[PATCH 2/4] mfd: imanager2: Add Advantech EC APIs support for IT8516/18/28

Wei-Chun Pan
2014-07-14T12:55:17Z

drivers/mfd/imanager2_ec.c | 615 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 615 insertions(+)
create mode 100644 drivers/mfd/imanager2_ec.c

diff --git a/drivers/mfd/imanager2_ec.c b/drivers/mfd/imanager2_ec.c
new file mode 100644
index 0000000..f7a0003
--- /dev/null
+++ b/drivers/mfd/imanager2_ec.c
@@ -0,0 +1,615 @@
+/*
+ * imanager2_ec.c - MFD accessing driver of Advantech EC IT8516/18/28
+ * Copyright (C) 2014 Richard Vidal-Dorsch <richard.dorsch@advantech.com>
+ *
+ * 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, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/mfd/imanager2_ec.h>
+
+#define EC_UDELAY_TIME 50
+#define EC_MAX_TIMEOUT_COUNT 1000
+
+static int ec_wait_obf1(void)
+{
+ int i = EC_MAX_TIMEOUT_COUNT;
+ while (i--) {
+ if (inb(EC_IO_PORT_CMD) & IO_FLAG_OBF)
+ return 0;
+
+ udelay(EC_UDELAY_TIME);
+ };
+
+ return -EBUSY;
+}
+
+int ec_inb_after_obf1(u8 *data)
+{
+ int ret = ec_wait_obf1();
+ if (ret)
+ return ret;
+ *data = inb(EC_IO_PORT_DATA);
+ return 0;
+}
+EXPORT_SYMBOL(ec_inb_after_obf1);
+
+static int ec_wait_ibc0(void)
+{
+ int i = EC_MAX_TIMEOUT_COUNT;
+ while (i--) {
+ if (!(inb(EC_IO_PORT_CMD) & IO_FLAG_IBF))
+ return 0;
+
+ udelay(EC_UDELAY_TIME);
+ };
+
+ return -EBUSY;
+}
+
+int ec_outb_after_ibc0(u16 port, u8 data)
+{
+ int ret = ec_wait_ibc0();
+ if (ret)
+ return ret;
+ outb(data, port);
+ return 0;
+}
+EXPORT_SYMBOL(ec_outb_after_ibc0);
+
+static int imanager2_read_mailbox(u32 ecflag, u8 offset, u8 *data)
+{
+ if (ecflag & EC_FLAG_IO_MAILBOX) {
+ int ret = ec_wait_ibc0();
+ if (ret)
+ return ret;
+ inb(EC_IO_PORT_DATA);
+ outb(offset + EC_IO_CMD_READ_OFFSET, EC_IO_PORT_CMD);
+
+ return ec_inb_after_obf1(data);
+ } else {
+ outb(offset, EC_ITE_PORT_OFS);
+ *data = inb(EC_ITE_PORT_DATA);
+ }
+
+ return 0;
+}
+
+static int imanager2_write_mailbox(u32 ecflag, u8 offset, u8 data)
+{
+ if (ecflag & EC_FLAG_IO_MAILBOX) {
+ int ret = ec_outb_after_ibc0(EC_IO_PORT_CMD,
+ offset + EC_IO_CMD_WRITE_OFFSET);
+ if (ret)
+ return ret;
+
+ return ec_outb_after_ibc0(EC_IO_PORT_DATA, data);
+ } else {
+ outb(offset, EC_ITE_PORT_OFS);
+ outb(data, EC_ITE_PORT_DATA);
+ }
+
+ return 0;
+}
+
+static int imanager2_wait_mailbox_command0(u32 ecflag)
+{
+ u8 cmd;
+ int i, ret;
+
+ for (i = 0; i < EC_MAX_TIMEOUT_COUNT; i++) {
+ ret = imanager2_read_mailbox(ecflag, EC_MAILBOX_OFFSET_CMD,
+ &cmd);
+ if (ret)
+ return ret;
+ if (!cmd)
+ return 0;
+
+ udelay(EC_UDELAY_TIME);
+ }
+
+ return -EBUSY;
+}
+
+int imanager2_mbox_read_data(u32 ecflag, u8 cmd, u8 para, u8 *data, int len)
+{
+ int ret, i;
+ u8 status;
+
+ ret = imanager2_wait_mailbox_command0(ecflag);
+ if (ret)
+ return ret;
+
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_PARA, para);
+ if (ret)
+ return ret;
+
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_CMD, cmd);
+ if (ret)
+ return ret;
+
+ ret = imanager2_wait_mailbox_command0(ecflag);
+ if (ret)
+ return ret;
+
+ ret = imanager2_read_mailbox(ecflag, EC_MAILBOX_OFFSET_STATUS, &status);
+ if (ret)
+ return ret;
+ if (status != EC_MAILBOX_STATUS_SUCCESS)
+ return -ENXIO;
+
+ for (i = 0; i < len; i++) {
