/* * arch/arm/mach-spear13xx/spear1340.c * * SPEAr1340 machine source file * * Copyright (C) 2012 ST Microelectronics * Viresh Kumar * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */ #define pr_fmt(fmt) "SPEAr1340: " fmt #include #include #include #include #include #include "generic.h" #include /* FIXME: Move SATA PHY code into a standalone driver */ /* Base addresses */ #define SPEAR1340_SATA_BASE UL(0xB1000000) /* Power Management Registers */ #define SPEAR1340_PCM_CFG (VA_MISC_BASE + 0x100) #define SPEAR1340_PCM_WKUP_CFG (VA_MISC_BASE + 0x104) #define SPEAR1340_SWITCH_CTR (VA_MISC_BASE + 0x108) #define SPEAR1340_PERIP1_SW_RST (VA_MISC_BASE + 0x318) #define SPEAR1340_PERIP2_SW_RST (VA_MISC_BASE + 0x31C) #define SPEAR1340_PERIP3_SW_RST (VA_MISC_BASE + 0x320) /* PCIE - SATA configuration registers */ #define SPEAR1340_PCIE_SATA_CFG (VA_MISC_BASE + 0x424) /* PCIE CFG MASks */ #define SPEAR1340_PCIE_CFG_DEVICE_PRESENT (1 << 11) #define SPEAR1340_PCIE_CFG_POWERUP_RESET (1 << 10) #define SPEAR1340_PCIE_CFG_CORE_CLK_EN (1 << 9) #define SPEAR1340_PCIE_CFG_AUX_CLK_EN (1 << 8) #define SPEAR1340_SATA_CFG_TX_CLK_EN (1 << 4) #define SPEAR1340_SATA_CFG_RX_CLK_EN (1 << 3) #define SPEAR1340_SATA_CFG_POWERUP_RESET (1 << 2) #define SPEAR1340_SATA_CFG_PM_CLK_EN (1 << 1) #define SPEAR1340_PCIE_SATA_SEL_PCIE (0) #define SPEAR1340_PCIE_SATA_SEL_SATA (1) #define SPEAR1340_SATA_PCIE_CFG_MASK 0xF1F #define SPEAR1340_PCIE_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_PCIE | \ SPEAR1340_PCIE_CFG_AUX_CLK_EN | \ SPEAR1340_PCIE_CFG_CORE_CLK_EN | \ SPEAR1340_PCIE_CFG_POWERUP_RESET | \ SPEAR1340_PCIE_CFG_DEVICE_PRESENT) #define SPEAR1340_SATA_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_SATA | \ SPEAR1340_SATA_CFG_PM_CLK_EN | \ SPEAR1340_SATA_CFG_POWERUP_RESET | \ SPEAR1340_SATA_CFG_RX_CLK_EN | \ SPEAR1340_SATA_CFG_TX_CLK_EN) #define SPEAR1340_PCIE_MIPHY_CFG (VA_MISC_BASE + 0x428) #define SPEAR1340_MIPHY_OSC_BYPASS_EXT (1 << 31) #define SPEAR1340_MIPHY_CLK_REF_DIV2 (1 << 27) #define SPEAR1340_MIPHY_CLK_REF_DIV4 (2 << 27) #define SPEAR1340_MIPHY_CLK_REF_DIV8 (3 << 27) #define SPEAR1340_MIPHY_PLL_RATIO_TOP(x) (x << 0) #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA \ (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \ SPEAR1340_MIPHY_CLK_REF_DIV2 | \ SPEAR1340_MIPHY_PLL_RATIO_TOP(60)) #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK \ (SPEAR1340_MIPHY_PLL_RATIO_TOP(120)) #define SPEAR1340_PCIE_SATA_MIPHY_CFG_PCIE \ (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \ SPEAR1340_MIPHY_PLL_RATIO_TOP(25)) /* SATA device registration */ static int sata_miphy_init(struct device *dev, void __iomem *addr) { writel(SPEAR1340_SATA_CFG_VAL, SPEAR1340_PCIE_SATA_CFG); writel(SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK, SPEAR1340_PCIE_MIPHY_CFG); /* Switch on sata power domain */ writel((readl(SPEAR1340_PCM_CFG) | (0x800)), SPEAR1340_PCM_CFG); msleep(20); /* Disable PCIE SATA Controller reset */ writel((readl(SPEAR1340_PERIP1_SW_RST) & (~0x1000)), SPEAR1340_PERIP1_SW_RST); msleep(20); return 0; } void sata_miphy_exit(struct device *dev) { writel(0, SPEAR1340_PCIE_SATA_CFG); writel(0, SPEAR1340_PCIE_MIPHY_CFG); /* Enable PCIE SATA Controller reset */ writel((readl(SPEAR1340_PERIP1_SW_RST) | (0x1000)), SPEAR1340_PERIP1_SW_RST); msleep(20); /* Switch off sata power domain */ writel((readl(SPEAR1340_PCM_CFG) & (~0x800)), SPEAR1340_PCM_CFG); msleep(20); } int sata_suspend(struct device *dev) { if (dev->power.power_state.event == PM_EVENT_FREEZE) return 0; sata_miphy_exit(dev); return 0; } int sata_resume(struct device *dev) { if (dev->power.power_state.event == PM_EVENT_THAW) return 0; return sata_miphy_init(dev, NULL); } static struct ahci_platform_data sata_pdata = { .init = sata_miphy_init, .exit = sata_miphy_exit, .suspend = sata_suspend, .resume = sata_resume, }; /* Add SPEAr1340 auxdata to pass platform data */ static struct of_dev_auxdata spear1340_auxdata_lookup[] __initdata = { OF_DEV_AUXDATA("snps,spear-ahci", SPEAR1340_SATA_BASE, NULL, &sata_pdata), {} }; static void __init spear1340_dt_init(void) { of_platform_populate(NULL, of_default_bus_match_table, spear1340_auxdata_lookup, NULL); } static const char * const spear1340_dt_board_compat[] = { "st,spear1340", "st,spear1340-evb", NULL, }; DT_MACHINE_START(SPEAR1340_DT, "ST SPEAr1340 SoC with Flattened Device Tree") .smp = smp_ops(spear13xx_smp_ops), .map_io = spear13xx_map_io, .init_time = spear13xx_timer_init, .init_machine = spear1340_dt_init, .restart = spear_restart, .dt_compat = spear1340_dt_board_compat, MACHINE_END