arch/arm/mach-davinci/board-omapl138-hawk.c

   1 /*
   2  * Hawkboard.org based on TI's OMAP-L138 Platform
   3  *
   4  * Initial code: Syed Mohammed Khasim
   5  *
   6  * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com
   7  *
   8  * This file is licensed under the terms of the GNU General Public License
   9  * version 2. This program is licensed "as is" without any warranty of
  10  * any kind, whether express or implied.
  11  */
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/console.h>
  15 #include <linux/gpio.h>
  16 #include <linux/platform_data/gpio-davinci.h>
  17
  18 #include <asm/mach-types.h>
  19 #include <asm/mach/arch.h>
  20
  21 #include <mach/common.h>
  22 #include <mach/cp_intc.h>
  23 #include <mach/da8xx.h>
  24 #include <mach/mux.h>
  25
  26 #define HAWKBOARD_PHY_ID                "davinci_mdio-0:07"
  27 #define DA850_HAWK_MMCSD_CD_PIN         GPIO_TO_PIN(3, 12)
  28 #define DA850_HAWK_MMCSD_WP_PIN         GPIO_TO_PIN(3, 13)
  29
  30 #define DA850_USB1_VBUS_PIN             GPIO_TO_PIN(2, 4)
  31 #define DA850_USB1_OC_PIN               GPIO_TO_PIN(6, 13)
  32
  33 static short omapl138_hawk_mii_pins[] __initdata = {
  34         DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
  35         DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
  36         DA850_MII_CRS, DA850_MII_RXCLK, DA850_MII_RXDV, DA850_MII_RXD_3,
  37         DA850_MII_RXD_2, DA850_MII_RXD_1, DA850_MII_RXD_0, DA850_MDIO_CLK,
  38         DA850_MDIO_D,
  39         -1
  40 };
  41
  42 static __init void omapl138_hawk_config_emac(void)
  43 {
  44         void __iomem *cfgchip3 = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG);
  45         int ret;
  46         u32 val;
  47         struct davinci_soc_info *soc_info = &davinci_soc_info;
  48
  49         val = __raw_readl(cfgchip3);
  50         val &= ~BIT(8);
  51         ret = davinci_cfg_reg_list(omapl138_hawk_mii_pins);
  52         if (ret) {
  53                 pr_warn("%s: CPGMAC/MII mux setup failed: %d\n", __func__, ret);
  54                 return;
  55         }
  56
  57         /* configure the CFGCHIP3 register for MII */
  58         __raw_writel(val, cfgchip3);
  59         pr_info("EMAC: MII PHY configured\n");
  60
  61         soc_info->emac_pdata->phy_id = HAWKBOARD_PHY_ID;
  62
  63         ret = da8xx_register_emac();
  64         if (ret)
  65                 pr_warn("%s: EMAC registration failed: %d\n", __func__, ret);
  66 }
  67
  68 /*
  69  * The following EDMA channels/slots are not being used by drivers (for
  70  * example: Timer, GPIO, UART events etc) on da850/omap-l138 EVM/Hawkboard,
  71  * hence they are being reserved for codecs on the DSP side.
  72  */
  73 static const s16 da850_dma0_rsv_chans[][2] = {
  74         /* (offset, number) */
  75         { 8,  6},
  76         {24,  4},
  77         {30,  2},
  78         {-1, -1}
  79 };
  80
  81 static const s16 da850_dma0_rsv_slots[][2] = {
  82         /* (offset, number) */
  83         { 8,  6},
  84         {24,  4},
  85         {30, 50},
  86         {-1, -1}
  87 };
  88
  89 static const s16 da850_dma1_rsv_chans[][2] = {
  90         /* (offset, number) */
  91         { 0, 28},
  92         {30,  2},
  93         {-1, -1}
  94 };
  95
  96 static const s16 da850_dma1_rsv_slots[][2] = {
  97         /* (offset, number) */
  98         { 0, 28},
  99         {30, 90},
 100         {-1, -1}
 101 };
 102
 103 static struct edma_rsv_info da850_edma_cc0_rsv = {
 104         .rsv_chans      = da850_dma0_rsv_chans,
 105         .rsv_slots      = da850_dma0_rsv_slots,
 106 };
 107
 108 static struct edma_rsv_info da850_edma_cc1_rsv = {
 109         .rsv_chans      = da850_dma1_rsv_chans,
 110         .rsv_slots      = da850_dma1_rsv_slots,
 111 };
 112
 113 static struct edma_rsv_info *da850_edma_rsv[2] = {
 114         &da850_edma_cc0_rsv,
 115         &da850_edma_cc1_rsv,
 116 };
 117
 118 static const short hawk_mmcsd0_pins[] = {
