drivers/misc/pch_phub.c

   1 /*
   2  * Copyright (C) 2011 LAPIS Semiconductor Co., Ltd.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/types.h>
  21 #include <linux/fs.h>
  22 #include <linux/uaccess.h>
  23 #include <linux/string.h>
  24 #include <linux/pci.h>
  25 #include <linux/io.h>
  26 #include <linux/delay.h>
  27 #include <linux/mutex.h>
  28 #include <linux/if_ether.h>
  29 #include <linux/ctype.h>
  30 #include <linux/dmi.h>
  31
  32 #define PHUB_STATUS 0x00                /* Status Register offset */
  33 #define PHUB_CONTROL 0x04               /* Control Register offset */
  34 #define PHUB_TIMEOUT 0x05               /* Time out value for Status Register */
  35 #define PCH_PHUB_ROM_WRITE_ENABLE 0x01  /* Enabling for writing ROM */
  36 #define PCH_PHUB_ROM_WRITE_DISABLE 0x00 /* Disabling for writing ROM */
  37 #define PCH_PHUB_MAC_START_ADDR_EG20T 0x14  /* MAC data area start address
  38                                                offset */
  39 #define PCH_PHUB_MAC_START_ADDR_ML7223 0x20C  /* MAC data area start address
  40                                                  offset */
  41 #define PCH_PHUB_ROM_START_ADDR_EG20T 0x80 /* ROM data area start address offset
  42                                               (Intel EG20T PCH)*/
  43 #define PCH_PHUB_ROM_START_ADDR_ML7213 0x400 /* ROM data area start address
  44                                                 offset(LAPIS Semicon ML7213)
  45                                               */
  46 #define PCH_PHUB_ROM_START_ADDR_ML7223 0x400 /* ROM data area start address
  47                                                 offset(LAPIS Semicon ML7223)
  48                                               */
  49
  50 /* MAX number of INT_REDUCE_CONTROL registers */
  51 #define MAX_NUM_INT_REDUCE_CONTROL_REG 128
  52 #define PCI_DEVICE_ID_PCH1_PHUB 0x8801
  53 #define PCH_MINOR_NOS 1
  54 #define CLKCFG_CAN_50MHZ 0x12000000
  55 #define CLKCFG_CANCLK_MASK 0xFF000000
  56 #define CLKCFG_UART_MASK                        0xFFFFFF
  57
  58 /* CM-iTC */
  59 #define CLKCFG_UART_48MHZ                       (1 << 16)
  60 #define CLKCFG_BAUDDIV                          (2 << 20)
  61 #define CLKCFG_PLL2VCO                          (8 << 9)
  62 #define CLKCFG_UARTCLKSEL                       (1 << 18)
  63
  64 /* Macros for ML7213 */
  65 #define PCI_VENDOR_ID_ROHM                      0x10db
  66 #define PCI_DEVICE_ID_ROHM_ML7213_PHUB          0x801A
  67
  68 /* Macros for ML7223 */
  69 #define PCI_DEVICE_ID_ROHM_ML7223_mPHUB 0x8012 /* for Bus-m */
  70 #define PCI_DEVICE_ID_ROHM_ML7223_nPHUB 0x8002 /* for Bus-n */
  71
  72 /* Macros for ML7831 */
  73 #define PCI_DEVICE_ID_ROHM_ML7831_PHUB 0x8801
  74
  75 /* SROM ACCESS Macro */
  76 #define PCH_WORD_ADDR_MASK (~((1 << 2) - 1))
  77
  78 /* Registers address offset */
  79 #define PCH_PHUB_ID_REG                         0x0000
  80 #define PCH_PHUB_QUEUE_PRI_VAL_REG              0x0004
  81 #define PCH_PHUB_RC_QUEUE_MAXSIZE_REG           0x0008
  82 #define PCH_PHUB_BRI_QUEUE_MAXSIZE_REG          0x000C
  83 #define PCH_PHUB_COMP_RESP_TIMEOUT_REG          0x0010
  84 #define PCH_PHUB_BUS_SLAVE_CONTROL_REG          0x0014
  85 #define PCH_PHUB_DEADLOCK_AVOID_TYPE_REG        0x0018
  86 #define PCH_PHUB_INTPIN_REG_WPERMIT_REG0        0x0020
  87 #define PCH_PHUB_INTPIN_REG_WPERMIT_REG1        0x0024
  88 #define PCH_PHUB_INTPIN_REG_WPERMIT_REG2        0x0028
  89 #define PCH_PHUB_INTPIN_REG_WPERMIT_REG3        0x002C
  90 #define PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE    0x0040
  91 #define CLKCFG_REG_OFFSET                       0x500
  92 #define FUNCSEL_REG_OFFSET                      0x508
  93
  94 #define PCH_PHUB_OROM_SIZE 15360
  95
  96 /**
  97  * struct pch_phub_reg - PHUB register structure
  98  * @phub_id_reg:                        PHUB_ID register val
  99  * @q_pri_val_reg:                      QUEUE_PRI_VAL register val
 100  * @rc_q_maxsize_reg:                   RC_QUEUE_MAXSIZE register val
 101  * @bri_q_maxsize_reg:                  BRI_QUEUE_MAXSIZE register val
 102  * @comp_resp_timeout_reg:              COMP_RESP_TIMEOUT register val
 103  * @bus_slave_control_reg:              BUS_SLAVE_CONTROL_REG register val
 104  * @deadlock_avoid_type_reg:            DEADLOCK_AVOID_TYPE register val
 105  * @intpin_reg_wpermit_reg0:            INTPIN_REG_WPERMIT register 0 val
 106  * @intpin_reg_wpermit_reg1:            INTPIN_REG_WPERMIT register 1 val
 107  * @intpin_reg_wpermit_reg2:            INTPIN_REG_WPERMIT register 2 val
 108  * @intpin_reg_wpermit_reg3:            INTPIN_REG_WPERMIT register 3 val
