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
  17 #include <asm/mach-types.h>
  18 #include <asm/mach/arch.h>
  19
  20 #include <mach/cp_intc.h>
  21 #include <mach/da8xx.h>
  22 #include <mach/mux.h>
  23
  24 #define HAWKBOARD_PHY_ID                "davinci_mdio-0:07"
  25 #define DA850_HAWK_MMCSD_CD_PIN         GPIO_TO_PIN(3, 12)
  26 #define DA850_HAWK_MMCSD_WP_PIN         GPIO_TO_PIN(3, 13)
  27
  28 #define DA850_USB1_VBUS_PIN             GPIO_TO_PIN(2, 4)
  29 #define DA850_USB1_OC_PIN               GPIO_TO_PIN(6, 13)
  30
  31 static short omapl138_hawk_mii_pins[] __initdata = {
  32         DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
  33         DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
  34         DA850_MII_CRS, DA850_MII_RXCLK, DA850_MII_RXDV, DA850_MII_RXD_3,
  35         DA850_MII_RXD_2, DA850_MII_RXD_1, DA850_MII_RXD_0, DA850_MDIO_CLK,
  36         DA850_MDIO_D,
  37         -1
  38 };
  39
  40 static __init void omapl138_hawk_config_emac(void)
  41 {
  42         void __iomem *cfgchip3 = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG);
  43         int ret;
  44         u32 val;
  45         struct davinci_soc_info *soc_info = &davinci_soc_info;
  46
  47         val = __raw_readl(cfgchip3);
  48         val &= ~BIT(8);
  49         ret = davinci_cfg_reg_list(omapl138_hawk_mii_pins);
  50         if (ret) {
  51                 pr_warn("%s: CPGMAC/MII mux setup failed: %d\n", __func__, ret);
  52                 return;
  53         }
  54
  55         /* configure the CFGCHIP3 register for MII */
  56         __raw_writel(val, cfgchip3);
  57         pr_info("EMAC: MII PHY configured\n");
  58
  59         soc_info->emac_pdata->phy_id = HAWKBOARD_PHY_ID;
  60
  61         ret = da8xx_register_emac();
  62         if (ret)
  63                 pr_warn("%s: EMAC registration failed: %d\n", __func__, ret);
  64 }
  65
  66 /*
  67  * The following EDMA channels/slots are not being used by drivers (for
  68  * example: Timer, GPIO, UART events etc) on da850/omap-l138 EVM/Hawkboard,
  69  * hence they are being reserved for codecs on the DSP side.
  70  */
  71 static const s16 da850_dma0_rsv_chans[][2] = {
  72         /* (offset, number) */
  73         { 8,  6},
  74         {24,  4},
  75         {30,  2},
  76         {-1, -1}
  77 };
  78
  79 static const s16 da850_dma0_rsv_slots[][2] = {
  80         /* (offset, number) */
  81         { 8,  6},
  82         {24,  4},
  83         {30, 50},
  84         {-1, -1}
  85 };
  86
  87 static const s16 da850_dma1_rsv_chans[][2] = {
  88         /* (offset, number) */
  89         { 0, 28},
  90         {30,  2},
  91         {-1, -1}
  92 };
  93
  94 static const s16 da850_dma1_rsv_slots[][2] = {
  95         /* (offset, number) */
  96         { 0, 28},
  97         {30, 90},
  98         {-1, -1}
  99 };
 100
 101 static struct edma_rsv_info da850_edma_cc0_rsv = {
 102         .rsv_chans      = da850_dma0_rsv_chans,
 103         .rsv_slots      = da850_dma0_rsv_slots,
 104 };
 105
 106 static struct edma_rsv_info da850_edma_cc1_rsv = {
 107         .rsv_chans      = da850_dma1_rsv_chans,
 108         .rsv_slots      = da850_dma1_rsv_slots,
 109 };
 110
 111 static struct edma_rsv_info *da850_edma_rsv[2] = {
 112         &da850_edma_cc0_rsv,
 113         &da850_edma_cc1_rsv,
 114 };
 115
 116 static const short hawk_mmcsd0_pins[] = {
 117         DA850_MMCSD0_DAT_0, DA850_MMCSD0_DAT_1, DA850_MMCSD0_DAT_2,
 118         DA850_MMCSD0_DAT_3, DA850_MMCSD0_CLK, DA850_MMCSD0_CMD,
 119         DA850_GPIO3_12, DA850_GPIO3_13,
 120         -1
 121 };
 122
 123 static int da850_hawk_mmc_get_ro(int index)
 124 {
 125         return gpio_get_value(DA850_HAWK_MMCSD_WP_PIN);
