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Input: elan_i2c - add support for different firmware page sizes
Prepare driver for devices that use different sizes of firmware pages. Signed-off-by: Jingle Wu <jingle.wu@emc.com.tw> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
parent
df10cc8db1
commit
059d6c2de6
4 changed files with 41 additions and 25 deletions
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@ -33,6 +33,8 @@
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#define ETP_FW_IAP_PAGE_ERR (1 << 5)
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#define ETP_FW_IAP_INTF_ERR (1 << 4)
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#define ETP_FW_PAGE_SIZE 64
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#define ETP_FW_PAGE_SIZE_128 128
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#define ETP_FW_PAGE_SIZE_512 512
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#define ETP_FW_SIGNATURE_SIZE 6
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struct i2c_client;
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@ -73,7 +75,7 @@ struct elan_transport_ops {
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int (*iap_reset)(struct i2c_client *client);
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int (*prepare_fw_update)(struct i2c_client *client);
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int (*write_fw_block)(struct i2c_client *client,
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int (*write_fw_block)(struct i2c_client *client, u16 fw_page_size,
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const u8 *page, u16 checksum, int idx);
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int (*finish_fw_update)(struct i2c_client *client,
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struct completion *reset_done);
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@ -89,7 +89,8 @@ struct elan_tp_data {
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u8 mode;
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u16 ic_type;
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u16 fw_validpage_count;
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u16 fw_signature_address;
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u16 fw_page_size;
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u32 fw_signature_address;
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bool irq_wake;
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@ -101,7 +102,7 @@ struct elan_tp_data {
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};
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static int elan_get_fwinfo(u16 ic_type, u16 *validpage_count,
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u16 *signature_address)
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u32 *signature_address, u16 *page_size)
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{
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switch (ic_type) {
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case 0x00:
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@ -130,12 +131,15 @@ static int elan_get_fwinfo(u16 ic_type, u16 *validpage_count,
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/* unknown ic type clear value */
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*validpage_count = 0;
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*signature_address = 0;
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*page_size = 0;
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return -ENXIO;
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}
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*signature_address =
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(*validpage_count * ETP_FW_PAGE_SIZE) - ETP_FW_SIGNATURE_SIZE;
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*page_size = ETP_FW_PAGE_SIZE;
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return 0;
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}
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@ -336,7 +340,8 @@ static int elan_query_device_info(struct elan_tp_data *data)
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return error;
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error = elan_get_fwinfo(data->ic_type, &data->fw_validpage_count,
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&data->fw_signature_address);
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&data->fw_signature_address,
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&data->fw_page_size);
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if (error)
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dev_warn(&data->client->dev,
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"unexpected iap version %#04x (ic type: %#04x), firmware update will not work\n",
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@ -424,14 +429,14 @@ static int elan_query_device_parameters(struct elan_tp_data *data)
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* IAP firmware updater related routines
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**********************************************************
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*/
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static int elan_write_fw_block(struct elan_tp_data *data,
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static int elan_write_fw_block(struct elan_tp_data *data, u16 page_size,
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const u8 *page, u16 checksum, int idx)
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{
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int retry = ETP_RETRY_COUNT;
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int error;
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do {
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error = data->ops->write_fw_block(data->client,
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error = data->ops->write_fw_block(data->client, page_size,
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page, checksum, idx);
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if (!error)
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return 0;
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@ -460,15 +465,16 @@ static int __elan_update_firmware(struct elan_tp_data *data,
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iap_start_addr = get_unaligned_le16(&fw->data[ETP_IAP_START_ADDR * 2]);
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boot_page_count = (iap_start_addr * 2) / ETP_FW_PAGE_SIZE;
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boot_page_count = (iap_start_addr * 2) / data->fw_page_size;
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for (i = boot_page_count; i < data->fw_validpage_count; i++) {
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u16 checksum = 0;
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const u8 *page = &fw->data[i * ETP_FW_PAGE_SIZE];
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const u8 *page = &fw->data[i * data->fw_page_size];
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for (j = 0; j < ETP_FW_PAGE_SIZE; j += 2)
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for (j = 0; j < data->fw_page_size; j += 2)
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checksum += ((page[j + 1] << 8) | page[j]);
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error = elan_write_fw_block(data, page, checksum, i);
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error = elan_write_fw_block(data, data->fw_page_size,
