1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2010, CompuLab, Ltd.
4 * Author: Mike Rapoport <mike@compulab.co.il>
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
21 #include <pci_tegra.h>
22 #include <power-domain.h>
24 #include <linux/delay.h>
29 #include <linux/ioport.h>
30 #include <linux/list.h>
32 #ifndef CONFIG_TEGRA186
33 #include <asm/arch/clock.h>
34 #include <asm/arch/powergate.h>
35 #include <asm/arch-tegra/xusb-padctl.h>
36 #include <dt-bindings/pinctrl/pinctrl-tegra-xusb.h>
40 * FIXME: TODO: This driver contains a number of ifdef CONFIG_TEGRA186 that
41 * should not be present. These are needed because newer Tegra SoCs support
42 * only the standard clock/reset APIs, whereas older Tegra SoCs support only
43 * a custom Tegra-specific API. ASAP the older Tegra SoCs' code should be
44 * fixed to implement the standard APIs, and all drivers converted to solely
45 * use the new standard APIs, with no ifdefs.
48 #define AFI_AXI_BAR0_SZ 0x00
49 #define AFI_AXI_BAR1_SZ 0x04
50 #define AFI_AXI_BAR2_SZ 0x08
51 #define AFI_AXI_BAR3_SZ 0x0c
52 #define AFI_AXI_BAR4_SZ 0x10
53 #define AFI_AXI_BAR5_SZ 0x14
55 #define AFI_AXI_BAR0_START 0x18
56 #define AFI_AXI_BAR1_START 0x1c
57 #define AFI_AXI_BAR2_START 0x20
58 #define AFI_AXI_BAR3_START 0x24
59 #define AFI_AXI_BAR4_START 0x28
60 #define AFI_AXI_BAR5_START 0x2c
62 #define AFI_FPCI_BAR0 0x30
63 #define AFI_FPCI_BAR1 0x34
64 #define AFI_FPCI_BAR2 0x38
65 #define AFI_FPCI_BAR3 0x3c
66 #define AFI_FPCI_BAR4 0x40
67 #define AFI_FPCI_BAR5 0x44
69 #define AFI_CACHE_BAR0_SZ 0x48
70 #define AFI_CACHE_BAR0_ST 0x4c
71 #define AFI_CACHE_BAR1_SZ 0x50
72 #define AFI_CACHE_BAR1_ST 0x54
74 #define AFI_MSI_BAR_SZ 0x60
75 #define AFI_MSI_FPCI_BAR_ST 0x64
76 #define AFI_MSI_AXI_BAR_ST 0x68
78 #define AFI_CONFIGURATION 0xac
79 #define AFI_CONFIGURATION_EN_FPCI (1 << 0)
81 #define AFI_FPCI_ERROR_MASKS 0xb0
83 #define AFI_INTR_MASK 0xb4
84 #define AFI_INTR_MASK_INT_MASK (1 << 0)
85 #define AFI_INTR_MASK_MSI_MASK (1 << 8)
87 #define AFI_SM_INTR_ENABLE 0xc4
88 #define AFI_SM_INTR_INTA_ASSERT (1 << 0)
89 #define AFI_SM_INTR_INTB_ASSERT (1 << 1)
90 #define AFI_SM_INTR_INTC_ASSERT (1 << 2)
91 #define AFI_SM_INTR_INTD_ASSERT (1 << 3)
92 #define AFI_SM_INTR_INTA_DEASSERT (1 << 4)
93 #define AFI_SM_INTR_INTB_DEASSERT (1 << 5)
94 #define AFI_SM_INTR_INTC_DEASSERT (1 << 6)
95 #define AFI_SM_INTR_INTD_DEASSERT (1 << 7)
97 #define AFI_AFI_INTR_ENABLE 0xc8
98 #define AFI_INTR_EN_INI_SLVERR (1 << 0)
99 #define AFI_INTR_EN_INI_DECERR (1 << 1)
100 #define AFI_INTR_EN_TGT_SLVERR (1 << 2)
101 #define AFI_INTR_EN_TGT_DECERR (1 << 3)
102 #define AFI_INTR_EN_TGT_WRERR (1 << 4)
103 #define AFI_INTR_EN_DFPCI_DECERR (1 << 5)
104 #define AFI_INTR_EN_AXI_DECERR (1 << 6)
