arch/arm/mach-imx/generic.c

   1 /*
   2  *  arch/arm/mach-imx/generic.c
   3  *
   4  *  author: Sascha Hauer
   5  *  Created: april 20th, 2004
   6  *  Copyright: Synertronixx GmbH
   7  *
   8  *  Common code for i.MX machines
   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 as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  *
  24  */
  25 #include <linux/platform_device.h>
  26 #include <linux/init.h>
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/string.h>
  30
  31 #include <asm/arch/imxfb.h>
  32 #include <asm/hardware.h>
  33 #include <asm/arch/imx-regs.h>
  34
  35 #include <asm/mach/map.h>
  36
  37 void imx_gpio_mode(int gpio_mode)
  38 {
  39         unsigned int pin = gpio_mode & GPIO_PIN_MASK;
  40         unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
  41         unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
  42         unsigned int tmp;
  43
  44         /* Pullup enable */
  45         if(gpio_mode & GPIO_PUEN)
  46                 PUEN(port) |= (1<<pin);
  47         else
  48                 PUEN(port) &= ~(1<<pin);
  49
  50         /* Data direction */
  51         if(gpio_mode & GPIO_OUT)
  52                 DDIR(port) |= 1<<pin;
  53         else
  54                 DDIR(port) &= ~(1<<pin);
  55
  56         /* Primary / alternate function */
  57         if(gpio_mode & GPIO_AF)
  58                 GPR(port) |= (1<<pin);
  59         else
  60                 GPR(port) &= ~(1<<pin);
  61
  62         /* use as gpio? */
  63         if(gpio_mode &  GPIO_GIUS)
  64                 GIUS(port) |= (1<<pin);
  65         else
  66                 GIUS(port) &= ~(1<<pin);
  67
  68         /* Output / input configuration */
  69         /* FIXME: I'm not very sure about OCR and ICONF, someone
  70          * should have a look over it
  71          */
  72         if(pin<16) {
  73                 tmp = OCR1(port);
  74                 tmp &= ~( 3<<(pin*2));
  75                 tmp |= (ocr << (pin*2));
  76                 OCR1(port) = tmp;
  77
  78                 ICONFA1(port) &= ~( 3<<(pin*2));
  79                 ICONFA1(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
  80                 ICONFB1(port) &= ~( 3<<(pin*2));
  81                 ICONFB1(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
  82         } else {
  83                 tmp = OCR2(port);
  84                 tmp &= ~( 3<<((pin-16)*2));
  85                 tmp |= (ocr << ((pin-16)*2));
  86                 OCR2(port) = tmp;
  87
  88                 ICONFA2(port) &= ~( 3<<((pin-16)*2));
  89                 ICONFA2(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << ((pin-16) * 2);
  90                 ICONFB2(port) &= ~( 3<<((pin-16)*2));
  91                 ICONFB2(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << ((pin-16) * 2);
  92         }
  93 }
  94
  95 EXPORT_SYMBOL(imx_gpio_mode);
  96
  97 /*
  98  *  get the system pll clock in Hz
  99  *
 100  *                  mfi + mfn / (mfd +1)
 101  *  f = 2 * f_ref * --------------------
 102  *                        pd + 1
 103  */
 104 static unsigned int imx_decode_pll(unsigned int pll)
 105 {
 106         u32 mfi = (pll >> 10) & 0xf;
 107         u32 mfn = pll & 0x3ff;
 108         u32 mfd = (pll >> 16) & 0x3ff;
 109         u32 pd =  (pll >> 26) & 0xf;
 110         u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
 111
 112         mfi = mfi <= 5 ? 5 : mfi;
 113
 114         return (2 * (f_ref>>10) * ( (mfi<<10) + (mfn<<10) / (mfd+1) )) / (pd+1);
 115 }
 116
 117 unsigned int imx_get_system_clk(void)
 118 {
 119         return imx_decode_pll(SPCTL0);
 120 }
 121 EXPORT_SYMBOL(imx_get_system_clk);
 122
 123 unsigned int imx_get_mcu_clk(void)
 124 {
 125         return imx_decode_pll(MPCTL0);
 126 }
 127 EXPORT_SYMBOL(imx_get_mcu_clk);
 128
 129 /*
 130  *  get peripheral clock 1 ( UART[12], Timer[12], PWM )
 131  */
 132 unsigned int imx_get_perclk1(void)
 133 {
 134         return imx_get_system_clk() / (((PCDR) & 0xf)+1);
 135 }
 136 EXPORT_SYMBOL(imx_get_perclk1);
 137
 138 /*
 139  *  get peripheral clock 2 ( LCD, SD, SPI[12] )
 140  */
 141 unsigned int imx_get_perclk2(void)
 142 {
 143         return imx_get_system_clk() / (((PCDR>>4) & 0xf)+1);
 144 }
 145 EXPORT_SYMBOL(imx_get_perclk2);
 146
 147 /*
 148  *  get peripheral clock 3 ( SSI )
 149  */
 150 unsigned int imx_get_perclk3(void)
 151 {
 152         return imx_get_system_clk() / (((PCDR>>16) & 0x7f)+1);
 153 }
 154 EXPORT_SYMBOL(imx_get_perclk3);
 155
 156 /*
