1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2010, CompuLab, Ltd.
6 * Based on NVIDIA PCIe driver
7 * Copyright (c) 2008-2009, NVIDIA Corporation.
9 * Copyright (c) 2013-2014, NVIDIA Corporation.
12 #define pr_fmt(fmt) "tegra-pcie: " fmt
20 #include <power-domain.h>
26 #include <linux/ioport.h>
27 #include <linux/list.h>
29 #ifndef CONFIG_TEGRA186
30 #include <asm/arch/clock.h>
31 #include <asm/arch/powergate.h>
32 #include <asm/arch-tegra/xusb-padctl.h>
33 #include <dt-bindings/pinctrl/pinctrl-tegra-xusb.h>
37 * FIXME: TODO: This driver contains a number of ifdef CONFIG_TEGRA186 that
38 * should not be present. These are needed because newer Tegra SoCs support
39 * only the standard clock/reset APIs, whereas older Tegra SoCs support only
40 * a custom Tegra-specific API. ASAP the older Tegra SoCs' code should be
41 * fixed to implement the standard APIs, and all drivers converted to solely
42 * use the new standard APIs, with no ifdefs.
45 #define AFI_AXI_BAR0_SZ 0x00
46 #define AFI_AXI_BAR1_SZ 0x04
47 #define AFI_AXI_BAR2_SZ 0x08
48 #define AFI_AXI_BAR3_SZ 0x0c
49 #define AFI_AXI_BAR4_SZ 0x10
50 #define AFI_AXI_BAR5_SZ 0x14
52 #define AFI_AXI_BAR0_START 0x18
53 #define AFI_AXI_BAR1_START 0x1c
54 #define AFI_AXI_BAR2_START 0x20
55 #define AFI_AXI_BAR3_START 0x24
56 #define AFI_AXI_BAR4_START 0x28
57 #define AFI_AXI_BAR5_START 0x2c
59 #define AFI_FPCI_BAR0 0x30
60 #define AFI_FPCI_BAR1 0x34
61 #define AFI_FPCI_BAR2 0x38
62 #define AFI_FPCI_BAR3 0x3c
63 #define AFI_FPCI_BAR4 0x40
64 #define AFI_FPCI_BAR5 0x44
66 #define AFI_CACHE_BAR0_SZ 0x48
67 #define AFI_CACHE_BAR0_ST 0x4c
68 #define AFI_CACHE_BAR1_SZ 0x50
69 #define AFI_CACHE_BAR1_ST 0x54
71 #define AFI_MSI_BAR_SZ 0x60
72 #define AFI_MSI_FPCI_BAR_ST 0x64
73 #define AFI_MSI_AXI_BAR_ST 0x68
75 #define AFI_CONFIGURATION 0xac
76 #define AFI_CONFIGURATION_EN_FPCI (1 << 0)
78 #define AFI_FPCI_ERROR_MASKS 0xb0
80 #define AFI_INTR_MASK 0xb4
81 #define AFI_INTR_MASK_INT_MASK (1 << 0)
82 #define AFI_INTR_MASK_MSI_MASK (1 << 8)
84 #define AFI_SM_INTR_ENABLE 0xc4
85 #define AFI_SM_INTR_INTA_ASSERT (1 << 0)
86 #define AFI_SM_INTR_INTB_ASSERT (1 << 1)
87 #define AFI_SM_INTR_INTC_ASSERT (1 << 2)
88 #define AFI_SM_INTR_INTD_ASSERT (1 << 3)
89 #define AFI_SM_INTR_INTA_DEASSERT (1 << 4)
90 #define AFI_SM_INTR_INTB_DEASSERT (1 << 5)
91 #define AFI_SM_INTR_INTC_DEASSERT (1 << 6)
92 #define AFI_SM_INTR_INTD_DEASSERT (1 << 7)
94 #define AFI_AFI_INTR_ENABLE 0xc8
95 #define AFI_INTR_EN_INI_SLVERR (1 << 0)
96 #define AFI_INTR_EN_INI_DECERR (1 << 1)
97 #define AFI_INTR_EN_TGT_SLVERR (1 << 2)
98 #define AFI_INTR_EN_TGT_DECERR (1 << 3)
99 #define AFI_INTR_EN_TGT_WRERR (1 << 4)
100 #define AFI_INTR_EN_DFPCI_DECERR (1 << 5)
101 #define AFI_INTR_EN_AXI_DECERR (1 << 6)
