From patchwork Tue May 12 17:23:55 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rhyland Klein X-Patchwork-Id: 471443 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 0C5C5140D18 for ; Wed, 13 May 2015 03:31:14 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933528AbbELRaz (ORCPT ); Tue, 12 May 2015 13:30:55 -0400 Received: from hqemgate14.nvidia.com ([216.228.121.143]:1030 "EHLO hqemgate14.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933382AbbELR03 (ORCPT ); Tue, 12 May 2015 13:26:29 -0400 Received: from hqnvupgp08.nvidia.com (Not Verified[216.228.121.13]) by hqemgate14.nvidia.com id ; Tue, 12 May 2015 10:26:25 -0700 Received: from hqemhub02.nvidia.com ([172.20.12.94]) by hqnvupgp08.nvidia.com (PGP Universal service); Tue, 12 May 2015 10:24:07 -0700 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Tue, 12 May 2015 10:24:07 -0700 Received: from rklein-work.nvidia.com (172.20.144.16) by hqemhub02.nvidia.com (172.20.150.31) with Microsoft SMTP Server (TLS) id 8.3.342.0; Tue, 12 May 2015 10:26:27 -0700 From: Rhyland Klein To: Peter De Schrijver CC: Mike Turquette , Stephen Warren , Stephen Boyd , Thierry Reding , Alexandre Courbot , Bill Huang , Paul Walmsley , Jim Lin , Benson Leung , linux-clk@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, Rhyland Klein Subject: [PATCH v5 12/21] clk: tegra: pll: Add specialized logic for T210 Date: Tue, 12 May 2015 13:23:55 -0400 Message-ID: <1431451444-23155-14-git-send-email-rklein@nvidia.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1431451444-23155-1-git-send-email-rklein@nvidia.com> References: <1431451444-23155-1-git-send-email-rklein@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org On Tegra210 SoC's, the logic to enable several of the plls is different from previous generations. Therefore, add registeration functions specific to Tegra210 which will handle them appropriately. Signed-off-by: Rhyland Klein Reviewed-by: Benson Leung --- v5: - Removed unused variables. v4: - Fixed plle_tegra210_is_enabled callback typos v2: - Fixed plle logic. PLLE on Tegra210 has had its enable bit moved, so we can't use the default _clk_pll_enable/disable routines. Instead, manually set/clear the correct bit for PLLE within its functions. drivers/clk/tegra/clk-pll.c | 347 ++++++++++++++++++++++++++++++++++++++++++- drivers/clk/tegra/clk.h | 24 +++ 2 files changed, 369 insertions(+), 2 deletions(-) diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c index 54ebab2b85e5..2b1f672e3bdb 100644 --- a/drivers/clk/tegra/clk-pll.c +++ b/drivers/clk/tegra/clk-pll.c @@ -65,6 +65,7 @@ #define PLLE_BASE_DIVN_WIDTH 8 #define PLLE_BASE_DIVM_SHIFT 0 #define PLLE_BASE_DIVM_WIDTH 8 +#define PLLE_BASE_ENABLE BIT(31) #define PLLE_MISC_SETUP_BASE_SHIFT 16 #define PLLE_MISC_SETUP_BASE_MASK (0xffff << PLLE_MISC_SETUP_BASE_SHIFT) @@ -910,7 +911,8 @@ const struct clk_ops tegra_clk_plle_ops = { #if defined(CONFIG_ARCH_TEGRA_114_SOC) || \ defined(CONFIG_ARCH_TEGRA_124_SOC) || \ - defined(CONFIG_ARCH_TEGRA_132_SOC) + defined(CONFIG_ARCH_TEGRA_132_SOC) || \ + defined(CONFIG_ARCH_TEGRA_210_SOC) static int _pll_fixed_mdiv(struct tegra_clk_pll_params *pll_params, unsigned long parent_rate) @@ -1579,7 +1581,8 @@ struct clk *tegra_clk_register_plle(const char *name, const char *parent_name, #if defined(CONFIG_ARCH_TEGRA_114_SOC) || \ defined(CONFIG_ARCH_TEGRA_124_SOC) || \ - defined(CONFIG_ARCH_TEGRA_132_SOC) + defined(CONFIG_ARCH_TEGRA_132_SOC) || \ + defined(CONFIG_ARCH_TEGRA_210_SOC) static const struct clk_ops tegra_clk_pllxc_ops = { .is_enabled = clk_pll_is_enabled, .enable = clk_pll_enable, @@ -1958,3 +1961,343 @@ struct clk *tegra_clk_register_pllss(const char *name, const char *parent_name, return clk; } #endif + +#if defined(CONFIG_ARCH_TEGRA_210_SOC) +static int clk_plle_tegra210_enable(struct clk_hw *hw) +{ + struct tegra_clk_pll *pll = to_clk_pll(hw); + struct tegra_clk_pll_freq_table sel; + u32 val; + int ret; + unsigned long flags = 0; + unsigned long input_rate = clk_get_rate(clk_get_parent(hw->clk)); + + if (_get_table_rate(hw, &sel, pll->params->fixed_rate, input_rate)) + return -EINVAL; + + if (pll->lock) + spin_lock_irqsave(pll->lock, flags); + + val = pll_readl_base(pll); + val &= ~BIT(29); /* Disable lock override */ + pll_writel_base(val, pll); + + val = pll_readl(pll->params->aux_reg, pll); + val |= PLLE_AUX_ENABLE_SWCTL; + val &= ~PLLE_AUX_SEQ_ENABLE; + pll_writel(val, pll->params->aux_reg, pll); + udelay(1); + + val = pll_readl_misc(pll); + val |= PLLE_MISC_LOCK_ENABLE; + val |= PLLE_MISC_IDDQ_SW_CTRL; + val &= ~PLLE_MISC_IDDQ_SW_VALUE; + val |= PLLE_MISC_PLLE_PTS; + val |= PLLE_MISC_VREG_BG_CTRL_MASK | PLLE_MISC_VREG_CTRL_MASK; + pll_writel_misc(val, pll); + udelay(5); + + val = pll_readl(PLLE_SS_CTRL, pll); + val |= PLLE_SS_DISABLE; + pll_writel(val, PLLE_SS_CTRL, pll); + + val = pll_readl_base(pll); + val &= ~(divp_mask_shifted(pll) | divn_mask_shifted(pll) | + divm_mask_shifted(pll)); + val &= ~(PLLE_BASE_DIVCML_MASK << PLLE_BASE_DIVCML_SHIFT); + val |= sel.m << divm_shift(pll); + val |= sel.n << divn_shift(pll); + val |= sel.cpcon << PLLE_BASE_DIVCML_SHIFT; + pll_writel_base(val, pll); + udelay(1); + + val = pll_readl_base(pll); + val |= PLLE_BASE_ENABLE; + pll_writel_base(val, pll); + + ret = clk_pll_wait_for_lock(pll); + + if (ret < 0) + goto out; + + val = pll_readl(PLLE_SS_CTRL, pll); + val &= ~(PLLE_SS_CNTL_CENTER | PLLE_SS_CNTL_INVERT); + val &= ~PLLE_SS_COEFFICIENTS_MASK; + val |= PLLE_SS_COEFFICIENTS_VAL; + pll_writel(val, PLLE_SS_CTRL, pll); + val &= ~(PLLE_SS_CNTL_SSC_BYP | PLLE_SS_CNTL_BYPASS_SS); + pll_writel(val, PLLE_SS_CTRL, pll); + udelay(1); + val &= ~PLLE_SS_CNTL_INTERP_RESET; + pll_writel(val, PLLE_SS_CTRL, pll); + udelay(1); + + /* Enable hw control of xusb brick pll */ + val = pll_readl_misc(pll); + val &= ~PLLE_MISC_IDDQ_SW_CTRL; + pll_writel_misc(val, pll); + + val = pll_readl(pll->params->aux_reg, pll); + val |= (PLLE_AUX_USE_LOCKDET | PLLE_AUX_SEQ_START_STATE); + val &= ~(PLLE_AUX_ENABLE_SWCTL | PLLE_AUX_SS_SWCTL); + pll_writel(val, pll->params->aux_reg, pll); + udelay(1); + val |= PLLE_AUX_SEQ_ENABLE; + pll_writel(val, pll->params->aux_reg, pll); + + val = pll_readl(XUSBIO_PLL_CFG0, pll); + val |= (XUSBIO_PLL_CFG0_PADPLL_USE_LOCKDET | + XUSBIO_PLL_CFG0_SEQ_START_STATE); + val &= ~(XUSBIO_PLL_CFG0_CLK_ENABLE_SWCTL | + XUSBIO_PLL_CFG0_PADPLL_RESET_SWCTL); + pll_writel(val, XUSBIO_PLL_CFG0, pll); + udelay(1); + val |= XUSBIO_PLL_CFG0_SEQ_ENABLE; + pll_writel(val, XUSBIO_PLL_CFG0, pll); + + /* Enable hw control of SATA pll */ + val = pll_readl(SATA_PLL_CFG0, pll); + val &= ~SATA_PLL_CFG0_PADPLL_RESET_SWCTL; + val |= SATA_PLL_CFG0_PADPLL_USE_LOCKDET; + val |= SATA_PLL_CFG0_SEQ_START_STATE; + pll_writel(val, SATA_PLL_CFG0, pll); + + udelay(1); + + val = pll_readl(SATA_PLL_CFG0, pll); + val |= SATA_PLL_CFG0_SEQ_ENABLE; + pll_writel(val, SATA_PLL_CFG0, pll); + +out: + if (pll->lock) + spin_unlock_irqrestore(pll->lock, flags); + + return ret; +} + +static void clk_plle_tegra210_disable(struct clk_hw *hw) +{ + struct tegra_clk_pll *pll = to_clk_pll(hw); + unsigned long flags = 0; + u32 val; + + if (pll->lock) + spin_lock_irqsave(pll->lock, flags); + + val = pll_readl_base(pll); + val &= ~PLLE_BASE_ENABLE; + pll_writel_base(val, pll); + + val = pll_readl_misc(pll); + val |= PLLE_MISC_IDDQ_SW_CTRL | PLLE_MISC_IDDQ_SW_VALUE; + pll_writel_misc(val, pll); + udelay(1); + + if (pll->lock) + spin_unlock_irqrestore(pll->lock, flags); +} + +static int clk_plle_tegra210_is_enabled(struct clk_hw *hw) +{ + struct tegra_clk_pll *pll = to_clk_pll(hw); + u32 val; + + val = pll_readl_base(pll); + + return val & PLLE_BASE_ENABLE ? 1 : 0; +} + +static const struct clk_ops tegra_clk_plle_tegra210_ops = { + .is_enabled = clk_plle_tegra210_is_enabled, + .enable = clk_plle_tegra210_enable, + .disable = clk_plle_tegra210_disable, + .recalc_rate = clk_pll_recalc_rate, +}; + +struct clk *tegra_clk_register_plle_tegra210(const char *name, + const char *parent_name, + void __iomem *clk_base, unsigned long flags, + struct tegra_clk_pll_params *pll_params, + spinlock_t *lock) +{ + struct tegra_clk_pll *pll; + struct clk *clk; + u32 val, val_aux; + + pll = _tegra_init_pll(clk_base, NULL, pll_params, lock); + if (IS_ERR(pll)) + return ERR_CAST(pll); + + /* ensure parent is set to pll_re_vco */ + + val = pll_readl_base(pll); + val_aux = pll_readl(pll_params->aux_reg, pll); + + if (val & PLLE_BASE_ENABLE) { + if ((val_aux & PLLE_AUX_PLLRE_SEL) || + (val_aux & PLLE_AUX_PLLP_SEL)) + WARN(1, "pll_e enabled with unsupported parent %s\n", + (val_aux & PLLE_AUX_PLLP_SEL) ? "pllp_out0" : + "pll_re_vco"); + } else { + val_aux &= ~(PLLE_AUX_PLLRE_SEL | PLLE_AUX_PLLP_SEL); + pll_writel(val_aux, pll_params->aux_reg, pll); + } + + clk = _tegra_clk_register_pll(pll, name, parent_name, flags, + &tegra_clk_plle_tegra210_ops); + if (IS_ERR(clk)) + kfree(pll); + + return clk; +} + +struct clk *tegra_clk_register_pllc_tegra210(const char *name, + const char *parent_name, void __iomem *clk_base, + void __iomem *pmc, unsigned long flags, + struct tegra_clk_pll_params *pll_params, + spinlock_t *lock) +{ + struct clk *parent, *clk; + struct pdiv_map *p_tohw = pll_params->pdiv_tohw; + struct tegra_clk_pll *pll; + unsigned long parent_rate; + + if (!p_tohw) + return ERR_PTR(-EINVAL); + + parent = __clk_lookup(parent_name); + if (!parent) { + WARN(1, "parent clk %s of %s must be registered first\n", + name, parent_name); + return ERR_PTR(-EINVAL); + } + + parent_rate = __clk_get_rate(parent); + + pll_params->vco_min = _clip_vco_min(pll_params->vco_min, parent_rate); + + pll_params->flags |= TEGRA_PLL_BYPASS; + pll = _tegra_init_pll(clk_base, pmc, pll_params, lock); + if (IS_ERR(pll)) + return ERR_CAST(pll); + + clk = _tegra_clk_register_pll(pll, name, parent_name, flags, + &tegra_clk_pll_ops); + if (IS_ERR(clk)) + kfree(pll); + + return clk; +} + +struct clk *tegra_clk_register_pllxc_tegra210(const char *name, + const char *parent_name, void __iomem *clk_base, + void __iomem *pmc, unsigned long flags, + struct tegra_clk_pll_params *pll_params, + spinlock_t *lock) +{ + struct tegra_clk_pll *pll; + struct clk *clk, *parent; + unsigned long parent_rate; + + parent = __clk_lookup(parent_name); + if (!parent) { + WARN(1, "parent clk %s of %s must be registered first\n", + name, parent_name); + return ERR_PTR(-EINVAL); + } + + if (!pll_params->pdiv_tohw) + return ERR_PTR(-EINVAL); + + parent_rate = __clk_get_rate(parent); + + pll_params->vco_min = _clip_vco_min(pll_params->vco_min, parent_rate); + + pll = _tegra_init_pll(clk_base, pmc, pll_params, lock); + if (IS_ERR(pll)) + return ERR_CAST(pll); + + clk = _tegra_clk_register_pll(pll, name, parent_name, flags, + &tegra_clk_pll_ops); + if (IS_ERR(clk)) + kfree(pll); + + return clk; +} + +struct clk *tegra_clk_register_pllss_tegra210(const char *name, + const char *parent_name, void __iomem *clk_base, + unsigned long flags, + struct tegra_clk_pll_params *pll_params, + spinlock_t *lock) +{ + struct tegra_clk_pll *pll; + struct clk *clk, *parent; + struct tegra_clk_pll_freq_table cfg; + unsigned long parent_rate; + u32 val; + int i; + + if (!pll_params->div_nmp) + return ERR_PTR(-EINVAL); + + parent = __clk_lookup(parent_name); + if (!parent) { + WARN(1, "parent clk %s of %s must be registered first\n", + name, parent_name); + return ERR_PTR(-EINVAL); + } + + pll = _tegra_init_pll(clk_base, NULL, pll_params, lock); + if (IS_ERR(pll)) + return ERR_CAST(pll); + + val = pll_readl_base(pll); + val &= ~PLLSS_REF_SRC_SEL_MASK; + pll_writel_base(val, pll); + + parent_rate = __clk_get_rate(parent); + + pll_params->vco_min = _clip_vco_min(pll_params->vco_min, parent_rate); + + /* initialize PLL to minimum rate */ + + cfg.m = _pll_fixed_mdiv(pll_params, parent_rate); + cfg.n = cfg.m * pll_params->vco_min / parent_rate; + + for (i = 0; pll_params->pdiv_tohw[i].pdiv; i++) + ; + if (!i) { + kfree(pll); + return ERR_PTR(-EINVAL); + } + + cfg.p = pll_params->pdiv_tohw[i-1].hw_val; + + _update_pll_mnp(pll, &cfg); + + pll_writel_misc(PLLSS_MISC_DEFAULT, pll); + + val = pll_readl_base(pll); + if (val & PLL_BASE_ENABLE) { + if (val & BIT(pll_params->iddq_bit_idx)) { + WARN(1, "%s is on but IDDQ set\n", name); + kfree(pll); + return ERR_PTR(-EINVAL); + } + } else + val |= BIT(pll_params->iddq_bit_idx); + + val &= ~PLLSS_LOCK_OVERRIDE; + pll_writel_base(val, pll); + + clk = _tegra_clk_register_pll(pll, name, parent_name, flags, + &tegra_clk_pll_ops); + + if (IS_ERR(clk)) + kfree(pll); + + return clk; +} +#endif diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h index 12c3e7edba4c..74190ab4f579 100644 --- a/drivers/clk/tegra/clk.h +++ b/drivers/clk/tegra/clk.h @@ -334,6 +334,12 @@ struct clk *tegra_clk_register_pllxc(const char *name, const char *parent_name, struct tegra_clk_pll_params *pll_params, spinlock_t *lock); +struct clk *tegra_clk_register_pllxc_tegra210(const char *name, + const char *parent_name, void __iomem *clk_base, + void __iomem *pmc, unsigned long flags, + struct tegra_clk_pll_params *pll_params, + spinlock_t *lock); + struct clk *tegra_clk_register_pllm(const char *name, const char *parent_name, void __iomem *clk_base, void __iomem *pmc, unsigned long flags, @@ -358,6 +364,24 @@ struct clk *tegra_clk_register_plle_tegra114(const char *name, struct tegra_clk_pll_params *pll_params, spinlock_t *lock); +struct clk *tegra_clk_register_plle_tegra210(const char *name, + const char *parent_name, + void __iomem *clk_base, unsigned long flags, + struct tegra_clk_pll_params *pll_params, + spinlock_t *lock); + +struct clk *tegra_clk_register_pllc_tegra210(const char *name, + const char *parent_name, void __iomem *clk_base, + void __iomem *pmc, unsigned long flags, + struct tegra_clk_pll_params *pll_params, + spinlock_t *lock); + +struct clk *tegra_clk_register_pllss_tegra210(const char *name, + const char *parent_name, void __iomem *clk_base, + unsigned long flags, + struct tegra_clk_pll_params *pll_params, + spinlock_t *lock); + struct clk *tegra_clk_register_pllss(const char *name, const char *parent_name, void __iomem *clk_base, unsigned long flags, struct tegra_clk_pll_params *pll_params,