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ARM: 7409/1: Do not call flush_cache_user_range with mmap_sem held
[linux/fpc-iii.git] / arch / arm / mach-vexpress / v2m.c
blob9e6b93b1a04342e7883aa241ddecb02856818a0e
1 /*
2 * Versatile Express V2M Motherboard Support
3 */
4 #include <linux/device.h>
5 #include <linux/amba/bus.h>
6 #include <linux/amba/mmci.h>
7 #include <linux/io.h>
8 #include <linux/init.h>
9 #include <linux/platform_device.h>
10 #include <linux/ata_platform.h>
11 #include <linux/smsc911x.h>
12 #include <linux/spinlock.h>
13 #include <linux/sysdev.h>
14 #include <linux/usb/isp1760.h>
15 #include <linux/clkdev.h>
16 #include <linux/mtd/physmap.h>
17
18 #include <asm/mach-types.h>
19 #include <asm/sizes.h>
20 #include <asm/mach/arch.h>
21 #include <asm/mach/map.h>
22 #include <asm/mach/time.h>
23 #include <asm/hardware/arm_timer.h>
24 #include <asm/hardware/timer-sp.h>
25 #include <asm/hardware/sp810.h>
26
27 #include <mach/ct-ca9x4.h>
28 #include <mach/motherboard.h>
29
30 #include <plat/sched_clock.h>
31
32 #include "core.h"
33
34 #define V2M_PA_CS0 0x40000000
35 #define V2M_PA_CS1 0x44000000
36 #define V2M_PA_CS2 0x48000000
37 #define V2M_PA_CS3 0x4c000000
38 #define V2M_PA_CS7 0x10000000
39
40 static struct map_desc v2m_io_desc[] __initdata = {
41 {
42 .virtual = __MMIO_P2V(V2M_PA_CS7),
43 .pfn = __phys_to_pfn(V2M_PA_CS7),
44 .length = SZ_128K,
45 .type = MT_DEVICE,
46 },
47 };
48
49 static void __init v2m_timer_init(void)
50 {
51 u32 scctrl;
52
53 /* Select 1MHz TIMCLK as the reference clock for SP804 timers */
54 scctrl = readl(MMIO_P2V(V2M_SYSCTL + SCCTRL));
55 scctrl |= SCCTRL_TIMEREN0SEL_TIMCLK;
56 scctrl |= SCCTRL_TIMEREN1SEL_TIMCLK;
57 writel(scctrl, MMIO_P2V(V2M_SYSCTL + SCCTRL));
58
59 writel(0, MMIO_P2V(V2M_TIMER0) + TIMER_CTRL);
60 writel(0, MMIO_P2V(V2M_TIMER1) + TIMER_CTRL);
61
62 sp804_clocksource_init(MMIO_P2V(V2M_TIMER1), "v2m-timer1");
63 sp804_clockevents_init(MMIO_P2V(V2M_TIMER0), IRQ_V2M_TIMER0,
64 "v2m-timer0");
65 }
66
67 static struct sys_timer v2m_timer = {
68 .init = v2m_timer_init,
69 };
70
71
72 static DEFINE_SPINLOCK(v2m_cfg_lock);
73
74 int v2m_cfg_write(u32 devfn, u32 data)
75 {
76 /* Configuration interface broken? */
77 u32 val;
78
79 printk("%s: writing %08x to %08x\n", __func__, data, devfn);
80
81 devfn |= SYS_CFG_START | SYS_CFG_WRITE;
82
83 spin_lock(&v2m_cfg_lock);
84 val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
85 writel(val & ~SYS_CFG_COMPLETE, MMIO_P2V(V2M_SYS_CFGSTAT));
86
87 writel(data, MMIO_P2V(V2M_SYS_CFGDATA));
88 writel(devfn, MMIO_P2V(V2M_SYS_CFGCTRL));
89
90 do {
91 val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
92 } while (val == 0);
93 spin_unlock(&v2m_cfg_lock);
94
95 return !!(val & SYS_CFG_ERR);
96 }
97
98 int v2m_cfg_read(u32 devfn, u32 *data)
99 {
100 u32 val;
101
102 devfn |= SYS_CFG_START;
103
104 spin_lock(&v2m_cfg_lock);
105 writel(0, MMIO_P2V(V2M_SYS_CFGSTAT));