+ ret = imanager2_read_mailbox(ecflag, EC_MAILBOX_OFFSET_DAT(i),
+ &data[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(imanager2_mbox_read_data);
+
+int imanager2_mbox_write_data(u32 ecflag, u8 cmd, u8 para, u8 *data, int len)
+{
+ int ret, i;
+ u8 status;
+
+ ret = imanager2_wait_mailbox_command0(ecflag);
+ if (ret)
+ return ret;
+
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_PARA, para);
+ for (i = 0; i < len; i++) {
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_DAT(i),
+ data[i]);
+ if (ret)
+ return ret;
+ }
+
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_CMD, cmd);
+ if (ret)
+ return ret;
+
+ ret = imanager2_wait_mailbox_command0(ecflag);
+ if (ret)
+ return ret;
+
+ ret = imanager2_read_mailbox(ecflag, EC_MAILBOX_OFFSET_STATUS, &status);
+ if (ret)
+ return ret;
+ if (status != EC_MAILBOX_STATUS_SUCCESS)
+ return -ENXIO;
+
+ return 0;
+}
+EXPORT_SYMBOL(imanager2_mbox_write_data);
+
+int imanager2_mbox_read_ram(u32 ecflag, u8 bank, u8 offset, u8 *buf, u8 len)
+{
+ int i, ret;
+ u8 status;
+
+ if (len && !buf)
+ return -EINVAL;
+
+ if (len > 0x2B)
+ return -EINVAL; /* range: DATA01~DATA2B */
+
+ ret = imanager2_wait_mailbox_command0(ecflag);
+ if (ret)
+ return ret;
+
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_PARA, bank);
+ if (ret)
+ return ret;
+
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_DAT(0x00),
+ offset);
+ if (ret)
+ return ret;
+
+ if (len > 0x2B)
+ len = 0x2B; /* range: DATA01~DATA2B */
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_DAT(0x2C), len);
+ if (ret)
+ return ret;
+
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_CMD,
+ EC_CMD_MAILBOX_READ_EC_RAM);
+ if (ret)
+ return ret;
+
+ ret = imanager2_wait_mailbox_command0(ecflag);
+ if (ret)
+ return ret;
+
+ ret = imanager2_read_mailbox(ecflag, EC_MAILBOX_OFFSET_STATUS, &status);
+ if (ret)
+ return ret;
+ if (status != EC_MAILBOX_STATUS_SUCCESS)
+ return -ENXIO;
+
+ for (i = 0; i < len; i++) {
+ ret = imanager2_read_mailbox(ecflag,
+ EC_MAILBOX_OFFSET_DAT(1 + i),
+ &buf[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(imanager2_mbox_read_ram);
+
+int imanager2_mbox_write_ram(u32 ecflag, u8 bank, u8 offset, u8 *buf, u8 len)
+{
+ int i, ret;
+ u8 status;
+
+ if (len && !buf)
+ return -EINVAL;
+
+ if (len > 0x2B)
+ return -EINVAL; /* range: DATA01~DATA2B */
+
+ ret = imanager2_wait_mailbox_command0(ecflag);
+ if (ret)
+ return ret;
+
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_PARA, bank);
+ if (ret)
+ return ret;
+
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_DAT(0x00),
+ offset);
+ if (ret)
+ return ret;
+
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_DAT(0x2C), len);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < len; i++) {
+ ret = imanager2_write_mailbox(ecflag,
+ EC_MAILBOX_OFFSET_DAT(1 + i),
+ buf[i]);
+ if (ret)
+ return ret;
+ }
+
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_CMD,
+ EC_CMD_MAILBOX_WRITE_EC_RAM);
+ if (ret)
+ return ret;
+
+ ret = imanager2_wait_mailbox_command0(ecflag);
+ if (ret)
+ return ret;
+
+ ret = imanager2_read_mailbox(ecflag, EC_MAILBOX_OFFSET_STATUS, &status);
+ if (ret)
+ return ret;
+ if (status != EC_MAILBOX_STATUS_SUCCESS)
+ return -ENXIO;
+
+ return 0;
