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linux/drivers/misc/pch_phub.c
Zubair Lutfullah Kakakhel bed3d7baba misc: pch_phub: Add UART_CLK quirk for Boston platform 
The EG20T has 4 UART blocks. The clock source for the UART block is
configured to receive a clock from an external pin by default.

An internal 25MHz clock in the EG20T can also be used as a clock source
for the clock.

The MIPS based Boston platform ties the external clock pin down and relies
on the internal clock source for the UART to function.

Boston is based on device tree.

Add a quirk to allow Boston to be detected via device tree and set the
correct clock source for UART.

Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-31 15:45:18 +02:00

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/*
* Copyright (C) 2011 LAPIS Semiconductor Co., Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
#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_VENDOR_ID_ROHM 0x10db
#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
* @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);
}
#ifdef CONFIG_PM
/* pch_phub_save_reg_conf - saves register configuration */
static void 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 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);
}
#endif
/**
* pch_phub_read_serial_rom() - Reading Serial ROM
* @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
* @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
* @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
* @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
* @offset_address: Gigabit Ethernet MAC address offset value.
* @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
* @offset_address: Gigabit Ethernet MAC address offset value.
* @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 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);
}
#ifdef CONFIG_PM
static int pch_phub_suspend(struct pci_dev *pdev, pm_message_t state)
{
int ret;
pch_phub_save_reg_conf(pdev);
ret = pci_save_state(pdev);
if (ret) {
dev_err(&pdev->dev,
" %s -pci_save_state returns %d\n", __func__, ret);
return ret;
}
pci_enable_wake(pdev, PCI_D3hot, 0);
pci_disable_device(pdev);
pci_set_power_state(pdev, pci_choose_state(pdev, state));
return 0;
}
static int pch_phub_resume(struct pci_dev *pdev)
{
int ret;
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
ret = pci_enable_device(pdev);
if (ret) {
dev_err(&pdev->dev,
"%s-pci_enable_device failed(ret=%d) ", __func__, ret);
return ret;
}
pci_enable_wake(pdev, PCI_D3hot, 0);
pch_phub_restore_reg_conf(pdev);
return 0;
}
#else
#define pch_phub_suspend NULL
#define pch_phub_resume NULL
#endif /* CONFIG_PM */
static 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 struct pci_driver pch_phub_driver = {
.name = "pch_phub",
.id_table = pch_phub_pcidev_id,
.probe = pch_phub_probe,
.remove = pch_phub_remove,
.suspend = pch_phub_suspend,
.resume = pch_phub_resume
};
module_pci_driver(pch_phub_driver);
MODULE_DESCRIPTION("Intel EG20T PCH/LAPIS Semiconductor IOH(ML7213/ML7223) PHUB");
MODULE_LICENSE("GPL");
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