Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 2 | * linux/drivers/video/pmagb-b-fb.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 4 | * PMAGB-B TURBOchannel Smart Frame Buffer (SFB) card support, |
| 5 | * derived from: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * "HP300 Topcat framebuffer support (derived from macfb of all things) |
| 7 | * Phil Blundell <philb@gnu.org> 1998", the original code can be |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 8 | * found in the file hpfb.c in the same directory. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 10 | * DECstation related code Copyright (C) 1999, 2000, 2001 by |
| 11 | * Michael Engel <engel@unix-ag.org>, |
| 12 | * Karsten Merker <merker@linuxtag.org> and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * Harald Koerfgen. |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 14 | * Copyright (c) 2005 Maciej W. Rozycki |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | * |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 16 | * This file is subject to the terms and conditions of the GNU General |
| 17 | * Public License. See the file COPYING in the main directory of this |
| 18 | * archive for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | */ |
| 20 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 21 | #include <linux/compiler.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/delay.h> |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 23 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/fb.h> |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 25 | #include <linux/init.h> |
| 26 | #include <linux/kernel.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/types.h> |
| 29 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 30 | #include <asm/io.h> |
| 31 | #include <asm/system.h> |
| 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <asm/dec/tc.h> |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <video/pmagb-b-fb.h> |
| 36 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 37 | |
| 38 | struct pmagbbfb_par { |
| 39 | struct fb_info *next; |
| 40 | volatile void __iomem *mmio; |
| 41 | volatile void __iomem *smem; |
| 42 | volatile u32 __iomem *sfb; |
| 43 | volatile u32 __iomem *dac; |
| 44 | unsigned int osc0; |
| 45 | unsigned int osc1; |
| 46 | int slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | }; |
| 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 50 | static struct fb_info *root_pmagbbfb_dev; |
| 51 | |
| 52 | static struct fb_var_screeninfo pmagbbfb_defined __initdata = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | .bits_per_pixel = 8, |
| 54 | .red.length = 8, |
| 55 | .green.length = 8, |
| 56 | .blue.length = 8, |
| 57 | .activate = FB_ACTIVATE_NOW, |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 58 | .height = -1, |
| 59 | .width = -1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | .accel_flags = FB_ACCEL_NONE, |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 61 | .sync = FB_SYNC_ON_GREEN, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | .vmode = FB_VMODE_NONINTERLACED, |
| 63 | }; |
| 64 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 65 | static struct fb_fix_screeninfo pmagbbfb_fix __initdata = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | .id = "PMAGB-BA", |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 67 | .smem_len = (2048 * 1024), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | .type = FB_TYPE_PACKED_PIXELS, |
| 69 | .visual = FB_VISUAL_PSEUDOCOLOR, |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 70 | .mmio_len = PMAGB_B_FBMEM, |
| 71 | }; |
| 72 | |
| 73 | |
| 74 | static inline void sfb_write(struct pmagbbfb_par *par, unsigned int reg, u32 v) |
| 75 | { |
| 76 | writel(v, par->sfb + reg / 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | } |
| 78 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 79 | static inline u32 sfb_read(struct pmagbbfb_par *par, unsigned int reg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | { |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 81 | return readl(par->sfb + reg / 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | } |
| 83 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 84 | static inline void dac_write(struct pmagbbfb_par *par, unsigned int reg, u8 v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | { |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 86 | writeb(v, par->dac + reg / 4); |
| 87 | } |
| 88 | |
| 89 | static inline u8 dac_read(struct pmagbbfb_par *par, unsigned int reg) |
| 90 | { |
| 91 | return readb(par->dac + reg / 4); |
| 92 | } |
| 93 | |
| 94 | static inline void gp0_write(struct pmagbbfb_par *par, u32 v) |
| 95 | { |
| 96 | writel(v, par->mmio + PMAGB_B_GP0); |
| 97 | } |
| 98 | |
| 99 | |
| 100 | /* |
| 101 | * Set the palette. |
| 102 | */ |
| 103 | static int pmagbbfb_setcolreg(unsigned int regno, unsigned int red, |
| 104 | unsigned int green, unsigned int blue, |
| 105 | unsigned int transp, struct fb_info *info) |
| 106 | { |
| 107 | struct pmagbbfb_par *par = info->par; |
| 108 | |
| 109 | BUG_ON(regno >= info->cmap.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
| 111 | red >>= 8; /* The cmap fields are 16 bits */ |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 112 | green >>= 8; /* wide, but the hardware colormap */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | blue >>= 8; /* registers are only 8 bits wide */ |
| 114 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 115 | mb(); |
| 116 | dac_write(par, BT459_ADDR_LO, regno); |
| 117 | dac_write(par, BT459_ADDR_HI, 0x00); |
| 118 | wmb(); |
| 119 | dac_write(par, BT459_CMAP, red); |
| 120 | wmb(); |
| 121 | dac_write(par, BT459_CMAP, green); |
| 122 | wmb(); |
| 123 | dac_write(par, BT459_CMAP, blue); |
| 124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | return 0; |
| 126 | } |
| 127 | |
| 128 | static struct fb_ops pmagbbfb_ops = { |
| 129 | .owner = THIS_MODULE, |
| 130 | .fb_setcolreg = pmagbbfb_setcolreg, |
| 131 | .fb_fillrect = cfb_fillrect, |
| 132 | .fb_copyarea = cfb_copyarea, |
| 133 | .fb_imageblit = cfb_imageblit, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | }; |
| 135 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 136 | |
| 137 | /* |
| 138 | * Turn the hardware cursor off. |
| 139 | */ |
| 140 | static void __init pmagbbfb_erase_cursor(struct fb_info *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | { |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 142 | struct pmagbbfb_par *par = info->par; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 144 | mb(); |
| 145 | dac_write(par, BT459_ADDR_LO, 0x00); |
| 146 | dac_write(par, BT459_ADDR_HI, 0x03); |
| 147 | wmb(); |
| 148 | dac_write(par, BT459_DATA, 0x00); |
| 149 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 151 | /* |
| 152 | * Set up screen parameters. |
| 153 | */ |
| 154 | static void __init pmagbbfb_screen_setup(struct fb_info *info) |
| 155 | { |
| 156 | struct pmagbbfb_par *par = info->par; |
| 157 | |
| 158 | info->var.xres = ((sfb_read(par, SFB_REG_VID_HOR) >> |
| 159 | SFB_VID_HOR_PIX_SHIFT) & SFB_VID_HOR_PIX_MASK) * 4; |
| 160 | info->var.xres_virtual = info->var.xres; |
| 161 | info->var.yres = (sfb_read(par, SFB_REG_VID_VER) >> |
| 162 | SFB_VID_VER_SL_SHIFT) & SFB_VID_VER_SL_MASK; |
| 163 | info->var.yres_virtual = info->var.yres; |
| 164 | info->var.left_margin = ((sfb_read(par, SFB_REG_VID_HOR) >> |
| 165 | SFB_VID_HOR_BP_SHIFT) & |
| 166 | SFB_VID_HOR_BP_MASK) * 4; |
| 167 | info->var.right_margin = ((sfb_read(par, SFB_REG_VID_HOR) >> |
| 168 | SFB_VID_HOR_FP_SHIFT) & |
| 169 | SFB_VID_HOR_FP_MASK) * 4; |
| 170 | info->var.upper_margin = (sfb_read(par, SFB_REG_VID_VER) >> |
| 171 | SFB_VID_VER_BP_SHIFT) & SFB_VID_VER_BP_MASK; |
| 172 | info->var.lower_margin = (sfb_read(par, SFB_REG_VID_VER) >> |
| 173 | SFB_VID_VER_FP_SHIFT) & SFB_VID_VER_FP_MASK; |
| 174 | info->var.hsync_len = ((sfb_read(par, SFB_REG_VID_HOR) >> |
