Merge git://bedivere.hansenpartnership.com/git/scsi-rc-fixes-2.6
[linux-2.6.git] / arch / arm / mach-vexpress / v2m.c
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 v2m_ref_clk = {
322         .rate   = 32768,
323 };
324
325 static struct clk dummy_apb_pclk;
326
327 static struct clk_lookup v2m_lookups[] = {
328         {       /* AMBA bus clock */
329                 .con_id         = "apb_pclk",
330                 .clk            = &dummy_apb_pclk,
331         }, {    /* UART0 */
332                 .dev_id         = "mb:uart0",
333                 .clk            = &osc2_clk,
334         }, {    /* UART1 */
335                 .dev_id         = "mb:uart1",
336                 .clk            = &osc2_clk,
337         }, {    /* UART2 */
338                 .dev_id         = "mb:uart2",
339                 .clk            = &osc2_clk,
340         }, {    /* UART3 */
341                 .dev_id         = "mb:uart3",
342                 .clk            = &osc2_clk,
343         }, {    /* KMI0 */
344                 .dev_id         = "mb:kmi0",
345                 .clk            = &osc2_clk,
346         }, {    /* KMI1 */
347                 .dev_id         = "mb:kmi1",
348                 .clk            = &osc2_clk,
349         }, {    /* MMC0 */
350                 .dev_id         = "mb:mmci",
351                 .clk            = &osc2_clk,
352         }, {    /* CLCD */
353                 .dev_id         = "mb:clcd",
354                 .clk            = &osc1_clk,
355         }, {    /* SP805 WDT */
356                 .dev_id         = "mb:wdt",
357                 .clk            = &v2m_ref_clk,
358         }, {    /* SP804 timers */
359                 .dev_id         = "sp804",
360                 .con_id         = "v2m-timer0",
361                 .clk            = &v2m_sp804_clk,
362         }, {    /* SP804 timers */
363                 .dev_id         = "sp804",
364                 .con_id         = "v2m-timer1",
365                 .clk            = &v2m_sp804_clk,
366         },
367 };
368
369 static void __init v2m_init_early(void)
370 {
371         ct_desc->init_early();
372         clkdev_add_table(v2m_lookups, ARRAY_SIZE(v2m_lookups));
373         versatile_sched_clock_init(MMIO_P2V(V2M_SYS_24MHZ), 24000000);
374 }
375
376 static void v2m_power_off(void)
377 {
378         if (v2m_cfg_write(SYS_CFG_SHUTDOWN | SYS_CFG_SITE_MB, 0))
379                 printk(KERN_EMERG "Unable to shutdown\n");
380 }
381
382 static void v2m_restart(char str, const char *cmd)
383 {
384         if (v2m_cfg_write(SYS_CFG_REBOOT | SYS_CFG_SITE_MB, 0))
385                 printk(KERN_EMERG "Unable to reboot\n");
386 }
387
388 struct ct_desc *ct_desc;
389
390 static struct ct_desc *ct_descs[] __initdata = {
391 #ifdef CONFIG_ARCH_VEXPRESS_CA9X4
392         &ct_ca9x4_desc,
393 #endif
394 };
395
396 static void __init v2m_populate_ct_desc(void)
397 {
398         int i;
399         u32 current_tile_id;
400
401         ct_desc = NULL;
402         current_tile_id = readl(MMIO_P2V(V2M_SYS_PROCID0)) & V2M_CT_ID_MASK;
403
404         for (i = 0; i < ARRAY_SIZE(ct_descs) && !ct_desc; ++i)
405                 if (ct_descs[i]->id == current_tile_id)
406                         ct_desc = ct_descs[i];
407
408         if (!ct_desc)
409                 panic("vexpress: failed to populate core tile description "
410                       "for tile ID 0x%8x\n", current_tile_id);
411 }
412
413 static void __init v2m_map_io(void)
414 {
415         iotable_init(v2m_io_desc, ARRAY_SIZE(v2m_io_desc));
416         v2m_populate_ct_desc();
417         ct_desc->map_io();
418 }
419
420 static void __init v2m_init_irq(void)
421 {
422         ct_desc->init_irq();
423 }
424
425 static void __init v2m_init(void)
426 {
427         int i;
428
429         platform_device_register(&v2m_pcie_i2c_device);
430         platform_device_register(&v2m_ddc_i2c_device);
431         platform_device_register(&v2m_flash_device);
432         platform_device_register(&v2m_cf_device);
433         platform_device_register(&v2m_eth_device);
434         platform_device_register(&v2m_usb_device);
435
436         for (i = 0; i < ARRAY_SIZE(v2m_amba_devs); i++)
437                 amba_device_register(v2m_amba_devs[i], &iomem_resource);
438
439         pm_power_off = v2m_power_off;
440         arm_pm_restart = v2m_restart;
441
442         ct_desc->init_tile();
443 }
444
445 MACHINE_START(VEXPRESS, "ARM-Versatile Express")
446         .boot_params    = PLAT_PHYS_OFFSET + 0x00000100,
447         .map_io         = v2m_map_io,
448         .init_early     = v2m_init_early,
449         .init_irq       = v2m_init_irq,
450         .timer          = &v2m_timer,
451         .init_machine   = v2m_init,
452 MACHINE_END