arch/arm/mach-mx5/board-cpuimx51.c

   1 /*
   2  *
   3  * Copyright (C) 2010 Eric Bénard <eric@eukrea.com>
   4  *
   5  * based on board-mx51_babbage.c which is
   6  * Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved.
   7  * Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria@canonical.com>
   8  *
   9  * The code contained herein is licensed under the GNU General Public
  10  * License. You may obtain a copy of the GNU General Public License
  11  * Version 2 or later at the following locations:
  12  *
  13  * http://www.opensource.org/licenses/gpl-license.html
  14  * http://www.gnu.org/copyleft/gpl.html
  15  */
  16
  17 #include <linux/init.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/serial_8250.h>
  20 #include <linux/i2c.h>
  21 #include <linux/gpio.h>
  22 #include <linux/delay.h>
  23 #include <linux/io.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/irq.h>
  26 #include <linux/fsl_devices.h>
  27
  28 #include <mach/eukrea-baseboards.h>
  29 #include <mach/common.h>
  30 #include <mach/hardware.h>
  31 #include <mach/iomux-mx51.h>
  32 #include <mach/mxc_ehci.h>
  33
  34 #include <asm/irq.h>
  35 #include <asm/setup.h>
  36 #include <asm/mach-types.h>
  37 #include <asm/mach/arch.h>
  38 #include <asm/mach/time.h>
  39
  40 #include "devices-imx51.h"
  41 #include "devices.h"
  42
  43 #define CPUIMX51_USBH1_STP      IMX_GPIO_NR(1, 27)
  44 #define CPUIMX51_QUARTA_GPIO    IMX_GPIO_NR(3, 28)
  45 #define CPUIMX51_QUARTB_GPIO    IMX_GPIO_NR(3, 25)
  46 #define CPUIMX51_QUARTC_GPIO    IMX_GPIO_NR(3, 26)
  47 #define CPUIMX51_QUARTD_GPIO    IMX_GPIO_NR(3, 27)
  48 #define CPUIMX51_QUARTA_IRQ     (MXC_INTERNAL_IRQS + CPUIMX51_QUARTA_GPIO)
  49 #define CPUIMX51_QUARTB_IRQ     (MXC_INTERNAL_IRQS + CPUIMX51_QUARTB_GPIO)
  50 #define CPUIMX51_QUARTC_IRQ     (MXC_INTERNAL_IRQS + CPUIMX51_QUARTC_GPIO)
  51 #define CPUIMX51_QUARTD_IRQ     (MXC_INTERNAL_IRQS + CPUIMX51_QUARTD_GPIO)
  52 #define CPUIMX51_QUART_XTAL     14745600
  53 #define CPUIMX51_QUART_REGSHIFT 17
  54
  55 /* USB_CTRL_1 */
  56 #define MX51_USB_CTRL_1_OFFSET          0x10
  57 #define MX51_USB_CTRL_UH1_EXT_CLK_EN    (1 << 25)
  58
  59 #define MX51_USB_PLLDIV_12_MHZ          0x00
  60 #define MX51_USB_PLL_DIV_19_2_MHZ       0x01
  61 #define MX51_USB_PLL_DIV_24_MHZ         0x02
  62
  63 static struct plat_serial8250_port serial_platform_data[] = {
  64         {
  65                 .mapbase = (unsigned long)(MX51_CS1_BASE_ADDR + 0x400000),
  66                 .irq = CPUIMX51_QUARTA_IRQ,
  67                 .irqflags = IRQF_TRIGGER_HIGH,
  68                 .uartclk = CPUIMX51_QUART_XTAL,
  69                 .regshift = CPUIMX51_QUART_REGSHIFT,
  70                 .iotype = UPIO_MEM,
  71                 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP,
  72         }, {
  73                 .mapbase = (unsigned long)(MX51_CS1_BASE_ADDR + 0x800000),
  74                 .irq = CPUIMX51_QUARTB_IRQ,
  75                 .irqflags = IRQF_TRIGGER_HIGH,
  76                 .uartclk = CPUIMX51_QUART_XTAL,
  77                 .regshift = CPUIMX51_QUART_REGSHIFT,
  78                 .iotype = UPIO_MEM,
  79                 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP,
  80         }, {
  81                 .mapbase = (unsigned long)(MX51_CS1_BASE_ADDR + 0x1000000),
  82                 .irq = CPUIMX51_QUARTC_IRQ,
  83                 .irqflags = IRQF_TRIGGER_HIGH,
  84                 .uartclk = CPUIMX51_QUART_XTAL,
  85                 .regshift = CPUIMX51_QUART_REGSHIFT,
  86                 .iotype = UPIO_MEM,
  87                 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP,
  88         }, {
  89                 .mapbase = (unsigned long)(MX51_CS1_BASE_ADDR + 0x2000000),
  90                 .irq = CPUIMX51_QUARTD_IRQ,
  91                 .irqflags = IRQF_TRIGGER_HIGH,
  92                 .uartclk = CPUIMX51_QUART_XTAL,
