Hi Dmitry:
1. Could you please tell me what devices this patch was tested with? I want
to be sure we are not only adding support for newer devices, but also not
breaking existing ones.
--> The device which this patch was tested with was "coral".
--> Its corresponding ic_type was 0xD, 0xE, 0x10, 0x11, 0x13 0x14.
2. Also, could you please split this patch in 2: one adding variable length
firmware page size support, and another adding the new IC types.
--> As a result, Do I need to up-stream in total 3 patches?
3.
> + case 0x14:
> *validpage_count = 1024;
> break;
I would prefer if we listed 0x14 separately below.
--> OK
4. Do we really need to check ic_type here in addition to iap_version?
--> Yes, different ic_type might feat with different iap version
I.e. IC 0x11 - can it have IAP 2?
--> Yes
And will it be using 512 or 128 byte pages? In other words I am trying to
understand if we could determine page size solely by IAP version.
--> We need to have iap version and ic_type information to determine the
page size (512 or 128).
5. I think we have data->fw_page_size, we do not need to pass it separately
here.
--> OK
6.
> +
> + if ((val[0] == 0xFF) && (val[1] == 0xFF))
> + *pattern = 0;
> + else
> + *pattern = val[1];
This needs a comment explaining why we are doing it.
--> Some firmware of the IC_type did not create the pattern reading command,
they would get 0xFF 0xFF value if we trigger the pattern command.
As a result, we initial it as 0.
7. Haven't we queried IAP version already? Can we pass it in, along with
ic_type?
--> OK
8.
> + if ((ic_type >= 0x0D) && (iap_version >= 1)) {
No need for parenthesis around simple comparisons. Also, do we really need
to check both ic type and iap version?
--> Yes
Is there ICs less than 0x0d with newer IAP versions?
--> There have not been the ICs less than 0x0d with newer IAP versions so
far.
9.
> - u8 page_store[ETP_FW_PAGE_SIZE + 4];
> + u8 *page_store = kcalloc(1, fw_page_size + 4, GFP_KERNEL);
Why kcalloc()? kzalloc() if you want cleared memoryi, but I think kmalloc
would be fine.
--> Yes, we want to clear the memory.
THANKS
-----Original Message-----
From: Dmitry Torokhov [mailto:dmitry.torok...@gmail.com]
Sent: Sunday, July 12, 2020 2:09 PM
To: Jingle Wu
Cc: linux-kernel@vger.kernel.org; linux-in...@vger.kernel.org;
phoe...@emc.com.tw; josh.c...@emc.com.tw; dave.w...@emc.com.tw
Subject: Re: [PATCH 1/2] Input: elan_i2c - Add ic type 0x11 0x13 0x14.
Hi Jingle,
On Fri, Jul 10, 2020 at 01:40:47AM -0400, Jingle Wu wrote:
> Modify the iap method for all IC.
> Get the correct value of ic_type for old and new pattern of firmware.
Could you please tell me what devices this patch was tested with? I want to
be sure we are not only adding support for newer devices, but also not
breaking existing ones.
Also, could you please split this patch in 2: one adding variable length
firmware page size support, and another adding the new IC types.
>
> Signed-off-by: Jingle Wu <jingle...@emc.com.tw>
> ---
> drivers/input/mouse/elan_i2c.h | 6 +-
> drivers/input/mouse/elan_i2c_core.c | 52 ++++++++-----
> drivers/input/mouse/elan_i2c_i2c.c | 109 ++++++++++++++++++++++-----
> drivers/input/mouse/elan_i2c_smbus.c | 10 +--
> 4 files changed, 134 insertions(+), 43 deletions(-)
>
> diff --git a/drivers/input/mouse/elan_i2c.h
> b/drivers/input/mouse/elan_i2c.h index a9074ac9364f..f28b747978f5
> 100644
> --- a/drivers/input/mouse/elan_i2c.h
> +++ b/drivers/input/mouse/elan_i2c.h
> @@ -33,6 +33,8 @@
> #define ETP_FW_IAP_PAGE_ERR (1 << 5)
> #define ETP_FW_IAP_INTF_ERR (1 << 4)
> #define ETP_FW_PAGE_SIZE 64
> +#define ETP_FW_PAGE_SIZE_128 128
> +#define ETP_FW_PAGE_SIZE_512 512
> #define ETP_FW_SIGNATURE_SIZE 6
>
> struct i2c_client;