| 175 | SFB_VID_HOR_SYN_SHIFT) & |
| 176 | SFB_VID_HOR_SYN_MASK) * 4; |
| 177 | info->var.vsync_len = (sfb_read(par, SFB_REG_VID_VER) >> |
| 178 | SFB_VID_VER_SYN_SHIFT) & SFB_VID_VER_SYN_MASK; |
| 179 | |
| 180 | info->fix.line_length = info->var.xres; |
| 181 | }; |
| 182 | |
| 183 | /* |
| 184 | * Determine oscillator configuration. |
| 185 | */ |
| 186 | static void __init pmagbbfb_osc_setup(struct fb_info *info) |
| 187 | { |
| 188 | static unsigned int pmagbbfb_freqs[] __initdata = { |
Maciej W. Rozycki | 572c04b | 2006-12-08 02:40:21 -0800 | [diff] [blame^] | 189 | 130808, 119843, 104000, 92980, 74370, 72800, |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 190 | 69197, 66000, 65000, 50350, 36000, 32000, 25175 |
| 191 | }; |
| 192 | struct pmagbbfb_par *par = info->par; |
| 193 | u32 count0 = 8, count1 = 8, counttc = 16 * 256 + 8; |
| 194 | u32 freq0, freq1, freqtc = get_tc_speed() / 250; |
| 195 | int i, j; |
| 196 | |
| 197 | gp0_write(par, 0); /* select Osc0 */ |
| 198 | for (j = 0; j < 16; j++) { |
| 199 | mb(); |
| 200 | sfb_write(par, SFB_REG_TCCLK_COUNT, 0); |
| 201 | mb(); |
| 202 | for (i = 0; i < 100; i++) { /* nominally max. 20.5us */ |
| 203 | if (sfb_read(par, SFB_REG_TCCLK_COUNT) == 0) |
| 204 | break; |
| 205 | udelay(1); |
| 206 | } |
| 207 | count0 += sfb_read(par, SFB_REG_VIDCLK_COUNT); |
| 208 | } |
| 209 | |
| 210 | gp0_write(par, 1); /* select Osc1 */ |
| 211 | for (j = 0; j < 16; j++) { |
| 212 | mb(); |
| 213 | sfb_write(par, SFB_REG_TCCLK_COUNT, 0); |
| 214 | |
| 215 | for (i = 0; i < 100; i++) { /* nominally max. 20.5us */ |
| 216 | if (sfb_read(par, SFB_REG_TCCLK_COUNT) == 0) |
| 217 | break; |
| 218 | udelay(1); |
| 219 | } |
| 220 | count1 += sfb_read(par, SFB_REG_VIDCLK_COUNT); |
| 221 | } |
| 222 | |
| 223 | freq0 = (freqtc * count0 + counttc / 2) / counttc; |
| 224 | par->osc0 = freq0; |
| 225 | if (freq0 >= pmagbbfb_freqs[0] - (pmagbbfb_freqs[0] + 32) / 64 && |
| 226 | freq0 <= pmagbbfb_freqs[0] + (pmagbbfb_freqs[0] + 32) / 64) |
| 227 | par->osc0 = pmagbbfb_freqs[0]; |
| 228 | |
| 229 | freq1 = (par->osc0 * count1 + count0 / 2) / count0; |
| 230 | par->osc1 = freq1; |
Tobias Klauser | d1ae418 | 2006-03-27 01:17:39 -0800 | [diff] [blame] | 231 | for (i = 0; i < ARRAY_SIZE(pmagbbfb_freqs); i++) |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 232 | if (freq1 >= pmagbbfb_freqs[i] - |
| 233 | (pmagbbfb_freqs[i] + 128) / 256 && |
| 234 | freq1 <= pmagbbfb_freqs[i] + |
| 235 | (pmagbbfb_freqs[i] + 128) / 256) { |
| 236 | par->osc1 = pmagbbfb_freqs[i]; |
| 237 | break; |
| 238 | } |
| 239 | |
| 240 | if (par->osc0 - par->osc1 <= (par->osc0 + par->osc1 + 256) / 512 || |
| 241 | par->osc1 - par->osc0 <= (par->osc0 + par->osc1 + 256) / 512) |
| 242 | par->osc1 = 0; |
| 243 | |
| 244 | gp0_write(par, par->osc1 != 0); /* reselect OscX */ |
| 245 | |
| 246 | info->var.pixclock = par->osc1 ? |
| 247 | (1000000000 + par->osc1 / 2) / par->osc1 : |
| 248 | (1000000000 + par->osc0 / 2) / par->osc0; |
| 249 | }; |
| 250 | |
| 251 | |
| 252 | static int __init pmagbbfb_init_one(int slot) |
| 253 | { |
| 254 | char freq0[12], freq1[12]; |
| 255 | struct fb_info *info; |
| 256 | struct pmagbbfb_par *par; |
| 257 | unsigned long base_addr; |
| 258 | u32 vid_base; |
| 259 | |
| 260 | info = framebuffer_alloc(sizeof(struct pmagbbfb_par), NULL); |
| 261 | if (!info) |
| 262 | return -ENOMEM; |
| 263 | |
| 264 | par = info->par; |
| 265 | par->slot = slot; |
| 266 | claim_tc_card(par->slot); |
| 267 | |
| 268 | base_addr = get_tc_base_addr(par->slot); |
| 269 | |
| 270 | par->next = root_pmagbbfb_dev; |
| 271 | root_pmagbbfb_dev = info; |
| 272 | |
| 273 | if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) |
| 274 | goto err_alloc; |
| 275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | info->fbops = &pmagbbfb_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | info->fix = pmagbbfb_fix; |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 278 | info->var = pmagbbfb_defined; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | info->flags = FBINFO_DEFAULT; |