  93                 .regshift = CPUIMX51_QUART_REGSHIFT,
  94                 .iotype = UPIO_MEM,
  95                 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP,
  96         }, {
  97         }
  98 };
  99
 100 static struct platform_device serial_device = {
 101         .name = "serial8250",
 102         .id = 0,
 103         .dev = {
 104                 .platform_data = serial_platform_data,
 105         },
 106 };
 107
 108 static struct platform_device *devices[] __initdata = {
 109         &serial_device,
 110 };
 111
 112 static iomux_v3_cfg_t eukrea_cpuimx51_pads[] = {
 113         /* UART1 */
 114         MX51_PAD_UART1_RXD__UART1_RXD,
 115         MX51_PAD_UART1_TXD__UART1_TXD,
 116         MX51_PAD_UART1_RTS__UART1_RTS,
 117         MX51_PAD_UART1_CTS__UART1_CTS,
 118
 119         /* I2C2 */
 120         MX51_PAD_GPIO1_2__I2C2_SCL,
 121         MX51_PAD_GPIO1_3__I2C2_SDA,
 122         MX51_PAD_NANDF_D10__GPIO3_30,
 123
 124         /* QUART IRQ */
 125         MX51_PAD_NANDF_D15__GPIO3_25,
 126         MX51_PAD_NANDF_D14__GPIO3_26,
 127         MX51_PAD_NANDF_D13__GPIO3_27,
 128         MX51_PAD_NANDF_D12__GPIO3_28,
 129
 130         /* USB HOST1 */
 131         MX51_PAD_USBH1_CLK__USBH1_CLK,
 132         MX51_PAD_USBH1_DIR__USBH1_DIR,
 133         MX51_PAD_USBH1_NXT__USBH1_NXT,
 134         MX51_PAD_USBH1_DATA0__USBH1_DATA0,
 135         MX51_PAD_USBH1_DATA1__USBH1_DATA1,
 136         MX51_PAD_USBH1_DATA2__USBH1_DATA2,
 137         MX51_PAD_USBH1_DATA3__USBH1_DATA3,
 138         MX51_PAD_USBH1_DATA4__USBH1_DATA4,
 139         MX51_PAD_USBH1_DATA5__USBH1_DATA5,
 140         MX51_PAD_USBH1_DATA6__USBH1_DATA6,
 141         MX51_PAD_USBH1_DATA7__USBH1_DATA7,
 142         MX51_PAD_USBH1_STP__USBH1_STP,
 143 };
 144
 145 static const struct mxc_nand_platform_data
 146                 eukrea_cpuimx51_nand_board_info __initconst = {
 147         .width          = 1,
 148         .hw_ecc         = 1,
 149         .flash_bbt      = 1,
 150 };
 151
 152 static const struct imxuart_platform_data uart_pdata __initconst = {
 153         .flags = IMXUART_HAVE_RTSCTS,
 154 };
 155
 156 static const
 157 struct imxi2c_platform_data eukrea_cpuimx51_i2c_data __initconst = {
 158         .bitrate = 100000,
 159 };
 160
 161 static struct i2c_board_info eukrea_cpuimx51_i2c_devices[] = {
 162         {
 163                 I2C_BOARD_INFO("pcf8563", 0x51),
 164         },
 165 };
 166
 167 /* This function is board specific as the bit mask for the plldiv will also
 168 be different for other Freescale SoCs, thus a common bitmask is not
 169 possible and cannot get place in /plat-mxc/ehci.c.*/
 170 static int initialize_otg_port(struct platform_device *pdev)
 171 {
 172         u32 v;
 173         void __iomem *usb_base;
 174         void __iomem *usbother_base;
 175
 176         usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
 177         if (!usb_base)
 178                 return -ENOMEM;
 179         usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
 180
 181         /* Set the PHY clock to 19.2MHz */
 182         v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
 183         v &= ~MX5_USB_UTMI_PHYCTRL1_PLLDIV_MASK;
 184         v |= MX51_USB_PLL_DIV_19_2_MHZ;
 185         __raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
 186         iounmap(usb_base);
 187
 188         mdelay(10);
 189
 190         return mx51_initialize_usb_hw(0, MXC_EHCI_INTERNAL_PHY);
 191 }
 192
 193 static int initialize_usbh1_port(struct platform_device *pdev)
 194 {
 195         u32 v;
 196         void __iomem *usb_base;
 197         void __iomem *usbother_base;
 198
 199         usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
 200         if (!usb_base)
 201                 return -ENOMEM;
 202         usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
 203
 204         /* The clock for the USBH1 ULPI port will come externally from the PHY. */
