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376 lines
9.0 KiB
376 lines
9.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* drivers/usb/host/ehci-orion.c |
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* |
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* Tzachi Perelstein <[email protected]> |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/mbus.h> |
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#include <linux/clk.h> |
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#include <linux/platform_data/usb-ehci-orion.h> |
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#include <linux/of.h> |
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#include <linux/phy/phy.h> |
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#include <linux/of_device.h> |
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#include <linux/of_irq.h> |
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#include <linux/usb.h> |
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#include <linux/usb/hcd.h> |
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#include <linux/io.h> |
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#include <linux/dma-mapping.h> |
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#include "ehci.h" |
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#define rdl(off) readl_relaxed(hcd->regs + (off)) |
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#define wrl(off, val) writel_relaxed((val), hcd->regs + (off)) |
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#define USB_CMD 0x140 |
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#define USB_CMD_RUN BIT(0) |
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#define USB_CMD_RESET BIT(1) |
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#define USB_MODE 0x1a8 |
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#define USB_MODE_MASK GENMASK(1, 0) |
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#define USB_MODE_DEVICE 0x2 |
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#define USB_MODE_HOST 0x3 |
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#define USB_MODE_SDIS BIT(4) |
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#define USB_CAUSE 0x310 |
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#define USB_MASK 0x314 |
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#define USB_WINDOW_CTRL(i) (0x320 + ((i) << 4)) |
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#define USB_WINDOW_BASE(i) (0x324 + ((i) << 4)) |
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#define USB_IPG 0x360 |
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#define USB_PHY_PWR_CTRL 0x400 |
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#define USB_PHY_TX_CTRL 0x420 |
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#define USB_PHY_RX_CTRL 0x430 |
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#define USB_PHY_IVREF_CTRL 0x440 |
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#define USB_PHY_TST_GRP_CTRL 0x450 |
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#define USB_SBUSCFG 0x90 |
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/* BAWR = BARD = 3 : Align read/write bursts packets larger than 128 bytes */ |
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#define USB_SBUSCFG_BAWR_ALIGN_128B (0x3 << 6) |
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#define USB_SBUSCFG_BARD_ALIGN_128B (0x3 << 3) |
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/* AHBBRST = 3 : Align AHB Burst to INCR16 (64 bytes) */ |
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#define USB_SBUSCFG_AHBBRST_INCR16 (0x3 << 0) |
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#define USB_SBUSCFG_DEF_VAL (USB_SBUSCFG_BAWR_ALIGN_128B \ |
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| USB_SBUSCFG_BARD_ALIGN_128B \ |
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| USB_SBUSCFG_AHBBRST_INCR16) |
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#define DRIVER_DESC "EHCI orion driver" |
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#define hcd_to_orion_priv(h) ((struct orion_ehci_hcd *)hcd_to_ehci(h)->priv) |
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struct orion_ehci_hcd { |
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struct clk *clk; |
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struct phy *phy; |
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}; |
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static const char hcd_name[] = "ehci-orion"; |
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static struct hc_driver __read_mostly ehci_orion_hc_driver; |
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/* |
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* Implement Orion USB controller specification guidelines |
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*/ |
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static void orion_usb_phy_v1_setup(struct usb_hcd *hcd) |
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{ |
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/* The below GLs are according to the Orion Errata document */ |
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/* |
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* Clear interrupt cause and mask |
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*/ |
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wrl(USB_CAUSE, 0); |
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wrl(USB_MASK, 0); |
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/* |
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* Reset controller |
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*/ |
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wrl(USB_CMD, rdl(USB_CMD) | USB_CMD_RESET); |
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while (rdl(USB_CMD) & USB_CMD_RESET); |
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/* |
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* GL# USB-10: Set IPG for non start of frame packets |
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* Bits[14:8]=0xc |
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*/ |
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wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00); |
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/* |
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* GL# USB-9: USB 2.0 Power Control |
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* BG_VSEL[7:6]=0x1 |
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*/ |
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wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40); |
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/* |
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* GL# USB-1: USB PHY Tx Control - force calibration to '8' |
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* TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8 |
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*/ |
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wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040); |
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/* |
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* GL# USB-3 GL# USB-9: USB PHY Rx Control |
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* RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0, |
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* CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1 |
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*/ |
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wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010); |
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/* |
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* GL# USB-3 GL# USB-9: USB PHY IVREF Control |
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* PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0 |
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*/ |
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wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32); |
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/* |
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* GL# USB-3 GL# USB-9: USB PHY Test Group Control |
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* REG_FIFO_SQ_RST[15]=0 |
