6e8887f60f
This replaces an earlier patch from Viresh Kumar to move the spear platform over to the generic DMA binding. This version is now based on the merged multiplatform capable spear platform, rather than the separate spear13xx/3xx/6xx directories. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: Vinod Koul <vinod.koul@linux.intel.com> Cc: devicetree-discuss@lists.ozlabs.org Cc: Shiraz Hashim <shiraz.hashim@st.com> Cc: spear-devel@list.st.com
164 lines
4.9 KiB
C
164 lines
4.9 KiB
C
/*
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* arch/arm/mach-spear13xx/spear1340.c
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*
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* SPEAr1340 machine source file
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*
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* Copyright (C) 2012 ST Microelectronics
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* Viresh Kumar <viresh.linux@gmail.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#define pr_fmt(fmt) "SPEAr1340: " fmt
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#include <linux/ahci_platform.h>
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#include <linux/amba/serial.h>
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#include <linux/delay.h>
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#include <linux/of_platform.h>
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#include <linux/irqchip.h>
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#include <asm/mach/arch.h>
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#include "generic.h"
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#include <mach/spear.h>
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/* FIXME: Move SATA PHY code into a standalone driver */
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/* Base addresses */
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#define SPEAR1340_SATA_BASE UL(0xB1000000)
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/* Power Management Registers */
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#define SPEAR1340_PCM_CFG (VA_MISC_BASE + 0x100)
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#define SPEAR1340_PCM_WKUP_CFG (VA_MISC_BASE + 0x104)
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#define SPEAR1340_SWITCH_CTR (VA_MISC_BASE + 0x108)
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#define SPEAR1340_PERIP1_SW_RST (VA_MISC_BASE + 0x318)
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#define SPEAR1340_PERIP2_SW_RST (VA_MISC_BASE + 0x31C)
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#define SPEAR1340_PERIP3_SW_RST (VA_MISC_BASE + 0x320)
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/* PCIE - SATA configuration registers */
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#define SPEAR1340_PCIE_SATA_CFG (VA_MISC_BASE + 0x424)
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/* PCIE CFG MASks */
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#define SPEAR1340_PCIE_CFG_DEVICE_PRESENT (1 << 11)
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#define SPEAR1340_PCIE_CFG_POWERUP_RESET (1 << 10)
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#define SPEAR1340_PCIE_CFG_CORE_CLK_EN (1 << 9)
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#define SPEAR1340_PCIE_CFG_AUX_CLK_EN (1 << 8)
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#define SPEAR1340_SATA_CFG_TX_CLK_EN (1 << 4)
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#define SPEAR1340_SATA_CFG_RX_CLK_EN (1 << 3)
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#define SPEAR1340_SATA_CFG_POWERUP_RESET (1 << 2)
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#define SPEAR1340_SATA_CFG_PM_CLK_EN (1 << 1)
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#define SPEAR1340_PCIE_SATA_SEL_PCIE (0)
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#define SPEAR1340_PCIE_SATA_SEL_SATA (1)
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#define SPEAR1340_SATA_PCIE_CFG_MASK 0xF1F
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#define SPEAR1340_PCIE_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_PCIE | \
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SPEAR1340_PCIE_CFG_AUX_CLK_EN | \
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SPEAR1340_PCIE_CFG_CORE_CLK_EN | \
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SPEAR1340_PCIE_CFG_POWERUP_RESET | \
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SPEAR1340_PCIE_CFG_DEVICE_PRESENT)
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#define SPEAR1340_SATA_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_SATA | \
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SPEAR1340_SATA_CFG_PM_CLK_EN | \
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SPEAR1340_SATA_CFG_POWERUP_RESET | \
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SPEAR1340_SATA_CFG_RX_CLK_EN | \
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SPEAR1340_SATA_CFG_TX_CLK_EN)
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#define SPEAR1340_PCIE_MIPHY_CFG (VA_MISC_BASE + 0x428)
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#define SPEAR1340_MIPHY_OSC_BYPASS_EXT (1 << 31)
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#define SPEAR1340_MIPHY_CLK_REF_DIV2 (1 << 27)
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#define SPEAR1340_MIPHY_CLK_REF_DIV4 (2 << 27)
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#define SPEAR1340_MIPHY_CLK_REF_DIV8 (3 << 27)
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#define SPEAR1340_MIPHY_PLL_RATIO_TOP(x) (x << 0)
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#define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA \
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(SPEAR1340_MIPHY_OSC_BYPASS_EXT | \
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SPEAR1340_MIPHY_CLK_REF_DIV2 | \
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SPEAR1340_MIPHY_PLL_RATIO_TOP(60))
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#define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK \
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(SPEAR1340_MIPHY_PLL_RATIO_TOP(120))
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#define SPEAR1340_PCIE_SATA_MIPHY_CFG_PCIE \
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(SPEAR1340_MIPHY_OSC_BYPASS_EXT | \
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SPEAR1340_MIPHY_PLL_RATIO_TOP(25))
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/* SATA device registration */
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static int sata_miphy_init(struct device *dev, void __iomem *addr)
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{
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writel(SPEAR1340_SATA_CFG_VAL, SPEAR1340_PCIE_SATA_CFG);
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writel(SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK,
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SPEAR1340_PCIE_MIPHY_CFG);
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/* Switch on sata power domain */
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writel((readl(SPEAR1340_PCM_CFG) | (0x800)), SPEAR1340_PCM_CFG);
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msleep(20);
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/* Disable PCIE SATA Controller reset */
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writel((readl(SPEAR1340_PERIP1_SW_RST) & (~0x1000)),
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SPEAR1340_PERIP1_SW_RST);
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msleep(20);
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return 0;
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}
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void sata_miphy_exit(struct device *dev)
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{
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writel(0, SPEAR1340_PCIE_SATA_CFG);
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writel(0, SPEAR1340_PCIE_MIPHY_CFG);
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/* Enable PCIE SATA Controller reset */
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writel((readl(SPEAR1340_PERIP1_SW_RST) | (0x1000)),
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SPEAR1340_PERIP1_SW_RST);
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msleep(20);
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/* Switch off sata power domain */
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writel((readl(SPEAR1340_PCM_CFG) & (~0x800)), SPEAR1340_PCM_CFG);
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msleep(20);
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}
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int sata_suspend(struct device *dev)
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{
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if (dev->power.power_state.event == PM_EVENT_FREEZE)
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return 0;
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sata_miphy_exit(dev);
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return 0;
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}
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int sata_resume(struct device *dev)
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{
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if (dev->power.power_state.event == PM_EVENT_THAW)
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return 0;
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return sata_miphy_init(dev, NULL);
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}
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static struct ahci_platform_data sata_pdata = {
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.init = sata_miphy_init,
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.exit = sata_miphy_exit,
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.suspend = sata_suspend,
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.resume = sata_resume,
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};
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/* Add SPEAr1340 auxdata to pass platform data */
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static struct of_dev_auxdata spear1340_auxdata_lookup[] __initdata = {
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OF_DEV_AUXDATA("snps,spear-ahci", SPEAR1340_SATA_BASE, NULL,
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&sata_pdata),
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{}
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};
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static void __init spear1340_dt_init(void)
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{
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of_platform_populate(NULL, of_default_bus_match_table,
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spear1340_auxdata_lookup, NULL);
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}
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static const char * const spear1340_dt_board_compat[] = {
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"st,spear1340",
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"st,spear1340-evb",
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NULL,
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};
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DT_MACHINE_START(SPEAR1340_DT, "ST SPEAr1340 SoC with Flattened Device Tree")
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.smp = smp_ops(spear13xx_smp_ops),
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.map_io = spear13xx_map_io,
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.init_irq = irqchip_init,
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.init_time = spear13xx_timer_init,
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.init_machine = spear1340_dt_init,
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.restart = spear_restart,
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.dt_compat = spear1340_dt_board_compat,
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MACHINE_END
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