Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-sa1100/generic.c |
| 3 | * |
| 4 | * Author: Nicolas Pitre |
| 5 | * |
| 6 | * Code common to all SA11x0 machines. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
Russell King | 2f8163b | 2011-07-26 10:53:52 +0100 | [diff] [blame] | 12 | #include <linux/gpio.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/module.h> |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/delay.h> |
Russell King | 7931d92 | 2012-01-09 21:45:51 +0000 | [diff] [blame] | 17 | #include <linux/dma-mapping.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/pm.h> |
| 19 | #include <linux/cpufreq.h> |
| 20 | #include <linux/ioport.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 21 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
Russell King | e1b7a72 | 2012-01-14 11:50:04 +0000 | [diff] [blame] | 23 | #include <video/sa1100fb.h> |
| 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <asm/div64.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <asm/mach/map.h> |
Russell King | 14e66f7 | 2005-10-29 16:08:31 +0100 | [diff] [blame] | 27 | #include <asm/mach/flash.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <asm/irq.h> |
David Howells | 9f97da7 | 2012-03-28 18:30:01 +0100 | [diff] [blame] | 29 | #include <asm/system_misc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
Rob Herring | f314f33 | 2012-02-24 00:06:51 +0100 | [diff] [blame] | 31 | #include <mach/hardware.h> |
| 32 | #include <mach/irqs.h> |
| 33 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include "generic.h" |
| 35 | |
Eric Miao | 04fef22 | 2008-07-29 14:26:00 +0800 | [diff] [blame] | 36 | unsigned int reset_status; |
| 37 | EXPORT_SYMBOL(reset_status); |
| 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #define NR_FREQS 16 |
| 40 | |
| 41 | /* |
| 42 | * This table is setup for a 3.6864MHz Crystal. |
| 43 | */ |
| 44 | static const unsigned short cclk_frequency_100khz[NR_FREQS] = { |
| 45 | 590, /* 59.0 MHz */ |
| 46 | 737, /* 73.7 MHz */ |
Kristoffer Ericson | bda0308 | 2008-09-29 17:09:10 +0100 | [diff] [blame] | 47 | 885, /* 88.5 MHz */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | 1032, /* 103.2 MHz */ |
| 49 | 1180, /* 118.0 MHz */ |
| 50 | 1327, /* 132.7 MHz */ |
| 51 | 1475, /* 147.5 MHz */ |
| 52 | 1622, /* 162.2 MHz */ |
| 53 | 1769, /* 176.9 MHz */ |
| 54 | 1917, /* 191.7 MHz */ |
| 55 | 2064, /* 206.4 MHz */ |
| 56 | 2212, /* 221.2 MHz */ |
Kristoffer Ericson | bda0308 | 2008-09-29 17:09:10 +0100 | [diff] [blame] | 57 | 2359, /* 235.9 MHz */ |
| 58 | 2507, /* 250.7 MHz */ |
| 59 | 2654, /* 265.4 MHz */ |
| 60 | 2802 /* 280.2 MHz */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | }; |
| 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | /* rounds up(!) */ |
| 64 | unsigned int sa11x0_freq_to_ppcr(unsigned int khz) |
| 65 | { |
| 66 | int i; |
| 67 | |
| 68 | khz /= 100; |
| 69 | |
| 70 | for (i = 0; i < NR_FREQS; i++) |
| 71 | if (cclk_frequency_100khz[i] >= khz) |
| 72 | break; |
| 73 | |
| 74 | return i; |
| 75 | } |
| 76 | |
| 77 | unsigned int sa11x0_ppcr_to_freq(unsigned int idx) |
| 78 | { |
| 79 | unsigned int freq = 0; |
