blob: e38d3b7c3ad7b28e5b63909a83885ff535d17f17 [file] [log] [blame]
Andrei Konovalov147394c2007-05-08 00:40:18 -07001/*
2 * xilinxfb.c
3 *
4 * Xilinx TFT LCD frame buffer driver
5 *
6 * Author: MontaVista Software, Inc.
7 * source@mvista.com
8 *
Grant Likely31e8d462007-10-04 10:48:37 -06009 * 2002-2007 (c) MontaVista Software, Inc.
10 * 2007 (c) Secret Lab Technologies, Ltd.
11 *
12 * This file is licensed under the terms of the GNU General Public License
13 * version 2. This program is licensed "as is" without any warranty of any
14 * kind, whether express or implied.
Andrei Konovalov147394c2007-05-08 00:40:18 -070015 */
16
17/*
18 * This driver was based on au1100fb.c by MontaVista rewritten for 2.6
19 * by Embedded Alley Solutions <source@embeddedalley.com>, which in turn
20 * was based on skeletonfb.c, Skeleton for a frame buffer device by
21 * Geert Uytterhoeven.
22 */
23
Grant Likely3cb3ec22007-10-04 10:48:36 -060024#include <linux/device.h>
Andrei Konovalov147394c2007-05-08 00:40:18 -070025#include <linux/module.h>
26#include <linux/kernel.h>
27#include <linux/version.h>
28#include <linux/errno.h>
29#include <linux/string.h>
30#include <linux/mm.h>
31#include <linux/fb.h>
32#include <linux/init.h>
33#include <linux/dma-mapping.h>
34#include <linux/platform_device.h>
Grant Likely31e8d462007-10-04 10:48:37 -060035#if defined(CONFIG_OF)
36#include <linux/of_device.h>
37#include <linux/of_platform.h>
38#endif
Andrei Konovalov147394c2007-05-08 00:40:18 -070039#include <asm/io.h>
Grant Likelydc8afdc2007-10-01 07:47:00 +100040#include <linux/xilinxfb.h>
Andrei Konovalov147394c2007-05-08 00:40:18 -070041
42#define DRIVER_NAME "xilinxfb"
43#define DRIVER_DESCRIPTION "Xilinx TFT LCD frame buffer driver"
44
45/*
46 * Xilinx calls it "PLB TFT LCD Controller" though it can also be used for
47 * the VGA port on the Xilinx ML40x board. This is a hardware display controller
48 * for a 640x480 resolution TFT or VGA screen.
49 *
50 * The interface to the framebuffer is nice and simple. There are two
51 * control registers. The first tells the LCD interface where in memory
52 * the frame buffer is (only the 11 most significant bits are used, so
53 * don't start thinking about scrolling). The second allows the LCD to
54 * be turned on or off as well as rotated 180 degrees.
55 */
56#define NUM_REGS 2
57#define REG_FB_ADDR 0
58#define REG_CTRL 1
59#define REG_CTRL_ENABLE 0x0001
60#define REG_CTRL_ROTATE 0x0002
61
62/*
63 * The hardware only handles a single mode: 640x480 24 bit true
64 * color. Each pixel gets a word (32 bits) of memory. Within each word,
65 * the 8 most significant bits are ignored, the next 8 bits are the red
66 * level, the next 8 bits are the green level and the 8 least
67 * significant bits are the blue level. Each row of the LCD uses 1024
68 * words, but only the first 640 pixels are displayed with the other 384
69 * words being ignored. There are 480 rows.
