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authorCatalin Marinas <catalin.marinas@arm.com>2005-10-31 09:25:02 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-10-31 09:25:02 -0500
commit8ad68bbf7a06cdd77c170be792418488dbb65da4 (patch)
tree7caed40139d8e0a490cd7a9de0cf4c78f4285c05 /arch/arm/mach-realview
parente2f2e58e7968f8446b1078a20a18bf8ea12b4fbc (diff)
[ARM] Add support for ARM RealView board
Support for RealView EB. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-realview')
-rw-r--r--arch/arm/mach-realview/Kconfig11
-rw-r--r--arch/arm/mach-realview/Makefile6
-rw-r--r--arch/arm/mach-realview/Makefile.boot4
-rw-r--r--arch/arm/mach-realview/clock.c145
-rw-r--r--arch/arm/mach-realview/clock.h25
-rw-r--r--arch/arm/mach-realview/core.c605
-rw-r--r--arch/arm/mach-realview/core.h118
-rw-r--r--arch/arm/mach-realview/realview_eb.c142
8 files changed, 1056 insertions, 0 deletions
diff --git a/arch/arm/mach-realview/Kconfig b/arch/arm/mach-realview/Kconfig
new file mode 100644
index 000000000000..4b63dc9eabfe
--- /dev/null
+++ b/arch/arm/mach-realview/Kconfig
@@ -0,0 +1,11 @@
1menu "RealView platform type"
2 depends on ARCH_REALVIEW
3
4config MACH_REALVIEW_EB
5 bool "Support RealView/EB platform"
6 default n
7 select ARM_GIC
8 help
9 Include support for the ARM(R) RealView Emulation Baseboard platform.
10
11endmenu
diff --git a/arch/arm/mach-realview/Makefile b/arch/arm/mach-realview/Makefile
new file mode 100644
index 000000000000..8d37ea1605fd
--- /dev/null
+++ b/arch/arm/mach-realview/Makefile
@@ -0,0 +1,6 @@
1#
2# Makefile for the linux kernel.
3#
4
5obj-y := core.o clock.o
6obj-$(CONFIG_MACH_REALVIEW_EB) += realview_eb.o
diff --git a/arch/arm/mach-realview/Makefile.boot b/arch/arm/mach-realview/Makefile.boot
new file mode 100644
index 000000000000..c7e75acfe6c9
--- /dev/null
+++ b/arch/arm/mach-realview/Makefile.boot
@@ -0,0 +1,4 @@
1 zreladdr-y := 0x00008000
2params_phys-y := 0x00000100
3initrd_phys-y := 0x00800000
4
diff --git a/arch/arm/mach-realview/clock.c b/arch/arm/mach-realview/clock.c
new file mode 100644
index 000000000000..002635c97bb6
--- /dev/null
+++ b/arch/arm/mach-realview/clock.c
@@ -0,0 +1,145 @@
1/*
2 * linux/arch/arm/mach-realview/clock.c
3 *
4 * Copyright (C) 2004 ARM Limited.
5 * Written by Deep Blue Solutions Limited.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#include <linux/module.h>
12#include <linux/kernel.h>
13#include <linux/list.h>
14#include <linux/errno.h>
15#include <linux/err.h>
16
17#include <asm/semaphore.h>
18#include <asm/hardware/clock.h>
19#include <asm/hardware/icst307.h>
20
21#include "clock.h"
22
23static LIST_HEAD(clocks);
24static DECLARE_MUTEX(clocks_sem);
25
26struct clk *clk_get(struct device *dev, const char *id)
27{
28 struct clk *p, *clk = ERR_PTR(-ENOENT);
29
30 down(&clocks_sem);
31 list_for_each_entry(p, &clocks, node) {
32 if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
33 clk = p;
34 break;
35 }
36 }
37 up(&clocks_sem);
38
39 return clk;
40}
41EXPORT_SYMBOL(clk_get);
42
43void clk_put(struct clk *clk)
44{
45 module_put(clk->owner);
46}
47EXPORT_SYMBOL(clk_put);
48
49int clk_enable(struct clk *clk)
50{
51 return 0;
52}
53EXPORT_SYMBOL(clk_enable);
54
55void clk_disable(struct clk *clk)
56{
57}
58EXPORT_SYMBOL(clk_disable);
59
60int clk_use(struct clk *clk)
61{
62 return 0;
63}
64EXPORT_SYMBOL(clk_use);
65
66void clk_unuse(struct clk *clk)
67{
68}
69EXPORT_SYMBOL(clk_unuse);
70
71unsigned long clk_get_rate(struct clk *clk)
72{
73 return clk->rate;
74}
75EXPORT_SYMBOL(clk_get_rate);
76
77long clk_round_rate(struct clk *clk, unsigned long rate)
78{
79 return rate;
80}
81EXPORT_SYMBOL(clk_round_rate);
82
83int clk_set_rate(struct clk *clk, unsigned long rate)
84{
85 int ret = -EIO;
86
87 if (clk->setvco) {
88 struct icst307_vco vco;
89
90 vco = icst307_khz_to_vco(clk->params, rate / 1000);
91 clk->rate = icst307_khz(clk->params, vco) * 1000;
92
93 printk("Clock %s: setting VCO reg params: S=%d R=%d V=%d\n",
94 clk->name, vco.s, vco.r, vco.v);
95
96 clk->setvco(clk, vco);
97 ret = 0;
98 }
99 return ret;
100}
101EXPORT_SYMBOL(clk_set_rate);
102
103/*
104 * These are fixed clocks.