| 80 | if (idx < NR_FREQS) |
| 81 | freq = cclk_frequency_100khz[idx] * 100; |
| 82 | return freq; |
| 83 | } |
| 84 | |
| 85 | |
| 86 | /* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on |
| 87 | * this platform, anyway. |
| 88 | */ |
| 89 | int sa11x0_verify_speed(struct cpufreq_policy *policy) |
| 90 | { |
| 91 | unsigned int tmp; |
| 92 | if (policy->cpu) |
| 93 | return -EINVAL; |
| 94 | |
| 95 | cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq); |
| 96 | |
| 97 | /* make sure that at least one frequency is within the policy */ |
| 98 | tmp = cclk_frequency_100khz[sa11x0_freq_to_ppcr(policy->min)] * 100; |
| 99 | if (tmp > policy->max) |
| 100 | policy->max = tmp; |
| 101 | |
| 102 | cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq); |
| 103 | |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | unsigned int sa11x0_getspeed(unsigned int cpu) |
| 108 | { |
| 109 | if (cpu) |
| 110 | return 0; |
| 111 | return cclk_frequency_100khz[PPCR & 0xf] * 100; |
| 112 | } |
| 113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | * Default power-off for SA1100 |
| 116 | */ |
| 117 | static void sa1100_power_off(void) |
| 118 | { |
| 119 | mdelay(100); |
| 120 | local_irq_disable(); |
| 121 | /* disable internal oscillator, float CS lines */ |
| 122 | PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS); |
| 123 | /* enable wake-up on GPIO0 (Assabet...) */ |
| 124 | PWER = GFER = GRER = 1; |
| 125 | /* |
| 126 | * set scratchpad to zero, just in case it is used as a |
| 127 | * restart address by the bootloader. |
| 128 | */ |
| 129 | PSPR = 0; |
| 130 | /* enter sleep mode */ |
| 131 | PMCR = PMCR_SF; |
| 132 | } |
| 133 | |
Russell King | d9ca583 | 2011-11-05 10:28:50 +0000 | [diff] [blame] | 134 | void sa11x0_restart(char mode, const char *cmd) |
| 135 | { |
| 136 | if (mode == 's') { |
| 137 | /* Jump into ROM at address 0 */ |
| 138 | soft_restart(0); |
| 139 | } else { |
| 140 | /* Use on-chip reset capability */ |
| 141 | RSRR = RSRR_SWR; |
| 142 | } |
| 143 | } |
| 144 | |
Russell King | 7a5b4e1 | 2009-10-06 14:55:53 +0100 | [diff] [blame] | 145 | static void sa11x0_register_device(struct platform_device *dev, void *data) |
| 146 | { |
| 147 | int err; |
| 148 | dev->dev.platform_data = data; |
| 149 | err = platform_device_register(dev); |
| 150 | if (err) |
| 151 | printk(KERN_ERR "Unable to register device %s: %d\n", |
| 152 | dev->name, err); |
| 153 | } |
| 154 | |
| 155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | static struct resource sa11x0udc_resources[] = { |
Russell King | a181099 | 2012-01-12 10:25:29 +0000 | [diff] [blame] | 157 | [0] = DEFINE_RES_MEM(__PREG(Ser0UDCCR), SZ_64K), |
| 158 | [1] = DEFINE_RES_IRQ(IRQ_Ser0UDC), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | }; |
| 160 | |
| 161 | static u64 sa11x0udc_dma_mask = 0xffffffffUL; |
| 162 | |
| 163 | static struct platform_device sa11x0udc_device = { |
| 164 | .name = "sa11x0-udc", |
| 165 | .id = -1, |
| 166 | .dev = { |
| 167 | .dma_mask = &sa11x0udc_dma_mask, |
| 168 | .coherent_dma_mask = 0xffffffff, |
| 169 | }, |
| 170 | .num_resources = ARRAY_SIZE(sa11x0udc_resources), |