> @@ -72,8 +74,8 @@ struct elan_transport_ops {
> int (*iap_get_mode)(struct i2c_client *client, enum tp_mode *mode);
> int (*iap_reset)(struct i2c_client *client);
>
> - int (*prepare_fw_update)(struct i2c_client *client);
> - int (*write_fw_block)(struct i2c_client *client,
> + int (*prepare_fw_update)(struct i2c_client *client, u16 ic_type);
> + int (*write_fw_block)(struct i2c_client *client, u16 fw_page_size,
> const u8 *page, u16 checksum, int idx);
> int (*finish_fw_update)(struct i2c_client *client,
> struct completion *reset_done);
> diff --git a/drivers/input/mouse/elan_i2c_core.c
> b/drivers/input/mouse/elan_i2c_core.c
> index 3f9354baac4b..0703f7d0d02d 100644
> --- a/drivers/input/mouse/elan_i2c_core.c
> +++ b/drivers/input/mouse/elan_i2c_core.c
> @@ -89,7 +89,8 @@ struct elan_tp_data {
> u8 mode;
> u16 ic_type;
> u16 fw_validpage_count;
> - u16 fw_signature_address;
> + u16 fw_page_size;
> + u32 fw_signature_address;
>
> bool irq_wake;
>
> @@ -100,8 +101,10 @@ struct elan_tp_data {
> bool middle_button;
> };
>
> -static int elan_get_fwinfo(u16 ic_type, u16 *validpage_count,
> - u16 *signature_address)
> +static int elan_get_fwinfo(u16 ic_type, u8 iap_version,
> + u16 *validpage_count,
> + u32 *signature_address,
> + u16 *page_size)
> {
> switch (ic_type) {
> case 0x00:
> @@ -124,18 +127,34 @@ static int elan_get_fwinfo(u16 ic_type, u16
*validpage_count,
> *validpage_count = 640;
> break;
> case 0x10:
> + case 0x14:
> *validpage_count = 1024;
> break;
I would prefer if we listed 0x14 separately below.
> + case 0x11:
> + *validpage_count = 1280;
> + break;
> + case 0x13:
> + *validpage_count = 2048;
> + break;
> default:
> /* unknown ic type clear value */
> *validpage_count = 0;
> *signature_address = 0;
> + *page_size = 0;
> return -ENXIO;
> }
>
> *signature_address =
> (*validpage_count * ETP_FW_PAGE_SIZE) -
ETP_FW_SIGNATURE_SIZE;
>
> + if ((ic_type == 0x14) && (iap_version >= 2)) {
> + *validpage_count /= 8;
> + *page_size = ETP_FW_PAGE_SIZE_512;
Do we really need to check ic_type here in addition to iap_version?
I.e. IC 0x11 - can it have IAP 2? And will it be using 512 or 128 byte
pages? In other words I am trying to understand if we could determine page
size solely by IAP version.
> + } else if ((ic_type >= 0x0D) && (iap_version >= 1)) {
> + *validpage_count /= 2;
> + *page_size = ETP_FW_PAGE_SIZE_128;
> + } else
> + *page_size = ETP_FW_PAGE_SIZE;
> return 0;
> }
>
> @@ -312,7 +331,6 @@ static int elan_initialize(struct elan_tp_data
> *data) static int elan_query_device_info(struct elan_tp_data *data)
> {
> int error;
> - u16 ic_type;
>
> error = data->ops->get_version(data->client, false,
&data->fw_version);
> if (error)
> @@ -336,13 +354,10 @@ static int elan_query_device_info(struct
elan_tp_data *data)
> if (error)
> return error;
>
> - if (data->pattern == 0x01)
> - ic_type = data->ic_type;
> - else
> - ic_type = data->iap_version;
> -
> - error = elan_get_fwinfo(ic_type, &data->fw_validpage_count,
> - &data->fw_signature_address);
> + error = elan_get_fwinfo(data->ic_type, data->iap_version,
> + &data->fw_validpage_count,
> + &data->fw_signature_address,
> + &data->fw_page_size);
> if (error)
> dev_warn(&data->client->dev,
> "unexpected iap version %#04x (ic type: %#04x),
firmware update
> will not work\n", @@ -430,14 +445,14 @@ static int
elan_query_device_parameters(struct elan_tp_data *data)
> * IAP firmware updater related routines
> **********************************************************
> */
> -static int elan_write_fw_block(struct elan_tp_data *data,
> +static int elan_write_fw_block(struct elan_tp_data *data, u16
> +page_size,
I think we have data->fw_page_size, we do not need to pass it separately
here.
