diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-tegra/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/platsmp.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/powergate.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/tegra2_emc.c | 347 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/tegra2_emc.h | 24 |
5 files changed, 3 insertions, 373 deletions
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile index 019bb17..6fbfbb7 100644 --- a/arch/arm/mach-tegra/Makefile +++ b/arch/arm/mach-tegra/Makefile @@ -14,7 +14,6 @@ obj-y += sleep.o obj-y += tegra.o obj-$(CONFIG_CPU_IDLE) += cpuidle.o obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra20_speedo.o -obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra2_emc.o obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += sleep-tegra20.o obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += pm-tegra20.o ifeq ($(CONFIG_CPU_IDLE),y) diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c index eb72ae7..929d104 100644 --- a/arch/arm/mach-tegra/platsmp.c +++ b/arch/arm/mach-tegra/platsmp.c @@ -114,7 +114,7 @@ static int tegra30_boot_secondary(unsigned int cpu, struct task_struct *idle) /* Wait for the power to come up. */ timeout = jiffies + msecs_to_jiffies(100); - while (tegra_pmc_cpu_is_powered(cpu)) { + while (!tegra_pmc_cpu_is_powered(cpu)) { if (time_after(jiffies, timeout)) return -ETIMEDOUT; udelay(10); diff --git a/arch/arm/mach-tegra/powergate.c b/arch/arm/mach-tegra/powergate.c index 3d0c537..4cefc5c 100644 --- a/arch/arm/mach-tegra/powergate.c +++ b/arch/arm/mach-tegra/powergate.c @@ -484,6 +484,7 @@ int tegra_io_rail_power_on(int id) return 0; } +EXPORT_SYMBOL(tegra_io_rail_power_on); int tegra_io_rail_power_off(int id) { @@ -511,3 +512,4 @@ int tegra_io_rail_power_off(int id) return 0; } +EXPORT_SYMBOL(tegra_io_rail_power_off); diff --git a/arch/arm/mach-tegra/tegra2_emc.c b/arch/arm/mach-tegra/tegra2_emc.c deleted file mode 100644 index 3ae4a7f..0000000 --- a/arch/arm/mach-tegra/tegra2_emc.c +++ /dev/null @@ -1,347 +0,0 @@ -/* - * Copyright (C) 2011 Google, Inc. - * - * Author: - * Colin Cross <ccross@android.com> - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ - -#include <linux/kernel.h> -#include <linux/device.h> -#include <linux/clk.h> -#include <linux/err.h> -#include <linux/io.h> -#include <linux/module.h> -#include <linux/of.h> -#include <linux/platform_device.h> -#include <linux/platform_data/tegra_emc.h> - -#include "tegra2_emc.h" -#include "fuse.h" - -#ifdef CONFIG_TEGRA_EMC_SCALING_ENABLE -static bool emc_enable = true; -#else -static bool emc_enable; -#endif -module_param(emc_enable, bool, 0644); - -static struct platform_device *emc_pdev; -static void __iomem *emc_regbase; - -static inline void emc_writel(u32 val, unsigned long addr) -{ - writel(val, emc_regbase + addr); -} - -static inline u32 emc_readl(unsigned long addr) -{ - return readl(emc_regbase + addr); -} - -static const unsigned long emc_reg_addr[TEGRA_EMC_NUM_REGS] = { - 0x2c, /* RC */ - 0x30, /* RFC */ - 0x34, /* RAS */ - 0x38, /* RP */ - 0x3c, /* R2W */ - 0x40, /* W2R */ - 0x44, /* R2P */ - 0x48, /* W2P */ - 0x4c, /* RD_RCD */ - 0x50, /* WR_RCD */ - 0x54, /* RRD */ - 0x58, /* REXT */ - 0x5c, /* WDV */ - 0x60, /* QUSE */ - 0x64, /* QRST */ - 0x68, /* QSAFE */ - 0x6c, /* RDV */ - 0x70, /* REFRESH */ - 0x74, /* BURST_REFRESH_NUM */ - 0x78, /* PDEX2WR */ - 0x7c, /* PDEX2RD */ - 0x80, /* PCHG2PDEN */ - 0x84, /* ACT2PDEN */ - 0x88, /* AR2PDEN */ - 0x8c, /* RW2PDEN */ - 0x90, /* TXSR */ - 0x94, /* TCKE */ - 0x98, /* TFAW */ - 0x9c, /* TRPAB */ - 0xa0, /* TCLKSTABLE */ - 0xa4, /* TCLKSTOP */ - 0xa8, /* TREFBW */ - 0xac, /* QUSE_EXTRA */ - 0x114, /* FBIO_CFG6 */ - 0xb0, /* ODT_WRITE */ - 0xb4, /* ODT_READ */ - 0x104, /* FBIO_CFG5 */ - 0x2bc, /* CFG_DIG_DLL */ - 0x2c0, /* DLL_XFORM_DQS */ - 0x2c4, /* DLL_XFORM_QUSE */ - 0x2e0, /* ZCAL_REF_CNT */ - 0x2e4, /* ZCAL_WAIT_CNT */ - 0x2a8, /* AUTO_CAL_INTERVAL */ - 0x2d0, /* CFG_CLKTRIM_0 */ - 0x2d4, /* CFG_CLKTRIM_1 */ - 0x2d8, /* CFG_CLKTRIM_2 */ -}; - -/* Select the closest EMC rate that is higher than the requested rate */ -long tegra_emc_round_rate(unsigned long rate) -{ - struct tegra_emc_pdata *pdata; - int i; - int best = -1; - unsigned long distance = ULONG_MAX; - - if (!emc_pdev) - return -EINVAL; - - pdata = emc_pdev->dev.platform_data; - - pr_debug("%s: %lu\n", __func__, rate); - - /* - * The EMC clock rate is twice the bus rate, and the bus rate is - * measured in kHz - */ - rate = rate / 2 / 1000; - - for (i = 0; i < pdata->num_tables; i++) { - if (pdata->tables[i].rate >= rate && - (pdata->tables[i].rate - rate) < distance) { - distance = pdata->tables[i].rate - rate; - best = i; - } - } - - if (best < 0) - return -EINVAL; - - pr_debug("%s: using %lu\n", __func__, pdata->tables[best].rate); - - return pdata->tables[best].rate * 2 * 1000; -} - -/* - * The EMC registers have shadow registers. When the EMC clock is updated - * in the clock controller, the shadow registers are copied to the active - * registers, allowing glitchless memory bus frequency changes. - * This function updates the shadow registers for a new clock frequency, - * and relies on the clock lock on the emc clock to avoid races between - * multiple frequency changes - */ -int tegra_emc_set_rate(unsigned long rate) -{ - struct tegra_emc_pdata *pdata; - int i; - int j; - - if (!emc_pdev) - return -EINVAL; - - pdata = emc_pdev->dev.platform_data; - - /* - * The EMC clock rate is twice the bus rate, and the bus rate is - * measured in kHz - */ - rate = rate / 2 / 1000; - - for (i = 0; i < pdata->num_tables; i++) - if (pdata->tables[i].rate == rate) - break; - - if (i >= pdata->num_tables) - return -EINVAL; - - pr_debug("%s: setting to %lu\n", __func__, rate); - - for (j = 0; j < TEGRA_EMC_NUM_REGS; j++) - emc_writel(pdata->tables[i].regs[j], emc_reg_addr[j]); - - emc_readl(pdata->tables[i].regs[TEGRA_EMC_NUM_REGS - 1]); - - return 0; -} - -#ifdef CONFIG_OF -static struct device_node *tegra_emc_ramcode_devnode(struct device_node *np) -{ - struct device_node *iter; - u32 reg; - - for_each_child_of_node(np, iter) { - if (of_property_read_u32(iter, "nvidia,ram-code", ®)) - continue; - if (reg == tegra_bct_strapping) - return of_node_get(iter); - } - - return NULL; -} - -static struct tegra_emc_pdata *tegra_emc_dt_parse_pdata( - struct platform_device *pdev) -{ - struct device_node *np = pdev->dev.of_node; - struct device_node *tnp, *iter; - struct tegra_emc_pdata *pdata; - int ret, i, num_tables; - - if (!np) - return NULL; - - if (of_find_property(np, "nvidia,use-ram-code", NULL)) { - tnp = tegra_emc_ramcode_devnode(np); - if (!tnp) - dev_warn(&pdev->dev, - "can't find emc table for ram-code 0x%02x\n", - tegra_bct_strapping); - } else - tnp = of_node_get(np); - - if (!tnp) - return NULL; - - num_tables = 0; - for_each_child_of_node(tnp, iter) - if (of_device_is_compatible(iter, "nvidia,tegra20-emc-table")) - num_tables++; - - if (!num_tables) { - pdata = NULL; - goto out; - } - - pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); - pdata->tables = devm_kzalloc(&pdev->dev, - sizeof(*pdata->tables) * num_tables, - GFP_KERNEL); - - i = 0; - for_each_child_of_node(tnp, iter) { - u32 prop; - - ret = of_property_read_u32(iter, "clock-frequency", &prop); - if (ret) { - dev_err(&pdev->dev, "no clock-frequency in %s\n", - iter->full_name); - continue; - } - pdata->tables[i].rate = prop; - - ret = of_property_read_u32_array(iter, "nvidia,emc-registers", - pdata->tables[i].regs, - TEGRA_EMC_NUM_REGS); - if (ret) { - dev_err(&pdev->dev, - "malformed emc-registers property in %s\n", - iter->full_name); - continue; - } - - i++; - } - pdata->num_tables = i; - -out: - of_node_put(tnp); - return pdata; -} -#else -static struct tegra_emc_pdata *tegra_emc_dt_parse_pdata( - struct platform_device *pdev) -{ - return NULL; -} -#endif - -static struct tegra_emc_pdata *tegra_emc_fill_pdata(struct platform_device *pdev) -{ - struct clk *c = clk_get_sys(NULL, "emc"); - struct tegra_emc_pdata *pdata; - unsigned long khz; - int i; - - WARN_ON(pdev->dev.platform_data); - BUG_ON(IS_ERR(c)); - - pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); - pdata->tables = devm_kzalloc(&pdev->dev, sizeof(*pdata->tables), - GFP_KERNEL); - - pdata->tables[0].rate = clk_get_rate(c) / 2 / 1000; - - for (i = 0; i < TEGRA_EMC_NUM_REGS; i++) - pdata->tables[0].regs[i] = emc_readl(emc_reg_addr[i]); - - pdata->num_tables = 1; - - khz = pdata->tables[0].rate; - dev_info(&pdev->dev, "no tables provided, using %ld kHz emc, " - "%ld kHz mem\n", khz * 2, khz); - - return pdata; -} - -static int tegra_emc_probe(struct platform_device *pdev) -{ - struct tegra_emc_pdata *pdata; - struct resource *res; - - if (!emc_enable) { - dev_err(&pdev->dev, "disabled per module parameter\n"); - return -ENODEV; - } - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - emc_regbase = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(emc_regbase)) - return PTR_ERR(emc_regbase); - - pdata = pdev->dev.platform_data; - - if (!pdata) - pdata = tegra_emc_dt_parse_pdata(pdev); - - if (!pdata) - pdata = tegra_emc_fill_pdata(pdev); - - pdev->dev.platform_data = pdata; - - emc_pdev = pdev; - - return 0; -} - -static struct of_device_id tegra_emc_of_match[] = { - { .compatible = "nvidia,tegra20-emc", }, - { }, -}; - -static struct platform_driver tegra_emc_driver = { - .driver = { - .name = "tegra-emc", - .owner = THIS_MODULE, - .of_match_table = tegra_emc_of_match, - }, - .probe = tegra_emc_probe, -}; - -static int __init tegra_emc_init(void) -{ - return platform_driver_register(&tegra_emc_driver); -} -device_initcall(tegra_emc_init); diff --git a/arch/arm/mach-tegra/tegra2_emc.h b/arch/arm/mach-tegra/tegra2_emc.h deleted file mode 100644 index f61409b..0000000 --- a/arch/arm/mach-tegra/tegra2_emc.h +++ /dev/null @@ -1,24 +0,0 @@ -/* - * Copyright (C) 2011 Google, Inc. - * - * Author: - * Colin Cross <ccross@android.com> - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ - -#ifndef __MACH_TEGRA_TEGRA2_EMC_H_ -#define __MACH_TEGRA_TEGRA2_EMC_H - -int tegra_emc_set_rate(unsigned long rate); -long tegra_emc_round_rate(unsigned long rate); - -#endif |