105 */
106static struct clk kmi_clk = {
107 .name = "KMIREFCLK",
108 .rate = 24000000,
109};
110
111static struct clk uart_clk = {
112 .name = "UARTCLK",
113 .rate = 24000000,
114};
115
116static struct clk mmci_clk = {
117 .name = "MCLK",
118 .rate = 33000000,
119};
120
121int clk_register(struct clk *clk)
122{
123 down(&clocks_sem);
124 list_add(&clk->node, &clocks);
125 up(&clocks_sem);
126 return 0;
127}
128EXPORT_SYMBOL(clk_register);
129
130void clk_unregister(struct clk *clk)
131{
132 down(&clocks_sem);
133 list_del(&clk->node);
134 up(&clocks_sem);
135}
136EXPORT_SYMBOL(clk_unregister);
137
138static int __init clk_init(void)
139{
140 clk_register(&kmi_clk);
141 clk_register(&uart_clk);
142 clk_register(&mmci_clk);
143 return 0;
144}
145arch_initcall(clk_init);
diff --git a/arch/arm/mach-realview/clock.h b/arch/arm/mach-realview/clock.h
new file mode 100644
index 000000000000..dadba695e181
--- /dev/null
+++ b/arch/arm/mach-realview/clock.h
@@ -0,0 +1,25 @@
1/*
2 * linux/arch/arm/mach-realview/clock.h
3 *
4 * Copyright (C) 2004 ARM Limited.
5 * Written by Deep Blue Solutions Limited.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11struct module;
12struct icst307_params;
13
14struct clk {
15 struct list_head node;
16 unsigned long rate;
17 struct module *owner;
18 const char *name;
19 const struct icst307_params *params;
20 void *data;
21 void (*setvco)(struct clk *, struct icst307_vco vco);
22};
23
24int clk_register(struct clk *clk);
25void clk_unregister(struct clk *clk);
diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
new file mode 100644
index 000000000000..4f98f13ad3ab
--- /dev/null
+++ b/arch/arm/mach-realview/core.c
@@ -0,0 +1,605 @@
1/*
2 * linux/arch/arm/mach-realview/core.c
3 *
4 * Copyright (C) 1999 - 2003 ARM Limited
5 * Copyright (C) 2000 Deep Blue Solutions Ltd
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21#include <linux/config.h>
22#include <linux/init.h>
23#include <linux/device.h>
24#include <linux/dma-mapping.h>
25#include <linux/sysdev.h>
26#include <linux/interrupt.h>
27
28#include <asm/system.h>
29#include <asm/hardware.h>
30#include <asm/io.h>
31#include <asm/irq.h>
32#include <asm/leds.h>
33#include <asm/mach-types.h>
34#include <asm/hardware/amba.h>
35#include <asm/hardware/amba_clcd.h>
36#include <asm/hardware/arm_timer.h>
37#include <asm/hardware/icst307.h>
38
39#include <asm/mach/arch.h>
40#include <asm/mach/flash.h>
41#include <asm/mach/irq.h>
42#include <asm/mach/time.h>
43#include <asm/mach/map.h>
44#include <asm/mach/mmc.h>
45
46#include <asm/hardware/gic.h>
47
48#include "core.h"
49#include "clock.h"
50
51#define REALVIEW_REFCOUNTER (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_24MHz_OFFSET)
52
53/*
54 * This is the RealView sched_clock implementation. This has
55 * a resolution of 41.7ns, and a maximum value of about 179s.
