Re: [PATCH] Topcliff PHUB: Generate PacketHub driver

Masayuki Ohtak
2010-06-22T10:33:58Z

Hi Arnd and Yong Y

We have updated phub patch about the following.
* Arnd's commnets
* Delete PCH_READ_REG/PCH_WRITE_REG
* Delete '_t' prefix
* Modify basic type
* Delete needless 'static' prefix
* Modify returned value
* Care returned value of get_user()
* Add .llseek line

* Yong Y's comments
* Applying to the latest checkpatch(2.6.35)
* Delete unused 'DEBUG' macro in Makefile
* Delete IEEE1588 lines
* Delete 'PCH_CAN_PCLK_50MHZ'

Thanks, Ohtake.

Kernel=2.6.33.1
Signed-off-by: Masayuki Ohtake <masa-korg@dsn.okisemi.com>
---
drivers/char/Kconfig | 12 +
drivers/char/Makefile | 2 +
drivers/char/pch_phub/Makefile | 3 +
drivers/char/pch_phub/pch_phub.c | 937 ++++++++++++++++++++++++++++++++++++++
drivers/char/pch_phub/pch_phub.h | 58 +++
5 files changed, 1012 insertions(+), 0 deletions(-)
create mode 100644 drivers/char/pch_phub/Makefile
create mode 100755 drivers/char/pch_phub/pch_phub.c
create mode 100755 drivers/char/pch_phub/pch_phub.h

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index e023682..7ff728a 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -4,6 +4,18 @@

menu "Character devices"

+config PCH_PHUB
+ tristate "PCH PHUB"
+ depends on PCI
+ help
+ If you say yes to this option, support will be included for the
+ PCH Packet Hub Host controller.
+ This driver is for PCH Packet hub driver for Topcliff.
+ This driver is integrated as built-in.
+ This driver can access GbE MAC address.
+ This driver can access HW register.
+ You can also be integrated as module.
+
config VT
bool "Virtual terminal" if EMBEDDED
depends on !S390
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index f957edf..1e3eb6c 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -111,6 +111,8 @@ obj-$(CONFIG_PS3_FLASH) += ps3flash.o
obj-$(CONFIG_JS_RTC) += js-rtc.o
js-rtc-y = rtc.o

+obj-$(CONFIG_PCH_PHUB) += pch_phub/
+
# Files generated that shall be removed upon make clean
clean-files := consolemap_deftbl.c defkeymap.c

diff --git a/drivers/char/pch_phub/Makefile b/drivers/char/pch_phub/Makefile
new file mode 100644
index 0000000..93aaffe
--- /dev/null
+++ b/drivers/char/pch_phub/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_PCH_PHUB) += pch_phub_drv.o
+
+pch_phub_drv-objs := pch_phub.o
diff --git a/drivers/char/pch_phub/pch_phub.c b/drivers/char/pch_phub/pch_phub.c
new file mode 100755
index 0000000..1590d6b
--- /dev/null
+++ b/drivers/char/pch_phub/pch_phub.c
@@ -0,0 +1,937 @@
+/*!
+ * @file pch_phub.c
+ * @brief Provides all the implementation of the interfaces pertaining to
+ * the Packet Hub module.
+ * @version 1.0.0.0
+ * @section
+ * 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.
+ */
+
+/*
+ * History:
+ * Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
+ *
+ * created:
+ * OKI SEMICONDUCTOR 04/14/2010
+ * modified:
+ *
+ */
+
+/* includes */
+
+#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/cdev.h>
+#include <linux/device.h>
+#include <linux/mutex.h>
+
+#include "pch_phub.h"
+
+/*--------------------------------------------
+ macros
+--------------------------------------------*/
+/* Status Register offset */
+#define PHUB_STATUS 0x00
+/* Control Register offset */
+#define PHUB_CONTROL 0x04
+/* Time out value for Status Register */
+#define PHUB_TIMEOUT 0x05
+/* Enabling for writing ROM */
+#define PCH_PHUB_ROM_WRITE_ENABLE 0x01
+/* Disabling for writing ROM */
+#define PCH_PHUB_ROM_WRITE_DISABLE 0x00
+/* ROM data area start address offset */
+#define PCH_PHUB_ROM_START_ADDR 0x14
+/* 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 MODULE_NAME "pch_phub"
+
+/*--------------------------------------------
+ global variables
+--------------------------------------------*/
+/**
+ * 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
+ * @pch_phub_base_address: register base address
+ * @pch_phub_extrom_base_address: external rom base address
+ * @pch_phub_suspended: PHUB status val
+ */
+struct pch_phub_reg {
+ unsigned int phub_id_reg;
+ unsigned int q_pri_val_reg;
+ unsigned int rc_q_maxsize_reg;
+ unsigned int bri_q_maxsize_reg;
+ unsigned int comp_resp_timeout_reg;
+ unsigned int bus_slave_control_reg;
+ unsigned int deadlock_avoid_type_reg;
+ unsigned int intpin_reg_wpermit_reg0;
+ unsigned int intpin_reg_wpermit_reg1;
+ unsigned int intpin_reg_wpermit_reg2;
+ unsigned int intpin_reg_wpermit_reg3;
+ unsigned int int_reduce_control_reg[MAX_NUM_INT_REDUCE_CONTROL_REG];
+ unsigned int clkcfg_reg;
+ void __iomem *pch_phub_base_address;
+ void __iomem *pch_phub_extrom_base_address;
+ int pch_phub_suspended;
+} pch_phub_reg;
+
+static DEFINE_MUTEX(pch_phub_ioctl_mutex);
+
+/* ToDo: major number allocation via module parameter */
+static dev_t pch_phub_dev_no;
+static int pch_phub_major_no;
+static struct cdev pch_phub_dev;
+
+/*--------------------------------------------
+ functions implementations
+--------------------------------------------*/
+/** pch_phub_read_modify_write_reg - Implements the functionality of reading,
+ * modifying and writing register.
