diff options
Diffstat (limited to 'target/linux/sunxi/patches-3.12/191-add-sunxi-ahci.patch')
| -rw-r--r-- | target/linux/sunxi/patches-3.12/191-add-sunxi-ahci.patch | 436 |
1 files changed, 436 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-3.12/191-add-sunxi-ahci.patch b/target/linux/sunxi/patches-3.12/191-add-sunxi-ahci.patch new file mode 100644 index 0000000000..9034be3101 --- /dev/null +++ b/target/linux/sunxi/patches-3.12/191-add-sunxi-ahci.patch @@ -0,0 +1,436 @@ +From b7f492ca20e480ea3402692e165f919f20145935 Mon Sep 17 00:00:00 2001 +From: Oliver Schinagl <oliver@schinagl.nl> +Date: Tue, 3 Dec 2013 12:07:01 +0100 +Subject: [PATCH] ARM: sunxi: Add an ahci-platform compatible AHCI driver for + the Allwinner SUNXi series of SoCs + +This patch adds support for the sunxi series of SoC's by allwinner. It +plugs into the ahci-platform framework. + +Note: Currently it uses a somewhat hackish approach that probably needs +a lot more work, but does the same as the IMX SoC's. + +Signed-off-by: Olliver Schinagl <oliver@schinagl.nl> +--- + .../devicetree/bindings/ata/ahci-sunxi.txt | 24 ++ + drivers/ata/Kconfig | 9 + + drivers/ata/Makefile | 1 + + drivers/ata/ahci_platform.c | 12 + + drivers/ata/ahci_sunxi.c | 305 +++++++++++++++++++++ + 5 files changed, 351 insertions(+) + create mode 100644 Documentation/devicetree/bindings/ata/ahci-sunxi.txt + create mode 100644 drivers/ata/ahci_sunxi.c + +diff --git a/Documentation/devicetree/bindings/ata/ahci-sunxi.txt b/Documentation/devicetree/bindings/ata/ahci-sunxi.txt +new file mode 100644 +index 0000000..0792fa5 +--- /dev/null ++++ b/Documentation/devicetree/bindings/ata/ahci-sunxi.txt +@@ -0,0 +1,24 @@ ++Allwinner SUNXI AHCI SATA Controller ++ ++SATA nodes are defined to describe on-chip Serial ATA controllers. ++Each SATA controller should have its own node. ++ ++Required properties: ++- compatible : compatible list, contains "allwinner,sun4i-a10-ahci" ++- reg : <registers mapping> ++- interrupts : <interrupt mapping for AHCI IRQ> ++- clocks : clocks for ACHI ++- clock-names : clock names for AHCI ++ ++Optional properties: ++- pwr-supply : regulator to control the power supply GPIO ++ ++Example: ++ ahci@01c18000 { ++ compatible = "allwinner,sun4i-a10-ahci"; ++ reg = <0x01c18000 0x1000>; ++ interrupts = <0 56 1>; ++ clocks = <&ahb_gates 25>, <&pll6 0>; ++ clock-names = "ahb_sata", "pll6_sata"; ++ pwr-supply = <®_ahci_5v>; ++ }; +diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig +index 4e73772..b87e2ba 100644 +--- a/drivers/ata/Kconfig ++++ b/drivers/ata/Kconfig +@@ -106,6 +106,15 @@ config AHCI_IMX + + If unsure, say N. + ++config AHCI_SUNXI ++ tristate "Allwinner sunxi AHCI SATA support" ++ depends on SATA_AHCI_PLATFORM && ARCH_SUNXI ++ help ++ This option enables support for the Allwinner sunxi SoC's ++ onboard AHCI SATA. ++ ++ If unsure, say N. ++ + config SATA_FSL + tristate "Freescale 3.0Gbps SATA support" + depends on FSL_SOC +diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile +index 46518c6..246050b 100644 +--- a/drivers/ata/Makefile ++++ b/drivers/ata/Makefile +@@ -11,6 +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_AHCI_IMX) += ahci_imx.o ++obj-$(CONFIG_AHCI_SUNXI) += ahci_sunxi.o + + # SFF w/ custom DMA + obj-$(CONFIG_PDC_ADMA) += pdc_adma.o +diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c +index 4b231ba..1046b44 100644 +--- a/drivers/ata/ahci_platform.c ++++ b/drivers/ata/ahci_platform.c +@@ -31,6 +31,7 @@ enum ahci_type { + AHCI, /* standard platform ahci */ + IMX53_AHCI, /* ahci on i.mx53 */ + STRICT_AHCI, /* delayed DMA engine start */ ++ SUNXI_AHCI, /* ahci on sunxi */ + }; + + static struct platform_device_id ahci_devtype[] = { +@@ -44,6 +45,9 @@ enum ahci_type { + .name = "strict-ahci", + .driver_data = STRICT_AHCI, + }, { ++ .name = "sunxi-ahci", ++ .driver_data = SUNXI_AHCI, ++ }, { + /* sentinel */ + } + }; +@@ -81,6 +85,14 @@ struct ata_port_operations ahci_platform_ops = { + .udma_mask = ATA_UDMA6, + .port_ops = &ahci_platform_ops, + }, ++ [SUNXI_AHCI] = { ++ AHCI_HFLAGS (AHCI_HFLAG_32BIT_ONLY | AHCI_HFLAG_NO_MSI | ++ AHCI_HFLAG_NO_PMP | AHCI_HFLAG_YES_NCQ), ++ .flags = AHCI_FLAG_COMMON, ++ .pio_mask = ATA_PIO4, ++ .udma_mask = ATA_UDMA6, ++ .port_ops = &ahci_platform_ops, ++ }, + }; + + static struct scsi_host_template ahci_platform_sht = { +diff --git a/drivers/ata/ahci_sunxi.c b/drivers/ata/ahci_sunxi.c +new file mode 100644 +index 0000000..982641f +--- /dev/null ++++ b/drivers/ata/ahci_sunxi.c +@@ -0,0 +1,305 @@ ++/* ++ * Allwinner sunxi AHCI SATA platform driver ++ * Copyright 2013 Olliver Schinagl <oliver@schinagl.nl> ++ * ++ * Based on the AHCI SATA platform driver by Freescale and Allwinner ++ * Based on code from ++ * Allwinner Technology Co., Ltd. <www.allwinnertech.com> ++ * Daniel Wang <danielwang@allwinnertech.com> ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms and conditions of the GNU General Public License, ++ * version 2, as published by the Free Software Foundation. ++ * ++ * This program is distributed in the hope 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. ++ * ++ * You should have received a copy of the GNU General Public License along with ++ * this program. If not, see <http://www.gnu.org/licenses/>. ++ */ ++ ++#include <linux/kernel.h> ++#include <linux/regulator/consumer.h> ++#include <linux/module.h> ++#include <linux/platform_device.h> ++#include <linux/mod_devicetable.h> ++#include <linux/of_device.h> ++#include <linux/ioport.h> ++#include <linux/device.h> ++#include <linux/gfp.h> ++#include <linux/clk.h> ++#include <linux/clk-provider.h> ++#include <linux/errno.h> ++#include <linux/ahci_platform.h> ++#include "ahci.h" ++ ++#define DRV_NAME "sunxi-sata" ++ ++#define AHCI_BISTAFR 0x00a0 ++#define AHCI_BISTCR 0x00a4 ++#define AHCI_BISTFCTR 0x00a8 ++#define AHCI_BISTSR 0x00ac ++#define AHCI_BISTDECR 0x00b0 ++#define AHCI_DIAGNR0 0x00b4 ++#define AHCI_DIAGNR1 0x00b8 ++#define AHCI_OOBR 0x00bc ++#define AHCI_PHYCS0R 0x00c0 ++#define AHCI_PHYCS1R 0x00c4 ++#define AHCI_PHYCS2R 0x00c8 ++#define AHCI_TIMER1MS 0x00e0 ++#define AHCI_GPARAM1R 0x00e8 ++#define AHCI_GPARAM2R 0x00ec ++#define AHCI_PPARAMR 0x00f0 ++#define AHCI_TESTR 0x00f4 ++#define AHCI_VERSIONR 0x00f8 ++#define