arch/m68k/platform/520x/config.c

   1 /***************************************************************************/
   2
   3 /*
   4  *  linux/arch/m68knommu/platform/520x/config.c
   5  *
   6  *  Copyright (C) 2005,      Freescale (www.freescale.com)
   7  *  Copyright (C) 2005,      Intec Automation (mike@steroidmicros.com)
   8  *  Copyright (C) 1999-2007, Greg Ungerer (gerg@snapgear.com)
   9  *  Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
  10  */
  11
  12 /***************************************************************************/
  13
  14 #include <linux/kernel.h>
  15 #include <linux/param.h>
  16 #include <linux/init.h>
  17 #include <linux/io.h>
  18 #include <linux/spi/spi.h>
  19 #include <linux/gpio.h>
  20 #include <asm/machdep.h>
  21 #include <asm/coldfire.h>
  22 #include <asm/mcfsim.h>
  23 #include <asm/mcfuart.h>
  24 #include <asm/mcfqspi.h>
  25
  26 /***************************************************************************/
  27
  28 static struct mcf_platform_uart m520x_uart_platform[] = {
  29         {
  30                 .mapbase        = MCFUART_BASE1,
  31                 .irq            = MCFINT_VECBASE + MCFINT_UART0,
  32         },
  33         {
  34                 .mapbase        = MCFUART_BASE2,
  35                 .irq            = MCFINT_VECBASE + MCFINT_UART1,
  36         },
  37         {
  38                 .mapbase        = MCFUART_BASE3,
  39                 .irq            = MCFINT_VECBASE + MCFINT_UART2,
  40         },
  41         { },
  42 };
  43
  44 static struct platform_device m520x_uart = {
  45         .name                   = "mcfuart",
  46         .id                     = 0,
  47         .dev.platform_data      = m520x_uart_platform,
  48 };
  49
  50 static struct resource m520x_fec_resources[] = {
  51         {
  52                 .start          = MCFFEC_BASE,
  53                 .end            = MCFFEC_BASE + MCFFEC_SIZE - 1,
  54                 .flags          = IORESOURCE_MEM,
  55         },
  56         {
  57                 .start          = 64 + 36,
  58                 .end            = 64 + 36,
  59                 .flags          = IORESOURCE_IRQ,
  60         },
  61         {
  62                 .start          = 64 + 40,
  63                 .end            = 64 + 40,
  64                 .flags          = IORESOURCE_IRQ,
  65         },
  66         {
  67                 .start          = 64 + 42,
  68                 .end            = 64 + 42,
  69                 .flags          = IORESOURCE_IRQ,
  70         },
  71 };
  72
  73 static struct platform_device m520x_fec = {
  74         .name                   = "fec",
  75         .id                     = 0,
  76         .num_resources          = ARRAY_SIZE(m520x_fec_resources),
  77         .resource               = m520x_fec_resources,
  78 };
  79
  80 #if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
  81 static struct resource m520x_qspi_resources[] = {
  82         {
  83                 .start          = MCFQSPI_IOBASE,
  84                 .end            = MCFQSPI_IOBASE + MCFQSPI_IOSIZE - 1,
  85                 .flags          = IORESOURCE_MEM,
  86         },
  87         {
  88                 .start          = MCFINT_VECBASE + MCFINT_QSPI,
  89                 .end            = MCFINT_VECBASE + MCFINT_QSPI,
  90                 .flags          = IORESOURCE_IRQ,
  91         },
  92 };
  93
  94 #define MCFQSPI_CS0    46
  95 #define MCFQSPI_CS1    47
  96 #define MCFQSPI_CS2    27
  97
  98 static int m520x_cs_setup(struct mcfqspi_cs_control *cs_control)
  99 {
 100         int status;
 101
 102         status = gpio_request(MCFQSPI_CS0, "MCFQSPI_CS0");
 103         if (status) {
 104                 pr_debug("gpio_request for MCFQSPI_CS0 failed\n");
 105                 goto fail0;
 106         }
 107         status = gpio_direction_output(MCFQSPI_CS0, 1);
 108         if (status) {
 109                 pr_debug("gpio_direction_output for MCFQSPI_CS0 failed\n");
 110                 goto fail1;
 111         }
 112
 113         status = gpio_request(MCFQSPI_CS1, "MCFQSPI_CS1");
 114         if (status) {
 115                 pr_debug("gpio_request for MCFQSPI_CS1 failed\n");
 116                 goto fail1;
 117         }
 118         status = gpio_direction_output(MCFQSPI_CS1, 1);
 119         if (status) {
 120                 pr_debug("gpio_direction_output for MCFQSPI_CS1 failed\n");
 121                 goto fail2;
 122         }
 123
 124         status = gpio_request(MCFQSPI_CS2, "MCFQSPI_CS2");
 125         if (status) {
 126                 pr_debug("gpio_request for MCFQSPI_CS2 failed\n");
 127                 goto fail2;
 128         }
 129         status = gpio_direction_output(MCFQSPI_CS2, 1);
 130         if (status) {
 131                 pr_debug("gpio_direction_output for MCFQSPI_CS2 failed\n");
 132                 goto fail3;
 133         }
 134
 135         return 0;
 136
 137 fail3:
 138         gpio_free(MCFQSPI_CS2);
 139 fail2:
 140         gpio_free(MCFQSPI_CS1);
 141 fail1:
 142         gpio_free(MCFQSPI_CS0);
 143 fail0:
 144         return status;
 145 }
 146
