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21#include <linux/err.h>
22#include <linux/slab.h>
23#include <linux/module.h>
24#include <linux/init.h>
25#include <linux/device.h>
26#include <linux/io.h>
27#include <linux/dma-mapping.h>
28#include <linux/dmaengine.h>
29#include <linux/omap-dma.h>
30#include <mach/tc.h>
31
32#include "soc.h"
33
34#define OMAP1_DMA_BASE (0xfffed800)
35
36static u32 enable_1510_mode;
37
38static const struct omap_dma_reg reg_map[] = {
39 [GCR] = { 0x0400, 0x00, OMAP_DMA_REG_16BIT },
40 [GSCR] = { 0x0404, 0x00, OMAP_DMA_REG_16BIT },
41 [GRST1] = { 0x0408, 0x00, OMAP_DMA_REG_16BIT },
42 [HW_ID] = { 0x0442, 0x00, OMAP_DMA_REG_16BIT },
43 [PCH2_ID] = { 0x0444, 0x00, OMAP_DMA_REG_16BIT },
44 [PCH0_ID] = { 0x0446, 0x00, OMAP_DMA_REG_16BIT },
45 [PCH1_ID] = { 0x0448, 0x00, OMAP_DMA_REG_16BIT },
46 [PCHG_ID] = { 0x044a, 0x00, OMAP_DMA_REG_16BIT },
47 [PCHD_ID] = { 0x044c, 0x00, OMAP_DMA_REG_16BIT },
48 [CAPS_0] = { 0x044e, 0x00, OMAP_DMA_REG_2X16BIT },
49 [CAPS_1] = { 0x0452, 0x00, OMAP_DMA_REG_2X16BIT },
50 [CAPS_2] = { 0x0456, 0x00, OMAP_DMA_REG_16BIT },
51 [CAPS_3] = { 0x0458, 0x00, OMAP_DMA_REG_16BIT },
52 [CAPS_4] = { 0x045a, 0x00, OMAP_DMA_REG_16BIT },
53 [PCH2_SR] = { 0x0460, 0x00, OMAP_DMA_REG_16BIT },
54 [PCH0_SR] = { 0x0480, 0x00, OMAP_DMA_REG_16BIT },
55 [PCH1_SR] = { 0x0482, 0x00, OMAP_DMA_REG_16BIT },
56 [PCHD_SR] = { 0x04c0, 0x00, OMAP_DMA_REG_16BIT },
57
58
59 [CSDP] = { 0x0000, 0x40, OMAP_DMA_REG_16BIT },
60 [CCR] = { 0x0002, 0x40, OMAP_DMA_REG_16BIT },
61 [CICR] = { 0x0004, 0x40, OMAP_DMA_REG_16BIT },
62 [CSR] = { 0x0006, 0x40, OMAP_DMA_REG_16BIT },
63 [CEN] = { 0x0010, 0x40, OMAP_DMA_REG_16BIT },
64 [CFN] = { 0x0012, 0x40, OMAP_DMA_REG_16BIT },
65 [CSFI] = { 0x0014, 0x40, OMAP_DMA_REG_16BIT },
66 [CSEI] = { 0x0016, 0x40, OMAP_DMA_REG_16BIT },
67 [CPC] = { 0x0018, 0x40, OMAP_DMA_REG_16BIT },
68 [CSAC] = { 0x0018, 0x40, OMAP_DMA_REG_16BIT },
69 [CDAC] = { 0x001a, 0x40, OMAP_DMA_REG_16BIT },
70 [CDEI] = { 0x001c, 0x40, OMAP_DMA_REG_16BIT },
71 [CDFI] = { 0x001e, 0x40, OMAP_DMA_REG_16BIT },
72 [CLNK_CTRL] = { 0x0028, 0x40, OMAP_DMA_REG_16BIT },
73
74
75 [CSSA] = { 0x0008, 0x40, OMAP_DMA_REG_2X16BIT },
76 [CDSA] = { 0x000c, 0x40, OMAP_DMA_REG_2X16BIT },
77 [COLOR] = { 0x0020, 0x40, OMAP_DMA_REG_2X16BIT },
78 [CCR2] = { 0x0024, 0x40, OMAP_DMA_REG_16BIT },
79 [LCH_CTRL] = { 0x002a, 0x40, OMAP_DMA_REG_16BIT },
80};
81
82static struct resource res[] __initdata = {
83 [0] = {
84 .start = OMAP1_DMA_BASE,
85 .end = OMAP1_DMA_BASE + SZ_2K - 1,
86 .flags = IORESOURCE_MEM,
87 },
88 [1] = {
89 .name = "0",
90 .start = INT_DMA_CH0_6,
91 .flags = IORESOURCE_IRQ,
