2 * ***************************************************************************
3 * Copyright (C) 2015 Marvell International Ltd.
4 * ***************************************************************************
5 * This program is free software: you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the Free
7 * Software Foundation, either version 2 of the License, or any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 * ***************************************************************************
20 * Ported from Linux driver - driver/pci/host/pci-aardvark.c
22 * Author: Victor Gu <xigu@marvell.com>
23 * Hezi Shahmoon <hezi.shahmoon@marvell.com>
31 #include <asm-generic/gpio.h>
32 #include <dm/device_compat.h>
33 #include <linux/bitops.h>
34 #include <linux/delay.h>
35 #include <linux/ioport.h>
37 /* PCIe core registers */
38 #define PCIE_CORE_CMD_STATUS_REG 0x4
39 #define PCIE_CORE_CMD_IO_ACCESS_EN BIT(0)
40 #define PCIE_CORE_CMD_MEM_ACCESS_EN BIT(1)
41 #define PCIE_CORE_CMD_MEM_IO_REQ_EN BIT(2)
42 #define PCIE_CORE_DEV_CTRL_STATS_REG 0xc8
43 #define PCIE_CORE_DEV_CTRL_STATS_RELAX_ORDER_DISABLE (0 << 4)
44 #define PCIE_CORE_DEV_CTRL_STATS_SNOOP_DISABLE (0 << 11)
45 #define PCIE_CORE_DEV_CTRL_STATS_MAX_PAYLOAD_SIZE 0x2
46 #define PCIE_CORE_DEV_CTRL_STATS_MAX_PAYLOAD_SIZE_SHIFT 5
47 #define PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SIZE 0x2
48 #define PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SIZE_SHIFT 12
49 #define PCIE_CORE_LINK_CTRL_STAT_REG 0xd0
50 #define PCIE_CORE_LINK_TRAINING BIT(5)
51 #define PCIE_CORE_ERR_CAPCTL_REG 0x118
52 #define PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX BIT(5)
53 #define PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX_EN BIT(6)
54 #define PCIE_CORE_ERR_CAPCTL_ECRC_CHECK BIT(7)
55 #define PCIE_CORE_ERR_CAPCTL_ECRC_CHECK_RCV BIT(8)
57 /* PIO registers base address and register offsets */
58 #define PIO_BASE_ADDR 0x4000
59 #define PIO_CTRL (PIO_BASE_ADDR + 0x0)
60 #define PIO_CTRL_TYPE_MASK GENMASK(3, 0)
61 #define PIO_CTRL_ADDR_WIN_DISABLE BIT(24)
62 #define PIO_STAT (PIO_BASE_ADDR + 0x4)
63 #define PIO_COMPLETION_STATUS_SHIFT 7
64 #define PIO_COMPLETION_STATUS_MASK GENMASK(9, 7)
65 #define PIO_COMPLETION_STATUS_OK 0
66 #define PIO_COMPLETION_STATUS_UR 1
67 #define PIO_COMPLETION_STATUS_CRS 2
68 #define PIO_COMPLETION_STATUS_CA 4
69 #define PIO_NON_POSTED_REQ BIT(10)
70 #define PIO_ERR_STATUS BIT(11)
71 #define PIO_ADDR_LS (PIO_BASE_ADDR + 0x8)
72 #define PIO_ADDR_MS (PIO_BASE_ADDR + 0xc)
73 #define PIO_WR_DATA (PIO_BASE_ADDR + 0x10)
74 #define PIO_WR_DATA_STRB (PIO_BASE_ADDR + 0x14)
75 #define PIO_RD_DATA (PIO_BASE_ADDR + 0x18)
76 #define PIO_START (PIO_BASE_ADDR + 0x1c)
77 #define PIO_ISR (PIO_BASE_ADDR + 0x20)
79 /* Aardvark Control registers */
80 #define CONTROL_BASE_ADDR 0x4800
81 #define PCIE_CORE_CTRL0_REG (CONTROL_BASE_ADDR + 0x0)
82 #define PCIE_GEN_SEL_MSK 0x3
83 #define PCIE_GEN_SEL_SHIFT 0x0
89 #define LANE_CNT_MSK 0x18
90 #define LANE_CNT_SHIFT 0x3
91 #define LANE_COUNT_1 (0 << LANE_CNT_SHIFT)
92 #define LANE_COUNT_2 (1 << LANE_CNT_SHIFT)