102 #define AFI_INTR_EN_FPCI_TIMEOUT (1 << 7)
103 #define AFI_INTR_EN_PRSNT_SENSE (1 << 8)
105 #define AFI_PCIE_CONFIG 0x0f8
106 #define AFI_PCIE_CONFIG_PCIE_DISABLE(x) (1 << ((x) + 1))
107 #define AFI_PCIE_CONFIG_PCIE_DISABLE_ALL 0xe
108 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_MASK (0xf << 20)
109 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_SINGLE (0x0 << 20)
110 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_420 (0x0 << 20)
111 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X2_X1 (0x0 << 20)
112 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_DUAL (0x1 << 20)
113 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_222 (0x1 << 20)
114 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X4_X1 (0x1 << 20)
115 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_411 (0x2 << 20)
116 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_T186_401 (0x0 << 20)
117 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_T186_211 (0x1 << 20)
118 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_T186_111 (0x2 << 20)
120 #define AFI_FUSE 0x104
121 #define AFI_FUSE_PCIE_T0_GEN2_DIS (1 << 2)
123 #define AFI_PEX0_CTRL 0x110
124 #define AFI_PEX1_CTRL 0x118
125 #define AFI_PEX2_CTRL 0x128
126 #define AFI_PEX2_CTRL_T186 0x19c
127 #define AFI_PEX_CTRL_RST (1 << 0)
128 #define AFI_PEX_CTRL_CLKREQ_EN (1 << 1)
129 #define AFI_PEX_CTRL_REFCLK_EN (1 << 3)
130 #define AFI_PEX_CTRL_OVERRIDE_EN (1 << 4)
132 #define AFI_PLLE_CONTROL 0x160
133 #define AFI_PLLE_CONTROL_BYPASS_PADS2PLLE_CONTROL (1 << 9)
134 #define AFI_PLLE_CONTROL_PADS2PLLE_CONTROL_EN (1 << 1)
136 #define AFI_PEXBIAS_CTRL_0 0x168
138 #define PADS_CTL_SEL 0x0000009C
140 #define PADS_CTL 0x000000A0
141 #define PADS_CTL_IDDQ_1L (1 << 0)
142 #define PADS_CTL_TX_DATA_EN_1L (1 << 6)
143 #define PADS_CTL_RX_DATA_EN_1L (1 << 10)
145 #define PADS_PLL_CTL_TEGRA20 0x000000B8
146 #define PADS_PLL_CTL_TEGRA30 0x000000B4
147 #define PADS_PLL_CTL_RST_B4SM (0x1 << 1)
148 #define PADS_PLL_CTL_LOCKDET (0x1 << 8)
149 #define PADS_PLL_CTL_REFCLK_MASK (0x3 << 16)
150 #define PADS_PLL_CTL_REFCLK_INTERNAL_CML (0x0 << 16)
151 #define PADS_PLL_CTL_REFCLK_INTERNAL_CMOS (0x1 << 16)
152 #define PADS_PLL_CTL_REFCLK_EXTERNAL (0x2 << 16)
153 #define PADS_PLL_CTL_TXCLKREF_MASK (0x1 << 20)
154 #define PADS_PLL_CTL_TXCLKREF_DIV10 (0x0 << 20)
155 #define PADS_PLL_CTL_TXCLKREF_DIV5 (0x1 << 20)
156 #define PADS_PLL_CTL_TXCLKREF_BUF_EN (0x1 << 22)
158 #define PADS_REFCLK_CFG0 0x000000C8
159 #define PADS_REFCLK_CFG1 0x000000CC
162 * Fields in PADS_REFCLK_CFG*. Those registers form an array of 16-bit
163 * entries, one entry per PCIe port. These field definitions and desired
164 * values aren't in the TRM, but do come from NVIDIA.
