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linux-next/drivers/misc/pch_phub.c
Lee Jones 7b41187122 misc: pch_phub: Remove superfluous descriptions to non-existent args 'offset_address' 
Probably a copy 'n' paste error, 'offset_address' has never been
part of the pch_phub_{read,write}_gbe_mac_addr() functions.

Squashes the following W=1 warnings:

 drivers/misc/pch_phub.c:450: warning: Excess function parameter 'offset_address' description in 'pch_phub_read_gbe_mac_addr'
 drivers/misc/pch_phub.c:462: warning: Excess function parameter 'offset_address' description in 'pch_phub_write_gbe_mac_addr'

Cc: Masayuki Ohtak <masa-korg@dsn.okisemi.com>
Cc: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200701085853.164358-15-lee.jones@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-07-01 15:05:37 +02:00

879 lines
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2011 LAPIS Semiconductor Co., Ltd.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
#include <linux/string.h>
#include <linux/pci.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/if_ether.h>
#include <linux/ctype.h>
#include <linux/dmi.h>
#include <linux/of.h>
#define PHUB_STATUS 0x00 /* Status Register offset */
#define PHUB_CONTROL 0x04 /* Control Register offset */
#define PHUB_TIMEOUT 0x05 /* Time out value for Status Register */
#define PCH_PHUB_ROM_WRITE_ENABLE 0x01 /* Enabling for writing ROM */
#define PCH_PHUB_ROM_WRITE_DISABLE 0x00 /* Disabling for writing ROM */
#define PCH_PHUB_MAC_START_ADDR_EG20T 0x14 /* MAC data area start address
offset */
#define PCH_PHUB_MAC_START_ADDR_ML7223 0x20C /* MAC data area start address
offset */
#define PCH_PHUB_ROM_START_ADDR_EG20T 0x80 /* ROM data area start address offset
(Intel EG20T PCH)*/
#define PCH_PHUB_ROM_START_ADDR_ML7213 0x400 /* ROM data area start address
offset(LAPIS Semicon ML7213)
*/
#define PCH_PHUB_ROM_START_ADDR_ML7223 0x400 /* ROM data area start address
offset(LAPIS Semicon ML7223)
*/
/* MAX number of INT_REDUCE_CONTROL registers */
#define MAX_NUM_INT_REDUCE_CONTROL_REG 128
#define PCI_DEVICE_ID_PCH1_PHUB 0x8801
#define PCH_MINOR_NOS 1
#define CLKCFG_CAN_50MHZ 0x12000000
#define CLKCFG_CANCLK_MASK 0xFF000000
#define CLKCFG_UART_MASK 0xFFFFFF
/* CM-iTC */
#define CLKCFG_UART_48MHZ (1 << 16)
#define CLKCFG_UART_25MHZ (2 << 16)
#define CLKCFG_BAUDDIV (2 << 20)
#define CLKCFG_PLL2VCO (8 << 9)
#define CLKCFG_UARTCLKSEL (1 << 18)
/* Macros for ML7213 */
#define PCI_DEVICE_ID_ROHM_ML7213_PHUB 0x801A
/* Macros for ML7223 */
#define PCI_DEVICE_ID_ROHM_ML7223_mPHUB 0x8012 /* for Bus-m */
#define PCI_DEVICE_ID_ROHM_ML7223_nPHUB 0x8002 /* for Bus-n */
/* Macros for ML7831 */
#define PCI_DEVICE_ID_ROHM_ML7831_PHUB 0x8801
/* SROM ACCESS Macro */
#define PCH_WORD_ADDR_MASK (~((1 << 2) - 1))
/* Registers address offset */
#define PCH_PHUB_ID_REG 0x0000
#define PCH_PHUB_QUEUE_PRI_VAL_REG 0x0004
#define PCH_PHUB_RC_QUEUE_MAXSIZE_REG 0x0008
#define PCH_PHUB_BRI_QUEUE_MAXSIZE_REG 0x000C
#define PCH_PHUB_COMP_RESP_TIMEOUT_REG 0x0010
#define PCH_PHUB_BUS_SLAVE_CONTROL_REG 0x0014
