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 /* PCIe window configuration */
103 #define OB_WIN_BASE_ADDR 0x4c00
104 #define OB_WIN_BLOCK_SIZE 0x20
105 #define OB_WIN_COUNT 8
106 #define OB_WIN_REG_ADDR(win, offset) (OB_WIN_BASE_ADDR + \
107 OB_WIN_BLOCK_SIZE * (win) + \
109 #define OB_WIN_MATCH_LS(win) OB_WIN_REG_ADDR(win, 0x00)
110 #define OB_WIN_ENABLE BIT(0)
111 #define OB_WIN_MATCH_MS(win) OB_WIN_REG_ADDR(win, 0x04)
112 #define OB_WIN_REMAP_LS(win) OB_WIN_REG_ADDR(win, 0x08)
113 #define OB_WIN_REMAP_MS(win) OB_WIN_REG_ADDR(win, 0x0c)
114 #define OB_WIN_MASK_LS(win) OB_WIN_REG_ADDR(win, 0x10)
115 #define OB_WIN_MASK_MS(win) OB_WIN_REG_ADDR(win, 0x14)
116 #define OB_WIN_ACTIONS(win) OB_WIN_REG_ADDR(win, 0x18)
117 #define OB_WIN_DEFAULT_ACTIONS (OB_WIN_ACTIONS(OB_WIN_COUNT-1) + 0x4)
118 #define OB_WIN_FUNC_NUM_MASK GENMASK(31, 24)
119 #define OB_WIN_FUNC_NUM_SHIFT 24
120 #define OB_WIN_FUNC_NUM_ENABLE BIT(23)
121 #define OB_WIN_BUS_NUM_BITS_MASK GENMASK(22, 20)
122 #define OB_WIN_BUS_NUM_BITS_SHIFT 20
123 #define OB_WIN_MSG_CODE_ENABLE BIT(22)
124 #define OB_WIN_MSG_CODE_MASK GENMASK(21, 14)
125 #define OB_WIN_MSG_CODE_SHIFT 14
126 #define OB_WIN_MSG_PAYLOAD_LEN BIT(12)
127 #define OB_WIN_ATTR_ENABLE BIT(11)
128 #define OB_WIN_ATTR_TC_MASK GENMASK(10, 8)
129 #define OB_WIN_ATTR_TC_SHIFT 8
130 #define OB_WIN_ATTR_RELAXED BIT(7)
131 #define OB_WIN_ATTR_NOSNOOP BIT(6)
132 #define OB_WIN_ATTR_POISON BIT(5)
133 #define OB_WIN_ATTR_IDO BIT(4)
134 #define OB_WIN_TYPE_MASK GENMASK(3, 0)
135 #define OB_WIN_TYPE_SHIFT 0
136 #define OB_WIN_TYPE_MEM 0x0
137 #define OB_WIN_TYPE_IO 0x4
138 #define OB_WIN_TYPE_CONFIG_TYPE0 0x8
139 #define OB_WIN_TYPE_CONFIG_TYPE1 0x9
140 #define OB_WIN_TYPE_MSG 0xc
142 /* LMI registers base address and register offsets */
143 #define LMI_BASE_ADDR 0x6000
144 #define CFG_REG (LMI_BASE_ADDR + 0x0)
145 #define LTSSM_SHIFT 24
146 #define LTSSM_MASK 0x3f
147 #define LTSSM_L0 0x10
148 #define VENDOR_ID_REG (LMI_BASE_ADDR + 0x44)
150 /* PCIe core controller registers */
151 #define CTRL_CORE_BASE_ADDR 0x18000
152 #define CTRL_CONFIG_REG (CTRL_CORE_BASE_ADDR + 0x0)
153 #define CTRL_MODE_SHIFT 0x0
154 #define CTRL_MODE_MASK 0x1
155 #define PCIE_CORE_MODE_DIRECT 0x0
156 #define PCIE_CORE_MODE_COMMAND 0x1
158 /* Transaction types */
159 #define PCIE_CONFIG_RD_TYPE0 0x8
160 #define PCIE_CONFIG_RD_TYPE1 0x9
161 #define PCIE_CONFIG_WR_TYPE0 0xa
162 #define PCIE_CONFIG_WR_TYPE1 0xb
164 /* PCI_BDF shifts 8bit, so we need extra 4bit shift */
165 #define PCIE_BDF(dev) (dev << 4)
166 #define PCIE_CONF_BUS(bus) (((bus) & 0xff) << 20)
167 #define PCIE_CONF_DEV(dev) (((dev) & 0x1f) << 15)
168 #define PCIE_CONF_FUNC(fun) (((fun) & 0x7) << 12)
169 #define PCIE_CONF_REG(reg) ((reg) & 0xffc)
170 #define PCIE_CONF_ADDR(bus, devfn, where) \
171 (PCIE_CONF_BUS(bus) | PCIE_CONF_DEV(PCI_SLOT(devfn)) | \
172 PCIE_CONF_FUNC(PCI_FUNC(devfn)) | PCIE_CONF_REG(where))
174 /* PCIe Retries & Timeout definitions */
175 #define PIO_MAX_RETRIES 1500
176 #define PIO_WAIT_TIMEOUT 1000
177 #define LINK_MAX_RETRIES 10
178 #define LINK_WAIT_TIMEOUT 100000
180 #define CFG_RD_CRS_VAL 0xFFFF0001
183 * struct pcie_advk - Advk PCIe controller state
185 * @reg_base: The base address of the register space.