| 171 | .resource = sa11x0udc_resources, |
| 172 | }; |
| 173 | |
| 174 | static struct resource sa11x0uart1_resources[] = { |
Russell King | a181099 | 2012-01-12 10:25:29 +0000 | [diff] [blame] | 175 | [0] = DEFINE_RES_MEM(__PREG(Ser1UTCR0), SZ_64K), |
| 176 | [1] = DEFINE_RES_IRQ(IRQ_Ser1UART), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | }; |
| 178 | |
| 179 | static struct platform_device sa11x0uart1_device = { |
| 180 | .name = "sa11x0-uart", |
| 181 | .id = 1, |
| 182 | .num_resources = ARRAY_SIZE(sa11x0uart1_resources), |
| 183 | .resource = sa11x0uart1_resources, |
| 184 | }; |
| 185 | |
| 186 | static struct resource sa11x0uart3_resources[] = { |
Russell King | a181099 | 2012-01-12 10:25:29 +0000 | [diff] [blame] | 187 | [0] = DEFINE_RES_MEM(__PREG(Ser3UTCR0), SZ_64K), |
| 188 | [1] = DEFINE_RES_IRQ(IRQ_Ser3UART), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | }; |
| 190 | |
| 191 | static struct platform_device sa11x0uart3_device = { |
| 192 | .name = "sa11x0-uart", |
| 193 | .id = 3, |
| 194 | .num_resources = ARRAY_SIZE(sa11x0uart3_resources), |
| 195 | .resource = sa11x0uart3_resources, |
| 196 | }; |
| 197 | |
| 198 | static struct resource sa11x0mcp_resources[] = { |
Russell King | a181099 | 2012-01-12 10:25:29 +0000 | [diff] [blame] | 199 | [0] = DEFINE_RES_MEM(__PREG(Ser4MCCR0), SZ_64K), |
Russell King | 7256ecc | 2012-03-25 23:56:30 +0100 | [diff] [blame] | 200 | [1] = DEFINE_RES_MEM(__PREG(Ser4MCCR1), 4), |
| 201 | [2] = DEFINE_RES_IRQ(IRQ_Ser4MCP), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | }; |
| 203 | |
| 204 | static u64 sa11x0mcp_dma_mask = 0xffffffffUL; |
| 205 | |
| 206 | static struct platform_device sa11x0mcp_device = { |
| 207 | .name = "sa11x0-mcp", |
| 208 | .id = -1, |
| 209 | .dev = { |
| 210 | .dma_mask = &sa11x0mcp_dma_mask, |
| 211 | .coherent_dma_mask = 0xffffffff, |
| 212 | }, |
| 213 | .num_resources = ARRAY_SIZE(sa11x0mcp_resources), |
| 214 | .resource = sa11x0mcp_resources, |
| 215 | }; |
| 216 | |
Russell King | e36e26a | 2012-01-20 22:24:07 +0000 | [diff] [blame] | 217 | void __init sa11x0_ppc_configure_mcp(void) |
| 218 | { |
| 219 | /* Setup the PPC unit for the MCP */ |
| 220 | PPDR &= ~PPC_RXD4; |
| 221 | PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM; |
| 222 | PSDR |= PPC_RXD4; |
| 223 | PSDR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM); |
| 224 | PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM); |
| 225 | } |
| 226 | |
Russell King | 7a5b4e1 | 2009-10-06 14:55:53 +0100 | [diff] [blame] | 227 | void sa11x0_register_mcp(struct mcp_plat_data *data) |
Russell King | 323cdfc | 2005-08-18 10:10:46 +0100 | [diff] [blame] | 228 | { |
Russell King | 7a5b4e1 | 2009-10-06 14:55:53 +0100 | [diff] [blame] | 229 | sa11x0_register_device(&sa11x0mcp_device, data); |
Russell King | 323cdfc | 2005-08-18 10:10:46 +0100 | [diff] [blame] | 230 | } |
| 231 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | static struct resource sa11x0ssp_resources[] = { |
Russell King | a181099 | 2012-01-12 10:25:29 +0000 | [diff] [blame] | 233 | [0] = DEFINE_RES_MEM(0x80070000, SZ_64K), |