> const u8 *page, u16 checksum, int idx) {
> int retry = ETP_RETRY_COUNT;
> int error;
>
> do {
> - error = data->ops->write_fw_block(data->client,
> + error = data->ops->write_fw_block(data->client, page_size,
> page, checksum, idx);
> if (!error)
> return 0;
> @@ -460,21 +475,22 @@ static int __elan_update_firmware(struct
elan_tp_data *data,
> u16 boot_page_count;
> u16 sw_checksum = 0, fw_checksum = 0;
>
> - error = data->ops->prepare_fw_update(client);
> + error = data->ops->prepare_fw_update(client, data->ic_type);
> if (error)
> return error;
>
> iap_start_addr = get_unaligned_le16(&fw->data[ETP_IAP_START_ADDR *
> 2]);
>
> - boot_page_count = (iap_start_addr * 2) / ETP_FW_PAGE_SIZE;
> + boot_page_count = (iap_start_addr * 2) / data->fw_page_size;
> for (i = boot_page_count; i < data->fw_validpage_count; i++) {
> u16 checksum = 0;
> - const u8 *page = &fw->data[i * ETP_FW_PAGE_SIZE];
> + const u8 *page = &fw->data[i * data->fw_page_size];
>
> - for (j = 0; j < ETP_FW_PAGE_SIZE; j += 2)
> + for (j = 0; j < data->fw_page_size; j += 2)
> checksum += ((page[j + 1] << 8) | page[j]);
>
> - error = elan_write_fw_block(data, page, checksum, i);
> + error = elan_write_fw_block(data, data->fw_page_size,
> + page, checksum, i);
> if (error) {
> dev_err(dev, "write page %d fail: %d\n", i, error);
> return error;
> diff --git a/drivers/input/mouse/elan_i2c_i2c.c
> b/drivers/input/mouse/elan_i2c_i2c.c
> index 058b35b1f9a9..91ef0c7bda43 100644
> --- a/drivers/input/mouse/elan_i2c_i2c.c
> +++ b/drivers/input/mouse/elan_i2c_i2c.c
> @@ -19,6 +19,7 @@
> #include <linux/interrupt.h>
> #include <linux/jiffies.h>
> #include <linux/kernel.h>
> +#include <linux/slab.h>
> #include <linux/sched.h>
> #include <asm/unaligned.h>
>
> @@ -43,6 +44,7 @@
> #define ETP_I2C_RESOLUTION_CMD 0x0108
> #define ETP_I2C_PRESSURE_CMD 0x010A
> #define ETP_I2C_IAP_VERSION_CMD 0x0110
> +#define ETP_I2C_IAP_VERSION_CMD_OLD 0x0111
> #define ETP_I2C_SET_CMD 0x0300
> #define ETP_I2C_POWER_CMD 0x0307
> #define ETP_I2C_FW_CHECKSUM_CMD 0x030F
> @@ -53,6 +55,8 @@
> #define ETP_I2C_CALIBRATE_CMD 0x0316
> #define ETP_I2C_MAX_BASELINE_CMD 0x0317
> #define ETP_I2C_MIN_BASELINE_CMD 0x0318
> +#define ETP_I2C_IAP_TYPE_REG 0x0040
> +#define ETP_I2C_IAP_TYPE_CMD 0x0304
>
> #define ETP_I2C_REPORT_LEN 34
> #define ETP_I2C_DESC_LENGTH 30
> @@ -249,7 +253,11 @@ static int elan_i2c_get_pattern(struct i2c_client
*client, u8 *pattern)
> dev_err(&client->dev, "failed to get pattern: %d\n", error);
> return error;
> }
> - *pattern = val[1];
> +
> + if ((val[0] == 0xFF) && (val[1] == 0xFF))
> + *pattern = 0;
> + else
> + *pattern = val[1];
This needs a comment explaining why we are doing it.
