arch/arm/mach-iop32x/iq31244.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * arch/arm/mach-iop32x/iq31244.c
   4  *
   5  * Board support code for the Intel EP80219 and IQ31244 platforms.
   6  *
   7  * Author: Rory Bolt <rorybolt@pacbell.net>
   8  * Copyright (C) 2002 Rory Bolt
   9  * Copyright 2003 (c) MontaVista, Software, Inc.
  10  * Copyright (C) 2004 Intel Corp.
  11  */
  12
  13 #include <linux/mm.h>
  14 #include <linux/init.h>
  15 #include <linux/delay.h>
  16 #include <linux/kernel.h>
  17 #include <linux/pci.h>
  18 #include <linux/pm.h>
  19 #include <linux/string.h>
  20 #include <linux/serial_core.h>
  21 #include <linux/serial_8250.h>
  22 #include <linux/mtd/physmap.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/io.h>
  25 #include <linux/gpio/machine.h>
  26 #include <asm/cputype.h>
  27 #include <asm/irq.h>
  28 #include <asm/mach/arch.h>
  29 #include <asm/mach/map.h>
  30 #include <asm/mach/pci.h>
  31 #include <asm/mach/time.h>
  32 #include <asm/mach-types.h>
  33 #include <asm/page.h>
  34
  35 #include "hardware.h"
  36 #include "irqs.h"
  37 #include "gpio-iop32x.h"
  38
  39 /*
  40  * Until March of 2007 iq31244 platforms and ep80219 platforms shared the
  41  * same machine id, and the processor type was used to select board type.
  42  * However this assumption breaks for an iq80219 board which is an iop219
  43  * processor on an iq31244 board.  The force_ep80219 flag has been added
  44  * for old boot loaders using the iq31244 machine id for an ep80219 platform.
  45  */
  46 static int force_ep80219;
  47
  48 static int is_80219(void)
  49 {
  50         return !!((read_cpuid_id() & 0xffffffe0) == 0x69052e20);
  51 }
  52
  53 static int is_ep80219(void)
  54 {
  55         if (machine_is_ep80219() || force_ep80219)
  56                 return 1;
  57         else
  58                 return 0;
  59 }
  60
  61
  62 /*
  63  * EP80219/IQ31244 timer tick configuration.
  64  */
  65 static void __init iq31244_timer_init(void)
  66 {
  67         if (is_ep80219()) {
  68                 /* 33.333 MHz crystal.  */
  69                 iop_init_time(200000000);
  70         } else {
  71                 /* 33.000 MHz crystal.  */
  72                 iop_init_time(198000000);
  73         }
  74 }
  75
  76
  77 /*
  78  * IQ31244 I/O.
  79  */
  80 static struct map_desc iq31244_io_desc[] __initdata = {
  81         {       /* on-board devices */
  82                 .virtual        = IQ31244_UART,
  83                 .pfn            = __phys_to_pfn(IQ31244_UART),
  84                 .length         = 0x00100000,
  85                 .type           = MT_DEVICE,
  86         },
  87 };
  88
  89 void __init iq31244_map_io(void)
  90 {
  91         iop3xx_map_io();
  92         iotable_init(iq31244_io_desc, ARRAY_SIZE(iq31244_io_desc));
  93 }
  94
  95
  96 /*
  97  * EP80219/IQ31244 PCI.