56 */
57unsigned long long sched_clock(void)
58{
59 unsigned long long v;
60
61 v = (unsigned long long)readl(REALVIEW_REFCOUNTER) * 125;
62 do_div(v, 3);
63
64 return v;
65}
66
67
68#define REALVIEW_FLASHCTRL (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_FLASH_OFFSET)
69
70static int realview_flash_init(void)
71{
72 u32 val;
73
74 val = __raw_readl(REALVIEW_FLASHCTRL);
75 val &= ~REALVIEW_FLASHPROG_FLVPPEN;
76 __raw_writel(val, REALVIEW_FLASHCTRL);
77
78 return 0;
79}
80
81static void realview_flash_exit(void)
82{
83 u32 val;
84
85 val = __raw_readl(REALVIEW_FLASHCTRL);
86 val &= ~REALVIEW_FLASHPROG_FLVPPEN;
87 __raw_writel(val, REALVIEW_FLASHCTRL);
88}
89
90static void realview_flash_set_vpp(int on)
91{
92 u32 val;
93
94 val = __raw_readl(REALVIEW_FLASHCTRL);
95 if (on)
96 val |= REALVIEW_FLASHPROG_FLVPPEN;
97 else
98 val &= ~REALVIEW_FLASHPROG_FLVPPEN;
99 __raw_writel(val, REALVIEW_FLASHCTRL);
100}
101
102static struct flash_platform_data realview_flash_data = {
103 .map_name = "cfi_probe",
104 .width = 4,
105 .init = realview_flash_init,
106 .exit = realview_flash_exit,
107 .set_vpp = realview_flash_set_vpp,
108};
109
110static struct resource realview_flash_resource = {
111 .start = REALVIEW_FLASH_BASE,
112 .end = REALVIEW_FLASH_BASE + REALVIEW_FLASH_SIZE,
113 .flags = IORESOURCE_MEM,
114};
115
116struct platform_device realview_flash_device = {
117 .name = "armflash",
118 .id = 0,
119 .dev = {
120 .platform_data = &realview_flash_data,
121 },
122 .num_resources = 1,
123 .resource = &realview_flash_resource,
124};
125
126static struct resource realview_smc91x_resources[] = {
127 [0] = {
128 .start = REALVIEW_ETH_BASE,
129 .end = REALVIEW_ETH_BASE + SZ_64K - 1,
130 .flags = IORESOURCE_MEM,
131 },
132 [1] = {
133 .start = IRQ_ETH,
134 .end = IRQ_ETH,
135 .flags = IORESOURCE_IRQ,
136 },
137};
138
139struct platform_device realview_smc91x_device = {
140 .name = "smc91x",
141 .id = 0,
142 .num_resources = ARRAY_SIZE(realview_smc91x_resources),
143 .resource = realview_smc91x_resources,
144};
145
146#define REALVIEW_SYSMCI (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_MCI_OFFSET)
147
148static unsigned int realview_mmc_status(struct device *dev)
149{
150 struct amba_device *adev = container_of(dev, struct amba_device, dev);
151 u32 mask;
152
153 if (adev->res.start == REALVIEW_MMCI0_BASE)
154 mask = 1;
155 else
156 mask = 2;
157
158 return readl(REALVIEW_SYSMCI) & mask;
159}
160
161struct mmc_platform_data realview_mmc0_plat_data = {
162 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
163 .status = realview_mmc_status,
164};
165
166struct mmc_platform_data realview_mmc1_plat_data = {
167 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
168 .status = realview_mmc_status,
169};
170
171/*
172 * Clock handling
173 */
174static const struct icst307_params realview_oscvco_params = {
175 .ref = 24000,
176 .vco_max = 200000,
177 .vd_min = 4 + 8,
178 .vd_max = 511 + 8,
179 .rd_min = 1 + 2,
180 .rd_max = 127 + 2,
181};
182
183static void realview_oscvco_set(struct clk *clk, struct icst307_vco vco)
184{
185 void __iomem *sys_lock = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LOCK_OFFSET;
186 void __iomem *sys_osc = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_OSC1_OFFSET;
187 u32 val;
188
189 val = readl(sys_osc) & ~0x7ffff;
190 val |= vco.v | (vco.r << 9) | (vco.s << 16);
191
192 writel(0xa05f, sys_lock);
193 writel(val, sys_osc);
194 writel(0, sys_lock);
195}
196
197struct clk realview_clcd_clk = {
198 .name = "CLCDCLK",
199 .params = &realview_oscvco_params,
200 .setvco = realview_oscvco_set,
201};
202
203/*
204 * CLCD support.