105 #define AFI_INTR_EN_FPCI_TIMEOUT (1 << 7)
106 #define AFI_INTR_EN_PRSNT_SENSE (1 << 8)
108 #define AFI_PCIE_CONFIG 0x0f8
109 #define AFI_PCIE_CONFIG_PCIE_DISABLE(x) (1 << ((x) + 1))
110 #define AFI_PCIE_CONFIG_PCIE_DISABLE_ALL 0xe
111 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_MASK (0xf << 20)
112 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_SINGLE (0x0 << 20)
113 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_420 (0x0 << 20)
114 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X2_X1 (0x0 << 20)
115 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_DUAL (0x1 << 20)
116 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_222 (0x1 << 20)
117 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X4_X1 (0x1 << 20)
118 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_411 (0x2 << 20)
119 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_T186_401 (0x0 << 20)
120 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_T186_211 (0x1 << 20)
121 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_T186_111 (0x2 << 20)
123 #define AFI_FUSE 0x104
124 #define AFI_FUSE_PCIE_T0_GEN2_DIS (1 << 2)
126 #define AFI_PEX0_CTRL 0x110
127 #define AFI_PEX1_CTRL 0x118
128 #define AFI_PEX2_CTRL 0x128
129 #define AFI_PEX2_CTRL_T186 0x19c
130 #define AFI_PEX_CTRL_RST (1 << 0)
131 #define AFI_PEX_CTRL_CLKREQ_EN (1 << 1)
132 #define AFI_PEX_CTRL_REFCLK_EN (1 << 3)
133 #define AFI_PEX_CTRL_OVERRIDE_EN (1 << 4)
135 #define AFI_PLLE_CONTROL 0x160
136 #define AFI_PLLE_CONTROL_BYPASS_PADS2PLLE_CONTROL (1 << 9)
137 #define AFI_PLLE_CONTROL_PADS2PLLE_CONTROL_EN (1 << 1)
139 #define AFI_PEXBIAS_CTRL_0 0x168
141 #define PADS_CTL_SEL 0x0000009C
143 #define PADS_CTL 0x000000A0
144 #define PADS_CTL_IDDQ_1L (1 << 0)
145 #define PADS_CTL_TX_DATA_EN_1L (1 << 6)
146 #define PADS_CTL_RX_DATA_EN_1L (1 << 10)
148 #define PADS_PLL_CTL_TEGRA20 0x000000B8
149 #define PADS_PLL_CTL_TEGRA30 0x000000B4
150 #define PADS_PLL_CTL_RST_B4SM (0x1 << 1)
151 #define PADS_PLL_CTL_LOCKDET (0x1 << 8)
152 #define PADS_PLL_CTL_REFCLK_MASK (0x3 << 16)
153 #define PADS_PLL_CTL_REFCLK_INTERNAL_CML (0x0 << 16)
154 #define PADS_PLL_CTL_REFCLK_INTERNAL_CMOS (0x1 << 16)
155 #define PADS_PLL_CTL_REFCLK_EXTERNAL (0x2 << 16)
156 #define PADS_PLL_CTL_TXCLKREF_MASK (0x1 << 20)
157 #define PADS_PLL_CTL_TXCLKREF_DIV10 (0x0 << 20)
158 #define PADS_PLL_CTL_TXCLKREF_DIV5 (0x1 << 20)
159 #define PADS_PLL_CTL_TXCLKREF_BUF_EN (0x1 << 22)
161 #define PADS_REFCLK_CFG0 0x000000C8
162 #define PADS_REFCLK_CFG1 0x000000CC
165 * Fields in PADS_REFCLK_CFG*. Those registers form an array of 16-bit
166 * entries, one entry per PCIe port. These field definitions and desired
167 * values aren't in the TRM, but do come from NVIDIA.