166 #define PADS_REFCLK_CFG_TERM_SHIFT 2 /* 6:2 */
167 #define PADS_REFCLK_CFG_E_TERM_SHIFT 7
168 #define PADS_REFCLK_CFG_PREDI_SHIFT 8 /* 11:8 */
169 #define PADS_REFCLK_CFG_DRVI_SHIFT 12 /* 15:12 */
171 #define RP_VEND_XP 0x00000F00
172 #define RP_VEND_XP_DL_UP (1 << 30)
174 #define RP_VEND_CTL2 0x00000FA8
175 #define RP_VEND_CTL2_PCA_ENABLE (1 << 7)
177 #define RP_PRIV_MISC 0x00000FE0
178 #define RP_PRIV_MISC_PRSNT_MAP_EP_PRSNT (0xE << 0)
179 #define RP_PRIV_MISC_PRSNT_MAP_EP_ABSNT (0xF << 0)
181 #define RP_LINK_CONTROL_STATUS 0x00000090
182 #define RP_LINK_CONTROL_STATUS_DL_LINK_ACTIVE 0x20000000
183 #define RP_LINK_CONTROL_STATUS_LINKSTAT_MASK 0x3fff0000
193 struct tegra_pcie_port {
194 struct tegra_pcie *pcie;
196 struct fdt_resource regs;
197 unsigned int num_lanes;
200 struct list_head list;
203 struct tegra_pcie_soc {
204 unsigned int num_ports;
205 unsigned long pads_pll_ctl;
206 unsigned long tx_ref_sel;
207 unsigned long afi_pex2_ctrl;
208 u32 pads_refclk_cfg0;
209 u32 pads_refclk_cfg1;
210 bool has_pex_clkreq_en;
211 bool has_pex_bias_ctrl;
214 bool force_pca_enable;
218 struct resource pads;
222 struct list_head ports;
225 const struct tegra_pcie_soc *soc;
227 #ifdef CONFIG_TEGRA186
230 struct reset_ctl reset_afi;
231 struct reset_ctl reset_pex;
232 struct reset_ctl reset_pcie_x;
233 struct power_domain pwrdom;
235 struct tegra_xusb_phy *phy;
239 static void afi_writel(struct tegra_pcie *pcie, unsigned long value,
240 unsigned long offset)
242 writel(value, pcie->afi.start + offset);
245 static unsigned long afi_readl(struct tegra_pcie *pcie, unsigned long offset)
247 return readl(pcie->afi.start + offset);
250 static void pads_writel(struct tegra_pcie *pcie, unsigned long value,
251 unsigned long offset)
253 writel(value, pcie->pads.start + offset);
256 #ifndef CONFIG_TEGRA186
257 static unsigned long pads_readl(struct tegra_pcie *pcie, unsigned long offset)
259 return readl(pcie->pads.start + offset);
263 static unsigned long rp_readl(struct tegra_pcie_port *port,
264 unsigned long offset)
266 return readl(port->regs.start + offset);
269 static void rp_writel(struct tegra_pcie_port *port, unsigned long value,
270 unsigned long offset)
272 writel(value, port->regs.start + offset);
275 static unsigned long tegra_pcie_conf_offset(pci_dev_t bdf, int where)
277 return ((where & 0xf00) << 16) | (PCI_BUS(bdf) << 16) |
278 (PCI_DEV(bdf) << 11) | (PCI_FUNC(bdf) << 8) |
282 static int tegra_pcie_conf_address(struct tegra_pcie *pcie, pci_dev_t bdf,
283 int where, unsigned long *address)
285 unsigned int bus = PCI_BUS(bdf);
288 unsigned int dev = PCI_DEV(bdf);
289 struct tegra_pcie_port *port;
291 list_for_each_entry(port, &pcie->ports, list) {
292 if (port->index + 1 == dev) {
293 *address = port->regs.start + (where & ~3);
299 #ifdef CONFIG_TEGRA20
300 unsigned int dev = PCI_DEV(bdf);
305 *address = pcie->cs.start + tegra_pcie_conf_offset(bdf, where);
310 static int pci_tegra_read_config(struct udevice *bus, pci_dev_t bdf,
311 uint offset, ulong *valuep,
312 enum pci_size_t size)
314 struct tegra_pcie *pcie = dev_get_priv(bus);
315 unsigned long address, value;
318 err = tegra_pcie_conf_address(pcie, bdf, offset, &address);
324 value = readl(address);
326 #ifdef CONFIG_TEGRA20
327 /* fixup root port class */
328 if (PCI_BUS(bdf) == 0) {
329 if ((offset & ~3) == PCI_CLASS_REVISION) {
330 value &= ~0x00ff0000;
331 value |= PCI_CLASS_BRIDGE_PCI << 16;
