arch/m68k/platform/523x/config.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      linux/arch/m68knommu/platform/523x/config.c
   5  *
   6  *      Sub-architcture dependant initialization code for the Freescale
   7  *      523x CPUs.
   8  *
   9  *      Copyright (C) 1999-2005, Greg Ungerer (gerg@snapgear.com)
  10  *      Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
  11  */
  12
  13 /***************************************************************************/
  14
  15 #include <linux/kernel.h>
  16 #include <linux/param.h>
  17 #include <linux/init.h>
  18 #include <linux/io.h>
  19 #include <linux/spi/spi.h>
  20 #include <linux/gpio.h>
  21 #include <asm/machdep.h>
  22 #include <asm/coldfire.h>
  23 #include <asm/mcfsim.h>
  24 #include <asm/mcfuart.h>
  25 #include <asm/mcfqspi.h>
  26
  27 /***************************************************************************/
  28
  29 static struct mcf_platform_uart m523x_uart_platform[] = {
  30         {
  31                 .mapbase        = MCFUART_BASE1,
  32                 .irq            = MCFINT_VECBASE + MCFINT_UART0,
  33         },
  34         {
  35                 .mapbase        = MCFUART_BASE2,
  36                 .irq            = MCFINT_VECBASE + MCFINT_UART0 + 1,
  37         },
  38         {
  39                 .mapbase        = MCFUART_BASE3,
  40                 .irq            = MCFINT_VECBASE + MCFINT_UART0 + 2,
  41         },
  42         { },
  43 };
  44
  45 static struct platform_device m523x_uart = {
  46         .name                   = "mcfuart",
  47         .id                     = 0,
  48         .dev.platform_data      = m523x_uart_platform,
  49 };
  50
  51 static struct resource m523x_fec_resources[] = {
  52         {
  53                 .start          = MCFFEC_BASE,
  54                 .end            = MCFFEC_BASE + MCFFEC_SIZE - 1,
  55                 .flags          = IORESOURCE_MEM,
  56         },
  57         {
  58                 .start          = 64 + 23,
  59                 .end            = 64 + 23,
  60                 .flags          = IORESOURCE_IRQ,
  61         },
  62         {
  63                 .start          = 64 + 27,
  64                 .end            = 64 + 27,
  65                 .flags          = IORESOURCE_IRQ,
  66         },
  67         {
  68                 .start          = 64 + 29,
  69                 .end            = 64 + 29,
  70                 .flags          = IORESOURCE_IRQ,
  71         },
  72 };
  73
  74 static struct platform_device m523x_fec = {
  75         .name                   = "fec",
  76         .id                     = 0,
  77         .num_resources          = ARRAY_SIZE(m523x_fec_resources),
  78         .resource               = m523x_fec_resources,
  79 };
  80
  81 #if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
  82 static struct resource m523x_qspi_resources[] = {
  83         {
  84                 .start          = MCFQSPI_IOBASE,
  85                 .end            = MCFQSPI_IOBASE + MCFQSPI_IOSIZE - 1,
  86                 .flags          = IORESOURCE_MEM,
  87         },
  88         {
  89                 .start          = MCFINT_VECBASE + MCFINT_QSPI,
  90                 .end            = MCFINT_VECBASE + MCFINT_QSPI,
  91                 .flags          = IORESOURCE_IRQ,
  92         },
  93 };
  94
  95 #define MCFQSPI_CS0    91
  96 #define MCFQSPI_CS1    92
  97 #define MCFQSPI_CS2    103
  98 #define MCFQSPI_CS3    99
  99
 100 static int m523x_cs_setup(struct mcfqspi_cs_control *cs_control)
 101 {
 102         int status;
 103
 104         status = gpio_request(MCFQSPI_CS0, "MCFQSPI_CS0");
 105         if (status) {
 106                 pr_debug("gpio_request for MCFQSPI_CS0 failed\n");
 107                 goto fail0;
 108         }
 109         status = gpio_direction_output(MCFQSPI_CS0, 1);
 110         if (status) {
 111                 pr_debug("gpio_direction_output for MCFQSPI_CS0 failed\n");
 112                 goto fail1;
 113         }
 114
 115         status = gpio_request(MCFQSPI_CS1, "MCFQSPI_CS1");
 116         if (status) {
 117                 pr_debug("gpio_request for MCFQSPI_CS1 failed\n");
 118                 goto fail1;
 119         }
 120         status = gpio_direction_output(MCFQSPI_CS1, 1);
 121         if (status) {
 122                 pr_debug("gpio_direction_output for MCFQSPI_CS1 failed\n");
 123                 goto fail2;
 124         }
 125
 126         status = gpio_request(MCFQSPI_CS2, "MCFQSPI_CS2");
 127         if (status) {
 128                 pr_debug("gpio_request for MCFQSPI_CS2 failed\n");
 129                 goto fail2;
 130         }
 131         status = gpio_direction_output(MCFQSPI_CS2, 1);
 132         if (status) {
 133                 pr_debug("gpio_direction_output for MCFQSPI_CS2 failed\n");
 134                 goto fail3;
 135         }
 136
 137         status = gpio_request(MCFQSPI_CS3, "MCFQSPI_CS3");
 138         if (status) {
 139                 pr_debug("gpio_request for MCFQSPI_CS3 failed\n");
