ARM: 7371/1: integrator: factor out dynamic amba device allocator
[linux-3.10.git] / arch / arm / mach-integrator / impd1.c
1 /*
2  *  linux/arch/arm/mach-integrator/impd1.c
3  *
4  *  Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  *
10  *  This file provides the core support for the IM-PD1 module.
11  *
12  * Module / boot parameters.
13  *   lmid=n   impd1.lmid=n - set the logic module position in stack to 'n'
14  */
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <linux/init.h>
18 #include <linux/device.h>
19 #include <linux/errno.h>
20 #include <linux/mm.h>
21 #include <linux/amba/bus.h>
22 #include <linux/amba/clcd.h>
23 #include <linux/io.h>
24 #include <linux/slab.h>
25 #include <linux/clkdev.h>
26
27 #include <asm/hardware/icst.h>
28 #include <mach/lm.h>
29 #include <mach/impd1.h>
30 #include <asm/sizes.h>
31
32 static int module_id;
33
34 module_param_named(lmid, module_id, int, 0444);
35 MODULE_PARM_DESC(lmid, "logic module stack position");
36
37 struct impd1_module {
38         void __iomem    *base;
39         struct clk      vcos[2];
40         struct clk_lookup *clks[3];
41 };
42
43 static const struct icst_params impd1_vco_params = {
44         .ref            = 24000000,     /* 24 MHz */
45         .vco_max        = ICST525_VCO_MAX_3V,
46         .vco_min        = ICST525_VCO_MIN,
47         .vd_min         = 12,
48         .vd_max         = 519,
49         .rd_min         = 3,
50         .rd_max         = 120,
51         .s2div          = icst525_s2div,
52         .idx2s          = icst525_idx2s,
53 };
54
55 static void impd1_setvco(struct clk *clk, struct icst_vco vco)
56 {
57         struct impd1_module *impd1 = clk->data;
58         u32 val = vco.v | (vco.r << 9) | (vco.s << 16);
59
60         writel(0xa05f, impd1->base + IMPD1_LOCK);
61         writel(val, clk->vcoreg);
62         writel(0, impd1->base + IMPD1_LOCK);
63
64 #ifdef DEBUG
65         vco.v = val & 0x1ff;
66         vco.r = (val >> 9) & 0x7f;
67         vco.s = (val >> 16) & 7;
68
69         pr_debug("IM-PD1: VCO%d clock is %ld Hz\n",
70                  vconr, icst525_hz(&impd1_vco_params, vco));
71 #endif
72 }
73
74 static const struct clk_ops impd1_clk_ops = {
75         .round  = icst_clk_round,
76         .set    = icst_clk_set,
77         .setvco = impd1_setvco,
78 };
79
80 void impd1_tweak_control(struct device *dev, u32 mask, u32 val)
81 {
82         struct impd1_module *impd1 = dev_get_drvdata(dev);
83         u32 cur;
84
85         val &= mask;
86         cur = readl(impd1->base + IMPD1_CTRL) & ~mask;
87         writel(cur | val, impd1->base + IMPD1_CTRL);
88 }
89
90 EXPORT_SYMBOL(impd1_tweak_control);
91
92 /*
93  * CLCD support
94  */
95 #define PANEL           PROSPECTOR
96
97 #define LTM10C209               1
98 #define PROSPECTOR              2
99 #define SVGA                    3
100 #define VGA                     4
101
102 #if PANEL == VGA
103 #define PANELTYPE       vga
104 static struct clcd_panel vga = {
105         .mode           = {
106                 .name           = "VGA",
107                 .refresh        = 60,
108                 .xres           = 640,
109                 .yres           = 480,
110                 .pixclock       = 39721,
111                 .left_margin    = 40,
112                 .right_margin   = 24,
113                 .upper_margin   = 32,
114                 .lower_margin   = 11,
115                 .hsync_len      = 96,
116                 .vsync_len      = 2,
117                 .sync           = 0,
118                 .vmode          = FB_VMODE_NONINTERLACED,
119         },
120         .width          = -1,
121         .height         = -1,
122         .tim2           = TIM2_BCD | TIM2_IPC,
123         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
124         .caps           = CLCD_CAP_5551,
