1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * arch/arm/mach-spear6xx/spear6xx.c
4 *
5 * SPEAr6XX machines common source file
6 *
7 * Copyright (C) 2009 ST Microelectronics
8 * Rajeev Kumar<rajeev-dlh.kumar@st.com>
9 *
10 * Copyright 2012 Stefan Roese <sr@denx.de>
11 */
12
13 #include <linux/amba/pl08x.h>
14 #include <linux/clk.h>
15 #include <linux/clk/spear.h>
16 #include <linux/err.h>
17 #include <linux/of.h>
18 #include <linux/of_address.h>
19 #include <linux/of_platform.h>
20 #include <linux/amba/pl080.h>
21 #include <asm/mach/arch.h>
22 #include <asm/mach/time.h>
23 #include <asm/mach/map.h>
24 #include "pl080.h"
25 #include "generic.h"
26 #include "spear.h"
27 #include "misc_regs.h"
28
29 /* dmac device registration */
30 static struct pl08x_channel_data spear600_dma_info[] = {
31 {
32 .bus_id = "ssp1_rx",
33 .min_signal = 0,
34 .max_signal = 0,
35 .muxval = 0,
36 .periph_buses = PL08X_AHB1,
37 }, {
38 .bus_id = "ssp1_tx",
39 .min_signal = 1,
40 .max_signal = 1,
41 .muxval = 0,
42 .periph_buses = PL08X_AHB1,
43 }, {
44 .bus_id = "uart0_rx",
45 .min_signal = 2,
46 .max_signal = 2,
47 .muxval = 0,
48 .periph_buses = PL08X_AHB1,
49 }, {
50 .bus_id = "uart0_tx",
51 .min_signal = 3,
52 .max_signal = 3,
53 .muxval = 0,
54 .periph_buses = PL08X_AHB1,
55 }, {
56 .bus_id = "uart1_rx",
57 .min_signal = 4,
58 .max_signal = 4,
59 .muxval = 0,
60 .periph_buses = PL08X_AHB1,
61 }, {
62 .bus_id = "uart1_tx",
63 .min_signal = 5,
64 .max_signal = 5,
65 .muxval = 0,
66 .periph_buses = PL08X_AHB1,
67 }, {
68 .bus_id = "ssp2_rx",
69 .min_signal = 6,
70 .max_signal = 6,
71 .muxval = 0,
72 .periph_buses = PL08X_AHB2,
73 }, {
74 .bus_id = "ssp2_tx",
75 .min_signal = 7,
76 .max_signal = 7,
77 .muxval = 0,
78 .periph_buses = PL08X_AHB2,
79 }, {
80 .bus_id = "ssp0_rx",
81 .min_signal = 8,
82 .max_signal = 8,
83 .muxval = 0,
84 .periph_buses = PL08X_AHB1,
85 }, {
86 .bus_id = "ssp0_tx",
87 .min_signal = 9,
88 .max_signal = 9,
89 .muxval = 0,
90 .periph_buses = PL08X_AHB1,
91 }, {
92 .bus_id = "i2c_rx",
93 .min_signal = 10,
94 .max_signal = 10,
95 .muxval = 0,
96 .periph_buses = PL08X_AHB1,
97 }, {
98 .bus_id = "i2c_tx",
99 .min_signal = 11,
100 .max_signal = 11,
101 .muxval = 0,
102 .periph_buses = PL08X_AHB1,
103 }, {
104 .bus_id = "irda",
105 .min_signal = 12,
106 .max_signal = 12,
107 .muxval = 0,
108 .periph_buses = PL08X_AHB1,
109 }, {
110 .bus_id = "adc",
111 .min_signal = 13,
112 .max_signal = 13,
113 .muxval = 0,
114 .periph_buses = PL08X_AHB2,
115 }, {
116 .bus_id = "to_jpeg",
117 .min_signal = 14,
118 .max_signal = 14,
119 .muxval = 0,
120 .periph_buses = PL08X_AHB1,
121 }, {
122 .bus_id = "from_jpeg",
123 .min_signal = 15,
124 .max_signal = 15,
125 .muxval = 0,
126 .periph_buses = PL08X_AHB1,
127 }, {
128 .bus_id = "ras0_rx",
129 .min_signal = 0,
130 .max_signal = 0,
131 .muxval = 1,
132 .periph_buses = PL08X_AHB1,
133 }, {
134 .bus_id = "ras0_tx",
135 .min_signal = 1,
136 .max_signal = 1,
137 .muxval = 1,
138 .periph_buses = PL08X_AHB1,
139 }, {
140 .bus_id = "ras1_rx",
141 .min_signal = 2,
142 .max_signal = 2,
143 .muxval = 1,
144 .periph_buses = PL08X_AHB1,
145 }, {
146 .bus_id = "ras1_tx",
147 .min_signal = 3,
148 .max_signal = 3,
149 .muxval = 1,
150 .periph_buses = PL08X_AHB1,