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*/ |
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wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000); |
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/* |
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* Stop and reset controller |
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*/ |
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wrl(USB_CMD, rdl(USB_CMD) & ~USB_CMD_RUN); |
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wrl(USB_CMD, rdl(USB_CMD) | USB_CMD_RESET); |
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while (rdl(USB_CMD) & USB_CMD_RESET); |
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/* |
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* GL# USB-5 Streaming disable REG_USB_MODE[4]=1 |
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* TBD: This need to be done after each reset! |
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* GL# USB-4 Setup USB Host mode |
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*/ |
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wrl(USB_MODE, USB_MODE_SDIS | USB_MODE_HOST); |
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} |
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static void |
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ehci_orion_conf_mbus_windows(struct usb_hcd *hcd, |
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const struct mbus_dram_target_info *dram) |
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{ |
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int i; |
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for (i = 0; i < 4; i++) { |
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wrl(USB_WINDOW_CTRL(i), 0); |
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wrl(USB_WINDOW_BASE(i), 0); |
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} |
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for (i = 0; i < dram->num_cs; i++) { |
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const struct mbus_dram_window *cs = dram->cs + i; |
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wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) | |
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(cs->mbus_attr << 8) | |
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(dram->mbus_dram_target_id << 4) | 1); |
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wrl(USB_WINDOW_BASE(i), cs->base); |
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} |
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} |
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static int ehci_orion_drv_reset(struct usb_hcd *hcd) |
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{ |
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struct device *dev = hcd->self.controller; |
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int ret; |
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ret = ehci_setup(hcd); |
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if (ret) |
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return ret; |
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/* |
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* For SoC without hlock, need to program sbuscfg value to guarantee |
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* AHB master's burst would not overrun or underrun FIFO. |
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* |
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* sbuscfg reg has to be set after usb controller reset, otherwise |
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* the value would be override to 0. |
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*/ |
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if (of_device_is_compatible(dev->of_node, "marvell,armada-3700-ehci")) |
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wrl(USB_SBUSCFG, USB_SBUSCFG_DEF_VAL); |
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return ret; |
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} |
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static int __maybe_unused ehci_orion_drv_suspend(struct device *dev) |
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{ |
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struct usb_hcd *hcd = dev_get_drvdata(dev); |
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return ehci_suspend(hcd, device_may_wakeup(dev)); |
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} |
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static int __maybe_unused ehci_orion_drv_resume(struct device *dev) |
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{ |
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struct usb_hcd *hcd = dev_get_drvdata(dev); |
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return ehci_resume(hcd, false); |
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} |
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static SIMPLE_DEV_PM_OPS(ehci_orion_pm_ops, ehci_orion_drv_suspend, |
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ehci_orion_drv_resume); |
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static const struct ehci_driver_overrides orion_overrides __initconst = { |
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.extra_priv_size = sizeof(struct orion_ehci_hcd), |
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.reset = ehci_orion_drv_reset, |
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}; |
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static int ehci_orion_drv_probe(struct platform_device *pdev) |
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{ |
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struct orion_ehci_data *pd = dev_get_platdata(&pdev->dev); |
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const struct mbus_dram_target_info *dram; |
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struct resource *res; |
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struct usb_hcd *hcd; |
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struct ehci_hcd *ehci; |
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void __iomem *regs; |
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int irq, err; |
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enum orion_ehci_phy_ver phy_version; |
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struct orion_ehci_hcd *priv; |
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if (usb_disabled()) |
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return -ENODEV; |
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pr_debug("Initializing Orion-SoC USB Host Controller\n"); |
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irq = platform_get_irq(pdev, 0); |
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if (irq <= 0) { |
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err = -ENODEV; |
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goto err; |
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} |
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/* |
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* Right now device-tree probed devices don't get dma_mask |
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* set. Since shared usb code relies on it, set it here for |
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* now. Once we have dma capability bindings this can go away. |
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*/ |
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err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
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if (err) |
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goto err; |
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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regs = devm_ioremap_resource(&pdev->dev, res); |
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if (IS_ERR(regs)) { |
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err = PTR_ERR(regs); |
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goto err; |
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} |
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hcd = usb_create_hcd(&ehci_orion_hc_driver, |
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&pdev->dev, dev_name(&pdev->dev)); |
