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