From: Simon Glass Date: Sat, 12 Mar 2016 05:07:21 +0000 (-0700) Subject: x86: broadwell: Add a SATA driver X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=d2c29d9a2ce94b28b47382db228993f3a4ee4e75;p=u-boot.git x86: broadwell: Add a SATA driver Add a SATA driver for broadwell. This supports connecting an SSD and the usual U-Boot commands to read and write data. Signed-off-by: Simon Glass Acked-by: Bin Meng --- diff --git a/arch/x86/cpu/broadwell/Makefile b/arch/x86/cpu/broadwell/Makefile index db60e308c7..d422a1c076 100644 --- a/arch/x86/cpu/broadwell/Makefile +++ b/arch/x86/cpu/broadwell/Makefile @@ -8,3 +8,4 @@ obj-y += cpu.o obj-y += iobp.o obj-y += pch.o obj-y += pinctrl_broadwell.o +obj-y += sata.o diff --git a/arch/x86/cpu/broadwell/sata.c b/arch/x86/cpu/broadwell/sata.c new file mode 100644 index 0000000000..dfb8486d06 --- /dev/null +++ b/arch/x86/cpu/broadwell/sata.c @@ -0,0 +1,269 @@ +/* + * Copyright (c) 2016 Google, Inc + * + * From coreboot src/soc/intel/broadwell/sata.c + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct sata_platdata { + int port_map; + uint port0_gen3_tx; + uint port1_gen3_tx; + uint port0_gen3_dtle; + uint port1_gen3_dtle; + + /* + * SATA DEVSLP Mux + * 0 = port 0 DEVSLP on DEVSLP0/GPIO33 + * 1 = port 3 DEVSLP on DEVSLP0/GPIO33 + */ + int devslp_mux; + + /* + * DEVSLP Disable + * 0: DEVSLP is enabled + * 1: DEVSLP is disabled + */ + int devslp_disable; +}; + +static void broadwell_sata_init(struct udevice *dev) +{ + struct sata_platdata *plat = dev_get_platdata(dev); + u32 reg32; + u8 *abar; + u16 reg16; + int port; + + debug("SATA: Initializing controller in AHCI mode.\n"); + + /* Set timings */ + dm_pci_write_config16(dev, IDE_TIM_PRI, IDE_DECODE_ENABLE); + dm_pci_write_config16(dev, IDE_TIM_SEC, IDE_DECODE_ENABLE); + + /* for AHCI, Port Enable is managed in memory mapped space */ + dm_pci_read_config16(dev, 0x92, ®16); + reg16 &= ~0xf; + reg16 |= 0x8000 | plat->port_map; + dm_pci_write_config16(dev, 0x92, reg16); + udelay(2); + + /* Setup register 98h */ + dm_pci_read_config32(dev, 0x98, ®32); + reg32 &= ~((1 << 31) | (1 << 30)); + reg32 |= 1 << 23; + reg32 |= 1 << 24; /* Enable MPHY Dynamic Power Gating */ + dm_pci_write_config32(dev, 0x98, reg32); + + /* Setup register 9Ch */ + reg16 = 0; /* Disable alternate ID */ + reg16 = 1 << 5; /* BWG step 12 */ + dm_pci_write_config16(dev, 0x9c, reg16); + + /* SATA Initialization register */ + reg32 = 0x183; + reg32 |= (plat->port_map ^ 0xf) << 24; + reg32 |= (plat->devslp_mux & 1) << 15; + dm_pci_write_config32(dev, 0x94, reg32); + + /* Initialize AHCI memory-mapped space */ + dm_pci_read_config32(dev, PCI_BASE_ADDRESS_5, ®32); + abar = (u8 *)reg32; + debug("ABAR: %p\n", abar); + + /* CAP (HBA Capabilities) : enable power management */ + clrsetbits_le32(abar + 0x00, 0x00020060 /* SXS+EMS+PMS */, + 0x0c006000 /* PSC+SSC+SALP+SSS */ | + 1 << 18); /* SAM: SATA AHCI MODE ONLY */ + + /* PI (Ports implemented) */ + writel(plat->port_map, abar + 0x0c); + (void) readl(abar + 0x0c); /* Read back 1 */ + (void) readl(abar + 0x0c); /* Read back 2 */ + + /* CAP2 (HBA Capabilities Extended)*/ + if (plat->devslp_disable) { + clrbits_le32(abar + 0x24, 1 << 3); + } else { + /* Enable DEVSLP */ + setbits_le32(abar + 0x24, 1 << 5 | 1 << 4 | 1 << 3 | 1 << 2); + + for (port = 0; port < 4; port++) { + if (!