125         .connector      = IMPD1_CTRL_DISP_VGA,
126         .bpp            = 16,
127         .grayscale      = 0,
128 };
129
130 #elif PANEL == SVGA
131 #define PANELTYPE       svga
132 static struct clcd_panel svga = {
133         .mode           = {
134                 .name           = "SVGA",
135                 .refresh        = 0,
136                 .xres           = 800,
137                 .yres           = 600,
138                 .pixclock       = 27778,
139                 .left_margin    = 20,
140                 .right_margin   = 20,
141                 .upper_margin   = 5,
142                 .lower_margin   = 5,
143                 .hsync_len      = 164,
144                 .vsync_len      = 62,
145                 .sync           = 0,
146                 .vmode          = FB_VMODE_NONINTERLACED,
147         },
148         .width          = -1,
149         .height         = -1,
150         .tim2           = TIM2_BCD,
151         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
152         .connector      = IMPD1_CTRL_DISP_VGA,
153         .caps           = CLCD_CAP_5551,
154         .bpp            = 16,
155         .grayscale      = 0,
156 };
157
158 #elif PANEL == PROSPECTOR
159 #define PANELTYPE       prospector
160 static struct clcd_panel prospector = {
161         .mode           = {
162                 .name           = "PROSPECTOR",
163                 .refresh        = 0,
164                 .xres           = 640,
165                 .yres           = 480,
166                 .pixclock       = 40000,
167                 .left_margin    = 33,
168                 .right_margin   = 64,
169                 .upper_margin   = 36,
170                 .lower_margin   = 7,
171                 .hsync_len      = 64,
172                 .vsync_len      = 25,
173                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
174                 .vmode          = FB_VMODE_NONINTERLACED,
175         },
176         .width          = -1,
177         .height         = -1,
178         .tim2           = TIM2_BCD,
179         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
180         .caps           = CLCD_CAP_5551,
181         .fixedtimings   = 1,
182         .connector      = IMPD1_CTRL_DISP_LCD,
183         .bpp            = 16,
184         .grayscale      = 0,
185 };
186
187 #elif PANEL == LTM10C209
188 #define PANELTYPE       ltm10c209
189 /*
190  * Untested.
191  */
192 static struct clcd_panel ltm10c209 = {
193         .mode           = {
194                 .name           = "LTM10C209",
195                 .refresh        = 0,
196                 .xres           = 640,
197                 .yres           = 480,
198                 .pixclock       = 40000,
199                 .left_margin    = 20,
200                 .right_margin   = 20,
201                 .upper_margin   = 19,
202                 .lower_margin   = 19,
203                 .hsync_len      = 20,
204                 .vsync_len      = 10,
205                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
206                 .vmode          = FB_VMODE_NONINTERLACED,
207         },
208         .width          = -1,
209         .height         = -1,
210         .tim2           = TIM2_BCD,
211         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
212         .caps           = CLCD_CAP_5551,
213         .fixedtimings   = 1,
214         .connector      = IMPD1_CTRL_DISP_LCD,
215         .bpp            = 16,
216         .grayscale      = 0,
217 };
218 #endif
219
220 /*
221  * Disable all display connectors on the interface module.
222  */
223 static void impd1fb_clcd_disable(struct clcd_fb *fb)
224 {
225         impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK, 0);
226 }
227
228 /*
229  * Enable the relevant connector on the interface module.