151 }, {
152 .bus_id = "ras2_rx",
153 .min_signal = 4,
154 .max_signal = 4,
155 .muxval = 1,
156 .periph_buses = PL08X_AHB1,
157 }, {
158 .bus_id = "ras2_tx",
159 .min_signal = 5,
160 .max_signal = 5,
161 .muxval = 1,
162 .periph_buses = PL08X_AHB1,
163 }, {
164 .bus_id = "ras3_rx",
165 .min_signal = 6,
166 .max_signal = 6,
167 .muxval = 1,
168 .periph_buses = PL08X_AHB1,
169 }, {
170 .bus_id = "ras3_tx",
171 .min_signal = 7,
172 .max_signal = 7,
173 .muxval = 1,
174 .periph_buses = PL08X_AHB1,
175 }, {
176 .bus_id = "ras4_rx",
177 .min_signal = 8,
178 .max_signal = 8,
179 .muxval = 1,
180 .periph_buses = PL08X_AHB1,
181 }, {
182 .bus_id = "ras4_tx",
183 .min_signal = 9,
184 .max_signal = 9,
185 .muxval = 1,
186 .periph_buses = PL08X_AHB1,
187 }, {
188 .bus_id = "ras5_rx",
189 .min_signal = 10,
190 .max_signal = 10,
191 .muxval = 1,
192 .periph_buses = PL08X_AHB1,
193 }, {
194 .bus_id = "ras5_tx",
195 .min_signal = 11,
196 .max_signal = 11,
197 .muxval = 1,
198 .periph_buses = PL08X_AHB1,
199 }, {
200 .bus_id = "ras6_rx",
201 .min_signal = 12,
202 .max_signal = 12,
203 .muxval = 1,
204 .periph_buses = PL08X_AHB1,
205 }, {
206 .bus_id = "ras6_tx",
207 .min_signal = 13,
208 .max_signal = 13,
209 .muxval = 1,
210 .periph_buses = PL08X_AHB1,
211 }, {
212 .bus_id = "ras7_rx",
213 .min_signal = 14,
214 .max_signal = 14,
215 .muxval = 1,
216 .periph_buses = PL08X_AHB1,
217 }, {
218 .bus_id = "ras7_tx",
219 .min_signal = 15,
220 .max_signal = 15,
221 .muxval = 1,
222 .periph_buses = PL08X_AHB1,
223 }, {
224 .bus_id = "ext0_rx",
225 .min_signal = 0,
226 .max_signal = 0,
227 .muxval = 2,
228 .periph_buses = PL08X_AHB2,
229 }, {
230 .bus_id = "ext0_tx",
231 .min_signal = 1,
232 .max_signal = 1,
233 .muxval = 2,
234 .periph_buses = PL08X_AHB2,
235 }, {
236 .bus_id = "ext1_rx",
237 .min_signal = 2,
238 .max_signal = 2,
239 .muxval = 2,
240 .periph_buses = PL08X_AHB2,
241 }, {
242 .bus_id = "ext1_tx",
243 .min_signal = 3,
244 .max_signal = 3,
245 .muxval = 2,
246 .periph_buses = PL08X_AHB2,
247 }, {
248 .bus_id = "ext2_rx",
249 .min_signal = 4,
250 .max_signal = 4,
251 .muxval = 2,
252 .periph_buses = PL08X_AHB2,
253 }, {
254 .bus_id = "ext2_tx",
255 .min_signal = 5,
256 .max_signal = 5,
257 .muxval = 2,
258 .periph_buses = PL08X_AHB2,
259 }, {
260 .bus_id = "ext3_rx",
261 .min_signal = 6,
262 .max_signal = 6,
263 .muxval = 2,
264 .periph_buses = PL08X_AHB2,
265 }, {
266 .bus_id = "ext3_tx",
267 .min_signal = 7,
268 .max_signal = 7,
269 .muxval = 2,
270 .periph_buses = PL08X_AHB2,
271 }, {
272 .bus_id = "ext4_rx",
273 .min_signal = 8,
274 .max_signal = 8,
275 .muxval = 2,
276 .periph_buses = PL08X_AHB2,
277 }, {
278 .bus_id = "ext4_tx",
279 .min_signal = 9,
280 .max_signal = 9,
281 .muxval = 2,
282 .periph_buses = PL08X_AHB2,
283 }, {
284 .bus_id = "ext5_rx",
285 .min_signal = 10,
286 .max_signal = 10,
287 .muxval = 2,
288 .periph_buses = PL08X_AHB2,
289 }, {
290 .bus_id = "ext5_tx",
291 .min_signal = 11,
292 .max_signal = 11,
293 .muxval = 2,
294 .periph_buses = PL08X_AHB2,
295 }, {
296 .bus_id = "ext6_rx",
297 .min_signal = 12,
298 .max_signal = 12,
299 .muxval = 2,
300 .periph_buses = PL08X_AHB2,
301 }, {
302 .bus_id = "ext6_tx",
303 .min_signal = 13,
304 .max_signal = 13,