337 *valuep = pci_conv_32_to_size(value, offset, size);
342 static int pci_tegra_write_config(struct udevice *bus, pci_dev_t bdf,
343 uint offset, ulong value,
344 enum pci_size_t size)
346 struct tegra_pcie *pcie = dev_get_priv(bus);
347 unsigned long address;
351 err = tegra_pcie_conf_address(pcie, bdf, offset, &address);
355 old = readl(address);
356 value = pci_conv_size_to_32(old, value, offset, size);
357 writel(value, address);
362 static int tegra_pcie_port_parse_dt(ofnode node, struct tegra_pcie_port *port)
367 addr = ofnode_get_property(node, "assigned-addresses", &len);
369 pr_err("property \"assigned-addresses\" not found");
370 return -FDT_ERR_NOTFOUND;
373 port->regs.start = fdt32_to_cpu(addr[2]);
374 port->regs.end = port->regs.start + fdt32_to_cpu(addr[4]);
379 static int tegra_pcie_get_xbar_config(ofnode node, u32 lanes,
380 enum tegra_pci_id id, unsigned long *xbar)
386 debug("single-mode configuration\n");
387 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_SINGLE;
391 debug("dual-mode configuration\n");
392 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_DUAL;
399 debug("4x1, 2x1 configuration\n");
400 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_420;
404 debug("2x3 configuration\n");
405 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_222;
409 debug("4x1, 1x2 configuration\n");
410 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_411;
418 debug("4x1, 1x1 configuration\n");
419 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X4_X1;
423 debug("2x1, 1x1 configuration\n");
424 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X2_X1;
431 debug("x4 x1 configuration\n");
432 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_T186_401;
436 debug("x2 x1 x1 configuration\n");
437 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_T186_211;
441 debug("x1 x1 x1 configuration\n");
442 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_T186_111;
450 return -FDT_ERR_NOTFOUND;
453 static int tegra_pcie_parse_port_info(ofnode node, uint *index, uint *lanes)
455 struct fdt_pci_addr addr;
458 err = ofnode_read_u32_default(node, "nvidia,num-lanes", -1);
460 pr_err("failed to parse \"nvidia,num-lanes\" property");
466 err = ofnode_read_pci_addr(node, 0, "reg", &addr);
468 pr_err("failed to parse \"reg\" property");
472 *index = PCI_DEV(addr.phys_hi) - 1;
477 int __weak tegra_pcie_board_init(void)
482 static int tegra_pcie_parse_dt(struct udevice *dev, enum tegra_pci_id id,
483 struct tegra_pcie *pcie)
489 err = dev_read_resource(dev, 0, &pcie->pads);
491 pr_err("resource \"pads\" not found");
495 err = dev_read_resource(dev, 1, &pcie->afi);
497 pr_err("resource \"afi\" not found");
501 err = dev_read_resource(dev, 2, &pcie->cs);
503 pr_err("resource \"cs\" not found");
507 err = tegra_pcie_board_init();
509 pr_err("tegra_pcie_board_init() failed: err=%d", err);
513 #ifndef CONFIG_TEGRA186
514 pcie->phy = tegra_xusb_phy_get(TEGRA_XUSB_PADCTL_PCIE);
516 err = tegra_xusb_phy_prepare(pcie->phy);
518 pr_err("failed to prepare PHY: %d", err);
524 dev_for_each_subnode(subnode, dev) {
525 unsigned int index = 0, num_lanes = 0;
526 struct tegra_pcie_port *port;
528 err = tegra_pcie_parse_port_info(subnode, &index, &num_lanes);
530 pr_err("failed to obtain root port info");
534 lanes |= num_lanes << (index << 3);
536 if (!ofnode_is_available(subnode))
539 port = malloc(sizeof(*port));