205 */
206#define SYS_CLCD_MODE_MASK (3 << 0)
207#define SYS_CLCD_MODE_888 (0 << 0)
208#define SYS_CLCD_MODE_5551 (1 << 0)
209#define SYS_CLCD_MODE_565_RLSB (2 << 0)
210#define SYS_CLCD_MODE_565_BLSB (3 << 0)
211#define SYS_CLCD_NLCDIOON (1 << 2)
212#define SYS_CLCD_VDDPOSSWITCH (1 << 3)
213#define SYS_CLCD_PWR3V5SWITCH (1 << 4)
214#define SYS_CLCD_ID_MASK (0x1f << 8)
215#define SYS_CLCD_ID_SANYO_3_8 (0x00 << 8)
216#define SYS_CLCD_ID_UNKNOWN_8_4 (0x01 << 8)
217#define SYS_CLCD_ID_EPSON_2_2 (0x02 << 8)
218#define SYS_CLCD_ID_SANYO_2_5 (0x07 << 8)
219#define SYS_CLCD_ID_VGA (0x1f << 8)
220
221static struct clcd_panel vga = {
222 .mode = {
223 .name = "VGA",
224 .refresh = 60,
225 .xres = 640,
226 .yres = 480,
227 .pixclock = 39721,
228 .left_margin = 40,
229 .right_margin = 24,
230 .upper_margin = 32,
231 .lower_margin = 11,
232 .hsync_len = 96,
233 .vsync_len = 2,
234 .sync = 0,
235 .vmode = FB_VMODE_NONINTERLACED,
236 },
237 .width = -1,
238 .height = -1,
239 .tim2 = TIM2_BCD | TIM2_IPC,
240 .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
241 .bpp = 16,
242};
243
244static struct clcd_panel sanyo_3_8_in = {
245 .mode = {
246 .name = "Sanyo QVGA",
247 .refresh = 116,
248 .xres = 320,
249 .yres = 240,
250 .pixclock = 100000,
251 .left_margin = 6,
252 .right_margin = 6,
253 .upper_margin = 5,
254 .lower_margin = 5,
255 .hsync_len = 6,
256 .vsync_len = 6,
257 .sync = 0,
258 .vmode = FB_VMODE_NONINTERLACED,
259 },
260 .width = -1,
261 .height = -1,
262 .tim2 = TIM2_BCD,
263 .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
264 .bpp = 16,
265};
266
267static struct clcd_panel sanyo_2_5_in = {
268 .mode = {
269 .name = "Sanyo QVGA Portrait",
270 .refresh = 116,
271 .xres = 240,
272 .yres = 320,
273 .pixclock = 100000,
274 .left_margin = 20,
275 .right_margin = 10,
276 .upper_margin = 2,
277 .lower_margin = 2,
278 .hsync_len = 10,
279 .vsync_len = 2,
280 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
281 .vmode = FB_VMODE_NONINTERLACED,
282 },
283 .width = -1,
284 .height = -1,
285 .tim2 = TIM2_IVS | TIM2_IHS | TIM2_IPC,
286 .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
287 .bpp = 16,
288};
289
290static struct clcd_panel epson_2_2_in = {
291 .mode = {
292 .name = "Epson QCIF",
293 .refresh = 390,
294 .xres = 176,
295 .yres = 220,
296 .pixclock = 62500,
297 .left_margin = 3,
298 .right_margin = 2,
299 .upper_margin = 1,
300 .lower_margin = 0,
301 .hsync_len = 3,
302 .vsync_len = 2,
303 .sync = 0,
304 .vmode = FB_VMODE_NONINTERLACED,
305 },
306 .width = -1,
307 .height = -1,
308 .tim2 = TIM2_BCD | TIM2_IPC,
309 .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
310 .bpp = 16,
311};
312
313/*
314 * Detect which LCD panel is connected, and return the appropriate
315 * clcd_panel structure. Note: we do not have any information on
316 * the required timings for the 8.4in panel, so we presently assume
317 * VGA timings.
318 */
319static struct clcd_panel *realview_clcd_panel(void)
320{
321 void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET;
322 struct clcd_panel *panel = &vga;
323 u32 val;
324
325 val = readl(sys_clcd) & SYS_CLCD_ID_MASK;
326 if (val == SYS_CLCD_ID_SANYO_3_8)
327 panel = &sanyo_3_8_in;
328 else if (val == SYS_CLCD_ID_SANYO_2_5)
329 panel = &sanyo_2_5_in;
330 else if (val == SYS_CLCD_ID_EPSON_2_2)
331 panel = &epson_2_2_in;
332 else if (val == SYS_CLCD_ID_VGA)
333 panel = &vga;
334 else {
335 printk(KERN_ERR "CLCD: unknown LCD panel ID 0x%08x, using VGA\n",
336 val);
337 panel = &vga;
338 }
339
340 return panel;
341}
342
343/*
344 * Disable all display connectors on the interface module.
345 */
346static void realview_clcd_disable(struct clcd_fb *fb)
347{
348 void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET;
349 u32 val;
350
351 val = readl(sys_clcd);
352 val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
353 writel(val, sys_clcd);
354}
355
356/*
357 * Enable the relevant connector on the interface module.