186 * @first_busno: This driver supports multiple PCIe controllers.
187 * first_busno stores the bus number of the PCIe root-port
188 * number which may vary depending on the PCIe setup
189 * (PEX switches etc).
190 * @device: The pointer to PCI uclass device.
196 struct gpio_desc reset_gpio;
199 static inline void advk_writel(struct pcie_advk *pcie, uint val, uint reg)
201 writel(val, pcie->base + reg);
204 static inline uint advk_readl(struct pcie_advk *pcie, uint reg)
206 return readl(pcie->base + reg);
210 * pcie_advk_addr_valid() - Check for valid bus address
212 * @bdf: The PCI device to access
213 * @first_busno: Bus number of the PCIe controller root complex
215 * Return: 1 on valid, 0 on invalid
217 static int pcie_advk_addr_valid(pci_dev_t bdf, int first_busno)
220 * In PCIE-E only a single device (0) can exist
221 * on the local bus. Beyound the local bus, there might be
222 * a Switch and everything is possible.
224 if ((PCI_BUS(bdf) == first_busno) && (PCI_DEV(bdf) > 0))
231 * pcie_advk_wait_pio() - Wait for PIO access to be accomplished
233 * @pcie: The PCI device to access
235 * Wait up to 1.5 seconds for PIO access to be accomplished.
237 * Return positive - retry count if PIO access is accomplished.
238 * Return negative - error if PIO access is timed out.
240 static int pcie_advk_wait_pio(struct pcie_advk *pcie)
245 for (count = 1; count <= PIO_MAX_RETRIES; count++) {
246 start = advk_readl(pcie, PIO_START);
247 isr = advk_readl(pcie, PIO_ISR);
251 * Do not check the PIO state too frequently,
252 * 100us delay is appropriate.
254 udelay(PIO_WAIT_TIMEOUT);
257 dev_err(pcie->dev, "PIO read/write transfer time out\n");
262 * pcie_advk_check_pio_status() - Validate PIO status and get the read result
264 * @pcie: Pointer to the PCI bus
265 * @allow_crs: Only for read requests, if CRS response is allowed
266 * @read_val: Pointer to the read result
268 * Return: 0 on success
270 static int pcie_advk_check_pio_status(struct pcie_advk *pcie,
277 char *strcomp_status, *str_posted;
279 reg = advk_readl(pcie, PIO_STAT);
280 status = (reg & PIO_COMPLETION_STATUS_MASK) >>
281 PIO_COMPLETION_STATUS_SHIFT;
284 case PIO_COMPLETION_STATUS_OK:
285 if (reg & PIO_ERR_STATUS) {
286 strcomp_status = "COMP_ERR";
290 /* Get the read result */
292 *read_val = advk_readl(pcie, PIO_RD_DATA);
294 strcomp_status = NULL;
297 case PIO_COMPLETION_STATUS_UR:
298 strcomp_status = "UR";
301 case PIO_COMPLETION_STATUS_CRS:
302 if (allow_crs && read_val) {
303 /* For reading, CRS is not an error status. */
304 *read_val = CFG_RD_CRS_VAL;
305 strcomp_status = NULL;
308 strcomp_status = "CRS";
312 case PIO_COMPLETION_STATUS_CA:
313 strcomp_status = "CA";
317 strcomp_status = "Unknown";
325 if (reg & PIO_NON_POSTED_REQ)
326 str_posted = "Non-posted";
328 str_posted = "Posted";
330 dev_err(pcie->dev, "%s PIO Response Status: %s, %#x @ %#x\n",
331 str_posted, strcomp_status, reg,
332 advk_readl(pcie, PIO_ADDR_LS));
338 * pcie_advk_read_config() - Read from configuration space
340 * @bus: Pointer to the PCI bus
341 * @bdf: Identifies the PCIe device to access
342 * @offset: The offset into the device's configuration space
343 * @valuep: A pointer at which to store the read value
344 * @size: Indicates the size of access to perform
346 * Read a value of size @size from offset @offset within the configuration
347 * space of the device identified by the bus, device & function numbers in @bdf
348 * on the PCI bus @bus.