543 memset(port, 0, sizeof(*port));
544 port->num_lanes = num_lanes;
547 err = tegra_pcie_port_parse_dt(subnode, port);
553 list_add_tail(&port->list, &pcie->ports);
557 err = tegra_pcie_get_xbar_config(dev_ofnode(dev), lanes, id,
560 pr_err("invalid lane configuration");
567 #ifdef CONFIG_TEGRA186
568 static int tegra_pcie_power_on(struct tegra_pcie *pcie)
572 ret = power_domain_on(&pcie->pwrdom);
574 pr_err("power_domain_on() failed: %d\n", ret);
578 ret = clk_enable(&pcie->clk_afi);
580 pr_err("clk_enable(afi) failed: %d\n", ret);
584 ret = clk_enable(&pcie->clk_pex);
586 pr_err("clk_enable(pex) failed: %d\n", ret);
590 ret = reset_deassert(&pcie->reset_afi);
592 pr_err("reset_deassert(afi) failed: %d\n", ret);
596 ret = reset_deassert(&pcie->reset_pex);
598 pr_err("reset_deassert(pex) failed: %d\n", ret);
605 static int tegra_pcie_power_on(struct tegra_pcie *pcie)
607 const struct tegra_pcie_soc *soc = pcie->soc;
611 /* reset PCIEXCLK logic, AFI controller and PCIe controller */
612 reset_set_enable(PERIPH_ID_PCIEXCLK, 1);
613 reset_set_enable(PERIPH_ID_AFI, 1);
614 reset_set_enable(PERIPH_ID_PCIE, 1);
616 err = tegra_powergate_power_off(TEGRA_POWERGATE_PCIE);
618 pr_err("failed to power off PCIe partition: %d", err);
622 err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_PCIE,
625 pr_err("failed to power up PCIe partition: %d", err);
629 /* take AFI controller out of reset */
630 reset_set_enable(PERIPH_ID_AFI, 0);
632 /* enable AFI clock */
633 clock_enable(PERIPH_ID_AFI);
635 if (soc->has_cml_clk) {
636 /* enable CML clock */
637 value = readl(NV_PA_CLK_RST_BASE + 0x48c);
640 writel(value, NV_PA_CLK_RST_BASE + 0x48c);
643 err = tegra_plle_enable();
645 pr_err("failed to enable PLLE: %d\n", err);
652 static int tegra_pcie_pll_wait(struct tegra_pcie *pcie, unsigned long timeout)
654 const struct tegra_pcie_soc *soc = pcie->soc;
655 unsigned long start = get_timer(0);
658 while (get_timer(start) < timeout) {
659 value = pads_readl(pcie, soc->pads_pll_ctl);
660 if (value & PADS_PLL_CTL_LOCKDET)
667 static int tegra_pcie_phy_enable(struct tegra_pcie *pcie)
669 const struct tegra_pcie_soc *soc = pcie->soc;
673 /* initialize internal PHY, enable up to 16 PCIe lanes */
674 pads_writel(pcie, 0, PADS_CTL_SEL);
676 /* override IDDQ to 1 on all 4 lanes */
677 value = pads_readl(pcie, PADS_CTL);
678 value |= PADS_CTL_IDDQ_1L;
679 pads_writel(pcie, value, PADS_CTL);
682 * Set up PHY PLL inputs select PLLE output as refclock, set TX
683 * ref sel to div10 (not div5).
685 value = pads_readl(pcie, soc->pads_pll_ctl);
686 value &= ~(PADS_PLL_CTL_REFCLK_MASK | PADS_PLL_CTL_TXCLKREF_MASK);
687 value |= PADS_PLL_CTL_REFCLK_INTERNAL_CML | soc->tx_ref_sel;
688 pads_writel(pcie, value, soc->pads_pll_ctl);
691 value = pads_readl(pcie, soc->pads_pll_ctl);
692 value &= ~PADS_PLL_CTL_RST_B4SM;
693 pads_writel(pcie, value, soc->pads_pll_ctl);
697 /* take PLL out of reset */
698 value = pads_readl(pcie, soc->pads_pll_ctl);
699 value |= PADS_PLL_CTL_RST_B4SM;
700 pads_writel(pcie, value, soc->pads_pll_ctl);
702 /* wait for the PLL to lock */
703 err = tegra_pcie_pll_wait(pcie, 500);
705 pr_err("PLL failed to lock: %d", err);
709 /* turn off IDDQ override */
710 value = pads_readl(pcie, PADS_CTL);
711 value &= ~PADS_CTL_IDDQ_1L;
712 pads_writel(pcie, value, PADS_CTL);
714 /* enable TX/RX data */
715 value = pads_readl(pcie, PADS_CTL);
716 value |= PADS_CTL_TX_DATA_EN_1L | PADS_CTL_RX_DATA_EN_1L;
