On Wed, 01 Aug 2018, Jouke Witteveen wrote:
> Modern Thinkpads have three character model designators. Previously, they
> would be accepted, but recorded incompletely. Revision matching extracted
> the wrong bytes from the ID string. This made the use of quirks for modern
> machines impossible.
>
> Fixes: 1b0eb5bc2413
> Signed-off-by: Jouke Witteveen <j.wittev...@gmail.com>
Acked-by: Henrique de Moraes Holschuh <h...@hmh.eng.br>
> This has now been tested on both 3-character models (Thinkpad 13) and two
> character models (Thinkpad 11e).
> The part one of this series is identical to the previously submitted patch.
>
> drivers/platform/x86/thinkpad_acpi.c | 98 ++++++++++++++--------------
> 1 file changed, 48 insertions(+), 50 deletions(-)
>
> diff --git a/drivers/platform/x86/thinkpad_acpi.c
> b/drivers/platform/x86/thinkpad_acpi.c
> index cae9b059..2cd3ca7e 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -358,9 +358,9 @@ struct thinkpad_id_data {
> char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
> char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
>
> - u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
> - u16 ec_model;
> - u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
> + u32 bios_model; /* 1Y = 0x3159, 0 = unknown */
> + u32 ec_model;
> + u16 bios_release; /* 1ZETK1WW = 0x4b31, 0 = unknown */
> u16 ec_release;
>
> char *model_str; /* ThinkPad T43 */
> @@ -444,17 +444,20 @@ do {
> \
> /*
> * Quirk handling helpers
> *
> - * ThinkPad IDs and versions seen in the field so far
> - * are two-characters from the set [0-9A-Z], i.e. base 36.
> + * ThinkPad IDs and versions seen in the field so far are
> + * two or three characters from the set [0-9A-Z], i.e. base 36.
> *
> * We use values well outside that range as specials.
> */
>
> -#define TPACPI_MATCH_ANY 0xffffU
> +#define TPACPI_MATCH_ANY 0xffffffffU
> +#define TPACPI_MATCH_ANY_VERSION 0xffffU
> #define TPACPI_MATCH_UNKNOWN 0U
>
> -/* TPID('1', 'Y') == 0x5931 */
> -#define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
> +/* TPID('1', 'Y') == 0x3159 */
> +#define TPID(__c1, __c2) (((__c1) << 8) | (__c2))
> +#define TPID3(__c1, __c2, __c3) (((__c1) << 16) | ((__c2) << 8) |
> (__c3))
> +#define TPVER TPID
>
> #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
> { .vendor = PCI_VENDOR_ID_IBM, \
> @@ -476,8 +479,8 @@ do {
> \
>
> struct tpacpi_quirk {
> unsigned int vendor;
> - u16 bios;
> - u16 ec;
> + u32 bios;
> + u32 ec;
> unsigned long quirks;
> };
>
> @@ -1647,16 +1650,16 @@ static void tpacpi_remove_driver_attributes(struct
> device_driver *drv)
> { .vendor = (__v), \
> .bios = TPID(__id1, __id2), \
> .ec = TPACPI_MATCH_ANY, \
> - .quirks = TPACPI_MATCH_ANY << 16 \
> - | (__bv1) << 8 | (__bv2) }
> + .quirks = TPACPI_MATCH_ANY_VERSION << 16 \
> + | TPVER(__bv1, __bv2) }
>
> #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
> __eid, __ev1, __ev2) \
> { .vendor = (__v), \
> .bios = TPID(__bid1, __bid2), \
> .ec = __eid, \
> - .quirks = (__ev1) << 24 | (__ev2) << 16 \
> - | (__bv1) << 8 | (__bv2) }
> + .quirks = TPVER(__ev1, __ev2) << 16 \
> + | TPVER(__bv1, __bv2) }
>
> #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
> TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
> @@ -1798,7 +1801,7 @@ static void __init tpacpi_check_outdated_fw(void)
> /* note that unknown versions are set to 0x0000 and we use that */
> if ((bios_version > thinkpad_id.bios_release) ||
