Linux Kernel  3.7.1
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devices.c
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1 /*
2  * mach-davinci/devices.c
3  *
4  * DaVinci platform device setup/initialization
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 as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  */
11 
12 #include <linux/init.h>
13 #include <linux/platform_device.h>
14 #include <linux/dma-mapping.h>
15 #include <linux/io.h>
16 
17 #include <mach/hardware.h>
19 #include <mach/irqs.h>
20 #include <mach/cputype.h>
21 #include <mach/mux.h>
22 #include <mach/edma.h>
24 #include <mach/time.h>
25 
26 #include "davinci.h"
27 #include "clock.h"
28 
29 #define DAVINCI_I2C_BASE 0x01C21000
30 #define DAVINCI_ATA_BASE 0x01C66000
31 #define DAVINCI_MMCSD0_BASE 0x01E10000
32 #define DM355_MMCSD0_BASE 0x01E11000
33 #define DM355_MMCSD1_BASE 0x01E00000
34 #define DM365_MMCSD0_BASE 0x01D11000
35 #define DM365_MMCSD1_BASE 0x01D00000
36 
38 
40 {
42  0x800);
43  /*
44  * Throw a bug since a lot of board initialization code depends
45  * on system module availability. ioremap() failing this early
46  * need careful looking into anyway.
47  */
49 }
50 
51 static struct resource i2c_resources[] = {
52  {
53  .start = DAVINCI_I2C_BASE,
54  .end = DAVINCI_I2C_BASE + 0x40,
55  .flags = IORESOURCE_MEM,
56  },
57  {
58  .start = IRQ_I2C,
59  .flags = IORESOURCE_IRQ,
60  },
61 };
62 
63 static struct platform_device davinci_i2c_device = {
64  .name = "i2c_davinci",
65  .id = 1,
66  .num_resources = ARRAY_SIZE(i2c_resources),
67  .resource = i2c_resources,
68 };
69 
71 {
74 
75  davinci_i2c_device.dev.platform_data = pdata;
76  (void) platform_device_register(&davinci_i2c_device);
77 }
78 
79 static struct resource ide_resources[] = {
80  {
81  .start = DAVINCI_ATA_BASE,
82  .end = DAVINCI_ATA_BASE + 0x7ff,
83  .flags = IORESOURCE_MEM,
84  },
85  {
86  .start = IRQ_IDE,
87  .end = IRQ_IDE,
88  .flags = IORESOURCE_IRQ,
89  },
90 };
91 
92 static u64 ide_dma_mask = DMA_BIT_MASK(32);
93 
94 static struct platform_device ide_device = {
95  .name = "palm_bk3710",
96  .id = -1,
97  .resource = ide_resources,
98  .num_resources = ARRAY_SIZE(ide_resources),
99  .dev = {
100  .dma_mask = &ide_dma_mask,
101  .coherent_dma_mask = DMA_BIT_MASK(32),
102  },
103 };
104 
106 {
107  if (cpu_is_davinci_dm644x()) {
111  } else if (cpu_is_davinci_dm646x()) {
112  /* IRQ_DM646X_IDE is the same as IRQ_IDE */
114  } else {
115  WARN_ON(1);
116  return;
117  }
118 
119  platform_device_register(&ide_device);
120 }
121 
122 #if defined(CONFIG_MMC_DAVINCI) || defined(CONFIG_MMC_DAVINCI_MODULE)
123 
124 static u64 mmcsd0_dma_mask = DMA_BIT_MASK(32);
125 
126 static struct resource mmcsd0_resources[] = {
127  {
128  /* different on dm355 */
130  .end = DAVINCI_MMCSD0_BASE + SZ_4K - 1,
131  .flags = IORESOURCE_MEM,
132  },
133  /* IRQs: MMC/SD, then SDIO */
134  {
135  .start = IRQ_MMCINT,
136  .flags = IORESOURCE_IRQ,
137  }, {
138  /* different on dm355 */
139  .start = IRQ_SDIOINT,
140  .flags = IORESOURCE_IRQ,
141  },
142  /* DMA channels: RX, then TX */
143  {
145  .flags = IORESOURCE_DMA,
146  }, {
148  .flags = IORESOURCE_DMA,
149  },
150 };
151 
152 static struct platform_device davinci_mmcsd0_device = {
153  .name = "davinci_mmc",
154  .id = 0,
155  .dev = {
156  .dma_mask = &mmcsd0_dma_mask,
157  .coherent_dma_mask = DMA_BIT_MASK(32),
158  },
159  .num_resources = ARRAY_SIZE(mmcsd0_resources),
160  .resource = mmcsd0_resources,
161 };
162 
163 static u64 mmcsd1_dma_mask = DMA_BIT_MASK(32);
164 
165 static struct resource mmcsd1_resources[] = {
166  {
168  .end = DM355_MMCSD1_BASE + SZ_4K - 1,
169  .flags = IORESOURCE_MEM,
170  },
171  /* IRQs: MMC/SD, then SDIO */
172  {
173  .start = IRQ_DM355_MMCINT1,
174  .flags = IORESOURCE_IRQ,
175  }, {
176  .start = IRQ_DM355_SDIOINT1,
177  .flags = IORESOURCE_IRQ,
178  },
179  /* DMA channels: RX, then TX */
180  {
181  .start = EDMA_CTLR_CHAN(0, 30), /* rx */
182  .flags = IORESOURCE_DMA,
183  }, {
184  .start = EDMA_CTLR_CHAN(0, 31), /* tx */
185  .flags = IORESOURCE_DMA,
186  },
187 };
188 
189 static struct platform_device davinci_mmcsd1_device = {
190  .name = "davinci_mmc",
191  .id = 1,
192  .dev = {
193  .dma_mask = &mmcsd1_dma_mask,
194  .coherent_dma_mask = DMA_BIT_MASK(32),
195  },
196  .num_resources = ARRAY_SIZE(mmcsd1_resources),
197  .resource = mmcsd1_resources,
198 };
199 
200 
202 {
203  struct platform_device *pdev = NULL;
204 
206  return;
207 
208  /* REVISIT: update PINMUX, ARM_IRQMUX, and EDMA_EVTMUX here too;
209  * for example if MMCSD1 is used for SDIO, maybe DAT2 is unused.