70 */
71#define BYTES_PER_PIXEL 4
72#define BITS_PER_PIXEL (BYTES_PER_PIXEL * 8)
Andrei Konovalov147394c2007-05-08 00:40:18 -070073
74#define RED_SHIFT 16
75#define GREEN_SHIFT 8
76#define BLUE_SHIFT 0
77
78#define PALETTE_ENTRIES_NO 16 /* passed to fb_alloc_cmap() */
79
80/*
Grant Likely01ba1e92007-10-11 04:31:46 +100081 * Default xilinxfb configuration
82 */
83static struct xilinxfb_platform_data xilinx_fb_default_pdata = {
Grant Likelyb4d6a722007-10-11 04:31:51 +100084 .xres = 640,
85 .yres = 480,
86 .xvirt = 1024,
Grant Likely86a22492007-10-13 22:13:32 -060087 .yvirt = 480,
Grant Likely01ba1e92007-10-11 04:31:46 +100088};
89
90/*
Andrei Konovalov147394c2007-05-08 00:40:18 -070091 * Here are the default fb_fix_screeninfo and fb_var_screeninfo structures
92 */
Grant Likely3f5b85d2007-07-31 00:37:38 -070093static struct fb_fix_screeninfo xilinx_fb_fix = {
Andrei Konovalov147394c2007-05-08 00:40:18 -070094 .id = "Xilinx",
95 .type = FB_TYPE_PACKED_PIXELS,
96 .visual = FB_VISUAL_TRUECOLOR,
Andrei Konovalov147394c2007-05-08 00:40:18 -070097 .accel = FB_ACCEL_NONE
98};
99
Grant Likely3f5b85d2007-07-31 00:37:38 -0700100static struct fb_var_screeninfo xilinx_fb_var = {
Andrei Konovalov147394c2007-05-08 00:40:18 -0700101 .bits_per_pixel = BITS_PER_PIXEL,
102
103 .red = { RED_SHIFT, 8, 0 },
104 .green = { GREEN_SHIFT, 8, 0 },
105 .blue = { BLUE_SHIFT, 8, 0 },
106 .transp = { 0, 0, 0 },
107
108 .activate = FB_ACTIVATE_NOW
109};
110
111struct xilinxfb_drvdata {
112
113 struct fb_info info; /* FB driver info record */
114
115 u32 regs_phys; /* phys. address of the control registers */
116 u32 __iomem *regs; /* virt. address of the control registers */
117
Grant Likelyb9a22792007-10-04 10:48:37 -0600118 void *fb_virt; /* virt. address of the frame buffer */
Andrei Konovalov147394c2007-05-08 00:40:18 -0700119 dma_addr_t fb_phys; /* phys. address of the frame buffer */
Grant Likely287e5d62007-10-11 04:31:56 +1000120 int fb_alloced; /* Flag, was the fb memory alloced? */
Andrei Konovalov147394c2007-05-08 00:40:18 -0700121
122 u32 reg_ctrl_default;
123
124 u32 pseudo_palette[PALETTE_ENTRIES_NO];
125 /* Fake palette of 16 colors */
126};
127
128#define to_xilinxfb_drvdata(_info) \
129 container_of(_info, struct xilinxfb_drvdata, info)
130
131/*
132 * The LCD controller has DCR interface to its registers, but all
133 * the boards and configurations the driver has been tested with
134 * use opb2dcr bridge. So the registers are seen as memory mapped.
135 * This macro is to make it simple to add the direct DCR access
136 * when it's needed.
137 */
138#define xilinx_fb_out_be32(driverdata, offset, val) \
139 out_be32(driverdata->regs + offset, val)
140
141static int
142xilinx_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue,
143 unsigned transp, struct fb_info *fbi)
144{
145 u32 *palette = fbi->pseudo_palette;
146
147 if (regno >= PALETTE_ENTRIES_NO)
148 return -EINVAL;
149
150 if (fbi->var.grayscale) {
151 /* Convert color to grayscale.