358 */
359static void realview_clcd_enable(struct clcd_fb *fb)
360{
361 void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET;
362 u32 val;
363
364 val = readl(sys_clcd);
365 val &= ~SYS_CLCD_MODE_MASK;
366
367 switch (fb->fb.var.green.length) {
368 case 5:
369 val |= SYS_CLCD_MODE_5551;
370 break;
371 case 6:
372 val |= SYS_CLCD_MODE_565_RLSB;
373 break;
374 case 8:
375 val |= SYS_CLCD_MODE_888;
376 break;
377 }
378
379 /*
380 * Set the MUX
381 */
382 writel(val, sys_clcd);
383
384 /*
385 * And now enable the PSUs
386 */
387 val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
388 writel(val, sys_clcd);
389}
390
391static unsigned long framesize = SZ_1M;
392
393static int realview_clcd_setup(struct clcd_fb *fb)
394{
395 dma_addr_t dma;
396
397 fb->panel = realview_clcd_panel();
398
399 fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, framesize,
400 &dma, GFP_KERNEL);
401 if (!fb->fb.screen_base) {
402 printk(KERN_ERR "CLCD: unable to map framebuffer\n");
403 return -ENOMEM;
404 }
405
406 fb->fb.fix.smem_start = dma;
407 fb->fb.fix.smem_len = framesize;
408
409 return 0;
410}
411
412static int realview_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
413{
414 return dma_mmap_writecombine(&fb->dev->dev, vma,
415 fb->fb.screen_base,
416 fb->fb.fix.smem_start,
417 fb->fb.fix.smem_len);
418}
419
420static void realview_clcd_remove(struct clcd_fb *fb)
421{
422 dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
423 fb->fb.screen_base, fb->fb.fix.smem_start);
424}
425
426struct clcd_board clcd_plat_data = {
427 .name = "RealView",
428 .check = clcdfb_check,
429 .decode = clcdfb_decode,
430 .disable = realview_clcd_disable,
431 .enable = realview_clcd_enable,
432 .setup = realview_clcd_setup,
433 .mmap = realview_clcd_mmap,
434 .remove = realview_clcd_remove,
435};
436
437#ifdef CONFIG_LEDS
438#define VA_LEDS_BASE (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LED_OFFSET)
439
440void realview_leds_event(led_event_t ledevt)
441{
442 unsigned long flags;
443 u32 val;
444
445 local_irq_save(flags);
446 val = readl(VA_LEDS_BASE);
447
448 switch (ledevt) {
449 case led_idle_start:
450 val = val & ~REALVIEW_SYS_LED0;
451 break;
452
453 case led_idle_end:
454 val = val | REALVIEW_SYS_LED0;
455 break;
456
457 case led_timer:
458 val = val ^ REALVIEW_SYS_LED1;
459 break;
460
461 case led_halted:
462 val = 0;
463 break;
464
465 default:
466 break;
467 }
468
469 writel(val, VA_LEDS_BASE);
470 local_irq_restore(flags);
471}
472#endif /* CONFIG_LEDS */
473
474/*
475 * Where is the timer (VA)?
476 */
477#define TIMER0_VA_BASE __io_address(REALVIEW_TIMER0_1_BASE)
478#define TIMER1_VA_BASE (__io_address(REALVIEW_TIMER0_1_BASE) + 0x20)
479#define TIMER2_VA_BASE __io_address(REALVIEW_TIMER2_3_BASE)
480#define TIMER3_VA_BASE (__io_address(REALVIEW_TIMER2_3_BASE) + 0x20)
481
482/*
483 * How long is the timer interval?
484 */
485#define TIMER_INTERVAL (TICKS_PER_uSEC * mSEC_10)
486#if TIMER_INTERVAL >= 0x100000
487#define TIMER_RELOAD (TIMER_INTERVAL >> 8)
488#define TIMER_DIVISOR (TIMER_CTRL_DIV256)
489#define TICKS2USECS(x) (256 * (x) / TICKS_PER_uSEC)
490#elif TIMER_INTERVAL >= 0x10000
491#define TIMER_RELOAD (TIMER_INTERVAL >> 4) /* Divide by 16 */
492#define TIMER_DIVISOR (TIMER_CTRL_DIV16)
493#define TICKS2USECS(x) (16 * (x) / TICKS_PER_uSEC)
494#else
495#define TIMER_RELOAD (TIMER_INTERVAL)
496#define TIMER_DIVISOR (TIMER_CTRL_DIV1)
497#define TICKS2USECS(x) ((x) / TICKS_PER_uSEC)
498#endif
499
500/*
501 * Returns number of ms since last clock interrupt. Note that interrupts
502 * will have been disabled by do_gettimeoffset()
503 */
504static unsigned long realview_gettimeoffset(void)
505{
506 unsigned long ticks1, ticks2, status;
507
508 /*
509 * Get the current number of ticks. Note that there is a race
510 * condition between us reading the timer and checking for
511 * an interrupt. We get around this by ensuring that the
512 * counter has not reloaded between our two reads.