>
> return 0;
> }
> @@ -259,6 +267,7 @@ static int elan_i2c_get_version(struct i2c_client
> *client, {
> int error;
> u8 pattern_ver;
> + u16 iap_cmd;
> u8 val[3];
>
> error = elan_i2c_get_pattern(client, &pattern_ver); @@ -266,9
> +275,14 @@ static int elan_i2c_get_version(struct i2c_client *client,
> dev_err(&client->dev, "failed to get pattern version\n");
> return error;
> }
> +
> + if (pattern_ver >= 0x01)
> + iap_cmd = ETP_I2C_IAP_VERSION_CMD;
> + else
> + iap_cmd = ETP_I2C_IAP_VERSION_CMD_OLD;
Can we make it
if (!iap)
cmd = ETP_I2C_FW_VERSION_CMD;
else if (pattern_ver == 0)
cmd = ETP_I2C_IAP_VERSION_CMD_OLD;
else
cmd = ETP_I2C_IAP_VERSION_CMD;
>
> error = elan_i2c_read_cmd(client,
> - iap ? ETP_I2C_IAP_VERSION_CMD :
> + iap ? iap_cmd :
> ETP_I2C_FW_VERSION_CMD,
> val);
> if (error) {
> @@ -277,7 +291,7 @@ static int elan_i2c_get_version(struct i2c_client
*client,
> return error;
> }
>
> - if (pattern_ver == 0x01)
> + if (pattern_ver >= 0x01)
> *version = iap ? val[1] : val[0];
> else
> *version = val[0];
> @@ -298,7 +312,7 @@ static int elan_i2c_get_sm_version(struct i2c_client
*client,
> return error;
> }
>
> - if (pattern_ver == 0x01) {
> + if (pattern_ver >= 0x01) {
> error = elan_i2c_read_cmd(client, ETP_I2C_IC_TYPE_CMD, val);
> if (error) {
> dev_err(&client->dev, "failed to get ic type: %d\n",
@@ -324,7
> +338,14 @@ static int elan_i2c_get_sm_version(struct i2c_client *client,
> return error;
> }
> *version = val[0];
> - *ic_type = val[1];
> +
> + error = elan_i2c_read_cmd(client, ETP_I2C_IAP_VERSION_CMD,
val);
> + if (error) {
> + dev_err(&client->dev, "failed to get ic type: %d\n",
> + error);
> + return error;
> + }
> + *ic_type = val[0];
>
> error = elan_i2c_read_cmd(client, ETP_I2C_NSM_VERSION_CMD,
> val);
> @@ -507,13 +528,53 @@ static int elan_i2c_set_flash_key(struct i2c_client
*client)
> return 0;
> }
>
> -static int elan_i2c_prepare_fw_update(struct i2c_client *client)
> +static int elan_read_write_iap_type(struct i2c_client *client) {
> + int error;
> + u16 constant;
> + u8 val[3];
> + int retry = 3;
> +
> + do {
> + error = elan_i2c_write_cmd(client, ETP_I2C_IAP_TYPE_CMD,
> + ETP_I2C_IAP_TYPE_REG);
> + if (error) {
> + dev_err(&client->dev,
> + "cannot write iap type: %d\n",
error);
> + return error;
> + }
> +
> + error = elan_i2c_read_cmd(client, ETP_I2C_IAP_TYPE_CMD,
val);
> + if (error) {
> + dev_err(&client->dev,
> + "failed to read iap type register: %d\n",
> + error);
> + return error;
> + }
> + constant = le16_to_cpup((__le16 *)val);
> + dev_dbg(&client->dev, "iap type reg: 0x%04x.\n", constant);
> +
> + if (constant == ETP_I2C_IAP_TYPE_REG)
> + return 0;
> +
> + } while (--retry > 0);
> +
> + dev_err(&client->dev, "cannot set iap type.\n");
> + return -EIO;
> +}
> +
> +static int elan_i2c_prepare_fw_update(struct i2c_client *client, u16
> +ic_type)
> {
> struct device *dev = &client->dev;
> int error;
> enum tp_mode mode;
> u8 val[3];
> u16 password;
> + u8 iap_version;
> +
> + error = elan_i2c_get_version(client, true, &iap_version);
> + if (error)
> + return error;
Haven't we queried IAP version already? Can we pass it in, along with
ic_type?
>
> /* Get FW in which mode (IAP_MODE/MAIN_MODE) */
> error = elan_i2c_iap_get_mode(client, &mode); @@ -546,6 +607,12 @@
> static int elan_i2c_prepare_fw_update(struct i2c_client *client)
> dev_err(dev, "wrong mode: %d\n", mode);
> return -EIO;
> }
> +
> + if ((ic_type >= 0x0D) && (iap_version >= 1)) {
No need for parenthesis around simple comparisons. Also, do we really need
to check both ic type and iap version? Is there ICs less than 0x0d with
newer IAP versions?
