diff options
Diffstat (limited to 'drivers/video/chipsfb.c')
| -rw-r--r-- | drivers/video/chipsfb.c | 522 |
1 files changed, 522 insertions, 0 deletions
diff --git a/drivers/video/chipsfb.c b/drivers/video/chipsfb.c new file mode 100644 index 00000000000..ab98f225fe3 --- /dev/null +++ b/drivers/video/chipsfb.c @@ -0,0 +1,522 @@ +/* + * drivers/video/chipsfb.c -- frame buffer device for + * Chips & Technologies 65550 chip. + * + * Copyright (C) 1998-2002 Paul Mackerras + * + * This file is derived from the Powermac "chips" driver: + * Copyright (C) 1997 Fabio Riccardi. + * And from the frame buffer device for Open Firmware-initialized devices: + * Copyright (C) 1997 Geert Uytterhoeven. + * + * 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. + */ + +#include <linux/config.h> +#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/vmalloc.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/fb.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <asm/io.h> + +#ifdef CONFIG_PMAC_BACKLIGHT +#include <asm/backlight.h> +#endif +#ifdef CONFIG_PMAC_PBOOK +#include <linux/adb.h> +#include <linux/pmu.h> +#endif + +/* + * Since we access the display with inb/outb to fixed port numbers, + * we can only handle one 6555x chip. -- paulus + */ +static struct fb_info chipsfb_info; + +#define write_ind(num, val, ap, dp) do { \ + outb((num), (ap)); outb((val), (dp)); \ +} while (0) +#define read_ind(num, var, ap, dp) do { \ + outb((num), (ap)); var = inb((dp)); \ +} while (0) + +/* extension registers */ +#define write_xr(num, val) write_ind(num, val, 0x3d6, 0x3d7) +#define read_xr(num, var) read_ind(num, var, 0x3d6, 0x3d7) +/* flat panel registers */ +#define write_fr(num, val) write_ind(num, val, 0x3d0, 0x3d1) +#define read_fr(num, var) read_ind(num, var, 0x3d0, 0x3d1) +/* CRTC registers */ +#define write_cr(num, val) write_ind(num, val, 0x3d4, 0x3d5) +#define read_cr(num, var) read_ind(num, var, 0x3d4, 0x3d5) +/* graphics registers */ +#define write_gr(num, val) write_ind(num, val, 0x3ce, 0x3cf) +#define read_gr(num, var) read_ind(num, var, 0x3ce, 0x3cf) +/* sequencer registers */ +#define write_sr(num, val) write_ind(num, val, 0x3c4, 0x3c5) +#define read_sr(num, var) read_ind(num, var, 0x3c4, 0x3c5) +/* attribute registers - slightly strange */ +#define write_ar(num, val) do { \ + inb(0x3da); write_ind(num, val, 0x3c0, 0x3c0); \ +} while (0) +#define read_ar(num, var) do { \ + inb(0x3da); read_ind(num, var, 0x3c0, 0x3c1); \ +} while (0) + +#ifdef CONFIG_PMAC_PBOOK +static unsigned char *save_framebuffer; +int chips_sleep_notify(struct pmu_sleep_notifier *self, int when); +static struct pmu_sleep_notifier chips_sleep_notifier = { + chips_sleep_notify, SLEEP_LEVEL_VIDEO, +}; +#endif + +/* + * Exported functions + */ +int chips_init(void); + +static int chipsfb_pci_init(struct pci_dev *dp, const struct pci_device_id *); +static int chipsfb_check_var(struct fb_var_screeninfo *var, + struct fb_info *info); +static int chipsfb_set_par(struct fb_info *info); +static int chipsfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, + u_int transp, struct fb_info *info); +static int chipsfb_blank(int blank, struct fb_info *info); + +static struct fb_ops chipsfb_ops = { + .owner = THIS_MODULE, + .fb_check_var = chipsfb_check_var, + .fb_set_par = chipsfb_set_par, + .fb_setcolreg = chipsfb_setcolreg, + .fb_blank = chipsfb_blank, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_cursor = soft_cursor, +}; + +static int chipsfb_check_var(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + if (var->xres > 800 || var->yres > 600 + || var->xres_virtual > 800 || var->yres_virtual > 600 + || (var->bits_per_pixel != 8 && var->bits_per_pixel != 16) + || var->nonstd + || (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED) + return -EINVAL; + + var->xres = var->xres_virtual = 800; + var->yres = var->yres_virtual = 600; + + return 0; +} + +static int chipsfb_set_par(struct fb_info *info) +{ + if (info->var.bits_per_pixel == 16) { + write_cr(0x13, 200); // Set line length (doublewords) + write_xr(0x81, 0x14); // 15 bit (555) color mode + write_xr(0x82, 0x00); // Disable palettes + write_xr(0x20, 0x10); // 16 bit blitter mode + + info->fix.line_length = 800*2; + info->fix.visual = FB_VISUAL_TRUECOLOR; + + info->var.red.offset = 10; + info->var.green.offset = 5; + info->var.blue.offset = 0; + info->var.red.length = info->var.green.length = + info->var.blue.length = 5; + + } else { + /* p->var.bits_per_pixel == 8 */ + write_cr(0x13, 100); // Set line length (doublewords) + write_xr(0x81, 0x12); // 8 bit color mode + write_xr(0x82, 0x08); // Graphics gamma enable + write_xr(0x20, 0x00); // 8 bit blitter mode + + info->fix.line_length = 800; + info->fix.visual = FB_VISUAL_PSEUDOCOLOR; + + info->var.red.offset = info->var.green.offset = + info->var.blue.offset = 0; + info->var.red.length = info->var.green.length = + info->var.blue.length = 8; + + } + return 0; +} + +static int chipsfb_blank(int blank, struct fb_info *info) +{ +#ifdef CONFIG_PMAC_BACKLIGHT + // used to disable backlight only for blank > 1, but it seems + // useful at blank = 1 too (saves battery, extends backlight life) + set_backlight_enable(!blank); +#endif /* CONFIG_PMAC_BACKLIGHT */ + + return 1; /* get fb_blank to set the colormap to all black */ +} + +static int chipsfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, + u_int transp, struct fb_info *info) +{ + if (regno > 255) + return 1; + red >>= 8; + green >>= 8; + blue >>= 8; + outb(regno, 0x3c8); + udelay(1); + outb(red, 0x3c9); + outb(green, 0x3c9); + outb(blue, 0x3c9); + + return 0; +} + +struct chips_init_reg { + unsigned char addr; + unsigned char data; +}; + +#define N_ELTS(x) (sizeof(x) / sizeof(x[0])) + +static struct chips_init_reg chips_init_sr[] = { + { 0x00, 0x03 }, + { 0x01, 0x01 }, + { 0x02, 0x0f }, + { 0x04, 0x0e } +}; + +static struct chips_init_reg chips_init_gr[] = { + { 0x05, 0x00 }, + { 0x06, 0x0d }, + { 0x08, 0xff } +}; + +static struct chips_init_reg chips_init_ar[] = { + { 0x10, 0x01 }, + { 0x12, 0x0f }, + { 0x13, 0x00 } +}; + +static struct chips_init_reg chips_init_cr[] = { + { 0x00, 0x7f }, + { 0x01, 0x63 }, + { 0x02, 0x63 }, + { 0x03, 0x83 }, + { 0x04, 0x66 }, + { 0x05, 0x10 }, + { 0x06, 0x72 }, + { 0x07, 0x3e }, + { 0x08, 0x00 }, + { 0x09, 0x40 }, + { 0x0c, 0x00 }, + { 0x0d, 0x00 }, + { 0x10, 0x59 }, + { 0x11, 0x0d }, + { 0x12, 0x57 }, + { 0x13, 0x64 }, + { 0x14, 0x00 }, + { 0x15, 0x57 }, + { 0x16, 0x73 }, + { 0x17, 0xe3 }, + { 0x18, 0xff }, + { 0x30, 0x02 }, + { 0x31, 0x02 }, + { 0x32, 0x02 }, + { 0x33, 0x02 }, + { 0x40, 0x00 }, + { 0x41, 0x00 }, + { 0x40, 0x80 } +}; + +static struct chips_init_reg chips_init_fr[] = { + { 0x01, 0x02 }, + { 0x03, 0x08 }, + { 0x04, 0x81 }, + { 0x05, 0x21 }, + { 