+ * @reg_addr_offset: Contains the register offset address value
+ * @data: Contains the writing value
+ * @mask: Contains the mask value
+ */
+static void pch_phub_read_modify_write_reg(unsigned int reg_addr_offset,
+ unsigned int data, unsigned int mask)
+{
+ void __iomem *reg_addr = pch_phub_reg.pch_phub_base_address +\
+ reg_addr_offset;
+ iowrite32(((ioread32(reg_addr) & ~mask)) | data, reg_addr);
+ return;
+}
+
+
+/** pch_phub_save_reg_conf - saves register configuration
+ */
+static void pch_phub_save_reg_conf(struct pci_dev *pdev)
+{
+ unsigned int i = 0;
+ void __iomem *p = pch_phub_reg.pch_phub_base_address;
+
+ dev_dbg(&pdev->dev, "pch_phub_save_reg_conf ENTRY\n");
+ /* to store contents of PHUB_ID register */
+ pch_phub_reg.phub_id_reg = ioread32(p + PCH_PHUB_PHUB_ID_REG);
+ /* to store contents of QUEUE_PRI_VAL register */
+ pch_phub_reg.q_pri_val_reg = ioread32(p + PCH_PHUB_QUEUE_PRI_VAL_REG);
+ /* to store contents of RC_QUEUE_MAXSIZE register */
+ pch_phub_reg.rc_q_maxsize_reg =
+ ioread32(p + PCH_PHUB_RC_QUEUE_MAXSIZE_REG);
+ /* to store contents of BRI_QUEUE_MAXSIZE register */
+ pch_phub_reg.bri_q_maxsize_reg =
+ ioread32(p + PCH_PHUB_BRI_QUEUE_MAXSIZE_REG);
+ /* to store contents of COMP_RESP_TIMEOUT register */
+ pch_phub_reg.comp_resp_timeout_reg =
+ ioread32(p + PCH_PHUB_COMP_RESP_TIMEOUT_REG);
+ /* to store contents of BUS_SLAVE_CONTROL_REG register */
+ pch_phub_reg.bus_slave_control_reg =
+ ioread32(p + PCH_PHUB_BUS_SLAVE_CONTROL_REG);
+ /* to store contents of DEADLOCK_AVOID_TYPE register */
+ pch_phub_reg.deadlock_avoid_type_reg =
+ ioread32(p + PCH_PHUB_DEADLOCK_AVOID_TYPE_REG);
+ /* to store contents of INTPIN_REG_WPERMIT register 0 */
+ pch_phub_reg.intpin_reg_wpermit_reg0 =
+ ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG0);
+ /* to store contents of INTPIN_REG_WPERMIT register 1 */
+ pch_phub_reg.intpin_reg_wpermit_reg1 =
+ ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG1);
+ /* to store contents of INTPIN_REG_WPERMIT register 2 */
+ pch_phub_reg.intpin_reg_wpermit_reg2 =
+ ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG2);
+ /* to store contents of INTPIN_REG_WPERMIT register 3 */
+ pch_phub_reg.intpin_reg_wpermit_reg3 =
+ ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG3);
+ dev_dbg(&pdev->dev, "pch_phub_save_reg_conf : "
+ "pch_phub_reg.phub_id_reg=%x, "
+ "pch_phub_reg.q_pri_val_reg=%x, "
+ "pch_phub_reg.rc_q_maxsize_reg=%x, "
+ "pch_phub_reg.bri_q_maxsize_reg=%x, "
+ "pch_phub_reg.comp_resp_timeout_reg=%x, "
+ "pch_phub_reg.bus_slave_control_reg=%x, "
+ "pch_phub_reg.deadlock_avoid_type_reg=%x, "
+ "pch_phub_reg.intpin_reg_wpermit_reg0=%x, "
+ "pch_phub_reg.intpin_reg_wpermit_reg1=%x, "
+ "pch_phub_reg.intpin_reg_wpermit_reg2=%x, "
+ "pch_phub_reg.intpin_reg_wpermit_reg3=%x\n",
+ pch_phub_reg.phub_id_reg,
+ pch_phub_reg.q_pri_val_reg,
+ pch_phub_reg.rc_q_maxsize_reg,
+ pch_phub_reg.bri_q_maxsize_reg,
+ pch_phub_reg.comp_resp_timeout_reg,
+ pch_phub_reg.bus_slave_control_reg,
+ pch_phub_reg.deadlock_avoid_type_reg,
+ pch_phub_reg.intpin_reg_wpermit_reg0,
+ pch_phub_reg.intpin_reg_wpermit_reg1,
+ pch_phub_reg.intpin_reg_wpermit_reg2,
+ pch_phub_reg.intpin_reg_wpermit_reg3);
+ /* to store contents of INT_REDUCE_CONTROL registers */
+ for (i = 0; i < MAX_NUM_INT_REDUCE_CONTROL_REG; i++) {
+ pch_phub_reg.int_reduce_control_reg[i] =
+ ioread32(p +
+ PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE + 4 * i);
+ dev_dbg(&pdev->dev, "pch_phub_save_reg_conf : "
+ "pch_phub_reg.int_reduce_control_reg[%d]=%x\n",