| 234 | [1] = DEFINE_RES_IRQ(IRQ_Ser4SSP), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | }; |
| 236 | |
| 237 | static u64 sa11x0ssp_dma_mask = 0xffffffffUL; |
| 238 | |
| 239 | static struct platform_device sa11x0ssp_device = { |
| 240 | .name = "sa11x0-ssp", |
| 241 | .id = -1, |
| 242 | .dev = { |
| 243 | .dma_mask = &sa11x0ssp_dma_mask, |
| 244 | .coherent_dma_mask = 0xffffffff, |
| 245 | }, |
| 246 | .num_resources = ARRAY_SIZE(sa11x0ssp_resources), |
| 247 | .resource = sa11x0ssp_resources, |
| 248 | }; |
| 249 | |
| 250 | static struct resource sa11x0fb_resources[] = { |
Russell King | a181099 | 2012-01-12 10:25:29 +0000 | [diff] [blame] | 251 | [0] = DEFINE_RES_MEM(0xb0100000, SZ_64K), |
| 252 | [1] = DEFINE_RES_IRQ(IRQ_LCD), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | }; |
| 254 | |
| 255 | static struct platform_device sa11x0fb_device = { |
| 256 | .name = "sa11x0-fb", |
| 257 | .id = -1, |
| 258 | .dev = { |
| 259 | .coherent_dma_mask = 0xffffffff, |
| 260 | }, |
| 261 | .num_resources = ARRAY_SIZE(sa11x0fb_resources), |
| 262 | .resource = sa11x0fb_resources, |
| 263 | }; |
| 264 | |
Russell King | e1b7a72 | 2012-01-14 11:50:04 +0000 | [diff] [blame] | 265 | void sa11x0_register_lcd(struct sa1100fb_mach_info *inf) |
| 266 | { |
| 267 | sa11x0_register_device(&sa11x0fb_device, inf); |
| 268 | } |
| 269 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | static struct platform_device sa11x0pcmcia_device = { |
| 271 | .name = "sa11x0-pcmcia", |
| 272 | .id = -1, |
| 273 | }; |
| 274 | |
| 275 | static struct platform_device sa11x0mtd_device = { |
Uwe Kleine-König | bcc8f3e | 2009-01-31 01:21:58 +0100 | [diff] [blame] | 276 | .name = "sa1100-mtd", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | .id = -1, |
| 278 | }; |
| 279 | |
Russell King | 7a5b4e1 | 2009-10-06 14:55:53 +0100 | [diff] [blame] | 280 | void sa11x0_register_mtd(struct flash_platform_data *flash, |
| 281 | struct resource *res, int nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | { |
Russell King | 14e66f7 | 2005-10-29 16:08:31 +0100 | [diff] [blame] | 283 | flash->name = "sa1100"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | sa11x0mtd_device.resource = res; |
| 285 | sa11x0mtd_device.num_resources = nr; |
Russell King | 7a5b4e1 | 2009-10-06 14:55:53 +0100 | [diff] [blame] | 286 | sa11x0_register_device(&sa11x0mtd_device, flash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | static struct resource sa11x0ir_resources[] = { |
Russell King | a181099 | 2012-01-12 10:25:29 +0000 | [diff] [blame] | 290 | DEFINE_RES_MEM(__PREG(Ser2UTCR0), 0x24), |
| 291 | DEFINE_RES_MEM(__PREG(Ser2HSCR0), 0x1c), |
| 292 | DEFINE_RES_MEM(__PREG(Ser2HSCR2), 0x04), |
| 293 | DEFINE_RES_IRQ(IRQ_Ser2ICP), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | }; |
| 295 | |
| 296 | static struct platform_device sa11x0ir_device = { |
| 297 | .name = "sa11x0-ir", |
| 298 | .id = -1, |
| 299 | .num_resources = ARRAY_SIZE(sa11x0ir_resources), |
| 300 | .resource = sa11x0ir_resources, |
| 301 | }; |
| 302 | |
Russell King | 7a5b4e1 | 2009-10-06 14:55:53 +0100 | [diff] [blame] | 303 | void sa11x0_register_irda(struct irda_platform_data *irda) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | { |
Russell King | 7a5b4e1 | 2009-10-06 14:55:53 +0100 | [diff] [blame] | 305 | sa11x0_register_device(&sa11x0ir_device, irda); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | } |
| 307 | |
Haojian Zhuang | 3888c09 | 2012-02-21 11:51:13 +0800 | [diff] [blame] | 308 | static struct resource sa1100_rtc_resources[] = { |
Dmitry Artamonow | 9f9d27e | 2012-04-14 10:26:19 +0400 | [diff] [blame^] | 309 | DEFINE_RES_MEM(0x90010000, 0x40), |
Haojian Zhuang | 3888c09 | 2012-02-21 11:51:13 +0800 | [diff] [blame] | 310 | DEFINE_RES_IRQ_NAMED(IRQ_RTC1Hz, "rtc 1Hz"), |
| 311 | DEFINE_RES_IRQ_NAMED(IRQ_RTCAlrm, "rtc alarm"), |
| 312 | }; |
| 313 | |
Richard Purdie | e842f1c | 2006-03-27 01:16:46 -0800 | [diff] [blame] | 314 | static struct platform_device sa11x0rtc_device = { |
| 315 | .name = "sa1100-rtc", |
| 316 | .id = -1, |
Haojian Zhuang | 3888c09 | 2012-02-21 11:51:13 +0800 | [diff] [blame] | 317 | .num_resources = ARRAY_SIZE(sa1100_rtc_resources), |
| 318 | .resource = sa1100_rtc_resources, |
Richard Purdie | e842f1c | 2006-03-27 01:16:46 -0800 | [diff] [blame] | 319 | }; |
| 320 | |
Russell King | 7931d92 | 2012-01-09 21:45:51 +0000 | [diff] [blame] | 321 | static struct resource sa11x0dma_resources[] = { |
Russell King | c213201 | 2012-01-14 16:57:02 +0000 | [diff] [blame] | 322 | DEFINE_RES_MEM(DMA_PHYS, DMA_SIZE), |
Russell King | 7931d92 | 2012-01-09 21:45:51 +0000 | [diff] [blame] | 323 | DEFINE_RES_IRQ(IRQ_DMA0), |
| 324 | DEFINE_RES_IRQ(IRQ_DMA1), |
| 325 | DEFINE_RES_IRQ(IRQ_DMA2), |
| 326 | DEFINE_RES_IRQ(IRQ_DMA3), |
| 327 | DEFINE_RES_IRQ(IRQ_DMA4), |
| 328 | DEFINE_RES_IRQ(IRQ_DMA5), |
| 329 | }; |
| 330 | |
| 331 | static u64 sa11x0dma_dma_mask = DMA_BIT_MASK(32); |
| 332 | |
| 333 | static struct platform_device sa11x0dma_device = { |
| 334 | .name = "sa11x0-dma", |
| 335 | .id = -1, |
| 336 | .dev = { |
| 337 | .dma_mask = &sa11x0dma_dma_mask, |
| 338 | .coherent_dma_mask = 0xffffffff, |
| 339 | }, |
| 340 | .num_resources = ARRAY_SIZE(sa11x0dma_resources), |
| 341 | .resource = sa11x0dma_resources, |
| 342 | }; |
| 343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | static struct platform_device *sa11x0_devices[] __initdata = { |
| 345 | &sa11x0udc_device, |
| 346 | &sa11x0uart1_device, |
| 347 | &sa11x0uart3_device, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | &sa11x0ssp_device, |
| 349 | &sa11x0pcmcia_device, |
Richard Purdie | e842f1c | 2006-03-27 01:16:46 -0800 | [diff] [blame] | 350 | &sa11x0rtc_device, |
Russell King | 7931d92 | 2012-01-09 21:45:51 +0000 | [diff] [blame] | 351 | &sa11x0dma_device, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | }; |
| 353 | |
| 354 | static int __init sa1100_init(void) |
| 355 | { |
| 356 | pm_power_off = sa1100_power_off; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices)); |
| 358 | } |
| 359 | |
| 360 | arch_initcall(sa1100_init); |
| 361 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
| 363 | /* |
| 364 | * Common I/O mapping: |
| 365 | * |
| 366 | * Typically, static virtual address mappings are as follow: |
| 367 | * |
