kernel/linux/arch/arm/mach-sa1100/graphicsmaster.c

   1 /*
   2  * linux/arch/arm/mach-sa1100/graphicsmaster.c
   3  *
   4  * Pieces specific to the GraphicsMaster board
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #include <linux/kernel.h>
  11 #include <linux/init.h>
  12 #include <linux/ptrace.h>
  13 #include <linux/ioport.h>
  14
  15 #include <asm/hardware.h>
  16 #include <asm/mach-types.h>
  17 #include <asm/setup.h>
  18 #include <asm/irq.h>
  19
  20 #include <asm/mach/irq.h>
  21 #include <asm/mach/arch.h>
  22 #include <asm/mach/map.h>
  23 #include <asm/mach/serial_sa1100.h>
  24
  25 #include "generic.h"
  26
  27 static struct resource sa1111_resources[] = {
  28         [0] = {
  29                 .start          = 0x18000000,
  30                 .end            = 0x18001fff,
  31                 .flags          = IORESOURCE_MEM,
  32         },
  33         [1] = {
  34                 .start          = ADS_EXT_IRQ(0),
  35                 .end            = ADS_EXT_IRQ(0),
  36                 .flags          = IORESOURCE_IRQ,
  37         },
  38 };
  39
  40 static u64 sa1111_dmamask = 0xffffffffUL;
  41
  42 static struct platform_device sa1111_device = {
  43         .name           = "sa1111",
  44         .id             = 0,
  45         .dev            = {
  46                 .dma_mask = &sa1111_dmamask,
  47                 .coherent_dma_mask = 0xffffffff,
  48         },
  49         .num_resources  = ARRAY_SIZE(sa1111_resources),
  50         .resource       = sa1111_resources,
  51 };
  52
  53 static struct platform_device *devices[] __initdata = {
  54         &sa1111_device,
  55 };
  56
  57 static int __init graphicsmaster_init(void)
  58 {
  59         int ret;
  60
  61         if (!machine_is_graphicsmaster())
  62                 return -ENODEV;
  63
  64         /*
  65          * Ensure that the memory bus request/grant signals are setup,
  66          * and the grant is held in its inactive state
  67          */
  68         sa1110_mb_disable();
  69
  70         /*
  71          * Probe for SA1111.
  72          */
  73         ret = platform_add_devices(devices, ARRAY_SIZE(devices));
  74         if (ret < 0)
  75                 return ret;
  76
  77         /*
  78          * Enable PWM control for LCD
  79          */
  80         sa1111_enable_device(SKPCR_PWMCLKEN);
  81         SKPWM0 = 0x7F;                          // VEE
  82         SKPEN0 = 1;
  83         SKPWM1 = 0x01;                          // Backlight
  84         SKPEN1 = 1;
  85
  86         return 0;
  87 }
  88
  89 arch_initcall(graphicsmaster_init);
  90
  91 /*
  92  * Handlers for GraphicsMaster's external IRQ logic
  93  */
  94
  95 static void
  96 gm_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
  97 {
  98         unsigned int mask;
  99
 100         while ((mask = ADS_INT_ST1 | (ADS_INT_ST2 << 8))) {
 101                 /* clear the parent IRQ */
 102                 GEDR = GPIO_GPIO0;
 103
 104                 irq = ADS_EXT_IRQ(0);
 105                 desc = irq_desc + irq;
 106
 107                 do {
 108                         if (mask & 1)
 109                                 desc->handle(irq, desc, regs);
 110                         mask >>= 1;
 111                         irq++;
 112                         desc++;
 113                 } while (mask);
 114         }
 115 }
 116
 117 static void gm_mask_irq1(unsigned int irq)
 118 {
 119         int mask = (1 << (irq - ADS_EXT_IRQ(0)));
 120         ADS_INT_EN1 &= ~mask;
 121         ADS_INT_ST1 = mask;
 122 }
 123
 124 static void gm_unmask_irq1(unsigned int irq)
 125 {
 126         ADS_INT_EN1 |= (1 << (irq - ADS_EXT_IRQ(0)));
 127 }
 128
 129 static struct irqchip gm_irq1_chip = {
 130         .ack    = gm_mask_irq1,
 131         .mask   = gm_mask_irq1,
 132         .unmask = gm_unmask_irq1,
 133 };
 134
 135 static void gm_mask_irq2(unsigned int irq)
 136 {
 137         int mask = (1 << (irq - ADS_EXT_IRQ(8)));
 138         ADS_INT_EN2 &= ~mask;
 139         ADS_INT_ST2 = mask;
 140 }
 141
 142 static void gm_unmask_irq2(unsigned int irq)
 143 {
 144         ADS_INT_EN2 |= (1 << (irq - ADS_EXT_IRQ(8)));
 145 }
 146
 147 static struct irqchip gm_irq2_chip = {
 148         .ack    = gm_mask_irq2,
 149         .mask   = gm_mask_irq2,
 150         .unmask = gm_unmask_irq2,
 151 };
 152
 153 static void __init graphicsmaster_init_irq(void)
 154 {
 155         unsigned int irq;
 156
 157         /* First the standard SA1100 IRQs */
 158         sa1100_init_irq();
 159
 160         /* disable all IRQs */
 161         ADS_INT_EN1 = 0;
 162         ADS_INT_EN2 = 0;
 163
 164         /* clear all IRQs */
 165         ADS_INT_ST1 = 0xff;
 166         ADS_INT_ST2 = 0xff;
 167
 168         for (irq = ADS_EXT_IRQ(0); irq <= ADS_EXT_IRQ(7); irq++) {
 169                 set_irq_chip(irq, &gm_irq1_chip);
 170                 set_irq_handler(irq, do_level_IRQ);
 171                 set_irq_flags(irq, IRQF_PROBE | IRQF_VALID);
 172         }
 173         for (irq = ADS_EXT_IRQ(8); irq <= ADS_EXT_IRQ(15); irq++) {
 174                 set_irq_chip(irq, &gm_irq2_chip);
 175                 set_irq_handler(irq, do_level_IRQ);
 176                 set_irq_flags(irq, IRQF_PROBE | IRQF_VALID);
 177         }
 178         set_irq_type(IRQ_GPIO0, IRQT_FALLING);
 179         set_irq_chained_handler(IRQ_GPIO0, gm_irq_handler);
 180 }
 181
 182
 183 static struct map_desc graphicsmaster_io_desc[] __initdata = {
 184  /* virtual     physical    length      type */
 185   { 0xf0000000, 0x10000000, 0x00400000, MT_DEVICE }, /* CPLD */
 186   { 0xf1000000, 0x40000000, 0x00400000, MT_DEVICE }, /* CAN */
 187   { 0xf4000000, 0x18000000, 0x00800000, MT_DEVICE }  /* SA-1111 */
 188 };
 189
 190 #error Old code.  Someone needs to decide what to do about this.