 126 }
 127
 128 static int da850_hawk_mmc_get_cd(int index)
 129 {
 130         return !gpio_get_value(DA850_HAWK_MMCSD_CD_PIN);
 131 }
 132
 133 static struct davinci_mmc_config da850_mmc_config = {
 134         .get_ro         = da850_hawk_mmc_get_ro,
 135         .get_cd         = da850_hawk_mmc_get_cd,
 136         .wires          = 4,
 137         .max_freq       = 50000000,
 138         .caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
 139         .version        = MMC_CTLR_VERSION_2,
 140 };
 141
 142 static __init void omapl138_hawk_mmc_init(void)
 143 {
 144         int ret;
 145
 146         ret = davinci_cfg_reg_list(hawk_mmcsd0_pins);
 147         if (ret) {
 148                 pr_warn("%s: MMC/SD0 mux setup failed: %d\n", __func__, ret);
 149                 return;
 150         }
 151
 152         ret = gpio_request_one(DA850_HAWK_MMCSD_CD_PIN,
 153                         GPIOF_DIR_IN, "MMC CD");
 154         if (ret < 0) {
 155                 pr_warn("%s: can not open GPIO %d\n",
 156                         __func__, DA850_HAWK_MMCSD_CD_PIN);
 157                 return;
 158         }
 159
 160         ret = gpio_request_one(DA850_HAWK_MMCSD_WP_PIN,
 161                         GPIOF_DIR_IN, "MMC WP");
 162         if (ret < 0) {
 163                 pr_warn("%s: can not open GPIO %d\n",
 164                         __func__, DA850_HAWK_MMCSD_WP_PIN);
 165                 goto mmc_setup_wp_fail;
 166         }
 167
 168         ret = da8xx_register_mmcsd0(&da850_mmc_config);
 169         if (ret) {
 170                 pr_warn("%s: MMC/SD0 registration failed: %d\n", __func__, ret);
 171                 goto mmc_setup_mmcsd_fail;
 172         }
 173
 174         return;
 175
 176 mmc_setup_mmcsd_fail:
 177         gpio_free(DA850_HAWK_MMCSD_WP_PIN);
 178 mmc_setup_wp_fail:
 179         gpio_free(DA850_HAWK_MMCSD_CD_PIN);
 180 }
 181
 182 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id);
 183 static da8xx_ocic_handler_t hawk_usb_ocic_handler;
 184
 185 static const short da850_hawk_usb11_pins[] = {
 186         DA850_GPIO2_4, DA850_GPIO6_13,
 187         -1
 188 };
 189
 190 static int hawk_usb_set_power(unsigned port, int on)
 191 {
 192         gpio_set_value(DA850_USB1_VBUS_PIN, on);
 193         return 0;
 194 }
 195
 196 static int hawk_usb_get_power(unsigned port)
 197 {
 198         return gpio_get_value(DA850_USB1_VBUS_PIN);
 199 }
 200
 201 static int hawk_usb_get_oci(unsigned port)
 202 {
 203         return !gpio_get_value(DA850_USB1_OC_PIN);
 204 }
 205
 206 static int hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)
 207 {
 208         int irq         = gpio_to_irq(DA850_USB1_OC_PIN);
 209         int error       = 0;
 210
 211         if (handler != NULL) {
 212                 hawk_usb_ocic_handler = handler;
 213
 214                 error = request_irq(irq, omapl138_hawk_usb_ocic_irq,
 215                                         IRQF_DISABLED | IRQF_TRIGGER_RISING |
 216                                         IRQF_TRIGGER_FALLING,
 217                                         "OHCI over-current indicator", NULL);
 218                 if (error)
 219                         pr_err("%s: could not request IRQ to watch "
 220                                 "over-current indicator changes\n", __func__);
 221         } else {
 222                 free_irq(irq, NULL);
 223         }
 224         return error;
 225 }
 226
 227 static struct da8xx_ohci_root_hub omapl138_hawk_usb11_pdata = {
 228         .set_power      = hawk_usb_set_power,
 229         .get_power      = hawk_usb_get_power,
 230         .get_oci        = hawk_usb_get_oci,
 231         .ocic_notify    = hawk_usb_ocic_notify,