+}
+EXPORT_SYMBOL(imanager2_mbox_write_ram);
+
+int imanager2_mbox_get_dynamic_table(u32 ecflag, u8 type, u8 *table)
+{
+ int i, ret;
+ u8 status;
+
+ if (!table)
+ return -EINVAL;
+
+ ret = imanager2_wait_mailbox_command0(ecflag);
+ if (ret)
+ return ret;
+
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_PARA, type);
+ if (ret)
+ return ret;
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_CMD,
+ EC_CMD_MAILBOX_READ_DYNAMIC_TABLE);
+ if (ret)
+ return ret;
+
+ ret = imanager2_wait_mailbox_command0(ecflag);
+ if (ret)
+ return ret;
+
+ ret = imanager2_read_mailbox(ecflag, EC_MAILBOX_OFFSET_STATUS, &status);
+ if (ret)
+ return ret;
+ if (status != EC_MAILBOX_STATUS_SUCCESS)
+ return -ENXIO;
+
+ /* table size must be EC_MAX_ITEM_NUM (32 bytes) */
+ for (i = 0; i < EC_MAX_ITEM_NUM; i++) {
+ ret = imanager2_read_mailbox(ecflag, EC_MAILBOX_OFFSET_DAT(i),
+ &table[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(imanager2_mbox_get_dynamic_table);
+
+int imanager2_mbox_read_thermalzone(u32 ecflag, u8 zone, u8 *smbid, u8 *fanid,
+ u8 *buf, int *len)
+{
+ int ret, i;
+ u8 status, getlength;
+
+ if (!smbid && !fanid && !len)
+ return -EINVAL;
+
+ if (*len && !buf)
+ return -EINVAL;
+
+ ret = imanager2_wait_mailbox_command0(ecflag);
+ if (ret)
+ return ret;
+
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_PARA, zone);
+ if (ret)
+ return ret;
+ ret = imanager2_write_mailbox(ecflag, EC_MAILBOX_OFFSET_CMD,
+ EC_CMD_MAILBOX_READ_THERMAL_SOURCE);
+ if (ret)
+ return ret;
+
+ ret = imanager2_wait_mailbox_command0(ecflag);
+ if (ret)
+ return ret;
+
+ ret = imanager2_read_mailbox(ecflag, EC_MAILBOX_OFFSET_STATUS, &status);
+ if (ret)
+ return ret;
+ if (status != EC_MAILBOX_STATUS_SUCCESS)
+ return -ENXIO;
+
+ if (smbid) {
+ ret = imanager2_read_mailbox(ecflag,
+ EC_MAILBOX_OFFSET_DAT(0x00),
+ smbid);
+ if (ret)
+ return ret;
+ }
+
+ if (fanid) {
+ ret = imanager2_read_mailbox(ecflag,
+ EC_MAILBOX_OFFSET_DAT(0x01),
+ fanid);
+ if (ret)
+ return ret;
+ }
+
+ if (!len)
+ return 0;
+
+ ret = imanager2_read_mailbox(ecflag, EC_MAILBOX_OFFSET_DAT(0x2C),
+ &getlength);
+ if (ret)
+ return ret;
+
+ if (*len > getlength)
+ *len = getlength;
+
+ for (i = 0; i < *len; i++) {
+ ret = imanager2_read_mailbox(ecflag,
+ EC_MAILBOX_OFFSET_DAT(0x02 + i),
+ &buf[i]);
+ if (ret)
+ return ret;
+ }
+
+ if (*len < getlength) {
+ *len = getlength;
+ return -EINVAL;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(imanager2_mbox_read_thermalzone);
+
+int imanager2_mbox_get_project_information(u32 ecflag, u8 *prj_name,
+ u16 *kernel_ver, u16 *chip_code,
+ u16 *prj_id, u16 *prj_ver)
+{
+ int ret, i;
+
+ if (!prj_name && !kernel_ver && !chip_code && !prj_id && !prj_ver)
+ return -EINVAL;
+
+ ret = imanager2_wait_mailbox_command0(ecflag);
+ if (ret)
+ return ret;
+
+ ret = imanager2_write_mailbox(
+ ecflag, EC_MAILBOX_OFFSET_CMD,
+ EC_CMD_MAILBOX_GET_FIRMWARE_VERSION_AND_PROJECT_NAME);
+
+ ret = imanager2_wait_mailbox_command0(ecflag);
+ if (ret)
+ return ret;
+
+ if (prj_name) {
+ /* projection name length must be 9 bytes */
+ for (i = 0; i < EC_MAX_LEN_PROJECT_NAME; i++) {
+ ret = imanager2_read_mailbox(ecflag,
+ EC_MAILBOX_OFFSET_DAT(i),
+ &prj_name[i]);
+ if (ret)
+ return ret;