230  */
231 static void impd1fb_clcd_enable(struct clcd_fb *fb)
232 {
233         impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK,
234                         fb->panel->connector | IMPD1_CTRL_DISP_ENABLE);
235 }
236
237 static int impd1fb_clcd_setup(struct clcd_fb *fb)
238 {
239         unsigned long framebase = fb->dev->res.start + 0x01000000;
240         unsigned long framesize = SZ_1M;
241         int ret = 0;
242
243         fb->panel = &PANELTYPE;
244
245         if (!request_mem_region(framebase, framesize, "clcd framebuffer")) {
246                 printk(KERN_ERR "IM-PD1: unable to reserve framebuffer\n");
247                 return -EBUSY;
248         }
249
250         fb->fb.screen_base = ioremap(framebase, framesize);
251         if (!fb->fb.screen_base) {
252                 printk(KERN_ERR "IM-PD1: unable to map framebuffer\n");
253                 ret = -ENOMEM;
254                 goto free_buffer;
255         }
256
257         fb->fb.fix.smem_start   = framebase;
258         fb->fb.fix.smem_len     = framesize;
259
260         return 0;
261
262  free_buffer:
263         release_mem_region(framebase, framesize);
264         return ret;
265 }
266
267 static int impd1fb_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
268 {
269         unsigned long start, size;
270
271         start = vma->vm_pgoff + (fb->fb.fix.smem_start >> PAGE_SHIFT);
272         size = vma->vm_end - vma->vm_start;
273
274         return remap_pfn_range(vma, vma->vm_start, start, size,
275                                vma->vm_page_prot);
276 }
277
278 static void impd1fb_clcd_remove(struct clcd_fb *fb)
279 {
280         iounmap(fb->fb.screen_base);
281         release_mem_region(fb->fb.fix.smem_start, fb->fb.fix.smem_len);
282 }
283
284 static struct clcd_board impd1_clcd_data = {
285         .name           = "IM-PD/1",
286         .caps           = CLCD_CAP_5551 | CLCD_CAP_888,
287         .check          = clcdfb_check,
288         .decode         = clcdfb_decode,
289         .disable        = impd1fb_clcd_disable,
290         .enable         = impd1fb_clcd_enable,
291         .setup          = impd1fb_clcd_setup,
292         .mmap           = impd1fb_clcd_mmap,
293         .remove         = impd1fb_clcd_remove,
294 };
295
296 struct impd1_device {
297         unsigned long   offset;
298         unsigned int    irq[2];
299         unsigned int    id;
300         void            *platform_data;
301 };
302
303 static struct impd1_device impd1_devs[] = {
304         {
305                 .offset = 0x03000000,
306                 .id     = 0x00041190,
307         }, {
308                 .offset = 0x00100000,
309                 .irq    = { 1 },
310                 .id     = 0x00141011,
311         }, {
312                 .offset = 0x00200000,
313                 .irq    = { 2 },
314                 .id     = 0x00141011,
315         }, {
316                 .offset = 0x00300000,
317                 .irq    = { 3 },
318                 .id     = 0x00041022,
319         }, {
320                 .offset = 0x00400000,
321                 .irq    = { 4 },
322                 .id     = 0x00041061,
323         }, {
324                 .offset = 0x00500000,
325                 .irq    = { 5 },
326                 .id     = 0x00041061,
327         }, {
328                 .offset = 0x00600000,
329                 .irq    = { 6 },
330                 .id     = 0x00041130,
331         }, {
332                 .offset = 0x00700000,
333                 .irq    = { 7, 8 },
334                 .id     = 0x00041181,
335         }, {
336                 .offset = 0x00800000,
337                 .irq    = { 9 },
338                 .id     = 0x00041041,
339         }, {
340                 .offset = 0x01000000,
341                 .irq    = { 11 },
342                 .id     = 0x00041110,
343                 .platform_data = &impd1_clcd_data,
344         }
345 };
346
347 static struct clk fixed_14745600 = {
348         .rate = 14745600,
349 };
350
351 static int impd1_probe(struct lm_device *dev)
352 {