93 #define LANE_COUNT_4 (2 << LANE_CNT_SHIFT)
94 #define LANE_COUNT_8 (3 << LANE_CNT_SHIFT)
95 #define LINK_TRAINING_EN BIT(6)
96 #define PCIE_CORE_CTRL2_REG (CONTROL_BASE_ADDR + 0x8)
97 #define PCIE_CORE_CTRL2_RESERVED 0x7
98 #define PCIE_CORE_CTRL2_TD_ENABLE BIT(4)
99 #define PCIE_CORE_CTRL2_STRICT_ORDER_ENABLE BIT(5)
100 #define PCIE_CORE_CTRL2_ADDRWIN_MAP_ENABLE BIT(6)
102 /* LMI registers base address and register offsets */
103 #define LMI_BASE_ADDR 0x6000
104 #define CFG_REG (LMI_BASE_ADDR + 0x0)
105 #define LTSSM_SHIFT 24
106 #define LTSSM_MASK 0x3f
107 #define LTSSM_L0 0x10
108 #define VENDOR_ID_REG (LMI_BASE_ADDR + 0x44)
110 /* PCIe core controller registers */
111 #define CTRL_CORE_BASE_ADDR 0x18000
112 #define CTRL_CONFIG_REG (CTRL_CORE_BASE_ADDR + 0x0)
113 #define CTRL_MODE_SHIFT 0x0
114 #define CTRL_MODE_MASK 0x1
115 #define PCIE_CORE_MODE_DIRECT 0x0
116 #define PCIE_CORE_MODE_COMMAND 0x1
118 /* Transaction types */
119 #define PCIE_CONFIG_RD_TYPE0 0x8
120 #define PCIE_CONFIG_RD_TYPE1 0x9
121 #define PCIE_CONFIG_WR_TYPE0 0xa
122 #define PCIE_CONFIG_WR_TYPE1 0xb
124 /* PCI_BDF shifts 8bit, so we need extra 4bit shift */
125 #define PCIE_BDF(dev) (dev << 4)
126 #define PCIE_CONF_BUS(bus) (((bus) & 0xff) << 20)
127 #define PCIE_CONF_DEV(dev) (((dev) & 0x1f) << 15)
128 #define PCIE_CONF_FUNC(fun) (((fun) & 0x7) << 12)
129 #define PCIE_CONF_REG(reg) ((reg) & 0xffc)
130 #define PCIE_CONF_ADDR(bus, devfn, where) \
131 (PCIE_CONF_BUS(bus) | PCIE_CONF_DEV(PCI_SLOT(devfn)) | \
132 PCIE_CONF_FUNC(PCI_FUNC(devfn)) | PCIE_CONF_REG(where))
134 /* PCIe Retries & Timeout definitions */
135 #define PIO_MAX_RETRIES 1500
136 #define PIO_WAIT_TIMEOUT 1000
137 #define LINK_MAX_RETRIES 10
138 #define LINK_WAIT_TIMEOUT 100000
140 #define CFG_RD_UR_VAL 0xFFFFFFFF
141 #define CFG_RD_CRS_VAL 0xFFFF0001
144 * struct pcie_advk - Advk PCIe controller state
146 * @reg_base: The base address of the register space.
147 * @first_busno: This driver supports multiple PCIe controllers.
148 * first_busno stores the bus number of the PCIe root-port
149 * number which may vary depending on the PCIe setup
150 * (PEX switches etc).
151 * @device: The pointer to PCI uclass device.
157 struct gpio_desc reset_gpio;
160 static inline void advk_writel(struct pcie_advk *pcie, uint val, uint reg)
162 writel(val, pcie->base + reg);
165 static inline uint advk_readl(struct pcie_advk *pcie, uint reg)
167 return readl(pcie->base + reg);
171 * pcie_advk_addr_valid() - Check for valid bus address
173 * @bdf: The PCI device to access
174 * @first_busno: Bus number of the PCIe controller root complex
176 * Return: 1 on valid, 0 on invalid
178 static int pcie_advk_addr_valid(pci_dev_t bdf, int first_busno)
181 * In PCIE-E only a single device (0) can exist
182 * on the local bus. Beyound the local bus, there might be
183 * a Switch and everything is possible.
185 if ((PCI_BUS(bdf) == first_busno) && (PCI_DEV(bdf) > 0))
192 * pcie_advk_wait_pio() - Wait for PIO access to be accomplished
194 * @pcie: The PCI device to access
196 * Wait up to 1.5 seconds for PIO access to be accomplished.