 109  * @int_reduce_control_reg:             INT_REDUCE_CONTROL registers val
 110  * @clkcfg_reg:                         CLK CFG register val
 111  * @funcsel_reg:                        Function select register value
 112  * @pch_phub_base_address:              Register base address
 113  * @pch_phub_extrom_base_address:       external rom base address
 114  * @pch_mac_start_address:              MAC address area start address
 115  * @pch_opt_rom_start_address:          Option ROM start address
 116  * @ioh_type:                           Save IOH type
 117  * @pdev:                               pointer to pci device struct
 118  */
 119 struct pch_phub_reg {
 120         u32 phub_id_reg;
 121         u32 q_pri_val_reg;
 122         u32 rc_q_maxsize_reg;
 123         u32 bri_q_maxsize_reg;
 124         u32 comp_resp_timeout_reg;
 125         u32 bus_slave_control_reg;
 126         u32 deadlock_avoid_type_reg;
 127         u32 intpin_reg_wpermit_reg0;
 128         u32 intpin_reg_wpermit_reg1;
 129         u32 intpin_reg_wpermit_reg2;
 130         u32 intpin_reg_wpermit_reg3;
 131         u32 int_reduce_control_reg[MAX_NUM_INT_REDUCE_CONTROL_REG];
 132         u32 clkcfg_reg;
 133         u32 funcsel_reg;
 134         void __iomem *pch_phub_base_address;
 135         void __iomem *pch_phub_extrom_base_address;
 136         u32 pch_mac_start_address;
 137         u32 pch_opt_rom_start_address;
 138         int ioh_type;
 139         struct pci_dev *pdev;
 140 };
 141
 142 /* SROM SPEC for MAC address assignment offset */
 143 static const int pch_phub_mac_offset[ETH_ALEN] = {0x3, 0x2, 0x1, 0x0, 0xb, 0xa};
 144
 145 static DEFINE_MUTEX(pch_phub_mutex);
 146
 147 /**
 148  * pch_phub_read_modify_write_reg() - Reading modifying and writing register
 149  * @reg_addr_offset:    Register offset address value.
 150  * @data:               Writing value.
 151  * @mask:               Mask value.
 152  */
 153 static void pch_phub_read_modify_write_reg(struct pch_phub_reg *chip,
 154                                            unsigned int reg_addr_offset,
 155                                            unsigned int data, unsigned int mask)
 156 {
 157         void __iomem *reg_addr = chip->pch_phub_base_address + reg_addr_offset;
 158         iowrite32(((ioread32(reg_addr) & ~mask)) | data, reg_addr);
 159 }
 160
 161 /* pch_phub_save_reg_conf - saves register configuration */
 162 static void pch_phub_save_reg_conf(struct pci_dev *pdev)
 163 {
 164         unsigned int i;
 165         struct pch_phub_reg *chip = pci_get_drvdata(pdev);
 166
 167         void __iomem *p = chip->pch_phub_base_address;
 168
 169         chip->phub_id_reg = ioread32(p + PCH_PHUB_ID_REG);
 170         chip->q_pri_val_reg = ioread32(p + PCH_PHUB_QUEUE_PRI_VAL_REG);
 171         chip->rc_q_maxsize_reg = ioread32(p + PCH_PHUB_RC_QUEUE_MAXSIZE_REG);
 172         chip->bri_q_maxsize_reg = ioread32(p + PCH_PHUB_BRI_QUEUE_MAXSIZE_REG);
 173         chip->comp_resp_timeout_reg =
 174                                 ioread32(p + PCH_PHUB_COMP_RESP_TIMEOUT_REG);
 175         chip->bus_slave_control_reg =
 176                                 ioread32(p + PCH_PHUB_BUS_SLAVE_CONTROL_REG);
 177         chip->deadlock_avoid_type_reg =
 178                                 ioread32(p + PCH_PHUB_DEADLOCK_AVOID_TYPE_REG);
 179         chip->intpin_reg_wpermit_reg0 =
 180                                 ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG0);
 181         chip->intpin_reg_wpermit_reg1 =
 182                                 ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG1);
 183         chip->intpin_reg_wpermit_reg2 =
 184                                 ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG2);
 185         chip->intpin_reg_wpermit_reg3 =
 186                                 ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG3);
 187         dev_dbg(&pdev->dev, "%s : "
 188                 "chip->phub_id_reg=%x, "
 189                 "chip->q_pri_val_reg=%x, "
 190                 "chip->rc_q_maxsize_reg=%x, "
 191                 "chip->bri_q_maxsize_reg=%x, "
 192                 "chip->comp_resp_timeout_reg=%x, "
 193                 "chip->bus_slave_control_reg=%x, "
 194                 "chip->deadlock_avoid_type_reg=%x, "
 195                 "chip->intpin_reg_wpermit_reg0=%x, "
 196                 "chip->intpin_reg_wpermit_reg1=%x, "
 197                 "chip->intpin_reg_wpermit_reg2=%x, "
 198                 "chip->intpin_reg_wpermit_reg3=%x\n", __func__,
 199                 chip->phub_id_reg,
 200                 chip->q_pri_val_reg,