+ i, pch_phub_reg.int_reduce_control_reg[i]);
+ }
+ /* save clk cfg register */
+ pch_phub_reg.clkcfg_reg = ioread32(p + CLKCFG_REG_OFFSET);
+
+ return;
+}
+
+/** pch_phub_restore_reg_conf - restore register configuration
+ */
+
+static void pch_phub_restore_reg_conf(struct pci_dev *pdev)
+{
+ unsigned int i;
+ void __iomem *p = pch_phub_reg.pch_phub_base_address;
+
+ dev_dbg(&pdev->dev, "pch_phub_restore_reg_conf ENTRY\n");
+ /* to store contents of PHUB_ID register */
+ iowrite32(pch_phub_reg.phub_id_reg, p + PCH_PHUB_PHUB_ID_REG);
+ /* to store contents of QUEUE_PRI_VAL register */
+ iowrite32(pch_phub_reg.q_pri_val_reg, p + PCH_PHUB_QUEUE_PRI_VAL_REG);
+ /* to store contents of RC_QUEUE_MAXSIZE register */
+ iowrite32(pch_phub_reg.rc_q_maxsize_reg,
+ p + PCH_PHUB_RC_QUEUE_MAXSIZE_REG);
+ /* to store contents of BRI_QUEUE_MAXSIZE register */
+ iowrite32(pch_phub_reg.bri_q_maxsize_reg,
+ p + PCH_PHUB_BRI_QUEUE_MAXSIZE_REG);
+ /* to store contents of COMP_RESP_TIMEOUT register */
+ iowrite32(pch_phub_reg.comp_resp_timeout_reg,
+ p + PCH_PHUB_COMP_RESP_TIMEOUT_REG);
+ /* to store contents of BUS_SLAVE_CONTROL_REG register */
+ iowrite32(pch_phub_reg.bus_slave_control_reg,
+ p + PCH_PHUB_BUS_SLAVE_CONTROL_REG);
+ /* to store contents of DEADLOCK_AVOID_TYPE register */
+ iowrite32(pch_phub_reg.deadlock_avoid_type_reg,
+ p + PCH_PHUB_DEADLOCK_AVOID_TYPE_REG);
+ /* to store contents of INTPIN_REG_WPERMIT register 0 */
+ iowrite32(pch_phub_reg.intpin_reg_wpermit_reg0,
+ p + PCH_PHUB_INTPIN_REG_WPERMIT_REG0);
+ /* to store contents of INTPIN_REG_WPERMIT register 1 */
+ iowrite32(pch_phub_reg.intpin_reg_wpermit_reg1,
+ p + PCH_PHUB_INTPIN_REG_WPERMIT_REG1);
+ /* to store contents of INTPIN_REG_WPERMIT register 2 */
+ iowrite32(pch_phub_reg.intpin_reg_wpermit_reg2,
+ p + PCH_PHUB_INTPIN_REG_WPERMIT_REG2);
+ /* to store contents of INTPIN_REG_WPERMIT register 3 */
+ iowrite32(pch_phub_reg.intpin_reg_wpermit_reg3,
+ p + PCH_PHUB_INTPIN_REG_WPERMIT_REG3);
+ dev_dbg(&pdev->dev, "pch_phub_save_reg_conf : "
+ "pch_phub_reg.phub_id_reg=%x, "
+ "pch_phub_reg.q_pri_val_reg=%x, "
+ "pch_phub_reg.rc_q_maxsize_reg=%x, "
+ "pch_phub_reg.bri_q_maxsize_reg=%x, "
+ "pch_phub_reg.comp_resp_timeout_reg=%x, "
+ "pch_phub_reg.bus_slave_control_reg=%x, "
+ "pch_phub_reg.deadlock_avoid_type_reg=%x, "
+ "pch_phub_reg.intpin_reg_wpermit_reg0=%x, "
+ "pch_phub_reg.intpin_reg_wpermit_reg1=%x, "
+ "pch_phub_reg.intpin_reg_wpermit_reg2=%x, "
+ "pch_phub_reg.intpin_reg_wpermit_reg3=%x\n",
+ pch_phub_reg.phub_id_reg,
+ pch_phub_reg.q_pri_val_reg,
+ pch_phub_reg.rc_q_maxsize_reg,
+ pch_phub_reg.bri_q_maxsize_reg,
+ pch_phub_reg.comp_resp_timeout_reg,
+ pch_phub_reg.bus_slave_control_reg,
+ pch_phub_reg.deadlock_avoid_type_reg,
+ pch_phub_reg.intpin_reg_wpermit_reg0,
+ pch_phub_reg.intpin_reg_wpermit_reg1,
+ pch_phub_reg.intpin_reg_wpermit_reg2,
+ pch_phub_reg.intpin_reg_wpermit_reg3);
+ /* to store contents of INT_REDUCE_CONTROL register */
+ for (i = 0; i < MAX_NUM_INT_REDUCE_CONTROL_REG; i++) {
+ iowrite32(pch_phub_reg.int_reduce_control_reg[i],
+ p + PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE + 4 * i);
+ dev_dbg(&pdev->dev, "pch_phub_save_reg_conf : "
+ "pch_phub_reg.int_reduce_control_reg[%d]=%x\n",
+ i, pch_phub_reg.int_reduce_control_reg[i]);
+ }
+
+ /*restore the clock config reg */
+ iowrite32(pch_phub_reg.clkcfg_reg, p + CLKCFG_REG_OFFSET);
+
+ return;
+}
+
+/** pch_phub_read_serial_rom - Implements the functionality of reading Serial
+ * ROM.
