xref: /openbmc/linux/arch/arm/mach-ux500/cpu-db8500.c (revision df790f58)
1 /*
2  * Copyright (C) 2008-2009 ST-Ericsson SA
3  *
4  * Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
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  */
11 #include <linux/types.h>
12 #include <linux/init.h>
13 #include <linux/device.h>
14 #include <linux/amba/bus.h>
15 #include <linux/interrupt.h>
16 #include <linux/irq.h>
17 #include <linux/platform_device.h>
18 #include <linux/io.h>
19 #include <linux/mfd/abx500/ab8500.h>
20 #include <linux/mfd/dbx500-prcmu.h>
21 #include <linux/of.h>
22 #include <linux/of_platform.h>
23 #include <linux/regulator/machine.h>
24 #include <linux/platform_data/pinctrl-nomadik.h>
25 #include <linux/random.h>
26 
27 #include <asm/pmu.h>
28 #include <asm/mach/map.h>
29 #include <asm/mach/arch.h>
30 
31 #include "setup.h"
32 #include "devices.h"
33 #include "irqs.h"
34 
35 #include "devices-db8500.h"
36 #include "ste-dma40-db8500.h"
37 #include "db8500-regs.h"
38 #include "board-mop500.h"
39 #include "id.h"
40 
41 /* minimum static i/o mapping required to boot U8500 platforms */
42 static struct map_desc u8500_uart_io_desc[] __initdata = {
43 	__IO_DEV_DESC(U8500_UART0_BASE, SZ_4K),
44 	__IO_DEV_DESC(U8500_UART2_BASE, SZ_4K),
45 };
46 /*  U8500 and U9540 common io_desc */
47 static struct map_desc u8500_common_io_desc[] __initdata = {
48 	/* SCU base also covers GIC CPU BASE and TWD with its 4K page */
49 	__IO_DEV_DESC(U8500_SCU_BASE, SZ_4K),
50 	__IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K),
51 	__IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K),
52 	__IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K),
53 	__IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K),
54 
55 	__IO_DEV_DESC(U8500_CLKRST1_BASE, SZ_4K),
56 	__IO_DEV_DESC(U8500_CLKRST2_BASE, SZ_4K),
57 	__IO_DEV_DESC(U8500_CLKRST3_BASE, SZ_4K),
58 	__IO_DEV_DESC(U8500_CLKRST5_BASE, SZ_4K),
59 	__IO_DEV_DESC(U8500_CLKRST6_BASE, SZ_4K),
60 
61 	__IO_DEV_DESC(U8500_GPIO0_BASE, SZ_4K),
62 	__IO_DEV_DESC(U8500_GPIO1_BASE, SZ_4K),
63 	__IO_DEV_DESC(U8500_GPIO2_BASE, SZ_4K),
64 	__IO_DEV_DESC(U8500_GPIO3_BASE, SZ_4K),
65 };
66 
67 /* U8500 IO map specific description */
68 static struct map_desc u8500_io_desc[] __initdata = {
69 	__IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K),
70 	__IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K),
71 
72 };
73 
74 /* U9540 IO map specific description */
75 static struct map_desc u9540_io_desc[] __initdata = {
76 	__IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K + SZ_8K),
77 	__IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K + SZ_8K),
78 };
79 
80 void __init u8500_map_io(void)
81 {
82 	/*
83 	 * Map the UARTs early so that the DEBUG_LL stuff continues to work.
84 	 */
85 	iotable_init(u8500_uart_io_desc, ARRAY_SIZE(u8500_uart_io_desc));
86 
87 	ux500_map_io();
88 
89 	iotable_init(u8500_common_io_desc, ARRAY_SIZE(u8500_common_io_desc));
90 
91 	if (cpu_is_ux540_family())
92 		iotable_init(u9540_io_desc, ARRAY_SIZE(u9540_io_desc));
93 	else
94 		iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc));
95 }
96 
97 static struct resource db8500_pmu_resources[] = {
98 	[0] = {
99 		.start		= IRQ_DB8500_PMU,
100 		.end		= IRQ_DB8500_PMU,
101 		.flags		= IORESOURCE_IRQ,
102 	},
103 };
104 
105 /*
106  * The PMU IRQ lines of two cores are wired together into a single interrupt.