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if (!hcd) { |
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err = -ENOMEM; |
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goto err; |
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} |
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hcd->rsrc_start = res->start; |
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hcd->rsrc_len = resource_size(res); |
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hcd->regs = regs; |
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ehci = hcd_to_ehci(hcd); |
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ehci->caps = hcd->regs + 0x100; |
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hcd->has_tt = 1; |
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priv = hcd_to_orion_priv(hcd); |
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/* |
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* Not all platforms can gate the clock, so it is not an error if |
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* the clock does not exists. |
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*/ |
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priv->clk = devm_clk_get(&pdev->dev, NULL); |
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if (!IS_ERR(priv->clk)) |
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clk_prepare_enable(priv->clk); |
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priv->phy = devm_phy_optional_get(&pdev->dev, "usb"); |
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if (IS_ERR(priv->phy)) { |
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err = PTR_ERR(priv->phy); |
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if (err != -ENOSYS) |
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goto err_dis_clk; |
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} |
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/* |
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* (Re-)program MBUS remapping windows if we are asked to. |
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*/ |
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dram = mv_mbus_dram_info(); |
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if (dram) |
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ehci_orion_conf_mbus_windows(hcd, dram); |
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/* |
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* setup Orion USB controller. |
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*/ |
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if (pdev->dev.of_node) |
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phy_version = EHCI_PHY_NA; |
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else |
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phy_version = pd->phy_version; |
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switch (phy_version) { |
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case EHCI_PHY_NA: /* dont change USB phy settings */ |
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break; |
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case EHCI_PHY_ORION: |
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orion_usb_phy_v1_setup(hcd); |
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break; |
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case EHCI_PHY_DD: |
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case EHCI_PHY_KW: |
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default: |
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dev_warn(&pdev->dev, "USB phy version isn't supported.\n"); |
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} |
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err = usb_add_hcd(hcd, irq, IRQF_SHARED); |
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if (err) |
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goto err_dis_clk; |
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device_wakeup_enable(hcd->self.controller); |
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return 0; |
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err_dis_clk: |
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if (!IS_ERR(priv->clk)) |
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clk_disable_unprepare(priv->clk); |
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usb_put_hcd(hcd); |
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err: |
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dev_err(&pdev->dev, "init %s fail, %d\n", |
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dev_name(&pdev->dev), err); |
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return err; |
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} |
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static int ehci_orion_drv_remove(struct platform_device *pdev) |
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{ |
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struct usb_hcd *hcd = platform_get_drvdata(pdev); |
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struct orion_ehci_hcd *priv = hcd_to_orion_priv(hcd); |
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usb_remove_hcd(hcd); |
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if (!IS_ERR(priv->clk)) |
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clk_disable_unprepare(priv->clk); |
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usb_put_hcd(hcd); |
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return 0; |
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} |
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static const struct of_device_id ehci_orion_dt_ids[] = { |
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{ .compatible = "marvell,orion-ehci", }, |
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{ .compatible = "marvell,armada-3700-ehci", }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, ehci_orion_dt_ids); |
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static struct platform_driver ehci_orion_driver = { |
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.probe = ehci_orion_drv_probe, |
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.remove = ehci_orion_drv_remove, |
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.shutdown = usb_hcd_platform_shutdown, |
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.driver = { |
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.name = "orion-ehci", |
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.of_match_table = ehci_orion_dt_ids, |
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.pm = &ehci_orion_pm_ops, |
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}, |
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}; |
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static int __init ehci_orion_init(void) |
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{ |
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if (usb_disabled()) |
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return -ENODEV; |
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pr_info("%s: " DRIVER_DESC "\n", hcd_name); |
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ehci_init_driver(&ehci_orion_hc_driver, &orion_overrides); |
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return platform_driver_register(&ehci_orion_driver); |
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} |
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module_init(ehci_orion_init); |
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static void __exit ehci_orion_cleanup(void) |
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{ |
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platform_driver_unregister(&ehci_orion_driver); |
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} |
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module_exit(ehci_orion_cleanup); |
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MODULE_DESCRIPTION(DRIVER_DESC); |
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MODULE_ALIAS("platform:orion-ehci"); |
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MODULE_AUTHOR("Tzachi Perelstein"); |
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MODULE_LICENSE("GPL v2");
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