169 #define PADS_REFCLK_CFG_TERM_SHIFT 2 /* 6:2 */
170 #define PADS_REFCLK_CFG_E_TERM_SHIFT 7
171 #define PADS_REFCLK_CFG_PREDI_SHIFT 8 /* 11:8 */
172 #define PADS_REFCLK_CFG_DRVI_SHIFT 12 /* 15:12 */
174 #define RP_VEND_XP 0x00000F00
175 #define RP_VEND_XP_DL_UP (1 << 30)
177 #define RP_VEND_CTL2 0x00000FA8
178 #define RP_VEND_CTL2_PCA_ENABLE (1 << 7)
180 #define RP_PRIV_MISC 0x00000FE0
181 #define RP_PRIV_MISC_PRSNT_MAP_EP_PRSNT (0xE << 0)
182 #define RP_PRIV_MISC_PRSNT_MAP_EP_ABSNT (0xF << 0)
184 #define RP_LINK_CONTROL_STATUS 0x00000090
185 #define RP_LINK_CONTROL_STATUS_DL_LINK_ACTIVE 0x20000000
186 #define RP_LINK_CONTROL_STATUS_LINKSTAT_MASK 0x3fff0000
196 struct tegra_pcie_port {
197 struct tegra_pcie *pcie;
199 struct fdt_resource regs;
200 unsigned int num_lanes;
203 struct list_head list;
206 struct tegra_pcie_soc {
207 unsigned int num_ports;
208 unsigned long pads_pll_ctl;
209 unsigned long tx_ref_sel;
210 unsigned long afi_pex2_ctrl;
211 u32 pads_refclk_cfg0;
212 u32 pads_refclk_cfg1;
213 bool has_pex_clkreq_en;
214 bool has_pex_bias_ctrl;
217 bool force_pca_enable;
221 struct resource pads;
225 struct list_head ports;
228 const struct tegra_pcie_soc *soc;
230 #ifdef CONFIG_TEGRA186
233 struct reset_ctl reset_afi;
234 struct reset_ctl reset_pex;
235 struct reset_ctl reset_pcie_x;
236 struct power_domain pwrdom;
238 struct tegra_xusb_phy *phy;
242 static void afi_writel(struct tegra_pcie *pcie, unsigned long value,
243 unsigned long offset)
245 writel(value, pcie->afi.start + offset);
248 static unsigned long afi_readl(struct tegra_pcie *pcie, unsigned long offset)
250 return readl(pcie->afi.start + offset);
253 static void pads_writel(struct tegra_pcie *pcie, unsigned long value,
254 unsigned long offset)
256 writel(value, pcie->pads.start + offset);
259 #ifndef CONFIG_TEGRA186
260 static unsigned long pads_readl(struct tegra_pcie *pcie, unsigned long offset)
262 return readl(pcie->pads.start + offset);
266 static unsigned long rp_readl(struct tegra_pcie_port *port,
267 unsigned long offset)
269 return readl(port->regs.start + offset);
272 static void rp_writel(struct tegra_pcie_port *port, unsigned long value,
273 unsigned long offset)
275 writel(value, port->regs.start + offset);
278 static unsigned long tegra_pcie_conf_offset(pci_dev_t bdf, int where)
280 return ((where & 0xf00) << 16) | (PCI_BUS(bdf) << 16) |
281 (PCI_DEV(bdf) << 11) | (PCI_FUNC(bdf) << 8) |
285 static int tegra_pcie_conf_address(struct tegra_pcie *pcie, pci_dev_t bdf,
286 int where, unsigned long *address)
288 unsigned int bus = PCI_BUS(bdf);
291 unsigned int dev = PCI_DEV(bdf);
292 struct tegra_pcie_port *port;
294 list_for_each_entry(port, &pcie->ports, list) {
295 if (port->index + 1 == dev) {
296 *address = port->regs.start + (where & ~3);
302 #ifdef CONFIG_TEGRA20
303 unsigned int dev = PCI_DEV(bdf);
308 *address = pcie->cs.start + tegra_pcie_conf_offset(bdf, where);
313 static int pci_tegra_read_config(const struct udevice *bus, pci_dev_t bdf,
314 uint offset, ulong *valuep,
315 enum pci_size_t size)
317 struct tegra_pcie *pcie = dev_get_priv(bus);
318 unsigned long address, value;
321 err = tegra_pcie_conf_address(pcie, bdf, offset, &address);
327 value = readl(address);
329 #ifdef CONFIG_TEGRA20
330 /* fixup root port class */
331 if (PCI_BUS(bdf) == 0) {
332 if ((offset & ~3) == PCI_CLASS_REVISION) {
333 value &= ~0x00ff0000;
334 value |= PCI_CLASS_BRIDGE_PCI << 16;