+ * @offset_address: Contains the Serial ROM address offset value
+ * @data: Contains the Serial ROM value
+ */
+static int pch_phub_read_serial_rom(unsigned int offset_address,
+ unsigned char *data)
+{
+ void __iomem *mem_addr = pch_phub_reg.pch_phub_extrom_base_address +\
+ offset_address;
+
+ *data = ioread8(mem_addr);
+
+ return 0;
+}
+
+/** pch_phub_write_serial_rom - Implements the functionality of writing Serial
+ * ROM.
+ * @offset_address: Contains the Serial ROM address offset value
+ * @data: Contains the Serial ROM value
+ */
+static int pch_phub_write_serial_rom(unsigned int offset_address,
+ unsigned char data)
+{
+ int retval = 0;
+ void __iomem *mem_addr = pch_phub_reg.pch_phub_extrom_base_address +\
+ (offset_address & 0xFFFFFFFC);
+ int i = 0;
+ unsigned int word_data = 0;
+
+ iowrite32(PCH_PHUB_ROM_WRITE_ENABLE,
+ pch_phub_reg.pch_phub_extrom_base_address +\
+ PHUB_CONTROL);
+
+ word_data = ioread32(mem_addr);
+
+ switch (offset_address % 4) {
+ case 0:
+ word_data &= 0xFFFFFF00;
+ iowrite32((word_data | (unsigned int)data),
+ mem_addr);
+ break;
+ case 1:
+ word_data &= 0xFFFF00FF;
+ iowrite32((word_data | ((unsigned int)data << 8)),
+ mem_addr);
+ break;
+ case 2:
+ word_data &= 0xFF00FFFF;
+ iowrite32((word_data | ((unsigned int)data << 16)),
+ mem_addr);
+ break;
+ case 3:
+ word_data &= 0x00FFFFFF;
+ iowrite32((word_data | ((unsigned int)data << 24)),
+ mem_addr);
+ break;
+ }
+ while (0x00 !=
+ ioread8(pch_phub_reg.pch_phub_extrom_base_address +\
+ PHUB_STATUS)) {
+ msleep(1);
+ if (PHUB_TIMEOUT == i) {
+ retval = -EPERM;
+ break;
+ }
+ i++;
+ }
+
+ iowrite32(PCH_PHUB_ROM_WRITE_DISABLE,
+ pch_phub_reg.pch_phub_extrom_base_address +\
+ PHUB_CONTROL);
+
+ return retval;
+}
+
+/** pch_phub_read_serial_rom_val - Implements the functionality of reading
+ * Serial ROM value.
+ * @offset_address: Contains the Serial ROM address offset value
+ * @data: Contains the Serial ROM value
+ */
+static int pch_phub_read_serial_rom_val(unsigned int offset_address,
+ unsigned char *data)
+{
+ int retval = 0;
+ unsigned int mem_addr;
+
+ mem_addr = (offset_address / 4 * 8) + 3 -
+ (offset_address % 4) + PCH_PHUB_ROM_START_ADDR;
+ retval = pch_phub_read_serial_rom(mem_addr, data);
+
+ return retval;
+}
+
+/** pch_phub_write_serial_rom_val - Implements the functionality of writing
+ * Serial ROM value.