 157  *  get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
 158  */
 159 unsigned int imx_get_hclk(void)
 160 {
 161         return imx_get_system_clk() / (((CSCR>>10) & 0xf)+1);
 162 }
 163 EXPORT_SYMBOL(imx_get_hclk);
 164
 165 static struct resource imx_mmc_resources[] = {
 166         [0] = {
 167                 .start  = 0x00214000,
 168                 .end    = 0x002140FF,
 169                 .flags  = IORESOURCE_MEM,
 170         },
 171         [1] = {
 172                 .start  = (SDHC_INT),
 173                 .end    = (SDHC_INT),
 174                 .flags  = IORESOURCE_IRQ,
 175         },
 176 };
 177
 178 static struct platform_device imx_mmc_device = {
 179         .name           = "imx-mmc",
 180         .id             = 0,
 181         .num_resources  = ARRAY_SIZE(imx_mmc_resources),
 182         .resource       = imx_mmc_resources,
 183 };
 184
 185 static struct resource imx_uart1_resources[] = {
 186         [0] = {
 187                 .start  = 0x00206000,
 188                 .end    = 0x002060FF,
 189                 .flags  = IORESOURCE_MEM,
 190         },
 191         [1] = {
 192                 .start  = (UART1_MINT_RX),
 193                 .end    = (UART1_MINT_RX),
 194                 .flags  = IORESOURCE_IRQ,
 195         },
 196         [2] = {
 197                 .start  = (UART1_MINT_TX),
 198                 .end    = (UART1_MINT_TX),
 199                 .flags  = IORESOURCE_IRQ,
 200         },
 201 };
 202
 203 static struct platform_device imx_uart1_device = {
 204         .name           = "imx-uart",
 205         .id             = 0,
 206         .num_resources  = ARRAY_SIZE(imx_uart1_resources),
 207         .resource       = imx_uart1_resources,
 208 };
 209
 210 static struct resource imx_uart2_resources[] = {
 211         [0] = {
 212                 .start  = 0x00207000,
 213                 .end    = 0x002070FF,
 214                 .flags  = IORESOURCE_MEM,
 215         },
 216         [1] = {
 217                 .start  = (UART2_MINT_RX),
 218                 .end    = (UART2_MINT_RX),
 219                 .flags  = IORESOURCE_IRQ,
 220         },
 221         [2] = {
 222                 .start  = (UART2_MINT_TX),
 223                 .end    = (UART2_MINT_TX),
 224                 .flags  = IORESOURCE_IRQ,
 225         },
 226 };
 227
 228 static struct platform_device imx_uart2_device = {
 229         .name           = "imx-uart",
 230         .id             = 1,
 231         .num_resources  = ARRAY_SIZE(imx_uart2_resources),
 232         .resource       = imx_uart2_resources,
 233 };
 234
 235 static struct imxfb_mach_info imx_fb_info;
 236
 237 void __init set_imx_fb_info(struct imxfb_mach_info *hard_imx_fb_info)
 238 {
 239         memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imxfb_mach_info));
 240 }
 241 EXPORT_SYMBOL(set_imx_fb_info);
 242
 243 static struct resource imxfb_resources[] = {
 244         [0] = {
 245                 .start  = 0x00205000,
 246                 .end    = 0x002050FF,
 247                 .flags  = IORESOURCE_MEM,
 248         },
 249         [1] = {
 250                 .start  = LCDC_INT,
 251                 .end    = LCDC_INT,
 252                 .flags  = IORESOURCE_IRQ,
 253         },
 254 };
 255
 256 static u64 fb_dma_mask = ~(u64)0;
 257
 258 static struct platform_device imxfb_device = {
 259         .name           = "imx-fb",
 260         .id             = 0,
 261         .dev            = {
 262                 .platform_data  = &imx_fb_info,
 263                 .dma_mask       = &fb_dma_mask,
 264                 .coherent_dma_mask = 0xffffffff,
 265         },
 266         .num_resources  = ARRAY_SIZE(imxfb_resources),
 267         .resource       = imxfb_resources,
 268 };
 269
 270 static struct platform_device *devices[] __initdata = {
 271         &imx_mmc_device,
 272         &imxfb_device,
 273         &imx_uart1_device,
 274         &imx_uart2_device,
 275 };
 276
 277 static struct map_desc imx_io_desc[] __initdata = {
 278         {
 279                 .virtual        = IMX_IO_BASE,
 280                 .pfn            = __phys_to_pfn(IMX_IO_PHYS),
 281                 .length         = IMX_IO_SIZE,
 282                 .type           = MT_DEVICE
 283         }
 284 };
 285
 286 void __init
 287 imx_map_io(void)
 288 {
 289         iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc));
 290 }
 291
 292 static int __init imx_init(void)
 293 {
 294         return platform_add_devices(devices, ARRAY_SIZE(devices));
 295 }
 296
 297 subsys_initcall(imx_init);