350 * Return: 0 on success
352 static int pcie_advk_read_config(const struct udevice *bus, pci_dev_t bdf,
353 uint offset, ulong *valuep,
354 enum pci_size_t size)
356 struct pcie_advk *pcie = dev_get_priv(bus);
362 dev_dbg(pcie->dev, "PCIE CFG read: (b,d,f)=(%2d,%2d,%2d) ",
363 PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
365 if (!pcie_advk_addr_valid(bdf, pcie->first_busno)) {
366 dev_dbg(pcie->dev, "- out of range\n");
367 *valuep = pci_get_ff(size);
372 * Returning fabricated CRS value (0xFFFF0001) by PCIe Root Complex to
373 * OS is allowed only for 4-byte PCI_VENDOR_ID config read request and
374 * only when CRSSVE bit in Root Port PCIe device is enabled. In all
375 * other error PCIe Root Complex must return all-ones.
376 * Aardvark HW does not have Root Port PCIe device and U-Boot does not
377 * implement emulation of this device.
378 * U-Boot currently does not support handling of CRS return value for
379 * PCI_VENDOR_ID config read request and also does not set CRSSVE bit.
380 * Therefore disable returning CRS response for now.
384 if (advk_readl(pcie, PIO_START)) {
386 "Previous PIO read/write transfer is still running\n");
388 *valuep = CFG_RD_CRS_VAL;
391 *valuep = pci_get_ff(size);
395 /* Program the control register */
396 reg = advk_readl(pcie, PIO_CTRL);
397 reg &= ~PIO_CTRL_TYPE_MASK;
398 if (PCI_BUS(bdf) == pcie->first_busno)
399 reg |= PCIE_CONFIG_RD_TYPE0;
401 reg |= PCIE_CONFIG_RD_TYPE1;
402 advk_writel(pcie, reg, PIO_CTRL);
404 /* Program the address registers */
405 reg = PCIE_BDF(bdf) | PCIE_CONF_REG(offset);
406 advk_writel(pcie, reg, PIO_ADDR_LS);
407 advk_writel(pcie, 0, PIO_ADDR_MS);
412 /* Start the transfer */
413 advk_writel(pcie, 1, PIO_ISR);
414 advk_writel(pcie, 1, PIO_START);
416 ret = pcie_advk_wait_pio(pcie);
419 *valuep = CFG_RD_CRS_VAL;
422 *valuep = pci_get_ff(size);
428 /* Check PIO status and get the read result */
429 ret = pcie_advk_check_pio_status(pcie, allow_crs, ®);
430 if (ret == -EAGAIN && retry_count < PIO_MAX_RETRIES)
433 *valuep = pci_get_ff(size);
437 dev_dbg(pcie->dev, "(addr,size,val)=(0x%04x, %d, 0x%08x)\n",
439 *valuep = pci_conv_32_to_size(reg, offset, size);
445 * pcie_calc_datastrobe() - Calculate data strobe
447 * @offset: The offset into the device's configuration space
448 * @size: Indicates the size of access to perform
450 * Calculate data strobe according to offset and size
453 static uint pcie_calc_datastrobe(uint offset, enum pci_size_t size)
455 uint bytes, data_strobe;
468 data_strobe = GENMASK(bytes - 1, 0) << (offset & 0x3);
474 * pcie_advk_write_config() - Write to configuration space
476 * @bus: Pointer to the PCI bus
477 * @bdf: Identifies the PCIe device to access
478 * @offset: The offset into the device's configuration space
479 * @value: The value to write
480 * @size: Indicates the size of access to perform
482 * Write the value @value of size @size from offset @offset within the
483 * configuration space of the device identified by the bus, device & function
484 * numbers in @bdf on the PCI bus @bus.
