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/interrupt.h>
  16 #include <linux/gpio.h>
  17 #include <linux/gpio/machine.h>
  18 #include <linux/platform_data/gpio-davinci.h>
  19 #include <linux/regulator/machine.h>
  20
  21 #include <asm/mach-types.h>
  22 #include <asm/mach/arch.h>
  23
  24 #include <mach/common.h>
  25 #include "cp_intc.h"
  26 #include <mach/da8xx.h>
  27 #include <mach/mux.h>
  28
  29 #define HAWKBOARD_PHY_ID                "davinci_mdio-0:07"
  30
  31 #define DA850_USB1_VBUS_PIN             GPIO_TO_PIN(2, 4)
  32 #define DA850_USB1_OC_PIN               GPIO_TO_PIN(6, 13)
  33
  34 static short omapl138_hawk_mii_pins[] __initdata = {
  35         DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
  36         DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
  37         DA850_MII_CRS, DA850_MII_RXCLK, DA850_MII_RXDV, DA850_MII_RXD_3,
  38         DA850_MII_RXD_2, DA850_MII_RXD_1, DA850_MII_RXD_0, DA850_MDIO_CLK,
  39         DA850_MDIO_D,
  40         -1
  41 };
  42
  43 static __init void omapl138_hawk_config_emac(void)
  44 {
  45         void __iomem *cfgchip3 = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG);
  46         int ret;
  47         u32 val;
  48         struct davinci_soc_info *soc_info = &davinci_soc_info;
  49
  50         val = __raw_readl(cfgchip3);
  51         val &= ~BIT(8);
  52         ret = davinci_cfg_reg_list(omapl138_hawk_mii_pins);
  53         if (ret) {
  54                 pr_warn("%s: CPGMAC/MII mux setup failed: %d\n", __func__, ret);
  55                 return;
  56         }
  57
  58         /* configure the CFGCHIP3 register for MII */
  59         __raw_writel(val, cfgchip3);
  60         pr_info("EMAC: MII PHY configured\n");
  61
  62         soc_info->emac_pdata->phy_id = HAWKBOARD_PHY_ID;
  63
  64         ret = da8xx_register_emac();
  65         if (ret)
  66                 pr_warn("%s: EMAC registration failed: %d\n", __func__, ret);
  67 }
  68
  69 /*
  70  * The following EDMA channels/slots are not being used by drivers (for
  71  * example: Timer, GPIO, UART events etc) on da850/omap-l138 EVM/Hawkboard,
  72  * hence they are being reserved for codecs on the DSP side.
  73  */
  74 static const s16 da850_dma0_rsv_chans[][2] = {
  75         /* (offset, number) */
  76         { 8,  6},
  77         {24,  4},
  78         {30,  2},
  79         {-1, -1}
  80 };
  81
  82 static const s16 da850_dma0_rsv_slots[][2] = {
  83         /* (offset, number) */
  84         { 8,  6},
  85         {24,  4},
  86         {30, 50},
  87         {-1, -1}
  88 };
  89
  90 static const s16 da850_dma1_rsv_chans[][2] = {
  91         /* (offset, number) */
  92         { 0, 28},
  93         {30,  2},
  94         {-1, -1}
  95 };
  96
  97 static const s16 da850_dma1_rsv_slots[][2] = {
  98         /* (offset, number) */
  99         { 0, 28},
 100         {30, 90},
 101         {-1, -1}
 102 };
 103
 104 static struct edma_rsv_info da850_edma_cc0_rsv = {
 105         .rsv_chans      = da850_dma0_rsv_chans,
 106         .rsv_slots      = da850_dma0_rsv_slots,
 107 };
 108
 109 static struct edma_rsv_info da850_edma_cc1_rsv = {
 110         .rsv_chans      = da850_dma1_rsv_chans,
 111         .rsv_slots      = da850_dma1_rsv_slots,
 112 };
 113
 114 static struct edma_rsv_info *da850_edma_rsv[2] = {
 115         &da850_edma_cc0_rsv,
 116         &da850_edma_cc1_rsv,
 117 };
 118
 119 static const short hawk_mmcsd0_pins[] = {
 120         DA850_MMCSD0_DAT_0, DA850_MMCSD0_DAT_1, DA850_MMCSD0_DAT_2,
 121         DA850_MMCSD0_DAT_3, DA850_MMCSD0_CLK, DA850_MMCSD0_CMD,
 122         DA850_GPIO3_12, DA850_GPIO3_13,
 123         -1
 124 };
 125
 126 #define DA850_HAWK_MMCSD_CD_PIN         GPIO_TO_PIN(3, 12)