92 },
93 [2] = {
94 .name = "1",
95 .start = INT_DMA_CH1_7,
96 .flags = IORESOURCE_IRQ,
97 },
98 [3] = {
99 .name = "2",
100 .start = INT_DMA_CH2_8,
101 .flags = IORESOURCE_IRQ,
102 },
103 [4] = {
104 .name = "3",
105 .start = INT_DMA_CH3,
106 .flags = IORESOURCE_IRQ,
107 },
108 [5] = {
109 .name = "4",
110 .start = INT_DMA_CH4,
111 .flags = IORESOURCE_IRQ,
112 },
113 [6] = {
114 .name = "5",
115 .start = INT_DMA_CH5,
116 .flags = IORESOURCE_IRQ,
117 },
118
119 [7] = {
120 .name = "6",
121 .start = INT_1610_DMA_CH6,
122 .flags = IORESOURCE_IRQ,
123 },
124
125 [8] = {
126 .name = "7",
127 .start = INT_1610_DMA_CH7,
128 .flags = IORESOURCE_IRQ,
129 },
130 [9] = {
131 .name = "8",
132 .start = INT_1610_DMA_CH8,
133 .flags = IORESOURCE_IRQ,
134 },
135 [10] = {
136 .name = "9",
137 .start = INT_1610_DMA_CH9,
138 .flags = IORESOURCE_IRQ,
139 },
140 [11] = {
141 .name = "10",
142 .start = INT_1610_DMA_CH10,
143 .flags = IORESOURCE_IRQ,
144 },
145 [12] = {
146 .name = "11",
147 .start = INT_1610_DMA_CH11,
148 .flags = IORESOURCE_IRQ,
149 },
150 [13] = {
151 .name = "12",
152 .start = INT_1610_DMA_CH12,
153 .flags = IORESOURCE_IRQ,
154 },
155 [14] = {
156 .name = "13",
157 .start = INT_1610_DMA_CH13,
158 .flags = IORESOURCE_IRQ,
159 },
160 [15] = {
161 .name = "14",
162 .start = INT_1610_DMA_CH14,
163 .flags = IORESOURCE_IRQ,
164 },
165 [16] = {
166 .name = "15",
167 .start = INT_1610_DMA_CH15,
168 .flags = IORESOURCE_IRQ,
169 },
170 [17] = {
171 .name = "16",
172 .start = INT_DMA_LCD,
173 .flags = IORESOURCE_IRQ,
174 },
175};
176
177static void __iomem *dma_base;
178static inline void dma_write(u32 val, int reg, int lch)
179{
180 void __iomem *addr = dma_base;
181
182 addr += reg_map[reg].offset;
183 addr += reg_map[reg].stride * lch;
184
185 __raw_writew(val, addr);
186 if (reg_map[reg].type == OMAP_DMA_REG_2X16BIT)
187 __raw_writew(val >> 16, addr + 2);
188}
189
190static inline u32 dma_read(int reg, int lch)
191{
192 void __iomem *addr = dma_base;
193 uint32_t val;
194
195 addr += reg_map[reg].offset;
196 addr += reg_map[reg].stride * lch;
197
198 val = __raw_readw(addr);
199 if (reg_map[reg].type == OMAP_DMA_REG_2X16BIT)
200 val |= __raw_readw(addr + 2) << 16;
201
202 return val;
203}
204
205static void omap1_clear_lch_regs(int lch)
206{
207 int i;
208
209 for (i = CPC; i <= COLOR; i += 1)
210 dma_write(0, i, lch);
211}
212
213static void omap1_clear_dma(int lch)
214{
215 u32 l;
216
217 l = dma_read(CCR, lch);
218 l &= ~OMAP_DMA_CCR_EN;
219 dma_write(l, CCR, lch);
220
221
222 l = dma_read(CSR, lch);
223}
224
225static void omap1_show_dma_caps(void)
226{
227 if (enable_1510_mode) {
