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 <asm/arch/imxfb.h>
  30 #include <asm/hardware.h>
  31 #include <asm/arch/imx-regs.h>
  32
  33 #include <asm/mach/map.h>
  34
  35 void imx_gpio_mode(int gpio_mode)
  36 {
  37         unsigned int pin = gpio_mode & GPIO_PIN_MASK;
  38         unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
  39         unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
  40         unsigned int tmp;
  41
  42         /* Pullup enable */
  43         if(gpio_mode & GPIO_PUEN)
  44                 PUEN(port) |= (1<<pin);
  45         else
  46                 PUEN(port) &= ~(1<<pin);
  47
  48         /* Data direction */
  49         if(gpio_mode & GPIO_OUT)
  50                 DDIR(port) |= 1<<pin;
  51         else
  52                 DDIR(port) &= ~(1<<pin);
  53
  54         /* Primary / alternate function */
  55         if(gpio_mode & GPIO_AF)
  56                 GPR(port) |= (1<<pin);
  57         else
  58                 GPR(port) &= ~(1<<pin);
  59
  60         /* use as gpio? */
  61         if(gpio_mode &  GPIO_GIUS)
  62                 GIUS(port) |= (1<<pin);
  63         else
  64                 GIUS(port) &= ~(1<<pin);
  65
  66         /* Output / input configuration */
  67         /* FIXME: I'm not very sure about OCR and ICONF, someone
  68          * should have a look over it
  69          */
  70         if(pin<16) {
  71                 tmp = OCR1(port);
  72                 tmp &= ~( 3<<(pin*2));
  73                 tmp |= (ocr << (pin*2));
  74                 OCR1(port) = tmp;
  75
  76                 ICONFA1(port) &= ~( 3<<(pin*2));
  77                 ICONFA1(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
  78                 ICONFB1(port) &= ~( 3<<(pin*2));
  79                 ICONFB1(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
  80         } else {
  81                 tmp = OCR2(port);
  82                 tmp &= ~( 3<<((pin-16)*2));
  83                 tmp |= (ocr << ((pin-16)*2));
  84                 OCR2(port) = tmp;
  85
  86                 ICONFA2(port) &= ~( 3<<((pin-16)*2));
  87                 ICONFA2(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << ((pin-16) * 2);
  88                 ICONFB2(port) &= ~( 3<<((pin-16)*2));
  89                 ICONFB2(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << ((pin-16) * 2);
  90         }
  91 }
  92
  93 EXPORT_SYMBOL(imx_gpio_mode);
  94
  95 /*
  96  *  get the system pll clock in Hz
  97  *
  98  *                  mfi + mfn / (mfd +1)
  99  *  f = 2 * f_ref * --------------------
 100  *                        pd + 1
 101  */
 102 static unsigned int imx_decode_pll(unsigned int pll)
 103 {
 104         u32 mfi = (pll >> 10) & 0xf;
 105         u32 mfn = pll & 0x3ff;
 106         u32 mfd = (pll >> 16) & 0x3ff;
 107         u32 pd =  (pll >> 26) & 0xf;
 108         u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
 109
 110         mfi = mfi <= 5 ? 5 : mfi;
 111
 112         return (2 * (f_ref>>10) * ( (mfi<<10) + (mfn<<10) / (mfd+1) )) / (pd+1);
 113 }
 114
 115 unsigned int imx_get_system_clk(void)
 116 {
 117         return imx_decode_pll(SPCTL0);
 118 }
 119 EXPORT_SYMBOL(imx_get_system_clk);
 120
 121 unsigned int imx_get_mcu_clk(void)
 122 {
 123         return imx_decode_pll(MPCTL0);
 124 }
 125 EXPORT_SYMBOL(imx_get_mcu_clk);
 126
 127 /*
 128  *  get peripheral clock 1 ( UART[12], Timer[12], PWM )
 129  */
 130 unsigned int imx_get_perclk1(void)
 131 {
 132         return imx_get_system_clk() / (((PCDR) & 0xf)+1);
 133 }
 134 EXPORT_SYMBOL(imx_get_perclk1);
 135
 136 /*
 137  *  get peripheral clock 2 ( LCD, SD, SPI[12] )
 138  */
 139 unsigned int imx_get_perclk2(void)
 140 {
 141         return imx_get_system_clk() / (((PCDR>>4) & 0xf)+1);
 142 }
 143 EXPORT_SYMBOL(imx_get_perclk2);
 144
 145 /*
 146  *  get peripheral clock 3 ( SSI )
 147  */
 148 unsigned int imx_get_perclk3(void)
 149 {
 150         return imx_get_system_clk() / (((PCDR>>16) & 0x7f)+1);
 151 }
 152 EXPORT_SYMBOL(imx_get_perclk3);
 153
 154 /*
 155  *  get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
 156  */
 157 unsigned int imx_get_hclk(void)
 158 {
 159         return imx_get_system_clk() / (((CSCR>>10) & 0xf)+1);
 160 }
 161 EXPORT_SYMBOL(imx_get_hclk);
 162