107  * Bounce the interrupt to the other core if it's not ours.
108  */
109 static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler)
110 {
111 	irqreturn_t ret = handler(irq, dev);
112 	int other = !smp_processor_id();
113 
114 	if (ret == IRQ_NONE && cpu_online(other))
115 		irq_set_affinity(irq, cpumask_of(other));
116 
117 	/*
118 	 * We should be able to get away with the amount of IRQ_NONEs we give,
119 	 * while still having the spurious IRQ detection code kick in if the
120 	 * interrupt really starts hitting spuriously.
121 	 */
122 	return ret;
123 }
124 
125 struct arm_pmu_platdata db8500_pmu_platdata = {
126 	.handle_irq		= db8500_pmu_handler,
127 };
128 
129 static struct platform_device db8500_pmu_device = {
130 	.name			= "arm-pmu",
131 	.id			= -1,
132 	.num_resources		= ARRAY_SIZE(db8500_pmu_resources),
133 	.resource		= db8500_pmu_resources,
134 	.dev.platform_data	= &db8500_pmu_platdata,
135 };
136 
137 static struct platform_device *platform_devs[] __initdata = {
138 	&u8500_dma40_device,
139 	&db8500_pmu_device,
140 };
141 
142 static resource_size_t __initdata db8500_gpio_base[] = {
143 	U8500_GPIOBANK0_BASE,
144 	U8500_GPIOBANK1_BASE,
145 	U8500_GPIOBANK2_BASE,
146 	U8500_GPIOBANK3_BASE,
147 	U8500_GPIOBANK4_BASE,
148 	U8500_GPIOBANK5_BASE,
149 	U8500_GPIOBANK6_BASE,
150 	U8500_GPIOBANK7_BASE,
151 	U8500_GPIOBANK8_BASE,
152 };
153 
154 static void __init db8500_add_gpios(struct device *parent)
155 {
156 	struct nmk_gpio_platform_data pdata = {
157 		.supports_sleepmode = true,
158 	};
159 
160 	dbx500_add_gpios(parent, ARRAY_AND_SIZE(db8500_gpio_base),
161 			 IRQ_DB8500_GPIO0, &pdata);
162 	dbx500_add_pinctrl(parent, "pinctrl-db8500", U8500_PRCMU_BASE);
163 }
164 
165 static int usb_db8500_rx_dma_cfg[] = {
166 	DB8500_DMA_DEV38_USB_OTG_IEP_1_9,
167 	DB8500_DMA_DEV37_USB_OTG_IEP_2_10,
168 	DB8500_DMA_DEV36_USB_OTG_IEP_3_11,
169 	DB8500_DMA_DEV19_USB_OTG_IEP_4_12,
170 	DB8500_DMA_DEV18_USB_OTG_IEP_5_13,
171 	DB8500_DMA_DEV17_USB_OTG_IEP_6_14,
172 	DB8500_DMA_DEV16_USB_OTG_IEP_7_15,
173 	DB8500_DMA_DEV39_USB_OTG_IEP_8
174 };
175 
176 static int usb_db8500_tx_dma_cfg[] = {
177 	DB8500_DMA_DEV38_USB_OTG_OEP_1_9,
178 	DB8500_DMA_DEV37_USB_OTG_OEP_2_10,
179 	DB8500_DMA_DEV36_USB_OTG_OEP_3_11,
180 	DB8500_DMA_DEV19_USB_OTG_OEP_4_12,
181 	DB8500_DMA_DEV18_USB_OTG_OEP_5_13,
182 	DB8500_DMA_DEV17_USB_OTG_OEP_6_14,
183 	DB8500_DMA_DEV16_USB_OTG_OEP_7_15,
184 	DB8500_DMA_DEV39_USB_OTG_OEP_8
185 };
186 
187 static const char *db8500_read_soc_id(void)
188 {
189 	void __iomem *uid = __io_address(U8500_BB_UID_BASE);
190 
191 	/* Throw these device-specific numbers into the entropy pool */
192 	add_device_randomness(uid, 0x14);
193 	return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
194 			 readl((u32 *)uid+0),
195 			 readl((u32 *)uid+1), readl((u32 *)uid+2),
196 			 readl((u32 *)uid+3), readl((u32 *)uid+4));
197 }
198 
199 static struct device * __init db8500_soc_device_init(void)
200 {
201 	const char *soc_id = db8500_read_soc_id();
202 
203 	return ux500_soc_device_init(soc_id);
204 }
205 
206 /*
207  * This function is called from the board init
208  */
