diff options
Diffstat (limited to 'drivers/video/pmagb-b-fb.c')
| -rw-r--r-- | drivers/video/pmagb-b-fb.c | 413 |
1 files changed, 0 insertions, 413 deletions
diff --git a/drivers/video/pmagb-b-fb.c b/drivers/video/pmagb-b-fb.c deleted file mode 100644 index 0822b6f8dddc..000000000000 --- a/drivers/video/pmagb-b-fb.c +++ /dev/null @@ -1,413 +0,0 @@ -/* - * linux/drivers/video/pmagb-b-fb.c - * - * PMAGB-B TURBOchannel Smart Frame Buffer (SFB) card support, - * derived from: - * "HP300 Topcat framebuffer support (derived from macfb of all things) - * Phil Blundell <philb@gnu.org> 1998", the original code can be - * found in the file hpfb.c in the same directory. - * - * DECstation related code Copyright (C) 1999, 2000, 2001 by - * Michael Engel <engel@unix-ag.org>, - * Karsten Merker <merker@linuxtag.org> and - * Harald Koerfgen. - * Copyright (c) 2005, 2006 Maciej W. Rozycki - * - * 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/compiler.h> -#include <linux/delay.h> -#include <linux/errno.h> -#include <linux/fb.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/tc.h> -#include <linux/types.h> - -#include <asm/io.h> - -#include <video/pmagb-b-fb.h> - - -struct pmagbbfb_par { - volatile void __iomem *mmio; - volatile void __iomem *smem; - volatile u32 __iomem *sfb; - volatile u32 __iomem *dac; - unsigned int osc0; - unsigned int osc1; - int slot; -}; - - -static struct fb_var_screeninfo pmagbbfb_defined = { - .bits_per_pixel = 8, - .red.length = 8, - .green.length = 8, - .blue.length = 8, - .activate = FB_ACTIVATE_NOW, - .height = -1, - .width = -1, - .accel_flags = FB_ACCEL_NONE, - .sync = FB_SYNC_ON_GREEN, - .vmode = FB_VMODE_NONINTERLACED, -}; - -static struct fb_fix_screeninfo pmagbbfb_fix = { - .id = "PMAGB-BA", - .smem_len = (2048 * 1024), - .type = FB_TYPE_PACKED_PIXELS, - .visual = FB_VISUAL_PSEUDOCOLOR, - .mmio_len = PMAGB_B_FBMEM, -}; - - -static inline void sfb_write(struct pmagbbfb_par *par, unsigned int reg, u32 v) -{ - writel(v, par->sfb + reg / 4); -} - -static inline u32 sfb_read(struct pmagbbfb_par *par, unsigned int reg) -{ - return readl(par->sfb + reg / 4); -} - -static inline void dac_write(struct pmagbbfb_par *par, unsigned int reg, u8 v) -{ - writeb(v, par->dac + reg / 4); -} - -static inline u8 dac_read(struct pmagbbfb_par *par, unsigned int reg) -{ - return readb(par->dac + reg / 4); -} - -static inline void gp0_write(struct pmagbbfb_par *par, u32 v) -{ - writel(v, par->mmio + PMAGB_B_GP0); -} - - -/* - * Set the palette. - */ -static int pmagbbfb_setcolreg(unsigned int regno, unsigned int red, - unsigned int green, unsigned int blue, - unsigned int transp, struct fb_info *info) -{ - struct pmagbbfb_par *par = info->par; - - if (regno >= info->cmap.len) - return 1; - - red >>= 8; /* The cmap fields are 16 bits */ - green >>= 8; /* wide, but the hardware colormap */ - blue >>= 8; /* registers are only 8 bits wide */ - - mb(); - dac_write(par, BT459_ADDR_LO, regno); - dac_write(par, BT459_ADDR_HI, 0x00); - wmb(); - dac_write(par, BT459_CMAP, red); - wmb(); - dac_write(par, BT459_CMAP, green); - wmb(); - dac_write(par, BT459_CMAP, blue); - - return 0; -} - -static struct fb_ops pmagbbfb_ops = { - .owner = THIS_MODULE, - .fb_setcolreg = pmagbbfb_setcolreg, - .fb_fillrect = cfb_fillrect, - .fb_copyarea = cfb_copyarea, - .fb_imageblit = cfb_imageblit, -}; - - -/* - * Turn the hardware cursor off. - */ -static void __init pmagbbfb_erase_cursor(struct fb_info *info) -{ - struct pmagbbfb_par *par = info->par; - - mb(); - dac_write(par, BT459_ADDR_LO, 0x00); - dac_write(par, BT459_ADDR_HI, 