 232         /* TPS2087 switch @ 5V */
 233         .potpgt         = (3 + 1) / 2,  /* 3 ms max */
 234 };
 235
 236 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id)
 237 {
 238         hawk_usb_ocic_handler(&omapl138_hawk_usb11_pdata, 1);
 239         return IRQ_HANDLED;
 240 }
 241
 242 static __init void omapl138_hawk_usb_init(void)
 243 {
 244         int ret;
 245         u32 cfgchip2;
 246
 247         ret = davinci_cfg_reg_list(da850_hawk_usb11_pins);
 248         if (ret) {
 249                 pr_warn("%s: USB 1.1 PinMux setup failed: %d\n", __func__, ret);
 250                 return;
 251         }
 252
 253         /* Setup the Ref. clock frequency for the HAWK at 24 MHz. */
 254
 255         cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
 256         cfgchip2 &= ~CFGCHIP2_REFFREQ;
 257         cfgchip2 |=  CFGCHIP2_REFFREQ_24MHZ;
 258         __raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
 259
 260         ret = gpio_request_one(DA850_USB1_VBUS_PIN,
 261                         GPIOF_DIR_OUT, "USB1 VBUS");
 262         if (ret < 0) {
 263                 pr_err("%s: failed to request GPIO for USB 1.1 port "
 264                         "power control: %d\n", __func__, ret);
 265                 return;
 266         }
 267
 268         ret = gpio_request_one(DA850_USB1_OC_PIN,
 269                         GPIOF_DIR_IN, "USB1 OC");
 270         if (ret < 0) {
 271                 pr_err("%s: failed to request GPIO for USB 1.1 port "
 272                         "over-current indicator: %d\n", __func__, ret);
 273                 goto usb11_setup_oc_fail;
 274         }
 275
 276         ret = da8xx_register_usb11(&omapl138_hawk_usb11_pdata);
 277         if (ret) {
 278                 pr_warn("%s: USB 1.1 registration failed: %d\n", __func__, ret);
 279                 goto usb11_setup_fail;
 280         }
 281
 282         return;
 283
 284 usb11_setup_fail:
 285         gpio_free(DA850_USB1_OC_PIN);
 286 usb11_setup_oc_fail:
 287         gpio_free(DA850_USB1_VBUS_PIN);
 288 }
 289
 290 static struct davinci_uart_config omapl138_hawk_uart_config __initdata = {
 291         .enabled_uarts = 0x7,
 292 };
 293
 294 static __init void omapl138_hawk_init(void)
 295 {
 296         int ret;
 297
 298         davinci_serial_init(&omapl138_hawk_uart_config);
 299
 300         omapl138_hawk_config_emac();
 301
 302         ret = da850_register_edma(da850_edma_rsv);
 303         if (ret)
 304                 pr_warn("%s: EDMA registration failed: %d\n", __func__, ret);
 305
 306         omapl138_hawk_mmc_init();
 307
 308         omapl138_hawk_usb_init();
 309
 310         ret = da8xx_register_watchdog();
 311         if (ret)
 312                 pr_warn("%s: watchdog registration failed: %d\n",
 313                         __func__, ret);
 314 }
 315
 316 #ifdef CONFIG_SERIAL_8250_CONSOLE
 317 static int __init omapl138_hawk_console_init(void)
 318 {
 319         if (!machine_is_omapl138_hawkboard())
 320                 return 0;
 321
 322         return add_preferred_console("ttyS", 2, "115200");
 323 }
 324 console_initcall(omapl138_hawk_console_init);
 325 #endif
 326
 327 static void __init omapl138_hawk_map_io(void)
 328 {
 329         da850_init();
 330 }
 331
 332 MACHINE_START(OMAPL138_HAWKBOARD, "AM18x/OMAP-L138 Hawkboard")
 333         .atag_offset    = 0x100,
 334         .map_io         = omapl138_hawk_map_io,
 335         .init_irq       = cp_intc_init,
 336         .init_time      = davinci_timer_init,
 337         .init_machine   = omapl138_hawk_init,
 338         .init_late      = davinci_init_late,
 339         .dma_zone_size  = SZ_128M,
 340         .restart        = da8xx_restart,
 341 MACHINE_END