152 * grayscale = 0.30*R + 0.59*G + 0.11*B */
153 red = green = blue =
154 (red * 77 + green * 151 + blue * 28 + 127) >> 8;
155 }
156
157 /* fbi->fix.visual is always FB_VISUAL_TRUECOLOR */
158
159 /* We only handle 8 bits of each color. */
160 red >>= 8;
161 green >>= 8;
162 blue >>= 8;
163 palette[regno] = (red << RED_SHIFT) | (green << GREEN_SHIFT) |
164 (blue << BLUE_SHIFT);
165
166 return 0;
167}
168
169static int
170xilinx_fb_blank(int blank_mode, struct fb_info *fbi)
171{
172 struct xilinxfb_drvdata *drvdata = to_xilinxfb_drvdata(fbi);
173
174 switch (blank_mode) {
175 case FB_BLANK_UNBLANK:
176 /* turn on panel */
177 xilinx_fb_out_be32(drvdata, REG_CTRL, drvdata->reg_ctrl_default);
178 break;
179
180 case FB_BLANK_NORMAL:
181 case FB_BLANK_VSYNC_SUSPEND:
182 case FB_BLANK_HSYNC_SUSPEND:
183 case FB_BLANK_POWERDOWN:
184 /* turn off panel */
185 xilinx_fb_out_be32(drvdata, REG_CTRL, 0);
186 default:
187 break;
188
189 }
190 return 0; /* success */
191}
192
193static struct fb_ops xilinxfb_ops =
194{
195 .owner = THIS_MODULE,
196 .fb_setcolreg = xilinx_fb_setcolreg,
197 .fb_blank = xilinx_fb_blank,
198 .fb_fillrect = cfb_fillrect,
199 .fb_copyarea = cfb_copyarea,
200 .fb_imageblit = cfb_imageblit,
201};
202
Grant Likely26477622007-10-04 10:48:37 -0600203/* ---------------------------------------------------------------------
204 * Bus independent setup/teardown
205 */
Andrei Konovalov147394c2007-05-08 00:40:18 -0700206
Grant Likely26477622007-10-04 10:48:37 -0600207static int xilinxfb_assign(struct device *dev, unsigned long physaddr,
Grant Likely01ba1e92007-10-11 04:31:46 +1000208 struct xilinxfb_platform_data *pdata)
Andrei Konovalov147394c2007-05-08 00:40:18 -0700209{
Andrei Konovalov147394c2007-05-08 00:40:18 -0700210 struct xilinxfb_drvdata *drvdata;
Grant Likely26477622007-10-04 10:48:37 -0600211 int rc;
Grant Likelyb4d6a722007-10-11 04:31:51 +1000212 int fbsize = pdata->xvirt * pdata->yvirt * BYTES_PER_PIXEL;
Andrei Konovalov147394c2007-05-08 00:40:18 -0700213
Grant Likely26477622007-10-04 10:48:37 -0600214 /* Allocate the driver data region */
Andrei Konovalov147394c2007-05-08 00:40:18 -0700215 drvdata = kzalloc(sizeof(*drvdata), GFP_KERNEL);
216 if (!drvdata) {
Grant Likely3cb3ec22007-10-04 10:48:36 -0600217 dev_err(dev, "Couldn't allocate device private record\n");
Andrei Konovalov147394c2007-05-08 00:40:18 -0700218 return -ENOMEM;
219 }
220 dev_set_drvdata(dev, drvdata);
221
222 /* Map the control registers in */
Grant Likely26477622007-10-04 10:48:37 -0600223 if (!request_mem_region(physaddr, 8, DRIVER_NAME)) {
224 dev_err(dev, "Couldn't lock memory region at 0x%08lX\n",
225 physaddr);
226 rc = -ENODEV;
Grant Likely3fb99ce2007-10-04 10:48:37 -0600227 goto err_region;
Andrei Konovalov147394c2007-05-08 00:40:18 -0700228 }
Grant Likely26477622007-10-04 10:48:37 -0600229 drvdata->regs_phys = physaddr;
230 drvdata->regs = ioremap(physaddr, 8);
231 if (!drvdata->regs) {
232 dev_err(dev, "Couldn't lock memory region at 0x%08lX\n",
233 physaddr);
234 rc = -ENODEV;
235 goto err_map;
Andrei Konovalov147394c2007-05-08 00:40:18 -0700236 }
Andrei Konovalov147394c2007-05-08 00:40:18 -0700237
