mm: fix exec activate_mm vs TLB shootdown and lazy tlb switching race
[linux/fpc-iii.git] / arch / arm / mach-ep93xx / ts72xx.c
blob8745162ec05d3a887f940ecd84a0d90d2e736eca
1 /*
2 * arch/arm/mach-ep93xx/ts72xx.c
3 * Technologic Systems TS72xx SBC support.
5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
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 (at
10 * your option) any later version.
13 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/platform_device.h>
18 #include <linux/io.h>
19 #include <linux/mtd/rawnand.h>
20 #include <linux/mtd/partitions.h>
22 #include <mach/hardware.h>
24 #include <asm/mach-types.h>
25 #include <asm/mach/map.h>
26 #include <asm/mach/arch.h>
28 #include "soc.h"
29 #include "ts72xx.h"
31 static struct map_desc ts72xx_io_desc[] __initdata = {
33 .virtual = (unsigned long)TS72XX_MODEL_VIRT_BASE,
34 .pfn = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
35 .length = TS72XX_MODEL_SIZE,
36 .type = MT_DEVICE,
37 }, {
38 .virtual = (unsigned long)TS72XX_OPTIONS_VIRT_BASE,
39 .pfn = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
40 .length = TS72XX_OPTIONS_SIZE,
41 .type = MT_DEVICE,
42 }, {
43 .virtual = (unsigned long)TS72XX_OPTIONS2_VIRT_BASE,
44 .pfn = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
45 .length = TS72XX_OPTIONS2_SIZE,
46 .type = MT_DEVICE,
50 static void __init ts72xx_map_io(void)
52 ep93xx_map_io();
53 iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
57 /*************************************************************************
58 * NAND flash
59 *************************************************************************/
60 #define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */
61 #define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */
63 static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
64 int cmd, unsigned int ctrl)
66 struct nand_chip *chip = mtd_to_nand(mtd);
68 if (ctrl & NAND_CTRL_CHANGE) {
69 void __iomem *addr = chip->IO_ADDR_R;
70 unsigned char bits;
72 addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
74 bits = __raw_readb(addr) & ~0x07;
75 bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
76 bits |= (ctrl & NAND_CLE); /* bit 1 -> bit 1 */
77 bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
79 __raw_writeb(bits, addr);
82 if (cmd != NAND_CMD_NONE)
83 __raw_writeb(cmd, chip->IO_ADDR_W);
86 static int ts72xx_nand_device_ready(struct mtd_info *mtd)
88 struct nand_chip *chip = mtd_to_nand(mtd);
89 void __iomem *addr = chip->IO_ADDR_R;
91 addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
93 return !!(__raw_readb(addr) & 0x20);
96 #define TS72XX_BOOTROM_PART_SIZE (SZ_16K)
97 #define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M)
99 static struct mtd_partition ts72xx_nand_parts[] = {
101 .name = "TS-BOOTROM",
102 .offset = 0,
103 .size = TS72XX_BOOTROM_PART_SIZE,
104 .mask_flags = MTD_WRITEABLE, /* force read-only */
105 }, {
106 .name = "Linux",
107 .offset = MTDPART_OFS_RETAIN,
108 .size = TS72XX_REDBOOT_PART_SIZE,
109 /* leave so much for last partition */
110 }, {
111 .name = "RedBoot",
112 .offset = MTDPART_OFS_APPEND,
113 .size = MTDPART_SIZ_FULL,
114 .mask_flags = MTD_WRITEABLE, /* force read-only */
118 static struct platform_nand_data ts72xx_nand_data = {
119 .chip = {
120 .nr_chips = 1,
121 .chip_offset = 0,
122 .chip_delay = 15,
123 .partitions = ts72xx_nand_parts,
124 .nr_partitions = ARRAY_SIZE(ts72xx_nand_parts),
126 .ctrl = {
127 .cmd_ctrl = ts72xx_nand_hwcontrol,
128 .dev_ready = ts72xx_nand_device_ready,
132 static struct resource ts72xx_nand_resource[] = {
134 .start = 0, /* filled in later */
135 .end = 0, /* filled in later */
136 .flags = IORESOURCE_MEM,
140 static struct platform_device ts72xx_nand_flash = {
141 .name = "gen_nand",
142 .id = -1,
143 .dev.platform_data = &ts72xx_nand_data,
144 .resource = ts72xx_nand_resource,
145 .num_resources = ARRAY_SIZE(ts72xx_nand_resource),
149 static void __init ts72xx_register_flash(void)
152 * TS7200 has NOR flash all other TS72xx board have NAND flash.