#define PCH_PHUB_DEADLOCK_AVOID_TYPE_REG 0x0018
#define PCH_PHUB_INTPIN_REG_WPERMIT_REG0 0x0020
#define PCH_PHUB_INTPIN_REG_WPERMIT_REG1 0x0024
#define PCH_PHUB_INTPIN_REG_WPERMIT_REG2 0x0028
#define PCH_PHUB_INTPIN_REG_WPERMIT_REG3 0x002C
#define PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE 0x0040
#define CLKCFG_REG_OFFSET 0x500
#define FUNCSEL_REG_OFFSET 0x508
#define PCH_PHUB_OROM_SIZE 15360
/**
* struct pch_phub_reg - PHUB register structure
* @phub_id_reg: PHUB_ID register val
* @q_pri_val_reg: QUEUE_PRI_VAL register val
* @rc_q_maxsize_reg: RC_QUEUE_MAXSIZE register val
* @bri_q_maxsize_reg: BRI_QUEUE_MAXSIZE register val
* @comp_resp_timeout_reg: COMP_RESP_TIMEOUT register val
* @bus_slave_control_reg: BUS_SLAVE_CONTROL_REG register val
* @deadlock_avoid_type_reg: DEADLOCK_AVOID_TYPE register val
* @intpin_reg_wpermit_reg0: INTPIN_REG_WPERMIT register 0 val
* @intpin_reg_wpermit_reg1: INTPIN_REG_WPERMIT register 1 val
* @intpin_reg_wpermit_reg2: INTPIN_REG_WPERMIT register 2 val
* @intpin_reg_wpermit_reg3: INTPIN_REG_WPERMIT register 3 val
* @int_reduce_control_reg: INT_REDUCE_CONTROL registers val
* @clkcfg_reg: CLK CFG register val
* @funcsel_reg: Function select register value
* @pch_phub_base_address: Register base address
* @pch_phub_extrom_base_address: external rom base address
* @pch_mac_start_address: MAC address area start address
* @pch_opt_rom_start_address: Option ROM start address
* @ioh_type: Save IOH type
* @pdev: pointer to pci device struct
*/
struct pch_phub_reg {
u32 phub_id_reg;
u32 q_pri_val_reg;
u32 rc_q_maxsize_reg;
u32 bri_q_maxsize_reg;
u32 comp_resp_timeout_reg;
u32 bus_slave_control_reg;
u32 deadlock_avoid_type_reg;
u32 intpin_reg_wpermit_reg0;
u32 intpin_reg_wpermit_reg1;
u32 intpin_reg_wpermit_reg2;
u32 intpin_reg_wpermit_reg3;
u32 int_reduce_control_reg[MAX_NUM_INT_REDUCE_CONTROL_REG];
u32 clkcfg_reg;
u32 funcsel_reg;
void __iomem *pch_phub_base_address;
void __iomem *pch_phub_extrom_base_address;
u32 pch_mac_start_address;
u32 pch_opt_rom_start_address;
int ioh_type;
struct pci_dev *pdev;
};
/* SROM SPEC for MAC address assignment offset */
static const int pch_phub_mac_offset[ETH_ALEN] = {0x3, 0x2, 0x1, 0x0, 0xb, 0xa};
static DEFINE_MUTEX(pch_phub_mutex);
/**
* pch_phub_read_modify_write_reg() - Reading modifying and writing register
* @chip: Pointer to the PHUB register structure
* @reg_addr_offset: Register offset address value.
* @data: Writing value.
* @mask: Mask value.
*/
static void pch_phub_read_modify_write_reg(struct pch_phub_reg *chip,
unsigned int reg_addr_offset,
unsigned int data, unsigned int mask)
{
void __iomem *reg_addr = chip->pch_phub_base_address + reg_addr_offset;
iowrite32(((ioread32(reg_addr) & ~mask)) | data, reg_addr);
}
/* pch_phub_save_reg_conf - saves register configuration */
static void __maybe_unused pch_phub_save_reg_conf(struct pci_dev *pdev)
{
unsigned int i;
struct pch_phub_reg *chip = pci_get_drvdata(pdev);
void __iomem *p = chip->pch_phub_base_address;
chip->phub_id_reg = ioread32(p + PCH_PHUB_ID_REG);
chip->q_pri_val_reg = ioread32(p + PCH_PHUB_QUEUE_PRI_VAL_REG);
