xref: /openbmc/linux/arch/arm/mach-omap1/devices.c (revision c729baa8)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * linux/arch/arm/mach-omap1/devices.c
4  *
5  * OMAP1 platform device setup/initialization
6  */
7 
8 #include <linux/dma-mapping.h>
9 #include <linux/module.h>
10 #include <linux/kernel.h>
11 #include <linux/init.h>
12 #include <linux/platform_device.h>
13 #include <linux/spi/spi.h>
14 
15 #include <linux/platform_data/omap-wd-timer.h>
16 #include <linux/soc/ti/omap1-io.h>
17 
18 #include <asm/mach/map.h>
19 
20 #include "tc.h"
21 #include "mux.h"
22 
23 #include "hardware.h"
24 #include "common.h"
25 #include "clock.h"
26 #include "mmc.h"
27 #include "sram.h"
28 
29 #if IS_ENABLED(CONFIG_RTC_DRV_OMAP)
30 
31 #define	OMAP_RTC_BASE		0xfffb4800
32 
33 static struct resource rtc_resources[] = {
34 	{
35 		.start		= OMAP_RTC_BASE,
36 		.end		= OMAP_RTC_BASE + 0x5f,
37 		.flags		= IORESOURCE_MEM,
38 	},
39 	{
40 		.start		= INT_RTC_TIMER,
41 		.flags		= IORESOURCE_IRQ,
42 	},
43 	{
44 		.start		= INT_RTC_ALARM,
45 		.flags		= IORESOURCE_IRQ,
46 	},
47 };
48 
49 static struct platform_device omap_rtc_device = {
50 	.name           = "omap_rtc",
51 	.id             = -1,
52 	.num_resources	= ARRAY_SIZE(rtc_resources),
53 	.resource	= rtc_resources,
54 };
55 
omap_init_rtc(void)56 static void omap_init_rtc(void)
57 {
58 	(void) platform_device_register(&omap_rtc_device);
59 }
60 #else
omap_init_rtc(void)61 static inline void omap_init_rtc(void) {}
62 #endif
63 
64 /*-------------------------------------------------------------------------*/
65 
66 #if IS_ENABLED(CONFIG_MMC_OMAP)
67 
omap1_mmc_mux(struct omap_mmc_platform_data * mmc_controller,int controller_nr)68 static inline void omap1_mmc_mux(struct omap_mmc_platform_data *mmc_controller,
69 			int controller_nr)
70 {
71 	if (controller_nr == 0) {
72 		omap_cfg_reg(MMC_CMD);
73 		omap_cfg_reg(MMC_CLK);
74 		omap_cfg_reg(MMC_DAT0);
75 
76 		if (cpu_is_omap1710()) {
77 			omap_cfg_reg(M15_1710_MMC_CLKI);
78 			omap_cfg_reg(P19_1710_MMC_CMDDIR);
79 			omap_cfg_reg(P20_1710_MMC_DATDIR0);
80 		}
81 		if (mmc_controller->slots[0].wires == 4) {
82 			omap_cfg_reg(MMC_DAT1);
83 			/* NOTE: DAT2 can be on W10 (here) or M15 */
84 			if (!mmc_controller->slots[0].nomux)
85 				omap_cfg_reg(MMC_DAT2);
86 			omap_cfg_reg(MMC_DAT3);
87 		}
88 	}
89 
90 	/* Block 2 is on newer chips, and has many pinout options */
91 	if (cpu_is_omap16xx() && controller_nr == 1) {
92 		if (!mmc_controller->slots[1].nomux) {
93 			omap_cfg_reg(Y8_1610_MMC2_CMD);
94 			omap_cfg_reg(Y10_1610_MMC2_CLK);
95 			omap_cfg_reg(R18_1610_MMC2_CLKIN);
96 			omap_cfg_reg(W8_1610_MMC2_DAT0);
97 			if (mmc_controller->slots[1].wires == 4) {
98 				omap_cfg_reg(V8_1610_MMC2_DAT1);
99 				omap_cfg_reg(W15_1610_MMC2_DAT2);
100 				omap_cfg_reg(R10_1610_MMC2_DAT3);
101 			}
102 
103 			/* These are needed for the level shifter */
104 			omap_cfg_reg(V9_1610_MMC2_CMDDIR);
105 			omap_cfg_reg(V5_1610_MMC2_DATDIR0);
106 			omap_cfg_reg(W19_1610_MMC2_DATDIR1);
107 		}
108 
109 		/* Feedback clock must be set on OMAP-1710 MMC2 */
110 		if (cpu_is_omap1710())
111 			omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
112 					MOD_CONF_CTRL_1);
113 	}
114 }
115 
116 #define OMAP_MMC_NR_RES		4
117 
118 /*
119  * Register MMC devices.