238 /* Allocate the framebuffer memory */
Grant Likely287e5d62007-10-11 04:31:56 +1000239 if (pdata->fb_phys) {
240 drvdata->fb_phys = pdata->fb_phys;
241 drvdata->fb_virt = ioremap(pdata->fb_phys, fbsize);
242 } else {
243 drvdata->fb_alloced = 1;
244 drvdata->fb_virt = dma_alloc_coherent(dev, PAGE_ALIGN(fbsize),
245 &drvdata->fb_phys, GFP_KERNEL);
246 }
247
Andrei Konovalov147394c2007-05-08 00:40:18 -0700248 if (!drvdata->fb_virt) {
Grant Likely3cb3ec22007-10-04 10:48:36 -0600249 dev_err(dev, "Could not allocate frame buffer memory\n");
Grant Likely26477622007-10-04 10:48:37 -0600250 rc = -ENOMEM;
Grant Likely3fb99ce2007-10-04 10:48:37 -0600251 goto err_fbmem;
Andrei Konovalov147394c2007-05-08 00:40:18 -0700252 }
253
254 /* Clear (turn to black) the framebuffer */
Grant Likelyb4d6a722007-10-11 04:31:51 +1000255 memset_io((void __iomem *)drvdata->fb_virt, 0, fbsize);
Andrei Konovalov147394c2007-05-08 00:40:18 -0700256
257 /* Tell the hardware where the frame buffer is */
258 xilinx_fb_out_be32(drvdata, REG_FB_ADDR, drvdata->fb_phys);
259
260 /* Turn on the display */
Grant Likelyf53161d2007-07-31 00:37:39 -0700261 drvdata->reg_ctrl_default = REG_CTRL_ENABLE;
Grant Likely01ba1e92007-10-11 04:31:46 +1000262 if (pdata->rotate_screen)
Grant Likelyf53161d2007-07-31 00:37:39 -0700263 drvdata->reg_ctrl_default |= REG_CTRL_ROTATE;
Andrei Konovalov147394c2007-05-08 00:40:18 -0700264 xilinx_fb_out_be32(drvdata, REG_CTRL, drvdata->reg_ctrl_default);
265
266 /* Fill struct fb_info */
267 drvdata->info.device = dev;
Grant Likelyb9a22792007-10-04 10:48:37 -0600268 drvdata->info.screen_base = (void __iomem *)drvdata->fb_virt;
Andrei Konovalov147394c2007-05-08 00:40:18 -0700269 drvdata->info.fbops = &xilinxfb_ops;
270 drvdata->info.fix = xilinx_fb_fix;
271 drvdata->info.fix.smem_start = drvdata->fb_phys;
Grant Likelyb4d6a722007-10-11 04:31:51 +1000272 drvdata->info.fix.smem_len = fbsize;
273 drvdata->info.fix.line_length = pdata->xvirt * BYTES_PER_PIXEL;
274
Andrei Konovalov147394c2007-05-08 00:40:18 -0700275 drvdata->info.pseudo_palette = drvdata->pseudo_palette;
Grant Likely26477622007-10-04 10:48:37 -0600276 drvdata->info.flags = FBINFO_DEFAULT;
277 drvdata->info.var = xilinx_fb_var;
Grant Likelyb4d6a722007-10-11 04:31:51 +1000278 drvdata->info.var.height = pdata->screen_height_mm;
279 drvdata->info.var.width = pdata->screen_width_mm;
280 drvdata->info.var.xres = pdata->xres;
281 drvdata->info.var.yres = pdata->yres;
282 drvdata->info.var.xres_virtual = pdata->xvirt;
283 drvdata->info.var.yres_virtual = pdata->yvirt;
Grant Likely26477622007-10-04 10:48:37 -0600284
285 /* Allocate a colour map */
286 rc = fb_alloc_cmap(&drvdata->info.cmap, PALETTE_ENTRIES_NO, 0);
287 if (rc) {
Grant Likely3cb3ec22007-10-04 10:48:36 -0600288 dev_err(dev, "Fail to allocate colormap (%d entries)\n",
Andrei Konovalov147394c2007-05-08 00:40:18 -0700289 PALETTE_ENTRIES_NO);
Grant Likely3fb99ce2007-10-04 10:48:37 -0600290 goto err_cmap;
Andrei Konovalov147394c2007-05-08 00:40:18 -0700291 }
292
Andrei Konovalov147394c2007-05-08 00:40:18 -0700293 /* Register new frame buffer */