 201                 chip->rc_q_maxsize_reg,
 202                 chip->bri_q_maxsize_reg,
 203                 chip->comp_resp_timeout_reg,
 204                 chip->bus_slave_control_reg,
 205                 chip->deadlock_avoid_type_reg,
 206                 chip->intpin_reg_wpermit_reg0,
 207                 chip->intpin_reg_wpermit_reg1,
 208                 chip->intpin_reg_wpermit_reg2,
 209                 chip->intpin_reg_wpermit_reg3);
 210         for (i = 0; i < MAX_NUM_INT_REDUCE_CONTROL_REG; i++) {
 211                 chip->int_reduce_control_reg[i] =
 212                     ioread32(p + PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE + 4 * i);
 213                 dev_dbg(&pdev->dev, "%s : "
 214                         "chip->int_reduce_control_reg[%d]=%x\n",
 215                         __func__, i, chip->int_reduce_control_reg[i]);
 216         }
 217         chip->clkcfg_reg = ioread32(p + CLKCFG_REG_OFFSET);
 218         if ((chip->ioh_type == 2) || (chip->ioh_type == 4))
 219                 chip->funcsel_reg = ioread32(p + FUNCSEL_REG_OFFSET);
 220 }
 221
 222 /* pch_phub_restore_reg_conf - restore register configuration */
 223 static void pch_phub_restore_reg_conf(struct pci_dev *pdev)
 224 {
 225         unsigned int i;
 226         struct pch_phub_reg *chip = pci_get_drvdata(pdev);
 227         void __iomem *p;
 228         p = chip->pch_phub_base_address;
 229
 230         iowrite32(chip->phub_id_reg, p + PCH_PHUB_ID_REG);
 231         iowrite32(chip->q_pri_val_reg, p + PCH_PHUB_QUEUE_PRI_VAL_REG);
 232         iowrite32(chip->rc_q_maxsize_reg, p + PCH_PHUB_RC_QUEUE_MAXSIZE_REG);
 233         iowrite32(chip->bri_q_maxsize_reg, p + PCH_PHUB_BRI_QUEUE_MAXSIZE_REG);
 234         iowrite32(chip->comp_resp_timeout_reg,
 235                                         p + PCH_PHUB_COMP_RESP_TIMEOUT_REG);
 236         iowrite32(chip->bus_slave_control_reg,
 237                                         p + PCH_PHUB_BUS_SLAVE_CONTROL_REG);
 238         iowrite32(chip->deadlock_avoid_type_reg,
 239                                         p + PCH_PHUB_DEADLOCK_AVOID_TYPE_REG);
 240         iowrite32(chip->intpin_reg_wpermit_reg0,
 241                                         p + PCH_PHUB_INTPIN_REG_WPERMIT_REG0);
 242         iowrite32(chip->intpin_reg_wpermit_reg1,
 243                                         p + PCH_PHUB_INTPIN_REG_WPERMIT_REG1);
 244         iowrite32(chip->intpin_reg_wpermit_reg2,
 245                                         p + PCH_PHUB_INTPIN_REG_WPERMIT_REG2);
 246         iowrite32(chip->intpin_reg_wpermit_reg3,
 247                                         p + PCH_PHUB_INTPIN_REG_WPERMIT_REG3);
 248         dev_dbg(&pdev->dev, "%s : "
 249                 "chip->phub_id_reg=%x, "
 250                 "chip->q_pri_val_reg=%x, "
 251                 "chip->rc_q_maxsize_reg=%x, "
 252                 "chip->bri_q_maxsize_reg=%x, "
 253                 "chip->comp_resp_timeout_reg=%x, "
 254                 "chip->bus_slave_control_reg=%x, "
 255                 "chip->deadlock_avoid_type_reg=%x, "
 256                 "chip->intpin_reg_wpermit_reg0=%x, "
 257                 "chip->intpin_reg_wpermit_reg1=%x, "
 258                 "chip->intpin_reg_wpermit_reg2=%x, "
 259                 "chip->intpin_reg_wpermit_reg3=%x\n", __func__,
 260                 chip->phub_id_reg,
 261                 chip->q_pri_val_reg,
 262                 chip->rc_q_maxsize_reg,
 263                 chip->bri_q_maxsize_reg,
 264                 chip->comp_resp_timeout_reg,
 265                 chip->bus_slave_control_reg,
 266                 chip->deadlock_avoid_type_reg,
 267                 chip->intpin_reg_wpermit_reg0,
 268                 chip->intpin_reg_wpermit_reg1,
 269                 chip->intpin_reg_wpermit_reg2,
 270                 chip->intpin_reg_wpermit_reg3);
 271         for (i = 0; i < MAX_NUM_INT_REDUCE_CONTROL_REG; i++) {
 272                 iowrite32(chip->int_reduce_control_reg[i],
 273                         p + PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE + 4 * i);
 274                 dev_dbg(&pdev->dev, "%s : "
 275                         "chip->int_reduce_control_reg[%d]=%x\n",
 276                         __func__, i, chip->int_reduce_control_reg[i]);
 277         }
 278
 279         iowrite32(chip->clkcfg_reg, p + CLKCFG_REG_OFFSET);
 280         if ((chip->ioh_type == 2) || (chip->ioh_type == 4))
 281                 iowrite32(chip->funcsel_reg, p + FUNCSEL_REG_OFFSET);
 282 }
 283
 284 /**
 285  * pch_phub_read_serial_rom() - Reading Serial ROM
 286  * @offset_address:     Serial ROM offset address to read.