486 * Return: 0 on success
488 static int pcie_advk_write_config(struct udevice *bus, pci_dev_t bdf,
489 uint offset, ulong value,
490 enum pci_size_t size)
492 struct pcie_advk *pcie = dev_get_priv(bus);
497 dev_dbg(pcie->dev, "PCIE CFG write: (b,d,f)=(%2d,%2d,%2d) ",
498 PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
499 dev_dbg(pcie->dev, "(addr,size,val)=(0x%04x, %d, 0x%08lx)\n",
500 offset, size, value);
502 if (!pcie_advk_addr_valid(bdf, pcie->first_busno)) {
503 dev_dbg(pcie->dev, "- out of range\n");
507 if (advk_readl(pcie, PIO_START)) {
509 "Previous PIO read/write transfer is still running\n");
513 /* Program the control register */
514 reg = advk_readl(pcie, PIO_CTRL);
515 reg &= ~PIO_CTRL_TYPE_MASK;
516 if (PCI_BUS(bdf) == pcie->first_busno)
517 reg |= PCIE_CONFIG_WR_TYPE0;
519 reg |= PCIE_CONFIG_WR_TYPE1;
520 advk_writel(pcie, reg, PIO_CTRL);
522 /* Program the address registers */
523 reg = PCIE_BDF(bdf) | PCIE_CONF_REG(offset);
524 advk_writel(pcie, reg, PIO_ADDR_LS);
525 advk_writel(pcie, 0, PIO_ADDR_MS);
526 dev_dbg(pcie->dev, "\tPIO req. - addr = 0x%08x\n", reg);
528 /* Program the data register */
529 reg = pci_conv_size_to_32(0, value, offset, size);
530 advk_writel(pcie, reg, PIO_WR_DATA);
531 dev_dbg(pcie->dev, "\tPIO req. - val = 0x%08x\n", reg);
533 /* Program the data strobe */
534 reg = pcie_calc_datastrobe(offset, size);
535 advk_writel(pcie, reg, PIO_WR_DATA_STRB);
536 dev_dbg(pcie->dev, "\tPIO req. - strb = 0x%02x\n", reg);
541 /* Start the transfer */
542 advk_writel(pcie, 1, PIO_ISR);
543 advk_writel(pcie, 1, PIO_START);
545 ret = pcie_advk_wait_pio(pcie);
551 /* Check PIO status */
552 ret = pcie_advk_check_pio_status(pcie, false, NULL);
553 if (ret == -EAGAIN && retry_count < PIO_MAX_RETRIES)
559 * pcie_advk_link_up() - Check if PCIe link is up or not
561 * @pcie: The PCI device to access
563 * Return 1 (true) on link up.
564 * Return 0 (false) on link down.
566 static int pcie_advk_link_up(struct pcie_advk *pcie)
568 u32 val, ltssm_state;
570 val = advk_readl(pcie, CFG_REG);
571 ltssm_state = (val >> LTSSM_SHIFT) & LTSSM_MASK;
572 return ltssm_state >= LTSSM_L0;
576 * pcie_advk_wait_for_link() - Wait for link training to be accomplished
578 * @pcie: The PCI device to access
580 * Wait up to 1 second for link training to be accomplished.
582 * Return 1 (true) if link training ends up with link up success.
583 * Return 0 (false) if link training ends up with link up failure.