| 280 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 281 | /* MMIO mapping setup. */ |
| 282 | info->fix.mmio_start = base_addr; |
| 283 | par->mmio = ioremap_nocache(info->fix.mmio_start, info->fix.mmio_len); |
| 284 | if (!par->mmio) |
| 285 | goto err_cmap; |
| 286 | par->sfb = par->mmio + PMAGB_B_SFB; |
| 287 | par->dac = par->mmio + PMAGB_B_BT459; |
| 288 | |
| 289 | /* Frame buffer mapping setup. */ |
| 290 | info->fix.smem_start = base_addr + PMAGB_B_FBMEM; |
| 291 | par->smem = ioremap_nocache(info->fix.smem_start, info->fix.smem_len); |
| 292 | if (!par->smem) |
| 293 | goto err_mmio_map; |
| 294 | vid_base = sfb_read(par, SFB_REG_VID_BASE); |
| 295 | info->screen_base = (void __iomem *)par->smem + vid_base * 0x1000; |
| 296 | info->screen_size = info->fix.smem_len - 2 * vid_base * 0x1000; |
| 297 | |
| 298 | pmagbbfb_erase_cursor(info); |
| 299 | pmagbbfb_screen_setup(info); |
| 300 | pmagbbfb_osc_setup(info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
| 302 | if (register_framebuffer(info) < 0) |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 303 | goto err_smem_map; |
| 304 | |
| 305 | snprintf(freq0, sizeof(freq0), "%u.%03uMHz", |
| 306 | par->osc0 / 1000, par->osc0 % 1000); |
| 307 | snprintf(freq1, sizeof(freq1), "%u.%03uMHz", |
| 308 | par->osc1 / 1000, par->osc1 % 1000); |
| 309 | |
| 310 | pr_info("fb%d: %s frame buffer device in slot %d\n", |
| 311 | info->node, info->fix.id, par->slot); |
| 312 | pr_info("fb%d: Osc0: %s, Osc1: %s, Osc%u selected\n", |
| 313 | info->node, freq0, par->osc1 ? freq1 : "disabled", |
| 314 | par->osc1 != 0); |
| 315 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | return 0; |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 317 | |
| 318 | |
| 319 | err_smem_map: |
| 320 | iounmap(par->smem); |
| 321 | |
| 322 | err_mmio_map: |
| 323 | iounmap(par->mmio); |
| 324 | |
| 325 | err_cmap: |
| 326 | fb_dealloc_cmap(&info->cmap); |
| 327 | |
| 328 | err_alloc: |
| 329 | root_pmagbbfb_dev = par->next; |
| 330 | release_tc_card(par->slot); |
| 331 | framebuffer_release(info); |
| 332 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | } |
| 334 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 335 | static void __exit pmagbbfb_exit_one(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | { |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 337 | struct fb_info *info = root_pmagbbfb_dev; |
| 338 | struct pmagbbfb_par *par = info->par; |
| 339 | |
| 340 | unregister_framebuffer(info); |
| 341 | iounmap(par->smem); |
| 342 | iounmap(par->mmio); |
| 343 | fb_dealloc_cmap(&info->cmap); |
| 344 | root_pmagbbfb_dev = par->next; |
| 345 | release_tc_card(par->slot); |
| 346 | framebuffer_release(info); |
| 347 | } |
| 348 | |
| 349 | |
| 350 | /* |
| 351 | * Initialise the framebuffer. |
| 352 | */ |
| 353 | static int __init pmagbbfb_init(void) |
| 354 | { |
| 355 | int count = 0; |
| 356 | int slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | |
| 358 | if (fb_get_options("pmagbbfb", NULL)) |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 359 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 361 | while ((slot = search_tc_card("PMAGB-BA")) >= 0) { |
| 362 | if (pmagbbfb_init_one(slot) < 0) |
| 363 | break; |
| 364 | count++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | } |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 366 | return (count > 0) ? 0 : -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | } |
| 368 | |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 369 | static void __exit pmagbbfb_exit(void) |
| 370 | { |
| 371 | while (root_pmagbbfb_dev) |
| 372 | pmagbbfb_exit_one(); |
| 373 | } |
| 374 | |
| 375 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | module_init(pmagbbfb_init); |
Ralf Baechle | 7901c79 | 2005-09-03 15:56:11 -0700 | [diff] [blame] | 377 | module_exit(pmagbbfb_exit); |
| 378 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | MODULE_LICENSE("GPL"); |