717 pads_writel(pcie, value, PADS_CTL);
723 static int tegra_pcie_enable_controller(struct tegra_pcie *pcie)
725 const struct tegra_pcie_soc *soc = pcie->soc;
726 struct tegra_pcie_port *port;
730 #ifdef CONFIG_TEGRA186
735 value = afi_readl(pcie, AFI_PLLE_CONTROL);
736 value &= ~AFI_PLLE_CONTROL_BYPASS_PADS2PLLE_CONTROL;
737 value |= AFI_PLLE_CONTROL_PADS2PLLE_CONTROL_EN;
738 afi_writel(pcie, value, AFI_PLLE_CONTROL);
741 if (soc->has_pex_bias_ctrl)
742 afi_writel(pcie, 0, AFI_PEXBIAS_CTRL_0);
744 value = afi_readl(pcie, AFI_PCIE_CONFIG);
745 value &= ~AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_MASK;
746 value |= AFI_PCIE_CONFIG_PCIE_DISABLE_ALL | pcie->xbar;
748 list_for_each_entry(port, &pcie->ports, list)
749 value &= ~AFI_PCIE_CONFIG_PCIE_DISABLE(port->index);
751 afi_writel(pcie, value, AFI_PCIE_CONFIG);
753 value = afi_readl(pcie, AFI_FUSE);
756 value &= ~AFI_FUSE_PCIE_T0_GEN2_DIS;
758 value |= AFI_FUSE_PCIE_T0_GEN2_DIS;
760 afi_writel(pcie, value, AFI_FUSE);
762 #ifndef CONFIG_TEGRA186
764 err = tegra_xusb_phy_enable(pcie->phy);
766 err = tegra_pcie_phy_enable(pcie);
769 pr_err("failed to power on PHY: %d\n", err);
774 /* take the PCIEXCLK logic out of reset */
775 #ifdef CONFIG_TEGRA186
776 err = reset_deassert(&pcie->reset_pcie_x);
778 pr_err("reset_deassert(pcie_x) failed: %d\n", err);
782 reset_set_enable(PERIPH_ID_PCIEXCLK, 0);
785 /* finally enable PCIe */
786 value = afi_readl(pcie, AFI_CONFIGURATION);
787 value |= AFI_CONFIGURATION_EN_FPCI;
788 afi_writel(pcie, value, AFI_CONFIGURATION);
790 /* disable all interrupts */
791 afi_writel(pcie, 0, AFI_AFI_INTR_ENABLE);
792 afi_writel(pcie, 0, AFI_SM_INTR_ENABLE);
793 afi_writel(pcie, 0, AFI_INTR_MASK);
794 afi_writel(pcie, 0, AFI_FPCI_ERROR_MASKS);
799 static int tegra_pcie_setup_translations(struct udevice *bus)
801 struct tegra_pcie *pcie = dev_get_priv(bus);
802 unsigned long fpci, axi, size;
803 struct pci_region *io, *mem, *pref;
806 /* BAR 0: type 1 extended configuration space */
808 size = resource_size(&pcie->cs);
809 axi = pcie->cs.start;
811 afi_writel(pcie, axi, AFI_AXI_BAR0_START);
812 afi_writel(pcie, size >> 12, AFI_AXI_BAR0_SZ);
813 afi_writel(pcie, fpci, AFI_FPCI_BAR0);
815 count = pci_get_regions(bus, &io, &mem, &pref);
819 /* BAR 1: downstream I/O */
822 axi = io->phys_start;
824 afi_writel(pcie, axi, AFI_AXI_BAR1_START);
825 afi_writel(pcie, size >> 12, AFI_AXI_BAR1_SZ);
826 afi_writel(pcie, fpci, AFI_FPCI_BAR1);
828 /* BAR 2: prefetchable memory */
829 fpci = (((pref->phys_start >> 12) & 0x0fffffff) << 4) | 0x1;
831 axi = pref->phys_start;
833 afi_writel(pcie, axi, AFI_AXI_BAR2_START);
834 afi_writel(pcie, size >> 12, AFI_AXI_BAR2_SZ);
835 afi_writel(pcie, fpci, AFI_FPCI_BAR2);
837 /* BAR 3: non-prefetchable memory */
838 fpci = (((mem->phys_start >> 12) & 0x0fffffff) << 4) | 0x1;
840 axi = mem->phys_start;
842 afi_writel(pcie, axi, AFI_AXI_BAR3_START);
843 afi_writel(pcie, size >> 12, AFI_AXI_BAR3_SZ);
844 afi_writel(pcie, fpci, AFI_FPCI_BAR3);
846 /* NULL out the remaining BARs as they are not used */
847 afi_writel(pcie, 0, AFI_AXI_BAR4_START);
848 afi_writel(pcie, 0, AFI_AXI_BAR4_SZ);
849 afi_writel(pcie, 0, AFI_FPCI_BAR4);
851 afi_writel(pcie, 0, AFI_AXI_BAR5_START);
852 afi_writel(pcie, 0, AFI_AXI_BAR5_SZ);
853 afi_writel(pcie, 0, AFI_FPCI_BAR5);
855 /* map all upstream transactions as uncached */