585 static int pcie_advk_wait_for_link(struct pcie_advk *pcie)
589 /* check if the link is up or not */
590 for (retries = 0; retries < LINK_MAX_RETRIES; retries++) {
591 if (pcie_advk_link_up(pcie)) {
592 printf("PCIE-%d: Link up\n", pcie->first_busno);
596 udelay(LINK_WAIT_TIMEOUT);
599 printf("PCIE-%d: Link down\n", pcie->first_busno);
605 * Set PCIe address window register which could be used for memory
608 static void pcie_advk_set_ob_win(struct pcie_advk *pcie, u8 win_num,
609 phys_addr_t match, phys_addr_t remap,
610 phys_addr_t mask, u32 actions)
612 advk_writel(pcie, OB_WIN_ENABLE |
613 lower_32_bits(match), OB_WIN_MATCH_LS(win_num));
614 advk_writel(pcie, upper_32_bits(match), OB_WIN_MATCH_MS(win_num));
615 advk_writel(pcie, lower_32_bits(remap), OB_WIN_REMAP_LS(win_num));
616 advk_writel(pcie, upper_32_bits(remap), OB_WIN_REMAP_MS(win_num));
617 advk_writel(pcie, lower_32_bits(mask), OB_WIN_MASK_LS(win_num));
618 advk_writel(pcie, upper_32_bits(mask), OB_WIN_MASK_MS(win_num));
619 advk_writel(pcie, actions, OB_WIN_ACTIONS(win_num));
622 static void pcie_advk_disable_ob_win(struct pcie_advk *pcie, u8 win_num)
624 advk_writel(pcie, 0, OB_WIN_MATCH_LS(win_num));
625 advk_writel(pcie, 0, OB_WIN_MATCH_MS(win_num));
626 advk_writel(pcie, 0, OB_WIN_REMAP_LS(win_num));
627 advk_writel(pcie, 0, OB_WIN_REMAP_MS(win_num));
628 advk_writel(pcie, 0, OB_WIN_MASK_LS(win_num));
629 advk_writel(pcie, 0, OB_WIN_MASK_MS(win_num));
630 advk_writel(pcie, 0, OB_WIN_ACTIONS(win_num));
633 static void pcie_advk_set_ob_region(struct pcie_advk *pcie, int *wins,
634 struct pci_region *region, u32 actions)
636 phys_addr_t phys_start = region->phys_start;
637 pci_addr_t bus_start = region->bus_start;
638 pci_size_t size = region->size;
639 phys_addr_t win_mask;
646 * The n-th PCIe window is configured by tuple (match, remap, mask)
647 * and an access to address A uses this window if A matches the
648 * match with given mask.
649 * So every PCIe window size must be a power of two and every start
650 * address must be aligned to window size. Minimal size is 64 KiB
651 * because lower 16 bits of mask must be zero. Remapped address
652 * may have set only bits from the mask.
654 while (*wins < OB_WIN_COUNT && size > 0) {
655 /* Calculate the largest aligned window size */
656 win_size = (1ULL << (fls64(size) - 1)) |
657 (phys_start ? (1ULL << __ffs64(phys_start)) : 0);
658 win_size = 1ULL << __ffs64(win_size);
659 win_mask = ~(win_size - 1);
660 if (win_size < 0x10000 || (bus_start & ~win_mask))
664 "Configuring PCIe window %d: [0x%llx-0x%llx] as 0x%x\n",
665 *wins, (u64)phys_start, (u64)phys_start + win_size,
667 pcie_advk_set_ob_win(pcie, *wins, phys_start, bus_start,
670 phys_start += win_size;
671 bus_start += win_size;
679 "Invalid PCIe region [0x%llx-0x%llx]\n",
680 (u64)region->phys_start,
681 (u64)region->phys_start + region->size);
686 * pcie_advk_setup_hw() - PCIe initailzation
688 * @pcie: The PCI device to access
690 * Return: 0 on success
692 static int pcie_advk_setup_hw(struct pcie_advk *pcie)
694 struct pci_region *io, *mem, *pref;
698 /* Set to Direct mode */
699 reg = advk_readl(pcie, CTRL_CONFIG_REG);
700 reg &= ~(CTRL_MODE_MASK << CTRL_MODE_SHIFT);
701 reg |= ((PCIE_CORE_MODE_DIRECT & CTRL_MODE_MASK) << CTRL_MODE_SHIFT);
702 advk_writel(pcie, reg, CTRL_CONFIG_REG);
704 /* Set PCI global control register to RC mode */
705 reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG);
706 reg |= (IS_RC_MSK << IS_RC_SHIFT);
707 advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG);
710 * Replace incorrect PCI vendor id value 0x1b4b by correct value 0x11ab.