chip->rc_q_maxsize_reg = ioread32(p + PCH_PHUB_RC_QUEUE_MAXSIZE_REG);
chip->bri_q_maxsize_reg = ioread32(p + PCH_PHUB_BRI_QUEUE_MAXSIZE_REG);
chip->comp_resp_timeout_reg =
ioread32(p + PCH_PHUB_COMP_RESP_TIMEOUT_REG);
chip->bus_slave_control_reg =
ioread32(p + PCH_PHUB_BUS_SLAVE_CONTROL_REG);
chip->deadlock_avoid_type_reg =
ioread32(p + PCH_PHUB_DEADLOCK_AVOID_TYPE_REG);
chip->intpin_reg_wpermit_reg0 =
ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG0);
chip->intpin_reg_wpermit_reg1 =
ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG1);
chip->intpin_reg_wpermit_reg2 =
ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG2);
chip->intpin_reg_wpermit_reg3 =
ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG3);
dev_dbg(&pdev->dev, "%s : "
"chip->phub_id_reg=%x, "
"chip->q_pri_val_reg=%x, "
"chip->rc_q_maxsize_reg=%x, "
"chip->bri_q_maxsize_reg=%x, "
"chip->comp_resp_timeout_reg=%x, "
"chip->bus_slave_control_reg=%x, "
"chip->deadlock_avoid_type_reg=%x, "
"chip->intpin_reg_wpermit_reg0=%x, "
"chip->intpin_reg_wpermit_reg1=%x, "
"chip->intpin_reg_wpermit_reg2=%x, "
"chip->intpin_reg_wpermit_reg3=%x\n", __func__,
chip->phub_id_reg,
chip->q_pri_val_reg,
chip->rc_q_maxsize_reg,
chip->bri_q_maxsize_reg,
chip->comp_resp_timeout_reg,
chip->bus_slave_control_reg,
chip->deadlock_avoid_type_reg,
chip->intpin_reg_wpermit_reg0,
chip->intpin_reg_wpermit_reg1,
chip->intpin_reg_wpermit_reg2,
chip->intpin_reg_wpermit_reg3);
for (i = 0; i < MAX_NUM_INT_REDUCE_CONTROL_REG; i++) {
chip->int_reduce_control_reg[i] =
ioread32(p + PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE + 4 * i);
dev_dbg(&pdev->dev, "%s : "
"chip->int_reduce_control_reg[%d]=%x\n",
__func__, i, chip->int_reduce_control_reg[i]);
}
chip->clkcfg_reg = ioread32(p + CLKCFG_REG_OFFSET);
if ((chip->ioh_type == 2) || (chip->ioh_type == 4))
chip->funcsel_reg = ioread32(p + FUNCSEL_REG_OFFSET);
}
/* pch_phub_restore_reg_conf - restore register configuration */
static void __maybe_unused pch_phub_restore_reg_conf(struct pci_dev *pdev)
{
unsigned int i;
struct pch_phub_reg *chip = pci_get_drvdata(pdev);
void __iomem *p;
p = chip->pch_phub_base_address;
iowrite32(chip->phub_id_reg, p + PCH_PHUB_ID_REG);
iowrite32(chip->q_pri_val_reg, p + PCH_PHUB_QUEUE_PRI_VAL_REG);
iowrite32(chip->rc_q_maxsize_reg, p + PCH_PHUB_RC_QUEUE_MAXSIZE_REG);
iowrite32(chip->bri_q_maxsize_reg, p + PCH_PHUB_BRI_QUEUE_MAXSIZE_REG);
iowrite32(chip->comp_resp_timeout_reg,
p + PCH_PHUB_COMP_RESP_TIMEOUT_REG);
iowrite32(chip->bus_slave_control_reg,
p + PCH_PHUB_BUS_SLAVE_CONTROL_REG);
iowrite32(chip->deadlock_avoid_type_reg,
p + PCH_PHUB_DEADLOCK_AVOID_TYPE_REG);
iowrite32(chip->intpin_reg_wpermit_reg0,
p + PCH_PHUB_INTPIN_REG_WPERMIT_REG0);
iowrite32(chip->intpin_reg_wpermit_reg1,
p + PCH_PHUB_INTPIN_REG_WPERMIT_REG1);
iowrite32(chip->intpin_reg_wpermit_reg2,
p + PCH_PHUB_INTPIN_REG_WPERMIT_REG2);
iowrite32(chip->intpin_reg_wpermit_reg3,
p + PCH_PHUB_INTPIN_REG_WPERMIT_REG3);
dev_dbg(&pdev->dev, "%s : "
"chip->phub_id_reg=%x, "
"chip->q_pri_val_reg=%x, "
"chip->rc_q_maxsize_reg=%x, "