856 afi_writel(pcie, NV_PA_SDRAM_BASE, AFI_CACHE_BAR0_ST);
857 afi_writel(pcie, 0, AFI_CACHE_BAR0_SZ);
858 afi_writel(pcie, 0, AFI_CACHE_BAR1_ST);
859 afi_writel(pcie, 0, AFI_CACHE_BAR1_SZ);
861 /* MSI translations are setup only when needed */
862 afi_writel(pcie, 0, AFI_MSI_FPCI_BAR_ST);
863 afi_writel(pcie, 0, AFI_MSI_BAR_SZ);
864 afi_writel(pcie, 0, AFI_MSI_AXI_BAR_ST);
865 afi_writel(pcie, 0, AFI_MSI_BAR_SZ);
870 static unsigned long tegra_pcie_port_get_pex_ctrl(struct tegra_pcie_port *port)
872 unsigned long ret = 0;
874 switch (port->index) {
884 ret = port->pcie->soc->afi_pex2_ctrl;
891 static void tegra_pcie_port_reset(struct tegra_pcie_port *port)
893 unsigned long ctrl = tegra_pcie_port_get_pex_ctrl(port);
896 /* pulse reset signel */
897 value = afi_readl(port->pcie, ctrl);
898 value &= ~AFI_PEX_CTRL_RST;
899 afi_writel(port->pcie, value, ctrl);
903 value = afi_readl(port->pcie, ctrl);
904 value |= AFI_PEX_CTRL_RST;
905 afi_writel(port->pcie, value, ctrl);
908 static void tegra_pcie_port_enable(struct tegra_pcie_port *port)
910 struct tegra_pcie *pcie = port->pcie;
911 const struct tegra_pcie_soc *soc = pcie->soc;
912 unsigned long ctrl = tegra_pcie_port_get_pex_ctrl(port);
915 /* enable reference clock */
916 value = afi_readl(pcie, ctrl);
917 value |= AFI_PEX_CTRL_REFCLK_EN;
919 if (pcie->soc->has_pex_clkreq_en)
920 value |= AFI_PEX_CTRL_CLKREQ_EN;
922 value |= AFI_PEX_CTRL_OVERRIDE_EN;
924 afi_writel(pcie, value, ctrl);
926 tegra_pcie_port_reset(port);
928 if (soc->force_pca_enable) {
929 value = rp_readl(port, RP_VEND_CTL2);
930 value |= RP_VEND_CTL2_PCA_ENABLE;
931 rp_writel(port, value, RP_VEND_CTL2);
934 /* configure the reference clock driver */
935 pads_writel(pcie, soc->pads_refclk_cfg0, PADS_REFCLK_CFG0);
936 if (soc->num_ports > 2)
937 pads_writel(pcie, soc->pads_refclk_cfg1, PADS_REFCLK_CFG1);
940 static bool tegra_pcie_port_check_link(struct tegra_pcie_port *port)
942 unsigned int retries = 3;
945 value = rp_readl(port, RP_PRIV_MISC);
946 value &= ~RP_PRIV_MISC_PRSNT_MAP_EP_ABSNT;
947 value |= RP_PRIV_MISC_PRSNT_MAP_EP_PRSNT;
948 rp_writel(port, value, RP_PRIV_MISC);
951 unsigned int timeout = 200;
954 value = rp_readl(port, RP_VEND_XP);
955 if (value & RP_VEND_XP_DL_UP)
962 debug("link %u down, retrying\n", port->index);
969 value = rp_readl(port, RP_LINK_CONTROL_STATUS);
970 if (value & RP_LINK_CONTROL_STATUS_DL_LINK_ACTIVE)
977 tegra_pcie_port_reset(port);
983 static void tegra_pcie_port_disable(struct tegra_pcie_port *port)
985 unsigned long ctrl = tegra_pcie_port_get_pex_ctrl(port);
988 /* assert port reset */
989 value = afi_readl(port->pcie, ctrl);
990 value &= ~AFI_PEX_CTRL_RST;
991 afi_writel(port->pcie, value, ctrl);
993 /* disable reference clock */
994 value = afi_readl(port->pcie, ctrl);
995 value &= ~AFI_PEX_CTRL_REFCLK_EN;
996 afi_writel(port->pcie, value, ctrl);
999 static void tegra_pcie_port_free(struct tegra_pcie_port *port)
1001 list_del(&port->list);
1005 static int tegra_pcie_enable(struct tegra_pcie *pcie)
1007 struct tegra_pcie_port *port, *tmp;
1009 list_for_each_entry_safe(port, tmp, &pcie->ports, list) {
1010 debug("probing port %u, using %u lanes\n", port->index,
1013 tegra_pcie_port_enable(port);
1015 if (tegra_pcie_port_check_link(port))
1018 debug("link %u down, ignoring\n", port->index);
1020 tegra_pcie_port_disable(port);
1021 tegra_pcie_port_free(port);
1027 static const struct tegra_pcie_soc pci_tegra_soc[] = {