Grant Likely26477622007-10-04 10:48:37 -0600294 rc = register_framebuffer(&drvdata->info);
295 if (rc) {
Grant Likely3cb3ec22007-10-04 10:48:36 -0600296 dev_err(dev, "Could not register frame buffer\n");
Grant Likely3fb99ce2007-10-04 10:48:37 -0600297 goto err_regfb;
Andrei Konovalov147394c2007-05-08 00:40:18 -0700298 }
299
Grant Likely258de4b2007-10-04 10:48:36 -0600300 /* Put a banner in the log (for DEBUG) */
Grant Likely26477622007-10-04 10:48:37 -0600301 dev_dbg(dev, "regs: phys=%lx, virt=%p\n", physaddr, drvdata->regs);
Grant Likely258de4b2007-10-04 10:48:36 -0600302 dev_dbg(dev, "fb: phys=%p, virt=%p, size=%x\n",
Grant Likelyb4d6a722007-10-11 04:31:51 +1000303 (void*)drvdata->fb_phys, drvdata->fb_virt, fbsize);
304
Andrei Konovalov147394c2007-05-08 00:40:18 -0700305 return 0; /* success */
306
Grant Likely3fb99ce2007-10-04 10:48:37 -0600307err_regfb:
Andrei Konovalov147394c2007-05-08 00:40:18 -0700308 fb_dealloc_cmap(&drvdata->info.cmap);
309
Grant Likely3fb99ce2007-10-04 10:48:37 -0600310err_cmap:
Grant Likely287e5d62007-10-11 04:31:56 +1000311 if (drvdata->fb_alloced)
312 dma_free_coherent(dev, PAGE_ALIGN(fbsize), drvdata->fb_virt,
313 drvdata->fb_phys);
Andrei Konovalov147394c2007-05-08 00:40:18 -0700314 /* Turn off the display */
315 xilinx_fb_out_be32(drvdata, REG_CTRL, 0);
Andrei Konovalov147394c2007-05-08 00:40:18 -0700316
Grant Likely3fb99ce2007-10-04 10:48:37 -0600317err_fbmem:
Grant Likely26477622007-10-04 10:48:37 -0600318 iounmap(drvdata->regs);
319
320err_map:
321 release_mem_region(physaddr, 8);
Andrei Konovalov147394c2007-05-08 00:40:18 -0700322
Grant Likely3fb99ce2007-10-04 10:48:37 -0600323err_region:
Andrei Konovalov147394c2007-05-08 00:40:18 -0700324 kfree(drvdata);
325 dev_set_drvdata(dev, NULL);
326
Grant Likely26477622007-10-04 10:48:37 -0600327 return rc;
Andrei Konovalov147394c2007-05-08 00:40:18 -0700328}
329
Grant Likely26477622007-10-04 10:48:37 -0600330static int xilinxfb_release(struct device *dev)
Andrei Konovalov147394c2007-05-08 00:40:18 -0700331{
Grant Likely26477622007-10-04 10:48:37 -0600332 struct xilinxfb_drvdata *drvdata = dev_get_drvdata(dev);
Andrei Konovalov147394c2007-05-08 00:40:18 -0700333
334#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
335 xilinx_fb_blank(VESA_POWERDOWN, &drvdata->info);
336#endif
337
338 unregister_framebuffer(&drvdata->info);
339
340 fb_dealloc_cmap(&drvdata->info.cmap);
341
Grant Likely287e5d62007-10-11 04:31:56 +1000342 if (drvdata->fb_alloced)
343 dma_free_coherent(dev, PAGE_ALIGN(drvdata->info.fix.smem_len),
344 drvdata->fb_virt, drvdata->fb_phys);
Andrei Konovalov147394c2007-05-08 00:40:18 -0700345
346 /* Turn off the display */
347 xilinx_fb_out_be32(drvdata, REG_CTRL, 0);
348 iounmap(drvdata->regs);
349
350 release_mem_region(drvdata->regs_phys, 8);
351
352 kfree(drvdata);
353 dev_set_drvdata(dev, NULL);
354
355 return 0;
356}
357
Grant Likely26477622007-10-04 10:48:37 -0600358/* ---------------------------------------------------------------------
359 * Platform bus binding
360 */
361
362static int
Grant Likely47473e32007-10-04 10:48:37 -0600363xilinxfb_platform_probe(struct platform_device *pdev)