 147 static void m520x_cs_teardown(struct mcfqspi_cs_control *cs_control)
 148 {
 149         gpio_free(MCFQSPI_CS2);
 150         gpio_free(MCFQSPI_CS1);
 151         gpio_free(MCFQSPI_CS0);
 152 }
 153
 154 static void m520x_cs_select(struct mcfqspi_cs_control *cs_control,
 155                             u8 chip_select, bool cs_high)
 156 {
 157         switch (chip_select) {
 158         case 0:
 159                 gpio_set_value(MCFQSPI_CS0, cs_high);
 160                 break;
 161         case 1:
 162                 gpio_set_value(MCFQSPI_CS1, cs_high);
 163                 break;
 164         case 2:
 165                 gpio_set_value(MCFQSPI_CS2, cs_high);
 166                 break;
 167         }
 168 }
 169
 170 static void m520x_cs_deselect(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         }
 184 }
 185
 186 static struct mcfqspi_cs_control m520x_cs_control = {
 187         .setup                  = m520x_cs_setup,
 188         .teardown               = m520x_cs_teardown,
 189         .select                 = m520x_cs_select,
 190         .deselect               = m520x_cs_deselect,
 191 };
 192
 193 static struct mcfqspi_platform_data m520x_qspi_data = {
 194         .bus_num                = 0,
 195         .num_chipselect         = 3,
 196         .cs_control             = &m520x_cs_control,
 197 };
 198
 199 static struct platform_device m520x_qspi = {
 200         .name                   = "mcfqspi",
 201         .id                     = 0,
 202         .num_resources          = ARRAY_SIZE(m520x_qspi_resources),
 203         .resource               = m520x_qspi_resources,
 204         .dev.platform_data      = &m520x_qspi_data,
 205 };
 206
 207 static void __init m520x_qspi_init(void)
 208 {
 209         u16 par;
 210         /* setup Port QS for QSPI with gpio CS control */
 211         writeb(0x3f, MCF_GPIO_PAR_QSPI);
 212         /* make U1CTS and U2RTS gpio for cs_control */
 213         par = readw(MCF_GPIO_PAR_UART);
 214         par &= 0x00ff;
 215         writew(par, MCF_GPIO_PAR_UART);
 216 }
 217 #endif /* defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE) */
 218
 219
 220 static struct platform_device *m520x_devices[] __initdata = {
 221         &m520x_uart,
 222         &m520x_fec,
 223 #if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
 224         &m520x_qspi,
 225 #endif
 226 };
 227
 228 /***************************************************************************/
 229
 230 static void __init m520x_uart_init_line(int line, int irq)
 231 {
 232         u16 par;
 233         u8 par2;
 234
 235         switch (line) {
 236         case 0:
 237                 par = readw(MCF_GPIO_PAR_UART);
 238                 par |= MCF_GPIO_PAR_UART_PAR_UTXD0 |
 239                        MCF_GPIO_PAR_UART_PAR_URXD0;
 240                 writew(par, MCF_GPIO_PAR_UART);
 241                 break;
 242         case 1:
 243                 par = readw(MCF_GPIO_PAR_UART);
 244                 par |= MCF_GPIO_PAR_UART_PAR_UTXD1 |
 245                        MCF_GPIO_PAR_UART_PAR_URXD1;
 246                 writew(par, MCF_GPIO_PAR_UART);
 247                 break;
 248         case 2:
 249                 par2 = readb(MCF_GPIO_PAR_FECI2C);
 250                 par2 &= ~0x0F;
 251                 par2 |= MCF_GPIO_PAR_FECI2C_PAR_SCL_UTXD2 |
 252                         MCF_GPIO_PAR_FECI2C_PAR_SDA_URXD2;
 253                 writeb(par2, MCF_GPIO_PAR_FECI2C);
 254                 break;
 255         }
 256 }
 257
 258 static void __init m520x_uarts_init(void)
 259 {
 260         const int nrlines = ARRAY_SIZE(m520x_uart_platform);
 261         int line;
 262
 263         for (line = 0; (line < nrlines); line++)
 264                 m520x_uart_init_line(line, m520x_uart_platform[line].irq);
 265 }
 266
 267 /***************************************************************************/
 268
 269 static void __init m520x_fec_init(void)
 270 {
 271         u8 v;
 272
 273         /* Set multi-function pins to ethernet mode */
 274         v = readb(MCF_GPIO_PAR_FEC);
 275         writeb(v | 0xf0, MCF_GPIO_PAR_FEC);
 276
 277         v = readb(MCF_GPIO_PAR_FECI2C);
 278         writeb(v | 0x0f, MCF_GPIO_PAR_FECI2C);
 279 }
 280
 281 /***************************************************************************/
 282
 283 static void m520x_cpu_reset(void)
 284 {
 285         local_irq_disable();
 286         __raw_writeb(MCF_RCR_SWRESET, MCF_RCR);
 287 }
 288
 289 /***************************************************************************/
 290
 291 void __init config_BSP(char *commandp, int size)
 292 {
 293         mach_reset = m520x_cpu_reset;
 294         m520x_uarts_init();
 295         m520x_fec_init();
 296 #if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
 297         m520x_qspi_init();
 298 #endif
 299 }
 300
 301 /***************************************************************************/
 302
 303 static int __init init_BSP(void)
 304 {
 305         platform_add_devices(m520x_devices, ARRAY_SIZE(m520x_devices));
 306         return 0;
 307 }
 308
 309 arch_initcall(init_BSP);
 310
 311 /***************************************************************************/