diff options
| author | Peter Chen <peter.chen@freescale.com> | 2015-02-11 04:44:55 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-18 15:19:10 (GMT) |
| commit | cb271f3ce969a0fc4ecf9fc4b5a28852509714ed (patch) | |
| tree | 39f34575d899b8cfd0d347ba26564ad62a9bb39b /drivers/usb/chipidea/core.c | |
| 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/usb/chipidea/core.c')
| -rw-r--r-- | drivers/usb/chipidea/core.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 2337354..4b22d7c 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 ? */ |