Grant Likely26477622007-10-04 10:48:37 -0600364{
Grant Likely26477622007-10-04 10:48:37 -0600365 struct xilinxfb_platform_data *pdata;
366 struct resource *res;
Grant Likely26477622007-10-04 10:48:37 -0600367
368 /* Find the registers address */
369 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
370 if (!res) {
Grant Likely47473e32007-10-04 10:48:37 -0600371 dev_err(&pdev->dev, "Couldn't get registers resource\n");
Grant Likely26477622007-10-04 10:48:37 -0600372 return -ENODEV;
373 }
374
Grant Likelye3cec002007-10-04 15:44:52 -0600375 /* If a pdata structure is provided, then extract the parameters */
Grant Likelyb4d6a722007-10-11 04:31:51 +1000376 pdata = &xilinx_fb_default_pdata;
377 if (pdev->dev.platform_data) {
Grant Likely01ba1e92007-10-11 04:31:46 +1000378 pdata = pdev->dev.platform_data;
Grant Likelyb4d6a722007-10-11 04:31:51 +1000379 if (!pdata->xres)
380 pdata->xres = xilinx_fb_default_pdata.xres;
381 if (!pdata->yres)
382 pdata->yres = xilinx_fb_default_pdata.yres;
383 if (!pdata->xvirt)
384 pdata->xvirt = xilinx_fb_default_pdata.xvirt;
385 if (!pdata->yvirt)
386 pdata->yvirt = xilinx_fb_default_pdata.yvirt;
387 }
Grant Likely26477622007-10-04 10:48:37 -0600388
Grant Likely01ba1e92007-10-11 04:31:46 +1000389 return xilinxfb_assign(&pdev->dev, res->start, pdata);
Grant Likely26477622007-10-04 10:48:37 -0600390}
391
392static int
Grant Likely47473e32007-10-04 10:48:37 -0600393xilinxfb_platform_remove(struct platform_device *pdev)
Grant Likely26477622007-10-04 10:48:37 -0600394{
Grant Likely47473e32007-10-04 10:48:37 -0600395 return xilinxfb_release(&pdev->dev);
Grant Likely26477622007-10-04 10:48:37 -0600396}
397
Andrei Konovalov147394c2007-05-08 00:40:18 -0700398
Grant Likely47473e32007-10-04 10:48:37 -0600399static struct platform_driver xilinxfb_platform_driver = {
400 .probe = xilinxfb_platform_probe,
401 .remove = xilinxfb_platform_remove,
402 .driver = {
403 .owner = THIS_MODULE,
404 .name = DRIVER_NAME,
405 },
Andrei Konovalov147394c2007-05-08 00:40:18 -0700406};
407
Grant Likely31e8d462007-10-04 10:48:37 -0600408/* ---------------------------------------------------------------------
409 * OF bus binding
410 */
411
412#if defined(CONFIG_OF)
413static int __devinit
414xilinxfb_of_probe(struct of_device *op, const struct of_device_id *match)
415{
416 struct resource res;
417 const u32 *prop;
Grant Likely01ba1e92007-10-11 04:31:46 +1000418 struct xilinxfb_platform_data pdata;
Grant Likely31e8d462007-10-04 10:48:37 -0600419 int size, rc;
420
Grant Likely01ba1e92007-10-11 04:31:46 +1000421 /* Copy with the default pdata (not a ptr reference!) */
422 pdata = xilinx_fb_default_pdata;
423
Grant Likely31e8d462007-10-04 10:48:37 -0600424 dev_dbg(&op->dev, "xilinxfb_of_probe(%p, %p)\n", op, match);
425
426 rc = of_address_to_resource(op->node, 0, &res);
427 if (rc) {
428 dev_err(&op->dev, "invalid address\n");
429 return rc;
430 }
431
Grant Likelyb4d6a722007-10-11 04:31:51 +1000432 prop = of_get_property(op->node, "phys-size", &size);
Grant Likely31e8d462007-10-04 10:48:37 -0600433 if ((prop) && (size >= sizeof(u32)*2)) {
Grant Likely01ba1e92007-10-11 04:31:46 +1000434 pdata.screen_width_mm = prop[0];