"chip->bri_q_maxsize_reg=%x, "
"chip->comp_resp_timeout_reg=%x, "
"chip->bus_slave_control_reg=%x, "
"chip->deadlock_avoid_type_reg=%x, "
"chip->intpin_reg_wpermit_reg0=%x, "
"chip->intpin_reg_wpermit_reg1=%x, "
"chip->intpin_reg_wpermit_reg2=%x, "
"chip->intpin_reg_wpermit_reg3=%x\n", __func__,
chip->phub_id_reg,
chip->q_pri_val_reg,
chip->rc_q_maxsize_reg,
chip->bri_q_maxsize_reg,
chip->comp_resp_timeout_reg,
chip->bus_slave_control_reg,
chip->deadlock_avoid_type_reg,
chip->intpin_reg_wpermit_reg0,
chip->intpin_reg_wpermit_reg1,
chip->intpin_reg_wpermit_reg2,
chip->intpin_reg_wpermit_reg3);
for (i = 0; i < MAX_NUM_INT_REDUCE_CONTROL_REG; i++) {
iowrite32(chip->int_reduce_control_reg[i],
p + PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE + 4 * i);
dev_dbg(&pdev->dev, "%s : "
"chip->int_reduce_control_reg[%d]=%x\n",
__func__, i, chip->int_reduce_control_reg[i]);
}
iowrite32(chip->clkcfg_reg, p + CLKCFG_REG_OFFSET);
if ((chip->ioh_type == 2) || (chip->ioh_type == 4))
iowrite32(chip->funcsel_reg, p + FUNCSEL_REG_OFFSET);
}
/**
* pch_phub_read_serial_rom() - Reading Serial ROM
* @chip: Pointer to the PHUB register structure
* @offset_address: Serial ROM offset address to read.
* @data: Read buffer for specified Serial ROM value.
*/
static void pch_phub_read_serial_rom(struct pch_phub_reg *chip,
unsigned int offset_address, u8 *data)
{
void __iomem *mem_addr = chip->pch_phub_extrom_base_address +
offset_address;
*data = ioread8(mem_addr);
}
/**
* pch_phub_write_serial_rom() - Writing Serial ROM
* @chip: Pointer to the PHUB register structure
* @offset_address: Serial ROM offset address.
* @data: Serial ROM value to write.
*/
static int pch_phub_write_serial_rom(struct pch_phub_reg *chip,
unsigned int offset_address, u8 data)
{
void __iomem *mem_addr = chip->pch_phub_extrom_base_address +
(offset_address & PCH_WORD_ADDR_MASK);
int i;
unsigned int word_data;
unsigned int pos;
unsigned int mask;
pos = (offset_address % 4) * 8;
mask = ~(0xFF << pos);
iowrite32(PCH_PHUB_ROM_WRITE_ENABLE,
chip->pch_phub_extrom_base_address + PHUB_CONTROL);
word_data = ioread32(mem_addr);
iowrite32((word_data & mask) | (u32)data << pos, mem_addr);
i = 0;
while (ioread8(chip->pch_phub_extrom_base_address +
PHUB_STATUS) != 0x00) {
msleep(1);
if (i == PHUB_TIMEOUT)
return -ETIMEDOUT;
i++;
}
iowrite32(PCH_PHUB_ROM_WRITE_DISABLE,
chip->pch_phub_extrom_base_address + PHUB_CONTROL);
return 0;
}
/**
* pch_phub_read_serial_rom_val() - Read Serial ROM value
* @chip: Pointer to the PHUB register structure
* @offset_address: Serial ROM address offset value.
* @data: Serial ROM value to read.
*/
static void pch_phub_read_serial_rom_val(struct pch_phub_reg *chip,
unsigned int offset_address, u8 *data)
{
unsigned int mem_addr;
mem_addr = chip->pch_mac_start_address +
pch_phub_mac_offset[offset_address];
pch_phub_read_serial_rom(chip, mem_addr, data);
}
/**
* pch_phub_write_serial_rom_val() - writing Serial ROM value
* @chip: Pointer to the PHUB register structure
* @offset_address: Serial ROM address offset value.
* @data: Serial ROM value.
