arch/arm/mach-pxa/lubbock.c

   1 /*
   2  *  linux/arch/arm/mach-pxa/lubbock.c
   3  *
   4  *  Support for the Intel DBPXA250 Development Platform.
   5  *
   6  *  Author:     Nicolas Pitre
   7  *  Created:    Jun 15, 2001
   8  *  Copyright:  MontaVista Software Inc.
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License version 2 as
  12  *  published by the Free Software Foundation.
  13  */
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/device.h>
  17 #include <linux/major.h>
  18 #include <linux/fs.h>
  19 #include <linux/interrupt.h>
  20
  21 #include <asm/setup.h>
  22 #include <asm/memory.h>
  23 #include <asm/mach-types.h>
  24 #include <asm/hardware.h>
  25 #include <asm/irq.h>
  26
  27 #include <asm/mach/arch.h>
  28 #include <asm/mach/map.h>
  29 #include <asm/mach/irq.h>
  30
  31 #include <asm/arch/udc.h>
  32 #include <asm/hardware/sa1111.h>
  33
  34 #include "generic.h"
  35
  36
  37 static unsigned long lubbock_irq_enabled;
  38
  39 static void lubbock_mask_irq(unsigned int irq)
  40 {
  41         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
  42         LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
  43 }
  44
  45 static void lubbock_unmask_irq(unsigned int irq)
  46 {
  47         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
  48         /* the irq can be acknowledged only if deasserted, so it's done here */
  49         LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
  50         LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
  51 }
  52
  53 static struct irqchip lubbock_irq_chip = {
  54         .ack            = lubbock_mask_irq,
  55         .mask           = lubbock_mask_irq,
  56         .unmask         = lubbock_unmask_irq,
  57 };
  58
  59 static void lubbock_irq_handler(unsigned int irq, struct irqdesc *desc,
  60                                 struct pt_regs *regs)
  61 {
  62         unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
  63         do {
  64                 GEDR(0) = GPIO_bit(0);  /* clear our parent irq */
  65                 if (likely(pending)) {
  66                         irq = LUBBOCK_IRQ(0) + __ffs(pending);
  67                         desc = irq_desc + irq;
  68                         desc->handle(irq, desc, regs);
  69                 }
  70                 pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
  71         } while (pending);
  72 }
  73
  74 static void __init lubbock_init_irq(void)
  75 {
  76         int irq;
  77
  78         pxa_init_irq();
  79
  80         /* setup extra lubbock irqs */
  81         for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
  82                 set_irq_chip(irq, &lubbock_irq_chip);
  83                 set_irq_handler(irq, do_level_IRQ);
  84                 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
  85         }
  86
  87         set_irq_chained_handler(IRQ_GPIO(0), lubbock_irq_handler);
  88         set_irq_type(IRQ_GPIO(0), IRQT_FALLING);
  89 }
  90
  91 static int lubbock_udc_is_connected(void)
  92 {
  93         return (LUB_MISC_RD & (1 << 9)) == 0;
  94 }
  95
  96 static struct pxa2xx_udc_mach_info udc_info __initdata = {
  97         .udc_is_connected       = lubbock_udc_is_connected,
  98         // no D+ pullup; lubbock can't connect/disconnect in software
  99 };
 100
 101 static struct resource sa1111_resources[] = {
 102         [0] = {
 103                 .start  = 0x10000000,
 104                 .end    = 0x10001fff,
 105                 .flags  = IORESOURCE_MEM,
 106         },
 107         [1] = {
 108                 .start  = LUBBOCK_SA1111_IRQ,
 109                 .end    = LUBBOCK_SA1111_IRQ,
 110                 .flags  = IORESOURCE_IRQ,
 111         },
 112 };
 113
 114 static struct platform_device sa1111_device = {
 115         .name           = "sa1111",
 116         .id             = 0,
 117         .num_resources  = ARRAY_SIZE(sa1111_resources),
 118         .resource       = sa1111_resources,
 119 };
 120
 121 static struct resource smc91x_resources[] = {
 122         [0] = {
 123                 .start  = 0x0c000000,
 124                 .end    = 0x0c0fffff,
 125                 .flags  = IORESOURCE_MEM,
 126         },
 127         [1] = {
 128                 .start  = LUBBOCK_ETH_IRQ,
 129                 .end    = LUBBOCK_ETH_IRQ,
 130                 .flags  = IORESOURCE_IRQ,
 131         },
 132         [2] = {
 133                 .start  = 0x0e000000,
 134                 .end    = 0x0e0fffff,
 135                 .flags  = IORESOURCE_MEM,
 136         },
 137 };
 138
 139 static struct platform_device smc91x_device = {
 140         .name           = "smc91x",
 141         .id             = 0,
 142         .num_resources  = ARRAY_SIZE(smc91x_resources),
 143         .resource       = smc91x_resources,
 144 };
 145
 146 static struct platform_device *devices[] __initdata = {
 147         &sa1111_device,
 148         &smc91x_device,
 149 };
 150
 151 static void __init lubbock_init(void)
 152 {
 153         pxa_set_udc_info(&udc_info);
 154         (void) platform_add_devices(devices, ARRAY_SIZE(devices));
 155 }
 156
 157 static struct map_desc lubbock_io_desc[] __initdata = {
 158   { LUBBOCK_FPGA_VIRT, LUBBOCK_FPGA_PHYS, 0x00100000, MT_DEVICE }, /* CPLD */
 159 };
 160
 161 static void __init lubbock_map_io(void)
 162 {
 163         pxa_map_io();
 164         iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
 165
 166         /* This enables the BTUART */
 167         pxa_gpio_mode(GPIO42_BTRXD_MD);
 168         pxa_gpio_mode(GPIO43_BTTXD_MD);
 169         pxa_gpio_mode(GPIO44_BTCTS_MD);
 170         pxa_gpio_mode(GPIO45_BTRTS_MD);
 171
 172         /* This is for the SMC chip select */
 173         pxa_gpio_mode(GPIO79_nCS_3_MD);
 174
 175         /* setup sleep mode values */
 176         PWER  = 0x00000002;
 177         PFER  = 0x00000000;
 178         PRER  = 0x00000002;
 179         PGSR0 = 0x00008000;
 180         PGSR1 = 0x003F0202;
 181         PGSR2 = 0x0001C000;
 182         PCFR |= PCFR_OPDE;
 183 }
 184
 185 MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
 186         MAINTAINER("MontaVista Software Inc.")
 187         BOOT_MEM(0xa0000000, 0x40000000, io_p2v(0x40000000))
 188         MAPIO(lubbock_map_io)
 189         INITIRQ(lubbock_init_irq)
 190         INIT_MACHINE(lubbock_init)
 191 MACHINE_END