154 if (board_is_ts7200()) {
155 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M);
156 } else {
157 resource_size_t start;
159 if (is_ts9420_installed())
160 start = EP93XX_CS7_PHYS_BASE;
161 else
162 start = EP93XX_CS6_PHYS_BASE;
164 ts72xx_nand_resource[0].start = start;
165 ts72xx_nand_resource[0].end = start + SZ_16M - 1;
167 platform_device_register(&ts72xx_nand_flash);
171 /*************************************************************************
172 * RTC M48T86
173 *************************************************************************/
174 #define TS72XX_RTC_INDEX_PHYS_BASE (EP93XX_CS1_PHYS_BASE + 0x00800000)
175 #define TS72XX_RTC_DATA_PHYS_BASE (EP93XX_CS1_PHYS_BASE + 0x01700000)
177 static struct resource ts72xx_rtc_resources[] = {
178 DEFINE_RES_MEM(TS72XX_RTC_INDEX_PHYS_BASE, 0x01),
179 DEFINE_RES_MEM(TS72XX_RTC_DATA_PHYS_BASE, 0x01),
182 static struct platform_device ts72xx_rtc_device = {
183 .name = "rtc-m48t86",
184 .id = -1,
185 .resource = ts72xx_rtc_resources,
186 .num_resources = ARRAY_SIZE(ts72xx_rtc_resources),
189 static struct resource ts72xx_wdt_resources[] = {
191 .start = TS72XX_WDT_CONTROL_PHYS_BASE,
192 .end = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1,
193 .flags = IORESOURCE_MEM,
196 .start = TS72XX_WDT_FEED_PHYS_BASE,
197 .end = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1,
198 .flags = IORESOURCE_MEM,
202 static struct platform_device ts72xx_wdt_device = {
203 .name = "ts72xx-wdt",
204 .id = -1,
205 .num_resources = ARRAY_SIZE(ts72xx_wdt_resources),
206 .resource = ts72xx_wdt_resources,
209 static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
210 .phy_id = 1,
213 #if IS_ENABLED(CONFIG_FPGA_MGR_TS73XX)
215 /* Relative to EP93XX_CS1_PHYS_BASE */
216 #define TS73XX_FPGA_LOADER_BASE 0x03c00000
218 static struct resource ts73xx_fpga_resources[] = {
220 .start = EP93XX_CS1_PHYS_BASE + TS73XX_FPGA_LOADER_BASE,
221 .end = EP93XX_CS1_PHYS_BASE + TS73XX_FPGA_LOADER_BASE + 1,
222 .flags = IORESOURCE_MEM,
226 static struct platform_device ts73xx_fpga_device = {
227 .name = "ts73xx-fpga-mgr",
228 .id = -1,
229 .resource = ts73xx_fpga_resources,
230 .num_resources = ARRAY_SIZE(ts73xx_fpga_resources),
233 #endif
235 static void __init ts72xx_init_machine(void)
237 ep93xx_init_devices();
238 ts72xx_register_flash();
239 platform_device_register(&ts72xx_rtc_device);
240 platform_device_register(&ts72xx_wdt_device);
242 ep93xx_register_eth(&ts72xx_eth_data, 1);
243 #if IS_ENABLED(CONFIG_FPGA_MGR_TS73XX)
244 if (board_is_ts7300())
245 platform_device_register(&ts73xx_fpga_device);
246 #endif
249 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
250 /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
251 .atag_offset = 0x100,
252 .map_io = ts72xx_map_io,
253 .init_irq = ep93xx_init_irq,
254 .init_time = ep93xx_timer_init,
255 .init_machine = ts72xx_init_machine,
256 .init_late = ep93xx_init_late,
257 .restart = ep93xx_restart,
258 MACHINE_END