*/
static int pch_phub_write_serial_rom_val(struct pch_phub_reg *chip,
unsigned int offset_address, u8 data)
{
int retval;
unsigned int mem_addr;
mem_addr = chip->pch_mac_start_address +
pch_phub_mac_offset[offset_address];
retval = pch_phub_write_serial_rom(chip, mem_addr, data);
return retval;
}
/* pch_phub_gbe_serial_rom_conf - makes Serial ROM header format configuration
* for Gigabit Ethernet MAC address
*/
static int pch_phub_gbe_serial_rom_conf(struct pch_phub_reg *chip)
{
int retval;
retval = pch_phub_write_serial_rom(chip, 0x0b, 0xbc);
retval |= pch_phub_write_serial_rom(chip, 0x0a, 0x10);
retval |= pch_phub_write_serial_rom(chip, 0x09, 0x01);
retval |= pch_phub_write_serial_rom(chip, 0x08, 0x02);
retval |= pch_phub_write_serial_rom(chip, 0x0f, 0x00);
retval |= pch_phub_write_serial_rom(chip, 0x0e, 0x00);
retval |= pch_phub_write_serial_rom(chip, 0x0d, 0x00);
retval |= pch_phub_write_serial_rom(chip, 0x0c, 0x80);
retval |= pch_phub_write_serial_rom(chip, 0x13, 0xbc);
retval |= pch_phub_write_serial_rom(chip, 0x12, 0x10);
retval |= pch_phub_write_serial_rom(chip, 0x11, 0x01);
retval |= pch_phub_write_serial_rom(chip, 0x10, 0x18);
retval |= pch_phub_write_serial_rom(chip, 0x1b, 0xbc);
retval |= pch_phub_write_serial_rom(chip, 0x1a, 0x10);
retval |= pch_phub_write_serial_rom(chip, 0x19, 0x01);
retval |= pch_phub_write_serial_rom(chip, 0x18, 0x19);
retval |= pch_phub_write_serial_rom(chip, 0x23, 0xbc);
retval |= pch_phub_write_serial_rom(chip, 0x22, 0x10);
retval |= pch_phub_write_serial_rom(chip, 0x21, 0x01);
retval |= pch_phub_write_serial_rom(chip, 0x20, 0x3a);
retval |= pch_phub_write_serial_rom(chip, 0x27, 0x01);
retval |= pch_phub_write_serial_rom(chip, 0x26, 0x00);
retval |= pch_phub_write_serial_rom(chip, 0x25, 0x00);
retval |= pch_phub_write_serial_rom(chip, 0x24, 0x00);
return retval;
}
/* pch_phub_gbe_serial_rom_conf_mp - makes SerialROM header format configuration
* for Gigabit Ethernet MAC address
*/
static int pch_phub_gbe_serial_rom_conf_mp(struct pch_phub_reg *chip)
{
int retval;
u32 offset_addr;
offset_addr = 0x200;
retval = pch_phub_write_serial_rom(chip, 0x03 + offset_addr, 0xbc);
retval |= pch_phub_write_serial_rom(chip, 0x02 + offset_addr, 0x00);
retval |= pch_phub_write_serial_rom(chip, 0x01 + offset_addr, 0x40);
retval |= pch_phub_write_serial_rom(chip, 0x00 + offset_addr, 0x02);
retval |= pch_phub_write_serial_rom(chip, 0x07 + offset_addr, 0x00);
retval |= pch_phub_write_serial_rom(chip, 0x06 + offset_addr, 0x00);
retval |= pch_phub_write_serial_rom(chip, 0x05 + offset_addr, 0x00);
retval |= pch_phub_write_serial_rom(chip, 0x04 + offset_addr, 0x80);
retval |= pch_phub_write_serial_rom(chip, 0x0b + offset_addr, 0xbc);
retval |= pch_phub_write_serial_rom(chip, 0x0a + offset_addr, 0x00);
retval |= pch_phub_write_serial_rom(chip, 0x09 + offset_addr, 0x40);
retval |= pch_phub_write_serial_rom(chip, 0x08 + offset_addr, 0x18);
retval |= pch_phub_write_serial_rom(chip, 0x13 + offset_addr, 0xbc);
retval |= pch_phub_write_serial_rom(chip, 0x12 + offset_addr, 0x00);
retval |= pch_phub_write_serial_rom(chip, 0x11 + offset_addr, 0x40);
retval |= pch_phub_write_serial_rom(chip, 0x10 + offset_addr, 0x19);
retval |= pch_phub_write_serial_rom(chip, 0x1b + offset_addr, 0xbc);
retval |= pch_phub_write_serial_rom(chip, 0x1a + offset_addr, 0x00);
retval |= pch_phub_write_serial_rom(chip, 0x19 + offset_addr, 0x40);
retval |= pch_phub_write_serial_rom(chip, 0x18 + offset_addr, 0x3a);
retval |= pch_phub_write_serial_rom(chip, 0x1f + offset_addr, 0x01);
retval |= pch_phub_write_serial_rom(chip, 0x1e + offset_addr, 0x00);
retval |= pch_phub_write_serial_rom(chip, 0x1d + offset_addr, 0x00);
retval |= pch_phub_write_serial_rom(chip, 0x1c + offset_addr, 0x00);
return retval;
}
/**
* pch_phub_read_gbe_mac_addr() - Read Gigabit Ethernet MAC address
* @chip: Pointer to the PHUB register structure
* @data: Buffer of the Gigabit Ethernet MAC address value.
