diff options
| author | Peter Chen <peter.chen@freescale.com> | 2015-02-11 07:44:55 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-18 18:19:10 +0300 |
| commit | cb271f3ce969a0fc4ecf9fc4b5a28852509714ed (patch) | |
| tree | 39f34575d899b8cfd0d347ba26564ad62a9bb39b /drivers | |
| parent | 655d32e9b2b2b912ff86de656eb620627b0df117 (diff) | |
| download | linux-cb271f3ce969a0fc4ecf9fc4b5a28852509714ed.tar.xz | |
usb: chipidea: add chipidea revision information
Define ci_get_revision API to know the controller revision
information according to chipidea 1.1a, 2.0a and 2.5a spec.
Besides, add one entry at struct ci_hdrc to indicate revision
information, it can be used for adding different code for
revisions, eg kinds of errata.
Reviewed-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/chipidea/bits.h | 10 | ||||
| -rw-r--r-- | drivers/usb/chipidea/ci.h | 14 | ||||
| -rw-r--r-- | drivers/usb/chipidea/core.c | 23 |
3 files changed, 45 insertions, 2 deletions
diff --git a/drivers/usb/chipidea/bits.h b/drivers/usb/chipidea/bits.h index ca57e3dcd3d5..e69424d6e423 100644 --- a/drivers/usb/chipidea/bits.h +++ b/drivers/usb/chipidea/bits.h @@ -15,6 +15,16 @@ #include <linux/usb/ehci_def.h> +/* + * ID + * For 1.x revision, bit24 - bit31 are reserved + * For 2.x revision, bit25 - bit28 are 0x2 + */ +#define TAG (0x1F << 16) +#define REVISION (0xF << 21) +#define VERSION (0xF << 25) +#define CIVERSION (0x7 << 29) + /* HCCPARAMS */ #define HCCPARAMS_LEN BIT(17) diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h index e53287aff916..c09381d4ca77 100644 --- a/drivers/usb/chipidea/ci.h +++ b/drivers/usb/chipidea/ci.h @@ -106,6 +106,18 @@ enum ci_role { CI_ROLE_END, }; +enum ci_revision { + CI_REVISION_1X = 10, /* Revision 1.x */ + CI_REVISION_20 = 20, /* Revision 2.0 */ + CI_REVISION_21, /* Revision 2.1 */ + CI_REVISION_22, /* Revision 2.2 */ + CI_REVISION_23, /* Revision 2.3 */ + CI_REVISION_24, /* Revision 2.4 */ + CI_REVISION_25, /* Revision 2.5 */ + CI_REVISION_25_PLUS, /* Revision above than 2.5 */ + CI_REVISION_UNKNOWN = 99, /* Unknown Revision */ +}; + /** * struct ci_role_driver - host/gadget role driver * @start: start this role @@ -181,6 +193,7 @@ struct hw_bank { * @supports_runtime_pm: if runtime pm is supported * @in_lpm: if the core in low power mode * @wakeup_int: if wakeup interrupt occur + * @rev: The revision number for controller */ struct ci_hdrc { struct device *dev; @@ -226,6 +239,7 @@ struct ci_hdrc { bool supports_runtime_pm; bool in_lpm; bool wakeup_int; + enum ci_revision rev; }; static inline struct ci_role_driver *ci_role(struct ci_hdrc *ci) diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 23373543a149..4b22d7cb6557 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -137,6 +137,22 @@ static int hw_alloc_regmap(struct ci_hdrc *ci, bool is_lpm) return 0; } +static enum ci_revision ci_get_revision(struct ci_hdrc *ci) +{ + int ver = hw_read_id_reg(ci, ID_ID, VERSION) >> __ffs(VERSION); + enum ci_revision rev = CI_REVISION_UNKNOWN; + + if (ver == 0x2) { + rev = hw_read_id_reg(ci, ID_ID, REVISION) + >> __ffs(REVISION); + rev += CI_REVISION_20; + } else if (ver == 0x0) { + rev = CI_REVISION_1X; + } + + return rev; +} + /** * hw_read_intr_enable: returns interrupt enable register * @@ -251,8 +267,11 @@ static int hw_device_init(struct ci_hdrc *ci, void __iomem *base) /* Clear all interrupts status bits*/ hw_write(ci, OP_USBSTS, 0xffffffff, 0xffffffff); - dev_dbg(ci->dev, "ChipIdea HDRC found, lpm: %d; cap: %p op: %p\n", - ci->hw_bank.lpm, ci->hw_bank.cap, ci->hw_bank.op); + ci->rev = ci_get_revision(ci); + + dev_dbg(ci->dev, + "ChipIdea HDRC found, revision: %d, lpm: %d; cap: %p op: %p\n", + ci->rev, ci->hw_bank.lpm, ci->hw_bank.cap, ci->hw_bank.op); /* setup lock mode ? */ |