| 368 | * 0xf0000000-0xf3ffffff: miscellaneous stuff (CPLDs, etc.) |
| 369 | * 0xf4000000-0xf4ffffff: SA-1111 |
| 370 | * 0xf5000000-0xf5ffffff: reserved (used by cache flushing area) |
| 371 | * 0xf6000000-0xfffeffff: reserved (internal SA1100 IO defined above) |
| 372 | * 0xffff0000-0xffff0fff: SA1100 exception vectors |
| 373 | * 0xffff2000-0xffff2fff: Minicache copy_user_page area |
| 374 | * |
| 375 | * Below 0xe8000000 is reserved for vm allocation. |
| 376 | * |
| 377 | * The machine specific code must provide the extra mapping beside the |
| 378 | * default mapping provided here. |
| 379 | */ |
| 380 | |
| 381 | static struct map_desc standard_io_desc[] __initdata = { |
Kristoffer Ericson | bda0308 | 2008-09-29 17:09:10 +0100 | [diff] [blame] | 382 | { /* PCM */ |
Deepak Saxena | 92519d8 | 2005-10-28 15:19:04 +0100 | [diff] [blame] | 383 | .virtual = 0xf8000000, |
| 384 | .pfn = __phys_to_pfn(0x80000000), |
| 385 | .length = 0x00100000, |
| 386 | .type = MT_DEVICE |
| 387 | }, { /* SCM */ |
| 388 | .virtual = 0xfa000000, |
| 389 | .pfn = __phys_to_pfn(0x90000000), |
| 390 | .length = 0x00100000, |
| 391 | .type = MT_DEVICE |
| 392 | }, { /* MER */ |
| 393 | .virtual = 0xfc000000, |
| 394 | .pfn = __phys_to_pfn(0xa0000000), |
| 395 | .length = 0x00100000, |
| 396 | .type = MT_DEVICE |
| 397 | }, { /* LCD + DMA */ |
| 398 | .virtual = 0xfe000000, |
| 399 | .pfn = __phys_to_pfn(0xb0000000), |
| 400 | .length = 0x00200000, |
| 401 | .type = MT_DEVICE |
| 402 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | }; |
| 404 | |
| 405 | void __init sa1100_map_io(void) |
| 406 | { |
| 407 | iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc)); |
| 408 | } |
| 409 | |
| 410 | /* |
| 411 | * Disable the memory bus request/grant signals on the SA1110 to |
| 412 | * ensure that we don't receive spurious memory requests. We set |
| 413 | * the MBGNT signal false to ensure the SA1111 doesn't own the |
| 414 | * SDRAM bus. |
| 415 | */ |
Russell King | 80ea206 | 2012-02-03 18:16:45 +0000 | [diff] [blame] | 416 | void sa1110_mb_disable(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | { |
| 418 | unsigned long flags; |
| 419 | |
| 420 | local_irq_save(flags); |
| 421 | |
| 422 | PGSR &= ~GPIO_MBGNT; |
| 423 | GPCR = GPIO_MBGNT; |
| 424 | GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT; |
| 425 | |
| 426 | GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ); |
| 427 | |
| 428 | local_irq_restore(flags); |
| 429 | } |
| 430 | |
| 431 | /* |
| 432 | * If the system is going to use the SA-1111 DMA engines, set up |
| 433 | * the memory bus request/grant pins. |
| 434 | */ |
Russell King | 80ea206 | 2012-02-03 18:16:45 +0000 | [diff] [blame] | 435 | void sa1110_mb_enable(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | { |
| 437 | unsigned long flags; |
| 438 | |
| 439 | local_irq_save(flags); |
| 440 | |
| 441 | PGSR &= ~GPIO_MBGNT; |
| 442 | GPCR = GPIO_MBGNT; |
| 443 | GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT; |
| 444 | |
| 445 | GAFR |= (GPIO_MBGNT | GPIO_MBREQ); |
| 446 | TUCR |= TUCR_MR; |
| 447 | |
| 448 | local_irq_restore(flags); |
| 449 | } |
| 450 | |