diff options
Diffstat (limited to 'drivers/misc/pch_phub.c')
| -rw-r--r-- | drivers/misc/pch_phub.c | 878 |
1 files changed, 878 insertions, 0 deletions
diff --git a/drivers/misc/pch_phub.c b/drivers/misc/pch_phub.c new file mode 100644 index 0000000000..8d2b713573 --- /dev/null +++ b/drivers/misc/pch_phub.c @@ -0,0 +1,878 @@ +// 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"); |