drivers/usb/gadget/r8a66597-udc.h

   1 /*
   2  * R8A66597 UDC
   3  *
   4  * Copyright (C) 2007-2009 Renesas Solutions Corp.
   5  *
   6  * Author : Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; version 2 of the License.
  11  */
  12
  13 #ifndef __R8A66597_H__
  14 #define __R8A66597_H__
  15
  16 #ifdef CONFIG_HAVE_CLK
  17 #include <linux/clk.h>
  18 #endif
  19
  20 #include <linux/usb/r8a66597.h>
  21
  22 #define R8A66597_MAX_SAMPLING   10
  23
  24 #define R8A66597_MAX_NUM_PIPE   8
  25 #define R8A66597_MAX_NUM_BULK   3
  26 #define R8A66597_MAX_NUM_ISOC   2
  27 #define R8A66597_MAX_NUM_INT    2
  28
  29 #define R8A66597_BASE_PIPENUM_BULK      3
  30 #define R8A66597_BASE_PIPENUM_ISOC      1
  31 #define R8A66597_BASE_PIPENUM_INT       6
  32
  33 #define R8A66597_BASE_BUFNUM    6
  34 #define R8A66597_MAX_BUFNUM     0x4F
  35
  36 #define is_bulk_pipe(pipenum)   \
  37         ((pipenum >= R8A66597_BASE_PIPENUM_BULK) && \
  38          (pipenum < (R8A66597_BASE_PIPENUM_BULK + R8A66597_MAX_NUM_BULK)))
  39 #define is_interrupt_pipe(pipenum)      \
  40         ((pipenum >= R8A66597_BASE_PIPENUM_INT) && \
  41          (pipenum < (R8A66597_BASE_PIPENUM_INT + R8A66597_MAX_NUM_INT)))
  42 #define is_isoc_pipe(pipenum)   \
  43         ((pipenum >= R8A66597_BASE_PIPENUM_ISOC) && \
  44          (pipenum < (R8A66597_BASE_PIPENUM_ISOC + R8A66597_MAX_NUM_ISOC)))
  45
  46 #define r8a66597_is_sudmac(r8a66597)    (r8a66597->pdata->sudmac)
  47 struct r8a66597_pipe_info {
  48         u16     pipe;
  49         u16     epnum;
  50         u16     maxpacket;
  51         u16     type;
  52         u16     interval;
  53         u16     dir_in;
  54 };
  55
  56 struct r8a66597_request {
  57         struct usb_request      req;
  58         struct list_head        queue;
  59 };
  60
  61 struct r8a66597_ep {
  62         struct usb_ep           ep;
  63         struct r8a66597         *r8a66597;
  64         struct r8a66597_dma     *dma;
  65
  66         struct list_head        queue;
  67         unsigned                busy:1;
  68         unsigned                wedge:1;
  69         unsigned                internal_ccpl:1;        /* use only control */
  70
  71         /* this member can able to after r8a66597_enable */
  72         unsigned                use_dma:1;
  73         u16                     pipenum;
  74         u16                     type;
  75         const struct usb_endpoint_descriptor    *desc;
  76         /* register address */
  77         unsigned char           fifoaddr;
  78         unsigned char           fifosel;
  79         unsigned char           fifoctr;
  80         unsigned char           pipectr;
  81         unsigned char           pipetre;
  82         unsigned char           pipetrn;
  83 };
  84
  85 struct r8a66597_dma {
  86         unsigned                used:1;
  87         unsigned                dir:1;  /* 1 = IN(write), 0 = OUT(read) */
  88 };
  89
  90 struct r8a66597 {
  91         spinlock_t              lock;
  92         void __iomem            *reg;
  93         void __iomem            *sudmac_reg;
  94
  95 #ifdef CONFIG_HAVE_CLK
  96         struct clk *clk;
  97 #endif
  98         struct r8a66597_platdata        *pdata;
  99
 100         struct usb_gadget               gadget;
 101         struct usb_gadget_driver        *driver;
 102
 103         struct r8a66597_ep      ep[R8A66597_MAX_NUM_PIPE];
 104         struct r8a66597_ep      *pipenum2ep[R8A66597_MAX_NUM_PIPE];
 105         struct r8a66597_ep      *epaddr2ep[16];
 106         struct r8a66597_dma     dma;
 107
 108         struct timer_list       timer;
 109         struct usb_request      *ep0_req;       /* for internal request */