AHCI_IDR 0x00fc ++#define AHCI_RWCR 0x00fc ++#define AHCI_P0DMACR 0x0170 ++#define AHCI_P0PHYCR 0x0178 ++#define AHCI_P0PHYSR 0x017c ++ ++struct sunxi_ahci_data { ++ struct platform_device *ahci_pdev; ++ struct regulator *regulator; ++ struct clk *sata_clk; ++ struct clk *ahb_clk; ++}; ++ ++static void sunxi_clrbits(void __iomem *reg, u32 clr_val) ++{ ++ u32 reg_val; ++ ++ reg_val = readl(reg); ++ reg_val &= ~(clr_val); ++ writel(reg_val, reg); ++} ++ ++static void sunxi_setbits(void __iomem *reg, u32 set_val) ++{ ++ u32 reg_val; ++ ++ reg_val = readl(reg); ++ reg_val |= set_val; ++ writel(reg_val, reg); ++} ++ ++static void sunxi_clrsetbits(void __iomem *reg, u32 clr_val, u32 set_val) ++{ ++ u32 reg_val; ++ ++ reg_val = readl(reg); ++ reg_val &= ~(clr_val); ++ reg_val |= set_val; ++ writel(reg_val, reg); ++} ++ ++static u32 sunxi_getbits(void __iomem *reg, u8 mask, u8 shift) ++{ ++ return (readl(reg) >> shift) & mask; ++} ++ ++static int sunxi_ahci_phy_init(struct device *dev, void __iomem *reg_base) ++{ ++ u32 reg_val; ++ int timeout; ++ ++ /* This magic is from the original code */ ++ writel(0, reg_base + AHCI_RWCR); ++ mdelay(5); ++ ++ sunxi_setbits(reg_base + AHCI_PHYCS1R, BIT(19)); ++ sunxi_clrsetbits(reg_base + AHCI_PHYCS0R, ++ (0x7 << 24), ++ (0x5 << 24) | BIT(23) | BIT(18)); ++ sunxi_clrsetbits(reg_base + AHCI_PHYCS1R, ++ (0x3 << 16) | (0x1f << 8) | (0x3 << 6), ++ (0x2 << 16) | (0x6 << 8) | (0x2 << 6)); ++ sunxi_setbits(reg_base + AHCI_PHYCS1R, BIT(28) | BIT(15)); ++ sunxi_clrbits(reg_base + AHCI_PHYCS1R, BIT(19)); ++ sunxi_clrsetbits(reg_base + AHCI_PHYCS0R, ++ (0x7 << 20), (0x3 << 20)); ++ sunxi_clrsetbits(reg_base + AHCI_PHYCS2R, ++ (0x1f << 5), (0x19 << 5)); ++ mdelay(5); ++ ++ sunxi_setbits(reg_base + AHCI_PHYCS0R, (0x1 << 19)); ++ ++ timeout = 0x100000; ++ do { ++ reg_val = sunxi_getbits(reg_base + AHCI_PHYCS0R, 0x7, 28); ++ } while (--timeout && (reg_val != 0x2)); ++ if (!timeout) ++ dev_err(dev, "PHY power up failed.\n"); ++ ++ sunxi_setbits(reg_base + AHCI_PHYCS2R, (0x1 << 24)); ++ ++ timeout = 0x100000; ++ do { ++ reg_val = sunxi_getbits(reg_base + AHCI_PHYCS2R, 0x1, 24); ++ } while (--timeout && reg_val); ++ if (!timeout) ++ dev_err(dev, "PHY calibration failed.\n"); ++ mdelay(15); ++ ++ writel(0x7, reg_base + AHCI_RWCR); ++ ++ return 0; ++} ++ ++static int sunxi_ahci_init(struct device *dev, void __iomem *reg_base) ++{ ++ struct sunxi_ahci_data *ahci_data; ++ int ret; ++ ++ ahci_data = dev_get_drvdata(dev->parent); ++ ++ ret = clk_prepare_enable(ahci_data->sata_clk); ++ if (ret < 0) ++ return ret; ++ ++ ret = clk_prepare_enable(ahci_data->ahb_clk); ++ if (ret < 0) ++ return ret; ++ ++ ret = regulator_enable(ahci_data->regulator); ++ if (ret) ++ return ret; ++ ++ return sunxi_ahci_phy_init(dev, reg_base); ++} ++ ++static void sunxi_ahci_exit(struct device *dev) ++{ ++ struct sunxi_ahci_data *ahci_data; ++ ++ ahci_data = dev_get_drvdata(dev->parent); ++ ++ regulator_disable(ahci_data->regulator); ++ ++ clk_disable_unprepare(ahci_data->ahb_clk); ++ clk_disable_unprepare(ahci_data->sata_clk); ++} ++ ++static struct ahci_platform_data sunxi_ahci_pdata = { ++ .init = sunxi_ahci_init, ++ .exit = sunxi_ahci_exit, ++}; ++ ++static int sunxi_ahci_remove(struct platform_device *pdev) ++{ ++ struct sunxi_ahci_data *ahci_data; ++ ++ ahci_data = platform_get_drvdata(pdev); ++ platform_device_unregister(ahci_data->ahci_pdev); ++ ++ dev_dbg(&pdev->dev, "driver unloaded\n"); ++ ++ return 0; ++} ++ ++static const struct of_device_id sunxi_ahci_of_match[] = { ++ { .compatible = "allwinner,sun4i-a10-ahci", .data = &sunxi_ahci_pdata}, ++ {/* sentinel */}, ++}; ++MODULE_DEVICE_TABLE(of, sunxi_ahci_of_match); ++ ++static int sunxi_ahci_probe(struct platform_device *pdev) ++{ ++ const struct ahci_platform_data *pdata; ++ const struct of_device_id *of_dev_id; ++ struct resource *mem, *irq, res[2]; ++ struct platform_device *ahci_pdev; ++ struct sunxi_ahci_data *ahci_data; ++ struct regulator *regulator; ++ int ret; ++ ++ regulator = devm_regulator_get(&pdev->dev, "pwr"); ++ if (IS_ERR(regulator)) { ++ ret = PTR_ERR(regulator); ++ if (ret != -EPROBE_DEFER) ++ dev_err(&pdev->dev, "no regulator found (%d)\n", ret); ++ return ret; ++ } ++ ++ ahci_data = devm_kzalloc(&pdev->dev, sizeof(*ahci_data), GFP_KERNEL); ++ if (!ahci_data) ++ return -ENOMEM; ++ ++ ahci_pdev = platform_device_alloc("sunxi-ahci", -1); ++ if (!ahci_pdev) ++ return -ENODEV; ++ ++ ahci_pdev->dev.parent = &pdev->dev; ++ ++ ahci_data->regulator = regulator; ++ ahci_data->ahb_clk = devm_clk_get(&pdev->dev, "ahb_sata"); ++ if (IS_ERR(ahci_data->ahb_clk)) { ++ ret = PTR_ERR(ahci_data->ahb_clk); ++ goto err_out; ++ } ++ ++ ahci_data->sata_clk = devm_clk_get(&pdev->dev, "pll6_sata"); ++ if (IS_ERR(ahci_data->sata_clk)) { ++ ret = PTR_ERR(ahci_data->sata_clk); ++ goto err_out; ++ } ++ ++ ahci_data->ahci_pdev = ahci_pdev; ++ platform_set_drvdata(pdev, ahci_data); ++ ++ ahci_pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); ++ ahci_pdev->dev.dma_mask = &ahci_pdev->dev.coherent_dma_mask; ++ ahci_pdev->dev.of_node = pdev->dev.of_node; ++ ++ of_dev_id = of_match_device(sunxi_ahci_of_match, &pdev->dev); ++ if (of_dev_id) { ++ pdata = of_dev_id->data; ++ } else { ++ ret = -EINVAL; ++ goto err_out; ++ } ++ ++ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); ++ if (!mem || !irq) { ++ ret = -ENOMEM; ++ goto err_out; ++ } ++ res[0] = *mem; ++ res[1] = *irq; ++ ret = platform_device_add_resources(ahci_pdev, res, 2); ++ if (ret) ++ goto err_out; ++ ++ ret = platform_device_add_data(ahci_pdev, pdata, sizeof(*pdata)); ++ if (ret) ++ goto err_out; ++ ++ ret = platform_device_add(ahci_pdev); ++ if (ret) ++ goto err_out; ++ ++ return 0; ++ ++err_out: ++ platform_device_put(ahci_pdev); ++ return ret; ++} ++ ++static struct platform_driver sunxi_ahci_driver = { ++ .probe = sunxi_ahci_probe, ++ .remove = sunxi_ahci_remove, ++ .driver = { ++ .name = DRV_NAME, ++ .owner = THIS_MODULE, ++ .of_match_table = sunxi_ahci_of_match, ++ }, ++}; ++module_platform_driver(sunxi_ahci_driver); ++ ++MODULE_DESCRIPTION("Allwinner sunxi AHCI SATA platform driver"); ++MODULE_AUTHOR("Olliver Schinagl <oliver@schinagl.nl>"); ++MODULE_LICENSE("GPL"); ++MODULE_ALIAS("ahci:sunxi"); +-- +1.8.5.1 + |