711 * VENDOR_ID_REG contains vendor id in low 16 bits and subsystem vendor
712 * id in high 16 bits. Updating this register changes readback value of
713 * read-only vendor id bits in PCIE_CORE_DEV_ID_REG register. Workaround
714 * for erratum 4.1: "The value of device and vendor ID is incorrect".
716 advk_writel(pcie, 0x11ab11ab, VENDOR_ID_REG);
718 /* Set Advanced Error Capabilities and Control PF0 register */
719 reg = PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX |
720 PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX_EN |
721 PCIE_CORE_ERR_CAPCTL_ECRC_CHECK |
722 PCIE_CORE_ERR_CAPCTL_ECRC_CHECK_RCV;
723 advk_writel(pcie, reg, PCIE_CORE_ERR_CAPCTL_REG);
725 /* Set PCIe Device Control and Status 1 PF0 register */
726 reg = PCIE_CORE_DEV_CTRL_STATS_RELAX_ORDER_DISABLE |
727 (PCIE_CORE_DEV_CTRL_STATS_MAX_PAYLOAD_SIZE <<
728 PCIE_CORE_DEV_CTRL_STATS_MAX_PAYLOAD_SIZE_SHIFT) |
729 (PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SIZE <<
730 PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SIZE_SHIFT) |
731 PCIE_CORE_DEV_CTRL_STATS_SNOOP_DISABLE;
732 advk_writel(pcie, reg, PCIE_CORE_DEV_CTRL_STATS_REG);
734 /* Program PCIe Control 2 to disable strict ordering */
735 reg = PCIE_CORE_CTRL2_RESERVED |
736 PCIE_CORE_CTRL2_TD_ENABLE;
737 advk_writel(pcie, reg, PCIE_CORE_CTRL2_REG);
740 reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG);
741 reg &= ~PCIE_GEN_SEL_MSK;
743 advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG);
746 reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG);
747 reg &= ~LANE_CNT_MSK;
749 advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG);
751 /* Enable link training */
752 reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG);
753 reg |= LINK_TRAINING_EN;
754 advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG);
757 * Enable AXI address window location generation:
758 * When it is enabled, the default outbound window
759 * configurations (Default User Field: 0xD0074CFC)
760 * are used to transparent address translation for
761 * the outbound transactions. Thus, PCIe address
762 * windows are not required for transparent memory
763 * access when default outbound window configuration
764 * is set for memory access.
766 reg = advk_readl(pcie, PCIE_CORE_CTRL2_REG);
767 reg |= PCIE_CORE_CTRL2_ADDRWIN_MAP_ENABLE;
768 advk_writel(pcie, reg, PCIE_CORE_CTRL2_REG);
771 * Bypass the address window mapping for PIO:
772 * Since PIO access already contains all required
773 * info over AXI interface by PIO registers, the
774 * address window is not required.
776 reg = advk_readl(pcie, PIO_CTRL);
777 reg |= PIO_CTRL_ADDR_WIN_DISABLE;
778 advk_writel(pcie, reg, PIO_CTRL);
781 * Set memory access in Default User Field so it
782 * is not required to configure PCIe address for
783 * transparent memory access.
785 advk_writel(pcie, OB_WIN_TYPE_MEM, OB_WIN_DEFAULT_ACTIONS);
788 * Configure PCIe address windows for non-memory or
789 * non-transparent access as by default PCIe uses
790 * transparent memory access.