340 *valuep = pci_conv_32_to_size(value, offset, size);
345 static int pci_tegra_write_config(struct udevice *bus, pci_dev_t bdf,
346 uint offset, ulong value,
347 enum pci_size_t size)
349 struct tegra_pcie *pcie = dev_get_priv(bus);
350 unsigned long address;
354 err = tegra_pcie_conf_address(pcie, bdf, offset, &address);
358 old = readl(address);
359 value = pci_conv_size_to_32(old, value, offset, size);
360 writel(value, address);
365 static int tegra_pcie_port_parse_dt(ofnode node, struct tegra_pcie_port *port)
370 addr = ofnode_get_property(node, "assigned-addresses", &len);
372 pr_err("property \"assigned-addresses\" not found");
373 return -FDT_ERR_NOTFOUND;
376 port->regs.start = fdt32_to_cpu(addr[2]);
377 port->regs.end = port->regs.start + fdt32_to_cpu(addr[4]);
382 static int tegra_pcie_get_xbar_config(ofnode node, u32 lanes,
383 enum tegra_pci_id id, unsigned long *xbar)
389 debug("single-mode configuration\n");
390 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_SINGLE;
394 debug("dual-mode configuration\n");
395 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_DUAL;
402 debug("4x1, 2x1 configuration\n");
403 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_420;
407 debug("2x3 configuration\n");
408 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_222;
412 debug("4x1, 1x2 configuration\n");
413 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_411;
421 debug("4x1, 1x1 configuration\n");
422 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X4_X1;
426 debug("2x1, 1x1 configuration\n");
427 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X2_X1;
434 debug("x4 x1 configuration\n");
435 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_T186_401;
439 debug("x2 x1 x1 configuration\n");
440 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_T186_211;
444 debug("x1 x1 x1 configuration\n");
445 *xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_T186_111;
453 return -FDT_ERR_NOTFOUND;
456 static int tegra_pcie_parse_port_info(ofnode node, uint *index, uint *lanes)
458 struct fdt_pci_addr addr;
461 err = ofnode_read_u32_default(node, "nvidia,num-lanes", -1);
463 pr_err("failed to parse \"nvidia,num-lanes\" property");
469 err = ofnode_read_pci_addr(node, 0, "reg", &addr);
471 pr_err("failed to parse \"reg\" property");
475 *index = PCI_DEV(addr.phys_hi) - 1;
480 int __weak tegra_pcie_board_init(void)
485 static int tegra_pcie_parse_dt(struct udevice *dev, enum tegra_pci_id id,
486 struct tegra_pcie *pcie)
492 err = dev_read_resource(dev, 0, &pcie->pads);
494 pr_err("resource \"pads\" not found");
498 err = dev_read_resource(dev, 1, &pcie->afi);
500 pr_err("resource \"afi\" not found");
504 err = dev_read_resource(dev, 2, &pcie->cs);
506 pr_err("resource \"cs\" not found");
510 err = tegra_pcie_board_init();
512 pr_err("tegra_pcie_board_init() failed: err=%d", err);
516 #ifndef CONFIG_TEGRA186
517 pcie->phy = tegra_xusb_phy_get(TEGRA_XUSB_PADCTL_PCIE);
519 err = tegra_xusb_phy_prepare(pcie->phy);
521 pr_err("failed to prepare PHY: %d", err);
527 dev_for_each_subnode(subnode, dev) {
528 unsigned int index = 0, num_lanes = 0;
529 struct tegra_pcie_port *port;
531 err = tegra_pcie_parse_port_info(subnode, &index, &num_lanes);
533 pr_err("failed to obtain root port info");
537 lanes |= num_lanes << (index << 3);
539 if (!ofnode_is_available(subnode))
542 port = malloc(sizeof(*port));
546 memset(port, 0, sizeof(*port));
547 port->num_lanes = num_lanes;