198 * Return 1 (true) if PIO access is accomplished.
199 * Return 0 (false) if PIO access is timed out.
201 static int pcie_advk_wait_pio(struct pcie_advk *pcie)
206 for (count = 0; count < PIO_MAX_RETRIES; count++) {
207 start = advk_readl(pcie, PIO_START);
208 isr = advk_readl(pcie, PIO_ISR);
212 * Do not check the PIO state too frequently,
213 * 100us delay is appropriate.
215 udelay(PIO_WAIT_TIMEOUT);
218 dev_err(pcie->dev, "PIO read/write transfer time out\n");
223 * pcie_advk_check_pio_status() - Validate PIO status and get the read result
225 * @pcie: Pointer to the PCI bus
226 * @read: Read from or write to configuration space - true(read) false(write)
227 * @read_val: Pointer to the read result, only valid when read is true
230 static int pcie_advk_check_pio_status(struct pcie_advk *pcie,
236 char *strcomp_status, *str_posted;
238 reg = advk_readl(pcie, PIO_STAT);
239 status = (reg & PIO_COMPLETION_STATUS_MASK) >>
240 PIO_COMPLETION_STATUS_SHIFT;
243 case PIO_COMPLETION_STATUS_OK:
244 if (reg & PIO_ERR_STATUS) {
245 strcomp_status = "COMP_ERR";
248 /* Get the read result */
250 *read_val = advk_readl(pcie, PIO_RD_DATA);
252 strcomp_status = NULL;
254 case PIO_COMPLETION_STATUS_UR:
256 /* For reading, UR is not an error status. */
257 *read_val = CFG_RD_UR_VAL;
258 strcomp_status = NULL;
260 strcomp_status = "UR";
263 case PIO_COMPLETION_STATUS_CRS:
265 /* For reading, CRS is not an error status. */
266 *read_val = CFG_RD_CRS_VAL;
267 strcomp_status = NULL;
269 strcomp_status = "CRS";
272 case PIO_COMPLETION_STATUS_CA:
273 strcomp_status = "CA";
276 strcomp_status = "Unknown";
283 if (reg & PIO_NON_POSTED_REQ)
284 str_posted = "Non-posted";
286 str_posted = "Posted";
288 dev_err(pcie->dev, "%s PIO Response Status: %s, %#x @ %#x\n",
289 str_posted, strcomp_status, reg,
290 advk_readl(pcie, PIO_ADDR_LS));
296 * pcie_advk_read_config() - Read from configuration space
298 * @bus: Pointer to the PCI bus
299 * @bdf: Identifies the PCIe device to access
300 * @offset: The offset into the device's configuration space
301 * @valuep: A pointer at which to store the read value
302 * @size: Indicates the size of access to perform
304 * Read a value of size @size from offset @offset within the configuration
305 * space of the device identified by the bus, device & function numbers in @bdf
306 * on the PCI bus @bus.
308 * Return: 0 on success
310 static int pcie_advk_read_config(const struct udevice *bus, pci_dev_t bdf,
311 uint offset, ulong *valuep,
312 enum pci_size_t size)
314 struct pcie_advk *pcie = dev_get_priv(bus);
318 dev_dbg(pcie->dev, "PCIE CFG read: (b,d,f)=(%2d,%2d,%2d) ",
319 PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
321 if (!pcie_advk_addr_valid(bdf, pcie->first_busno)) {
322 dev_dbg(pcie->dev, "- out of range\n");
323 *valuep = pci_get_ff(size);
327 if (advk_readl(pcie, PIO_START)) {
329 "Previous PIO read/write transfer is still running\n");
330 if (offset != PCI_VENDOR_ID)
332 *valuep = CFG_RD_CRS_VAL;
336 /* Program the control register */
337 reg = advk_readl(pcie, PIO_CTRL);
338 reg &= ~PIO_CTRL_TYPE_MASK;
339 if (PCI_BUS(bdf) == pcie->first_busno)
340 reg |= PCIE_CONFIG_RD_TYPE0;
342 reg |= PCIE_CONFIG_RD_TYPE1;
343 advk_writel(pcie, reg, PIO_CTRL);
345 /* Program the address registers */
