include/linux/usb/renesas_usbhs.h

   1 // SPDX-License-Identifier: GPL-1.0+
   2 /*
   3  * Renesas USB
   4  *
   5  * Copyright (C) 2011 Renesas Solutions Corp.
   6  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  16  *
  17  */
  18 #ifndef RENESAS_USB_H
  19 #define RENESAS_USB_H
  20 #include <linux/notifier.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/usb/ch9.h>
  23
  24 /*
  25  * module type
  26  *
  27  * it will be return value from get_id
  28  */
  29 enum {
  30         USBHS_HOST = 0,
  31         USBHS_GADGET,
  32         USBHS_MAX,
  33 };
  34
  35 /*
  36  * callback functions table for driver
  37  *
  38  * These functions are called from platform for driver.
  39  * Callback function's pointer will be set before
  40  * renesas_usbhs_platform_callback :: hardware_init was called
  41  */
  42 struct renesas_usbhs_driver_callback {
  43         int (*notify_hotplug)(struct platform_device *pdev);
  44 };
  45
  46 /*
  47  * callback functions for platform
  48  *
  49  * These functions are called from driver for platform
  50  */
  51 struct renesas_usbhs_platform_callback {
  52
  53         /*
  54          * option:
  55          *
  56          * Hardware init function for platform.
  57          * it is called when driver was probed.
  58          */
  59         int (*hardware_init)(struct platform_device *pdev);
  60
  61         /*
  62          * option:
  63          *
  64          * Hardware exit function for platform.
  65          * it is called when driver was removed
  66          */
  67         int (*hardware_exit)(struct platform_device *pdev);
  68
  69         /*
  70          * option:
  71          *
  72          * for board specific clock control
  73          */
  74         int (*power_ctrl)(struct platform_device *pdev,
  75                            void __iomem *base, int enable);
  76
  77         /*
  78          * option:
  79          *
  80          * Phy reset for platform
  81          */
  82         int (*phy_reset)(struct platform_device *pdev);
  83
  84         /*
  85          * get USB ID function
  86          *  - USBHS_HOST
  87          *  - USBHS_GADGET
  88          */
  89         int (*get_id)(struct platform_device *pdev);
  90
  91         /*
  92          * get VBUS status function.
  93          */
  94         int (*get_vbus)(struct platform_device *pdev);
  95
  96         /*
  97          * option:
  98          *
  99          * VBUS control is needed for Host
 100          */
 101         int (*set_vbus)(struct platform_device *pdev, int enable);
 102
 103         /*
 104          * option:
 105          * extcon notifier to set host/peripheral mode.
 106          */
 107         int (*notifier)(struct notifier_block *nb, unsigned long event,
 108                         void *data);
 109 };
 110
 111 /*
 112  * parameters for renesas usbhs
 113  *
 114  * some register needs USB chip specific parameters.
 115  * This struct show it to driver
 116  */
 117
 118 struct renesas_usbhs_driver_pipe_config {
 119         u8 type;        /* USB_ENDPOINT_XFER_xxx */
 120         u16 bufsize;
 121         u8 bufnum;
 122         bool double_buf;
 123 };
 124 #define RENESAS_USBHS_PIPE(_type, _size, _num, _double_buf)     {       \
 125                         .type = (_type),                \
 126                         .bufsize = (_size),             \
 127                         .bufnum = (_num),               \
 128                         .double_buf = (_double_buf),    \
 129         }
 130
 131 struct renesas_usbhs_driver_param {
 132         /*
 133          * pipe settings
 134          */
 135         struct renesas_usbhs_driver_pipe_config *pipe_configs;
 136         int pipe_size; /* pipe_configs array size */
 137
 138         /*
 139          * option:
 140          *
 141          * for BUSWAIT :: BWAIT
 142          * see
 143          *      renesas_usbhs/common.c :: usbhsc_set_buswait()
 144          * */
 145         int buswait_bwait;
 146
 147         /*
 148          * option:
 149          *
 150          * delay time from notify_hotplug callback
 151          */
 152         int detection_delay; /* msec */
 153
 154         /*
 155          * option:
 156          *
 157          * dma id for dmaengine
 158          * The data transfer direction on D0FIFO/D1FIFO should be
 159          * fixed for keeping consistency.
 160          * So, the platform id settings will be..
 161          *      .d0_tx_id = xx_TX,
 162          *      .d1_rx_id = xx_RX,
 163          * or
 164          *      .d1_tx_id = xx_TX,
 165          *      .d0_rx_id = xx_RX,
 166          */
 167         int d0_tx_id;
 168         int d0_rx_id;
 169         int d1_tx_id;
 170         int d1_rx_id;
 171         int d2_tx_id;
 172         int d2_rx_id;
 173         int d3_tx_id;
 174         int d3_rx_id;
 175
 176         /*
 177          * option:
 178          *
 179          * pio <--> dma border.
 180          */
 181         int pio_dma_border; /* default is 64byte */
 182
 183         uintptr_t type;
 184         u32 enable_gpio;
 185
 186         /*
 187          * option:
 188          */
 189         u32 has_otg:1; /* for controlling PWEN/EXTLP */
 190         u32 has_sudmac:1; /* for SUDMAC */
 191         u32 has_usb_dmac:1; /* for USB-DMAC */
 192 #define USBHS_USB_DMAC_XFER_SIZE        32      /* hardcode the xfer size */
 193 };
 194
 195 #define USBHS_TYPE_RCAR_GEN2            1
 196 #define USBHS_TYPE_RCAR_GEN3            2
 197 #define USBHS_TYPE_RCAR_GEN3_WITH_PLL   3
 198 #define USBHS_TYPE_RZA1                 4
 199
 200 /*
 201  * option:
 202  *
 203  * platform information for renesas_usbhs driver.
 204  */
 205 struct renesas_usbhs_platform_info {
 206         /*
 207          * option:
 208          *
 209          * platform set these functions before
 210          * call platform_add_devices if needed
 211          */
 212         struct renesas_usbhs_platform_callback  platform_callback;
 213
 214         /*
 215          * driver set these callback functions pointer.
 216          * platform can use it on callback functions
 217          */
 218         struct renesas_usbhs_driver_callback    driver_callback;
 219
 220         /*
 221          * option:
 222          *
 223          * driver use these param for some register
 224          */
 225         struct renesas_usbhs_driver_param       driver_param;
 226 };
 227
 228 /*
 229  * macro for platform
 230  */
 231 #define renesas_usbhs_get_info(pdev)\
 232         ((struct renesas_usbhs_platform_info *)(pdev)->dev.platform_data)
 233
 234 #define renesas_usbhs_call_notify_hotplug(pdev)                         \
 235         ({                                                              \
 236                 struct renesas_usbhs_driver_callback *dc;               \
 237                 dc = &(renesas_usbhs_get_info(pdev)->driver_callback);  \
 238                 if (dc && dc->notify_hotplug)                           \
 239                         dc->notify_hotplug(pdev);                       \
 240         })
 241 #endif /* RENESAS_USB_H */