Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[deliverable/linux.git] / arch / arm / mach-integrator / integrator_cp.c
CommitLineData
1da177e4
LT
1/*
2 * linux/arch/arm/mach-integrator/integrator_cp.c
3 *
4 * Copyright (C) 2003 Deep Blue Solutions Ltd
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 as published by
8 * the Free Software Foundation; either version 2 of the License.
9 */
10#include <linux/types.h>
11#include <linux/kernel.h>
12#include <linux/init.h>
13#include <linux/list.h>
d052d1be 14#include <linux/platform_device.h>
1da177e4 15#include <linux/dma-mapping.h>
1da177e4 16#include <linux/string.h>
edbaa603 17#include <linux/device.h>
a62c80e5
RK
18#include <linux/amba/bus.h>
19#include <linux/amba/kmi.h>
20#include <linux/amba/clcd.h>
11c32d7b 21#include <linux/platform_data/video-clcd-versatile.h>
6ef297f8 22#include <linux/amba/mmci.h>
fced80c7 23#include <linux/io.h>
44fa72d1 24#include <linux/irqchip.h>
5a0e3ad6 25#include <linux/gfp.h>
046dfa0a 26#include <linux/mtd/physmap.h>
4980f9bc
LW
27#include <linux/of_irq.h>
28#include <linux/of_address.h>
4672cddf 29#include <linux/of_platform.h>
a79528e9 30#include <linux/sched_clock.h>
1da177e4 31
1da177e4
LT
32#include <asm/setup.h>
33#include <asm/mach-types.h>
1da177e4 34#include <asm/mach/arch.h>
1da177e4 35#include <asm/mach/irq.h>
1da177e4
LT
36#include <asm/mach/map.h>
37#include <asm/mach/time.h>
38
1b1ef755 39#include "hardware.h"
bb4dbefe 40#include "cm.h"
98c672cf
RK
41#include "common.h"
42
e6fae083
LW
43/* Base address to the CP controller */
44static void __iomem *intcp_con_base;
45
1da177e4 46#define INTCP_PA_FLASH_BASE 0x24000000
1da177e4
LT
47
48#define INTCP_PA_CLCD_BASE 0xc0000000
49
1da177e4
LT
50#define INTCP_FLASHPROG 0x04
51#define CINTEGRATOR_FLASHPROG_FLVPPEN (1 << 0)
52#define CINTEGRATOR_FLASHPROG_FLWREN (1 << 1)
53
54/*
55 * Logical Physical
608914b3 56 * f1000000 10000000 Core module registers
1da177e4
LT
57 * f1300000 13000000 Counter/Timer
58 * f1400000 14000000 Interrupt controller
59 * f1600000 16000000 UART 0
60 * f1700000 17000000 UART 1
61 * f1a00000 1a000000 Debug LEDs
da7ba956
RK
62 * fc900000 c9000000 GPIO
63 * fca00000 ca000000 SIC
1da177e4
LT
64 */
65
060fd1be 66static struct map_desc intcp_io_desc[] __initdata __maybe_unused = {
c8d27298 67 {
608914b3
LW
68 .virtual = IO_ADDRESS(INTEGRATOR_HDR_BASE),
69 .pfn = __phys_to_pfn(INTEGRATOR_HDR_BASE),
70 .length = SZ_4K,
71 .type = MT_DEVICE
72 }, {
c8d27298
DS
73 .virtual = IO_ADDRESS(INTEGRATOR_CT_BASE),
74 .pfn = __phys_to_pfn(INTEGRATOR_CT_BASE),
75 .length = SZ_4K,
76 .type = MT_DEVICE
77 }, {
78 .virtual = IO_ADDRESS(INTEGRATOR_IC_BASE),
79 .pfn = __phys_to_pfn(INTEGRATOR_IC_BASE),
80 .length = SZ_4K,
81 .type = MT_DEVICE
82 }, {
83 .virtual = IO_ADDRESS(INTEGRATOR_UART0_BASE),
84 .pfn = __phys_to_pfn(INTEGRATOR_UART0_BASE),
85 .length = SZ_4K,
86 .type = MT_DEVICE
c8d27298
DS
87 }, {
88 .virtual = IO_ADDRESS(INTEGRATOR_DBG_BASE),
89 .pfn = __phys_to_pfn(INTEGRATOR_DBG_BASE),
90 .length = SZ_4K,
91 .type = MT_DEVICE
92 }, {
da7ba956
RK
93 .virtual = IO_ADDRESS(INTEGRATOR_CP_GPIO_BASE),
94 .pfn = __phys_to_pfn(INTEGRATOR_CP_GPIO_BASE),
c8d27298
DS
95 .length = SZ_4K,
96 .type = MT_DEVICE
97 }, {
da7ba956
RK
98 .virtual = IO_ADDRESS(INTEGRATOR_CP_SIC_BASE),
99 .pfn = __phys_to_pfn(INTEGRATOR_CP_SIC_BASE),
c8d27298
DS
100 .length = SZ_4K,
101 .type = MT_DEVICE
c8d27298 102 }
1da177e4
LT
103};
104
105static void __init intcp_map_io(void)
106{
107 iotable_init(intcp_io_desc, ARRAY_SIZE(intcp_io_desc));
108}
109
1da177e4
LT
110/*
111 * Flash handling.