209 struct device * __init u8500_init_devices(void)
210 {
211 	struct device *parent;
212 	int i;
213 
214 	parent = db8500_soc_device_init();
215 
216 	db8500_add_rtc(parent);
217 	db8500_add_gpios(parent);
218 	db8500_add_usb(parent, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg);
219 
220 	for (i = 0; i < ARRAY_SIZE(platform_devs); i++)
221 		platform_devs[i]->dev.parent = parent;
222 
223 	platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
224 
225 	return parent;
226 }
227 
228 #ifdef CONFIG_MACH_UX500_DT
229 
230 /* TODO: Once all pieces are DT:ed, remove completely. */
231 static struct device * __init u8500_of_init_devices(void)
232 {
233 	struct device *parent = db8500_soc_device_init();
234 
235 	db8500_add_usb(parent, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg);
236 
237 	u8500_dma40_device.dev.parent = parent;
238 
239 	/*
240 	 * Devices to be DT:ed:
241 	 *   u8500_dma40_device  = todo
242 	 *   db8500_pmu_device   = done
243 	 *   db8500_prcmu_device = done
244 	 */
245 	platform_device_register(&u8500_dma40_device);
246 
247 	return parent;
248 }
249 
250 static struct of_dev_auxdata u8500_auxdata_lookup[] __initdata = {
251 	/* Requires call-back bindings. */
252 	OF_DEV_AUXDATA("arm,cortex-a9-pmu", 0, "arm-pmu", &db8500_pmu_platdata),
253 	/* Requires DMA bindings. */
254 	OF_DEV_AUXDATA("arm,pl011", 0x80120000, "uart0", &uart0_plat),
255 	OF_DEV_AUXDATA("arm,pl011", 0x80121000, "uart1", &uart1_plat),
256 	OF_DEV_AUXDATA("arm,pl011", 0x80007000, "uart2", &uart2_plat),
257 	OF_DEV_AUXDATA("arm,pl022", 0x80002000, "ssp0",  &ssp0_plat),
258 	OF_DEV_AUXDATA("arm,pl18x", 0x80126000, "sdi0",  &mop500_sdi0_data),
259 	OF_DEV_AUXDATA("arm,pl18x", 0x80118000, "sdi1",  &mop500_sdi1_data),
260 	OF_DEV_AUXDATA("arm,pl18x", 0x80005000, "sdi2",  &mop500_sdi2_data),
261 	OF_DEV_AUXDATA("arm,pl18x", 0x80114000, "sdi4",  &mop500_sdi4_data),
262 	/* Requires clock name bindings. */
263 	OF_DEV_AUXDATA("st,nomadik-gpio", 0x8012e000, "gpio.0", NULL),
264 	OF_DEV_AUXDATA("st,nomadik-gpio", 0x8012e080, "gpio.1", NULL),
265 	OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e000, "gpio.2", NULL),
266 	OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e080, "gpio.3", NULL),
267 	OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e100, "gpio.4", NULL),
268 	OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e180, "gpio.5", NULL),
269 	OF_DEV_AUXDATA("st,nomadik-gpio", 0x8011e000, "gpio.6", NULL),
270 	OF_DEV_AUXDATA("st,nomadik-gpio", 0x8011e080, "gpio.7", NULL),
271 	OF_DEV_AUXDATA("st,nomadik-gpio", 0xa03fe000, "gpio.8", NULL),
272 	OF_DEV_AUXDATA("st,nomadik-i2c", 0x80004000, "nmk-i2c.0", NULL),
273 	OF_DEV_AUXDATA("st,nomadik-i2c", 0x80122000, "nmk-i2c.1", NULL),
274 	OF_DEV_AUXDATA("st,nomadik-i2c", 0x80128000, "nmk-i2c.2", NULL),
275 	OF_DEV_AUXDATA("st,nomadik-i2c", 0x80110000, "nmk-i2c.3", NULL),
276 	OF_DEV_AUXDATA("st,nomadik-i2c", 0x8012a000, "nmk-i2c.4", NULL),
277 	OF_DEV_AUXDATA("stericsson,db8500-musb", 0xa03e0000, "musb-ux500.0", NULL),
278 	OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
279 			&db8500_prcmu_pdata),