+ * @offset_address: Contains the Serial ROM address offset value
+ * @data: Contains the Serial ROM value
+ */
+static int pch_phub_write_serial_rom_val(unsigned int offset_address,
+ unsigned char data)
+{
+ int retval = 0;
+ unsigned int mem_addr;
+
+ mem_addr =
+ (offset_address / 4 * 8) + 3 - (offset_address % 4) +
+ PCH_PHUB_ROM_START_ADDR;
+ retval = pch_phub_write_serial_rom(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(void)
+{
+ int retval = 0;
+
+ retval |= pch_phub_write_serial_rom(0x0b, 0xbc);
+ retval |= pch_phub_write_serial_rom(0x0a, 0x10);
+ retval |= pch_phub_write_serial_rom(0x09, 0x01);
+ retval |= pch_phub_write_serial_rom(0x08, 0x02);
+
+ retval |= pch_phub_write_serial_rom(0x0f, 0x00);
+ retval |= pch_phub_write_serial_rom(0x0e, 0x00);
+ retval |= pch_phub_write_serial_rom(0x0d, 0x00);
+ retval |= pch_phub_write_serial_rom(0x0c, 0x80);
+
+ retval |= pch_phub_write_serial_rom(0x13, 0xbc);
+ retval |= pch_phub_write_serial_rom(0x12, 0x10);
+ retval |= pch_phub_write_serial_rom(0x11, 0x01);
+ retval |= pch_phub_write_serial_rom(0x10, 0x18);
+
+ retval |= pch_phub_write_serial_rom(0x1b, 0xbc);
+ retval |= pch_phub_write_serial_rom(0x1a, 0x10);
+ retval |= pch_phub_write_serial_rom(0x19, 0x01);
+ retval |= pch_phub_write_serial_rom(0x18, 0x19);
+
+ retval |= pch_phub_write_serial_rom(0x23, 0xbc);
+ retval |= pch_phub_write_serial_rom(0x22, 0x10);
+ retval |= pch_phub_write_serial_rom(0x21, 0x01);
+ retval |= pch_phub_write_serial_rom(0x20, 0x3a);
+
+ retval |= pch_phub_write_serial_rom(0x27, 0x01);
+ retval |= pch_phub_write_serial_rom(0x26, 0x00);
+ retval |= pch_phub_write_serial_rom(0x25, 0x00);
+ retval |= pch_phub_write_serial_rom(0x24, 0x00);
+
+ return retval;
+}
+
+/** pch_phub_read_gbe_mac_addr - Contains the Gigabit Ethernet MAC address
+ * offset value
+ * @offset_address: Gigabit Ethernet MAC address offset value
+ * @data: Contains the Gigabit Ethernet MAC address value
+ */
+static int pch_phub_read_gbe_mac_addr(unsigned int offset_address,
+ unsigned char *data)
+{
+ int retval = 0;
+
+ retval = pch_phub_read_serial_rom_val(offset_address, data);
+
+ return retval;
+}
+
+/** pch_phub_write_gbe_mac_addr - Write MAC address
+ * @offset_address: Contains the Gigabit Ethernet MAC address offset value
+ * @data: Contains the Gigabit Ethernet MAC address value
+ */
+static int pch_phub_write_gbe_mac_addr(unsigned int offset_address,
+ unsigned char data)
+{
+ int retval = 0;
+
+ retval = pch_phub_gbe_serial_rom_conf();
+ retval |= pch_phub_write_serial_rom_val(offset_address, data);
+
+ return retval;
+}
+
+/** pch_phub_read - Implements the read functionality of the Packet Hub module.
+ * @file: Contains the reference of the file structure
+ * @buf: Usermode buffer pointer
+ * @size: Usermode buffer size
+ * @ppos: Contains the reference of the file structure
+ */
+
+static ssize_t pch_phub_read(struct file *file, char __user *buf, size_t size,
+ loff_t *ppos)
+{
+ unsigned int rom_signature = 0;
+ unsigned char rom_length;
+ int ret_value;
+ unsigned int tmp;
+ unsigned char data;
+ unsigned int addr_offset = 0;
+ unsigned int orom_size;
+ loff_t pos = *ppos;
+
+ if (pos < 0)
+ return -EINVAL;
+
+ /*Get Rom signature*/
+ pch_phub_read_serial_rom(0x80, (unsigned char *)&rom_signature);
+ pch_phub_read_serial_rom(0x81, (unsigned char *)&tmp);
+ rom_signature |= (tmp & 0xff) << 8;
+ if (rom_signature == 0xAA55) {
+ pch_phub_read_serial_rom(0x82, &rom_length);
+ orom_size = rom_length * 512;
+ if (orom_size < pos)
+ return 0;
+
+ for (addr_offset = 0; addr_offset < size; addr_offset++) {
+ pch_phub_read_serial_rom(0x80 + addr_offset + pos,
+ &data);
+ ret_value = copy_to_user(&buf[addr_offset], &data, 1);
+ if (ret_value)
+ return -EFAULT;
+
+ if (orom_size < pos + addr_offset) {
+ *ppos += addr_offset;
+ return addr_offset;
+ }
+
+ }
+ } else {
+ return -ENOEXEC;
+ }
+ *ppos += addr_offset;
+ return addr_offset;
+}
+
+/** pch_phub_write - Implements the write functionality of the Packet Hub
+ * module.
+ * @file: Contains the reference of the file structure
+ * @buf: Usermode buffer pointer
+ * @size: Usermode buffer size
+ * @ppos: Contains the reference of the file structure
+ */
+static ssize_t pch_phub_write(struct file *file, const char __user *buf,
+ size_t size, loff_t *ppos)
+{
+ unsigned int data;
+ int ret_value;
+ unsigned int addr_offset = 0;
+ loff_t pos = *ppos;
+
+ if (pos < 0)
+ return -EINVAL;
+
+ for (addr_offset = 0; addr_offset < size; addr_offset++) {
+ ret_value = get_user(data, &buf[addr_offset]);
+ if (ret_value)
+ return -EFAULT;
+
+ ret_value = pch_phub_write_serial_rom(0x80 + addr_offset + pos,
+ data);
+ if (ret_value)
+ return -EIO;
+
+ if (PCH_PHUB_OROM_SIZE < pos + addr_offset) {
+ *ppos += addr_offset;
+ return addr_offset;
+ }
+
+ }
+
+ *ppos += addr_offset;
+ return addr_offset;
+}
+
+
+/** pch_phub_ioctl - Implements the various ioctl functionalities of the Packet
+ * Hub module.