112 */
046dfa0a 113static int intcp_flash_init(struct platform_device *dev)
1da177e4
LT
114{
115 u32 val;
116
e6fae083 117 val = readl(intcp_con_base + INTCP_FLASHPROG);
1da177e4 118 val |= CINTEGRATOR_FLASHPROG_FLWREN;
e6fae083 119 writel(val, intcp_con_base + INTCP_FLASHPROG);
1da177e4
LT
120
121 return 0;
122}
123
046dfa0a 124static void intcp_flash_exit(struct platform_device *dev)
1da177e4
LT
125{
126 u32 val;
127
e6fae083 128 val = readl(intcp_con_base + INTCP_FLASHPROG);
1da177e4 129 val &= ~(CINTEGRATOR_FLASHPROG_FLVPPEN|CINTEGRATOR_FLASHPROG_FLWREN);
e6fae083 130 writel(val, intcp_con_base + INTCP_FLASHPROG);
1da177e4
LT
131}
132
667f390b 133static void intcp_flash_set_vpp(struct platform_device *pdev, int on)
1da177e4
LT
134{
135 u32 val;
136
e6fae083 137 val = readl(intcp_con_base + INTCP_FLASHPROG);
1da177e4
LT
138 if (on)
139 val |= CINTEGRATOR_FLASHPROG_FLVPPEN;
140 else
141 val &= ~CINTEGRATOR_FLASHPROG_FLVPPEN;
e6fae083 142 writel(val, intcp_con_base + INTCP_FLASHPROG);
1da177e4
LT
143}
144
046dfa0a 145static struct physmap_flash_data intcp_flash_data = {
1da177e4
LT
146 .width = 4,
147 .init = intcp_flash_init,
148 .exit = intcp_flash_exit,
149 .set_vpp = intcp_flash_set_vpp,
150};
151
1da177e4
LT
152/*
153 * It seems that the card insertion interrupt remains active after
154 * we've acknowledged it. We therefore ignore the interrupt, and
155 * rely on reading it from the SIC. This also means that we must
156 * clear the latched interrupt.
157 */
158static unsigned int mmc_status(struct device *dev)
159{
b7a3f8db 160 unsigned int status = readl(__io_address(0xca000000 + 4));
e6fae083 161 writel(8, intcp_con_base + 8);
1da177e4
LT
162
163 return status & 8;
164}
165
6ef297f8 166static struct mmci_platform_data mmc_data = {
1da177e4
LT
167 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
168 .status = mmc_status,
7fb2bbf4
RK
169 .gpio_wp = -1,
170 .gpio_cd = -1,
1da177e4
LT
171};
172
1da177e4
LT
173/*
174 * CLCD support
175 */
1da177e4
LT
176/*
177 * Ensure VGA is selected.