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page, checksum, i);
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if (error) {
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dev_err(dev, "write page %d fail: %d\n", i, error);
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return error;
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@ -19,6 +19,7 @@
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#include <linux/interrupt.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/sched.h>
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#include <asm/unaligned.h>
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@ -592,45 +593,52 @@ static int elan_i2c_prepare_fw_update(struct i2c_client *client)
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return 0;
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}
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static int elan_i2c_write_fw_block(struct i2c_client *client,
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static int elan_i2c_write_fw_block(struct i2c_client *client, u16 fw_page_size,
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const u8 *page, u16 checksum, int idx)
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{
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struct device *dev = &client->dev;
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u8 page_store[ETP_FW_PAGE_SIZE + 4];
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u8 *page_store;
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u8 val[3];
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u16 result;
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int ret, error;
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page_store = kmalloc(fw_page_size + 4, GFP_KERNEL);
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if (!page_store)
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return -ENOMEM;
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page_store[0] = ETP_I2C_IAP_REG_L;
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page_store[1] = ETP_I2C_IAP_REG_H;
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memcpy(&page_store[2], page, ETP_FW_PAGE_SIZE);
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memcpy(&page_store[2], page, fw_page_size);
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/* recode checksum at last two bytes */
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put_unaligned_le16(checksum, &page_store[ETP_FW_PAGE_SIZE + 2]);
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put_unaligned_le16(checksum, &page_store[fw_page_size + 2]);
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ret = i2c_master_send(client, page_store, sizeof(page_store));
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if (ret != sizeof(page_store)) {
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ret = i2c_master_send(client, page_store, fw_page_size + 4);
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if (ret != fw_page_size + 4) {
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error = ret < 0 ? ret : -EIO;
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dev_err(dev, "Failed to write page %d: %d\n", idx, error);
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return error;
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goto exit;
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}
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/* Wait for F/W to update one page ROM data. */
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msleep(35);
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msleep(fw_page_size == ETP_FW_PAGE_SIZE_512 ? 50 : 35);
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error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CTRL_CMD, val);
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if (error) {
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dev_err(dev, "Failed to read IAP write result: %d\n", error);
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return error;
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goto exit;
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}
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result = le16_to_cpup((__le16 *)val);
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if (result & (ETP_FW_IAP_PAGE_ERR | ETP_FW_IAP_INTF_ERR)) {
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dev_err(dev, "IAP reports failed write: %04hx\n",
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result);
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return -EIO;
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error = -EIO;
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goto exit;
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}
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return 0;
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exit:
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kfree(page_store);
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return error;
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}
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static int elan_i2c_finish_fw_update(struct i2c_client *client,
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@ -414,7 +414,7 @@ static int elan_smbus_prepare_fw_update(struct i2c_client *client)
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}
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static int elan_smbus_write_fw_block(struct i2c_client *client,
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static int elan_smbus_write_fw_block(struct i2c_client *client, u16 fw_page_size,
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const u8 *page, u16 checksum, int idx)
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{
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struct device *dev = &client->dev;
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@ -429,7 +429,7 @@ static int elan_smbus_write_fw_block(struct i2c_client *client,
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*/
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error = i2c_smbus_write_block_data(client,
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ETP_SMBUS_WRITE_FW_BLOCK,
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ETP_FW_PAGE_SIZE / 2,
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fw_page_size / 2,
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page);
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if (error) {
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dev_err(dev, "Failed to write page %d (part %d): %d\n",
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@ -439,8 +439,8 @@ static int elan_smbus_write_fw_block(struct i2c_client *client,
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error = i2c_smbus_write_block_data(client,
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ETP_SMBUS_WRITE_FW_BLOCK,
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ETP_FW_PAGE_SIZE / 2,
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page + ETP_FW_PAGE_SIZE / 2);
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fw_page_size / 2,
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page + fw_page_size / 2);
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if (error) {
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dev_err(dev, "Failed to write page %d (part %d): %d\n",
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idx, 2, error);
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