346 reg = PCIE_BDF(bdf) | PCIE_CONF_REG(offset);
347 advk_writel(pcie, reg, PIO_ADDR_LS);
348 advk_writel(pcie, 0, PIO_ADDR_MS);
350 /* Start the transfer */
351 advk_writel(pcie, 1, PIO_ISR);
352 advk_writel(pcie, 1, PIO_START);
354 if (!pcie_advk_wait_pio(pcie)) {
355 if (offset != PCI_VENDOR_ID)
357 *valuep = CFG_RD_CRS_VAL;
361 /* Check PIO status and get the read result */
362 ret = pcie_advk_check_pio_status(pcie, true, ®);
366 dev_dbg(pcie->dev, "(addr,size,val)=(0x%04x, %d, 0x%08x)\n",
368 *valuep = pci_conv_32_to_size(reg, offset, size);
374 * pcie_calc_datastrobe() - Calculate data strobe
376 * @offset: The offset into the device's configuration space
377 * @size: Indicates the size of access to perform
379 * Calculate data strobe according to offset and size
382 static uint pcie_calc_datastrobe(uint offset, enum pci_size_t size)
384 uint bytes, data_strobe;
397 data_strobe = GENMASK(bytes - 1, 0) << (offset & 0x3);
403 * pcie_advk_write_config() - Write to configuration space
405 * @bus: Pointer to the PCI bus
406 * @bdf: Identifies the PCIe device to access
407 * @offset: The offset into the device's configuration space
408 * @value: The value to write
409 * @size: Indicates the size of access to perform
411 * Write the value @value of size @size from offset @offset within the
412 * configuration space of the device identified by the bus, device & function
413 * numbers in @bdf on the PCI bus @bus.
415 * Return: 0 on success
417 static int pcie_advk_write_config(struct udevice *bus, pci_dev_t bdf,
418 uint offset, ulong value,
419 enum pci_size_t size)
421 struct pcie_advk *pcie = dev_get_priv(bus);
424 dev_dbg(pcie->dev, "PCIE CFG write: (b,d,f)=(%2d,%2d,%2d) ",
425 PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
426 dev_dbg(pcie->dev, "(addr,size,val)=(0x%04x, %d, 0x%08lx)\n",
427 offset, size, value);
429 if (!pcie_advk_addr_valid(bdf, pcie->first_busno)) {
430 dev_dbg(pcie->dev, "- out of range\n");
434 if (advk_readl(pcie, PIO_START)) {
436 "Previous PIO read/write transfer is still running\n");
440 /* Program the control register */
441 reg = advk_readl(pcie, PIO_CTRL);
442 reg &= ~PIO_CTRL_TYPE_MASK;
443 if (PCI_BUS(bdf) == pcie->first_busno)
444 reg |= PCIE_CONFIG_WR_TYPE0;
446 reg |= PCIE_CONFIG_WR_TYPE1;
447 advk_writel(pcie, reg, PIO_CTRL);
449 /* Program the address registers */
450 reg = PCIE_BDF(bdf) | PCIE_CONF_REG(offset);
451 advk_writel(pcie, reg, PIO_ADDR_LS);
452 advk_writel(pcie, 0, PIO_ADDR_MS);
453 dev_dbg(pcie->dev, "\tPIO req. - addr = 0x%08x\n", reg);
455 /* Program the data register */
456 reg = pci_conv_size_to_32(0, value, offset, size);
457 advk_writel(pcie, reg, PIO_WR_DATA);
458 dev_dbg(pcie->dev, "\tPIO req. - val = 0x%08x\n", reg);
460 /* Program the data strobe */
461 reg = pcie_calc_datastrobe(offset, size);
462 advk_writel(pcie, reg, PIO_WR_DATA_STRB);
463 dev_dbg(pcie->dev, "\tPIO req. - strb = 0x%02x\n", reg);
465 /* Start the transfer */
466 advk_writel(pcie, 1, PIO_ISR);
467 advk_writel(pcie, 1, PIO_START);
469 if (!pcie_advk_wait_pio(pcie)) {
473 /* Check PIO status */
474 pcie_advk_check_pio_status(pcie, false, ®);
480 * pcie_advk_link_up() - Check if PCIe link is up or not
482 * @pcie: The PCI device to access
484 * Return 1 (true) on link up.
485 * Return 0 (false) on link down.