793 pci_get_regions(pcie->dev, &io, &mem, &pref);
795 pcie_advk_set_ob_region(pcie, &wins, io, OB_WIN_TYPE_IO);
796 if (mem && mem->phys_start != mem->bus_start)
797 pcie_advk_set_ob_region(pcie, &wins, mem, OB_WIN_TYPE_MEM);
798 if (pref && pref->phys_start != pref->bus_start)
799 pcie_advk_set_ob_region(pcie, &wins, pref, OB_WIN_TYPE_MEM);
801 /* Disable remaining PCIe outbound windows */
802 for (i = ((wins >= 0) ? wins : 0); i < OB_WIN_COUNT; i++)
803 pcie_advk_disable_ob_win(pcie, i);
808 /* Wait for PCIe link up */
809 if (pcie_advk_wait_for_link(pcie))
812 reg = advk_readl(pcie, PCIE_CORE_CMD_STATUS_REG);
813 reg |= PCIE_CORE_CMD_MEM_ACCESS_EN |
814 PCIE_CORE_CMD_IO_ACCESS_EN |
815 PCIE_CORE_CMD_MEM_IO_REQ_EN;
816 advk_writel(pcie, reg, PCIE_CORE_CMD_STATUS_REG);
822 * pcie_advk_probe() - Probe the PCIe bus for active link
824 * @dev: A pointer to the device being operated on
826 * Probe for an active link on the PCIe bus and configure the controller
827 * to enable this port.
829 * Return: 0 on success, else -ENODEV
831 static int pcie_advk_probe(struct udevice *dev)
833 struct pcie_advk *pcie = dev_get_priv(dev);
835 gpio_request_by_name(dev, "reset-gpios", 0, &pcie->reset_gpio,
838 * Issue reset to add-in card through the dedicated GPIO.
839 * Some boards are connecting the card reset pin to common system
840 * reset wire and others are using separate GPIO port.
841 * In the last case we have to release a reset of the addon card
845 * The PCIe RESET signal is not supposed to be released along
846 * with the SOC RESET signal. It should be lowered as early as
847 * possible before PCIe PHY initialization. Moreover, the PCIe
848 * clock should be gated as well.
850 if (dm_gpio_is_valid(&pcie->reset_gpio)) {
851 dev_dbg(dev, "Toggle PCIE Reset GPIO ...\n");
852 dm_gpio_set_value(&pcie->reset_gpio, 1);
854 dm_gpio_set_value(&pcie->reset_gpio, 0);
856 dev_warn(dev, "PCIE Reset on GPIO support is missing\n");
859 pcie->first_busno = dev_seq(dev);
860 pcie->dev = pci_get_controller(dev);
862 return pcie_advk_setup_hw(pcie);
865 static int pcie_advk_remove(struct udevice *dev)
867 struct pcie_advk *pcie = dev_get_priv(dev);
871 for (i = 0; i < OB_WIN_COUNT; i++)
872 pcie_advk_disable_ob_win(pcie, i);
874 reg = advk_readl(pcie, PCIE_CORE_CMD_STATUS_REG);
875 reg &= ~(PCIE_CORE_CMD_MEM_ACCESS_EN |
876 PCIE_CORE_CMD_IO_ACCESS_EN |
877 PCIE_CORE_CMD_MEM_IO_REQ_EN);
878 advk_writel(pcie, reg, PCIE_CORE_CMD_STATUS_REG);
880 reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG);
881 reg &= ~LINK_TRAINING_EN;
882 advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG);
888 * pcie_advk_of_to_plat() - Translate from DT to device state
890 * @dev: A pointer to the device being operated on
892 * Translate relevant data from the device tree pertaining to device @dev into
893 * state that the driver will later make use of. This state is stored in the
894 * device's private data structure.
896 * Return: 0 on success, else -EINVAL
898 static int pcie_advk_of_to_plat(struct udevice *dev)
900 struct pcie_advk *pcie = dev_get_priv(dev);
902 /* Get the register base address */
903 pcie->base = (void *)dev_read_addr_index(dev, 0);
904 if ((fdt_addr_t)pcie->base == FDT_ADDR_T_NONE)
910 static const struct dm_pci_ops pcie_advk_ops = {
911 .read_config = pcie_advk_read_config,
912 .write_config = pcie_advk_write_config,
915 static const struct udevice_id pcie_advk_ids[] = {
916 { .compatible = "marvell,armada-3700-pcie" },
920 U_BOOT_DRIVER(pcie_advk) = {
923 .of_match = pcie_advk_ids,
924 .ops = &pcie_advk_ops,
925 .of_to_plat = pcie_advk_of_to_plat,
926 .probe = pcie_advk_probe,
927 .remove = pcie_advk_remove,
928 .flags = DM_FLAG_OS_PREPARE,
929 .priv_auto = sizeof(struct pcie_advk),