550 err = tegra_pcie_port_parse_dt(subnode, port);
556 list_add_tail(&port->list, &pcie->ports);
560 err = tegra_pcie_get_xbar_config(dev_ofnode(dev), lanes, id,
563 pr_err("invalid lane configuration");
570 #ifdef CONFIG_TEGRA186
571 static int tegra_pcie_power_on(struct tegra_pcie *pcie)
575 ret = power_domain_on(&pcie->pwrdom);
577 pr_err("power_domain_on() failed: %d\n", ret);
581 ret = clk_enable(&pcie->clk_afi);
583 pr_err("clk_enable(afi) failed: %d\n", ret);
587 ret = clk_enable(&pcie->clk_pex);
589 pr_err("clk_enable(pex) failed: %d\n", ret);
593 ret = reset_deassert(&pcie->reset_afi);
595 pr_err("reset_deassert(afi) failed: %d\n", ret);
599 ret = reset_deassert(&pcie->reset_pex);
601 pr_err("reset_deassert(pex) failed: %d\n", ret);
608 static int tegra_pcie_power_on(struct tegra_pcie *pcie)
610 const struct tegra_pcie_soc *soc = pcie->soc;
614 /* reset PCIEXCLK logic, AFI controller and PCIe controller */
615 reset_set_enable(PERIPH_ID_PCIEXCLK, 1);
616 reset_set_enable(PERIPH_ID_AFI, 1);
617 reset_set_enable(PERIPH_ID_PCIE, 1);
619 err = tegra_powergate_power_off(TEGRA_POWERGATE_PCIE);
621 pr_err("failed to power off PCIe partition: %d", err);
625 err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_PCIE,
628 pr_err("failed to power up PCIe partition: %d", err);
632 /* take AFI controller out of reset */
633 reset_set_enable(PERIPH_ID_AFI, 0);
635 /* enable AFI clock */
636 clock_enable(PERIPH_ID_AFI);
638 if (soc->has_cml_clk) {
639 /* enable CML clock */
640 value = readl(NV_PA_CLK_RST_BASE + 0x48c);
643 writel(value, NV_PA_CLK_RST_BASE + 0x48c);
646 err = tegra_plle_enable();
648 pr_err("failed to enable PLLE: %d\n", err);
655 static int tegra_pcie_pll_wait(struct tegra_pcie *pcie, unsigned long timeout)
657 const struct tegra_pcie_soc *soc = pcie->soc;
658 unsigned long start = get_timer(0);
661 while (get_timer(start) < timeout) {
662 value = pads_readl(pcie, soc->pads_pll_ctl);
663 if (value & PADS_PLL_CTL_LOCKDET)
670 static int tegra_pcie_phy_enable(struct tegra_pcie *pcie)
672 const struct tegra_pcie_soc *soc = pcie->soc;
676 /* initialize internal PHY, enable up to 16 PCIe lanes */
677 pads_writel(pcie, 0, PADS_CTL_SEL);
679 /* override IDDQ to 1 on all 4 lanes */
680 value = pads_readl(pcie, PADS_CTL);
681 value |= PADS_CTL_IDDQ_1L;
682 pads_writel(pcie, value, PADS_CTL);
685 * Set up PHY PLL inputs select PLLE output as refclock, set TX
686 * ref sel to div10 (not div5).
688 value = pads_readl(pcie, soc->pads_pll_ctl);
689 value &= ~(PADS_PLL_CTL_REFCLK_MASK | PADS_PLL_CTL_TXCLKREF_MASK);
690 value |= PADS_PLL_CTL_REFCLK_INTERNAL_CML | soc->tx_ref_sel;
691 pads_writel(pcie, value, soc->pads_pll_ctl);
694 value = pads_readl(pcie, soc->pads_pll_ctl);
695 value &= ~PADS_PLL_CTL_RST_B4SM;
696 pads_writel(pcie, value, soc->pads_pll_ctl);
700 /* take PLL out of reset */
701 value = pads_readl(pcie, soc->pads_pll_ctl);
702 value |= PADS_PLL_CTL_RST_B4SM;
703 pads_writel(pcie, value, soc->pads_pll_ctl);
705 /* wait for the PLL to lock */
706 err = tegra_pcie_pll_wait(pcie, 500);
708 pr_err("PLL failed to lock: %d", err);
712 /* turn off IDDQ override */
713 value = pads_readl(pcie, PADS_CTL);
714 value &= ~PADS_CTL_IDDQ_1L;
715 pads_writel(pcie, value, PADS_CTL);
717 /* enable TX/RX data */
718 value = pads_readl(pcie, PADS_CTL);
719 value |= PADS_CTL_TX_DATA_EN_1L | PADS_CTL_RX_DATA_EN_1L;
720 pads_writel(pcie, value, PADS_CTL);