 119         DA850_MMCSD0_DAT_0, DA850_MMCSD0_DAT_1, DA850_MMCSD0_DAT_2,
 120         DA850_MMCSD0_DAT_3, DA850_MMCSD0_CLK, DA850_MMCSD0_CMD,
 121         DA850_GPIO3_12, DA850_GPIO3_13,
 122         -1
 123 };
 124
 125 static int da850_hawk_mmc_get_ro(int index)
 126 {
 127         return gpio_get_value(DA850_HAWK_MMCSD_WP_PIN);
 128 }
 129
 130 static int da850_hawk_mmc_get_cd(int index)
 131 {
 132         return !gpio_get_value(DA850_HAWK_MMCSD_CD_PIN);
 133 }
 134
 135 static struct davinci_mmc_config da850_mmc_config = {
 136         .get_ro         = da850_hawk_mmc_get_ro,
 137         .get_cd         = da850_hawk_mmc_get_cd,
 138         .wires          = 4,
 139         .max_freq       = 50000000,
 140         .caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
 141 };
 142
 143 static __init void omapl138_hawk_mmc_init(void)
 144 {
 145         int ret;
 146
 147         ret = davinci_cfg_reg_list(hawk_mmcsd0_pins);
 148         if (ret) {
 149                 pr_warn("%s: MMC/SD0 mux setup failed: %d\n", __func__, ret);
 150                 return;
 151         }
 152
 153         ret = gpio_request_one(DA850_HAWK_MMCSD_CD_PIN,
 154                         GPIOF_DIR_IN, "MMC CD");
 155         if (ret < 0) {
 156                 pr_warn("%s: can not open GPIO %d\n",
 157                         __func__, DA850_HAWK_MMCSD_CD_PIN);
 158                 return;
 159         }
 160
 161         ret = gpio_request_one(DA850_HAWK_MMCSD_WP_PIN,
 162                         GPIOF_DIR_IN, "MMC WP");
 163         if (ret < 0) {
 164                 pr_warn("%s: can not open GPIO %d\n",
 165                         __func__, DA850_HAWK_MMCSD_WP_PIN);
 166                 goto mmc_setup_wp_fail;
 167         }
 168
 169         ret = da8xx_register_mmcsd0(&da850_mmc_config);
 170         if (ret) {
 171                 pr_warn("%s: MMC/SD0 registration failed: %d\n", __func__, ret);
 172                 goto mmc_setup_mmcsd_fail;
 173         }
 174
 175         return;
 176
 177 mmc_setup_mmcsd_fail:
 178         gpio_free(DA850_HAWK_MMCSD_WP_PIN);
 179 mmc_setup_wp_fail:
 180         gpio_free(DA850_HAWK_MMCSD_CD_PIN);
 181 }
 182
 183 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id);
 184 static da8xx_ocic_handler_t hawk_usb_ocic_handler;
 185
 186 static const short da850_hawk_usb11_pins[] = {
 187         DA850_GPIO2_4, DA850_GPIO6_13,
 188         -1
 189 };
 190
 191 static int hawk_usb_set_power(unsigned port, int on)
 192 {
 193         gpio_set_value(DA850_USB1_VBUS_PIN, on);
 194         return 0;
 195 }
 196
 197 static int hawk_usb_get_power(unsigned port)
 198 {
 199         return gpio_get_value(DA850_USB1_VBUS_PIN);
 200 }
 201
 202 static int hawk_usb_get_oci(unsigned port)
 203 {
 204         return !gpio_get_value(DA850_USB1_OC_PIN);
 205 }
 206
 207 static int hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)
 208 {
 209         int irq         = gpio_to_irq(DA850_USB1_OC_PIN);
 210         int error       = 0;
 211
 212         if (handler != NULL) {
 213                 hawk_usb_ocic_handler = handler;
 214
 215                 error = request_irq(irq, omapl138_hawk_usb_ocic_irq,
 216                                         IRQF_TRIGGER_RISING |
 217                                         IRQF_TRIGGER_FALLING,
 218                                         "OHCI over-current indicator", NULL);
 219                 if (error)
 220                         pr_err("%s: could not request IRQ to watch "
 221                                 "over-current indicator changes\n", __func__);
 222         } else {
 223                 free_irq(irq, NULL);
 224         }
 225         return error;
 226 }
 227
 228 static struct da8xx_ohci_root_hub omapl138_hawk_usb11_pdata = {
 229         .set_power      = hawk_usb_set_power,
 230         .get_power      = hawk_usb_get_power,
 231         .get_oci        = hawk_usb_get_oci,
 232         .ocic_notify    = hawk_usb_ocic_notify,