*/
static void pch_phub_read_gbe_mac_addr(struct pch_phub_reg *chip, u8 *data)
{
int i;
for (i = 0; i < ETH_ALEN; i++)
pch_phub_read_serial_rom_val(chip, i, &data[i]);
}
/**
* pch_phub_write_gbe_mac_addr() - Write MAC address
* @chip: Pointer to the PHUB register structure
* @data: Gigabit Ethernet MAC address value.
*/
static int pch_phub_write_gbe_mac_addr(struct pch_phub_reg *chip, u8 *data)
{
int retval;
int i;
if ((chip->ioh_type == 1) || (chip->ioh_type == 5)) /* EG20T or ML7831*/
retval = pch_phub_gbe_serial_rom_conf(chip);
else /* ML7223 */
retval = pch_phub_gbe_serial_rom_conf_mp(chip);
if (retval)
return retval;
for (i = 0; i < ETH_ALEN; i++) {
retval = pch_phub_write_serial_rom_val(chip, i, data[i]);
if (retval)
return retval;
}
return retval;
}
static ssize_t pch_phub_bin_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t off, size_t count)
{
unsigned int rom_signature;
unsigned char rom_length;
unsigned int tmp;
unsigned int addr_offset;
unsigned int orom_size;
int ret;
int err;
ssize_t rom_size;
struct pch_phub_reg *chip = dev_get_drvdata(kobj_to_dev(kobj));
ret = mutex_lock_interruptible(&pch_phub_mutex);
if (ret) {
err = -ERESTARTSYS;
goto return_err_nomutex;
}
/* Get Rom signature */
chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
if (!chip->pch_phub_extrom_base_address) {
err = -ENODATA;
goto exrom_map_err;
}
pch_phub_read_serial_rom(chip, chip->pch_opt_rom_start_address,
(unsigned char *)&rom_signature);
rom_signature &= 0xff;
pch_phub_read_serial_rom(chip, chip->pch_opt_rom_start_address + 1,
(unsigned char *)&tmp);
rom_signature |= (tmp & 0xff) << 8;
if (rom_signature == 0xAA55) {
pch_phub_read_serial_rom(chip,
chip->pch_opt_rom_start_address + 2,
&rom_length);
orom_size = rom_length * 512;
if (orom_size < off) {
addr_offset = 0;
goto return_ok;
}
if (orom_size < count) {
addr_offset = 0;
goto return_ok;
}
for (addr_offset = 0; addr_offset < count; addr_offset++) {
pch_phub_read_serial_rom(chip,
chip->pch_opt_rom_start_address + addr_offset + off,
&buf[addr_offset]);
}
} else {
err = -ENODATA;
goto return_err;
}
return_ok:
pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
mutex_unlock(&pch_phub_mutex);
return addr_offset;
return_err:
pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
exrom_map_err:
mutex_unlock(&pch_phub_mutex);
return_err_nomutex:
return err;
}
static ssize_t pch_phub_bin_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
int err;
unsigned int addr_offset;
int ret;
ssize_t rom_size;
struct pch_phub_reg *chip = dev_get_drvdata(kobj_to_dev(kobj));
ret = mutex_lock_interruptible(&pch_phub_mutex);
if (ret)
return -ERESTARTSYS;
if (off > PCH_PHUB_OROM_SIZE) {
addr_offset = 0;
goto return_ok;
}
if (count > PCH_PHUB_OROM_SIZE) {
addr_offset = 0;
goto return_ok;
}
chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
if (!chip->pch_phub_extrom_base_address) {
err = -ENOMEM;
goto exrom_map_err;
}
for (addr_offset = 0; addr_offset < count; addr_offset++) {
if (PCH_PHUB_OROM_SIZE < off + addr_offset)
goto return_ok;
ret = pch_phub_write_serial_rom(chip,
chip->pch_opt_rom_start_address + addr_offset + off,
buf[addr_offset]);
if (ret) {
err = ret;
goto return_err;
}
}
return_ok:
pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
mutex_unlock(&pch_phub_mutex);
return addr_offset;
return_err:
pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
exrom_map_err:
mutex_unlock(&pch_phub_mutex);
return err;
}
static ssize_t show_pch_mac(struct device *dev, struct device_attribute *attr,
char *buf)
{
u8 mac[8];
struct pch_phub_reg *chip = dev_get_drvdata(dev);
