diff options
Diffstat (limited to 'target/linux/brcm47xx/patches-3.0/0029-bcma-add-function-to-check-every-10-s-if-a-reg-is-se.patch')
| -rw-r--r-- | target/linux/brcm47xx/patches-3.0/0029-bcma-add-function-to-check-every-10-s-if-a-reg-is-se.patch | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.0/0029-bcma-add-function-to-check-every-10-s-if-a-reg-is-se.patch b/target/linux/brcm47xx/patches-3.0/0029-bcma-add-function-to-check-every-10-s-if-a-reg-is-se.patch new file mode 100644 index 000000000..2c0462fea --- /dev/null +++ b/target/linux/brcm47xx/patches-3.0/0029-bcma-add-function-to-check-every-10-s-if-a-reg-is-se.patch @@ -0,0 +1,115 @@ +From 6e8ae6e2cee0e7e5939dc7042584c808366e61e0 Mon Sep 17 00:00:00 2001 +From: Hauke Mehrtens <hauke@hauke-m.de> +Date: Sun, 27 Nov 2011 14:01:01 +0100 +Subject: [PATCH 16/21] =?UTF-8?q?bcma:=20add=20function=20to=20check=20every?= + =?UTF-8?q?=2010=20=C2=B5s=20if=20a=20reg=20is=20set?= +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This function checks if a reg get set or cleared every 10 microseconds. +It is used in bcma_core_set_clockmode() and bcma_core_pll_ctl() to +reduce code duplication. In addition it is needed in the USB host +driver. + +Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> +--- + drivers/bcma/core.c | 48 ++++++++++++++++++++++++++++---------------- + include/linux/bcma/bcma.h | 2 + + 2 files changed, 32 insertions(+), 18 deletions(-) + +--- a/drivers/bcma/core.c ++++ b/drivers/bcma/core.c +@@ -51,11 +51,36 @@ int bcma_core_enable(struct bcma_device + } + EXPORT_SYMBOL_GPL(bcma_core_enable); + ++/* Wait for bitmask in a register to get set or cleared. ++ * timeout is in units of ten-microseconds. ++ */ ++int bcma_wait_bits(struct bcma_device *dev, u16 reg, u32 bitmask, int timeout, ++ int set) ++{ ++ int i; ++ u32 val; ++ ++ for (i = 0; i < timeout; i++) { ++ val = bcma_read32(dev, reg); ++ if (set) { ++ if ((val & bitmask) == bitmask) ++ return 0; ++ } else { ++ if (!(val & bitmask)) ++ return 0; ++ } ++ udelay(10); ++ } ++ pr_err("Timeout waiting for bitmask %08X on register %04X to %s.\n", ++ bitmask, reg, (set ? "set" : "clear")); ++ ++ return -ETIMEDOUT; ++} ++EXPORT_SYMBOL_GPL(bcma_wait_bits); ++ + void bcma_core_set_clockmode(struct bcma_device *core, + enum bcma_clkmode clkmode) + { +- u16 i; +- + WARN_ON(core->id.id != BCMA_CORE_CHIPCOMMON && + core->id.id != BCMA_CORE_PCIE && + core->id.id != BCMA_CORE_80211); +@@ -64,15 +89,8 @@ void bcma_core_set_clockmode(struct bcma + case BCMA_CLKMODE_FAST: + bcma_set32(core, BCMA_CLKCTLST, BCMA_CLKCTLST_FORCEHT); + udelay(64); +- for (i = 0; i < 1500; i++) { +- if (bcma_read32(core, BCMA_CLKCTLST) & +- BCMA_CLKCTLST_HAVEHT) { +- i = 0; +- break; +- } +- udelay(10); +- } +- if (i) ++ if (bcma_wait_bits(core, BCMA_CLKCTLST, BCMA_CLKCTLST_HAVEHT, ++ 1500, 1)) + pr_err("HT force timeout\n"); + break; + case BCMA_CLKMODE_DYNAMIC: +@@ -84,22 +102,12 @@ EXPORT_SYMBOL_GPL(bcma_core_set_clockmod + + void bcma_core_pll_ctl(struct bcma_device *core, u32 req, u32 status, bool on) + { +- u16 i; +- + WARN_ON(req & ~BCMA_CLKCTLST_EXTRESREQ); + WARN_ON(status & ~BCMA_CLKCTLST_EXTRESST); + + if (on) { + bcma_set32(core, BCMA_CLKCTLST, req); +- for (i = 0; i < 10000; i++) { +- if ((bcma_read32(core, BCMA_CLKCTLST) & status) == +- status) { +- i = 0; +- break; +- } +- udelay(10); +- } +- if (i) ++ if (bcma_wait_bits(core, BCMA_CLKCTLST, status, 10000, 1)) + pr_err("PLL enable timeout\n"); + } else { + pr_warn("Disabling PLL not supported yet!\n"); +--- a/include/linux/bcma/bcma.h ++++ b/include/linux/bcma/bcma.h +@@ -283,6 +283,9 @@ static inline void bcma_maskset16(struct + bcma_write16(cc, offset, (bcma_read16(cc, offset) & mask) | set); + } + ++extern int bcma_wait_bits(struct bcma_device *dev, u16 reg, u32 bitmask, ++ int timeout, int set); ++ + extern bool bcma_core_is_enabled(struct bcma_device *core); + extern void bcma_core_disable(struct bcma_device *core, u32 flags); + extern int bcma_core_enable(struct bcma_device *core, u32 flags); |