0x08, 0x0c }, + { 0x0a, 0x74 }, + { 0x0b, 0x11 }, + { 0x10, 0x0c }, + { 0x11, 0xe0 }, + /* { 0x12, 0x40 }, -- 3400 needs 40, 2400 needs 48, no way to tell */ + { 0x20, 0x63 }, + { 0x21, 0x68 }, + { 0x22, 0x19 }, + { 0x23, 0x7f }, + { 0x24, 0x68 }, + { 0x26, 0x00 }, + { 0x27, 0x0f }, + { 0x30, 0x57 }, + { 0x31, 0x58 }, + { 0x32, 0x0d }, + { 0x33, 0x72 }, + { 0x34, 0x02 }, + { 0x35, 0x22 }, + { 0x36, 0x02 }, + { 0x37, 0x00 } +}; + +static struct chips_init_reg chips_init_xr[] = { + { 0xce, 0x00 }, /* set default memory clock */ + { 0xcc, 0x43 }, /* memory clock ratio */ + { 0xcd, 0x18 }, + { 0xce, 0xa1 }, + { 0xc8, 0x84 }, + { 0xc9, 0x0a }, + { 0xca, 0x00 }, + { 0xcb, 0x20 }, + { 0xcf, 0x06 }, + { 0xd0, 0x0e }, + { 0x09, 0x01 }, + { 0x0a, 0x02 }, + { 0x0b, 0x01 }, + { 0x20, 0x00 }, + { 0x40, 0x03 }, + { 0x41, 0x01 }, + { 0x42, 0x00 }, + { 0x80, 0x82 }, + { 0x81, 0x12 }, + { 0x82, 0x08 }, + { 0xa0, 0x00 }, + { 0xa8, 0x00 } +}; + +static void __init chips_hw_init(void) +{ + int i; + + for (i = 0; i < N_ELTS(chips_init_xr); ++i) + write_xr(chips_init_xr[i].addr, chips_init_xr[i].data); + outb(0x29, 0x3c2); /* set misc output reg */ + for (i = 0; i < N_ELTS(chips_init_sr); ++i) + write_sr(chips_init_sr[i].addr, chips_init_sr[i].data); + for (i = 0; i < N_ELTS(chips_init_gr); ++i) + write_gr(chips_init_gr[i].addr, chips_init_gr[i].data); + for (i = 0; i < N_ELTS(chips_init_ar); ++i) + write_ar(chips_init_ar[i].addr, chips_init_ar[i].data); + for (i = 0; i < N_ELTS(chips_init_cr); ++i) + write_cr(chips_init_cr[i].addr, chips_init_cr[i].data); + for (i = 0; i < N_ELTS(chips_init_fr); ++i) + write_fr(chips_init_fr[i].addr, chips_init_fr[i].data); +} + +static struct fb_fix_screeninfo chipsfb_fix __initdata = { + .id = "C&T 65550", + .type = FB_TYPE_PACKED_PIXELS, + .visual = FB_VISUAL_PSEUDOCOLOR, + .accel = FB_ACCEL_NONE, + .line_length = 800, + +// FIXME: Assumes 1MB frame buffer, but 65550 supports 1MB or 2MB. +// * "3500" PowerBook G3 (the original PB G3) has 2MB. +// * 2400 has 1MB composed of 2 Mitsubishi M5M4V4265CTP DRAM chips. +// Motherboard actually supports 2MB -- there are two blank locations +// for a second pair of DRAMs. (Thanks, Apple!) +// * 3400 has 1MB (I think). Don't know if it's expandable. +// -- Tim Seufert + .smem_len = 0x100000, /* 1MB */ +}; + +static struct fb_var_screeninfo chipsfb_var __initdata = { + .xres = 800, + .yres = 600, + .xres_virtual = 800, + .yres_virtual = 600, + .bits_per_pixel = 8, + .red = { .length = 8 }, + .green = { .length = 8 }, + .blue = { .length = 8 }, + .height = -1, + .width = -1, + .vmode = FB_VMODE_NONINTERLACED, + .pixclock = 10000, + .left_margin = 16, + .right_margin = 16, + .upper_margin = 16, + .lower_margin = 16, + .hsync_len = 8, + .vsync_len = 8, +}; + +static void __init init_chips(struct fb_info *p, unsigned long addr) +{ + p->fix = chipsfb_fix; + p->fix.smem_start = addr; + + p->var = chipsfb_var; + + p->fbops = &chipsfb_ops; + p->flags = FBINFO_DEFAULT; + + fb_alloc_cmap(&p->cmap, 256, 0); + + if (register_framebuffer(p) < 0) { + printk(KERN_ERR "C&T 65550 framebuffer failed to register\n"); + return; + } + + printk(KERN_INFO "fb%d: Chips 65550 frame buffer (%dK RAM detected)\n", + p->node, p->fix.smem_len / 1024); + + chips_hw_init(); +} + +static int __devinit +chipsfb_pci_init(struct pci_dev *dp, const struct pci_device_id *ent) +{ + struct fb_info *p = &chipsfb_info; + unsigned long addr, size; + unsigned short cmd; + + if ((dp->resource[0].flags & IORESOURCE_MEM) == 0) + return -ENODEV; + addr = pci_resource_start(dp, 0); + size = pci_resource_len(dp, 0); + if (addr == 0) + return -ENODEV; + if (p->screen_base != 0) + return -EBUSY; + if (!request_mem_region(addr, size, "chipsfb")) + return -EBUSY; + +#ifdef __BIG_ENDIAN + addr += 0x800000; // Use big-endian aperture +#endif + + /* we should use pci_enable_device here, but, + the device doesn't declare its I/O ports in its BARs + so pci_enable_device won't turn on I/O responses */ + pci_read_config_word(dp, PCI_COMMAND, &cmd); + cmd |= 3; /* enable memory and IO space */ + pci_write_config_word(dp, PCI_COMMAND, cmd); + +#ifdef CONFIG_PMAC_BACKLIGHT + /* turn on the backlight */ + set_backlight_enable(1); +#endif /* CONFIG_PMAC_BACKLIGHT */ + + p->screen_base = __ioremap(addr, 0x200000, _PAGE_NO_CACHE); + if (p->screen_base == NULL) { + release_mem_region(addr, size); + return -ENOMEM; + } + p->device = &dp->dev; + init_chips(p, addr); + +#ifdef CONFIG_PMAC_PBOOK + pmu_register_sleep_notifier(&chips_sleep_notifier); +#endif /* CONFIG_PMAC_PBOOK */ + + /* Clear the entire framebuffer */ + memset(p->screen_base, 0, 0x100000); + + pci_set_drvdata(dp, p); + return 0; +} + +static void __devexit chipsfb_remove(struct pci_dev *dp) +{ + struct fb_info *p = pci_get_drvdata(dp); + + if (p != &chipsfb_info || p->screen_base == NULL) + return; + unregister_framebuffer(p); + iounmap(p->screen_base); + p->screen_base = NULL; + release_mem_region(pci_resource_start(dp, 0), pci_resource_len(dp, 0)); + +#ifdef CONFIG_PMAC_PBOOK + pmu_unregister_sleep_notifier(&chips_sleep_notifier); +#endif /* CONFIG_PMAC_PBOOK */ +} + +static struct pci_device_id chipsfb_pci_tbl[] = { + { PCI_VENDOR_ID_CT, PCI_DEVICE_ID_CT_65550, PCI_ANY_ID, PCI_ANY_ID }, + { 0 } +}; + +MODULE_DEVICE_TABLE(pci, chipsfb_pci_tbl); + +static struct pci_driver chipsfb_driver = { + .name = "chipsfb", + .id_table = chipsfb_pci_tbl, + .probe = chipsfb_pci_init, + .remove = __devexit_p(chipsfb_remove), +}; + +int __init chips_init(void) +{ + if (fb_get_options("chipsfb", NULL)) + return -ENODEV; + + return pci_register_driver(&chipsfb_driver); +} + +module_init(chips_init); + +static void __exit chipsfb_exit(void) +{ + pci_unregister_driver(&chipsfb_driver); +} + +#ifdef CONFIG_PMAC_PBOOK +/* + * Save the contents of the frame buffer when we go to sleep, + * and restore it when we wake up again. + */ +int +chips_sleep_notify(struct pmu_sleep_notifier *self, int when) +{ + struct fb_info *p = &chipsfb_info; + int nb = p->var.yres * p->fix.line_length; + + if (p->screen_base == NULL) + return PBOOK_SLEEP_OK; + + switch (when) { + case PBOOK_SLEEP_REQUEST: + save_framebuffer = vmalloc(nb); + if (save_framebuffer == NULL) + return PBOOK_SLEEP_REFUSE; + break; + case PBOOK_SLEEP_REJECT: + if (save_framebuffer) { + vfree(save_framebuffer); + save_framebuffer = NULL; + } + break; + case PBOOK_SLEEP_NOW: + chipsfb_blank(1, p); + if (save_framebuffer) + memcpy(save_framebuffer, p->screen_base, nb); + break; + case PBOOK_WAKE: + if (save_framebuffer) { + memcpy(p->screen_base, save_framebuffer, nb); + vfree(save_framebuffer); + save_framebuffer = NULL; + } + chipsfb_blank(0, p); + break; + } + return PBOOK_SLEEP_OK; +} +#endif /* CONFIG_PMAC_PBOOK */ + +MODULE_LICENSE("GPL"); |