ssize_t rom_size;
chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
if (!chip->pch_phub_extrom_base_address)
return -ENOMEM;
pch_phub_read_gbe_mac_addr(chip, mac);
pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
return sprintf(buf, "%pM\n", mac);
}
static ssize_t store_pch_mac(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
u8 mac[ETH_ALEN];
ssize_t rom_size;
struct pch_phub_reg *chip = dev_get_drvdata(dev);
int ret;
if (!mac_pton(buf, mac))
return -EINVAL;
chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
if (!chip->pch_phub_extrom_base_address)
return -ENOMEM;
ret = pch_phub_write_gbe_mac_addr(chip, mac);
pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
if (ret)
return ret;
return count;
}
static DEVICE_ATTR(pch_mac, S_IRUGO | S_IWUSR, show_pch_mac, store_pch_mac);
static const struct bin_attribute pch_bin_attr = {
.attr = {
.name = "pch_firmware",
.mode = S_IRUGO | S_IWUSR,
},
.size = PCH_PHUB_OROM_SIZE + 1,
.read = pch_phub_bin_read,
.write = pch_phub_bin_write,
};
static int pch_phub_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
int ret;
struct pch_phub_reg *chip;
chip = kzalloc(sizeof(struct pch_phub_reg), GFP_KERNEL);
if (chip == NULL)
return -ENOMEM;
ret = pci_enable_device(pdev);
if (ret) {
dev_err(&pdev->dev,
"%s : pci_enable_device FAILED(ret=%d)", __func__, ret);
goto err_pci_enable_dev;
}
dev_dbg(&pdev->dev, "%s : pci_enable_device returns %d\n", __func__,
ret);
ret = pci_request_regions(pdev, KBUILD_MODNAME);
if (ret) {
dev_err(&pdev->dev,
"%s : pci_request_regions FAILED(ret=%d)", __func__, ret);
goto err_req_regions;
}
dev_dbg(&pdev->dev, "%s : "
"pci_request_regions returns %d\n", __func__, ret);
chip->pch_phub_base_address = pci_iomap(pdev, 1, 0);
if (chip->pch_phub_base_address == NULL) {
dev_err(&pdev->dev, "%s : pci_iomap FAILED", __func__);
ret = -ENOMEM;
goto err_pci_iomap;
}
dev_dbg(&pdev->dev, "%s : pci_iomap SUCCESS and value "
"in pch_phub_base_address variable is %p\n", __func__,
chip->pch_phub_base_address);
chip->pdev = pdev; /* Save pci device struct */
if (id->driver_data == 1) { /* EG20T PCH */
const char *board_name;
unsigned int prefetch = 0x000affaa;
if (pdev->dev.of_node)
of_property_read_u32(pdev->dev.of_node,
"intel,eg20t-prefetch",
&prefetch);
ret = sysfs_create_file(&pdev->dev.kobj,
&dev_attr_pch_mac.attr);
if (ret)
goto err_sysfs_create;
ret = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
if (ret)
goto exit_bin_attr;
pch_phub_read_modify_write_reg(chip,
(unsigned int)CLKCFG_REG_OFFSET,
CLKCFG_CAN_50MHZ,
CLKCFG_CANCLK_MASK);
/* quirk for CM-iTC board */
board_name = dmi_get_system_info(DMI_BOARD_NAME);
if (board_name && strstr(board_name, "CM-iTC"))
pch_phub_read_modify_write_reg(chip,
(unsigned int)CLKCFG_REG_OFFSET,
CLKCFG_UART_48MHZ | CLKCFG_BAUDDIV |
CLKCFG_PLL2VCO | CLKCFG_UARTCLKSEL,
CLKCFG_UART_MASK);
/* set the prefech value */
iowrite32(prefetch, chip->pch_phub_base_address + 0x14);
/* set the interrupt delay value */
iowrite32(0x25, chip->pch_phub_base_address + 0x44);
chip->pch_opt_rom_start_address = PCH_PHUB_ROM_START_ADDR_EG20T;
chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_EG20T;
/* quirk for MIPS Boston platform */
if (pdev->dev.of_node) {
if (of_machine_is_compatible("img,boston")) {
pch_phub_read_modify_write_reg(chip,
(unsigned int)CLKCFG_REG_OFFSET,
CLKCFG_UART_25MHZ,
CLKCFG_UART_MASK);
}
}
} else if (id->driver_data == 2) { /* ML7213 IOH */
ret = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
if (ret)
goto err_sysfs_create;
/* set the prefech value
* Device2(USB OHCI #1/ USB EHCI #1/ USB Device):a