726 static int tegra_pcie_enable_controller(struct tegra_pcie *pcie)
728 const struct tegra_pcie_soc *soc = pcie->soc;
729 struct tegra_pcie_port *port;
733 #ifdef CONFIG_TEGRA186
738 value = afi_readl(pcie, AFI_PLLE_CONTROL);
739 value &= ~AFI_PLLE_CONTROL_BYPASS_PADS2PLLE_CONTROL;
740 value |= AFI_PLLE_CONTROL_PADS2PLLE_CONTROL_EN;
741 afi_writel(pcie, value, AFI_PLLE_CONTROL);
744 if (soc->has_pex_bias_ctrl)
745 afi_writel(pcie, 0, AFI_PEXBIAS_CTRL_0);
747 value = afi_readl(pcie, AFI_PCIE_CONFIG);
748 value &= ~AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_MASK;
749 value |= AFI_PCIE_CONFIG_PCIE_DISABLE_ALL | pcie->xbar;
751 list_for_each_entry(port, &pcie->ports, list)
752 value &= ~AFI_PCIE_CONFIG_PCIE_DISABLE(port->index);
754 afi_writel(pcie, value, AFI_PCIE_CONFIG);
756 value = afi_readl(pcie, AFI_FUSE);
759 value &= ~AFI_FUSE_PCIE_T0_GEN2_DIS;
761 value |= AFI_FUSE_PCIE_T0_GEN2_DIS;
763 afi_writel(pcie, value, AFI_FUSE);
765 #ifndef CONFIG_TEGRA186
767 err = tegra_xusb_phy_enable(pcie->phy);
769 err = tegra_pcie_phy_enable(pcie);
772 pr_err("failed to power on PHY: %d\n", err);
777 /* take the PCIEXCLK logic out of reset */
778 #ifdef CONFIG_TEGRA186
779 err = reset_deassert(&pcie->reset_pcie_x);
781 pr_err("reset_deassert(pcie_x) failed: %d\n", err);
785 reset_set_enable(PERIPH_ID_PCIEXCLK, 0);
788 /* finally enable PCIe */
789 value = afi_readl(pcie, AFI_CONFIGURATION);
790 value |= AFI_CONFIGURATION_EN_FPCI;
791 afi_writel(pcie, value, AFI_CONFIGURATION);
793 /* disable all interrupts */
794 afi_writel(pcie, 0, AFI_AFI_INTR_ENABLE);
795 afi_writel(pcie, 0, AFI_SM_INTR_ENABLE);
796 afi_writel(pcie, 0, AFI_INTR_MASK);
797 afi_writel(pcie, 0, AFI_FPCI_ERROR_MASKS);
802 static int tegra_pcie_setup_translations(struct udevice *bus)
804 struct tegra_pcie *pcie = dev_get_priv(bus);
805 unsigned long fpci, axi, size;
806 struct pci_region *io, *mem, *pref;
809 /* BAR 0: type 1 extended configuration space */
811 size = resource_size(&pcie->cs);
812 axi = pcie->cs.start;
814 afi_writel(pcie, axi, AFI_AXI_BAR0_START);
815 afi_writel(pcie, size >> 12, AFI_AXI_BAR0_SZ);
816 afi_writel(pcie, fpci, AFI_FPCI_BAR0);
818 count = pci_get_regions(bus, &io, &mem, &pref);
822 /* BAR 1: downstream I/O */
825 axi = io->phys_start;
827 afi_writel(pcie, axi, AFI_AXI_BAR1_START);
828 afi_writel(pcie, size >> 12, AFI_AXI_BAR1_SZ);
829 afi_writel(pcie, fpci, AFI_FPCI_BAR1);
831 /* BAR 2: prefetchable memory */
832 fpci = (((pref->phys_start >> 12) & 0x0fffffff) << 4) | 0x1;
834 axi = pref->phys_start;
836 afi_writel(pcie, axi, AFI_AXI_BAR2_START);
837 afi_writel(pcie, size >> 12, AFI_AXI_BAR2_SZ);
838 afi_writel(pcie, fpci, AFI_FPCI_BAR2);
840 /* BAR 3: non-prefetchable memory */
841 fpci = (((mem->phys_start >> 12) & 0x0fffffff) << 4) | 0x1;
843 axi = mem->phys_start;
845 afi_writel(pcie, axi, AFI_AXI_BAR3_START);
846 afi_writel(pcie, size >> 12, AFI_AXI_BAR3_SZ);
847 afi_writel(pcie, fpci, AFI_FPCI_BAR3);
849 /* NULL out the remaining BARs as they are not used */
850 afi_writel(pcie, 0, AFI_AXI_BAR4_START);
851 afi_writel(pcie, 0, AFI_AXI_BAR4_SZ);
852 afi_writel(pcie, 0, AFI_FPCI_BAR4);
854 afi_writel(pcie, 0, AFI_AXI_BAR5_START);
855 afi_writel(pcie, 0, AFI_AXI_BAR5_SZ);
856 afi_writel(pcie, 0, AFI_FPCI_BAR5);
858 /* map all upstream transactions as uncached */
859 afi_writel(pcie, NV_PA_SDRAM_BASE, AFI_CACHE_BAR0_ST);
860 afi_writel(pcie, 0, AFI_CACHE_BAR0_SZ);