 287  * @data:               Read buffer for specified Serial ROM value.
 288  */
 289 static void pch_phub_read_serial_rom(struct pch_phub_reg *chip,
 290                                      unsigned int offset_address, u8 *data)
 291 {
 292         void __iomem *mem_addr = chip->pch_phub_extrom_base_address +
 293                                                                 offset_address;
 294
 295         *data = ioread8(mem_addr);
 296 }
 297
 298 /**
 299  * pch_phub_write_serial_rom() - Writing Serial ROM
 300  * @offset_address:     Serial ROM offset address.
 301  * @data:               Serial ROM value to write.
 302  */
 303 static int pch_phub_write_serial_rom(struct pch_phub_reg *chip,
 304                                      unsigned int offset_address, u8 data)
 305 {
 306         void __iomem *mem_addr = chip->pch_phub_extrom_base_address +
 307                                         (offset_address & PCH_WORD_ADDR_MASK);
 308         int i;
 309         unsigned int word_data;
 310         unsigned int pos;
 311         unsigned int mask;
 312         pos = (offset_address % 4) * 8;
 313         mask = ~(0xFF << pos);
 314
 315         iowrite32(PCH_PHUB_ROM_WRITE_ENABLE,
 316                         chip->pch_phub_extrom_base_address + PHUB_CONTROL);
 317
 318         word_data = ioread32(mem_addr);
 319         iowrite32((word_data & mask) | (u32)data << pos, mem_addr);
 320
 321         i = 0;
 322         while (ioread8(chip->pch_phub_extrom_base_address +
 323                                                 PHUB_STATUS) != 0x00) {
 324                 msleep(1);
 325                 if (i == PHUB_TIMEOUT)
 326                         return -ETIMEDOUT;
 327                 i++;
 328         }
 329
 330         iowrite32(PCH_PHUB_ROM_WRITE_DISABLE,
 331                         chip->pch_phub_extrom_base_address + PHUB_CONTROL);
 332
 333         return 0;
 334 }
 335
 336 /**
 337  * pch_phub_read_serial_rom_val() - Read Serial ROM value
 338  * @offset_address:     Serial ROM address offset value.
 339  * @data:               Serial ROM value to read.
 340  */
 341 static void pch_phub_read_serial_rom_val(struct pch_phub_reg *chip,
 342                                          unsigned int offset_address, u8 *data)
 343 {
 344         unsigned int mem_addr;
 345
 346         mem_addr = chip->pch_mac_start_address +
 347                         pch_phub_mac_offset[offset_address];
 348
 349         pch_phub_read_serial_rom(chip, mem_addr, data);
 350 }
 351
 352 /**
 353  * pch_phub_write_serial_rom_val() - writing Serial ROM value
 354  * @offset_address:     Serial ROM address offset value.
 355  * @data:               Serial ROM value.
 356  */
 357 static int pch_phub_write_serial_rom_val(struct pch_phub_reg *chip,
 358                                          unsigned int offset_address, u8 data)
 359 {
 360         int retval;
 361         unsigned int mem_addr;
 362
 363         mem_addr = chip->pch_mac_start_address +
 364                         pch_phub_mac_offset[offset_address];
 365
 366         retval = pch_phub_write_serial_rom(chip, mem_addr, data);
 367
 368         return retval;
 369 }
 370
 371 /* pch_phub_gbe_serial_rom_conf - makes Serial ROM header format configuration
 372  * for Gigabit Ethernet MAC address
 373  */
 374 static int pch_phub_gbe_serial_rom_conf(struct pch_phub_reg *chip)
 375 {
 376         int retval;
 377
 378         retval = pch_phub_write_serial_rom(chip, 0x0b, 0xbc);
 379         retval |= pch_phub_write_serial_rom(chip, 0x0a, 0x10);
 380         retval |= pch_phub_write_serial_rom(chip, 0x09, 0x01);
 381         retval |= pch_phub_write_serial_rom(chip, 0x08, 0x02);
 382
 383         retval |= pch_phub_write_serial_rom(chip, 0x0f, 0x00);
 384         retval |= pch_phub_write_serial_rom(chip, 0x0e, 0x00);
 385         retval |= pch_phub_write_serial_rom(chip, 0x0d, 0x00);
 386         retval |= pch_phub_write_serial_rom(chip, 0x0c, 0x80);
 387
 388         retval |= pch_phub_write_serial_rom(chip, 0x13, 0xbc);
