Hi, Missed to include Ben, for I2C patch, including him and copying others. Thanks, Vasanth. On Tue, Oct 30, 2012 at 9:31 PM, Vasanth Ananthan <vasanthananthan@xxxxxxxxx> wrote: > This patch adds a platform driver and I2C client driver for SATA PHY controller > > Signed-off-by: Vasanth Ananthan <vasanth.a@xxxxxxxxxxx> > --- > arch/arm/mach-exynos/include/mach/regs-sata.h | 29 +++ > drivers/ata/Makefile | 2 +- > drivers/ata/sata_exynos_phy.c | 300 +++++++++++++++++++++++++ > 3 files changed, 330 insertions(+), 1 deletions(-) > create mode 100644 arch/arm/mach-exynos/include/mach/regs-sata.h > create mode 100644 drivers/ata/sata_exynos_phy.c > > diff --git a/arch/arm/mach-exynos/include/mach/regs-sata.h b/arch/arm/mach-exynos/include/mach/regs-sata.h > new file mode 100644 > index 0000000..80dd564 > --- /dev/null > +++ b/arch/arm/mach-exynos/include/mach/regs-sata.h > @@ -0,0 +1,29 @@ > +/* > + * Copyright (c) 2010-2012 Samsung Electronics Co., Ltd. > + * http://www.samsung.com > + * > + * EXYNOS - SATA PHY controller definition > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > +*/ > + > +#define EXYNOS5_SATA_RESET 0x4 > +#define RESET_CMN_RST_N (1 << 1) > +#define LINK_RESET 0xF0000 > + > +#define EXYNOS5_SATA_MODE0 0x10 > + > +#define EXYNOS5_SATA_CTRL0 0x14 > +#define CTRL0_P0_PHY_CALIBRATED_SEL (1 << 9) > +#define CTRL0_P0_PHY_CALIBRATED (1 << 8) > + > +#define EXYNOS5_SATA_PHSATA_CTRLM 0xE0 > +#define PHCTRLM_REF_RATE (1 << 1) > +#define PHCTRLM_HIGH_SPEED (1 << 0) > + > +#define EXYNOS5_SATA_PHSATA_STATM 0xF0 > +#define PHSTATM_PLL_LOCKED (1 << 0) > + > +#define SATA_PHY_CON_RESET 0xF003F > diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile > index 43bb38e..6a3a8ee 100644 > --- a/drivers/ata/Makefile > +++ b/drivers/ata/Makefile > @@ -11,7 +11,7 @@ obj-$(CONFIG_SATA_SIL24) += sata_sil24.o > obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o > obj-$(CONFIG_SATA_HIGHBANK) += sata_highbank.o libahci.o > obj-$(CONFIG_SATA_PHY) += sata_phy.o > -obj-$(CONFIG_SATA_EXYNOS) += sata_exynos.o libahci.o > +obj-$(CONFIG_SATA_EXYNOS) += sata_exynos.o sata_exynos_phy.o libahci.o > > # SFF w/ custom DMA > obj-$(CONFIG_PDC_ADMA) += pdc_adma.o > diff --git a/drivers/ata/sata_exynos_phy.c b/drivers/ata/sata_exynos_phy.c > new file mode 100644 > index 0000000..ec61db5 > --- /dev/null > +++ b/drivers/ata/sata_exynos_phy.c > @@ -0,0 +1,300 @@ > +/* > + * Copyright (c) 2010-2012 Samsung Electronics Co., Ltd. > + * http://www.samsung.com > + * > + * EXYNOS - SATA PHY controller driver > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > +*/ > + > +#include <linux/module.h> > +#include <linux/device.h> > +#include <linux/platform_device.h> > +#include <linux/i2c.h> > +#include <linux/clk.h> > +#include <linux/delay.h> > +#include <linux/dma-mapping.h> > +#include <linux/ahci_platform.h> > +#include <linux/kernel.h> > +#include <linux/slab.h> > +#include <linux/list.h> > +#include <linux/io.h> > + > +#include <plat/cpu.h> > + > +#include <mach/irqs.h> > +#include <mach/map.h> > +#include <mach/regs-pmu.h> > +#include <mach/regs-sata.h> > + > +#include "sata_phy.h" > + > +#define SATA_TIME_LIMIT 1000 > + > +static struct i2c_client *i2c_client; > + > +static struct i2c_driver sataphy_i2c_driver; > + > +struct exynos_sata_phy { > + void __iomem *mmio; > + struct resource *mem; > + struct clk *clk; > +}; > + > +static bool sata_is_reg(void __iomem *base, u32 reg, u32 checkbit, u32 status) > +{ > + if ((readl(base + reg) & checkbit) == status) > + return true; > + else > + return false; > +} > + > +static bool wait_for_reg_status(void __iomem *base, u32 reg, u32 checkbit, > + u32 status) > +{ > + u16 time_limit_cnt = 0; > + while (!sata_is_reg(base, reg, checkbit, status)) { > + if (time_limit_cnt == SATA_TIME_LIMIT) > + return false; > + udelay(1000); > + time_limit_cnt++; > + } > + return true; > +} > + > +static int sataphy_init(struct sata_phy *phy) > +{ > + int ret; > + u32 val; > + > + /* Values to be written to enable 40 bits interface */ > + u8 buf[] = { 0x3A, 0x0B }; > + > + struct exynos_sata_phy *sata_phy; > + > + if (!i2c_client) > + return -EPROBE_DEFER; > + > + sata_phy = (struct exynos_sata_phy *)phy->priv_data; > + > + clk_enable(sata_phy->clk); > + > + writel(S5P_PMU_SATA_PHY_CONTROL_EN, EXYNOS5_SATA_PHY_CONTROL); > + > + val = 0; > + writel(val, sata_phy->mmio + EXYNOS5_SATA_RESET); > + > + val = readl(sata_phy->mmio + EXYNOS5_SATA_RESET); > + val |= 0xFF; > + writel(val, sata_phy->mmio + EXYNOS5_SATA_RESET); > + > + val = readl(sata_phy->mmio + EXYNOS5_SATA_RESET); > + val |= LINK_RESET; > + writel(val, sata_phy->mmio + EXYNOS5_SATA_RESET); > + > + val = readl(sata_phy->mmio + EXYNOS5_SATA_RESET); > + val |= RESET_CMN_RST_N; > + writel(val, sata_phy->mmio + EXYNOS5_SATA_RESET); > + > + val = readl(sata_phy->mmio + EXYNOS5_SATA_PHSATA_CTRLM); > + val &= ~PHCTRLM_REF_RATE; > + writel(val, sata_phy->mmio + EXYNOS5_SATA_PHSATA_CTRLM); > + > + /* High speed enable for Gen3 */ > + val = readl(sata_phy->mmio + EXYNOS5_SATA_PHSATA_CTRLM); > + val |= PHCTRLM_HIGH_SPEED; > + writel(val, sata_phy->mmio + EXYNOS5_SATA_PHSATA_CTRLM); > + > + val = readl(sata_phy->mmio + EXYNOS5_SATA_CTRL0); > + val |= CTRL0_P0_PHY_CALIBRATED_SEL | CTRL0_P0_PHY_CALIBRATED; > + writel(val, sata_phy->mmio + EXYNOS5_SATA_CTRL0); > + > + writel(SATA_PHY_GENERATION3, sata_phy->mmio + EXYNOS5_SATA_MODE0); > + > + ret = i2c_master_send(i2c_client, buf, sizeof(buf)); > + if (ret < 0) > + return -EINVAL; > + > + /* release cmu reset */ > + val = readl(sata_phy->mmio + EXYNOS5_SATA_RESET); > + val &= ~RESET_CMN_RST_N; > + writel(val, sata_phy->mmio + EXYNOS5_SATA_RESET); > + > + val = readl(sata_phy->mmio + EXYNOS5_SATA_RESET); > + val |= RESET_CMN_RST_N; > + writel(val, sata_phy->mmio + EXYNOS5_SATA_RESET); > + > + if (wait_for_reg_status(sata_phy->mmio, EXYNOS5_SATA_PHSATA_STATM, > + PHSTATM_PLL_LOCKED, 1)) { > + return 0; > + } > + return -EINVAL; > +} > + > +static int sataphy_shutdown(struct sata_phy *phy) > +{ > + > + struct exynos_sata_phy *sata_phy; > + > + sata_phy = (struct exynos_sata_phy *)phy->priv_data; > + > + clk_disable(sata_phy->clk); > + > + return 0; > +} > + > +static int __init sata_i2c_probe(struct i2c_client *client, > + const struct i2c_device_id *i2c_id) > +{ > + i2c_client = client; > + return 0; > +} > + > +static int __init sata_phy_probe(struct platform_device *pdev) > +{ > + struct exynos_sata_phy *sataphy; > + struct sata_phy *phy; > + struct resource *res; > + struct device *dev = &pdev->dev; > + int ret = 0; > + > + phy = kzalloc(sizeof(struct sata_phy), GFP_KERNEL); > + if (!phy) { > + dev_err(&pdev->dev, "failed to allocate memory\n"); > + ret = -ENOMEM; > + goto out; > + } > + > + sataphy = kzalloc(sizeof(struct exynos_sata_phy), GFP_KERNEL); > + if (!sataphy) { > + dev_err(dev, "failed to allocate memory\n"); > + ret = -ENOMEM; > + goto err0; > + } > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + if (!res) { > + dev_err(dev, "Could not find IO resource\n"); > + ret = -EINVAL; > + goto err1; > + } > + > + sataphy->mem = devm_request_mem_region(dev, res->start, > + resource_size(res), pdev->name); > + if (!sataphy->mem) { > + dev_err(dev, "Could not request IO resource\n"); > + ret = -EINVAL; > + goto err1; > + } > + > + sataphy->mmio = > + devm_ioremap(dev, res->start, resource_size(res)); > + if (!sataphy->mmio) { > + dev_err(dev, "failed to remap IO\n"); > + ret = -ENOMEM; > + goto err2; > + } > + > + sataphy->clk = devm_clk_get(dev, "sata-phy"); > + if (IS_ERR(sataphy->clk)) { > + dev_err(dev, "failed to get clk for PHY\n"); > + ret = PTR_ERR(sataphy->clk); > + goto err3; > + } > + > + phy->init = sataphy_init; > + phy->shutdown = sataphy_shutdown; > + phy->priv_data = (void *)sataphy; > + phy->dev = dev; > + > + ret = sata_add_phy(phy, SATA_PHY_GENERATION3); > + if (ret < 0) > + goto err4; > + > + ret = i2c_add_driver(&sataphy_i2c_driver); > + if (ret < 0) > + goto err5; > + > + platform_set_drvdata(pdev, phy); > + > + return ret; > + > + err5: > + sata_remove_phy(phy); > + > + err4: > + clk_disable(sataphy->clk); > + devm_clk_put(dev, sataphy->clk); > + > + err3: > + devm_iounmap(dev, sataphy->mmio); > + > + err2: > + devm_release_mem_region(dev, res->start, resource_size(res)); > + > + err1: > + kfree(sataphy); > + > + err0: > + kfree(phy); > + > + out: > + return ret; > +} > + > +static int sata_phy_remove(struct platform_device *pdev) > +{ > + struct sata_phy *phy; > + struct exynos_sata_phy *sataphy; > + > + phy = platform_get_drvdata(pdev); > + > + sataphy = (struct exynos_sata_phy *)phy->priv_data; > + sata_remove_phy(phy); > + > + kfree(sataphy); > + kfree(phy); > + > + return 0; > +} > + > +static const struct of_device_id sata_phy_of_match[] = { > + { .compatible = "samsung,exynos5-sata-phy", }, > + {}, > +}; > + > +MODULE_DEVICE_TABLE(of, sata_phy_of_match); > + > +static const struct i2c_device_id phy_i2c_device_match[] = { > + { "sata-phy", 0 }, > +}; > + > +MODULE_DEVICE_TABLE(of, phy_i2c_device_match); > + > +static struct platform_driver sata_phy_driver = { > + .probe = sata_phy_probe, > + .remove = sata_phy_remove, > + .driver = { > + .name = "sata-phy", > + .owner = THIS_MODULE, > + .of_match_table = sata_phy_of_match, > + }, > +}; > + > +static struct i2c_driver sataphy_i2c_driver = { > + .driver = { > + .name = "sata-phy-i2c", > + .owner = THIS_MODULE, > + .of_match_table = phy_i2c_device_match, > + }, > + .probe = sata_i2c_probe, > + .id_table = phy_i2c_device_match, > +}; > + > +module_platform_driver(sata_phy_driver); > + > +MODULE_DESCRIPTION("EXYNOS SATA PHY DRIVER"); > +MODULE_AUTHOR("Vasanth Ananthan, <vasanth.a@xxxxxxxxxxx>"); > +MODULE_LICENSE("GPL"); > -- > 1.7.4.1 > -- Regards, Vasanth K A -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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