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