 389         retval |= pch_phub_write_serial_rom(chip, 0x12, 0x10);
 390         retval |= pch_phub_write_serial_rom(chip, 0x11, 0x01);
 391         retval |= pch_phub_write_serial_rom(chip, 0x10, 0x18);
 392
 393         retval |= pch_phub_write_serial_rom(chip, 0x1b, 0xbc);
 394         retval |= pch_phub_write_serial_rom(chip, 0x1a, 0x10);
 395         retval |= pch_phub_write_serial_rom(chip, 0x19, 0x01);
 396         retval |= pch_phub_write_serial_rom(chip, 0x18, 0x19);
 397
 398         retval |= pch_phub_write_serial_rom(chip, 0x23, 0xbc);
 399         retval |= pch_phub_write_serial_rom(chip, 0x22, 0x10);
 400         retval |= pch_phub_write_serial_rom(chip, 0x21, 0x01);
 401         retval |= pch_phub_write_serial_rom(chip, 0x20, 0x3a);
 402
 403         retval |= pch_phub_write_serial_rom(chip, 0x27, 0x01);
 404         retval |= pch_phub_write_serial_rom(chip, 0x26, 0x00);
 405         retval |= pch_phub_write_serial_rom(chip, 0x25, 0x00);
 406         retval |= pch_phub_write_serial_rom(chip, 0x24, 0x00);
 407
 408         return retval;
 409 }
 410
 411 /* pch_phub_gbe_serial_rom_conf_mp - makes SerialROM header format configuration
 412  * for Gigabit Ethernet MAC address
 413  */
 414 static int pch_phub_gbe_serial_rom_conf_mp(struct pch_phub_reg *chip)
 415 {
 416         int retval;
 417         u32 offset_addr;
 418
 419         offset_addr = 0x200;
 420         retval = pch_phub_write_serial_rom(chip, 0x03 + offset_addr, 0xbc);
 421         retval |= pch_phub_write_serial_rom(chip, 0x02 + offset_addr, 0x00);
 422         retval |= pch_phub_write_serial_rom(chip, 0x01 + offset_addr, 0x40);
 423         retval |= pch_phub_write_serial_rom(chip, 0x00 + offset_addr, 0x02);
 424
 425         retval |= pch_phub_write_serial_rom(chip, 0x07 + offset_addr, 0x00);
 426         retval |= pch_phub_write_serial_rom(chip, 0x06 + offset_addr, 0x00);
 427         retval |= pch_phub_write_serial_rom(chip, 0x05 + offset_addr, 0x00);
 428         retval |= pch_phub_write_serial_rom(chip, 0x04 + offset_addr, 0x80);
 429
 430         retval |= pch_phub_write_serial_rom(chip, 0x0b + offset_addr, 0xbc);
 431         retval |= pch_phub_write_serial_rom(chip, 0x0a + offset_addr, 0x00);
 432         retval |= pch_phub_write_serial_rom(chip, 0x09 + offset_addr, 0x40);
 433         retval |= pch_phub_write_serial_rom(chip, 0x08 + offset_addr, 0x18);
 434
 435         retval |= pch_phub_write_serial_rom(chip, 0x13 + offset_addr, 0xbc);
 436         retval |= pch_phub_write_serial_rom(chip, 0x12 + offset_addr, 0x00);
 437         retval |= pch_phub_write_serial_rom(chip, 0x11 + offset_addr, 0x40);
 438         retval |= pch_phub_write_serial_rom(chip, 0x10 + offset_addr, 0x19);
 439
 440         retval |= pch_phub_write_serial_rom(chip, 0x1b + offset_addr, 0xbc);
 441         retval |= pch_phub_write_serial_rom(chip, 0x1a + offset_addr, 0x00);
 442         retval |= pch_phub_write_serial_rom(chip, 0x19 + offset_addr, 0x40);
 443         retval |= pch_phub_write_serial_rom(chip, 0x18 + offset_addr, 0x3a);
 444
 445         retval |= pch_phub_write_serial_rom(chip, 0x1f + offset_addr, 0x01);
 446         retval |= pch_phub_write_serial_rom(chip, 0x1e + offset_addr, 0x00);
 447         retval |= pch_phub_write_serial_rom(chip, 0x1d + offset_addr, 0x00);
 448         retval |= pch_phub_write_serial_rom(chip, 0x1c + offset_addr, 0x00);
 449
 450         return retval;
 451 }
 452
 453 /**
 454  * pch_phub_read_gbe_mac_addr() - Read Gigabit Ethernet MAC address
 455  * @offset_address:     Gigabit Ethernet MAC address offset value.
 456  * @data:               Buffer of the Gigabit Ethernet MAC address value.
 457  */
 458 static void pch_phub_read_gbe_mac_addr(struct pch_phub_reg *chip, u8 *data)
 459 {
 460         int i;
 461         for (i = 0; i < ETH_ALEN; i++)
 462                 pch_phub_read_serial_rom_val(chip, i, &data[i]);
 463 }
 464
 465 /**
 466  * pch_phub_write_gbe_mac_addr() - Write MAC address
 467  * @offset_address:     Gigabit Ethernet MAC address offset value.
 468  * @data:               Gigabit Ethernet MAC address value.