  98  */
  99 static int __init
 100 ep80219_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 101 {
 102         int irq;
 103
 104         if (slot == 0) {
 105                 /* CFlash */
 106                 irq = IRQ_IOP32X_XINT1;
 107         } else if (slot == 1) {
 108                 /* 82551 Pro 100 */
 109                 irq = IRQ_IOP32X_XINT0;
 110         } else if (slot == 2) {
 111                 /* PCI-X Slot */
 112                 irq = IRQ_IOP32X_XINT3;
 113         } else if (slot == 3) {
 114                 /* SATA */
 115                 irq = IRQ_IOP32X_XINT2;
 116         } else {
 117                 printk(KERN_ERR "ep80219_pci_map_irq() called for unknown "
 118                         "device PCI:%d:%d:%d\n", dev->bus->number,
 119                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 120                 irq = -1;
 121         }
 122
 123         return irq;
 124 }
 125
 126 static struct hw_pci ep80219_pci __initdata = {
 127         .nr_controllers = 1,
 128         .ops            = &iop3xx_ops,
 129         .setup          = iop3xx_pci_setup,
 130         .preinit        = iop3xx_pci_preinit,
 131         .map_irq        = ep80219_pci_map_irq,
 132 };
 133
 134 static int __init
 135 iq31244_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 136 {
 137         int irq;
 138
 139         if (slot == 0) {
 140                 /* CFlash */
 141                 irq = IRQ_IOP32X_XINT1;
 142         } else if (slot == 1) {
 143                 /* SATA */
 144                 irq = IRQ_IOP32X_XINT2;
 145         } else if (slot == 2) {
 146                 /* PCI-X Slot */
 147                 irq = IRQ_IOP32X_XINT3;
 148         } else if (slot == 3) {
 149                 /* 82546 GigE */
 150                 irq = IRQ_IOP32X_XINT0;
 151         } else {
 152                 printk(KERN_ERR "iq31244_pci_map_irq called for unknown "
 153                         "device PCI:%d:%d:%d\n", dev->bus->number,
 154                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 155                 irq = -1;
 156         }
 157
 158         return irq;
 159 }
 160
 161 static struct hw_pci iq31244_pci __initdata = {
 162         .nr_controllers = 1,
 163         .ops            = &iop3xx_ops,
 164         .setup          = iop3xx_pci_setup,
 165         .preinit        = iop3xx_pci_preinit,
 166         .map_irq        = iq31244_pci_map_irq,
 167 };
 168
 169 static int __init iq31244_pci_init(void)
 170 {
 171         if (is_ep80219())
 172                 pci_common_init(&ep80219_pci);
 173         else if (machine_is_iq31244()) {
 174                 if (is_80219()) {
 175                         printk("note: iq31244 board type has been selected\n");
 176                         printk("note: to select ep80219 operation:\n");
 177                         printk("\t1/ specify \"force_ep80219\" on the kernel"
 178                                 " command line\n");
 179                         printk("\t2/ update boot loader to pass"
 180                                 " the ep80219 id: %d\n", MACH_TYPE_EP80219);
 181                 }
 182                 pci_common_init(&iq31244_pci);
 183         }
 184
 185         return 0;
 186 }
 187
 188 subsys_initcall(iq31244_pci_init);
 189
 190
 191 /*
 192  * IQ31244 machine initialisation.
 193  */
 194 static struct physmap_flash_data iq31244_flash_data = {
 195         .width          = 2,
 196 };
 197
 198 static struct resource iq31244_flash_resource = {
 199         .start          = 0xf0000000,
 200         .end            = 0xf07fffff,
 201         .flags          = IORESOURCE_MEM,
 202 };
 203
 204 static struct platform_device iq31244_flash_device = {
 205         .name           = "physmap-flash",
 206         .id             = 0,
 207         .dev            = {
 208                 .platform_data  = &iq31244_flash_data,
 209         },
 210         .num_resources  = 1,
 211         .resource       = &iq31244_flash_resource,
 212 };
 213
 214 static struct plat_serial8250_port iq31244_serial_port[] = {
 215         {