487 static int pcie_advk_link_up(struct pcie_advk *pcie)
489 u32 val, ltssm_state;
491 val = advk_readl(pcie, CFG_REG);
492 ltssm_state = (val >> LTSSM_SHIFT) & LTSSM_MASK;
493 return ltssm_state >= LTSSM_L0;
497 * pcie_advk_wait_for_link() - Wait for link training to be accomplished
499 * @pcie: The PCI device to access
501 * Wait up to 1 second for link training to be accomplished.
503 * Return 1 (true) if link training ends up with link up success.
504 * Return 0 (false) if link training ends up with link up failure.
506 static int pcie_advk_wait_for_link(struct pcie_advk *pcie)
510 /* check if the link is up or not */
511 for (retries = 0; retries < LINK_MAX_RETRIES; retries++) {
512 if (pcie_advk_link_up(pcie)) {
513 printf("PCIE-%d: Link up\n", pcie->first_busno);
517 udelay(LINK_WAIT_TIMEOUT);
520 printf("PCIE-%d: Link down\n", pcie->first_busno);
526 * pcie_advk_setup_hw() - PCIe initailzation
528 * @pcie: The PCI device to access
530 * Return: 0 on success
532 static int pcie_advk_setup_hw(struct pcie_advk *pcie)
536 /* Set to Direct mode */
537 reg = advk_readl(pcie, CTRL_CONFIG_REG);
538 reg &= ~(CTRL_MODE_MASK << CTRL_MODE_SHIFT);
539 reg |= ((PCIE_CORE_MODE_DIRECT & CTRL_MODE_MASK) << CTRL_MODE_SHIFT);
540 advk_writel(pcie, reg, CTRL_CONFIG_REG);
542 /* Set PCI global control register to RC mode */
543 reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG);
544 reg |= (IS_RC_MSK << IS_RC_SHIFT);
545 advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG);
548 * Replace incorrect PCI vendor id value 0x1b4b by correct value 0x11ab.
549 * VENDOR_ID_REG contains vendor id in low 16 bits and subsystem vendor
550 * id in high 16 bits. Updating this register changes readback value of
551 * read-only vendor id bits in PCIE_CORE_DEV_ID_REG register. Workaround
552 * for erratum 4.1: "The value of device and vendor ID is incorrect".
554 advk_writel(pcie, 0x11ab11ab, VENDOR_ID_REG);
556 /* Set Advanced Error Capabilities and Control PF0 register */
557 reg = PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX |
558 PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX_EN |
559 PCIE_CORE_ERR_CAPCTL_ECRC_CHECK |
560 PCIE_CORE_ERR_CAPCTL_ECRC_CHECK_RCV;
561 advk_writel(pcie, reg, PCIE_CORE_ERR_CAPCTL_REG);
563 /* Set PCIe Device Control and Status 1 PF0 register */
564 reg = PCIE_CORE_DEV_CTRL_STATS_RELAX_ORDER_DISABLE |
565 (PCIE_CORE_DEV_CTRL_STATS_MAX_PAYLOAD_SIZE <<
566 PCIE_CORE_DEV_CTRL_STATS_MAX_PAYLOAD_SIZE_SHIFT) |
567 (PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SIZE <<
568 PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SIZE_SHIFT) |
569 PCIE_CORE_DEV_CTRL_STATS_SNOOP_DISABLE;
570 advk_writel(pcie, reg, PCIE_CORE_DEV_CTRL_STATS_REG);
572 /* Program PCIe Control 2 to disable strict ordering */
573 reg = PCIE_CORE_CTRL2_RESERVED |
574 PCIE_CORE_CTRL2_TD_ENABLE;
575 advk_writel(pcie, reg, PCIE_CORE_CTRL2_REG);
578 reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG);
579 reg &= ~PCIE_GEN_SEL_MSK;
581 advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG);
584 reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG);
585 reg &= ~LANE_CNT_MSK;
587 advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG);
589 /* Enable link training */
590 reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG);
591 reg |= LINK_TRAINING_EN;
592 advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG);
595 * Enable AXI address window location generation:
596 * When it is enabled, the default outbound window
597 * configurations (Default User Field: 0xD0074CFC)
598 * are used to transparent address translation for
599 * the outbound transactions. Thus, PCIe address
600 * windows are not required.
602 reg = advk_readl(pcie, PCIE_CORE_CTRL2_REG);
603 reg |= PCIE_CORE_CTRL2_ADDRWIN_MAP_ENABLE;
604 advk_writel(pcie, reg, PCIE_CORE_CTRL2_REG);
607 * Bypass the address window mapping for PIO:
608 * Since PIO access already contains all required
609 * info over AXI interface by PIO registers, the
610 * address window is not required.