> + error = elan_read_write_iap_type(client);
> + if (error)
> + return error;
> + }
>
> /* Set flash key again */
> error = elan_i2c_set_flash_key(client); @@ -572,45 +639,51 @@ static
> int elan_i2c_prepare_fw_update(struct i2c_client *client)
> return 0;
> }
>
> -static int elan_i2c_write_fw_block(struct i2c_client *client,
> +static int elan_i2c_write_fw_block(struct i2c_client *client, u16
> +fw_page_size,
> const u8 *page, u16 checksum, int idx) {
> struct device *dev = &client->dev;
> - u8 page_store[ETP_FW_PAGE_SIZE + 4];
> + u8 *page_store = kcalloc(1, fw_page_size + 4, GFP_KERNEL);
Why kcalloc()? kzalloc() if you want cleared memoryi, but I think kmalloc
would be fine.
> u8 val[3];
> u16 result;
> - int ret, error;
> + int ret, error = 0;
>
> page_store[0] = ETP_I2C_IAP_REG_L;
> page_store[1] = ETP_I2C_IAP_REG_H;
> - memcpy(&page_store[2], page, ETP_FW_PAGE_SIZE);
> + memcpy(&page_store[2], page, fw_page_size);
> /* recode checksum at last two bytes */
> - put_unaligned_le16(checksum, &page_store[ETP_FW_PAGE_SIZE + 2]);
> + put_unaligned_le16(checksum, &page_store[fw_page_size + 2]);
>
> - ret = i2c_master_send(client, page_store, sizeof(page_store));
> - if (ret != sizeof(page_store)) {
> + ret = i2c_master_send(client, page_store, fw_page_size + 4);
> + if (ret != fw_page_size + 4) {
> error = ret < 0 ? ret : -EIO;
> dev_err(dev, "Failed to write page %d: %d\n", idx, error);
> - return error;
> + goto exit;
> }
>
> /* Wait for F/W to update one page ROM data. */
> - msleep(35);
> + if (fw_page_size == ETP_FW_PAGE_SIZE_512)
> + msleep(50);
> + else
> + msleep(35);
>
> error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CTRL_CMD, val);
> if (error) {
> dev_err(dev, "Failed to read IAP write result: %d\n",
error);
> - return error;
> + goto exit;
> }
>
> result = le16_to_cpup((__le16 *)val);
> if (result & (ETP_FW_IAP_PAGE_ERR | ETP_FW_IAP_INTF_ERR)) {
> dev_err(dev, "IAP reports failed write: %04hx\n",
> result);
> - return -EIO;
> + error = -EIO;
> + goto exit;
> }
>
> - return 0;
> +exit:
> + kfree(page_store);
> + return error;
> }
>
> static int elan_i2c_finish_fw_update(struct i2c_client *client, diff
> --git a/drivers/input/mouse/elan_i2c_smbus.c
> b/drivers/input/mouse/elan_i2c_smbus.c
> index 8c3185d54c73..1e762c90c894 100644
> --- a/drivers/input/mouse/elan_i2c_smbus.c
> +++ b/drivers/input/mouse/elan_i2c_smbus.c
> @@ -340,7 +340,7 @@ static int elan_smbus_set_flash_key(struct i2c_client
*client)
> return 0;
> }
>
> -static int elan_smbus_prepare_fw_update(struct i2c_client *client)
> +static int elan_smbus_prepare_fw_update(struct i2c_client *client,
> +u16 ic_type)
> {
> struct device *dev = &client->dev;
> int len;
> @@ -414,7 +414,7 @@ static int elan_smbus_prepare_fw_update(struct
> i2c_client *client) }
>
>
> -static int elan_smbus_write_fw_block(struct i2c_client *client,
> +static int elan_smbus_write_fw_block(struct i2c_client *client, u16
> +fw_page_size,
> const u8 *page, u16 checksum, int idx)
{
> struct device *dev = &client->dev;
> @@ -429,7 +429,7 @@ static int elan_smbus_write_fw_block(struct i2c_client
*client,
> */
> error = i2c_smbus_write_block_data(client,
> ETP_SMBUS_WRITE_FW_BLOCK,
> - ETP_FW_PAGE_SIZE / 2,
> + fw_page_size / 2,
> page);
> if (error) {
> dev_err(dev, "Failed to write page %d (part %d): %d\n", @@
-439,8
> +439,8 @@ static int elan_smbus_write_fw_block(struct i2c_client
> *client,
>
> error = i2c_smbus_write_block_data(client,
> ETP_SMBUS_WRITE_FW_BLOCK,
> - ETP_FW_PAGE_SIZE / 2,
> - page + ETP_FW_PAGE_SIZE / 2);
> + fw_page_size / 2,
> + page + fw_page_size / 2);
> if (error) {
> dev_err(dev, "Failed to write page %d (part %d): %d\n",
> idx, 2, error);
> --
> 2.17.1
>
Thanks.
--
Dmitry