 110         u16                     ep0_data;       /* for internal request */
 111         u16                     old_vbus;
 112         u16                     scount;
 113         u16                     old_dvsq;
 114
 115         /* pipe config */
 116         unsigned char bulk;
 117         unsigned char interrupt;
 118         unsigned char isochronous;
 119         unsigned char num_dma;
 120
 121         unsigned irq_sense_low:1;
 122 };
 123
 124 #define gadget_to_r8a66597(_gadget)     \
 125                 container_of(_gadget, struct r8a66597, gadget)
 126 #define r8a66597_to_gadget(r8a66597) (&r8a66597->gadget)
 127 #define r8a66597_to_dev(r8a66597)       (r8a66597->gadget.dev.parent)
 128
 129 static inline u16 r8a66597_read(struct r8a66597 *r8a66597, unsigned long offset)
 130 {
 131         return ioread16(r8a66597->reg + offset);
 132 }
 133
 134 static inline void r8a66597_read_fifo(struct r8a66597 *r8a66597,
 135                                       unsigned long offset,
 136                                       unsigned char *buf,
 137                                       int len)
 138 {
 139         void __iomem *fifoaddr = r8a66597->reg + offset;
 140         unsigned int data = 0;
 141         int i;
 142
 143         if (r8a66597->pdata->on_chip) {
 144                 /* 32-bit accesses for on_chip controllers */
 145
 146                 /* aligned buf case */
 147                 if (len >= 4 && !((unsigned long)buf & 0x03)) {
 148                         ioread32_rep(fifoaddr, buf, len / 4);
 149                         buf += len & ~0x03;
 150                         len &= 0x03;
 151                 }
 152
 153                 /* unaligned buf case */
 154                 for (i = 0; i < len; i++) {
 155                         if (!(i & 0x03))
 156                                 data = ioread32(fifoaddr);
 157
 158                         buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
 159                 }
 160         } else {
 161                 /* 16-bit accesses for external controllers */
 162
 163                 /* aligned buf case */
 164                 if (len >= 2 && !((unsigned long)buf & 0x01)) {
 165                         ioread16_rep(fifoaddr, buf, len / 2);
 166                         buf += len & ~0x01;
 167                         len &= 0x01;
 168                 }
 169
 170                 /* unaligned buf case */
 171                 for (i = 0; i < len; i++) {
 172                         if (!(i & 0x01))
 173                                 data = ioread16(fifoaddr);
 174
 175                         buf[i] = (data >> ((i & 0x01) * 8)) & 0xff;
 176                 }
 177         }
 178 }
 179
 180 static inline void r8a66597_write(struct r8a66597 *r8a66597, u16 val,
 181                                   unsigned long offset)
 182 {
 183         iowrite16(val, r8a66597->reg + offset);
 184 }
 185
 186 static inline void r8a66597_mdfy(struct r8a66597 *r8a66597,
 187                                  u16 val, u16 pat, unsigned long offset)
 188 {
 189         u16 tmp;
 190         tmp = r8a66597_read(r8a66597, offset);
 191         tmp = tmp & (~pat);
 192         tmp = tmp | val;
 193         r8a66597_write(r8a66597, tmp, offset);
 194 }
 195
 196 #define r8a66597_bclr(r8a66597, val, offset)    \
 197                         r8a66597_mdfy(r8a66597, 0, val, offset)
 198 #define r8a66597_bset(r8a66597, val, offset)    \
 199                         r8a66597_mdfy(r8a66597, val, 0, offset)
 200
 201 static inline void r8a66597_write_fifo(struct r8a66597 *r8a66597,
 202                                        struct r8a66597_ep *ep,
 203                                        unsigned char *buf,