612 reg = advk_readl(pcie, PIO_CTRL);
613 reg |= PIO_CTRL_ADDR_WIN_DISABLE;
614 advk_writel(pcie, reg, PIO_CTRL);
616 /* Wait for PCIe link up */
617 if (pcie_advk_wait_for_link(pcie))
620 reg = advk_readl(pcie, PCIE_CORE_CMD_STATUS_REG);
621 reg |= PCIE_CORE_CMD_MEM_ACCESS_EN |
622 PCIE_CORE_CMD_IO_ACCESS_EN |
623 PCIE_CORE_CMD_MEM_IO_REQ_EN;
624 advk_writel(pcie, reg, PCIE_CORE_CMD_STATUS_REG);
630 * pcie_advk_probe() - Probe the PCIe bus for active link
632 * @dev: A pointer to the device being operated on
634 * Probe for an active link on the PCIe bus and configure the controller
635 * to enable this port.
637 * Return: 0 on success, else -ENODEV
639 static int pcie_advk_probe(struct udevice *dev)
641 struct pcie_advk *pcie = dev_get_priv(dev);
643 gpio_request_by_name(dev, "reset-gpios", 0, &pcie->reset_gpio,
646 * Issue reset to add-in card through the dedicated GPIO.
647 * Some boards are connecting the card reset pin to common system
648 * reset wire and others are using separate GPIO port.
649 * In the last case we have to release a reset of the addon card
653 * The PCIe RESET signal is not supposed to be released along
654 * with the SOC RESET signal. It should be lowered as early as
655 * possible before PCIe PHY initialization. Moreover, the PCIe
656 * clock should be gated as well.
658 if (dm_gpio_is_valid(&pcie->reset_gpio)) {
659 dev_dbg(dev, "Toggle PCIE Reset GPIO ...\n");
660 dm_gpio_set_value(&pcie->reset_gpio, 1);
662 dm_gpio_set_value(&pcie->reset_gpio, 0);
664 dev_warn(dev, "PCIE Reset on GPIO support is missing\n");
667 pcie->first_busno = dev_seq(dev);
668 pcie->dev = pci_get_controller(dev);
670 return pcie_advk_setup_hw(pcie);
673 static int pcie_advk_remove(struct udevice *dev)
675 struct pcie_advk *pcie = dev_get_priv(dev);
678 reg = advk_readl(pcie, PCIE_CORE_CMD_STATUS_REG);
679 reg &= ~(PCIE_CORE_CMD_MEM_ACCESS_EN |
680 PCIE_CORE_CMD_IO_ACCESS_EN |
681 PCIE_CORE_CMD_MEM_IO_REQ_EN);
682 advk_writel(pcie, reg, PCIE_CORE_CMD_STATUS_REG);
684 reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG);
685 reg &= ~LINK_TRAINING_EN;
686 advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG);
692 * pcie_advk_of_to_plat() - Translate from DT to device state
694 * @dev: A pointer to the device being operated on
696 * Translate relevant data from the device tree pertaining to device @dev into
697 * state that the driver will later make use of. This state is stored in the
698 * device's private data structure.
700 * Return: 0 on success, else -EINVAL
702 static int pcie_advk_of_to_plat(struct udevice *dev)
704 struct pcie_advk *pcie = dev_get_priv(dev);
706 /* Get the register base address */
707 pcie->base = (void *)dev_read_addr_index(dev, 0);
708 if ((fdt_addr_t)pcie->base == FDT_ADDR_T_NONE)
714 static const struct dm_pci_ops pcie_advk_ops = {
715 .read_config = pcie_advk_read_config,
716 .write_config = pcie_advk_write_config,
719 static const struct udevice_id pcie_advk_ids[] = {
720 { .compatible = "marvell,armada-3700-pcie" },
724 U_BOOT_DRIVER(pcie_advk) = {
727 .of_match = pcie_advk_ids,
728 .ops = &pcie_advk_ops,
729 .of_to_plat = pcie_advk_of_to_plat,
730 .probe = pcie_advk_probe,
731 .remove = pcie_advk_remove,
732 .flags = DM_FLAG_OS_PREPARE,
733 .priv_auto = sizeof(struct pcie_advk),