0x03); - wmb(); - dac_write(par, BT459_DATA, 0x00); -} - -/* - * Set up screen parameters. - */ -static void pmagbbfb_screen_setup(struct fb_info *info) -{ - struct pmagbbfb_par *par = info->par; - - info->var.xres = ((sfb_read(par, SFB_REG_VID_HOR) >> - SFB_VID_HOR_PIX_SHIFT) & SFB_VID_HOR_PIX_MASK) * 4; - info->var.xres_virtual = info->var.xres; - info->var.yres = (sfb_read(par, SFB_REG_VID_VER) >> - SFB_VID_VER_SL_SHIFT) & SFB_VID_VER_SL_MASK; - info->var.yres_virtual = info->var.yres; - info->var.left_margin = ((sfb_read(par, SFB_REG_VID_HOR) >> - SFB_VID_HOR_BP_SHIFT) & - SFB_VID_HOR_BP_MASK) * 4; - info->var.right_margin = ((sfb_read(par, SFB_REG_VID_HOR) >> - SFB_VID_HOR_FP_SHIFT) & - SFB_VID_HOR_FP_MASK) * 4; - info->var.upper_margin = (sfb_read(par, SFB_REG_VID_VER) >> - SFB_VID_VER_BP_SHIFT) & SFB_VID_VER_BP_MASK; - info->var.lower_margin = (sfb_read(par, SFB_REG_VID_VER) >> - SFB_VID_VER_FP_SHIFT) & SFB_VID_VER_FP_MASK; - info->var.hsync_len = ((sfb_read(par, SFB_REG_VID_HOR) >> - SFB_VID_HOR_SYN_SHIFT) & - SFB_VID_HOR_SYN_MASK) * 4; - info->var.vsync_len = (sfb_read(par, SFB_REG_VID_VER) >> - SFB_VID_VER_SYN_SHIFT) & SFB_VID_VER_SYN_MASK; - - info->fix.line_length = info->var.xres; -}; - -/* - * Determine oscillator configuration. - */ -static void pmagbbfb_osc_setup(struct fb_info *info) -{ - static unsigned int pmagbbfb_freqs[] = { - 130808, 119843, 104000, 92980, 74370, 72800, - 69197, 66000, 65000, 50350, 36000, 32000, 25175 - }; - struct pmagbbfb_par *par = info->par; - struct tc_bus *tbus = to_tc_dev(info->device)->bus; - u32 count0 = 8, count1 = 8, counttc = 16 * 256 + 8; - u32 freq0, freq1, freqtc = tc_get_speed(tbus) / 250; - int i, j; - - gp0_write(par, 0); /* select Osc0 */ - for (j = 0; j < 16; j++) { - mb(); - sfb_write(par, SFB_REG_TCCLK_COUNT, 0); - mb(); - for (i = 0; i < 100; i++) { /* nominally max. 20.5us */ - if (sfb_read(par, SFB_REG_TCCLK_COUNT) == 0) - break; - udelay(1); - } - count0 += sfb_read(par, SFB_REG_VIDCLK_COUNT); - } - - gp0_write(par, 1); /* select Osc1 */ - for (j = 0; j < 16; j++) { - mb(); - sfb_write(par, SFB_REG_TCCLK_COUNT, 0); - - for (i = 0; i < 100; i++) { /* nominally max. 20.5us */ - if (sfb_read(par, SFB_REG_TCCLK_COUNT) == 0) - break; - udelay(1); - } - count1 += sfb_read(par, SFB_REG_VIDCLK_COUNT); - } - - freq0 = (freqtc * count0 + counttc / 2) / counttc; - par->osc0 = freq0; - if (freq0 >= pmagbbfb_freqs[0] - (pmagbbfb_freqs[0] + 32) / 64 && - freq0 <= pmagbbfb_freqs[0] + (pmagbbfb_freqs[0] + 32) / 64) - par->osc0 = pmagbbfb_freqs[0]; - - freq1 = (par->osc0 * count1 + count0 / 2) / count0; - par->osc1 = freq1; - for (i = 0; i < ARRAY_SIZE(pmagbbfb_freqs); i++) - if (freq1 >= pmagbbfb_freqs[i] - - (pmagbbfb_freqs[i] + 128) / 256 && - freq1 <= pmagbbfb_freqs[i] + - (pmagbbfb_freqs[i] + 128) / 256) { - par->osc1 = pmagbbfb_freqs[i]; - break; - } - - if (par->osc0 - par->osc1 <= (par->osc0 + par->osc1 + 256) / 512 || - par->osc1 - par->osc0 <= (par->osc0 + par->osc1 + 256) / 512) - par->osc1 = 0; - - gp0_write(par, par->osc1 != 0); /* reselect OscX */ - - info->var.pixclock = par->osc1 ? - (1000000000 + par->osc1 / 2) / par->osc1 : - (1000000000 + par->osc0 / 2) / par->osc0; -}; - - -static int pmagbbfb_probe(struct device *dev) -{ - struct tc_dev *tdev = to_tc_dev(dev); - resource_size_t start, len; - struct fb_info *info; - struct pmagbbfb_par *par; - char freq0[12], freq1[12]; - u32 vid_base; - int err; - - info = framebuffer_alloc(sizeof(struct pmagbbfb_par), dev); - if (!info) { - printk(KERN_ERR "%s: Cannot allocate memory\n", dev_name(dev)); - return -ENOMEM; - } - - par = info->par; - dev_set_drvdata(dev, info); - - if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { - printk(KERN_ERR "%s: Cannot allocate color map\n", - dev_name(dev)); - err = -ENOMEM; - goto err_alloc; - } - - info->fbops = &pmagbbfb_ops; - info->fix = pmagbbfb_fix; - info->var = pmagbbfb_defined; - info->flags = FBINFO_DEFAULT; - - /* Request the I/O MEM resource. */ - start = tdev->resource.start; - len = tdev->resource.end - start + 1; - if (!request_mem_region(start, len, dev_name(dev))) { - printk(KERN_ERR "%s: Cannot reserve FB region\n", - dev_name(dev)); - err = -EBUSY; - goto err_cmap; - } - - /* MMIO mapping setup. */ - info->fix.mmio_start = start; - par->mmio = ioremap_nocache(info->fix.mmio_start, info->fix.mmio_len); - if (!par->mmio) { - printk(KERN_ERR "%s: Cannot map MMIO\n", dev_name(dev)); - err = -ENOMEM; - goto err_resource; - } - par->sfb = par->mmio + PMAGB_B_SFB; - par->dac = par->mmio + PMAGB_B_BT459; - - /* Frame buffer mapping setup. */ - info->fix.smem_start = start + PMAGB_B_FBMEM; - par->smem = ioremap_nocache(info->fix.smem_start, info->fix.smem_len); - if (!par->smem) { - printk(KERN_ERR "%s: Cannot map FB\n", dev_name(dev)); - err = -ENOMEM; - goto err_mmio_map; - } - vid_base = sfb_read(par, SFB_REG_VID_BASE); - info->screen_base = (void __iomem *)par->smem + vid_base * 0x1000; - info->screen_size = info->fix.smem_len - 2 * vid_base * 0x1000; - - pmagbbfb_erase_cursor(info); - pmagbbfb_screen_setup(info); - pmagbbfb_osc_setup(info); - - err = register_framebuffer(info); - if (err < 0) { - printk(KERN_ERR "%s: Cannot register framebuffer\n", - dev_name(dev)); - goto err_smem_map; - } - - get_device(dev); - - snprintf(freq0, sizeof(freq0), "%u.%03uMHz", - par->osc0 / 1000, par->osc0 % 1000); - snprintf(freq1, sizeof(freq1), "%u.%03uMHz", - par->osc1 / 1000, par->osc1 % 1000); - - fb_info(info, "%s frame buffer device at %s\n", - info->fix.id, dev_name(dev)); - fb_info(info, "Osc0: %s, Osc1: %s, Osc%u selected\n", - freq0, par->osc1 ? freq1 : "disabled", par->osc1 != 0); - - return 0; - - -err_smem_map: - iounmap(par->smem); - -err_mmio_map: - iounmap(par->mmio); - -err_resource: - release_mem_region(start, len); - -err_cmap: - fb_dealloc_cmap(&info->cmap); - -err_alloc: - framebuffer_release(info); - return err; -} - -static int __exit pmagbbfb_remove(struct device *dev) -{ - struct tc_dev *tdev = to_tc_dev(dev); - struct fb_info *info = dev_get_drvdata(dev); - struct pmagbbfb_par *par = info->par; - resource_size_t start, len; - - put_device(dev); - unregister_framebuffer(info); - iounmap(par->smem); - iounmap(par->mmio); - start = tdev->resource.start; - len = tdev->resource.end - start + 1; - release_mem_region(start, len); - fb_dealloc_cmap(&info->cmap); - framebuffer_release(info); - return 0; -} - - -/* - * Initialize the framebuffer. - */ -static const struct tc_device_id pmagbbfb_tc_table[] = { - { "DEC ", "PMAGB-BA" }, - { } -}; -MODULE_DEVICE_TABLE(tc, pmagbbfb_tc_table); - -static struct tc_driver pmagbbfb_driver = { - .id_table = pmagbbfb_tc_table, - .driver = { - .name = "pmagbbfb", - .bus = &tc_bus_type, - .probe = pmagbbfb_probe, - .remove = __exit_p(pmagbbfb_remove), - }, -}; - -static int __init pmagbbfb_init(void) -{ -#ifndef MODULE - if (fb_get_options("pmagbbfb", NULL)) - return -ENXIO; -#endif - return tc_register_driver(&pmagbbfb_driver); -} - -static void __exit pmagbbfb_exit(void) -{ - tc_unregister_driver(&pmagbbfb_driver); -} - - -module_init(pmagbbfb_init); -module_exit(pmagbbfb_exit); - -MODULE_LICENSE("GPL"); |