 127 #define DA850_HAWK_MMCSD_WP_PIN         GPIO_TO_PIN(3, 13)
 128
 129 static struct gpiod_lookup_table mmc_gpios_table = {
 130         .dev_id = "da830-mmc.0",
 131         .table = {
 132                 GPIO_LOOKUP("davinci_gpio.0", DA850_HAWK_MMCSD_CD_PIN, "cd",
 133                             GPIO_ACTIVE_LOW),
 134                 GPIO_LOOKUP("davinci_gpio.0", DA850_HAWK_MMCSD_WP_PIN, "wp",
 135                             GPIO_ACTIVE_LOW),
 136         },
 137 };
 138
 139 static struct davinci_mmc_config da850_mmc_config = {
 140         .wires          = 4,
 141         .max_freq       = 50000000,
 142         .caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
 143 };
 144
 145 static __init void omapl138_hawk_mmc_init(void)
 146 {
 147         int ret;
 148
 149         ret = davinci_cfg_reg_list(hawk_mmcsd0_pins);
 150         if (ret) {
 151                 pr_warn("%s: MMC/SD0 mux setup failed: %d\n", __func__, ret);
 152                 return;
 153         }
 154
 155         gpiod_add_lookup_table(&mmc_gpios_table);
 156
 157         ret = da8xx_register_mmcsd0(&da850_mmc_config);
 158         if (ret) {
 159                 pr_warn("%s: MMC/SD0 registration failed: %d\n", __func__, ret);
 160                 goto mmc_setup_mmcsd_fail;
 161         }
 162
 163         return;
 164
 165 mmc_setup_mmcsd_fail:
 166         gpiod_remove_lookup_table(&mmc_gpios_table);
 167 }
 168
 169 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id);
 170 static da8xx_ocic_handler_t hawk_usb_ocic_handler;
 171
 172 static const short da850_hawk_usb11_pins[] = {
 173         DA850_GPIO2_4, DA850_GPIO6_13,
 174         -1
 175 };
 176
 177 static int hawk_usb_set_power(unsigned port, int on)
 178 {
 179         gpio_set_value(DA850_USB1_VBUS_PIN, on);
 180         return 0;
 181 }
 182
 183 static int hawk_usb_get_power(unsigned port)
 184 {
 185         return gpio_get_value(DA850_USB1_VBUS_PIN);
 186 }
 187
 188 static int hawk_usb_get_oci(unsigned port)
 189 {
 190         return !gpio_get_value(DA850_USB1_OC_PIN);
 191 }
 192
 193 static int hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)
 194 {
 195         int irq         = gpio_to_irq(DA850_USB1_OC_PIN);
 196         int error       = 0;
 197
 198         if (handler != NULL) {
 199                 hawk_usb_ocic_handler = handler;
 200
 201                 error = request_irq(irq, omapl138_hawk_usb_ocic_irq,
 202                                         IRQF_TRIGGER_RISING |
 203                                         IRQF_TRIGGER_FALLING,
 204                                         "OHCI over-current indicator", NULL);
 205                 if (error)
 206                         pr_err("%s: could not request IRQ to watch "
 207                                 "over-current indicator changes\n", __func__);
 208         } else {
 209                 free_irq(irq, NULL);
 210         }
 211         return error;
 212 }
 213
 214 static struct da8xx_ohci_root_hub omapl138_hawk_usb11_pdata = {
 215         .set_power      = hawk_usb_set_power,
 216         .get_power      = hawk_usb_get_power,
 217         .get_oci        = hawk_usb_get_oci,
 218         .ocic_notify    = hawk_usb_ocic_notify,
 219         /* TPS2087 switch @ 5V */
 220         .potpgt         = (3 + 1) / 2,  /* 3 ms max */
 221 };
 222
 223 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id)
 224 {
 225         hawk_usb_ocic_handler(&omapl138_hawk_usb11_pdata, 1);
 226         return IRQ_HANDLED;
 227 }
 228
 229 static __init void omapl138_hawk_usb_init(void)
 230 {
 231         int ret;
 232
 233         ret = davinci_cfg_reg_list(da850_hawk_usb11_pins);
 234         if (ret) {