861 afi_writel(pcie, 0, AFI_CACHE_BAR1_ST);
862 afi_writel(pcie, 0, AFI_CACHE_BAR1_SZ);
864 /* MSI translations are setup only when needed */
865 afi_writel(pcie, 0, AFI_MSI_FPCI_BAR_ST);
866 afi_writel(pcie, 0, AFI_MSI_BAR_SZ);
867 afi_writel(pcie, 0, AFI_MSI_AXI_BAR_ST);
868 afi_writel(pcie, 0, AFI_MSI_BAR_SZ);
873 static unsigned long tegra_pcie_port_get_pex_ctrl(struct tegra_pcie_port *port)
875 unsigned long ret = 0;
877 switch (port->index) {
887 ret = port->pcie->soc->afi_pex2_ctrl;
894 void tegra_pcie_port_reset(struct tegra_pcie_port *port)
896 unsigned long ctrl = tegra_pcie_port_get_pex_ctrl(port);
899 /* pulse reset signel */
900 value = afi_readl(port->pcie, ctrl);
901 value &= ~AFI_PEX_CTRL_RST;
902 afi_writel(port->pcie, value, ctrl);
906 value = afi_readl(port->pcie, ctrl);
907 value |= AFI_PEX_CTRL_RST;
908 afi_writel(port->pcie, value, ctrl);
911 int tegra_pcie_port_index_of_port(struct tegra_pcie_port *port)
916 void __weak tegra_pcie_board_port_reset(struct tegra_pcie_port *port)
918 tegra_pcie_port_reset(port);
921 static void tegra_pcie_port_enable(struct tegra_pcie_port *port)
923 struct tegra_pcie *pcie = port->pcie;
924 const struct tegra_pcie_soc *soc = pcie->soc;
925 unsigned long ctrl = tegra_pcie_port_get_pex_ctrl(port);
928 /* enable reference clock */
929 value = afi_readl(pcie, ctrl);
930 value |= AFI_PEX_CTRL_REFCLK_EN;
932 if (pcie->soc->has_pex_clkreq_en)
933 value |= AFI_PEX_CTRL_CLKREQ_EN;
935 value |= AFI_PEX_CTRL_OVERRIDE_EN;
937 afi_writel(pcie, value, ctrl);
939 tegra_pcie_board_port_reset(port);
941 if (soc->force_pca_enable) {
942 value = rp_readl(port, RP_VEND_CTL2);
943 value |= RP_VEND_CTL2_PCA_ENABLE;
944 rp_writel(port, value, RP_VEND_CTL2);
947 /* configure the reference clock driver */
948 pads_writel(pcie, soc->pads_refclk_cfg0, PADS_REFCLK_CFG0);
949 if (soc->num_ports > 2)
950 pads_writel(pcie, soc->pads_refclk_cfg1, PADS_REFCLK_CFG1);
953 static bool tegra_pcie_port_check_link(struct tegra_pcie_port *port)
955 unsigned int retries = 3;
958 value = rp_readl(port, RP_PRIV_MISC);
959 value &= ~RP_PRIV_MISC_PRSNT_MAP_EP_ABSNT;
960 value |= RP_PRIV_MISC_PRSNT_MAP_EP_PRSNT;
961 rp_writel(port, value, RP_PRIV_MISC);
964 unsigned int timeout = 200;
967 value = rp_readl(port, RP_VEND_XP);
968 if (value & RP_VEND_XP_DL_UP)
975 debug("link %u down, retrying\n", port->index);
982 value = rp_readl(port, RP_LINK_CONTROL_STATUS);
983 if (value & RP_LINK_CONTROL_STATUS_DL_LINK_ACTIVE)
990 tegra_pcie_board_port_reset(port);
996 static void tegra_pcie_port_disable(struct tegra_pcie_port *port)
998 unsigned long ctrl = tegra_pcie_port_get_pex_ctrl(port);
1001 /* assert port reset */
1002 value = afi_readl(port->pcie, ctrl);
1003 value &= ~AFI_PEX_CTRL_RST;
1004 afi_writel(port->pcie, value, ctrl);
1006 /* disable reference clock */
1007 value = afi_readl(port->pcie, ctrl);
1008 value &= ~AFI_PEX_CTRL_REFCLK_EN;
1009 afi_writel(port->pcie, value, ctrl);
1012 static void tegra_pcie_port_free(struct tegra_pcie_port *port)
1014 list_del(&port->list);
1018 static int tegra_pcie_enable(struct tegra_pcie *pcie)
1020 struct tegra_pcie_port *port, *tmp;
1022 list_for_each_entry_safe(port, tmp, &pcie->ports, list) {
1023 debug("probing port %u, using %u lanes\n", port->index,
1026 tegra_pcie_port_enable(port);
1028 if (tegra_pcie_port_check_link(port))
1031 debug("link %u down, ignoring\n", port->index);
1033 tegra_pcie_port_disable(port);
1034 tegra_pcie_port_free(port);