> (ec_version > thinkpad_id.ec_release &&
> - ec_version != TPACPI_MATCH_ANY)) {
> + ec_version != TPACPI_MATCH_ANY_VERSION)) {
> /*
> * The changelogs would let us track down the exact
> * reason, but it is just too much of a pain to track
> @@ -9808,36 +9811,37 @@ static int __init ibm_init(struct ibm_init_struct
> *iibm)
>
> /* Probing */
>
> -static bool __pure __init tpacpi_is_fw_digit(const char c)
> +static char __init tpacpi_parse_fw_id(const char * const s,
> + u32 * model, u16 * release)
> {
> - return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
> -}
> + int i;
> +
> + if (!s || strlen(s) < 8)
> + goto invalid;
> +
> + for (i = 0; i < 8; i++)
> + if (!((s[i] >= '0' && s[i] <= '9') ||
> + (s[i] >= 'A' && s[i] <= 'Z')))
> + goto invalid;
>
> -static bool __pure __init tpacpi_is_valid_fw_id(const char * const s,
> - const char t)
> -{
> /*
> * Most models: xxyTkkWW (#.##c)
> * Ancient 570/600 and -SL lacks (#.##c)
> */
> - if (s && strlen(s) >= 8 &&
> - tpacpi_is_fw_digit(s[0]) &&
> - tpacpi_is_fw_digit(s[1]) &&
> - s[2] == t &&
> - (s[3] == 'T' || s[3] == 'N') &&
> - tpacpi_is_fw_digit(s[4]) &&
> - tpacpi_is_fw_digit(s[5]))
> - return true;
> + if (s[3] == 'T' || s[3] == 'N') {
> + *model = TPID(s[0], s[1]);
> + *release = TPVER(s[4], s[5]);
> + return s[2];
>
> /* New models: xxxyTkkW (#.##c); T550 and some others */
> - return s && strlen(s) >= 8 &&
> - tpacpi_is_fw_digit(s[0]) &&
> - tpacpi_is_fw_digit(s[1]) &&
> - tpacpi_is_fw_digit(s[2]) &&
> - s[3] == t &&
> - (s[4] == 'T' || s[4] == 'N') &&
> - tpacpi_is_fw_digit(s[5]) &&
> - tpacpi_is_fw_digit(s[6]);
> + } else if (s[4] == 'T' || s[4] == 'N') {
> + *model = TPID3(s[0], s[1], s[2]);
> + *release = TPVER(s[5], s[6]);
> + return s[3];
> + }
> +
> +invalid:
> + return '\0';
> }
>
> /* returns 0 - probe ok, or < 0 - probe error.
> @@ -9849,6 +9853,7 @@ static int __must_check __init get_thinkpad_model_data(
> const struct dmi_device *dev = NULL;
> char ec_fw_string[18];
> char const *s;
> + char t;
>
> if (!tp)
> return -EINVAL;
> @@ -9868,15 +9873,11 @@ static int __must_check __init
> get_thinkpad_model_data(
> return -ENOMEM;
>
> /* Really ancient ThinkPad 240X will fail this, which is fine */
> - if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') ||
> - tpacpi_is_valid_fw_id(tp->bios_version_str, 'C')))
> + t = tpacpi_parse_fw_id(tp->bios_version_str,
> + &tp->bios_model, &tp->bios_release);
> + if (t != 'E' && t != 'C')
> return 0;
>
> - tp->bios_model = tp->bios_version_str[0]
> - | (tp->bios_version_str[1] << 8);
> - tp->bios_release = (tp->bios_version_str[4] << 8)
> - | tp->bios_version_str[5];
> -
> /*
> * ThinkPad T23 or newer, A31 or newer, R50e or newer,
> * X32 or newer, all Z series; Some models must have an
> @@ -9895,12 +9896,9 @@ static int __must_check __init get_thinkpad_model_data(
> if (!tp->ec_version_str)
> return -ENOMEM;
>
> - if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
> - tp->ec_model = ec_fw_string[0]
> - | (ec_fw_string[1] << 8);
> - tp->ec_release = (ec_fw_string[4] << 8)
> - | ec_fw_string[5];
> - } else {
> + t = tpacpi_parse_fw_id(ec_fw_string,
> + &tp->ec_model, &tp->ec_release);
> + if (t != 'H') {
> pr_notice("ThinkPad firmware release %s doesn't
> match the known patterns\n",
> ec_fw_string);
> pr_notice("please report this to %s\n",
--
Henrique Holschuh
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