435 pdata.screen_height_mm = prop[1];
Grant Likely31e8d462007-10-04 10:48:37 -0600436 }
437
Grant Likelyb4d6a722007-10-11 04:31:51 +1000438 prop = of_get_property(op->node, "resolution", &size);
439 if ((prop) && (size >= sizeof(u32)*2)) {
440 pdata.xres = prop[0];
441 pdata.yres = prop[1];
442 }
443
444 prop = of_get_property(op->node, "virtual-resolution", &size);
445 if ((prop) && (size >= sizeof(u32)*2)) {
446 pdata.xvirt = prop[0];
447 pdata.yvirt = prop[1];
448 }
449
Grant Likely31e8d462007-10-04 10:48:37 -0600450 if (of_find_property(op->node, "rotate-display", NULL))
Grant Likely01ba1e92007-10-11 04:31:46 +1000451 pdata.rotate_screen = 1;
Grant Likely31e8d462007-10-04 10:48:37 -0600452
Grant Likely01ba1e92007-10-11 04:31:46 +1000453 return xilinxfb_assign(&op->dev, res.start, &pdata);
Grant Likely31e8d462007-10-04 10:48:37 -0600454}
455
456static int __devexit xilinxfb_of_remove(struct of_device *op)
457{
458 return xilinxfb_release(&op->dev);
459}
460
461/* Match table for of_platform binding */
462static struct of_device_id __devinit xilinxfb_of_match[] = {
463 { .compatible = "xilinx,ml300-fb", },
464 {},
465};
466MODULE_DEVICE_TABLE(of, xilinxfb_of_match);
467
468static struct of_platform_driver xilinxfb_of_driver = {
469 .owner = THIS_MODULE,
470 .name = DRIVER_NAME,
471 .match_table = xilinxfb_of_match,
472 .probe = xilinxfb_of_probe,
473 .remove = __devexit_p(xilinxfb_of_remove),
474 .driver = {
475 .name = DRIVER_NAME,
476 },
477};
478
479/* Registration helpers to keep the number of #ifdefs to a minimum */
480static inline int __init xilinxfb_of_register(void)
481{
482 pr_debug("xilinxfb: calling of_register_platform_driver()\n");
483 return of_register_platform_driver(&xilinxfb_of_driver);
484}
485
486static inline void __exit xilinxfb_of_unregister(void)
487{
488 of_unregister_platform_driver(&xilinxfb_of_driver);
489}
490#else /* CONFIG_OF */
491/* CONFIG_OF not enabled; do nothing helpers */
492static inline int __init xilinxfb_of_register(void) { return 0; }
493static inline void __exit xilinxfb_of_unregister(void) { }
494#endif /* CONFIG_OF */
495
496/* ---------------------------------------------------------------------
497 * Module setup and teardown
498 */
499
Andrei Konovalov147394c2007-05-08 00:40:18 -0700500static int __init
501xilinxfb_init(void)
502{
Grant Likely31e8d462007-10-04 10:48:37 -0600503 int rc;
504 rc = xilinxfb_of_register();
505 if (rc)
506 return rc;
507
508 rc = platform_driver_register(&xilinxfb_platform_driver);
509 if (rc)
510 xilinxfb_of_unregister();
511
512 return rc;
Andrei Konovalov147394c2007-05-08 00:40:18 -0700513}
514
515static void __exit
516xilinxfb_cleanup(void)
517{
Grant Likely47473e32007-10-04 10:48:37 -0600518 platform_driver_unregister(&xilinxfb_platform_driver);
Grant Likely31e8d462007-10-04 10:48:37 -0600519 xilinxfb_of_unregister();
Andrei Konovalov147394c2007-05-08 00:40:18 -0700520}
521
522module_init(xilinxfb_init);
523module_exit(xilinxfb_cleanup);
524
525MODULE_AUTHOR("MontaVista Software, Inc. <source@mvista.com>");
526MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
527MODULE_LICENSE("GPL");