 235                 pr_warn("%s: USB 1.1 PinMux setup failed: %d\n", __func__, ret);
 236                 return;
 237         }
 238
 239         ret = da8xx_register_usb20_phy_clk(false);
 240         if (ret)
 241                 pr_warn("%s: USB 2.0 PHY CLK registration failed: %d\n",
 242                         __func__, ret);
 243
 244         ret = da8xx_register_usb11_phy_clk(false);
 245         if (ret)
 246                 pr_warn("%s: USB 1.1 PHY CLK registration failed: %d\n",
 247                         __func__, ret);
 248
 249         ret = da8xx_register_usb_phy();
 250         if (ret)
 251                 pr_warn("%s: USB PHY registration failed: %d\n",
 252                         __func__, ret);
 253
 254         ret = gpio_request_one(DA850_USB1_VBUS_PIN,
 255                         GPIOF_DIR_OUT, "USB1 VBUS");
 256         if (ret < 0) {
 257                 pr_err("%s: failed to request GPIO for USB 1.1 port "
 258                         "power control: %d\n", __func__, ret);
 259                 return;
 260         }
 261
 262         ret = gpio_request_one(DA850_USB1_OC_PIN,
 263                         GPIOF_DIR_IN, "USB1 OC");
 264         if (ret < 0) {
 265                 pr_err("%s: failed to request GPIO for USB 1.1 port "
 266                         "over-current indicator: %d\n", __func__, ret);
 267                 goto usb11_setup_oc_fail;
 268         }
 269
 270         ret = da8xx_register_usb11(&omapl138_hawk_usb11_pdata);
 271         if (ret) {
 272                 pr_warn("%s: USB 1.1 registration failed: %d\n", __func__, ret);
 273                 goto usb11_setup_fail;
 274         }
 275
 276         return;
 277
 278 usb11_setup_fail:
 279         gpio_free(DA850_USB1_OC_PIN);
 280 usb11_setup_oc_fail:
 281         gpio_free(DA850_USB1_VBUS_PIN);
 282 }
 283
 284 static __init void omapl138_hawk_init(void)
 285 {
 286         int ret;
 287
 288         ret = da850_register_gpio();
 289         if (ret)
 290                 pr_warn("%s: GPIO init failed: %d\n", __func__, ret);
 291
 292         davinci_serial_init(da8xx_serial_device);
 293
 294         omapl138_hawk_config_emac();
 295
 296         ret = da850_register_edma(da850_edma_rsv);
 297         if (ret)
 298                 pr_warn("%s: EDMA registration failed: %d\n", __func__, ret);
 299
 300         omapl138_hawk_mmc_init();
 301
 302         omapl138_hawk_usb_init();
 303
 304         ret = da8xx_register_watchdog();
 305         if (ret)
 306                 pr_warn("%s: watchdog registration failed: %d\n",
 307                         __func__, ret);
 308
 309         ret = da8xx_register_rproc();
 310         if (ret)
 311                 pr_warn("%s: dsp/rproc registration failed: %d\n",
 312                         __func__, ret);
 313
 314         regulator_has_full_constraints();
 315 }
 316
 317 #ifdef CONFIG_SERIAL_8250_CONSOLE
 318 static int __init omapl138_hawk_console_init(void)
 319 {
 320         if (!machine_is_omapl138_hawkboard())
 321                 return 0;
 322
 323         return add_preferred_console("ttyS", 2, "115200");
 324 }
 325 console_initcall(omapl138_hawk_console_init);
 326 #endif
 327
 328 static void __init omapl138_hawk_map_io(void)
 329 {
 330         da850_init();
 331 }
 332
 333 MACHINE_START(OMAPL138_HAWKBOARD, "AM18x/OMAP-L138 Hawkboard")
 334         .atag_offset    = 0x100,
 335         .map_io         = omapl138_hawk_map_io,
 336         .init_irq       = cp_intc_init,
 337         .init_time      = da850_init_time,
 338         .init_machine   = omapl138_hawk_init,
 339         .init_late      = davinci_init_late,
 340         .dma_zone_size  = SZ_128M,
 341         .reserve        = da8xx_rproc_reserve_cma,
 342 MACHINE_END