(plat->port_map & (1 << port))) + continue; + /* DEVSLP DSP */ + setbits_le32(abar + 0x144 + (0x80 * port), 1 << 1); + } + } + + /* Static Power Gating for unused ports */ + reg32 = readl(RCB_REG(0x3a84)); + /* Port 3 and 2 disabled */ + if ((plat->port_map & ((1 << 3)|(1 << 2))) == 0) + reg32 |= (1 << 24) | (1 << 26); + /* Port 1 and 0 disabled */ + if ((plat->port_map & ((1 << 1)|(1 << 0))) == 0) + reg32 |= (1 << 20) | (1 << 18); + writel(reg32, RCB_REG(0x3a84)); + + /* Set Gen3 Transmitter settings if needed */ + if (plat->port0_gen3_tx) + pch_iobp_update(SATA_IOBP_SP0_SECRT88, + ~(SATA_SECRT88_VADJ_MASK << + SATA_SECRT88_VADJ_SHIFT), + (plat->port0_gen3_tx & + SATA_SECRT88_VADJ_MASK) + << SATA_SECRT88_VADJ_SHIFT); + + if (plat->port1_gen3_tx) + pch_iobp_update(SATA_IOBP_SP1_SECRT88, + ~(SATA_SECRT88_VADJ_MASK << + SATA_SECRT88_VADJ_SHIFT), + (plat->port1_gen3_tx & + SATA_SECRT88_VADJ_MASK) + << SATA_SECRT88_VADJ_SHIFT); + + /* Set Gen3 DTLE DATA / EDGE registers if needed */ + if (plat->port0_gen3_dtle) { + pch_iobp_update(SATA_IOBP_SP0DTLE_DATA, + ~(SATA_DTLE_MASK << SATA_DTLE_DATA_SHIFT), + (plat->port0_gen3_dtle & SATA_DTLE_MASK) + << SATA_DTLE_DATA_SHIFT); + + pch_iobp_update(SATA_IOBP_SP0DTLE_EDGE, + ~(SATA_DTLE_MASK << SATA_DTLE_EDGE_SHIFT), + (plat->port0_gen3_dtle & SATA_DTLE_MASK) + << SATA_DTLE_EDGE_SHIFT); + } + + if (plat->port1_gen3_dtle) { + pch_iobp_update(SATA_IOBP_SP1DTLE_DATA, + ~(SATA_DTLE_MASK << SATA_DTLE_DATA_SHIFT), + (plat->port1_gen3_dtle & SATA_DTLE_MASK) + << SATA_DTLE_DATA_SHIFT); + + pch_iobp_update(SATA_IOBP_SP1DTLE_EDGE, + ~(SATA_DTLE_MASK << SATA_DTLE_EDGE_SHIFT), + (plat->port1_gen3_dtle & SATA_DTLE_MASK) + << SATA_DTLE_EDGE_SHIFT); + } + + /* + * Additional Programming Requirements for Power Optimizer + */ + + /* Step 1 */ + pch_common_sir_write(dev, 0x64, 0x883c9003); + + /* Step 2: SIR 68h[15:0] = 880Ah */ + reg32 = pch_common_sir_read(dev, 0x68); + reg32 &= 0xffff0000; + reg32 |= 0x880a; + pch_common_sir_write(dev, 0x68, reg32); + + /* Step 3: SIR 60h[3] = 1 */ + reg32 = pch_common_sir_read(dev, 0x60); + reg32 |= (1 << 3); + pch_common_sir_write(dev, 0x60, reg32); + + /* Step 4: SIR 60h[0] = 1 */ + reg32 = pch_common_sir_read(dev, 0x60); + reg32 |= (1 << 0); + pch_common_sir_write(dev, 0x60, reg32); + + /* Step 5: SIR 60h[1] = 1 */ + reg32 = pch_common_sir_read(dev, 0x60); + reg32 |= (1 << 1); + pch_common_sir_write(dev, 0x60, reg32); + + /* Clock Gating */ + pch_common_sir_write(dev, 0x70, 0x3f00bf1f); + pch_common_sir_write(dev, 0x54, 0xcf000f0f); + pch_common_sir_write(dev, 0x58, 0x00190000); + clrsetbits_le32(RCB_REG(0x333c), 0x00300000, 0x00c00000); + + dm_pci_read_config32(dev, 0x300, ®32); + reg32 |= 1 << 17 | 1 << 16 | 1 << 19; + reg32 |= 1 << 31 | 1 << 30 | 1 << 29; + dm_pci_write_config32(dev, 0x300, reg32); + + dm_pci_read_config32(dev, 0x98, ®32); + reg32 |= 1 << 29; + dm_pci_write_config32(dev, 0x98, reg32); + + /* Register Lock */ + dm_pci_read_config32(dev, 0x9c, ®32); + reg32 |= 1 << 31; + dm_pci_write_config32(dev, 0x9c, reg32); +} + +static int broadwell_sata_enable(struct udevice *dev) +{ + struct sata_platdata *plat = dev_get_platdata(dev); + struct gpio_desc desc; + u16 map; + int ret; + + /* + * Set SATA controller mode early so the resource allocator can + * properly assign IO/Memory resources for the controller. + */ + map = 0x0060; + + map |= (plat->port_map ^ 0x3f) << 8; + dm_pci_write_config16(dev, 0x90, map); + + ret = gpio_request_by_name(dev, "reset-gpio", 0, &desc, GPIOD_IS_OUT); + if (ret) + return ret; + + return 0; +} + +static int broadwell_sata_ofdata_to_platdata(struct udevice *dev) +{ + struct sata_platdata *plat = dev_get_platdata(dev); + const void *blob = gd->fdt_blob; + int node = dev->of_offset; + + plat->port_map = fdtdec_get_int(blob, node, "intel,sata-port-map", 0); + plat->port0_gen3_tx = fdtdec_get_int(blob, node, + "intel,sata-port0-gen3-tx", 0); + + return 0; +} + +static int broadwell_sata_probe(struct udevice *dev) +{ + if (!(gd->flags & GD_FLG_RELOC)) + return broadwell_sata_enable(dev); + else + broadwell_sata_init(dev); + + return 0; +} + +static const struct udevice_id broadwell_ahci_ids[] = { + { .compatible = "intel,wildcatpoint-ahci" }, + { } +}; + +U_BOOT_DRIVER(ahci_broadwell_drv) = { + .name = "ahci_broadwell", + .id = UCLASS_DISK, + .of_match = broadwell_ahci_ids, + .ofdata_to_platdata = broadwell_sata_ofdata_to_platdata, + .probe = broadwell_sata_probe, + .platdata_auto_alloc_size = sizeof(struct sata_platdata), +};