* Device4(SDIO #0,1,2):f
* Device6(SATA 2):f
* Device8(USB OHCI #0/ USB EHCI #0):a
*/
iowrite32(0x000affa0, chip->pch_phub_base_address + 0x14);
chip->pch_opt_rom_start_address =\
PCH_PHUB_ROM_START_ADDR_ML7213;
} else if (id->driver_data == 3) { /* ML7223 IOH Bus-m*/
/* set the prefech value
* Device8(GbE)
*/
iowrite32(0x000a0000, chip->pch_phub_base_address + 0x14);
/* set the interrupt delay value */
iowrite32(0x25, chip->pch_phub_base_address + 0x140);
chip->pch_opt_rom_start_address =\
PCH_PHUB_ROM_START_ADDR_ML7223;
chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_ML7223;
} else if (id->driver_data == 4) { /* ML7223 IOH Bus-n*/
ret = sysfs_create_file(&pdev->dev.kobj,
&dev_attr_pch_mac.attr);
if (ret)
goto err_sysfs_create;
ret = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
if (ret)
goto exit_bin_attr;
/* set the prefech value
* Device2(USB OHCI #0,1,2,3/ USB EHCI #0):a
* Device4(SDIO #0,1):f
* Device6(SATA 2):f
*/
iowrite32(0x0000ffa0, chip->pch_phub_base_address + 0x14);
chip->pch_opt_rom_start_address =\
PCH_PHUB_ROM_START_ADDR_ML7223;
chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_ML7223;
} else if (id->driver_data == 5) { /* ML7831 */
ret = sysfs_create_file(&pdev->dev.kobj,
&dev_attr_pch_mac.attr);
if (ret)
goto err_sysfs_create;
ret = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
if (ret)
goto exit_bin_attr;
/* set the prefech value */
iowrite32(0x000affaa, chip->pch_phub_base_address + 0x14);
/* set the interrupt delay value */
iowrite32(0x25, chip->pch_phub_base_address + 0x44);
chip->pch_opt_rom_start_address = PCH_PHUB_ROM_START_ADDR_EG20T;
chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_EG20T;
}
chip->ioh_type = id->driver_data;
pci_set_drvdata(pdev, chip);
return 0;
exit_bin_attr:
sysfs_remove_file(&pdev->dev.kobj, &dev_attr_pch_mac.attr);
err_sysfs_create:
pci_iounmap(pdev, chip->pch_phub_base_address);
err_pci_iomap:
pci_release_regions(pdev);
err_req_regions:
pci_disable_device(pdev);
err_pci_enable_dev:
kfree(chip);
dev_err(&pdev->dev, "%s returns %d\n", __func__, ret);
return ret;
}
static void pch_phub_remove(struct pci_dev *pdev)
{
struct pch_phub_reg *chip = pci_get_drvdata(pdev);
sysfs_remove_file(&pdev->dev.kobj, &dev_attr_pch_mac.attr);
sysfs_remove_bin_file(&pdev->dev.kobj, &pch_bin_attr);
pci_iounmap(pdev, chip->pch_phub_base_address);
pci_release_regions(pdev);
pci_disable_device(pdev);
kfree(chip);
}
static int __maybe_unused pch_phub_suspend(struct device *dev_d)
{
device_wakeup_disable(dev_d);
return 0;
}
static int __maybe_unused pch_phub_resume(struct device *dev_d)
{
device_wakeup_disable(dev_d);
return 0;
}
static const struct pci_device_id pch_phub_pcidev_id[] = {
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PCH1_PHUB), 1, },
{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7213_PHUB), 2, },
{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7223_mPHUB), 3, },
{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7223_nPHUB), 4, },
{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7831_PHUB), 5, },
{ }
};
MODULE_DEVICE_TABLE(pci, pch_phub_pcidev_id);
static SIMPLE_DEV_PM_OPS(pch_phub_pm_ops, pch_phub_suspend, pch_phub_resume);
static struct pci_driver pch_phub_driver = {
.name = "pch_phub",
.id_table = pch_phub_pcidev_id,
.probe = pch_phub_probe,
.remove = pch_phub_remove,
.driver.pm = &pch_phub_pm_ops,
};
module_pci_driver(pch_phub_driver);
MODULE_DESCRIPTION("Intel EG20T PCH/LAPIS Semiconductor IOH(ML7213/ML7223) PHUB");
MODULE_LICENSE("GPL");
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