 140                 goto fail3;
 141         }
 142         status = gpio_direction_output(MCFQSPI_CS3, 1);
 143         if (status) {
 144                 pr_debug("gpio_direction_output for MCFQSPI_CS3 failed\n");
 145                 goto fail4;
 146         }
 147
 148         return 0;
 149
 150 fail4:
 151         gpio_free(MCFQSPI_CS3);
 152 fail3:
 153         gpio_free(MCFQSPI_CS2);
 154 fail2:
 155         gpio_free(MCFQSPI_CS1);
 156 fail1:
 157         gpio_free(MCFQSPI_CS0);
 158 fail0:
 159         return status;
 160 }
 161
 162 static void m523x_cs_teardown(struct mcfqspi_cs_control *cs_control)
 163 {
 164         gpio_free(MCFQSPI_CS3);
 165         gpio_free(MCFQSPI_CS2);
 166         gpio_free(MCFQSPI_CS1);
 167         gpio_free(MCFQSPI_CS0);
 168 }
 169
 170 static void m523x_cs_select(struct mcfqspi_cs_control *cs_control,
 171                             u8 chip_select, bool cs_high)
 172 {
 173         switch (chip_select) {
 174         case 0:
 175                 gpio_set_value(MCFQSPI_CS0, cs_high);
 176                 break;
 177         case 1:
 178                 gpio_set_value(MCFQSPI_CS1, cs_high);
 179                 break;
 180         case 2:
 181                 gpio_set_value(MCFQSPI_CS2, cs_high);
 182                 break;
 183         case 3:
 184                 gpio_set_value(MCFQSPI_CS3, cs_high);
 185                 break;
 186         }
 187 }
 188
 189 static void m523x_cs_deselect(struct mcfqspi_cs_control *cs_control,
 190                               u8 chip_select, bool cs_high)
 191 {
 192         switch (chip_select) {
 193         case 0:
 194                 gpio_set_value(MCFQSPI_CS0, !cs_high);
 195                 break;
 196         case 1:
 197                 gpio_set_value(MCFQSPI_CS1, !cs_high);
 198                 break;
 199         case 2:
 200                 gpio_set_value(MCFQSPI_CS2, !cs_high);
 201                 break;
 202         case 3:
 203                 gpio_set_value(MCFQSPI_CS3, !cs_high);
 204                 break;
 205         }
 206 }
 207
 208 static struct mcfqspi_cs_control m523x_cs_control = {
 209         .setup                  = m523x_cs_setup,
 210         .teardown               = m523x_cs_teardown,
 211         .select                 = m523x_cs_select,
 212         .deselect               = m523x_cs_deselect,
 213 };
 214
 215 static struct mcfqspi_platform_data m523x_qspi_data = {
 216         .bus_num                = 0,
 217         .num_chipselect         = 4,
 218         .cs_control             = &m523x_cs_control,
 219 };
 220
 221 static struct platform_device m523x_qspi = {
 222         .name                   = "mcfqspi",
 223         .id                     = 0,
 224         .num_resources          = ARRAY_SIZE(m523x_qspi_resources),
 225         .resource               = m523x_qspi_resources,
 226         .dev.platform_data      = &m523x_qspi_data,
 227 };
 228
 229 static void __init m523x_qspi_init(void)
 230 {
 231         u16 par;
 232
 233         /* setup QSPS pins for QSPI with gpio CS control */
 234         writeb(0x1f, MCFGPIO_PAR_QSPI);
 235         /* and CS2 & CS3 as gpio */
 236         par = readw(MCFGPIO_PAR_TIMER);
 237         par &= 0x3f3f;
 238         writew(par, MCFGPIO_PAR_TIMER);
 239 }
 240 #endif /* defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE) */
 241
 242 static struct platform_device *m523x_devices[] __initdata = {
 243         &m523x_uart,
 244         &m523x_fec,
 245 #if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
 246         &m523x_qspi,
 247 #endif
 248 };
 249
 250 /***************************************************************************/
 251
 252 static void __init m523x_fec_init(void)
 253 {
 254         u16 par;
 255         u8 v;
 256
 257         /* Set multi-function pins to ethernet use */
 258         par = readw(MCF_IPSBAR + 0x100082);
 259         writew(par | 0xf00, MCF_IPSBAR + 0x100082);
 260         v = readb(MCF_IPSBAR + 0x100078);
 261         writeb(v | 0xc0, MCF_IPSBAR + 0x100078);
 262 }
 263
 264 /***************************************************************************/
 265
 266 static void m523x_cpu_reset(void)
 267 {
 268         local_irq_disable();
 269         __raw_writeb(MCF_RCR_SWRESET, MCF_IPSBAR + MCF_RCR);
 270 }
 271
 272 /***************************************************************************/
 273
 274 void __init config_BSP(char *commandp, int size)
 275 {
 276         mach_reset = m523x_cpu_reset;
 277 }
 278
 279 /***************************************************************************/
 280
 281 static int __init init_BSP(void)
 282 {
 283         m523x_fec_init();
 284 #if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
 285         m523x_qspi_init();
 286 #endif
 287         platform_add_devices(m523x_devices, ARRAY_SIZE(m523x_devices));
 288         return 0;
 289 }
 290
 291 arch_initcall(init_BSP);
 292
 293 /***************************************************************************/