513 */
514 ticks2 = readl(TIMER0_VA_BASE + TIMER_VALUE) & 0xffff;
515 do {
516 ticks1 = ticks2;
517 status = __raw_readl(__io_address(REALVIEW_GIC_DIST_BASE + GIC_DIST_PENDING_SET)
518 + ((IRQ_TIMERINT0_1 >> 5) << 2));
519 ticks2 = readl(TIMER0_VA_BASE + TIMER_VALUE) & 0xffff;
520 } while (ticks2 > ticks1);
521
522 /*
523 * Number of ticks since last interrupt.
524 */
525 ticks1 = TIMER_RELOAD - ticks2;
526
527 /*
528 * Interrupt pending? If so, we've reloaded once already.
529 *
530 * FIXME: Need to check this is effectively timer 0 that expires
531 */
532 if (status & IRQMASK_TIMERINT0_1)
533 ticks1 += TIMER_RELOAD;
534
535 /*
536 * Convert the ticks to usecs
537 */
538 return TICKS2USECS(ticks1);
539}
540
541/*
542 * IRQ handler for the timer
543 */
544static irqreturn_t realview_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
545{
546 write_seqlock(&xtime_lock);
547
548 // ...clear the interrupt
549 writel(1, TIMER0_VA_BASE + TIMER_INTCLR);
550
551 timer_tick(regs);
552
553 write_sequnlock(&xtime_lock);
554
555 return IRQ_HANDLED;
556}
557
558static struct irqaction realview_timer_irq = {
559 .name = "RealView Timer Tick",
560 .flags = SA_INTERRUPT | SA_TIMER,
561 .handler = realview_timer_interrupt,
562};
563
564/*
565 * Set up timer interrupt, and return the current time in seconds.
566 */
567static void __init realview_timer_init(void)
568{
569 u32 val;
570
571 /*
572 * set clock frequency:
573 * REALVIEW_REFCLK is 32KHz
574 * REALVIEW_TIMCLK is 1MHz
575 */
576 val = readl(__io_address(REALVIEW_SCTL_BASE));
577 writel((REALVIEW_TIMCLK << REALVIEW_TIMER1_EnSel) |
578 (REALVIEW_TIMCLK << REALVIEW_TIMER2_EnSel) |
579 (REALVIEW_TIMCLK << REALVIEW_TIMER3_EnSel) |
580 (REALVIEW_TIMCLK << REALVIEW_TIMER4_EnSel) | val,
581 __io_address(REALVIEW_SCTL_BASE));
582
583 /*
584 * Initialise to a known state (all timers off)
585 */
586 writel(0, TIMER0_VA_BASE + TIMER_CTRL);
587 writel(0, TIMER1_VA_BASE + TIMER_CTRL);
588 writel(0, TIMER2_VA_BASE + TIMER_CTRL);
589 writel(0, TIMER3_VA_BASE + TIMER_CTRL);
590
591 writel(TIMER_RELOAD, TIMER0_VA_BASE + TIMER_LOAD);
592 writel(TIMER_RELOAD, TIMER0_VA_BASE + TIMER_VALUE);
593 writel(TIMER_DIVISOR | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC |
594 TIMER_CTRL_IE, TIMER0_VA_BASE + TIMER_CTRL);
595
596 /*
597 * Make irqs happen for the system timer
598 */
599 setup_irq(IRQ_TIMERINT0_1, &realview_timer_irq);
600}
601
602struct sys_timer realview_timer = {
603 .init = realview_timer_init,
604 .offset = realview_gettimeoffset,
605};
diff --git a/arch/arm/mach-realview/core.h b/arch/arm/mach-realview/core.h
new file mode 100644
index 000000000000..575599db74db
--- /dev/null
+++ b/arch/arm/mach-realview/core.h
@@ -0,0 +1,118 @@
1/*
2 * linux/arch/arm/mach-realview/core.h
3 *
4 * Copyright (C) 2004 ARM Limited
5 * Copyright (C) 2000 Deep Blue Solutions Ltd
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#ifndef __ASM_ARCH_REALVIEW_H
23#define __ASM_ARCH_REALVIEW_H
24
25#include <asm/hardware/amba.h>
26#include <asm/io.h>
27
28#define __io_address(n) __io(IO_ADDRESS(n))
29
30extern struct sys_timer realview_timer;
31
32#define AMBA_DEVICE(name,busid,base,plat) \
33static struct amba_device name##_device = { \
34 .dev = { \
35 .coherent_dma_mask = ~0, \
36 .bus_id = busid, \
37 .platform_data = plat, \