228 printk(KERN_INFO "DMA support for OMAP15xx initialized\n");
229 } else {
230 u16 w;
231 printk(KERN_INFO "OMAP DMA hardware version %d\n",
232 dma_read(HW_ID, 0));
233 printk(KERN_INFO "DMA capabilities: %08x:%08x:%04x:%04x:%04x\n",
234 dma_read(CAPS_0, 0), dma_read(CAPS_1, 0),
235 dma_read(CAPS_2, 0), dma_read(CAPS_3, 0),
236 dma_read(CAPS_4, 0));
237
238
239 w = dma_read(GSCR, 0);
240 w |= 1 << 3;
241 dma_write(w, GSCR, 0);
242 }
243}
244
245static unsigned configure_dma_errata(void)
246{
247 unsigned errata = 0;
248
249
250
251
252
253 if (!cpu_is_omap15xx())
254 SET_DMA_ERRATA(DMA_ERRATA_3_3);
255
256 return errata;
257}
258
259static const struct platform_device_info omap_dma_dev_info = {
260 .name = "omap-dma-engine",
261 .id = -1,
262 .dma_mask = DMA_BIT_MASK(32),
263 .res = res,
264 .num_res = 1,
265};
266
267
268static const struct dma_slave_map omap7xx_sdma_map[] = {
269 { "omap-mcbsp.1", "tx", SDMA_FILTER_PARAM(8) },
270 { "omap-mcbsp.1", "rx", SDMA_FILTER_PARAM(9) },
271 { "omap-mcbsp.2", "tx", SDMA_FILTER_PARAM(10) },
272 { "omap-mcbsp.2", "rx", SDMA_FILTER_PARAM(11) },
273 { "mmci-omap.0", "tx", SDMA_FILTER_PARAM(21) },
274 { "mmci-omap.0", "rx", SDMA_FILTER_PARAM(22) },
275 { "omap_udc", "rx0", SDMA_FILTER_PARAM(26) },
276 { "omap_udc", "rx1", SDMA_FILTER_PARAM(27) },
277 { "omap_udc", "rx2", SDMA_FILTER_PARAM(28) },
278 { "omap_udc", "tx0", SDMA_FILTER_PARAM(29) },
279 { "omap_udc", "tx1", SDMA_FILTER_PARAM(30) },
280 { "omap_udc", "tx2", SDMA_FILTER_PARAM(31) },
281};
282
283
284static const struct dma_slave_map omap1xxx_sdma_map[] = {
285 { "omap-mcbsp.1", "tx", SDMA_FILTER_PARAM(8) },
286 { "omap-mcbsp.1", "rx", SDMA_FILTER_PARAM(9) },
287 { "omap-mcbsp.3", "tx", SDMA_FILTER_PARAM(10) },
288 { "omap-mcbsp.3", "rx", SDMA_FILTER_PARAM(11) },
289 { "omap-mcbsp.2", "tx", SDMA_FILTER_PARAM(16) },
290 { "omap-mcbsp.2", "rx", SDMA_FILTER_PARAM(17) },
291 { "mmci-omap.0", "tx", SDMA_FILTER_PARAM(21) },
292 { "mmci-omap.0", "rx", SDMA_FILTER_PARAM(22) },
293 { "omap_udc", "rx0", SDMA_FILTER_PARAM(26) },
294 { "omap_udc", "rx1", SDMA_FILTER_PARAM(27) },
295 { "omap_udc", "rx2", SDMA_FILTER_PARAM(28) },
296 { "omap_udc", "tx0", SDMA_FILTER_PARAM(29) },
297 { "omap_udc", "tx1", SDMA_FILTER_PARAM(30) },
298 { "omap_udc", "tx2", SDMA_FILTER_PARAM(31) },
299 { "mmci-omap.1", "tx", SDMA_FILTER_PARAM(54) },
300 { "mmci-omap.1", "rx", SDMA_FILTER_PARAM(55) },
301};
302
303static struct omap_system_dma_plat_info dma_plat_info __initdata = {
304 .reg_map = reg_map,
305 .channel_stride = 0x40,
306 .show_dma_caps = omap1_show_dma_caps,
307 .clear_lch_regs = omap1_clear_lch_regs,
308 .clear_dma = omap1_clear_dma,