 469  */
 470 static int pch_phub_write_gbe_mac_addr(struct pch_phub_reg *chip, u8 *data)
 471 {
 472         int retval;
 473         int i;
 474
 475         if ((chip->ioh_type == 1) || (chip->ioh_type == 5)) /* EG20T or ML7831*/
 476                 retval = pch_phub_gbe_serial_rom_conf(chip);
 477         else    /* ML7223 */
 478                 retval = pch_phub_gbe_serial_rom_conf_mp(chip);
 479         if (retval)
 480                 return retval;
 481
 482         for (i = 0; i < ETH_ALEN; i++) {
 483                 retval = pch_phub_write_serial_rom_val(chip, i, data[i]);
 484                 if (retval)
 485                         return retval;
 486         }
 487
 488         return retval;
 489 }
 490
 491 static ssize_t pch_phub_bin_read(struct file *filp, struct kobject *kobj,
 492                                  struct bin_attribute *attr, char *buf,
 493                                  loff_t off, size_t count)
 494 {
 495         unsigned int rom_signature;
 496         unsigned char rom_length;
 497         unsigned int tmp;
 498         unsigned int addr_offset;
 499         unsigned int orom_size;
 500         int ret;
 501         int err;
 502         ssize_t rom_size;
 503
 504         struct pch_phub_reg *chip =
 505                 dev_get_drvdata(container_of(kobj, struct device, kobj));
 506
 507         ret = mutex_lock_interruptible(&pch_phub_mutex);
 508         if (ret) {
 509                 err = -ERESTARTSYS;
 510                 goto return_err_nomutex;
 511         }
 512
 513         /* Get Rom signature */
 514         chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
 515         if (!chip->pch_phub_extrom_base_address)
 516                 goto exrom_map_err;
 517
 518         pch_phub_read_serial_rom(chip, chip->pch_opt_rom_start_address,
 519                                 (unsigned char *)&rom_signature);
 520         rom_signature &= 0xff;
 521         pch_phub_read_serial_rom(chip, chip->pch_opt_rom_start_address + 1,
 522                                 (unsigned char *)&tmp);
 523         rom_signature |= (tmp & 0xff) << 8;
 524         if (rom_signature == 0xAA55) {
 525                 pch_phub_read_serial_rom(chip,
 526                                          chip->pch_opt_rom_start_address + 2,
 527                                          &rom_length);
 528                 orom_size = rom_length * 512;
 529                 if (orom_size < off) {
 530                         addr_offset = 0;
 531                         goto return_ok;
 532                 }
 533                 if (orom_size < count) {
 534                         addr_offset = 0;
 535                         goto return_ok;
 536                 }
 537
 538                 for (addr_offset = 0; addr_offset < count; addr_offset++) {
 539                         pch_phub_read_serial_rom(chip,
 540                             chip->pch_opt_rom_start_address + addr_offset + off,
 541                             &buf[addr_offset]);
 542                 }
 543         } else {
 544                 err = -ENODATA;
 545                 goto return_err;
 546         }
 547 return_ok:
 548         pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
 549         mutex_unlock(&pch_phub_mutex);
 550         return addr_offset;
 551
 552 return_err:
 553         pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
 554 exrom_map_err:
 555         mutex_unlock(&pch_phub_mutex);
 556 return_err_nomutex:
 557         return err;
 558 }
 559
 560 static ssize_t pch_phub_bin_write(struct file *filp, struct kobject *kobj,
 561                                   struct bin_attribute *attr,
 562                                   char *buf, loff_t off, size_t count)
 563 {
 564         int err;
 565         unsigned int addr_offset;
 566         int ret;
 567         ssize_t rom_size;
 568         struct pch_phub_reg *chip =
 569                 dev_get_drvdata(container_of(kobj, struct device, kobj));
 570
 571         ret = mutex_lock_interruptible(&pch_phub_mutex);
 572         if (ret)
 573                 return -ERESTARTSYS;
 574
 575         if (off > PCH_PHUB_OROM_SIZE) {
 576                 addr_offset = 0;
 577                 goto return_ok;
 578         }
 579         if (count > PCH_PHUB_OROM_SIZE) {
 580                 addr_offset = 0;
 581                 goto return_ok;
 582         }
 583
 584         chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
 585         if (!chip->pch_phub_extrom_base_address) {
 586                 err = -ENOMEM;
 587                 goto exrom_map_err;
 588         }
 589
 590         for (addr_offset = 0; addr_offset < count; addr_offset++) {
 591                 if (PCH_PHUB_OROM_SIZE < off + addr_offset)
 592                         goto return_ok;
 593
 594                 ret = pch_phub_write_serial_rom(chip,
 595                             chip->pch_opt_rom_start_address + addr_offset + off,
 596                             buf[addr_offset]);
 597                 if (ret) {
 598                         err = ret;
 599                         goto return_err;
 600                 }
 601         }
 602
 603 return_ok:
 604         pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
 605         mutex_unlock(&pch_phub_mutex);
 606         return addr_offset;
 607
 608 return_err:
 609         pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
 610
 611 exrom_map_err:
 612         mutex_unlock(&pch_phub_mutex);
 613         return err;
 614 }
 615
 616 static ssize_t show_pch_mac(struct device *dev, struct device_attribute *attr,
 617                             char *buf)
 618 {
 619         u8 mac[8];
 620         struct pch_phub_reg *chip = dev_get_drvdata(dev);
 621         ssize_t rom_size;
 622
 623         chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