 163 static struct resource imx_mmc_resources[] = {
 164         [0] = {
 165                 .start  = 0x00214000,
 166                 .end    = 0x002140FF,
 167                 .flags  = IORESOURCE_MEM,
 168         },
 169         [1] = {
 170                 .start  = (SDHC_INT),
 171                 .end    = (SDHC_INT),
 172                 .flags  = IORESOURCE_IRQ,
 173         },
 174 };
 175
 176 static struct platform_device imx_mmc_device = {
 177         .name           = "imx-mmc",
 178         .id             = 0,
 179         .num_resources  = ARRAY_SIZE(imx_mmc_resources),
 180         .resource       = imx_mmc_resources,
 181 };
 182
 183 static struct resource imx_uart1_resources[] = {
 184         [0] = {
 185                 .start  = 0x00206000,
 186                 .end    = 0x002060FF,
 187                 .flags  = IORESOURCE_MEM,
 188         },
 189         [1] = {
 190                 .start  = (UART1_MINT_RX),
 191                 .end    = (UART1_MINT_RX),
 192                 .flags  = IORESOURCE_IRQ,
 193         },
 194         [2] = {
 195                 .start  = (UART1_MINT_TX),
 196                 .end    = (UART1_MINT_TX),
 197                 .flags  = IORESOURCE_IRQ,
 198         },
 199 };
 200
 201 static struct platform_device imx_uart1_device = {
 202         .name           = "imx-uart",
 203         .id             = 0,
 204         .num_resources  = ARRAY_SIZE(imx_uart1_resources),
 205         .resource       = imx_uart1_resources,
 206 };
 207
 208 static struct resource imx_uart2_resources[] = {
 209         [0] = {
 210                 .start  = 0x00207000,
 211                 .end    = 0x002070FF,
 212                 .flags  = IORESOURCE_MEM,
 213         },
 214         [1] = {
 215                 .start  = (UART2_MINT_RX),
 216                 .end    = (UART2_MINT_RX),
 217                 .flags  = IORESOURCE_IRQ,
 218         },
 219         [2] = {
 220                 .start  = (UART2_MINT_TX),
 221                 .end    = (UART2_MINT_TX),
 222                 .flags  = IORESOURCE_IRQ,
 223         },
 224 };
 225
 226 static struct platform_device imx_uart2_device = {
 227         .name           = "imx-uart",
 228         .id             = 1,
 229         .num_resources  = ARRAY_SIZE(imx_uart2_resources),
 230         .resource       = imx_uart2_resources,
 231 };
 232
 233 static struct imxfb_mach_info imx_fb_info;
 234
 235 void __init set_imx_fb_info(struct imxfb_mach_info *hard_imx_fb_info)
 236 {
 237         memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imxfb_mach_info));
 238 }
 239 EXPORT_SYMBOL(set_imx_fb_info);
 240
 241 static struct resource imxfb_resources[] = {
 242         [0] = {
 243                 .start  = 0x00205000,
 244                 .end    = 0x002050FF,
 245                 .flags  = IORESOURCE_MEM,
 246         },
 247         [1] = {
 248                 .start  = LCDC_INT,
 249                 .end    = LCDC_INT,
 250                 .flags  = IORESOURCE_IRQ,
 251         },
 252 };
 253
 254 static u64 fb_dma_mask = ~(u64)0;
 255
 256 static struct platform_device imxfb_device = {
 257         .name           = "imx-fb",
 258         .id             = 0,
 259         .dev            = {
 260                 .platform_data  = &imx_fb_info,
 261                 .dma_mask       = &fb_dma_mask,
 262                 .coherent_dma_mask = 0xffffffff,
 263         },
 264         .num_resources  = ARRAY_SIZE(imxfb_resources),
 265         .resource       = imxfb_resources,
 266 };
 267
 268 static struct platform_device *devices[] __initdata = {
 269         &imx_mmc_device,
 270         &imxfb_device,
 271         &imx_uart1_device,
 272         &imx_uart2_device,
 273 };
 274
 275 static struct map_desc imx_io_desc[] __initdata = {
 276         {
 277                 .virtual        = IMX_IO_BASE,
 278                 .pfn            = __phys_to_pfn(IMX_IO_PHYS),
 279                 .length         = IMX_IO_SIZE,
 280                 .type           = MT_DEVICE
 281         }
 282 };
 283
 284 void __init
 285 imx_map_io(void)
 286 {
 287         iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc));
 288 }
 289
 290 static int __init imx_init(void)
 291 {
 292         return platform_add_devices(devices, ARRAY_SIZE(devices));
 293 }
 294
 295 subsys_initcall(imx_init);