unregister(&epson1355fb_driver);
+ }
+ return ret;
+}
+
+module_init(epson1355fb_init);
- unregister_framebuffer(info);
- /* ... */
+#ifdef MODULE
+static void __exit epson1355fb_exit(void)
+{
+ platform_device_unregister(&epson1355fb_device);
+ driver_unregister(&epson1355fb_driver);
}
+/* ------------------------------------------------------------------------- */
+
+module_exit(epson1355fb_exit);
+#endif
+
+MODULE_AUTHOR("Christopher Hoover <ch@hpl.hp.com>");
+MODULE_DESCRIPTION("Framebuffer driver for Epson S1D13505");
MODULE_LICENSE("GPL");
git://git.onelab.eu / linux-2.6.git / blobdiff