 624         if (!chip->pch_phub_extrom_base_address)
 625                 return -ENOMEM;
 626
 627         pch_phub_read_gbe_mac_addr(chip, mac);
 628         pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
 629
 630         return sprintf(buf, "%pM\n", mac);
 631 }
 632
 633 static ssize_t store_pch_mac(struct device *dev, struct device_attribute *attr,
 634                              const char *buf, size_t count)
 635 {
 636         u8 mac[6];
 637         ssize_t rom_size;
 638         struct pch_phub_reg *chip = dev_get_drvdata(dev);
 639
 640         if (count != 18)
 641                 return -EINVAL;
 642
 643         sscanf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
 644                 (u32 *)&mac[0], (u32 *)&mac[1], (u32 *)&mac[2], (u32 *)&mac[3],
 645                 (u32 *)&mac[4], (u32 *)&mac[5]);
 646
 647         chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
 648         if (!chip->pch_phub_extrom_base_address)
 649                 return -ENOMEM;
 650
 651         pch_phub_write_gbe_mac_addr(chip, mac);
 652         pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
 653
 654         return count;
 655 }
 656
 657 static DEVICE_ATTR(pch_mac, S_IRUGO | S_IWUSR, show_pch_mac, store_pch_mac);
 658
 659 static struct bin_attribute pch_bin_attr = {
 660         .attr = {
 661                 .name = "pch_firmware",
 662                 .mode = S_IRUGO | S_IWUSR,
 663         },
 664         .size = PCH_PHUB_OROM_SIZE + 1,
 665         .read = pch_phub_bin_read,
 666         .write = pch_phub_bin_write,
 667 };
 668
 669 static int pch_phub_probe(struct pci_dev *pdev,
 670                                     const struct pci_device_id *id)
 671 {
 672         int retval;
 673
 674         int ret;
 675         struct pch_phub_reg *chip;
 676
 677         chip = kzalloc(sizeof(struct pch_phub_reg), GFP_KERNEL);
 678         if (chip == NULL)
 679                 return -ENOMEM;
 680
 681         ret = pci_enable_device(pdev);
 682         if (ret) {
 683                 dev_err(&pdev->dev,
 684                 "%s : pci_enable_device FAILED(ret=%d)", __func__, ret);
 685                 goto err_pci_enable_dev;
 686         }
 687         dev_dbg(&pdev->dev, "%s : pci_enable_device returns %d\n", __func__,
 688                 ret);
 689
 690         ret = pci_request_regions(pdev, KBUILD_MODNAME);
 691         if (ret) {
 692                 dev_err(&pdev->dev,
 693                 "%s : pci_request_regions FAILED(ret=%d)", __func__, ret);
 694                 goto err_req_regions;
 695         }
 696         dev_dbg(&pdev->dev, "%s : "
 697                 "pci_request_regions returns %d\n", __func__, ret);
 698
 699         chip->pch_phub_base_address = pci_iomap(pdev, 1, 0);
 700
 701
 702         if (chip->pch_phub_base_address == NULL) {
 703                 dev_err(&pdev->dev, "%s : pci_iomap FAILED", __func__);
 704                 ret = -ENOMEM;
 705                 goto err_pci_iomap;
 706         }
 707         dev_dbg(&pdev->dev, "%s : pci_iomap SUCCESS and value "
 708                 "in pch_phub_base_address variable is %p\n", __func__,
 709                 chip->pch_phub_base_address);
 710
 711         chip->pdev = pdev; /* Save pci device struct */
 712
 713         if (id->driver_data == 1) { /* EG20T PCH */
 714                 const char *board_name;
 715
 716                 retval = sysfs_create_file(&pdev->dev.kobj,
 717                                            &dev_attr_pch_mac.attr);
 718                 if (retval)
 719                         goto err_sysfs_create;
 720
 721                 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
 722                 if (retval)
 723                         goto exit_bin_attr;
 724
 725                 pch_phub_read_modify_write_reg(chip,
 726                                                (unsigned int)CLKCFG_REG_OFFSET,
 727                                                CLKCFG_CAN_50MHZ,
 728                                                CLKCFG_CANCLK_MASK);
 729
 730                 /* quirk for CM-iTC board */
 731                 board_name = dmi_get_system_info(DMI_BOARD_NAME);
 732                 if (board_name && strstr(board_name, "CM-iTC"))
 733                         pch_phub_read_modify_write_reg(chip,
 734                                                 (unsigned int)CLKCFG_REG_OFFSET,
 735                                                 CLKCFG_UART_48MHZ | CLKCFG_BAUDDIV |
 736                                                 CLKCFG_PLL2VCO | CLKCFG_UARTCLKSEL,
 737                                                 CLKCFG_UART_MASK);
 738
 739                 /* set the prefech value */
 740                 iowrite32(0x000affaa, chip->pch_phub_base_address + 0x14);
 741                 /* set the interrupt delay value */
 742                 iowrite32(0x25, chip->pch_phub_base_address + 0x44);
 743                 chip->pch_opt_rom_start_address = PCH_PHUB_ROM_START_ADDR_EG20T;
 744                 chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_EG20T;
 745         } else if (id->driver_data == 2) { /* ML7213 IOH */
 746                 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
 747                 if (retval)
 748                         goto err_sysfs_create;
 749                 /* set the prefech value
 750                  * Device2(USB OHCI #1/ USB EHCI #1/ USB Device):a
 751                  * Device4(SDIO #0,1,2):f
 752                  * Device6(SATA 2):f
 753                  * Device8(USB OHCI #0/ USB EHCI #0):a
 754                  */
 755                 iowrite32(0x000affa0, chip->pch_phub_base_address + 0x14);
 756                 chip->pch_opt_rom_start_address =\
 757                                                  PCH_PHUB_ROM_START_ADDR_ML7213;