 204                                        int len)
 205 {
 206         void __iomem *fifoaddr = r8a66597->reg + ep->fifoaddr;
 207         int adj = 0;
 208         int i;
 209
 210         if (r8a66597->pdata->on_chip) {
 211                 /* 32-bit access only if buf is 32-bit aligned */
 212                 if (len >= 4 && !((unsigned long)buf & 0x03)) {
 213                         iowrite32_rep(fifoaddr, buf, len / 4);
 214                         buf += len & ~0x03;
 215                         len &= 0x03;
 216                 }
 217         } else {
 218                 /* 16-bit access only if buf is 16-bit aligned */
 219                 if (len >= 2 && !((unsigned long)buf & 0x01)) {
 220                         iowrite16_rep(fifoaddr, buf, len / 2);
 221                         buf += len & ~0x01;
 222                         len &= 0x01;
 223                 }
 224         }
 225
 226         /* adjust fifo address in the little endian case */
 227         if (!(r8a66597_read(r8a66597, CFIFOSEL) & BIGEND)) {
 228                 if (r8a66597->pdata->on_chip)
 229                         adj = 0x03; /* 32-bit wide */
 230                 else
 231                         adj = 0x01; /* 16-bit wide */
 232         }
 233
 234         if (r8a66597->pdata->wr0_shorted_to_wr1)
 235                 r8a66597_bclr(r8a66597, MBW_16, ep->fifosel);
 236         for (i = 0; i < len; i++)
 237                 iowrite8(buf[i], fifoaddr + adj - (i & adj));
 238         if (r8a66597->pdata->wr0_shorted_to_wr1)
 239                 r8a66597_bclr(r8a66597, MBW_16, ep->fifosel);
 240 }
 241
 242 static inline u16 get_xtal_from_pdata(struct r8a66597_platdata *pdata)
 243 {
 244         u16 clock = 0;
 245
 246         switch (pdata->xtal) {
 247         case R8A66597_PLATDATA_XTAL_12MHZ:
 248                 clock = XTAL12;
 249                 break;
 250         case R8A66597_PLATDATA_XTAL_24MHZ:
 251                 clock = XTAL24;
 252                 break;
 253         case R8A66597_PLATDATA_XTAL_48MHZ:
 254                 clock = XTAL48;
 255                 break;
 256         default:
 257                 printk(KERN_ERR "r8a66597: platdata clock is wrong.\n");
 258                 break;
 259         }
 260
 261         return clock;
 262 }
 263
 264 static inline u32 r8a66597_sudmac_read(struct r8a66597 *r8a66597,
 265                                        unsigned long offset)
 266 {
 267         return ioread32(r8a66597->sudmac_reg + offset);
 268 }
 269
 270 static inline void r8a66597_sudmac_write(struct r8a66597 *r8a66597, u32 val,
 271                                          unsigned long offset)
 272 {
 273         iowrite32(val, r8a66597->sudmac_reg + offset);
 274 }
 275
 276 #define get_pipectr_addr(pipenum)       (PIPE1CTR + (pipenum - 1) * 2)
 277 #define get_pipetre_addr(pipenum)       (PIPE1TRE + (pipenum - 1) * 4)
 278 #define get_pipetrn_addr(pipenum)       (PIPE1TRN + (pipenum - 1) * 4)
 279
 280 #define enable_irq_ready(r8a66597, pipenum)     \
 281         enable_pipe_irq(r8a66597, pipenum, BRDYENB)
 282 #define disable_irq_ready(r8a66597, pipenum)    \
 283         disable_pipe_irq(r8a66597, pipenum, BRDYENB)
 284 #define enable_irq_empty(r8a66597, pipenum)     \
 285         enable_pipe_irq(r8a66597, pipenum, BEMPENB)
 286 #define disable_irq_empty(r8a66597, pipenum)    \
 287         disable_pipe_irq(r8a66597, pipenum, BEMPENB)
 288 #define enable_irq_nrdy(r8a66597, pipenum)      \
 289         enable_pipe_irq(r8a66597, pipenum, NRDYENB)
 290 #define disable_irq_nrdy(r8a66597, pipenum)     \
 291         disable_pipe_irq(r8a66597, pipenum, NRDYENB)
 292
 293 #endif  /* __R8A66597_H__ */
 294