From 25bf7757b7ed4f571f7f5d2a26ed9d3fea4e7e2b Mon Sep 17 00:00:00 2001 From: Andrew Bresticker Date: Tue, 4 Mar 2014 11:06:13 -0800 Subject: [PATCH] tegra124: fix PLLU parameters Fix the PLLU parameters to match the recommended values from the TRM, and the values used by the kernel and LP0 blob. This includes adding support for setting an LFCON value. It appears that changing the PLLU parameters across suspend/resume causes XHCI stability issues after resume. BUG=chrome-os-partner:26326 TEST=XHCI works after LP0 suspend/resume on Nyan. BRANCH=none Original-Change-Id: Ia4af12fefeebe607803e7f2f03ee4802367b82c3 Original-Signed-off-by: Andrew Bresticker Original-Reviewed-on: https://chromium-review.googlesource.com/188752 Original-Reviewed-by: Julius Werner Original-Reviewed-by: Tom Warren (cherry picked from commit bbc8d92eb462e165c2378bcb3055a3a74b47a19b) Signed-off-by: Marc Jones Change-Id: I687d1709befc2f5dec094ee423f2ff824412996e Reviewed-on: http://review.coreboot.org/7411 Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks --- src/soc/nvidia/tegra124/clock.c | 31 +++++++++++++++++++------------ 1 file changed, 19 insertions(+), 12 deletions(-) diff --git a/src/soc/nvidia/tegra124/clock.c b/src/soc/nvidia/tegra124/clock.c index 7977bbe0d9..3855335402 100644 --- a/src/soc/nvidia/tegra124/clock.c +++ b/src/soc/nvidia/tegra124/clock.c @@ -35,8 +35,9 @@ struct pll_dividers { u32 n : 10; u32 m : 8; u32 p : 4; - u32 cpcon: 4; - u32 : 6; + u32 cpcon : 4; + u32 lfcon : 4; + u32 : 2; }; /* Some PLLs have more restrictive divider bit lengths or are missing some @@ -66,7 +67,8 @@ struct pllu_dividers { u32 p : 1; u32 : 3; u32 cpcon : 4; - u32 : 6; + u32 lfcon : 4; + u32 : 2; }; union __attribute__((transparent_union)) pll_fields { @@ -98,7 +100,7 @@ struct { .pllp = {.n = 34, .m = 1, .p = 0, .cpcon = 2}, .pllc = {.n = 50, .m = 1, .p = 0}, .plld = {.n = 283, .m = 12, .p = 0, .cpcon = 8}, /* 283 MHz */ - .pllu = {.n = 80, .m = 1, .p = 0, .cpcon = 3}, + .pllu = {.n = 960, .m = 12, .p = 0, .cpcon = 12, .lfcon = 2}, .plldp = {.n = 90, .m = 1, .p = 3}, /* 270 MHz */ .plld2 = {.n = 95, .m = 1, .p = 1}, /* 570 MHz */ }, @@ -108,7 +110,7 @@ struct { .pllp = {.n = 408, .m = 13, .p = 0, .cpcon = 8}, .pllc = {.n = 231, .m = 5, .p = 0}, /* 600.6 MHz */ .plld = {.n = 283, .m = 13, .p = 0, .cpcon = 8}, /* 283 MHz*/ - .pllu = {.n = 960, .m = 13, .p = 0, .cpcon = 12}, + .pllu = {.n = 960, .m = 13, .p = 0, .cpcon = 12, .lfcon = 2}, .plldp = {.n = 83, .m = 1, .p = 3}, /* 269.75 MHz */ .plld2 = {.n = 88, .m = 1, .p = 1}, /* 572 MHz */ }, @@ -118,7 +120,7 @@ struct { .pllp = {.n = 170, .m = 7, .p = 0, .cpcon = 4}, .pllc = {.n = 250, .m = 7, .p = 0}, .plld = {.n = 286, .m = 17, .p = 0, .cpcon = 8}, /* 282.6 MHz*/ - .pllu = {.n = 400, .m = 7, .p = 0, .cpcon = 8}, + .pllu = {.n = 400, .m = 7, .p = 0, .cpcon = 5, .lfcon = 2}, .plldp = {.n = 64, .m = 1, .p = 3}, /* 268.8 MHz */ .plld2 = {.n = 68, .m = 1, .p = 1}, /* 571.2 MHz */ }, @@ -128,7 +130,7 @@ struct { .pllp = {.n = 85, .m = 4, .p = 0, .cpcon = 3}, .pllc = {.n = 125, .m = 4, .p = 0}, .plld = {.n = 251, .m = 17, .p = 0, .cpcon = 8}, /* 283.5 MHz */ - .pllu = {.n = 50, .m = 1, .p = 0, .cpcon = 2}, + .pllu = {.n = 200, .m = 4, .p = 0, .cpcon = 3, .lfcon = 2}, .plldp = {.n = 56, .m = 1, .p = 3}, /* 270.75 MHz */ .plld2 = {.n = 59, .m = 1, .p = 1}, /* 570 MHz */ }, @@ -138,7 +140,7 @@ struct { .pllp = {.n = 204, .m = 13, .p = 0, .cpcon = 5}, .pllc = {.n = 23, .m = 1, .p = 0}, /* 598 MHz */ .plld = {.n = 283, .m = 26, .p = 0, .cpcon = 8}, /* 283 MHz */ - .pllu = {.n = 480, .m = 13, .p = 0, .cpcon = 8}, + .pllu = {.n = 960, .m = 26, .p = 0, .cpcon = 12, .lfcon = 2}, .plldp = {.n = 83, .m = 2, .p = 3}, /* 266.50 MHz */ .plld2 = {.n = 88, .m = 2, .p = 1}, /* 570 MHz */ }, @@ -152,7 +154,7 @@ struct { .pllp = {.n = 85, .m = 4, .p = 0, .cpcon = 3}, .pllc = {.n = 125, .m = 4, .p = 0}, .plld = {.n = 125, .m = 17, .p = 0, .cpcon = 8}, /* 282.4 MHz */ - .pllu = {.n = 50, .m = 1, .p = 0, .cpcon = 2}, + .pllu = {.n = 200, .m = 4, .p = 0, .cpcon = 3, .lfcon = 2}, .plldp = {.n = 56, .m = 2, .p = 3}, /* 268 MHz */ .plld2 = {.n = 59, .m = 2, .p = 1}, /* 566 MHz */ }, @@ -166,7 +168,7 @@ struct { .pllp = {.n = 24, .m = 1, .p = 0, .cpcon = 2}, .pllc = {.n = 50, .m = 1, .p = 0}, .plld = {.n = 71, .m = 12, .p = 0, .cpcon = 8}, /* 284 MHz */ - .pllu = {.n = 80, .m = 1, .p = 0, .cpcon = 3}, + .pllu = {.n = 960, .m = 12, .p = 0, .cpcon = 12, .lfcon = 2}, .plldp = {.n = 90, .m = 4, .p = 3}, /* 264 MHz */ .plld2 = {.n = 95, .m = 4, .p = 1}, /* 570 MHz */ }, @@ -224,11 +226,16 @@ static void init_pll(u32 *base, u32 *misc, const union pll_fields pll) u32 dividers = pll.div.n << PLL_BASE_DIVN_SHIFT | pll.div.m << PLL_BASE_DIVM_SHIFT | pll.div.p << PLL_BASE_DIVP_SHIFT; + u32 misc_con = pll.div.cpcon << PLL_MISC_CPCON_SHIFT | + pll.div.lfcon << PLL_MISC_LFCON_SHIFT; /* Write dividers but BYPASS the PLL while we're messing with it. */ writel(dividers | PLL_BASE_BYPASS, base); - /* Set CPCON field (defaults to 0 if it doesn't exist for this PLL) */ - writel(pll.div.cpcon << PLL_MISC_CPCON_SHIFT, misc); + /* + * Set CPCON and LFCON fields (default to 0 if it doesn't exist for + * this PLL) + */ + writel(misc_con, misc); /* enable PLL and take it back out of BYPASS (we don't wait for lock * because we assume that to be done by the time we start using it). */