210  *
211  * FIXME dm6441 (no MMC/SD), dm357 (one), and dm335 (two) are
212  * not handled right here ...
213  */
214  switch (module) {
215  case 1:
216  if (cpu_is_davinci_dm355()) {
217  /* REVISIT we may not need all these pins if e.g. this
218  * is a hard-wired SDIO device...
219  */
226  } else if (cpu_is_davinci_dm365()) {
227  /* Configure pull down control */
228  unsigned v;
229 
231  __raw_writel(v & ~0xfc0,
233 
234  mmcsd1_resources[0].start = DM365_MMCSD1_BASE;
235  mmcsd1_resources[0].end = DM365_MMCSD1_BASE +
236  SZ_4K - 1;
237  mmcsd1_resources[2].start = IRQ_DM365_SDIOINT1;
238  } else
239  break;
240 
241  pdev = &davinci_mmcsd1_device;
242  break;
243  case 0:
244  if (cpu_is_davinci_dm355()) {
245  mmcsd0_resources[0].start = DM355_MMCSD0_BASE;
246  mmcsd0_resources[0].end = DM355_MMCSD0_BASE + SZ_4K - 1;
247  mmcsd0_resources[2].start = IRQ_DM355_SDIOINT0;
248 
249  /* expose all 6 MMC0 signals: CLK, CMD, DATA[0..3] */
251 
252  /* enable RX EDMA */
254  } else if (cpu_is_davinci_dm365()) {
255  mmcsd0_resources[0].start = DM365_MMCSD0_BASE;
256  mmcsd0_resources[0].end = DM365_MMCSD0_BASE +
257  SZ_4K - 1;
258  mmcsd0_resources[2].start = IRQ_DM365_SDIOINT0;
259  } else if (cpu_is_davinci_dm644x()) {
260  /* REVISIT: should this be in board-init code? */
261  /* Power-on 3.3V IO cells */
262  __raw_writel(0,
264  /*Set up the pull regiter for MMC */
266  }
267 
268  pdev = &davinci_mmcsd0_device;
269  break;
270  }
271 
272  if (WARN_ON(!pdev))
273  return;
274 
275  pdev->dev.platform_data = config;
277 }
278 
279 #else
280 
281 void __init davinci_setup_mmc(int module, struct davinci_mmc_config *config)
282 {
283 }
284 
285 #endif
286 
287 /*-------------------------------------------------------------------------*/
288 
289 static struct resource wdt_resources[] = {
290  {
291  .start = DAVINCI_WDOG_BASE,
292  .end = DAVINCI_WDOG_BASE + SZ_1K - 1,
293  .flags = IORESOURCE_MEM,
294  },
295 };
296 
298  .name = "watchdog",
299  .id = -1,
300  .num_resources = ARRAY_SIZE(wdt_resources),
301  .resource = wdt_resources,
302 };
303 
304 void davinci_restart(char mode, const char *cmd)
305 {
306  davinci_watchdog_reset(&davinci_wdt_device);
307 }
308 
309 static void davinci_init_wdt(void)
310 {
311  platform_device_register(&davinci_wdt_device);
312 }
313 
314 /*-------------------------------------------------------------------------*/
315 
316 /*-------------------------------------------------------------------------*/
317 
319  {
321  .bottom_irq = IRQ_TINT0_TINT12,
322  .top_irq = IRQ_TINT0_TINT34,
323  },
324  {
325  .base = DAVINCI_TIMER1_BASE,
326  .bottom_irq = IRQ_TINT1_TINT12,
327  .top_irq = IRQ_TINT1_TINT34,
328  },
329 };
330 
331 /*-------------------------------------------------------------------------*/
332 
333 static int __init davinci_init_devices(void)
334 {
335  /* please keep these calls, and their implementations above,
336  * in alphabetical order so they're easier to sort through.
337  */
338  davinci_init_wdt();
339 
340  return 0;
341 }
342 arch_initcall(davinci_init_devices);
343