1040 static const struct tegra_pcie_soc pci_tegra_soc[] = {
1043 .pads_pll_ctl = PADS_PLL_CTL_TEGRA20,
1044 .tx_ref_sel = PADS_PLL_CTL_TXCLKREF_DIV10,
1045 .pads_refclk_cfg0 = 0xfa5cfa5c,
1046 .has_pex_clkreq_en = false,
1047 .has_pex_bias_ctrl = false,
1048 .has_cml_clk = false,
1053 .pads_pll_ctl = PADS_PLL_CTL_TEGRA30,
1054 .tx_ref_sel = PADS_PLL_CTL_TXCLKREF_BUF_EN,
1055 .afi_pex2_ctrl = AFI_PEX2_CTRL,
1056 .pads_refclk_cfg0 = 0xfa5cfa5c,
1057 .pads_refclk_cfg1 = 0xfa5cfa5c,
1058 .has_pex_clkreq_en = true,
1059 .has_pex_bias_ctrl = true,
1060 .has_cml_clk = true,
1065 .pads_pll_ctl = PADS_PLL_CTL_TEGRA30,
1066 .tx_ref_sel = PADS_PLL_CTL_TXCLKREF_BUF_EN,
1067 .pads_refclk_cfg0 = 0x44ac44ac,
1068 .has_pex_clkreq_en = true,
1069 .has_pex_bias_ctrl = true,
1070 .has_cml_clk = true,
1075 .pads_pll_ctl = PADS_PLL_CTL_TEGRA30,
1076 .tx_ref_sel = PADS_PLL_CTL_TXCLKREF_BUF_EN,
1077 .pads_refclk_cfg0 = 0x90b890b8,
1078 .has_pex_clkreq_en = true,
1079 .has_pex_bias_ctrl = true,
1080 .has_cml_clk = true,
1082 .force_pca_enable = true,
1086 .afi_pex2_ctrl = AFI_PEX2_CTRL_T186,
1087 .pads_refclk_cfg0 = 0x80b880b8,
1088 .pads_refclk_cfg1 = 0x000480b8,
1089 .has_pex_clkreq_en = true,
1090 .has_pex_bias_ctrl = true,
1095 static int pci_tegra_of_to_plat(struct udevice *dev)
1097 struct tegra_pcie *pcie = dev_get_priv(dev);
1098 enum tegra_pci_id id;
1100 id = dev_get_driver_data(dev);
1101 pcie->soc = &pci_tegra_soc[id];
1103 INIT_LIST_HEAD(&pcie->ports);
1105 if (tegra_pcie_parse_dt(dev, id, pcie))
1111 static int pci_tegra_probe(struct udevice *dev)
1113 struct tegra_pcie *pcie = dev_get_priv(dev);
1116 #ifdef CONFIG_TEGRA186
1117 err = clk_get_by_name(dev, "afi", &pcie->clk_afi);
1119 debug("clk_get_by_name(afi) failed: %d\n", err);
1123 err = clk_get_by_name(dev, "pex", &pcie->clk_pex);
1125 debug("clk_get_by_name(pex) failed: %d\n", err);
1129 err = reset_get_by_name(dev, "afi", &pcie->reset_afi);
1131 debug("reset_get_by_name(afi) failed: %d\n", err);
1135 err = reset_get_by_name(dev, "pex", &pcie->reset_pex);
1137 debug("reset_get_by_name(pex) failed: %d\n", err);
1141 err = reset_get_by_name(dev, "pcie_x", &pcie->reset_pcie_x);
1143 debug("reset_get_by_name(pcie_x) failed: %d\n", err);
1147 err = power_domain_get(dev, &pcie->pwrdom);
1149 debug("power_domain_get() failed: %d\n", err);
1154 err = tegra_pcie_power_on(pcie);
1156 pr_err("failed to power on");
1160 err = tegra_pcie_enable_controller(pcie);
1162 pr_err("failed to enable controller");
1166 err = tegra_pcie_setup_translations(dev);
1168 pr_err("failed to decode ranges");
1172 err = tegra_pcie_enable(pcie);
1174 pr_err("failed to enable PCIe");
1181 static const struct dm_pci_ops pci_tegra_ops = {
1182 .read_config = pci_tegra_read_config,
1183 .write_config = pci_tegra_write_config,
1186 static const struct udevice_id pci_tegra_ids[] = {
1187 { .compatible = "nvidia,tegra20-pcie", .data = TEGRA20_PCIE },
1188 { .compatible = "nvidia,tegra30-pcie", .data = TEGRA30_PCIE },
1189 { .compatible = "nvidia,tegra124-pcie", .data = TEGRA124_PCIE },
1190 { .compatible = "nvidia,tegra210-pcie", .data = TEGRA210_PCIE },
1191 { .compatible = "nvidia,tegra186-pcie", .data = TEGRA186_PCIE },
1195 U_BOOT_DRIVER(pci_tegra) = {
1196 .name = "pci_tegra",
1198 .of_match = pci_tegra_ids,
1199 .ops = &pci_tegra_ops,
1200 .of_to_plat = pci_tegra_of_to_plat,
1201 .probe = pci_tegra_probe,
1202 .priv_auto = sizeof(struct tegra_pcie),