280 	OF_DEV_AUXDATA("smsc,lan9115", 0x50000000, "smsc911x.0", NULL),
281 	OF_DEV_AUXDATA("stericsson,ux500-cryp", 0xa03cb000, "cryp1", NULL),
282 	OF_DEV_AUXDATA("stericsson,ux500-hash", 0xa03c2000, "hash1", NULL),
283 	/* Requires device name bindings. */
284 	OF_DEV_AUXDATA("stericsson,db8500-pinctrl", U8500_PRCMU_BASE,
285 		"pinctrl-db8500", NULL),
286 	/* Requires clock name and DMA bindings. */
287 	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80123000,
288 		"ux500-msp-i2s.0", &msp0_platform_data),
289 	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80124000,
290 		"ux500-msp-i2s.1", &msp1_platform_data),
291 	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80117000,
292 		"ux500-msp-i2s.2", &msp2_platform_data),
293 	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80125000,
294 		"ux500-msp-i2s.3", &msp3_platform_data),
295 	{},
296 };
297 
298 static struct of_dev_auxdata u8540_auxdata_lookup[] __initdata = {
299 	/* Requires DMA bindings. */
300 	OF_DEV_AUXDATA("arm,pl011", 0x80120000, "uart0", NULL),
301 	OF_DEV_AUXDATA("arm,pl011", 0x80121000, "uart1", NULL),
302 	OF_DEV_AUXDATA("arm,pl011", 0x80007000, "uart2", NULL),
303 	OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
304 			&db8500_prcmu_pdata),
305 	{},
306 };
307 
308 static const struct of_device_id u8500_local_bus_nodes[] = {
309 	/* only create devices below soc node */
310 	{ .compatible = "stericsson,db8500", },
311 	{ .compatible = "stericsson,db8500-prcmu", },
312 	{ .compatible = "simple-bus"},
313 	{ },
314 };
315 
316 static void __init u8500_init_machine(void)
317 {
318 	struct device *parent = NULL;
319 
320 	/* Pinmaps must be in place before devices register */
321 	if (of_machine_is_compatible("st-ericsson,mop500"))
322 		mop500_pinmaps_init();
323 	else if (of_machine_is_compatible("calaosystems,snowball-a9500")) {
324 		snowball_pinmaps_init();
325 		mop500_snowball_ethernet_clock_enable();
326 	} else if (of_machine_is_compatible("st-ericsson,hrefv60+"))
327 		hrefv60_pinmaps_init();
328 	else if (of_machine_is_compatible("st-ericsson,ccu9540")) {}
329 		/* TODO: Add pinmaps for ccu9540 board. */
330 
331 	/* TODO: Export SoC, USB, cpu-freq and DMA40 */
332 	parent = u8500_of_init_devices();
333 
334 	/* automatically probe child nodes of dbx5x0 devices */
335 	if (of_machine_is_compatible("st-ericsson,u8540"))
336 		of_platform_populate(NULL, u8500_local_bus_nodes,
337 				     u8540_auxdata_lookup, parent);
338 	else
339 		of_platform_populate(NULL, u8500_local_bus_nodes,
340 				     u8500_auxdata_lookup, parent);
341 }
342 
343 static const char * stericsson_dt_platform_compat[] = {
344 	"st-ericsson,u8500",
345 	"st-ericsson,u8540",
346 	"st-ericsson,u9500",
347 	"st-ericsson,u9540",
348 	NULL,
349 };
350 
351 DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)")
352 	.smp            = smp_ops(ux500_smp_ops),
353 	.map_io		= u8500_map_io,
354 	.init_irq	= ux500_init_irq,
355 	/* we re-use nomadik timer here */
356 	.init_time	= ux500_timer_init,
357 	.init_machine	= u8500_init_machine,
358 	.init_late	= NULL,
359 	.dt_compat      = stericsson_dt_platform_compat,
360 MACHINE_END
361 
362 #endif
363