309 .dma_write = dma_write,
310 .dma_read = dma_read,
311};
312
313static int __init omap1_system_dma_init(void)
314{
315 struct omap_system_dma_plat_info p;
316 struct omap_dma_dev_attr *d;
317 struct platform_device *pdev, *dma_pdev;
318 int ret;
319
320 pdev = platform_device_alloc("omap_dma_system", 0);
321 if (!pdev) {
322 pr_err("%s: Unable to device alloc for dma\n",
323 __func__);
324 return -ENOMEM;
325 }
326
327 dma_base = ioremap(res[0].start, resource_size(&res[0]));
328 if (!dma_base) {
329 pr_err("%s: Unable to ioremap\n", __func__);
330 ret = -ENODEV;
331 goto exit_device_put;
332 }
333
334 ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
335 if (ret) {
336 dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
337 __func__, pdev->name, pdev->id);
338 goto exit_iounmap;
339 }
340
341 d = kzalloc(sizeof(*d), GFP_KERNEL);
342 if (!d) {
343 ret = -ENOMEM;
344 goto exit_iounmap;
345 }
346
347
348 if (cpu_is_omap15xx())
349 d->dev_caps = ENABLE_1510_MODE;
350 enable_1510_mode = d->dev_caps & ENABLE_1510_MODE;
351
352 if (cpu_is_omap16xx())
353 d->dev_caps = ENABLE_16XX_MODE;
354
355 d->dev_caps |= SRC_PORT;
356 d->dev_caps |= DST_PORT;
357 d->dev_caps |= SRC_INDEX;
358 d->dev_caps |= DST_INDEX;
359 d->dev_caps |= IS_BURST_ONLY4;
360 d->dev_caps |= CLEAR_CSR_ON_READ;
361 d->dev_caps |= IS_WORD_16;
362
363
364 if (cpu_is_omap15xx()) {
365 d->lch_count = 9;
366 } else {
367 if (d->dev_caps & ENABLE_1510_MODE)
368 d->lch_count = 9;
369 else
370 d->lch_count = 16;
371 }
372
373 p = dma_plat_info;
374 p.dma_attr = d;
375 p.errata = configure_dma_errata();
376
377 if (cpu_is_omap7xx()) {
378 p.slave_map = omap7xx_sdma_map;
379 p.slavecnt = ARRAY_SIZE(omap7xx_sdma_map);
380 } else {
381 p.slave_map = omap1xxx_sdma_map;
382 p.slavecnt = ARRAY_SIZE(omap1xxx_sdma_map);
383 }
384
385 ret = platform_device_add_data(pdev, &p, sizeof(p));
386 if (ret) {
387 dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
388 __func__, pdev->name, pdev->id);
389 goto exit_release_d;
390 }
391
392 ret = platform_device_add(pdev);
393 if (ret) {
394 dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
395 __func__, pdev->name, pdev->id);
396 goto exit_release_d;
397 }
398
399 dma_pdev = platform_device_register_full(&omap_dma_dev_info);
400 if (IS_ERR(dma_pdev)) {
401 ret = PTR_ERR(dma_pdev);
402 goto exit_release_pdev;
403 }
404
405 return ret;
406
407exit_release_pdev:
408 platform_device_del(pdev);
409exit_release_d:
410 kfree(d);
411exit_iounmap:
412 iounmap(dma_base);
413exit_device_put:
414 platform_device_put(pdev);
415
416 return ret;
417}
418arch_initcall(omap1_system_dma_init);
419