38 }, \
39 .res = { \
40 .start = REALVIEW_##base##_BASE, \
41 .end = (REALVIEW_##base##_BASE) + SZ_4K - 1,\
42 .flags = IORESOURCE_MEM, \
43 }, \
44 .dma_mask = ~0, \
45 .irq = base##_IRQ, \
46 /* .dma = base##_DMA,*/ \
47}
48
49/*
50 * These devices are connected via the core APB bridge
51 */
52#define GPIO2_IRQ { IRQ_GPIOINT2, NO_IRQ }
53#define GPIO2_DMA { 0, 0 }
54#define GPIO3_IRQ { IRQ_GPIOINT3, NO_IRQ }
55#define GPIO3_DMA { 0, 0 }
56
57#define AACI_IRQ { IRQ_AACI, NO_IRQ }
58#define AACI_DMA { 0x80, 0x81 }
59#define MMCI0_IRQ { IRQ_MMCI0A,IRQ_MMCI0B }
60#define MMCI0_DMA { 0x84, 0 }
61#define KMI0_IRQ { IRQ_KMI0, NO_IRQ }
62#define KMI0_DMA { 0, 0 }
63#define KMI1_IRQ { IRQ_KMI1, NO_IRQ }
64#define KMI1_DMA { 0, 0 }
65
66/*
67 * These devices are connected directly to the multi-layer AHB switch
68 */
69#define SMC_IRQ { NO_IRQ, NO_IRQ }
70#define SMC_DMA { 0, 0 }
71#define MPMC_IRQ { NO_IRQ, NO_IRQ }
72#define MPMC_DMA { 0, 0 }
73#define CLCD_IRQ { IRQ_CLCDINT, NO_IRQ }
74#define CLCD_DMA { 0, 0 }
75#define DMAC_IRQ { IRQ_DMAINT, NO_IRQ }
76#define DMAC_DMA { 0, 0 }
77
78/*
79 * These devices are connected via the core APB bridge
80 */
81#define SCTL_IRQ { NO_IRQ, NO_IRQ }
82#define SCTL_DMA { 0, 0 }
83#define WATCHDOG_IRQ { IRQ_WDOGINT, NO_IRQ }
84#define WATCHDOG_DMA { 0, 0 }
85#define GPIO0_IRQ { IRQ_GPIOINT0, NO_IRQ }
86#define GPIO0_DMA { 0, 0 }
87#define GPIO1_IRQ { IRQ_GPIOINT1, NO_IRQ }
88#define GPIO1_DMA { 0, 0 }
89#define RTC_IRQ { IRQ_RTCINT, NO_IRQ }
90#define RTC_DMA { 0, 0 }
91
92/*
93 * These devices are connected via the DMA APB bridge
94 */
95#define SCI_IRQ { IRQ_SCIINT, NO_IRQ }
96#define SCI_DMA { 7, 6 }
97#define UART0_IRQ { IRQ_UARTINT0, NO_IRQ }
98#define UART0_DMA { 15, 14 }
99#define UART1_IRQ { IRQ_UARTINT1, NO_IRQ }
100#define UART1_DMA { 13, 12 }
101#define UART2_IRQ { IRQ_UARTINT2, NO_IRQ }
102#define UART2_DMA { 11, 10 }
103#define UART3_IRQ { IRQ_UART3, NO_IRQ }
104#define UART3_DMA { 0x86, 0x87 }
105#define SSP_IRQ { IRQ_SSPINT, NO_IRQ }
106#define SSP_DMA { 9, 8 }
107
108
109extern struct platform_device realview_flash_device;
110extern struct platform_device realview_smc91x_device;
111extern struct mmc_platform_data realview_mmc0_plat_data;
112extern struct mmc_platform_data realview_mmc1_plat_data;
113extern struct clk realview_clcd_clk;
114extern struct clcd_board clcd_plat_data;
115
116extern void realview_leds_event(led_event_t ledevt);
117
118#endif
diff --git a/arch/arm/mach-realview/realview_eb.c b/arch/arm/mach-realview/realview_eb.c
new file mode 100644
index 000000000000..1279feeecf7a
--- /dev/null
+++ b/arch/arm/mach-realview/realview_eb.c
@@ -0,0 +1,142 @@
1/*
2 * linux/arch/arm/mach-realview/realview_eb.c
3 *
4 * Copyright (C) 2004 ARM Limited
5 * Copyright (C) 2000 Deep Blue Solutions Ltd
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#include <linux/config.h>
23#include <linux/init.h>
24#include <linux/device.h>
25#include <linux/sysdev.h>
26
27#include <asm/hardware.h>
28#include <asm/io.h>
29#include <asm/irq.h>
30#include <asm/leds.h>
31#include <asm/mach-types.h>
32#include <asm/hardware/gic.h>
33#include <asm/hardware/amba.h>
34#include <asm/hardware/icst307.h>
35
36#include <asm/mach/arch.h>
37#include <asm/mach/map.h>
38#include <asm/mach/mmc.h>
39