353         struct impd1_module *impd1;
354         int i, ret;
355
356         if (dev->id != module_id)
357                 return -EINVAL;
358
359         if (!request_mem_region(dev->resource.start, SZ_4K, "LM registers"))
360                 return -EBUSY;
361
362         impd1 = kzalloc(sizeof(struct impd1_module), GFP_KERNEL);
363         if (!impd1) {
364                 ret = -ENOMEM;
365                 goto release_lm;
366         }
367
368         impd1->base = ioremap(dev->resource.start, SZ_4K);
369         if (!impd1->base) {
370                 ret = -ENOMEM;
371                 goto free_impd1;
372         }
373
374         lm_set_drvdata(dev, impd1);
375
376         printk("IM-PD1 found at 0x%08lx\n",
377                 (unsigned long)dev->resource.start);
378
379         for (i = 0; i < ARRAY_SIZE(impd1->vcos); i++) {
380                 impd1->vcos[i].ops = &impd1_clk_ops,
381                 impd1->vcos[i].owner = THIS_MODULE,
382                 impd1->vcos[i].params = &impd1_vco_params,
383                 impd1->vcos[i].data = impd1;
384         }
385         impd1->vcos[0].vcoreg = impd1->base + IMPD1_OSC1;
386         impd1->vcos[1].vcoreg = impd1->base + IMPD1_OSC2;
387
388         impd1->clks[0] = clkdev_alloc(&impd1->vcos[0], NULL, "lm%x:01000",
389                                         dev->id);
390         impd1->clks[1] = clkdev_alloc(&fixed_14745600, NULL, "lm%x:00100",
391                                         dev->id);
392         impd1->clks[2] = clkdev_alloc(&fixed_14745600, NULL, "lm%x:00200",
393                                         dev->id);
394         for (i = 0; i < ARRAY_SIZE(impd1->clks); i++)
395                 clkdev_add(impd1->clks[i]);
396
397         for (i = 0; i < ARRAY_SIZE(impd1_devs); i++) {
398                 struct impd1_device *idev = impd1_devs + i;
399                 struct amba_device *d;
400                 unsigned long pc_base;
401                 char devname[32];
402
403                 pc_base = dev->resource.start + idev->offset;
404                 snprintf(devname, 32, "lm%x:%5.5lx", dev->id, idev->offset >> 12);
405                 d = amba_ahb_device_add(&dev->dev, devname, pc_base, SZ_4K,
406                                         dev->irq, dev->irq,
407                                         idev->platform_data, idev->id);
408                 if (IS_ERR(d)) {
409                         dev_err(&dev->dev, "unable to register device: %ld\n", PTR_ERR(d));
410                         continue;
411                 }
412         }
413
414         return 0;
415
416  free_impd1:
417         if (impd1 && impd1->base)
418                 iounmap(impd1->base);
419         kfree(impd1);
420  release_lm:
421         release_mem_region(dev->resource.start, SZ_4K);
422         return ret;
423 }
424
425 static int impd1_remove_one(struct device *dev, void *data)
426 {
427         device_unregister(dev);
428         return 0;
429 }
430
431 static void impd1_remove(struct lm_device *dev)
432 {
433         struct impd1_module *impd1 = lm_get_drvdata(dev);
434         int i;
435
436         device_for_each_child(&dev->dev, NULL, impd1_remove_one);
437
438         for (i = 0; i < ARRAY_SIZE(impd1->clks); i++)
439                 clkdev_drop(impd1->clks[i]);
440
441         lm_set_drvdata(dev, NULL);
442
443         iounmap(impd1->base);
444         kfree(impd1);
445         release_mem_region(dev->resource.start, SZ_4K);
446 }
447
448 static struct lm_driver impd1_driver = {
449         .drv = {
450                 .name   = "impd1",
451         },
452         .probe          = impd1_probe,
453         .remove         = impd1_remove,
454 };
455
456 static int __init impd1_init(void)
457 {
458         return lm_driver_register(&impd1_driver);
459 }
460
461 static void __exit impd1_exit(void)
462 {
463         lm_driver_unregister(&impd1_driver);
464 }
465
466 module_init(impd1_init);
467 module_exit(impd1_exit);
468
469 MODULE_LICENSE("GPL");
470 MODULE_DESCRIPTION("Integrator/IM-PD1 logic module core driver");
471 MODULE_AUTHOR("Deep Blue Solutions Ltd");