106 writel(devfn, MMIO_P2V(V2M_SYS_CFGCTRL));
107
108 mb();
109
110 do {
111 cpu_relax();
112 val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
113 } while (val == 0);
114
115 *data = readl(MMIO_P2V(V2M_SYS_CFGDATA));
116 spin_unlock(&v2m_cfg_lock);
117
118 return !!(val & SYS_CFG_ERR);
119 }
120
121
122 static struct resource v2m_pcie_i2c_resource = {
123 .start = V2M_SERIAL_BUS_PCI,
124 .end = V2M_SERIAL_BUS_PCI + SZ_4K - 1,
125 .flags = IORESOURCE_MEM,
126 };
127
128 static struct platform_device v2m_pcie_i2c_device = {
129 .name = "versatile-i2c",
130 .id = 0,
131 .num_resources = 1,
132 .resource = &v2m_pcie_i2c_resource,
133 };
134
135 static struct resource v2m_ddc_i2c_resource = {
136 .start = V2M_SERIAL_BUS_DVI,
137 .end = V2M_SERIAL_BUS_DVI + SZ_4K - 1,
138 .flags = IORESOURCE_MEM,
139 };
140
141 static struct platform_device v2m_ddc_i2c_device = {
142 .name = "versatile-i2c",
143 .id = 1,
144 .num_resources = 1,
145 .resource = &v2m_ddc_i2c_resource,
146 };
147
148 static struct resource v2m_eth_resources[] = {
149 {
150 .start = V2M_LAN9118,
151 .end = V2M_LAN9118 + SZ_64K - 1,
152 .flags = IORESOURCE_MEM,
153 }, {
154 .start = IRQ_V2M_LAN9118,
155 .end = IRQ_V2M_LAN9118,
156 .flags = IORESOURCE_IRQ,
157 },
158 };
159
160 static struct smsc911x_platform_config v2m_eth_config = {
161 .flags = SMSC911X_USE_32BIT,
162 .irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH,
163 .irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL,
164 .phy_interface = PHY_INTERFACE_MODE_MII,
165 };
166
167 static struct platform_device v2m_eth_device = {
168 .name = "smsc911x",
169 .id = -1,
170 .resource = v2m_eth_resources,
171 .num_resources = ARRAY_SIZE(v2m_eth_resources),
172 .dev.platform_data = &v2m_eth_config,
173 };
174
175 static struct resource v2m_usb_resources[] = {
176 {
177 .start = V2M_ISP1761,
178 .end = V2M_ISP1761 + SZ_128K - 1,
179 .flags = IORESOURCE_MEM,
180 }, {
181 .start = IRQ_V2M_ISP1761,
182 .end = IRQ_V2M_ISP1761,
183 .flags = IORESOURCE_IRQ,
184 },
185 };
186
187 static struct isp1760_platform_data v2m_usb_config = {
188 .is_isp1761 = true,
189 .bus_width_16 = false,
190 .port1_otg = true,
191 .analog_oc = false,
192 .dack_polarity_high = false,
193 .dreq_polarity_high = false,
194 };
195
196 static struct platform_device v2m_usb_device = {
197 .name = "isp1760",
198 .id = -1,
199 .resource = v2m_usb_resources,
200 .num_resources = ARRAY_SIZE(v2m_usb_resources),
201 .dev.platform_data = &v2m_usb_config,
202 };
203
204 static void v2m_flash_set_vpp(struct platform_device *pdev, int on)
205 {
206 writel(on != 0, MMIO_P2V(V2M_SYS_FLASH));
207 }
208
209 static struct physmap_flash_data v2m_flash_data = {
210 .width = 4,
211 .set_vpp = v2m_flash_set_vpp,
212 };
213
214 static struct resource v2m_flash_resources[] = {
215 {
216 .start = V2M_NOR0,
217 .end = V2M_NOR0 + SZ_64M - 1,
218 .flags = IORESOURCE_MEM,
219 }, {
220 .start = V2M_NOR1,