40#include <asm/arch/irqs.h>
41
42#include "core.h"
43#include "clock.h"
44
45static struct map_desc realview_eb_io_desc[] __initdata = {
46 { IO_ADDRESS(REALVIEW_SYS_BASE), REALVIEW_SYS_BASE, SZ_4K, MT_DEVICE },
47 { IO_ADDRESS(REALVIEW_GIC_CPU_BASE), REALVIEW_GIC_CPU_BASE, SZ_4K, MT_DEVICE },
48 { IO_ADDRESS(REALVIEW_GIC_DIST_BASE), REALVIEW_GIC_DIST_BASE, SZ_4K, MT_DEVICE },
49 { IO_ADDRESS(REALVIEW_SCTL_BASE), REALVIEW_SCTL_BASE, SZ_4K, MT_DEVICE },
50 { IO_ADDRESS(REALVIEW_TIMER0_1_BASE), REALVIEW_TIMER0_1_BASE, SZ_4K, MT_DEVICE },
51 { IO_ADDRESS(REALVIEW_TIMER2_3_BASE), REALVIEW_TIMER2_3_BASE, SZ_4K, MT_DEVICE },
52#ifdef CONFIG_DEBUG_LL
53 { IO_ADDRESS(REALVIEW_UART0_BASE), REALVIEW_UART0_BASE, SZ_4K, MT_DEVICE },
54#endif
55};
56
57static void __init realview_eb_map_io(void)
58{
59 iotable_init(realview_eb_io_desc, ARRAY_SIZE(realview_eb_io_desc));
60}
61
62/* FPGA Primecells */
63AMBA_DEVICE(aaci, "fpga:04", AACI, NULL);
64AMBA_DEVICE(mmc0, "fpga:05", MMCI0, &realview_mmc0_plat_data);
65AMBA_DEVICE(kmi0, "fpga:06", KMI0, NULL);
66AMBA_DEVICE(kmi1, "fpga:07", KMI1, NULL);
67AMBA_DEVICE(uart3, "fpga:09", UART3, NULL);
68
69/* DevChip Primecells */
70AMBA_DEVICE(smc, "dev:00", SMC, NULL);
71AMBA_DEVICE(clcd, "dev:20", CLCD, &clcd_plat_data);
72AMBA_DEVICE(dmac, "dev:30", DMAC, NULL);
73AMBA_DEVICE(sctl, "dev:e0", SCTL, NULL);
74AMBA_DEVICE(wdog, "dev:e1", WATCHDOG, NULL);
75AMBA_DEVICE(gpio0, "dev:e4", GPIO0, NULL);
76AMBA_DEVICE(gpio1, "dev:e5", GPIO1, NULL);
77AMBA_DEVICE(gpio2, "dev:e6", GPIO2, NULL);
78AMBA_DEVICE(rtc, "dev:e8", RTC, NULL);
79AMBA_DEVICE(sci0, "dev:f0", SCI, NULL);
80AMBA_DEVICE(uart0, "dev:f1", UART0, NULL);
81AMBA_DEVICE(uart1, "dev:f2", UART1, NULL);
82AMBA_DEVICE(uart2, "dev:f3", UART2, NULL);
83AMBA_DEVICE(ssp0, "dev:f4", SSP, NULL);
84
85static struct amba_device *amba_devs[] __initdata = {
86 &dmac_device,
87 &uart0_device,
88 &uart1_device,
89 &uart2_device,
90 &uart3_device,
91 &smc_device,
92 &clcd_device,
93 &sctl_device,
94 &wdog_device,
95 &gpio0_device,
96 &gpio1_device,
97 &gpio2_device,
98 &rtc_device,
99 &sci0_device,
100 &ssp0_device,
101 &aaci_device,
102 &mmc0_device,
103 &kmi0_device,
104 &kmi1_device,
105};
106
107static void __init gic_init_irq(void)
108{
109 gic_dist_init(__io_address(REALVIEW_GIC_DIST_BASE));
110 gic_cpu_init(__io_address(REALVIEW_GIC_CPU_BASE));
111}
112
113static void __init realview_eb_init(void)
114{
115 int i;
116
117 clk_register(&realview_clcd_clk);
118
119 platform_device_register(&realview_flash_device);
120 platform_device_register(&realview_smc91x_device);
121
122 for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
123 struct amba_device *d = amba_devs[i];
124 amba_device_register(d, &iomem_resource);
125 }
126
127#ifdef CONFIG_LEDS
128 leds_event = realview_leds_event;
129#endif
130}
131
132MACHINE_START(REALVIEW_EB, "ARM-RealView EB")
133 /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
134 .phys_ram = 0x00000000,
135 .phys_io = REALVIEW_UART0_BASE,
136 .io_pg_offst = (IO_ADDRESS(REALVIEW_UART0_BASE) >> 18) & 0xfffc,
137 .boot_params = 0x00000100,
138 .map_io = realview_eb_map_io,
139 .init_irq = gic_init_irq,
140 .timer = &realview_timer,
141 .init_machine = realview_eb_init,
142MACHINE_END
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-25 02:32:43 -0500