 216                 .mapbase        = IQ31244_UART,
 217                 .membase        = (char *)IQ31244_UART,
 218                 .irq            = IRQ_IOP32X_XINT1,
 219                 .flags          = UPF_SKIP_TEST,
 220                 .iotype         = UPIO_MEM,
 221                 .regshift       = 0,
 222                 .uartclk        = 1843200,
 223         },
 224         { },
 225 };
 226
 227 static struct resource iq31244_uart_resource = {
 228         .start          = IQ31244_UART,
 229         .end            = IQ31244_UART + 7,
 230         .flags          = IORESOURCE_MEM,
 231 };
 232
 233 static struct platform_device iq31244_serial_device = {
 234         .name           = "serial8250",
 235         .id             = PLAT8250_DEV_PLATFORM,
 236         .dev            = {
 237                 .platform_data          = iq31244_serial_port,
 238         },
 239         .num_resources  = 1,
 240         .resource       = &iq31244_uart_resource,
 241 };
 242
 243 /*
 244  * This function will send a SHUTDOWN_COMPLETE message to the PIC
 245  * controller over I2C.  We are not using the i2c subsystem since
 246  * we are going to power off and it may be removed
 247  */
 248 void ep80219_power_off(void)
 249 {
 250         /*
 251          * Send the Address byte w/ the start condition
 252          */
 253         *IOP3XX_IDBR1 = 0x60;
 254         *IOP3XX_ICR1 = 0xE9;
 255         mdelay(1);
 256
 257         /*
 258          * Send the START_MSG byte w/ no start or stop condition
 259          */
 260         *IOP3XX_IDBR1 = 0x0F;
 261         *IOP3XX_ICR1 = 0xE8;
 262         mdelay(1);
 263
 264         /*
 265          * Send the SHUTDOWN_COMPLETE Message ID byte w/ no start or
 266          * stop condition
 267          */
 268         *IOP3XX_IDBR1 = 0x03;
 269         *IOP3XX_ICR1 = 0xE8;
 270         mdelay(1);
 271
 272         /*
 273          * Send an ignored byte w/ stop condition
 274          */
 275         *IOP3XX_IDBR1 = 0x00;
 276         *IOP3XX_ICR1 = 0xEA;
 277
 278         while (1)
 279                 ;
 280 }
 281
 282 static void __init iq31244_init_machine(void)
 283 {
 284         register_iop32x_gpio();
 285         gpiod_add_lookup_table(&iop3xx_i2c0_gpio_lookup);
 286         gpiod_add_lookup_table(&iop3xx_i2c1_gpio_lookup);
 287         platform_device_register(&iop3xx_i2c0_device);
 288         platform_device_register(&iop3xx_i2c1_device);
 289         platform_device_register(&iq31244_flash_device);
 290         platform_device_register(&iq31244_serial_device);
 291         platform_device_register(&iop3xx_dma_0_channel);
 292         platform_device_register(&iop3xx_dma_1_channel);
 293
 294         if (is_ep80219())
 295                 pm_power_off = ep80219_power_off;
 296
 297         if (!is_80219())
 298                 platform_device_register(&iop3xx_aau_channel);
 299 }
 300
 301 static int __init force_ep80219_setup(char *str)
 302 {
 303         force_ep80219 = 1;
 304         return 1;
 305 }
 306
 307 __setup("force_ep80219", force_ep80219_setup);
 308
 309 MACHINE_START(IQ31244, "Intel IQ31244")
 310         /* Maintainer: Intel Corp. */
 311         .atag_offset    = 0x100,
 312         .map_io         = iq31244_map_io,
 313         .init_irq       = iop32x_init_irq,
 314         .init_time      = iq31244_timer_init,
 315         .init_machine   = iq31244_init_machine,
 316         .restart        = iop3xx_restart,
 317 MACHINE_END
 318
 319 /* There should have been an ep80219 machine identifier from the beginning.
 320  * Boot roms older than March 2007 do not know the ep80219 machine id.  Pass
 321  * "force_ep80219" on the kernel command line, otherwise iq31244 operation
 322  * will be selected.
 323  */
 324 MACHINE_START(EP80219, "Intel EP80219")
 325         /* Maintainer: Intel Corp. */
 326         .atag_offset    = 0x100,
 327         .map_io         = iq31244_map_io,
 328         .init_irq       = iop32x_init_irq,
 329         .init_time      = iq31244_timer_init,
 330         .init_machine   = iq31244_init_machine,
 331         .restart        = iop3xx_restart,
 332 MACHINE_END