221 .end = V2M_NOR1 + SZ_64M - 1,
222 .flags = IORESOURCE_MEM,
223 },
224 };
225
226 static struct platform_device v2m_flash_device = {
227 .name = "physmap-flash",
228 .id = -1,
229 .resource = v2m_flash_resources,
230 .num_resources = ARRAY_SIZE(v2m_flash_resources),
231 .dev.platform_data = &v2m_flash_data,
232 };
233
234 static struct pata_platform_info v2m_pata_data = {
235 .ioport_shift = 2,
236 };
237
238 static struct resource v2m_pata_resources[] = {
239 {
240 .start = V2M_CF,
241 .end = V2M_CF + 0xff,
242 .flags = IORESOURCE_MEM,
243 }, {
244 .start = V2M_CF + 0x100,
245 .end = V2M_CF + SZ_4K - 1,
246 .flags = IORESOURCE_MEM,
247 },
248 };
249
250 static struct platform_device v2m_cf_device = {
251 .name = "pata_platform",
252 .id = -1,
253 .resource = v2m_pata_resources,
254 .num_resources = ARRAY_SIZE(v2m_pata_resources),
255 .dev.platform_data = &v2m_pata_data,
256 };
257
258 static unsigned int v2m_mmci_status(struct device *dev)
259 {
260 return readl(MMIO_P2V(V2M_SYS_MCI)) & (1 << 0);
261 }
262
263 static struct mmci_platform_data v2m_mmci_data = {
264 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
265 .status = v2m_mmci_status,
266 };
267
268 static AMBA_DEVICE(aaci, "mb:aaci", V2M_AACI, NULL);
269 static AMBA_DEVICE(mmci, "mb:mmci", V2M_MMCI, &v2m_mmci_data);
270 static AMBA_DEVICE(kmi0, "mb:kmi0", V2M_KMI0, NULL);
271 static AMBA_DEVICE(kmi1, "mb:kmi1", V2M_KMI1, NULL);
272 static AMBA_DEVICE(uart0, "mb:uart0", V2M_UART0, NULL);
273 static AMBA_DEVICE(uart1, "mb:uart1", V2M_UART1, NULL);
274 static AMBA_DEVICE(uart2, "mb:uart2", V2M_UART2, NULL);
275 static AMBA_DEVICE(uart3, "mb:uart3", V2M_UART3, NULL);
276 static AMBA_DEVICE(wdt, "mb:wdt", V2M_WDT, NULL);
277 static AMBA_DEVICE(rtc, "mb:rtc", V2M_RTC, NULL);
278
279 static struct amba_device *v2m_amba_devs[] __initdata = {
280 &aaci_device,
281 &mmci_device,
282 &kmi0_device,
283 &kmi1_device,
284 &uart0_device,
285 &uart1_device,
286 &uart2_device,
287 &uart3_device,
288 &wdt_device,
289 &rtc_device,
290 };
291
292
293 static long v2m_osc_round(struct clk *clk, unsigned long rate)
294 {
295 return rate;
296 }
297
298 static int v2m_osc1_set(struct clk *clk, unsigned long rate)
299 {
300 return v2m_cfg_write(SYS_CFG_OSC | SYS_CFG_SITE_MB | 1, rate);
301 }
302
303 static const struct clk_ops osc1_clk_ops = {
304 .round = v2m_osc_round,
305 .set = v2m_osc1_set,
306 };
307
308 static struct clk osc1_clk = {
309 .ops = &osc1_clk_ops,
310 .rate = 24000000,
311 };
312
313 static struct clk osc2_clk = {
314 .rate = 24000000,
315 };
316
317 static struct clk v2m_sp804_clk = {
318 .rate = 1000000,
319 };
320
321 static struct clk dummy_apb_pclk;
322
323 static struct clk_lookup v2m_lookups[] = {
324 { /* AMBA bus clock */
325 .con_id = "apb_pclk",
326 .clk = &dummy_apb_pclk,
327 }, { /* UART0 */
328 .dev_id = "mb:uart0",
329 .clk = &osc2_clk,
330 }, { /* UART1 */
331 .dev_id = "mb:uart1",
332 .clk = &osc2_clk,