+ * @inode: Contains the reference of the inode structure
+ * @file: Contains the reference of the file structure
+ * @cmd: Contains the command value
+ * @arg: Contains the command argument value
+ */
+
+
+static long pch_phub_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ int ret_value = 0;
+ __u8 mac_addr[6];
+ int ret;
+ unsigned int i;
+ void __user *varg = (void __user *)arg;
+
+ ret = mutex_lock_interruptible(&pch_phub_ioctl_mutex);
+ if (ret) {
+ ret_value = -ERESTARTSYS;
+ goto return_nomutex;
+ }
+
+ if (pch_phub_reg.pch_phub_suspended == true) {
+ ret_value = -EPERM;
+ goto return_ioctrl;
+ }
+
+ switch (cmd) {
+ case IOCTL_PHUB_READ_MAC_ADDR:
+ for (i = 0; i < 6; i++)
+ pch_phub_read_gbe_mac_addr(i, &mac_addr[i]);
+
+ ret_value = copy_to_user(varg,
+ mac_addr, sizeof(mac_addr));
+ if (ret_value) {
+ ret_value = -EFAULT;
+ goto return_ioctrl;
+ }
+ break;
+
+ case IOCTL_PHUB_WRITE_MAC_ADDR:
+ ret_value = copy_from_user(mac_addr, varg, sizeof(mac_addr));
+
+ if (ret_value) {
+ ret_value = -EFAULT;
+ goto return_ioctrl;
+ }
+ for (i = 0; i < 6; i++)
+ pch_phub_write_gbe_mac_addr(i, mac_addr[i]);
+ break;
+
+ default:
+ ret_value = -EINVAL;
+ break;
+ }
+return_ioctrl:
+ mutex_unlock(&pch_phub_ioctl_mutex);
+return_nomutex:
+ return ret_value;
+}
+
+
+/**
+ * file_operations structure initialization
+ */
+static const struct file_operations pch_phub_fops = {
+ .owner = THIS_MODULE,
+ .read = pch_phub_read,
+ .write = pch_phub_write,
+ .unlocked_ioctl = pch_phub_ioctl,
+ .llseek = default_llseek
+};
+
+
+/** pch_phub_probe - Implements the probe functionality of the module.
+ * @pdev: Contains the reference of the pci_dev structure
+ * @id: Contains the reference of the pci_device_id structure
+ */
+static int __devinit pch_phub_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ char *DRIVER_NAME = "pch_phub";
+ int ret;
+ unsigned int rom_size;
+
+ pch_phub_major_no = (pch_phub_major_no < 0 || pch_phub_major_no > 254) ?
+ 0 : pch_phub_major_no;
+
+ ret = pci_enable_device(pdev);
+ if (ret) {
+ dev_dbg(&pdev->dev,
+ "\npch_phub_probe : pci_enable_device FAILED");
+ goto err_probe;
+ }
+ dev_dbg(&pdev->dev, "pch_phub_probe : "
+ "pci_enable_device returns %d\n", ret);
+
+ ret = pci_request_regions(pdev, DRIVER_NAME);
+ if (ret) {
+ dev_dbg(&pdev->dev,
+ "pch_phub_probe : pci_request_regions FAILED");
+ pci_disable_device(pdev);
+ goto err_probe;
+ }
+ dev_dbg(&pdev->dev, "pch_phub_probe : "
+ "pci_request_regions returns %d\n", ret);
+
+ pch_phub_reg.pch_phub_base_address = \
+ (void __iomem *)pci_iomap(pdev, 1, 0);
+
+ if (pch_phub_reg.pch_phub_base_address == 0) {
+ dev_dbg(&pdev->dev, "pch_phub_probe : pci_iomap FAILED");
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ ret = -ENOMEM;
+ goto err_probe;
+ }
+ dev_dbg(&pdev->dev, "pch_phub_probe : pci_iomap SUCCESS and value "
+ "in pch_phub_base_address variable is 0x%08x\n",
+ (unsigned int)pch_phub_reg.pch_phub_base_address);
+
+ pch_phub_reg.pch_phub_extrom_base_address =
+ (void __iomem *)pci_map_rom(pdev, &rom_size);
+ if (pch_phub_reg.pch_phub_extrom_base_address == 0) {
+ dev_dbg(&pdev->dev, "pch_phub_probe : pci_map_rom FAILED");
+ pci_iounmap(pdev, (void *)pch_phub_reg.pch_phub_base_address);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ ret = -ENOMEM;
+ goto err_probe;
+ }
+ dev_dbg(&pdev->dev, "pch_phub_probe : "
+ "pci_map_rom SUCCESS and value in "
+ "pch_phub_extrom_base_address variable is 0x%08x\n",