120  */
omap_mmc_add(const char * name,int id,unsigned long base,unsigned long size,unsigned int irq,unsigned rx_req,unsigned tx_req,struct omap_mmc_platform_data * data)121 static int __init omap_mmc_add(const char *name, int id, unsigned long base,
122 				unsigned long size, unsigned int irq,
123 				unsigned rx_req, unsigned tx_req,
124 				struct omap_mmc_platform_data *data)
125 {
126 	struct platform_device *pdev;
127 	struct resource res[OMAP_MMC_NR_RES];
128 	int ret;
129 
130 	pdev = platform_device_alloc(name, id);
131 	if (!pdev)
132 		return -ENOMEM;
133 
134 	memset(res, 0, OMAP_MMC_NR_RES * sizeof(struct resource));
135 	res[0].start = base;
136 	res[0].end = base + size - 1;
137 	res[0].flags = IORESOURCE_MEM;
138 	res[1].start = res[1].end = irq;
139 	res[1].flags = IORESOURCE_IRQ;
140 	res[2].start = rx_req;
141 	res[2].name = "rx";
142 	res[2].flags = IORESOURCE_DMA;
143 	res[3].start = tx_req;
144 	res[3].name = "tx";
145 	res[3].flags = IORESOURCE_DMA;
146 
147 	if (cpu_is_omap15xx())
148 		data->slots[0].features = MMC_OMAP15XX;
149 	if (cpu_is_omap16xx())
150 		data->slots[0].features = MMC_OMAP16XX;
151 
152 	ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
153 	if (ret == 0)
154 		ret = platform_device_add_data(pdev, data, sizeof(*data));
155 	if (ret)
156 		goto fail;
157 
158 	ret = platform_device_add(pdev);
159 	if (ret)
160 		goto fail;
161 
162 	/* return device handle to board setup code */
163 	data->dev = &pdev->dev;
164 	return 0;
165 
166 fail:
167 	platform_device_put(pdev);
168 	return ret;
169 }
170 
omap1_init_mmc(struct omap_mmc_platform_data ** mmc_data,int nr_controllers)171 void __init omap1_init_mmc(struct omap_mmc_platform_data **mmc_data,
172 			int nr_controllers)
173 {
174 	int i;
175 
176 	for (i = 0; i < nr_controllers; i++) {
177 		unsigned long base, size;
178 		unsigned rx_req, tx_req;
179 		unsigned int irq = 0;
180 
181 		if (!mmc_data[i])
182 			continue;
183 
184 		omap1_mmc_mux(mmc_data[i], i);
185 
186 		switch (i) {
187 		case 0:
188 			base = OMAP1_MMC1_BASE;
189 			irq = INT_MMC;
190 			rx_req = 22;
191 			tx_req = 21;
192 			break;
193 		case 1:
194 			if (!cpu_is_omap16xx())
195 				return;
196 			base = OMAP1_MMC2_BASE;
197 			irq = INT_1610_MMC2;
198 			rx_req = 55;
199 			tx_req = 54;
200 			break;
201 		default:
202 			continue;
203 		}
204 		size = OMAP1_MMC_SIZE;
205 
206 		omap_mmc_add("mmci-omap", i, base, size, irq,
207 				rx_req, tx_req, mmc_data[i]);
208 	}
209 }
210 
211 #endif
212 
213 /*-------------------------------------------------------------------------*/
214 
215 /* Numbering for the SPI-capable controllers when used for SPI:
216  * spi		= 1
217  * uwire	= 2
218  * mmc1..2	= 3..4
219  * mcbsp1..3	= 5..7
220  */
221 
222 #if IS_ENABLED(CONFIG_SPI_OMAP_UWIRE)
223 
224 #define	OMAP_UWIRE_BASE		0xfffb3000
225 
226 static struct resource uwire_resources[] = {
227 	{
228 		.start		= OMAP_UWIRE_BASE,
229 		.end		= OMAP_UWIRE_BASE + 0x20,
230 		.flags		= IORESOURCE_MEM,
231 	},
232 };
233 
234 static struct platform_device omap_uwire_device = {
235 	.name	   = "omap_uwire",
236 	.id	     = -1,
237 	.num_resources	= ARRAY_SIZE(uwire_resources),
238 	.resource	= uwire_resources,
239 };
240 
omap_init_uwire(void)241 static void omap_init_uwire(void)
242 {
243 	/* FIXME define and use a boot tag; not all boards will be hooking
244 	 * up devices to the microwire controller, and multi-board configs
245 	 * mean that CONFIG_SPI_OMAP_UWIRE may be configured anyway...