305 .muxval = 2,
306 .periph_buses = PL08X_AHB2,
307 }, {
308 .bus_id = "ext7_rx",
309 .min_signal = 14,
310 .max_signal = 14,
311 .muxval = 2,
312 .periph_buses = PL08X_AHB2,
313 }, {
314 .bus_id = "ext7_tx",
315 .min_signal = 15,
316 .max_signal = 15,
317 .muxval = 2,
318 .periph_buses = PL08X_AHB2,
319 },
320 };
321
322 static struct pl08x_platform_data spear6xx_pl080_plat_data = {
323 .memcpy_burst_size = PL08X_BURST_SZ_16,
324 .memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
325 .memcpy_prot_buff = true,
326 .memcpy_prot_cache = true,
327 .lli_buses = PL08X_AHB1,
328 .mem_buses = PL08X_AHB1,
329 .get_xfer_signal = pl080_get_signal,
330 .put_xfer_signal = pl080_put_signal,
331 .slave_channels = spear600_dma_info,
332 .num_slave_channels = ARRAY_SIZE(spear600_dma_info),
333 };
334
335 /*
336 * Following will create 16MB static virtual/physical mappings
337 * PHYSICAL VIRTUAL
338 * 0xF0000000 0xF0000000
339 * 0xF1000000 0xF1000000
340 * 0xD0000000 0xFD000000
341 * 0xFC000000 0xFC000000
342 */
343 static struct map_desc spear6xx_io_desc[] __initdata = {
344 {
345 .virtual = (unsigned long)VA_SPEAR6XX_ML_CPU_BASE,
346 .pfn = __phys_to_pfn(SPEAR_ICM3_ML1_2_BASE),
347 .length = 2 * SZ_16M,
348 .type = MT_DEVICE
349 }, {
350 .virtual = (unsigned long)VA_SPEAR_ICM1_2_BASE,
351 .pfn = __phys_to_pfn(SPEAR_ICM1_2_BASE),
352 .length = SZ_16M,
353 .type = MT_DEVICE
354 }, {
355 .virtual = (unsigned long)VA_SPEAR_ICM3_SMI_CTRL_BASE,
356 .pfn = __phys_to_pfn(SPEAR_ICM3_SMI_CTRL_BASE),
357 .length = SZ_16M,
358 .type = MT_DEVICE
359 },
360 };
361
362 /* This will create static memory mapping for selected devices */
363 static void __init spear6xx_map_io(void)
364 {
365 iotable_init(spear6xx_io_desc, ARRAY_SIZE(spear6xx_io_desc));
366 }
367
368 static void __init spear6xx_timer_init(void)
369 {
370 char pclk_name[] = "pll3_clk";
371 struct clk *gpt_clk, *pclk;
372
373 spear6xx_clk_init(MISC_BASE);
374
375 /* get the system timer clock */
376 gpt_clk = clk_get_sys("gpt0", NULL);
377 if (IS_ERR(gpt_clk)) {
378 pr_err("%s:couldn't get clk for gpt\n", __func__);
379 BUG();
380 }
381
382 /* get the suitable parent clock for timer*/
383 pclk = clk_get(NULL, pclk_name);
384 if (IS_ERR(pclk)) {
385 pr_err("%s:couldn't get %s as parent for gpt\n",
386 __func__, pclk_name);
387 BUG();
388 }
389
390 clk_set_parent(gpt_clk, pclk);
391 clk_put(gpt_clk);
392 clk_put(pclk);
393
394 spear_setup_of_timer();
395 }
396
397 /* Add auxdata to pass platform data */
398 static struct of_dev_auxdata spear6xx_auxdata_lookup[] __initdata = {
399 OF_DEV_AUXDATA("arm,pl080", SPEAR_ICM3_DMA_BASE, NULL,
400 &spear6xx_pl080_plat_data),
401 {}
402 };
403
404 static void __init spear600_dt_init(void)
405 {
406 of_platform_default_populate(NULL, spear6xx_auxdata_lookup, NULL);
407 }
408
409 static const char *spear600_dt_board_compat[] = {
410 "st,spear600",
411 NULL
412 };
413
414 DT_MACHINE_START(SPEAR600_DT, "ST SPEAr600 (Flattened Device Tree)")
415 .map_io = spear6xx_map_io,
416 .init_time = spear6xx_timer_init,
417 .init_machine = spear600_dt_init,
418 .restart = spear_restart,
419 .dt_compat = spear600_dt_board_compat,
420 MACHINE_END
421
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