+ (unsigned int)pch_phub_reg.pch_phub_extrom_base_address);
+
+ if (pch_phub_major_no) {
+ pch_phub_dev_no = MKDEV(pch_phub_major_no, 0);
+ ret = register_chrdev_region(pch_phub_dev_no,
+ PCH_MINOR_NOS, DRIVER_NAME);
+ if (ret) {
+ dev_dbg(&pdev->dev, "pch_phub_probe : "
+ "register_chrdev_region FAILED");
+ pci_unmap_rom(pdev,
+ (void *)pch_phub_reg.pch_phub_extrom_base_address);
+ pci_iounmap(pdev,
+ (void *)pch_phub_reg.pch_phub_base_address);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ goto err_probe;
+ }
+ dev_dbg(&pdev->dev, "pch_phub_probe : "
+ "register_chrdev_region returns %d\n", ret);
+ } else {
+ ret = alloc_chrdev_region(&pch_phub_dev_no, 0,
+ PCH_MINOR_NOS, DRIVER_NAME);
+ if (ret) {
+ dev_dbg(&pdev->dev, "pch_phub_probe : "
+ "alloc_chrdev_region FAILED");
+ pci_unmap_rom(pdev,
+ (void *)pch_phub_reg.pch_phub_extrom_base_address);
+ pci_iounmap(pdev,
+ (void *)pch_phub_reg.pch_phub_base_address);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ goto err_probe;
+ }
+ dev_dbg(&pdev->dev, "pch_phub_probe : "
+ "alloc_chrdev_region returns %d\n", ret);
+ }
+
+ cdev_init(&pch_phub_dev, &pch_phub_fops);
+ dev_dbg(&pdev->dev,
+ "pch_phub_probe : cdev_init invoked successfully\n");
+
+ pch_phub_dev.owner = THIS_MODULE;
+ pch_phub_dev.ops = &pch_phub_fops;
+
+ ret = cdev_add(&pch_phub_dev, pch_phub_dev_no, PCH_MINOR_NOS);
+ if (ret) {
+ dev_dbg(&pdev->dev, "pch_phub_probe : cdev_add FAILED");
+ unregister_chrdev_region(pch_phub_dev_no, PCH_MINOR_NOS);
+ pci_unmap_rom(pdev,
+ (void *)pch_phub_reg.pch_phub_extrom_base_address);
+ pci_iounmap(pdev, (void *)pch_phub_reg.pch_phub_base_address);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ goto err_probe;
+ }
+ dev_dbg(&pdev->dev, "pch_phub_probe : cdev_add returns %d\n", ret);
+
+ /*set the clock config reg if CAN clock is 50Mhz */
+ dev_dbg(&pdev->dev, "pch_phub_probe : invoking "
+ "pch_phub_read_modify_write_reg "
+ "to set CLKCFG reg for CAN clk 50Mhz\n");
+ pch_phub_read_modify_write_reg((unsigned int)CLKCFG_REG_OFFSET,
+ CLKCFG_CAN_50MHZ, CLKCFG_CANCLK_MASK);
+
+ /* set the prefech value */
+ iowrite32(0x000ffffa, pch_phub_reg.pch_phub_base_address + 0x14);
+ /* set the interrupt delay value */
+ iowrite32(0x25, pch_phub_reg.pch_phub_base_address + 0x44);
+ return 0;
+
+err_probe:
+ dev_dbg(&pdev->dev, "pch_phub_probe returns %d\n", ret);
+ return ret;
+}
+
+/** pch_phub_remove - Implements the remove functionality of the module.
+ * @pdev: Contains the reference of the pci_dev structure
+ */
+static void __devexit pch_phub_remove(struct pci_dev *pdev)
+{
+
+ cdev_del(&pch_phub_dev);
+ dev_dbg(&pdev->dev,
+ "pch_phub_remove - cdev_del Invoked successfully\n");
+
+ unregister_chrdev_region(pch_phub_dev_no, PCH_MINOR_NOS);
+ dev_dbg(&pdev->dev, "pch_phub_remove - "
+ "unregister_chrdev_region Invoked successfully\n");
+
+ pci_unmap_rom(pdev, (void *)pch_phub_reg.pch_phub_extrom_base_address);
+
+ pci_iounmap(pdev, (void *)pch_phub_reg.pch_phub_base_address);
+
+ dev_dbg(&pdev->dev, "pch_phub_remove - "
+ "pci_iounmap Invoked successfully\n");
+
+ pci_release_regions(pdev);
+ dev_dbg(&pdev->dev, "pch_phub_remove - "
+ "pci_release_regions Invoked successfully\n");
+
+ pci_disable_device(pdev);
+ dev_dbg(&pdev->dev, "pch_phub_remove - "
+ "pci_disable_device Invoked successfully\n");
+
+}
+
+#ifdef CONFIG_PM
+
+/** pch_phub_suspend - Implements the suspend functionality of the module.