333 }, { /* UART2 */
334 .dev_id = "mb:uart2",
335 .clk = &osc2_clk,
336 }, { /* UART3 */
337 .dev_id = "mb:uart3",
338 .clk = &osc2_clk,
339 }, { /* KMI0 */
340 .dev_id = "mb:kmi0",
341 .clk = &osc2_clk,
342 }, { /* KMI1 */
343 .dev_id = "mb:kmi1",
344 .clk = &osc2_clk,
345 }, { /* MMC0 */
346 .dev_id = "mb:mmci",
347 .clk = &osc2_clk,
348 }, { /* CLCD */
349 .dev_id = "mb:clcd",
350 .clk = &osc1_clk,
351 }, { /* SP804 timers */
352 .dev_id = "sp804",
353 .con_id = "v2m-timer0",
354 .clk = &v2m_sp804_clk,
355 }, { /* SP804 timers */
356 .dev_id = "sp804",
357 .con_id = "v2m-timer1",
358 .clk = &v2m_sp804_clk,
359 },
360 };
361
362 static void __init v2m_init_early(void)
363 {
364 ct_desc->init_early();
365 clkdev_add_table(v2m_lookups, ARRAY_SIZE(v2m_lookups));
366 versatile_sched_clock_init(MMIO_P2V(V2M_SYS_24MHZ), 24000000);
367 }
368
369 static void v2m_power_off(void)
370 {
371 if (v2m_cfg_write(SYS_CFG_SHUTDOWN | SYS_CFG_SITE_MB, 0))
372 printk(KERN_EMERG "Unable to shutdown\n");
373 }
374
375 static void v2m_restart(char str, const char *cmd)
376 {
377 if (v2m_cfg_write(SYS_CFG_REBOOT | SYS_CFG_SITE_MB, 0))
378 printk(KERN_EMERG "Unable to reboot\n");
379 }
380
381 struct ct_desc *ct_desc;
382
383 static struct ct_desc *ct_descs[] __initdata = {
384 #ifdef CONFIG_ARCH_VEXPRESS_CA9X4
385 &ct_ca9x4_desc,
386 #endif
387 };
388
389 static void __init v2m_populate_ct_desc(void)
390 {
391 int i;
392 u32 current_tile_id;
393
394 ct_desc = NULL;
395 current_tile_id = readl(MMIO_P2V(V2M_SYS_PROCID0)) & V2M_CT_ID_MASK;
396
397 for (i = 0; i < ARRAY_SIZE(ct_descs) && !ct_desc; ++i)
398 if (ct_descs[i]->id == current_tile_id)
399 ct_desc = ct_descs[i];
400
401 if (!ct_desc)
402 panic("vexpress: failed to populate core tile description "
403 "for tile ID 0x%8x\n", current_tile_id);
404 }
405
406 static void __init v2m_map_io(void)
407 {
408 iotable_init(v2m_io_desc, ARRAY_SIZE(v2m_io_desc));
409 v2m_populate_ct_desc();
410 ct_desc->map_io();
411 }
412
413 static void __init v2m_init_irq(void)
414 {
415 ct_desc->init_irq();
416 }
417
418 static void __init v2m_init(void)
419 {
420 int i;
421
422 platform_device_register(&v2m_pcie_i2c_device);
423 platform_device_register(&v2m_ddc_i2c_device);
424 platform_device_register(&v2m_flash_device);
425 platform_device_register(&v2m_cf_device);
426 platform_device_register(&v2m_eth_device);
427 platform_device_register(&v2m_usb_device);
428
429 for (i = 0; i < ARRAY_SIZE(v2m_amba_devs); i++)
430 amba_device_register(v2m_amba_devs[i], &iomem_resource);
431
432 pm_power_off = v2m_power_off;
433 arm_pm_restart = v2m_restart;
434
435 ct_desc->init_tile();
436 }
437
438 MACHINE_START(VEXPRESS, "ARM-Versatile Express")
439 .boot_params = PLAT_PHYS_OFFSET + 0x00000100,
440 .map_io = v2m_map_io,
441 .init_early = v2m_init_early,
442 .init_irq = v2m_init_irq,
443 .timer = &v2m_timer,
444 .init_machine = v2m_init,
445 MACHINE_END
Linux with added FPC-III support