From cb271f3ce969a0fc4ecf9fc4b5a28852509714ed Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Wed, 11 Feb 2015 12:44:55 +0800 Subject: 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 Signed-off-by: Peter Chen Signed-off-by: Greg Kroah-Hartman --- drivers/usb/chipidea/core.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) (limited to 'drivers/usb/chipidea/core.c') 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 ? */ -- cgit v1.2.3