+ * @pdev: Contains the reference of the pci_dev structure
+ * @state: Contains the reference of the pm_message_t structure
+ */
+static int pch_phub_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ int ret;
+
+ pch_phub_reg.pch_phub_suspended = true;/* For blocking further IOCTLs */
+
+ pch_phub_save_reg_conf(pdev);
+ dev_dbg(&pdev->dev, "pch_phub_suspend - "
+ "pch_phub_save_reg_conf Invoked successfully\n");
+
+ ret = pci_save_state(pdev);
+ if (ret) {
+ dev_dbg(&pdev->dev,
+ " pch_phub_suspend -pci_save_state returns-%d\n", ret);
+ return ret;
+ }
+ dev_dbg(&pdev->dev,
+ "pch_phub_suspend - pci_save_state returns %d\n", ret);
+ pci_enable_wake(pdev, PCI_D3hot, 0);
+ dev_dbg(&pdev->dev, "pch_phub_suspend - "
+ "pci_enable_wake Invoked successfully\n");
+
+ pci_disable_device(pdev);
+ dev_dbg(&pdev->dev, "pch_phub_suspend - "
+ "pci_disable_device Invoked successfully\n");
+
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
+ dev_dbg(&pdev->dev, "pch_phub_suspend - "
+ "pci_set_power_state Invoked successfully "
+ "return = %d\n", 0);
+
+ return 0;
+}
+
+/** pch_phub_resume - Implements the resume functionality of the module.
+ * @pdev: Contains the reference of the pci_dev structure
+ */
+static int pch_phub_resume(struct pci_dev *pdev)
+{
+
+ int ret;
+
+ pci_set_power_state(pdev, PCI_D0);
+ dev_dbg(&pdev->dev, "pch_phub_resume - "
+ "pci_set_power_state Invoked successfully\n");
+
+ pci_restore_state(pdev);
+ dev_dbg(&pdev->dev, "pch_phub_resume - "
+ "pci_restore_state Invoked successfully\n");
+
+ ret = pci_enable_device(pdev);
+ if (ret) {
+ dev_dbg(&pdev->dev,
+ "pch_phub_resume-pci_enable_device failed ");
+ return ret;
+ }
+
+ dev_dbg(&pdev->dev, "pch_phub_resume - "
+ "pci_enable_device returns -%d\n", ret);
+
+ pci_enable_wake(pdev, PCI_D3hot, 0);
+ dev_dbg(&pdev->dev, "pch_phub_resume - "
+ "pci_enable_wake Invoked successfully\n");
+
+ pch_phub_restore_reg_conf(pdev);
+ dev_dbg(&pdev->dev, "pch_phub_resume - "
+ "pch_phub_restore_reg_conf Invoked successfully\n");
+
+ pch_phub_reg.pch_phub_suspended = false;
+
+ dev_dbg(&pdev->dev, "pch_phub_resume returns- %d\n", 0);
+ return 0;
+}
+#endif /* CONFIG_PM */
+
+static struct pci_device_id pch_phub_pcidev_id[] = {
+
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PCH1_PHUB)},
+ {0,}
+};
+
+
+static struct pci_driver pch_phub_driver = {
+ .name = "pch_phub",
+ .id_table = pch_phub_pcidev_id,
+ .probe = pch_phub_probe,
+ .remove = __devexit_p(pch_phub_remove),
+#ifdef CONFIG_PM
+ .suspend = pch_phub_suspend,
+ .resume = pch_phub_resume
+#endif
+};
+
+/** pch_phub_pci_init - Implements the initialization functionality of
+ * the module.
+ */
+static int __init pch_phub_pci_init(void)
+{
+ int ret;
+ ret = pci_register_driver(&pch_phub_driver);
+
+ return ret;
+}
+
+/** pch_phub_pci_exit - Implements the exit functionality of the module.
+ */
+static void __exit pch_phub_pci_exit(void)
+{
+ pci_unregister_driver(&pch_phub_driver);
+
+}
+
+module_init(pch_phub_pci_init);
+module_exit(pch_phub_pci_exit);
+module_param(pch_phub_major_no, int, S_IRUSR | S_IWUSR);
+
+MODULE_DESCRIPTION("PCH PACKET HUB PCI Driver");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/char/pch_phub/pch_phub.h b/drivers/char/pch_phub/pch_phub.h
new file mode 100755
index 0000000..83986d9
--- /dev/null
+++ b/drivers/char/pch_phub/pch_phub.h
@@ -0,0 +1,58 @@
+#ifndef __PCH_PHUB_H__
+#define __PCH_PHUB_H__
+/*!
+ * @file pch_phub.h
+ * @brief Provides all the interfaces pertaining to the Packet Hub module.
+ * @version 1.0.0.0
+ * @section
+ * 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.
+ */
+
+/*
+ * History:
+ * Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
+ *
+ * created:
+ * OKI SEMICONDUCTOR 04/14/2010
+ * modified:
+ *
+ */
+
+#define PHUB_IOCTL_MAGIC (0xf7)
+
+/*Outlines the read mac address function signature. */
+#define IOCTL_PHUB_READ_MAC_ADDR (_IOR(PHUB_IOCTL_MAGIC, 6, __u8[6]))
+
+/*brief Outlines the write mac address function signature. */
+#define IOCTL_PHUB_WRITE_MAC_ADDR (_IOW(PHUB_IOCTL_MAGIC, 7, __u8[6]))
+
+
+/* Registers address offset */
+#define PCH_PHUB_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 PCH_PHUB_OROM_SIZE 15360
+
+#endif
--
1.6.0.6