+ }
+ prj_name[EC_MAX_LEN_PROJECT_NAME] = '\0';
+ }
+
+ if (kernel_ver)
+ for (i = 0; i < sizeof(*kernel_ver); i++) {
+ ret = imanager2_read_mailbox(
+ ecflag, EC_MAILBOX_OFFSET_DAT(0x09 + i),
+ (u8 *)kernel_ver + i);
+ if (ret)
+ return ret;
+ }
+
+ if (chip_code)
+ for (i = 0; i < sizeof(*chip_code); i++) {
+ ret = imanager2_read_mailbox(
+ ecflag, EC_MAILBOX_OFFSET_DAT(0x0B + i),
+ (u8 *)chip_code + i);
+ if (ret)
+ return ret;
+ }
+
+ if (prj_id)
+ for (i = 0; i < sizeof(*prj_id); i++) {
+ ret = imanager2_read_mailbox(
+ ecflag, EC_MAILBOX_OFFSET_DAT(0x0D + i),
+ (u8 *)prj_id + i);
+ if (ret)
+ return ret;
+ }
+
+ if (prj_ver)
+ for (i = 0; i < sizeof(*prj_ver); i++) {
+ ret = imanager2_read_mailbox(
+ ecflag, EC_MAILBOX_OFFSET_DAT(0x0F + i),
+ (u8 *)prj_ver + i);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(imanager2_mbox_get_project_information);
+
+/* IO chennel access */
+int imanager2_mbox_io_read(u8 command, u8 offset, u8 *buf, u8 len)
+{
+ int ret, i;
+
+ if (!len)
+ return 0;
+
+ if (!buf)
+ return -EINVAL;
+
+ for (i = 0; i < len; i++) {
+ ret = ec_outb_after_ibc0(EC_IO_PORT_CMD, command);
+ if (ret)
+ return ret;
+
+ ret = ec_outb_after_ibc0(EC_IO_PORT_DATA, offset + i);
+ if (ret)
+ return ret;
+
+ ret = ec_inb_after_obf1(&buf[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(imanager2_mbox_io_read);
+
+int imanager2_mbox_io_write(u8 command, u8 offset, u8 *buf, u8 len)
+{
+ int ret, i;
+
+ if (!buf && len)
+ return -EINVAL;
+
+ for (i = 0; i < len; i++) {
+ ret = ec_outb_after_ibc0(EC_IO_PORT_CMD, command);
+ if (ret)
+ return ret;
+
+ ret = ec_outb_after_ibc0(EC_IO_PORT_DATA, offset + i);
+ if (ret)
+ return ret;
+
+ ret = ec_outb_after_ibc0(EC_IO_PORT_DATA, buf[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(imanager2_mbox_io_write);
+
+int imanager2_mbox_io_simple_read(u8 command, u8 *value)
+{
+ int ret;
+
+ if (!value)
+ return -EINVAL;
+
+ ret = ec_outb_after_ibc0(EC_IO_PORT_CMD, command);
+ if (ret)
+ return ret;
+
+ return ec_inb_after_obf1(value);
+}
+EXPORT_SYMBOL(imanager2_mbox_io_simple_read);
+
+/* ITE Mailbox & IO chennel access*/
+int imanager2_mbox_read_ram_support_io(u32 ecflag, u8 bank, u8 addr, u8 *buf,
+ u8 len)
+{
+ if (ecflag & EC_FLAG_MAILBOX) {
+ return imanager2_mbox_read_ram(ecflag, bank, addr, buf, len);
+ } else {
+ u8 iocmd;
+
+ if (bank == EC_RAM_BANK_ACPI)
+ iocmd = EC_CMD_ACPIRAM_READ;
+ else if (bank == EC_RAM_BANK_HW)
+ iocmd = EC_CMD_HWRAM_READ;
+ else if (bank == EC_RAM_BANK_EXT)
+ iocmd = EC_CMD_EXTRAM_READ;
+ else
+ return -EINVAL;
+
+ return imanager2_mbox_io_read(iocmd, addr, buf, len);
+ }
+}
+EXPORT_SYMBOL(imanager2_mbox_read_ram_support_io);
+
+int imanager2_mbox_write_ram_support_io(u32 ecflag, u8 bank, u8 addr, u8 *buf,
+ u8 len)
+{
+ u8 iocmd;
+
+ if (ecflag & EC_FLAG_MAILBOX)
+ return imanager2_mbox_write_ram(ecflag, bank, addr, buf, len);
+
+ if (bank == EC_RAM_BANK_ACPI)
+ iocmd = EC_CMD_ACPIRAM_WRITE;
+ else if (bank == EC_RAM_BANK_HW)
+ iocmd = EC_CMD_HWRAM_WRITE;
+ else if (bank == EC_RAM_BANK_EXT)
+ iocmd = EC_CMD_EXTRAM_WRITE;
+ else
+ return -EINVAL;
+
+ return imanager2_mbox_io_write(iocmd, addr, buf, len);
+}
+EXPORT_SYMBOL(imanager2_mbox_write_ram_support_io);
--
1.9.1