178 */
179static void cp_clcd_enable(struct clcd_fb *fb)
180{
e6b9c1f8 181 struct fb_var_screeninfo *var = &fb->fb.var;
30aeadd4
JA
182 u32 val = CM_CTRL_STATIC1 | CM_CTRL_STATIC2
183 | CM_CTRL_LCDEN0 | CM_CTRL_LCDEN1;
4774e226 184
e6b9c1f8
RK
185 if (var->bits_per_pixel <= 8 ||
186 (var->bits_per_pixel == 16 && var->green.length == 5))
187 /* Pseudocolor, RGB555, BGR555 */
188 val |= CM_CTRL_LCDMUXSEL_VGA555_TFT555;
4774e226 189 else if (fb->fb.var.bits_per_pixel <= 16)
e6b9c1f8
RK
190 /* truecolor RGB565 */
191 val |= CM_CTRL_LCDMUXSEL_VGA565_TFT555;
4774e226
RK
192 else
193 val = 0; /* no idea for this, don't trust the docs */
194
195 cm_control(CM_CTRL_LCDMUXSEL_MASK|
196 CM_CTRL_LCDEN0|
197 CM_CTRL_LCDEN1|
198 CM_CTRL_STATIC1|
199 CM_CTRL_STATIC2|
200 CM_CTRL_STATIC|
201 CM_CTRL_n24BITEN, val);
1da177e4
LT
202}
203
1da177e4
LT
204static int cp_clcd_setup(struct clcd_fb *fb)
205{
9dfec4fe
RK
206 fb->panel = versatile_clcd_get_panel("VGA");
207 if (!fb->panel)
208 return -EINVAL;
1da177e4 209
9dfec4fe 210 return versatile_clcd_setup_dma(fb, SZ_1M);
1da177e4
LT
211}
212
213static struct clcd_board clcd_data = {
214 .name = "Integrator/CP",
9dfec4fe 215 .caps = CLCD_CAP_5551 | CLCD_CAP_RGB565 | CLCD_CAP_888,
1da177e4
LT
216 .check = clcdfb_check,
217 .decode = clcdfb_decode,
218 .enable = cp_clcd_enable,
219 .setup = cp_clcd_setup,
9dfec4fe
RK
220 .mmap = versatile_clcd_mmap_dma,
221 .remove = versatile_clcd_remove_dma,
1da177e4
LT
222};
223
d77e270c
RK
224#define REFCOUNTER (__io_address(INTEGRATOR_HDR_BASE) + 0x28)
225
a79528e9
LW
226static u64 notrace intcp_read_sched_clock(void)
227{
228 return readl(REFCOUNTER);
229}
230
c735c987
RK
231static void __init intcp_init_early(void)
232{
a79528e9 233 sched_clock_register(intcp_read_sched_clock, 32, 24000000);
c735c987
RK
234}
235
4980f9bc 236static void __init intcp_init_irq_of(void)
1da177e4 237{
bb4dbefe 238 cm_init();
44fa72d1 239 irqchip_init();
4980f9bc 240}
1da177e4 241
4672cddf
LW
242/*
243 * For the Device Tree, add in the UART, MMC and CLCD specifics as AUXDATA
244 * and enforce the bus names since these are used for clock lookups.
245 */
246static struct of_dev_auxdata intcp_auxdata_lookup[] __initdata = {
247 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_RTC_BASE,
248 "rtc", NULL),
249 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART0_BASE,
379df279 250 "uart0", NULL),
4672cddf 251 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART1_BASE,
379df279 252 "uart1", NULL),
4672cddf
LW
253 OF_DEV_AUXDATA("arm,primecell", KMI0_BASE,
254 "kmi0", NULL),
255 OF_DEV_AUXDATA("arm,primecell", KMI1_BASE,
256 "kmi1", NULL),
257 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_CP_MMC_BASE,
258 "mmci", &mmc_data),
259 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_CP_AACI_BASE,
260 "aaci", &mmc_data),
261 OF_DEV_AUXDATA("arm,primecell", INTCP_PA_CLCD_BASE,
262 "clcd", &clcd_data),
73efd530
LW
263 OF_DEV_AUXDATA("cfi-flash", INTCP_PA_FLASH_BASE,
264 "physmap-flash", &intcp_flash_data),
4672cddf
LW
265 { /* sentinel */ },
266};
267
df36680f
LW
268static const struct of_device_id intcp_syscon_match[] = {
269 { .compatible = "arm,integrator-cp-syscon"},
270 { },
271};
272
4672cddf
LW
273static void __init intcp_init_of(void)
274{
64100a03 275 struct device_node *cpcon;
64100a03 276
11f9323a 277 cpcon = of_find_matching_node(NULL, intcp_syscon_match);
64100a03
LW
278 if (!cpcon)
279 return;
280
281 intcp_con_base = of_iomap(cpcon, 0);
282 if (!intcp_con_base)
283 return;
284
11f9323a
LW
285 of_platform_populate(NULL, of_default_bus_match_table,
286 intcp_auxdata_lookup, NULL);
4672cddf
LW
287}
288
4980f9bc
LW
289static const char * intcp_dt_board_compat[] = {
290 "arm,integrator-cp",
291 NULL,
292};
1da177e4 293
4980f9bc
LW
294DT_MACHINE_START(INTEGRATOR_CP_DT, "ARM Integrator/CP (Device Tree)")
295 .reserve = integrator_reserve,
296 .map_io = intcp_map_io,
4980f9bc
LW
297 .init_early = intcp_init_early,
298 .init_irq = intcp_init_irq_of,
4672cddf 299 .init_machine = intcp_init_of,
4980f9bc
LW
300 .dt_compat = intcp_dt_board_compat,
301MACHINE_END
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