 758         } else if (id->driver_data == 3) { /* ML7223 IOH Bus-m*/
 759                 /* set the prefech value
 760                  * Device8(GbE)
 761                  */
 762                 iowrite32(0x000a0000, chip->pch_phub_base_address + 0x14);
 763                 /* set the interrupt delay value */
 764                 iowrite32(0x25, chip->pch_phub_base_address + 0x140);
 765                 chip->pch_opt_rom_start_address =\
 766                                                  PCH_PHUB_ROM_START_ADDR_ML7223;
 767                 chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_ML7223;
 768         } else if (id->driver_data == 4) { /* ML7223 IOH Bus-n*/
 769                 retval = sysfs_create_file(&pdev->dev.kobj,
 770                                            &dev_attr_pch_mac.attr);
 771                 if (retval)
 772                         goto err_sysfs_create;
 773                 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
 774                 if (retval)
 775                         goto exit_bin_attr;
 776                 /* set the prefech value
 777                  * Device2(USB OHCI #0,1,2,3/ USB EHCI #0):a
 778                  * Device4(SDIO #0,1):f
 779                  * Device6(SATA 2):f
 780                  */
 781                 iowrite32(0x0000ffa0, chip->pch_phub_base_address + 0x14);
 782                 chip->pch_opt_rom_start_address =\
 783                                                  PCH_PHUB_ROM_START_ADDR_ML7223;
 784                 chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_ML7223;
 785         } else if (id->driver_data == 5) { /* ML7831 */
 786                 retval = sysfs_create_file(&pdev->dev.kobj,
 787                                            &dev_attr_pch_mac.attr);
 788                 if (retval)
 789                         goto err_sysfs_create;
 790
 791                 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
 792                 if (retval)
 793                         goto exit_bin_attr;
 794
 795                 /* set the prefech value */
 796                 iowrite32(0x000affaa, chip->pch_phub_base_address + 0x14);
 797                 /* set the interrupt delay value */
 798                 iowrite32(0x25, chip->pch_phub_base_address + 0x44);
 799                 chip->pch_opt_rom_start_address = PCH_PHUB_ROM_START_ADDR_EG20T;
 800                 chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_EG20T;
 801         }
 802
 803         chip->ioh_type = id->driver_data;
 804         pci_set_drvdata(pdev, chip);
 805
 806         return 0;
 807 exit_bin_attr:
 808         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_pch_mac.attr);
 809
 810 err_sysfs_create:
 811         pci_iounmap(pdev, chip->pch_phub_base_address);
 812 err_pci_iomap:
 813         pci_release_regions(pdev);
 814 err_req_regions:
 815         pci_disable_device(pdev);
 816 err_pci_enable_dev:
 817         kfree(chip);
 818         dev_err(&pdev->dev, "%s returns %d\n", __func__, ret);
 819         return ret;
 820 }
 821
 822 static void pch_phub_remove(struct pci_dev *pdev)
 823 {
 824         struct pch_phub_reg *chip = pci_get_drvdata(pdev);
 825
 826         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_pch_mac.attr);
 827         sysfs_remove_bin_file(&pdev->dev.kobj, &pch_bin_attr);
 828         pci_iounmap(pdev, chip->pch_phub_base_address);
 829         pci_release_regions(pdev);
 830         pci_disable_device(pdev);
 831         kfree(chip);
 832 }
 833
 834 #ifdef CONFIG_PM
 835
 836 static int pch_phub_suspend(struct pci_dev *pdev, pm_message_t state)
 837 {
 838         int ret;
 839
 840         pch_phub_save_reg_conf(pdev);
 841         ret = pci_save_state(pdev);
 842         if (ret) {
 843                 dev_err(&pdev->dev,
 844                         " %s -pci_save_state returns %d\n", __func__, ret);
 845                 return ret;
 846         }
 847         pci_enable_wake(pdev, PCI_D3hot, 0);
 848         pci_disable_device(pdev);
 849         pci_set_power_state(pdev, pci_choose_state(pdev, state));
 850
 851         return 0;
 852 }
 853
 854 static int pch_phub_resume(struct pci_dev *pdev)
 855 {
 856         int ret;
 857
 858         pci_set_power_state(pdev, PCI_D0);
 859         pci_restore_state(pdev);
 860         ret = pci_enable_device(pdev);
 861         if (ret) {
 862                 dev_err(&pdev->dev,
 863                 "%s-pci_enable_device failed(ret=%d) ", __func__, ret);
 864                 return ret;
 865         }
 866
 867         pci_enable_wake(pdev, PCI_D3hot, 0);
 868         pch_phub_restore_reg_conf(pdev);
 869
 870         return 0;
 871 }
 872 #else
 873 #define pch_phub_suspend NULL
 874 #define pch_phub_resume NULL
 875 #endif /* CONFIG_PM */
 876
 877 static struct pci_device_id pch_phub_pcidev_id[] = {
 878         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PCH1_PHUB),       1,  },
 879         { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7213_PHUB), 2,  },
 880         { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7223_mPHUB), 3,  },
 881         { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7223_nPHUB), 4,  },
 882         { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7831_PHUB), 5,  },
 883         { }
 884 };
 885 MODULE_DEVICE_TABLE(pci, pch_phub_pcidev_id);
 886
 887 static struct pci_driver pch_phub_driver = {
 888         .name = "pch_phub",
 889         .id_table = pch_phub_pcidev_id,
 890         .probe = pch_phub_probe,
 891         .remove = pch_phub_remove,
 892         .suspend = pch_phub_suspend,
 893         .resume = pch_phub_resume
 894 };
 895
 896 module_pci_driver(pch_phub_driver);
 897
 898 MODULE_DESCRIPTION("Intel EG20T PCH/LAPIS Semiconductor IOH(ML7213/ML7223) PHUB");
 899 MODULE_LICENSE("GPL");