 233         /* TPS2087 switch @ 5V */
 234         .potpgt         = (3 + 1) / 2,  /* 3 ms max */
 235 };
 236
 237 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id)
 238 {
 239         hawk_usb_ocic_handler(&omapl138_hawk_usb11_pdata, 1);
 240         return IRQ_HANDLED;
 241 }
 242
 243 static __init void omapl138_hawk_usb_init(void)
 244 {
 245         int ret;
 246         u32 cfgchip2;
 247
 248         ret = davinci_cfg_reg_list(da850_hawk_usb11_pins);
 249         if (ret) {
 250                 pr_warn("%s: USB 1.1 PinMux setup failed: %d\n", __func__, ret);
 251                 return;
 252         }
 253
 254         /* Setup the Ref. clock frequency for the HAWK at 24 MHz. */
 255
 256         cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
 257         cfgchip2 &= ~CFGCHIP2_REFFREQ;
 258         cfgchip2 |=  CFGCHIP2_REFFREQ_24MHZ;
 259         __raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
 260
 261         ret = gpio_request_one(DA850_USB1_VBUS_PIN,
 262                         GPIOF_DIR_OUT, "USB1 VBUS");
 263         if (ret < 0) {
 264                 pr_err("%s: failed to request GPIO for USB 1.1 port "
 265                         "power control: %d\n", __func__, ret);
 266                 return;
 267         }
 268
 269         ret = gpio_request_one(DA850_USB1_OC_PIN,
 270                         GPIOF_DIR_IN, "USB1 OC");
 271         if (ret < 0) {
 272                 pr_err("%s: failed to request GPIO for USB 1.1 port "
 273                         "over-current indicator: %d\n", __func__, ret);
 274                 goto usb11_setup_oc_fail;
 275         }
 276
 277         ret = da8xx_register_usb11(&omapl138_hawk_usb11_pdata);
 278         if (ret) {
 279                 pr_warn("%s: USB 1.1 registration failed: %d\n", __func__, ret);
 280                 goto usb11_setup_fail;
 281         }
 282
 283         return;
 284
 285 usb11_setup_fail:
 286         gpio_free(DA850_USB1_OC_PIN);
 287 usb11_setup_oc_fail:
 288         gpio_free(DA850_USB1_VBUS_PIN);
 289 }
 290
 291 static __init void omapl138_hawk_init(void)
 292 {
 293         int ret;
 294
 295         ret = da850_register_gpio();
 296         if (ret)
 297                 pr_warn("%s: GPIO init failed: %d\n", __func__, ret);
 298
 299         davinci_serial_init(da8xx_serial_device);
 300
 301         omapl138_hawk_config_emac();
 302
 303         ret = da850_register_edma(da850_edma_rsv);
 304         if (ret)
 305                 pr_warn("%s: EDMA registration failed: %d\n", __func__, ret);
 306
 307         omapl138_hawk_mmc_init();
 308
 309         omapl138_hawk_usb_init();
 310
 311         ret = da8xx_register_watchdog();
 312         if (ret)
 313                 pr_warn("%s: watchdog registration failed: %d\n",
 314                         __func__, ret);
 315
 316         ret = da8xx_register_rproc();
 317         if (ret)
 318                 pr_warn("%s: dsp/rproc registration failed: %d\n",
 319                         __func__, ret);
 320 }
 321
 322 #ifdef CONFIG_SERIAL_8250_CONSOLE
 323 static int __init omapl138_hawk_console_init(void)
 324 {
 325         if (!machine_is_omapl138_hawkboard())
 326                 return 0;
 327
 328         return add_preferred_console("ttyS", 2, "115200");
 329 }
 330 console_initcall(omapl138_hawk_console_init);
 331 #endif
 332
 333 static void __init omapl138_hawk_map_io(void)
 334 {
 335         da850_init();
 336 }
 337
 338 MACHINE_START(OMAPL138_HAWKBOARD, "AM18x/OMAP-L138 Hawkboard")
 339         .atag_offset    = 0x100,
 340         .map_io         = omapl138_hawk_map_io,
 341         .init_irq       = cp_intc_init,
 342         .init_time      = davinci_timer_init,
 343         .init_machine   = omapl138_hawk_init,
 344         .init_late      = davinci_init_late,
 345         .dma_zone_size  = SZ_128M,
 346         .restart        = da8xx_restart,
 347         .reserve        = da8xx_rproc_reserve_cma,
 348 MACHINE_END