 205         v = __raw_readl(usbother_base + MX51_USB_CTRL_1_OFFSET);
 206         __raw_writel(v | MX51_USB_CTRL_UH1_EXT_CLK_EN, usbother_base + MX51_USB_CTRL_1_OFFSET);
 207         iounmap(usb_base);
 208
 209         mdelay(10);
 210
 211         return mx51_initialize_usb_hw(1, MXC_EHCI_POWER_PINS_ENABLED |
 212                         MXC_EHCI_ITC_NO_THRESHOLD);
 213 }
 214
 215 static struct mxc_usbh_platform_data dr_utmi_config = {
 216         .init           = initialize_otg_port,
 217         .portsc = MXC_EHCI_UTMI_16BIT,
 218 };
 219
 220 static struct fsl_usb2_platform_data usb_pdata = {
 221         .operating_mode = FSL_USB2_DR_DEVICE,
 222         .phy_mode       = FSL_USB2_PHY_UTMI_WIDE,
 223 };
 224
 225 static struct mxc_usbh_platform_data usbh1_config = {
 226         .init           = initialize_usbh1_port,
 227         .portsc = MXC_EHCI_MODE_ULPI,
 228 };
 229
 230 static int otg_mode_host;
 231
 232 static int __init eukrea_cpuimx51_otg_mode(char *options)
 233 {
 234         if (!strcmp(options, "host"))
 235                 otg_mode_host = 1;
 236         else if (!strcmp(options, "device"))
 237                 otg_mode_host = 0;
 238         else
 239                 pr_info("otg_mode neither \"host\" nor \"device\". "
 240                         "Defaulting to device\n");
 241         return 0;
 242 }
 243 __setup("otg_mode=", eukrea_cpuimx51_otg_mode);
 244
 245 /*
 246  * Board specific initialization.
 247  */
 248 static void __init eukrea_cpuimx51_init(void)
 249 {
 250         mxc_iomux_v3_setup_multiple_pads(eukrea_cpuimx51_pads,
 251                                         ARRAY_SIZE(eukrea_cpuimx51_pads));
 252
 253         imx51_add_imx_uart(0, &uart_pdata);
 254         imx51_add_mxc_nand(&eukrea_cpuimx51_nand_board_info);
 255
 256         gpio_request(CPUIMX51_QUARTA_GPIO, "quarta_irq");
 257         gpio_direction_input(CPUIMX51_QUARTA_GPIO);
 258         gpio_free(CPUIMX51_QUARTA_GPIO);
 259         gpio_request(CPUIMX51_QUARTB_GPIO, "quartb_irq");
 260         gpio_direction_input(CPUIMX51_QUARTB_GPIO);
 261         gpio_free(CPUIMX51_QUARTB_GPIO);
 262         gpio_request(CPUIMX51_QUARTC_GPIO, "quartc_irq");
 263         gpio_direction_input(CPUIMX51_QUARTC_GPIO);
 264         gpio_free(CPUIMX51_QUARTC_GPIO);
 265         gpio_request(CPUIMX51_QUARTD_GPIO, "quartd_irq");
 266         gpio_direction_input(CPUIMX51_QUARTD_GPIO);
 267         gpio_free(CPUIMX51_QUARTD_GPIO);
 268
 269         imx51_add_fec(NULL);
 270         platform_add_devices(devices, ARRAY_SIZE(devices));
 271
 272         imx51_add_imx_i2c(1, &eukrea_cpuimx51_i2c_data);
 273         i2c_register_board_info(1, eukrea_cpuimx51_i2c_devices,
 274                                 ARRAY_SIZE(eukrea_cpuimx51_i2c_devices));
 275
 276         if (otg_mode_host)
 277                 mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config);
 278         else {
 279                 initialize_otg_port(NULL);
 280                 mxc_register_device(&mxc_usbdr_udc_device, &usb_pdata);
 281         }
 282         mxc_register_device(&mxc_usbh1_device, &usbh1_config);
 283
 284 #ifdef CONFIG_MACH_EUKREA_MBIMX51_BASEBOARD
 285         eukrea_mbimx51_baseboard_init();
 286 #endif
 287 }
 288
 289 static void __init eukrea_cpuimx51_timer_init(void)
 290 {
 291         mx51_clocks_init(32768, 24000000, 22579200, 0);
 292 }
 293
 294 static struct sys_timer mxc_timer = {
 295         .init   = eukrea_cpuimx51_timer_init,
 296 };
 297
 298 MACHINE_START(EUKREA_CPUIMX51, "Eukrea CPUIMX51 Module")
 299         /* Maintainer: Eric Bénard <eric@eukrea.com> */
 300         .boot_params = MX51_PHYS_OFFSET + 0x100,
 301         .map_io = mx51_map_io,
 302         .init_early = imx51_init_early,
 303         .init_irq = mx51_init_irq,
 304         .timer = &mxc_timer,
 305         .init_machine = eukrea_cpuimx51_init,
 306 MACHINE_END