246 	 */
247 
248 	/* board-specific code must configure chipselects (only a few
249 	 * are normally used) and SCLK/SDI/SDO (each has two choices).
250 	 */
251 	(void) platform_device_register(&omap_uwire_device);
252 }
253 #else
omap_init_uwire(void)254 static inline void omap_init_uwire(void) {}
255 #endif
256 
257 
258 #define OMAP1_RNG_BASE		0xfffe5000
259 
260 static struct resource omap1_rng_resources[] = {
261 	{
262 		.start		= OMAP1_RNG_BASE,
263 		.end		= OMAP1_RNG_BASE + 0x4f,
264 		.flags		= IORESOURCE_MEM,
265 	},
266 };
267 
268 static struct platform_device omap1_rng_device = {
269 	.name		= "omap_rng",
270 	.id		= -1,
271 	.num_resources	= ARRAY_SIZE(omap1_rng_resources),
272 	.resource	= omap1_rng_resources,
273 };
274 
omap1_init_rng(void)275 static void omap1_init_rng(void)
276 {
277 	if (!cpu_is_omap16xx())
278 		return;
279 
280 	(void) platform_device_register(&omap1_rng_device);
281 }
282 
283 /*-------------------------------------------------------------------------*/
284 
285 /*
286  * This gets called after board-specific INIT_MACHINE, and initializes most
287  * on-chip peripherals accessible on this board (except for few like USB):
288  *
289  *  (a) Does any "standard config" pin muxing needed.  Board-specific
290  *	code will have muxed GPIO pins and done "nonstandard" setup;
291  *	that code could live in the boot loader.
292  *  (b) Populating board-specific platform_data with the data drivers
293  *	rely on to handle wiring variations.
294  *  (c) Creating platform devices as meaningful on this board and
295  *	with this kernel configuration.
296  *
297  * Claiming GPIOs, and setting their direction and initial values, is the
298  * responsibility of the device drivers.  So is responding to probe().
299  *
300  * Board-specific knowledge like creating devices or pin setup is to be
301  * kept out of drivers as much as possible.  In particular, pin setup
302  * may be handled by the boot loader, and drivers should expect it will
303  * normally have been done by the time they're probed.
304  */
omap1_init_devices(void)305 static int __init omap1_init_devices(void)
306 {
307 	if (!cpu_class_is_omap1())
308 		return -ENODEV;
309 
310 	omap1_sram_init();
311 	omap1_clk_late_init();
312 
313 	/* please keep these calls, and their implementations above,
314 	 * in alphabetical order so they're easier to sort through.
315 	 */
316 
317 	omap_init_rtc();
318 	omap_init_uwire();
319 	omap1_init_rng();
320 
321 	return 0;
322 }
323 arch_initcall(omap1_init_devices);
324 
325 #if IS_ENABLED(CONFIG_OMAP_WATCHDOG)
326 
327 static struct resource wdt_resources[] = {
328 	{
329 		.start		= 0xfffeb000,
330 		.end		= 0xfffeb07F,
331 		.flags		= IORESOURCE_MEM,
332 	},
333 };
334 
335 static struct platform_device omap_wdt_device = {
336 	.name		= "omap_wdt",
337 	.id		= -1,
338 	.num_resources	= ARRAY_SIZE(wdt_resources),
339 	.resource	= wdt_resources,
340 };
341 
omap_init_wdt(void)342 static int __init omap_init_wdt(void)
343 {
344 	struct omap_wd_timer_platform_data pdata;
345 	int ret;
346 
347 	if (!cpu_is_omap16xx())
348 		return -ENODEV;
349 
350 	pdata.read_reset_sources = omap1_get_reset_sources;
351 
352 	ret = platform_device_register(&omap_wdt_device);
353 	if (!ret) {
354 		ret = platform_device_add_data(&omap_wdt_device, &pdata,
355 					       sizeof(pdata));
356 		if (ret)
357 			platform_device_del(&omap_wdt_device);
358 	}
359 
360 	return ret;
361 }
362 subsys_initcall(omap_init_wdt);
363 #endif
364