1030 .pads_pll_ctl = PADS_PLL_CTL_TEGRA20,
1031 .tx_ref_sel = PADS_PLL_CTL_TXCLKREF_DIV10,
1032 .pads_refclk_cfg0 = 0xfa5cfa5c,
1033 .has_pex_clkreq_en = false,
1034 .has_pex_bias_ctrl = false,
1035 .has_cml_clk = false,
1040 .pads_pll_ctl = PADS_PLL_CTL_TEGRA30,
1041 .tx_ref_sel = PADS_PLL_CTL_TXCLKREF_BUF_EN,
1042 .afi_pex2_ctrl = AFI_PEX2_CTRL,
1043 .pads_refclk_cfg0 = 0xfa5cfa5c,
1044 .pads_refclk_cfg1 = 0xfa5cfa5c,
1045 .has_pex_clkreq_en = true,
1046 .has_pex_bias_ctrl = true,
1047 .has_cml_clk = true,
1052 .pads_pll_ctl = PADS_PLL_CTL_TEGRA30,
1053 .tx_ref_sel = PADS_PLL_CTL_TXCLKREF_BUF_EN,
1054 .pads_refclk_cfg0 = 0x44ac44ac,
1055 .has_pex_clkreq_en = true,
1056 .has_pex_bias_ctrl = true,
1057 .has_cml_clk = true,
1062 .pads_pll_ctl = PADS_PLL_CTL_TEGRA30,
1063 .tx_ref_sel = PADS_PLL_CTL_TXCLKREF_BUF_EN,
1064 .pads_refclk_cfg0 = 0x90b890b8,
1065 .has_pex_clkreq_en = true,
1066 .has_pex_bias_ctrl = true,
1067 .has_cml_clk = true,
1069 .force_pca_enable = true,
1073 .afi_pex2_ctrl = AFI_PEX2_CTRL_T186,
1074 .pads_refclk_cfg0 = 0x80b880b8,
1075 .pads_refclk_cfg1 = 0x000480b8,
1076 .has_pex_clkreq_en = true,
1077 .has_pex_bias_ctrl = true,
1082 static int pci_tegra_ofdata_to_platdata(struct udevice *dev)
1084 struct tegra_pcie *pcie = dev_get_priv(dev);
1085 enum tegra_pci_id id;
1087 id = dev_get_driver_data(dev);
1088 pcie->soc = &pci_tegra_soc[id];
1090 INIT_LIST_HEAD(&pcie->ports);
1092 if (tegra_pcie_parse_dt(dev, id, pcie))
1098 static int pci_tegra_probe(struct udevice *dev)
1100 struct tegra_pcie *pcie = dev_get_priv(dev);
1103 #ifdef CONFIG_TEGRA186
1104 err = clk_get_by_name(dev, "afi", &pcie->clk_afi);
1106 debug("clk_get_by_name(afi) failed: %d\n", err);
1110 err = clk_get_by_name(dev, "pex", &pcie->clk_pex);
1112 debug("clk_get_by_name(pex) failed: %d\n", err);
1116 err = reset_get_by_name(dev, "afi", &pcie->reset_afi);
1118 debug("reset_get_by_name(afi) failed: %d\n", err);
1122 err = reset_get_by_name(dev, "pex", &pcie->reset_pex);
1124 debug("reset_get_by_name(pex) failed: %d\n", err);
1128 err = reset_get_by_name(dev, "pcie_x", &pcie->reset_pcie_x);
1130 debug("reset_get_by_name(pcie_x) failed: %d\n", err);
1134 err = power_domain_get(dev, &pcie->pwrdom);
1136 debug("power_domain_get() failed: %d\n", err);
1141 err = tegra_pcie_power_on(pcie);
1143 pr_err("failed to power on");
1147 err = tegra_pcie_enable_controller(pcie);
1149 pr_err("failed to enable controller");
1153 err = tegra_pcie_setup_translations(dev);
1155 pr_err("failed to decode ranges");
1159 err = tegra_pcie_enable(pcie);
1161 pr_err("failed to enable PCIe");
1168 static const struct dm_pci_ops pci_tegra_ops = {
1169 .read_config = pci_tegra_read_config,
1170 .write_config = pci_tegra_write_config,
1173 static const struct udevice_id pci_tegra_ids[] = {
1174 { .compatible = "nvidia,tegra20-pcie", .data = TEGRA20_PCIE },
1175 { .compatible = "nvidia,tegra30-pcie", .data = TEGRA30_PCIE },
1176 { .compatible = "nvidia,tegra124-pcie", .data = TEGRA124_PCIE },
1177 { .compatible = "nvidia,tegra210-pcie", .data = TEGRA210_PCIE },
1178 { .compatible = "nvidia,tegra186-pcie", .data = TEGRA186_PCIE },
1182 U_BOOT_DRIVER(pci_tegra) = {
1183 .name = "pci_tegra",
1185 .of_match = pci_tegra_ids,
1186 .ops = &pci_tegra_ops,
1187 .ofdata_to_platdata = pci_tegra_ofdata_to_platdata,
1188 .probe = pci_tegra_probe,
1189 .priv_auto_alloc_size = sizeof(struct tegra_pcie),