 191 #if 0
 192 static int graphicsmaster_uart_open(struct uart_port *port, struct uart_info *info)
 193 {
 194         int     ret = 0;
 195
 196         if (port->mapbase == _Ser1UTCR0) {
 197                 Ser1SDCR0 |= SDCR0_UART;
 198                 /* Set RTS Output */
 199                 GPSR = GPIO_GPIO15;
 200         }
 201         else if (port->mapbase == _Ser2UTCR0) {
 202                 Ser2UTCR4 = Ser2HSCR0 = 0;
 203                 /* Set RTS Output */
 204                 GPSR = GPIO_GPIO17;
 205         }
 206         else if (port->mapbase == _Ser3UTCR0) {
 207                 /* Set RTS Output */
 208                 GPSR = GPIO_GPIO19;
 209         }
 210         return ret;
 211 }
 212 #endif
 213
 214 static u_int graphicsmaster_get_mctrl(struct uart_port *port)
 215 {
 216         u_int result = TIOCM_CD | TIOCM_DSR;
 217
 218         if (port->mapbase == _Ser1UTCR0) {
 219                 if (!(GPLR & GPIO_GPIO14))
 220                         result |= TIOCM_CTS;
 221         } else if (port->mapbase == _Ser2UTCR0) {
 222                 if (!(GPLR & GPIO_GPIO16))
 223                         result |= TIOCM_CTS;
 224         } else if (port->mapbase == _Ser3UTCR0) {
 225                 if (!(GPLR & GPIO_GPIO17))
 226                         result |= TIOCM_CTS;
 227         } else {
 228                 result = TIOCM_CTS;
 229         }
 230
 231         return result;
 232 }
 233
 234 static void graphicsmaster_set_mctrl(struct uart_port *port, u_int mctrl)
 235 {
 236         if (port->mapbase == _Ser1UTCR0) {
 237                 if (mctrl & TIOCM_RTS)
 238                         GPCR = GPIO_GPIO15;
 239                 else
 240                         GPSR = GPIO_GPIO15;
 241         } else if (port->mapbase == _Ser2UTCR0) {
 242                 if (mctrl & TIOCM_RTS)
 243                         GPCR = GPIO_GPIO17;
 244                 else
 245                         GPSR = GPIO_GPIO17;
 246         } else if (port->mapbase == _Ser3UTCR0) {
 247                 if (mctrl & TIOCM_RTS)
 248                         GPCR = GPIO_GPIO19;
 249                 else
 250                         GPSR = GPIO_GPIO19;
 251         }
 252 }
 253
 254 static void
 255 graphicsmaster_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
 256 {
 257         if (!state) {
 258                 /* make serial ports work ... */
 259                 Ser2UTCR4 = 0;
 260                 Ser2HSCR0 = 0;
 261                 Ser1SDCR0 |= SDCR0_UART;
 262         }
 263 }
 264
 265 static struct sa1100_port_fns graphicsmaster_port_fns __initdata = {
 266         .get_mctrl      = graphicsmaster_get_mctrl,
 267         .set_mctrl      = graphicsmaster_set_mctrl,
 268         .pm             = graphicsmaster_uart_pm,
 269 };
 270
 271 static void __init graphicsmaster_map_io(void)
 272 {
 273         sa1100_map_io();
 274         iotable_init(graphicsmaster_io_desc, ARRAY_SIZE(graphicsmaster_io_desc));
 275
 276         sa1100_register_uart_fns(&graphicsmaster_port_fns);
 277         sa1100_register_uart(0, 3);
 278         sa1100_register_uart(1, 1);
 279         sa1100_register_uart(2, 2);
 280
 281         /* set GPDR now */
 282         GPDR |= GPIO_GPIO15 | GPIO_GPIO17 | GPIO_GPIO19;
 283         GPDR &= ~(GPIO_GPIO14 | GPIO_GPIO16 | GPIO_GPIO18);
 284 }
 285
 286 MACHINE_START(GRAPHICSMASTER, "ADS GraphicsMaster")
 287         BOOT_MEM(0xc0000000, 0x80000000, 0xf8000000)
 288         MAPIO(graphicsmaster_map_io)
 289         INITIRQ(graphicsmaster_init_irq)
 290         INITTIME(sa1100_init_time)
 291 MACHINE_END